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:[email protected])
   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                        const 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                         const 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                        const 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                         const 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                         const 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                          const 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                                const 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                                 const 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                                   const 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                        const 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                         const 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 = kmalloc(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 %zu 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         const struct bin_attribute bin_attr_ ## _name = { \
 215                 .attr   = \
 216                 { .name = __stringify(_name), .mode  = S_IRUSR | S_IWUSR }, \
 217                 .size   = 0, \
 218                 .read_new       = read_ ## _name, \
 219                 .write_new      = 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 const struct bin_attribute bin_attr_default_nvram = {
 228         .attr   = { .name = "default_nvram", .mode = S_IRUGO },
 229         .size   = 0,
 230         .read_new       = read_default_nvram,
 231         .write  = NULL
 232 };
 233
 234 static const struct scsi_host_template driver_template = {
 235         .module                         = THIS_MODULE,
 236         .show_info                      = esas2r_show_info,
 237         .name                           = ESAS2R_LONGNAME,
 238         .info                           = esas2r_info,
 239         .ioctl                          = esas2r_ioctl,
 240         .queuecommand                   = esas2r_queuecommand,
 241         .eh_abort_handler               = esas2r_eh_abort,
 242         .eh_device_reset_handler        = esas2r_device_reset,
 243         .eh_bus_reset_handler           = esas2r_bus_reset,
 244         .eh_host_reset_handler          = esas2r_host_reset,
 245         .eh_target_reset_handler        = esas2r_target_reset,
 246         .can_queue                      = 128,
 247         .this_id                        = -1,
 248         .sg_tablesize                   = SG_CHUNK_SIZE,
 249         .cmd_per_lun                    =
 250                 ESAS2R_DEFAULT_CMD_PER_LUN,
 251         .proc_name                      = ESAS2R_DRVR_NAME,
 252         .change_queue_depth             = scsi_change_queue_depth,
 253         .max_sectors                    = 0xFFFF,
 254 };
 255
 256 int sgl_page_size = 512;
 257 module_param(sgl_page_size, int, 0);
 258 MODULE_PARM_DESC(sgl_page_size,
 259                  "Scatter/gather list (SGL) page size in number of S/G "
 260                  "entries.  If your application is doing a lot of very large "
 261                  "transfers, you may want to increase the SGL page size.  "
 262                  "Default 512.");
 263
 264 int num_sg_lists = 1024;
 265 module_param(num_sg_lists, int, 0);
 266 MODULE_PARM_DESC(num_sg_lists,
 267                  "Number of scatter/gather lists.  Default 1024.");
 268
 269 int sg_tablesize = SG_CHUNK_SIZE;
 270 module_param(sg_tablesize, int, 0);
 271 MODULE_PARM_DESC(sg_tablesize,
 272                  "Maximum number of entries in a scatter/gather table.");
 273
 274 int num_requests = 256;
 275 module_param(num_requests, int, 0);
 276 MODULE_PARM_DESC(num_requests,
 277                  "Number of requests.  Default 256.");
 278
 279 int num_ae_requests = 4;
 280 module_param(num_ae_requests, int, 0);
 281 MODULE_PARM_DESC(num_ae_requests,
 282                  "Number of VDA asynchronous event requests.  Default 4.");
 283
 284 int cmd_per_lun = ESAS2R_DEFAULT_CMD_PER_LUN;
 285 module_param(cmd_per_lun, int, 0);
 286 MODULE_PARM_DESC(cmd_per_lun,
 287                  "Maximum number of commands per LUN.  Default "
 288                  DEFINED_NUM_TO_STR(ESAS2R_DEFAULT_CMD_PER_LUN) ".");
 289
 290 int can_queue = 128;
 291 module_param(can_queue, int, 0);
 292 MODULE_PARM_DESC(can_queue,
 293                  "Maximum number of commands per adapter.  Default 128.");
 294
 295 int esas2r_max_sectors = 0xFFFF;
 296 module_param(esas2r_max_sectors, int, 0);
 297 MODULE_PARM_DESC(esas2r_max_sectors,
 298                  "Maximum number of disk sectors in a single data transfer.  "
 299                  "Default 65535 (largest possible setting).");
 300
 301 int interrupt_mode = 1;
 302 module_param(interrupt_mode, int, 0);
 303 MODULE_PARM_DESC(interrupt_mode,
 304                  "Defines the interrupt mode to use.  0 for legacy"
 305                  ", 1 for MSI.  Default is MSI (1).");
 306
 307 static const struct pci_device_id
 308         esas2r_pci_table[] = {
 309         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x0049,
 310           0,
 311           0, 0 },
 312         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004A,
 313           0,
 314           0, 0 },
 315         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004B,
 316           0,
 317           0, 0 },
 318         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004C,
 319           0,
 320           0, 0 },
 321         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004D,
 322           0,
 323           0, 0 },
 324         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004E,
 325           0,
 326           0, 0 },
 327         { 0,              0,              0,              0,
 328           0,
 329           0, 0 }
 330 };
 331
 332 MODULE_DEVICE_TABLE(pci, esas2r_pci_table);
 333
 334 static int
 335 esas2r_probe(struct pci_dev *pcid, const struct pci_device_id *id);
 336
 337 static void
 338 esas2r_remove(struct pci_dev *pcid);
 339
 340 static struct pci_driver
 341         esas2r_pci_driver = {
 342         .name           = ESAS2R_DRVR_NAME,
 343         .id_table       = esas2r_pci_table,
 344         .probe          = esas2r_probe,
 345         .remove         = esas2r_remove,
 346         .driver.pm      = &esas2r_pm_ops,
 347 };
 348
 349 static int esas2r_probe(struct pci_dev *pcid,
 350                         const struct pci_device_id *id)
 351 {
 352         struct Scsi_Host *host = NULL;
 353         struct esas2r_adapter *a;
 354         int err;
 355
 356         size_t host_alloc_size = sizeof(struct esas2r_adapter)
 357                                  + ((num_requests) +
 358                                     1) * sizeof(struct esas2r_request);
 359
 360         esas2r_log_dev(ESAS2R_LOG_DEBG, &(pcid->dev),
 361                        "esas2r_probe() 0x%02x 0x%02x 0x%02x 0x%02x",
 362                        pcid->vendor,
 363                        pcid->device,
 364                        pcid->subsystem_vendor,
 365                        pcid->subsystem_device);
 366
 367         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 368                        "before pci_enable_device() "
 369                        "enable_cnt: %d",
 370                        pcid->enable_cnt.counter);
 371
 372         err = pci_enable_device(pcid);
 373         if (err != 0) {
 374                 esas2r_log_dev(ESAS2R_LOG_CRIT, &(pcid->dev),
 375                                "pci_enable_device() FAIL (%d)",
 376                                err);
 377                 return -ENODEV;
 378         }
 379
 380         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 381                        "pci_enable_device() OK");
 382         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 383                        "after pci_enable_device() enable_cnt: %d",
 384                        pcid->enable_cnt.counter);
 385
 386         host = scsi_host_alloc(&driver_template, host_alloc_size);
 387         if (host == NULL) {
 388                 esas2r_log(ESAS2R_LOG_CRIT, "scsi_host_alloc() FAIL");
