drivers/scsi/hpsa.c

   1 /*
   2  *    Disk Array driver for HP Smart Array SAS controllers
   3  *    Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
   4  *
   5  *    This program is free software; you can redistribute it and/or modify
   6  *    it under the terms of the GNU General Public License as published by
   7  *    the Free Software Foundation; version 2 of the License.
   8  *
   9  *    This program is distributed in the hope that it will be useful,
  10  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  12  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  13  *
  14  *    You should have received a copy of the GNU General Public License
  15  *    along with this program; if not, write to the Free Software
  16  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  *
  18  *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/types.h>
  25 #include <linux/pci.h>
  26 #include <linux/kernel.h>
  27 #include <linux/slab.h>
  28 #include <linux/delay.h>
  29 #include <linux/fs.h>
  30 #include <linux/timer.h>
  31 #include <linux/seq_file.h>
  32 #include <linux/init.h>
  33 #include <linux/spinlock.h>
  34 #include <linux/compat.h>
  35 #include <linux/blktrace_api.h>
  36 #include <linux/uaccess.h>
  37 #include <linux/io.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/completion.h>
  40 #include <linux/moduleparam.h>
  41 #include <scsi/scsi.h>
  42 #include <scsi/scsi_cmnd.h>
  43 #include <scsi/scsi_device.h>
  44 #include <scsi/scsi_host.h>
  45 #include <scsi/scsi_tcq.h>
  46 #include <linux/cciss_ioctl.h>
  47 #include <linux/string.h>
  48 #include <linux/bitmap.h>
  49 #include <asm/atomic.h>
  50 #include <linux/kthread.h>
  51 #include "hpsa_cmd.h"
  52 #include "hpsa.h"
  53
  54 /* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
  55 #define HPSA_DRIVER_VERSION "2.0.2-1"
  56 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
  57
  58 /* How long to wait (in milliseconds) for board to go into simple mode */
  59 #define MAX_CONFIG_WAIT 30000
  60 #define MAX_IOCTL_CONFIG_WAIT 1000
  61
  62 /*define how many times we will try a command because of bus resets */
  63 #define MAX_CMD_RETRIES 3
  64
  65 /* Embedded module documentation macros - see modules.h */
  66 MODULE_AUTHOR("Hewlett-Packard Company");
  67 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
  68         HPSA_DRIVER_VERSION);
  69 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
  70 MODULE_VERSION(HPSA_DRIVER_VERSION);
  71 MODULE_LICENSE("GPL");
  72
  73 static int hpsa_allow_any;
  74 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
  75 MODULE_PARM_DESC(hpsa_allow_any,
  76                 "Allow hpsa driver to access unknown HP Smart Array hardware");
  77
  78 /* define the PCI info for the cards we can control */
  79 static const struct pci_device_id hpsa_pci_device_id[] = {
  80         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
  81         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
  82         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
  83         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
  84         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
  85         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324a},
  86         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324b},
  87         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
  88         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3250},
  89         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3251},
  90         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3252},
  91         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3253},
  92         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3254},
  93         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
  94                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
  95         {0,}
  96 };
  97
  98 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
  99
 100 /*  board_id = Subsystem Device ID & Vendor ID
 101  *  product = Marketing Name for the board
 102  *  access = Address of the struct of function pointers
 103  */
 104 static struct board_type products[] = {
 105         {0x3241103C, "Smart Array P212", &SA5_access},
 106         {0x3243103C, "Smart Array P410", &SA5_access},
 107         {0x3245103C, "Smart Array P410i", &SA5_access},
 108         {0x3247103C, "Smart Array P411", &SA5_access},
 109         {0x3249103C, "Smart Array P812", &SA5_access},
 110         {0x324a103C, "Smart Array P712m", &SA5_access},
 111         {0x324b103C, "Smart Array P711m", &SA5_access},
 112         {0x3250103C, "Smart Array", &SA5_access},
 113         {0x3250113C, "Smart Array", &SA5_access},
 114         {0x3250123C, "Smart Array", &SA5_access},
 115         {0x3250133C, "Smart Array", &SA5_access},
 116         {0x3250143C, "Smart Array", &SA5_access},
 117         {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 118 };
 119
 120 static int number_of_controllers;
 121
 122 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
 123 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
 124 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
 125 static void start_io(struct ctlr_info *h);
 126
 127 #ifdef CONFIG_COMPAT
 128 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
 129 #endif
 130
 131 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 132 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
 133 static struct CommandList *cmd_alloc(struct ctlr_info *h);
 134 static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
 135 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 136         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
 137         int cmd_type);
 138
 139 static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 140 static void hpsa_scan_start(struct Scsi_Host *);
 141 static int hpsa_scan_finished(struct Scsi_Host *sh,
 142         unsigned long elapsed_time);
 143 static int hpsa_change_queue_depth(struct scsi_device *sdev,
 144         int qdepth, int reason);
 145
 146 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 147 static int hpsa_slave_alloc(struct scsi_device *sdev);
 148 static void hpsa_slave_destroy(struct scsi_device *sdev);
 149
 150 static ssize_t raid_level_show(struct device *dev,
 151         struct device_attribute *attr, char *buf);
 152 static ssize_t lunid_show(struct device *dev,
 153         struct device_attribute *attr, char *buf);
 154 static ssize_t unique_id_show(struct device *dev,
 155         struct device_attribute *attr, char *buf);
 156 static ssize_t host_show_firmware_revision(struct device *dev,
 157              struct device_attribute *attr, char *buf);
 158 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
 159 static ssize_t host_store_rescan(struct device *dev,
 160          struct device_attribute *attr, const char *buf, size_t count);
 161 static int check_for_unit_attention(struct ctlr_info *h,
 162         struct CommandList *c);
 163 static void check_ioctl_unit_attention(struct ctlr_info *h,
 164         struct CommandList *c);
 165 /* performant mode helper functions */
 166 static void calc_bucket_map(int *bucket, int num_buckets,
 167         int nsgs, int *bucket_map);
 168 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 169 static inline u32 next_command(struct ctlr_info *h);
 170 static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev,
 171         void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
 172         u64 *cfg_offset);
 173 static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
 174         unsigned long *memory_bar);
 175 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
 176
 177 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
 178 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
 179 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
 180 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 181 static DEVICE_ATTR(firmware_revision, S_IRUGO,
 182         host_show_firmware_revision, NULL);
 183
 184 static struct device_attribute *hpsa_sdev_attrs[] = {
 185         &dev_attr_raid_level,
 186         &dev_attr_lunid,
 187         &dev_attr_unique_id,
 188         NULL,
 189 };
 190
 191 static struct device_attribute *hpsa_shost_attrs[] = {
 192         &dev_attr_rescan,
 193         &dev_attr_firmware_revision,
 194         NULL,
 195 };
 196
 197 static struct scsi_host_template hpsa_driver_template = {
 198         .module                 = THIS_MODULE,
 199         .name                   = "hpsa",
 200         .proc_name              = "hpsa",
 201         .queuecommand           = hpsa_scsi_queue_command,
 202         .scan_start             = hpsa_scan_start,
 203         .scan_finished          = hpsa_scan_finished,
 204         .change_queue_depth     = hpsa_change_queue_depth,
 205         .this_id                = -1,
 206         .use_clustering         = ENABLE_CLUSTERING,
 207         .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 208         .ioctl                  = hpsa_ioctl,
 209         .slave_alloc            = hpsa_slave_alloc,
 210         .slave_destroy          = hpsa_slave_destroy,
 211 #ifdef CONFIG_COMPAT
 212         .compat_ioctl           = hpsa_compat_ioctl,
 213 #endif
 214         .sdev_attrs = hpsa_sdev_attrs,
 215         .shost_attrs = hpsa_shost_attrs,
 216 };
 217
 218 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 219 {
 220         unsigned long *priv = shost_priv(sdev->host);
 221         return (struct ctlr_info *) *priv;
 222 }
 223
 224 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 225 {
 226         unsigned long *priv = shost_priv(sh);
 227         return (struct ctlr_info *) *priv;
 228 }
 229
 230 static int check_for_unit_attention(struct ctlr_info *h,
 231         struct CommandList *c)
 232 {
 233         if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
 234                 return 0;
 235
 236         switch (c->err_info->SenseInfo[12]) {
 237         case STATE_CHANGED:
 238                 dev_warn(&h->pdev->dev, "hpsa%d: a state change "
 239                         "detected, command retried\n", h->ctlr);
 240                 break;
 241         case LUN_FAILED:
 242                 dev_warn(&h->pdev->dev, "hpsa%d: LUN failure "
 243                         "detected, action required\n", h->ctlr);
 244                 break;
 245         case REPORT_LUNS_CHANGED:
 246                 dev_warn(&h->pdev->dev, "hpsa%d: report LUN data "
 247                         "changed, action required\n", h->ctlr);
 248         /*
 249          * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
 250          */
 251                 break;
 252         case POWER_OR_RESET:
 253                 dev_warn(&h->pdev->dev, "hpsa%d: a power on "
 254                         "or device reset detected\n", h->ctlr);
 255                 break;
 256         case UNIT_ATTENTION_CLEARED:
 257                 dev_warn(&h->pdev->dev, "hpsa%d: unit attention "
 258                     "cleared by another initiator\n", h->ctlr);
 259                 break;
 260         default:
 261                 dev_warn(&h->pdev->dev, "hpsa%d: unknown "
 262                         "unit attention detected\n", h->ctlr);
 263                 break;
 264         }
 265         return 1;
 266 }
 267
 268 static ssize_t host_store_rescan(struct device *dev,
 269                                  struct device_attribute *attr,
 270                                  const char *buf, size_t count)
 271 {
 272         struct ctlr_info *h;
 273         struct Scsi_Host *shost = class_to_shost(dev);
 274         h = shost_to_hba(shost);
 275         hpsa_scan_start(h->scsi_host);
 276         return count;
 277 }
 278
 279 static ssize_t host_show_firmware_revision(struct device *dev,
 280              struct device_attribute *attr, char *buf)
 281 {
 282         struct ctlr_info *h;
 283         struct Scsi_Host *shost = class_to_shost(dev);
 284         unsigned char *fwrev;
 285
 286         h = shost_to_hba(shost);
 287         if (!h->hba_inquiry_data)
 288                 return 0;
 289         fwrev = &h->hba_inquiry_data[32];
 290         return snprintf(buf, 20, "%c%c%c%c\n",
 291                 fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
 292 }
 293
 294 /* Enqueuing and dequeuing functions for cmdlists. */
 295 static inline void addQ(struct hlist_head *list, struct CommandList *c)
 296 {
 297         hlist_add_head(&c->list, list);
 298 }
 299
 300 static inline u32 next_command(struct ctlr_info *h)
 301 {
 302         u32 a;
 303
 304         if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
 305                 return h->access.command_completed(h);
 306
 307         if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
 308                 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
 309                 (h->reply_pool_head)++;
 310                 h->commands_outstanding--;
 311         } else {
 312                 a = FIFO_EMPTY;
 313         }
 314         /* Check for wraparound */
 315         if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
 316                 h->reply_pool_head = h->reply_pool;
 317                 h->reply_pool_wraparound ^= 1;
 318         }
 319         return a;
 320 }
 321
 322 /* set_performant_mode: Modify the tag for cciss performant
 323  * set bit 0 for pull model, bits 3-1 for block fetch
 324  * register number
 325  */
 326 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
 327 {
 328         if (likely(h->transMethod == CFGTBL_Trans_Performant))
 329                 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
 330 }
 331
 332 static void enqueue_cmd_and_start_io(struct ctlr_info *h,
 333         struct CommandList *c)
 334 {
 335         unsigned long flags;
 336
 337         set_performant_mode(h, c);
 338         spin_lock_irqsave(&h->lock, flags);
 339         addQ(&h->reqQ, c);
 340         h->Qdepth++;
 341         start_io(h);
 342         spin_unlock_irqrestore(&h->lock, flags);
 343 }
 344
 345 static inline void removeQ(struct CommandList *c)
 346 {
 347         if (WARN_ON(hlist_unhashed(&c->list)))
 348                 return;
 349         hlist_del_init(&c->list);
 350 }
 351
 352 static inline int is_hba_lunid(unsigned char scsi3addr[])
 353 {
 354         return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
 355 }
 356
 357 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 358 {
 359         return (scsi3addr[3] & 0xC0) == 0x40;
 360 }
 361
 362 static inline int is_scsi_rev_5(struct ctlr_info *h)
 363 {
 364         if (!h->hba_inquiry_data)
 365                 return 0;
 366         if ((h->hba_inquiry_data[2] & 0x07) == 5)
 367                 return 1;
 368         return 0;
 369 }
 370
 371 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 372         "UNKNOWN"
 373 };
 374 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
 375
 376 static ssize_t raid_level_show(struct device *dev,
 377              struct device_attribute *attr, char *buf)
 378 {
 379         ssize_t l = 0;
 380         unsigned char rlevel;
 381         struct ctlr_info *h;
 382         struct scsi_device *sdev;
 383         struct hpsa_scsi_dev_t *hdev;
 384         unsigned long flags;
 385
 386         sdev = to_scsi_device(dev);
 387         h = sdev_to_hba(sdev);
 388         spin_lock_irqsave(&h->lock, flags);
 389         hdev = sdev->hostdata;
 390         if (!hdev) {
 391                 spin_unlock_irqrestore(&h->lock, flags);
 392                 return -ENODEV;
 393         }
 394
 395         /* Is this even a logical drive? */
 396         if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
 397                 spin_unlock_irqrestore(&h->lock, flags);
 398                 l = snprintf(buf, PAGE_SIZE, "N/A\n");
 399                 return l;
 400         }
 401
 402         rlevel = hdev->raid_level;
 403         spin_unlock_irqrestore(&h->lock, flags);
 404         if (rlevel > RAID_UNKNOWN)
 405                 rlevel = RAID_UNKNOWN;
 406         l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 407         return l;
 408 }
 409
 410 static ssize_t lunid_show(struct device *dev,
 411              struct device_attribute *attr, char *buf)
 412 {
 413         struct ctlr_info *h;
 414         struct scsi_device *sdev;
 415         struct hpsa_scsi_dev_t *hdev;
 416         unsigned long flags;
 417         unsigned char lunid[8];
 418
 419         sdev = to_scsi_device(dev);
 420         h = sdev_to_hba(sdev);
 421         spin_lock_irqsave(&h->lock, flags);
 422         hdev = sdev->hostdata;
 423         if (!hdev) {
 424                 spin_unlock_irqrestore(&h->lock, flags);
 425                 return -ENODEV;
 426         }
 427         memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 428         spin_unlock_irqrestore(&h->lock, flags);
 429         return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 430                 lunid[0], lunid[1], lunid[2], lunid[3],
 431                 lunid[4], lunid[5], lunid[6], lunid[7]);
 432 }
 433
 434 static ssize_t unique_id_show(struct device *dev,
 435              struct device_attribute *attr, char *buf)
 436 {
 437         struct ctlr_info *h;
 438         struct scsi_device *sdev;
 439         struct hpsa_scsi_dev_t *hdev;
 440         unsigned long flags;
 441         unsigned char sn[16];
 442
 443         sdev = to_scsi_device(dev);
 444         h = sdev_to_hba(sdev);
 445         spin_lock_irqsave(&h->lock, flags);
 446         hdev = sdev->hostdata;
 447         if (!hdev) {
 448                 spin_unlock_irqrestore(&h->lock, flags);
 449                 return -ENODEV;
 450         }
 451         memcpy(sn, hdev->device_id, sizeof(sn));
 452         spin_unlock_irqrestore(&h->lock, flags);
 453         return snprintf(buf, 16 * 2 + 2,
 454                         "%02X%02X%02X%02X%02X%02X%02X%02X"
 455                         "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 456                         sn[0], sn[1], sn[2], sn[3],
 457                         sn[4], sn[5], sn[6], sn[7],
 458                         sn[8], sn[9], sn[10], sn[11],
 459                         sn[12], sn[13], sn[14], sn[15]);
 460 }
 461
 462 static int hpsa_find_target_lun(struct ctlr_info *h,
 463         unsigned char scsi3addr[], int bus, int *target, int *lun)
 464 {
 465         /* finds an unused bus, target, lun for a new physical device
 466          * assumes h->devlock is held
 467          */
 468         int i, found = 0;
 469         DECLARE_BITMAP(lun_taken, HPSA_MAX_SCSI_DEVS_PER_HBA);
 470
 471         memset(&lun_taken[0], 0, HPSA_MAX_SCSI_DEVS_PER_HBA >> 3);
 472
 473         for (i = 0; i < h->ndevices; i++) {
 474                 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
 475                         set_bit(h->dev[i]->target, lun_taken);
 476         }
 477
 478         for (i = 0; i < HPSA_MAX_SCSI_DEVS_PER_HBA; i++) {
 479                 if (!test_bit(i, lun_taken)) {
 480                         /* *bus = 1; */
 481                         *target = i;
 482                         *lun = 0;
 483                         found = 1;
 484                         break;
 485                 }
 486         }
 487         return !found;
 488 }
 489
 490 /* Add an entry into h->dev[] array. */
 491 static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
 492                 struct hpsa_scsi_dev_t *device,
 493                 struct hpsa_scsi_dev_t *added[], int *nadded)
 494 {
 495         /* assumes h->devlock is held */
 496         int n = h->ndevices;
 497         int i;
 498         unsigned char addr1[8], addr2[8];
 499         struct hpsa_scsi_dev_t *sd;
 500
 501         if (n >= HPSA_MAX_SCSI_DEVS_PER_HBA) {
 502                 dev_err(&h->pdev->dev, "too many devices, some will be "
 503                         "inaccessible.\n");
 504                 return -1;
 505         }
 506
 507         /* physical devices do not have lun or target assigned until now. */
 508         if (device->lun != -1)
 509                 /* Logical device, lun is already assigned. */
 510                 goto lun_assigned;
 511
 512         /* If this device a non-zero lun of a multi-lun device
 513          * byte 4 of the 8-byte LUN addr will contain the logical
 514          * unit no, zero otherise.
