drivers/scsi/dc395x.c

   1 /*
   2  * dc395x.c
   3  *
   4  * Device Driver for Tekram DC395(U/UW/F), DC315(U)
   5  * PCI SCSI Bus Master Host Adapter
   6  * (SCSI chip set used Tekram ASIC TRM-S1040)
   7  *
   8  * Authors:
   9  *  C.L. Huang <ching@tekram.com.tw>
  10  *  Erich Chen <erich@tekram.com.tw>
  11  *  (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
  12  *
  13  *  Kurt Garloff <garloff@suse.de>
  14  *  (C) 1999-2000 Kurt Garloff
  15  *
  16  *  Oliver Neukum <oliver@neukum.name>
  17  *  Ali Akcaagac <aliakc@web.de>
  18  *  Jamie Lenehan <lenehan@twibble.org>
  19  *  (C) 2003
  20  *
  21  * License: GNU GPL
  22  *
  23  *************************************************************************
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the above copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. The name of the author may not be used to endorse or promote products
  34  *    derived from this software without specific prior written permission.
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  37  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  38  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  39  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  40  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  42  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  43  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  44  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  45  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  46  *
  47  ************************************************************************
  48  */
  49 #include <linux/module.h>
  50 #include <linux/moduleparam.h>
  51 #include <linux/delay.h>
  52 #include <linux/ctype.h>
  53 #include <linux/blkdev.h>
  54 #include <linux/interrupt.h>
  55 #include <linux/init.h>
  56 #include <linux/spinlock.h>
  57 #include <linux/pci.h>
  58 #include <linux/list.h>
  59 #include <linux/vmalloc.h>
  60 #include <linux/slab.h>
  61 #include <asm/io.h>
  62
  63 #include <scsi/scsi.h>
  64 #include <scsi/scsi_cmnd.h>
  65 #include <scsi/scsi_device.h>
  66 #include <scsi/scsi_host.h>
  67 #include <scsi/scsi_transport_spi.h>
  68
  69 #include "dc395x.h"
  70
  71 #define DC395X_NAME     "dc395x"
  72 #define DC395X_BANNER   "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
  73 #define DC395X_VERSION  "v2.05, 2004/03/08"
  74
  75 /*---------------------------------------------------------------------------
  76                                   Features
  77  ---------------------------------------------------------------------------*/
  78 /*
  79  * Set to disable parts of the driver
  80  */
  81 /*#define DC395x_NO_DISCONNECT*/
  82 /*#define DC395x_NO_TAGQ*/
  83 /*#define DC395x_NO_SYNC*/
  84 /*#define DC395x_NO_WIDE*/
  85
  86 /*---------------------------------------------------------------------------
  87                                   Debugging
  88  ---------------------------------------------------------------------------*/
  89 /*
  90  * Types of debugging that can be enabled and disabled
  91  */
  92 #define DBG_KG          0x0001
  93 #define DBG_0           0x0002
  94 #define DBG_1           0x0004
  95 #define DBG_SG          0x0020
  96 #define DBG_FIFO        0x0040
  97 #define DBG_PIO         0x0080
  98
  99
 100 /*
 101  * Set set of things to output debugging for.
 102  * Undefine to remove all debugging
 103  */
 104 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
 105 /*#define  DEBUG_MASK   DBG_0*/
 106
 107
 108 /*
 109  * Output a kernel mesage at the specified level and append the
 110  * driver name and a ": " to the start of the message
 111  */
 112 #define dprintkl(level, format, arg...)  \
 113     printk(level DC395X_NAME ": " format , ## arg)
 114
 115
 116 #ifdef DEBUG_MASK
 117 /*
 118  * print a debug message - this is formated with KERN_DEBUG, then the
 119  * driver name followed by a ": " and then the message is output.
 120  * This also checks that the specified debug level is enabled before
 121  * outputing the message
 122  */
 123 #define dprintkdbg(type, format, arg...) \
 124         do { \
 125                 if ((type) & (DEBUG_MASK)) \
 126                         dprintkl(KERN_DEBUG , format , ## arg); \
 127         } while (0)
 128
 129 /*
 130  * Check if the specified type of debugging is enabled
 131  */
 132 #define debug_enabled(type)     ((DEBUG_MASK) & (type))
 133
 134 #else
 135 /*
 136  * No debugging. Do nothing
 137  */
 138 #define dprintkdbg(type, format, arg...) \
 139         do {} while (0)
 140 #define debug_enabled(type)     (0)
 141
 142 #endif
 143
 144
 145 #ifndef PCI_VENDOR_ID_TEKRAM
 146 #define PCI_VENDOR_ID_TEKRAM                    0x1DE1  /* Vendor ID    */
 147 #endif
 148 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
 149 #define PCI_DEVICE_ID_TEKRAM_TRMS1040           0x0391  /* Device ID    */
 150 #endif
 151
 152
 153 #define DC395x_LOCK_IO(dev,flags)               spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
 154 #define DC395x_UNLOCK_IO(dev,flags)             spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
 155
 156 #define DC395x_read8(acb,address)               (u8)(inb(acb->io_port_base + (address)))
 157 #define DC395x_read16(acb,address)              (u16)(inw(acb->io_port_base + (address)))
 158 #define DC395x_read32(acb,address)              (u32)(inl(acb->io_port_base + (address)))
 159 #define DC395x_write8(acb,address,value)        outb((value), acb->io_port_base + (address))
 160 #define DC395x_write16(acb,address,value)       outw((value), acb->io_port_base + (address))
 161 #define DC395x_write32(acb,address,value)       outl((value), acb->io_port_base + (address))
 162
 163 #define TAG_NONE 255
 164
 165 /*
 166  * srb->segement_x is the hw sg list. It is always allocated as a
 167  * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
 168  * cross a page boundy.
 169  */
 170 #define SEGMENTX_LEN    (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
 171
 172
 173 struct SGentry {
 174         u32 address;            /* bus! address */
 175         u32 length;
 176 };
 177
 178 /* The SEEPROM structure for TRM_S1040 */
 179 struct NVRamTarget {
 180         u8 cfg0;                /* Target configuration byte 0  */
 181         u8 period;              /* Target period                */
 182         u8 cfg2;                /* Target configuration byte 2  */
 183         u8 cfg3;                /* Target configuration byte 3  */
 184 };
 185
 186 struct NvRamType {
 187         u8 sub_vendor_id[2];    /* 0,1  Sub Vendor ID   */
 188         u8 sub_sys_id[2];       /* 2,3  Sub System ID   */
 189         u8 sub_class;           /* 4    Sub Class       */
 190         u8 vendor_id[2];        /* 5,6  Vendor ID       */
 191         u8 device_id[2];        /* 7,8  Device ID       */
 192         u8 reserved;            /* 9    Reserved        */
 193         struct NVRamTarget target[DC395x_MAX_SCSI_ID];
 194                                                 /** 10,11,12,13
 195                                                  ** 14,15,16,17
 196                                                  ** ....
 197                                                  ** ....
 198                                                  ** 70,71,72,73
 199                                                  */
 200         u8 scsi_id;             /* 74 Host Adapter SCSI ID      */
 201         u8 channel_cfg;         /* 75 Channel configuration     */
 202         u8 delay_time;          /* 76 Power on delay time       */
 203         u8 max_tag;             /* 77 Maximum tags              */
 204         u8 reserved0;           /* 78  */
 205         u8 boot_target;         /* 79  */
 206         u8 boot_lun;            /* 80  */
 207         u8 reserved1;           /* 81  */
 208         u16 reserved2[22];      /* 82,..125 */
 209         u16 cksum;              /* 126,127 */
 210 };
 211
 212 struct ScsiReqBlk {
 213         struct list_head list;          /* next/prev ptrs for srb lists */
 214         struct DeviceCtlBlk *dcb;
 215         struct scsi_cmnd *cmd;
 216
 217         struct SGentry *segment_x;      /* Linear array of hw sg entries (up to 64 entries) */
 218         dma_addr_t sg_bus_addr;         /* Bus address of sg list (ie, of segment_x) */
 219
 220         u8 sg_count;                    /* No of HW sg entries for this request */
 221         u8 sg_index;                    /* Index of HW sg entry for this request */
 222         size_t total_xfer_length;       /* Total number of bytes remaining to be transferred */
 223         size_t request_length;          /* Total number of bytes in this request */
 224         /*
 225          * The sense buffer handling function, request_sense, uses
 226          * the first hw sg entry (segment_x[0]) and the transfer
 227          * length (total_xfer_length). While doing this it stores the
 228          * original values into the last sg hw list
 229          * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
 230          * total_xfer_length in xferred. These values are restored in
 231          * pci_unmap_srb_sense. This is the only place xferred is used.
 232          */
 233         size_t xferred;                 /* Saved copy of total_xfer_length */
 234
 235         u16 state;
 236
 237         u8 msgin_buf[6];
 238         u8 msgout_buf[6];
 239
 240         u8 adapter_status;
 241         u8 target_status;
 242         u8 msg_count;
 243         u8 end_message;
 244
 245         u8 tag_number;
 246         u8 status;
 247         u8 retry_count;
 248         u8 flag;
 249
 250         u8 scsi_phase;
 251 };
 252
 253 struct DeviceCtlBlk {
 254         struct list_head list;          /* next/prev ptrs for the dcb list */
 255         struct AdapterCtlBlk *acb;
 256         struct list_head srb_going_list;        /* head of going srb list */
 257         struct list_head srb_waiting_list;      /* head of waiting srb list */
 258
 259         struct ScsiReqBlk *active_srb;
 260         u32 tag_mask;
 261
 262         u16 max_command;
 263
 264         u8 target_id;           /* SCSI Target ID  (SCSI Only) */
 265         u8 target_lun;          /* SCSI Log.  Unit (SCSI Only) */
 266         u8 identify_msg;
 267         u8 dev_mode;
 268
 269         u8 inquiry7;            /* To store Inquiry flags */
 270         u8 sync_mode;           /* 0:async mode */
 271         u8 min_nego_period;     /* for nego. */
 272         u8 sync_period;         /* for reg.  */
 273
 274         u8 sync_offset;         /* for reg. and nego.(low nibble) */
 275         u8 flag;
 276         u8 dev_type;
 277         u8 init_tcq_flag;
 278 };
 279
 280 struct AdapterCtlBlk {
 281         struct Scsi_Host *scsi_host;
 282
 283         unsigned long io_port_base;
 284         unsigned long io_port_len;
 285
 286         struct list_head dcb_list;              /* head of going dcb list */
 287         struct DeviceCtlBlk *dcb_run_robin;
 288         struct DeviceCtlBlk *active_dcb;
 289
 290         struct list_head srb_free_list;         /* head of free srb list */
 291         struct ScsiReqBlk *tmp_srb;
 292         struct timer_list waiting_timer;
 293         struct timer_list selto_timer;
 294
 295         unsigned long last_reset;
 296
 297         u16 srb_count;
 298
 299         u8 sel_timeout;
 300
 301         unsigned int irq_level;
 302         u8 tag_max_num;
 303         u8 acb_flag;
 304         u8 gmode2;
 305
 306         u8 config;
 307         u8 lun_chk;
 308         u8 scan_devices;
 309         u8 hostid_bit;
 310
 311         u8 dcb_map[DC395x_MAX_SCSI_ID];
 312         struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
 313
 314         struct pci_dev *dev;
 315
 316         u8 msg_len;
 317
 318         struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
 319         struct ScsiReqBlk srb;
 320
 321         struct NvRamType eeprom;        /* eeprom settings for this adapter */
 322 };
 323
 324
 325 /*---------------------------------------------------------------------------
 326                             Forward declarations
 327  ---------------------------------------------------------------------------*/
 328 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 329                 u16 *pscsi_status);
 330 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 331                 u16 *pscsi_status);
 332 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 333                 u16 *pscsi_status);
 334 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 335                 u16 *pscsi_status);
 336 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 337                 u16 *pscsi_status);
 338 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 339                 u16 *pscsi_status);
 340 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 341                 u16 *pscsi_status);
 342 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 343                 u16 *pscsi_status);
 344 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 345                 u16 *pscsi_status);
 346 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 347                 u16 *pscsi_status);
 348 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 349                 u16 *pscsi_status);
 350 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 351                 u16 *pscsi_status);
 352 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 353                 u16 *pscsi_status);
 354 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 355                 u16 *pscsi_status);
 356 static void set_basic_config(struct AdapterCtlBlk *acb);
 357 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
 358                 struct ScsiReqBlk *srb);
 359 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
 360 static void data_io_transfer(struct AdapterCtlBlk *acb,
 361                 struct ScsiReqBlk *srb, u16 io_dir);
 362 static void disconnect(struct AdapterCtlBlk *acb);
 363 static void reselect(struct AdapterCtlBlk *acb);
 364 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 365                 struct ScsiReqBlk *srb);
 366 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
 367                 struct ScsiReqBlk *srb);
 368 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
 369                 struct ScsiReqBlk *srb);
 370 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
 371                 struct scsi_cmnd *cmd, u8 force);
 372 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
 373 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
 374 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
 375                 struct ScsiReqBlk *srb);
 376 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 377                 struct ScsiReqBlk *srb);
 378 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 379                 struct ScsiReqBlk *srb);
 380 static void set_xfer_rate(struct AdapterCtlBlk *acb,
 381                 struct DeviceCtlBlk *dcb);
 382 static void waiting_timeout(struct timer_list *t);
 383
 384
 385 /*---------------------------------------------------------------------------
 386                                  Static Data
 387  ---------------------------------------------------------------------------*/
 388 static u16 current_sync_offset = 0;
 389
 390 static void *dc395x_scsi_phase0[] = {
 391         data_out_phase0,/* phase:0 */
 392         data_in_phase0, /* phase:1 */
 393         command_phase0, /* phase:2 */
 394         status_phase0,  /* phase:3 */
 395         nop0,           /* phase:4 PH_BUS_FREE .. initial phase */
 396         nop0,           /* phase:5 PH_BUS_FREE .. initial phase */
 397         msgout_phase0,  /* phase:6 */
 398         msgin_phase0,   /* phase:7 */
 399 };
 400
 401 static void *dc395x_scsi_phase1[] = {
 402         data_out_phase1,/* phase:0 */
 403         data_in_phase1, /* phase:1 */
 404         command_phase1, /* phase:2 */
 405         status_phase1,  /* phase:3 */
 406         nop1,           /* phase:4 PH_BUS_FREE .. initial phase */
 407         nop1,           /* phase:5 PH_BUS_FREE .. initial phase */
 408         msgout_phase1,  /* phase:6 */
 409         msgin_phase1,   /* phase:7 */
 410 };
 411
 412 /*
 413  *Fast20:       000      50ns, 20.0 MHz
 414  *              001      75ns, 13.3 MHz
 415  *              010     100ns, 10.0 MHz
 416  *              011     125ns,  8.0 MHz
 417  *              100     150ns,  6.6 MHz
 418  *              101     175ns,  5.7 MHz
 419  *              110     200ns,  5.0 MHz
 420  *              111     250ns,  4.0 MHz
 421  *
 422  *Fast40(LVDS): 000      25ns, 40.0 MHz
 423  *              001      50ns, 20.0 MHz
 424  *              010      75ns, 13.3 MHz
 425  *              011     100ns, 10.0 MHz
 426  *              100     125ns,  8.0 MHz
 427  *              101     150ns,  6.6 MHz
 428  *              110     175ns,  5.7 MHz
 429  *              111     200ns,  5.0 MHz
 430  */
 431 /*static u8     clock_period[] = {12,19,25,31,37,44,50,62};*/
 432
 433 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
 434 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
 435 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
 436
 437
 438 /*---------------------------------------------------------------------------
 439                                 Configuration
 440   ---------------------------------------------------------------------------*/
 441 /*
 442  * Module/boot parameters currently effect *all* instances of the
 443  * card in the system.
 444  */
 445
 446 /*
 447  * Command line parameters are stored in a structure below.
 448  * These are the index's into the structure for the various
 449  * command line options.
 450  */
 451 #define CFG_ADAPTER_ID          0
 452 #define CFG_MAX_SPEED           1
 453 #define CFG_DEV_MODE            2
 454 #define CFG_ADAPTER_MODE        3
 455 #define CFG_TAGS                4
 456 #define CFG_RESET_DELAY         5
 457
 458 #define CFG_NUM                 6       /* number of configuration items */
 459
 460
 461 /*
 462  * Value used to indicate that a command line override
 463  * hasn't been used to modify the value.
 464  */
 465 #define CFG_PARAM_UNSET -1
 466
 467
 468 /*
 469  * Hold command line parameters.
 470  */
 471 struct ParameterData {
 472         int value;              /* value of this setting */
 473         int min;                /* minimum value */
 474         int max;                /* maximum value */
 475         int def;                /* default value */
 476         int safe;               /* safe value */
 477 };
 478 static struct ParameterData cfg_data[] = {
 479         { /* adapter id */
 480                 CFG_PARAM_UNSET,
 481                 0,
 482                 15,
 483                 7,
 484                 7
 485         },
 486         { /* max speed */
 487                 CFG_PARAM_UNSET,
 488                   0,
 489                   7,
 490                   1,    /* 13.3Mhz */
 491                   4,    /*  6.7Hmz */
 492         },
 493         { /* dev mode */
 494                 CFG_PARAM_UNSET,
 495                 0,
 496                 0x3f,
 497                 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
 498                         NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
 499                         NTC_DO_SEND_START,
 500                 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
 501         },
 502         { /* adapter mode */
 503                 CFG_PARAM_UNSET,
 504                 0,
 505                 0x2f,
 506                 NAC_SCANLUN |
 507                 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
 508                         /*| NAC_ACTIVE_NEG*/,
 509                 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
 510         },
 511         { /* tags */
 512                 CFG_PARAM_UNSET,
 513                 0,
 514                 5,
 515                 3,      /* 16 tags (??) */
 516                 2,
 517         },
 518         { /* reset delay */
 519                 CFG_PARAM_UNSET,
 520                 0,
 521                 180,
 522                 1,      /* 1 second */
 523                 10,     /* 10 seconds */
 524         }
 525 };
 526
 527
 528 /*
 529  * Safe settings. If set to zero the BIOS/default values with
 530  * command line overrides will be used. If set to 1 then safe and
 531  * slow settings will be used.
 532  */
 533 static bool use_safe_settings = 0;
 534 module_param_named(safe, use_safe_settings, bool, 0);
 535 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
 536
 537
 538 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
 539 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
 540
 541 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
 542 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
 543
 544 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
 545 MODULE_PARM_DESC(dev_mode, "Device mode.");
 546
 547 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
 548 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
 549
 550 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
 551 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
 552
 553 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
 554 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
 555
 556
 557 /**
 558  * set_safe_settings - if the use_safe_settings option is set then
 559  * set all values to the safe and slow values.
