drivers/scsi/pm8001/pm8001_sas.c

   1 /*
   2  * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
   3  *
   4  * Copyright (c) 2008-2009 USI Co., Ltd.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification.
  13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14  *    substantially similar to the "NO WARRANTY" disclaimer below
  15  *    ("Disclaimer") and any redistribution must be conditioned upon
  16  *    including a substantially similar Disclaimer requirement for further
  17  *    binary redistribution.
  18  * 3. Neither the names of the above-listed copyright holders nor the names
  19  *    of any contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * Alternatively, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2 as published by the Free
  24  * Software Foundation.
  25  *
  26  * NO WARRANTY
  27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  30  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  36  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGES.
  38  *
  39  */
  40
  41 #include <linux/slab.h>
  42 #include "pm8001_sas.h"
  43 #include "pm80xx_tracepoints.h"
  44
  45 /**
  46  * pm8001_find_tag - from sas task to find out  tag that belongs to this task
  47  * @task: the task sent to the LLDD
  48  * @tag: the found tag associated with the task
  49  */
  50 static int pm8001_find_tag(struct sas_task *task, u32 *tag)
  51 {
  52         if (task->lldd_task) {
  53                 struct pm8001_ccb_info *ccb;
  54                 ccb = task->lldd_task;
  55                 *tag = ccb->ccb_tag;
  56                 return 1;
  57         }
  58         return 0;
  59 }
  60
  61 /**
  62   * pm8001_tag_free - free the no more needed tag
  63   * @pm8001_ha: our hba struct
  64   * @tag: the found tag associated with the task
  65   */
  66 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
  67 {
  68         void *bitmap = pm8001_ha->rsvd_tags;
  69         unsigned long flags;
  70
  71         if (tag >= PM8001_RESERVE_SLOT)
  72                 return;
  73
  74         spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
  75         __clear_bit(tag, bitmap);
  76         spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  77 }
  78
  79 /**
  80   * pm8001_tag_alloc - allocate a empty tag for task used.
  81   * @pm8001_ha: our hba struct
  82   * @tag_out: the found empty tag .
  83   */
  84 int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
  85 {
  86         void *bitmap = pm8001_ha->rsvd_tags;
  87         unsigned long flags;
  88         unsigned int tag;
  89
  90         spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
  91         tag = find_first_zero_bit(bitmap, PM8001_RESERVE_SLOT);
  92         if (tag >= PM8001_RESERVE_SLOT) {
  93                 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  94                 return -SAS_QUEUE_FULL;
  95         }
  96         __set_bit(tag, bitmap);
  97         spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  98
  99         /* reserved tags are in the lower region of the tagset */
 100         *tag_out = tag;
 101         return 0;
 102 }
 103
 104 /**
 105  * pm8001_mem_alloc - allocate memory for pm8001.
 106  * @pdev: pci device.
 107  * @virt_addr: the allocated virtual address
 108  * @pphys_addr: DMA address for this device
 109  * @pphys_addr_hi: the physical address high byte address.
 110  * @pphys_addr_lo: the physical address low byte address.
 111  * @mem_size: memory size.
 112  * @align: requested byte alignment
 113  */
 114 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
 115         dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
 116         u32 *pphys_addr_lo, u32 mem_size, u32 align)
 117 {
 118         caddr_t mem_virt_alloc;
 119         dma_addr_t mem_dma_handle;
 120         u64 phys_align;
 121         u64 align_offset = 0;
 122         if (align)
 123                 align_offset = (dma_addr_t)align - 1;
 124         mem_virt_alloc = dma_alloc_coherent(&pdev->dev, mem_size + align,
 125                                             &mem_dma_handle, GFP_KERNEL);
 126         if (!mem_virt_alloc)
 127                 return -ENOMEM;
 128         *pphys_addr = mem_dma_handle;
 129         phys_align = (*pphys_addr + align_offset) & ~align_offset;
 130         *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
 131         *pphys_addr_hi = upper_32_bits(phys_align);
 132         *pphys_addr_lo = lower_32_bits(phys_align);
 133         return 0;
 134 }
 135
 136 /**
 137   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 138   * find out our hba struct.
 139   * @dev: the domain device which from sas layer.
 140   */
 141 static
 142 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 143 {
 144         struct sas_ha_struct *sha = dev->port->ha;
 145         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 146         return pm8001_ha;
 147 }
 148
 149 /**
 150   * pm8001_phy_control - this function should be registered to
 151   * sas_domain_function_template to provide libsas used, note: this is just
 152   * control the HBA phy rather than other expander phy if you want control
 153   * other phy, you should use SMP command.
 154   * @sas_phy: which phy in HBA phys.
 155   * @func: the operation.
 156   * @funcdata: always NULL.