 515          */
 516         if (device->scsi3addr[4] == 0) {
 517                 /* This is not a non-zero lun of a multi-lun device */
 518                 if (hpsa_find_target_lun(h, device->scsi3addr,
 519                         device->bus, &device->target, &device->lun) != 0)
 520                         return -1;
 521                 goto lun_assigned;
 522         }
 523
 524         /* This is a non-zero lun of a multi-lun device.
 525          * Search through our list and find the device which
 526          * has the same 8 byte LUN address, excepting byte 4.
 527          * Assign the same bus and target for this new LUN.
 528          * Use the logical unit number from the firmware.
 529          */
 530         memcpy(addr1, device->scsi3addr, 8);
 531         addr1[4] = 0;
 532         for (i = 0; i < n; i++) {
 533                 sd = h->dev[i];
 534                 memcpy(addr2, sd->scsi3addr, 8);
 535                 addr2[4] = 0;
 536                 /* differ only in byte 4? */
 537                 if (memcmp(addr1, addr2, 8) == 0) {
 538                         device->bus = sd->bus;
 539                         device->target = sd->target;
 540                         device->lun = device->scsi3addr[4];
 541                         break;
 542                 }
 543         }
 544         if (device->lun == -1) {
 545                 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
 546                         " suspect firmware bug or unsupported hardware "
 547                         "configuration.\n");
 548                         return -1;
 549         }
 550
 551 lun_assigned:
 552
 553         h->dev[n] = device;
 554         h->ndevices++;
 555         added[*nadded] = device;
 556         (*nadded)++;
 557
 558         /* initially, (before registering with scsi layer) we don't
 559          * know our hostno and we don't want to print anything first
 560          * time anyway (the scsi layer's inquiries will show that info)
 561          */
 562         /* if (hostno != -1) */
 563                 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
 564                         scsi_device_type(device->devtype), hostno,
 565                         device->bus, device->target, device->lun);
 566         return 0;
 567 }
 568
 569 /* Replace an entry from h->dev[] array. */
 570 static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
 571         int entry, struct hpsa_scsi_dev_t *new_entry,
 572         struct hpsa_scsi_dev_t *added[], int *nadded,
 573         struct hpsa_scsi_dev_t *removed[], int *nremoved)
 574 {
 575         /* assumes h->devlock is held */
 576         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
 577         removed[*nremoved] = h->dev[entry];
 578         (*nremoved)++;
 579         h->dev[entry] = new_entry;
 580         added[*nadded] = new_entry;
 581         (*nadded)++;
 582         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
 583                 scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
 584                         new_entry->target, new_entry->lun);
 585 }
 586
 587 /* Remove an entry from h->dev[] array. */
 588 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
 589         struct hpsa_scsi_dev_t *removed[], int *nremoved)
 590 {
 591         /* assumes h->devlock is held */
 592         int i;
 593         struct hpsa_scsi_dev_t *sd;
 594
 595         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
 596
 597         sd = h->dev[entry];
 598         removed[*nremoved] = h->dev[entry];
 599         (*nremoved)++;
 600
 601         for (i = entry; i < h->ndevices-1; i++)
 602                 h->dev[i] = h->dev[i+1];
 603         h->ndevices--;
 604         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
 605                 scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
 606                 sd->lun);
 607 }
 608
 609 #define SCSI3ADDR_EQ(a, b) ( \
 610         (a)[7] == (b)[7] && \
 611         (a)[6] == (b)[6] && \
 612         (a)[5] == (b)[5] && \
 613         (a)[4] == (b)[4] && \
 614         (a)[3] == (b)[3] && \
 615         (a)[2] == (b)[2] && \
 616         (a)[1] == (b)[1] && \
 617         (a)[0] == (b)[0])
 618
 619 static void fixup_botched_add(struct ctlr_info *h,
 620         struct hpsa_scsi_dev_t *added)
 621 {
 622         /* called when scsi_add_device fails in order to re-adjust
 623          * h->dev[] to match the mid layer's view.
 624          */
 625         unsigned long flags;
 626         int i, j;
 627
 628         spin_lock_irqsave(&h->lock, flags);
 629         for (i = 0; i < h->ndevices; i++) {
 630                 if (h->dev[i] == added) {
 631                         for (j = i; j < h->ndevices-1; j++)
 632                                 h->dev[j] = h->dev[j+1];
 633                         h->ndevices--;
 634                         break;
 635                 }
 636         }
 637         spin_unlock_irqrestore(&h->lock, flags);
 638         kfree(added);
 639 }
 640
 641 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
 642         struct hpsa_scsi_dev_t *dev2)
 643 {
 644         /* we compare everything except lun and target as these
 645          * are not yet assigned.  Compare parts likely
 646          * to differ first
 647          */
 648         if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
 649                 sizeof(dev1->scsi3addr)) != 0)
 650                 return 0;
 651         if (memcmp(dev1->device_id, dev2->device_id,
 652                 sizeof(dev1->device_id)) != 0)
 653                 return 0;
 654         if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
 655                 return 0;
 656         if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
 657                 return 0;
 658         if (dev1->devtype != dev2->devtype)
 659                 return 0;
 660         if (dev1->bus != dev2->bus)
 661                 return 0;
 662         return 1;
 663 }
 664
 665 /* Find needle in haystack.  If exact match found, return DEVICE_SAME,
 666  * and return needle location in *index.  If scsi3addr matches, but not
 667  * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
 668  * location in *index.  If needle not found, return DEVICE_NOT_FOUND.
 669  */
 670 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
 671         struct hpsa_scsi_dev_t *haystack[], int haystack_size,
 672         int *index)
 673 {
 674         int i;
 675 #define DEVICE_NOT_FOUND 0
 676 #define DEVICE_CHANGED 1
 677 #define DEVICE_SAME 2
 678         for (i = 0; i < haystack_size; i++) {
 679                 if (haystack[i] == NULL) /* previously removed. */
 680                         continue;
 681                 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
 682                         *index = i;
 683                         if (device_is_the_same(needle, haystack[i]))
 684                                 return DEVICE_SAME;
 685                         else
 686                                 return DEVICE_CHANGED;
 687                 }
 688         }
 689         *index = -1;
 690         return DEVICE_NOT_FOUND;
 691 }
 692
 693 static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
 694         struct hpsa_scsi_dev_t *sd[], int nsds)
 695 {
 696         /* sd contains scsi3 addresses and devtypes, and inquiry
 697          * data.  This function takes what's in sd to be the current
 698          * reality and updates h->dev[] to reflect that reality.
 699          */
 700         int i, entry, device_change, changes = 0;
 701         struct hpsa_scsi_dev_t *csd;
 702         unsigned long flags;
 703         struct hpsa_scsi_dev_t **added, **removed;
 704         int nadded, nremoved;
 705         struct Scsi_Host *sh = NULL;
 706
 707         added = kzalloc(sizeof(*added) * HPSA_MAX_SCSI_DEVS_PER_HBA,
 708                 GFP_KERNEL);
 709         removed = kzalloc(sizeof(*removed) * HPSA_MAX_SCSI_DEVS_PER_HBA,
 710                 GFP_KERNEL);
 711
 712         if (!added || !removed) {
 713                 dev_warn(&h->pdev->dev, "out of memory in "
 714                         "adjust_hpsa_scsi_table\n");
 715                 goto free_and_out;
 716         }
 717
 718         spin_lock_irqsave(&h->devlock, flags);
 719
 720         /* find any devices in h->dev[] that are not in
 721          * sd[] and remove them from h->dev[], and for any
 722          * devices which have changed, remove the old device
 723          * info and add the new device info.
 724          */
 725         i = 0;
 726         nremoved = 0;
 727         nadded = 0;
 728         while (i < h->ndevices) {
 729                 csd = h->dev[i];
 730                 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
 731                 if (device_change == DEVICE_NOT_FOUND) {
 732                         changes++;
 733                         hpsa_scsi_remove_entry(h, hostno, i,
 734                                 removed, &nremoved);
 735                         continue; /* remove ^^^, hence i not incremented */
 736                 } else if (device_change == DEVICE_CHANGED) {
 737                         changes++;
 738                         hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
 739                                 added, &nadded, removed, &nremoved);
 740                         /* Set it to NULL to prevent it from being freed
 741                          * at the bottom of hpsa_update_scsi_devices()
 742                          */
 743                         sd[entry] = NULL;
 744                 }
 745                 i++;
 746         }
 747
 748         /* Now, make sure every device listed in sd[] is also
 749          * listed in h->dev[], adding them if they aren't found
 750          */
 751
 752         for (i = 0; i < nsds; i++) {
 753                 if (!sd[i]) /* if already added above. */
 754                         continue;
 755                 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
 756                                         h->ndevices, &entry);
 757                 if (device_change == DEVICE_NOT_FOUND) {
 758                         changes++;
 759                         if (hpsa_scsi_add_entry(h, hostno, sd[i],
 760                                 added, &nadded) != 0)
 761                                 break;
 762                         sd[i] = NULL; /* prevent from being freed later. */
 763                 } else if (device_change == DEVICE_CHANGED) {
 764                         /* should never happen... */
 765                         changes++;
 766                         dev_warn(&h->pdev->dev,
 767                                 "device unexpectedly changed.\n");
 768                         /* but if it does happen, we just ignore that device */
 769                 }
 770         }
 771         spin_unlock_irqrestore(&h->devlock, flags);
 772
 773         /* Don't notify scsi mid layer of any changes the first time through
 774          * (or if there are no changes) scsi_scan_host will do it later the
 775          * first time through.
 776          */
 777         if (hostno == -1 || !changes)
 778                 goto free_and_out;
 779
 780         sh = h->scsi_host;
 781         /* Notify scsi mid layer of any removed devices */
 782         for (i = 0; i < nremoved; i++) {
 783                 struct scsi_device *sdev =
 784                         scsi_device_lookup(sh, removed[i]->bus,
 785                                 removed[i]->target, removed[i]->lun);
 786                 if (sdev != NULL) {
 787                         scsi_remove_device(sdev);
 788                         scsi_device_put(sdev);
 789                 } else {
 790                         /* We don't expect to get here.
 791                          * future cmds to this device will get selection
 792                          * timeout as if the device was gone.
 793                          */
 794                         dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
 795                                 " for removal.", hostno, removed[i]->bus,
 796                                 removed[i]->target, removed[i]->lun);
 797                 }
 798                 kfree(removed[i]);
 799                 removed[i] = NULL;
 800         }
 801
 802         /* Notify scsi mid layer of any added devices */
 803         for (i = 0; i < nadded; i++) {
 804                 if (scsi_add_device(sh, added[i]->bus,
 805                         added[i]->target, added[i]->lun) == 0)
 806                         continue;
 807                 dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
 808                         "device not added.\n", hostno, added[i]->bus,
 809                         added[i]->target, added[i]->lun);
 810                 /* now we have to remove it from h->dev,
 811                  * since it didn't get added to scsi mid layer
 812                  */
 813                 fixup_botched_add(h, added[i]);
 814         }
 815
 816 free_and_out:
 817         kfree(added);
 818         kfree(removed);
 819 }
 820
 821 /*
 822  * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
 823  * Assume's h->devlock is held.
 824  */
 825 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
 826         int bus, int target, int lun)
 827 {
 828         int i;
 829         struct hpsa_scsi_dev_t *sd;
 830
 831         for (i = 0; i < h->ndevices; i++) {
 832                 sd = h->dev[i];
 833                 if (sd->bus == bus && sd->target == target && sd->lun == lun)
 834                         return sd;
 835         }
 836         return NULL;
 837 }
 838
 839 /* link sdev->hostdata to our per-device structure. */
 840 static int hpsa_slave_alloc(struct scsi_device *sdev)
 841 {
 842         struct hpsa_scsi_dev_t *sd;
 843         unsigned long flags;
 844         struct ctlr_info *h;
 845
 846         h = sdev_to_hba(sdev);
 847         spin_lock_irqsave(&h->devlock, flags);
 848         sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
 849                 sdev_id(sdev), sdev->lun);
 850         if (sd != NULL)
 851                 sdev->hostdata = sd;
 852         spin_unlock_irqrestore(&h->devlock, flags);
 853         return 0;
 854 }
 855
 856 static void hpsa_slave_destroy(struct scsi_device *sdev)
 857 {
 858         /* nothing to do. */
 859 }
 860
 861 static void hpsa_scsi_setup(struct ctlr_info *h)
 862 {
 863         h->ndevices = 0;
 864         h->scsi_host = NULL;
 865         spin_lock_init(&h->devlock);
 866 }
 867
 868 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
 869 {
 870         int i;
 871
 872         if (!h->cmd_sg_list)
 873                 return;
 874         for (i = 0; i < h->nr_cmds; i++) {
 875                 kfree(h->cmd_sg_list[i]);
 876                 h->cmd_sg_list[i] = NULL;
 877         }
 878         kfree(h->cmd_sg_list);
 879         h->cmd_sg_list = NULL;
 880 }
 881
 882 static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
 883 {
 884         int i;
 885
 886         if (h->chainsize <= 0)
 887                 return 0;
 888
 889         h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
 890                                 GFP_KERNEL);
 891         if (!h->cmd_sg_list)
 892                 return -ENOMEM;
 893         for (i = 0; i < h->nr_cmds; i++) {
 894                 h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
 895                                                 h->chainsize, GFP_KERNEL);
 896                 if (!h->cmd_sg_list[i])
 897                         goto clean;
 898         }
 899         return 0;
 900
 901 clean:
 902         hpsa_free_sg_chain_blocks(h);
 903         return -ENOMEM;
 904 }
 905
 906 static void hpsa_map_sg_chain_block(struct ctlr_info *h,
 907         struct CommandList *c)
 908 {
 909         struct SGDescriptor *chain_sg, *chain_block;
 910         u64 temp64;
 911
 912         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
 913         chain_block = h->cmd_sg_list[c->cmdindex];
 914         chain_sg->Ext = HPSA_SG_CHAIN;
 915         chain_sg->Len = sizeof(*chain_sg) *
 916                 (c->Header.SGTotal - h->max_cmd_sg_entries);
 917         temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
 918                                 PCI_DMA_TODEVICE);
 919         chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
 920         chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
 921 }
 922
 923 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
 924         struct CommandList *c)
 925 {
 926         struct SGDescriptor *chain_sg;
 927         union u64bit temp64;
 928
 929         if (c->Header.SGTotal <= h->max_cmd_sg_entries)
 930                 return;
 931
 932         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
 933         temp64.val32.lower = chain_sg->Addr.lower;
 934         temp64.val32.upper = chain_sg->Addr.upper;
 935         pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
 936 }
 937
 938 static void complete_scsi_command(struct CommandList *cp,
 939         int timeout, u32 tag)
 940 {
 941         struct scsi_cmnd *cmd;
 942         struct ctlr_info *h;
 943         struct ErrorInfo *ei;
 944
 945         unsigned char sense_key;
 946         unsigned char asc;      /* additional sense code */
 947         unsigned char ascq;     /* additional sense code qualifier */
 948
 949         ei = cp->err_info;
 950         cmd = (struct scsi_cmnd *) cp->scsi_cmd;
 951         h = cp->h;
 952
 953         scsi_dma_unmap(cmd); /* undo the DMA mappings */
 954         if (cp->Header.SGTotal > h->max_cmd_sg_entries)
 955                 hpsa_unmap_sg_chain_block(h, cp);
 956
 957         cmd->result = (DID_OK << 16);           /* host byte */
 958         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
 959         cmd->result |= ei->ScsiStatus;
 960
 961         /* copy the sense data whether we need to or not. */
 962         memcpy(cmd->sense_buffer, ei->SenseInfo,
 963                 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
 964                         SCSI_SENSE_BUFFERSIZE :
 965                         ei->SenseLen);
 966         scsi_set_resid(cmd, ei->ResidualCnt);
 967
 968         if (ei->CommandStatus == 0) {
 969                 cmd->scsi_done(cmd);
 970                 cmd_free(h, cp);
 971                 return;
 972         }
 973
 974         /* an error has occurred */
 975         switch (ei->CommandStatus) {
 976
 977         case CMD_TARGET_STATUS:
 978                 if (ei->ScsiStatus) {
 979                         /* Get sense key */
 980                         sense_key = 0xf & ei->SenseInfo[2];
 981                         /* Get additional sense code */
 982                         asc = ei->SenseInfo[12];
 983                         /* Get addition sense code qualifier */
 984                         ascq = ei->SenseInfo[13];
 985                 }
 986
 987                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
 988                         if (check_for_unit_attention(h, cp)) {
 989                                 cmd->result = DID_SOFT_ERROR << 16;
 990                                 break;
 991                         }
 992                         if (sense_key == ILLEGAL_REQUEST) {
 993                                 /*
 994                                  * SCSI REPORT_LUNS is commonly unsupported on
 995                                  * Smart Array.  Suppress noisy complaint.
