drivers/scsi/myrs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Linux Driver for Mylex DAC960/AcceleRAID/eXtremeRAID PCI RAID Controllers
   4  *
   5  * This driver supports the newer, SCSI-based firmware interface only.
   6  *
   7  * Copyright 2017 Hannes Reinecke, SUSE Linux GmbH <hare@suse.com>
   8  *
   9  * Based on the original DAC960 driver, which has
  10  * Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com>
  11  * Portions Copyright 2002 by Mylex (An IBM Business Unit)
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16 #include <linux/delay.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/pci.h>
  19 #include <linux/raid_class.h>
  20 #include <asm/unaligned.h>
  21 #include <scsi/scsi.h>
  22 #include <scsi/scsi_host.h>
  23 #include <scsi/scsi_device.h>
  24 #include <scsi/scsi_cmnd.h>
  25 #include <scsi/scsi_tcq.h>
  26 #include "myrs.h"
  27
  28 static struct raid_template *myrs_raid_template;
  29
  30 static struct myrs_devstate_name_entry {
  31         enum myrs_devstate state;
  32         char *name;
  33 } myrs_devstate_name_list[] = {
  34         { MYRS_DEVICE_UNCONFIGURED, "Unconfigured" },
  35         { MYRS_DEVICE_ONLINE, "Online" },
  36         { MYRS_DEVICE_REBUILD, "Rebuild" },
  37         { MYRS_DEVICE_MISSING, "Missing" },
  38         { MYRS_DEVICE_SUSPECTED_CRITICAL, "SuspectedCritical" },
  39         { MYRS_DEVICE_OFFLINE, "Offline" },
  40         { MYRS_DEVICE_CRITICAL, "Critical" },
  41         { MYRS_DEVICE_SUSPECTED_DEAD, "SuspectedDead" },
  42         { MYRS_DEVICE_COMMANDED_OFFLINE, "CommandedOffline" },
  43         { MYRS_DEVICE_STANDBY, "Standby" },
  44         { MYRS_DEVICE_INVALID_STATE, "Invalid" },
  45 };
  46
  47 static char *myrs_devstate_name(enum myrs_devstate state)
  48 {
  49         struct myrs_devstate_name_entry *entry = myrs_devstate_name_list;
  50         int i;
  51
  52         for (i = 0; i < ARRAY_SIZE(myrs_devstate_name_list); i++) {
  53                 if (entry[i].state == state)
  54                         return entry[i].name;
  55         }
  56         return NULL;
  57 }
  58
  59 static struct myrs_raid_level_name_entry {
  60         enum myrs_raid_level level;
  61         char *name;
  62 } myrs_raid_level_name_list[] = {
  63         { MYRS_RAID_LEVEL0, "RAID0" },
  64         { MYRS_RAID_LEVEL1, "RAID1" },
  65         { MYRS_RAID_LEVEL3, "RAID3 right asymmetric parity" },
  66         { MYRS_RAID_LEVEL5, "RAID5 right asymmetric parity" },
  67         { MYRS_RAID_LEVEL6, "RAID6" },
  68         { MYRS_RAID_JBOD, "JBOD" },
  69         { MYRS_RAID_NEWSPAN, "New Mylex SPAN" },
  70         { MYRS_RAID_LEVEL3F, "RAID3 fixed parity" },
  71         { MYRS_RAID_LEVEL3L, "RAID3 left symmetric parity" },
  72         { MYRS_RAID_SPAN, "Mylex SPAN" },
  73         { MYRS_RAID_LEVEL5L, "RAID5 left symmetric parity" },
  74         { MYRS_RAID_LEVELE, "RAIDE (concatenation)" },
  75         { MYRS_RAID_PHYSICAL, "Physical device" },
  76 };
  77
  78 static char *myrs_raid_level_name(enum myrs_raid_level level)
  79 {
  80         struct myrs_raid_level_name_entry *entry = myrs_raid_level_name_list;
  81         int i;
  82
  83         for (i = 0; i < ARRAY_SIZE(myrs_raid_level_name_list); i++) {
  84                 if (entry[i].level == level)
  85                         return entry[i].name;
  86         }
  87         return NULL;
  88 }
  89
  90 /*
  91  * myrs_reset_cmd - clears critical fields in struct myrs_cmdblk
  92  */
  93 static inline void myrs_reset_cmd(struct myrs_cmdblk *cmd_blk)
  94 {
  95         union myrs_cmd_mbox *mbox = &cmd_blk->mbox;
  96
  97         memset(mbox, 0, sizeof(union myrs_cmd_mbox));
  98         cmd_blk->status = 0;
  99 }
 100
 101 /*
 102  * myrs_qcmd - queues Command for DAC960 V2 Series Controllers.
 103  */
 104 static void myrs_qcmd(struct myrs_hba *cs, struct myrs_cmdblk *cmd_blk)
 105 {
 106         void __iomem *base = cs->io_base;
 107         union myrs_cmd_mbox *mbox = &cmd_blk->mbox;
 108         union myrs_cmd_mbox *next_mbox = cs->next_cmd_mbox;
 109
 110         cs->write_cmd_mbox(next_mbox, mbox);
 111
 112         if (cs->prev_cmd_mbox1->words[0] == 0 ||
 113             cs->prev_cmd_mbox2->words[0] == 0)
 114                 cs->get_cmd_mbox(base);
 115
 116         cs->prev_cmd_mbox2 = cs->prev_cmd_mbox1;
 117         cs->prev_cmd_mbox1 = next_mbox;
 118
 119         if (++next_mbox > cs->last_cmd_mbox)
 120                 next_mbox = cs->first_cmd_mbox;
 121
 122         cs->next_cmd_mbox = next_mbox;
 123 }
 124
 125 /*
 126  * myrs_exec_cmd - executes V2 Command and waits for completion.
 127  */
 128 static void myrs_exec_cmd(struct myrs_hba *cs,
 129                 struct myrs_cmdblk *cmd_blk)
 130 {
 131         DECLARE_COMPLETION_ONSTACK(complete);
 132         unsigned long flags;
 133
 134         cmd_blk->complete = &complete;
 135         spin_lock_irqsave(&cs->queue_lock, flags);
 136         myrs_qcmd(cs, cmd_blk);
 137         spin_unlock_irqrestore(&cs->queue_lock, flags);
 138
 139         wait_for_completion(&complete);
 140 }
 141
 142 /*
 143  * myrs_report_progress - prints progress message
 144  */
 145 static void myrs_report_progress(struct myrs_hba *cs, unsigned short ldev_num,
 146                 unsigned char *msg, unsigned long blocks,
 147                 unsigned long size)
 148 {
 149         shost_printk(KERN_INFO, cs->host,
 150                      "Logical Drive %d: %s in Progress: %d%% completed\n",
 151                      ldev_num, msg,
 152                      (100 * (int)(blocks >> 7)) / (int)(size >> 7));
 153 }
 154
 155 /*
 156  * myrs_get_ctlr_info - executes a Controller Information IOCTL Command
 157  */
 158 static unsigned char myrs_get_ctlr_info(struct myrs_hba *cs)
 159 {
 160         struct myrs_cmdblk *cmd_blk = &cs->dcmd_blk;
 161         union myrs_cmd_mbox *mbox = &cmd_blk->mbox;
 162         dma_addr_t ctlr_info_addr;
 163         union myrs_sgl *sgl;
 164         unsigned char status;
 165         unsigned short ldev_present, ldev_critical, ldev_offline;
 166
 167         ldev_present = cs->ctlr_info->ldev_present;
 168         ldev_critical = cs->ctlr_info->ldev_critical;
 169         ldev_offline = cs->ctlr_info->ldev_offline;
 170
 171         ctlr_info_addr = dma_map_single(&cs->pdev->dev, cs->ctlr_info,
 172                                         sizeof(struct myrs_ctlr_info),
 173                                         DMA_FROM_DEVICE);
 174         if (dma_mapping_error(&cs->pdev->dev, ctlr_info_addr))
 175                 return MYRS_STATUS_FAILED;
 176
 177         mutex_lock(&cs->dcmd_mutex);
 178         myrs_reset_cmd(cmd_blk);
 179         mbox->ctlr_info.id = MYRS_DCMD_TAG;
 180         mbox->ctlr_info.opcode = MYRS_CMD_OP_IOCTL;
 181         mbox->ctlr_info.control.dma_ctrl_to_host = true;
 182         mbox->ctlr_info.control.no_autosense = true;
 183         mbox->ctlr_info.dma_size = sizeof(struct myrs_ctlr_info);
 184         mbox->ctlr_info.ctlr_num = 0;
 185         mbox->ctlr_info.ioctl_opcode = MYRS_IOCTL_GET_CTLR_INFO;
 186         sgl = &mbox->ctlr_info.dma_addr;
 187         sgl->sge[0].sge_addr = ctlr_info_addr;
 188         sgl->sge[0].sge_count = mbox->ctlr_info.dma_size;
 189         dev_dbg(&cs->host->shost_gendev, "Sending GetControllerInfo\n");
 190         myrs_exec_cmd(cs, cmd_blk);
 191         status = cmd_blk->status;
 192         mutex_unlock(&cs->dcmd_mutex);
 193         dma_unmap_single(&cs->pdev->dev, ctlr_info_addr,
 194                          sizeof(struct myrs_ctlr_info), DMA_FROM_DEVICE);
 195         if (status == MYRS_STATUS_SUCCESS) {
 196                 if (cs->ctlr_info->bg_init_active +
 197                     cs->ctlr_info->ldev_init_active +
 198                     cs->ctlr_info->pdev_init_active +
 199                     cs->ctlr_info->cc_active +
 200                     cs->ctlr_info->rbld_active +
 201                     cs->ctlr_info->exp_active != 0)
 202                         cs->needs_update = true;
 203                 if (cs->ctlr_info->ldev_present != ldev_present ||
 204                     cs->ctlr_info->ldev_critical != ldev_critical ||
 205                     cs->ctlr_info->ldev_offline != ldev_offline)
 206                         shost_printk(KERN_INFO, cs->host,
 207                                      "Logical drive count changes (%d/%d/%d)\n",
 208                                      cs->ctlr_info->ldev_critical,
 209                                      cs->ctlr_info->ldev_offline,
 210                                      cs->ctlr_info->ldev_present);
 211         }
 212
 213         return status;
 214 }
 215
 216 /*
 217  * myrs_get_ldev_info - executes a Logical Device Information IOCTL Command
 218  */
 219 static unsigned char myrs_get_ldev_info(struct myrs_hba *cs,
 220                 unsigned short ldev_num, struct myrs_ldev_info *ldev_info)
 221 {
 222         struct myrs_cmdblk *cmd_blk = &cs->dcmd_blk;
 223         union myrs_cmd_mbox *mbox = &cmd_blk->mbox;
 224         dma_addr_t ldev_info_addr;
 225         struct myrs_ldev_info ldev_info_orig;
 226         union myrs_sgl *sgl;
 227         unsigned char status;
 228
 229         memcpy(&ldev_info_orig, ldev_info, sizeof(struct myrs_ldev_info));
 230         ldev_info_addr = dma_map_single(&cs->pdev->dev, ldev_info,
 231                                         sizeof(struct myrs_ldev_info),
 232                                         DMA_FROM_DEVICE);
 233         if (dma_mapping_error(&cs->pdev->dev, ldev_info_addr))
 234                 return MYRS_STATUS_FAILED;
 235
 236         mutex_lock(&cs->dcmd_mutex);
 237         myrs_reset_cmd(cmd_blk);
 238         mbox->ldev_info.id = MYRS_DCMD_TAG;
 239         mbox->ldev_info.opcode = MYRS_CMD_OP_IOCTL;
 240         mbox->ldev_info.control.dma_ctrl_to_host = true;
 241         mbox->ldev_info.control.no_autosense = true;
 242         mbox->ldev_info.dma_size = sizeof(struct myrs_ldev_info);
 243         mbox->ldev_info.ldev.ldev_num = ldev_num;
 244         mbox->ldev_info.ioctl_opcode = MYRS_IOCTL_GET_LDEV_INFO_VALID;
 245         sgl = &mbox->ldev_info.dma_addr;
 246         sgl->sge[0].sge_addr = ldev_info_addr;
 247         sgl->sge[0].sge_count = mbox->ldev_info.dma_size;
 248         dev_dbg(&cs->host->shost_gendev,
 249                 "Sending GetLogicalDeviceInfoValid for ldev %d\n", ldev_num);
 250         myrs_exec_cmd(cs, cmd_blk);
 251         status = cmd_blk->status;
 252         mutex_unlock(&cs->dcmd_mutex);
 253         dma_unmap_single(&cs->pdev->dev, ldev_info_addr,
 254                          sizeof(struct myrs_ldev_info), DMA_FROM_DEVICE);
 255         if (status == MYRS_STATUS_SUCCESS) {
 256                 unsigned short ldev_num = ldev_info->ldev_num;
 257                 struct myrs_ldev_info *new = ldev_info;
 258                 struct myrs_ldev_info *old = &ldev_info_orig;
 259                 unsigned long ldev_size = new->cfg_devsize;
 260
 261                 if (new->dev_state != old->dev_state) {
 262                         const char *name;
 263
 264                         name = myrs_devstate_name(new->dev_state);
 265                         shost_printk(KERN_INFO, cs->host,
 266                                      "Logical Drive %d is now %s\n",
 267                                      ldev_num, name ? name : "Invalid");
 268                 }
 269                 if ((new->soft_errs != old->soft_errs) ||
 270                     (new->cmds_failed != old->cmds_failed) ||
 271                     (new->deferred_write_errs != old->deferred_write_errs))
 272                         shost_printk(KERN_INFO, cs->host,
 273                                      "Logical Drive %d Errors: Soft = %d, Failed = %d, Deferred Write = %d\n",
 274                                      ldev_num, new->soft_errs,
 275                                      new->cmds_failed,
 276                                      new->deferred_write_errs);
 277                 if (new->bg_init_active)
 278                         myrs_report_progress(cs, ldev_num,
 279                                              "Background Initialization",
 280                                              new->bg_init_lba, ldev_size);
 281                 else if (new->fg_init_active)
 282                         myrs_report_progress(cs, ldev_num,
 283                                              "Foreground Initialization",
 284                                              new->fg_init_lba, ldev_size);
 285                 else if (new->migration_active)
 286                         myrs_report_progress(cs, ldev_num,
 287                                              "Data Migration",
 288                                              new->migration_lba, ldev_size);
 289                 else if (new->patrol_active)
 290                         myrs_report_progress(cs, ldev_num,
 291                                              "Patrol Operation",
 292                                              new->patrol_lba, ldev_size);
 293                 if (old->bg_init_active && !new->bg_init_active)
 294                         shost_printk(KERN_INFO, cs->host,
 295                                      "Logical Drive %d: Background Initialization %s\n",
 296                                      ldev_num,
 297                                      (new->ldev_control.ldev_init_done ?
 298                                       "Completed" : "Failed"));
 299         }
 300         return status;
 301 }
 302
 303 /*
 304  * myrs_get_pdev_info - executes a "Read Physical Device Information" Command
 305  */
 306 static unsigned char myrs_get_pdev_info(struct myrs_hba *cs,
 307                 unsigned char channel, unsigned char target, unsigned char lun,
 308                 struct myrs_pdev_info *pdev_info)
 309 {
 310         struct myrs_cmdblk *cmd_blk = &cs->dcmd_blk;
 311         union myrs_cmd_mbox *mbox = &cmd_blk->mbox;
 312         dma_addr_t pdev_info_addr;
 313         union myrs_sgl *sgl;
 314         unsigned char status;
 315
 316         pdev_info_addr = dma_map_single(&cs->pdev->dev, pdev_info,
 317                                         sizeof(struct myrs_pdev_info),
 318                                         DMA_FROM_DEVICE);
 319         if (dma_mapping_error(&cs->pdev->dev, pdev_info_addr))
 320                 return MYRS_STATUS_FAILED;
 321
 322         mutex_lock(&cs->dcmd_mutex);
 323         myrs_reset_cmd(cmd_blk);
 324         mbox->pdev_info.opcode = MYRS_CMD_OP_IOCTL;
 325         mbox->pdev_info.id = MYRS_DCMD_TAG;
 326         mbox->pdev_info.control.dma_ctrl_to_host = true;
 327         mbox->pdev_info.control.no_autosense = true;
 328         mbox->pdev_info.dma_size = sizeof(struct myrs_pdev_info);
 329         mbox->pdev_info.pdev.lun = lun;
 330         mbox->pdev_info.pdev.target = target;
 331         mbox->pdev_info.pdev.channel = channel;
 332         mbox->pdev_info.ioctl_opcode = MYRS_IOCTL_GET_PDEV_INFO_VALID;
 333         sgl = &mbox->pdev_info.dma_addr;
 334         sgl->sge[0].sge_addr = pdev_info_addr;
 335         sgl->sge[0].sge_count = mbox->pdev_info.dma_size;
 336         dev_dbg(&cs->host->shost_gendev,
 337                 "Sending GetPhysicalDeviceInfoValid for pdev %d:%d:%d\n",
 338                 channel, target, lun);
 339         myrs_exec_cmd(cs, cmd_blk);
 340         status = cmd_blk->status;
 341         mutex_unlock(&cs->dcmd_mutex);
 342         dma_unmap_single(&cs->pdev->dev, pdev_info_addr,
 343                          sizeof(struct myrs_pdev_info), DMA_FROM_DEVICE);
 344         return status;
 345 }
 346
 347 /*
 348  * myrs_dev_op - executes a "Device Operation" Command
 349  */
 350 static unsigned char myrs_dev_op(struct myrs_hba *cs,
 351                 enum myrs_ioctl_opcode opcode, enum myrs_opdev opdev)
 352 {
 353         struct myrs_cmdblk *cmd_blk = &cs->dcmd_blk;
 354         union myrs_cmd_mbox *mbox = &cmd_blk->mbox;
 355         unsigned char status;
 356
 357         mutex_lock(&cs->dcmd_mutex);
 358         myrs_reset_cmd(cmd_blk);
 359         mbox->dev_op.opcode = MYRS_CMD_OP_IOCTL;
 360         mbox->dev_op.id = MYRS_DCMD_TAG;
 361         mbox->dev_op.control.dma_ctrl_to_host = true;
 362         mbox->dev_op.control.no_autosense = true;
 363         mbox->dev_op.ioctl_opcode = opcode;
 364         mbox->dev_op.opdev = opdev;
 365         myrs_exec_cmd(cs, cmd_blk);
 366         status = cmd_blk->status;
 367         mutex_unlock(&cs->dcmd_mutex);
 368         return status;
 369 }
 370
 371 /*
 372  * myrs_translate_pdev - translates a Physical Device Channel and
 373  * TargetID into a Logical Device.
