Pileus Git - ~andy/linux/blob - 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         .slave_configure                = esas2r_slave_configure,
 258         .slave_alloc                    = esas2r_slave_alloc,
 259         .slave_destroy                  = esas2r_slave_destroy,
 260         .change_queue_depth             = esas2r_change_queue_depth,
 261         .change_queue_type              = esas2r_change_queue_type,
 262         .max_sectors                    = 0xFFFF,
 263 };
 264
 265 int sgl_page_size = 512;
 266 module_param(sgl_page_size, int, 0);
 267 MODULE_PARM_DESC(sgl_page_size,
 268                  "Scatter/gather list (SGL) page size in number of S/G "
 269                  "entries.  If your application is doing a lot of very large "
 270                  "transfers, you may want to increase the SGL page size.  "
 271                  "Default 512.");
 272
 273 int num_sg_lists = 1024;
 274 module_param(num_sg_lists, int, 0);
 275 MODULE_PARM_DESC(num_sg_lists,
 276                  "Number of scatter/gather lists.  Default 1024.");
 277
 278 int sg_tablesize = SCSI_MAX_SG_SEGMENTS;
 279 module_param(sg_tablesize, int, 0);
 280 MODULE_PARM_DESC(sg_tablesize,
 281                  "Maximum number of entries in a scatter/gather table.");
 282
 283 int num_requests = 256;
 284 module_param(num_requests, int, 0);
 285 MODULE_PARM_DESC(num_requests,
 286                  "Number of requests.  Default 256.");
 287
 288 int num_ae_requests = 4;
 289 module_param(num_ae_requests, int, 0);
 290 MODULE_PARM_DESC(num_ae_requests,
 291                  "Number of VDA asynchromous event requests.  Default 4.");
 292
 293 int cmd_per_lun = ESAS2R_DEFAULT_CMD_PER_LUN;
 294 module_param(cmd_per_lun, int, 0);
 295 MODULE_PARM_DESC(cmd_per_lun,
 296                  "Maximum number of commands per LUN.  Default "
 297                  DEFINED_NUM_TO_STR(ESAS2R_DEFAULT_CMD_PER_LUN) ".");
 298
 299 int can_queue = 128;
 300 module_param(can_queue, int, 0);
 301 MODULE_PARM_DESC(can_queue,
 302                  "Maximum number of commands per adapter.  Default 128.");
 303
 304 int esas2r_max_sectors = 0xFFFF;
 305 module_param(esas2r_max_sectors, int, 0);
 306 MODULE_PARM_DESC(esas2r_max_sectors,
 307                  "Maximum number of disk sectors in a single data transfer.  "
 308                  "Default 65535 (largest possible setting).");
 309
 310 int interrupt_mode = 1;
 311 module_param(interrupt_mode, int, 0);
 312 MODULE_PARM_DESC(interrupt_mode,
 313                  "Defines the interrupt mode to use.  0 for legacy"
 314                  ", 1 for MSI.  Default is MSI (1).");
 315
 316 static struct pci_device_id
 317         esas2r_pci_table[] = {
 318         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x0049,
 319           0,
 320           0, 0 },
 321         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004A,
 322           0,
 323           0, 0 },
 324         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004B,
 325           0,
 326           0, 0 },
 327         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004C,
 328           0,
 329           0, 0 },
 330         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004D,
 331           0,
 332           0, 0 },
 333         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004E,
 334           0,
 335           0, 0 },
 336         { 0,              0,              0,              0,
 337           0,
 338           0, 0 }
 339 };
 340
 341 MODULE_DEVICE_TABLE(pci, esas2r_pci_table);
 342
 343 static int
 344 esas2r_probe(struct pci_dev *pcid, const struct pci_device_id *id);
 345
 346 static void
 347 esas2r_remove(struct pci_dev *pcid);
 348
 349 static struct pci_driver
 350         esas2r_pci_driver = {
 351         .name           = ESAS2R_DRVR_NAME,
 352         .id_table       = esas2r_pci_table,
 353         .probe          = esas2r_probe,
 354         .remove         = esas2r_remove,
 355         .suspend        = esas2r_suspend,
 356         .resume         = esas2r_resume,
 357 };
 358
 359 static int esas2r_probe(struct pci_dev *pcid,
 360                         const struct pci_device_id *id)
 361 {
 362         struct Scsi_Host *host = NULL;
 363         struct esas2r_adapter *a;
 364         int err;
 365
 366         size_t host_alloc_size = sizeof(struct esas2r_adapter)
 367                                  + ((num_requests) +
 368                                     1) * sizeof(struct esas2r_request);
 369
 370         esas2r_log_dev(ESAS2R_LOG_DEBG, &(pcid->dev),
 371                        "esas2r_probe() 0x%02x 0x%02x 0x%02x 0x%02x",
 372                        pcid->vendor,
 373                        pcid->device,
 374                        pcid->subsystem_vendor,
 375                        pcid->subsystem_device);
 376
 377         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 378                        "before pci_enable_device() "
 379                        "enable_cnt: %d",
 380                        pcid->enable_cnt.counter);
 381
 382         err = pci_enable_device(pcid);
 383         if (err != 0) {
 384                 esas2r_log_dev(ESAS2R_LOG_CRIT, &(pcid->dev),
 385                                "pci_enable_device() FAIL (%d)",
 386                                err);
 387                 return -ENODEV;
 388         }
 389
 390         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 391                        "pci_enable_device() OK");
 392         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 393                        "after pci_device_enable() enable_cnt: %d",
 394                        pcid->enable_cnt.counter);
 395
 396         host = scsi_host_alloc(&driver_template, host_alloc_size);
 397         if (host == NULL) {
 398                 esas2r_log(ESAS2R_LOG_CRIT, "scsi_host_alloc() FAIL");
 399                 return -ENODEV;
 400         }
 401
 402         memset(host->hostdata, 0, host_alloc_size);
 403
 404         a = (struct esas2r_adapter *)host->hostdata;
 405
 406         esas2r_log(ESAS2R_LOG_INFO, "scsi_host_alloc() OK host: %p", host);
 407
 408         /* override max LUN and max target id */
 409
 410         host->max_id = ESAS2R_MAX_ID + 1;
 411         host->max_lun = 255;
 412
 413         /* we can handle 16-byte CDbs */
 414
 415         host->max_cmd_len = 16;
 416
 417         host->can_queue = can_queue;
 418         host->cmd_per_lun = cmd_per_lun;
 419         host->this_id = host->max_id + 1;
 420         host->max_channel = 0;
 421         host->unique_id = found_adapters;
 422         host->sg_tablesize = sg_tablesize;
 423         host->max_sectors = esas2r_max_sectors;
 424
 425         /* set to bus master for BIOses that don't do it for us */
 426
 427         esas2r_log(ESAS2R_LOG_INFO, "pci_set_master() called");
 428
 429         pci_set_master(pcid);
 430
 431         if (!esas2r_init_adapter(host, pcid, found_adapters)) {
 432                 esas2r_log(ESAS2R_LOG_CRIT,
 433                            "unable to initialize device at PCI bus %x:%x",
 434                            pcid->bus->number,
 435                            pcid->devfn);
 436
 437                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 438                                "scsi_host_put() called");
 439
 440                 scsi_host_put(host);
 441
 442                 return 0;
 443
 444         }
 445
 446         esas2r_log(ESAS2R_LOG_INFO, "pci_set_drvdata(%p, %p) called", pcid,
 447                    host->hostdata);
 448
 449         pci_set_drvdata(pcid, host);
 450
 451         esas2r_log(ESAS2R_LOG_INFO, "scsi_add_host() called");
 452
 453         err = scsi_add_host(host, &pcid->dev);
 454
 455         if (err) {
 456                 esas2r_log(ESAS2R_LOG_CRIT, "scsi_add_host returned %d", err);
 457                 esas2r_log_dev(ESAS2R_LOG_CRIT, &(host->shost_gendev),
 458                                "scsi_add_host() FAIL");
 459
 460                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 461                                "scsi_host_put() called");
 462
 463                 scsi_host_put(host);
 464
 465                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 466                                "pci_set_drvdata(%p, NULL) called",
 467                                pcid);
 468
 469                 pci_set_drvdata(pcid, NULL);
 470
 471                 return -ENODEV;
 472         }
 473
 474
 475         esas2r_fw_event_on(a);
 476
 477         esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 478                        "scsi_scan_host() called");
 479
 480         scsi_scan_host(host);
 481
 482         /* Add sysfs binary files */
 483         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fw))
 484                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 485                                "Failed to create sysfs binary file: fw");
 486         else
 487                 a->sysfs_fw_created = 1;
 488
 489         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fs))
 490                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 491                                "Failed to create sysfs binary file: fs");
 492         else
 493                 a->sysfs_fs_created = 1;
 494
 495         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_vda))
 496                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 497                                "Failed to create sysfs binary file: vda");
 498         else
 499                 a->sysfs_vda_created = 1;
 500
 501         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_hw))
 502                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 503                                "Failed to create sysfs binary file: hw");
 504         else
 505                 a->sysfs_hw_created = 1;
 506
 507         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_live_nvram))
 508                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 509                                "Failed to create sysfs binary file: live_nvram");
 510         else
 511                 a->sysfs_live_nvram_created = 1;
 512
 513         if (sysfs_create_bin_file(&host->shost_dev.kobj,
 514                                   &bin_attr_default_nvram))
 515                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 516                                "Failed to create sysfs binary file: default_nvram");
 517         else
 518                 a->sysfs_default_nvram_created = 1;
 519
 520         found_adapters++;
 521
 522         return 0;
 523 }
 524
 525 static void esas2r_remove(struct pci_dev *pdev)
 526 {
 527         struct Scsi_Host *host;
 528         int index;
 529
 530         if (pdev == NULL) {
 531                 esas2r_log(ESAS2R_LOG_WARN, "esas2r_remove pdev==NULL");
 532                 return;
 533         }
 534
 535         host = pci_get_drvdata(pdev);
 536
 537         if (host == NULL) {
 538                 /*
 539                  * this can happen if pci_set_drvdata was already called
 540                  * to clear the host pointer.  if this is the case, we
 541                  * are okay; this channel has already been cleaned up.
