drivers/scsi/libsas/sas_discover.c

   1 /*
   2  * Serial Attached SCSI (SAS) Discover process
   3  *
   4  * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
   5  * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
   6  *
   7  * This file is licensed under GPLv2.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  22  *
  23  */
  24
  25 #include <linux/pci.h>
  26 #include <linux/scatterlist.h>
  27 #include <scsi/scsi_host.h>
  28 #include <scsi/scsi_eh.h>
  29 #include "sas_internal.h"
  30
  31 #include <scsi/scsi_transport.h>
  32 #include <scsi/scsi_transport_sas.h>
  33 #include "../scsi_sas_internal.h"
  34
  35 /* ---------- Basic task processing for discovery purposes ---------- */
  36
  37 void sas_init_dev(struct domain_device *dev)
  38 {
  39         INIT_LIST_HEAD(&dev->siblings);
  40         INIT_LIST_HEAD(&dev->dev_list_node);
  41         switch (dev->dev_type) {
  42         case SAS_END_DEV:
  43                 break;
  44         case EDGE_DEV:
  45         case FANOUT_DEV:
  46                 INIT_LIST_HEAD(&dev->ex_dev.children);
  47                 break;
  48         case SATA_DEV:
  49         case SATA_PM:
  50         case SATA_PM_PORT:
  51                 INIT_LIST_HEAD(&dev->sata_dev.children);
  52                 break;
  53         default:
  54                 break;
  55         }
  56 }
  57
  58 static void sas_task_timedout(unsigned long _task)
  59 {
  60         struct sas_task *task = (void *) _task;
  61         unsigned long flags;
  62
  63         spin_lock_irqsave(&task->task_state_lock, flags);
  64         if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
  65                 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
  66         spin_unlock_irqrestore(&task->task_state_lock, flags);
  67
  68         complete(&task->completion);
  69 }
  70
  71 static void sas_disc_task_done(struct sas_task *task)
  72 {
  73         if (!del_timer(&task->timer))
  74                 return;
  75         complete(&task->completion);
  76 }
  77
  78 #define SAS_DEV_TIMEOUT 10
  79
  80 /**
  81  * sas_execute_task -- Basic task processing for discovery
  82  * @task: the task to be executed
  83  * @buffer: pointer to buffer to do I/O
  84  * @size: size of @buffer
  85  * @pci_dma_dir: PCI_DMA_...
  86  */
  87 static int sas_execute_task(struct sas_task *task, void *buffer, int size,
  88                             int pci_dma_dir)
  89 {
  90         int res = 0;
  91         struct scatterlist *scatter = NULL;
  92         struct task_status_struct *ts = &task->task_status;
  93         int num_scatter = 0;
  94         int retries = 0;
  95         struct sas_internal *i =
  96                 to_sas_internal(task->dev->port->ha->core.shost->transportt);
  97
  98         if (pci_dma_dir != PCI_DMA_NONE) {
  99                 scatter = kzalloc(sizeof(*scatter), GFP_KERNEL);
 100                 if (!scatter)
 101                         goto out;
 102
 103                 sg_init_one(scatter, buffer, size);
 104                 num_scatter = 1;
 105         }
 106
 107         task->task_proto = task->dev->tproto;
 108         task->scatter = scatter;
 109         task->num_scatter = num_scatter;
 110         task->total_xfer_len = size;
 111         task->data_dir = pci_dma_dir;
 112         task->task_done = sas_disc_task_done;
 113
 114         for (retries = 0; retries < 5; retries++) {
 115                 task->task_state_flags = SAS_TASK_STATE_PENDING;
 116                 init_completion(&task->completion);
 117
 118                 task->timer.data = (unsigned long) task;
 119                 task->timer.function = sas_task_timedout;
 120                 task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ;
 121                 add_timer(&task->timer);
 122
 123                 res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
 124                 if (res) {
 125                         del_timer(&task->timer);
 126                         SAS_DPRINTK("executing SAS discovery task failed:%d\n",
 127                                     res);
 128                         goto ex_err;
 129                 }
 130                 wait_for_completion(&task->completion);
 131                 res = -ETASK;