 389                 return -ENODEV;
 390         }
 391
 392         memset(host->hostdata, 0, host_alloc_size);
 393
 394         a = (struct esas2r_adapter *)host->hostdata;
 395
 396         esas2r_log(ESAS2R_LOG_INFO, "scsi_host_alloc() OK host: %p", host);
 397
 398         /* override max LUN and max target id */
 399
 400         host->max_id = ESAS2R_MAX_ID + 1;
 401         host->max_lun = 255;
 402
 403         /* we can handle 16-byte CDbs */
 404
 405         host->max_cmd_len = 16;
 406
 407         host->can_queue = can_queue;
 408         host->cmd_per_lun = cmd_per_lun;
 409         host->this_id = host->max_id + 1;
 410         host->max_channel = 0;
 411         host->unique_id = found_adapters;
 412         host->sg_tablesize = sg_tablesize;
 413         host->max_sectors = esas2r_max_sectors;
 414
 415         /* set to bus master for BIOses that don't do it for us */
 416
 417         esas2r_log(ESAS2R_LOG_INFO, "pci_set_master() called");
 418
 419         pci_set_master(pcid);
 420
 421         if (!esas2r_init_adapter(host, pcid, found_adapters)) {
 422                 esas2r_log(ESAS2R_LOG_CRIT,
 423                            "unable to initialize device at PCI bus %x:%x",
 424                            pcid->bus->number,
 425                            pcid->devfn);
 426
 427                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 428                                "scsi_host_put() called");
 429
 430                 scsi_host_put(host);
 431
 432                 return 0;
 433
 434         }
 435
 436         esas2r_log(ESAS2R_LOG_INFO, "pci_set_drvdata(%p, %p) called", pcid,
 437                    host->hostdata);
 438
 439         pci_set_drvdata(pcid, host);
 440
 441         esas2r_log(ESAS2R_LOG_INFO, "scsi_add_host() called");
 442
 443         err = scsi_add_host(host, &pcid->dev);
 444
 445         if (err) {
 446                 esas2r_log(ESAS2R_LOG_CRIT, "scsi_add_host returned %d", err);
 447                 esas2r_log_dev(ESAS2R_LOG_CRIT, &(host->shost_gendev),
 448                                "scsi_add_host() FAIL");
 449
 450                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 451                                "scsi_host_put() called");
 452
 453                 scsi_host_put(host);
 454
 455                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 456                                "pci_set_drvdata(%p, NULL) called",
 457                                pcid);
 458
 459                 pci_set_drvdata(pcid, NULL);
 460
 461                 return -ENODEV;
 462         }
 463
 464
 465         esas2r_fw_event_on(a);
 466
 467         esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 468                        "scsi_scan_host() called");
 469
 470         scsi_scan_host(host);
 471
 472         /* Add sysfs binary files */
 473         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fw))
 474                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 475                                "Failed to create sysfs binary file: fw");
 476         else
 477                 a->sysfs_fw_created = 1;
 478
 479         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fs))
 480                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 481                                "Failed to create sysfs binary file: fs");
 482         else
 483                 a->sysfs_fs_created = 1;
 484
 485         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_vda))
 486                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 487                                "Failed to create sysfs binary file: vda");
 488         else
 489                 a->sysfs_vda_created = 1;
 490
 491         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_hw))
 492                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 493                                "Failed to create sysfs binary file: hw");
 494         else
 495                 a->sysfs_hw_created = 1;
 496
 497         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_live_nvram))
 498                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 499                                "Failed to create sysfs binary file: live_nvram");
 500         else
 501                 a->sysfs_live_nvram_created = 1;
 502
 503         if (sysfs_create_bin_file(&host->shost_dev.kobj,
 504                                   &bin_attr_default_nvram))
 505                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 506                                "Failed to create sysfs binary file: default_nvram");
 507         else
 508                 a->sysfs_default_nvram_created = 1;
 509
 510         found_adapters++;
 511
 512         return 0;
 513 }
 514
 515 static void esas2r_remove(struct pci_dev *pdev)
 516 {
 517         struct Scsi_Host *host = pci_get_drvdata(pdev);
 518         struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
 519
 520         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 521                        "esas2r_remove(%p) called; "
 522                        "host:%p", pdev,
 523                        host);
 524
 525         esas2r_kill_adapter(a->index);
 526         found_adapters--;
 527 }
 528
 529 static int __init esas2r_init(void)
 530 {
 531         int i;
 532
 533         esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
 534
 535         /* verify valid parameters */
 536
 537         if (can_queue < 1) {
 538                 esas2r_log(ESAS2R_LOG_WARN,
 539                            "warning: can_queue must be at least 1, value "
 540                            "forced.");
 541                 can_queue = 1;
 542         } else if (can_queue > 2048) {
 543                 esas2r_log(ESAS2R_LOG_WARN,
 544                            "warning: can_queue must be no larger than 2048, "
 545                            "value forced.");
 546                 can_queue = 2048;
 547         }
 548
 549         if (cmd_per_lun < 1) {
 550                 esas2r_log(ESAS2R_LOG_WARN,
 551                            "warning: cmd_per_lun must be at least 1, value "
 552                            "forced.");
 553                 cmd_per_lun = 1;
 554         } else if (cmd_per_lun > 2048) {
 555                 esas2r_log(ESAS2R_LOG_WARN,
 556                            "warning: cmd_per_lun must be no larger than "
 557                            "2048, value forced.");
 558                 cmd_per_lun = 2048;
 559         }
 560
 561         if (sg_tablesize < 32) {
 562                 esas2r_log(ESAS2R_LOG_WARN,
 563                            "warning: sg_tablesize must be at least 32, "
 564                            "value forced.");
 565                 sg_tablesize = 32;
 566         }
 567
 568         if (esas2r_max_sectors < 1) {
 569                 esas2r_log(ESAS2R_LOG_WARN,
 570                            "warning: esas2r_max_sectors must be at least "
 571                            "1, value forced.");
 572                 esas2r_max_sectors = 1;
 573         } else if (esas2r_max_sectors > 0xffff) {
 574                 esas2r_log(ESAS2R_LOG_WARN,
 575                            "warning: esas2r_max_sectors must be no larger "
 576                            "than 0xffff, value forced.");
 577                 esas2r_max_sectors = 0xffff;
 578         }
 579
 580         sgl_page_size &= ~(ESAS2R_SGL_ALIGN - 1);
 581
 582         if (sgl_page_size < SGL_PG_SZ_MIN)
 583                 sgl_page_size = SGL_PG_SZ_MIN;
 584         else if (sgl_page_size > SGL_PG_SZ_MAX)
 585                 sgl_page_size = SGL_PG_SZ_MAX;
 586
 587         if (num_sg_lists < NUM_SGL_MIN)
 588                 num_sg_lists = NUM_SGL_MIN;
 589         else if (num_sg_lists > NUM_SGL_MAX)
 590                 num_sg_lists = NUM_SGL_MAX;
 591
 592         if (num_requests < NUM_REQ_MIN)
 593                 num_requests = NUM_REQ_MIN;
 594         else if (num_requests > NUM_REQ_MAX)
 595                 num_requests = NUM_REQ_MAX;
 596
 597         if (num_ae_requests < NUM_AE_MIN)
 598                 num_ae_requests = NUM_AE_MIN;
 599         else if (num_ae_requests > NUM_AE_MAX)
 600                 num_ae_requests = NUM_AE_MAX;
 601
 602         /* set up other globals */
 603
 604         for (i = 0; i < MAX_ADAPTERS; i++)
