drivers/scsi/esas2r/esas2r_main.c

   1 /*
   2  *  linux/drivers/scsi/esas2r/esas2r_main.c
   3  *      For use with ATTO ExpressSAS R6xx SAS/SATA RAID controllers
   4  *
   5  *  Copyright (c) 2001-2013 ATTO Technology, Inc.
   6  *  (mailto:linuxdrivers@attotech.com)
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * NO WARRANTY
  19  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  20  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  21  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  22  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  23  * solely responsible for determining the appropriateness of using and
  24  * distributing the Program and assumes all risks associated with its
  25  * exercise of rights under this Agreement, including but not limited to
  26  * the risks and costs of program errors, damage to or loss of data,
  27  * programs or equipment, and unavailability or interruption of operations.
  28  *
  29  * DISCLAIMER OF LIABILITY
  30  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  31  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  33  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  35  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  36  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  37  *
  38  * You should have received a copy of the GNU General Public License
  39  * along with this program; if not, write to the Free Software
  40  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  41  * USA.
  42  */
  43
  44 #include "esas2r.h"
  45
  46 MODULE_DESCRIPTION(ESAS2R_DRVR_NAME ": " ESAS2R_LONGNAME " driver");
  47 MODULE_AUTHOR("ATTO Technology, Inc.");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(ESAS2R_VERSION_STR);
  50
  51 /* global definitions */
  52
  53 static int found_adapters;
  54 struct esas2r_adapter *esas2r_adapters[MAX_ADAPTERS];
  55
  56 #define ESAS2R_VDA_EVENT_PORT1       54414
  57 #define ESAS2R_VDA_EVENT_PORT2       54415
  58 #define ESAS2R_VDA_EVENT_SOCK_COUNT  2
  59
  60 static struct esas2r_adapter *esas2r_adapter_from_kobj(struct kobject *kobj)
  61 {
  62         struct device *dev = container_of(kobj, struct device, kobj);
  63         struct Scsi_Host *host = class_to_shost(dev);
  64
  65         return (struct esas2r_adapter *)host->hostdata;
  66 }
  67
  68 static ssize_t read_fw(struct file *file, struct kobject *kobj,
  69                        struct bin_attribute *attr,
  70                        char *buf, loff_t off, size_t count)
  71 {
  72         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
  73
  74         return esas2r_read_fw(a, buf, off, count);
  75 }
  76
  77 static ssize_t write_fw(struct file *file, struct kobject *kobj,
  78                         struct bin_attribute *attr,
  79                         char *buf, loff_t off, size_t count)
  80 {
  81         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
  82
  83         return esas2r_write_fw(a, buf, off, count);
  84 }
  85
  86 static ssize_t read_fs(struct file *file, struct kobject *kobj,
  87                        struct bin_attribute *attr,
  88                        char *buf, loff_t off, size_t count)
  89 {
  90         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
  91
  92         return esas2r_read_fs(a, buf, off, count);
  93 }
  94
  95 static ssize_t write_fs(struct file *file, struct kobject *kobj,
  96                         struct bin_attribute *attr,
  97                         char *buf, loff_t off, size_t count)
  98 {
  99         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 100         int length = min(sizeof(struct esas2r_ioctl_fs), count);
 101         int result = 0;
 102
 103         result = esas2r_write_fs(a, buf, off, count);
 104
 105         if (result < 0)
 106                 result = 0;
 107
 108         return length;
 109 }
 110
 111 static ssize_t read_vda(struct file *file, struct kobject *kobj,
 112                         struct bin_attribute *attr,
 113                         char *buf, loff_t off, size_t count)
 114 {
 115         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 116
 117         return esas2r_read_vda(a, buf, off, count);
 118 }
 119
 120 static ssize_t write_vda(struct file *file, struct kobject *kobj,
 121                          struct bin_attribute *attr,
 122                          char *buf, loff_t off, size_t count)
 123 {
 124         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 125
 126         return esas2r_write_vda(a, buf, off, count);
 127 }
 128
 129 static ssize_t read_live_nvram(struct file *file, struct kobject *kobj,
 130                                struct bin_attribute *attr,
 131                                char *buf, loff_t off, size_t count)
 132 {
 133         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 134         int length = min_t(size_t, sizeof(struct esas2r_sas_nvram), PAGE_SIZE);
 135
 136         memcpy(buf, a->nvram, length);
 137         return length;
 138 }
 139
 140 static ssize_t write_live_nvram(struct file *file, struct kobject *kobj,
 141                                 struct bin_attribute *attr,
 142                                 char *buf, loff_t off, size_t count)
 143 {
 144         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 145         struct esas2r_request *rq;
 146         int result = -EFAULT;
 147
 148         rq = esas2r_alloc_request(a);
 149         if (rq == NULL)
 150                 return -ENOMEM;
 151
 152         if (esas2r_write_params(a, rq, (struct esas2r_sas_nvram *)buf))
 153                 result = count;
 154
 155         esas2r_free_request(a, rq);
 156
 157         return result;
 158 }
 159
 160 static ssize_t read_default_nvram(struct file *file, struct kobject *kobj,
 161                                   struct bin_attribute *attr,
 162                                   char *buf, loff_t off, size_t count)
 163 {
 164         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 165
 166         esas2r_nvram_get_defaults(a, (struct esas2r_sas_nvram *)buf);
 167
 168         return sizeof(struct esas2r_sas_nvram);
 169 }
 170
 171 static ssize_t read_hw(struct file *file, struct kobject *kobj,
 172                        struct bin_attribute *attr,
 173                        char *buf, loff_t off, size_t count)
 174 {
 175         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 176         int length = min_t(size_t, sizeof(struct atto_ioctl), PAGE_SIZE);
 177
 178         if (!a->local_atto_ioctl)
 179                 return -ENOMEM;
 180
 181         if (handle_hba_ioctl(a, a->local_atto_ioctl) != IOCTL_SUCCESS)
 182                 return -ENOMEM;
 183
 184         memcpy(buf, a->local_atto_ioctl, length);
 185
 186         return length;
 187 }
 188
 189 static ssize_t write_hw(struct file *file, struct kobject *kobj,
 190                         struct bin_attribute *attr,
 191                         char *buf, loff_t off, size_t count)
 192 {
 193         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 194         int length = min(sizeof(struct atto_ioctl), count);
 195
 196         if (!a->local_atto_ioctl) {
 197                 a->local_atto_ioctl = kzalloc(sizeof(struct atto_ioctl),
 198                                               GFP_KERNEL);
 199                 if (a->local_atto_ioctl == NULL) {
 200                         esas2r_log(ESAS2R_LOG_WARN,
 201                                    "write_hw kzalloc failed for %d bytes",
 202                                    sizeof(struct atto_ioctl));
 203                         return -ENOMEM;
 204                 }
 205         }
 206
 207         memset(a->local_atto_ioctl, 0, sizeof(struct atto_ioctl));
 208         memcpy(a->local_atto_ioctl, buf, length);
 209
 210         return length;
 211 }
 212
 213 #define ESAS2R_RW_BIN_ATTR(_name) \
 214         struct bin_attribute bin_attr_ ## _name = { \
 215                 .attr   = \
 216                 { .name = __stringify(_name), .mode  = S_IRUSR | S_IWUSR }, \
 217                 .size   = 0, \
 218                 .read   = read_ ## _name, \
 219                 .write  = write_ ## _name }
 220
 221 ESAS2R_RW_BIN_ATTR(fw);
 222 ESAS2R_RW_BIN_ATTR(fs);
 223 ESAS2R_RW_BIN_ATTR(vda);
 224 ESAS2R_RW_BIN_ATTR(hw);
 225 ESAS2R_RW_BIN_ATTR(live_nvram);
 226
 227 struct bin_attribute bin_attr_default_nvram = {
 228         .attr   = { .name = "default_nvram", .mode = S_IRUGO },
 229         .size   = 0,
 230         .read   = read_default_nvram,
 231         .write  = NULL
 232 };
 233
 234 static struct scsi_host_template driver_template = {
 235         .module                         = THIS_MODULE,
 236         .show_info                      = esas2r_show_info,
 237         .name                           = ESAS2R_LONGNAME,
 238         .release                        = esas2r_release,
 239         .info                           = esas2r_info,
 240         .ioctl                          = esas2r_ioctl,
 241         .queuecommand                   = esas2r_queuecommand,
 242         .eh_abort_handler               = esas2r_eh_abort,
 243         .eh_device_reset_handler        = esas2r_device_reset,
 244         .eh_bus_reset_handler           = esas2r_bus_reset,
 245         .eh_host_reset_handler          = esas2r_host_reset,
 246         .eh_target_reset_handler        = esas2r_target_reset,
 247         .can_queue                      = 128,
 248         .this_id                        = -1,
 249         .sg_tablesize                   = SCSI_MAX_SG_SEGMENTS,
 250         .cmd_per_lun                    =
 251                 ESAS2R_DEFAULT_CMD_PER_LUN,
 252         .present                        = 0,
 253         .unchecked_isa_dma              = 0,
 254         .use_clustering                 = ENABLE_CLUSTERING,
 255         .emulated                       = 0,
 256         .proc_name                      = ESAS2R_DRVR_NAME,
 257         .change_queue_depth             = scsi_change_queue_depth,
 258         .change_queue_type              = scsi_change_queue_type,
 259         .max_sectors                    = 0xFFFF,
 260         .use_blk_tags                   = 1,
 261 };
 262
 263 int sgl_page_size = 512;
 264 module_param(sgl_page_size, int, 0);
 265 MODULE_PARM_DESC(sgl_page_size,
 266                  "Scatter/gather list (SGL) page size in number of S/G "
 267                  "entries.  If your application is doing a lot of very large "