 132                 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
 133                         int res2;
 134                         SAS_DPRINTK("task aborted, flags:0x%x\n",
 135                                     task->task_state_flags);
 136                         res2 = i->dft->lldd_abort_task(task);
 137                         SAS_DPRINTK("came back from abort task\n");
 138                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 139                                 if (res2 == TMF_RESP_FUNC_COMPLETE)
 140                                         continue; /* Retry the task */
 141                                 else
 142                                         goto ex_err;
 143                         }
 144                 }
 145                 if (task->task_status.stat == SAM_BUSY ||
 146                            task->task_status.stat == SAM_TASK_SET_FULL ||
 147                            task->task_status.stat == SAS_QUEUE_FULL) {
 148                         SAS_DPRINTK("task: q busy, sleeping...\n");
 149                         schedule_timeout_interruptible(HZ);
 150                 } else if (task->task_status.stat == SAM_CHECK_COND) {
 151                         struct scsi_sense_hdr shdr;
 152
 153                         if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size,
 154                                                   &shdr)) {
 155                                 SAS_DPRINTK("couldn't normalize sense\n");
 156                                 continue;
 157                         }
 158                         if ((shdr.sense_key == 6 && shdr.asc == 0x29) ||
 159                             (shdr.sense_key == 2 && shdr.asc == 4 &&
 160                              shdr.ascq == 1)) {
 161                                 SAS_DPRINTK("device %016llx LUN: %016llx "
 162                                             "powering up or not ready yet, "
 163                                             "sleeping...\n",
 164                                             SAS_ADDR(task->dev->sas_addr),
 165                                             SAS_ADDR(task->ssp_task.LUN));
 166
 167                                 schedule_timeout_interruptible(5*HZ);
 168                         } else if (shdr.sense_key == 1) {
 169                                 res = 0;
 170                                 break;
 171                         } else if (shdr.sense_key == 5) {
 172                                 break;
 173                         } else {
 174                                 SAS_DPRINTK("dev %016llx LUN: %016llx "
 175                                             "sense key:0x%x ASC:0x%x ASCQ:0x%x"
 176                                             "\n",
 177                                             SAS_ADDR(task->dev->sas_addr),
 178                                             SAS_ADDR(task->ssp_task.LUN),
 179                                             shdr.sense_key,
 180                                             shdr.asc, shdr.ascq);
 181                         }
 182                 } else if (task->task_status.resp != SAS_TASK_COMPLETE ||
 183                            task->task_status.stat != SAM_GOOD) {
 184                         SAS_DPRINTK("task finished with resp:0x%x, "
 185                                     "stat:0x%x\n",
 186                                     task->task_status.resp,
 187                                     task->task_status.stat);
 188                         goto ex_err;
 189                 } else {
 190                         res = 0;
 191                         break;
 192                 }
 193         }
 194 ex_err:
 195         if (pci_dma_dir != PCI_DMA_NONE)
 196                 kfree(scatter);
 197 out:
 198         return res;
 199 }
 200
 201 /* ---------- Domain device discovery ---------- */
 202
 203 /**
 204  * sas_get_port_device -- Discover devices which caused port creation
 205  * @port: pointer to struct sas_port of interest
 206  *
 207  * Devices directly attached to a HA port, have no parent.  This is
 208  * how we know they are (domain) "root" devices.  All other devices
 209  * do, and should have their "parent" pointer set appropriately as
 210  * soon as a child device is discovered.
