drivers/scsi/myrb.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Linux Driver for Mylex DAC960/AcceleRAID/eXtremeRAID PCI RAID Controllers
   4  *
   5  * Copyright 2017 Hannes Reinecke, SUSE Linux GmbH <hare@suse.com>
   6  *
   7  * Based on the original DAC960 driver,
   8  * Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com>
   9  * Portions Copyright 2002 by Mylex (An IBM Business Unit)
  10  *
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/types.h>
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/pci.h>
  18 #include <linux/raid_class.h>
  19 #include <asm/unaligned.h>
  20 #include <scsi/scsi.h>
  21 #include <scsi/scsi_host.h>
  22 #include <scsi/scsi_device.h>
  23 #include <scsi/scsi_cmnd.h>
  24 #include <scsi/scsi_tcq.h>
  25 #include "myrb.h"
  26
  27 static struct raid_template *myrb_raid_template;
  28
  29 static void myrb_monitor(struct work_struct *work);
  30 static inline void myrb_translate_devstate(void *DeviceState);
  31
  32 static inline int myrb_logical_channel(struct Scsi_Host *shost)
  33 {
  34         return shost->max_channel - 1;
  35 }
  36
  37 static struct myrb_devstate_name_entry {
  38         enum myrb_devstate state;
  39         const char *name;
  40 } myrb_devstate_name_list[] = {
  41         { MYRB_DEVICE_DEAD, "Dead" },
  42         { MYRB_DEVICE_WO, "WriteOnly" },
  43         { MYRB_DEVICE_ONLINE, "Online" },
  44         { MYRB_DEVICE_CRITICAL, "Critical" },
  45         { MYRB_DEVICE_STANDBY, "Standby" },
  46         { MYRB_DEVICE_OFFLINE, "Offline" },
  47 };
  48
  49 static const char *myrb_devstate_name(enum myrb_devstate state)
  50 {
  51         struct myrb_devstate_name_entry *entry = myrb_devstate_name_list;
  52         int i;
  53
  54         for (i = 0; i < ARRAY_SIZE(myrb_devstate_name_list); i++) {
  55                 if (entry[i].state == state)
  56                         return entry[i].name;
  57         }
  58         return "Unknown";
  59 }
  60
  61 static struct myrb_raidlevel_name_entry {
  62         enum myrb_raidlevel level;
  63         const char *name;
  64 } myrb_raidlevel_name_list[] = {
  65         { MYRB_RAID_LEVEL0, "RAID0" },
  66         { MYRB_RAID_LEVEL1, "RAID1" },
  67         { MYRB_RAID_LEVEL3, "RAID3" },
  68         { MYRB_RAID_LEVEL5, "RAID5" },
  69         { MYRB_RAID_LEVEL6, "RAID6" },
  70         { MYRB_RAID_JBOD, "JBOD" },
  71 };
  72
  73 static const char *myrb_raidlevel_name(enum myrb_raidlevel level)
  74 {
  75         struct myrb_raidlevel_name_entry *entry = myrb_raidlevel_name_list;
  76         int i;
  77
  78         for (i = 0; i < ARRAY_SIZE(myrb_raidlevel_name_list); i++) {
  79                 if (entry[i].level == level)
  80                         return entry[i].name;
  81         }
  82         return NULL;
  83 }
  84
  85 /**
  86  * myrb_create_mempools - allocates auxiliary data structures
  87  *
  88  * Return: true on success, false otherwise.
  89  */
  90 static bool myrb_create_mempools(struct pci_dev *pdev, struct myrb_hba *cb)
  91 {
  92         size_t elem_size, elem_align;
  93
  94         elem_align = sizeof(struct myrb_sge);
  95         elem_size = cb->host->sg_tablesize * elem_align;
  96         cb->sg_pool = dma_pool_create("myrb_sg", &pdev->dev,
  97                                       elem_size, elem_align, 0);
  98         if (cb->sg_pool == NULL) {
  99                 shost_printk(KERN_ERR, cb->host,
 100                              "Failed to allocate SG pool\n");
 101                 return false;
 102         }
 103
 104         cb->dcdb_pool = dma_pool_create("myrb_dcdb", &pdev->dev,
 105                                        sizeof(struct myrb_dcdb),
 106                                        sizeof(unsigned int), 0);
 107         if (!cb->dcdb_pool) {
 108                 dma_pool_destroy(cb->sg_pool);
 109                 cb->sg_pool = NULL;
 110                 shost_printk(KERN_ERR, cb->host,
 111                              "Failed to allocate DCDB pool\n");
 112                 return false;
 113         }
 114
 115         snprintf(cb->work_q_name, sizeof(cb->work_q_name),
 116                  "myrb_wq_%d", cb->host->host_no);
 117         cb->work_q = create_singlethread_workqueue(cb->work_q_name);
 118         if (!cb->work_q) {
 119                 dma_pool_destroy(cb->dcdb_pool);
 120                 cb->dcdb_pool = NULL;
 121                 dma_pool_destroy(cb->sg_pool);
 122                 cb->sg_pool = NULL;
 123                 shost_printk(KERN_ERR, cb->host,
 124                              "Failed to create workqueue\n");
 125                 return false;
 126         }
 127
 128         /*
 129          * Initialize the Monitoring Timer.
 130          */
 131         INIT_DELAYED_WORK(&cb->monitor_work, myrb_monitor);
 132         queue_delayed_work(cb->work_q, &cb->monitor_work, 1);
 133
 134         return true;
 135 }
 136
 137 /**
 138  * myrb_destroy_mempools - tears down the memory pools for the controller
 139  */
 140 static void myrb_destroy_mempools(struct myrb_hba *cb)
 141 {
 142         cancel_delayed_work_sync(&cb->monitor_work);
 143         destroy_workqueue(cb->work_q);
 144
 145         dma_pool_destroy(cb->sg_pool);
 146         dma_pool_destroy(cb->dcdb_pool);
 147 }
 148
 149 /**
 150  * myrb_reset_cmd - reset command block
 151  */
 152 static inline void myrb_reset_cmd(struct myrb_cmdblk *cmd_blk)
 153 {
 154         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
 155
 156         memset(mbox, 0, sizeof(union myrb_cmd_mbox));
 157         cmd_blk->status = 0;
 158 }
 159
 160 /**
 161  * myrb_qcmd - queues command block for execution
 162  */
 163 static void myrb_qcmd(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk)
 164 {
 165         void __iomem *base = cb->io_base;
 166         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
 167         union myrb_cmd_mbox *next_mbox = cb->next_cmd_mbox;
 168
 169         cb->write_cmd_mbox(next_mbox, mbox);
 170         if (cb->prev_cmd_mbox1->words[0] == 0 ||
 171             cb->prev_cmd_mbox2->words[0] == 0)
 172                 cb->get_cmd_mbox(base);
 173         cb->prev_cmd_mbox2 = cb->prev_cmd_mbox1;
 174         cb->prev_cmd_mbox1 = next_mbox;
 175         if (++next_mbox > cb->last_cmd_mbox)
 176                 next_mbox = cb->first_cmd_mbox;
 177         cb->next_cmd_mbox = next_mbox;
 178 }
 179
 180 /**
 181  * myrb_exec_cmd - executes command block and waits for completion.
 182  *
 183  * Return: command status
 184  */
 185 static unsigned short myrb_exec_cmd(struct myrb_hba *cb,
 186                 struct myrb_cmdblk *cmd_blk)
 187 {
 188         DECLARE_COMPLETION_ONSTACK(cmpl);
 189         unsigned long flags;
 190
 191         cmd_blk->completion = &cmpl;
 192
 193         spin_lock_irqsave(&cb->queue_lock, flags);
 194         cb->qcmd(cb, cmd_blk);
 195         spin_unlock_irqrestore(&cb->queue_lock, flags);
 196
 197         WARN_ON(in_interrupt());
 198         wait_for_completion(&cmpl);
 199         return cmd_blk->status;
 200 }
 201
 202 /**
 203  * myrb_exec_type3 - executes a type 3 command and waits for completion.
 204  *
 205  * Return: command status
 206  */
 207 static unsigned short myrb_exec_type3(struct myrb_hba *cb,
 208                 enum myrb_cmd_opcode op, dma_addr_t addr)
 209 {
 210         struct myrb_cmdblk *cmd_blk = &cb->dcmd_blk;
 211         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
 212         unsigned short status;
 213
 214         mutex_lock(&cb->dcmd_mutex);
 215         myrb_reset_cmd(cmd_blk);
 216         mbox->type3.id = MYRB_DCMD_TAG;
 217         mbox->type3.opcode = op;
 218         mbox->type3.addr = addr;
 219         status = myrb_exec_cmd(cb, cmd_blk);
 220         mutex_unlock(&cb->dcmd_mutex);
 221         return status;
 222 }
 223
 224 /**
 225  * myrb_exec_type3D - executes a type 3D command and waits for completion.
 226  *
 227  * Return: command status
 228  */
 229 static unsigned short myrb_exec_type3D(struct myrb_hba *cb,
 230                 enum myrb_cmd_opcode op, struct scsi_device *sdev,
 231                 struct myrb_pdev_state *pdev_info)
 232 {
 233         struct myrb_cmdblk *cmd_blk = &cb->dcmd_blk;
 234         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
 235         unsigned short status;
 236         dma_addr_t pdev_info_addr;
 237
 238         pdev_info_addr = dma_map_single(&cb->pdev->dev, pdev_info,
 239                                         sizeof(struct myrb_pdev_state),
 240                                         DMA_FROM_DEVICE);
 241         if (dma_mapping_error(&cb->pdev->dev, pdev_info_addr))
 242                 return MYRB_STATUS_SUBSYS_FAILED;
 243
 244         mutex_lock(&cb->dcmd_mutex);
 245         myrb_reset_cmd(cmd_blk);
 246         mbox->type3D.id = MYRB_DCMD_TAG;
 247         mbox->type3D.opcode = op;
 248         mbox->type3D.channel = sdev->channel;
 249         mbox->type3D.target = sdev->id;
 250         mbox->type3D.addr = pdev_info_addr;
 251         status = myrb_exec_cmd(cb, cmd_blk);
 252         mutex_unlock(&cb->dcmd_mutex);
 253         dma_unmap_single(&cb->pdev->dev, pdev_info_addr,
 254                          sizeof(struct myrb_pdev_state), DMA_FROM_DEVICE);
 255         if (status == MYRB_STATUS_SUCCESS &&
 256             mbox->type3D.opcode == MYRB_CMD_GET_DEVICE_STATE_OLD)
 257                 myrb_translate_devstate(pdev_info);
 258
 259         return status;
 260 }
 261
 262 static char *myrb_event_msg[] = {
 263         "killed because write recovery failed",
 264         "killed because of SCSI bus reset failure",
 265         "killed because of double check condition",
 266         "killed because it was removed",
 267         "killed because of gross error on SCSI chip",
 268         "killed because of bad tag returned from drive",
 269         "killed because of timeout on SCSI command",
 270         "killed because of reset SCSI command issued from system",
 271         "killed because busy or parity error count exceeded limit",
 272         "killed because of 'kill drive' command from system",
 273         "killed because of selection timeout",
 274         "killed due to SCSI phase sequence error",
 275         "killed due to unknown status",
 276 };
 277
 278 /**
 279  * myrb_get_event - get event log from HBA
 280  * @cb: pointer to the hba structure
 281  * @event: number of the event
 282  *
 283  * Execute a type 3E command and logs the event message
 284  */
 285 static void myrb_get_event(struct myrb_hba *cb, unsigned int event)
 286 {
 287         struct myrb_cmdblk *cmd_blk = &cb->mcmd_blk;
 288         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
 289         struct myrb_log_entry *ev_buf;
 290         dma_addr_t ev_addr;
 291         unsigned short status;
 292
 293         ev_buf = dma_alloc_coherent(&cb->pdev->dev,
 294                                     sizeof(struct myrb_log_entry),
 295                                     &ev_addr, GFP_KERNEL);
 296         if (!ev_buf)
 297                 return;
 298
 299         myrb_reset_cmd(cmd_blk);
 300         mbox->type3E.id = MYRB_MCMD_TAG;
 301         mbox->type3E.opcode = MYRB_CMD_EVENT_LOG_OPERATION;
 302         mbox->type3E.optype = DAC960_V1_GetEventLogEntry;
 303         mbox->type3E.opqual = 1;
 304         mbox->type3E.ev_seq = event;
 305         mbox->type3E.addr = ev_addr;
 306         status = myrb_exec_cmd(cb, cmd_blk);
 307         if (status != MYRB_STATUS_SUCCESS)
 308                 shost_printk(KERN_INFO, cb->host,
 309                              "Failed to get event log %d, status %04x\n",
 310                              event, status);
 311
 312         else if (ev_buf->seq_num == event) {
 313                 struct scsi_sense_hdr sshdr;
 314
 315                 memset(&sshdr, 0, sizeof(sshdr));
 316                 scsi_normalize_sense(ev_buf->sense, 32, &sshdr);
 317
 318                 if (sshdr.sense_key == VENDOR_SPECIFIC &&
 319                     sshdr.asc == 0x80 &&
 320                     sshdr.ascq < ARRAY_SIZE(myrb_event_msg))
 321                         shost_printk(KERN_CRIT, cb->host,
 322                                      "Physical drive %d:%d: %s\n",
 323                                      ev_buf->channel, ev_buf->target,
 324                                      myrb_event_msg[sshdr.ascq]);
 325                 else
 326                         shost_printk(KERN_CRIT, cb->host,
 327                                      "Physical drive %d:%d: Sense: %X/%02X/%02X\n",
 328                                      ev_buf->channel, ev_buf->target,
 329                                      sshdr.sense_key, sshdr.asc, sshdr.ascq);
 330         }
 331
 332         dma_free_coherent(&cb->pdev->dev, sizeof(struct myrb_log_entry),
 333                           ev_buf, ev_addr);
 334 }
 335
 336 /**
 337  * myrb_get_errtable - retrieves the error table from the controller
 338  *
 339  * Executes a type 3 command and logs the error table from the controller.
 340  */
 341 static void myrb_get_errtable(struct myrb_hba *cb)
 342 {
 343         struct myrb_cmdblk *cmd_blk = &cb->mcmd_blk;
 344         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
 345         unsigned short status;
 346         struct myrb_error_entry old_table[MYRB_MAX_CHANNELS * MYRB_MAX_TARGETS];
 347
 348         memcpy(&old_table, cb->err_table, sizeof(old_table));
 349
 350         myrb_reset_cmd(cmd_blk);
 351         mbox->type3.id = MYRB_MCMD_TAG;
 352         mbox->type3.opcode = MYRB_CMD_GET_ERROR_TABLE;
 353         mbox->type3.addr = cb->err_table_addr;
 354         status = myrb_exec_cmd(cb, cmd_blk);
 355         if (status == MYRB_STATUS_SUCCESS) {
 356                 struct myrb_error_entry *table = cb->err_table;
 357                 struct myrb_error_entry *new, *old;
 358                 size_t err_table_offset;
 359                 struct scsi_device *sdev;
 360
 361                 shost_for_each_device(sdev, cb->host) {
 362                         if (sdev->channel >= myrb_logical_channel(cb->host))
 363                                 continue;
 364                         err_table_offset = sdev->channel * MYRB_MAX_TARGETS
 365                                 + sdev->id;
 366                         new = table + err_table_offset;
 367                         old = &old_table[err_table_offset];
 368                         if (new->parity_err == old->parity_err &&
 369                             new->soft_err == old->soft_err &&
 370                             new->hard_err == old->hard_err &&
 371                             new->misc_err == old->misc_err)
 372                                 continue;
 373                         sdev_printk(KERN_CRIT, sdev,
 374                                     "Errors: Parity = %d, Soft = %d, Hard = %d, Misc = %d\n",
 375                                     new->parity_err, new->soft_err,
 376                                     new->hard_err, new->misc_err);
 377                 }
 378         }
 379 }
 380
 381 /**
 382  * myrb_get_ldev_info - retrieves the logical device table from the controller
 383  *
 384  * Executes a type 3 command and updates the logical device table.
 385  *
 386  * Return: command status
 387  */
 388 static unsigned short myrb_get_ldev_info(struct myrb_hba *cb)
 389 {
 390         unsigned short status;
 391         int ldev_num, ldev_cnt = cb->enquiry->ldev_count;
 392         struct Scsi_Host *shost = cb->host;
 393
 394         status = myrb_exec_type3(cb, MYRB_CMD_GET_LDEV_INFO,
 395                                  cb->ldev_info_addr);
 396         if (status != MYRB_STATUS_SUCCESS)
 397                 return status;
 398
 399         for (ldev_num = 0; ldev_num < ldev_cnt; ldev_num++) {
 400                 struct myrb_ldev_info *old = NULL;
 401                 struct myrb_ldev_info *new = cb->ldev_info_buf + ldev_num;
 402                 struct scsi_device *sdev;
 403
 404                 sdev = scsi_device_lookup(shost, myrb_logical_channel(shost),
 405                                           ldev_num, 0);
 406                 if (!sdev) {
 407                         if (new->state == MYRB_DEVICE_OFFLINE)
 408                                 continue;
 409                         shost_printk(KERN_INFO, shost,
 410                                      "Adding Logical Drive %d in state %s\n",
 411                                      ldev_num, myrb_devstate_name(new->state));
 412                         scsi_add_device(shost, myrb_logical_channel(shost),
 413                                         ldev_num, 0);
 414                         continue;
 415                 }
 416                 old = sdev->hostdata;
 417                 if (new->state != old->state)
 418                         shost_printk(KERN_INFO, shost,
 419                                      "Logical Drive %d is now %s\n",
 420                                      ldev_num, myrb_devstate_name(new->state));
 421                 if (new->wb_enabled != old->wb_enabled)
 422                         sdev_printk(KERN_INFO, sdev,
 423                                     "Logical Drive is now WRITE %s\n",
 424                                     (new->wb_enabled ? "BACK" : "THRU"));
 425                 memcpy(old, new, sizeof(*new));
 426                 scsi_device_put(sdev);
 427         }
 428         return status;
 429 }
 430
 431 /**
 432  * myrb_get_rbld_progress - get rebuild progress information
 433  *
 434  * Executes a type 3 command and returns the rebuild progress
 435  * information.
 436  *
 437  * Return: command status
 438  */
 439 static unsigned short myrb_get_rbld_progress(struct myrb_hba *cb,
 440                 struct myrb_rbld_progress *rbld)
 441 {
 442         struct myrb_cmdblk *cmd_blk = &cb->mcmd_blk;
 443         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
 444         struct myrb_rbld_progress *rbld_buf;
 445         dma_addr_t rbld_addr;
 446         unsigned short status;
 447
 448         rbld_buf = dma_alloc_coherent(&cb->pdev->dev,
 449                                       sizeof(struct myrb_rbld_progress),
 450                                       &rbld_addr, GFP_KERNEL);
 451         if (!rbld_buf)
 452                 return MYRB_STATUS_RBLD_NOT_CHECKED;
 453
 454         myrb_reset_cmd(cmd_blk);
 455         mbox->type3.id = MYRB_MCMD_TAG;
 456         mbox->type3.opcode = MYRB_CMD_GET_REBUILD_PROGRESS;
 457         mbox->type3.addr = rbld_addr;
 458         status = myrb_exec_cmd(cb, cmd_blk);
 459         if (rbld)
 460                 memcpy(rbld, rbld_buf, sizeof(struct myrb_rbld_progress));
 461         dma_free_coherent(&cb->pdev->dev, sizeof(struct myrb_rbld_progress),
 462                           rbld_buf, rbld_addr);
 463         return status;
 464 }
 465
 466 /**
 467  * myrb_update_rbld_progress - updates the rebuild status
 468  *
 469  * Updates the rebuild status for the attached logical devices.