 268                  "transfers, you may want to increase the SGL page size.  "
 269                  "Default 512.");
 270
 271 int num_sg_lists = 1024;
 272 module_param(num_sg_lists, int, 0);
 273 MODULE_PARM_DESC(num_sg_lists,
 274                  "Number of scatter/gather lists.  Default 1024.");
 275
 276 int sg_tablesize = SCSI_MAX_SG_SEGMENTS;
 277 module_param(sg_tablesize, int, 0);
 278 MODULE_PARM_DESC(sg_tablesize,
 279                  "Maximum number of entries in a scatter/gather table.");
 280
 281 int num_requests = 256;
 282 module_param(num_requests, int, 0);
 283 MODULE_PARM_DESC(num_requests,
 284                  "Number of requests.  Default 256.");
 285
 286 int num_ae_requests = 4;
 287 module_param(num_ae_requests, int, 0);
 288 MODULE_PARM_DESC(num_ae_requests,
 289                  "Number of VDA asynchromous event requests.  Default 4.");
 290
 291 int cmd_per_lun = ESAS2R_DEFAULT_CMD_PER_LUN;
 292 module_param(cmd_per_lun, int, 0);
 293 MODULE_PARM_DESC(cmd_per_lun,
 294                  "Maximum number of commands per LUN.  Default "
 295                  DEFINED_NUM_TO_STR(ESAS2R_DEFAULT_CMD_PER_LUN) ".");
 296
 297 int can_queue = 128;
 298 module_param(can_queue, int, 0);
 299 MODULE_PARM_DESC(can_queue,
 300                  "Maximum number of commands per adapter.  Default 128.");
 301
 302 int esas2r_max_sectors = 0xFFFF;
 303 module_param(esas2r_max_sectors, int, 0);
 304 MODULE_PARM_DESC(esas2r_max_sectors,
 305                  "Maximum number of disk sectors in a single data transfer.  "
 306                  "Default 65535 (largest possible setting).");
 307
 308 int interrupt_mode = 1;
 309 module_param(interrupt_mode, int, 0);
 310 MODULE_PARM_DESC(interrupt_mode,
 311                  "Defines the interrupt mode to use.  0 for legacy"
 312                  ", 1 for MSI.  Default is MSI (1).");
 313
 314 static struct pci_device_id
 315         esas2r_pci_table[] = {
 316         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x0049,
 317           0,
 318           0, 0 },
 319         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004A,
 320           0,
 321           0, 0 },
 322         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004B,
 323           0,
 324           0, 0 },
 325         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004C,
 326           0,
 327           0, 0 },
 328         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004D,
 329           0,
 330           0, 0 },
 331         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004E,
 332           0,
 333           0, 0 },
 334         { 0,              0,              0,              0,
 335           0,
 336           0, 0 }
 337 };
 338
 339 MODULE_DEVICE_TABLE(pci, esas2r_pci_table);
 340
 341 static int
 342 esas2r_probe(struct pci_dev *pcid, const struct pci_device_id *id);
 343
 344 static void
 345 esas2r_remove(struct pci_dev *pcid);
 346
 347 static struct pci_driver
 348         esas2r_pci_driver = {
 349         .name           = ESAS2R_DRVR_NAME,
 350         .id_table       = esas2r_pci_table,
 351         .probe          = esas2r_probe,
 352         .remove         = esas2r_remove,
 353         .suspend        = esas2r_suspend,
 354         .resume         = esas2r_resume,
 355 };
 356
 357 static int esas2r_probe(struct pci_dev *pcid,
 358                         const struct pci_device_id *id)
 359 {
 360         struct Scsi_Host *host = NULL;
 361         struct esas2r_adapter *a;
 362         int err;
 363
 364         size_t host_alloc_size = sizeof(struct esas2r_adapter)
 365                                  + ((num_requests) +
 366                                     1) * sizeof(struct esas2r_request);
 367
 368         esas2r_log_dev(ESAS2R_LOG_DEBG, &(pcid->dev),
 369                        "esas2r_probe() 0x%02x 0x%02x 0x%02x 0x%02x",
 370                        pcid->vendor,
 371                        pcid->device,
 372                        pcid->subsystem_vendor,
 373                        pcid->subsystem_device);
 374
 375         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 376                        "before pci_enable_device() "
 377                        "enable_cnt: %d",
 378                        pcid->enable_cnt.counter);
 379
 380         err = pci_enable_device(pcid);
 381         if (err != 0) {
 382                 esas2r_log_dev(ESAS2R_LOG_CRIT, &(pcid->dev),
 383                                "pci_enable_device() FAIL (%d)",
 384                                err);
 385                 return -ENODEV;
 386         }
 387
 388         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 389                        "pci_enable_device() OK");
 390         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 391                        "after pci_enable_device() enable_cnt: %d",
 392                        pcid->enable_cnt.counter);
 393
 394         host = scsi_host_alloc(&driver_template, host_alloc_size);
 395         if (host == NULL) {
 396                 esas2r_log(ESAS2R_LOG_CRIT, "scsi_host_alloc() FAIL");
 397                 return -ENODEV;
 398         }
 399
 400         memset(host->hostdata, 0, host_alloc_size);
 401
 402         a = (struct esas2r_adapter *)host->hostdata;
 403
 404         esas2r_log(ESAS2R_LOG_INFO, "scsi_host_alloc() OK host: %p", host);
 405
 406         /* override max LUN and max target id */
 407
 408         host->max_id = ESAS2R_MAX_ID + 1;
 409         host->max_lun = 255;
 410
 411         /* we can handle 16-byte CDbs */
 412
 413         host->max_cmd_len = 16;
 414
 415         host->can_queue = can_queue;
 416         host->cmd_per_lun = cmd_per_lun;
 417         host->this_id = host->max_id + 1;
 418         host->max_channel = 0;
 419         host->unique_id = found_adapters;
 420         host->sg_tablesize = sg_tablesize;
 421         host->max_sectors = esas2r_max_sectors;
 422
 423         /* set to bus master for BIOses that don't do it for us */
 424
 425         esas2r_log(ESAS2R_LOG_INFO, "pci_set_master() called");
 426
 427         pci_set_master(pcid);
 428
 429         if (!esas2r_init_adapter(host, pcid, found_adapters)) {
 430                 esas2r_log(ESAS2R_LOG_CRIT,
 431                            "unable to initialize device at PCI bus %x:%x",
 432                            pcid->bus->number,
 433                            pcid->devfn);
 434
 435                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 436                                "scsi_host_put() called");
 437
 438                 scsi_host_put(host);
 439
 440                 return 0;
 441
 442         }
 443
 444         esas2r_log(ESAS2R_LOG_INFO, "pci_set_drvdata(%p, %p) called", pcid,
 445                    host->hostdata);
 446
 447         pci_set_drvdata(pcid, host);
 448
 449         esas2r_log(ESAS2R_LOG_INFO, "scsi_add_host() called");
 450
 451         err = scsi_add_host(host, &pcid->dev);
 452
 453         if (err) {
 454                 esas2r_log(ESAS2R_LOG_CRIT, "scsi_add_host returned %d", err);
 455                 esas2r_log_dev(ESAS2R_LOG_CRIT, &(host->shost_gendev),
 456                                "scsi_add_host() FAIL");
 457
 458                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 459                                "scsi_host_put() called");
 460
 461                 scsi_host_put(host);
 462
 463                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 464                                "pci_set_drvdata(%p, NULL) called",
 465                                pcid);
 466
 467                 pci_set_drvdata(pcid, NULL);
 468
 469                 return -ENODEV;
 470         }
 471
 472
 473         esas2r_fw_event_on(a);
 474
 475         esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 476                        "scsi_scan_host() called");
 477
 478         scsi_scan_host(host);
 479
 480         /* Add sysfs binary files */
 481         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fw))
 482                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 483                                "Failed to create sysfs binary file: fw");
 484         else
 485                 a->sysfs_fw_created = 1;
 486
 487         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fs))
 488                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 489                                "Failed to create sysfs binary file: fs");
 490         else
 491                 a->sysfs_fs_created = 1;
 492
 493         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_vda))
 494                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 495                                "Failed to create sysfs binary file: vda");
 496         else
 497                 a->sysfs_vda_created = 1;
 498
 499         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_hw))
 500                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 501                                "Failed to create sysfs binary file: hw");
 502         else
 503                 a->sysfs_hw_created = 1;
 504
 505         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_live_nvram))
 506                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 507                                "Failed to create sysfs binary file: live_nvram");
 508         else
 509                 a->sysfs_live_nvram_created = 1;
 510
 511         if (sysfs_create_bin_file(&host->shost_dev.kobj,
 512                                   &bin_attr_default_nvram))
 513                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 514                                "Failed to create sysfs binary file: default_nvram");
 515         else
 516                 a->sysfs_default_nvram_created = 1;
 517
 518         found_adapters++;
 519
 520         return 0;
 521 }
 522
 523 static void esas2r_remove(struct pci_dev *pdev)
 524 {
 525         struct Scsi_Host *host;
 526         int index;
 527
 528         if (pdev == NULL) {
 529                 esas2r_log(ESAS2R_LOG_WARN, "esas2r_remove pdev==NULL");
 530                 return;
 531         }
 532
 533         host = pci_get_drvdata(pdev);
 534
 535         if (host == NULL) {
 536                 /*
 537                  * this can happen if pci_set_drvdata was already called
 538                  * to clear the host pointer.  if this is the case, we
 539                  * are okay; this channel has already been cleaned up.
