drivers/scsi/hpsa.c

   1 /*
   2  *    Disk Array driver for HP Smart Array SAS controllers
   3  *    Copyright 2000, 2009 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; version 2 of the License.
   8  *
   9  *    This program is distributed in the hope that it will be useful,
  10  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  12  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  13  *
  14  *    You should have received a copy of the GNU General Public License
  15  *    along with this program; if not, write to the Free Software
  16  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  *
  18  *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/types.h>
  25 #include <linux/pci.h>
  26 #include <linux/kernel.h>
  27 #include <linux/slab.h>
  28 #include <linux/delay.h>
  29 #include <linux/fs.h>
  30 #include <linux/timer.h>
  31 #include <linux/seq_file.h>
  32 #include <linux/init.h>
  33 #include <linux/spinlock.h>
  34 #include <linux/smp_lock.h>
  35 #include <linux/compat.h>
  36 #include <linux/blktrace_api.h>
  37 #include <linux/uaccess.h>
  38 #include <linux/io.h>
  39 #include <linux/dma-mapping.h>
  40 #include <linux/completion.h>
  41 #include <linux/moduleparam.h>
  42 #include <scsi/scsi.h>
  43 #include <scsi/scsi_cmnd.h>
  44 #include <scsi/scsi_device.h>
  45 #include <scsi/scsi_host.h>
  46 #include <scsi/scsi_tcq.h>
  47 #include <linux/cciss_ioctl.h>
  48 #include <linux/string.h>
  49 #include <linux/bitmap.h>
  50 #include <asm/atomic.h>
  51 #include <linux/kthread.h>
  52 #include "hpsa_cmd.h"
  53 #include "hpsa.h"
  54
  55 /* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
  56 #define HPSA_DRIVER_VERSION "2.0.2-1"
  57 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
  58
  59 /* How long to wait (in milliseconds) for board to go into simple mode */
  60 #define MAX_CONFIG_WAIT 30000
  61 #define MAX_IOCTL_CONFIG_WAIT 1000
  62
  63 /*define how many times we will try a command because of bus resets */
  64 #define MAX_CMD_RETRIES 3
  65
  66 /* Embedded module documentation macros - see modules.h */
  67 MODULE_AUTHOR("Hewlett-Packard Company");
  68 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
  69         HPSA_DRIVER_VERSION);
  70 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
  71 MODULE_VERSION(HPSA_DRIVER_VERSION);
  72 MODULE_LICENSE("GPL");
  73
  74 static int hpsa_allow_any;
  75 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
  76 MODULE_PARM_DESC(hpsa_allow_any,
  77                 "Allow hpsa driver to access unknown HP Smart Array hardware");
  78
  79 /* define the PCI info for the cards we can control */
  80 static const struct pci_device_id hpsa_pci_device_id[] = {
  81         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
  82         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
  83         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
  84         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
  85         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
  86         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324a},
  87         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324b},
  88         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
  89 #define PCI_DEVICE_ID_HP_CISSF 0x333f
  90         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x333F},
  91         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,             PCI_ANY_ID, PCI_ANY_ID,
  92                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
  93         {0,}
  94 };
  95
  96 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
  97
  98 /*  board_id = Subsystem Device ID & Vendor ID
  99  *  product = Marketing Name for the board
 100  *  access = Address of the struct of function pointers
 101  */
 102 static struct board_type products[] = {
 103         {0x3241103C, "Smart Array P212", &SA5_access},
 104         {0x3243103C, "Smart Array P410", &SA5_access},
 105         {0x3245103C, "Smart Array P410i", &SA5_access},
 106         {0x3247103C, "Smart Array P411", &SA5_access},
 107         {0x3249103C, "Smart Array P812", &SA5_access},
 108         {0x324a103C, "Smart Array P712m", &SA5_access},
 109         {0x324b103C, "Smart Array P711m", &SA5_access},
 110         {0x3233103C, "StorageWorks P1210m", &SA5_access},
 111         {0x333F103C, "StorageWorks P1210m", &SA5_access},
 112         {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 113 };
 114
 115 static int number_of_controllers;
 116
 117 static irqreturn_t do_hpsa_intr(int irq, void *dev_id);
 118 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
 119 static void start_io(struct ctlr_info *h);
 120
 121 #ifdef CONFIG_COMPAT
 122 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
 123 #endif
 124
 125 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 126 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
 127 static struct CommandList *cmd_alloc(struct ctlr_info *h);
 128 static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
 129 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 130         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
 131         int cmd_type);
 132
 133 static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
 134                 void (*done)(struct scsi_cmnd *));
 135 static void hpsa_scan_start(struct Scsi_Host *);
 136 static int hpsa_scan_finished(struct Scsi_Host *sh,
 137         unsigned long elapsed_time);
 138 static int hpsa_change_queue_depth(struct scsi_device *sdev,
 139         int qdepth, int reason);
 140
 141 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 142 static int hpsa_slave_alloc(struct scsi_device *sdev);
 143 static void hpsa_slave_destroy(struct scsi_device *sdev);
 144
 145 static ssize_t raid_level_show(struct device *dev,
 146         struct device_attribute *attr, char *buf);
 147 static ssize_t lunid_show(struct device *dev,
 148         struct device_attribute *attr, char *buf);
 149 static ssize_t unique_id_show(struct device *dev,
 150         struct device_attribute *attr, char *buf);
 151 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
 152 static ssize_t host_store_rescan(struct device *dev,
 153          struct device_attribute *attr, const char *buf, size_t count);
 154 static int check_for_unit_attention(struct ctlr_info *h,
 155         struct CommandList *c);
 156 static void check_ioctl_unit_attention(struct ctlr_info *h,
 157         struct CommandList *c);
 158 /* performant mode helper functions */
 159 static void calc_bucket_map(int *bucket, int num_buckets,
 160         int nsgs, int *bucket_map);
 161 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 162 static inline u32 next_command(struct ctlr_info *h);
 163
 164 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
 165 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
 166 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
 167 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 168
 169 static struct device_attribute *hpsa_sdev_attrs[] = {
 170         &dev_attr_raid_level,
 171         &dev_attr_lunid,
 172         &dev_attr_unique_id,
 173         NULL,
 174 };
 175
 176 static struct device_attribute *hpsa_shost_attrs[] = {
 177         &dev_attr_rescan,
 178         NULL,
 179 };
 180
 181 static struct scsi_host_template hpsa_driver_template = {
 182         .module                 = THIS_MODULE,
 183         .name                   = "hpsa",
 184         .proc_name              = "hpsa",
 185         .queuecommand           = hpsa_scsi_queue_command,
 186         .scan_start             = hpsa_scan_start,
 187         .scan_finished          = hpsa_scan_finished,
 188         .change_queue_depth     = hpsa_change_queue_depth,
 189         .this_id                = -1,
 190         .use_clustering         = ENABLE_CLUSTERING,
 191         .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 192         .ioctl                  = hpsa_ioctl,
 193         .slave_alloc            = hpsa_slave_alloc,
 194         .slave_destroy          = hpsa_slave_destroy,
 195 #ifdef CONFIG_COMPAT
 196         .compat_ioctl           = hpsa_compat_ioctl,
 197 #endif
 198         .sdev_attrs = hpsa_sdev_attrs,
 199         .shost_attrs = hpsa_shost_attrs,
 200 };
 201
 202 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 203 {
 204         unsigned long *priv = shost_priv(sdev->host);
 205         return (struct ctlr_info *) *priv;
 206 }
 207
 208 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 209 {
 210         unsigned long *priv = shost_priv(sh);
 211         return (struct ctlr_info *) *priv;
 212 }
 213
 214 static int check_for_unit_attention(struct ctlr_info *h,
 215         struct CommandList *c)
 216 {
 217         if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
 218                 return 0;
 219
 220         switch (c->err_info->SenseInfo[12]) {
 221         case STATE_CHANGED:
 222                 dev_warn(&h->pdev->dev, "hpsa%d: a state change "
 223                         "detected, command retried\n", h->ctlr);
 224                 break;
 225         case LUN_FAILED:
 226                 dev_warn(&h->pdev->dev, "hpsa%d: LUN failure "
 227                         "detected, action required\n", h->ctlr);
 228                 break;
 229         case REPORT_LUNS_CHANGED:
 230                 dev_warn(&h->pdev->dev, "hpsa%d: report LUN data "
 231                         "changed, action required\n", h->ctlr);
 232         /*
 233          * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
 234          */
 235                 break;
 236         case POWER_OR_RESET:
 237                 dev_warn(&h->pdev->dev, "hpsa%d: a power on "
 238                         "or device reset detected\n", h->ctlr);
 239                 break;
 240         case UNIT_ATTENTION_CLEARED:
 241                 dev_warn(&h->pdev->dev, "hpsa%d: unit attention "
 242                     "cleared by another initiator\n", h->ctlr);
 243                 break;
 244         default:
 245                 dev_warn(&h->pdev->dev, "hpsa%d: unknown "
 246                         "unit attention detected\n", h->ctlr);
 247                 break;
 248         }
 249         return 1;
 250 }
 251
 252 static ssize_t host_store_rescan(struct device *dev,
 253                                  struct device_attribute *attr,
 254                                  const char *buf, size_t count)
 255 {
 256         struct ctlr_info *h;
 257         struct Scsi_Host *shost = class_to_shost(dev);
 258         h = shost_to_hba(shost);
 259         hpsa_scan_start(h->scsi_host);
 260         return count;
 261 }
 262
 263 /* Enqueuing and dequeuing functions for cmdlists. */
 264 static inline void addQ(struct hlist_head *list, struct CommandList *c)
 265 {
 266         hlist_add_head(&c->list, list);
 267 }
 268
 269 static inline u32 next_command(struct ctlr_info *h)
 270 {
 271         u32 a;
 272
 273         if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
 274                 return h->access.command_completed(h);
 275
 276         if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
 277                 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
 278                 (h->reply_pool_head)++;
 279                 h->commands_outstanding--;
 280         } else {
 281                 a = FIFO_EMPTY;
 282         }
 283         /* Check for wraparound */
 284         if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
 285                 h->reply_pool_head = h->reply_pool;
 286                 h->reply_pool_wraparound ^= 1;
 287         }
 288         return a;
 289 }
 290
 291 /* set_performant_mode: Modify the tag for cciss performant
 292  * set bit 0 for pull model, bits 3-1 for block fetch
 293  * register number
 294  */
 295 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
 296 {
 297         if (likely(h->transMethod == CFGTBL_Trans_Performant))
 298                 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
 299 }
 300
 301 static void enqueue_cmd_and_start_io(struct ctlr_info *h,
 302         struct CommandList *c)
 303 {
 304         unsigned long flags;
 305
 306         set_performant_mode(h, c);
 307         spin_lock_irqsave(&h->lock, flags);
 308         addQ(&h->reqQ, c);
 309         h->Qdepth++;
 310         start_io(h);
 311         spin_unlock_irqrestore(&h->lock, flags);
 312 }
 313
 314 static inline void removeQ(struct CommandList *c)
 315 {
 316         if (WARN_ON(hlist_unhashed(&c->list)))
 317                 return;
 318         hlist_del_init(&c->list);
 319 }
 320
 321 static inline int is_hba_lunid(unsigned char scsi3addr[])
 322 {
 323         return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
 324 }
 325
 326 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 327 {
 328         return (scsi3addr[3] & 0xC0) == 0x40;
 329 }
 330
 331 static inline int is_scsi_rev_5(struct ctlr_info *h)
 332 {
 333         if (!h->hba_inquiry_data)
 334                 return 0;
 335         if ((h->hba_inquiry_data[2] & 0x07) == 5)
 336                 return 1;
 337         return 0;
 338 }
 339
 340 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 341         "UNKNOWN"
 342 };
 343 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
 344
 345 static ssize_t raid_level_show(struct device *dev,
 346              struct device_attribute *attr, char *buf)
 347 {
 348         ssize_t l = 0;
 349         unsigned char rlevel;
 350         struct ctlr_info *h;
 351         struct scsi_device *sdev;
 352         struct hpsa_scsi_dev_t *hdev;
 353         unsigned long flags;
 354
 355         sdev = to_scsi_device(dev);
 356         h = sdev_to_hba(sdev);
 357         spin_lock_irqsave(&h->lock, flags);
 358         hdev = sdev->hostdata;
 359         if (!hdev) {
 360                 spin_unlock_irqrestore(&h->lock, flags);
 361                 return -ENODEV;
 362         }
 363
 364         /* Is this even a logical drive? */
 365         if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
 366                 spin_unlock_irqrestore(&h->lock, flags);
 367                 l = snprintf(buf, PAGE_SIZE, "N/A\n");
 368                 return l;
 369         }
 370
 371         rlevel = hdev->raid_level;
 372         spin_unlock_irqrestore(&h->lock, flags);
 373         if (rlevel > RAID_UNKNOWN)
 374                 rlevel = RAID_UNKNOWN;
 375         l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 376         return l;
 377 }
 378
 379 static ssize_t lunid_show(struct device *dev,
 380              struct device_attribute *attr, char *buf)
 381 {
 382         struct ctlr_info *h;
 383         struct scsi_device *sdev;
 384         struct hpsa_scsi_dev_t *hdev;
 385         unsigned long flags;
 386         unsigned char lunid[8];
 387
 388         sdev = to_scsi_device(dev);
 389         h = sdev_to_hba(sdev);
 390         spin_lock_irqsave(&h->lock, flags);
 391         hdev = sdev->hostdata;
 392         if (!hdev) {
 393                 spin_unlock_irqrestore(&h->lock, flags);
 394                 return -ENODEV;
 395         }
 396         memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 397         spin_unlock_irqrestore(&h->lock, flags);
 398         return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 399                 lunid[0], lunid[1], lunid[2], lunid[3],
 400                 lunid[4], lunid[5], lunid[6], lunid[7]);
 401 }
 402
 403 static ssize_t unique_id_show(struct device *dev,
 404              struct device_attribute *attr, char *buf)
 405 {
 406         struct ctlr_info *h;
 407         struct scsi_device *sdev;
 408         struct hpsa_scsi_dev_t *hdev;
 409         unsigned long flags;
 410         unsigned char sn[16];
 411
 412         sdev = to_scsi_device(dev);
 413         h = sdev_to_hba(sdev);
 414         spin_lock_irqsave(&h->lock, flags);
 415         hdev = sdev->hostdata;
 416         if (!hdev) {
 417                 spin_unlock_irqrestore(&h->lock, flags);
 418                 return -ENODEV;
 419         }
 420         memcpy(sn, hdev->device_id, sizeof(sn));
 421         spin_unlock_irqrestore(&h->lock, flags);
 422         return snprintf(buf, 16 * 2 + 2,
 423                         "%02X%02X%02X%02X%02X%02X%02X%02X"
 424                         "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 425                         sn[0], sn[1], sn[2], sn[3],
 426                         sn[4], sn[5], sn[6], sn[7],
 427                         sn[8], sn[9], sn[10], sn[11],
 428                         sn[12], sn[13], sn[14], sn[15]);
 429 }
 430
 431 static int hpsa_find_target_lun(struct ctlr_info *h,
 432         unsigned char scsi3addr[], int bus, int *target, int *lun)
 433 {
 434         /* finds an unused bus, target, lun for a new physical device
 435          * assumes h->devlock is held
 436          */
 437         int i, found = 0;
 438         DECLARE_BITMAP(lun_taken, HPSA_MAX_SCSI_DEVS_PER_HBA);
 439
 440         memset(&lun_taken[0], 0, HPSA_MAX_SCSI_DEVS_PER_HBA >> 3);
 441
 442         for (i = 0; i < h->ndevices; i++) {
 443                 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
 444                         set_bit(h->dev[i]->target, lun_taken);
 445         }
 446
 447         for (i = 0; i < HPSA_MAX_SCSI_DEVS_PER_HBA; i++) {
 448                 if (!test_bit(i, lun_taken)) {
 449                         /* *bus = 1; */
 450                         *target = i;
 451                         *lun = 0;
 452                         found = 1;
 453                         break;
 454                 }
 455         }
 456         return !found;
 457 }
 458
 459 /* Add an entry into h->dev[] array. */
 460 static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
 461                 struct hpsa_scsi_dev_t *device,
 462                 struct hpsa_scsi_dev_t *added[], int *nadded)
 463 {
 464         /* assumes h->devlock is held */
 465         int n = h->ndevices;
 466         int i;
 467         unsigned char addr1[8], addr2[8];
 468         struct hpsa_scsi_dev_t *sd;
 469
 470         if (n >= HPSA_MAX_SCSI_DEVS_PER_HBA) {
 471                 dev_err(&h->pdev->dev, "too many devices, some will be "
 472                         "inaccessible.\n");
 473                 return -1;
 474         }
 475
 476         /* physical devices do not have lun or target assigned until now. */
 477         if (device->lun != -1)
 478                 /* Logical device, lun is already assigned. */
 479                 goto lun_assigned;
 480
 481         /* If this device a non-zero lun of a multi-lun device
 482          * byte 4 of the 8-byte LUN addr will contain the logical
 483          * unit no, zero otherise.
