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/compat.h>
  35 #include <linux/blktrace_api.h>
  36 #include <linux/uaccess.h>
  37 #include <linux/io.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/completion.h>
  40 #include <linux/moduleparam.h>
  41 #include <scsi/scsi.h>
  42 #include <scsi/scsi_cmnd.h>
  43 #include <scsi/scsi_device.h>
  44 #include <scsi/scsi_host.h>
  45 #include <scsi/scsi_tcq.h>
  46 #include <linux/cciss_ioctl.h>
  47 #include <linux/string.h>
  48 #include <linux/bitmap.h>
  49 #include <linux/atomic.h>
  50 #include <linux/kthread.h>
  51 #include "hpsa_cmd.h"
  52 #include "hpsa.h"
  53
  54 /* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
  55 #define HPSA_DRIVER_VERSION "2.0.2-1"
  56 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
  57
  58 /* How long to wait (in milliseconds) for board to go into simple mode */
  59 #define MAX_CONFIG_WAIT 30000
  60 #define MAX_IOCTL_CONFIG_WAIT 1000
  61
  62 /*define how many times we will try a command because of bus resets */
  63 #define MAX_CMD_RETRIES 3
  64
  65 /* Embedded module documentation macros - see modules.h */
  66 MODULE_AUTHOR("Hewlett-Packard Company");
  67 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
  68         HPSA_DRIVER_VERSION);
  69 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
  70 MODULE_VERSION(HPSA_DRIVER_VERSION);
  71 MODULE_LICENSE("GPL");
  72
  73 static int hpsa_allow_any;
  74 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
  75 MODULE_PARM_DESC(hpsa_allow_any,
  76                 "Allow hpsa driver to access unknown HP Smart Array hardware");
  77 static int hpsa_simple_mode;
  78 module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
  79 MODULE_PARM_DESC(hpsa_simple_mode,
  80         "Use 'simple mode' rather than 'performant mode'");
  81
  82 /* define the PCI info for the cards we can control */
  83 static const struct pci_device_id hpsa_pci_device_id[] = {
  84         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
  85         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
  86         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
  87         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
  88         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
  89         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324a},
  90         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324b},
  91         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
  92         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3350},
  93         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3351},
  94         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3352},
  95         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3353},
  96         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3354},
  97         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
  98         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
  99         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
 100                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 101         {0,}
 102 };
 103
 104 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
 105
 106 /*  board_id = Subsystem Device ID & Vendor ID
 107  *  product = Marketing Name for the board
 108  *  access = Address of the struct of function pointers
 109  */
 110 static struct board_type products[] = {
 111         {0x3241103C, "Smart Array P212", &SA5_access},
 112         {0x3243103C, "Smart Array P410", &SA5_access},
 113         {0x3245103C, "Smart Array P410i", &SA5_access},
 114         {0x3247103C, "Smart Array P411", &SA5_access},
 115         {0x3249103C, "Smart Array P812", &SA5_access},
 116         {0x324a103C, "Smart Array P712m", &SA5_access},
 117         {0x324b103C, "Smart Array P711m", &SA5_access},
 118         {0x3350103C, "Smart Array", &SA5_access},
 119         {0x3351103C, "Smart Array", &SA5_access},
 120         {0x3352103C, "Smart Array", &SA5_access},
 121         {0x3353103C, "Smart Array", &SA5_access},
 122         {0x3354103C, "Smart Array", &SA5_access},
 123         {0x3355103C, "Smart Array", &SA5_access},
 124         {0x3356103C, "Smart Array", &SA5_access},
 125         {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 126 };
 127
 128 static int number_of_controllers;
 129
 130 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
 131 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
 132 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
 133 static void start_io(struct ctlr_info *h);
 134
 135 #ifdef CONFIG_COMPAT
 136 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
 137 #endif
 138
 139 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 140 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
 141 static struct CommandList *cmd_alloc(struct ctlr_info *h);
 142 static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
 143 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 144         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
 145         int cmd_type);
 146
 147 static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 148 static void hpsa_scan_start(struct Scsi_Host *);
 149 static int hpsa_scan_finished(struct Scsi_Host *sh,
 150         unsigned long elapsed_time);
 151 static int hpsa_change_queue_depth(struct scsi_device *sdev,
 152         int qdepth, int reason);
 153
 154 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 155 static int hpsa_slave_alloc(struct scsi_device *sdev);
 156 static void hpsa_slave_destroy(struct scsi_device *sdev);
 157
 158 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
 159 static int check_for_unit_attention(struct ctlr_info *h,
 160         struct CommandList *c);
 161 static void check_ioctl_unit_attention(struct ctlr_info *h,
 162         struct CommandList *c);
 163 /* performant mode helper functions */
 164 static void calc_bucket_map(int *bucket, int num_buckets,
 165         int nsgs, int *bucket_map);
 166 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 167 static inline u32 next_command(struct ctlr_info *h);
 168 static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev,
 169         void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
 170         u64 *cfg_offset);
 171 static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
 172         unsigned long *memory_bar);
 173 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
 174 static int __devinit hpsa_wait_for_board_state(struct pci_dev *pdev,
 175         void __iomem *vaddr, int wait_for_ready);
 176 #define BOARD_NOT_READY 0
 177 #define BOARD_READY 1
 178
 179 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 180 {
 181         unsigned long *priv = shost_priv(sdev->host);
 182         return (struct ctlr_info *) *priv;
 183 }
 184
 185 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 186 {
 187         unsigned long *priv = shost_priv(sh);
 188         return (struct ctlr_info *) *priv;
 189 }
 190
 191 static int check_for_unit_attention(struct ctlr_info *h,
 192         struct CommandList *c)
 193 {
 194         if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
 195                 return 0;
 196
 197         switch (c->err_info->SenseInfo[12]) {
 198         case STATE_CHANGED:
 199                 dev_warn(&h->pdev->dev, "hpsa%d: a state change "
 200                         "detected, command retried\n", h->ctlr);
 201                 break;
 202         case LUN_FAILED:
 203                 dev_warn(&h->pdev->dev, "hpsa%d: LUN failure "
 204                         "detected, action required\n", h->ctlr);
 205                 break;
 206         case REPORT_LUNS_CHANGED:
 207                 dev_warn(&h->pdev->dev, "hpsa%d: report LUN data "
 208                         "changed, action required\n", h->ctlr);
 209         /*
 210          * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
 211          */
 212                 break;
 213         case POWER_OR_RESET:
 214                 dev_warn(&h->pdev->dev, "hpsa%d: a power on "
 215                         "or device reset detected\n", h->ctlr);
 216                 break;
 217         case UNIT_ATTENTION_CLEARED:
 218                 dev_warn(&h->pdev->dev, "hpsa%d: unit attention "
 219                     "cleared by another initiator\n", h->ctlr);
 220                 break;
 221         default:
 222                 dev_warn(&h->pdev->dev, "hpsa%d: unknown "
 223                         "unit attention detected\n", h->ctlr);
 224                 break;
 225         }
 226         return 1;
 227 }
 228
 229 static ssize_t host_store_rescan(struct device *dev,
 230                                  struct device_attribute *attr,
 231                                  const char *buf, size_t count)
 232 {
 233         struct ctlr_info *h;
 234         struct Scsi_Host *shost = class_to_shost(dev);
 235         h = shost_to_hba(shost);
 236         hpsa_scan_start(h->scsi_host);
 237         return count;
 238 }
 239
 240 static ssize_t host_show_firmware_revision(struct device *dev,
 241              struct device_attribute *attr, char *buf)
 242 {
 243         struct ctlr_info *h;
 244         struct Scsi_Host *shost = class_to_shost(dev);
 245         unsigned char *fwrev;
 246
 247         h = shost_to_hba(shost);
 248         if (!h->hba_inquiry_data)
 249                 return 0;
 250         fwrev = &h->hba_inquiry_data[32];
 251         return snprintf(buf, 20, "%c%c%c%c\n",
 252                 fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
 253 }
 254
 255 static ssize_t host_show_commands_outstanding(struct device *dev,
 256              struct device_attribute *attr, char *buf)
 257 {
 258         struct Scsi_Host *shost = class_to_shost(dev);
 259         struct ctlr_info *h = shost_to_hba(shost);
 260
 261         return snprintf(buf, 20, "%d\n", h->commands_outstanding);
 262 }
 263
 264 static ssize_t host_show_transport_mode(struct device *dev,
 265         struct device_attribute *attr, char *buf)
 266 {
 267         struct ctlr_info *h;
 268         struct Scsi_Host *shost = class_to_shost(dev);
 269
 270         h = shost_to_hba(shost);
 271         return snprintf(buf, 20, "%s\n",
 272                 h->transMethod & CFGTBL_Trans_Performant ?
 273                         "performant" : "simple");
 274 }
 275
 276 /* List of controllers which cannot be hard reset on kexec with reset_devices */
 277 static u32 unresettable_controller[] = {
 278         0x324a103C, /* Smart Array P712m */
 279         0x324b103C, /* SmartArray P711m */
 280         0x3223103C, /* Smart Array P800 */
 281         0x3234103C, /* Smart Array P400 */
 282         0x3235103C, /* Smart Array P400i */
 283         0x3211103C, /* Smart Array E200i */
 284         0x3212103C, /* Smart Array E200 */
 285         0x3213103C, /* Smart Array E200i */
 286         0x3214103C, /* Smart Array E200i */
 287         0x3215103C, /* Smart Array E200i */
 288         0x3237103C, /* Smart Array E500 */
 289         0x323D103C, /* Smart Array P700m */
 290         0x409C0E11, /* Smart Array 6400 */
 291         0x409D0E11, /* Smart Array 6400 EM */
 292 };
 293
 294 /* List of controllers which cannot even be soft reset */
 295 static u32 soft_unresettable_controller[] = {
 296         /* Exclude 640x boards.  These are two pci devices in one slot
 297          * which share a battery backed cache module.  One controls the
 298          * cache, the other accesses the cache through the one that controls
 299          * it.  If we reset the one controlling the cache, the other will
 300          * likely not be happy.  Just forbid resetting this conjoined mess.
 301          * The 640x isn't really supported by hpsa anyway.
 302          */
 303         0x409C0E11, /* Smart Array 6400 */
 304         0x409D0E11, /* Smart Array 6400 EM */
 305 };
 306
 307 static int ctlr_is_hard_resettable(u32 board_id)
 308 {
 309         int i;
 310
 311         for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
 312                 if (unresettable_controller[i] == board_id)
 313                         return 0;
 314         return 1;
 315 }
 316
 317 static int ctlr_is_soft_resettable(u32 board_id)
 318 {
 319         int i;
 320
 321         for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
 322                 if (soft_unresettable_controller[i] == board_id)
 323                         return 0;
 324         return 1;
 325 }
 326
 327 static int ctlr_is_resettable(u32 board_id)
 328 {
 329         return ctlr_is_hard_resettable(board_id) ||
 330                 ctlr_is_soft_resettable(board_id);
 331 }
 332
 333 static ssize_t host_show_resettable(struct device *dev,
 334         struct device_attribute *attr, char *buf)
 335 {
 336         struct ctlr_info *h;
 337         struct Scsi_Host *shost = class_to_shost(dev);
 338
 339         h = shost_to_hba(shost);
 340         return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
 341 }
 342
 343 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 344 {
 345         return (scsi3addr[3] & 0xC0) == 0x40;
 346 }
 347
 348 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 349         "UNKNOWN"
 350 };
 351 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
 352
 353 static ssize_t raid_level_show(struct device *dev,
 354              struct device_attribute *attr, char *buf)
 355 {
 356         ssize_t l = 0;
 357         unsigned char rlevel;
 358         struct ctlr_info *h;
 359         struct scsi_device *sdev;
 360         struct hpsa_scsi_dev_t *hdev;
 361         unsigned long flags;
 362
 363         sdev = to_scsi_device(dev);
 364         h = sdev_to_hba(sdev);
 365         spin_lock_irqsave(&h->lock, flags);
 366         hdev = sdev->hostdata;
 367         if (!hdev) {
 368                 spin_unlock_irqrestore(&h->lock, flags);
 369                 return -ENODEV;
 370         }
 371
 372         /* Is this even a logical drive? */
 373         if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
 374                 spin_unlock_irqrestore(&h->lock, flags);
 375                 l = snprintf(buf, PAGE_SIZE, "N/A\n");
 376                 return l;
 377         }
 378
 379         rlevel = hdev->raid_level;
 380         spin_unlock_irqrestore(&h->lock, flags);
 381         if (rlevel > RAID_UNKNOWN)
 382                 rlevel = RAID_UNKNOWN;
 383         l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 384         return l;
 385 }
 386
 387 static ssize_t lunid_show(struct device *dev,
 388              struct device_attribute *attr, char *buf)
 389 {
 390         struct ctlr_info *h;
 391         struct scsi_device *sdev;
 392         struct hpsa_scsi_dev_t *hdev;
 393         unsigned long flags;
 394         unsigned char lunid[8];
 395
 396         sdev = to_scsi_device(dev);
 397         h = sdev_to_hba(sdev);
 398         spin_lock_irqsave(&h->lock, flags);
 399         hdev = sdev->hostdata;
 400         if (!hdev) {
 401                 spin_unlock_irqrestore(&h->lock, flags);
 402                 return -ENODEV;
 403         }
 404         memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 405         spin_unlock_irqrestore(&h->lock, flags);
 406         return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 407                 lunid[0], lunid[1], lunid[2], lunid[3],
 408                 lunid[4], lunid[5], lunid[6], lunid[7]);
 409 }
 410
 411 static ssize_t unique_id_show(struct device *dev,
 412              struct device_attribute *attr, char *buf)
 413 {
 414         struct ctlr_info *h;
 415         struct scsi_device *sdev;
 416         struct hpsa_scsi_dev_t *hdev;
 417         unsigned long flags;
 418         unsigned char sn[16];
 419
 420         sdev = to_scsi_device(dev);
 421         h = sdev_to_hba(sdev);
 422         spin_lock_irqsave(&h->lock, flags);
 423         hdev = sdev->hostdata;
 424         if (!hdev) {
 425                 spin_unlock_irqrestore(&h->lock, flags);
 426                 return -ENODEV;
 427         }
 428         memcpy(sn, hdev->device_id, sizeof(sn));
 429         spin_unlock_irqrestore(&h->lock, flags);
 430         return snprintf(buf, 16 * 2 + 2,
 431                         "%02X%02X%02X%02X%02X%02X%02X%02X"
 432                         "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 433                         sn[0], sn[1], sn[2], sn[3],
 434                         sn[4], sn[5], sn[6], sn[7],
 435                         sn[8], sn[9], sn[10], sn[11],
 436                         sn[12], sn[13], sn[14], sn[15]);
 437 }
 438
 439 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
 440 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
 441 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
 442 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 443 static DEVICE_ATTR(firmware_revision, S_IRUGO,
 444         host_show_firmware_revision, NULL);
 445 static DEVICE_ATTR(commands_outstanding, S_IRUGO,
 446         host_show_commands_outstanding, NULL);
 447 static DEVICE_ATTR(transport_mode, S_IRUGO,
 448         host_show_transport_mode, NULL);
 449 static DEVICE_ATTR(resettable, S_IRUGO,
 450         host_show_resettable, NULL);
 451
 452 static struct device_attribute *hpsa_sdev_attrs[] = {
 453         &dev_attr_raid_level,
 454         &dev_attr_lunid,
 455         &dev_attr_unique_id,
 456         NULL,
 457 };
 458
 459 static struct device_attribute *hpsa_shost_attrs[] = {
 460         &dev_attr_rescan,
 461         &dev_attr_firmware_revision,
 462         &dev_attr_commands_outstanding,
 463         &dev_attr_transport_mode,
 464         &dev_attr_resettable,
 465         NULL,
 466 };
 467
 468 static struct scsi_host_template hpsa_driver_template = {
 469         .module                 = THIS_MODULE,
 470         .name                   = "hpsa",
 471         .proc_name              = "hpsa",
 472         .queuecommand           = hpsa_scsi_queue_command,
 473         .scan_start             = hpsa_scan_start,
 474         .scan_finished          = hpsa_scan_finished,
 475         .change_queue_depth     = hpsa_change_queue_depth,
 476         .this_id                = -1,
 477         .use_clustering         = ENABLE_CLUSTERING,
 478         .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 479         .ioctl                  = hpsa_ioctl,
 480         .slave_alloc            = hpsa_slave_alloc,
 481         .slave_destroy          = hpsa_slave_destroy,
 482 #ifdef CONFIG_COMPAT
 483         .compat_ioctl           = hpsa_compat_ioctl,
 484 #endif
 485         .sdev_attrs = hpsa_sdev_attrs,
 486         .shost_attrs = hpsa_shost_attrs,
 487 };
 488
 489
 490 /* Enqueuing and dequeuing functions for cmdlists. */
 491 static inline void addQ(struct list_head *list, struct CommandList *c)
 492 {
 493         list_add_tail(&c->list, list);
 494 }
 495
 496 static inline u32 next_command(struct ctlr_info *h)
 497 {
 498         u32 a;
 499
 500         if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
 501                 return h->access.command_completed(h);
 502
 503         if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
 504                 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
 505                 (h->reply_pool_head)++;
 506                 h->commands_outstanding--;
 507         } else {
 508                 a = FIFO_EMPTY;
 509         }
 510         /* Check for wraparound */
 511         if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
 512                 h->reply_pool_head = h->reply_pool;
 513                 h->reply_pool_wraparound ^= 1;
 514         }
 515         return a;
 516 }
 517
 518 /* set_performant_mode: Modify the tag for cciss performant
 519  * set bit 0 for pull model, bits 3-1 for block fetch
 520  * register number
 521  */
 522 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
 523 {
 524         if (likely(h->transMethod & CFGTBL_Trans_Performant))
 525                 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
 526 }
 527
 528 static void enqueue_cmd_and_start_io(struct ctlr_info *h,
 529         struct CommandList *c)
 530 {
 531         unsigned long flags;
 532
 533         set_performant_mode(h, c);
 534         spin_lock_irqsave(&h->lock, flags);
 535         addQ(&h->reqQ, c);
 536         h->Qdepth++;
 537         start_io(h);
 538         spin_unlock_irqrestore(&h->lock, flags);
 539 }
 540
 541 static inline void removeQ(struct CommandList *c)
 542 {
 543         if (WARN_ON(list_empty(&c->list)))
 544                 return;
 545         list_del_init(&c->list);
 546 }
 547
 548 static inline int is_hba_lunid(unsigned char scsi3addr[])
 549 {
 550         return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
 551 }
 552
 553 static inline int is_scsi_rev_5(struct ctlr_info *h)
 554 {
 555         if (!h->hba_inquiry_data)
 556                 return 0;
 557         if ((h->hba_inquiry_data[2] & 0x07) == 5)
 558                 return 1;
 559         return 0;
 560 }
 561
 562 static int hpsa_find_target_lun(struct ctlr_info *h,
 563         unsigned char scsi3addr[], int bus, int *target, int *lun)
 564 {
 565         /* finds an unused bus, target, lun for a new physical device
 566          * assumes h->devlock is held
 567          */
 568         int i, found = 0;
 569         DECLARE_BITMAP(lun_taken, HPSA_MAX_SCSI_DEVS_PER_HBA);
 570
 571         memset(&lun_taken[0], 0, HPSA_MAX_SCSI_DEVS_PER_HBA >> 3);
 572
 573         for (i = 0; i < h->ndevices; i++) {
 574                 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
 575                         set_bit(h->dev[i]->target, lun_taken);
 576         }
 577
 578         for (i = 0; i < HPSA_MAX_SCSI_DEVS_PER_HBA; i++) {
 579                 if (!test_bit(i, lun_taken)) {
 580                         /* *bus = 1; */
 581                         *target = i;
 582                         *lun = 0;
 583                         found = 1;
 584                         break;
 585                 }
 586         }
 587         return !found;
 588 }
 589
 590 /* Add an entry into h->dev[] array. */
 591 static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
 592                 struct hpsa_scsi_dev_t *device,
 593                 struct hpsa_scsi_dev_t *added[], int *nadded)
 594 {
 595         /* assumes h->devlock is held */
 596         int n = h->ndevices;
 597         int i;
 598         unsigned char addr1[8], addr2[8];
 599         struct hpsa_scsi_dev_t *sd;
 600
 601         if (n >= HPSA_MAX_SCSI_DEVS_PER_HBA) {
 602                 dev_err(&h->pdev->dev, "too many devices, some will be "
 603                         "inaccessible.\n");
 604                 return -1;
 605         }
 606
 607         /* physical devices do not have lun or target assigned until now. */
 608         if (device->lun != -1)
 609                 /* Logical device, lun is already assigned. */
 610                 goto lun_assigned;
 611
 612         /* If this device a non-zero lun of a multi-lun device
 613          * byte 4 of the 8-byte LUN addr will contain the logical
 614          * unit no, zero otherise.