 542                  */
 543
 544                 return;
 545         }
 546
 547         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 548                        "esas2r_remove(%p) called; "
 549                        "host:%p", pdev,
 550                        host);
 551
 552         index = esas2r_cleanup(host);
 553
 554         if (index < 0)
 555                 esas2r_log_dev(ESAS2R_LOG_WARN, &(pdev->dev),
 556                                "unknown host in %s",
 557                                __func__);
 558
 559         found_adapters--;
 560
 561         /* if this was the last adapter, clean up the rest of the driver */
 562
 563         if (found_adapters == 0)
 564                 esas2r_cleanup(NULL);
 565 }
 566
 567 static int __init esas2r_init(void)
 568 {
 569         int i;
 570
 571         esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
 572
 573         /* verify valid parameters */
 574
 575         if (can_queue < 1) {
 576                 esas2r_log(ESAS2R_LOG_WARN,
 577                            "warning: can_queue must be at least 1, value "
 578                            "forced.");
 579                 can_queue = 1;
 580         } else if (can_queue > 2048) {
 581                 esas2r_log(ESAS2R_LOG_WARN,
 582                            "warning: can_queue must be no larger than 2048, "
 583                            "value forced.");
 584                 can_queue = 2048;
 585         }
 586
 587         if (cmd_per_lun < 1) {
 588                 esas2r_log(ESAS2R_LOG_WARN,
 589                            "warning: cmd_per_lun must be at least 1, value "
 590                            "forced.");
 591                 cmd_per_lun = 1;
 592         } else if (cmd_per_lun > 2048) {
 593                 esas2r_log(ESAS2R_LOG_WARN,
 594                            "warning: cmd_per_lun must be no larger than "
 595                            "2048, value forced.");
 596                 cmd_per_lun = 2048;
 597         }
 598
 599         if (sg_tablesize < 32) {
 600                 esas2r_log(ESAS2R_LOG_WARN,
 601                            "warning: sg_tablesize must be at least 32, "
 602                            "value forced.");
 603                 sg_tablesize = 32;
 604         }
 605
 606         if (esas2r_max_sectors < 1) {
 607                 esas2r_log(ESAS2R_LOG_WARN,
 608                            "warning: esas2r_max_sectors must be at least "
 609                            "1, value forced.");
 610                 esas2r_max_sectors = 1;
 611         } else if (esas2r_max_sectors > 0xffff) {
 612                 esas2r_log(ESAS2R_LOG_WARN,
 613                            "warning: esas2r_max_sectors must be no larger "
 614                            "than 0xffff, value forced.");
 615                 esas2r_max_sectors = 0xffff;
 616         }
 617
 618         sgl_page_size &= ~(ESAS2R_SGL_ALIGN - 1);
 619
 620         if (sgl_page_size < SGL_PG_SZ_MIN)
 621                 sgl_page_size = SGL_PG_SZ_MIN;
 622         else if (sgl_page_size > SGL_PG_SZ_MAX)
 623                 sgl_page_size = SGL_PG_SZ_MAX;
 624
 625         if (num_sg_lists < NUM_SGL_MIN)
 626                 num_sg_lists = NUM_SGL_MIN;
 627         else if (num_sg_lists > NUM_SGL_MAX)
 628                 num_sg_lists = NUM_SGL_MAX;
 629
 630         if (num_requests < NUM_REQ_MIN)
 631                 num_requests = NUM_REQ_MIN;
 632         else if (num_requests > NUM_REQ_MAX)
 633                 num_requests = NUM_REQ_MAX;
 634
 635         if (num_ae_requests < NUM_AE_MIN)
 636                 num_ae_requests = NUM_AE_MIN;
 637         else if (num_ae_requests > NUM_AE_MAX)
 638                 num_ae_requests = NUM_AE_MAX;
 639
 640         /* set up other globals */
 641
 642         for (i = 0; i < MAX_ADAPTERS; i++)
 643                 esas2r_adapters[i] = NULL;
 644
 645         /* initialize */
 646
 647         driver_template.module = THIS_MODULE;
 648
 649         if (pci_register_driver(&esas2r_pci_driver) != 0)
 650                 esas2r_log(ESAS2R_LOG_CRIT, "pci_register_driver FAILED");
 651         else
 652                 esas2r_log(ESAS2R_LOG_INFO, "pci_register_driver() OK");
 653
 654         if (!found_adapters) {
 655                 pci_unregister_driver(&esas2r_pci_driver);
 656                 esas2r_cleanup(NULL);
 657
 658                 esas2r_log(ESAS2R_LOG_CRIT,
 659                            "driver will not be loaded because no ATTO "
 660                            "%s devices were found",
 661                            ESAS2R_DRVR_NAME);
 662                 return -1;
 663         } else {
 664                 esas2r_log(ESAS2R_LOG_INFO, "found %d adapters",
 665                            found_adapters);
 666         }
 667
 668         return 0;
 669 }
 670
 671 /* Handle ioctl calls to "/proc/scsi/esas2r/ATTOnode" */
 672 static const struct file_operations esas2r_proc_fops = {
 673         .compat_ioctl   = esas2r_proc_ioctl,
 674         .unlocked_ioctl = esas2r_proc_ioctl,
 675 };
 676
 677 static struct Scsi_Host *esas2r_proc_host;
 678 static int esas2r_proc_major;
 679
 680 long esas2r_proc_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
 681 {
 682         return esas2r_ioctl_handler(esas2r_proc_host->hostdata,
 683                                     (int)cmd, (void __user *)arg);
 684 }
 685
 686 static void __exit esas2r_exit(void)
 687 {
 688         esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
 689
 690         if (esas2r_proc_major > 0) {
 691                 esas2r_log(ESAS2R_LOG_INFO, "unregister proc");
 692
 693                 remove_proc_entry(ATTONODE_NAME,
 694                                   esas2r_proc_host->hostt->proc_dir);
 695                 unregister_chrdev(esas2r_proc_major, ESAS2R_DRVR_NAME);
 696
 697                 esas2r_proc_major = 0;
 698         }
 699
 700         esas2r_log(ESAS2R_LOG_INFO, "pci_unregister_driver() called");
 701
 702         pci_unregister_driver(&esas2r_pci_driver);
 703 }
 704
 705 int esas2r_show_info(struct seq_file *m, struct Scsi_Host *sh)
 706 {
 707         struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
 708
 709         struct esas2r_target *t;
 710         int dev_count = 0;
 711
 712         esas2r_log(ESAS2R_LOG_DEBG, "esas2r_show_info (%p,%d)", m, sh->host_no);
 713
 714         seq_printf(m, ESAS2R_LONGNAME "\n"