 540                  */
 541
 542                 return;
 543         }
 544
 545         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 546                        "esas2r_remove(%p) called; "
 547                        "host:%p", pdev,
 548                        host);
 549
 550         index = esas2r_cleanup(host);
 551
 552         if (index < 0)
 553                 esas2r_log_dev(ESAS2R_LOG_WARN, &(pdev->dev),
 554                                "unknown host in %s",
 555                                __func__);
 556
 557         found_adapters--;
 558
 559         /* if this was the last adapter, clean up the rest of the driver */
 560
 561         if (found_adapters == 0)
 562                 esas2r_cleanup(NULL);
 563 }
 564
 565 static int __init esas2r_init(void)
 566 {
 567         int i;
 568
 569         esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
 570
 571         /* verify valid parameters */
 572
 573         if (can_queue < 1) {
 574                 esas2r_log(ESAS2R_LOG_WARN,
 575                            "warning: can_queue must be at least 1, value "
 576                            "forced.");
 577                 can_queue = 1;
 578         } else if (can_queue > 2048) {
 579                 esas2r_log(ESAS2R_LOG_WARN,
 580                            "warning: can_queue must be no larger than 2048, "
 581                            "value forced.");
 582                 can_queue = 2048;
 583         }
 584
 585         if (cmd_per_lun < 1) {
 586                 esas2r_log(ESAS2R_LOG_WARN,
 587                            "warning: cmd_per_lun must be at least 1, value "
 588                            "forced.");
 589                 cmd_per_lun = 1;
 590         } else if (cmd_per_lun > 2048) {
 591                 esas2r_log(ESAS2R_LOG_WARN,
 592                            "warning: cmd_per_lun must be no larger than "
 593                            "2048, value forced.");
 594                 cmd_per_lun = 2048;
 595         }
 596
 597         if (sg_tablesize < 32) {
 598                 esas2r_log(ESAS2R_LOG_WARN,
 599                            "warning: sg_tablesize must be at least 32, "
 600                            "value forced.");
 601                 sg_tablesize = 32;
 602         }
 603
 604         if (esas2r_max_sectors < 1) {
 605                 esas2r_log(ESAS2R_LOG_WARN,
 606                            "warning: esas2r_max_sectors must be at least "
 607                            "1, value forced.");
 608                 esas2r_max_sectors = 1;
 609         } else if (esas2r_max_sectors > 0xffff) {
 610                 esas2r_log(ESAS2R_LOG_WARN,
 611                            "warning: esas2r_max_sectors must be no larger "
 612                            "than 0xffff, value forced.");
 613                 esas2r_max_sectors = 0xffff;
 614         }
 615
 616         sgl_page_size &= ~(ESAS2R_SGL_ALIGN - 1);
 617
 618         if (sgl_page_size < SGL_PG_SZ_MIN)
 619                 sgl_page_size = SGL_PG_SZ_MIN;
 620         else if (sgl_page_size > SGL_PG_SZ_MAX)
 621                 sgl_page_size = SGL_PG_SZ_MAX;
 622
 623         if (num_sg_lists < NUM_SGL_MIN)
 624                 num_sg_lists = NUM_SGL_MIN;
 625         else if (num_sg_lists > NUM_SGL_MAX)
 626                 num_sg_lists = NUM_SGL_MAX;
 627
 628         if (num_requests < NUM_REQ_MIN)
 629                 num_requests = NUM_REQ_MIN;
 630         else if (num_requests > NUM_REQ_MAX)
 631                 num_requests = NUM_REQ_MAX;
 632
 633         if (num_ae_requests < NUM_AE_MIN)
 634                 num_ae_requests = NUM_AE_MIN;
 635         else if (num_ae_requests > NUM_AE_MAX)
 636                 num_ae_requests = NUM_AE_MAX;
 637
 638         /* set up other globals */
 639
 640         for (i = 0; i < MAX_ADAPTERS; i++)
 641                 esas2r_adapters[i] = NULL;
 642
 643         /* initialize */
 644
 645         driver_template.module = THIS_MODULE;
 646
 647         if (pci_register_driver(&esas2r_pci_driver) != 0)
 648                 esas2r_log(ESAS2R_LOG_CRIT, "pci_register_driver FAILED");
 649         else
 650                 esas2r_log(ESAS2R_LOG_INFO, "pci_register_driver() OK");
 651
 652         if (!found_adapters) {
 653                 pci_unregister_driver(&esas2r_pci_driver);
 654                 esas2r_cleanup(NULL);
 655
 656                 esas2r_log(ESAS2R_LOG_CRIT,
 657                            "driver will not be loaded because no ATTO "
 658                            "%s devices were found",
 659                            ESAS2R_DRVR_NAME);
 660                 return -1;
 661         } else {
 662                 esas2r_log(ESAS2R_LOG_INFO, "found %d adapters",
 663                            found_adapters);
 664         }
 665
 666         return 0;
 667 }
 668
 669 /* Handle ioctl calls to "/proc/scsi/esas2r/ATTOnode" */
 670 static const struct file_operations esas2r_proc_fops = {
 671         .compat_ioctl   = esas2r_proc_ioctl,
 672         .unlocked_ioctl = esas2r_proc_ioctl,
 673 };
 674
 675 static struct Scsi_Host *esas2r_proc_host;
 676 static int esas2r_proc_major;
 677
 678 long esas2r_proc_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
 679 {
 680         return esas2r_ioctl_handler(esas2r_proc_host->hostdata,
 681                                     (int)cmd, (void __user *)arg);
 682 }
 683
 684 static void __exit esas2r_exit(void)
 685 {
 686         esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
 687
 688         if (esas2r_proc_major > 0) {
 689                 esas2r_log(ESAS2R_LOG_INFO, "unregister proc");
 690
 691                 remove_proc_entry(ATTONODE_NAME,
 692                                   esas2r_proc_host->hostt->proc_dir);
 693                 unregister_chrdev(esas2r_proc_major, ESAS2R_DRVR_NAME);
 694
 695                 esas2r_proc_major = 0;
 696         }
 697
 698         esas2r_log(ESAS2R_LOG_INFO, "pci_unregister_driver() called");
 699
 700         pci_unregister_driver(&esas2r_pci_driver);
 701 }
 702
 703 int esas2r_show_info(struct seq_file *m, struct Scsi_Host *sh)
 704 {
 705         struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
 706
 707         struct esas2r_target *t;
 708         int dev_count = 0;
 709
 710         esas2r_log(ESAS2R_LOG_DEBG, "esas2r_show_info (%p,%d)", m, sh->host_no);
 711
 712         seq_printf(m, ESAS2R_LONGNAME "\n"
 713                    "Driver version: "ESAS2R_VERSION_STR "\n"
 714                    "Flash version: %s\n"
 715                    "Firmware version: %s\n"
 716                    "Copyright "ESAS2R_COPYRIGHT_YEARS "\n"
 717                    "http://www.attotech.com\n"
 718                    "\n",
 719                    a->flash_rev,
 720                    a->fw_rev[0] ? a->fw_rev : "(none)");
 721
 722
 723         seq_printf(m, "Adapter information:\n"
 724                    "--------------------\n"
 725                    "Model: %s\n"
 726                    "SAS address: %02X%02X%02X%02X:%02X%02X%02X%02X\n",
 727                    esas2r_get_model_name(a),
 728                    a->nvram->sas_addr[0],
 729                    a->nvram->sas_addr[1],
 730                    a->nvram->sas_addr[2],
 731                    a->nvram->sas_addr[3],
 732                    a->nvram->sas_addr[4],
 733                    a->nvram->sas_addr[5],
 734                    a->nvram->sas_addr[6],
 735                    a->nvram->sas_addr[7]);
 736
 737         seq_puts(m, "\n"
 738                    "Discovered devices:\n"
 739                    "\n"
 740                    "   #  Target ID\n"
 741                    "---------------\n");
 742
 743         for (t = a->targetdb; t < a->targetdb_end; t++)
 744                 if (t->buffered_target_state == TS_PRESENT) {
 745                         seq_printf(m, " %3d   %3d\n",
 746                                    ++dev_count,
 747                                    (u16)(uintptr_t)(t - a->targetdb));
 748                 }
 749
 750         if (dev_count == 0)
 751                 seq_puts(m, "none\n");
 752
 753         seq_puts(m, "\n");
 754         return 0;
 755
 756 }
 757
 758 int esas2r_release(struct Scsi_Host *sh)
 759 {
 760         esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
 761                        "esas2r_release() called");
 762
 763         esas2r_cleanup(sh);
 764         if (sh->irq)
 765                 free_irq(sh->irq, NULL);
 766         scsi_unregister(sh);
 767         return 0;
 768 }
 769
 770 const char *esas2r_info(struct Scsi_Host *sh)
 771 {
 772         struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