 615          */
 616         if (device->scsi3addr[4] == 0) {
 617                 /* This is not a non-zero lun of a multi-lun device */
 618                 if (hpsa_find_target_lun(h, device->scsi3addr,
 619                         device->bus, &device->target, &device->lun) != 0)
 620                         return -1;
 621                 goto lun_assigned;
 622         }
 623
 624         /* This is a non-zero lun of a multi-lun device.
 625          * Search through our list and find the device which
 626          * has the same 8 byte LUN address, excepting byte 4.
 627          * Assign the same bus and target for this new LUN.
 628          * Use the logical unit number from the firmware.
 629          */
 630         memcpy(addr1, device->scsi3addr, 8);
 631         addr1[4] = 0;
 632         for (i = 0; i < n; i++) {
 633                 sd = h->dev[i];
 634                 memcpy(addr2, sd->scsi3addr, 8);
 635                 addr2[4] = 0;
 636                 /* differ only in byte 4? */
 637                 if (memcmp(addr1, addr2, 8) == 0) {
 638                         device->bus = sd->bus;
 639                         device->target = sd->target;
 640                         device->lun = device->scsi3addr[4];
 641                         break;
 642                 }
 643         }
 644         if (device->lun == -1) {
 645                 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
 646                         " suspect firmware bug or unsupported hardware "
 647                         "configuration.\n");
 648                         return -1;
 649         }
 650
 651 lun_assigned:
 652
 653         h->dev[n] = device;
 654         h->ndevices++;
 655         added[*nadded] = device;
 656         (*nadded)++;
 657
 658         /* initially, (before registering with scsi layer) we don't
 659          * know our hostno and we don't want to print anything first
 660          * time anyway (the scsi layer's inquiries will show that info)
 661          */
 662         /* if (hostno != -1) */
 663                 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
 664                         scsi_device_type(device->devtype), hostno,
 665                         device->bus, device->target, device->lun);
 666         return 0;
 667 }
 668
 669 /* Replace an entry from h->dev[] array. */
 670 static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
 671         int entry, struct hpsa_scsi_dev_t *new_entry,
 672         struct hpsa_scsi_dev_t *added[], int *nadded,
 673         struct hpsa_scsi_dev_t *removed[], int *nremoved)
 674 {
 675         /* assumes h->devlock is held */
 676         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
 677         removed[*nremoved] = h->dev[entry];
 678         (*nremoved)++;
 679         h->dev[entry] = new_entry;
 680         added[*nadded] = new_entry;
 681         (*nadded)++;
 682         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
 683                 scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
 684                         new_entry->target, new_entry->lun);
 685 }
 686
 687 /* Remove an entry from h->dev[] array. */
 688 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
 689         struct hpsa_scsi_dev_t *removed[], int *nremoved)
 690 {
 691         /* assumes h->devlock is held */
 692         int i;
 693         struct hpsa_scsi_dev_t *sd;
 694
 695         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
 696
 697         sd = h->dev[entry];
 698         removed[*nremoved] = h->dev[entry];
 699         (*nremoved)++;
 700
 701         for (i = entry; i < h->ndevices-1; i++)
 702                 h->dev[i] = h->dev[i+1];
 703         h->ndevices--;
 704         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
 705                 scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
 706                 sd->lun);
 707 }
 708
 709 #define SCSI3ADDR_EQ(a, b) ( \
 710         (a)[7] == (b)[7] && \
 711         (a)[6] == (b)[6] && \
 712         (a)[5] == (b)[5] && \
 713         (a)[4] == (b)[4] && \
 714         (a)[3] == (b)[3] && \
 715         (a)[2] == (b)[2] && \
 716         (a)[1] == (b)[1] && \
 717         (a)[0] == (b)[0])
 718
 719 static void fixup_botched_add(struct ctlr_info *h,
 720         struct hpsa_scsi_dev_t *added)
 721 {
 722         /* called when scsi_add_device fails in order to re-adjust
 723          * h->dev[] to match the mid layer's view.
 724          */
 725         unsigned long flags;
 726         int i, j;
 727
 728         spin_lock_irqsave(&h->lock, flags);
 729         for (i = 0; i < h->ndevices; i++) {
 730                 if (h->dev[i] == added) {
 731                         for (j = i; j < h->ndevices-1; j++)
 732                                 h->dev[j] = h->dev[j+1];
 733                         h->ndevices--;
 734                         break;
 735                 }
 736         }
 737         spin_unlock_irqrestore(&h->lock, flags);
 738         kfree(added);
 739 }
 740
 741 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
 742         struct hpsa_scsi_dev_t *dev2)
 743 {
 744         /* we compare everything except lun and target as these
 745          * are not yet assigned.  Compare parts likely
 746          * to differ first
 747          */
 748         if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
 749                 sizeof(dev1->scsi3addr)) != 0)
 750                 return 0;
 751         if (memcmp(dev1->device_id, dev2->device_id,
 752                 sizeof(dev1->device_id)) != 0)
 753                 return 0;
 754         if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
 755                 return 0;
 756         if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
 757                 return 0;
 758         if (dev1->devtype != dev2->devtype)
 759                 return 0;
 760         if (dev1->bus != dev2->bus)
 761                 return 0;
 762         return 1;
 763 }
 764
 765 /* Find needle in haystack.  If exact match found, return DEVICE_SAME,
 766  * and return needle location in *index.  If scsi3addr matches, but not
 767  * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
 768  * location in *index.  If needle not found, return DEVICE_NOT_FOUND.
 769  */
 770 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
 771         struct hpsa_scsi_dev_t *haystack[], int haystack_size,
 772         int *index)
 773 {
 774         int i;
 775 #define DEVICE_NOT_FOUND 0
 776 #define DEVICE_CHANGED 1
 777 #define DEVICE_SAME 2
 778         for (i = 0; i < haystack_size; i++) {
 779                 if (haystack[i] == NULL) /* previously removed. */
 780                         continue;
 781                 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
 782                         *index = i;
 783                         if (device_is_the_same(needle, haystack[i]))
 784                                 return DEVICE_SAME;
 785                         else
 786                                 return DEVICE_CHANGED;
 787                 }
 788         }
 789         *index = -1;
 790         return DEVICE_NOT_FOUND;
 791 }
 792
 793 static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
 794         struct hpsa_scsi_dev_t *sd[], int nsds)
 795 {
 796         /* sd contains scsi3 addresses and devtypes, and inquiry
 797          * data.  This function takes what's in sd to be the current
 798          * reality and updates h->dev[] to reflect that reality.
 799          */
 800         int i, entry, device_change, changes = 0;
 801         struct hpsa_scsi_dev_t *csd;
 802         unsigned long flags;
 803         struct hpsa_scsi_dev_t **added, **removed;
 804         int nadded, nremoved;
 805         struct Scsi_Host *sh = NULL;
 806
 807         added = kzalloc(sizeof(*added) * HPSA_MAX_SCSI_DEVS_PER_HBA,
 808                 GFP_KERNEL);
 809         removed = kzalloc(sizeof(*removed) * HPSA_MAX_SCSI_DEVS_PER_HBA,
 810                 GFP_KERNEL);
 811
 812         if (!added || !removed) {
 813                 dev_warn(&h->pdev->dev, "out of memory in "
 814                         "adjust_hpsa_scsi_table\n");
 815                 goto free_and_out;
 816         }
 817
 818         spin_lock_irqsave(&h->devlock, flags);
 819
 820         /* find any devices in h->dev[] that are not in
 821          * sd[] and remove them from h->dev[], and for any
 822          * devices which have changed, remove the old device
 823          * info and add the new device info.
 824          */
 825         i = 0;
 826         nremoved = 0;
 827         nadded = 0;
 828         while (i < h->ndevices) {
 829                 csd = h->dev[i];
 830                 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
 831                 if (device_change == DEVICE_NOT_FOUND) {
 832                         changes++;
 833                         hpsa_scsi_remove_entry(h, hostno, i,
 834                                 removed, &nremoved);
 835                         continue; /* remove ^^^, hence i not incremented */
 836                 } else if (device_change == DEVICE_CHANGED) {
 837                         changes++;
 838                         hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
 839                                 added, &nadded, removed, &nremoved);
 840                         /* Set it to NULL to prevent it from being freed
 841                          * at the bottom of hpsa_update_scsi_devices()
 842                          */
 843                         sd[entry] = NULL;
 844                 }
 845                 i++;
 846         }
 847
 848         /* Now, make sure every device listed in sd[] is also
 849          * listed in h->dev[], adding them if they aren't found
 850          */
 851
 852         for (i = 0; i < nsds; i++) {
 853                 if (!sd[i]) /* if already added above. */
 854                         continue;
 855                 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
 856                                         h->ndevices, &entry);
 857                 if (device_change == DEVICE_NOT_FOUND) {
 858                         changes++;
 859                         if (hpsa_scsi_add_entry(h, hostno, sd[i],
 860                                 added, &nadded) != 0)
 861                                 break;
 862                         sd[i] = NULL; /* prevent from being freed later. */
 863                 } else if (device_change == DEVICE_CHANGED) {
 864                         /* should never happen... */
 865                         changes++;
 866                         dev_warn(&h->pdev->dev,
 867                                 "device unexpectedly changed.\n");
 868                         /* but if it does happen, we just ignore that device */
 869                 }
 870         }
 871         spin_unlock_irqrestore(&h->devlock, flags);
 872
 873         /* Don't notify scsi mid layer of any changes the first time through
 874          * (or if there are no changes) scsi_scan_host will do it later the
 875          * first time through.
 876          */
 877         if (hostno == -1 || !changes)
 878                 goto free_and_out;
 879
 880         sh = h->scsi_host;
 881         /* Notify scsi mid layer of any removed devices */
 882         for (i = 0; i < nremoved; i++) {
 883                 struct scsi_device *sdev =
 884                         scsi_device_lookup(sh, removed[i]->bus,
 885                                 removed[i]->target, removed[i]->lun);
 886                 if (sdev != NULL) {
 887                         scsi_remove_device(sdev);
 888                         scsi_device_put(sdev);
 889                 } else {
 890                         /* We don't expect to get here.
 891                          * future cmds to this device will get selection
 892                          * timeout as if the device was gone.
 893                          */
 894                         dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
 895                                 " for removal.", hostno, removed[i]->bus,
 896                                 removed[i]->target, removed[i]->lun);
 897                 }
 898                 kfree(removed[i]);
 899                 removed[i] = NULL;
 900         }
 901
 902         /* Notify scsi mid layer of any added devices */
 903         for (i = 0; i < nadded; i++) {
 904                 if (scsi_add_device(sh, added[i]->bus,
 905                         added[i]->target, added[i]->lun) == 0)
 906                         continue;
 907                 dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
 908                         "device not added.\n", hostno, added[i]->bus,
 909                         added[i]->target, added[i]->lun);
 910                 /* now we have to remove it from h->dev,
 911                  * since it didn't get added to scsi mid layer
 912                  */
 913                 fixup_botched_add(h, added[i]);
 914         }
 915
 916 free_and_out:
 917         kfree(added);
 918         kfree(removed);
 919 }
 920
 921 /*
 922  * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
 923  * Assume's h->devlock is held.
 924  */
 925 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
 926         int bus, int target, int lun)
 927 {
 928         int i;
 929         struct hpsa_scsi_dev_t *sd;
 930
 931         for (i = 0; i < h->ndevices; i++) {
 932                 sd = h->dev[i];
 933                 if (sd->bus == bus && sd->target == target && sd->lun == lun)
 934                         return sd;
 935         }
 936         return NULL;
 937 }
 938
 939 /* link sdev->hostdata to our per-device structure. */
 940 static int hpsa_slave_alloc(struct scsi_device *sdev)
 941 {
 942         struct hpsa_scsi_dev_t *sd;
 943         unsigned long flags;
 944         struct ctlr_info *h;
 945
 946         h = sdev_to_hba(sdev);
 947         spin_lock_irqsave(&h->devlock, flags);
 948         sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
 949                 sdev_id(sdev), sdev->lun);
 950         if (sd != NULL)
 951                 sdev->hostdata = sd;
 952         spin_unlock_irqrestore(&h->devlock, flags);
 953         return 0;
 954 }
 955
 956 static void hpsa_slave_destroy(struct scsi_device *sdev)
 957 {
 958         /* nothing to do. */
 959 }
 960
 961 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
 962 {
 963         int i;
 964
 965         if (!h->cmd_sg_list)
 966                 return;
 967         for (i = 0; i < h->nr_cmds; i++) {
 968                 kfree(h->cmd_sg_list[i]);
 969                 h->cmd_sg_list[i] = NULL;
 970         }
 971         kfree(h->cmd_sg_list);
 972         h->cmd_sg_list = NULL;
 973 }
 974
 975 static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
 976 {
 977         int i;
 978
 979         if (h->chainsize <= 0)
 980                 return 0;
 981
 982         h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
 983                                 GFP_KERNEL);
 984         if (!h->cmd_sg_list)
 985                 return -ENOMEM;
 986         for (i = 0; i < h->nr_cmds; i++) {
 987                 h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
 988                                                 h->chainsize, GFP_KERNEL);
 989                 if (!h->cmd_sg_list[i])
 990                         goto clean;
 991         }
 992         return 0;
 993
 994 clean:
 995         hpsa_free_sg_chain_blocks(h);
 996         return -ENOMEM;
 997 }
 998
 999 static void hpsa_map_sg_chain_block(struct ctlr_info *h,
1000         struct CommandList *c)
1001 {
1002         struct SGDescriptor *chain_sg, *chain_block;
1003         u64 temp64;
1004
1005         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1006         chain_block = h->cmd_sg_list[c->cmdindex];
1007         chain_sg->Ext = HPSA_SG_CHAIN;
1008         chain_sg->Len = sizeof(*chain_sg) *
1009                 (c->Header.SGTotal - h->max_cmd_sg_entries);
1010         temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
1011                                 PCI_DMA_TODEVICE);
1012         chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
1013         chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
1014 }
1015
1016 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
1017         struct CommandList *c)
1018 {
1019         struct SGDescriptor *chain_sg;
1020         union u64bit temp64;
1021
1022         if (c->Header.SGTotal <= h->max_cmd_sg_entries)
1023                 return;
1024
1025         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1026         temp64.val32.lower = chain_sg->Addr.lower;
1027         temp64.val32.upper = chain_sg->Addr.upper;
1028         pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
1029 }
1030
1031 static void complete_scsi_command(struct CommandList *cp)
1032 {
1033         struct scsi_cmnd *cmd;
1034         struct ctlr_info *h;
1035         struct ErrorInfo *ei;
1036
1037         unsigned char sense_key;
1038         unsigned char asc;      /* additional sense code */
1039         unsigned char ascq;     /* additional sense code qualifier */
1040         unsigned long sense_data_size;
1041
1042         ei = cp->err_info;
1043         cmd = (struct scsi_cmnd *) cp->scsi_cmd;
1044         h = cp->h;
1045
1046         scsi_dma_unmap(cmd); /* undo the DMA mappings */
1047         if (cp->Header.SGTotal > h->max_cmd_sg_entries)
1048                 hpsa_unmap_sg_chain_block(h, cp);
1049
1050         cmd->result = (DID_OK << 16);           /* host byte */
1051         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
1052         cmd->result |= ei->ScsiStatus;
1053
1054         /* copy the sense data whether we need to or not. */
1055         if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
1056                 sense_data_size = SCSI_SENSE_BUFFERSIZE;
1057         else
1058                 sense_data_size = sizeof(ei->SenseInfo);
1059         if (ei->SenseLen < sense_data_size)
1060                 sense_data_size = ei->SenseLen;
1061
1062         memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
1063         scsi_set_resid(cmd, ei->ResidualCnt);
1064
1065         if (ei->CommandStatus == 0) {
1066                 cmd->scsi_done(cmd);
1067                 cmd_free(h, cp);
1068                 return;
1069         }
1070
1071         /* an error has occurred */
1072         switch (ei->CommandStatus) {
1073
1074         case CMD_TARGET_STATUS:
1075                 if (ei->ScsiStatus) {
1076                         /* Get sense key */
1077                         sense_key = 0xf & ei->SenseInfo[2];
1078                         /* Get additional sense code */
1079                         asc = ei->SenseInfo[12];
1080                         /* Get addition sense code qualifier */
1081                         ascq = ei->SenseInfo[13];
1082                 }
1083
1084                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1085                         if (check_for_unit_attention(h, cp)) {
1086                                 cmd->result = DID_SOFT_ERROR << 16;
1087                                 break;
1088                         }
1089                         if (sense_key == ILLEGAL_REQUEST) {
1090                                 /*
1091                                  * SCSI REPORT_LUNS is commonly unsupported on
1092                                  * Smart Array.  Suppress noisy complaint.
1093                                  */
1094                                 if (cp->Request.CDB[0] == REPORT_LUNS)
1095                                         break;
1096
1097                                 /* If ASC/ASCQ indicate Logical Unit
1098                                  * Not Supported condition,
1099                                  */
1100                                 if ((asc == 0x25) && (ascq == 0x0)) {
1101                                         dev_warn(&h->pdev->dev, "cp %p "
1102                                                 "has check condition\n", cp);
1103                                         break;
1104                                 }
1105                         }
1106
1107                         if (sense_key == NOT_READY) {
1108                                 /* If Sense is Not Ready, Logical Unit
1109                                  * Not ready, Manual Intervention
1110                                  * required
1111                                  */
1112                                 if ((asc == 0x04) && (ascq == 0x03)) {
1113                                         dev_warn(&h->pdev->dev, "cp %p "
1114                                                 "has check condition: unit "
1115                                                 "not ready, manual "
1116                                                 "intervention required\n", cp);
1117                                         break;
1118                                 }
1119                         }
1120                         if (sense_key == ABORTED_COMMAND) {
1121                                 /* Aborted command is retryable */
1122                                 dev_warn(&h->pdev->dev, "cp %p "
1123                                         "has check condition: aborted command: "
1124                                         "ASC: 0x%x, ASCQ: 0x%x\n",
1125                                         cp, asc, ascq);
1126                                 cmd->result = DID_SOFT_ERROR << 16;
1127                                 break;
1128                         }
1129                         /* Must be some other type of check condition */
1130                         dev_warn(&h->pdev->dev, "cp %p has check condition: "
1131                                         "unknown type: "
1132                                         "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1133                                         "Returning result: 0x%x, "
1134                                         "cmd=[%02x %02x %02x %02x %02x "
1135                                         "%02x %02x %02x %02x %02x %02x "
1136                                         "%02x %02x %02x %02x %02x]\n",
1137                                         cp, sense_key, asc, ascq,
1138                                         cmd->result,
1139                                         cmd->cmnd[0], cmd->cmnd[1],
1140                                         cmd->cmnd[2], cmd->cmnd[3],
1141                                         cmd->cmnd[4], cmd->cmnd[5],
1142                                         cmd->cmnd[6], cmd->cmnd[7],
1143                                         cmd->cmnd[8], cmd->cmnd[9],
1144                                         cmd->cmnd[10], cmd->cmnd[11],
1145                                         cmd->cmnd[12], cmd->cmnd[13],
1146                                         cmd->cmnd[14], cmd->cmnd[15]);
1147                         break;
1148                 }
1149
1150
1151                 /* Problem was not a check condition
1152                  * Pass it up to the upper layers...