 715                    "Driver version: "ESAS2R_VERSION_STR "\n"
 716                    "Flash version: %s\n"
 717                    "Firmware version: %s\n"
 718                    "Copyright "ESAS2R_COPYRIGHT_YEARS "\n"
 719                    "http://www.attotech.com\n"
 720                    "\n",
 721                    a->flash_rev,
 722                    a->fw_rev[0] ? a->fw_rev : "(none)");
 723
 724
 725         seq_printf(m, "Adapter information:\n"
 726                    "--------------------\n"
 727                    "Model: %s\n"
 728                    "SAS address: %02X%02X%02X%02X:%02X%02X%02X%02X\n",
 729                    esas2r_get_model_name(a),
 730                    a->nvram->sas_addr[0],
 731                    a->nvram->sas_addr[1],
 732                    a->nvram->sas_addr[2],
 733                    a->nvram->sas_addr[3],
 734                    a->nvram->sas_addr[4],
 735                    a->nvram->sas_addr[5],
 736                    a->nvram->sas_addr[6],
 737                    a->nvram->sas_addr[7]);
 738
 739         seq_puts(m, "\n"
 740                    "Discovered devices:\n"
 741                    "\n"
 742                    "   #  Target ID\n"
 743                    "---------------\n");
 744
 745         for (t = a->targetdb; t < a->targetdb_end; t++)
 746                 if (t->buffered_target_state == TS_PRESENT) {
 747                         seq_printf(m, " %3d   %3d\n",
 748                                    ++dev_count,
 749                                    (u16)(uintptr_t)(t - a->targetdb));
 750                 }
 751
 752         if (dev_count == 0)
 753                 seq_puts(m, "none\n");
 754
 755         seq_puts(m, "\n");
 756         return 0;
 757
 758 }
 759
 760 int esas2r_release(struct Scsi_Host *sh)
 761 {
 762         esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
 763                        "esas2r_release() called");
 764
 765         esas2r_cleanup(sh);
 766         if (sh->irq)
 767                 free_irq(sh->irq, NULL);
 768         scsi_unregister(sh);
 769         return 0;
 770 }
 771
 772 const char *esas2r_info(struct Scsi_Host *sh)
 773 {
 774         struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
 775         static char esas2r_info_str[512];
 776
 777         esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
 778                        "esas2r_info() called");
 779
 780         /*
 781          * if we haven't done so already, register as a char driver
 782          * and stick a node under "/proc/scsi/esas2r/ATTOnode"
 783          */
 784
 785         if (esas2r_proc_major <= 0) {
 786                 esas2r_proc_host = sh;
 787
 788                 esas2r_proc_major = register_chrdev(0, ESAS2R_DRVR_NAME,
 789                                                     &esas2r_proc_fops);
 790
 791                 esas2r_log_dev(ESAS2R_LOG_DEBG, &(sh->shost_gendev),
 792                                "register_chrdev (major %d)",
 793                                esas2r_proc_major);
 794
 795                 if (esas2r_proc_major > 0) {
 796                         struct proc_dir_entry *pde;
 797
 798                         pde = proc_create(ATTONODE_NAME, 0,
 799                                           sh->hostt->proc_dir,
 800                                           &esas2r_proc_fops);
 801
 802                         if (!pde) {
 803                                 esas2r_log_dev(ESAS2R_LOG_WARN,
 804                                                &(sh->shost_gendev),
 805                                                "failed to create_proc_entry");
 806                                 esas2r_proc_major = -1;
 807                         }
 808                 }
 809         }
 810
 811         sprintf(esas2r_info_str,
 812                 ESAS2R_LONGNAME " (bus 0x%02X, device 0x%02X, IRQ 0x%02X)"
 813                 " driver version: "ESAS2R_VERSION_STR "  firmware version: "
 814                 "%s\n",
 815                 a->pcid->bus->number, a->pcid->devfn, a->pcid->irq,
 816                 a->fw_rev[0] ? a->fw_rev : "(none)");
 817
 818         return esas2r_info_str;
 819 }
 820
 821 /* Callback for building a request scatter/gather list */
 822 static u32 get_physaddr_from_sgc(struct esas2r_sg_context *sgc, u64 *addr)
 823 {
 824         u32 len;
 825
 826         if (likely(sgc->cur_offset == sgc->exp_offset)) {
 827                 /*
 828                  * the normal case: caller used all bytes from previous call, so
 829                  * expected offset is the same as the current offset.
 830                  */
 831
 832                 if (sgc->sgel_count < sgc->num_sgel) {
 833                         /* retrieve next segment, except for first time */
 834                         if (sgc->exp_offset > (u8 *)0) {
 835                                 /* advance current segment */
 836                                 sgc->cur_sgel = sg_next(sgc->cur_sgel);
 837                                 ++(sgc->sgel_count);
 838                         }
 839
 840
 841                         len = sg_dma_len(sgc->cur_sgel);
 842                         (*addr) = sg_dma_address(sgc->cur_sgel);
 843
 844                         /* save the total # bytes returned to caller so far */
 845                         sgc->exp_offset += len;
 846
 847                 } else {
 848                         len = 0;
 849                 }
 850         } else if (sgc->cur_offset < sgc->exp_offset) {
 851                 /*
 852                  * caller did not use all bytes from previous call. need to
 853                  * compute the address based on current segment.
 854                  */
 855
 856                 len = sg_dma_len(sgc->cur_sgel);
 857                 (*addr) = sg_dma_address(sgc->cur_sgel);
 858
 859                 sgc->exp_offset -= len;
 860
 861                 /* calculate PA based on prev segment address and offsets */
 862                 *addr = *addr +
 863                         (sgc->cur_offset - sgc->exp_offset);
 864
 865                 sgc->exp_offset += len;
 866
 867                 /* re-calculate length based on offset */
 868                 len = lower_32_bits(
 869                         sgc->exp_offset - sgc->cur_offset);
 870         } else {   /* if ( sgc->cur_offset > sgc->exp_offset ) */
 871                    /*
 872                     * we don't expect the caller to skip ahead.