 773         static char esas2r_info_str[512];
 774
 775         esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
 776                        "esas2r_info() called");
 777
 778         /*
 779          * if we haven't done so already, register as a char driver
 780          * and stick a node under "/proc/scsi/esas2r/ATTOnode"
 781          */
 782
 783         if (esas2r_proc_major <= 0) {
 784                 esas2r_proc_host = sh;
 785
 786                 esas2r_proc_major = register_chrdev(0, ESAS2R_DRVR_NAME,
 787                                                     &esas2r_proc_fops);
 788
 789                 esas2r_log_dev(ESAS2R_LOG_DEBG, &(sh->shost_gendev),
 790                                "register_chrdev (major %d)",
 791                                esas2r_proc_major);
 792
 793                 if (esas2r_proc_major > 0) {
 794                         struct proc_dir_entry *pde;
 795
 796                         pde = proc_create(ATTONODE_NAME, 0,
 797                                           sh->hostt->proc_dir,
 798                                           &esas2r_proc_fops);
 799
 800                         if (!pde) {
 801                                 esas2r_log_dev(ESAS2R_LOG_WARN,
 802                                                &(sh->shost_gendev),
 803                                                "failed to create_proc_entry");
 804                                 esas2r_proc_major = -1;
 805                         }
 806                 }
 807         }
 808
 809         sprintf(esas2r_info_str,
 810                 ESAS2R_LONGNAME " (bus 0x%02X, device 0x%02X, IRQ 0x%02X)"
 811                 " driver version: "ESAS2R_VERSION_STR "  firmware version: "
 812                 "%s\n",
 813                 a->pcid->bus->number, a->pcid->devfn, a->pcid->irq,
 814                 a->fw_rev[0] ? a->fw_rev : "(none)");
 815
 816         return esas2r_info_str;
 817 }
 818
 819 /* Callback for building a request scatter/gather list */
 820 static u32 get_physaddr_from_sgc(struct esas2r_sg_context *sgc, u64 *addr)
 821 {
 822         u32 len;
 823
 824         if (likely(sgc->cur_offset == sgc->exp_offset)) {
 825                 /*
 826                  * the normal case: caller used all bytes from previous call, so
 827                  * expected offset is the same as the current offset.
 828                  */
 829
 830                 if (sgc->sgel_count < sgc->num_sgel) {
 831                         /* retrieve next segment, except for first time */
 832                         if (sgc->exp_offset > (u8 *)0) {
 833                                 /* advance current segment */
 834                                 sgc->cur_sgel = sg_next(sgc->cur_sgel);
 835                                 ++(sgc->sgel_count);
 836                         }
 837
 838
 839                         len = sg_dma_len(sgc->cur_sgel);
 840                         (*addr) = sg_dma_address(sgc->cur_sgel);
 841
 842                         /* save the total # bytes returned to caller so far */
 843                         sgc->exp_offset += len;
 844
 845                 } else {
 846                         len = 0;
 847                 }
 848         } else if (sgc->cur_offset < sgc->exp_offset) {
 849                 /*
 850                  * caller did not use all bytes from previous call. need to
 851                  * compute the address based on current segment.
 852                  */
 853
 854                 len = sg_dma_len(sgc->cur_sgel);
 855                 (*addr) = sg_dma_address(sgc->cur_sgel);
 856
 857                 sgc->exp_offset -= len;
 858
 859                 /* calculate PA based on prev segment address and offsets */
 860                 *addr = *addr +
 861                         (sgc->cur_offset - sgc->exp_offset);
 862
 863                 sgc->exp_offset += len;
 864
 865                 /* re-calculate length based on offset */
 866                 len = lower_32_bits(
 867                         sgc->exp_offset - sgc->cur_offset);
 868         } else {   /* if ( sgc->cur_offset > sgc->exp_offset ) */
 869                    /*
 870                     * we don't expect the caller to skip ahead.
 871                     * cur_offset will never exceed the len we return
 872                     */
 873                 len = 0;
 874         }
 875
 876         return len;
 877 }
 878
 879 int esas2r_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 880 {
 881         struct esas2r_adapter *a =
 882                 (struct esas2r_adapter *)cmd->device->host->hostdata;
 883         struct esas2r_request *rq;
 884         struct esas2r_sg_context sgc;
 885         unsigned bufflen;
 886
 887         /* Assume success, if it fails we will fix the result later. */
 888         cmd->result = DID_OK << 16;
 889
 890         if (unlikely(test_bit(AF_DEGRADED_MODE, &a->flags))) {
 891                 cmd->result = DID_NO_CONNECT << 16;
 892                 cmd->scsi_done(cmd);
 893                 return 0;
 894         }
 895
 896         rq = esas2r_alloc_request(a);
 897         if (unlikely(rq == NULL)) {
 898                 esas2r_debug("esas2r_alloc_request failed");
 899                 return SCSI_MLQUEUE_HOST_BUSY;
 900         }
 901
 902         rq->cmd = cmd;
 903         bufflen = scsi_bufflen(cmd);
 904
 905         if (likely(bufflen != 0)) {
 906                 if (cmd->sc_data_direction == DMA_TO_DEVICE)
 907                         rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_WRD);
 908                 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
 909                         rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_RDD);
 910         }
 911
 912         memcpy(rq->vrq->scsi.cdb, cmd->cmnd, cmd->cmd_len);
 913         rq->vrq->scsi.length = cpu_to_le32(bufflen);
 914         rq->target_id = cmd->device->id;
 915         rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
 916         rq->sense_buf = cmd->sense_buffer;
 917         rq->sense_len = SCSI_SENSE_BUFFERSIZE;
 918
 919         esas2r_sgc_init(&sgc, a, rq, NULL);
 920
 921         sgc.length = bufflen;
 922         sgc.cur_offset = NULL;
 923
 924         sgc.cur_sgel = scsi_sglist(cmd);
 925         sgc.exp_offset = NULL;
 926         sgc.num_sgel = scsi_dma_map(cmd);
 927         sgc.sgel_count = 0;
 928
 929         if (unlikely(sgc.num_sgel < 0)) {
 930                 esas2r_free_request(a, rq);
 931                 return SCSI_MLQUEUE_HOST_BUSY;
 932         }
 933
 934         sgc.get_phys_addr = (PGETPHYSADDR)get_physaddr_from_sgc;
 935
 936         if (unlikely(!esas2r_build_sg_list(a, rq, &sgc))) {
 937                 scsi_dma_unmap(cmd);
 938                 esas2r_free_request(a, rq);
 939                 return SCSI_MLQUEUE_HOST_BUSY;
 940         }
 941
 942         esas2r_debug("start request %p to %d:%d\n", rq, (int)cmd->device->id,
 943                      (int)cmd->device->lun);
 944
 945         esas2r_start_request(a, rq);
 946
 947         return 0;
 948 }
 949
 950 static void complete_task_management_request(struct esas2r_adapter *a,
 951                                              struct esas2r_request *rq)
 952 {
 953         (*rq->task_management_status_ptr) = rq->req_stat;
 954         esas2r_free_request(a, rq);
 955 }
 956
 957 /**
 958  * Searches the specified queue for the specified queue for the command
 959  * to abort.
 960  *
 961  * @param [in] a
 962  * @param [in] abort_request
 963  * @param [in] cmd
 964  * t
 965  * @return 0 on failure, 1 if command was not found, 2 if command was found
 966  */
 967 static int esas2r_check_active_queue(struct esas2r_adapter *a,
 968                                      struct esas2r_request **abort_request,
 969                                      struct scsi_cmnd *cmd,
 970                                      struct list_head *queue)
 971 {
 972         bool found = false;
 973         struct esas2r_request *ar = *abort_request;
 974         struct esas2r_request *rq;
 975         struct list_head *element, *next;
 976
 977         list_for_each_safe(element, next, queue) {
 978
 979                 rq = list_entry(element, struct esas2r_request, req_list);
 980
 981                 if (rq->cmd == cmd) {
 982
 983                         /* Found the request.  See what to do with it. */
 984                         if (queue == &a->active_list) {
 985                                 /*
 986                                  * We are searching the active queue, which
 987                                  * means that we need to send an abort request
 988                                  * to the firmware.