 605                 esas2r_adapters[i] = NULL;
 606
 607         return pci_register_driver(&esas2r_pci_driver);
 608 }
 609
 610 /* Handle ioctl calls to "/proc/scsi/esas2r/ATTOnode" */
 611 static const struct file_operations esas2r_proc_fops = {
 612         .compat_ioctl   = compat_ptr_ioctl,
 613         .unlocked_ioctl = esas2r_proc_ioctl,
 614 };
 615
 616 static const struct proc_ops esas2r_proc_ops = {
 617         .proc_lseek             = default_llseek,
 618         .proc_ioctl             = esas2r_proc_ioctl,
 619 #ifdef CONFIG_COMPAT
 620         .proc_compat_ioctl      = compat_ptr_ioctl,
 621 #endif
 622 };
 623
 624 static struct Scsi_Host *esas2r_proc_host;
 625 static int esas2r_proc_major;
 626
 627 long esas2r_proc_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
 628 {
 629         return esas2r_ioctl_handler(esas2r_proc_host->hostdata,
 630                                     cmd, (void __user *)arg);
 631 }
 632
 633 static void __exit esas2r_exit(void)
 634 {
 635         esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
 636
 637         if (esas2r_proc_major > 0) {
 638                 struct proc_dir_entry *proc_dir;
 639
 640                 esas2r_log(ESAS2R_LOG_INFO, "unregister proc");
 641
 642                 proc_dir = scsi_template_proc_dir(esas2r_proc_host->hostt);
 643                 if (proc_dir)
 644                         remove_proc_entry(ATTONODE_NAME, proc_dir);
 645                 unregister_chrdev(esas2r_proc_major, ESAS2R_DRVR_NAME);
 646
 647                 esas2r_proc_major = 0;
 648         }
 649
 650         esas2r_log(ESAS2R_LOG_INFO, "pci_unregister_driver() called");
 651
 652         pci_unregister_driver(&esas2r_pci_driver);
 653 }
 654
 655 int esas2r_show_info(struct seq_file *m, struct Scsi_Host *sh)
 656 {
 657         struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
 658
 659         struct esas2r_target *t;
 660         int dev_count = 0;
 661
 662         esas2r_log(ESAS2R_LOG_DEBG, "esas2r_show_info (%p,%d)", m, sh->host_no);
 663
 664         seq_printf(m, ESAS2R_LONGNAME "\n"
 665                    "Driver version: "ESAS2R_VERSION_STR "\n"
 666                    "Flash version: %s\n"
 667                    "Firmware version: %s\n"
 668                    "Copyright "ESAS2R_COPYRIGHT_YEARS "\n"
 669                    "http://www.attotech.com\n"
 670                    "\n",
 671                    a->flash_rev,
 672                    a->fw_rev[0] ? a->fw_rev : "(none)");
 673
 674
 675         seq_printf(m, "Adapter information:\n"
 676                    "--------------------\n"
 677                    "Model: %s\n"
 678                    "SAS address: %02X%02X%02X%02X:%02X%02X%02X%02X\n",
 679                    esas2r_get_model_name(a),
 680                    a->nvram->sas_addr[0],
 681                    a->nvram->sas_addr[1],
 682                    a->nvram->sas_addr[2],
 683                    a->nvram->sas_addr[3],
 684                    a->nvram->sas_addr[4],
 685                    a->nvram->sas_addr[5],
 686                    a->nvram->sas_addr[6],
 687                    a->nvram->sas_addr[7]);
 688
 689         seq_puts(m, "\n"
 690                    "Discovered devices:\n"
 691                    "\n"
 692                    "   #  Target ID\n"
 693                    "---------------\n");
 694
 695         for (t = a->targetdb; t < a->targetdb_end; t++)
 696                 if (t->buffered_target_state == TS_PRESENT) {
 697                         seq_printf(m, " %3d   %3d\n",
 698                                    ++dev_count,
 699                                    (u16)(uintptr_t)(t - a->targetdb));
 700                 }
 701
 702         if (dev_count == 0)
 703                 seq_puts(m, "none\n");
 704
 705         seq_putc(m, '\n');
 706         return 0;
 707
 708 }
 709
 710 const char *esas2r_info(struct Scsi_Host *sh)
 711 {
 712         struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
 713         static char esas2r_info_str[512];
 714
 715         esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
 716                        "esas2r_info() called");
 717
 718         /*
 719          * if we haven't done so already, register as a char driver
 720          * and stick a node under "/proc/scsi/esas2r/ATTOnode"
 721          */
 722
 723         if (esas2r_proc_major <= 0) {
 724                 esas2r_proc_host = sh;
 725
 726                 esas2r_proc_major = register_chrdev(0, ESAS2R_DRVR_NAME,
 727                                                     &esas2r_proc_fops);
 728
 729                 esas2r_log_dev(ESAS2R_LOG_DEBG, &(sh->shost_gendev),
 730                                "register_chrdev (major %d)",
 731                                esas2r_proc_major);
 732
 733                 if (esas2r_proc_major > 0) {
 734                         struct proc_dir_entry *proc_dir;
 735                         struct proc_dir_entry *pde = NULL;
 736
 737                         proc_dir = scsi_template_proc_dir(sh->hostt);
 738                         if (proc_dir)
 739                                 pde = proc_create(ATTONODE_NAME, 0, proc_dir,
 740                                                   &esas2r_proc_ops);
 741
 742                         if (!pde) {
 743                                 esas2r_log_dev(ESAS2R_LOG_WARN,
 744                                                &(sh->shost_gendev),
 745                                                "failed to create_proc_entry");
 746                                 esas2r_proc_major = -1;
 747                         }
 748                 }
 749         }
 750
 751         sprintf(esas2r_info_str,
 752                 ESAS2R_LONGNAME " (bus 0x%02X, device 0x%02X, IRQ 0x%02X)"
 753                 " driver version: "ESAS2R_VERSION_STR "  firmware version: "
 754                 "%s\n",
 755                 a->pcid->bus->number, a->pcid->devfn, a->pcid->irq,
 756                 a->fw_rev[0] ? a->fw_rev : "(none)");
 757
 758         return esas2r_info_str;
 759 }
 760
 761 /* Callback for building a request scatter/gather list */
 762 static u32 get_physaddr_from_sgc(struct esas2r_sg_context *sgc, u64 *addr)
 763 {
 764         u32 len;
 765
 766         if (likely(sgc->cur_offset == sgc->exp_offset)) {
 767                 /*
 768                  * the normal case: caller used all bytes from previous call, so
 769                  * expected offset is the same as the current offset.
 770                  */
 771
 772                 if (sgc->sgel_count < sgc->num_sgel) {
 773                         /* retrieve next segment, except for first time */
 774                         if (sgc->exp_offset > (u8 *)0) {
 775                                 /* advance current segment */
 776                                 sgc->cur_sgel = sg_next(sgc->cur_sgel);
 777                                 ++(sgc->sgel_count);
 778                         }
 779
 780
 781                         len = sg_dma_len(sgc->cur_sgel);
 782                         (*addr) = sg_dma_address(sgc->cur_sgel);
 783
 784                         /* save the total # bytes returned to caller so far */
 785                         sgc->exp_offset += len;
 786
 787                 } else {
 788                         len = 0;
 789                 }
 790         } else if (sgc->cur_offset < sgc->exp_offset) {
 791                 /*
 792                  * caller did not use all bytes from previous call. need to
 793                  * compute the address based on current segment.
 794                  */
 795
 796                 len = sg_dma_len(sgc->cur_sgel);
 797                 (*addr) = sg_dma_address(sgc->cur_sgel);
 798
 799                 sgc->exp_offset -= len;
 800
 801                 /* calculate PA based on prev segment address and offsets */
 802                 *addr = *addr +
 803                         (sgc->cur_offset - sgc->exp_offset);
 804
 805                 sgc->exp_offset += len;
 806
 807                 /* re-calculate length based on offset */
 808                 len = lower_32_bits(
 809                         sgc->exp_offset - sgc->cur_offset);
 810         } else {   /* if ( sgc->cur_offset > sgc->exp_offset ) */
 811                    /*
 812                     * we don't expect the caller to skip ahead.