 157   */
 158 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 159         void *funcdata)
 160 {
 161         int rc = 0, phy_id = sas_phy->id;
 162         struct pm8001_hba_info *pm8001_ha = NULL;
 163         struct sas_phy_linkrates *rates;
 164         struct pm8001_phy *phy;
 165         DECLARE_COMPLETION_ONSTACK(completion);
 166         unsigned long flags;
 167         pm8001_ha = sas_phy->ha->lldd_ha;
 168         phy = &pm8001_ha->phy[phy_id];
 169         pm8001_ha->phy[phy_id].enable_completion = &completion;
 170
 171         if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
 172                 /*
 173                  * If the controller is in fatal error state,
 174                  * we will not get a response from the controller
 175                  */
 176                 pm8001_dbg(pm8001_ha, FAIL,
 177                            "Phy control failed due to fatal errors\n");
 178                 return -EFAULT;
 179         }
 180
 181         switch (func) {
 182         case PHY_FUNC_SET_LINK_RATE:
 183                 rates = funcdata;
 184                 if (rates->minimum_linkrate) {
 185                         pm8001_ha->phy[phy_id].minimum_linkrate =
 186                                 rates->minimum_linkrate;
 187                 }
 188                 if (rates->maximum_linkrate) {
 189                         pm8001_ha->phy[phy_id].maximum_linkrate =
 190                                 rates->maximum_linkrate;
 191                 }
 192                 if (pm8001_ha->phy[phy_id].phy_state ==  PHY_LINK_DISABLE) {
 193                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 194                         wait_for_completion(&completion);
 195                 }
 196                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 197                                               PHY_LINK_RESET);
 198                 break;
 199         case PHY_FUNC_HARD_RESET:
 200                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 201                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 202                         wait_for_completion(&completion);
 203                 }
 204                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 205                                               PHY_HARD_RESET);
 206                 break;
 207         case PHY_FUNC_LINK_RESET:
 208                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 209                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 210                         wait_for_completion(&completion);
 211                 }
 212                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 213                                               PHY_LINK_RESET);
 214                 break;
 215         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 216                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 217                                               PHY_LINK_RESET);
 218                 break;
 219         case PHY_FUNC_DISABLE:
 220                 if (pm8001_ha->chip_id != chip_8001) {
 221                         if (pm8001_ha->phy[phy_id].phy_state ==
 222                                 PHY_STATE_LINK_UP_SPCV) {
 223                                 sas_phy_disconnected(&phy->sas_phy);
 224                                 sas_notify_phy_event(&phy->sas_phy,
 225                                         PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
 226                                 phy->phy_attached = 0;
 227                         }
 228                 } else {
 229                         if (pm8001_ha->phy[phy_id].phy_state ==
 230                                 PHY_STATE_LINK_UP_SPC) {
 231                                 sas_phy_disconnected(&phy->sas_phy);
 232                                 sas_notify_phy_event(&phy->sas_phy,
 233                                         PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
 234                                 phy->phy_attached = 0;
 235                         }
 236                 }
 237                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 238                 break;
 239         case PHY_FUNC_GET_EVENTS:
 240                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 241                 if (pm8001_ha->chip_id == chip_8001) {
 242                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 243                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 244                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 245                                 return -EINVAL;
 246                         }
 247                 }
 248                 {
 249                         struct sas_phy *phy = sas_phy->phy;
 250                         u32 __iomem *qp = pm8001_ha->io_mem[2].memvirtaddr
 251                                 + 0x1034 + (0x4000 * (phy_id & 3));
 252
 253                         phy->invalid_dword_count = readl(qp);
 254                         phy->running_disparity_error_count = readl(&qp[1]);
 255                         phy->loss_of_dword_sync_count = readl(&qp[3]);
 256                         phy->phy_reset_problem_count = readl(&qp[4]);
 257                 }
 258                 if (pm8001_ha->chip_id == chip_8001)
 259                         pm8001_bar4_shift(pm8001_ha, 0);
 260                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 261                 return 0;
 262         default:
 263                 pm8001_dbg(pm8001_ha, DEVIO, "func 0x%x\n", func);
 264                 rc = -EOPNOTSUPP;
 265         }
 266         msleep(300);
 267         return rc;
 268 }
 269
 270 /**
 271   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 272   * command to HBA.
 273   * @shost: the scsi host data.
 274   */
 275 void pm8001_scan_start(struct Scsi_Host *shost)
 276 {
 277         int i;
 278         struct pm8001_hba_info *pm8001_ha;
 279         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 280         DECLARE_COMPLETION_ONSTACK(completion);
 281         pm8001_ha = sha->lldd_ha;
 282         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 283         if (pm8001_ha->chip_id == chip_8001)
 284                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 285         for (i = 0; i < pm8001_ha->chip->n_phy; ++i) {
 286                 pm8001_ha->phy[i].enable_completion = &completion;
 287                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 288                 wait_for_completion(&completion);
