drivers/block/cciss.c

   1 /*
   2  *    Disk Array driver for HP SA 5xxx and 6xxx Controllers
   3  *    Copyright 2000, 2006 Hewlett-Packard Development Company, L.P.
   4  *
   5  *    This program is free software; you can redistribute it and/or modify
   6  *    it under the terms of the GNU General Public License as published by
   7  *    the Free Software Foundation; either version 2 of the License, or
   8  *    (at your option) any later version.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  14  *
  15  *    You should have received a copy of the GNU General Public License
  16  *    along with this program; if not, write to the Free Software
  17  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
  20  *
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/types.h>
  26 #include <linux/pci.h>
  27 #include <linux/kernel.h>
  28 #include <linux/slab.h>
  29 #include <linux/delay.h>
  30 #include <linux/major.h>
  31 #include <linux/fs.h>
  32 #include <linux/bio.h>
  33 #include <linux/blkpg.h>
  34 #include <linux/timer.h>
  35 #include <linux/proc_fs.h>
  36 #include <linux/init.h>
  37 #include <linux/hdreg.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/compat.h>
  40 #include <linux/blktrace_api.h>
  41 #include <asm/uaccess.h>
  42 #include <asm/io.h>
  43
  44 #include <linux/dma-mapping.h>
  45 #include <linux/blkdev.h>
  46 #include <linux/genhd.h>
  47 #include <linux/completion.h>
  48
  49 #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
  50 #define DRIVER_NAME "HP CISS Driver (v 3.6.14)"
  51 #define DRIVER_VERSION CCISS_DRIVER_VERSION(3,6,14)
  52
  53 /* Embedded module documentation macros - see modules.h */
  54 MODULE_AUTHOR("Hewlett-Packard Company");
  55 MODULE_DESCRIPTION("Driver for HP Controller SA5xxx SA6xxx version 3.6.14");
  56 MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
  57                         " SA6i P600 P800 P400 P400i E200 E200i E500");
  58 MODULE_VERSION("3.6.14");
  59 MODULE_LICENSE("GPL");
  60
  61 #include "cciss_cmd.h"
  62 #include "cciss.h"
  63 #include <linux/cciss_ioctl.h>
  64
  65 /* define the PCI info for the cards we can control */
  66 static const struct pci_device_id cciss_pci_device_id[] = {
  67         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS,  0x0E11, 0x4070},
  68         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
  69         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
  70         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
  71         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
  72         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
  73         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
  74         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
  75         {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
  76         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSA,     0x103C, 0x3225},
  77         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3223},
  78         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3234},
  79         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3235},
  80         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3211},
  81         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3212},
  82         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3213},
  83         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3214},
  84         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSD,     0x103C, 0x3215},
  85         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSC,     0x103C, 0x3233},
  86         {0,}
  87 };
  88
  89 MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
  90
  91 /*  board_id = Subsystem Device ID & Vendor ID
  92  *  product = Marketing Name for the board
  93  *  access = Address of the struct of function pointers
  94  */
  95 static struct board_type products[] = {
  96         {0x40700E11, "Smart Array 5300", &SA5_access},
  97         {0x40800E11, "Smart Array 5i", &SA5B_access},
  98         {0x40820E11, "Smart Array 532", &SA5B_access},
  99         {0x40830E11, "Smart Array 5312", &SA5B_access},
 100         {0x409A0E11, "Smart Array 641", &SA5_access},
 101         {0x409B0E11, "Smart Array 642", &SA5_access},
 102         {0x409C0E11, "Smart Array 6400", &SA5_access},
 103         {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
 104         {0x40910E11, "Smart Array 6i", &SA5_access},
 105         {0x3225103C, "Smart Array P600", &SA5_access},
 106         {0x3223103C, "Smart Array P800", &SA5_access},
 107         {0x3234103C, "Smart Array P400", &SA5_access},
 108         {0x3235103C, "Smart Array P400i", &SA5_access},
 109         {0x3211103C, "Smart Array E200i", &SA5_access},
 110         {0x3212103C, "Smart Array E200", &SA5_access},
 111         {0x3213103C, "Smart Array E200i", &SA5_access},
 112         {0x3214103C, "Smart Array E200i", &SA5_access},
 113         {0x3215103C, "Smart Array E200i", &SA5_access},
 114         {0x3233103C, "Smart Array E500", &SA5_access},
 115 };
 116
 117 /* How long to wait (in milliseconds) for board to go into simple mode */
 118 #define MAX_CONFIG_WAIT 30000
 119 #define MAX_IOCTL_CONFIG_WAIT 1000
 120
 121 /*define how many times we will try a command because of bus resets */
 122 #define MAX_CMD_RETRIES 3
 123
 124 #define READ_AHEAD       1024
 125 #define NR_CMDS          384    /* #commands that can be outstanding */
 126 #define MAX_CTLR        32
 127
 128 /* Originally cciss driver only supports 8 major numbers */
 129 #define MAX_CTLR_ORIG   8
 130
 131 static ctlr_info_t *hba[MAX_CTLR];
 132
 133 static void do_cciss_request(request_queue_t *q);
 134 static irqreturn_t do_cciss_intr(int irq, void *dev_id);
 135 static int cciss_open(struct inode *inode, struct file *filep);
 136 static int cciss_release(struct inode *inode, struct file *filep);
 137 static int cciss_ioctl(struct inode *inode, struct file *filep,
 138                        unsigned int cmd, unsigned long arg);
 139 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
 140
 141 static int revalidate_allvol(ctlr_info_t *host);
 142 static int cciss_revalidate(struct gendisk *disk);
 143 static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk);
 144 static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
 145                            int clear_all);
 146
 147 static void cciss_read_capacity(int ctlr, int logvol, int withirq,
 148                         sector_t *total_size, unsigned int *block_size);
 149 static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
 150                         sector_t *total_size, unsigned int *block_size);
 151 static void cciss_geometry_inquiry(int ctlr, int logvol,
 152                         int withirq, sector_t total_size,
 153                         unsigned int block_size, InquiryData_struct *inq_buff,
 154                                    drive_info_struct *drv);
 155 static void cciss_getgeometry(int cntl_num);
 156 static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
 157                                            __u32);
 158 static void start_io(ctlr_info_t *h);
 159 static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
 160                    unsigned int use_unit_num, unsigned int log_unit,
 161                    __u8 page_code, unsigned char *scsi3addr, int cmd_type);
 162 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
 163                            unsigned int use_unit_num, unsigned int log_unit,
 164                            __u8 page_code, int cmd_type);
 165
 166 static void fail_all_cmds(unsigned long ctlr);
 167
 168 #ifdef CONFIG_PROC_FS
 169 static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
 170                                int length, int *eof, void *data);
 171 static void cciss_procinit(int i);
 172 #else
 173 static void cciss_procinit(int i)
 174 {
 175 }
 176 #endif                          /* CONFIG_PROC_FS */
 177
 178 #ifdef CONFIG_COMPAT
 179 static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
 180 #endif
 181
 182 static struct block_device_operations cciss_fops = {
 183         .owner = THIS_MODULE,
 184         .open = cciss_open,
 185         .release = cciss_release,
 186         .ioctl = cciss_ioctl,
 187         .getgeo = cciss_getgeo,
 188 #ifdef CONFIG_COMPAT
 189         .compat_ioctl = cciss_compat_ioctl,
 190 #endif
 191         .revalidate_disk = cciss_revalidate,
 192 };
 193
 194 /*
 195  * Enqueuing and dequeuing functions for cmdlists.
 196  */
 197 static inline void addQ(CommandList_struct **Qptr, CommandList_struct *c)
 198 {
 199         if (*Qptr == NULL) {
 200                 *Qptr = c;
 201                 c->next = c->prev = c;
 202         } else {
 203                 c->prev = (*Qptr)->prev;
 204                 c->next = (*Qptr);
 205                 (*Qptr)->prev->next = c;
 206                 (*Qptr)->prev = c;
 207         }
 208 }
 209
 210 static inline CommandList_struct *removeQ(CommandList_struct **Qptr,
 211                                           CommandList_struct *c)
 212 {
 213         if (c && c->next != c) {
 214                 if (*Qptr == c)
 215                         *Qptr = c->next;
 216                 c->prev->next = c->next;
 217                 c->next->prev = c->prev;
 218         } else {
 219                 *Qptr = NULL;
 220         }
 221         return c;
 222 }
 223
 224 #include "cciss_scsi.c"         /* For SCSI tape support */
 225
 226 #ifdef CONFIG_PROC_FS
 227
 228 /*
 229  * Report information about this controller.
 230  */
 231 #define ENG_GIG 1000000000
 232 #define ENG_GIG_FACTOR (ENG_GIG/512)
 233 #define RAID_UNKNOWN 6
 234 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 235         "UNKNOWN"
 236 };
 237
 238 static struct proc_dir_entry *proc_cciss;
 239
 240 static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
 241                                int length, int *eof, void *data)
 242 {
 243         off_t pos = 0;
 244         off_t len = 0;
 245         int size, i, ctlr;
 246         ctlr_info_t *h = (ctlr_info_t *) data;
 247         drive_info_struct *drv;
 248         unsigned long flags;
 249         sector_t vol_sz, vol_sz_frac;
 250
 251         ctlr = h->ctlr;
 252
 253         /* prevent displaying bogus info during configuration
 254          * or deconfiguration of a logical volume
 255          */
 256         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
 257         if (h->busy_configuring) {
 258                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 259                 return -EBUSY;
 260         }
 261         h->busy_configuring = 1;
 262         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 263
 264         size = sprintf(buffer, "%s: HP %s Controller\n"
 265                        "Board ID: 0x%08lx\n"
 266                        "Firmware Version: %c%c%c%c\n"
 267                        "IRQ: %d\n"
 268                        "Logical drives: %d\n"
 269                        "Current Q depth: %d\n"
 270                        "Current # commands on controller: %d\n"
 271                        "Max Q depth since init: %d\n"
 272                        "Max # commands on controller since init: %d\n"
 273                        "Max SG entries since init: %d\n\n",
 274                        h->devname,
 275                        h->product_name,
 276                        (unsigned long)h->board_id,
 277                        h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
 278                        h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
 279                        h->num_luns, h->Qdepth, h->commands_outstanding,
 280                        h->maxQsinceinit, h->max_outstanding, h->maxSG);
 281
 282         pos += size;
 283         len += size;
 284         cciss_proc_tape_report(ctlr, buffer, &pos, &len);
 285         for (i = 0; i <= h->highest_lun; i++) {
 286
 287                 drv = &h->drv[i];
 288                 if (drv->heads == 0)
 289                         continue;
 290
 291                 vol_sz = drv->nr_blocks;
 292                 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
 293                 vol_sz_frac *= 100;
 294                 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
 295
 296                 if (drv->raid_level > 5)
 297                         drv->raid_level = RAID_UNKNOWN;
 298                 size = sprintf(buffer + len, "cciss/c%dd%d:"
 299                                "\t%4u.%02uGB\tRAID %s\n",
 300                                ctlr, i, (int)vol_sz, (int)vol_sz_frac,
 301                                raid_label[drv->raid_level]);
 302                 pos += size;
 303                 len += size;
 304         }
 305
 306         *eof = 1;
 307         *start = buffer + offset;
 308         len -= offset;
 309         if (len > length)
 310                 len = length;
 311         h->busy_configuring = 0;
 312         return len;
 313 }
 314
 315 static int
 316 cciss_proc_write(struct file *file, const char __user *buffer,
 317                  unsigned long count, void *data)
 318 {
 319         unsigned char cmd[80];
 320         int len;
 321 #ifdef CONFIG_CISS_SCSI_TAPE
 322         ctlr_info_t *h = (ctlr_info_t *) data;
 323         int rc;
 324 #endif
 325
 326         if (count > sizeof(cmd) - 1)
 327                 return -EINVAL;
 328         if (copy_from_user(cmd, buffer, count))
 329                 return -EFAULT;
 330         cmd[count] = '\0';
 331         len = strlen(cmd);      // above 3 lines ensure safety
 332         if (len && cmd[len - 1] == '\n')
 333                 cmd[--len] = '\0';
 334 #       ifdef CONFIG_CISS_SCSI_TAPE
 335         if (strcmp("engage scsi", cmd) == 0) {
 336                 rc = cciss_engage_scsi(h->ctlr);
 337                 if (rc != 0)
 338                         return -rc;
 339                 return count;
 340         }
 341         /* might be nice to have "disengage" too, but it's not
 342            safely possible. (only 1 module use count, lock issues.) */
 343 #       endif
 344         return -EINVAL;
 345 }
 346
 347 /*
 348  * Get us a file in /proc/cciss that says something about each controller.
 349  * Create /proc/cciss if it doesn't exist yet.
 350  */
 351 static void __devinit cciss_procinit(int i)
 352 {
 353         struct proc_dir_entry *pde;
 354
 355         if (proc_cciss == NULL) {
 356                 proc_cciss = proc_mkdir("cciss", proc_root_driver);
 357                 if (!proc_cciss)
 358                         return;
 359         }
 360
 361         pde = create_proc_read_entry(hba[i]->devname,
 362                                      S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH,
 363                                      proc_cciss, cciss_proc_get_info, hba[i]);
 364         pde->write_proc = cciss_proc_write;
 365 }
 366 #endif                          /* CONFIG_PROC_FS */
 367
 368 /*
 369  * For operations that cannot sleep, a command block is allocated at init,
 370  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
 371  * which ones are free or in use.  For operations that can wait for kmalloc
 372  * to possible sleep, this routine can be called with get_from_pool set to 0.
 373  * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
 374  */
 375 static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
 376 {
 377         CommandList_struct *c;
 378         int i;
 379         u64bit temp64;
 380         dma_addr_t cmd_dma_handle, err_dma_handle;
 381
 382         if (!get_from_pool) {
 383                 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
 384                         sizeof(CommandList_struct), &cmd_dma_handle);
 385                 if (c == NULL)
 386                         return NULL;
 387                 memset(c, 0, sizeof(CommandList_struct));
 388
 389                 c->cmdindex = -1;
 390
 391                 c->err_info = (ErrorInfo_struct *)
 392                     pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
 393                             &err_dma_handle);
 394
 395                 if (c->err_info == NULL) {
 396                         pci_free_consistent(h->pdev,
 397                                 sizeof(CommandList_struct), c, cmd_dma_handle);
 398                         return NULL;
 399                 }
 400                 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
 401         } else {                /* get it out of the controllers pool */
 402
 403                 do {
 404                         i = find_first_zero_bit(h->cmd_pool_bits, NR_CMDS);
 405                         if (i == NR_CMDS)
 406                                 return NULL;
 407                 } while (test_and_set_bit
 408                          (i & (BITS_PER_LONG - 1),
 409                           h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
 410 #ifdef CCISS_DEBUG
 411                 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
 412 #endif
 413                 c = h->cmd_pool + i;
 414                 memset(c, 0, sizeof(CommandList_struct));
 415                 cmd_dma_handle = h->cmd_pool_dhandle
 416                     + i * sizeof(CommandList_struct);
 417                 c->err_info = h->errinfo_pool + i;
 418                 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
 419                 err_dma_handle = h->errinfo_pool_dhandle
 420                     + i * sizeof(ErrorInfo_struct);
 421                 h->nr_allocs++;
 422
 423                 c->cmdindex = i;
 424         }
 425
 426         c->busaddr = (__u32) cmd_dma_handle;
 427         temp64.val = (__u64) err_dma_handle;
 428         c->ErrDesc.Addr.lower = temp64.val32.lower;
 429         c->ErrDesc.Addr.upper = temp64.val32.upper;
 430         c->ErrDesc.Len = sizeof(ErrorInfo_struct);
 431
 432         c->ctlr = h->ctlr;
 433         return c;
 434 }
 435
 436 /*
 437  * Frees a command block that was previously allocated with cmd_alloc().
 438  */
 439 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
 440 {
 441         int i;
 442         u64bit temp64;
 443
 444         if (!got_from_pool) {
 445                 temp64.val32.lower = c->ErrDesc.Addr.lower;
 446                 temp64.val32.upper = c->ErrDesc.Addr.upper;
 447                 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
 448                                     c->err_info, (dma_addr_t) temp64.val);
 449                 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
 450                                     c, (dma_addr_t) c->busaddr);
 451         } else {
 452                 i = c - h->cmd_pool;
 453                 clear_bit(i & (BITS_PER_LONG - 1),
 454                           h->cmd_pool_bits + (i / BITS_PER_LONG));
 455                 h->nr_frees++;
 456         }
 457 }
 458
 459 static inline ctlr_info_t *get_host(struct gendisk *disk)
 460 {
 461         return disk->queue->queuedata;
 462 }
 463
 464 static inline drive_info_struct *get_drv(struct gendisk *disk)
 465 {
 466         return disk->private_data;
 467 }
 468
 469 /*
 470  * Open.  Make sure the device is really there.