 813                     * cur_offset will never exceed the len we return
 814                     */
 815                 len = 0;
 816         }
 817
 818         return len;
 819 }
 820
 821 int esas2r_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 822 {
 823         struct esas2r_adapter *a =
 824                 (struct esas2r_adapter *)cmd->device->host->hostdata;
 825         struct esas2r_request *rq;
 826         struct esas2r_sg_context sgc;
 827         unsigned bufflen;
 828
 829         /* Assume success, if it fails we will fix the result later. */
 830         cmd->result = DID_OK << 16;
 831
 832         if (unlikely(test_bit(AF_DEGRADED_MODE, &a->flags))) {
 833                 cmd->result = DID_NO_CONNECT << 16;
 834                 scsi_done(cmd);
 835                 return 0;
 836         }
 837
 838         rq = esas2r_alloc_request(a);
 839         if (unlikely(rq == NULL)) {
 840                 esas2r_debug("esas2r_alloc_request failed");
 841                 return SCSI_MLQUEUE_HOST_BUSY;
 842         }
 843
 844         rq->cmd = cmd;
 845         bufflen = scsi_bufflen(cmd);
 846
 847         if (likely(bufflen != 0)) {
 848                 if (cmd->sc_data_direction == DMA_TO_DEVICE)
 849                         rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_WRD);
 850                 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
 851                         rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_RDD);
 852         }
 853
 854         memcpy(rq->vrq->scsi.cdb, cmd->cmnd, cmd->cmd_len);
 855         rq->vrq->scsi.length = cpu_to_le32(bufflen);
 856         rq->target_id = cmd->device->id;
 857         rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
 858         rq->sense_buf = cmd->sense_buffer;
 859         rq->sense_len = SCSI_SENSE_BUFFERSIZE;
 860
 861         esas2r_sgc_init(&sgc, a, rq, NULL);
 862
 863         sgc.length = bufflen;
 864         sgc.cur_offset = NULL;
 865
 866         sgc.cur_sgel = scsi_sglist(cmd);
 867         sgc.exp_offset = NULL;
 868         sgc.num_sgel = scsi_dma_map(cmd);
 869         sgc.sgel_count = 0;
 870
 871         if (unlikely(sgc.num_sgel < 0)) {
 872                 esas2r_free_request(a, rq);
 873                 return SCSI_MLQUEUE_HOST_BUSY;
 874         }
 875
 876         sgc.get_phys_addr = (PGETPHYSADDR)get_physaddr_from_sgc;
 877
 878         if (unlikely(!esas2r_build_sg_list(a, rq, &sgc))) {
 879                 scsi_dma_unmap(cmd);
 880                 esas2r_free_request(a, rq);
 881                 return SCSI_MLQUEUE_HOST_BUSY;
 882         }
 883
 884         esas2r_debug("start request %p to %d:%d\n", rq, (int)cmd->device->id,
 885                      (int)cmd->device->lun);
 886
 887         esas2r_start_request(a, rq);
 888
 889         return 0;
 890 }
 891
 892 static void complete_task_management_request(struct esas2r_adapter *a,
 893                                              struct esas2r_request *rq)
 894 {
 895         (*rq->task_management_status_ptr) = rq->req_stat;
 896         esas2r_free_request(a, rq);
 897 }
 898
 899 /*
 900  * Searches the specified queue for the specified queue for the command
 901  * to abort.
 902  *
 903  * Return 0 on failure, 1 if command was not found, 2 if command was found
 904  */
 905 static int esas2r_check_active_queue(struct esas2r_adapter *a,
 906                                      struct esas2r_request **abort_request,
 907                                      struct scsi_cmnd *cmd,
 908                                      struct list_head *queue)
 909 {
 910         bool found = false;
 911         struct esas2r_request *ar = *abort_request;
 912         struct esas2r_request *rq;
 913         struct list_head *element, *next;
 914
 915         list_for_each_safe(element, next, queue) {
 916
 917                 rq = list_entry(element, struct esas2r_request, req_list);
 918
 919                 if (rq->cmd == cmd) {
 920
 921                         /* Found the request.  See what to do with it. */
 922                         if (queue == &a->active_list) {
 923                                 /*
 924                                  * We are searching the active queue, which
 925                                  * means that we need to send an abort request
 926                                  * to the firmware.
 927                                  */
 928                                 ar = esas2r_alloc_request(a);
 929                                 if (ar == NULL) {
 930                                         esas2r_log_dev(ESAS2R_LOG_WARN,
 931                                                        &(a->host->shost_gendev),
 932                                                        "unable to allocate an abort request for cmd %p",
 933                                                        cmd);
 934                                         return 0; /* Failure */
 935                                 }
 936
 937                                 /*
 938                                  * Task management request must be formatted
 939                                  * with a lock held.
 940                                  */
 941                                 ar->sense_len = 0;
 942                                 ar->vrq->scsi.length = 0;
 943                                 ar->target_id = rq->target_id;
 944                                 ar->vrq->scsi.flags |= cpu_to_le32(
 945                                         (u8)le32_to_cpu(rq->vrq->scsi.flags));
 946
 947                                 memset(ar->vrq->scsi.cdb, 0,
 948                                        sizeof(ar->vrq->scsi.cdb));
 949
 950                                 ar->vrq->scsi.flags |= cpu_to_le32(
 951                                         FCP_CMND_TRM);
 952                                 ar->vrq->scsi.u.abort_handle =
 953                                         rq->vrq->scsi.handle;
 954                         } else {
 955                                 /*
 956                                  * The request is pending but not active on
 957                                  * the firmware.  Just free it now and we'll
 958                                  * report the successful abort below.
 959                                  */
 960                                 list_del_init(&rq->req_list);
 961                                 esas2r_free_request(a, rq);
 962                         }
 963
 964                         found = true;
 965                         break;
 966                 }
 967
 968         }
 969
 970         if (!found)
 971                 return 1;       /* Not found */
 972
 973         return 2;               /* found */
 974
 975
 976 }
 977
 978 int esas2r_eh_abort(struct scsi_cmnd *cmd)
 979 {
 980         struct esas2r_adapter *a =
 981                 (struct esas2r_adapter *)cmd->device->host->hostdata;
 982         struct esas2r_request *abort_request = NULL;
 983         unsigned long flags;
 984         struct list_head *queue;
 985         int result;
 986
 987         esas2r_log(ESAS2R_LOG_INFO, "eh_abort (%p)", cmd);
 988
 989         if (test_bit(AF_DEGRADED_MODE, &a->flags)) {
 990                 cmd->result = DID_ABORT << 16;
 991
 992                 scsi_set_resid(cmd, 0);
 993
 994                 scsi_done(cmd);
 995
 996                 return SUCCESS;
 997         }
 998
 999         spin_lock_irqsave(&a->queue_lock, flags);
1000
1001         /*
1002          * Run through the defer and active queues looking for the request
1003          * to abort.
1004          */
1005
1006         queue = &a->defer_list;
1007
1008 check_active_queue:
1009
1010         result = esas2r_check_active_queue(a, &abort_request, cmd, queue);
1011
1012         if (!result) {
1013                 spin_unlock_irqrestore(&a->queue_lock, flags);
1014                 return FAILED;
1015         } else if (result == 2 && (queue == &a->defer_list)) {
1016                 queue = &a->active_list;
1017                 goto check_active_queue;
1018         }
1019
1020         spin_unlock_irqrestore(&a->queue_lock, flags);
1021
1022         if (abort_request) {
1023                 u8 task_management_status = RS_PENDING;
1024
1025                 /*
1026                  * the request is already active, so we need to tell
1027                  * the firmware to abort it and wait for the response.
1028                  */
1029
1030                 abort_request->comp_cb = complete_task_management_request;
1031                 abort_request->task_management_status_ptr =
1032                         &task_management_status;
1033
1034                 esas2r_start_request(a, abort_request);
1035
1036                 if (atomic_read(&a->disable_cnt) == 0)
1037                         esas2r_do_deferred_processes(a);
1038
1039                 while (task_management_status == RS_PENDING)
1040                         msleep(10);
1041
1042                 /*
1043                  * Once we get here, the original request will have been
1044                  * completed by the firmware and the abort request will have
1045                  * been cleaned up.  we're done!