 374  */
 375 static unsigned char myrs_translate_pdev(struct myrs_hba *cs,
 376                 unsigned char channel, unsigned char target, unsigned char lun,
 377                 struct myrs_devmap *devmap)
 378 {
 379         struct pci_dev *pdev = cs->pdev;
 380         dma_addr_t devmap_addr;
 381         struct myrs_cmdblk *cmd_blk;
 382         union myrs_cmd_mbox *mbox;
 383         union myrs_sgl *sgl;
 384         unsigned char status;
 385
 386         memset(devmap, 0x0, sizeof(struct myrs_devmap));
 387         devmap_addr = dma_map_single(&pdev->dev, devmap,
 388                                      sizeof(struct myrs_devmap),
 389                                      DMA_FROM_DEVICE);
 390         if (dma_mapping_error(&pdev->dev, devmap_addr))
 391                 return MYRS_STATUS_FAILED;
 392
 393         mutex_lock(&cs->dcmd_mutex);
 394         cmd_blk = &cs->dcmd_blk;
 395         mbox = &cmd_blk->mbox;
 396         mbox->pdev_info.opcode = MYRS_CMD_OP_IOCTL;
 397         mbox->pdev_info.control.dma_ctrl_to_host = true;
 398         mbox->pdev_info.control.no_autosense = true;
 399         mbox->pdev_info.dma_size = sizeof(struct myrs_devmap);
 400         mbox->pdev_info.pdev.target = target;
 401         mbox->pdev_info.pdev.channel = channel;
 402         mbox->pdev_info.pdev.lun = lun;
 403         mbox->pdev_info.ioctl_opcode = MYRS_IOCTL_XLATE_PDEV_TO_LDEV;
 404         sgl = &mbox->pdev_info.dma_addr;
 405         sgl->sge[0].sge_addr = devmap_addr;
 406         sgl->sge[0].sge_count = mbox->pdev_info.dma_size;
 407
 408         myrs_exec_cmd(cs, cmd_blk);
 409         status = cmd_blk->status;
 410         mutex_unlock(&cs->dcmd_mutex);
 411         dma_unmap_single(&pdev->dev, devmap_addr,
 412                          sizeof(struct myrs_devmap), DMA_FROM_DEVICE);
 413         return status;
 414 }
 415
 416 /*
 417  * myrs_get_event - executes a Get Event Command
 418  */
 419 static unsigned char myrs_get_event(struct myrs_hba *cs,
 420                 unsigned int event_num, struct myrs_event *event_buf)
 421 {
 422         struct pci_dev *pdev = cs->pdev;
 423         dma_addr_t event_addr;
 424         struct myrs_cmdblk *cmd_blk = &cs->mcmd_blk;
 425         union myrs_cmd_mbox *mbox = &cmd_blk->mbox;
 426         union myrs_sgl *sgl;
 427         unsigned char status;
 428
 429         event_addr = dma_map_single(&pdev->dev, event_buf,
 430                                     sizeof(struct myrs_event), DMA_FROM_DEVICE);
 431         if (dma_mapping_error(&pdev->dev, event_addr))
 432                 return MYRS_STATUS_FAILED;
 433
 434         mbox->get_event.opcode = MYRS_CMD_OP_IOCTL;
 435         mbox->get_event.dma_size = sizeof(struct myrs_event);
 436         mbox->get_event.evnum_upper = event_num >> 16;
 437         mbox->get_event.ctlr_num = 0;
 438         mbox->get_event.ioctl_opcode = MYRS_IOCTL_GET_EVENT;
 439         mbox->get_event.evnum_lower = event_num & 0xFFFF;
 440         sgl = &mbox->get_event.dma_addr;
 441         sgl->sge[0].sge_addr = event_addr;
 442         sgl->sge[0].sge_count = mbox->get_event.dma_size;
 443         myrs_exec_cmd(cs, cmd_blk);
 444         status = cmd_blk->status;
 445         dma_unmap_single(&pdev->dev, event_addr,
 446                          sizeof(struct myrs_event), DMA_FROM_DEVICE);
 447
 448         return status;
 449 }
 450
 451 /*
 452  * myrs_get_fwstatus - executes a Get Health Status Command
 453  */
 454 static unsigned char myrs_get_fwstatus(struct myrs_hba *cs)
 455 {
 456         struct myrs_cmdblk *cmd_blk = &cs->mcmd_blk;
 457         union myrs_cmd_mbox *mbox = &cmd_blk->mbox;
 458         union myrs_sgl *sgl;
 459         unsigned char status = cmd_blk->status;
 460
 461         myrs_reset_cmd(cmd_blk);
 462         mbox->common.opcode = MYRS_CMD_OP_IOCTL;
 463         mbox->common.id = MYRS_MCMD_TAG;
 464         mbox->common.control.dma_ctrl_to_host = true;
 465         mbox->common.control.no_autosense = true;
 466         mbox->common.dma_size = sizeof(struct myrs_fwstat);
 467         mbox->common.ioctl_opcode = MYRS_IOCTL_GET_HEALTH_STATUS;
 468         sgl = &mbox->common.dma_addr;
 469         sgl->sge[0].sge_addr = cs->fwstat_addr;
 470         sgl->sge[0].sge_count = mbox->ctlr_info.dma_size;
 471         dev_dbg(&cs->host->shost_gendev, "Sending GetHealthStatus\n");
 472         myrs_exec_cmd(cs, cmd_blk);
 473         status = cmd_blk->status;
 474
 475         return status;
 476 }
 477
 478 /*
 479  * myrs_enable_mmio_mbox - enables the Memory Mailbox Interface
 480  */
 481 static bool myrs_enable_mmio_mbox(struct myrs_hba *cs,
 482                 enable_mbox_t enable_mbox_fn)
 483 {
 484         void __iomem *base = cs->io_base;
 485         struct pci_dev *pdev = cs->pdev;
 486         union myrs_cmd_mbox *cmd_mbox;
 487         struct myrs_stat_mbox *stat_mbox;
 488         union myrs_cmd_mbox *mbox;
 489         dma_addr_t mbox_addr;
 490         unsigned char status = MYRS_STATUS_FAILED;
 491
 492         if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
 493                 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
 494                         dev_err(&pdev->dev, "DMA mask out of range\n");
 495                         return false;
 496                 }
 497
 498         /* Temporary dma mapping, used only in the scope of this function */
 499         mbox = dma_alloc_coherent(&pdev->dev, sizeof(union myrs_cmd_mbox),
 500                                   &mbox_addr, GFP_KERNEL);
 501         if (dma_mapping_error(&pdev->dev, mbox_addr))
 502                 return false;
 503
 504         /* These are the base addresses for the command memory mailbox array */
 505         cs->cmd_mbox_size = MYRS_MAX_CMD_MBOX * sizeof(union myrs_cmd_mbox);
 506         cmd_mbox = dma_alloc_coherent(&pdev->dev, cs->cmd_mbox_size,
 507                                       &cs->cmd_mbox_addr, GFP_KERNEL);
 508         if (dma_mapping_error(&pdev->dev, cs->cmd_mbox_addr)) {
 509                 dev_err(&pdev->dev, "Failed to map command mailbox\n");
 510                 goto out_free;
 511         }
 512         cs->first_cmd_mbox = cmd_mbox;
 513         cmd_mbox += MYRS_MAX_CMD_MBOX - 1;
 514         cs->last_cmd_mbox = cmd_mbox;
 515         cs->next_cmd_mbox = cs->first_cmd_mbox;
 516         cs->prev_cmd_mbox1 = cs->last_cmd_mbox;
 517         cs->prev_cmd_mbox2 = cs->last_cmd_mbox - 1;
 518
 519         /* These are the base addresses for the status memory mailbox array */
 520         cs->stat_mbox_size = MYRS_MAX_STAT_MBOX * sizeof(struct myrs_stat_mbox);
 521         stat_mbox = dma_alloc_coherent(&pdev->dev, cs->stat_mbox_size,
 522                                        &cs->stat_mbox_addr, GFP_KERNEL);
 523         if (dma_mapping_error(&pdev->dev, cs->stat_mbox_addr)) {
 524                 dev_err(&pdev->dev, "Failed to map status mailbox\n");
 525                 goto out_free;
 526         }
 527
 528         cs->first_stat_mbox = stat_mbox;
 529         stat_mbox += MYRS_MAX_STAT_MBOX - 1;
 530         cs->last_stat_mbox = stat_mbox;
 531         cs->next_stat_mbox = cs->first_stat_mbox;
 532
 533         cs->fwstat_buf = dma_alloc_coherent(&pdev->dev,
 534                                             sizeof(struct myrs_fwstat),
 535                                             &cs->fwstat_addr, GFP_KERNEL);
 536         if (dma_mapping_error(&pdev->dev, cs->fwstat_addr)) {
 537                 dev_err(&pdev->dev, "Failed to map firmware health buffer\n");
 538                 cs->fwstat_buf = NULL;
 539                 goto out_free;
 540         }
 541         cs->ctlr_info = kzalloc(sizeof(struct myrs_ctlr_info),
 542                                 GFP_KERNEL | GFP_DMA);
 543         if (!cs->ctlr_info)
 544                 goto out_free;
 545
 546         cs->event_buf = kzalloc(sizeof(struct myrs_event),
 547                                 GFP_KERNEL | GFP_DMA);
 548         if (!cs->event_buf)
 549                 goto out_free;
 550
 551         /* Enable the Memory Mailbox Interface. */
 552         memset(mbox, 0, sizeof(union myrs_cmd_mbox));
 553         mbox->set_mbox.id = 1;
 554         mbox->set_mbox.opcode = MYRS_CMD_OP_IOCTL;
 555         mbox->set_mbox.control.no_autosense = true;
 556         mbox->set_mbox.first_cmd_mbox_size_kb =
 557                 (MYRS_MAX_CMD_MBOX * sizeof(union myrs_cmd_mbox)) >> 10;
 558         mbox->set_mbox.first_stat_mbox_size_kb =
 559                 (MYRS_MAX_STAT_MBOX * sizeof(struct myrs_stat_mbox)) >> 10;
 560         mbox->set_mbox.second_cmd_mbox_size_kb = 0;
 561         mbox->set_mbox.second_stat_mbox_size_kb = 0;
 562         mbox->set_mbox.sense_len = 0;
 563         mbox->set_mbox.ioctl_opcode = MYRS_IOCTL_SET_MEM_MBOX;
 564         mbox->set_mbox.fwstat_buf_size_kb = 1;
 565         mbox->set_mbox.fwstat_buf_addr = cs->fwstat_addr;
 566         mbox->set_mbox.first_cmd_mbox_addr = cs->cmd_mbox_addr;
 567         mbox->set_mbox.first_stat_mbox_addr = cs->stat_mbox_addr;
 568         status = enable_mbox_fn(base, mbox_addr);
 569
 570 out_free:
 571         dma_free_coherent(&pdev->dev, sizeof(union myrs_cmd_mbox),
 572                           mbox, mbox_addr);
 573         if (status != MYRS_STATUS_SUCCESS)
 574                 dev_err(&pdev->dev, "Failed to enable mailbox, status %X\n",
 575                         status);
 576         return (status == MYRS_STATUS_SUCCESS);
 577 }
 578
 579 /*
 580  * myrs_get_config - reads the Configuration Information
 581  */
 582 static int myrs_get_config(struct myrs_hba *cs)
 583 {
 584         struct myrs_ctlr_info *info = cs->ctlr_info;
 585         struct Scsi_Host *shost = cs->host;
 586         unsigned char status;
 587         unsigned char model[20];
 588         unsigned char fw_version[12];
 589         int i, model_len;
 590
 591         /* Get data into dma-able area, then copy into permanent location */
 592         mutex_lock(&cs->cinfo_mutex);
 593         status = myrs_get_ctlr_info(cs);
 594         mutex_unlock(&cs->cinfo_mutex);
 595         if (status != MYRS_STATUS_SUCCESS) {
 596                 shost_printk(KERN_ERR, shost,
 597                              "Failed to get controller information\n");
 598                 return -ENODEV;
 599         }
 600
 601         /* Initialize the Controller Model Name and Full Model Name fields. */
 602         model_len = sizeof(info->ctlr_name);
 603         if (model_len > sizeof(model)-1)
 604                 model_len = sizeof(model)-1;
 605         memcpy(model, info->ctlr_name, model_len);
 606         model_len--;
 607         while (model[model_len] == ' ' || model[model_len] == '\0')
 608                 model_len--;
 609         model[++model_len] = '\0';
 610         strcpy(cs->model_name, "DAC960 ");
 611         strcat(cs->model_name, model);
 612         /* Initialize the Controller Firmware Version field. */
 613         sprintf(fw_version, "%d.%02d-%02d",
 614                 info->fw_major_version, info->fw_minor_version,
 615                 info->fw_turn_number);
 616         if (info->fw_major_version == 6 &&
 617             info->fw_minor_version == 0 &&
 618             info->fw_turn_number < 1) {
 619                 shost_printk(KERN_WARNING, shost,
 620                         "FIRMWARE VERSION %s DOES NOT PROVIDE THE CONTROLLER\n"
 621                         "STATUS MONITORING FUNCTIONALITY NEEDED BY THIS DRIVER.\n"
 622                         "PLEASE UPGRADE TO VERSION 6.00-01 OR ABOVE.\n",
 623                         fw_version);
 624                 return -ENODEV;
 625         }
 626         /* Initialize the Controller Channels and Targets. */
 627         shost->max_channel = info->physchan_present + info->virtchan_present;
 628         shost->max_id = info->max_targets[0];
 629         for (i = 1; i < 16; i++) {
 630                 if (!info->max_targets[i])
 631                         continue;
 632                 if (shost->max_id < info->max_targets[i])
 633                         shost->max_id = info->max_targets[i];
 634         }
 635
 636         /*
 637          * Initialize the Controller Queue Depth, Driver Queue Depth,
 638          * Logical Drive Count, Maximum Blocks per Command, Controller
 639          * Scatter/Gather Limit, and Driver Scatter/Gather Limit.
 640          * The Driver Queue Depth must be at most three less than
 641          * the Controller Queue Depth; tag '1' is reserved for
 642          * direct commands, and tag '2' for monitoring commands.
