drivers/scsi/hpsa.c

   1 /*
   2  *    Disk Array driver for HP Smart Array SAS controllers
   3  *    Copyright 2016 Microsemi Corporation
   4  *    Copyright 2014-2015 PMC-Sierra, Inc.
   5  *    Copyright 2000,2009-2015 Hewlett-Packard Development Company, L.P.
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; version 2 of the License.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  14  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  15  *
  16  *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/types.h>
  23 #include <linux/pci.h>
  24 #include <linux/pci-aspm.h>
  25 #include <linux/kernel.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include <linux/fs.h>
  29 #include <linux/timer.h>
  30 #include <linux/init.h>
  31 #include <linux/spinlock.h>
  32 #include <linux/compat.h>
  33 #include <linux/blktrace_api.h>
  34 #include <linux/uaccess.h>
  35 #include <linux/io.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/completion.h>
  38 #include <linux/moduleparam.h>
  39 #include <scsi/scsi.h>
  40 #include <scsi/scsi_cmnd.h>
  41 #include <scsi/scsi_device.h>
  42 #include <scsi/scsi_host.h>
  43 #include <scsi/scsi_tcq.h>
  44 #include <scsi/scsi_eh.h>
  45 #include <scsi/scsi_transport_sas.h>
  46 #include <scsi/scsi_dbg.h>
  47 #include <linux/cciss_ioctl.h>
  48 #include <linux/string.h>
  49 #include <linux/bitmap.h>
  50 #include <linux/atomic.h>
  51 #include <linux/jiffies.h>
  52 #include <linux/percpu-defs.h>
  53 #include <linux/percpu.h>
  54 #include <asm/unaligned.h>
  55 #include <asm/div64.h>
  56 #include "hpsa_cmd.h"
  57 #include "hpsa.h"
  58
  59 /*
  60  * HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.'
  61  * with an optional trailing '-' followed by a byte value (0-255).
  62  */
  63 #define HPSA_DRIVER_VERSION "3.4.20-170"
  64 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
  65 #define HPSA "hpsa"
  66
  67 /* How long to wait for CISS doorbell communication */
  68 #define CLEAR_EVENT_WAIT_INTERVAL 20    /* ms for each msleep() call */
  69 #define MODE_CHANGE_WAIT_INTERVAL 10    /* ms for each msleep() call */
  70 #define MAX_CLEAR_EVENT_WAIT 30000      /* times 20 ms = 600 s */
  71 #define MAX_MODE_CHANGE_WAIT 2000       /* times 10 ms = 20 s */
  72 #define MAX_IOCTL_CONFIG_WAIT 1000
  73
  74 /*define how many times we will try a command because of bus resets */
  75 #define MAX_CMD_RETRIES 3
  76 /* How long to wait before giving up on a command */
  77 #define HPSA_EH_PTRAID_TIMEOUT (240 * HZ)
  78
  79 /* Embedded module documentation macros - see modules.h */
  80 MODULE_AUTHOR("Hewlett-Packard Company");
  81 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
  82         HPSA_DRIVER_VERSION);
  83 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
  84 MODULE_VERSION(HPSA_DRIVER_VERSION);
  85 MODULE_LICENSE("GPL");
  86 MODULE_ALIAS("cciss");
  87
  88 static int hpsa_simple_mode;
  89 module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
  90 MODULE_PARM_DESC(hpsa_simple_mode,
  91         "Use 'simple mode' rather than 'performant mode'");
  92
  93 /* define the PCI info for the cards we can control */
  94 static const struct pci_device_id hpsa_pci_device_id[] = {
  95         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
  96         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
  97         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
  98         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
  99         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
 100         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324A},
 101         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324B},
 102         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
 103         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3350},
 104         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3351},
 105         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3352},
 106         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3353},
 107         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3354},
 108         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
 109         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
 110         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103c, 0x1920},
 111         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1921},
 112         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1922},
 113         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1923},
 114         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1924},
 115         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103c, 0x1925},
 116         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1926},
 117         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1928},
 118         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1929},
 119         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BD},
 120         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BE},
 121         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BF},
 122         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C0},
 123         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C1},
 124         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C2},
 125         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C3},
 126         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C4},
 127         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C5},
 128         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C6},
 129         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C7},
 130         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C8},
 131         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C9},
 132         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CA},
 133         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CB},
 134         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CC},
 135         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CD},
 136         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CE},
 137         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0580},
 138         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0581},
 139         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0582},
 140         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0583},
 141         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0584},
 142         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0585},
 143         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0076},
 144         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0087},
 145         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x007D},
 146         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0088},
 147         {PCI_VENDOR_ID_HP, 0x333f, 0x103c, 0x333f},
 148         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
 149                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 150         {PCI_VENDOR_ID_COMPAQ,     PCI_ANY_ID,  PCI_ANY_ID, PCI_ANY_ID,
 151                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 152         {0,}
 153 };
 154
 155 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
 156
 157 /*  board_id = Subsystem Device ID & Vendor ID
 158  *  product = Marketing Name for the board
 159  *  access = Address of the struct of function pointers
 160  */
 161 static struct board_type products[] = {
 162         {0x40700E11, "Smart Array 5300", &SA5A_access},
 163         {0x40800E11, "Smart Array 5i", &SA5B_access},
 164         {0x40820E11, "Smart Array 532", &SA5B_access},
 165         {0x40830E11, "Smart Array 5312", &SA5B_access},
 166         {0x409A0E11, "Smart Array 641", &SA5A_access},
 167         {0x409B0E11, "Smart Array 642", &SA5A_access},
 168         {0x409C0E11, "Smart Array 6400", &SA5A_access},
 169         {0x409D0E11, "Smart Array 6400 EM", &SA5A_access},
 170         {0x40910E11, "Smart Array 6i", &SA5A_access},
 171         {0x3225103C, "Smart Array P600", &SA5A_access},
 172         {0x3223103C, "Smart Array P800", &SA5A_access},
 173         {0x3234103C, "Smart Array P400", &SA5A_access},
 174         {0x3235103C, "Smart Array P400i", &SA5A_access},
 175         {0x3211103C, "Smart Array E200i", &SA5A_access},
 176         {0x3212103C, "Smart Array E200", &SA5A_access},
 177         {0x3213103C, "Smart Array E200i", &SA5A_access},
 178         {0x3214103C, "Smart Array E200i", &SA5A_access},
 179         {0x3215103C, "Smart Array E200i", &SA5A_access},
 180         {0x3237103C, "Smart Array E500", &SA5A_access},
 181         {0x323D103C, "Smart Array P700m", &SA5A_access},
 182         {0x3241103C, "Smart Array P212", &SA5_access},
 183         {0x3243103C, "Smart Array P410", &SA5_access},
 184         {0x3245103C, "Smart Array P410i", &SA5_access},
 185         {0x3247103C, "Smart Array P411", &SA5_access},
 186         {0x3249103C, "Smart Array P812", &SA5_access},
 187         {0x324A103C, "Smart Array P712m", &SA5_access},
 188         {0x324B103C, "Smart Array P711m", &SA5_access},
 189         {0x3233103C, "HP StorageWorks 1210m", &SA5_access}, /* alias of 333f */
 190         {0x3350103C, "Smart Array P222", &SA5_access},
 191         {0x3351103C, "Smart Array P420", &SA5_access},
 192         {0x3352103C, "Smart Array P421", &SA5_access},
 193         {0x3353103C, "Smart Array P822", &SA5_access},
 194         {0x3354103C, "Smart Array P420i", &SA5_access},
 195         {0x3355103C, "Smart Array P220i", &SA5_access},
 196         {0x3356103C, "Smart Array P721m", &SA5_access},
 197         {0x1920103C, "Smart Array P430i", &SA5_access},
 198         {0x1921103C, "Smart Array P830i", &SA5_access},
 199         {0x1922103C, "Smart Array P430", &SA5_access},
 200         {0x1923103C, "Smart Array P431", &SA5_access},
 201         {0x1924103C, "Smart Array P830", &SA5_access},
 202         {0x1925103C, "Smart Array P831", &SA5_access},
 203         {0x1926103C, "Smart Array P731m", &SA5_access},
 204         {0x1928103C, "Smart Array P230i", &SA5_access},
 205         {0x1929103C, "Smart Array P530", &SA5_access},
 206         {0x21BD103C, "Smart Array P244br", &SA5_access},
 207         {0x21BE103C, "Smart Array P741m", &SA5_access},
 208         {0x21BF103C, "Smart HBA H240ar", &SA5_access},
 209         {0x21C0103C, "Smart Array P440ar", &SA5_access},
 210         {0x21C1103C, "Smart Array P840ar", &SA5_access},
 211         {0x21C2103C, "Smart Array P440", &SA5_access},
 212         {0x21C3103C, "Smart Array P441", &SA5_access},
 213         {0x21C4103C, "Smart Array", &SA5_access},
 214         {0x21C5103C, "Smart Array P841", &SA5_access},
 215         {0x21C6103C, "Smart HBA H244br", &SA5_access},
 216         {0x21C7103C, "Smart HBA H240", &SA5_access},
 217         {0x21C8103C, "Smart HBA H241", &SA5_access},
 218         {0x21C9103C, "Smart Array", &SA5_access},
 219         {0x21CA103C, "Smart Array P246br", &SA5_access},
 220         {0x21CB103C, "Smart Array P840", &SA5_access},
 221         {0x21CC103C, "Smart Array", &SA5_access},
 222         {0x21CD103C, "Smart Array", &SA5_access},
 223         {0x21CE103C, "Smart HBA", &SA5_access},
 224         {0x05809005, "SmartHBA-SA", &SA5_access},
 225         {0x05819005, "SmartHBA-SA 8i", &SA5_access},
 226         {0x05829005, "SmartHBA-SA 8i8e", &SA5_access},
 227         {0x05839005, "SmartHBA-SA 8e", &SA5_access},
 228         {0x05849005, "SmartHBA-SA 16i", &SA5_access},
 229         {0x05859005, "SmartHBA-SA 4i4e", &SA5_access},
 230         {0x00761590, "HP Storage P1224 Array Controller", &SA5_access},
 231         {0x00871590, "HP Storage P1224e Array Controller", &SA5_access},
 232         {0x007D1590, "HP Storage P1228 Array Controller", &SA5_access},
 233         {0x00881590, "HP Storage P1228e Array Controller", &SA5_access},
 234         {0x333f103c, "HP StorageWorks 1210m Array Controller", &SA5_access},
 235         {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 236 };
 237
 238 static struct scsi_transport_template *hpsa_sas_transport_template;
 239 static int hpsa_add_sas_host(struct ctlr_info *h);
 240 static void hpsa_delete_sas_host(struct ctlr_info *h);
 241 static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
 242                         struct hpsa_scsi_dev_t *device);
 243 static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device);
 244 static struct hpsa_scsi_dev_t
 245         *hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
 246                 struct sas_rphy *rphy);
 247
 248 #define SCSI_CMD_BUSY ((struct scsi_cmnd *)&hpsa_cmd_busy)
 249 static const struct scsi_cmnd hpsa_cmd_busy;
 250 #define SCSI_CMD_IDLE ((struct scsi_cmnd *)&hpsa_cmd_idle)
 251 static const struct scsi_cmnd hpsa_cmd_idle;
 252 static int number_of_controllers;
 253
 254 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
 255 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
 256 static int hpsa_ioctl(struct scsi_device *dev, unsigned int cmd,
 257                       void __user *arg);
 258
 259 #ifdef CONFIG_COMPAT
 260 static int hpsa_compat_ioctl(struct scsi_device *dev, unsigned int cmd,
 261         void __user *arg);
 262 #endif
 263
 264 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 265 static struct CommandList *cmd_alloc(struct ctlr_info *h);
 266 static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c);
 267 static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
 268                                             struct scsi_cmnd *scmd);
 269 static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 270         void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
 271         int cmd_type);
 272 static void hpsa_free_cmd_pool(struct ctlr_info *h);
 273 #define VPD_PAGE (1 << 8)
 274 #define HPSA_SIMPLE_ERROR_BITS 0x03
 275
 276 static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 277 static void hpsa_scan_start(struct Scsi_Host *);
 278 static int hpsa_scan_finished(struct Scsi_Host *sh,
 279         unsigned long elapsed_time);
 280 static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth);
 281
 282 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 283 static int hpsa_slave_alloc(struct scsi_device *sdev);
 284 static int hpsa_slave_configure(struct scsi_device *sdev);
 285 static void hpsa_slave_destroy(struct scsi_device *sdev);
 286
 287 static void hpsa_update_scsi_devices(struct ctlr_info *h);
 288 static int check_for_unit_attention(struct ctlr_info *h,
 289         struct CommandList *c);
 290 static void check_ioctl_unit_attention(struct ctlr_info *h,
 291         struct CommandList *c);
 292 /* performant mode helper functions */
 293 static void calc_bucket_map(int *bucket, int num_buckets,
 294         int nsgs, int min_blocks, u32 *bucket_map);
 295 static void hpsa_free_performant_mode(struct ctlr_info *h);
 296 static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 297 static inline u32 next_command(struct ctlr_info *h, u8 q);
 298 static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
 299                                u32 *cfg_base_addr, u64 *cfg_base_addr_index,
 300                                u64 *cfg_offset);
 301 static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
 302                                     unsigned long *memory_bar);
 303 static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id,
 304                                 bool *legacy_board);
 305 static int wait_for_device_to_become_ready(struct ctlr_info *h,
 306                                            unsigned char lunaddr[],
 307                                            int reply_queue);
 308 static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
 309                                      int wait_for_ready);
 310 static inline void finish_cmd(struct CommandList *c);
 311 static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h);
 312 #define BOARD_NOT_READY 0
 313 #define BOARD_READY 1
 314 static void hpsa_drain_accel_commands(struct ctlr_info *h);
 315 static void hpsa_flush_cache(struct ctlr_info *h);
 316 static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
 317         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
 318         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk);
 319 static void hpsa_command_resubmit_worker(struct work_struct *work);
 320 static u32 lockup_detected(struct ctlr_info *h);
 321 static int detect_controller_lockup(struct ctlr_info *h);
 322 static void hpsa_disable_rld_caching(struct ctlr_info *h);
 323 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
 324         struct ReportExtendedLUNdata *buf, int bufsize);
 325 static bool hpsa_vpd_page_supported(struct ctlr_info *h,
 326         unsigned char scsi3addr[], u8 page);
 327 static int hpsa_luns_changed(struct ctlr_info *h);
 328 static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
 329                                struct hpsa_scsi_dev_t *dev,
 330                                unsigned char *scsi3addr);
 331
 332 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 333 {
 334         unsigned long *priv = shost_priv(sdev->host);
 335         return (struct ctlr_info *) *priv;
 336 }
 337
 338 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 339 {
 340         unsigned long *priv = shost_priv(sh);
 341         return (struct ctlr_info *) *priv;
 342 }
 343
 344 static inline bool hpsa_is_cmd_idle(struct CommandList *c)
 345 {
 346         return c->scsi_cmd == SCSI_CMD_IDLE;
 347 }
 348
 349 /* extract sense key, asc, and ascq from sense data.  -1 means invalid. */
 350 static void decode_sense_data(const u8 *sense_data, int sense_data_len,
 351                         u8 *sense_key, u8 *asc, u8 *ascq)
 352 {
 353         struct scsi_sense_hdr sshdr;
 354         bool rc;
 355
 356         *sense_key = -1;
 357         *asc = -1;
 358         *ascq = -1;
 359
 360         if (sense_data_len < 1)
 361                 return;
 362
 363         rc = scsi_normalize_sense(sense_data, sense_data_len, &sshdr);
 364         if (rc) {
 365                 *sense_key = sshdr.sense_key;
 366                 *asc = sshdr.asc;
 367                 *ascq = sshdr.ascq;
 368         }
 369 }
 370
 371 static int check_for_unit_attention(struct ctlr_info *h,
 372         struct CommandList *c)
 373 {
 374         u8 sense_key, asc, ascq;
 375         int sense_len;
 376
 377         if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
 378                 sense_len = sizeof(c->err_info->SenseInfo);
 379         else
 380                 sense_len = c->err_info->SenseLen;
 381
 382         decode_sense_data(c->err_info->SenseInfo, sense_len,
 383                                 &sense_key, &asc, &ascq);
 384         if (sense_key != UNIT_ATTENTION || asc == 0xff)
 385                 return 0;
 386
 387         switch (asc) {
 388         case STATE_CHANGED:
 389                 dev_warn(&h->pdev->dev,
 390                         "%s: a state change detected, command retried\n",
 391                         h->devname);
 392                 break;
 393         case LUN_FAILED:
 394                 dev_warn(&h->pdev->dev,
 395                         "%s: LUN failure detected\n", h->devname);
 396                 break;
 397         case REPORT_LUNS_CHANGED:
 398                 dev_warn(&h->pdev->dev,
 399                         "%s: report LUN data changed\n", h->devname);
 400         /*
 401          * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
 402          * target (array) devices.
 403          */
 404                 break;
 405         case POWER_OR_RESET:
 406                 dev_warn(&h->pdev->dev,
 407                         "%s: a power on or device reset detected\n",
 408                         h->devname);
 409                 break;
 410         case UNIT_ATTENTION_CLEARED:
 411                 dev_warn(&h->pdev->dev,
 412                         "%s: unit attention cleared by another initiator\n",
 413                         h->devname);
 414                 break;
 415         default:
 416                 dev_warn(&h->pdev->dev,
 417                         "%s: unknown unit attention detected\n",
 418                         h->devname);
 419                 break;
 420         }
 421         return 1;
 422 }
 423
 424 static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
 425 {
 426         if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
 427                 (c->err_info->ScsiStatus != SAM_STAT_BUSY &&
 428                  c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
 429                 return 0;
 430         dev_warn(&h->pdev->dev, HPSA "device busy");
 431         return 1;
 432 }
 433
 434 static u32 lockup_detected(struct ctlr_info *h);
 435 static ssize_t host_show_lockup_detected(struct device *dev,
 436                 struct device_attribute *attr, char *buf)
 437 {
 438         int ld;
 439         struct ctlr_info *h;
 440         struct Scsi_Host *shost = class_to_shost(dev);
 441
 442         h = shost_to_hba(shost);
 443         ld = lockup_detected(h);
 444
 445         return sprintf(buf, "ld=%d\n", ld);
 446 }
 447
 448 static ssize_t host_store_hp_ssd_smart_path_status(struct device *dev,
 449                                          struct device_attribute *attr,
 450                                          const char *buf, size_t count)
 451 {
 452         int status, len;
 453         struct ctlr_info *h;
 454         struct Scsi_Host *shost = class_to_shost(dev);
 455         char tmpbuf[10];
 456
 457         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 458                 return -EACCES;
 459         len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
 460         strncpy(tmpbuf, buf, len);
 461         tmpbuf[len] = '\0';
 462         if (sscanf(tmpbuf, "%d", &status) != 1)
 463                 return -EINVAL;
 464         h = shost_to_hba(shost);
 465         h->acciopath_status = !!status;
 466         dev_warn(&h->pdev->dev,
 467                 "hpsa: HP SSD Smart Path %s via sysfs update.\n",
 468                 h->acciopath_status ? "enabled" : "disabled");
 469         return count;
 470 }
 471
 472 static ssize_t host_store_raid_offload_debug(struct device *dev,
 473                                          struct device_attribute *attr,
 474                                          const char *buf, size_t count)
 475 {
 476         int debug_level, len;
 477         struct ctlr_info *h;
 478         struct Scsi_Host *shost = class_to_shost(dev);
 479         char tmpbuf[10];
 480
 481         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 482                 return -EACCES;
 483         len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
 484         strncpy(tmpbuf, buf, len);
 485         tmpbuf[len] = '\0';
 486         if (sscanf(tmpbuf, "%d", &debug_level) != 1)
 487                 return -EINVAL;
 488         if (debug_level < 0)
 489                 debug_level = 0;
 490         h = shost_to_hba(shost);
 491         h->raid_offload_debug = debug_level;
 492         dev_warn(&h->pdev->dev, "hpsa: Set raid_offload_debug level = %d\n",
 493                 h->raid_offload_debug);
 494         return count;
 495 }
 496
 497 static ssize_t host_store_rescan(struct device *dev,
 498                                  struct device_attribute *attr,
 499                                  const char *buf, size_t count)
 500 {
 501         struct ctlr_info *h;
 502         struct Scsi_Host *shost = class_to_shost(dev);
 503         h = shost_to_hba(shost);
 504         hpsa_scan_start(h->scsi_host);
 505         return count;
 506 }
 507
 508 static ssize_t host_show_firmware_revision(struct device *dev,
 509              struct device_attribute *attr, char *buf)
 510 {
 511         struct ctlr_info *h;
 512         struct Scsi_Host *shost = class_to_shost(dev);
 513         unsigned char *fwrev;
 514
 515         h = shost_to_hba(shost);
 516         if (!h->hba_inquiry_data)
 517                 return 0;
 518         fwrev = &h->hba_inquiry_data[32];
 519         return snprintf(buf, 20, "%c%c%c%c\n",
 520                 fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
 521 }
 522
 523 static ssize_t host_show_commands_outstanding(struct device *dev,
 524              struct device_attribute *attr, char *buf)
 525 {
 526         struct Scsi_Host *shost = class_to_shost(dev);
 527         struct ctlr_info *h = shost_to_hba(shost);
 528
 529         return snprintf(buf, 20, "%d\n",
 530                         atomic_read(&h->commands_outstanding));
 531 }
 532
 533 static ssize_t host_show_transport_mode(struct device *dev,
 534         struct device_attribute *attr, char *buf)
 535 {
 536         struct ctlr_info *h;
 537         struct Scsi_Host *shost = class_to_shost(dev);
 538
 539         h = shost_to_hba(shost);
 540         return snprintf(buf, 20, "%s\n",
 541                 h->transMethod & CFGTBL_Trans_Performant ?
 542                         "performant" : "simple");
 543 }
 544
 545 static ssize_t host_show_hp_ssd_smart_path_status(struct device *dev,
 546         struct device_attribute *attr, char *buf)
 547 {
 548         struct ctlr_info *h;
 549         struct Scsi_Host *shost = class_to_shost(dev);
 550
 551         h = shost_to_hba(shost);
 552         return snprintf(buf, 30, "HP SSD Smart Path %s\n",
 553                 (h->acciopath_status == 1) ?  "enabled" : "disabled");
 554 }
 555
 556 /* List of controllers which cannot be hard reset on kexec with reset_devices */
 557 static u32 unresettable_controller[] = {
 558         0x324a103C, /* Smart Array P712m */
 559         0x324b103C, /* Smart Array P711m */
 560         0x3223103C, /* Smart Array P800 */
 561         0x3234103C, /* Smart Array P400 */
 562         0x3235103C, /* Smart Array P400i */
 563         0x3211103C, /* Smart Array E200i */
 564         0x3212103C, /* Smart Array E200 */
 565         0x3213103C, /* Smart Array E200i */
 566         0x3214103C, /* Smart Array E200i */
 567         0x3215103C, /* Smart Array E200i */
 568         0x3237103C, /* Smart Array E500 */
 569         0x323D103C, /* Smart Array P700m */
 570         0x40800E11, /* Smart Array 5i */
 571         0x409C0E11, /* Smart Array 6400 */
 572         0x409D0E11, /* Smart Array 6400 EM */
 573         0x40700E11, /* Smart Array 5300 */
 574         0x40820E11, /* Smart Array 532 */
 575         0x40830E11, /* Smart Array 5312 */
 576         0x409A0E11, /* Smart Array 641 */
 577         0x409B0E11, /* Smart Array 642 */
 578         0x40910E11, /* Smart Array 6i */
 579 };
 580
 581 /* List of controllers which cannot even be soft reset */
 582 static u32 soft_unresettable_controller[] = {
 583         0x40800E11, /* Smart Array 5i */
 584         0x40700E11, /* Smart Array 5300 */
 585         0x40820E11, /* Smart Array 532 */
 586         0x40830E11, /* Smart Array 5312 */
 587         0x409A0E11, /* Smart Array 641 */
 588         0x409B0E11, /* Smart Array 642 */
 589         0x40910E11, /* Smart Array 6i */
 590         /* Exclude 640x boards.  These are two pci devices in one slot
 591          * which share a battery backed cache module.  One controls the
 592          * cache, the other accesses the cache through the one that controls
 593          * it.  If we reset the one controlling the cache, the other will
 594          * likely not be happy.  Just forbid resetting this conjoined mess.
 595          * The 640x isn't really supported by hpsa anyway.
 596          */
 597         0x409C0E11, /* Smart Array 6400 */
 598         0x409D0E11, /* Smart Array 6400 EM */
 599 };
 600
 601 static int board_id_in_array(u32 a[], int nelems, u32 board_id)
 602 {
 603         int i;
 604
 605         for (i = 0; i < nelems; i++)
 606                 if (a[i] == board_id)
 607                         return 1;
 608         return 0;
 609 }
 610
 611 static int ctlr_is_hard_resettable(u32 board_id)
 612 {
 613         return !board_id_in_array(unresettable_controller,
 614                         ARRAY_SIZE(unresettable_controller), board_id);
 615 }
 616
 617 static int ctlr_is_soft_resettable(u32 board_id)
 618 {
 619         return !board_id_in_array(soft_unresettable_controller,
 620                         ARRAY_SIZE(soft_unresettable_controller), board_id);
 621 }
 622
 623 static int ctlr_is_resettable(u32 board_id)
 624 {
 625         return ctlr_is_hard_resettable(board_id) ||
 626                 ctlr_is_soft_resettable(board_id);
 627 }
 628
 629 static ssize_t host_show_resettable(struct device *dev,
 630         struct device_attribute *attr, char *buf)
 631 {
 632         struct ctlr_info *h;
 633         struct Scsi_Host *shost = class_to_shost(dev);
 634
 635         h = shost_to_hba(shost);
 636         return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
 637 }
 638
 639 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 640 {
 641         return (scsi3addr[3] & 0xC0) == 0x40;
 642 }
 643
 644 static const char * const raid_label[] = { "0", "4", "1(+0)", "5", "5+1", "6",
 645         "1(+0)ADM", "UNKNOWN", "PHYS DRV"
 646 };
 647 #define HPSA_RAID_0     0
 648 #define HPSA_RAID_4     1
 649 #define HPSA_RAID_1     2       /* also used for RAID 10 */
 650 #define HPSA_RAID_5     3       /* also used for RAID 50 */
 651 #define HPSA_RAID_51    4
 652 #define HPSA_RAID_6     5       /* also used for RAID 60 */
 653 #define HPSA_RAID_ADM   6       /* also used for RAID 1+0 ADM */
 654 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 2)
 655 #define PHYSICAL_DRIVE (ARRAY_SIZE(raid_label) - 1)
 656
 657 static inline bool is_logical_device(struct hpsa_scsi_dev_t *device)
 658 {
 659         return !device->physical_device;
 660 }
 661
 662 static ssize_t raid_level_show(struct device *dev,
 663              struct device_attribute *attr, char *buf)
 664 {
 665         ssize_t l = 0;
 666         unsigned char rlevel;
 667         struct ctlr_info *h;
 668         struct scsi_device *sdev;
 669         struct hpsa_scsi_dev_t *hdev;
 670         unsigned long flags;
 671
 672         sdev = to_scsi_device(dev);
 673         h = sdev_to_hba(sdev);
 674         spin_lock_irqsave(&h->lock, flags);
 675         hdev = sdev->hostdata;
 676         if (!hdev) {
 677                 spin_unlock_irqrestore(&h->lock, flags);
 678                 return -ENODEV;
 679         }
 680
 681         /* Is this even a logical drive? */
 682         if (!is_logical_device(hdev)) {
 683                 spin_unlock_irqrestore(&h->lock, flags);
 684                 l = snprintf(buf, PAGE_SIZE, "N/A\n");
 685                 return l;
 686         }
 687
 688         rlevel = hdev->raid_level;
 689         spin_unlock_irqrestore(&h->lock, flags);
 690         if (rlevel > RAID_UNKNOWN)
 691                 rlevel = RAID_UNKNOWN;
 692         l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 693         return l;
 694 }
 695
 696 static ssize_t lunid_show(struct device *dev,
 697              struct device_attribute *attr, char *buf)
 698 {
 699         struct ctlr_info *h;
 700         struct scsi_device *sdev;
 701         struct hpsa_scsi_dev_t *hdev;
 702         unsigned long flags;
 703         unsigned char lunid[8];
 704
 705         sdev = to_scsi_device(dev);
 706         h = sdev_to_hba(sdev);
 707         spin_lock_irqsave(&h->lock, flags);
 708         hdev = sdev->hostdata;
 709         if (!hdev) {
 710                 spin_unlock_irqrestore(&h->lock, flags);
 711                 return -ENODEV;
 712         }
 713         memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 714         spin_unlock_irqrestore(&h->lock, flags);
 715         return snprintf(buf, 20, "0x%8phN\n", lunid);
 716 }
 717
 718 static ssize_t unique_id_show(struct device *dev,
 719              struct device_attribute *attr, char *buf)
 720 {
 721         struct ctlr_info *h;
 722         struct scsi_device *sdev;
 723         struct hpsa_scsi_dev_t *hdev;
 724         unsigned long flags;
 725         unsigned char sn[16];
 726
 727         sdev = to_scsi_device(dev);
 728         h = sdev_to_hba(sdev);
 729         spin_lock_irqsave(&h->lock, flags);
 730         hdev = sdev->hostdata;
 731         if (!hdev) {
 732                 spin_unlock_irqrestore(&h->lock, flags);
 733                 return -ENODEV;
 734         }
 735         memcpy(sn, hdev->device_id, sizeof(sn));
 736         spin_unlock_irqrestore(&h->lock, flags);
 737         return snprintf(buf, 16 * 2 + 2,
 738                         "%02X%02X%02X%02X%02X%02X%02X%02X"
 739                         "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 740                         sn[0], sn[1], sn[2], sn[3],
 741                         sn[4], sn[5], sn[6], sn[7],
 742                         sn[8], sn[9], sn[10], sn[11],
 743                         sn[12], sn[13], sn[14], sn[15]);
 744 }
 745
 746 static ssize_t sas_address_show(struct device *dev,
 747               struct device_attribute *attr, char *buf)
 748 {
 749         struct ctlr_info *h;
 750         struct scsi_device *sdev;
 751         struct hpsa_scsi_dev_t *hdev;
 752         unsigned long flags;
 753         u64 sas_address;
 754
 755         sdev = to_scsi_device(dev);
 756         h = sdev_to_hba(sdev);
 757         spin_lock_irqsave(&h->lock, flags);
 758         hdev = sdev->hostdata;
 759         if (!hdev || is_logical_device(hdev) || !hdev->expose_device) {
 760                 spin_unlock_irqrestore(&h->lock, flags);
 761                 return -ENODEV;
 762         }
 763         sas_address = hdev->sas_address;
 764         spin_unlock_irqrestore(&h->lock, flags);
 765
 766         return snprintf(buf, PAGE_SIZE, "0x%016llx\n", sas_address);
 767 }
 768
 769 static ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
 770              struct device_attribute *attr, char *buf)
 771 {
 772         struct ctlr_info *h;
 773         struct scsi_device *sdev;
 774         struct hpsa_scsi_dev_t *hdev;
 775         unsigned long flags;
 776         int offload_enabled;
 777
 778         sdev = to_scsi_device(dev);
 779         h = sdev_to_hba(sdev);
 780         spin_lock_irqsave(&h->lock, flags);
 781         hdev = sdev->hostdata;
 782         if (!hdev) {
 783                 spin_unlock_irqrestore(&h->lock, flags);
 784                 return -ENODEV;
 785         }
 786         offload_enabled = hdev->offload_enabled;
 787         spin_unlock_irqrestore(&h->lock, flags);
 788
 789         if (hdev->devtype == TYPE_DISK || hdev->devtype == TYPE_ZBC)
 790                 return snprintf(buf, 20, "%d\n", offload_enabled);
 791         else
 792                 return snprintf(buf, 40, "%s\n",
 793                                 "Not applicable for a controller");
 794 }
 795
 796 #define MAX_PATHS 8
 797 static ssize_t path_info_show(struct device *dev,
 798              struct device_attribute *attr, char *buf)
 799 {
 800         struct ctlr_info *h;
 801         struct scsi_device *sdev;
 802         struct hpsa_scsi_dev_t *hdev;
 803         unsigned long flags;
 804         int i;
 805         int output_len = 0;
 806         u8 box;
 807         u8 bay;
 808         u8 path_map_index = 0;
 809         char *active;
 810         unsigned char phys_connector[2];
 811
 812         sdev = to_scsi_device(dev);
 813         h = sdev_to_hba(sdev);
 814         spin_lock_irqsave(&h->devlock, flags);
 815         hdev = sdev->hostdata;
 816         if (!hdev) {
 817                 spin_unlock_irqrestore(&h->devlock, flags);
 818                 return -ENODEV;
 819         }
 820
 821         bay = hdev->bay;
 822         for (i = 0; i < MAX_PATHS; i++) {
 823                 path_map_index = 1<<i;
 824                 if (i == hdev->active_path_index)
 825                         active = "Active";
 826                 else if (hdev->path_map & path_map_index)
 827                         active = "Inactive";
 828                 else
 829                         continue;
 830
 831                 output_len += scnprintf(buf + output_len,
 832                                 PAGE_SIZE - output_len,
 833                                 "[%d:%d:%d:%d] %20.20s ",
 834                                 h->scsi_host->host_no,
 835                                 hdev->bus, hdev->target, hdev->lun,
 836                                 scsi_device_type(hdev->devtype));
 837
 838                 if (hdev->devtype == TYPE_RAID || is_logical_device(hdev)) {
 839                         output_len += scnprintf(buf + output_len,
 840                                                 PAGE_SIZE - output_len,
 841                                                 "%s\n", active);
 842                         continue;
 843                 }
 844
 845                 box = hdev->box[i];
 846                 memcpy(&phys_connector, &hdev->phys_connector[i],
 847                         sizeof(phys_connector));
 848                 if (phys_connector[0] < '0')
 849                         phys_connector[0] = '0';
 850                 if (phys_connector[1] < '0')
 851                         phys_connector[1] = '0';
 852                 output_len += scnprintf(buf + output_len,
 853                                 PAGE_SIZE - output_len,
 854                                 "PORT: %.2s ",
 855                                 phys_connector);
 856                 if ((hdev->devtype == TYPE_DISK || hdev->devtype == TYPE_ZBC) &&
 857                         hdev->expose_device) {
 858                         if (box == 0 || box == 0xFF) {
 859                                 output_len += scnprintf(buf + output_len,
 860                                         PAGE_SIZE - output_len,
 861                                         "BAY: %hhu %s\n",
 862                                         bay, active);
 863                         } else {
 864                                 output_len += scnprintf(buf + output_len,
 865                                         PAGE_SIZE - output_len,
 866                                         "BOX: %hhu BAY: %hhu %s\n",
 867                                         box, bay, active);
 868                         }
 869                 } else if (box != 0 && box != 0xFF) {
 870                         output_len += scnprintf(buf + output_len,
 871                                 PAGE_SIZE - output_len, "BOX: %hhu %s\n",
 872                                 box, active);
 873                 } else
 874                         output_len += scnprintf(buf + output_len,
 875                                 PAGE_SIZE - output_len, "%s\n", active);
 876         }
 877
 878         spin_unlock_irqrestore(&h->devlock, flags);
 879         return output_len;
 880 }
 881
 882 static ssize_t host_show_ctlr_num(struct device *dev,
 883         struct device_attribute *attr, char *buf)
 884 {
 885         struct ctlr_info *h;
 886         struct Scsi_Host *shost = class_to_shost(dev);
 887
 888         h = shost_to_hba(shost);
 889         return snprintf(buf, 20, "%d\n", h->ctlr);
 890 }
 891
 892 static ssize_t host_show_legacy_board(struct device *dev,
 893         struct device_attribute *attr, char *buf)
 894 {
 895         struct ctlr_info *h;
 896         struct Scsi_Host *shost = class_to_shost(dev);
 897
 898         h = shost_to_hba(shost);
 899         return snprintf(buf, 20, "%d\n", h->legacy_board ? 1 : 0);
 900 }
 901
 902 static DEVICE_ATTR_RO(raid_level);
 903 static DEVICE_ATTR_RO(lunid);
 904 static DEVICE_ATTR_RO(unique_id);
 905 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 906 static DEVICE_ATTR_RO(sas_address);
 907 static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
 908                         host_show_hp_ssd_smart_path_enabled, NULL);
 909 static DEVICE_ATTR_RO(path_info);
 910 static DEVICE_ATTR(hp_ssd_smart_path_status, S_IWUSR|S_IRUGO|S_IROTH,
 911                 host_show_hp_ssd_smart_path_status,
 912                 host_store_hp_ssd_smart_path_status);
 913 static DEVICE_ATTR(raid_offload_debug, S_IWUSR, NULL,
 914                         host_store_raid_offload_debug);
 915 static DEVICE_ATTR(firmware_revision, S_IRUGO,
 916         host_show_firmware_revision, NULL);
 917 static DEVICE_ATTR(commands_outstanding, S_IRUGO,
 918         host_show_commands_outstanding, NULL);
 919 static DEVICE_ATTR(transport_mode, S_IRUGO,
 920         host_show_transport_mode, NULL);
 921 static DEVICE_ATTR(resettable, S_IRUGO,
 922         host_show_resettable, NULL);
 923 static DEVICE_ATTR(lockup_detected, S_IRUGO,
 924         host_show_lockup_detected, NULL);
 925 static DEVICE_ATTR(ctlr_num, S_IRUGO,
 926         host_show_ctlr_num, NULL);
 927 static DEVICE_ATTR(legacy_board, S_IRUGO,
 928         host_show_legacy_board, NULL);
 929
 930 static struct device_attribute *hpsa_sdev_attrs[] = {
 931         &dev_attr_raid_level,
 932         &dev_attr_lunid,
 933         &dev_attr_unique_id,
 934         &dev_attr_hp_ssd_smart_path_enabled,
 935         &dev_attr_path_info,
 936         &dev_attr_sas_address,
 937         NULL,
 938 };
 939
 940 static struct device_attribute *hpsa_shost_attrs[] = {
 941         &dev_attr_rescan,
 942         &dev_attr_firmware_revision,
 943         &dev_attr_commands_outstanding,
 944         &dev_attr_transport_mode,
 945         &dev_attr_resettable,
 946         &dev_attr_hp_ssd_smart_path_status,
 947         &dev_attr_raid_offload_debug,
 948         &dev_attr_lockup_detected,
 949         &dev_attr_ctlr_num,
 950         &dev_attr_legacy_board,
 951         NULL,
 952 };
 953
 954 #define HPSA_NRESERVED_CMDS     (HPSA_CMDS_RESERVED_FOR_DRIVER +\
 955                                  HPSA_MAX_CONCURRENT_PASSTHRUS)
 956
 957 static struct scsi_host_template hpsa_driver_template = {
 958         .module                 = THIS_MODULE,
 959         .name                   = HPSA,
 960         .proc_name              = HPSA,
 961         .queuecommand           = hpsa_scsi_queue_command,
 962         .scan_start             = hpsa_scan_start,
 963         .scan_finished          = hpsa_scan_finished,
 964         .change_queue_depth     = hpsa_change_queue_depth,
 965         .this_id                = -1,
 966         .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 967         .ioctl                  = hpsa_ioctl,
 968         .slave_alloc            = hpsa_slave_alloc,
 969         .slave_configure        = hpsa_slave_configure,
 970         .slave_destroy          = hpsa_slave_destroy,
 971 #ifdef CONFIG_COMPAT
 972         .compat_ioctl           = hpsa_compat_ioctl,
 973 #endif
 974         .sdev_attrs = hpsa_sdev_attrs,
 975         .shost_attrs = hpsa_shost_attrs,
 976         .max_sectors = 2048,
 977         .no_write_same = 1,
 978 };
 979
 980 static inline u32 next_command(struct ctlr_info *h, u8 q)
 981 {
 982         u32 a;
 983         struct reply_queue_buffer *rq = &h->reply_queue[q];
 984
 985         if (h->transMethod & CFGTBL_Trans_io_accel1)
 986                 return h->access.command_completed(h, q);
 987
 988         if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
 989                 return h->access.command_completed(h, q);
 990
 991         if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
 992                 a = rq->head[rq->current_entry];
 993                 rq->current_entry++;
 994                 atomic_dec(&h->commands_outstanding);
 995         } else {
 996                 a = FIFO_EMPTY;
 997         }
 998         /* Check for wraparound */
 999         if (rq->current_entry == h->max_commands) {
1000                 rq->current_entry = 0;
1001                 rq->wraparound ^= 1;
1002         }
1003         return a;
1004 }
1005
1006 /*
1007  * There are some special bits in the bus address of the
1008  * command that we have to set for the controller to know
1009  * how to process the command:
1010  *
1011  * Normal performant mode:
1012  * bit 0: 1 means performant mode, 0 means simple mode.
1013  * bits 1-3 = block fetch table entry
1014  * bits 4-6 = command type (== 0)
1015  *
1016  * ioaccel1 mode:
1017  * bit 0 = "performant mode" bit.
1018  * bits 1-3 = block fetch table entry
1019  * bits 4-6 = command type (== 110)
1020  * (command type is needed because ioaccel1 mode
1021  * commands are submitted through the same register as normal
1022  * mode commands, so this is how the controller knows whether
1023  * the command is normal mode or ioaccel1 mode.)
1024  *
1025  * ioaccel2 mode:
1026  * bit 0 = "performant mode" bit.
1027  * bits 1-4 = block fetch table entry (note extra bit)
1028  * bits 4-6 = not needed, because ioaccel2 mode has
1029  * a separate special register for submitting commands.
1030  */
1031
1032 /*
1033  * set_performant_mode: Modify the tag for cciss performant
1034  * set bit 0 for pull model, bits 3-1 for block fetch
1035  * register number
1036  */
1037 #define DEFAULT_REPLY_QUEUE (-1)
1038 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
1039                                         int reply_queue)
1040 {
1041         if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
1042                 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
1043                 if (unlikely(!h->msix_vectors))
1044                         return;
1045                 c->Header.ReplyQueue = reply_queue;
1046         }
1047 }
1048
1049 static void set_ioaccel1_performant_mode(struct ctlr_info *h,
1050                                                 struct CommandList *c,
1051                                                 int reply_queue)
1052 {
1053         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
1054
1055         /*
1056          * Tell the controller to post the reply to the queue for this
1057          * processor.  This seems to give the best I/O throughput.
1058          */
1059         cp->ReplyQueue = reply_queue;
1060         /*
1061          * Set the bits in the address sent down to include:
1062          *  - performant mode bit (bit 0)
1063          *  - pull count (bits 1-3)
1064          *  - command type (bits 4-6)
1065          */
1066         c->busaddr |= 1 | (h->ioaccel1_blockFetchTable[c->Header.SGList] << 1) |
1067                                         IOACCEL1_BUSADDR_CMDTYPE;
1068 }
1069
1070 static void set_ioaccel2_tmf_performant_mode(struct ctlr_info *h,
1071                                                 struct CommandList *c,
1072                                                 int reply_queue)
1073 {
1074         struct hpsa_tmf_struct *cp = (struct hpsa_tmf_struct *)
1075                 &h->ioaccel2_cmd_pool[c->cmdindex];
1076
1077         /* Tell the controller to post the reply to the queue for this
1078          * processor.  This seems to give the best I/O throughput.
1079          */
1080         cp->reply_queue = reply_queue;
1081         /* Set the bits in the address sent down to include:
1082          *  - performant mode bit not used in ioaccel mode 2
1083          *  - pull count (bits 0-3)
1084          *  - command type isn't needed for ioaccel2
1085          */
1086         c->busaddr |= h->ioaccel2_blockFetchTable[0];
1087 }
1088
1089 static void set_ioaccel2_performant_mode(struct ctlr_info *h,
1090                                                 struct CommandList *c,
1091                                                 int reply_queue)
1092 {
1093         struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
1094
1095         /*
1096          * Tell the controller to post the reply to the queue for this
1097          * processor.  This seems to give the best I/O throughput.
1098          */
1099         cp->reply_queue = reply_queue;
1100         /*
1101          * Set the bits in the address sent down to include:
1102          *  - performant mode bit not used in ioaccel mode 2
1103          *  - pull count (bits 0-3)
1104          *  - command type isn't needed for ioaccel2
1105          */
1106         c->busaddr |= (h->ioaccel2_blockFetchTable[cp->sg_count]);
1107 }
1108
1109 static int is_firmware_flash_cmd(u8 *cdb)
1110 {
1111         return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
1112 }
1113
1114 /*
1115  * During firmware flash, the heartbeat register may not update as frequently
1116  * as it should.  So we dial down lockup detection during firmware flash. and
1117  * dial it back up when firmware flash completes.