 470  *
 471  */
 472 static void myrb_update_rbld_progress(struct myrb_hba *cb)
 473 {
 474         struct myrb_rbld_progress rbld_buf;
 475         unsigned short status;
 476
 477         status = myrb_get_rbld_progress(cb, &rbld_buf);
 478         if (status == MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS &&
 479             cb->last_rbld_status == MYRB_STATUS_SUCCESS)
 480                 status = MYRB_STATUS_RBLD_SUCCESS;
 481         if (status != MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS) {
 482                 unsigned int blocks_done =
 483                         rbld_buf.ldev_size - rbld_buf.blocks_left;
 484                 struct scsi_device *sdev;
 485
 486                 sdev = scsi_device_lookup(cb->host,
 487                                           myrb_logical_channel(cb->host),
 488                                           rbld_buf.ldev_num, 0);
 489                 if (!sdev)
 490                         return;
 491
 492                 switch (status) {
 493                 case MYRB_STATUS_SUCCESS:
 494                         sdev_printk(KERN_INFO, sdev,
 495                                     "Rebuild in Progress, %d%% completed\n",
 496                                     (100 * (blocks_done >> 7))
 497                                     / (rbld_buf.ldev_size >> 7));
 498                         break;
 499                 case MYRB_STATUS_RBLD_FAILED_LDEV_FAILURE:
 500                         sdev_printk(KERN_INFO, sdev,
 501                                     "Rebuild Failed due to Logical Drive Failure\n");
 502                         break;
 503                 case MYRB_STATUS_RBLD_FAILED_BADBLOCKS:
 504                         sdev_printk(KERN_INFO, sdev,
 505                                     "Rebuild Failed due to Bad Blocks on Other Drives\n");
 506                         break;
 507                 case MYRB_STATUS_RBLD_FAILED_NEW_DRIVE_FAILED:
 508                         sdev_printk(KERN_INFO, sdev,
 509                                     "Rebuild Failed due to Failure of Drive Being Rebuilt\n");
 510                         break;
 511                 case MYRB_STATUS_RBLD_SUCCESS:
 512                         sdev_printk(KERN_INFO, sdev,
 513                                     "Rebuild Completed Successfully\n");
 514                         break;
 515                 case MYRB_STATUS_RBLD_SUCCESS_TERMINATED:
 516                         sdev_printk(KERN_INFO, sdev,
 517                                      "Rebuild Successfully Terminated\n");
 518                         break;
 519                 default:
 520                         break;
 521                 }
 522                 scsi_device_put(sdev);
 523         }
 524         cb->last_rbld_status = status;
 525 }
 526
 527 /**
 528  * myrb_get_cc_progress - retrieve the rebuild status
 529  *
 530  * Execute a type 3 Command and fetch the rebuild / consistency check
 531  * status.
 532  */
 533 static void myrb_get_cc_progress(struct myrb_hba *cb)
 534 {
 535         struct myrb_cmdblk *cmd_blk = &cb->mcmd_blk;
 536         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
 537         struct myrb_rbld_progress *rbld_buf;
 538         dma_addr_t rbld_addr;
 539         unsigned short status;
 540
 541         rbld_buf = dma_alloc_coherent(&cb->pdev->dev,
 542                                       sizeof(struct myrb_rbld_progress),
 543                                       &rbld_addr, GFP_KERNEL);
 544         if (!rbld_buf) {
 545                 cb->need_cc_status = true;
 546                 return;
 547         }
 548         myrb_reset_cmd(cmd_blk);
 549         mbox->type3.id = MYRB_MCMD_TAG;
 550         mbox->type3.opcode = MYRB_CMD_REBUILD_STAT;
 551         mbox->type3.addr = rbld_addr;
 552         status = myrb_exec_cmd(cb, cmd_blk);
 553         if (status == MYRB_STATUS_SUCCESS) {
 554                 unsigned int ldev_num = rbld_buf->ldev_num;
 555                 unsigned int ldev_size = rbld_buf->ldev_size;
 556                 unsigned int blocks_done =
 557                         ldev_size - rbld_buf->blocks_left;
 558                 struct scsi_device *sdev;
 559
 560                 sdev = scsi_device_lookup(cb->host,
 561                                           myrb_logical_channel(cb->host),
 562                                           ldev_num, 0);
 563                 if (sdev) {
 564                         sdev_printk(KERN_INFO, sdev,
 565                                     "Consistency Check in Progress: %d%% completed\n",
 566                                     (100 * (blocks_done >> 7))
 567                                     / (ldev_size >> 7));
 568                         scsi_device_put(sdev);
 569                 }
 570         }
 571         dma_free_coherent(&cb->pdev->dev, sizeof(struct myrb_rbld_progress),
 572                           rbld_buf, rbld_addr);
 573 }
 574
 575 /**
 576  * myrb_bgi_control - updates background initialisation status
 577  *
 578  * Executes a type 3B command and updates the background initialisation status
 579  */
 580 static void myrb_bgi_control(struct myrb_hba *cb)
 581 {
 582         struct myrb_cmdblk *cmd_blk = &cb->mcmd_blk;
 583         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
 584         struct myrb_bgi_status *bgi, *last_bgi;
 585         dma_addr_t bgi_addr;
 586         struct scsi_device *sdev = NULL;
 587         unsigned short status;
 588
 589         bgi = dma_alloc_coherent(&cb->pdev->dev, sizeof(struct myrb_bgi_status),
 590                                  &bgi_addr, GFP_KERNEL);
 591         if (!bgi) {
 592                 shost_printk(KERN_ERR, cb->host,
 593                              "Failed to allocate bgi memory\n");
 594                 return;
 595         }
 596         myrb_reset_cmd(cmd_blk);
 597         mbox->type3B.id = MYRB_DCMD_TAG;
 598         mbox->type3B.opcode = MYRB_CMD_BGI_CONTROL;
 599         mbox->type3B.optype = 0x20;
 600         mbox->type3B.addr = bgi_addr;
 601         status = myrb_exec_cmd(cb, cmd_blk);
 602         last_bgi = &cb->bgi_status;
 603         sdev = scsi_device_lookup(cb->host,
 604                                   myrb_logical_channel(cb->host),
 605                                   bgi->ldev_num, 0);
 606         switch (status) {
 607         case MYRB_STATUS_SUCCESS:
 608                 switch (bgi->status) {
 609                 case MYRB_BGI_INVALID:
 610                         break;
 611                 case MYRB_BGI_STARTED:
 612                         if (!sdev)
 613                                 break;
 614                         sdev_printk(KERN_INFO, sdev,
 615                                     "Background Initialization Started\n");
 616                         break;
 617                 case MYRB_BGI_INPROGRESS:
 618                         if (!sdev)
 619                                 break;
 620                         if (bgi->blocks_done == last_bgi->blocks_done &&
 621                             bgi->ldev_num == last_bgi->ldev_num)
 622                                 break;
 623                         sdev_printk(KERN_INFO, sdev,
 624                                  "Background Initialization in Progress: %d%% completed\n",
 625                                  (100 * (bgi->blocks_done >> 7))
 626                                  / (bgi->ldev_size >> 7));
 627                         break;
 628                 case MYRB_BGI_SUSPENDED:
 629                         if (!sdev)
 630                                 break;
 631                         sdev_printk(KERN_INFO, sdev,
 632                                     "Background Initialization Suspended\n");
 633                         break;
 634                 case MYRB_BGI_CANCELLED:
 635                         if (!sdev)
 636                                 break;
 637                         sdev_printk(KERN_INFO, sdev,
 638                                     "Background Initialization Cancelled\n");
 639                         break;
 640                 }
 641                 memcpy(&cb->bgi_status, bgi, sizeof(struct myrb_bgi_status));
 642                 break;
 643         case MYRB_STATUS_BGI_SUCCESS:
 644                 if (sdev && cb->bgi_status.status == MYRB_BGI_INPROGRESS)
 645                         sdev_printk(KERN_INFO, sdev,
 646                                     "Background Initialization Completed Successfully\n");
 647                 cb->bgi_status.status = MYRB_BGI_INVALID;
 648                 break;
 649         case MYRB_STATUS_BGI_ABORTED:
 650                 if (sdev && cb->bgi_status.status == MYRB_BGI_INPROGRESS)
 651                         sdev_printk(KERN_INFO, sdev,
 652                                     "Background Initialization Aborted\n");
 653                 /* Fallthrough */
 654         case MYRB_STATUS_NO_BGI_INPROGRESS:
 655                 cb->bgi_status.status = MYRB_BGI_INVALID;
 656                 break;
 657         }
 658         if (sdev)
 659                 scsi_device_put(sdev);
 660         dma_free_coherent(&cb->pdev->dev, sizeof(struct myrb_bgi_status),
 661                           bgi, bgi_addr);
 662 }
 663
 664 /**
 665  * myrb_hba_enquiry - updates the controller status
 666  *
 667  * Executes a DAC_V1_Enquiry command and updates the controller status.
 668  *
 669  * Return: command status
 670  */
 671 static unsigned short myrb_hba_enquiry(struct myrb_hba *cb)
 672 {
 673         struct myrb_enquiry old, *new;
 674         unsigned short status;
 675
 676         memcpy(&old, cb->enquiry, sizeof(struct myrb_enquiry));
 677
 678         status = myrb_exec_type3(cb, MYRB_CMD_ENQUIRY, cb->enquiry_addr);
 679         if (status != MYRB_STATUS_SUCCESS)
 680                 return status;
 681
 682         new = cb->enquiry;
 683         if (new->ldev_count > old.ldev_count) {
 684                 int ldev_num = old.ldev_count - 1;
 685
 686                 while (++ldev_num < new->ldev_count)
 687                         shost_printk(KERN_CRIT, cb->host,
 688                                      "Logical Drive %d Now Exists\n",
 689                                      ldev_num);
 690         }
 691         if (new->ldev_count < old.ldev_count) {
 692                 int ldev_num = new->ldev_count - 1;
 693
 694                 while (++ldev_num < old.ldev_count)
 695                         shost_printk(KERN_CRIT, cb->host,
 696                                      "Logical Drive %d No Longer Exists\n",
 697                                      ldev_num);
 698         }
 699         if (new->status.deferred != old.status.deferred)
 700                 shost_printk(KERN_CRIT, cb->host,
 701                              "Deferred Write Error Flag is now %s\n",
 702                              (new->status.deferred ? "TRUE" : "FALSE"));
 703         if (new->ev_seq != old.ev_seq) {
 704                 cb->new_ev_seq = new->ev_seq;
 705                 cb->need_err_info = true;
 706                 shost_printk(KERN_INFO, cb->host,
 707                              "Event log %d/%d (%d/%d) available\n",
 708                              cb->old_ev_seq, cb->new_ev_seq,
 709                              old.ev_seq, new->ev_seq);
 710         }
 711         if ((new->ldev_critical > 0 &&
 712              new->ldev_critical != old.ldev_critical) ||
 713             (new->ldev_offline > 0 &&
 714              new->ldev_offline != old.ldev_offline) ||
 715             (new->ldev_count != old.ldev_count)) {
 716                 shost_printk(KERN_INFO, cb->host,
 717                              "Logical drive count changed (%d/%d/%d)\n",
 718                              new->ldev_critical,
 719                              new->ldev_offline,
 720                              new->ldev_count);
 721                 cb->need_ldev_info = true;
 722         }
 723         if (new->pdev_dead > 0 ||
 724             new->pdev_dead != old.pdev_dead ||
 725             time_after_eq(jiffies, cb->secondary_monitor_time
 726                           + MYRB_SECONDARY_MONITOR_INTERVAL)) {
 727                 cb->need_bgi_status = cb->bgi_status_supported;
 728                 cb->secondary_monitor_time = jiffies;
 729         }
 730         if (new->rbld == MYRB_STDBY_RBLD_IN_PROGRESS ||
 731             new->rbld == MYRB_BG_RBLD_IN_PROGRESS ||
 732             old.rbld == MYRB_STDBY_RBLD_IN_PROGRESS ||
 733             old.rbld == MYRB_BG_RBLD_IN_PROGRESS) {
 734                 cb->need_rbld = true;
 735                 cb->rbld_first = (new->ldev_critical < old.ldev_critical);
 736         }
 737         if (old.rbld == MYRB_BG_CHECK_IN_PROGRESS)
 738                 switch (new->rbld) {
 739                 case MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS:
 740                         shost_printk(KERN_INFO, cb->host,
 741                                      "Consistency Check Completed Successfully\n");
 742                         break;
 743                 case MYRB_STDBY_RBLD_IN_PROGRESS:
 744                 case MYRB_BG_RBLD_IN_PROGRESS:
 745                         break;
 746                 case MYRB_BG_CHECK_IN_PROGRESS:
 747                         cb->need_cc_status = true;
 748                         break;
 749                 case MYRB_STDBY_RBLD_COMPLETED_WITH_ERROR:
 750                         shost_printk(KERN_INFO, cb->host,
 751                                      "Consistency Check Completed with Error\n");
 752                         break;
 753                 case MYRB_BG_RBLD_OR_CHECK_FAILED_DRIVE_FAILED:
 754                         shost_printk(KERN_INFO, cb->host,
 755                                      "Consistency Check Failed - Physical Device Failed\n");
 756                         break;
 757                 case MYRB_BG_RBLD_OR_CHECK_FAILED_LDEV_FAILED:
 758                         shost_printk(KERN_INFO, cb->host,
 759                                      "Consistency Check Failed - Logical Drive Failed\n");
 760                         break;
 761                 case MYRB_BG_RBLD_OR_CHECK_FAILED_OTHER:
 762                         shost_printk(KERN_INFO, cb->host,
 763                                      "Consistency Check Failed - Other Causes\n");
 764                         break;
 765                 case MYRB_BG_RBLD_OR_CHECK_SUCCESS_TERMINATED:
 766                         shost_printk(KERN_INFO, cb->host,
 767                                      "Consistency Check Successfully Terminated\n");
 768                         break;
 769                 }
 770         else if (new->rbld == MYRB_BG_CHECK_IN_PROGRESS)
 771                 cb->need_cc_status = true;
 772
 773         return MYRB_STATUS_SUCCESS;
 774 }
 775
 776 /**
 777  * myrb_set_pdev_state - sets the device state for a physical device
 778  *
 779  * Return: command status
 780  */
 781 static unsigned short myrb_set_pdev_state(struct myrb_hba *cb,
 782                 struct scsi_device *sdev, enum myrb_devstate state)
 783 {
 784         struct myrb_cmdblk *cmd_blk = &cb->dcmd_blk;
 785         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
 786         unsigned short status;
 787
 788         mutex_lock(&cb->dcmd_mutex);
 789         mbox->type3D.opcode = MYRB_CMD_START_DEVICE;
 790         mbox->type3D.id = MYRB_DCMD_TAG;
 791         mbox->type3D.channel = sdev->channel;
 792         mbox->type3D.target = sdev->id;
 793         mbox->type3D.state = state & 0x1F;
 794         status = myrb_exec_cmd(cb, cmd_blk);
 795         mutex_unlock(&cb->dcmd_mutex);
 796
 797         return status;
 798 }
 799
 800 /**
 801  * myrb_enable_mmio - enables the Memory Mailbox Interface
 802  *
 803  * PD and P controller types have no memory mailbox, but still need the
 804  * other dma mapped memory.
 805  *
 806  * Return: true on success, false otherwise.
 807  */
 808 static bool myrb_enable_mmio(struct myrb_hba *cb, mbox_mmio_init_t mmio_init_fn)
 809 {
 810         void __iomem *base = cb->io_base;
 811         struct pci_dev *pdev = cb->pdev;
 812         size_t err_table_size;
 813         size_t ldev_info_size;
 814         union myrb_cmd_mbox *cmd_mbox_mem;
 815         struct myrb_stat_mbox *stat_mbox_mem;
 816         union myrb_cmd_mbox mbox;
 817         unsigned short status;
 818
 819         memset(&mbox, 0, sizeof(union myrb_cmd_mbox));
 820
 821         if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
 822                 dev_err(&pdev->dev, "DMA mask out of range\n");
 823                 return false;
 824         }
 825
 826         cb->enquiry = dma_alloc_coherent(&pdev->dev,
 827                                          sizeof(struct myrb_enquiry),
 828                                          &cb->enquiry_addr, GFP_KERNEL);
 829         if (!cb->enquiry)
 830                 return false;
 831
 832         err_table_size = sizeof(struct myrb_error_entry) *
 833                 MYRB_MAX_CHANNELS * MYRB_MAX_TARGETS;
 834         cb->err_table = dma_alloc_coherent(&pdev->dev, err_table_size,
 835                                            &cb->err_table_addr, GFP_KERNEL);
 836         if (!cb->err_table)
 837                 return false;
 838
 839         ldev_info_size = sizeof(struct myrb_ldev_info) * MYRB_MAX_LDEVS;
 840         cb->ldev_info_buf = dma_alloc_coherent(&pdev->dev, ldev_info_size,
 841                                                &cb->ldev_info_addr, GFP_KERNEL);
 842         if (!cb->ldev_info_buf)
 843                 return false;
 844
 845         /*
 846          * Skip mailbox initialisation for PD and P Controllers
 847          */
 848         if (!mmio_init_fn)
 849                 return true;
 850
 851         /* These are the base addresses for the command memory mailbox array */
 852         cb->cmd_mbox_size =  MYRB_CMD_MBOX_COUNT * sizeof(union myrb_cmd_mbox);
 853         cb->first_cmd_mbox = dma_alloc_coherent(&pdev->dev,
 854                                                 cb->cmd_mbox_size,
 855                                                 &cb->cmd_mbox_addr,
 856                                                 GFP_KERNEL);
 857         if (!cb->first_cmd_mbox)
 858                 return false;
 859
 860         cmd_mbox_mem = cb->first_cmd_mbox;
 861         cmd_mbox_mem += MYRB_CMD_MBOX_COUNT - 1;
 862         cb->last_cmd_mbox = cmd_mbox_mem;
 863         cb->next_cmd_mbox = cb->first_cmd_mbox;
 864         cb->prev_cmd_mbox1 = cb->last_cmd_mbox;
 865         cb->prev_cmd_mbox2 = cb->last_cmd_mbox - 1;
 866
 867         /* These are the base addresses for the status memory mailbox array */
 868         cb->stat_mbox_size = MYRB_STAT_MBOX_COUNT *
 869             sizeof(struct myrb_stat_mbox);
 870         cb->first_stat_mbox = dma_alloc_coherent(&pdev->dev,
 871                                                  cb->stat_mbox_size,
 872                                                  &cb->stat_mbox_addr,
 873                                                  GFP_KERNEL);
 874         if (!cb->first_stat_mbox)
 875                 return false;
 876
 877         stat_mbox_mem = cb->first_stat_mbox;
 878         stat_mbox_mem += MYRB_STAT_MBOX_COUNT - 1;
 879         cb->last_stat_mbox = stat_mbox_mem;
 880         cb->next_stat_mbox = cb->first_stat_mbox;
 881
 882         /* Enable the Memory Mailbox Interface. */
 883         cb->dual_mode_interface = true;
 884         mbox.typeX.opcode = 0x2B;
 885         mbox.typeX.id = 0;
 886         mbox.typeX.opcode2 = 0x14;
 887         mbox.typeX.cmd_mbox_addr = cb->cmd_mbox_addr;
 888         mbox.typeX.stat_mbox_addr = cb->stat_mbox_addr;
 889
 890         status = mmio_init_fn(pdev, base, &mbox);
 891         if (status != MYRB_STATUS_SUCCESS) {
 892                 cb->dual_mode_interface = false;
 893                 mbox.typeX.opcode2 = 0x10;
 894                 status = mmio_init_fn(pdev, base, &mbox);
 895                 if (status != MYRB_STATUS_SUCCESS) {
 896                         dev_err(&pdev->dev,
 897                                 "Failed to enable mailbox, statux %02X\n",
 898                                 status);
 899                         return false;
 900                 }
 901         }
 902         return true;
 903 }
 904
 905 /**
 906  * myrb_get_hba_config - reads the configuration information
 907  *
 908  * Reads the configuration information from the controller and
 909  * initializes the controller structure.