 643          */
 644         shost->can_queue = info->max_tcq - 3;
 645         if (shost->can_queue > MYRS_MAX_CMD_MBOX - 3)
 646                 shost->can_queue = MYRS_MAX_CMD_MBOX - 3;
 647         shost->max_sectors = info->max_transfer_size;
 648         shost->sg_tablesize = info->max_sge;
 649         if (shost->sg_tablesize > MYRS_SG_LIMIT)
 650                 shost->sg_tablesize = MYRS_SG_LIMIT;
 651
 652         shost_printk(KERN_INFO, shost,
 653                 "Configuring %s PCI RAID Controller\n", model);
 654         shost_printk(KERN_INFO, shost,
 655                 "  Firmware Version: %s, Channels: %d, Memory Size: %dMB\n",
 656                 fw_version, info->physchan_present, info->mem_size_mb);
 657
 658         shost_printk(KERN_INFO, shost,
 659                      "  Controller Queue Depth: %d, Maximum Blocks per Command: %d\n",
 660                      shost->can_queue, shost->max_sectors);
 661
 662         shost_printk(KERN_INFO, shost,
 663                      "  Driver Queue Depth: %d, Scatter/Gather Limit: %d of %d Segments\n",
 664                      shost->can_queue, shost->sg_tablesize, MYRS_SG_LIMIT);
 665         for (i = 0; i < info->physchan_max; i++) {
 666                 if (!info->max_targets[i])
 667                         continue;
 668                 shost_printk(KERN_INFO, shost,
 669                              "  Device Channel %d: max %d devices\n",
 670                              i, info->max_targets[i]);
 671         }
 672         shost_printk(KERN_INFO, shost,
 673                      "  Physical: %d/%d channels, %d disks, %d devices\n",
 674                      info->physchan_present, info->physchan_max,
 675                      info->pdisk_present, info->pdev_present);
 676
 677         shost_printk(KERN_INFO, shost,
 678                      "  Logical: %d/%d channels, %d disks\n",
 679                      info->virtchan_present, info->virtchan_max,
 680                      info->ldev_present);
 681         return 0;
 682 }
 683
 684 /*
 685  * myrs_log_event - prints a Controller Event message
 686  */
 687 static struct {
 688         int ev_code;
 689         unsigned char *ev_msg;
 690 } myrs_ev_list[] = {
 691         /* Physical Device Events (0x0000 - 0x007F) */
 692         { 0x0001, "P Online" },
 693         { 0x0002, "P Standby" },
 694         { 0x0005, "P Automatic Rebuild Started" },
 695         { 0x0006, "P Manual Rebuild Started" },
 696         { 0x0007, "P Rebuild Completed" },
 697         { 0x0008, "P Rebuild Cancelled" },
 698         { 0x0009, "P Rebuild Failed for Unknown Reasons" },
 699         { 0x000A, "P Rebuild Failed due to New Physical Device" },
 700         { 0x000B, "P Rebuild Failed due to Logical Drive Failure" },
 701         { 0x000C, "S Offline" },
 702         { 0x000D, "P Found" },
 703         { 0x000E, "P Removed" },
 704         { 0x000F, "P Unconfigured" },
 705         { 0x0010, "P Expand Capacity Started" },
 706         { 0x0011, "P Expand Capacity Completed" },
 707         { 0x0012, "P Expand Capacity Failed" },
 708         { 0x0013, "P Command Timed Out" },
 709         { 0x0014, "P Command Aborted" },
 710         { 0x0015, "P Command Retried" },
 711         { 0x0016, "P Parity Error" },
 712         { 0x0017, "P Soft Error" },
 713         { 0x0018, "P Miscellaneous Error" },
 714         { 0x0019, "P Reset" },
 715         { 0x001A, "P Active Spare Found" },
 716         { 0x001B, "P Warm Spare Found" },
 717         { 0x001C, "S Sense Data Received" },
 718         { 0x001D, "P Initialization Started" },
 719         { 0x001E, "P Initialization Completed" },
 720         { 0x001F, "P Initialization Failed" },
 721         { 0x0020, "P Initialization Cancelled" },
 722         { 0x0021, "P Failed because Write Recovery Failed" },
 723         { 0x0022, "P Failed because SCSI Bus Reset Failed" },
 724         { 0x0023, "P Failed because of Double Check Condition" },
 725         { 0x0024, "P Failed because Device Cannot Be Accessed" },
 726         { 0x0025, "P Failed because of Gross Error on SCSI Processor" },
 727         { 0x0026, "P Failed because of Bad Tag from Device" },
 728         { 0x0027, "P Failed because of Command Timeout" },
 729         { 0x0028, "P Failed because of System Reset" },
 730         { 0x0029, "P Failed because of Busy Status or Parity Error" },
 731         { 0x002A, "P Failed because Host Set Device to Failed State" },
 732         { 0x002B, "P Failed because of Selection Timeout" },
 733         { 0x002C, "P Failed because of SCSI Bus Phase Error" },
 734         { 0x002D, "P Failed because Device Returned Unknown Status" },
 735         { 0x002E, "P Failed because Device Not Ready" },
 736         { 0x002F, "P Failed because Device Not Found at Startup" },
 737         { 0x0030, "P Failed because COD Write Operation Failed" },
 738         { 0x0031, "P Failed because BDT Write Operation Failed" },
 739         { 0x0039, "P Missing at Startup" },
 740         { 0x003A, "P Start Rebuild Failed due to Physical Drive Too Small" },
 741         { 0x003C, "P Temporarily Offline Device Automatically Made Online" },
 742         { 0x003D, "P Standby Rebuild Started" },
 743         /* Logical Device Events (0x0080 - 0x00FF) */
 744         { 0x0080, "M Consistency Check Started" },
 745         { 0x0081, "M Consistency Check Completed" },
 746         { 0x0082, "M Consistency Check Cancelled" },
 747         { 0x0083, "M Consistency Check Completed With Errors" },
 748         { 0x0084, "M Consistency Check Failed due to Logical Drive Failure" },
 749         { 0x0085, "M Consistency Check Failed due to Physical Device Failure" },
 750         { 0x0086, "L Offline" },
 751         { 0x0087, "L Critical" },
 752         { 0x0088, "L Online" },
 753         { 0x0089, "M Automatic Rebuild Started" },
 754         { 0x008A, "M Manual Rebuild Started" },
 755         { 0x008B, "M Rebuild Completed" },
 756         { 0x008C, "M Rebuild Cancelled" },
 757         { 0x008D, "M Rebuild Failed for Unknown Reasons" },
 758         { 0x008E, "M Rebuild Failed due to New Physical Device" },
 759         { 0x008F, "M Rebuild Failed due to Logical Drive Failure" },
 760         { 0x0090, "M Initialization Started" },
 761         { 0x0091, "M Initialization Completed" },
 762         { 0x0092, "M Initialization Cancelled" },
 763         { 0x0093, "M Initialization Failed" },
 764         { 0x0094, "L Found" },
 765         { 0x0095, "L Deleted" },
 766         { 0x0096, "M Expand Capacity Started" },
 767         { 0x0097, "M Expand Capacity Completed" },
 768         { 0x0098, "M Expand Capacity Failed" },
 769         { 0x0099, "L Bad Block Found" },
 770         { 0x009A, "L Size Changed" },
 771         { 0x009B, "L Type Changed" },
 772         { 0x009C, "L Bad Data Block Found" },
 773         { 0x009E, "L Read of Data Block in BDT" },
 774         { 0x009F, "L Write Back Data for Disk Block Lost" },
 775         { 0x00A0, "L Temporarily Offline RAID-5/3 Drive Made Online" },
 776         { 0x00A1, "L Temporarily Offline RAID-6/1/0/7 Drive Made Online" },
 777         { 0x00A2, "L Standby Rebuild Started" },
 778         /* Fault Management Events (0x0100 - 0x017F) */
 779         { 0x0140, "E Fan %d Failed" },
 780         { 0x0141, "E Fan %d OK" },
 781         { 0x0142, "E Fan %d Not Present" },
 782         { 0x0143, "E Power Supply %d Failed" },
 783         { 0x0144, "E Power Supply %d OK" },
 784         { 0x0145, "E Power Supply %d Not Present" },
 785         { 0x0146, "E Temperature Sensor %d Temperature Exceeds Safe Limit" },
 786         { 0x0147, "E Temperature Sensor %d Temperature Exceeds Working Limit" },
 787         { 0x0148, "E Temperature Sensor %d Temperature Normal" },
 788         { 0x0149, "E Temperature Sensor %d Not Present" },
 789         { 0x014A, "E Enclosure Management Unit %d Access Critical" },
 790         { 0x014B, "E Enclosure Management Unit %d Access OK" },
 791         { 0x014C, "E Enclosure Management Unit %d Access Offline" },
 792         /* Controller Events (0x0180 - 0x01FF) */
 793         { 0x0181, "C Cache Write Back Error" },
 794         { 0x0188, "C Battery Backup Unit Found" },
 795         { 0x0189, "C Battery Backup Unit Charge Level Low" },
 796         { 0x018A, "C Battery Backup Unit Charge Level OK" },
 797         { 0x0193, "C Installation Aborted" },
 798         { 0x0195, "C Battery Backup Unit Physically Removed" },
 799         { 0x0196, "C Memory Error During Warm Boot" },
 800         { 0x019E, "C Memory Soft ECC Error Corrected" },
 801         { 0x019F, "C Memory Hard ECC Error Corrected" },
 802         { 0x01A2, "C Battery Backup Unit Failed" },
 803         { 0x01AB, "C Mirror Race Recovery Failed" },
 804         { 0x01AC, "C Mirror Race on Critical Drive" },
 805         /* Controller Internal Processor Events */
 806         { 0x0380, "C Internal Controller Hung" },
 807         { 0x0381, "C Internal Controller Firmware Breakpoint" },
 808         { 0x0390, "C Internal Controller i960 Processor Specific Error" },
 809         { 0x03A0, "C Internal Controller StrongARM Processor Specific Error" },
 810         { 0, "" }
 811 };
 812
 813 static void myrs_log_event(struct myrs_hba *cs, struct myrs_event *ev)
 814 {
 815         unsigned char msg_buf[MYRS_LINE_BUFFER_SIZE];
 816         int ev_idx = 0, ev_code;
 817         unsigned char ev_type, *ev_msg;
 818         struct Scsi_Host *shost = cs->host;
 819         struct scsi_device *sdev;
 820         struct scsi_sense_hdr sshdr = {0};
 821         unsigned char sense_info[4];
 822         unsigned char cmd_specific[4];
 823
 824         if (ev->ev_code == 0x1C) {
 825                 if (!scsi_normalize_sense(ev->sense_data, 40, &sshdr)) {
 826                         memset(&sshdr, 0x0, sizeof(sshdr));
 827                         memset(sense_info, 0x0, sizeof(sense_info));
 828                         memset(cmd_specific, 0x0, sizeof(cmd_specific));
 829                 } else {
 830                         memcpy(sense_info, &ev->sense_data[3], 4);
 831                         memcpy(cmd_specific, &ev->sense_data[7], 4);
 832                 }
 833         }
 834         if (sshdr.sense_key == VENDOR_SPECIFIC &&
 835             (sshdr.asc == 0x80 || sshdr.asc == 0x81))
 836                 ev->ev_code = ((sshdr.asc - 0x80) << 8 | sshdr.ascq);
 837         while (true) {
 838                 ev_code = myrs_ev_list[ev_idx].ev_code;
 839                 if (ev_code == ev->ev_code || ev_code == 0)
 840                         break;
 841                 ev_idx++;
 842         }
 843         ev_type = myrs_ev_list[ev_idx].ev_msg[0];
 844         ev_msg = &myrs_ev_list[ev_idx].ev_msg[2];
 845         if (ev_code == 0) {
 846                 shost_printk(KERN_WARNING, shost,
 847                              "Unknown Controller Event Code %04X\n",
 848                              ev->ev_code);
 849                 return;
 850         }
 851         switch (ev_type) {
 852         case 'P':
 853                 sdev = scsi_device_lookup(shost, ev->channel,
 854                                           ev->target, 0);
 855                 sdev_printk(KERN_INFO, sdev, "event %d: Physical Device %s\n",
 856                             ev->ev_seq, ev_msg);
 857                 if (sdev && sdev->hostdata &&
 858                     sdev->channel < cs->ctlr_info->physchan_present) {
 859                         struct myrs_pdev_info *pdev_info = sdev->hostdata;
 860
 861                         switch (ev->ev_code) {
 862                         case 0x0001:
 863                         case 0x0007:
 864                                 pdev_info->dev_state = MYRS_DEVICE_ONLINE;
 865                                 break;
 866                         case 0x0002:
 867                                 pdev_info->dev_state = MYRS_DEVICE_STANDBY;
 868                                 break;
 869                         case 0x000C:
 870                                 pdev_info->dev_state = MYRS_DEVICE_OFFLINE;
 871                                 break;
 872                         case 0x000E:
 873                                 pdev_info->dev_state = MYRS_DEVICE_MISSING;
 874                                 break;
 875                         case 0x000F:
 876                                 pdev_info->dev_state = MYRS_DEVICE_UNCONFIGURED;
 877                                 break;
 878                         }
 879                 }
 880                 break;
 881         case 'L':
 882                 shost_printk(KERN_INFO, shost,
 883                              "event %d: Logical Drive %d %s\n",
 884                              ev->ev_seq, ev->lun, ev_msg);
 885                 cs->needs_update = true;
 886                 break;
 887         case 'M':
 888                 shost_printk(KERN_INFO, shost,
 889                              "event %d: Logical Drive %d %s\n",
 890                              ev->ev_seq, ev->lun, ev_msg);
 891                 cs->needs_update = true;
 892                 break;
 893         case 'S':
 894                 if (sshdr.sense_key == NO_SENSE ||
 895                     (sshdr.sense_key == NOT_READY &&
 896                      sshdr.asc == 0x04 && (sshdr.ascq == 0x01 ||
 897                                             sshdr.ascq == 0x02)))
 898                         break;
 899                 shost_printk(KERN_INFO, shost,
 900                              "event %d: Physical Device %d:%d %s\n",
 901                              ev->ev_seq, ev->channel, ev->target, ev_msg);
 902                 shost_printk(KERN_INFO, shost,
 903                              "Physical Device %d:%d Sense Key = %X, ASC = %02X, ASCQ = %02X\n",
 904                              ev->channel, ev->target,
 905                              sshdr.sense_key, sshdr.asc, sshdr.ascq);
 906                 shost_printk(KERN_INFO, shost,
 907                              "Physical Device %d:%d Sense Information = %02X%02X%02X%02X %02X%02X%02X%02X\n",
 908                              ev->channel, ev->target,
 909                              sense_info[0], sense_info[1],
 910                              sense_info[2], sense_info[3],
 911                              cmd_specific[0], cmd_specific[1],
 912                              cmd_specific[2], cmd_specific[3]);
 913                 break;
 914         case 'E':
 915                 if (cs->disable_enc_msg)
 916                         break;
 917                 sprintf(msg_buf, ev_msg, ev->lun);
 918                 shost_printk(KERN_INFO, shost, "event %d: Enclosure %d %s\n",
 919                              ev->ev_seq, ev->target, msg_buf);
 920                 break;
 921         case 'C':
 922                 shost_printk(KERN_INFO, shost, "event %d: Controller %s\n",
 923                              ev->ev_seq, ev_msg);
 924                 break;
 925         default:
 926                 shost_printk(KERN_INFO, shost,
 927                              "event %d: Unknown Event Code %04X\n",
 928                              ev->ev_seq, ev->ev_code);
 929                 break;
 930         }
 931 }
 932
 933 /*
 934  * SCSI sysfs interface functions
 935  */
 936 static ssize_t raid_state_show(struct device *dev,
 937                 struct device_attribute *attr, char *buf)
 938 {
 939         struct scsi_device *sdev = to_scsi_device(dev);
 940         struct myrs_hba *cs = shost_priv(sdev->host);
 941         int ret;
 942
 943         if (!sdev->hostdata)
 944                 return snprintf(buf, 16, "Unknown\n");
 945
 946         if (sdev->channel >= cs->ctlr_info->physchan_present) {
 947                 struct myrs_ldev_info *ldev_info = sdev->hostdata;
 948                 const char *name;
 949
 950                 name = myrs_devstate_name(ldev_info->dev_state);
 951                 if (name)
 952                         ret = snprintf(buf, 32, "%s\n", name);
 953                 else
 954                         ret = snprintf(buf, 32, "Invalid (%02X)\n",
 955                                        ldev_info->dev_state);
 956         } else {
 957                 struct myrs_pdev_info *pdev_info;
 958                 const char *name;
 959
 960                 pdev_info = sdev->hostdata;
 961                 name = myrs_devstate_name(pdev_info->dev_state);
 962                 if (name)
 963                         ret = snprintf(buf, 32, "%s\n", name);
 964                 else
 965                         ret = snprintf(buf, 32, "Invalid (%02X)\n",
 966                                        pdev_info->dev_state);
 967         }
 968         return ret;
 969 }
 970
 971 static ssize_t raid_state_store(struct device *dev,
 972                 struct device_attribute *attr, const char *buf, size_t count)
 973 {
 974         struct scsi_device *sdev = to_scsi_device(dev);
 975         struct myrs_hba *cs = shost_priv(sdev->host);
 976         struct myrs_cmdblk *cmd_blk;
 977         union myrs_cmd_mbox *mbox;
 978         enum myrs_devstate new_state;
 979         unsigned short ldev_num;
 980         unsigned char status;
 981
 982         if (!strncmp(buf, "offline", 7) ||
 983             !strncmp(buf, "kill", 4))
 984                 new_state = MYRS_DEVICE_OFFLINE;
 985         else if (!strncmp(buf, "online", 6))
 986                 new_state = MYRS_DEVICE_ONLINE;
 987         else if (!strncmp(buf, "standby", 7))
 988                 new_state = MYRS_DEVICE_STANDBY;
 989         else
 990                 return -EINVAL;
 991
 992         if (sdev->channel < cs->ctlr_info->physchan_present) {
 993                 struct myrs_pdev_info *pdev_info = sdev->hostdata;
 994                 struct myrs_devmap *pdev_devmap =
 995                         (struct myrs_devmap *)&pdev_info->rsvd13;
 996
 997                 if (pdev_info->dev_state == new_state) {
 998                         sdev_printk(KERN_INFO, sdev,
 999                                     "Device already in %s\n",
1000                                     myrs_devstate_name(new_state));
1001                         return count;
1002                 }
1003                 status = myrs_translate_pdev(cs, sdev->channel, sdev->id,
1004                                              sdev->lun, pdev_devmap);
1005                 if (status != MYRS_STATUS_SUCCESS)
1006                         return -ENXIO;
1007                 ldev_num = pdev_devmap->ldev_num;
1008         } else {
1009                 struct myrs_ldev_info *ldev_info = sdev->hostdata;
1010
1011                 if (ldev_info->dev_state == new_state) {
1012                         sdev_printk(KERN_INFO, sdev,