 484          */
 485         if (device->scsi3addr[4] == 0) {
 486                 /* This is not a non-zero lun of a multi-lun device */
 487                 if (hpsa_find_target_lun(h, device->scsi3addr,
 488                         device->bus, &device->target, &device->lun) != 0)
 489                         return -1;
 490                 goto lun_assigned;
 491         }
 492
 493         /* This is a non-zero lun of a multi-lun device.
 494          * Search through our list and find the device which
 495          * has the same 8 byte LUN address, excepting byte 4.
 496          * Assign the same bus and target for this new LUN.
 497          * Use the logical unit number from the firmware.
 498          */
 499         memcpy(addr1, device->scsi3addr, 8);
 500         addr1[4] = 0;
 501         for (i = 0; i < n; i++) {
 502                 sd = h->dev[i];
 503                 memcpy(addr2, sd->scsi3addr, 8);
 504                 addr2[4] = 0;
 505                 /* differ only in byte 4? */
 506                 if (memcmp(addr1, addr2, 8) == 0) {
 507                         device->bus = sd->bus;
 508                         device->target = sd->target;
 509                         device->lun = device->scsi3addr[4];
 510                         break;
 511                 }
 512         }
 513         if (device->lun == -1) {
 514                 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
 515                         " suspect firmware bug or unsupported hardware "
 516                         "configuration.\n");
 517                         return -1;
 518         }
 519
 520 lun_assigned:
 521
 522         h->dev[n] = device;
 523         h->ndevices++;
 524         added[*nadded] = device;
 525         (*nadded)++;
 526
 527         /* initially, (before registering with scsi layer) we don't
 528          * know our hostno and we don't want to print anything first
 529          * time anyway (the scsi layer's inquiries will show that info)
 530          */
 531         /* if (hostno != -1) */
 532                 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
 533                         scsi_device_type(device->devtype), hostno,
 534                         device->bus, device->target, device->lun);
 535         return 0;
 536 }
 537
 538 /* Replace an entry from h->dev[] array. */
 539 static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
 540         int entry, struct hpsa_scsi_dev_t *new_entry,
 541         struct hpsa_scsi_dev_t *added[], int *nadded,
 542         struct hpsa_scsi_dev_t *removed[], int *nremoved)
 543 {
 544         /* assumes h->devlock is held */
 545         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
 546         removed[*nremoved] = h->dev[entry];
 547         (*nremoved)++;
 548         h->dev[entry] = new_entry;
 549         added[*nadded] = new_entry;
 550         (*nadded)++;
 551         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
 552                 scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
 553                         new_entry->target, new_entry->lun);
 554 }
 555
 556 /* Remove an entry from h->dev[] array. */
 557 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
 558         struct hpsa_scsi_dev_t *removed[], int *nremoved)
 559 {
 560         /* assumes h->devlock is held */
 561         int i;
 562         struct hpsa_scsi_dev_t *sd;
 563
 564         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
 565
 566         sd = h->dev[entry];
 567         removed[*nremoved] = h->dev[entry];
 568         (*nremoved)++;
 569
 570         for (i = entry; i < h->ndevices-1; i++)
 571                 h->dev[i] = h->dev[i+1];
 572         h->ndevices--;
 573         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
 574                 scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
 575                 sd->lun);
 576 }
 577
 578 #define SCSI3ADDR_EQ(a, b) ( \
 579         (a)[7] == (b)[7] && \
 580         (a)[6] == (b)[6] && \
 581         (a)[5] == (b)[5] && \
 582         (a)[4] == (b)[4] && \
 583         (a)[3] == (b)[3] && \
 584         (a)[2] == (b)[2] && \
 585         (a)[1] == (b)[1] && \
 586         (a)[0] == (b)[0])
 587
 588 static void fixup_botched_add(struct ctlr_info *h,
 589         struct hpsa_scsi_dev_t *added)
 590 {
 591         /* called when scsi_add_device fails in order to re-adjust
 592          * h->dev[] to match the mid layer's view.
 593          */
 594         unsigned long flags;
 595         int i, j;
 596
 597         spin_lock_irqsave(&h->lock, flags);
 598         for (i = 0; i < h->ndevices; i++) {
 599                 if (h->dev[i] == added) {
 600                         for (j = i; j < h->ndevices-1; j++)
 601                                 h->dev[j] = h->dev[j+1];
 602                         h->ndevices--;
 603                         break;
 604                 }
 605         }
 606         spin_unlock_irqrestore(&h->lock, flags);
 607         kfree(added);
 608 }
 609
 610 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
 611         struct hpsa_scsi_dev_t *dev2)
 612 {
 613         if ((is_logical_dev_addr_mode(dev1->scsi3addr) ||
 614                 (dev1->lun != -1 && dev2->lun != -1)) &&
 615                 dev1->devtype != 0x0C)
 616                 return (memcmp(dev1, dev2, sizeof(*dev1)) == 0);
 617
 618         /* we compare everything except lun and target as these
 619          * are not yet assigned.  Compare parts likely
 620          * to differ first
 621          */
 622         if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
 623                 sizeof(dev1->scsi3addr)) != 0)
 624                 return 0;
 625         if (memcmp(dev1->device_id, dev2->device_id,
 626                 sizeof(dev1->device_id)) != 0)
 627                 return 0;
 628         if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
 629                 return 0;
 630         if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
 631                 return 0;
 632         if (memcmp(dev1->revision, dev2->revision, sizeof(dev1->revision)) != 0)
 633                 return 0;
 634         if (dev1->devtype != dev2->devtype)
 635                 return 0;
 636         if (dev1->raid_level != dev2->raid_level)
 637                 return 0;
 638         if (dev1->bus != dev2->bus)
 639                 return 0;
 640         return 1;
 641 }
 642
 643 /* Find needle in haystack.  If exact match found, return DEVICE_SAME,
 644  * and return needle location in *index.  If scsi3addr matches, but not
 645  * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
 646  * location in *index.  If needle not found, return DEVICE_NOT_FOUND.
 647  */
 648 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
 649         struct hpsa_scsi_dev_t *haystack[], int haystack_size,
 650         int *index)
 651 {
 652         int i;
 653 #define DEVICE_NOT_FOUND 0
 654 #define DEVICE_CHANGED 1
 655 #define DEVICE_SAME 2
 656         for (i = 0; i < haystack_size; i++) {
 657                 if (haystack[i] == NULL) /* previously removed. */
 658                         continue;
 659                 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
 660                         *index = i;
 661                         if (device_is_the_same(needle, haystack[i]))
 662                                 return DEVICE_SAME;
 663                         else
 664                                 return DEVICE_CHANGED;
 665                 }
 666         }
 667         *index = -1;
 668         return DEVICE_NOT_FOUND;
 669 }
 670
 671 static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
 672         struct hpsa_scsi_dev_t *sd[], int nsds)
 673 {
 674         /* sd contains scsi3 addresses and devtypes, and inquiry
 675          * data.  This function takes what's in sd to be the current
 676          * reality and updates h->dev[] to reflect that reality.
 677          */
 678         int i, entry, device_change, changes = 0;
 679         struct hpsa_scsi_dev_t *csd;
 680         unsigned long flags;
 681         struct hpsa_scsi_dev_t **added, **removed;
 682         int nadded, nremoved;
 683         struct Scsi_Host *sh = NULL;
 684
 685         added = kzalloc(sizeof(*added) * HPSA_MAX_SCSI_DEVS_PER_HBA,
 686                 GFP_KERNEL);
 687         removed = kzalloc(sizeof(*removed) * HPSA_MAX_SCSI_DEVS_PER_HBA,
 688                 GFP_KERNEL);
 689
 690         if (!added || !removed) {
 691                 dev_warn(&h->pdev->dev, "out of memory in "
 692                         "adjust_hpsa_scsi_table\n");
 693                 goto free_and_out;
 694         }
 695
 696         spin_lock_irqsave(&h->devlock, flags);
 697
 698         /* find any devices in h->dev[] that are not in
 699          * sd[] and remove them from h->dev[], and for any
 700          * devices which have changed, remove the old device
 701          * info and add the new device info.
 702          */
 703         i = 0;
 704         nremoved = 0;
 705         nadded = 0;
 706         while (i < h->ndevices) {
 707                 csd = h->dev[i];
 708                 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
 709                 if (device_change == DEVICE_NOT_FOUND) {
 710                         changes++;
 711                         hpsa_scsi_remove_entry(h, hostno, i,
 712                                 removed, &nremoved);
 713                         continue; /* remove ^^^, hence i not incremented */
 714                 } else if (device_change == DEVICE_CHANGED) {
 715                         changes++;
 716                         hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
 717                                 added, &nadded, removed, &nremoved);
 718                         /* Set it to NULL to prevent it from being freed
 719                          * at the bottom of hpsa_update_scsi_devices()
 720                          */
 721                         sd[entry] = NULL;
 722                 }
 723                 i++;
 724         }
 725
 726         /* Now, make sure every device listed in sd[] is also
 727          * listed in h->dev[], adding them if they aren't found
 728          */
 729
 730         for (i = 0; i < nsds; i++) {
 731                 if (!sd[i]) /* if already added above. */
 732                         continue;
 733                 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
 734                                         h->ndevices, &entry);
 735                 if (device_change == DEVICE_NOT_FOUND) {
 736                         changes++;
 737                         if (hpsa_scsi_add_entry(h, hostno, sd[i],
 738                                 added, &nadded) != 0)
 739                                 break;
 740                         sd[i] = NULL; /* prevent from being freed later. */
 741                 } else if (device_change == DEVICE_CHANGED) {
 742                         /* should never happen... */
 743                         changes++;
 744                         dev_warn(&h->pdev->dev,
 745                                 "device unexpectedly changed.\n");
 746                         /* but if it does happen, we just ignore that device */
 747                 }
 748         }
 749         spin_unlock_irqrestore(&h->devlock, flags);
 750
 751         /* Don't notify scsi mid layer of any changes the first time through
 752          * (or if there are no changes) scsi_scan_host will do it later the
 753          * first time through.
 754          */
 755         if (hostno == -1 || !changes)
 756                 goto free_and_out;
 757
 758         sh = h->scsi_host;
 759         /* Notify scsi mid layer of any removed devices */
 760         for (i = 0; i < nremoved; i++) {
 761                 struct scsi_device *sdev =
 762                         scsi_device_lookup(sh, removed[i]->bus,
 763                                 removed[i]->target, removed[i]->lun);
 764                 if (sdev != NULL) {
 765                         scsi_remove_device(sdev);
 766                         scsi_device_put(sdev);
 767                 } else {
 768                         /* We don't expect to get here.
 769                          * future cmds to this device will get selection
 770                          * timeout as if the device was gone.
 771                          */
 772                         dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
 773                                 " for removal.", hostno, removed[i]->bus,
 774                                 removed[i]->target, removed[i]->lun);
 775                 }
 776                 kfree(removed[i]);
 777                 removed[i] = NULL;
 778         }
 779
 780         /* Notify scsi mid layer of any added devices */
 781         for (i = 0; i < nadded; i++) {
 782                 if (scsi_add_device(sh, added[i]->bus,
 783                         added[i]->target, added[i]->lun) == 0)
 784                         continue;
 785                 dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
 786                         "device not added.\n", hostno, added[i]->bus,
 787                         added[i]->target, added[i]->lun);
 788                 /* now we have to remove it from h->dev,
 789                  * since it didn't get added to scsi mid layer
 790                  */
 791                 fixup_botched_add(h, added[i]);
 792         }
 793
 794 free_and_out:
 795         kfree(added);
 796         kfree(removed);
 797 }
 798
 799 /*
 800  * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
 801  * Assume's h->devlock is held.
 802  */
 803 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
 804         int bus, int target, int lun)
 805 {
 806         int i;
 807         struct hpsa_scsi_dev_t *sd;
 808
 809         for (i = 0; i < h->ndevices; i++) {
 810                 sd = h->dev[i];
 811                 if (sd->bus == bus && sd->target == target && sd->lun == lun)
 812                         return sd;
 813         }
 814         return NULL;
 815 }
 816
 817 /* link sdev->hostdata to our per-device structure. */
 818 static int hpsa_slave_alloc(struct scsi_device *sdev)
 819 {
 820         struct hpsa_scsi_dev_t *sd;
 821         unsigned long flags;
 822         struct ctlr_info *h;
 823
 824         h = sdev_to_hba(sdev);
 825         spin_lock_irqsave(&h->devlock, flags);
 826         sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
 827                 sdev_id(sdev), sdev->lun);
 828         if (sd != NULL)
 829                 sdev->hostdata = sd;
 830         spin_unlock_irqrestore(&h->devlock, flags);
 831         return 0;
 832 }
 833
 834 static void hpsa_slave_destroy(struct scsi_device *sdev)
 835 {
 836         /* nothing to do. */
 837 }
 838
 839 static void hpsa_scsi_setup(struct ctlr_info *h)
 840 {
 841         h->ndevices = 0;
 842         h->scsi_host = NULL;
 843         spin_lock_init(&h->devlock);
 844 }
 845
 846 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
 847 {
 848         int i;
 849
 850         if (!h->cmd_sg_list)
 851                 return;
 852         for (i = 0; i < h->nr_cmds; i++) {
 853                 kfree(h->cmd_sg_list[i]);
 854                 h->cmd_sg_list[i] = NULL;
 855         }
 856         kfree(h->cmd_sg_list);
 857         h->cmd_sg_list = NULL;
 858 }
 859
 860 static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
 861 {
 862         int i;
 863
 864         if (h->chainsize <= 0)
 865                 return 0;
 866
 867         h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
 868                                 GFP_KERNEL);
 869         if (!h->cmd_sg_list)
 870                 return -ENOMEM;
 871         for (i = 0; i < h->nr_cmds; i++) {
 872                 h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
 873                                                 h->chainsize, GFP_KERNEL);
 874                 if (!h->cmd_sg_list[i])
 875                         goto clean;
 876         }
 877         return 0;
 878
 879 clean:
 880         hpsa_free_sg_chain_blocks(h);
 881         return -ENOMEM;
 882 }
 883
 884 static void hpsa_map_sg_chain_block(struct ctlr_info *h,
 885         struct CommandList *c)
 886 {
 887         struct SGDescriptor *chain_sg, *chain_block;
 888         u64 temp64;
 889
 890         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
 891         chain_block = h->cmd_sg_list[c->cmdindex];
 892         chain_sg->Ext = HPSA_SG_CHAIN;
 893         chain_sg->Len = sizeof(*chain_sg) *
 894                 (c->Header.SGTotal - h->max_cmd_sg_entries);
 895         temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
 896                                 PCI_DMA_TODEVICE);
 897         chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
 898         chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
 899 }
 900
 901 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
 902         struct CommandList *c)
 903 {
 904         struct SGDescriptor *chain_sg;
 905         union u64bit temp64;
 906
 907         if (c->Header.SGTotal <= h->max_cmd_sg_entries)
 908                 return;
 909
 910         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
 911         temp64.val32.lower = chain_sg->Addr.lower;
 912         temp64.val32.upper = chain_sg->Addr.upper;
 913         pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
 914 }
 915
 916 static void complete_scsi_command(struct CommandList *cp,
 917         int timeout, u32 tag)
 918 {
 919         struct scsi_cmnd *cmd;
 920         struct ctlr_info *h;
 921         struct ErrorInfo *ei;
 922
 923         unsigned char sense_key;
 924         unsigned char asc;      /* additional sense code */
 925         unsigned char ascq;     /* additional sense code qualifier */
 926
 927         ei = cp->err_info;
 928         cmd = (struct scsi_cmnd *) cp->scsi_cmd;
 929         h = cp->h;
 930
 931         scsi_dma_unmap(cmd); /* undo the DMA mappings */
 932         if (cp->Header.SGTotal > h->max_cmd_sg_entries)
 933                 hpsa_unmap_sg_chain_block(h, cp);
 934
 935         cmd->result = (DID_OK << 16);           /* host byte */
 936         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
 937         cmd->result |= ei->ScsiStatus;
 938
 939         /* copy the sense data whether we need to or not. */
 940         memcpy(cmd->sense_buffer, ei->SenseInfo,
 941                 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
 942                         SCSI_SENSE_BUFFERSIZE :
 943                         ei->SenseLen);
 944         scsi_set_resid(cmd, ei->ResidualCnt);
 945
 946         if (ei->CommandStatus == 0) {
 947                 cmd->scsi_done(cmd);
 948                 cmd_free(h, cp);
 949                 return;
 950         }
 951
 952         /* an error has occurred */
 953         switch (ei->CommandStatus) {
 954
 955         case CMD_TARGET_STATUS:
 956                 if (ei->ScsiStatus) {
 957                         /* Get sense key */
 958                         sense_key = 0xf & ei->SenseInfo[2];
 959                         /* Get additional sense code */
 960                         asc = ei->SenseInfo[12];
 961                         /* Get addition sense code qualifier */
 962                         ascq = ei->SenseInfo[13];
 963                 }
 964
 965                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
 966                         if (check_for_unit_attention(h, cp)) {
 967                                 cmd->result = DID_SOFT_ERROR << 16;
 968                                 break;
 969                         }
 970                         if (sense_key == ILLEGAL_REQUEST) {
 971                                 /*
 972                                  * SCSI REPORT_LUNS is commonly unsupported on
 973                                  * Smart Array.  Suppress noisy complaint.
