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/pci-aspm.h>
  27 #include <linux/kernel.h>
  28 #include <linux/slab.h>
  29 #include <linux/delay.h>
  30 #include <linux/fs.h>
  31 #include <linux/timer.h>
  32 #include <linux/seq_file.h>
  33 #include <linux/init.h>
  34 #include <linux/spinlock.h>
  35 #include <linux/compat.h>
  36 #include <linux/blktrace_api.h>
  37 #include <linux/uaccess.h>
  38 #include <linux/io.h>
  39 #include <linux/dma-mapping.h>
  40 #include <linux/completion.h>
  41 #include <linux/moduleparam.h>
  42 #include <scsi/scsi.h>
  43 #include <scsi/scsi_cmnd.h>
  44 #include <scsi/scsi_device.h>
  45 #include <scsi/scsi_host.h>
  46 #include <scsi/scsi_tcq.h>
  47 #include <linux/cciss_ioctl.h>
  48 #include <linux/string.h>
  49 #include <linux/bitmap.h>
  50 #include <asm/atomic.h>
  51 #include <linux/kthread.h>
  52 #include "hpsa_cmd.h"
  53 #include "hpsa.h"
  54
  55 /* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
  56 #define HPSA_DRIVER_VERSION "2.0.2-1"
  57 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
  58
  59 /* How long to wait (in milliseconds) for board to go into simple mode */
  60 #define MAX_CONFIG_WAIT 30000
  61 #define MAX_IOCTL_CONFIG_WAIT 1000
  62
  63 /*define how many times we will try a command because of bus resets */
  64 #define MAX_CMD_RETRIES 3
  65
  66 /* Embedded module documentation macros - see modules.h */
  67 MODULE_AUTHOR("Hewlett-Packard Company");
  68 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
  69         HPSA_DRIVER_VERSION);
  70 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
  71 MODULE_VERSION(HPSA_DRIVER_VERSION);
  72 MODULE_LICENSE("GPL");
  73
  74 static int hpsa_allow_any;
  75 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
  76 MODULE_PARM_DESC(hpsa_allow_any,
  77                 "Allow hpsa driver to access unknown HP Smart Array hardware");
  78 static int hpsa_simple_mode;
  79 module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
  80 MODULE_PARM_DESC(hpsa_simple_mode,
  81         "Use 'simple mode' rather than 'performant mode'");
  82
  83 /* define the PCI info for the cards we can control */
  84 static const struct pci_device_id hpsa_pci_device_id[] = {
  85         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
  86         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
  87         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
  88         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
  89         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
  90         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324a},
  91         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324b},
  92         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
  93         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3350},
  94         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3351},
  95         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3352},
  96         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3353},
  97         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3354},
  98         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
  99         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
 100         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
 101                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 102         {0,}
 103 };
 104
 105 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
 106
 107 /*  board_id = Subsystem Device ID & Vendor ID
 108  *  product = Marketing Name for the board
 109  *  access = Address of the struct of function pointers
 110  */
 111 static struct board_type products[] = {
 112         {0x3241103C, "Smart Array P212", &SA5_access},
 113         {0x3243103C, "Smart Array P410", &SA5_access},
 114         {0x3245103C, "Smart Array P410i", &SA5_access},
 115         {0x3247103C, "Smart Array P411", &SA5_access},
 116         {0x3249103C, "Smart Array P812", &SA5_access},
 117         {0x324a103C, "Smart Array P712m", &SA5_access},
 118         {0x324b103C, "Smart Array P711m", &SA5_access},
 119         {0x3350103C, "Smart Array", &SA5_access},
 120         {0x3351103C, "Smart Array", &SA5_access},
 121         {0x3352103C, "Smart Array", &SA5_access},
 122         {0x3353103C, "Smart Array", &SA5_access},
 123         {0x3354103C, "Smart Array", &SA5_access},
 124         {0x3355103C, "Smart Array", &SA5_access},
 125         {0x3356103C, "Smart Array", &SA5_access},
 126         {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 127 };
 128
 129 static int number_of_controllers;
 130
 131 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
 132 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
 133 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
 134 static void start_io(struct ctlr_info *h);
 135
 136 #ifdef CONFIG_COMPAT
 137 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
 138 #endif
 139
 140 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 141 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
 142 static struct CommandList *cmd_alloc(struct ctlr_info *h);
 143 static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
 144 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 145         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
 146         int cmd_type);
 147
 148 static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 149 static void hpsa_scan_start(struct Scsi_Host *);
 150 static int hpsa_scan_finished(struct Scsi_Host *sh,
 151         unsigned long elapsed_time);
 152 static int hpsa_change_queue_depth(struct scsi_device *sdev,
 153         int qdepth, int reason);
 154
 155 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 156 static int hpsa_slave_alloc(struct scsi_device *sdev);
 157 static void hpsa_slave_destroy(struct scsi_device *sdev);
 158
 159 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
 160 static int check_for_unit_attention(struct ctlr_info *h,
 161         struct CommandList *c);
 162 static void check_ioctl_unit_attention(struct ctlr_info *h,
 163         struct CommandList *c);
 164 /* performant mode helper functions */
 165 static void calc_bucket_map(int *bucket, int num_buckets,
 166         int nsgs, int *bucket_map);
 167 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 168 static inline u32 next_command(struct ctlr_info *h);
 169 static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev,
 170         void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
 171         u64 *cfg_offset);
 172 static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
 173         unsigned long *memory_bar);
 174 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
 175 static int __devinit hpsa_wait_for_board_state(struct pci_dev *pdev,
 176         void __iomem *vaddr, int wait_for_ready);
 177 #define BOARD_NOT_READY 0
 178 #define BOARD_READY 1
 179
 180 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 181 {
 182         unsigned long *priv = shost_priv(sdev->host);
 183         return (struct ctlr_info *) *priv;
 184 }
 185
 186 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 187 {
 188         unsigned long *priv = shost_priv(sh);
 189         return (struct ctlr_info *) *priv;
 190 }
 191
 192 static int check_for_unit_attention(struct ctlr_info *h,
 193         struct CommandList *c)
 194 {
 195         if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
 196                 return 0;
 197
 198         switch (c->err_info->SenseInfo[12]) {
 199         case STATE_CHANGED:
 200                 dev_warn(&h->pdev->dev, "hpsa%d: a state change "
 201                         "detected, command retried\n", h->ctlr);
 202                 break;
 203         case LUN_FAILED:
 204                 dev_warn(&h->pdev->dev, "hpsa%d: LUN failure "
 205                         "detected, action required\n", h->ctlr);
 206                 break;
 207         case REPORT_LUNS_CHANGED:
 208                 dev_warn(&h->pdev->dev, "hpsa%d: report LUN data "
 209                         "changed, action required\n", h->ctlr);
 210         /*
 211          * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
 212          */
 213                 break;
 214         case POWER_OR_RESET:
 215                 dev_warn(&h->pdev->dev, "hpsa%d: a power on "
 216                         "or device reset detected\n", h->ctlr);
 217                 break;
 218         case UNIT_ATTENTION_CLEARED:
 219                 dev_warn(&h->pdev->dev, "hpsa%d: unit attention "
 220                     "cleared by another initiator\n", h->ctlr);
 221                 break;
 222         default:
 223                 dev_warn(&h->pdev->dev, "hpsa%d: unknown "
 224                         "unit attention detected\n", h->ctlr);
 225                 break;
 226         }
 227         return 1;
 228 }
 229
 230 static ssize_t host_store_rescan(struct device *dev,
 231                                  struct device_attribute *attr,
 232                                  const char *buf, size_t count)
 233 {
 234         struct ctlr_info *h;
 235         struct Scsi_Host *shost = class_to_shost(dev);
 236         h = shost_to_hba(shost);
 237         hpsa_scan_start(h->scsi_host);
 238         return count;
 239 }
 240
 241 static ssize_t host_show_firmware_revision(struct device *dev,
 242              struct device_attribute *attr, char *buf)
 243 {
 244         struct ctlr_info *h;
 245         struct Scsi_Host *shost = class_to_shost(dev);
 246         unsigned char *fwrev;
 247
 248         h = shost_to_hba(shost);
 249         if (!h->hba_inquiry_data)
 250                 return 0;
 251         fwrev = &h->hba_inquiry_data[32];
 252         return snprintf(buf, 20, "%c%c%c%c\n",
 253                 fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
 254 }
 255
 256 static ssize_t host_show_commands_outstanding(struct device *dev,
 257              struct device_attribute *attr, char *buf)
 258 {
 259         struct Scsi_Host *shost = class_to_shost(dev);
 260         struct ctlr_info *h = shost_to_hba(shost);
 261
 262         return snprintf(buf, 20, "%d\n", h->commands_outstanding);
 263 }
 264
 265 static ssize_t host_show_transport_mode(struct device *dev,
 266         struct device_attribute *attr, char *buf)
 267 {
 268         struct ctlr_info *h;
 269         struct Scsi_Host *shost = class_to_shost(dev);
 270
 271         h = shost_to_hba(shost);
 272         return snprintf(buf, 20, "%s\n",
 273                 h->transMethod & CFGTBL_Trans_Performant ?
 274                         "performant" : "simple");
 275 }
 276
 277 /* List of controllers which cannot be hard reset on kexec with reset_devices */
 278 static u32 unresettable_controller[] = {
 279         0x324a103C, /* Smart Array P712m */
 280         0x324b103C, /* SmartArray P711m */
 281         0x3223103C, /* Smart Array P800 */
 282         0x3234103C, /* Smart Array P400 */
 283         0x3235103C, /* Smart Array P400i */
 284         0x3211103C, /* Smart Array E200i */
 285         0x3212103C, /* Smart Array E200 */
 286         0x3213103C, /* Smart Array E200i */
 287         0x3214103C, /* Smart Array E200i */
 288         0x3215103C, /* Smart Array E200i */
 289         0x3237103C, /* Smart Array E500 */
 290         0x323D103C, /* Smart Array P700m */
 291         0x409C0E11, /* Smart Array 6400 */
 292         0x409D0E11, /* Smart Array 6400 EM */
 293 };
 294
 295 /* List of controllers which cannot even be soft reset */
 296 static u32 soft_unresettable_controller[] = {
 297         /* Exclude 640x boards.  These are two pci devices in one slot
 298          * which share a battery backed cache module.  One controls the
 299          * cache, the other accesses the cache through the one that controls
 300          * it.  If we reset the one controlling the cache, the other will
 301          * likely not be happy.  Just forbid resetting this conjoined mess.
 302          * The 640x isn't really supported by hpsa anyway.
 303          */
 304         0x409C0E11, /* Smart Array 6400 */
 305         0x409D0E11, /* Smart Array 6400 EM */
 306 };
 307
 308 static int ctlr_is_hard_resettable(u32 board_id)
 309 {
 310         int i;
 311
 312         for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
 313                 if (unresettable_controller[i] == board_id)
 314                         return 0;
 315         return 1;
 316 }
 317
 318 static int ctlr_is_soft_resettable(u32 board_id)
 319 {
 320         int i;
 321
 322         for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
 323                 if (soft_unresettable_controller[i] == board_id)
 324                         return 0;
 325         return 1;
 326 }
 327
 328 static int ctlr_is_resettable(u32 board_id)
 329 {
 330         return ctlr_is_hard_resettable(board_id) ||
 331                 ctlr_is_soft_resettable(board_id);
 332 }
 333
 334 static ssize_t host_show_resettable(struct device *dev,
 335         struct device_attribute *attr, char *buf)
 336 {
 337         struct ctlr_info *h;
 338         struct Scsi_Host *shost = class_to_shost(dev);
 339
 340         h = shost_to_hba(shost);
 341         return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
 342 }
 343
 344 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 345 {
 346         return (scsi3addr[3] & 0xC0) == 0x40;
 347 }
 348
 349 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 350         "UNKNOWN"
 351 };
 352 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
 353
 354 static ssize_t raid_level_show(struct device *dev,
 355              struct device_attribute *attr, char *buf)
 356 {
 357         ssize_t l = 0;
 358         unsigned char rlevel;
 359         struct ctlr_info *h;
 360         struct scsi_device *sdev;
 361         struct hpsa_scsi_dev_t *hdev;
 362         unsigned long flags;
 363
 364         sdev = to_scsi_device(dev);
 365         h = sdev_to_hba(sdev);
 366         spin_lock_irqsave(&h->lock, flags);
 367         hdev = sdev->hostdata;
 368         if (!hdev) {
 369                 spin_unlock_irqrestore(&h->lock, flags);
 370                 return -ENODEV;
 371         }
 372
 373         /* Is this even a logical drive? */
 374         if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
 375                 spin_unlock_irqrestore(&h->lock, flags);
 376                 l = snprintf(buf, PAGE_SIZE, "N/A\n");
 377                 return l;
 378         }
 379
 380         rlevel = hdev->raid_level;
 381         spin_unlock_irqrestore(&h->lock, flags);
 382         if (rlevel > RAID_UNKNOWN)
 383                 rlevel = RAID_UNKNOWN;
 384         l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 385         return l;
 386 }
 387
 388 static ssize_t lunid_show(struct device *dev,
 389              struct device_attribute *attr, char *buf)
 390 {
 391         struct ctlr_info *h;
 392         struct scsi_device *sdev;
 393         struct hpsa_scsi_dev_t *hdev;
 394         unsigned long flags;
 395         unsigned char lunid[8];
 396
 397         sdev = to_scsi_device(dev);
 398         h = sdev_to_hba(sdev);
 399         spin_lock_irqsave(&h->lock, flags);
 400         hdev = sdev->hostdata;
 401         if (!hdev) {
 402                 spin_unlock_irqrestore(&h->lock, flags);
 403                 return -ENODEV;
 404         }
 405         memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 406         spin_unlock_irqrestore(&h->lock, flags);
 407         return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 408                 lunid[0], lunid[1], lunid[2], lunid[3],
 409                 lunid[4], lunid[5], lunid[6], lunid[7]);
 410 }
 411
 412 static ssize_t unique_id_show(struct device *dev,
 413              struct device_attribute *attr, char *buf)
 414 {
 415         struct ctlr_info *h;
 416         struct scsi_device *sdev;
 417         struct hpsa_scsi_dev_t *hdev;
 418         unsigned long flags;
 419         unsigned char sn[16];
 420
 421         sdev = to_scsi_device(dev);
 422         h = sdev_to_hba(sdev);
 423         spin_lock_irqsave(&h->lock, flags);
 424         hdev = sdev->hostdata;
 425         if (!hdev) {
 426                 spin_unlock_irqrestore(&h->lock, flags);
 427                 return -ENODEV;
 428         }
 429         memcpy(sn, hdev->device_id, sizeof(sn));
 430         spin_unlock_irqrestore(&h->lock, flags);
 431         return snprintf(buf, 16 * 2 + 2,
 432                         "%02X%02X%02X%02X%02X%02X%02X%02X"
 433                         "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 434                         sn[0], sn[1], sn[2], sn[3],
 435                         sn[4], sn[5], sn[6], sn[7],
 436                         sn[8], sn[9], sn[10], sn[11],
 437                         sn[12], sn[13], sn[14], sn[15]);
 438 }
 439
 440 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
 441 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
 442 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
 443 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 444 static DEVICE_ATTR(firmware_revision, S_IRUGO,
 445         host_show_firmware_revision, NULL);
 446 static DEVICE_ATTR(commands_outstanding, S_IRUGO,
 447         host_show_commands_outstanding, NULL);
 448 static DEVICE_ATTR(transport_mode, S_IRUGO,
 449         host_show_transport_mode, NULL);
 450 static DEVICE_ATTR(resettable, S_IRUGO,
 451         host_show_resettable, NULL);
 452
 453 static struct device_attribute *hpsa_sdev_attrs[] = {
 454         &dev_attr_raid_level,
 455         &dev_attr_lunid,
 456         &dev_attr_unique_id,
 457         NULL,
 458 };
 459
 460 static struct device_attribute *hpsa_shost_attrs[] = {
 461         &dev_attr_rescan,
 462         &dev_attr_firmware_revision,
 463         &dev_attr_commands_outstanding,
 464         &dev_attr_transport_mode,
 465         &dev_attr_resettable,
 466         NULL,
 467 };
 468
 469 static struct scsi_host_template hpsa_driver_template = {
 470         .module                 = THIS_MODULE,
 471         .name                   = "hpsa",
 472         .proc_name              = "hpsa",
 473         .queuecommand           = hpsa_scsi_queue_command,
 474         .scan_start             = hpsa_scan_start,
 475         .scan_finished          = hpsa_scan_finished,
 476         .change_queue_depth     = hpsa_change_queue_depth,
 477         .this_id                = -1,
 478         .use_clustering         = ENABLE_CLUSTERING,
 479         .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 480         .ioctl                  = hpsa_ioctl,
 481         .slave_alloc            = hpsa_slave_alloc,
 482         .slave_destroy          = hpsa_slave_destroy,
 483 #ifdef CONFIG_COMPAT
 484         .compat_ioctl           = hpsa_compat_ioctl,
 485 #endif
 486         .sdev_attrs = hpsa_sdev_attrs,
 487         .shost_attrs = hpsa_shost_attrs,
 488 };
 489
 490
 491 /* Enqueuing and dequeuing functions for cmdlists. */
 492 static inline void addQ(struct list_head *list, struct CommandList *c)
 493 {
 494         list_add_tail(&c->list, list);
 495 }
 496
 497 static inline u32 next_command(struct ctlr_info *h)
 498 {
 499         u32 a;
 500
 501         if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
 502                 return h->access.command_completed(h);
 503
 504         if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
 505                 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
 506                 (h->reply_pool_head)++;
 507                 h->commands_outstanding--;
 508         } else {
 509                 a = FIFO_EMPTY;
 510         }
 511         /* Check for wraparound */
 512         if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
 513                 h->reply_pool_head = h->reply_pool;
 514                 h->reply_pool_wraparound ^= 1;
 515         }
 516         return a;
 517 }
 518
 519 /* set_performant_mode: Modify the tag for cciss performant
 520  * set bit 0 for pull model, bits 3-1 for block fetch
 521  * register number
 522  */
 523 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
 524 {
 525         if (likely(h->transMethod & CFGTBL_Trans_Performant))
 526                 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
 527 }
 528
 529 static void enqueue_cmd_and_start_io(struct ctlr_info *h,
 530         struct CommandList *c)
 531 {
 532         unsigned long flags;
 533
 534         set_performant_mode(h, c);
 535         spin_lock_irqsave(&h->lock, flags);
 536         addQ(&h->reqQ, c);
 537         h->Qdepth++;
 538         start_io(h);
 539         spin_unlock_irqrestore(&h->lock, flags);
 540 }
 541
 542 static inline void removeQ(struct CommandList *c)
 543 {
 544         if (WARN_ON(list_empty(&c->list)))
 545                 return;
 546         list_del_init(&c->list);
 547 }
 548
 549 static inline int is_hba_lunid(unsigned char scsi3addr[])
 550 {
 551         return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
 552 }
 553
 554 static inline int is_scsi_rev_5(struct ctlr_info *h)
 555 {
 556         if (!h->hba_inquiry_data)
 557                 return 0;
 558         if ((h->hba_inquiry_data[2] & 0x07) == 5)
 559                 return 1;
 560         return 0;
 561 }
 562
 563 static int hpsa_find_target_lun(struct ctlr_info *h,
 564         unsigned char scsi3addr[], int bus, int *target, int *lun)
 565 {
 566         /* finds an unused bus, target, lun for a new physical device
 567          * assumes h->devlock is held
 568          */
 569         int i, found = 0;
 570         DECLARE_BITMAP(lun_taken, HPSA_MAX_SCSI_DEVS_PER_HBA);
 571
 572         memset(&lun_taken[0], 0, HPSA_MAX_SCSI_DEVS_PER_HBA >> 3);
 573
 574         for (i = 0; i < h->ndevices; i++) {
 575                 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
 576                         set_bit(h->dev[i]->target, lun_taken);
 577         }
 578
 579         for (i = 0; i < HPSA_MAX_SCSI_DEVS_PER_HBA; i++) {
 580                 if (!test_bit(i, lun_taken)) {
 581                         /* *bus = 1; */
 582                         *target = i;
 583                         *lun = 0;
 584                         found = 1;
 585                         break;
 586                 }
 587         }
 588         return !found;
 589 }
 590
 591 /* Add an entry into h->dev[] array. */
 592 static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
 593                 struct hpsa_scsi_dev_t *device,
 594                 struct hpsa_scsi_dev_t *added[], int *nadded)
 595 {
 596         /* assumes h->devlock is held */
 597         int n = h->ndevices;
 598         int i;
 599         unsigned char addr1[8], addr2[8];
 600         struct hpsa_scsi_dev_t *sd;
 601
 602         if (n >= HPSA_MAX_SCSI_DEVS_PER_HBA) {
 603                 dev_err(&h->pdev->dev, "too many devices, some will be "
 604                         "inaccessible.\n");
 605                 return -1;
 606         }
 607
 608         /* physical devices do not have lun or target assigned until now. */
 609         if (device->lun != -1)
 610                 /* Logical device, lun is already assigned. */
 611                 goto lun_assigned;
 612
 613         /* If this device a non-zero lun of a multi-lun device
 614          * byte 4 of the 8-byte LUN addr will contain the logical
 615          * unit no, zero otherise.