 996                                  */
 997                                 if (cp->Request.CDB[0] == REPORT_LUNS)
 998                                         break;
 999
1000                                 /* If ASC/ASCQ indicate Logical Unit
1001                                  * Not Supported condition,
1002                                  */
1003                                 if ((asc == 0x25) && (ascq == 0x0)) {
1004                                         dev_warn(&h->pdev->dev, "cp %p "
1005                                                 "has check condition\n", cp);
1006                                         break;
1007                                 }
1008                         }
1009
1010                         if (sense_key == NOT_READY) {
1011                                 /* If Sense is Not Ready, Logical Unit
1012                                  * Not ready, Manual Intervention
1013                                  * required
1014                                  */
1015                                 if ((asc == 0x04) && (ascq == 0x03)) {
1016                                         dev_warn(&h->pdev->dev, "cp %p "
1017                                                 "has check condition: unit "
1018                                                 "not ready, manual "
1019                                                 "intervention required\n", cp);
1020                                         break;
1021                                 }
1022                         }
1023                         if (sense_key == ABORTED_COMMAND) {
1024                                 /* Aborted command is retryable */
1025                                 dev_warn(&h->pdev->dev, "cp %p "
1026                                         "has check condition: aborted command: "
1027                                         "ASC: 0x%x, ASCQ: 0x%x\n",
1028                                         cp, asc, ascq);
1029                                 cmd->result = DID_SOFT_ERROR << 16;
1030                                 break;
1031                         }
1032                         /* Must be some other type of check condition */
1033                         dev_warn(&h->pdev->dev, "cp %p has check condition: "
1034                                         "unknown type: "
1035                                         "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1036                                         "Returning result: 0x%x, "
1037                                         "cmd=[%02x %02x %02x %02x %02x "
1038                                         "%02x %02x %02x %02x %02x %02x "
1039                                         "%02x %02x %02x %02x %02x]\n",
1040                                         cp, sense_key, asc, ascq,
1041                                         cmd->result,
1042                                         cmd->cmnd[0], cmd->cmnd[1],
1043                                         cmd->cmnd[2], cmd->cmnd[3],
1044                                         cmd->cmnd[4], cmd->cmnd[5],
1045                                         cmd->cmnd[6], cmd->cmnd[7],
1046                                         cmd->cmnd[8], cmd->cmnd[9],
1047                                         cmd->cmnd[10], cmd->cmnd[11],
1048                                         cmd->cmnd[12], cmd->cmnd[13],
1049                                         cmd->cmnd[14], cmd->cmnd[15]);
1050                         break;
1051                 }
1052
1053
1054                 /* Problem was not a check condition
1055                  * Pass it up to the upper layers...
1056                  */
1057                 if (ei->ScsiStatus) {
1058                         dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1059                                 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1060                                 "Returning result: 0x%x\n",
1061                                 cp, ei->ScsiStatus,
1062                                 sense_key, asc, ascq,
1063                                 cmd->result);
1064                 } else {  /* scsi status is zero??? How??? */
1065                         dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1066                                 "Returning no connection.\n", cp),
1067
1068                         /* Ordinarily, this case should never happen,
1069                          * but there is a bug in some released firmware
1070                          * revisions that allows it to happen if, for
1071                          * example, a 4100 backplane loses power and
1072                          * the tape drive is in it.  We assume that
1073                          * it's a fatal error of some kind because we
1074                          * can't show that it wasn't. We will make it
1075                          * look like selection timeout since that is
1076                          * the most common reason for this to occur,
1077                          * and it's severe enough.
1078                          */
1079
1080                         cmd->result = DID_NO_CONNECT << 16;
1081                 }
1082                 break;
1083
1084         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1085                 break;
1086         case CMD_DATA_OVERRUN:
1087                 dev_warn(&h->pdev->dev, "cp %p has"
1088                         " completed with data overrun "
1089                         "reported\n", cp);
1090                 break;
1091         case CMD_INVALID: {
1092                 /* print_bytes(cp, sizeof(*cp), 1, 0);
1093                 print_cmd(cp); */
1094                 /* We get CMD_INVALID if you address a non-existent device
1095                  * instead of a selection timeout (no response).  You will
1096                  * see this if you yank out a drive, then try to access it.
1097                  * This is kind of a shame because it means that any other
1098                  * CMD_INVALID (e.g. driver bug) will get interpreted as a
1099                  * missing target. */
1100                 cmd->result = DID_NO_CONNECT << 16;
1101         }
1102                 break;
1103         case CMD_PROTOCOL_ERR:
1104                 dev_warn(&h->pdev->dev, "cp %p has "
1105                         "protocol error \n", cp);
1106                 break;
1107         case CMD_HARDWARE_ERR:
1108                 cmd->result = DID_ERROR << 16;
1109                 dev_warn(&h->pdev->dev, "cp %p had  hardware error\n", cp);
1110                 break;
1111         case CMD_CONNECTION_LOST:
1112                 cmd->result = DID_ERROR << 16;
1113                 dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1114                 break;
1115         case CMD_ABORTED:
1116                 cmd->result = DID_ABORT << 16;
1117                 dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1118                                 cp, ei->ScsiStatus);
1119                 break;
1120         case CMD_ABORT_FAILED:
1121                 cmd->result = DID_ERROR << 16;
1122                 dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1123                 break;
1124         case CMD_UNSOLICITED_ABORT:
1125                 cmd->result = DID_RESET << 16;
1126                 dev_warn(&h->pdev->dev, "cp %p aborted do to an unsolicited "
1127                         "abort\n", cp);
1128                 break;
1129         case CMD_TIMEOUT:
1130                 cmd->result = DID_TIME_OUT << 16;
1131                 dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1132                 break;
1133         default:
1134                 cmd->result = DID_ERROR << 16;
1135                 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1136                                 cp, ei->CommandStatus);
1137         }
1138         cmd->scsi_done(cmd);
1139         cmd_free(h, cp);
1140 }
1141
1142 static int hpsa_scsi_detect(struct ctlr_info *h)
1143 {
1144         struct Scsi_Host *sh;
1145         int error;
1146
1147         sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
1148         if (sh == NULL)
1149                 goto fail;
1150
1151         sh->io_port = 0;
1152         sh->n_io_port = 0;
1153         sh->this_id = -1;
1154         sh->max_channel = 3;
1155         sh->max_cmd_len = MAX_COMMAND_SIZE;
1156         sh->max_lun = HPSA_MAX_LUN;
1157         sh->max_id = HPSA_MAX_LUN;
1158         sh->can_queue = h->nr_cmds;
1159         sh->cmd_per_lun = h->nr_cmds;
1160         sh->sg_tablesize = h->maxsgentries;
1161         h->scsi_host = sh;
1162         sh->hostdata[0] = (unsigned long) h;
1163         sh->irq = h->intr[PERF_MODE_INT];
1164         sh->unique_id = sh->irq;
1165         error = scsi_add_host(sh, &h->pdev->dev);
1166         if (error)
1167                 goto fail_host_put;
1168         scsi_scan_host(sh);
1169         return 0;
1170
1171  fail_host_put:
1172         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_add_host"
1173                 " failed for controller %d\n", h->ctlr);
1174         scsi_host_put(sh);
1175         return error;
1176  fail:
1177         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_host_alloc"
1178                 " failed for controller %d\n", h->ctlr);
1179         return -ENOMEM;
1180 }
1181
1182 static void hpsa_pci_unmap(struct pci_dev *pdev,
1183         struct CommandList *c, int sg_used, int data_direction)
1184 {
1185         int i;
1186         union u64bit addr64;
1187
1188         for (i = 0; i < sg_used; i++) {
1189                 addr64.val32.lower = c->SG[i].Addr.lower;
1190                 addr64.val32.upper = c->SG[i].Addr.upper;
1191                 pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1192                         data_direction);
1193         }
1194 }
1195
1196 static void hpsa_map_one(struct pci_dev *pdev,
1197                 struct CommandList *cp,
1198                 unsigned char *buf,
1199                 size_t buflen,
1200                 int data_direction)
1201 {
1202         u64 addr64;
1203
1204         if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1205                 cp->Header.SGList = 0;
1206                 cp->Header.SGTotal = 0;
1207                 return;
1208         }
1209
1210         addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1211         cp->SG[0].Addr.lower =
1212           (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1213         cp->SG[0].Addr.upper =
1214           (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1215         cp->SG[0].Len = buflen;
1216         cp->Header.SGList = (u8) 1;   /* no. SGs contig in this cmd */
1217         cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1218 }
1219
1220 static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1221         struct CommandList *c)
1222 {
1223         DECLARE_COMPLETION_ONSTACK(wait);
1224
1225         c->waiting = &wait;
1226         enqueue_cmd_and_start_io(h, c);
1227         wait_for_completion(&wait);
1228 }
1229
1230 static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1231         struct CommandList *c, int data_direction)
1232 {
1233         int retry_count = 0;
1234
1235         do {
1236                 memset(c->err_info, 0, sizeof(c->err_info));
1237                 hpsa_scsi_do_simple_cmd_core(h, c);
1238                 retry_count++;
1239         } while (check_for_unit_attention(h, c) && retry_count <= 3);
1240         hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1241 }
1242
1243 static void hpsa_scsi_interpret_error(struct CommandList *cp)
1244 {
1245         struct ErrorInfo *ei;
1246         struct device *d = &cp->h->pdev->dev;
1247
1248         ei = cp->err_info;
1249         switch (ei->CommandStatus) {
1250         case CMD_TARGET_STATUS:
1251                 dev_warn(d, "cmd %p has completed with errors\n", cp);
1252                 dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1253                                 ei->ScsiStatus);
1254                 if (ei->ScsiStatus == 0)
1255                         dev_warn(d, "SCSI status is abnormally zero.  "
1256                         "(probably indicates selection timeout "
1257                         "reported incorrectly due to a known "
1258                         "firmware bug, circa July, 2001.)\n");
1259                 break;
1260         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1261                         dev_info(d, "UNDERRUN\n");
1262                 break;
1263         case CMD_DATA_OVERRUN:
1264                 dev_warn(d, "cp %p has completed with data overrun\n", cp);
1265                 break;
1266         case CMD_INVALID: {
1267                 /* controller unfortunately reports SCSI passthru's
1268                  * to non-existent targets as invalid commands.
1269                  */
1270                 dev_warn(d, "cp %p is reported invalid (probably means "
1271                         "target device no longer present)\n", cp);
1272                 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1273                 print_cmd(cp);  */
1274                 }
1275                 break;
1276         case CMD_PROTOCOL_ERR:
1277                 dev_warn(d, "cp %p has protocol error \n", cp);
1278                 break;
1279         case CMD_HARDWARE_ERR:
1280                 /* cmd->result = DID_ERROR << 16; */
1281                 dev_warn(d, "cp %p had hardware error\n", cp);
1282                 break;
1283         case CMD_CONNECTION_LOST:
1284                 dev_warn(d, "cp %p had connection lost\n", cp);
1285                 break;
1286         case CMD_ABORTED:
1287                 dev_warn(d, "cp %p was aborted\n", cp);
1288                 break;
1289         case CMD_ABORT_FAILED:
1290                 dev_warn(d, "cp %p reports abort failed\n", cp);
1291                 break;
1292         case CMD_UNSOLICITED_ABORT:
1293                 dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1294                 break;
1295         case CMD_TIMEOUT:
1296                 dev_warn(d, "cp %p timed out\n", cp);
1297                 break;
1298         default:
1299                 dev_warn(d, "cp %p returned unknown status %x\n", cp,
1300                                 ei->CommandStatus);
1301         }
1302 }
1303
1304 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1305                         unsigned char page, unsigned char *buf,
1306                         unsigned char bufsize)
1307 {
1308         int rc = IO_OK;
1309         struct CommandList *c;
1310         struct ErrorInfo *ei;
1311
1312         c = cmd_special_alloc(h);
1313
1314         if (c == NULL) {                        /* trouble... */
1315                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1316                 return -ENOMEM;
1317         }
1318
1319         fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD);
1320         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1321         ei = c->err_info;
1322         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1323                 hpsa_scsi_interpret_error(c);
1324                 rc = -1;
1325         }
1326         cmd_special_free(h, c);
1327         return rc;
1328 }
1329
1330 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1331 {
1332         int rc = IO_OK;
1333         struct CommandList *c;
1334         struct ErrorInfo *ei;
1335
1336         c = cmd_special_alloc(h);
1337
1338         if (c == NULL) {                        /* trouble... */
1339                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1340                 return -ENOMEM;
1341         }
1342
1343         fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
1344         hpsa_scsi_do_simple_cmd_core(h, c);
1345         /* no unmap needed here because no data xfer. */
1346
1347         ei = c->err_info;
1348         if (ei->CommandStatus != 0) {
1349                 hpsa_scsi_interpret_error(c);
1350                 rc = -1;
1351         }
1352         cmd_special_free(h, c);
1353         return rc;
1354 }
1355
1356 static void hpsa_get_raid_level(struct ctlr_info *h,
1357         unsigned char *scsi3addr, unsigned char *raid_level)
1358 {
1359         int rc;
1360         unsigned char *buf;
1361
1362         *raid_level = RAID_UNKNOWN;
1363         buf = kzalloc(64, GFP_KERNEL);
1364         if (!buf)
1365                 return;
1366         rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1367         if (rc == 0)
1368                 *raid_level = buf[8];
1369         if (*raid_level > RAID_UNKNOWN)
1370                 *raid_level = RAID_UNKNOWN;
1371         kfree(buf);
1372         return;
1373 }
1374
1375 /* Get the device id from inquiry page 0x83 */
1376 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1377         unsigned char *device_id, int buflen)
1378 {
1379         int rc;
1380         unsigned char *buf;
1381
1382         if (buflen > 16)
1383                 buflen = 16;
1384         buf = kzalloc(64, GFP_KERNEL);
1385         if (!buf)
1386                 return -1;
1387         rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1388         if (rc == 0)
1389                 memcpy(device_id, &buf[8], buflen);
1390         kfree(buf);
1391         return rc != 0;
1392 }
1393
1394 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1395                 struct ReportLUNdata *buf, int bufsize,
1396                 int extended_response)
1397 {
1398         int rc = IO_OK;
1399         struct CommandList *c;
1400         unsigned char scsi3addr[8];
1401         struct ErrorInfo *ei;
1402
1403         c = cmd_special_alloc(h);
1404         if (c == NULL) {                        /* trouble... */
1405                 dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1406                 return -1;
1407         }
1408         /* address the controller */
1409         memset(scsi3addr, 0, sizeof(scsi3addr));
1410         fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1411                 buf, bufsize, 0, scsi3addr, TYPE_CMD);
1412         if (extended_response)
1413                 c->Request.CDB[1] = extended_response;
1414         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1415         ei = c->err_info;
1416         if (ei->CommandStatus != 0 &&
1417             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1418                 hpsa_scsi_interpret_error(c);
1419                 rc = -1;
1420         }
1421         cmd_special_free(h, c);
1422         return rc;
1423 }
1424
1425 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1426                 struct ReportLUNdata *buf,
1427                 int bufsize, int extended_response)
1428 {
1429         return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1430 }
1431
1432 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1433                 struct ReportLUNdata *buf, int bufsize)
1434 {
1435         return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1436 }
1437
1438 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1439         int bus, int target, int lun)
1440 {
1441         device->bus = bus;
1442         device->target = target;
1443         device->lun = lun;
1444 }
1445
1446 static int hpsa_update_device_info(struct ctlr_info *h,
1447         unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device)
1448 {
1449 #define OBDR_TAPE_INQ_SIZE 49
1450         unsigned char *inq_buff;
1451
1452         inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1453         if (!inq_buff)
1454                 goto bail_out;
1455
1456         /* Do an inquiry to the device to see what it is. */
1457         if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1458                 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1459                 /* Inquiry failed (msg printed already) */
1460                 dev_err(&h->pdev->dev,
1461                         "hpsa_update_device_info: inquiry failed\n");
1462                 goto bail_out;
1463         }
1464
1465         this_device->devtype = (inq_buff[0] & 0x1f);
1466         memcpy(this_device->scsi3addr, scsi3addr, 8);
1467         memcpy(this_device->vendor, &inq_buff[8],
1468                 sizeof(this_device->vendor));
1469         memcpy(this_device->model, &inq_buff[16],
1470                 sizeof(this_device->model));
1471         memset(this_device->device_id, 0,
1472                 sizeof(this_device->device_id));
1473         hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1474                 sizeof(this_device->device_id));
1475
1476         if (this_device->devtype == TYPE_DISK &&
1477                 is_logical_dev_addr_mode(scsi3addr))
1478                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1479         else
1480                 this_device->raid_level = RAID_UNKNOWN;
1481
1482         kfree(inq_buff);
1483         return 0;
1484
1485 bail_out:
1486         kfree(inq_buff);
1487         return 1;
1488 }
1489
1490 static unsigned char *msa2xxx_model[] = {
1491         "MSA2012",
1492         "MSA2024",
1493         "MSA2312",
1494         "MSA2324",
1495         NULL,
1496 };
1497
1498 static int is_msa2xxx(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1499 {
1500         int i;
1501
1502         for (i = 0; msa2xxx_model[i]; i++)
1503                 if (strncmp(device->model, msa2xxx_model[i],
1504                         strlen(msa2xxx_model[i])) == 0)
1505                         return 1;
1506         return 0;
1507 }
1508
1509 /* Helper function to assign bus, target, lun mapping of devices.
1510  * Puts non-msa2xxx logical volumes on bus 0, msa2xxx logical
1511  * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1512  * Logical drive target and lun are assigned at this time, but
1513  * physical device lun and target assignment are deferred (assigned
1514  * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1515  */
1516 static void figure_bus_target_lun(struct ctlr_info *h,
1517         u8 *lunaddrbytes, int *bus, int *target, int *lun,
1518         struct hpsa_scsi_dev_t *device)
1519 {
1520         u32 lunid;
1521
1522         if (is_logical_dev_addr_mode(lunaddrbytes)) {
1523                 /* logical device */
1524                 if (unlikely(is_scsi_rev_5(h))) {
1525                         /* p1210m, logical drives lun assignments
1526                          * match SCSI REPORT LUNS data.
1527                          */
1528                         lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1529                         *bus = 0;
1530                         *target = 0;
1531                         *lun = (lunid & 0x3fff) + 1;
1532                 } else {
1533                         /* not p1210m... */
1534                         lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1535                         if (is_msa2xxx(h, device)) {
1536                                 /* msa2xxx way, put logicals on bus 1
1537                                  * and match target/lun numbers box
1538                                  * reports.
1539                                  */
1540                                 *bus = 1;
1541                                 *target = (lunid >> 16) & 0x3fff;
1542                                 *lun = lunid & 0x00ff;
1543                         } else {
1544                                 /* Traditional smart array way. */
1545                                 *bus = 0;
1546                                 *lun = 0;
1547                                 *target = lunid & 0x3fff;
1548                         }
1549                 }
1550         } else {
1551                 /* physical device */
1552                 if (is_hba_lunid(lunaddrbytes))
1553                         if (unlikely(is_scsi_rev_5(h))) {
1554                                 *bus = 0; /* put p1210m ctlr at 0,0,0 */
1555                                 *target = 0;
1556                                 *lun = 0;
1557                                 return;
1558                         } else
1559                                 *bus = 3; /* traditional smartarray */
1560                 else
1561                         *bus = 2; /* physical disk */
1562                 *target = -1;
1563                 *lun = -1; /* we will fill these in later. */
1564         }
1565 }
1566
1567 /*
1568  * If there is no lun 0 on a target, linux won't find any devices.