 211  */
 212 static int sas_get_port_device(struct asd_sas_port *port)
 213 {
 214         unsigned long flags;
 215         struct asd_sas_phy *phy;
 216         struct sas_rphy *rphy;
 217         struct domain_device *dev;
 218
 219         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 220         if (!dev)
 221                 return -ENOMEM;
 222
 223         spin_lock_irqsave(&port->phy_list_lock, flags);
 224         if (list_empty(&port->phy_list)) {
 225                 spin_unlock_irqrestore(&port->phy_list_lock, flags);
 226                 kfree(dev);
 227                 return -ENODEV;
 228         }
 229         phy = container_of(port->phy_list.next, struct asd_sas_phy, port_phy_el);
 230         spin_lock(&phy->frame_rcvd_lock);
 231         memcpy(dev->frame_rcvd, phy->frame_rcvd, min(sizeof(dev->frame_rcvd),
 232                                              (size_t)phy->frame_rcvd_size));
 233         spin_unlock(&phy->frame_rcvd_lock);
 234         spin_unlock_irqrestore(&port->phy_list_lock, flags);
 235
 236         if (dev->frame_rcvd[0] == 0x34 && port->oob_mode == SATA_OOB_MODE) {
 237                 struct dev_to_host_fis *fis =
 238                         (struct dev_to_host_fis *) dev->frame_rcvd;
 239                 if (fis->interrupt_reason == 1 && fis->lbal == 1 &&
 240                     fis->byte_count_low==0x69 && fis->byte_count_high == 0x96
 241                     && (fis->device & ~0x10) == 0)
 242                         dev->dev_type = SATA_PM;
 243                 else
 244                         dev->dev_type = SATA_DEV;
 245                 dev->tproto = SATA_PROTO;
 246         } else {
 247                 struct sas_identify_frame *id =
 248                         (struct sas_identify_frame *) dev->frame_rcvd;
 249                 dev->dev_type = id->dev_type;
 250                 dev->iproto = id->initiator_bits;
 251                 dev->tproto = id->target_bits;
 252         }
 253
 254         sas_init_dev(dev);
 255
 256         switch (dev->dev_type) {
 257         case SAS_END_DEV:
 258                 rphy = sas_end_device_alloc(port->port);
 259                 break;
 260         case EDGE_DEV:
 261                 rphy = sas_expander_alloc(port->port,
 262                                           SAS_EDGE_EXPANDER_DEVICE);
 263                 break;
 264         case FANOUT_DEV:
 265                 rphy = sas_expander_alloc(port->port,
 266                                           SAS_FANOUT_EXPANDER_DEVICE);
 267                 break;
 268         case SATA_DEV:
 269         default:
 270                 printk("ERROR: Unidentified device type %d\n", dev->dev_type);
 271                 rphy = NULL;
 272                 break;
 273         }
 274
 275         if (!rphy) {
 276                 kfree(dev);
 277                 return -ENODEV;
 278         }
 279         rphy->identify.phy_identifier = phy->phy->identify.phy_identifier;
 280         memcpy(dev->sas_addr, port->attached_sas_addr, SAS_ADDR_SIZE);
 281         sas_fill_in_rphy(dev, rphy);
 282         sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
 283         port->port_dev = dev;
 284         dev->port = port;
 285         dev->linkrate = port->linkrate;
 286         dev->min_linkrate = port->linkrate;
 287         dev->max_linkrate = port->linkrate;
 288         dev->pathways = port->num_phys;
 289         memset(port->disc.fanout_sas_addr, 0, SAS_ADDR_SIZE);
 290         memset(port->disc.eeds_a, 0, SAS_ADDR_SIZE);
 291         memset(port->disc.eeds_b, 0, SAS_ADDR_SIZE);
 292         port->disc.max_level = 0;
 293
 294         dev->rphy = rphy;
 295         spin_lock(&port->dev_list_lock);
 296         list_add_tail(&dev->dev_list_node, &port->dev_list);
 297         spin_unlock(&port->dev_list_lock);
 298
 299         return 0;
 300 }
 301
 302 /* ---------- Discover and Revalidate ---------- */
 303
 304 /* ---------- SATA ---------- */
 305
 306 static void sas_get_ata_command_set(struct domain_device *dev)
 307 {
 308         struct dev_to_host_fis *fis =
 309                 (struct dev_to_host_fis *) dev->frame_rcvd;