 910  *
 911  * Return: 0 on success, errno otherwise
 912  */
 913 static int myrb_get_hba_config(struct myrb_hba *cb)
 914 {
 915         struct myrb_enquiry2 *enquiry2;
 916         dma_addr_t enquiry2_addr;
 917         struct myrb_config2 *config2;
 918         dma_addr_t config2_addr;
 919         struct Scsi_Host *shost = cb->host;
 920         struct pci_dev *pdev = cb->pdev;
 921         int pchan_max = 0, pchan_cur = 0;
 922         unsigned short status;
 923         int ret = -ENODEV, memsize = 0;
 924
 925         enquiry2 = dma_alloc_coherent(&pdev->dev, sizeof(struct myrb_enquiry2),
 926                                       &enquiry2_addr, GFP_KERNEL);
 927         if (!enquiry2) {
 928                 shost_printk(KERN_ERR, cb->host,
 929                              "Failed to allocate V1 enquiry2 memory\n");
 930                 return -ENOMEM;
 931         }
 932         config2 = dma_alloc_coherent(&pdev->dev, sizeof(struct myrb_config2),
 933                                      &config2_addr, GFP_KERNEL);
 934         if (!config2) {
 935                 shost_printk(KERN_ERR, cb->host,
 936                              "Failed to allocate V1 config2 memory\n");
 937                 dma_free_coherent(&pdev->dev, sizeof(struct myrb_enquiry2),
 938                                   enquiry2, enquiry2_addr);
 939                 return -ENOMEM;
 940         }
 941         mutex_lock(&cb->dma_mutex);
 942         status = myrb_hba_enquiry(cb);
 943         mutex_unlock(&cb->dma_mutex);
 944         if (status != MYRB_STATUS_SUCCESS) {
 945                 shost_printk(KERN_WARNING, cb->host,
 946                              "Failed it issue V1 Enquiry\n");
 947                 goto out_free;
 948         }
 949
 950         status = myrb_exec_type3(cb, MYRB_CMD_ENQUIRY2, enquiry2_addr);
 951         if (status != MYRB_STATUS_SUCCESS) {
 952                 shost_printk(KERN_WARNING, cb->host,
 953                              "Failed to issue V1 Enquiry2\n");
 954                 goto out_free;
 955         }
 956
 957         status = myrb_exec_type3(cb, MYRB_CMD_READ_CONFIG2, config2_addr);
 958         if (status != MYRB_STATUS_SUCCESS) {
 959                 shost_printk(KERN_WARNING, cb->host,
 960                              "Failed to issue ReadConfig2\n");
 961                 goto out_free;
 962         }
 963
 964         status = myrb_get_ldev_info(cb);
 965         if (status != MYRB_STATUS_SUCCESS) {
 966                 shost_printk(KERN_WARNING, cb->host,
 967                              "Failed to get logical drive information\n");
 968                 goto out_free;
 969         }
 970
 971         /*
 972          * Initialize the Controller Model Name and Full Model Name fields.
 973          */
 974         switch (enquiry2->hw.sub_model) {
 975         case DAC960_V1_P_PD_PU:
 976                 if (enquiry2->scsi_cap.bus_speed == MYRB_SCSI_SPEED_ULTRA)
 977                         strcpy(cb->model_name, "DAC960PU");
 978                 else
 979                         strcpy(cb->model_name, "DAC960PD");
 980                 break;
 981         case DAC960_V1_PL:
 982                 strcpy(cb->model_name, "DAC960PL");
 983                 break;
 984         case DAC960_V1_PG:
 985                 strcpy(cb->model_name, "DAC960PG");
 986                 break;
 987         case DAC960_V1_PJ:
 988                 strcpy(cb->model_name, "DAC960PJ");
 989                 break;
 990         case DAC960_V1_PR:
 991                 strcpy(cb->model_name, "DAC960PR");
 992                 break;
 993         case DAC960_V1_PT:
 994                 strcpy(cb->model_name, "DAC960PT");
 995                 break;
 996         case DAC960_V1_PTL0:
 997                 strcpy(cb->model_name, "DAC960PTL0");
 998                 break;
 999         case DAC960_V1_PRL:
1000                 strcpy(cb->model_name, "DAC960PRL");
1001                 break;
1002         case DAC960_V1_PTL1:
1003                 strcpy(cb->model_name, "DAC960PTL1");
1004                 break;
1005         case DAC960_V1_1164P:
1006                 strcpy(cb->model_name, "eXtremeRAID 1100");
1007                 break;
1008         default:
1009                 shost_printk(KERN_WARNING, cb->host,
1010                              "Unknown Model %X\n",
1011                              enquiry2->hw.sub_model);
1012                 goto out;
1013         }
1014         /*
1015          * Initialize the Controller Firmware Version field and verify that it
1016          * is a supported firmware version.
1017          * The supported firmware versions are:
1018          *
1019          * DAC1164P                 5.06 and above
1020          * DAC960PTL/PRL/PJ/PG      4.06 and above
1021          * DAC960PU/PD/PL           3.51 and above
1022          * DAC960PU/PD/PL/P         2.73 and above
1023          */
1024 #if defined(CONFIG_ALPHA)
1025         /*
1026          * DEC Alpha machines were often equipped with DAC960 cards that were
1027          * OEMed from Mylex, and had their own custom firmware. Version 2.70,
1028          * the last custom FW revision to be released by DEC for these older
1029          * controllers, appears to work quite well with this driver.
1030          *
1031          * Cards tested successfully were several versions each of the PD and
1032          * PU, called by DEC the KZPSC and KZPAC, respectively, and having
1033          * the Manufacturer Numbers (from Mylex), usually on a sticker on the
1034          * back of the board, of:
1035          *
1036          * KZPSC:  D040347 (1-channel) or D040348 (2-channel)
1037          *         or D040349 (3-channel)
1038          * KZPAC:  D040395 (1-channel) or D040396 (2-channel)
1039          *         or D040397 (3-channel)
1040          */
1041 # define FIRMWARE_27X   "2.70"
1042 #else
1043 # define FIRMWARE_27X   "2.73"
1044 #endif
1045
1046         if (enquiry2->fw.major_version == 0) {
1047                 enquiry2->fw.major_version = cb->enquiry->fw_major_version;
1048                 enquiry2->fw.minor_version = cb->enquiry->fw_minor_version;
1049                 enquiry2->fw.firmware_type = '0';
1050                 enquiry2->fw.turn_id = 0;
1051         }
1052         sprintf(cb->fw_version, "%d.%02d-%c-%02d",
1053                 enquiry2->fw.major_version,
1054                 enquiry2->fw.minor_version,
1055                 enquiry2->fw.firmware_type,
1056                 enquiry2->fw.turn_id);
1057         if (!((enquiry2->fw.major_version == 5 &&
1058                enquiry2->fw.minor_version >= 6) ||
1059               (enquiry2->fw.major_version == 4 &&
1060                enquiry2->fw.minor_version >= 6) ||
1061               (enquiry2->fw.major_version == 3 &&
1062                enquiry2->fw.minor_version >= 51) ||
1063               (enquiry2->fw.major_version == 2 &&
1064                strcmp(cb->fw_version, FIRMWARE_27X) >= 0))) {
1065                 shost_printk(KERN_WARNING, cb->host,
1066                         "Firmware Version '%s' unsupported\n",
1067                         cb->fw_version);
1068                 goto out;
1069         }
1070         /*
1071          * Initialize the Channels, Targets, Memory Size, and SAF-TE
1072          * Enclosure Management Enabled fields.
1073          */
1074         switch (enquiry2->hw.model) {
1075         case MYRB_5_CHANNEL_BOARD:
1076                 pchan_max = 5;
1077                 break;
1078         case MYRB_3_CHANNEL_BOARD:
1079         case MYRB_3_CHANNEL_ASIC_DAC:
1080                 pchan_max = 3;
1081                 break;
1082         case MYRB_2_CHANNEL_BOARD:
1083                 pchan_max = 2;
1084                 break;
1085         default:
1086                 pchan_max = enquiry2->cfg_chan;
1087                 break;
1088         }
1089         pchan_cur = enquiry2->cur_chan;
1090         if (enquiry2->scsi_cap.bus_width == MYRB_WIDTH_WIDE_32BIT)
1091                 cb->bus_width = 32;
1092         else if (enquiry2->scsi_cap.bus_width == MYRB_WIDTH_WIDE_16BIT)
1093                 cb->bus_width = 16;
1094         else
1095                 cb->bus_width = 8;
1096         cb->ldev_block_size = enquiry2->ldev_block_size;
1097         shost->max_channel = pchan_cur;
1098         shost->max_id = enquiry2->max_targets;
1099         memsize = enquiry2->mem_size >> 20;
1100         cb->safte_enabled = (enquiry2->fault_mgmt == MYRB_FAULT_SAFTE);
1101         /*
1102          * Initialize the Controller Queue Depth, Driver Queue Depth,
1103          * Logical Drive Count, Maximum Blocks per Command, Controller
1104          * Scatter/Gather Limit, and Driver Scatter/Gather Limit.
1105          * The Driver Queue Depth must be at most one less than the
1106          * Controller Queue Depth to allow for an automatic drive
1107          * rebuild operation.
1108          */
1109         shost->can_queue = cb->enquiry->max_tcq;
1110         if (shost->can_queue < 3)
1111                 shost->can_queue = enquiry2->max_cmds;
1112         if (shost->can_queue < 3)
1113                 /* Play safe and disable TCQ */
1114                 shost->can_queue = 1;
1115
1116         if (shost->can_queue > MYRB_CMD_MBOX_COUNT - 2)
1117                 shost->can_queue = MYRB_CMD_MBOX_COUNT - 2;
1118         shost->max_sectors = enquiry2->max_sectors;
1119         shost->sg_tablesize = enquiry2->max_sge;
1120         if (shost->sg_tablesize > MYRB_SCATTER_GATHER_LIMIT)
1121                 shost->sg_tablesize = MYRB_SCATTER_GATHER_LIMIT;
1122         /*
1123          * Initialize the Stripe Size, Segment Size, and Geometry Translation.
1124          */
1125         cb->stripe_size = config2->blocks_per_stripe * config2->block_factor
1126                 >> (10 - MYRB_BLKSIZE_BITS);
1127         cb->segment_size = config2->blocks_per_cacheline * config2->block_factor
1128                 >> (10 - MYRB_BLKSIZE_BITS);
1129         /* Assume 255/63 translation */
1130         cb->ldev_geom_heads = 255;
1131         cb->ldev_geom_sectors = 63;
1132         if (config2->drive_geometry) {
1133                 cb->ldev_geom_heads = 128;
1134                 cb->ldev_geom_sectors = 32;
1135         }
1136
1137         /*
1138          * Initialize the Background Initialization Status.
1139          */
1140         if ((cb->fw_version[0] == '4' &&
1141              strcmp(cb->fw_version, "4.08") >= 0) ||
1142             (cb->fw_version[0] == '5' &&
1143              strcmp(cb->fw_version, "5.08") >= 0)) {
1144                 cb->bgi_status_supported = true;
1145                 myrb_bgi_control(cb);
1146         }
1147         cb->last_rbld_status = MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS;
1148         ret = 0;
1149
1150 out:
1151         shost_printk(KERN_INFO, cb->host,
1152                 "Configuring %s PCI RAID Controller\n", cb->model_name);
1153         shost_printk(KERN_INFO, cb->host,
1154                 "  Firmware Version: %s, Memory Size: %dMB\n",
1155                 cb->fw_version, memsize);
1156         if (cb->io_addr == 0)
1157                 shost_printk(KERN_INFO, cb->host,
1158                         "  I/O Address: n/a, PCI Address: 0x%lX, IRQ Channel: %d\n",
1159                         (unsigned long)cb->pci_addr, cb->irq);
1160         else
1161                 shost_printk(KERN_INFO, cb->host,
1162                         "  I/O Address: 0x%lX, PCI Address: 0x%lX, IRQ Channel: %d\n",
1163                         (unsigned long)cb->io_addr, (unsigned long)cb->pci_addr,
1164                         cb->irq);
1165         shost_printk(KERN_INFO, cb->host,
1166                 "  Controller Queue Depth: %d, Maximum Blocks per Command: %d\n",
1167                 cb->host->can_queue, cb->host->max_sectors);
1168         shost_printk(KERN_INFO, cb->host,
1169                      "  Driver Queue Depth: %d, Scatter/Gather Limit: %d of %d Segments\n",
1170                      cb->host->can_queue, cb->host->sg_tablesize,
1171                      MYRB_SCATTER_GATHER_LIMIT);
1172         shost_printk(KERN_INFO, cb->host,
1173                      "  Stripe Size: %dKB, Segment Size: %dKB, BIOS Geometry: %d/%d%s\n",
1174                      cb->stripe_size, cb->segment_size,
1175                      cb->ldev_geom_heads, cb->ldev_geom_sectors,
1176                      cb->safte_enabled ?
1177                      "  SAF-TE Enclosure Management Enabled" : "");
1178         shost_printk(KERN_INFO, cb->host,
1179                      "  Physical: %d/%d channels %d/%d/%d devices\n",
1180                      pchan_cur, pchan_max, 0, cb->enquiry->pdev_dead,
1181                      cb->host->max_id);
1182
1183         shost_printk(KERN_INFO, cb->host,
1184                      "  Logical: 1/1 channels, %d/%d disks\n",
1185                      cb->enquiry->ldev_count, MYRB_MAX_LDEVS);
1186
1187 out_free:
1188         dma_free_coherent(&pdev->dev, sizeof(struct myrb_enquiry2),
1189                           enquiry2, enquiry2_addr);
1190         dma_free_coherent(&pdev->dev, sizeof(struct myrb_config2),
1191                           config2, config2_addr);
1192
1193         return ret;
1194 }
1195
1196 /**
1197  * myrb_unmap - unmaps controller structures
1198  */
1199 static void myrb_unmap(struct myrb_hba *cb)
1200 {
1201         if (cb->ldev_info_buf) {
1202                 size_t ldev_info_size = sizeof(struct myrb_ldev_info) *
1203                         MYRB_MAX_LDEVS;
1204                 dma_free_coherent(&cb->pdev->dev, ldev_info_size,
1205                                   cb->ldev_info_buf, cb->ldev_info_addr);
1206                 cb->ldev_info_buf = NULL;
1207         }
1208         if (cb->err_table) {
1209                 size_t err_table_size = sizeof(struct myrb_error_entry) *
1210                         MYRB_MAX_CHANNELS * MYRB_MAX_TARGETS;
1211                 dma_free_coherent(&cb->pdev->dev, err_table_size,
1212                                   cb->err_table, cb->err_table_addr);
1213                 cb->err_table = NULL;
1214         }
1215         if (cb->enquiry) {
1216                 dma_free_coherent(&cb->pdev->dev, sizeof(struct myrb_enquiry),
1217                                   cb->enquiry, cb->enquiry_addr);
1218                 cb->enquiry = NULL;
1219         }
1220         if (cb->first_stat_mbox) {
1221                 dma_free_coherent(&cb->pdev->dev, cb->stat_mbox_size,
1222                                   cb->first_stat_mbox, cb->stat_mbox_addr);
1223                 cb->first_stat_mbox = NULL;
1224         }
1225         if (cb->first_cmd_mbox) {
1226                 dma_free_coherent(&cb->pdev->dev, cb->cmd_mbox_size,
1227                                   cb->first_cmd_mbox, cb->cmd_mbox_addr);
1228                 cb->first_cmd_mbox = NULL;
1229         }
1230 }
1231
1232 /**
1233  * myrb_cleanup - cleanup controller structures
1234  */
1235 static void myrb_cleanup(struct myrb_hba *cb)
1236 {
1237         struct pci_dev *pdev = cb->pdev;
1238
1239         /* Free the memory mailbox, status, and related structures */
1240         myrb_unmap(cb);
1241
1242         if (cb->mmio_base) {
1243                 cb->disable_intr(cb->io_base);
1244                 iounmap(cb->mmio_base);
1245         }
1246         if (cb->irq)
1247                 free_irq(cb->irq, cb);
1248         if (cb->io_addr)
1249                 release_region(cb->io_addr, 0x80);
1250         pci_set_drvdata(pdev, NULL);
1251         pci_disable_device(pdev);
1252         scsi_host_put(cb->host);
1253 }
1254
1255 static int myrb_host_reset(struct scsi_cmnd *scmd)
1256 {
1257         struct Scsi_Host *shost = scmd->device->host;
1258         struct myrb_hba *cb = shost_priv(shost);
1259
1260         cb->reset(cb->io_base);
1261         return SUCCESS;
1262 }
1263
1264 static int myrb_pthru_queuecommand(struct Scsi_Host *shost,
1265                 struct scsi_cmnd *scmd)
1266 {
1267         struct myrb_hba *cb = shost_priv(shost);
1268         struct myrb_cmdblk *cmd_blk = scsi_cmd_priv(scmd);
1269         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
1270         struct myrb_dcdb *dcdb;
1271         dma_addr_t dcdb_addr;
1272         struct scsi_device *sdev = scmd->device;
1273         struct scatterlist *sgl;
1274         unsigned long flags;
1275         int nsge;
1276
1277         myrb_reset_cmd(cmd_blk);
1278         dcdb = dma_pool_alloc(cb->dcdb_pool, GFP_ATOMIC, &dcdb_addr);
1279         if (!dcdb)
1280                 return SCSI_MLQUEUE_HOST_BUSY;
1281         nsge = scsi_dma_map(scmd);
1282         if (nsge > 1) {
1283                 dma_pool_free(cb->dcdb_pool, dcdb, dcdb_addr);
1284                 scmd->result = (DID_ERROR << 16);
1285                 scmd->scsi_done(scmd);
1286                 return 0;
1287         }
1288
1289         mbox->type3.opcode = MYRB_CMD_DCDB;
1290         mbox->type3.id = scmd->request->tag + 3;
1291         mbox->type3.addr = dcdb_addr;
1292         dcdb->channel = sdev->channel;
1293         dcdb->target = sdev->id;
1294         switch (scmd->sc_data_direction) {
1295         case DMA_NONE:
1296                 dcdb->data_xfer = MYRB_DCDB_XFER_NONE;
1297                 break;
1298         case DMA_TO_DEVICE:
1299                 dcdb->data_xfer = MYRB_DCDB_XFER_SYSTEM_TO_DEVICE;
1300                 break;
1301         case DMA_FROM_DEVICE:
1302                 dcdb->data_xfer = MYRB_DCDB_XFER_DEVICE_TO_SYSTEM;
1303                 break;
1304         default:
1305                 dcdb->data_xfer = MYRB_DCDB_XFER_ILLEGAL;
1306                 break;
1307         }
1308         dcdb->early_status = false;
1309         if (scmd->request->timeout <= 10)
1310                 dcdb->timeout = MYRB_DCDB_TMO_10_SECS;
1311         else if (scmd->request->timeout <= 60)
1312                 dcdb->timeout = MYRB_DCDB_TMO_60_SECS;
1313         else if (scmd->request->timeout <= 600)
1314                 dcdb->timeout = MYRB_DCDB_TMO_10_MINS;
1315         else
1316                 dcdb->timeout = MYRB_DCDB_TMO_24_HRS;
1317         dcdb->no_autosense = false;
1318         dcdb->allow_disconnect = true;
1319         sgl = scsi_sglist(scmd);
1320         dcdb->dma_addr = sg_dma_address(sgl);
1321         if (sg_dma_len(sgl) > USHRT_MAX) {
1322                 dcdb->xfer_len_lo = sg_dma_len(sgl) & 0xffff;
1323                 dcdb->xfer_len_hi4 = sg_dma_len(sgl) >> 16;
1324         } else {
1325                 dcdb->xfer_len_lo = sg_dma_len(sgl);
1326                 dcdb->xfer_len_hi4 = 0;
1327         }
1328         dcdb->cdb_len = scmd->cmd_len;
1329         dcdb->sense_len = sizeof(dcdb->sense);
1330         memcpy(&dcdb->cdb, scmd->cmnd, scmd->cmd_len);
1331
1332         spin_lock_irqsave(&cb->queue_lock, flags);
1333         cb->qcmd(cb, cmd_blk);
1334         spin_unlock_irqrestore(&cb->queue_lock, flags);
1335         return 0;
1336 }
1337
1338 static void myrb_inquiry(struct myrb_hba *cb,
1339                 struct scsi_cmnd *scmd)
1340 {
1341         unsigned char inq[36] = {
1342                 0x00, 0x00, 0x03, 0x02, 0x20, 0x00, 0x01, 0x00,
1343                 0x4d, 0x59, 0x4c, 0x45, 0x58, 0x20, 0x20, 0x20,
1344                 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
1345                 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
1346                 0x20, 0x20, 0x20, 0x20,
1347         };
1348
1349         if (cb->bus_width > 16)
1350                 inq[7] |= 1 << 6;
1351         if (cb->bus_width > 8)