1569  * For the MSA2xxx boxes, we have to manually detect the enclosure
1570  * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1571  * it for some reason.  *tmpdevice is the target we're adding,
1572  * this_device is a pointer into the current element of currentsd[]
1573  * that we're building up in update_scsi_devices(), below.
1574  * lunzerobits is a bitmap that tracks which targets already have a
1575  * lun 0 assigned.
1576  * Returns 1 if an enclosure was added, 0 if not.
1577  */
1578 static int add_msa2xxx_enclosure_device(struct ctlr_info *h,
1579         struct hpsa_scsi_dev_t *tmpdevice,
1580         struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1581         int bus, int target, int lun, unsigned long lunzerobits[],
1582         int *nmsa2xxx_enclosures)
1583 {
1584         unsigned char scsi3addr[8];
1585
1586         if (test_bit(target, lunzerobits))
1587                 return 0; /* There is already a lun 0 on this target. */
1588
1589         if (!is_logical_dev_addr_mode(lunaddrbytes))
1590                 return 0; /* It's the logical targets that may lack lun 0. */
1591
1592         if (!is_msa2xxx(h, tmpdevice))
1593                 return 0; /* It's only the MSA2xxx that have this problem. */
1594
1595         if (lun == 0) /* if lun is 0, then obviously we have a lun 0. */
1596                 return 0;
1597
1598         if (is_hba_lunid(scsi3addr))
1599                 return 0; /* Don't add the RAID controller here. */
1600
1601         if (is_scsi_rev_5(h))
1602                 return 0; /* p1210m doesn't need to do this. */
1603
1604 #define MAX_MSA2XXX_ENCLOSURES 32
1605         if (*nmsa2xxx_enclosures >= MAX_MSA2XXX_ENCLOSURES) {
1606                 dev_warn(&h->pdev->dev, "Maximum number of MSA2XXX "
1607                         "enclosures exceeded.  Check your hardware "
1608                         "configuration.");
1609                 return 0;
1610         }
1611
1612         memset(scsi3addr, 0, 8);
1613         scsi3addr[3] = target;
1614         if (hpsa_update_device_info(h, scsi3addr, this_device))
1615                 return 0;
1616         (*nmsa2xxx_enclosures)++;
1617         hpsa_set_bus_target_lun(this_device, bus, target, 0);
1618         set_bit(target, lunzerobits);
1619         return 1;
1620 }
1621
1622 /*
1623  * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
1624  * logdev.  The number of luns in physdev and logdev are returned in
1625  * *nphysicals and *nlogicals, respectively.
1626  * Returns 0 on success, -1 otherwise.
1627  */
1628 static int hpsa_gather_lun_info(struct ctlr_info *h,
1629         int reportlunsize,
1630         struct ReportLUNdata *physdev, u32 *nphysicals,
1631         struct ReportLUNdata *logdev, u32 *nlogicals)
1632 {
1633         if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1634                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1635                 return -1;
1636         }
1637         *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1638         if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1639                 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1640                         "  %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1641                         *nphysicals - HPSA_MAX_PHYS_LUN);
1642                 *nphysicals = HPSA_MAX_PHYS_LUN;
1643         }
1644         if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1645                 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1646                 return -1;
1647         }
1648         *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1649         /* Reject Logicals in excess of our max capability. */
1650         if (*nlogicals > HPSA_MAX_LUN) {
1651                 dev_warn(&h->pdev->dev,
1652                         "maximum logical LUNs (%d) exceeded.  "
1653                         "%d LUNs ignored.\n", HPSA_MAX_LUN,
1654                         *nlogicals - HPSA_MAX_LUN);
1655                         *nlogicals = HPSA_MAX_LUN;
1656         }
1657         if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1658                 dev_warn(&h->pdev->dev,
1659                         "maximum logical + physical LUNs (%d) exceeded. "
1660                         "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1661                         *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1662                 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1663         }
1664         return 0;
1665 }
1666
1667 u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
1668         int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
1669         struct ReportLUNdata *logdev_list)
1670 {
1671         /* Helper function, figure out where the LUN ID info is coming from
1672          * given index i, lists of physical and logical devices, where in
1673          * the list the raid controller is supposed to appear (first or last)
1674          */
1675
1676         int logicals_start = nphysicals + (raid_ctlr_position == 0);
1677         int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
1678
1679         if (i == raid_ctlr_position)
1680                 return RAID_CTLR_LUNID;
1681
1682         if (i < logicals_start)
1683                 return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];
1684
1685         if (i < last_device)
1686                 return &logdev_list->LUN[i - nphysicals -
1687                         (raid_ctlr_position == 0)][0];
1688         BUG();
1689         return NULL;
1690 }
1691
1692 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1693 {
1694         /* the idea here is we could get notified
1695          * that some devices have changed, so we do a report
1696          * physical luns and report logical luns cmd, and adjust
1697          * our list of devices accordingly.
1698          *
1699          * The scsi3addr's of devices won't change so long as the
1700          * adapter is not reset.  That means we can rescan and
1701          * tell which devices we already know about, vs. new
1702          * devices, vs.  disappearing devices.
1703          */
1704         struct ReportLUNdata *physdev_list = NULL;
1705         struct ReportLUNdata *logdev_list = NULL;
1706         unsigned char *inq_buff = NULL;
1707         u32 nphysicals = 0;
1708         u32 nlogicals = 0;
1709         u32 ndev_allocated = 0;
1710         struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1711         int ncurrent = 0;
1712         int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1713         int i, nmsa2xxx_enclosures, ndevs_to_allocate;
1714         int bus, target, lun;
1715         int raid_ctlr_position;
1716         DECLARE_BITMAP(lunzerobits, HPSA_MAX_TARGETS_PER_CTLR);
1717
1718         currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_SCSI_DEVS_PER_HBA,
1719                 GFP_KERNEL);
1720         physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1721         logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1722         inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1723         tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1724
1725         if (!currentsd || !physdev_list || !logdev_list ||
1726                 !inq_buff || !tmpdevice) {
1727                 dev_err(&h->pdev->dev, "out of memory\n");
1728                 goto out;
1729         }
1730         memset(lunzerobits, 0, sizeof(lunzerobits));
1731
1732         if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1733                         logdev_list, &nlogicals))
1734                 goto out;
1735
1736         /* We might see up to 32 MSA2xxx enclosures, actually 8 of them
1737          * but each of them 4 times through different paths.  The plus 1
1738          * is for the RAID controller.
1739          */
1740         ndevs_to_allocate = nphysicals + nlogicals + MAX_MSA2XXX_ENCLOSURES + 1;
1741
1742         /* Allocate the per device structures */
1743         for (i = 0; i < ndevs_to_allocate; i++) {
1744                 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1745                 if (!currentsd[i]) {
1746                         dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1747                                 __FILE__, __LINE__);
1748                         goto out;
1749                 }
1750                 ndev_allocated++;
1751         }
1752
1753         if (unlikely(is_scsi_rev_5(h)))
1754                 raid_ctlr_position = 0;
1755         else
1756                 raid_ctlr_position = nphysicals + nlogicals;
1757
1758         /* adjust our table of devices */
1759         nmsa2xxx_enclosures = 0;
1760         for (i = 0; i < nphysicals + nlogicals + 1; i++) {
1761                 u8 *lunaddrbytes;
1762
1763                 /* Figure out where the LUN ID info is coming from */
1764                 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
1765                         i, nphysicals, nlogicals, physdev_list, logdev_list);
1766                 /* skip masked physical devices. */
1767                 if (lunaddrbytes[3] & 0xC0 &&
1768                         i < nphysicals + (raid_ctlr_position == 0))
1769                         continue;
1770
1771                 /* Get device type, vendor, model, device id */
1772                 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice))
1773                         continue; /* skip it if we can't talk to it. */
1774                 figure_bus_target_lun(h, lunaddrbytes, &bus, &target, &lun,
1775                         tmpdevice);
1776                 this_device = currentsd[ncurrent];
1777
1778                 /*
1779                  * For the msa2xxx boxes, we have to insert a LUN 0 which
1780                  * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
1781                  * is nonetheless an enclosure device there.  We have to
1782                  * present that otherwise linux won't find anything if
1783                  * there is no lun 0.
1784                  */
1785                 if (add_msa2xxx_enclosure_device(h, tmpdevice, this_device,
1786                                 lunaddrbytes, bus, target, lun, lunzerobits,
1787                                 &nmsa2xxx_enclosures)) {
1788                         ncurrent++;
1789                         this_device = currentsd[ncurrent];
1790                 }
1791
1792                 *this_device = *tmpdevice;
1793                 hpsa_set_bus_target_lun(this_device, bus, target, lun);
1794
1795                 switch (this_device->devtype) {
1796                 case TYPE_ROM: {
1797                         /* We don't *really* support actual CD-ROM devices,
1798                          * just "One Button Disaster Recovery" tape drive
1799                          * which temporarily pretends to be a CD-ROM drive.
1800                          * So we check that the device is really an OBDR tape
1801                          * device by checking for "$DR-10" in bytes 43-48 of
1802                          * the inquiry data.
1803                          */
1804                                 char obdr_sig[7];
1805 #define OBDR_TAPE_SIG "$DR-10"
1806                                 strncpy(obdr_sig, &inq_buff[43], 6);
1807                                 obdr_sig[6] = '\0';
1808                                 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1809                                         /* Not OBDR device, ignore it. */
1810                                         break;
1811                         }
1812                         ncurrent++;
1813                         break;
1814                 case TYPE_DISK:
1815                         if (i < nphysicals)
1816                                 break;
1817                         ncurrent++;
1818                         break;
1819                 case TYPE_TAPE:
1820                 case TYPE_MEDIUM_CHANGER:
1821                         ncurrent++;
1822                         break;
1823                 case TYPE_RAID:
1824                         /* Only present the Smartarray HBA as a RAID controller.
1825                          * If it's a RAID controller other than the HBA itself
1826                          * (an external RAID controller, MSA500 or similar)
1827                          * don't present it.
1828                          */
1829                         if (!is_hba_lunid(lunaddrbytes))
1830                                 break;
1831                         ncurrent++;
1832                         break;
1833                 default:
1834                         break;
1835                 }
1836                 if (ncurrent >= HPSA_MAX_SCSI_DEVS_PER_HBA)
1837                         break;
1838         }
1839         adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
1840 out:
1841         kfree(tmpdevice);
1842         for (i = 0; i < ndev_allocated; i++)
1843                 kfree(currentsd[i]);
1844         kfree(currentsd);
1845         kfree(inq_buff);
1846         kfree(physdev_list);
1847         kfree(logdev_list);
1848 }
1849
1850 /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1851  * dma mapping  and fills in the scatter gather entries of the
1852  * hpsa command, cp.
1853  */
1854 static int hpsa_scatter_gather(struct ctlr_info *h,
1855                 struct CommandList *cp,
1856                 struct scsi_cmnd *cmd)
1857 {
1858         unsigned int len;
1859         struct scatterlist *sg;
1860         u64 addr64;
1861         int use_sg, i, sg_index, chained;
1862         struct SGDescriptor *curr_sg;
1863
1864         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1865
1866         use_sg = scsi_dma_map(cmd);
1867         if (use_sg < 0)
1868                 return use_sg;
1869
1870         if (!use_sg)
1871                 goto sglist_finished;
1872
1873         curr_sg = cp->SG;
1874         chained = 0;
1875         sg_index = 0;
1876         scsi_for_each_sg(cmd, sg, use_sg, i) {
1877                 if (i == h->max_cmd_sg_entries - 1 &&
1878                         use_sg > h->max_cmd_sg_entries) {
1879                         chained = 1;
1880                         curr_sg = h->cmd_sg_list[cp->cmdindex];
1881                         sg_index = 0;
1882                 }
1883                 addr64 = (u64) sg_dma_address(sg);
1884                 len  = sg_dma_len(sg);
1885                 curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
1886                 curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
1887                 curr_sg->Len = len;
1888                 curr_sg->Ext = 0;  /* we are not chaining */
1889                 curr_sg++;
1890         }
1891
1892         if (use_sg + chained > h->maxSG)
1893                 h->maxSG = use_sg + chained;
1894
1895         if (chained) {
1896                 cp->Header.SGList = h->max_cmd_sg_entries;
1897                 cp->Header.SGTotal = (u16) (use_sg + 1);
1898                 hpsa_map_sg_chain_block(h, cp);
1899                 return 0;
1900         }
1901
1902 sglist_finished:
1903
1904         cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
1905         cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
1906         return 0;
1907 }
1908
1909
1910 static int hpsa_scsi_queue_command_lck(struct scsi_cmnd *cmd,
1911         void (*done)(struct scsi_cmnd *))
1912 {
1913         struct ctlr_info *h;
1914         struct hpsa_scsi_dev_t *dev;
1915         unsigned char scsi3addr[8];
1916         struct CommandList *c;
1917         unsigned long flags;
1918
1919         /* Get the ptr to our adapter structure out of cmd->host. */
1920         h = sdev_to_hba(cmd->device);
1921         dev = cmd->device->hostdata;
1922         if (!dev) {
1923                 cmd->result = DID_NO_CONNECT << 16;
1924                 done(cmd);
1925                 return 0;
1926         }
1927         memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
1928
1929         /* Need a lock as this is being allocated from the pool */
1930         spin_lock_irqsave(&h->lock, flags);
1931         c = cmd_alloc(h);
1932         spin_unlock_irqrestore(&h->lock, flags);
1933         if (c == NULL) {                        /* trouble... */
1934                 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
1935                 return SCSI_MLQUEUE_HOST_BUSY;
1936         }
1937
1938         /* Fill in the command list header */
1939
1940         cmd->scsi_done = done;    /* save this for use by completion code */
1941
1942         /* save c in case we have to abort it  */
1943         cmd->host_scribble = (unsigned char *) c;
1944
1945         c->cmd_type = CMD_SCSI;
1946         c->scsi_cmd = cmd;
1947         c->Header.ReplyQueue = 0;  /* unused in simple mode */
1948         memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1949         c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
1950         c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
1951
1952         /* Fill in the request block... */
1953
1954         c->Request.Timeout = 0;
1955         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
1956         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
1957         c->Request.CDBLen = cmd->cmd_len;
1958         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
1959         c->Request.Type.Type = TYPE_CMD;
1960         c->Request.Type.Attribute = ATTR_SIMPLE;
1961         switch (cmd->sc_data_direction) {
1962         case DMA_TO_DEVICE:
1963                 c->Request.Type.Direction = XFER_WRITE;
1964                 break;
1965         case DMA_FROM_DEVICE:
1966                 c->Request.Type.Direction = XFER_READ;
1967                 break;
1968         case DMA_NONE:
1969                 c->Request.Type.Direction = XFER_NONE;
1970                 break;
1971         case DMA_BIDIRECTIONAL:
1972                 /* This can happen if a buggy application does a scsi passthru
1973                  * and sets both inlen and outlen to non-zero. ( see
1974                  * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1975                  */
1976
1977                 c->Request.Type.Direction = XFER_RSVD;
1978                 /* This is technically wrong, and hpsa controllers should
1979                  * reject it with CMD_INVALID, which is the most correct
1980                  * response, but non-fibre backends appear to let it
1981                  * slide by, and give the same results as if this field
1982                  * were set correctly.  Either way is acceptable for
1983                  * our purposes here.
1984                  */
1985
1986                 break;
1987
1988         default:
1989                 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
1990                         cmd->sc_data_direction);
1991                 BUG();
1992                 break;
1993         }
1994
1995         if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
1996                 cmd_free(h, c);
1997                 return SCSI_MLQUEUE_HOST_BUSY;
1998         }
1999         enqueue_cmd_and_start_io(h, c);
2000         /* the cmd'll come back via intr handler in complete_scsi_command()  */
2001         return 0;
2002 }
2003
2004 static DEF_SCSI_QCMD(hpsa_scsi_queue_command)
2005
2006 static void hpsa_scan_start(struct Scsi_Host *sh)
2007 {
2008         struct ctlr_info *h = shost_to_hba(sh);
2009         unsigned long flags;
2010
2011         /* wait until any scan already in progress is finished. */
2012         while (1) {
2013                 spin_lock_irqsave(&h->scan_lock, flags);
2014                 if (h->scan_finished)
2015                         break;
2016                 spin_unlock_irqrestore(&h->scan_lock, flags);
2017                 wait_event(h->scan_wait_queue, h->scan_finished);
2018                 /* Note: We don't need to worry about a race between this
2019                  * thread and driver unload because the midlayer will
2020                  * have incremented the reference count, so unload won't
2021                  * happen if we're in here.
