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
 170         if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
 171                 /*
 172                  * If the controller is in fatal error state,
 173                  * we will not get a response from the controller
 174                  */
 175                 pm8001_dbg(pm8001_ha, FAIL,
 176                            "Phy control failed due to fatal errors\n");
 177                 return -EFAULT;
 178         }
 179
 180         switch (func) {
 181         case PHY_FUNC_SET_LINK_RATE:
 182                 rates = funcdata;
 183                 if (rates->minimum_linkrate) {
 184                         pm8001_ha->phy[phy_id].minimum_linkrate =
 185                                 rates->minimum_linkrate;
 186                 }
 187                 if (rates->maximum_linkrate) {
 188                         pm8001_ha->phy[phy_id].maximum_linkrate =
 189                                 rates->maximum_linkrate;
 190                 }
 191                 if (pm8001_ha->phy[phy_id].phy_state ==  PHY_LINK_DISABLE) {
 192                         pm8001_ha->phy[phy_id].enable_completion = &completion;
 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_ha->phy[phy_id].enable_completion = &completion;
 202                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 203                         wait_for_completion(&completion);
 204                 }
 205                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 206                                               PHY_HARD_RESET);
 207                 break;
 208         case PHY_FUNC_LINK_RESET:
 209                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 210                         pm8001_ha->phy[phy_id].enable_completion = &completion;
 211                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 212                         wait_for_completion(&completion);
 213                 }
 214                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 215                                               PHY_LINK_RESET);
 216                 break;
 217         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 218                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 219                                               PHY_LINK_RESET);
 220                 break;
 221         case PHY_FUNC_DISABLE:
 222                 if (pm8001_ha->chip_id != chip_8001) {
 223                         if (pm8001_ha->phy[phy_id].phy_state ==
 224                                 PHY_STATE_LINK_UP_SPCV) {
 225                                 sas_phy_disconnected(&phy->sas_phy);
 226                                 sas_notify_phy_event(&phy->sas_phy,
 227                                         PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
 228                                 phy->phy_attached = 0;
 229                         }
 230                 } else {
 231                         if (pm8001_ha->phy[phy_id].phy_state ==
 232                                 PHY_STATE_LINK_UP_SPC) {
 233                                 sas_phy_disconnected(&phy->sas_phy);
 234                                 sas_notify_phy_event(&phy->sas_phy,
 235                                         PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
 236                                 phy->phy_attached = 0;
 237                         }
 238                 }
 239                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 240                 break;
 241         case PHY_FUNC_GET_EVENTS:
 242                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 243                 if (pm8001_ha->chip_id == chip_8001) {
 244                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 245                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 246                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 247                                 return -EINVAL;
 248                         }
 249                 }
 250                 {
 251                         struct sas_phy *phy = sas_phy->phy;
 252                         u32 __iomem *qp = pm8001_ha->io_mem[2].memvirtaddr
 253                                 + 0x1034 + (0x4000 * (phy_id & 3));
 254
 255                         phy->invalid_dword_count = readl(qp);
 256                         phy->running_disparity_error_count = readl(&qp[1]);
 257                         phy->loss_of_dword_sync_count = readl(&qp[3]);
 258                         phy->phy_reset_problem_count = readl(&qp[4]);
 259                 }
 260                 if (pm8001_ha->chip_id == chip_8001)
 261                         pm8001_bar4_shift(pm8001_ha, 0);
 262                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 263                 return 0;
 264         default:
 265                 pm8001_dbg(pm8001_ha, DEVIO, "func 0x%x\n", func);
 266                 rc = -EOPNOTSUPP;
 267         }
 268         msleep(300);
 269         return rc;
 270 }
 271
 272 /**
 273   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 274   * command to HBA.
 275   * @shost: the scsi host data.