1013                                     "Device already in %s\n",
1014                                     myrs_devstate_name(new_state));
1015                         return count;
1016                 }
1017                 ldev_num = ldev_info->ldev_num;
1018         }
1019         mutex_lock(&cs->dcmd_mutex);
1020         cmd_blk = &cs->dcmd_blk;
1021         myrs_reset_cmd(cmd_blk);
1022         mbox = &cmd_blk->mbox;
1023         mbox->common.opcode = MYRS_CMD_OP_IOCTL;
1024         mbox->common.id = MYRS_DCMD_TAG;
1025         mbox->common.control.dma_ctrl_to_host = true;
1026         mbox->common.control.no_autosense = true;
1027         mbox->set_devstate.ioctl_opcode = MYRS_IOCTL_SET_DEVICE_STATE;
1028         mbox->set_devstate.state = new_state;
1029         mbox->set_devstate.ldev.ldev_num = ldev_num;
1030         myrs_exec_cmd(cs, cmd_blk);
1031         status = cmd_blk->status;
1032         mutex_unlock(&cs->dcmd_mutex);
1033         if (status == MYRS_STATUS_SUCCESS) {
1034                 if (sdev->channel < cs->ctlr_info->physchan_present) {
1035                         struct myrs_pdev_info *pdev_info = sdev->hostdata;
1036
1037                         pdev_info->dev_state = new_state;
1038                 } else {
1039                         struct myrs_ldev_info *ldev_info = sdev->hostdata;
1040
1041                         ldev_info->dev_state = new_state;
1042                 }
1043                 sdev_printk(KERN_INFO, sdev,
1044                             "Set device state to %s\n",
1045                             myrs_devstate_name(new_state));
1046                 return count;
1047         }
1048         sdev_printk(KERN_INFO, sdev,
1049                     "Failed to set device state to %s, status 0x%02x\n",
1050                     myrs_devstate_name(new_state), status);
1051         return -EINVAL;
1052 }
1053 static DEVICE_ATTR_RW(raid_state);
1054
1055 static ssize_t raid_level_show(struct device *dev,
1056                 struct device_attribute *attr, char *buf)
1057 {
1058         struct scsi_device *sdev = to_scsi_device(dev);
1059         struct myrs_hba *cs = shost_priv(sdev->host);
1060         const char *name = NULL;
1061
1062         if (!sdev->hostdata)
1063                 return snprintf(buf, 16, "Unknown\n");
1064
1065         if (sdev->channel >= cs->ctlr_info->physchan_present) {
1066                 struct myrs_ldev_info *ldev_info;
1067
1068                 ldev_info = sdev->hostdata;
1069                 name = myrs_raid_level_name(ldev_info->raid_level);
1070                 if (!name)
1071                         return snprintf(buf, 32, "Invalid (%02X)\n",
1072                                         ldev_info->dev_state);
1073
1074         } else
1075                 name = myrs_raid_level_name(MYRS_RAID_PHYSICAL);
1076
1077         return snprintf(buf, 32, "%s\n", name);
1078 }
1079 static DEVICE_ATTR_RO(raid_level);
1080
1081 static ssize_t rebuild_show(struct device *dev,
1082                 struct device_attribute *attr, char *buf)
1083 {
1084         struct scsi_device *sdev = to_scsi_device(dev);
1085         struct myrs_hba *cs = shost_priv(sdev->host);
1086         struct myrs_ldev_info *ldev_info;
1087         unsigned short ldev_num;
1088         unsigned char status;
1089
1090         if (sdev->channel < cs->ctlr_info->physchan_present)
1091                 return snprintf(buf, 32, "physical device - not rebuilding\n");
1092
1093         ldev_info = sdev->hostdata;
1094         ldev_num = ldev_info->ldev_num;
1095         status = myrs_get_ldev_info(cs, ldev_num, ldev_info);
1096         if (status != MYRS_STATUS_SUCCESS) {
1097                 sdev_printk(KERN_INFO, sdev,
1098                             "Failed to get device information, status 0x%02x\n",
1099                             status);
1100                 return -EIO;
1101         }
1102         if (ldev_info->rbld_active) {
1103                 return snprintf(buf, 32, "rebuilding block %zu of %zu\n",
1104                                 (size_t)ldev_info->rbld_lba,
1105                                 (size_t)ldev_info->cfg_devsize);
1106         } else
1107                 return snprintf(buf, 32, "not rebuilding\n");
1108 }
1109
1110 static ssize_t rebuild_store(struct device *dev,
1111                 struct device_attribute *attr, const char *buf, size_t count)
1112 {
1113         struct scsi_device *sdev = to_scsi_device(dev);
1114         struct myrs_hba *cs = shost_priv(sdev->host);
1115         struct myrs_ldev_info *ldev_info;
1116         struct myrs_cmdblk *cmd_blk;
1117         union myrs_cmd_mbox *mbox;
1118         unsigned short ldev_num;
1119         unsigned char status;
1120         int rebuild, ret;
1121
1122         if (sdev->channel < cs->ctlr_info->physchan_present)
1123                 return -EINVAL;
1124
1125         ldev_info = sdev->hostdata;
1126         if (!ldev_info)
1127                 return -ENXIO;
1128         ldev_num = ldev_info->ldev_num;
1129
1130         ret = kstrtoint(buf, 0, &rebuild);
1131         if (ret)
1132                 return ret;
1133
1134         status = myrs_get_ldev_info(cs, ldev_num, ldev_info);
1135         if (status != MYRS_STATUS_SUCCESS) {
1136                 sdev_printk(KERN_INFO, sdev,
1137                             "Failed to get device information, status 0x%02x\n",
1138                             status);
1139                 return -EIO;
1140         }
1141
1142         if (rebuild && ldev_info->rbld_active) {
1143                 sdev_printk(KERN_INFO, sdev,
1144                             "Rebuild Not Initiated; already in progress\n");
1145                 return -EALREADY;
1146         }
1147         if (!rebuild && !ldev_info->rbld_active) {
1148                 sdev_printk(KERN_INFO, sdev,
1149                             "Rebuild Not Cancelled; no rebuild in progress\n");
1150                 return count;
1151         }
1152
1153         mutex_lock(&cs->dcmd_mutex);
1154         cmd_blk = &cs->dcmd_blk;
1155         myrs_reset_cmd(cmd_blk);
1156         mbox = &cmd_blk->mbox;
1157         mbox->common.opcode = MYRS_CMD_OP_IOCTL;
1158         mbox->common.id = MYRS_DCMD_TAG;
1159         mbox->common.control.dma_ctrl_to_host = true;
1160         mbox->common.control.no_autosense = true;
1161         if (rebuild) {
1162                 mbox->ldev_info.ldev.ldev_num = ldev_num;
1163                 mbox->ldev_info.ioctl_opcode = MYRS_IOCTL_RBLD_DEVICE_START;
1164         } else {
1165                 mbox->ldev_info.ldev.ldev_num = ldev_num;
1166                 mbox->ldev_info.ioctl_opcode = MYRS_IOCTL_RBLD_DEVICE_STOP;
1167         }
1168         myrs_exec_cmd(cs, cmd_blk);
1169         status = cmd_blk->status;
1170         mutex_unlock(&cs->dcmd_mutex);
1171         if (status) {
1172                 sdev_printk(KERN_INFO, sdev,
1173                             "Rebuild Not %s, status 0x%02x\n",
1174                             rebuild ? "Initiated" : "Cancelled", status);
1175                 ret = -EIO;
1176         } else {
1177                 sdev_printk(KERN_INFO, sdev, "Rebuild %s\n",
1178                             rebuild ? "Initiated" : "Cancelled");
1179                 ret = count;
1180         }
1181
1182         return ret;
1183 }
1184 static DEVICE_ATTR_RW(rebuild);
1185
1186 static ssize_t consistency_check_show(struct device *dev,
1187                 struct device_attribute *attr, char *buf)
1188 {
1189         struct scsi_device *sdev = to_scsi_device(dev);
1190         struct myrs_hba *cs = shost_priv(sdev->host);
1191         struct myrs_ldev_info *ldev_info;
1192         unsigned short ldev_num;
1193
1194         if (sdev->channel < cs->ctlr_info->physchan_present)
1195                 return snprintf(buf, 32, "physical device - not checking\n");
1196
1197         ldev_info = sdev->hostdata;
1198         if (!ldev_info)
1199                 return -ENXIO;
1200         ldev_num = ldev_info->ldev_num;
1201         myrs_get_ldev_info(cs, ldev_num, ldev_info);
1202         if (ldev_info->cc_active)
1203                 return snprintf(buf, 32, "checking block %zu of %zu\n",
1204                                 (size_t)ldev_info->cc_lba,
1205                                 (size_t)ldev_info->cfg_devsize);
1206         else
1207                 return snprintf(buf, 32, "not checking\n");
1208 }
1209
1210 static ssize_t consistency_check_store(struct device *dev,
1211                 struct device_attribute *attr, const char *buf, size_t count)
1212 {
1213         struct scsi_device *sdev = to_scsi_device(dev);
1214         struct myrs_hba *cs = shost_priv(sdev->host);
1215         struct myrs_ldev_info *ldev_info;
1216         struct myrs_cmdblk *cmd_blk;
1217         union myrs_cmd_mbox *mbox;
1218         unsigned short ldev_num;
1219         unsigned char status;
1220         int check, ret;
1221
1222         if (sdev->channel < cs->ctlr_info->physchan_present)
1223                 return -EINVAL;
1224
1225         ldev_info = sdev->hostdata;
1226         if (!ldev_info)
1227                 return -ENXIO;
1228         ldev_num = ldev_info->ldev_num;
1229
1230         ret = kstrtoint(buf, 0, &check);
1231         if (ret)
1232                 return ret;
1233
1234         status = myrs_get_ldev_info(cs, ldev_num, ldev_info);
1235         if (status != MYRS_STATUS_SUCCESS) {
1236                 sdev_printk(KERN_INFO, sdev,
1237                             "Failed to get device information, status 0x%02x\n",
1238                             status);
1239                 return -EIO;
1240         }
1241         if (check && ldev_info->cc_active) {
1242                 sdev_printk(KERN_INFO, sdev,
1243                             "Consistency Check Not Initiated; "
1244                             "already in progress\n");
1245                 return -EALREADY;
1246         }
1247         if (!check && !ldev_info->cc_active) {
1248                 sdev_printk(KERN_INFO, sdev,
1249                             "Consistency Check Not Cancelled; "
1250                             "check not in progress\n");
1251                 return count;
1252         }
1253
1254         mutex_lock(&cs->dcmd_mutex);
1255         cmd_blk = &cs->dcmd_blk;
1256         myrs_reset_cmd(cmd_blk);
1257         mbox = &cmd_blk->mbox;
1258         mbox->common.opcode = MYRS_CMD_OP_IOCTL;
1259         mbox->common.id = MYRS_DCMD_TAG;
1260         mbox->common.control.dma_ctrl_to_host = true;
1261         mbox->common.control.no_autosense = true;
1262         if (check) {
1263                 mbox->cc.ldev.ldev_num = ldev_num;
1264                 mbox->cc.ioctl_opcode = MYRS_IOCTL_CC_START;
1265                 mbox->cc.restore_consistency = true;
1266                 mbox->cc.initialized_area_only = false;
1267         } else {
1268                 mbox->cc.ldev.ldev_num = ldev_num;
1269                 mbox->cc.ioctl_opcode = MYRS_IOCTL_CC_STOP;
1270         }
1271         myrs_exec_cmd(cs, cmd_blk);
1272         status = cmd_blk->status;
1273         mutex_unlock(&cs->dcmd_mutex);
1274         if (status != MYRS_STATUS_SUCCESS) {
1275                 sdev_printk(KERN_INFO, sdev,
1276                             "Consistency Check Not %s, status 0x%02x\n",
1277                             check ? "Initiated" : "Cancelled", status);
1278                 ret = -EIO;
1279         } else {
1280                 sdev_printk(KERN_INFO, sdev, "Consistency Check %s\n",
1281                             check ? "Initiated" : "Cancelled");
1282                 ret = count;
1283         }
1284
1285         return ret;
1286 }
1287 static DEVICE_ATTR_RW(consistency_check);
1288
1289 static struct device_attribute *myrs_sdev_attrs[] = {
1290         &dev_attr_consistency_check,
1291         &dev_attr_rebuild,
1292         &dev_attr_raid_state,
1293         &dev_attr_raid_level,
1294         NULL,
1295 };
1296
1297 static ssize_t serial_show(struct device *dev,
1298                 struct device_attribute *attr, char *buf)
1299 {
1300         struct Scsi_Host *shost = class_to_shost(dev);
1301         struct myrs_hba *cs = shost_priv(shost);
1302         char serial[17];
1303
1304         memcpy(serial, cs->ctlr_info->serial_number, 16);
1305         serial[16] = '\0';
1306         return snprintf(buf, 16, "%s\n", serial);
1307 }
1308 static DEVICE_ATTR_RO(serial);
1309
1310 static ssize_t ctlr_num_show(struct device *dev,
1311                 struct device_attribute *attr, char *buf)
1312 {
1313         struct Scsi_Host *shost = class_to_shost(dev);
1314         struct myrs_hba *cs = shost_priv(shost);
1315
1316         return snprintf(buf, 20, "%d\n", cs->host->host_no);
1317 }
1318 static DEVICE_ATTR_RO(ctlr_num);
1319
1320 static struct myrs_cpu_type_tbl {
1321         enum myrs_cpu_type type;
1322         char *name;
1323 } myrs_cpu_type_names[] = {
1324         { MYRS_CPUTYPE_i960CA, "i960CA" },
1325         { MYRS_CPUTYPE_i960RD, "i960RD" },
1326         { MYRS_CPUTYPE_i960RN, "i960RN" },
1327         { MYRS_CPUTYPE_i960RP, "i960RP" },
1328         { MYRS_CPUTYPE_NorthBay, "NorthBay" },
1329         { MYRS_CPUTYPE_StrongArm, "StrongARM" },
1330         { MYRS_CPUTYPE_i960RM, "i960RM" },
1331 };
1332
1333 static ssize_t processor_show(struct device *dev,
1334                 struct device_attribute *attr, char *buf)
1335 {
1336         struct Scsi_Host *shost = class_to_shost(dev);
1337         struct myrs_hba *cs = shost_priv(shost);
1338         struct myrs_cpu_type_tbl *tbl;
1339         const char *first_processor = NULL;
1340         const char *second_processor = NULL;
1341         struct myrs_ctlr_info *info = cs->ctlr_info;
1342         ssize_t ret;
1343         int i;
1344
1345         if (info->cpu[0].cpu_count) {
1346                 tbl = myrs_cpu_type_names;
1347                 for (i = 0; i < ARRAY_SIZE(myrs_cpu_type_names); i++) {
1348                         if (tbl[i].type == info->cpu[0].cpu_type) {
1349                                 first_processor = tbl[i].name;
1350                                 break;
1351                         }
1352                 }
1353         }
1354         if (info->cpu[1].cpu_count) {
1355                 tbl = myrs_cpu_type_names;
1356                 for (i = 0; i < ARRAY_SIZE(myrs_cpu_type_names); i++) {
1357                         if (tbl[i].type == info->cpu[1].cpu_type) {
1358                                 second_processor = tbl[i].name;
1359                                 break;
1360                         }
1361                 }
1362         }
1363         if (first_processor && second_processor)
1364                 ret = snprintf(buf, 64, "1: %s (%s, %d cpus)\n"
1365                                "2: %s (%s, %d cpus)\n",
1366                                info->cpu[0].cpu_name,
1367                                first_processor, info->cpu[0].cpu_count,
1368                                info->cpu[1].cpu_name,
1369                                second_processor, info->cpu[1].cpu_count);
1370         else if (first_processor && !second_processor)
1371                 ret = snprintf(buf, 64, "1: %s (%s, %d cpus)\n2: absent\n",
1372                                info->cpu[0].cpu_name,
1373                                first_processor, info->cpu[0].cpu_count);
1374         else if (!first_processor && second_processor)
1375                 ret = snprintf(buf, 64, "1: absent\n2: %s (%s, %d cpus)\n",
1376                                info->cpu[1].cpu_name,
1377                                second_processor, info->cpu[1].cpu_count);
1378         else
1379                 ret = snprintf(buf, 64, "1: absent\n2: absent\n");
1380
1381         return ret;
1382 }
1383 static DEVICE_ATTR_RO(processor);
1384
1385 static ssize_t model_show(struct device *dev,
1386                 struct device_attribute *attr, char *buf)
1387 {
1388         struct Scsi_Host *shost = class_to_shost(dev);
1389         struct myrs_hba *cs = shost_priv(shost);
1390
1391         return snprintf(buf, 28, "%s\n", cs->model_name);
1392 }
1393 static DEVICE_ATTR_RO(model);
1394
1395 static ssize_t ctlr_type_show(struct device *dev,
1396                 struct device_attribute *attr, char *buf)
1397 {
1398         struct Scsi_Host *shost = class_to_shost(dev);
1399         struct myrs_hba *cs = shost_priv(shost);
1400
1401         return snprintf(buf, 4, "%d\n", cs->ctlr_info->ctlr_type);
1402 }
1403 static DEVICE_ATTR_RO(ctlr_type);
1404
1405 static ssize_t cache_size_show(struct device *dev,
1406                 struct device_attribute *attr, char *buf)
1407 {
1408         struct Scsi_Host *shost = class_to_shost(dev);
1409         struct myrs_hba *cs = shost_priv(shost);
1410
1411         return snprintf(buf, 8, "%d MB\n", cs->ctlr_info->cache_size_mb);
1412 }
1413 static DEVICE_ATTR_RO(cache_size);
1414
1415 static ssize_t firmware_show(struct device *dev,
1416                 struct device_attribute *attr, char *buf)
1417 {
1418         struct Scsi_Host *shost = class_to_shost(dev);
1419         struct myrs_hba *cs = shost_priv(shost);
1420
1421         return snprintf(buf, 16, "%d.%02d-%02d\n",
1422                         cs->ctlr_info->fw_major_version,
1423                         cs->ctlr_info->fw_minor_version,
1424                         cs->ctlr_info->fw_turn_number);
1425 }
1426 static DEVICE_ATTR_RO(firmware);
1427
1428 static ssize_t discovery_store(struct device *dev,
1429                 struct device_attribute *attr, const char *buf, size_t count)
1430 {
1431         struct Scsi_Host *shost = class_to_shost(dev);
1432         struct myrs_hba *cs = shost_priv(shost);
1433         struct myrs_cmdblk *cmd_blk;
1434         union myrs_cmd_mbox *mbox;
1435         unsigned char status;
1436
1437         mutex_lock(&cs->dcmd_mutex);
1438         cmd_blk = &cs->dcmd_blk;
1439         myrs_reset_cmd(cmd_blk);
1440         mbox = &cmd_blk->mbox;
1441         mbox->common.opcode = MYRS_CMD_OP_IOCTL;
1442         mbox->common.id = MYRS_DCMD_TAG;
1443         mbox->common.control.dma_ctrl_to_host = true;
1444         mbox->common.control.no_autosense = true;
1445         mbox->common.ioctl_opcode = MYRS_IOCTL_START_DISCOVERY;
1446         myrs_exec_cmd(cs, cmd_blk);
1447         status = cmd_blk->status;
1448         mutex_unlock(&cs->dcmd_mutex);
1449         if (status != MYRS_STATUS_SUCCESS) {
1450                 shost_printk(KERN_INFO, shost,
1451                              "Discovery Not Initiated, status %02X\n",
1452                              status);
1453                 return -EINVAL;
1454         }
1455         shost_printk(KERN_INFO, shost, "Discovery Initiated\n");
1456         cs->next_evseq = 0;