2022                  */
2023         }
2024         h->scan_finished = 0; /* mark scan as in progress */
2025         spin_unlock_irqrestore(&h->scan_lock, flags);
2026
2027         hpsa_update_scsi_devices(h, h->scsi_host->host_no);
2028
2029         spin_lock_irqsave(&h->scan_lock, flags);
2030         h->scan_finished = 1; /* mark scan as finished. */
2031         wake_up_all(&h->scan_wait_queue);
2032         spin_unlock_irqrestore(&h->scan_lock, flags);
2033 }
2034
2035 static int hpsa_scan_finished(struct Scsi_Host *sh,
2036         unsigned long elapsed_time)
2037 {
2038         struct ctlr_info *h = shost_to_hba(sh);
2039         unsigned long flags;
2040         int finished;
2041
2042         spin_lock_irqsave(&h->scan_lock, flags);
2043         finished = h->scan_finished;
2044         spin_unlock_irqrestore(&h->scan_lock, flags);
2045         return finished;
2046 }
2047
2048 static int hpsa_change_queue_depth(struct scsi_device *sdev,
2049         int qdepth, int reason)
2050 {
2051         struct ctlr_info *h = sdev_to_hba(sdev);
2052
2053         if (reason != SCSI_QDEPTH_DEFAULT)
2054                 return -ENOTSUPP;
2055
2056         if (qdepth < 1)
2057                 qdepth = 1;
2058         else
2059                 if (qdepth > h->nr_cmds)
2060                         qdepth = h->nr_cmds;
2061         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
2062         return sdev->queue_depth;
2063 }
2064
2065 static void hpsa_unregister_scsi(struct ctlr_info *h)
2066 {
2067         /* we are being forcibly unloaded, and may not refuse. */
2068         scsi_remove_host(h->scsi_host);
2069         scsi_host_put(h->scsi_host);
2070         h->scsi_host = NULL;
2071 }
2072
2073 static int hpsa_register_scsi(struct ctlr_info *h)
2074 {
2075         int rc;
2076
2077         rc = hpsa_scsi_detect(h);
2078         if (rc != 0)
2079                 dev_err(&h->pdev->dev, "hpsa_register_scsi: failed"
2080                         " hpsa_scsi_detect(), rc is %d\n", rc);
2081         return rc;
2082 }
2083
2084 static int wait_for_device_to_become_ready(struct ctlr_info *h,
2085         unsigned char lunaddr[])
2086 {
2087         int rc = 0;
2088         int count = 0;
2089         int waittime = 1; /* seconds */
2090         struct CommandList *c;
2091
2092         c = cmd_special_alloc(h);
2093         if (!c) {
2094                 dev_warn(&h->pdev->dev, "out of memory in "
2095                         "wait_for_device_to_become_ready.\n");
2096                 return IO_ERROR;
2097         }
2098
2099         /* Send test unit ready until device ready, or give up. */
2100         while (count < HPSA_TUR_RETRY_LIMIT) {
2101
2102                 /* Wait for a bit.  do this first, because if we send
2103                  * the TUR right away, the reset will just abort it.
2104                  */
2105                 msleep(1000 * waittime);
2106                 count++;
2107
2108                 /* Increase wait time with each try, up to a point. */
2109                 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
2110                         waittime = waittime * 2;
2111
2112                 /* Send the Test Unit Ready */
2113                 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD);
2114                 hpsa_scsi_do_simple_cmd_core(h, c);
2115                 /* no unmap needed here because no data xfer. */
2116
2117                 if (c->err_info->CommandStatus == CMD_SUCCESS)
2118                         break;
2119
2120                 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2121                         c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
2122                         (c->err_info->SenseInfo[2] == NO_SENSE ||
2123                         c->err_info->SenseInfo[2] == UNIT_ATTENTION))
2124                         break;
2125
2126                 dev_warn(&h->pdev->dev, "waiting %d secs "
2127                         "for device to become ready.\n", waittime);
2128                 rc = 1; /* device not ready. */
2129         }
2130
2131         if (rc)
2132                 dev_warn(&h->pdev->dev, "giving up on device.\n");
2133         else
2134                 dev_warn(&h->pdev->dev, "device is ready.\n");
2135
2136         cmd_special_free(h, c);
2137         return rc;
2138 }
2139
2140 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
2141  * complaining.  Doing a host- or bus-reset can't do anything good here.
2142  */
2143 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
2144 {
2145         int rc;
2146         struct ctlr_info *h;
2147         struct hpsa_scsi_dev_t *dev;
2148
2149         /* find the controller to which the command to be aborted was sent */
2150         h = sdev_to_hba(scsicmd->device);
2151         if (h == NULL) /* paranoia */
2152                 return FAILED;
2153         dev = scsicmd->device->hostdata;
2154         if (!dev) {
2155                 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2156                         "device lookup failed.\n");
2157                 return FAILED;
2158         }
2159         dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
2160                 h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2161         /* send a reset to the SCSI LUN which the command was sent to */
2162         rc = hpsa_send_reset(h, dev->scsi3addr);
2163         if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2164                 return SUCCESS;
2165
2166         dev_warn(&h->pdev->dev, "resetting device failed.\n");
2167         return FAILED;
2168 }
2169
2170 /*
2171  * For operations that cannot sleep, a command block is allocated at init,
2172  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2173  * which ones are free or in use.  Lock must be held when calling this.
2174  * cmd_free() is the complement.
2175  */
2176 static struct CommandList *cmd_alloc(struct ctlr_info *h)
2177 {
2178         struct CommandList *c;
2179         int i;
2180         union u64bit temp64;
2181         dma_addr_t cmd_dma_handle, err_dma_handle;
2182
2183         do {
2184                 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2185                 if (i == h->nr_cmds)
2186                         return NULL;
2187         } while (test_and_set_bit
2188                  (i & (BITS_PER_LONG - 1),
2189                   h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2190         c = h->cmd_pool + i;
2191         memset(c, 0, sizeof(*c));
2192         cmd_dma_handle = h->cmd_pool_dhandle
2193             + i * sizeof(*c);
2194         c->err_info = h->errinfo_pool + i;
2195         memset(c->err_info, 0, sizeof(*c->err_info));
2196         err_dma_handle = h->errinfo_pool_dhandle
2197             + i * sizeof(*c->err_info);
2198         h->nr_allocs++;
2199
2200         c->cmdindex = i;
2201
2202         INIT_HLIST_NODE(&c->list);
2203         c->busaddr = (u32) cmd_dma_handle;
2204         temp64.val = (u64) err_dma_handle;
2205         c->ErrDesc.Addr.lower = temp64.val32.lower;
2206         c->ErrDesc.Addr.upper = temp64.val32.upper;
2207         c->ErrDesc.Len = sizeof(*c->err_info);
2208
2209         c->h = h;
2210         return c;
2211 }
2212
2213 /* For operations that can wait for kmalloc to possibly sleep,
2214  * this routine can be called. Lock need not be held to call
2215  * cmd_special_alloc. cmd_special_free() is the complement.
2216  */
2217 static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2218 {
2219         struct CommandList *c;
2220         union u64bit temp64;
2221         dma_addr_t cmd_dma_handle, err_dma_handle;
2222
2223         c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2224         if (c == NULL)
2225                 return NULL;
2226         memset(c, 0, sizeof(*c));
2227
2228         c->cmdindex = -1;
2229
2230         c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2231                     &err_dma_handle);
2232
2233         if (c->err_info == NULL) {
2234                 pci_free_consistent(h->pdev,
2235                         sizeof(*c), c, cmd_dma_handle);
2236                 return NULL;
2237         }
2238         memset(c->err_info, 0, sizeof(*c->err_info));
2239
2240         INIT_HLIST_NODE(&c->list);
2241         c->busaddr = (u32) cmd_dma_handle;
2242         temp64.val = (u64) err_dma_handle;
2243         c->ErrDesc.Addr.lower = temp64.val32.lower;
2244         c->ErrDesc.Addr.upper = temp64.val32.upper;
2245         c->ErrDesc.Len = sizeof(*c->err_info);
2246
2247         c->h = h;
2248         return c;
2249 }
2250
2251 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2252 {
2253         int i;
2254
2255         i = c - h->cmd_pool;
2256         clear_bit(i & (BITS_PER_LONG - 1),
2257                   h->cmd_pool_bits + (i / BITS_PER_LONG));
2258         h->nr_frees++;
2259 }
2260
2261 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2262 {
2263         union u64bit temp64;
2264
2265         temp64.val32.lower = c->ErrDesc.Addr.lower;
2266         temp64.val32.upper = c->ErrDesc.Addr.upper;
2267         pci_free_consistent(h->pdev, sizeof(*c->err_info),
2268                             c->err_info, (dma_addr_t) temp64.val);
2269         pci_free_consistent(h->pdev, sizeof(*c),
2270                             c, (dma_addr_t) c->busaddr);
2271 }
2272
2273 #ifdef CONFIG_COMPAT
2274
2275 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2276 {
2277         IOCTL32_Command_struct __user *arg32 =
2278             (IOCTL32_Command_struct __user *) arg;
2279         IOCTL_Command_struct arg64;
2280         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2281         int err;
2282         u32 cp;
2283
2284         err = 0;
2285         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2286                            sizeof(arg64.LUN_info));
2287         err |= copy_from_user(&arg64.Request, &arg32->Request,
2288                            sizeof(arg64.Request));
2289         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2290                            sizeof(arg64.error_info));
2291         err |= get_user(arg64.buf_size, &arg32->buf_size);
2292         err |= get_user(cp, &arg32->buf);
2293         arg64.buf = compat_ptr(cp);
2294         err |= copy_to_user(p, &arg64, sizeof(arg64));
2295
2296         if (err)
2297                 return -EFAULT;
2298
2299         err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2300         if (err)
2301                 return err;
2302         err |= copy_in_user(&arg32->error_info, &p->error_info,
2303                          sizeof(arg32->error_info));
2304         if (err)
2305                 return -EFAULT;
2306         return err;
2307 }
2308
2309 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2310         int cmd, void *arg)
2311 {
2312         BIG_IOCTL32_Command_struct __user *arg32 =
2313             (BIG_IOCTL32_Command_struct __user *) arg;
2314         BIG_IOCTL_Command_struct arg64;
2315         BIG_IOCTL_Command_struct __user *p =
2316             compat_alloc_user_space(sizeof(arg64));
2317         int err;
2318         u32 cp;
2319
2320         err = 0;
2321         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2322                            sizeof(arg64.LUN_info));
2323         err |= copy_from_user(&arg64.Request, &arg32->Request,
2324                            sizeof(arg64.Request));
2325         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2326                            sizeof(arg64.error_info));
2327         err |= get_user(arg64.buf_size, &arg32->buf_size);
2328         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2329         err |= get_user(cp, &arg32->buf);
2330         arg64.buf = compat_ptr(cp);
2331         err |= copy_to_user(p, &arg64, sizeof(arg64));
2332
2333         if (err)
2334                 return -EFAULT;
2335
2336         err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2337         if (err)
2338                 return err;
2339         err |= copy_in_user(&arg32->error_info, &p->error_info,
2340                          sizeof(arg32->error_info));
2341         if (err)
2342                 return -EFAULT;
2343         return err;
2344 }
2345
2346 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2347 {
2348         switch (cmd) {
2349         case CCISS_GETPCIINFO:
2350         case CCISS_GETINTINFO:
2351         case CCISS_SETINTINFO:
2352         case CCISS_GETNODENAME:
2353         case CCISS_SETNODENAME:
2354         case CCISS_GETHEARTBEAT:
2355         case CCISS_GETBUSTYPES:
2356         case CCISS_GETFIRMVER:
2357         case CCISS_GETDRIVVER:
2358         case CCISS_REVALIDVOLS:
2359         case CCISS_DEREGDISK:
2360         case CCISS_REGNEWDISK:
2361         case CCISS_REGNEWD:
2362         case CCISS_RESCANDISK:
2363         case CCISS_GETLUNINFO:
2364                 return hpsa_ioctl(dev, cmd, arg);
2365
2366         case CCISS_PASSTHRU32:
2367                 return hpsa_ioctl32_passthru(dev, cmd, arg);
2368         case CCISS_BIG_PASSTHRU32:
2369                 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2370
2371         default:
2372                 return -ENOIOCTLCMD;
2373         }
2374 }
2375 #endif
2376
2377 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2378 {
2379         struct hpsa_pci_info pciinfo;
2380
2381         if (!argp)
2382                 return -EINVAL;
2383         pciinfo.domain = pci_domain_nr(h->pdev->bus);
2384         pciinfo.bus = h->pdev->bus->number;
2385         pciinfo.dev_fn = h->pdev->devfn;
2386         pciinfo.board_id = h->board_id;
2387         if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2388                 return -EFAULT;
2389         return 0;
2390 }
2391
2392 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2393 {
2394         DriverVer_type DriverVer;
2395         unsigned char vmaj, vmin, vsubmin;
2396         int rc;
2397
2398         rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2399                 &vmaj, &vmin, &vsubmin);
2400         if (rc != 3) {
2401                 dev_info(&h->pdev->dev, "driver version string '%s' "
2402                         "unrecognized.", HPSA_DRIVER_VERSION);
2403                 vmaj = 0;
2404                 vmin = 0;
2405                 vsubmin = 0;
2406         }
2407         DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2408         if (!argp)
2409                 return -EINVAL;
2410         if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2411                 return -EFAULT;
2412         return 0;
2413 }
2414
2415 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2416 {
2417         IOCTL_Command_struct iocommand;
2418         struct CommandList *c;
2419         char *buff = NULL;
2420         union u64bit temp64;
2421
2422         if (!argp)
2423                 return -EINVAL;
2424         if (!capable(CAP_SYS_RAWIO))
2425                 return -EPERM;
2426         if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2427                 return -EFAULT;
2428         if ((iocommand.buf_size < 1) &&
2429             (iocommand.Request.Type.Direction != XFER_NONE)) {
2430                 return -EINVAL;
2431         }
2432         if (iocommand.buf_size > 0) {
2433                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2434                 if (buff == NULL)
2435                         return -EFAULT;
2436         }
2437         if (iocommand.Request.Type.Direction == XFER_WRITE) {
2438                 /* Copy the data into the buffer we created */
2439                 if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) {
2440                         kfree(buff);
2441                         return -EFAULT;
2442                 }
2443         } else
2444                 memset(buff, 0, iocommand.buf_size);
2445         c = cmd_special_alloc(h);
2446         if (c == NULL) {
2447                 kfree(buff);
2448                 return -ENOMEM;
2449         }
2450         /* Fill in the command type */
2451         c->cmd_type = CMD_IOCTL_PEND;
2452         /* Fill in Command Header */
2453         c->Header.ReplyQueue = 0; /* unused in simple mode */
2454         if (iocommand.buf_size > 0) {   /* buffer to fill */
2455                 c->Header.SGList = 1;
2456                 c->Header.SGTotal = 1;
2457         } else  { /* no buffers to fill */
2458                 c->Header.SGList = 0;
2459                 c->Header.SGTotal = 0;
2460         }
2461         memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
2462         /* use the kernel address the cmd block for tag */
2463         c->Header.Tag.lower = c->busaddr;
2464
2465         /* Fill in Request block */
2466         memcpy(&c->Request, &iocommand.Request,
2467                 sizeof(c->Request));
2468
2469         /* Fill in the scatter gather information */
2470         if (iocommand.buf_size > 0) {
2471                 temp64.val = pci_map_single(h->pdev, buff,
2472                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
2473                 c->SG[0].Addr.lower = temp64.val32.lower;
2474                 c->SG[0].Addr.upper = temp64.val32.upper;
2475                 c->SG[0].Len = iocommand.buf_size;
2476                 c->SG[0].Ext = 0; /* we are not chaining*/
2477         }
2478         hpsa_scsi_do_simple_cmd_core(h, c);
2479         hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
2480         check_ioctl_unit_attention(h, c);
2481
2482         /* Copy the error information out */
2483         memcpy(&iocommand.error_info, c->err_info,
2484                 sizeof(iocommand.error_info));
2485         if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
2486                 kfree(buff);
2487                 cmd_special_free(h, c);
2488                 return -EFAULT;
2489         }
2490
2491         if (iocommand.Request.Type.Direction == XFER_READ) {
2492                 /* Copy the data out of the buffer we created */
2493                 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
2494                         kfree(buff);
2495                         cmd_special_free(h, c);
2496                         return -EFAULT;
2497                 }
2498         }
2499         kfree(buff);
2500         cmd_special_free(h, c);
2501         return 0;
2502 }
2503
2504 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2505 {
2506         BIG_IOCTL_Command_struct *ioc;
2507         struct CommandList *c;
2508         unsigned char **buff = NULL;
2509         int *buff_size = NULL;
2510         union u64bit temp64;
2511         BYTE sg_used = 0;
2512         int status = 0;
2513         int i;
2514         u32 left;
2515         u32 sz;
2516         BYTE __user *data_ptr;
2517
2518         if (!argp)
2519                 return -EINVAL;
2520         if (!capable(CAP_SYS_RAWIO))
2521                 return -EPERM;
2522         ioc = (BIG_IOCTL_Command_struct *)
2523             kmalloc(sizeof(*ioc), GFP_KERNEL);
2524         if (!ioc) {
2525                 status = -ENOMEM;
2526                 goto cleanup1;
2527         }
2528         if (copy_from_user(ioc, argp, sizeof(*ioc))) {
2529                 status = -EFAULT;
2530                 goto cleanup1;
2531         }
2532         if ((ioc->buf_size < 1) &&
2533             (ioc->Request.Type.Direction != XFER_NONE)) {
2534                 status = -EINVAL;
2535                 goto cleanup1;
2536         }
2537         /* Check kmalloc limits  using all SGs */
2538         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
2539                 status = -EINVAL;
2540                 goto cleanup1;
2541         }
2542         if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
2543                 status = -EINVAL;
2544                 goto cleanup1;
2545         }
2546         buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
2547         if (!buff) {
2548                 status = -ENOMEM;
2549                 goto cleanup1;
2550         }
2551         buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
2552         if (!buff_size) {
2553                 status = -ENOMEM;
2554                 goto cleanup1;
2555         }
2556         left = ioc->buf_size;
2557         data_ptr = ioc->buf;
2558         while (left) {
2559                 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
2560                 buff_size[sg_used] = sz;
2561                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
2562                 if (buff[sg_used] == NULL) {
2563                         status = -ENOMEM;
2564                         goto cleanup1;
2565                 }
2566                 if (ioc->Request.Type.Direction == XFER_WRITE) {
2567                         if (copy_from_user(buff[sg_used], data_ptr, sz)) {
2568                                 status = -ENOMEM;
2569                                 goto cleanup1;
2570                         }
2571                 } else
2572                         memset(buff[sg_used], 0, sz);
2573                 left -= sz;
2574                 data_ptr += sz;
2575                 sg_used++;
2576         }
2577         c = cmd_special_alloc(h);
2578         if (c == NULL) {
2579                 status = -ENOMEM;
2580                 goto cleanup1;
2581         }
2582         c->cmd_type = CMD_IOCTL_PEND;
2583         c->Header.ReplyQueue = 0;
2584
2585         if (ioc->buf_size > 0) {
2586                 c->Header.SGList = sg_used;
2587                 c->Header.SGTotal = sg_used;
2588         } else {
2589                 c->Header.SGList = 0;
2590                 c->Header.SGTotal = 0;
2591         }
2592         memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
2593         c->Header.Tag.lower = c->busaddr;
2594         memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
2595         if (ioc->buf_size > 0) {
2596                 int i;
2597                 for (i = 0; i < sg_used; i++) {
2598                         temp64.val = pci_map_single(h->pdev, buff[i],
2599                                     buff_size[i], PCI_DMA_BIDIRECTIONAL);
2600                         c->SG[i].Addr.lower = temp64.val32.lower;
2601                         c->SG[i].Addr.upper = temp64.val32.upper;
2602                         c->SG[i].Len = buff_size[i];
2603                         /* we are not chaining */
2604                         c->SG[i].Ext = 0;
2605                 }
2606         }
2607         hpsa_scsi_do_simple_cmd_core(h, c);
2608         hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
2609         check_ioctl_unit_attention(h, c);
2610         /* Copy the error information out */
2611         memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
2612         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
2613                 cmd_special_free(h, c);
2614                 status = -EFAULT;
2615                 goto cleanup1;
2616         }
2617         if (ioc->Request.Type.Direction == XFER_READ) {
2618                 /* Copy the data out of the buffer we created */
2619                 BYTE __user *ptr = ioc->buf;
2620                 for (i = 0; i < sg_used; i++) {
2621                         if (copy_to_user(ptr, buff[i], buff_size[i])) {
2622                                 cmd_special_free(h, c);
2623                                 status = -EFAULT;
2624                                 goto cleanup1;
2625                         }
2626                         ptr += buff_size[i];
2627                 }
2628         }
2629         cmd_special_free(h, c);
2630         status = 0;
2631 cleanup1:
2632         if (buff) {
2633                 for (i = 0; i < sg_used; i++)
2634                         kfree(buff[i]);
2635                 kfree(buff);
2636         }
2637         kfree(buff_size);
2638         kfree(ioc);
2639         return status;
2640 }
2641
2642 static void check_ioctl_unit_attention(struct ctlr_info *h,
2643         struct CommandList *c)
2644 {
2645         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2646                         c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
2647                 (void) check_for_unit_attention(h, c);
2648 }
2649 /*
2650  * ioctl
2651  */
2652 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
2653 {
2654         struct ctlr_info *h;
2655         void __user *argp = (void __user *)arg;
2656
2657         h = sdev_to_hba(dev);
2658
2659         switch (cmd) {
2660         case CCISS_DEREGDISK:
2661         case CCISS_REGNEWDISK:
2662         case CCISS_REGNEWD:
2663                 hpsa_scan_start(h->scsi_host);
2664                 return 0;
2665         case CCISS_GETPCIINFO:
2666                 return hpsa_getpciinfo_ioctl(h, argp);
2667         case CCISS_GETDRIVVER:
2668                 return hpsa_getdrivver_ioctl(h, argp);
2669         case CCISS_PASSTHRU:
2670                 return hpsa_passthru_ioctl(h, argp);
2671         case CCISS_BIG_PASSTHRU:
2672                 return hpsa_big_passthru_ioctl(h, argp);
2673         default:
2674                 return -ENOTTY;
2675         }
2676 }
2677
2678 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
2679         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
2680         int cmd_type)
2681 {
2682         int pci_dir = XFER_NONE;
2683
2684         c->cmd_type = CMD_IOCTL_PEND;
2685         c->Header.ReplyQueue = 0;
2686         if (buff != NULL && size > 0) {
2687                 c->Header.SGList = 1;
2688                 c->Header.SGTotal = 1;
2689         } else {
2690                 c->Header.SGList = 0;
2691                 c->Header.SGTotal = 0;
2692         }
2693         c->Header.Tag.lower = c->busaddr;
2694         memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2695
2696         c->Request.Type.Type = cmd_type;
2697         if (cmd_type == TYPE_CMD) {
2698                 switch (cmd) {
2699                 case HPSA_INQUIRY:
2700                         /* are we trying to read a vital product page */
2701                         if (page_code != 0) {
2702                                 c->Request.CDB[1] = 0x01;
2703                                 c->Request.CDB[2] = page_code;
2704                         }
2705                         c->Request.CDBLen = 6;
2706                         c->Request.Type.Attribute = ATTR_SIMPLE;
2707                         c->Request.Type.Direction = XFER_READ;
2708                         c->Request.Timeout = 0;
2709                         c->Request.CDB[0] = HPSA_INQUIRY;
2710                         c->Request.CDB[4] = size & 0xFF;
2711                         break;
2712                 case HPSA_REPORT_LOG:
2713                 case HPSA_REPORT_PHYS:
2714                         /* Talking to controller so It's a physical command
2715                            mode = 00 target = 0.  Nothing to write.