1352                 inq[7] |= 1 << 5;
1353         memcpy(&inq[16], cb->model_name, 16);
1354         memcpy(&inq[32], cb->fw_version, 1);
1355         memcpy(&inq[33], &cb->fw_version[2], 2);
1356         memcpy(&inq[35], &cb->fw_version[7], 1);
1357
1358         scsi_sg_copy_from_buffer(scmd, (void *)inq, 36);
1359 }
1360
1361 static void
1362 myrb_mode_sense(struct myrb_hba *cb, struct scsi_cmnd *scmd,
1363                 struct myrb_ldev_info *ldev_info)
1364 {
1365         unsigned char modes[32], *mode_pg;
1366         bool dbd;
1367         size_t mode_len;
1368
1369         dbd = (scmd->cmnd[1] & 0x08) == 0x08;
1370         if (dbd) {
1371                 mode_len = 24;
1372                 mode_pg = &modes[4];
1373         } else {
1374                 mode_len = 32;
1375                 mode_pg = &modes[12];
1376         }
1377         memset(modes, 0, sizeof(modes));
1378         modes[0] = mode_len - 1;
1379         if (!dbd) {
1380                 unsigned char *block_desc = &modes[4];
1381
1382                 modes[3] = 8;
1383                 put_unaligned_be32(ldev_info->size, &block_desc[0]);
1384                 put_unaligned_be32(cb->ldev_block_size, &block_desc[5]);
1385         }
1386         mode_pg[0] = 0x08;
1387         mode_pg[1] = 0x12;
1388         if (ldev_info->wb_enabled)
1389                 mode_pg[2] |= 0x04;
1390         if (cb->segment_size) {
1391                 mode_pg[2] |= 0x08;
1392                 put_unaligned_be16(cb->segment_size, &mode_pg[14]);
1393         }
1394
1395         scsi_sg_copy_from_buffer(scmd, modes, mode_len);
1396 }
1397
1398 static void myrb_request_sense(struct myrb_hba *cb,
1399                 struct scsi_cmnd *scmd)
1400 {
1401         scsi_build_sense_buffer(0, scmd->sense_buffer,
1402                                 NO_SENSE, 0, 0);
1403         scsi_sg_copy_from_buffer(scmd, scmd->sense_buffer,
1404                                  SCSI_SENSE_BUFFERSIZE);
1405 }
1406
1407 static void myrb_read_capacity(struct myrb_hba *cb, struct scsi_cmnd *scmd,
1408                 struct myrb_ldev_info *ldev_info)
1409 {
1410         unsigned char data[8];
1411
1412         dev_dbg(&scmd->device->sdev_gendev,
1413                 "Capacity %u, blocksize %u\n",
1414                 ldev_info->size, cb->ldev_block_size);
1415         put_unaligned_be32(ldev_info->size - 1, &data[0]);
1416         put_unaligned_be32(cb->ldev_block_size, &data[4]);
1417         scsi_sg_copy_from_buffer(scmd, data, 8);
1418 }
1419
1420 static int myrb_ldev_queuecommand(struct Scsi_Host *shost,
1421                 struct scsi_cmnd *scmd)
1422 {
1423         struct myrb_hba *cb = shost_priv(shost);
1424         struct myrb_cmdblk *cmd_blk = scsi_cmd_priv(scmd);
1425         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
1426         struct myrb_ldev_info *ldev_info;
1427         struct scsi_device *sdev = scmd->device;
1428         struct scatterlist *sgl;
1429         unsigned long flags;
1430         u64 lba;
1431         u32 block_cnt;
1432         int nsge;
1433
1434         ldev_info = sdev->hostdata;
1435         if (ldev_info->state != MYRB_DEVICE_ONLINE &&
1436             ldev_info->state != MYRB_DEVICE_WO) {
1437                 dev_dbg(&shost->shost_gendev, "ldev %u in state %x, skip\n",
1438                         sdev->id, ldev_info ? ldev_info->state : 0xff);
1439                 scmd->result = (DID_BAD_TARGET << 16);
1440                 scmd->scsi_done(scmd);
1441                 return 0;
1442         }
1443         switch (scmd->cmnd[0]) {
1444         case TEST_UNIT_READY:
1445                 scmd->result = (DID_OK << 16);
1446                 scmd->scsi_done(scmd);
1447                 return 0;
1448         case INQUIRY:
1449                 if (scmd->cmnd[1] & 1) {
1450                         /* Illegal request, invalid field in CDB */
1451                         scsi_build_sense_buffer(0, scmd->sense_buffer,
1452                                                 ILLEGAL_REQUEST, 0x24, 0);
1453                         scmd->result = (DRIVER_SENSE << 24) |
1454                                 SAM_STAT_CHECK_CONDITION;
1455                 } else {
1456                         myrb_inquiry(cb, scmd);
1457                         scmd->result = (DID_OK << 16);
1458                 }
1459                 scmd->scsi_done(scmd);
1460                 return 0;
1461         case SYNCHRONIZE_CACHE:
1462                 scmd->result = (DID_OK << 16);
1463                 scmd->scsi_done(scmd);
1464                 return 0;
1465         case MODE_SENSE:
1466                 if ((scmd->cmnd[2] & 0x3F) != 0x3F &&
1467                     (scmd->cmnd[2] & 0x3F) != 0x08) {
1468                         /* Illegal request, invalid field in CDB */
1469                         scsi_build_sense_buffer(0, scmd->sense_buffer,
1470                                                 ILLEGAL_REQUEST, 0x24, 0);
1471                         scmd->result = (DRIVER_SENSE << 24) |
1472                                 SAM_STAT_CHECK_CONDITION;
1473                 } else {
1474                         myrb_mode_sense(cb, scmd, ldev_info);
1475                         scmd->result = (DID_OK << 16);
1476                 }
1477                 scmd->scsi_done(scmd);
1478                 return 0;
1479         case READ_CAPACITY:
1480                 if ((scmd->cmnd[1] & 1) ||
1481                     (scmd->cmnd[8] & 1)) {
1482                         /* Illegal request, invalid field in CDB */
1483                         scsi_build_sense_buffer(0, scmd->sense_buffer,
1484                                                 ILLEGAL_REQUEST, 0x24, 0);
1485                         scmd->result = (DRIVER_SENSE << 24) |
1486                                 SAM_STAT_CHECK_CONDITION;
1487                         scmd->scsi_done(scmd);
1488                         return 0;
1489                 }
1490                 lba = get_unaligned_be32(&scmd->cmnd[2]);
1491                 if (lba) {
1492                         /* Illegal request, invalid field in CDB */
1493                         scsi_build_sense_buffer(0, scmd->sense_buffer,
1494                                                 ILLEGAL_REQUEST, 0x24, 0);
1495                         scmd->result = (DRIVER_SENSE << 24) |
1496                                 SAM_STAT_CHECK_CONDITION;
1497                         scmd->scsi_done(scmd);
1498                         return 0;
1499                 }
1500                 myrb_read_capacity(cb, scmd, ldev_info);
1501                 scmd->scsi_done(scmd);
1502                 return 0;
1503         case REQUEST_SENSE:
1504                 myrb_request_sense(cb, scmd);
1505                 scmd->result = (DID_OK << 16);
1506                 return 0;
1507         case SEND_DIAGNOSTIC:
1508                 if (scmd->cmnd[1] != 0x04) {
1509                         /* Illegal request, invalid field in CDB */
1510                         scsi_build_sense_buffer(0, scmd->sense_buffer,
1511                                                 ILLEGAL_REQUEST, 0x24, 0);
1512                         scmd->result = (DRIVER_SENSE << 24) |
1513                                 SAM_STAT_CHECK_CONDITION;
1514                 } else {
1515                         /* Assume good status */
1516                         scmd->result = (DID_OK << 16);
1517                 }
1518                 scmd->scsi_done(scmd);
1519                 return 0;
1520         case READ_6:
1521                 if (ldev_info->state == MYRB_DEVICE_WO) {
1522                         /* Data protect, attempt to read invalid data */
1523                         scsi_build_sense_buffer(0, scmd->sense_buffer,
1524                                                 DATA_PROTECT, 0x21, 0x06);
1525                         scmd->result = (DRIVER_SENSE << 24) |
1526                                 SAM_STAT_CHECK_CONDITION;
1527                         scmd->scsi_done(scmd);
1528                         return 0;
1529                 }
1530         case WRITE_6:
1531                 lba = (((scmd->cmnd[1] & 0x1F) << 16) |
1532                        (scmd->cmnd[2] << 8) |
1533                        scmd->cmnd[3]);
1534                 block_cnt = scmd->cmnd[4];
1535                 break;
1536         case READ_10:
1537                 if (ldev_info->state == MYRB_DEVICE_WO) {
1538                         /* Data protect, attempt to read invalid data */
1539                         scsi_build_sense_buffer(0, scmd->sense_buffer,
1540                                                 DATA_PROTECT, 0x21, 0x06);
1541                         scmd->result = (DRIVER_SENSE << 24) |
1542                                 SAM_STAT_CHECK_CONDITION;
1543                         scmd->scsi_done(scmd);
1544                         return 0;
1545                 }
1546         case WRITE_10:
1547         case VERIFY:            /* 0x2F */
1548         case WRITE_VERIFY:      /* 0x2E */
1549                 lba = get_unaligned_be32(&scmd->cmnd[2]);
1550                 block_cnt = get_unaligned_be16(&scmd->cmnd[7]);
1551                 break;
1552         case READ_12:
1553                 if (ldev_info->state == MYRB_DEVICE_WO) {
1554                         /* Data protect, attempt to read invalid data */
1555                         scsi_build_sense_buffer(0, scmd->sense_buffer,
1556                                                 DATA_PROTECT, 0x21, 0x06);
1557                         scmd->result = (DRIVER_SENSE << 24) |
1558                                 SAM_STAT_CHECK_CONDITION;
1559                         scmd->scsi_done(scmd);
1560                         return 0;
1561                 }
1562         case WRITE_12:
1563         case VERIFY_12: /* 0xAF */
1564         case WRITE_VERIFY_12:   /* 0xAE */
1565                 lba = get_unaligned_be32(&scmd->cmnd[2]);
1566                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
1567                 break;
1568         default:
1569                 /* Illegal request, invalid opcode */
1570                 scsi_build_sense_buffer(0, scmd->sense_buffer,
1571                                         ILLEGAL_REQUEST, 0x20, 0);
1572                 scmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1573                 scmd->scsi_done(scmd);
1574                 return 0;
1575         }
1576
1577         myrb_reset_cmd(cmd_blk);
1578         mbox->type5.id = scmd->request->tag + 3;
1579         if (scmd->sc_data_direction == DMA_NONE)
1580                 goto submit;
1581         nsge = scsi_dma_map(scmd);
1582         if (nsge == 1) {
1583                 sgl = scsi_sglist(scmd);
1584                 if (scmd->sc_data_direction == DMA_FROM_DEVICE)
1585                         mbox->type5.opcode = MYRB_CMD_READ;
1586                 else
1587                         mbox->type5.opcode = MYRB_CMD_WRITE;
1588
1589                 mbox->type5.ld.xfer_len = block_cnt;
1590                 mbox->type5.ld.ldev_num = sdev->id;
1591                 mbox->type5.lba = lba;
1592                 mbox->type5.addr = (u32)sg_dma_address(sgl);
1593         } else {
1594                 struct myrb_sge *hw_sgl;
1595                 dma_addr_t hw_sgl_addr;
1596                 int i;
1597
1598                 hw_sgl = dma_pool_alloc(cb->sg_pool, GFP_ATOMIC, &hw_sgl_addr);
1599                 if (!hw_sgl)
1600                         return SCSI_MLQUEUE_HOST_BUSY;
1601
1602                 cmd_blk->sgl = hw_sgl;
1603                 cmd_blk->sgl_addr = hw_sgl_addr;
1604
1605                 if (scmd->sc_data_direction == DMA_FROM_DEVICE)
1606                         mbox->type5.opcode = MYRB_CMD_READ_SG;
1607                 else
1608                         mbox->type5.opcode = MYRB_CMD_WRITE_SG;
1609
1610                 mbox->type5.ld.xfer_len = block_cnt;
1611                 mbox->type5.ld.ldev_num = sdev->id;
1612                 mbox->type5.lba = lba;
1613                 mbox->type5.addr = hw_sgl_addr;
1614                 mbox->type5.sg_count = nsge;
1615
1616                 scsi_for_each_sg(scmd, sgl, nsge, i) {
1617                         hw_sgl->sge_addr = (u32)sg_dma_address(sgl);
1618                         hw_sgl->sge_count = (u32)sg_dma_len(sgl);
1619                         hw_sgl++;
1620                 }
1621         }
1622 submit:
1623         spin_lock_irqsave(&cb->queue_lock, flags);
1624         cb->qcmd(cb, cmd_blk);
1625         spin_unlock_irqrestore(&cb->queue_lock, flags);
1626
1627         return 0;
1628 }
1629
1630 static int myrb_queuecommand(struct Scsi_Host *shost,
1631                 struct scsi_cmnd *scmd)
1632 {
1633         struct scsi_device *sdev = scmd->device;
1634
1635         if (sdev->channel > myrb_logical_channel(shost)) {
1636                 scmd->result = (DID_BAD_TARGET << 16);
1637                 scmd->scsi_done(scmd);
1638                 return 0;
1639         }
1640         if (sdev->channel == myrb_logical_channel(shost))
1641                 return myrb_ldev_queuecommand(shost, scmd);
1642
1643         return myrb_pthru_queuecommand(shost, scmd);
1644 }
1645
1646 static int myrb_ldev_slave_alloc(struct scsi_device *sdev)
1647 {
1648         struct myrb_hba *cb = shost_priv(sdev->host);
1649         struct myrb_ldev_info *ldev_info;
1650         unsigned short ldev_num = sdev->id;
1651         enum raid_level level;
1652
1653         ldev_info = cb->ldev_info_buf + ldev_num;
1654         if (!ldev_info)
1655                 return -ENXIO;
1656
1657         sdev->hostdata = kzalloc(sizeof(*ldev_info), GFP_KERNEL);
1658         if (!sdev->hostdata)
1659                 return -ENOMEM;
1660         dev_dbg(&sdev->sdev_gendev,
1661                 "slave alloc ldev %d state %x\n",
1662                 ldev_num, ldev_info->state);
1663         memcpy(sdev->hostdata, ldev_info,
1664                sizeof(*ldev_info));
1665         switch (ldev_info->raid_level) {
1666         case MYRB_RAID_LEVEL0:
1667                 level = RAID_LEVEL_LINEAR;
1668                 break;
1669         case MYRB_RAID_LEVEL1:
1670                 level = RAID_LEVEL_1;
1671                 break;
1672         case MYRB_RAID_LEVEL3:
1673                 level = RAID_LEVEL_3;
1674                 break;
1675         case MYRB_RAID_LEVEL5:
1676                 level = RAID_LEVEL_5;
1677                 break;
1678         case MYRB_RAID_LEVEL6:
1679                 level = RAID_LEVEL_6;
1680                 break;
1681         case MYRB_RAID_JBOD:
1682                 level = RAID_LEVEL_JBOD;
1683                 break;
1684         default:
1685                 level = RAID_LEVEL_UNKNOWN;
1686                 break;
1687         }
1688         raid_set_level(myrb_raid_template, &sdev->sdev_gendev, level);
1689         return 0;
1690 }
1691
1692 static int myrb_pdev_slave_alloc(struct scsi_device *sdev)
1693 {
1694         struct myrb_hba *cb = shost_priv(sdev->host);
1695         struct myrb_pdev_state *pdev_info;
1696         unsigned short status;
1697
1698         if (sdev->id > MYRB_MAX_TARGETS)
1699                 return -ENXIO;
1700
1701         pdev_info = kzalloc(sizeof(*pdev_info), GFP_KERNEL|GFP_DMA);
1702         if (!pdev_info)
1703                 return -ENOMEM;
1704
1705         status = myrb_exec_type3D(cb, MYRB_CMD_GET_DEVICE_STATE,
1706                                   sdev, pdev_info);
1707         if (status != MYRB_STATUS_SUCCESS) {
1708                 dev_dbg(&sdev->sdev_gendev,
1709                         "Failed to get device state, status %x\n",
1710                         status);
1711                 kfree(pdev_info);
1712                 return -ENXIO;
1713         }
1714         if (!pdev_info->present) {
1715                 dev_dbg(&sdev->sdev_gendev,
1716                         "device not present, skip\n");
1717                 kfree(pdev_info);
1718                 return -ENXIO;
1719         }
1720         dev_dbg(&sdev->sdev_gendev,
1721                 "slave alloc pdev %d:%d state %x\n",
1722                 sdev->channel, sdev->id, pdev_info->state);
1723         sdev->hostdata = pdev_info;
1724
1725         return 0;
1726 }
1727
1728 static int myrb_slave_alloc(struct scsi_device *sdev)
1729 {
1730         if (sdev->channel > myrb_logical_channel(sdev->host))
1731                 return -ENXIO;
1732
1733         if (sdev->lun > 0)
1734                 return -ENXIO;
1735
1736         if (sdev->channel == myrb_logical_channel(sdev->host))
1737                 return myrb_ldev_slave_alloc(sdev);
1738
1739         return myrb_pdev_slave_alloc(sdev);
1740 }
1741
1742 static int myrb_slave_configure(struct scsi_device *sdev)
1743 {
1744         struct myrb_ldev_info *ldev_info;
1745
1746         if (sdev->channel > myrb_logical_channel(sdev->host))
1747                 return -ENXIO;
1748
1749         if (sdev->channel < myrb_logical_channel(sdev->host)) {
1750                 sdev->no_uld_attach = 1;
1751                 return 0;
1752         }
1753         if (sdev->lun != 0)
1754                 return -ENXIO;
1755
1756         ldev_info = sdev->hostdata;
1757         if (!ldev_info)
1758                 return -ENXIO;
1759         if (ldev_info->state != MYRB_DEVICE_ONLINE)
1760                 sdev_printk(KERN_INFO, sdev,
1761                             "Logical drive is %s\n",
1762                             myrb_devstate_name(ldev_info->state));
1763
1764         sdev->tagged_supported = 1;
1765         return 0;
1766 }
1767
1768 static void myrb_slave_destroy(struct scsi_device *sdev)
1769 {
1770         kfree(sdev->hostdata);
1771 }
1772
1773 static int myrb_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1774                 sector_t capacity, int geom[])
1775 {
1776         struct myrb_hba *cb = shost_priv(sdev->host);
1777
1778         geom[0] = cb->ldev_geom_heads;
1779         geom[1] = cb->ldev_geom_sectors;
1780         geom[2] = sector_div(capacity, geom[0] * geom[1]);
1781
1782         return 0;
1783 }
1784
1785 static ssize_t raid_state_show(struct device *dev,
1786                 struct device_attribute *attr, char *buf)
1787 {
1788         struct scsi_device *sdev = to_scsi_device(dev);
1789         struct myrb_hba *cb = shost_priv(sdev->host);
1790         int ret;
1791
1792         if (!sdev->hostdata)
1793                 return snprintf(buf, 16, "Unknown\n");
1794
1795         if (sdev->channel == myrb_logical_channel(sdev->host)) {
1796                 struct myrb_ldev_info *ldev_info = sdev->hostdata;
1797                 const char *name;
1798
1799                 name = myrb_devstate_name(ldev_info->state);
1800                 if (name)
1801                         ret = snprintf(buf, 32, "%s\n", name);
1802                 else
1803                         ret = snprintf(buf, 32, "Invalid (%02X)\n",
1804                                        ldev_info->state);
1805         } else {
1806                 struct myrb_pdev_state *pdev_info = sdev->hostdata;
1807                 unsigned short status;
1808                 const char *name;
1809
1810                 status = myrb_exec_type3D(cb, MYRB_CMD_GET_DEVICE_STATE,
1811                                           sdev, pdev_info);
1812                 if (status != MYRB_STATUS_SUCCESS)
1813                         sdev_printk(KERN_INFO, sdev,
1814                                     "Failed to get device state, status %x\n",
1815                                     status);
1816
1817                 if (!pdev_info->present)