 289                 msleep(300);
 290         }
 291 }
 292
 293 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 294 {
 295         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 296
 297         /* give the phy enabling interrupt event time to come in (1s
 298         * is empirically about all it takes) */
 299         if (time < HZ)
 300                 return 0;
 301         /* Wait for discovery to finish */
 302         sas_drain_work(ha);
 303         return 1;
 304 }
 305
 306 /**
 307   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 308   * @pm8001_ha: our hba card information
 309   * @ccb: the ccb which attached to smp task
 310   */
 311 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 312         struct pm8001_ccb_info *ccb)
 313 {
 314         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 315 }
 316
 317 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 318 {
 319         struct ata_queued_cmd *qc = task->uldd_task;
 320
 321         if (qc && ata_is_ncq(qc->tf.protocol)) {
 322                 *tag = qc->tag;
 323                 return 1;
 324         }
 325
 326         return 0;
 327 }
 328
 329 /**
 330   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 331   * @pm8001_ha: our hba card information
 332   * @ccb: the ccb which attached to sata task
 333   */
 334 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 335         struct pm8001_ccb_info *ccb)
 336 {
 337         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 338 }
 339
 340 /**
 341   * pm8001_task_prep_internal_abort - the dispatcher function, prepare data
 342   *                                   for internal abort task
 343   * @pm8001_ha: our hba card information
 344   * @ccb: the ccb which attached to sata task
 345   */
 346 static int pm8001_task_prep_internal_abort(struct pm8001_hba_info *pm8001_ha,
 347                                            struct pm8001_ccb_info *ccb)
 348 {
 349         return PM8001_CHIP_DISP->task_abort(pm8001_ha, ccb);
 350 }
 351
 352 /**
 353   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 354   * @pm8001_ha: our hba card information
 355   * @ccb: the ccb which attached to TM
 356   * @tmf: the task management IU
 357   */
 358 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 359         struct pm8001_ccb_info *ccb, struct sas_tmf_task *tmf)
 360 {
 361         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 362 }
 363
 364 /**
 365   * pm8001_task_prep_ssp - the dispatcher function, prepare ssp data for ssp task
 366   * @pm8001_ha: our hba card information
 367   * @ccb: the ccb which attached to ssp task
 368   */
 369 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 370         struct pm8001_ccb_info *ccb)
 371 {
 372         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 373 }
 374
 375  /* Find the local port id that's attached to this device */
 376 static int sas_find_local_port_id(struct domain_device *dev)
 377 {
 378         struct domain_device *pdev = dev->parent;
 379
 380         /* Directly attached device */
 381         if (!pdev)
 382                 return dev->port->id;
 383         while (pdev) {
 384                 struct domain_device *pdev_p = pdev->parent;
 385                 if (!pdev_p)
 386                         return pdev->port->id;
 387                 pdev = pdev->parent;
 388         }
 389         return 0;
 390 }
 391
 392 #define DEV_IS_GONE(pm8001_dev) \
 393         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 394
 395
 396 static int pm8001_deliver_command(struct pm8001_hba_info *pm8001_ha,
 397                                   struct pm8001_ccb_info *ccb)
 398 {
 399         struct sas_task *task = ccb->task;
 400         enum sas_protocol task_proto = task->task_proto;
 401         struct sas_tmf_task *tmf = task->tmf;
 402         int is_tmf = !!tmf;
 403
 404         switch (task_proto) {
 405         case SAS_PROTOCOL_SMP:
 406                 return pm8001_task_prep_smp(pm8001_ha, ccb);
 407         case SAS_PROTOCOL_SSP:
 408                 if (is_tmf)
 409                         return pm8001_task_prep_ssp_tm(pm8001_ha, ccb, tmf);
 410                 return pm8001_task_prep_ssp(pm8001_ha, ccb);
 411         case SAS_PROTOCOL_SATA:
 412         case SAS_PROTOCOL_STP:
 413                 return pm8001_task_prep_ata(pm8001_ha, ccb);
 414         case SAS_PROTOCOL_INTERNAL_ABORT:
 415                 return pm8001_task_prep_internal_abort(pm8001_ha, ccb);
 416         default:
 417                 dev_err(pm8001_ha->dev, "unknown sas_task proto: 0x%x\n",
 418                         task_proto);
 419         }
 420
 421         return -EINVAL;
 422 }
 423
 424 /**
 425   * pm8001_queue_command - register for upper layer used, all IO commands sent
 426   * to HBA are from this interface.
 427   * @task: the task to be execute.
 428   * @gfp_flags: gfp_flags
 429   */
 430 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 431 {
 432         struct task_status_struct *ts = &task->task_status;
 433         enum sas_protocol task_proto = task->task_proto;
 434         struct domain_device *dev = task->dev;
 435         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 436         bool internal_abort = sas_is_internal_abort(task);
 437         struct pm8001_hba_info *pm8001_ha;
 438         struct pm8001_port *port = NULL;
 439         struct pm8001_ccb_info *ccb;
 440         unsigned long flags;
 441         u32 n_elem = 0;
 442         int rc = 0;
 443
 444         if (!internal_abort && !dev->port) {
 445                 ts->resp = SAS_TASK_UNDELIVERED;
 446                 ts->stat = SAS_PHY_DOWN;
 447                 if (dev->dev_type != SAS_SATA_DEV)
 448                         task->task_done(task);
 449                 return 0;
 450         }
 451
 452         pm8001_ha = pm8001_find_ha_by_dev(dev);
 453         if (pm8001_ha->controller_fatal_error) {
 454                 ts->resp = SAS_TASK_UNDELIVERED;
 455                 task->task_done(task);
 456                 return 0;
 457         }
 458
 459         pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec device\n");
 460
 461         spin_lock_irqsave(&pm8001_ha->lock, flags);
 462
 463         pm8001_dev = dev->lldd_dev;
 464         port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 465
 466         if (!internal_abort &&
 467             (DEV_IS_GONE(pm8001_dev) || !port->port_attached)) {
 468                 ts->resp = SAS_TASK_UNDELIVERED;