2716                          */
2717                         c->Request.CDBLen = 12;
2718                         c->Request.Type.Attribute = ATTR_SIMPLE;
2719                         c->Request.Type.Direction = XFER_READ;
2720                         c->Request.Timeout = 0;
2721                         c->Request.CDB[0] = cmd;
2722                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2723                         c->Request.CDB[7] = (size >> 16) & 0xFF;
2724                         c->Request.CDB[8] = (size >> 8) & 0xFF;
2725                         c->Request.CDB[9] = size & 0xFF;
2726                         break;
2727                 case HPSA_CACHE_FLUSH:
2728                         c->Request.CDBLen = 12;
2729                         c->Request.Type.Attribute = ATTR_SIMPLE;
2730                         c->Request.Type.Direction = XFER_WRITE;
2731                         c->Request.Timeout = 0;
2732                         c->Request.CDB[0] = BMIC_WRITE;
2733                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2734                         break;
2735                 case TEST_UNIT_READY:
2736                         c->Request.CDBLen = 6;
2737                         c->Request.Type.Attribute = ATTR_SIMPLE;
2738                         c->Request.Type.Direction = XFER_NONE;
2739                         c->Request.Timeout = 0;
2740                         break;
2741                 default:
2742                         dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
2743                         BUG();
2744                         return;
2745                 }
2746         } else if (cmd_type == TYPE_MSG) {
2747                 switch (cmd) {
2748
2749                 case  HPSA_DEVICE_RESET_MSG:
2750                         c->Request.CDBLen = 16;
2751                         c->Request.Type.Type =  1; /* It is a MSG not a CMD */
2752                         c->Request.Type.Attribute = ATTR_SIMPLE;
2753                         c->Request.Type.Direction = XFER_NONE;
2754                         c->Request.Timeout = 0; /* Don't time out */
2755                         c->Request.CDB[0] =  0x01; /* RESET_MSG is 0x01 */
2756                         c->Request.CDB[1] = 0x03;  /* Reset target above */
2757                         /* If bytes 4-7 are zero, it means reset the */
2758                         /* LunID device */
2759                         c->Request.CDB[4] = 0x00;
2760                         c->Request.CDB[5] = 0x00;
2761                         c->Request.CDB[6] = 0x00;
2762                         c->Request.CDB[7] = 0x00;
2763                 break;
2764
2765                 default:
2766                         dev_warn(&h->pdev->dev, "unknown message type %d\n",
2767                                 cmd);
2768                         BUG();
2769                 }
2770         } else {
2771                 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
2772                 BUG();
2773         }
2774
2775         switch (c->Request.Type.Direction) {
2776         case XFER_READ:
2777                 pci_dir = PCI_DMA_FROMDEVICE;
2778                 break;
2779         case XFER_WRITE:
2780                 pci_dir = PCI_DMA_TODEVICE;
2781                 break;
2782         case XFER_NONE:
2783                 pci_dir = PCI_DMA_NONE;
2784                 break;
2785         default:
2786                 pci_dir = PCI_DMA_BIDIRECTIONAL;
2787         }
2788
2789         hpsa_map_one(h->pdev, c, buff, size, pci_dir);
2790
2791         return;
2792 }
2793
2794 /*
2795  * Map (physical) PCI mem into (virtual) kernel space
2796  */
2797 static void __iomem *remap_pci_mem(ulong base, ulong size)
2798 {
2799         ulong page_base = ((ulong) base) & PAGE_MASK;
2800         ulong page_offs = ((ulong) base) - page_base;
2801         void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2802
2803         return page_remapped ? (page_remapped + page_offs) : NULL;
2804 }
2805
2806 /* Takes cmds off the submission queue and sends them to the hardware,
2807  * then puts them on the queue of cmds waiting for completion.
2808  */
2809 static void start_io(struct ctlr_info *h)
2810 {
2811         struct CommandList *c;
2812
2813         while (!hlist_empty(&h->reqQ)) {
2814                 c = hlist_entry(h->reqQ.first, struct CommandList, list);
2815                 /* can't do anything if fifo is full */
2816                 if ((h->access.fifo_full(h))) {
2817                         dev_warn(&h->pdev->dev, "fifo full\n");
2818                         break;
2819                 }
2820
2821                 /* Get the first entry from the Request Q */
2822                 removeQ(c);
2823                 h->Qdepth--;
2824
2825                 /* Tell the controller execute command */
2826                 h->access.submit_command(h, c);
2827
2828                 /* Put job onto the completed Q */
2829                 addQ(&h->cmpQ, c);
2830         }
2831 }
2832
2833 static inline unsigned long get_next_completion(struct ctlr_info *h)
2834 {
2835         return h->access.command_completed(h);
2836 }
2837
2838 static inline bool interrupt_pending(struct ctlr_info *h)
2839 {
2840         return h->access.intr_pending(h);
2841 }
2842
2843 static inline long interrupt_not_for_us(struct ctlr_info *h)
2844 {
2845         return (h->access.intr_pending(h) == 0) ||
2846                 (h->interrupts_enabled == 0);
2847 }
2848
2849 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
2850         u32 raw_tag)
2851 {
2852         if (unlikely(tag_index >= h->nr_cmds)) {
2853                 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
2854                 return 1;
2855         }
2856         return 0;
2857 }
2858
2859 static inline void finish_cmd(struct CommandList *c, u32 raw_tag)
2860 {
2861         removeQ(c);
2862         if (likely(c->cmd_type == CMD_SCSI))
2863                 complete_scsi_command(c, 0, raw_tag);
2864         else if (c->cmd_type == CMD_IOCTL_PEND)
2865                 complete(c->waiting);
2866 }
2867
2868 static inline u32 hpsa_tag_contains_index(u32 tag)
2869 {
2870 #define DIRECT_LOOKUP_BIT 0x10
2871         return tag & DIRECT_LOOKUP_BIT;
2872 }
2873
2874 static inline u32 hpsa_tag_to_index(u32 tag)
2875 {
2876 #define DIRECT_LOOKUP_SHIFT 5
2877         return tag >> DIRECT_LOOKUP_SHIFT;
2878 }
2879
2880 static inline u32 hpsa_tag_discard_error_bits(u32 tag)
2881 {
2882 #define HPSA_ERROR_BITS 0x03
2883         return tag & ~HPSA_ERROR_BITS;
2884 }
2885
2886 /* process completion of an indexed ("direct lookup") command */
2887 static inline u32 process_indexed_cmd(struct ctlr_info *h,
2888         u32 raw_tag)
2889 {
2890         u32 tag_index;
2891         struct CommandList *c;
2892
2893         tag_index = hpsa_tag_to_index(raw_tag);
2894         if (bad_tag(h, tag_index, raw_tag))
2895                 return next_command(h);
2896         c = h->cmd_pool + tag_index;
2897         finish_cmd(c, raw_tag);
2898         return next_command(h);
2899 }
2900
2901 /* process completion of a non-indexed command */
2902 static inline u32 process_nonindexed_cmd(struct ctlr_info *h,
2903         u32 raw_tag)
2904 {
2905         u32 tag;
2906         struct CommandList *c = NULL;
2907         struct hlist_node *tmp;
2908
2909         tag = hpsa_tag_discard_error_bits(raw_tag);
2910         hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
2911                 if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
2912                         finish_cmd(c, raw_tag);
2913                         return next_command(h);
2914                 }
2915         }
2916         bad_tag(h, h->nr_cmds + 1, raw_tag);
2917         return next_command(h);
2918 }
2919
2920 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id)
2921 {
2922         struct ctlr_info *h = dev_id;
2923         unsigned long flags;
2924         u32 raw_tag;
2925
2926         if (interrupt_not_for_us(h))
2927                 return IRQ_NONE;
2928         spin_lock_irqsave(&h->lock, flags);
2929         while (interrupt_pending(h)) {
2930                 raw_tag = get_next_completion(h);
2931                 while (raw_tag != FIFO_EMPTY) {
2932                         if (hpsa_tag_contains_index(raw_tag))
2933                                 raw_tag = process_indexed_cmd(h, raw_tag);
2934                         else
2935                                 raw_tag = process_nonindexed_cmd(h, raw_tag);
2936                 }
2937         }
2938         spin_unlock_irqrestore(&h->lock, flags);
2939         return IRQ_HANDLED;
2940 }
2941
2942 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id)
2943 {
2944         struct ctlr_info *h = dev_id;
2945         unsigned long flags;
2946         u32 raw_tag;
2947
2948         spin_lock_irqsave(&h->lock, flags);
2949         raw_tag = get_next_completion(h);
2950         while (raw_tag != FIFO_EMPTY) {
2951                 if (hpsa_tag_contains_index(raw_tag))
2952                         raw_tag = process_indexed_cmd(h, raw_tag);
2953                 else
2954                         raw_tag = process_nonindexed_cmd(h, raw_tag);
2955         }
2956         spin_unlock_irqrestore(&h->lock, flags);
2957         return IRQ_HANDLED;
2958 }
2959
2960 /* Send a message CDB to the firmware. */
2961 static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
2962                                                 unsigned char type)
2963 {
2964         struct Command {
2965                 struct CommandListHeader CommandHeader;
2966                 struct RequestBlock Request;
2967                 struct ErrDescriptor ErrorDescriptor;
2968         };
2969         struct Command *cmd;
2970         static const size_t cmd_sz = sizeof(*cmd) +
2971                                         sizeof(cmd->ErrorDescriptor);
2972         dma_addr_t paddr64;
2973         uint32_t paddr32, tag;
2974         void __iomem *vaddr;
2975         int i, err;
2976
2977         vaddr = pci_ioremap_bar(pdev, 0);
2978         if (vaddr == NULL)
2979                 return -ENOMEM;
2980
2981         /* The Inbound Post Queue only accepts 32-bit physical addresses for the
2982          * CCISS commands, so they must be allocated from the lower 4GiB of
2983          * memory.
2984          */
2985         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2986         if (err) {
2987                 iounmap(vaddr);
2988                 return -ENOMEM;
2989         }
2990
2991         cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
2992         if (cmd == NULL) {
2993                 iounmap(vaddr);
2994                 return -ENOMEM;
2995         }
2996
2997         /* This must fit, because of the 32-bit consistent DMA mask.  Also,
2998          * although there's no guarantee, we assume that the address is at
2999          * least 4-byte aligned (most likely, it's page-aligned).
3000          */
3001         paddr32 = paddr64;
3002
3003         cmd->CommandHeader.ReplyQueue = 0;
3004         cmd->CommandHeader.SGList = 0;
3005         cmd->CommandHeader.SGTotal = 0;
3006         cmd->CommandHeader.Tag.lower = paddr32;
3007         cmd->CommandHeader.Tag.upper = 0;
3008         memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3009
3010         cmd->Request.CDBLen = 16;
3011         cmd->Request.Type.Type = TYPE_MSG;
3012         cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3013         cmd->Request.Type.Direction = XFER_NONE;
3014         cmd->Request.Timeout = 0; /* Don't time out */
3015         cmd->Request.CDB[0] = opcode;
3016         cmd->Request.CDB[1] = type;
3017         memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
3018         cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
3019         cmd->ErrorDescriptor.Addr.upper = 0;
3020         cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
3021
3022         writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3023
3024         for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
3025                 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3026                 if (hpsa_tag_discard_error_bits(tag) == paddr32)
3027                         break;
3028                 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
3029         }
3030
3031         iounmap(vaddr);
3032
3033         /* we leak the DMA buffer here ... no choice since the controller could
3034          *  still complete the command.
3035          */
3036         if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
3037                 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
3038                         opcode, type);
3039                 return -ETIMEDOUT;
3040         }
3041
3042         pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3043
3044         if (tag & HPSA_ERROR_BIT) {
3045                 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
3046                         opcode, type);
3047                 return -EIO;
3048         }
3049
3050         dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
3051                 opcode, type);
3052         return 0;
3053 }
3054
3055 #define hpsa_soft_reset_controller(p) hpsa_message(p, 1, 0)
3056 #define hpsa_noop(p) hpsa_message(p, 3, 0)
3057
3058 static __devinit int hpsa_reset_msi(struct pci_dev *pdev)
3059 {
3060 /* the #defines are stolen from drivers/pci/msi.h. */
3061 #define msi_control_reg(base)           (base + PCI_MSI_FLAGS)
3062 #define PCI_MSIX_FLAGS_ENABLE           (1 << 15)
3063
3064         int pos;
3065         u16 control = 0;
3066
3067         pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
3068         if (pos) {
3069                 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3070                 if (control & PCI_MSI_FLAGS_ENABLE) {
3071                         dev_info(&pdev->dev, "resetting MSI\n");
3072                         pci_write_config_word(pdev, msi_control_reg(pos),
3073                                         control & ~PCI_MSI_FLAGS_ENABLE);
3074                 }
3075         }
3076
3077         pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3078         if (pos) {
3079                 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3080                 if (control & PCI_MSIX_FLAGS_ENABLE) {
3081                         dev_info(&pdev->dev, "resetting MSI-X\n");
3082                         pci_write_config_word(pdev, msi_control_reg(pos),
3083                                         control & ~PCI_MSIX_FLAGS_ENABLE);
3084                 }
3085         }
3086
3087         return 0;
3088 }
3089
3090 static int hpsa_controller_hard_reset(struct pci_dev *pdev,
3091         void * __iomem vaddr, bool use_doorbell)
3092 {
3093         u16 pmcsr;
3094         int pos;
3095
3096         if (use_doorbell) {
3097                 /* For everything after the P600, the PCI power state method
3098                  * of resetting the controller doesn't work, so we have this
3099                  * other way using the doorbell register.