 989                                  */
 990                                 ar = esas2r_alloc_request(a);
 991                                 if (ar == NULL) {
 992                                         esas2r_log_dev(ESAS2R_LOG_WARN,
 993                                                        &(a->host->shost_gendev),
 994                                                        "unable to allocate an abort request for cmd %p",
 995                                                        cmd);
 996                                         return 0; /* Failure */
 997                                 }
 998
 999                                 /*
1000                                  * Task management request must be formatted
1001                                  * with a lock held.
1002                                  */
1003                                 ar->sense_len = 0;
1004                                 ar->vrq->scsi.length = 0;
1005                                 ar->target_id = rq->target_id;
1006                                 ar->vrq->scsi.flags |= cpu_to_le32(
1007                                         (u8)le32_to_cpu(rq->vrq->scsi.flags));
1008
1009                                 memset(ar->vrq->scsi.cdb, 0,
1010                                        sizeof(ar->vrq->scsi.cdb));
1011
1012                                 ar->vrq->scsi.flags |= cpu_to_le32(
1013                                         FCP_CMND_TRM);
1014                                 ar->vrq->scsi.u.abort_handle =
1015                                         rq->vrq->scsi.handle;
1016                         } else {
1017                                 /*
1018                                  * The request is pending but not active on
1019                                  * the firmware.  Just free it now and we'll
1020                                  * report the successful abort below.
1021                                  */
1022                                 list_del_init(&rq->req_list);
1023                                 esas2r_free_request(a, rq);
1024                         }
1025
1026                         found = true;
1027                         break;
1028                 }
1029
1030         }
1031
1032         if (!found)
1033                 return 1;       /* Not found */
1034
1035         return 2;               /* found */
1036
1037
1038 }
1039
1040 int esas2r_eh_abort(struct scsi_cmnd *cmd)
1041 {
1042         struct esas2r_adapter *a =
1043                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1044         struct esas2r_request *abort_request = NULL;
1045         unsigned long flags;
1046         struct list_head *queue;
1047         int result;
1048
1049         esas2r_log(ESAS2R_LOG_INFO, "eh_abort (%p)", cmd);
1050
1051         if (test_bit(AF_DEGRADED_MODE, &a->flags)) {
1052                 cmd->result = DID_ABORT << 16;
1053
1054                 scsi_set_resid(cmd, 0);
1055
1056                 cmd->scsi_done(cmd);
1057
1058                 return SUCCESS;
1059         }
1060
1061         spin_lock_irqsave(&a->queue_lock, flags);
1062
1063         /*
1064          * Run through the defer and active queues looking for the request
1065          * to abort.
1066          */
1067
1068         queue = &a->defer_list;
1069
1070 check_active_queue:
1071
1072         result = esas2r_check_active_queue(a, &abort_request, cmd, queue);
1073
1074         if (!result) {
1075                 spin_unlock_irqrestore(&a->queue_lock, flags);
1076                 return FAILED;
1077         } else if (result == 2 && (queue == &a->defer_list)) {
1078                 queue = &a->active_list;
1079                 goto check_active_queue;
1080         }
1081
1082         spin_unlock_irqrestore(&a->queue_lock, flags);
1083
1084         if (abort_request) {
1085                 u8 task_management_status = RS_PENDING;
1086
1087                 /*
1088                  * the request is already active, so we need to tell
1089                  * the firmware to abort it and wait for the response.
1090                  */
1091
1092                 abort_request->comp_cb = complete_task_management_request;
1093                 abort_request->task_management_status_ptr =
1094                         &task_management_status;
1095
1096                 esas2r_start_request(a, abort_request);
1097
1098                 if (atomic_read(&a->disable_cnt) == 0)
1099                         esas2r_do_deferred_processes(a);
1100
1101                 while (task_management_status == RS_PENDING)
1102                         msleep(10);
1103
1104                 /*
1105                  * Once we get here, the original request will have been
1106                  * completed by the firmware and the abort request will have
1107                  * been cleaned up.  we're done!
1108                  */
1109
1110                 return SUCCESS;
1111         }
1112
1113         /*
1114          * If we get here, either we found the inactive request and
1115          * freed it, or we didn't find it at all.  Either way, success!
1116          */
1117
1118         cmd->result = DID_ABORT << 16;
1119
1120         scsi_set_resid(cmd, 0);
1121
1122         cmd->scsi_done(cmd);
1123
1124         return SUCCESS;
1125 }
1126
1127 static int esas2r_host_bus_reset(struct scsi_cmnd *cmd, bool host_reset)
1128 {
1129         struct esas2r_adapter *a =
1130                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1131
1132         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1133                 return FAILED;
1134
1135         if (host_reset)
1136                 esas2r_reset_adapter(a);
1137         else
1138                 esas2r_reset_bus(a);
1139
1140         /* above call sets the AF_OS_RESET flag.  wait for it to clear. */
1141
1142         while (test_bit(AF_OS_RESET, &a->flags)) {
1143                 msleep(10);
1144
1145                 if (test_bit(AF_DEGRADED_MODE, &a->flags))
1146                         return FAILED;
1147         }
1148
1149         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1150                 return FAILED;
1151
1152         return SUCCESS;
1153 }
1154
1155 int esas2r_host_reset(struct scsi_cmnd *cmd)
1156 {
1157         esas2r_log(ESAS2R_LOG_INFO, "host_reset (%p)", cmd);
1158
1159         return esas2r_host_bus_reset(cmd, true);
1160 }
1161
1162 int esas2r_bus_reset(struct scsi_cmnd *cmd)
1163 {
1164         esas2r_log(ESAS2R_LOG_INFO, "bus_reset (%p)", cmd);
1165
1166         return esas2r_host_bus_reset(cmd, false);
1167 }
1168
1169 static int esas2r_dev_targ_reset(struct scsi_cmnd *cmd, bool target_reset)
1170 {
1171         struct esas2r_adapter *a =
1172                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1173         struct esas2r_request *rq;
1174         u8 task_management_status = RS_PENDING;
1175         bool completed;
1176
1177         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1178                 return FAILED;
1179
1180 retry:
1181         rq = esas2r_alloc_request(a);
1182         if (rq == NULL) {
1183                 if (target_reset) {
1184                         esas2r_log(ESAS2R_LOG_CRIT,
1185                                    "unable to allocate a request for a "
1186                                    "target reset (%d)!",
1187                                    cmd->device->id);
1188                 } else {
1189                         esas2r_log(ESAS2R_LOG_CRIT,
1190                                    "unable to allocate a request for a "
1191                                    "device reset (%d:%d)!",
1192                                    cmd->device->id,
1193                                    cmd->device->lun);
1194                 }
1195
1196
1197                 return FAILED;
1198         }
1199
1200         rq->target_id = cmd->device->id;
1201         rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
1202         rq->req_stat = RS_PENDING;
1203
1204         rq->comp_cb = complete_task_management_request;
1205         rq->task_management_status_ptr = &task_management_status;
1206
1207         if (target_reset) {
1208                 esas2r_debug("issuing target reset (%p) to id %d", rq,
1209                              cmd->device->id);
1210                 completed = esas2r_send_task_mgmt(a, rq, 0x20);
1211         } else {
1212                 esas2r_debug("issuing device reset (%p) to id %d lun %d", rq,
1213                              cmd->device->id, cmd->device->lun);
1214                 completed = esas2r_send_task_mgmt(a, rq, 0x10);
1215         }
1216
1217         if (completed) {
1218                 /* Task management cmd completed right away, need to free it. */
1219
1220                 esas2r_free_request(a, rq);
1221         } else {
1222                 /*
1223                  * Wait for firmware to complete the request.  Completion
1224                  * callback will free it.
1225                  */
1226                 while (task_management_status == RS_PENDING)
1227                         msleep(10);
1228         }
1229
1230         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1231                 return FAILED;
1232
1233         if (task_management_status == RS_BUSY) {
1234                 /*
1235                  * Busy, probably because we are flashing.  Wait a bit and
1236                  * try again.