 560  **/
 561 static void set_safe_settings(void)
 562 {
 563         if (use_safe_settings)
 564         {
 565                 int i;
 566
 567                 dprintkl(KERN_INFO, "Using safe settings.\n");
 568                 for (i = 0; i < CFG_NUM; i++)
 569                 {
 570                         cfg_data[i].value = cfg_data[i].safe;
 571                 }
 572         }
 573 }
 574
 575
 576 /**
 577  * fix_settings - reset any boot parameters which are out of range
 578  * back to the default values.
 579  **/
 580 static void fix_settings(void)
 581 {
 582         int i;
 583
 584         dprintkdbg(DBG_1,
 585                 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
 586                 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
 587                 cfg_data[CFG_ADAPTER_ID].value,
 588                 cfg_data[CFG_MAX_SPEED].value,
 589                 cfg_data[CFG_DEV_MODE].value,
 590                 cfg_data[CFG_ADAPTER_MODE].value,
 591                 cfg_data[CFG_TAGS].value,
 592                 cfg_data[CFG_RESET_DELAY].value);
 593         for (i = 0; i < CFG_NUM; i++)
 594         {
 595                 if (cfg_data[i].value < cfg_data[i].min
 596                     || cfg_data[i].value > cfg_data[i].max)
 597                         cfg_data[i].value = cfg_data[i].def;
 598         }
 599 }
 600
 601
 602
 603 /*
 604  * Mapping from the eeprom delay index value (index into this array)
 605  * to the number of actual seconds that the delay should be for.
 606  */
 607 static char eeprom_index_to_delay_map[] =
 608         { 1, 3, 5, 10, 16, 30, 60, 120 };
 609
 610
 611 /**
 612  * eeprom_index_to_delay - Take the eeprom delay setting and convert it
 613  * into a number of seconds.
 614  *
 615  * @eeprom: The eeprom structure in which we find the delay index to map.
 616  **/
 617 static void eeprom_index_to_delay(struct NvRamType *eeprom)
 618 {
 619         eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
 620 }
 621
 622
 623 /**
 624  * delay_to_eeprom_index - Take a delay in seconds and return the
 625  * closest eeprom index which will delay for at least that amount of
 626  * seconds.
 627  *
 628  * @delay: The delay, in seconds, to find the eeprom index for.
 629  **/
 630 static int delay_to_eeprom_index(int delay)
 631 {
 632         u8 idx = 0;
 633         while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
 634                 idx++;
 635         return idx;
 636 }
 637
 638
 639 /**
 640  * eeprom_override - Override the eeprom settings, in the provided
 641  * eeprom structure, with values that have been set on the command
 642  * line.
 643  *
 644  * @eeprom: The eeprom data to override with command line options.
 645  **/
 646 static void eeprom_override(struct NvRamType *eeprom)
 647 {
 648         u8 id;
 649
 650         /* Adapter Settings */
 651         if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
 652                 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
 653
 654         if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
 655                 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
 656
 657         if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
 658                 eeprom->delay_time = delay_to_eeprom_index(
 659                                         cfg_data[CFG_RESET_DELAY].value);
 660
 661         if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
 662                 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
 663
 664         /* Device Settings */
 665         for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
 666                 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
 667                         eeprom->target[id].cfg0 =
 668                                 (u8)cfg_data[CFG_DEV_MODE].value;
 669
 670                 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
 671                         eeprom->target[id].period =
 672                                 (u8)cfg_data[CFG_MAX_SPEED].value;
 673
 674         }
 675 }
 676
 677
 678 /*---------------------------------------------------------------------------
 679  ---------------------------------------------------------------------------*/
 680
 681 static unsigned int list_size(struct list_head *head)
 682 {
 683         unsigned int count = 0;
 684         struct list_head *pos;
 685         list_for_each(pos, head)
 686                 count++;
 687         return count;
 688 }
 689
 690
 691 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
 692                 struct DeviceCtlBlk *pos)
 693 {
 694         int use_next = 0;
 695         struct DeviceCtlBlk* next = NULL;
 696         struct DeviceCtlBlk* i;
 697
 698         if (list_empty(head))
 699                 return NULL;
 700
 701         /* find supplied dcb and then select the next one */
 702         list_for_each_entry(i, head, list)
 703                 if (use_next) {
 704                         next = i;
 705                         break;
 706                 } else if (i == pos) {
 707                         use_next = 1;
 708                 }
 709         /* if no next one take the head one (ie, wraparound) */
 710         if (!next)
 711                 list_for_each_entry(i, head, list) {
 712                         next = i;
 713                         break;
 714                 }
 715
 716         return next;
 717 }
 718
 719
 720 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
 721 {
 722         if (srb->tag_number < 255) {
 723                 dcb->tag_mask &= ~(1 << srb->tag_number);       /* free tag mask */
 724                 srb->tag_number = 255;
 725         }
 726 }
 727
 728
 729 /* Find cmd in SRB list */
 730 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
 731                 struct list_head *head)
 732 {
 733         struct ScsiReqBlk *i;
 734         list_for_each_entry(i, head, list)
 735                 if (i->cmd == cmd)
 736                         return i;
 737         return NULL;
 738 }
 739
 740 /* Sets the timer to wake us up */
 741 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
 742 {
 743         if (timer_pending(&acb->waiting_timer))
 744                 return;
 745         if (time_before(jiffies + to, acb->last_reset - HZ / 2))
 746                 acb->waiting_timer.expires =
 747                     acb->last_reset - HZ / 2 + 1;
 748         else
 749                 acb->waiting_timer.expires = jiffies + to + 1;
 750         add_timer(&acb->waiting_timer);
 751 }
 752
 753
 754 /* Send the next command from the waiting list to the bus */
 755 static void waiting_process_next(struct AdapterCtlBlk *acb)
 756 {
 757         struct DeviceCtlBlk *start = NULL;
 758         struct DeviceCtlBlk *pos;
 759         struct DeviceCtlBlk *dcb;
 760         struct ScsiReqBlk *srb;
 761         struct list_head *dcb_list_head = &acb->dcb_list;
 762
 763         if (acb->active_dcb
 764             || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
 765                 return;
 766
 767         if (timer_pending(&acb->waiting_timer))
 768                 del_timer(&acb->waiting_timer);
 769
 770         if (list_empty(dcb_list_head))
 771                 return;
 772
 773         /*
 774          * Find the starting dcb. Need to find it again in the list
 775          * since the list may have changed since we set the ptr to it
 776          */
 777         list_for_each_entry(dcb, dcb_list_head, list)
 778                 if (dcb == acb->dcb_run_robin) {
 779                         start = dcb;
 780                         break;
 781                 }
 782         if (!start) {
 783                 /* This can happen! */
 784                 start = list_entry(dcb_list_head->next, typeof(*start), list);
 785                 acb->dcb_run_robin = start;
 786         }
 787
 788
 789         /*
 790          * Loop over the dcb, but we start somewhere (potentially) in
 791          * the middle of the loop so we need to manully do this.
 792          */
 793         pos = start;
 794         do {
 795                 struct list_head *waiting_list_head = &pos->srb_waiting_list;
 796
 797                 /* Make sure, the next another device gets scheduled ... */
 798                 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
 799                                                   acb->dcb_run_robin);
 800
 801                 if (list_empty(waiting_list_head) ||
 802                     pos->max_command <= list_size(&pos->srb_going_list)) {
 803                         /* move to next dcb */
 804                         pos = dcb_get_next(dcb_list_head, pos);
 805                 } else {
 806                         srb = list_entry(waiting_list_head->next,
 807                                          struct ScsiReqBlk, list);
 808
 809                         /* Try to send to the bus */
 810                         if (!start_scsi(acb, pos, srb))
 811                                 list_move(&srb->list, &pos->srb_going_list);
 812                         else
 813                                 waiting_set_timer(acb, HZ/50);
 814                         break;
 815                 }
 816         } while (pos != start);
 817 }
 818
 819
 820 /* Wake up waiting queue */
 821 static void waiting_timeout(struct timer_list *t)
 822 {
 823         unsigned long flags;
 824         struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer);
 825         dprintkdbg(DBG_1,
 826                 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
 827         DC395x_LOCK_IO(acb->scsi_host, flags);
 828         waiting_process_next(acb);
 829         DC395x_UNLOCK_IO(acb->scsi_host, flags);
 830 }
 831
 832
 833 /* Get the DCB for a given ID/LUN combination */
 834 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
 835 {
 836         return acb->children[id][lun];
 837 }
 838
 839
 840 /* Send SCSI Request Block (srb) to adapter (acb) */
 841 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
 842 {
 843         struct DeviceCtlBlk *dcb = srb->dcb;
 844
 845         if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
 846             acb->active_dcb ||
 847             (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
 848                 list_add_tail(&srb->list, &dcb->srb_waiting_list);
 849                 waiting_process_next(acb);
 850                 return;
 851         }
 852
 853         if (!start_scsi(acb, dcb, srb)) {
 854                 list_add_tail(&srb->list, &dcb->srb_going_list);
 855         } else {
 856                 list_add(&srb->list, &dcb->srb_waiting_list);
 857                 waiting_set_timer(acb, HZ / 50);
 858         }
 859 }
 860
 861 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
 862 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
 863                 struct ScsiReqBlk *srb)
 864 {
 865         int nseg;
 866         enum dma_data_direction dir = cmd->sc_data_direction;
 867         dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
 868                 cmd, dcb->target_id, dcb->target_lun);
 869
 870         srb->dcb = dcb;
 871         srb->cmd = cmd;
 872         srb->sg_count = 0;
 873         srb->total_xfer_length = 0;
 874         srb->sg_bus_addr = 0;
 875         srb->sg_index = 0;
 876         srb->adapter_status = 0;
 877         srb->target_status = 0;
 878         srb->msg_count = 0;
 879         srb->status = 0;
 880         srb->flag = 0;
 881         srb->state = 0;
 882         srb->retry_count = 0;
 883         srb->tag_number = TAG_NONE;
 884         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
 885         srb->end_message = 0;
 886
 887         nseg = scsi_dma_map(cmd);
 888         BUG_ON(nseg < 0);
 889
 890         if (dir == DMA_NONE || !nseg) {
 891                 dprintkdbg(DBG_0,
 892                         "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
 893                            cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
 894                            srb->segment_x[0].address);
 895         } else {
 896                 int i;
 897                 u32 reqlen = scsi_bufflen(cmd);
 898                 struct scatterlist *sg;
 899                 struct SGentry *sgp = srb->segment_x;
 900
 901                 srb->sg_count = nseg;
 902
 903                 dprintkdbg(DBG_0,
 904                            "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
 905                            reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
 906                            srb->sg_count);
 907
 908                 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
 909                         u32 busaddr = (u32)sg_dma_address(sg);
 910                         u32 seglen = (u32)sg->length;
 911                         sgp[i].address = busaddr;
 912                         sgp[i].length = seglen;
 913                         srb->total_xfer_length += seglen;
 914                 }
 915                 sgp += srb->sg_count - 1;
 916
 917                 /*
 918                  * adjust last page if too big as it is allocated
 919                  * on even page boundaries
 920                  */
 921                 if (srb->total_xfer_length > reqlen) {
 922                         sgp->length -= (srb->total_xfer_length - reqlen);
 923                         srb->total_xfer_length = reqlen;
 924                 }
 925
 926                 /* Fixup for WIDE padding - make sure length is even */
 927                 if (dcb->sync_period & WIDE_SYNC &&
 928                     srb->total_xfer_length % 2) {
 929                         srb->total_xfer_length++;
 930                         sgp->length++;
 931                 }
 932
 933                 srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev,
 934                                 srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE);
 935
 936                 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
 937                         srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
 938         }
 939
 940         srb->request_length = srb->total_xfer_length;
 941 }
 942
 943
 944 /**
 945  * dc395x_queue_command_lck - queue scsi command passed from the mid
 946  * layer, invoke 'done' on completion
 947  *
 948  * @cmd: pointer to scsi command object
 949  * @done: function pointer to be invoked on completion
 950  *
 951  * Returns 1 if the adapter (host) is busy, else returns 0. One
 952  * reason for an adapter to be busy is that the number
 953  * of outstanding queued commands is already equal to
 954  * struct Scsi_Host::can_queue .
 955  *
 956  * Required: if struct Scsi_Host::can_queue is ever non-zero
 957  *           then this function is required.
 958  *
 959  * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
 960  *        and is expected to be held on return.
 961  *
 962  **/
 963 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd)
 964 {
 965         void (*done)(struct scsi_cmnd *) = scsi_done;
 966         struct DeviceCtlBlk *dcb;
 967         struct ScsiReqBlk *srb;
 968         struct AdapterCtlBlk *acb =
 969             (struct AdapterCtlBlk *)cmd->device->host->hostdata;
 970         dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
 971                 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
 972
 973         /* Assume BAD_TARGET; will be cleared later */
 974         set_host_byte(cmd, DID_BAD_TARGET);
 975
 976         /* ignore invalid targets */
 977         if (cmd->device->id >= acb->scsi_host->max_id ||
 978             cmd->device->lun >= acb->scsi_host->max_lun ||
 979             cmd->device->lun >31) {
 980                 goto complete;
 981         }
 982
 983         /* does the specified lun on the specified device exist */
 984         if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
 985                 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
 986                         cmd->device->id, (u8)cmd->device->lun);
 987                 goto complete;
 988         }
 989
 990         /* do we have a DCB for the device */
 991         dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
 992         if (!dcb) {
 993                 /* should never happen */
 994                 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
 995                         cmd->device->id, (u8)cmd->device->lun);
 996                 goto complete;
 997         }
 998
 999         set_host_byte(cmd, DID_OK);
1000         set_status_byte(cmd, SAM_STAT_GOOD);
1001
1002         srb = list_first_entry_or_null(&acb->srb_free_list,
1003                         struct ScsiReqBlk, list);
1004         if (!srb) {
1005                 /*
1006                  * Return 1 since we are unable to queue this command at this
1007                  * point in time.
1008                  */
1009                 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1010                 return 1;
1011         }
1012         list_del(&srb->list);
1013
1014         build_srb(cmd, dcb, srb);
1015
1016         if (!list_empty(&dcb->srb_waiting_list)) {
1017                 /* append to waiting queue */
1018                 list_add_tail(&srb->list, &dcb->srb_waiting_list);
1019                 waiting_process_next(acb);
1020         } else {
1021                 /* process immediately */
1022                 send_srb(acb, srb);
1023         }
1024         dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1025         return 0;
1026
1027 complete:
1028         /*
1029          * Complete the command immediatey, and then return 0 to
1030          * indicate that we have handled the command. This is usually
1031          * done when the commad is for things like non existent
1032          * devices.
1033          */
1034         done(cmd);
1035         return 0;
1036 }
1037
1038 static DEF_SCSI_QCMD(dc395x_queue_command)
1039
1040 static void dump_register_info(struct AdapterCtlBlk *acb,
1041                 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1042 {
1043         u16 pstat;
1044         struct pci_dev *dev = acb->dev;
1045         pci_read_config_word(dev, PCI_STATUS, &pstat);
1046         if (!dcb)
1047                 dcb = acb->active_dcb;
1048         if (!srb && dcb)
1049                 srb = dcb->active_srb;
1050         if (srb) {
1051                 if (!srb->cmd)
1052                         dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1053                                 srb, srb->cmd);
1054                 else
1055                         dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1056                                  "cmnd=0x%02x <%02i-%i>\n",
1057                                 srb, srb->cmd,
1058                                 srb->cmd->cmnd[0], srb->cmd->device->id,
1059                                 (u8)srb->cmd->device->lun);
1060                 printk("  sglist=%p cnt=%i idx=%i len=%zu\n",
1061                        srb->segment_x, srb->sg_count, srb->sg_index,
1062                        srb->total_xfer_length);
1063                 printk("  state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1064                        srb->state, srb->status, srb->scsi_phase,
1065                        (acb->active_dcb) ? "" : "not");
1066         }
1067         dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1068                 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1069                 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1070                 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1071                 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1072                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1073                 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1074                 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1075                 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1076                 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1077                 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1078                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1079                 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1080                 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1081                 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1082                 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1083                 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1084         dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1085                 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1086                 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1087                 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1088                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1089                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1090                 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1091                 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1092                 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1093                 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1094                 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1095                 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1096                 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1097         dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1098                 "pci{status=0x%04x}\n",
1099                 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1100                 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1101                 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1102                 pstat);
1103 }
1104
1105
1106 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1107 {
1108 #if debug_enabled(DBG_FIFO)
1109         u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1110         u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1111         if (!(fifocnt & 0x40))
1112                 dprintkdbg(DBG_FIFO,
1113                         "clear_fifo: (%i bytes) on phase %02x in %s\n",
1114                         fifocnt & 0x3f, lines, txt);
1115 #endif
1116         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1117 }
1118
1119
1120 static void reset_dev_param(struct AdapterCtlBlk *acb)
1121 {
1122         struct DeviceCtlBlk *dcb;
1123         struct NvRamType *eeprom = &acb->eeprom;
1124         dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1125
1126         list_for_each_entry(dcb, &acb->dcb_list, list) {
1127                 u8 period_index;
1128
1129                 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1130                 dcb->sync_period = 0;
1131                 dcb->sync_offset = 0;
1132
1133                 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1134                 period_index = eeprom->target[dcb->target_id].period & 0x07;
1135                 dcb->min_nego_period = clock_period[period_index];
1136                 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1137                     || !(acb->config & HCC_WIDE_CARD))
1138                         dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1139         }
1140 }
1141
1142
1143 /*
1144  * perform a hard reset on the SCSI bus
1145  * @cmd - some command for this host (for fetching hooks)
1146  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1147  */
1148 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1149 {
1150         struct AdapterCtlBlk *acb =
1151                 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1152         dprintkl(KERN_INFO,
1153                 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1154                 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1155
1156         if (timer_pending(&acb->waiting_timer))
1157                 del_timer(&acb->waiting_timer);
1158
1159         /*
1160          * disable interrupt
1161          */
1162         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1163         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1164         DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1165         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1166
1167         reset_scsi_bus(acb);
1168         udelay(500);
1169
1170         /* We may be in serious trouble. Wait some seconds */
1171         acb->last_reset =
1172             jiffies + 3 * HZ / 2 +
1173             HZ * acb->eeprom.delay_time;
1174
1175         /*
1176          * re-enable interrupt
1177          */
1178         /* Clear SCSI FIFO          */
1179         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1180         clear_fifo(acb, "eh_bus_reset");
1181         /* Delete pending IRQ */
1182         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1183         set_basic_config(acb);
1184
1185         reset_dev_param(acb);
1186         doing_srb_done(acb, DID_RESET, cmd, 0);
1187         acb->active_dcb = NULL;
1188         acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1189         waiting_process_next(acb);
1190
1191         return SUCCESS;
1192 }
1193
1194 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1195 {
1196         int rc;
1197
1198         spin_lock_irq(cmd->device->host->host_lock);
1199         rc = __dc395x_eh_bus_reset(cmd);
1200         spin_unlock_irq(cmd->device->host->host_lock);
1201
1202         return rc;
1203 }
1204
1205 /*
1206  * abort an errant SCSI command
1207  * @cmd - command to be aborted
1208  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1209  */
1210 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1211 {
1212         /*
1213          * Look into our command queues: If it has not been sent already,
1214          * we remove it and return success. Otherwise fail.