 469                 ts->stat = SAS_PHY_DOWN;
 470                 if (sas_protocol_ata(task_proto)) {
 471                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 472                         task->task_done(task);
 473                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 474                 } else {
 475                         task->task_done(task);
 476                 }
 477                 rc = -ENODEV;
 478                 goto err_out;
 479         }
 480
 481         ccb = pm8001_ccb_alloc(pm8001_ha, pm8001_dev, task);
 482         if (!ccb) {
 483                 rc = -SAS_QUEUE_FULL;
 484                 goto err_out;
 485         }
 486
 487         if (!sas_protocol_ata(task_proto)) {
 488                 if (task->num_scatter) {
 489                         n_elem = dma_map_sg(pm8001_ha->dev, task->scatter,
 490                                             task->num_scatter, task->data_dir);
 491                         if (!n_elem) {
 492                                 rc = -ENOMEM;
 493                                 goto err_out_ccb;
 494                         }
 495                 }
 496         } else {
 497                 n_elem = task->num_scatter;
 498         }
 499
 500         task->lldd_task = ccb;
 501         ccb->n_elem = n_elem;
 502
 503         atomic_inc(&pm8001_dev->running_req);
 504
 505         rc = pm8001_deliver_command(pm8001_ha, ccb);
 506         if (rc) {
 507                 atomic_dec(&pm8001_dev->running_req);
 508                 if (!sas_protocol_ata(task_proto) && n_elem)
 509                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 510                                      task->num_scatter, task->data_dir);
 511 err_out_ccb:
 512                 pm8001_ccb_free(pm8001_ha, ccb);
 513
 514 err_out:
 515                 pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec failed[%d]!\n", rc);
 516         }
 517
 518         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 519
 520         return rc;
 521 }
 522
 523 /**
 524   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 525   * @pm8001_ha: our hba card information
 526   * @ccb: the ccb which attached to ssp task to free
 527   */
 528 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 529                           struct pm8001_ccb_info *ccb)
 530 {
 531         struct sas_task *task = ccb->task;
 532         struct ata_queued_cmd *qc;
 533         struct pm8001_device *pm8001_dev;
 534
 535         if (!task)
 536                 return;
 537
 538         if (!sas_protocol_ata(task->task_proto) && ccb->n_elem)
 539                 dma_unmap_sg(pm8001_ha->dev, task->scatter,
 540                              task->num_scatter, task->data_dir);
 541
 542         switch (task->task_proto) {
 543         case SAS_PROTOCOL_SMP:
 544                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 545                         DMA_FROM_DEVICE);
 546                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 547                         DMA_TO_DEVICE);
 548                 break;
 549
 550         case SAS_PROTOCOL_SATA:
 551         case SAS_PROTOCOL_STP:
 552         case SAS_PROTOCOL_SSP:
 553         default:
 554                 /* do nothing */
 555                 break;
 556         }
 557
 558         if (sas_protocol_ata(task->task_proto)) {
 559                 /* For SCSI/ATA commands uldd_task points to ata_queued_cmd */
 560                 qc = task->uldd_task;
 561                 pm8001_dev = ccb->device;
 562                 trace_pm80xx_request_complete(pm8001_ha->id,
 563                         pm8001_dev ? pm8001_dev->attached_phy : PM8001_MAX_PHYS,
 564                         ccb->ccb_tag, 0 /* ctlr_opcode not known */,
 565                         qc ? qc->tf.command : 0, // ata opcode
 566                         pm8001_dev ? atomic_read(&pm8001_dev->running_req) : -1);
 567         }
 568
 569         task->lldd_task = NULL;
 570         pm8001_ccb_free(pm8001_ha, ccb);
 571 }
 572
 573 /**
 574  * pm8001_alloc_dev - find a empty pm8001_device
 575  * @pm8001_ha: our hba card information
 576  */
 577 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 578 {
 579         u32 dev;
 580         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 581                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 582                         pm8001_ha->devices[dev].id = dev;
 583                         return &pm8001_ha->devices[dev];
 584                 }
 585         }
 586         if (dev == PM8001_MAX_DEVICES) {
 587                 pm8001_dbg(pm8001_ha, FAIL,
 588                            "max support %d devices, ignore ..\n",
 589                            PM8001_MAX_DEVICES);
 590         }
 591         return NULL;
 592 }
 593 /**
 594   * pm8001_find_dev - find a matching pm8001_device
 595   * @pm8001_ha: our hba card information
 596   * @device_id: device ID to match against
 597   */
 598 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 599                                         u32 device_id)
 600 {
 601         u32 dev;
 602         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 603                 if (pm8001_ha->devices[dev].device_id == device_id)
 604                         return &pm8001_ha->devices[dev];
 605         }
 606         if (dev == PM8001_MAX_DEVICES) {
 607                 pm8001_dbg(pm8001_ha, FAIL, "NO MATCHING DEVICE FOUND !!!\n");
 608         }
 609         return NULL;
 610 }
 611
 612 void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 613 {
 614         u32 id = pm8001_dev->id;
 615         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 616         pm8001_dev->id = id;
 617         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 618         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 619         pm8001_dev->sas_device = NULL;
 620 }
 621
 622 /**
 623   * pm8001_dev_found_notify - libsas notify a device is found.
 624   * @dev: the device structure which sas layer used.
 625   *
 626   * when libsas find a sas domain device, it should tell the LLDD that
 627   * device is found, and then LLDD register this device to HBA firmware
 628   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 629   * device ID(according to device's sas address) and returned it to LLDD. From
 630   * now on, we communicate with HBA FW with the device ID which HBA assigned
 631   * rather than sas address. it is the necessary step for our HBA but it is
 632   * the optional for other HBA driver.