 276   */
 277 void pm8001_scan_start(struct Scsi_Host *shost)
 278 {
 279         int i;
 280         struct pm8001_hba_info *pm8001_ha;
 281         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 282         DECLARE_COMPLETION_ONSTACK(completion);
 283         pm8001_ha = sha->lldd_ha;
 284         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 285         if (pm8001_ha->chip_id == chip_8001)
 286                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 287         for (i = 0; i < pm8001_ha->chip->n_phy; ++i) {
 288                 pm8001_ha->phy[i].enable_completion = &completion;
 289                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 290                 wait_for_completion(&completion);
 291                 msleep(300);
 292         }
 293 }
 294
 295 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 296 {
 297         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 298
 299         /* give the phy enabling interrupt event time to come in (1s
 300         * is empirically about all it takes) */
 301         if (time < HZ)
 302                 return 0;
 303         /* Wait for discovery to finish */
 304         sas_drain_work(ha);
 305         return 1;
 306 }
 307
 308 /**
 309   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 310   * @pm8001_ha: our hba card information
 311   * @ccb: the ccb which attached to smp task
 312   */
 313 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 314         struct pm8001_ccb_info *ccb)
 315 {
 316         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 317 }
 318
 319 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 320 {
 321         struct ata_queued_cmd *qc = task->uldd_task;
 322
 323         if (qc && ata_is_ncq(qc->tf.protocol)) {
 324                 *tag = qc->tag;
 325                 return 1;
 326         }
 327
 328         return 0;
 329 }
 330
 331 /**
 332   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 333   * @pm8001_ha: our hba card information
 334   * @ccb: the ccb which attached to sata task
 335   */
 336 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 337         struct pm8001_ccb_info *ccb)
 338 {
 339         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 340 }
 341
 342 /**
 343   * pm8001_task_prep_internal_abort - the dispatcher function, prepare data
 344   *                                   for internal abort task
 345   * @pm8001_ha: our hba card information
 346   * @ccb: the ccb which attached to sata task
 347   */
 348 static int pm8001_task_prep_internal_abort(struct pm8001_hba_info *pm8001_ha,
 349                                            struct pm8001_ccb_info *ccb)
 350 {
 351         return PM8001_CHIP_DISP->task_abort(pm8001_ha, ccb);
 352 }
 353
 354 /**
 355   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 356   * @pm8001_ha: our hba card information
 357   * @ccb: the ccb which attached to TM
 358   * @tmf: the task management IU
 359   */
 360 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 361         struct pm8001_ccb_info *ccb, struct sas_tmf_task *tmf)
 362 {
 363         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 364 }
 365
 366 /**
 367   * pm8001_task_prep_ssp - the dispatcher function, prepare ssp data for ssp task
 368   * @pm8001_ha: our hba card information
 369   * @ccb: the ccb which attached to ssp task
 370   */
 371 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 372         struct pm8001_ccb_info *ccb)
 373 {
 374         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 375 }
 376
 377  /* Find the local port id that's attached to this device */
 378 static int sas_find_local_port_id(struct domain_device *dev)
 379 {
 380         struct domain_device *pdev = dev->parent;
 381
 382         /* Directly attached device */
 383         if (!pdev)
 384                 return dev->port->id;
 385         while (pdev) {
 386                 struct domain_device *pdev_p = pdev->parent;
 387                 if (!pdev_p)
 388                         return pdev->port->id;
 389                 pdev = pdev->parent;
 390         }
 391         return 0;
 392 }
 393
 394 #define DEV_IS_GONE(pm8001_dev) \
 395         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 396
 397
 398 static int pm8001_deliver_command(struct pm8001_hba_info *pm8001_ha,
 399                                   struct pm8001_ccb_info *ccb)
 400 {
 401         struct sas_task *task = ccb->task;
 402         enum sas_protocol task_proto = task->task_proto;
 403         struct sas_tmf_task *tmf = task->tmf;
 404         int is_tmf = !!tmf;
 405
 406         switch (task_proto) {
 407         case SAS_PROTOCOL_SMP:
 408                 return pm8001_task_prep_smp(pm8001_ha, ccb);
 409         case SAS_PROTOCOL_SSP:
 410                 if (is_tmf)
 411                         return pm8001_task_prep_ssp_tm(pm8001_ha, ccb, tmf);
 412                 return pm8001_task_prep_ssp(pm8001_ha, ccb);
 413         case SAS_PROTOCOL_SATA:
 414         case SAS_PROTOCOL_STP:
 415                 return pm8001_task_prep_ata(pm8001_ha, ccb);
 416         case SAS_PROTOCOL_INTERNAL_ABORT:
 417                 return pm8001_task_prep_internal_abort(pm8001_ha, ccb);
 418         default:
 419                 dev_err(pm8001_ha->dev, "unknown sas_task proto: 0x%x\n",
 420                         task_proto);
 421         }
 422
 423         return -EINVAL;
 424 }
 425
 426 /**
 427   * pm8001_queue_command - register for upper layer used, all IO commands sent
 428   * to HBA are from this interface.