1215          */
1216         struct AdapterCtlBlk *acb =
1217             (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1218         struct DeviceCtlBlk *dcb;
1219         struct ScsiReqBlk *srb;
1220         dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1221                 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1222
1223         dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1224         if (!dcb) {
1225                 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1226                 return FAILED;
1227         }
1228
1229         srb = find_cmd(cmd, &dcb->srb_waiting_list);
1230         if (srb) {
1231                 list_del(&srb->list);
1232                 pci_unmap_srb_sense(acb, srb);
1233                 pci_unmap_srb(acb, srb);
1234                 free_tag(dcb, srb);
1235                 list_add_tail(&srb->list, &acb->srb_free_list);
1236                 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1237                 set_host_byte(cmd, DID_ABORT);
1238                 return SUCCESS;
1239         }
1240         srb = find_cmd(cmd, &dcb->srb_going_list);
1241         if (srb) {
1242                 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1243                 /* XXX: Should abort the command here */
1244         } else {
1245                 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1246         }
1247         return FAILED;
1248 }
1249
1250
1251 /* SDTR */
1252 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1253                 struct ScsiReqBlk *srb)
1254 {
1255         u8 *ptr = srb->msgout_buf + srb->msg_count;
1256         if (srb->msg_count > 1) {
1257                 dprintkl(KERN_INFO,
1258                         "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1259                         srb->msg_count, srb->msgout_buf[0],
1260                         srb->msgout_buf[1]);
1261                 return;
1262         }
1263         if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1264                 dcb->sync_offset = 0;
1265                 dcb->min_nego_period = 200 >> 2;
1266         } else if (dcb->sync_offset == 0)
1267                 dcb->sync_offset = SYNC_NEGO_OFFSET;
1268
1269         srb->msg_count += spi_populate_sync_msg(ptr, dcb->min_nego_period,
1270                                                 dcb->sync_offset);
1271         srb->state |= SRB_DO_SYNC_NEGO;
1272 }
1273
1274
1275 /* WDTR */
1276 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1277                 struct ScsiReqBlk *srb)
1278 {
1279         u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1280                    (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1281         u8 *ptr = srb->msgout_buf + srb->msg_count;
1282         if (srb->msg_count > 1) {
1283                 dprintkl(KERN_INFO,
1284                         "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1285                         srb->msg_count, srb->msgout_buf[0],
1286                         srb->msgout_buf[1]);
1287                 return;
1288         }
1289         srb->msg_count += spi_populate_width_msg(ptr, wide);
1290         srb->state |= SRB_DO_WIDE_NEGO;
1291 }
1292
1293
1294 #if 0
1295 /* Timer to work around chip flaw: When selecting and the bus is
1296  * busy, we sometimes miss a Selection timeout IRQ */
1297 void selection_timeout_missed(unsigned long ptr);
1298 /* Sets the timer to wake us up */
1299 static void selto_timer(struct AdapterCtlBlk *acb)
1300 {
1301         if (timer_pending(&acb->selto_timer))
1302                 return;
1303         acb->selto_timer.function = selection_timeout_missed;
1304         acb->selto_timer.data = (unsigned long) acb;
1305         if (time_before
1306             (jiffies + HZ, acb->last_reset + HZ / 2))
1307                 acb->selto_timer.expires =
1308                     acb->last_reset + HZ / 2 + 1;
1309         else
1310                 acb->selto_timer.expires = jiffies + HZ + 1;
1311         add_timer(&acb->selto_timer);
1312 }
1313
1314
1315 void selection_timeout_missed(unsigned long ptr)
1316 {
1317         unsigned long flags;
1318         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1319         struct ScsiReqBlk *srb;
1320         dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1321         if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1322                 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1323                 return;
1324         }
1325         DC395x_LOCK_IO(acb->scsi_host, flags);
1326         srb = acb->active_dcb->active_srb;
1327         disconnect(acb);
1328         DC395x_UNLOCK_IO(acb->scsi_host, flags);
1329 }
1330 #endif
1331
1332
1333 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1334                 struct ScsiReqBlk* srb)
1335 {
1336         u16 __maybe_unused s_stat2, return_code;
1337         u8 s_stat, scsicommand, i, identify_message;
1338         u8 *ptr;
1339         dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1340                 dcb->target_id, dcb->target_lun, srb);
1341
1342         srb->tag_number = TAG_NONE;     /* acb->tag_max_num: had error read in eeprom */
1343
1344         s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1345         s_stat2 = 0;
1346         s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1347 #if 1
1348         if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1349                 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1350                         s_stat, s_stat2);
1351                 /*
1352                  * Try anyway?
1353                  *
1354                  * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1355                  * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1356                  * (This is likely to be a bug in the hardware. Obviously, most people
1357                  *  only have one initiator per SCSI bus.)
1358                  * Instead let this fail and have the timer make sure the command is
1359                  * tried again after a short time
1360                  */
1361                 /*selto_timer (acb); */
1362                 return 1;
1363         }
1364 #endif
1365         if (acb->active_dcb) {
1366                 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1367                         "command while another command (0x%p) is active.",
1368                         srb->cmd,
1369                         acb->active_dcb->active_srb ?
1370                             acb->active_dcb->active_srb->cmd : 0);
1371                 return 1;
1372         }
1373         if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1374                 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1375                 return 1;
1376         }
1377         /* Allow starting of SCSI commands half a second before we allow the mid-level
1378          * to queue them again after a reset */
1379         if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1380                 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1381                 return 1;
1382         }
1383
1384         /* Flush FIFO */
1385         clear_fifo(acb, "start_scsi");
1386         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1387         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1388         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1389         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1390         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1391
1392         identify_message = dcb->identify_msg;
1393         /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1394         /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1395         if (srb->flag & AUTO_REQSENSE)
1396                 identify_message &= 0xBF;
1397
1398         if (((srb->cmd->cmnd[0] == INQUIRY)
1399              || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1400              || (srb->flag & AUTO_REQSENSE))
1401             && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1402                  && !(dcb->sync_mode & WIDE_NEGO_DONE))
1403                 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1404                     && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1405             && (dcb->target_lun == 0)) {
1406                 srb->msgout_buf[0] = identify_message;
1407                 srb->msg_count = 1;
1408                 scsicommand = SCMD_SEL_ATNSTOP;
1409                 srb->state = SRB_MSGOUT;
1410 #ifndef SYNC_FIRST
1411                 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1412                     && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1413                         build_wdtr(acb, dcb, srb);
1414                         goto no_cmd;
1415                 }
1416 #endif
1417                 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1418                     && dcb->inquiry7 & SCSI_INQ_SYNC) {
1419                         build_sdtr(acb, dcb, srb);
1420                         goto no_cmd;
1421                 }
1422                 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1423                     && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1424                         build_wdtr(acb, dcb, srb);
1425                         goto no_cmd;
1426                 }
1427                 srb->msg_count = 0;
1428         }
1429         /* Send identify message */
1430         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1431
1432         scsicommand = SCMD_SEL_ATN;
1433         srb->state = SRB_START_;
1434 #ifndef DC395x_NO_TAGQ
1435         if ((dcb->sync_mode & EN_TAG_QUEUEING)
1436             && (identify_message & 0xC0)) {
1437                 /* Send Tag message */
1438                 u32 tag_mask = 1;
1439                 u8 tag_number = 0;
1440                 while (tag_mask & dcb->tag_mask
1441                        && tag_number < dcb->max_command) {
1442                         tag_mask = tag_mask << 1;
1443                         tag_number++;
1444                 }
1445                 if (tag_number >= dcb->max_command) {
1446                         dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1447                                 "Out of tags target=<%02i-%i>)\n",
1448                                 srb->cmd, srb->cmd->device->id,
1449                                 (u8)srb->cmd->device->lun);
1450                         srb->state = SRB_READY;
1451                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1452                                        DO_HWRESELECT);
1453                         return 1;
1454                 }
1455                 /* Send Tag id */
1456                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SIMPLE_QUEUE_TAG);
1457                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1458                 dcb->tag_mask |= tag_mask;
1459                 srb->tag_number = tag_number;
1460                 scsicommand = SCMD_SEL_ATN3;
1461                 srb->state = SRB_START_;
1462         }
1463 #endif
1464 /*polling:*/
1465         /* Send CDB ..command block ......... */
1466         dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1467                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1468                 srb->cmd->cmnd[0], srb->tag_number);
1469         if (srb->flag & AUTO_REQSENSE) {
1470                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1471                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1472                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1473                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1474                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1475                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1476         } else {
1477                 ptr = (u8 *)srb->cmd->cmnd;
1478                 for (i = 0; i < srb->cmd->cmd_len; i++)
1479                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1480         }
1481       no_cmd:
1482         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1483                        DO_HWRESELECT | DO_DATALATCH);
1484         if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1485                 /*
1486                  * If start_scsi return 1:
1487                  * we caught an interrupt (must be reset or reselection ... )
1488                  * : Let's process it first!
1489                  */
1490                 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1491                         srb->cmd, dcb->target_id, dcb->target_lun);
1492                 srb->state = SRB_READY;
1493                 free_tag(dcb, srb);
1494                 srb->msg_count = 0;
1495                 return_code = 1;
1496                 /* This IRQ should NOT get lost, as we did not acknowledge it */
1497         } else {
1498                 /*
1499                  * If start_scsi returns 0:
1500                  * we know that the SCSI processor is free
1501                  */
1502                 srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1503                 dcb->active_srb = srb;
1504                 acb->active_dcb = dcb;
1505                 return_code = 0;
1506                 /* it's important for atn stop */
1507                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1508                                DO_DATALATCH | DO_HWRESELECT);
1509                 /* SCSI command */
1510                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1511         }
1512         return return_code;
1513 }
1514
1515
1516 #define DC395x_ENABLE_MSGOUT \
1517  DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1518  srb->state |= SRB_MSGOUT
1519
1520
1521 /* abort command */
1522 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1523                 struct ScsiReqBlk *srb)
1524 {
1525         srb->msgout_buf[0] = ABORT;
1526         srb->msg_count = 1;
1527         DC395x_ENABLE_MSGOUT;
1528         srb->state &= ~SRB_MSGIN;
1529         srb->state |= SRB_MSGOUT;
1530 }
1531
1532
1533 /**
1534  * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1535  *                           have been triggered for this card.
1536  *
1537  * @acb:         a pointer to the adpter control block
1538  * @scsi_status: the status return when we checked the card
1539  **/
1540 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1541                 u16 scsi_status)
1542 {
1543         struct DeviceCtlBlk *dcb;
1544         struct ScsiReqBlk *srb;
1545         u16 phase;
1546         u8 scsi_intstatus;
1547         unsigned long flags;
1548         void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1549                               u16 *);
1550
1551         DC395x_LOCK_IO(acb->scsi_host, flags);
1552
1553         /* This acknowledges the IRQ */
1554         scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1555         if ((scsi_status & 0x2007) == 0x2002)
1556                 dprintkl(KERN_DEBUG,
1557                         "COP after COP completed? %04x\n", scsi_status);
1558         if (debug_enabled(DBG_KG)) {
1559                 if (scsi_intstatus & INT_SELTIMEOUT)
1560                         dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1561         }
1562         /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1563
1564         if (timer_pending(&acb->selto_timer))
1565                 del_timer(&acb->selto_timer);
1566
1567         if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1568                 disconnect(acb);        /* bus free interrupt  */
1569                 goto out_unlock;
1570         }
1571         if (scsi_intstatus & INT_RESELECTED) {
1572                 reselect(acb);
1573                 goto out_unlock;
1574         }
1575         if (scsi_intstatus & INT_SELECT) {
1576                 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1577                 goto out_unlock;
1578         }
1579         if (scsi_intstatus & INT_SCSIRESET) {
1580                 scsi_reset_detect(acb);
1581                 goto out_unlock;
1582         }
1583         if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1584                 dcb = acb->active_dcb;
1585                 if (!dcb) {
1586                         dprintkl(KERN_DEBUG,
1587                                 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1588                                 scsi_status, scsi_intstatus);
1589                         goto out_unlock;
1590                 }
1591                 srb = dcb->active_srb;
1592                 if (dcb->flag & ABORT_DEV_) {
1593                         dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1594                         enable_msgout_abort(acb, srb);
1595                 }
1596
1597                 /* software sequential machine */
1598                 phase = (u16)srb->scsi_phase;
1599
1600                 /*
1601                  * 62037 or 62137
1602                  * call  dc395x_scsi_phase0[]... "phase entry"
1603                  * handle every phase before start transfer
1604                  */
1605                 /* data_out_phase0,     phase:0 */
1606                 /* data_in_phase0,      phase:1 */
1607                 /* command_phase0,      phase:2 */
1608                 /* status_phase0,       phase:3 */
1609                 /* nop0,                phase:4 PH_BUS_FREE .. initial phase */
1610                 /* nop0,                phase:5 PH_BUS_FREE .. initial phase */
1611                 /* msgout_phase0,       phase:6 */
1612                 /* msgin_phase0,        phase:7 */
1613                 dc395x_statev = dc395x_scsi_phase0[phase];
1614                 dc395x_statev(acb, srb, &scsi_status);
1615
1616                 /*
1617                  * if there were any exception occurred scsi_status
1618                  * will be modify to bus free phase new scsi_status
1619                  * transfer out from ... previous dc395x_statev
1620                  */
1621                 srb->scsi_phase = scsi_status & PHASEMASK;
1622                 phase = (u16)scsi_status & PHASEMASK;
1623
1624                 /*
1625                  * call  dc395x_scsi_phase1[]... "phase entry" handle
1626                  * every phase to do transfer
1627                  */
1628                 /* data_out_phase1,     phase:0 */
1629                 /* data_in_phase1,      phase:1 */
1630                 /* command_phase1,      phase:2 */
1631                 /* status_phase1,       phase:3 */
1632                 /* nop1,                phase:4 PH_BUS_FREE .. initial phase */
1633                 /* nop1,                phase:5 PH_BUS_FREE .. initial phase */
1634                 /* msgout_phase1,       phase:6 */
1635                 /* msgin_phase1,        phase:7 */
1636                 dc395x_statev = dc395x_scsi_phase1[phase];
1637                 dc395x_statev(acb, srb, &scsi_status);
1638         }
1639       out_unlock:
1640         DC395x_UNLOCK_IO(acb->scsi_host, flags);
1641 }
1642
1643
1644 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1645 {
1646         struct AdapterCtlBlk *acb = dev_id;
1647         u16 scsi_status;
1648         u8 dma_status;
1649         irqreturn_t handled = IRQ_NONE;
1650
1651         /*
1652          * Check for pending interrupt
1653          */
1654         scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1655         dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1656         if (scsi_status & SCSIINTERRUPT) {
1657                 /* interrupt pending - let's process it! */
1658                 dc395x_handle_interrupt(acb, scsi_status);
1659                 handled = IRQ_HANDLED;
1660         }
1661         else if (dma_status & 0x20) {
1662                 /* Error from the DMA engine */
1663                 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1664 #if 0
1665                 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1666                 if (acb->active_dcb) {
1667                         acb->active_dcb-> flag |= ABORT_DEV_;
1668                         if (acb->active_dcb->active_srb)
1669                                 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1670                 }
1671                 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1672 #else
1673                 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1674                 acb = NULL;
1675 #endif
1676                 handled = IRQ_HANDLED;
1677         }
1678
1679         return handled;
1680 }
1681
1682
1683 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1684                 u16 *pscsi_status)
1685 {
1686         dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1687         if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1688                 *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
1689
1690         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
1691         srb->state &= ~SRB_MSGOUT;
1692 }
1693
1694
1695 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1696                 u16 *pscsi_status)
1697 {
1698         u16 i;
1699         u8 *ptr;
1700         dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1701
1702         clear_fifo(acb, "msgout_phase1");
1703         if (!(srb->state & SRB_MSGOUT)) {
1704                 srb->state |= SRB_MSGOUT;
1705                 dprintkl(KERN_DEBUG,
1706                         "msgout_phase1: (0x%p) Phase unexpected\n",
1707                         srb->cmd);      /* So what ? */
1708         }
1709         if (!srb->msg_count) {
1710                 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1711                         srb->cmd);
1712                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, NOP);
1713                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1714                 /* it's important for atn stop */
1715                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1716                 return;
1717         }
1718         ptr = (u8 *)srb->msgout_buf;
1719         for (i = 0; i < srb->msg_count; i++)
1720                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1721         srb->msg_count = 0;
1722         if (srb->msgout_buf[0] == ABORT_TASK_SET)
1723                 srb->state = SRB_ABORT_SENT;
1724
1725         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1726 }
1727
1728
1729 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1730                 u16 *pscsi_status)
1731 {
1732         dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1733         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1734 }
1735
1736
1737 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1738                 u16 *pscsi_status)
1739 {
1740         struct DeviceCtlBlk *dcb;
1741         u8 *ptr;
1742         u16 i;
1743         dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1744
1745         clear_fifo(acb, "command_phase1");
1746         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1747         if (!(srb->flag & AUTO_REQSENSE)) {
1748                 ptr = (u8 *)srb->cmd->cmnd;
1749                 for (i = 0; i < srb->cmd->cmd_len; i++) {
1750                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1751                         ptr++;
1752                 }
1753         } else {
1754                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1755                 dcb = acb->active_dcb;
1756                 /* target id */
1757                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1758                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1759                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1760                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1761                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1762         }
1763         srb->state |= SRB_COMMAND;
1764         /* it's important for atn stop */
1765         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1766         /* SCSI command */
1767         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1768 }
1769
1770
1771 /*
1772  * Verify that the remaining space in the hw sg lists is the same as
1773  * the count of remaining bytes in srb->total_xfer_length
1774  */
1775 static void sg_verify_length(struct ScsiReqBlk *srb)
1776 {
1777         if (debug_enabled(DBG_SG)) {
1778                 unsigned len = 0;
1779                 unsigned idx = srb->sg_index;
1780                 struct SGentry *psge = srb->segment_x + idx;
1781                 for (; idx < srb->sg_count; psge++, idx++)
1782                         len += psge->length;
1783                 if (len != srb->total_xfer_length)
1784                         dprintkdbg(DBG_SG,
1785                                "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1786                                srb->total_xfer_length, len);
1787         }
1788 }
1789
1790
1791 /*
1792  * Compute the next Scatter Gather list index and adjust its length
1793  * and address if necessary
1794  */
1795 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1796 {
1797         u8 idx;
1798         u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1799         struct SGentry *psge = srb->segment_x + srb->sg_index;
1800
1801         dprintkdbg(DBG_0,
1802                 "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1803                 xferred, srb->total_xfer_length, left);
1804         if (xferred == 0) {
1805                 /* nothing to update since we did not transfer any data */
1806                 return;
1807         }
1808
1809         sg_verify_length(srb);
1810         srb->total_xfer_length = left;  /* update remaining count */
1811         for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1812                 if (xferred >= psge->length) {
1813                         /* Complete SG entries done */
1814                         xferred -= psge->length;
1815                 } else {
1816                         /* Partial SG entry done */
1817                         dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev,
1818                                         srb->sg_bus_addr, SEGMENTX_LEN,
1819                                         DMA_TO_DEVICE);
1820                         psge->length -= xferred;
1821                         psge->address += xferred;
1822                         srb->sg_index = idx;
1823                         dma_sync_single_for_device(&srb->dcb->acb->dev->dev,
1824                                         srb->sg_bus_addr, SEGMENTX_LEN,
1825                                         DMA_TO_DEVICE);
1826                         break;
1827                 }
1828                 psge++;
1829         }
1830         sg_verify_length(srb);
1831 }
1832
1833
1834 /*
1835  * We have transferred a single byte (PIO mode?) and need to update
1836  * the count of bytes remaining (total_xfer_length) and update the sg
1837  * entry to either point to next byte in the current sg entry, or of
1838  * already at the end to point to the start of the next sg entry
1839  */
1840 static void sg_subtract_one(struct ScsiReqBlk *srb)
1841 {
1842         sg_update_list(srb, srb->total_xfer_length - 1);
1843 }
1844
1845
1846 /*
1847  * cleanup_after_transfer
1848  *
1849  * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
1850  * KG: Currently called from  StatusPhase1 ()
1851  * Should probably also be called from other places
1852  * Best might be to call it in DataXXPhase0, if new phase will differ
1853  */
1854 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
1855                 struct ScsiReqBlk *srb)
1856 {
1857         /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
1858         if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {       /* read */
1859                 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1860                         clear_fifo(acb, "cleanup/in");
1861                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1862                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1863         } else {                /* write */
1864                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1865                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1866                 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1867                         clear_fifo(acb, "cleanup/out");
1868         }
1869         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1870 }
1871
1872
1873 /*
1874  * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
1875  * Seems to be needed for unknown reasons; could be a hardware bug :-(
1876  */
1877 #define DC395x_LASTPIO 4
1878
1879
1880 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1881                 u16 *pscsi_status)
1882 {
1883         struct DeviceCtlBlk *dcb = srb->dcb;
1884         u16 scsi_status = *pscsi_status;
1885         u32 d_left_counter = 0;
1886         dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
1887                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1888
1889         /*
1890          * KG: We need to drain the buffers before we draw any conclusions!