 633   */
 634 static int pm8001_dev_found_notify(struct domain_device *dev)
 635 {
 636         unsigned long flags = 0;
 637         int res = 0;
 638         struct pm8001_hba_info *pm8001_ha = NULL;
 639         struct domain_device *parent_dev = dev->parent;
 640         struct pm8001_device *pm8001_device;
 641         DECLARE_COMPLETION_ONSTACK(completion);
 642         u32 flag = 0;
 643         pm8001_ha = pm8001_find_ha_by_dev(dev);
 644         spin_lock_irqsave(&pm8001_ha->lock, flags);
 645
 646         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 647         if (!pm8001_device) {
 648                 res = -1;
 649                 goto found_out;
 650         }
 651         pm8001_device->sas_device = dev;
 652         dev->lldd_dev = pm8001_device;
 653         pm8001_device->dev_type = dev->dev_type;
 654         pm8001_device->dcompletion = &completion;
 655         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 656                 int phy_id;
 657
 658                 phy_id = sas_find_attached_phy_id(&parent_dev->ex_dev, dev);
 659                 if (phy_id < 0) {
 660                         pm8001_dbg(pm8001_ha, FAIL,
 661                                    "Error: no attached dev:%016llx at ex:%016llx.\n",
 662                                    SAS_ADDR(dev->sas_addr),
 663                                    SAS_ADDR(parent_dev->sas_addr));
 664                         res = phy_id;
 665                 } else {
 666                         pm8001_device->attached_phy = phy_id;
 667                 }
 668         } else {
 669                 if (dev->dev_type == SAS_SATA_DEV) {
 670                         pm8001_device->attached_phy =
 671                                 dev->rphy->identify.phy_identifier;
 672                         flag = 1; /* directly sata */
 673                 }
 674         } /*register this device to HBA*/
 675         pm8001_dbg(pm8001_ha, DISC, "Found device\n");
 676         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 677         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 678         wait_for_completion(&completion);
 679         if (dev->dev_type == SAS_END_DEVICE)
 680                 msleep(50);
 681         pm8001_ha->flags = PM8001F_RUN_TIME;
 682         return 0;
 683 found_out:
 684         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 685         return res;
 686 }
 687
 688 int pm8001_dev_found(struct domain_device *dev)
 689 {
 690         return pm8001_dev_found_notify(dev);
 691 }
 692
 693 #define PM8001_TASK_TIMEOUT 20
 694
 695 /**
 696   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 697   * @dev: the device structure which sas layer used.
 698   */
 699 static void pm8001_dev_gone_notify(struct domain_device *dev)
 700 {
 701         unsigned long flags = 0;
 702         struct pm8001_hba_info *pm8001_ha;
 703         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 704
 705         pm8001_ha = pm8001_find_ha_by_dev(dev);
 706         spin_lock_irqsave(&pm8001_ha->lock, flags);
 707         if (pm8001_dev) {
 708                 u32 device_id = pm8001_dev->device_id;
 709
 710                 pm8001_dbg(pm8001_ha, DISC, "found dev[%d:%x] is gone.\n",
 711                            pm8001_dev->device_id, pm8001_dev->dev_type);
 712                 if (atomic_read(&pm8001_dev->running_req)) {
 713                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 714                         sas_execute_internal_abort_dev(dev, 0, NULL);
 715                         while (atomic_read(&pm8001_dev->running_req))
 716                                 msleep(20);
 717                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 718                 }
 719                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 720                 pm8001_free_dev(pm8001_dev);
 721         } else {
 722                 pm8001_dbg(pm8001_ha, DISC, "Found dev has gone.\n");
 723         }
 724         dev->lldd_dev = NULL;
 725         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 726 }
 727
 728 void pm8001_dev_gone(struct domain_device *dev)
 729 {
 730         pm8001_dev_gone_notify(dev);
 731 }
 732
 733 /* retry commands by ha, by task and/or by device */
 734 void pm8001_open_reject_retry(
 735         struct pm8001_hba_info *pm8001_ha,
 736         struct sas_task *task_to_close,
 737         struct pm8001_device *device_to_close)
 738 {
 739         int i;
 740         unsigned long flags;
 741
 742         if (pm8001_ha == NULL)
 743                 return;
 744
 745         spin_lock_irqsave(&pm8001_ha->lock, flags);
 746
 747         for (i = 0; i < PM8001_MAX_CCB; i++) {
 748                 struct sas_task *task;
 749                 struct task_status_struct *ts;
 750                 struct pm8001_device *pm8001_dev;
 751                 unsigned long flags1;
 752                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 753
 754                 if (ccb->ccb_tag == PM8001_INVALID_TAG)
 755                         continue;
 756
 757                 pm8001_dev = ccb->device;
 758                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 759                         continue;
 760                 if (!device_to_close) {
 761                         uintptr_t d = (uintptr_t)pm8001_dev
 762                                         - (uintptr_t)&pm8001_ha->devices;
 763                         if (((d % sizeof(*pm8001_dev)) != 0)
 764                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 765                                 continue;
 766                 } else if (pm8001_dev != device_to_close)
 767                         continue;
 768                 task = ccb->task;
 769                 if (!task || !task->task_done)
 770                         continue;
 771                 if (task_to_close && (task != task_to_close))
 772                         continue;
 773                 ts = &task->task_status;
 774                 ts->resp = SAS_TASK_COMPLETE;
 775                 /* Force the midlayer to retry */
 776                 ts->stat = SAS_OPEN_REJECT;
 777                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 778                 if (pm8001_dev)
 779                         atomic_dec(&pm8001_dev->running_req);
 780                 spin_lock_irqsave(&task->task_state_lock, flags1);
 781                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 782                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 783                 if (unlikely((task->task_state_flags
 784                                 & SAS_TASK_STATE_ABORTED))) {
 785                         spin_unlock_irqrestore(&task->task_state_lock,
 786                                 flags1);
 787                         pm8001_ccb_task_free(pm8001_ha, ccb);
 788                 } else {
 789                         spin_unlock_irqrestore(&task->task_state_lock,
 790                                 flags1);
 791                         pm8001_ccb_task_free(pm8001_ha, ccb);
 792                         mb();/* in order to force CPU ordering */
 793                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 794                         task->task_done(task);
 795                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 796                 }
 797         }
 798
 799         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 800 }
 801
 802 /**
 803  * pm8001_I_T_nexus_reset() - reset the initiator/target connection
 804  * @dev: the device structure for the device to reset.
