git.oblomov.eu Git - linux-2.6/blob - drivers/block/cciss.c

   1 /*
   2  *    Disk Array driver for HP SA 5xxx and 6xxx Controllers
   3  *    Copyright 2000, 2005 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/config.h>       /* CONFIG_PROC_FS */
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/types.h>
  27 #include <linux/pci.h>
  28 #include <linux/kernel.h>
  29 #include <linux/slab.h>
  30 #include <linux/delay.h>
  31 #include <linux/major.h>
  32 #include <linux/fs.h>
  33 #include <linux/bio.h>
  34 #include <linux/blkpg.h>
  35 #include <linux/timer.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/init.h>
  38 #include <linux/hdreg.h>
  39 #include <linux/spinlock.h>
  40 #include <linux/compat.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 2.6.8)"
  51 #define DRIVER_VERSION CCISS_DRIVER_VERSION(2,6,8)
  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 2.6.8");
  56 MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
  57                         " SA6i P600 P800 P400 P400i E200 E200i");
  58 MODULE_LICENSE("GPL");
  59
  60 #include "cciss_cmd.h"
  61 #include "cciss.h"
  62 #include <linux/cciss_ioctl.h>
  63
  64 /* define the PCI info for the cards we can control */
  65 static const struct pci_device_id cciss_pci_device_id[] = {
  66         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS,
  67                         0x0E11, 0x4070, 0, 0, 0},
  68         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB,
  69                         0x0E11, 0x4080, 0, 0, 0},
  70         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB,
  71                         0x0E11, 0x4082, 0, 0, 0},
  72         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB,
  73                         0x0E11, 0x4083, 0, 0, 0},
  74         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC,
  75                 0x0E11, 0x409A, 0, 0, 0},
  76         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC,
  77                 0x0E11, 0x409B, 0, 0, 0},
  78         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC,
  79                 0x0E11, 0x409C, 0, 0, 0},
  80         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC,
  81                 0x0E11, 0x409D, 0, 0, 0},
  82         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC,
  83                 0x0E11, 0x4091, 0, 0, 0},
  84         { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA,
  85                 0x103C, 0x3225, 0, 0, 0},
  86         { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC,
  87                 0x103c, 0x3223, 0, 0, 0},
  88         { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC,
  89                 0x103c, 0x3234, 0, 0, 0},
  90         { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC,
  91                 0x103c, 0x3235, 0, 0, 0},
  92         { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD,
  93                 0x103c, 0x3211, 0, 0, 0},
  94         { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD,
  95                 0x103c, 0x3212, 0, 0, 0},
  96         { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD,
  97                 0x103c, 0x3213, 0, 0, 0},
  98         { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD,
  99                 0x103c, 0x3214, 0, 0, 0},
 100         { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD,
 101                 0x103c, 0x3215, 0, 0, 0},
 102         {0,}
 103 };
 104 MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
 105
 106 #define NR_PRODUCTS (sizeof(products)/sizeof(struct board_type))
 107
 108 /*  board_id = Subsystem Device ID & Vendor ID
 109  *  product = Marketing Name for the board
 110  *  access = Address of the struct of function pointers
 111  */
 112 static struct board_type products[] = {
 113         { 0x40700E11, "Smart Array 5300", &SA5_access },
 114         { 0x40800E11, "Smart Array 5i", &SA5B_access},
 115         { 0x40820E11, "Smart Array 532", &SA5B_access},
 116         { 0x40830E11, "Smart Array 5312", &SA5B_access},
 117         { 0x409A0E11, "Smart Array 641", &SA5_access},
 118         { 0x409B0E11, "Smart Array 642", &SA5_access},
 119         { 0x409C0E11, "Smart Array 6400", &SA5_access},
 120         { 0x409D0E11, "Smart Array 6400 EM", &SA5_access},
 121         { 0x40910E11, "Smart Array 6i", &SA5_access},
 122         { 0x3225103C, "Smart Array P600", &SA5_access},
 123         { 0x3223103C, "Smart Array P800", &SA5_access},
 124         { 0x3234103C, "Smart Array P400", &SA5_access},
 125         { 0x3235103C, "Smart Array P400i", &SA5_access},
 126         { 0x3211103C, "Smart Array E200i", &SA5_access},
 127         { 0x3212103C, "Smart Array E200", &SA5_access},
 128         { 0x3213103C, "Smart Array E200i", &SA5_access},
 129         { 0x3214103C, "Smart Array E200i", &SA5_access},
 130         { 0x3215103C, "Smart Array E200i", &SA5_access},
 131 };
 132
 133 /* How long to wait (in millesconds) for board to go into simple mode */
 134 #define MAX_CONFIG_WAIT 30000
 135 #define MAX_IOCTL_CONFIG_WAIT 1000
 136
 137 /*define how many times we will try a command because of bus resets */
 138 #define MAX_CMD_RETRIES 3
 139
 140 #define READ_AHEAD       1024
 141 #define NR_CMDS          384 /* #commands that can be outstanding */
 142 #define MAX_CTLR        32
 143
 144 /* Originally cciss driver only supports 8 major numbers */
 145 #define MAX_CTLR_ORIG   8
 146
 147
 148 static ctlr_info_t *hba[MAX_CTLR];
 149
 150 static void do_cciss_request(request_queue_t *q);
 151 static int cciss_open(struct inode *inode, struct file *filep);
 152 static int cciss_release(struct inode *inode, struct file *filep);
 153 static int cciss_ioctl(struct inode *inode, struct file *filep,
 154                 unsigned int cmd, unsigned long arg);
 155
 156 static int revalidate_allvol(ctlr_info_t *host);
 157 static int cciss_revalidate(struct gendisk *disk);
 158 static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk);
 159 static int deregister_disk(struct gendisk *disk, drive_info_struct *drv, int clear_all);
 160
 161 static void cciss_read_capacity(int ctlr, int logvol, ReadCapdata_struct *buf,
 162         int withirq, unsigned int *total_size, unsigned int *block_size);
 163 static void cciss_geometry_inquiry(int ctlr, int logvol,
 164                         int withirq, unsigned int total_size,
 165                         unsigned int block_size, InquiryData_struct *inq_buff,
 166                         drive_info_struct *drv);
 167 static void cciss_getgeometry(int cntl_num);
 168
 169 static void start_io( ctlr_info_t *h);
 170 static int sendcmd( __u8 cmd, int ctlr, void *buff, size_t size,
 171         unsigned int use_unit_num, unsigned int log_unit, __u8 page_code,
 172         unsigned char *scsi3addr, int cmd_type);
 173 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
 174         unsigned int use_unit_num, unsigned int log_unit, __u8  page_code,
 175         int cmd_type);
 176
 177 static void fail_all_cmds(unsigned long ctlr);
 178
 179 #ifdef CONFIG_PROC_FS
 180 static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
 181                 int length, int *eof, void *data);
 182 static void cciss_procinit(int i);
 183 #else
 184 static void cciss_procinit(int i) {}
 185 #endif /* CONFIG_PROC_FS */
 186
 187 #ifdef CONFIG_COMPAT
 188 static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
 189 #endif
 190
 191 static struct block_device_operations cciss_fops  = {
 192         .owner          = THIS_MODULE,
 193         .open           = cciss_open,
 194         .release        = cciss_release,
 195         .ioctl          = cciss_ioctl,
 196 #ifdef CONFIG_COMPAT
 197         .compat_ioctl   = cciss_compat_ioctl,
 198 #endif
 199         .revalidate_disk= cciss_revalidate,
 200 };
 201
 202 /*
 203  * Enqueuing and dequeuing functions for cmdlists.
 204  */
 205 static inline void addQ(CommandList_struct **Qptr, CommandList_struct *c)
 206 {
 207         if (*Qptr == NULL) {
 208                 *Qptr = c;
 209                 c->next = c->prev = c;
 210         } else {
 211                 c->prev = (*Qptr)->prev;
 212                 c->next = (*Qptr);
 213                 (*Qptr)->prev->next = c;
 214                 (*Qptr)->prev = c;
 215         }
 216 }
 217
 218 static inline CommandList_struct *removeQ(CommandList_struct **Qptr,
 219                                                 CommandList_struct *c)
 220 {
 221         if (c && c->next != c) {
 222                 if (*Qptr == c) *Qptr = c->next;
 223                 c->prev->next = c->next;
 224                 c->next->prev = c->prev;
 225         } else {
 226                 *Qptr = NULL;
 227         }
 228         return c;
 229 }
 230
 231 #include "cciss_scsi.c"         /* For SCSI tape support */
 232
 233 #ifdef CONFIG_PROC_FS
 234
 235 /*
 236  * Report information about this controller.
 237  */
 238 #define ENG_GIG 1000000000
 239 #define ENG_GIG_FACTOR (ENG_GIG/512)
 240 #define RAID_UNKNOWN 6
 241 static const char *raid_label[] = {"0","4","1(1+0)","5","5+1","ADG",
 242                                            "UNKNOWN"};
 243
 244 static struct proc_dir_entry *proc_cciss;
 245
 246 static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
 247                 int length, int *eof, void *data)
 248 {
 249         off_t pos = 0;
 250         off_t len = 0;
 251         int size, i, ctlr;
 252         ctlr_info_t *h = (ctlr_info_t*)data;
 253         drive_info_struct *drv;
 254         unsigned long flags;
 255         sector_t vol_sz, vol_sz_frac;
 256
 257         ctlr = h->ctlr;
 258
 259         /* prevent displaying bogus info during configuration
 260          * or deconfiguration of a logical volume
 261          */
 262         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
 263         if (h->busy_configuring) {
 264                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 265         return -EBUSY;
 266         }
 267         h->busy_configuring = 1;
 268         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 269
 270         size = sprintf(buffer, "%s: HP %s Controller\n"
 271                 "Board ID: 0x%08lx\n"
 272                 "Firmware Version: %c%c%c%c\n"
 273                 "IRQ: %d\n"
 274                 "Logical drives: %d\n"
 275                 "Current Q depth: %d\n"
 276                 "Current # commands on controller: %d\n"
 277                 "Max Q depth since init: %d\n"
 278                 "Max # commands on controller since init: %d\n"
 279                 "Max SG entries since init: %d\n\n",
 280                 h->devname,
 281                 h->product_name,
 282                 (unsigned long)h->board_id,
 283                 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2], h->firm_ver[3],
 284                 (unsigned int)h->intr,
 285                 h->num_luns,
 286                 h->Qdepth, h->commands_outstanding,
 287                 h->maxQsinceinit, h->max_outstanding, h->maxSG);
 288
 289         pos += size; len += size;
 290         cciss_proc_tape_report(ctlr, buffer, &pos, &len);
 291         for(i=0; i<=h->highest_lun; i++) {
 292
 293                 drv = &h->drv[i];
 294                 if (drv->heads == 0)
 295                         continue;
 296
 297                 vol_sz = drv->nr_blocks;
 298                 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
 299                 vol_sz_frac *= 100;
 300                 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
 301
 302                 if (drv->raid_level > 5)
 303                         drv->raid_level = RAID_UNKNOWN;
 304                 size = sprintf(buffer+len, "cciss/c%dd%d:"
 305                                 "\t%4u.%02uGB\tRAID %s\n",
 306                                 ctlr, i, (int)vol_sz, (int)vol_sz_frac,
 307                                 raid_label[drv->raid_level]);
 308                 pos += size; len += size;
 309         }
 310
 311         *eof = 1;
 312         *start = buffer+offset;
 313         len -= offset;
 314         if (len>length)
 315                 len = length;
 316         h->busy_configuring = 0;
 317         return len;
 318 }
 319
 320 static int
 321 cciss_proc_write(struct file *file, const char __user *buffer,
 322                         unsigned long count, void *data)
 323 {
 324         unsigned char cmd[80];
 325         int len;
 326 #ifdef CONFIG_CISS_SCSI_TAPE
 327         ctlr_info_t *h = (ctlr_info_t *) data;
 328         int rc;
 329 #endif
 330
 331         if (count > sizeof(cmd)-1) return -EINVAL;
 332         if (copy_from_user(cmd, buffer, count)) return -EFAULT;
 333         cmd[count] = '\0';
 334         len = strlen(cmd);      // above 3 lines ensure safety
 335         if (len && cmd[len-1] == '\n')
 336                 cmd[--len] = '\0';
 337 #       ifdef CONFIG_CISS_SCSI_TAPE
 338                 if (strcmp("engage scsi", cmd)==0) {
 339                         rc = cciss_engage_scsi(h->ctlr);
 340                         if (rc != 0) return -rc;
 341                         return count;
 342                 }
 343                 /* might be nice to have "disengage" too, but it's not
 344                    safely possible. (only 1 module use count, lock issues.) */
 345 #       endif
 346         return -EINVAL;
 347 }
 348
 349 /*
 350  * Get us a file in /proc/cciss that says something about each controller.
 351  * Create /proc/cciss if it doesn't exist yet.
 352  */
 353 static void __devinit cciss_procinit(int i)
 354 {
 355         struct proc_dir_entry *pde;
 356
 357         if (proc_cciss == NULL) {
 358                 proc_cciss = proc_mkdir("cciss", proc_root_driver);
 359                 if (!proc_cciss)
 360                         return;
 361         }
 362
 363         pde = create_proc_read_entry(hba[i]->devname,
 364                 S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH,
 365                 proc_cciss, cciss_proc_get_info, hba[i]);
 366         pde->write_proc = cciss_proc_write;
 367 }
 368 #endif /* CONFIG_PROC_FS */
 369
 370 /*
 371  * For operations that cannot sleep, a command block is allocated at init,
 372  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
 373  * which ones are free or in use.  For operations that can wait for kmalloc
 374  * to possible sleep, this routine can be called with get_from_pool set to 0.
 375  * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
 376  */
 377 static CommandList_struct * cmd_alloc(ctlr_info_t *h, int get_from_pool)
 378 {
 379         CommandList_struct *c;
 380         int i;
 381         u64bit temp64;
 382         dma_addr_t cmd_dma_handle, err_dma_handle;
 383
 384         if (!get_from_pool)
 385         {
 386                 c = (CommandList_struct *) pci_alloc_consistent(
 387                         h->pdev, sizeof(CommandList_struct), &cmd_dma_handle);
 388                 if(c==NULL)
 389                         return NULL;
 390                 memset(c, 0, sizeof(CommandList_struct));
 391
 392                 c->cmdindex = -1;
 393
 394                 c->err_info = (ErrorInfo_struct *)pci_alloc_consistent(
 395                                         h->pdev, sizeof(ErrorInfo_struct),
 396                                         &err_dma_handle);
 397
 398                 if (c->err_info == NULL)
 399                 {
 400                         pci_free_consistent(h->pdev,
 401                                 sizeof(CommandList_struct), c, cmd_dma_handle);
 402                         return NULL;
 403                 }
 404                 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
 405         } else /* get it out of the controllers pool */
 406         {
 407                 do {
 408                         i = find_first_zero_bit(h->cmd_pool_bits, NR_CMDS);
 409                         if (i == NR_CMDS)
 410                                 return NULL;
 411                 } while(test_and_set_bit(i & (BITS_PER_LONG - 1), h->cmd_pool_bits+(i/BITS_PER_LONG)) != 0);
 412 #ifdef CCISS_DEBUG
 413                 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
 414 #endif
 415                 c = h->cmd_pool + i;
 416                 memset(c, 0, sizeof(CommandList_struct));
 417                 cmd_dma_handle = h->cmd_pool_dhandle
 418                                         + i*sizeof(CommandList_struct);
 419                 c->err_info = h->errinfo_pool + i;
 420                 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
 421                 err_dma_handle = h->errinfo_pool_dhandle
 422                                         + i*sizeof(ErrorInfo_struct);
 423                 h->nr_allocs++;
 424
 425                 c->cmdindex = i;
 426         }
 427
 428         c->busaddr = (__u32) cmd_dma_handle;
 429         temp64.val = (__u64) err_dma_handle;
 430         c->ErrDesc.Addr.lower = temp64.val32.lower;
 431         c->ErrDesc.Addr.upper = temp64.val32.upper;
 432         c->ErrDesc.Len = sizeof(ErrorInfo_struct);
 433
 434         c->ctlr = h->ctlr;
 435         return c;
 436
 437
 438 }
 439
 440 /*
 441  * Frees a command block that was previously allocated with cmd_alloc().