 471  */
 472 static int cciss_open(struct inode *inode, struct file *filep)
 473 {
 474         ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
 475         drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk);
 476
 477 #ifdef CCISS_DEBUG
 478         printk(KERN_DEBUG "cciss_open %s\n", inode->i_bdev->bd_disk->disk_name);
 479 #endif                          /* CCISS_DEBUG */
 480
 481         if (host->busy_initializing || drv->busy_configuring)
 482                 return -EBUSY;
 483         /*
 484          * Root is allowed to open raw volume zero even if it's not configured
 485          * so array config can still work. Root is also allowed to open any
 486          * volume that has a LUN ID, so it can issue IOCTL to reread the
 487          * disk information.  I don't think I really like this
 488          * but I'm already using way to many device nodes to claim another one
 489          * for "raw controller".
 490          */
 491         if (drv->nr_blocks == 0) {
 492                 if (iminor(inode) != 0) {       /* not node 0? */
 493                         /* if not node 0 make sure it is a partition = 0 */
 494                         if (iminor(inode) & 0x0f) {
 495                                 return -ENXIO;
 496                                 /* if it is, make sure we have a LUN ID */
 497                         } else if (drv->LunID == 0) {
 498                                 return -ENXIO;
 499                         }
 500                 }
 501                 if (!capable(CAP_SYS_ADMIN))
 502                         return -EPERM;
 503         }
 504         drv->usage_count++;
 505         host->usage_count++;
 506         return 0;
 507 }
 508
 509 /*
 510  * Close.  Sync first.
 511  */
 512 static int cciss_release(struct inode *inode, struct file *filep)
 513 {
 514         ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
 515         drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk);
 516
 517 #ifdef CCISS_DEBUG
 518         printk(KERN_DEBUG "cciss_release %s\n",
 519                inode->i_bdev->bd_disk->disk_name);
 520 #endif                          /* CCISS_DEBUG */
 521
 522         drv->usage_count--;
 523         host->usage_count--;
 524         return 0;
 525 }
 526
 527 #ifdef CONFIG_COMPAT
 528
 529 static int do_ioctl(struct file *f, unsigned cmd, unsigned long arg)
 530 {
 531         int ret;
 532         lock_kernel();
 533         ret = cciss_ioctl(f->f_dentry->d_inode, f, cmd, arg);
 534         unlock_kernel();
 535         return ret;
 536 }
 537
 538 static int cciss_ioctl32_passthru(struct file *f, unsigned cmd,
 539                                   unsigned long arg);
 540 static int cciss_ioctl32_big_passthru(struct file *f, unsigned cmd,
 541                                       unsigned long arg);
 542
 543 static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg)
 544 {
 545         switch (cmd) {
 546         case CCISS_GETPCIINFO:
 547         case CCISS_GETINTINFO:
 548         case CCISS_SETINTINFO:
 549         case CCISS_GETNODENAME:
 550         case CCISS_SETNODENAME:
 551         case CCISS_GETHEARTBEAT:
 552         case CCISS_GETBUSTYPES:
 553         case CCISS_GETFIRMVER:
 554         case CCISS_GETDRIVVER:
 555         case CCISS_REVALIDVOLS:
 556         case CCISS_DEREGDISK:
 557         case CCISS_REGNEWDISK:
 558         case CCISS_REGNEWD:
 559         case CCISS_RESCANDISK:
 560         case CCISS_GETLUNINFO:
 561                 return do_ioctl(f, cmd, arg);
 562
 563         case CCISS_PASSTHRU32:
 564                 return cciss_ioctl32_passthru(f, cmd, arg);
 565         case CCISS_BIG_PASSTHRU32:
 566                 return cciss_ioctl32_big_passthru(f, cmd, arg);
 567
 568         default:
 569                 return -ENOIOCTLCMD;
 570         }
 571 }
 572
 573 static int cciss_ioctl32_passthru(struct file *f, unsigned cmd,
 574                                   unsigned long arg)
 575 {
 576         IOCTL32_Command_struct __user *arg32 =
 577             (IOCTL32_Command_struct __user *) arg;
 578         IOCTL_Command_struct arg64;
 579         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
 580         int err;
 581         u32 cp;
 582
 583         err = 0;
 584         err |=
 585             copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
 586                            sizeof(arg64.LUN_info));
 587         err |=
 588             copy_from_user(&arg64.Request, &arg32->Request,
 589                            sizeof(arg64.Request));
 590         err |=
 591             copy_from_user(&arg64.error_info, &arg32->error_info,
 592                            sizeof(arg64.error_info));
 593         err |= get_user(arg64.buf_size, &arg32->buf_size);
 594         err |= get_user(cp, &arg32->buf);
 595         arg64.buf = compat_ptr(cp);
 596         err |= copy_to_user(p, &arg64, sizeof(arg64));
 597
 598         if (err)
 599                 return -EFAULT;
 600
 601         err = do_ioctl(f, CCISS_PASSTHRU, (unsigned long)p);
 602         if (err)
 603                 return err;
 604         err |=
 605             copy_in_user(&arg32->error_info, &p->error_info,
 606                          sizeof(arg32->error_info));
 607         if (err)
 608                 return -EFAULT;
 609         return err;
 610 }
 611
 612 static int cciss_ioctl32_big_passthru(struct file *file, unsigned cmd,
 613                                       unsigned long arg)
 614 {
 615         BIG_IOCTL32_Command_struct __user *arg32 =
 616             (BIG_IOCTL32_Command_struct __user *) arg;
 617         BIG_IOCTL_Command_struct arg64;
 618         BIG_IOCTL_Command_struct __user *p =
 619             compat_alloc_user_space(sizeof(arg64));
 620         int err;
 621         u32 cp;
 622
 623         err = 0;
 624         err |=
 625             copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
 626                            sizeof(arg64.LUN_info));
 627         err |=
 628             copy_from_user(&arg64.Request, &arg32->Request,
 629                            sizeof(arg64.Request));
 630         err |=
 631             copy_from_user(&arg64.error_info, &arg32->error_info,
 632                            sizeof(arg64.error_info));
 633         err |= get_user(arg64.buf_size, &arg32->buf_size);
 634         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
 635         err |= get_user(cp, &arg32->buf);
 636         arg64.buf = compat_ptr(cp);
 637         err |= copy_to_user(p, &arg64, sizeof(arg64));
 638
 639         if (err)
 640                 return -EFAULT;
 641
 642         err = do_ioctl(file, CCISS_BIG_PASSTHRU, (unsigned long)p);
 643         if (err)
 644                 return err;
 645         err |=
 646             copy_in_user(&arg32->error_info, &p->error_info,
 647                          sizeof(arg32->error_info));
 648         if (err)
 649                 return -EFAULT;
 650         return err;
 651 }
 652 #endif
 653
 654 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 655 {
 656         drive_info_struct *drv = get_drv(bdev->bd_disk);
 657
 658         if (!drv->cylinders)
 659                 return -ENXIO;
 660
 661         geo->heads = drv->heads;
 662         geo->sectors = drv->sectors;
 663         geo->cylinders = drv->cylinders;
 664         return 0;
 665 }
 666
 667 /*
 668  * ioctl
 669  */
 670 static int cciss_ioctl(struct inode *inode, struct file *filep,
 671                        unsigned int cmd, unsigned long arg)
 672 {
 673         struct block_device *bdev = inode->i_bdev;
 674         struct gendisk *disk = bdev->bd_disk;
 675         ctlr_info_t *host = get_host(disk);
 676         drive_info_struct *drv = get_drv(disk);
 677         int ctlr = host->ctlr;
 678         void __user *argp = (void __user *)arg;
 679
 680 #ifdef CCISS_DEBUG
 681         printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
 682 #endif                          /* CCISS_DEBUG */
 683
 684         switch (cmd) {
 685         case CCISS_GETPCIINFO:
 686                 {
 687                         cciss_pci_info_struct pciinfo;
 688
 689                         if (!arg)
 690                                 return -EINVAL;
 691                         pciinfo.domain = pci_domain_nr(host->pdev->bus);
 692                         pciinfo.bus = host->pdev->bus->number;
 693                         pciinfo.dev_fn = host->pdev->devfn;
 694                         pciinfo.board_id = host->board_id;
 695                         if (copy_to_user
 696                             (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
 697                                 return -EFAULT;
 698                         return 0;
 699                 }
 700         case CCISS_GETINTINFO:
 701                 {
 702                         cciss_coalint_struct intinfo;
 703                         if (!arg)
 704                                 return -EINVAL;
 705                         intinfo.delay =
 706                             readl(&host->cfgtable->HostWrite.CoalIntDelay);
 707                         intinfo.count =
 708                             readl(&host->cfgtable->HostWrite.CoalIntCount);
 709                         if (copy_to_user
 710                             (argp, &intinfo, sizeof(cciss_coalint_struct)))
 711                                 return -EFAULT;
 712                         return 0;
 713                 }
 714         case CCISS_SETINTINFO:
 715                 {
 716                         cciss_coalint_struct intinfo;
 717                         unsigned long flags;
 718                         int i;
 719
 720                         if (!arg)
 721                                 return -EINVAL;
 722                         if (!capable(CAP_SYS_ADMIN))
 723                                 return -EPERM;
 724                         if (copy_from_user
 725                             (&intinfo, argp, sizeof(cciss_coalint_struct)))
 726                                 return -EFAULT;
 727                         if ((intinfo.delay == 0) && (intinfo.count == 0))
 728                         {
 729 //                      printk("cciss_ioctl: delay and count cannot be 0\n");
 730                                 return -EINVAL;
 731                         }
 732                         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
 733                         /* Update the field, and then ring the doorbell */
 734                         writel(intinfo.delay,
 735                                &(host->cfgtable->HostWrite.CoalIntDelay));
 736                         writel(intinfo.count,
 737                                &(host->cfgtable->HostWrite.CoalIntCount));
 738                         writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
 739
 740                         for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
 741                                 if (!(readl(host->vaddr + SA5_DOORBELL)
 742                                       & CFGTBL_ChangeReq))
 743                                         break;
 744                                 /* delay and try again */
 745                                 udelay(1000);
 746                         }
 747                         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 748                         if (i >= MAX_IOCTL_CONFIG_WAIT)
 749                                 return -EAGAIN;
 750                         return 0;
 751                 }
 752         case CCISS_GETNODENAME:
 753                 {
 754                         NodeName_type NodeName;
 755                         int i;
 756
 757                         if (!arg)
 758                                 return -EINVAL;
 759                         for (i = 0; i < 16; i++)
 760                                 NodeName[i] =
 761                                     readb(&host->cfgtable->ServerName[i]);
 762                         if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
 763                                 return -EFAULT;
 764                         return 0;
 765                 }
 766         case CCISS_SETNODENAME:
 767                 {
 768                         NodeName_type NodeName;
 769                         unsigned long flags;
 770                         int i;
 771
 772                         if (!arg)
 773                                 return -EINVAL;
 774                         if (!capable(CAP_SYS_ADMIN))
 775                                 return -EPERM;
 776
 777                         if (copy_from_user
 778                             (NodeName, argp, sizeof(NodeName_type)))
 779                                 return -EFAULT;
 780
 781                         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
 782
 783                         /* Update the field, and then ring the doorbell */
 784                         for (i = 0; i < 16; i++)
 785                                 writeb(NodeName[i],
 786                                        &host->cfgtable->ServerName[i]);
 787
 788                         writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
 789
 790                         for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
 791                                 if (!(readl(host->vaddr + SA5_DOORBELL)
 792                                       & CFGTBL_ChangeReq))
 793                                         break;
 794                                 /* delay and try again */
 795                                 udelay(1000);
 796                         }
 797                         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 798                         if (i >= MAX_IOCTL_CONFIG_WAIT)
 799                                 return -EAGAIN;
 800                         return 0;
 801                 }
 802
 803         case CCISS_GETHEARTBEAT:
 804                 {
 805                         Heartbeat_type heartbeat;
 806
 807                         if (!arg)
 808                                 return -EINVAL;
 809                         heartbeat = readl(&host->cfgtable->HeartBeat);
 810                         if (copy_to_user
 811                             (argp, &heartbeat, sizeof(Heartbeat_type)))
 812                                 return -EFAULT;
 813                         return 0;
 814                 }
 815         case CCISS_GETBUSTYPES:
 816                 {
 817                         BusTypes_type BusTypes;
 818
 819                         if (!arg)
 820                                 return -EINVAL;
 821                         BusTypes = readl(&host->cfgtable->BusTypes);
 822                         if (copy_to_user
 823                             (argp, &BusTypes, sizeof(BusTypes_type)))
 824                                 return -EFAULT;
 825                         return 0;
 826                 }
 827         case CCISS_GETFIRMVER:
 828                 {
 829                         FirmwareVer_type firmware;
 830
 831                         if (!arg)
 832                                 return -EINVAL;
 833                         memcpy(firmware, host->firm_ver, 4);
 834
 835                         if (copy_to_user
 836                             (argp, firmware, sizeof(FirmwareVer_type)))
 837                                 return -EFAULT;
 838                         return 0;
 839                 }
 840         case CCISS_GETDRIVVER:
 841                 {
 842                         DriverVer_type DriverVer = DRIVER_VERSION;
 843
 844                         if (!arg)
 845                                 return -EINVAL;
 846
 847                         if (copy_to_user
 848                             (argp, &DriverVer, sizeof(DriverVer_type)))
 849                                 return -EFAULT;
 850                         return 0;
 851                 }
 852
 853         case CCISS_REVALIDVOLS:
 854                 if (bdev != bdev->bd_contains || drv != host->drv)
 855                         return -ENXIO;
 856                 return revalidate_allvol(host);
 857
 858         case CCISS_GETLUNINFO:{
 859                         LogvolInfo_struct luninfo;
 860
 861                         luninfo.LunID = drv->LunID;
 862                         luninfo.num_opens = drv->usage_count;
 863                         luninfo.num_parts = 0;
 864                         if (copy_to_user(argp, &luninfo,
 865                                          sizeof(LogvolInfo_struct)))
 866                                 return -EFAULT;
 867                         return 0;
 868                 }
 869         case CCISS_DEREGDISK:
 870                 return rebuild_lun_table(host, disk);
 871
 872         case CCISS_REGNEWD:
 873                 return rebuild_lun_table(host, NULL);
 874
 875         case CCISS_PASSTHRU:
 876                 {
 877                         IOCTL_Command_struct iocommand;
 878                         CommandList_struct *c;
 879                         char *buff = NULL;
 880                         u64bit temp64;
 881                         unsigned long flags;
 882                         DECLARE_COMPLETION_ONSTACK(wait);
 883
 884                         if (!arg)
 885                                 return -EINVAL;
 886
 887                         if (!capable(CAP_SYS_RAWIO))
 888                                 return -EPERM;
 889
 890                         if (copy_from_user
 891                             (&iocommand, argp, sizeof(IOCTL_Command_struct)))
 892                                 return -EFAULT;
 893                         if ((iocommand.buf_size < 1) &&
 894                             (iocommand.Request.Type.Direction != XFER_NONE)) {
 895                                 return -EINVAL;
 896                         }
 897 #if 0                           /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
 898                         /* Check kmalloc limits */
 899                         if (iocommand.buf_size > 128000)
 900                                 return -EINVAL;
 901 #endif
 902                         if (iocommand.buf_size > 0) {
 903                                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
 904                                 if (buff == NULL)
 905                                         return -EFAULT;
 906                         }
 907                         if (iocommand.Request.Type.Direction == XFER_WRITE) {
 908                                 /* Copy the data into the buffer we created */
 909                                 if (copy_from_user
 910                                     (buff, iocommand.buf, iocommand.buf_size)) {
 911                                         kfree(buff);
 912                                         return -EFAULT;
 913                                 }
 914                         } else {
 915                                 memset(buff, 0, iocommand.buf_size);
 916                         }
 917                         if ((c = cmd_alloc(host, 0)) == NULL) {
 918                                 kfree(buff);
 919                                 return -ENOMEM;
 920                         }
 921                         // Fill in the command type
 922                         c->cmd_type = CMD_IOCTL_PEND;
 923                         // Fill in Command Header
 924                         c->Header.ReplyQueue = 0;       // unused in simple mode
 925                         if (iocommand.buf_size > 0)     // buffer to fill
 926                         {
 927                                 c->Header.SGList = 1;
 928                                 c->Header.SGTotal = 1;
 929                         } else  // no buffers to fill
 930                         {