 974                                  */
 975                                 if (cp->Request.CDB[0] == REPORT_LUNS)
 976                                         break;
 977
 978                                 /* If ASC/ASCQ indicate Logical Unit
 979                                  * Not Supported condition,
 980                                  */
 981                                 if ((asc == 0x25) && (ascq == 0x0)) {
 982                                         dev_warn(&h->pdev->dev, "cp %p "
 983                                                 "has check condition\n", cp);
 984                                         break;
 985                                 }
 986                         }
 987
 988                         if (sense_key == NOT_READY) {
 989                                 /* If Sense is Not Ready, Logical Unit
 990                                  * Not ready, Manual Intervention
 991                                  * required
 992                                  */
 993                                 if ((asc == 0x04) && (ascq == 0x03)) {
 994                                         dev_warn(&h->pdev->dev, "cp %p "
 995                                                 "has check condition: unit "
 996                                                 "not ready, manual "
 997                                                 "intervention required\n", cp);
 998                                         break;
 999                                 }
1000                         }
1001                         if (sense_key == ABORTED_COMMAND) {
1002                                 /* Aborted command is retryable */
1003                                 dev_warn(&h->pdev->dev, "cp %p "
1004                                         "has check condition: aborted command: "
1005                                         "ASC: 0x%x, ASCQ: 0x%x\n",
1006                                         cp, asc, ascq);
1007                                 cmd->result = DID_SOFT_ERROR << 16;
1008                                 break;
1009                         }
1010                         /* Must be some other type of check condition */
1011                         dev_warn(&h->pdev->dev, "cp %p has check condition: "
1012                                         "unknown type: "
1013                                         "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1014                                         "Returning result: 0x%x, "
1015                                         "cmd=[%02x %02x %02x %02x %02x "
1016                                         "%02x %02x %02x %02x %02x %02x "
1017                                         "%02x %02x %02x %02x %02x]\n",
1018                                         cp, sense_key, asc, ascq,
1019                                         cmd->result,
1020                                         cmd->cmnd[0], cmd->cmnd[1],
1021                                         cmd->cmnd[2], cmd->cmnd[3],
1022                                         cmd->cmnd[4], cmd->cmnd[5],
1023                                         cmd->cmnd[6], cmd->cmnd[7],
1024                                         cmd->cmnd[8], cmd->cmnd[9],
1025                                         cmd->cmnd[10], cmd->cmnd[11],
1026                                         cmd->cmnd[12], cmd->cmnd[13],
1027                                         cmd->cmnd[14], cmd->cmnd[15]);
1028                         break;
1029                 }
1030
1031
1032                 /* Problem was not a check condition
1033                  * Pass it up to the upper layers...
1034                  */
1035                 if (ei->ScsiStatus) {
1036                         dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1037                                 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1038                                 "Returning result: 0x%x\n",
1039                                 cp, ei->ScsiStatus,
1040                                 sense_key, asc, ascq,
1041                                 cmd->result);
1042                 } else {  /* scsi status is zero??? How??? */
1043                         dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1044                                 "Returning no connection.\n", cp),
1045
1046                         /* Ordinarily, this case should never happen,
1047                          * but there is a bug in some released firmware
1048                          * revisions that allows it to happen if, for
1049                          * example, a 4100 backplane loses power and
1050                          * the tape drive is in it.  We assume that
1051                          * it's a fatal error of some kind because we
1052                          * can't show that it wasn't. We will make it
1053                          * look like selection timeout since that is
1054                          * the most common reason for this to occur,
1055                          * and it's severe enough.
1056                          */
1057
1058                         cmd->result = DID_NO_CONNECT << 16;
1059                 }
1060                 break;
1061
1062         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1063                 break;
1064         case CMD_DATA_OVERRUN:
1065                 dev_warn(&h->pdev->dev, "cp %p has"
1066                         " completed with data overrun "
1067                         "reported\n", cp);
1068                 break;
1069         case CMD_INVALID: {
1070                 /* print_bytes(cp, sizeof(*cp), 1, 0);
1071                 print_cmd(cp); */
1072                 /* We get CMD_INVALID if you address a non-existent device
1073                  * instead of a selection timeout (no response).  You will
1074                  * see this if you yank out a drive, then try to access it.
1075                  * This is kind of a shame because it means that any other
1076                  * CMD_INVALID (e.g. driver bug) will get interpreted as a
1077                  * missing target. */
1078                 cmd->result = DID_NO_CONNECT << 16;
1079         }
1080                 break;
1081         case CMD_PROTOCOL_ERR:
1082                 dev_warn(&h->pdev->dev, "cp %p has "
1083                         "protocol error \n", cp);
1084                 break;
1085         case CMD_HARDWARE_ERR:
1086                 cmd->result = DID_ERROR << 16;
1087                 dev_warn(&h->pdev->dev, "cp %p had  hardware error\n", cp);
1088                 break;
1089         case CMD_CONNECTION_LOST:
1090                 cmd->result = DID_ERROR << 16;
1091                 dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1092                 break;
1093         case CMD_ABORTED:
1094                 cmd->result = DID_ABORT << 16;
1095                 dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1096                                 cp, ei->ScsiStatus);
1097                 break;
1098         case CMD_ABORT_FAILED:
1099                 cmd->result = DID_ERROR << 16;
1100                 dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1101                 break;
1102         case CMD_UNSOLICITED_ABORT:
1103                 cmd->result = DID_RESET << 16;
1104                 dev_warn(&h->pdev->dev, "cp %p aborted do to an unsolicited "
1105                         "abort\n", cp);
1106                 break;
1107         case CMD_TIMEOUT:
1108                 cmd->result = DID_TIME_OUT << 16;
1109                 dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1110                 break;
1111         default:
1112                 cmd->result = DID_ERROR << 16;
1113                 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1114                                 cp, ei->CommandStatus);
1115         }
1116         cmd->scsi_done(cmd);
1117         cmd_free(h, cp);
1118 }
1119
1120 static int hpsa_scsi_detect(struct ctlr_info *h)
1121 {
1122         struct Scsi_Host *sh;
1123         int error;
1124
1125         sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
1126         if (sh == NULL)
1127                 goto fail;
1128
1129         sh->io_port = 0;
1130         sh->n_io_port = 0;
1131         sh->this_id = -1;
1132         sh->max_channel = 3;
1133         sh->max_cmd_len = MAX_COMMAND_SIZE;
1134         sh->max_lun = HPSA_MAX_LUN;
1135         sh->max_id = HPSA_MAX_LUN;
1136         sh->can_queue = h->nr_cmds;
1137         sh->cmd_per_lun = h->nr_cmds;
1138         sh->sg_tablesize = h->maxsgentries;
1139         h->scsi_host = sh;
1140         sh->hostdata[0] = (unsigned long) h;
1141         sh->irq = h->intr[PERF_MODE_INT];
1142         sh->unique_id = sh->irq;
1143         error = scsi_add_host(sh, &h->pdev->dev);
1144         if (error)
1145                 goto fail_host_put;
1146         scsi_scan_host(sh);
1147         return 0;
1148
1149  fail_host_put:
1150         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_add_host"
1151                 " failed for controller %d\n", h->ctlr);
1152         scsi_host_put(sh);
1153         return error;
1154  fail:
1155         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_host_alloc"
1156                 " failed for controller %d\n", h->ctlr);
1157         return -ENOMEM;
1158 }
1159
1160 static void hpsa_pci_unmap(struct pci_dev *pdev,
1161         struct CommandList *c, int sg_used, int data_direction)
1162 {
1163         int i;
1164         union u64bit addr64;
1165
1166         for (i = 0; i < sg_used; i++) {
1167                 addr64.val32.lower = c->SG[i].Addr.lower;
1168                 addr64.val32.upper = c->SG[i].Addr.upper;
1169                 pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1170                         data_direction);
1171         }
1172 }
1173
1174 static void hpsa_map_one(struct pci_dev *pdev,
1175                 struct CommandList *cp,
1176                 unsigned char *buf,
1177                 size_t buflen,
1178                 int data_direction)
1179 {
1180         u64 addr64;
1181
1182         if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1183                 cp->Header.SGList = 0;
1184                 cp->Header.SGTotal = 0;
1185                 return;
1186         }
1187
1188         addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1189         cp->SG[0].Addr.lower =
1190           (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1191         cp->SG[0].Addr.upper =
1192           (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1193         cp->SG[0].Len = buflen;
1194         cp->Header.SGList = (u8) 1;   /* no. SGs contig in this cmd */
1195         cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1196 }
1197
1198 static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1199         struct CommandList *c)
1200 {
1201         DECLARE_COMPLETION_ONSTACK(wait);
1202
1203         c->waiting = &wait;
1204         enqueue_cmd_and_start_io(h, c);
1205         wait_for_completion(&wait);
1206 }
1207
1208 static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1209         struct CommandList *c, int data_direction)
1210 {
1211         int retry_count = 0;
1212
1213         do {
1214                 memset(c->err_info, 0, sizeof(c->err_info));
1215                 hpsa_scsi_do_simple_cmd_core(h, c);
1216                 retry_count++;
1217         } while (check_for_unit_attention(h, c) && retry_count <= 3);
1218         hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1219 }
1220
1221 static void hpsa_scsi_interpret_error(struct CommandList *cp)
1222 {
1223         struct ErrorInfo *ei;
1224         struct device *d = &cp->h->pdev->dev;
1225
1226         ei = cp->err_info;
1227         switch (ei->CommandStatus) {
1228         case CMD_TARGET_STATUS:
1229                 dev_warn(d, "cmd %p has completed with errors\n", cp);
1230                 dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1231                                 ei->ScsiStatus);
1232                 if (ei->ScsiStatus == 0)
1233                         dev_warn(d, "SCSI status is abnormally zero.  "
1234                         "(probably indicates selection timeout "
1235                         "reported incorrectly due to a known "
1236                         "firmware bug, circa July, 2001.)\n");
1237                 break;
1238         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1239                         dev_info(d, "UNDERRUN\n");
1240                 break;
1241         case CMD_DATA_OVERRUN:
1242                 dev_warn(d, "cp %p has completed with data overrun\n", cp);
1243                 break;
1244         case CMD_INVALID: {
1245                 /* controller unfortunately reports SCSI passthru's
1246                  * to non-existent targets as invalid commands.
1247                  */
1248                 dev_warn(d, "cp %p is reported invalid (probably means "
1249                         "target device no longer present)\n", cp);
1250                 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1251                 print_cmd(cp);  */
1252                 }
1253                 break;
1254         case CMD_PROTOCOL_ERR:
1255                 dev_warn(d, "cp %p has protocol error \n", cp);
1256                 break;
1257         case CMD_HARDWARE_ERR:
1258                 /* cmd->result = DID_ERROR << 16; */
1259                 dev_warn(d, "cp %p had hardware error\n", cp);
1260                 break;
1261         case CMD_CONNECTION_LOST:
1262                 dev_warn(d, "cp %p had connection lost\n", cp);
1263                 break;
1264         case CMD_ABORTED:
1265                 dev_warn(d, "cp %p was aborted\n", cp);
1266                 break;
1267         case CMD_ABORT_FAILED:
1268                 dev_warn(d, "cp %p reports abort failed\n", cp);
1269                 break;
1270         case CMD_UNSOLICITED_ABORT:
1271                 dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1272                 break;
1273         case CMD_TIMEOUT:
1274                 dev_warn(d, "cp %p timed out\n", cp);
1275                 break;
1276         default:
1277                 dev_warn(d, "cp %p returned unknown status %x\n", cp,
1278                                 ei->CommandStatus);
1279         }
1280 }
1281
1282 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1283                         unsigned char page, unsigned char *buf,
1284                         unsigned char bufsize)
1285 {
1286         int rc = IO_OK;
1287         struct CommandList *c;
1288         struct ErrorInfo *ei;
1289
1290         c = cmd_special_alloc(h);
1291
1292         if (c == NULL) {                        /* trouble... */
1293                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1294                 return -ENOMEM;
1295         }
1296
1297         fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD);
1298         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1299         ei = c->err_info;
1300         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1301                 hpsa_scsi_interpret_error(c);
1302                 rc = -1;
1303         }
1304         cmd_special_free(h, c);
1305         return rc;
1306 }
1307
1308 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1309 {
1310         int rc = IO_OK;
1311         struct CommandList *c;
1312         struct ErrorInfo *ei;
1313
1314         c = cmd_special_alloc(h);
1315
1316         if (c == NULL) {                        /* trouble... */
1317                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1318                 return -ENOMEM;
1319         }
1320
1321         fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
1322         hpsa_scsi_do_simple_cmd_core(h, c);
1323         /* no unmap needed here because no data xfer. */
1324
1325         ei = c->err_info;
1326         if (ei->CommandStatus != 0) {
1327                 hpsa_scsi_interpret_error(c);
1328                 rc = -1;
1329         }
1330         cmd_special_free(h, c);
1331         return rc;
1332 }
1333
1334 static void hpsa_get_raid_level(struct ctlr_info *h,
1335         unsigned char *scsi3addr, unsigned char *raid_level)
1336 {
1337         int rc;
1338         unsigned char *buf;
1339
1340         *raid_level = RAID_UNKNOWN;
1341         buf = kzalloc(64, GFP_KERNEL);
1342         if (!buf)
1343                 return;
1344         rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1345         if (rc == 0)
1346                 *raid_level = buf[8];
1347         if (*raid_level > RAID_UNKNOWN)
1348                 *raid_level = RAID_UNKNOWN;
1349         kfree(buf);
1350         return;
1351 }
1352
1353 /* Get the device id from inquiry page 0x83 */
1354 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1355         unsigned char *device_id, int buflen)
1356 {
1357         int rc;
1358         unsigned char *buf;
1359
1360         if (buflen > 16)
1361                 buflen = 16;
1362         buf = kzalloc(64, GFP_KERNEL);
1363         if (!buf)
1364                 return -1;
1365         rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1366         if (rc == 0)
1367                 memcpy(device_id, &buf[8], buflen);
1368         kfree(buf);
1369         return rc != 0;
1370 }
1371
1372 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1373                 struct ReportLUNdata *buf, int bufsize,
1374                 int extended_response)
1375 {
1376         int rc = IO_OK;
1377         struct CommandList *c;
1378         unsigned char scsi3addr[8];
1379         struct ErrorInfo *ei;
1380
1381         c = cmd_special_alloc(h);
1382         if (c == NULL) {                        /* trouble... */
1383                 dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1384                 return -1;
1385         }
1386         /* address the controller */
1387         memset(scsi3addr, 0, sizeof(scsi3addr));
1388         fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1389                 buf, bufsize, 0, scsi3addr, TYPE_CMD);
1390         if (extended_response)
1391                 c->Request.CDB[1] = extended_response;
1392         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1393         ei = c->err_info;
1394         if (ei->CommandStatus != 0 &&
1395             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1396                 hpsa_scsi_interpret_error(c);
1397                 rc = -1;
1398         }
1399         cmd_special_free(h, c);
1400         return rc;
1401 }
1402
1403 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1404                 struct ReportLUNdata *buf,
1405                 int bufsize, int extended_response)
1406 {
1407         return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1408 }
1409
1410 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1411                 struct ReportLUNdata *buf, int bufsize)
1412 {
1413         return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1414 }
1415
1416 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1417         int bus, int target, int lun)
1418 {
1419         device->bus = bus;
1420         device->target = target;
1421         device->lun = lun;
1422 }
1423
1424 static int hpsa_update_device_info(struct ctlr_info *h,
1425         unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device)
1426 {
1427 #define OBDR_TAPE_INQ_SIZE 49
1428         unsigned char *inq_buff;
1429
1430         inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1431         if (!inq_buff)
1432                 goto bail_out;
1433
1434         /* Do an inquiry to the device to see what it is. */
1435         if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1436                 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1437                 /* Inquiry failed (msg printed already) */
1438                 dev_err(&h->pdev->dev,
1439                         "hpsa_update_device_info: inquiry failed\n");
1440                 goto bail_out;
1441         }
1442
1443         this_device->devtype = (inq_buff[0] & 0x1f);
1444         memcpy(this_device->scsi3addr, scsi3addr, 8);
1445         memcpy(this_device->vendor, &inq_buff[8],
1446                 sizeof(this_device->vendor));
1447         memcpy(this_device->model, &inq_buff[16],
1448                 sizeof(this_device->model));
1449         memcpy(this_device->revision, &inq_buff[32],
1450                 sizeof(this_device->revision));
1451         memset(this_device->device_id, 0,
1452                 sizeof(this_device->device_id));
1453         hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1454                 sizeof(this_device->device_id));
1455
1456         if (this_device->devtype == TYPE_DISK &&
1457                 is_logical_dev_addr_mode(scsi3addr))
1458                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1459         else
1460                 this_device->raid_level = RAID_UNKNOWN;
1461
1462         kfree(inq_buff);
1463         return 0;
1464
1465 bail_out:
1466         kfree(inq_buff);
1467         return 1;
1468 }
1469
1470 static unsigned char *msa2xxx_model[] = {
1471         "MSA2012",
1472         "MSA2024",
1473         "MSA2312",
1474         "MSA2324",
1475         NULL,
1476 };
1477
1478 static int is_msa2xxx(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1479 {
1480         int i;
1481
1482         for (i = 0; msa2xxx_model[i]; i++)
1483                 if (strncmp(device->model, msa2xxx_model[i],
1484                         strlen(msa2xxx_model[i])) == 0)
1485                         return 1;
1486         return 0;
1487 }
1488
1489 /* Helper function to assign bus, target, lun mapping of devices.