1153                  */
1154                 if (ei->ScsiStatus) {
1155                         dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1156                                 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1157                                 "Returning result: 0x%x\n",
1158                                 cp, ei->ScsiStatus,
1159                                 sense_key, asc, ascq,
1160                                 cmd->result);
1161                 } else {  /* scsi status is zero??? How??? */
1162                         dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1163                                 "Returning no connection.\n", cp),
1164
1165                         /* Ordinarily, this case should never happen,
1166                          * but there is a bug in some released firmware
1167                          * revisions that allows it to happen if, for
1168                          * example, a 4100 backplane loses power and
1169                          * the tape drive is in it.  We assume that
1170                          * it's a fatal error of some kind because we
1171                          * can't show that it wasn't. We will make it
1172                          * look like selection timeout since that is
1173                          * the most common reason for this to occur,
1174                          * and it's severe enough.
1175                          */
1176
1177                         cmd->result = DID_NO_CONNECT << 16;
1178                 }
1179                 break;
1180
1181         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1182                 break;
1183         case CMD_DATA_OVERRUN:
1184                 dev_warn(&h->pdev->dev, "cp %p has"
1185                         " completed with data overrun "
1186                         "reported\n", cp);
1187                 break;
1188         case CMD_INVALID: {
1189                 /* print_bytes(cp, sizeof(*cp), 1, 0);
1190                 print_cmd(cp); */
1191                 /* We get CMD_INVALID if you address a non-existent device
1192                  * instead of a selection timeout (no response).  You will
1193                  * see this if you yank out a drive, then try to access it.
1194                  * This is kind of a shame because it means that any other
1195                  * CMD_INVALID (e.g. driver bug) will get interpreted as a
1196                  * missing target. */
1197                 cmd->result = DID_NO_CONNECT << 16;
1198         }
1199                 break;
1200         case CMD_PROTOCOL_ERR:
1201                 dev_warn(&h->pdev->dev, "cp %p has "
1202                         "protocol error \n", cp);
1203                 break;
1204         case CMD_HARDWARE_ERR:
1205                 cmd->result = DID_ERROR << 16;
1206                 dev_warn(&h->pdev->dev, "cp %p had  hardware error\n", cp);
1207                 break;
1208         case CMD_CONNECTION_LOST:
1209                 cmd->result = DID_ERROR << 16;
1210                 dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1211                 break;
1212         case CMD_ABORTED:
1213                 cmd->result = DID_ABORT << 16;
1214                 dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1215                                 cp, ei->ScsiStatus);
1216                 break;
1217         case CMD_ABORT_FAILED:
1218                 cmd->result = DID_ERROR << 16;
1219                 dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1220                 break;
1221         case CMD_UNSOLICITED_ABORT:
1222                 cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
1223                 dev_warn(&h->pdev->dev, "cp %p aborted due to an unsolicited "
1224                         "abort\n", cp);
1225                 break;
1226         case CMD_TIMEOUT:
1227                 cmd->result = DID_TIME_OUT << 16;
1228                 dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1229                 break;
1230         case CMD_UNABORTABLE:
1231                 cmd->result = DID_ERROR << 16;
1232                 dev_warn(&h->pdev->dev, "Command unabortable\n");
1233                 break;
1234         default:
1235                 cmd->result = DID_ERROR << 16;
1236                 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1237                                 cp, ei->CommandStatus);
1238         }
1239         cmd->scsi_done(cmd);
1240         cmd_free(h, cp);
1241 }
1242
1243 static int hpsa_scsi_detect(struct ctlr_info *h)
1244 {
1245         struct Scsi_Host *sh;
1246         int error;
1247
1248         sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
1249         if (sh == NULL)
1250                 goto fail;
1251
1252         sh->io_port = 0;
1253         sh->n_io_port = 0;
1254         sh->this_id = -1;
1255         sh->max_channel = 3;
1256         sh->max_cmd_len = MAX_COMMAND_SIZE;
1257         sh->max_lun = HPSA_MAX_LUN;
1258         sh->max_id = HPSA_MAX_LUN;
1259         sh->can_queue = h->nr_cmds;
1260         sh->cmd_per_lun = h->nr_cmds;
1261         sh->sg_tablesize = h->maxsgentries;
1262         h->scsi_host = sh;
1263         sh->hostdata[0] = (unsigned long) h;
1264         sh->irq = h->intr[h->intr_mode];
1265         sh->unique_id = sh->irq;
1266         error = scsi_add_host(sh, &h->pdev->dev);
1267         if (error)
1268                 goto fail_host_put;
1269         scsi_scan_host(sh);
1270         return 0;
1271
1272  fail_host_put:
1273         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_add_host"
1274                 " failed for controller %d\n", h->ctlr);
1275         scsi_host_put(sh);
1276         return error;
1277  fail:
1278         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_host_alloc"
1279                 " failed for controller %d\n", h->ctlr);
1280         return -ENOMEM;
1281 }
1282
1283 static void hpsa_pci_unmap(struct pci_dev *pdev,
1284         struct CommandList *c, int sg_used, int data_direction)
1285 {
1286         int i;
1287         union u64bit addr64;
1288
1289         for (i = 0; i < sg_used; i++) {
1290                 addr64.val32.lower = c->SG[i].Addr.lower;
1291                 addr64.val32.upper = c->SG[i].Addr.upper;
1292                 pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1293                         data_direction);
1294         }
1295 }
1296
1297 static void hpsa_map_one(struct pci_dev *pdev,
1298                 struct CommandList *cp,
1299                 unsigned char *buf,
1300                 size_t buflen,
1301                 int data_direction)
1302 {
1303         u64 addr64;
1304
1305         if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1306                 cp->Header.SGList = 0;
1307                 cp->Header.SGTotal = 0;
1308                 return;
1309         }
1310
1311         addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1312         cp->SG[0].Addr.lower =
1313           (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1314         cp->SG[0].Addr.upper =
1315           (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1316         cp->SG[0].Len = buflen;
1317         cp->Header.SGList = (u8) 1;   /* no. SGs contig in this cmd */
1318         cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1319 }
1320
1321 static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1322         struct CommandList *c)
1323 {
1324         DECLARE_COMPLETION_ONSTACK(wait);
1325
1326         c->waiting = &wait;
1327         enqueue_cmd_and_start_io(h, c);
1328         wait_for_completion(&wait);
1329 }
1330
1331 static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1332         struct CommandList *c, int data_direction)
1333 {
1334         int retry_count = 0;
1335
1336         do {
1337                 memset(c->err_info, 0, sizeof(*c->err_info));
1338                 hpsa_scsi_do_simple_cmd_core(h, c);
1339                 retry_count++;
1340         } while (check_for_unit_attention(h, c) && retry_count <= 3);
1341         hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1342 }
1343
1344 static void hpsa_scsi_interpret_error(struct CommandList *cp)
1345 {
1346         struct ErrorInfo *ei;
1347         struct device *d = &cp->h->pdev->dev;
1348
1349         ei = cp->err_info;
1350         switch (ei->CommandStatus) {
1351         case CMD_TARGET_STATUS:
1352                 dev_warn(d, "cmd %p has completed with errors\n", cp);
1353                 dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1354                                 ei->ScsiStatus);
1355                 if (ei->ScsiStatus == 0)
1356                         dev_warn(d, "SCSI status is abnormally zero.  "
1357                         "(probably indicates selection timeout "
1358                         "reported incorrectly due to a known "
1359                         "firmware bug, circa July, 2001.)\n");
1360                 break;
1361         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1362                         dev_info(d, "UNDERRUN\n");
1363                 break;
1364         case CMD_DATA_OVERRUN:
1365                 dev_warn(d, "cp %p has completed with data overrun\n", cp);
1366                 break;
1367         case CMD_INVALID: {
1368                 /* controller unfortunately reports SCSI passthru's
1369                  * to non-existent targets as invalid commands.
1370                  */
1371                 dev_warn(d, "cp %p is reported invalid (probably means "
1372                         "target device no longer present)\n", cp);
1373                 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1374                 print_cmd(cp);  */
1375                 }
1376                 break;
1377         case CMD_PROTOCOL_ERR:
1378                 dev_warn(d, "cp %p has protocol error \n", cp);
1379                 break;
1380         case CMD_HARDWARE_ERR:
1381                 /* cmd->result = DID_ERROR << 16; */
1382                 dev_warn(d, "cp %p had hardware error\n", cp);
1383                 break;
1384         case CMD_CONNECTION_LOST:
1385                 dev_warn(d, "cp %p had connection lost\n", cp);
1386                 break;
1387         case CMD_ABORTED:
1388                 dev_warn(d, "cp %p was aborted\n", cp);
1389                 break;
1390         case CMD_ABORT_FAILED:
1391                 dev_warn(d, "cp %p reports abort failed\n", cp);
1392                 break;
1393         case CMD_UNSOLICITED_ABORT:
1394                 dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1395                 break;
1396         case CMD_TIMEOUT:
1397                 dev_warn(d, "cp %p timed out\n", cp);
1398                 break;
1399         case CMD_UNABORTABLE:
1400                 dev_warn(d, "Command unabortable\n");
1401                 break;
1402         default:
1403                 dev_warn(d, "cp %p returned unknown status %x\n", cp,
1404                                 ei->CommandStatus);
1405         }
1406 }
1407
1408 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1409                         unsigned char page, unsigned char *buf,
1410                         unsigned char bufsize)
1411 {
1412         int rc = IO_OK;
1413         struct CommandList *c;
1414         struct ErrorInfo *ei;
1415
1416         c = cmd_special_alloc(h);
1417
1418         if (c == NULL) {                        /* trouble... */
1419                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1420                 return -ENOMEM;
1421         }
1422
1423         fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD);
1424         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1425         ei = c->err_info;
1426         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1427                 hpsa_scsi_interpret_error(c);
1428                 rc = -1;
1429         }
1430         cmd_special_free(h, c);
1431         return rc;
1432 }
1433
1434 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1435 {
1436         int rc = IO_OK;
1437         struct CommandList *c;
1438         struct ErrorInfo *ei;
1439
1440         c = cmd_special_alloc(h);
1441
1442         if (c == NULL) {                        /* trouble... */
1443                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1444                 return -ENOMEM;
1445         }
1446
1447         fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
1448         hpsa_scsi_do_simple_cmd_core(h, c);
1449         /* no unmap needed here because no data xfer. */
1450
1451         ei = c->err_info;
1452         if (ei->CommandStatus != 0) {
1453                 hpsa_scsi_interpret_error(c);
1454                 rc = -1;
1455         }
1456         cmd_special_free(h, c);
1457         return rc;
1458 }
1459
1460 static void hpsa_get_raid_level(struct ctlr_info *h,
1461         unsigned char *scsi3addr, unsigned char *raid_level)
1462 {
1463         int rc;
1464         unsigned char *buf;
1465
1466         *raid_level = RAID_UNKNOWN;
1467         buf = kzalloc(64, GFP_KERNEL);
1468         if (!buf)
1469                 return;
1470         rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1471         if (rc == 0)
1472                 *raid_level = buf[8];
1473         if (*raid_level > RAID_UNKNOWN)
1474                 *raid_level = RAID_UNKNOWN;
1475         kfree(buf);
1476         return;
1477 }
1478
1479 /* Get the device id from inquiry page 0x83 */
1480 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1481         unsigned char *device_id, int buflen)
1482 {
1483         int rc;
1484         unsigned char *buf;
1485
1486         if (buflen > 16)
1487                 buflen = 16;
1488         buf = kzalloc(64, GFP_KERNEL);
1489         if (!buf)
1490                 return -1;
1491         rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1492         if (rc == 0)
1493                 memcpy(device_id, &buf[8], buflen);
1494         kfree(buf);
1495         return rc != 0;
1496 }
1497
1498 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1499                 struct ReportLUNdata *buf, int bufsize,
1500                 int extended_response)
1501 {
1502         int rc = IO_OK;
1503         struct CommandList *c;
1504         unsigned char scsi3addr[8];
1505         struct ErrorInfo *ei;
1506
1507         c = cmd_special_alloc(h);
1508         if (c == NULL) {                        /* trouble... */
1509                 dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1510                 return -1;
1511         }
1512         /* address the controller */
1513         memset(scsi3addr, 0, sizeof(scsi3addr));
1514         fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1515                 buf, bufsize, 0, scsi3addr, TYPE_CMD);
1516         if (extended_response)
1517                 c->Request.CDB[1] = extended_response;
1518         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1519         ei = c->err_info;
1520         if (ei->CommandStatus != 0 &&
1521             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1522                 hpsa_scsi_interpret_error(c);
1523                 rc = -1;
1524         }
1525         cmd_special_free(h, c);
1526         return rc;
1527 }
1528
1529 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1530                 struct ReportLUNdata *buf,
1531                 int bufsize, int extended_response)
1532 {
1533         return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1534 }
1535
1536 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1537                 struct ReportLUNdata *buf, int bufsize)
1538 {
1539         return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1540 }
1541
1542 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1543         int bus, int target, int lun)
1544 {
1545         device->bus = bus;
1546         device->target = target;
1547         device->lun = lun;
1548 }
1549
1550 static int hpsa_update_device_info(struct ctlr_info *h,
1551         unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
1552         unsigned char *is_OBDR_device)
1553 {
1554
1555 #define OBDR_SIG_OFFSET 43
1556 #define OBDR_TAPE_SIG "$DR-10"
1557 #define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
1558 #define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
1559
1560         unsigned char *inq_buff;
1561         unsigned char *obdr_sig;
1562
1563         inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1564         if (!inq_buff)
1565                 goto bail_out;
1566
1567         /* Do an inquiry to the device to see what it is. */
1568         if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1569                 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1570                 /* Inquiry failed (msg printed already) */
1571                 dev_err(&h->pdev->dev,
1572                         "hpsa_update_device_info: inquiry failed\n");
1573                 goto bail_out;
1574         }
1575
1576         this_device->devtype = (inq_buff[0] & 0x1f);
1577         memcpy(this_device->scsi3addr, scsi3addr, 8);
1578         memcpy(this_device->vendor, &inq_buff[8],
1579                 sizeof(this_device->vendor));
1580         memcpy(this_device->model, &inq_buff[16],
1581                 sizeof(this_device->model));
1582         memset(this_device->device_id, 0,
1583                 sizeof(this_device->device_id));
1584         hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1585                 sizeof(this_device->device_id));
1586
1587         if (this_device->devtype == TYPE_DISK &&
1588                 is_logical_dev_addr_mode(scsi3addr))
1589                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1590         else
1591                 this_device->raid_level = RAID_UNKNOWN;
1592
1593         if (is_OBDR_device) {
1594                 /* See if this is a One-Button-Disaster-Recovery device
1595                  * by looking for "$DR-10" at offset 43 in inquiry data.
1596                  */
1597                 obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
1598                 *is_OBDR_device = (this_device->devtype == TYPE_ROM &&
1599                                         strncmp(obdr_sig, OBDR_TAPE_SIG,
1600                                                 OBDR_SIG_LEN) == 0);
1601         }
1602
1603         kfree(inq_buff);
1604         return 0;
1605
1606 bail_out:
1607         kfree(inq_buff);
1608         return 1;
1609 }
1610
1611 static unsigned char *msa2xxx_model[] = {
1612         "MSA2012",
1613         "MSA2024",
1614         "MSA2312",
1615         "MSA2324",
1616         "P2000 G3 SAS",
1617         NULL,
1618 };
1619
1620 static int is_msa2xxx(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1621 {
1622         int i;
1623
1624         for (i = 0; msa2xxx_model[i]; i++)
1625                 if (strncmp(device->model, msa2xxx_model[i],
1626                         strlen(msa2xxx_model[i])) == 0)
1627                         return 1;
1628         return 0;
1629 }
1630
1631 /* Helper function to assign bus, target, lun mapping of devices.
1632  * Puts non-msa2xxx logical volumes on bus 0, msa2xxx logical
1633  * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1634  * Logical drive target and lun are assigned at this time, but
1635  * physical device lun and target assignment are deferred (assigned
1636  * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1637  */
1638 static void figure_bus_target_lun(struct ctlr_info *h,
1639         u8 *lunaddrbytes, int *bus, int *target, int *lun,
1640         struct hpsa_scsi_dev_t *device)
1641 {
1642         u32 lunid;
1643
1644         if (is_logical_dev_addr_mode(lunaddrbytes)) {
1645                 /* logical device */
1646                 if (unlikely(is_scsi_rev_5(h))) {
1647                         /* p1210m, logical drives lun assignments
1648                          * match SCSI REPORT LUNS data.
1649                          */
1650                         lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1651                         *bus = 0;
1652                         *target = 0;
1653                         *lun = (lunid & 0x3fff) + 1;
1654                 } else {
1655                         /* not p1210m... */
1656                         lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1657                         if (is_msa2xxx(h, device)) {
1658                                 /* msa2xxx way, put logicals on bus 1
1659                                  * and match target/lun numbers box
1660                                  * reports.
1661                                  */
1662                                 *bus = 1;
1663                                 *target = (lunid >> 16) & 0x3fff;
1664                                 *lun = lunid & 0x00ff;
1665                         } else {
1666                                 /* Traditional smart array way. */
1667                                 *bus = 0;
1668                                 *lun = 0;
1669                                 *target = lunid & 0x3fff;
1670                         }
1671                 }
1672         } else {
1673                 /* physical device */
1674                 if (is_hba_lunid(lunaddrbytes))
1675                         if (unlikely(is_scsi_rev_5(h))) {
1676                                 *bus = 0; /* put p1210m ctlr at 0,0,0 */
1677                                 *target = 0;
1678                                 *lun = 0;
1679                                 return;
1680                         } else
1681                                 *bus = 3; /* traditional smartarray */
1682                 else
1683                         *bus = 2; /* physical disk */
1684                 *target = -1;
1685                 *lun = -1; /* we will fill these in later. */
1686         }
1687 }
1688
1689 /*
1690  * If there is no lun 0 on a target, linux won't find any devices.
1691  * For the MSA2xxx boxes, we have to manually detect the enclosure
1692  * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1693  * it for some reason.  *tmpdevice is the target we're adding,
1694  * this_device is a pointer into the current element of currentsd[]
1695  * that we're building up in update_scsi_devices(), below.
1696  * lunzerobits is a bitmap that tracks which targets already have a
1697  * lun 0 assigned.
1698  * Returns 1 if an enclosure was added, 0 if not.