1818                         name = "Removed";
1819                 else
1820                         name = myrb_devstate_name(pdev_info->state);
1821                 if (name)
1822                         ret = snprintf(buf, 32, "%s\n", name);
1823                 else
1824                         ret = snprintf(buf, 32, "Invalid (%02X)\n",
1825                                        pdev_info->state);
1826         }
1827         return ret;
1828 }
1829
1830 static ssize_t raid_state_store(struct device *dev,
1831                 struct device_attribute *attr, const char *buf, size_t count)
1832 {
1833         struct scsi_device *sdev = to_scsi_device(dev);
1834         struct myrb_hba *cb = shost_priv(sdev->host);
1835         struct myrb_pdev_state *pdev_info;
1836         enum myrb_devstate new_state;
1837         unsigned short status;
1838
1839         if (!strncmp(buf, "kill", 4) ||
1840             !strncmp(buf, "offline", 7))
1841                 new_state = MYRB_DEVICE_DEAD;
1842         else if (!strncmp(buf, "online", 6))
1843                 new_state = MYRB_DEVICE_ONLINE;
1844         else if (!strncmp(buf, "standby", 7))
1845                 new_state = MYRB_DEVICE_STANDBY;
1846         else
1847                 return -EINVAL;
1848
1849         pdev_info = sdev->hostdata;
1850         if (!pdev_info) {
1851                 sdev_printk(KERN_INFO, sdev,
1852                             "Failed - no physical device information\n");
1853                 return -ENXIO;
1854         }
1855         if (!pdev_info->present) {
1856                 sdev_printk(KERN_INFO, sdev,
1857                             "Failed - device not present\n");
1858                 return -ENXIO;
1859         }
1860
1861         if (pdev_info->state == new_state)
1862                 return count;
1863
1864         status = myrb_set_pdev_state(cb, sdev, new_state);
1865         switch (status) {
1866         case MYRB_STATUS_SUCCESS:
1867                 break;
1868         case MYRB_STATUS_START_DEVICE_FAILED:
1869                 sdev_printk(KERN_INFO, sdev,
1870                              "Failed - Unable to Start Device\n");
1871                 count = -EAGAIN;
1872                 break;
1873         case MYRB_STATUS_NO_DEVICE:
1874                 sdev_printk(KERN_INFO, sdev,
1875                             "Failed - No Device at Address\n");
1876                 count = -ENODEV;
1877                 break;
1878         case MYRB_STATUS_INVALID_CHANNEL_OR_TARGET:
1879                 sdev_printk(KERN_INFO, sdev,
1880                          "Failed - Invalid Channel or Target or Modifier\n");
1881                 count = -EINVAL;
1882                 break;
1883         case MYRB_STATUS_CHANNEL_BUSY:
1884                 sdev_printk(KERN_INFO, sdev,
1885                          "Failed - Channel Busy\n");
1886                 count = -EBUSY;
1887                 break;
1888         default:
1889                 sdev_printk(KERN_INFO, sdev,
1890                          "Failed - Unexpected Status %04X\n", status);
1891                 count = -EIO;
1892                 break;
1893         }
1894         return count;
1895 }
1896 static DEVICE_ATTR_RW(raid_state);
1897
1898 static ssize_t raid_level_show(struct device *dev,
1899                 struct device_attribute *attr, char *buf)
1900 {
1901         struct scsi_device *sdev = to_scsi_device(dev);
1902
1903         if (sdev->channel == myrb_logical_channel(sdev->host)) {
1904                 struct myrb_ldev_info *ldev_info = sdev->hostdata;
1905                 const char *name;
1906
1907                 if (!ldev_info)
1908                         return -ENXIO;
1909
1910                 name = myrb_raidlevel_name(ldev_info->raid_level);
1911                 if (!name)
1912                         return snprintf(buf, 32, "Invalid (%02X)\n",
1913                                         ldev_info->state);
1914                 return snprintf(buf, 32, "%s\n", name);
1915         }
1916         return snprintf(buf, 32, "Physical Drive\n");
1917 }
1918 static DEVICE_ATTR_RO(raid_level);
1919
1920 static ssize_t rebuild_show(struct device *dev,
1921                 struct device_attribute *attr, char *buf)
1922 {
1923         struct scsi_device *sdev = to_scsi_device(dev);
1924         struct myrb_hba *cb = shost_priv(sdev->host);
1925         struct myrb_rbld_progress rbld_buf;
1926         unsigned char status;
1927
1928         if (sdev->channel < myrb_logical_channel(sdev->host))
1929                 return snprintf(buf, 32, "physical device - not rebuilding\n");
1930
1931         status = myrb_get_rbld_progress(cb, &rbld_buf);
1932
1933         if (rbld_buf.ldev_num != sdev->id ||
1934             status != MYRB_STATUS_SUCCESS)
1935                 return snprintf(buf, 32, "not rebuilding\n");
1936
1937         return snprintf(buf, 32, "rebuilding block %u of %u\n",
1938                         rbld_buf.ldev_size - rbld_buf.blocks_left,
1939                         rbld_buf.ldev_size);
1940 }
1941
1942 static ssize_t rebuild_store(struct device *dev,
1943                 struct device_attribute *attr, const char *buf, size_t count)
1944 {
1945         struct scsi_device *sdev = to_scsi_device(dev);
1946         struct myrb_hba *cb = shost_priv(sdev->host);
1947         struct myrb_cmdblk *cmd_blk;
1948         union myrb_cmd_mbox *mbox;
1949         unsigned short status;
1950         int rc, start;
1951         const char *msg;
1952
1953         rc = kstrtoint(buf, 0, &start);
1954         if (rc)
1955                 return rc;
1956
1957         if (sdev->channel >= myrb_logical_channel(sdev->host))
1958                 return -ENXIO;
1959
1960         status = myrb_get_rbld_progress(cb, NULL);
1961         if (start) {
1962                 if (status == MYRB_STATUS_SUCCESS) {
1963                         sdev_printk(KERN_INFO, sdev,
1964                                     "Rebuild Not Initiated; already in progress\n");
1965                         return -EALREADY;
1966                 }
1967                 mutex_lock(&cb->dcmd_mutex);
1968                 cmd_blk = &cb->dcmd_blk;
1969                 myrb_reset_cmd(cmd_blk);
1970                 mbox = &cmd_blk->mbox;
1971                 mbox->type3D.opcode = MYRB_CMD_REBUILD_ASYNC;
1972                 mbox->type3D.id = MYRB_DCMD_TAG;
1973                 mbox->type3D.channel = sdev->channel;
1974                 mbox->type3D.target = sdev->id;
1975                 status = myrb_exec_cmd(cb, cmd_blk);
1976                 mutex_unlock(&cb->dcmd_mutex);
1977         } else {
1978                 struct pci_dev *pdev = cb->pdev;
1979                 unsigned char *rate;
1980                 dma_addr_t rate_addr;
1981
1982                 if (status != MYRB_STATUS_SUCCESS) {
1983                         sdev_printk(KERN_INFO, sdev,
1984                                     "Rebuild Not Cancelled; not in progress\n");
1985                         return 0;
1986                 }
1987
1988                 rate = dma_alloc_coherent(&pdev->dev, sizeof(char),
1989                                           &rate_addr, GFP_KERNEL);
1990                 if (rate == NULL) {
1991                         sdev_printk(KERN_INFO, sdev,
1992                                     "Cancellation of Rebuild Failed - Out of Memory\n");
1993                         return -ENOMEM;
1994                 }
1995                 mutex_lock(&cb->dcmd_mutex);
1996                 cmd_blk = &cb->dcmd_blk;
1997                 myrb_reset_cmd(cmd_blk);
1998                 mbox = &cmd_blk->mbox;
1999                 mbox->type3R.opcode = MYRB_CMD_REBUILD_CONTROL;
2000                 mbox->type3R.id = MYRB_DCMD_TAG;
2001                 mbox->type3R.rbld_rate = 0xFF;
2002                 mbox->type3R.addr = rate_addr;
2003                 status = myrb_exec_cmd(cb, cmd_blk);
2004                 dma_free_coherent(&pdev->dev, sizeof(char), rate, rate_addr);
2005                 mutex_unlock(&cb->dcmd_mutex);
2006         }
2007         if (status == MYRB_STATUS_SUCCESS) {
2008                 sdev_printk(KERN_INFO, sdev, "Rebuild %s\n",
2009                             start ? "Initiated" : "Cancelled");
2010                 return count;
2011         }
2012         if (!start) {
2013                 sdev_printk(KERN_INFO, sdev,
2014                             "Rebuild Not Cancelled, status 0x%x\n",
2015                             status);
2016                 return -EIO;
2017         }
2018
2019         switch (status) {
2020         case MYRB_STATUS_ATTEMPT_TO_RBLD_ONLINE_DRIVE:
2021                 msg = "Attempt to Rebuild Online or Unresponsive Drive";
2022                 break;
2023         case MYRB_STATUS_RBLD_NEW_DISK_FAILED:
2024                 msg = "New Disk Failed During Rebuild";
2025                 break;
2026         case MYRB_STATUS_INVALID_ADDRESS:
2027                 msg = "Invalid Device Address";
2028                 break;
2029         case MYRB_STATUS_RBLD_OR_CHECK_INPROGRESS:
2030                 msg = "Already in Progress";
2031                 break;
2032         default:
2033                 msg = NULL;
2034                 break;
2035         }
2036         if (msg)
2037                 sdev_printk(KERN_INFO, sdev,
2038                             "Rebuild Failed - %s\n", msg);
2039         else
2040                 sdev_printk(KERN_INFO, sdev,
2041                             "Rebuild Failed, status 0x%x\n", status);
2042
2043         return -EIO;
2044 }
2045 static DEVICE_ATTR_RW(rebuild);
2046
2047 static ssize_t consistency_check_store(struct device *dev,
2048                 struct device_attribute *attr, const char *buf, size_t count)
2049 {
2050         struct scsi_device *sdev = to_scsi_device(dev);
2051         struct myrb_hba *cb = shost_priv(sdev->host);
2052         struct myrb_rbld_progress rbld_buf;
2053         struct myrb_cmdblk *cmd_blk;
2054         union myrb_cmd_mbox *mbox;
2055         unsigned short ldev_num = 0xFFFF;
2056         unsigned short status;
2057         int rc, start;
2058         const char *msg;
2059
2060         rc = kstrtoint(buf, 0, &start);
2061         if (rc)
2062                 return rc;
2063
2064         if (sdev->channel < myrb_logical_channel(sdev->host))
2065                 return -ENXIO;
2066
2067         status = myrb_get_rbld_progress(cb, &rbld_buf);
2068         if (start) {
2069                 if (status == MYRB_STATUS_SUCCESS) {
2070                         sdev_printk(KERN_INFO, sdev,
2071                                     "Check Consistency Not Initiated; already in progress\n");
2072                         return -EALREADY;
2073                 }
2074                 mutex_lock(&cb->dcmd_mutex);
2075                 cmd_blk = &cb->dcmd_blk;
2076                 myrb_reset_cmd(cmd_blk);
2077                 mbox = &cmd_blk->mbox;
2078                 mbox->type3C.opcode = MYRB_CMD_CHECK_CONSISTENCY_ASYNC;
2079                 mbox->type3C.id = MYRB_DCMD_TAG;
2080                 mbox->type3C.ldev_num = sdev->id;
2081                 mbox->type3C.auto_restore = true;
2082
2083                 status = myrb_exec_cmd(cb, cmd_blk);
2084                 mutex_unlock(&cb->dcmd_mutex);
2085         } else {
2086                 struct pci_dev *pdev = cb->pdev;
2087                 unsigned char *rate;
2088                 dma_addr_t rate_addr;
2089
2090                 if (ldev_num != sdev->id) {
2091                         sdev_printk(KERN_INFO, sdev,
2092                                     "Check Consistency Not Cancelled; not in progress\n");
2093                         return 0;
2094                 }
2095                 rate = dma_alloc_coherent(&pdev->dev, sizeof(char),
2096                                           &rate_addr, GFP_KERNEL);
2097                 if (rate == NULL) {
2098                         sdev_printk(KERN_INFO, sdev,
2099                                     "Cancellation of Check Consistency Failed - Out of Memory\n");
2100                         return -ENOMEM;
2101                 }
2102                 mutex_lock(&cb->dcmd_mutex);
2103                 cmd_blk = &cb->dcmd_blk;
2104                 myrb_reset_cmd(cmd_blk);
2105                 mbox = &cmd_blk->mbox;
2106                 mbox->type3R.opcode = MYRB_CMD_REBUILD_CONTROL;
2107                 mbox->type3R.id = MYRB_DCMD_TAG;
2108                 mbox->type3R.rbld_rate = 0xFF;
2109                 mbox->type3R.addr = rate_addr;
2110                 status = myrb_exec_cmd(cb, cmd_blk);
2111                 dma_free_coherent(&pdev->dev, sizeof(char), rate, rate_addr);
2112                 mutex_unlock(&cb->dcmd_mutex);
2113         }
2114         if (status == MYRB_STATUS_SUCCESS) {
2115                 sdev_printk(KERN_INFO, sdev, "Check Consistency %s\n",
2116                             start ? "Initiated" : "Cancelled");
2117                 return count;
2118         }
2119         if (!start) {
2120                 sdev_printk(KERN_INFO, sdev,
2121                             "Check Consistency Not Cancelled, status 0x%x\n",
2122                             status);
2123                 return -EIO;
2124         }
2125
2126         switch (status) {
2127         case MYRB_STATUS_ATTEMPT_TO_RBLD_ONLINE_DRIVE:
2128                 msg = "Dependent Physical Device is DEAD";
2129                 break;
2130         case MYRB_STATUS_RBLD_NEW_DISK_FAILED:
2131                 msg = "New Disk Failed During Rebuild";
2132                 break;
2133         case MYRB_STATUS_INVALID_ADDRESS:
2134                 msg = "Invalid or Nonredundant Logical Drive";
2135                 break;
2136         case MYRB_STATUS_RBLD_OR_CHECK_INPROGRESS:
2137                 msg = "Already in Progress";
2138                 break;
2139         default:
2140                 msg = NULL;
2141                 break;
2142         }
2143         if (msg)
2144                 sdev_printk(KERN_INFO, sdev,
2145                             "Check Consistency Failed - %s\n", msg);
2146         else
2147                 sdev_printk(KERN_INFO, sdev,
2148                             "Check Consistency Failed, status 0x%x\n", status);
2149
2150         return -EIO;
2151 }
2152
2153 static ssize_t consistency_check_show(struct device *dev,
2154                 struct device_attribute *attr, char *buf)
2155 {
2156         return rebuild_show(dev, attr, buf);
2157 }
2158 static DEVICE_ATTR_RW(consistency_check);
2159
2160 static ssize_t ctlr_num_show(struct device *dev,
2161                 struct device_attribute *attr, char *buf)
2162 {
2163         struct Scsi_Host *shost = class_to_shost(dev);
2164         struct myrb_hba *cb = shost_priv(shost);
2165
2166         return snprintf(buf, 20, "%d\n", cb->ctlr_num);
2167 }
2168 static DEVICE_ATTR_RO(ctlr_num);
2169
2170 static ssize_t firmware_show(struct device *dev,
2171                 struct device_attribute *attr, char *buf)
2172 {
2173         struct Scsi_Host *shost = class_to_shost(dev);
2174         struct myrb_hba *cb = shost_priv(shost);
2175
2176         return snprintf(buf, 16, "%s\n", cb->fw_version);
2177 }
2178 static DEVICE_ATTR_RO(firmware);
2179
2180 static ssize_t model_show(struct device *dev,
2181                 struct device_attribute *attr, char *buf)
2182 {
2183         struct Scsi_Host *shost = class_to_shost(dev);
2184         struct myrb_hba *cb = shost_priv(shost);
2185
2186         return snprintf(buf, 16, "%s\n", cb->model_name);
2187 }
2188 static DEVICE_ATTR_RO(model);
2189
2190 static ssize_t flush_cache_store(struct device *dev,
2191                 struct device_attribute *attr, const char *buf, size_t count)
2192 {
2193         struct Scsi_Host *shost = class_to_shost(dev);
2194         struct myrb_hba *cb = shost_priv(shost);
2195         unsigned short status;
2196
2197         status = myrb_exec_type3(cb, MYRB_CMD_FLUSH, 0);
2198         if (status == MYRB_STATUS_SUCCESS) {
2199                 shost_printk(KERN_INFO, shost,
2200                              "Cache Flush Completed\n");
2201                 return count;
2202         }
2203         shost_printk(KERN_INFO, shost,
2204                      "Cache Flush Failed, status %x\n", status);
2205         return -EIO;
2206 }
2207 static DEVICE_ATTR_WO(flush_cache);
2208
2209 static struct device_attribute *myrb_sdev_attrs[] = {
2210         &dev_attr_rebuild,
2211         &dev_attr_consistency_check,
2212         &dev_attr_raid_state,
2213         &dev_attr_raid_level,
2214         NULL,
2215 };
2216
2217 static struct device_attribute *myrb_shost_attrs[] = {
2218         &dev_attr_ctlr_num,
2219         &dev_attr_model,
2220         &dev_attr_firmware,
2221         &dev_attr_flush_cache,
2222         NULL,
2223 };
2224
2225 struct scsi_host_template myrb_template = {
2226         .module                 = THIS_MODULE,
2227         .name                   = "DAC960",
2228         .proc_name              = "myrb",
2229         .queuecommand           = myrb_queuecommand,
2230         .eh_host_reset_handler  = myrb_host_reset,
2231         .slave_alloc            = myrb_slave_alloc,
2232         .slave_configure        = myrb_slave_configure,
2233         .slave_destroy          = myrb_slave_destroy,
2234         .bios_param             = myrb_biosparam,
2235         .cmd_size               = sizeof(struct myrb_cmdblk),
2236         .shost_attrs            = myrb_shost_attrs,
2237         .sdev_attrs             = myrb_sdev_attrs,
2238         .this_id                = -1,
2239 };
2240
2241 /**
2242  * myrb_is_raid - return boolean indicating device is raid volume
2243  * @dev the device struct object
2244  */
2245 static int myrb_is_raid(struct device *dev)
2246 {
2247         struct scsi_device *sdev = to_scsi_device(dev);
2248
2249         return sdev->channel == myrb_logical_channel(sdev->host);
2250 }
2251
2252 /**
2253  * myrb_get_resync - get raid volume resync percent complete
2254  * @dev the device struct object
2255  */
2256 static void myrb_get_resync(struct device *dev)
2257 {
2258         struct scsi_device *sdev = to_scsi_device(dev);
2259         struct myrb_hba *cb = shost_priv(sdev->host);
2260         struct myrb_rbld_progress rbld_buf;
2261         unsigned int percent_complete = 0;
2262         unsigned short status;
2263         unsigned int ldev_size = 0, remaining = 0;
2264
2265         if (sdev->channel < myrb_logical_channel(sdev->host))
2266                 return;
2267         status = myrb_get_rbld_progress(cb, &rbld_buf);
2268         if (status == MYRB_STATUS_SUCCESS) {
2269                 if (rbld_buf.ldev_num == sdev->id) {
2270                         ldev_size = rbld_buf.ldev_size;
2271                         remaining = rbld_buf.blocks_left;
2272                 }
2273         }
2274         if (remaining && ldev_size)
2275                 percent_complete = (ldev_size - remaining) * 100 / ldev_size;
2276         raid_set_resync(myrb_raid_template, dev, percent_complete);
2277 }
2278
2279 /**
2280  * myrb_get_state - get raid volume status
2281  * @dev the device struct object
2282  */
2283 static void myrb_get_state(struct device *dev)
2284 {
2285         struct scsi_device *sdev = to_scsi_device(dev);
2286         struct myrb_hba *cb = shost_priv(sdev->host);
2287         struct myrb_ldev_info *ldev_info = sdev->hostdata;
2288         enum raid_state state = RAID_STATE_UNKNOWN;
2289         unsigned short status;
2290