 931                                 c->Header.SGList = 0;
 932                                 c->Header.SGTotal = 0;
 933                         }
 934                         c->Header.LUN = iocommand.LUN_info;
 935                         c->Header.Tag.lower = c->busaddr;       // use the kernel address the cmd block for tag
 936
 937                         // Fill in Request block
 938                         c->Request = iocommand.Request;
 939
 940                         // Fill in the scatter gather information
 941                         if (iocommand.buf_size > 0) {
 942                                 temp64.val = pci_map_single(host->pdev, buff,
 943                                         iocommand.buf_size,
 944                                         PCI_DMA_BIDIRECTIONAL);
 945                                 c->SG[0].Addr.lower = temp64.val32.lower;
 946                                 c->SG[0].Addr.upper = temp64.val32.upper;
 947                                 c->SG[0].Len = iocommand.buf_size;
 948                                 c->SG[0].Ext = 0;       // we are not chaining
 949                         }
 950                         c->waiting = &wait;
 951
 952                         /* Put the request on the tail of the request queue */
 953                         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
 954                         addQ(&host->reqQ, c);
 955                         host->Qdepth++;
 956                         start_io(host);
 957                         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 958
 959                         wait_for_completion(&wait);
 960
 961                         /* unlock the buffers from DMA */
 962                         temp64.val32.lower = c->SG[0].Addr.lower;
 963                         temp64.val32.upper = c->SG[0].Addr.upper;
 964                         pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
 965                                          iocommand.buf_size,
 966                                          PCI_DMA_BIDIRECTIONAL);
 967
 968                         /* Copy the error information out */
 969                         iocommand.error_info = *(c->err_info);
 970                         if (copy_to_user
 971                             (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
 972                                 kfree(buff);
 973                                 cmd_free(host, c, 0);
 974                                 return -EFAULT;
 975                         }
 976
 977                         if (iocommand.Request.Type.Direction == XFER_READ) {
 978                                 /* Copy the data out of the buffer we created */
 979                                 if (copy_to_user
 980                                     (iocommand.buf, buff, iocommand.buf_size)) {
 981                                         kfree(buff);
 982                                         cmd_free(host, c, 0);
 983                                         return -EFAULT;
 984                                 }
 985                         }
 986                         kfree(buff);
 987                         cmd_free(host, c, 0);
 988                         return 0;
 989                 }
 990         case CCISS_BIG_PASSTHRU:{
 991                         BIG_IOCTL_Command_struct *ioc;
 992                         CommandList_struct *c;
 993                         unsigned char **buff = NULL;
 994                         int *buff_size = NULL;
 995                         u64bit temp64;
 996                         unsigned long flags;
 997                         BYTE sg_used = 0;
 998                         int status = 0;
 999                         int i;
1000                         DECLARE_COMPLETION_ONSTACK(wait);
1001                         __u32 left;
1002                         __u32 sz;
1003                         BYTE __user *data_ptr;
1004
1005                         if (!arg)
1006                                 return -EINVAL;
1007                         if (!capable(CAP_SYS_RAWIO))
1008                                 return -EPERM;
1009                         ioc = (BIG_IOCTL_Command_struct *)
1010                             kmalloc(sizeof(*ioc), GFP_KERNEL);
1011                         if (!ioc) {
1012                                 status = -ENOMEM;
1013                                 goto cleanup1;
1014                         }
1015                         if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1016                                 status = -EFAULT;
1017                                 goto cleanup1;
1018                         }
1019                         if ((ioc->buf_size < 1) &&
1020                             (ioc->Request.Type.Direction != XFER_NONE)) {
1021                                 status = -EINVAL;
1022                                 goto cleanup1;
1023                         }
1024                         /* Check kmalloc limits  using all SGs */
1025                         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1026                                 status = -EINVAL;
1027                                 goto cleanup1;
1028                         }
1029                         if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1030                                 status = -EINVAL;
1031                                 goto cleanup1;
1032                         }
1033                         buff =
1034                             kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1035                         if (!buff) {
1036                                 status = -ENOMEM;
1037                                 goto cleanup1;
1038                         }
1039                         buff_size = (int *)kmalloc(MAXSGENTRIES * sizeof(int),
1040                                                    GFP_KERNEL);
1041                         if (!buff_size) {
1042                                 status = -ENOMEM;
1043                                 goto cleanup1;
1044                         }
1045                         left = ioc->buf_size;
1046                         data_ptr = ioc->buf;
1047                         while (left) {
1048                                 sz = (left >
1049                                       ioc->malloc_size) ? ioc->
1050                                     malloc_size : left;
1051                                 buff_size[sg_used] = sz;
1052                                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1053                                 if (buff[sg_used] == NULL) {
1054                                         status = -ENOMEM;
1055                                         goto cleanup1;
1056                                 }
1057                                 if (ioc->Request.Type.Direction == XFER_WRITE) {
1058                                         if (copy_from_user
1059                                             (buff[sg_used], data_ptr, sz)) {
1060                                                 status = -ENOMEM;
1061                                                 goto cleanup1;
1062                                         }
1063                                 } else {
1064                                         memset(buff[sg_used], 0, sz);
1065                                 }
1066                                 left -= sz;
1067                                 data_ptr += sz;
1068                                 sg_used++;
1069                         }
1070                         if ((c = cmd_alloc(host, 0)) == NULL) {
1071                                 status = -ENOMEM;
1072                                 goto cleanup1;
1073                         }
1074                         c->cmd_type = CMD_IOCTL_PEND;
1075                         c->Header.ReplyQueue = 0;
1076
1077                         if (ioc->buf_size > 0) {
1078                                 c->Header.SGList = sg_used;
1079                                 c->Header.SGTotal = sg_used;
1080                         } else {
1081                                 c->Header.SGList = 0;
1082                                 c->Header.SGTotal = 0;
1083                         }
1084                         c->Header.LUN = ioc->LUN_info;
1085                         c->Header.Tag.lower = c->busaddr;
1086
1087                         c->Request = ioc->Request;
1088                         if (ioc->buf_size > 0) {
1089                                 int i;
1090                                 for (i = 0; i < sg_used; i++) {
1091                                         temp64.val =
1092                                             pci_map_single(host->pdev, buff[i],
1093                                                     buff_size[i],
1094                                                     PCI_DMA_BIDIRECTIONAL);
1095                                         c->SG[i].Addr.lower =
1096                                             temp64.val32.lower;
1097                                         c->SG[i].Addr.upper =
1098                                             temp64.val32.upper;
1099                                         c->SG[i].Len = buff_size[i];
1100                                         c->SG[i].Ext = 0;       /* we are not chaining */
1101                                 }
1102                         }
1103                         c->waiting = &wait;
1104                         /* Put the request on the tail of the request queue */
1105                         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1106                         addQ(&host->reqQ, c);
1107                         host->Qdepth++;
1108                         start_io(host);
1109                         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1110                         wait_for_completion(&wait);
1111                         /* unlock the buffers from DMA */
1112                         for (i = 0; i < sg_used; i++) {
1113                                 temp64.val32.lower = c->SG[i].Addr.lower;
1114                                 temp64.val32.upper = c->SG[i].Addr.upper;
1115                                 pci_unmap_single(host->pdev,
1116                                         (dma_addr_t) temp64.val, buff_size[i],
1117                                         PCI_DMA_BIDIRECTIONAL);
1118                         }
1119                         /* Copy the error information out */
1120                         ioc->error_info = *(c->err_info);
1121                         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1122                                 cmd_free(host, c, 0);
1123                                 status = -EFAULT;
1124                                 goto cleanup1;
1125                         }
1126                         if (ioc->Request.Type.Direction == XFER_READ) {
1127                                 /* Copy the data out of the buffer we created */
1128                                 BYTE __user *ptr = ioc->buf;
1129                                 for (i = 0; i < sg_used; i++) {
1130                                         if (copy_to_user
1131                                             (ptr, buff[i], buff_size[i])) {
1132                                                 cmd_free(host, c, 0);
1133                                                 status = -EFAULT;
1134                                                 goto cleanup1;
1135                                         }
1136                                         ptr += buff_size[i];
1137                                 }
1138                         }
1139                         cmd_free(host, c, 0);
1140                         status = 0;
1141                       cleanup1:
1142                         if (buff) {
1143                                 for (i = 0; i < sg_used; i++)
1144                                         kfree(buff[i]);
1145                                 kfree(buff);
1146                         }
1147                         kfree(buff_size);
1148                         kfree(ioc);
1149                         return status;
1150                 }
1151         default:
1152                 return -ENOTTY;
1153         }
1154 }
1155
1156 /*
1157  * revalidate_allvol is for online array config utilities.  After a
1158  * utility reconfigures the drives in the array, it can use this function
1159  * (through an ioctl) to make the driver zap any previous disk structs for
1160  * that controller and get new ones.
1161  *
1162  * Right now I'm using the getgeometry() function to do this, but this
1163  * function should probably be finer grained and allow you to revalidate one
1164  * particular logical volume (instead of all of them on a particular
1165  * controller).
1166  */
1167 static int revalidate_allvol(ctlr_info_t *host)
1168 {
1169         int ctlr = host->ctlr, i;
1170         unsigned long flags;
1171
1172         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1173         if (host->usage_count > 1) {
1174                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1175                 printk(KERN_WARNING "cciss: Device busy for volume"
1176                        " revalidation (usage=%d)\n", host->usage_count);
1177                 return -EBUSY;
1178         }
1179         host->usage_count++;
1180         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1181
1182         for (i = 0; i < NWD; i++) {
1183                 struct gendisk *disk = host->gendisk[i];
1184                 if (disk) {
1185                         request_queue_t *q = disk->queue;
1186
1187                         if (disk->flags & GENHD_FL_UP)
1188                                 del_gendisk(disk);
1189                         if (q)
1190                                 blk_cleanup_queue(q);
1191                 }
1192         }
1193
1194         /*
1195          * Set the partition and block size structures for all volumes
1196          * on this controller to zero.  We will reread all of this data
1197          */
1198         memset(host->drv, 0, sizeof(drive_info_struct)
1199                * CISS_MAX_LUN);
1200         /*
1201          * Tell the array controller not to give us any interrupts while
1202          * we check the new geometry.  Then turn interrupts back on when
1203          * we're done.
1204          */
1205         host->access.set_intr_mask(host, CCISS_INTR_OFF);
1206         cciss_getgeometry(ctlr);
1207         host->access.set_intr_mask(host, CCISS_INTR_ON);
1208
1209         /* Loop through each real device */
1210         for (i = 0; i < NWD; i++) {
1211                 struct gendisk *disk = host->gendisk[i];
1212                 drive_info_struct *drv = &(host->drv[i]);
1213                 /* we must register the controller even if no disks exist */
1214                 /* this is for the online array utilities */
1215                 if (!drv->heads && i)
1216                         continue;
1217                 blk_queue_hardsect_size(drv->queue, drv->block_size);
1218                 set_capacity(disk, drv->nr_blocks);
1219                 add_disk(disk);
1220         }
1221         host->usage_count--;
1222         return 0;
1223 }
1224
1225 static inline void complete_buffers(struct bio *bio, int status)
1226 {
1227         while (bio) {
1228                 struct bio *xbh = bio->bi_next;
1229                 int nr_sectors = bio_sectors(bio);
1230
1231                 bio->bi_next = NULL;
1232                 bio_endio(bio, nr_sectors << 9, status ? 0 : -EIO);
1233                 bio = xbh;
1234         }
1235 }
1236
1237 static void cciss_check_queues(ctlr_info_t *h)
1238 {
1239         int start_queue = h->next_to_run;
1240         int i;
1241
1242         /* check to see if we have maxed out the number of commands that can
1243          * be placed on the queue.  If so then exit.  We do this check here
1244          * in case the interrupt we serviced was from an ioctl and did not
1245          * free any new commands.
1246          */
1247         if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS)
1248                 return;
1249
1250         /* We have room on the queue for more commands.  Now we need to queue
1251          * them up.  We will also keep track of the next queue to run so
1252          * that every queue gets a chance to be started first.
1253          */
1254         for (i = 0; i < h->highest_lun + 1; i++) {
1255                 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1256                 /* make sure the disk has been added and the drive is real
1257                  * because this can be called from the middle of init_one.
1258                  */
1259                 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1260                         continue;
1261                 blk_start_queue(h->gendisk[curr_queue]->queue);
1262
1263                 /* check to see if we have maxed out the number of commands
1264                  * that can be placed on the queue.
1265                  */
1266                 if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS) {
1267                         if (curr_queue == start_queue) {
1268                                 h->next_to_run =
1269                                     (start_queue + 1) % (h->highest_lun + 1);
1270                                 break;
1271                         } else {
1272                                 h->next_to_run = curr_queue;
1273                                 break;
1274                         }
1275                 } else {
1276                         curr_queue = (curr_queue + 1) % (h->highest_lun + 1);
1277                 }
1278         }
1279 }
1280
1281 static void cciss_softirq_done(struct request *rq)
1282 {
1283         CommandList_struct *cmd = rq->completion_data;
1284         ctlr_info_t *h = hba[cmd->ctlr];
1285         unsigned long flags;
1286         u64bit temp64;
1287         int i, ddir;
1288
1289         if (cmd->Request.Type.Direction == XFER_READ)
1290                 ddir = PCI_DMA_FROMDEVICE;
1291         else
1292                 ddir = PCI_DMA_TODEVICE;
1293
1294         /* command did not need to be retried */
1295         /* unmap the DMA mapping for all the scatter gather elements */
1296         for (i = 0; i < cmd->Header.SGList; i++) {
1297                 temp64.val32.lower = cmd->SG[i].Addr.lower;
1298                 temp64.val32.upper = cmd->SG[i].Addr.upper;
1299                 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1300         }
1301
1302         complete_buffers(rq->bio, rq->errors);
1303
1304         if (blk_fs_request(rq)) {
1305                 const int rw = rq_data_dir(rq);
1306
1307                 disk_stat_add(rq->rq_disk, sectors[rw], rq->nr_sectors);
1308         }
1309
1310 #ifdef CCISS_DEBUG
1311         printk("Done with %p\n", rq);
1312 #endif                          /* CCISS_DEBUG */
1313
1314         add_disk_randomness(rq->rq_disk);
1315         spin_lock_irqsave(&h->lock, flags);
1316         end_that_request_last(rq, rq->errors);
1317         cmd_free(h, cmd, 1);
1318         cciss_check_queues(h);
1319         spin_unlock_irqrestore(&h->lock, flags);
1320 }
1321
1322 /* This function will check the usage_count of the drive to be updated/added.
1323  * If the usage_count is zero then the drive information will be updated and
1324  * the disk will be re-registered with the kernel.  If not then it will be
1325  * left alone for the next reboot.  The exception to this is disk 0 which
1326  * will always be left registered with the kernel since it is also the
1327  * controller node.  Any changes to disk 0 will show up on the next
1328  * reboot.