 310
 311         if ((fis->sector_count == 1 && /* ATA */
 312              fis->lbal         == 1 &&
 313              fis->lbam         == 0 &&
 314              fis->lbah         == 0 &&
 315              fis->device       == 0)
 316             ||
 317             (fis->sector_count == 0 && /* CE-ATA (mATA) */
 318              fis->lbal         == 0 &&
 319              fis->lbam         == 0xCE &&
 320              fis->lbah         == 0xAA &&
 321              (fis->device & ~0x10) == 0))
 322
 323                 dev->sata_dev.command_set = ATA_COMMAND_SET;
 324
 325         else if ((fis->interrupt_reason == 1 && /* ATAPI */
 326                   fis->lbal             == 1 &&
 327                   fis->byte_count_low   == 0x14 &&
 328                   fis->byte_count_high  == 0xEB &&
 329                   (fis->device & ~0x10) == 0))
 330
 331                 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
 332
 333         else if ((fis->sector_count == 1 && /* SEMB */
 334                   fis->lbal         == 1 &&
 335                   fis->lbam         == 0x3C &&
 336                   fis->lbah         == 0xC3 &&
 337                   fis->device       == 0)
 338                 ||
 339                  (fis->interrupt_reason == 1 && /* SATA PM */
 340                   fis->lbal             == 1 &&
 341                   fis->byte_count_low   == 0x69 &&
 342                   fis->byte_count_high  == 0x96 &&
 343                   (fis->device & ~0x10) == 0))
 344
 345                 /* Treat it as a superset? */
 346                 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
 347 }
 348
 349 /**
 350  * sas_issue_ata_cmd -- Basic SATA command processing for discovery
 351  * @dev: the device to send the command to
 352  * @command: the command register
 353  * @features: the features register
 354  * @buffer: pointer to buffer to do I/O
 355  * @size: size of @buffer
 356  * @pci_dma_dir: PCI_DMA_...
 357  */
 358 static int sas_issue_ata_cmd(struct domain_device *dev, u8 command,
 359                              u8 features, void *buffer, int size,
 360                              int pci_dma_dir)
 361 {
 362         int res = 0;
 363         struct sas_task *task;
 364         struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *)
 365                 &dev->frame_rcvd[0];
 366
 367         res = -ENOMEM;
 368         task = sas_alloc_task(GFP_KERNEL);
 369         if (!task)
 370                 goto out;
 371
 372         task->dev = dev;
 373
 374         task->ata_task.fis.command = command;
 375         task->ata_task.fis.features = features;
 376         task->ata_task.fis.device = d2h_fis->device;
 377         task->ata_task.retry_count = 1;
 378
 379         res = sas_execute_task(task, buffer, size, pci_dma_dir);
 380
 381         sas_free_task(task);
 382 out:
 383         return res;
 384 }
 385
 386 static void sas_sata_propagate_sas_addr(struct domain_device *dev)
 387 {
 388         unsigned long flags;
 389         struct asd_sas_port *port = dev->port;
 390         struct asd_sas_phy  *phy;
 391
 392         BUG_ON(dev->parent);
 393
 394         memcpy(port->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
 395         spin_lock_irqsave(&port->phy_list_lock, flags);
 396         list_for_each_entry(phy, &port->phy_list, port_phy_el)
 397                 memcpy(phy->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
 398         spin_unlock_irqrestore(&port->phy_list_lock, flags);
 399 }
 400
 401 #define ATA_IDENTIFY_DEV         0xEC
 402 #define ATA_IDENTIFY_PACKET_DEV  0xA1
 403 #define ATA_SET_FEATURES         0xEF
 404 #define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07
 405
 406 /**
 407  * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV)
 408  * @dev: STP/SATA device of interest (ATA/ATAPI)
 409  *
 410  * The LLDD has already been notified of this device, so that we can
 411  * send FISes to it.  Here we try to get IDENTIFY DEVICE or IDENTIFY
 412  * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its
 413  * performance for this device.