1118  */
1119 #define HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH (240 * HZ)
1120 #define HEARTBEAT_SAMPLE_INTERVAL (30 * HZ)
1121 #define HPSA_EVENT_MONITOR_INTERVAL (15 * HZ)
1122 static void dial_down_lockup_detection_during_fw_flash(struct ctlr_info *h,
1123                 struct CommandList *c)
1124 {
1125         if (!is_firmware_flash_cmd(c->Request.CDB))
1126                 return;
1127         atomic_inc(&h->firmware_flash_in_progress);
1128         h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH;
1129 }
1130
1131 static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
1132                 struct CommandList *c)
1133 {
1134         if (is_firmware_flash_cmd(c->Request.CDB) &&
1135                 atomic_dec_and_test(&h->firmware_flash_in_progress))
1136                 h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
1137 }
1138
1139 static void __enqueue_cmd_and_start_io(struct ctlr_info *h,
1140         struct CommandList *c, int reply_queue)
1141 {
1142         dial_down_lockup_detection_during_fw_flash(h, c);
1143         atomic_inc(&h->commands_outstanding);
1144         if (c->device)
1145                 atomic_inc(&c->device->commands_outstanding);
1146
1147         reply_queue = h->reply_map[raw_smp_processor_id()];
1148         switch (c->cmd_type) {
1149         case CMD_IOACCEL1:
1150                 set_ioaccel1_performant_mode(h, c, reply_queue);
1151                 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
1152                 break;
1153         case CMD_IOACCEL2:
1154                 set_ioaccel2_performant_mode(h, c, reply_queue);
1155                 writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1156                 break;
1157         case IOACCEL2_TMF:
1158                 set_ioaccel2_tmf_performant_mode(h, c, reply_queue);
1159                 writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1160                 break;
1161         default:
1162                 set_performant_mode(h, c, reply_queue);
1163                 h->access.submit_command(h, c);
1164         }
1165 }
1166
1167 static void enqueue_cmd_and_start_io(struct ctlr_info *h, struct CommandList *c)
1168 {
1169         __enqueue_cmd_and_start_io(h, c, DEFAULT_REPLY_QUEUE);
1170 }
1171
1172 static inline int is_hba_lunid(unsigned char scsi3addr[])
1173 {
1174         return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
1175 }
1176
1177 static inline int is_scsi_rev_5(struct ctlr_info *h)
1178 {
1179         if (!h->hba_inquiry_data)
1180                 return 0;
1181         if ((h->hba_inquiry_data[2] & 0x07) == 5)
1182                 return 1;
1183         return 0;
1184 }
1185
1186 static int hpsa_find_target_lun(struct ctlr_info *h,
1187         unsigned char scsi3addr[], int bus, int *target, int *lun)
1188 {
1189         /* finds an unused bus, target, lun for a new physical device
1190          * assumes h->devlock is held
1191          */
1192         int i, found = 0;
1193         DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
1194
1195         bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
1196
1197         for (i = 0; i < h->ndevices; i++) {
1198                 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
1199                         __set_bit(h->dev[i]->target, lun_taken);
1200         }
1201
1202         i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
1203         if (i < HPSA_MAX_DEVICES) {
1204                 /* *bus = 1; */
1205                 *target = i;
1206                 *lun = 0;
1207                 found = 1;
1208         }
1209         return !found;
1210 }
1211
1212 static void hpsa_show_dev_msg(const char *level, struct ctlr_info *h,
1213         struct hpsa_scsi_dev_t *dev, char *description)
1214 {
1215 #define LABEL_SIZE 25
1216         char label[LABEL_SIZE];
1217
1218         if (h == NULL || h->pdev == NULL || h->scsi_host == NULL)
1219                 return;
1220
1221         switch (dev->devtype) {
1222         case TYPE_RAID:
1223                 snprintf(label, LABEL_SIZE, "controller");
1224                 break;
1225         case TYPE_ENCLOSURE:
1226                 snprintf(label, LABEL_SIZE, "enclosure");
1227                 break;
1228         case TYPE_DISK:
1229         case TYPE_ZBC:
1230                 if (dev->external)
1231                         snprintf(label, LABEL_SIZE, "external");
1232                 else if (!is_logical_dev_addr_mode(dev->scsi3addr))
1233                         snprintf(label, LABEL_SIZE, "%s",
1234                                 raid_label[PHYSICAL_DRIVE]);
1235                 else
1236                         snprintf(label, LABEL_SIZE, "RAID-%s",
1237                                 dev->raid_level > RAID_UNKNOWN ? "?" :
1238                                 raid_label[dev->raid_level]);
1239                 break;
1240         case TYPE_ROM:
1241                 snprintf(label, LABEL_SIZE, "rom");
1242                 break;
1243         case TYPE_TAPE:
1244                 snprintf(label, LABEL_SIZE, "tape");
1245                 break;
1246         case TYPE_MEDIUM_CHANGER:
1247                 snprintf(label, LABEL_SIZE, "changer");
1248                 break;
1249         default:
1250                 snprintf(label, LABEL_SIZE, "UNKNOWN");
1251                 break;
1252         }
1253
1254         dev_printk(level, &h->pdev->dev,
1255                         "scsi %d:%d:%d:%d: %s %s %.8s %.16s %s SSDSmartPathCap%c En%c Exp=%d\n",
1256                         h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
1257                         description,
1258                         scsi_device_type(dev->devtype),
1259                         dev->vendor,
1260                         dev->model,
1261                         label,
1262                         dev->offload_config ? '+' : '-',
1263                         dev->offload_to_be_enabled ? '+' : '-',
1264                         dev->expose_device);
1265 }
1266
1267 /* Add an entry into h->dev[] array. */
1268 static int hpsa_scsi_add_entry(struct ctlr_info *h,
1269                 struct hpsa_scsi_dev_t *device,
1270                 struct hpsa_scsi_dev_t *added[], int *nadded)
1271 {
1272         /* assumes h->devlock is held */
1273         int n = h->ndevices;
1274         int i;
1275         unsigned char addr1[8], addr2[8];
1276         struct hpsa_scsi_dev_t *sd;
1277
1278         if (n >= HPSA_MAX_DEVICES) {
1279                 dev_err(&h->pdev->dev, "too many devices, some will be "
1280                         "inaccessible.\n");
1281                 return -1;
1282         }
1283
1284         /* physical devices do not have lun or target assigned until now. */
1285         if (device->lun != -1)
1286                 /* Logical device, lun is already assigned. */
1287                 goto lun_assigned;
1288
1289         /* If this device a non-zero lun of a multi-lun device
1290          * byte 4 of the 8-byte LUN addr will contain the logical
1291          * unit no, zero otherwise.
1292          */
1293         if (device->scsi3addr[4] == 0) {
1294                 /* This is not a non-zero lun of a multi-lun device */
1295                 if (hpsa_find_target_lun(h, device->scsi3addr,
1296                         device->bus, &device->target, &device->lun) != 0)
1297                         return -1;
1298                 goto lun_assigned;
1299         }
1300
1301         /* This is a non-zero lun of a multi-lun device.
1302          * Search through our list and find the device which
1303          * has the same 8 byte LUN address, excepting byte 4 and 5.
1304          * Assign the same bus and target for this new LUN.
1305          * Use the logical unit number from the firmware.
1306          */
1307         memcpy(addr1, device->scsi3addr, 8);
1308         addr1[4] = 0;
1309         addr1[5] = 0;
1310         for (i = 0; i < n; i++) {
1311                 sd = h->dev[i];
1312                 memcpy(addr2, sd->scsi3addr, 8);
1313                 addr2[4] = 0;
1314                 addr2[5] = 0;
1315                 /* differ only in byte 4 and 5? */
1316                 if (memcmp(addr1, addr2, 8) == 0) {
1317                         device->bus = sd->bus;
1318                         device->target = sd->target;
1319                         device->lun = device->scsi3addr[4];
1320                         break;
1321                 }
1322         }
1323         if (device->lun == -1) {
1324                 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
1325                         " suspect firmware bug or unsupported hardware "
1326                         "configuration.\n");
1327                 return -1;
1328         }
1329
1330 lun_assigned:
1331
1332         h->dev[n] = device;
1333         h->ndevices++;
1334         added[*nadded] = device;
1335         (*nadded)++;
1336         hpsa_show_dev_msg(KERN_INFO, h, device,
1337                 device->expose_device ? "added" : "masked");
1338         return 0;
1339 }
1340
1341 /*
1342  * Called during a scan operation.
1343  *
1344  * Update an entry in h->dev[] array.
1345  */
1346 static void hpsa_scsi_update_entry(struct ctlr_info *h,
1347         int entry, struct hpsa_scsi_dev_t *new_entry)
1348 {
1349         /* assumes h->devlock is held */
1350         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1351
1352         /* Raid level changed. */
1353         h->dev[entry]->raid_level = new_entry->raid_level;
1354
1355         /*
1356          * ioacccel_handle may have changed for a dual domain disk
1357          */
1358         h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
1359
1360         /* Raid offload parameters changed.  Careful about the ordering. */
1361         if (new_entry->offload_config && new_entry->offload_to_be_enabled) {
1362                 /*
1363                  * if drive is newly offload_enabled, we want to copy the
1364                  * raid map data first.  If previously offload_enabled and
1365                  * offload_config were set, raid map data had better be
1366                  * the same as it was before. If raid map data has changed
1367                  * then it had better be the case that
1368                  * h->dev[entry]->offload_enabled is currently 0.
1369                  */
1370                 h->dev[entry]->raid_map = new_entry->raid_map;
1371                 h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
1372         }
1373         if (new_entry->offload_to_be_enabled) {
1374                 h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
1375                 wmb(); /* set ioaccel_handle *before* hba_ioaccel_enabled */
1376         }
1377         h->dev[entry]->hba_ioaccel_enabled = new_entry->hba_ioaccel_enabled;
1378         h->dev[entry]->offload_config = new_entry->offload_config;
1379         h->dev[entry]->offload_to_mirror = new_entry->offload_to_mirror;
1380         h->dev[entry]->queue_depth = new_entry->queue_depth;
1381
1382         /*
1383          * We can turn off ioaccel offload now, but need to delay turning
1384          * ioaccel on until we can update h->dev[entry]->phys_disk[], but we
1385          * can't do that until all the devices are updated.
1386          */
1387         h->dev[entry]->offload_to_be_enabled = new_entry->offload_to_be_enabled;
1388
1389         /*
1390          * turn ioaccel off immediately if told to do so.
1391          */
1392         if (!new_entry->offload_to_be_enabled)
1393                 h->dev[entry]->offload_enabled = 0;
1394
1395         hpsa_show_dev_msg(KERN_INFO, h, h->dev[entry], "updated");
1396 }
1397
1398 /* Replace an entry from h->dev[] array. */
1399 static void hpsa_scsi_replace_entry(struct ctlr_info *h,
1400         int entry, struct hpsa_scsi_dev_t *new_entry,
1401         struct hpsa_scsi_dev_t *added[], int *nadded,
1402         struct hpsa_scsi_dev_t *removed[], int *nremoved)
1403 {
1404         /* assumes h->devlock is held */
1405         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1406         removed[*nremoved] = h->dev[entry];
1407         (*nremoved)++;
1408
1409         /*
1410          * New physical devices won't have target/lun assigned yet
1411          * so we need to preserve the values in the slot we are replacing.
1412          */
1413         if (new_entry->target == -1) {
1414                 new_entry->target = h->dev[entry]->target;
1415                 new_entry->lun = h->dev[entry]->lun;
1416         }
1417
1418         h->dev[entry] = new_entry;
1419         added[*nadded] = new_entry;
1420         (*nadded)++;
1421
1422         hpsa_show_dev_msg(KERN_INFO, h, new_entry, "replaced");
1423 }
1424
1425 /* Remove an entry from h->dev[] array. */
1426 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int entry,
1427         struct hpsa_scsi_dev_t *removed[], int *nremoved)
1428 {
1429         /* assumes h->devlock is held */
1430         int i;
1431         struct hpsa_scsi_dev_t *sd;
1432
1433         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1434
1435         sd = h->dev[entry];
1436         removed[*nremoved] = h->dev[entry];
1437         (*nremoved)++;
1438
1439         for (i = entry; i < h->ndevices-1; i++)
1440                 h->dev[i] = h->dev[i+1];
1441         h->ndevices--;
1442         hpsa_show_dev_msg(KERN_INFO, h, sd, "removed");
1443 }
1444
1445 #define SCSI3ADDR_EQ(a, b) ( \
1446         (a)[7] == (b)[7] && \
1447         (a)[6] == (b)[6] && \
1448         (a)[5] == (b)[5] && \
1449         (a)[4] == (b)[4] && \
1450         (a)[3] == (b)[3] && \
1451         (a)[2] == (b)[2] && \
1452         (a)[1] == (b)[1] && \
1453         (a)[0] == (b)[0])
1454
1455 static void fixup_botched_add(struct ctlr_info *h,
1456         struct hpsa_scsi_dev_t *added)
1457 {
1458         /* called when scsi_add_device fails in order to re-adjust
1459          * h->dev[] to match the mid layer's view.
1460          */
1461         unsigned long flags;
1462         int i, j;
1463
1464         spin_lock_irqsave(&h->lock, flags);
1465         for (i = 0; i < h->ndevices; i++) {
1466                 if (h->dev[i] == added) {
1467                         for (j = i; j < h->ndevices-1; j++)
1468                                 h->dev[j] = h->dev[j+1];
1469                         h->ndevices--;
1470                         break;
1471                 }
1472         }
1473         spin_unlock_irqrestore(&h->lock, flags);
1474         kfree(added);
1475 }
1476
1477 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
1478         struct hpsa_scsi_dev_t *dev2)
1479 {
1480         /* we compare everything except lun and target as these
1481          * are not yet assigned.  Compare parts likely
1482          * to differ first
1483          */
1484         if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
1485                 sizeof(dev1->scsi3addr)) != 0)
1486                 return 0;
1487         if (memcmp(dev1->device_id, dev2->device_id,
1488                 sizeof(dev1->device_id)) != 0)
1489                 return 0;
1490         if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
1491                 return 0;
1492         if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
1493                 return 0;
1494         if (dev1->devtype != dev2->devtype)
1495                 return 0;
1496         if (dev1->bus != dev2->bus)
1497                 return 0;
1498         return 1;
1499 }
1500
1501 static inline int device_updated(struct hpsa_scsi_dev_t *dev1,
1502         struct hpsa_scsi_dev_t *dev2)
1503 {
1504         /* Device attributes that can change, but don't mean
1505          * that the device is a different device, nor that the OS
1506          * needs to be told anything about the change.
1507          */
1508         if (dev1->raid_level != dev2->raid_level)
1509                 return 1;
1510         if (dev1->offload_config != dev2->offload_config)
1511                 return 1;
1512         if (dev1->offload_to_be_enabled != dev2->offload_to_be_enabled)
1513                 return 1;
1514         if (!is_logical_dev_addr_mode(dev1->scsi3addr))
1515                 if (dev1->queue_depth != dev2->queue_depth)
1516                         return 1;
1517         /*
1518          * This can happen for dual domain devices. An active
1519          * path change causes the ioaccel handle to change
1520          *
1521          * for example note the handle differences between p0 and p1
1522          * Device                    WWN               ,WWN hash,Handle
1523          * D016 p0|0x3 [02]P2E:01:01,0x5000C5005FC4DACA,0x9B5616,0x01030003
1524          *      p1                   0x5000C5005FC4DAC9,0x6798C0,0x00040004
1525          */
1526         if (dev1->ioaccel_handle != dev2->ioaccel_handle)
1527                 return 1;
1528         return 0;
1529 }
1530
1531 /* Find needle in haystack.  If exact match found, return DEVICE_SAME,
1532  * and return needle location in *index.  If scsi3addr matches, but not
1533  * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
1534  * location in *index.
1535  * In the case of a minor device attribute change, such as RAID level, just
1536  * return DEVICE_UPDATED, along with the updated device's location in index.
1537  * If needle not found, return DEVICE_NOT_FOUND.
1538  */
1539 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
1540         struct hpsa_scsi_dev_t *haystack[], int haystack_size,
1541         int *index)
1542 {
1543         int i;
1544 #define DEVICE_NOT_FOUND 0
1545 #define DEVICE_CHANGED 1
1546 #define DEVICE_SAME 2
1547 #define DEVICE_UPDATED 3
1548         if (needle == NULL)
1549                 return DEVICE_NOT_FOUND;
1550
1551         for (i = 0; i < haystack_size; i++) {
1552                 if (haystack[i] == NULL) /* previously removed. */
1553                         continue;
1554                 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
1555                         *index = i;
1556                         if (device_is_the_same(needle, haystack[i])) {
1557                                 if (device_updated(needle, haystack[i]))
1558                                         return DEVICE_UPDATED;
1559                                 return DEVICE_SAME;
1560                         } else {
1561                                 /* Keep offline devices offline */
1562                                 if (needle->volume_offline)
1563                                         return DEVICE_NOT_FOUND;
1564                                 return DEVICE_CHANGED;
1565                         }
1566                 }
1567         }
1568         *index = -1;
1569         return DEVICE_NOT_FOUND;
1570 }
1571
1572 static void hpsa_monitor_offline_device(struct ctlr_info *h,
1573                                         unsigned char scsi3addr[])
1574 {
1575         struct offline_device_entry *device;
1576         unsigned long flags;
1577
1578         /* Check to see if device is already on the list */
1579         spin_lock_irqsave(&h->offline_device_lock, flags);
1580         list_for_each_entry(device, &h->offline_device_list, offline_list) {
1581                 if (memcmp(device->scsi3addr, scsi3addr,
1582                         sizeof(device->scsi3addr)) == 0) {
1583                         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1584                         return;
1585                 }
1586         }
1587         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1588
1589         /* Device is not on the list, add it. */
1590         device = kmalloc(sizeof(*device), GFP_KERNEL);
1591         if (!device)
1592                 return;
1593
1594         memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1595         spin_lock_irqsave(&h->offline_device_lock, flags);
1596         list_add_tail(&device->offline_list, &h->offline_device_list);
1597         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1598 }
1599
1600 /* Print a message explaining various offline volume states */
1601 static void hpsa_show_volume_status(struct ctlr_info *h,
1602         struct hpsa_scsi_dev_t *sd)
1603 {
1604         if (sd->volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED)
1605                 dev_info(&h->pdev->dev,
1606                         "C%d:B%d:T%d:L%d Volume status is not available through vital product data pages.\n",
1607                         h->scsi_host->host_no,
1608                         sd->bus, sd->target, sd->lun);
1609         switch (sd->volume_offline) {
1610         case HPSA_LV_OK:
1611                 break;
1612         case HPSA_LV_UNDERGOING_ERASE:
1613                 dev_info(&h->pdev->dev,
1614                         "C%d:B%d:T%d:L%d Volume is undergoing background erase process.\n",
1615                         h->scsi_host->host_no,
1616                         sd->bus, sd->target, sd->lun);
1617                 break;
1618         case HPSA_LV_NOT_AVAILABLE:
1619                 dev_info(&h->pdev->dev,
1620                         "C%d:B%d:T%d:L%d Volume is waiting for transforming volume.\n",
1621                         h->scsi_host->host_no,
1622                         sd->bus, sd->target, sd->lun);
1623                 break;
1624         case HPSA_LV_UNDERGOING_RPI:
1625                 dev_info(&h->pdev->dev,
1626                         "C%d:B%d:T%d:L%d Volume is undergoing rapid parity init.\n",
1627                         h->scsi_host->host_no,
1628                         sd->bus, sd->target, sd->lun);
1629                 break;
1630         case HPSA_LV_PENDING_RPI:
1631                 dev_info(&h->pdev->dev,
1632                         "C%d:B%d:T%d:L%d Volume is queued for rapid parity initialization process.\n",
1633                         h->scsi_host->host_no,
1634                         sd->bus, sd->target, sd->lun);
1635                 break;
1636         case HPSA_LV_ENCRYPTED_NO_KEY:
1637                 dev_info(&h->pdev->dev,
1638                         "C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because key is not present.\n",
1639                         h->scsi_host->host_no,
1640                         sd->bus, sd->target, sd->lun);
1641                 break;
1642         case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
1643                 dev_info(&h->pdev->dev,
1644                         "C%d:B%d:T%d:L%d Volume is not encrypted and cannot be accessed because controller is in encryption-only mode.\n",
1645                         h->scsi_host->host_no,
1646                         sd->bus, sd->target, sd->lun);
1647                 break;
1648         case HPSA_LV_UNDERGOING_ENCRYPTION:
1649                 dev_info(&h->pdev->dev,
1650                         "C%d:B%d:T%d:L%d Volume is undergoing encryption process.\n",
1651                         h->scsi_host->host_no,
1652                         sd->bus, sd->target, sd->lun);
1653                 break;
1654         case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
1655                 dev_info(&h->pdev->dev,
1656                         "C%d:B%d:T%d:L%d Volume is undergoing encryption re-keying process.\n",
1657                         h->scsi_host->host_no,
1658                         sd->bus, sd->target, sd->lun);
1659                 break;
1660         case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1661                 dev_info(&h->pdev->dev,
1662                         "C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because controller does not have encryption enabled.\n",
1663                         h->scsi_host->host_no,
1664                         sd->bus, sd->target, sd->lun);
1665                 break;
1666         case HPSA_LV_PENDING_ENCRYPTION:
1667                 dev_info(&h->pdev->dev,
1668                         "C%d:B%d:T%d:L%d Volume is pending migration to encrypted state, but process has not started.\n",
1669                         h->scsi_host->host_no,
1670                         sd->bus, sd->target, sd->lun);
1671                 break;
1672         case HPSA_LV_PENDING_ENCRYPTION_REKEYING:
1673                 dev_info(&h->pdev->dev,
1674                         "C%d:B%d:T%d:L%d Volume is encrypted and is pending encryption rekeying.\n",
1675                         h->scsi_host->host_no,
1676                         sd->bus, sd->target, sd->lun);
1677                 break;
1678         }
1679 }
1680
1681 /*
1682  * Figure the list of physical drive pointers for a logical drive with
1683  * raid offload configured.
1684  */
1685 static void hpsa_figure_phys_disk_ptrs(struct ctlr_info *h,
1686                                 struct hpsa_scsi_dev_t *dev[], int ndevices,
1687                                 struct hpsa_scsi_dev_t *logical_drive)
1688 {
1689         struct raid_map_data *map = &logical_drive->raid_map;
1690         struct raid_map_disk_data *dd = &map->data[0];
1691         int i, j;
1692         int total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
1693                                 le16_to_cpu(map->metadata_disks_per_row);
1694         int nraid_map_entries = le16_to_cpu(map->row_cnt) *
1695                                 le16_to_cpu(map->layout_map_count) *
1696                                 total_disks_per_row;
1697         int nphys_disk = le16_to_cpu(map->layout_map_count) *
1698                                 total_disks_per_row;
1699         int qdepth;
1700
1701         if (nraid_map_entries > RAID_MAP_MAX_ENTRIES)
1702                 nraid_map_entries = RAID_MAP_MAX_ENTRIES;
1703
1704         logical_drive->nphysical_disks = nraid_map_entries;
1705
1706         qdepth = 0;
1707         for (i = 0; i < nraid_map_entries; i++) {
1708                 logical_drive->phys_disk[i] = NULL;
1709                 if (!logical_drive->offload_config)
1710                         continue;
1711                 for (j = 0; j < ndevices; j++) {
1712                         if (dev[j] == NULL)
1713                                 continue;
1714                         if (dev[j]->devtype != TYPE_DISK &&
1715                             dev[j]->devtype != TYPE_ZBC)
1716                                 continue;
1717                         if (is_logical_device(dev[j]))
1718                                 continue;
1719                         if (dev[j]->ioaccel_handle != dd[i].ioaccel_handle)
1720                                 continue;
1721
1722                         logical_drive->phys_disk[i] = dev[j];
1723                         if (i < nphys_disk)
1724                                 qdepth = min(h->nr_cmds, qdepth +
1725                                     logical_drive->phys_disk[i]->queue_depth);
1726                         break;
1727                 }
1728
1729                 /*
1730                  * This can happen if a physical drive is removed and
1731                  * the logical drive is degraded.  In that case, the RAID
1732                  * map data will refer to a physical disk which isn't actually
1733                  * present.  And in that case offload_enabled should already
1734                  * be 0, but we'll turn it off here just in case
1735                  */
1736                 if (!logical_drive->phys_disk[i]) {
1737                         dev_warn(&h->pdev->dev,
1738                                 "%s: [%d:%d:%d:%d] A phys disk component of LV is missing, turning off offload_enabled for LV.\n",
1739                                 __func__,
1740                                 h->scsi_host->host_no, logical_drive->bus,
1741                                 logical_drive->target, logical_drive->lun);
1742                         logical_drive->offload_enabled = 0;
1743                         logical_drive->offload_to_be_enabled = 0;
1744                         logical_drive->queue_depth = 8;
1745                 }
1746         }
1747         if (nraid_map_entries)
1748                 /*
1749                  * This is correct for reads, too high for full stripe writes,
1750                  * way too high for partial stripe writes
1751                  */
1752                 logical_drive->queue_depth = qdepth;
1753         else {
1754                 if (logical_drive->external)
1755                         logical_drive->queue_depth = EXTERNAL_QD;
1756                 else
1757                         logical_drive->queue_depth = h->nr_cmds;
1758         }
1759 }
1760
1761 static void hpsa_update_log_drive_phys_drive_ptrs(struct ctlr_info *h,
1762                                 struct hpsa_scsi_dev_t *dev[], int ndevices)
1763 {
1764         int i;
1765
1766         for (i = 0; i < ndevices; i++) {
1767                 if (dev[i] == NULL)
1768                         continue;
1769                 if (dev[i]->devtype != TYPE_DISK &&
1770                     dev[i]->devtype != TYPE_ZBC)
1771                         continue;
1772                 if (!is_logical_device(dev[i]))
1773                         continue;
1774
1775                 /*
1776                  * If offload is currently enabled, the RAID map and
1777                  * phys_disk[] assignment *better* not be changing
1778                  * because we would be changing ioaccel phsy_disk[] pointers
1779                  * on a ioaccel volume processing I/O requests.
1780                  *
1781                  * If an ioaccel volume status changed, initially because it was
1782                  * re-configured and thus underwent a transformation, or
1783                  * a drive failed, we would have received a state change
1784                  * request and ioaccel should have been turned off. When the
1785                  * transformation completes, we get another state change
1786                  * request to turn ioaccel back on. In this case, we need
1787                  * to update the ioaccel information.
1788                  *
1789                  * Thus: If it is not currently enabled, but will be after
1790                  * the scan completes, make sure the ioaccel pointers
1791                  * are up to date.
1792                  */
1793
1794                 if (!dev[i]->offload_enabled && dev[i]->offload_to_be_enabled)
1795                         hpsa_figure_phys_disk_ptrs(h, dev, ndevices, dev[i]);
1796         }
1797 }
1798
1799 static int hpsa_add_device(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1800 {
1801         int rc = 0;
1802
1803         if (!h->scsi_host)
1804                 return 1;
1805
1806         if (is_logical_device(device)) /* RAID */
1807                 rc = scsi_add_device(h->scsi_host, device->bus,
1808                                         device->target, device->lun);
1809         else /* HBA */
1810                 rc = hpsa_add_sas_device(h->sas_host, device);
1811
1812         return rc;
1813 }
1814
1815 static int hpsa_find_outstanding_commands_for_dev(struct ctlr_info *h,
1816                                                 struct hpsa_scsi_dev_t *dev)
1817 {
1818         int i;
1819         int count = 0;
1820
1821         for (i = 0; i < h->nr_cmds; i++) {
1822                 struct CommandList *c = h->cmd_pool + i;
1823                 int refcount = atomic_inc_return(&c->refcount);
1824
1825                 if (refcount > 1 && hpsa_cmd_dev_match(h, c, dev,
1826                                 dev->scsi3addr)) {
1827                         unsigned long flags;
1828
1829                         spin_lock_irqsave(&h->lock, flags);     /* Implied MB */
1830                         if (!hpsa_is_cmd_idle(c))
1831                                 ++count;
1832                         spin_unlock_irqrestore(&h->lock, flags);
1833                 }
1834
1835                 cmd_free(h, c);
1836         }
1837
1838         return count;
1839 }
1840
1841 #define NUM_WAIT 20
1842 static void hpsa_wait_for_outstanding_commands_for_dev(struct ctlr_info *h,
1843                                                 struct hpsa_scsi_dev_t *device)
1844 {
1845         int cmds = 0;
1846         int waits = 0;
1847         int num_wait = NUM_WAIT;
1848
1849         if (device->external)
1850                 num_wait = HPSA_EH_PTRAID_TIMEOUT;
1851
1852         while (1) {
1853                 cmds = hpsa_find_outstanding_commands_for_dev(h, device);
1854                 if (cmds == 0)
1855                         break;
1856                 if (++waits > num_wait)
1857                         break;
1858                 msleep(1000);
1859         }
1860
1861         if (waits > num_wait) {
1862                 dev_warn(&h->pdev->dev,
1863                         "%s: removing device [%d:%d:%d:%d] with %d outstanding commands!\n",
1864                         __func__,
1865                         h->scsi_host->host_no,
1866                         device->bus, device->target, device->lun, cmds);
1867         }
1868 }
1869
1870 static void hpsa_remove_device(struct ctlr_info *h,
1871                         struct hpsa_scsi_dev_t *device)
1872 {
1873         struct scsi_device *sdev = NULL;
1874
1875         if (!h->scsi_host)
1876                 return;
1877
1878         /*
1879          * Allow for commands to drain
1880          */
1881         device->removed = 1;
1882         hpsa_wait_for_outstanding_commands_for_dev(h, device);
1883
1884         if (is_logical_device(device)) { /* RAID */
1885                 sdev = scsi_device_lookup(h->scsi_host, device->bus,
1886                                                 device->target, device->lun);
1887                 if (sdev) {
1888                         scsi_remove_device(sdev);
1889                         scsi_device_put(sdev);
1890                 } else {
1891                         /*
1892                          * We don't expect to get here.  Future commands
1893                          * to this device will get a selection timeout as
1894                          * if the device were gone.
1895                          */
1896                         hpsa_show_dev_msg(KERN_WARNING, h, device,
1897                                         "didn't find device for removal.");
1898                 }
1899         } else { /* HBA */
1900
1901                 hpsa_remove_sas_device(device);
1902         }
1903 }
1904
1905 static void adjust_hpsa_scsi_table(struct ctlr_info *h,
1906         struct hpsa_scsi_dev_t *sd[], int nsds)
1907 {
1908         /* sd contains scsi3 addresses and devtypes, and inquiry
1909          * data.  This function takes what's in sd to be the current
1910          * reality and updates h->dev[] to reflect that reality.
1911          */
1912         int i, entry, device_change, changes = 0;
1913         struct hpsa_scsi_dev_t *csd;
1914         unsigned long flags;
1915         struct hpsa_scsi_dev_t **added, **removed;
1916         int nadded, nremoved;
1917
1918         /*
1919          * A reset can cause a device status to change
1920          * re-schedule the scan to see what happened.
1921          */
1922         spin_lock_irqsave(&h->reset_lock, flags);
1923         if (h->reset_in_progress) {
1924                 h->drv_req_rescan = 1;
1925                 spin_unlock_irqrestore(&h->reset_lock, flags);
1926                 return;
1927         }
1928         spin_unlock_irqrestore(&h->reset_lock, flags);
1929
1930         added = kcalloc(HPSA_MAX_DEVICES, sizeof(*added), GFP_KERNEL);
1931         removed = kcalloc(HPSA_MAX_DEVICES, sizeof(*removed), GFP_KERNEL);
1932
1933         if (!added || !removed) {
1934                 dev_warn(&h->pdev->dev, "out of memory in "
1935                         "adjust_hpsa_scsi_table\n");
1936                 goto free_and_out;
1937         }
1938
1939         spin_lock_irqsave(&h->devlock, flags);
1940
1941         /* find any devices in h->dev[] that are not in
1942          * sd[] and remove them from h->dev[], and for any
1943          * devices which have changed, remove the old device
1944          * info and add the new device info.
1945          * If minor device attributes change, just update
1946          * the existing device structure.
1947          */
1948         i = 0;
1949         nremoved = 0;
1950         nadded = 0;
1951         while (i < h->ndevices) {
1952                 csd = h->dev[i];
1953                 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
1954                 if (device_change == DEVICE_NOT_FOUND) {
1955                         changes++;
1956                         hpsa_scsi_remove_entry(h, i, removed, &nremoved);
1957                         continue; /* remove ^^^, hence i not incremented */
1958                 } else if (device_change == DEVICE_CHANGED) {
1959                         changes++;
1960                         hpsa_scsi_replace_entry(h, i, sd[entry],
1961                                 added, &nadded, removed, &nremoved);
1962                         /* Set it to NULL to prevent it from being freed
1963                          * at the bottom of hpsa_update_scsi_devices()
1964                          */
1965                         sd[entry] = NULL;
1966                 } else if (device_change == DEVICE_UPDATED) {
1967                         hpsa_scsi_update_entry(h, i, sd[entry]);
1968                 }
1969                 i++;
1970         }
1971
1972         /* Now, make sure every device listed in sd[] is also
1973          * listed in h->dev[], adding them if they aren't found
1974          */
1975
1976         for (i = 0; i < nsds; i++) {
1977                 if (!sd[i]) /* if already added above. */
1978                         continue;
1979
1980                 /* Don't add devices which are NOT READY, FORMAT IN PROGRESS
1981                  * as the SCSI mid-layer does not handle such devices well.
1982                  * It relentlessly loops sending TUR at 3Hz, then READ(10)
1983                  * at 160Hz, and prevents the system from coming up.
1984                  */
1985                 if (sd[i]->volume_offline) {
1986                         hpsa_show_volume_status(h, sd[i]);
1987                         hpsa_show_dev_msg(KERN_INFO, h, sd[i], "offline");
1988                         continue;
1989                 }
1990
1991                 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
1992                                         h->ndevices, &entry);
1993                 if (device_change == DEVICE_NOT_FOUND) {
1994                         changes++;
1995                         if (hpsa_scsi_add_entry(h, sd[i], added, &nadded) != 0)
1996                                 break;
1997                         sd[i] = NULL; /* prevent from being freed later. */
1998                 } else if (device_change == DEVICE_CHANGED) {
1999                         /* should never happen... */
2000                         changes++;
2001                         dev_warn(&h->pdev->dev,
2002                                 "device unexpectedly changed.\n");
2003                         /* but if it does happen, we just ignore that device */
2004                 }
2005         }
2006         hpsa_update_log_drive_phys_drive_ptrs(h, h->dev, h->ndevices);
2007
2008         /*
2009          * Now that h->dev[]->phys_disk[] is coherent, we can enable
2010          * any logical drives that need it enabled.
2011          *
2012          * The raid map should be current by now.
2013          *
2014          * We are updating the device list used for I/O requests.
2015          */
2016         for (i = 0; i < h->ndevices; i++) {
2017                 if (h->dev[i] == NULL)
2018                         continue;
2019                 h->dev[i]->offload_enabled = h->dev[i]->offload_to_be_enabled;
2020         }
2021
2022         spin_unlock_irqrestore(&h->devlock, flags);
2023
2024         /* Monitor devices which are in one of several NOT READY states to be
2025          * brought online later. This must be done without holding h->devlock,
2026          * so don't touch h->dev[]
2027          */
2028         for (i = 0; i < nsds; i++) {
2029                 if (!sd[i]) /* if already added above. */
2030                         continue;
2031                 if (sd[i]->volume_offline)
2032                         hpsa_monitor_offline_device(h, sd[i]->scsi3addr);
2033         }
2034
2035         /* Don't notify scsi mid layer of any changes the first time through
2036          * (or if there are no changes) scsi_scan_host will do it later the
2037          * first time through.
2038          */
2039         if (!changes)
2040                 goto free_and_out;
2041
2042         /* Notify scsi mid layer of any removed devices */
2043         for (i = 0; i < nremoved; i++) {
2044                 if (removed[i] == NULL)
2045                         continue;
2046                 if (removed[i]->expose_device)
2047                         hpsa_remove_device(h, removed[i]);
2048                 kfree(removed[i]);
2049                 removed[i] = NULL;
2050         }
2051
2052         /* Notify scsi mid layer of any added devices */
2053         for (i = 0; i < nadded; i++) {
2054                 int rc = 0;
2055
2056                 if (added[i] == NULL)
2057                         continue;
2058                 if (!(added[i]->expose_device))
2059                         continue;
2060                 rc = hpsa_add_device(h, added[i]);
2061                 if (!rc)
2062                         continue;
2063                 dev_warn(&h->pdev->dev,
2064                         "addition failed %d, device not added.", rc);
2065                 /* now we have to remove it from h->dev,
2066                  * since it didn't get added to scsi mid layer
2067                  */
2068                 fixup_botched_add(h, added[i]);
2069                 h->drv_req_rescan = 1;
2070         }
2071
2072 free_and_out:
2073         kfree(added);
2074         kfree(removed);
2075 }
2076
2077 /*
2078  * Lookup bus/target/lun and return corresponding struct hpsa_scsi_dev_t *
2079  * Assume's h->devlock is held.
2080  */
2081 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
2082         int bus, int target, int lun)
2083 {
2084         int i;
2085         struct hpsa_scsi_dev_t *sd;
2086
2087         for (i = 0; i < h->ndevices; i++) {
2088                 sd = h->dev[i];
2089                 if (sd->bus == bus && sd->target == target && sd->lun == lun)
2090                         return sd;
2091         }
2092         return NULL;
2093 }
2094
2095 static int hpsa_slave_alloc(struct scsi_device *sdev)
2096 {
2097         struct hpsa_scsi_dev_t *sd = NULL;
2098         unsigned long flags;
2099         struct ctlr_info *h;
2100
2101         h = sdev_to_hba(sdev);
2102         spin_lock_irqsave(&h->devlock, flags);
2103         if (sdev_channel(sdev) == HPSA_PHYSICAL_DEVICE_BUS) {
2104                 struct scsi_target *starget;
2105                 struct sas_rphy *rphy;
2106
2107                 starget = scsi_target(sdev);
2108                 rphy = target_to_rphy(starget);
2109                 sd = hpsa_find_device_by_sas_rphy(h, rphy);
2110                 if (sd) {
2111                         sd->target = sdev_id(sdev);
2112                         sd->lun = sdev->lun;
2113                 }
2114         }
2115         if (!sd)
2116                 sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
2117                                         sdev_id(sdev), sdev->lun);
2118
2119         if (sd && sd->expose_device) {
2120                 atomic_set(&sd->ioaccel_cmds_out, 0);
2121                 sdev->hostdata = sd;
2122         } else
2123                 sdev->hostdata = NULL;
2124         spin_unlock_irqrestore(&h->devlock, flags);
2125         return 0;
2126 }
2127
2128 /* configure scsi device based on internal per-device structure */
2129 static int hpsa_slave_configure(struct scsi_device *sdev)
2130 {
2131         struct hpsa_scsi_dev_t *sd;
2132         int queue_depth;
2133
2134         sd = sdev->hostdata;
2135         sdev->no_uld_attach = !sd || !sd->expose_device;
2136
2137         if (sd) {
2138                 sd->was_removed = 0;
2139                 if (sd->external) {
2140                         queue_depth = EXTERNAL_QD;
2141                         sdev->eh_timeout = HPSA_EH_PTRAID_TIMEOUT;
2142                         blk_queue_rq_timeout(sdev->request_queue,
2143                                                 HPSA_EH_PTRAID_TIMEOUT);
2144                 } else {
2145                         queue_depth = sd->queue_depth != 0 ?
2146                                         sd->queue_depth : sdev->host->can_queue;
2147                 }
2148         } else
2149                 queue_depth = sdev->host->can_queue;
2150
2151         scsi_change_queue_depth(sdev, queue_depth);
2152
2153         return 0;
2154 }
2155
2156 static void hpsa_slave_destroy(struct scsi_device *sdev)
2157 {
2158         struct hpsa_scsi_dev_t *hdev = NULL;
2159
2160         hdev = sdev->hostdata;
2161
2162         if (hdev)
2163                 hdev->was_removed = 1;
2164 }
2165
2166 static void hpsa_free_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
2167 {
2168         int i;
2169
2170         if (!h->ioaccel2_cmd_sg_list)
2171                 return;
2172         for (i = 0; i < h->nr_cmds; i++) {
2173                 kfree(h->ioaccel2_cmd_sg_list[i]);
2174                 h->ioaccel2_cmd_sg_list[i] = NULL;
2175         }
2176         kfree(h->ioaccel2_cmd_sg_list);
2177         h->ioaccel2_cmd_sg_list = NULL;
2178 }
2179
2180 static int hpsa_allocate_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
2181 {
2182         int i;
2183
2184         if (h->chainsize <= 0)
2185                 return 0;
2186
2187         h->ioaccel2_cmd_sg_list =
2188                 kcalloc(h->nr_cmds, sizeof(*h->ioaccel2_cmd_sg_list),
2189                                         GFP_KERNEL);
2190         if (!h->ioaccel2_cmd_sg_list)
2191                 return -ENOMEM;
2192         for (i = 0; i < h->nr_cmds; i++) {
2193                 h->ioaccel2_cmd_sg_list[i] =
2194                         kmalloc_array(h->maxsgentries,
2195                                       sizeof(*h->ioaccel2_cmd_sg_list[i]),
2196                                       GFP_KERNEL);
2197                 if (!h->ioaccel2_cmd_sg_list[i])
2198                         goto clean;
2199         }
2200         return 0;
2201
2202 clean:
2203         hpsa_free_ioaccel2_sg_chain_blocks(h);
2204         return -ENOMEM;
2205 }
2206
2207 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
2208 {
2209         int i;
2210
2211         if (!h->cmd_sg_list)
2212                 return;
2213         for (i = 0; i < h->nr_cmds; i++) {
2214                 kfree(h->cmd_sg_list[i]);
2215                 h->cmd_sg_list[i] = NULL;
2216         }
2217         kfree(h->cmd_sg_list);
2218         h->cmd_sg_list = NULL;
2219 }
2220
2221 static int hpsa_alloc_sg_chain_blocks(struct ctlr_info *h)
2222 {
2223         int i;
2224
2225         if (h->chainsize <= 0)
2226                 return 0;
2227
2228         h->cmd_sg_list = kcalloc(h->nr_cmds, sizeof(*h->cmd_sg_list),
2229                                  GFP_KERNEL);
2230         if (!h->cmd_sg_list)
2231                 return -ENOMEM;
2232
2233         for (i = 0; i < h->nr_cmds; i++) {
2234                 h->cmd_sg_list[i] = kmalloc_array(h->chainsize,
2235                                                   sizeof(*h->cmd_sg_list[i]),
2236                                                   GFP_KERNEL);
2237                 if (!h->cmd_sg_list[i])
2238                         goto clean;
2239
2240         }
2241         return 0;
2242
2243 clean:
2244         hpsa_free_sg_chain_blocks(h);
2245         return -ENOMEM;
2246 }
2247
2248 static int hpsa_map_ioaccel2_sg_chain_block(struct ctlr_info *h,
2249         struct io_accel2_cmd *cp, struct CommandList *c)
2250 {
2251         struct ioaccel2_sg_element *chain_block;
2252         u64 temp64;
2253         u32 chain_size;
2254
2255         chain_block = h->ioaccel2_cmd_sg_list[c->cmdindex];
2256         chain_size = le32_to_cpu(cp->sg[0].length);
2257         temp64 = dma_map_single(&h->pdev->dev, chain_block, chain_size,
2258                                 DMA_TO_DEVICE);
2259         if (dma_mapping_error(&h->pdev->dev, temp64)) {
2260                 /* prevent subsequent unmapping */
2261                 cp->sg->address = 0;
2262                 return -1;
2263         }
2264         cp->sg->address = cpu_to_le64(temp64);
2265         return 0;
2266 }
2267
2268 static void hpsa_unmap_ioaccel2_sg_chain_block(struct ctlr_info *h,
2269         struct io_accel2_cmd *cp)
2270 {
2271         struct ioaccel2_sg_element *chain_sg;
2272         u64 temp64;
2273         u32 chain_size;
2274
2275         chain_sg = cp->sg;
2276         temp64 = le64_to_cpu(chain_sg->address);
2277         chain_size = le32_to_cpu(cp->sg[0].length);
2278         dma_unmap_single(&h->pdev->dev, temp64, chain_size, DMA_TO_DEVICE);
2279 }
2280
2281 static int hpsa_map_sg_chain_block(struct ctlr_info *h,
2282         struct CommandList *c)
2283 {
2284         struct SGDescriptor *chain_sg, *chain_block;
2285         u64 temp64;
2286         u32 chain_len;
2287
2288         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2289         chain_block = h->cmd_sg_list[c->cmdindex];
2290         chain_sg->Ext = cpu_to_le32(HPSA_SG_CHAIN);
2291         chain_len = sizeof(*chain_sg) *
2292                 (le16_to_cpu(c->Header.SGTotal) - h->max_cmd_sg_entries);
2293         chain_sg->Len = cpu_to_le32(chain_len);
2294         temp64 = dma_map_single(&h->pdev->dev, chain_block, chain_len,
2295                                 DMA_TO_DEVICE);
2296         if (dma_mapping_error(&h->pdev->dev, temp64)) {
2297                 /* prevent subsequent unmapping */
2298                 chain_sg->Addr = cpu_to_le64(0);
2299                 return -1;
2300         }
2301         chain_sg->Addr = cpu_to_le64(temp64);
2302         return 0;
2303 }
2304
2305 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
2306         struct CommandList *c)
2307 {
2308         struct SGDescriptor *chain_sg;
2309
2310         if (le16_to_cpu(c->Header.SGTotal) <= h->max_cmd_sg_entries)
2311                 return;
2312
2313         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2314         dma_unmap_single(&h->pdev->dev, le64_to_cpu(chain_sg->Addr),
2315                         le32_to_cpu(chain_sg->Len), DMA_TO_DEVICE);
2316 }
2317
2318
2319 /* Decode the various types of errors on ioaccel2 path.
2320  * Return 1 for any error that should generate a RAID path retry.
2321  * Return 0 for errors that don't require a RAID path retry.
2322  */
2323 static int handle_ioaccel_mode2_error(struct ctlr_info *h,
2324                                         struct CommandList *c,
2325                                         struct scsi_cmnd *cmd,
2326                                         struct io_accel2_cmd *c2,
2327                                         struct hpsa_scsi_dev_t *dev)
2328 {
2329         int data_len;
2330         int retry = 0;
2331         u32 ioaccel2_resid = 0;
2332
2333         switch (c2->error_data.serv_response) {
2334         case IOACCEL2_SERV_RESPONSE_COMPLETE:
2335                 switch (c2->error_data.status) {
2336                 case IOACCEL2_STATUS_SR_TASK_COMP_GOOD:
2337                         break;
2338                 case IOACCEL2_STATUS_SR_TASK_COMP_CHK_COND:
2339                         cmd->result |= SAM_STAT_CHECK_CONDITION;
2340                         if (c2->error_data.data_present !=
2341                                         IOACCEL2_SENSE_DATA_PRESENT) {
2342                                 memset(cmd->sense_buffer, 0,
2343                                         SCSI_SENSE_BUFFERSIZE);
2344                                 break;
2345                         }
2346                         /* copy the sense data */
2347                         data_len = c2->error_data.sense_data_len;
2348                         if (data_len > SCSI_SENSE_BUFFERSIZE)
2349                                 data_len = SCSI_SENSE_BUFFERSIZE;
2350                         if (data_len > sizeof(c2->error_data.sense_data_buff))
2351                                 data_len =
2352                                         sizeof(c2->error_data.sense_data_buff);
2353                         memcpy(cmd->sense_buffer,
2354                                 c2->error_data.sense_data_buff, data_len);
2355                         retry = 1;
2356                         break;
2357                 case IOACCEL2_STATUS_SR_TASK_COMP_BUSY:
2358                         retry = 1;
2359                         break;
2360                 case IOACCEL2_STATUS_SR_TASK_COMP_RES_CON:
2361                         retry = 1;
2362                         break;
2363                 case IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL:
2364                         retry = 1;
2365                         break;
2366                 case IOACCEL2_STATUS_SR_TASK_COMP_ABORTED:
2367                         retry = 1;
2368                         break;
2369                 default:
2370                         retry = 1;
2371                         break;
2372                 }
2373                 break;
2374         case IOACCEL2_SERV_RESPONSE_FAILURE:
2375                 switch (c2->error_data.status) {
2376                 case IOACCEL2_STATUS_SR_IO_ERROR:
2377                 case IOACCEL2_STATUS_SR_IO_ABORTED:
2378                 case IOACCEL2_STATUS_SR_OVERRUN:
2379                         retry = 1;
2380                         break;
2381                 case IOACCEL2_STATUS_SR_UNDERRUN:
2382                         cmd->result = (DID_OK << 16);           /* host byte */
2383                         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
2384                         ioaccel2_resid = get_unaligned_le32(
2385                                                 &c2->error_data.resid_cnt[0]);
2386                         scsi_set_resid(cmd, ioaccel2_resid);
2387                         break;
2388                 case IOACCEL2_STATUS_SR_NO_PATH_TO_DEVICE:
2389                 case IOACCEL2_STATUS_SR_INVALID_DEVICE:
2390                 case IOACCEL2_STATUS_SR_IOACCEL_DISABLED:
2391                         /*
2392                          * Did an HBA disk disappear? We will eventually
2393                          * get a state change event from the controller but
2394                          * in the meantime, we need to tell the OS that the
2395                          * HBA disk is no longer there and stop I/O
2396                          * from going down. This allows the potential re-insert
2397                          * of the disk to get the same device node.
2398                          */
2399                         if (dev->physical_device && dev->expose_device) {
2400                                 cmd->result = DID_NO_CONNECT << 16;
2401                                 dev->removed = 1;
2402                                 h->drv_req_rescan = 1;
2403                                 dev_warn(&h->pdev->dev,
2404                                         "%s: device is gone!\n", __func__);
2405                         } else
2406                                 /*
2407                                  * Retry by sending down the RAID path.
2408                                  * We will get an event from ctlr to
2409                                  * trigger rescan regardless.