 873                     * cur_offset will never exceed the len we return
 874                     */
 875                 len = 0;
 876         }
 877
 878         return len;
 879 }
 880
 881 int esas2r_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 882 {
 883         struct esas2r_adapter *a =
 884                 (struct esas2r_adapter *)cmd->device->host->hostdata;
 885         struct esas2r_request *rq;
 886         struct esas2r_sg_context sgc;
 887         unsigned bufflen;
 888
 889         /* Assume success, if it fails we will fix the result later. */
 890         cmd->result = DID_OK << 16;
 891
 892         if (unlikely(a->flags & AF_DEGRADED_MODE)) {
 893                 cmd->result = DID_NO_CONNECT << 16;
 894                 cmd->scsi_done(cmd);
 895                 return 0;
 896         }
 897
 898         rq = esas2r_alloc_request(a);
 899         if (unlikely(rq == NULL)) {
 900                 esas2r_debug("esas2r_alloc_request failed");
 901                 return SCSI_MLQUEUE_HOST_BUSY;
 902         }
 903
 904         rq->cmd = cmd;
 905         bufflen = scsi_bufflen(cmd);
 906
 907         if (likely(bufflen != 0)) {
 908                 if (cmd->sc_data_direction == DMA_TO_DEVICE)
 909                         rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_WRD);
 910                 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
 911                         rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_RDD);
 912         }
 913
 914         memcpy(rq->vrq->scsi.cdb, cmd->cmnd, cmd->cmd_len);
 915         rq->vrq->scsi.length = cpu_to_le32(bufflen);
 916         rq->target_id = cmd->device->id;
 917         rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
 918         rq->sense_buf = cmd->sense_buffer;
 919         rq->sense_len = SCSI_SENSE_BUFFERSIZE;
 920
 921         esas2r_sgc_init(&sgc, a, rq, NULL);
 922
 923         sgc.length = bufflen;
 924         sgc.cur_offset = NULL;
 925
 926         sgc.cur_sgel = scsi_sglist(cmd);
 927         sgc.exp_offset = NULL;
 928         sgc.num_sgel = scsi_dma_map(cmd);
 929         sgc.sgel_count = 0;
 930
 931         if (unlikely(sgc.num_sgel < 0)) {
 932                 esas2r_free_request(a, rq);
 933                 return SCSI_MLQUEUE_HOST_BUSY;
 934         }
 935
 936         sgc.get_phys_addr = (PGETPHYSADDR)get_physaddr_from_sgc;
 937
 938         if (unlikely(!esas2r_build_sg_list(a, rq, &sgc))) {
 939                 scsi_dma_unmap(cmd);
 940                 esas2r_free_request(a, rq);
 941                 return SCSI_MLQUEUE_HOST_BUSY;
 942         }
 943
 944         esas2r_debug("start request %p to %d:%d\n", rq, (int)cmd->device->id,
 945                      (int)cmd->device->lun);
 946
 947         esas2r_start_request(a, rq);
 948
 949         return 0;
 950 }
 951
 952 static void complete_task_management_request(struct esas2r_adapter *a,
 953                                              struct esas2r_request *rq)
 954 {
 955         (*rq->task_management_status_ptr) = rq->req_stat;
 956         esas2r_free_request(a, rq);
 957 }
 958
 959 /**
 960  * Searches the specified queue for the specified queue for the command
 961  * to abort.
 962  *
 963  * @param [in] a
 964  * @param [in] abort_request
 965  * @param [in] cmd
 966  * t
 967  * @return 0 on failure, 1 if command was not found, 2 if command was found
 968  */
 969 static int esas2r_check_active_queue(struct esas2r_adapter *a,
 970                                      struct esas2r_request **abort_request,
 971                                      struct scsi_cmnd *cmd,
 972                                      struct list_head *queue)
 973 {
 974         bool found = false;
 975         struct esas2r_request *ar = *abort_request;
 976         struct esas2r_request *rq;
 977         struct list_head *element, *next;
 978
 979         list_for_each_safe(element, next, queue) {
 980
 981                 rq = list_entry(element, struct esas2r_request, req_list);
 982
 983                 if (rq->cmd == cmd) {
 984
 985                         /* Found the request.  See what to do with it. */
 986                         if (queue == &a->active_list) {
 987                                 /*
 988                                  * We are searching the active queue, which
 989                                  * means that we need to send an abort request
 990                                  * to the firmware.
 991                                  */
 992                                 ar = esas2r_alloc_request(a);
 993                                 if (ar == NULL) {
 994                                         esas2r_log_dev(ESAS2R_LOG_WARN,
 995                                                        &(a->host->shost_gendev),
 996                                                        "unable to allocate an abort request for cmd %p",
 997                                                        cmd);
 998                                         return 0; /* Failure */
 999                                 }
1000
1001                                 /*
1002                                  * Task management request must be formatted
1003                                  * with a lock held.
1004                                  */
1005                                 ar->sense_len = 0;
1006                                 ar->vrq->scsi.length = 0;
1007                                 ar->target_id = rq->target_id;
1008                                 ar->vrq->scsi.flags |= cpu_to_le32(
1009                                         (u8)le32_to_cpu(rq->vrq->scsi.flags));
1010
1011                                 memset(ar->vrq->scsi.cdb, 0,
1012                                        sizeof(ar->vrq->scsi.cdb));
1013
1014                                 ar->vrq->scsi.flags |= cpu_to_le32(
1015                                         FCP_CMND_TRM);
1016                                 ar->vrq->scsi.u.abort_handle =
1017                                         rq->vrq->scsi.handle;
1018                         } else {
1019                                 /*
1020                                  * The request is pending but not active on
1021                                  * the firmware.  Just free it now and we'll
1022                                  * report the successful abort below.
1023                                  */
1024                                 list_del_init(&rq->req_list);
1025                                 esas2r_free_request(a, rq);
1026                         }
1027
1028                         found = true;
1029                         break;
1030                 }
1031
1032         }
1033
1034         if (!found)
1035                 return 1;       /* Not found */
1036
1037         return 2;               /* found */
1038
1039
1040 }
1041
1042 int esas2r_eh_abort(struct scsi_cmnd *cmd)
1043 {
1044         struct esas2r_adapter *a =
1045                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1046         struct esas2r_request *abort_request = NULL;
1047         unsigned long flags;
1048         struct list_head *queue;
1049         int result;
1050
1051         esas2r_log(ESAS2R_LOG_INFO, "eh_abort (%p)", cmd);
1052
1053         if (a->flags & AF_DEGRADED_MODE) {
1054                 cmd->result = DID_ABORT << 16;
1055
1056                 scsi_set_resid(cmd, 0);
1057
1058                 cmd->scsi_done(cmd);
1059
1060                 return 0;
1061         }
1062
1063         spin_lock_irqsave(&a->queue_lock, flags);
1064
1065         /*
1066          * Run through the defer and active queues looking for the request
1067          * to abort.
1068          */
1069
1070         queue = &a->defer_list;
1071
1072 check_active_queue:
1073
1074         result = esas2r_check_active_queue(a, &abort_request, cmd, queue);
1075
1076         if (!result) {
1077                 spin_unlock_irqrestore(&a->queue_lock, flags);
1078                 return FAILED;
1079         } else if (result == 2 && (queue == &a->defer_list)) {
1080                 queue = &a->active_list;
1081                 goto check_active_queue;
1082         }
1083
1084         spin_unlock_irqrestore(&a->queue_lock, flags);
1085
1086         if (abort_request) {
1087                 u8 task_management_status = RS_PENDING;
1088
1089                 /*
1090                  * the request is already active, so we need to tell
1091                  * the firmware to abort it and wait for the response.
1092                  */
1093
1094                 abort_request->comp_cb = complete_task_management_request;
1095                 abort_request->task_management_status_ptr =
1096                         &task_management_status;
1097
1098                 esas2r_start_request(a, abort_request);
1099
1100                 if (atomic_read(&a->disable_cnt) == 0)
1101                         esas2r_do_deferred_processes(a);
1102
1103                 while (task_management_status == RS_PENDING)
1104                         msleep(10);
1105
1106                 /*
1107                  * Once we get here, the original request will have been
1108                  * completed by the firmware and the abort request will have
1109                  * been cleaned up.  we're done!
1110                  */
1111
1112                 return SUCCESS;
1113         }
1114
1115         /*
1116          * If we get here, either we found the inactive request and
1117          * freed it, or we didn't find it at all.  Either way, success!