 414  */
 415 static int sas_discover_sata_dev(struct domain_device *dev)
 416 {
 417         int     res;
 418         __le16  *identify_x;
 419         u8      command;
 420
 421         identify_x = kzalloc(512, GFP_KERNEL);
 422         if (!identify_x)
 423                 return -ENOMEM;
 424
 425         if (dev->sata_dev.command_set == ATA_COMMAND_SET) {
 426                 dev->sata_dev.identify_device = identify_x;
 427                 command = ATA_IDENTIFY_DEV;
 428         } else {
 429                 dev->sata_dev.identify_packet_device = identify_x;
 430                 command = ATA_IDENTIFY_PACKET_DEV;
 431         }
 432
 433         res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
 434                                 PCI_DMA_FROMDEVICE);
 435         if (res)
 436                 goto out_err;
 437
 438         /* lives on the media? */
 439         if (le16_to_cpu(identify_x[0]) & 4) {
 440                 /* incomplete response */
 441                 SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to "
 442                             "dev %llx\n", SAS_ADDR(dev->sas_addr));
 443                 if (!le16_to_cpu(identify_x[83] & (1<<6)))
 444                         goto cont1;
 445                 res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES,
 446                                         ATA_FEATURE_PUP_STBY_SPIN_UP,
 447                                         NULL, 0, PCI_DMA_NONE);
 448                 if (res)
 449                         goto cont1;
 450
 451                 schedule_timeout_interruptible(5*HZ); /* More time? */
 452                 res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
 453                                         PCI_DMA_FROMDEVICE);
 454                 if (res)
 455                         goto out_err;
 456         }
 457 cont1:
 458         /* Get WWN */
 459         if (dev->port->oob_mode != SATA_OOB_MODE) {
 460                 memcpy(dev->sas_addr, dev->sata_dev.rps_resp.rps.stp_sas_addr,
 461                        SAS_ADDR_SIZE);
 462         } else if (dev->sata_dev.command_set == ATA_COMMAND_SET &&
 463                    (le16_to_cpu(dev->sata_dev.identify_device[108]) & 0xF000)
 464                    == 0x5000) {
 465                 int i;
 466
 467                 for (i = 0; i < 4; i++) {
 468                         dev->sas_addr[2*i] =
 469              (le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0xFF00) >> 8;
 470                         dev->sas_addr[2*i+1] =
 471               le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0x00FF;
 472                 }
 473         }
 474         sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
 475         if (!dev->parent)
 476                 sas_sata_propagate_sas_addr(dev);
 477
 478         /* XXX Hint: register this SATA device with SATL.
 479            When this returns, dev->sata_dev->lu is alive and
 480            present.
 481         sas_satl_register_dev(dev);
 482         */
 483         return 0;
 484 out_err:
 485         dev->sata_dev.identify_packet_device = NULL;
 486         dev->sata_dev.identify_device = NULL;
 487         kfree(identify_x);
 488         return res;
 489 }
 490
 491 static int sas_discover_sata_pm(struct domain_device *dev)
 492 {
 493         return -ENODEV;
 494 }
 495
 496 int sas_notify_lldd_dev_found(struct domain_device *dev)
 497 {
 498         int res = 0;
 499         struct sas_ha_struct *sas_ha = dev->port->ha;
 500         struct Scsi_Host *shost = sas_ha->core.shost;
 501         struct sas_internal *i = to_sas_internal(shost->transportt);
 502
 503         if (i->dft->lldd_dev_found) {
 504                 res = i->dft->lldd_dev_found(dev);
 505                 if (res) {
 506                         printk("sas: driver on pcidev %s cannot handle "
 507                                "device %llx, error:%d\n",
 508                                pci_name(sas_ha->pcidev),
 509                                SAS_ADDR(dev->sas_addr), res);
 510                 }
 511         }
 512         return res;
 513 }
 514
 515
 516 void sas_notify_lldd_dev_gone(struct domain_device *dev)
 517 {
 518         struct sas_ha_struct *sas_ha = dev->port->ha;
 519         struct Scsi_Host *shost = sas_ha->core.shost;
 520         struct sas_internal *i = to_sas_internal(shost->transportt);
 521
 522         if (i->dft->lldd_dev_gone)
 523                 i->dft->lldd_dev_gone(dev);
 524 }
 525
 526 /* ---------- Common/dispatchers ---------- */
 527
 528 /**
 529  * sas_discover_sata -- discover an STP/SATA domain device
 530  * @dev: pointer to struct domain_device of interest
 531  *
 532  * First we notify the LLDD of this device, so we can send frames to
 533  * it.  Then depending on the type of device we call the appropriate
 534  * discover functions.  Once device discover is done, we notify the
 535  * LLDD so that it can fine-tune its parameters for the device, by
 536  * removing it and then adding it.  That is, the second time around,
 537  * the driver would have certain fields, that it is looking at, set.