1329  */
1330 static void cciss_update_drive_info(int ctlr, int drv_index)
1331 {
1332         ctlr_info_t *h = hba[ctlr];
1333         struct gendisk *disk;
1334         InquiryData_struct *inq_buff = NULL;
1335         unsigned int block_size;
1336         sector_t total_size;
1337         unsigned long flags = 0;
1338         int ret = 0;
1339
1340         /* if the disk already exists then deregister it before proceeding */
1341         if (h->drv[drv_index].raid_level != -1) {
1342                 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1343                 h->drv[drv_index].busy_configuring = 1;
1344                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1345                 ret = deregister_disk(h->gendisk[drv_index],
1346                                       &h->drv[drv_index], 0);
1347                 h->drv[drv_index].busy_configuring = 0;
1348         }
1349
1350         /* If the disk is in use return */
1351         if (ret)
1352                 return;
1353
1354         /* Get information about the disk and modify the driver structure */
1355         inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1356         if (inq_buff == NULL)
1357                 goto mem_msg;
1358
1359         cciss_read_capacity(ctlr, drv_index, 1,
1360                             &total_size, &block_size);
1361
1362         /* total size = last LBA + 1 */
1363         /* FFFFFFFF + 1 = 0, cannot have a logical volume of size 0 */
1364         /* so we assume this volume this must be >2TB in size */
1365         if (total_size == (__u32) 0) {
1366                 cciss_read_capacity_16(ctlr, drv_index, 1,
1367                 &total_size, &block_size);
1368                 h->cciss_read = CCISS_READ_16;
1369                 h->cciss_write = CCISS_WRITE_16;
1370         } else {
1371                 h->cciss_read = CCISS_READ_10;
1372                 h->cciss_write = CCISS_WRITE_10;
1373         }
1374         cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1375                                inq_buff, &h->drv[drv_index]);
1376
1377         ++h->num_luns;
1378         disk = h->gendisk[drv_index];
1379         set_capacity(disk, h->drv[drv_index].nr_blocks);
1380
1381         /* if it's the controller it's already added */
1382         if (drv_index) {
1383                 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1384
1385                 /* Set up queue information */
1386                 disk->queue->backing_dev_info.ra_pages = READ_AHEAD;
1387                 blk_queue_bounce_limit(disk->queue, hba[ctlr]->pdev->dma_mask);
1388
1389                 /* This is a hardware imposed limit. */
1390                 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1391
1392                 /* This is a limit in the driver and could be eliminated. */
1393                 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1394
1395                 blk_queue_max_sectors(disk->queue, 512);
1396
1397                 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1398
1399                 disk->queue->queuedata = hba[ctlr];
1400
1401                 blk_queue_hardsect_size(disk->queue,
1402                                         hba[ctlr]->drv[drv_index].block_size);
1403
1404                 h->drv[drv_index].queue = disk->queue;
1405                 add_disk(disk);
1406         }
1407
1408       freeret:
1409         kfree(inq_buff);
1410         return;
1411       mem_msg:
1412         printk(KERN_ERR "cciss: out of memory\n");
1413         goto freeret;
1414 }
1415
1416 /* This function will find the first index of the controllers drive array
1417  * that has a -1 for the raid_level and will return that index.  This is
1418  * where new drives will be added.  If the index to be returned is greater
1419  * than the highest_lun index for the controller then highest_lun is set
1420  * to this new index.  If there are no available indexes then -1 is returned.
1421  */
1422 static int cciss_find_free_drive_index(int ctlr)
1423 {
1424         int i;
1425
1426         for (i = 0; i < CISS_MAX_LUN; i++) {
1427                 if (hba[ctlr]->drv[i].raid_level == -1) {
1428                         if (i > hba[ctlr]->highest_lun)
1429                                 hba[ctlr]->highest_lun = i;
1430                         return i;
1431                 }
1432         }
1433         return -1;
1434 }
1435
1436 /* This function will add and remove logical drives from the Logical
1437  * drive array of the controller and maintain persistency of ordering
1438  * so that mount points are preserved until the next reboot.  This allows
1439  * for the removal of logical drives in the middle of the drive array
1440  * without a re-ordering of those drives.
1441  * INPUT
1442  * h            = The controller to perform the operations on
1443  * del_disk     = The disk to remove if specified.  If the value given
1444  *                is NULL then no disk is removed.
1445  */
1446 static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk)
1447 {
1448         int ctlr = h->ctlr;
1449         int num_luns;
1450         ReportLunData_struct *ld_buff = NULL;
1451         drive_info_struct *drv = NULL;
1452         int return_code;
1453         int listlength = 0;
1454         int i;
1455         int drv_found;
1456         int drv_index = 0;
1457         __u32 lunid = 0;
1458         unsigned long flags;
1459
1460         /* Set busy_configuring flag for this operation */
1461         spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1462         if (h->num_luns >= CISS_MAX_LUN) {
1463                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1464                 return -EINVAL;
1465         }
1466
1467         if (h->busy_configuring) {
1468                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1469                 return -EBUSY;
1470         }
1471         h->busy_configuring = 1;
1472
1473         /* if del_disk is NULL then we are being called to add a new disk
1474          * and update the logical drive table.  If it is not NULL then
1475          * we will check if the disk is in use or not.
1476          */
1477         if (del_disk != NULL) {
1478                 drv = get_drv(del_disk);
1479                 drv->busy_configuring = 1;
1480                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1481                 return_code = deregister_disk(del_disk, drv, 1);
1482                 drv->busy_configuring = 0;
1483                 h->busy_configuring = 0;
1484                 return return_code;
1485         } else {
1486                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1487                 if (!capable(CAP_SYS_RAWIO))
1488                         return -EPERM;
1489
1490                 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1491                 if (ld_buff == NULL)
1492                         goto mem_msg;
1493
1494                 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
1495                                               sizeof(ReportLunData_struct), 0,
1496                                               0, 0, TYPE_CMD);
1497
1498                 if (return_code == IO_OK) {
1499                         listlength |=
1500                             (0xff & (unsigned int)(ld_buff->LUNListLength[0]))
1501                             << 24;
1502                         listlength |=
1503                             (0xff & (unsigned int)(ld_buff->LUNListLength[1]))
1504                             << 16;
1505                         listlength |=
1506                             (0xff & (unsigned int)(ld_buff->LUNListLength[2]))
1507                             << 8;
1508                         listlength |=
1509                             0xff & (unsigned int)(ld_buff->LUNListLength[3]);
1510                 } else {        /* reading number of logical volumes failed */
1511                         printk(KERN_WARNING "cciss: report logical volume"
1512                                " command failed\n");
1513                         listlength = 0;
1514                         goto freeret;
1515                 }
1516
1517                 num_luns = listlength / 8;      /* 8 bytes per entry */
1518                 if (num_luns > CISS_MAX_LUN) {
1519                         num_luns = CISS_MAX_LUN;
1520                         printk(KERN_WARNING "cciss: more luns configured"
1521                                " on controller than can be handled by"
1522                                " this driver.\n");
1523                 }
1524
1525                 /* Compare controller drive array to drivers drive array.
1526                  * Check for updates in the drive information and any new drives
1527                  * on the controller.
1528                  */
1529                 for (i = 0; i < num_luns; i++) {
1530                         int j;
1531
1532                         drv_found = 0;
1533
1534                         lunid = (0xff &
1535                                  (unsigned int)(ld_buff->LUN[i][3])) << 24;
1536                         lunid |= (0xff &
1537                                   (unsigned int)(ld_buff->LUN[i][2])) << 16;
1538                         lunid |= (0xff &
1539                                   (unsigned int)(ld_buff->LUN[i][1])) << 8;
1540                         lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]);
1541
1542                         /* Find if the LUN is already in the drive array
1543                          * of the controller.  If so then update its info
1544                          * if not is use.  If it does not exist then find
1545                          * the first free index and add it.
1546                          */
1547                         for (j = 0; j <= h->highest_lun; j++) {
1548                                 if (h->drv[j].LunID == lunid) {
1549                                         drv_index = j;
1550                                         drv_found = 1;
1551                                 }
1552                         }
1553
1554                         /* check if the drive was found already in the array */
1555                         if (!drv_found) {
1556                                 drv_index = cciss_find_free_drive_index(ctlr);
1557                                 if (drv_index == -1)
1558                                         goto freeret;
1559
1560                         }
1561                         h->drv[drv_index].LunID = lunid;
1562                         cciss_update_drive_info(ctlr, drv_index);
1563                 }               /* end for */
1564         }                       /* end else */
1565
1566       freeret:
1567         kfree(ld_buff);
1568         h->busy_configuring = 0;
1569         /* We return -1 here to tell the ACU that we have registered/updated
1570          * all of the drives that we can and to keep it from calling us
1571          * additional times.
1572          */
1573         return -1;
1574       mem_msg:
1575         printk(KERN_ERR "cciss: out of memory\n");
1576         goto freeret;
1577 }
1578
1579 /* This function will deregister the disk and it's queue from the
1580  * kernel.  It must be called with the controller lock held and the
1581  * drv structures busy_configuring flag set.  It's parameters are:
1582  *
1583  * disk = This is the disk to be deregistered
1584  * drv  = This is the drive_info_struct associated with the disk to be
1585  *        deregistered.  It contains information about the disk used
1586  *        by the driver.
1587  * clear_all = This flag determines whether or not the disk information
1588  *             is going to be completely cleared out and the highest_lun
1589  *             reset.  Sometimes we want to clear out information about
1590  *             the disk in preparation for re-adding it.  In this case
1591  *             the highest_lun should be left unchanged and the LunID
1592  *             should not be cleared.
1593 */
1594 static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
1595                            int clear_all)
1596 {
1597         ctlr_info_t *h = get_host(disk);
1598
1599         if (!capable(CAP_SYS_RAWIO))
1600                 return -EPERM;
1601
1602         /* make sure logical volume is NOT is use */
1603         if (clear_all || (h->gendisk[0] == disk)) {
1604                 if (drv->usage_count > 1)
1605                         return -EBUSY;
1606         } else if (drv->usage_count > 0)
1607                 return -EBUSY;
1608
1609         /* invalidate the devices and deregister the disk.  If it is disk
1610          * zero do not deregister it but just zero out it's values.  This
1611          * allows us to delete disk zero but keep the controller registered.
1612          */
1613         if (h->gendisk[0] != disk) {
1614                 if (disk) {
1615                         request_queue_t *q = disk->queue;
1616                         if (disk->flags & GENHD_FL_UP)
1617                                 del_gendisk(disk);
1618                         if (q) {
1619                                 blk_cleanup_queue(q);
1620                                 drv->queue = NULL;
1621                         }
1622                 }
1623         }
1624
1625         --h->num_luns;
1626         /* zero out the disk size info */
1627         drv->nr_blocks = 0;
1628         drv->block_size = 0;
1629         drv->heads = 0;
1630         drv->sectors = 0;
1631         drv->cylinders = 0;
1632         drv->raid_level = -1;   /* This can be used as a flag variable to
1633                                  * indicate that this element of the drive
1634                                  * array is free.
1635                                  */
1636
1637         if (clear_all) {
1638                 /* check to see if it was the last disk */
1639                 if (drv == h->drv + h->highest_lun) {
1640                         /* if so, find the new hightest lun */
1641                         int i, newhighest = -1;
1642                         for (i = 0; i < h->highest_lun; i++) {
1643                                 /* if the disk has size > 0, it is available */
1644                                 if (h->drv[i].heads)
1645                                         newhighest = i;
1646                         }
1647                         h->highest_lun = newhighest;
1648                 }
1649
1650                 drv->LunID = 0;
1651         }
1652         return 0;
1653 }
1654
1655 static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num,      /* 0: address the controller,
1656                                                                                                                            1: address logical volume log_unit,
1657                                                                                                                            2: periph device address is scsi3addr */
1658                     unsigned int log_unit, __u8 page_code,
1659                     unsigned char *scsi3addr, int cmd_type)
1660 {
1661         ctlr_info_t *h = hba[ctlr];
1662         u64bit buff_dma_handle;
1663         int status = IO_OK;
1664
1665         c->cmd_type = CMD_IOCTL_PEND;
1666         c->Header.ReplyQueue = 0;
1667         if (buff != NULL) {
1668                 c->Header.SGList = 1;
1669                 c->Header.SGTotal = 1;
1670         } else {
1671                 c->Header.SGList = 0;
1672                 c->Header.SGTotal = 0;
1673         }
1674         c->Header.Tag.lower = c->busaddr;
1675
1676         c->Request.Type.Type = cmd_type;
1677         if (cmd_type == TYPE_CMD) {
1678                 switch (cmd) {
1679                 case CISS_INQUIRY:
1680                         /* If the logical unit number is 0 then, this is going
1681                            to controller so It's a physical command
1682                            mode = 0 target = 0.  So we have nothing to write.
1683                            otherwise, if use_unit_num == 1,
1684                            mode = 1(volume set addressing) target = LUNID
1685                            otherwise, if use_unit_num == 2,
1686                            mode = 0(periph dev addr) target = scsi3addr */
1687                         if (use_unit_num == 1) {
1688                                 c->Header.LUN.LogDev.VolId =
1689                                     h->drv[log_unit].LunID;
1690                                 c->Header.LUN.LogDev.Mode = 1;
1691                         } else if (use_unit_num == 2) {
1692                                 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr,
1693                                        8);
1694                                 c->Header.LUN.LogDev.Mode = 0;
1695                         }
1696                         /* are we trying to read a vital product page */
1697                         if (page_code != 0) {
1698                                 c->Request.CDB[1] = 0x01;
1699                                 c->Request.CDB[2] = page_code;
1700                         }
1701                         c->Request.CDBLen = 6;
1702                         c->Request.Type.Attribute = ATTR_SIMPLE;
1703                         c->Request.Type.Direction = XFER_READ;
1704                         c->Request.Timeout = 0;
1705                         c->Request.CDB[0] = CISS_INQUIRY;
1706                         c->Request.CDB[4] = size & 0xFF;
1707                         break;
1708                 case CISS_REPORT_LOG:
1709                 case CISS_REPORT_PHYS:
1710                         /* Talking to controller so It's a physical command
1711                            mode = 00 target = 0.  Nothing to write.