1118          */
1119
1120         cmd->result = DID_ABORT << 16;
1121
1122         scsi_set_resid(cmd, 0);
1123
1124         cmd->scsi_done(cmd);
1125
1126         return SUCCESS;
1127 }
1128
1129 static int esas2r_host_bus_reset(struct scsi_cmnd *cmd, bool host_reset)
1130 {
1131         struct esas2r_adapter *a =
1132                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1133
1134         if (a->flags & AF_DEGRADED_MODE)
1135                 return FAILED;
1136
1137         if (host_reset)
1138                 esas2r_reset_adapter(a);
1139         else
1140                 esas2r_reset_bus(a);
1141
1142         /* above call sets the AF_OS_RESET flag.  wait for it to clear. */
1143
1144         while (a->flags & AF_OS_RESET) {
1145                 msleep(10);
1146
1147                 if (a->flags & AF_DEGRADED_MODE)
1148                         return FAILED;
1149         }
1150
1151         if (a->flags & AF_DEGRADED_MODE)
1152                 return FAILED;
1153
1154         return SUCCESS;
1155 }
1156
1157 int esas2r_host_reset(struct scsi_cmnd *cmd)
1158 {
1159         esas2r_log(ESAS2R_LOG_INFO, "host_reset (%p)", cmd);
1160
1161         return esas2r_host_bus_reset(cmd, true);
1162 }
1163
1164 int esas2r_bus_reset(struct scsi_cmnd *cmd)
1165 {
1166         esas2r_log(ESAS2R_LOG_INFO, "bus_reset (%p)", cmd);
1167
1168         return esas2r_host_bus_reset(cmd, false);
1169 }
1170
1171 static int esas2r_dev_targ_reset(struct scsi_cmnd *cmd, bool target_reset)
1172 {
1173         struct esas2r_adapter *a =
1174                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1175         struct esas2r_request *rq;
1176         u8 task_management_status = RS_PENDING;
1177         bool completed;
1178
1179         if (a->flags & AF_DEGRADED_MODE)
1180                 return FAILED;
1181
1182 retry:
1183         rq = esas2r_alloc_request(a);
1184         if (rq == NULL) {
1185                 if (target_reset) {
1186                         esas2r_log(ESAS2R_LOG_CRIT,
1187                                    "unable to allocate a request for a "
1188                                    "target reset (%d)!",
1189                                    cmd->device->id);
1190                 } else {
1191                         esas2r_log(ESAS2R_LOG_CRIT,
1192                                    "unable to allocate a request for a "
1193                                    "device reset (%d:%d)!",
1194                                    cmd->device->id,
1195                                    cmd->device->lun);
1196                 }
1197
1198
1199                 return FAILED;
1200         }
1201
1202         rq->target_id = cmd->device->id;
1203         rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
1204         rq->req_stat = RS_PENDING;
1205
1206         rq->comp_cb = complete_task_management_request;
1207         rq->task_management_status_ptr = &task_management_status;
1208
1209         if (target_reset) {
1210                 esas2r_debug("issuing target reset (%p) to id %d", rq,
1211                              cmd->device->id);
1212                 completed = esas2r_send_task_mgmt(a, rq, 0x20);
1213         } else {
1214                 esas2r_debug("issuing device reset (%p) to id %d lun %d", rq,
1215                              cmd->device->id, cmd->device->lun);
1216                 completed = esas2r_send_task_mgmt(a, rq, 0x10);
1217         }
1218
1219         if (completed) {
1220                 /* Task management cmd completed right away, need to free it. */
1221
1222                 esas2r_free_request(a, rq);
1223         } else {
1224                 /*
1225                  * Wait for firmware to complete the request.  Completion
1226                  * callback will free it.
1227                  */
1228                 while (task_management_status == RS_PENDING)
1229                         msleep(10);
1230         }
1231
1232         if (a->flags & AF_DEGRADED_MODE)
1233                 return FAILED;
1234
1235         if (task_management_status == RS_BUSY) {
1236                 /*
1237                  * Busy, probably because we are flashing.  Wait a bit and
1238                  * try again.
1239                  */
1240                 msleep(100);
1241                 goto retry;
1242         }
1243
1244         return SUCCESS;
1245 }
1246
1247 int esas2r_device_reset(struct scsi_cmnd *cmd)
1248 {
1249         esas2r_log(ESAS2R_LOG_INFO, "device_reset (%p)", cmd);
1250
1251         return esas2r_dev_targ_reset(cmd, false);
1252
1253 }
1254
1255 int esas2r_target_reset(struct scsi_cmnd *cmd)
1256 {
1257         esas2r_log(ESAS2R_LOG_INFO, "target_reset (%p)", cmd);
1258
1259         return esas2r_dev_targ_reset(cmd, true);
1260 }
1261
1262 int esas2r_change_queue_depth(struct scsi_device *dev, int depth, int reason)
1263 {
1264         esas2r_log(ESAS2R_LOG_INFO, "change_queue_depth %p, %d", dev, depth);
1265
1266         scsi_adjust_queue_depth(dev, scsi_get_tag_type(dev), depth);
1267
1268         return dev->queue_depth;
1269 }
1270
1271 int esas2r_change_queue_type(struct scsi_device *dev, int type)
1272 {
1273         esas2r_log(ESAS2R_LOG_INFO, "change_queue_type %p, %d", dev, type);
1274
1275         if (dev->tagged_supported) {
1276                 scsi_set_tag_type(dev, type);
1277
1278                 if (type)
1279                         scsi_activate_tcq(dev, dev->queue_depth);
1280                 else
1281                         scsi_deactivate_tcq(dev, dev->queue_depth);
1282         } else {
1283                 type = 0;
1284         }
1285
1286         return type;
1287 }
1288
1289 int esas2r_slave_alloc(struct scsi_device *dev)
1290 {
1291         return 0;
1292 }
1293
1294 int esas2r_slave_configure(struct scsi_device *dev)
1295 {
1296         esas2r_log_dev(ESAS2R_LOG_INFO, &(dev->sdev_gendev),
1297                        "esas2r_slave_configure()");
1298
1299         if (dev->tagged_supported) {
1300                 scsi_set_tag_type(dev, MSG_SIMPLE_TAG);
1301                 scsi_activate_tcq(dev, cmd_per_lun);
1302         } else {
1303                 scsi_set_tag_type(dev, 0);
1304                 scsi_deactivate_tcq(dev, cmd_per_lun);
1305         }
1306
1307         return 0;
1308 }
1309
1310 void esas2r_slave_destroy(struct scsi_device *dev)
1311 {
1312         esas2r_log_dev(ESAS2R_LOG_INFO, &(dev->sdev_gendev),
1313                        "esas2r_slave_destroy()");
1314 }
1315
1316 void esas2r_log_request_failure(struct esas2r_adapter *a,
1317                                 struct esas2r_request *rq)
1318 {
1319         u8 reqstatus = rq->req_stat;
1320
1321         if (reqstatus == RS_SUCCESS)
1322                 return;
1323
1324         if (rq->vrq->scsi.function == VDA_FUNC_SCSI) {
1325                 if (reqstatus == RS_SCSI_ERROR) {
1326                         if (rq->func_rsp.scsi_rsp.sense_len >= 13) {
1327                                 esas2r_log(ESAS2R_LOG_WARN,
1328                                            "request failure - SCSI error %x ASC:%x ASCQ:%x CDB:%x",
1329                                            rq->sense_buf[2], rq->sense_buf[12],
1330                                            rq->sense_buf[13],
1331                                            rq->vrq->scsi.cdb[0]);
1332                         } else {
1333                                 esas2r_log(ESAS2R_LOG_WARN,
1334                                            "request failure - SCSI error CDB:%x\n",
1335                                            rq->vrq->scsi.cdb[0]);
1336                         }
1337                 } else if ((rq->vrq->scsi.cdb[0] != INQUIRY
1338                             && rq->vrq->scsi.cdb[0] != REPORT_LUNS)
1339                            || (reqstatus != RS_SEL
1340                                && reqstatus != RS_SEL2)) {
1341                         if ((reqstatus == RS_UNDERRUN) &&
1342                             (rq->vrq->scsi.cdb[0] == INQUIRY)) {
1343                                 /* Don't log inquiry underruns */
1344                         } else {
1345                                 esas2r_log(ESAS2R_LOG_WARN,
1346                                            "request failure - cdb:%x reqstatus:%d target:%d",
1347                                            rq->vrq->scsi.cdb[0], reqstatus,