 616          */
 617         if (device->scsi3addr[4] == 0) {
 618                 /* This is not a non-zero lun of a multi-lun device */
 619                 if (hpsa_find_target_lun(h, device->scsi3addr,
 620                         device->bus, &device->target, &device->lun) != 0)
 621                         return -1;
 622                 goto lun_assigned;
 623         }
 624
 625         /* This is a non-zero lun of a multi-lun device.
 626          * Search through our list and find the device which
 627          * has the same 8 byte LUN address, excepting byte 4.
 628          * Assign the same bus and target for this new LUN.
 629          * Use the logical unit number from the firmware.
 630          */
 631         memcpy(addr1, device->scsi3addr, 8);
 632         addr1[4] = 0;
 633         for (i = 0; i < n; i++) {
 634                 sd = h->dev[i];
 635                 memcpy(addr2, sd->scsi3addr, 8);
 636                 addr2[4] = 0;
 637                 /* differ only in byte 4? */
 638                 if (memcmp(addr1, addr2, 8) == 0) {
 639                         device->bus = sd->bus;
 640                         device->target = sd->target;
 641                         device->lun = device->scsi3addr[4];
 642                         break;
 643                 }
 644         }
 645         if (device->lun == -1) {
 646                 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
 647                         " suspect firmware bug or unsupported hardware "
 648                         "configuration.\n");
 649                         return -1;
 650         }
 651
 652 lun_assigned:
 653
 654         h->dev[n] = device;
 655         h->ndevices++;
 656         added[*nadded] = device;
 657         (*nadded)++;
 658
 659         /* initially, (before registering with scsi layer) we don't
 660          * know our hostno and we don't want to print anything first
 661          * time anyway (the scsi layer's inquiries will show that info)
 662          */
 663         /* if (hostno != -1) */
 664                 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
 665                         scsi_device_type(device->devtype), hostno,
 666                         device->bus, device->target, device->lun);
 667         return 0;
 668 }
 669
 670 /* Replace an entry from h->dev[] array. */
 671 static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
 672         int entry, struct hpsa_scsi_dev_t *new_entry,
 673         struct hpsa_scsi_dev_t *added[], int *nadded,
 674         struct hpsa_scsi_dev_t *removed[], int *nremoved)
 675 {
 676         /* assumes h->devlock is held */
 677         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
 678         removed[*nremoved] = h->dev[entry];
 679         (*nremoved)++;
 680
 681         /*
 682          * New physical devices won't have target/lun assigned yet
 683          * so we need to preserve the values in the slot we are replacing.
 684          */
 685         if (new_entry->target == -1) {
 686                 new_entry->target = h->dev[entry]->target;
 687                 new_entry->lun = h->dev[entry]->lun;
 688         }
 689
 690         h->dev[entry] = new_entry;
 691         added[*nadded] = new_entry;
 692         (*nadded)++;
 693         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
 694                 scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
 695                         new_entry->target, new_entry->lun);
 696 }
 697
 698 /* Remove an entry from h->dev[] array. */
 699 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
 700         struct hpsa_scsi_dev_t *removed[], int *nremoved)
 701 {
 702         /* assumes h->devlock is held */
 703         int i;
 704         struct hpsa_scsi_dev_t *sd;
 705
 706         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
 707
 708         sd = h->dev[entry];
 709         removed[*nremoved] = h->dev[entry];
 710         (*nremoved)++;
 711
 712         for (i = entry; i < h->ndevices-1; i++)
 713                 h->dev[i] = h->dev[i+1];
 714         h->ndevices--;
 715         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
 716                 scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
 717                 sd->lun);
 718 }
 719
 720 #define SCSI3ADDR_EQ(a, b) ( \
 721         (a)[7] == (b)[7] && \
 722         (a)[6] == (b)[6] && \
 723         (a)[5] == (b)[5] && \
 724         (a)[4] == (b)[4] && \
 725         (a)[3] == (b)[3] && \
 726         (a)[2] == (b)[2] && \
 727         (a)[1] == (b)[1] && \
 728         (a)[0] == (b)[0])
 729
 730 static void fixup_botched_add(struct ctlr_info *h,
 731         struct hpsa_scsi_dev_t *added)
 732 {
 733         /* called when scsi_add_device fails in order to re-adjust
 734          * h->dev[] to match the mid layer's view.
 735          */
 736         unsigned long flags;
 737         int i, j;
 738
 739         spin_lock_irqsave(&h->lock, flags);
 740         for (i = 0; i < h->ndevices; i++) {
 741                 if (h->dev[i] == added) {
 742                         for (j = i; j < h->ndevices-1; j++)
 743                                 h->dev[j] = h->dev[j+1];
 744                         h->ndevices--;
 745                         break;
 746                 }
 747         }
 748         spin_unlock_irqrestore(&h->lock, flags);
 749         kfree(added);
 750 }
 751
 752 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
 753         struct hpsa_scsi_dev_t *dev2)
 754 {
 755         /* we compare everything except lun and target as these
 756          * are not yet assigned.  Compare parts likely
 757          * to differ first
 758          */
 759         if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
 760                 sizeof(dev1->scsi3addr)) != 0)
 761                 return 0;
 762         if (memcmp(dev1->device_id, dev2->device_id,
 763                 sizeof(dev1->device_id)) != 0)
 764                 return 0;
 765         if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
 766                 return 0;
 767         if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
 768                 return 0;
 769         if (dev1->devtype != dev2->devtype)
 770                 return 0;
 771         if (dev1->bus != dev2->bus)
 772                 return 0;
 773         return 1;
 774 }
 775
 776 /* Find needle in haystack.  If exact match found, return DEVICE_SAME,
 777  * and return needle location in *index.  If scsi3addr matches, but not
 778  * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
 779  * location in *index.  If needle not found, return DEVICE_NOT_FOUND.
 780  */
 781 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
 782         struct hpsa_scsi_dev_t *haystack[], int haystack_size,
 783         int *index)
 784 {
 785         int i;
 786 #define DEVICE_NOT_FOUND 0
 787 #define DEVICE_CHANGED 1
 788 #define DEVICE_SAME 2
 789         for (i = 0; i < haystack_size; i++) {
 790                 if (haystack[i] == NULL) /* previously removed. */
 791                         continue;
 792                 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
 793                         *index = i;
 794                         if (device_is_the_same(needle, haystack[i]))
 795                                 return DEVICE_SAME;
 796                         else
 797                                 return DEVICE_CHANGED;
 798                 }
 799         }
 800         *index = -1;
 801         return DEVICE_NOT_FOUND;
 802 }
 803
 804 static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
 805         struct hpsa_scsi_dev_t *sd[], int nsds)
 806 {
 807         /* sd contains scsi3 addresses and devtypes, and inquiry
 808          * data.  This function takes what's in sd to be the current
 809          * reality and updates h->dev[] to reflect that reality.
 810          */
 811         int i, entry, device_change, changes = 0;
 812         struct hpsa_scsi_dev_t *csd;
 813         unsigned long flags;
 814         struct hpsa_scsi_dev_t **added, **removed;
 815         int nadded, nremoved;
 816         struct Scsi_Host *sh = NULL;
 817
 818         added = kzalloc(sizeof(*added) * HPSA_MAX_SCSI_DEVS_PER_HBA,
 819                 GFP_KERNEL);
 820         removed = kzalloc(sizeof(*removed) * HPSA_MAX_SCSI_DEVS_PER_HBA,
 821                 GFP_KERNEL);
 822
 823         if (!added || !removed) {
 824                 dev_warn(&h->pdev->dev, "out of memory in "
 825                         "adjust_hpsa_scsi_table\n");
 826                 goto free_and_out;
 827         }
 828
 829         spin_lock_irqsave(&h->devlock, flags);
 830
 831         /* find any devices in h->dev[] that are not in
 832          * sd[] and remove them from h->dev[], and for any
 833          * devices which have changed, remove the old device
 834          * info and add the new device info.
 835          */
 836         i = 0;
 837         nremoved = 0;
 838         nadded = 0;
 839         while (i < h->ndevices) {
 840                 csd = h->dev[i];
 841                 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
 842                 if (device_change == DEVICE_NOT_FOUND) {
 843                         changes++;
 844                         hpsa_scsi_remove_entry(h, hostno, i,
 845                                 removed, &nremoved);
 846                         continue; /* remove ^^^, hence i not incremented */
 847                 } else if (device_change == DEVICE_CHANGED) {
 848                         changes++;
 849                         hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
 850                                 added, &nadded, removed, &nremoved);
 851                         /* Set it to NULL to prevent it from being freed
 852                          * at the bottom of hpsa_update_scsi_devices()
 853                          */
 854                         sd[entry] = NULL;
 855                 }
 856                 i++;
 857         }
 858
 859         /* Now, make sure every device listed in sd[] is also
 860          * listed in h->dev[], adding them if they aren't found
 861          */
 862
 863         for (i = 0; i < nsds; i++) {
 864                 if (!sd[i]) /* if already added above. */
 865                         continue;
 866                 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
 867                                         h->ndevices, &entry);
 868                 if (device_change == DEVICE_NOT_FOUND) {
 869                         changes++;
 870                         if (hpsa_scsi_add_entry(h, hostno, sd[i],
 871                                 added, &nadded) != 0)
 872                                 break;
 873                         sd[i] = NULL; /* prevent from being freed later. */
 874                 } else if (device_change == DEVICE_CHANGED) {
 875                         /* should never happen... */
 876                         changes++;
 877                         dev_warn(&h->pdev->dev,
 878                                 "device unexpectedly changed.\n");
 879                         /* but if it does happen, we just ignore that device */
 880                 }
 881         }
 882         spin_unlock_irqrestore(&h->devlock, flags);
 883
 884         /* Don't notify scsi mid layer of any changes the first time through
 885          * (or if there are no changes) scsi_scan_host will do it later the
 886          * first time through.
 887          */
 888         if (hostno == -1 || !changes)
 889                 goto free_and_out;
 890
 891         sh = h->scsi_host;
 892         /* Notify scsi mid layer of any removed devices */
 893         for (i = 0; i < nremoved; i++) {
 894                 struct scsi_device *sdev =
 895                         scsi_device_lookup(sh, removed[i]->bus,
 896                                 removed[i]->target, removed[i]->lun);
 897                 if (sdev != NULL) {
 898                         scsi_remove_device(sdev);
 899                         scsi_device_put(sdev);
 900                 } else {
 901                         /* We don't expect to get here.
 902                          * future cmds to this device will get selection
 903                          * timeout as if the device was gone.
 904                          */
 905                         dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
 906                                 " for removal.", hostno, removed[i]->bus,
 907                                 removed[i]->target, removed[i]->lun);
 908                 }
 909                 kfree(removed[i]);
 910                 removed[i] = NULL;
 911         }
 912
 913         /* Notify scsi mid layer of any added devices */
 914         for (i = 0; i < nadded; i++) {
 915                 if (scsi_add_device(sh, added[i]->bus,
 916                         added[i]->target, added[i]->lun) == 0)
 917                         continue;
 918                 dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
 919                         "device not added.\n", hostno, added[i]->bus,
 920                         added[i]->target, added[i]->lun);
 921                 /* now we have to remove it from h->dev,
 922                  * since it didn't get added to scsi mid layer
 923                  */
 924                 fixup_botched_add(h, added[i]);
 925         }
 926
 927 free_and_out:
 928         kfree(added);
 929         kfree(removed);
 930 }
 931
 932 /*
 933  * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
 934  * Assume's h->devlock is held.
 935  */
 936 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
 937         int bus, int target, int lun)
 938 {
 939         int i;
 940         struct hpsa_scsi_dev_t *sd;
 941
 942         for (i = 0; i < h->ndevices; i++) {
 943                 sd = h->dev[i];
 944                 if (sd->bus == bus && sd->target == target && sd->lun == lun)
 945                         return sd;
 946         }
 947         return NULL;
 948 }
 949
 950 /* link sdev->hostdata to our per-device structure. */
 951 static int hpsa_slave_alloc(struct scsi_device *sdev)
 952 {
 953         struct hpsa_scsi_dev_t *sd;
 954         unsigned long flags;
 955         struct ctlr_info *h;
 956
 957         h = sdev_to_hba(sdev);
 958         spin_lock_irqsave(&h->devlock, flags);
 959         sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
 960                 sdev_id(sdev), sdev->lun);
 961         if (sd != NULL)
 962                 sdev->hostdata = sd;
 963         spin_unlock_irqrestore(&h->devlock, flags);
 964         return 0;
 965 }
 966
 967 static void hpsa_slave_destroy(struct scsi_device *sdev)
 968 {
 969         /* nothing to do. */
 970 }
 971
 972 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
 973 {
 974         int i;
 975
 976         if (!h->cmd_sg_list)
 977                 return;
 978         for (i = 0; i < h->nr_cmds; i++) {
 979                 kfree(h->cmd_sg_list[i]);
 980                 h->cmd_sg_list[i] = NULL;
 981         }
 982         kfree(h->cmd_sg_list);
 983         h->cmd_sg_list = NULL;
 984 }
 985
 986 static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
 987 {
 988         int i;
 989
 990         if (h->chainsize <= 0)
 991                 return 0;
 992
 993         h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
 994                                 GFP_KERNEL);
 995         if (!h->cmd_sg_list)
 996                 return -ENOMEM;
 997         for (i = 0; i < h->nr_cmds; i++) {
 998                 h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
 999                                                 h->chainsize, GFP_KERNEL);
1000                 if (!h->cmd_sg_list[i])
1001                         goto clean;
1002         }
1003         return 0;
1004
1005 clean:
1006         hpsa_free_sg_chain_blocks(h);
1007         return -ENOMEM;
1008 }
1009
1010 static void hpsa_map_sg_chain_block(struct ctlr_info *h,
1011         struct CommandList *c)
1012 {
1013         struct SGDescriptor *chain_sg, *chain_block;
1014         u64 temp64;
1015
1016         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1017         chain_block = h->cmd_sg_list[c->cmdindex];
1018         chain_sg->Ext = HPSA_SG_CHAIN;
1019         chain_sg->Len = sizeof(*chain_sg) *
1020                 (c->Header.SGTotal - h->max_cmd_sg_entries);
1021         temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
1022                                 PCI_DMA_TODEVICE);
1023         chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
1024         chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
1025 }
1026
1027 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
1028         struct CommandList *c)
1029 {
1030         struct SGDescriptor *chain_sg;
1031         union u64bit temp64;
1032
1033         if (c->Header.SGTotal <= h->max_cmd_sg_entries)
1034                 return;
1035
1036         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1037         temp64.val32.lower = chain_sg->Addr.lower;
1038         temp64.val32.upper = chain_sg->Addr.upper;
1039         pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
1040 }
1041
1042 static void complete_scsi_command(struct CommandList *cp)
1043 {
1044         struct scsi_cmnd *cmd;
1045         struct ctlr_info *h;
1046         struct ErrorInfo *ei;
1047
1048         unsigned char sense_key;
1049         unsigned char asc;      /* additional sense code */
1050         unsigned char ascq;     /* additional sense code qualifier */
1051         unsigned long sense_data_size;
1052
1053         ei = cp->err_info;
1054         cmd = (struct scsi_cmnd *) cp->scsi_cmd;
1055         h = cp->h;
1056
1057         scsi_dma_unmap(cmd); /* undo the DMA mappings */
1058         if (cp->Header.SGTotal > h->max_cmd_sg_entries)
1059                 hpsa_unmap_sg_chain_block(h, cp);
1060
1061         cmd->result = (DID_OK << 16);           /* host byte */
1062         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
1063         cmd->result |= ei->ScsiStatus;
1064
1065         /* copy the sense data whether we need to or not. */
1066         if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
1067                 sense_data_size = SCSI_SENSE_BUFFERSIZE;
1068         else
1069                 sense_data_size = sizeof(ei->SenseInfo);
1070         if (ei->SenseLen < sense_data_size)
1071                 sense_data_size = ei->SenseLen;
1072
1073         memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
1074         scsi_set_resid(cmd, ei->ResidualCnt);
1075
1076         if (ei->CommandStatus == 0) {
1077                 cmd->scsi_done(cmd);
1078                 cmd_free(h, cp);
1079                 return;
1080         }
1081
1082         /* an error has occurred */
1083         switch (ei->CommandStatus) {
1084
1085         case CMD_TARGET_STATUS:
1086                 if (ei->ScsiStatus) {
1087                         /* Get sense key */
1088                         sense_key = 0xf & ei->SenseInfo[2];
1089                         /* Get additional sense code */
1090                         asc = ei->SenseInfo[12];
1091                         /* Get addition sense code qualifier */
1092                         ascq = ei->SenseInfo[13];
1093                 }
1094
1095                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1096                         if (check_for_unit_attention(h, cp)) {
1097                                 cmd->result = DID_SOFT_ERROR << 16;
1098                                 break;
1099                         }
1100                         if (sense_key == ILLEGAL_REQUEST) {
1101                                 /*
1102                                  * SCSI REPORT_LUNS is commonly unsupported on
1103                                  * Smart Array.  Suppress noisy complaint.
1104                                  */
1105                                 if (cp->Request.CDB[0] == REPORT_LUNS)
1106                                         break;
1107
1108                                 /* If ASC/ASCQ indicate Logical Unit
1109                                  * Not Supported condition,
1110                                  */
1111                                 if ((asc == 0x25) && (ascq == 0x0)) {
1112                                         dev_warn(&h->pdev->dev, "cp %p "
1113                                                 "has check condition\n", cp);
1114                                         break;
1115                                 }
1116                         }
1117
1118                         if (sense_key == NOT_READY) {
1119                                 /* If Sense is Not Ready, Logical Unit
1120                                  * Not ready, Manual Intervention
1121                                  * required
1122                                  */
1123                                 if ((asc == 0x04) && (ascq == 0x03)) {
1124                                         dev_warn(&h->pdev->dev, "cp %p "
1125                                                 "has check condition: unit "
1126                                                 "not ready, manual "
1127                                                 "intervention required\n", cp);
1128                                         break;
1129                                 }
1130                         }
1131                         if (sense_key == ABORTED_COMMAND) {
1132                                 /* Aborted command is retryable */
1133                                 dev_warn(&h->pdev->dev, "cp %p "
1134                                         "has check condition: aborted command: "
1135                                         "ASC: 0x%x, ASCQ: 0x%x\n",
1136                                         cp, asc, ascq);
1137                                 cmd->result = DID_SOFT_ERROR << 16;
1138                                 break;
1139                         }
1140                         /* Must be some other type of check condition */
1141                         dev_warn(&h->pdev->dev, "cp %p has check condition: "
1142                                         "unknown type: "
1143                                         "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1144                                         "Returning result: 0x%x, "
1145                                         "cmd=[%02x %02x %02x %02x %02x "
1146                                         "%02x %02x %02x %02x %02x %02x "
1147                                         "%02x %02x %02x %02x %02x]\n",
1148                                         cp, sense_key, asc, ascq,
1149                                         cmd->result,
1150                                         cmd->cmnd[0], cmd->cmnd[1],
1151                                         cmd->cmnd[2], cmd->cmnd[3],
1152                                         cmd->cmnd[4], cmd->cmnd[5],
1153                                         cmd->cmnd[6], cmd->cmnd[7],
1154                                         cmd->cmnd[8], cmd->cmnd[9],
1155                                         cmd->cmnd[10], cmd->cmnd[11],
1156                                         cmd->cmnd[12], cmd->cmnd[13],
1157                                         cmd->cmnd[14], cmd->cmnd[15]);
1158                         break;
1159                 }
1160
1161
1162                 /* Problem was not a check condition
1163                  * Pass it up to the upper layers...