1699  */
1700 static int add_msa2xxx_enclosure_device(struct ctlr_info *h,
1701         struct hpsa_scsi_dev_t *tmpdevice,
1702         struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1703         int bus, int target, int lun, unsigned long lunzerobits[],
1704         int *nmsa2xxx_enclosures)
1705 {
1706         unsigned char scsi3addr[8];
1707
1708         if (test_bit(target, lunzerobits))
1709                 return 0; /* There is already a lun 0 on this target. */
1710
1711         if (!is_logical_dev_addr_mode(lunaddrbytes))
1712                 return 0; /* It's the logical targets that may lack lun 0. */
1713
1714         if (!is_msa2xxx(h, tmpdevice))
1715                 return 0; /* It's only the MSA2xxx that have this problem. */
1716
1717         if (lun == 0) /* if lun is 0, then obviously we have a lun 0. */
1718                 return 0;
1719
1720         memset(scsi3addr, 0, 8);
1721         scsi3addr[3] = target;
1722         if (is_hba_lunid(scsi3addr))
1723                 return 0; /* Don't add the RAID controller here. */
1724
1725         if (is_scsi_rev_5(h))
1726                 return 0; /* p1210m doesn't need to do this. */
1727
1728 #define MAX_MSA2XXX_ENCLOSURES 32
1729         if (*nmsa2xxx_enclosures >= MAX_MSA2XXX_ENCLOSURES) {
1730                 dev_warn(&h->pdev->dev, "Maximum number of MSA2XXX "
1731                         "enclosures exceeded.  Check your hardware "
1732                         "configuration.");
1733                 return 0;
1734         }
1735
1736         if (hpsa_update_device_info(h, scsi3addr, this_device, NULL))
1737                 return 0;
1738         (*nmsa2xxx_enclosures)++;
1739         hpsa_set_bus_target_lun(this_device, bus, target, 0);
1740         set_bit(target, lunzerobits);
1741         return 1;
1742 }
1743
1744 /*
1745  * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
1746  * logdev.  The number of luns in physdev and logdev are returned in
1747  * *nphysicals and *nlogicals, respectively.
1748  * Returns 0 on success, -1 otherwise.
1749  */
1750 static int hpsa_gather_lun_info(struct ctlr_info *h,
1751         int reportlunsize,
1752         struct ReportLUNdata *physdev, u32 *nphysicals,
1753         struct ReportLUNdata *logdev, u32 *nlogicals)
1754 {
1755         if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1756                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1757                 return -1;
1758         }
1759         *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1760         if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1761                 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1762                         "  %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1763                         *nphysicals - HPSA_MAX_PHYS_LUN);
1764                 *nphysicals = HPSA_MAX_PHYS_LUN;
1765         }
1766         if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1767                 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1768                 return -1;
1769         }
1770         *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1771         /* Reject Logicals in excess of our max capability. */
1772         if (*nlogicals > HPSA_MAX_LUN) {
1773                 dev_warn(&h->pdev->dev,
1774                         "maximum logical LUNs (%d) exceeded.  "
1775                         "%d LUNs ignored.\n", HPSA_MAX_LUN,
1776                         *nlogicals - HPSA_MAX_LUN);
1777                         *nlogicals = HPSA_MAX_LUN;
1778         }
1779         if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1780                 dev_warn(&h->pdev->dev,
1781                         "maximum logical + physical LUNs (%d) exceeded. "
1782                         "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1783                         *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1784                 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1785         }
1786         return 0;
1787 }
1788
1789 u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
1790         int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
1791         struct ReportLUNdata *logdev_list)
1792 {
1793         /* Helper function, figure out where the LUN ID info is coming from
1794          * given index i, lists of physical and logical devices, where in
1795          * the list the raid controller is supposed to appear (first or last)
1796          */
1797
1798         int logicals_start = nphysicals + (raid_ctlr_position == 0);
1799         int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
1800
1801         if (i == raid_ctlr_position)
1802                 return RAID_CTLR_LUNID;
1803
1804         if (i < logicals_start)
1805                 return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];
1806
1807         if (i < last_device)
1808                 return &logdev_list->LUN[i - nphysicals -
1809                         (raid_ctlr_position == 0)][0];
1810         BUG();
1811         return NULL;
1812 }
1813
1814 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1815 {
1816         /* the idea here is we could get notified
1817          * that some devices have changed, so we do a report
1818          * physical luns and report logical luns cmd, and adjust
1819          * our list of devices accordingly.
1820          *
1821          * The scsi3addr's of devices won't change so long as the
1822          * adapter is not reset.  That means we can rescan and
1823          * tell which devices we already know about, vs. new
1824          * devices, vs.  disappearing devices.
1825          */
1826         struct ReportLUNdata *physdev_list = NULL;
1827         struct ReportLUNdata *logdev_list = NULL;
1828         u32 nphysicals = 0;
1829         u32 nlogicals = 0;
1830         u32 ndev_allocated = 0;
1831         struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1832         int ncurrent = 0;
1833         int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1834         int i, nmsa2xxx_enclosures, ndevs_to_allocate;
1835         int bus, target, lun;
1836         int raid_ctlr_position;
1837         DECLARE_BITMAP(lunzerobits, HPSA_MAX_TARGETS_PER_CTLR);
1838
1839         currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_SCSI_DEVS_PER_HBA,
1840                 GFP_KERNEL);
1841         physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1842         logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1843         tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1844
1845         if (!currentsd || !physdev_list || !logdev_list || !tmpdevice) {
1846                 dev_err(&h->pdev->dev, "out of memory\n");
1847                 goto out;
1848         }
1849         memset(lunzerobits, 0, sizeof(lunzerobits));
1850
1851         if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1852                         logdev_list, &nlogicals))
1853                 goto out;
1854
1855         /* We might see up to 32 MSA2xxx enclosures, actually 8 of them
1856          * but each of them 4 times through different paths.  The plus 1
1857          * is for the RAID controller.
1858          */
1859         ndevs_to_allocate = nphysicals + nlogicals + MAX_MSA2XXX_ENCLOSURES + 1;
1860
1861         /* Allocate the per device structures */
1862         for (i = 0; i < ndevs_to_allocate; i++) {
1863                 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1864                 if (!currentsd[i]) {
1865                         dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1866                                 __FILE__, __LINE__);
1867                         goto out;
1868                 }
1869                 ndev_allocated++;
1870         }
1871
1872         if (unlikely(is_scsi_rev_5(h)))
1873                 raid_ctlr_position = 0;
1874         else
1875                 raid_ctlr_position = nphysicals + nlogicals;
1876
1877         /* adjust our table of devices */
1878         nmsa2xxx_enclosures = 0;
1879         for (i = 0; i < nphysicals + nlogicals + 1; i++) {
1880                 u8 *lunaddrbytes, is_OBDR = 0;
1881
1882                 /* Figure out where the LUN ID info is coming from */
1883                 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
1884                         i, nphysicals, nlogicals, physdev_list, logdev_list);
1885                 /* skip masked physical devices. */
1886                 if (lunaddrbytes[3] & 0xC0 &&
1887                         i < nphysicals + (raid_ctlr_position == 0))
1888                         continue;
1889
1890                 /* Get device type, vendor, model, device id */
1891                 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
1892                                                         &is_OBDR))
1893                         continue; /* skip it if we can't talk to it. */
1894                 figure_bus_target_lun(h, lunaddrbytes, &bus, &target, &lun,
1895                         tmpdevice);
1896                 this_device = currentsd[ncurrent];
1897
1898                 /*
1899                  * For the msa2xxx boxes, we have to insert a LUN 0 which
1900                  * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
1901                  * is nonetheless an enclosure device there.  We have to
1902                  * present that otherwise linux won't find anything if
1903                  * there is no lun 0.
1904                  */
1905                 if (add_msa2xxx_enclosure_device(h, tmpdevice, this_device,
1906                                 lunaddrbytes, bus, target, lun, lunzerobits,
1907                                 &nmsa2xxx_enclosures)) {
1908                         ncurrent++;
1909                         this_device = currentsd[ncurrent];
1910                 }
1911
1912                 *this_device = *tmpdevice;
1913                 hpsa_set_bus_target_lun(this_device, bus, target, lun);
1914
1915                 switch (this_device->devtype) {
1916                 case TYPE_ROM:
1917                         /* We don't *really* support actual CD-ROM devices,
1918                          * just "One Button Disaster Recovery" tape drive
1919                          * which temporarily pretends to be a CD-ROM drive.
1920                          * So we check that the device is really an OBDR tape
1921                          * device by checking for "$DR-10" in bytes 43-48 of
1922                          * the inquiry data.
1923                          */
1924                         if (is_OBDR)
1925                                 ncurrent++;
1926                         break;
1927                 case TYPE_DISK:
1928                         if (i < nphysicals)
1929                                 break;
1930                         ncurrent++;
1931                         break;
1932                 case TYPE_TAPE:
1933                 case TYPE_MEDIUM_CHANGER:
1934                         ncurrent++;
1935                         break;
1936                 case TYPE_RAID:
1937                         /* Only present the Smartarray HBA as a RAID controller.
1938                          * If it's a RAID controller other than the HBA itself
1939                          * (an external RAID controller, MSA500 or similar)
1940                          * don't present it.
1941                          */
1942                         if (!is_hba_lunid(lunaddrbytes))
1943                                 break;
1944                         ncurrent++;
1945                         break;
1946                 default:
1947                         break;
1948                 }
1949                 if (ncurrent >= HPSA_MAX_SCSI_DEVS_PER_HBA)
1950                         break;
1951         }
1952         adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
1953 out:
1954         kfree(tmpdevice);
1955         for (i = 0; i < ndev_allocated; i++)
1956                 kfree(currentsd[i]);
1957         kfree(currentsd);
1958         kfree(physdev_list);
1959         kfree(logdev_list);
1960 }
1961
1962 /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1963  * dma mapping  and fills in the scatter gather entries of the
1964  * hpsa command, cp.
1965  */
1966 static int hpsa_scatter_gather(struct ctlr_info *h,
1967                 struct CommandList *cp,
1968                 struct scsi_cmnd *cmd)
1969 {
1970         unsigned int len;
1971         struct scatterlist *sg;
1972         u64 addr64;
1973         int use_sg, i, sg_index, chained;
1974         struct SGDescriptor *curr_sg;
1975
1976         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1977
1978         use_sg = scsi_dma_map(cmd);
1979         if (use_sg < 0)
1980                 return use_sg;
1981
1982         if (!use_sg)
1983                 goto sglist_finished;
1984
1985         curr_sg = cp->SG;
1986         chained = 0;
1987         sg_index = 0;
1988         scsi_for_each_sg(cmd, sg, use_sg, i) {
1989                 if (i == h->max_cmd_sg_entries - 1 &&
1990                         use_sg > h->max_cmd_sg_entries) {
1991                         chained = 1;
1992                         curr_sg = h->cmd_sg_list[cp->cmdindex];
1993                         sg_index = 0;
1994                 }
1995                 addr64 = (u64) sg_dma_address(sg);
1996                 len  = sg_dma_len(sg);
1997                 curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
1998                 curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
1999                 curr_sg->Len = len;
2000                 curr_sg->Ext = 0;  /* we are not chaining */
2001                 curr_sg++;
2002         }
2003
2004         if (use_sg + chained > h->maxSG)
2005                 h->maxSG = use_sg + chained;
2006
2007         if (chained) {
2008                 cp->Header.SGList = h->max_cmd_sg_entries;
2009                 cp->Header.SGTotal = (u16) (use_sg + 1);
2010                 hpsa_map_sg_chain_block(h, cp);
2011                 return 0;
2012         }
2013
2014 sglist_finished:
2015
2016         cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
2017         cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
2018         return 0;
2019 }
2020
2021
2022 static int hpsa_scsi_queue_command_lck(struct scsi_cmnd *cmd,
2023         void (*done)(struct scsi_cmnd *))
2024 {
2025         struct ctlr_info *h;
2026         struct hpsa_scsi_dev_t *dev;
2027         unsigned char scsi3addr[8];
2028         struct CommandList *c;
2029         unsigned long flags;
2030
2031         /* Get the ptr to our adapter structure out of cmd->host. */
2032         h = sdev_to_hba(cmd->device);
2033         dev = cmd->device->hostdata;
2034         if (!dev) {
2035                 cmd->result = DID_NO_CONNECT << 16;
2036                 done(cmd);
2037                 return 0;
2038         }
2039         memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
2040
2041         /* Need a lock as this is being allocated from the pool */
2042         spin_lock_irqsave(&h->lock, flags);
2043         c = cmd_alloc(h);
2044         spin_unlock_irqrestore(&h->lock, flags);
2045         if (c == NULL) {                        /* trouble... */
2046                 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2047                 return SCSI_MLQUEUE_HOST_BUSY;
2048         }
2049
2050         /* Fill in the command list header */
2051
2052         cmd->scsi_done = done;    /* save this for use by completion code */
2053
2054         /* save c in case we have to abort it  */
2055         cmd->host_scribble = (unsigned char *) c;
2056
2057         c->cmd_type = CMD_SCSI;
2058         c->scsi_cmd = cmd;
2059         c->Header.ReplyQueue = 0;  /* unused in simple mode */
2060         memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
2061         c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
2062         c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
2063
2064         /* Fill in the request block... */
2065
2066         c->Request.Timeout = 0;
2067         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
2068         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
2069         c->Request.CDBLen = cmd->cmd_len;
2070         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
2071         c->Request.Type.Type = TYPE_CMD;
2072         c->Request.Type.Attribute = ATTR_SIMPLE;
2073         switch (cmd->sc_data_direction) {
2074         case DMA_TO_DEVICE:
2075                 c->Request.Type.Direction = XFER_WRITE;
2076                 break;
2077         case DMA_FROM_DEVICE:
2078                 c->Request.Type.Direction = XFER_READ;
2079                 break;
2080         case DMA_NONE:
2081                 c->Request.Type.Direction = XFER_NONE;
2082                 break;
2083         case DMA_BIDIRECTIONAL:
2084                 /* This can happen if a buggy application does a scsi passthru
2085                  * and sets both inlen and outlen to non-zero. ( see
2086                  * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
2087                  */
2088
2089                 c->Request.Type.Direction = XFER_RSVD;
2090                 /* This is technically wrong, and hpsa controllers should
2091                  * reject it with CMD_INVALID, which is the most correct
2092                  * response, but non-fibre backends appear to let it
2093                  * slide by, and give the same results as if this field
2094                  * were set correctly.  Either way is acceptable for
2095                  * our purposes here.
2096                  */
2097
2098                 break;
2099
2100         default:
2101                 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
2102                         cmd->sc_data_direction);
2103                 BUG();
2104                 break;
2105         }
2106
2107         if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
2108                 cmd_free(h, c);
2109                 return SCSI_MLQUEUE_HOST_BUSY;
2110         }
2111         enqueue_cmd_and_start_io(h, c);
2112         /* the cmd'll come back via intr handler in complete_scsi_command()  */
2113         return 0;
2114 }
2115
2116 static DEF_SCSI_QCMD(hpsa_scsi_queue_command)
2117
2118 static void hpsa_scan_start(struct Scsi_Host *sh)
2119 {
2120         struct ctlr_info *h = shost_to_hba(sh);
2121         unsigned long flags;
2122
2123         /* wait until any scan already in progress is finished. */
2124         while (1) {
2125                 spin_lock_irqsave(&h->scan_lock, flags);
2126                 if (h->scan_finished)
2127                         break;
2128                 spin_unlock_irqrestore(&h->scan_lock, flags);
2129                 wait_event(h->scan_wait_queue, h->scan_finished);
2130                 /* Note: We don't need to worry about a race between this
2131                  * thread and driver unload because the midlayer will
2132                  * have incremented the reference count, so unload won't
2133                  * happen if we're in here.
2134                  */
2135         }
2136         h->scan_finished = 0; /* mark scan as in progress */
2137         spin_unlock_irqrestore(&h->scan_lock, flags);
2138
2139         hpsa_update_scsi_devices(h, h->scsi_host->host_no);
2140
2141         spin_lock_irqsave(&h->scan_lock, flags);
2142         h->scan_finished = 1; /* mark scan as finished. */
2143         wake_up_all(&h->scan_wait_queue);
2144         spin_unlock_irqrestore(&h->scan_lock, flags);
2145 }
2146
2147 static int hpsa_scan_finished(struct Scsi_Host *sh,
2148         unsigned long elapsed_time)
2149 {
2150         struct ctlr_info *h = shost_to_hba(sh);
2151         unsigned long flags;
2152         int finished;
2153
2154         spin_lock_irqsave(&h->scan_lock, flags);
2155         finished = h->scan_finished;
2156         spin_unlock_irqrestore(&h->scan_lock, flags);
2157         return finished;
2158 }
2159
2160 static int hpsa_change_queue_depth(struct scsi_device *sdev,
2161         int qdepth, int reason)
2162 {
2163         struct ctlr_info *h = sdev_to_hba(sdev);
2164
2165         if (reason != SCSI_QDEPTH_DEFAULT)
2166                 return -ENOTSUPP;
2167
2168         if (qdepth < 1)
2169                 qdepth = 1;
2170         else
2171                 if (qdepth > h->nr_cmds)
2172                         qdepth = h->nr_cmds;
2173         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
2174         return sdev->queue_depth;
2175 }
2176
2177 static void hpsa_unregister_scsi(struct ctlr_info *h)
2178 {
2179         /* we are being forcibly unloaded, and may not refuse. */
2180         scsi_remove_host(h->scsi_host);
2181         scsi_host_put(h->scsi_host);
2182         h->scsi_host = NULL;
2183 }
2184
2185 static int hpsa_register_scsi(struct ctlr_info *h)
2186 {
2187         int rc;
2188
2189         rc = hpsa_scsi_detect(h);
2190         if (rc != 0)
2191                 dev_err(&h->pdev->dev, "hpsa_register_scsi: failed"
2192                         " hpsa_scsi_detect(), rc is %d\n", rc);
2193         return rc;
2194 }
2195
2196 static int wait_for_device_to_become_ready(struct ctlr_info *h,
2197         unsigned char lunaddr[])
2198 {
2199         int rc = 0;
2200         int count = 0;
2201         int waittime = 1; /* seconds */
2202         struct CommandList *c;
2203
2204         c = cmd_special_alloc(h);
2205         if (!c) {
2206                 dev_warn(&h->pdev->dev, "out of memory in "
2207                         "wait_for_device_to_become_ready.\n");
2208                 return IO_ERROR;
2209         }
2210
2211         /* Send test unit ready until device ready, or give up. */
2212         while (count < HPSA_TUR_RETRY_LIMIT) {
2213
2214                 /* Wait for a bit.  do this first, because if we send
2215                  * the TUR right away, the reset will just abort it.
2216                  */
2217                 msleep(1000 * waittime);
2218                 count++;
2219
2220                 /* Increase wait time with each try, up to a point. */
2221                 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
2222                         waittime = waittime * 2;
2223
2224                 /* Send the Test Unit Ready */
2225                 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD);
2226                 hpsa_scsi_do_simple_cmd_core(h, c);
2227                 /* no unmap needed here because no data xfer. */
2228
2229                 if (c->err_info->CommandStatus == CMD_SUCCESS)
2230                         break;
2231
2232                 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2233                         c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
2234                         (c->err_info->SenseInfo[2] == NO_SENSE ||
2235                         c->err_info->SenseInfo[2] == UNIT_ATTENTION))
2236                         break;
2237
2238                 dev_warn(&h->pdev->dev, "waiting %d secs "
2239                         "for device to become ready.\n", waittime);
2240                 rc = 1; /* device not ready. */
2241         }
2242
2243         if (rc)
2244                 dev_warn(&h->pdev->dev, "giving up on device.\n");
2245         else
2246                 dev_warn(&h->pdev->dev, "device is ready.\n");
2247
2248         cmd_special_free(h, c);
2249         return rc;
2250 }
2251
2252 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
2253  * complaining.  Doing a host- or bus-reset can't do anything good here.