1457         cs->needs_update = true;
1458         queue_delayed_work(cs->work_q, &cs->monitor_work, 1);
1459         flush_delayed_work(&cs->monitor_work);
1460         shost_printk(KERN_INFO, shost, "Discovery Completed\n");
1461
1462         return count;
1463 }
1464 static DEVICE_ATTR_WO(discovery);
1465
1466 static ssize_t flush_cache_store(struct device *dev,
1467                 struct device_attribute *attr, const char *buf, size_t count)
1468 {
1469         struct Scsi_Host *shost = class_to_shost(dev);
1470         struct myrs_hba *cs = shost_priv(shost);
1471         unsigned char status;
1472
1473         status = myrs_dev_op(cs, MYRS_IOCTL_FLUSH_DEVICE_DATA,
1474                              MYRS_RAID_CONTROLLER);
1475         if (status == MYRS_STATUS_SUCCESS) {
1476                 shost_printk(KERN_INFO, shost, "Cache Flush Completed\n");
1477                 return count;
1478         }
1479         shost_printk(KERN_INFO, shost,
1480                      "Cache Flush failed, status 0x%02x\n", status);
1481         return -EIO;
1482 }
1483 static DEVICE_ATTR_WO(flush_cache);
1484
1485 static ssize_t disable_enclosure_messages_show(struct device *dev,
1486                 struct device_attribute *attr, char *buf)
1487 {
1488         struct Scsi_Host *shost = class_to_shost(dev);
1489         struct myrs_hba *cs = shost_priv(shost);
1490
1491         return snprintf(buf, 3, "%d\n", cs->disable_enc_msg);
1492 }
1493
1494 static ssize_t disable_enclosure_messages_store(struct device *dev,
1495                 struct device_attribute *attr, const char *buf, size_t count)
1496 {
1497         struct scsi_device *sdev = to_scsi_device(dev);
1498         struct myrs_hba *cs = shost_priv(sdev->host);
1499         int value, ret;
1500
1501         ret = kstrtoint(buf, 0, &value);
1502         if (ret)
1503                 return ret;
1504
1505         if (value > 2)
1506                 return -EINVAL;
1507
1508         cs->disable_enc_msg = value;
1509         return count;
1510 }
1511 static DEVICE_ATTR_RW(disable_enclosure_messages);
1512
1513 static struct device_attribute *myrs_shost_attrs[] = {
1514         &dev_attr_serial,
1515         &dev_attr_ctlr_num,
1516         &dev_attr_processor,
1517         &dev_attr_model,
1518         &dev_attr_ctlr_type,
1519         &dev_attr_cache_size,
1520         &dev_attr_firmware,
1521         &dev_attr_discovery,
1522         &dev_attr_flush_cache,
1523         &dev_attr_disable_enclosure_messages,
1524         NULL,
1525 };
1526
1527 /*
1528  * SCSI midlayer interface
1529  */
1530 static int myrs_host_reset(struct scsi_cmnd *scmd)
1531 {
1532         struct Scsi_Host *shost = scmd->device->host;
1533         struct myrs_hba *cs = shost_priv(shost);
1534
1535         cs->reset(cs->io_base);
1536         return SUCCESS;
1537 }
1538
1539 static void myrs_mode_sense(struct myrs_hba *cs, struct scsi_cmnd *scmd,
1540                 struct myrs_ldev_info *ldev_info)
1541 {
1542         unsigned char modes[32], *mode_pg;
1543         bool dbd;
1544         size_t mode_len;
1545
1546         dbd = (scmd->cmnd[1] & 0x08) == 0x08;
1547         if (dbd) {
1548                 mode_len = 24;
1549                 mode_pg = &modes[4];
1550         } else {
1551                 mode_len = 32;
1552                 mode_pg = &modes[12];
1553         }
1554         memset(modes, 0, sizeof(modes));
1555         modes[0] = mode_len - 1;
1556         modes[2] = 0x10; /* Enable FUA */
1557         if (ldev_info->ldev_control.wce == MYRS_LOGICALDEVICE_RO)
1558                 modes[2] |= 0x80;
1559         if (!dbd) {
1560                 unsigned char *block_desc = &modes[4];
1561
1562                 modes[3] = 8;
1563                 put_unaligned_be32(ldev_info->cfg_devsize, &block_desc[0]);
1564                 put_unaligned_be32(ldev_info->devsize_bytes, &block_desc[5]);
1565         }
1566         mode_pg[0] = 0x08;
1567         mode_pg[1] = 0x12;
1568         if (ldev_info->ldev_control.rce == MYRS_READCACHE_DISABLED)
1569                 mode_pg[2] |= 0x01;
1570         if (ldev_info->ldev_control.wce == MYRS_WRITECACHE_ENABLED ||
1571             ldev_info->ldev_control.wce == MYRS_INTELLIGENT_WRITECACHE_ENABLED)
1572                 mode_pg[2] |= 0x04;
1573         if (ldev_info->cacheline_size) {
1574                 mode_pg[2] |= 0x08;
1575                 put_unaligned_be16(1 << ldev_info->cacheline_size,
1576                                    &mode_pg[14]);
1577         }
1578
1579         scsi_sg_copy_from_buffer(scmd, modes, mode_len);
1580 }
1581
1582 static int myrs_queuecommand(struct Scsi_Host *shost,
1583                 struct scsi_cmnd *scmd)
1584 {
1585         struct myrs_hba *cs = shost_priv(shost);
1586         struct myrs_cmdblk *cmd_blk = scsi_cmd_priv(scmd);
1587         union myrs_cmd_mbox *mbox = &cmd_blk->mbox;
1588         struct scsi_device *sdev = scmd->device;
1589         union myrs_sgl *hw_sge;
1590         dma_addr_t sense_addr;
1591         struct scatterlist *sgl;
1592         unsigned long flags, timeout;
1593         int nsge;
1594
1595         if (!scmd->device->hostdata) {
1596                 scmd->result = (DID_NO_CONNECT << 16);
1597                 scmd->scsi_done(scmd);
1598                 return 0;
1599         }
1600
1601         switch (scmd->cmnd[0]) {
1602         case REPORT_LUNS:
1603                 scsi_build_sense_buffer(0, scmd->sense_buffer, ILLEGAL_REQUEST,
1604                                         0x20, 0x0);
1605                 scmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1606                 scmd->scsi_done(scmd);
1607                 return 0;
1608         case MODE_SENSE:
1609                 if (scmd->device->channel >= cs->ctlr_info->physchan_present) {
1610                         struct myrs_ldev_info *ldev_info = sdev->hostdata;
1611
1612                         if ((scmd->cmnd[2] & 0x3F) != 0x3F &&
1613                             (scmd->cmnd[2] & 0x3F) != 0x08) {
1614                                 /* Illegal request, invalid field in CDB */
1615                                 scsi_build_sense_buffer(0, scmd->sense_buffer,
1616                                         ILLEGAL_REQUEST, 0x24, 0);
1617                                 scmd->result = (DRIVER_SENSE << 24) |
1618                                         SAM_STAT_CHECK_CONDITION;
1619                         } else {
1620                                 myrs_mode_sense(cs, scmd, ldev_info);
1621                                 scmd->result = (DID_OK << 16);
1622                         }
1623                         scmd->scsi_done(scmd);
1624                         return 0;
1625                 }
1626                 break;
1627         }
1628
1629         myrs_reset_cmd(cmd_blk);
1630         cmd_blk->sense = dma_pool_alloc(cs->sense_pool, GFP_ATOMIC,
1631                                         &sense_addr);
1632         if (!cmd_blk->sense)
1633                 return SCSI_MLQUEUE_HOST_BUSY;
1634         cmd_blk->sense_addr = sense_addr;
1635
1636         timeout = scmd->request->timeout;
1637         if (scmd->cmd_len <= 10) {
1638                 if (scmd->device->channel >= cs->ctlr_info->physchan_present) {
1639                         struct myrs_ldev_info *ldev_info = sdev->hostdata;
1640
1641                         mbox->SCSI_10.opcode = MYRS_CMD_OP_SCSI_10;
1642                         mbox->SCSI_10.pdev.lun = ldev_info->lun;
1643                         mbox->SCSI_10.pdev.target = ldev_info->target;
1644                         mbox->SCSI_10.pdev.channel = ldev_info->channel;
1645                         mbox->SCSI_10.pdev.ctlr = 0;
1646                 } else {
1647                         mbox->SCSI_10.opcode = MYRS_CMD_OP_SCSI_10_PASSTHRU;
1648                         mbox->SCSI_10.pdev.lun = sdev->lun;
1649                         mbox->SCSI_10.pdev.target = sdev->id;
1650                         mbox->SCSI_10.pdev.channel = sdev->channel;
1651                 }
1652                 mbox->SCSI_10.id = scmd->request->tag + 3;
1653                 mbox->SCSI_10.control.dma_ctrl_to_host =
1654                         (scmd->sc_data_direction == DMA_FROM_DEVICE);
1655                 if (scmd->request->cmd_flags & REQ_FUA)
1656                         mbox->SCSI_10.control.fua = true;
1657                 mbox->SCSI_10.dma_size = scsi_bufflen(scmd);
1658                 mbox->SCSI_10.sense_addr = cmd_blk->sense_addr;
1659                 mbox->SCSI_10.sense_len = MYRS_SENSE_SIZE;
1660                 mbox->SCSI_10.cdb_len = scmd->cmd_len;
1661                 if (timeout > 60) {
1662                         mbox->SCSI_10.tmo.tmo_scale = MYRS_TMO_SCALE_MINUTES;
1663                         mbox->SCSI_10.tmo.tmo_val = timeout / 60;
1664                 } else {
1665                         mbox->SCSI_10.tmo.tmo_scale = MYRS_TMO_SCALE_SECONDS;
1666                         mbox->SCSI_10.tmo.tmo_val = timeout;
1667                 }
1668                 memcpy(&mbox->SCSI_10.cdb, scmd->cmnd, scmd->cmd_len);
1669                 hw_sge = &mbox->SCSI_10.dma_addr;
1670                 cmd_blk->dcdb = NULL;
1671         } else {
1672                 dma_addr_t dcdb_dma;
1673
1674                 cmd_blk->dcdb = dma_pool_alloc(cs->dcdb_pool, GFP_ATOMIC,
1675                                                &dcdb_dma);
1676                 if (!cmd_blk->dcdb) {
1677                         dma_pool_free(cs->sense_pool, cmd_blk->sense,
1678                                       cmd_blk->sense_addr);
1679                         cmd_blk->sense = NULL;
1680                         cmd_blk->sense_addr = 0;
1681                         return SCSI_MLQUEUE_HOST_BUSY;
1682                 }
1683                 cmd_blk->dcdb_dma = dcdb_dma;
1684                 if (scmd->device->channel >= cs->ctlr_info->physchan_present) {
1685                         struct myrs_ldev_info *ldev_info = sdev->hostdata;
1686
1687                         mbox->SCSI_255.opcode = MYRS_CMD_OP_SCSI_256;
1688                         mbox->SCSI_255.pdev.lun = ldev_info->lun;
1689                         mbox->SCSI_255.pdev.target = ldev_info->target;
1690                         mbox->SCSI_255.pdev.channel = ldev_info->channel;
1691                         mbox->SCSI_255.pdev.ctlr = 0;
1692                 } else {
1693                         mbox->SCSI_255.opcode = MYRS_CMD_OP_SCSI_255_PASSTHRU;
1694                         mbox->SCSI_255.pdev.lun = sdev->lun;
1695                         mbox->SCSI_255.pdev.target = sdev->id;
1696                         mbox->SCSI_255.pdev.channel = sdev->channel;
1697                 }
1698                 mbox->SCSI_255.id = scmd->request->tag + 3;
1699                 mbox->SCSI_255.control.dma_ctrl_to_host =
1700                         (scmd->sc_data_direction == DMA_FROM_DEVICE);
1701                 if (scmd->request->cmd_flags & REQ_FUA)
1702                         mbox->SCSI_255.control.fua = true;
1703                 mbox->SCSI_255.dma_size = scsi_bufflen(scmd);
1704                 mbox->SCSI_255.sense_addr = cmd_blk->sense_addr;
1705                 mbox->SCSI_255.sense_len = MYRS_SENSE_SIZE;
1706                 mbox->SCSI_255.cdb_len = scmd->cmd_len;
1707                 mbox->SCSI_255.cdb_addr = cmd_blk->dcdb_dma;
1708                 if (timeout > 60) {
1709                         mbox->SCSI_255.tmo.tmo_scale = MYRS_TMO_SCALE_MINUTES;
1710                         mbox->SCSI_255.tmo.tmo_val = timeout / 60;
1711                 } else {
1712                         mbox->SCSI_255.tmo.tmo_scale = MYRS_TMO_SCALE_SECONDS;
1713                         mbox->SCSI_255.tmo.tmo_val = timeout;
1714                 }
1715                 memcpy(cmd_blk->dcdb, scmd->cmnd, scmd->cmd_len);
1716                 hw_sge = &mbox->SCSI_255.dma_addr;
1717         }
1718         if (scmd->sc_data_direction == DMA_NONE)
1719                 goto submit;
1720         nsge = scsi_dma_map(scmd);
1721         if (nsge == 1) {
1722                 sgl = scsi_sglist(scmd);
1723                 hw_sge->sge[0].sge_addr = (u64)sg_dma_address(sgl);
1724                 hw_sge->sge[0].sge_count = (u64)sg_dma_len(sgl);
1725         } else {
1726                 struct myrs_sge *hw_sgl;
1727                 dma_addr_t hw_sgl_addr;
1728                 int i;
1729
1730                 if (nsge > 2) {
1731                         hw_sgl = dma_pool_alloc(cs->sg_pool, GFP_ATOMIC,
1732                                                 &hw_sgl_addr);
1733                         if (WARN_ON(!hw_sgl)) {
1734                                 if (cmd_blk->dcdb) {
1735                                         dma_pool_free(cs->dcdb_pool,
1736                                                       cmd_blk->dcdb,
1737                                                       cmd_blk->dcdb_dma);
1738                                         cmd_blk->dcdb = NULL;
1739                                         cmd_blk->dcdb_dma = 0;
1740                                 }
1741                                 dma_pool_free(cs->sense_pool,
1742                                               cmd_blk->sense,
1743                                               cmd_blk->sense_addr);
1744                                 cmd_blk->sense = NULL;
1745                                 cmd_blk->sense_addr = 0;
1746                                 return SCSI_MLQUEUE_HOST_BUSY;
1747                         }
1748                         cmd_blk->sgl = hw_sgl;
1749                         cmd_blk->sgl_addr = hw_sgl_addr;
1750                         if (scmd->cmd_len <= 10)
1751                                 mbox->SCSI_10.control.add_sge_mem = true;
1752                         else
1753                                 mbox->SCSI_255.control.add_sge_mem = true;
1754                         hw_sge->ext.sge0_len = nsge;
1755                         hw_sge->ext.sge0_addr = cmd_blk->sgl_addr;
1756                 } else
1757                         hw_sgl = hw_sge->sge;
1758
1759                 scsi_for_each_sg(scmd, sgl, nsge, i) {
1760                         if (WARN_ON(!hw_sgl)) {
1761                                 scsi_dma_unmap(scmd);
1762                                 scmd->result = (DID_ERROR << 16);
1763                                 scmd->scsi_done(scmd);
1764                                 return 0;
1765                         }
1766                         hw_sgl->sge_addr = (u64)sg_dma_address(sgl);
1767                         hw_sgl->sge_count = (u64)sg_dma_len(sgl);
1768                         hw_sgl++;
1769                 }
1770         }
1771 submit:
1772         spin_lock_irqsave(&cs->queue_lock, flags);
1773         myrs_qcmd(cs, cmd_blk);
1774         spin_unlock_irqrestore(&cs->queue_lock, flags);
1775
1776         return 0;
1777 }
1778
1779 static unsigned short myrs_translate_ldev(struct myrs_hba *cs,
1780                 struct scsi_device *sdev)
1781 {
1782         unsigned short ldev_num;
1783         unsigned int chan_offset =
1784                 sdev->channel - cs->ctlr_info->physchan_present;
1785
1786         ldev_num = sdev->id + chan_offset * sdev->host->max_id;
1787
1788         return ldev_num;
1789 }
1790
1791 static int myrs_slave_alloc(struct scsi_device *sdev)
1792 {
1793         struct myrs_hba *cs = shost_priv(sdev->host);
1794         unsigned char status;
1795
1796         if (sdev->channel > sdev->host->max_channel)
1797                 return 0;
1798
1799         if (sdev->channel >= cs->ctlr_info->physchan_present) {
1800                 struct myrs_ldev_info *ldev_info;
1801                 unsigned short ldev_num;
1802
1803                 if (sdev->lun > 0)
1804                         return -ENXIO;
1805
1806                 ldev_num = myrs_translate_ldev(cs, sdev);
1807
1808                 ldev_info = kzalloc(sizeof(*ldev_info), GFP_KERNEL|GFP_DMA);
1809                 if (!ldev_info)
1810                         return -ENOMEM;
1811
1812                 status = myrs_get_ldev_info(cs, ldev_num, ldev_info);
1813                 if (status != MYRS_STATUS_SUCCESS) {
1814                         sdev->hostdata = NULL;
1815                         kfree(ldev_info);
1816                 } else {
1817                         enum raid_level level;
1818
1819                         dev_dbg(&sdev->sdev_gendev,
1820                                 "Logical device mapping %d:%d:%d -> %d\n",
1821                                 ldev_info->channel, ldev_info->target,
1822                                 ldev_info->lun, ldev_info->ldev_num);
1823
1824                         sdev->hostdata = ldev_info;
1825                         switch (ldev_info->raid_level) {
1826                         case MYRS_RAID_LEVEL0:
1827                                 level = RAID_LEVEL_LINEAR;
1828                                 break;
1829                         case MYRS_RAID_LEVEL1:
1830                                 level = RAID_LEVEL_1;
1831                                 break;
1832                         case MYRS_RAID_LEVEL3:
1833                         case MYRS_RAID_LEVEL3F:
1834                         case MYRS_RAID_LEVEL3L:
1835                                 level = RAID_LEVEL_3;
1836                                 break;
1837                         case MYRS_RAID_LEVEL5:
1838                         case MYRS_RAID_LEVEL5L:
1839                                 level = RAID_LEVEL_5;
1840                                 break;
1841                         case MYRS_RAID_LEVEL6:
1842                                 level = RAID_LEVEL_6;
1843                                 break;
1844                         case MYRS_RAID_LEVELE:
1845                         case MYRS_RAID_NEWSPAN:
1846                         case MYRS_RAID_SPAN:
1847                                 level = RAID_LEVEL_LINEAR;
1848                                 break;
1849                         case MYRS_RAID_JBOD:
1850                                 level = RAID_LEVEL_JBOD;
1851                                 break;
1852                         default:
1853                                 level = RAID_LEVEL_UNKNOWN;
1854                                 break;
1855                         }
1856                         raid_set_level(myrs_raid_template,
1857                                        &sdev->sdev_gendev, level);
1858                         if (ldev_info->dev_state != MYRS_DEVICE_ONLINE) {
1859                                 const char *name;
1860
1861                                 name = myrs_devstate_name(ldev_info->dev_state);
1862                                 sdev_printk(KERN_DEBUG, sdev,