 429   * @task: the task to be execute.
 430   * @gfp_flags: gfp_flags
 431   */
 432 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 433 {
 434         struct task_status_struct *ts = &task->task_status;
 435         enum sas_protocol task_proto = task->task_proto;
 436         struct domain_device *dev = task->dev;
 437         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 438         bool internal_abort = sas_is_internal_abort(task);
 439         struct pm8001_hba_info *pm8001_ha;
 440         struct pm8001_port *port = NULL;
 441         struct pm8001_ccb_info *ccb;
 442         unsigned long flags;
 443         u32 n_elem = 0;
 444         int rc = 0;
 445
 446         if (!internal_abort && !dev->port) {
 447                 ts->resp = SAS_TASK_UNDELIVERED;
 448                 ts->stat = SAS_PHY_DOWN;
 449                 if (dev->dev_type != SAS_SATA_DEV)
 450                         task->task_done(task);
 451                 return 0;
 452         }
 453
 454         pm8001_ha = pm8001_find_ha_by_dev(dev);
 455         if (pm8001_ha->controller_fatal_error) {
 456                 ts->resp = SAS_TASK_UNDELIVERED;
 457                 task->task_done(task);
 458                 return 0;
 459         }
 460
 461         pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec device\n");
 462
 463         spin_lock_irqsave(&pm8001_ha->lock, flags);
 464
 465         pm8001_dev = dev->lldd_dev;
 466         port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 467
 468         if (!internal_abort &&
 469             (DEV_IS_GONE(pm8001_dev) || !port->port_attached)) {
 470                 ts->resp = SAS_TASK_UNDELIVERED;
 471                 ts->stat = SAS_PHY_DOWN;
 472                 if (sas_protocol_ata(task_proto)) {
 473                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 474                         task->task_done(task);
 475                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 476                 } else {
 477                         task->task_done(task);
 478                 }
 479                 rc = -ENODEV;
 480                 goto err_out;
 481         }
 482
 483         ccb = pm8001_ccb_alloc(pm8001_ha, pm8001_dev, task);
 484         if (!ccb) {
 485                 rc = -SAS_QUEUE_FULL;
 486                 goto err_out;
 487         }
 488
 489         if (!sas_protocol_ata(task_proto)) {
 490                 if (task->num_scatter) {
 491                         n_elem = dma_map_sg(pm8001_ha->dev, task->scatter,
 492                                             task->num_scatter, task->data_dir);
 493                         if (!n_elem) {
 494                                 rc = -ENOMEM;
 495                                 goto err_out_ccb;
 496                         }
 497                 }
 498         } else {
 499                 n_elem = task->num_scatter;
 500         }
 501
 502         task->lldd_task = ccb;
 503         ccb->n_elem = n_elem;
 504
 505         atomic_inc(&pm8001_dev->running_req);
 506
 507         rc = pm8001_deliver_command(pm8001_ha, ccb);
 508         if (rc) {
 509                 atomic_dec(&pm8001_dev->running_req);
 510                 if (!sas_protocol_ata(task_proto) && n_elem)
 511                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 512                                      task->num_scatter, task->data_dir);
 513 err_out_ccb:
 514                 pm8001_ccb_free(pm8001_ha, ccb);
 515
 516 err_out:
 517                 pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec failed[%d]!\n", rc);
 518         }
 519
 520         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 521
 522         return rc;
 523 }
 524
 525 /**
 526   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 527   * @pm8001_ha: our hba card information
 528   * @ccb: the ccb which attached to ssp task to free
 529   */
 530 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 531                           struct pm8001_ccb_info *ccb)
 532 {
 533         struct sas_task *task = ccb->task;
 534         struct ata_queued_cmd *qc;