1046                  */
1047
1048                 return SUCCESS;
1049         }
1050
1051         /*
1052          * If we get here, either we found the inactive request and
1053          * freed it, or we didn't find it at all.  Either way, success!
1054          */
1055
1056         cmd->result = DID_ABORT << 16;
1057
1058         scsi_set_resid(cmd, 0);
1059
1060         scsi_done(cmd);
1061
1062         return SUCCESS;
1063 }
1064
1065 static int esas2r_host_bus_reset(struct scsi_cmnd *cmd, bool host_reset)
1066 {
1067         struct esas2r_adapter *a =
1068                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1069
1070         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1071                 return FAILED;
1072
1073         if (host_reset)
1074                 esas2r_reset_adapter(a);
1075         else
1076                 esas2r_reset_bus(a);
1077
1078         /* above call sets the AF_OS_RESET flag.  wait for it to clear. */
1079
1080         while (test_bit(AF_OS_RESET, &a->flags)) {
1081                 msleep(10);
1082
1083                 if (test_bit(AF_DEGRADED_MODE, &a->flags))
1084                         return FAILED;
1085         }
1086
1087         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1088                 return FAILED;
1089
1090         return SUCCESS;
1091 }
1092
1093 int esas2r_host_reset(struct scsi_cmnd *cmd)
1094 {
1095         esas2r_log(ESAS2R_LOG_INFO, "host_reset (%p)", cmd);
1096
1097         return esas2r_host_bus_reset(cmd, true);
1098 }
1099
1100 int esas2r_bus_reset(struct scsi_cmnd *cmd)
1101 {
1102         esas2r_log(ESAS2R_LOG_INFO, "bus_reset (%p)", cmd);
1103
1104         return esas2r_host_bus_reset(cmd, false);
1105 }
1106
1107 static int esas2r_dev_targ_reset(struct scsi_cmnd *cmd, bool target_reset)
1108 {
1109         struct esas2r_adapter *a =
1110                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1111         struct esas2r_request *rq;
1112         u8 task_management_status = RS_PENDING;
1113         bool completed;
1114
1115         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1116                 return FAILED;
1117
1118 retry:
1119         rq = esas2r_alloc_request(a);
1120         if (rq == NULL) {
1121                 if (target_reset) {
1122                         esas2r_log(ESAS2R_LOG_CRIT,
1123                                    "unable to allocate a request for a "
1124                                    "target reset (%d)!",
1125                                    cmd->device->id);
1126                 } else {
1127                         esas2r_log(ESAS2R_LOG_CRIT,
1128                                    "unable to allocate a request for a "
1129                                    "device reset (%d:%llu)!",
1130                                    cmd->device->id,
1131                                    cmd->device->lun);
1132                 }
1133
1134
1135                 return FAILED;
1136         }
1137
1138         rq->target_id = cmd->device->id;
1139         rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
1140         rq->req_stat = RS_PENDING;
1141
1142         rq->comp_cb = complete_task_management_request;
1143         rq->task_management_status_ptr = &task_management_status;
1144
1145         if (target_reset) {
1146                 esas2r_debug("issuing target reset (%p) to id %d", rq,
1147                              cmd->device->id);
1148                 completed = esas2r_send_task_mgmt(a, rq, 0x20);
1149         } else {
1150                 esas2r_debug("issuing device reset (%p) to id %d lun %d", rq,
1151                              cmd->device->id, cmd->device->lun);
1152                 completed = esas2r_send_task_mgmt(a, rq, 0x10);
1153         }
1154
1155         if (completed) {
1156                 /* Task management cmd completed right away, need to free it. */
1157
1158                 esas2r_free_request(a, rq);
1159         } else {
1160                 /*
1161                  * Wait for firmware to complete the request.  Completion
1162                  * callback will free it.
1163                  */
1164                 while (task_management_status == RS_PENDING)
1165                         msleep(10);
1166         }
1167
1168         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1169                 return FAILED;
1170
1171         if (task_management_status == RS_BUSY) {
1172                 /*
1173                  * Busy, probably because we are flashing.  Wait a bit and
1174                  * try again.
1175                  */
1176                 msleep(100);
1177                 goto retry;
1178         }
1179
1180         return SUCCESS;
1181 }
1182
1183 int esas2r_device_reset(struct scsi_cmnd *cmd)
1184 {
1185         esas2r_log(ESAS2R_LOG_INFO, "device_reset (%p)", cmd);
1186
1187         return esas2r_dev_targ_reset(cmd, false);
1188
1189 }
1190
1191 int esas2r_target_reset(struct scsi_cmnd *cmd)
1192 {
1193         esas2r_log(ESAS2R_LOG_INFO, "target_reset (%p)", cmd);
1194
1195         return esas2r_dev_targ_reset(cmd, true);
1196 }
1197
1198 void esas2r_log_request_failure(struct esas2r_adapter *a,
1199                                 struct esas2r_request *rq)
1200 {
1201         u8 reqstatus = rq->req_stat;
1202
1203         if (reqstatus == RS_SUCCESS)
1204                 return;
1205
1206         if (rq->vrq->scsi.function == VDA_FUNC_SCSI) {
1207                 if (reqstatus == RS_SCSI_ERROR) {
1208                         if (rq->func_rsp.scsi_rsp.sense_len >= 13) {
1209                                 esas2r_log(ESAS2R_LOG_WARN,
1210                                            "request failure - SCSI error %x ASC:%x ASCQ:%x CDB:%x",
1211                                            rq->sense_buf[2], rq->sense_buf[12],
1212                                            rq->sense_buf[13],
1213                                            rq->vrq->scsi.cdb[0]);
1214                         } else {
1215                                 esas2r_log(ESAS2R_LOG_WARN,
1216                                            "request failure - SCSI error CDB:%x\n",
1217                                            rq->vrq->scsi.cdb[0]);
1218                         }
1219                 } else if ((rq->vrq->scsi.cdb[0] != INQUIRY
1220                             && rq->vrq->scsi.cdb[0] != REPORT_LUNS)
1221                            || (reqstatus != RS_SEL
1222                                && reqstatus != RS_SEL2)) {
1223                         if ((reqstatus == RS_UNDERRUN) &&
1224                             (rq->vrq->scsi.cdb[0] == INQUIRY)) {
1225                                 /* Don't log inquiry underruns */
1226                         } else {
1227                                 esas2r_log(ESAS2R_LOG_WARN,
1228                                            "request failure - cdb:%x reqstatus:%d target:%d",
1229                                            rq->vrq->scsi.cdb[0], reqstatus,
1230                                            rq->target_id);
1231                         }
1232                 }
1233         }
1234 }
1235
1236 void esas2r_wait_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1237 {
1238         u32 starttime;
1239         u32 timeout;
1240
1241         starttime = jiffies_to_msecs(jiffies);
1242         timeout = rq->timeout ? rq->timeout : 5000;
1243
1244         while (true) {
1245                 esas2r_polled_interrupt(a);
1246
1247                 if (rq->req_stat != RS_STARTED)
1248                         break;
1249
1250                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1251
1252                 if ((jiffies_to_msecs(jiffies) - starttime) > timeout) {
1253                         esas2r_hdebug("request TMO");
1254                         esas2r_bugon();
1255