1712                          */
1713                         c->Request.CDBLen = 12;
1714                         c->Request.Type.Attribute = ATTR_SIMPLE;
1715                         c->Request.Type.Direction = XFER_READ;
1716                         c->Request.Timeout = 0;
1717                         c->Request.CDB[0] = cmd;
1718                         c->Request.CDB[6] = (size >> 24) & 0xFF;        //MSB
1719                         c->Request.CDB[7] = (size >> 16) & 0xFF;
1720                         c->Request.CDB[8] = (size >> 8) & 0xFF;
1721                         c->Request.CDB[9] = size & 0xFF;
1722                         break;
1723
1724                 case CCISS_READ_CAPACITY:
1725                         c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1726                         c->Header.LUN.LogDev.Mode = 1;
1727                         c->Request.CDBLen = 10;
1728                         c->Request.Type.Attribute = ATTR_SIMPLE;
1729                         c->Request.Type.Direction = XFER_READ;
1730                         c->Request.Timeout = 0;
1731                         c->Request.CDB[0] = cmd;
1732                         break;
1733                 case CCISS_READ_CAPACITY_16:
1734                         c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1735                         c->Header.LUN.LogDev.Mode = 1;
1736                         c->Request.CDBLen = 16;
1737                         c->Request.Type.Attribute = ATTR_SIMPLE;
1738                         c->Request.Type.Direction = XFER_READ;
1739                         c->Request.Timeout = 0;
1740                         c->Request.CDB[0] = cmd;
1741                         c->Request.CDB[1] = 0x10;
1742                         c->Request.CDB[10] = (size >> 24) & 0xFF;
1743                         c->Request.CDB[11] = (size >> 16) & 0xFF;
1744                         c->Request.CDB[12] = (size >> 8) & 0xFF;
1745                         c->Request.CDB[13] = size & 0xFF;
1746                         c->Request.Timeout = 0;
1747                         c->Request.CDB[0] = cmd;
1748                         break;
1749                 case CCISS_CACHE_FLUSH:
1750                         c->Request.CDBLen = 12;
1751                         c->Request.Type.Attribute = ATTR_SIMPLE;
1752                         c->Request.Type.Direction = XFER_WRITE;
1753                         c->Request.Timeout = 0;
1754                         c->Request.CDB[0] = BMIC_WRITE;
1755                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
1756                         break;
1757                 default:
1758                         printk(KERN_WARNING
1759                                "cciss%d:  Unknown Command 0x%c\n", ctlr, cmd);
1760                         return IO_ERROR;
1761                 }
1762         } else if (cmd_type == TYPE_MSG) {
1763                 switch (cmd) {
1764                 case 0: /* ABORT message */
1765                         c->Request.CDBLen = 12;
1766                         c->Request.Type.Attribute = ATTR_SIMPLE;
1767                         c->Request.Type.Direction = XFER_WRITE;
1768                         c->Request.Timeout = 0;
1769                         c->Request.CDB[0] = cmd;        /* abort */
1770                         c->Request.CDB[1] = 0;  /* abort a command */
1771                         /* buff contains the tag of the command to abort */
1772                         memcpy(&c->Request.CDB[4], buff, 8);
1773                         break;
1774                 case 1: /* RESET message */
1775                         c->Request.CDBLen = 12;
1776                         c->Request.Type.Attribute = ATTR_SIMPLE;
1777                         c->Request.Type.Direction = XFER_WRITE;
1778                         c->Request.Timeout = 0;
1779                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
1780                         c->Request.CDB[0] = cmd;        /* reset */
1781                         c->Request.CDB[1] = 0x04;       /* reset a LUN */
1782                         break;
1783                 case 3: /* No-Op message */
1784                         c->Request.CDBLen = 1;
1785                         c->Request.Type.Attribute = ATTR_SIMPLE;
1786                         c->Request.Type.Direction = XFER_WRITE;
1787                         c->Request.Timeout = 0;
1788                         c->Request.CDB[0] = cmd;
1789                         break;
1790                 default:
1791                         printk(KERN_WARNING
1792                                "cciss%d: unknown message type %d\n", ctlr, cmd);
1793                         return IO_ERROR;
1794                 }
1795         } else {
1796                 printk(KERN_WARNING
1797                        "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1798                 return IO_ERROR;
1799         }
1800         /* Fill in the scatter gather information */
1801         if (size > 0) {
1802                 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
1803                                                              buff, size,
1804                                                              PCI_DMA_BIDIRECTIONAL);
1805                 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
1806                 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
1807                 c->SG[0].Len = size;
1808                 c->SG[0].Ext = 0;       /* we are not chaining */
1809         }
1810         return status;
1811 }
1812
1813 static int sendcmd_withirq(__u8 cmd,
1814                            int ctlr,
1815                            void *buff,
1816                            size_t size,
1817                            unsigned int use_unit_num,
1818                            unsigned int log_unit, __u8 page_code, int cmd_type)
1819 {
1820         ctlr_info_t *h = hba[ctlr];
1821         CommandList_struct *c;
1822         u64bit buff_dma_handle;
1823         unsigned long flags;
1824         int return_status;
1825         DECLARE_COMPLETION_ONSTACK(wait);
1826
1827         if ((c = cmd_alloc(h, 0)) == NULL)
1828                 return -ENOMEM;
1829         return_status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
1830                                  log_unit, page_code, NULL, cmd_type);
1831         if (return_status != IO_OK) {
1832                 cmd_free(h, c, 0);
1833                 return return_status;
1834         }
1835       resend_cmd2:
1836         c->waiting = &wait;
1837
1838         /* Put the request on the tail of the queue and send it */
1839         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1840         addQ(&h->reqQ, c);
1841         h->Qdepth++;
1842         start_io(h);
1843         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1844
1845         wait_for_completion(&wait);
1846
1847         if (c->err_info->CommandStatus != 0) {  /* an error has occurred */
1848                 switch (c->err_info->CommandStatus) {
1849                 case CMD_TARGET_STATUS:
1850                         printk(KERN_WARNING "cciss: cmd %p has "
1851                                " completed with errors\n", c);
1852                         if (c->err_info->ScsiStatus) {
1853                                 printk(KERN_WARNING "cciss: cmd %p "
1854                                        "has SCSI Status = %x\n",
1855                                        c, c->err_info->ScsiStatus);
1856                         }
1857
1858                         break;
1859                 case CMD_DATA_UNDERRUN:
1860                 case CMD_DATA_OVERRUN:
1861                         /* expected for inquire and report lun commands */
1862                         break;
1863                 case CMD_INVALID:
1864                         printk(KERN_WARNING "cciss: Cmd %p is "
1865                                "reported invalid\n", c);
1866                         return_status = IO_ERROR;
1867                         break;
1868                 case CMD_PROTOCOL_ERR:
1869                         printk(KERN_WARNING "cciss: cmd %p has "
1870                                "protocol error \n", c);
1871                         return_status = IO_ERROR;
1872                         break;
1873                 case CMD_HARDWARE_ERR:
1874                         printk(KERN_WARNING "cciss: cmd %p had "
1875                                " hardware error\n", c);
1876                         return_status = IO_ERROR;
1877                         break;
1878                 case CMD_CONNECTION_LOST:
1879                         printk(KERN_WARNING "cciss: cmd %p had "
1880                                "connection lost\n", c);
1881                         return_status = IO_ERROR;
1882                         break;
1883                 case CMD_ABORTED:
1884                         printk(KERN_WARNING "cciss: cmd %p was "
1885                                "aborted\n", c);
1886                         return_status = IO_ERROR;
1887                         break;
1888                 case CMD_ABORT_FAILED:
1889                         printk(KERN_WARNING "cciss: cmd %p reports "
1890                                "abort failed\n", c);
1891                         return_status = IO_ERROR;
1892                         break;
1893                 case CMD_UNSOLICITED_ABORT:
1894                         printk(KERN_WARNING
1895                                "cciss%d: unsolicited abort %p\n", ctlr, c);
1896                         if (c->retry_count < MAX_CMD_RETRIES) {
1897                                 printk(KERN_WARNING
1898                                        "cciss%d: retrying %p\n", ctlr, c);
1899                                 c->retry_count++;
1900                                 /* erase the old error information */
1901                                 memset(c->err_info, 0,
1902                                        sizeof(ErrorInfo_struct));
1903                                 return_status = IO_OK;
1904                                 INIT_COMPLETION(wait);
1905                                 goto resend_cmd2;
1906                         }
1907                         return_status = IO_ERROR;
1908                         break;
1909                 default:
1910                         printk(KERN_WARNING "cciss: cmd %p returned "
1911                                "unknown status %x\n", c,
1912                                c->err_info->CommandStatus);
1913                         return_status = IO_ERROR;
1914                 }
1915         }
1916         /* unlock the buffers from DMA */
1917         buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
1918         buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
1919         pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
1920                          c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
1921         cmd_free(h, c, 0);
1922         return return_status;
1923 }
1924
1925 static void cciss_geometry_inquiry(int ctlr, int logvol,
1926                                    int withirq, sector_t total_size,
1927                                    unsigned int block_size,
1928                                    InquiryData_struct *inq_buff,
1929                                    drive_info_struct *drv)
1930 {
1931         int return_code;
1932         unsigned long t;
1933
1934         memset(inq_buff, 0, sizeof(InquiryData_struct));
1935         if (withirq)
1936                 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
1937                                               inq_buff, sizeof(*inq_buff), 1,
1938                                               logvol, 0xC1, TYPE_CMD);
1939         else
1940                 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
1941                                       sizeof(*inq_buff), 1, logvol, 0xC1, NULL,
1942                                       TYPE_CMD);
1943         if (return_code == IO_OK) {
1944                 if (inq_buff->data_byte[8] == 0xFF) {
1945                         printk(KERN_WARNING
1946                                "cciss: reading geometry failed, volume "
1947                                "does not support reading geometry\n");
1948                         drv->heads = 255;
1949                         drv->sectors = 32;      // Sectors per track
1950                 } else {
1951                         drv->heads = inq_buff->data_byte[6];
1952                         drv->sectors = inq_buff->data_byte[7];
1953                         drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
1954                         drv->cylinders += inq_buff->data_byte[5];
1955                         drv->raid_level = inq_buff->data_byte[8];
1956                 }
1957                 drv->block_size = block_size;
1958                 drv->nr_blocks = total_size;
1959                 t = drv->heads * drv->sectors;
1960                 if (t > 1) {
1961                         unsigned rem = sector_div(total_size, t);
1962                         if (rem)
1963                                 total_size++;
1964                         drv->cylinders = total_size;
1965                 }
1966         } else {                /* Get geometry failed */
1967                 printk(KERN_WARNING "cciss: reading geometry failed\n");
1968         }
1969         printk(KERN_INFO "      heads=%d, sectors=%d, cylinders=%d\n\n",
1970                drv->heads, drv->sectors, drv->cylinders);
1971 }
1972
1973 static void
1974 cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
1975                     unsigned int *block_size)
1976 {
1977         ReadCapdata_struct *buf;
1978         int return_code;
1979         buf = kmalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
1980         if (buf == NULL) {
1981                 printk(KERN_WARNING "cciss: out of memory\n");
1982                 return;
1983         }
1984         memset(buf, 0, sizeof(ReadCapdata_struct));
1985         if (withirq)
1986                 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
1987                                 ctlr, buf, sizeof(ReadCapdata_struct),
1988                                         1, logvol, 0, TYPE_CMD);
1989         else
1990                 return_code = sendcmd(CCISS_READ_CAPACITY,
1991                                 ctlr, buf, sizeof(ReadCapdata_struct),
1992                                         1, logvol, 0, NULL, TYPE_CMD);
1993         if (return_code == IO_OK) {
1994                 *total_size = be32_to_cpu(*(__u32 *) buf->total_size)+1;
1995                 *block_size = be32_to_cpu(*(__u32 *) buf->block_size);
1996         } else {                /* read capacity command failed */
1997                 printk(KERN_WARNING "cciss: read capacity failed\n");
1998                 *total_size = 0;
1999                 *block_size = BLOCK_SIZE;
2000         }
2001         if (*total_size != (__u32) 0)
2002                 printk(KERN_INFO "      blocks= %llu block_size= %d\n",
2003                 (unsigned long long)*total_size, *block_size);
2004         kfree(buf);
2005         return;
2006 }
2007
2008 static void
2009 cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size,                                 unsigned int *block_size)
2010 {
2011         ReadCapdata_struct_16 *buf;
2012         int return_code;
2013         buf = kmalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2014         if (buf == NULL) {
2015                 printk(KERN_WARNING "cciss: out of memory\n");
2016                 return;
2017         }
2018         memset(buf, 0, sizeof(ReadCapdata_struct_16));
2019         if (withirq) {
2020                 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2021                         ctlr, buf, sizeof(ReadCapdata_struct_16),
2022                                 1, logvol, 0, TYPE_CMD);
2023         }
2024         else {
2025                 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2026                         ctlr, buf, sizeof(ReadCapdata_struct_16),
2027                                 1, logvol, 0, NULL, TYPE_CMD);
2028         }
2029         if (return_code == IO_OK) {
2030                 *total_size = be64_to_cpu(*(__u64 *) buf->total_size)+1;
2031                 *block_size = be32_to_cpu(*(__u32 *) buf->block_size);
2032         } else {                /* read capacity command failed */
2033                 printk(KERN_WARNING "cciss: read capacity failed\n");
2034                 *total_size = 0;
2035                 *block_size = BLOCK_SIZE;
2036         }
2037         printk(KERN_INFO "      blocks= %llu block_size= %d\n",
2038                (unsigned long long)*total_size, *block_size);
2039         kfree(buf);
2040         return;
2041 }
2042
2043 static int cciss_revalidate(struct gendisk *disk)
2044 {
2045         ctlr_info_t *h = get_host(disk);
2046         drive_info_struct *drv = get_drv(disk);
2047         int logvol;
2048         int FOUND = 0;
2049         unsigned int block_size;
2050         sector_t total_size;
2051         InquiryData_struct *inq_buff = NULL;
2052
2053         for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2054                 if (h->drv[logvol].LunID == drv->LunID) {
2055                         FOUND = 1;
2056                         break;
2057                 }
2058         }
2059
2060         if (!FOUND)
2061                 return 1;
2062
2063         inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2064         if (inq_buff == NULL) {
2065                 printk(KERN_WARNING "cciss: out of memory\n");
2066                 return 1;
2067         }
2068         if (h->cciss_read == CCISS_READ_10) {
2069                 cciss_read_capacity(h->ctlr, logvol, 1,
2070                                         &total_size, &block_size);
2071         } else {
2072                 cciss_read_capacity_16(h->ctlr, logvol, 1,
2073                                         &total_size, &block_size);
2074         }
2075         cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2076                                inq_buff, drv);
2077
2078         blk_queue_hardsect_size(drv->queue, drv->block_size);
2079         set_capacity(disk, drv->nr_blocks);
2080
2081         kfree(inq_buff);
2082         return 0;
2083 }
2084
2085 /*
2086  *   Wait polling for a command to complete.
2087  *   The memory mapped FIFO is polled for the completion.
2088  *   Used only at init time, interrupts from the HBA are disabled.
2089  */
2090 static unsigned long pollcomplete(int ctlr)
2091 {
2092         unsigned long done;
2093         int i;
2094
2095         /* Wait (up to 20 seconds) for a command to complete */
2096
2097         for (i = 20 * HZ; i > 0; i--) {
2098                 done = hba[ctlr]->access.command_completed(hba[ctlr]);
2099                 if (done == FIFO_EMPTY)
2100                         schedule_timeout_uninterruptible(1);
2101                 else
2102                         return done;
2103         }
2104         /* Invalid address to tell caller we ran out of time */
2105         return 1;
2106 }
2107
2108 static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
2109 {
2110         /* We get in here if sendcmd() is polling for completions
2111            and gets some command back that it wasn't expecting --
2112            something other than that which it just sent down.
2113            Ordinarily, that shouldn't happen, but it can happen when
2114            the scsi tape stuff gets into error handling mode, and
2115            starts using sendcmd() to try to abort commands and
2116            reset tape drives.  In that case, sendcmd may pick up
2117            completions of commands that were sent to logical drives
2118            through the block i/o system, or cciss ioctls completing, etc.
2119            In that case, we need to save those completions for later
2120            processing by the interrupt handler.
2121          */
2122
2123 #ifdef CONFIG_CISS_SCSI_TAPE
2124         struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;
2125
2126         /* If it's not the scsi tape stuff doing error handling, (abort */
2127         /* or reset) then we don't expect anything weird. */
2128         if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
2129 #endif
2130                 printk(KERN_WARNING "cciss cciss%d: SendCmd "
2131                        "Invalid command list address returned! (%lx)\n",
2132                        ctlr, complete);
2133                 /* not much we can do. */
2134 #ifdef CONFIG_CISS_SCSI_TAPE
2135                 return 1;
2136         }
2137
2138         /* We've sent down an abort or reset, but something else
2139            has completed */
2140         if (srl->ncompletions >= (NR_CMDS + 2)) {
2141                 /* Uh oh.  No room to save it for later... */
2142                 printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
2143                        "reject list overflow, command lost!\n", ctlr);
2144                 return 1;
2145         }
2146         /* Save it for later */
2147         srl->complete[srl->ncompletions] = complete;
2148         srl->ncompletions++;
2149 #endif
2150         return 0;
2151 }
2152
2153 /*
2154  * Send a command to the controller, and wait for it to complete.
2155  * Only used at init time.
2156  */
2157 static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num,      /* 0: address the controller,
2158                                                                                                    1: address logical volume log_unit,
2159                                                                                                    2: periph device address is scsi3addr */
2160                    unsigned int log_unit,
2161                    __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2162 {
2163         CommandList_struct *c;
2164         int i;
2165         unsigned long complete;
2166         ctlr_info_t *info_p = hba[ctlr];
2167         u64bit buff_dma_handle;
2168         int status, done = 0;
2169
2170         if ((c = cmd_alloc(info_p, 1)) == NULL) {
2171                 printk(KERN_WARNING "cciss: unable to get memory");
2172                 return IO_ERROR;
2173         }
2174         status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
2175                           log_unit, page_code, scsi3addr, cmd_type);
2176         if (status != IO_OK) {
2177                 cmd_free(info_p, c, 1);
2178                 return status;
2179         }
2180       resend_cmd1:
2181         /*
2182          * Disable interrupt
2183          */
2184 #ifdef CCISS_DEBUG
2185         printk(KERN_DEBUG "cciss: turning intr off\n");
2186 #endif                          /* CCISS_DEBUG */
2187         info_p->access.set_intr_mask(info_p, CCISS_INTR_OFF);
2188
2189         /* Make sure there is room in the command FIFO */
2190         /* Actually it should be completely empty at this time */
2191         /* unless we are in here doing error handling for the scsi */
2192         /* tape side of the driver. */
2193         for (i = 200000; i > 0; i--) {
2194                 /* if fifo isn't full go */
2195                 if (!(info_p->access.fifo_full(info_p))) {
2196
2197                         break;
2198                 }
2199                 udelay(10);
2200                 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
2201                        " waiting!\n", ctlr);
2202         }
2203         /*
2204          * Send the cmd
2205          */
2206         info_p->access.submit_command(info_p, c);
2207         done = 0;
2208         do {
2209                 complete = pollcomplete(ctlr);
2210
2211 #ifdef CCISS_DEBUG
2212                 printk(KERN_DEBUG "cciss: command completed\n");
2213 #endif                          /* CCISS_DEBUG */
2214
2215                 if (complete == 1) {
2216                         printk(KERN_WARNING
2217                                "cciss cciss%d: SendCmd Timeout out, "
2218                                "No command list address returned!\n", ctlr);
2219                         status = IO_ERROR;
2220                         done = 1;
2221                         break;
2222                 }
2223
2224                 /* This will need to change for direct lookup completions */
2225                 if ((complete & CISS_ERROR_BIT)
2226                     && (complete & ~CISS_ERROR_BIT) == c->busaddr) {
2227                         /* if data overrun or underun on Report command
2228                            ignore it
2229                          */
2230                         if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2231                              (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2232                              (c->Request.CDB[0] == CISS_INQUIRY)) &&
2233                             ((c->err_info->CommandStatus ==
2234                               CMD_DATA_OVERRUN) ||
2235                              (c->err_info->CommandStatus == CMD_DATA_UNDERRUN)
2236                             )) {
2237                                 complete = c->busaddr;
2238                         } else {
2239                                 if (c->err_info->CommandStatus ==
2240                                     CMD_UNSOLICITED_ABORT) {
2241                                         printk(KERN_WARNING "cciss%d: "
2242                                                "unsolicited abort %p\n",
2243                                                ctlr, c);
2244                                         if (c->retry_count < MAX_CMD_RETRIES) {
2245                                                 printk(KERN_WARNING
2246                                                        "cciss%d: retrying %p\n",
2247                                                        ctlr, c);
2248                                                 c->retry_count++;
2249                                                 /* erase the old error */
2250                                                 /* information */
2251                                                 memset(c->err_info, 0,
2252                                                        sizeof
2253                                                        (ErrorInfo_struct));
2254                                                 goto resend_cmd1;
2255                                         } else {
2256                                                 printk(KERN_WARNING
2257                                                        "cciss%d: retried %p too "
2258                                                        "many times\n", ctlr, c);
2259                                                 status = IO_ERROR;
2260                                                 goto cleanup1;
2261                                         }
2262                                 } else if (c->err_info->CommandStatus ==
2263                                            CMD_UNABORTABLE) {
2264                                         printk(KERN_WARNING
2265                                                "cciss%d: command could not be aborted.\n",
2266                                                ctlr);
2267                                         status = IO_ERROR;
2268                                         goto cleanup1;
2269                                 }
2270                                 printk(KERN_WARNING "ciss ciss%d: sendcmd"
2271                                        " Error %x \n", ctlr,
2272                                        c->err_info->CommandStatus);
2273                                 printk(KERN_WARNING "ciss ciss%d: sendcmd"
2274                                        " offensive info\n"
2275                                        "  size %x\n   num %x   value %x\n",
2276                                        ctlr,
2277                                        c->err_info->MoreErrInfo.Invalid_Cmd.