2254  */
2255 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
2256 {
2257         int rc;
2258         struct ctlr_info *h;
2259         struct hpsa_scsi_dev_t *dev;
2260
2261         /* find the controller to which the command to be aborted was sent */
2262         h = sdev_to_hba(scsicmd->device);
2263         if (h == NULL) /* paranoia */
2264                 return FAILED;
2265         dev = scsicmd->device->hostdata;
2266         if (!dev) {
2267                 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2268                         "device lookup failed.\n");
2269                 return FAILED;
2270         }
2271         dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
2272                 h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2273         /* send a reset to the SCSI LUN which the command was sent to */
2274         rc = hpsa_send_reset(h, dev->scsi3addr);
2275         if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2276                 return SUCCESS;
2277
2278         dev_warn(&h->pdev->dev, "resetting device failed.\n");
2279         return FAILED;
2280 }
2281
2282 /*
2283  * For operations that cannot sleep, a command block is allocated at init,
2284  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2285  * which ones are free or in use.  Lock must be held when calling this.
2286  * cmd_free() is the complement.
2287  */
2288 static struct CommandList *cmd_alloc(struct ctlr_info *h)
2289 {
2290         struct CommandList *c;
2291         int i;
2292         union u64bit temp64;
2293         dma_addr_t cmd_dma_handle, err_dma_handle;
2294
2295         do {
2296                 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2297                 if (i == h->nr_cmds)
2298                         return NULL;
2299         } while (test_and_set_bit
2300                  (i & (BITS_PER_LONG - 1),
2301                   h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2302         c = h->cmd_pool + i;
2303         memset(c, 0, sizeof(*c));
2304         cmd_dma_handle = h->cmd_pool_dhandle
2305             + i * sizeof(*c);
2306         c->err_info = h->errinfo_pool + i;
2307         memset(c->err_info, 0, sizeof(*c->err_info));
2308         err_dma_handle = h->errinfo_pool_dhandle
2309             + i * sizeof(*c->err_info);
2310         h->nr_allocs++;
2311
2312         c->cmdindex = i;
2313
2314         INIT_LIST_HEAD(&c->list);
2315         c->busaddr = (u32) cmd_dma_handle;
2316         temp64.val = (u64) err_dma_handle;
2317         c->ErrDesc.Addr.lower = temp64.val32.lower;
2318         c->ErrDesc.Addr.upper = temp64.val32.upper;
2319         c->ErrDesc.Len = sizeof(*c->err_info);
2320
2321         c->h = h;
2322         return c;
2323 }
2324
2325 /* For operations that can wait for kmalloc to possibly sleep,
2326  * this routine can be called. Lock need not be held to call
2327  * cmd_special_alloc. cmd_special_free() is the complement.
2328  */
2329 static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2330 {
2331         struct CommandList *c;
2332         union u64bit temp64;
2333         dma_addr_t cmd_dma_handle, err_dma_handle;
2334
2335         c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2336         if (c == NULL)
2337                 return NULL;
2338         memset(c, 0, sizeof(*c));
2339
2340         c->cmdindex = -1;
2341
2342         c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2343                     &err_dma_handle);
2344
2345         if (c->err_info == NULL) {
2346                 pci_free_consistent(h->pdev,
2347                         sizeof(*c), c, cmd_dma_handle);
2348                 return NULL;
2349         }
2350         memset(c->err_info, 0, sizeof(*c->err_info));
2351
2352         INIT_LIST_HEAD(&c->list);
2353         c->busaddr = (u32) cmd_dma_handle;
2354         temp64.val = (u64) err_dma_handle;
2355         c->ErrDesc.Addr.lower = temp64.val32.lower;
2356         c->ErrDesc.Addr.upper = temp64.val32.upper;
2357         c->ErrDesc.Len = sizeof(*c->err_info);
2358
2359         c->h = h;
2360         return c;
2361 }
2362
2363 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2364 {
2365         int i;
2366
2367         i = c - h->cmd_pool;
2368         clear_bit(i & (BITS_PER_LONG - 1),
2369                   h->cmd_pool_bits + (i / BITS_PER_LONG));
2370         h->nr_frees++;
2371 }
2372
2373 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2374 {
2375         union u64bit temp64;
2376
2377         temp64.val32.lower = c->ErrDesc.Addr.lower;
2378         temp64.val32.upper = c->ErrDesc.Addr.upper;
2379         pci_free_consistent(h->pdev, sizeof(*c->err_info),
2380                             c->err_info, (dma_addr_t) temp64.val);
2381         pci_free_consistent(h->pdev, sizeof(*c),
2382                             c, (dma_addr_t) (c->busaddr & DIRECT_LOOKUP_MASK));
2383 }
2384
2385 #ifdef CONFIG_COMPAT
2386
2387 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2388 {
2389         IOCTL32_Command_struct __user *arg32 =
2390             (IOCTL32_Command_struct __user *) arg;
2391         IOCTL_Command_struct arg64;
2392         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2393         int err;
2394         u32 cp;
2395
2396         memset(&arg64, 0, sizeof(arg64));
2397         err = 0;
2398         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2399                            sizeof(arg64.LUN_info));
2400         err |= copy_from_user(&arg64.Request, &arg32->Request,
2401                            sizeof(arg64.Request));
2402         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2403                            sizeof(arg64.error_info));
2404         err |= get_user(arg64.buf_size, &arg32->buf_size);
2405         err |= get_user(cp, &arg32->buf);
2406         arg64.buf = compat_ptr(cp);
2407         err |= copy_to_user(p, &arg64, sizeof(arg64));
2408
2409         if (err)
2410                 return -EFAULT;
2411
2412         err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2413         if (err)
2414                 return err;
2415         err |= copy_in_user(&arg32->error_info, &p->error_info,
2416                          sizeof(arg32->error_info));
2417         if (err)
2418                 return -EFAULT;
2419         return err;
2420 }
2421
2422 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2423         int cmd, void *arg)
2424 {
2425         BIG_IOCTL32_Command_struct __user *arg32 =
2426             (BIG_IOCTL32_Command_struct __user *) arg;
2427         BIG_IOCTL_Command_struct arg64;
2428         BIG_IOCTL_Command_struct __user *p =
2429             compat_alloc_user_space(sizeof(arg64));
2430         int err;
2431         u32 cp;
2432
2433         memset(&arg64, 0, sizeof(arg64));
2434         err = 0;
2435         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2436                            sizeof(arg64.LUN_info));
2437         err |= copy_from_user(&arg64.Request, &arg32->Request,
2438                            sizeof(arg64.Request));
2439         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2440                            sizeof(arg64.error_info));
2441         err |= get_user(arg64.buf_size, &arg32->buf_size);
2442         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2443         err |= get_user(cp, &arg32->buf);
2444         arg64.buf = compat_ptr(cp);
2445         err |= copy_to_user(p, &arg64, sizeof(arg64));
2446
2447         if (err)
2448                 return -EFAULT;
2449
2450         err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2451         if (err)
2452                 return err;
2453         err |= copy_in_user(&arg32->error_info, &p->error_info,
2454                          sizeof(arg32->error_info));
2455         if (err)
2456                 return -EFAULT;
2457         return err;
2458 }
2459
2460 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2461 {
2462         switch (cmd) {
2463         case CCISS_GETPCIINFO:
2464         case CCISS_GETINTINFO:
2465         case CCISS_SETINTINFO:
2466         case CCISS_GETNODENAME:
2467         case CCISS_SETNODENAME:
2468         case CCISS_GETHEARTBEAT:
2469         case CCISS_GETBUSTYPES:
2470         case CCISS_GETFIRMVER:
2471         case CCISS_GETDRIVVER:
2472         case CCISS_REVALIDVOLS:
2473         case CCISS_DEREGDISK:
2474         case CCISS_REGNEWDISK:
2475         case CCISS_REGNEWD:
2476         case CCISS_RESCANDISK:
2477         case CCISS_GETLUNINFO:
2478                 return hpsa_ioctl(dev, cmd, arg);
2479
2480         case CCISS_PASSTHRU32:
2481                 return hpsa_ioctl32_passthru(dev, cmd, arg);
2482         case CCISS_BIG_PASSTHRU32:
2483                 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2484
2485         default:
2486                 return -ENOIOCTLCMD;
2487         }
2488 }
2489 #endif
2490
2491 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2492 {
2493         struct hpsa_pci_info pciinfo;
2494
2495         if (!argp)
2496                 return -EINVAL;
2497         pciinfo.domain = pci_domain_nr(h->pdev->bus);
2498         pciinfo.bus = h->pdev->bus->number;
2499         pciinfo.dev_fn = h->pdev->devfn;
2500         pciinfo.board_id = h->board_id;
2501         if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2502                 return -EFAULT;
2503         return 0;
2504 }
2505
2506 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2507 {
2508         DriverVer_type DriverVer;
2509         unsigned char vmaj, vmin, vsubmin;
2510         int rc;
2511
2512         rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2513                 &vmaj, &vmin, &vsubmin);
2514         if (rc != 3) {
2515                 dev_info(&h->pdev->dev, "driver version string '%s' "
2516                         "unrecognized.", HPSA_DRIVER_VERSION);
2517                 vmaj = 0;
2518                 vmin = 0;
2519                 vsubmin = 0;
2520         }
2521         DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2522         if (!argp)
2523                 return -EINVAL;
2524         if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2525                 return -EFAULT;
2526         return 0;
2527 }
2528
2529 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2530 {
2531         IOCTL_Command_struct iocommand;
2532         struct CommandList *c;
2533         char *buff = NULL;
2534         union u64bit temp64;
2535
2536         if (!argp)
2537                 return -EINVAL;
2538         if (!capable(CAP_SYS_RAWIO))
2539                 return -EPERM;
2540         if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2541                 return -EFAULT;
2542         if ((iocommand.buf_size < 1) &&
2543             (iocommand.Request.Type.Direction != XFER_NONE)) {
2544                 return -EINVAL;
2545         }
2546         if (iocommand.buf_size > 0) {
2547                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2548                 if (buff == NULL)
2549                         return -EFAULT;
2550                 if (iocommand.Request.Type.Direction == XFER_WRITE) {
2551                         /* Copy the data into the buffer we created */
2552                         if (copy_from_user(buff, iocommand.buf,
2553                                 iocommand.buf_size)) {
2554                                 kfree(buff);
2555                                 return -EFAULT;
2556                         }
2557                 } else {
2558                         memset(buff, 0, iocommand.buf_size);
2559                 }
2560         }
2561         c = cmd_special_alloc(h);
2562         if (c == NULL) {
2563                 kfree(buff);
2564                 return -ENOMEM;
2565         }
2566         /* Fill in the command type */
2567         c->cmd_type = CMD_IOCTL_PEND;
2568         /* Fill in Command Header */
2569         c->Header.ReplyQueue = 0; /* unused in simple mode */
2570         if (iocommand.buf_size > 0) {   /* buffer to fill */
2571                 c->Header.SGList = 1;
2572                 c->Header.SGTotal = 1;
2573         } else  { /* no buffers to fill */
2574                 c->Header.SGList = 0;
2575                 c->Header.SGTotal = 0;
2576         }
2577         memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
2578         /* use the kernel address the cmd block for tag */
2579         c->Header.Tag.lower = c->busaddr;
2580
2581         /* Fill in Request block */
2582         memcpy(&c->Request, &iocommand.Request,
2583                 sizeof(c->Request));
2584
2585         /* Fill in the scatter gather information */
2586         if (iocommand.buf_size > 0) {
2587                 temp64.val = pci_map_single(h->pdev, buff,
2588                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
2589                 c->SG[0].Addr.lower = temp64.val32.lower;
2590                 c->SG[0].Addr.upper = temp64.val32.upper;
2591                 c->SG[0].Len = iocommand.buf_size;
2592                 c->SG[0].Ext = 0; /* we are not chaining*/
2593         }
2594         hpsa_scsi_do_simple_cmd_core(h, c);
2595         if (iocommand.buf_size > 0)
2596                 hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
2597         check_ioctl_unit_attention(h, c);
2598
2599         /* Copy the error information out */
2600         memcpy(&iocommand.error_info, c->err_info,
2601                 sizeof(iocommand.error_info));
2602         if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
2603                 kfree(buff);
2604                 cmd_special_free(h, c);
2605                 return -EFAULT;
2606         }
2607         if (iocommand.Request.Type.Direction == XFER_READ &&
2608                 iocommand.buf_size > 0) {
2609                 /* Copy the data out of the buffer we created */
2610                 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
2611                         kfree(buff);
2612                         cmd_special_free(h, c);
2613                         return -EFAULT;
2614                 }
2615         }
2616         kfree(buff);
2617         cmd_special_free(h, c);
2618         return 0;
2619 }
2620
2621 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2622 {
2623         BIG_IOCTL_Command_struct *ioc;
2624         struct CommandList *c;
2625         unsigned char **buff = NULL;
2626         int *buff_size = NULL;
2627         union u64bit temp64;
2628         BYTE sg_used = 0;
2629         int status = 0;
2630         int i;
2631         u32 left;
2632         u32 sz;
2633         BYTE __user *data_ptr;
2634
2635         if (!argp)
2636                 return -EINVAL;
2637         if (!capable(CAP_SYS_RAWIO))
2638                 return -EPERM;
2639         ioc = (BIG_IOCTL_Command_struct *)
2640             kmalloc(sizeof(*ioc), GFP_KERNEL);
2641         if (!ioc) {
2642                 status = -ENOMEM;
2643                 goto cleanup1;
2644         }
2645         if (copy_from_user(ioc, argp, sizeof(*ioc))) {
2646                 status = -EFAULT;
2647                 goto cleanup1;
2648         }
2649         if ((ioc->buf_size < 1) &&
2650             (ioc->Request.Type.Direction != XFER_NONE)) {
2651                 status = -EINVAL;
2652                 goto cleanup1;
2653         }
2654         /* Check kmalloc limits  using all SGs */
2655         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
2656                 status = -EINVAL;
2657                 goto cleanup1;
2658         }
2659         if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
2660                 status = -EINVAL;
2661                 goto cleanup1;
2662         }
2663         buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
2664         if (!buff) {
2665                 status = -ENOMEM;
2666                 goto cleanup1;
2667         }
2668         buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
2669         if (!buff_size) {
2670                 status = -ENOMEM;
2671                 goto cleanup1;
2672         }
2673         left = ioc->buf_size;
2674         data_ptr = ioc->buf;
2675         while (left) {
2676                 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
2677                 buff_size[sg_used] = sz;
2678                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
2679                 if (buff[sg_used] == NULL) {
2680                         status = -ENOMEM;
2681                         goto cleanup1;
2682                 }
2683                 if (ioc->Request.Type.Direction == XFER_WRITE) {
2684                         if (copy_from_user(buff[sg_used], data_ptr, sz)) {
2685                                 status = -ENOMEM;
2686                                 goto cleanup1;
2687                         }
2688                 } else
2689                         memset(buff[sg_used], 0, sz);
2690                 left -= sz;
2691                 data_ptr += sz;
2692                 sg_used++;
2693         }
2694         c = cmd_special_alloc(h);
2695         if (c == NULL) {
2696                 status = -ENOMEM;
2697                 goto cleanup1;
2698         }
2699         c->cmd_type = CMD_IOCTL_PEND;
2700         c->Header.ReplyQueue = 0;
2701         c->Header.SGList = c->Header.SGTotal = sg_used;
2702         memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
2703         c->Header.Tag.lower = c->busaddr;
2704         memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
2705         if (ioc->buf_size > 0) {
2706                 int i;
2707                 for (i = 0; i < sg_used; i++) {
2708                         temp64.val = pci_map_single(h->pdev, buff[i],
2709                                     buff_size[i], PCI_DMA_BIDIRECTIONAL);
2710                         c->SG[i].Addr.lower = temp64.val32.lower;
2711                         c->SG[i].Addr.upper = temp64.val32.upper;
2712                         c->SG[i].Len = buff_size[i];
2713                         /* we are not chaining */
2714                         c->SG[i].Ext = 0;
2715                 }
2716         }
2717         hpsa_scsi_do_simple_cmd_core(h, c);
2718         if (sg_used)
2719                 hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
2720         check_ioctl_unit_attention(h, c);
2721         /* Copy the error information out */
2722         memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
2723         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
2724                 cmd_special_free(h, c);
2725                 status = -EFAULT;
2726                 goto cleanup1;
2727         }
2728         if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) {
2729                 /* Copy the data out of the buffer we created */
2730                 BYTE __user *ptr = ioc->buf;
2731                 for (i = 0; i < sg_used; i++) {
2732                         if (copy_to_user(ptr, buff[i], buff_size[i])) {
2733                                 cmd_special_free(h, c);
2734                                 status = -EFAULT;
2735                                 goto cleanup1;
2736                         }
2737                         ptr += buff_size[i];
2738                 }
2739         }
2740         cmd_special_free(h, c);
2741         status = 0;
2742 cleanup1:
2743         if (buff) {
2744                 for (i = 0; i < sg_used; i++)
2745                         kfree(buff[i]);
2746                 kfree(buff);
2747         }
2748         kfree(buff_size);
2749         kfree(ioc);
2750         return status;
2751 }
2752
2753 static void check_ioctl_unit_attention(struct ctlr_info *h,
2754         struct CommandList *c)
2755 {
2756         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2757                         c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
2758                 (void) check_for_unit_attention(h, c);
2759 }
2760 /*
2761  * ioctl
2762  */
2763 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
2764 {
2765         struct ctlr_info *h;
2766         void __user *argp = (void __user *)arg;
2767
2768         h = sdev_to_hba(dev);
2769
2770         switch (cmd) {
2771         case CCISS_DEREGDISK:
2772         case CCISS_REGNEWDISK:
2773         case CCISS_REGNEWD:
2774                 hpsa_scan_start(h->scsi_host);
2775                 return 0;
2776         case CCISS_GETPCIINFO:
2777                 return hpsa_getpciinfo_ioctl(h, argp);
2778         case CCISS_GETDRIVVER:
2779                 return hpsa_getdrivver_ioctl(h, argp);
2780         case CCISS_PASSTHRU:
2781                 return hpsa_passthru_ioctl(h, argp);
2782         case CCISS_BIG_PASSTHRU:
2783                 return hpsa_big_passthru_ioctl(h, argp);
2784         default:
2785                 return -ENOTTY;
2786         }
2787 }
2788
2789 static int __devinit hpsa_send_host_reset(struct ctlr_info *h,
2790         unsigned char *scsi3addr, u8 reset_type)
2791 {
2792         struct CommandList *c;
2793
2794         c = cmd_alloc(h);
2795         if (!c)
2796                 return -ENOMEM;
2797         fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
2798                 RAID_CTLR_LUNID, TYPE_MSG);
2799         c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
2800         c->waiting = NULL;
2801         enqueue_cmd_and_start_io(h, c);
2802         /* Don't wait for completion, the reset won't complete.  Don't free
2803          * the command either.  This is the last command we will send before
2804          * re-initializing everything, so it doesn't matter and won't leak.
2805          */
2806         return 0;
2807 }
2808
2809 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
2810         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
2811         int cmd_type)
2812 {
2813         int pci_dir = XFER_NONE;
2814
2815         c->cmd_type = CMD_IOCTL_PEND;
2816         c->Header.ReplyQueue = 0;
2817         if (buff != NULL && size > 0) {
2818                 c->Header.SGList = 1;
2819                 c->Header.SGTotal = 1;
2820         } else {
2821                 c->Header.SGList = 0;
2822                 c->Header.SGTotal = 0;
2823         }
2824         c->Header.Tag.lower = c->busaddr;
2825         memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2826
2827         c->Request.Type.Type = cmd_type;
2828         if (cmd_type == TYPE_CMD) {
2829                 switch (cmd) {
2830                 case HPSA_INQUIRY:
2831                         /* are we trying to read a vital product page */
2832                         if (page_code != 0) {
2833                                 c->Request.CDB[1] = 0x01;
2834                                 c->Request.CDB[2] = page_code;
2835                         }
2836                         c->Request.CDBLen = 6;
2837                         c->Request.Type.Attribute = ATTR_SIMPLE;
2838                         c->Request.Type.Direction = XFER_READ;
2839                         c->Request.Timeout = 0;
2840                         c->Request.CDB[0] = HPSA_INQUIRY;
2841                         c->Request.CDB[4] = size & 0xFF;
2842                         break;
2843                 case HPSA_REPORT_LOG:
2844                 case HPSA_REPORT_PHYS:
2845                         /* Talking to controller so It's a physical command
2846                            mode = 00 target = 0.  Nothing to write.