 535         struct pm8001_device *pm8001_dev;
 536
 537         if (!task)
 538                 return;
 539
 540         if (!sas_protocol_ata(task->task_proto) && ccb->n_elem)
 541                 dma_unmap_sg(pm8001_ha->dev, task->scatter,
 542                              task->num_scatter, task->data_dir);
 543
 544         switch (task->task_proto) {
 545         case SAS_PROTOCOL_SMP:
 546                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 547                         DMA_FROM_DEVICE);
 548                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 549                         DMA_TO_DEVICE);
 550                 break;
 551
 552         case SAS_PROTOCOL_SATA:
 553         case SAS_PROTOCOL_STP:
 554         case SAS_PROTOCOL_SSP:
 555         default:
 556                 /* do nothing */
 557                 break;
 558         }
 559
 560         if (sas_protocol_ata(task->task_proto)) {
 561                 /* For SCSI/ATA commands uldd_task points to ata_queued_cmd */
 562                 qc = task->uldd_task;
 563                 pm8001_dev = ccb->device;
 564                 trace_pm80xx_request_complete(pm8001_ha->id,
 565                         pm8001_dev ? pm8001_dev->attached_phy : PM8001_MAX_PHYS,
 566                         ccb->ccb_tag, 0 /* ctlr_opcode not known */,
 567                         qc ? qc->tf.command : 0, // ata opcode
 568                         pm8001_dev ? atomic_read(&pm8001_dev->running_req) : -1);
 569         }
 570
 571         task->lldd_task = NULL;
 572         pm8001_ccb_free(pm8001_ha, ccb);
 573 }
 574
 575 /**
 576  * pm8001_alloc_dev - find a empty pm8001_device
 577  * @pm8001_ha: our hba card information
 578  */
 579 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 580 {
 581         u32 dev;
 582         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 583                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 584                         pm8001_ha->devices[dev].id = dev;
 585                         return &pm8001_ha->devices[dev];
 586                 }
 587         }
 588         if (dev == PM8001_MAX_DEVICES) {
 589                 pm8001_dbg(pm8001_ha, FAIL,
 590                            "max support %d devices, ignore ..\n",
 591                            PM8001_MAX_DEVICES);
 592         }
 593         return NULL;
 594 }
 595 /**
 596   * pm8001_find_dev - find a matching pm8001_device
 597   * @pm8001_ha: our hba card information
 598   * @device_id: device ID to match against
 599   */
 600 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 601                                         u32 device_id)
 602 {
 603         u32 dev;
 604         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 605                 if (pm8001_ha->devices[dev].device_id == device_id)
 606                         return &pm8001_ha->devices[dev];
 607         }
 608         if (dev == PM8001_MAX_DEVICES) {
 609                 pm8001_dbg(pm8001_ha, FAIL, "NO MATCHING DEVICE FOUND !!!\n");
 610         }
 611         return NULL;
 612 }
 613
 614 void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 615 {
 616         u32 id = pm8001_dev->id;
 617         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 618         pm8001_dev->id = id;
 619         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 620         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 621         pm8001_dev->sas_device = NULL;
 622 }
 623
 624 /**
 625   * pm8001_dev_found_notify - libsas notify a device is found.
 626   * @dev: the device structure which sas layer used.
 627   *
 628   * when libsas find a sas domain device, it should tell the LLDD that
 629   * device is found, and then LLDD register this device to HBA firmware
 630   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 631   * device ID(according to device's sas address) and returned it to LLDD. From
 632   * now on, we communicate with HBA FW with the device ID which HBA assigned
 633   * rather than sas address. it is the necessary step for our HBA but it is
 634   * the optional for other HBA driver.