1490  * Puts non-msa2xxx logical volumes on bus 0, msa2xxx logical
1491  * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1492  * Logical drive target and lun are assigned at this time, but
1493  * physical device lun and target assignment are deferred (assigned
1494  * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1495  */
1496 static void figure_bus_target_lun(struct ctlr_info *h,
1497         u8 *lunaddrbytes, int *bus, int *target, int *lun,
1498         struct hpsa_scsi_dev_t *device)
1499 {
1500         u32 lunid;
1501
1502         if (is_logical_dev_addr_mode(lunaddrbytes)) {
1503                 /* logical device */
1504                 if (unlikely(is_scsi_rev_5(h))) {
1505                         /* p1210m, logical drives lun assignments
1506                          * match SCSI REPORT LUNS data.
1507                          */
1508                         lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1509                         *bus = 0;
1510                         *target = 0;
1511                         *lun = (lunid & 0x3fff) + 1;
1512                 } else {
1513                         /* not p1210m... */
1514                         lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1515                         if (is_msa2xxx(h, device)) {
1516                                 /* msa2xxx way, put logicals on bus 1
1517                                  * and match target/lun numbers box
1518                                  * reports.
1519                                  */
1520                                 *bus = 1;
1521                                 *target = (lunid >> 16) & 0x3fff;
1522                                 *lun = lunid & 0x00ff;
1523                         } else {
1524                                 /* Traditional smart array way. */
1525                                 *bus = 0;
1526                                 *lun = 0;
1527                                 *target = lunid & 0x3fff;
1528                         }
1529                 }
1530         } else {
1531                 /* physical device */
1532                 if (is_hba_lunid(lunaddrbytes))
1533                         if (unlikely(is_scsi_rev_5(h))) {
1534                                 *bus = 0; /* put p1210m ctlr at 0,0,0 */
1535                                 *target = 0;
1536                                 *lun = 0;
1537                                 return;
1538                         } else
1539                                 *bus = 3; /* traditional smartarray */
1540                 else
1541                         *bus = 2; /* physical disk */
1542                 *target = -1;
1543                 *lun = -1; /* we will fill these in later. */
1544         }
1545 }
1546
1547 /*
1548  * If there is no lun 0 on a target, linux won't find any devices.
1549  * For the MSA2xxx boxes, we have to manually detect the enclosure
1550  * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1551  * it for some reason.  *tmpdevice is the target we're adding,
1552  * this_device is a pointer into the current element of currentsd[]
1553  * that we're building up in update_scsi_devices(), below.
1554  * lunzerobits is a bitmap that tracks which targets already have a
1555  * lun 0 assigned.
1556  * Returns 1 if an enclosure was added, 0 if not.
1557  */
1558 static int add_msa2xxx_enclosure_device(struct ctlr_info *h,
1559         struct hpsa_scsi_dev_t *tmpdevice,
1560         struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1561         int bus, int target, int lun, unsigned long lunzerobits[],
1562         int *nmsa2xxx_enclosures)
1563 {
1564         unsigned char scsi3addr[8];
1565
1566         if (test_bit(target, lunzerobits))
1567                 return 0; /* There is already a lun 0 on this target. */
1568
1569         if (!is_logical_dev_addr_mode(lunaddrbytes))
1570                 return 0; /* It's the logical targets that may lack lun 0. */
1571
1572         if (!is_msa2xxx(h, tmpdevice))
1573                 return 0; /* It's only the MSA2xxx that have this problem. */
1574
1575         if (lun == 0) /* if lun is 0, then obviously we have a lun 0. */
1576                 return 0;
1577
1578         if (is_hba_lunid(scsi3addr))
1579                 return 0; /* Don't add the RAID controller here. */
1580
1581         if (is_scsi_rev_5(h))
1582                 return 0; /* p1210m doesn't need to do this. */
1583
1584 #define MAX_MSA2XXX_ENCLOSURES 32
1585         if (*nmsa2xxx_enclosures >= MAX_MSA2XXX_ENCLOSURES) {
1586                 dev_warn(&h->pdev->dev, "Maximum number of MSA2XXX "
1587                         "enclosures exceeded.  Check your hardware "
1588                         "configuration.");
1589                 return 0;
1590         }
1591
1592         memset(scsi3addr, 0, 8);
1593         scsi3addr[3] = target;
1594         if (hpsa_update_device_info(h, scsi3addr, this_device))
1595                 return 0;
1596         (*nmsa2xxx_enclosures)++;
1597         hpsa_set_bus_target_lun(this_device, bus, target, 0);
1598         set_bit(target, lunzerobits);
1599         return 1;
1600 }
1601
1602 /*
1603  * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
1604  * logdev.  The number of luns in physdev and logdev are returned in
1605  * *nphysicals and *nlogicals, respectively.
1606  * Returns 0 on success, -1 otherwise.
1607  */
1608 static int hpsa_gather_lun_info(struct ctlr_info *h,
1609         int reportlunsize,
1610         struct ReportLUNdata *physdev, u32 *nphysicals,
1611         struct ReportLUNdata *logdev, u32 *nlogicals)
1612 {
1613         if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1614                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1615                 return -1;
1616         }
1617         *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1618         if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1619                 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1620                         "  %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1621                         *nphysicals - HPSA_MAX_PHYS_LUN);
1622                 *nphysicals = HPSA_MAX_PHYS_LUN;
1623         }
1624         if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1625                 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1626                 return -1;
1627         }
1628         *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1629         /* Reject Logicals in excess of our max capability. */
1630         if (*nlogicals > HPSA_MAX_LUN) {
1631                 dev_warn(&h->pdev->dev,
1632                         "maximum logical LUNs (%d) exceeded.  "
1633                         "%d LUNs ignored.\n", HPSA_MAX_LUN,
1634                         *nlogicals - HPSA_MAX_LUN);
1635                         *nlogicals = HPSA_MAX_LUN;
1636         }
1637         if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1638                 dev_warn(&h->pdev->dev,
1639                         "maximum logical + physical LUNs (%d) exceeded. "
1640                         "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1641                         *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1642                 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1643         }
1644         return 0;
1645 }
1646
1647 u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
1648         int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
1649         struct ReportLUNdata *logdev_list)
1650 {
1651         /* Helper function, figure out where the LUN ID info is coming from
1652          * given index i, lists of physical and logical devices, where in
1653          * the list the raid controller is supposed to appear (first or last)
1654          */
1655
1656         int logicals_start = nphysicals + (raid_ctlr_position == 0);
1657         int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
1658
1659         if (i == raid_ctlr_position)
1660                 return RAID_CTLR_LUNID;
1661
1662         if (i < logicals_start)
1663                 return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];
1664
1665         if (i < last_device)
1666                 return &logdev_list->LUN[i - nphysicals -
1667                         (raid_ctlr_position == 0)][0];
1668         BUG();
1669         return NULL;
1670 }
1671
1672 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1673 {
1674         /* the idea here is we could get notified
1675          * that some devices have changed, so we do a report
1676          * physical luns and report logical luns cmd, and adjust
1677          * our list of devices accordingly.
1678          *
1679          * The scsi3addr's of devices won't change so long as the
1680          * adapter is not reset.  That means we can rescan and
1681          * tell which devices we already know about, vs. new
1682          * devices, vs.  disappearing devices.
1683          */
1684         struct ReportLUNdata *physdev_list = NULL;
1685         struct ReportLUNdata *logdev_list = NULL;
1686         unsigned char *inq_buff = NULL;
1687         u32 nphysicals = 0;
1688         u32 nlogicals = 0;
1689         u32 ndev_allocated = 0;
1690         struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1691         int ncurrent = 0;
1692         int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1693         int i, nmsa2xxx_enclosures, ndevs_to_allocate;
1694         int bus, target, lun;
1695         int raid_ctlr_position;
1696         DECLARE_BITMAP(lunzerobits, HPSA_MAX_TARGETS_PER_CTLR);
1697
1698         currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_SCSI_DEVS_PER_HBA,
1699                 GFP_KERNEL);
1700         physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1701         logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1702         inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1703         tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1704
1705         if (!currentsd || !physdev_list || !logdev_list ||
1706                 !inq_buff || !tmpdevice) {
1707                 dev_err(&h->pdev->dev, "out of memory\n");
1708                 goto out;
1709         }
1710         memset(lunzerobits, 0, sizeof(lunzerobits));
1711
1712         if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1713                         logdev_list, &nlogicals))
1714                 goto out;
1715
1716         /* We might see up to 32 MSA2xxx enclosures, actually 8 of them
1717          * but each of them 4 times through different paths.  The plus 1
1718          * is for the RAID controller.
1719          */
1720         ndevs_to_allocate = nphysicals + nlogicals + MAX_MSA2XXX_ENCLOSURES + 1;
1721
1722         /* Allocate the per device structures */
1723         for (i = 0; i < ndevs_to_allocate; i++) {
1724                 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1725                 if (!currentsd[i]) {
1726                         dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1727                                 __FILE__, __LINE__);
1728                         goto out;
1729                 }
1730                 ndev_allocated++;
1731         }
1732
1733         if (unlikely(is_scsi_rev_5(h)))
1734                 raid_ctlr_position = 0;
1735         else
1736                 raid_ctlr_position = nphysicals + nlogicals;
1737
1738         /* adjust our table of devices */
1739         nmsa2xxx_enclosures = 0;
1740         for (i = 0; i < nphysicals + nlogicals + 1; i++) {
1741                 u8 *lunaddrbytes;
1742
1743                 /* Figure out where the LUN ID info is coming from */
1744                 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
1745                         i, nphysicals, nlogicals, physdev_list, logdev_list);
1746                 /* skip masked physical devices. */
1747                 if (lunaddrbytes[3] & 0xC0 &&
1748                         i < nphysicals + (raid_ctlr_position == 0))
1749                         continue;
1750
1751                 /* Get device type, vendor, model, device id */
1752                 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice))
1753                         continue; /* skip it if we can't talk to it. */
1754                 figure_bus_target_lun(h, lunaddrbytes, &bus, &target, &lun,
1755                         tmpdevice);
1756                 this_device = currentsd[ncurrent];
1757
1758                 /*
1759                  * For the msa2xxx boxes, we have to insert a LUN 0 which
1760                  * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
1761                  * is nonetheless an enclosure device there.  We have to
1762                  * present that otherwise linux won't find anything if
1763                  * there is no lun 0.
1764                  */
1765                 if (add_msa2xxx_enclosure_device(h, tmpdevice, this_device,
1766                                 lunaddrbytes, bus, target, lun, lunzerobits,
1767                                 &nmsa2xxx_enclosures)) {
1768                         ncurrent++;
1769                         this_device = currentsd[ncurrent];
1770                 }
1771
1772                 *this_device = *tmpdevice;
1773                 hpsa_set_bus_target_lun(this_device, bus, target, lun);
1774
1775                 switch (this_device->devtype) {
1776                 case TYPE_ROM: {
1777                         /* We don't *really* support actual CD-ROM devices,
1778                          * just "One Button Disaster Recovery" tape drive
1779                          * which temporarily pretends to be a CD-ROM drive.
1780                          * So we check that the device is really an OBDR tape
1781                          * device by checking for "$DR-10" in bytes 43-48 of
1782                          * the inquiry data.
1783                          */
1784                                 char obdr_sig[7];
1785 #define OBDR_TAPE_SIG "$DR-10"
1786                                 strncpy(obdr_sig, &inq_buff[43], 6);
1787                                 obdr_sig[6] = '\0';
1788                                 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1789                                         /* Not OBDR device, ignore it. */
1790                                         break;
1791                         }
1792                         ncurrent++;
1793                         break;
1794                 case TYPE_DISK:
1795                         if (i < nphysicals)
1796                                 break;
1797                         ncurrent++;
1798                         break;
1799                 case TYPE_TAPE:
1800                 case TYPE_MEDIUM_CHANGER:
1801                         ncurrent++;
1802                         break;
1803                 case TYPE_RAID:
1804                         /* Only present the Smartarray HBA as a RAID controller.
1805                          * If it's a RAID controller other than the HBA itself
1806                          * (an external RAID controller, MSA500 or similar)
1807                          * don't present it.
1808                          */
1809                         if (!is_hba_lunid(lunaddrbytes))
1810                                 break;
1811                         ncurrent++;
1812                         break;
1813                 default:
1814                         break;
1815                 }
1816                 if (ncurrent >= HPSA_MAX_SCSI_DEVS_PER_HBA)
1817                         break;
1818         }
1819         adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
1820 out:
1821         kfree(tmpdevice);
1822         for (i = 0; i < ndev_allocated; i++)
1823                 kfree(currentsd[i]);
1824         kfree(currentsd);
1825         kfree(inq_buff);
1826         kfree(physdev_list);
1827         kfree(logdev_list);
1828 }
1829
1830 /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1831  * dma mapping  and fills in the scatter gather entries of the
1832  * hpsa command, cp.
1833  */
1834 static int hpsa_scatter_gather(struct ctlr_info *h,
1835                 struct CommandList *cp,
1836                 struct scsi_cmnd *cmd)
1837 {
1838         unsigned int len;
1839         struct scatterlist *sg;
1840         u64 addr64;
1841         int use_sg, i, sg_index, chained;
1842         struct SGDescriptor *curr_sg;
1843
1844         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1845
1846         use_sg = scsi_dma_map(cmd);
1847         if (use_sg < 0)
1848                 return use_sg;
1849
1850         if (!use_sg)
1851                 goto sglist_finished;
1852
1853         curr_sg = cp->SG;
1854         chained = 0;
1855         sg_index = 0;
1856         scsi_for_each_sg(cmd, sg, use_sg, i) {
1857                 if (i == h->max_cmd_sg_entries - 1 &&
1858                         use_sg > h->max_cmd_sg_entries) {
1859                         chained = 1;
1860                         curr_sg = h->cmd_sg_list[cp->cmdindex];
1861                         sg_index = 0;
1862                 }
1863                 addr64 = (u64) sg_dma_address(sg);
1864                 len  = sg_dma_len(sg);
1865                 curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
1866                 curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
1867                 curr_sg->Len = len;
1868                 curr_sg->Ext = 0;  /* we are not chaining */
1869                 curr_sg++;
1870         }
1871
1872         if (use_sg + chained > h->maxSG)
1873                 h->maxSG = use_sg + chained;
1874
1875         if (chained) {
1876                 cp->Header.SGList = h->max_cmd_sg_entries;
1877                 cp->Header.SGTotal = (u16) (use_sg + 1);
1878                 hpsa_map_sg_chain_block(h, cp);
1879                 return 0;
1880         }
1881
1882 sglist_finished:
1883
1884         cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
1885         cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
1886         return 0;
1887 }
1888
1889
1890 static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
1891         void (*done)(struct scsi_cmnd *))
1892 {
1893         struct ctlr_info *h;
1894         struct hpsa_scsi_dev_t *dev;
1895         unsigned char scsi3addr[8];
1896         struct CommandList *c;
1897         unsigned long flags;
1898
1899         /* Get the ptr to our adapter structure out of cmd->host. */
1900         h = sdev_to_hba(cmd->device);
1901         dev = cmd->device->hostdata;
1902         if (!dev) {
1903                 cmd->result = DID_NO_CONNECT << 16;
1904                 done(cmd);
1905                 return 0;
1906         }
1907         memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
1908
1909         /* Need a lock as this is being allocated from the pool */
1910         spin_lock_irqsave(&h->lock, flags);
1911         c = cmd_alloc(h);
1912         spin_unlock_irqrestore(&h->lock, flags);
1913         if (c == NULL) {                        /* trouble... */
1914                 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
1915                 return SCSI_MLQUEUE_HOST_BUSY;
1916         }
1917
1918         /* Fill in the command list header */
1919
1920         cmd->scsi_done = done;    /* save this for use by completion code */
1921
1922         /* save c in case we have to abort it  */
1923         cmd->host_scribble = (unsigned char *) c;
1924
1925         c->cmd_type = CMD_SCSI;
1926         c->scsi_cmd = cmd;
1927         c->Header.ReplyQueue = 0;  /* unused in simple mode */
1928         memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1929         c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
1930         c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
1931
1932         /* Fill in the request block... */
1933
1934         c->Request.Timeout = 0;
1935         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
1936         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
1937         c->Request.CDBLen = cmd->cmd_len;
1938         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
1939         c->Request.Type.Type = TYPE_CMD;
1940         c->Request.Type.Attribute = ATTR_SIMPLE;
1941         switch (cmd->sc_data_direction) {
1942         case DMA_TO_DEVICE:
1943                 c->Request.Type.Direction = XFER_WRITE;
1944                 break;
1945         case DMA_FROM_DEVICE:
1946                 c->Request.Type.Direction = XFER_READ;
1947                 break;
1948         case DMA_NONE:
1949                 c->Request.Type.Direction = XFER_NONE;
1950                 break;
1951         case DMA_BIDIRECTIONAL:
1952                 /* This can happen if a buggy application does a scsi passthru
1953                  * and sets both inlen and outlen to non-zero. ( see
1954                  * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1955                  */
1956
1957                 c->Request.Type.Direction = XFER_RSVD;
1958                 /* This is technically wrong, and hpsa controllers should
1959                  * reject it with CMD_INVALID, which is the most correct
1960                  * response, but non-fibre backends appear to let it
1961                  * slide by, and give the same results as if this field
1962                  * were set correctly.  Either way is acceptable for
1963                  * our purposes here.