 442  */
 443 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
 444 {
 445         int i;
 446         u64bit temp64;
 447
 448         if( !got_from_pool)
 449         {
 450                 temp64.val32.lower = c->ErrDesc.Addr.lower;
 451                 temp64.val32.upper = c->ErrDesc.Addr.upper;
 452                 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
 453                         c->err_info, (dma_addr_t) temp64.val);
 454                 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
 455                         c, (dma_addr_t) c->busaddr);
 456         } else
 457         {
 458                 i = c - h->cmd_pool;
 459                 clear_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG));
 460                 h->nr_frees++;
 461         }
 462 }
 463
 464 static inline ctlr_info_t *get_host(struct gendisk *disk)
 465 {
 466         return disk->queue->queuedata;
 467 }
 468
 469 static inline drive_info_struct *get_drv(struct gendisk *disk)
 470 {
 471         return disk->private_data;
 472 }
 473
 474 /*
 475  * Open.  Make sure the device is really there.
 476  */
 477 static int cciss_open(struct inode *inode, struct file *filep)
 478 {
 479         ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
 480         drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk);
 481
 482 #ifdef CCISS_DEBUG
 483         printk(KERN_DEBUG "cciss_open %s\n", inode->i_bdev->bd_disk->disk_name);
 484 #endif /* CCISS_DEBUG */
 485
 486         if (host->busy_initializing || drv->busy_configuring)
 487                 return -EBUSY;
 488         /*
 489          * Root is allowed to open raw volume zero even if it's not configured
 490          * so array config can still work. Root is also allowed to open any
 491          * volume that has a LUN ID, so it can issue IOCTL to reread the
 492          * disk information.  I don't think I really like this
 493          * but I'm already using way to many device nodes to claim another one
 494          * for "raw controller".
 495          */
 496         if (drv->nr_blocks == 0) {
 497                 if (iminor(inode) != 0) {       /* not node 0? */
 498                         /* if not node 0 make sure it is a partition = 0 */
 499                         if (iminor(inode) & 0x0f) {
 500                         return -ENXIO;
 501                                 /* if it is, make sure we have a LUN ID */
 502                         } else if (drv->LunID == 0) {
 503                                 return -ENXIO;
 504                         }
 505                 }
 506                 if (!capable(CAP_SYS_ADMIN))
 507                         return -EPERM;
 508         }
 509         drv->usage_count++;
 510         host->usage_count++;
 511         return 0;
 512 }
 513 /*
 514  * Close.  Sync first.
 515  */
 516 static int cciss_release(struct inode *inode, struct file *filep)
 517 {
 518         ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
 519         drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk);
 520
 521 #ifdef CCISS_DEBUG
 522         printk(KERN_DEBUG "cciss_release %s\n", inode->i_bdev->bd_disk->disk_name);
 523 #endif /* CCISS_DEBUG */
 524
 525         drv->usage_count--;
 526         host->usage_count--;
 527         return 0;
 528 }
 529
 530 #ifdef CONFIG_COMPAT
 531
 532 static int do_ioctl(struct file *f, unsigned cmd, unsigned long arg)
 533 {
 534         int ret;
 535         lock_kernel();
 536         ret = cciss_ioctl(f->f_dentry->d_inode, f, cmd, arg);
 537         unlock_kernel();
 538         return ret;
 539 }
 540
 541 static int cciss_ioctl32_passthru(struct file *f, unsigned cmd, unsigned long arg);
 542 static int cciss_ioctl32_big_passthru(struct file *f, unsigned cmd, unsigned long arg);
 543
 544 static long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg)
 545 {
 546         switch (cmd) {
 547         case CCISS_GETPCIINFO:
 548         case CCISS_GETINTINFO:
 549         case CCISS_SETINTINFO:
 550         case CCISS_GETNODENAME:
 551         case CCISS_SETNODENAME:
 552         case CCISS_GETHEARTBEAT:
 553         case CCISS_GETBUSTYPES:
 554         case CCISS_GETFIRMVER:
 555         case CCISS_GETDRIVVER:
 556         case CCISS_REVALIDVOLS:
 557         case CCISS_DEREGDISK:
 558         case CCISS_REGNEWDISK:
 559         case CCISS_REGNEWD:
 560         case CCISS_RESCANDISK:
 561         case CCISS_GETLUNINFO:
 562                 return do_ioctl(f, cmd, arg);
 563
 564         case CCISS_PASSTHRU32:
 565                 return cciss_ioctl32_passthru(f, cmd, arg);
 566         case CCISS_BIG_PASSTHRU32:
 567                 return cciss_ioctl32_big_passthru(f, cmd, arg);
 568
 569         default:
 570                 return -ENOIOCTLCMD;
 571         }
 572 }
 573
 574 static int cciss_ioctl32_passthru(struct file *f, unsigned cmd, 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 |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info, sizeof(arg64.LUN_info));
 585         err |= copy_from_user(&arg64.Request, &arg32->Request, sizeof(arg64.Request));
 586         err |= copy_from_user(&arg64.error_info, &arg32->error_info, sizeof(arg64.error_info));
 587         err |= get_user(arg64.buf_size, &arg32->buf_size);
 588         err |= get_user(cp, &arg32->buf);
 589         arg64.buf = compat_ptr(cp);
 590         err |= copy_to_user(p, &arg64, sizeof(arg64));
 591
 592         if (err)
 593                 return -EFAULT;
 594
 595         err = do_ioctl(f, CCISS_PASSTHRU, (unsigned long) p);
 596         if (err)
 597                 return err;
 598         err |= copy_in_user(&arg32->error_info, &p->error_info, sizeof(arg32->error_info));
 599         if (err)
 600                 return -EFAULT;
 601         return err;
 602 }
 603
 604 static int cciss_ioctl32_big_passthru(struct file *file, unsigned cmd, unsigned long arg)
 605 {
 606         BIG_IOCTL32_Command_struct __user *arg32 =
 607                 (BIG_IOCTL32_Command_struct __user *) arg;
 608         BIG_IOCTL_Command_struct arg64;
 609         BIG_IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
 610         int err;
 611         u32 cp;
 612
 613         err = 0;
 614         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info, sizeof(arg64.LUN_info));
 615         err |= copy_from_user(&arg64.Request, &arg32->Request, sizeof(arg64.Request));
 616         err |= copy_from_user(&arg64.error_info, &arg32->error_info, sizeof(arg64.error_info));
 617         err |= get_user(arg64.buf_size, &arg32->buf_size);
 618         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
 619         err |= get_user(cp, &arg32->buf);
 620         arg64.buf = compat_ptr(cp);
 621         err |= copy_to_user(p, &arg64, sizeof(arg64));
 622
 623         if (err)
 624                  return -EFAULT;
 625
 626         err = do_ioctl(file, CCISS_BIG_PASSTHRU, (unsigned long) p);
 627         if (err)
 628                 return err;
 629         err |= copy_in_user(&arg32->error_info, &p->error_info, sizeof(arg32->error_info));
 630         if (err)
 631                 return -EFAULT;
 632         return err;
 633 }
 634 #endif
 635 /*
 636  * ioctl
 637  */
 638 static int cciss_ioctl(struct inode *inode, struct file *filep,
 639                 unsigned int cmd, unsigned long arg)
 640 {
 641         struct block_device *bdev = inode->i_bdev;
 642         struct gendisk *disk = bdev->bd_disk;
 643         ctlr_info_t *host = get_host(disk);
 644         drive_info_struct *drv = get_drv(disk);
 645         int ctlr = host->ctlr;
 646         void __user *argp = (void __user *)arg;
 647
 648 #ifdef CCISS_DEBUG
 649         printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
 650 #endif /* CCISS_DEBUG */
 651
 652         switch(cmd) {
 653         case HDIO_GETGEO:
 654         {
 655                 struct hd_geometry driver_geo;
 656                 if (drv->cylinders) {
 657                         driver_geo.heads = drv->heads;
 658                         driver_geo.sectors = drv->sectors;
 659                         driver_geo.cylinders = drv->cylinders;
 660                 } else
 661                         return -ENXIO;
 662                 driver_geo.start= get_start_sect(inode->i_bdev);
 663                 if (copy_to_user(argp, &driver_geo, sizeof(struct hd_geometry)))
 664                         return  -EFAULT;
 665                 return(0);
 666         }
 667
 668         case CCISS_GETPCIINFO:
 669         {
 670                 cciss_pci_info_struct pciinfo;
 671
 672                 if (!arg) return -EINVAL;
 673                 pciinfo.domain = pci_domain_nr(host->pdev->bus);
 674                 pciinfo.bus = host->pdev->bus->number;
 675                 pciinfo.dev_fn = host->pdev->devfn;
 676                 pciinfo.board_id = host->board_id;
 677                 if (copy_to_user(argp, &pciinfo,  sizeof( cciss_pci_info_struct )))
 678                         return  -EFAULT;
 679                 return(0);
 680         }
 681         case CCISS_GETINTINFO:
 682         {
 683                 cciss_coalint_struct intinfo;
 684                 if (!arg) return -EINVAL;
 685                 intinfo.delay = readl(&host->cfgtable->HostWrite.CoalIntDelay);
 686                 intinfo.count = readl(&host->cfgtable->HostWrite.CoalIntCount);
 687                 if (copy_to_user(argp, &intinfo, sizeof( cciss_coalint_struct )))
 688                         return -EFAULT;
 689                 return(0);
 690         }
 691         case CCISS_SETINTINFO:
 692         {
 693                 cciss_coalint_struct intinfo;
 694                 unsigned long flags;
 695                 int i;
 696
 697                 if (!arg) return -EINVAL;
 698                 if (!capable(CAP_SYS_ADMIN)) return -EPERM;
 699                 if (copy_from_user(&intinfo, argp, sizeof( cciss_coalint_struct)))
 700                         return -EFAULT;
 701                 if ( (intinfo.delay == 0 ) && (intinfo.count == 0))
 702
 703                 {
 704 //                      printk("cciss_ioctl: delay and count cannot be 0\n");
 705                         return( -EINVAL);
 706                 }
 707                 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
 708                 /* Update the field, and then ring the doorbell */
 709                 writel( intinfo.delay,
 710                         &(host->cfgtable->HostWrite.CoalIntDelay));
 711                 writel( intinfo.count,
 712                         &(host->cfgtable->HostWrite.CoalIntCount));
 713                 writel( CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
 714
 715                 for(i=0;i<MAX_IOCTL_CONFIG_WAIT;i++) {
 716                         if (!(readl(host->vaddr + SA5_DOORBELL)
 717                                         & CFGTBL_ChangeReq))
 718                                 break;
 719                         /* delay and try again */
 720                         udelay(1000);
 721                 }
 722                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 723                 if (i >= MAX_IOCTL_CONFIG_WAIT)
 724                         return -EAGAIN;
 725                 return(0);
 726         }
 727         case CCISS_GETNODENAME:
 728         {
 729                 NodeName_type NodeName;
 730                 int i;
 731
 732                 if (!arg) return -EINVAL;
 733                 for(i=0;i<16;i++)
 734                         NodeName[i] = readb(&host->cfgtable->ServerName[i]);
 735                 if (copy_to_user(argp, NodeName, sizeof( NodeName_type)))
 736                         return  -EFAULT;
 737                 return(0);
 738         }
 739         case CCISS_SETNODENAME:
 740         {
 741                 NodeName_type NodeName;
 742                 unsigned long flags;
 743                 int i;
 744
 745                 if (!arg) return -EINVAL;
 746                 if (!capable(CAP_SYS_ADMIN)) return -EPERM;
 747
 748                 if (copy_from_user(NodeName, argp, sizeof( NodeName_type)))
 749                         return -EFAULT;
 750
 751                 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
 752
 753                         /* Update the field, and then ring the doorbell */
 754                 for(i=0;i<16;i++)
 755                         writeb( NodeName[i], &host->cfgtable->ServerName[i]);
 756
 757                 writel( CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
 758
 759                 for(i=0;i<MAX_IOCTL_CONFIG_WAIT;i++) {
 760                         if (!(readl(host->vaddr + SA5_DOORBELL)
 761                                         & CFGTBL_ChangeReq))
 762                                 break;
 763                         /* delay and try again */
 764                         udelay(1000);
 765                 }
 766                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 767                 if (i >= MAX_IOCTL_CONFIG_WAIT)
 768                         return -EAGAIN;
 769                 return(0);
 770         }
 771
 772         case CCISS_GETHEARTBEAT:
 773         {
 774                 Heartbeat_type heartbeat;
 775
 776                 if (!arg) return -EINVAL;
 777                 heartbeat = readl(&host->cfgtable->HeartBeat);
 778                 if (copy_to_user(argp, &heartbeat, sizeof( Heartbeat_type)))
 779                         return -EFAULT;
 780                 return(0);
 781         }
 782         case CCISS_GETBUSTYPES:
 783         {
 784                 BusTypes_type BusTypes;
 785
 786                 if (!arg) return -EINVAL;
 787                 BusTypes = readl(&host->cfgtable->BusTypes);
 788                 if (copy_to_user(argp, &BusTypes, sizeof( BusTypes_type) ))
 789                         return  -EFAULT;
 790                 return(0);
 791         }
 792         case CCISS_GETFIRMVER:
 793         {
 794                 FirmwareVer_type firmware;
 795
 796                 if (!arg) return -EINVAL;
 797                 memcpy(firmware, host->firm_ver, 4);
 798
 799                 if (copy_to_user(argp, firmware, sizeof( FirmwareVer_type)))
 800                         return -EFAULT;
 801                 return(0);
 802         }
 803         case CCISS_GETDRIVVER:
 804         {
 805                 DriverVer_type DriverVer = DRIVER_VERSION;
 806
 807                 if (!arg) return -EINVAL;
 808
 809                 if (copy_to_user(argp, &DriverVer, sizeof( DriverVer_type) ))
 810                         return -EFAULT;
 811                 return(0);
 812         }
 813
 814         case CCISS_REVALIDVOLS:
 815                 if (bdev != bdev->bd_contains || drv != host->drv)
 816                         return -ENXIO;
 817                 return revalidate_allvol(host);
 818
 819         case CCISS_GETLUNINFO: {
 820                 LogvolInfo_struct luninfo;
 821
 822                 luninfo.LunID = drv->LunID;
 823                 luninfo.num_opens = drv->usage_count;
 824                 luninfo.num_parts = 0;
 825                 if (copy_to_user(argp, &luninfo,
 826                                 sizeof(LogvolInfo_struct)))
 827                         return -EFAULT;
 828                 return(0);
 829         }
 830         case CCISS_DEREGDISK:
 831                 return rebuild_lun_table(host, disk);
 832
 833         case CCISS_REGNEWD:
 834                 return rebuild_lun_table(host, NULL);
 835
 836         case CCISS_PASSTHRU:
 837         {
 838                 IOCTL_Command_struct iocommand;
 839                 CommandList_struct *c;
 840                 char    *buff = NULL;
 841                 u64bit  temp64;
 842                 unsigned long flags;
 843                 DECLARE_COMPLETION(wait);
 844
 845                 if (!arg) return -EINVAL;
 846
 847                 if (!capable(CAP_SYS_RAWIO)) return -EPERM;
 848
 849                 if (copy_from_user(&iocommand, argp, sizeof( IOCTL_Command_struct) ))
 850                         return -EFAULT;
 851                 if((iocommand.buf_size < 1) &&
 852                                 (iocommand.Request.Type.Direction != XFER_NONE))
 853                 {
 854                         return -EINVAL;
 855                 }
 856 #if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
 857                 /* Check kmalloc limits */
 858                 if(iocommand.buf_size > 128000)
 859                         return -EINVAL;
 860 #endif
 861                 if(iocommand.buf_size > 0)
 862                 {
 863                         buff =  kmalloc(iocommand.buf_size, GFP_KERNEL);
 864                         if( buff == NULL)
 865                                 return -EFAULT;
 866                 }
 867                 if (iocommand.Request.Type.Direction == XFER_WRITE)
 868                 {
 869                         /* Copy the data into the buffer we created */
 870                         if (copy_from_user(buff, iocommand.buf, iocommand.buf_size))
 871                         {
 872                                 kfree(buff);
 873                                 return -EFAULT;
 874                         }
 875                 } else {
 876                         memset(buff, 0, iocommand.buf_size);
 877                 }
 878                 if ((c = cmd_alloc(host , 0)) == NULL)
 879                 {
 880                         kfree(buff);
 881                         return -ENOMEM;
 882                 }
 883                         // Fill in the command type