 805  *
 806  * Standard mandates link reset for ATA (type 0) and hard reset for
 807  * SSP (type 1), only for RECOVERY
 808  */
 809 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 810 {
 811         int rc = TMF_RESP_FUNC_FAILED;
 812         struct pm8001_device *pm8001_dev;
 813         struct pm8001_hba_info *pm8001_ha;
 814         struct sas_phy *phy;
 815
 816         if (!dev || !dev->lldd_dev)
 817                 return -ENODEV;
 818
 819         pm8001_dev = dev->lldd_dev;
 820         pm8001_ha = pm8001_find_ha_by_dev(dev);
 821         phy = sas_get_local_phy(dev);
 822
 823         if (dev_is_sata(dev)) {
 824                 if (scsi_is_sas_phy_local(phy)) {
 825                         rc = 0;
 826                         goto out;
 827                 }
 828                 rc = sas_phy_reset(phy, 1);
 829                 if (rc) {
 830                         pm8001_dbg(pm8001_ha, EH,
 831                                    "phy reset failed for device %x\n"
 832                                    "with rc %d\n", pm8001_dev->device_id, rc);
 833                         rc = TMF_RESP_FUNC_FAILED;
 834                         goto out;
 835                 }
 836                 msleep(2000);
 837                 rc = sas_execute_internal_abort_dev(dev, 0, NULL);
 838                 if (rc) {
 839                         pm8001_dbg(pm8001_ha, EH, "task abort failed %x\n"
 840                                    "with rc %d\n", pm8001_dev->device_id, rc);
 841                         rc = TMF_RESP_FUNC_FAILED;
 842                 }
 843         } else {
 844                 rc = sas_phy_reset(phy, 1);
 845                 msleep(2000);
 846         }
 847         pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
 848                    pm8001_dev->device_id, rc);
 849  out:
 850         sas_put_local_phy(phy);
 851         return rc;
 852 }
 853
 854 /*
 855 * This function handle the IT_NEXUS_XXX event or completion
 856 * status code for SSP/SATA/SMP I/O request.
 857 */
 858 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
 859 {
 860         int rc = TMF_RESP_FUNC_FAILED;
 861         struct pm8001_device *pm8001_dev;
 862         struct pm8001_hba_info *pm8001_ha;
 863         struct sas_phy *phy;
 864
 865         if (!dev || !dev->lldd_dev)
 866                 return -1;
 867
 868         pm8001_dev = dev->lldd_dev;
 869         pm8001_ha = pm8001_find_ha_by_dev(dev);
 870
 871         pm8001_dbg(pm8001_ha, EH, "I_T_Nexus handler invoked !!\n");
 872
 873         phy = sas_get_local_phy(dev);
 874
 875         if (dev_is_sata(dev)) {
 876                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
 877                 if (scsi_is_sas_phy_local(phy)) {
 878                         rc = 0;
 879                         goto out;
 880                 }
 881                 /* send internal ssp/sata/smp abort command to FW */
 882                 sas_execute_internal_abort_dev(dev, 0, NULL);
 883                 msleep(100);
 884
 885                 /* deregister the target device */
 886                 pm8001_dev_gone_notify(dev);
 887                 msleep(200);
 888
 889                 /*send phy reset to hard reset target */
 890                 rc = sas_phy_reset(phy, 1);
 891                 msleep(2000);
 892                 pm8001_dev->setds_completion = &completion_setstate;
 893
 894                 wait_for_completion(&completion_setstate);
 895         } else {
 896                 /* send internal ssp/sata/smp abort command to FW */
 897                 sas_execute_internal_abort_dev(dev, 0, NULL);
 898                 msleep(100);
 899
 900                 /* deregister the target device */
 901                 pm8001_dev_gone_notify(dev);
 902                 msleep(200);
 903
 904                 /*send phy reset to hard reset target */
 905                 rc = sas_phy_reset(phy, 1);
 906                 msleep(2000);
 907         }
 908         pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
 909                    pm8001_dev->device_id, rc);
 910 out:
 911         sas_put_local_phy(phy);
 912
 913         return rc;
 914 }
 915 /* mandatory SAM-3, the task reset the specified LUN*/
 916 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
 917 {
 918         int rc = TMF_RESP_FUNC_FAILED;
 919         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 920         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 921         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 922
 923         if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
 924                 /*
 925                  * If the controller is in fatal error state,
 926                  * we will not get a response from the controller
 927                  */
 928                 pm8001_dbg(pm8001_ha, FAIL,
 929                            "LUN reset failed due to fatal errors\n");
 930                 return rc;
 931         }
 932
 933         if (dev_is_sata(dev)) {
 934                 struct sas_phy *phy = sas_get_local_phy(dev);
 935                 sas_execute_internal_abort_dev(dev, 0, NULL);
 936                 rc = sas_phy_reset(phy, 1);
 937                 sas_put_local_phy(phy);
 938                 pm8001_dev->setds_completion = &completion_setstate;
 939                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 940                         pm8001_dev, DS_OPERATIONAL);
 941                 wait_for_completion(&completion_setstate);
 942         } else {
 943                 rc = sas_lu_reset(dev, lun);
 944         }
 945         /* If failed, fall-through I_T_Nexus reset */
 946         pm8001_dbg(pm8001_ha, EH, "for device[%x]:rc=%d\n",
 947                    pm8001_dev->device_id, rc);
 948         return rc;
 949 }
 950
 951 /* optional SAM-3 */
 952 int pm8001_query_task(struct sas_task *task)