1348                                            rq->target_id);
1349                         }
1350                 }
1351         }
1352 }
1353
1354 void esas2r_wait_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1355 {
1356         u32 starttime;
1357         u32 timeout;
1358
1359         starttime = jiffies_to_msecs(jiffies);
1360         timeout = rq->timeout ? rq->timeout : 5000;
1361
1362         while (true) {
1363                 esas2r_polled_interrupt(a);
1364
1365                 if (rq->req_stat != RS_STARTED)
1366                         break;
1367
1368                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1369
1370                 if ((jiffies_to_msecs(jiffies) - starttime) > timeout) {
1371                         esas2r_hdebug("request TMO");
1372                         esas2r_bugon();
1373
1374                         rq->req_stat = RS_TIMEOUT;
1375
1376                         esas2r_local_reset_adapter(a);
1377                         return;
1378                 }
1379         }
1380 }
1381
1382 u32 esas2r_map_data_window(struct esas2r_adapter *a, u32 addr_lo)
1383 {
1384         u32 offset = addr_lo & (MW_DATA_WINDOW_SIZE - 1);
1385         u32 base = addr_lo & -(signed int)MW_DATA_WINDOW_SIZE;
1386
1387         if (a->window_base != base) {
1388                 esas2r_write_register_dword(a, MVR_PCI_WIN1_REMAP,
1389                                             base | MVRPW1R_ENABLE);
1390                 esas2r_flush_register_dword(a, MVR_PCI_WIN1_REMAP);
1391                 a->window_base = base;
1392         }
1393
1394         return offset;
1395 }
1396
1397 /* Read a block of data from chip memory */
1398 bool esas2r_read_mem_block(struct esas2r_adapter *a,
1399                            void *to,
1400                            u32 from,
1401                            u32 size)
1402 {
1403         u8 *end = (u8 *)to;
1404
1405         while (size) {
1406                 u32 len;
1407                 u32 offset;
1408                 u32 iatvr;
1409
1410                 iatvr = (from & -(signed int)MW_DATA_WINDOW_SIZE);
1411
1412                 esas2r_map_data_window(a, iatvr);
1413
1414                 offset = from & (MW_DATA_WINDOW_SIZE - 1);
1415                 len = size;
1416
1417                 if (len > MW_DATA_WINDOW_SIZE - offset)
1418                         len = MW_DATA_WINDOW_SIZE - offset;
1419
1420                 from += len;
1421                 size -= len;
1422
1423                 while (len--) {
1424                         *end++ = esas2r_read_data_byte(a, offset);
1425                         offset++;
1426                 }
1427         }
1428
1429         return true;
1430 }
1431
1432 void esas2r_nuxi_mgt_data(u8 function, void *data)
1433 {
1434         struct atto_vda_grp_info *g;
1435         struct atto_vda_devinfo *d;
1436         struct atto_vdapart_info *p;
1437         struct atto_vda_dh_info *h;
1438         struct atto_vda_metrics_info *m;
1439         struct atto_vda_schedule_info *s;
1440         struct atto_vda_buzzer_info *b;
1441         u8 i;
1442
1443         switch (function) {
1444         case VDAMGT_BUZZER_INFO:
1445         case VDAMGT_BUZZER_SET:
1446
1447                 b = (struct atto_vda_buzzer_info *)data;
1448
1449                 b->duration = le32_to_cpu(b->duration);
1450                 break;
1451
1452         case VDAMGT_SCHEDULE_INFO:
1453         case VDAMGT_SCHEDULE_EVENT:
1454
1455                 s = (struct atto_vda_schedule_info *)data;
1456
1457                 s->id = le32_to_cpu(s->id);
1458
1459                 break;
1460
1461         case VDAMGT_DEV_INFO:
1462         case VDAMGT_DEV_CLEAN:
1463         case VDAMGT_DEV_PT_INFO:
1464         case VDAMGT_DEV_FEATURES:
1465         case VDAMGT_DEV_PT_FEATURES:
1466         case VDAMGT_DEV_OPERATION:
1467
1468                 d = (struct atto_vda_devinfo *)data;
1469
1470                 d->capacity = le64_to_cpu(d->capacity);
1471                 d->block_size = le32_to_cpu(d->block_size);
1472                 d->ses_dev_index = le16_to_cpu(d->ses_dev_index);
1473                 d->target_id = le16_to_cpu(d->target_id);
1474                 d->lun = le16_to_cpu(d->lun);
1475                 d->features = le16_to_cpu(d->features);
1476                 break;
1477
1478         case VDAMGT_GRP_INFO:
1479         case VDAMGT_GRP_CREATE:
1480         case VDAMGT_GRP_DELETE:
1481         case VDAMGT_ADD_STORAGE:
1482         case VDAMGT_MEMBER_ADD:
1483         case VDAMGT_GRP_COMMIT:
1484         case VDAMGT_GRP_REBUILD:
1485         case VDAMGT_GRP_COMMIT_INIT:
1486         case VDAMGT_QUICK_RAID:
1487         case VDAMGT_GRP_FEATURES:
1488         case VDAMGT_GRP_COMMIT_INIT_AUTOMAP:
1489         case VDAMGT_QUICK_RAID_INIT_AUTOMAP:
1490         case VDAMGT_SPARE_LIST:
1491         case VDAMGT_SPARE_ADD:
1492         case VDAMGT_SPARE_REMOVE:
1493         case VDAMGT_LOCAL_SPARE_ADD:
1494         case VDAMGT_GRP_OPERATION:
1495
1496                 g = (struct atto_vda_grp_info *)data;
1497
1498                 g->capacity = le64_to_cpu(g->capacity);
1499                 g->block_size = le32_to_cpu(g->block_size);
1500                 g->interleave = le32_to_cpu(g->interleave);
1501                 g->features = le16_to_cpu(g->features);
1502
1503                 for (i = 0; i < 32; i++)
1504                         g->members[i] = le16_to_cpu(g->members[i]);
1505
1506                 break;
1507
1508         case VDAMGT_PART_INFO:
1509         case VDAMGT_PART_MAP:
1510         case VDAMGT_PART_UNMAP:
1511         case VDAMGT_PART_AUTOMAP:
1512         case VDAMGT_PART_SPLIT:
1513         case VDAMGT_PART_MERGE:
1514
1515                 p = (struct atto_vdapart_info *)data;
1516
1517                 p->part_size = le64_to_cpu(p->part_size);
1518                 p->start_lba = le32_to_cpu(p->start_lba);
1519                 p->block_size = le32_to_cpu(p->block_size);
1520                 p->target_id = le16_to_cpu(p->target_id);
1521                 break;
1522
1523         case VDAMGT_DEV_HEALTH_REQ:
1524
1525                 h = (struct atto_vda_dh_info *)data;
1526
1527                 h->med_defect_cnt = le32_to_cpu(h->med_defect_cnt);
1528                 h->info_exc_cnt = le32_to_cpu(h->info_exc_cnt);
1529                 break;
1530
1531         case VDAMGT_DEV_METRICS:
1532
1533                 m = (struct atto_vda_metrics_info *)data;
1534
1535                 for (i = 0; i < 32; i++)
1536                         m->dev_indexes[i] = le16_to_cpu(m->dev_indexes[i]);
1537
1538                 break;
1539
1540         default:
1541                 break;
1542         }
1543 }
1544
1545 void esas2r_nuxi_cfg_data(u8 function, void *data)
1546 {
1547         struct atto_vda_cfg_init *ci;
1548
1549         switch (function) {
1550         case VDA_CFG_INIT:
1551         case VDA_CFG_GET_INIT:
1552         case VDA_CFG_GET_INIT2:
1553
1554                 ci = (struct atto_vda_cfg_init *)data;
1555
1556                 ci->date_time.year = le16_to_cpu(ci->date_time.year);
1557                 ci->sgl_page_size = le32_to_cpu(ci->sgl_page_size);
1558                 ci->vda_version = le32_to_cpu(ci->vda_version);
1559                 ci->epoch_time = le32_to_cpu(ci->epoch_time);
1560                 ci->ioctl_tunnel = le32_to_cpu(ci->ioctl_tunnel);
1561                 ci->num_targets_backend = le32_to_cpu(ci->num_targets_backend);
1562                 break;
1563
1564         default:
1565                 break;
1566         }
1567 }
1568
1569 void esas2r_nuxi_ae_data(union atto_vda_ae *ae)
1570 {
1571         struct atto_vda_ae_raid *r = &ae->raid;
1572         struct atto_vda_ae_lu *l = &ae->lu;
1573
1574         switch (ae->hdr.bytype) {
1575         case VDAAE_HDR_TYPE_RAID:
1576
1577                 r->dwflags = le32_to_cpu(r->dwflags);
1578                 break;
1579
1580         case VDAAE_HDR_TYPE_LU:
1581
1582                 l->dwevent = le32_to_cpu(l->dwevent);
1583                 l->wphys_target_id = le16_to_cpu(l->wphys_target_id);
1584                 l->id.tgtlun.wtarget_id = le16_to_cpu(l->id.tgtlun.wtarget_id);
1585
1586                 if (l->hdr.bylength >= offsetof(struct atto_vda_ae_lu, id)
1587                     + sizeof(struct atto_vda_ae_lu_tgt_lun_raid)) {
1588                         l->id.tgtlun_raid.dwinterleave