1964                  */
1965
1966                 break;
1967
1968         default:
1969                 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
1970                         cmd->sc_data_direction);
1971                 BUG();
1972                 break;
1973         }
1974
1975         if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
1976                 cmd_free(h, c);
1977                 return SCSI_MLQUEUE_HOST_BUSY;
1978         }
1979         enqueue_cmd_and_start_io(h, c);
1980         /* the cmd'll come back via intr handler in complete_scsi_command()  */
1981         return 0;
1982 }
1983
1984 static void hpsa_scan_start(struct Scsi_Host *sh)
1985 {
1986         struct ctlr_info *h = shost_to_hba(sh);
1987         unsigned long flags;
1988
1989         /* wait until any scan already in progress is finished. */
1990         while (1) {
1991                 spin_lock_irqsave(&h->scan_lock, flags);
1992                 if (h->scan_finished)
1993                         break;
1994                 spin_unlock_irqrestore(&h->scan_lock, flags);
1995                 wait_event(h->scan_wait_queue, h->scan_finished);
1996                 /* Note: We don't need to worry about a race between this
1997                  * thread and driver unload because the midlayer will
1998                  * have incremented the reference count, so unload won't
1999                  * happen if we're in here.
2000                  */
2001         }
2002         h->scan_finished = 0; /* mark scan as in progress */
2003         spin_unlock_irqrestore(&h->scan_lock, flags);
2004
2005         hpsa_update_scsi_devices(h, h->scsi_host->host_no);
2006
2007         spin_lock_irqsave(&h->scan_lock, flags);
2008         h->scan_finished = 1; /* mark scan as finished. */
2009         wake_up_all(&h->scan_wait_queue);
2010         spin_unlock_irqrestore(&h->scan_lock, flags);
2011 }
2012
2013 static int hpsa_scan_finished(struct Scsi_Host *sh,
2014         unsigned long elapsed_time)
2015 {
2016         struct ctlr_info *h = shost_to_hba(sh);
2017         unsigned long flags;
2018         int finished;
2019
2020         spin_lock_irqsave(&h->scan_lock, flags);
2021         finished = h->scan_finished;
2022         spin_unlock_irqrestore(&h->scan_lock, flags);
2023         return finished;
2024 }
2025
2026 static int hpsa_change_queue_depth(struct scsi_device *sdev,
2027         int qdepth, int reason)
2028 {
2029         struct ctlr_info *h = sdev_to_hba(sdev);
2030
2031         if (reason != SCSI_QDEPTH_DEFAULT)
2032                 return -ENOTSUPP;
2033
2034         if (qdepth < 1)
2035                 qdepth = 1;
2036         else
2037                 if (qdepth > h->nr_cmds)
2038                         qdepth = h->nr_cmds;
2039         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
2040         return sdev->queue_depth;
2041 }
2042
2043 static void hpsa_unregister_scsi(struct ctlr_info *h)
2044 {
2045         /* we are being forcibly unloaded, and may not refuse. */
2046         scsi_remove_host(h->scsi_host);
2047         scsi_host_put(h->scsi_host);
2048         h->scsi_host = NULL;
2049 }
2050
2051 static int hpsa_register_scsi(struct ctlr_info *h)
2052 {
2053         int rc;
2054
2055         rc = hpsa_scsi_detect(h);
2056         if (rc != 0)
2057                 dev_err(&h->pdev->dev, "hpsa_register_scsi: failed"
2058                         " hpsa_scsi_detect(), rc is %d\n", rc);
2059         return rc;
2060 }
2061
2062 static int wait_for_device_to_become_ready(struct ctlr_info *h,
2063         unsigned char lunaddr[])
2064 {
2065         int rc = 0;
2066         int count = 0;
2067         int waittime = 1; /* seconds */
2068         struct CommandList *c;
2069
2070         c = cmd_special_alloc(h);
2071         if (!c) {
2072                 dev_warn(&h->pdev->dev, "out of memory in "
2073                         "wait_for_device_to_become_ready.\n");
2074                 return IO_ERROR;
2075         }
2076
2077         /* Send test unit ready until device ready, or give up. */
2078         while (count < HPSA_TUR_RETRY_LIMIT) {
2079
2080                 /* Wait for a bit.  do this first, because if we send
2081                  * the TUR right away, the reset will just abort it.
2082                  */
2083                 msleep(1000 * waittime);
2084                 count++;
2085
2086                 /* Increase wait time with each try, up to a point. */
2087                 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
2088                         waittime = waittime * 2;
2089
2090                 /* Send the Test Unit Ready */
2091                 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD);
2092                 hpsa_scsi_do_simple_cmd_core(h, c);
2093                 /* no unmap needed here because no data xfer. */
2094
2095                 if (c->err_info->CommandStatus == CMD_SUCCESS)
2096                         break;
2097
2098                 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2099                         c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
2100                         (c->err_info->SenseInfo[2] == NO_SENSE ||
2101                         c->err_info->SenseInfo[2] == UNIT_ATTENTION))
2102                         break;
2103
2104                 dev_warn(&h->pdev->dev, "waiting %d secs "
2105                         "for device to become ready.\n", waittime);
2106                 rc = 1; /* device not ready. */
2107         }
2108
2109         if (rc)
2110                 dev_warn(&h->pdev->dev, "giving up on device.\n");
2111         else
2112                 dev_warn(&h->pdev->dev, "device is ready.\n");
2113
2114         cmd_special_free(h, c);
2115         return rc;
2116 }
2117
2118 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
2119  * complaining.  Doing a host- or bus-reset can't do anything good here.
2120  */
2121 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
2122 {
2123         int rc;
2124         struct ctlr_info *h;
2125         struct hpsa_scsi_dev_t *dev;
2126
2127         /* find the controller to which the command to be aborted was sent */
2128         h = sdev_to_hba(scsicmd->device);
2129         if (h == NULL) /* paranoia */
2130                 return FAILED;
2131         dev = scsicmd->device->hostdata;
2132         if (!dev) {
2133                 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2134                         "device lookup failed.\n");
2135                 return FAILED;
2136         }
2137         dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
2138                 h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2139         /* send a reset to the SCSI LUN which the command was sent to */
2140         rc = hpsa_send_reset(h, dev->scsi3addr);
2141         if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2142                 return SUCCESS;
2143
2144         dev_warn(&h->pdev->dev, "resetting device failed.\n");
2145         return FAILED;
2146 }
2147
2148 /*
2149  * For operations that cannot sleep, a command block is allocated at init,
2150  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2151  * which ones are free or in use.  Lock must be held when calling this.
2152  * cmd_free() is the complement.
2153  */
2154 static struct CommandList *cmd_alloc(struct ctlr_info *h)
2155 {
2156         struct CommandList *c;
2157         int i;
2158         union u64bit temp64;
2159         dma_addr_t cmd_dma_handle, err_dma_handle;
2160
2161         do {
2162                 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2163                 if (i == h->nr_cmds)
2164                         return NULL;
2165         } while (test_and_set_bit
2166                  (i & (BITS_PER_LONG - 1),
2167                   h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2168         c = h->cmd_pool + i;
2169         memset(c, 0, sizeof(*c));
2170         cmd_dma_handle = h->cmd_pool_dhandle
2171             + i * sizeof(*c);
2172         c->err_info = h->errinfo_pool + i;
2173         memset(c->err_info, 0, sizeof(*c->err_info));
2174         err_dma_handle = h->errinfo_pool_dhandle
2175             + i * sizeof(*c->err_info);
2176         h->nr_allocs++;
2177
2178         c->cmdindex = i;
2179
2180         INIT_HLIST_NODE(&c->list);
2181         c->busaddr = (u32) cmd_dma_handle;
2182         temp64.val = (u64) err_dma_handle;
2183         c->ErrDesc.Addr.lower = temp64.val32.lower;
2184         c->ErrDesc.Addr.upper = temp64.val32.upper;
2185         c->ErrDesc.Len = sizeof(*c->err_info);
2186
2187         c->h = h;
2188         return c;
2189 }
2190
2191 /* For operations that can wait for kmalloc to possibly sleep,
2192  * this routine can be called. Lock need not be held to call
2193  * cmd_special_alloc. cmd_special_free() is the complement.
2194  */
2195 static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2196 {
2197         struct CommandList *c;
2198         union u64bit temp64;
2199         dma_addr_t cmd_dma_handle, err_dma_handle;
2200
2201         c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2202         if (c == NULL)
2203                 return NULL;
2204         memset(c, 0, sizeof(*c));
2205
2206         c->cmdindex = -1;
2207
2208         c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2209                     &err_dma_handle);
2210
2211         if (c->err_info == NULL) {
2212                 pci_free_consistent(h->pdev,
2213                         sizeof(*c), c, cmd_dma_handle);
2214                 return NULL;
2215         }
2216         memset(c->err_info, 0, sizeof(*c->err_info));
2217
2218         INIT_HLIST_NODE(&c->list);
2219         c->busaddr = (u32) cmd_dma_handle;
2220         temp64.val = (u64) err_dma_handle;
2221         c->ErrDesc.Addr.lower = temp64.val32.lower;
2222         c->ErrDesc.Addr.upper = temp64.val32.upper;
2223         c->ErrDesc.Len = sizeof(*c->err_info);
2224
2225         c->h = h;
2226         return c;
2227 }
2228
2229 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2230 {
2231         int i;
2232
2233         i = c - h->cmd_pool;
2234         clear_bit(i & (BITS_PER_LONG - 1),
2235                   h->cmd_pool_bits + (i / BITS_PER_LONG));
2236         h->nr_frees++;
2237 }
2238
2239 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2240 {
2241         union u64bit temp64;
2242
2243         temp64.val32.lower = c->ErrDesc.Addr.lower;
2244         temp64.val32.upper = c->ErrDesc.Addr.upper;
2245         pci_free_consistent(h->pdev, sizeof(*c->err_info),
2246                             c->err_info, (dma_addr_t) temp64.val);
2247         pci_free_consistent(h->pdev, sizeof(*c),
2248                             c, (dma_addr_t) c->busaddr);
2249 }
2250
2251 #ifdef CONFIG_COMPAT
2252
2253 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2254 {
2255         IOCTL32_Command_struct __user *arg32 =
2256             (IOCTL32_Command_struct __user *) arg;
2257         IOCTL_Command_struct arg64;
2258         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2259         int err;
2260         u32 cp;
2261
2262         err = 0;
2263         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2264                            sizeof(arg64.LUN_info));
2265         err |= copy_from_user(&arg64.Request, &arg32->Request,
2266                            sizeof(arg64.Request));
2267         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2268                            sizeof(arg64.error_info));
2269         err |= get_user(arg64.buf_size, &arg32->buf_size);
2270         err |= get_user(cp, &arg32->buf);
2271         arg64.buf = compat_ptr(cp);
2272         err |= copy_to_user(p, &arg64, sizeof(arg64));
2273
2274         if (err)
2275                 return -EFAULT;
2276
2277         err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2278         if (err)
2279                 return err;
2280         err |= copy_in_user(&arg32->error_info, &p->error_info,
2281                          sizeof(arg32->error_info));
2282         if (err)
2283                 return -EFAULT;
2284         return err;
2285 }
2286
2287 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2288         int cmd, void *arg)
2289 {
2290         BIG_IOCTL32_Command_struct __user *arg32 =
2291             (BIG_IOCTL32_Command_struct __user *) arg;
2292         BIG_IOCTL_Command_struct arg64;
2293         BIG_IOCTL_Command_struct __user *p =
2294             compat_alloc_user_space(sizeof(arg64));
2295         int err;
2296         u32 cp;
2297
2298         err = 0;
2299         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2300                            sizeof(arg64.LUN_info));
2301         err |= copy_from_user(&arg64.Request, &arg32->Request,
2302                            sizeof(arg64.Request));
2303         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2304                            sizeof(arg64.error_info));
2305         err |= get_user(arg64.buf_size, &arg32->buf_size);
2306         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2307         err |= get_user(cp, &arg32->buf);
2308         arg64.buf = compat_ptr(cp);
2309         err |= copy_to_user(p, &arg64, sizeof(arg64));
2310
2311         if (err)
2312                 return -EFAULT;
2313
2314         err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2315         if (err)
2316                 return err;
2317         err |= copy_in_user(&arg32->error_info, &p->error_info,
2318                          sizeof(arg32->error_info));
2319         if (err)
2320                 return -EFAULT;
2321         return err;
2322 }
2323
2324 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2325 {
2326         switch (cmd) {
2327         case CCISS_GETPCIINFO:
2328         case CCISS_GETINTINFO:
2329         case CCISS_SETINTINFO:
2330         case CCISS_GETNODENAME:
2331         case CCISS_SETNODENAME:
2332         case CCISS_GETHEARTBEAT:
2333         case CCISS_GETBUSTYPES:
2334         case CCISS_GETFIRMVER:
2335         case CCISS_GETDRIVVER:
2336         case CCISS_REVALIDVOLS:
2337         case CCISS_DEREGDISK:
2338         case CCISS_REGNEWDISK:
2339         case CCISS_REGNEWD:
2340         case CCISS_RESCANDISK:
2341         case CCISS_GETLUNINFO:
2342                 return hpsa_ioctl(dev, cmd, arg);
2343
2344         case CCISS_PASSTHRU32:
2345                 return hpsa_ioctl32_passthru(dev, cmd, arg);
2346         case CCISS_BIG_PASSTHRU32:
2347                 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2348
2349         default:
2350                 return -ENOIOCTLCMD;
2351         }
2352 }
2353 #endif
2354
2355 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2356 {
2357         struct hpsa_pci_info pciinfo;
2358
2359         if (!argp)
2360                 return -EINVAL;
2361         pciinfo.domain = pci_domain_nr(h->pdev->bus);
2362         pciinfo.bus = h->pdev->bus->number;
2363         pciinfo.dev_fn = h->pdev->devfn;
2364         pciinfo.board_id = h->board_id;
2365         if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2366                 return -EFAULT;
2367         return 0;
2368 }
2369
2370 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2371 {
2372         DriverVer_type DriverVer;
2373         unsigned char vmaj, vmin, vsubmin;
2374         int rc;
2375
2376         rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2377                 &vmaj, &vmin, &vsubmin);
2378         if (rc != 3) {
2379                 dev_info(&h->pdev->dev, "driver version string '%s' "
2380                         "unrecognized.", HPSA_DRIVER_VERSION);
2381                 vmaj = 0;
2382                 vmin = 0;
2383                 vsubmin = 0;
2384         }
2385         DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2386         if (!argp)
2387                 return -EINVAL;
2388         if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2389                 return -EFAULT;
2390         return 0;
2391 }
2392
2393 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2394 {
2395         IOCTL_Command_struct iocommand;
2396         struct CommandList *c;
2397         char *buff = NULL;
2398         union u64bit temp64;
2399
2400         if (!argp)
2401                 return -EINVAL;
2402         if (!capable(CAP_SYS_RAWIO))
2403                 return -EPERM;
2404         if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2405                 return -EFAULT;
2406         if ((iocommand.buf_size < 1) &&
2407             (iocommand.Request.Type.Direction != XFER_NONE)) {
2408                 return -EINVAL;
2409         }
2410         if (iocommand.buf_size > 0) {
2411                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2412                 if (buff == NULL)
2413                         return -EFAULT;
2414         }
2415         if (iocommand.Request.Type.Direction == XFER_WRITE) {
2416                 /* Copy the data into the buffer we created */
2417                 if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) {
2418                         kfree(buff);
2419                         return -EFAULT;
2420                 }
2421         } else
2422                 memset(buff, 0, iocommand.buf_size);
2423         c = cmd_special_alloc(h);
2424         if (c == NULL) {
2425                 kfree(buff);
2426                 return -ENOMEM;
2427         }
2428         /* Fill in the command type */
2429         c->cmd_type = CMD_IOCTL_PEND;
2430         /* Fill in Command Header */
2431         c->Header.ReplyQueue = 0; /* unused in simple mode */
2432         if (iocommand.buf_size > 0) {   /* buffer to fill */
2433                 c->Header.SGList = 1;
2434                 c->Header.SGTotal = 1;
2435         } else  { /* no buffers to fill */
2436                 c->Header.SGList = 0;
2437                 c->Header.SGTotal = 0;
2438         }
2439         memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
2440         /* use the kernel address the cmd block for tag */
2441         c->Header.Tag.lower = c->busaddr;
2442
2443         /* Fill in Request block */
2444         memcpy(&c->Request, &iocommand.Request,
2445                 sizeof(c->Request));
2446
2447         /* Fill in the scatter gather information */
2448         if (iocommand.buf_size > 0) {
2449                 temp64.val = pci_map_single(h->pdev, buff,
2450                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
2451                 c->SG[0].Addr.lower = temp64.val32.lower;
2452                 c->SG[0].Addr.upper = temp64.val32.upper;
2453                 c->SG[0].Len = iocommand.buf_size;
2454                 c->SG[0].Ext = 0; /* we are not chaining*/
2455         }
2456         hpsa_scsi_do_simple_cmd_core(h, c);
2457         hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
2458         check_ioctl_unit_attention(h, c);
2459