 884                 c->cmd_type = CMD_IOCTL_PEND;
 885                         // Fill in Command Header
 886                 c->Header.ReplyQueue = 0;  // unused in simple mode
 887                 if( iocommand.buf_size > 0)     // buffer to fill
 888                 {
 889                         c->Header.SGList = 1;
 890                         c->Header.SGTotal= 1;
 891                 } else  // no buffers to fill
 892                 {
 893                         c->Header.SGList = 0;
 894                         c->Header.SGTotal= 0;
 895                 }
 896                 c->Header.LUN = iocommand.LUN_info;
 897                 c->Header.Tag.lower = c->busaddr;  // use the kernel address the cmd block for tag
 898
 899                 // Fill in Request block
 900                 c->Request = iocommand.Request;
 901
 902                 // Fill in the scatter gather information
 903                 if (iocommand.buf_size > 0 )
 904                 {
 905                         temp64.val = pci_map_single( host->pdev, buff,
 906                                         iocommand.buf_size,
 907                                 PCI_DMA_BIDIRECTIONAL);
 908                         c->SG[0].Addr.lower = temp64.val32.lower;
 909                         c->SG[0].Addr.upper = temp64.val32.upper;
 910                         c->SG[0].Len = iocommand.buf_size;
 911                         c->SG[0].Ext = 0;  // we are not chaining
 912                 }
 913                 c->waiting = &wait;
 914
 915                 /* Put the request on the tail of the request queue */
 916                 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
 917                 addQ(&host->reqQ, c);
 918                 host->Qdepth++;
 919                 start_io(host);
 920                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 921
 922                 wait_for_completion(&wait);
 923
 924                 /* unlock the buffers from DMA */
 925                 temp64.val32.lower = c->SG[0].Addr.lower;
 926                 temp64.val32.upper = c->SG[0].Addr.upper;
 927                 pci_unmap_single( host->pdev, (dma_addr_t) temp64.val,
 928                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
 929
 930                 /* Copy the error information out */
 931                 iocommand.error_info = *(c->err_info);
 932                 if ( copy_to_user(argp, &iocommand, sizeof( IOCTL_Command_struct) ) )
 933                 {
 934                         kfree(buff);
 935                         cmd_free(host, c, 0);
 936                         return( -EFAULT);
 937                 }
 938
 939                 if (iocommand.Request.Type.Direction == XFER_READ)
 940                 {
 941                         /* Copy the data out of the buffer we created */
 942                         if (copy_to_user(iocommand.buf, buff, iocommand.buf_size))
 943                         {
 944                                 kfree(buff);
 945                                 cmd_free(host, c, 0);
 946                                 return -EFAULT;
 947                         }
 948                 }
 949                 kfree(buff);
 950                 cmd_free(host, c, 0);
 951                 return(0);
 952         }
 953         case CCISS_BIG_PASSTHRU: {
 954                 BIG_IOCTL_Command_struct *ioc;
 955                 CommandList_struct *c;
 956                 unsigned char **buff = NULL;
 957                 int     *buff_size = NULL;
 958                 u64bit  temp64;
 959                 unsigned long flags;
 960                 BYTE sg_used = 0;
 961                 int status = 0;
 962                 int i;
 963                 DECLARE_COMPLETION(wait);
 964                 __u32   left;
 965                 __u32   sz;
 966                 BYTE    __user *data_ptr;
 967
 968                 if (!arg)
 969                         return -EINVAL;
 970                 if (!capable(CAP_SYS_RAWIO))
 971                         return -EPERM;
 972                 ioc = (BIG_IOCTL_Command_struct *)
 973                         kmalloc(sizeof(*ioc), GFP_KERNEL);
 974                 if (!ioc) {
 975                         status = -ENOMEM;
 976                         goto cleanup1;
 977                 }
 978                 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
 979                         status = -EFAULT;
 980                         goto cleanup1;
 981                 }
 982                 if ((ioc->buf_size < 1) &&
 983                         (ioc->Request.Type.Direction != XFER_NONE)) {
 984                                 status = -EINVAL;
 985                                 goto cleanup1;
 986                 }
 987                 /* Check kmalloc limits  using all SGs */
 988                 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
 989                         status = -EINVAL;
 990                         goto cleanup1;
 991                 }
 992                 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
 993                         status = -EINVAL;
 994                         goto cleanup1;
 995                 }
 996                 buff = (unsigned char **) kmalloc(MAXSGENTRIES *
 997                                 sizeof(char *), GFP_KERNEL);
 998                 if (!buff) {
 999                         status = -ENOMEM;
1000                         goto cleanup1;
1001                 }
1002                 memset(buff, 0, MAXSGENTRIES);
1003                 buff_size = (int *) kmalloc(MAXSGENTRIES * sizeof(int),
1004                                         GFP_KERNEL);
1005                 if (!buff_size) {
1006                         status = -ENOMEM;
1007                         goto cleanup1;
1008                 }
1009                 left = ioc->buf_size;
1010                 data_ptr = ioc->buf;
1011                 while (left) {
1012                         sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
1013                         buff_size[sg_used] = sz;
1014                         buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1015                         if (buff[sg_used] == NULL) {
1016                                 status = -ENOMEM;
1017                                 goto cleanup1;
1018                         }
1019                         if (ioc->Request.Type.Direction == XFER_WRITE &&
1020                                 copy_from_user(buff[sg_used], data_ptr, sz)) {
1021                                         status = -ENOMEM;
1022                                         goto cleanup1;
1023                         } else {
1024                                 memset(buff[sg_used], 0, sz);
1025                         }
1026                         left -= sz;
1027                         data_ptr += sz;
1028                         sg_used++;
1029                 }
1030                 if ((c = cmd_alloc(host , 0)) == NULL) {
1031                         status = -ENOMEM;
1032                         goto cleanup1;
1033                 }
1034                 c->cmd_type = CMD_IOCTL_PEND;
1035                 c->Header.ReplyQueue = 0;
1036
1037                 if( ioc->buf_size > 0) {
1038                         c->Header.SGList = sg_used;
1039                         c->Header.SGTotal= sg_used;
1040                 } else {
1041                         c->Header.SGList = 0;
1042                         c->Header.SGTotal= 0;
1043                 }
1044                 c->Header.LUN = ioc->LUN_info;
1045                 c->Header.Tag.lower = c->busaddr;
1046
1047                 c->Request = ioc->Request;
1048                 if (ioc->buf_size > 0 ) {
1049                         int i;
1050                         for(i=0; i<sg_used; i++) {
1051                                 temp64.val = pci_map_single( host->pdev, buff[i],
1052                                         buff_size[i],
1053                                         PCI_DMA_BIDIRECTIONAL);
1054                                 c->SG[i].Addr.lower = temp64.val32.lower;
1055                                 c->SG[i].Addr.upper = temp64.val32.upper;
1056                                 c->SG[i].Len = buff_size[i];
1057                                 c->SG[i].Ext = 0;  /* we are not chaining */
1058                         }
1059                 }
1060                 c->waiting = &wait;
1061                 /* Put the request on the tail of the request queue */
1062                 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1063                 addQ(&host->reqQ, c);
1064                 host->Qdepth++;
1065                 start_io(host);
1066                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1067                 wait_for_completion(&wait);
1068                 /* unlock the buffers from DMA */
1069                 for(i=0; i<sg_used; i++) {
1070                         temp64.val32.lower = c->SG[i].Addr.lower;
1071                         temp64.val32.upper = c->SG[i].Addr.upper;
1072                         pci_unmap_single( host->pdev, (dma_addr_t) temp64.val,
1073                                 buff_size[i], PCI_DMA_BIDIRECTIONAL);
1074                 }
1075                 /* Copy the error information out */
1076                 ioc->error_info = *(c->err_info);
1077                 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1078                         cmd_free(host, c, 0);
1079                         status = -EFAULT;
1080                         goto cleanup1;
1081                 }
1082                 if (ioc->Request.Type.Direction == XFER_READ) {
1083                         /* Copy the data out of the buffer we created */
1084                         BYTE __user *ptr = ioc->buf;
1085                         for(i=0; i< sg_used; i++) {
1086                                 if (copy_to_user(ptr, buff[i], buff_size[i])) {
1087                                         cmd_free(host, c, 0);
1088                                         status = -EFAULT;
1089                                         goto cleanup1;
1090                                 }
1091                                 ptr += buff_size[i];
1092                         }
1093                 }
1094                 cmd_free(host, c, 0);
1095                 status = 0;
1096 cleanup1:
1097                 if (buff) {
1098                         for(i=0; i<sg_used; i++)
1099                                 kfree(buff[i]);
1100                         kfree(buff);
1101                 }
1102                 kfree(buff_size);
1103                 kfree(ioc);
1104                 return(status);
1105         }
1106         default:
1107                 return -ENOTTY;
1108         }
1109
1110 }
1111
1112 /*
1113  * revalidate_allvol is for online array config utilities.  After a
1114  * utility reconfigures the drives in the array, it can use this function
1115  * (through an ioctl) to make the driver zap any previous disk structs for
1116  * that controller and get new ones.
1117  *
1118  * Right now I'm using the getgeometry() function to do this, but this
1119  * function should probably be finer grained and allow you to revalidate one
1120  * particualar logical volume (instead of all of them on a particular
1121  * controller).
1122  */
1123 static int revalidate_allvol(ctlr_info_t *host)
1124 {
1125         int ctlr = host->ctlr, i;
1126         unsigned long flags;
1127
1128         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1129         if (host->usage_count > 1) {
1130                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1131                 printk(KERN_WARNING "cciss: Device busy for volume"
1132                         " revalidation (usage=%d)\n", host->usage_count);
1133                 return -EBUSY;
1134         }
1135         host->usage_count++;
1136         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1137
1138         for(i=0; i< NWD; i++) {
1139                 struct gendisk *disk = host->gendisk[i];
1140                 if (disk->flags & GENHD_FL_UP)
1141                         del_gendisk(disk);
1142         }
1143
1144         /*
1145          * Set the partition and block size structures for all volumes
1146          * on this controller to zero.  We will reread all of this data
1147          */
1148         memset(host->drv,        0, sizeof(drive_info_struct)
1149                                                 * CISS_MAX_LUN);
1150         /*
1151          * Tell the array controller not to give us any interrupts while
1152          * we check the new geometry.  Then turn interrupts back on when
1153          * we're done.
1154          */
1155         host->access.set_intr_mask(host, CCISS_INTR_OFF);
1156         cciss_getgeometry(ctlr);
1157         host->access.set_intr_mask(host, CCISS_INTR_ON);
1158
1159         /* Loop through each real device */
1160         for (i = 0; i < NWD; i++) {
1161                 struct gendisk *disk = host->gendisk[i];
1162                 drive_info_struct *drv = &(host->drv[i]);
1163                 /* we must register the controller even if no disks exist */
1164                 /* this is for the online array utilities */
1165                 if (!drv->heads && i)
1166                         continue;
1167                 blk_queue_hardsect_size(drv->queue, drv->block_size);
1168                 set_capacity(disk, drv->nr_blocks);
1169                 add_disk(disk);
1170         }
1171         host->usage_count--;
1172         return 0;
1173 }
1174
1175 /* This function will check the usage_count of the drive to be updated/added.
1176  * If the usage_count is zero then the drive information will be updated and
1177  * the disk will be re-registered with the kernel.  If not then it will be
1178  * left alone for the next reboot.  The exception to this is disk 0 which
1179  * will always be left registered with the kernel since it is also the
1180  * controller node.  Any changes to disk 0 will show up on the next
1181  * reboot.
1182 */
1183 static void cciss_update_drive_info(int ctlr, int drv_index)
1184   {
1185         ctlr_info_t *h = hba[ctlr];
1186         struct gendisk *disk;
1187         ReadCapdata_struct *size_buff = NULL;
1188         InquiryData_struct *inq_buff = NULL;
1189         unsigned int block_size;
1190         unsigned int total_size;
1191         unsigned long flags = 0;
1192         int ret = 0;
1193
1194         /* if the disk already exists then deregister it before proceeding*/
1195         if (h->drv[drv_index].raid_level != -1){
1196                 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1197                 h->drv[drv_index].busy_configuring = 1;
1198                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1199                 ret = deregister_disk(h->gendisk[drv_index],
1200                         &h->drv[drv_index], 0);
1201                 h->drv[drv_index].busy_configuring = 0;
1202         }
1203
1204         /* If the disk is in use return */
1205         if (ret)
1206                 return;
1207
1208
1209         /* Get information about the disk and modify the driver sturcture */
1210         size_buff = kmalloc(sizeof( ReadCapdata_struct), GFP_KERNEL);
1211         if (size_buff == NULL)
1212                 goto mem_msg;
1213         inq_buff = kmalloc(sizeof( InquiryData_struct), GFP_KERNEL);
1214         if (inq_buff == NULL)
1215                 goto mem_msg;
1216
1217         cciss_read_capacity(ctlr, drv_index, size_buff, 1,
1218                 &total_size, &block_size);
1219         cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1220                 inq_buff, &h->drv[drv_index]);
1221
1222         ++h->num_luns;
1223         disk = h->gendisk[drv_index];
1224         set_capacity(disk, h->drv[drv_index].nr_blocks);
1225
1226
1227         /* if it's the controller it's already added */
1228         if (drv_index){
1229                 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1230
1231                 /* Set up queue information */
1232                 disk->queue->backing_dev_info.ra_pages = READ_AHEAD;
1233                 blk_queue_bounce_limit(disk->queue, hba[ctlr]->pdev->dma_mask);
1234
1235                 /* This is a hardware imposed limit. */
1236                 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1237
1238                 /* This is a limit in the driver and could be eliminated. */
1239                 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1240
1241                 blk_queue_max_sectors(disk->queue, 512);
1242
1243                 disk->queue->queuedata = hba[ctlr];
1244
1245                 blk_queue_hardsect_size(disk->queue,
1246                         hba[ctlr]->drv[drv_index].block_size);
1247
1248                 h->drv[drv_index].queue = disk->queue;
1249                 add_disk(disk);
1250         }
1251
1252 freeret:
1253         kfree(size_buff);
1254         kfree(inq_buff);
1255         return;
1256 mem_msg:
1257         printk(KERN_ERR "cciss: out of memory\n");
1258         goto freeret;
1259 }
1260
1261 /* This function will find the first index of the controllers drive array
1262  * that has a -1 for the raid_level and will return that index.  This is
1263  * where new drives will be added.  If the index to be returned is greater
1264  * than the highest_lun index for the controller then highest_lun is set
1265  * to this new index.  If there are no available indexes then -1 is returned.