2410                                  */
2411                                 retry = 1;
2412                         break;
2413                 default:
2414                         retry = 1;
2415                 }
2416                 break;
2417         case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
2418                 break;
2419         case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
2420                 break;
2421         case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
2422                 retry = 1;
2423                 break;
2424         case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
2425                 break;
2426         default:
2427                 retry = 1;
2428                 break;
2429         }
2430
2431         if (dev->in_reset)
2432                 retry = 0;
2433
2434         return retry;   /* retry on raid path? */
2435 }
2436
2437 static void hpsa_cmd_resolve_events(struct ctlr_info *h,
2438                 struct CommandList *c)
2439 {
2440         struct hpsa_scsi_dev_t *dev = c->device;
2441
2442         /*
2443          * Reset c->scsi_cmd here so that the reset handler will know
2444          * this command has completed.  Then, check to see if the handler is
2445          * waiting for this command, and, if so, wake it.
2446          */
2447         c->scsi_cmd = SCSI_CMD_IDLE;
2448         mb();   /* Declare command idle before checking for pending events. */
2449         if (dev) {
2450                 atomic_dec(&dev->commands_outstanding);
2451                 if (dev->in_reset &&
2452                         atomic_read(&dev->commands_outstanding) <= 0)
2453                         wake_up_all(&h->event_sync_wait_queue);
2454         }
2455 }
2456
2457 static void hpsa_cmd_resolve_and_free(struct ctlr_info *h,
2458                                       struct CommandList *c)
2459 {
2460         hpsa_cmd_resolve_events(h, c);
2461         cmd_tagged_free(h, c);
2462 }
2463
2464 static void hpsa_cmd_free_and_done(struct ctlr_info *h,
2465                 struct CommandList *c, struct scsi_cmnd *cmd)
2466 {
2467         hpsa_cmd_resolve_and_free(h, c);
2468         if (cmd && cmd->scsi_done)
2469                 cmd->scsi_done(cmd);
2470 }
2471
2472 static void hpsa_retry_cmd(struct ctlr_info *h, struct CommandList *c)
2473 {
2474         INIT_WORK(&c->work, hpsa_command_resubmit_worker);
2475         queue_work_on(raw_smp_processor_id(), h->resubmit_wq, &c->work);
2476 }
2477
2478 static void process_ioaccel2_completion(struct ctlr_info *h,
2479                 struct CommandList *c, struct scsi_cmnd *cmd,
2480                 struct hpsa_scsi_dev_t *dev)
2481 {
2482         struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
2483
2484         /* check for good status */
2485         if (likely(c2->error_data.serv_response == 0 &&
2486                         c2->error_data.status == 0))
2487                 return hpsa_cmd_free_and_done(h, c, cmd);
2488
2489         /*
2490          * Any RAID offload error results in retry which will use
2491          * the normal I/O path so the controller can handle whatever is
2492          * wrong.
2493          */
2494         if (is_logical_device(dev) &&
2495                 c2->error_data.serv_response ==
2496                         IOACCEL2_SERV_RESPONSE_FAILURE) {
2497                 if (c2->error_data.status ==
2498                         IOACCEL2_STATUS_SR_IOACCEL_DISABLED) {
2499                         dev->offload_enabled = 0;
2500                         dev->offload_to_be_enabled = 0;
2501                 }
2502
2503                 if (dev->in_reset) {
2504                         cmd->result = DID_RESET << 16;
2505                         return hpsa_cmd_free_and_done(h, c, cmd);
2506                 }
2507
2508                 return hpsa_retry_cmd(h, c);
2509         }
2510
2511         if (handle_ioaccel_mode2_error(h, c, cmd, c2, dev))
2512                 return hpsa_retry_cmd(h, c);
2513
2514         return hpsa_cmd_free_and_done(h, c, cmd);
2515 }
2516
2517 /* Returns 0 on success, < 0 otherwise. */
2518 static int hpsa_evaluate_tmf_status(struct ctlr_info *h,
2519                                         struct CommandList *cp)
2520 {
2521         u8 tmf_status = cp->err_info->ScsiStatus;
2522
2523         switch (tmf_status) {
2524         case CISS_TMF_COMPLETE:
2525                 /*
2526                  * CISS_TMF_COMPLETE never happens, instead,
2527                  * ei->CommandStatus == 0 for this case.
2528                  */
2529         case CISS_TMF_SUCCESS:
2530                 return 0;
2531         case CISS_TMF_INVALID_FRAME:
2532         case CISS_TMF_NOT_SUPPORTED:
2533         case CISS_TMF_FAILED:
2534         case CISS_TMF_WRONG_LUN:
2535         case CISS_TMF_OVERLAPPED_TAG:
2536                 break;
2537         default:
2538                 dev_warn(&h->pdev->dev, "Unknown TMF status: 0x%02x\n",
2539                                 tmf_status);
2540                 break;
2541         }
2542         return -tmf_status;
2543 }
2544
2545 static void complete_scsi_command(struct CommandList *cp)
2546 {
2547         struct scsi_cmnd *cmd;
2548         struct ctlr_info *h;
2549         struct ErrorInfo *ei;
2550         struct hpsa_scsi_dev_t *dev;
2551         struct io_accel2_cmd *c2;
2552
2553         u8 sense_key;
2554         u8 asc;      /* additional sense code */
2555         u8 ascq;     /* additional sense code qualifier */
2556         unsigned long sense_data_size;
2557
2558         ei = cp->err_info;
2559         cmd = cp->scsi_cmd;
2560         h = cp->h;
2561
2562         if (!cmd->device) {
2563                 cmd->result = DID_NO_CONNECT << 16;
2564                 return hpsa_cmd_free_and_done(h, cp, cmd);
2565         }
2566
2567         dev = cmd->device->hostdata;
2568         if (!dev) {
2569                 cmd->result = DID_NO_CONNECT << 16;
2570                 return hpsa_cmd_free_and_done(h, cp, cmd);
2571         }
2572         c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];
2573
2574         scsi_dma_unmap(cmd); /* undo the DMA mappings */
2575         if ((cp->cmd_type == CMD_SCSI) &&
2576                 (le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
2577                 hpsa_unmap_sg_chain_block(h, cp);
2578
2579         if ((cp->cmd_type == CMD_IOACCEL2) &&
2580                 (c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
2581                 hpsa_unmap_ioaccel2_sg_chain_block(h, c2);
2582
2583         cmd->result = (DID_OK << 16);           /* host byte */
2584         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
2585
2586         /* SCSI command has already been cleaned up in SML */
2587         if (dev->was_removed) {
2588                 hpsa_cmd_resolve_and_free(h, cp);
2589                 return;
2590         }
2591
2592         if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1) {
2593                 if (dev->physical_device && dev->expose_device &&
2594                         dev->removed) {
2595                         cmd->result = DID_NO_CONNECT << 16;
2596                         return hpsa_cmd_free_and_done(h, cp, cmd);
2597                 }
2598                 if (likely(cp->phys_disk != NULL))
2599                         atomic_dec(&cp->phys_disk->ioaccel_cmds_out);
2600         }
2601
2602         /*
2603          * We check for lockup status here as it may be set for
2604          * CMD_SCSI, CMD_IOACCEL1 and CMD_IOACCEL2 commands by
2605          * fail_all_oustanding_cmds()
2606          */
2607         if (unlikely(ei->CommandStatus == CMD_CTLR_LOCKUP)) {
2608                 /* DID_NO_CONNECT will prevent a retry */
2609                 cmd->result = DID_NO_CONNECT << 16;
2610                 return hpsa_cmd_free_and_done(h, cp, cmd);
2611         }
2612
2613         if (cp->cmd_type == CMD_IOACCEL2)
2614                 return process_ioaccel2_completion(h, cp, cmd, dev);
2615
2616         scsi_set_resid(cmd, ei->ResidualCnt);
2617         if (ei->CommandStatus == 0)
2618                 return hpsa_cmd_free_and_done(h, cp, cmd);
2619
2620         /* For I/O accelerator commands, copy over some fields to the normal
2621          * CISS header used below for error handling.
2622          */
2623         if (cp->cmd_type == CMD_IOACCEL1) {
2624                 struct io_accel1_cmd *c = &h->ioaccel_cmd_pool[cp->cmdindex];
2625                 cp->Header.SGList = scsi_sg_count(cmd);
2626                 cp->Header.SGTotal = cpu_to_le16(cp->Header.SGList);
2627                 cp->Request.CDBLen = le16_to_cpu(c->io_flags) &
2628                         IOACCEL1_IOFLAGS_CDBLEN_MASK;
2629                 cp->Header.tag = c->tag;
2630                 memcpy(cp->Header.LUN.LunAddrBytes, c->CISS_LUN, 8);
2631                 memcpy(cp->Request.CDB, c->CDB, cp->Request.CDBLen);
2632
2633                 /* Any RAID offload error results in retry which will use
2634                  * the normal I/O path so the controller can handle whatever's
2635                  * wrong.
2636                  */
2637                 if (is_logical_device(dev)) {
2638                         if (ei->CommandStatus == CMD_IOACCEL_DISABLED)
2639                                 dev->offload_enabled = 0;
2640                         return hpsa_retry_cmd(h, cp);
2641                 }
2642         }
2643
2644         /* an error has occurred */
2645         switch (ei->CommandStatus) {
2646
2647         case CMD_TARGET_STATUS:
2648                 cmd->result |= ei->ScsiStatus;
2649                 /* copy the sense data */
2650                 if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
2651                         sense_data_size = SCSI_SENSE_BUFFERSIZE;
2652                 else
2653                         sense_data_size = sizeof(ei->SenseInfo);
2654                 if (ei->SenseLen < sense_data_size)
2655                         sense_data_size = ei->SenseLen;
2656                 memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
2657                 if (ei->ScsiStatus)
2658                         decode_sense_data(ei->SenseInfo, sense_data_size,
2659                                 &sense_key, &asc, &ascq);
2660                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
2661                         switch (sense_key) {
2662                         case ABORTED_COMMAND:
2663                                 cmd->result |= DID_SOFT_ERROR << 16;
2664                                 break;
2665                         case UNIT_ATTENTION:
2666                                 if (asc == 0x3F && ascq == 0x0E)
2667                                         h->drv_req_rescan = 1;
2668                                 break;
2669                         case ILLEGAL_REQUEST:
2670                                 if (asc == 0x25 && ascq == 0x00) {
2671                                         dev->removed = 1;
2672                                         cmd->result = DID_NO_CONNECT << 16;
2673                                 }
2674                                 break;
2675                         }
2676                         break;
2677                 }
2678                 /* Problem was not a check condition
2679                  * Pass it up to the upper layers...
2680                  */
2681                 if (ei->ScsiStatus) {
2682                         dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
2683                                 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
2684                                 "Returning result: 0x%x\n",
2685                                 cp, ei->ScsiStatus,
2686                                 sense_key, asc, ascq,
2687                                 cmd->result);
2688                 } else {  /* scsi status is zero??? How??? */
2689                         dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
2690                                 "Returning no connection.\n", cp),
2691
2692                         /* Ordinarily, this case should never happen,
2693                          * but there is a bug in some released firmware
2694                          * revisions that allows it to happen if, for
2695                          * example, a 4100 backplane loses power and
2696                          * the tape drive is in it.  We assume that
2697                          * it's a fatal error of some kind because we
2698                          * can't show that it wasn't. We will make it
2699                          * look like selection timeout since that is
2700                          * the most common reason for this to occur,
2701                          * and it's severe enough.
2702                          */
2703
2704                         cmd->result = DID_NO_CONNECT << 16;
2705                 }
2706                 break;
2707
2708         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
2709                 break;
2710         case CMD_DATA_OVERRUN:
2711                 dev_warn(&h->pdev->dev,
2712                         "CDB %16phN data overrun\n", cp->Request.CDB);
2713                 break;
2714         case CMD_INVALID: {
2715                 /* print_bytes(cp, sizeof(*cp), 1, 0);
2716                 print_cmd(cp); */
2717                 /* We get CMD_INVALID if you address a non-existent device
2718                  * instead of a selection timeout (no response).  You will
2719                  * see this if you yank out a drive, then try to access it.
2720                  * This is kind of a shame because it means that any other
2721                  * CMD_INVALID (e.g. driver bug) will get interpreted as a
2722                  * missing target. */
2723                 cmd->result = DID_NO_CONNECT << 16;
2724         }
2725                 break;
2726         case CMD_PROTOCOL_ERR:
2727                 cmd->result = DID_ERROR << 16;
2728                 dev_warn(&h->pdev->dev, "CDB %16phN : protocol error\n",
2729                                 cp->Request.CDB);
2730                 break;
2731         case CMD_HARDWARE_ERR:
2732                 cmd->result = DID_ERROR << 16;
2733                 dev_warn(&h->pdev->dev, "CDB %16phN : hardware error\n",
2734                         cp->Request.CDB);
2735                 break;
2736         case CMD_CONNECTION_LOST:
2737                 cmd->result = DID_ERROR << 16;
2738                 dev_warn(&h->pdev->dev, "CDB %16phN : connection lost\n",
2739                         cp->Request.CDB);
2740                 break;
2741         case CMD_ABORTED:
2742                 cmd->result = DID_ABORT << 16;
2743                 break;
2744         case CMD_ABORT_FAILED:
2745                 cmd->result = DID_ERROR << 16;
2746                 dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
2747                         cp->Request.CDB);
2748                 break;
2749         case CMD_UNSOLICITED_ABORT:
2750                 cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
2751                 dev_warn(&h->pdev->dev, "CDB %16phN : unsolicited abort\n",
2752                         cp->Request.CDB);
2753                 break;
2754         case CMD_TIMEOUT:
2755                 cmd->result = DID_TIME_OUT << 16;
2756                 dev_warn(&h->pdev->dev, "CDB %16phN timed out\n",
2757                         cp->Request.CDB);
2758                 break;
2759         case CMD_UNABORTABLE:
2760                 cmd->result = DID_ERROR << 16;
2761                 dev_warn(&h->pdev->dev, "Command unabortable\n");
2762                 break;
2763         case CMD_TMF_STATUS:
2764                 if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
2765                         cmd->result = DID_ERROR << 16;
2766                 break;
2767         case CMD_IOACCEL_DISABLED:
2768                 /* This only handles the direct pass-through case since RAID
2769                  * offload is handled above.  Just attempt a retry.
2770                  */
2771                 cmd->result = DID_SOFT_ERROR << 16;
2772                 dev_warn(&h->pdev->dev,
2773                                 "cp %p had HP SSD Smart Path error\n", cp);
2774                 break;
2775         default:
2776                 cmd->result = DID_ERROR << 16;
2777                 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
2778                                 cp, ei->CommandStatus);
2779         }
2780
2781         return hpsa_cmd_free_and_done(h, cp, cmd);
2782 }
2783
2784 static void hpsa_pci_unmap(struct pci_dev *pdev, struct CommandList *c,
2785                 int sg_used, enum dma_data_direction data_direction)
2786 {
2787         int i;
2788
2789         for (i = 0; i < sg_used; i++)
2790                 dma_unmap_single(&pdev->dev, le64_to_cpu(c->SG[i].Addr),
2791                                 le32_to_cpu(c->SG[i].Len),
2792                                 data_direction);
2793 }
2794
2795 static int hpsa_map_one(struct pci_dev *pdev,
2796                 struct CommandList *cp,
2797                 unsigned char *buf,
2798                 size_t buflen,
2799                 enum dma_data_direction data_direction)
2800 {
2801         u64 addr64;
2802
2803         if (buflen == 0 || data_direction == DMA_NONE) {
2804                 cp->Header.SGList = 0;
2805                 cp->Header.SGTotal = cpu_to_le16(0);
2806                 return 0;
2807         }
2808
2809         addr64 = dma_map_single(&pdev->dev, buf, buflen, data_direction);
2810         if (dma_mapping_error(&pdev->dev, addr64)) {
2811                 /* Prevent subsequent unmap of something never mapped */
2812                 cp->Header.SGList = 0;
2813                 cp->Header.SGTotal = cpu_to_le16(0);
2814                 return -1;
2815         }
2816         cp->SG[0].Addr = cpu_to_le64(addr64);
2817         cp->SG[0].Len = cpu_to_le32(buflen);
2818         cp->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* we are not chaining */
2819         cp->Header.SGList = 1;   /* no. SGs contig in this cmd */
2820         cp->Header.SGTotal = cpu_to_le16(1); /* total sgs in cmd list */
2821         return 0;
2822 }
2823
2824 #define NO_TIMEOUT ((unsigned long) -1)
2825 #define DEFAULT_TIMEOUT 30000 /* milliseconds */
2826 static int hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
2827         struct CommandList *c, int reply_queue, unsigned long timeout_msecs)
2828 {
2829         DECLARE_COMPLETION_ONSTACK(wait);
2830
2831         c->waiting = &wait;
2832         __enqueue_cmd_and_start_io(h, c, reply_queue);
2833         if (timeout_msecs == NO_TIMEOUT) {
2834                 /* TODO: get rid of this no-timeout thing */
2835                 wait_for_completion_io(&wait);
2836                 return IO_OK;
2837         }
2838         if (!wait_for_completion_io_timeout(&wait,
2839                                         msecs_to_jiffies(timeout_msecs))) {
2840                 dev_warn(&h->pdev->dev, "Command timed out.\n");
2841                 return -ETIMEDOUT;
2842         }
2843         return IO_OK;
2844 }
2845
2846 static int hpsa_scsi_do_simple_cmd(struct ctlr_info *h, struct CommandList *c,
2847                                    int reply_queue, unsigned long timeout_msecs)
2848 {
2849         if (unlikely(lockup_detected(h))) {
2850                 c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
2851                 return IO_OK;
2852         }
2853         return hpsa_scsi_do_simple_cmd_core(h, c, reply_queue, timeout_msecs);
2854 }
2855
2856 static u32 lockup_detected(struct ctlr_info *h)
2857 {
2858         int cpu;
2859         u32 rc, *lockup_detected;
2860
2861         cpu = get_cpu();
2862         lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
2863         rc = *lockup_detected;
2864         put_cpu();
2865         return rc;
2866 }
2867
2868 #define MAX_DRIVER_CMD_RETRIES 25
2869 static int hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
2870                 struct CommandList *c, enum dma_data_direction data_direction,
2871                 unsigned long timeout_msecs)
2872 {
2873         int backoff_time = 10, retry_count = 0;
2874         int rc;
2875
2876         do {
2877                 memset(c->err_info, 0, sizeof(*c->err_info));
2878                 rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
2879                                                   timeout_msecs);
2880                 if (rc)
2881                         break;
2882                 retry_count++;
2883                 if (retry_count > 3) {
2884                         msleep(backoff_time);
2885                         if (backoff_time < 1000)
2886                                 backoff_time *= 2;
2887                 }
2888         } while ((check_for_unit_attention(h, c) ||
2889                         check_for_busy(h, c)) &&
2890                         retry_count <= MAX_DRIVER_CMD_RETRIES);
2891         hpsa_pci_unmap(h->pdev, c, 1, data_direction);
2892         if (retry_count > MAX_DRIVER_CMD_RETRIES)
2893                 rc = -EIO;
2894         return rc;
2895 }
2896
2897 static void hpsa_print_cmd(struct ctlr_info *h, char *txt,
2898                                 struct CommandList *c)
2899 {
2900         const u8 *cdb = c->Request.CDB;
2901         const u8 *lun = c->Header.LUN.LunAddrBytes;
2902
2903         dev_warn(&h->pdev->dev, "%s: LUN:%8phN CDB:%16phN\n",
2904                  txt, lun, cdb);
2905 }
2906
2907 static void hpsa_scsi_interpret_error(struct ctlr_info *h,
2908                         struct CommandList *cp)
2909 {
2910         const struct ErrorInfo *ei = cp->err_info;
2911         struct device *d = &cp->h->pdev->dev;
2912         u8 sense_key, asc, ascq;
2913         int sense_len;
2914
2915         switch (ei->CommandStatus) {
2916         case CMD_TARGET_STATUS:
2917                 if (ei->SenseLen > sizeof(ei->SenseInfo))
2918                         sense_len = sizeof(ei->SenseInfo);
2919                 else
2920                         sense_len = ei->SenseLen;
2921                 decode_sense_data(ei->SenseInfo, sense_len,
2922                                         &sense_key, &asc, &ascq);
2923                 hpsa_print_cmd(h, "SCSI status", cp);
2924                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
2925                         dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
2926                                 sense_key, asc, ascq);
2927                 else
2928                         dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
2929                 if (ei->ScsiStatus == 0)
2930                         dev_warn(d, "SCSI status is abnormally zero.  "
2931                         "(probably indicates selection timeout "
2932                         "reported incorrectly due to a known "
2933                         "firmware bug, circa July, 2001.)\n");
2934                 break;
2935         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
2936                 break;
2937         case CMD_DATA_OVERRUN:
2938                 hpsa_print_cmd(h, "overrun condition", cp);
2939                 break;
2940         case CMD_INVALID: {
2941                 /* controller unfortunately reports SCSI passthru's
2942                  * to non-existent targets as invalid commands.
2943                  */
2944                 hpsa_print_cmd(h, "invalid command", cp);
2945                 dev_warn(d, "probably means device no longer present\n");
2946                 }
2947                 break;
2948         case CMD_PROTOCOL_ERR:
2949                 hpsa_print_cmd(h, "protocol error", cp);
2950                 break;
2951         case CMD_HARDWARE_ERR:
2952                 hpsa_print_cmd(h, "hardware error", cp);
2953                 break;
2954         case CMD_CONNECTION_LOST:
2955                 hpsa_print_cmd(h, "connection lost", cp);
2956                 break;
2957         case CMD_ABORTED:
2958                 hpsa_print_cmd(h, "aborted", cp);
2959                 break;
2960         case CMD_ABORT_FAILED:
2961                 hpsa_print_cmd(h, "abort failed", cp);
2962                 break;
2963         case CMD_UNSOLICITED_ABORT:
2964                 hpsa_print_cmd(h, "unsolicited abort", cp);
2965                 break;
2966         case CMD_TIMEOUT:
2967                 hpsa_print_cmd(h, "timed out", cp);
2968                 break;
2969         case CMD_UNABORTABLE:
2970                 hpsa_print_cmd(h, "unabortable", cp);
2971                 break;
2972         case CMD_CTLR_LOCKUP:
2973                 hpsa_print_cmd(h, "controller lockup detected", cp);
2974                 break;
2975         default:
2976                 hpsa_print_cmd(h, "unknown status", cp);
2977                 dev_warn(d, "Unknown command status %x\n",
2978                                 ei->CommandStatus);
2979         }
2980 }
2981
2982 static int hpsa_do_receive_diagnostic(struct ctlr_info *h, u8 *scsi3addr,
2983                                         u8 page, u8 *buf, size_t bufsize)
2984 {
2985         int rc = IO_OK;
2986         struct CommandList *c;
2987         struct ErrorInfo *ei;
2988
2989         c = cmd_alloc(h);
2990         if (fill_cmd(c, RECEIVE_DIAGNOSTIC, h, buf, bufsize,
2991                         page, scsi3addr, TYPE_CMD)) {
2992                 rc = -1;
2993                 goto out;
2994         }
2995         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
2996                         NO_TIMEOUT);
2997         if (rc)
2998                 goto out;
2999         ei = c->err_info;
3000         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3001                 hpsa_scsi_interpret_error(h, c);
3002                 rc = -1;
3003         }
3004 out:
3005         cmd_free(h, c);
3006         return rc;
3007 }
3008
3009 static u64 hpsa_get_enclosure_logical_identifier(struct ctlr_info *h,
3010                                                 u8 *scsi3addr)
3011 {
3012         u8 *buf;
3013         u64 sa = 0;
3014         int rc = 0;
3015
3016         buf = kzalloc(1024, GFP_KERNEL);
3017         if (!buf)
3018                 return 0;
3019
3020         rc = hpsa_do_receive_diagnostic(h, scsi3addr, RECEIVE_DIAGNOSTIC,
3021                                         buf, 1024);
3022
3023         if (rc)
3024                 goto out;
3025
3026         sa = get_unaligned_be64(buf+12);
3027
3028 out:
3029         kfree(buf);
3030         return sa;
3031 }
3032
3033 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
3034                         u16 page, unsigned char *buf,
3035                         unsigned char bufsize)
3036 {
3037         int rc = IO_OK;
3038         struct CommandList *c;
3039         struct ErrorInfo *ei;
3040
3041         c = cmd_alloc(h);
3042
3043         if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
3044                         page, scsi3addr, TYPE_CMD)) {
3045                 rc = -1;
3046                 goto out;
3047         }
3048         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3049                         NO_TIMEOUT);
3050         if (rc)
3051                 goto out;
3052         ei = c->err_info;
3053         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3054                 hpsa_scsi_interpret_error(h, c);
3055                 rc = -1;
3056         }
3057 out:
3058         cmd_free(h, c);
3059         return rc;
3060 }
3061
3062 static int hpsa_send_reset(struct ctlr_info *h, struct hpsa_scsi_dev_t *dev,
3063         u8 reset_type, int reply_queue)
3064 {
3065         int rc = IO_OK;
3066         struct CommandList *c;
3067         struct ErrorInfo *ei;
3068
3069         c = cmd_alloc(h);
3070         c->device = dev;
3071
3072         /* fill_cmd can't fail here, no data buffer to map. */
3073         (void) fill_cmd(c, reset_type, h, NULL, 0, 0, dev->scsi3addr, TYPE_MSG);
3074         rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
3075         if (rc) {
3076                 dev_warn(&h->pdev->dev, "Failed to send reset command\n");
3077                 goto out;
3078         }
3079         /* no unmap needed here because no data xfer. */
3080
3081         ei = c->err_info;
3082         if (ei->CommandStatus != 0) {
3083                 hpsa_scsi_interpret_error(h, c);
3084                 rc = -1;
3085         }
3086 out:
3087         cmd_free(h, c);
3088         return rc;
3089 }
3090
3091 static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
3092                                struct hpsa_scsi_dev_t *dev,
3093                                unsigned char *scsi3addr)
3094 {
3095         int i;
3096         bool match = false;
3097         struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
3098         struct hpsa_tmf_struct *ac = (struct hpsa_tmf_struct *) c2;
3099
3100         if (hpsa_is_cmd_idle(c))
3101                 return false;
3102
3103         switch (c->cmd_type) {
3104         case CMD_SCSI:
3105         case CMD_IOCTL_PEND:
3106                 match = !memcmp(scsi3addr, &c->Header.LUN.LunAddrBytes,
3107                                 sizeof(c->Header.LUN.LunAddrBytes));
3108                 break;
3109
3110         case CMD_IOACCEL1:
3111         case CMD_IOACCEL2:
3112                 if (c->phys_disk == dev) {
3113                         /* HBA mode match */
3114                         match = true;
3115                 } else {
3116                         /* Possible RAID mode -- check each phys dev. */
3117                         /* FIXME:  Do we need to take out a lock here?  If
3118                          * so, we could just call hpsa_get_pdisk_of_ioaccel2()
3119                          * instead. */
3120                         for (i = 0; i < dev->nphysical_disks && !match; i++) {
3121                                 /* FIXME: an alternate test might be
3122                                  *
3123                                  * match = dev->phys_disk[i]->ioaccel_handle
3124                                  *              == c2->scsi_nexus;      */
3125                                 match = dev->phys_disk[i] == c->phys_disk;
3126                         }
3127                 }
3128                 break;
3129
3130         case IOACCEL2_TMF:
3131                 for (i = 0; i < dev->nphysical_disks && !match; i++) {
3132                         match = dev->phys_disk[i]->ioaccel_handle ==
3133                                         le32_to_cpu(ac->it_nexus);
3134                 }
3135                 break;
3136
3137         case 0:         /* The command is in the middle of being initialized. */
3138                 match = false;
3139                 break;
3140
3141         default:
3142                 dev_err(&h->pdev->dev, "unexpected cmd_type: %d\n",
3143                         c->cmd_type);
3144                 BUG();
3145         }
3146
3147         return match;
3148 }
3149
3150 static int hpsa_do_reset(struct ctlr_info *h, struct hpsa_scsi_dev_t *dev,
3151         u8 reset_type, int reply_queue)
3152 {
3153         int rc = 0;
3154
3155         /* We can really only handle one reset at a time */
3156         if (mutex_lock_interruptible(&h->reset_mutex) == -EINTR) {
3157                 dev_warn(&h->pdev->dev, "concurrent reset wait interrupted.\n");
3158                 return -EINTR;
3159         }
3160
3161         rc = hpsa_send_reset(h, dev, reset_type, reply_queue);
3162         if (!rc) {
3163                 /* incremented by sending the reset request */
3164                 atomic_dec(&dev->commands_outstanding);
3165                 wait_event(h->event_sync_wait_queue,
3166                         atomic_read(&dev->commands_outstanding) <= 0 ||
3167                         lockup_detected(h));
3168         }
3169
3170         if (unlikely(lockup_detected(h))) {
3171                 dev_warn(&h->pdev->dev,
3172                          "Controller lockup detected during reset wait\n");
3173                 rc = -ENODEV;
3174         }
3175
3176         if (!rc)
3177                 rc = wait_for_device_to_become_ready(h, dev->scsi3addr, 0);
3178
3179         mutex_unlock(&h->reset_mutex);
3180         return rc;
3181 }
3182
3183 static void hpsa_get_raid_level(struct ctlr_info *h,
3184         unsigned char *scsi3addr, unsigned char *raid_level)
3185 {
3186         int rc;
3187         unsigned char *buf;
3188
3189         *raid_level = RAID_UNKNOWN;
3190         buf = kzalloc(64, GFP_KERNEL);
3191         if (!buf)
3192                 return;
3193
3194         if (!hpsa_vpd_page_supported(h, scsi3addr,
3195                 HPSA_VPD_LV_DEVICE_GEOMETRY))
3196                 goto exit;
3197
3198         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
3199                 HPSA_VPD_LV_DEVICE_GEOMETRY, buf, 64);
3200
3201         if (rc == 0)
3202                 *raid_level = buf[8];
3203         if (*raid_level > RAID_UNKNOWN)
3204                 *raid_level = RAID_UNKNOWN;
3205 exit:
3206         kfree(buf);
3207         return;
3208 }
3209
3210 #define HPSA_MAP_DEBUG
3211 #ifdef HPSA_MAP_DEBUG
3212 static void hpsa_debug_map_buff(struct ctlr_info *h, int rc,
3213                                 struct raid_map_data *map_buff)
3214 {
3215         struct raid_map_disk_data *dd = &map_buff->data[0];
3216         int map, row, col;
3217         u16 map_cnt, row_cnt, disks_per_row;
3218
3219         if (rc != 0)
3220                 return;
3221
3222         /* Show details only if debugging has been activated. */
3223         if (h->raid_offload_debug < 2)
3224                 return;
3225
3226         dev_info(&h->pdev->dev, "structure_size = %u\n",
3227                                 le32_to_cpu(map_buff->structure_size));
3228         dev_info(&h->pdev->dev, "volume_blk_size = %u\n",
3229                         le32_to_cpu(map_buff->volume_blk_size));
3230         dev_info(&h->pdev->dev, "volume_blk_cnt = 0x%llx\n",
3231                         le64_to_cpu(map_buff->volume_blk_cnt));
3232         dev_info(&h->pdev->dev, "physicalBlockShift = %u\n",
3233                         map_buff->phys_blk_shift);
3234         dev_info(&h->pdev->dev, "parity_rotation_shift = %u\n",
3235                         map_buff->parity_rotation_shift);
3236         dev_info(&h->pdev->dev, "strip_size = %u\n",
3237                         le16_to_cpu(map_buff->strip_size));
3238         dev_info(&h->pdev->dev, "disk_starting_blk = 0x%llx\n",
3239                         le64_to_cpu(map_buff->disk_starting_blk));
3240         dev_info(&h->pdev->dev, "disk_blk_cnt = 0x%llx\n",
3241                         le64_to_cpu(map_buff->disk_blk_cnt));
3242         dev_info(&h->pdev->dev, "data_disks_per_row = %u\n",
3243                         le16_to_cpu(map_buff->data_disks_per_row));
3244         dev_info(&h->pdev->dev, "metadata_disks_per_row = %u\n",
3245                         le16_to_cpu(map_buff->metadata_disks_per_row));
3246         dev_info(&h->pdev->dev, "row_cnt = %u\n",
3247                         le16_to_cpu(map_buff->row_cnt));
3248         dev_info(&h->pdev->dev, "layout_map_count = %u\n",
3249                         le16_to_cpu(map_buff->layout_map_count));
3250         dev_info(&h->pdev->dev, "flags = 0x%x\n",
3251                         le16_to_cpu(map_buff->flags));
3252         dev_info(&h->pdev->dev, "encryption = %s\n",
3253                         le16_to_cpu(map_buff->flags) &
3254                         RAID_MAP_FLAG_ENCRYPT_ON ?  "ON" : "OFF");
3255         dev_info(&h->pdev->dev, "dekindex = %u\n",
3256                         le16_to_cpu(map_buff->dekindex));
3257         map_cnt = le16_to_cpu(map_buff->layout_map_count);
3258         for (map = 0; map < map_cnt; map++) {
3259                 dev_info(&h->pdev->dev, "Map%u:\n", map);
3260                 row_cnt = le16_to_cpu(map_buff->row_cnt);
3261                 for (row = 0; row < row_cnt; row++) {
3262                         dev_info(&h->pdev->dev, "  Row%u:\n", row);
3263                         disks_per_row =
3264                                 le16_to_cpu(map_buff->data_disks_per_row);
3265                         for (col = 0; col < disks_per_row; col++, dd++)
3266                                 dev_info(&h->pdev->dev,
3267                                         "    D%02u: h=0x%04x xor=%u,%u\n",
3268                                         col, dd->ioaccel_handle,
3269                                         dd->xor_mult[0], dd->xor_mult[1]);
3270                         disks_per_row =
3271                                 le16_to_cpu(map_buff->metadata_disks_per_row);
3272                         for (col = 0; col < disks_per_row; col++, dd++)
3273                                 dev_info(&h->pdev->dev,
3274                                         "    M%02u: h=0x%04x xor=%u,%u\n",
3275                                         col, dd->ioaccel_handle,
3276                                         dd->xor_mult[0], dd->xor_mult[1]);
3277                 }
3278         }
3279 }
3280 #else
3281 static void hpsa_debug_map_buff(__attribute__((unused)) struct ctlr_info *h,
3282                         __attribute__((unused)) int rc,
3283                         __attribute__((unused)) struct raid_map_data *map_buff)
3284 {
3285 }
3286 #endif
3287
3288 static int hpsa_get_raid_map(struct ctlr_info *h,
3289         unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
3290 {
3291         int rc = 0;
3292         struct CommandList *c;
3293         struct ErrorInfo *ei;
3294
3295         c = cmd_alloc(h);
3296
3297         if (fill_cmd(c, HPSA_GET_RAID_MAP, h, &this_device->raid_map,
3298                         sizeof(this_device->raid_map), 0,
3299                         scsi3addr, TYPE_CMD)) {
3300                 dev_warn(&h->pdev->dev, "hpsa_get_raid_map fill_cmd failed\n");
3301                 cmd_free(h, c);
3302                 return -1;
3303         }
3304         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3305                         NO_TIMEOUT);
3306         if (rc)
3307                 goto out;
3308         ei = c->err_info;
3309         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3310                 hpsa_scsi_interpret_error(h, c);
3311                 rc = -1;
3312                 goto out;
3313         }
3314         cmd_free(h, c);
3315
3316         /* @todo in the future, dynamically allocate RAID map memory */
3317         if (le32_to_cpu(this_device->raid_map.structure_size) >
3318                                 sizeof(this_device->raid_map)) {
3319                 dev_warn(&h->pdev->dev, "RAID map size is too large!\n");
3320                 rc = -1;
3321         }
3322         hpsa_debug_map_buff(h, rc, &this_device->raid_map);
3323         return rc;
3324 out:
3325         cmd_free(h, c);
3326         return rc;
3327 }
3328
3329 static int hpsa_bmic_sense_subsystem_information(struct ctlr_info *h,
3330                 unsigned char scsi3addr[], u16 bmic_device_index,
3331                 struct bmic_sense_subsystem_info *buf, size_t bufsize)
3332 {
3333         int rc = IO_OK;
3334         struct CommandList *c;
3335         struct ErrorInfo *ei;
3336
3337         c = cmd_alloc(h);
3338
3339         rc = fill_cmd(c, BMIC_SENSE_SUBSYSTEM_INFORMATION, h, buf, bufsize,
3340                 0, RAID_CTLR_LUNID, TYPE_CMD);
3341         if (rc)
3342                 goto out;
3343
3344         c->Request.CDB[2] = bmic_device_index & 0xff;
3345         c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;
3346
3347         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3348                         NO_TIMEOUT);
3349         if (rc)
3350                 goto out;
3351         ei = c->err_info;
3352         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3353                 hpsa_scsi_interpret_error(h, c);
3354                 rc = -1;
3355         }
3356 out:
3357         cmd_free(h, c);
3358         return rc;
3359 }
3360
3361 static int hpsa_bmic_id_controller(struct ctlr_info *h,
3362         struct bmic_identify_controller *buf, size_t bufsize)
3363 {
3364         int rc = IO_OK;
3365         struct CommandList *c;
3366         struct ErrorInfo *ei;
3367
3368         c = cmd_alloc(h);
3369
3370         rc = fill_cmd(c, BMIC_IDENTIFY_CONTROLLER, h, buf, bufsize,
3371                 0, RAID_CTLR_LUNID, TYPE_CMD);
3372         if (rc)
3373                 goto out;
3374
3375         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3376                         NO_TIMEOUT);
3377         if (rc)
3378                 goto out;
3379         ei = c->err_info;
3380         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3381                 hpsa_scsi_interpret_error(h, c);
3382                 rc = -1;
3383         }
3384 out:
3385         cmd_free(h, c);
3386         return rc;
3387 }
3388
3389 static int hpsa_bmic_id_physical_device(struct ctlr_info *h,
3390                 unsigned char scsi3addr[], u16 bmic_device_index,
3391                 struct bmic_identify_physical_device *buf, size_t bufsize)
3392 {
3393         int rc = IO_OK;
3394         struct CommandList *c;
3395         struct ErrorInfo *ei;
3396
3397         c = cmd_alloc(h);
3398         rc = fill_cmd(c, BMIC_IDENTIFY_PHYSICAL_DEVICE, h, buf, bufsize,
3399                 0, RAID_CTLR_LUNID, TYPE_CMD);
3400         if (rc)
3401                 goto out;
3402
3403         c->Request.CDB[2] = bmic_device_index & 0xff;
3404         c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;
3405
3406         hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3407                                                 NO_TIMEOUT);
3408         ei = c->err_info;
3409         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3410                 hpsa_scsi_interpret_error(h, c);
3411                 rc = -1;
3412         }
3413 out:
3414         cmd_free(h, c);
3415
3416         return rc;
3417 }
3418
3419 /*
3420  * get enclosure information
3421  * struct ReportExtendedLUNdata *rlep - Used for BMIC drive number
3422  * struct hpsa_scsi_dev_t *encl_dev - device entry for enclosure
3423  * Uses id_physical_device to determine the box_index.
3424  */
3425 static void hpsa_get_enclosure_info(struct ctlr_info *h,
3426                         unsigned char *scsi3addr,
3427                         struct ReportExtendedLUNdata *rlep, int rle_index,
3428                         struct hpsa_scsi_dev_t *encl_dev)
3429 {
3430         int rc = -1;
3431         struct CommandList *c = NULL;
3432         struct ErrorInfo *ei = NULL;
3433         struct bmic_sense_storage_box_params *bssbp = NULL;
3434         struct bmic_identify_physical_device *id_phys = NULL;
3435         struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
3436         u16 bmic_device_index = 0;
3437
3438         encl_dev->eli =
3439                 hpsa_get_enclosure_logical_identifier(h, scsi3addr);
3440
3441         bmic_device_index = GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]);
3442
3443         if (encl_dev->target == -1 || encl_dev->lun == -1) {
3444                 rc = IO_OK;
3445                 goto out;
3446         }
3447
3448         if (bmic_device_index == 0xFF00 || MASKED_DEVICE(&rle->lunid[0])) {
3449                 rc = IO_OK;
3450                 goto out;
3451         }
3452
3453         bssbp = kzalloc(sizeof(*bssbp), GFP_KERNEL);
3454         if (!bssbp)
3455                 goto out;
3456
3457         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
3458         if (!id_phys)
3459                 goto out;
3460
3461         rc = hpsa_bmic_id_physical_device(h, scsi3addr, bmic_device_index,
3462                                                 id_phys, sizeof(*id_phys));
3463         if (rc) {
3464                 dev_warn(&h->pdev->dev, "%s: id_phys failed %d bdi[0x%x]\n",
3465                         __func__, encl_dev->external, bmic_device_index);
3466                 goto out;
3467         }
3468
3469         c = cmd_alloc(h);
3470
3471         rc = fill_cmd(c, BMIC_SENSE_STORAGE_BOX_PARAMS, h, bssbp,
3472                         sizeof(*bssbp), 0, RAID_CTLR_LUNID, TYPE_CMD);
3473
3474         if (rc)
3475                 goto out;
3476
3477         if (id_phys->phys_connector[1] == 'E')
3478                 c->Request.CDB[5] = id_phys->box_index;
3479         else
3480                 c->Request.CDB[5] = 0;
3481
3482         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3483                                                 NO_TIMEOUT);
3484         if (rc)
3485                 goto out;
3486
3487         ei = c->err_info;
3488         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3489                 rc = -1;
3490                 goto out;
3491         }
3492
3493         encl_dev->box[id_phys->active_path_number] = bssbp->phys_box_on_port;
3494         memcpy(&encl_dev->phys_connector[id_phys->active_path_number],
3495                 bssbp->phys_connector, sizeof(bssbp->phys_connector));
3496
3497         rc = IO_OK;
3498 out:
3499         kfree(bssbp);
3500         kfree(id_phys);
3501
3502         if (c)
3503                 cmd_free(h, c);
3504
3505         if (rc != IO_OK)
3506                 hpsa_show_dev_msg(KERN_INFO, h, encl_dev,
3507                         "Error, could not get enclosure information");
3508 }
3509
3510 static u64 hpsa_get_sas_address_from_report_physical(struct ctlr_info *h,
3511                                                 unsigned char *scsi3addr)
3512 {
3513         struct ReportExtendedLUNdata *physdev;
3514         u32 nphysicals;
3515         u64 sa = 0;
3516         int i;
3517
3518         physdev = kzalloc(sizeof(*physdev), GFP_KERNEL);
3519         if (!physdev)
3520                 return 0;
3521
3522         if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
3523                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
3524                 kfree(physdev);
3525                 return 0;
3526         }
3527         nphysicals = get_unaligned_be32(physdev->LUNListLength) / 24;
3528
3529         for (i = 0; i < nphysicals; i++)
3530                 if (!memcmp(&physdev->LUN[i].lunid[0], scsi3addr, 8)) {
3531                         sa = get_unaligned_be64(&physdev->LUN[i].wwid[0]);
3532                         break;
3533                 }
3534
3535         kfree(physdev);
3536
3537         return sa;
3538 }
3539
3540 static void hpsa_get_sas_address(struct ctlr_info *h, unsigned char *scsi3addr,
3541                                         struct hpsa_scsi_dev_t *dev)
3542 {
3543         int rc;
3544         u64 sa = 0;
3545
3546         if (is_hba_lunid(scsi3addr)) {
3547                 struct bmic_sense_subsystem_info *ssi;
3548
3549                 ssi = kzalloc(sizeof(*ssi), GFP_KERNEL);
3550                 if (!ssi)
3551                         return;
3552
3553                 rc = hpsa_bmic_sense_subsystem_information(h,
3554                                         scsi3addr, 0, ssi, sizeof(*ssi));
3555                 if (rc == 0) {
3556                         sa = get_unaligned_be64(ssi->primary_world_wide_id);
3557                         h->sas_address = sa;
3558                 }
3559
3560                 kfree(ssi);
3561         } else
3562                 sa = hpsa_get_sas_address_from_report_physical(h, scsi3addr);
3563
3564         dev->sas_address = sa;
3565 }
3566
3567 static void hpsa_ext_ctrl_present(struct ctlr_info *h,
3568         struct ReportExtendedLUNdata *physdev)
3569 {
3570         u32 nphysicals;
3571         int i;
3572
3573         if (h->discovery_polling)
3574                 return;
3575
3576         nphysicals = (get_unaligned_be32(physdev->LUNListLength) / 24) + 1;
3577
3578         for (i = 0; i < nphysicals; i++) {
3579                 if (physdev->LUN[i].device_type ==
3580                         BMIC_DEVICE_TYPE_CONTROLLER
3581                         && !is_hba_lunid(physdev->LUN[i].lunid)) {
3582                         dev_info(&h->pdev->dev,
3583                                 "External controller present, activate discovery polling and disable rld caching\n");
3584                         hpsa_disable_rld_caching(h);
3585                         h->discovery_polling = 1;
3586                         break;
3587                 }
3588         }
3589 }
3590
3591 /* Get a device id from inquiry page 0x83 */
3592 static bool hpsa_vpd_page_supported(struct ctlr_info *h,
3593         unsigned char scsi3addr[], u8 page)
3594 {
3595         int rc;
3596         int i;
3597         int pages;
3598         unsigned char *buf, bufsize;
3599
3600         buf = kzalloc(256, GFP_KERNEL);
3601         if (!buf)
3602                 return false;
3603
3604         /* Get the size of the page list first */
3605         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3606                                 VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
3607                                 buf, HPSA_VPD_HEADER_SZ);
3608         if (rc != 0)
3609                 goto exit_unsupported;
3610         pages = buf[3];
3611         if ((pages + HPSA_VPD_HEADER_SZ) <= 255)
3612                 bufsize = pages + HPSA_VPD_HEADER_SZ;
3613         else
3614                 bufsize = 255;
3615
3616         /* Get the whole VPD page list */
3617         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3618                                 VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
3619                                 buf, bufsize);
3620         if (rc != 0)
3621                 goto exit_unsupported;
3622
3623         pages = buf[3];
3624         for (i = 1; i <= pages; i++)
3625                 if (buf[3 + i] == page)
3626                         goto exit_supported;
3627 exit_unsupported:
3628         kfree(buf);
3629         return false;
3630 exit_supported:
3631         kfree(buf);
3632         return true;
3633 }
3634
3635 /*
3636  * Called during a scan operation.
3637  * Sets ioaccel status on the new device list, not the existing device list
3638  *
3639  * The device list used during I/O will be updated later in
3640  * adjust_hpsa_scsi_table.