2291         if (sdev->channel < myrb_logical_channel(sdev->host) || !ldev_info)
2292                 state = RAID_STATE_UNKNOWN;
2293         else {
2294                 status = myrb_get_rbld_progress(cb, NULL);
2295                 if (status == MYRB_STATUS_SUCCESS)
2296                         state = RAID_STATE_RESYNCING;
2297                 else {
2298                         switch (ldev_info->state) {
2299                         case MYRB_DEVICE_ONLINE:
2300                                 state = RAID_STATE_ACTIVE;
2301                                 break;
2302                         case MYRB_DEVICE_WO:
2303                         case MYRB_DEVICE_CRITICAL:
2304                                 state = RAID_STATE_DEGRADED;
2305                                 break;
2306                         default:
2307                                 state = RAID_STATE_OFFLINE;
2308                         }
2309                 }
2310         }
2311         raid_set_state(myrb_raid_template, dev, state);
2312 }
2313
2314 struct raid_function_template myrb_raid_functions = {
2315         .cookie         = &myrb_template,
2316         .is_raid        = myrb_is_raid,
2317         .get_resync     = myrb_get_resync,
2318         .get_state      = myrb_get_state,
2319 };
2320
2321 static void myrb_handle_scsi(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk,
2322                 struct scsi_cmnd *scmd)
2323 {
2324         unsigned short status;
2325
2326         if (!cmd_blk)
2327                 return;
2328
2329         scsi_dma_unmap(scmd);
2330
2331         if (cmd_blk->dcdb) {
2332                 memcpy(scmd->sense_buffer, &cmd_blk->dcdb->sense, 64);
2333                 dma_pool_free(cb->dcdb_pool, cmd_blk->dcdb,
2334                               cmd_blk->dcdb_addr);
2335                 cmd_blk->dcdb = NULL;
2336         }
2337         if (cmd_blk->sgl) {
2338                 dma_pool_free(cb->sg_pool, cmd_blk->sgl, cmd_blk->sgl_addr);
2339                 cmd_blk->sgl = NULL;
2340                 cmd_blk->sgl_addr = 0;
2341         }
2342         status = cmd_blk->status;
2343         switch (status) {
2344         case MYRB_STATUS_SUCCESS:
2345         case MYRB_STATUS_DEVICE_BUSY:
2346                 scmd->result = (DID_OK << 16) | status;
2347                 break;
2348         case MYRB_STATUS_BAD_DATA:
2349                 dev_dbg(&scmd->device->sdev_gendev,
2350                         "Bad Data Encountered\n");
2351                 if (scmd->sc_data_direction == DMA_FROM_DEVICE)
2352                         /* Unrecovered read error */
2353                         scsi_build_sense_buffer(0, scmd->sense_buffer,
2354                                                 MEDIUM_ERROR, 0x11, 0);
2355                 else
2356                         /* Write error */
2357                         scsi_build_sense_buffer(0, scmd->sense_buffer,
2358                                                 MEDIUM_ERROR, 0x0C, 0);
2359                 scmd->result = (DID_OK << 16) | SAM_STAT_CHECK_CONDITION;
2360                 break;
2361         case MYRB_STATUS_IRRECOVERABLE_DATA_ERROR:
2362                 scmd_printk(KERN_ERR, scmd, "Irrecoverable Data Error\n");
2363                 if (scmd->sc_data_direction == DMA_FROM_DEVICE)
2364                         /* Unrecovered read error, auto-reallocation failed */
2365                         scsi_build_sense_buffer(0, scmd->sense_buffer,
2366                                                 MEDIUM_ERROR, 0x11, 0x04);
2367                 else
2368                         /* Write error, auto-reallocation failed */
2369                         scsi_build_sense_buffer(0, scmd->sense_buffer,
2370                                                 MEDIUM_ERROR, 0x0C, 0x02);
2371                 scmd->result = (DID_OK << 16) | SAM_STAT_CHECK_CONDITION;
2372                 break;
2373         case MYRB_STATUS_LDRV_NONEXISTENT_OR_OFFLINE:
2374                 dev_dbg(&scmd->device->sdev_gendev,
2375                             "Logical Drive Nonexistent or Offline");
2376                 scmd->result = (DID_BAD_TARGET << 16);
2377                 break;
2378         case MYRB_STATUS_ACCESS_BEYOND_END_OF_LDRV:
2379                 dev_dbg(&scmd->device->sdev_gendev,
2380                             "Attempt to Access Beyond End of Logical Drive");
2381                 /* Logical block address out of range */
2382                 scsi_build_sense_buffer(0, scmd->sense_buffer,
2383                                         NOT_READY, 0x21, 0);
2384                 break;
2385         case MYRB_STATUS_DEVICE_NONRESPONSIVE:
2386                 dev_dbg(&scmd->device->sdev_gendev, "Device nonresponsive\n");
2387                 scmd->result = (DID_BAD_TARGET << 16);
2388                 break;
2389         default:
2390                 scmd_printk(KERN_ERR, scmd,
2391                             "Unexpected Error Status %04X", status);
2392                 scmd->result = (DID_ERROR << 16);
2393                 break;
2394         }
2395         scmd->scsi_done(scmd);
2396 }
2397
2398 static void myrb_handle_cmdblk(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk)
2399 {
2400         if (!cmd_blk)
2401                 return;
2402
2403         if (cmd_blk->completion) {
2404                 complete(cmd_blk->completion);
2405                 cmd_blk->completion = NULL;
2406         }
2407 }
2408
2409 static void myrb_monitor(struct work_struct *work)
2410 {
2411         struct myrb_hba *cb = container_of(work,
2412                         struct myrb_hba, monitor_work.work);
2413         struct Scsi_Host *shost = cb->host;
2414         unsigned long interval = MYRB_PRIMARY_MONITOR_INTERVAL;
2415
2416         dev_dbg(&shost->shost_gendev, "monitor tick\n");
2417
2418         if (cb->new_ev_seq > cb->old_ev_seq) {
2419                 int event = cb->old_ev_seq;
2420
2421                 dev_dbg(&shost->shost_gendev,
2422                         "get event log no %d/%d\n",
2423                         cb->new_ev_seq, event);
2424                 myrb_get_event(cb, event);
2425                 cb->old_ev_seq = event + 1;
2426                 interval = 10;
2427         } else if (cb->need_err_info) {
2428                 cb->need_err_info = false;
2429                 dev_dbg(&shost->shost_gendev, "get error table\n");
2430                 myrb_get_errtable(cb);
2431                 interval = 10;
2432         } else if (cb->need_rbld && cb->rbld_first) {
2433                 cb->need_rbld = false;
2434                 dev_dbg(&shost->shost_gendev,
2435                         "get rebuild progress\n");
2436                 myrb_update_rbld_progress(cb);
2437                 interval = 10;
2438         } else if (cb->need_ldev_info) {
2439                 cb->need_ldev_info = false;
2440                 dev_dbg(&shost->shost_gendev,
2441                         "get logical drive info\n");
2442                 myrb_get_ldev_info(cb);
2443                 interval = 10;
2444         } else if (cb->need_rbld) {
2445                 cb->need_rbld = false;
2446                 dev_dbg(&shost->shost_gendev,
2447                         "get rebuild progress\n");
2448                 myrb_update_rbld_progress(cb);
2449                 interval = 10;
2450         } else if (cb->need_cc_status) {
2451                 cb->need_cc_status = false;
2452                 dev_dbg(&shost->shost_gendev,
2453                         "get consistency check progress\n");
2454                 myrb_get_cc_progress(cb);
2455                 interval = 10;
2456         } else if (cb->need_bgi_status) {
2457                 cb->need_bgi_status = false;
2458                 dev_dbg(&shost->shost_gendev, "get background init status\n");
2459                 myrb_bgi_control(cb);
2460                 interval = 10;
2461         } else {
2462                 dev_dbg(&shost->shost_gendev, "new enquiry\n");
2463                 mutex_lock(&cb->dma_mutex);
2464                 myrb_hba_enquiry(cb);
2465                 mutex_unlock(&cb->dma_mutex);
2466                 if ((cb->new_ev_seq - cb->old_ev_seq > 0) ||
2467                     cb->need_err_info || cb->need_rbld ||
2468                     cb->need_ldev_info || cb->need_cc_status ||
2469                     cb->need_bgi_status) {
2470                         dev_dbg(&shost->shost_gendev,
2471                                 "reschedule monitor\n");
2472                         interval = 0;
2473                 }
2474         }
2475         if (interval > 1)
2476                 cb->primary_monitor_time = jiffies;
2477         queue_delayed_work(cb->work_q, &cb->monitor_work, interval);
2478 }
2479
2480 /**
2481  * myrb_err_status - reports controller BIOS messages
2482  *
2483  * Controller BIOS messages are passed through the Error Status Register
2484  * when the driver performs the BIOS handshaking.
2485  *
2486  * Return: true for fatal errors and false otherwise.
2487  */
2488 bool myrb_err_status(struct myrb_hba *cb, unsigned char error,
2489                 unsigned char parm0, unsigned char parm1)
2490 {
2491         struct pci_dev *pdev = cb->pdev;
2492
2493         switch (error) {
2494         case 0x00:
2495                 dev_info(&pdev->dev,
2496                          "Physical Device %d:%d Not Responding\n",
2497                          parm1, parm0);
2498                 break;
2499         case 0x08:
2500                 dev_notice(&pdev->dev, "Spinning Up Drives\n");
2501                 break;
2502         case 0x30:
2503                 dev_notice(&pdev->dev, "Configuration Checksum Error\n");
2504                 break;
2505         case 0x60:
2506                 dev_notice(&pdev->dev, "Mirror Race Recovery Failed\n");
2507                 break;
2508         case 0x70:
2509                 dev_notice(&pdev->dev, "Mirror Race Recovery In Progress\n");
2510                 break;
2511         case 0x90:
2512                 dev_notice(&pdev->dev, "Physical Device %d:%d COD Mismatch\n",
2513                            parm1, parm0);
2514                 break;
2515         case 0xA0:
2516                 dev_notice(&pdev->dev, "Logical Drive Installation Aborted\n");
2517                 break;
2518         case 0xB0:
2519                 dev_notice(&pdev->dev, "Mirror Race On A Critical Logical Drive\n");
2520                 break;
2521         case 0xD0:
2522                 dev_notice(&pdev->dev, "New Controller Configuration Found\n");
2523                 break;
2524         case 0xF0:
2525                 dev_err(&pdev->dev, "Fatal Memory Parity Error\n");
2526                 return true;
2527         default:
2528                 dev_err(&pdev->dev, "Unknown Initialization Error %02X\n",
2529                         error);
2530                 return true;
2531         }
2532         return false;
2533 }
2534
2535 /*
2536  * Hardware-specific functions
2537  */
2538
2539 /*
2540  * DAC960 LA Series Controllers
2541  */
2542
2543 static inline void DAC960_LA_hw_mbox_new_cmd(void __iomem *base)
2544 {
2545         writeb(DAC960_LA_IDB_HWMBOX_NEW_CMD, base + DAC960_LA_IDB_OFFSET);
2546 }
2547
2548 static inline void DAC960_LA_ack_hw_mbox_status(void __iomem *base)
2549 {
2550         writeb(DAC960_LA_IDB_HWMBOX_ACK_STS, base + DAC960_LA_IDB_OFFSET);
2551 }
2552
2553 static inline void DAC960_LA_gen_intr(void __iomem *base)
2554 {
2555         writeb(DAC960_LA_IDB_GEN_IRQ, base + DAC960_LA_IDB_OFFSET);
2556 }
2557
2558 static inline void DAC960_LA_reset_ctrl(void __iomem *base)
2559 {
2560         writeb(DAC960_LA_IDB_CTRL_RESET, base + DAC960_LA_IDB_OFFSET);
2561 }
2562
2563 static inline void DAC960_LA_mem_mbox_new_cmd(void __iomem *base)
2564 {
2565         writeb(DAC960_LA_IDB_MMBOX_NEW_CMD, base + DAC960_LA_IDB_OFFSET);
2566 }
2567
2568 static inline bool DAC960_LA_hw_mbox_is_full(void __iomem *base)
2569 {
2570         unsigned char idb = readb(base + DAC960_LA_IDB_OFFSET);
2571
2572         return !(idb & DAC960_LA_IDB_HWMBOX_EMPTY);
2573 }
2574
2575 static inline bool DAC960_LA_init_in_progress(void __iomem *base)
2576 {
2577         unsigned char idb = readb(base + DAC960_LA_IDB_OFFSET);
2578
2579         return !(idb & DAC960_LA_IDB_INIT_DONE);
2580 }
2581
2582 static inline void DAC960_LA_ack_hw_mbox_intr(void __iomem *base)
2583 {
2584         writeb(DAC960_LA_ODB_HWMBOX_ACK_IRQ, base + DAC960_LA_ODB_OFFSET);
2585 }
2586
2587 static inline void DAC960_LA_ack_mem_mbox_intr(void __iomem *base)
2588 {
2589         writeb(DAC960_LA_ODB_MMBOX_ACK_IRQ, base + DAC960_LA_ODB_OFFSET);
2590 }
2591
2592 static inline void DAC960_LA_ack_intr(void __iomem *base)
2593 {
2594         writeb(DAC960_LA_ODB_HWMBOX_ACK_IRQ | DAC960_LA_ODB_MMBOX_ACK_IRQ,
2595                base + DAC960_LA_ODB_OFFSET);
2596 }
2597
2598 static inline bool DAC960_LA_hw_mbox_status_available(void __iomem *base)
2599 {
2600         unsigned char odb = readb(base + DAC960_LA_ODB_OFFSET);
2601
2602         return odb & DAC960_LA_ODB_HWMBOX_STS_AVAIL;
2603 }
2604
2605 static inline bool DAC960_LA_mem_mbox_status_available(void __iomem *base)
2606 {
2607         unsigned char odb = readb(base + DAC960_LA_ODB_OFFSET);
2608
2609         return odb & DAC960_LA_ODB_MMBOX_STS_AVAIL;
2610 }
2611
2612 static inline void DAC960_LA_enable_intr(void __iomem *base)
2613 {
2614         unsigned char odb = 0xFF;
2615
2616         odb &= ~DAC960_LA_IRQMASK_DISABLE_IRQ;
2617         writeb(odb, base + DAC960_LA_IRQMASK_OFFSET);
2618 }
2619
2620 static inline void DAC960_LA_disable_intr(void __iomem *base)
2621 {
2622         unsigned char odb = 0xFF;
2623
2624         odb |= DAC960_LA_IRQMASK_DISABLE_IRQ;
2625         writeb(odb, base + DAC960_LA_IRQMASK_OFFSET);
2626 }
2627
2628 static inline bool DAC960_LA_intr_enabled(void __iomem *base)
2629 {
2630         unsigned char imask = readb(base + DAC960_LA_IRQMASK_OFFSET);
2631
2632         return !(imask & DAC960_LA_IRQMASK_DISABLE_IRQ);
2633 }
2634
2635 static inline void DAC960_LA_write_cmd_mbox(union myrb_cmd_mbox *mem_mbox,
2636                 union myrb_cmd_mbox *mbox)
2637 {
2638         mem_mbox->words[1] = mbox->words[1];
2639         mem_mbox->words[2] = mbox->words[2];
2640         mem_mbox->words[3] = mbox->words[3];
2641         /* Memory barrier to prevent reordering */
2642         wmb();
2643         mem_mbox->words[0] = mbox->words[0];
2644         /* Memory barrier to force PCI access */
2645         mb();
2646 }
2647
2648 static inline void DAC960_LA_write_hw_mbox(void __iomem *base,
2649                 union myrb_cmd_mbox *mbox)
2650 {
2651         writel(mbox->words[0], base + DAC960_LA_CMDOP_OFFSET);
2652         writel(mbox->words[1], base + DAC960_LA_MBOX4_OFFSET);
2653         writel(mbox->words[2], base + DAC960_LA_MBOX8_OFFSET);
2654         writeb(mbox->bytes[12], base + DAC960_LA_MBOX12_OFFSET);
2655 }
2656
2657 static inline unsigned char DAC960_LA_read_status_cmd_ident(void __iomem *base)
2658 {
2659         return readb(base + DAC960_LA_STSID_OFFSET);
2660 }
2661
2662 static inline unsigned short DAC960_LA_read_status(void __iomem *base)
2663 {
2664         return readw(base + DAC960_LA_STS_OFFSET);
2665 }
2666
2667 static inline bool
2668 DAC960_LA_read_error_status(void __iomem *base, unsigned char *error,
2669                 unsigned char *param0, unsigned char *param1)
2670 {
2671         unsigned char errsts = readb(base + DAC960_LA_ERRSTS_OFFSET);
2672
2673         if (!(errsts & DAC960_LA_ERRSTS_PENDING))
2674                 return false;
2675         errsts &= ~DAC960_LA_ERRSTS_PENDING;
2676
2677         *error = errsts;
2678         *param0 = readb(base + DAC960_LA_CMDOP_OFFSET);
2679         *param1 = readb(base + DAC960_LA_CMDID_OFFSET);
2680         writeb(0xFF, base + DAC960_LA_ERRSTS_OFFSET);
2681         return true;
2682 }
2683
2684 static inline unsigned short
2685 DAC960_LA_mbox_init(struct pci_dev *pdev, void __iomem *base,
2686                 union myrb_cmd_mbox *mbox)
2687 {
2688         unsigned short status;
2689         int timeout = 0;
2690
2691         while (timeout < MYRB_MAILBOX_TIMEOUT) {
2692                 if (!DAC960_LA_hw_mbox_is_full(base))
2693                         break;
2694                 udelay(10);
2695                 timeout++;
2696         }
2697         if (DAC960_LA_hw_mbox_is_full(base)) {
2698                 dev_err(&pdev->dev,
2699                         "Timeout waiting for empty mailbox\n");
2700                 return MYRB_STATUS_SUBSYS_TIMEOUT;
2701         }
2702         DAC960_LA_write_hw_mbox(base, mbox);
2703         DAC960_LA_hw_mbox_new_cmd(base);
2704         timeout = 0;
2705         while (timeout < MYRB_MAILBOX_TIMEOUT) {
2706                 if (DAC960_LA_hw_mbox_status_available(base))
2707                         break;
2708                 udelay(10);
2709                 timeout++;
2710         }
2711         if (!DAC960_LA_hw_mbox_status_available(base)) {
2712                 dev_err(&pdev->dev, "Timeout waiting for mailbox status\n");
2713                 return MYRB_STATUS_SUBSYS_TIMEOUT;
2714         }
2715         status = DAC960_LA_read_status(base);
2716         DAC960_LA_ack_hw_mbox_intr(base);
2717         DAC960_LA_ack_hw_mbox_status(base);
2718
2719         return status;
2720 }
2721
2722 static int DAC960_LA_hw_init(struct pci_dev *pdev,
2723                 struct myrb_hba *cb, void __iomem *base)
2724 {
2725         int timeout = 0;
2726         unsigned char error, parm0, parm1;
2727
2728         DAC960_LA_disable_intr(base);
2729         DAC960_LA_ack_hw_mbox_status(base);
2730         udelay(1000);
2731         timeout = 0;
2732         while (DAC960_LA_init_in_progress(base) &&
2733                timeout < MYRB_MAILBOX_TIMEOUT) {
2734                 if (DAC960_LA_read_error_status(base, &error,
2735                                               &parm0, &parm1) &&
2736                     myrb_err_status(cb, error, parm0, parm1))
2737                         return -ENODEV;
2738                 udelay(10);
2739                 timeout++;
2740         }
2741         if (timeout == MYRB_MAILBOX_TIMEOUT) {
2742                 dev_err(&pdev->dev,
2743                         "Timeout waiting for Controller Initialisation\n");
2744                 return -ETIMEDOUT;
2745         }
2746         if (!myrb_enable_mmio(cb, DAC960_LA_mbox_init)) {
2747                 dev_err(&pdev->dev,
2748                         "Unable to Enable Memory Mailbox Interface\n");
2749                 DAC960_LA_reset_ctrl(base);
2750                 return -ENODEV;
2751         }
2752         DAC960_LA_enable_intr(base);
2753         cb->qcmd = myrb_qcmd;
2754         cb->write_cmd_mbox = DAC960_LA_write_cmd_mbox;
2755         if (cb->dual_mode_interface)
2756                 cb->get_cmd_mbox = DAC960_LA_mem_mbox_new_cmd;
2757         else
2758                 cb->get_cmd_mbox = DAC960_LA_hw_mbox_new_cmd;
2759         cb->disable_intr = DAC960_LA_disable_intr;
2760         cb->reset = DAC960_LA_reset_ctrl;
2761
2762         return 0;
2763 }
2764
2765 static irqreturn_t DAC960_LA_intr_handler(int irq, void *arg)
2766 {
2767         struct myrb_hba *cb = arg;
2768         void __iomem *base = cb->io_base;
2769         struct myrb_stat_mbox *next_stat_mbox;
2770         unsigned long flags;
2771
2772         spin_lock_irqsave(&cb->queue_lock, flags);
2773         DAC960_LA_ack_intr(base);
2774         next_stat_mbox = cb->next_stat_mbox;
2775         while (next_stat_mbox->valid) {