1266 */
1267 static int cciss_find_free_drive_index(int ctlr)
1268 {
1269         int i;
1270
1271         for (i=0; i < CISS_MAX_LUN; i++){
1272                 if (hba[ctlr]->drv[i].raid_level == -1){
1273                         if (i > hba[ctlr]->highest_lun)
1274                                 hba[ctlr]->highest_lun = i;
1275                         return i;
1276                 }
1277         }
1278         return -1;
1279 }
1280
1281 /* This function will add and remove logical drives from the Logical
1282  * drive array of the controller and maintain persistancy of ordering
1283  * so that mount points are preserved until the next reboot.  This allows
1284  * for the removal of logical drives in the middle of the drive array
1285  * without a re-ordering of those drives.
1286  * INPUT
1287  * h            = The controller to perform the operations on
1288  * del_disk     = The disk to remove if specified.  If the value given
1289  *                is NULL then no disk is removed.
1290 */
1291 static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk)
1292 {
1293         int ctlr = h->ctlr;
1294         int num_luns;
1295         ReportLunData_struct *ld_buff = NULL;
1296         drive_info_struct *drv = NULL;
1297         int return_code;
1298         int listlength = 0;
1299         int i;
1300         int drv_found;
1301         int drv_index = 0;
1302         __u32 lunid = 0;
1303         unsigned long flags;
1304
1305         /* Set busy_configuring flag for this operation */
1306         spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1307         if (h->num_luns >= CISS_MAX_LUN){
1308                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1309                 return -EINVAL;
1310         }
1311
1312         if (h->busy_configuring){
1313                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1314                 return -EBUSY;
1315         }
1316         h->busy_configuring = 1;
1317
1318         /* if del_disk is NULL then we are being called to add a new disk
1319          * and update the logical drive table.  If it is not NULL then
1320          * we will check if the disk is in use or not.
1321          */
1322         if (del_disk != NULL){
1323                 drv = get_drv(del_disk);
1324                 drv->busy_configuring = 1;
1325                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1326                 return_code = deregister_disk(del_disk, drv, 1);
1327                 drv->busy_configuring = 0;
1328                 h->busy_configuring = 0;
1329                 return return_code;
1330         } else {
1331                 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1332                 if (!capable(CAP_SYS_RAWIO))
1333                         return -EPERM;
1334
1335                 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1336                 if (ld_buff == NULL)
1337                         goto mem_msg;
1338
1339                 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
1340                                 sizeof(ReportLunData_struct), 0, 0, 0,
1341                                 TYPE_CMD);
1342
1343                 if (return_code == IO_OK){
1344                         listlength |= (0xff & (unsigned int)(ld_buff->LUNListLength[0])) << 24;
1345                         listlength |= (0xff & (unsigned int)(ld_buff->LUNListLength[1])) << 16;
1346                         listlength |= (0xff & (unsigned int)(ld_buff->LUNListLength[2])) << 8;
1347                         listlength |= 0xff & (unsigned int)(ld_buff->LUNListLength[3]);
1348                 } else{ /* reading number of logical volumes failed */
1349                         printk(KERN_WARNING "cciss: report logical volume"
1350                                 " command failed\n");
1351                         listlength = 0;
1352                         goto freeret;
1353                 }
1354
1355                 num_luns = listlength / 8;      /* 8 bytes per entry */
1356                 if (num_luns > CISS_MAX_LUN){
1357                         num_luns = CISS_MAX_LUN;
1358                         printk(KERN_WARNING "cciss: more luns configured"
1359                                 " on controller than can be handled by"
1360                                 " this driver.\n");
1361                 }
1362
1363                 /* Compare controller drive array to drivers drive array.
1364                 * Check for updates in the drive information and any new drives
1365                 * on the controller.
1366                 */
1367                 for (i=0; i < num_luns; i++){
1368                         int j;
1369
1370                         drv_found = 0;
1371
1372                         lunid = (0xff &
1373                                 (unsigned int)(ld_buff->LUN[i][3])) << 24;
1374                         lunid |= (0xff &
1375                                 (unsigned int)(ld_buff->LUN[i][2])) << 16;
1376                         lunid |= (0xff &
1377                                 (unsigned int)(ld_buff->LUN[i][1])) << 8;
1378                         lunid |= 0xff &
1379                                 (unsigned int)(ld_buff->LUN[i][0]);
1380
1381                         /* Find if the LUN is already in the drive array
1382                          * of the controller.  If so then update its info
1383                          * if not is use.  If it does not exist then find
1384                          * the first free index and add it.
1385                         */
1386                         for (j=0; j <= h->highest_lun; j++){
1387                                 if (h->drv[j].LunID == lunid){
1388                                         drv_index = j;
1389                                         drv_found = 1;
1390                                 }
1391                         }
1392
1393                         /* check if the drive was found already in the array */
1394                         if (!drv_found){
1395                                 drv_index = cciss_find_free_drive_index(ctlr);
1396                                 if (drv_index == -1)
1397                                         goto freeret;
1398
1399                         }
1400                         h->drv[drv_index].LunID = lunid;
1401                         cciss_update_drive_info(ctlr, drv_index);
1402                 } /* end for */
1403         } /* end else */
1404
1405 freeret:
1406         kfree(ld_buff);
1407         h->busy_configuring = 0;
1408         /* We return -1 here to tell the ACU that we have registered/updated
1409          * all of the drives that we can and to keep it from calling us
1410          * additional times.
1411         */
1412         return -1;
1413 mem_msg:
1414         printk(KERN_ERR "cciss: out of memory\n");
1415         goto freeret;
1416 }
1417
1418 /* This function will deregister the disk and it's queue from the
1419  * kernel.  It must be called with the controller lock held and the
1420  * drv structures busy_configuring flag set.  It's parameters are:
1421  *
1422  * disk = This is the disk to be deregistered
1423  * drv  = This is the drive_info_struct associated with the disk to be
1424  *        deregistered.  It contains information about the disk used
1425  *        by the driver.
1426  * clear_all = This flag determines whether or not the disk information
1427  *             is going to be completely cleared out and the highest_lun
1428  *             reset.  Sometimes we want to clear out information about
1429  *             the disk in preperation for re-adding it.  In this case
1430  *             the highest_lun should be left unchanged and the LunID
1431  *             should not be cleared.
1432 */
1433 static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
1434                            int clear_all)
1435 {
1436         ctlr_info_t *h = get_host(disk);
1437
1438         if (!capable(CAP_SYS_RAWIO))
1439                 return -EPERM;
1440
1441         /* make sure logical volume is NOT is use */
1442         if(clear_all || (h->gendisk[0] == disk)) {
1443         if (drv->usage_count > 1)
1444                 return -EBUSY;
1445         }
1446         else
1447                 if( drv->usage_count > 0 )
1448                         return -EBUSY;
1449
1450         /* invalidate the devices and deregister the disk.  If it is disk
1451          * zero do not deregister it but just zero out it's values.  This
1452          * allows us to delete disk zero but keep the controller registered.
1453         */
1454         if (h->gendisk[0] != disk){
1455                 if (disk->flags & GENHD_FL_UP){
1456                         blk_cleanup_queue(disk->queue);
1457                 del_gendisk(disk);
1458                         drv->queue = NULL;
1459                 }
1460         }
1461
1462         --h->num_luns;
1463         /* zero out the disk size info */
1464         drv->nr_blocks = 0;
1465         drv->block_size = 0;
1466         drv->heads = 0;
1467         drv->sectors = 0;
1468         drv->cylinders = 0;
1469         drv->raid_level = -1;   /* This can be used as a flag variable to
1470                                  * indicate that this element of the drive
1471                                  * array is free.
1472                                 */
1473
1474         if (clear_all){
1475         /* check to see if it was the last disk */
1476         if (drv == h->drv + h->highest_lun) {
1477                 /* if so, find the new hightest lun */
1478                 int i, newhighest =-1;
1479                 for(i=0; i<h->highest_lun; i++) {
1480                         /* if the disk has size > 0, it is available */
1481                                 if (h->drv[i].heads)
1482                                 newhighest = i;
1483                 }
1484                 h->highest_lun = newhighest;
1485         }
1486
1487         drv->LunID = 0;
1488         }
1489         return(0);
1490 }
1491
1492 static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
1493         size_t size,
1494         unsigned int use_unit_num, /* 0: address the controller,
1495                                       1: address logical volume log_unit,
1496                                       2: periph device address is scsi3addr */
1497         unsigned int log_unit, __u8 page_code, unsigned char *scsi3addr,
1498         int cmd_type)
1499 {
1500         ctlr_info_t *h= hba[ctlr];
1501         u64bit buff_dma_handle;
1502         int status = IO_OK;
1503
1504         c->cmd_type = CMD_IOCTL_PEND;
1505         c->Header.ReplyQueue = 0;
1506         if( buff != NULL) {
1507                 c->Header.SGList = 1;
1508                 c->Header.SGTotal= 1;
1509         } else {
1510                 c->Header.SGList = 0;
1511                 c->Header.SGTotal= 0;
1512         }
1513         c->Header.Tag.lower = c->busaddr;
1514
1515         c->Request.Type.Type = cmd_type;
1516         if (cmd_type == TYPE_CMD) {
1517                 switch(cmd) {
1518                 case  CISS_INQUIRY:
1519                         /* If the logical unit number is 0 then, this is going
1520                         to controller so It's a physical command
1521                         mode = 0 target = 0.  So we have nothing to write.
1522                         otherwise, if use_unit_num == 1,
1523                         mode = 1(volume set addressing) target = LUNID
1524                         otherwise, if use_unit_num == 2,
1525                         mode = 0(periph dev addr) target = scsi3addr */
1526                         if (use_unit_num == 1) {
1527                                 c->Header.LUN.LogDev.VolId=
1528                                         h->drv[log_unit].LunID;
1529                                 c->Header.LUN.LogDev.Mode = 1;
1530                         } else if (use_unit_num == 2) {
1531                                 memcpy(c->Header.LUN.LunAddrBytes,scsi3addr,8);
1532                                 c->Header.LUN.LogDev.Mode = 0;
1533                         }
1534                         /* are we trying to read a vital product page */
1535                         if(page_code != 0) {
1536                                 c->Request.CDB[1] = 0x01;
1537                                 c->Request.CDB[2] = page_code;
1538                         }
1539                         c->Request.CDBLen = 6;
1540                         c->Request.Type.Attribute = ATTR_SIMPLE;
1541                         c->Request.Type.Direction = XFER_READ;
1542                         c->Request.Timeout = 0;
1543                         c->Request.CDB[0] =  CISS_INQUIRY;
1544                         c->Request.CDB[4] = size  & 0xFF;
1545                 break;
1546                 case CISS_REPORT_LOG:
1547                 case CISS_REPORT_PHYS:
1548                         /* Talking to controller so It's a physical command
1549                            mode = 00 target = 0.  Nothing to write.