1256                         rq->req_stat = RS_TIMEOUT;
1257
1258                         esas2r_local_reset_adapter(a);
1259                         return;
1260                 }
1261         }
1262 }
1263
1264 u32 esas2r_map_data_window(struct esas2r_adapter *a, u32 addr_lo)
1265 {
1266         u32 offset = addr_lo & (MW_DATA_WINDOW_SIZE - 1);
1267         u32 base = addr_lo & -(signed int)MW_DATA_WINDOW_SIZE;
1268
1269         if (a->window_base != base) {
1270                 esas2r_write_register_dword(a, MVR_PCI_WIN1_REMAP,
1271                                             base | MVRPW1R_ENABLE);
1272                 esas2r_flush_register_dword(a, MVR_PCI_WIN1_REMAP);
1273                 a->window_base = base;
1274         }
1275
1276         return offset;
1277 }
1278
1279 /* Read a block of data from chip memory */
1280 bool esas2r_read_mem_block(struct esas2r_adapter *a,
1281                            void *to,
1282                            u32 from,
1283                            u32 size)
1284 {
1285         u8 *end = (u8 *)to;
1286
1287         while (size) {
1288                 u32 len;
1289                 u32 offset;
1290                 u32 iatvr;
1291
1292                 iatvr = (from & -(signed int)MW_DATA_WINDOW_SIZE);
1293
1294                 esas2r_map_data_window(a, iatvr);
1295
1296                 offset = from & (MW_DATA_WINDOW_SIZE - 1);
1297                 len = size;
1298
1299                 if (len > MW_DATA_WINDOW_SIZE - offset)
1300                         len = MW_DATA_WINDOW_SIZE - offset;
1301
1302                 from += len;
1303                 size -= len;
1304
1305                 while (len--) {
1306                         *end++ = esas2r_read_data_byte(a, offset);
1307                         offset++;
1308                 }
1309         }
1310
1311         return true;
1312 }
1313
1314 void esas2r_nuxi_mgt_data(u8 function, void *data)
1315 {
1316         struct atto_vda_grp_info *g;
1317         struct atto_vda_devinfo *d;
1318         struct atto_vdapart_info *p;
1319         struct atto_vda_dh_info *h;
1320         struct atto_vda_metrics_info *m;
1321         struct atto_vda_schedule_info *s;
1322         struct atto_vda_buzzer_info *b;
1323         u8 i;
1324
1325         switch (function) {
1326         case VDAMGT_BUZZER_INFO:
1327         case VDAMGT_BUZZER_SET:
1328
1329                 b = (struct atto_vda_buzzer_info *)data;
1330
1331                 b->duration = le32_to_cpu(b->duration);
1332                 break;
1333
1334         case VDAMGT_SCHEDULE_INFO:
1335         case VDAMGT_SCHEDULE_EVENT:
1336
1337                 s = (struct atto_vda_schedule_info *)data;
1338
1339                 s->id = le32_to_cpu(s->id);
1340
1341                 break;
1342
1343         case VDAMGT_DEV_INFO:
1344         case VDAMGT_DEV_CLEAN:
1345         case VDAMGT_DEV_PT_INFO:
1346         case VDAMGT_DEV_FEATURES:
1347         case VDAMGT_DEV_PT_FEATURES:
1348         case VDAMGT_DEV_OPERATION:
1349
1350                 d = (struct atto_vda_devinfo *)data;
1351
1352                 d->capacity = le64_to_cpu(d->capacity);
1353                 d->block_size = le32_to_cpu(d->block_size);
1354                 d->ses_dev_index = le16_to_cpu(d->ses_dev_index);
1355                 d->target_id = le16_to_cpu(d->target_id);
1356                 d->lun = le16_to_cpu(d->lun);
1357                 d->features = le16_to_cpu(d->features);
1358                 break;
1359
1360         case VDAMGT_GRP_INFO:
1361         case VDAMGT_GRP_CREATE:
1362         case VDAMGT_GRP_DELETE:
1363         case VDAMGT_ADD_STORAGE:
1364         case VDAMGT_MEMBER_ADD:
1365         case VDAMGT_GRP_COMMIT:
1366         case VDAMGT_GRP_REBUILD:
1367         case VDAMGT_GRP_COMMIT_INIT:
1368         case VDAMGT_QUICK_RAID:
1369         case VDAMGT_GRP_FEATURES:
1370         case VDAMGT_GRP_COMMIT_INIT_AUTOMAP:
1371         case VDAMGT_QUICK_RAID_INIT_AUTOMAP:
1372         case VDAMGT_SPARE_LIST:
1373         case VDAMGT_SPARE_ADD:
1374         case VDAMGT_SPARE_REMOVE:
1375         case VDAMGT_LOCAL_SPARE_ADD:
1376         case VDAMGT_GRP_OPERATION:
1377
1378                 g = (struct atto_vda_grp_info *)data;
1379
1380                 g->capacity = le64_to_cpu(g->capacity);
1381                 g->block_size = le32_to_cpu(g->block_size);
1382                 g->interleave = le32_to_cpu(g->interleave);
1383                 g->features = le16_to_cpu(g->features);
1384
1385                 for (i = 0; i < 32; i++)
1386                         g->members[i] = le16_to_cpu(g->members[i]);
1387
1388                 break;
1389
1390         case VDAMGT_PART_INFO:
1391         case VDAMGT_PART_MAP:
1392         case VDAMGT_PART_UNMAP:
1393         case VDAMGT_PART_AUTOMAP:
1394         case VDAMGT_PART_SPLIT:
1395         case VDAMGT_PART_MERGE:
1396
1397                 p = (struct atto_vdapart_info *)data;
1398
1399                 p->part_size = le64_to_cpu(p->part_size);
1400                 p->start_lba = le32_to_cpu(p->start_lba);
1401                 p->block_size = le32_to_cpu(p->block_size);
1402                 p->target_id = le16_to_cpu(p->target_id);
1403                 break;
1404
1405         case VDAMGT_DEV_HEALTH_REQ:
1406
1407                 h = (struct atto_vda_dh_info *)data;
1408
1409                 h->med_defect_cnt = le32_to_cpu(h->med_defect_cnt);
1410                 h->info_exc_cnt = le32_to_cpu(h->info_exc_cnt);
1411                 break;
1412
1413         case VDAMGT_DEV_METRICS:
1414
1415                 m = (struct atto_vda_metrics_info *)data;
1416
1417                 for (i = 0; i < 32; i++)
1418                         m->dev_indexes[i] = le16_to_cpu(m->dev_indexes[i]);
1419
1420                 break;
1421
1422         default:
1423                 break;
1424         }
1425 }
1426
1427 void esas2r_nuxi_cfg_data(u8 function, void *data)
1428 {
1429         struct atto_vda_cfg_init *ci;
1430
1431         switch (function) {
1432         case VDA_CFG_INIT:
1433         case VDA_CFG_GET_INIT:
1434         case VDA_CFG_GET_INIT2:
1435
1436                 ci = (struct atto_vda_cfg_init *)data;
1437
1438                 ci->date_time.year = le16_to_cpu(ci->date_time.year);
1439                 ci->sgl_page_size = le32_to_cpu(ci->sgl_page_size);
1440                 ci->vda_version = le32_to_cpu(ci->vda_version);
1441                 ci->epoch_time = le32_to_cpu(ci->epoch_time);
1442                 ci->ioctl_tunnel = le32_to_cpu(ci->ioctl_tunnel);
1443                 ci->num_targets_backend = le32_to_cpu(ci->num_targets_backend);
1444                 break;
1445
1446         default:
1447                 break;
1448         }
1449 }
1450
1451 void esas2r_nuxi_ae_data(union atto_vda_ae *ae)
1452 {
1453         struct atto_vda_ae_raid *r = &ae->raid;
1454         struct atto_vda_ae_lu *l = &ae->lu;
1455
1456         switch (ae->hdr.bytype) {
1457         case VDAAE_HDR_TYPE_RAID:
1458
1459                 r->dwflags = le32_to_cpu(r->dwflags);
1460                 break;
1461
1462         case VDAAE_HDR_TYPE_LU:
1463
1464                 l->dwevent = le32_to_cpu(l->dwevent);
1465                 l->wphys_target_id = le16_to_cpu(l->wphys_target_id);
1466                 l->id.tgtlun.wtarget_id = le16_to_cpu(l->id.tgtlun.wtarget_id);
1467
1468                 if (l->hdr.bylength >= offsetof(struct atto_vda_ae_lu, id)
1469                     + sizeof(struct atto_vda_ae_lu_tgt_lun_raid)) {
1470                         l->id.tgtlun_raid.dwinterleave
1471                                 = le32_to_cpu(l->id.tgtlun_raid.dwinterleave);
1472                         l->id.tgtlun_raid.dwblock_size
1473                                 = le32_to_cpu(l->id.tgtlun_raid.dwblock_size);
1474                 }
1475
1476                 break;
1477
1478         case VDAAE_HDR_TYPE_DISK:
1479         default:
1480                 break;
1481         }
1482 }
1483
1484 void esas2r_free_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1485 {
1486         unsigned long flags;
1487
1488         esas2r_rq_destroy_request(rq, a);
1489         spin_lock_irqsave(&a->request_lock, flags);
1490         list_add(&rq->comp_list, &a->avail_request);
1491         spin_unlock_irqrestore(&a->request_lock, flags);
1492 }
1493
1494 struct esas2r_request *esas2r_alloc_request(struct esas2r_adapter *a)
1495 {
1496         struct esas2r_request *rq;
1497         unsigned long flags;
1498
1499         spin_lock_irqsave(&a->request_lock, flags);
1500
1501         if (unlikely(list_empty(&a->avail_request))) {
1502                 spin_unlock_irqrestore(&a->request_lock, flags);
1503                 return NULL;
1504         }
1505
1506         rq = list_first_entry(&a->avail_request, struct esas2r_request,
1507                               comp_list);
1508         list_del(&rq->comp_list);
1509         spin_unlock_irqrestore(&a->request_lock, flags);
1510         esas2r_rq_init_request(rq, a);
1511
1512         return rq;
1513
1514 }
1515
1516 void esas2r_complete_request_cb(struct esas2r_adapter *a,
1517                                 struct esas2r_request *rq)
1518 {
1519         esas2r_debug("completing request %p\n", rq);
1520
1521         scsi_dma_unmap(rq->cmd);
1522
1523         if (unlikely(rq->req_stat != RS_SUCCESS)) {
1524                 esas2r_debug("[%x STATUS %x:%x (%x)]", rq->target_id,
1525                              rq->req_stat,
1526                              rq->func_rsp.scsi_rsp.scsi_stat,
1527                              rq->cmd);
1528
1529                 rq->cmd->result =
1530                         ((esas2r_req_status_to_error(rq->req_stat) << 16)
1531                          | rq->func_rsp.scsi_rsp.scsi_stat);
1532
1533                 if (rq->req_stat == RS_UNDERRUN)
1534                         scsi_set_resid(rq->cmd,
1535                                        le32_to_cpu(rq->func_rsp.scsi_rsp.
1536                                                    residual_length));
1537                 else
1538                         scsi_set_resid(rq->cmd, 0);
1539         }
1540
1541         scsi_done(rq->cmd);
1542
1543         esas2r_free_request(a, rq);
1544 }
1545
1546 /* Run tasklet to handle stuff outside of interrupt context. */
1547 void esas2r_adapter_tasklet(unsigned long context)
1548 {
1549         struct esas2r_adapter *a = (struct esas2r_adapter *)context;
1550
1551         if (unlikely(test_bit(AF2_TIMER_TICK, &a->flags2))) {
1552                 clear_bit(AF2_TIMER_TICK, &a->flags2);
1553                 esas2r_timer_tick(a);
1554         }
1555
1556         if (likely(test_bit(AF2_INT_PENDING, &a->flags2))) {
1557                 clear_bit(AF2_INT_PENDING, &a->flags2);
1558                 esas2r_adapter_interrupt(a);
1559         }
1560
1561         if (esas2r_is_tasklet_pending(a))
1562                 esas2r_do_tasklet_tasks(a);
1563
1564         if (esas2r_is_tasklet_pending(a)
1565             || (test_bit(AF2_INT_PENDING, &a->flags2))
1566             || (test_bit(AF2_TIMER_TICK, &a->flags2))) {
1567                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1568                 esas2r_schedule_tasklet(a);
1569         } else {
1570                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1571         }
1572 }
1573
1574 static void esas2r_timer_callback(struct timer_list *t);
1575
1576 void esas2r_kickoff_timer(struct esas2r_adapter *a)
1577 {
1578         timer_setup(&a->timer, esas2r_timer_callback, 0);
1579
1580         a->timer.expires = jiffies +
1581                            msecs_to_jiffies(100);
1582
1583         add_timer(&a->timer);
1584 }
1585
1586 static void esas2r_timer_callback(struct timer_list *t)
1587 {
1588         struct esas2r_adapter *a = from_timer(a, t, timer);
1589
1590         set_bit(AF2_TIMER_TICK, &a->flags2);
1591
1592         esas2r_schedule_tasklet(a);
1593
1594         esas2r_kickoff_timer(a);
1595 }
1596
1597 /*
1598  * Firmware events need to be handled outside of interrupt context
1599  * so we schedule a delayed_work to handle them.
1600  */
1601
1602 static void
1603 esas2r_free_fw_event(struct esas2r_fw_event_work *fw_event)
1604 {
1605         unsigned long flags;
1606         struct esas2r_adapter *a = fw_event->a;
1607
1608         spin_lock_irqsave(&a->fw_event_lock, flags);
1609         list_del(&fw_event->list);
1610         kfree(fw_event);
1611         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1612 }
1613
1614 void
1615 esas2r_fw_event_off(struct esas2r_adapter *a)
1616 {
1617         unsigned long flags;
1618
1619         spin_lock_irqsave(&a->fw_event_lock, flags);
1620         a->fw_events_off = 1;
1621         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1622 }
1623
1624 void
1625 esas2r_fw_event_on(struct esas2r_adapter *a)
1626 {
1627         unsigned long flags;
1628
1629         spin_lock_irqsave(&a->fw_event_lock, flags);
1630         a->fw_events_off = 0;
1631         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1632 }
1633
1634 static void esas2r_add_device(struct esas2r_adapter *a, u16 target_id)
1635 {
1636         int ret;
1637         struct scsi_device *scsi_dev;
1638
1639         scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1640
1641         if (scsi_dev) {
1642                 esas2r_log_dev(
1643                         ESAS2R_LOG_WARN,
1644                         &(scsi_dev->
1645                           sdev_gendev),
1646                         "scsi device already exists at id %d", target_id);
1647
1648                 scsi_device_put(scsi_dev);
1649         } else {
1650                 esas2r_log_dev(
1651                         ESAS2R_LOG_INFO,
1652                         &(a->host->
1653                           shost_gendev),
1654                         "scsi_add_device() called for 0:%d:0",
1655                         target_id);
1656
1657                 ret = scsi_add_device(a->host, 0, target_id, 0);
1658                 if (ret) {
1659                         esas2r_log_dev(
1660                                 ESAS2R_LOG_CRIT,
1661                                 &(a->host->
1662                                   shost_gendev),
1663                                 "scsi_add_device failed with %d for id %d",
1664                                 ret, target_id);
1665                 }
1666         }
1667 }
1668
1669 static void esas2r_remove_device(struct esas2r_adapter *a, u16 target_id)
1670 {
1671         struct scsi_device *scsi_dev;
1672
1673         scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1674
1675         if (scsi_dev) {
1676                 scsi_device_set_state(scsi_dev, SDEV_OFFLINE);
1677
1678                 esas2r_log_dev(
1679                         ESAS2R_LOG_INFO,
1680                         &(scsi_dev->
1681                           sdev_gendev),
1682                         "scsi_remove_device() called for 0:%d:0",
1683                         target_id);
1684
1685                 scsi_remove_device(scsi_dev);
1686
1687                 esas2r_log_dev(
1688                         ESAS2R_LOG_INFO,
1689                         &(scsi_dev->
1690                           sdev_gendev),
1691                         "scsi_device_put() called");
1692
1693                 scsi_device_put(scsi_dev);
1694         } else {
1695                 esas2r_log_dev(
1696                         ESAS2R_LOG_WARN,
1697                         &(a->host->shost_gendev),
1698                         "no target found at id %d",
1699                         target_id);
1700         }
1701 }
1702
1703 /*
1704  * Sends a firmware asynchronous event to anyone who happens to be
1705  * listening on the defined ATTO VDA event ports.