2278                                        offense_size,
2279                                        c->err_info->MoreErrInfo.Invalid_Cmd.
2280                                        offense_num,
2281                                        c->err_info->MoreErrInfo.Invalid_Cmd.
2282                                        offense_value);
2283                                 status = IO_ERROR;
2284                                 goto cleanup1;
2285                         }
2286                 }
2287                 /* This will need changing for direct lookup completions */
2288                 if (complete != c->busaddr) {
2289                         if (add_sendcmd_reject(cmd, ctlr, complete) != 0) {
2290                                 BUG();  /* we are pretty much hosed if we get here. */
2291                         }
2292                         continue;
2293                 } else
2294                         done = 1;
2295         } while (!done);
2296
2297       cleanup1:
2298         /* unlock the data buffer from DMA */
2299         buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2300         buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2301         pci_unmap_single(info_p->pdev, (dma_addr_t) buff_dma_handle.val,
2302                          c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2303 #ifdef CONFIG_CISS_SCSI_TAPE
2304         /* if we saved some commands for later, process them now. */
2305         if (info_p->scsi_rejects.ncompletions > 0)
2306                 do_cciss_intr(0, info_p);
2307 #endif
2308         cmd_free(info_p, c, 1);
2309         return status;
2310 }
2311
2312 /*
2313  * Map (physical) PCI mem into (virtual) kernel space
2314  */
2315 static void __iomem *remap_pci_mem(ulong base, ulong size)
2316 {
2317         ulong page_base = ((ulong) base) & PAGE_MASK;
2318         ulong page_offs = ((ulong) base) - page_base;
2319         void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2320
2321         return page_remapped ? (page_remapped + page_offs) : NULL;
2322 }
2323
2324 /*
2325  * Takes jobs of the Q and sends them to the hardware, then puts it on
2326  * the Q to wait for completion.
2327  */
2328 static void start_io(ctlr_info_t *h)
2329 {
2330         CommandList_struct *c;
2331
2332         while ((c = h->reqQ) != NULL) {
2333                 /* can't do anything if fifo is full */
2334                 if ((h->access.fifo_full(h))) {
2335                         printk(KERN_WARNING "cciss: fifo full\n");
2336                         break;
2337                 }
2338
2339                 /* Get the first entry from the Request Q */
2340                 removeQ(&(h->reqQ), c);
2341                 h->Qdepth--;
2342
2343                 /* Tell the controller execute command */
2344                 h->access.submit_command(h, c);
2345
2346                 /* Put job onto the completed Q */
2347                 addQ(&(h->cmpQ), c);
2348         }
2349 }
2350
2351 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2352 /* Zeros out the error record and then resends the command back */
2353 /* to the controller */
2354 static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
2355 {
2356         /* erase the old error information */
2357         memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2358
2359         /* add it to software queue and then send it to the controller */
2360         addQ(&(h->reqQ), c);
2361         h->Qdepth++;
2362         if (h->Qdepth > h->maxQsinceinit)
2363                 h->maxQsinceinit = h->Qdepth;
2364
2365         start_io(h);
2366 }
2367
2368 /* checks the status of the job and calls complete buffers to mark all
2369  * buffers for the completed job. Note that this function does not need
2370  * to hold the hba/queue lock.
2371  */
2372 static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2373                                     int timeout)
2374 {
2375         int status = 1;
2376         int retry_cmd = 0;
2377
2378         if (timeout)
2379                 status = 0;
2380
2381         if (cmd->err_info->CommandStatus != 0) {        /* an error has occurred */
2382                 switch (cmd->err_info->CommandStatus) {
2383                         unsigned char sense_key;
2384                 case CMD_TARGET_STATUS:
2385                         status = 0;
2386
2387                         if (cmd->err_info->ScsiStatus == 0x02) {
2388                                 printk(KERN_WARNING "cciss: cmd %p "
2389                                        "has CHECK CONDITION "
2390                                        " byte 2 = 0x%x\n", cmd,
2391                                        cmd->err_info->SenseInfo[2]
2392                                     );
2393                                 /* check the sense key */
2394                                 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2395                                 /* no status or recovered error */
2396                                 if ((sense_key == 0x0) || (sense_key == 0x1)) {
2397                                         status = 1;
2398                                 }
2399                         } else {
2400                                 printk(KERN_WARNING "cciss: cmd %p "
2401                                        "has SCSI Status 0x%x\n",
2402                                        cmd, cmd->err_info->ScsiStatus);
2403                         }
2404                         break;
2405                 case CMD_DATA_UNDERRUN:
2406                         printk(KERN_WARNING "cciss: cmd %p has"
2407                                " completed with data underrun "
2408                                "reported\n", cmd);
2409                         break;
2410                 case CMD_DATA_OVERRUN:
2411                         printk(KERN_WARNING "cciss: cmd %p has"
2412                                " completed with data overrun "
2413                                "reported\n", cmd);
2414                         break;
2415                 case CMD_INVALID:
2416                         printk(KERN_WARNING "cciss: cmd %p is "
2417                                "reported invalid\n", cmd);
2418                         status = 0;
2419                         break;
2420                 case CMD_PROTOCOL_ERR:
2421                         printk(KERN_WARNING "cciss: cmd %p has "
2422                                "protocol error \n", cmd);
2423                         status = 0;
2424                         break;
2425                 case CMD_HARDWARE_ERR:
2426                         printk(KERN_WARNING "cciss: cmd %p had "
2427                                " hardware error\n", cmd);
2428                         status = 0;
2429                         break;
2430                 case CMD_CONNECTION_LOST:
2431                         printk(KERN_WARNING "cciss: cmd %p had "
2432                                "connection lost\n", cmd);
2433                         status = 0;
2434                         break;
2435                 case CMD_ABORTED:
2436                         printk(KERN_WARNING "cciss: cmd %p was "
2437                                "aborted\n", cmd);
2438                         status = 0;
2439                         break;
2440                 case CMD_ABORT_FAILED:
2441                         printk(KERN_WARNING "cciss: cmd %p reports "
2442                                "abort failed\n", cmd);
2443                         status = 0;
2444                         break;
2445                 case CMD_UNSOLICITED_ABORT:
2446                         printk(KERN_WARNING "cciss%d: unsolicited "
2447                                "abort %p\n", h->ctlr, cmd);
2448                         if (cmd->retry_count < MAX_CMD_RETRIES) {
2449                                 retry_cmd = 1;
2450                                 printk(KERN_WARNING
2451                                        "cciss%d: retrying %p\n", h->ctlr, cmd);
2452                                 cmd->retry_count++;
2453                         } else
2454                                 printk(KERN_WARNING
2455                                        "cciss%d: %p retried too "
2456                                        "many times\n", h->ctlr, cmd);
2457                         status = 0;
2458                         break;
2459                 case CMD_TIMEOUT:
2460                         printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
2461                         status = 0;
2462                         break;
2463                 default:
2464                         printk(KERN_WARNING "cciss: cmd %p returned "
2465                                "unknown status %x\n", cmd,
2466                                cmd->err_info->CommandStatus);
2467                         status = 0;
2468                 }
2469         }
2470         /* We need to return this command */
2471         if (retry_cmd) {
2472                 resend_cciss_cmd(h, cmd);
2473                 return;
2474         }
2475
2476         cmd->rq->completion_data = cmd;
2477         cmd->rq->errors = status;
2478         blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);
2479         blk_complete_request(cmd->rq);
2480 }
2481
2482 /*
2483  * Get a request and submit it to the controller.
2484  */
2485 static void do_cciss_request(request_queue_t *q)
2486 {
2487         ctlr_info_t *h = q->queuedata;
2488         CommandList_struct *c;
2489         sector_t start_blk;
2490         int seg;
2491         struct request *creq;
2492         u64bit temp64;
2493         struct scatterlist tmp_sg[MAXSGENTRIES];
2494         drive_info_struct *drv;
2495         int i, dir;
2496
2497         /* We call start_io here in case there is a command waiting on the
2498          * queue that has not been sent.
2499          */
2500         if (blk_queue_plugged(q))
2501                 goto startio;
2502
2503       queue:
2504         creq = elv_next_request(q);
2505         if (!creq)
2506                 goto startio;
2507
2508         BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
2509
2510         if ((c = cmd_alloc(h, 1)) == NULL)
2511                 goto full;
2512
2513         blkdev_dequeue_request(creq);
2514
2515         spin_unlock_irq(q->queue_lock);
2516
2517         c->cmd_type = CMD_RWREQ;
2518         c->rq = creq;
2519
2520         /* fill in the request */
2521         drv = creq->rq_disk->private_data;
2522         c->Header.ReplyQueue = 0;       // unused in simple mode
2523         /* got command from pool, so use the command block index instead */
2524         /* for direct lookups. */
2525         /* The first 2 bits are reserved for controller error reporting. */
2526         c->Header.Tag.lower = (c->cmdindex << 3);
2527         c->Header.Tag.lower |= 0x04;    /* flag for direct lookup. */
2528         c->Header.LUN.LogDev.VolId = drv->LunID;
2529         c->Header.LUN.LogDev.Mode = 1;
2530         c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
2531         c->Request.Type.Type = TYPE_CMD;        // It is a command.
2532         c->Request.Type.Attribute = ATTR_SIMPLE;
2533         c->Request.Type.Direction =
2534             (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
2535         c->Request.Timeout = 0; // Don't time out
2536         c->Request.CDB[0] =
2537             (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
2538         start_blk = creq->sector;
2539 #ifdef CCISS_DEBUG
2540         printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", (int)creq->sector,
2541                (int)creq->nr_sectors);
2542 #endif                          /* CCISS_DEBUG */
2543
2544         seg = blk_rq_map_sg(q, creq, tmp_sg);
2545
2546         /* get the DMA records for the setup */
2547         if (c->Request.Type.Direction == XFER_READ)
2548                 dir = PCI_DMA_FROMDEVICE;
2549         else
2550                 dir = PCI_DMA_TODEVICE;
2551
2552         for (i = 0; i < seg; i++) {
2553                 c->SG[i].Len = tmp_sg[i].length;
2554                 temp64.val = (__u64) pci_map_page(h->pdev, tmp_sg[i].page,
2555                                                   tmp_sg[i].offset,
2556                                                   tmp_sg[i].length, dir);
2557                 c->SG[i].Addr.lower = temp64.val32.lower;
2558                 c->SG[i].Addr.upper = temp64.val32.upper;
2559                 c->SG[i].Ext = 0;       // we are not chaining
2560         }
2561         /* track how many SG entries we are using */
2562         if (seg > h->maxSG)
2563                 h->maxSG = seg;
2564
2565 #ifdef CCISS_DEBUG
2566         printk(KERN_DEBUG "cciss: Submitting %d sectors in %d segments\n",
2567                creq->nr_sectors, seg);
2568 #endif                          /* CCISS_DEBUG */
2569
2570         c->Header.SGList = c->Header.SGTotal = seg;
2571         if(h->cciss_read == CCISS_READ_10) {
2572                 c->Request.CDB[1] = 0;
2573                 c->Request.CDB[2] = (start_blk >> 24) & 0xff;   //MSB
2574                 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
2575                 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
2576                 c->Request.CDB[5] = start_blk & 0xff;
2577                 c->Request.CDB[6] = 0;  // (sect >> 24) & 0xff; MSB
2578                 c->Request.CDB[7] = (creq->nr_sectors >> 8) & 0xff;
2579                 c->Request.CDB[8] = creq->nr_sectors & 0xff;
2580                 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
2581         } else {
2582                 c->Request.CDBLen = 16;
2583                 c->Request.CDB[1]= 0;
2584                 c->Request.CDB[2]= (start_blk >> 56) & 0xff;    //MSB
2585                 c->Request.CDB[3]= (start_blk >> 48) & 0xff;
2586                 c->Request.CDB[4]= (start_blk >> 40) & 0xff;
2587                 c->Request.CDB[5]= (start_blk >> 32) & 0xff;
2588                 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
2589                 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
2590                 c->Request.CDB[8]= (start_blk >>  8) & 0xff;
2591                 c->Request.CDB[9]= start_blk & 0xff;
2592                 c->Request.CDB[10]= (creq->nr_sectors >>  24) & 0xff;
2593                 c->Request.CDB[11]= (creq->nr_sectors >>  16) & 0xff;
2594                 c->Request.CDB[12]= (creq->nr_sectors >>  8) & 0xff;
2595                 c->Request.CDB[13]= creq->nr_sectors & 0xff;
2596                 c->Request.CDB[14] = c->Request.CDB[15] = 0;
2597         }
2598
2599         spin_lock_irq(q->queue_lock);
2600
2601         addQ(&(h->reqQ), c);
2602         h->Qdepth++;
2603         if (h->Qdepth > h->maxQsinceinit)
2604                 h->maxQsinceinit = h->Qdepth;
2605
2606         goto queue;
2607 full:
2608         blk_stop_queue(q);
2609 startio:
2610         /* We will already have the driver lock here so not need
2611          * to lock it.
2612          */
2613         start_io(h);
2614 }
2615
2616 static inline unsigned long get_next_completion(ctlr_info_t *h)
2617 {
2618 #ifdef CONFIG_CISS_SCSI_TAPE
2619         /* Any rejects from sendcmd() lying around? Process them first */
2620         if (h->scsi_rejects.ncompletions == 0)
2621                 return h->access.command_completed(h);
2622         else {
2623                 struct sendcmd_reject_list *srl;
2624                 int n;
2625                 srl = &h->scsi_rejects;
2626                 n = --srl->ncompletions;
2627                 /* printk("cciss%d: processing saved reject\n", h->ctlr); */
2628                 printk("p");
2629                 return srl->complete[n];
2630         }
2631 #else
2632         return h->access.command_completed(h);
2633 #endif
2634 }
2635
2636 static inline int interrupt_pending(ctlr_info_t *h)
2637 {
2638 #ifdef CONFIG_CISS_SCSI_TAPE
2639         return (h->access.intr_pending(h)
2640                 || (h->scsi_rejects.ncompletions > 0));
2641 #else
2642         return h->access.intr_pending(h);
2643 #endif
2644 }
2645
2646 static inline long interrupt_not_for_us(ctlr_info_t *h)
2647 {
2648 #ifdef CONFIG_CISS_SCSI_TAPE
2649         return (((h->access.intr_pending(h) == 0) ||
2650                  (h->interrupts_enabled == 0))
2651                 && (h->scsi_rejects.ncompletions == 0));
2652 #else
2653         return (((h->access.intr_pending(h) == 0) ||
2654                  (h->interrupts_enabled == 0)));
2655 #endif
2656 }
2657
2658 static irqreturn_t do_cciss_intr(int irq, void *dev_id)
2659 {
2660         ctlr_info_t *h = dev_id;
2661         CommandList_struct *c;
2662         unsigned long flags;
2663         __u32 a, a1, a2;
2664
2665         if (interrupt_not_for_us(h))
2666                 return IRQ_NONE;
2667         /*
2668          * If there are completed commands in the completion queue,
2669          * we had better do something about it.