2460         /* Copy the error information out */
2461         memcpy(&iocommand.error_info, c->err_info,
2462                 sizeof(iocommand.error_info));
2463         if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
2464                 kfree(buff);
2465                 cmd_special_free(h, c);
2466                 return -EFAULT;
2467         }
2468
2469         if (iocommand.Request.Type.Direction == XFER_READ) {
2470                 /* Copy the data out of the buffer we created */
2471                 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
2472                         kfree(buff);
2473                         cmd_special_free(h, c);
2474                         return -EFAULT;
2475                 }
2476         }
2477         kfree(buff);
2478         cmd_special_free(h, c);
2479         return 0;
2480 }
2481
2482 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2483 {
2484         BIG_IOCTL_Command_struct *ioc;
2485         struct CommandList *c;
2486         unsigned char **buff = NULL;
2487         int *buff_size = NULL;
2488         union u64bit temp64;
2489         BYTE sg_used = 0;
2490         int status = 0;
2491         int i;
2492         u32 left;
2493         u32 sz;
2494         BYTE __user *data_ptr;
2495
2496         if (!argp)
2497                 return -EINVAL;
2498         if (!capable(CAP_SYS_RAWIO))
2499                 return -EPERM;
2500         ioc = (BIG_IOCTL_Command_struct *)
2501             kmalloc(sizeof(*ioc), GFP_KERNEL);
2502         if (!ioc) {
2503                 status = -ENOMEM;
2504                 goto cleanup1;
2505         }
2506         if (copy_from_user(ioc, argp, sizeof(*ioc))) {
2507                 status = -EFAULT;
2508                 goto cleanup1;
2509         }
2510         if ((ioc->buf_size < 1) &&
2511             (ioc->Request.Type.Direction != XFER_NONE)) {
2512                 status = -EINVAL;
2513                 goto cleanup1;
2514         }
2515         /* Check kmalloc limits  using all SGs */
2516         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
2517                 status = -EINVAL;
2518                 goto cleanup1;
2519         }
2520         if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
2521                 status = -EINVAL;
2522                 goto cleanup1;
2523         }
2524         buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
2525         if (!buff) {
2526                 status = -ENOMEM;
2527                 goto cleanup1;
2528         }
2529         buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
2530         if (!buff_size) {
2531                 status = -ENOMEM;
2532                 goto cleanup1;
2533         }
2534         left = ioc->buf_size;
2535         data_ptr = ioc->buf;
2536         while (left) {
2537                 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
2538                 buff_size[sg_used] = sz;
2539                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
2540                 if (buff[sg_used] == NULL) {
2541                         status = -ENOMEM;
2542                         goto cleanup1;
2543                 }
2544                 if (ioc->Request.Type.Direction == XFER_WRITE) {
2545                         if (copy_from_user(buff[sg_used], data_ptr, sz)) {
2546                                 status = -ENOMEM;
2547                                 goto cleanup1;
2548                         }
2549                 } else
2550                         memset(buff[sg_used], 0, sz);
2551                 left -= sz;
2552                 data_ptr += sz;
2553                 sg_used++;
2554         }
2555         c = cmd_special_alloc(h);
2556         if (c == NULL) {
2557                 status = -ENOMEM;
2558                 goto cleanup1;
2559         }
2560         c->cmd_type = CMD_IOCTL_PEND;
2561         c->Header.ReplyQueue = 0;
2562
2563         if (ioc->buf_size > 0) {
2564                 c->Header.SGList = sg_used;
2565                 c->Header.SGTotal = sg_used;
2566         } else {
2567                 c->Header.SGList = 0;
2568                 c->Header.SGTotal = 0;
2569         }
2570         memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
2571         c->Header.Tag.lower = c->busaddr;
2572         memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
2573         if (ioc->buf_size > 0) {
2574                 int i;
2575                 for (i = 0; i < sg_used; i++) {
2576                         temp64.val = pci_map_single(h->pdev, buff[i],
2577                                     buff_size[i], PCI_DMA_BIDIRECTIONAL);
2578                         c->SG[i].Addr.lower = temp64.val32.lower;
2579                         c->SG[i].Addr.upper = temp64.val32.upper;
2580                         c->SG[i].Len = buff_size[i];
2581                         /* we are not chaining */
2582                         c->SG[i].Ext = 0;
2583                 }
2584         }
2585         hpsa_scsi_do_simple_cmd_core(h, c);
2586         hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
2587         check_ioctl_unit_attention(h, c);
2588         /* Copy the error information out */
2589         memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
2590         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
2591                 cmd_special_free(h, c);
2592                 status = -EFAULT;
2593                 goto cleanup1;
2594         }
2595         if (ioc->Request.Type.Direction == XFER_READ) {
2596                 /* Copy the data out of the buffer we created */
2597                 BYTE __user *ptr = ioc->buf;
2598                 for (i = 0; i < sg_used; i++) {
2599                         if (copy_to_user(ptr, buff[i], buff_size[i])) {
2600                                 cmd_special_free(h, c);
2601                                 status = -EFAULT;
2602                                 goto cleanup1;
2603                         }
2604                         ptr += buff_size[i];
2605                 }
2606         }
2607         cmd_special_free(h, c);
2608         status = 0;
2609 cleanup1:
2610         if (buff) {
2611                 for (i = 0; i < sg_used; i++)
2612                         kfree(buff[i]);
2613                 kfree(buff);
2614         }
2615         kfree(buff_size);
2616         kfree(ioc);
2617         return status;
2618 }
2619
2620 static void check_ioctl_unit_attention(struct ctlr_info *h,
2621         struct CommandList *c)
2622 {
2623         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2624                         c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
2625                 (void) check_for_unit_attention(h, c);
2626 }
2627 /*
2628  * ioctl
2629  */
2630 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
2631 {
2632         struct ctlr_info *h;
2633         void __user *argp = (void __user *)arg;
2634
2635         h = sdev_to_hba(dev);
2636
2637         switch (cmd) {
2638         case CCISS_DEREGDISK:
2639         case CCISS_REGNEWDISK:
2640         case CCISS_REGNEWD:
2641                 hpsa_scan_start(h->scsi_host);
2642                 return 0;
2643         case CCISS_GETPCIINFO:
2644                 return hpsa_getpciinfo_ioctl(h, argp);
2645         case CCISS_GETDRIVVER:
2646                 return hpsa_getdrivver_ioctl(h, argp);
2647         case CCISS_PASSTHRU:
2648                 return hpsa_passthru_ioctl(h, argp);
2649         case CCISS_BIG_PASSTHRU:
2650                 return hpsa_big_passthru_ioctl(h, argp);
2651         default:
2652                 return -ENOTTY;
2653         }
2654 }
2655
2656 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
2657         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
2658         int cmd_type)
2659 {
2660         int pci_dir = XFER_NONE;
2661
2662         c->cmd_type = CMD_IOCTL_PEND;
2663         c->Header.ReplyQueue = 0;
2664         if (buff != NULL && size > 0) {
2665                 c->Header.SGList = 1;
2666                 c->Header.SGTotal = 1;
2667         } else {
2668                 c->Header.SGList = 0;
2669                 c->Header.SGTotal = 0;
2670         }
2671         c->Header.Tag.lower = c->busaddr;
2672         memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2673
2674         c->Request.Type.Type = cmd_type;
2675         if (cmd_type == TYPE_CMD) {
2676                 switch (cmd) {
2677                 case HPSA_INQUIRY:
2678                         /* are we trying to read a vital product page */
2679                         if (page_code != 0) {
2680                                 c->Request.CDB[1] = 0x01;
2681                                 c->Request.CDB[2] = page_code;
2682                         }
2683                         c->Request.CDBLen = 6;
2684                         c->Request.Type.Attribute = ATTR_SIMPLE;
2685                         c->Request.Type.Direction = XFER_READ;
2686                         c->Request.Timeout = 0;
2687                         c->Request.CDB[0] = HPSA_INQUIRY;
2688                         c->Request.CDB[4] = size & 0xFF;
2689                         break;
2690                 case HPSA_REPORT_LOG:
2691                 case HPSA_REPORT_PHYS:
2692                         /* Talking to controller so It's a physical command
2693                            mode = 00 target = 0.  Nothing to write.
2694                          */
2695                         c->Request.CDBLen = 12;
2696                         c->Request.Type.Attribute = ATTR_SIMPLE;
2697                         c->Request.Type.Direction = XFER_READ;
2698                         c->Request.Timeout = 0;
2699                         c->Request.CDB[0] = cmd;
2700                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2701                         c->Request.CDB[7] = (size >> 16) & 0xFF;
2702                         c->Request.CDB[8] = (size >> 8) & 0xFF;
2703                         c->Request.CDB[9] = size & 0xFF;
2704                         break;
2705                 case HPSA_CACHE_FLUSH:
2706                         c->Request.CDBLen = 12;
2707                         c->Request.Type.Attribute = ATTR_SIMPLE;
2708                         c->Request.Type.Direction = XFER_WRITE;
2709                         c->Request.Timeout = 0;
2710                         c->Request.CDB[0] = BMIC_WRITE;
2711                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2712                         break;
2713                 case TEST_UNIT_READY:
2714                         c->Request.CDBLen = 6;
2715                         c->Request.Type.Attribute = ATTR_SIMPLE;
2716                         c->Request.Type.Direction = XFER_NONE;
2717                         c->Request.Timeout = 0;
2718                         break;
2719                 default:
2720                         dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
2721                         BUG();
2722                         return;
2723                 }
2724         } else if (cmd_type == TYPE_MSG) {
2725                 switch (cmd) {
2726
2727                 case  HPSA_DEVICE_RESET_MSG:
2728                         c->Request.CDBLen = 16;
2729                         c->Request.Type.Type =  1; /* It is a MSG not a CMD */
2730                         c->Request.Type.Attribute = ATTR_SIMPLE;
2731                         c->Request.Type.Direction = XFER_NONE;
2732                         c->Request.Timeout = 0; /* Don't time out */
2733                         c->Request.CDB[0] =  0x01; /* RESET_MSG is 0x01 */
2734                         c->Request.CDB[1] = 0x03;  /* Reset target above */
2735                         /* If bytes 4-7 are zero, it means reset the */
2736                         /* LunID device */
2737                         c->Request.CDB[4] = 0x00;
2738                         c->Request.CDB[5] = 0x00;
2739                         c->Request.CDB[6] = 0x00;
2740                         c->Request.CDB[7] = 0x00;
2741                 break;
2742
2743                 default:
2744                         dev_warn(&h->pdev->dev, "unknown message type %d\n",
2745                                 cmd);
2746                         BUG();
2747                 }
2748         } else {
2749                 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
2750                 BUG();
2751         }
2752
2753         switch (c->Request.Type.Direction) {
2754         case XFER_READ:
2755                 pci_dir = PCI_DMA_FROMDEVICE;
2756                 break;
2757         case XFER_WRITE:
2758                 pci_dir = PCI_DMA_TODEVICE;
2759                 break;
2760         case XFER_NONE:
2761                 pci_dir = PCI_DMA_NONE;
2762                 break;
2763         default:
2764                 pci_dir = PCI_DMA_BIDIRECTIONAL;
2765         }
2766
2767         hpsa_map_one(h->pdev, c, buff, size, pci_dir);
2768
2769         return;
2770 }
2771
2772 /*
2773  * Map (physical) PCI mem into (virtual) kernel space
2774  */
2775 static void __iomem *remap_pci_mem(ulong base, ulong size)
2776 {
2777         ulong page_base = ((ulong) base) & PAGE_MASK;
2778         ulong page_offs = ((ulong) base) - page_base;
2779         void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2780
2781         return page_remapped ? (page_remapped + page_offs) : NULL;
2782 }
2783
2784 /* Takes cmds off the submission queue and sends them to the hardware,
2785  * then puts them on the queue of cmds waiting for completion.
2786  */
2787 static void start_io(struct ctlr_info *h)
2788 {
2789         struct CommandList *c;
2790
2791         while (!hlist_empty(&h->reqQ)) {
2792                 c = hlist_entry(h->reqQ.first, struct CommandList, list);
2793                 /* can't do anything if fifo is full */
2794                 if ((h->access.fifo_full(h))) {
2795                         dev_warn(&h->pdev->dev, "fifo full\n");
2796                         break;
2797                 }
2798
2799                 /* Get the first entry from the Request Q */
2800                 removeQ(c);
2801                 h->Qdepth--;
2802
2803                 /* Tell the controller execute command */
2804                 h->access.submit_command(h, c);
2805
2806                 /* Put job onto the completed Q */
2807                 addQ(&h->cmpQ, c);
2808         }
2809 }
2810
2811 static inline unsigned long get_next_completion(struct ctlr_info *h)
2812 {
2813         return h->access.command_completed(h);
2814 }
2815
2816 static inline bool interrupt_pending(struct ctlr_info *h)
2817 {
2818         return h->access.intr_pending(h);
2819 }
2820
2821 static inline long interrupt_not_for_us(struct ctlr_info *h)
2822 {
2823         return !(h->msi_vector || h->msix_vector) &&
2824                 ((h->access.intr_pending(h) == 0) ||
2825                 (h->interrupts_enabled == 0));
2826 }
2827
2828 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
2829         u32 raw_tag)
2830 {
2831         if (unlikely(tag_index >= h->nr_cmds)) {
2832                 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
2833                 return 1;
2834         }
2835         return 0;
2836 }
2837
2838 static inline void finish_cmd(struct CommandList *c, u32 raw_tag)
2839 {
2840         removeQ(c);
2841         if (likely(c->cmd_type == CMD_SCSI))
2842                 complete_scsi_command(c, 0, raw_tag);
2843         else if (c->cmd_type == CMD_IOCTL_PEND)
2844                 complete(c->waiting);
2845 }
2846
2847 static inline u32 hpsa_tag_contains_index(u32 tag)
2848 {
2849 #define DIRECT_LOOKUP_BIT 0x10
2850         return tag & DIRECT_LOOKUP_BIT;
2851 }
2852
2853 static inline u32 hpsa_tag_to_index(u32 tag)
2854 {
2855 #define DIRECT_LOOKUP_SHIFT 5
2856         return tag >> DIRECT_LOOKUP_SHIFT;
2857 }
2858
2859 static inline u32 hpsa_tag_discard_error_bits(u32 tag)
2860 {
2861 #define HPSA_ERROR_BITS 0x03
2862         return tag & ~HPSA_ERROR_BITS;
2863 }
2864
2865 /* process completion of an indexed ("direct lookup") command */
2866 static inline u32 process_indexed_cmd(struct ctlr_info *h,
2867         u32 raw_tag)
2868 {
2869         u32 tag_index;
2870         struct CommandList *c;
2871
2872         tag_index = hpsa_tag_to_index(raw_tag);
2873         if (bad_tag(h, tag_index, raw_tag))
2874                 return next_command(h);
2875         c = h->cmd_pool + tag_index;
2876         finish_cmd(c, raw_tag);
2877         return next_command(h);
2878 }
2879
2880 /* process completion of a non-indexed command */
2881 static inline u32 process_nonindexed_cmd(struct ctlr_info *h,
2882         u32 raw_tag)
2883 {
2884         u32 tag;
2885         struct CommandList *c = NULL;
2886         struct hlist_node *tmp;
2887
2888         tag = hpsa_tag_discard_error_bits(raw_tag);
2889         hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
2890                 if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
2891                         finish_cmd(c, raw_tag);
2892                         return next_command(h);
2893                 }
2894         }
2895         bad_tag(h, h->nr_cmds + 1, raw_tag);
2896         return next_command(h);
2897 }
2898
2899 static irqreturn_t do_hpsa_intr(int irq, void *dev_id)
2900 {
2901         struct ctlr_info *h = dev_id;
2902         unsigned long flags;
2903         u32 raw_tag;
2904
2905         if (interrupt_not_for_us(h))
2906                 return IRQ_NONE;
2907         spin_lock_irqsave(&h->lock, flags);
2908         raw_tag = get_next_completion(h);
2909         while (raw_tag != FIFO_EMPTY) {
2910                 if (hpsa_tag_contains_index(raw_tag))
2911                         raw_tag = process_indexed_cmd(h, raw_tag);
2912                 else
2913                         raw_tag = process_nonindexed_cmd(h, raw_tag);
2914         }
2915         spin_unlock_irqrestore(&h->lock, flags);
2916         return IRQ_HANDLED;
2917 }
2918
2919 /* Send a message CDB to the firmware. */
2920 static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
2921                                                 unsigned char type)
2922 {
2923         struct Command {
2924                 struct CommandListHeader CommandHeader;
2925                 struct RequestBlock Request;
2926                 struct ErrDescriptor ErrorDescriptor;
2927         };
2928         struct Command *cmd;
2929         static const size_t cmd_sz = sizeof(*cmd) +
2930                                         sizeof(cmd->ErrorDescriptor);
2931         dma_addr_t paddr64;
2932         uint32_t paddr32, tag;
2933         void __iomem *vaddr;
2934         int i, err;
2935
2936         vaddr = pci_ioremap_bar(pdev, 0);
2937         if (vaddr == NULL)
2938                 return -ENOMEM;
2939
2940         /* The Inbound Post Queue only accepts 32-bit physical addresses for the
2941          * CCISS commands, so they must be allocated from the lower 4GiB of
2942          * memory.