 635   */
 636 static int pm8001_dev_found_notify(struct domain_device *dev)
 637 {
 638         unsigned long flags = 0;
 639         int res = 0;
 640         struct pm8001_hba_info *pm8001_ha = NULL;
 641         struct domain_device *parent_dev = dev->parent;
 642         struct pm8001_device *pm8001_device;
 643         DECLARE_COMPLETION_ONSTACK(completion);
 644         u32 flag = 0;
 645         pm8001_ha = pm8001_find_ha_by_dev(dev);
 646         spin_lock_irqsave(&pm8001_ha->lock, flags);
 647
 648         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 649         if (!pm8001_device) {
 650                 res = -1;
 651                 goto found_out;
 652         }
 653         pm8001_device->sas_device = dev;
 654         dev->lldd_dev = pm8001_device;
 655         pm8001_device->dev_type = dev->dev_type;
 656         pm8001_device->dcompletion = &completion;
 657         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 658                 int phy_id;
 659
 660                 phy_id = sas_find_attached_phy_id(&parent_dev->ex_dev, dev);
 661                 if (phy_id < 0) {
 662                         pm8001_dbg(pm8001_ha, FAIL,
 663                                    "Error: no attached dev:%016llx at ex:%016llx.\n",
 664                                    SAS_ADDR(dev->sas_addr),
 665                                    SAS_ADDR(parent_dev->sas_addr));
 666                         res = phy_id;
 667                 } else {
 668                         pm8001_device->attached_phy = phy_id;
 669                 }
 670         } else {
 671                 if (dev->dev_type == SAS_SATA_DEV) {
 672                         pm8001_device->attached_phy =
 673                                 dev->rphy->identify.phy_identifier;
 674                         flag = 1; /* directly sata */
 675                 }
 676         } /*register this device to HBA*/
 677         pm8001_dbg(pm8001_ha, DISC, "Found device\n");
 678         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 679         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 680         wait_for_completion(&completion);
 681         if (dev->dev_type == SAS_END_DEVICE)
 682                 msleep(50);
 683         pm8001_ha->flags = PM8001F_RUN_TIME;
 684         return 0;
 685 found_out:
 686         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 687         return res;
 688 }
 689
 690 int pm8001_dev_found(struct domain_device *dev)
 691 {
 692         return pm8001_dev_found_notify(dev);
 693 }
 694
 695 #define PM8001_TASK_TIMEOUT 20
 696
 697 /**
 698   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 699   * @dev: the device structure which sas layer used.
 700   */
 701 static void pm8001_dev_gone_notify(struct domain_device *dev)
 702 {
 703         unsigned long flags = 0;
 704         struct pm8001_hba_info *pm8001_ha;
 705         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 706
 707         pm8001_ha = pm8001_find_ha_by_dev(dev);
 708         spin_lock_irqsave(&pm8001_ha->lock, flags);
 709         if (pm8001_dev) {
 710                 u32 device_id = pm8001_dev->device_id;
 711
 712                 pm8001_dbg(pm8001_ha, DISC, "found dev[%d:%x] is gone.\n",
 713                            pm8001_dev->device_id, pm8001_dev->dev_type);
 714                 if (atomic_read(&pm8001_dev->running_req)) {
 715                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 716                         sas_execute_internal_abort_dev(dev, 0, NULL);
 717                         while (atomic_read(&pm8001_dev->running_req))
 718                                 msleep(20);
 719                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 720                 }
 721                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 722                 pm8001_free_dev(pm8001_dev);
 723         } else {
 724                 pm8001_dbg(pm8001_ha, DISC, "Found dev has gone.\n");
 725         }
 726         dev->lldd_dev = NULL;
 727         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 728 }
 729
 730 void pm8001_dev_gone(struct domain_device *dev)
 731 {
 732         pm8001_dev_gone_notify(dev);
 733 }
 734
 735 /* retry commands by ha, by task and/or by device */
 736 void pm8001_open_reject_retry(
 737         struct pm8001_hba_info *pm8001_ha,
 738         struct sas_task *task_to_close,
 739         struct pm8001_device *device_to_close)
 740 {
 741         int i;
 742         unsigned long flags;
 743
 744         if (pm8001_ha == NULL)
 745                 return;
 746
 747         spin_lock_irqsave(&pm8001_ha->lock, flags);
 748
 749         for (i = 0; i < PM8001_MAX_CCB; i++) {
 750                 struct sas_task *task;
 751                 struct task_status_struct *ts;