1863                                             "logical device in state %s\n",
1864                                             name ? name : "Invalid");
1865                         }
1866                 }
1867         } else {
1868                 struct myrs_pdev_info *pdev_info;
1869
1870                 pdev_info = kzalloc(sizeof(*pdev_info), GFP_KERNEL|GFP_DMA);
1871                 if (!pdev_info)
1872                         return -ENOMEM;
1873
1874                 status = myrs_get_pdev_info(cs, sdev->channel,
1875                                             sdev->id, sdev->lun,
1876                                             pdev_info);
1877                 if (status != MYRS_STATUS_SUCCESS) {
1878                         sdev->hostdata = NULL;
1879                         kfree(pdev_info);
1880                         return -ENXIO;
1881                 }
1882                 sdev->hostdata = pdev_info;
1883         }
1884         return 0;
1885 }
1886
1887 static int myrs_slave_configure(struct scsi_device *sdev)
1888 {
1889         struct myrs_hba *cs = shost_priv(sdev->host);
1890         struct myrs_ldev_info *ldev_info;
1891
1892         if (sdev->channel > sdev->host->max_channel)
1893                 return -ENXIO;
1894
1895         if (sdev->channel < cs->ctlr_info->physchan_present) {
1896                 /* Skip HBA device */
1897                 if (sdev->type == TYPE_RAID)
1898                         return -ENXIO;
1899                 sdev->no_uld_attach = 1;
1900                 return 0;
1901         }
1902         if (sdev->lun != 0)
1903                 return -ENXIO;
1904
1905         ldev_info = sdev->hostdata;
1906         if (!ldev_info)
1907                 return -ENXIO;
1908         if (ldev_info->ldev_control.wce == MYRS_WRITECACHE_ENABLED ||
1909             ldev_info->ldev_control.wce == MYRS_INTELLIGENT_WRITECACHE_ENABLED)
1910                 sdev->wce_default_on = 1;
1911         sdev->tagged_supported = 1;
1912         return 0;
1913 }
1914
1915 static void myrs_slave_destroy(struct scsi_device *sdev)
1916 {
1917         kfree(sdev->hostdata);
1918 }
1919
1920 static struct scsi_host_template myrs_template = {
1921         .module                 = THIS_MODULE,
1922         .name                   = "DAC960",
1923         .proc_name              = "myrs",
1924         .queuecommand           = myrs_queuecommand,
1925         .eh_host_reset_handler  = myrs_host_reset,
1926         .slave_alloc            = myrs_slave_alloc,
1927         .slave_configure        = myrs_slave_configure,
1928         .slave_destroy          = myrs_slave_destroy,
1929         .cmd_size               = sizeof(struct myrs_cmdblk),
1930         .shost_attrs            = myrs_shost_attrs,
1931         .sdev_attrs             = myrs_sdev_attrs,
1932         .this_id                = -1,
1933 };
1934
1935 static struct myrs_hba *myrs_alloc_host(struct pci_dev *pdev,
1936                 const struct pci_device_id *entry)
1937 {
1938         struct Scsi_Host *shost;
1939         struct myrs_hba *cs;
1940
1941         shost = scsi_host_alloc(&myrs_template, sizeof(struct myrs_hba));
1942         if (!shost)
1943                 return NULL;
1944
1945         shost->max_cmd_len = 16;
1946         shost->max_lun = 256;
1947         cs = shost_priv(shost);
1948         mutex_init(&cs->dcmd_mutex);
1949         mutex_init(&cs->cinfo_mutex);
1950         cs->host = shost;
1951
1952         return cs;
1953 }
1954
1955 /*
1956  * RAID template functions
1957  */
1958
1959 /**
1960  * myrs_is_raid - return boolean indicating device is raid volume
1961  * @dev: the device struct object
1962  */
1963 static int
1964 myrs_is_raid(struct device *dev)
1965 {
1966         struct scsi_device *sdev = to_scsi_device(dev);
1967         struct myrs_hba *cs = shost_priv(sdev->host);
1968
1969         return (sdev->channel >= cs->ctlr_info->physchan_present) ? 1 : 0;
1970 }
1971
1972 /**
1973  * myrs_get_resync - get raid volume resync percent complete
1974  * @dev: the device struct object
1975  */
1976 static void
1977 myrs_get_resync(struct device *dev)
1978 {
1979         struct scsi_device *sdev = to_scsi_device(dev);
1980         struct myrs_hba *cs = shost_priv(sdev->host);
1981         struct myrs_ldev_info *ldev_info = sdev->hostdata;
1982         u64 percent_complete = 0;
1983
1984         if (sdev->channel < cs->ctlr_info->physchan_present || !ldev_info)
1985                 return;
1986         if (ldev_info->rbld_active) {
1987                 unsigned short ldev_num = ldev_info->ldev_num;
1988
1989                 myrs_get_ldev_info(cs, ldev_num, ldev_info);
1990                 percent_complete = ldev_info->rbld_lba * 100;
1991                 do_div(percent_complete, ldev_info->cfg_devsize);
1992         }
1993         raid_set_resync(myrs_raid_template, dev, percent_complete);
1994 }
1995
1996 /**
1997  * myrs_get_state - get raid volume status
1998  * @dev: the device struct object
1999  */
2000 static void
2001 myrs_get_state(struct device *dev)
2002 {
2003         struct scsi_device *sdev = to_scsi_device(dev);
2004         struct myrs_hba *cs = shost_priv(sdev->host);
2005         struct myrs_ldev_info *ldev_info = sdev->hostdata;
2006         enum raid_state state = RAID_STATE_UNKNOWN;
2007
2008         if (sdev->channel < cs->ctlr_info->physchan_present || !ldev_info)
2009                 state = RAID_STATE_UNKNOWN;
2010         else {
2011                 switch (ldev_info->dev_state) {
2012                 case MYRS_DEVICE_ONLINE:
2013                         state = RAID_STATE_ACTIVE;
2014                         break;
2015                 case MYRS_DEVICE_SUSPECTED_CRITICAL:
2016                 case MYRS_DEVICE_CRITICAL:
2017                         state = RAID_STATE_DEGRADED;
2018                         break;
2019                 case MYRS_DEVICE_REBUILD:
2020                         state = RAID_STATE_RESYNCING;
2021                         break;
2022                 case MYRS_DEVICE_UNCONFIGURED:
2023                 case MYRS_DEVICE_INVALID_STATE:
2024                         state = RAID_STATE_UNKNOWN;
2025                         break;
2026                 default:
2027                         state = RAID_STATE_OFFLINE;
2028                 }
2029         }
2030         raid_set_state(myrs_raid_template, dev, state);
2031 }
2032
2033 static struct raid_function_template myrs_raid_functions = {
2034         .cookie         = &myrs_template,
2035         .is_raid        = myrs_is_raid,
2036         .get_resync     = myrs_get_resync,
2037         .get_state      = myrs_get_state,
2038 };
2039
2040 /*
2041  * PCI interface functions
2042  */
2043 static void myrs_flush_cache(struct myrs_hba *cs)
2044 {
2045         myrs_dev_op(cs, MYRS_IOCTL_FLUSH_DEVICE_DATA, MYRS_RAID_CONTROLLER);
2046 }
2047
2048 static void myrs_handle_scsi(struct myrs_hba *cs, struct myrs_cmdblk *cmd_blk,
2049                 struct scsi_cmnd *scmd)
2050 {
2051         unsigned char status;
2052
2053         if (!cmd_blk)
2054                 return;
2055
2056         scsi_dma_unmap(scmd);
2057         status = cmd_blk->status;
2058         if (cmd_blk->sense) {
2059                 if (status == MYRS_STATUS_FAILED && cmd_blk->sense_len) {
2060                         unsigned int sense_len = SCSI_SENSE_BUFFERSIZE;
2061
2062                         if (sense_len > cmd_blk->sense_len)
2063                                 sense_len = cmd_blk->sense_len;
2064                         memcpy(scmd->sense_buffer, cmd_blk->sense, sense_len);
2065                 }
2066                 dma_pool_free(cs->sense_pool, cmd_blk->sense,
2067                               cmd_blk->sense_addr);
2068                 cmd_blk->sense = NULL;
2069                 cmd_blk->sense_addr = 0;
2070         }
2071         if (cmd_blk->dcdb) {
2072                 dma_pool_free(cs->dcdb_pool, cmd_blk->dcdb,
2073                               cmd_blk->dcdb_dma);
2074                 cmd_blk->dcdb = NULL;
2075                 cmd_blk->dcdb_dma = 0;
2076         }
2077         if (cmd_blk->sgl) {
2078                 dma_pool_free(cs->sg_pool, cmd_blk->sgl,
2079                               cmd_blk->sgl_addr);
2080                 cmd_blk->sgl = NULL;
2081                 cmd_blk->sgl_addr = 0;
2082         }
2083         if (cmd_blk->residual)
2084                 scsi_set_resid(scmd, cmd_blk->residual);
2085         if (status == MYRS_STATUS_DEVICE_NON_RESPONSIVE ||
2086             status == MYRS_STATUS_DEVICE_NON_RESPONSIVE2)
2087                 scmd->result = (DID_BAD_TARGET << 16);
2088         else
2089                 scmd->result = (DID_OK << 16) | status;
2090         scmd->scsi_done(scmd);
2091 }
2092
2093 static void myrs_handle_cmdblk(struct myrs_hba *cs, struct myrs_cmdblk *cmd_blk)
2094 {
2095         if (!cmd_blk)
2096                 return;
2097
2098         if (cmd_blk->complete) {
2099                 complete(cmd_blk->complete);
2100                 cmd_blk->complete = NULL;
2101         }
2102 }
2103
2104 static void myrs_monitor(struct work_struct *work)
2105 {
2106         struct myrs_hba *cs = container_of(work, struct myrs_hba,
2107                                            monitor_work.work);
2108         struct Scsi_Host *shost = cs->host;
2109         struct myrs_ctlr_info *info = cs->ctlr_info;
2110         unsigned int epoch = cs->fwstat_buf->epoch;
2111         unsigned long interval = MYRS_PRIMARY_MONITOR_INTERVAL;
2112         unsigned char status;
2113
2114         dev_dbg(&shost->shost_gendev, "monitor tick\n");
2115
2116         status = myrs_get_fwstatus(cs);
2117
2118         if (cs->needs_update) {
2119                 cs->needs_update = false;
2120                 mutex_lock(&cs->cinfo_mutex);
2121                 status = myrs_get_ctlr_info(cs);
2122                 mutex_unlock(&cs->cinfo_mutex);
2123         }
2124         if (cs->fwstat_buf->next_evseq - cs->next_evseq > 0) {
2125                 status = myrs_get_event(cs, cs->next_evseq,
2126                                         cs->event_buf);
2127                 if (status == MYRS_STATUS_SUCCESS) {
2128                         myrs_log_event(cs, cs->event_buf);
2129                         cs->next_evseq++;
2130                         interval = 1;
2131                 }
2132         }
2133
2134         if (time_after(jiffies, cs->secondary_monitor_time
2135                        + MYRS_SECONDARY_MONITOR_INTERVAL))
2136                 cs->secondary_monitor_time = jiffies;
2137
2138         if (info->bg_init_active +
2139             info->ldev_init_active +
2140             info->pdev_init_active +
2141             info->cc_active +
2142             info->rbld_active +
2143             info->exp_active != 0) {
2144                 struct scsi_device *sdev;
2145
2146                 shost_for_each_device(sdev, shost) {
2147                         struct myrs_ldev_info *ldev_info;
2148                         int ldev_num;
2149
2150                         if (sdev->channel < info->physchan_present)
2151                                 continue;
2152                         ldev_info = sdev->hostdata;
2153                         if (!ldev_info)
2154                                 continue;
2155                         ldev_num = ldev_info->ldev_num;
2156                         myrs_get_ldev_info(cs, ldev_num, ldev_info);
2157                 }
2158                 cs->needs_update = true;
2159         }
2160         if (epoch == cs->epoch &&
2161             cs->fwstat_buf->next_evseq == cs->next_evseq &&
2162             (cs->needs_update == false ||
2163              time_before(jiffies, cs->primary_monitor_time
2164                          + MYRS_PRIMARY_MONITOR_INTERVAL))) {
2165                 interval = MYRS_SECONDARY_MONITOR_INTERVAL;
2166         }
2167
2168         if (interval > 1)
2169                 cs->primary_monitor_time = jiffies;
2170         queue_delayed_work(cs->work_q, &cs->monitor_work, interval);
2171 }
2172
2173 static bool myrs_create_mempools(struct pci_dev *pdev, struct myrs_hba *cs)
2174 {
2175         struct Scsi_Host *shost = cs->host;
2176         size_t elem_size, elem_align;
2177
2178         elem_align = sizeof(struct myrs_sge);
2179         elem_size = shost->sg_tablesize * elem_align;
2180         cs->sg_pool = dma_pool_create("myrs_sg", &pdev->dev,
2181                                       elem_size, elem_align, 0);
2182         if (cs->sg_pool == NULL) {
2183                 shost_printk(KERN_ERR, shost,
2184                              "Failed to allocate SG pool\n");
2185                 return false;
2186         }
2187
2188         cs->sense_pool = dma_pool_create("myrs_sense", &pdev->dev,
2189                                          MYRS_SENSE_SIZE, sizeof(int), 0);
2190         if (cs->sense_pool == NULL) {
2191                 dma_pool_destroy(cs->sg_pool);
2192                 cs->sg_pool = NULL;
2193                 shost_printk(KERN_ERR, shost,
2194                              "Failed to allocate sense data pool\n");
2195                 return false;
2196         }
2197
2198         cs->dcdb_pool = dma_pool_create("myrs_dcdb", &pdev->dev,
2199                                         MYRS_DCDB_SIZE,
2200                                         sizeof(unsigned char), 0);
2201         if (!cs->dcdb_pool) {
2202                 dma_pool_destroy(cs->sg_pool);
2203                 cs->sg_pool = NULL;
2204                 dma_pool_destroy(cs->sense_pool);
2205                 cs->sense_pool = NULL;
2206                 shost_printk(KERN_ERR, shost,
2207                              "Failed to allocate DCDB pool\n");
2208                 return false;
2209         }
2210
2211         snprintf(cs->work_q_name, sizeof(cs->work_q_name),
2212                  "myrs_wq_%d", shost->host_no);
2213         cs->work_q = create_singlethread_workqueue(cs->work_q_name);
2214         if (!cs->work_q) {
2215                 dma_pool_destroy(cs->dcdb_pool);
2216                 cs->dcdb_pool = NULL;
2217                 dma_pool_destroy(cs->sg_pool);
2218                 cs->sg_pool = NULL;
2219                 dma_pool_destroy(cs->sense_pool);
2220                 cs->sense_pool = NULL;
2221                 shost_printk(KERN_ERR, shost,
2222                              "Failed to create workqueue\n");
2223                 return false;
2224         }
2225
2226         /* Initialize the Monitoring Timer. */
2227         INIT_DELAYED_WORK(&cs->monitor_work, myrs_monitor);
2228         queue_delayed_work(cs->work_q, &cs->monitor_work, 1);
2229
2230         return true;
2231 }
2232
2233 static void myrs_destroy_mempools(struct myrs_hba *cs)
2234 {
2235         cancel_delayed_work_sync(&cs->monitor_work);
2236         destroy_workqueue(cs->work_q);
2237
2238         dma_pool_destroy(cs->sg_pool);
2239         dma_pool_destroy(cs->dcdb_pool);
2240         dma_pool_destroy(cs->sense_pool);
2241 }
2242
2243 static void myrs_unmap(struct myrs_hba *cs)
2244 {
2245         kfree(cs->event_buf);
2246         kfree(cs->ctlr_info);
2247         if (cs->fwstat_buf) {
2248                 dma_free_coherent(&cs->pdev->dev, sizeof(struct myrs_fwstat),
2249                                   cs->fwstat_buf, cs->fwstat_addr);
2250                 cs->fwstat_buf = NULL;
2251         }
2252         if (cs->first_stat_mbox) {
2253                 dma_free_coherent(&cs->pdev->dev, cs->stat_mbox_size,
2254                                   cs->first_stat_mbox, cs->stat_mbox_addr);
2255                 cs->first_stat_mbox = NULL;
2256         }
2257         if (cs->first_cmd_mbox) {
2258                 dma_free_coherent(&cs->pdev->dev, cs->cmd_mbox_size,
2259                                   cs->first_cmd_mbox, cs->cmd_mbox_addr);
2260                 cs->first_cmd_mbox = NULL;
2261         }
2262 }
2263
2264 static void myrs_cleanup(struct myrs_hba *cs)
2265 {
2266         struct pci_dev *pdev = cs->pdev;
2267
2268         /* Free the memory mailbox, status, and related structures */
2269         myrs_unmap(cs);
2270
2271         if (cs->mmio_base) {
2272                 cs->disable_intr(cs);
2273                 iounmap(cs->mmio_base);
2274                 cs->mmio_base = NULL;
2275         }
2276         if (cs->irq)
2277                 free_irq(cs->irq, cs);
2278         if (cs->io_addr)
2279                 release_region(cs->io_addr, 0x80);
2280         pci_set_drvdata(pdev, NULL);
2281         pci_disable_device(pdev);
2282         scsi_host_put(cs->host);
2283 }
2284
2285 static struct myrs_hba *myrs_detect(struct pci_dev *pdev,
2286                 const struct pci_device_id *entry)
2287 {
2288         struct myrs_privdata *privdata =
2289                 (struct myrs_privdata *)entry->driver_data;
2290         irq_handler_t irq_handler = privdata->irq_handler;
2291         unsigned int mmio_size = privdata->mmio_size;
2292         struct myrs_hba *cs = NULL;
2293
2294         cs = myrs_alloc_host(pdev, entry);
2295         if (!cs) {
2296                 dev_err(&pdev->dev, "Unable to allocate Controller\n");
2297                 return NULL;
2298         }
2299         cs->pdev = pdev;
2300
2301         if (pci_enable_device(pdev))
2302                 goto Failure;
2303
2304         cs->pci_addr = pci_resource_start(pdev, 0);
2305
2306         pci_set_drvdata(pdev, cs);
2307         spin_lock_init(&cs->queue_lock);
2308         /* Map the Controller Register Window. */
2309         if (mmio_size < PAGE_SIZE)
2310                 mmio_size = PAGE_SIZE;
2311         cs->mmio_base = ioremap(cs->pci_addr & PAGE_MASK, mmio_size);
2312         if (cs->mmio_base == NULL) {
2313                 dev_err(&pdev->dev,
2314                         "Unable to map Controller Register Window\n");
2315                 goto Failure;
2316         }
2317
2318         cs->io_base = cs->mmio_base + (cs->pci_addr & ~PAGE_MASK);
2319         if (privdata->hw_init(pdev, cs, cs->io_base))
2320                 goto Failure;
2321
2322         /* Acquire shared access to the IRQ Channel. */
2323         if (request_irq(pdev->irq, irq_handler, IRQF_SHARED, "myrs", cs) < 0) {
2324                 dev_err(&pdev->dev,
2325                         "Unable to acquire IRQ Channel %d\n", pdev->irq);
2326                 goto Failure;
2327         }
2328         cs->irq = pdev->irq;
2329         return cs;
2330
2331 Failure:
2332         dev_err(&pdev->dev,
2333                 "Failed to initialize Controller\n");
2334         myrs_cleanup(cs);
2335         return NULL;
2336 }
2337
2338 /*
2339  * myrs_err_status reports Controller BIOS Messages passed through
2340  * the Error Status Register when the driver performs the BIOS handshaking.