1164                  */
1165                 if (ei->ScsiStatus) {
1166                         dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1167                                 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1168                                 "Returning result: 0x%x\n",
1169                                 cp, ei->ScsiStatus,
1170                                 sense_key, asc, ascq,
1171                                 cmd->result);
1172                 } else {  /* scsi status is zero??? How??? */
1173                         dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1174                                 "Returning no connection.\n", cp),
1175
1176                         /* Ordinarily, this case should never happen,
1177                          * but there is a bug in some released firmware
1178                          * revisions that allows it to happen if, for
1179                          * example, a 4100 backplane loses power and
1180                          * the tape drive is in it.  We assume that
1181                          * it's a fatal error of some kind because we
1182                          * can't show that it wasn't. We will make it
1183                          * look like selection timeout since that is
1184                          * the most common reason for this to occur,
1185                          * and it's severe enough.
1186                          */
1187
1188                         cmd->result = DID_NO_CONNECT << 16;
1189                 }
1190                 break;
1191
1192         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1193                 break;
1194         case CMD_DATA_OVERRUN:
1195                 dev_warn(&h->pdev->dev, "cp %p has"
1196                         " completed with data overrun "
1197                         "reported\n", cp);
1198                 break;
1199         case CMD_INVALID: {
1200                 /* print_bytes(cp, sizeof(*cp), 1, 0);
1201                 print_cmd(cp); */
1202                 /* We get CMD_INVALID if you address a non-existent device
1203                  * instead of a selection timeout (no response).  You will
1204                  * see this if you yank out a drive, then try to access it.
1205                  * This is kind of a shame because it means that any other
1206                  * CMD_INVALID (e.g. driver bug) will get interpreted as a
1207                  * missing target. */
1208                 cmd->result = DID_NO_CONNECT << 16;
1209         }
1210                 break;
1211         case CMD_PROTOCOL_ERR:
1212                 dev_warn(&h->pdev->dev, "cp %p has "
1213                         "protocol error \n", cp);
1214                 break;
1215         case CMD_HARDWARE_ERR:
1216                 cmd->result = DID_ERROR << 16;
1217                 dev_warn(&h->pdev->dev, "cp %p had  hardware error\n", cp);
1218                 break;
1219         case CMD_CONNECTION_LOST:
1220                 cmd->result = DID_ERROR << 16;
1221                 dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1222                 break;
1223         case CMD_ABORTED:
1224                 cmd->result = DID_ABORT << 16;
1225                 dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1226                                 cp, ei->ScsiStatus);
1227                 break;
1228         case CMD_ABORT_FAILED:
1229                 cmd->result = DID_ERROR << 16;
1230                 dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1231                 break;
1232         case CMD_UNSOLICITED_ABORT:
1233                 cmd->result = DID_RESET << 16;
1234                 dev_warn(&h->pdev->dev, "cp %p aborted do to an unsolicited "
1235                         "abort\n", cp);
1236                 break;
1237         case CMD_TIMEOUT:
1238                 cmd->result = DID_TIME_OUT << 16;
1239                 dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1240                 break;
1241         case CMD_UNABORTABLE:
1242                 cmd->result = DID_ERROR << 16;
1243                 dev_warn(&h->pdev->dev, "Command unabortable\n");
1244                 break;
1245         default:
1246                 cmd->result = DID_ERROR << 16;
1247                 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1248                                 cp, ei->CommandStatus);
1249         }
1250         cmd->scsi_done(cmd);
1251         cmd_free(h, cp);
1252 }
1253
1254 static int hpsa_scsi_detect(struct ctlr_info *h)
1255 {
1256         struct Scsi_Host *sh;
1257         int error;
1258
1259         sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
1260         if (sh == NULL)
1261                 goto fail;
1262
1263         sh->io_port = 0;
1264         sh->n_io_port = 0;
1265         sh->this_id = -1;
1266         sh->max_channel = 3;
1267         sh->max_cmd_len = MAX_COMMAND_SIZE;
1268         sh->max_lun = HPSA_MAX_LUN;
1269         sh->max_id = HPSA_MAX_LUN;
1270         sh->can_queue = h->nr_cmds;
1271         sh->cmd_per_lun = h->nr_cmds;
1272         sh->sg_tablesize = h->maxsgentries;
1273         h->scsi_host = sh;
1274         sh->hostdata[0] = (unsigned long) h;
1275         sh->irq = h->intr[h->intr_mode];
1276         sh->unique_id = sh->irq;
1277         error = scsi_add_host(sh, &h->pdev->dev);
1278         if (error)
1279                 goto fail_host_put;
1280         scsi_scan_host(sh);
1281         return 0;
1282
1283  fail_host_put:
1284         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_add_host"
1285                 " failed for controller %d\n", h->ctlr);
1286         scsi_host_put(sh);
1287         return error;
1288  fail:
1289         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_host_alloc"
1290                 " failed for controller %d\n", h->ctlr);
1291         return -ENOMEM;
1292 }
1293
1294 static void hpsa_pci_unmap(struct pci_dev *pdev,
1295         struct CommandList *c, int sg_used, int data_direction)
1296 {
1297         int i;
1298         union u64bit addr64;
1299
1300         for (i = 0; i < sg_used; i++) {
1301                 addr64.val32.lower = c->SG[i].Addr.lower;
1302                 addr64.val32.upper = c->SG[i].Addr.upper;
1303                 pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1304                         data_direction);
1305         }
1306 }
1307
1308 static void hpsa_map_one(struct pci_dev *pdev,
1309                 struct CommandList *cp,
1310                 unsigned char *buf,
1311                 size_t buflen,
1312                 int data_direction)
1313 {
1314         u64 addr64;
1315
1316         if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1317                 cp->Header.SGList = 0;
1318                 cp->Header.SGTotal = 0;
1319                 return;
1320         }
1321
1322         addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1323         cp->SG[0].Addr.lower =
1324           (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1325         cp->SG[0].Addr.upper =
1326           (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1327         cp->SG[0].Len = buflen;
1328         cp->Header.SGList = (u8) 1;   /* no. SGs contig in this cmd */
1329         cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1330 }
1331
1332 static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1333         struct CommandList *c)
1334 {
1335         DECLARE_COMPLETION_ONSTACK(wait);
1336
1337         c->waiting = &wait;
1338         enqueue_cmd_and_start_io(h, c);
1339         wait_for_completion(&wait);
1340 }
1341
1342 static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1343         struct CommandList *c, int data_direction)
1344 {
1345         int retry_count = 0;
1346
1347         do {
1348                 memset(c->err_info, 0, sizeof(*c->err_info));
1349                 hpsa_scsi_do_simple_cmd_core(h, c);
1350                 retry_count++;
1351         } while (check_for_unit_attention(h, c) && retry_count <= 3);
1352         hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1353 }
1354
1355 static void hpsa_scsi_interpret_error(struct CommandList *cp)
1356 {
1357         struct ErrorInfo *ei;
1358         struct device *d = &cp->h->pdev->dev;
1359
1360         ei = cp->err_info;
1361         switch (ei->CommandStatus) {
1362         case CMD_TARGET_STATUS:
1363                 dev_warn(d, "cmd %p has completed with errors\n", cp);
1364                 dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1365                                 ei->ScsiStatus);
1366                 if (ei->ScsiStatus == 0)
1367                         dev_warn(d, "SCSI status is abnormally zero.  "
1368                         "(probably indicates selection timeout "
1369                         "reported incorrectly due to a known "
1370                         "firmware bug, circa July, 2001.)\n");
1371                 break;
1372         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1373                         dev_info(d, "UNDERRUN\n");
1374                 break;
1375         case CMD_DATA_OVERRUN:
1376                 dev_warn(d, "cp %p has completed with data overrun\n", cp);
1377                 break;
1378         case CMD_INVALID: {
1379                 /* controller unfortunately reports SCSI passthru's
1380                  * to non-existent targets as invalid commands.
1381                  */
1382                 dev_warn(d, "cp %p is reported invalid (probably means "
1383                         "target device no longer present)\n", cp);
1384                 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1385                 print_cmd(cp);  */
1386                 }
1387                 break;
1388         case CMD_PROTOCOL_ERR:
1389                 dev_warn(d, "cp %p has protocol error \n", cp);
1390                 break;
1391         case CMD_HARDWARE_ERR:
1392                 /* cmd->result = DID_ERROR << 16; */
1393                 dev_warn(d, "cp %p had hardware error\n", cp);
1394                 break;
1395         case CMD_CONNECTION_LOST:
1396                 dev_warn(d, "cp %p had connection lost\n", cp);
1397                 break;
1398         case CMD_ABORTED:
1399                 dev_warn(d, "cp %p was aborted\n", cp);
1400                 break;
1401         case CMD_ABORT_FAILED:
1402                 dev_warn(d, "cp %p reports abort failed\n", cp);
1403                 break;
1404         case CMD_UNSOLICITED_ABORT:
1405                 dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1406                 break;
1407         case CMD_TIMEOUT:
1408                 dev_warn(d, "cp %p timed out\n", cp);
1409                 break;
1410         case CMD_UNABORTABLE:
1411                 dev_warn(d, "Command unabortable\n");
1412                 break;
1413         default:
1414                 dev_warn(d, "cp %p returned unknown status %x\n", cp,
1415                                 ei->CommandStatus);
1416         }
1417 }
1418
1419 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1420                         unsigned char page, unsigned char *buf,
1421                         unsigned char bufsize)
1422 {
1423         int rc = IO_OK;
1424         struct CommandList *c;
1425         struct ErrorInfo *ei;
1426
1427         c = cmd_special_alloc(h);
1428
1429         if (c == NULL) {                        /* trouble... */
1430                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1431                 return -ENOMEM;
1432         }
1433
1434         fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD);
1435         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1436         ei = c->err_info;
1437         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1438                 hpsa_scsi_interpret_error(c);
1439                 rc = -1;
1440         }
1441         cmd_special_free(h, c);
1442         return rc;
1443 }
1444
1445 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1446 {
1447         int rc = IO_OK;
1448         struct CommandList *c;
1449         struct ErrorInfo *ei;
1450
1451         c = cmd_special_alloc(h);
1452
1453         if (c == NULL) {                        /* trouble... */
1454                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1455                 return -ENOMEM;
1456         }
1457
1458         fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
1459         hpsa_scsi_do_simple_cmd_core(h, c);
1460         /* no unmap needed here because no data xfer. */
1461
1462         ei = c->err_info;
1463         if (ei->CommandStatus != 0) {
1464                 hpsa_scsi_interpret_error(c);
1465                 rc = -1;
1466         }
1467         cmd_special_free(h, c);
1468         return rc;
1469 }
1470
1471 static void hpsa_get_raid_level(struct ctlr_info *h,
1472         unsigned char *scsi3addr, unsigned char *raid_level)
1473 {
1474         int rc;
1475         unsigned char *buf;
1476
1477         *raid_level = RAID_UNKNOWN;
1478         buf = kzalloc(64, GFP_KERNEL);
1479         if (!buf)
1480                 return;
1481         rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1482         if (rc == 0)
1483                 *raid_level = buf[8];
1484         if (*raid_level > RAID_UNKNOWN)
1485                 *raid_level = RAID_UNKNOWN;
1486         kfree(buf);
1487         return;
1488 }
1489
1490 /* Get the device id from inquiry page 0x83 */
1491 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1492         unsigned char *device_id, int buflen)
1493 {
1494         int rc;
1495         unsigned char *buf;
1496
1497         if (buflen > 16)
1498                 buflen = 16;
1499         buf = kzalloc(64, GFP_KERNEL);
1500         if (!buf)
1501                 return -1;
1502         rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1503         if (rc == 0)
1504                 memcpy(device_id, &buf[8], buflen);
1505         kfree(buf);
1506         return rc != 0;
1507 }
1508
1509 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1510                 struct ReportLUNdata *buf, int bufsize,
1511                 int extended_response)
1512 {
1513         int rc = IO_OK;
1514         struct CommandList *c;
1515         unsigned char scsi3addr[8];
1516         struct ErrorInfo *ei;
1517
1518         c = cmd_special_alloc(h);
1519         if (c == NULL) {                        /* trouble... */
1520                 dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1521                 return -1;
1522         }
1523         /* address the controller */
1524         memset(scsi3addr, 0, sizeof(scsi3addr));
1525         fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1526                 buf, bufsize, 0, scsi3addr, TYPE_CMD);
1527         if (extended_response)
1528                 c->Request.CDB[1] = extended_response;
1529         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1530         ei = c->err_info;
1531         if (ei->CommandStatus != 0 &&
1532             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1533                 hpsa_scsi_interpret_error(c);
1534                 rc = -1;
1535         }
1536         cmd_special_free(h, c);
1537         return rc;
1538 }
1539
1540 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1541                 struct ReportLUNdata *buf,
1542                 int bufsize, int extended_response)
1543 {
1544         return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1545 }
1546
1547 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1548                 struct ReportLUNdata *buf, int bufsize)
1549 {
1550         return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1551 }
1552
1553 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1554         int bus, int target, int lun)
1555 {
1556         device->bus = bus;
1557         device->target = target;
1558         device->lun = lun;
1559 }
1560
1561 static int hpsa_update_device_info(struct ctlr_info *h,
1562         unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
1563         unsigned char *is_OBDR_device)
1564 {
1565
1566 #define OBDR_SIG_OFFSET 43
1567 #define OBDR_TAPE_SIG "$DR-10"
1568 #define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
1569 #define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
1570
1571         unsigned char *inq_buff;
1572         unsigned char *obdr_sig;
1573
1574         inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1575         if (!inq_buff)
1576                 goto bail_out;
1577
1578         /* Do an inquiry to the device to see what it is. */
1579         if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1580                 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1581                 /* Inquiry failed (msg printed already) */
1582                 dev_err(&h->pdev->dev,
1583                         "hpsa_update_device_info: inquiry failed\n");
1584                 goto bail_out;
1585         }
1586
1587         this_device->devtype = (inq_buff[0] & 0x1f);
1588         memcpy(this_device->scsi3addr, scsi3addr, 8);
1589         memcpy(this_device->vendor, &inq_buff[8],
1590                 sizeof(this_device->vendor));
1591         memcpy(this_device->model, &inq_buff[16],
1592                 sizeof(this_device->model));
1593         memset(this_device->device_id, 0,
1594                 sizeof(this_device->device_id));
1595         hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1596                 sizeof(this_device->device_id));
1597
1598         if (this_device->devtype == TYPE_DISK &&
1599                 is_logical_dev_addr_mode(scsi3addr))
1600                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1601         else
1602                 this_device->raid_level = RAID_UNKNOWN;
1603
1604         if (is_OBDR_device) {
1605                 /* See if this is a One-Button-Disaster-Recovery device
1606                  * by looking for "$DR-10" at offset 43 in inquiry data.
1607                  */
1608                 obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
1609                 *is_OBDR_device = (this_device->devtype == TYPE_ROM &&
1610                                         strncmp(obdr_sig, OBDR_TAPE_SIG,
1611                                                 OBDR_SIG_LEN) == 0);
1612         }
1613
1614         kfree(inq_buff);
1615         return 0;
1616
1617 bail_out:
1618         kfree(inq_buff);
1619         return 1;
1620 }
1621
1622 static unsigned char *msa2xxx_model[] = {
1623         "MSA2012",
1624         "MSA2024",
1625         "MSA2312",
1626         "MSA2324",
1627         "P2000 G3 SAS",
1628         NULL,
1629 };
1630
1631 static int is_msa2xxx(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1632 {
1633         int i;
1634
1635         for (i = 0; msa2xxx_model[i]; i++)
1636                 if (strncmp(device->model, msa2xxx_model[i],
1637                         strlen(msa2xxx_model[i])) == 0)
1638                         return 1;
1639         return 0;
1640 }
1641
1642 /* Helper function to assign bus, target, lun mapping of devices.
1643  * Puts non-msa2xxx logical volumes on bus 0, msa2xxx logical
1644  * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1645  * Logical drive target and lun are assigned at this time, but
1646  * physical device lun and target assignment are deferred (assigned
1647  * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1648  */
1649 static void figure_bus_target_lun(struct ctlr_info *h,
1650         u8 *lunaddrbytes, int *bus, int *target, int *lun,
1651         struct hpsa_scsi_dev_t *device)
1652 {
1653         u32 lunid;
1654
1655         if (is_logical_dev_addr_mode(lunaddrbytes)) {
1656                 /* logical device */
1657                 if (unlikely(is_scsi_rev_5(h))) {
1658                         /* p1210m, logical drives lun assignments
1659                          * match SCSI REPORT LUNS data.
1660                          */
1661                         lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1662                         *bus = 0;
1663                         *target = 0;
1664                         *lun = (lunid & 0x3fff) + 1;
1665                 } else {
1666                         /* not p1210m... */
1667                         lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1668                         if (is_msa2xxx(h, device)) {
1669                                 /* msa2xxx way, put logicals on bus 1
1670                                  * and match target/lun numbers box
1671                                  * reports.
1672                                  */
1673                                 *bus = 1;
1674                                 *target = (lunid >> 16) & 0x3fff;
1675                                 *lun = lunid & 0x00ff;
1676                         } else {
1677                                 /* Traditional smart array way. */
1678                                 *bus = 0;
1679                                 *lun = 0;
1680                                 *target = lunid & 0x3fff;
1681                         }
1682                 }
1683         } else {
1684                 /* physical device */
1685                 if (is_hba_lunid(lunaddrbytes))
1686                         if (unlikely(is_scsi_rev_5(h))) {
1687                                 *bus = 0; /* put p1210m ctlr at 0,0,0 */
1688                                 *target = 0;
1689                                 *lun = 0;
1690                                 return;
1691                         } else
1692                                 *bus = 3; /* traditional smartarray */
1693                 else
1694                         *bus = 2; /* physical disk */
1695                 *target = -1;
1696                 *lun = -1; /* we will fill these in later. */
1697         }
1698 }
1699
1700 /*
1701  * If there is no lun 0 on a target, linux won't find any devices.
1702  * For the MSA2xxx boxes, we have to manually detect the enclosure
1703  * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1704  * it for some reason.  *tmpdevice is the target we're adding,
1705  * this_device is a pointer into the current element of currentsd[]
1706  * that we're building up in update_scsi_devices(), below.
1707  * lunzerobits is a bitmap that tracks which targets already have a
1708  * lun 0 assigned.
1709  * Returns 1 if an enclosure was added, 0 if not.