3641  */
3642 static void hpsa_get_ioaccel_status(struct ctlr_info *h,
3643         unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
3644 {
3645         int rc;
3646         unsigned char *buf;
3647         u8 ioaccel_status;
3648
3649         this_device->offload_config = 0;
3650         this_device->offload_enabled = 0;
3651         this_device->offload_to_be_enabled = 0;
3652
3653         buf = kzalloc(64, GFP_KERNEL);
3654         if (!buf)
3655                 return;
3656         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_IOACCEL_STATUS))
3657                 goto out;
3658         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3659                         VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS, buf, 64);
3660         if (rc != 0)
3661                 goto out;
3662
3663 #define IOACCEL_STATUS_BYTE 4
3664 #define OFFLOAD_CONFIGURED_BIT 0x01
3665 #define OFFLOAD_ENABLED_BIT 0x02
3666         ioaccel_status = buf[IOACCEL_STATUS_BYTE];
3667         this_device->offload_config =
3668                 !!(ioaccel_status & OFFLOAD_CONFIGURED_BIT);
3669         if (this_device->offload_config) {
3670                 this_device->offload_to_be_enabled =
3671                         !!(ioaccel_status & OFFLOAD_ENABLED_BIT);
3672                 if (hpsa_get_raid_map(h, scsi3addr, this_device))
3673                         this_device->offload_to_be_enabled = 0;
3674         }
3675
3676 out:
3677         kfree(buf);
3678         return;
3679 }
3680
3681 /* Get the device id from inquiry page 0x83 */
3682 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
3683         unsigned char *device_id, int index, int buflen)
3684 {
3685         int rc;
3686         unsigned char *buf;
3687
3688         /* Does controller have VPD for device id? */
3689         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_DEVICE_ID))
3690                 return 1; /* not supported */
3691
3692         buf = kzalloc(64, GFP_KERNEL);
3693         if (!buf)
3694                 return -ENOMEM;
3695
3696         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
3697                                         HPSA_VPD_LV_DEVICE_ID, buf, 64);
3698         if (rc == 0) {
3699                 if (buflen > 16)
3700                         buflen = 16;
3701                 memcpy(device_id, &buf[8], buflen);
3702         }
3703
3704         kfree(buf);
3705
3706         return rc; /*0 - got id,  otherwise, didn't */
3707 }
3708
3709 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
3710                 void *buf, int bufsize,
3711                 int extended_response)
3712 {
3713         int rc = IO_OK;
3714         struct CommandList *c;
3715         unsigned char scsi3addr[8];
3716         struct ErrorInfo *ei;
3717
3718         c = cmd_alloc(h);
3719
3720         /* address the controller */
3721         memset(scsi3addr, 0, sizeof(scsi3addr));
3722         if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
3723                 buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
3724                 rc = -EAGAIN;
3725                 goto out;
3726         }
3727         if (extended_response)
3728                 c->Request.CDB[1] = extended_response;
3729         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3730                         NO_TIMEOUT);
3731         if (rc)
3732                 goto out;
3733         ei = c->err_info;
3734         if (ei->CommandStatus != 0 &&
3735             ei->CommandStatus != CMD_DATA_UNDERRUN) {
3736                 hpsa_scsi_interpret_error(h, c);
3737                 rc = -EIO;
3738         } else {
3739                 struct ReportLUNdata *rld = buf;
3740
3741                 if (rld->extended_response_flag != extended_response) {
3742                         if (!h->legacy_board) {
3743                                 dev_err(&h->pdev->dev,
3744                                         "report luns requested format %u, got %u\n",
3745                                         extended_response,
3746                                         rld->extended_response_flag);
3747                                 rc = -EINVAL;
3748                         } else
3749                                 rc = -EOPNOTSUPP;
3750                 }
3751         }
3752 out:
3753         cmd_free(h, c);
3754         return rc;
3755 }
3756
3757 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
3758                 struct ReportExtendedLUNdata *buf, int bufsize)
3759 {
3760         int rc;
3761         struct ReportLUNdata *lbuf;
3762
3763         rc = hpsa_scsi_do_report_luns(h, 0, buf, bufsize,
3764                                       HPSA_REPORT_PHYS_EXTENDED);
3765         if (!rc || rc != -EOPNOTSUPP)
3766                 return rc;
3767
3768         /* REPORT PHYS EXTENDED is not supported */
3769         lbuf = kzalloc(sizeof(*lbuf), GFP_KERNEL);
3770         if (!lbuf)
3771                 return -ENOMEM;
3772
3773         rc = hpsa_scsi_do_report_luns(h, 0, lbuf, sizeof(*lbuf), 0);
3774         if (!rc) {
3775                 int i;
3776                 u32 nphys;
3777
3778                 /* Copy ReportLUNdata header */
3779                 memcpy(buf, lbuf, 8);
3780                 nphys = be32_to_cpu(*((__be32 *)lbuf->LUNListLength)) / 8;
3781                 for (i = 0; i < nphys; i++)
3782                         memcpy(buf->LUN[i].lunid, lbuf->LUN[i], 8);
3783         }
3784         kfree(lbuf);
3785         return rc;
3786 }
3787
3788 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
3789                 struct ReportLUNdata *buf, int bufsize)
3790 {
3791         return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
3792 }
3793
3794 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
3795         int bus, int target, int lun)
3796 {
3797         device->bus = bus;
3798         device->target = target;
3799         device->lun = lun;
3800 }
3801
3802 /* Use VPD inquiry to get details of volume status */
3803 static int hpsa_get_volume_status(struct ctlr_info *h,
3804                                         unsigned char scsi3addr[])
3805 {
3806         int rc;
3807         int status;
3808         int size;
3809         unsigned char *buf;
3810
3811         buf = kzalloc(64, GFP_KERNEL);
3812         if (!buf)
3813                 return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3814
3815         /* Does controller have VPD for logical volume status? */
3816         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_STATUS))
3817                 goto exit_failed;
3818
3819         /* Get the size of the VPD return buffer */
3820         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
3821                                         buf, HPSA_VPD_HEADER_SZ);
3822         if (rc != 0)
3823                 goto exit_failed;
3824         size = buf[3];
3825
3826         /* Now get the whole VPD buffer */
3827         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
3828                                         buf, size + HPSA_VPD_HEADER_SZ);
3829         if (rc != 0)
3830                 goto exit_failed;
3831         status = buf[4]; /* status byte */
3832
3833         kfree(buf);
3834         return status;
3835 exit_failed:
3836         kfree(buf);
3837         return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3838 }
3839
3840 /* Determine offline status of a volume.
3841  * Return either:
3842  *  0 (not offline)
3843  *  0xff (offline for unknown reasons)
3844  *  # (integer code indicating one of several NOT READY states
3845  *     describing why a volume is to be kept offline)
3846  */
3847 static unsigned char hpsa_volume_offline(struct ctlr_info *h,
3848                                         unsigned char scsi3addr[])
3849 {
3850         struct CommandList *c;
3851         unsigned char *sense;
3852         u8 sense_key, asc, ascq;
3853         int sense_len;
3854         int rc, ldstat = 0;
3855         u16 cmd_status;
3856         u8 scsi_status;
3857 #define ASC_LUN_NOT_READY 0x04
3858 #define ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS 0x04
3859 #define ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ 0x02
3860
3861         c = cmd_alloc(h);
3862
3863         (void) fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, scsi3addr, TYPE_CMD);
3864         rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
3865                                         NO_TIMEOUT);
3866         if (rc) {
3867                 cmd_free(h, c);
3868                 return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3869         }
3870         sense = c->err_info->SenseInfo;
3871         if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
3872                 sense_len = sizeof(c->err_info->SenseInfo);
3873         else
3874                 sense_len = c->err_info->SenseLen;
3875         decode_sense_data(sense, sense_len, &sense_key, &asc, &ascq);
3876         cmd_status = c->err_info->CommandStatus;
3877         scsi_status = c->err_info->ScsiStatus;
3878         cmd_free(h, c);
3879
3880         /* Determine the reason for not ready state */
3881         ldstat = hpsa_get_volume_status(h, scsi3addr);
3882
3883         /* Keep volume offline in certain cases: */
3884         switch (ldstat) {
3885         case HPSA_LV_FAILED:
3886         case HPSA_LV_UNDERGOING_ERASE:
3887         case HPSA_LV_NOT_AVAILABLE:
3888         case HPSA_LV_UNDERGOING_RPI:
3889         case HPSA_LV_PENDING_RPI:
3890         case HPSA_LV_ENCRYPTED_NO_KEY:
3891         case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
3892         case HPSA_LV_UNDERGOING_ENCRYPTION:
3893         case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
3894         case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
3895                 return ldstat;
3896         case HPSA_VPD_LV_STATUS_UNSUPPORTED:
3897                 /* If VPD status page isn't available,
3898                  * use ASC/ASCQ to determine state
3899                  */
3900                 if ((ascq == ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS) ||
3901                         (ascq == ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ))
3902                         return ldstat;
3903                 break;
3904         default:
3905                 break;
3906         }
3907         return HPSA_LV_OK;
3908 }
3909
3910 static int hpsa_update_device_info(struct ctlr_info *h,
3911         unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
3912         unsigned char *is_OBDR_device)
3913 {
3914
3915 #define OBDR_SIG_OFFSET 43
3916 #define OBDR_TAPE_SIG "$DR-10"
3917 #define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
3918 #define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
3919
3920         unsigned char *inq_buff;
3921         unsigned char *obdr_sig;
3922         int rc = 0;
3923
3924         inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
3925         if (!inq_buff) {
3926                 rc = -ENOMEM;
3927                 goto bail_out;
3928         }
3929
3930         /* Do an inquiry to the device to see what it is. */
3931         if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
3932                 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
3933                 dev_err(&h->pdev->dev,
3934                         "%s: inquiry failed, device will be skipped.\n",
3935                         __func__);
3936                 rc = HPSA_INQUIRY_FAILED;
3937                 goto bail_out;
3938         }
3939
3940         scsi_sanitize_inquiry_string(&inq_buff[8], 8);
3941         scsi_sanitize_inquiry_string(&inq_buff[16], 16);
3942
3943         this_device->devtype = (inq_buff[0] & 0x1f);
3944         memcpy(this_device->scsi3addr, scsi3addr, 8);
3945         memcpy(this_device->vendor, &inq_buff[8],
3946                 sizeof(this_device->vendor));
3947         memcpy(this_device->model, &inq_buff[16],
3948                 sizeof(this_device->model));
3949         this_device->rev = inq_buff[2];
3950         memset(this_device->device_id, 0,
3951                 sizeof(this_device->device_id));
3952         if (hpsa_get_device_id(h, scsi3addr, this_device->device_id, 8,
3953                 sizeof(this_device->device_id)) < 0) {
3954                 dev_err(&h->pdev->dev,
3955                         "hpsa%d: %s: can't get device id for [%d:%d:%d:%d]\t%s\t%.16s\n",
3956                         h->ctlr, __func__,
3957                         h->scsi_host->host_no,
3958                         this_device->bus, this_device->target,
3959                         this_device->lun,
3960                         scsi_device_type(this_device->devtype),
3961                         this_device->model);
3962                 rc = HPSA_LV_FAILED;
3963                 goto bail_out;
3964         }
3965
3966         if ((this_device->devtype == TYPE_DISK ||
3967                 this_device->devtype == TYPE_ZBC) &&
3968                 is_logical_dev_addr_mode(scsi3addr)) {
3969                 unsigned char volume_offline;
3970
3971                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
3972                 if (h->fw_support & MISC_FW_RAID_OFFLOAD_BASIC)
3973                         hpsa_get_ioaccel_status(h, scsi3addr, this_device);
3974                 volume_offline = hpsa_volume_offline(h, scsi3addr);
3975                 if (volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED &&
3976                     h->legacy_board) {
3977                         /*
3978                          * Legacy boards might not support volume status
3979                          */
3980                         dev_info(&h->pdev->dev,
3981                                  "C0:T%d:L%d Volume status not available, assuming online.\n",
3982                                  this_device->target, this_device->lun);
3983                         volume_offline = 0;
3984                 }
3985                 this_device->volume_offline = volume_offline;
3986                 if (volume_offline == HPSA_LV_FAILED) {
3987                         rc = HPSA_LV_FAILED;
3988                         dev_err(&h->pdev->dev,
3989                                 "%s: LV failed, device will be skipped.\n",
3990                                 __func__);
3991                         goto bail_out;
3992                 }
3993         } else {
3994                 this_device->raid_level = RAID_UNKNOWN;
3995                 this_device->offload_config = 0;
3996                 this_device->offload_enabled = 0;
3997                 this_device->offload_to_be_enabled = 0;
3998                 this_device->hba_ioaccel_enabled = 0;
3999                 this_device->volume_offline = 0;
4000                 this_device->queue_depth = h->nr_cmds;
4001         }
4002
4003         if (this_device->external)
4004                 this_device->queue_depth = EXTERNAL_QD;
4005
4006         if (is_OBDR_device) {
4007                 /* See if this is a One-Button-Disaster-Recovery device
4008                  * by looking for "$DR-10" at offset 43 in inquiry data.
4009                  */
4010                 obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
4011                 *is_OBDR_device = (this_device->devtype == TYPE_ROM &&
4012                                         strncmp(obdr_sig, OBDR_TAPE_SIG,
4013                                                 OBDR_SIG_LEN) == 0);
4014         }
4015         kfree(inq_buff);
4016         return 0;
4017
4018 bail_out:
4019         kfree(inq_buff);
4020         return rc;
4021 }
4022
4023 /*
4024  * Helper function to assign bus, target, lun mapping of devices.
4025  * Logical drive target and lun are assigned at this time, but
4026  * physical device lun and target assignment are deferred (assigned
4027  * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
4028 */
4029 static void figure_bus_target_lun(struct ctlr_info *h,
4030         u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
4031 {
4032         u32 lunid = get_unaligned_le32(lunaddrbytes);
4033
4034         if (!is_logical_dev_addr_mode(lunaddrbytes)) {
4035                 /* physical device, target and lun filled in later */
4036                 if (is_hba_lunid(lunaddrbytes)) {
4037                         int bus = HPSA_HBA_BUS;
4038
4039                         if (!device->rev)
4040                                 bus = HPSA_LEGACY_HBA_BUS;
4041                         hpsa_set_bus_target_lun(device,
4042                                         bus, 0, lunid & 0x3fff);
4043                 } else
4044                         /* defer target, lun assignment for physical devices */
4045                         hpsa_set_bus_target_lun(device,
4046                                         HPSA_PHYSICAL_DEVICE_BUS, -1, -1);
4047                 return;
4048         }
4049         /* It's a logical device */
4050         if (device->external) {
4051                 hpsa_set_bus_target_lun(device,
4052                         HPSA_EXTERNAL_RAID_VOLUME_BUS, (lunid >> 16) & 0x3fff,
4053                         lunid & 0x00ff);
4054                 return;
4055         }
4056         hpsa_set_bus_target_lun(device, HPSA_RAID_VOLUME_BUS,
4057                                 0, lunid & 0x3fff);
4058 }
4059
4060 static int  figure_external_status(struct ctlr_info *h, int raid_ctlr_position,
4061         int i, int nphysicals, int nlocal_logicals)
4062 {
4063         /* In report logicals, local logicals are listed first,
4064         * then any externals.
4065         */
4066         int logicals_start = nphysicals + (raid_ctlr_position == 0);
4067
4068         if (i == raid_ctlr_position)
4069                 return 0;
4070
4071         if (i < logicals_start)
4072                 return 0;
4073
4074         /* i is in logicals range, but still within local logicals */
4075         if ((i - nphysicals - (raid_ctlr_position == 0)) < nlocal_logicals)
4076                 return 0;
4077
4078         return 1; /* it's an external lun */
4079 }
4080
4081 /*
4082  * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
4083  * logdev.  The number of luns in physdev and logdev are returned in
4084  * *nphysicals and *nlogicals, respectively.
4085  * Returns 0 on success, -1 otherwise.
4086  */
4087 static int hpsa_gather_lun_info(struct ctlr_info *h,
4088         struct ReportExtendedLUNdata *physdev, u32 *nphysicals,
4089         struct ReportLUNdata *logdev, u32 *nlogicals)
4090 {
4091         if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
4092                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
4093                 return -1;
4094         }
4095         *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 24;
4096         if (*nphysicals > HPSA_MAX_PHYS_LUN) {
4097                 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded. %d LUNs ignored.\n",
4098                         HPSA_MAX_PHYS_LUN, *nphysicals - HPSA_MAX_PHYS_LUN);
4099                 *nphysicals = HPSA_MAX_PHYS_LUN;
4100         }
4101         if (hpsa_scsi_do_report_log_luns(h, logdev, sizeof(*logdev))) {
4102                 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
4103                 return -1;
4104         }
4105         *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
4106         /* Reject Logicals in excess of our max capability. */
4107         if (*nlogicals > HPSA_MAX_LUN) {
4108                 dev_warn(&h->pdev->dev,
4109                         "maximum logical LUNs (%d) exceeded.  "
4110                         "%d LUNs ignored.\n", HPSA_MAX_LUN,
4111                         *nlogicals - HPSA_MAX_LUN);
4112                 *nlogicals = HPSA_MAX_LUN;
4113         }
4114         if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
4115                 dev_warn(&h->pdev->dev,
4116                         "maximum logical + physical LUNs (%d) exceeded. "
4117                         "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
4118                         *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
4119                 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
4120         }
4121         return 0;
4122 }
4123
4124 static u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position,
4125         int i, int nphysicals, int nlogicals,
4126         struct ReportExtendedLUNdata *physdev_list,
4127         struct ReportLUNdata *logdev_list)
4128 {
4129         /* Helper function, figure out where the LUN ID info is coming from
4130          * given index i, lists of physical and logical devices, where in
4131          * the list the raid controller is supposed to appear (first or last)
4132          */
4133
4134         int logicals_start = nphysicals + (raid_ctlr_position == 0);
4135         int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
4136
4137         if (i == raid_ctlr_position)
4138                 return RAID_CTLR_LUNID;
4139
4140         if (i < logicals_start)
4141                 return &physdev_list->LUN[i -
4142                                 (raid_ctlr_position == 0)].lunid[0];
4143
4144         if (i < last_device)
4145                 return &logdev_list->LUN[i - nphysicals -
4146                         (raid_ctlr_position == 0)][0];
4147         BUG();
4148         return NULL;
4149 }
4150
4151 /* get physical drive ioaccel handle and queue depth */
4152 static void hpsa_get_ioaccel_drive_info(struct ctlr_info *h,
4153                 struct hpsa_scsi_dev_t *dev,
4154                 struct ReportExtendedLUNdata *rlep, int rle_index,
4155                 struct bmic_identify_physical_device *id_phys)
4156 {
4157         int rc;
4158         struct ext_report_lun_entry *rle;
4159
4160         rle = &rlep->LUN[rle_index];
4161
4162         dev->ioaccel_handle = rle->ioaccel_handle;
4163         if ((rle->device_flags & 0x08) && dev->ioaccel_handle)
4164                 dev->hba_ioaccel_enabled = 1;
4165         memset(id_phys, 0, sizeof(*id_phys));
4166         rc = hpsa_bmic_id_physical_device(h, &rle->lunid[0],
4167                         GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]), id_phys,
4168                         sizeof(*id_phys));
4169         if (!rc)
4170                 /* Reserve space for FW operations */
4171 #define DRIVE_CMDS_RESERVED_FOR_FW 2
4172 #define DRIVE_QUEUE_DEPTH 7
4173                 dev->queue_depth =
4174                         le16_to_cpu(id_phys->current_queue_depth_limit) -
4175                                 DRIVE_CMDS_RESERVED_FOR_FW;
4176         else
4177                 dev->queue_depth = DRIVE_QUEUE_DEPTH; /* conservative */
4178 }
4179
4180 static void hpsa_get_path_info(struct hpsa_scsi_dev_t *this_device,
4181         struct ReportExtendedLUNdata *rlep, int rle_index,
4182         struct bmic_identify_physical_device *id_phys)
4183 {
4184         struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
4185
4186         if ((rle->device_flags & 0x08) && this_device->ioaccel_handle)
4187                 this_device->hba_ioaccel_enabled = 1;
4188
4189         memcpy(&this_device->active_path_index,
4190                 &id_phys->active_path_number,
4191                 sizeof(this_device->active_path_index));
4192         memcpy(&this_device->path_map,
4193                 &id_phys->redundant_path_present_map,
4194                 sizeof(this_device->path_map));
4195         memcpy(&this_device->box,
4196                 &id_phys->alternate_paths_phys_box_on_port,
4197                 sizeof(this_device->box));
4198         memcpy(&this_device->phys_connector,
4199                 &id_phys->alternate_paths_phys_connector,
4200                 sizeof(this_device->phys_connector));
4201         memcpy(&this_device->bay,
4202                 &id_phys->phys_bay_in_box,
4203                 sizeof(this_device->bay));
4204 }
4205
4206 /* get number of local logical disks. */
4207 static int hpsa_set_local_logical_count(struct ctlr_info *h,
4208         struct bmic_identify_controller *id_ctlr,
4209         u32 *nlocals)
4210 {
4211         int rc;
4212
4213         if (!id_ctlr) {
4214                 dev_warn(&h->pdev->dev, "%s: id_ctlr buffer is NULL.\n",
4215                         __func__);
4216                 return -ENOMEM;
4217         }
4218         memset(id_ctlr, 0, sizeof(*id_ctlr));
4219         rc = hpsa_bmic_id_controller(h, id_ctlr, sizeof(*id_ctlr));
4220         if (!rc)
4221                 if (id_ctlr->configured_logical_drive_count < 255)
4222                         *nlocals = id_ctlr->configured_logical_drive_count;
4223                 else
4224                         *nlocals = le16_to_cpu(
4225                                         id_ctlr->extended_logical_unit_count);
4226         else
4227                 *nlocals = -1;
4228         return rc;
4229 }
4230
4231 static bool hpsa_is_disk_spare(struct ctlr_info *h, u8 *lunaddrbytes)
4232 {
4233         struct bmic_identify_physical_device *id_phys;
4234         bool is_spare = false;
4235         int rc;
4236
4237         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
4238         if (!id_phys)
4239                 return false;
4240
4241         rc = hpsa_bmic_id_physical_device(h,
4242                                         lunaddrbytes,
4243                                         GET_BMIC_DRIVE_NUMBER(lunaddrbytes),
4244                                         id_phys, sizeof(*id_phys));
4245         if (rc == 0)
4246                 is_spare = (id_phys->more_flags >> 6) & 0x01;
4247
4248         kfree(id_phys);
4249         return is_spare;
4250 }
4251
4252 #define RPL_DEV_FLAG_NON_DISK                           0x1
4253 #define RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED  0x2
4254 #define RPL_DEV_FLAG_UNCONFIG_DISK                      0x4
4255
4256 #define BMIC_DEVICE_TYPE_ENCLOSURE  6
4257
4258 static bool hpsa_skip_device(struct ctlr_info *h, u8 *lunaddrbytes,
4259                                 struct ext_report_lun_entry *rle)
4260 {
4261         u8 device_flags;
4262         u8 device_type;
4263
4264         if (!MASKED_DEVICE(lunaddrbytes))
4265                 return false;
4266
4267         device_flags = rle->device_flags;
4268         device_type = rle->device_type;
4269
4270         if (device_flags & RPL_DEV_FLAG_NON_DISK) {
4271                 if (device_type == BMIC_DEVICE_TYPE_ENCLOSURE)
4272                         return false;
4273                 return true;
4274         }
4275
4276         if (!(device_flags & RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED))
4277                 return false;
4278
4279         if (device_flags & RPL_DEV_FLAG_UNCONFIG_DISK)
4280                 return false;
4281
4282         /*
4283          * Spares may be spun down, we do not want to
4284          * do an Inquiry to a RAID set spare drive as
4285          * that would have them spun up, that is a
4286          * performance hit because I/O to the RAID device
4287          * stops while the spin up occurs which can take
4288          * over 50 seconds.
4289          */
4290         if (hpsa_is_disk_spare(h, lunaddrbytes))
4291                 return true;
4292
4293         return false;
4294 }
4295
4296 static void hpsa_update_scsi_devices(struct ctlr_info *h)
4297 {
4298         /* the idea here is we could get notified
4299          * that some devices have changed, so we do a report
4300          * physical luns and report logical luns cmd, and adjust
4301          * our list of devices accordingly.
4302          *
4303          * The scsi3addr's of devices won't change so long as the
4304          * adapter is not reset.  That means we can rescan and
4305          * tell which devices we already know about, vs. new
4306          * devices, vs.  disappearing devices.
4307          */
4308         struct ReportExtendedLUNdata *physdev_list = NULL;
4309         struct ReportLUNdata *logdev_list = NULL;
4310         struct bmic_identify_physical_device *id_phys = NULL;
4311         struct bmic_identify_controller *id_ctlr = NULL;
4312         u32 nphysicals = 0;
4313         u32 nlogicals = 0;
4314         u32 nlocal_logicals = 0;
4315         u32 ndev_allocated = 0;
4316         struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
4317         int ncurrent = 0;
4318         int i, n_ext_target_devs, ndevs_to_allocate;
4319         int raid_ctlr_position;
4320         bool physical_device;
4321         DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
4322
4323         currentsd = kcalloc(HPSA_MAX_DEVICES, sizeof(*currentsd), GFP_KERNEL);
4324         physdev_list = kzalloc(sizeof(*physdev_list), GFP_KERNEL);
4325         logdev_list = kzalloc(sizeof(*logdev_list), GFP_KERNEL);
4326         tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
4327         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
4328         id_ctlr = kzalloc(sizeof(*id_ctlr), GFP_KERNEL);
4329
4330         if (!currentsd || !physdev_list || !logdev_list ||
4331                 !tmpdevice || !id_phys || !id_ctlr) {
4332                 dev_err(&h->pdev->dev, "out of memory\n");
4333                 goto out;
4334         }
4335         memset(lunzerobits, 0, sizeof(lunzerobits));
4336
4337         h->drv_req_rescan = 0; /* cancel scheduled rescan - we're doing it. */
4338
4339         if (hpsa_gather_lun_info(h, physdev_list, &nphysicals,
4340                         logdev_list, &nlogicals)) {
4341                 h->drv_req_rescan = 1;
4342                 goto out;
4343         }
4344
4345         /* Set number of local logicals (non PTRAID) */
4346         if (hpsa_set_local_logical_count(h, id_ctlr, &nlocal_logicals)) {
4347                 dev_warn(&h->pdev->dev,
4348                         "%s: Can't determine number of local logical devices.\n",
4349                         __func__);
4350         }
4351
4352         /* We might see up to the maximum number of logical and physical disks
4353          * plus external target devices, and a device for the local RAID
4354          * controller.
4355          */
4356         ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
4357
4358         hpsa_ext_ctrl_present(h, physdev_list);
4359
4360         /* Allocate the per device structures */
4361         for (i = 0; i < ndevs_to_allocate; i++) {
4362                 if (i >= HPSA_MAX_DEVICES) {
4363                         dev_warn(&h->pdev->dev, "maximum devices (%d) exceeded."
4364                                 "  %d devices ignored.\n", HPSA_MAX_DEVICES,
4365                                 ndevs_to_allocate - HPSA_MAX_DEVICES);
4366                         break;
4367                 }
4368
4369                 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
4370                 if (!currentsd[i]) {
4371                         h->drv_req_rescan = 1;
4372                         goto out;
4373                 }
4374                 ndev_allocated++;
4375         }
4376
4377         if (is_scsi_rev_5(h))
4378                 raid_ctlr_position = 0;
4379         else
4380                 raid_ctlr_position = nphysicals + nlogicals;
4381
4382         /* adjust our table of devices */
4383         n_ext_target_devs = 0;
4384         for (i = 0; i < nphysicals + nlogicals + 1; i++) {
4385                 u8 *lunaddrbytes, is_OBDR = 0;
4386                 int rc = 0;
4387                 int phys_dev_index = i - (raid_ctlr_position == 0);
4388                 bool skip_device = false;
4389
4390                 memset(tmpdevice, 0, sizeof(*tmpdevice));
4391
4392                 physical_device = i < nphysicals + (raid_ctlr_position == 0);
4393
4394                 /* Figure out where the LUN ID info is coming from */
4395                 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
4396                         i, nphysicals, nlogicals, physdev_list, logdev_list);
4397
4398                 /* Determine if this is a lun from an external target array */
4399                 tmpdevice->external =
4400                         figure_external_status(h, raid_ctlr_position, i,
4401                                                 nphysicals, nlocal_logicals);
4402
4403                 /*
4404                  * Skip over some devices such as a spare.
4405                  */
4406                 if (!tmpdevice->external && physical_device) {
4407                         skip_device = hpsa_skip_device(h, lunaddrbytes,
4408                                         &physdev_list->LUN[phys_dev_index]);
4409                         if (skip_device)
4410                                 continue;
4411                 }
4412
4413                 /* Get device type, vendor, model, device id, raid_map */
4414                 rc = hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
4415                                                         &is_OBDR);
4416                 if (rc == -ENOMEM) {
4417                         dev_warn(&h->pdev->dev,
4418                                 "Out of memory, rescan deferred.\n");
4419                         h->drv_req_rescan = 1;
4420                         goto out;
4421                 }
4422                 if (rc) {
4423                         h->drv_req_rescan = 1;
4424                         continue;
4425                 }
4426
4427                 figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
4428                 this_device = currentsd[ncurrent];
4429
4430                 *this_device = *tmpdevice;
4431                 this_device->physical_device = physical_device;
4432
4433                 /*
4434                  * Expose all devices except for physical devices that
4435                  * are masked.
4436                  */
4437                 if (MASKED_DEVICE(lunaddrbytes) && this_device->physical_device)
4438                         this_device->expose_device = 0;
4439                 else
4440                         this_device->expose_device = 1;
4441
4442
4443                 /*
4444                  * Get the SAS address for physical devices that are exposed.
4445                  */
4446                 if (this_device->physical_device && this_device->expose_device)
4447                         hpsa_get_sas_address(h, lunaddrbytes, this_device);
4448
4449                 switch (this_device->devtype) {
4450                 case TYPE_ROM:
4451                         /* We don't *really* support actual CD-ROM devices,
4452                          * just "One Button Disaster Recovery" tape drive
4453                          * which temporarily pretends to be a CD-ROM drive.
4454                          * So we check that the device is really an OBDR tape
4455                          * device by checking for "$DR-10" in bytes 43-48 of
4456                          * the inquiry data.
4457                          */
4458                         if (is_OBDR)
4459                                 ncurrent++;
4460                         break;
4461                 case TYPE_DISK:
4462                 case TYPE_ZBC:
4463                         if (this_device->physical_device) {
4464                                 /* The disk is in HBA mode. */
4465                                 /* Never use RAID mapper in HBA mode. */
4466                                 this_device->offload_enabled = 0;
4467                                 hpsa_get_ioaccel_drive_info(h, this_device,
4468                                         physdev_list, phys_dev_index, id_phys);
4469                                 hpsa_get_path_info(this_device,
4470                                         physdev_list, phys_dev_index, id_phys);
4471                         }
4472                         ncurrent++;
4473                         break;
4474                 case TYPE_TAPE:
4475                 case TYPE_MEDIUM_CHANGER:
4476                         ncurrent++;
4477                         break;
4478                 case TYPE_ENCLOSURE:
4479                         if (!this_device->external)
4480                                 hpsa_get_enclosure_info(h, lunaddrbytes,
4481                                                 physdev_list, phys_dev_index,
4482                                                 this_device);
4483                         ncurrent++;
4484                         break;
4485                 case TYPE_RAID:
4486                         /* Only present the Smartarray HBA as a RAID controller.
4487                          * If it's a RAID controller other than the HBA itself
4488                          * (an external RAID controller, MSA500 or similar)
4489                          * don't present it.
4490                          */
4491                         if (!is_hba_lunid(lunaddrbytes))
4492                                 break;
4493                         ncurrent++;
4494                         break;
4495                 default:
4496                         break;
4497                 }
4498                 if (ncurrent >= HPSA_MAX_DEVICES)
4499                         break;
4500         }
4501
4502         if (h->sas_host == NULL) {
4503                 int rc = 0;
4504
4505                 rc = hpsa_add_sas_host(h);
4506                 if (rc) {
4507                         dev_warn(&h->pdev->dev,
4508                                 "Could not add sas host %d\n", rc);
4509                         goto out;
4510                 }
4511         }
4512
4513         adjust_hpsa_scsi_table(h, currentsd, ncurrent);
4514 out:
4515         kfree(tmpdevice);
4516         for (i = 0; i < ndev_allocated; i++)
4517                 kfree(currentsd[i]);
4518         kfree(currentsd);
4519         kfree(physdev_list);
4520         kfree(logdev_list);
4521         kfree(id_ctlr);
4522         kfree(id_phys);
4523 }
4524
4525 static void hpsa_set_sg_descriptor(struct SGDescriptor *desc,
4526                                    struct scatterlist *sg)
4527 {
4528         u64 addr64 = (u64) sg_dma_address(sg);
4529         unsigned int len = sg_dma_len(sg);
4530
4531         desc->Addr = cpu_to_le64(addr64);
4532         desc->Len = cpu_to_le32(len);
4533         desc->Ext = 0;
4534 }
4535
4536 /*
4537  * hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
4538  * dma mapping  and fills in the scatter gather entries of the
4539  * hpsa command, cp.
4540  */
4541 static int hpsa_scatter_gather(struct ctlr_info *h,
4542                 struct CommandList *cp,
4543                 struct scsi_cmnd *cmd)
4544 {
4545         struct scatterlist *sg;
4546         int use_sg, i, sg_limit, chained, last_sg;
4547         struct SGDescriptor *curr_sg;
4548
4549         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4550
4551         use_sg = scsi_dma_map(cmd);
4552         if (use_sg < 0)
4553                 return use_sg;
4554
4555         if (!use_sg)
4556                 goto sglist_finished;
4557
4558         /*
4559          * If the number of entries is greater than the max for a single list,
4560          * then we have a chained list; we will set up all but one entry in the
4561          * first list (the last entry is saved for link information);
4562          * otherwise, we don't have a chained list and we'll set up at each of
4563          * the entries in the one list.
4564          */
4565         curr_sg = cp->SG;
4566         chained = use_sg > h->max_cmd_sg_entries;
4567         sg_limit = chained ? h->max_cmd_sg_entries - 1 : use_sg;
4568         last_sg = scsi_sg_count(cmd) - 1;
4569         scsi_for_each_sg(cmd, sg, sg_limit, i) {
4570                 hpsa_set_sg_descriptor(curr_sg, sg);
4571                 curr_sg++;
4572         }
4573
4574         if (chained) {
4575                 /*
4576                  * Continue with the chained list.  Set curr_sg to the chained
4577                  * list.  Modify the limit to the total count less the entries
4578                  * we've already set up.  Resume the scan at the list entry
4579                  * where the previous loop left off.
4580                  */
4581                 curr_sg = h->cmd_sg_list[cp->cmdindex];
4582                 sg_limit = use_sg - sg_limit;
4583                 for_each_sg(sg, sg, sg_limit, i) {
4584                         hpsa_set_sg_descriptor(curr_sg, sg);
4585                         curr_sg++;
4586                 }
4587         }
4588
4589         /* Back the pointer up to the last entry and mark it as "last". */
4590         (curr_sg - 1)->Ext = cpu_to_le32(HPSA_SG_LAST);
4591
4592         if (use_sg + chained > h->maxSG)
4593                 h->maxSG = use_sg + chained;
4594
4595         if (chained) {
4596                 cp->Header.SGList = h->max_cmd_sg_entries;
4597                 cp->Header.SGTotal = cpu_to_le16(use_sg + 1);
4598                 if (hpsa_map_sg_chain_block(h, cp)) {
4599                         scsi_dma_unmap(cmd);
4600                         return -1;
4601                 }
4602                 return 0;
4603         }
4604
4605 sglist_finished:
4606
4607         cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
4608         cp->Header.SGTotal = cpu_to_le16(use_sg); /* total sgs in cmd list */
4609         return 0;
4610 }
4611
4612 static inline void warn_zero_length_transfer(struct ctlr_info *h,
4613                                                 u8 *cdb, int cdb_len,
4614                                                 const char *func)
4615 {
4616         dev_warn(&h->pdev->dev,
4617                  "%s: Blocking zero-length request: CDB:%*phN\n",
4618                  func, cdb_len, cdb);
4619 }
4620
4621 #define IO_ACCEL_INELIGIBLE 1
4622 /* zero-length transfers trigger hardware errors. */
4623 static bool is_zero_length_transfer(u8 *cdb)
4624 {
4625         u32 block_cnt;
4626
4627         /* Block zero-length transfer sizes on certain commands. */
4628         switch (cdb[0]) {
4629         case READ_10:
4630         case WRITE_10:
4631         case VERIFY:            /* 0x2F */
4632         case WRITE_VERIFY:      /* 0x2E */
4633                 block_cnt = get_unaligned_be16(&cdb[7]);
4634                 break;
4635         case READ_12:
4636         case WRITE_12:
4637         case VERIFY_12: /* 0xAF */
4638         case WRITE_VERIFY_12:   /* 0xAE */
4639                 block_cnt = get_unaligned_be32(&cdb[6]);
4640                 break;
4641         case READ_16:
4642         case WRITE_16:
4643         case VERIFY_16:         /* 0x8F */
4644                 block_cnt = get_unaligned_be32(&cdb[10]);
4645                 break;
4646         default:
4647                 return false;
4648         }
4649
4650         return block_cnt == 0;
4651 }
4652
4653 static int fixup_ioaccel_cdb(u8 *cdb, int *cdb_len)
4654 {
4655         int is_write = 0;
4656         u32 block;
4657         u32 block_cnt;
4658
4659         /* Perform some CDB fixups if needed using 10 byte reads/writes only */
4660         switch (cdb[0]) {
4661         case WRITE_6:
4662         case WRITE_12:
4663                 is_write = 1;
4664                 /* fall through */
4665         case READ_6:
4666         case READ_12:
4667                 if (*cdb_len == 6) {
4668                         block = (((cdb[1] & 0x1F) << 16) |
4669                                 (cdb[2] << 8) |
4670                                 cdb[3]);
4671                         block_cnt = cdb[4];
4672                         if (block_cnt == 0)
4673                                 block_cnt = 256;
4674                 } else {
4675                         BUG_ON(*cdb_len != 12);
4676                         block = get_unaligned_be32(&cdb[2]);
4677                         block_cnt = get_unaligned_be32(&cdb[6]);
4678                 }
4679                 if (block_cnt > 0xffff)
4680                         return IO_ACCEL_INELIGIBLE;
4681
4682                 cdb[0] = is_write ? WRITE_10 : READ_10;
4683                 cdb[1] = 0;
4684                 cdb[2] = (u8) (block >> 24);
4685                 cdb[3] = (u8) (block >> 16);
4686                 cdb[4] = (u8) (block >> 8);
4687                 cdb[5] = (u8) (block);
4688                 cdb[6] = 0;
4689                 cdb[7] = (u8) (block_cnt >> 8);
4690                 cdb[8] = (u8) (block_cnt);
4691                 cdb[9] = 0;
4692                 *cdb_len = 10;
4693                 break;
4694         }
4695         return 0;
4696 }
4697
4698 static int hpsa_scsi_ioaccel1_queue_command(struct ctlr_info *h,
4699         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4700         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4701 {
4702         struct scsi_cmnd *cmd = c->scsi_cmd;
4703         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
4704         unsigned int len;
4705         unsigned int total_len = 0;
4706         struct scatterlist *sg;
4707         u64 addr64;
4708         int use_sg, i;
4709         struct SGDescriptor *curr_sg;
4710         u32 control = IOACCEL1_CONTROL_SIMPLEQUEUE;
4711
4712         /* TODO: implement chaining support */
4713         if (scsi_sg_count(cmd) > h->ioaccel_maxsg) {
4714                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4715                 return IO_ACCEL_INELIGIBLE;
4716         }
4717
4718         BUG_ON(cmd->cmd_len > IOACCEL1_IOFLAGS_CDBLEN_MAX);
4719
4720         if (is_zero_length_transfer(cdb)) {
4721                 warn_zero_length_transfer(h, cdb, cdb_len, __func__);
4722                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4723                 return IO_ACCEL_INELIGIBLE;
4724         }
4725
4726         if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
4727                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4728                 return IO_ACCEL_INELIGIBLE;
4729         }
4730
4731         c->cmd_type = CMD_IOACCEL1;
4732
4733         /* Adjust the DMA address to point to the accelerated command buffer */
4734         c->busaddr = (u32) h->ioaccel_cmd_pool_dhandle +
4735                                 (c->cmdindex * sizeof(*cp));
4736         BUG_ON(c->busaddr & 0x0000007F);
4737
4738         use_sg = scsi_dma_map(cmd);
4739         if (use_sg < 0) {
4740                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4741                 return use_sg;
4742         }
4743
4744         if (use_sg) {
4745                 curr_sg = cp->SG;
4746                 scsi_for_each_sg(cmd, sg, use_sg, i) {
4747                         addr64 = (u64) sg_dma_address(sg);
4748                         len  = sg_dma_len(sg);
4749                         total_len += len;
4750                         curr_sg->Addr = cpu_to_le64(addr64);
4751                         curr_sg->Len = cpu_to_le32(len);
4752                         curr_sg->Ext = cpu_to_le32(0);
4753                         curr_sg++;
4754                 }
4755                 (--curr_sg)->Ext = cpu_to_le32(HPSA_SG_LAST);
4756
4757                 switch (cmd->sc_data_direction) {
4758                 case DMA_TO_DEVICE:
4759                         control |= IOACCEL1_CONTROL_DATA_OUT;
4760                         break;
4761                 case DMA_FROM_DEVICE:
4762                         control |= IOACCEL1_CONTROL_DATA_IN;
4763                         break;
4764                 case DMA_NONE:
4765                         control |= IOACCEL1_CONTROL_NODATAXFER;
4766                         break;
4767                 default:
4768                         dev_err(&h->pdev->dev, "unknown data direction: %d\n",
4769                         cmd->sc_data_direction);
4770                         BUG();
4771                         break;
4772                 }
4773         } else {
4774                 control |= IOACCEL1_CONTROL_NODATAXFER;
4775         }
4776
4777         c->Header.SGList = use_sg;
4778         /* Fill out the command structure to submit */
4779         cp->dev_handle = cpu_to_le16(ioaccel_handle & 0xFFFF);
4780         cp->transfer_len = cpu_to_le32(total_len);
4781         cp->io_flags = cpu_to_le16(IOACCEL1_IOFLAGS_IO_REQ |
4782                         (cdb_len & IOACCEL1_IOFLAGS_CDBLEN_MASK));
4783         cp->control = cpu_to_le32(control);
4784         memcpy(cp->CDB, cdb, cdb_len);
4785         memcpy(cp->CISS_LUN, scsi3addr, 8);
4786         /* Tag was already set at init time. */
4787         enqueue_cmd_and_start_io(h, c);
4788         return 0;
4789 }
4790
4791 /*
4792  * Queue a command directly to a device behind the controller using the
4793  * I/O accelerator path.
4794  */
4795 static int hpsa_scsi_ioaccel_direct_map(struct ctlr_info *h,
4796         struct CommandList *c)
4797 {
4798         struct scsi_cmnd *cmd = c->scsi_cmd;
4799         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
4800
4801         if (!dev)
4802                 return -1;
4803
4804         c->phys_disk = dev;
4805
4806         if (dev->in_reset)
4807                 return -1;
4808
4809         return hpsa_scsi_ioaccel_queue_command(h, c, dev->ioaccel_handle,
4810                 cmd->cmnd, cmd->cmd_len, dev->scsi3addr, dev);
4811 }
4812
4813 /*
4814  * Set encryption parameters for the ioaccel2 request
4815  */
4816 static void set_encrypt_ioaccel2(struct ctlr_info *h,
4817         struct CommandList *c, struct io_accel2_cmd *cp)
4818 {
4819         struct scsi_cmnd *cmd = c->scsi_cmd;
4820         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
4821         struct raid_map_data *map = &dev->raid_map;
4822         u64 first_block;
4823
4824         /* Are we doing encryption on this device */
4825         if (!(le16_to_cpu(map->flags) & RAID_MAP_FLAG_ENCRYPT_ON))
4826                 return;
4827         /* Set the data encryption key index. */
4828         cp->dekindex = map->dekindex;
4829
4830         /* Set the encryption enable flag, encoded into direction field. */
4831         cp->direction |= IOACCEL2_DIRECTION_ENCRYPT_MASK;
4832
4833         /* Set encryption tweak values based on logical block address
4834          * If block size is 512, tweak value is LBA.
4835          * For other block sizes, tweak is (LBA * block size)/ 512)
4836          */
4837         switch (cmd->cmnd[0]) {
4838         /* Required? 6-byte cdbs eliminated by fixup_ioaccel_cdb */
4839         case READ_6:
4840         case WRITE_6:
4841                 first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
4842                                 (cmd->cmnd[2] << 8) |
4843                                 cmd->cmnd[3]);
4844                 break;
4845         case WRITE_10:
4846         case READ_10:
4847         /* Required? 12-byte cdbs eliminated by fixup_ioaccel_cdb */
4848         case WRITE_12:
4849         case READ_12:
4850                 first_block = get_unaligned_be32(&cmd->cmnd[2]);
4851                 break;
4852         case WRITE_16:
4853         case READ_16:
4854                 first_block = get_unaligned_be64(&cmd->cmnd[2]);
4855                 break;
4856         default:
4857                 dev_err(&h->pdev->dev,
4858                         "ERROR: %s: size (0x%x) not supported for encryption\n",
4859                         __func__, cmd->cmnd[0]);
4860                 BUG();
4861                 break;
4862         }
4863
4864         if (le32_to_cpu(map->volume_blk_size) != 512)
4865                 first_block = first_block *
4866                                 le32_to_cpu(map->volume_blk_size)/512;
4867
4868         cp->tweak_lower = cpu_to_le32(first_block);
4869         cp->tweak_upper = cpu_to_le32(first_block >> 32);
4870 }
4871
4872 static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
4873         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4874         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4875 {
4876         struct scsi_cmnd *cmd = c->scsi_cmd;
4877         struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
4878         struct ioaccel2_sg_element *curr_sg;
4879         int use_sg, i;
4880         struct scatterlist *sg;
4881         u64 addr64;
4882         u32 len;
4883         u32 total_len = 0;
4884
4885         if (!cmd->device)
4886                 return -1;
4887
4888         if (!cmd->device->hostdata)
4889                 return -1;
4890
4891         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4892
4893         if (is_zero_length_transfer(cdb)) {
4894                 warn_zero_length_transfer(h, cdb, cdb_len, __func__);
4895                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4896                 return IO_ACCEL_INELIGIBLE;
4897         }
4898
4899         if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
4900                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4901                 return IO_ACCEL_INELIGIBLE;
4902         }
4903
4904         c->cmd_type = CMD_IOACCEL2;
4905         /* Adjust the DMA address to point to the accelerated command buffer */
4906         c->busaddr = (u32) h->ioaccel2_cmd_pool_dhandle +
4907                                 (c->cmdindex * sizeof(*cp));
4908         BUG_ON(c->busaddr & 0x0000007F);
4909
4910         memset(cp, 0, sizeof(*cp));
4911         cp->IU_type = IOACCEL2_IU_TYPE;
4912
4913         use_sg = scsi_dma_map(cmd);
4914         if (use_sg < 0) {
4915                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4916                 return use_sg;
4917         }
4918
4919         if (use_sg) {
4920                 curr_sg = cp->sg;
4921                 if (use_sg > h->ioaccel_maxsg) {
4922                         addr64 = le64_to_cpu(
4923                                 h->ioaccel2_cmd_sg_list[c->cmdindex]->address);
4924                         curr_sg->address = cpu_to_le64(addr64);
4925                         curr_sg->length = 0;
4926                         curr_sg->reserved[0] = 0;
4927                         curr_sg->reserved[1] = 0;
4928                         curr_sg->reserved[2] = 0;
4929                         curr_sg->chain_indicator = 0x80;
4930
4931                         curr_sg = h->ioaccel2_cmd_sg_list[c->cmdindex];
4932                 }
4933                 scsi_for_each_sg(cmd, sg, use_sg, i) {
4934                         addr64 = (u64) sg_dma_address(sg);
4935                         len  = sg_dma_len(sg);
4936                         total_len += len;
4937                         curr_sg->address = cpu_to_le64(addr64);
4938                         curr_sg->length = cpu_to_le32(len);
4939                         curr_sg->reserved[0] = 0;
4940                         curr_sg->reserved[1] = 0;
4941                         curr_sg->reserved[2] = 0;
4942                         curr_sg->chain_indicator = 0;
4943                         curr_sg++;
4944                 }
4945
4946                 switch (cmd->sc_data_direction) {
4947                 case DMA_TO_DEVICE:
4948                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4949                         cp->direction |= IOACCEL2_DIR_DATA_OUT;
4950                         break;
4951                 case DMA_FROM_DEVICE:
4952                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4953                         cp->direction |= IOACCEL2_DIR_DATA_IN;
4954                         break;
4955                 case DMA_NONE:
4956                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4957                         cp->direction |= IOACCEL2_DIR_NO_DATA;
4958                         break;
4959                 default:
4960                         dev_err(&h->pdev->dev, "unknown data direction: %d\n",
4961                                 cmd->sc_data_direction);
4962                         BUG();
4963                         break;
4964                 }
4965         } else {
4966                 cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4967                 cp->direction |= IOACCEL2_DIR_NO_DATA;
4968         }
4969
4970         /* Set encryption parameters, if necessary */
4971         set_encrypt_ioaccel2(h, c, cp);
4972
4973         cp->scsi_nexus = cpu_to_le32(ioaccel_handle);
4974         cp->Tag = cpu_to_le32(c->cmdindex << DIRECT_LOOKUP_SHIFT);
4975         memcpy(cp->cdb, cdb, sizeof(cp->cdb));
4976
4977         cp->data_len = cpu_to_le32(total_len);
4978         cp->err_ptr = cpu_to_le64(c->busaddr +
4979                         offsetof(struct io_accel2_cmd, error_data));
4980         cp->err_len = cpu_to_le32(sizeof(cp->error_data));
4981
4982         /* fill in sg elements */
4983         if (use_sg > h->ioaccel_maxsg) {
4984                 cp->sg_count = 1;
4985                 cp->sg[0].length = cpu_to_le32(use_sg * sizeof(cp->sg[0]));
4986                 if (hpsa_map_ioaccel2_sg_chain_block(h, cp, c)) {
4987                         atomic_dec(&phys_disk->ioaccel_cmds_out);
4988                         scsi_dma_unmap(cmd);
4989                         return -1;
4990                 }
4991         } else
4992                 cp->sg_count = (u8) use_sg;
4993
4994         if (phys_disk->in_reset) {
4995                 cmd->result = DID_RESET << 16;
4996                 return -1;
4997         }
4998
4999         enqueue_cmd_and_start_io(h, c);
5000         return 0;
5001 }
5002
5003 /*
5004  * Queue a command to the correct I/O accelerator path.