2943          */
2944         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2945         if (err) {
2946                 iounmap(vaddr);
2947                 return -ENOMEM;
2948         }
2949
2950         cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
2951         if (cmd == NULL) {
2952                 iounmap(vaddr);
2953                 return -ENOMEM;
2954         }
2955
2956         /* This must fit, because of the 32-bit consistent DMA mask.  Also,
2957          * although there's no guarantee, we assume that the address is at
2958          * least 4-byte aligned (most likely, it's page-aligned).
2959          */
2960         paddr32 = paddr64;
2961
2962         cmd->CommandHeader.ReplyQueue = 0;
2963         cmd->CommandHeader.SGList = 0;
2964         cmd->CommandHeader.SGTotal = 0;
2965         cmd->CommandHeader.Tag.lower = paddr32;
2966         cmd->CommandHeader.Tag.upper = 0;
2967         memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
2968
2969         cmd->Request.CDBLen = 16;
2970         cmd->Request.Type.Type = TYPE_MSG;
2971         cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
2972         cmd->Request.Type.Direction = XFER_NONE;
2973         cmd->Request.Timeout = 0; /* Don't time out */
2974         cmd->Request.CDB[0] = opcode;
2975         cmd->Request.CDB[1] = type;
2976         memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
2977         cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
2978         cmd->ErrorDescriptor.Addr.upper = 0;
2979         cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
2980
2981         writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
2982
2983         for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
2984                 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
2985                 if (hpsa_tag_discard_error_bits(tag) == paddr32)
2986                         break;
2987                 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
2988         }
2989
2990         iounmap(vaddr);
2991
2992         /* we leak the DMA buffer here ... no choice since the controller could
2993          *  still complete the command.
2994          */
2995         if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
2996                 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
2997                         opcode, type);
2998                 return -ETIMEDOUT;
2999         }
3000
3001         pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3002
3003         if (tag & HPSA_ERROR_BIT) {
3004                 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
3005                         opcode, type);
3006                 return -EIO;
3007         }
3008
3009         dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
3010                 opcode, type);
3011         return 0;
3012 }
3013
3014 #define hpsa_soft_reset_controller(p) hpsa_message(p, 1, 0)
3015 #define hpsa_noop(p) hpsa_message(p, 3, 0)
3016
3017 static __devinit int hpsa_reset_msi(struct pci_dev *pdev)
3018 {
3019 /* the #defines are stolen from drivers/pci/msi.h. */
3020 #define msi_control_reg(base)           (base + PCI_MSI_FLAGS)
3021 #define PCI_MSIX_FLAGS_ENABLE           (1 << 15)
3022
3023         int pos;
3024         u16 control = 0;
3025
3026         pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
3027         if (pos) {
3028                 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3029                 if (control & PCI_MSI_FLAGS_ENABLE) {
3030                         dev_info(&pdev->dev, "resetting MSI\n");
3031                         pci_write_config_word(pdev, msi_control_reg(pos),
3032                                         control & ~PCI_MSI_FLAGS_ENABLE);
3033                 }
3034         }
3035
3036         pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3037         if (pos) {
3038                 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3039                 if (control & PCI_MSIX_FLAGS_ENABLE) {
3040                         dev_info(&pdev->dev, "resetting MSI-X\n");
3041                         pci_write_config_word(pdev, msi_control_reg(pos),
3042                                         control & ~PCI_MSIX_FLAGS_ENABLE);
3043                 }
3044         }
3045
3046         return 0;
3047 }
3048
3049 /* This does a hard reset of the controller using PCI power management
3050  * states.
3051  */
3052 static __devinit int hpsa_hard_reset_controller(struct pci_dev *pdev)
3053 {
3054         u16 pmcsr, saved_config_space[32];
3055         int i, pos;
3056
3057         dev_info(&pdev->dev, "using PCI PM to reset controller\n");
3058
3059         /* This is very nearly the same thing as
3060          *
3061          * pci_save_state(pci_dev);
3062          * pci_set_power_state(pci_dev, PCI_D3hot);
3063          * pci_set_power_state(pci_dev, PCI_D0);
3064          * pci_restore_state(pci_dev);
3065          *
3066          * but we can't use these nice canned kernel routines on
3067          * kexec, because they also check the MSI/MSI-X state in PCI
3068          * configuration space and do the wrong thing when it is
3069          * set/cleared.  Also, the pci_save/restore_state functions
3070          * violate the ordering requirements for restoring the
3071          * configuration space from the CCISS document (see the
3072          * comment below).  So we roll our own ....
3073          */
3074
3075         for (i = 0; i < 32; i++)
3076                 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
3077
3078         pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3079         if (pos == 0) {
3080                 dev_err(&pdev->dev,
3081                         "hpsa_reset_controller: PCI PM not supported\n");
3082                 return -ENODEV;
3083         }
3084
3085         /* Quoting from the Open CISS Specification: "The Power
3086          * Management Control/Status Register (CSR) controls the power
3087          * state of the device.  The normal operating state is D0,
3088          * CSR=00h.  The software off state is D3, CSR=03h.  To reset
3089          * the controller, place the interface device in D3 then to
3090          * D0, this causes a secondary PCI reset which will reset the
3091          * controller."
3092          */
3093
3094         /* enter the D3hot power management state */
3095         pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3096         pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3097         pmcsr |= PCI_D3hot;
3098         pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3099
3100         msleep(500);
3101
3102         /* enter the D0 power management state */
3103         pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3104         pmcsr |= PCI_D0;
3105         pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3106
3107         msleep(500);
3108
3109         /* Restore the PCI configuration space.  The Open CISS
3110          * Specification says, "Restore the PCI Configuration
3111          * Registers, offsets 00h through 60h. It is important to
3112          * restore the command register, 16-bits at offset 04h,
3113          * last. Do not restore the configuration status register,
3114          * 16-bits at offset 06h."  Note that the offset is 2*i.
3115          */
3116         for (i = 0; i < 32; i++) {
3117                 if (i == 2 || i == 3)
3118                         continue;
3119                 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
3120         }
3121         wmb();
3122         pci_write_config_word(pdev, 4, saved_config_space[2]);
3123
3124         return 0;
3125 }
3126
3127 /*
3128  *  We cannot read the structure directly, for portability we must use
3129  *   the io functions.
3130  *   This is for debug only.
3131  */
3132 static void print_cfg_table(struct device *dev, struct CfgTable *tb)
3133 {
3134 #ifdef HPSA_DEBUG
3135         int i;
3136         char temp_name[17];
3137
3138         dev_info(dev, "Controller Configuration information\n");
3139         dev_info(dev, "------------------------------------\n");
3140         for (i = 0; i < 4; i++)
3141                 temp_name[i] = readb(&(tb->Signature[i]));
3142         temp_name[4] = '\0';
3143         dev_info(dev, "   Signature = %s\n", temp_name);
3144         dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
3145         dev_info(dev, "   Transport methods supported = 0x%x\n",
3146                readl(&(tb->TransportSupport)));
3147         dev_info(dev, "   Transport methods active = 0x%x\n",
3148                readl(&(tb->TransportActive)));
3149         dev_info(dev, "   Requested transport Method = 0x%x\n",
3150                readl(&(tb->HostWrite.TransportRequest)));
3151         dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
3152                readl(&(tb->HostWrite.CoalIntDelay)));
3153         dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
3154                readl(&(tb->HostWrite.CoalIntCount)));
3155         dev_info(dev, "   Max outstanding commands = 0x%d\n",
3156                readl(&(tb->CmdsOutMax)));
3157         dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3158         for (i = 0; i < 16; i++)
3159                 temp_name[i] = readb(&(tb->ServerName[i]));
3160         temp_name[16] = '\0';
3161         dev_info(dev, "   Server Name = %s\n", temp_name);
3162         dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
3163                 readl(&(tb->HeartBeat)));
3164 #endif                          /* HPSA_DEBUG */
3165 }
3166
3167 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3168 {
3169         int i, offset, mem_type, bar_type;
3170
3171         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3172                 return 0;
3173         offset = 0;
3174         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3175                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3176                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3177                         offset += 4;
3178                 else {
3179                         mem_type = pci_resource_flags(pdev, i) &
3180                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3181                         switch (mem_type) {
3182                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
3183                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3184                                 offset += 4;    /* 32 bit */
3185                                 break;
3186                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
3187                                 offset += 8;
3188                                 break;
3189                         default:        /* reserved in PCI 2.2 */
3190                                 dev_warn(&pdev->dev,
3191                                        "base address is invalid\n");
3192                                 return -1;
3193                                 break;
3194                         }
3195                 }
3196                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3197                         return i + 1;
3198         }
3199         return -1;
3200 }
3201
3202 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3203  * controllers that are capable. If not, we use IO-APIC mode.
3204  */
3205
3206 static void __devinit hpsa_interrupt_mode(struct ctlr_info *h)
3207 {
3208 #ifdef CONFIG_PCI_MSI
3209         int err;
3210         struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1},
3211         {0, 2}, {0, 3}
3212         };
3213
3214         /* Some boards advertise MSI but don't really support it */
3215         if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
3216             (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
3217                 goto default_int_mode;
3218         if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
3219                 dev_info(&h->pdev->dev, "MSIX\n");
3220                 err = pci_enable_msix(h->pdev, hpsa_msix_entries, 4);
3221                 if (!err) {
3222                         h->intr[0] = hpsa_msix_entries[0].vector;
3223                         h->intr[1] = hpsa_msix_entries[1].vector;
3224                         h->intr[2] = hpsa_msix_entries[2].vector;
3225                         h->intr[3] = hpsa_msix_entries[3].vector;
3226                         h->msix_vector = 1;
3227                         return;
3228                 }
3229                 if (err > 0) {
3230                         dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
3231                                "available\n", err);
3232                         goto default_int_mode;
3233                 } else {
3234                         dev_warn(&h->pdev->dev, "MSI-X init failed %d\n",
3235                                err);
3236                         goto default_int_mode;
3237                 }
3238         }
3239         if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
3240                 dev_info(&h->pdev->dev, "MSI\n");
3241                 if (!pci_enable_msi(h->pdev))
3242                         h->msi_vector = 1;
3243                 else
3244                         dev_warn(&h->pdev->dev, "MSI init failed\n");
3245         }
3246 default_int_mode:
3247 #endif                          /* CONFIG_PCI_MSI */
3248         /* if we get here we're going to use the default interrupt mode */
3249         h->intr[PERF_MODE_INT] = h->pdev->irq;
3250 }
3251
3252 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
3253 {
3254         int i;
3255         u32 subsystem_vendor_id, subsystem_device_id;
3256
3257         subsystem_vendor_id = pdev->subsystem_vendor;
3258         subsystem_device_id = pdev->subsystem_device;
3259         *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
3260                     subsystem_vendor_id;
3261
3262         for (i = 0; i < ARRAY_SIZE(products); i++)
3263                 if (*board_id == products[i].board_id)
3264                         return i;
3265
3266         if (subsystem_vendor_id != PCI_VENDOR_ID_HP || !hpsa_allow_any) {
3267                 dev_warn(&pdev->dev, "unrecognized board ID: "
3268                         "0x%08x, ignoring.\n", *board_id);
3269                         return -ENODEV;
3270         }
3271         return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
3272 }
3273
3274 static inline bool hpsa_board_disabled(struct pci_dev *pdev)
3275 {
3276         u16 command;
3277
3278         (void) pci_read_config_word(pdev, PCI_COMMAND, &command);
3279         return ((command & PCI_COMMAND_MEMORY) == 0);
3280 }
3281
3282 static int __devinit hpsa_pci_find_memory_BAR(struct ctlr_info *h,
3283         unsigned long *memory_bar)
3284 {
3285         int i;
3286
3287         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
3288                 if (pci_resource_flags(h->pdev, i) & IORESOURCE_MEM) {
3289                         /* addressing mode bits already removed */
3290                         *memory_bar = pci_resource_start(h->pdev, i);
3291                         dev_dbg(&h->pdev->dev, "memory BAR = %lx\n",
3292                                 *memory_bar);
3293                         return 0;
3294                 }
3295         dev_warn(&h->pdev->dev, "no memory BAR found\n");
3296         return -ENODEV;
3297 }
3298
3299 static int __devinit hpsa_wait_for_board_ready(struct ctlr_info *h)
3300 {
3301         int i;
3302         u32 scratchpad;
3303
3304         for (i = 0; i < HPSA_BOARD_READY_ITERATIONS; i++) {
3305                 scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
3306                 if (scratchpad == HPSA_FIRMWARE_READY)
3307                         return 0;
3308                 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
3309         }
3310         dev_warn(&h->pdev->dev, "board not ready, timed out.\n");
3311         return -ENODEV;
3312 }
3313
3314 static int __devinit hpsa_find_cfgtables(struct ctlr_info *h)
3315 {
3316         u64 cfg_offset;
3317         u32 cfg_base_addr;
3318         u64 cfg_base_addr_index;
3319         u32 trans_offset;
3320
3321         /* get the address index number */
3322         cfg_base_addr = readl(h->vaddr + SA5_CTCFG_OFFSET);
3323         cfg_base_addr &= (u32) 0x0000ffff;
3324         cfg_base_addr_index = find_PCI_BAR_index(h->pdev, cfg_base_addr);
3325         if (cfg_base_addr_index == -1) {
3326                 dev_warn(&h->pdev->dev, "cannot find cfg_base_addr_index\n");
3327                 return -ENODEV;
3328         }
3329         cfg_offset = readl(h->vaddr + SA5_CTMEM_OFFSET);
3330         h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
3331                                cfg_base_addr_index) + cfg_offset,
3332                                 sizeof(h->cfgtable));
3333         if (!h->cfgtable)
3334                 return -ENOMEM;
3335         /* Find performant mode table. */
3336         trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3337         h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
3338                                 cfg_base_addr_index)+cfg_offset+trans_offset,
3339                                 sizeof(*h->transtable));
3340         if (!h->transtable)
3341                 return -ENOMEM;
3342         return 0;
3343 }
3344
3345 /* Interrogate the hardware for some limits:
3346  * max commands, max SG elements without chaining, and with chaining,
3347  * SG chain block size, etc.
3348  */
3349 static void __devinit hpsa_find_board_params(struct ctlr_info *h)
3350 {
3351         h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
3352         h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
3353         h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
3354         /*
3355          * Limit in-command s/g elements to 32 save dma'able memory.
3356          * Howvever spec says if 0, use 31
3357          */
3358         h->max_cmd_sg_entries = 31;
3359         if (h->maxsgentries > 512) {
3360                 h->max_cmd_sg_entries = 32;
3361                 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
3362                 h->maxsgentries--; /* save one for chain pointer */
3363         } else {
3364                 h->maxsgentries = 31; /* default to traditional values */
3365                 h->chainsize = 0;
3366         }
3367 }
3368
3369 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
3370 {
3371         if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
3372             (readb(&h->cfgtable->Signature[1]) != 'I') ||
3373             (readb(&h->cfgtable->Signature[2]) != 'S') ||
3374             (readb(&h->cfgtable->Signature[3]) != 'S')) {
3375                 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
3376                 return false;
3377         }
3378         return true;
3379 }
3380
3381 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3382 static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
3383 {
3384 #ifdef CONFIG_X86
3385         u32 prefetch;
3386
3387         prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
3388         prefetch |= 0x100;
3389         writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
3390 #endif
3391 }
3392
3393 /* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
3394  * in a prefetch beyond physical memory.
3395  */
3396 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
3397 {
3398         u32 dma_prefetch;
3399
3400         if (h->board_id != 0x3225103C)
3401                 return;
3402         dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
3403         dma_prefetch |= 0x8000;
3404         writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
3405 }
3406
3407 static void __devinit hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
3408 {
3409         int i;
3410
3411         /* under certain very rare conditions, this can take awhile.
3412          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3413          * as we enter this code.)