1710  */
1711 static int add_msa2xxx_enclosure_device(struct ctlr_info *h,
1712         struct hpsa_scsi_dev_t *tmpdevice,
1713         struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1714         int bus, int target, int lun, unsigned long lunzerobits[],
1715         int *nmsa2xxx_enclosures)
1716 {
1717         unsigned char scsi3addr[8];
1718
1719         if (test_bit(target, lunzerobits))
1720                 return 0; /* There is already a lun 0 on this target. */
1721
1722         if (!is_logical_dev_addr_mode(lunaddrbytes))
1723                 return 0; /* It's the logical targets that may lack lun 0. */
1724
1725         if (!is_msa2xxx(h, tmpdevice))
1726                 return 0; /* It's only the MSA2xxx that have this problem. */
1727
1728         if (lun == 0) /* if lun is 0, then obviously we have a lun 0. */
1729                 return 0;
1730
1731         memset(scsi3addr, 0, 8);
1732         scsi3addr[3] = target;
1733         if (is_hba_lunid(scsi3addr))
1734                 return 0; /* Don't add the RAID controller here. */
1735
1736         if (is_scsi_rev_5(h))
1737                 return 0; /* p1210m doesn't need to do this. */
1738
1739 #define MAX_MSA2XXX_ENCLOSURES 32
1740         if (*nmsa2xxx_enclosures >= MAX_MSA2XXX_ENCLOSURES) {
1741                 dev_warn(&h->pdev->dev, "Maximum number of MSA2XXX "
1742                         "enclosures exceeded.  Check your hardware "
1743                         "configuration.");
1744                 return 0;
1745         }
1746
1747         if (hpsa_update_device_info(h, scsi3addr, this_device, NULL))
1748                 return 0;
1749         (*nmsa2xxx_enclosures)++;
1750         hpsa_set_bus_target_lun(this_device, bus, target, 0);
1751         set_bit(target, lunzerobits);
1752         return 1;
1753 }
1754
1755 /*
1756  * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
1757  * logdev.  The number of luns in physdev and logdev are returned in
1758  * *nphysicals and *nlogicals, respectively.
1759  * Returns 0 on success, -1 otherwise.
1760  */
1761 static int hpsa_gather_lun_info(struct ctlr_info *h,
1762         int reportlunsize,
1763         struct ReportLUNdata *physdev, u32 *nphysicals,
1764         struct ReportLUNdata *logdev, u32 *nlogicals)
1765 {
1766         if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1767                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1768                 return -1;
1769         }
1770         *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1771         if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1772                 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1773                         "  %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1774                         *nphysicals - HPSA_MAX_PHYS_LUN);
1775                 *nphysicals = HPSA_MAX_PHYS_LUN;
1776         }
1777         if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1778                 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1779                 return -1;
1780         }
1781         *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1782         /* Reject Logicals in excess of our max capability. */
1783         if (*nlogicals > HPSA_MAX_LUN) {
1784                 dev_warn(&h->pdev->dev,
1785                         "maximum logical LUNs (%d) exceeded.  "
1786                         "%d LUNs ignored.\n", HPSA_MAX_LUN,
1787                         *nlogicals - HPSA_MAX_LUN);
1788                         *nlogicals = HPSA_MAX_LUN;
1789         }
1790         if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1791                 dev_warn(&h->pdev->dev,
1792                         "maximum logical + physical LUNs (%d) exceeded. "
1793                         "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1794                         *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1795                 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1796         }
1797         return 0;
1798 }
1799
1800 u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
1801         int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
1802         struct ReportLUNdata *logdev_list)
1803 {
1804         /* Helper function, figure out where the LUN ID info is coming from
1805          * given index i, lists of physical and logical devices, where in
1806          * the list the raid controller is supposed to appear (first or last)
1807          */
1808
1809         int logicals_start = nphysicals + (raid_ctlr_position == 0);
1810         int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
1811
1812         if (i == raid_ctlr_position)
1813                 return RAID_CTLR_LUNID;
1814
1815         if (i < logicals_start)
1816                 return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];
1817
1818         if (i < last_device)
1819                 return &logdev_list->LUN[i - nphysicals -
1820                         (raid_ctlr_position == 0)][0];
1821         BUG();
1822         return NULL;
1823 }
1824
1825 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1826 {
1827         /* the idea here is we could get notified
1828          * that some devices have changed, so we do a report
1829          * physical luns and report logical luns cmd, and adjust
1830          * our list of devices accordingly.
1831          *
1832          * The scsi3addr's of devices won't change so long as the
1833          * adapter is not reset.  That means we can rescan and
1834          * tell which devices we already know about, vs. new
1835          * devices, vs.  disappearing devices.
1836          */
1837         struct ReportLUNdata *physdev_list = NULL;
1838         struct ReportLUNdata *logdev_list = NULL;
1839         u32 nphysicals = 0;
1840         u32 nlogicals = 0;
1841         u32 ndev_allocated = 0;
1842         struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1843         int ncurrent = 0;
1844         int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1845         int i, nmsa2xxx_enclosures, ndevs_to_allocate;
1846         int bus, target, lun;
1847         int raid_ctlr_position;
1848         DECLARE_BITMAP(lunzerobits, HPSA_MAX_TARGETS_PER_CTLR);
1849
1850         currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_SCSI_DEVS_PER_HBA,
1851                 GFP_KERNEL);
1852         physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1853         logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1854         tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1855
1856         if (!currentsd || !physdev_list || !logdev_list || !tmpdevice) {
1857                 dev_err(&h->pdev->dev, "out of memory\n");
1858                 goto out;
1859         }
1860         memset(lunzerobits, 0, sizeof(lunzerobits));
1861
1862         if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1863                         logdev_list, &nlogicals))
1864                 goto out;
1865
1866         /* We might see up to 32 MSA2xxx enclosures, actually 8 of them
1867          * but each of them 4 times through different paths.  The plus 1
1868          * is for the RAID controller.
1869          */
1870         ndevs_to_allocate = nphysicals + nlogicals + MAX_MSA2XXX_ENCLOSURES + 1;
1871
1872         /* Allocate the per device structures */
1873         for (i = 0; i < ndevs_to_allocate; i++) {
1874                 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1875                 if (!currentsd[i]) {
1876                         dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1877                                 __FILE__, __LINE__);
1878                         goto out;
1879                 }
1880                 ndev_allocated++;
1881         }
1882
1883         if (unlikely(is_scsi_rev_5(h)))
1884                 raid_ctlr_position = 0;
1885         else
1886                 raid_ctlr_position = nphysicals + nlogicals;
1887
1888         /* adjust our table of devices */
1889         nmsa2xxx_enclosures = 0;
1890         for (i = 0; i < nphysicals + nlogicals + 1; i++) {
1891                 u8 *lunaddrbytes, is_OBDR = 0;
1892
1893                 /* Figure out where the LUN ID info is coming from */
1894                 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
1895                         i, nphysicals, nlogicals, physdev_list, logdev_list);
1896                 /* skip masked physical devices. */
1897                 if (lunaddrbytes[3] & 0xC0 &&
1898                         i < nphysicals + (raid_ctlr_position == 0))
1899                         continue;
1900
1901                 /* Get device type, vendor, model, device id */
1902                 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
1903                                                         &is_OBDR))
1904                         continue; /* skip it if we can't talk to it. */
1905                 figure_bus_target_lun(h, lunaddrbytes, &bus, &target, &lun,
1906                         tmpdevice);
1907                 this_device = currentsd[ncurrent];
1908
1909                 /*
1910                  * For the msa2xxx boxes, we have to insert a LUN 0 which
1911                  * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
1912                  * is nonetheless an enclosure device there.  We have to
1913                  * present that otherwise linux won't find anything if
1914                  * there is no lun 0.
1915                  */
1916                 if (add_msa2xxx_enclosure_device(h, tmpdevice, this_device,
1917                                 lunaddrbytes, bus, target, lun, lunzerobits,
1918                                 &nmsa2xxx_enclosures)) {
1919                         ncurrent++;
1920                         this_device = currentsd[ncurrent];
1921                 }
1922
1923                 *this_device = *tmpdevice;
1924                 hpsa_set_bus_target_lun(this_device, bus, target, lun);
1925
1926                 switch (this_device->devtype) {
1927                 case TYPE_ROM:
1928                         /* We don't *really* support actual CD-ROM devices,
1929                          * just "One Button Disaster Recovery" tape drive
1930                          * which temporarily pretends to be a CD-ROM drive.
1931                          * So we check that the device is really an OBDR tape
1932                          * device by checking for "$DR-10" in bytes 43-48 of
1933                          * the inquiry data.
1934                          */
1935                         if (is_OBDR)
1936                                 ncurrent++;
1937                         break;
1938                 case TYPE_DISK:
1939                         if (i < nphysicals)
1940                                 break;
1941                         ncurrent++;
1942                         break;
1943                 case TYPE_TAPE:
1944                 case TYPE_MEDIUM_CHANGER:
1945                         ncurrent++;
1946                         break;
1947                 case TYPE_RAID:
1948                         /* Only present the Smartarray HBA as a RAID controller.
1949                          * If it's a RAID controller other than the HBA itself
1950                          * (an external RAID controller, MSA500 or similar)
1951                          * don't present it.
1952                          */
1953                         if (!is_hba_lunid(lunaddrbytes))
1954                                 break;
1955                         ncurrent++;
1956                         break;
1957                 default:
1958                         break;
1959                 }
1960                 if (ncurrent >= HPSA_MAX_SCSI_DEVS_PER_HBA)
1961                         break;
1962         }
1963         adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
1964 out:
1965         kfree(tmpdevice);
1966         for (i = 0; i < ndev_allocated; i++)
1967                 kfree(currentsd[i]);
1968         kfree(currentsd);
1969         kfree(physdev_list);
1970         kfree(logdev_list);
1971 }
1972
1973 /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1974  * dma mapping  and fills in the scatter gather entries of the
1975  * hpsa command, cp.
1976  */
1977 static int hpsa_scatter_gather(struct ctlr_info *h,
1978                 struct CommandList *cp,
1979                 struct scsi_cmnd *cmd)
1980 {
1981         unsigned int len;
1982         struct scatterlist *sg;
1983         u64 addr64;
1984         int use_sg, i, sg_index, chained;
1985         struct SGDescriptor *curr_sg;
1986
1987         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1988
1989         use_sg = scsi_dma_map(cmd);
1990         if (use_sg < 0)
1991                 return use_sg;
1992
1993         if (!use_sg)
1994                 goto sglist_finished;
1995
1996         curr_sg = cp->SG;
1997         chained = 0;
1998         sg_index = 0;
1999         scsi_for_each_sg(cmd, sg, use_sg, i) {
2000                 if (i == h->max_cmd_sg_entries - 1 &&
2001                         use_sg > h->max_cmd_sg_entries) {
2002                         chained = 1;
2003                         curr_sg = h->cmd_sg_list[cp->cmdindex];
2004                         sg_index = 0;
2005                 }
2006                 addr64 = (u64) sg_dma_address(sg);
2007                 len  = sg_dma_len(sg);
2008                 curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
2009                 curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
2010                 curr_sg->Len = len;
2011                 curr_sg->Ext = 0;  /* we are not chaining */
2012                 curr_sg++;
2013         }
2014
2015         if (use_sg + chained > h->maxSG)
2016                 h->maxSG = use_sg + chained;
2017
2018         if (chained) {
2019                 cp->Header.SGList = h->max_cmd_sg_entries;
2020                 cp->Header.SGTotal = (u16) (use_sg + 1);
2021                 hpsa_map_sg_chain_block(h, cp);
2022                 return 0;
2023         }
2024
2025 sglist_finished:
2026
2027         cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
2028         cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
2029         return 0;
2030 }
2031
2032
2033 static int hpsa_scsi_queue_command_lck(struct scsi_cmnd *cmd,
2034         void (*done)(struct scsi_cmnd *))
2035 {
2036         struct ctlr_info *h;
2037         struct hpsa_scsi_dev_t *dev;
2038         unsigned char scsi3addr[8];
2039         struct CommandList *c;
2040         unsigned long flags;
2041
2042         /* Get the ptr to our adapter structure out of cmd->host. */
2043         h = sdev_to_hba(cmd->device);
2044         dev = cmd->device->hostdata;
2045         if (!dev) {
2046                 cmd->result = DID_NO_CONNECT << 16;
2047                 done(cmd);
2048                 return 0;
2049         }
2050         memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
2051
2052         /* Need a lock as this is being allocated from the pool */
2053         spin_lock_irqsave(&h->lock, flags);
2054         c = cmd_alloc(h);
2055         spin_unlock_irqrestore(&h->lock, flags);
2056         if (c == NULL) {                        /* trouble... */
2057                 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2058                 return SCSI_MLQUEUE_HOST_BUSY;
2059         }
2060
2061         /* Fill in the command list header */
2062
2063         cmd->scsi_done = done;    /* save this for use by completion code */
2064
2065         /* save c in case we have to abort it  */
2066         cmd->host_scribble = (unsigned char *) c;
2067
2068         c->cmd_type = CMD_SCSI;
2069         c->scsi_cmd = cmd;
2070         c->Header.ReplyQueue = 0;  /* unused in simple mode */
2071         memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
2072         c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
2073         c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
2074
2075         /* Fill in the request block... */
2076
2077         c->Request.Timeout = 0;
2078         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
2079         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
2080         c->Request.CDBLen = cmd->cmd_len;
2081         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
2082         c->Request.Type.Type = TYPE_CMD;
2083         c->Request.Type.Attribute = ATTR_SIMPLE;
2084         switch (cmd->sc_data_direction) {
2085         case DMA_TO_DEVICE:
2086                 c->Request.Type.Direction = XFER_WRITE;
2087                 break;
2088         case DMA_FROM_DEVICE:
2089                 c->Request.Type.Direction = XFER_READ;
2090                 break;
2091         case DMA_NONE:
2092                 c->Request.Type.Direction = XFER_NONE;
2093                 break;
2094         case DMA_BIDIRECTIONAL:
2095                 /* This can happen if a buggy application does a scsi passthru
2096                  * and sets both inlen and outlen to non-zero. ( see
2097                  * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
2098                  */
2099
2100                 c->Request.Type.Direction = XFER_RSVD;
2101                 /* This is technically wrong, and hpsa controllers should
2102                  * reject it with CMD_INVALID, which is the most correct
2103                  * response, but non-fibre backends appear to let it
2104                  * slide by, and give the same results as if this field
2105                  * were set correctly.  Either way is acceptable for
2106                  * our purposes here.
2107                  */
2108
2109                 break;
2110
2111         default:
2112                 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
2113                         cmd->sc_data_direction);
2114                 BUG();
2115                 break;
2116         }
2117
2118         if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
2119                 cmd_free(h, c);
2120                 return SCSI_MLQUEUE_HOST_BUSY;
2121         }
2122         enqueue_cmd_and_start_io(h, c);
2123         /* the cmd'll come back via intr handler in complete_scsi_command()  */
2124         return 0;
2125 }
2126
2127 static DEF_SCSI_QCMD(hpsa_scsi_queue_command)
2128
2129 static void hpsa_scan_start(struct Scsi_Host *sh)
2130 {
2131         struct ctlr_info *h = shost_to_hba(sh);
2132         unsigned long flags;
2133
2134         /* wait until any scan already in progress is finished. */
2135         while (1) {
2136                 spin_lock_irqsave(&h->scan_lock, flags);
2137                 if (h->scan_finished)
2138                         break;
2139                 spin_unlock_irqrestore(&h->scan_lock, flags);
2140                 wait_event(h->scan_wait_queue, h->scan_finished);
2141                 /* Note: We don't need to worry about a race between this
2142                  * thread and driver unload because the midlayer will
2143                  * have incremented the reference count, so unload won't
2144                  * happen if we're in here.
2145                  */
2146         }
2147         h->scan_finished = 0; /* mark scan as in progress */
2148         spin_unlock_irqrestore(&h->scan_lock, flags);
2149
2150         hpsa_update_scsi_devices(h, h->scsi_host->host_no);
2151
2152         spin_lock_irqsave(&h->scan_lock, flags);
2153         h->scan_finished = 1; /* mark scan as finished. */
2154         wake_up_all(&h->scan_wait_queue);
2155         spin_unlock_irqrestore(&h->scan_lock, flags);
2156 }
2157
2158 static int hpsa_scan_finished(struct Scsi_Host *sh,
2159         unsigned long elapsed_time)
2160 {
2161         struct ctlr_info *h = shost_to_hba(sh);
2162         unsigned long flags;
2163         int finished;
2164
2165         spin_lock_irqsave(&h->scan_lock, flags);
2166         finished = h->scan_finished;
2167         spin_unlock_irqrestore(&h->scan_lock, flags);
2168         return finished;
2169 }
2170
2171 static int hpsa_change_queue_depth(struct scsi_device *sdev,
2172         int qdepth, int reason)
2173 {
2174         struct ctlr_info *h = sdev_to_hba(sdev);
2175
2176         if (reason != SCSI_QDEPTH_DEFAULT)
2177                 return -ENOTSUPP;
2178
2179         if (qdepth < 1)
2180                 qdepth = 1;
2181         else
2182                 if (qdepth > h->nr_cmds)
2183                         qdepth = h->nr_cmds;
2184         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
2185         return sdev->queue_depth;
2186 }
2187
2188 static void hpsa_unregister_scsi(struct ctlr_info *h)
2189 {
2190         /* we are being forcibly unloaded, and may not refuse. */
2191         scsi_remove_host(h->scsi_host);
2192         scsi_host_put(h->scsi_host);
2193         h->scsi_host = NULL;
2194 }
2195
2196 static int hpsa_register_scsi(struct ctlr_info *h)
2197 {
2198         int rc;
2199
2200         rc = hpsa_scsi_detect(h);
2201         if (rc != 0)
2202                 dev_err(&h->pdev->dev, "hpsa_register_scsi: failed"
2203                         " hpsa_scsi_detect(), rc is %d\n", rc);
2204         return rc;
2205 }
2206
2207 static int wait_for_device_to_become_ready(struct ctlr_info *h,
2208         unsigned char lunaddr[])
2209 {
2210         int rc = 0;
2211         int count = 0;
2212         int waittime = 1; /* seconds */
2213         struct CommandList *c;
2214
2215         c = cmd_special_alloc(h);
2216         if (!c) {
2217                 dev_warn(&h->pdev->dev, "out of memory in "
2218                         "wait_for_device_to_become_ready.\n");
2219                 return IO_ERROR;
2220         }
2221
2222         /* Send test unit ready until device ready, or give up. */
2223         while (count < HPSA_TUR_RETRY_LIMIT) {
2224
2225                 /* Wait for a bit.  do this first, because if we send
2226                  * the TUR right away, the reset will just abort it.
2227                  */
2228                 msleep(1000 * waittime);
2229                 count++;
2230
2231                 /* Increase wait time with each try, up to a point. */
2232                 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
2233                         waittime = waittime * 2;
2234
2235                 /* Send the Test Unit Ready */
2236                 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD);
2237                 hpsa_scsi_do_simple_cmd_core(h, c);
2238                 /* no unmap needed here because no data xfer. */
2239
2240                 if (c->err_info->CommandStatus == CMD_SUCCESS)
2241                         break;
2242
2243                 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2244                         c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
2245                         (c->err_info->SenseInfo[2] == NO_SENSE ||
2246                         c->err_info->SenseInfo[2] == UNIT_ATTENTION))
2247                         break;
2248
2249                 dev_warn(&h->pdev->dev, "waiting %d secs "
2250                         "for device to become ready.\n", waittime);
2251                 rc = 1; /* device not ready. */
2252         }
2253
2254         if (rc)
2255                 dev_warn(&h->pdev->dev, "giving up on device.\n");
2256         else
2257                 dev_warn(&h->pdev->dev, "device is ready.\n");
2258
2259         cmd_special_free(h, c);
2260         return rc;
2261 }
2262
2263 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
2264  * complaining.  Doing a host- or bus-reset can't do anything good here.