1891          * This means telling the DMA to push the rest into SCSI, telling
1892          * SCSI to push the rest to the bus.
1893          * However, the device might have been the one to stop us (phase
1894          * change), and the data in transit just needs to be accounted so
1895          * it can be retransmitted.)
1896          */
1897         /*
1898          * KG: Stop DMA engine pushing more data into the SCSI FIFO
1899          * If we need more data, the DMA SG list will be freshly set up, anyway
1900          */
1901         dprintkdbg(DBG_PIO, "data_out_phase0: "
1902                 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
1903                 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
1904                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1905                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1906                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1907                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
1908                 srb->total_xfer_length);
1909         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
1910
1911         if (!(srb->state & SRB_XFERPAD)) {
1912                 if (scsi_status & PARITYERROR)
1913                         srb->status |= PARITY_ERROR;
1914
1915                 /*
1916                  * KG: Right, we can't just rely on the SCSI_COUNTER, because this
1917                  * is the no of bytes it got from the DMA engine not the no it
1918                  * transferred successfully to the device. (And the difference could
1919                  * be as much as the FIFO size, I guess ...)
1920                  */
1921                 if (!(scsi_status & SCSIXFERDONE)) {
1922                         /*
1923                          * when data transfer from DMA FIFO to SCSI FIFO
1924                          * if there was some data left in SCSI FIFO
1925                          */
1926                         d_left_counter =
1927                             (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
1928                                   0x1F);
1929                         if (dcb->sync_period & WIDE_SYNC)
1930                                 d_left_counter <<= 1;
1931
1932                         dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
1933                                 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
1934                                 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
1935                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1936                                 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
1937                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1938                                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1939                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1940                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1941                                 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
1942                 }
1943                 /*
1944                  * calculate all the residue data that not yet tranfered
1945                  * SCSI transfer counter + left in SCSI FIFO data
1946                  *
1947                  * .....TRM_S1040_SCSI_COUNTER (24bits)
1948                  * The counter always decrement by one for every SCSI byte transfer.
1949                  * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
1950                  * The counter is SCSI FIFO offset counter (in units of bytes or! words)
1951                  */
1952                 if (srb->total_xfer_length > DC395x_LASTPIO)
1953                         d_left_counter +=
1954                             DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
1955
1956                 /* Is this a good idea? */
1957                 /*clear_fifo(acb, "DOP1"); */
1958                 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
1959                 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
1960                     && scsi_bufflen(srb->cmd) % 2) {
1961                         d_left_counter = 0;
1962                         dprintkl(KERN_INFO,
1963                                 "data_out_phase0: Discard 1 byte (0x%02x)\n",
1964                                 scsi_status);
1965                 }
1966                 /*
1967                  * KG: Oops again. Same thinko as above: The SCSI might have been
1968                  * faster than the DMA engine, so that it ran out of data.
1969                  * In that case, we have to do just nothing!
1970                  * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
1971                  */
1972                 /*
1973                  * KG: This is nonsense: We have been WRITING data to the bus
1974                  * If the SCSI engine has no bytes left, how should the DMA engine?
1975                  */
1976                 if (d_left_counter == 0) {
1977                         srb->total_xfer_length = 0;
1978                 } else {
1979                         /*
1980                          * if transfer not yet complete
1981                          * there were some data residue in SCSI FIFO or
1982                          * SCSI transfer counter not empty
1983                          */
1984                         long oldxferred =
1985                             srb->total_xfer_length - d_left_counter;
1986                         const int diff =
1987                             (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
1988                         sg_update_list(srb, d_left_counter);
1989                         /* KG: Most ugly hack! Apparently, this works around a chip bug */
1990                         if ((srb->segment_x[srb->sg_index].length ==
1991                              diff && scsi_sg_count(srb->cmd))
1992                             || ((oldxferred & ~PAGE_MASK) ==
1993                                 (PAGE_SIZE - diff))
1994                             ) {
1995                                 dprintkl(KERN_INFO, "data_out_phase0: "
1996                                         "Work around chip bug (%i)?\n", diff);
1997                                 d_left_counter =
1998                                     srb->total_xfer_length - diff;
1999                                 sg_update_list(srb, d_left_counter);
2000                                 /*srb->total_xfer_length -= diff; */
2001                                 /*srb->virt_addr += diff; */
2002                                 /*if (srb->cmd->use_sg) */
2003                                 /*      srb->sg_index++; */
2004                         }
2005                 }
2006         }
2007         if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2008                 cleanup_after_transfer(acb, srb);
2009         }
2010 }
2011
2012
2013 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2014                 u16 *pscsi_status)
2015 {
2016         dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2017                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2018         clear_fifo(acb, "data_out_phase1");
2019         /* do prepare before transfer when data out phase */
2020         data_io_transfer(acb, srb, XFERDATAOUT);
2021 }
2022
2023 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2024                 u16 *pscsi_status)
2025 {
2026         u16 scsi_status = *pscsi_status;
2027
2028         dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2029                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2030
2031         /*
2032          * KG: DataIn is much more tricky than DataOut. When the device is finished
2033          * and switches to another phase, the SCSI engine should be finished too.
2034          * But: There might still be bytes left in its FIFO to be fetched by the DMA
2035          * engine and transferred to memory.
2036          * We should wait for the FIFOs to be emptied by that (is there any way to
2037          * enforce this?) and then stop the DMA engine, because it might think, that
2038          * there are more bytes to follow. Yes, the device might disconnect prior to
2039          * having all bytes transferred!
2040          * Also we should make sure that all data from the DMA engine buffer's really
2041          * made its way to the system memory! Some documentation on this would not
2042          * seem to be a bad idea, actually.
2043          */
2044         if (!(srb->state & SRB_XFERPAD)) {
2045                 u32 d_left_counter;
2046                 unsigned int sc, fc;
2047
2048                 if (scsi_status & PARITYERROR) {
2049                         dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2050                                 "Parity Error\n", srb->cmd);
2051                         srb->status |= PARITY_ERROR;
2052                 }
2053                 /*
2054                  * KG: We should wait for the DMA FIFO to be empty ...
2055                  * but: it would be better to wait first for the SCSI FIFO and then the
2056                  * the DMA FIFO to become empty? How do we know, that the device not already
2057                  * sent data to the FIFO in a MsgIn phase, eg.?
2058                  */
2059                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2060 #if 0
2061                         int ctr = 6000000;
2062                         dprintkl(KERN_DEBUG,
2063                                 "DIP0: Wait for DMA FIFO to flush ...\n");
2064                         /*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2065                         /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2066                         /*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2067                         while (!
2068                                (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2069                                 0x80) && --ctr);
2070                         if (ctr < 6000000 - 1)
2071                                 dprintkl(KERN_DEBUG
2072                                        "DIP0: Had to wait for DMA ...\n");
2073                         if (!ctr)
2074                                 dprintkl(KERN_ERR,
2075                                        "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2076                         /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2077 #endif
2078                         dprintkdbg(DBG_KG, "data_in_phase0: "
2079                                 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2080                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2081                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2082                 }
2083                 /* Now: Check remainig data: The SCSI counters should tell us ... */
2084                 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2085                 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2086                 d_left_counter = sc + ((fc & 0x1f)
2087                        << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2088                            0));
2089                 dprintkdbg(DBG_KG, "data_in_phase0: "
2090                         "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2091                         "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2092                         "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2093                         fc,
2094                         (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2095                         sc,
2096                         fc,
2097                         DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2098                         DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2099                         srb->total_xfer_length, d_left_counter);
2100 #if DC395x_LASTPIO
2101                 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2102                 if (d_left_counter
2103                     && srb->total_xfer_length <= DC395x_LASTPIO) {
2104                         size_t left_io = srb->total_xfer_length;
2105
2106                         /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2107                         /*sg_update_list (srb, d_left_counter); */
2108                         dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2109                                    "for remaining %i bytes:",
2110                                 fc & 0x1f,
2111                                 (srb->dcb->sync_period & WIDE_SYNC) ?
2112                                     "words" : "bytes",
2113                                 srb->total_xfer_length);
2114                         if (srb->dcb->sync_period & WIDE_SYNC)
2115                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2116                                               CFG2_WIDEFIFO);
2117                         while (left_io) {
2118                                 unsigned char *virt, *base = NULL;
2119                                 unsigned long flags = 0;
2120                                 size_t len = left_io;
2121                                 size_t offset = srb->request_length - left_io;
2122
2123                                 local_irq_save(flags);
2124                                 /* Assumption: it's inside one page as it's at most 4 bytes and
2125                                    I just assume it's on a 4-byte boundary */
2126                                 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2127                                                            srb->sg_count, &offset, &len);
2128                                 virt = base + offset;
2129
2130                                 left_io -= len;
2131
2132                                 while (len) {
2133                                         u8 byte;
2134                                         byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2135                                         *virt++ = byte;
2136
2137                                         if (debug_enabled(DBG_PIO))
2138                                                 printk(" %02x", byte);
2139
2140                                         d_left_counter--;
2141                                         sg_subtract_one(srb);
2142
2143                                         len--;
2144
2145                                         fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2146
2147                                         if (fc == 0x40) {
2148                                                 left_io = 0;
2149                                                 break;
2150                                         }
2151                                 }
2152
2153                                 WARN_ON((fc != 0x40) == !d_left_counter);
2154
2155                                 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2156                                         /* Read the last byte ... */
2157                                         if (srb->total_xfer_length > 0) {
2158                                                 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2159
2160                                                 *virt++ = byte;
2161                                                 srb->total_xfer_length--;
2162                                                 if (debug_enabled(DBG_PIO))
2163                                                         printk(" %02x", byte);
2164                                         }
2165
2166                                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2167                                 }
2168
2169                                 scsi_kunmap_atomic_sg(base);
2170                                 local_irq_restore(flags);
2171                         }
2172                         /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2173                         /*srb->total_xfer_length = 0; */
2174                         if (debug_enabled(DBG_PIO))
2175                                 printk("\n");
2176                 }
2177 #endif                          /* DC395x_LASTPIO */
2178
2179 #if 0
2180                 /*
2181                  * KG: This was in DATAOUT. Does it also belong here?
2182                  * Nobody seems to know what counter and fifo_cnt count exactly ...
2183                  */
2184                 if (!(scsi_status & SCSIXFERDONE)) {
2185                         /*
2186                          * when data transfer from DMA FIFO to SCSI FIFO
2187                          * if there was some data left in SCSI FIFO
2188                          */
2189                         d_left_counter =
2190                             (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2191                                   0x1F);
2192                         if (srb->dcb->sync_period & WIDE_SYNC)
2193                                 d_left_counter <<= 1;
2194                         /*
2195                          * if WIDE scsi SCSI FIFOCNT unit is word !!!
2196                          * so need to *= 2
2197                          * KG: Seems to be correct ...