2847                          */
2848                         c->Request.CDBLen = 12;
2849                         c->Request.Type.Attribute = ATTR_SIMPLE;
2850                         c->Request.Type.Direction = XFER_READ;
2851                         c->Request.Timeout = 0;
2852                         c->Request.CDB[0] = cmd;
2853                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2854                         c->Request.CDB[7] = (size >> 16) & 0xFF;
2855                         c->Request.CDB[8] = (size >> 8) & 0xFF;
2856                         c->Request.CDB[9] = size & 0xFF;
2857                         break;
2858                 case HPSA_CACHE_FLUSH:
2859                         c->Request.CDBLen = 12;
2860                         c->Request.Type.Attribute = ATTR_SIMPLE;
2861                         c->Request.Type.Direction = XFER_WRITE;
2862                         c->Request.Timeout = 0;
2863                         c->Request.CDB[0] = BMIC_WRITE;
2864                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2865                         break;
2866                 case TEST_UNIT_READY:
2867                         c->Request.CDBLen = 6;
2868                         c->Request.Type.Attribute = ATTR_SIMPLE;
2869                         c->Request.Type.Direction = XFER_NONE;
2870                         c->Request.Timeout = 0;
2871                         break;
2872                 default:
2873                         dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
2874                         BUG();
2875                         return;
2876                 }
2877         } else if (cmd_type == TYPE_MSG) {
2878                 switch (cmd) {
2879
2880                 case  HPSA_DEVICE_RESET_MSG:
2881                         c->Request.CDBLen = 16;
2882                         c->Request.Type.Type =  1; /* It is a MSG not a CMD */
2883                         c->Request.Type.Attribute = ATTR_SIMPLE;
2884                         c->Request.Type.Direction = XFER_NONE;
2885                         c->Request.Timeout = 0; /* Don't time out */
2886                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
2887                         c->Request.CDB[0] =  cmd;
2888                         c->Request.CDB[1] = 0x03;  /* Reset target above */
2889                         /* If bytes 4-7 are zero, it means reset the */
2890                         /* LunID device */
2891                         c->Request.CDB[4] = 0x00;
2892                         c->Request.CDB[5] = 0x00;
2893                         c->Request.CDB[6] = 0x00;
2894                         c->Request.CDB[7] = 0x00;
2895                 break;
2896
2897                 default:
2898                         dev_warn(&h->pdev->dev, "unknown message type %d\n",
2899                                 cmd);
2900                         BUG();
2901                 }
2902         } else {
2903                 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
2904                 BUG();
2905         }
2906
2907         switch (c->Request.Type.Direction) {
2908         case XFER_READ:
2909                 pci_dir = PCI_DMA_FROMDEVICE;
2910                 break;
2911         case XFER_WRITE:
2912                 pci_dir = PCI_DMA_TODEVICE;
2913                 break;
2914         case XFER_NONE:
2915                 pci_dir = PCI_DMA_NONE;
2916                 break;
2917         default:
2918                 pci_dir = PCI_DMA_BIDIRECTIONAL;
2919         }
2920
2921         hpsa_map_one(h->pdev, c, buff, size, pci_dir);
2922
2923         return;
2924 }
2925
2926 /*
2927  * Map (physical) PCI mem into (virtual) kernel space
2928  */
2929 static void __iomem *remap_pci_mem(ulong base, ulong size)
2930 {
2931         ulong page_base = ((ulong) base) & PAGE_MASK;
2932         ulong page_offs = ((ulong) base) - page_base;
2933         void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2934
2935         return page_remapped ? (page_remapped + page_offs) : NULL;
2936 }
2937
2938 /* Takes cmds off the submission queue and sends them to the hardware,
2939  * then puts them on the queue of cmds waiting for completion.
2940  */
2941 static void start_io(struct ctlr_info *h)
2942 {
2943         struct CommandList *c;
2944
2945         while (!list_empty(&h->reqQ)) {
2946                 c = list_entry(h->reqQ.next, struct CommandList, list);
2947                 /* can't do anything if fifo is full */
2948                 if ((h->access.fifo_full(h))) {
2949                         dev_warn(&h->pdev->dev, "fifo full\n");
2950                         break;
2951                 }
2952
2953                 /* Get the first entry from the Request Q */
2954                 removeQ(c);
2955                 h->Qdepth--;
2956
2957                 /* Tell the controller execute command */
2958                 h->access.submit_command(h, c);
2959
2960                 /* Put job onto the completed Q */
2961                 addQ(&h->cmpQ, c);
2962         }
2963 }
2964
2965 static inline unsigned long get_next_completion(struct ctlr_info *h)
2966 {
2967         return h->access.command_completed(h);
2968 }
2969
2970 static inline bool interrupt_pending(struct ctlr_info *h)
2971 {
2972         return h->access.intr_pending(h);
2973 }
2974
2975 static inline long interrupt_not_for_us(struct ctlr_info *h)
2976 {
2977         return (h->access.intr_pending(h) == 0) ||
2978                 (h->interrupts_enabled == 0);
2979 }
2980
2981 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
2982         u32 raw_tag)
2983 {
2984         if (unlikely(tag_index >= h->nr_cmds)) {
2985                 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
2986                 return 1;
2987         }
2988         return 0;
2989 }
2990
2991 static inline void finish_cmd(struct CommandList *c, u32 raw_tag)
2992 {
2993         removeQ(c);
2994         if (likely(c->cmd_type == CMD_SCSI))
2995                 complete_scsi_command(c);
2996         else if (c->cmd_type == CMD_IOCTL_PEND)
2997                 complete(c->waiting);
2998 }
2999
3000 static inline u32 hpsa_tag_contains_index(u32 tag)
3001 {
3002         return tag & DIRECT_LOOKUP_BIT;
3003 }
3004
3005 static inline u32 hpsa_tag_to_index(u32 tag)
3006 {
3007         return tag >> DIRECT_LOOKUP_SHIFT;
3008 }
3009
3010
3011 static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag)
3012 {
3013 #define HPSA_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
3014 #define HPSA_SIMPLE_ERROR_BITS 0x03
3015         if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
3016                 return tag & ~HPSA_SIMPLE_ERROR_BITS;
3017         return tag & ~HPSA_PERF_ERROR_BITS;
3018 }
3019
3020 /* process completion of an indexed ("direct lookup") command */
3021 static inline u32 process_indexed_cmd(struct ctlr_info *h,
3022         u32 raw_tag)
3023 {
3024         u32 tag_index;
3025         struct CommandList *c;
3026
3027         tag_index = hpsa_tag_to_index(raw_tag);
3028         if (bad_tag(h, tag_index, raw_tag))
3029                 return next_command(h);
3030         c = h->cmd_pool + tag_index;
3031         finish_cmd(c, raw_tag);
3032         return next_command(h);
3033 }
3034
3035 /* process completion of a non-indexed command */
3036 static inline u32 process_nonindexed_cmd(struct ctlr_info *h,
3037         u32 raw_tag)
3038 {
3039         u32 tag;
3040         struct CommandList *c = NULL;
3041
3042         tag = hpsa_tag_discard_error_bits(h, raw_tag);
3043         list_for_each_entry(c, &h->cmpQ, list) {
3044                 if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
3045                         finish_cmd(c, raw_tag);
3046                         return next_command(h);
3047                 }
3048         }
3049         bad_tag(h, h->nr_cmds + 1, raw_tag);
3050         return next_command(h);
3051 }
3052
3053 /* Some controllers, like p400, will give us one interrupt
3054  * after a soft reset, even if we turned interrupts off.
3055  * Only need to check for this in the hpsa_xxx_discard_completions
3056  * functions.
3057  */
3058 static int ignore_bogus_interrupt(struct ctlr_info *h)
3059 {
3060         if (likely(!reset_devices))
3061                 return 0;
3062
3063         if (likely(h->interrupts_enabled))
3064                 return 0;
3065
3066         dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
3067                 "(known firmware bug.)  Ignoring.\n");
3068
3069         return 1;
3070 }
3071
3072 static irqreturn_t hpsa_intx_discard_completions(int irq, void *dev_id)
3073 {
3074         struct ctlr_info *h = dev_id;
3075         unsigned long flags;
3076         u32 raw_tag;
3077
3078         if (ignore_bogus_interrupt(h))
3079                 return IRQ_NONE;
3080
3081         if (interrupt_not_for_us(h))
3082                 return IRQ_NONE;
3083         spin_lock_irqsave(&h->lock, flags);
3084         while (interrupt_pending(h)) {
3085                 raw_tag = get_next_completion(h);
3086                 while (raw_tag != FIFO_EMPTY)
3087                         raw_tag = next_command(h);
3088         }
3089         spin_unlock_irqrestore(&h->lock, flags);
3090         return IRQ_HANDLED;
3091 }
3092
3093 static irqreturn_t hpsa_msix_discard_completions(int irq, void *dev_id)
3094 {
3095         struct ctlr_info *h = dev_id;
3096         unsigned long flags;
3097         u32 raw_tag;
3098
3099         if (ignore_bogus_interrupt(h))
3100                 return IRQ_NONE;
3101
3102         spin_lock_irqsave(&h->lock, flags);
3103         raw_tag = get_next_completion(h);
3104         while (raw_tag != FIFO_EMPTY)
3105                 raw_tag = next_command(h);
3106         spin_unlock_irqrestore(&h->lock, flags);
3107         return IRQ_HANDLED;
3108 }
3109
3110 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id)
3111 {
3112         struct ctlr_info *h = dev_id;
3113         unsigned long flags;
3114         u32 raw_tag;
3115
3116         if (interrupt_not_for_us(h))
3117                 return IRQ_NONE;
3118         spin_lock_irqsave(&h->lock, flags);
3119         while (interrupt_pending(h)) {
3120                 raw_tag = get_next_completion(h);
3121                 while (raw_tag != FIFO_EMPTY) {
3122                         if (hpsa_tag_contains_index(raw_tag))
3123                                 raw_tag = process_indexed_cmd(h, raw_tag);
3124                         else
3125                                 raw_tag = process_nonindexed_cmd(h, raw_tag);
3126                 }
3127         }
3128         spin_unlock_irqrestore(&h->lock, flags);
3129         return IRQ_HANDLED;
3130 }
3131
3132 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id)
3133 {
3134         struct ctlr_info *h = dev_id;
3135         unsigned long flags;
3136         u32 raw_tag;
3137
3138         spin_lock_irqsave(&h->lock, flags);
3139         raw_tag = get_next_completion(h);
3140         while (raw_tag != FIFO_EMPTY) {
3141                 if (hpsa_tag_contains_index(raw_tag))
3142                         raw_tag = process_indexed_cmd(h, raw_tag);
3143                 else
3144                         raw_tag = process_nonindexed_cmd(h, raw_tag);
3145         }
3146         spin_unlock_irqrestore(&h->lock, flags);
3147         return IRQ_HANDLED;
3148 }
3149
3150 /* Send a message CDB to the firmware. Careful, this only works
3151  * in simple mode, not performant mode due to the tag lookup.
3152  * We only ever use this immediately after a controller reset.
3153  */
3154 static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
3155                                                 unsigned char type)
3156 {
3157         struct Command {
3158                 struct CommandListHeader CommandHeader;
3159                 struct RequestBlock Request;
3160                 struct ErrDescriptor ErrorDescriptor;
3161         };
3162         struct Command *cmd;
3163         static const size_t cmd_sz = sizeof(*cmd) +
3164                                         sizeof(cmd->ErrorDescriptor);
3165         dma_addr_t paddr64;
3166         uint32_t paddr32, tag;
3167         void __iomem *vaddr;
3168         int i, err;
3169
3170         vaddr = pci_ioremap_bar(pdev, 0);
3171         if (vaddr == NULL)
3172                 return -ENOMEM;
3173
3174         /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3175          * CCISS commands, so they must be allocated from the lower 4GiB of
3176          * memory.
3177          */
3178         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3179         if (err) {
3180                 iounmap(vaddr);
3181                 return -ENOMEM;
3182         }
3183
3184         cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3185         if (cmd == NULL) {
3186                 iounmap(vaddr);
3187                 return -ENOMEM;
3188         }
3189
3190         /* This must fit, because of the 32-bit consistent DMA mask.  Also,
3191          * although there's no guarantee, we assume that the address is at
3192          * least 4-byte aligned (most likely, it's page-aligned).
3193          */
3194         paddr32 = paddr64;
3195
3196         cmd->CommandHeader.ReplyQueue = 0;
3197         cmd->CommandHeader.SGList = 0;
3198         cmd->CommandHeader.SGTotal = 0;
3199         cmd->CommandHeader.Tag.lower = paddr32;
3200         cmd->CommandHeader.Tag.upper = 0;
3201         memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3202
3203         cmd->Request.CDBLen = 16;
3204         cmd->Request.Type.Type = TYPE_MSG;
3205         cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3206         cmd->Request.Type.Direction = XFER_NONE;
3207         cmd->Request.Timeout = 0; /* Don't time out */
3208         cmd->Request.CDB[0] = opcode;
3209         cmd->Request.CDB[1] = type;
3210         memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
3211         cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
3212         cmd->ErrorDescriptor.Addr.upper = 0;
3213         cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
3214
3215         writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3216
3217         for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
3218                 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3219                 if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr32)
3220                         break;
3221                 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
3222         }
3223
3224         iounmap(vaddr);
3225
3226         /* we leak the DMA buffer here ... no choice since the controller could
3227          *  still complete the command.
3228          */
3229         if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
3230                 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
3231                         opcode, type);
3232                 return -ETIMEDOUT;
3233         }
3234
3235         pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3236
3237         if (tag & HPSA_ERROR_BIT) {
3238                 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
3239                         opcode, type);
3240                 return -EIO;
3241         }
3242
3243         dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
3244                 opcode, type);
3245         return 0;
3246 }
3247
3248 #define hpsa_noop(p) hpsa_message(p, 3, 0)
3249
3250 static int hpsa_controller_hard_reset(struct pci_dev *pdev,
3251         void * __iomem vaddr, u32 use_doorbell)
3252 {
3253         u16 pmcsr;
3254         int pos;
3255
3256         if (use_doorbell) {
3257                 /* For everything after the P600, the PCI power state method
3258                  * of resetting the controller doesn't work, so we have this
3259                  * other way using the doorbell register.
3260                  */
3261                 dev_info(&pdev->dev, "using doorbell to reset controller\n");
3262                 writel(use_doorbell, vaddr + SA5_DOORBELL);
3263         } else { /* Try to do it the PCI power state way */
3264
3265                 /* Quoting from the Open CISS Specification: "The Power
3266                  * Management Control/Status Register (CSR) controls the power
3267                  * state of the device.  The normal operating state is D0,
3268                  * CSR=00h.  The software off state is D3, CSR=03h.  To reset
3269                  * the controller, place the interface device in D3 then to D0,
3270                  * this causes a secondary PCI reset which will reset the
3271                  * controller." */
3272
3273                 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3274                 if (pos == 0) {
3275                         dev_err(&pdev->dev,
3276                                 "hpsa_reset_controller: "
3277                                 "PCI PM not supported\n");
3278                         return -ENODEV;
3279                 }
3280                 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
3281                 /* enter the D3hot power management state */
3282                 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3283                 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3284                 pmcsr |= PCI_D3hot;
3285                 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3286
3287                 msleep(500);
3288
3289                 /* enter the D0 power management state */
3290                 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3291                 pmcsr |= PCI_D0;
3292                 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3293         }
3294         return 0;
3295 }
3296
3297 static __devinit void init_driver_version(char *driver_version, int len)
3298 {
3299         memset(driver_version, 0, len);
3300         strncpy(driver_version, "hpsa " HPSA_DRIVER_VERSION, len - 1);
3301 }
3302
3303 static __devinit int write_driver_ver_to_cfgtable(
3304         struct CfgTable __iomem *cfgtable)
3305 {
3306         char *driver_version;
3307         int i, size = sizeof(cfgtable->driver_version);
3308
3309         driver_version = kmalloc(size, GFP_KERNEL);
3310         if (!driver_version)
3311                 return -ENOMEM;
3312
3313         init_driver_version(driver_version, size);
3314         for (i = 0; i < size; i++)
3315                 writeb(driver_version[i], &cfgtable->driver_version[i]);
3316         kfree(driver_version);
3317         return 0;
3318 }
3319
3320 static __devinit void read_driver_ver_from_cfgtable(
3321         struct CfgTable __iomem *cfgtable, unsigned char *driver_ver)
3322 {
3323         int i;
3324
3325         for (i = 0; i < sizeof(cfgtable->driver_version); i++)
3326                 driver_ver[i] = readb(&cfgtable->driver_version[i]);
3327 }
3328
3329 static __devinit int controller_reset_failed(
3330         struct CfgTable __iomem *cfgtable)
3331 {
3332
3333         char *driver_ver, *old_driver_ver;
3334         int rc, size = sizeof(cfgtable->driver_version);
3335
3336         old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
3337         if (!old_driver_ver)
3338                 return -ENOMEM;
3339         driver_ver = old_driver_ver + size;
3340
3341         /* After a reset, the 32 bytes of "driver version" in the cfgtable
3342          * should have been changed, otherwise we know the reset failed.
3343          */
3344         init_driver_version(old_driver_ver, size);
3345         read_driver_ver_from_cfgtable(cfgtable, driver_ver);
3346         rc = !memcmp(driver_ver, old_driver_ver, size);
3347         kfree(old_driver_ver);
3348         return rc;
3349 }
3350 /* This does a hard reset of the controller using PCI power management
3351  * states or the using the doorbell register.
3352  */
3353 static __devinit int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
3354 {
3355         u64 cfg_offset;
3356         u32 cfg_base_addr;
3357         u64 cfg_base_addr_index;
3358         void __iomem *vaddr;
3359         unsigned long paddr;
3360         u32 misc_fw_support;
3361         int rc;
3362         struct CfgTable __iomem *cfgtable;
3363         u32 use_doorbell;
3364         u32 board_id;
3365         u16 command_register;
3366
3367         /* For controllers as old as the P600, this is very nearly
3368          * the same thing as
3369          *
3370          * pci_save_state(pci_dev);
3371          * pci_set_power_state(pci_dev, PCI_D3hot);
3372          * pci_set_power_state(pci_dev, PCI_D0);
3373          * pci_restore_state(pci_dev);
3374          *
3375          * For controllers newer than the P600, the pci power state
3376          * method of resetting doesn't work so we have another way
3377          * using the doorbell register.
3378          */
3379
3380         rc = hpsa_lookup_board_id(pdev, &board_id);
3381         if (rc < 0 || !ctlr_is_resettable(board_id)) {
3382                 dev_warn(&pdev->dev, "Not resetting device.\n");
3383                 return -ENODEV;
3384         }
3385
3386         /* if controller is soft- but not hard resettable... */
3387         if (!ctlr_is_hard_resettable(board_id))
3388                 return -ENOTSUPP; /* try soft reset later. */
3389
3390         /* Save the PCI command register */
3391         pci_read_config_word(pdev, 4, &command_register);
3392         /* Turn the board off.  This is so that later pci_restore_state()
3393          * won't turn the board on before the rest of config space is ready.