3100                  */
3101                 dev_info(&pdev->dev, "using doorbell to reset controller\n");
3102                 writel(DOORBELL_CTLR_RESET, vaddr + SA5_DOORBELL);
3103                 msleep(1000);
3104         } else { /* Try to do it the PCI power state way */
3105
3106                 /* Quoting from the Open CISS Specification: "The Power
3107                  * Management Control/Status Register (CSR) controls the power
3108                  * state of the device.  The normal operating state is D0,
3109                  * CSR=00h.  The software off state is D3, CSR=03h.  To reset
3110                  * the controller, place the interface device in D3 then to D0,
3111                  * this causes a secondary PCI reset which will reset the
3112                  * controller." */
3113
3114                 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3115                 if (pos == 0) {
3116                         dev_err(&pdev->dev,
3117                                 "hpsa_reset_controller: "
3118                                 "PCI PM not supported\n");
3119                         return -ENODEV;
3120                 }
3121                 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
3122                 /* enter the D3hot power management state */
3123                 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3124                 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3125                 pmcsr |= PCI_D3hot;
3126                 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3127
3128                 msleep(500);
3129
3130                 /* enter the D0 power management state */
3131                 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3132                 pmcsr |= PCI_D0;
3133                 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3134
3135                 msleep(500);
3136         }
3137         return 0;
3138 }
3139
3140 /* This does a hard reset of the controller using PCI power management
3141  * states or the using the doorbell register.
3142  */
3143 static __devinit int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
3144 {
3145         u16 saved_config_space[32];
3146         u64 cfg_offset;
3147         u32 cfg_base_addr;
3148         u64 cfg_base_addr_index;
3149         void __iomem *vaddr;
3150         unsigned long paddr;
3151         u32 misc_fw_support, active_transport;
3152         int rc, i;
3153         struct CfgTable __iomem *cfgtable;
3154         bool use_doorbell;
3155         u32 board_id;
3156
3157         /* For controllers as old as the P600, this is very nearly
3158          * the same thing as
3159          *
3160          * pci_save_state(pci_dev);
3161          * pci_set_power_state(pci_dev, PCI_D3hot);
3162          * pci_set_power_state(pci_dev, PCI_D0);
3163          * pci_restore_state(pci_dev);
3164          *
3165          * but we can't use these nice canned kernel routines on
3166          * kexec, because they also check the MSI/MSI-X state in PCI
3167          * configuration space and do the wrong thing when it is
3168          * set/cleared.  Also, the pci_save/restore_state functions
3169          * violate the ordering requirements for restoring the
3170          * configuration space from the CCISS document (see the
3171          * comment below).  So we roll our own ....
3172          *
3173          * For controllers newer than the P600, the pci power state
3174          * method of resetting doesn't work so we have another way
3175          * using the doorbell register.
3176          */
3177
3178         /* Exclude 640x boards.  These are two pci devices in one slot
3179          * which share a battery backed cache module.  One controls the
3180          * cache, the other accesses the cache through the one that controls
3181          * it.  If we reset the one controlling the cache, the other will
3182          * likely not be happy.  Just forbid resetting this conjoined mess.
3183          * The 640x isn't really supported by hpsa anyway.
3184          */
3185         hpsa_lookup_board_id(pdev, &board_id);
3186         if (board_id == 0x409C0E11 || board_id == 0x409D0E11)
3187                 return -ENOTSUPP;
3188
3189         for (i = 0; i < 32; i++)
3190                 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
3191
3192
3193         /* find the first memory BAR, so we can find the cfg table */
3194         rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
3195         if (rc)
3196                 return rc;
3197         vaddr = remap_pci_mem(paddr, 0x250);
3198         if (!vaddr)
3199                 return -ENOMEM;
3200
3201         /* find cfgtable in order to check if reset via doorbell is supported */
3202         rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
3203                                         &cfg_base_addr_index, &cfg_offset);
3204         if (rc)
3205                 goto unmap_vaddr;
3206         cfgtable = remap_pci_mem(pci_resource_start(pdev,
3207                        cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
3208         if (!cfgtable) {
3209                 rc = -ENOMEM;
3210                 goto unmap_vaddr;
3211         }
3212
3213         /* If reset via doorbell register is supported, use that. */
3214         misc_fw_support = readl(&cfgtable->misc_fw_support);
3215         use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
3216
3217         /* The doorbell reset seems to cause lockups on some Smart
3218          * Arrays (e.g. P410, P410i, maybe others).  Until this is
3219          * fixed or at least isolated, avoid the doorbell reset.
3220          */
3221         use_doorbell = 0;
3222
3223         rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
3224         if (rc)
3225                 goto unmap_cfgtable;
3226
3227         /* Restore the PCI configuration space.  The Open CISS
3228          * Specification says, "Restore the PCI Configuration
3229          * Registers, offsets 00h through 60h. It is important to
3230          * restore the command register, 16-bits at offset 04h,
3231          * last. Do not restore the configuration status register,
3232          * 16-bits at offset 06h."  Note that the offset is 2*i.
3233          */
3234         for (i = 0; i < 32; i++) {
3235                 if (i == 2 || i == 3)
3236                         continue;
3237                 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
3238         }
3239         wmb();
3240         pci_write_config_word(pdev, 4, saved_config_space[2]);
3241
3242         /* Some devices (notably the HP Smart Array 5i Controller)
3243            need a little pause here */
3244         msleep(HPSA_POST_RESET_PAUSE_MSECS);
3245
3246         /* Controller should be in simple mode at this point.  If it's not,
3247          * It means we're on one of those controllers which doesn't support
3248          * the doorbell reset method and on which the PCI power management reset
3249          * method doesn't work (P800, for example.)
3250          * In those cases, pretend the reset worked and hope for the best.
3251          */
3252         active_transport = readl(&cfgtable->TransportActive);
3253         if (active_transport & PERFORMANT_MODE) {
3254                 dev_warn(&pdev->dev, "Unable to successfully reset controller,"
3255                         " proceeding anyway.\n");
3256                 rc = -ENOTSUPP;
3257         }
3258
3259 unmap_cfgtable:
3260         iounmap(cfgtable);
3261
3262 unmap_vaddr:
3263         iounmap(vaddr);
3264         return rc;
3265 }
3266
3267 /*
3268  *  We cannot read the structure directly, for portability we must use
3269  *   the io functions.
3270  *   This is for debug only.
3271  */
3272 static void print_cfg_table(struct device *dev, struct CfgTable *tb)
3273 {
3274 #ifdef HPSA_DEBUG
3275         int i;
3276         char temp_name[17];
3277
3278         dev_info(dev, "Controller Configuration information\n");
3279         dev_info(dev, "------------------------------------\n");
3280         for (i = 0; i < 4; i++)
3281                 temp_name[i] = readb(&(tb->Signature[i]));
3282         temp_name[4] = '\0';
3283         dev_info(dev, "   Signature = %s\n", temp_name);
3284         dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
3285         dev_info(dev, "   Transport methods supported = 0x%x\n",
3286                readl(&(tb->TransportSupport)));
3287         dev_info(dev, "   Transport methods active = 0x%x\n",
3288                readl(&(tb->TransportActive)));
3289         dev_info(dev, "   Requested transport Method = 0x%x\n",
3290                readl(&(tb->HostWrite.TransportRequest)));
3291         dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
3292                readl(&(tb->HostWrite.CoalIntDelay)));
3293         dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
3294                readl(&(tb->HostWrite.CoalIntCount)));
3295         dev_info(dev, "   Max outstanding commands = 0x%d\n",
3296                readl(&(tb->CmdsOutMax)));
3297         dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3298         for (i = 0; i < 16; i++)
3299                 temp_name[i] = readb(&(tb->ServerName[i]));
3300         temp_name[16] = '\0';
3301         dev_info(dev, "   Server Name = %s\n", temp_name);
3302         dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
3303                 readl(&(tb->HeartBeat)));
3304 #endif                          /* HPSA_DEBUG */
3305 }
3306
3307 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3308 {
3309         int i, offset, mem_type, bar_type;
3310
3311         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3312                 return 0;
3313         offset = 0;
3314         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3315                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3316                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3317                         offset += 4;
3318                 else {
3319                         mem_type = pci_resource_flags(pdev, i) &
3320                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3321                         switch (mem_type) {
3322                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
3323                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3324                                 offset += 4;    /* 32 bit */
3325                                 break;
3326                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
3327                                 offset += 8;
3328                                 break;
3329                         default:        /* reserved in PCI 2.2 */
3330                                 dev_warn(&pdev->dev,
3331                                        "base address is invalid\n");
3332                                 return -1;
3333                                 break;
3334                         }
3335                 }
3336                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3337                         return i + 1;
3338         }
3339         return -1;
3340 }
3341
3342 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3343  * controllers that are capable. If not, we use IO-APIC mode.
3344  */
3345
3346 static void __devinit hpsa_interrupt_mode(struct ctlr_info *h)
3347 {
3348 #ifdef CONFIG_PCI_MSI
3349         int err;
3350         struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1},
3351         {0, 2}, {0, 3}
3352         };
3353
3354         /* Some boards advertise MSI but don't really support it */
3355         if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
3356             (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
3357                 goto default_int_mode;
3358         if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
3359                 dev_info(&h->pdev->dev, "MSIX\n");
3360                 err = pci_enable_msix(h->pdev, hpsa_msix_entries, 4);
3361                 if (!err) {
3362                         h->intr[0] = hpsa_msix_entries[0].vector;
3363                         h->intr[1] = hpsa_msix_entries[1].vector;
3364                         h->intr[2] = hpsa_msix_entries[2].vector;
3365                         h->intr[3] = hpsa_msix_entries[3].vector;
3366                         h->msix_vector = 1;
3367                         return;
3368                 }
3369                 if (err > 0) {
3370                         dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
3371                                "available\n", err);
3372                         goto default_int_mode;
3373                 } else {
3374                         dev_warn(&h->pdev->dev, "MSI-X init failed %d\n",
3375                                err);
3376                         goto default_int_mode;
3377                 }
3378         }
3379         if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
3380                 dev_info(&h->pdev->dev, "MSI\n");
3381                 if (!pci_enable_msi(h->pdev))
3382                         h->msi_vector = 1;
3383                 else
3384                         dev_warn(&h->pdev->dev, "MSI init failed\n");
3385         }
3386 default_int_mode:
3387 #endif                          /* CONFIG_PCI_MSI */
3388         /* if we get here we're going to use the default interrupt mode */
3389         h->intr[PERF_MODE_INT] = h->pdev->irq;
3390 }
3391
3392 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
3393 {
3394         int i;
3395         u32 subsystem_vendor_id, subsystem_device_id;
3396
3397         subsystem_vendor_id = pdev->subsystem_vendor;
3398         subsystem_device_id = pdev->subsystem_device;
3399         *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
3400                     subsystem_vendor_id;
3401
3402         for (i = 0; i < ARRAY_SIZE(products); i++)
3403                 if (*board_id == products[i].board_id)
3404                         return i;
3405
3406         if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
3407                 subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
3408                 !hpsa_allow_any) {
3409                 dev_warn(&pdev->dev, "unrecognized board ID: "
3410                         "0x%08x, ignoring.\n", *board_id);
3411                         return -ENODEV;
3412         }
3413         return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
3414 }
3415
3416 static inline bool hpsa_board_disabled(struct pci_dev *pdev)
3417 {
3418         u16 command;
3419
3420         (void) pci_read_config_word(pdev, PCI_COMMAND, &command);
3421         return ((command & PCI_COMMAND_MEMORY) == 0);
3422 }
3423
3424 static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
3425         unsigned long *memory_bar)
3426 {
3427         int i;
3428
3429         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
3430                 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
3431                         /* addressing mode bits already removed */
3432                         *memory_bar = pci_resource_start(pdev, i);
3433                         dev_dbg(&pdev->dev, "memory BAR = %lx\n",
3434                                 *memory_bar);
3435                         return 0;
3436                 }
3437         dev_warn(&pdev->dev, "no memory BAR found\n");
3438         return -ENODEV;
3439 }
3440
3441 static int __devinit hpsa_wait_for_board_ready(struct ctlr_info *h)
3442 {
3443         int i;
3444         u32 scratchpad;
3445
3446         for (i = 0; i < HPSA_BOARD_READY_ITERATIONS; i++) {
3447                 scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
3448                 if (scratchpad == HPSA_FIRMWARE_READY)
3449                         return 0;
3450                 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
3451         }
3452         dev_warn(&h->pdev->dev, "board not ready, timed out.\n");
3453         return -ENODEV;
3454 }
3455
3456 static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev,
3457         void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
3458         u64 *cfg_offset)
3459 {
3460         *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
3461         *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
3462         *cfg_base_addr &= (u32) 0x0000ffff;
3463         *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
3464         if (*cfg_base_addr_index == -1) {
3465                 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
3466                 return -ENODEV;
3467         }
3468         return 0;
3469 }
3470
3471 static int __devinit hpsa_find_cfgtables(struct ctlr_info *h)
3472 {
3473         u64 cfg_offset;
3474         u32 cfg_base_addr;
3475         u64 cfg_base_addr_index;
3476         u32 trans_offset;
3477         int rc;
3478
3479         rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
3480                 &cfg_base_addr_index, &cfg_offset);
3481         if (rc)
3482                 return rc;
3483         h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
3484                        cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
3485         if (!h->cfgtable)
3486                 return -ENOMEM;
3487         /* Find performant mode table. */
3488         trans_offset = readl(&h->cfgtable->TransMethodOffset);
3489         h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
3490                                 cfg_base_addr_index)+cfg_offset+trans_offset,
3491                                 sizeof(*h->transtable));
3492         if (!h->transtable)
3493                 return -ENOMEM;
3494         return 0;
3495 }
3496
3497 static void __devinit hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
3498 {
3499         h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
3500         if (h->max_commands < 16) {
3501                 dev_warn(&h->pdev->dev, "Controller reports "
3502                         "max supported commands of %d, an obvious lie. "
3503                         "Using 16.  Ensure that firmware is up to date.\n",
3504                         h->max_commands);
3505                 h->max_commands = 16;
3506         }
3507 }
3508
3509 /* Interrogate the hardware for some limits:
3510  * max commands, max SG elements without chaining, and with chaining,
3511  * SG chain block size, etc.
3512  */
3513 static void __devinit hpsa_find_board_params(struct ctlr_info *h)
3514 {
3515         hpsa_get_max_perf_mode_cmds(h);
3516         h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
3517         h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
3518         /*
3519          * Limit in-command s/g elements to 32 save dma'able memory.
3520          * Howvever spec says if 0, use 31
3521          */
3522         h->max_cmd_sg_entries = 31;
3523         if (h->maxsgentries > 512) {
3524                 h->max_cmd_sg_entries = 32;
3525                 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
3526                 h->maxsgentries--; /* save one for chain pointer */
3527         } else {
3528                 h->maxsgentries = 31; /* default to traditional values */
3529                 h->chainsize = 0;
3530         }
3531 }
3532
3533 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
3534 {
3535         if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
3536             (readb(&h->cfgtable->Signature[1]) != 'I') ||
3537             (readb(&h->cfgtable->Signature[2]) != 'S') ||
3538             (readb(&h->cfgtable->Signature[3]) != 'S')) {
3539                 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
3540                 return false;
3541         }
3542         return true;
3543 }
3544
3545 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3546 static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
3547 {
3548 #ifdef CONFIG_X86
3549         u32 prefetch;
3550
3551         prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
3552         prefetch |= 0x100;
3553         writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
3554 #endif
3555 }
3556
3557 /* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
3558  * in a prefetch beyond physical memory.
3559  */
3560 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
3561 {
3562         u32 dma_prefetch;
3563
3564         if (h->board_id != 0x3225103C)
3565                 return;
3566         dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
3567         dma_prefetch |= 0x8000;
3568         writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
3569 }
3570
3571 static void __devinit hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
3572 {
3573         int i;
3574
3575         /* under certain very rare conditions, this can take awhile.
3576          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3577          * as we enter this code.)