1550                         */
1551                         c->Request.CDBLen = 12;
1552                         c->Request.Type.Attribute = ATTR_SIMPLE;
1553                         c->Request.Type.Direction = XFER_READ;
1554                         c->Request.Timeout = 0;
1555                         c->Request.CDB[0] = cmd;
1556                         c->Request.CDB[6] = (size >> 24) & 0xFF;  //MSB
1557                         c->Request.CDB[7] = (size >> 16) & 0xFF;
1558                         c->Request.CDB[8] = (size >> 8) & 0xFF;
1559                         c->Request.CDB[9] = size & 0xFF;
1560                         break;
1561
1562                 case CCISS_READ_CAPACITY:
1563                         c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1564                         c->Header.LUN.LogDev.Mode = 1;
1565                         c->Request.CDBLen = 10;
1566                         c->Request.Type.Attribute = ATTR_SIMPLE;
1567                         c->Request.Type.Direction = XFER_READ;
1568                         c->Request.Timeout = 0;
1569                         c->Request.CDB[0] = cmd;
1570                 break;
1571                 case CCISS_CACHE_FLUSH:
1572                         c->Request.CDBLen = 12;
1573                         c->Request.Type.Attribute = ATTR_SIMPLE;
1574                         c->Request.Type.Direction = XFER_WRITE;
1575                         c->Request.Timeout = 0;
1576                         c->Request.CDB[0] = BMIC_WRITE;
1577                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
1578                 break;
1579                 default:
1580                         printk(KERN_WARNING
1581                                 "cciss%d:  Unknown Command 0x%c\n", ctlr, cmd);
1582                         return(IO_ERROR);
1583                 }
1584         } else if (cmd_type == TYPE_MSG) {
1585                 switch (cmd) {
1586                 case 3: /* No-Op message */
1587                         c->Request.CDBLen = 1;
1588                         c->Request.Type.Attribute = ATTR_SIMPLE;
1589                         c->Request.Type.Direction = XFER_WRITE;
1590                         c->Request.Timeout = 0;
1591                         c->Request.CDB[0] = cmd;
1592                         break;
1593                 default:
1594                         printk(KERN_WARNING
1595                                 "cciss%d: unknown message type %d\n",
1596                                 ctlr, cmd);
1597                         return IO_ERROR;
1598                 }
1599         } else {
1600                 printk(KERN_WARNING
1601                         "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1602                 return IO_ERROR;
1603         }
1604         /* Fill in the scatter gather information */
1605         if (size > 0) {
1606                 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
1607                         buff, size, PCI_DMA_BIDIRECTIONAL);
1608                 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
1609                 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
1610                 c->SG[0].Len = size;
1611                 c->SG[0].Ext = 0;  /* we are not chaining */
1612         }
1613         return status;
1614 }
1615 static int sendcmd_withirq(__u8 cmd,
1616         int     ctlr,
1617         void    *buff,
1618         size_t  size,
1619         unsigned int use_unit_num,
1620         unsigned int log_unit,
1621         __u8    page_code,
1622         int cmd_type)
1623 {
1624         ctlr_info_t *h = hba[ctlr];
1625         CommandList_struct *c;
1626         u64bit  buff_dma_handle;
1627         unsigned long flags;
1628         int return_status;
1629         DECLARE_COMPLETION(wait);
1630
1631         if ((c = cmd_alloc(h , 0)) == NULL)
1632                 return -ENOMEM;
1633         return_status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
1634                 log_unit, page_code, NULL, cmd_type);
1635         if (return_status != IO_OK) {
1636                 cmd_free(h, c, 0);
1637                 return return_status;
1638         }
1639 resend_cmd2:
1640         c->waiting = &wait;
1641
1642         /* Put the request on the tail of the queue and send it */
1643         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1644         addQ(&h->reqQ, c);
1645         h->Qdepth++;
1646         start_io(h);
1647         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1648
1649         wait_for_completion(&wait);
1650
1651         if(c->err_info->CommandStatus != 0)
1652         { /* an error has occurred */
1653                 switch(c->err_info->CommandStatus)
1654                 {
1655                         case CMD_TARGET_STATUS:
1656                                 printk(KERN_WARNING "cciss: cmd %p has "
1657                                         " completed with errors\n", c);
1658                                 if( c->err_info->ScsiStatus)
1659                                 {
1660                                         printk(KERN_WARNING "cciss: cmd %p "
1661                                         "has SCSI Status = %x\n",
1662                                                 c,
1663                                                 c->err_info->ScsiStatus);
1664                                 }
1665
1666                         break;
1667                         case CMD_DATA_UNDERRUN:
1668                         case CMD_DATA_OVERRUN:
1669                         /* expected for inquire and report lun commands */
1670                         break;
1671                         case CMD_INVALID:
1672                                 printk(KERN_WARNING "cciss: Cmd %p is "
1673                                         "reported invalid\n", c);
1674                                 return_status = IO_ERROR;
1675                         break;
1676                         case CMD_PROTOCOL_ERR:
1677                                 printk(KERN_WARNING "cciss: cmd %p has "
1678                                         "protocol error \n", c);
1679                                 return_status = IO_ERROR;
1680                         break;
1681 case CMD_HARDWARE_ERR:
1682                                 printk(KERN_WARNING "cciss: cmd %p had "
1683                                         " hardware error\n", c);
1684                                 return_status = IO_ERROR;
1685                         break;
1686                         case CMD_CONNECTION_LOST:
1687                                 printk(KERN_WARNING "cciss: cmd %p had "
1688                                         "connection lost\n", c);
1689                                 return_status = IO_ERROR;
1690                         break;
1691                         case CMD_ABORTED:
1692                                 printk(KERN_WARNING "cciss: cmd %p was "
1693                                         "aborted\n", c);
1694                                 return_status = IO_ERROR;
1695                         break;
1696                         case CMD_ABORT_FAILED:
1697                                 printk(KERN_WARNING "cciss: cmd %p reports "
1698                                         "abort failed\n", c);
1699                                 return_status = IO_ERROR;
1700                         break;
1701                         case CMD_UNSOLICITED_ABORT:
1702                                 printk(KERN_WARNING
1703                                         "cciss%d: unsolicited abort %p\n",
1704                                         ctlr, c);
1705                                 if (c->retry_count < MAX_CMD_RETRIES) {
1706                                         printk(KERN_WARNING
1707                                                 "cciss%d: retrying %p\n",
1708                                                 ctlr, c);
1709                                         c->retry_count++;
1710                                         /* erase the old error information */
1711                                         memset(c->err_info, 0,
1712                                                 sizeof(ErrorInfo_struct));
1713                                         return_status = IO_OK;
1714                                         INIT_COMPLETION(wait);
1715                                         goto resend_cmd2;
1716                                 }
1717                                 return_status = IO_ERROR;
1718                         break;
1719                         default:
1720                                 printk(KERN_WARNING "cciss: cmd %p returned "
1721                                         "unknown status %x\n", c,
1722                                                 c->err_info->CommandStatus);
1723                                 return_status = IO_ERROR;
1724                 }
1725         }
1726         /* unlock the buffers from DMA */
1727         buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
1728         buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
1729         pci_unmap_single( h->pdev, (dma_addr_t) buff_dma_handle.val,
1730                         c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
1731         cmd_free(h, c, 0);
1732         return(return_status);
1733
1734 }
1735 static void cciss_geometry_inquiry(int ctlr, int logvol,
1736                         int withirq, unsigned int total_size,
1737                         unsigned int block_size, InquiryData_struct *inq_buff,
1738                         drive_info_struct *drv)
1739 {
1740         int return_code;
1741         memset(inq_buff, 0, sizeof(InquiryData_struct));
1742         if (withirq)
1743                 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
1744                         inq_buff, sizeof(*inq_buff), 1, logvol ,0xC1, TYPE_CMD);
1745         else
1746                 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
1747                         sizeof(*inq_buff), 1, logvol ,0xC1, NULL, TYPE_CMD);
1748         if (return_code == IO_OK) {
1749                 if(inq_buff->data_byte[8] == 0xFF) {
1750                         printk(KERN_WARNING
1751                                 "cciss: reading geometry failed, volume "
1752                                 "does not support reading geometry\n");
1753                         drv->block_size = block_size;
1754                         drv->nr_blocks = total_size;
1755                         drv->heads = 255;
1756                         drv->sectors = 32; // Sectors per track
1757                         drv->cylinders = total_size / 255 / 32;
1758                 } else {
1759                         unsigned int t;
1760
1761                         drv->block_size = block_size;
1762                         drv->nr_blocks = total_size;
1763                         drv->heads = inq_buff->data_byte[6];
1764                         drv->sectors = inq_buff->data_byte[7];
1765                         drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
1766                         drv->cylinders += inq_buff->data_byte[5];
1767                         drv->raid_level = inq_buff->data_byte[8];
1768                         t = drv->heads * drv->sectors;
1769                         if (t > 1) {
1770                                 drv->cylinders = total_size/t;
1771                         }
1772                 }
1773         } else { /* Get geometry failed */
1774                 printk(KERN_WARNING "cciss: reading geometry failed\n");
1775         }
1776         printk(KERN_INFO "      heads= %d, sectors= %d, cylinders= %d\n\n",
1777                 drv->heads, drv->sectors, drv->cylinders);
1778 }
1779 static void
1780 cciss_read_capacity(int ctlr, int logvol, ReadCapdata_struct *buf,
1781                 int withirq, unsigned int *total_size, unsigned int *block_size)
1782 {
1783         int return_code;
1784         memset(buf, 0, sizeof(*buf));
1785         if (withirq)
1786                 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
1787                         ctlr, buf, sizeof(*buf), 1, logvol, 0, TYPE_CMD);
1788         else
1789                 return_code = sendcmd(CCISS_READ_CAPACITY,
1790                         ctlr, buf, sizeof(*buf), 1, logvol, 0, NULL, TYPE_CMD);
1791         if (return_code == IO_OK) {
1792                 *total_size = be32_to_cpu(*((__be32 *) &buf->total_size[0]))+1;
1793                 *block_size = be32_to_cpu(*((__be32 *) &buf->block_size[0]));
1794         } else { /* read capacity command failed */
1795                 printk(KERN_WARNING "cciss: read capacity failed\n");
1796                 *total_size = 0;
1797                 *block_size = BLOCK_SIZE;
1798         }
1799         printk(KERN_INFO "      blocks= %u block_size= %d\n",
1800                 *total_size, *block_size);
1801         return;
1802 }
1803
1804 static int cciss_revalidate(struct gendisk *disk)
1805 {
1806         ctlr_info_t *h = get_host(disk);
1807         drive_info_struct *drv = get_drv(disk);
1808         int logvol;
1809         int FOUND=0;
1810         unsigned int block_size;
1811         unsigned int total_size;
1812         ReadCapdata_struct *size_buff = NULL;
1813         InquiryData_struct *inq_buff = NULL;
1814
1815         for(logvol=0; logvol < CISS_MAX_LUN; logvol++)
1816         {
1817                 if(h->drv[logvol].LunID == drv->LunID) {
1818                         FOUND=1;
1819                         break;
1820                 }
1821         }
1822
1823         if (!FOUND) return 1;
1824
1825         size_buff = kmalloc(sizeof( ReadCapdata_struct), GFP_KERNEL);
1826         if (size_buff == NULL)
1827         {
1828                 printk(KERN_WARNING "cciss: out of memory\n");
1829                 return 1;
1830         }
1831         inq_buff = kmalloc(sizeof( InquiryData_struct), GFP_KERNEL);
1832         if (inq_buff == NULL)
1833         {
1834                 printk(KERN_WARNING "cciss: out of memory\n");
1835                 kfree(size_buff);
1836                 return 1;
1837         }
1838
1839         cciss_read_capacity(h->ctlr, logvol, size_buff, 1, &total_size, &block_size);
1840         cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size, inq_buff, drv);
1841
1842         blk_queue_hardsect_size(drv->queue, drv->block_size);
1843         set_capacity(disk, drv->nr_blocks);
1844
1845         kfree(size_buff);
1846         kfree(inq_buff);
1847         return 0;
1848 }
1849
1850 /*
1851  *   Wait polling for a command to complete.
1852  *   The memory mapped FIFO is polled for the completion.
1853  *   Used only at init time, interrupts from the HBA are disabled.
1854  */
1855 static unsigned long pollcomplete(int ctlr)
1856 {
1857         unsigned long done;
1858         int i;
1859
1860         /* Wait (up to 20 seconds) for a command to complete */
1861
1862         for (i = 20 * HZ; i > 0; i--) {
1863                 done = hba[ctlr]->access.command_completed(hba[ctlr]);
1864                 if (done == FIFO_EMPTY)
1865                         schedule_timeout_uninterruptible(1);
1866                 else
1867                         return (done);
1868         }
1869         /* Invalid address to tell caller we ran out of time */
1870         return 1;
1871 }
1872 /*
1873  * Send a command to the controller, and wait for it to complete.
1874  * Only used at init time.
1875  */
1876 static int sendcmd(
1877         __u8    cmd,
1878         int     ctlr,
1879         void    *buff,
1880         size_t  size,
1881         unsigned int use_unit_num, /* 0: address the controller,
1882                                       1: address logical volume log_unit,
1883                                       2: periph device address is scsi3addr */
1884         unsigned int log_unit,
1885         __u8    page_code,
1886         unsigned char *scsi3addr,
1887         int cmd_type)
1888 {
1889         CommandList_struct *c;
1890         int i;
1891         unsigned long complete;
1892         ctlr_info_t *info_p= hba[ctlr];
1893         u64bit buff_dma_handle;
1894         int status;
1895
1896         if ((c = cmd_alloc(info_p, 1)) == NULL) {
1897                 printk(KERN_WARNING "cciss: unable to get memory");
1898                 return(IO_ERROR);
1899         }
1900         status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
1901                 log_unit, page_code, scsi3addr, cmd_type);
1902         if (status != IO_OK) {
1903                 cmd_free(info_p, c, 1);
1904                 return status;
1905         }
1906 resend_cmd1:
1907         /*
1908          * Disable interrupt
1909          */
1910 #ifdef CCISS_DEBUG
1911         printk(KERN_DEBUG "cciss: turning intr off\n");
1912 #endif /* CCISS_DEBUG */
1913         info_p->access.set_intr_mask(info_p, CCISS_INTR_OFF);
1914
1915         /* Make sure there is room in the command FIFO */
1916         /* Actually it should be completely empty at this time. */
1917         for (i = 200000; i > 0; i--)
1918         {
1919                 /* if fifo isn't full go */
1920                 if (!(info_p->access.fifo_full(info_p)))
1921                 {
1922
1923                         break;
1924                 }
1925                 udelay(10);
1926                 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
1927                         " waiting!\n", ctlr);
1928         }
1929         /*
1930          * Send the cmd
1931          */
1932         info_p->access.submit_command(info_p, c);
1933         complete = pollcomplete(ctlr);
1934
1935 #ifdef CCISS_DEBUG
1936         printk(KERN_DEBUG "cciss: command completed\n");
1937 #endif /* CCISS_DEBUG */
1938
1939         if (complete != 1) {
1940                 if ( (complete & CISS_ERROR_BIT)
1941                      && (complete & ~CISS_ERROR_BIT) == c->busaddr)
1942                      {
1943                         /* if data overrun or underun on Report command
1944                                 ignore it
1945                         */
1946                         if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
1947                              (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
1948                              (c->Request.CDB[0] == CISS_INQUIRY)) &&
1949                                 ((c->err_info->CommandStatus ==
1950                                         CMD_DATA_OVERRUN) ||
1951                                  (c->err_info->CommandStatus ==
1952                                         CMD_DATA_UNDERRUN)
1953                                 ))
1954                         {
1955                                 complete = c->busaddr;
1956                         } else {
1957                                 if (c->err_info->CommandStatus ==
1958                                                 CMD_UNSOLICITED_ABORT) {
1959                                         printk(KERN_WARNING "cciss%d: "
1960                                                 "unsolicited abort %p\n",
1961                                                 ctlr, c);
1962                                         if (c->retry_count < MAX_CMD_RETRIES) {
1963                                                 printk(KERN_WARNING
1964                                                    "cciss%d: retrying %p\n",
1965                                                    ctlr, c);
1966                                                 c->retry_count++;
1967                                                 /* erase the old error */
1968                                                 /* information */
1969                                                 memset(c->err_info, 0,
1970                                                    sizeof(ErrorInfo_struct));
1971                                                 goto resend_cmd1;
1972                                         } else {
1973                                                 printk(KERN_WARNING
1974                                                    "cciss%d: retried %p too "
1975                                                    "many times\n", ctlr, c);
1976                                                 status = IO_ERROR;
1977                                                 goto cleanup1;
1978                                         }
1979                                 }
1980                                 printk(KERN_WARNING "ciss ciss%d: sendcmd"
1981                                 " Error %x \n", ctlr,
1982                                         c->err_info->CommandStatus);
1983                                 printk(KERN_WARNING "ciss ciss%d: sendcmd"
1984                                 " offensive info\n"
1985                                 "  size %x\n   num %x   value %x\n", ctlr,
1986                                   c->err_info->MoreErrInfo.Invalid_Cmd.offense_size,
1987                                   c->err_info->MoreErrInfo.Invalid_Cmd.offense_num,
1988                                   c->err_info->MoreErrInfo.Invalid_Cmd.offense_value);
1989                                 status = IO_ERROR;
1990                                 goto cleanup1;
1991                         }
1992                 }
1993                 if (complete != c->busaddr) {
1994                         printk( KERN_WARNING "cciss cciss%d: SendCmd "
1995                       "Invalid command list address returned! (%lx)\n",
1996                                 ctlr, complete);
1997                         status = IO_ERROR;
1998                         goto cleanup1;
1999                 }
2000         } else {
2001                 printk( KERN_WARNING
2002                         "cciss cciss%d: SendCmd Timeout out, "
2003                         "No command list address returned!\n",
2004                         ctlr);
2005                 status = IO_ERROR;
2006         }
2007
2008 cleanup1:
2009         /* unlock the data buffer from DMA */
2010         buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2011         buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2012         pci_unmap_single(info_p->pdev, (dma_addr_t) buff_dma_handle.val,
2013                                 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2014         cmd_free(info_p, c, 1);
2015         return (status);
2016 }
2017 /*
2018  * Map (physical) PCI mem into (virtual) kernel space
2019  */
2020 static void __iomem *remap_pci_mem(ulong base, ulong size)
2021 {
2022         ulong page_base        = ((ulong) base) & PAGE_MASK;
2023         ulong page_offs        = ((ulong) base) - page_base;
2024         void __iomem *page_remapped = ioremap(page_base, page_offs+size);
2025
2026         return page_remapped ? (page_remapped + page_offs) : NULL;
2027 }
2028
2029 /*
2030  * Takes jobs of the Q and sends them to the hardware, then puts it on
2031  * the Q to wait for completion.