 953 {
 954         u32 tag = 0xdeadbeef;
 955         int rc = TMF_RESP_FUNC_FAILED;
 956         if (unlikely(!task || !task->lldd_task || !task->dev))
 957                 return rc;
 958
 959         if (task->task_proto & SAS_PROTOCOL_SSP) {
 960                 struct scsi_cmnd *cmnd = task->uldd_task;
 961                 struct domain_device *dev = task->dev;
 962                 struct pm8001_hba_info *pm8001_ha =
 963                         pm8001_find_ha_by_dev(dev);
 964
 965                 rc = pm8001_find_tag(task, &tag);
 966                 if (rc == 0) {
 967                         rc = TMF_RESP_FUNC_FAILED;
 968                         return rc;
 969                 }
 970                 pm8001_dbg(pm8001_ha, EH, "Query:[%16ph]\n", cmnd->cmnd);
 971
 972                 rc = sas_query_task(task, tag);
 973                 switch (rc) {
 974                 /* The task is still in Lun, release it then */
 975                 case TMF_RESP_FUNC_SUCC:
 976                         pm8001_dbg(pm8001_ha, EH,
 977                                    "The task is still in Lun\n");
 978                         break;
 979                 /* The task is not in Lun or failed, reset the phy */
 980                 case TMF_RESP_FUNC_FAILED:
 981                 case TMF_RESP_FUNC_COMPLETE:
 982                         pm8001_dbg(pm8001_ha, EH,
 983                                    "The task is not in Lun or failed, reset the phy\n");
 984                         break;
 985                 }
 986         }
 987         pr_err("pm80xx: rc= %d\n", rc);
 988         return rc;
 989 }
 990
 991 /*  mandatory SAM-3, still need free task/ccb info, abort the specified task */
 992 int pm8001_abort_task(struct sas_task *task)
 993 {
 994         struct pm8001_ccb_info *ccb = task->lldd_task;
 995         unsigned long flags;
 996         u32 tag;
 997         struct domain_device *dev ;
 998         struct pm8001_hba_info *pm8001_ha;
 999         struct pm8001_device *pm8001_dev;
1000         int rc = TMF_RESP_FUNC_FAILED, ret;
1001         u32 phy_id, port_id;
1002         struct sas_task_slow slow_task;
1003
1004         if (!task->lldd_task || !task->dev)
1005                 return TMF_RESP_FUNC_FAILED;
1006
1007         dev = task->dev;
1008         pm8001_dev = dev->lldd_dev;
1009         pm8001_ha = pm8001_find_ha_by_dev(dev);
1010         phy_id = pm8001_dev->attached_phy;
1011
1012         if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
1013                 // If the controller is seeing fatal errors
1014                 // abort task will not get a response from the controller
1015                 return TMF_RESP_FUNC_FAILED;
1016         }
1017
1018         ret = pm8001_find_tag(task, &tag);
1019         if (ret == 0) {
1020                 pm8001_info(pm8001_ha, "no tag for task:%p\n", task);
1021                 return TMF_RESP_FUNC_FAILED;
1022         }
1023         spin_lock_irqsave(&task->task_state_lock, flags);
1024         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1025                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1026                 return TMF_RESP_FUNC_COMPLETE;
1027         }
1028         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1029         if (task->slow_task == NULL) {
1030                 init_completion(&slow_task.completion);
1031                 task->slow_task = &slow_task;
1032         }
1033         spin_unlock_irqrestore(&task->task_state_lock, flags);
1034         if (task->task_proto & SAS_PROTOCOL_SSP) {
1035                 rc = sas_abort_task(task, tag);
1036                 sas_execute_internal_abort_single(dev, tag, 0, NULL);
1037         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1038                 task->task_proto & SAS_PROTOCOL_STP) {
1039                 if (pm8001_ha->chip_id == chip_8006) {
1040                         DECLARE_COMPLETION_ONSTACK(completion_reset);
1041                         DECLARE_COMPLETION_ONSTACK(completion);
1042                         struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1043                         port_id = phy->port->port_id;
1044
1045                         /* 1. Set Device state as Recovery */
1046                         pm8001_dev->setds_completion = &completion;
1047                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1048                                 pm8001_dev, DS_IN_RECOVERY);
1049                         wait_for_completion(&completion);
1050
1051                         /* 2. Send Phy Control Hard Reset */
1052                         reinit_completion(&completion);
1053                         phy->port_reset_status = PORT_RESET_TMO;
1054                         phy->reset_success = false;
1055                         phy->enable_completion = &completion;
1056                         phy->reset_completion = &completion_reset;
1057                         ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1058                                 PHY_HARD_RESET);
1059                         if (ret) {
1060                                 phy->enable_completion = NULL;
1061                                 phy->reset_completion = NULL;
1062                                 goto out;
1063                         }
1064
1065                         /* In the case of the reset timeout/fail we still
1066                          * abort the command at the firmware. The assumption
1067                          * here is that the drive is off doing something so
1068                          * that it's not processing requests, and we want to
1069                          * avoid getting a completion for this and either
1070                          * leaking the task in libsas or losing the race and
1071                          * getting a double free.