 538  * Finally we initialize the kobj so that the device can be added to
 539  * the system at registration time.  Devices directly attached to a HA
 540  * port, have no parents.  All other devices do, and should have their
 541  * "parent" pointer set appropriately before calling this function.
 542  */
 543 int sas_discover_sata(struct domain_device *dev)
 544 {
 545         int res;
 546
 547         sas_get_ata_command_set(dev);
 548
 549         res = sas_notify_lldd_dev_found(dev);
 550         if (res)
 551                 return res;
 552
 553         switch (dev->dev_type) {
 554         case SATA_DEV:
 555                 res = sas_discover_sata_dev(dev);
 556                 break;
 557         case SATA_PM:
 558                 res = sas_discover_sata_pm(dev);
 559                 break;
 560         default:
 561                 break;
 562         }
 563
 564         sas_notify_lldd_dev_gone(dev);
 565         if (!res) {
 566                 sas_notify_lldd_dev_found(dev);
 567         }
 568         return res;
 569 }
 570
 571 /**
 572  * sas_discover_end_dev -- discover an end device (SSP, etc)
 573  * @end: pointer to domain device of interest
 574  *
 575  * See comment in sas_discover_sata().
 576  */
 577 int sas_discover_end_dev(struct domain_device *dev)
 578 {
 579         int res;
 580
 581         res = sas_notify_lldd_dev_found(dev);
 582         if (res)
 583                 return res;
 584
 585         res = sas_rphy_add(dev->rphy);
 586         if (res)
 587                 goto out_err;
 588
 589         /* do this to get the end device port attributes which will have
 590          * been scanned in sas_rphy_add */
 591         sas_notify_lldd_dev_gone(dev);
 592         sas_notify_lldd_dev_found(dev);
 593
 594         return 0;
 595
 596 out_err:
 597         sas_notify_lldd_dev_gone(dev);
 598         return res;
 599 }
 600
 601 /* ---------- Device registration and unregistration ---------- */
 602
 603 static inline void sas_unregister_common_dev(struct domain_device *dev)
 604 {
 605         sas_notify_lldd_dev_gone(dev);
 606         if (!dev->parent)
 607                 dev->port->port_dev = NULL;
 608         else
 609                 list_del_init(&dev->siblings);
 610         list_del_init(&dev->dev_list_node);
 611 }
 612
 613 void sas_unregister_dev(struct domain_device *dev)
 614 {
 615         if (dev->rphy) {
 616                 sas_remove_children(&dev->rphy->dev);
 617                 sas_rphy_delete(dev->rphy);
 618                 dev->rphy = NULL;
 619         }
 620         if (dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV) {
 621                 /* remove the phys and ports, everything else should be gone */
 622                 kfree(dev->ex_dev.ex_phy);
 623                 dev->ex_dev.ex_phy = NULL;
 624         }
 625         sas_unregister_common_dev(dev);
 626 }
 627
 628 void sas_unregister_domain_devices(struct asd_sas_port *port)
 629 {
 630         struct domain_device *dev, *n;
 631
 632         list_for_each_entry_safe_reverse(dev,n,&port->dev_list,dev_list_node)
 633                 sas_unregister_dev(dev);
 634
 635         port->port->rphy = NULL;
 636
 637 }
 638
 639 /* ---------- Discovery and Revalidation ---------- */
 640
 641 /**
 642  * sas_discover_domain -- discover the domain
 643  * @port: port to the domain of interest
 644  *
 645  * NOTE: this process _must_ quit (return) as soon as any connection
 646  * errors are encountered.  Connection recovery is done elsewhere.