5005  */
5006 static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
5007         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
5008         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
5009 {
5010         if (!c->scsi_cmd->device)
5011                 return -1;
5012
5013         if (!c->scsi_cmd->device->hostdata)
5014                 return -1;
5015
5016         if (phys_disk->in_reset)
5017                 return -1;
5018
5019         /* Try to honor the device's queue depth */
5020         if (atomic_inc_return(&phys_disk->ioaccel_cmds_out) >
5021                                         phys_disk->queue_depth) {
5022                 atomic_dec(&phys_disk->ioaccel_cmds_out);
5023                 return IO_ACCEL_INELIGIBLE;
5024         }
5025         if (h->transMethod & CFGTBL_Trans_io_accel1)
5026                 return hpsa_scsi_ioaccel1_queue_command(h, c, ioaccel_handle,
5027                                                 cdb, cdb_len, scsi3addr,
5028                                                 phys_disk);
5029         else
5030                 return hpsa_scsi_ioaccel2_queue_command(h, c, ioaccel_handle,
5031                                                 cdb, cdb_len, scsi3addr,
5032                                                 phys_disk);
5033 }
5034
5035 static void raid_map_helper(struct raid_map_data *map,
5036                 int offload_to_mirror, u32 *map_index, u32 *current_group)
5037 {
5038         if (offload_to_mirror == 0)  {
5039                 /* use physical disk in the first mirrored group. */
5040                 *map_index %= le16_to_cpu(map->data_disks_per_row);
5041                 return;
5042         }
5043         do {
5044                 /* determine mirror group that *map_index indicates */
5045                 *current_group = *map_index /
5046                         le16_to_cpu(map->data_disks_per_row);
5047                 if (offload_to_mirror == *current_group)
5048                         continue;
5049                 if (*current_group < le16_to_cpu(map->layout_map_count) - 1) {
5050                         /* select map index from next group */
5051                         *map_index += le16_to_cpu(map->data_disks_per_row);
5052                         (*current_group)++;
5053                 } else {
5054                         /* select map index from first group */
5055                         *map_index %= le16_to_cpu(map->data_disks_per_row);
5056                         *current_group = 0;
5057                 }
5058         } while (offload_to_mirror != *current_group);
5059 }
5060
5061 /*
5062  * Attempt to perform offload RAID mapping for a logical volume I/O.
5063  */
5064 static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
5065         struct CommandList *c)
5066 {
5067         struct scsi_cmnd *cmd = c->scsi_cmd;
5068         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
5069         struct raid_map_data *map = &dev->raid_map;
5070         struct raid_map_disk_data *dd = &map->data[0];
5071         int is_write = 0;
5072         u32 map_index;
5073         u64 first_block, last_block;
5074         u32 block_cnt;
5075         u32 blocks_per_row;
5076         u64 first_row, last_row;
5077         u32 first_row_offset, last_row_offset;
5078         u32 first_column, last_column;
5079         u64 r0_first_row, r0_last_row;
5080         u32 r5or6_blocks_per_row;
5081         u64 r5or6_first_row, r5or6_last_row;
5082         u32 r5or6_first_row_offset, r5or6_last_row_offset;
5083         u32 r5or6_first_column, r5or6_last_column;
5084         u32 total_disks_per_row;
5085         u32 stripesize;
5086         u32 first_group, last_group, current_group;
5087         u32 map_row;
5088         u32 disk_handle;
5089         u64 disk_block;
5090         u32 disk_block_cnt;
5091         u8 cdb[16];
5092         u8 cdb_len;
5093         u16 strip_size;
5094 #if BITS_PER_LONG == 32
5095         u64 tmpdiv;
5096 #endif
5097         int offload_to_mirror;
5098
5099         if (!dev)
5100                 return -1;
5101
5102         if (dev->in_reset)
5103                 return -1;
5104
5105         /* check for valid opcode, get LBA and block count */
5106         switch (cmd->cmnd[0]) {
5107         case WRITE_6:
5108                 is_write = 1;
5109                 /* fall through */
5110         case READ_6:
5111                 first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
5112                                 (cmd->cmnd[2] << 8) |
5113                                 cmd->cmnd[3]);
5114                 block_cnt = cmd->cmnd[4];
5115                 if (block_cnt == 0)
5116                         block_cnt = 256;
5117                 break;
5118         case WRITE_10:
5119                 is_write = 1;
5120                 /* fall through */
5121         case READ_10:
5122                 first_block =
5123                         (((u64) cmd->cmnd[2]) << 24) |
5124                         (((u64) cmd->cmnd[3]) << 16) |
5125                         (((u64) cmd->cmnd[4]) << 8) |
5126                         cmd->cmnd[5];
5127                 block_cnt =
5128                         (((u32) cmd->cmnd[7]) << 8) |
5129                         cmd->cmnd[8];
5130                 break;
5131         case WRITE_12:
5132                 is_write = 1;
5133                 /* fall through */
5134         case READ_12:
5135                 first_block =
5136                         (((u64) cmd->cmnd[2]) << 24) |
5137                         (((u64) cmd->cmnd[3]) << 16) |
5138                         (((u64) cmd->cmnd[4]) << 8) |
5139                         cmd->cmnd[5];
5140                 block_cnt =
5141                         (((u32) cmd->cmnd[6]) << 24) |
5142                         (((u32) cmd->cmnd[7]) << 16) |
5143                         (((u32) cmd->cmnd[8]) << 8) |
5144                 cmd->cmnd[9];
5145                 break;
5146         case WRITE_16:
5147                 is_write = 1;
5148                 /* fall through */
5149         case READ_16:
5150                 first_block =
5151                         (((u64) cmd->cmnd[2]) << 56) |
5152                         (((u64) cmd->cmnd[3]) << 48) |
5153                         (((u64) cmd->cmnd[4]) << 40) |
5154                         (((u64) cmd->cmnd[5]) << 32) |
5155                         (((u64) cmd->cmnd[6]) << 24) |
5156                         (((u64) cmd->cmnd[7]) << 16) |
5157                         (((u64) cmd->cmnd[8]) << 8) |
5158                         cmd->cmnd[9];
5159                 block_cnt =
5160                         (((u32) cmd->cmnd[10]) << 24) |
5161                         (((u32) cmd->cmnd[11]) << 16) |
5162                         (((u32) cmd->cmnd[12]) << 8) |
5163                         cmd->cmnd[13];
5164                 break;
5165         default:
5166                 return IO_ACCEL_INELIGIBLE; /* process via normal I/O path */
5167         }
5168         last_block = first_block + block_cnt - 1;
5169
5170         /* check for write to non-RAID-0 */
5171         if (is_write && dev->raid_level != 0)
5172                 return IO_ACCEL_INELIGIBLE;
5173
5174         /* check for invalid block or wraparound */
5175         if (last_block >= le64_to_cpu(map->volume_blk_cnt) ||
5176                 last_block < first_block)
5177                 return IO_ACCEL_INELIGIBLE;
5178
5179         /* calculate stripe information for the request */
5180         blocks_per_row = le16_to_cpu(map->data_disks_per_row) *
5181                                 le16_to_cpu(map->strip_size);
5182         strip_size = le16_to_cpu(map->strip_size);
5183 #if BITS_PER_LONG == 32
5184         tmpdiv = first_block;
5185         (void) do_div(tmpdiv, blocks_per_row);
5186         first_row = tmpdiv;
5187         tmpdiv = last_block;
5188         (void) do_div(tmpdiv, blocks_per_row);
5189         last_row = tmpdiv;
5190         first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
5191         last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
5192         tmpdiv = first_row_offset;
5193         (void) do_div(tmpdiv, strip_size);
5194         first_column = tmpdiv;
5195         tmpdiv = last_row_offset;
5196         (void) do_div(tmpdiv, strip_size);
5197         last_column = tmpdiv;
5198 #else
5199         first_row = first_block / blocks_per_row;
5200         last_row = last_block / blocks_per_row;
5201         first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
5202         last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
5203         first_column = first_row_offset / strip_size;
5204         last_column = last_row_offset / strip_size;
5205 #endif
5206
5207         /* if this isn't a single row/column then give to the controller */
5208         if ((first_row != last_row) || (first_column != last_column))
5209                 return IO_ACCEL_INELIGIBLE;
5210
5211         /* proceeding with driver mapping */
5212         total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
5213                                 le16_to_cpu(map->metadata_disks_per_row);
5214         map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
5215                                 le16_to_cpu(map->row_cnt);
5216         map_index = (map_row * total_disks_per_row) + first_column;
5217
5218         switch (dev->raid_level) {
5219         case HPSA_RAID_0:
5220                 break; /* nothing special to do */
5221         case HPSA_RAID_1:
5222                 /* Handles load balance across RAID 1 members.
5223                  * (2-drive R1 and R10 with even # of drives.)
5224                  * Appropriate for SSDs, not optimal for HDDs
5225                  */
5226                 BUG_ON(le16_to_cpu(map->layout_map_count) != 2);
5227                 if (dev->offload_to_mirror)
5228                         map_index += le16_to_cpu(map->data_disks_per_row);
5229                 dev->offload_to_mirror = !dev->offload_to_mirror;
5230                 break;
5231         case HPSA_RAID_ADM:
5232                 /* Handles N-way mirrors  (R1-ADM)
5233                  * and R10 with # of drives divisible by 3.)
5234                  */
5235                 BUG_ON(le16_to_cpu(map->layout_map_count) != 3);
5236
5237                 offload_to_mirror = dev->offload_to_mirror;
5238                 raid_map_helper(map, offload_to_mirror,
5239                                 &map_index, &current_group);
5240                 /* set mirror group to use next time */
5241                 offload_to_mirror =
5242                         (offload_to_mirror >=
5243                         le16_to_cpu(map->layout_map_count) - 1)
5244                         ? 0 : offload_to_mirror + 1;
5245                 dev->offload_to_mirror = offload_to_mirror;
5246                 /* Avoid direct use of dev->offload_to_mirror within this
5247                  * function since multiple threads might simultaneously
5248                  * increment it beyond the range of dev->layout_map_count -1.
5249                  */
5250                 break;
5251         case HPSA_RAID_5:
5252         case HPSA_RAID_6:
5253                 if (le16_to_cpu(map->layout_map_count) <= 1)
5254                         break;
5255
5256                 /* Verify first and last block are in same RAID group */
5257                 r5or6_blocks_per_row =
5258                         le16_to_cpu(map->strip_size) *
5259                         le16_to_cpu(map->data_disks_per_row);
5260                 BUG_ON(r5or6_blocks_per_row == 0);
5261                 stripesize = r5or6_blocks_per_row *
5262                         le16_to_cpu(map->layout_map_count);
5263 #if BITS_PER_LONG == 32
5264                 tmpdiv = first_block;
5265                 first_group = do_div(tmpdiv, stripesize);
5266                 tmpdiv = first_group;
5267                 (void) do_div(tmpdiv, r5or6_blocks_per_row);
5268                 first_group = tmpdiv;
5269                 tmpdiv = last_block;
5270                 last_group = do_div(tmpdiv, stripesize);
5271                 tmpdiv = last_group;
5272                 (void) do_div(tmpdiv, r5or6_blocks_per_row);
5273                 last_group = tmpdiv;
5274 #else
5275                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
5276                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
5277 #endif
5278                 if (first_group != last_group)
5279                         return IO_ACCEL_INELIGIBLE;
5280
5281                 /* Verify request is in a single row of RAID 5/6 */
5282 #if BITS_PER_LONG == 32
5283                 tmpdiv = first_block;
5284                 (void) do_div(tmpdiv, stripesize);
5285                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
5286                 tmpdiv = last_block;
5287                 (void) do_div(tmpdiv, stripesize);
5288                 r5or6_last_row = r0_last_row = tmpdiv;
5289 #else
5290                 first_row = r5or6_first_row = r0_first_row =
5291                                                 first_block / stripesize;
5292                 r5or6_last_row = r0_last_row = last_block / stripesize;
5293 #endif
5294                 if (r5or6_first_row != r5or6_last_row)
5295                         return IO_ACCEL_INELIGIBLE;
5296
5297
5298                 /* Verify request is in a single column */
5299 #if BITS_PER_LONG == 32
5300                 tmpdiv = first_block;
5301                 first_row_offset = do_div(tmpdiv, stripesize);
5302                 tmpdiv = first_row_offset;
5303                 first_row_offset = (u32) do_div(tmpdiv, r5or6_blocks_per_row);
5304                 r5or6_first_row_offset = first_row_offset;
5305                 tmpdiv = last_block;
5306                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
5307                 tmpdiv = r5or6_last_row_offset;
5308                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
5309                 tmpdiv = r5or6_first_row_offset;
5310                 (void) do_div(tmpdiv, map->strip_size);
5311                 first_column = r5or6_first_column = tmpdiv;
5312                 tmpdiv = r5or6_last_row_offset;
5313                 (void) do_div(tmpdiv, map->strip_size);
5314                 r5or6_last_column = tmpdiv;
5315 #else
5316                 first_row_offset = r5or6_first_row_offset =
5317                         (u32)((first_block % stripesize) %
5318                                                 r5or6_blocks_per_row);
5319
5320                 r5or6_last_row_offset =
5321                         (u32)((last_block % stripesize) %
5322                                                 r5or6_blocks_per_row);
5323
5324                 first_column = r5or6_first_column =
5325                         r5or6_first_row_offset / le16_to_cpu(map->strip_size);
5326                 r5or6_last_column =
5327                         r5or6_last_row_offset / le16_to_cpu(map->strip_size);
5328 #endif
5329                 if (r5or6_first_column != r5or6_last_column)
5330                         return IO_ACCEL_INELIGIBLE;
5331
5332                 /* Request is eligible */
5333                 map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
5334                         le16_to_cpu(map->row_cnt);
5335
5336                 map_index = (first_group *
5337                         (le16_to_cpu(map->row_cnt) * total_disks_per_row)) +
5338                         (map_row * total_disks_per_row) + first_column;
5339                 break;
5340         default:
5341                 return IO_ACCEL_INELIGIBLE;
5342         }
5343
5344         if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
5345                 return IO_ACCEL_INELIGIBLE;
5346
5347         c->phys_disk = dev->phys_disk[map_index];
5348         if (!c->phys_disk)
5349                 return IO_ACCEL_INELIGIBLE;
5350
5351         disk_handle = dd[map_index].ioaccel_handle;
5352         disk_block = le64_to_cpu(map->disk_starting_blk) +
5353                         first_row * le16_to_cpu(map->strip_size) +
5354                         (first_row_offset - first_column *
5355                         le16_to_cpu(map->strip_size));
5356         disk_block_cnt = block_cnt;
5357
5358         /* handle differing logical/physical block sizes */
5359         if (map->phys_blk_shift) {
5360                 disk_block <<= map->phys_blk_shift;
5361                 disk_block_cnt <<= map->phys_blk_shift;
5362         }
5363         BUG_ON(disk_block_cnt > 0xffff);
5364
5365         /* build the new CDB for the physical disk I/O */
5366         if (disk_block > 0xffffffff) {
5367                 cdb[0] = is_write ? WRITE_16 : READ_16;
5368                 cdb[1] = 0;
5369                 cdb[2] = (u8) (disk_block >> 56);
5370                 cdb[3] = (u8) (disk_block >> 48);
5371                 cdb[4] = (u8) (disk_block >> 40);
5372                 cdb[5] = (u8) (disk_block >> 32);
5373                 cdb[6] = (u8) (disk_block >> 24);
5374                 cdb[7] = (u8) (disk_block >> 16);
5375                 cdb[8] = (u8) (disk_block >> 8);
5376                 cdb[9] = (u8) (disk_block);
5377                 cdb[10] = (u8) (disk_block_cnt >> 24);
5378                 cdb[11] = (u8) (disk_block_cnt >> 16);
5379                 cdb[12] = (u8) (disk_block_cnt >> 8);
5380                 cdb[13] = (u8) (disk_block_cnt);
5381                 cdb[14] = 0;
5382                 cdb[15] = 0;
5383                 cdb_len = 16;
5384         } else {
5385                 cdb[0] = is_write ? WRITE_10 : READ_10;
5386                 cdb[1] = 0;
5387                 cdb[2] = (u8) (disk_block >> 24);
5388                 cdb[3] = (u8) (disk_block >> 16);
5389                 cdb[4] = (u8) (disk_block >> 8);
5390                 cdb[5] = (u8) (disk_block);
5391                 cdb[6] = 0;
5392                 cdb[7] = (u8) (disk_block_cnt >> 8);
5393                 cdb[8] = (u8) (disk_block_cnt);
5394                 cdb[9] = 0;
5395                 cdb_len = 10;
5396         }
5397         return hpsa_scsi_ioaccel_queue_command(h, c, disk_handle, cdb, cdb_len,
5398                                                 dev->scsi3addr,
5399                                                 dev->phys_disk[map_index]);
5400 }
5401
5402 /*
5403  * Submit commands down the "normal" RAID stack path
5404  * All callers to hpsa_ciss_submit must check lockup_detected
5405  * beforehand, before (opt.) and after calling cmd_alloc
5406  */
5407 static int hpsa_ciss_submit(struct ctlr_info *h,
5408         struct CommandList *c, struct scsi_cmnd *cmd,
5409         struct hpsa_scsi_dev_t *dev)
5410 {
5411         cmd->host_scribble = (unsigned char *) c;
5412         c->cmd_type = CMD_SCSI;
5413         c->scsi_cmd = cmd;
5414         c->Header.ReplyQueue = 0;  /* unused in simple mode */
5415         memcpy(&c->Header.LUN.LunAddrBytes[0], &dev->scsi3addr[0], 8);
5416         c->Header.tag = cpu_to_le64((c->cmdindex << DIRECT_LOOKUP_SHIFT));
5417
5418         /* Fill in the request block... */
5419
5420         c->Request.Timeout = 0;
5421         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
5422         c->Request.CDBLen = cmd->cmd_len;
5423         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
5424         switch (cmd->sc_data_direction) {
5425         case DMA_TO_DEVICE:
5426                 c->Request.type_attr_dir =
5427                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_WRITE);
5428                 break;
5429         case DMA_FROM_DEVICE:
5430                 c->Request.type_attr_dir =
5431                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_READ);
5432                 break;
5433         case DMA_NONE:
5434                 c->Request.type_attr_dir =
5435                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_NONE);
5436                 break;
5437         case DMA_BIDIRECTIONAL:
5438                 /* This can happen if a buggy application does a scsi passthru
5439                  * and sets both inlen and outlen to non-zero. ( see
5440                  * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
5441                  */
5442
5443                 c->Request.type_attr_dir =
5444                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_RSVD);
5445                 /* This is technically wrong, and hpsa controllers should
5446                  * reject it with CMD_INVALID, which is the most correct
5447                  * response, but non-fibre backends appear to let it
5448                  * slide by, and give the same results as if this field
5449                  * were set correctly.  Either way is acceptable for
5450                  * our purposes here.
5451                  */
5452
5453                 break;
5454
5455         default:
5456                 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
5457                         cmd->sc_data_direction);
5458                 BUG();
5459                 break;
5460         }
5461
5462         if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
5463                 hpsa_cmd_resolve_and_free(h, c);
5464                 return SCSI_MLQUEUE_HOST_BUSY;
5465         }
5466
5467         if (dev->in_reset) {
5468                 hpsa_cmd_resolve_and_free(h, c);
5469                 return SCSI_MLQUEUE_HOST_BUSY;
5470         }
5471
5472         enqueue_cmd_and_start_io(h, c);
5473         /* the cmd'll come back via intr handler in complete_scsi_command()  */
5474         return 0;
5475 }
5476
5477 static void hpsa_cmd_init(struct ctlr_info *h, int index,
5478                                 struct CommandList *c)
5479 {
5480         dma_addr_t cmd_dma_handle, err_dma_handle;
5481
5482         /* Zero out all of commandlist except the last field, refcount */
5483         memset(c, 0, offsetof(struct CommandList, refcount));
5484         c->Header.tag = cpu_to_le64((u64) (index << DIRECT_LOOKUP_SHIFT));
5485         cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);
5486         c->err_info = h->errinfo_pool + index;
5487         memset(c->err_info, 0, sizeof(*c->err_info));
5488         err_dma_handle = h->errinfo_pool_dhandle
5489             + index * sizeof(*c->err_info);
5490         c->cmdindex = index;
5491         c->busaddr = (u32) cmd_dma_handle;
5492         c->ErrDesc.Addr = cpu_to_le64((u64) err_dma_handle);
5493         c->ErrDesc.Len = cpu_to_le32((u32) sizeof(*c->err_info));
5494         c->h = h;
5495         c->scsi_cmd = SCSI_CMD_IDLE;
5496 }
5497
5498 static void hpsa_preinitialize_commands(struct ctlr_info *h)
5499 {
5500         int i;
5501
5502         for (i = 0; i < h->nr_cmds; i++) {
5503                 struct CommandList *c = h->cmd_pool + i;
5504
5505                 hpsa_cmd_init(h, i, c);
5506                 atomic_set(&c->refcount, 0);
5507         }
5508 }
5509
5510 static inline void hpsa_cmd_partial_init(struct ctlr_info *h, int index,
5511                                 struct CommandList *c)
5512 {
5513         dma_addr_t cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);
5514
5515         BUG_ON(c->cmdindex != index);
5516
5517         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
5518         memset(c->err_info, 0, sizeof(*c->err_info));
5519         c->busaddr = (u32) cmd_dma_handle;
5520 }
5521
5522 static int hpsa_ioaccel_submit(struct ctlr_info *h,
5523                 struct CommandList *c, struct scsi_cmnd *cmd)
5524 {
5525         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
5526         int rc = IO_ACCEL_INELIGIBLE;
5527
5528         if (!dev)
5529                 return SCSI_MLQUEUE_HOST_BUSY;
5530
5531         if (dev->in_reset)
5532                 return SCSI_MLQUEUE_HOST_BUSY;
5533
5534         if (hpsa_simple_mode)
5535                 return IO_ACCEL_INELIGIBLE;
5536
5537         cmd->host_scribble = (unsigned char *) c;
5538
5539         if (dev->offload_enabled) {
5540                 hpsa_cmd_init(h, c->cmdindex, c);
5541                 c->cmd_type = CMD_SCSI;
5542                 c->scsi_cmd = cmd;
5543                 rc = hpsa_scsi_ioaccel_raid_map(h, c);
5544                 if (rc < 0)     /* scsi_dma_map failed. */
5545                         rc = SCSI_MLQUEUE_HOST_BUSY;
5546         } else if (dev->hba_ioaccel_enabled) {
5547                 hpsa_cmd_init(h, c->cmdindex, c);
5548                 c->cmd_type = CMD_SCSI;
5549                 c->scsi_cmd = cmd;
5550                 rc = hpsa_scsi_ioaccel_direct_map(h, c);
5551                 if (rc < 0)     /* scsi_dma_map failed. */
5552                         rc = SCSI_MLQUEUE_HOST_BUSY;
5553         }
5554         return rc;
5555 }
5556
5557 static void hpsa_command_resubmit_worker(struct work_struct *work)
5558 {
5559         struct scsi_cmnd *cmd;
5560         struct hpsa_scsi_dev_t *dev;
5561         struct CommandList *c = container_of(work, struct CommandList, work);
5562
5563         cmd = c->scsi_cmd;
5564         dev = cmd->device->hostdata;
5565         if (!dev) {
5566                 cmd->result = DID_NO_CONNECT << 16;
5567                 return hpsa_cmd_free_and_done(c->h, c, cmd);
5568         }
5569
5570         if (dev->in_reset) {
5571                 cmd->result = DID_RESET << 16;
5572                 return hpsa_cmd_free_and_done(c->h, c, cmd);
5573         }
5574
5575         if (c->cmd_type == CMD_IOACCEL2) {
5576                 struct ctlr_info *h = c->h;
5577                 struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
5578                 int rc;
5579
5580                 if (c2->error_data.serv_response ==
5581                                 IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL) {
5582                         rc = hpsa_ioaccel_submit(h, c, cmd);
5583                         if (rc == 0)
5584                                 return;
5585                         if (rc == SCSI_MLQUEUE_HOST_BUSY) {
5586                                 /*
5587                                  * If we get here, it means dma mapping failed.
5588                                  * Try again via scsi mid layer, which will
5589                                  * then get SCSI_MLQUEUE_HOST_BUSY.
5590                                  */
5591                                 cmd->result = DID_IMM_RETRY << 16;
5592                                 return hpsa_cmd_free_and_done(h, c, cmd);
5593                         }
5594                         /* else, fall thru and resubmit down CISS path */
5595                 }
5596         }
5597         hpsa_cmd_partial_init(c->h, c->cmdindex, c);
5598         if (hpsa_ciss_submit(c->h, c, cmd, dev)) {
5599                 /*
5600                  * If we get here, it means dma mapping failed. Try
5601                  * again via scsi mid layer, which will then get
5602                  * SCSI_MLQUEUE_HOST_BUSY.
5603                  *
5604                  * hpsa_ciss_submit will have already freed c
5605                  * if it encountered a dma mapping failure.
5606                  */
5607                 cmd->result = DID_IMM_RETRY << 16;
5608                 cmd->scsi_done(cmd);
5609         }
5610 }
5611
5612 /* Running in struct Scsi_Host->host_lock less mode */
5613 static int hpsa_scsi_queue_command(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
5614 {
5615         struct ctlr_info *h;
5616         struct hpsa_scsi_dev_t *dev;
5617         struct CommandList *c;
5618         int rc = 0;
5619
5620         /* Get the ptr to our adapter structure out of cmd->host. */
5621         h = sdev_to_hba(cmd->device);
5622
5623         BUG_ON(cmd->request->tag < 0);
5624
5625         dev = cmd->device->hostdata;
5626         if (!dev) {
5627                 cmd->result = DID_NO_CONNECT << 16;
5628                 cmd->scsi_done(cmd);
5629                 return 0;
5630         }
5631
5632         if (dev->removed) {
5633                 cmd->result = DID_NO_CONNECT << 16;
5634                 cmd->scsi_done(cmd);
5635                 return 0;
5636         }
5637
5638         if (unlikely(lockup_detected(h))) {
5639                 cmd->result = DID_NO_CONNECT << 16;
5640                 cmd->scsi_done(cmd);
5641                 return 0;
5642         }
5643
5644         if (dev->in_reset)
5645                 return SCSI_MLQUEUE_DEVICE_BUSY;
5646
5647         c = cmd_tagged_alloc(h, cmd);
5648         if (c == NULL)
5649                 return SCSI_MLQUEUE_DEVICE_BUSY;
5650
5651         /*
5652          * Call alternate submit routine for I/O accelerated commands.
5653          * Retries always go down the normal I/O path.
5654          */
5655         if (likely(cmd->retries == 0 &&
5656                         !blk_rq_is_passthrough(cmd->request) &&
5657                         h->acciopath_status)) {
5658                 rc = hpsa_ioaccel_submit(h, c, cmd);
5659                 if (rc == 0)
5660                         return 0;
5661                 if (rc == SCSI_MLQUEUE_HOST_BUSY) {
5662                         hpsa_cmd_resolve_and_free(h, c);
5663                         return SCSI_MLQUEUE_HOST_BUSY;
5664                 }
5665         }
5666         return hpsa_ciss_submit(h, c, cmd, dev);
5667 }
5668
5669 static void hpsa_scan_complete(struct ctlr_info *h)
5670 {
5671         unsigned long flags;
5672
5673         spin_lock_irqsave(&h->scan_lock, flags);
5674         h->scan_finished = 1;
5675         wake_up(&h->scan_wait_queue);
5676         spin_unlock_irqrestore(&h->scan_lock, flags);
5677 }
5678
5679 static void hpsa_scan_start(struct Scsi_Host *sh)
5680 {
5681         struct ctlr_info *h = shost_to_hba(sh);
5682         unsigned long flags;
5683
5684         /*
5685          * Don't let rescans be initiated on a controller known to be locked
5686          * up.  If the controller locks up *during* a rescan, that thread is
5687          * probably hosed, but at least we can prevent new rescan threads from
5688          * piling up on a locked up controller.
5689          */
5690         if (unlikely(lockup_detected(h)))
5691                 return hpsa_scan_complete(h);
5692
5693         /*
5694          * If a scan is already waiting to run, no need to add another
5695          */
5696         spin_lock_irqsave(&h->scan_lock, flags);
5697         if (h->scan_waiting) {
5698                 spin_unlock_irqrestore(&h->scan_lock, flags);
5699                 return;
5700         }
5701
5702         spin_unlock_irqrestore(&h->scan_lock, flags);
5703
5704         /* wait until any scan already in progress is finished. */
5705         while (1) {
5706                 spin_lock_irqsave(&h->scan_lock, flags);
5707                 if (h->scan_finished)
5708                         break;
5709                 h->scan_waiting = 1;
5710                 spin_unlock_irqrestore(&h->scan_lock, flags);
5711                 wait_event(h->scan_wait_queue, h->scan_finished);
5712                 /* Note: We don't need to worry about a race between this
5713                  * thread and driver unload because the midlayer will
5714                  * have incremented the reference count, so unload won't
5715                  * happen if we're in here.
5716                  */
5717         }
5718         h->scan_finished = 0; /* mark scan as in progress */
5719         h->scan_waiting = 0;
5720         spin_unlock_irqrestore(&h->scan_lock, flags);
5721
5722         if (unlikely(lockup_detected(h)))
5723                 return hpsa_scan_complete(h);
5724
5725         /*
5726          * Do the scan after a reset completion
5727          */
5728         spin_lock_irqsave(&h->reset_lock, flags);
5729         if (h->reset_in_progress) {
5730                 h->drv_req_rescan = 1;
5731                 spin_unlock_irqrestore(&h->reset_lock, flags);
5732                 hpsa_scan_complete(h);
5733                 return;
5734         }
5735         spin_unlock_irqrestore(&h->reset_lock, flags);
5736
5737         hpsa_update_scsi_devices(h);
5738
5739         hpsa_scan_complete(h);
5740 }
5741
5742 static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth)
5743 {
5744         struct hpsa_scsi_dev_t *logical_drive = sdev->hostdata;
5745
5746         if (!logical_drive)
5747                 return -ENODEV;
5748
5749         if (qdepth < 1)
5750                 qdepth = 1;
5751         else if (qdepth > logical_drive->queue_depth)
5752                 qdepth = logical_drive->queue_depth;
5753
5754         return scsi_change_queue_depth(sdev, qdepth);
5755 }
5756
5757 static int hpsa_scan_finished(struct Scsi_Host *sh,
5758         unsigned long elapsed_time)
5759 {
5760         struct ctlr_info *h = shost_to_hba(sh);
5761         unsigned long flags;
5762         int finished;
5763
5764         spin_lock_irqsave(&h->scan_lock, flags);
5765         finished = h->scan_finished;
5766         spin_unlock_irqrestore(&h->scan_lock, flags);
5767         return finished;
5768 }
5769
5770 static int hpsa_scsi_host_alloc(struct ctlr_info *h)
5771 {
5772         struct Scsi_Host *sh;
5773
5774         sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
5775         if (sh == NULL) {
5776                 dev_err(&h->pdev->dev, "scsi_host_alloc failed\n");
5777                 return -ENOMEM;
5778         }
5779
5780         sh->io_port = 0;
5781         sh->n_io_port = 0;
5782         sh->this_id = -1;
5783         sh->max_channel = 3;
5784         sh->max_cmd_len = MAX_COMMAND_SIZE;
5785         sh->max_lun = HPSA_MAX_LUN;
5786         sh->max_id = HPSA_MAX_LUN;
5787         sh->can_queue = h->nr_cmds - HPSA_NRESERVED_CMDS;
5788         sh->cmd_per_lun = sh->can_queue;
5789         sh->sg_tablesize = h->maxsgentries;
5790         sh->transportt = hpsa_sas_transport_template;
5791         sh->hostdata[0] = (unsigned long) h;
5792         sh->irq = pci_irq_vector(h->pdev, 0);
5793         sh->unique_id = sh->irq;
5794
5795         h->scsi_host = sh;
5796         return 0;
5797 }
5798
5799 static int hpsa_scsi_add_host(struct ctlr_info *h)
5800 {
5801         int rv;
5802
5803         rv = scsi_add_host(h->scsi_host, &h->pdev->dev);
5804         if (rv) {
5805                 dev_err(&h->pdev->dev, "scsi_add_host failed\n");
5806                 return rv;
5807         }
5808         scsi_scan_host(h->scsi_host);
5809         return 0;
5810 }
5811
5812 /*
5813  * The block layer has already gone to the trouble of picking out a unique,
5814  * small-integer tag for this request.  We use an offset from that value as
5815  * an index to select our command block.  (The offset allows us to reserve the
5816  * low-numbered entries for our own uses.)
5817  */
5818 static int hpsa_get_cmd_index(struct scsi_cmnd *scmd)
5819 {
5820         int idx = scmd->request->tag;
5821
5822         if (idx < 0)
5823                 return idx;
5824
5825         /* Offset to leave space for internal cmds. */
5826         return idx += HPSA_NRESERVED_CMDS;
5827 }
5828
5829 /*
5830  * Send a TEST_UNIT_READY command to the specified LUN using the specified
5831  * reply queue; returns zero if the unit is ready, and non-zero otherwise.
5832  */
5833 static int hpsa_send_test_unit_ready(struct ctlr_info *h,
5834                                 struct CommandList *c, unsigned char lunaddr[],
5835                                 int reply_queue)
5836 {
5837         int rc;
5838
5839         /* Send the Test Unit Ready, fill_cmd can't fail, no mapping */
5840         (void) fill_cmd(c, TEST_UNIT_READY, h,
5841                         NULL, 0, 0, lunaddr, TYPE_CMD);
5842         rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
5843         if (rc)
5844                 return rc;
5845         /* no unmap needed here because no data xfer. */
5846
5847         /* Check if the unit is already ready. */
5848         if (c->err_info->CommandStatus == CMD_SUCCESS)
5849                 return 0;
5850
5851         /*
5852          * The first command sent after reset will receive "unit attention" to
5853          * indicate that the LUN has been reset...this is actually what we're
5854          * looking for (but, success is good too).
5855          */
5856         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
5857                 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
5858                         (c->err_info->SenseInfo[2] == NO_SENSE ||
5859                          c->err_info->SenseInfo[2] == UNIT_ATTENTION))
5860                 return 0;
5861
5862         return 1;
5863 }
5864
5865 /*
5866  * Wait for a TEST_UNIT_READY command to complete, retrying as necessary;
5867  * returns zero when the unit is ready, and non-zero when giving up.
5868  */
5869 static int hpsa_wait_for_test_unit_ready(struct ctlr_info *h,
5870                                 struct CommandList *c,
5871                                 unsigned char lunaddr[], int reply_queue)
5872 {
5873         int rc;
5874         int count = 0;
5875         int waittime = 1; /* seconds */
5876
5877         /* Send test unit ready until device ready, or give up. */
5878         for (count = 0; count < HPSA_TUR_RETRY_LIMIT; count++) {
5879
5880                 /*
5881                  * Wait for a bit.  do this first, because if we send
5882                  * the TUR right away, the reset will just abort it.
5883                  */
5884                 msleep(1000 * waittime);
5885
5886                 rc = hpsa_send_test_unit_ready(h, c, lunaddr, reply_queue);
5887                 if (!rc)
5888                         break;
5889
5890                 /* Increase wait time with each try, up to a point. */
5891                 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
5892                         waittime *= 2;
5893
5894                 dev_warn(&h->pdev->dev,
5895                          "waiting %d secs for device to become ready.\n",
5896                          waittime);
5897         }
5898
5899         return rc;
5900 }
5901
5902 static int wait_for_device_to_become_ready(struct ctlr_info *h,
5903                                            unsigned char lunaddr[],
5904                                            int reply_queue)
5905 {
5906         int first_queue;
5907         int last_queue;
5908         int rq;
5909         int rc = 0;
5910         struct CommandList *c;
5911
5912         c = cmd_alloc(h);
5913
5914         /*
5915          * If no specific reply queue was requested, then send the TUR
5916          * repeatedly, requesting a reply on each reply queue; otherwise execute
5917          * the loop exactly once using only the specified queue.
5918          */
5919         if (reply_queue == DEFAULT_REPLY_QUEUE) {
5920                 first_queue = 0;
5921                 last_queue = h->nreply_queues - 1;
5922         } else {
5923                 first_queue = reply_queue;
5924                 last_queue = reply_queue;
5925         }
5926
5927         for (rq = first_queue; rq <= last_queue; rq++) {
5928                 rc = hpsa_wait_for_test_unit_ready(h, c, lunaddr, rq);
5929                 if (rc)
5930                         break;
5931         }
5932
5933         if (rc)
5934                 dev_warn(&h->pdev->dev, "giving up on device.\n");
5935         else
5936                 dev_warn(&h->pdev->dev, "device is ready.\n");
5937
5938         cmd_free(h, c);
5939         return rc;
5940 }
5941
5942 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
5943  * complaining.  Doing a host- or bus-reset can't do anything good here.
5944  */
5945 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
5946 {
5947         int rc = SUCCESS;
5948         int i;
5949         struct ctlr_info *h;
5950         struct hpsa_scsi_dev_t *dev = NULL;
5951         u8 reset_type;
5952         char msg[48];
5953         unsigned long flags;
5954
5955         /* find the controller to which the command to be aborted was sent */
5956         h = sdev_to_hba(scsicmd->device);
5957         if (h == NULL) /* paranoia */
5958                 return FAILED;
5959
5960         spin_lock_irqsave(&h->reset_lock, flags);
5961         h->reset_in_progress = 1;
5962         spin_unlock_irqrestore(&h->reset_lock, flags);
5963
5964         if (lockup_detected(h)) {
5965                 rc = FAILED;
5966                 goto return_reset_status;
5967         }
5968
5969         dev = scsicmd->device->hostdata;
5970         if (!dev) {
5971                 dev_err(&h->pdev->dev, "%s: device lookup failed\n", __func__);
5972                 rc = FAILED;
5973                 goto return_reset_status;
5974         }
5975
5976         if (dev->devtype == TYPE_ENCLOSURE) {
5977                 rc = SUCCESS;
5978                 goto return_reset_status;
5979         }
5980
5981         /* if controller locked up, we can guarantee command won't complete */
5982         if (lockup_detected(h)) {
5983                 snprintf(msg, sizeof(msg),
5984                          "cmd %d RESET FAILED, lockup detected",
5985                          hpsa_get_cmd_index(scsicmd));
5986                 hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5987                 rc = FAILED;
5988                 goto return_reset_status;
5989         }
5990
5991         /* this reset request might be the result of a lockup; check */
5992         if (detect_controller_lockup(h)) {
5993                 snprintf(msg, sizeof(msg),
5994                          "cmd %d RESET FAILED, new lockup detected",
5995                          hpsa_get_cmd_index(scsicmd));
5996                 hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5997                 rc = FAILED;
5998                 goto return_reset_status;
5999         }
6000
6001         /* Do not attempt on controller */
6002         if (is_hba_lunid(dev->scsi3addr)) {
6003                 rc = SUCCESS;
6004                 goto return_reset_status;
6005         }
6006
6007         if (is_logical_dev_addr_mode(dev->scsi3addr))
6008                 reset_type = HPSA_DEVICE_RESET_MSG;
6009         else
6010                 reset_type = HPSA_PHYS_TARGET_RESET;
6011
6012         sprintf(msg, "resetting %s",
6013                 reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ");
6014         hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
6015
6016         /*
6017          * wait to see if any commands will complete before sending reset
6018          */
6019         dev->in_reset = true; /* block any new cmds from OS for this device */
6020         for (i = 0; i < 10; i++) {
6021                 if (atomic_read(&dev->commands_outstanding) > 0)
6022                         msleep(1000);
6023                 else
6024                         break;
6025         }
6026
6027         /* send a reset to the SCSI LUN which the command was sent to */
6028         rc = hpsa_do_reset(h, dev, reset_type, DEFAULT_REPLY_QUEUE);
6029         if (rc == 0)
6030                 rc = SUCCESS;
6031         else
6032                 rc = FAILED;
6033
6034         sprintf(msg, "reset %s %s",
6035                 reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ",
6036                 rc == SUCCESS ? "completed successfully" : "failed");
6037         hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
6038
6039 return_reset_status:
6040         spin_lock_irqsave(&h->reset_lock, flags);
6041         h->reset_in_progress = 0;
6042         if (dev)
6043                 dev->in_reset = false;
6044         spin_unlock_irqrestore(&h->reset_lock, flags);
6045         return rc;
6046 }
6047
6048 /*
6049  * For operations with an associated SCSI command, a command block is allocated
6050  * at init, and managed by cmd_tagged_alloc() and cmd_tagged_free() using the
6051  * block request tag as an index into a table of entries.  cmd_tagged_free() is
6052  * the complement, although cmd_free() may be called instead.
6053  */
6054 static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
6055                                             struct scsi_cmnd *scmd)
6056 {
6057         int idx = hpsa_get_cmd_index(scmd);
6058         struct CommandList *c = h->cmd_pool + idx;
6059
6060         if (idx < HPSA_NRESERVED_CMDS || idx >= h->nr_cmds) {
6061                 dev_err(&h->pdev->dev, "Bad block tag: %d not in [%d..%d]\n",
6062                         idx, HPSA_NRESERVED_CMDS, h->nr_cmds - 1);
6063                 /* The index value comes from the block layer, so if it's out of
6064                  * bounds, it's probably not our bug.
6065                  */
6066                 BUG();
6067         }
6068
6069         if (unlikely(!hpsa_is_cmd_idle(c))) {
6070                 /*
6071                  * We expect that the SCSI layer will hand us a unique tag
6072                  * value.  Thus, there should never be a collision here between
6073                  * two requests...because if the selected command isn't idle
6074                  * then someone is going to be very disappointed.
6075                  */
6076                 if (idx != h->last_collision_tag) { /* Print once per tag */
6077                         dev_warn(&h->pdev->dev,
6078                                 "%s: tag collision (tag=%d)\n", __func__, idx);
6079                         if (c->scsi_cmd != NULL)
6080                                 scsi_print_command(c->scsi_cmd);
6081                         if (scmd)
6082                                 scsi_print_command(scmd);
6083                         h->last_collision_tag = idx;
6084                 }
6085                 return NULL;
6086         }
6087
6088         atomic_inc(&c->refcount);
6089
6090         hpsa_cmd_partial_init(h, idx, c);
6091         return c;
6092 }
6093
6094 static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c)
6095 {
6096         /*
6097          * Release our reference to the block.  We don't need to do anything
6098          * else to free it, because it is accessed by index.
6099          */
6100         (void)atomic_dec(&c->refcount);
6101 }
6102
6103 /*
6104  * For operations that cannot sleep, a command block is allocated at init,
6105  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
6106  * which ones are free or in use.  Lock must be held when calling this.
6107  * cmd_free() is the complement.
6108  * This function never gives up and returns NULL.  If it hangs,
6109  * another thread must call cmd_free() to free some tags.
6110  */
6111
6112 static struct CommandList *cmd_alloc(struct ctlr_info *h)
6113 {
6114         struct CommandList *c;
6115         int refcount, i;
6116         int offset = 0;
6117
6118         /*
6119          * There is some *extremely* small but non-zero chance that that
6120          * multiple threads could get in here, and one thread could
6121          * be scanning through the list of bits looking for a free
6122          * one, but the free ones are always behind him, and other
6123          * threads sneak in behind him and eat them before he can
6124          * get to them, so that while there is always a free one, a
6125          * very unlucky thread might be starved anyway, never able to
6126          * beat the other threads.  In reality, this happens so
6127          * infrequently as to be indistinguishable from never.
6128          *
6129          * Note that we start allocating commands before the SCSI host structure
6130          * is initialized.  Since the search starts at bit zero, this
6131          * all works, since we have at least one command structure available;
6132          * however, it means that the structures with the low indexes have to be
6133          * reserved for driver-initiated requests, while requests from the block
6134          * layer will use the higher indexes.
6135          */
6136
6137         for (;;) {
6138                 i = find_next_zero_bit(h->cmd_pool_bits,
6139                                         HPSA_NRESERVED_CMDS,
6140                                         offset);
6141                 if (unlikely(i >= HPSA_NRESERVED_CMDS)) {
6142                         offset = 0;
6143                         continue;
6144                 }
6145                 c = h->cmd_pool + i;
6146                 refcount = atomic_inc_return(&c->refcount);
6147                 if (unlikely(refcount > 1)) {
6148                         cmd_free(h, c); /* already in use */
6149                         offset = (i + 1) % HPSA_NRESERVED_CMDS;
6150                         continue;
6151                 }
6152                 set_bit(i & (BITS_PER_LONG - 1),
6153                         h->cmd_pool_bits + (i / BITS_PER_LONG));
6154                 break; /* it's ours now. */
6155         }
6156         hpsa_cmd_partial_init(h, i, c);
6157         c->device = NULL;
6158         return c;
6159 }
6160
6161 /*
6162  * This is the complementary operation to cmd_alloc().  Note, however, in some
6163  * corner cases it may also be used to free blocks allocated by
6164  * cmd_tagged_alloc() in which case the ref-count decrement does the trick and
6165  * the clear-bit is harmless.