1072                          */
1073                         pm8001_dbg(pm8001_ha, MSG,
1074                                    "Waiting for local phy ctl\n");
1075                         ret = wait_for_completion_timeout(&completion,
1076                                         PM8001_TASK_TIMEOUT * HZ);
1077                         if (!ret || !phy->reset_success) {
1078                                 phy->enable_completion = NULL;
1079                                 phy->reset_completion = NULL;
1080                         } else {
1081                                 /* 3. Wait for Port Reset complete or
1082                                  * Port reset TMO
1083                                  */
1084                                 pm8001_dbg(pm8001_ha, MSG,
1085                                            "Waiting for Port reset\n");
1086                                 ret = wait_for_completion_timeout(
1087                                         &completion_reset,
1088                                         PM8001_TASK_TIMEOUT * HZ);
1089                                 if (!ret)
1090                                         phy->reset_completion = NULL;
1091                                 WARN_ON(phy->port_reset_status ==
1092                                                 PORT_RESET_TMO);
1093                                 if (phy->port_reset_status == PORT_RESET_TMO) {
1094                                         pm8001_dev_gone_notify(dev);
1095                                         PM8001_CHIP_DISP->hw_event_ack_req(
1096                                                 pm8001_ha, 0,
1097                                                 0x07, /*HW_EVENT_PHY_DOWN ack*/
1098                                                 port_id, phy_id, 0, 0);
1099                                         goto out;
1100                                 }
1101                         }
1102
1103                         /*
1104                          * 4. SATA Abort ALL
1105                          * we wait for the task to be aborted so that the task
1106                          * is removed from the ccb. on success the caller is
1107                          * going to free the task.
1108                          */
1109                         ret = sas_execute_internal_abort_dev(dev, 0, NULL);
1110                         if (ret)
1111                                 goto out;
1112                         ret = wait_for_completion_timeout(
1113                                 &task->slow_task->completion,
1114                                 PM8001_TASK_TIMEOUT * HZ);
1115                         if (!ret)
1116                                 goto out;
1117
1118                         /* 5. Set Device State as Operational */
1119                         reinit_completion(&completion);
1120                         pm8001_dev->setds_completion = &completion;
1121                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1122                                 pm8001_dev, DS_OPERATIONAL);
1123                         wait_for_completion(&completion);
1124                 } else {
1125                         /*
1126                          * Ensure that if we see a completion for the ccb
1127                          * associated with the task which we are trying to
1128                          * abort then we should not touch the sas_task as it
1129                          * may race with libsas freeing it when return here.
1130                          */
1131                         ccb->task = NULL;
1132                         ret = sas_execute_internal_abort_single(dev, tag, 0, NULL);
1133                 }
1134                 rc = TMF_RESP_FUNC_COMPLETE;
1135         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1136                 /* SMP */
1137                 rc = sas_execute_internal_abort_single(dev, tag, 0, NULL);
1138
1139         }
1140 out:
1141         spin_lock_irqsave(&task->task_state_lock, flags);
1142         if (task->slow_task == &slow_task)
1143                 task->slow_task = NULL;
1144         spin_unlock_irqrestore(&task->task_state_lock, flags);
1145         if (rc != TMF_RESP_FUNC_COMPLETE)
1146                 pm8001_info(pm8001_ha, "rc= %d\n", rc);
1147         return rc;
1148 }
1149
1150 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1151 {
1152         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1153         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1154
1155         pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",
1156                    pm8001_dev->device_id);
1157         return sas_clear_task_set(dev, lun);
1158 }
1159
1160 void pm8001_port_formed(struct asd_sas_phy *sas_phy)
1161 {
1162         struct sas_ha_struct *sas_ha = sas_phy->ha;
1163         struct pm8001_hba_info *pm8001_ha = sas_ha->lldd_ha;
1164         struct pm8001_phy *phy = sas_phy->lldd_phy;
1165         struct asd_sas_port *sas_port = sas_phy->port;
1166         struct pm8001_port *port = phy->port;
1167
1168         if (!sas_port) {
1169                 pm8001_dbg(pm8001_ha, FAIL, "Received null port\n");
1170                 return;
1171         }
1172         sas_port->lldd_port = port;
1173 }
1174
1175 void pm8001_setds_completion(struct domain_device *dev)
1176 {
1177         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1178         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1179         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1180
1181         if (pm8001_ha->chip_id != chip_8001) {
1182                 pm8001_dev->setds_completion = &completion_setstate;
1183                 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1184                         pm8001_dev, DS_OPERATIONAL);
1185                 wait_for_completion(&completion_setstate);
1186         }
1187 }
1188
1189 void pm8001_tmf_aborted(struct sas_task *task)
1190 {
1191         struct pm8001_ccb_info *ccb = task->lldd_task;
1192
1193         if (ccb)
1194                 ccb->task = NULL;
1195 }