2198                          */
2199                 }
2200 #endif
2201                 /* KG: This should not be needed any more! */
2202                 if (d_left_counter == 0
2203                     || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2204 #if 0
2205                         int ctr = 6000000;
2206                         u8 TempDMAstatus;
2207                         do {
2208                                 TempDMAstatus =
2209                                     DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2210                         } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2211                         if (!ctr)
2212                                 dprintkl(KERN_ERR,
2213                                        "Deadlock in DataInPhase0 waiting for DMA!!\n");
2214                         srb->total_xfer_length = 0;
2215 #endif
2216                         srb->total_xfer_length = d_left_counter;
2217                 } else {        /* phase changed */
2218                         /*
2219                          * parsing the case:
2220                          * when a transfer not yet complete
2221                          * but be disconnected by target
2222                          * if transfer not yet complete
2223                          * there were some data residue in SCSI FIFO or
2224                          * SCSI transfer counter not empty
2225                          */
2226                         sg_update_list(srb, d_left_counter);
2227                 }
2228         }
2229         /* KG: The target may decide to disconnect: Empty FIFO before! */
2230         if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2231                 cleanup_after_transfer(acb, srb);
2232         }
2233 }
2234
2235
2236 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2237                 u16 *pscsi_status)
2238 {
2239         dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2240                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2241         data_io_transfer(acb, srb, XFERDATAIN);
2242 }
2243
2244
2245 static void data_io_transfer(struct AdapterCtlBlk *acb,
2246                 struct ScsiReqBlk *srb, u16 io_dir)
2247 {
2248         struct DeviceCtlBlk *dcb = srb->dcb;
2249         u8 bval;
2250         dprintkdbg(DBG_0,
2251                 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2252                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2253                 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2254                 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2255         if (srb == acb->tmp_srb)
2256                 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2257         if (srb->sg_index >= srb->sg_count) {
2258                 /* can't happen? out of bounds error */
2259                 return;
2260         }
2261
2262         if (srb->total_xfer_length > DC395x_LASTPIO) {
2263                 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2264                 /*
2265                  * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2266                  * Maybe, even ABORTXFER would be appropriate
2267                  */
2268                 if (dma_status & XFERPENDING) {
2269                         dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2270                                 "Expect trouble!\n");
2271                         dump_register_info(acb, dcb, srb);
2272                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2273                 }
2274                 /* clear_fifo(acb, "IO"); */
2275                 /*
2276                  * load what physical address of Scatter/Gather list table
2277                  * want to be transfer
2278                  */
2279                 srb->state |= SRB_DATA_XFER;
2280                 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2281                 if (scsi_sg_count(srb->cmd)) {  /* with S/G */
2282                         io_dir |= DMACMD_SG;
2283                         DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2284                                        srb->sg_bus_addr +
2285                                        sizeof(struct SGentry) *
2286                                        srb->sg_index);
2287                         /* load how many bytes in the sg list table */
2288                         DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2289                                        ((u32)(srb->sg_count -
2290                                               srb->sg_index) << 3));
2291                 } else {        /* without S/G */
2292                         io_dir &= ~DMACMD_SG;
2293                         DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2294                                        srb->segment_x[0].address);
2295                         DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2296                                        srb->segment_x[0].length);
2297                 }
2298                 /* load total transfer length (24bits) max value 16Mbyte */
2299                 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2300                                srb->total_xfer_length);
2301                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2302                 if (io_dir & DMACMD_DIR) {      /* read */
2303                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2304                                       SCMD_DMA_IN);
2305                         DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2306                 } else {
2307                         DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2308                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2309                                       SCMD_DMA_OUT);
2310                 }
2311
2312         }
2313 #if DC395x_LASTPIO
2314         else if (srb->total_xfer_length > 0) {  /* The last four bytes: Do PIO */
2315                 /*
2316                  * load what physical address of Scatter/Gather list table
2317                  * want to be transfer
2318                  */
2319                 srb->state |= SRB_DATA_XFER;
2320                 /* load total transfer length (24bits) max value 16Mbyte */
2321                 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2322                                srb->total_xfer_length);
2323                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2324                 if (io_dir & DMACMD_DIR) {      /* read */
2325                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2326                                       SCMD_FIFO_IN);
2327                 } else {        /* write */
2328                         int ln = srb->total_xfer_length;
2329                         size_t left_io = srb->total_xfer_length;
2330
2331                         if (srb->dcb->sync_period & WIDE_SYNC)
2332                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2333                                      CFG2_WIDEFIFO);
2334
2335                         while (left_io) {
2336                                 unsigned char *virt, *base = NULL;
2337                                 unsigned long flags = 0;
2338                                 size_t len = left_io;
2339                                 size_t offset = srb->request_length - left_io;
2340
2341                                 local_irq_save(flags);
2342                                 /* Again, max 4 bytes */
2343                                 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2344                                                            srb->sg_count, &offset, &len);
2345                                 virt = base + offset;
2346
2347                                 left_io -= len;
2348
2349                                 while (len--) {
2350                                         if (debug_enabled(DBG_PIO))
2351                                                 printk(" %02x", *virt);
2352
2353                                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2354
2355                                         sg_subtract_one(srb);
2356                                 }
2357
2358                                 scsi_kunmap_atomic_sg(base);
2359                                 local_irq_restore(flags);
2360                         }
2361                         if (srb->dcb->sync_period & WIDE_SYNC) {
2362                                 if (ln % 2) {
2363                                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2364                                         if (debug_enabled(DBG_PIO))
2365                                                 printk(" |00");
2366                                 }
2367                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2368                         }
2369                         /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2370                         if (debug_enabled(DBG_PIO))
2371                                 printk("\n");
2372                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2373                                           SCMD_FIFO_OUT);
2374                 }
2375         }
2376 #endif                          /* DC395x_LASTPIO */
2377         else {          /* xfer pad */
2378                 if (srb->sg_count) {
2379                         srb->adapter_status = H_OVER_UNDER_RUN;
2380                         srb->status |= OVER_RUN;
2381                 }
2382                 /*
2383                  * KG: despite the fact that we are using 16 bits I/O ops
2384                  * the SCSI FIFO is only 8 bits according to the docs
2385                  * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2386                  */
2387                 if (dcb->sync_period & WIDE_SYNC) {
2388                         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2389                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2390                                       CFG2_WIDEFIFO);
2391                         if (io_dir & DMACMD_DIR) {
2392                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2393                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2394                         } else {
2395                                 /* Danger, Robinson: If you find KGs
2396                                  * scattered over the wide disk, the driver
2397                                  * or chip is to blame :-( */
2398                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2399                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2400                         }
2401                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2402                 } else {
2403                         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2404                         /* Danger, Robinson: If you find a collection of Ks on your disk
2405                          * something broke :-( */
2406                         if (io_dir & DMACMD_DIR)
2407                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2408                         else
2409                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2410                 }
2411                 srb->state |= SRB_XFERPAD;
2412                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2413                 /* SCSI command */
2414                 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2415                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2416         }
2417 }
2418
2419
2420 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2421                 u16 *pscsi_status)
2422 {
2423         dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2424                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2425         srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2426         srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);      /* get message */
2427         srb->state = SRB_COMPLETED;
2428         *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
2429         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2430         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2431 }
2432
2433
2434 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2435                 u16 *pscsi_status)
2436 {
2437         dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2438                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2439         srb->state = SRB_STATUS;
2440         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2441         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2442 }
2443
2444
2445 /* Check if the message is complete */
2446 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2447 {
2448         if (*msgbuf == EXTENDED_MESSAGE) {
2449                 if (len < 2)
2450                         return 0;
2451                 if (len < msgbuf[1] + 2)
2452                         return 0;
2453         } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)  /* two byte messages */
2454                 if (len < 2)
2455                         return 0;
2456         return 1;
2457 }
2458
2459 /* reject_msg */
2460 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2461                 struct ScsiReqBlk *srb)
2462 {
2463         srb->msgout_buf[0] = MESSAGE_REJECT;
2464         srb->msg_count = 1;
2465         DC395x_ENABLE_MSGOUT;
2466         srb->state &= ~SRB_MSGIN;
2467         srb->state |= SRB_MSGOUT;
2468         dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2469                 srb->msgin_buf[0],
2470                 srb->dcb->target_id, srb->dcb->target_lun);
2471 }
2472
2473
2474 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2475                 struct DeviceCtlBlk *dcb, u8 tag)
2476 {
2477         struct ScsiReqBlk *srb = NULL;
2478         struct ScsiReqBlk *i;
2479         dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2480                    srb->cmd, tag, srb);
2481
2482         if (!(dcb->tag_mask & (1 << tag)))
2483                 dprintkl(KERN_DEBUG,
2484                         "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2485                         dcb->tag_mask, tag);
2486
2487         if (list_empty(&dcb->srb_going_list))
2488                 goto mingx0;
2489         list_for_each_entry(i, &dcb->srb_going_list, list) {
2490                 if (i->tag_number == tag) {
2491                         srb = i;
2492                         break;
2493                 }
2494         }
2495         if (!srb)
2496                 goto mingx0;
2497
2498         dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2499                 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2500         if (dcb->flag & ABORT_DEV_) {
2501                 /*srb->state = SRB_ABORT_SENT; */
2502                 enable_msgout_abort(acb, srb);
2503         }
2504
2505         if (!(srb->state & SRB_DISCONNECT))
2506                 goto mingx0;
2507
2508         memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2509         srb->state |= dcb->active_srb->state;
2510         srb->state |= SRB_DATA_XFER;
2511         dcb->active_srb = srb;
2512         /* How can we make the DORS happy? */
2513         return srb;
2514
2515       mingx0:
2516         srb = acb->tmp_srb;
2517         srb->state = SRB_UNEXPECT_RESEL;
2518         dcb->active_srb = srb;
2519         srb->msgout_buf[0] = ABORT_TASK;
2520         srb->msg_count = 1;
2521         DC395x_ENABLE_MSGOUT;
2522         dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2523         return srb;
2524 }
2525
2526
2527 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2528                 struct DeviceCtlBlk *dcb)
2529 {
2530         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2531         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2532         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2533         set_xfer_rate(acb, dcb);
2534 }
2535
2536
2537 /* set async transfer mode */
2538 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2539 {
2540         struct DeviceCtlBlk *dcb = srb->dcb;
2541         dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2542                 dcb->target_id, dcb->target_lun);
2543
2544         dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2545         dcb->sync_mode |= SYNC_NEGO_DONE;
2546         /*dcb->sync_period &= 0; */
2547         dcb->sync_offset = 0;
2548         dcb->min_nego_period = 200 >> 2;        /* 200ns <=> 5 MHz */
2549         srb->state &= ~SRB_DO_SYNC_NEGO;
2550         reprogram_regs(acb, dcb);
2551         if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2552             && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2553                 build_wdtr(acb, dcb, srb);
2554                 DC395x_ENABLE_MSGOUT;
2555                 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2556         }
2557 }
2558
2559
2560 /* set sync transfer mode */
2561 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2562 {
2563         struct DeviceCtlBlk *dcb = srb->dcb;
2564         u8 bval;
2565         int fact;
2566         dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2567                 "(%02i.%01i MHz) Offset %i\n",
2568                 dcb->target_id, srb->msgin_buf[3] << 2,
2569                 (250 / srb->msgin_buf[3]),
2570                 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2571                 srb->msgin_buf[4]);
2572
2573         if (srb->msgin_buf[4] > 15)
2574                 srb->msgin_buf[4] = 15;
2575         if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2576                 dcb->sync_offset = 0;
2577         else if (dcb->sync_offset == 0)
2578                 dcb->sync_offset = srb->msgin_buf[4];
2579         if (srb->msgin_buf[4] > dcb->sync_offset)
2580                 srb->msgin_buf[4] = dcb->sync_offset;
2581         else
2582                 dcb->sync_offset = srb->msgin_buf[4];
2583         bval = 0;
2584         while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2585                             || dcb->min_nego_period >
2586                             clock_period[bval]))
2587                 bval++;
2588         if (srb->msgin_buf[3] < clock_period[bval])
2589                 dprintkl(KERN_INFO,
2590                         "msgin_set_sync: Increase sync nego period to %ins\n",
2591                         clock_period[bval] << 2);
2592         srb->msgin_buf[3] = clock_period[bval];
2593         dcb->sync_period &= 0xf0;
2594         dcb->sync_period |= ALT_SYNC | bval;
2595         dcb->min_nego_period = srb->msgin_buf[3];
2596
2597         if (dcb->sync_period & WIDE_SYNC)
2598                 fact = 500;
2599         else
2600                 fact = 250;
2601
2602         dprintkl(KERN_INFO,
2603                 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2604                 dcb->target_id, (fact == 500) ? "Wide16" : "",
2605                 dcb->min_nego_period << 2, dcb->sync_offset,
2606                 (fact / dcb->min_nego_period),
2607                 ((fact % dcb->min_nego_period) * 10 +
2608                 dcb->min_nego_period / 2) / dcb->min_nego_period);
2609
2610         if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2611                 /* Reply with corrected SDTR Message */
2612                 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2613                         srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2614
2615                 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2616                 srb->msg_count = 5;
2617                 DC395x_ENABLE_MSGOUT;
2618                 dcb->sync_mode |= SYNC_NEGO_DONE;
2619         } else {
2620                 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2621                     && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2622                         build_wdtr(acb, dcb, srb);
2623                         DC395x_ENABLE_MSGOUT;
2624                         dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2625                 }
2626         }
2627         srb->state &= ~SRB_DO_SYNC_NEGO;
2628         dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2629
2630         reprogram_regs(acb, dcb);
2631 }
2632
2633
2634 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2635                 struct ScsiReqBlk *srb)
2636 {
2637         struct DeviceCtlBlk *dcb = srb->dcb;
2638         dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2639
2640         dcb->sync_period &= ~WIDE_SYNC;
2641         dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2642         dcb->sync_mode |= WIDE_NEGO_DONE;
2643         srb->state &= ~SRB_DO_WIDE_NEGO;
2644         reprogram_regs(acb, dcb);
2645         if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2646             && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2647                 build_sdtr(acb, dcb, srb);
2648                 DC395x_ENABLE_MSGOUT;
2649                 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2650         }
2651 }
2652
2653 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2654 {
2655         struct DeviceCtlBlk *dcb = srb->dcb;
2656         u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2657                    && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2658         dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2659
2660         if (srb->msgin_buf[3] > wide)
2661                 srb->msgin_buf[3] = wide;
2662         /* Completed */
2663         if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2664                 dprintkl(KERN_DEBUG,
2665                         "msgin_set_wide: Wide nego initiated <%02i>\n",
2666                         dcb->target_id);
2667                 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2668                 srb->msg_count = 4;
2669                 srb->state |= SRB_DO_WIDE_NEGO;
2670                 DC395x_ENABLE_MSGOUT;
2671         }
2672
2673         dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2674         if (srb->msgin_buf[3] > 0)
2675                 dcb->sync_period |= WIDE_SYNC;
2676         else
2677                 dcb->sync_period &= ~WIDE_SYNC;
2678         srb->state &= ~SRB_DO_WIDE_NEGO;
2679         /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2680         dprintkdbg(DBG_1,
2681                 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2682                 (8 << srb->msgin_buf[3]), dcb->target_id);
2683         reprogram_regs(acb, dcb);
2684         if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2685             && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2686                 build_sdtr(acb, dcb, srb);
2687                 DC395x_ENABLE_MSGOUT;
2688                 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2689         }
2690 }
2691
2692
2693 /*
2694  * extended message codes:
2695  *
2696  *      code    description
2697  *
2698  *      02h     Reserved
2699  *      00h     MODIFY DATA  POINTER
2700  *      01h     SYNCHRONOUS DATA TRANSFER REQUEST
2701  *      03h     WIDE DATA TRANSFER REQUEST
2702  *   04h - 7Fh  Reserved
2703  *   80h - FFh  Vendor specific
2704  */
2705 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2706                 u16 *pscsi_status)
2707 {
2708         struct DeviceCtlBlk *dcb = acb->active_dcb;
2709         dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2710
2711         srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2712         if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2713                 /* Now eval the msg */
2714                 switch (srb->msgin_buf[0]) {
2715                 case DISCONNECT:
2716                         srb->state = SRB_DISCONNECT;
2717                         break;
2718
2719                 case SIMPLE_QUEUE_TAG:
2720                 case HEAD_OF_QUEUE_TAG:
2721                 case ORDERED_QUEUE_TAG:
2722                         srb =
2723                             msgin_qtag(acb, dcb,
2724                                               srb->msgin_buf[1]);
2725                         break;
2726
2727                 case MESSAGE_REJECT:
2728                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2729                                        DO_CLRATN | DO_DATALATCH);
2730                         /* A sync nego message was rejected ! */
2731                         if (srb->state & SRB_DO_SYNC_NEGO) {
2732                                 msgin_set_async(acb, srb);
2733                                 break;
2734                         }
2735                         /* A wide nego message was rejected ! */
2736                         if (srb->state & SRB_DO_WIDE_NEGO) {
2737                                 msgin_set_nowide(acb, srb);
2738                                 break;
2739                         }
2740                         enable_msgout_abort(acb, srb);
2741                         /*srb->state |= SRB_ABORT_SENT */
2742                         break;
2743
2744                 case EXTENDED_MESSAGE:
2745                         /* SDTR */
2746                         if (srb->msgin_buf[1] == 3
2747                             && srb->msgin_buf[2] == EXTENDED_SDTR) {
2748                                 msgin_set_sync(acb, srb);
2749                                 break;
2750                         }
2751                         /* WDTR */
2752                         if (srb->msgin_buf[1] == 2
2753                             && srb->msgin_buf[2] == EXTENDED_WDTR
2754                             && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2755                                 msgin_set_wide(acb, srb);
2756                                 break;
2757                         }
2758                         msgin_reject(acb, srb);
2759                         break;
2760
2761                 case IGNORE_WIDE_RESIDUE:
2762                         /* Discard  wide residual */
2763                         dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2764                         break;
2765
2766                 case COMMAND_COMPLETE:
2767                         /* nothing has to be done */
2768                         break;
2769
2770                 case SAVE_POINTERS:
2771                         /*
2772                          * SAVE POINTER may be ignored as we have the struct
2773                          * ScsiReqBlk* associated with the scsi command.
2774                          */
2775                         dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2776                                 "SAVE POINTER rem=%i Ignore\n",
2777                                 srb->cmd, srb->total_xfer_length);
2778                         break;
2779
2780                 case RESTORE_POINTERS:
2781                         dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2782                         break;
2783
2784                 case ABORT:
2785                         dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2786                                 "<%02i-%i> ABORT msg\n",
2787                                 srb->cmd, dcb->target_id,
2788                                 dcb->target_lun);
2789                         dcb->flag |= ABORT_DEV_;
2790                         enable_msgout_abort(acb, srb);
2791                         break;
2792
2793                 default:
2794                         /* reject unknown messages */
2795                         if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2796                                 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2797                                 srb->msg_count = 1;
2798                                 srb->msgout_buf[0] = dcb->identify_msg;
2799                                 DC395x_ENABLE_MSGOUT;
2800                                 srb->state |= SRB_MSGOUT;
2801                                 /*break; */
2802                         }
2803                         msgin_reject(acb, srb);
2804                 }
2805
2806                 /* Clear counter and MsgIn state */
2807                 srb->state &= ~SRB_MSGIN;
2808                 acb->msg_len = 0;
2809         }
2810         *pscsi_status = PH_BUS_FREE;
2811         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important ... you know! */
2812         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2813 }
2814
2815
2816 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2817                 u16 *pscsi_status)
2818 {
2819         dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2820         clear_fifo(acb, "msgin_phase1");
2821         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2822         if (!(srb->state & SRB_MSGIN)) {
2823                 srb->state &= ~SRB_DISCONNECT;
2824                 srb->state |= SRB_MSGIN;
2825         }
2826         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2827         /* SCSI command */
2828         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2829 }
2830
2831
2832 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2833                 u16 *pscsi_status)
2834 {
2835 }
2836
2837
2838 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2839                 u16 *pscsi_status)
2840 {
2841 }
2842
2843
2844 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
2845 {
2846         struct DeviceCtlBlk *i;
2847
2848         /* set all lun device's  period, offset */
2849         if (dcb->identify_msg & 0x07)
2850                 return;
2851
2852         if (acb->scan_devices) {
2853                 current_sync_offset = dcb->sync_offset;
2854                 return;
2855         }
2856
2857         list_for_each_entry(i, &acb->dcb_list, list)
2858                 if (i->target_id == dcb->target_id) {
2859                         i->sync_period = dcb->sync_period;
2860                         i->sync_offset = dcb->sync_offset;
2861                         i->sync_mode = dcb->sync_mode;
2862                         i->min_nego_period = dcb->min_nego_period;
2863                 }
2864 }
2865
2866
2867 static void disconnect(struct AdapterCtlBlk *acb)
2868 {
2869         struct DeviceCtlBlk *dcb = acb->active_dcb;
2870         struct ScsiReqBlk *srb;
2871
2872         if (!dcb) {
2873                 dprintkl(KERN_ERR, "disconnect: No such device\n");
2874                 udelay(500);
2875                 /* Suspend queue for a while */
2876                 acb->last_reset =
2877                     jiffies + HZ / 2 +
2878                     HZ * acb->eeprom.delay_time;
2879                 clear_fifo(acb, "disconnectEx");
2880                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2881                 return;
2882         }
2883         srb = dcb->active_srb;
2884         acb->active_dcb = NULL;
2885         dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
2886
2887         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
2888         clear_fifo(acb, "disconnect");
2889         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2890         if (srb->state & SRB_UNEXPECT_RESEL) {
2891                 dprintkl(KERN_ERR,
2892                         "disconnect: Unexpected reselection <%02i-%i>\n",
2893                         dcb->target_id, dcb->target_lun);
2894                 srb->state = 0;
2895                 waiting_process_next(acb);
2896         } else if (srb->state & SRB_ABORT_SENT) {
2897                 dcb->flag &= ~ABORT_DEV_;
2898                 acb->last_reset = jiffies + HZ / 2 + 1;
2899                 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
2900                 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
2901                 waiting_process_next(acb);
2902         } else {
2903                 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
2904                     || !(srb->
2905                          state & (SRB_DISCONNECT | SRB_COMPLETED))) {
2906                         /*
2907                          * Selection time out
2908                          * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
2909                          */
2910                         /* Unexp. Disc / Sel Timeout */
2911                         if (srb->state != SRB_START_
2912                             && srb->state != SRB_MSGOUT) {
2913                                 srb->state = SRB_READY;
2914                                 dprintkl(KERN_DEBUG,
2915                                         "disconnect: (0x%p) Unexpected\n",
2916                                         srb->cmd);
2917                                 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
2918                                 goto disc1;
2919                         } else {
2920                                 /* Normal selection timeout */
2921                                 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
2922                                         "<%02i-%i> SelTO\n", srb->cmd,
2923                                         dcb->target_id, dcb->target_lun);
2924                                 if (srb->retry_count++ > DC395x_MAX_RETRIES
2925                                     || acb->scan_devices) {
2926                                         srb->target_status =
2927                                             SCSI_STAT_SEL_TIMEOUT;
2928                                         goto disc1;
2929                                 }
2930                                 free_tag(dcb, srb);
2931                                 list_move(&srb->list, &dcb->srb_waiting_list);
2932                                 dprintkdbg(DBG_KG,
2933                                         "disconnect: (0x%p) Retry\n",
2934                                         srb->cmd);
2935                                 waiting_set_timer(acb, HZ / 20);
2936                         }
2937                 } else if (srb->state & SRB_DISCONNECT) {
2938                         u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
2939                         /*
2940                          * SRB_DISCONNECT (This is what we expect!)