1237                  */
1238                 msleep(100);
1239                 goto retry;
1240         }
1241
1242         return SUCCESS;
1243 }
1244
1245 int esas2r_device_reset(struct scsi_cmnd *cmd)
1246 {
1247         esas2r_log(ESAS2R_LOG_INFO, "device_reset (%p)", cmd);
1248
1249         return esas2r_dev_targ_reset(cmd, false);
1250
1251 }
1252
1253 int esas2r_target_reset(struct scsi_cmnd *cmd)
1254 {
1255         esas2r_log(ESAS2R_LOG_INFO, "target_reset (%p)", cmd);
1256
1257         return esas2r_dev_targ_reset(cmd, true);
1258 }
1259
1260 void esas2r_log_request_failure(struct esas2r_adapter *a,
1261                                 struct esas2r_request *rq)
1262 {
1263         u8 reqstatus = rq->req_stat;
1264
1265         if (reqstatus == RS_SUCCESS)
1266                 return;
1267
1268         if (rq->vrq->scsi.function == VDA_FUNC_SCSI) {
1269                 if (reqstatus == RS_SCSI_ERROR) {
1270                         if (rq->func_rsp.scsi_rsp.sense_len >= 13) {
1271                                 esas2r_log(ESAS2R_LOG_WARN,
1272                                            "request failure - SCSI error %x ASC:%x ASCQ:%x CDB:%x",
1273                                            rq->sense_buf[2], rq->sense_buf[12],
1274                                            rq->sense_buf[13],
1275                                            rq->vrq->scsi.cdb[0]);
1276                         } else {
1277                                 esas2r_log(ESAS2R_LOG_WARN,
1278                                            "request failure - SCSI error CDB:%x\n",
1279                                            rq->vrq->scsi.cdb[0]);
1280                         }
1281                 } else if ((rq->vrq->scsi.cdb[0] != INQUIRY
1282                             && rq->vrq->scsi.cdb[0] != REPORT_LUNS)
1283                            || (reqstatus != RS_SEL
1284                                && reqstatus != RS_SEL2)) {
1285                         if ((reqstatus == RS_UNDERRUN) &&
1286                             (rq->vrq->scsi.cdb[0] == INQUIRY)) {
1287                                 /* Don't log inquiry underruns */
1288                         } else {
1289                                 esas2r_log(ESAS2R_LOG_WARN,
1290                                            "request failure - cdb:%x reqstatus:%d target:%d",
1291                                            rq->vrq->scsi.cdb[0], reqstatus,
1292                                            rq->target_id);
1293                         }
1294                 }
1295         }
1296 }
1297
1298 void esas2r_wait_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1299 {
1300         u32 starttime;
1301         u32 timeout;
1302
1303         starttime = jiffies_to_msecs(jiffies);
1304         timeout = rq->timeout ? rq->timeout : 5000;
1305
1306         while (true) {
1307                 esas2r_polled_interrupt(a);
1308
1309                 if (rq->req_stat != RS_STARTED)
1310                         break;
1311
1312                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1313
1314                 if ((jiffies_to_msecs(jiffies) - starttime) > timeout) {
1315                         esas2r_hdebug("request TMO");
1316                         esas2r_bugon();
1317
1318                         rq->req_stat = RS_TIMEOUT;
1319
1320                         esas2r_local_reset_adapter(a);
1321                         return;
1322                 }
1323         }
1324 }
1325
1326 u32 esas2r_map_data_window(struct esas2r_adapter *a, u32 addr_lo)
1327 {
1328         u32 offset = addr_lo & (MW_DATA_WINDOW_SIZE - 1);
1329         u32 base = addr_lo & -(signed int)MW_DATA_WINDOW_SIZE;
1330
1331         if (a->window_base != base) {
1332                 esas2r_write_register_dword(a, MVR_PCI_WIN1_REMAP,
1333                                             base | MVRPW1R_ENABLE);
1334                 esas2r_flush_register_dword(a, MVR_PCI_WIN1_REMAP);
1335                 a->window_base = base;
1336         }
1337
1338         return offset;
1339 }
1340
1341 /* Read a block of data from chip memory */
1342 bool esas2r_read_mem_block(struct esas2r_adapter *a,
1343                            void *to,
1344                            u32 from,
1345                            u32 size)
1346 {
1347         u8 *end = (u8 *)to;
1348
1349         while (size) {
1350                 u32 len;
1351                 u32 offset;
1352                 u32 iatvr;
1353
1354                 iatvr = (from & -(signed int)MW_DATA_WINDOW_SIZE);
1355
1356                 esas2r_map_data_window(a, iatvr);
1357
1358                 offset = from & (MW_DATA_WINDOW_SIZE - 1);
1359                 len = size;
1360
1361                 if (len > MW_DATA_WINDOW_SIZE - offset)
1362                         len = MW_DATA_WINDOW_SIZE - offset;
1363
1364                 from += len;
1365                 size -= len;
1366
1367                 while (len--) {
1368                         *end++ = esas2r_read_data_byte(a, offset);
1369                         offset++;
1370                 }
1371         }
1372
1373         return true;
1374 }
1375
1376 void esas2r_nuxi_mgt_data(u8 function, void *data)
1377 {
1378         struct atto_vda_grp_info *g;
1379         struct atto_vda_devinfo *d;
1380         struct atto_vdapart_info *p;
1381         struct atto_vda_dh_info *h;
1382         struct atto_vda_metrics_info *m;
1383         struct atto_vda_schedule_info *s;
1384         struct atto_vda_buzzer_info *b;
1385         u8 i;
1386
1387         switch (function) {
1388         case VDAMGT_BUZZER_INFO:
1389         case VDAMGT_BUZZER_SET:
1390
1391                 b = (struct atto_vda_buzzer_info *)data;
1392
1393                 b->duration = le32_to_cpu(b->duration);
1394                 break;
1395
1396         case VDAMGT_SCHEDULE_INFO:
1397         case VDAMGT_SCHEDULE_EVENT:
1398
1399                 s = (struct atto_vda_schedule_info *)data;
1400
1401                 s->id = le32_to_cpu(s->id);
1402
1403                 break;
1404
1405         case VDAMGT_DEV_INFO:
1406         case VDAMGT_DEV_CLEAN:
1407         case VDAMGT_DEV_PT_INFO:
1408         case VDAMGT_DEV_FEATURES:
1409         case VDAMGT_DEV_PT_FEATURES:
1410         case VDAMGT_DEV_OPERATION:
1411
1412                 d = (struct atto_vda_devinfo *)data;
1413
1414                 d->capacity = le64_to_cpu(d->capacity);
1415                 d->block_size = le32_to_cpu(d->block_size);
1416                 d->ses_dev_index = le16_to_cpu(d->ses_dev_index);
1417                 d->target_id = le16_to_cpu(d->target_id);
1418                 d->lun = le16_to_cpu(d->lun);
1419                 d->features = le16_to_cpu(d->features);
1420                 break;
1421
1422         case VDAMGT_GRP_INFO:
1423         case VDAMGT_GRP_CREATE:
1424         case VDAMGT_GRP_DELETE:
1425         case VDAMGT_ADD_STORAGE:
1426         case VDAMGT_MEMBER_ADD:
1427         case VDAMGT_GRP_COMMIT:
1428         case VDAMGT_GRP_REBUILD:
1429         case VDAMGT_GRP_COMMIT_INIT:
1430         case VDAMGT_QUICK_RAID:
1431         case VDAMGT_GRP_FEATURES:
1432         case VDAMGT_GRP_COMMIT_INIT_AUTOMAP:
1433         case VDAMGT_QUICK_RAID_INIT_AUTOMAP:
1434         case VDAMGT_SPARE_LIST:
1435         case VDAMGT_SPARE_ADD:
1436         case VDAMGT_SPARE_REMOVE:
1437         case VDAMGT_LOCAL_SPARE_ADD:
1438         case VDAMGT_GRP_OPERATION:
1439
1440                 g = (struct atto_vda_grp_info *)data;
1441
1442                 g->capacity = le64_to_cpu(g->capacity);
1443                 g->block_size = le32_to_cpu(g->block_size);
1444                 g->interleave = le32_to_cpu(g->interleave);
1445                 g->features = le16_to_cpu(g->features);
1446
1447                 for (i = 0; i < 32; i++)
1448                         g->members[i] = le16_to_cpu(g->members[i]);
1449
1450                 break;
1451
1452         case VDAMGT_PART_INFO:
1453         case VDAMGT_PART_MAP:
1454         case VDAMGT_PART_UNMAP:
1455         case VDAMGT_PART_AUTOMAP:
1456         case VDAMGT_PART_SPLIT:
1457         case VDAMGT_PART_MERGE:
1458
1459                 p = (struct atto_vdapart_info *)data;
1460
1461                 p->part_size = le64_to_cpu(p->part_size);
1462                 p->start_lba = le32_to_cpu(p->start_lba);
1463                 p->block_size = le32_to_cpu(p->block_size);
1464                 p->target_id = le16_to_cpu(p->target_id);
1465                 break;
1466
1467         case VDAMGT_DEV_HEALTH_REQ:
1468
1469                 h = (struct atto_vda_dh_info *)data;
1470
1471                 h->med_defect_cnt = le32_to_cpu(h->med_defect_cnt);
1472                 h->info_exc_cnt = le32_to_cpu(h->info_exc_cnt);
1473                 break;
1474
1475         case VDAMGT_DEV_METRICS:
1476
1477                 m = (struct atto_vda_metrics_info *)data;
1478
1479                 for (i = 0; i < 32; i++)
1480                         m->dev_indexes[i] = le16_to_cpu(m->dev_indexes[i]);
1481
1482                 break;
1483
1484         default:
1485                 break;
1486         }
1487 }
1488
1489 void esas2r_nuxi_cfg_data(u8 function, void *data)
1490 {
1491         struct atto_vda_cfg_init *ci;
1492
1493         switch (function) {
1494         case VDA_CFG_INIT:
1495         case VDA_CFG_GET_INIT:
1496         case VDA_CFG_GET_INIT2:
1497
1498                 ci = (struct atto_vda_cfg_init *)data;
1499
1500                 ci->date_time.year = le16_to_cpu(ci->date_time.year);
1501                 ci->sgl_page_size = le32_to_cpu(ci->sgl_page_size);