2670          */
2671         spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2672         while (interrupt_pending(h)) {
2673                 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
2674                         a1 = a;
2675                         if ((a & 0x04)) {
2676                                 a2 = (a >> 3);
2677                                 if (a2 >= NR_CMDS) {
2678                                         printk(KERN_WARNING
2679                                                "cciss: controller cciss%d failed, stopping.\n",
2680                                                h->ctlr);
2681                                         fail_all_cmds(h->ctlr);
2682                                         return IRQ_HANDLED;
2683                                 }
2684
2685                                 c = h->cmd_pool + a2;
2686                                 a = c->busaddr;
2687
2688                         } else {
2689                                 a &= ~3;
2690                                 if ((c = h->cmpQ) == NULL) {
2691                                         printk(KERN_WARNING
2692                                                "cciss: Completion of %08x ignored\n",
2693                                                a1);
2694                                         continue;
2695                                 }
2696                                 while (c->busaddr != a) {
2697                                         c = c->next;
2698                                         if (c == h->cmpQ)
2699                                                 break;
2700                                 }
2701                         }
2702                         /*
2703                          * If we've found the command, take it off the
2704                          * completion Q and free it
2705                          */
2706                         if (c->busaddr == a) {
2707                                 removeQ(&h->cmpQ, c);
2708                                 if (c->cmd_type == CMD_RWREQ) {
2709                                         complete_command(h, c, 0);
2710                                 } else if (c->cmd_type == CMD_IOCTL_PEND) {
2711                                         complete(c->waiting);
2712                                 }
2713 #                               ifdef CONFIG_CISS_SCSI_TAPE
2714                                 else if (c->cmd_type == CMD_SCSI)
2715                                         complete_scsi_command(c, 0, a1);
2716 #                               endif
2717                                 continue;
2718                         }
2719                 }
2720         }
2721
2722         spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2723         return IRQ_HANDLED;
2724 }
2725
2726 /*
2727  *  We cannot read the structure directly, for portability we must use
2728  *   the io functions.
2729  *   This is for debug only.
2730  */
2731 #ifdef CCISS_DEBUG
2732 static void print_cfg_table(CfgTable_struct *tb)
2733 {
2734         int i;
2735         char temp_name[17];
2736
2737         printk("Controller Configuration information\n");
2738         printk("------------------------------------\n");
2739         for (i = 0; i < 4; i++)
2740                 temp_name[i] = readb(&(tb->Signature[i]));
2741         temp_name[4] = '\0';
2742         printk("   Signature = %s\n", temp_name);
2743         printk("   Spec Number = %d\n", readl(&(tb->SpecValence)));
2744         printk("   Transport methods supported = 0x%x\n",
2745                readl(&(tb->TransportSupport)));
2746         printk("   Transport methods active = 0x%x\n",
2747                readl(&(tb->TransportActive)));
2748         printk("   Requested transport Method = 0x%x\n",
2749                readl(&(tb->HostWrite.TransportRequest)));
2750         printk("   Coalesce Interrupt Delay = 0x%x\n",
2751                readl(&(tb->HostWrite.CoalIntDelay)));
2752         printk("   Coalesce Interrupt Count = 0x%x\n",
2753                readl(&(tb->HostWrite.CoalIntCount)));
2754         printk("   Max outstanding commands = 0x%d\n",
2755                readl(&(tb->CmdsOutMax)));
2756         printk("   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
2757         for (i = 0; i < 16; i++)
2758                 temp_name[i] = readb(&(tb->ServerName[i]));
2759         temp_name[16] = '\0';
2760         printk("   Server Name = %s\n", temp_name);
2761         printk("   Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
2762 }
2763 #endif                          /* CCISS_DEBUG */
2764
2765 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
2766 {
2767         int i, offset, mem_type, bar_type;
2768         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
2769                 return 0;
2770         offset = 0;
2771         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
2772                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
2773                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
2774                         offset += 4;
2775                 else {
2776                         mem_type = pci_resource_flags(pdev, i) &
2777                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
2778                         switch (mem_type) {
2779                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
2780                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
2781                                 offset += 4;    /* 32 bit */
2782                                 break;
2783                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
2784                                 offset += 8;
2785                                 break;
2786                         default:        /* reserved in PCI 2.2 */
2787                                 printk(KERN_WARNING
2788                                        "Base address is invalid\n");
2789                                 return -1;
2790                                 break;
2791                         }
2792                 }
2793                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
2794                         return i + 1;
2795         }
2796         return -1;
2797 }
2798
2799 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
2800  * controllers that are capable. If not, we use IO-APIC mode.
2801  */
2802
2803 static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
2804                                            struct pci_dev *pdev, __u32 board_id)
2805 {
2806 #ifdef CONFIG_PCI_MSI
2807         int err;
2808         struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
2809         {0, 2}, {0, 3}
2810         };
2811
2812         /* Some boards advertise MSI but don't really support it */
2813         if ((board_id == 0x40700E11) ||
2814             (board_id == 0x40800E11) ||
2815             (board_id == 0x40820E11) || (board_id == 0x40830E11))
2816                 goto default_int_mode;
2817
2818         if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
2819                 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
2820                 if (!err) {
2821                         c->intr[0] = cciss_msix_entries[0].vector;
2822                         c->intr[1] = cciss_msix_entries[1].vector;
2823                         c->intr[2] = cciss_msix_entries[2].vector;
2824                         c->intr[3] = cciss_msix_entries[3].vector;
2825                         c->msix_vector = 1;
2826                         return;
2827                 }
2828                 if (err > 0) {
2829                         printk(KERN_WARNING "cciss: only %d MSI-X vectors "
2830                                "available\n", err);
2831                 } else {
2832                         printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
2833                                err);
2834                 }
2835         }
2836         if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
2837                 if (!pci_enable_msi(pdev)) {
2838                         c->intr[SIMPLE_MODE_INT] = pdev->irq;
2839                         c->msi_vector = 1;
2840                         return;
2841                 } else {
2842                         printk(KERN_WARNING "cciss: MSI init failed\n");
2843                         c->intr[SIMPLE_MODE_INT] = pdev->irq;
2844                         return;
2845                 }
2846         }
2847       default_int_mode:
2848 #endif                          /* CONFIG_PCI_MSI */
2849         /* if we get here we're going to use the default interrupt mode */
2850         c->intr[SIMPLE_MODE_INT] = pdev->irq;
2851         return;
2852 }
2853
2854 static int cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
2855 {
2856         ushort subsystem_vendor_id, subsystem_device_id, command;
2857         __u32 board_id, scratchpad = 0;
2858         __u64 cfg_offset;
2859         __u32 cfg_base_addr;
2860         __u64 cfg_base_addr_index;
2861         int i, err;
2862
2863         /* check to see if controller has been disabled */
2864         /* BEFORE trying to enable it */
2865         (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
2866         if (!(command & 0x02)) {
2867                 printk(KERN_WARNING
2868                        "cciss: controller appears to be disabled\n");
2869                 return -ENODEV;
2870         }
2871
2872         err = pci_enable_device(pdev);
2873         if (err) {
2874                 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
2875                 return err;
2876         }
2877
2878         err = pci_request_regions(pdev, "cciss");
2879         if (err) {
2880                 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
2881                        "aborting\n");
2882                 goto err_out_disable_pdev;
2883         }
2884
2885         subsystem_vendor_id = pdev->subsystem_vendor;
2886         subsystem_device_id = pdev->subsystem_device;
2887         board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
2888                     subsystem_vendor_id);
2889
2890 #ifdef CCISS_DEBUG
2891         printk("command = %x\n", command);
2892         printk("irq = %x\n", pdev->irq);
2893         printk("board_id = %x\n", board_id);
2894 #endif                          /* CCISS_DEBUG */
2895
2896 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
2897  * else we use the IO-APIC interrupt assigned to us by system ROM.
2898  */
2899         cciss_interrupt_mode(c, pdev, board_id);
2900
2901         /*
2902          * Memory base addr is first addr , the second points to the config
2903          *   table
2904          */
2905
2906         c->paddr = pci_resource_start(pdev, 0); /* addressing mode bits already removed */
2907 #ifdef CCISS_DEBUG
2908         printk("address 0 = %x\n", c->paddr);
2909 #endif                          /* CCISS_DEBUG */
2910         c->vaddr = remap_pci_mem(c->paddr, 200);
2911
2912         /* Wait for the board to become ready.  (PCI hotplug needs this.)
2913          * We poll for up to 120 secs, once per 100ms. */
2914         for (i = 0; i < 1200; i++) {
2915                 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
2916                 if (scratchpad == CCISS_FIRMWARE_READY)
2917                         break;
2918                 set_current_state(TASK_INTERRUPTIBLE);
2919                 schedule_timeout(HZ / 10);      /* wait 100ms */
2920         }
2921         if (scratchpad != CCISS_FIRMWARE_READY) {
2922                 printk(KERN_WARNING "cciss: Board not ready.  Timed out.\n");
2923                 err = -ENODEV;
2924                 goto err_out_free_res;
2925         }
2926
2927         /* get the address index number */
2928         cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
2929         cfg_base_addr &= (__u32) 0x0000ffff;
2930 #ifdef CCISS_DEBUG
2931         printk("cfg base address = %x\n", cfg_base_addr);
2932 #endif                          /* CCISS_DEBUG */
2933         cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
2934 #ifdef CCISS_DEBUG
2935         printk("cfg base address index = %x\n", cfg_base_addr_index);
2936 #endif                          /* CCISS_DEBUG */
2937         if (cfg_base_addr_index == -1) {
2938                 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
2939                 err = -ENODEV;
2940                 goto err_out_free_res;
2941         }
2942
2943         cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
2944 #ifdef CCISS_DEBUG
2945         printk("cfg offset = %x\n", cfg_offset);
2946 #endif                          /* CCISS_DEBUG */
2947         c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
2948                                                        cfg_base_addr_index) +
2949                                     cfg_offset, sizeof(CfgTable_struct));
2950         c->board_id = board_id;
2951
2952 #ifdef CCISS_DEBUG
2953         print_cfg_table(c->cfgtable);
2954 #endif                          /* CCISS_DEBUG */
2955
2956         for (i = 0; i < ARRAY_SIZE(products); i++) {
2957                 if (board_id == products[i].board_id) {
2958                         c->product_name = products[i].product_name;
2959                         c->access = *(products[i].access);
2960                         break;
2961                 }
2962         }
2963         if (i == ARRAY_SIZE(products)) {
2964                 printk(KERN_WARNING "cciss: Sorry, I don't know how"
2965                        " to access the Smart Array controller %08lx\n",
2966                        (unsigned long)board_id);
2967                 err = -ENODEV;
2968                 goto err_out_free_res;
2969         }
2970         if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
2971             (readb(&c->cfgtable->Signature[1]) != 'I') ||
2972             (readb(&c->cfgtable->Signature[2]) != 'S') ||
2973             (readb(&c->cfgtable->Signature[3]) != 'S')) {
2974                 printk("Does not appear to be a valid CISS config table\n");
2975                 err = -ENODEV;
2976                 goto err_out_free_res;
2977         }
2978 #ifdef CONFIG_X86
2979         {
2980                 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
2981                 __u32 prefetch;
2982                 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
2983                 prefetch |= 0x100;
2984                 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
2985         }
2986 #endif
2987
2988 #ifdef CCISS_DEBUG
2989         printk("Trying to put board into Simple mode\n");
2990 #endif                          /* CCISS_DEBUG */
2991         c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
2992         /* Update the field, and then ring the doorbell */
2993         writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
2994         writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
2995
2996         /* under certain very rare conditions, this can take awhile.
2997          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
2998          * as we enter this code.) */
2999         for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3000                 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3001                         break;
3002                 /* delay and try again */
3003                 set_current_state(TASK_INTERRUPTIBLE);
3004                 schedule_timeout(10);
3005         }
3006
3007 #ifdef CCISS_DEBUG
3008         printk(KERN_DEBUG "I counter got to %d %x\n", i,
3009                readl(c->vaddr + SA5_DOORBELL));
3010 #endif                          /* CCISS_DEBUG */
3011 #ifdef CCISS_DEBUG
3012         print_cfg_table(c->cfgtable);
3013 #endif                          /* CCISS_DEBUG */
3014
3015         if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3016                 printk(KERN_WARNING "cciss: unable to get board into"
3017                        " simple mode\n");
3018                 err = -ENODEV;
3019                 goto err_out_free_res;
3020         }
3021         return 0;
3022
3023       err_out_free_res:
3024         pci_release_regions(pdev);
3025
3026       err_out_disable_pdev:
3027         pci_disable_device(pdev);
3028         return err;
3029 }
3030
3031 /*
3032  * Gets information about the local volumes attached to the controller.