2941                          */
2942                         if (bval & 0x40) {
2943                                 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
2944                                         " 0x%02x: ACK set! Other controllers?\n",
2945                                         bval);
2946                                 /* It could come from another initiator, therefore don't do much ! */
2947                         } else
2948                                 waiting_process_next(acb);
2949                 } else if (srb->state & SRB_COMPLETED) {
2950                       disc1:
2951                         /*
2952                          ** SRB_COMPLETED
2953                          */
2954                         free_tag(dcb, srb);
2955                         dcb->active_srb = NULL;
2956                         srb->state = SRB_FREE;
2957                         srb_done(acb, dcb, srb);
2958                 }
2959         }
2960 }
2961
2962
2963 static void reselect(struct AdapterCtlBlk *acb)
2964 {
2965         struct DeviceCtlBlk *dcb = acb->active_dcb;
2966         struct ScsiReqBlk *srb = NULL;
2967         u16 rsel_tar_lun_id;
2968         u8 id, lun;
2969         dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
2970
2971         clear_fifo(acb, "reselect");
2972         /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
2973         /* Read Reselected Target ID and LUN */
2974         rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
2975         if (dcb) {              /* Arbitration lost but Reselection win */
2976                 srb = dcb->active_srb;
2977                 if (!srb) {
2978                         dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
2979                                 "but active_srb == NULL\n");
2980                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2981                         return;
2982                 }
2983                 /* Why the if ? */
2984                 if (!acb->scan_devices) {
2985                         dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
2986                                 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
2987                                 srb->cmd, dcb->target_id,
2988                                 dcb->target_lun, rsel_tar_lun_id,
2989                                 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
2990                         /*srb->state |= SRB_DISCONNECT; */
2991
2992                         srb->state = SRB_READY;
2993                         free_tag(dcb, srb);
2994                         list_move(&srb->list, &dcb->srb_waiting_list);
2995                         waiting_set_timer(acb, HZ / 20);
2996
2997                         /* return; */
2998                 }
2999         }
3000         /* Read Reselected Target Id and LUN */
3001         if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3002                 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3003                         "Got %i!\n", rsel_tar_lun_id);
3004         id = rsel_tar_lun_id & 0xff;
3005         lun = (rsel_tar_lun_id >> 8) & 7;
3006         dcb = find_dcb(acb, id, lun);
3007         if (!dcb) {
3008                 dprintkl(KERN_ERR, "reselect: From non existent device "
3009                         "<%02i-%i>\n", id, lun);
3010                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3011                 return;
3012         }
3013         acb->active_dcb = dcb;
3014
3015         if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3016                 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3017                         "disconnection? <%02i-%i>\n",
3018                         dcb->target_id, dcb->target_lun);
3019
3020         if (dcb->sync_mode & EN_TAG_QUEUEING) {
3021                 srb = acb->tmp_srb;
3022                 dcb->active_srb = srb;
3023         } else {
3024                 /* There can be only one! */
3025                 srb = dcb->active_srb;
3026                 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3027                         /*
3028                          * abort command
3029                          */
3030                         dprintkl(KERN_DEBUG,
3031                                 "reselect: w/o disconnected cmds <%02i-%i>\n",
3032                                 dcb->target_id, dcb->target_lun);
3033                         srb = acb->tmp_srb;
3034                         srb->state = SRB_UNEXPECT_RESEL;
3035                         dcb->active_srb = srb;
3036                         enable_msgout_abort(acb, srb);
3037                 } else {
3038                         if (dcb->flag & ABORT_DEV_) {
3039                                 /*srb->state = SRB_ABORT_SENT; */
3040                                 enable_msgout_abort(acb, srb);
3041                         } else
3042                                 srb->state = SRB_DATA_XFER;
3043
3044                 }
3045         }
3046         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
3047
3048         /* Program HA ID, target ID, period and offset */
3049         dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3050         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);     /* host   ID */
3051         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);            /* target ID */
3052         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);            /* offset    */
3053         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);              /* sync period, wide */
3054         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);              /* it's important for atn stop */
3055         /* SCSI command */
3056         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3057 }
3058
3059
3060 static inline u8 tagq_blacklist(char *name)
3061 {
3062 #ifndef DC395x_NO_TAGQ
3063 #if 0
3064         u8 i;
3065         for (i = 0; i < BADDEVCNT; i++)
3066                 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3067                         return 1;
3068 #endif
3069         return 0;
3070 #else
3071         return 1;
3072 #endif
3073 }
3074
3075
3076 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3077 {
3078         /* Check for SCSI format (ANSI and Response data format) */
3079         if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3080                 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3081                     && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3082                     /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3083                     /* ((dcb->dev_type == TYPE_DISK)
3084                        || (dcb->dev_type == TYPE_MOD)) && */
3085                     !tagq_blacklist(((char *)ptr) + 8)) {
3086                         if (dcb->max_command == 1)
3087                                 dcb->max_command =
3088                                     dcb->acb->tag_max_num;
3089                         dcb->sync_mode |= EN_TAG_QUEUEING;
3090                         /*dcb->tag_mask = 0; */
3091                 } else
3092                         dcb->max_command = 1;
3093         }
3094 }
3095
3096
3097 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3098                 struct ScsiInqData *ptr)
3099 {
3100         u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3101         dcb->dev_type = bval1;
3102         /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3103         disc_tagq_set(dcb, ptr);
3104 }
3105
3106
3107 /* unmap mapped pci regions from SRB */
3108 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3109 {
3110         struct scsi_cmnd *cmd = srb->cmd;
3111         enum dma_data_direction dir = cmd->sc_data_direction;
3112
3113         if (scsi_sg_count(cmd) && dir != DMA_NONE) {
3114                 /* unmap DC395x SG list */
3115                 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3116                         srb->sg_bus_addr, SEGMENTX_LEN);
3117                 dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN,
3118                                 DMA_TO_DEVICE);
3119                 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3120                            scsi_sg_count(cmd), scsi_bufflen(cmd));
3121                 /* unmap the sg segments */
3122                 scsi_dma_unmap(cmd);
3123         }
3124 }
3125
3126
3127 /* unmap mapped pci sense buffer from SRB */
3128 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3129                 struct ScsiReqBlk *srb)
3130 {
3131         if (!(srb->flag & AUTO_REQSENSE))
3132                 return;
3133         /* Unmap sense buffer */
3134         dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3135                srb->segment_x[0].address);
3136         dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address,
3137                          srb->segment_x[0].length, DMA_FROM_DEVICE);
3138         /* Restore SG stuff */
3139         srb->total_xfer_length = srb->xferred;
3140         srb->segment_x[0].address =
3141             srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3142         srb->segment_x[0].length =
3143             srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3144 }
3145
3146
3147 /*
3148  * Complete execution of a SCSI command
3149  * Signal completion to the generic SCSI driver
3150  */
3151 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3152                 struct ScsiReqBlk *srb)
3153 {
3154         u8 tempcnt, status;
3155         struct scsi_cmnd *cmd = srb->cmd;
3156         enum dma_data_direction dir = cmd->sc_data_direction;
3157         int ckc_only = 1;
3158
3159         dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3160                 srb->cmd->device->id, (u8)srb->cmd->device->lun);
3161         dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3162                    srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3163                    scsi_sgtalbe(cmd));
3164         status = srb->target_status;
3165         set_host_byte(cmd, DID_OK);
3166         set_status_byte(cmd, SAM_STAT_GOOD);
3167         if (srb->flag & AUTO_REQSENSE) {
3168                 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3169                 pci_unmap_srb_sense(acb, srb);
3170                 /*
3171                  ** target status..........................
3172                  */
3173                 srb->flag &= ~AUTO_REQSENSE;
3174                 srb->adapter_status = 0;
3175                 srb->target_status = SAM_STAT_CHECK_CONDITION;
3176                 if (debug_enabled(DBG_1)) {
3177                         switch (cmd->sense_buffer[2] & 0x0f) {
3178                         case NOT_READY:
3179                                 dprintkl(KERN_DEBUG,
3180                                      "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3181                                      cmd->cmnd[0], dcb->target_id,
3182                                      dcb->target_lun, status, acb->scan_devices);
3183                                 break;
3184                         case UNIT_ATTENTION:
3185                                 dprintkl(KERN_DEBUG,
3186                                      "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3187                                      cmd->cmnd[0], dcb->target_id,
3188                                      dcb->target_lun, status, acb->scan_devices);
3189                                 break;
3190                         case ILLEGAL_REQUEST:
3191                                 dprintkl(KERN_DEBUG,
3192                                      "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3193                                      cmd->cmnd[0], dcb->target_id,
3194                                      dcb->target_lun, status, acb->scan_devices);
3195                                 break;
3196                         case MEDIUM_ERROR:
3197                                 dprintkl(KERN_DEBUG,
3198                                      "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3199                                      cmd->cmnd[0], dcb->target_id,
3200                                      dcb->target_lun, status, acb->scan_devices);
3201                                 break;
3202                         case HARDWARE_ERROR:
3203                                 dprintkl(KERN_DEBUG,
3204                                      "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3205                                      cmd->cmnd[0], dcb->target_id,
3206                                      dcb->target_lun, status, acb->scan_devices);
3207                                 break;
3208                         }
3209                         if (cmd->sense_buffer[7] >= 6)
3210                                 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3211                                         "(0x%08x 0x%08x)\n",
3212                                         cmd->sense_buffer[2], cmd->sense_buffer[12],
3213                                         cmd->sense_buffer[13],
3214                                         *((unsigned int *)(cmd->sense_buffer + 3)),
3215                                         *((unsigned int *)(cmd->sense_buffer + 8)));
3216                         else
3217                                 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3218                                         cmd->sense_buffer[2],
3219                                         *((unsigned int *)(cmd->sense_buffer + 3)));
3220                 }
3221
3222                 if (status == SAM_STAT_CHECK_CONDITION) {
3223                         set_host_byte(cmd, DID_BAD_TARGET);
3224                         goto ckc_e;
3225                 }
3226                 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3227
3228                 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);
3229
3230                 goto ckc_e;
3231         }
3232
3233 /*************************************************************/
3234         if (status) {
3235                 /*
3236                  * target status..........................
3237                  */
3238                 if (status == SAM_STAT_CHECK_CONDITION) {
3239                         request_sense(acb, dcb, srb);
3240                         return;
3241                 } else if (status == SAM_STAT_TASK_SET_FULL) {
3242                         tempcnt = (u8)list_size(&dcb->srb_going_list);
3243                         dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3244                              dcb->target_id, dcb->target_lun, tempcnt);
3245                         if (tempcnt > 1)
3246                                 tempcnt--;
3247                         dcb->max_command = tempcnt;
3248                         free_tag(dcb, srb);
3249                         list_move(&srb->list, &dcb->srb_waiting_list);
3250                         waiting_set_timer(acb, HZ / 20);
3251                         srb->adapter_status = 0;
3252                         srb->target_status = 0;
3253                         return;
3254                 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3255                         srb->adapter_status = H_SEL_TIMEOUT;
3256                         srb->target_status = 0;
3257                         set_host_byte(cmd, DID_NO_CONNECT);
3258                 } else {
3259                         srb->adapter_status = 0;
3260                         set_host_byte(cmd, DID_ERROR);
3261                         set_status_byte(cmd, status);
3262                 }
3263         } else {
3264                 /*
3265                  ** process initiator status..........................
3266                  */
3267                 status = srb->adapter_status;
3268                 if (status & H_OVER_UNDER_RUN) {
3269                         srb->target_status = 0;
3270                         scsi_msg_to_host_byte(cmd, srb->end_message);
3271                 } else if (srb->status & PARITY_ERROR) {
3272                         set_host_byte(cmd, DID_PARITY);
3273                 } else {        /* No error */
3274
3275                         srb->adapter_status = 0;
3276                         srb->target_status = 0;
3277                 }
3278         }
3279
3280         ckc_only = 0;
3281 /* Check Error Conditions */
3282       ckc_e:
3283
3284         pci_unmap_srb(acb, srb);
3285
3286         if (cmd->cmnd[0] == INQUIRY) {
3287                 unsigned char *base = NULL;
3288                 struct ScsiInqData *ptr;
3289                 unsigned long flags = 0;
3290                 struct scatterlist* sg = scsi_sglist(cmd);
3291                 size_t offset = 0, len = sizeof(struct ScsiInqData);
3292
3293                 local_irq_save(flags);
3294                 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3295                 ptr = (struct ScsiInqData *)(base + offset);
3296
3297                 if (!ckc_only && get_host_byte(cmd) == DID_OK
3298                     && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3299                     && dir != DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3300                         dcb->inquiry7 = ptr->Flags;
3301
3302         /*if( srb->cmd->cmnd[0] == INQUIRY && */
3303         /*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3304                 if ((get_host_byte(cmd) == DID_OK) ||
3305                     (get_status_byte(cmd) == SAM_STAT_CHECK_CONDITION)) {
3306                         if (!dcb->init_tcq_flag) {
3307                                 add_dev(acb, dcb, ptr);
3308                                 dcb->init_tcq_flag = 1;
3309                         }
3310                 }
3311
3312                 scsi_kunmap_atomic_sg(base);
3313                 local_irq_restore(flags);
3314         }
3315
3316         /* Here is the info for Doug Gilbert's sg3 ... */
3317         scsi_set_resid(cmd, srb->total_xfer_length);
3318         /* This may be interpreted by sb. or not ... */
3319         cmd->SCp.this_residual = srb->total_xfer_length;
3320         cmd->SCp.buffers_residual = 0;
3321         if (debug_enabled(DBG_KG)) {
3322                 if (srb->total_xfer_length)
3323                         dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3324                                 "cmnd=0x%02x Missed %i bytes\n",
3325                                 cmd, cmd->device->id, (u8)cmd->device->lun,
3326                                 cmd->cmnd[0], srb->total_xfer_length);
3327         }
3328
3329         if (srb != acb->tmp_srb) {
3330                 /* Add to free list */
3331                 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3332                            cmd, cmd->result);
3333                 list_move_tail(&srb->list, &acb->srb_free_list);
3334         } else {
3335                 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3336         }
3337
3338         scsi_done(cmd);
3339         waiting_process_next(acb);
3340 }
3341
3342
3343 /* abort all cmds in our queues */
3344 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3345                 struct scsi_cmnd *cmd, u8 force)
3346 {
3347         struct DeviceCtlBlk *dcb;
3348         dprintkl(KERN_INFO, "doing_srb_done: pids ");
3349
3350         list_for_each_entry(dcb, &acb->dcb_list, list) {
3351                 struct ScsiReqBlk *srb;
3352                 struct ScsiReqBlk *tmp;
3353                 struct scsi_cmnd *p;
3354
3355                 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3356                         p = srb->cmd;
3357                         printk("G:%p(%02i-%i) ", p,
3358                                p->device->id, (u8)p->device->lun);
3359                         list_del(&srb->list);
3360                         free_tag(dcb, srb);
3361                         list_add_tail(&srb->list, &acb->srb_free_list);
3362                         set_host_byte(p, did_flag);
3363                         set_status_byte(p, SAM_STAT_GOOD);
3364                         pci_unmap_srb_sense(acb, srb);
3365                         pci_unmap_srb(acb, srb);
3366                         if (force) {
3367                                 /* For new EH, we normally don't need to give commands back,
3368                                  * as they all complete or all time out */
3369                                 scsi_done(p);
3370                         }
3371                 }
3372                 if (!list_empty(&dcb->srb_going_list))
3373                         dprintkl(KERN_DEBUG,
3374                                "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3375                                dcb->target_id, dcb->target_lun);
3376                 if (dcb->tag_mask)
3377                         dprintkl(KERN_DEBUG,
3378                                "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3379                                dcb->target_id, dcb->target_lun,
3380                                dcb->tag_mask);
3381
3382                 /* Waiting queue */
3383                 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3384                         p = srb->cmd;
3385
3386                         printk("W:%p<%02i-%i>", p, p->device->id,
3387                                (u8)p->device->lun);
3388                         list_move_tail(&srb->list, &acb->srb_free_list);
3389                         set_host_byte(p, did_flag);
3390                         set_status_byte(p, SAM_STAT_GOOD);
3391                         pci_unmap_srb_sense(acb, srb);
3392                         pci_unmap_srb(acb, srb);
3393                         if (force) {
3394                                 /* For new EH, we normally don't need to give commands back,
3395                                  * as they all complete or all time out */
3396                                 scsi_done(cmd);
3397                         }
3398                 }
3399                 if (!list_empty(&dcb->srb_waiting_list))
3400                         dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3401                              list_size(&dcb->srb_waiting_list), dcb->target_id,
3402                              dcb->target_lun);
3403                 dcb->flag &= ~ABORT_DEV_;
3404         }
3405         printk("\n");
3406 }
3407
3408
3409 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3410 {
3411         dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3412         acb->acb_flag |= RESET_DEV;     /* RESET_DETECT, RESET_DONE, RESET_DEV */
3413         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3414
3415         while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3416                 /* nothing */;
3417 }
3418
3419
3420 static void set_basic_config(struct AdapterCtlBlk *acb)
3421 {
3422         u8 bval;
3423         u16 wval;
3424         DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3425         if (acb->config & HCC_PARITY)
3426                 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3427         else
3428                 bval = PHASELATCH | INITIATOR | BLOCKRST;
3429
3430         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3431
3432         /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3433         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);       /* was 0x13: default */
3434         /* program Host ID                  */
3435         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3436         /* set ansynchronous transfer       */
3437         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3438         /* Turn LED control off */
3439         wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3440         DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3441         /* DMA config          */
3442         wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3443         wval |=
3444             DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3445         DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3446         /* Clear pending interrupt status */
3447         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3448         /* Enable SCSI interrupt    */
3449         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3450         DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3451                       /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3452                       );
3453 }
3454
3455
3456 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3457 {
3458         dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3459         /* delay half a second */
3460         if (timer_pending(&acb->waiting_timer))
3461                 del_timer(&acb->waiting_timer);
3462
3463         DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3464         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3465         /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3466         udelay(500);
3467         /* Maybe we locked up the bus? Then lets wait even longer ... */
3468         acb->last_reset =
3469             jiffies + 5 * HZ / 2 +
3470             HZ * acb->eeprom.delay_time;
3471
3472         clear_fifo(acb, "scsi_reset_detect");
3473         set_basic_config(acb);
3474         /*1.25 */
3475         /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3476
3477         if (acb->acb_flag & RESET_DEV) {        /* RESET_DETECT, RESET_DONE, RESET_DEV */
3478                 acb->acb_flag |= RESET_DONE;
3479         } else {
3480                 acb->acb_flag |= RESET_DETECT;
3481                 reset_dev_param(acb);
3482                 doing_srb_done(acb, DID_RESET, NULL, 1);
3483                 /*DC395x_RecoverSRB( acb ); */
3484                 acb->active_dcb = NULL;
3485                 acb->acb_flag = 0;
3486                 waiting_process_next(acb);
3487         }
3488 }
3489
3490
3491 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3492                 struct ScsiReqBlk *srb)
3493 {
3494         struct scsi_cmnd *cmd = srb->cmd;
3495         dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3496                 cmd, cmd->device->id, (u8)cmd->device->lun);
3497
3498         srb->flag |= AUTO_REQSENSE;
3499         srb->adapter_status = 0;
3500         srb->target_status = 0;
3501
3502         /* KG: Can this prevent crap sense data ? */
3503         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3504
3505         /* Save some data */
3506         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3507             srb->segment_x[0].address;
3508         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3509             srb->segment_x[0].length;
3510         srb->xferred = srb->total_xfer_length;
3511         /* srb->segment_x : a one entry of S/G list table */
3512         srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3513         srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3514         /* Map sense buffer */
3515         srb->segment_x[0].address = dma_map_single(&acb->dev->dev,
3516                         cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
3517                         DMA_FROM_DEVICE);
3518         dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3519                cmd->sense_buffer, srb->segment_x[0].address,
3520                SCSI_SENSE_BUFFERSIZE);
3521         srb->sg_count = 1;
3522         srb->sg_index = 0;
3523
3524         if (start_scsi(acb, dcb, srb)) {        /* Should only happen, if sb. else grabs the bus */
3525                 dprintkl(KERN_DEBUG,
3526                         "request_sense: (0x%p) failed <%02i-%i>\n",
3527                         srb->cmd, dcb->target_id, dcb->target_lun);
3528                 list_move(&srb->list, &dcb->srb_waiting_list);
3529                 waiting_set_timer(acb, HZ / 100);
3530         }
3531 }
3532
3533
3534 /**
3535  * device_alloc - Allocate a new device instance. This create the
3536  * devices instance and sets up all the data items. The adapter
3537  * instance is required to obtain confiuration information for this
3538  * device. This does *not* add this device to the adapters device
3539  * list.