2265  */
2266 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
2267 {
2268         int rc;
2269         struct ctlr_info *h;
2270         struct hpsa_scsi_dev_t *dev;
2271
2272         /* find the controller to which the command to be aborted was sent */
2273         h = sdev_to_hba(scsicmd->device);
2274         if (h == NULL) /* paranoia */
2275                 return FAILED;
2276         dev = scsicmd->device->hostdata;
2277         if (!dev) {
2278                 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2279                         "device lookup failed.\n");
2280                 return FAILED;
2281         }
2282         dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
2283                 h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2284         /* send a reset to the SCSI LUN which the command was sent to */
2285         rc = hpsa_send_reset(h, dev->scsi3addr);
2286         if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2287                 return SUCCESS;
2288
2289         dev_warn(&h->pdev->dev, "resetting device failed.\n");
2290         return FAILED;
2291 }
2292
2293 /*
2294  * For operations that cannot sleep, a command block is allocated at init,
2295  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2296  * which ones are free or in use.  Lock must be held when calling this.
2297  * cmd_free() is the complement.
2298  */
2299 static struct CommandList *cmd_alloc(struct ctlr_info *h)
2300 {
2301         struct CommandList *c;
2302         int i;
2303         union u64bit temp64;
2304         dma_addr_t cmd_dma_handle, err_dma_handle;
2305
2306         do {
2307                 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2308                 if (i == h->nr_cmds)
2309                         return NULL;
2310         } while (test_and_set_bit
2311                  (i & (BITS_PER_LONG - 1),
2312                   h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2313         c = h->cmd_pool + i;
2314         memset(c, 0, sizeof(*c));
2315         cmd_dma_handle = h->cmd_pool_dhandle
2316             + i * sizeof(*c);
2317         c->err_info = h->errinfo_pool + i;
2318         memset(c->err_info, 0, sizeof(*c->err_info));
2319         err_dma_handle = h->errinfo_pool_dhandle
2320             + i * sizeof(*c->err_info);
2321         h->nr_allocs++;
2322
2323         c->cmdindex = i;
2324
2325         INIT_LIST_HEAD(&c->list);
2326         c->busaddr = (u32) cmd_dma_handle;
2327         temp64.val = (u64) err_dma_handle;
2328         c->ErrDesc.Addr.lower = temp64.val32.lower;
2329         c->ErrDesc.Addr.upper = temp64.val32.upper;
2330         c->ErrDesc.Len = sizeof(*c->err_info);
2331
2332         c->h = h;
2333         return c;
2334 }
2335
2336 /* For operations that can wait for kmalloc to possibly sleep,
2337  * this routine can be called. Lock need not be held to call
2338  * cmd_special_alloc. cmd_special_free() is the complement.
2339  */
2340 static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2341 {
2342         struct CommandList *c;
2343         union u64bit temp64;
2344         dma_addr_t cmd_dma_handle, err_dma_handle;
2345
2346         c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2347         if (c == NULL)
2348                 return NULL;
2349         memset(c, 0, sizeof(*c));
2350
2351         c->cmdindex = -1;
2352
2353         c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2354                     &err_dma_handle);
2355
2356         if (c->err_info == NULL) {
2357                 pci_free_consistent(h->pdev,
2358                         sizeof(*c), c, cmd_dma_handle);
2359                 return NULL;
2360         }
2361         memset(c->err_info, 0, sizeof(*c->err_info));
2362
2363         INIT_LIST_HEAD(&c->list);
2364         c->busaddr = (u32) cmd_dma_handle;
2365         temp64.val = (u64) err_dma_handle;
2366         c->ErrDesc.Addr.lower = temp64.val32.lower;
2367         c->ErrDesc.Addr.upper = temp64.val32.upper;
2368         c->ErrDesc.Len = sizeof(*c->err_info);
2369
2370         c->h = h;
2371         return c;
2372 }
2373
2374 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2375 {
2376         int i;
2377
2378         i = c - h->cmd_pool;
2379         clear_bit(i & (BITS_PER_LONG - 1),
2380                   h->cmd_pool_bits + (i / BITS_PER_LONG));
2381         h->nr_frees++;
2382 }
2383
2384 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2385 {
2386         union u64bit temp64;
2387
2388         temp64.val32.lower = c->ErrDesc.Addr.lower;
2389         temp64.val32.upper = c->ErrDesc.Addr.upper;
2390         pci_free_consistent(h->pdev, sizeof(*c->err_info),
2391                             c->err_info, (dma_addr_t) temp64.val);
2392         pci_free_consistent(h->pdev, sizeof(*c),
2393                             c, (dma_addr_t) (c->busaddr & DIRECT_LOOKUP_MASK));
2394 }
2395
2396 #ifdef CONFIG_COMPAT
2397
2398 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2399 {
2400         IOCTL32_Command_struct __user *arg32 =
2401             (IOCTL32_Command_struct __user *) arg;
2402         IOCTL_Command_struct arg64;
2403         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2404         int err;
2405         u32 cp;
2406
2407         memset(&arg64, 0, sizeof(arg64));
2408         err = 0;
2409         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2410                            sizeof(arg64.LUN_info));
2411         err |= copy_from_user(&arg64.Request, &arg32->Request,
2412                            sizeof(arg64.Request));
2413         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2414                            sizeof(arg64.error_info));
2415         err |= get_user(arg64.buf_size, &arg32->buf_size);
2416         err |= get_user(cp, &arg32->buf);
2417         arg64.buf = compat_ptr(cp);
2418         err |= copy_to_user(p, &arg64, sizeof(arg64));
2419
2420         if (err)
2421                 return -EFAULT;
2422
2423         err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2424         if (err)
2425                 return err;
2426         err |= copy_in_user(&arg32->error_info, &p->error_info,
2427                          sizeof(arg32->error_info));
2428         if (err)
2429                 return -EFAULT;
2430         return err;
2431 }
2432
2433 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2434         int cmd, void *arg)
2435 {
2436         BIG_IOCTL32_Command_struct __user *arg32 =
2437             (BIG_IOCTL32_Command_struct __user *) arg;
2438         BIG_IOCTL_Command_struct arg64;
2439         BIG_IOCTL_Command_struct __user *p =
2440             compat_alloc_user_space(sizeof(arg64));
2441         int err;
2442         u32 cp;
2443
2444         memset(&arg64, 0, sizeof(arg64));
2445         err = 0;
2446         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2447                            sizeof(arg64.LUN_info));
2448         err |= copy_from_user(&arg64.Request, &arg32->Request,
2449                            sizeof(arg64.Request));
2450         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2451                            sizeof(arg64.error_info));
2452         err |= get_user(arg64.buf_size, &arg32->buf_size);
2453         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2454         err |= get_user(cp, &arg32->buf);
2455         arg64.buf = compat_ptr(cp);
2456         err |= copy_to_user(p, &arg64, sizeof(arg64));
2457
2458         if (err)
2459                 return -EFAULT;
2460
2461         err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2462         if (err)
2463                 return err;
2464         err |= copy_in_user(&arg32->error_info, &p->error_info,
2465                          sizeof(arg32->error_info));
2466         if (err)
2467                 return -EFAULT;
2468         return err;
2469 }
2470
2471 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2472 {
2473         switch (cmd) {
2474         case CCISS_GETPCIINFO:
2475         case CCISS_GETINTINFO:
2476         case CCISS_SETINTINFO:
2477         case CCISS_GETNODENAME:
2478         case CCISS_SETNODENAME:
2479         case CCISS_GETHEARTBEAT:
2480         case CCISS_GETBUSTYPES:
2481         case CCISS_GETFIRMVER:
2482         case CCISS_GETDRIVVER:
2483         case CCISS_REVALIDVOLS:
2484         case CCISS_DEREGDISK:
2485         case CCISS_REGNEWDISK:
2486         case CCISS_REGNEWD:
2487         case CCISS_RESCANDISK:
2488         case CCISS_GETLUNINFO:
2489                 return hpsa_ioctl(dev, cmd, arg);
2490
2491         case CCISS_PASSTHRU32:
2492                 return hpsa_ioctl32_passthru(dev, cmd, arg);
2493         case CCISS_BIG_PASSTHRU32:
2494                 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2495
2496         default:
2497                 return -ENOIOCTLCMD;
2498         }
2499 }
2500 #endif
2501
2502 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2503 {
2504         struct hpsa_pci_info pciinfo;
2505
2506         if (!argp)
2507                 return -EINVAL;
2508         pciinfo.domain = pci_domain_nr(h->pdev->bus);
2509         pciinfo.bus = h->pdev->bus->number;
2510         pciinfo.dev_fn = h->pdev->devfn;
2511         pciinfo.board_id = h->board_id;
2512         if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2513                 return -EFAULT;
2514         return 0;
2515 }
2516
2517 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2518 {
2519         DriverVer_type DriverVer;
2520         unsigned char vmaj, vmin, vsubmin;
2521         int rc;
2522
2523         rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2524                 &vmaj, &vmin, &vsubmin);
2525         if (rc != 3) {
2526                 dev_info(&h->pdev->dev, "driver version string '%s' "
2527                         "unrecognized.", HPSA_DRIVER_VERSION);
2528                 vmaj = 0;
2529                 vmin = 0;
2530                 vsubmin = 0;
2531         }
2532         DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2533         if (!argp)
2534                 return -EINVAL;
2535         if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2536                 return -EFAULT;
2537         return 0;
2538 }
2539
2540 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2541 {
2542         IOCTL_Command_struct iocommand;
2543         struct CommandList *c;
2544         char *buff = NULL;
2545         union u64bit temp64;
2546
2547         if (!argp)
2548                 return -EINVAL;
2549         if (!capable(CAP_SYS_RAWIO))
2550                 return -EPERM;
2551         if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2552                 return -EFAULT;
2553         if ((iocommand.buf_size < 1) &&
2554             (iocommand.Request.Type.Direction != XFER_NONE)) {
2555                 return -EINVAL;
2556         }
2557         if (iocommand.buf_size > 0) {
2558                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2559                 if (buff == NULL)
2560                         return -EFAULT;
2561                 if (iocommand.Request.Type.Direction == XFER_WRITE) {
2562                         /* Copy the data into the buffer we created */
2563                         if (copy_from_user(buff, iocommand.buf,
2564                                 iocommand.buf_size)) {
2565                                 kfree(buff);
2566                                 return -EFAULT;
2567                         }
2568                 } else {
2569                         memset(buff, 0, iocommand.buf_size);
2570                 }
2571         }
2572         c = cmd_special_alloc(h);
2573         if (c == NULL) {
2574                 kfree(buff);
2575                 return -ENOMEM;
2576         }
2577         /* Fill in the command type */
2578         c->cmd_type = CMD_IOCTL_PEND;
2579         /* Fill in Command Header */
2580         c->Header.ReplyQueue = 0; /* unused in simple mode */
2581         if (iocommand.buf_size > 0) {   /* buffer to fill */
2582                 c->Header.SGList = 1;
2583                 c->Header.SGTotal = 1;
2584         } else  { /* no buffers to fill */
2585                 c->Header.SGList = 0;
2586                 c->Header.SGTotal = 0;
2587         }
2588         memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
2589         /* use the kernel address the cmd block for tag */
2590         c->Header.Tag.lower = c->busaddr;
2591
2592         /* Fill in Request block */
2593         memcpy(&c->Request, &iocommand.Request,
2594                 sizeof(c->Request));
2595
2596         /* Fill in the scatter gather information */
2597         if (iocommand.buf_size > 0) {
2598                 temp64.val = pci_map_single(h->pdev, buff,
2599                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
2600                 c->SG[0].Addr.lower = temp64.val32.lower;
2601                 c->SG[0].Addr.upper = temp64.val32.upper;
2602                 c->SG[0].Len = iocommand.buf_size;
2603                 c->SG[0].Ext = 0; /* we are not chaining*/
2604         }
2605         hpsa_scsi_do_simple_cmd_core(h, c);
2606         if (iocommand.buf_size > 0)
2607                 hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
2608         check_ioctl_unit_attention(h, c);
2609
2610         /* Copy the error information out */
2611         memcpy(&iocommand.error_info, c->err_info,
2612                 sizeof(iocommand.error_info));
2613         if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
2614                 kfree(buff);
2615                 cmd_special_free(h, c);
2616                 return -EFAULT;
2617         }
2618         if (iocommand.Request.Type.Direction == XFER_READ &&
2619                 iocommand.buf_size > 0) {
2620                 /* Copy the data out of the buffer we created */
2621                 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
2622                         kfree(buff);
2623                         cmd_special_free(h, c);
2624                         return -EFAULT;
2625                 }
2626         }
2627         kfree(buff);
2628         cmd_special_free(h, c);
2629         return 0;
2630 }
2631
2632 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2633 {
2634         BIG_IOCTL_Command_struct *ioc;
2635         struct CommandList *c;
2636         unsigned char **buff = NULL;
2637         int *buff_size = NULL;
2638         union u64bit temp64;
2639         BYTE sg_used = 0;
2640         int status = 0;
2641         int i;
2642         u32 left;
2643         u32 sz;
2644         BYTE __user *data_ptr;
2645
2646         if (!argp)
2647                 return -EINVAL;
2648         if (!capable(CAP_SYS_RAWIO))
2649                 return -EPERM;
2650         ioc = (BIG_IOCTL_Command_struct *)
2651             kmalloc(sizeof(*ioc), GFP_KERNEL);
2652         if (!ioc) {
2653                 status = -ENOMEM;
2654                 goto cleanup1;
2655         }
2656         if (copy_from_user(ioc, argp, sizeof(*ioc))) {
2657                 status = -EFAULT;
2658                 goto cleanup1;
2659         }
2660         if ((ioc->buf_size < 1) &&
2661             (ioc->Request.Type.Direction != XFER_NONE)) {
2662                 status = -EINVAL;
2663                 goto cleanup1;
2664         }
2665         /* Check kmalloc limits  using all SGs */
2666         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
2667                 status = -EINVAL;
2668                 goto cleanup1;
2669         }
2670         if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
2671                 status = -EINVAL;
2672                 goto cleanup1;
2673         }
2674         buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
2675         if (!buff) {
2676                 status = -ENOMEM;
2677                 goto cleanup1;
2678         }
2679         buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
2680         if (!buff_size) {
2681                 status = -ENOMEM;
2682                 goto cleanup1;
2683         }
2684         left = ioc->buf_size;
2685         data_ptr = ioc->buf;
2686         while (left) {
2687                 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
2688                 buff_size[sg_used] = sz;
2689                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
2690                 if (buff[sg_used] == NULL) {
2691                         status = -ENOMEM;
2692                         goto cleanup1;
2693                 }
2694                 if (ioc->Request.Type.Direction == XFER_WRITE) {
2695                         if (copy_from_user(buff[sg_used], data_ptr, sz)) {
2696                                 status = -ENOMEM;
2697                                 goto cleanup1;
2698                         }
2699                 } else
2700                         memset(buff[sg_used], 0, sz);
2701                 left -= sz;
2702                 data_ptr += sz;
2703                 sg_used++;
2704         }
2705         c = cmd_special_alloc(h);
2706         if (c == NULL) {
2707                 status = -ENOMEM;
2708                 goto cleanup1;
2709         }
2710         c->cmd_type = CMD_IOCTL_PEND;
2711         c->Header.ReplyQueue = 0;
2712         c->Header.SGList = c->Header.SGTotal = sg_used;
2713         memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
2714         c->Header.Tag.lower = c->busaddr;
2715         memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
2716         if (ioc->buf_size > 0) {
2717                 int i;
2718                 for (i = 0; i < sg_used; i++) {
2719                         temp64.val = pci_map_single(h->pdev, buff[i],
2720                                     buff_size[i], PCI_DMA_BIDIRECTIONAL);
2721                         c->SG[i].Addr.lower = temp64.val32.lower;
2722                         c->SG[i].Addr.upper = temp64.val32.upper;
2723                         c->SG[i].Len = buff_size[i];
2724                         /* we are not chaining */
2725                         c->SG[i].Ext = 0;
2726                 }
2727         }
2728         hpsa_scsi_do_simple_cmd_core(h, c);
2729         if (sg_used)
2730                 hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
2731         check_ioctl_unit_attention(h, c);
2732         /* Copy the error information out */
2733         memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
2734         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
2735                 cmd_special_free(h, c);
2736                 status = -EFAULT;
2737                 goto cleanup1;
2738         }
2739         if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) {
2740                 /* Copy the data out of the buffer we created */
2741                 BYTE __user *ptr = ioc->buf;
2742                 for (i = 0; i < sg_used; i++) {
2743                         if (copy_to_user(ptr, buff[i], buff_size[i])) {
2744                                 cmd_special_free(h, c);
2745                                 status = -EFAULT;
2746                                 goto cleanup1;
2747                         }
2748                         ptr += buff_size[i];
2749                 }
2750         }
2751         cmd_special_free(h, c);
2752         status = 0;
2753 cleanup1:
2754         if (buff) {
2755                 for (i = 0; i < sg_used; i++)
2756                         kfree(buff[i]);
2757                 kfree(buff);
2758         }
2759         kfree(buff_size);
2760         kfree(ioc);
2761         return status;
2762 }
2763
2764 static void check_ioctl_unit_attention(struct ctlr_info *h,
2765         struct CommandList *c)
2766 {
2767         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2768                         c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
2769                 (void) check_for_unit_attention(h, c);
2770 }
2771 /*
2772  * ioctl
2773  */
2774 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
2775 {
2776         struct ctlr_info *h;
2777         void __user *argp = (void __user *)arg;
2778
2779         h = sdev_to_hba(dev);
2780
2781         switch (cmd) {
2782         case CCISS_DEREGDISK:
2783         case CCISS_REGNEWDISK:
2784         case CCISS_REGNEWD:
2785                 hpsa_scan_start(h->scsi_host);
2786                 return 0;
2787         case CCISS_GETPCIINFO:
2788                 return hpsa_getpciinfo_ioctl(h, argp);
2789         case CCISS_GETDRIVVER:
2790                 return hpsa_getdrivver_ioctl(h, argp);
2791         case CCISS_PASSTHRU:
2792                 return hpsa_passthru_ioctl(h, argp);
2793         case CCISS_BIG_PASSTHRU:
2794                 return hpsa_big_passthru_ioctl(h, argp);
2795         default:
2796                 return -ENOTTY;
2797         }
2798 }
2799
2800 static int __devinit hpsa_send_host_reset(struct ctlr_info *h,
2801         unsigned char *scsi3addr, u8 reset_type)
2802 {
2803         struct CommandList *c;
2804
2805         c = cmd_alloc(h);
2806         if (!c)
2807                 return -ENOMEM;
2808         fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
2809                 RAID_CTLR_LUNID, TYPE_MSG);
2810         c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
2811         c->waiting = NULL;
2812         enqueue_cmd_and_start_io(h, c);
2813         /* Don't wait for completion, the reset won't complete.  Don't free
2814          * the command either.  This is the last command we will send before
2815          * re-initializing everything, so it doesn't matter and won't leak.
2816          */
2817         return 0;
2818 }
2819
2820 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
2821         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
2822         int cmd_type)
2823 {
2824         int pci_dir = XFER_NONE;
2825
2826         c->cmd_type = CMD_IOCTL_PEND;
2827         c->Header.ReplyQueue = 0;
2828         if (buff != NULL && size > 0) {
2829                 c->Header.SGList = 1;
2830                 c->Header.SGTotal = 1;
2831         } else {
2832                 c->Header.SGList = 0;
2833                 c->Header.SGTotal = 0;
2834         }
2835         c->Header.Tag.lower = c->busaddr;
2836         memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2837
2838         c->Request.Type.Type = cmd_type;
2839         if (cmd_type == TYPE_CMD) {
2840                 switch (cmd) {
2841                 case HPSA_INQUIRY:
2842                         /* are we trying to read a vital product page */
2843                         if (page_code != 0) {
2844                                 c->Request.CDB[1] = 0x01;
2845                                 c->Request.CDB[2] = page_code;
2846                         }
2847                         c->Request.CDBLen = 6;
2848                         c->Request.Type.Attribute = ATTR_SIMPLE;
2849                         c->Request.Type.Direction = XFER_READ;
2850                         c->Request.Timeout = 0;
2851                         c->Request.CDB[0] = HPSA_INQUIRY;
2852                         c->Request.CDB[4] = size & 0xFF;
2853                         break;
2854                 case HPSA_REPORT_LOG:
2855                 case HPSA_REPORT_PHYS:
2856                         /* Talking to controller so It's a physical command
2857                            mode = 00 target = 0.  Nothing to write.