 752                 struct pm8001_device *pm8001_dev;
 753                 unsigned long flags1;
 754                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 755
 756                 if (ccb->ccb_tag == PM8001_INVALID_TAG)
 757                         continue;
 758
 759                 pm8001_dev = ccb->device;
 760                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 761                         continue;
 762                 if (!device_to_close) {
 763                         uintptr_t d = (uintptr_t)pm8001_dev
 764                                         - (uintptr_t)&pm8001_ha->devices;
 765                         if (((d % sizeof(*pm8001_dev)) != 0)
 766                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 767                                 continue;
 768                 } else if (pm8001_dev != device_to_close)
 769                         continue;
 770                 task = ccb->task;
 771                 if (!task || !task->task_done)
 772                         continue;
 773                 if (task_to_close && (task != task_to_close))
 774                         continue;
 775                 ts = &task->task_status;
 776                 ts->resp = SAS_TASK_COMPLETE;
 777                 /* Force the midlayer to retry */
 778                 ts->stat = SAS_OPEN_REJECT;
 779                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 780                 if (pm8001_dev)
 781                         atomic_dec(&pm8001_dev->running_req);
 782                 spin_lock_irqsave(&task->task_state_lock, flags1);
 783                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 784                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 785                 if (unlikely((task->task_state_flags
 786                                 & SAS_TASK_STATE_ABORTED))) {
 787                         spin_unlock_irqrestore(&task->task_state_lock,
 788                                 flags1);
 789                         pm8001_ccb_task_free(pm8001_ha, ccb);
 790                 } else {
 791                         spin_unlock_irqrestore(&task->task_state_lock,
 792                                 flags1);
 793                         pm8001_ccb_task_free(pm8001_ha, ccb);
 794                         mb();/* in order to force CPU ordering */
 795                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 796                         task->task_done(task);
 797                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 798                 }
 799         }
 800
 801         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 802 }
 803
 804 /**
 805  * pm8001_I_T_nexus_reset() - reset the initiator/target connection
 806  * @dev: the device structure for the device to reset.
 807  *
 808  * Standard mandates link reset for ATA (type 0) and hard reset for
 809  * SSP (type 1), only for RECOVERY
 810  */
 811 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 812 {
 813         int rc = TMF_RESP_FUNC_FAILED;
 814         struct pm8001_device *pm8001_dev;
 815         struct pm8001_hba_info *pm8001_ha;
 816         struct sas_phy *phy;
 817
 818         if (!dev || !dev->lldd_dev)
 819                 return -ENODEV;
 820
 821         pm8001_dev = dev->lldd_dev;
 822         pm8001_ha = pm8001_find_ha_by_dev(dev);
 823         phy = sas_get_local_phy(dev);
 824
 825         if (dev_is_sata(dev)) {
 826                 if (scsi_is_sas_phy_local(phy)) {
 827                         rc = 0;
 828                         goto out;
 829                 }
 830                 rc = sas_phy_reset(phy, 1);
 831                 if (rc) {
 832                         pm8001_dbg(pm8001_ha, EH,
 833                                    "phy reset failed for device %x\n"
 834                                    "with rc %d\n", pm8001_dev->device_id, rc);
 835                         rc = TMF_RESP_FUNC_FAILED;
 836                         goto out;
 837                 }
 838                 msleep(2000);
 839                 rc = sas_execute_internal_abort_dev(dev, 0, NULL);
 840                 if (rc) {
 841                         pm8001_dbg(pm8001_ha, EH, "task abort failed %x\n"
 842                                    "with rc %d\n", pm8001_dev->device_id, rc);
 843                         rc = TMF_RESP_FUNC_FAILED;
 844                 }
 845         } else {
 846                 rc = sas_phy_reset(phy, 1);
 847                 msleep(2000);
 848         }
 849         pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
 850                    pm8001_dev->device_id, rc);
 851  out:
 852         sas_put_local_phy(phy);
 853         return rc;
 854 }
 855
 856 /*
 857 * This function handle the IT_NEXUS_XXX event or completion
 858 * status code for SSP/SATA/SMP I/O request.