2032  */
2033 static void start_io( ctlr_info_t *h)
2034 {
2035         CommandList_struct *c;
2036
2037         while(( c = h->reqQ) != NULL )
2038         {
2039                 /* can't do anything if fifo is full */
2040                 if ((h->access.fifo_full(h))) {
2041                         printk(KERN_WARNING "cciss: fifo full\n");
2042                         break;
2043                 }
2044
2045                 /* Get the frist entry from the Request Q */
2046                 removeQ(&(h->reqQ), c);
2047                 h->Qdepth--;
2048
2049                 /* Tell the controller execute command */
2050                 h->access.submit_command(h, c);
2051
2052                 /* Put job onto the completed Q */
2053                 addQ (&(h->cmpQ), c);
2054         }
2055 }
2056
2057 static inline void complete_buffers(struct bio *bio, int status)
2058 {
2059         while (bio) {
2060                 struct bio *xbh = bio->bi_next;
2061                 int nr_sectors = bio_sectors(bio);
2062
2063                 bio->bi_next = NULL;
2064                 blk_finished_io(len);
2065                 bio_endio(bio, nr_sectors << 9, status ? 0 : -EIO);
2066                 bio = xbh;
2067         }
2068
2069 }
2070 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2071 /* Zeros out the error record and then resends the command back */
2072 /* to the controller */
2073 static inline void resend_cciss_cmd( ctlr_info_t *h, CommandList_struct *c)
2074 {
2075         /* erase the old error information */
2076         memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2077
2078         /* add it to software queue and then send it to the controller */
2079         addQ(&(h->reqQ),c);
2080         h->Qdepth++;
2081         if(h->Qdepth > h->maxQsinceinit)
2082                 h->maxQsinceinit = h->Qdepth;
2083
2084         start_io(h);
2085 }
2086 /* checks the status of the job and calls complete buffers to mark all
2087  * buffers for the completed job.
2088  */
2089 static inline void complete_command( ctlr_info_t *h, CommandList_struct *cmd,
2090                 int timeout)
2091 {
2092         int status = 1;
2093         int i;
2094         int retry_cmd = 0;
2095         u64bit temp64;
2096
2097         if (timeout)
2098                 status = 0;
2099
2100         if(cmd->err_info->CommandStatus != 0)
2101         { /* an error has occurred */
2102                 switch(cmd->err_info->CommandStatus)
2103                 {
2104                         unsigned char sense_key;
2105                         case CMD_TARGET_STATUS:
2106                                 status = 0;
2107
2108                                 if( cmd->err_info->ScsiStatus == 0x02)
2109                                 {
2110                                         printk(KERN_WARNING "cciss: cmd %p "
2111                                                 "has CHECK CONDITION "
2112                                                 " byte 2 = 0x%x\n", cmd,
2113                                                 cmd->err_info->SenseInfo[2]
2114                                         );
2115                                         /* check the sense key */
2116                                         sense_key = 0xf &
2117                                                 cmd->err_info->SenseInfo[2];
2118                                         /* no status or recovered error */
2119                                         if((sense_key == 0x0) ||
2120                                             (sense_key == 0x1))
2121                                         {
2122                                                         status = 1;
2123                                         }
2124                                 } else
2125                                 {
2126                                         printk(KERN_WARNING "cciss: cmd %p "
2127                                                 "has SCSI Status 0x%x\n",
2128                                                 cmd, cmd->err_info->ScsiStatus);
2129                                 }
2130                         break;
2131                         case CMD_DATA_UNDERRUN:
2132                                 printk(KERN_WARNING "cciss: cmd %p has"
2133                                         " completed with data underrun "
2134                                         "reported\n", cmd);
2135                         break;
2136                         case CMD_DATA_OVERRUN:
2137                                 printk(KERN_WARNING "cciss: cmd %p has"
2138                                         " completed with data overrun "
2139                                         "reported\n", cmd);
2140                         break;
2141                         case CMD_INVALID:
2142                                 printk(KERN_WARNING "cciss: cmd %p is "
2143                                         "reported invalid\n", cmd);
2144                                 status = 0;
2145                         break;
2146                         case CMD_PROTOCOL_ERR:
2147                                 printk(KERN_WARNING "cciss: cmd %p has "
2148                                         "protocol error \n", cmd);
2149                                 status = 0;
2150                         break;
2151                         case CMD_HARDWARE_ERR:
2152                                 printk(KERN_WARNING "cciss: cmd %p had "
2153                                         " hardware error\n", cmd);
2154                                 status = 0;
2155                         break;
2156                         case CMD_CONNECTION_LOST:
2157                                 printk(KERN_WARNING "cciss: cmd %p had "
2158                                         "connection lost\n", cmd);
2159                                 status=0;
2160                         break;
2161                         case CMD_ABORTED:
2162                                 printk(KERN_WARNING "cciss: cmd %p was "
2163                                         "aborted\n", cmd);
2164                                 status=0;
2165                         break;
2166                         case CMD_ABORT_FAILED:
2167                                 printk(KERN_WARNING "cciss: cmd %p reports "
2168                                         "abort failed\n", cmd);
2169                                 status=0;
2170                         break;
2171                         case CMD_UNSOLICITED_ABORT:
2172                                 printk(KERN_WARNING "cciss%d: unsolicited "
2173                                         "abort %p\n", h->ctlr, cmd);
2174                                 if (cmd->retry_count < MAX_CMD_RETRIES) {
2175                                         retry_cmd=1;
2176                                         printk(KERN_WARNING
2177                                                 "cciss%d: retrying %p\n",
2178                                                 h->ctlr, cmd);
2179                                         cmd->retry_count++;
2180                                 } else
2181                                         printk(KERN_WARNING
2182                                                 "cciss%d: %p retried too "
2183                                                 "many times\n", h->ctlr, cmd);
2184                                 status=0;
2185                         break;
2186                         case CMD_TIMEOUT:
2187                                 printk(KERN_WARNING "cciss: cmd %p timedout\n",
2188                                         cmd);
2189                                 status=0;
2190                         break;
2191                         default:
2192                                 printk(KERN_WARNING "cciss: cmd %p returned "
2193                                         "unknown status %x\n", cmd,
2194                                                 cmd->err_info->CommandStatus);
2195                                 status=0;
2196                 }
2197         }
2198         /* We need to return this command */
2199         if(retry_cmd) {
2200                 resend_cciss_cmd(h,cmd);
2201                 return;
2202         }
2203         /* command did not need to be retried */
2204         /* unmap the DMA mapping for all the scatter gather elements */
2205         for(i=0; i<cmd->Header.SGList; i++) {
2206                 temp64.val32.lower = cmd->SG[i].Addr.lower;
2207                 temp64.val32.upper = cmd->SG[i].Addr.upper;
2208                 pci_unmap_page(hba[cmd->ctlr]->pdev,
2209                         temp64.val, cmd->SG[i].Len,
2210                         (cmd->Request.Type.Direction == XFER_READ) ?
2211                                 PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
2212         }
2213         complete_buffers(cmd->rq->bio, status);
2214
2215 #ifdef CCISS_DEBUG
2216         printk("Done with %p\n", cmd->rq);
2217 #endif /* CCISS_DEBUG */
2218
2219         end_that_request_last(cmd->rq);
2220         cmd_free(h,cmd,1);
2221 }
2222
2223 /*
2224  * Get a request and submit it to the controller.
2225  */
2226 static void do_cciss_request(request_queue_t *q)
2227 {
2228         ctlr_info_t *h= q->queuedata;
2229         CommandList_struct *c;
2230         int start_blk, seg;
2231         struct request *creq;
2232         u64bit temp64;
2233         struct scatterlist tmp_sg[MAXSGENTRIES];
2234         drive_info_struct *drv;
2235         int i, dir;
2236
2237         /* We call start_io here in case there is a command waiting on the
2238          * queue that has not been sent.
2239         */
2240         if (blk_queue_plugged(q))
2241                 goto startio;
2242
2243 queue:
2244         creq = elv_next_request(q);
2245         if (!creq)
2246                 goto startio;
2247
2248         if (creq->nr_phys_segments > MAXSGENTRIES)
2249                 BUG();
2250
2251         if (( c = cmd_alloc(h, 1)) == NULL)
2252                 goto full;
2253
2254         blkdev_dequeue_request(creq);
2255
2256         spin_unlock_irq(q->queue_lock);
2257
2258         c->cmd_type = CMD_RWREQ;
2259         c->rq = creq;
2260
2261         /* fill in the request */
2262         drv = creq->rq_disk->private_data;
2263         c->Header.ReplyQueue = 0;  // unused in simple mode
2264         /* got command from pool, so use the command block index instead */
2265         /* for direct lookups. */
2266         /* The first 2 bits are reserved for controller error reporting. */
2267         c->Header.Tag.lower = (c->cmdindex << 3);
2268         c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
2269         c->Header.LUN.LogDev.VolId= drv->LunID;
2270         c->Header.LUN.LogDev.Mode = 1;
2271         c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
2272         c->Request.Type.Type =  TYPE_CMD; // It is a command.
2273         c->Request.Type.Attribute = ATTR_SIMPLE;
2274         c->Request.Type.Direction =
2275                 (rq_data_dir(creq) == READ) ? XFER_READ: XFER_WRITE;
2276         c->Request.Timeout = 0; // Don't time out
2277         c->Request.CDB[0] = (rq_data_dir(creq) == READ) ? CCISS_READ : CCISS_WRITE;
2278         start_blk = creq->sector;
2279 #ifdef CCISS_DEBUG
2280         printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",(int) creq->sector,
2281                 (int) creq->nr_sectors);
2282 #endif /* CCISS_DEBUG */
2283
2284         seg = blk_rq_map_sg(q, creq, tmp_sg);
2285
2286         /* get the DMA records for the setup */
2287         if (c->Request.Type.Direction == XFER_READ)
2288                 dir = PCI_DMA_FROMDEVICE;
2289         else
2290                 dir = PCI_DMA_TODEVICE;
2291
2292         for (i=0; i<seg; i++)
2293         {
2294                 c->SG[i].Len = tmp_sg[i].length;
2295                 temp64.val = (__u64) pci_map_page(h->pdev, tmp_sg[i].page,
2296                                           tmp_sg[i].offset, tmp_sg[i].length,
2297                                           dir);
2298                 c->SG[i].Addr.lower = temp64.val32.lower;
2299                 c->SG[i].Addr.upper = temp64.val32.upper;
2300                 c->SG[i].Ext = 0;  // we are not chaining
2301         }
2302         /* track how many SG entries we are using */
2303         if( seg > h->maxSG)
2304                 h->maxSG = seg;
2305
2306 #ifdef CCISS_DEBUG
2307         printk(KERN_DEBUG "cciss: Submitting %d sectors in %d segments\n", creq->nr_sectors, seg);
2308 #endif /* CCISS_DEBUG */
2309
2310         c->Header.SGList = c->Header.SGTotal = seg;
2311         c->Request.CDB[1]= 0;
2312         c->Request.CDB[2]= (start_blk >> 24) & 0xff;    //MSB
2313         c->Request.CDB[3]= (start_blk >> 16) & 0xff;
2314         c->Request.CDB[4]= (start_blk >>  8) & 0xff;
2315         c->Request.CDB[5]= start_blk & 0xff;
2316         c->Request.CDB[6]= 0; // (sect >> 24) & 0xff; MSB
2317         c->Request.CDB[7]= (creq->nr_sectors >>  8) & 0xff;
2318         c->Request.CDB[8]= creq->nr_sectors & 0xff;
2319         c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
2320
2321         spin_lock_irq(q->queue_lock);
2322
2323         addQ(&(h->reqQ),c);
2324         h->Qdepth++;
2325         if(h->Qdepth > h->maxQsinceinit)
2326                 h->maxQsinceinit = h->Qdepth;
2327
2328         goto queue;
2329 full:
2330         blk_stop_queue(q);
2331 startio:
2332         /* We will already have the driver lock here so not need
2333          * to lock it.
2334         */
2335         start_io(h);
2336 }
2337
2338 static irqreturn_t do_cciss_intr(int irq, void *dev_id, struct pt_regs *regs)
2339 {
2340         ctlr_info_t *h = dev_id;
2341         CommandList_struct *c;
2342         unsigned long flags;
2343         __u32 a, a1, a2;
2344         int j;
2345         int start_queue = h->next_to_run;
2346
2347         /* Is this interrupt for us? */
2348         if (( h->access.intr_pending(h) == 0) || (h->interrupts_enabled == 0))
2349                 return IRQ_NONE;
2350
2351         /*
2352          * If there are completed commands in the completion queue,
2353          * we had better do something about it.
2354          */
2355         spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2356         while( h->access.intr_pending(h))
2357         {
2358                 while((a = h->access.command_completed(h)) != FIFO_EMPTY)
2359                 {
2360                         a1 = a;
2361                         if ((a & 0x04)) {
2362                                 a2 = (a >> 3);
2363                                 if (a2 >= NR_CMDS) {
2364                                         printk(KERN_WARNING "cciss: controller cciss%d failed, stopping.\n", h->ctlr);
2365                                         fail_all_cmds(h->ctlr);
2366                                         return IRQ_HANDLED;
2367                                 }
2368
2369                                 c = h->cmd_pool + a2;
2370                                 a = c->busaddr;
2371
2372                         } else {
2373                         a &= ~3;
2374                                 if ((c = h->cmpQ) == NULL) {
2375                                         printk(KERN_WARNING "cciss: Completion of %08x ignored\n", a1);
2376                                 continue;
2377                         }
2378                         while(c->busaddr != a) {
2379                                 c = c->next;
2380                                 if (c == h->cmpQ)
2381                                         break;
2382                         }
2383                         }
2384                         /*
2385                          * If we've found the command, take it off the
2386                          * completion Q and free it
2387                          */
2388                          if (c->busaddr == a) {
2389                                 removeQ(&h->cmpQ, c);
2390                                 if (c->cmd_type == CMD_RWREQ) {
2391                                         complete_command(h, c, 0);
2392                                 } else if (c->cmd_type == CMD_IOCTL_PEND) {
2393                                         complete(c->waiting);
2394                                 }
2395 #                               ifdef CONFIG_CISS_SCSI_TAPE
2396                                 else if (c->cmd_type == CMD_SCSI)
2397                                         complete_scsi_command(c, 0, a1);
2398 #                               endif
2399                                 continue;
2400                         }
2401                 }
2402         }
2403
2404         /* check to see if we have maxed out the number of commands that can
2405          * be placed on the queue.  If so then exit.  We do this check here
2406          * in case the interrupt we serviced was from an ioctl and did not
2407          * free any new commands.
2408          */
2409         if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS)
2410                 goto cleanup;
2411
2412         /* We have room on the queue for more commands.  Now we need to queue
2413          * them up.  We will also keep track of the next queue to run so
2414          * that every queue gets a chance to be started first.
2415         */
2416         for (j=0; j < h->highest_lun + 1; j++){
2417                 int curr_queue = (start_queue + j) % (h->highest_lun + 1);
2418                 /* make sure the disk has been added and the drive is real
2419                  * because this can be called from the middle of init_one.