3414          */
3415         for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3416                 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3417                         break;
3418                 /* delay and try again */
3419                 msleep(10);
3420         }
3421 }
3422
3423 static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h)
3424 {
3425         u32 trans_support;
3426
3427         trans_support = readl(&(h->cfgtable->TransportSupport));
3428         if (!(trans_support & SIMPLE_MODE))
3429                 return -ENOTSUPP;
3430
3431         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3432         /* Update the field, and then ring the doorbell */
3433         writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
3434         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3435         hpsa_wait_for_mode_change_ack(h);
3436         print_cfg_table(&h->pdev->dev, h->cfgtable);
3437         if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3438                 dev_warn(&h->pdev->dev,
3439                         "unable to get board into simple mode\n");
3440                 return -ENODEV;
3441         }
3442         return 0;
3443 }
3444
3445 static int __devinit hpsa_pci_init(struct ctlr_info *h)
3446 {
3447         int prod_index, err;
3448
3449         prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
3450         if (prod_index < 0)
3451                 return -ENODEV;
3452         h->product_name = products[prod_index].product_name;
3453         h->access = *(products[prod_index].access);
3454
3455         if (hpsa_board_disabled(h->pdev)) {
3456                 dev_warn(&h->pdev->dev, "controller appears to be disabled\n");
3457                 return -ENODEV;
3458         }
3459         err = pci_enable_device(h->pdev);
3460         if (err) {
3461                 dev_warn(&h->pdev->dev, "unable to enable PCI device\n");
3462                 return err;
3463         }
3464
3465         err = pci_request_regions(h->pdev, "hpsa");
3466         if (err) {
3467                 dev_err(&h->pdev->dev,
3468                         "cannot obtain PCI resources, aborting\n");
3469                 return err;
3470         }
3471         hpsa_interrupt_mode(h);
3472         err = hpsa_pci_find_memory_BAR(h, &h->paddr);
3473         if (err)
3474                 goto err_out_free_res;
3475         h->vaddr = remap_pci_mem(h->paddr, 0x250);
3476         if (!h->vaddr) {
3477                 err = -ENOMEM;
3478                 goto err_out_free_res;
3479         }
3480         err = hpsa_wait_for_board_ready(h);
3481         if (err)
3482                 goto err_out_free_res;
3483         err = hpsa_find_cfgtables(h);
3484         if (err)
3485                 goto err_out_free_res;
3486         hpsa_find_board_params(h);
3487
3488         if (!hpsa_CISS_signature_present(h)) {
3489                 err = -ENODEV;
3490                 goto err_out_free_res;
3491         }
3492         hpsa_enable_scsi_prefetch(h);
3493         hpsa_p600_dma_prefetch_quirk(h);
3494         err = hpsa_enter_simple_mode(h);
3495         if (err)
3496                 goto err_out_free_res;
3497         return 0;
3498
3499 err_out_free_res:
3500         if (h->transtable)
3501                 iounmap(h->transtable);
3502         if (h->cfgtable)
3503                 iounmap(h->cfgtable);
3504         if (h->vaddr)
3505                 iounmap(h->vaddr);
3506         /*
3507          * Deliberately omit pci_disable_device(): it does something nasty to
3508          * Smart Array controllers that pci_enable_device does not undo
3509          */
3510         pci_release_regions(h->pdev);
3511         return err;
3512 }
3513
3514 static void __devinit hpsa_hba_inquiry(struct ctlr_info *h)
3515 {
3516         int rc;
3517
3518 #define HBA_INQUIRY_BYTE_COUNT 64
3519         h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
3520         if (!h->hba_inquiry_data)
3521                 return;
3522         rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
3523                 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
3524         if (rc != 0) {
3525                 kfree(h->hba_inquiry_data);
3526                 h->hba_inquiry_data = NULL;
3527         }
3528 }
3529
3530 static int __devinit hpsa_init_one(struct pci_dev *pdev,
3531                                     const struct pci_device_id *ent)
3532 {
3533         int i, rc;
3534         int dac;
3535         struct ctlr_info *h;
3536
3537         if (number_of_controllers == 0)
3538                 printk(KERN_INFO DRIVER_NAME "\n");
3539         if (reset_devices) {
3540                 /* Reset the controller with a PCI power-cycle */
3541                 if (hpsa_hard_reset_controller(pdev) || hpsa_reset_msi(pdev))
3542                         return -ENODEV;
3543
3544                 /* Some devices (notably the HP Smart Array 5i Controller)
3545                    need a little pause here */
3546                 msleep(HPSA_POST_RESET_PAUSE_MSECS);
3547
3548                 /* Now try to get the controller to respond to a no-op */
3549                 for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
3550                         if (hpsa_noop(pdev) == 0)
3551                                 break;
3552                         else
3553                                 dev_warn(&pdev->dev, "no-op failed%s\n",
3554                                                 (i < 11 ? "; re-trying" : ""));
3555                 }
3556         }
3557
3558         /* Command structures must be aligned on a 32-byte boundary because
3559          * the 5 lower bits of the address are used by the hardware. and by
3560          * the driver.  See comments in hpsa.h for more info.
3561          */
3562 #define COMMANDLIST_ALIGNMENT 32
3563         BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
3564         h = kzalloc(sizeof(*h), GFP_KERNEL);
3565         if (!h)
3566                 return -ENOMEM;
3567
3568         h->pdev = pdev;
3569         h->busy_initializing = 1;
3570         INIT_HLIST_HEAD(&h->cmpQ);
3571         INIT_HLIST_HEAD(&h->reqQ);
3572         rc = hpsa_pci_init(h);
3573         if (rc != 0)
3574                 goto clean1;
3575
3576         sprintf(h->devname, "hpsa%d", number_of_controllers);
3577         h->ctlr = number_of_controllers;
3578         number_of_controllers++;
3579
3580         /* configure PCI DMA stuff */
3581         rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3582         if (rc == 0) {
3583                 dac = 1;
3584         } else {
3585                 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3586                 if (rc == 0) {
3587                         dac = 0;
3588                 } else {
3589                         dev_err(&pdev->dev, "no suitable DMA available\n");
3590                         goto clean1;
3591                 }
3592         }
3593
3594         /* make sure the board interrupts are off */
3595         h->access.set_intr_mask(h, HPSA_INTR_OFF);
3596         rc = request_irq(h->intr[PERF_MODE_INT], do_hpsa_intr,
3597                         IRQF_DISABLED, h->devname, h);
3598         if (rc) {
3599                 dev_err(&pdev->dev, "unable to get irq %d for %s\n",
3600                        h->intr[PERF_MODE_INT], h->devname);
3601                 goto clean2;
3602         }
3603
3604         dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
3605                h->devname, pdev->device,
3606                h->intr[PERF_MODE_INT], dac ? "" : " not");
3607
3608         h->cmd_pool_bits =
3609             kmalloc(((h->nr_cmds + BITS_PER_LONG -
3610                       1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
3611         h->cmd_pool = pci_alloc_consistent(h->pdev,
3612                     h->nr_cmds * sizeof(*h->cmd_pool),
3613                     &(h->cmd_pool_dhandle));
3614         h->errinfo_pool = pci_alloc_consistent(h->pdev,
3615                     h->nr_cmds * sizeof(*h->errinfo_pool),
3616                     &(h->errinfo_pool_dhandle));
3617         if ((h->cmd_pool_bits == NULL)
3618             || (h->cmd_pool == NULL)
3619             || (h->errinfo_pool == NULL)) {
3620                 dev_err(&pdev->dev, "out of memory");
3621                 rc = -ENOMEM;
3622                 goto clean4;
3623         }
3624         if (hpsa_allocate_sg_chain_blocks(h))
3625                 goto clean4;
3626         spin_lock_init(&h->lock);
3627         spin_lock_init(&h->scan_lock);
3628         init_waitqueue_head(&h->scan_wait_queue);
3629         h->scan_finished = 1; /* no scan currently in progress */
3630
3631         pci_set_drvdata(pdev, h);
3632         memset(h->cmd_pool_bits, 0,
3633                ((h->nr_cmds + BITS_PER_LONG -
3634                  1) / BITS_PER_LONG) * sizeof(unsigned long));
3635
3636         hpsa_scsi_setup(h);
3637
3638         /* Turn the interrupts on so we can service requests */
3639         h->access.set_intr_mask(h, HPSA_INTR_ON);
3640
3641         hpsa_put_ctlr_into_performant_mode(h);
3642         hpsa_hba_inquiry(h);
3643         hpsa_register_scsi(h);  /* hook ourselves into SCSI subsystem */
3644         h->busy_initializing = 0;
3645         return 1;
3646
3647 clean4:
3648         hpsa_free_sg_chain_blocks(h);
3649         kfree(h->cmd_pool_bits);
3650         if (h->cmd_pool)
3651                 pci_free_consistent(h->pdev,
3652                             h->nr_cmds * sizeof(struct CommandList),
3653                             h->cmd_pool, h->cmd_pool_dhandle);
3654         if (h->errinfo_pool)
3655                 pci_free_consistent(h->pdev,
3656                             h->nr_cmds * sizeof(struct ErrorInfo),
3657                             h->errinfo_pool,
3658                             h->errinfo_pool_dhandle);
3659         free_irq(h->intr[PERF_MODE_INT], h);
3660 clean2:
3661 clean1:
3662         h->busy_initializing = 0;
3663         kfree(h);
3664         return rc;
3665 }
3666
3667 static void hpsa_flush_cache(struct ctlr_info *h)
3668 {
3669         char *flush_buf;
3670         struct CommandList *c;
3671
3672         flush_buf = kzalloc(4, GFP_KERNEL);
3673         if (!flush_buf)
3674                 return;
3675
3676         c = cmd_special_alloc(h);
3677         if (!c) {
3678                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
3679                 goto out_of_memory;
3680         }
3681         fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
3682                 RAID_CTLR_LUNID, TYPE_CMD);
3683         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
3684         if (c->err_info->CommandStatus != 0)
3685                 dev_warn(&h->pdev->dev,
3686                         "error flushing cache on controller\n");
3687         cmd_special_free(h, c);
3688 out_of_memory:
3689         kfree(flush_buf);
3690 }
3691
3692 static void hpsa_shutdown(struct pci_dev *pdev)
3693 {
3694         struct ctlr_info *h;
3695
3696         h = pci_get_drvdata(pdev);
3697         /* Turn board interrupts off  and send the flush cache command
3698          * sendcmd will turn off interrupt, and send the flush...
3699          * To write all data in the battery backed cache to disks
3700          */
3701         hpsa_flush_cache(h);
3702         h->access.set_intr_mask(h, HPSA_INTR_OFF);
3703         free_irq(h->intr[PERF_MODE_INT], h);
3704 #ifdef CONFIG_PCI_MSI
3705         if (h->msix_vector)
3706                 pci_disable_msix(h->pdev);
3707         else if (h->msi_vector)
3708                 pci_disable_msi(h->pdev);
3709 #endif                          /* CONFIG_PCI_MSI */
3710 }
3711
3712 static void __devexit hpsa_remove_one(struct pci_dev *pdev)
3713 {
3714         struct ctlr_info *h;
3715
3716         if (pci_get_drvdata(pdev) == NULL) {
3717                 dev_err(&pdev->dev, "unable to remove device \n");
3718                 return;
3719         }
3720         h = pci_get_drvdata(pdev);
3721         hpsa_unregister_scsi(h);        /* unhook from SCSI subsystem */
3722         hpsa_shutdown(pdev);
3723         iounmap(h->vaddr);
3724         iounmap(h->transtable);
3725         iounmap(h->cfgtable);
3726         hpsa_free_sg_chain_blocks(h);
3727         pci_free_consistent(h->pdev,
3728                 h->nr_cmds * sizeof(struct CommandList),
3729                 h->cmd_pool, h->cmd_pool_dhandle);
3730         pci_free_consistent(h->pdev,
3731                 h->nr_cmds * sizeof(struct ErrorInfo),
3732                 h->errinfo_pool, h->errinfo_pool_dhandle);
3733         pci_free_consistent(h->pdev, h->reply_pool_size,
3734                 h->reply_pool, h->reply_pool_dhandle);
3735         kfree(h->cmd_pool_bits);
3736         kfree(h->blockFetchTable);
3737         kfree(h->hba_inquiry_data);
3738         /*
3739          * Deliberately omit pci_disable_device(): it does something nasty to
3740          * Smart Array controllers that pci_enable_device does not undo
3741          */
3742         pci_release_regions(pdev);
3743         pci_set_drvdata(pdev, NULL);
3744         kfree(h);
3745 }
3746
3747 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
3748         __attribute__((unused)) pm_message_t state)
3749 {
3750         return -ENOSYS;
3751 }
3752
3753 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
3754 {
3755         return -ENOSYS;
3756 }
3757
3758 static struct pci_driver hpsa_pci_driver = {
3759         .name = "hpsa",
3760         .probe = hpsa_init_one,
3761         .remove = __devexit_p(hpsa_remove_one),
3762         .id_table = hpsa_pci_device_id, /* id_table */
3763         .shutdown = hpsa_shutdown,
3764         .suspend = hpsa_suspend,
3765         .resume = hpsa_resume,
3766 };
3767
3768 /* Fill in bucket_map[], given nsgs (the max number of
3769  * scatter gather elements supported) and bucket[],
3770  * which is an array of 8 integers.  The bucket[] array
3771  * contains 8 different DMA transfer sizes (in 16
3772  * byte increments) which the controller uses to fetch
3773  * commands.  This function fills in bucket_map[], which
3774  * maps a given number of scatter gather elements to one of
3775  * the 8 DMA transfer sizes.  The point of it is to allow the
3776  * controller to only do as much DMA as needed to fetch the
3777  * command, with the DMA transfer size encoded in the lower
3778  * bits of the command address.
3779  */
3780 static void  calc_bucket_map(int bucket[], int num_buckets,
3781         int nsgs, int *bucket_map)
3782 {
3783         int i, j, b, size;
3784
3785         /* even a command with 0 SGs requires 4 blocks */
3786 #define MINIMUM_TRANSFER_BLOCKS 4
3787 #define NUM_BUCKETS 8
3788         /* Note, bucket_map must have nsgs+1 entries. */
3789         for (i = 0; i <= nsgs; i++) {
3790                 /* Compute size of a command with i SG entries */
3791                 size = i + MINIMUM_TRANSFER_BLOCKS;
3792                 b = num_buckets; /* Assume the biggest bucket */
3793                 /* Find the bucket that is just big enough */
3794                 for (j = 0; j < 8; j++) {
3795                         if (bucket[j] >= size) {
3796                                 b = j;
3797                                 break;
3798                         }
3799                 }
3800                 /* for a command with i SG entries, use bucket b. */
3801                 bucket_map[i] = b;
3802         }
3803 }
3804
3805 static __devinit void hpsa_enter_performant_mode(struct ctlr_info *h)
3806 {
3807         int i;
3808         unsigned long register_value;
3809         int bft[8] = {5, 6, 8, 10, 12, 20, 28, 35}; /* for scatter/gathers */
3810         /*  5 = 1 s/g entry or 4k
3811          *  6 = 2 s/g entry or 8k
3812          *  8 = 4 s/g entry or 16k
3813          * 10 = 6 s/g entry or 24k
3814          */
3815
3816         h->reply_pool_wraparound = 1; /* spec: init to 1 */
3817
3818         /* Controller spec: zero out this buffer. */
3819         memset(h->reply_pool, 0, h->reply_pool_size);
3820         h->reply_pool_head = h->reply_pool;
3821
3822         bft[7] = h->max_sg_entries + 4;
3823         calc_bucket_map(bft, ARRAY_SIZE(bft), 32, h->blockFetchTable);
3824         for (i = 0; i < 8; i++)
3825                 writel(bft[i], &h->transtable->BlockFetch[i]);
3826
3827         /* size of controller ring buffer */
3828         writel(h->max_commands, &h->transtable->RepQSize);
3829         writel(1, &h->transtable->RepQCount);
3830         writel(0, &h->transtable->RepQCtrAddrLow32);
3831         writel(0, &h->transtable->RepQCtrAddrHigh32);
3832         writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
3833         writel(0, &h->transtable->RepQAddr0High32);
3834         writel(CFGTBL_Trans_Performant,
3835                 &(h->cfgtable->HostWrite.TransportRequest));
3836         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3837         hpsa_wait_for_mode_change_ack(h);
3838         register_value = readl(&(h->cfgtable->TransportActive));
3839         if (!(register_value & CFGTBL_Trans_Performant)) {
3840                 dev_warn(&h->pdev->dev, "unable to get board into"
3841                                         " performant mode\n");
3842                 return;
3843         }
3844 }
3845
3846 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
3847 {
3848         u32 trans_support;
3849
3850         trans_support = readl(&(h->cfgtable->TransportSupport));
3851         if (!(trans_support & PERFORMANT_MODE))
3852                 return;
3853
3854         h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
3855         h->max_sg_entries = 32;
3856         /* Performant mode ring buffer and supporting data structures */
3857         h->reply_pool_size = h->max_commands * sizeof(u64);
3858         h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size,
3859                                 &(h->reply_pool_dhandle));
3860
3861         /* Need a block fetch table for performant mode */
3862         h->blockFetchTable = kmalloc(((h->max_sg_entries+1) *
3863                                 sizeof(u32)), GFP_KERNEL);
3864
3865         if ((h->reply_pool == NULL)
3866                 || (h->blockFetchTable == NULL))
3867                 goto clean_up;
3868
3869         hpsa_enter_performant_mode(h);
3870
3871         /* Change the access methods to the performant access methods */
3872         h->access = SA5_performant_access;
3873         h->transMethod = CFGTBL_Trans_Performant;
3874
3875         return;
3876
3877 clean_up:
3878         if (h->reply_pool)
3879                 pci_free_consistent(h->pdev, h->reply_pool_size,
3880                         h->reply_pool, h->reply_pool_dhandle);
3881         kfree(h->blockFetchTable);
3882 }
3883
3884 /*
3885  *  This is it.  Register the PCI driver information for the cards we control
3886  *  the OS will call our registered routines when it finds one of our cards.
3887  */
3888 static int __init hpsa_init(void)
3889 {
3890         return pci_register_driver(&hpsa_pci_driver);
3891 }
3892
3893 static void __exit hpsa_cleanup(void)
3894 {
3895         pci_unregister_driver(&hpsa_pci_driver);
3896 }
3897
3898 module_init(hpsa_init);
3899 module_exit(hpsa_cleanup);