1502                 ci->vda_version = le32_to_cpu(ci->vda_version);
1503                 ci->epoch_time = le32_to_cpu(ci->epoch_time);
1504                 ci->ioctl_tunnel = le32_to_cpu(ci->ioctl_tunnel);
1505                 ci->num_targets_backend = le32_to_cpu(ci->num_targets_backend);
1506                 break;
1507
1508         default:
1509                 break;
1510         }
1511 }
1512
1513 void esas2r_nuxi_ae_data(union atto_vda_ae *ae)
1514 {
1515         struct atto_vda_ae_raid *r = &ae->raid;
1516         struct atto_vda_ae_lu *l = &ae->lu;
1517
1518         switch (ae->hdr.bytype) {
1519         case VDAAE_HDR_TYPE_RAID:
1520
1521                 r->dwflags = le32_to_cpu(r->dwflags);
1522                 break;
1523
1524         case VDAAE_HDR_TYPE_LU:
1525
1526                 l->dwevent = le32_to_cpu(l->dwevent);
1527                 l->wphys_target_id = le16_to_cpu(l->wphys_target_id);
1528                 l->id.tgtlun.wtarget_id = le16_to_cpu(l->id.tgtlun.wtarget_id);
1529
1530                 if (l->hdr.bylength >= offsetof(struct atto_vda_ae_lu, id)
1531                     + sizeof(struct atto_vda_ae_lu_tgt_lun_raid)) {
1532                         l->id.tgtlun_raid.dwinterleave
1533                                 = le32_to_cpu(l->id.tgtlun_raid.dwinterleave);
1534                         l->id.tgtlun_raid.dwblock_size
1535                                 = le32_to_cpu(l->id.tgtlun_raid.dwblock_size);
1536                 }
1537
1538                 break;
1539
1540         case VDAAE_HDR_TYPE_DISK:
1541         default:
1542                 break;
1543         }
1544 }
1545
1546 void esas2r_free_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1547 {
1548         unsigned long flags;
1549
1550         esas2r_rq_destroy_request(rq, a);
1551         spin_lock_irqsave(&a->request_lock, flags);
1552         list_add(&rq->comp_list, &a->avail_request);
1553         spin_unlock_irqrestore(&a->request_lock, flags);
1554 }
1555
1556 struct esas2r_request *esas2r_alloc_request(struct esas2r_adapter *a)
1557 {
1558         struct esas2r_request *rq;
1559         unsigned long flags;
1560
1561         spin_lock_irqsave(&a->request_lock, flags);
1562
1563         if (unlikely(list_empty(&a->avail_request))) {
1564                 spin_unlock_irqrestore(&a->request_lock, flags);
1565                 return NULL;
1566         }
1567
1568         rq = list_first_entry(&a->avail_request, struct esas2r_request,
1569                               comp_list);
1570         list_del(&rq->comp_list);
1571         spin_unlock_irqrestore(&a->request_lock, flags);
1572         esas2r_rq_init_request(rq, a);
1573
1574         return rq;
1575
1576 }
1577
1578 void esas2r_complete_request_cb(struct esas2r_adapter *a,
1579                                 struct esas2r_request *rq)
1580 {
1581         esas2r_debug("completing request %p\n", rq);
1582
1583         scsi_dma_unmap(rq->cmd);
1584
1585         if (unlikely(rq->req_stat != RS_SUCCESS)) {
1586                 esas2r_debug("[%x STATUS %x:%x (%x)]", rq->target_id,
1587                              rq->req_stat,
1588                              rq->func_rsp.scsi_rsp.scsi_stat,
1589                              rq->cmd);
1590
1591                 rq->cmd->result =
1592                         ((esas2r_req_status_to_error(rq->req_stat) << 16)
1593                          | (rq->func_rsp.scsi_rsp.scsi_stat & STATUS_MASK));
1594
1595                 if (rq->req_stat == RS_UNDERRUN)
1596                         scsi_set_resid(rq->cmd,
1597                                        le32_to_cpu(rq->func_rsp.scsi_rsp.
1598                                                    residual_length));
1599                 else
1600                         scsi_set_resid(rq->cmd, 0);
1601         }
1602
1603         rq->cmd->scsi_done(rq->cmd);
1604
1605         esas2r_free_request(a, rq);
1606 }
1607
1608 /* Run tasklet to handle stuff outside of interrupt context. */
1609 void esas2r_adapter_tasklet(unsigned long context)
1610 {
1611         struct esas2r_adapter *a = (struct esas2r_adapter *)context;
1612
1613         if (unlikely(test_bit(AF2_TIMER_TICK, &a->flags2))) {
1614                 clear_bit(AF2_TIMER_TICK, &a->flags2);
1615                 esas2r_timer_tick(a);
1616         }
1617
1618         if (likely(test_bit(AF2_INT_PENDING, &a->flags2))) {
1619                 clear_bit(AF2_INT_PENDING, &a->flags2);
1620                 esas2r_adapter_interrupt(a);
1621         }
1622
1623         if (esas2r_is_tasklet_pending(a))
1624                 esas2r_do_tasklet_tasks(a);
1625
1626         if (esas2r_is_tasklet_pending(a)
1627             || (test_bit(AF2_INT_PENDING, &a->flags2))
1628             || (test_bit(AF2_TIMER_TICK, &a->flags2))) {
1629                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1630                 esas2r_schedule_tasklet(a);
1631         } else {
1632                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1633         }
1634 }
1635
1636 static void esas2r_timer_callback(unsigned long context);
1637
1638 void esas2r_kickoff_timer(struct esas2r_adapter *a)
1639 {
1640         init_timer(&a->timer);
1641
1642         a->timer.function = esas2r_timer_callback;
1643         a->timer.data = (unsigned long)a;
1644         a->timer.expires = jiffies +
1645                            msecs_to_jiffies(100);
1646
1647         add_timer(&a->timer);
1648 }
1649
1650 static void esas2r_timer_callback(unsigned long context)
1651 {
1652         struct esas2r_adapter *a = (struct esas2r_adapter *)context;
1653
1654         set_bit(AF2_TIMER_TICK, &a->flags2);
1655
1656         esas2r_schedule_tasklet(a);
1657
1658         esas2r_kickoff_timer(a);
1659 }
1660
1661 /*
1662  * Firmware events need to be handled outside of interrupt context
1663  * so we schedule a delayed_work to handle them.
1664  */
1665
1666 static void
1667 esas2r_free_fw_event(struct esas2r_fw_event_work *fw_event)
1668 {
1669         unsigned long flags;
1670         struct esas2r_adapter *a = fw_event->a;
1671
1672         spin_lock_irqsave(&a->fw_event_lock, flags);
1673         list_del(&fw_event->list);
1674         kfree(fw_event);
1675         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1676 }
1677
1678 void
1679 esas2r_fw_event_off(struct esas2r_adapter *a)
1680 {
1681         unsigned long flags;
1682
1683         spin_lock_irqsave(&a->fw_event_lock, flags);
1684         a->fw_events_off = 1;
1685         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1686 }
1687
1688 void
1689 esas2r_fw_event_on(struct esas2r_adapter *a)
1690 {
1691         unsigned long flags;
1692
1693         spin_lock_irqsave(&a->fw_event_lock, flags);
1694         a->fw_events_off = 0;
1695         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1696 }
1697
1698 static void esas2r_add_device(struct esas2r_adapter *a, u16 target_id)
1699 {
1700         int ret;
1701         struct scsi_device *scsi_dev;
1702
1703         scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1704
1705         if (scsi_dev) {
1706                 esas2r_log_dev(
1707                         ESAS2R_LOG_WARN,
1708                         &(scsi_dev->
1709                           sdev_gendev),
1710                         "scsi device already exists at id %d", target_id);
1711
1712                 scsi_device_put(scsi_dev);
1713         } else {
1714                 esas2r_log_dev(
1715                         ESAS2R_LOG_INFO,
1716                         &(a->host->
1717                           shost_gendev),
1718                         "scsi_add_device() called for 0:%d:0",
1719                         target_id);
1720
1721                 ret = scsi_add_device(a->host, 0, target_id, 0);
1722                 if (ret) {
1723                         esas2r_log_dev(
1724                                 ESAS2R_LOG_CRIT,
1725                                 &(a->host->
1726                                   shost_gendev),
1727                                 "scsi_add_device failed with %d for id %d",
1728                                 ret, target_id);
1729                 }
1730         }
1731 }
1732
1733 static void esas2r_remove_device(struct esas2r_adapter *a, u16 target_id)
1734 {
1735         struct scsi_device *scsi_dev;
1736
1737         scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1738
1739         if (scsi_dev) {
1740                 scsi_device_set_state(scsi_dev, SDEV_OFFLINE);
1741
1742                 esas2r_log_dev(
1743                         ESAS2R_LOG_INFO,
1744                         &(scsi_dev->
1745                           sdev_gendev),
1746                         "scsi_remove_device() called for 0:%d:0",
1747                         target_id);
1748
1749                 scsi_remove_device(scsi_dev);
1750
1751                 esas2r_log_dev(
1752                         ESAS2R_LOG_INFO,
1753                         &(scsi_dev->
1754                           sdev_gendev),
1755                         "scsi_device_put() called");
1756
1757                 scsi_device_put(scsi_dev);
1758         } else {
1759                 esas2r_log_dev(
1760                         ESAS2R_LOG_WARN,
1761                         &(a->host->shost_gendev),
1762                         "no target found at id %d",
1763                         target_id);
1764         }
1765 }
1766
1767 /*
1768  * Sends a firmware asynchronous event to anyone who happens to be
1769  * listening on the defined ATTO VDA event ports.