3394          */
3395         pci_disable_device(pdev);
3396         pci_save_state(pdev);
3397
3398         /* find the first memory BAR, so we can find the cfg table */
3399         rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
3400         if (rc)
3401                 return rc;
3402         vaddr = remap_pci_mem(paddr, 0x250);
3403         if (!vaddr)
3404                 return -ENOMEM;
3405
3406         /* find cfgtable in order to check if reset via doorbell is supported */
3407         rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
3408                                         &cfg_base_addr_index, &cfg_offset);
3409         if (rc)
3410                 goto unmap_vaddr;
3411         cfgtable = remap_pci_mem(pci_resource_start(pdev,
3412                        cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
3413         if (!cfgtable) {
3414                 rc = -ENOMEM;
3415                 goto unmap_vaddr;
3416         }
3417         rc = write_driver_ver_to_cfgtable(cfgtable);
3418         if (rc)
3419                 goto unmap_vaddr;
3420
3421         /* If reset via doorbell register is supported, use that.
3422          * There are two such methods.  Favor the newest method.
3423          */
3424         misc_fw_support = readl(&cfgtable->misc_fw_support);
3425         use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
3426         if (use_doorbell) {
3427                 use_doorbell = DOORBELL_CTLR_RESET2;
3428         } else {
3429                 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
3430                 if (use_doorbell) {
3431                         dev_warn(&pdev->dev, "Controller claims that "
3432                                 "'Bit 2 doorbell reset' is "
3433                                 "supported, but not 'bit 5 doorbell reset'.  "
3434                                 "Firmware update is recommended.\n");
3435                         rc = -ENOTSUPP; /* try soft reset */
3436                         goto unmap_cfgtable;
3437                 }
3438         }
3439
3440         rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
3441         if (rc)
3442                 goto unmap_cfgtable;
3443
3444         pci_restore_state(pdev);
3445         rc = pci_enable_device(pdev);
3446         if (rc) {
3447                 dev_warn(&pdev->dev, "failed to enable device.\n");
3448                 goto unmap_cfgtable;
3449         }
3450         pci_write_config_word(pdev, 4, command_register);
3451
3452         /* Some devices (notably the HP Smart Array 5i Controller)
3453            need a little pause here */
3454         msleep(HPSA_POST_RESET_PAUSE_MSECS);
3455
3456         /* Wait for board to become not ready, then ready. */
3457         dev_info(&pdev->dev, "Waiting for board to reset.\n");
3458         rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
3459         if (rc) {
3460                 dev_warn(&pdev->dev,
3461                         "failed waiting for board to reset."
3462                         " Will try soft reset.\n");
3463                 rc = -ENOTSUPP; /* Not expected, but try soft reset later */
3464                 goto unmap_cfgtable;
3465         }
3466         rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
3467         if (rc) {
3468                 dev_warn(&pdev->dev,
3469                         "failed waiting for board to become ready "
3470                         "after hard reset\n");
3471                 goto unmap_cfgtable;
3472         }
3473
3474         rc = controller_reset_failed(vaddr);
3475         if (rc < 0)
3476                 goto unmap_cfgtable;
3477         if (rc) {
3478                 dev_warn(&pdev->dev, "Unable to successfully reset "
3479                         "controller. Will try soft reset.\n");
3480                 rc = -ENOTSUPP;
3481         } else {
3482                 dev_info(&pdev->dev, "board ready after hard reset.\n");
3483         }
3484
3485 unmap_cfgtable:
3486         iounmap(cfgtable);
3487
3488 unmap_vaddr:
3489         iounmap(vaddr);
3490         return rc;
3491 }
3492
3493 /*
3494  *  We cannot read the structure directly, for portability we must use
3495  *   the io functions.
3496  *   This is for debug only.
3497  */
3498 static void print_cfg_table(struct device *dev, struct CfgTable *tb)
3499 {
3500 #ifdef HPSA_DEBUG
3501         int i;
3502         char temp_name[17];
3503
3504         dev_info(dev, "Controller Configuration information\n");
3505         dev_info(dev, "------------------------------------\n");
3506         for (i = 0; i < 4; i++)
3507                 temp_name[i] = readb(&(tb->Signature[i]));
3508         temp_name[4] = '\0';
3509         dev_info(dev, "   Signature = %s\n", temp_name);
3510         dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
3511         dev_info(dev, "   Transport methods supported = 0x%x\n",
3512                readl(&(tb->TransportSupport)));
3513         dev_info(dev, "   Transport methods active = 0x%x\n",
3514                readl(&(tb->TransportActive)));
3515         dev_info(dev, "   Requested transport Method = 0x%x\n",
3516                readl(&(tb->HostWrite.TransportRequest)));
3517         dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
3518                readl(&(tb->HostWrite.CoalIntDelay)));
3519         dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
3520                readl(&(tb->HostWrite.CoalIntCount)));
3521         dev_info(dev, "   Max outstanding commands = 0x%d\n",
3522                readl(&(tb->CmdsOutMax)));
3523         dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3524         for (i = 0; i < 16; i++)
3525                 temp_name[i] = readb(&(tb->ServerName[i]));
3526         temp_name[16] = '\0';
3527         dev_info(dev, "   Server Name = %s\n", temp_name);
3528         dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
3529                 readl(&(tb->HeartBeat)));
3530 #endif                          /* HPSA_DEBUG */
3531 }
3532
3533 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3534 {
3535         int i, offset, mem_type, bar_type;
3536
3537         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3538                 return 0;
3539         offset = 0;
3540         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3541                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3542                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3543                         offset += 4;
3544                 else {
3545                         mem_type = pci_resource_flags(pdev, i) &
3546                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3547                         switch (mem_type) {
3548                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
3549                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3550                                 offset += 4;    /* 32 bit */
3551                                 break;
3552                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
3553                                 offset += 8;
3554                                 break;
3555                         default:        /* reserved in PCI 2.2 */
3556                                 dev_warn(&pdev->dev,
3557                                        "base address is invalid\n");
3558                                 return -1;
3559                                 break;
3560                         }
3561                 }
3562                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3563                         return i + 1;
3564         }
3565         return -1;
3566 }
3567
3568 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3569  * controllers that are capable. If not, we use IO-APIC mode.
3570  */
3571
3572 static void __devinit hpsa_interrupt_mode(struct ctlr_info *h)
3573 {
3574 #ifdef CONFIG_PCI_MSI
3575         int err;
3576         struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1},
3577         {0, 2}, {0, 3}
3578         };
3579
3580         /* Some boards advertise MSI but don't really support it */
3581         if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
3582             (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
3583                 goto default_int_mode;
3584         if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
3585                 dev_info(&h->pdev->dev, "MSIX\n");
3586                 err = pci_enable_msix(h->pdev, hpsa_msix_entries, 4);
3587                 if (!err) {
3588                         h->intr[0] = hpsa_msix_entries[0].vector;
3589                         h->intr[1] = hpsa_msix_entries[1].vector;
3590                         h->intr[2] = hpsa_msix_entries[2].vector;
3591                         h->intr[3] = hpsa_msix_entries[3].vector;
3592                         h->msix_vector = 1;
3593                         return;
3594                 }
3595                 if (err > 0) {
3596                         dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
3597                                "available\n", err);
3598                         goto default_int_mode;
3599                 } else {
3600                         dev_warn(&h->pdev->dev, "MSI-X init failed %d\n",
3601                                err);
3602                         goto default_int_mode;
3603                 }
3604         }
3605         if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
3606                 dev_info(&h->pdev->dev, "MSI\n");
3607                 if (!pci_enable_msi(h->pdev))
3608                         h->msi_vector = 1;
3609                 else
3610                         dev_warn(&h->pdev->dev, "MSI init failed\n");
3611         }
3612 default_int_mode:
3613 #endif                          /* CONFIG_PCI_MSI */
3614         /* if we get here we're going to use the default interrupt mode */
3615         h->intr[h->intr_mode] = h->pdev->irq;
3616 }
3617
3618 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
3619 {
3620         int i;
3621         u32 subsystem_vendor_id, subsystem_device_id;
3622
3623         subsystem_vendor_id = pdev->subsystem_vendor;
3624         subsystem_device_id = pdev->subsystem_device;
3625         *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
3626                     subsystem_vendor_id;
3627
3628         for (i = 0; i < ARRAY_SIZE(products); i++)
3629                 if (*board_id == products[i].board_id)
3630                         return i;
3631
3632         if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
3633                 subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
3634                 !hpsa_allow_any) {
3635                 dev_warn(&pdev->dev, "unrecognized board ID: "
3636                         "0x%08x, ignoring.\n", *board_id);
3637                         return -ENODEV;
3638         }
3639         return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
3640 }
3641
3642 static inline bool hpsa_board_disabled(struct pci_dev *pdev)
3643 {
3644         u16 command;
3645
3646         (void) pci_read_config_word(pdev, PCI_COMMAND, &command);
3647         return ((command & PCI_COMMAND_MEMORY) == 0);
3648 }
3649
3650 static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
3651         unsigned long *memory_bar)
3652 {
3653         int i;
3654
3655         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
3656                 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
3657                         /* addressing mode bits already removed */
3658                         *memory_bar = pci_resource_start(pdev, i);
3659                         dev_dbg(&pdev->dev, "memory BAR = %lx\n",
3660                                 *memory_bar);
3661                         return 0;
3662                 }
3663         dev_warn(&pdev->dev, "no memory BAR found\n");
3664         return -ENODEV;
3665 }
3666
3667 static int __devinit hpsa_wait_for_board_state(struct pci_dev *pdev,
3668         void __iomem *vaddr, int wait_for_ready)
3669 {
3670         int i, iterations;
3671         u32 scratchpad;
3672         if (wait_for_ready)
3673                 iterations = HPSA_BOARD_READY_ITERATIONS;
3674         else
3675                 iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
3676
3677         for (i = 0; i < iterations; i++) {
3678                 scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
3679                 if (wait_for_ready) {
3680                         if (scratchpad == HPSA_FIRMWARE_READY)
3681                                 return 0;
3682                 } else {
3683                         if (scratchpad != HPSA_FIRMWARE_READY)
3684                                 return 0;
3685                 }
3686                 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
3687         }
3688         dev_warn(&pdev->dev, "board not ready, timed out.\n");
3689         return -ENODEV;
3690 }
3691
3692 static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev,
3693         void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
3694         u64 *cfg_offset)
3695 {
3696         *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
3697         *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
3698         *cfg_base_addr &= (u32) 0x0000ffff;
3699         *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
3700         if (*cfg_base_addr_index == -1) {
3701                 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
3702                 return -ENODEV;
3703         }
3704         return 0;
3705 }
3706
3707 static int __devinit hpsa_find_cfgtables(struct ctlr_info *h)
3708 {
3709         u64 cfg_offset;
3710         u32 cfg_base_addr;
3711         u64 cfg_base_addr_index;
3712         u32 trans_offset;
3713         int rc;
3714
3715         rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
3716                 &cfg_base_addr_index, &cfg_offset);
3717         if (rc)
3718                 return rc;
3719         h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
3720                        cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
3721         if (!h->cfgtable)
3722                 return -ENOMEM;
3723         rc = write_driver_ver_to_cfgtable(h->cfgtable);
3724         if (rc)
3725                 return rc;
3726         /* Find performant mode table. */
3727         trans_offset = readl(&h->cfgtable->TransMethodOffset);
3728         h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
3729                                 cfg_base_addr_index)+cfg_offset+trans_offset,
3730                                 sizeof(*h->transtable));
3731         if (!h->transtable)
3732                 return -ENOMEM;
3733         return 0;
3734 }
3735
3736 static void __devinit hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
3737 {
3738         h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
3739
3740         /* Limit commands in memory limited kdump scenario. */
3741         if (reset_devices && h->max_commands > 32)
3742                 h->max_commands = 32;
3743
3744         if (h->max_commands < 16) {
3745                 dev_warn(&h->pdev->dev, "Controller reports "
3746                         "max supported commands of %d, an obvious lie. "
3747                         "Using 16.  Ensure that firmware is up to date.\n",
3748                         h->max_commands);
3749                 h->max_commands = 16;
3750         }
3751 }
3752
3753 /* Interrogate the hardware for some limits:
3754  * max commands, max SG elements without chaining, and with chaining,
3755  * SG chain block size, etc.
3756  */
3757 static void __devinit hpsa_find_board_params(struct ctlr_info *h)
3758 {
3759         hpsa_get_max_perf_mode_cmds(h);
3760         h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
3761         h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
3762         /*
3763          * Limit in-command s/g elements to 32 save dma'able memory.
3764          * Howvever spec says if 0, use 31
3765          */
3766         h->max_cmd_sg_entries = 31;
3767         if (h->maxsgentries > 512) {
3768                 h->max_cmd_sg_entries = 32;
3769                 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
3770                 h->maxsgentries--; /* save one for chain pointer */
3771         } else {
3772                 h->maxsgentries = 31; /* default to traditional values */
3773                 h->chainsize = 0;
3774         }
3775 }
3776
3777 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
3778 {
3779         if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
3780             (readb(&h->cfgtable->Signature[1]) != 'I') ||
3781             (readb(&h->cfgtable->Signature[2]) != 'S') ||
3782             (readb(&h->cfgtable->Signature[3]) != 'S')) {
3783                 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
3784                 return false;
3785         }
3786         return true;
3787 }
3788
3789 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3790 static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
3791 {
3792 #ifdef CONFIG_X86
3793         u32 prefetch;
3794
3795         prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
3796         prefetch |= 0x100;
3797         writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
3798 #endif
3799 }
3800
3801 /* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
3802  * in a prefetch beyond physical memory.
3803  */
3804 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
3805 {
3806         u32 dma_prefetch;
3807
3808         if (h->board_id != 0x3225103C)
3809                 return;
3810         dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
3811         dma_prefetch |= 0x8000;
3812         writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
3813 }
3814
3815 static void __devinit hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
3816 {
3817         int i;
3818         u32 doorbell_value;
3819         unsigned long flags;
3820
3821         /* under certain very rare conditions, this can take awhile.
3822          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3823          * as we enter this code.)
3824          */
3825         for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3826                 spin_lock_irqsave(&h->lock, flags);
3827                 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
3828                 spin_unlock_irqrestore(&h->lock, flags);
3829                 if (!(doorbell_value & CFGTBL_ChangeReq))
3830                         break;
3831                 /* delay and try again */
3832                 usleep_range(10000, 20000);
3833         }
3834 }
3835
3836 static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h)
3837 {
3838         u32 trans_support;
3839
3840         trans_support = readl(&(h->cfgtable->TransportSupport));
3841         if (!(trans_support & SIMPLE_MODE))
3842                 return -ENOTSUPP;
3843
3844         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3845         /* Update the field, and then ring the doorbell */
3846         writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
3847         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3848         hpsa_wait_for_mode_change_ack(h);
3849         print_cfg_table(&h->pdev->dev, h->cfgtable);
3850         if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3851                 dev_warn(&h->pdev->dev,
3852                         "unable to get board into simple mode\n");
3853                 return -ENODEV;
3854         }
3855         h->transMethod = CFGTBL_Trans_Simple;
3856         return 0;
3857 }
3858
3859 static int __devinit hpsa_pci_init(struct ctlr_info *h)
3860 {
3861         int prod_index, err;
3862
3863         prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
3864         if (prod_index < 0)
3865                 return -ENODEV;
3866         h->product_name = products[prod_index].product_name;
3867         h->access = *(products[prod_index].access);
3868
3869         if (hpsa_board_disabled(h->pdev)) {
3870                 dev_warn(&h->pdev->dev, "controller appears to be disabled\n");
3871                 return -ENODEV;
3872         }
3873         err = pci_enable_device(h->pdev);
3874         if (err) {
3875                 dev_warn(&h->pdev->dev, "unable to enable PCI device\n");
3876                 return err;
3877         }
3878
3879         err = pci_request_regions(h->pdev, "hpsa");
3880         if (err) {
3881                 dev_err(&h->pdev->dev,
3882                         "cannot obtain PCI resources, aborting\n");
3883                 return err;
3884         }
3885         hpsa_interrupt_mode(h);
3886         err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
3887         if (err)
3888                 goto err_out_free_res;
3889         h->vaddr = remap_pci_mem(h->paddr, 0x250);
3890         if (!h->vaddr) {
3891                 err = -ENOMEM;
3892                 goto err_out_free_res;
3893         }
3894         err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
3895         if (err)
3896                 goto err_out_free_res;
3897         err = hpsa_find_cfgtables(h);
3898         if (err)
3899                 goto err_out_free_res;
3900         hpsa_find_board_params(h);
3901
3902         if (!hpsa_CISS_signature_present(h)) {
3903                 err = -ENODEV;
3904                 goto err_out_free_res;
3905         }
3906         hpsa_enable_scsi_prefetch(h);
3907         hpsa_p600_dma_prefetch_quirk(h);
3908         err = hpsa_enter_simple_mode(h);
3909         if (err)
3910                 goto err_out_free_res;
3911         return 0;
3912
3913 err_out_free_res:
3914         if (h->transtable)
3915                 iounmap(h->transtable);
3916         if (h->cfgtable)
3917                 iounmap(h->cfgtable);
3918         if (h->vaddr)
3919                 iounmap(h->vaddr);
3920         /*
3921          * Deliberately omit pci_disable_device(): it does something nasty to
3922          * Smart Array controllers that pci_enable_device does not undo
3923          */
3924         pci_release_regions(h->pdev);
3925         return err;
3926 }
3927
3928 static void __devinit hpsa_hba_inquiry(struct ctlr_info *h)
3929 {
3930         int rc;
3931
3932 #define HBA_INQUIRY_BYTE_COUNT 64
3933         h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
3934         if (!h->hba_inquiry_data)
3935                 return;
3936         rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
3937                 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
3938         if (rc != 0) {
3939                 kfree(h->hba_inquiry_data);
3940                 h->hba_inquiry_data = NULL;
3941         }
3942 }
3943
3944 static __devinit int hpsa_init_reset_devices(struct pci_dev *pdev)
3945 {
3946         int rc, i;
3947
3948         if (!reset_devices)
3949                 return 0;
3950
3951         /* Reset the controller with a PCI power-cycle or via doorbell */
3952         rc = hpsa_kdump_hard_reset_controller(pdev);
3953
3954         /* -ENOTSUPP here means we cannot reset the controller
3955          * but it's already (and still) up and running in
3956          * "performant mode".  Or, it might be 640x, which can't reset
3957          * due to concerns about shared bbwc between 6402/6404 pair.