2776                 unsigned char id = next_stat_mbox->id;
2777                 struct scsi_cmnd *scmd = NULL;
2778                 struct myrb_cmdblk *cmd_blk = NULL;
2779
2780                 if (id == MYRB_DCMD_TAG)
2781                         cmd_blk = &cb->dcmd_blk;
2782                 else if (id == MYRB_MCMD_TAG)
2783                         cmd_blk = &cb->mcmd_blk;
2784                 else {
2785                         scmd = scsi_host_find_tag(cb->host, id - 3);
2786                         if (scmd)
2787                                 cmd_blk = scsi_cmd_priv(scmd);
2788                 }
2789                 if (cmd_blk)
2790                         cmd_blk->status = next_stat_mbox->status;
2791                 else
2792                         dev_err(&cb->pdev->dev,
2793                                 "Unhandled command completion %d\n", id);
2794
2795                 memset(next_stat_mbox, 0, sizeof(struct myrb_stat_mbox));
2796                 if (++next_stat_mbox > cb->last_stat_mbox)
2797                         next_stat_mbox = cb->first_stat_mbox;
2798
2799                 if (cmd_blk) {
2800                         if (id < 3)
2801                                 myrb_handle_cmdblk(cb, cmd_blk);
2802                         else
2803                                 myrb_handle_scsi(cb, cmd_blk, scmd);
2804                 }
2805         }
2806         cb->next_stat_mbox = next_stat_mbox;
2807         spin_unlock_irqrestore(&cb->queue_lock, flags);
2808         return IRQ_HANDLED;
2809 }
2810
2811 struct myrb_privdata DAC960_LA_privdata = {
2812         .hw_init =      DAC960_LA_hw_init,
2813         .irq_handler =  DAC960_LA_intr_handler,
2814         .mmio_size =    DAC960_LA_mmio_size,
2815 };
2816
2817 /*
2818  * DAC960 PG Series Controllers
2819  */
2820 static inline void DAC960_PG_hw_mbox_new_cmd(void __iomem *base)
2821 {
2822         writel(DAC960_PG_IDB_HWMBOX_NEW_CMD, base + DAC960_PG_IDB_OFFSET);
2823 }
2824
2825 static inline void DAC960_PG_ack_hw_mbox_status(void __iomem *base)
2826 {
2827         writel(DAC960_PG_IDB_HWMBOX_ACK_STS, base + DAC960_PG_IDB_OFFSET);
2828 }
2829
2830 static inline void DAC960_PG_gen_intr(void __iomem *base)
2831 {
2832         writel(DAC960_PG_IDB_GEN_IRQ, base + DAC960_PG_IDB_OFFSET);
2833 }
2834
2835 static inline void DAC960_PG_reset_ctrl(void __iomem *base)
2836 {
2837         writel(DAC960_PG_IDB_CTRL_RESET, base + DAC960_PG_IDB_OFFSET);
2838 }
2839
2840 static inline void DAC960_PG_mem_mbox_new_cmd(void __iomem *base)
2841 {
2842         writel(DAC960_PG_IDB_MMBOX_NEW_CMD, base + DAC960_PG_IDB_OFFSET);
2843 }
2844
2845 static inline bool DAC960_PG_hw_mbox_is_full(void __iomem *base)
2846 {
2847         unsigned char idb = readl(base + DAC960_PG_IDB_OFFSET);
2848
2849         return idb & DAC960_PG_IDB_HWMBOX_FULL;
2850 }
2851
2852 static inline bool DAC960_PG_init_in_progress(void __iomem *base)
2853 {
2854         unsigned char idb = readl(base + DAC960_PG_IDB_OFFSET);
2855
2856         return idb & DAC960_PG_IDB_INIT_IN_PROGRESS;
2857 }
2858
2859 static inline void DAC960_PG_ack_hw_mbox_intr(void __iomem *base)
2860 {
2861         writel(DAC960_PG_ODB_HWMBOX_ACK_IRQ, base + DAC960_PG_ODB_OFFSET);
2862 }
2863
2864 static inline void DAC960_PG_ack_mem_mbox_intr(void __iomem *base)
2865 {
2866         writel(DAC960_PG_ODB_MMBOX_ACK_IRQ, base + DAC960_PG_ODB_OFFSET);
2867 }
2868
2869 static inline void DAC960_PG_ack_intr(void __iomem *base)
2870 {
2871         writel(DAC960_PG_ODB_HWMBOX_ACK_IRQ | DAC960_PG_ODB_MMBOX_ACK_IRQ,
2872                base + DAC960_PG_ODB_OFFSET);
2873 }
2874
2875 static inline bool DAC960_PG_hw_mbox_status_available(void __iomem *base)
2876 {
2877         unsigned char odb = readl(base + DAC960_PG_ODB_OFFSET);
2878
2879         return odb & DAC960_PG_ODB_HWMBOX_STS_AVAIL;
2880 }
2881
2882 static inline bool DAC960_PG_mem_mbox_status_available(void __iomem *base)
2883 {
2884         unsigned char odb = readl(base + DAC960_PG_ODB_OFFSET);
2885
2886         return odb & DAC960_PG_ODB_MMBOX_STS_AVAIL;
2887 }
2888
2889 static inline void DAC960_PG_enable_intr(void __iomem *base)
2890 {
2891         unsigned int imask = (unsigned int)-1;
2892
2893         imask &= ~DAC960_PG_IRQMASK_DISABLE_IRQ;
2894         writel(imask, base + DAC960_PG_IRQMASK_OFFSET);
2895 }
2896
2897 static inline void DAC960_PG_disable_intr(void __iomem *base)
2898 {
2899         unsigned int imask = (unsigned int)-1;
2900
2901         writel(imask, base + DAC960_PG_IRQMASK_OFFSET);
2902 }
2903
2904 static inline bool DAC960_PG_intr_enabled(void __iomem *base)
2905 {
2906         unsigned int imask = readl(base + DAC960_PG_IRQMASK_OFFSET);
2907
2908         return !(imask & DAC960_PG_IRQMASK_DISABLE_IRQ);
2909 }
2910
2911 static inline void DAC960_PG_write_cmd_mbox(union myrb_cmd_mbox *mem_mbox,
2912                 union myrb_cmd_mbox *mbox)
2913 {
2914         mem_mbox->words[1] = mbox->words[1];
2915         mem_mbox->words[2] = mbox->words[2];
2916         mem_mbox->words[3] = mbox->words[3];
2917         /* Memory barrier to prevent reordering */
2918         wmb();
2919         mem_mbox->words[0] = mbox->words[0];
2920         /* Memory barrier to force PCI access */
2921         mb();
2922 }
2923
2924 static inline void DAC960_PG_write_hw_mbox(void __iomem *base,
2925                 union myrb_cmd_mbox *mbox)
2926 {
2927         writel(mbox->words[0], base + DAC960_PG_CMDOP_OFFSET);
2928         writel(mbox->words[1], base + DAC960_PG_MBOX4_OFFSET);
2929         writel(mbox->words[2], base + DAC960_PG_MBOX8_OFFSET);
2930         writeb(mbox->bytes[12], base + DAC960_PG_MBOX12_OFFSET);
2931 }
2932
2933 static inline unsigned char
2934 DAC960_PG_read_status_cmd_ident(void __iomem *base)
2935 {
2936         return readb(base + DAC960_PG_STSID_OFFSET);
2937 }
2938
2939 static inline unsigned short
2940 DAC960_PG_read_status(void __iomem *base)
2941 {
2942         return readw(base + DAC960_PG_STS_OFFSET);
2943 }
2944
2945 static inline bool
2946 DAC960_PG_read_error_status(void __iomem *base, unsigned char *error,
2947                 unsigned char *param0, unsigned char *param1)
2948 {
2949         unsigned char errsts = readb(base + DAC960_PG_ERRSTS_OFFSET);
2950
2951         if (!(errsts & DAC960_PG_ERRSTS_PENDING))
2952                 return false;
2953         errsts &= ~DAC960_PG_ERRSTS_PENDING;
2954         *error = errsts;
2955         *param0 = readb(base + DAC960_PG_CMDOP_OFFSET);
2956         *param1 = readb(base + DAC960_PG_CMDID_OFFSET);
2957         writeb(0, base + DAC960_PG_ERRSTS_OFFSET);
2958         return true;
2959 }
2960
2961 static inline unsigned short
2962 DAC960_PG_mbox_init(struct pci_dev *pdev, void __iomem *base,
2963                 union myrb_cmd_mbox *mbox)
2964 {
2965         unsigned short status;
2966         int timeout = 0;
2967
2968         while (timeout < MYRB_MAILBOX_TIMEOUT) {
2969                 if (!DAC960_PG_hw_mbox_is_full(base))
2970                         break;
2971                 udelay(10);
2972                 timeout++;
2973         }
2974         if (DAC960_PG_hw_mbox_is_full(base)) {
2975                 dev_err(&pdev->dev,
2976                         "Timeout waiting for empty mailbox\n");
2977                 return MYRB_STATUS_SUBSYS_TIMEOUT;
2978         }
2979         DAC960_PG_write_hw_mbox(base, mbox);
2980         DAC960_PG_hw_mbox_new_cmd(base);
2981
2982         timeout = 0;
2983         while (timeout < MYRB_MAILBOX_TIMEOUT) {
2984                 if (DAC960_PG_hw_mbox_status_available(base))
2985                         break;
2986                 udelay(10);
2987                 timeout++;
2988         }
2989         if (!DAC960_PG_hw_mbox_status_available(base)) {
2990                 dev_err(&pdev->dev,
2991                         "Timeout waiting for mailbox status\n");
2992                 return MYRB_STATUS_SUBSYS_TIMEOUT;
2993         }
2994         status = DAC960_PG_read_status(base);
2995         DAC960_PG_ack_hw_mbox_intr(base);
2996         DAC960_PG_ack_hw_mbox_status(base);
2997
2998         return status;
2999 }
3000
3001 static int DAC960_PG_hw_init(struct pci_dev *pdev,
3002                 struct myrb_hba *cb, void __iomem *base)
3003 {
3004         int timeout = 0;
3005         unsigned char error, parm0, parm1;
3006
3007         DAC960_PG_disable_intr(base);
3008         DAC960_PG_ack_hw_mbox_status(base);
3009         udelay(1000);
3010         while (DAC960_PG_init_in_progress(base) &&
3011                timeout < MYRB_MAILBOX_TIMEOUT) {
3012                 if (DAC960_PG_read_error_status(base, &error,
3013                                                 &parm0, &parm1) &&
3014                     myrb_err_status(cb, error, parm0, parm1))
3015                         return -EIO;
3016                 udelay(10);
3017                 timeout++;
3018         }
3019         if (timeout == MYRB_MAILBOX_TIMEOUT) {
3020                 dev_err(&pdev->dev,
3021                         "Timeout waiting for Controller Initialisation\n");
3022                 return -ETIMEDOUT;
3023         }
3024         if (!myrb_enable_mmio(cb, DAC960_PG_mbox_init)) {
3025                 dev_err(&pdev->dev,
3026                         "Unable to Enable Memory Mailbox Interface\n");
3027                 DAC960_PG_reset_ctrl(base);
3028                 return -ENODEV;
3029         }
3030         DAC960_PG_enable_intr(base);
3031         cb->qcmd = myrb_qcmd;
3032         cb->write_cmd_mbox = DAC960_PG_write_cmd_mbox;
3033         if (cb->dual_mode_interface)
3034                 cb->get_cmd_mbox = DAC960_PG_mem_mbox_new_cmd;
3035         else
3036                 cb->get_cmd_mbox = DAC960_PG_hw_mbox_new_cmd;
3037         cb->disable_intr = DAC960_PG_disable_intr;
3038         cb->reset = DAC960_PG_reset_ctrl;
3039
3040         return 0;
3041 }
3042
3043 static irqreturn_t DAC960_PG_intr_handler(int irq, void *arg)
3044 {
3045         struct myrb_hba *cb = arg;
3046         void __iomem *base = cb->io_base;
3047         struct myrb_stat_mbox *next_stat_mbox;
3048         unsigned long flags;
3049
3050         spin_lock_irqsave(&cb->queue_lock, flags);
3051         DAC960_PG_ack_intr(base);
3052         next_stat_mbox = cb->next_stat_mbox;
3053         while (next_stat_mbox->valid) {
3054                 unsigned char id = next_stat_mbox->id;
3055                 struct scsi_cmnd *scmd = NULL;
3056                 struct myrb_cmdblk *cmd_blk = NULL;
3057
3058                 if (id == MYRB_DCMD_TAG)
3059                         cmd_blk = &cb->dcmd_blk;
3060                 else if (id == MYRB_MCMD_TAG)
3061                         cmd_blk = &cb->mcmd_blk;
3062                 else {
3063                         scmd = scsi_host_find_tag(cb->host, id - 3);
3064                         if (scmd)
3065                                 cmd_blk = scsi_cmd_priv(scmd);
3066                 }
3067                 if (cmd_blk)
3068                         cmd_blk->status = next_stat_mbox->status;
3069                 else
3070                         dev_err(&cb->pdev->dev,
3071                                 "Unhandled command completion %d\n", id);
3072
3073                 memset(next_stat_mbox, 0, sizeof(struct myrb_stat_mbox));
3074                 if (++next_stat_mbox > cb->last_stat_mbox)
3075                         next_stat_mbox = cb->first_stat_mbox;
3076
3077                 if (id < 3)
3078                         myrb_handle_cmdblk(cb, cmd_blk);
3079                 else
3080                         myrb_handle_scsi(cb, cmd_blk, scmd);
3081         }
3082         cb->next_stat_mbox = next_stat_mbox;
3083         spin_unlock_irqrestore(&cb->queue_lock, flags);
3084         return IRQ_HANDLED;
3085 }
3086
3087 struct myrb_privdata DAC960_PG_privdata = {
3088         .hw_init =      DAC960_PG_hw_init,
3089         .irq_handler =  DAC960_PG_intr_handler,
3090         .mmio_size =    DAC960_PG_mmio_size,
3091 };
3092
3093
3094 /*
3095  * DAC960 PD Series Controllers
3096  */
3097
3098 static inline void DAC960_PD_hw_mbox_new_cmd(void __iomem *base)
3099 {
3100         writeb(DAC960_PD_IDB_HWMBOX_NEW_CMD, base + DAC960_PD_IDB_OFFSET);
3101 }
3102
3103 static inline void DAC960_PD_ack_hw_mbox_status(void __iomem *base)
3104 {
3105         writeb(DAC960_PD_IDB_HWMBOX_ACK_STS, base + DAC960_PD_IDB_OFFSET);
3106 }
3107
3108 static inline void DAC960_PD_gen_intr(void __iomem *base)
3109 {
3110         writeb(DAC960_PD_IDB_GEN_IRQ, base + DAC960_PD_IDB_OFFSET);
3111 }
3112
3113 static inline void DAC960_PD_reset_ctrl(void __iomem *base)
3114 {
3115         writeb(DAC960_PD_IDB_CTRL_RESET, base + DAC960_PD_IDB_OFFSET);
3116 }
3117
3118 static inline bool DAC960_PD_hw_mbox_is_full(void __iomem *base)
3119 {
3120         unsigned char idb = readb(base + DAC960_PD_IDB_OFFSET);
3121
3122         return idb & DAC960_PD_IDB_HWMBOX_FULL;
3123 }
3124
3125 static inline bool DAC960_PD_init_in_progress(void __iomem *base)
3126 {
3127         unsigned char idb = readb(base + DAC960_PD_IDB_OFFSET);
3128
3129         return idb & DAC960_PD_IDB_INIT_IN_PROGRESS;
3130 }
3131
3132 static inline void DAC960_PD_ack_intr(void __iomem *base)
3133 {
3134         writeb(DAC960_PD_ODB_HWMBOX_ACK_IRQ, base + DAC960_PD_ODB_OFFSET);
3135 }
3136
3137 static inline bool DAC960_PD_hw_mbox_status_available(void __iomem *base)
3138 {
3139         unsigned char odb = readb(base + DAC960_PD_ODB_OFFSET);
3140
3141         return odb & DAC960_PD_ODB_HWMBOX_STS_AVAIL;
3142 }
3143
3144 static inline void DAC960_PD_enable_intr(void __iomem *base)
3145 {
3146         writeb(DAC960_PD_IRQMASK_ENABLE_IRQ, base + DAC960_PD_IRQEN_OFFSET);
3147 }
3148
3149 static inline void DAC960_PD_disable_intr(void __iomem *base)
3150 {
3151         writeb(0, base + DAC960_PD_IRQEN_OFFSET);
3152 }
3153
3154 static inline bool DAC960_PD_intr_enabled(void __iomem *base)
3155 {
3156         unsigned char imask = readb(base + DAC960_PD_IRQEN_OFFSET);
3157
3158         return imask & DAC960_PD_IRQMASK_ENABLE_IRQ;
3159 }
3160
3161 static inline void DAC960_PD_write_cmd_mbox(void __iomem *base,
3162                 union myrb_cmd_mbox *mbox)
3163 {
3164         writel(mbox->words[0], base + DAC960_PD_CMDOP_OFFSET);
3165         writel(mbox->words[1], base + DAC960_PD_MBOX4_OFFSET);
3166         writel(mbox->words[2], base + DAC960_PD_MBOX8_OFFSET);
3167         writeb(mbox->bytes[12], base + DAC960_PD_MBOX12_OFFSET);
3168 }
3169
3170 static inline unsigned char
3171 DAC960_PD_read_status_cmd_ident(void __iomem *base)
3172 {
3173         return readb(base + DAC960_PD_STSID_OFFSET);
3174 }
3175
3176 static inline unsigned short
3177 DAC960_PD_read_status(void __iomem *base)
3178 {
3179         return readw(base + DAC960_PD_STS_OFFSET);
3180 }
3181
3182 static inline bool
3183 DAC960_PD_read_error_status(void __iomem *base, unsigned char *error,
3184                 unsigned char *param0, unsigned char *param1)
3185 {
3186         unsigned char errsts = readb(base + DAC960_PD_ERRSTS_OFFSET);
3187
3188         if (!(errsts & DAC960_PD_ERRSTS_PENDING))
3189                 return false;
3190         errsts &= ~DAC960_PD_ERRSTS_PENDING;
3191         *error = errsts;
3192         *param0 = readb(base + DAC960_PD_CMDOP_OFFSET);
3193         *param1 = readb(base + DAC960_PD_CMDID_OFFSET);
3194         writeb(0, base + DAC960_PD_ERRSTS_OFFSET);
3195         return true;
3196 }
3197
3198 static void DAC960_PD_qcmd(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk)
3199 {
3200         void __iomem *base = cb->io_base;
3201         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
3202
3203         while (DAC960_PD_hw_mbox_is_full(base))
3204                 udelay(1);
3205         DAC960_PD_write_cmd_mbox(base, mbox);
3206         DAC960_PD_hw_mbox_new_cmd(base);
3207 }
3208
3209 static int DAC960_PD_hw_init(struct pci_dev *pdev,
3210                 struct myrb_hba *cb, void __iomem *base)
3211 {
3212         int timeout = 0;
3213         unsigned char error, parm0, parm1;
3214
3215         if (!request_region(cb->io_addr, 0x80, "myrb")) {
3216                 dev_err(&pdev->dev, "IO port 0x%lx busy\n",
3217                         (unsigned long)cb->io_addr);
3218                 return -EBUSY;
3219         }
3220         DAC960_PD_disable_intr(base);
3221         DAC960_PD_ack_hw_mbox_status(base);
3222         udelay(1000);
3223         while (DAC960_PD_init_in_progress(base) &&
3224                timeout < MYRB_MAILBOX_TIMEOUT) {
3225                 if (DAC960_PD_read_error_status(base, &error,
3226                                               &parm0, &parm1) &&
3227                     myrb_err_status(cb, error, parm0, parm1))
3228                         return -EIO;
3229                 udelay(10);
3230                 timeout++;
3231         }
3232         if (timeout == MYRB_MAILBOX_TIMEOUT) {
3233                 dev_err(&pdev->dev,
3234                         "Timeout waiting for Controller Initialisation\n");
3235                 return -ETIMEDOUT;
3236         }
3237         if (!myrb_enable_mmio(cb, NULL)) {
3238                 dev_err(&pdev->dev,
3239                         "Unable to Enable Memory Mailbox Interface\n");
3240                 DAC960_PD_reset_ctrl(base);
3241                 return -ENODEV;
3242         }
3243         DAC960_PD_enable_intr(base);
3244         cb->qcmd = DAC960_PD_qcmd;
3245         cb->disable_intr = DAC960_PD_disable_intr;
3246         cb->reset = DAC960_PD_reset_ctrl;
3247
3248         return 0;
3249 }
3250
3251 static irqreturn_t DAC960_PD_intr_handler(int irq, void *arg)
3252 {
3253         struct myrb_hba *cb = arg;
3254         void __iomem *base = cb->io_base;
3255         unsigned long flags;
3256
3257         spin_lock_irqsave(&cb->queue_lock, flags);
3258         while (DAC960_PD_hw_mbox_status_available(base)) {
3259                 unsigned char id = DAC960_PD_read_status_cmd_ident(base);
3260                 struct scsi_cmnd *scmd = NULL;
3261                 struct myrb_cmdblk *cmd_blk = NULL;
3262
3263                 if (id == MYRB_DCMD_TAG)
3264                         cmd_blk = &cb->dcmd_blk;
3265                 else if (id == MYRB_MCMD_TAG)
3266                         cmd_blk = &cb->mcmd_blk;
3267                 else {
3268                         scmd = scsi_host_find_tag(cb->host, id - 3);
3269                         if (scmd)
3270                                 cmd_blk = scsi_cmd_priv(scmd);
3271                 }
3272                 if (cmd_blk)
3273                         cmd_blk->status = DAC960_PD_read_status(base);
3274                 else
3275                         dev_err(&cb->pdev->dev,
3276                                 "Unhandled command completion %d\n", id);
3277
3278                 DAC960_PD_ack_intr(base);
3279                 DAC960_PD_ack_hw_mbox_status(base);
3280
3281                 if (id < 3)
3282                         myrb_handle_cmdblk(cb, cmd_blk);
3283                 else
3284                         myrb_handle_scsi(cb, cmd_blk, scmd);
3285         }
3286         spin_unlock_irqrestore(&cb->queue_lock, flags);
3287         return IRQ_HANDLED;
3288 }
3289
3290 struct myrb_privdata DAC960_PD_privdata = {
3291         .hw_init =      DAC960_PD_hw_init,
3292         .irq_handler =  DAC960_PD_intr_handler,
3293         .mmio_size =    DAC960_PD_mmio_size,
3294 };
3295
3296
3297 /*
3298  * DAC960 P Series Controllers
3299  *
3300  * Similar to the DAC960 PD Series Controllers, but some commands have
3301  * to be translated.