3540  *
3541  * @acb: The adapter to obtain configuration information from.
3542  * @target: The target for the new device.
3543  * @lun: The lun for the new device.
3544  *
3545  * Return the new device if successful or NULL on failure.
3546  **/
3547 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3548                 u8 target, u8 lun)
3549 {
3550         struct NvRamType *eeprom = &acb->eeprom;
3551         u8 period_index = eeprom->target[target].period & 0x07;
3552         struct DeviceCtlBlk *dcb;
3553
3554         dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3555         dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3556         if (!dcb)
3557                 return NULL;
3558         dcb->acb = NULL;
3559         INIT_LIST_HEAD(&dcb->srb_going_list);
3560         INIT_LIST_HEAD(&dcb->srb_waiting_list);
3561         dcb->active_srb = NULL;
3562         dcb->tag_mask = 0;
3563         dcb->max_command = 1;
3564         dcb->target_id = target;
3565         dcb->target_lun = lun;
3566         dcb->dev_mode = eeprom->target[target].cfg0;
3567 #ifndef DC395x_NO_DISCONNECT
3568         dcb->identify_msg =
3569             IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3570 #else
3571         dcb->identify_msg = IDENTIFY(0, lun);
3572 #endif
3573         dcb->inquiry7 = 0;
3574         dcb->sync_mode = 0;
3575         dcb->min_nego_period = clock_period[period_index];
3576         dcb->sync_period = 0;
3577         dcb->sync_offset = 0;
3578         dcb->flag = 0;
3579
3580 #ifndef DC395x_NO_WIDE
3581         if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3582             && (acb->config & HCC_WIDE_CARD))
3583                 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3584 #endif
3585 #ifndef DC395x_NO_SYNC
3586         if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3587                 if (!(lun) || current_sync_offset)
3588                         dcb->sync_mode |= SYNC_NEGO_ENABLE;
3589 #endif
3590         if (dcb->target_lun != 0) {
3591                 /* Copy settings */
3592                 struct DeviceCtlBlk *p;
3593                 list_for_each_entry(p, &acb->dcb_list, list)
3594                         if (p->target_id == dcb->target_id)
3595                                 break;
3596                 dprintkdbg(DBG_1,
3597                        "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3598                        dcb->target_id, dcb->target_lun,
3599                        p->target_id, p->target_lun);
3600                 dcb->sync_mode = p->sync_mode;
3601                 dcb->sync_period = p->sync_period;
3602                 dcb->min_nego_period = p->min_nego_period;
3603                 dcb->sync_offset = p->sync_offset;
3604                 dcb->inquiry7 = p->inquiry7;
3605         }
3606         return dcb;
3607 }
3608
3609
3610 /**
3611  * adapter_add_device - Adds the device instance to the adaptor instance.
3612  *
3613  * @acb: The adapter device to be updated
3614  * @dcb: A newly created and initialised device instance to add.
3615  **/
3616 static void adapter_add_device(struct AdapterCtlBlk *acb,
3617                 struct DeviceCtlBlk *dcb)
3618 {
3619         /* backpointer to adapter */
3620         dcb->acb = acb;
3621
3622         /* set run_robin to this device if it is currently empty */
3623         if (list_empty(&acb->dcb_list))
3624                 acb->dcb_run_robin = dcb;
3625
3626         /* add device to list */
3627         list_add_tail(&dcb->list, &acb->dcb_list);
3628
3629         /* update device maps */
3630         acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3631         acb->children[dcb->target_id][dcb->target_lun] = dcb;
3632 }
3633
3634
3635 /**
3636  * adapter_remove_device - Removes the device instance from the adaptor
3637  * instance. The device instance is not check in any way or freed by this.
3638  * The caller is expected to take care of that. This will simply remove the
3639  * device from the adapters data strcutures.
3640  *
3641  * @acb: The adapter device to be updated
3642  * @dcb: A device that has previously been added to the adapter.
3643  **/
3644 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3645                 struct DeviceCtlBlk *dcb)
3646 {
3647         struct DeviceCtlBlk *i;
3648         struct DeviceCtlBlk *tmp;
3649         dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3650                 dcb->target_id, dcb->target_lun);
3651
3652         /* fix up any pointers to this device that we have in the adapter */
3653         if (acb->active_dcb == dcb)
3654                 acb->active_dcb = NULL;
3655         if (acb->dcb_run_robin == dcb)
3656                 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3657
3658         /* unlink from list */
3659         list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3660                 if (dcb == i) {
3661                         list_del(&i->list);
3662                         break;
3663                 }
3664
3665         /* clear map and children */
3666         acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3667         acb->children[dcb->target_id][dcb->target_lun] = NULL;
3668         dcb->acb = NULL;
3669 }
3670
3671
3672 /**
3673  * adapter_remove_and_free_device - Removes a single device from the adapter
3674  * and then frees the device information.
3675  *
3676  * @acb: The adapter device to be updated
3677  * @dcb: A device that has previously been added to the adapter.
3678  */
3679 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3680                 struct DeviceCtlBlk *dcb)
3681 {
3682         if (list_size(&dcb->srb_going_list) > 1) {
3683                 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3684                            "Won't remove because of %i active requests.\n",
3685                            dcb->target_id, dcb->target_lun,
3686                            list_size(&dcb->srb_going_list));
3687                 return;
3688         }
3689         adapter_remove_device(acb, dcb);
3690         kfree(dcb);
3691 }
3692
3693
3694 /**
3695  * adapter_remove_and_free_all_devices - Removes and frees all of the
3696  * devices associated with the specified adapter.
3697  *
3698  * @acb: The adapter from which all devices should be removed.
3699  **/
3700 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3701 {
3702         struct DeviceCtlBlk *dcb;
3703         struct DeviceCtlBlk *tmp;
3704         dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3705                    list_size(&acb->dcb_list));
3706
3707         list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3708                 adapter_remove_and_free_device(acb, dcb);
3709 }
3710
3711
3712 /**
3713  * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3714  * scsi device that we need to deal with. We allocate a new device and then
3715  * insert that device into the adapters device list.
3716  *
3717  * @scsi_device: The new scsi device that we need to handle.
3718  **/
3719 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3720 {
3721         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3722         struct DeviceCtlBlk *dcb;
3723
3724         dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3725         if (!dcb)
3726                 return -ENOMEM;
3727         adapter_add_device(acb, dcb);
3728
3729         return 0;
3730 }
3731
3732
3733 /**
3734  * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3735  * device that is going away.
3736  *
3737  * @scsi_device: The new scsi device that we need to handle.
3738  **/
3739 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3740 {
3741         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3742         struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3743         if (dcb)
3744                 adapter_remove_and_free_device(acb, dcb);
3745 }
3746
3747
3748
3749
3750 /**
3751  * trms1040_wait_30us: wait for 30 us
3752  *
3753  * Waits for 30us (using the chip by the looks of it..)
3754  *
3755  * @io_port: base I/O address
3756  **/
3757 static void trms1040_wait_30us(unsigned long io_port)
3758 {
3759         /* ScsiPortStallExecution(30); wait 30 us */
3760         outb(5, io_port + TRM_S1040_GEN_TIMER);
3761         while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3762                 /* nothing */ ;
3763 }
3764
3765
3766 /**
3767  * trms1040_write_cmd - write the secified command and address to
3768  * chip
3769  *
3770  * @io_port:    base I/O address
3771  * @cmd:        SB + op code (command) to send
3772  * @addr:       address to send
3773  **/
3774 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3775 {
3776         int i;
3777         u8 send_data;
3778
3779         /* program SB + OP code */
3780         for (i = 0; i < 3; i++, cmd <<= 1) {
3781                 send_data = NVR_SELECT;
3782                 if (cmd & 0x04) /* Start from bit 2 */
3783                         send_data |= NVR_BITOUT;
3784
3785                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3786                 trms1040_wait_30us(io_port);
3787                 outb((send_data | NVR_CLOCK),
3788                      io_port + TRM_S1040_GEN_NVRAM);
3789                 trms1040_wait_30us(io_port);
3790         }
3791
3792         /* send address */
3793         for (i = 0; i < 7; i++, addr <<= 1) {
3794                 send_data = NVR_SELECT;
3795                 if (addr & 0x40)        /* Start from bit 6 */
3796                         send_data |= NVR_BITOUT;
3797
3798                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3799                 trms1040_wait_30us(io_port);
3800                 outb((send_data | NVR_CLOCK),
3801                      io_port + TRM_S1040_GEN_NVRAM);
3802                 trms1040_wait_30us(io_port);
3803         }
3804         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3805         trms1040_wait_30us(io_port);
3806 }
3807
3808
3809 /**
3810  * trms1040_set_data - store a single byte in the eeprom
3811  *
3812  * Called from write all to write a single byte into the SSEEPROM
3813  * Which is done one bit at a time.
3814  *
3815  * @io_port:    base I/O address
3816  * @addr:       offset into EEPROM
3817  * @byte:       bytes to write
3818  **/
3819 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
3820 {
3821         int i;
3822         u8 send_data;
3823
3824         /* Send write command & address */
3825         trms1040_write_cmd(io_port, 0x05, addr);
3826
3827         /* Write data */
3828         for (i = 0; i < 8; i++, byte <<= 1) {
3829                 send_data = NVR_SELECT;
3830                 if (byte & 0x80)        /* Start from bit 7 */
3831                         send_data |= NVR_BITOUT;
3832
3833                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3834                 trms1040_wait_30us(io_port);
3835                 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3836                 trms1040_wait_30us(io_port);
3837         }
3838         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3839         trms1040_wait_30us(io_port);
3840
3841         /* Disable chip select */
3842         outb(0, io_port + TRM_S1040_GEN_NVRAM);
3843         trms1040_wait_30us(io_port);
3844
3845         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3846         trms1040_wait_30us(io_port);
3847
3848         /* Wait for write ready */
3849         while (1) {
3850                 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3851                 trms1040_wait_30us(io_port);
3852
3853                 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3854                 trms1040_wait_30us(io_port);
3855
3856                 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
3857                         break;
3858         }
3859
3860         /*  Disable chip select */
3861         outb(0, io_port + TRM_S1040_GEN_NVRAM);
3862 }
3863
3864
3865 /**
3866  * trms1040_write_all - write 128 bytes to the eeprom
3867  *
3868  * Write the supplied 128 bytes to the chips SEEPROM
3869  *
3870  * @eeprom:     the data to write
3871  * @io_port:    the base io port
3872  **/
3873 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
3874 {
3875         u8 *b_eeprom = (u8 *)eeprom;
3876         u8 addr;
3877
3878         /* Enable SEEPROM */
3879         outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3880              io_port + TRM_S1040_GEN_CONTROL);
3881
3882         /* write enable */
3883         trms1040_write_cmd(io_port, 0x04, 0xFF);
3884         outb(0, io_port + TRM_S1040_GEN_NVRAM);
3885         trms1040_wait_30us(io_port);
3886
3887         /* write */
3888         for (addr = 0; addr < 128; addr++, b_eeprom++)
3889                 trms1040_set_data(io_port, addr, *b_eeprom);
3890
3891         /* write disable */
3892         trms1040_write_cmd(io_port, 0x04, 0x00);
3893         outb(0, io_port + TRM_S1040_GEN_NVRAM);
3894         trms1040_wait_30us(io_port);
3895
3896         /* Disable SEEPROM */
3897         outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3898              io_port + TRM_S1040_GEN_CONTROL);
3899 }
3900
3901
3902 /**
3903  * trms1040_get_data - get a single byte from the eeprom
3904  *
3905  * Called from read all to read a single byte into the SSEEPROM
3906  * Which is done one bit at a time.
3907  *
3908  * @io_port:    base I/O address
3909  * @addr:       offset into SEEPROM
3910  *
3911  * Returns the byte read.
3912  **/
3913 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
3914 {
3915         int i;
3916         u8 read_byte;
3917         u8 result = 0;
3918
3919         /* Send read command & address */
3920         trms1040_write_cmd(io_port, 0x06, addr);
3921
3922         /* read data */
3923         for (i = 0; i < 8; i++) {
3924                 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3925                 trms1040_wait_30us(io_port);
3926                 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3927
3928                 /* Get data bit while falling edge */
3929                 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
3930                 result <<= 1;
3931                 if (read_byte & NVR_BITIN)
3932                         result |= 1;
3933
3934                 trms1040_wait_30us(io_port);
3935         }
3936
3937         /* Disable chip select */
3938         outb(0, io_port + TRM_S1040_GEN_NVRAM);
3939         return result;
3940 }
3941
3942
3943 /**
3944  * trms1040_read_all - read all bytes from the eeprom
3945  *
3946  * Read the 128 bytes from the SEEPROM.
3947  *
3948  * @eeprom:     where to store the data
3949  * @io_port:    the base io port
3950  **/
3951 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
3952 {
3953         u8 *b_eeprom = (u8 *)eeprom;
3954         u8 addr;
3955
3956         /* Enable SEEPROM */
3957         outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3958              io_port + TRM_S1040_GEN_CONTROL);
3959
3960         /* read details */
3961         for (addr = 0; addr < 128; addr++, b_eeprom++)
3962                 *b_eeprom = trms1040_get_data(io_port, addr);
3963
3964         /* Disable SEEPROM */
3965         outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3966              io_port + TRM_S1040_GEN_CONTROL);
3967 }
3968
3969
3970
3971 /**
3972  * check_eeprom - get and check contents of the eeprom
3973  *
3974  * Read seeprom 128 bytes into the memory provider in eeprom.
3975  * Checks the checksum and if it's not correct it uses a set of default
3976  * values.
3977  *
3978  * @eeprom:     caller allocated strcuture to read the eeprom data into
3979  * @io_port:    io port to read from
3980  **/
3981 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
3982 {
3983         u16 *w_eeprom = (u16 *)eeprom;
3984         u16 w_addr;
3985         u16 cksum;
3986         u32 d_addr;
3987         u32 *d_eeprom;
3988
3989         trms1040_read_all(eeprom, io_port);     /* read eeprom */
3990
3991         cksum = 0;
3992         for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
3993              w_addr++, w_eeprom++)
3994                 cksum += *w_eeprom;
3995         if (cksum != 0x1234) {
3996                 /*
3997                  * Checksum is wrong.
3998                  * Load a set of defaults into the eeprom buffer
3999                  */
4000                 dprintkl(KERN_WARNING,
4001                         "EEProm checksum error: using default values and options.\n");
4002                 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4003                 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4004                 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4005                 eeprom->sub_sys_id[1] =
4006                     (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4007                 eeprom->sub_class = 0x00;
4008                 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4009                 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4010                 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4011                 eeprom->device_id[1] =
4012                     (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4013                 eeprom->reserved = 0x00;
4014
4015                 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4016                      d_addr < 16; d_addr++, d_eeprom++)
4017                         *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4018
4019                 *d_eeprom++ = 0x04000F07;       /* max_tag,delay_time,channel_cfg,scsi_id */
4020                 *d_eeprom++ = 0x00000015;       /* reserved1,boot_lun,boot_target,reserved0 */
4021                 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4022                         *d_eeprom = 0x00;
4023
4024                 /* Now load defaults (maybe set by boot/module params) */
4025                 set_safe_settings();
4026                 fix_settings();
4027                 eeprom_override(eeprom);
4028
4029                 eeprom->cksum = 0x00;
4030                 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4031                      w_addr < 63; w_addr++, w_eeprom++)
4032                         cksum += *w_eeprom;
4033
4034                 *w_eeprom = 0x1234 - cksum;
4035                 trms1040_write_all(eeprom, io_port);
4036                 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4037         } else {
4038                 set_safe_settings();
4039                 eeprom_index_to_delay(eeprom);
4040                 eeprom_override(eeprom);
4041         }
4042 }
4043
4044
4045 /**
4046  * print_eeprom_settings - output the eeprom settings
4047  * to the kernel log so people can see what they were.
4048  *
4049  * @eeprom: The eeprom data strucutre to show details for.
4050  **/
4051 static void print_eeprom_settings(struct NvRamType *eeprom)
4052 {
4053         dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4054                 eeprom->scsi_id,
4055                 eeprom->target[0].period,
4056                 clock_speed[eeprom->target[0].period] / 10,
4057                 clock_speed[eeprom->target[0].period] % 10,
4058                 eeprom->target[0].cfg0);
4059         dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4060                 eeprom->channel_cfg, eeprom->max_tag,
4061                 1 << eeprom->max_tag, eeprom->delay_time);
4062 }
4063
4064
4065 /* Free SG tables */
4066 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4067 {
4068         int i;
4069         const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4070
4071         for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4072                 kfree(acb->srb_array[i].segment_x);
4073 }
4074
4075
4076 /*
4077  * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4078  * should never cross a page boundary */
4079 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4080 {
4081         const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4082                                     *SEGMENTX_LEN;
4083         int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4084         const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4085         int srb_idx = 0;
4086         unsigned i = 0;
4087         struct SGentry *ptr;
4088
4089         for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4090                 acb->srb_array[i].segment_x = NULL;
4091
4092         dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4093         while (pages--) {
4094                 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4095                 if (!ptr) {
4096                         adapter_sg_tables_free(acb);
4097                         return 1;
4098                 }
4099                 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4100                         PAGE_SIZE, ptr, srb_idx);
4101                 i = 0;
4102                 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4103                         acb->srb_array[srb_idx++].segment_x =
4104                             ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4105         }
4106         if (i < srbs_per_page)
4107                 acb->srb.segment_x =
4108                     ptr + (i * DC395x_MAX_SG_LISTENTRY);
4109         else
4110                 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4111         return 0;
4112 }
4113
4114
4115
4116 /**
4117  * adapter_print_config - print adapter connection and termination
4118  * config
4119  *
4120  * The io port in the adapter needs to have been set before calling
4121  * this function.