 859 */
 860 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
 861 {
 862         int rc = TMF_RESP_FUNC_FAILED;
 863         struct pm8001_device *pm8001_dev;
 864         struct pm8001_hba_info *pm8001_ha;
 865         struct sas_phy *phy;
 866
 867         if (!dev || !dev->lldd_dev)
 868                 return -1;
 869
 870         pm8001_dev = dev->lldd_dev;
 871         pm8001_ha = pm8001_find_ha_by_dev(dev);
 872
 873         pm8001_dbg(pm8001_ha, EH, "I_T_Nexus handler invoked !!\n");
 874
 875         phy = sas_get_local_phy(dev);
 876
 877         if (dev_is_sata(dev)) {
 878                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
 879                 if (scsi_is_sas_phy_local(phy)) {
 880                         rc = 0;
 881                         goto out;
 882                 }
 883                 /* send internal ssp/sata/smp abort command to FW */
 884                 sas_execute_internal_abort_dev(dev, 0, NULL);
 885                 msleep(100);
 886
 887                 /* deregister the target device */
 888                 pm8001_dev_gone_notify(dev);
 889                 msleep(200);
 890
 891                 /*send phy reset to hard reset target */
 892                 rc = sas_phy_reset(phy, 1);
 893                 msleep(2000);
 894                 pm8001_dev->setds_completion = &completion_setstate;
 895
 896                 wait_for_completion(&completion_setstate);
 897         } else {
 898                 /* send internal ssp/sata/smp abort command to FW */
 899                 sas_execute_internal_abort_dev(dev, 0, NULL);
 900                 msleep(100);
 901
 902                 /* deregister the target device */
 903                 pm8001_dev_gone_notify(dev);
 904                 msleep(200);
 905
 906                 /*send phy reset to hard reset target */
 907                 rc = sas_phy_reset(phy, 1);
 908                 msleep(2000);
 909         }
 910         pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
 911                    pm8001_dev->device_id, rc);
 912 out:
 913         sas_put_local_phy(phy);
 914
 915         return rc;
 916 }
 917 /* mandatory SAM-3, the task reset the specified LUN*/
 918 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
 919 {
 920         int rc = TMF_RESP_FUNC_FAILED;
 921         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 922         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 923         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 924
 925         if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
 926                 /*
 927                  * If the controller is in fatal error state,
 928                  * we will not get a response from the controller
 929                  */
 930                 pm8001_dbg(pm8001_ha, FAIL,
 931                            "LUN reset failed due to fatal errors\n");
 932                 return rc;
 933         }
 934
 935         if (dev_is_sata(dev)) {
 936                 struct sas_phy *phy = sas_get_local_phy(dev);
 937                 sas_execute_internal_abort_dev(dev, 0, NULL);
 938                 rc = sas_phy_reset(phy, 1);
 939                 sas_put_local_phy(phy);
 940                 pm8001_dev->setds_completion = &completion_setstate;
 941                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 942                         pm8001_dev, DS_OPERATIONAL);
 943                 wait_for_completion(&completion_setstate);
 944         } else {
 945                 rc = sas_lu_reset(dev, lun);
 946         }
 947         /* If failed, fall-through I_T_Nexus reset */
 948         pm8001_dbg(pm8001_ha, EH, "for device[%x]:rc=%d\n",
 949                    pm8001_dev->device_id, rc);
 950         return rc;
 951 }
 952
 953 /* optional SAM-3 */
 954 int pm8001_query_task(struct sas_task *task)
 955 {
 956         u32 tag = 0xdeadbeef;
 957         int rc = TMF_RESP_FUNC_FAILED;
 958         if (unlikely(!task || !task->lldd_task || !task->dev))
 959                 return rc;
 960
 961         if (task->task_proto & SAS_PROTOCOL_SSP) {
 962                 struct scsi_cmnd *cmnd = task->uldd_task;
 963                 struct domain_device *dev = task->dev;
 964                 struct pm8001_hba_info *pm8001_ha =
 965                         pm8001_find_ha_by_dev(dev);
 966
 967                 rc = pm8001_find_tag(task, &tag);
 968                 if (rc == 0) {
 969                         rc = TMF_RESP_FUNC_FAILED;
 970                         return rc;
 971                 }
 972                 pm8001_dbg(pm8001_ha, EH, "Query:[%16ph]\n", cmnd->cmnd);
 973
 974                 rc = sas_query_task(task, tag);
 975                 switch (rc) {