3302  */
3303
3304 static inline void myrb_translate_enquiry(void *enq)
3305 {
3306         memcpy(enq + 132, enq + 36, 64);
3307         memset(enq + 36, 0, 96);
3308 }
3309
3310 static inline void myrb_translate_devstate(void *state)
3311 {
3312         memcpy(state + 2, state + 3, 1);
3313         memmove(state + 4, state + 5, 2);
3314         memmove(state + 6, state + 8, 4);
3315 }
3316
3317 static inline void myrb_translate_to_rw_command(struct myrb_cmdblk *cmd_blk)
3318 {
3319         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
3320         int ldev_num = mbox->type5.ld.ldev_num;
3321
3322         mbox->bytes[3] &= 0x7;
3323         mbox->bytes[3] |= mbox->bytes[7] << 6;
3324         mbox->bytes[7] = ldev_num;
3325 }
3326
3327 static inline void myrb_translate_from_rw_command(struct myrb_cmdblk *cmd_blk)
3328 {
3329         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
3330         int ldev_num = mbox->bytes[7];
3331
3332         mbox->bytes[7] = mbox->bytes[3] >> 6;
3333         mbox->bytes[3] &= 0x7;
3334         mbox->bytes[3] |= ldev_num << 3;
3335 }
3336
3337 static void DAC960_P_qcmd(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk)
3338 {
3339         void __iomem *base = cb->io_base;
3340         union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
3341
3342         switch (mbox->common.opcode) {
3343         case MYRB_CMD_ENQUIRY:
3344                 mbox->common.opcode = MYRB_CMD_ENQUIRY_OLD;
3345                 break;
3346         case MYRB_CMD_GET_DEVICE_STATE:
3347                 mbox->common.opcode = MYRB_CMD_GET_DEVICE_STATE_OLD;
3348                 break;
3349         case MYRB_CMD_READ:
3350                 mbox->common.opcode = MYRB_CMD_READ_OLD;
3351                 myrb_translate_to_rw_command(cmd_blk);
3352                 break;
3353         case MYRB_CMD_WRITE:
3354                 mbox->common.opcode = MYRB_CMD_WRITE_OLD;
3355                 myrb_translate_to_rw_command(cmd_blk);
3356                 break;
3357         case MYRB_CMD_READ_SG:
3358                 mbox->common.opcode = MYRB_CMD_READ_SG_OLD;
3359                 myrb_translate_to_rw_command(cmd_blk);
3360                 break;
3361         case MYRB_CMD_WRITE_SG:
3362                 mbox->common.opcode = MYRB_CMD_WRITE_SG_OLD;
3363                 myrb_translate_to_rw_command(cmd_blk);
3364                 break;
3365         default:
3366                 break;
3367         }
3368         while (DAC960_PD_hw_mbox_is_full(base))
3369                 udelay(1);
3370         DAC960_PD_write_cmd_mbox(base, mbox);
3371         DAC960_PD_hw_mbox_new_cmd(base);
3372 }
3373
3374
3375 static int DAC960_P_hw_init(struct pci_dev *pdev,
3376                 struct myrb_hba *cb, void __iomem *base)
3377 {
3378         int timeout = 0;
3379         unsigned char error, parm0, parm1;
3380
3381         if (!request_region(cb->io_addr, 0x80, "myrb")) {
3382                 dev_err(&pdev->dev, "IO port 0x%lx busy\n",
3383                         (unsigned long)cb->io_addr);
3384                 return -EBUSY;
3385         }
3386         DAC960_PD_disable_intr(base);
3387         DAC960_PD_ack_hw_mbox_status(base);
3388         udelay(1000);
3389         while (DAC960_PD_init_in_progress(base) &&
3390                timeout < MYRB_MAILBOX_TIMEOUT) {
3391                 if (DAC960_PD_read_error_status(base, &error,
3392                                                 &parm0, &parm1) &&
3393                     myrb_err_status(cb, error, parm0, parm1))
3394                         return -EAGAIN;
3395                 udelay(10);
3396                 timeout++;
3397         }
3398         if (timeout == MYRB_MAILBOX_TIMEOUT) {
3399                 dev_err(&pdev->dev,
3400                         "Timeout waiting for Controller Initialisation\n");
3401                 return -ETIMEDOUT;
3402         }
3403         if (!myrb_enable_mmio(cb, NULL)) {
3404                 dev_err(&pdev->dev,
3405                         "Unable to allocate DMA mapped memory\n");
3406                 DAC960_PD_reset_ctrl(base);
3407                 return -ETIMEDOUT;
3408         }
3409         DAC960_PD_enable_intr(base);
3410         cb->qcmd = DAC960_P_qcmd;
3411         cb->disable_intr = DAC960_PD_disable_intr;
3412         cb->reset = DAC960_PD_reset_ctrl;
3413
3414         return 0;
3415 }
3416
3417 static irqreturn_t DAC960_P_intr_handler(int irq, void *arg)
3418 {
3419         struct myrb_hba *cb = arg;
3420         void __iomem *base = cb->io_base;
3421         unsigned long flags;
3422
3423         spin_lock_irqsave(&cb->queue_lock, flags);
3424         while (DAC960_PD_hw_mbox_status_available(base)) {
3425                 unsigned char id = DAC960_PD_read_status_cmd_ident(base);
3426                 struct scsi_cmnd *scmd = NULL;
3427                 struct myrb_cmdblk *cmd_blk = NULL;
3428                 union myrb_cmd_mbox *mbox;
3429                 enum myrb_cmd_opcode op;
3430
3431
3432                 if (id == MYRB_DCMD_TAG)
3433                         cmd_blk = &cb->dcmd_blk;
3434                 else if (id == MYRB_MCMD_TAG)
3435                         cmd_blk = &cb->mcmd_blk;
3436                 else {
3437                         scmd = scsi_host_find_tag(cb->host, id - 3);
3438                         if (scmd)
3439                                 cmd_blk = scsi_cmd_priv(scmd);
3440                 }
3441                 if (cmd_blk)
3442                         cmd_blk->status = DAC960_PD_read_status(base);
3443                 else
3444                         dev_err(&cb->pdev->dev,
3445                                 "Unhandled command completion %d\n", id);
3446
3447                 DAC960_PD_ack_intr(base);
3448                 DAC960_PD_ack_hw_mbox_status(base);
3449
3450                 if (!cmd_blk)
3451                         continue;
3452
3453                 mbox = &cmd_blk->mbox;
3454                 op = mbox->common.opcode;
3455                 switch (op) {
3456                 case MYRB_CMD_ENQUIRY_OLD:
3457                         mbox->common.opcode = MYRB_CMD_ENQUIRY;
3458                         myrb_translate_enquiry(cb->enquiry);
3459                         break;
3460                 case MYRB_CMD_READ_OLD:
3461                         mbox->common.opcode = MYRB_CMD_READ;
3462                         myrb_translate_from_rw_command(cmd_blk);
3463                         break;
3464                 case MYRB_CMD_WRITE_OLD:
3465                         mbox->common.opcode = MYRB_CMD_WRITE;
3466                         myrb_translate_from_rw_command(cmd_blk);
3467                         break;
3468                 case MYRB_CMD_READ_SG_OLD:
3469                         mbox->common.opcode = MYRB_CMD_READ_SG;
3470                         myrb_translate_from_rw_command(cmd_blk);
3471                         break;
3472                 case MYRB_CMD_WRITE_SG_OLD:
3473                         mbox->common.opcode = MYRB_CMD_WRITE_SG;
3474                         myrb_translate_from_rw_command(cmd_blk);
3475                         break;
3476                 default:
3477                         break;
3478                 }
3479                 if (id < 3)
3480                         myrb_handle_cmdblk(cb, cmd_blk);
3481                 else
3482                         myrb_handle_scsi(cb, cmd_blk, scmd);
3483         }
3484         spin_unlock_irqrestore(&cb->queue_lock, flags);
3485         return IRQ_HANDLED;
3486 }
3487
3488 struct myrb_privdata DAC960_P_privdata = {
3489         .hw_init =      DAC960_P_hw_init,
3490         .irq_handler =  DAC960_P_intr_handler,
3491         .mmio_size =    DAC960_PD_mmio_size,
3492 };
3493
3494 static struct myrb_hba *myrb_detect(struct pci_dev *pdev,
3495                 const struct pci_device_id *entry)
3496 {
3497         struct myrb_privdata *privdata =
3498                 (struct myrb_privdata *)entry->driver_data;
3499         irq_handler_t irq_handler = privdata->irq_handler;
3500         unsigned int mmio_size = privdata->mmio_size;
3501         struct Scsi_Host *shost;
3502         struct myrb_hba *cb = NULL;
3503
3504         shost = scsi_host_alloc(&myrb_template, sizeof(struct myrb_hba));
3505         if (!shost) {
3506                 dev_err(&pdev->dev, "Unable to allocate Controller\n");
3507                 return NULL;
3508         }
3509         shost->max_cmd_len = 12;
3510         shost->max_lun = 256;
3511         cb = shost_priv(shost);
3512         mutex_init(&cb->dcmd_mutex);
3513         mutex_init(&cb->dma_mutex);
3514         cb->pdev = pdev;
3515
3516         if (pci_enable_device(pdev))
3517                 goto failure;
3518
3519         if (privdata->hw_init == DAC960_PD_hw_init ||
3520             privdata->hw_init == DAC960_P_hw_init) {
3521                 cb->io_addr = pci_resource_start(pdev, 0);
3522                 cb->pci_addr = pci_resource_start(pdev, 1);
3523         } else
3524                 cb->pci_addr = pci_resource_start(pdev, 0);
3525
3526         pci_set_drvdata(pdev, cb);
3527         spin_lock_init(&cb->queue_lock);
3528         if (mmio_size < PAGE_SIZE)
3529                 mmio_size = PAGE_SIZE;
3530         cb->mmio_base = ioremap_nocache(cb->pci_addr & PAGE_MASK, mmio_size);
3531         if (cb->mmio_base == NULL) {
3532                 dev_err(&pdev->dev,
3533                         "Unable to map Controller Register Window\n");
3534                 goto failure;
3535         }
3536
3537         cb->io_base = cb->mmio_base + (cb->pci_addr & ~PAGE_MASK);
3538         if (privdata->hw_init(pdev, cb, cb->io_base))
3539                 goto failure;
3540
3541         if (request_irq(pdev->irq, irq_handler, IRQF_SHARED, "myrb", cb) < 0) {
3542                 dev_err(&pdev->dev,
3543                         "Unable to acquire IRQ Channel %d\n", pdev->irq);
3544                 goto failure;
3545         }
3546         cb->irq = pdev->irq;
3547         return cb;
3548
3549 failure:
3550         dev_err(&pdev->dev,
3551                 "Failed to initialize Controller\n");
3552         myrb_cleanup(cb);
3553         return NULL;
3554 }
3555
3556 static int myrb_probe(struct pci_dev *dev, const struct pci_device_id *entry)
3557 {
3558         struct myrb_hba *cb;
3559         int ret;
3560
3561         cb = myrb_detect(dev, entry);
3562         if (!cb)
3563                 return -ENODEV;
3564
3565         ret = myrb_get_hba_config(cb);
3566         if (ret < 0) {
3567                 myrb_cleanup(cb);
3568                 return ret;
3569         }
3570
3571         if (!myrb_create_mempools(dev, cb)) {
3572                 ret = -ENOMEM;
3573                 goto failed;
3574         }
3575
3576         ret = scsi_add_host(cb->host, &dev->dev);
3577         if (ret) {
3578                 dev_err(&dev->dev, "scsi_add_host failed with %d\n", ret);
3579                 myrb_destroy_mempools(cb);
3580                 goto failed;
3581         }
3582         scsi_scan_host(cb->host);
3583         return 0;
3584 failed:
3585         myrb_cleanup(cb);
3586         return ret;
3587 }
3588
3589
3590 static void myrb_remove(struct pci_dev *pdev)
3591 {
3592         struct myrb_hba *cb = pci_get_drvdata(pdev);
3593
3594         shost_printk(KERN_NOTICE, cb->host, "Flushing Cache...");
3595         myrb_exec_type3(cb, MYRB_CMD_FLUSH, 0);
3596         myrb_cleanup(cb);
3597         myrb_destroy_mempools(cb);
3598 }
3599
3600
3601 static const struct pci_device_id myrb_id_table[] = {
3602         {
3603                 PCI_DEVICE_SUB(PCI_VENDOR_ID_DEC,
3604                                PCI_DEVICE_ID_DEC_21285,
3605                                PCI_VENDOR_ID_MYLEX,
3606                                PCI_DEVICE_ID_MYLEX_DAC960_LA),
3607                 .driver_data    = (unsigned long) &DAC960_LA_privdata,
3608         },
3609         {
3610                 PCI_DEVICE_DATA(MYLEX, DAC960_PG, &DAC960_PG_privdata),
3611         },
3612         {
3613                 PCI_DEVICE_DATA(MYLEX, DAC960_PD, &DAC960_PD_privdata),
3614         },
3615         {
3616                 PCI_DEVICE_DATA(MYLEX, DAC960_P, &DAC960_P_privdata),
3617         },
3618         {0, },
3619 };
3620
3621 MODULE_DEVICE_TABLE(pci, myrb_id_table);
3622
3623 static struct pci_driver myrb_pci_driver = {
3624         .name           = "myrb",
3625         .id_table       = myrb_id_table,
3626         .probe          = myrb_probe,
3627         .remove         = myrb_remove,
3628 };
3629
3630 static int __init myrb_init_module(void)
3631 {
3632         int ret;
3633
3634         myrb_raid_template = raid_class_attach(&myrb_raid_functions);
3635         if (!myrb_raid_template)
3636                 return -ENODEV;
3637
3638         ret = pci_register_driver(&myrb_pci_driver);
3639         if (ret)
3640                 raid_class_release(myrb_raid_template);
3641
3642         return ret;
3643 }
3644
3645 static void __exit myrb_cleanup_module(void)
3646 {
3647         pci_unregister_driver(&myrb_pci_driver);
3648         raid_class_release(myrb_raid_template);
3649 }
3650
3651 module_init(myrb_init_module);
3652 module_exit(myrb_cleanup_module);
3653
3654 MODULE_DESCRIPTION("Mylex DAC960/AcceleRAID/eXtremeRAID driver (Block interface)");
3655 MODULE_AUTHOR("Hannes Reinecke <hare@suse.com>");
3656 MODULE_LICENSE("GPL");