 647  * Discover process only interrogates devices in order to discover the
 648  * domain.
 649  */
 650 static void sas_discover_domain(void *data)
 651 {
 652         int error = 0;
 653         struct asd_sas_port *port = data;
 654
 655         sas_begin_event(DISCE_DISCOVER_DOMAIN, &port->disc.disc_event_lock,
 656                         &port->disc.pending);
 657
 658         if (port->port_dev)
 659                 return ;
 660         else {
 661                 error = sas_get_port_device(port);
 662                 if (error)
 663                         return;
 664         }
 665
 666         SAS_DPRINTK("DOING DISCOVERY on port %d, pid:%d\n", port->id,
 667                     current->pid);
 668
 669         switch (port->port_dev->dev_type) {
 670         case SAS_END_DEV:
 671                 error = sas_discover_end_dev(port->port_dev);
 672                 break;
 673         case EDGE_DEV:
 674         case FANOUT_DEV:
 675                 error = sas_discover_root_expander(port->port_dev);
 676                 break;
 677         case SATA_DEV:
 678         case SATA_PM:
 679                 error = sas_discover_sata(port->port_dev);
 680                 break;
 681         default:
 682                 SAS_DPRINTK("unhandled device %d\n", port->port_dev->dev_type);
 683                 break;
 684         }
 685
 686         if (error) {
 687                 kfree(port->port_dev); /* not kobject_register-ed yet */
 688                 port->port_dev = NULL;
 689         }
 690
 691         SAS_DPRINTK("DONE DISCOVERY on port %d, pid:%d, result:%d\n", port->id,
 692                     current->pid, error);
 693 }
 694
 695 static void sas_revalidate_domain(void *data)
 696 {
 697         int res = 0;
 698         struct asd_sas_port *port = data;
 699
 700         sas_begin_event(DISCE_REVALIDATE_DOMAIN, &port->disc.disc_event_lock,
 701                         &port->disc.pending);
 702
 703         SAS_DPRINTK("REVALIDATING DOMAIN on port %d, pid:%d\n", port->id,
 704                     current->pid);
 705         if (port->port_dev)
 706                 res = sas_ex_revalidate_domain(port->port_dev);
 707
 708         SAS_DPRINTK("done REVALIDATING DOMAIN on port %d, pid:%d, res 0x%x\n",
 709                     port->id, current->pid, res);
 710 }
 711
 712 /* ---------- Events ---------- */
 713
 714 int sas_discover_event(struct asd_sas_port *port, enum discover_event ev)
 715 {
 716         struct sas_discovery *disc;
 717
 718         if (!port)
 719                 return 0;
 720         disc = &port->disc;
 721
 722         BUG_ON(ev >= DISC_NUM_EVENTS);
 723
 724         sas_queue_event(ev, &disc->disc_event_lock, &disc->pending,
 725                         &disc->disc_work[ev], port->ha->core.shost);
 726
 727         return 0;
 728 }
 729
 730 /**
 731  * sas_init_disc -- initialize the discovery struct in the port
 732  * @port: pointer to struct port
 733  *
 734  * Called when the ports are being initialized.
 735  */
 736 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *port)
 737 {
 738         int i;
 739
 740         static void (*sas_event_fns[DISC_NUM_EVENTS])(void *) = {
 741                 [DISCE_DISCOVER_DOMAIN] = sas_discover_domain,
 742                 [DISCE_REVALIDATE_DOMAIN] = sas_revalidate_domain,
 743         };
 744
 745         spin_lock_init(&disc->disc_event_lock);
 746         disc->pending = 0;
 747         for (i = 0; i < DISC_NUM_EVENTS; i++)
 748                 INIT_WORK(&disc->disc_work[i], sas_event_fns[i], port);
 749 }