6166  */
6167 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
6168 {
6169         if (atomic_dec_and_test(&c->refcount)) {
6170                 int i;
6171
6172                 i = c - h->cmd_pool;
6173                 clear_bit(i & (BITS_PER_LONG - 1),
6174                           h->cmd_pool_bits + (i / BITS_PER_LONG));
6175         }
6176 }
6177
6178 #ifdef CONFIG_COMPAT
6179
6180 static int hpsa_ioctl32_passthru(struct scsi_device *dev, unsigned int cmd,
6181         void __user *arg)
6182 {
6183         IOCTL32_Command_struct __user *arg32 =
6184             (IOCTL32_Command_struct __user *) arg;
6185         IOCTL_Command_struct arg64;
6186         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
6187         int err;
6188         u32 cp;
6189
6190         memset(&arg64, 0, sizeof(arg64));
6191         err = 0;
6192         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
6193                            sizeof(arg64.LUN_info));
6194         err |= copy_from_user(&arg64.Request, &arg32->Request,
6195                            sizeof(arg64.Request));
6196         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
6197                            sizeof(arg64.error_info));
6198         err |= get_user(arg64.buf_size, &arg32->buf_size);
6199         err |= get_user(cp, &arg32->buf);
6200         arg64.buf = compat_ptr(cp);
6201         err |= copy_to_user(p, &arg64, sizeof(arg64));
6202
6203         if (err)
6204                 return -EFAULT;
6205
6206         err = hpsa_ioctl(dev, CCISS_PASSTHRU, p);
6207         if (err)
6208                 return err;
6209         err |= copy_in_user(&arg32->error_info, &p->error_info,
6210                          sizeof(arg32->error_info));
6211         if (err)
6212                 return -EFAULT;
6213         return err;
6214 }
6215
6216 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
6217         unsigned int cmd, void __user *arg)
6218 {
6219         BIG_IOCTL32_Command_struct __user *arg32 =
6220             (BIG_IOCTL32_Command_struct __user *) arg;
6221         BIG_IOCTL_Command_struct arg64;
6222         BIG_IOCTL_Command_struct __user *p =
6223             compat_alloc_user_space(sizeof(arg64));
6224         int err;
6225         u32 cp;
6226
6227         memset(&arg64, 0, sizeof(arg64));
6228         err = 0;
6229         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
6230                            sizeof(arg64.LUN_info));
6231         err |= copy_from_user(&arg64.Request, &arg32->Request,
6232                            sizeof(arg64.Request));
6233         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
6234                            sizeof(arg64.error_info));
6235         err |= get_user(arg64.buf_size, &arg32->buf_size);
6236         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
6237         err |= get_user(cp, &arg32->buf);
6238         arg64.buf = compat_ptr(cp);
6239         err |= copy_to_user(p, &arg64, sizeof(arg64));
6240
6241         if (err)
6242                 return -EFAULT;
6243
6244         err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, p);
6245         if (err)
6246                 return err;
6247         err |= copy_in_user(&arg32->error_info, &p->error_info,
6248                          sizeof(arg32->error_info));
6249         if (err)
6250                 return -EFAULT;
6251         return err;
6252 }
6253
6254 static int hpsa_compat_ioctl(struct scsi_device *dev, unsigned int cmd,
6255                              void __user *arg)
6256 {
6257         switch (cmd) {
6258         case CCISS_GETPCIINFO:
6259         case CCISS_GETINTINFO:
6260         case CCISS_SETINTINFO:
6261         case CCISS_GETNODENAME:
6262         case CCISS_SETNODENAME:
6263         case CCISS_GETHEARTBEAT:
6264         case CCISS_GETBUSTYPES:
6265         case CCISS_GETFIRMVER:
6266         case CCISS_GETDRIVVER:
6267         case CCISS_REVALIDVOLS:
6268         case CCISS_DEREGDISK:
6269         case CCISS_REGNEWDISK:
6270         case CCISS_REGNEWD:
6271         case CCISS_RESCANDISK:
6272         case CCISS_GETLUNINFO:
6273                 return hpsa_ioctl(dev, cmd, arg);
6274
6275         case CCISS_PASSTHRU32:
6276                 return hpsa_ioctl32_passthru(dev, cmd, arg);
6277         case CCISS_BIG_PASSTHRU32:
6278                 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
6279
6280         default:
6281                 return -ENOIOCTLCMD;
6282         }
6283 }
6284 #endif
6285
6286 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
6287 {
6288         struct hpsa_pci_info pciinfo;
6289
6290         if (!argp)
6291                 return -EINVAL;
6292         pciinfo.domain = pci_domain_nr(h->pdev->bus);
6293         pciinfo.bus = h->pdev->bus->number;
6294         pciinfo.dev_fn = h->pdev->devfn;
6295         pciinfo.board_id = h->board_id;
6296         if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
6297                 return -EFAULT;
6298         return 0;
6299 }
6300
6301 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
6302 {
6303         DriverVer_type DriverVer;
6304         unsigned char vmaj, vmin, vsubmin;
6305         int rc;
6306
6307         rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
6308                 &vmaj, &vmin, &vsubmin);
6309         if (rc != 3) {
6310                 dev_info(&h->pdev->dev, "driver version string '%s' "
6311                         "unrecognized.", HPSA_DRIVER_VERSION);
6312                 vmaj = 0;
6313                 vmin = 0;
6314                 vsubmin = 0;
6315         }
6316         DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
6317         if (!argp)
6318                 return -EINVAL;
6319         if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
6320                 return -EFAULT;
6321         return 0;
6322 }
6323
6324 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
6325 {
6326         IOCTL_Command_struct iocommand;
6327         struct CommandList *c;
6328         char *buff = NULL;
6329         u64 temp64;
6330         int rc = 0;
6331
6332         if (!argp)
6333                 return -EINVAL;
6334         if (!capable(CAP_SYS_RAWIO))
6335                 return -EPERM;
6336         if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
6337                 return -EFAULT;
6338         if ((iocommand.buf_size < 1) &&
6339             (iocommand.Request.Type.Direction != XFER_NONE)) {
6340                 return -EINVAL;
6341         }
6342         if (iocommand.buf_size > 0) {
6343                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
6344                 if (buff == NULL)
6345                         return -ENOMEM;
6346                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
6347                         /* Copy the data into the buffer we created */
6348                         if (copy_from_user(buff, iocommand.buf,
6349                                 iocommand.buf_size)) {
6350                                 rc = -EFAULT;
6351                                 goto out_kfree;
6352                         }
6353                 } else {
6354                         memset(buff, 0, iocommand.buf_size);
6355                 }
6356         }
6357         c = cmd_alloc(h);
6358
6359         /* Fill in the command type */
6360         c->cmd_type = CMD_IOCTL_PEND;
6361         c->scsi_cmd = SCSI_CMD_BUSY;
6362         /* Fill in Command Header */
6363         c->Header.ReplyQueue = 0; /* unused in simple mode */
6364         if (iocommand.buf_size > 0) {   /* buffer to fill */
6365                 c->Header.SGList = 1;
6366                 c->Header.SGTotal = cpu_to_le16(1);
6367         } else  { /* no buffers to fill */
6368                 c->Header.SGList = 0;
6369                 c->Header.SGTotal = cpu_to_le16(0);
6370         }
6371         memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
6372
6373         /* Fill in Request block */
6374         memcpy(&c->Request, &iocommand.Request,
6375                 sizeof(c->Request));
6376
6377         /* Fill in the scatter gather information */
6378         if (iocommand.buf_size > 0) {
6379                 temp64 = dma_map_single(&h->pdev->dev, buff,
6380                         iocommand.buf_size, DMA_BIDIRECTIONAL);
6381                 if (dma_mapping_error(&h->pdev->dev, (dma_addr_t) temp64)) {
6382                         c->SG[0].Addr = cpu_to_le64(0);
6383                         c->SG[0].Len = cpu_to_le32(0);
6384                         rc = -ENOMEM;
6385                         goto out;
6386                 }
6387                 c->SG[0].Addr = cpu_to_le64(temp64);
6388                 c->SG[0].Len = cpu_to_le32(iocommand.buf_size);
6389                 c->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* not chaining */
6390         }
6391         rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6392                                         NO_TIMEOUT);
6393         if (iocommand.buf_size > 0)
6394                 hpsa_pci_unmap(h->pdev, c, 1, DMA_BIDIRECTIONAL);
6395         check_ioctl_unit_attention(h, c);
6396         if (rc) {
6397                 rc = -EIO;
6398                 goto out;
6399         }
6400
6401         /* Copy the error information out */
6402         memcpy(&iocommand.error_info, c->err_info,
6403                 sizeof(iocommand.error_info));
6404         if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
6405                 rc = -EFAULT;
6406                 goto out;
6407         }
6408         if ((iocommand.Request.Type.Direction & XFER_READ) &&
6409                 iocommand.buf_size > 0) {
6410                 /* Copy the data out of the buffer we created */
6411                 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
6412                         rc = -EFAULT;
6413                         goto out;
6414                 }
6415         }
6416 out:
6417         cmd_free(h, c);
6418 out_kfree:
6419         kfree(buff);
6420         return rc;
6421 }
6422
6423 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
6424 {
6425         BIG_IOCTL_Command_struct *ioc;
6426         struct CommandList *c;
6427         unsigned char **buff = NULL;
6428         int *buff_size = NULL;
6429         u64 temp64;
6430         BYTE sg_used = 0;
6431         int status = 0;
6432         u32 left;
6433         u32 sz;
6434         BYTE __user *data_ptr;
6435
6436         if (!argp)
6437                 return -EINVAL;
6438         if (!capable(CAP_SYS_RAWIO))
6439                 return -EPERM;
6440         ioc = vmemdup_user(argp, sizeof(*ioc));
6441         if (IS_ERR(ioc)) {
6442                 status = PTR_ERR(ioc);
6443                 goto cleanup1;
6444         }
6445         if ((ioc->buf_size < 1) &&
6446             (ioc->Request.Type.Direction != XFER_NONE)) {
6447                 status = -EINVAL;
6448                 goto cleanup1;
6449         }
6450         /* Check kmalloc limits  using all SGs */
6451         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
6452                 status = -EINVAL;
6453                 goto cleanup1;
6454         }
6455         if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
6456                 status = -EINVAL;
6457                 goto cleanup1;
6458         }
6459         buff = kcalloc(SG_ENTRIES_IN_CMD, sizeof(char *), GFP_KERNEL);
6460         if (!buff) {
6461                 status = -ENOMEM;
6462                 goto cleanup1;
6463         }
6464         buff_size = kmalloc_array(SG_ENTRIES_IN_CMD, sizeof(int), GFP_KERNEL);
6465         if (!buff_size) {
6466                 status = -ENOMEM;
6467                 goto cleanup1;
6468         }
6469         left = ioc->buf_size;
6470         data_ptr = ioc->buf;
6471         while (left) {
6472                 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
6473                 buff_size[sg_used] = sz;
6474                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
6475                 if (buff[sg_used] == NULL) {
6476                         status = -ENOMEM;
6477                         goto cleanup1;
6478                 }
6479                 if (ioc->Request.Type.Direction & XFER_WRITE) {
6480                         if (copy_from_user(buff[sg_used], data_ptr, sz)) {
6481                                 status = -EFAULT;
6482                                 goto cleanup1;
6483                         }
6484                 } else
6485                         memset(buff[sg_used], 0, sz);
6486                 left -= sz;
6487                 data_ptr += sz;
6488                 sg_used++;
6489         }
6490         c = cmd_alloc(h);
6491
6492         c->cmd_type = CMD_IOCTL_PEND;
6493         c->scsi_cmd = SCSI_CMD_BUSY;
6494         c->Header.ReplyQueue = 0;
6495         c->Header.SGList = (u8) sg_used;
6496         c->Header.SGTotal = cpu_to_le16(sg_used);
6497         memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
6498         memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
6499         if (ioc->buf_size > 0) {
6500                 int i;
6501                 for (i = 0; i < sg_used; i++) {
6502                         temp64 = dma_map_single(&h->pdev->dev, buff[i],
6503                                     buff_size[i], DMA_BIDIRECTIONAL);
6504                         if (dma_mapping_error(&h->pdev->dev,
6505                                                         (dma_addr_t) temp64)) {
6506                                 c->SG[i].Addr = cpu_to_le64(0);
6507                                 c->SG[i].Len = cpu_to_le32(0);
6508                                 hpsa_pci_unmap(h->pdev, c, i,
6509                                         DMA_BIDIRECTIONAL);
6510                                 status = -ENOMEM;
6511                                 goto cleanup0;
6512                         }
6513                         c->SG[i].Addr = cpu_to_le64(temp64);
6514                         c->SG[i].Len = cpu_to_le32(buff_size[i]);
6515                         c->SG[i].Ext = cpu_to_le32(0);
6516                 }
6517                 c->SG[--i].Ext = cpu_to_le32(HPSA_SG_LAST);
6518         }
6519         status = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6520                                                 NO_TIMEOUT);
6521         if (sg_used)
6522                 hpsa_pci_unmap(h->pdev, c, sg_used, DMA_BIDIRECTIONAL);
6523         check_ioctl_unit_attention(h, c);
6524         if (status) {
6525                 status = -EIO;
6526                 goto cleanup0;
6527         }
6528
6529         /* Copy the error information out */
6530         memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
6531         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
6532                 status = -EFAULT;
6533                 goto cleanup0;
6534         }
6535         if ((ioc->Request.Type.Direction & XFER_READ) && ioc->buf_size > 0) {
6536                 int i;
6537
6538                 /* Copy the data out of the buffer we created */
6539                 BYTE __user *ptr = ioc->buf;
6540                 for (i = 0; i < sg_used; i++) {
6541                         if (copy_to_user(ptr, buff[i], buff_size[i])) {
6542                                 status = -EFAULT;
6543                                 goto cleanup0;
6544                         }
6545                         ptr += buff_size[i];
6546                 }
6547         }
6548         status = 0;
6549 cleanup0:
6550         cmd_free(h, c);
6551 cleanup1:
6552         if (buff) {
6553                 int i;
6554
6555                 for (i = 0; i < sg_used; i++)
6556                         kfree(buff[i]);
6557                 kfree(buff);
6558         }
6559         kfree(buff_size);
6560         kvfree(ioc);
6561         return status;
6562 }
6563
6564 static void check_ioctl_unit_attention(struct ctlr_info *h,
6565         struct CommandList *c)
6566 {
6567         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
6568                         c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
6569                 (void) check_for_unit_attention(h, c);
6570 }
6571
6572 /*
6573  * ioctl
6574  */
6575 static int hpsa_ioctl(struct scsi_device *dev, unsigned int cmd,
6576                       void __user *arg)
6577 {
6578         struct ctlr_info *h;
6579         void __user *argp = (void __user *)arg;
6580         int rc;
6581
6582         h = sdev_to_hba(dev);
6583
6584         switch (cmd) {
6585         case CCISS_DEREGDISK:
6586         case CCISS_REGNEWDISK:
6587         case CCISS_REGNEWD:
6588                 hpsa_scan_start(h->scsi_host);
6589                 return 0;
6590         case CCISS_GETPCIINFO:
6591                 return hpsa_getpciinfo_ioctl(h, argp);
6592         case CCISS_GETDRIVVER:
6593                 return hpsa_getdrivver_ioctl(h, argp);
6594         case CCISS_PASSTHRU:
6595                 if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6596                         return -EAGAIN;
6597                 rc = hpsa_passthru_ioctl(h, argp);
6598                 atomic_inc(&h->passthru_cmds_avail);
6599                 return rc;
6600         case CCISS_BIG_PASSTHRU:
6601                 if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6602                         return -EAGAIN;
6603                 rc = hpsa_big_passthru_ioctl(h, argp);
6604                 atomic_inc(&h->passthru_cmds_avail);
6605                 return rc;
6606         default:
6607                 return -ENOTTY;
6608         }
6609 }
6610
6611 static void hpsa_send_host_reset(struct ctlr_info *h, u8 reset_type)
6612 {
6613         struct CommandList *c;
6614
6615         c = cmd_alloc(h);
6616
6617         /* fill_cmd can't fail here, no data buffer to map */
6618         (void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
6619                 RAID_CTLR_LUNID, TYPE_MSG);
6620         c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
6621         c->waiting = NULL;
6622         enqueue_cmd_and_start_io(h, c);
6623         /* Don't wait for completion, the reset won't complete.  Don't free
6624          * the command either.  This is the last command we will send before
6625          * re-initializing everything, so it doesn't matter and won't leak.
6626          */
6627         return;
6628 }
6629
6630 static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
6631         void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
6632         int cmd_type)
6633 {
6634         enum dma_data_direction dir = DMA_NONE;
6635
6636         c->cmd_type = CMD_IOCTL_PEND;
6637         c->scsi_cmd = SCSI_CMD_BUSY;
6638         c->Header.ReplyQueue = 0;
6639         if (buff != NULL && size > 0) {
6640                 c->Header.SGList = 1;
6641                 c->Header.SGTotal = cpu_to_le16(1);
6642         } else {
6643                 c->Header.SGList = 0;
6644                 c->Header.SGTotal = cpu_to_le16(0);
6645         }
6646         memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
6647
6648         if (cmd_type == TYPE_CMD) {
6649                 switch (cmd) {
6650                 case HPSA_INQUIRY:
6651                         /* are we trying to read a vital product page */
6652                         if (page_code & VPD_PAGE) {
6653                                 c->Request.CDB[1] = 0x01;
6654                                 c->Request.CDB[2] = (page_code & 0xff);
6655                         }
6656                         c->Request.CDBLen = 6;
6657                         c->Request.type_attr_dir =
6658                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6659                         c->Request.Timeout = 0;
6660                         c->Request.CDB[0] = HPSA_INQUIRY;
6661                         c->Request.CDB[4] = size & 0xFF;
6662                         break;
6663                 case RECEIVE_DIAGNOSTIC:
6664                         c->Request.CDBLen = 6;
6665                         c->Request.type_attr_dir =
6666                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6667                         c->Request.Timeout = 0;
6668                         c->Request.CDB[0] = cmd;
6669                         c->Request.CDB[1] = 1;
6670                         c->Request.CDB[2] = 1;
6671                         c->Request.CDB[3] = (size >> 8) & 0xFF;
6672                         c->Request.CDB[4] = size & 0xFF;
6673                         break;
6674                 case HPSA_REPORT_LOG:
6675                 case HPSA_REPORT_PHYS:
6676                         /* Talking to controller so It's a physical command
6677                            mode = 00 target = 0.  Nothing to write.
6678                          */
6679                         c->Request.CDBLen = 12;
6680                         c->Request.type_attr_dir =
6681                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6682                         c->Request.Timeout = 0;
6683                         c->Request.CDB[0] = cmd;
6684                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
6685                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6686                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6687                         c->Request.CDB[9] = size & 0xFF;
6688                         break;
6689                 case BMIC_SENSE_DIAG_OPTIONS:
6690                         c->Request.CDBLen = 16;
6691                         c->Request.type_attr_dir =
6692                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6693                         c->Request.Timeout = 0;
6694                         /* Spec says this should be BMIC_WRITE */
6695                         c->Request.CDB[0] = BMIC_READ;
6696                         c->Request.CDB[6] = BMIC_SENSE_DIAG_OPTIONS;
6697                         break;
6698                 case BMIC_SET_DIAG_OPTIONS:
6699                         c->Request.CDBLen = 16;
6700                         c->Request.type_attr_dir =
6701                                         TYPE_ATTR_DIR(cmd_type,
6702                                                 ATTR_SIMPLE, XFER_WRITE);
6703                         c->Request.Timeout = 0;
6704                         c->Request.CDB[0] = BMIC_WRITE;
6705                         c->Request.CDB[6] = BMIC_SET_DIAG_OPTIONS;
6706                         break;
6707                 case HPSA_CACHE_FLUSH:
6708                         c->Request.CDBLen = 12;
6709                         c->Request.type_attr_dir =
6710                                         TYPE_ATTR_DIR(cmd_type,
6711                                                 ATTR_SIMPLE, XFER_WRITE);
6712                         c->Request.Timeout = 0;
6713                         c->Request.CDB[0] = BMIC_WRITE;
6714                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
6715                         c->Request.CDB[7] = (size >> 8) & 0xFF;
6716                         c->Request.CDB[8] = size & 0xFF;
6717                         break;
6718                 case TEST_UNIT_READY:
6719                         c->Request.CDBLen = 6;
6720                         c->Request.type_attr_dir =
6721                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6722                         c->Request.Timeout = 0;
6723                         break;
6724                 case HPSA_GET_RAID_MAP:
6725                         c->Request.CDBLen = 12;
6726                         c->Request.type_attr_dir =
6727                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6728                         c->Request.Timeout = 0;
6729                         c->Request.CDB[0] = HPSA_CISS_READ;
6730                         c->Request.CDB[1] = cmd;
6731                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
6732                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6733                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6734                         c->Request.CDB[9] = size & 0xFF;
6735                         break;
6736                 case BMIC_SENSE_CONTROLLER_PARAMETERS:
6737                         c->Request.CDBLen = 10;
6738                         c->Request.type_attr_dir =
6739                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6740                         c->Request.Timeout = 0;
6741                         c->Request.CDB[0] = BMIC_READ;
6742                         c->Request.CDB[6] = BMIC_SENSE_CONTROLLER_PARAMETERS;
6743                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6744                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6745                         break;
6746                 case BMIC_IDENTIFY_PHYSICAL_DEVICE:
6747                         c->Request.CDBLen = 10;
6748                         c->Request.type_attr_dir =
6749                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6750                         c->Request.Timeout = 0;
6751                         c->Request.CDB[0] = BMIC_READ;
6752                         c->Request.CDB[6] = BMIC_IDENTIFY_PHYSICAL_DEVICE;
6753                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6754                         c->Request.CDB[8] = (size >> 8) & 0XFF;
6755                         break;
6756                 case BMIC_SENSE_SUBSYSTEM_INFORMATION:
6757                         c->Request.CDBLen = 10;
6758                         c->Request.type_attr_dir =
6759                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6760                         c->Request.Timeout = 0;
6761                         c->Request.CDB[0] = BMIC_READ;
6762                         c->Request.CDB[6] = BMIC_SENSE_SUBSYSTEM_INFORMATION;
6763                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6764                         c->Request.CDB[8] = (size >> 8) & 0XFF;
6765                         break;
6766                 case BMIC_SENSE_STORAGE_BOX_PARAMS:
6767                         c->Request.CDBLen = 10;
6768                         c->Request.type_attr_dir =
6769                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6770                         c->Request.Timeout = 0;
6771                         c->Request.CDB[0] = BMIC_READ;
6772                         c->Request.CDB[6] = BMIC_SENSE_STORAGE_BOX_PARAMS;
6773                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6774                         c->Request.CDB[8] = (size >> 8) & 0XFF;
6775                         break;
6776                 case BMIC_IDENTIFY_CONTROLLER:
6777                         c->Request.CDBLen = 10;
6778                         c->Request.type_attr_dir =
6779                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6780                         c->Request.Timeout = 0;
6781                         c->Request.CDB[0] = BMIC_READ;
6782                         c->Request.CDB[1] = 0;
6783                         c->Request.CDB[2] = 0;
6784                         c->Request.CDB[3] = 0;
6785                         c->Request.CDB[4] = 0;
6786                         c->Request.CDB[5] = 0;
6787                         c->Request.CDB[6] = BMIC_IDENTIFY_CONTROLLER;
6788                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6789                         c->Request.CDB[8] = (size >> 8) & 0XFF;
6790                         c->Request.CDB[9] = 0;
6791                         break;
6792                 default:
6793                         dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
6794                         BUG();
6795                 }
6796         } else if (cmd_type == TYPE_MSG) {
6797                 switch (cmd) {
6798
6799                 case  HPSA_PHYS_TARGET_RESET:
6800                         c->Request.CDBLen = 16;
6801                         c->Request.type_attr_dir =
6802                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6803                         c->Request.Timeout = 0; /* Don't time out */
6804                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
6805                         c->Request.CDB[0] = HPSA_RESET;
6806                         c->Request.CDB[1] = HPSA_TARGET_RESET_TYPE;
6807                         /* Physical target reset needs no control bytes 4-7*/
6808                         c->Request.CDB[4] = 0x00;
6809                         c->Request.CDB[5] = 0x00;
6810                         c->Request.CDB[6] = 0x00;
6811                         c->Request.CDB[7] = 0x00;
6812                         break;
6813                 case  HPSA_DEVICE_RESET_MSG:
6814                         c->Request.CDBLen = 16;
6815                         c->Request.type_attr_dir =
6816                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6817                         c->Request.Timeout = 0; /* Don't time out */
6818                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
6819                         c->Request.CDB[0] =  cmd;
6820                         c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
6821                         /* If bytes 4-7 are zero, it means reset the */
6822                         /* LunID device */
6823                         c->Request.CDB[4] = 0x00;
6824                         c->Request.CDB[5] = 0x00;
6825                         c->Request.CDB[6] = 0x00;
6826                         c->Request.CDB[7] = 0x00;
6827                         break;
6828                 default:
6829                         dev_warn(&h->pdev->dev, "unknown message type %d\n",
6830                                 cmd);
6831                         BUG();
6832                 }
6833         } else {
6834                 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
6835                 BUG();
6836         }
6837
6838         switch (GET_DIR(c->Request.type_attr_dir)) {
6839         case XFER_READ:
6840                 dir = DMA_FROM_DEVICE;
6841                 break;
6842         case XFER_WRITE:
6843                 dir = DMA_TO_DEVICE;
6844                 break;
6845         case XFER_NONE:
6846                 dir = DMA_NONE;
6847                 break;
6848         default:
6849                 dir = DMA_BIDIRECTIONAL;
6850         }
6851         if (hpsa_map_one(h->pdev, c, buff, size, dir))
6852                 return -1;
6853         return 0;
6854 }
6855
6856 /*
6857  * Map (physical) PCI mem into (virtual) kernel space
6858  */
6859 static void __iomem *remap_pci_mem(ulong base, ulong size)
6860 {
6861         ulong page_base = ((ulong) base) & PAGE_MASK;
6862         ulong page_offs = ((ulong) base) - page_base;
6863         void __iomem *page_remapped = ioremap_nocache(page_base,
6864                 page_offs + size);
6865
6866         return page_remapped ? (page_remapped + page_offs) : NULL;
6867 }
6868
6869 static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
6870 {
6871         return h->access.command_completed(h, q);
6872 }
6873
6874 static inline bool interrupt_pending(struct ctlr_info *h)
6875 {
6876         return h->access.intr_pending(h);
6877 }
6878
6879 static inline long interrupt_not_for_us(struct ctlr_info *h)
6880 {
6881         return (h->access.intr_pending(h) == 0) ||
6882                 (h->interrupts_enabled == 0);
6883 }
6884
6885 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
6886         u32 raw_tag)
6887 {
6888         if (unlikely(tag_index >= h->nr_cmds)) {
6889                 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
6890                 return 1;
6891         }
6892         return 0;
6893 }
6894
6895 static inline void finish_cmd(struct CommandList *c)
6896 {
6897         dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
6898         if (likely(c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_SCSI
6899                         || c->cmd_type == CMD_IOACCEL2))
6900                 complete_scsi_command(c);
6901         else if (c->cmd_type == CMD_IOCTL_PEND || c->cmd_type == IOACCEL2_TMF)
6902                 complete(c->waiting);
6903 }
6904
6905 /* process completion of an indexed ("direct lookup") command */
6906 static inline void process_indexed_cmd(struct ctlr_info *h,
6907         u32 raw_tag)
6908 {
6909         u32 tag_index;
6910         struct CommandList *c;
6911
6912         tag_index = raw_tag >> DIRECT_LOOKUP_SHIFT;
6913         if (!bad_tag(h, tag_index, raw_tag)) {
6914                 c = h->cmd_pool + tag_index;
6915                 finish_cmd(c);
6916         }
6917 }
6918
6919 /* Some controllers, like p400, will give us one interrupt
6920  * after a soft reset, even if we turned interrupts off.
6921  * Only need to check for this in the hpsa_xxx_discard_completions
6922  * functions.
6923  */
6924 static int ignore_bogus_interrupt(struct ctlr_info *h)
6925 {
6926         if (likely(!reset_devices))
6927                 return 0;
6928
6929         if (likely(h->interrupts_enabled))
6930                 return 0;
6931
6932         dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
6933                 "(known firmware bug.)  Ignoring.\n");
6934
6935         return 1;
6936 }
6937
6938 /*
6939  * Convert &h->q[x] (passed to interrupt handlers) back to h.
6940  * Relies on (h-q[x] == x) being true for x such that
6941  * 0 <= x < MAX_REPLY_QUEUES.
6942  */
6943 static struct ctlr_info *queue_to_hba(u8 *queue)
6944 {
6945         return container_of((queue - *queue), struct ctlr_info, q[0]);
6946 }
6947
6948 static irqreturn_t hpsa_intx_discard_completions(int irq, void *queue)
6949 {
6950         struct ctlr_info *h = queue_to_hba(queue);
6951         u8 q = *(u8 *) queue;
6952         u32 raw_tag;
6953
6954         if (ignore_bogus_interrupt(h))
6955                 return IRQ_NONE;
6956
6957         if (interrupt_not_for_us(h))
6958                 return IRQ_NONE;
6959         h->last_intr_timestamp = get_jiffies_64();
6960         while (interrupt_pending(h)) {
6961                 raw_tag = get_next_completion(h, q);
6962                 while (raw_tag != FIFO_EMPTY)
6963                         raw_tag = next_command(h, q);
6964         }
6965         return IRQ_HANDLED;
6966 }
6967
6968 static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
6969 {
6970         struct ctlr_info *h = queue_to_hba(queue);
6971         u32 raw_tag;
6972         u8 q = *(u8 *) queue;
6973
6974         if (ignore_bogus_interrupt(h))
6975                 return IRQ_NONE;
6976
6977         h->last_intr_timestamp = get_jiffies_64();
6978         raw_tag = get_next_completion(h, q);
6979         while (raw_tag != FIFO_EMPTY)
6980                 raw_tag = next_command(h, q);
6981         return IRQ_HANDLED;
6982 }
6983
6984 static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
6985 {
6986         struct ctlr_info *h = queue_to_hba((u8 *) queue);
6987         u32 raw_tag;
6988         u8 q = *(u8 *) queue;
6989
6990         if (interrupt_not_for_us(h))
6991                 return IRQ_NONE;
6992         h->last_intr_timestamp = get_jiffies_64();
6993         while (interrupt_pending(h)) {
6994                 raw_tag = get_next_completion(h, q);
6995                 while (raw_tag != FIFO_EMPTY) {
6996                         process_indexed_cmd(h, raw_tag);
6997                         raw_tag = next_command(h, q);
6998                 }
6999         }
7000         return IRQ_HANDLED;
7001 }
7002
7003 static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
7004 {
7005         struct ctlr_info *h = queue_to_hba(queue);
7006         u32 raw_tag;
7007         u8 q = *(u8 *) queue;
7008
7009         h->last_intr_timestamp = get_jiffies_64();
7010         raw_tag = get_next_completion(h, q);
7011         while (raw_tag != FIFO_EMPTY) {
7012                 process_indexed_cmd(h, raw_tag);
7013                 raw_tag = next_command(h, q);
7014         }
7015         return IRQ_HANDLED;
7016 }
7017
7018 /* Send a message CDB to the firmware. Careful, this only works
7019  * in simple mode, not performant mode due to the tag lookup.
7020  * We only ever use this immediately after a controller reset.
7021  */
7022 static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
7023                         unsigned char type)
7024 {
7025         struct Command {
7026                 struct CommandListHeader CommandHeader;
7027                 struct RequestBlock Request;
7028                 struct ErrDescriptor ErrorDescriptor;
7029         };
7030         struct Command *cmd;
7031         static const size_t cmd_sz = sizeof(*cmd) +
7032                                         sizeof(cmd->ErrorDescriptor);
7033         dma_addr_t paddr64;
7034         __le32 paddr32;
7035         u32 tag;
7036         void __iomem *vaddr;
7037         int i, err;
7038
7039         vaddr = pci_ioremap_bar(pdev, 0);
7040         if (vaddr == NULL)
7041                 return -ENOMEM;
7042
7043         /* The Inbound Post Queue only accepts 32-bit physical addresses for the
7044          * CCISS commands, so they must be allocated from the lower 4GiB of
7045          * memory.
7046          */
7047         err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
7048         if (err) {
7049                 iounmap(vaddr);
7050                 return err;
7051         }
7052
7053         cmd = dma_alloc_coherent(&pdev->dev, cmd_sz, &paddr64, GFP_KERNEL);
7054         if (cmd == NULL) {
7055                 iounmap(vaddr);
7056                 return -ENOMEM;
7057         }
7058
7059         /* This must fit, because of the 32-bit consistent DMA mask.  Also,
7060          * although there's no guarantee, we assume that the address is at
7061          * least 4-byte aligned (most likely, it's page-aligned).
7062          */
7063         paddr32 = cpu_to_le32(paddr64);
7064
7065         cmd->CommandHeader.ReplyQueue = 0;
7066         cmd->CommandHeader.SGList = 0;
7067         cmd->CommandHeader.SGTotal = cpu_to_le16(0);
7068         cmd->CommandHeader.tag = cpu_to_le64(paddr64);
7069         memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
7070
7071         cmd->Request.CDBLen = 16;
7072         cmd->Request.type_attr_dir =
7073                         TYPE_ATTR_DIR(TYPE_MSG, ATTR_HEADOFQUEUE, XFER_NONE);
7074         cmd->Request.Timeout = 0; /* Don't time out */
7075         cmd->Request.CDB[0] = opcode;
7076         cmd->Request.CDB[1] = type;
7077         memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
7078         cmd->ErrorDescriptor.Addr =
7079                         cpu_to_le64((le32_to_cpu(paddr32) + sizeof(*cmd)));
7080         cmd->ErrorDescriptor.Len = cpu_to_le32(sizeof(struct ErrorInfo));
7081
7082         writel(le32_to_cpu(paddr32), vaddr + SA5_REQUEST_PORT_OFFSET);
7083
7084         for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
7085                 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
7086                 if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr64)
7087                         break;
7088                 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
7089         }
7090
7091         iounmap(vaddr);
7092
7093         /* we leak the DMA buffer here ... no choice since the controller could
7094          *  still complete the command.
7095          */
7096         if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
7097                 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
7098                         opcode, type);
7099                 return -ETIMEDOUT;
7100         }
7101
7102         dma_free_coherent(&pdev->dev, cmd_sz, cmd, paddr64);
7103
7104         if (tag & HPSA_ERROR_BIT) {
7105                 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
7106                         opcode, type);
7107                 return -EIO;
7108         }
7109
7110         dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
7111                 opcode, type);
7112         return 0;
7113 }
7114
7115 #define hpsa_noop(p) hpsa_message(p, 3, 0)
7116
7117 static int hpsa_controller_hard_reset(struct pci_dev *pdev,
7118         void __iomem *vaddr, u32 use_doorbell)
7119 {
7120
7121         if (use_doorbell) {
7122                 /* For everything after the P600, the PCI power state method
7123                  * of resetting the controller doesn't work, so we have this
7124                  * other way using the doorbell register.
7125                  */
7126                 dev_info(&pdev->dev, "using doorbell to reset controller\n");
7127                 writel(use_doorbell, vaddr + SA5_DOORBELL);
7128
7129                 /* PMC hardware guys tell us we need a 10 second delay after
7130                  * doorbell reset and before any attempt to talk to the board
7131                  * at all to ensure that this actually works and doesn't fall
7132                  * over in some weird corner cases.
7133                  */
7134                 msleep(10000);
7135         } else { /* Try to do it the PCI power state way */
7136
7137                 /* Quoting from the Open CISS Specification: "The Power
7138                  * Management Control/Status Register (CSR) controls the power
7139                  * state of the device.  The normal operating state is D0,
7140                  * CSR=00h.  The software off state is D3, CSR=03h.  To reset
7141                  * the controller, place the interface device in D3 then to D0,
7142                  * this causes a secondary PCI reset which will reset the
7143                  * controller." */
7144
7145                 int rc = 0;
7146
7147                 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
7148
7149                 /* enter the D3hot power management state */
7150                 rc = pci_set_power_state(pdev, PCI_D3hot);
7151                 if (rc)
7152                         return rc;
7153
7154                 msleep(500);
7155
7156                 /* enter the D0 power management state */
7157                 rc = pci_set_power_state(pdev, PCI_D0);
7158                 if (rc)
7159                         return rc;
7160
7161                 /*
7162                  * The P600 requires a small delay when changing states.
7163                  * Otherwise we may think the board did not reset and we bail.
7164                  * This for kdump only and is particular to the P600.
7165                  */
7166                 msleep(500);
7167         }
7168         return 0;
7169 }
7170
7171 static void init_driver_version(char *driver_version, int len)
7172 {
7173         memset(driver_version, 0, len);
7174         strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
7175 }
7176
7177 static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
7178 {
7179         char *driver_version;
7180         int i, size = sizeof(cfgtable->driver_version);
7181
7182         driver_version = kmalloc(size, GFP_KERNEL);
7183         if (!driver_version)
7184                 return -ENOMEM;
7185
7186         init_driver_version(driver_version, size);
7187         for (i = 0; i < size; i++)
7188                 writeb(driver_version[i], &cfgtable->driver_version[i]);
7189         kfree(driver_version);
7190         return 0;
7191 }
7192
7193 static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
7194                                           unsigned char *driver_ver)
7195 {
7196         int i;
7197
7198         for (i = 0; i < sizeof(cfgtable->driver_version); i++)
7199                 driver_ver[i] = readb(&cfgtable->driver_version[i]);
7200 }
7201
7202 static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
7203 {
7204
7205         char *driver_ver, *old_driver_ver;
7206         int rc, size = sizeof(cfgtable->driver_version);
7207
7208         old_driver_ver = kmalloc_array(2, size, GFP_KERNEL);
7209         if (!old_driver_ver)
7210                 return -ENOMEM;
7211         driver_ver = old_driver_ver + size;
7212
7213         /* After a reset, the 32 bytes of "driver version" in the cfgtable
7214          * should have been changed, otherwise we know the reset failed.
7215          */
7216         init_driver_version(old_driver_ver, size);
7217         read_driver_ver_from_cfgtable(cfgtable, driver_ver);
7218         rc = !memcmp(driver_ver, old_driver_ver, size);
7219         kfree(old_driver_ver);
7220         return rc;
7221 }
7222 /* This does a hard reset of the controller using PCI power management
7223  * states or the using the doorbell register.
7224  */
7225 static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev, u32 board_id)
7226 {
7227         u64 cfg_offset;
7228         u32 cfg_base_addr;
7229         u64 cfg_base_addr_index;
7230         void __iomem *vaddr;
7231         unsigned long paddr;
7232         u32 misc_fw_support;
7233         int rc;
7234         struct CfgTable __iomem *cfgtable;
7235         u32 use_doorbell;
7236         u16 command_register;
7237
7238         /* For controllers as old as the P600, this is very nearly
7239          * the same thing as
7240          *
7241          * pci_save_state(pci_dev);
7242          * pci_set_power_state(pci_dev, PCI_D3hot);
7243          * pci_set_power_state(pci_dev, PCI_D0);
7244          * pci_restore_state(pci_dev);
7245          *
7246          * For controllers newer than the P600, the pci power state
7247          * method of resetting doesn't work so we have another way
7248          * using the doorbell register.
7249          */
7250
7251         if (!ctlr_is_resettable(board_id)) {
7252                 dev_warn(&pdev->dev, "Controller not resettable\n");
7253                 return -ENODEV;
7254         }
7255
7256         /* if controller is soft- but not hard resettable... */
7257         if (!ctlr_is_hard_resettable(board_id))
7258                 return -ENOTSUPP; /* try soft reset later. */
7259
7260         /* Save the PCI command register */
7261         pci_read_config_word(pdev, 4, &command_register);
7262         pci_save_state(pdev);
7263
7264         /* find the first memory BAR, so we can find the cfg table */
7265         rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
7266         if (rc)
7267                 return rc;
7268         vaddr = remap_pci_mem(paddr, 0x250);
7269         if (!vaddr)
7270                 return -ENOMEM;
7271
7272         /* find cfgtable in order to check if reset via doorbell is supported */
7273         rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
7274                                         &cfg_base_addr_index, &cfg_offset);
7275         if (rc)
7276                 goto unmap_vaddr;
7277         cfgtable = remap_pci_mem(pci_resource_start(pdev,
7278                        cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
7279         if (!cfgtable) {
7280                 rc = -ENOMEM;
7281                 goto unmap_vaddr;
7282         }
7283         rc = write_driver_ver_to_cfgtable(cfgtable);
7284         if (rc)
7285                 goto unmap_cfgtable;
7286
7287         /* If reset via doorbell register is supported, use that.
7288          * There are two such methods.  Favor the newest method.
7289          */
7290         misc_fw_support = readl(&cfgtable->misc_fw_support);
7291         use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
7292         if (use_doorbell) {
7293                 use_doorbell = DOORBELL_CTLR_RESET2;
7294         } else {
7295                 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
7296                 if (use_doorbell) {
7297                         dev_warn(&pdev->dev,
7298                                 "Soft reset not supported. Firmware update is required.\n");
7299                         rc = -ENOTSUPP; /* try soft reset */
7300                         goto unmap_cfgtable;
7301                 }
7302         }
7303
7304         rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
7305         if (rc)
7306                 goto unmap_cfgtable;
7307
7308         pci_restore_state(pdev);
7309         pci_write_config_word(pdev, 4, command_register);
7310
7311         /* Some devices (notably the HP Smart Array 5i Controller)
7312            need a little pause here */
7313         msleep(HPSA_POST_RESET_PAUSE_MSECS);
7314
7315         rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
7316         if (rc) {
7317                 dev_warn(&pdev->dev,
7318                         "Failed waiting for board to become ready after hard reset\n");
7319                 goto unmap_cfgtable;
7320         }
7321
7322         rc = controller_reset_failed(vaddr);
7323         if (rc < 0)
7324                 goto unmap_cfgtable;
7325         if (rc) {
7326                 dev_warn(&pdev->dev, "Unable to successfully reset "
7327                         "controller. Will try soft reset.\n");
7328                 rc = -ENOTSUPP;
7329         } else {
7330                 dev_info(&pdev->dev, "board ready after hard reset.\n");
7331         }
7332
7333 unmap_cfgtable:
7334         iounmap(cfgtable);
7335
7336 unmap_vaddr:
7337         iounmap(vaddr);
7338         return rc;
7339 }
7340
7341 /*
7342  *  We cannot read the structure directly, for portability we must use
7343  *   the io functions.
7344  *   This is for debug only.
7345  */
7346 static void print_cfg_table(struct device *dev, struct CfgTable __iomem *tb)
7347 {
7348 #ifdef HPSA_DEBUG
7349         int i;
7350         char temp_name[17];
7351
7352         dev_info(dev, "Controller Configuration information\n");
7353         dev_info(dev, "------------------------------------\n");
7354         for (i = 0; i < 4; i++)
7355                 temp_name[i] = readb(&(tb->Signature[i]));
7356         temp_name[4] = '\0';
7357         dev_info(dev, "   Signature = %s\n", temp_name);
7358         dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
7359         dev_info(dev, "   Transport methods supported = 0x%x\n",
7360                readl(&(tb->TransportSupport)));
7361         dev_info(dev, "   Transport methods active = 0x%x\n",
7362                readl(&(tb->TransportActive)));
7363         dev_info(dev, "   Requested transport Method = 0x%x\n",
7364                readl(&(tb->HostWrite.TransportRequest)));
7365         dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
7366                readl(&(tb->HostWrite.CoalIntDelay)));
7367         dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
7368                readl(&(tb->HostWrite.CoalIntCount)));
7369         dev_info(dev, "   Max outstanding commands = %d\n",
7370                readl(&(tb->CmdsOutMax)));
7371         dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
7372         for (i = 0; i < 16; i++)
7373                 temp_name[i] = readb(&(tb->ServerName[i]));
7374         temp_name[16] = '\0';
7375         dev_info(dev, "   Server Name = %s\n", temp_name);
7376         dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
7377                 readl(&(tb->HeartBeat)));
7378 #endif                          /* HPSA_DEBUG */
7379 }
7380
7381 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
7382 {
7383         int i, offset, mem_type, bar_type;
7384
7385         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
7386                 return 0;
7387         offset = 0;
7388         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
7389                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
7390                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
7391                         offset += 4;
7392                 else {
7393                         mem_type = pci_resource_flags(pdev, i) &
7394                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
7395                         switch (mem_type) {
7396                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
7397                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
7398                                 offset += 4;    /* 32 bit */
7399                                 break;
7400                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
7401                                 offset += 8;
7402                                 break;
7403                         default:        /* reserved in PCI 2.2 */
7404                                 dev_warn(&pdev->dev,
7405                                        "base address is invalid\n");
7406                                 return -1;
7407                                 break;
7408                         }
7409                 }
7410                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
7411                         return i + 1;
7412         }
7413         return -1;
7414 }
7415
7416 static void hpsa_disable_interrupt_mode(struct ctlr_info *h)
7417 {
7418         pci_free_irq_vectors(h->pdev);
7419         h->msix_vectors = 0;
7420 }
7421
7422 static void hpsa_setup_reply_map(struct ctlr_info *h)
7423 {
7424         const struct cpumask *mask;
7425         unsigned int queue, cpu;
7426
7427         for (queue = 0; queue < h->msix_vectors; queue++) {
7428                 mask = pci_irq_get_affinity(h->pdev, queue);
7429                 if (!mask)
7430                         goto fallback;
7431
7432                 for_each_cpu(cpu, mask)
7433                         h->reply_map[cpu] = queue;
7434         }
7435         return;
7436
7437 fallback:
7438         for_each_possible_cpu(cpu)
7439                 h->reply_map[cpu] = 0;
7440 }
7441
7442 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
7443  * controllers that are capable. If not, we use legacy INTx mode.