4122  *
4123  * @acb: The adapter to print the information for.
4124  **/
4125 static void adapter_print_config(struct AdapterCtlBlk *acb)
4126 {
4127         u8 bval;
4128
4129         bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4130         dprintkl(KERN_INFO, "%sConnectors: ",
4131                 ((bval & WIDESCSI) ? "(Wide) " : ""));
4132         if (!(bval & CON5068))
4133                 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4134         if (!(bval & CON68))
4135                 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4136         if (!(bval & CON50))
4137                 printk("int50 ");
4138         if ((bval & (CON5068 | CON50 | CON68)) ==
4139             0 /*(CON5068 | CON50 | CON68) */ )
4140                 printk(" Oops! (All 3?) ");
4141         bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4142         printk(" Termination: ");
4143         if (bval & DIS_TERM)
4144                 printk("Disabled\n");
4145         else {
4146                 if (bval & AUTOTERM)
4147                         printk("Auto ");
4148                 if (bval & LOW8TERM)
4149                         printk("Low ");
4150                 if (bval & UP8TERM)
4151                         printk("High ");
4152                 printk("\n");
4153         }
4154 }
4155
4156
4157 /**
4158  * adapter_init_params - Initialize the various parameters in the
4159  * adapter structure. Note that the pointer to the scsi_host is set
4160  * early (when this instance is created) and the io_port and irq
4161  * values are set later after they have been reserved. This just gets
4162  * everything set to a good starting position.
4163  *
4164  * The eeprom structure in the adapter needs to have been set before
4165  * calling this function.
4166  *
4167  * @acb: The adapter to initialize.
4168  **/
4169 static void adapter_init_params(struct AdapterCtlBlk *acb)
4170 {
4171         struct NvRamType *eeprom = &acb->eeprom;
4172         int i;
4173
4174         /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4175         /* NOTE: acb->io_port_base is set at port registration time */
4176         /* NOTE: acb->io_port_len is set at port registration time */
4177
4178         INIT_LIST_HEAD(&acb->dcb_list);
4179         acb->dcb_run_robin = NULL;
4180         acb->active_dcb = NULL;
4181
4182         INIT_LIST_HEAD(&acb->srb_free_list);
4183         /*  temp SRB for Q tag used or abort command used  */
4184         acb->tmp_srb = &acb->srb;
4185         timer_setup(&acb->waiting_timer, waiting_timeout, 0);
4186         timer_setup(&acb->selto_timer, NULL, 0);
4187
4188         acb->srb_count = DC395x_MAX_SRB_CNT;
4189
4190         acb->sel_timeout = DC395x_SEL_TIMEOUT;  /* timeout=250ms */
4191         /* NOTE: acb->irq_level is set at IRQ registration time */
4192
4193         acb->tag_max_num = 1 << eeprom->max_tag;
4194         if (acb->tag_max_num > 30)
4195                 acb->tag_max_num = 30;
4196
4197         acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE, RESET_DEV */
4198         acb->gmode2 = eeprom->channel_cfg;
4199         acb->config = 0;        /* NOTE: actually set in adapter_init_chip */
4200
4201         if (eeprom->channel_cfg & NAC_SCANLUN)
4202                 acb->lun_chk = 1;
4203         acb->scan_devices = 1;
4204
4205         acb->scsi_host->this_id = eeprom->scsi_id;
4206         acb->hostid_bit = (1 << acb->scsi_host->this_id);
4207
4208         for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4209                 acb->dcb_map[i] = 0;
4210
4211         acb->msg_len = 0;
4212
4213         /* link static array of srbs into the srb free list */
4214         for (i = 0; i < acb->srb_count - 1; i++)
4215                 list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list);
4216 }
4217
4218
4219 /**
4220  * adapter_init_scsi_host - Initialize the scsi host instance based on
4221  * values that we have already stored in the adapter instance. There's
4222  * some mention that a lot of these are deprecated, so we won't use
4223  * them (we'll use the ones in the adapter instance) but we'll fill
4224  * them in in case something else needs them.
4225  *
4226  * The eeprom structure, irq and io ports in the adapter need to have
4227  * been set before calling this function.
4228  *
4229  * @host: The scsi host instance to fill in the values for.
4230  **/
4231 static void adapter_init_scsi_host(struct Scsi_Host *host)
4232 {
4233         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4234         struct NvRamType *eeprom = &acb->eeprom;
4235
4236         host->max_cmd_len = 24;
4237         host->can_queue = DC395x_MAX_CMD_QUEUE;
4238         host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4239         host->this_id = (int)eeprom->scsi_id;
4240         host->io_port = acb->io_port_base;
4241         host->n_io_port = acb->io_port_len;
4242         host->dma_channel = -1;
4243         host->unique_id = acb->io_port_base;
4244         host->irq = acb->irq_level;
4245         acb->last_reset = jiffies;
4246
4247         host->max_id = 16;
4248         if (host->max_id - 1 == eeprom->scsi_id)
4249                 host->max_id--;
4250
4251         if (eeprom->channel_cfg & NAC_SCANLUN)
4252                 host->max_lun = 8;
4253         else
4254                 host->max_lun = 1;
4255 }
4256
4257
4258 /**
4259  * adapter_init_chip - Get the chip into a know state and figure out
4260  * some of the settings that apply to this adapter.
4261  *
4262  * The io port in the adapter needs to have been set before calling
4263  * this function. The config will be configured correctly on return.
4264  *
4265  * @acb: The adapter which we are to init.
4266  **/
4267 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4268 {
4269         struct NvRamType *eeprom = &acb->eeprom;
4270
4271         /* Mask all the interrupt */
4272         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4273         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4274
4275         /* Reset SCSI module */
4276         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4277
4278         /* Reset PCI/DMA module */
4279         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4280         udelay(20);
4281
4282         /* program configuration 0 */
4283         acb->config = HCC_AUTOTERM | HCC_PARITY;
4284         if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4285                 acb->config |= HCC_WIDE_CARD;
4286
4287         if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4288                 acb->config |= HCC_SCSI_RESET;
4289
4290         if (acb->config & HCC_SCSI_RESET) {
4291                 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4292                 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4293
4294                 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4295                 /*spin_unlock_irq (&io_request_lock); */
4296                 udelay(500);
4297
4298                 acb->last_reset =
4299                     jiffies + HZ / 2 +
4300                     HZ * acb->eeprom.delay_time;
4301
4302                 /*spin_lock_irq (&io_request_lock); */
4303         }
4304 }
4305
4306
4307 /**
4308  * adapter_init - Grab the resource for the card, setup the adapter
4309  * information, set the card into a known state, create the various
4310  * tables etc etc. This basically gets all adapter information all up
4311  * to date, initialised and gets the chip in sync with it.
4312  *
4313  * @acb:        The adapter which we are to init.
4314  * @io_port:    The base I/O port
4315  * @io_port_len: The I/O port size
4316  * @irq:        IRQ
4317  *
4318  * Returns 0 if the initialization succeeds, any other value on
4319  * failure.
4320  **/
4321 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4322                         u32 io_port_len, unsigned int irq)
4323 {
4324         if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4325                 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4326                 goto failed;
4327         }
4328         /* store port base to indicate we have registered it */
4329         acb->io_port_base = io_port;
4330         acb->io_port_len = io_port_len;
4331
4332         if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4333                 /* release the region we just claimed */
4334                 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4335                 goto failed;
4336         }
4337         /* store irq to indicate we have registered it */
4338         acb->irq_level = irq;
4339
4340         /* get eeprom configuration information and command line settings etc */
4341         check_eeprom(&acb->eeprom, io_port);
4342         print_eeprom_settings(&acb->eeprom);
4343
4344         /* setup adapter control block */
4345         adapter_init_params(acb);
4346
4347         /* display card connectors/termination settings */
4348         adapter_print_config(acb);
4349
4350         if (adapter_sg_tables_alloc(acb)) {
4351                 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4352                 goto failed;
4353         }
4354         adapter_init_scsi_host(acb->scsi_host);
4355         adapter_init_chip(acb);
4356         set_basic_config(acb);
4357
4358         dprintkdbg(DBG_0,
4359                 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4360                 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4361                 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4362                 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4363         return 0;
4364
4365 failed:
4366         if (acb->irq_level)
4367                 free_irq(acb->irq_level, acb);
4368         if (acb->io_port_base)
4369                 release_region(acb->io_port_base, acb->io_port_len);
4370         adapter_sg_tables_free(acb);
4371
4372         return 1;
4373 }
4374
4375
4376 /**
4377  * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4378  * stopping all operations and disabling interrupt generation on the
4379  * card.
4380  *
4381  * @acb: The adapter which we are to shutdown.
4382  **/
4383 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4384 {
4385         /* disable interrupts */
4386         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4387         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4388
4389         /* reset the scsi bus */
4390         if (acb->config & HCC_SCSI_RESET)
4391                 reset_scsi_bus(acb);
4392
4393         /* clear any pending interrupt state */
4394         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4395 }
4396
4397
4398
4399 /**
4400  * adapter_uninit - Shut down the chip and release any resources that
4401  * we had allocated. Once this returns the adapter should not be used
4402  * anymore.
4403  *
4404  * @acb: The adapter which we are to un-initialize.
4405  **/
4406 static void adapter_uninit(struct AdapterCtlBlk *acb)
4407 {
4408         unsigned long flags;
4409         DC395x_LOCK_IO(acb->scsi_host, flags);
4410
4411         /* remove timers */
4412         if (timer_pending(&acb->waiting_timer))
4413                 del_timer(&acb->waiting_timer);
4414         if (timer_pending(&acb->selto_timer))
4415                 del_timer(&acb->selto_timer);
4416
4417         adapter_uninit_chip(acb);
4418         adapter_remove_and_free_all_devices(acb);
4419         DC395x_UNLOCK_IO(acb->scsi_host, flags);
4420
4421         if (acb->irq_level)
4422                 free_irq(acb->irq_level, acb);
4423         if (acb->io_port_base)
4424                 release_region(acb->io_port_base, acb->io_port_len);
4425
4426         adapter_sg_tables_free(acb);
4427 }
4428
4429
4430 #undef YESNO
4431 #define YESNO(YN) \
4432  if (YN) seq_printf(m, " Yes ");\
4433  else seq_printf(m, " No  ")
4434
4435 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4436 {
4437         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4438         int spd, spd1;
4439         struct DeviceCtlBlk *dcb;
4440         unsigned long flags;
4441         int dev;
4442
4443         seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4444                 " Driver Version " DC395X_VERSION "\n");
4445
4446         DC395x_LOCK_IO(acb->scsi_host, flags);
4447
4448         seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4449         seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4450                 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4451         seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4452         seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4453         seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4454
4455         seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4456         seq_printf(m, "AdapterID %i\n", host->this_id);
4457
4458         seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4459         /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4460         seq_printf(m, ", FilterCfg 0x%02x",
4461                 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4462         seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4463         /*seq_printf(m, "\n"); */
4464
4465         seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4466         seq_printf(m, "Map of attached LUNs: %8ph\n", &acb->dcb_map[0]);
4467         seq_printf(m, "                      %8ph\n", &acb->dcb_map[8]);
4468
4469         seq_puts(m,
4470                  "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4471
4472         dev = 0;
4473         list_for_each_entry(dcb, &acb->dcb_list, list) {
4474                 int nego_period;
4475                 seq_printf(m, "%02i %02i  %02i ", dev, dcb->target_id,
4476                         dcb->target_lun);
4477                 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4478                 YESNO(dcb->sync_offset);
4479                 YESNO(dcb->sync_period & WIDE_SYNC);
4480                 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4481                 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4482                 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4483                 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4484                 if (dcb->sync_offset)
4485                         seq_printf(m, "  %03i ns ", nego_period);
4486                 else
4487                         seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4488
4489                 if (dcb->sync_offset & 0x0f) {
4490                         spd = 1000 / (nego_period);
4491                         spd1 = 1000 % (nego_period);
4492                         spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4493                         seq_printf(m, "   %2i.%1i M     %02i ", spd, spd1,
4494                                 (dcb->sync_offset & 0x0f));
4495                 } else
4496                         seq_puts(m, "                 ");
4497
4498                 /* Add more info ... */
4499                 seq_printf(m, "     %02i\n", dcb->max_command);
4500                 dev++;
4501         }
4502
4503         if (timer_pending(&acb->waiting_timer))
4504                 seq_puts(m, "Waiting queue timer running\n");
4505         else
4506                 seq_putc(m, '\n');
4507
4508         list_for_each_entry(dcb, &acb->dcb_list, list) {
4509                 struct ScsiReqBlk *srb;
4510                 if (!list_empty(&dcb->srb_waiting_list))
4511                         seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4512                                 dcb->target_id, dcb->target_lun,
4513                                 list_size(&dcb->srb_waiting_list));
4514                 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4515                         seq_printf(m, " %p", srb->cmd);
4516                 if (!list_empty(&dcb->srb_going_list))
4517                         seq_printf(m, "\nDCB (%02i-%i): Going  : %i:",
4518                                 dcb->target_id, dcb->target_lun,
4519                                 list_size(&dcb->srb_going_list));
4520                 list_for_each_entry(srb, &dcb->srb_going_list, list)
4521                         seq_printf(m, " %p", srb->cmd);
4522                 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4523                         seq_putc(m, '\n');
4524         }
4525
4526         if (debug_enabled(DBG_1)) {
4527                 seq_printf(m, "DCB list for ACB %p:\n", acb);
4528                 list_for_each_entry(dcb, &acb->dcb_list, list) {
4529                         seq_printf(m, "%p -> ", dcb);
4530                 }
4531                 seq_puts(m, "END\n");
4532         }
4533
4534         DC395x_UNLOCK_IO(acb->scsi_host, flags);
4535         return 0;
4536 }
4537
4538
4539 static struct scsi_host_template dc395x_driver_template = {
4540         .module                 = THIS_MODULE,
4541         .proc_name              = DC395X_NAME,
4542         .show_info              = dc395x_show_info,
4543         .name                   = DC395X_BANNER " " DC395X_VERSION,
4544         .queuecommand           = dc395x_queue_command,
4545         .slave_alloc            = dc395x_slave_alloc,
4546         .slave_destroy          = dc395x_slave_destroy,
4547         .can_queue              = DC395x_MAX_CAN_QUEUE,
4548         .this_id                = 7,
4549         .sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
4550         .cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
4551         .eh_abort_handler       = dc395x_eh_abort,
4552         .eh_bus_reset_handler   = dc395x_eh_bus_reset,
4553         .dma_boundary           = PAGE_SIZE - 1,
4554 };
4555
4556
4557 /**
4558  * banner_display - Display banner on first instance of driver
4559  * initialized.
4560  **/
4561 static void banner_display(void)
4562 {
4563         static int banner_done = 0;
4564         if (!banner_done)
4565         {
4566                 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4567                 banner_done = 1;
4568         }
4569 }
4570
4571
4572 /**
4573  * dc395x_init_one - Initialise a single instance of the adapter.
4574  *
4575  * The PCI layer will call this once for each instance of the adapter
4576  * that it finds in the system. The pci_dev strcuture indicates which
4577  * instance we are being called from.
4578  *
4579  * @dev: The PCI device to initialize.
4580  * @id: Looks like a pointer to the entry in our pci device table
4581  * that was actually matched by the PCI subsystem.
4582  *
4583  * Returns 0 on success, or an error code (-ve) on failure.
4584  **/
4585 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4586 {
4587         struct Scsi_Host *scsi_host = NULL;
4588         struct AdapterCtlBlk *acb = NULL;
4589         unsigned long io_port_base;
4590         unsigned int io_port_len;
4591         unsigned int irq;
4592
4593         dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4594         banner_display();
4595
4596         if (pci_enable_device(dev))
4597         {
4598                 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4599                 return -ENODEV;
4600         }
4601         io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4602         io_port_len = pci_resource_len(dev, 0);
4603         irq = dev->irq;
4604         dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4605
4606         /* allocate scsi host information (includes out adapter) */
4607         scsi_host = scsi_host_alloc(&dc395x_driver_template,
4608                                     sizeof(struct AdapterCtlBlk));
4609         if (!scsi_host) {
4610                 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4611                 goto fail;
4612         }
4613         acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4614         acb->scsi_host = scsi_host;
4615         acb->dev = dev;
4616
4617         /* initialise the adapter and everything we need */
4618         if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4619                 dprintkl(KERN_INFO, "adapter init failed\n");
4620                 acb = NULL;
4621                 goto fail;
4622         }
4623
4624         pci_set_master(dev);
4625
4626         /* get the scsi mid level to scan for new devices on the bus */
4627         if (scsi_add_host(scsi_host, &dev->dev)) {
4628                 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4629                 goto fail;
4630         }
4631         pci_set_drvdata(dev, scsi_host);
4632         scsi_scan_host(scsi_host);
4633
4634         return 0;
4635
4636 fail:
4637         if (acb != NULL)
4638                 adapter_uninit(acb);
4639         if (scsi_host != NULL)
4640                 scsi_host_put(scsi_host);
4641         pci_disable_device(dev);
4642         return -ENODEV;
4643 }
4644
4645
4646 /**
4647  * dc395x_remove_one - Called to remove a single instance of the
4648  * adapter.
4649  *
4650  * @dev: The PCI device to initialize.
4651  **/
4652 static void dc395x_remove_one(struct pci_dev *dev)
4653 {
4654         struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4655         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4656
4657         dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4658
4659         scsi_remove_host(scsi_host);
4660         adapter_uninit(acb);
4661         pci_disable_device(dev);
4662         scsi_host_put(scsi_host);
4663 }
4664
4665
4666 static struct pci_device_id dc395x_pci_table[] = {
4667         {
4668                 .vendor         = PCI_VENDOR_ID_TEKRAM,
4669                 .device         = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4670                 .subvendor      = PCI_ANY_ID,
4671                 .subdevice      = PCI_ANY_ID,
4672          },
4673         {}                      /* Terminating entry */
4674 };
4675 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4676
4677
4678 static struct pci_driver dc395x_driver = {
4679         .name           = DC395X_NAME,
4680         .id_table       = dc395x_pci_table,
4681         .probe          = dc395x_init_one,
4682         .remove         = dc395x_remove_one,
4683 };
4684 module_pci_driver(dc395x_driver);
4685
4686 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4687 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4688 MODULE_LICENSE("GPL");