2420                 */
2421                 if(!(h->drv[curr_queue].queue) ||
2422                                    !(h->drv[curr_queue].heads))
2423                         continue;
2424                 blk_start_queue(h->gendisk[curr_queue]->queue);
2425
2426                 /* check to see if we have maxed out the number of commands
2427                  * that can be placed on the queue.
2428                 */
2429                 if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS)
2430                 {
2431                         if (curr_queue == start_queue){
2432                                 h->next_to_run = (start_queue + 1) % (h->highest_lun + 1);
2433                                 goto cleanup;
2434                         } else {
2435                                 h->next_to_run = curr_queue;
2436                                 goto cleanup;
2437         }
2438                 } else {
2439                         curr_queue = (curr_queue + 1) % (h->highest_lun + 1);
2440                 }
2441         }
2442
2443 cleanup:
2444         spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2445         return IRQ_HANDLED;
2446 }
2447 /*
2448  *  We cannot read the structure directly, for portablity we must use
2449  *   the io functions.
2450  *   This is for debug only.
2451  */
2452 #ifdef CCISS_DEBUG
2453 static void print_cfg_table( CfgTable_struct *tb)
2454 {
2455         int i;
2456         char temp_name[17];
2457
2458         printk("Controller Configuration information\n");
2459         printk("------------------------------------\n");
2460         for(i=0;i<4;i++)
2461                 temp_name[i] = readb(&(tb->Signature[i]));
2462         temp_name[4]='\0';
2463         printk("   Signature = %s\n", temp_name);
2464         printk("   Spec Number = %d\n", readl(&(tb->SpecValence)));
2465         printk("   Transport methods supported = 0x%x\n",
2466                                 readl(&(tb-> TransportSupport)));
2467         printk("   Transport methods active = 0x%x\n",
2468                                 readl(&(tb->TransportActive)));
2469         printk("   Requested transport Method = 0x%x\n",
2470                         readl(&(tb->HostWrite.TransportRequest)));
2471         printk("   Coalese Interrupt Delay = 0x%x\n",
2472                         readl(&(tb->HostWrite.CoalIntDelay)));
2473         printk("   Coalese Interrupt Count = 0x%x\n",
2474                         readl(&(tb->HostWrite.CoalIntCount)));
2475         printk("   Max outstanding commands = 0x%d\n",
2476                         readl(&(tb->CmdsOutMax)));
2477         printk("   Bus Types = 0x%x\n", readl(&(tb-> BusTypes)));
2478         for(i=0;i<16;i++)
2479                 temp_name[i] = readb(&(tb->ServerName[i]));
2480         temp_name[16] = '\0';
2481         printk("   Server Name = %s\n", temp_name);
2482         printk("   Heartbeat Counter = 0x%x\n\n\n",
2483                         readl(&(tb->HeartBeat)));
2484 }
2485 #endif /* CCISS_DEBUG */
2486
2487 static void release_io_mem(ctlr_info_t *c)
2488 {
2489         /* if IO mem was not protected do nothing */
2490         if( c->io_mem_addr == 0)
2491                 return;
2492         release_region(c->io_mem_addr, c->io_mem_length);
2493         c->io_mem_addr = 0;
2494         c->io_mem_length = 0;
2495 }
2496
2497 static int find_PCI_BAR_index(struct pci_dev *pdev,
2498                                 unsigned long pci_bar_addr)
2499 {
2500         int i, offset, mem_type, bar_type;
2501         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
2502                 return 0;
2503         offset = 0;
2504         for (i=0; i<DEVICE_COUNT_RESOURCE; i++) {
2505                 bar_type = pci_resource_flags(pdev, i) &
2506                         PCI_BASE_ADDRESS_SPACE;
2507                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
2508                         offset += 4;
2509                 else {
2510                         mem_type = pci_resource_flags(pdev, i) &
2511                                 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
2512                         switch (mem_type) {
2513                                 case PCI_BASE_ADDRESS_MEM_TYPE_32:
2514                                 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
2515                                         offset += 4; /* 32 bit */
2516                                         break;
2517                                 case PCI_BASE_ADDRESS_MEM_TYPE_64:
2518                                         offset += 8;
2519                                         break;
2520                                 default: /* reserved in PCI 2.2 */
2521                                         printk(KERN_WARNING "Base address is invalid\n");
2522                                         return -1;
2523                                 break;
2524                         }
2525                 }
2526                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
2527                         return i+1;
2528         }
2529         return -1;
2530 }
2531
2532 static int cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
2533 {
2534         ushort subsystem_vendor_id, subsystem_device_id, command;
2535         __u32 board_id, scratchpad = 0;
2536         __u64 cfg_offset;
2537         __u32 cfg_base_addr;
2538         __u64 cfg_base_addr_index;
2539         int i;
2540
2541         /* check to see if controller has been disabled */
2542         /* BEFORE trying to enable it */
2543         (void) pci_read_config_word(pdev, PCI_COMMAND,&command);
2544         if(!(command & 0x02))
2545         {
2546                 printk(KERN_WARNING "cciss: controller appears to be disabled\n");
2547                 return(-1);
2548         }
2549
2550         if (pci_enable_device(pdev))
2551         {
2552                 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
2553                 return( -1);
2554         }
2555
2556         subsystem_vendor_id = pdev->subsystem_vendor;
2557         subsystem_device_id = pdev->subsystem_device;
2558         board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
2559                                         subsystem_vendor_id);
2560
2561         /* search for our IO range so we can protect it */
2562         for(i=0; i<DEVICE_COUNT_RESOURCE; i++)
2563         {
2564                 /* is this an IO range */
2565                 if( pci_resource_flags(pdev, i) & 0x01 ) {
2566                         c->io_mem_addr = pci_resource_start(pdev, i);
2567                         c->io_mem_length = pci_resource_end(pdev, i) -
2568                                 pci_resource_start(pdev, i) +1;
2569 #ifdef CCISS_DEBUG
2570                         printk("IO value found base_addr[%d] %lx %lx\n", i,
2571                                 c->io_mem_addr, c->io_mem_length);
2572 #endif /* CCISS_DEBUG */
2573                         /* register the IO range */
2574                         if(!request_region( c->io_mem_addr,
2575                                         c->io_mem_length, "cciss"))
2576                         {
2577                                 printk(KERN_WARNING "cciss I/O memory range already in use addr=%lx length=%ld\n",
2578                                 c->io_mem_addr, c->io_mem_length);
2579                                 c->io_mem_addr= 0;
2580                                 c->io_mem_length = 0;
2581                         }
2582                         break;
2583                 }
2584         }
2585
2586 #ifdef CCISS_DEBUG
2587         printk("command = %x\n", command);
2588         printk("irq = %x\n", pdev->irq);
2589         printk("board_id = %x\n", board_id);
2590 #endif /* CCISS_DEBUG */
2591
2592         c->intr = pdev->irq;
2593
2594         /*
2595          * Memory base addr is first addr , the second points to the config
2596          *   table
2597          */
2598
2599         c->paddr = pci_resource_start(pdev, 0); /* addressing mode bits already removed */
2600 #ifdef CCISS_DEBUG
2601         printk("address 0 = %x\n", c->paddr);
2602 #endif /* CCISS_DEBUG */
2603         c->vaddr = remap_pci_mem(c->paddr, 200);
2604
2605         /* Wait for the board to become ready.  (PCI hotplug needs this.)
2606          * We poll for up to 120 secs, once per 100ms. */
2607         for (i=0; i < 1200; i++) {
2608                 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
2609                 if (scratchpad == CCISS_FIRMWARE_READY)
2610                         break;
2611                 set_current_state(TASK_INTERRUPTIBLE);
2612                 schedule_timeout(HZ / 10); /* wait 100ms */
2613         }
2614         if (scratchpad != CCISS_FIRMWARE_READY) {
2615                 printk(KERN_WARNING "cciss: Board not ready.  Timed out.\n");
2616                 return -1;
2617         }
2618
2619         /* get the address index number */
2620         cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
2621         cfg_base_addr &= (__u32) 0x0000ffff;
2622 #ifdef CCISS_DEBUG
2623         printk("cfg base address = %x\n", cfg_base_addr);
2624 #endif /* CCISS_DEBUG */
2625         cfg_base_addr_index =
2626                 find_PCI_BAR_index(pdev, cfg_base_addr);
2627 #ifdef CCISS_DEBUG
2628         printk("cfg base address index = %x\n", cfg_base_addr_index);
2629 #endif /* CCISS_DEBUG */
2630         if (cfg_base_addr_index == -1) {
2631                 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
2632                 release_io_mem(c);
2633                 return -1;
2634         }
2635
2636         cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
2637 #ifdef CCISS_DEBUG
2638         printk("cfg offset = %x\n", cfg_offset);
2639 #endif /* CCISS_DEBUG */
2640         c->cfgtable =  remap_pci_mem(pci_resource_start(pdev,
2641                                 cfg_base_addr_index) + cfg_offset,
2642                                 sizeof(CfgTable_struct));
2643         c->board_id = board_id;
2644
2645 #ifdef CCISS_DEBUG
2646         print_cfg_table(c->cfgtable);
2647 #endif /* CCISS_DEBUG */
2648
2649         for(i=0; i<NR_PRODUCTS; i++) {
2650                 if (board_id == products[i].board_id) {
2651                         c->product_name = products[i].product_name;
2652                         c->access = *(products[i].access);
2653                         break;
2654                 }
2655         }
2656         if (i == NR_PRODUCTS) {
2657                 printk(KERN_WARNING "cciss: Sorry, I don't know how"
2658                         " to access the Smart Array controller %08lx\n",
2659                                 (unsigned long)board_id);
2660                 return -1;
2661         }
2662         if (  (readb(&c->cfgtable->Signature[0]) != 'C') ||
2663               (readb(&c->cfgtable->Signature[1]) != 'I') ||
2664               (readb(&c->cfgtable->Signature[2]) != 'S') ||
2665               (readb(&c->cfgtable->Signature[3]) != 'S') )
2666         {
2667                 printk("Does not appear to be a valid CISS config table\n");
2668                 return -1;
2669         }
2670
2671 #ifdef CONFIG_X86
2672 {
2673         /* Need to enable prefetch in the SCSI core for 6400 in x86 */
2674         __u32 prefetch;
2675         prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
2676         prefetch |= 0x100;
2677         writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
2678 }
2679 #endif
2680
2681 #ifdef CCISS_DEBUG
2682         printk("Trying to put board into Simple mode\n");
2683 #endif /* CCISS_DEBUG */
2684         c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
2685         /* Update the field, and then ring the doorbell */
2686         writel( CFGTBL_Trans_Simple,
2687                 &(c->cfgtable->HostWrite.TransportRequest));
2688         writel( CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
2689
2690         /* under certain very rare conditions, this can take awhile.
2691          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
2692          * as we enter this code.) */
2693         for(i=0;i<MAX_CONFIG_WAIT;i++) {
2694                 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
2695                         break;
2696                 /* delay and try again */
2697                 set_current_state(TASK_INTERRUPTIBLE);
2698                 schedule_timeout(10);
2699         }
2700
2701 #ifdef CCISS_DEBUG
2702         printk(KERN_DEBUG "I counter got to %d %x\n", i, readl(c->vaddr + SA5_DOORBELL));
2703 #endif /* CCISS_DEBUG */
2704 #ifdef CCISS_DEBUG
2705         print_cfg_table(c->cfgtable);
2706 #endif /* CCISS_DEBUG */
2707
2708         if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple))
2709         {
2710                 printk(KERN_WARNING "cciss: unable to get board into"
2711                                         " simple mode\n");
2712                 return -1;
2713         }
2714         return 0;
2715
2716 }
2717
2718 /*
2719  * Gets information about the local volumes attached to the controller.
2720  */
2721 static void cciss_getgeometry(int cntl_num)
2722 {
2723         ReportLunData_struct *ld_buff;
2724         ReadCapdata_struct *size_buff;
2725         InquiryData_struct *inq_buff;
2726         int return_code;
2727         int i;
2728         int listlength = 0;
2729         __u32 lunid = 0;
2730         int block_size;
2731         int total_size;
2732
2733         ld_buff = kmalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2734         if (ld_buff == NULL)
2735         {
2736                 printk(KERN_ERR "cciss: out of memory\n");
2737                 return;
2738         }
2739         memset(ld_buff, 0, sizeof(ReportLunData_struct));
2740         size_buff = kmalloc(sizeof( ReadCapdata_struct), GFP_KERNEL);
2741         if (size_buff == NULL)
2742         {
2743                 printk(KERN_ERR "cciss: out of memory\n");
2744                 kfree(ld_buff);
2745                 return;
2746         }
2747         inq_buff = kmalloc(sizeof( InquiryData_struct), GFP_KERNEL);
2748         if (inq_buff == NULL)
2749         {
2750                 printk(KERN_ERR "cciss: out of memory\n");
2751                 kfree(ld_buff);
2752                 kfree(size_buff);
2753                 return;
2754         }
2755         /* Get the firmware version */
2756         return_code = sendcmd(CISS_INQUIRY, cntl_num, inq_buff,
2757                 sizeof(InquiryData_struct), 0, 0 ,0, NULL, TYPE_CMD);
2758         if (return_code == IO_OK)
2759         {
2760                 hba[cntl_num]->firm_ver[0] = inq_buff->data_byte[32];
2761                 hba[cntl_num]->firm_ver[1] = inq_buff->data_byte[33];
2762                 hba[cntl_num]->firm_ver[2] = inq_buff->data_byte[34];
2763                 hba[cntl_num]->firm_ver[3] = inq_buff->data_byte[35];
2764         } else /* send command failed */
2765         {
2766                 printk(KERN_WARNING "cciss: unable to determine firmware"
2767                         " version of controller\n");
2768         }
2769         /* Get the number of logical volumes */
2770         return_code = sendcmd(CISS_REPORT_LOG, cntl_num, ld_buff,
2771                         sizeof(ReportLunData_struct), 0, 0, 0, NULL, TYPE_CMD);
2772
2773         if( return_code == IO_OK)
2774         {
2775 #ifdef CCISS_DEBUG
2776                 printk("LUN Data\n--------------------------\n");
2777 #endif /* CCISS_DEBUG */
2778
2779                 listlength |= (0xff & (unsigned int)(ld_buff->LUNListLength[0])) << 24;
2780                 listlength |= (0xff & (unsigned int)(ld_buff->LUNListLength[1])) << 16;
2781                 listlength |= (0xff & (unsigned int)(ld_buff->LUNListLength[2])) << 8;
2782                 listlength |= 0xff & (unsigned int)(ld_buff->LUNListLength[3]);
2783         } else /* reading number of logical volumes failed */
2784         {
2785                 printk(KERN_WARNING "cciss: report logical volume"
2786                         " command failed\n");
2787                 listlength = 0;
2788         }
2789         hba[cntl_num]->num_luns = listlength / 8; // 8 bytes pre entry
2790         if (hba[cntl_num]->num_luns > CISS_MAX_LUN)
2791         {
2792                 printk(KERN_ERR "ciss:  only %d number of logical volumes supported\n",
2793                         CISS_MAX_LUN);
2794                 hba[cntl_num]->num_luns = CISS_MAX_LUN;
2795         }
2796 #ifdef CCISS_DEBUG
2797         printk(KERN_DEBUG "Length = %x %x %x %x = %d\n", ld_buff->LUNListLength[0],
2798                 ld_buff->LUNListLength[1], ld_buff->LUNListLength[2],
2799                 ld_buff->LUNListLength[3],  hba[cntl_num]->num_luns);
2800 #endif /* CCISS_DEBUG */
2801
2802         hba[cntl_num]->highest_lun = hba[cntl_num]->num_luns-1;
2803 //      for(i=0; i<  hba[cntl_num]->num_luns; i++)
2804         for(i=0; i < CISS_MAX_LUN; i++)
2805         {
2806                 if (i < hba[cntl_num]->num_luns){
2807                         lunid = (0xff & (unsigned int)(ld_buff->LUN[i][3]))
2808                                  << 24;
2809                         lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][2]))
2810                                  << 16;
2811                         lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][1]))
2812                                  << 8;
2813                 lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]);
2814
2815                 hba[cntl_num]->drv[i].LunID = lunid;
2816
2817
2818 #ifdef CCISS_DEBUG
2819                 printk(KERN_DEBUG "LUN[%d]:  %x %x %x %x = %x\n", i,
2820                         ld_buff->LUN[i][0], ld_buff->LUN[i][1],
2821                         ld_buff->LUN[i][2], ld_buff->LUN[i][3],
2822                         hba[cntl_num]->drv[i].LunID);
2823 #endif /* CCISS_DEBUG */
2824                 cciss_read_capacity(cntl_num, i, size_buff, 0,
2825                         &total_size, &block_size);
2826                         cciss_geometry_inquiry(cntl_num, i, 0, total_size,
2827                                 block_size, inq_buff, &hba[cntl_num]->drv[i]);
2828                 } else {
2829                         /* initialize raid_level to indicate a free space */
2830                         hba[cntl_num]->drv[i].raid_level = -1;
2831                 }
2832         }
2833         kfree(ld_buff);
2834         kfree(size_buff);
2835         kfree(inq_buff);
2836 }
2837
2838 /* Function to find the first free pointer into our hba[] array */
2839 /* Returns -1 if no free entries are left.  */
2840 static int alloc_cciss_hba(void)
2841 {
2842         struct gendisk *disk[NWD];
2843         int i, n;
2844         for (n = 0; n < NWD; n++) {
2845                 disk[n] = alloc_disk(1 << NWD_SHIFT);
2846                 if (!disk[n])
2847                         goto out;
2848         }
2849
2850         for(i=0; i< MAX_CTLR; i++) {
2851                 if (!hba[i]) {
2852                         ctlr_info_t *p;
2853                         p = kmalloc(sizeof(ctlr_info_t), GFP_KERNEL);
2854                         if (!p)
2855                                 goto Enomem;
2856                         memset(p, 0, sizeof(ctlr_info_t));
2857                         for (n = 0; n < NWD; n++)
2858                                 p->gendisk[n] = disk[n];
2859                         hba[i] = p;
2860                         return i;
2861                 }
2862         }
2863         printk(KERN_WARNING "cciss: This driver supports a maximum"
2864                 " of %d controllers.\n", MAX_CTLR);
2865         goto out;
2866 Enomem:
2867         printk(KERN_ERR "cciss: out of memory.\n");
2868 out:
2869         while (n--)
2870                 put_disk(disk[n]);
2871         return -1;
2872 }
2873
2874 static void free_hba(int i)
2875 {
2876         ctlr_info_t *p = hba[i];
2877         int n;
2878
2879         hba[i] = NULL;
2880         for (n = 0; n < NWD; n++)
2881                 put_disk(p->gendisk[n]);
2882         kfree(p);
2883 }
2884
2885 /*
2886  *  This is it.  Find all the controllers and register them.  I really hate
2887  *  stealing all these major device numbers.