7444  */
7445 static int hpsa_interrupt_mode(struct ctlr_info *h)
7446 {
7447         unsigned int flags = PCI_IRQ_LEGACY;
7448         int ret;
7449
7450         /* Some boards advertise MSI but don't really support it */
7451         switch (h->board_id) {
7452         case 0x40700E11:
7453         case 0x40800E11:
7454         case 0x40820E11:
7455         case 0x40830E11:
7456                 break;
7457         default:
7458                 ret = pci_alloc_irq_vectors(h->pdev, 1, MAX_REPLY_QUEUES,
7459                                 PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
7460                 if (ret > 0) {
7461                         h->msix_vectors = ret;
7462                         return 0;
7463                 }
7464
7465                 flags |= PCI_IRQ_MSI;
7466                 break;
7467         }
7468
7469         ret = pci_alloc_irq_vectors(h->pdev, 1, 1, flags);
7470         if (ret < 0)
7471                 return ret;
7472         return 0;
7473 }
7474
7475 static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id,
7476                                 bool *legacy_board)
7477 {
7478         int i;
7479         u32 subsystem_vendor_id, subsystem_device_id;
7480
7481         subsystem_vendor_id = pdev->subsystem_vendor;
7482         subsystem_device_id = pdev->subsystem_device;
7483         *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
7484                     subsystem_vendor_id;
7485
7486         if (legacy_board)
7487                 *legacy_board = false;
7488         for (i = 0; i < ARRAY_SIZE(products); i++)
7489                 if (*board_id == products[i].board_id) {
7490                         if (products[i].access != &SA5A_access &&
7491                             products[i].access != &SA5B_access)
7492                                 return i;
7493                         dev_warn(&pdev->dev,
7494                                  "legacy board ID: 0x%08x\n",
7495                                  *board_id);
7496                         if (legacy_board)
7497                             *legacy_board = true;
7498                         return i;
7499                 }
7500
7501         dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x\n", *board_id);
7502         if (legacy_board)
7503                 *legacy_board = true;
7504         return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
7505 }
7506
7507 static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
7508                                     unsigned long *memory_bar)
7509 {
7510         int i;
7511
7512         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
7513                 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
7514                         /* addressing mode bits already removed */
7515                         *memory_bar = pci_resource_start(pdev, i);
7516                         dev_dbg(&pdev->dev, "memory BAR = %lx\n",
7517                                 *memory_bar);
7518                         return 0;
7519                 }
7520         dev_warn(&pdev->dev, "no memory BAR found\n");
7521         return -ENODEV;
7522 }
7523
7524 static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
7525                                      int wait_for_ready)
7526 {
7527         int i, iterations;
7528         u32 scratchpad;
7529         if (wait_for_ready)
7530                 iterations = HPSA_BOARD_READY_ITERATIONS;
7531         else
7532                 iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
7533
7534         for (i = 0; i < iterations; i++) {
7535                 scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
7536                 if (wait_for_ready) {
7537                         if (scratchpad == HPSA_FIRMWARE_READY)
7538                                 return 0;
7539                 } else {
7540                         if (scratchpad != HPSA_FIRMWARE_READY)
7541                                 return 0;
7542                 }
7543                 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
7544         }
7545         dev_warn(&pdev->dev, "board not ready, timed out.\n");
7546         return -ENODEV;
7547 }
7548
7549 static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
7550                                u32 *cfg_base_addr, u64 *cfg_base_addr_index,
7551                                u64 *cfg_offset)
7552 {
7553         *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
7554         *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
7555         *cfg_base_addr &= (u32) 0x0000ffff;
7556         *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
7557         if (*cfg_base_addr_index == -1) {
7558                 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
7559                 return -ENODEV;
7560         }
7561         return 0;
7562 }
7563
7564 static void hpsa_free_cfgtables(struct ctlr_info *h)
7565 {
7566         if (h->transtable) {
7567                 iounmap(h->transtable);
7568                 h->transtable = NULL;
7569         }
7570         if (h->cfgtable) {
7571                 iounmap(h->cfgtable);
7572                 h->cfgtable = NULL;
7573         }
7574 }
7575
7576 /* Find and map CISS config table and transfer table
7577 + * several items must be unmapped (freed) later
7578 + * */
7579 static int hpsa_find_cfgtables(struct ctlr_info *h)
7580 {
7581         u64 cfg_offset;
7582         u32 cfg_base_addr;
7583         u64 cfg_base_addr_index;
7584         u32 trans_offset;
7585         int rc;
7586
7587         rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
7588                 &cfg_base_addr_index, &cfg_offset);
7589         if (rc)
7590                 return rc;
7591         h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
7592                        cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
7593         if (!h->cfgtable) {
7594                 dev_err(&h->pdev->dev, "Failed mapping cfgtable\n");
7595                 return -ENOMEM;
7596         }
7597         rc = write_driver_ver_to_cfgtable(h->cfgtable);
7598         if (rc)
7599                 return rc;
7600         /* Find performant mode table. */
7601         trans_offset = readl(&h->cfgtable->TransMethodOffset);
7602         h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
7603                                 cfg_base_addr_index)+cfg_offset+trans_offset,
7604                                 sizeof(*h->transtable));
7605         if (!h->transtable) {
7606                 dev_err(&h->pdev->dev, "Failed mapping transfer table\n");
7607                 hpsa_free_cfgtables(h);
7608                 return -ENOMEM;
7609         }
7610         return 0;
7611 }
7612
7613 static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
7614 {
7615 #define MIN_MAX_COMMANDS 16
7616         BUILD_BUG_ON(MIN_MAX_COMMANDS <= HPSA_NRESERVED_CMDS);
7617
7618         h->max_commands = readl(&h->cfgtable->MaxPerformantModeCommands);
7619
7620         /* Limit commands in memory limited kdump scenario. */
7621         if (reset_devices && h->max_commands > 32)
7622                 h->max_commands = 32;
7623
7624         if (h->max_commands < MIN_MAX_COMMANDS) {
7625                 dev_warn(&h->pdev->dev,
7626                         "Controller reports max supported commands of %d Using %d instead. Ensure that firmware is up to date.\n",
7627                         h->max_commands,
7628                         MIN_MAX_COMMANDS);
7629                 h->max_commands = MIN_MAX_COMMANDS;
7630         }
7631 }
7632
7633 /* If the controller reports that the total max sg entries is greater than 512,
7634  * then we know that chained SG blocks work.  (Original smart arrays did not
7635  * support chained SG blocks and would return zero for max sg entries.)
7636  */
7637 static int hpsa_supports_chained_sg_blocks(struct ctlr_info *h)
7638 {
7639         return h->maxsgentries > 512;
7640 }
7641
7642 /* Interrogate the hardware for some limits:
7643  * max commands, max SG elements without chaining, and with chaining,
7644  * SG chain block size, etc.
7645  */
7646 static void hpsa_find_board_params(struct ctlr_info *h)
7647 {
7648         hpsa_get_max_perf_mode_cmds(h);
7649         h->nr_cmds = h->max_commands;
7650         h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
7651         h->fw_support = readl(&(h->cfgtable->misc_fw_support));
7652         if (hpsa_supports_chained_sg_blocks(h)) {
7653                 /* Limit in-command s/g elements to 32 save dma'able memory. */
7654                 h->max_cmd_sg_entries = 32;
7655                 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries;
7656                 h->maxsgentries--; /* save one for chain pointer */
7657         } else {
7658                 /*
7659                  * Original smart arrays supported at most 31 s/g entries
7660                  * embedded inline in the command (trying to use more
7661                  * would lock up the controller)
7662                  */
7663                 h->max_cmd_sg_entries = 31;
7664                 h->maxsgentries = 31; /* default to traditional values */
7665                 h->chainsize = 0;
7666         }
7667
7668         /* Find out what task management functions are supported and cache */
7669         h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
7670         if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags))
7671                 dev_warn(&h->pdev->dev, "Physical aborts not supported\n");
7672         if (!(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
7673                 dev_warn(&h->pdev->dev, "Logical aborts not supported\n");
7674         if (!(HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags))
7675                 dev_warn(&h->pdev->dev, "HP SSD Smart Path aborts not supported\n");
7676 }
7677
7678 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
7679 {
7680         if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
7681                 dev_err(&h->pdev->dev, "not a valid CISS config table\n");
7682                 return false;
7683         }
7684         return true;
7685 }
7686
7687 static inline void hpsa_set_driver_support_bits(struct ctlr_info *h)
7688 {
7689         u32 driver_support;
7690
7691         driver_support = readl(&(h->cfgtable->driver_support));
7692         /* Need to enable prefetch in the SCSI core for 6400 in x86 */
7693 #ifdef CONFIG_X86
7694         driver_support |= ENABLE_SCSI_PREFETCH;
7695 #endif
7696         driver_support |= ENABLE_UNIT_ATTN;
7697         writel(driver_support, &(h->cfgtable->driver_support));
7698 }
7699
7700 /* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
7701  * in a prefetch beyond physical memory.
7702  */
7703 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
7704 {
7705         u32 dma_prefetch;
7706
7707         if (h->board_id != 0x3225103C)
7708                 return;
7709         dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
7710         dma_prefetch |= 0x8000;
7711         writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
7712 }
7713
7714 static int hpsa_wait_for_clear_event_notify_ack(struct ctlr_info *h)
7715 {
7716         int i;
7717         u32 doorbell_value;
7718         unsigned long flags;
7719         /* wait until the clear_event_notify bit 6 is cleared by controller. */
7720         for (i = 0; i < MAX_CLEAR_EVENT_WAIT; i++) {
7721                 spin_lock_irqsave(&h->lock, flags);
7722                 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
7723                 spin_unlock_irqrestore(&h->lock, flags);
7724                 if (!(doorbell_value & DOORBELL_CLEAR_EVENTS))
7725                         goto done;
7726                 /* delay and try again */
7727                 msleep(CLEAR_EVENT_WAIT_INTERVAL);
7728         }
7729         return -ENODEV;
7730 done:
7731         return 0;
7732 }
7733
7734 static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
7735 {
7736         int i;
7737         u32 doorbell_value;
7738         unsigned long flags;
7739
7740         /* under certain very rare conditions, this can take awhile.
7741          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
7742          * as we enter this code.)
7743          */
7744         for (i = 0; i < MAX_MODE_CHANGE_WAIT; i++) {
7745                 if (h->remove_in_progress)
7746                         goto done;
7747                 spin_lock_irqsave(&h->lock, flags);
7748                 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
7749                 spin_unlock_irqrestore(&h->lock, flags);
7750                 if (!(doorbell_value & CFGTBL_ChangeReq))
7751                         goto done;
7752                 /* delay and try again */
7753                 msleep(MODE_CHANGE_WAIT_INTERVAL);
7754         }
7755         return -ENODEV;
7756 done:
7757         return 0;
7758 }
7759
7760 /* return -ENODEV or other reason on error, 0 on success */
7761 static int hpsa_enter_simple_mode(struct ctlr_info *h)
7762 {
7763         u32 trans_support;
7764
7765         trans_support = readl(&(h->cfgtable->TransportSupport));
7766         if (!(trans_support & SIMPLE_MODE))
7767                 return -ENOTSUPP;
7768
7769         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
7770
7771         /* Update the field, and then ring the doorbell */
7772         writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
7773         writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
7774         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
7775         if (hpsa_wait_for_mode_change_ack(h))
7776                 goto error;
7777         print_cfg_table(&h->pdev->dev, h->cfgtable);
7778         if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple))
7779                 goto error;
7780         h->transMethod = CFGTBL_Trans_Simple;
7781         return 0;
7782 error:
7783         dev_err(&h->pdev->dev, "failed to enter simple mode\n");
7784         return -ENODEV;
7785 }
7786
7787 /* free items allocated or mapped by hpsa_pci_init */
7788 static void hpsa_free_pci_init(struct ctlr_info *h)
7789 {
7790         hpsa_free_cfgtables(h);                 /* pci_init 4 */
7791         iounmap(h->vaddr);                      /* pci_init 3 */
7792         h->vaddr = NULL;
7793         hpsa_disable_interrupt_mode(h);         /* pci_init 2 */
7794         /*
7795          * call pci_disable_device before pci_release_regions per
7796          * Documentation/PCI/pci.txt
7797          */
7798         pci_disable_device(h->pdev);            /* pci_init 1 */
7799         pci_release_regions(h->pdev);           /* pci_init 2 */
7800 }
7801
7802 /* several items must be freed later */
7803 static int hpsa_pci_init(struct ctlr_info *h)
7804 {
7805         int prod_index, err;
7806         bool legacy_board;
7807
7808         prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id, &legacy_board);
7809         if (prod_index < 0)
7810                 return prod_index;
7811         h->product_name = products[prod_index].product_name;
7812         h->access = *(products[prod_index].access);
7813         h->legacy_board = legacy_board;
7814         pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
7815                                PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
7816
7817         err = pci_enable_device(h->pdev);
7818         if (err) {
7819                 dev_err(&h->pdev->dev, "failed to enable PCI device\n");
7820                 pci_disable_device(h->pdev);
7821                 return err;
7822         }
7823
7824         err = pci_request_regions(h->pdev, HPSA);
7825         if (err) {
7826                 dev_err(&h->pdev->dev,
7827                         "failed to obtain PCI resources\n");
7828                 pci_disable_device(h->pdev);
7829                 return err;
7830         }
7831
7832         pci_set_master(h->pdev);
7833
7834         err = hpsa_interrupt_mode(h);
7835         if (err)
7836                 goto clean1;
7837
7838         /* setup mapping between CPU and reply queue */
7839         hpsa_setup_reply_map(h);
7840
7841         err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
7842         if (err)
7843                 goto clean2;    /* intmode+region, pci */
7844         h->vaddr = remap_pci_mem(h->paddr, 0x250);
7845         if (!h->vaddr) {
7846                 dev_err(&h->pdev->dev, "failed to remap PCI mem\n");
7847                 err = -ENOMEM;
7848                 goto clean2;    /* intmode+region, pci */
7849         }
7850         err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
7851         if (err)
7852                 goto clean3;    /* vaddr, intmode+region, pci */
7853         err = hpsa_find_cfgtables(h);
7854         if (err)
7855                 goto clean3;    /* vaddr, intmode+region, pci */
7856         hpsa_find_board_params(h);
7857
7858         if (!hpsa_CISS_signature_present(h)) {
7859                 err = -ENODEV;
7860                 goto clean4;    /* cfgtables, vaddr, intmode+region, pci */
7861         }
7862         hpsa_set_driver_support_bits(h);
7863         hpsa_p600_dma_prefetch_quirk(h);
7864         err = hpsa_enter_simple_mode(h);
7865         if (err)
7866                 goto clean4;    /* cfgtables, vaddr, intmode+region, pci */
7867         return 0;
7868
7869 clean4: /* cfgtables, vaddr, intmode+region, pci */
7870         hpsa_free_cfgtables(h);
7871 clean3: /* vaddr, intmode+region, pci */
7872         iounmap(h->vaddr);
7873         h->vaddr = NULL;
7874 clean2: /* intmode+region, pci */
7875         hpsa_disable_interrupt_mode(h);
7876 clean1:
7877         /*
7878          * call pci_disable_device before pci_release_regions per
7879          * Documentation/PCI/pci.txt
7880          */
7881         pci_disable_device(h->pdev);
7882         pci_release_regions(h->pdev);
7883         return err;
7884 }
7885
7886 static void hpsa_hba_inquiry(struct ctlr_info *h)
7887 {
7888         int rc;
7889
7890 #define HBA_INQUIRY_BYTE_COUNT 64
7891         h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
7892         if (!h->hba_inquiry_data)
7893                 return;
7894         rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
7895                 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
7896         if (rc != 0) {
7897                 kfree(h->hba_inquiry_data);
7898                 h->hba_inquiry_data = NULL;
7899         }
7900 }
7901
7902 static int hpsa_init_reset_devices(struct pci_dev *pdev, u32 board_id)
7903 {
7904         int rc, i;
7905         void __iomem *vaddr;
7906
7907         if (!reset_devices)
7908                 return 0;
7909
7910         /* kdump kernel is loading, we don't know in which state is
7911          * the pci interface. The dev->enable_cnt is equal zero
7912          * so we call enable+disable, wait a while and switch it on.
7913          */
7914         rc = pci_enable_device(pdev);
7915         if (rc) {
7916                 dev_warn(&pdev->dev, "Failed to enable PCI device\n");
7917                 return -ENODEV;
7918         }
7919         pci_disable_device(pdev);
7920         msleep(260);                    /* a randomly chosen number */
7921         rc = pci_enable_device(pdev);
7922         if (rc) {
7923                 dev_warn(&pdev->dev, "failed to enable device.\n");
7924                 return -ENODEV;
7925         }
7926
7927         pci_set_master(pdev);
7928
7929         vaddr = pci_ioremap_bar(pdev, 0);
7930         if (vaddr == NULL) {
7931                 rc = -ENOMEM;
7932                 goto out_disable;
7933         }
7934         writel(SA5_INTR_OFF, vaddr + SA5_REPLY_INTR_MASK_OFFSET);
7935         iounmap(vaddr);
7936
7937         /* Reset the controller with a PCI power-cycle or via doorbell */
7938         rc = hpsa_kdump_hard_reset_controller(pdev, board_id);
7939
7940         /* -ENOTSUPP here means we cannot reset the controller
7941          * but it's already (and still) up and running in
7942          * "performant mode".  Or, it might be 640x, which can't reset
7943          * due to concerns about shared bbwc between 6402/6404 pair.
7944          */
7945         if (rc)
7946                 goto out_disable;
7947
7948         /* Now try to get the controller to respond to a no-op */
7949         dev_info(&pdev->dev, "Waiting for controller to respond to no-op\n");
7950         for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
7951                 if (hpsa_noop(pdev) == 0)
7952                         break;
7953                 else
7954                         dev_warn(&pdev->dev, "no-op failed%s\n",
7955                                         (i < 11 ? "; re-trying" : ""));
7956         }
7957
7958 out_disable:
7959
7960         pci_disable_device(pdev);
7961         return rc;
7962 }
7963
7964 static void hpsa_free_cmd_pool(struct ctlr_info *h)
7965 {
7966         kfree(h->cmd_pool_bits);
7967         h->cmd_pool_bits = NULL;
7968         if (h->cmd_pool) {
7969                 dma_free_coherent(&h->pdev->dev,
7970                                 h->nr_cmds * sizeof(struct CommandList),
7971                                 h->cmd_pool,
7972                                 h->cmd_pool_dhandle);
7973                 h->cmd_pool = NULL;
7974                 h->cmd_pool_dhandle = 0;
7975         }
7976         if (h->errinfo_pool) {
7977                 dma_free_coherent(&h->pdev->dev,
7978                                 h->nr_cmds * sizeof(struct ErrorInfo),
7979                                 h->errinfo_pool,
7980                                 h->errinfo_pool_dhandle);
7981                 h->errinfo_pool = NULL;
7982                 h->errinfo_pool_dhandle = 0;
7983         }
7984 }
7985
7986 static int hpsa_alloc_cmd_pool(struct ctlr_info *h)
7987 {
7988         h->cmd_pool_bits = kcalloc(DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG),
7989                                    sizeof(unsigned long),
7990                                    GFP_KERNEL);
7991         h->cmd_pool = dma_alloc_coherent(&h->pdev->dev,
7992                     h->nr_cmds * sizeof(*h->cmd_pool),
7993                     &h->cmd_pool_dhandle, GFP_KERNEL);
7994         h->errinfo_pool = dma_alloc_coherent(&h->pdev->dev,
7995                     h->nr_cmds * sizeof(*h->errinfo_pool),
7996                     &h->errinfo_pool_dhandle, GFP_KERNEL);
7997         if ((h->cmd_pool_bits == NULL)
7998             || (h->cmd_pool == NULL)
7999             || (h->errinfo_pool == NULL)) {
8000                 dev_err(&h->pdev->dev, "out of memory in %s", __func__);
8001                 goto clean_up;
8002         }
8003         hpsa_preinitialize_commands(h);
8004         return 0;
8005 clean_up:
8006         hpsa_free_cmd_pool(h);
8007         return -ENOMEM;
8008 }
8009
8010 /* clear affinity hints and free MSI-X, MSI, or legacy INTx vectors */
8011 static void hpsa_free_irqs(struct ctlr_info *h)
8012 {
8013         int i;
8014         int irq_vector = 0;
8015
8016         if (hpsa_simple_mode)
8017                 irq_vector = h->intr_mode;
8018
8019         if (!h->msix_vectors || h->intr_mode != PERF_MODE_INT) {
8020                 /* Single reply queue, only one irq to free */
8021                 free_irq(pci_irq_vector(h->pdev, irq_vector),
8022                                 &h->q[h->intr_mode]);
8023                 h->q[h->intr_mode] = 0;
8024                 return;
8025         }
8026
8027         for (i = 0; i < h->msix_vectors; i++) {
8028                 free_irq(pci_irq_vector(h->pdev, i), &h->q[i]);
8029                 h->q[i] = 0;
8030         }
8031         for (; i < MAX_REPLY_QUEUES; i++)
8032                 h->q[i] = 0;
8033 }
8034
8035 /* returns 0 on success; cleans up and returns -Enn on error */
8036 static int hpsa_request_irqs(struct ctlr_info *h,
8037         irqreturn_t (*msixhandler)(int, void *),
8038         irqreturn_t (*intxhandler)(int, void *))
8039 {
8040         int rc, i;
8041         int irq_vector = 0;
8042
8043         if (hpsa_simple_mode)
8044                 irq_vector = h->intr_mode;
8045
8046         /*
8047          * initialize h->q[x] = x so that interrupt handlers know which
8048          * queue to process.
8049          */
8050         for (i = 0; i < MAX_REPLY_QUEUES; i++)
8051                 h->q[i] = (u8) i;
8052
8053         if (h->intr_mode == PERF_MODE_INT && h->msix_vectors > 0) {
8054                 /* If performant mode and MSI-X, use multiple reply queues */
8055                 for (i = 0; i < h->msix_vectors; i++) {
8056                         sprintf(h->intrname[i], "%s-msix%d", h->devname, i);
8057                         rc = request_irq(pci_irq_vector(h->pdev, i), msixhandler,
8058                                         0, h->intrname[i],
8059                                         &h->q[i]);
8060                         if (rc) {
8061                                 int j;
8062
8063                                 dev_err(&h->pdev->dev,
8064                                         "failed to get irq %d for %s\n",
8065                                        pci_irq_vector(h->pdev, i), h->devname);
8066                                 for (j = 0; j < i; j++) {
8067                                         free_irq(pci_irq_vector(h->pdev, j), &h->q[j]);
8068                                         h->q[j] = 0;
8069                                 }
8070                                 for (; j < MAX_REPLY_QUEUES; j++)
8071                                         h->q[j] = 0;
8072                                 return rc;
8073                         }
8074                 }
8075         } else {
8076                 /* Use single reply pool */
8077                 if (h->msix_vectors > 0 || h->pdev->msi_enabled) {
8078                         sprintf(h->intrname[0], "%s-msi%s", h->devname,
8079                                 h->msix_vectors ? "x" : "");
8080                         rc = request_irq(pci_irq_vector(h->pdev, irq_vector),
8081                                 msixhandler, 0,
8082                                 h->intrname[0],
8083                                 &h->q[h->intr_mode]);
8084                 } else {
8085                         sprintf(h->intrname[h->intr_mode],
8086                                 "%s-intx", h->devname);
8087                         rc = request_irq(pci_irq_vector(h->pdev, irq_vector),
8088                                 intxhandler, IRQF_SHARED,
8089                                 h->intrname[0],
8090                                 &h->q[h->intr_mode]);
8091                 }
8092         }
8093         if (rc) {
8094                 dev_err(&h->pdev->dev, "failed to get irq %d for %s\n",
8095                        pci_irq_vector(h->pdev, irq_vector), h->devname);
8096                 hpsa_free_irqs(h);
8097                 return -ENODEV;
8098         }
8099         return 0;
8100 }
8101
8102 static int hpsa_kdump_soft_reset(struct ctlr_info *h)
8103 {
8104         int rc;
8105         hpsa_send_host_reset(h, HPSA_RESET_TYPE_CONTROLLER);
8106
8107         dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
8108         rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY);
8109         if (rc) {
8110                 dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
8111                 return rc;
8112         }
8113
8114         dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
8115         rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
8116         if (rc) {
8117                 dev_warn(&h->pdev->dev, "Board failed to become ready "
8118                         "after soft reset.\n");
8119                 return rc;
8120         }
8121
8122         return 0;
8123 }
8124
8125 static void hpsa_free_reply_queues(struct ctlr_info *h)
8126 {
8127         int i;
8128
8129         for (i = 0; i < h->nreply_queues; i++) {
8130                 if (!h->reply_queue[i].head)
8131                         continue;
8132                 dma_free_coherent(&h->pdev->dev,
8133                                         h->reply_queue_size,
8134                                         h->reply_queue[i].head,
8135                                         h->reply_queue[i].busaddr);
8136                 h->reply_queue[i].head = NULL;
8137                 h->reply_queue[i].busaddr = 0;
8138         }
8139         h->reply_queue_size = 0;
8140 }
8141
8142 static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
8143 {
8144         hpsa_free_performant_mode(h);           /* init_one 7 */
8145         hpsa_free_sg_chain_blocks(h);           /* init_one 6 */
8146         hpsa_free_cmd_pool(h);                  /* init_one 5 */
8147         hpsa_free_irqs(h);                      /* init_one 4 */
8148         scsi_host_put(h->scsi_host);            /* init_one 3 */
8149         h->scsi_host = NULL;                    /* init_one 3 */
8150         hpsa_free_pci_init(h);                  /* init_one 2_5 */
8151         free_percpu(h->lockup_detected);        /* init_one 2 */
8152         h->lockup_detected = NULL;              /* init_one 2 */
8153         if (h->resubmit_wq) {
8154                 destroy_workqueue(h->resubmit_wq);      /* init_one 1 */
8155                 h->resubmit_wq = NULL;
8156         }
8157         if (h->rescan_ctlr_wq) {
8158                 destroy_workqueue(h->rescan_ctlr_wq);
8159                 h->rescan_ctlr_wq = NULL;
8160         }
8161         if (h->monitor_ctlr_wq) {
8162                 destroy_workqueue(h->monitor_ctlr_wq);
8163                 h->monitor_ctlr_wq = NULL;
8164         }
8165
8166         kfree(h);                               /* init_one 1 */
8167 }
8168
8169 /* Called when controller lockup detected. */
8170 static void fail_all_outstanding_cmds(struct ctlr_info *h)
8171 {
8172         int i, refcount;
8173         struct CommandList *c;
8174         int failcount = 0;
8175
8176         flush_workqueue(h->resubmit_wq); /* ensure all cmds are fully built */
8177         for (i = 0; i < h->nr_cmds; i++) {
8178                 c = h->cmd_pool + i;
8179                 refcount = atomic_inc_return(&c->refcount);
8180                 if (refcount > 1) {
8181                         c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
8182                         finish_cmd(c);
8183                         atomic_dec(&h->commands_outstanding);
8184                         failcount++;
8185                 }
8186                 cmd_free(h, c);
8187         }
8188         dev_warn(&h->pdev->dev,
8189                 "failed %d commands in fail_all\n", failcount);
8190 }
8191
8192 static void set_lockup_detected_for_all_cpus(struct ctlr_info *h, u32 value)
8193 {
8194         int cpu;
8195
8196         for_each_online_cpu(cpu) {
8197                 u32 *lockup_detected;
8198                 lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
8199                 *lockup_detected = value;
8200         }
8201         wmb(); /* be sure the per-cpu variables are out to memory */
8202 }
8203
8204 static void controller_lockup_detected(struct ctlr_info *h)
8205 {
8206         unsigned long flags;
8207         u32 lockup_detected;
8208
8209         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8210         spin_lock_irqsave(&h->lock, flags);
8211         lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
8212         if (!lockup_detected) {
8213                 /* no heartbeat, but controller gave us a zero. */
8214                 dev_warn(&h->pdev->dev,
8215                         "lockup detected after %d but scratchpad register is zero\n",
8216                         h->heartbeat_sample_interval / HZ);
8217                 lockup_detected = 0xffffffff;
8218         }
8219         set_lockup_detected_for_all_cpus(h, lockup_detected);
8220         spin_unlock_irqrestore(&h->lock, flags);
8221         dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x after %d\n",
8222                         lockup_detected, h->heartbeat_sample_interval / HZ);
8223         if (lockup_detected == 0xffff0000) {
8224                 dev_warn(&h->pdev->dev, "Telling controller to do a CHKPT\n");
8225                 writel(DOORBELL_GENERATE_CHKPT, h->vaddr + SA5_DOORBELL);
8226         }
8227         pci_disable_device(h->pdev);
8228         fail_all_outstanding_cmds(h);
8229 }
8230
8231 static int detect_controller_lockup(struct ctlr_info *h)
8232 {
8233         u64 now;
8234         u32 heartbeat;
8235         unsigned long flags;
8236
8237         now = get_jiffies_64();
8238         /* If we've received an interrupt recently, we're ok. */
8239         if (time_after64(h->last_intr_timestamp +
8240                                 (h->heartbeat_sample_interval), now))
8241                 return false;
8242
8243         /*
8244          * If we've already checked the heartbeat recently, we're ok.
8245          * This could happen if someone sends us a signal. We
8246          * otherwise don't care about signals in this thread.
8247          */
8248         if (time_after64(h->last_heartbeat_timestamp +
8249                                 (h->heartbeat_sample_interval), now))
8250                 return false;
8251
8252         /* If heartbeat has not changed since we last looked, we're not ok. */
8253         spin_lock_irqsave(&h->lock, flags);
8254         heartbeat = readl(&h->cfgtable->HeartBeat);
8255         spin_unlock_irqrestore(&h->lock, flags);
8256         if (h->last_heartbeat == heartbeat) {
8257                 controller_lockup_detected(h);
8258                 return true;
8259         }
8260
8261         /* We're ok. */
8262         h->last_heartbeat = heartbeat;
8263         h->last_heartbeat_timestamp = now;
8264         return false;
8265 }
8266
8267 /*
8268  * Set ioaccel status for all ioaccel volumes.
8269  *
8270  * Called from monitor controller worker (hpsa_event_monitor_worker)
8271  *
8272  * A Volume (or Volumes that comprise an Array set may be undergoing a
8273  * transformation, so we will be turning off ioaccel for all volumes that
8274  * make up the Array.
8275  */
8276 static void hpsa_set_ioaccel_status(struct ctlr_info *h)
8277 {
8278         int rc;
8279         int i;
8280         u8 ioaccel_status;
8281         unsigned char *buf;
8282         struct hpsa_scsi_dev_t *device;
8283
8284         if (!h)
8285                 return;
8286
8287         buf = kmalloc(64, GFP_KERNEL);
8288         if (!buf)
8289                 return;
8290
8291         /*
8292          * Run through current device list used during I/O requests.
8293          */
8294         for (i = 0; i < h->ndevices; i++) {
8295                 device = h->dev[i];
8296
8297                 if (!device)
8298                         continue;
8299                 if (!hpsa_vpd_page_supported(h, device->scsi3addr,
8300                                                 HPSA_VPD_LV_IOACCEL_STATUS))
8301                         continue;
8302
8303                 memset(buf, 0, 64);
8304
8305                 rc = hpsa_scsi_do_inquiry(h, device->scsi3addr,
8306                                         VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS,
8307                                         buf, 64);
8308                 if (rc != 0)
8309                         continue;
8310
8311                 ioaccel_status = buf[IOACCEL_STATUS_BYTE];
8312                 device->offload_config =
8313                                 !!(ioaccel_status & OFFLOAD_CONFIGURED_BIT);
8314                 if (device->offload_config)
8315                         device->offload_to_be_enabled =
8316                                 !!(ioaccel_status & OFFLOAD_ENABLED_BIT);
8317
8318                 /*
8319                  * Immediately turn off ioaccel for any volume the
8320                  * controller tells us to. Some of the reasons could be:
8321                  *    transformation - change to the LVs of an Array.
8322                  *    degraded volume - component failure
8323                  *
8324                  * If ioaccel is to be re-enabled, re-enable later during the
8325                  * scan operation so the driver can get a fresh raidmap
8326                  * before turning ioaccel back on.
8327                  *
8328                  */
8329                 if (!device->offload_to_be_enabled)
8330                         device->offload_enabled = 0;
8331         }
8332
8333         kfree(buf);
8334 }
8335
8336 static void hpsa_ack_ctlr_events(struct ctlr_info *h)
8337 {
8338         char *event_type;
8339
8340         if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
8341                 return;
8342
8343         /* Ask the controller to clear the events we're handling. */
8344         if ((h->transMethod & (CFGTBL_Trans_io_accel1
8345                         | CFGTBL_Trans_io_accel2)) &&
8346                 (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE ||
8347                  h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)) {
8348
8349                 if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE)
8350                         event_type = "state change";
8351                 if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)
8352                         event_type = "configuration change";
8353                 /* Stop sending new RAID offload reqs via the IO accelerator */
8354                 scsi_block_requests(h->scsi_host);
8355                 hpsa_set_ioaccel_status(h);
8356                 hpsa_drain_accel_commands(h);
8357                 /* Set 'accelerator path config change' bit */
8358                 dev_warn(&h->pdev->dev,
8359                         "Acknowledging event: 0x%08x (HP SSD Smart Path %s)\n",
8360                         h->events, event_type);
8361                 writel(h->events, &(h->cfgtable->clear_event_notify));
8362                 /* Set the "clear event notify field update" bit 6 */
8363                 writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
8364                 /* Wait until ctlr clears 'clear event notify field', bit 6 */
8365                 hpsa_wait_for_clear_event_notify_ack(h);
8366                 scsi_unblock_requests(h->scsi_host);
8367         } else {
8368                 /* Acknowledge controller notification events. */
8369                 writel(h->events, &(h->cfgtable->clear_event_notify));
8370                 writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
8371                 hpsa_wait_for_clear_event_notify_ack(h);
8372         }
8373         return;
8374 }
8375
8376 /* Check a register on the controller to see if there are configuration
8377  * changes (added/changed/removed logical drives, etc.) which mean that
8378  * we should rescan the controller for devices.
8379  * Also check flag for driver-initiated rescan.
8380  */
8381 static int hpsa_ctlr_needs_rescan(struct ctlr_info *h)
8382 {
8383         if (h->drv_req_rescan) {
8384                 h->drv_req_rescan = 0;
8385                 return 1;
8386         }
8387
8388         if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
8389                 return 0;
8390
8391         h->events = readl(&(h->cfgtable->event_notify));
8392         return h->events & RESCAN_REQUIRED_EVENT_BITS;
8393 }
8394
8395 /*
8396  * Check if any of the offline devices have become ready
8397  */
8398 static int hpsa_offline_devices_ready(struct ctlr_info *h)
8399 {
8400         unsigned long flags;
8401         struct offline_device_entry *d;
8402         struct list_head *this, *tmp;
8403
8404         spin_lock_irqsave(&h->offline_device_lock, flags);
8405         list_for_each_safe(this, tmp, &h->offline_device_list) {
8406                 d = list_entry(this, struct offline_device_entry,
8407                                 offline_list);
8408                 spin_unlock_irqrestore(&h->offline_device_lock, flags);
8409                 if (!hpsa_volume_offline(h, d->scsi3addr)) {
8410                         spin_lock_irqsave(&h->offline_device_lock, flags);
8411                         list_del(&d->offline_list);
8412                         spin_unlock_irqrestore(&h->offline_device_lock, flags);
8413                         return 1;
8414                 }
8415                 spin_lock_irqsave(&h->offline_device_lock, flags);
8416         }
8417         spin_unlock_irqrestore(&h->offline_device_lock, flags);
8418         return 0;
8419 }
8420
8421 static int hpsa_luns_changed(struct ctlr_info *h)
8422 {
8423         int rc = 1; /* assume there are changes */
8424         struct ReportLUNdata *logdev = NULL;
8425
8426         /* if we can't find out if lun data has changed,
8427          * assume that it has.
8428          */
8429
8430         if (!h->lastlogicals)
8431                 return rc;
8432
8433         logdev = kzalloc(sizeof(*logdev), GFP_KERNEL);
8434         if (!logdev)
8435                 return rc;
8436
8437         if (hpsa_scsi_do_report_luns(h, 1, logdev, sizeof(*logdev), 0)) {
8438                 dev_warn(&h->pdev->dev,
8439                         "report luns failed, can't track lun changes.\n");
8440                 goto out;
8441         }
8442         if (memcmp(logdev, h->lastlogicals, sizeof(*logdev))) {
8443                 dev_info(&h->pdev->dev,
8444                         "Lun changes detected.\n");
8445                 memcpy(h->lastlogicals, logdev, sizeof(*logdev));
8446                 goto out;
8447         } else
8448                 rc = 0; /* no changes detected. */
8449 out:
8450         kfree(logdev);
8451         return rc;
8452 }
8453
8454 static void hpsa_perform_rescan(struct ctlr_info *h)
8455 {
8456         struct Scsi_Host *sh = NULL;
8457         unsigned long flags;
8458
8459         /*
8460          * Do the scan after the reset
8461          */
8462         spin_lock_irqsave(&h->reset_lock, flags);
8463         if (h->reset_in_progress) {
8464                 h->drv_req_rescan = 1;
8465                 spin_unlock_irqrestore(&h->reset_lock, flags);
8466                 return;
8467         }
8468         spin_unlock_irqrestore(&h->reset_lock, flags);
8469
8470         sh = scsi_host_get(h->scsi_host);
8471         if (sh != NULL) {
8472                 hpsa_scan_start(sh);
8473                 scsi_host_put(sh);
8474                 h->drv_req_rescan = 0;
8475         }
8476 }
8477
8478 /*
8479  * watch for controller events
8480  */
8481 static void hpsa_event_monitor_worker(struct work_struct *work)
8482 {
8483         struct ctlr_info *h = container_of(to_delayed_work(work),
8484                                         struct ctlr_info, event_monitor_work);
8485         unsigned long flags;
8486
8487         spin_lock_irqsave(&h->lock, flags);
8488         if (h->remove_in_progress) {
8489                 spin_unlock_irqrestore(&h->lock, flags);
8490                 return;
8491         }
8492         spin_unlock_irqrestore(&h->lock, flags);
8493
8494         if (hpsa_ctlr_needs_rescan(h)) {
8495                 hpsa_ack_ctlr_events(h);
8496                 hpsa_perform_rescan(h);
8497         }
8498
8499         spin_lock_irqsave(&h->lock, flags);
8500         if (!h->remove_in_progress)
8501                 queue_delayed_work(h->monitor_ctlr_wq, &h->event_monitor_work,
8502                                 HPSA_EVENT_MONITOR_INTERVAL);
8503         spin_unlock_irqrestore(&h->lock, flags);
8504 }
8505
8506 static void hpsa_rescan_ctlr_worker(struct work_struct *work)
8507 {
8508         unsigned long flags;
8509         struct ctlr_info *h = container_of(to_delayed_work(work),
8510                                         struct ctlr_info, rescan_ctlr_work);
8511
8512         spin_lock_irqsave(&h->lock, flags);
8513         if (h->remove_in_progress) {
8514                 spin_unlock_irqrestore(&h->lock, flags);
8515                 return;
8516         }
8517         spin_unlock_irqrestore(&h->lock, flags);
8518
8519         if (h->drv_req_rescan || hpsa_offline_devices_ready(h)) {
8520                 hpsa_perform_rescan(h);
8521         } else if (h->discovery_polling) {
8522                 if (hpsa_luns_changed(h)) {
8523                         dev_info(&h->pdev->dev,
8524                                 "driver discovery polling rescan.\n");
8525                         hpsa_perform_rescan(h);
8526                 }
8527         }
8528         spin_lock_irqsave(&h->lock, flags);
8529         if (!h->remove_in_progress)
8530                 queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
8531                                 h->heartbeat_sample_interval);
8532         spin_unlock_irqrestore(&h->lock, flags);
8533 }
8534
8535 static void hpsa_monitor_ctlr_worker(struct work_struct *work)
8536 {
8537         unsigned long flags;
8538         struct ctlr_info *h = container_of(to_delayed_work(work),
8539                                         struct ctlr_info, monitor_ctlr_work);
8540
8541         detect_controller_lockup(h);
8542         if (lockup_detected(h))
8543                 return;
8544
8545         spin_lock_irqsave(&h->lock, flags);
8546         if (!h->remove_in_progress)
8547                 queue_delayed_work(h->monitor_ctlr_wq, &h->monitor_ctlr_work,
8548                                 h->heartbeat_sample_interval);
8549         spin_unlock_irqrestore(&h->lock, flags);
8550 }
8551
8552 static struct workqueue_struct *hpsa_create_controller_wq(struct ctlr_info *h,
8553                                                 char *name)
8554 {
8555         struct workqueue_struct *wq = NULL;
8556
8557         wq = alloc_ordered_workqueue("%s_%d_hpsa", 0, name, h->ctlr);
8558         if (!wq)
8559                 dev_err(&h->pdev->dev, "failed to create %s workqueue\n", name);
8560
8561         return wq;
8562 }
8563
8564 static void hpda_free_ctlr_info(struct ctlr_info *h)
8565 {
8566         kfree(h->reply_map);
8567         kfree(h);
8568 }
8569
8570 static struct ctlr_info *hpda_alloc_ctlr_info(void)
8571 {
8572         struct ctlr_info *h;
8573
8574         h = kzalloc(sizeof(*h), GFP_KERNEL);
8575         if (!h)
8576                 return NULL;
8577
8578         h->reply_map = kcalloc(nr_cpu_ids, sizeof(*h->reply_map), GFP_KERNEL);
8579         if (!h->reply_map) {
8580                 kfree(h);
8581                 return NULL;
8582         }
8583         return h;
8584 }
8585
8586 static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
8587 {
8588         int dac, rc;
8589         struct ctlr_info *h;
8590         int try_soft_reset = 0;
8591         unsigned long flags;
8592         u32 board_id;
8593
8594         if (number_of_controllers == 0)
8595                 printk(KERN_INFO DRIVER_NAME "\n");
8596
8597         rc = hpsa_lookup_board_id(pdev, &board_id, NULL);
8598         if (rc < 0) {
8599                 dev_warn(&pdev->dev, "Board ID not found\n");
8600                 return rc;
8601         }
8602
8603         rc = hpsa_init_reset_devices(pdev, board_id);
8604         if (rc) {
8605                 if (rc != -ENOTSUPP)
8606                         return rc;
8607                 /* If the reset fails in a particular way (it has no way to do
8608                  * a proper hard reset, so returns -ENOTSUPP) we can try to do
8609                  * a soft reset once we get the controller configured up to the
8610                  * point that it can accept a command.
8611                  */
8612                 try_soft_reset = 1;
8613                 rc = 0;
8614         }
8615
8616 reinit_after_soft_reset:
8617
8618         /* Command structures must be aligned on a 32-byte boundary because
8619          * the 5 lower bits of the address are used by the hardware. and by
8620          * the driver.  See comments in hpsa.h for more info.
8621          */
8622         BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
8623         h = hpda_alloc_ctlr_info();
8624         if (!h) {
8625                 dev_err(&pdev->dev, "Failed to allocate controller head\n");
8626                 return -ENOMEM;
8627         }
8628
8629         h->pdev = pdev;
8630
8631         h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
8632         INIT_LIST_HEAD(&h->offline_device_list);
8633         spin_lock_init(&h->lock);
8634         spin_lock_init(&h->offline_device_lock);
8635         spin_lock_init(&h->scan_lock);
8636         spin_lock_init(&h->reset_lock);
8637         atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
8638
8639         /* Allocate and clear per-cpu variable lockup_detected */
8640         h->lockup_detected = alloc_percpu(u32);
8641         if (!h->lockup_detected) {
8642                 dev_err(&h->pdev->dev, "Failed to allocate lockup detector\n");
8643                 rc = -ENOMEM;
8644                 goto clean1;    /* aer/h */
8645         }
8646         set_lockup_detected_for_all_cpus(h, 0);
8647
8648         rc = hpsa_pci_init(h);
8649         if (rc)
8650                 goto clean2;    /* lu, aer/h */
8651
8652         /* relies on h-> settings made by hpsa_pci_init, including
8653          * interrupt_mode h->intr */
8654         rc = hpsa_scsi_host_alloc(h);
8655         if (rc)
8656                 goto clean2_5;  /* pci, lu, aer/h */
8657
8658         sprintf(h->devname, HPSA "%d", h->scsi_host->host_no);
8659         h->ctlr = number_of_controllers;
8660         number_of_controllers++;
8661
8662         /* configure PCI DMA stuff */
8663         rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
8664         if (rc == 0) {
8665                 dac = 1;
8666         } else {
8667                 rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
8668                 if (rc == 0) {
8669                         dac = 0;
8670                 } else {
8671                         dev_err(&pdev->dev, "no suitable DMA available\n");
8672                         goto clean3;    /* shost, pci, lu, aer/h */
8673                 }
8674         }
8675
8676         /* make sure the board interrupts are off */
8677         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8678
8679         rc = hpsa_request_irqs(h, do_hpsa_intr_msi, do_hpsa_intr_intx);
8680         if (rc)
8681                 goto clean3;    /* shost, pci, lu, aer/h */
8682         rc = hpsa_alloc_cmd_pool(h);
8683         if (rc)
8684                 goto clean4;    /* irq, shost, pci, lu, aer/h */
8685         rc = hpsa_alloc_sg_chain_blocks(h);
8686         if (rc)
8687                 goto clean5;    /* cmd, irq, shost, pci, lu, aer/h */
8688         init_waitqueue_head(&h->scan_wait_queue);
8689         init_waitqueue_head(&h->event_sync_wait_queue);
8690         mutex_init(&h->reset_mutex);
8691         h->scan_finished = 1; /* no scan currently in progress */
8692         h->scan_waiting = 0;
8693
8694         pci_set_drvdata(pdev, h);
8695         h->ndevices = 0;
8696
8697         spin_lock_init(&h->devlock);
8698         rc = hpsa_put_ctlr_into_performant_mode(h);
8699         if (rc)
8700                 goto clean6; /* sg, cmd, irq, shost, pci, lu, aer/h */
8701
8702         /* create the resubmit workqueue */
8703         h->rescan_ctlr_wq = hpsa_create_controller_wq(h, "rescan");
8704         if (!h->rescan_ctlr_wq) {
8705                 rc = -ENOMEM;
8706                 goto clean7;
8707         }
8708
8709         h->resubmit_wq = hpsa_create_controller_wq(h, "resubmit");
8710         if (!h->resubmit_wq) {
8711                 rc = -ENOMEM;
8712                 goto clean7;    /* aer/h */
8713         }
8714
8715         h->monitor_ctlr_wq = hpsa_create_controller_wq(h, "monitor");
8716         if (!h->monitor_ctlr_wq) {
8717                 rc = -ENOMEM;
8718                 goto clean7;
8719         }
8720
8721         /*
8722          * At this point, the controller is ready to take commands.
8723          * Now, if reset_devices and the hard reset didn't work, try
8724          * the soft reset and see if that works.
8725          */
8726         if (try_soft_reset) {
8727
8728                 /* This is kind of gross.  We may or may not get a completion
8729                  * from the soft reset command, and if we do, then the value
8730                  * from the fifo may or may not be valid.  So, we wait 10 secs
8731                  * after the reset throwing away any completions we get during
8732                  * that time.  Unregister the interrupt handler and register
8733                  * fake ones to scoop up any residual completions.
8734                  */
8735                 spin_lock_irqsave(&h->lock, flags);
8736                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
8737                 spin_unlock_irqrestore(&h->lock, flags);
8738                 hpsa_free_irqs(h);
8739                 rc = hpsa_request_irqs(h, hpsa_msix_discard_completions,
8740                                         hpsa_intx_discard_completions);
8741                 if (rc) {
8742                         dev_warn(&h->pdev->dev,
8743                                 "Failed to request_irq after soft reset.\n");
8744                         /*
8745                          * cannot goto clean7 or free_irqs will be called
8746                          * again. Instead, do its work
8747                          */
8748                         hpsa_free_performant_mode(h);   /* clean7 */
8749                         hpsa_free_sg_chain_blocks(h);   /* clean6 */
8750                         hpsa_free_cmd_pool(h);          /* clean5 */
8751                         /*
8752                          * skip hpsa_free_irqs(h) clean4 since that
8753                          * was just called before request_irqs failed
8754                          */
8755                         goto clean3;
8756                 }
8757
8758                 rc = hpsa_kdump_soft_reset(h);
8759                 if (rc)
8760                         /* Neither hard nor soft reset worked, we're hosed. */
8761                         goto clean7;
8762
8763                 dev_info(&h->pdev->dev, "Board READY.\n");
8764                 dev_info(&h->pdev->dev,
8765                         "Waiting for stale completions to drain.\n");
8766                 h->access.set_intr_mask(h, HPSA_INTR_ON);
8767                 msleep(10000);
8768                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
8769
8770                 rc = controller_reset_failed(h->cfgtable);
8771                 if (rc)
8772                         dev_info(&h->pdev->dev,
8773                                 "Soft reset appears to have failed.\n");
8774
8775                 /* since the controller's reset, we have to go back and re-init
8776                  * everything.  Easiest to just forget what we've done and do it
8777                  * all over again.