3958          */
3959         if (rc == -ENOTSUPP)
3960                 return rc; /* just try to do the kdump anyhow. */
3961         if (rc)
3962                 return -ENODEV;
3963
3964         /* Now try to get the controller to respond to a no-op */
3965         dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
3966         for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
3967                 if (hpsa_noop(pdev) == 0)
3968                         break;
3969                 else
3970                         dev_warn(&pdev->dev, "no-op failed%s\n",
3971                                         (i < 11 ? "; re-trying" : ""));
3972         }
3973         return 0;
3974 }
3975
3976 static __devinit int hpsa_allocate_cmd_pool(struct ctlr_info *h)
3977 {
3978         h->cmd_pool_bits = kzalloc(
3979                 DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) *
3980                 sizeof(unsigned long), GFP_KERNEL);
3981         h->cmd_pool = pci_alloc_consistent(h->pdev,
3982                     h->nr_cmds * sizeof(*h->cmd_pool),
3983                     &(h->cmd_pool_dhandle));
3984         h->errinfo_pool = pci_alloc_consistent(h->pdev,
3985                     h->nr_cmds * sizeof(*h->errinfo_pool),
3986                     &(h->errinfo_pool_dhandle));
3987         if ((h->cmd_pool_bits == NULL)
3988             || (h->cmd_pool == NULL)
3989             || (h->errinfo_pool == NULL)) {
3990                 dev_err(&h->pdev->dev, "out of memory in %s", __func__);
3991                 return -ENOMEM;
3992         }
3993         return 0;
3994 }
3995
3996 static void hpsa_free_cmd_pool(struct ctlr_info *h)
3997 {
3998         kfree(h->cmd_pool_bits);
3999         if (h->cmd_pool)
4000                 pci_free_consistent(h->pdev,
4001                             h->nr_cmds * sizeof(struct CommandList),
4002                             h->cmd_pool, h->cmd_pool_dhandle);
4003         if (h->errinfo_pool)
4004                 pci_free_consistent(h->pdev,
4005                             h->nr_cmds * sizeof(struct ErrorInfo),
4006                             h->errinfo_pool,
4007                             h->errinfo_pool_dhandle);
4008 }
4009
4010 static int hpsa_request_irq(struct ctlr_info *h,
4011         irqreturn_t (*msixhandler)(int, void *),
4012         irqreturn_t (*intxhandler)(int, void *))
4013 {
4014         int rc;
4015
4016         if (h->msix_vector || h->msi_vector)
4017                 rc = request_irq(h->intr[h->intr_mode], msixhandler,
4018                                 IRQF_DISABLED, h->devname, h);
4019         else
4020                 rc = request_irq(h->intr[h->intr_mode], intxhandler,
4021                                 IRQF_DISABLED, h->devname, h);
4022         if (rc) {
4023                 dev_err(&h->pdev->dev, "unable to get irq %d for %s\n",
4024                        h->intr[h->intr_mode], h->devname);
4025                 return -ENODEV;
4026         }
4027         return 0;
4028 }
4029
4030 static int __devinit hpsa_kdump_soft_reset(struct ctlr_info *h)
4031 {
4032         if (hpsa_send_host_reset(h, RAID_CTLR_LUNID,
4033                 HPSA_RESET_TYPE_CONTROLLER)) {
4034                 dev_warn(&h->pdev->dev, "Resetting array controller failed.\n");
4035                 return -EIO;
4036         }
4037
4038         dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
4039         if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) {
4040                 dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
4041                 return -1;
4042         }
4043
4044         dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
4045         if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) {
4046                 dev_warn(&h->pdev->dev, "Board failed to become ready "
4047                         "after soft reset.\n");
4048                 return -1;
4049         }
4050
4051         return 0;
4052 }
4053
4054 static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
4055 {
4056         free_irq(h->intr[h->intr_mode], h);
4057 #ifdef CONFIG_PCI_MSI
4058         if (h->msix_vector)
4059                 pci_disable_msix(h->pdev);
4060         else if (h->msi_vector)
4061                 pci_disable_msi(h->pdev);
4062 #endif /* CONFIG_PCI_MSI */
4063         hpsa_free_sg_chain_blocks(h);
4064         hpsa_free_cmd_pool(h);
4065         kfree(h->blockFetchTable);
4066         pci_free_consistent(h->pdev, h->reply_pool_size,
4067                 h->reply_pool, h->reply_pool_dhandle);
4068         if (h->vaddr)
4069                 iounmap(h->vaddr);
4070         if (h->transtable)
4071                 iounmap(h->transtable);
4072         if (h->cfgtable)
4073                 iounmap(h->cfgtable);
4074         pci_release_regions(h->pdev);
4075         kfree(h);
4076 }
4077
4078 static int __devinit hpsa_init_one(struct pci_dev *pdev,
4079                                     const struct pci_device_id *ent)
4080 {
4081         int dac, rc;
4082         struct ctlr_info *h;
4083         int try_soft_reset = 0;
4084         unsigned long flags;
4085
4086         if (number_of_controllers == 0)
4087                 printk(KERN_INFO DRIVER_NAME "\n");
4088
4089         rc = hpsa_init_reset_devices(pdev);
4090         if (rc) {
4091                 if (rc != -ENOTSUPP)
4092                         return rc;
4093                 /* If the reset fails in a particular way (it has no way to do
4094                  * a proper hard reset, so returns -ENOTSUPP) we can try to do
4095                  * a soft reset once we get the controller configured up to the
4096                  * point that it can accept a command.
4097                  */
4098                 try_soft_reset = 1;
4099                 rc = 0;
4100         }
4101
4102 reinit_after_soft_reset:
4103
4104         /* Command structures must be aligned on a 32-byte boundary because
4105          * the 5 lower bits of the address are used by the hardware. and by
4106          * the driver.  See comments in hpsa.h for more info.
4107          */
4108 #define COMMANDLIST_ALIGNMENT 32
4109         BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
4110         h = kzalloc(sizeof(*h), GFP_KERNEL);
4111         if (!h)
4112                 return -ENOMEM;
4113
4114         h->pdev = pdev;
4115         h->busy_initializing = 1;
4116         h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
4117         INIT_LIST_HEAD(&h->cmpQ);
4118         INIT_LIST_HEAD(&h->reqQ);
4119         spin_lock_init(&h->lock);
4120         spin_lock_init(&h->scan_lock);
4121         rc = hpsa_pci_init(h);
4122         if (rc != 0)
4123                 goto clean1;
4124
4125         sprintf(h->devname, "hpsa%d", number_of_controllers);
4126         h->ctlr = number_of_controllers;
4127         number_of_controllers++;
4128
4129         /* configure PCI DMA stuff */
4130         rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4131         if (rc == 0) {
4132                 dac = 1;
4133         } else {
4134                 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4135                 if (rc == 0) {
4136                         dac = 0;
4137                 } else {
4138                         dev_err(&pdev->dev, "no suitable DMA available\n");
4139                         goto clean1;
4140                 }
4141         }
4142
4143         /* make sure the board interrupts are off */
4144         h->access.set_intr_mask(h, HPSA_INTR_OFF);
4145
4146         if (hpsa_request_irq(h, do_hpsa_intr_msi, do_hpsa_intr_intx))
4147                 goto clean2;
4148         dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
4149                h->devname, pdev->device,
4150                h->intr[h->intr_mode], dac ? "" : " not");
4151         if (hpsa_allocate_cmd_pool(h))
4152                 goto clean4;
4153         if (hpsa_allocate_sg_chain_blocks(h))
4154                 goto clean4;
4155         init_waitqueue_head(&h->scan_wait_queue);
4156         h->scan_finished = 1; /* no scan currently in progress */
4157
4158         pci_set_drvdata(pdev, h);
4159         h->ndevices = 0;
4160         h->scsi_host = NULL;
4161         spin_lock_init(&h->devlock);
4162         hpsa_put_ctlr_into_performant_mode(h);
4163
4164         /* At this point, the controller is ready to take commands.
4165          * Now, if reset_devices and the hard reset didn't work, try
4166          * the soft reset and see if that works.
4167          */
4168         if (try_soft_reset) {
4169
4170                 /* This is kind of gross.  We may or may not get a completion
4171                  * from the soft reset command, and if we do, then the value
4172                  * from the fifo may or may not be valid.  So, we wait 10 secs
4173                  * after the reset throwing away any completions we get during
4174                  * that time.  Unregister the interrupt handler and register
4175                  * fake ones to scoop up any residual completions.
4176                  */
4177                 spin_lock_irqsave(&h->lock, flags);
4178                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4179                 spin_unlock_irqrestore(&h->lock, flags);
4180                 free_irq(h->intr[h->intr_mode], h);
4181                 rc = hpsa_request_irq(h, hpsa_msix_discard_completions,
4182                                         hpsa_intx_discard_completions);
4183                 if (rc) {
4184                         dev_warn(&h->pdev->dev, "Failed to request_irq after "
4185                                 "soft reset.\n");
4186                         goto clean4;
4187                 }
4188
4189                 rc = hpsa_kdump_soft_reset(h);
4190                 if (rc)
4191                         /* Neither hard nor soft reset worked, we're hosed. */
4192                         goto clean4;
4193
4194                 dev_info(&h->pdev->dev, "Board READY.\n");
4195                 dev_info(&h->pdev->dev,
4196                         "Waiting for stale completions to drain.\n");
4197                 h->access.set_intr_mask(h, HPSA_INTR_ON);
4198                 msleep(10000);
4199                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4200
4201                 rc = controller_reset_failed(h->cfgtable);
4202                 if (rc)
4203                         dev_info(&h->pdev->dev,
4204                                 "Soft reset appears to have failed.\n");
4205
4206                 /* since the controller's reset, we have to go back and re-init
4207                  * everything.  Easiest to just forget what we've done and do it
4208                  * all over again.
4209                  */
4210                 hpsa_undo_allocations_after_kdump_soft_reset(h);
4211                 try_soft_reset = 0;
4212                 if (rc)
4213                         /* don't go to clean4, we already unallocated */
4214                         return -ENODEV;
4215
4216                 goto reinit_after_soft_reset;
4217         }
4218
4219         /* Turn the interrupts on so we can service requests */
4220         h->access.set_intr_mask(h, HPSA_INTR_ON);
4221
4222         hpsa_hba_inquiry(h);
4223         hpsa_register_scsi(h);  /* hook ourselves into SCSI subsystem */
4224         h->busy_initializing = 0;
4225         return 1;
4226
4227 clean4:
4228         hpsa_free_sg_chain_blocks(h);
4229         hpsa_free_cmd_pool(h);
4230         free_irq(h->intr[h->intr_mode], h);
4231 clean2:
4232 clean1:
4233         h->busy_initializing = 0;
4234         kfree(h);
4235         return rc;
4236 }
4237
4238 static void hpsa_flush_cache(struct ctlr_info *h)
4239 {
4240         char *flush_buf;
4241         struct CommandList *c;
4242
4243         flush_buf = kzalloc(4, GFP_KERNEL);
4244         if (!flush_buf)
4245                 return;
4246
4247         c = cmd_special_alloc(h);
4248         if (!c) {
4249                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
4250                 goto out_of_memory;
4251         }
4252         fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
4253                 RAID_CTLR_LUNID, TYPE_CMD);
4254         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
4255         if (c->err_info->CommandStatus != 0)
4256                 dev_warn(&h->pdev->dev,
4257                         "error flushing cache on controller\n");
4258         cmd_special_free(h, c);
4259 out_of_memory:
4260         kfree(flush_buf);
4261 }
4262
4263 static void hpsa_shutdown(struct pci_dev *pdev)
4264 {
4265         struct ctlr_info *h;
4266
4267         h = pci_get_drvdata(pdev);
4268         /* Turn board interrupts off  and send the flush cache command
4269          * sendcmd will turn off interrupt, and send the flush...
4270          * To write all data in the battery backed cache to disks
4271          */
4272         hpsa_flush_cache(h);
4273         h->access.set_intr_mask(h, HPSA_INTR_OFF);
4274         free_irq(h->intr[h->intr_mode], h);
4275 #ifdef CONFIG_PCI_MSI
4276         if (h->msix_vector)
4277                 pci_disable_msix(h->pdev);
4278         else if (h->msi_vector)
4279                 pci_disable_msi(h->pdev);
4280 #endif                          /* CONFIG_PCI_MSI */
4281 }
4282
4283 static void __devexit hpsa_remove_one(struct pci_dev *pdev)
4284 {
4285         struct ctlr_info *h;
4286
4287         if (pci_get_drvdata(pdev) == NULL) {
4288                 dev_err(&pdev->dev, "unable to remove device \n");
4289                 return;
4290         }
4291         h = pci_get_drvdata(pdev);
4292         hpsa_unregister_scsi(h);        /* unhook from SCSI subsystem */
4293         hpsa_shutdown(pdev);
4294         iounmap(h->vaddr);
4295         iounmap(h->transtable);
4296         iounmap(h->cfgtable);
4297         hpsa_free_sg_chain_blocks(h);
4298         pci_free_consistent(h->pdev,
4299                 h->nr_cmds * sizeof(struct CommandList),
4300                 h->cmd_pool, h->cmd_pool_dhandle);
4301         pci_free_consistent(h->pdev,
4302                 h->nr_cmds * sizeof(struct ErrorInfo),
4303                 h->errinfo_pool, h->errinfo_pool_dhandle);
4304         pci_free_consistent(h->pdev, h->reply_pool_size,
4305                 h->reply_pool, h->reply_pool_dhandle);
4306         kfree(h->cmd_pool_bits);
4307         kfree(h->blockFetchTable);
4308         kfree(h->hba_inquiry_data);
4309         /*
4310          * Deliberately omit pci_disable_device(): it does something nasty to
4311          * Smart Array controllers that pci_enable_device does not undo
4312          */
4313         pci_release_regions(pdev);
4314         pci_set_drvdata(pdev, NULL);
4315         kfree(h);
4316 }
4317
4318 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
4319         __attribute__((unused)) pm_message_t state)
4320 {
4321         return -ENOSYS;
4322 }
4323
4324 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
4325 {
4326         return -ENOSYS;
4327 }
4328
4329 static struct pci_driver hpsa_pci_driver = {
4330         .name = "hpsa",
4331         .probe = hpsa_init_one,
4332         .remove = __devexit_p(hpsa_remove_one),
4333         .id_table = hpsa_pci_device_id, /* id_table */
4334         .shutdown = hpsa_shutdown,
4335         .suspend = hpsa_suspend,
4336         .resume = hpsa_resume,
4337 };
4338
4339 /* Fill in bucket_map[], given nsgs (the max number of
4340  * scatter gather elements supported) and bucket[],
4341  * which is an array of 8 integers.  The bucket[] array
4342  * contains 8 different DMA transfer sizes (in 16
4343  * byte increments) which the controller uses to fetch
4344  * commands.  This function fills in bucket_map[], which
4345  * maps a given number of scatter gather elements to one of
4346  * the 8 DMA transfer sizes.  The point of it is to allow the
4347  * controller to only do as much DMA as needed to fetch the
4348  * command, with the DMA transfer size encoded in the lower
4349  * bits of the command address.
4350  */
4351 static void  calc_bucket_map(int bucket[], int num_buckets,
4352         int nsgs, int *bucket_map)
4353 {
4354         int i, j, b, size;
4355
4356         /* even a command with 0 SGs requires 4 blocks */
4357 #define MINIMUM_TRANSFER_BLOCKS 4
4358 #define NUM_BUCKETS 8
4359         /* Note, bucket_map must have nsgs+1 entries. */
4360         for (i = 0; i <= nsgs; i++) {
4361                 /* Compute size of a command with i SG entries */
4362                 size = i + MINIMUM_TRANSFER_BLOCKS;
4363                 b = num_buckets; /* Assume the biggest bucket */
4364                 /* Find the bucket that is just big enough */
4365                 for (j = 0; j < 8; j++) {
4366                         if (bucket[j] >= size) {
4367                                 b = j;
4368                                 break;
4369                         }
4370                 }
4371                 /* for a command with i SG entries, use bucket b. */
4372                 bucket_map[i] = b;
4373         }
4374 }
4375
4376 static __devinit void hpsa_enter_performant_mode(struct ctlr_info *h,
4377         u32 use_short_tags)
4378 {
4379         int i;
4380         unsigned long register_value;
4381
4382         /* This is a bit complicated.  There are 8 registers on
4383          * the controller which we write to to tell it 8 different
4384          * sizes of commands which there may be.  It's a way of
4385          * reducing the DMA done to fetch each command.  Encoded into
4386          * each command's tag are 3 bits which communicate to the controller
4387          * which of the eight sizes that command fits within.  The size of
4388          * each command depends on how many scatter gather entries there are.
4389          * Each SG entry requires 16 bytes.  The eight registers are programmed
4390          * with the number of 16-byte blocks a command of that size requires.
4391          * The smallest command possible requires 5 such 16 byte blocks.
4392          * the largest command possible requires MAXSGENTRIES + 4 16-byte
4393          * blocks.  Note, this only extends to the SG entries contained
4394          * within the command block, and does not extend to chained blocks
4395          * of SG elements.   bft[] contains the eight values we write to
4396          * the registers.  They are not evenly distributed, but have more
4397          * sizes for small commands, and fewer sizes for larger commands.
4398          */
4399         int bft[8] = {5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
4400         BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
4401         /*  5 = 1 s/g entry or 4k
4402          *  6 = 2 s/g entry or 8k
4403          *  8 = 4 s/g entry or 16k
4404          * 10 = 6 s/g entry or 24k
4405          */
4406
4407         h->reply_pool_wraparound = 1; /* spec: init to 1 */
4408
4409         /* Controller spec: zero out this buffer. */
4410         memset(h->reply_pool, 0, h->reply_pool_size);
4411         h->reply_pool_head = h->reply_pool;
4412
4413         bft[7] = h->max_sg_entries + 4;
4414         calc_bucket_map(bft, ARRAY_SIZE(bft), 32, h->blockFetchTable);
4415         for (i = 0; i < 8; i++)
4416                 writel(bft[i], &h->transtable->BlockFetch[i]);
4417
4418         /* size of controller ring buffer */
4419         writel(h->max_commands, &h->transtable->RepQSize);
4420         writel(1, &h->transtable->RepQCount);
4421         writel(0, &h->transtable->RepQCtrAddrLow32);
4422         writel(0, &h->transtable->RepQCtrAddrHigh32);
4423         writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
4424         writel(0, &h->transtable->RepQAddr0High32);
4425         writel(CFGTBL_Trans_Performant | use_short_tags,
4426                 &(h->cfgtable->HostWrite.TransportRequest));
4427         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
4428         hpsa_wait_for_mode_change_ack(h);
4429         register_value = readl(&(h->cfgtable->TransportActive));
4430         if (!(register_value & CFGTBL_Trans_Performant)) {
4431                 dev_warn(&h->pdev->dev, "unable to get board into"
4432                                         " performant mode\n");
4433                 return;
4434         }
4435         /* Change the access methods to the performant access methods */
4436         h->access = SA5_performant_access;
4437         h->transMethod = CFGTBL_Trans_Performant;
4438 }
4439
4440 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
4441 {
4442         u32 trans_support;
4443
4444         if (hpsa_simple_mode)
4445                 return;
4446
4447         trans_support = readl(&(h->cfgtable->TransportSupport));
4448         if (!(trans_support & PERFORMANT_MODE))
4449                 return;
4450
4451         hpsa_get_max_perf_mode_cmds(h);
4452         h->max_sg_entries = 32;
4453         /* Performant mode ring buffer and supporting data structures */
4454         h->reply_pool_size = h->max_commands * sizeof(u64);
4455         h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size,
4456                                 &(h->reply_pool_dhandle));
4457
4458         /* Need a block fetch table for performant mode */
4459         h->blockFetchTable = kmalloc(((h->max_sg_entries+1) *
4460                                 sizeof(u32)), GFP_KERNEL);
4461
4462         if ((h->reply_pool == NULL)
4463                 || (h->blockFetchTable == NULL))
4464                 goto clean_up;
4465
4466         hpsa_enter_performant_mode(h,
4467                 trans_support & CFGTBL_Trans_use_short_tags);
4468
4469         return;
4470
4471 clean_up:
4472         if (h->reply_pool)
4473                 pci_free_consistent(h->pdev, h->reply_pool_size,
4474                         h->reply_pool, h->reply_pool_dhandle);
4475         kfree(h->blockFetchTable);
4476 }
4477
4478 /*
4479  *  This is it.  Register the PCI driver information for the cards we control
4480  *  the OS will call our registered routines when it finds one of our cards.
4481  */
4482 static int __init hpsa_init(void)
4483 {
4484         return pci_register_driver(&hpsa_pci_driver);
4485 }
4486
4487 static void __exit hpsa_cleanup(void)
4488 {
4489         pci_unregister_driver(&hpsa_pci_driver);
4490 }
4491
4492 module_init(hpsa_init);
4493 module_exit(hpsa_cleanup);