2858                          */
2859                         c->Request.CDBLen = 12;
2860                         c->Request.Type.Attribute = ATTR_SIMPLE;
2861                         c->Request.Type.Direction = XFER_READ;
2862                         c->Request.Timeout = 0;
2863                         c->Request.CDB[0] = cmd;
2864                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2865                         c->Request.CDB[7] = (size >> 16) & 0xFF;
2866                         c->Request.CDB[8] = (size >> 8) & 0xFF;
2867                         c->Request.CDB[9] = size & 0xFF;
2868                         break;
2869                 case HPSA_CACHE_FLUSH:
2870                         c->Request.CDBLen = 12;
2871                         c->Request.Type.Attribute = ATTR_SIMPLE;
2872                         c->Request.Type.Direction = XFER_WRITE;
2873                         c->Request.Timeout = 0;
2874                         c->Request.CDB[0] = BMIC_WRITE;
2875                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2876                         break;
2877                 case TEST_UNIT_READY:
2878                         c->Request.CDBLen = 6;
2879                         c->Request.Type.Attribute = ATTR_SIMPLE;
2880                         c->Request.Type.Direction = XFER_NONE;
2881                         c->Request.Timeout = 0;
2882                         break;
2883                 default:
2884                         dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
2885                         BUG();
2886                         return;
2887                 }
2888         } else if (cmd_type == TYPE_MSG) {
2889                 switch (cmd) {
2890
2891                 case  HPSA_DEVICE_RESET_MSG:
2892                         c->Request.CDBLen = 16;
2893                         c->Request.Type.Type =  1; /* It is a MSG not a CMD */
2894                         c->Request.Type.Attribute = ATTR_SIMPLE;
2895                         c->Request.Type.Direction = XFER_NONE;
2896                         c->Request.Timeout = 0; /* Don't time out */
2897                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
2898                         c->Request.CDB[0] =  cmd;
2899                         c->Request.CDB[1] = 0x03;  /* Reset target above */
2900                         /* If bytes 4-7 are zero, it means reset the */
2901                         /* LunID device */
2902                         c->Request.CDB[4] = 0x00;
2903                         c->Request.CDB[5] = 0x00;
2904                         c->Request.CDB[6] = 0x00;
2905                         c->Request.CDB[7] = 0x00;
2906                 break;
2907
2908                 default:
2909                         dev_warn(&h->pdev->dev, "unknown message type %d\n",
2910                                 cmd);
2911                         BUG();
2912                 }
2913         } else {
2914                 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
2915                 BUG();
2916         }
2917
2918         switch (c->Request.Type.Direction) {
2919         case XFER_READ:
2920                 pci_dir = PCI_DMA_FROMDEVICE;
2921                 break;
2922         case XFER_WRITE:
2923                 pci_dir = PCI_DMA_TODEVICE;
2924                 break;
2925         case XFER_NONE:
2926                 pci_dir = PCI_DMA_NONE;
2927                 break;
2928         default:
2929                 pci_dir = PCI_DMA_BIDIRECTIONAL;
2930         }
2931
2932         hpsa_map_one(h->pdev, c, buff, size, pci_dir);
2933
2934         return;
2935 }
2936
2937 /*
2938  * Map (physical) PCI mem into (virtual) kernel space
2939  */
2940 static void __iomem *remap_pci_mem(ulong base, ulong size)
2941 {
2942         ulong page_base = ((ulong) base) & PAGE_MASK;
2943         ulong page_offs = ((ulong) base) - page_base;
2944         void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2945
2946         return page_remapped ? (page_remapped + page_offs) : NULL;
2947 }
2948
2949 /* Takes cmds off the submission queue and sends them to the hardware,
2950  * then puts them on the queue of cmds waiting for completion.
2951  */
2952 static void start_io(struct ctlr_info *h)
2953 {
2954         struct CommandList *c;
2955
2956         while (!list_empty(&h->reqQ)) {
2957                 c = list_entry(h->reqQ.next, struct CommandList, list);
2958                 /* can't do anything if fifo is full */
2959                 if ((h->access.fifo_full(h))) {
2960                         dev_warn(&h->pdev->dev, "fifo full\n");
2961                         break;
2962                 }
2963
2964                 /* Get the first entry from the Request Q */
2965                 removeQ(c);
2966                 h->Qdepth--;
2967
2968                 /* Tell the controller execute command */
2969                 h->access.submit_command(h, c);
2970
2971                 /* Put job onto the completed Q */
2972                 addQ(&h->cmpQ, c);
2973         }
2974 }
2975
2976 static inline unsigned long get_next_completion(struct ctlr_info *h)
2977 {
2978         return h->access.command_completed(h);
2979 }
2980
2981 static inline bool interrupt_pending(struct ctlr_info *h)
2982 {
2983         return h->access.intr_pending(h);
2984 }
2985
2986 static inline long interrupt_not_for_us(struct ctlr_info *h)
2987 {
2988         return (h->access.intr_pending(h) == 0) ||
2989                 (h->interrupts_enabled == 0);
2990 }
2991
2992 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
2993         u32 raw_tag)
2994 {
2995         if (unlikely(tag_index >= h->nr_cmds)) {
2996                 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
2997                 return 1;
2998         }
2999         return 0;
3000 }
3001
3002 static inline void finish_cmd(struct CommandList *c, u32 raw_tag)
3003 {
3004         removeQ(c);
3005         if (likely(c->cmd_type == CMD_SCSI))
3006                 complete_scsi_command(c);
3007         else if (c->cmd_type == CMD_IOCTL_PEND)
3008                 complete(c->waiting);
3009 }
3010
3011 static inline u32 hpsa_tag_contains_index(u32 tag)
3012 {
3013         return tag & DIRECT_LOOKUP_BIT;
3014 }
3015
3016 static inline u32 hpsa_tag_to_index(u32 tag)
3017 {
3018         return tag >> DIRECT_LOOKUP_SHIFT;
3019 }
3020
3021
3022 static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag)
3023 {
3024 #define HPSA_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
3025 #define HPSA_SIMPLE_ERROR_BITS 0x03
3026         if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
3027                 return tag & ~HPSA_SIMPLE_ERROR_BITS;
3028         return tag & ~HPSA_PERF_ERROR_BITS;
3029 }
3030
3031 /* process completion of an indexed ("direct lookup") command */
3032 static inline u32 process_indexed_cmd(struct ctlr_info *h,
3033         u32 raw_tag)
3034 {
3035         u32 tag_index;
3036         struct CommandList *c;
3037
3038         tag_index = hpsa_tag_to_index(raw_tag);
3039         if (bad_tag(h, tag_index, raw_tag))
3040                 return next_command(h);
3041         c = h->cmd_pool + tag_index;
3042         finish_cmd(c, raw_tag);
3043         return next_command(h);
3044 }
3045
3046 /* process completion of a non-indexed command */
3047 static inline u32 process_nonindexed_cmd(struct ctlr_info *h,
3048         u32 raw_tag)
3049 {
3050         u32 tag;
3051         struct CommandList *c = NULL;
3052
3053         tag = hpsa_tag_discard_error_bits(h, raw_tag);
3054         list_for_each_entry(c, &h->cmpQ, list) {
3055                 if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
3056                         finish_cmd(c, raw_tag);
3057                         return next_command(h);
3058                 }
3059         }
3060         bad_tag(h, h->nr_cmds + 1, raw_tag);
3061         return next_command(h);
3062 }
3063
3064 /* Some controllers, like p400, will give us one interrupt
3065  * after a soft reset, even if we turned interrupts off.
3066  * Only need to check for this in the hpsa_xxx_discard_completions
3067  * functions.
3068  */
3069 static int ignore_bogus_interrupt(struct ctlr_info *h)
3070 {
3071         if (likely(!reset_devices))
3072                 return 0;
3073
3074         if (likely(h->interrupts_enabled))
3075                 return 0;
3076
3077         dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
3078                 "(known firmware bug.)  Ignoring.\n");
3079
3080         return 1;
3081 }
3082
3083 static irqreturn_t hpsa_intx_discard_completions(int irq, void *dev_id)
3084 {
3085         struct ctlr_info *h = dev_id;
3086         unsigned long flags;
3087         u32 raw_tag;
3088
3089         if (ignore_bogus_interrupt(h))
3090                 return IRQ_NONE;
3091
3092         if (interrupt_not_for_us(h))
3093                 return IRQ_NONE;
3094         spin_lock_irqsave(&h->lock, flags);
3095         while (interrupt_pending(h)) {
3096                 raw_tag = get_next_completion(h);
3097                 while (raw_tag != FIFO_EMPTY)
3098                         raw_tag = next_command(h);
3099         }
3100         spin_unlock_irqrestore(&h->lock, flags);
3101         return IRQ_HANDLED;
3102 }
3103
3104 static irqreturn_t hpsa_msix_discard_completions(int irq, void *dev_id)
3105 {
3106         struct ctlr_info *h = dev_id;
3107         unsigned long flags;
3108         u32 raw_tag;
3109
3110         if (ignore_bogus_interrupt(h))
3111                 return IRQ_NONE;
3112
3113         spin_lock_irqsave(&h->lock, flags);
3114         raw_tag = get_next_completion(h);
3115         while (raw_tag != FIFO_EMPTY)
3116                 raw_tag = next_command(h);
3117         spin_unlock_irqrestore(&h->lock, flags);
3118         return IRQ_HANDLED;
3119 }
3120
3121 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id)
3122 {
3123         struct ctlr_info *h = dev_id;
3124         unsigned long flags;
3125         u32 raw_tag;
3126
3127         if (interrupt_not_for_us(h))
3128                 return IRQ_NONE;
3129         spin_lock_irqsave(&h->lock, flags);
3130         while (interrupt_pending(h)) {
3131                 raw_tag = get_next_completion(h);
3132                 while (raw_tag != FIFO_EMPTY) {
3133                         if (hpsa_tag_contains_index(raw_tag))
3134                                 raw_tag = process_indexed_cmd(h, raw_tag);
3135                         else
3136                                 raw_tag = process_nonindexed_cmd(h, raw_tag);
3137                 }
3138         }
3139         spin_unlock_irqrestore(&h->lock, flags);
3140         return IRQ_HANDLED;
3141 }
3142
3143 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id)
3144 {
3145         struct ctlr_info *h = dev_id;
3146         unsigned long flags;
3147         u32 raw_tag;
3148
3149         spin_lock_irqsave(&h->lock, flags);
3150         raw_tag = get_next_completion(h);
3151         while (raw_tag != FIFO_EMPTY) {
3152                 if (hpsa_tag_contains_index(raw_tag))
3153                         raw_tag = process_indexed_cmd(h, raw_tag);
3154                 else
3155                         raw_tag = process_nonindexed_cmd(h, raw_tag);
3156         }
3157         spin_unlock_irqrestore(&h->lock, flags);
3158         return IRQ_HANDLED;
3159 }
3160
3161 /* Send a message CDB to the firmware. Careful, this only works
3162  * in simple mode, not performant mode due to the tag lookup.
3163  * We only ever use this immediately after a controller reset.
3164  */
3165 static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
3166                                                 unsigned char type)
3167 {
3168         struct Command {
3169                 struct CommandListHeader CommandHeader;
3170                 struct RequestBlock Request;
3171                 struct ErrDescriptor ErrorDescriptor;
3172         };
3173         struct Command *cmd;
3174         static const size_t cmd_sz = sizeof(*cmd) +
3175                                         sizeof(cmd->ErrorDescriptor);
3176         dma_addr_t paddr64;
3177         uint32_t paddr32, tag;
3178         void __iomem *vaddr;
3179         int i, err;
3180
3181         vaddr = pci_ioremap_bar(pdev, 0);
3182         if (vaddr == NULL)
3183                 return -ENOMEM;
3184
3185         /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3186          * CCISS commands, so they must be allocated from the lower 4GiB of
3187          * memory.
3188          */
3189         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3190         if (err) {
3191                 iounmap(vaddr);
3192                 return -ENOMEM;
3193         }
3194
3195         cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3196         if (cmd == NULL) {
3197                 iounmap(vaddr);
3198                 return -ENOMEM;
3199         }
3200
3201         /* This must fit, because of the 32-bit consistent DMA mask.  Also,
3202          * although there's no guarantee, we assume that the address is at
3203          * least 4-byte aligned (most likely, it's page-aligned).
3204          */
3205         paddr32 = paddr64;
3206
3207         cmd->CommandHeader.ReplyQueue = 0;
3208         cmd->CommandHeader.SGList = 0;
3209         cmd->CommandHeader.SGTotal = 0;
3210         cmd->CommandHeader.Tag.lower = paddr32;
3211         cmd->CommandHeader.Tag.upper = 0;
3212         memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3213
3214         cmd->Request.CDBLen = 16;
3215         cmd->Request.Type.Type = TYPE_MSG;
3216         cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3217         cmd->Request.Type.Direction = XFER_NONE;
3218         cmd->Request.Timeout = 0; /* Don't time out */
3219         cmd->Request.CDB[0] = opcode;
3220         cmd->Request.CDB[1] = type;
3221         memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
3222         cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
3223         cmd->ErrorDescriptor.Addr.upper = 0;
3224         cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
3225
3226         writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3227
3228         for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
3229                 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3230                 if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr32)
3231                         break;
3232                 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
3233         }
3234
3235         iounmap(vaddr);
3236
3237         /* we leak the DMA buffer here ... no choice since the controller could
3238          *  still complete the command.
3239          */
3240         if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
3241                 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
3242                         opcode, type);
3243                 return -ETIMEDOUT;
3244         }
3245
3246         pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3247
3248         if (tag & HPSA_ERROR_BIT) {
3249                 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
3250                         opcode, type);
3251                 return -EIO;
3252         }
3253
3254         dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
3255                 opcode, type);
3256         return 0;
3257 }
3258
3259 #define hpsa_noop(p) hpsa_message(p, 3, 0)
3260
3261 static int hpsa_controller_hard_reset(struct pci_dev *pdev,
3262         void * __iomem vaddr, u32 use_doorbell)
3263 {
3264         u16 pmcsr;
3265         int pos;
3266
3267         if (use_doorbell) {
3268                 /* For everything after the P600, the PCI power state method
3269                  * of resetting the controller doesn't work, so we have this
3270                  * other way using the doorbell register.
3271                  */
3272                 dev_info(&pdev->dev, "using doorbell to reset controller\n");
3273                 writel(use_doorbell, vaddr + SA5_DOORBELL);
3274         } else { /* Try to do it the PCI power state way */
3275
3276                 /* Quoting from the Open CISS Specification: "The Power
3277                  * Management Control/Status Register (CSR) controls the power
3278                  * state of the device.  The normal operating state is D0,
3279                  * CSR=00h.  The software off state is D3, CSR=03h.  To reset
3280                  * the controller, place the interface device in D3 then to D0,
3281                  * this causes a secondary PCI reset which will reset the
3282                  * controller." */
3283
3284                 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3285                 if (pos == 0) {
3286                         dev_err(&pdev->dev,
3287                                 "hpsa_reset_controller: "
3288                                 "PCI PM not supported\n");
3289                         return -ENODEV;
3290                 }
3291                 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
3292                 /* enter the D3hot power management state */
3293                 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3294                 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3295                 pmcsr |= PCI_D3hot;
3296                 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3297
3298                 msleep(500);
3299
3300                 /* enter the D0 power management state */
3301                 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3302                 pmcsr |= PCI_D0;
3303                 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3304
3305                 /*
3306                  * The P600 requires a small delay when changing states.
3307                  * Otherwise we may think the board did not reset and we bail.
3308                  * This for kdump only and is particular to the P600.
3309                  */
3310                 msleep(500);
3311         }
3312         return 0;
3313 }
3314
3315 static __devinit void init_driver_version(char *driver_version, int len)
3316 {
3317         memset(driver_version, 0, len);
3318         strncpy(driver_version, "hpsa " HPSA_DRIVER_VERSION, len - 1);
3319 }
3320
3321 static __devinit int write_driver_ver_to_cfgtable(
3322         struct CfgTable __iomem *cfgtable)
3323 {
3324         char *driver_version;
3325         int i, size = sizeof(cfgtable->driver_version);
3326
3327         driver_version = kmalloc(size, GFP_KERNEL);
3328         if (!driver_version)
3329                 return -ENOMEM;
3330
3331         init_driver_version(driver_version, size);
3332         for (i = 0; i < size; i++)
3333                 writeb(driver_version[i], &cfgtable->driver_version[i]);
3334         kfree(driver_version);
3335         return 0;
3336 }
3337
3338 static __devinit void read_driver_ver_from_cfgtable(
3339         struct CfgTable __iomem *cfgtable, unsigned char *driver_ver)
3340 {
3341         int i;
3342
3343         for (i = 0; i < sizeof(cfgtable->driver_version); i++)
3344                 driver_ver[i] = readb(&cfgtable->driver_version[i]);
3345 }
3346
3347 static __devinit int controller_reset_failed(
3348         struct CfgTable __iomem *cfgtable)
3349 {
3350
3351         char *driver_ver, *old_driver_ver;
3352         int rc, size = sizeof(cfgtable->driver_version);
3353
3354         old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
3355         if (!old_driver_ver)
3356                 return -ENOMEM;
3357         driver_ver = old_driver_ver + size;
3358
3359         /* After a reset, the 32 bytes of "driver version" in the cfgtable
3360          * should have been changed, otherwise we know the reset failed.
3361          */
3362         init_driver_version(old_driver_ver, size);
3363         read_driver_ver_from_cfgtable(cfgtable, driver_ver);
3364         rc = !memcmp(driver_ver, old_driver_ver, size);
3365         kfree(old_driver_ver);
3366         return rc;
3367 }
3368 /* This does a hard reset of the controller using PCI power management
3369  * states or the using the doorbell register.
3370  */
3371 static __devinit int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
3372 {
3373         u64 cfg_offset;
3374         u32 cfg_base_addr;
3375         u64 cfg_base_addr_index;
3376         void __iomem *vaddr;
3377         unsigned long paddr;
3378         u32 misc_fw_support;
3379         int rc;
3380         struct CfgTable __iomem *cfgtable;
3381         u32 use_doorbell;
3382         u32 board_id;
3383         u16 command_register;
3384
3385         /* For controllers as old as the P600, this is very nearly
3386          * the same thing as
3387          *
3388          * pci_save_state(pci_dev);
3389          * pci_set_power_state(pci_dev, PCI_D3hot);
3390          * pci_set_power_state(pci_dev, PCI_D0);
3391          * pci_restore_state(pci_dev);
3392          *
3393          * For controllers newer than the P600, the pci power state
3394          * method of resetting doesn't work so we have another way
3395          * using the doorbell register.
3396          */
3397
3398         rc = hpsa_lookup_board_id(pdev, &board_id);
3399         if (rc < 0 || !ctlr_is_resettable(board_id)) {
3400                 dev_warn(&pdev->dev, "Not resetting device.\n");
3401                 return -ENODEV;
3402         }
3403
3404         /* if controller is soft- but not hard resettable... */
3405         if (!ctlr_is_hard_resettable(board_id))
3406                 return -ENOTSUPP; /* try soft reset later. */
3407
3408         /* Save the PCI command register */
3409         pci_read_config_word(pdev, 4, &command_register);
3410         /* Turn the board off.  This is so that later pci_restore_state()
3411          * won't turn the board on before the rest of config space is ready.