1589                                 = le32_to_cpu(l->id.tgtlun_raid.dwinterleave);
1590                         l->id.tgtlun_raid.dwblock_size
1591                                 = le32_to_cpu(l->id.tgtlun_raid.dwblock_size);
1592                 }
1593
1594                 break;
1595
1596         case VDAAE_HDR_TYPE_DISK:
1597         default:
1598                 break;
1599         }
1600 }
1601
1602 void esas2r_free_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1603 {
1604         unsigned long flags;
1605
1606         esas2r_rq_destroy_request(rq, a);
1607         spin_lock_irqsave(&a->request_lock, flags);
1608         list_add(&rq->comp_list, &a->avail_request);
1609         spin_unlock_irqrestore(&a->request_lock, flags);
1610 }
1611
1612 struct esas2r_request *esas2r_alloc_request(struct esas2r_adapter *a)
1613 {
1614         struct esas2r_request *rq;
1615         unsigned long flags;
1616
1617         spin_lock_irqsave(&a->request_lock, flags);
1618
1619         if (unlikely(list_empty(&a->avail_request))) {
1620                 spin_unlock_irqrestore(&a->request_lock, flags);
1621                 return NULL;
1622         }
1623
1624         rq = list_first_entry(&a->avail_request, struct esas2r_request,
1625                               comp_list);
1626         list_del(&rq->comp_list);
1627         spin_unlock_irqrestore(&a->request_lock, flags);
1628         esas2r_rq_init_request(rq, a);
1629
1630         return rq;
1631
1632 }
1633
1634 void esas2r_complete_request_cb(struct esas2r_adapter *a,
1635                                 struct esas2r_request *rq)
1636 {
1637         esas2r_debug("completing request %p\n", rq);
1638
1639         scsi_dma_unmap(rq->cmd);
1640
1641         if (unlikely(rq->req_stat != RS_SUCCESS)) {
1642                 esas2r_debug("[%x STATUS %x:%x (%x)]", rq->target_id,
1643                              rq->req_stat,
1644                              rq->func_rsp.scsi_rsp.scsi_stat,
1645                              rq->cmd);
1646
1647                 rq->cmd->result =
1648                         ((esas2r_req_status_to_error(rq->req_stat) << 16)
1649                          | (rq->func_rsp.scsi_rsp.scsi_stat & STATUS_MASK));
1650
1651                 if (rq->req_stat == RS_UNDERRUN)
1652                         scsi_set_resid(rq->cmd,
1653                                        le32_to_cpu(rq->func_rsp.scsi_rsp.
1654                                                    residual_length));
1655                 else
1656                         scsi_set_resid(rq->cmd, 0);
1657         }
1658
1659         rq->cmd->scsi_done(rq->cmd);
1660
1661         esas2r_free_request(a, rq);
1662 }
1663
1664 /* Run tasklet to handle stuff outside of interrupt context. */
1665 void esas2r_adapter_tasklet(unsigned long context)
1666 {
1667         struct esas2r_adapter *a = (struct esas2r_adapter *)context;
1668
1669         if (unlikely(a->flags2 & AF2_TIMER_TICK)) {
1670                 esas2r_lock_clear_flags(&a->flags2, AF2_TIMER_TICK);
1671                 esas2r_timer_tick(a);
1672         }
1673
1674         if (likely(a->flags2 & AF2_INT_PENDING)) {
1675                 esas2r_lock_clear_flags(&a->flags2, AF2_INT_PENDING);
1676                 esas2r_adapter_interrupt(a);
1677         }
1678
1679         if (esas2r_is_tasklet_pending(a))
1680                 esas2r_do_tasklet_tasks(a);
1681
1682         if (esas2r_is_tasklet_pending(a)
1683             || (a->flags2 & AF2_INT_PENDING)
1684             || (a->flags2 & AF2_TIMER_TICK)) {
1685                 esas2r_lock_clear_flags(&a->flags, AF_TASKLET_SCHEDULED);
1686                 esas2r_schedule_tasklet(a);
1687         } else {
1688                 esas2r_lock_clear_flags(&a->flags, AF_TASKLET_SCHEDULED);
1689         }
1690 }
1691
1692 static void esas2r_timer_callback(unsigned long context);
1693
1694 void esas2r_kickoff_timer(struct esas2r_adapter *a)
1695 {
1696         init_timer(&a->timer);
1697
1698         a->timer.function = esas2r_timer_callback;
1699         a->timer.data = (unsigned long)a;
1700         a->timer.expires = jiffies +
1701                            msecs_to_jiffies(100);
1702
1703         add_timer(&a->timer);
1704 }
1705
1706 static void esas2r_timer_callback(unsigned long context)
1707 {
1708         struct esas2r_adapter *a = (struct esas2r_adapter *)context;
1709
1710         esas2r_lock_set_flags(&a->flags2, AF2_TIMER_TICK);
1711
1712         esas2r_schedule_tasklet(a);
1713
1714         esas2r_kickoff_timer(a);
1715 }
1716
1717 /*
1718  * Firmware events need to be handled outside of interrupt context
1719  * so we schedule a delayed_work to handle them.
1720  */
1721
1722 static void
1723 esas2r_free_fw_event(struct esas2r_fw_event_work *fw_event)
1724 {
1725         unsigned long flags;
1726         struct esas2r_adapter *a = fw_event->a;
1727
1728         spin_lock_irqsave(&a->fw_event_lock, flags);
1729         list_del(&fw_event->list);
1730         kfree(fw_event);
1731         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1732 }
1733
1734 void
1735 esas2r_fw_event_off(struct esas2r_adapter *a)
1736 {
1737         unsigned long flags;
1738
1739         spin_lock_irqsave(&a->fw_event_lock, flags);
1740         a->fw_events_off = 1;
1741         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1742 }
1743
1744 void
1745 esas2r_fw_event_on(struct esas2r_adapter *a)
1746 {
1747         unsigned long flags;
1748
1749         spin_lock_irqsave(&a->fw_event_lock, flags);
1750         a->fw_events_off = 0;
1751         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1752 }
1753
1754 static void esas2r_add_device(struct esas2r_adapter *a, u16 target_id)
1755 {
1756         int ret;
1757         struct scsi_device *scsi_dev;
1758
1759         scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1760
1761         if (scsi_dev) {
1762                 esas2r_log_dev(
1763                         ESAS2R_LOG_WARN,
1764                         &(scsi_dev->
1765                           sdev_gendev),
1766                         "scsi device already exists at id %d", target_id);
1767
1768                 scsi_device_put(scsi_dev);
1769         } else {
1770                 esas2r_log_dev(
1771                         ESAS2R_LOG_INFO,
1772                         &(a->host->
1773                           shost_gendev),
1774                         "scsi_add_device() called for 0:%d:0",
1775                         target_id);
1776
1777                 ret = scsi_add_device(a->host, 0, target_id, 0);
1778                 if (ret) {
1779                         esas2r_log_dev(
1780                                 ESAS2R_LOG_CRIT,
1781                                 &(a->host->
1782                                   shost_gendev),
1783                                 "scsi_add_device failed with %d for id %d",
1784                                 ret, target_id);
1785                 }
1786         }
1787 }
1788
1789 static void esas2r_remove_device(struct esas2r_adapter *a, u16 target_id)
1790 {
1791         struct scsi_device *scsi_dev;
1792
1793         scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1794
1795         if (scsi_dev) {
1796                 scsi_device_set_state(scsi_dev, SDEV_OFFLINE);
1797
1798                 esas2r_log_dev(
1799                         ESAS2R_LOG_INFO,
1800                         &(scsi_dev->
1801                           sdev_gendev),
1802                         "scsi_remove_device() called for 0:%d:0",
1803                         target_id);
1804
1805                 scsi_remove_device(scsi_dev);
1806
1807                 esas2r_log_dev(
1808                         ESAS2R_LOG_INFO,
1809                         &(scsi_dev->
1810                           sdev_gendev),
1811                         "scsi_device_put() called");
1812
1813                 scsi_device_put(scsi_dev);
1814         } else {
1815                 esas2r_log_dev(
1816                         ESAS2R_LOG_WARN,
1817                         &(a->host->shost_gendev),
1818                         "no target found at id %d",
1819                         target_id);
1820         }
1821 }
1822
1823 /*
1824  * Sends a firmware asynchronous event to anyone who happens to be
1825  * listening on the defined ATTO VDA event ports.