2888  *  returns the number of block devices registered.
2889  */
2890 static int __devinit cciss_init_one(struct pci_dev *pdev,
2891         const struct pci_device_id *ent)
2892 {
2893         request_queue_t *q;
2894         int i;
2895         int j;
2896         int rc;
2897
2898         printk(KERN_DEBUG "cciss: Device 0x%x has been found at"
2899                         " bus %d dev %d func %d\n",
2900                 pdev->device, pdev->bus->number, PCI_SLOT(pdev->devfn),
2901                         PCI_FUNC(pdev->devfn));
2902         i = alloc_cciss_hba();
2903         if(i < 0)
2904                 return (-1);
2905
2906         hba[i]->busy_initializing = 1;
2907
2908         if (cciss_pci_init(hba[i], pdev) != 0)
2909                 goto clean1;
2910
2911         sprintf(hba[i]->devname, "cciss%d", i);
2912         hba[i]->ctlr = i;
2913         hba[i]->pdev = pdev;
2914
2915         /* configure PCI DMA stuff */
2916         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK))
2917                 printk("cciss: using DAC cycles\n");
2918         else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK))
2919                 printk("cciss: not using DAC cycles\n");
2920         else {
2921                 printk("cciss: no suitable DMA available\n");
2922                 goto clean1;
2923         }
2924
2925         /*
2926          * register with the major number, or get a dynamic major number
2927          * by passing 0 as argument.  This is done for greater than
2928          * 8 controller support.
2929          */
2930         if (i < MAX_CTLR_ORIG)
2931                 hba[i]->major = MAJOR_NR + i;
2932         rc = register_blkdev(hba[i]->major, hba[i]->devname);
2933         if(rc == -EBUSY || rc == -EINVAL) {
2934                 printk(KERN_ERR
2935                         "cciss:  Unable to get major number %d for %s "
2936                         "on hba %d\n", hba[i]->major, hba[i]->devname, i);
2937                 goto clean1;
2938         }
2939         else {
2940                 if (i >= MAX_CTLR_ORIG)
2941                         hba[i]->major = rc;
2942         }
2943
2944         /* make sure the board interrupts are off */
2945         hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
2946         if( request_irq(hba[i]->intr, do_cciss_intr,
2947                 SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM,
2948                         hba[i]->devname, hba[i])) {
2949                 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
2950                         hba[i]->intr, hba[i]->devname);
2951                 goto clean2;
2952         }
2953         hba[i]->cmd_pool_bits = kmalloc(((NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG)*sizeof(unsigned long), GFP_KERNEL);
2954         hba[i]->cmd_pool = (CommandList_struct *)pci_alloc_consistent(
2955                 hba[i]->pdev, NR_CMDS * sizeof(CommandList_struct),
2956                 &(hba[i]->cmd_pool_dhandle));
2957         hba[i]->errinfo_pool = (ErrorInfo_struct *)pci_alloc_consistent(
2958                 hba[i]->pdev, NR_CMDS * sizeof( ErrorInfo_struct),
2959                 &(hba[i]->errinfo_pool_dhandle));
2960         if((hba[i]->cmd_pool_bits == NULL)
2961                 || (hba[i]->cmd_pool == NULL)
2962                 || (hba[i]->errinfo_pool == NULL)) {
2963                 printk( KERN_ERR "cciss: out of memory");
2964                 goto clean4;
2965         }
2966
2967         spin_lock_init(&hba[i]->lock);
2968
2969         /* Initialize the pdev driver private data.
2970                 have it point to hba[i].  */
2971         pci_set_drvdata(pdev, hba[i]);
2972         /* command and error info recs zeroed out before
2973                         they are used */
2974         memset(hba[i]->cmd_pool_bits, 0, ((NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG)*sizeof(unsigned long));
2975
2976 #ifdef CCISS_DEBUG
2977         printk(KERN_DEBUG "Scanning for drives on controller cciss%d\n",i);
2978 #endif /* CCISS_DEBUG */
2979
2980         cciss_getgeometry(i);
2981
2982         cciss_scsi_setup(i);
2983
2984         /* Turn the interrupts on so we can service requests */
2985         hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
2986
2987         cciss_procinit(i);
2988         hba[i]->busy_initializing = 0;
2989
2990         for(j=0; j < NWD; j++) { /* mfm */
2991                 drive_info_struct *drv = &(hba[i]->drv[j]);
2992                 struct gendisk *disk = hba[i]->gendisk[j];
2993
2994                 q = blk_init_queue(do_cciss_request, &hba[i]->lock);
2995                 if (!q) {
2996                         printk(KERN_ERR
2997                            "cciss:  unable to allocate queue for disk %d\n",
2998                            j);
2999                         break;
3000                 }
3001                 drv->queue = q;
3002
3003                 q->backing_dev_info.ra_pages = READ_AHEAD;
3004         blk_queue_bounce_limit(q, hba[i]->pdev->dma_mask);
3005
3006         /* This is a hardware imposed limit. */
3007         blk_queue_max_hw_segments(q, MAXSGENTRIES);
3008
3009         /* This is a limit in the driver and could be eliminated. */
3010         blk_queue_max_phys_segments(q, MAXSGENTRIES);
3011
3012         blk_queue_max_sectors(q, 512);
3013
3014                 q->queuedata = hba[i];
3015                 sprintf(disk->disk_name, "cciss/c%dd%d", i, j);
3016                 sprintf(disk->devfs_name, "cciss/host%d/target%d", i, j);
3017                 disk->major = hba[i]->major;
3018                 disk->first_minor = j << NWD_SHIFT;
3019                 disk->fops = &cciss_fops;
3020                 disk->queue = q;
3021                 disk->private_data = drv;
3022                 /* we must register the controller even if no disks exist */
3023                 /* this is for the online array utilities */
3024                 if(!drv->heads && j)
3025                         continue;
3026                 blk_queue_hardsect_size(q, drv->block_size);
3027                 set_capacity(disk, drv->nr_blocks);
3028                 add_disk(disk);
3029         }
3030
3031         return(1);
3032
3033 clean4:
3034         kfree(hba[i]->cmd_pool_bits);
3035         if(hba[i]->cmd_pool)
3036                 pci_free_consistent(hba[i]->pdev,
3037                         NR_CMDS * sizeof(CommandList_struct),
3038                         hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3039         if(hba[i]->errinfo_pool)
3040                 pci_free_consistent(hba[i]->pdev,
3041                         NR_CMDS * sizeof( ErrorInfo_struct),
3042                         hba[i]->errinfo_pool,
3043                         hba[i]->errinfo_pool_dhandle);
3044         free_irq(hba[i]->intr, hba[i]);
3045 clean2:
3046         unregister_blkdev(hba[i]->major, hba[i]->devname);
3047 clean1:
3048         release_io_mem(hba[i]);
3049         free_hba(i);
3050         hba[i]->busy_initializing = 0;
3051         return(-1);
3052 }
3053
3054 static void __devexit cciss_remove_one (struct pci_dev *pdev)
3055 {
3056         ctlr_info_t *tmp_ptr;
3057         int i, j;
3058         char flush_buf[4];
3059         int return_code;
3060
3061         if (pci_get_drvdata(pdev) == NULL)
3062         {
3063                 printk( KERN_ERR "cciss: Unable to remove device \n");
3064                 return;
3065         }
3066         tmp_ptr = pci_get_drvdata(pdev);
3067         i = tmp_ptr->ctlr;
3068         if (hba[i] == NULL)
3069         {
3070                 printk(KERN_ERR "cciss: device appears to "
3071                         "already be removed \n");
3072                 return;
3073         }
3074         /* Turn board interrupts off  and send the flush cache command */
3075         /* sendcmd will turn off interrupt, and send the flush...
3076         * To write all data in the battery backed cache to disks */
3077         memset(flush_buf, 0, 4);
3078         return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
3079                                 TYPE_CMD);
3080         if(return_code != IO_OK)
3081         {
3082                 printk(KERN_WARNING "Error Flushing cache on controller %d\n",
3083                         i);
3084         }
3085         free_irq(hba[i]->intr, hba[i]);
3086         pci_set_drvdata(pdev, NULL);
3087         iounmap(hba[i]->vaddr);
3088         cciss_unregister_scsi(i);  /* unhook from SCSI subsystem */
3089         unregister_blkdev(hba[i]->major, hba[i]->devname);
3090         remove_proc_entry(hba[i]->devname, proc_cciss);
3091
3092         /* remove it from the disk list */
3093         for (j = 0; j < NWD; j++) {
3094                 struct gendisk *disk = hba[i]->gendisk[j];
3095                 if (disk->flags & GENHD_FL_UP) {
3096                         del_gendisk(disk);
3097                         blk_cleanup_queue(disk->queue);
3098                 }
3099         }
3100
3101         pci_free_consistent(hba[i]->pdev, NR_CMDS * sizeof(CommandList_struct),
3102                             hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3103         pci_free_consistent(hba[i]->pdev, NR_CMDS * sizeof( ErrorInfo_struct),
3104                 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
3105         kfree(hba[i]->cmd_pool_bits);
3106         release_io_mem(hba[i]);
3107         free_hba(i);
3108 }
3109
3110 static struct pci_driver cciss_pci_driver = {
3111         .name =         "cciss",
3112         .probe =        cciss_init_one,
3113         .remove =       __devexit_p(cciss_remove_one),
3114         .id_table =     cciss_pci_device_id, /* id_table */
3115 };
3116
3117 /*
3118  *  This is it.  Register the PCI driver information for the cards we control
3119  *  the OS will call our registered routines when it finds one of our cards.
3120  */
3121 static int __init cciss_init(void)
3122 {
3123         printk(KERN_INFO DRIVER_NAME "\n");
3124
3125         /* Register for our PCI devices */
3126         return pci_module_init(&cciss_pci_driver);
3127 }
3128
3129 static void __exit cciss_cleanup(void)
3130 {
3131         int i;
3132
3133         pci_unregister_driver(&cciss_pci_driver);
3134         /* double check that all controller entrys have been removed */
3135         for (i=0; i< MAX_CTLR; i++)
3136         {
3137                 if (hba[i] != NULL)
3138                 {
3139                         printk(KERN_WARNING "cciss: had to remove"
3140                                         " controller %d\n", i);
3141                         cciss_remove_one(hba[i]->pdev);
3142                 }
3143         }
3144         remove_proc_entry("cciss", proc_root_driver);
3145 }
3146
3147 static void fail_all_cmds(unsigned long ctlr)
3148 {
3149         /* If we get here, the board is apparently dead. */
3150         ctlr_info_t *h = hba[ctlr];
3151         CommandList_struct *c;
3152         unsigned long flags;
3153
3154         printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
3155         h->alive = 0;   /* the controller apparently died... */
3156
3157         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
3158
3159         pci_disable_device(h->pdev); /* Make sure it is really dead. */
3160
3161         /* move everything off the request queue onto the completed queue */
3162         while( (c = h->reqQ) != NULL ) {
3163                 removeQ(&(h->reqQ), c);
3164                 h->Qdepth--;
3165                 addQ (&(h->cmpQ), c);
3166         }
3167
3168         /* Now, fail everything on the completed queue with a HW error */
3169         while( (c = h->cmpQ) != NULL ) {
3170                 removeQ(&h->cmpQ, c);
3171                 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
3172                 if (c->cmd_type == CMD_RWREQ) {
3173                         complete_command(h, c, 0);
3174                 } else if (c->cmd_type == CMD_IOCTL_PEND)
3175                         complete(c->waiting);
3176 #ifdef CONFIG_CISS_SCSI_TAPE
3177                         else if (c->cmd_type == CMD_SCSI)
3178                                 complete_scsi_command(c, 0, 0);
3179 #endif
3180         }
3181         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
3182         return;
3183 }
3184
3185 module_init(cciss_init);
3186 module_exit(cciss_cleanup);