2341  * It returns true for fatal errors and false otherwise.
2342  */
2343
2344 static bool myrs_err_status(struct myrs_hba *cs, unsigned char status,
2345                 unsigned char parm0, unsigned char parm1)
2346 {
2347         struct pci_dev *pdev = cs->pdev;
2348
2349         switch (status) {
2350         case 0x00:
2351                 dev_info(&pdev->dev,
2352                          "Physical Device %d:%d Not Responding\n",
2353                          parm1, parm0);
2354                 break;
2355         case 0x08:
2356                 dev_notice(&pdev->dev, "Spinning Up Drives\n");
2357                 break;
2358         case 0x30:
2359                 dev_notice(&pdev->dev, "Configuration Checksum Error\n");
2360                 break;
2361         case 0x60:
2362                 dev_notice(&pdev->dev, "Mirror Race Recovery Failed\n");
2363                 break;
2364         case 0x70:
2365                 dev_notice(&pdev->dev, "Mirror Race Recovery In Progress\n");
2366                 break;
2367         case 0x90:
2368                 dev_notice(&pdev->dev, "Physical Device %d:%d COD Mismatch\n",
2369                            parm1, parm0);
2370                 break;
2371         case 0xA0:
2372                 dev_notice(&pdev->dev, "Logical Drive Installation Aborted\n");
2373                 break;
2374         case 0xB0:
2375                 dev_notice(&pdev->dev, "Mirror Race On A Critical Logical Drive\n");
2376                 break;
2377         case 0xD0:
2378                 dev_notice(&pdev->dev, "New Controller Configuration Found\n");
2379                 break;
2380         case 0xF0:
2381                 dev_err(&pdev->dev, "Fatal Memory Parity Error\n");
2382                 return true;
2383         default:
2384                 dev_err(&pdev->dev, "Unknown Initialization Error %02X\n",
2385                         status);
2386                 return true;
2387         }
2388         return false;
2389 }
2390
2391 /*
2392  * Hardware-specific functions
2393  */
2394
2395 /*
2396  * DAC960 GEM Series Controllers.
2397  */
2398
2399 static inline void DAC960_GEM_hw_mbox_new_cmd(void __iomem *base)
2400 {
2401         __le32 val = cpu_to_le32(DAC960_GEM_IDB_HWMBOX_NEW_CMD << 24);
2402
2403         writel(val, base + DAC960_GEM_IDB_READ_OFFSET);
2404 }
2405
2406 static inline void DAC960_GEM_ack_hw_mbox_status(void __iomem *base)
2407 {
2408         __le32 val = cpu_to_le32(DAC960_GEM_IDB_HWMBOX_ACK_STS << 24);
2409
2410         writel(val, base + DAC960_GEM_IDB_CLEAR_OFFSET);
2411 }
2412
2413 static inline void DAC960_GEM_reset_ctrl(void __iomem *base)
2414 {
2415         __le32 val = cpu_to_le32(DAC960_GEM_IDB_CTRL_RESET << 24);
2416
2417         writel(val, base + DAC960_GEM_IDB_READ_OFFSET);
2418 }
2419
2420 static inline void DAC960_GEM_mem_mbox_new_cmd(void __iomem *base)
2421 {
2422         __le32 val = cpu_to_le32(DAC960_GEM_IDB_HWMBOX_NEW_CMD << 24);
2423
2424         writel(val, base + DAC960_GEM_IDB_READ_OFFSET);
2425 }
2426
2427 static inline bool DAC960_GEM_hw_mbox_is_full(void __iomem *base)
2428 {
2429         __le32 val;
2430
2431         val = readl(base + DAC960_GEM_IDB_READ_OFFSET);
2432         return (le32_to_cpu(val) >> 24) & DAC960_GEM_IDB_HWMBOX_FULL;
2433 }
2434
2435 static inline bool DAC960_GEM_init_in_progress(void __iomem *base)
2436 {
2437         __le32 val;
2438
2439         val = readl(base + DAC960_GEM_IDB_READ_OFFSET);
2440         return (le32_to_cpu(val) >> 24) & DAC960_GEM_IDB_INIT_IN_PROGRESS;
2441 }
2442
2443 static inline void DAC960_GEM_ack_hw_mbox_intr(void __iomem *base)
2444 {
2445         __le32 val = cpu_to_le32(DAC960_GEM_ODB_HWMBOX_ACK_IRQ << 24);
2446
2447         writel(val, base + DAC960_GEM_ODB_CLEAR_OFFSET);
2448 }
2449
2450 static inline void DAC960_GEM_ack_intr(void __iomem *base)
2451 {
2452         __le32 val = cpu_to_le32((DAC960_GEM_ODB_HWMBOX_ACK_IRQ |
2453                                   DAC960_GEM_ODB_MMBOX_ACK_IRQ) << 24);
2454
2455         writel(val, base + DAC960_GEM_ODB_CLEAR_OFFSET);
2456 }
2457
2458 static inline bool DAC960_GEM_hw_mbox_status_available(void __iomem *base)
2459 {
2460         __le32 val;
2461
2462         val = readl(base + DAC960_GEM_ODB_READ_OFFSET);
2463         return (le32_to_cpu(val) >> 24) & DAC960_GEM_ODB_HWMBOX_STS_AVAIL;
2464 }
2465
2466 static inline void DAC960_GEM_enable_intr(void __iomem *base)
2467 {
2468         __le32 val = cpu_to_le32((DAC960_GEM_IRQMASK_HWMBOX_IRQ |
2469                                   DAC960_GEM_IRQMASK_MMBOX_IRQ) << 24);
2470         writel(val, base + DAC960_GEM_IRQMASK_CLEAR_OFFSET);
2471 }
2472
2473 static inline void DAC960_GEM_disable_intr(void __iomem *base)
2474 {
2475         __le32 val = 0;
2476
2477         writel(val, base + DAC960_GEM_IRQMASK_READ_OFFSET);
2478 }
2479
2480 static inline void DAC960_GEM_write_cmd_mbox(union myrs_cmd_mbox *mem_mbox,
2481                 union myrs_cmd_mbox *mbox)
2482 {
2483         memcpy(&mem_mbox->words[1], &mbox->words[1],
2484                sizeof(union myrs_cmd_mbox) - sizeof(unsigned int));
2485         /* Barrier to avoid reordering */
2486         wmb();
2487         mem_mbox->words[0] = mbox->words[0];
2488         /* Barrier to force PCI access */
2489         mb();
2490 }
2491
2492 static inline void DAC960_GEM_write_hw_mbox(void __iomem *base,
2493                 dma_addr_t cmd_mbox_addr)
2494 {
2495         dma_addr_writeql(cmd_mbox_addr, base + DAC960_GEM_CMDMBX_OFFSET);
2496 }
2497
2498 static inline unsigned char DAC960_GEM_read_cmd_status(void __iomem *base)
2499 {
2500         return readw(base + DAC960_GEM_CMDSTS_OFFSET + 2);
2501 }
2502
2503 static inline bool
2504 DAC960_GEM_read_error_status(void __iomem *base, unsigned char *error,
2505                 unsigned char *param0, unsigned char *param1)
2506 {
2507         __le32 val;
2508
2509         val = readl(base + DAC960_GEM_ERRSTS_READ_OFFSET);
2510         if (!((le32_to_cpu(val) >> 24) & DAC960_GEM_ERRSTS_PENDING))
2511                 return false;
2512         *error = val & ~(DAC960_GEM_ERRSTS_PENDING << 24);
2513         *param0 = readb(base + DAC960_GEM_CMDMBX_OFFSET + 0);
2514         *param1 = readb(base + DAC960_GEM_CMDMBX_OFFSET + 1);
2515         writel(0x03000000, base + DAC960_GEM_ERRSTS_CLEAR_OFFSET);
2516         return true;
2517 }
2518
2519 static inline unsigned char
2520 DAC960_GEM_mbox_init(void __iomem *base, dma_addr_t mbox_addr)
2521 {
2522         unsigned char status;
2523
2524         while (DAC960_GEM_hw_mbox_is_full(base))
2525                 udelay(1);
2526         DAC960_GEM_write_hw_mbox(base, mbox_addr);
2527         DAC960_GEM_hw_mbox_new_cmd(base);
2528         while (!DAC960_GEM_hw_mbox_status_available(base))
2529                 udelay(1);
2530         status = DAC960_GEM_read_cmd_status(base);
2531         DAC960_GEM_ack_hw_mbox_intr(base);
2532         DAC960_GEM_ack_hw_mbox_status(base);
2533
2534         return status;
2535 }
2536
2537 static int DAC960_GEM_hw_init(struct pci_dev *pdev,
2538                 struct myrs_hba *cs, void __iomem *base)
2539 {
2540         int timeout = 0;
2541         unsigned char status, parm0, parm1;
2542
2543         DAC960_GEM_disable_intr(base);
2544         DAC960_GEM_ack_hw_mbox_status(base);
2545         udelay(1000);
2546         while (DAC960_GEM_init_in_progress(base) &&
2547                timeout < MYRS_MAILBOX_TIMEOUT) {
2548                 if (DAC960_GEM_read_error_status(base, &status,
2549                                                  &parm0, &parm1) &&
2550                     myrs_err_status(cs, status, parm0, parm1))
2551                         return -EIO;
2552                 udelay(10);
2553                 timeout++;
2554         }
2555         if (timeout == MYRS_MAILBOX_TIMEOUT) {
2556                 dev_err(&pdev->dev,
2557                         "Timeout waiting for Controller Initialisation\n");
2558                 return -ETIMEDOUT;
2559         }
2560         if (!myrs_enable_mmio_mbox(cs, DAC960_GEM_mbox_init)) {
2561                 dev_err(&pdev->dev,
2562                         "Unable to Enable Memory Mailbox Interface\n");
2563                 DAC960_GEM_reset_ctrl(base);
2564                 return -EAGAIN;
2565         }
2566         DAC960_GEM_enable_intr(base);
2567         cs->write_cmd_mbox = DAC960_GEM_write_cmd_mbox;
2568         cs->get_cmd_mbox = DAC960_GEM_mem_mbox_new_cmd;
2569         cs->disable_intr = DAC960_GEM_disable_intr;
2570         cs->reset = DAC960_GEM_reset_ctrl;
2571         return 0;
2572 }
2573
2574 static irqreturn_t DAC960_GEM_intr_handler(int irq, void *arg)
2575 {
2576         struct myrs_hba *cs = arg;
2577         void __iomem *base = cs->io_base;
2578         struct myrs_stat_mbox *next_stat_mbox;
2579         unsigned long flags;
2580
2581         spin_lock_irqsave(&cs->queue_lock, flags);
2582         DAC960_GEM_ack_intr(base);
2583         next_stat_mbox = cs->next_stat_mbox;
2584         while (next_stat_mbox->id > 0) {
2585                 unsigned short id = next_stat_mbox->id;
2586                 struct scsi_cmnd *scmd = NULL;
2587                 struct myrs_cmdblk *cmd_blk = NULL;
2588
2589                 if (id == MYRS_DCMD_TAG)
2590                         cmd_blk = &cs->dcmd_blk;
2591                 else if (id == MYRS_MCMD_TAG)
2592                         cmd_blk = &cs->mcmd_blk;
2593                 else {
2594                         scmd = scsi_host_find_tag(cs->host, id - 3);
2595                         if (scmd)
2596                                 cmd_blk = scsi_cmd_priv(scmd);
2597                 }
2598                 if (cmd_blk) {
2599                         cmd_blk->status = next_stat_mbox->status;
2600                         cmd_blk->sense_len = next_stat_mbox->sense_len;
2601                         cmd_blk->residual = next_stat_mbox->residual;
2602                 } else
2603                         dev_err(&cs->pdev->dev,
2604                                 "Unhandled command completion %d\n", id);
2605
2606                 memset(next_stat_mbox, 0, sizeof(struct myrs_stat_mbox));
2607                 if (++next_stat_mbox > cs->last_stat_mbox)
2608                         next_stat_mbox = cs->first_stat_mbox;
2609
2610                 if (cmd_blk) {
2611                         if (id < 3)
2612                                 myrs_handle_cmdblk(cs, cmd_blk);
2613                         else
2614                                 myrs_handle_scsi(cs, cmd_blk, scmd);
2615                 }
2616         }
2617         cs->next_stat_mbox = next_stat_mbox;
2618         spin_unlock_irqrestore(&cs->queue_lock, flags);
2619         return IRQ_HANDLED;
2620 }
2621
2622 static struct myrs_privdata DAC960_GEM_privdata = {
2623         .hw_init =              DAC960_GEM_hw_init,
2624         .irq_handler =          DAC960_GEM_intr_handler,
2625         .mmio_size =            DAC960_GEM_mmio_size,
2626 };
2627
2628 /*
2629  * DAC960 BA Series Controllers.