1826  */
1827 static void esas2r_send_ae_event(struct esas2r_fw_event_work *fw_event)
1828 {
1829         struct esas2r_vda_ae *ae = (struct esas2r_vda_ae *)fw_event->data;
1830         char *type;
1831
1832         switch (ae->vda_ae.hdr.bytype) {
1833         case VDAAE_HDR_TYPE_RAID:
1834                 type = "RAID group state change";
1835                 break;
1836
1837         case VDAAE_HDR_TYPE_LU:
1838                 type = "Mapped destination LU change";
1839                 break;
1840
1841         case VDAAE_HDR_TYPE_DISK:
1842                 type = "Physical disk inventory change";
1843                 break;
1844
1845         case VDAAE_HDR_TYPE_RESET:
1846                 type = "Firmware reset";
1847                 break;
1848
1849         case VDAAE_HDR_TYPE_LOG_INFO:
1850                 type = "Event Log message (INFO level)";
1851                 break;
1852
1853         case VDAAE_HDR_TYPE_LOG_WARN:
1854                 type = "Event Log message (WARN level)";
1855                 break;
1856
1857         case VDAAE_HDR_TYPE_LOG_CRIT:
1858                 type = "Event Log message (CRIT level)";
1859                 break;
1860
1861         case VDAAE_HDR_TYPE_LOG_FAIL:
1862                 type = "Event Log message (FAIL level)";
1863                 break;
1864
1865         case VDAAE_HDR_TYPE_NVC:
1866                 type = "NVCache change";
1867                 break;
1868
1869         case VDAAE_HDR_TYPE_TLG_INFO:
1870                 type = "Time stamped log message (INFO level)";
1871                 break;
1872
1873         case VDAAE_HDR_TYPE_TLG_WARN:
1874                 type = "Time stamped log message (WARN level)";
1875                 break;
1876
1877         case VDAAE_HDR_TYPE_TLG_CRIT:
1878                 type = "Time stamped log message (CRIT level)";
1879                 break;
1880
1881         case VDAAE_HDR_TYPE_PWRMGT:
1882                 type = "Power management";
1883                 break;
1884
1885         case VDAAE_HDR_TYPE_MUTE:
1886                 type = "Mute button pressed";
1887                 break;
1888
1889         case VDAAE_HDR_TYPE_DEV:
1890                 type = "Device attribute change";
1891                 break;
1892
1893         default:
1894                 type = "Unknown";
1895                 break;
1896         }
1897
1898         esas2r_log(ESAS2R_LOG_WARN,
1899                    "An async event of type \"%s\" was received from the firmware.  The event contents are:",
1900                    type);
1901         esas2r_log_hexdump(ESAS2R_LOG_WARN, &ae->vda_ae,
1902                            ae->vda_ae.hdr.bylength);
1903
1904 }
1905
1906 static void
1907 esas2r_firmware_event_work(struct work_struct *work)
1908 {
1909         struct esas2r_fw_event_work *fw_event =
1910                 container_of(work, struct esas2r_fw_event_work, work.work);
1911
1912         struct esas2r_adapter *a = fw_event->a;
1913
1914         u16 target_id = *(u16 *)&fw_event->data[0];
1915
1916         if (a->fw_events_off)
1917                 goto done;
1918
1919         switch (fw_event->type) {
1920         case fw_event_null:
1921                 break; /* do nothing */
1922
1923         case fw_event_lun_change:
1924                 esas2r_remove_device(a, target_id);
1925                 esas2r_add_device(a, target_id);
1926                 break;
1927
1928         case fw_event_present:
1929                 esas2r_add_device(a, target_id);
1930                 break;
1931
1932         case fw_event_not_present:
1933                 esas2r_remove_device(a, target_id);
1934                 break;
1935
1936         case fw_event_vda_ae:
1937                 esas2r_send_ae_event(fw_event);
1938                 break;
1939         }
1940
1941 done:
1942         esas2r_free_fw_event(fw_event);
1943 }
1944
1945 void esas2r_queue_fw_event(struct esas2r_adapter *a,
1946                            enum fw_event_type type,
1947                            void *data,
1948                            int data_sz)
1949 {
1950         struct esas2r_fw_event_work *fw_event;
1951         unsigned long flags;
1952
1953         fw_event = kzalloc(sizeof(struct esas2r_fw_event_work), GFP_ATOMIC);
1954         if (!fw_event) {
1955                 esas2r_log(ESAS2R_LOG_WARN,
1956                            "esas2r_queue_fw_event failed to alloc");
1957                 return;
1958         }
1959
1960         if (type == fw_event_vda_ae) {
1961                 struct esas2r_vda_ae *ae =
1962                         (struct esas2r_vda_ae *)fw_event->data;
1963
1964                 ae->signature = ESAS2R_VDA_EVENT_SIG;
1965                 ae->bus_number = a->pcid->bus->number;
1966                 ae->devfn = a->pcid->devfn;
1967                 memcpy(&ae->vda_ae, data, sizeof(ae->vda_ae));
1968         } else {
1969                 memcpy(fw_event->data, data, data_sz);
1970         }
1971
1972         fw_event->type = type;
1973         fw_event->a = a;
1974
1975         spin_lock_irqsave(&a->fw_event_lock, flags);
1976         list_add_tail(&fw_event->list, &a->fw_event_list);
1977         INIT_DELAYED_WORK(&fw_event->work, esas2r_firmware_event_work);
1978         queue_delayed_work_on(
1979                 smp_processor_id(), a->fw_event_q, &fw_event->work,
1980                 msecs_to_jiffies(1));
1981         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1982 }
1983
1984 void esas2r_target_state_changed(struct esas2r_adapter *a, u16 targ_id,
1985                                  u8 state)
1986 {
1987         if (state == TS_LUN_CHANGE)
1988                 esas2r_queue_fw_event(a, fw_event_lun_change, &targ_id,
1989                                       sizeof(targ_id));
1990         else if (state == TS_PRESENT)
1991                 esas2r_queue_fw_event(a, fw_event_present, &targ_id,
1992                                       sizeof(targ_id));
1993         else if (state == TS_NOT_PRESENT)
1994                 esas2r_queue_fw_event(a, fw_event_not_present, &targ_id,
1995                                       sizeof(targ_id));
1996 }
1997
1998 /* Translate status to a Linux SCSI mid-layer error code */
1999 int esas2r_req_status_to_error(u8 req_stat)
2000 {
2001         switch (req_stat) {
2002         case RS_OVERRUN:
2003         case RS_UNDERRUN:
2004         case RS_SUCCESS:
2005         /*
2006          * NOTE: SCSI mid-layer wants a good status for a SCSI error, because
2007          *       it will check the scsi_stat value in the completion anyway.
2008          */
2009         case RS_SCSI_ERROR:
2010                 return DID_OK;
2011
2012         case RS_SEL:
2013         case RS_SEL2:
2014                 return DID_NO_CONNECT;
2015
2016         case RS_RESET:
2017                 return DID_RESET;
2018
2019         case RS_ABORTED:
2020                 return DID_ABORT;
2021
2022         case RS_BUSY:
2023                 return DID_BUS_BUSY;
2024         }
2025
2026         /* everything else is just an error. */
2027
2028         return DID_ERROR;
2029 }
2030
2031 module_init(esas2r_init);
2032 module_exit(esas2r_exit);