3412          */
3413         pci_disable_device(pdev);
3414         pci_save_state(pdev);
3415
3416         /* find the first memory BAR, so we can find the cfg table */
3417         rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
3418         if (rc)
3419                 return rc;
3420         vaddr = remap_pci_mem(paddr, 0x250);
3421         if (!vaddr)
3422                 return -ENOMEM;
3423
3424         /* find cfgtable in order to check if reset via doorbell is supported */
3425         rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
3426                                         &cfg_base_addr_index, &cfg_offset);
3427         if (rc)
3428                 goto unmap_vaddr;
3429         cfgtable = remap_pci_mem(pci_resource_start(pdev,
3430                        cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
3431         if (!cfgtable) {
3432                 rc = -ENOMEM;
3433                 goto unmap_vaddr;
3434         }
3435         rc = write_driver_ver_to_cfgtable(cfgtable);
3436         if (rc)
3437                 goto unmap_vaddr;
3438
3439         /* If reset via doorbell register is supported, use that.
3440          * There are two such methods.  Favor the newest method.
3441          */
3442         misc_fw_support = readl(&cfgtable->misc_fw_support);
3443         use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
3444         if (use_doorbell) {
3445                 use_doorbell = DOORBELL_CTLR_RESET2;
3446         } else {
3447                 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
3448                 if (use_doorbell) {
3449                         dev_warn(&pdev->dev, "Controller claims that "
3450                                 "'Bit 2 doorbell reset' is "
3451                                 "supported, but not 'bit 5 doorbell reset'.  "
3452                                 "Firmware update is recommended.\n");
3453                         rc = -ENOTSUPP; /* try soft reset */
3454                         goto unmap_cfgtable;
3455                 }
3456         }
3457
3458         rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
3459         if (rc)
3460                 goto unmap_cfgtable;
3461
3462         pci_restore_state(pdev);
3463         rc = pci_enable_device(pdev);
3464         if (rc) {
3465                 dev_warn(&pdev->dev, "failed to enable device.\n");
3466                 goto unmap_cfgtable;
3467         }
3468         pci_write_config_word(pdev, 4, command_register);
3469
3470         /* Some devices (notably the HP Smart Array 5i Controller)
3471            need a little pause here */
3472         msleep(HPSA_POST_RESET_PAUSE_MSECS);
3473
3474         /* Wait for board to become not ready, then ready. */
3475         dev_info(&pdev->dev, "Waiting for board to reset.\n");
3476         rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
3477         if (rc) {
3478                 dev_warn(&pdev->dev,
3479                         "failed waiting for board to reset."
3480                         " Will try soft reset.\n");
3481                 rc = -ENOTSUPP; /* Not expected, but try soft reset later */
3482                 goto unmap_cfgtable;
3483         }
3484         rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
3485         if (rc) {
3486                 dev_warn(&pdev->dev,
3487                         "failed waiting for board to become ready "
3488                         "after hard reset\n");
3489                 goto unmap_cfgtable;
3490         }
3491
3492         rc = controller_reset_failed(vaddr);
3493         if (rc < 0)
3494                 goto unmap_cfgtable;
3495         if (rc) {
3496                 dev_warn(&pdev->dev, "Unable to successfully reset "
3497                         "controller. Will try soft reset.\n");
3498                 rc = -ENOTSUPP;
3499         } else {
3500                 dev_info(&pdev->dev, "board ready after hard reset.\n");
3501         }
3502
3503 unmap_cfgtable:
3504         iounmap(cfgtable);
3505
3506 unmap_vaddr:
3507         iounmap(vaddr);
3508         return rc;
3509 }
3510
3511 /*
3512  *  We cannot read the structure directly, for portability we must use
3513  *   the io functions.
3514  *   This is for debug only.
3515  */
3516 static void print_cfg_table(struct device *dev, struct CfgTable *tb)
3517 {
3518 #ifdef HPSA_DEBUG
3519         int i;
3520         char temp_name[17];
3521
3522         dev_info(dev, "Controller Configuration information\n");
3523         dev_info(dev, "------------------------------------\n");
3524         for (i = 0; i < 4; i++)
3525                 temp_name[i] = readb(&(tb->Signature[i]));
3526         temp_name[4] = '\0';
3527         dev_info(dev, "   Signature = %s\n", temp_name);
3528         dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
3529         dev_info(dev, "   Transport methods supported = 0x%x\n",
3530                readl(&(tb->TransportSupport)));
3531         dev_info(dev, "   Transport methods active = 0x%x\n",
3532                readl(&(tb->TransportActive)));
3533         dev_info(dev, "   Requested transport Method = 0x%x\n",
3534                readl(&(tb->HostWrite.TransportRequest)));
3535         dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
3536                readl(&(tb->HostWrite.CoalIntDelay)));
3537         dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
3538                readl(&(tb->HostWrite.CoalIntCount)));
3539         dev_info(dev, "   Max outstanding commands = 0x%d\n",
3540                readl(&(tb->CmdsOutMax)));
3541         dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3542         for (i = 0; i < 16; i++)
3543                 temp_name[i] = readb(&(tb->ServerName[i]));
3544         temp_name[16] = '\0';
3545         dev_info(dev, "   Server Name = %s\n", temp_name);
3546         dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
3547                 readl(&(tb->HeartBeat)));
3548 #endif                          /* HPSA_DEBUG */
3549 }
3550
3551 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3552 {
3553         int i, offset, mem_type, bar_type;
3554
3555         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3556                 return 0;
3557         offset = 0;
3558         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3559                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3560                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3561                         offset += 4;
3562                 else {
3563                         mem_type = pci_resource_flags(pdev, i) &
3564                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3565                         switch (mem_type) {
3566                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
3567                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3568                                 offset += 4;    /* 32 bit */
3569                                 break;
3570                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
3571                                 offset += 8;
3572                                 break;
3573                         default:        /* reserved in PCI 2.2 */
3574                                 dev_warn(&pdev->dev,
3575                                        "base address is invalid\n");
3576                                 return -1;
3577                                 break;
3578                         }
3579                 }
3580                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3581                         return i + 1;
3582         }
3583         return -1;
3584 }
3585
3586 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3587  * controllers that are capable. If not, we use IO-APIC mode.
3588  */
3589
3590 static void __devinit hpsa_interrupt_mode(struct ctlr_info *h)
3591 {
3592 #ifdef CONFIG_PCI_MSI
3593         int err;
3594         struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1},
3595         {0, 2}, {0, 3}
3596         };
3597
3598         /* Some boards advertise MSI but don't really support it */
3599         if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
3600             (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
3601                 goto default_int_mode;
3602         if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
3603                 dev_info(&h->pdev->dev, "MSIX\n");
3604                 err = pci_enable_msix(h->pdev, hpsa_msix_entries, 4);
3605                 if (!err) {
3606                         h->intr[0] = hpsa_msix_entries[0].vector;
3607                         h->intr[1] = hpsa_msix_entries[1].vector;
3608                         h->intr[2] = hpsa_msix_entries[2].vector;
3609                         h->intr[3] = hpsa_msix_entries[3].vector;
3610                         h->msix_vector = 1;
3611                         return;
3612                 }
3613                 if (err > 0) {
3614                         dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
3615                                "available\n", err);
3616                         goto default_int_mode;
3617                 } else {
3618                         dev_warn(&h->pdev->dev, "MSI-X init failed %d\n",
3619                                err);
3620                         goto default_int_mode;
3621                 }
3622         }
3623         if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
3624                 dev_info(&h->pdev->dev, "MSI\n");
3625                 if (!pci_enable_msi(h->pdev))
3626                         h->msi_vector = 1;
3627                 else
3628                         dev_warn(&h->pdev->dev, "MSI init failed\n");
3629         }
3630 default_int_mode:
3631 #endif                          /* CONFIG_PCI_MSI */
3632         /* if we get here we're going to use the default interrupt mode */
3633         h->intr[h->intr_mode] = h->pdev->irq;
3634 }
3635
3636 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
3637 {
3638         int i;
3639         u32 subsystem_vendor_id, subsystem_device_id;
3640
3641         subsystem_vendor_id = pdev->subsystem_vendor;
3642         subsystem_device_id = pdev->subsystem_device;
3643         *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
3644                     subsystem_vendor_id;
3645
3646         for (i = 0; i < ARRAY_SIZE(products); i++)
3647                 if (*board_id == products[i].board_id)
3648                         return i;
3649
3650         if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
3651                 subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
3652                 !hpsa_allow_any) {
3653                 dev_warn(&pdev->dev, "unrecognized board ID: "
3654                         "0x%08x, ignoring.\n", *board_id);
3655                         return -ENODEV;
3656         }
3657         return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
3658 }
3659
3660 static inline bool hpsa_board_disabled(struct pci_dev *pdev)
3661 {
3662         u16 command;
3663
3664         (void) pci_read_config_word(pdev, PCI_COMMAND, &command);
3665         return ((command & PCI_COMMAND_MEMORY) == 0);
3666 }
3667
3668 static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
3669         unsigned long *memory_bar)
3670 {
3671         int i;
3672
3673         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
3674                 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
3675                         /* addressing mode bits already removed */
3676                         *memory_bar = pci_resource_start(pdev, i);
3677                         dev_dbg(&pdev->dev, "memory BAR = %lx\n",
3678                                 *memory_bar);
3679                         return 0;
3680                 }
3681         dev_warn(&pdev->dev, "no memory BAR found\n");
3682         return -ENODEV;
3683 }
3684
3685 static int __devinit hpsa_wait_for_board_state(struct pci_dev *pdev,
3686         void __iomem *vaddr, int wait_for_ready)
3687 {
3688         int i, iterations;
3689         u32 scratchpad;
3690         if (wait_for_ready)
3691                 iterations = HPSA_BOARD_READY_ITERATIONS;
3692         else
3693                 iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
3694
3695         for (i = 0; i < iterations; i++) {
3696                 scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
3697                 if (wait_for_ready) {
3698                         if (scratchpad == HPSA_FIRMWARE_READY)
3699                                 return 0;
3700                 } else {
3701                         if (scratchpad != HPSA_FIRMWARE_READY)
3702                                 return 0;
3703                 }
3704                 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
3705         }
3706         dev_warn(&pdev->dev, "board not ready, timed out.\n");
3707         return -ENODEV;
3708 }
3709
3710 static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev,
3711         void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
3712         u64 *cfg_offset)
3713 {
3714         *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
3715         *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
3716         *cfg_base_addr &= (u32) 0x0000ffff;
3717         *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
3718         if (*cfg_base_addr_index == -1) {
3719                 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
3720                 return -ENODEV;
3721         }
3722         return 0;
3723 }
3724
3725 static int __devinit hpsa_find_cfgtables(struct ctlr_info *h)
3726 {
3727         u64 cfg_offset;
3728         u32 cfg_base_addr;
3729         u64 cfg_base_addr_index;
3730         u32 trans_offset;
3731         int rc;
3732
3733         rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
3734                 &cfg_base_addr_index, &cfg_offset);
3735         if (rc)
3736                 return rc;
3737         h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
3738                        cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
3739         if (!h->cfgtable)
3740                 return -ENOMEM;
3741         rc = write_driver_ver_to_cfgtable(h->cfgtable);
3742         if (rc)
3743                 return rc;
3744         /* Find performant mode table. */
3745         trans_offset = readl(&h->cfgtable->TransMethodOffset);
3746         h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
3747                                 cfg_base_addr_index)+cfg_offset+trans_offset,
3748                                 sizeof(*h->transtable));
3749         if (!h->transtable)
3750                 return -ENOMEM;
3751         return 0;
3752 }
3753
3754 static void __devinit hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
3755 {
3756         h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
3757
3758         /* Limit commands in memory limited kdump scenario. */
3759         if (reset_devices && h->max_commands > 32)
3760                 h->max_commands = 32;
3761
3762         if (h->max_commands < 16) {
3763                 dev_warn(&h->pdev->dev, "Controller reports "
3764                         "max supported commands of %d, an obvious lie. "
3765                         "Using 16.  Ensure that firmware is up to date.\n",
3766                         h->max_commands);
3767                 h->max_commands = 16;
3768         }
3769 }
3770
3771 /* Interrogate the hardware for some limits:
3772  * max commands, max SG elements without chaining, and with chaining,
3773  * SG chain block size, etc.
3774  */
3775 static void __devinit hpsa_find_board_params(struct ctlr_info *h)
3776 {
3777         hpsa_get_max_perf_mode_cmds(h);
3778         h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
3779         h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
3780         /*
3781          * Limit in-command s/g elements to 32 save dma'able memory.
3782          * Howvever spec says if 0, use 31
3783          */
3784         h->max_cmd_sg_entries = 31;
3785         if (h->maxsgentries > 512) {
3786                 h->max_cmd_sg_entries = 32;
3787                 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
3788                 h->maxsgentries--; /* save one for chain pointer */
3789         } else {
3790                 h->maxsgentries = 31; /* default to traditional values */
3791                 h->chainsize = 0;
3792         }
3793 }
3794
3795 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
3796 {
3797         if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
3798             (readb(&h->cfgtable->Signature[1]) != 'I') ||
3799             (readb(&h->cfgtable->Signature[2]) != 'S') ||
3800             (readb(&h->cfgtable->Signature[3]) != 'S')) {
3801                 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
3802                 return false;
3803         }
3804         return true;
3805 }
3806
3807 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3808 static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
3809 {
3810 #ifdef CONFIG_X86
3811         u32 prefetch;
3812
3813         prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
3814         prefetch |= 0x100;
3815         writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
3816 #endif
3817 }
3818
3819 /* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
3820  * in a prefetch beyond physical memory.
3821  */
3822 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
3823 {
3824         u32 dma_prefetch;
3825
3826         if (h->board_id != 0x3225103C)
3827                 return;
3828         dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
3829         dma_prefetch |= 0x8000;
3830         writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
3831 }
3832
3833 static void __devinit hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
3834 {
3835         int i;
3836         u32 doorbell_value;
3837         unsigned long flags;
3838
3839         /* under certain very rare conditions, this can take awhile.
3840          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3841          * as we enter this code.)
3842          */
3843         for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3844                 spin_lock_irqsave(&h->lock, flags);
3845                 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
3846                 spin_unlock_irqrestore(&h->lock, flags);
3847                 if (!(doorbell_value & CFGTBL_ChangeReq))
3848                         break;
3849                 /* delay and try again */
3850                 usleep_range(10000, 20000);
3851         }
3852 }
3853
3854 static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h)
3855 {
3856         u32 trans_support;
3857
3858         trans_support = readl(&(h->cfgtable->TransportSupport));
3859         if (!(trans_support & SIMPLE_MODE))
3860                 return -ENOTSUPP;
3861
3862         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3863         /* Update the field, and then ring the doorbell */
3864         writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
3865         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3866         hpsa_wait_for_mode_change_ack(h);
3867         print_cfg_table(&h->pdev->dev, h->cfgtable);
3868         if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3869                 dev_warn(&h->pdev->dev,
3870                         "unable to get board into simple mode\n");
3871                 return -ENODEV;
3872         }
3873         h->transMethod = CFGTBL_Trans_Simple;
3874         return 0;
3875 }
3876
3877 static int __devinit hpsa_pci_init(struct ctlr_info *h)
3878 {
3879         int prod_index, err;
3880
3881         prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
3882         if (prod_index < 0)
3883                 return -ENODEV;
3884         h->product_name = products[prod_index].product_name;
3885         h->access = *(products[prod_index].access);
3886
3887         if (hpsa_board_disabled(h->pdev)) {
3888                 dev_warn(&h->pdev->dev, "controller appears to be disabled\n");
3889                 return -ENODEV;
3890         }
3891
3892         pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
3893                                PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
3894
3895         err = pci_enable_device(h->pdev);
3896         if (err) {
3897                 dev_warn(&h->pdev->dev, "unable to enable PCI device\n");
3898                 return err;
3899         }
3900
3901         err = pci_request_regions(h->pdev, "hpsa");
3902         if (err) {
3903                 dev_err(&h->pdev->dev,
3904                         "cannot obtain PCI resources, aborting\n");
3905                 return err;
3906         }
3907         hpsa_interrupt_mode(h);
3908         err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
3909         if (err)
3910                 goto err_out_free_res;
3911         h->vaddr = remap_pci_mem(h->paddr, 0x250);
3912         if (!h->vaddr) {
3913                 err = -ENOMEM;
3914                 goto err_out_free_res;
3915         }
3916         err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
3917         if (err)
3918                 goto err_out_free_res;
3919         err = hpsa_find_cfgtables(h);
3920         if (err)
3921                 goto err_out_free_res;
3922         hpsa_find_board_params(h);
3923
3924         if (!hpsa_CISS_signature_present(h)) {
3925                 err = -ENODEV;
3926                 goto err_out_free_res;
3927         }
3928         hpsa_enable_scsi_prefetch(h);
3929         hpsa_p600_dma_prefetch_quirk(h);
3930         err = hpsa_enter_simple_mode(h);
3931         if (err)
3932                 goto err_out_free_res;
3933         return 0;
3934
3935 err_out_free_res:
3936         if (h->transtable)
3937                 iounmap(h->transtable);
3938         if (h->cfgtable)
3939                 iounmap(h->cfgtable);
3940         if (h->vaddr)
3941                 iounmap(h->vaddr);
3942         /*
3943          * Deliberately omit pci_disable_device(): it does something nasty to
3944          * Smart Array controllers that pci_enable_device does not undo
3945          */
3946         pci_release_regions(h->pdev);
3947         return err;
3948 }
3949
3950 static void __devinit hpsa_hba_inquiry(struct ctlr_info *h)
3951 {
3952         int rc;
3953
3954 #define HBA_INQUIRY_BYTE_COUNT 64
3955         h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
3956         if (!h->hba_inquiry_data)
3957                 return;
3958         rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
3959                 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
3960         if (rc != 0) {
3961                 kfree(h->hba_inquiry_data);
3962                 h->hba_inquiry_data = NULL;
3963         }
3964 }
3965
3966 static __devinit int hpsa_init_reset_devices(struct pci_dev *pdev)
3967 {
3968         int rc, i;
3969
3970         if (!reset_devices)
3971                 return 0;
3972
3973         /* Reset the controller with a PCI power-cycle or via doorbell */
3974         rc = hpsa_kdump_hard_reset_controller(pdev);
3975
3976         /* -ENOTSUPP here means we cannot reset the controller
3977          * but it's already (and still) up and running in
3978          * "performant mode".  Or, it might be 640x, which can't reset
3979          * due to concerns about shared bbwc between 6402/6404 pair.