1706  */
1707 static void esas2r_send_ae_event(struct esas2r_fw_event_work *fw_event)
1708 {
1709         struct esas2r_vda_ae *ae = (struct esas2r_vda_ae *)fw_event->data;
1710         char *type;
1711
1712         switch (ae->vda_ae.hdr.bytype) {
1713         case VDAAE_HDR_TYPE_RAID:
1714                 type = "RAID group state change";
1715                 break;
1716
1717         case VDAAE_HDR_TYPE_LU:
1718                 type = "Mapped destination LU change";
1719                 break;
1720
1721         case VDAAE_HDR_TYPE_DISK:
1722                 type = "Physical disk inventory change";
1723                 break;
1724
1725         case VDAAE_HDR_TYPE_RESET:
1726                 type = "Firmware reset";
1727                 break;
1728
1729         case VDAAE_HDR_TYPE_LOG_INFO:
1730                 type = "Event Log message (INFO level)";
1731                 break;
1732
1733         case VDAAE_HDR_TYPE_LOG_WARN:
1734                 type = "Event Log message (WARN level)";
1735                 break;
1736
1737         case VDAAE_HDR_TYPE_LOG_CRIT:
1738                 type = "Event Log message (CRIT level)";
1739                 break;
1740
1741         case VDAAE_HDR_TYPE_LOG_FAIL:
1742                 type = "Event Log message (FAIL level)";
1743                 break;
1744
1745         case VDAAE_HDR_TYPE_NVC:
1746                 type = "NVCache change";
1747                 break;
1748
1749         case VDAAE_HDR_TYPE_TLG_INFO:
1750                 type = "Time stamped log message (INFO level)";
1751                 break;
1752
1753         case VDAAE_HDR_TYPE_TLG_WARN:
1754                 type = "Time stamped log message (WARN level)";
1755                 break;
1756
1757         case VDAAE_HDR_TYPE_TLG_CRIT:
1758                 type = "Time stamped log message (CRIT level)";
1759                 break;
1760
1761         case VDAAE_HDR_TYPE_PWRMGT:
1762                 type = "Power management";
1763                 break;
1764
1765         case VDAAE_HDR_TYPE_MUTE:
1766                 type = "Mute button pressed";
1767                 break;
1768
1769         case VDAAE_HDR_TYPE_DEV:
1770                 type = "Device attribute change";
1771                 break;
1772
1773         default:
1774                 type = "Unknown";
1775                 break;
1776         }
1777
1778         esas2r_log(ESAS2R_LOG_WARN,
1779                    "An async event of type \"%s\" was received from the firmware.  The event contents are:",
1780                    type);
1781         esas2r_log_hexdump(ESAS2R_LOG_WARN, &ae->vda_ae,
1782                            ae->vda_ae.hdr.bylength);
1783
1784 }
1785
1786 static void
1787 esas2r_firmware_event_work(struct work_struct *work)
1788 {
1789         struct esas2r_fw_event_work *fw_event =
1790                 container_of(work, struct esas2r_fw_event_work, work.work);
1791
1792         struct esas2r_adapter *a = fw_event->a;
1793
1794         u16 target_id = *(u16 *)&fw_event->data[0];
1795
1796         if (a->fw_events_off)
1797                 goto done;
1798
1799         switch (fw_event->type) {
1800         case fw_event_null:
1801                 break; /* do nothing */
1802
1803         case fw_event_lun_change:
1804                 esas2r_remove_device(a, target_id);
1805                 esas2r_add_device(a, target_id);
1806                 break;
1807
1808         case fw_event_present:
1809                 esas2r_add_device(a, target_id);
1810                 break;
1811
1812         case fw_event_not_present:
1813                 esas2r_remove_device(a, target_id);
1814                 break;
1815
1816         case fw_event_vda_ae:
1817                 esas2r_send_ae_event(fw_event);
1818                 break;
1819         }
1820
1821 done:
1822         esas2r_free_fw_event(fw_event);
1823 }
1824
1825 void esas2r_queue_fw_event(struct esas2r_adapter *a,
1826                            enum fw_event_type type,
1827                            void *data,
1828                            int data_sz)
1829 {
1830         struct esas2r_fw_event_work *fw_event;
1831         unsigned long flags;
1832
1833         fw_event = kzalloc(sizeof(struct esas2r_fw_event_work), GFP_ATOMIC);
1834         if (!fw_event) {
1835                 esas2r_log(ESAS2R_LOG_WARN,
1836                            "esas2r_queue_fw_event failed to alloc");
1837                 return;
1838         }
1839
1840         if (type == fw_event_vda_ae) {
1841                 struct esas2r_vda_ae *ae =
1842                         (struct esas2r_vda_ae *)fw_event->data;
1843
1844                 ae->signature = ESAS2R_VDA_EVENT_SIG;
1845                 ae->bus_number = a->pcid->bus->number;
1846                 ae->devfn = a->pcid->devfn;
1847                 memcpy(&ae->vda_ae, data, sizeof(ae->vda_ae));
1848         } else {
1849                 memcpy(fw_event->data, data, data_sz);
1850         }
1851
1852         fw_event->type = type;
1853         fw_event->a = a;
1854
1855         spin_lock_irqsave(&a->fw_event_lock, flags);
1856         list_add_tail(&fw_event->list, &a->fw_event_list);
1857         INIT_DELAYED_WORK(&fw_event->work, esas2r_firmware_event_work);
1858         queue_delayed_work_on(
1859                 smp_processor_id(), a->fw_event_q, &fw_event->work,
1860                 msecs_to_jiffies(1));
1861         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1862 }
1863
1864 void esas2r_target_state_changed(struct esas2r_adapter *a, u16 targ_id,
1865                                  u8 state)
1866 {
1867         if (state == TS_LUN_CHANGE)
1868                 esas2r_queue_fw_event(a, fw_event_lun_change, &targ_id,
1869                                       sizeof(targ_id));
1870         else if (state == TS_PRESENT)
1871                 esas2r_queue_fw_event(a, fw_event_present, &targ_id,
1872                                       sizeof(targ_id));
1873         else if (state == TS_NOT_PRESENT)
1874                 esas2r_queue_fw_event(a, fw_event_not_present, &targ_id,
1875                                       sizeof(targ_id));
1876 }
1877
1878 /* Translate status to a Linux SCSI mid-layer error code */
1879 int esas2r_req_status_to_error(u8 req_stat)
1880 {
1881         switch (req_stat) {
1882         case RS_OVERRUN:
1883         case RS_UNDERRUN:
1884         case RS_SUCCESS:
1885         /*
1886          * NOTE: SCSI mid-layer wants a good status for a SCSI error, because
1887          *       it will check the scsi_stat value in the completion anyway.
1888          */
1889         case RS_SCSI_ERROR:
1890                 return DID_OK;
1891
1892         case RS_SEL:
1893         case RS_SEL2:
1894                 return DID_NO_CONNECT;
1895
1896         case RS_RESET:
1897                 return DID_RESET;
1898
1899         case RS_ABORTED:
1900                 return DID_ABORT;
1901
1902         case RS_BUSY:
1903                 return DID_BUS_BUSY;
1904         }
1905
1906         /* everything else is just an error. */
1907
1908         return DID_ERROR;
1909 }
1910
1911 module_init(esas2r_init);
1912 module_exit(esas2r_exit);