3578          */
3579         for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3580                 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3581                         break;
3582                 /* delay and try again */
3583                 msleep(10);
3584         }
3585 }
3586
3587 static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h)
3588 {
3589         u32 trans_support;
3590
3591         trans_support = readl(&(h->cfgtable->TransportSupport));
3592         if (!(trans_support & SIMPLE_MODE))
3593                 return -ENOTSUPP;
3594
3595         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3596         /* Update the field, and then ring the doorbell */
3597         writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
3598         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3599         hpsa_wait_for_mode_change_ack(h);
3600         print_cfg_table(&h->pdev->dev, h->cfgtable);
3601         if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3602                 dev_warn(&h->pdev->dev,
3603                         "unable to get board into simple mode\n");
3604                 return -ENODEV;
3605         }
3606         return 0;
3607 }
3608
3609 static int __devinit hpsa_pci_init(struct ctlr_info *h)
3610 {
3611         int prod_index, err;
3612
3613         prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
3614         if (prod_index < 0)
3615                 return -ENODEV;
3616         h->product_name = products[prod_index].product_name;
3617         h->access = *(products[prod_index].access);
3618
3619         if (hpsa_board_disabled(h->pdev)) {
3620                 dev_warn(&h->pdev->dev, "controller appears to be disabled\n");
3621                 return -ENODEV;
3622         }
3623         err = pci_enable_device(h->pdev);
3624         if (err) {
3625                 dev_warn(&h->pdev->dev, "unable to enable PCI device\n");
3626                 return err;
3627         }
3628
3629         err = pci_request_regions(h->pdev, "hpsa");
3630         if (err) {
3631                 dev_err(&h->pdev->dev,
3632                         "cannot obtain PCI resources, aborting\n");
3633                 return err;
3634         }
3635         hpsa_interrupt_mode(h);
3636         err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
3637         if (err)
3638                 goto err_out_free_res;
3639         h->vaddr = remap_pci_mem(h->paddr, 0x250);
3640         if (!h->vaddr) {
3641                 err = -ENOMEM;
3642                 goto err_out_free_res;
3643         }
3644         err = hpsa_wait_for_board_ready(h);
3645         if (err)
3646                 goto err_out_free_res;
3647         err = hpsa_find_cfgtables(h);
3648         if (err)
3649                 goto err_out_free_res;
3650         hpsa_find_board_params(h);
3651
3652         if (!hpsa_CISS_signature_present(h)) {
3653                 err = -ENODEV;
3654                 goto err_out_free_res;
3655         }
3656         hpsa_enable_scsi_prefetch(h);
3657         hpsa_p600_dma_prefetch_quirk(h);
3658         err = hpsa_enter_simple_mode(h);
3659         if (err)
3660                 goto err_out_free_res;
3661         return 0;
3662
3663 err_out_free_res:
3664         if (h->transtable)
3665                 iounmap(h->transtable);
3666         if (h->cfgtable)
3667                 iounmap(h->cfgtable);
3668         if (h->vaddr)
3669                 iounmap(h->vaddr);
3670         /*
3671          * Deliberately omit pci_disable_device(): it does something nasty to
3672          * Smart Array controllers that pci_enable_device does not undo
3673          */
3674         pci_release_regions(h->pdev);
3675         return err;
3676 }
3677
3678 static void __devinit hpsa_hba_inquiry(struct ctlr_info *h)
3679 {
3680         int rc;
3681
3682 #define HBA_INQUIRY_BYTE_COUNT 64
3683         h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
3684         if (!h->hba_inquiry_data)
3685                 return;
3686         rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
3687                 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
3688         if (rc != 0) {
3689                 kfree(h->hba_inquiry_data);
3690                 h->hba_inquiry_data = NULL;
3691         }
3692 }
3693
3694 static __devinit int hpsa_init_reset_devices(struct pci_dev *pdev)
3695 {
3696         int rc, i;
3697
3698         if (!reset_devices)
3699                 return 0;
3700
3701         /* Reset the controller with a PCI power-cycle or via doorbell */
3702         rc = hpsa_kdump_hard_reset_controller(pdev);
3703
3704         /* -ENOTSUPP here means we cannot reset the controller
3705          * but it's already (and still) up and running in
3706          * "performant mode".  Or, it might be 640x, which can't reset
3707          * due to concerns about shared bbwc between 6402/6404 pair.
3708          */
3709         if (rc == -ENOTSUPP)
3710                 return 0; /* just try to do the kdump anyhow. */
3711         if (rc)
3712                 return -ENODEV;
3713         if (hpsa_reset_msi(pdev))
3714                 return -ENODEV;
3715
3716         /* Now try to get the controller to respond to a no-op */
3717         for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
3718                 if (hpsa_noop(pdev) == 0)
3719                         break;
3720                 else
3721                         dev_warn(&pdev->dev, "no-op failed%s\n",
3722                                         (i < 11 ? "; re-trying" : ""));
3723         }
3724         return 0;
3725 }
3726
3727 static int __devinit hpsa_init_one(struct pci_dev *pdev,
3728                                     const struct pci_device_id *ent)
3729 {
3730         int dac, rc;
3731         struct ctlr_info *h;
3732
3733         if (number_of_controllers == 0)
3734                 printk(KERN_INFO DRIVER_NAME "\n");
3735
3736         rc = hpsa_init_reset_devices(pdev);
3737         if (rc)
3738                 return rc;
3739
3740         /* Command structures must be aligned on a 32-byte boundary because
3741          * the 5 lower bits of the address are used by the hardware. and by
3742          * the driver.  See comments in hpsa.h for more info.
3743          */
3744 #define COMMANDLIST_ALIGNMENT 32
3745         BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
3746         h = kzalloc(sizeof(*h), GFP_KERNEL);
3747         if (!h)
3748                 return -ENOMEM;
3749
3750         h->pdev = pdev;
3751         h->busy_initializing = 1;
3752         INIT_HLIST_HEAD(&h->cmpQ);
3753         INIT_HLIST_HEAD(&h->reqQ);
3754         rc = hpsa_pci_init(h);
3755         if (rc != 0)
3756                 goto clean1;
3757
3758         sprintf(h->devname, "hpsa%d", number_of_controllers);
3759         h->ctlr = number_of_controllers;
3760         number_of_controllers++;
3761
3762         /* configure PCI DMA stuff */
3763         rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3764         if (rc == 0) {
3765                 dac = 1;
3766         } else {
3767                 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3768                 if (rc == 0) {
3769                         dac = 0;
3770                 } else {
3771                         dev_err(&pdev->dev, "no suitable DMA available\n");
3772                         goto clean1;
3773                 }
3774         }
3775
3776         /* make sure the board interrupts are off */
3777         h->access.set_intr_mask(h, HPSA_INTR_OFF);
3778
3779         if (h->msix_vector || h->msi_vector)
3780                 rc = request_irq(h->intr[PERF_MODE_INT], do_hpsa_intr_msi,
3781                                 IRQF_DISABLED, h->devname, h);
3782         else
3783                 rc = request_irq(h->intr[PERF_MODE_INT], do_hpsa_intr_intx,
3784                                 IRQF_DISABLED, h->devname, h);
3785         if (rc) {
3786                 dev_err(&pdev->dev, "unable to get irq %d for %s\n",
3787                        h->intr[PERF_MODE_INT], h->devname);
3788                 goto clean2;
3789         }
3790
3791         dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
3792                h->devname, pdev->device,
3793                h->intr[PERF_MODE_INT], dac ? "" : " not");
3794
3795         h->cmd_pool_bits =
3796             kmalloc(((h->nr_cmds + BITS_PER_LONG -
3797                       1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
3798         h->cmd_pool = pci_alloc_consistent(h->pdev,
3799                     h->nr_cmds * sizeof(*h->cmd_pool),
3800                     &(h->cmd_pool_dhandle));
3801         h->errinfo_pool = pci_alloc_consistent(h->pdev,
3802                     h->nr_cmds * sizeof(*h->errinfo_pool),
3803                     &(h->errinfo_pool_dhandle));
3804         if ((h->cmd_pool_bits == NULL)
3805             || (h->cmd_pool == NULL)
3806             || (h->errinfo_pool == NULL)) {
3807                 dev_err(&pdev->dev, "out of memory");
3808                 rc = -ENOMEM;
3809                 goto clean4;
3810         }
3811         if (hpsa_allocate_sg_chain_blocks(h))
3812                 goto clean4;
3813         spin_lock_init(&h->lock);
3814         spin_lock_init(&h->scan_lock);
3815         init_waitqueue_head(&h->scan_wait_queue);
3816         h->scan_finished = 1; /* no scan currently in progress */
3817
3818         pci_set_drvdata(pdev, h);
3819         memset(h->cmd_pool_bits, 0,
3820                ((h->nr_cmds + BITS_PER_LONG -
3821                  1) / BITS_PER_LONG) * sizeof(unsigned long));
3822
3823         hpsa_scsi_setup(h);
3824
3825         /* Turn the interrupts on so we can service requests */
3826         h->access.set_intr_mask(h, HPSA_INTR_ON);
3827
3828         hpsa_put_ctlr_into_performant_mode(h);
3829         hpsa_hba_inquiry(h);
3830         hpsa_register_scsi(h);  /* hook ourselves into SCSI subsystem */
3831         h->busy_initializing = 0;
3832         return 1;
3833
3834 clean4:
3835         hpsa_free_sg_chain_blocks(h);
3836         kfree(h->cmd_pool_bits);
3837         if (h->cmd_pool)
3838                 pci_free_consistent(h->pdev,
3839                             h->nr_cmds * sizeof(struct CommandList),
3840                             h->cmd_pool, h->cmd_pool_dhandle);
3841         if (h->errinfo_pool)
3842                 pci_free_consistent(h->pdev,
3843                             h->nr_cmds * sizeof(struct ErrorInfo),
3844                             h->errinfo_pool,
3845                             h->errinfo_pool_dhandle);
3846         free_irq(h->intr[PERF_MODE_INT], h);
3847 clean2:
3848 clean1:
3849         h->busy_initializing = 0;
3850         kfree(h);
3851         return rc;
3852 }
3853
3854 static void hpsa_flush_cache(struct ctlr_info *h)
3855 {
3856         char *flush_buf;
3857         struct CommandList *c;
3858
3859         flush_buf = kzalloc(4, GFP_KERNEL);
3860         if (!flush_buf)
3861                 return;
3862
3863         c = cmd_special_alloc(h);
3864         if (!c) {
3865                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
3866                 goto out_of_memory;
3867         }
3868         fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
3869                 RAID_CTLR_LUNID, TYPE_CMD);
3870         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
3871         if (c->err_info->CommandStatus != 0)
3872                 dev_warn(&h->pdev->dev,
3873                         "error flushing cache on controller\n");
3874         cmd_special_free(h, c);
3875 out_of_memory:
3876         kfree(flush_buf);
3877 }
3878
3879 static void hpsa_shutdown(struct pci_dev *pdev)
3880 {
3881         struct ctlr_info *h;
3882
3883         h = pci_get_drvdata(pdev);
3884         /* Turn board interrupts off  and send the flush cache command
3885          * sendcmd will turn off interrupt, and send the flush...
3886          * To write all data in the battery backed cache to disks
3887          */
3888         hpsa_flush_cache(h);
3889         h->access.set_intr_mask(h, HPSA_INTR_OFF);
3890         free_irq(h->intr[PERF_MODE_INT], h);
3891 #ifdef CONFIG_PCI_MSI
3892         if (h->msix_vector)
3893                 pci_disable_msix(h->pdev);
3894         else if (h->msi_vector)
3895                 pci_disable_msi(h->pdev);
3896 #endif                          /* CONFIG_PCI_MSI */
3897 }
3898
3899 static void __devexit hpsa_remove_one(struct pci_dev *pdev)
3900 {
3901         struct ctlr_info *h;
3902
3903         if (pci_get_drvdata(pdev) == NULL) {
3904                 dev_err(&pdev->dev, "unable to remove device \n");
3905                 return;
3906         }
3907         h = pci_get_drvdata(pdev);
3908         hpsa_unregister_scsi(h);        /* unhook from SCSI subsystem */
3909         hpsa_shutdown(pdev);
3910         iounmap(h->vaddr);
3911         iounmap(h->transtable);
3912         iounmap(h->cfgtable);
3913         hpsa_free_sg_chain_blocks(h);
3914         pci_free_consistent(h->pdev,
3915                 h->nr_cmds * sizeof(struct CommandList),
3916                 h->cmd_pool, h->cmd_pool_dhandle);
3917         pci_free_consistent(h->pdev,
3918                 h->nr_cmds * sizeof(struct ErrorInfo),
3919                 h->errinfo_pool, h->errinfo_pool_dhandle);
3920         pci_free_consistent(h->pdev, h->reply_pool_size,
3921                 h->reply_pool, h->reply_pool_dhandle);
3922         kfree(h->cmd_pool_bits);
3923         kfree(h->blockFetchTable);
3924         kfree(h->hba_inquiry_data);
3925         /*
3926          * Deliberately omit pci_disable_device(): it does something nasty to
3927          * Smart Array controllers that pci_enable_device does not undo
3928          */
3929         pci_release_regions(pdev);
3930         pci_set_drvdata(pdev, NULL);
3931         kfree(h);
3932 }
3933
3934 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
3935         __attribute__((unused)) pm_message_t state)
3936 {
3937         return -ENOSYS;
3938 }
3939
3940 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
3941 {
3942         return -ENOSYS;
3943 }
3944
3945 static struct pci_driver hpsa_pci_driver = {
3946         .name = "hpsa",
3947         .probe = hpsa_init_one,
3948         .remove = __devexit_p(hpsa_remove_one),
3949         .id_table = hpsa_pci_device_id, /* id_table */
3950         .shutdown = hpsa_shutdown,
3951         .suspend = hpsa_suspend,
3952         .resume = hpsa_resume,
3953 };
3954
3955 /* Fill in bucket_map[], given nsgs (the max number of
3956  * scatter gather elements supported) and bucket[],
3957  * which is an array of 8 integers.  The bucket[] array
3958  * contains 8 different DMA transfer sizes (in 16
3959  * byte increments) which the controller uses to fetch
3960  * commands.  This function fills in bucket_map[], which
3961  * maps a given number of scatter gather elements to one of
3962  * the 8 DMA transfer sizes.  The point of it is to allow the
3963  * controller to only do as much DMA as needed to fetch the
3964  * command, with the DMA transfer size encoded in the lower
3965  * bits of the command address.
3966  */
3967 static void  calc_bucket_map(int bucket[], int num_buckets,
3968         int nsgs, int *bucket_map)
3969 {
3970         int i, j, b, size;
3971
3972         /* even a command with 0 SGs requires 4 blocks */
3973 #define MINIMUM_TRANSFER_BLOCKS 4
3974 #define NUM_BUCKETS 8
3975         /* Note, bucket_map must have nsgs+1 entries. */
3976         for (i = 0; i <= nsgs; i++) {
3977                 /* Compute size of a command with i SG entries */
3978                 size = i + MINIMUM_TRANSFER_BLOCKS;
3979                 b = num_buckets; /* Assume the biggest bucket */
3980                 /* Find the bucket that is just big enough */
3981                 for (j = 0; j < 8; j++) {
3982                         if (bucket[j] >= size) {
3983                                 b = j;
3984                                 break;
3985                         }
3986                 }
3987                 /* for a command with i SG entries, use bucket b. */
3988                 bucket_map[i] = b;
3989         }
3990 }
3991
3992 static __devinit void hpsa_enter_performant_mode(struct ctlr_info *h)
3993 {
3994         int i;
3995         unsigned long register_value;
3996
3997         /* This is a bit complicated.  There are 8 registers on
3998          * the controller which we write to to tell it 8 different
3999          * sizes of commands which there may be.  It's a way of
4000          * reducing the DMA done to fetch each command.  Encoded into
4001          * each command's tag are 3 bits which communicate to the controller
4002          * which of the eight sizes that command fits within.  The size of
4003          * each command depends on how many scatter gather entries there are.
4004          * Each SG entry requires 16 bytes.  The eight registers are programmed
4005          * with the number of 16-byte blocks a command of that size requires.
4006          * The smallest command possible requires 5 such 16 byte blocks.
4007          * the largest command possible requires MAXSGENTRIES + 4 16-byte
4008          * blocks.  Note, this only extends to the SG entries contained
4009          * within the command block, and does not extend to chained blocks
4010          * of SG elements.   bft[] contains the eight values we write to
4011          * the registers.  They are not evenly distributed, but have more
4012          * sizes for small commands, and fewer sizes for larger commands.
4013          */
4014         int bft[8] = {5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
4015         BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
4016         /*  5 = 1 s/g entry or 4k
4017          *  6 = 2 s/g entry or 8k
4018          *  8 = 4 s/g entry or 16k
4019          * 10 = 6 s/g entry or 24k
4020          */
4021
4022         h->reply_pool_wraparound = 1; /* spec: init to 1 */
4023
4024         /* Controller spec: zero out this buffer. */
4025         memset(h->reply_pool, 0, h->reply_pool_size);
4026         h->reply_pool_head = h->reply_pool;
4027
4028         bft[7] = h->max_sg_entries + 4;
4029         calc_bucket_map(bft, ARRAY_SIZE(bft), 32, h->blockFetchTable);
4030         for (i = 0; i < 8; i++)
4031                 writel(bft[i], &h->transtable->BlockFetch[i]);
4032
4033         /* size of controller ring buffer */
4034         writel(h->max_commands, &h->transtable->RepQSize);
4035         writel(1, &h->transtable->RepQCount);
4036         writel(0, &h->transtable->RepQCtrAddrLow32);
4037         writel(0, &h->transtable->RepQCtrAddrHigh32);
4038         writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
4039         writel(0, &h->transtable->RepQAddr0High32);
4040         writel(CFGTBL_Trans_Performant,
4041                 &(h->cfgtable->HostWrite.TransportRequest));
4042         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
4043         hpsa_wait_for_mode_change_ack(h);
4044         register_value = readl(&(h->cfgtable->TransportActive));
4045         if (!(register_value & CFGTBL_Trans_Performant)) {
4046                 dev_warn(&h->pdev->dev, "unable to get board into"
4047                                         " performant mode\n");
4048                 return;
4049         }
4050 }
4051
4052 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
4053 {
4054         u32 trans_support;
4055
4056         trans_support = readl(&(h->cfgtable->TransportSupport));
4057         if (!(trans_support & PERFORMANT_MODE))
4058                 return;
4059
4060         hpsa_get_max_perf_mode_cmds(h);
4061         h->max_sg_entries = 32;
4062         /* Performant mode ring buffer and supporting data structures */
4063         h->reply_pool_size = h->max_commands * sizeof(u64);
4064         h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size,
4065                                 &(h->reply_pool_dhandle));
4066
4067         /* Need a block fetch table for performant mode */
4068         h->blockFetchTable = kmalloc(((h->max_sg_entries+1) *
4069                                 sizeof(u32)), GFP_KERNEL);
4070
4071         if ((h->reply_pool == NULL)
4072                 || (h->blockFetchTable == NULL))
4073                 goto clean_up;
4074
4075         hpsa_enter_performant_mode(h);
4076
4077         /* Change the access methods to the performant access methods */
4078         h->access = SA5_performant_access;
4079         h->transMethod = CFGTBL_Trans_Performant;
4080
4081         return;
4082
4083 clean_up:
4084         if (h->reply_pool)
4085                 pci_free_consistent(h->pdev, h->reply_pool_size,
4086                         h->reply_pool, h->reply_pool_dhandle);
4087         kfree(h->blockFetchTable);
4088 }
4089
4090 /*
4091  *  This is it.  Register the PCI driver information for the cards we control
4092  *  the OS will call our registered routines when it finds one of our cards.
4093  */
4094 static int __init hpsa_init(void)
4095 {
4096         return pci_register_driver(&hpsa_pci_driver);
4097 }
4098
4099 static void __exit hpsa_cleanup(void)
4100 {
4101         pci_unregister_driver(&hpsa_pci_driver);
4102 }
4103
4104 module_init(hpsa_init);
4105 module_exit(hpsa_cleanup);