3033  */
3034 static void cciss_getgeometry(int cntl_num)
3035 {
3036         ReportLunData_struct *ld_buff;
3037         InquiryData_struct *inq_buff;
3038         int return_code;
3039         int i;
3040         int listlength = 0;
3041         __u32 lunid = 0;
3042         int block_size;
3043         sector_t total_size;
3044
3045         ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
3046         if (ld_buff == NULL) {
3047                 printk(KERN_ERR "cciss: out of memory\n");
3048                 return;
3049         }
3050         inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
3051         if (inq_buff == NULL) {
3052                 printk(KERN_ERR "cciss: out of memory\n");
3053                 kfree(ld_buff);
3054                 return;
3055         }
3056         /* Get the firmware version */
3057         return_code = sendcmd(CISS_INQUIRY, cntl_num, inq_buff,
3058                               sizeof(InquiryData_struct), 0, 0, 0, NULL,
3059                               TYPE_CMD);
3060         if (return_code == IO_OK) {
3061                 hba[cntl_num]->firm_ver[0] = inq_buff->data_byte[32];
3062                 hba[cntl_num]->firm_ver[1] = inq_buff->data_byte[33];
3063                 hba[cntl_num]->firm_ver[2] = inq_buff->data_byte[34];
3064                 hba[cntl_num]->firm_ver[3] = inq_buff->data_byte[35];
3065         } else {                /* send command failed */
3066
3067                 printk(KERN_WARNING "cciss: unable to determine firmware"
3068                        " version of controller\n");
3069         }
3070         /* Get the number of logical volumes */
3071         return_code = sendcmd(CISS_REPORT_LOG, cntl_num, ld_buff,
3072                               sizeof(ReportLunData_struct), 0, 0, 0, NULL,
3073                               TYPE_CMD);
3074
3075         if (return_code == IO_OK) {
3076 #ifdef CCISS_DEBUG
3077                 printk("LUN Data\n--------------------------\n");
3078 #endif                          /* CCISS_DEBUG */
3079
3080                 listlength |=
3081                     (0xff & (unsigned int)(ld_buff->LUNListLength[0])) << 24;
3082                 listlength |=
3083                     (0xff & (unsigned int)(ld_buff->LUNListLength[1])) << 16;
3084                 listlength |=
3085                     (0xff & (unsigned int)(ld_buff->LUNListLength[2])) << 8;
3086                 listlength |= 0xff & (unsigned int)(ld_buff->LUNListLength[3]);
3087         } else {                /* reading number of logical volumes failed */
3088
3089                 printk(KERN_WARNING "cciss: report logical volume"
3090                        " command failed\n");
3091                 listlength = 0;
3092         }
3093         hba[cntl_num]->num_luns = listlength / 8;       // 8 bytes pre entry
3094         if (hba[cntl_num]->num_luns > CISS_MAX_LUN) {
3095                 printk(KERN_ERR
3096                        "ciss:  only %d number of logical volumes supported\n",
3097                        CISS_MAX_LUN);
3098                 hba[cntl_num]->num_luns = CISS_MAX_LUN;
3099         }
3100 #ifdef CCISS_DEBUG
3101         printk(KERN_DEBUG "Length = %x %x %x %x = %d\n",
3102                ld_buff->LUNListLength[0], ld_buff->LUNListLength[1],
3103                ld_buff->LUNListLength[2], ld_buff->LUNListLength[3],
3104                hba[cntl_num]->num_luns);
3105 #endif                          /* CCISS_DEBUG */
3106
3107         hba[cntl_num]->highest_lun = hba[cntl_num]->num_luns - 1;
3108         for (i = 0; i < CISS_MAX_LUN; i++) {
3109                 if (i < hba[cntl_num]->num_luns) {
3110                         lunid = (0xff & (unsigned int)(ld_buff->LUN[i][3]))
3111                             << 24;
3112                         lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][2]))
3113                             << 16;
3114                         lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][1]))
3115                             << 8;
3116                         lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]);
3117
3118                         hba[cntl_num]->drv[i].LunID = lunid;
3119
3120 #ifdef CCISS_DEBUG
3121                         printk(KERN_DEBUG "LUN[%d]:  %x %x %x %x = %x\n", i,
3122                                ld_buff->LUN[i][0], ld_buff->LUN[i][1],
3123                                ld_buff->LUN[i][2], ld_buff->LUN[i][3],
3124                                hba[cntl_num]->drv[i].LunID);
3125 #endif                          /* CCISS_DEBUG */
3126
3127                 /* testing to see if 16-byte CDBs are already being used */
3128                 if(hba[cntl_num]->cciss_read == CCISS_READ_16) {
3129                         cciss_read_capacity_16(cntl_num, i, 0,
3130                                             &total_size, &block_size);
3131                         goto geo_inq;
3132                 }
3133                 cciss_read_capacity(cntl_num, i, 0, &total_size, &block_size);
3134
3135                 /* total_size = last LBA + 1 */
3136                 if(total_size == (__u32) 0) {
3137                         cciss_read_capacity_16(cntl_num, i, 0,
3138                         &total_size, &block_size);
3139                         hba[cntl_num]->cciss_read = CCISS_READ_16;
3140                         hba[cntl_num]->cciss_write = CCISS_WRITE_16;
3141                 } else {
3142                         hba[cntl_num]->cciss_read = CCISS_READ_10;
3143                         hba[cntl_num]->cciss_write = CCISS_WRITE_10;
3144                 }
3145 geo_inq:
3146                         cciss_geometry_inquiry(cntl_num, i, 0, total_size,
3147                                                block_size, inq_buff,
3148                                                &hba[cntl_num]->drv[i]);
3149                 } else {
3150                         /* initialize raid_level to indicate a free space */
3151                         hba[cntl_num]->drv[i].raid_level = -1;
3152                 }
3153         }
3154         kfree(ld_buff);
3155         kfree(inq_buff);
3156 }
3157
3158 /* Function to find the first free pointer into our hba[] array */
3159 /* Returns -1 if no free entries are left.  */
3160 static int alloc_cciss_hba(void)
3161 {
3162         struct gendisk *disk[NWD];
3163         int i, n;
3164         for (n = 0; n < NWD; n++) {
3165                 disk[n] = alloc_disk(1 << NWD_SHIFT);
3166                 if (!disk[n])
3167                         goto out;
3168         }
3169
3170         for (i = 0; i < MAX_CTLR; i++) {
3171                 if (!hba[i]) {
3172                         ctlr_info_t *p;
3173                         p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
3174                         if (!p)
3175                                 goto Enomem;
3176                         for (n = 0; n < NWD; n++)
3177                                 p->gendisk[n] = disk[n];
3178                         hba[i] = p;
3179                         return i;
3180                 }
3181         }
3182         printk(KERN_WARNING "cciss: This driver supports a maximum"
3183                " of %d controllers.\n", MAX_CTLR);
3184         goto out;
3185       Enomem:
3186         printk(KERN_ERR "cciss: out of memory.\n");
3187       out:
3188         while (n--)
3189                 put_disk(disk[n]);
3190         return -1;
3191 }
3192
3193 static void free_hba(int i)
3194 {
3195         ctlr_info_t *p = hba[i];
3196         int n;
3197
3198         hba[i] = NULL;
3199         for (n = 0; n < NWD; n++)
3200                 put_disk(p->gendisk[n]);
3201         kfree(p);
3202 }
3203
3204 /*
3205  *  This is it.  Find all the controllers and register them.  I really hate
3206  *  stealing all these major device numbers.
3207  *  returns the number of block devices registered.
3208  */
3209 static int __devinit cciss_init_one(struct pci_dev *pdev,
3210                                     const struct pci_device_id *ent)
3211 {
3212         request_queue_t *q;
3213         int i;
3214         int j;
3215         int rc;
3216         int dac;
3217
3218         i = alloc_cciss_hba();
3219         if (i < 0)
3220                 return -1;
3221
3222         hba[i]->busy_initializing = 1;
3223
3224         if (cciss_pci_init(hba[i], pdev) != 0)
3225                 goto clean1;
3226
3227         sprintf(hba[i]->devname, "cciss%d", i);
3228         hba[i]->ctlr = i;
3229         hba[i]->pdev = pdev;
3230
3231         /* configure PCI DMA stuff */
3232         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK))
3233                 dac = 1;
3234         else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK))
3235                 dac = 0;
3236         else {
3237                 printk(KERN_ERR "cciss: no suitable DMA available\n");
3238                 goto clean1;
3239         }
3240
3241         /*
3242          * register with the major number, or get a dynamic major number
3243          * by passing 0 as argument.  This is done for greater than
3244          * 8 controller support.
3245          */
3246         if (i < MAX_CTLR_ORIG)
3247                 hba[i]->major = COMPAQ_CISS_MAJOR + i;
3248         rc = register_blkdev(hba[i]->major, hba[i]->devname);
3249         if (rc == -EBUSY || rc == -EINVAL) {
3250                 printk(KERN_ERR
3251                        "cciss:  Unable to get major number %d for %s "
3252                        "on hba %d\n", hba[i]->major, hba[i]->devname, i);
3253                 goto clean1;
3254         } else {
3255                 if (i >= MAX_CTLR_ORIG)
3256                         hba[i]->major = rc;
3257         }
3258
3259         /* make sure the board interrupts are off */
3260         hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
3261         if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
3262                         IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
3263                 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
3264                        hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
3265                 goto clean2;
3266         }
3267
3268         printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
3269                hba[i]->devname, pdev->device, pci_name(pdev),
3270                hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
3271
3272         hba[i]->cmd_pool_bits =
3273             kmalloc(((NR_CMDS + BITS_PER_LONG -
3274                       1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
3275         hba[i]->cmd_pool = (CommandList_struct *)
3276             pci_alloc_consistent(hba[i]->pdev,
3277                     NR_CMDS * sizeof(CommandList_struct),
3278                     &(hba[i]->cmd_pool_dhandle));
3279         hba[i]->errinfo_pool = (ErrorInfo_struct *)
3280             pci_alloc_consistent(hba[i]->pdev,
3281                     NR_CMDS * sizeof(ErrorInfo_struct),
3282                     &(hba[i]->errinfo_pool_dhandle));
3283         if ((hba[i]->cmd_pool_bits == NULL)
3284             || (hba[i]->cmd_pool == NULL)
3285             || (hba[i]->errinfo_pool == NULL)) {
3286                 printk(KERN_ERR "cciss: out of memory");
3287                 goto clean4;
3288         }
3289 #ifdef CONFIG_CISS_SCSI_TAPE
3290         hba[i]->scsi_rejects.complete =
3291             kmalloc(sizeof(hba[i]->scsi_rejects.complete[0]) *
3292                     (NR_CMDS + 5), GFP_KERNEL);
3293         if (hba[i]->scsi_rejects.complete == NULL) {
3294                 printk(KERN_ERR "cciss: out of memory");
3295                 goto clean4;
3296         }
3297 #endif
3298         spin_lock_init(&hba[i]->lock);
3299
3300         /* Initialize the pdev driver private data.
3301            have it point to hba[i].  */
3302         pci_set_drvdata(pdev, hba[i]);
3303         /* command and error info recs zeroed out before
3304            they are used */
3305         memset(hba[i]->cmd_pool_bits, 0,
3306                ((NR_CMDS + BITS_PER_LONG -
3307                  1) / BITS_PER_LONG) * sizeof(unsigned long));
3308
3309 #ifdef CCISS_DEBUG
3310         printk(KERN_DEBUG "Scanning for drives on controller cciss%d\n", i);
3311 #endif                          /* CCISS_DEBUG */
3312
3313         cciss_getgeometry(i);
3314
3315         cciss_scsi_setup(i);
3316
3317         /* Turn the interrupts on so we can service requests */
3318         hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
3319
3320         cciss_procinit(i);
3321         hba[i]->busy_initializing = 0;
3322
3323         for (j = 0; j < NWD; j++) {     /* mfm */
3324                 drive_info_struct *drv = &(hba[i]->drv[j]);
3325                 struct gendisk *disk = hba[i]->gendisk[j];
3326
3327                 q = blk_init_queue(do_cciss_request, &hba[i]->lock);
3328                 if (!q) {
3329                         printk(KERN_ERR
3330                                "cciss:  unable to allocate queue for disk %d\n",
3331                                j);
3332                         break;
3333                 }
3334                 drv->queue = q;
3335
3336                 q->backing_dev_info.ra_pages = READ_AHEAD;
3337                 blk_queue_bounce_limit(q, hba[i]->pdev->dma_mask);
3338
3339                 /* This is a hardware imposed limit. */
3340                 blk_queue_max_hw_segments(q, MAXSGENTRIES);
3341
3342                 /* This is a limit in the driver and could be eliminated. */
3343                 blk_queue_max_phys_segments(q, MAXSGENTRIES);
3344
3345                 blk_queue_max_sectors(q, 512);
3346
3347                 blk_queue_softirq_done(q, cciss_softirq_done);
3348
3349                 q->queuedata = hba[i];
3350                 sprintf(disk->disk_name, "cciss/c%dd%d", i, j);
3351                 disk->major = hba[i]->major;
3352                 disk->first_minor = j << NWD_SHIFT;
3353                 disk->fops = &cciss_fops;
3354                 disk->queue = q;
3355                 disk->private_data = drv;
3356                 disk->driverfs_dev = &pdev->dev;
3357                 /* we must register the controller even if no disks exist */
3358                 /* this is for the online array utilities */
3359                 if (!drv->heads && j)
3360                         continue;
3361                 blk_queue_hardsect_size(q, drv->block_size);
3362                 set_capacity(disk, drv->nr_blocks);
3363                 add_disk(disk);
3364         }
3365
3366         return 1;
3367
3368       clean4:
3369 #ifdef CONFIG_CISS_SCSI_TAPE
3370         kfree(hba[i]->scsi_rejects.complete);
3371 #endif
3372         kfree(hba[i]->cmd_pool_bits);
3373         if (hba[i]->cmd_pool)
3374                 pci_free_consistent(hba[i]->pdev,
3375                                     NR_CMDS * sizeof(CommandList_struct),
3376                                     hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3377         if (hba[i]->errinfo_pool)
3378                 pci_free_consistent(hba[i]->pdev,
3379                                     NR_CMDS * sizeof(ErrorInfo_struct),
3380                                     hba[i]->errinfo_pool,
3381                                     hba[i]->errinfo_pool_dhandle);
3382         free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
3383       clean2:
3384         unregister_blkdev(hba[i]->major, hba[i]->devname);
3385       clean1:
3386         hba[i]->busy_initializing = 0;
3387         free_hba(i);
3388         return -1;
3389 }
3390
3391 static void __devexit cciss_remove_one(struct pci_dev *pdev)
3392 {
3393         ctlr_info_t *tmp_ptr;
3394         int i, j;
3395         char flush_buf[4];
3396         int return_code;
3397
3398         if (pci_get_drvdata(pdev) == NULL) {
3399                 printk(KERN_ERR "cciss: Unable to remove device \n");
3400                 return;
3401         }
3402         tmp_ptr = pci_get_drvdata(pdev);
3403         i = tmp_ptr->ctlr;
3404         if (hba[i] == NULL) {
3405                 printk(KERN_ERR "cciss: device appears to "
3406                        "already be removed \n");
3407                 return;
3408         }
3409         /* Turn board interrupts off  and send the flush cache command */
3410         /* sendcmd will turn off interrupt, and send the flush...
3411          * To write all data in the battery backed cache to disks */
3412         memset(flush_buf, 0, 4);
3413         return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
3414                               TYPE_CMD);
3415         if (return_code != IO_OK) {
3416                 printk(KERN_WARNING "Error Flushing cache on controller %d\n",
3417                        i);
3418         }
3419         free_irq(hba[i]->intr[2], hba[i]);
3420
3421 #ifdef CONFIG_PCI_MSI
3422         if (hba[i]->msix_vector)
3423                 pci_disable_msix(hba[i]->pdev);
3424         else if (hba[i]->msi_vector)
3425                 pci_disable_msi(hba[i]->pdev);
3426 #endif                          /* CONFIG_PCI_MSI */
3427
3428         iounmap(hba[i]->vaddr);
3429         cciss_unregister_scsi(i);       /* unhook from SCSI subsystem */
3430         unregister_blkdev(hba[i]->major, hba[i]->devname);
3431         remove_proc_entry(hba[i]->devname, proc_cciss);
3432
3433         /* remove it from the disk list */
3434         for (j = 0; j < NWD; j++) {
3435                 struct gendisk *disk = hba[i]->gendisk[j];
3436                 if (disk) {
3437                         request_queue_t *q = disk->queue;
3438
3439                         if (disk->flags & GENHD_FL_UP)
3440                                 del_gendisk(disk);
3441                         if (q)
3442                                 blk_cleanup_queue(q);
3443                 }
3444         }
3445
3446         pci_free_consistent(hba[i]->pdev, NR_CMDS * sizeof(CommandList_struct),
3447                             hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3448         pci_free_consistent(hba[i]->pdev, NR_CMDS * sizeof(ErrorInfo_struct),
3449                             hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
3450         kfree(hba[i]->cmd_pool_bits);
3451 #ifdef CONFIG_CISS_SCSI_TAPE
3452         kfree(hba[i]->scsi_rejects.complete);
3453 #endif
3454         pci_release_regions(pdev);
3455         pci_disable_device(pdev);
3456         pci_set_drvdata(pdev, NULL);
3457         free_hba(i);
3458 }
3459
3460 static struct pci_driver cciss_pci_driver = {
3461         .name = "cciss",
3462         .probe = cciss_init_one,
3463         .remove = __devexit_p(cciss_remove_one),
3464         .id_table = cciss_pci_device_id,        /* id_table */
3465 };
3466
3467 /*
3468  *  This is it.  Register the PCI driver information for the cards we control
3469  *  the OS will call our registered routines when it finds one of our cards.
3470  */
3471 static int __init cciss_init(void)
3472 {
3473         printk(KERN_INFO DRIVER_NAME "\n");
3474
3475         /* Register for our PCI devices */
3476         return pci_register_driver(&cciss_pci_driver);
3477 }
3478
3479 static void __exit cciss_cleanup(void)
3480 {
3481         int i;
3482
3483         pci_unregister_driver(&cciss_pci_driver);
3484         /* double check that all controller entrys have been removed */
3485         for (i = 0; i < MAX_CTLR; i++) {
3486                 if (hba[i] != NULL) {
3487                         printk(KERN_WARNING "cciss: had to remove"
3488                                " controller %d\n", i);
3489                         cciss_remove_one(hba[i]->pdev);
3490                 }
3491         }
3492         remove_proc_entry("cciss", proc_root_driver);
3493 }
3494
3495 static void fail_all_cmds(unsigned long ctlr)
3496 {
3497         /* If we get here, the board is apparently dead. */
3498         ctlr_info_t *h = hba[ctlr];
3499         CommandList_struct *c;
3500         unsigned long flags;
3501
3502         printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
3503         h->alive = 0;           /* the controller apparently died... */
3504
3505         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
3506
3507         pci_disable_device(h->pdev);    /* Make sure it is really dead. */
3508
3509         /* move everything off the request queue onto the completed queue */
3510         while ((c = h->reqQ) != NULL) {
3511                 removeQ(&(h->reqQ), c);
3512                 h->Qdepth--;
3513                 addQ(&(h->cmpQ), c);
3514         }
3515
3516         /* Now, fail everything on the completed queue with a HW error */
3517         while ((c = h->cmpQ) != NULL) {
3518                 removeQ(&h->cmpQ, c);
3519                 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
3520                 if (c->cmd_type == CMD_RWREQ) {
3521                         complete_command(h, c, 0);
3522                 } else if (c->cmd_type == CMD_IOCTL_PEND)
3523                         complete(c->waiting);
3524 #ifdef CONFIG_CISS_SCSI_TAPE
3525                 else if (c->cmd_type == CMD_SCSI)
3526                         complete_scsi_command(c, 0, 0);
3527 #endif
3528         }
3529         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
3530         return;
3531 }
3532
3533 module_init(cciss_init);
3534 module_exit(cciss_cleanup);