1770  */
1771 static void esas2r_send_ae_event(struct esas2r_fw_event_work *fw_event)
1772 {
1773         struct esas2r_vda_ae *ae = (struct esas2r_vda_ae *)fw_event->data;
1774         char *type;
1775
1776         switch (ae->vda_ae.hdr.bytype) {
1777         case VDAAE_HDR_TYPE_RAID:
1778                 type = "RAID group state change";
1779                 break;
1780
1781         case VDAAE_HDR_TYPE_LU:
1782                 type = "Mapped destination LU change";
1783                 break;
1784
1785         case VDAAE_HDR_TYPE_DISK:
1786                 type = "Physical disk inventory change";
1787                 break;
1788
1789         case VDAAE_HDR_TYPE_RESET:
1790                 type = "Firmware reset";
1791                 break;
1792
1793         case VDAAE_HDR_TYPE_LOG_INFO:
1794                 type = "Event Log message (INFO level)";
1795                 break;
1796
1797         case VDAAE_HDR_TYPE_LOG_WARN:
1798                 type = "Event Log message (WARN level)";
1799                 break;
1800
1801         case VDAAE_HDR_TYPE_LOG_CRIT:
1802                 type = "Event Log message (CRIT level)";
1803                 break;
1804
1805         case VDAAE_HDR_TYPE_LOG_FAIL:
1806                 type = "Event Log message (FAIL level)";
1807                 break;
1808
1809         case VDAAE_HDR_TYPE_NVC:
1810                 type = "NVCache change";
1811                 break;
1812
1813         case VDAAE_HDR_TYPE_TLG_INFO:
1814                 type = "Time stamped log message (INFO level)";
1815                 break;
1816
1817         case VDAAE_HDR_TYPE_TLG_WARN:
1818                 type = "Time stamped log message (WARN level)";
1819                 break;
1820
1821         case VDAAE_HDR_TYPE_TLG_CRIT:
1822                 type = "Time stamped log message (CRIT level)";
1823                 break;
1824
1825         case VDAAE_HDR_TYPE_PWRMGT:
1826                 type = "Power management";
1827                 break;
1828
1829         case VDAAE_HDR_TYPE_MUTE:
1830                 type = "Mute button pressed";
1831                 break;
1832
1833         case VDAAE_HDR_TYPE_DEV:
1834                 type = "Device attribute change";
1835                 break;
1836
1837         default:
1838                 type = "Unknown";
1839                 break;
1840         }
1841
1842         esas2r_log(ESAS2R_LOG_WARN,
1843                    "An async event of type \"%s\" was received from the firmware.  The event contents are:",
1844                    type);
1845         esas2r_log_hexdump(ESAS2R_LOG_WARN, &ae->vda_ae,
1846                            ae->vda_ae.hdr.bylength);
1847
1848 }
1849
1850 static void
1851 esas2r_firmware_event_work(struct work_struct *work)
1852 {
1853         struct esas2r_fw_event_work *fw_event =
1854                 container_of(work, struct esas2r_fw_event_work, work.work);
1855
1856         struct esas2r_adapter *a = fw_event->a;
1857
1858         u16 target_id = *(u16 *)&fw_event->data[0];
1859
1860         if (a->fw_events_off)
1861                 goto done;
1862
1863         switch (fw_event->type) {
1864         case fw_event_null:
1865                 break; /* do nothing */
1866
1867         case fw_event_lun_change:
1868                 esas2r_remove_device(a, target_id);
1869                 esas2r_add_device(a, target_id);
1870                 break;
1871
1872         case fw_event_present:
1873                 esas2r_add_device(a, target_id);
1874                 break;
1875
1876         case fw_event_not_present:
1877                 esas2r_remove_device(a, target_id);
1878                 break;
1879
1880         case fw_event_vda_ae:
1881                 esas2r_send_ae_event(fw_event);
1882                 break;
1883         }
1884
1885 done:
1886         esas2r_free_fw_event(fw_event);
1887 }
1888
1889 void esas2r_queue_fw_event(struct esas2r_adapter *a,
1890                            enum fw_event_type type,
1891                            void *data,
1892                            int data_sz)
1893 {
1894         struct esas2r_fw_event_work *fw_event;
1895         unsigned long flags;
1896
1897         fw_event = kzalloc(sizeof(struct esas2r_fw_event_work), GFP_ATOMIC);
1898         if (!fw_event) {
1899                 esas2r_log(ESAS2R_LOG_WARN,
1900                            "esas2r_queue_fw_event failed to alloc");
1901                 return;
1902         }
1903
1904         if (type == fw_event_vda_ae) {
1905                 struct esas2r_vda_ae *ae =
1906                         (struct esas2r_vda_ae *)fw_event->data;
1907
1908                 ae->signature = ESAS2R_VDA_EVENT_SIG;
1909                 ae->bus_number = a->pcid->bus->number;
1910                 ae->devfn = a->pcid->devfn;
1911                 memcpy(&ae->vda_ae, data, sizeof(ae->vda_ae));
1912         } else {
1913                 memcpy(fw_event->data, data, data_sz);
1914         }
1915
1916         fw_event->type = type;
1917         fw_event->a = a;
1918
1919         spin_lock_irqsave(&a->fw_event_lock, flags);
1920         list_add_tail(&fw_event->list, &a->fw_event_list);
1921         INIT_DELAYED_WORK(&fw_event->work, esas2r_firmware_event_work);
1922         queue_delayed_work_on(
1923                 smp_processor_id(), a->fw_event_q, &fw_event->work,
1924                 msecs_to_jiffies(1));
1925         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1926 }
1927
1928 void esas2r_target_state_changed(struct esas2r_adapter *a, u16 targ_id,
1929                                  u8 state)
1930 {
1931         if (state == TS_LUN_CHANGE)
1932                 esas2r_queue_fw_event(a, fw_event_lun_change, &targ_id,
1933                                       sizeof(targ_id));
1934         else if (state == TS_PRESENT)
1935                 esas2r_queue_fw_event(a, fw_event_present, &targ_id,
1936                                       sizeof(targ_id));
1937         else if (state == TS_NOT_PRESENT)
1938                 esas2r_queue_fw_event(a, fw_event_not_present, &targ_id,
1939                                       sizeof(targ_id));
1940 }
1941
1942 /* Translate status to a Linux SCSI mid-layer error code */
1943 int esas2r_req_status_to_error(u8 req_stat)
1944 {
1945         switch (req_stat) {
1946         case RS_OVERRUN:
1947         case RS_UNDERRUN:
1948         case RS_SUCCESS:
1949         /*
1950          * NOTE: SCSI mid-layer wants a good status for a SCSI error, because
1951          *       it will check the scsi_stat value in the completion anyway.
1952          */
1953         case RS_SCSI_ERROR:
1954                 return DID_OK;
1955
1956         case RS_SEL:
1957         case RS_SEL2:
1958                 return DID_NO_CONNECT;
1959
1960         case RS_RESET:
1961                 return DID_RESET;
1962
1963         case RS_ABORTED:
1964                 return DID_ABORT;
1965
1966         case RS_BUSY:
1967                 return DID_BUS_BUSY;
1968         }
1969
1970         /* everything else is just an error. */
1971
1972         return DID_ERROR;
1973 }
1974
1975 module_init(esas2r_init);
1976 module_exit(esas2r_exit);