2630  */
2631
2632 static inline void DAC960_BA_hw_mbox_new_cmd(void __iomem *base)
2633 {
2634         writeb(DAC960_BA_IDB_HWMBOX_NEW_CMD, base + DAC960_BA_IDB_OFFSET);
2635 }
2636
2637 static inline void DAC960_BA_ack_hw_mbox_status(void __iomem *base)
2638 {
2639         writeb(DAC960_BA_IDB_HWMBOX_ACK_STS, base + DAC960_BA_IDB_OFFSET);
2640 }
2641
2642 static inline void DAC960_BA_reset_ctrl(void __iomem *base)
2643 {
2644         writeb(DAC960_BA_IDB_CTRL_RESET, base + DAC960_BA_IDB_OFFSET);
2645 }
2646
2647 static inline void DAC960_BA_mem_mbox_new_cmd(void __iomem *base)
2648 {
2649         writeb(DAC960_BA_IDB_MMBOX_NEW_CMD, base + DAC960_BA_IDB_OFFSET);
2650 }
2651
2652 static inline bool DAC960_BA_hw_mbox_is_full(void __iomem *base)
2653 {
2654         u8 val;
2655
2656         val = readb(base + DAC960_BA_IDB_OFFSET);
2657         return !(val & DAC960_BA_IDB_HWMBOX_EMPTY);
2658 }
2659
2660 static inline bool DAC960_BA_init_in_progress(void __iomem *base)
2661 {
2662         u8 val;
2663
2664         val = readb(base + DAC960_BA_IDB_OFFSET);
2665         return !(val & DAC960_BA_IDB_INIT_DONE);
2666 }
2667
2668 static inline void DAC960_BA_ack_hw_mbox_intr(void __iomem *base)
2669 {
2670         writeb(DAC960_BA_ODB_HWMBOX_ACK_IRQ, base + DAC960_BA_ODB_OFFSET);
2671 }
2672
2673 static inline void DAC960_BA_ack_intr(void __iomem *base)
2674 {
2675         writeb(DAC960_BA_ODB_HWMBOX_ACK_IRQ | DAC960_BA_ODB_MMBOX_ACK_IRQ,
2676                base + DAC960_BA_ODB_OFFSET);
2677 }
2678
2679 static inline bool DAC960_BA_hw_mbox_status_available(void __iomem *base)
2680 {
2681         u8 val;
2682
2683         val = readb(base + DAC960_BA_ODB_OFFSET);
2684         return val & DAC960_BA_ODB_HWMBOX_STS_AVAIL;
2685 }
2686
2687 static inline void DAC960_BA_enable_intr(void __iomem *base)
2688 {
2689         writeb(~DAC960_BA_IRQMASK_DISABLE_IRQ, base + DAC960_BA_IRQMASK_OFFSET);
2690 }
2691
2692 static inline void DAC960_BA_disable_intr(void __iomem *base)
2693 {
2694         writeb(0xFF, base + DAC960_BA_IRQMASK_OFFSET);
2695 }
2696
2697 static inline void DAC960_BA_write_cmd_mbox(union myrs_cmd_mbox *mem_mbox,
2698                 union myrs_cmd_mbox *mbox)
2699 {
2700         memcpy(&mem_mbox->words[1], &mbox->words[1],
2701                sizeof(union myrs_cmd_mbox) - sizeof(unsigned int));
2702         /* Barrier to avoid reordering */
2703         wmb();
2704         mem_mbox->words[0] = mbox->words[0];
2705         /* Barrier to force PCI access */
2706         mb();
2707 }
2708
2709
2710 static inline void DAC960_BA_write_hw_mbox(void __iomem *base,
2711                 dma_addr_t cmd_mbox_addr)
2712 {
2713         dma_addr_writeql(cmd_mbox_addr, base + DAC960_BA_CMDMBX_OFFSET);
2714 }
2715
2716 static inline unsigned char DAC960_BA_read_cmd_status(void __iomem *base)
2717 {
2718         return readw(base + DAC960_BA_CMDSTS_OFFSET + 2);
2719 }
2720
2721 static inline bool
2722 DAC960_BA_read_error_status(void __iomem *base, unsigned char *error,
2723                 unsigned char *param0, unsigned char *param1)
2724 {
2725         u8 val;
2726
2727         val = readb(base + DAC960_BA_ERRSTS_OFFSET);
2728         if (!(val & DAC960_BA_ERRSTS_PENDING))
2729                 return false;
2730         val &= ~DAC960_BA_ERRSTS_PENDING;
2731         *error = val;
2732         *param0 = readb(base + DAC960_BA_CMDMBX_OFFSET + 0);
2733         *param1 = readb(base + DAC960_BA_CMDMBX_OFFSET + 1);
2734         writeb(0xFF, base + DAC960_BA_ERRSTS_OFFSET);
2735         return true;
2736 }
2737
2738 static inline unsigned char
2739 DAC960_BA_mbox_init(void __iomem *base, dma_addr_t mbox_addr)
2740 {
2741         unsigned char status;
2742
2743         while (DAC960_BA_hw_mbox_is_full(base))
2744                 udelay(1);
2745         DAC960_BA_write_hw_mbox(base, mbox_addr);
2746         DAC960_BA_hw_mbox_new_cmd(base);
2747         while (!DAC960_BA_hw_mbox_status_available(base))
2748                 udelay(1);
2749         status = DAC960_BA_read_cmd_status(base);
2750         DAC960_BA_ack_hw_mbox_intr(base);
2751         DAC960_BA_ack_hw_mbox_status(base);
2752
2753         return status;
2754 }
2755
2756 static int DAC960_BA_hw_init(struct pci_dev *pdev,
2757                 struct myrs_hba *cs, void __iomem *base)
2758 {
2759         int timeout = 0;
2760         unsigned char status, parm0, parm1;
2761
2762         DAC960_BA_disable_intr(base);
2763         DAC960_BA_ack_hw_mbox_status(base);
2764         udelay(1000);
2765         while (DAC960_BA_init_in_progress(base) &&
2766                timeout < MYRS_MAILBOX_TIMEOUT) {
2767                 if (DAC960_BA_read_error_status(base, &status,
2768                                               &parm0, &parm1) &&
2769                     myrs_err_status(cs, status, parm0, parm1))
2770                         return -EIO;
2771                 udelay(10);
2772                 timeout++;
2773         }
2774         if (timeout == MYRS_MAILBOX_TIMEOUT) {
2775                 dev_err(&pdev->dev,
2776                         "Timeout waiting for Controller Initialisation\n");
2777                 return -ETIMEDOUT;
2778         }
2779         if (!myrs_enable_mmio_mbox(cs, DAC960_BA_mbox_init)) {
2780                 dev_err(&pdev->dev,
2781                         "Unable to Enable Memory Mailbox Interface\n");
2782                 DAC960_BA_reset_ctrl(base);
2783                 return -EAGAIN;
2784         }
2785         DAC960_BA_enable_intr(base);
2786         cs->write_cmd_mbox = DAC960_BA_write_cmd_mbox;
2787         cs->get_cmd_mbox = DAC960_BA_mem_mbox_new_cmd;
2788         cs->disable_intr = DAC960_BA_disable_intr;
2789         cs->reset = DAC960_BA_reset_ctrl;
2790         return 0;
2791 }
2792
2793 static irqreturn_t DAC960_BA_intr_handler(int irq, void *arg)
2794 {
2795         struct myrs_hba *cs = arg;
2796         void __iomem *base = cs->io_base;
2797         struct myrs_stat_mbox *next_stat_mbox;
2798         unsigned long flags;
2799
2800         spin_lock_irqsave(&cs->queue_lock, flags);
2801         DAC960_BA_ack_intr(base);
2802         next_stat_mbox = cs->next_stat_mbox;
2803         while (next_stat_mbox->id > 0) {
2804                 unsigned short id = next_stat_mbox->id;
2805                 struct scsi_cmnd *scmd = NULL;
2806                 struct myrs_cmdblk *cmd_blk = NULL;
2807
2808                 if (id == MYRS_DCMD_TAG)
2809                         cmd_blk = &cs->dcmd_blk;
2810                 else if (id == MYRS_MCMD_TAG)
2811                         cmd_blk = &cs->mcmd_blk;
2812                 else {
2813                         scmd = scsi_host_find_tag(cs->host, id - 3);
2814                         if (scmd)
2815                                 cmd_blk = scsi_cmd_priv(scmd);
2816                 }
2817                 if (cmd_blk) {
2818                         cmd_blk->status = next_stat_mbox->status;
2819                         cmd_blk->sense_len = next_stat_mbox->sense_len;
2820                         cmd_blk->residual = next_stat_mbox->residual;
2821                 } else
2822                         dev_err(&cs->pdev->dev,
2823                                 "Unhandled command completion %d\n", id);
2824
2825                 memset(next_stat_mbox, 0, sizeof(struct myrs_stat_mbox));
2826                 if (++next_stat_mbox > cs->last_stat_mbox)
2827                         next_stat_mbox = cs->first_stat_mbox;
2828
2829                 if (cmd_blk) {
2830                         if (id < 3)
2831                                 myrs_handle_cmdblk(cs, cmd_blk);
2832                         else
2833                                 myrs_handle_scsi(cs, cmd_blk, scmd);
2834                 }
2835         }
2836         cs->next_stat_mbox = next_stat_mbox;
2837         spin_unlock_irqrestore(&cs->queue_lock, flags);
2838         return IRQ_HANDLED;
2839 }
2840
2841 static struct myrs_privdata DAC960_BA_privdata = {
2842         .hw_init =              DAC960_BA_hw_init,
2843         .irq_handler =          DAC960_BA_intr_handler,
2844         .mmio_size =            DAC960_BA_mmio_size,
2845 };
2846
2847 /*
2848  * DAC960 LP Series Controllers.
2849  */
2850
2851 static inline void DAC960_LP_hw_mbox_new_cmd(void __iomem *base)
2852 {
2853         writeb(DAC960_LP_IDB_HWMBOX_NEW_CMD, base + DAC960_LP_IDB_OFFSET);
2854 }
2855
2856 static inline void DAC960_LP_ack_hw_mbox_status(void __iomem *base)
2857 {
2858         writeb(DAC960_LP_IDB_HWMBOX_ACK_STS, base + DAC960_LP_IDB_OFFSET);
2859 }
2860
2861 static inline void DAC960_LP_reset_ctrl(void __iomem *base)
2862 {
2863         writeb(DAC960_LP_IDB_CTRL_RESET, base + DAC960_LP_IDB_OFFSET);
2864 }
2865
2866 static inline void DAC960_LP_mem_mbox_new_cmd(void __iomem *base)
2867 {
2868         writeb(DAC960_LP_IDB_MMBOX_NEW_CMD, base + DAC960_LP_IDB_OFFSET);
2869 }
2870
2871 static inline bool DAC960_LP_hw_mbox_is_full(void __iomem *base)
2872 {
2873         u8 val;
2874
2875         val = readb(base + DAC960_LP_IDB_OFFSET);
2876         return val & DAC960_LP_IDB_HWMBOX_FULL;
2877 }
2878
2879 static inline bool DAC960_LP_init_in_progress(void __iomem *base)
2880 {
2881         u8 val;
2882
2883         val = readb(base + DAC960_LP_IDB_OFFSET);
2884         return val & DAC960_LP_IDB_INIT_IN_PROGRESS;
2885 }
2886
2887 static inline void DAC960_LP_ack_hw_mbox_intr(void __iomem *base)
2888 {
2889         writeb(DAC960_LP_ODB_HWMBOX_ACK_IRQ, base + DAC960_LP_ODB_OFFSET);
2890 }
2891
2892 static inline void DAC960_LP_ack_intr(void __iomem *base)
2893 {
2894         writeb(DAC960_LP_ODB_HWMBOX_ACK_IRQ | DAC960_LP_ODB_MMBOX_ACK_IRQ,
2895                base + DAC960_LP_ODB_OFFSET);
2896 }
2897
2898 static inline bool DAC960_LP_hw_mbox_status_available(void __iomem *base)
2899 {
2900         u8 val;
2901
2902         val = readb(base + DAC960_LP_ODB_OFFSET);
2903         return val & DAC960_LP_ODB_HWMBOX_STS_AVAIL;
2904 }
2905
2906 static inline void DAC960_LP_enable_intr(void __iomem *base)
2907 {
2908         writeb(~DAC960_LP_IRQMASK_DISABLE_IRQ, base + DAC960_LP_IRQMASK_OFFSET);
2909 }
2910
2911 static inline void DAC960_LP_disable_intr(void __iomem *base)
2912 {
2913         writeb(0xFF, base + DAC960_LP_IRQMASK_OFFSET);
2914 }
2915
2916 static inline void DAC960_LP_write_cmd_mbox(union myrs_cmd_mbox *mem_mbox,
2917                 union myrs_cmd_mbox *mbox)
2918 {
2919         memcpy(&mem_mbox->words[1], &mbox->words[1],
2920                sizeof(union myrs_cmd_mbox) - sizeof(unsigned int));
2921         /* Barrier to avoid reordering */
2922         wmb();
2923         mem_mbox->words[0] = mbox->words[0];
2924         /* Barrier to force PCI access */
2925         mb();
2926 }
2927
2928 static inline void DAC960_LP_write_hw_mbox(void __iomem *base,
2929                 dma_addr_t cmd_mbox_addr)
2930 {
2931         dma_addr_writeql(cmd_mbox_addr, base + DAC960_LP_CMDMBX_OFFSET);
2932 }
2933
2934 static inline unsigned char DAC960_LP_read_cmd_status(void __iomem *base)
2935 {
2936         return readw(base + DAC960_LP_CMDSTS_OFFSET + 2);
2937 }
2938
2939 static inline bool
2940 DAC960_LP_read_error_status(void __iomem *base, unsigned char *error,
2941                 unsigned char *param0, unsigned char *param1)
2942 {
2943         u8 val;
2944
2945         val = readb(base + DAC960_LP_ERRSTS_OFFSET);
2946         if (!(val & DAC960_LP_ERRSTS_PENDING))
2947                 return false;
2948         val &= ~DAC960_LP_ERRSTS_PENDING;
2949         *error = val;
2950         *param0 = readb(base + DAC960_LP_CMDMBX_OFFSET + 0);
2951         *param1 = readb(base + DAC960_LP_CMDMBX_OFFSET + 1);
2952         writeb(0xFF, base + DAC960_LP_ERRSTS_OFFSET);
2953         return true;
2954 }
2955
2956 static inline unsigned char
2957 DAC960_LP_mbox_init(void __iomem *base, dma_addr_t mbox_addr)
2958 {
2959         unsigned char status;
2960
2961         while (DAC960_LP_hw_mbox_is_full(base))
2962                 udelay(1);
2963         DAC960_LP_write_hw_mbox(base, mbox_addr);
2964         DAC960_LP_hw_mbox_new_cmd(base);
2965         while (!DAC960_LP_hw_mbox_status_available(base))
2966                 udelay(1);
2967         status = DAC960_LP_read_cmd_status(base);
2968         DAC960_LP_ack_hw_mbox_intr(base);
2969         DAC960_LP_ack_hw_mbox_status(base);
2970
2971         return status;
2972 }
2973
2974 static int DAC960_LP_hw_init(struct pci_dev *pdev,
2975                 struct myrs_hba *cs, void __iomem *base)
2976 {
2977         int timeout = 0;
2978         unsigned char status, parm0, parm1;
2979
2980         DAC960_LP_disable_intr(base);
2981         DAC960_LP_ack_hw_mbox_status(base);
2982         udelay(1000);
2983         while (DAC960_LP_init_in_progress(base) &&
2984                timeout < MYRS_MAILBOX_TIMEOUT) {
2985                 if (DAC960_LP_read_error_status(base, &status,
2986                                               &parm0, &parm1) &&
2987                     myrs_err_status(cs, status, parm0, parm1))
2988                         return -EIO;
2989                 udelay(10);
2990                 timeout++;
2991         }
2992         if (timeout == MYRS_MAILBOX_TIMEOUT) {
2993                 dev_err(&pdev->dev,
2994                         "Timeout waiting for Controller Initialisation\n");
2995                 return -ETIMEDOUT;
2996         }
2997         if (!myrs_enable_mmio_mbox(cs, DAC960_LP_mbox_init)) {
2998                 dev_err(&pdev->dev,
2999                         "Unable to Enable Memory Mailbox Interface\n");
3000                 DAC960_LP_reset_ctrl(base);
3001                 return -ENODEV;
3002         }
3003         DAC960_LP_enable_intr(base);
3004         cs->write_cmd_mbox = DAC960_LP_write_cmd_mbox;
3005         cs->get_cmd_mbox = DAC960_LP_mem_mbox_new_cmd;
3006         cs->disable_intr = DAC960_LP_disable_intr;
3007         cs->reset = DAC960_LP_reset_ctrl;
3008
3009         return 0;
3010 }
3011
3012 static irqreturn_t DAC960_LP_intr_handler(int irq, void *arg)
3013 {
3014         struct myrs_hba *cs = arg;
3015         void __iomem *base = cs->io_base;
3016         struct myrs_stat_mbox *next_stat_mbox;
3017         unsigned long flags;
3018
3019         spin_lock_irqsave(&cs->queue_lock, flags);
3020         DAC960_LP_ack_intr(base);
3021         next_stat_mbox = cs->next_stat_mbox;
3022         while (next_stat_mbox->id > 0) {
3023                 unsigned short id = next_stat_mbox->id;
3024                 struct scsi_cmnd *scmd = NULL;
3025                 struct myrs_cmdblk *cmd_blk = NULL;
3026
3027                 if (id == MYRS_DCMD_TAG)
3028                         cmd_blk = &cs->dcmd_blk;
3029                 else if (id == MYRS_MCMD_TAG)
3030                         cmd_blk = &cs->mcmd_blk;
3031                 else {
3032                         scmd = scsi_host_find_tag(cs->host, id - 3);
3033                         if (scmd)
3034                                 cmd_blk = scsi_cmd_priv(scmd);
3035                 }
3036                 if (cmd_blk) {
3037                         cmd_blk->status = next_stat_mbox->status;
3038                         cmd_blk->sense_len = next_stat_mbox->sense_len;
3039                         cmd_blk->residual = next_stat_mbox->residual;
3040                 } else
3041                         dev_err(&cs->pdev->dev,
3042                                 "Unhandled command completion %d\n", id);
3043
3044                 memset(next_stat_mbox, 0, sizeof(struct myrs_stat_mbox));
3045                 if (++next_stat_mbox > cs->last_stat_mbox)
3046                         next_stat_mbox = cs->first_stat_mbox;
3047
3048                 if (cmd_blk) {
3049                         if (id < 3)
3050                                 myrs_handle_cmdblk(cs, cmd_blk);
3051                         else
3052                                 myrs_handle_scsi(cs, cmd_blk, scmd);
3053                 }
3054         }
3055         cs->next_stat_mbox = next_stat_mbox;
3056         spin_unlock_irqrestore(&cs->queue_lock, flags);
3057         return IRQ_HANDLED;
3058 }
3059
3060 static struct myrs_privdata DAC960_LP_privdata = {
3061         .hw_init =              DAC960_LP_hw_init,
3062         .irq_handler =          DAC960_LP_intr_handler,
3063         .mmio_size =            DAC960_LP_mmio_size,
3064 };
3065
3066 /*
3067  * Module functions
3068  */
3069 static int
3070 myrs_probe(struct pci_dev *dev, const struct pci_device_id *entry)
3071 {
3072         struct myrs_hba *cs;
3073         int ret;
3074
3075         cs = myrs_detect(dev, entry);
3076         if (!cs)
3077                 return -ENODEV;
3078
3079         ret = myrs_get_config(cs);
3080         if (ret < 0) {
3081                 myrs_cleanup(cs);
3082                 return ret;
3083         }
3084
3085         if (!myrs_create_mempools(dev, cs)) {
3086                 ret = -ENOMEM;
3087                 goto failed;
3088         }
3089
3090         ret = scsi_add_host(cs->host, &dev->dev);
3091         if (ret) {
3092                 dev_err(&dev->dev, "scsi_add_host failed with %d\n", ret);
3093                 myrs_destroy_mempools(cs);
3094                 goto failed;
3095         }
3096         scsi_scan_host(cs->host);
3097         return 0;
3098 failed:
3099         myrs_cleanup(cs);
3100         return ret;
3101 }
3102
3103
3104 static void myrs_remove(struct pci_dev *pdev)
3105 {
3106         struct myrs_hba *cs = pci_get_drvdata(pdev);
3107
3108         if (cs == NULL)
3109                 return;
3110
3111         shost_printk(KERN_NOTICE, cs->host, "Flushing Cache...");
3112         myrs_flush_cache(cs);
3113         myrs_destroy_mempools(cs);
3114         myrs_cleanup(cs);
3115 }
3116
3117
3118 static const struct pci_device_id myrs_id_table[] = {
3119         {
3120                 PCI_DEVICE_SUB(PCI_VENDOR_ID_MYLEX,
3121                                PCI_DEVICE_ID_MYLEX_DAC960_GEM,
3122                                PCI_VENDOR_ID_MYLEX, PCI_ANY_ID),
3123                 .driver_data    = (unsigned long) &DAC960_GEM_privdata,
3124         },
3125         {
3126                 PCI_DEVICE_DATA(MYLEX, DAC960_BA, &DAC960_BA_privdata),
3127         },
3128         {
3129                 PCI_DEVICE_DATA(MYLEX, DAC960_LP, &DAC960_LP_privdata),
3130         },
3131         {0, },
3132 };
3133
3134 MODULE_DEVICE_TABLE(pci, myrs_id_table);
3135
3136 static struct pci_driver myrs_pci_driver = {
3137         .name           = "myrs",
3138         .id_table       = myrs_id_table,
3139         .probe          = myrs_probe,
3140         .remove         = myrs_remove,
3141 };
3142
3143 static int __init myrs_init_module(void)
3144 {
3145         int ret;
3146
3147         myrs_raid_template = raid_class_attach(&myrs_raid_functions);
3148         if (!myrs_raid_template)
3149                 return -ENODEV;
3150
3151         ret = pci_register_driver(&myrs_pci_driver);
3152         if (ret)
3153                 raid_class_release(myrs_raid_template);
3154
3155         return ret;
3156 }
3157
3158 static void __exit myrs_cleanup_module(void)
3159 {
3160         pci_unregister_driver(&myrs_pci_driver);
3161         raid_class_release(myrs_raid_template);
3162 }
3163
3164 module_init(myrs_init_module);
3165 module_exit(myrs_cleanup_module);
3166
3167 MODULE_DESCRIPTION("Mylex DAC960/AcceleRAID/eXtremeRAID driver (SCSI Interface)");
3168 MODULE_AUTHOR("Hannes Reinecke <hare@suse.com>");
3169 MODULE_LICENSE("GPL");