8778                  */
8779                 hpsa_undo_allocations_after_kdump_soft_reset(h);
8780                 try_soft_reset = 0;
8781                 if (rc)
8782                         /* don't goto clean, we already unallocated */
8783                         return -ENODEV;
8784
8785                 goto reinit_after_soft_reset;
8786         }
8787
8788         /* Enable Accelerated IO path at driver layer */
8789         h->acciopath_status = 1;
8790         /* Disable discovery polling.*/
8791         h->discovery_polling = 0;
8792
8793
8794         /* Turn the interrupts on so we can service requests */
8795         h->access.set_intr_mask(h, HPSA_INTR_ON);
8796
8797         hpsa_hba_inquiry(h);
8798
8799         h->lastlogicals = kzalloc(sizeof(*(h->lastlogicals)), GFP_KERNEL);
8800         if (!h->lastlogicals)
8801                 dev_info(&h->pdev->dev,
8802                         "Can't track change to report lun data\n");
8803
8804         /* hook into SCSI subsystem */
8805         rc = hpsa_scsi_add_host(h);
8806         if (rc)
8807                 goto clean7; /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
8808
8809         /* Monitor the controller for firmware lockups */
8810         h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
8811         INIT_DELAYED_WORK(&h->monitor_ctlr_work, hpsa_monitor_ctlr_worker);
8812         schedule_delayed_work(&h->monitor_ctlr_work,
8813                                 h->heartbeat_sample_interval);
8814         INIT_DELAYED_WORK(&h->rescan_ctlr_work, hpsa_rescan_ctlr_worker);
8815         queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
8816                                 h->heartbeat_sample_interval);
8817         INIT_DELAYED_WORK(&h->event_monitor_work, hpsa_event_monitor_worker);
8818         schedule_delayed_work(&h->event_monitor_work,
8819                                 HPSA_EVENT_MONITOR_INTERVAL);
8820         return 0;
8821
8822 clean7: /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
8823         hpsa_free_performant_mode(h);
8824         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8825 clean6: /* sg, cmd, irq, pci, lockup, wq/aer/h */
8826         hpsa_free_sg_chain_blocks(h);
8827 clean5: /* cmd, irq, shost, pci, lu, aer/h */
8828         hpsa_free_cmd_pool(h);
8829 clean4: /* irq, shost, pci, lu, aer/h */
8830         hpsa_free_irqs(h);
8831 clean3: /* shost, pci, lu, aer/h */
8832         scsi_host_put(h->scsi_host);
8833         h->scsi_host = NULL;
8834 clean2_5: /* pci, lu, aer/h */
8835         hpsa_free_pci_init(h);
8836 clean2: /* lu, aer/h */
8837         if (h->lockup_detected) {
8838                 free_percpu(h->lockup_detected);
8839                 h->lockup_detected = NULL;
8840         }
8841 clean1: /* wq/aer/h */
8842         if (h->resubmit_wq) {
8843                 destroy_workqueue(h->resubmit_wq);
8844                 h->resubmit_wq = NULL;
8845         }
8846         if (h->rescan_ctlr_wq) {
8847                 destroy_workqueue(h->rescan_ctlr_wq);
8848                 h->rescan_ctlr_wq = NULL;
8849         }
8850         if (h->monitor_ctlr_wq) {
8851                 destroy_workqueue(h->monitor_ctlr_wq);
8852                 h->monitor_ctlr_wq = NULL;
8853         }
8854         kfree(h);
8855         return rc;
8856 }
8857
8858 static void hpsa_flush_cache(struct ctlr_info *h)
8859 {
8860         char *flush_buf;
8861         struct CommandList *c;
8862         int rc;
8863
8864         if (unlikely(lockup_detected(h)))
8865                 return;
8866         flush_buf = kzalloc(4, GFP_KERNEL);
8867         if (!flush_buf)
8868                 return;
8869
8870         c = cmd_alloc(h);
8871
8872         if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
8873                 RAID_CTLR_LUNID, TYPE_CMD)) {
8874                 goto out;
8875         }
8876         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_TO_DEVICE,
8877                         DEFAULT_TIMEOUT);
8878         if (rc)
8879                 goto out;
8880         if (c->err_info->CommandStatus != 0)
8881 out:
8882                 dev_warn(&h->pdev->dev,
8883                         "error flushing cache on controller\n");
8884         cmd_free(h, c);
8885         kfree(flush_buf);
8886 }
8887
8888 /* Make controller gather fresh report lun data each time we
8889  * send down a report luns request
8890  */
8891 static void hpsa_disable_rld_caching(struct ctlr_info *h)
8892 {
8893         u32 *options;
8894         struct CommandList *c;
8895         int rc;
8896
8897         /* Don't bother trying to set diag options if locked up */
8898         if (unlikely(h->lockup_detected))
8899                 return;
8900
8901         options = kzalloc(sizeof(*options), GFP_KERNEL);
8902         if (!options)
8903                 return;
8904
8905         c = cmd_alloc(h);
8906
8907         /* first, get the current diag options settings */
8908         if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
8909                 RAID_CTLR_LUNID, TYPE_CMD))
8910                 goto errout;
8911
8912         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
8913                         NO_TIMEOUT);
8914         if ((rc != 0) || (c->err_info->CommandStatus != 0))
8915                 goto errout;
8916
8917         /* Now, set the bit for disabling the RLD caching */
8918         *options |= HPSA_DIAG_OPTS_DISABLE_RLD_CACHING;
8919
8920         if (fill_cmd(c, BMIC_SET_DIAG_OPTIONS, h, options, 4, 0,
8921                 RAID_CTLR_LUNID, TYPE_CMD))
8922                 goto errout;
8923
8924         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_TO_DEVICE,
8925                         NO_TIMEOUT);
8926         if ((rc != 0)  || (c->err_info->CommandStatus != 0))
8927                 goto errout;
8928
8929         /* Now verify that it got set: */
8930         if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
8931                 RAID_CTLR_LUNID, TYPE_CMD))
8932                 goto errout;
8933
8934         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
8935                         NO_TIMEOUT);
8936         if ((rc != 0)  || (c->err_info->CommandStatus != 0))
8937                 goto errout;
8938
8939         if (*options & HPSA_DIAG_OPTS_DISABLE_RLD_CACHING)
8940                 goto out;
8941
8942 errout:
8943         dev_err(&h->pdev->dev,
8944                         "Error: failed to disable report lun data caching.\n");
8945 out:
8946         cmd_free(h, c);
8947         kfree(options);
8948 }
8949
8950 static void __hpsa_shutdown(struct pci_dev *pdev)
8951 {
8952         struct ctlr_info *h;
8953
8954         h = pci_get_drvdata(pdev);
8955         /* Turn board interrupts off  and send the flush cache command
8956          * sendcmd will turn off interrupt, and send the flush...
8957          * To write all data in the battery backed cache to disks
8958          */
8959         hpsa_flush_cache(h);
8960         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8961         hpsa_free_irqs(h);                      /* init_one 4 */
8962         hpsa_disable_interrupt_mode(h);         /* pci_init 2 */
8963 }
8964
8965 static void hpsa_shutdown(struct pci_dev *pdev)
8966 {
8967         __hpsa_shutdown(pdev);
8968         pci_disable_device(pdev);
8969 }
8970
8971 static void hpsa_free_device_info(struct ctlr_info *h)
8972 {
8973         int i;
8974
8975         for (i = 0; i < h->ndevices; i++) {
8976                 kfree(h->dev[i]);
8977                 h->dev[i] = NULL;
8978         }
8979 }
8980
8981 static void hpsa_remove_one(struct pci_dev *pdev)
8982 {
8983         struct ctlr_info *h;
8984         unsigned long flags;
8985
8986         if (pci_get_drvdata(pdev) == NULL) {
8987                 dev_err(&pdev->dev, "unable to remove device\n");
8988                 return;
8989         }
8990         h = pci_get_drvdata(pdev);
8991
8992         /* Get rid of any controller monitoring work items */
8993         spin_lock_irqsave(&h->lock, flags);
8994         h->remove_in_progress = 1;
8995         spin_unlock_irqrestore(&h->lock, flags);
8996         cancel_delayed_work_sync(&h->monitor_ctlr_work);
8997         cancel_delayed_work_sync(&h->rescan_ctlr_work);
8998         cancel_delayed_work_sync(&h->event_monitor_work);
8999         destroy_workqueue(h->rescan_ctlr_wq);
9000         destroy_workqueue(h->resubmit_wq);
9001         destroy_workqueue(h->monitor_ctlr_wq);
9002
9003         hpsa_delete_sas_host(h);
9004
9005         /*
9006          * Call before disabling interrupts.
9007          * scsi_remove_host can trigger I/O operations especially
9008          * when multipath is enabled. There can be SYNCHRONIZE CACHE
9009          * operations which cannot complete and will hang the system.
9010          */
9011         if (h->scsi_host)
9012                 scsi_remove_host(h->scsi_host);         /* init_one 8 */
9013         /* includes hpsa_free_irqs - init_one 4 */
9014         /* includes hpsa_disable_interrupt_mode - pci_init 2 */
9015         __hpsa_shutdown(pdev);
9016
9017         hpsa_free_device_info(h);               /* scan */
9018
9019         kfree(h->hba_inquiry_data);                     /* init_one 10 */
9020         h->hba_inquiry_data = NULL;                     /* init_one 10 */
9021         hpsa_free_ioaccel2_sg_chain_blocks(h);
9022         hpsa_free_performant_mode(h);                   /* init_one 7 */
9023         hpsa_free_sg_chain_blocks(h);                   /* init_one 6 */
9024         hpsa_free_cmd_pool(h);                          /* init_one 5 */
9025         kfree(h->lastlogicals);
9026
9027         /* hpsa_free_irqs already called via hpsa_shutdown init_one 4 */
9028
9029         scsi_host_put(h->scsi_host);                    /* init_one 3 */
9030         h->scsi_host = NULL;                            /* init_one 3 */
9031
9032         /* includes hpsa_disable_interrupt_mode - pci_init 2 */
9033         hpsa_free_pci_init(h);                          /* init_one 2.5 */
9034
9035         free_percpu(h->lockup_detected);                /* init_one 2 */
9036         h->lockup_detected = NULL;                      /* init_one 2 */
9037         /* (void) pci_disable_pcie_error_reporting(pdev); */    /* init_one 1 */
9038
9039         hpda_free_ctlr_info(h);                         /* init_one 1 */
9040 }
9041
9042 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
9043         __attribute__((unused)) pm_message_t state)
9044 {
9045         return -ENOSYS;
9046 }
9047
9048 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
9049 {
9050         return -ENOSYS;
9051 }
9052
9053 static struct pci_driver hpsa_pci_driver = {
9054         .name = HPSA,
9055         .probe = hpsa_init_one,
9056         .remove = hpsa_remove_one,
9057         .id_table = hpsa_pci_device_id, /* id_table */
9058         .shutdown = hpsa_shutdown,
9059         .suspend = hpsa_suspend,
9060         .resume = hpsa_resume,
9061 };
9062
9063 /* Fill in bucket_map[], given nsgs (the max number of
9064  * scatter gather elements supported) and bucket[],
9065  * which is an array of 8 integers.  The bucket[] array
9066  * contains 8 different DMA transfer sizes (in 16
9067  * byte increments) which the controller uses to fetch
9068  * commands.  This function fills in bucket_map[], which
9069  * maps a given number of scatter gather elements to one of
9070  * the 8 DMA transfer sizes.  The point of it is to allow the
9071  * controller to only do as much DMA as needed to fetch the
9072  * command, with the DMA transfer size encoded in the lower
9073  * bits of the command address.
9074  */
9075 static void  calc_bucket_map(int bucket[], int num_buckets,
9076         int nsgs, int min_blocks, u32 *bucket_map)
9077 {
9078         int i, j, b, size;
9079
9080         /* Note, bucket_map must have nsgs+1 entries. */
9081         for (i = 0; i <= nsgs; i++) {
9082                 /* Compute size of a command with i SG entries */
9083                 size = i + min_blocks;
9084                 b = num_buckets; /* Assume the biggest bucket */
9085                 /* Find the bucket that is just big enough */
9086                 for (j = 0; j < num_buckets; j++) {
9087                         if (bucket[j] >= size) {
9088                                 b = j;
9089                                 break;
9090                         }
9091                 }
9092                 /* for a command with i SG entries, use bucket b. */
9093                 bucket_map[i] = b;
9094         }
9095 }
9096
9097 /*
9098  * return -ENODEV on err, 0 on success (or no action)
9099  * allocates numerous items that must be freed later
9100  */
9101 static int hpsa_enter_performant_mode(struct ctlr_info *h, u32 trans_support)
9102 {
9103         int i;
9104         unsigned long register_value;
9105         unsigned long transMethod = CFGTBL_Trans_Performant |
9106                         (trans_support & CFGTBL_Trans_use_short_tags) |
9107                                 CFGTBL_Trans_enable_directed_msix |
9108                         (trans_support & (CFGTBL_Trans_io_accel1 |
9109                                 CFGTBL_Trans_io_accel2));
9110         struct access_method access = SA5_performant_access;
9111
9112         /* This is a bit complicated.  There are 8 registers on
9113          * the controller which we write to to tell it 8 different
9114          * sizes of commands which there may be.  It's a way of
9115          * reducing the DMA done to fetch each command.  Encoded into
9116          * each command's tag are 3 bits which communicate to the controller
9117          * which of the eight sizes that command fits within.  The size of
9118          * each command depends on how many scatter gather entries there are.
9119          * Each SG entry requires 16 bytes.  The eight registers are programmed
9120          * with the number of 16-byte blocks a command of that size requires.
9121          * The smallest command possible requires 5 such 16 byte blocks.
9122          * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
9123          * blocks.  Note, this only extends to the SG entries contained
9124          * within the command block, and does not extend to chained blocks
9125          * of SG elements.   bft[] contains the eight values we write to
9126          * the registers.  They are not evenly distributed, but have more
9127          * sizes for small commands, and fewer sizes for larger commands.
9128          */
9129         int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
9130 #define MIN_IOACCEL2_BFT_ENTRY 5
9131 #define HPSA_IOACCEL2_HEADER_SZ 4
9132         int bft2[16] = {MIN_IOACCEL2_BFT_ENTRY, 6, 7, 8, 9, 10, 11, 12,
9133                         13, 14, 15, 16, 17, 18, 19,
9134                         HPSA_IOACCEL2_HEADER_SZ + IOACCEL2_MAXSGENTRIES};
9135         BUILD_BUG_ON(ARRAY_SIZE(bft2) != 16);
9136         BUILD_BUG_ON(ARRAY_SIZE(bft) != 8);
9137         BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) >
9138                                  16 * MIN_IOACCEL2_BFT_ENTRY);
9139         BUILD_BUG_ON(sizeof(struct ioaccel2_sg_element) != 16);
9140         BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
9141         /*  5 = 1 s/g entry or 4k
9142          *  6 = 2 s/g entry or 8k
9143          *  8 = 4 s/g entry or 16k
9144          * 10 = 6 s/g entry or 24k
9145          */
9146
9147         /* If the controller supports either ioaccel method then
9148          * we can also use the RAID stack submit path that does not
9149          * perform the superfluous readl() after each command submission.
9150          */
9151         if (trans_support & (CFGTBL_Trans_io_accel1 | CFGTBL_Trans_io_accel2))
9152                 access = SA5_performant_access_no_read;
9153
9154         /* Controller spec: zero out this buffer. */
9155         for (i = 0; i < h->nreply_queues; i++)
9156                 memset(h->reply_queue[i].head, 0, h->reply_queue_size);
9157
9158         bft[7] = SG_ENTRIES_IN_CMD + 4;
9159         calc_bucket_map(bft, ARRAY_SIZE(bft),
9160                                 SG_ENTRIES_IN_CMD, 4, h->blockFetchTable);
9161         for (i = 0; i < 8; i++)
9162                 writel(bft[i], &h->transtable->BlockFetch[i]);
9163
9164         /* size of controller ring buffer */
9165         writel(h->max_commands, &h->transtable->RepQSize);
9166         writel(h->nreply_queues, &h->transtable->RepQCount);
9167         writel(0, &h->transtable->RepQCtrAddrLow32);
9168         writel(0, &h->transtable->RepQCtrAddrHigh32);
9169
9170         for (i = 0; i < h->nreply_queues; i++) {
9171                 writel(0, &h->transtable->RepQAddr[i].upper);
9172                 writel(h->reply_queue[i].busaddr,
9173                         &h->transtable->RepQAddr[i].lower);
9174         }
9175
9176         writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
9177         writel(transMethod, &(h->cfgtable->HostWrite.TransportRequest));
9178         /*
9179          * enable outbound interrupt coalescing in accelerator mode;
9180          */
9181         if (trans_support & CFGTBL_Trans_io_accel1) {
9182                 access = SA5_ioaccel_mode1_access;
9183                 writel(10, &h->cfgtable->HostWrite.CoalIntDelay);
9184                 writel(4, &h->cfgtable->HostWrite.CoalIntCount);
9185         } else
9186                 if (trans_support & CFGTBL_Trans_io_accel2)
9187                         access = SA5_ioaccel_mode2_access;
9188         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9189         if (hpsa_wait_for_mode_change_ack(h)) {
9190                 dev_err(&h->pdev->dev,
9191                         "performant mode problem - doorbell timeout\n");
9192                 return -ENODEV;
9193         }
9194         register_value = readl(&(h->cfgtable->TransportActive));
9195         if (!(register_value & CFGTBL_Trans_Performant)) {
9196                 dev_err(&h->pdev->dev,
9197                         "performant mode problem - transport not active\n");
9198                 return -ENODEV;
9199         }
9200         /* Change the access methods to the performant access methods */
9201         h->access = access;
9202         h->transMethod = transMethod;
9203
9204         if (!((trans_support & CFGTBL_Trans_io_accel1) ||
9205                 (trans_support & CFGTBL_Trans_io_accel2)))
9206                 return 0;
9207
9208         if (trans_support & CFGTBL_Trans_io_accel1) {
9209                 /* Set up I/O accelerator mode */
9210                 for (i = 0; i < h->nreply_queues; i++) {
9211                         writel(i, h->vaddr + IOACCEL_MODE1_REPLY_QUEUE_INDEX);
9212                         h->reply_queue[i].current_entry =
9213                                 readl(h->vaddr + IOACCEL_MODE1_PRODUCER_INDEX);
9214                 }
9215                 bft[7] = h->ioaccel_maxsg + 8;
9216                 calc_bucket_map(bft, ARRAY_SIZE(bft), h->ioaccel_maxsg, 8,
9217                                 h->ioaccel1_blockFetchTable);
9218
9219                 /* initialize all reply queue entries to unused */
9220                 for (i = 0; i < h->nreply_queues; i++)
9221                         memset(h->reply_queue[i].head,
9222                                 (u8) IOACCEL_MODE1_REPLY_UNUSED,
9223                                 h->reply_queue_size);
9224
9225                 /* set all the constant fields in the accelerator command
9226                  * frames once at init time to save CPU cycles later.
9227                  */
9228                 for (i = 0; i < h->nr_cmds; i++) {
9229                         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[i];
9230
9231                         cp->function = IOACCEL1_FUNCTION_SCSIIO;
9232                         cp->err_info = (u32) (h->errinfo_pool_dhandle +
9233                                         (i * sizeof(struct ErrorInfo)));
9234                         cp->err_info_len = sizeof(struct ErrorInfo);
9235                         cp->sgl_offset = IOACCEL1_SGLOFFSET;
9236                         cp->host_context_flags =
9237                                 cpu_to_le16(IOACCEL1_HCFLAGS_CISS_FORMAT);
9238                         cp->timeout_sec = 0;
9239                         cp->ReplyQueue = 0;
9240                         cp->tag =
9241                                 cpu_to_le64((i << DIRECT_LOOKUP_SHIFT));
9242                         cp->host_addr =
9243                                 cpu_to_le64(h->ioaccel_cmd_pool_dhandle +
9244                                         (i * sizeof(struct io_accel1_cmd)));
9245                 }
9246         } else if (trans_support & CFGTBL_Trans_io_accel2) {
9247                 u64 cfg_offset, cfg_base_addr_index;
9248                 u32 bft2_offset, cfg_base_addr;
9249                 int rc;
9250
9251                 rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
9252                         &cfg_base_addr_index, &cfg_offset);
9253                 BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) != 64);
9254                 bft2[15] = h->ioaccel_maxsg + HPSA_IOACCEL2_HEADER_SZ;
9255                 calc_bucket_map(bft2, ARRAY_SIZE(bft2), h->ioaccel_maxsg,
9256                                 4, h->ioaccel2_blockFetchTable);
9257                 bft2_offset = readl(&h->cfgtable->io_accel_request_size_offset);
9258                 BUILD_BUG_ON(offsetof(struct CfgTable,
9259                                 io_accel_request_size_offset) != 0xb8);
9260                 h->ioaccel2_bft2_regs =
9261                         remap_pci_mem(pci_resource_start(h->pdev,
9262                                         cfg_base_addr_index) +
9263                                         cfg_offset + bft2_offset,
9264                                         ARRAY_SIZE(bft2) *
9265                                         sizeof(*h->ioaccel2_bft2_regs));
9266                 for (i = 0; i < ARRAY_SIZE(bft2); i++)
9267                         writel(bft2[i], &h->ioaccel2_bft2_regs[i]);
9268         }
9269         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9270         if (hpsa_wait_for_mode_change_ack(h)) {
9271                 dev_err(&h->pdev->dev,
9272                         "performant mode problem - enabling ioaccel mode\n");
9273                 return -ENODEV;
9274         }
9275         return 0;
9276 }
9277
9278 /* Free ioaccel1 mode command blocks and block fetch table */
9279 static void hpsa_free_ioaccel1_cmd_and_bft(struct ctlr_info *h)
9280 {
9281         if (h->ioaccel_cmd_pool) {
9282                 pci_free_consistent(h->pdev,
9283                         h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
9284                         h->ioaccel_cmd_pool,
9285                         h->ioaccel_cmd_pool_dhandle);
9286                 h->ioaccel_cmd_pool = NULL;
9287                 h->ioaccel_cmd_pool_dhandle = 0;
9288         }
9289         kfree(h->ioaccel1_blockFetchTable);
9290         h->ioaccel1_blockFetchTable = NULL;
9291 }
9292
9293 /* Allocate ioaccel1 mode command blocks and block fetch table */
9294 static int hpsa_alloc_ioaccel1_cmd_and_bft(struct ctlr_info *h)
9295 {
9296         h->ioaccel_maxsg =
9297                 readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
9298         if (h->ioaccel_maxsg > IOACCEL1_MAXSGENTRIES)
9299                 h->ioaccel_maxsg = IOACCEL1_MAXSGENTRIES;
9300
9301         /* Command structures must be aligned on a 128-byte boundary
9302          * because the 7 lower bits of the address are used by the
9303          * hardware.
9304          */
9305         BUILD_BUG_ON(sizeof(struct io_accel1_cmd) %
9306                         IOACCEL1_COMMANDLIST_ALIGNMENT);
9307         h->ioaccel_cmd_pool =
9308                 dma_alloc_coherent(&h->pdev->dev,
9309                         h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
9310                         &h->ioaccel_cmd_pool_dhandle, GFP_KERNEL);
9311
9312         h->ioaccel1_blockFetchTable =
9313                 kmalloc(((h->ioaccel_maxsg + 1) *
9314                                 sizeof(u32)), GFP_KERNEL);
9315
9316         if ((h->ioaccel_cmd_pool == NULL) ||
9317                 (h->ioaccel1_blockFetchTable == NULL))
9318                 goto clean_up;
9319
9320         memset(h->ioaccel_cmd_pool, 0,
9321                 h->nr_cmds * sizeof(*h->ioaccel_cmd_pool));
9322         return 0;
9323
9324 clean_up:
9325         hpsa_free_ioaccel1_cmd_and_bft(h);
9326         return -ENOMEM;
9327 }
9328
9329 /* Free ioaccel2 mode command blocks and block fetch table */
9330 static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h)
9331 {
9332         hpsa_free_ioaccel2_sg_chain_blocks(h);
9333
9334         if (h->ioaccel2_cmd_pool) {
9335                 pci_free_consistent(h->pdev,
9336                         h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
9337                         h->ioaccel2_cmd_pool,
9338                         h->ioaccel2_cmd_pool_dhandle);
9339                 h->ioaccel2_cmd_pool = NULL;
9340                 h->ioaccel2_cmd_pool_dhandle = 0;
9341         }
9342         kfree(h->ioaccel2_blockFetchTable);
9343         h->ioaccel2_blockFetchTable = NULL;
9344 }
9345
9346 /* Allocate ioaccel2 mode command blocks and block fetch table */
9347 static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
9348 {
9349         int rc;
9350
9351         /* Allocate ioaccel2 mode command blocks and block fetch table */
9352
9353         h->ioaccel_maxsg =
9354                 readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
9355         if (h->ioaccel_maxsg > IOACCEL2_MAXSGENTRIES)
9356                 h->ioaccel_maxsg = IOACCEL2_MAXSGENTRIES;
9357
9358         BUILD_BUG_ON(sizeof(struct io_accel2_cmd) %
9359                         IOACCEL2_COMMANDLIST_ALIGNMENT);
9360         h->ioaccel2_cmd_pool =
9361                 dma_alloc_coherent(&h->pdev->dev,
9362                         h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
9363                         &h->ioaccel2_cmd_pool_dhandle, GFP_KERNEL);
9364
9365         h->ioaccel2_blockFetchTable =
9366                 kmalloc(((h->ioaccel_maxsg + 1) *
9367                                 sizeof(u32)), GFP_KERNEL);
9368
9369         if ((h->ioaccel2_cmd_pool == NULL) ||
9370                 (h->ioaccel2_blockFetchTable == NULL)) {
9371                 rc = -ENOMEM;
9372                 goto clean_up;
9373         }
9374
9375         rc = hpsa_allocate_ioaccel2_sg_chain_blocks(h);
9376         if (rc)
9377                 goto clean_up;
9378
9379         memset(h->ioaccel2_cmd_pool, 0,
9380                 h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool));
9381         return 0;
9382
9383 clean_up:
9384         hpsa_free_ioaccel2_cmd_and_bft(h);
9385         return rc;
9386 }
9387
9388 /* Free items allocated by hpsa_put_ctlr_into_performant_mode */
9389 static void hpsa_free_performant_mode(struct ctlr_info *h)
9390 {
9391         kfree(h->blockFetchTable);
9392         h->blockFetchTable = NULL;
9393         hpsa_free_reply_queues(h);
9394         hpsa_free_ioaccel1_cmd_and_bft(h);
9395         hpsa_free_ioaccel2_cmd_and_bft(h);
9396 }
9397
9398 /* return -ENODEV on error, 0 on success (or no action)
9399  * allocates numerous items that must be freed later
9400  */
9401 static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
9402 {
9403         u32 trans_support;
9404         unsigned long transMethod = CFGTBL_Trans_Performant |
9405                                         CFGTBL_Trans_use_short_tags;
9406         int i, rc;
9407
9408         if (hpsa_simple_mode)
9409                 return 0;
9410
9411         trans_support = readl(&(h->cfgtable->TransportSupport));
9412         if (!(trans_support & PERFORMANT_MODE))
9413                 return 0;
9414
9415         /* Check for I/O accelerator mode support */
9416         if (trans_support & CFGTBL_Trans_io_accel1) {
9417                 transMethod |= CFGTBL_Trans_io_accel1 |
9418                                 CFGTBL_Trans_enable_directed_msix;
9419                 rc = hpsa_alloc_ioaccel1_cmd_and_bft(h);
9420                 if (rc)
9421                         return rc;
9422         } else if (trans_support & CFGTBL_Trans_io_accel2) {
9423                 transMethod |= CFGTBL_Trans_io_accel2 |
9424                                 CFGTBL_Trans_enable_directed_msix;
9425                 rc = hpsa_alloc_ioaccel2_cmd_and_bft(h);
9426                 if (rc)
9427                         return rc;
9428         }
9429
9430         h->nreply_queues = h->msix_vectors > 0 ? h->msix_vectors : 1;
9431         hpsa_get_max_perf_mode_cmds(h);
9432         /* Performant mode ring buffer and supporting data structures */
9433         h->reply_queue_size = h->max_commands * sizeof(u64);
9434
9435         for (i = 0; i < h->nreply_queues; i++) {
9436                 h->reply_queue[i].head = dma_alloc_coherent(&h->pdev->dev,
9437                                                 h->reply_queue_size,
9438                                                 &h->reply_queue[i].busaddr,
9439                                                 GFP_KERNEL);
9440                 if (!h->reply_queue[i].head) {
9441                         rc = -ENOMEM;
9442                         goto clean1;    /* rq, ioaccel */
9443                 }
9444                 h->reply_queue[i].size = h->max_commands;
9445                 h->reply_queue[i].wraparound = 1;  /* spec: init to 1 */
9446                 h->reply_queue[i].current_entry = 0;
9447         }
9448
9449         /* Need a block fetch table for performant mode */
9450         h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
9451                                 sizeof(u32)), GFP_KERNEL);
9452         if (!h->blockFetchTable) {
9453                 rc = -ENOMEM;
9454                 goto clean1;    /* rq, ioaccel */
9455         }
9456
9457         rc = hpsa_enter_performant_mode(h, trans_support);
9458         if (rc)
9459                 goto clean2;    /* bft, rq, ioaccel */
9460         return 0;
9461
9462 clean2: /* bft, rq, ioaccel */
9463         kfree(h->blockFetchTable);
9464         h->blockFetchTable = NULL;
9465 clean1: /* rq, ioaccel */
9466         hpsa_free_reply_queues(h);
9467         hpsa_free_ioaccel1_cmd_and_bft(h);
9468         hpsa_free_ioaccel2_cmd_and_bft(h);
9469         return rc;
9470 }
9471
9472 static int is_accelerated_cmd(struct CommandList *c)
9473 {
9474         return c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_IOACCEL2;
9475 }
9476
9477 static void hpsa_drain_accel_commands(struct ctlr_info *h)
9478 {
9479         struct CommandList *c = NULL;
9480         int i, accel_cmds_out;
9481         int refcount;
9482
9483         do { /* wait for all outstanding ioaccel commands to drain out */
9484                 accel_cmds_out = 0;
9485                 for (i = 0; i < h->nr_cmds; i++) {
9486                         c = h->cmd_pool + i;
9487                         refcount = atomic_inc_return(&c->refcount);
9488                         if (refcount > 1) /* Command is allocated */
9489                                 accel_cmds_out += is_accelerated_cmd(c);
9490                         cmd_free(h, c);
9491                 }
9492                 if (accel_cmds_out <= 0)
9493                         break;
9494                 msleep(100);
9495         } while (1);
9496 }
9497
9498 static struct hpsa_sas_phy *hpsa_alloc_sas_phy(
9499                                 struct hpsa_sas_port *hpsa_sas_port)
9500 {
9501         struct hpsa_sas_phy *hpsa_sas_phy;
9502         struct sas_phy *phy;
9503
9504         hpsa_sas_phy = kzalloc(sizeof(*hpsa_sas_phy), GFP_KERNEL);
9505         if (!hpsa_sas_phy)
9506                 return NULL;
9507
9508         phy = sas_phy_alloc(hpsa_sas_port->parent_node->parent_dev,
9509                 hpsa_sas_port->next_phy_index);
9510         if (!phy) {
9511                 kfree(hpsa_sas_phy);
9512                 return NULL;
9513         }
9514
9515         hpsa_sas_port->next_phy_index++;
9516         hpsa_sas_phy->phy = phy;
9517         hpsa_sas_phy->parent_port = hpsa_sas_port;
9518
9519         return hpsa_sas_phy;
9520 }
9521
9522 static void hpsa_free_sas_phy(struct hpsa_sas_phy *hpsa_sas_phy)
9523 {
9524         struct sas_phy *phy = hpsa_sas_phy->phy;
9525
9526         sas_port_delete_phy(hpsa_sas_phy->parent_port->port, phy);
9527         if (hpsa_sas_phy->added_to_port)
9528                 list_del(&hpsa_sas_phy->phy_list_entry);
9529         sas_phy_delete(phy);
9530         kfree(hpsa_sas_phy);
9531 }
9532
9533 static int hpsa_sas_port_add_phy(struct hpsa_sas_phy *hpsa_sas_phy)
9534 {
9535         int rc;
9536         struct hpsa_sas_port *hpsa_sas_port;
9537         struct sas_phy *phy;
9538         struct sas_identify *identify;
9539
9540         hpsa_sas_port = hpsa_sas_phy->parent_port;
9541         phy = hpsa_sas_phy->phy;
9542
9543         identify = &phy->identify;
9544         memset(identify, 0, sizeof(*identify));
9545         identify->sas_address = hpsa_sas_port->sas_address;
9546         identify->device_type = SAS_END_DEVICE;
9547         identify->initiator_port_protocols = SAS_PROTOCOL_STP;
9548         identify->target_port_protocols = SAS_PROTOCOL_STP;
9549         phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
9550         phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
9551         phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
9552         phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
9553         phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
9554
9555         rc = sas_phy_add(hpsa_sas_phy->phy);
9556         if (rc)
9557                 return rc;
9558
9559         sas_port_add_phy(hpsa_sas_port->port, hpsa_sas_phy->phy);
9560         list_add_tail(&hpsa_sas_phy->phy_list_entry,
9561                         &hpsa_sas_port->phy_list_head);
9562         hpsa_sas_phy->added_to_port = true;
9563
9564         return 0;
9565 }
9566
9567 static int
9568         hpsa_sas_port_add_rphy(struct hpsa_sas_port *hpsa_sas_port,
9569                                 struct sas_rphy *rphy)
9570 {
9571         struct sas_identify *identify;
9572
9573         identify = &rphy->identify;
9574         identify->sas_address = hpsa_sas_port->sas_address;
9575         identify->initiator_port_protocols = SAS_PROTOCOL_STP;
9576         identify->target_port_protocols = SAS_PROTOCOL_STP;
9577
9578         return sas_rphy_add(rphy);
9579 }
9580
9581 static struct hpsa_sas_port
9582         *hpsa_alloc_sas_port(struct hpsa_sas_node *hpsa_sas_node,
9583                                 u64 sas_address)
9584 {
9585         int rc;
9586         struct hpsa_sas_port *hpsa_sas_port;
9587         struct sas_port *port;
9588
9589         hpsa_sas_port = kzalloc(sizeof(*hpsa_sas_port), GFP_KERNEL);
9590         if (!hpsa_sas_port)
9591                 return NULL;
9592
9593         INIT_LIST_HEAD(&hpsa_sas_port->phy_list_head);
9594         hpsa_sas_port->parent_node = hpsa_sas_node;
9595
9596         port = sas_port_alloc_num(hpsa_sas_node->parent_dev);
9597         if (!port)
9598                 goto free_hpsa_port;
9599
9600         rc = sas_port_add(port);
9601         if (rc)
9602                 goto free_sas_port;
9603
9604         hpsa_sas_port->port = port;
9605         hpsa_sas_port->sas_address = sas_address;
9606         list_add_tail(&hpsa_sas_port->port_list_entry,
9607                         &hpsa_sas_node->port_list_head);
9608
9609         return hpsa_sas_port;
9610
9611 free_sas_port:
9612         sas_port_free(port);
9613 free_hpsa_port:
9614         kfree(hpsa_sas_port);
9615
9616         return NULL;
9617 }
9618
9619 static void hpsa_free_sas_port(struct hpsa_sas_port *hpsa_sas_port)
9620 {
9621         struct hpsa_sas_phy *hpsa_sas_phy;
9622         struct hpsa_sas_phy *next;
9623
9624         list_for_each_entry_safe(hpsa_sas_phy, next,
9625                         &hpsa_sas_port->phy_list_head, phy_list_entry)
9626                 hpsa_free_sas_phy(hpsa_sas_phy);
9627
9628         sas_port_delete(hpsa_sas_port->port);
9629         list_del(&hpsa_sas_port->port_list_entry);
9630         kfree(hpsa_sas_port);
9631 }
9632
9633 static struct hpsa_sas_node *hpsa_alloc_sas_node(struct device *parent_dev)
9634 {
9635         struct hpsa_sas_node *hpsa_sas_node;
9636
9637         hpsa_sas_node = kzalloc(sizeof(*hpsa_sas_node), GFP_KERNEL);
9638         if (hpsa_sas_node) {
9639                 hpsa_sas_node->parent_dev = parent_dev;
9640                 INIT_LIST_HEAD(&hpsa_sas_node->port_list_head);
9641         }
9642
9643         return hpsa_sas_node;
9644 }
9645
9646 static void hpsa_free_sas_node(struct hpsa_sas_node *hpsa_sas_node)
9647 {
9648         struct hpsa_sas_port *hpsa_sas_port;
9649         struct hpsa_sas_port *next;
9650
9651         if (!hpsa_sas_node)
9652                 return;
9653
9654         list_for_each_entry_safe(hpsa_sas_port, next,
9655                         &hpsa_sas_node->port_list_head, port_list_entry)
9656                 hpsa_free_sas_port(hpsa_sas_port);
9657
9658         kfree(hpsa_sas_node);
9659 }
9660
9661 static struct hpsa_scsi_dev_t
9662         *hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
9663                                         struct sas_rphy *rphy)
9664 {
9665         int i;
9666         struct hpsa_scsi_dev_t *device;
9667
9668         for (i = 0; i < h->ndevices; i++) {
9669                 device = h->dev[i];
9670                 if (!device->sas_port)
9671                         continue;
9672                 if (device->sas_port->rphy == rphy)
9673                         return device;
9674         }
9675
9676         return NULL;
9677 }
9678
9679 static int hpsa_add_sas_host(struct ctlr_info *h)
9680 {
9681         int rc;
9682         struct device *parent_dev;
9683         struct hpsa_sas_node *hpsa_sas_node;
9684         struct hpsa_sas_port *hpsa_sas_port;
9685         struct hpsa_sas_phy *hpsa_sas_phy;
9686
9687         parent_dev = &h->scsi_host->shost_dev;
9688
9689         hpsa_sas_node = hpsa_alloc_sas_node(parent_dev);
9690         if (!hpsa_sas_node)
9691                 return -ENOMEM;
9692
9693         hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, h->sas_address);
9694         if (!hpsa_sas_port) {
9695                 rc = -ENODEV;
9696                 goto free_sas_node;
9697         }
9698
9699         hpsa_sas_phy = hpsa_alloc_sas_phy(hpsa_sas_port);
9700         if (!hpsa_sas_phy) {
9701                 rc = -ENODEV;
9702                 goto free_sas_port;
9703         }
9704
9705         rc = hpsa_sas_port_add_phy(hpsa_sas_phy);
9706         if (rc)
9707                 goto free_sas_phy;
9708
9709         h->sas_host = hpsa_sas_node;
9710
9711         return 0;
9712
9713 free_sas_phy:
9714         hpsa_free_sas_phy(hpsa_sas_phy);
9715 free_sas_port:
9716         hpsa_free_sas_port(hpsa_sas_port);
9717 free_sas_node:
9718         hpsa_free_sas_node(hpsa_sas_node);
9719
9720         return rc;
9721 }
9722
9723 static void hpsa_delete_sas_host(struct ctlr_info *h)
9724 {
9725         hpsa_free_sas_node(h->sas_host);
9726 }
9727
9728 static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
9729                                 struct hpsa_scsi_dev_t *device)
9730 {
9731         int rc;
9732         struct hpsa_sas_port *hpsa_sas_port;
9733         struct sas_rphy *rphy;
9734
9735         hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, device->sas_address);
9736         if (!hpsa_sas_port)
9737                 return -ENOMEM;
9738
9739         rphy = sas_end_device_alloc(hpsa_sas_port->port);
9740         if (!rphy) {
9741                 rc = -ENODEV;
9742                 goto free_sas_port;
9743         }
9744
9745         hpsa_sas_port->rphy = rphy;
9746         device->sas_port = hpsa_sas_port;
9747
9748         rc = hpsa_sas_port_add_rphy(hpsa_sas_port, rphy);
9749         if (rc)
9750                 goto free_sas_port;
9751
9752         return 0;
9753
9754 free_sas_port:
9755         hpsa_free_sas_port(hpsa_sas_port);
9756         device->sas_port = NULL;
9757
9758         return rc;
9759 }
9760
9761 static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device)
9762 {
9763         if (device->sas_port) {
9764                 hpsa_free_sas_port(device->sas_port);
9765                 device->sas_port = NULL;
9766         }
9767 }
9768
9769 static int
9770 hpsa_sas_get_linkerrors(struct sas_phy *phy)
9771 {
9772         return 0;
9773 }
9774
9775 static int
9776 hpsa_sas_get_enclosure_identifier(struct sas_rphy *rphy, u64 *identifier)
9777 {
9778         struct Scsi_Host *shost = phy_to_shost(rphy);
9779         struct ctlr_info *h;
9780         struct hpsa_scsi_dev_t *sd;
9781
9782         if (!shost)
9783                 return -ENXIO;
9784
9785         h = shost_to_hba(shost);
9786
9787         if (!h)
9788                 return -ENXIO;
9789
9790         sd = hpsa_find_device_by_sas_rphy(h, rphy);
9791         if (!sd)
9792                 return -ENXIO;
9793
9794         *identifier = sd->eli;
9795
9796         return 0;
9797 }
9798
9799 static int
9800 hpsa_sas_get_bay_identifier(struct sas_rphy *rphy)
9801 {
9802         return -ENXIO;
9803 }
9804
9805 static int
9806 hpsa_sas_phy_reset(struct sas_phy *phy, int hard_reset)
9807 {
9808         return 0;
9809 }
9810
9811 static int
9812 hpsa_sas_phy_enable(struct sas_phy *phy, int enable)
9813 {
9814         return 0;
9815 }
9816
9817 static int
9818 hpsa_sas_phy_setup(struct sas_phy *phy)
9819 {
9820         return 0;
9821 }
9822
9823 static void
9824 hpsa_sas_phy_release(struct sas_phy *phy)
9825 {
9826 }
9827
9828 static int
9829 hpsa_sas_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates)
9830 {
9831         return -EINVAL;
9832 }
9833
9834 static struct sas_function_template hpsa_sas_transport_functions = {
9835         .get_linkerrors = hpsa_sas_get_linkerrors,
9836         .get_enclosure_identifier = hpsa_sas_get_enclosure_identifier,
9837         .get_bay_identifier = hpsa_sas_get_bay_identifier,
9838         .phy_reset = hpsa_sas_phy_reset,
9839         .phy_enable = hpsa_sas_phy_enable,
9840         .phy_setup = hpsa_sas_phy_setup,
9841         .phy_release = hpsa_sas_phy_release,
9842         .set_phy_speed = hpsa_sas_phy_speed,
9843 };
9844
9845 /*
9846  *  This is it.  Register the PCI driver information for the cards we control
9847  *  the OS will call our registered routines when it finds one of our cards.
9848  */
9849 static int __init hpsa_init(void)
9850 {
9851         int rc;
9852
9853         hpsa_sas_transport_template =
9854                 sas_attach_transport(&hpsa_sas_transport_functions);
9855         if (!hpsa_sas_transport_template)
9856                 return -ENODEV;
9857
9858         rc = pci_register_driver(&hpsa_pci_driver);
9859
9860         if (rc)
9861                 sas_release_transport(hpsa_sas_transport_template);
9862
9863         return rc;
9864 }
9865
9866 static void __exit hpsa_cleanup(void)
9867 {
9868         pci_unregister_driver(&hpsa_pci_driver);
9869         sas_release_transport(hpsa_sas_transport_template);
9870 }
9871
9872 static void __attribute__((unused)) verify_offsets(void)
9873 {
9874 #define VERIFY_OFFSET(member, offset) \
9875         BUILD_BUG_ON(offsetof(struct raid_map_data, member) != offset)
9876
9877         VERIFY_OFFSET(structure_size, 0);
9878         VERIFY_OFFSET(volume_blk_size, 4);
9879         VERIFY_OFFSET(volume_blk_cnt, 8);
9880         VERIFY_OFFSET(phys_blk_shift, 16);
9881         VERIFY_OFFSET(parity_rotation_shift, 17);
9882         VERIFY_OFFSET(strip_size, 18);
9883         VERIFY_OFFSET(disk_starting_blk, 20);
9884         VERIFY_OFFSET(disk_blk_cnt, 28);
9885         VERIFY_OFFSET(data_disks_per_row, 36);
9886         VERIFY_OFFSET(metadata_disks_per_row, 38);
9887         VERIFY_OFFSET(row_cnt, 40);
9888         VERIFY_OFFSET(layout_map_count, 42);
9889         VERIFY_OFFSET(flags, 44);
9890         VERIFY_OFFSET(dekindex, 46);
9891         /* VERIFY_OFFSET(reserved, 48 */
9892         VERIFY_OFFSET(data, 64);
9893
9894 #undef VERIFY_OFFSET
9895
9896 #define VERIFY_OFFSET(member, offset) \
9897         BUILD_BUG_ON(offsetof(struct io_accel2_cmd, member) != offset)
9898
9899         VERIFY_OFFSET(IU_type, 0);
9900         VERIFY_OFFSET(direction, 1);
9901         VERIFY_OFFSET(reply_queue, 2);
9902         /* VERIFY_OFFSET(reserved1, 3);  */
9903         VERIFY_OFFSET(scsi_nexus, 4);
9904         VERIFY_OFFSET(Tag, 8);
9905         VERIFY_OFFSET(cdb, 16);
9906         VERIFY_OFFSET(cciss_lun, 32);
9907         VERIFY_OFFSET(data_len, 40);
9908         VERIFY_OFFSET(cmd_priority_task_attr, 44);
9909         VERIFY_OFFSET(sg_count, 45);
9910         /* VERIFY_OFFSET(reserved3 */
9911         VERIFY_OFFSET(err_ptr, 48);
9912         VERIFY_OFFSET(err_len, 56);
9913         /* VERIFY_OFFSET(reserved4  */
9914         VERIFY_OFFSET(sg, 64);
9915
9916 #undef VERIFY_OFFSET
9917
9918 #define VERIFY_OFFSET(member, offset) \
9919         BUILD_BUG_ON(offsetof(struct io_accel1_cmd, member) != offset)
9920
9921         VERIFY_OFFSET(dev_handle, 0x00);
9922         VERIFY_OFFSET(reserved1, 0x02);
9923         VERIFY_OFFSET(function, 0x03);
9924         VERIFY_OFFSET(reserved2, 0x04);
9925         VERIFY_OFFSET(err_info, 0x0C);
9926         VERIFY_OFFSET(reserved3, 0x10);
9927         VERIFY_OFFSET(err_info_len, 0x12);
9928         VERIFY_OFFSET(reserved4, 0x13);
9929         VERIFY_OFFSET(sgl_offset, 0x14);
9930         VERIFY_OFFSET(reserved5, 0x15);
9931         VERIFY_OFFSET(transfer_len, 0x1C);
9932         VERIFY_OFFSET(reserved6, 0x20);
9933         VERIFY_OFFSET(io_flags, 0x24);
9934         VERIFY_OFFSET(reserved7, 0x26);
9935         VERIFY_OFFSET(LUN, 0x34);
9936         VERIFY_OFFSET(control, 0x3C);
9937         VERIFY_OFFSET(CDB, 0x40);
9938         VERIFY_OFFSET(reserved8, 0x50);
9939         VERIFY_OFFSET(host_context_flags, 0x60);
9940         VERIFY_OFFSET(timeout_sec, 0x62);
9941         VERIFY_OFFSET(ReplyQueue, 0x64);
9942         VERIFY_OFFSET(reserved9, 0x65);
9943         VERIFY_OFFSET(tag, 0x68);
9944         VERIFY_OFFSET(host_addr, 0x70);
9945         VERIFY_OFFSET(CISS_LUN, 0x78);
9946         VERIFY_OFFSET(SG, 0x78 + 8);
9947 #undef VERIFY_OFFSET
9948 }
9949
9950 module_init(hpsa_init);
9951 module_exit(hpsa_cleanup);