3980          */
3981         if (rc == -ENOTSUPP)
3982                 return rc; /* just try to do the kdump anyhow. */
3983         if (rc)
3984                 return -ENODEV;
3985
3986         /* Now try to get the controller to respond to a no-op */
3987         dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
3988         for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
3989                 if (hpsa_noop(pdev) == 0)
3990                         break;
3991                 else
3992                         dev_warn(&pdev->dev, "no-op failed%s\n",
3993                                         (i < 11 ? "; re-trying" : ""));
3994         }
3995         return 0;
3996 }
3997
3998 static __devinit int hpsa_allocate_cmd_pool(struct ctlr_info *h)
3999 {
4000         h->cmd_pool_bits = kzalloc(
4001                 DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) *
4002                 sizeof(unsigned long), GFP_KERNEL);
4003         h->cmd_pool = pci_alloc_consistent(h->pdev,
4004                     h->nr_cmds * sizeof(*h->cmd_pool),
4005                     &(h->cmd_pool_dhandle));
4006         h->errinfo_pool = pci_alloc_consistent(h->pdev,
4007                     h->nr_cmds * sizeof(*h->errinfo_pool),
4008                     &(h->errinfo_pool_dhandle));
4009         if ((h->cmd_pool_bits == NULL)
4010             || (h->cmd_pool == NULL)
4011             || (h->errinfo_pool == NULL)) {
4012                 dev_err(&h->pdev->dev, "out of memory in %s", __func__);
4013                 return -ENOMEM;
4014         }
4015         return 0;
4016 }
4017
4018 static void hpsa_free_cmd_pool(struct ctlr_info *h)
4019 {
4020         kfree(h->cmd_pool_bits);
4021         if (h->cmd_pool)
4022                 pci_free_consistent(h->pdev,
4023                             h->nr_cmds * sizeof(struct CommandList),
4024                             h->cmd_pool, h->cmd_pool_dhandle);
4025         if (h->errinfo_pool)
4026                 pci_free_consistent(h->pdev,
4027                             h->nr_cmds * sizeof(struct ErrorInfo),
4028                             h->errinfo_pool,
4029                             h->errinfo_pool_dhandle);
4030 }
4031
4032 static int hpsa_request_irq(struct ctlr_info *h,
4033         irqreturn_t (*msixhandler)(int, void *),
4034         irqreturn_t (*intxhandler)(int, void *))
4035 {
4036         int rc;
4037
4038         if (h->msix_vector || h->msi_vector)
4039                 rc = request_irq(h->intr[h->intr_mode], msixhandler,
4040                                 IRQF_DISABLED, h->devname, h);
4041         else
4042                 rc = request_irq(h->intr[h->intr_mode], intxhandler,
4043                                 IRQF_DISABLED, h->devname, h);
4044         if (rc) {
4045                 dev_err(&h->pdev->dev, "unable to get irq %d for %s\n",
4046                        h->intr[h->intr_mode], h->devname);
4047                 return -ENODEV;
4048         }
4049         return 0;
4050 }
4051
4052 static int __devinit hpsa_kdump_soft_reset(struct ctlr_info *h)
4053 {
4054         if (hpsa_send_host_reset(h, RAID_CTLR_LUNID,
4055                 HPSA_RESET_TYPE_CONTROLLER)) {
4056                 dev_warn(&h->pdev->dev, "Resetting array controller failed.\n");
4057                 return -EIO;
4058         }
4059
4060         dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
4061         if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) {
4062                 dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
4063                 return -1;
4064         }
4065
4066         dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
4067         if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) {
4068                 dev_warn(&h->pdev->dev, "Board failed to become ready "
4069                         "after soft reset.\n");
4070                 return -1;
4071         }
4072
4073         return 0;
4074 }
4075
4076 static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
4077 {
4078         free_irq(h->intr[h->intr_mode], h);
4079 #ifdef CONFIG_PCI_MSI
4080         if (h->msix_vector)
4081                 pci_disable_msix(h->pdev);
4082         else if (h->msi_vector)
4083                 pci_disable_msi(h->pdev);
4084 #endif /* CONFIG_PCI_MSI */
4085         hpsa_free_sg_chain_blocks(h);
4086         hpsa_free_cmd_pool(h);
4087         kfree(h->blockFetchTable);
4088         pci_free_consistent(h->pdev, h->reply_pool_size,
4089                 h->reply_pool, h->reply_pool_dhandle);
4090         if (h->vaddr)
4091                 iounmap(h->vaddr);
4092         if (h->transtable)
4093                 iounmap(h->transtable);
4094         if (h->cfgtable)
4095                 iounmap(h->cfgtable);
4096         pci_release_regions(h->pdev);
4097         kfree(h);
4098 }
4099
4100 static int __devinit hpsa_init_one(struct pci_dev *pdev,
4101                                     const struct pci_device_id *ent)
4102 {
4103         int dac, rc;
4104         struct ctlr_info *h;
4105         int try_soft_reset = 0;
4106         unsigned long flags;
4107
4108         if (number_of_controllers == 0)
4109                 printk(KERN_INFO DRIVER_NAME "\n");
4110
4111         rc = hpsa_init_reset_devices(pdev);
4112         if (rc) {
4113                 if (rc != -ENOTSUPP)
4114                         return rc;
4115                 /* If the reset fails in a particular way (it has no way to do
4116                  * a proper hard reset, so returns -ENOTSUPP) we can try to do
4117                  * a soft reset once we get the controller configured up to the
4118                  * point that it can accept a command.
4119                  */
4120                 try_soft_reset = 1;
4121                 rc = 0;
4122         }
4123
4124 reinit_after_soft_reset:
4125
4126         /* Command structures must be aligned on a 32-byte boundary because
4127          * the 5 lower bits of the address are used by the hardware. and by
4128          * the driver.  See comments in hpsa.h for more info.
4129          */
4130 #define COMMANDLIST_ALIGNMENT 32
4131         BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
4132         h = kzalloc(sizeof(*h), GFP_KERNEL);
4133         if (!h)
4134                 return -ENOMEM;
4135
4136         h->pdev = pdev;
4137         h->busy_initializing = 1;
4138         h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
4139         INIT_LIST_HEAD(&h->cmpQ);
4140         INIT_LIST_HEAD(&h->reqQ);
4141         spin_lock_init(&h->lock);
4142         spin_lock_init(&h->scan_lock);
4143         rc = hpsa_pci_init(h);
4144         if (rc != 0)
4145                 goto clean1;
4146
4147         sprintf(h->devname, "hpsa%d", number_of_controllers);
4148         h->ctlr = number_of_controllers;
4149         number_of_controllers++;
4150
4151         /* configure PCI DMA stuff */
4152         rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4153         if (rc == 0) {
4154                 dac = 1;
4155         } else {
4156                 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4157                 if (rc == 0) {
4158                         dac = 0;
4159                 } else {
4160                         dev_err(&pdev->dev, "no suitable DMA available\n");
4161                         goto clean1;
4162                 }
4163         }
4164
4165         /* make sure the board interrupts are off */
4166         h->access.set_intr_mask(h, HPSA_INTR_OFF);
4167
4168         if (hpsa_request_irq(h, do_hpsa_intr_msi, do_hpsa_intr_intx))
4169                 goto clean2;
4170         dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
4171                h->devname, pdev->device,
4172                h->intr[h->intr_mode], dac ? "" : " not");
4173         if (hpsa_allocate_cmd_pool(h))
4174                 goto clean4;
4175         if (hpsa_allocate_sg_chain_blocks(h))
4176                 goto clean4;
4177         init_waitqueue_head(&h->scan_wait_queue);
4178         h->scan_finished = 1; /* no scan currently in progress */
4179
4180         pci_set_drvdata(pdev, h);
4181         h->ndevices = 0;
4182         h->scsi_host = NULL;
4183         spin_lock_init(&h->devlock);
4184         hpsa_put_ctlr_into_performant_mode(h);
4185
4186         /* At this point, the controller is ready to take commands.
4187          * Now, if reset_devices and the hard reset didn't work, try
4188          * the soft reset and see if that works.
4189          */
4190         if (try_soft_reset) {
4191
4192                 /* This is kind of gross.  We may or may not get a completion
4193                  * from the soft reset command, and if we do, then the value
4194                  * from the fifo may or may not be valid.  So, we wait 10 secs
4195                  * after the reset throwing away any completions we get during
4196                  * that time.  Unregister the interrupt handler and register
4197                  * fake ones to scoop up any residual completions.
4198                  */
4199                 spin_lock_irqsave(&h->lock, flags);
4200                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4201                 spin_unlock_irqrestore(&h->lock, flags);
4202                 free_irq(h->intr[h->intr_mode], h);
4203                 rc = hpsa_request_irq(h, hpsa_msix_discard_completions,
4204                                         hpsa_intx_discard_completions);
4205                 if (rc) {
4206                         dev_warn(&h->pdev->dev, "Failed to request_irq after "
4207                                 "soft reset.\n");
4208                         goto clean4;
4209                 }
4210
4211                 rc = hpsa_kdump_soft_reset(h);
4212                 if (rc)
4213                         /* Neither hard nor soft reset worked, we're hosed. */
4214                         goto clean4;
4215
4216                 dev_info(&h->pdev->dev, "Board READY.\n");
4217                 dev_info(&h->pdev->dev,
4218                         "Waiting for stale completions to drain.\n");
4219                 h->access.set_intr_mask(h, HPSA_INTR_ON);
4220                 msleep(10000);
4221                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4222
4223                 rc = controller_reset_failed(h->cfgtable);
4224                 if (rc)
4225                         dev_info(&h->pdev->dev,
4226                                 "Soft reset appears to have failed.\n");
4227
4228                 /* since the controller's reset, we have to go back and re-init
4229                  * everything.  Easiest to just forget what we've done and do it
4230                  * all over again.
4231                  */
4232                 hpsa_undo_allocations_after_kdump_soft_reset(h);
4233                 try_soft_reset = 0;
4234                 if (rc)
4235                         /* don't go to clean4, we already unallocated */
4236                         return -ENODEV;
4237
4238                 goto reinit_after_soft_reset;
4239         }
4240
4241         /* Turn the interrupts on so we can service requests */
4242         h->access.set_intr_mask(h, HPSA_INTR_ON);
4243
4244         hpsa_hba_inquiry(h);
4245         hpsa_register_scsi(h);  /* hook ourselves into SCSI subsystem */
4246         h->busy_initializing = 0;
4247         return 1;
4248
4249 clean4:
4250         hpsa_free_sg_chain_blocks(h);
4251         hpsa_free_cmd_pool(h);
4252         free_irq(h->intr[h->intr_mode], h);
4253 clean2:
4254 clean1:
4255         h->busy_initializing = 0;
4256         kfree(h);
4257         return rc;
4258 }
4259
4260 static void hpsa_flush_cache(struct ctlr_info *h)
4261 {
4262         char *flush_buf;
4263         struct CommandList *c;
4264
4265         flush_buf = kzalloc(4, GFP_KERNEL);
4266         if (!flush_buf)
4267                 return;
4268
4269         c = cmd_special_alloc(h);
4270         if (!c) {
4271                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
4272                 goto out_of_memory;
4273         }
4274         fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
4275                 RAID_CTLR_LUNID, TYPE_CMD);
4276         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
4277         if (c->err_info->CommandStatus != 0)
4278                 dev_warn(&h->pdev->dev,
4279                         "error flushing cache on controller\n");
4280         cmd_special_free(h, c);
4281 out_of_memory:
4282         kfree(flush_buf);
4283 }
4284
4285 static void hpsa_shutdown(struct pci_dev *pdev)
4286 {
4287         struct ctlr_info *h;
4288
4289         h = pci_get_drvdata(pdev);
4290         /* Turn board interrupts off  and send the flush cache command
4291          * sendcmd will turn off interrupt, and send the flush...
4292          * To write all data in the battery backed cache to disks
4293          */
4294         hpsa_flush_cache(h);
4295         h->access.set_intr_mask(h, HPSA_INTR_OFF);
4296         free_irq(h->intr[h->intr_mode], h);
4297 #ifdef CONFIG_PCI_MSI
4298         if (h->msix_vector)
4299                 pci_disable_msix(h->pdev);
4300         else if (h->msi_vector)
4301                 pci_disable_msi(h->pdev);
4302 #endif                          /* CONFIG_PCI_MSI */
4303 }
4304
4305 static void __devexit hpsa_remove_one(struct pci_dev *pdev)
4306 {
4307         struct ctlr_info *h;
4308
4309         if (pci_get_drvdata(pdev) == NULL) {
4310                 dev_err(&pdev->dev, "unable to remove device \n");
4311                 return;
4312         }
4313         h = pci_get_drvdata(pdev);
4314         hpsa_unregister_scsi(h);        /* unhook from SCSI subsystem */
4315         hpsa_shutdown(pdev);
4316         iounmap(h->vaddr);
4317         iounmap(h->transtable);
4318         iounmap(h->cfgtable);
4319         hpsa_free_sg_chain_blocks(h);
4320         pci_free_consistent(h->pdev,
4321                 h->nr_cmds * sizeof(struct CommandList),
4322                 h->cmd_pool, h->cmd_pool_dhandle);
4323         pci_free_consistent(h->pdev,
4324                 h->nr_cmds * sizeof(struct ErrorInfo),
4325                 h->errinfo_pool, h->errinfo_pool_dhandle);
4326         pci_free_consistent(h->pdev, h->reply_pool_size,
4327                 h->reply_pool, h->reply_pool_dhandle);
4328         kfree(h->cmd_pool_bits);
4329         kfree(h->blockFetchTable);
4330         kfree(h->hba_inquiry_data);
4331         /*
4332          * Deliberately omit pci_disable_device(): it does something nasty to
4333          * Smart Array controllers that pci_enable_device does not undo
4334          */
4335         pci_release_regions(pdev);
4336         pci_set_drvdata(pdev, NULL);
4337         kfree(h);
4338 }
4339
4340 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
4341         __attribute__((unused)) pm_message_t state)
4342 {
4343         return -ENOSYS;
4344 }
4345
4346 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
4347 {
4348         return -ENOSYS;
4349 }
4350
4351 static struct pci_driver hpsa_pci_driver = {
4352         .name = "hpsa",
4353         .probe = hpsa_init_one,
4354         .remove = __devexit_p(hpsa_remove_one),
4355         .id_table = hpsa_pci_device_id, /* id_table */
4356         .shutdown = hpsa_shutdown,
4357         .suspend = hpsa_suspend,
4358         .resume = hpsa_resume,
4359 };
4360
4361 /* Fill in bucket_map[], given nsgs (the max number of
4362  * scatter gather elements supported) and bucket[],
4363  * which is an array of 8 integers.  The bucket[] array
4364  * contains 8 different DMA transfer sizes (in 16
4365  * byte increments) which the controller uses to fetch
4366  * commands.  This function fills in bucket_map[], which
4367  * maps a given number of scatter gather elements to one of
4368  * the 8 DMA transfer sizes.  The point of it is to allow the
4369  * controller to only do as much DMA as needed to fetch the
4370  * command, with the DMA transfer size encoded in the lower
4371  * bits of the command address.
4372  */
4373 static void  calc_bucket_map(int bucket[], int num_buckets,
4374         int nsgs, int *bucket_map)
4375 {
4376         int i, j, b, size;
4377
4378         /* even a command with 0 SGs requires 4 blocks */
4379 #define MINIMUM_TRANSFER_BLOCKS 4
4380 #define NUM_BUCKETS 8
4381         /* Note, bucket_map must have nsgs+1 entries. */
4382         for (i = 0; i <= nsgs; i++) {
4383                 /* Compute size of a command with i SG entries */
4384                 size = i + MINIMUM_TRANSFER_BLOCKS;
4385                 b = num_buckets; /* Assume the biggest bucket */
4386                 /* Find the bucket that is just big enough */
4387                 for (j = 0; j < 8; j++) {
4388                         if (bucket[j] >= size) {
4389                                 b = j;
4390                                 break;
4391                         }
4392                 }
4393                 /* for a command with i SG entries, use bucket b. */
4394                 bucket_map[i] = b;
4395         }
4396 }
4397
4398 static __devinit void hpsa_enter_performant_mode(struct ctlr_info *h,
4399         u32 use_short_tags)
4400 {
4401         int i;
4402         unsigned long register_value;
4403
4404         /* This is a bit complicated.  There are 8 registers on
4405          * the controller which we write to to tell it 8 different
4406          * sizes of commands which there may be.  It's a way of
4407          * reducing the DMA done to fetch each command.  Encoded into
4408          * each command's tag are 3 bits which communicate to the controller
4409          * which of the eight sizes that command fits within.  The size of
4410          * each command depends on how many scatter gather entries there are.
4411          * Each SG entry requires 16 bytes.  The eight registers are programmed
4412          * with the number of 16-byte blocks a command of that size requires.
4413          * The smallest command possible requires 5 such 16 byte blocks.
4414          * the largest command possible requires MAXSGENTRIES + 4 16-byte
4415          * blocks.  Note, this only extends to the SG entries contained
4416          * within the command block, and does not extend to chained blocks
4417          * of SG elements.   bft[] contains the eight values we write to
4418          * the registers.  They are not evenly distributed, but have more
4419          * sizes for small commands, and fewer sizes for larger commands.
4420          */
4421         int bft[8] = {5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
4422         BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
4423         /*  5 = 1 s/g entry or 4k
4424          *  6 = 2 s/g entry or 8k
4425          *  8 = 4 s/g entry or 16k
4426          * 10 = 6 s/g entry or 24k
4427          */
4428
4429         h->reply_pool_wraparound = 1; /* spec: init to 1 */
4430
4431         /* Controller spec: zero out this buffer. */
4432         memset(h->reply_pool, 0, h->reply_pool_size);
4433         h->reply_pool_head = h->reply_pool;
4434
4435         bft[7] = h->max_sg_entries + 4;
4436         calc_bucket_map(bft, ARRAY_SIZE(bft), 32, h->blockFetchTable);
4437         for (i = 0; i < 8; i++)
4438                 writel(bft[i], &h->transtable->BlockFetch[i]);
4439
4440         /* size of controller ring buffer */
4441         writel(h->max_commands, &h->transtable->RepQSize);
4442         writel(1, &h->transtable->RepQCount);
4443         writel(0, &h->transtable->RepQCtrAddrLow32);
4444         writel(0, &h->transtable->RepQCtrAddrHigh32);
4445         writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
4446         writel(0, &h->transtable->RepQAddr0High32);
4447         writel(CFGTBL_Trans_Performant | use_short_tags,
4448                 &(h->cfgtable->HostWrite.TransportRequest));
4449         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
4450         hpsa_wait_for_mode_change_ack(h);
4451         register_value = readl(&(h->cfgtable->TransportActive));
4452         if (!(register_value & CFGTBL_Trans_Performant)) {
4453                 dev_warn(&h->pdev->dev, "unable to get board into"
4454                                         " performant mode\n");
4455                 return;
4456         }
4457         /* Change the access methods to the performant access methods */
4458         h->access = SA5_performant_access;
4459         h->transMethod = CFGTBL_Trans_Performant;
4460 }
4461
4462 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
4463 {
4464         u32 trans_support;
4465
4466         if (hpsa_simple_mode)
4467                 return;
4468
4469         trans_support = readl(&(h->cfgtable->TransportSupport));
4470         if (!(trans_support & PERFORMANT_MODE))
4471                 return;
4472
4473         hpsa_get_max_perf_mode_cmds(h);
4474         h->max_sg_entries = 32;
4475         /* Performant mode ring buffer and supporting data structures */
4476         h->reply_pool_size = h->max_commands * sizeof(u64);
4477         h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size,
4478                                 &(h->reply_pool_dhandle));
4479
4480         /* Need a block fetch table for performant mode */
4481         h->blockFetchTable = kmalloc(((h->max_sg_entries+1) *
4482                                 sizeof(u32)), GFP_KERNEL);
4483
4484         if ((h->reply_pool == NULL)
4485                 || (h->blockFetchTable == NULL))
4486                 goto clean_up;
4487
4488         hpsa_enter_performant_mode(h,
4489                 trans_support & CFGTBL_Trans_use_short_tags);
4490
4491         return;
4492
4493 clean_up:
4494         if (h->reply_pool)
4495                 pci_free_consistent(h->pdev, h->reply_pool_size,
4496                         h->reply_pool, h->reply_pool_dhandle);
4497         kfree(h->blockFetchTable);
4498 }
4499
4500 /*
4501  *  This is it.  Register the PCI driver information for the cards we control
4502  *  the OS will call our registered routines when it finds one of our cards.
4503  */
4504 static int __init hpsa_init(void)
4505 {
4506         return pci_register_driver(&hpsa_pci_driver);
4507 }
4508
4509 static void __exit hpsa_cleanup(void)
4510 {
4511         pci_unregister_driver(&hpsa_pci_driver);
4512 }
4513
4514 module_init(hpsa_init);
4515 module_exit(hpsa_cleanup);