 976                 /* The task is still in Lun, release it then */
 977                 case TMF_RESP_FUNC_SUCC:
 978                         pm8001_dbg(pm8001_ha, EH,
 979                                    "The task is still in Lun\n");
 980                         break;
 981                 /* The task is not in Lun or failed, reset the phy */
 982                 case TMF_RESP_FUNC_FAILED:
 983                 case TMF_RESP_FUNC_COMPLETE:
 984                         pm8001_dbg(pm8001_ha, EH,
 985                                    "The task is not in Lun or failed, reset the phy\n");
 986                         break;
 987                 }
 988         }
 989         pr_err("pm80xx: rc= %d\n", rc);
 990         return rc;
 991 }
 992
 993 /*  mandatory SAM-3, still need free task/ccb info, abort the specified task */
 994 int pm8001_abort_task(struct sas_task *task)
 995 {
 996         struct pm8001_ccb_info *ccb = task->lldd_task;
 997         unsigned long flags;
 998         u32 tag;
 999         struct domain_device *dev ;
1000         struct pm8001_hba_info *pm8001_ha;
1001         struct pm8001_device *pm8001_dev;
1002         int rc = TMF_RESP_FUNC_FAILED, ret;
1003         u32 phy_id, port_id;
1004         struct sas_task_slow slow_task;
1005
1006         if (!task->lldd_task || !task->dev)
1007                 return TMF_RESP_FUNC_FAILED;
1008
1009         dev = task->dev;
1010         pm8001_dev = dev->lldd_dev;
1011         pm8001_ha = pm8001_find_ha_by_dev(dev);
1012         phy_id = pm8001_dev->attached_phy;
1013
1014         if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
1015                 // If the controller is seeing fatal errors
1016                 // abort task will not get a response from the controller
1017                 return TMF_RESP_FUNC_FAILED;
1018         }
1019
1020         ret = pm8001_find_tag(task, &tag);
1021         if (ret == 0) {
1022                 pm8001_info(pm8001_ha, "no tag for task:%p\n", task);
1023                 return TMF_RESP_FUNC_FAILED;
1024         }
1025         spin_lock_irqsave(&task->task_state_lock, flags);
1026         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1027                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1028                 return TMF_RESP_FUNC_COMPLETE;
1029         }
1030         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1031         if (task->slow_task == NULL) {
1032                 init_completion(&slow_task.completion);
1033                 task->slow_task = &slow_task;
1034         }
1035         spin_unlock_irqrestore(&task->task_state_lock, flags);
1036         if (task->task_proto & SAS_PROTOCOL_SSP) {
1037                 rc = sas_abort_task(task, tag);
1038                 sas_execute_internal_abort_single(dev, tag, 0, NULL);
1039         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1040                 task->task_proto & SAS_PROTOCOL_STP) {
1041                 if (pm8001_ha->chip_id == chip_8006) {
1042                         DECLARE_COMPLETION_ONSTACK(completion_reset);
1043                         DECLARE_COMPLETION_ONSTACK(completion);
1044                         struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1045                         port_id = phy->port->port_id;
1046
1047                         /* 1. Set Device state as Recovery */
1048                         pm8001_dev->setds_completion = &completion;
1049                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1050                                 pm8001_dev, DS_IN_RECOVERY);
1051                         wait_for_completion(&completion);
1052
1053                         /* 2. Send Phy Control Hard Reset */
1054                         reinit_completion(&completion);
1055                         phy->port_reset_status = PORT_RESET_TMO;
1056                         phy->reset_success = false;
1057                         phy->enable_completion = &completion;
1058                         phy->reset_completion = &completion_reset;
1059                         ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1060                                 PHY_HARD_RESET);
1061                         if (ret) {
1062                                 phy->enable_completion = NULL;
1063                                 phy->reset_completion = NULL;
1064                                 goto out;
1065                         }
1066
1067                         /* In the case of the reset timeout/fail we still
1068                          * abort the command at the firmware. The assumption
1069                          * here is that the drive is off doing something so
1070                          * that it's not processing requests, and we want to
1071                          * avoid getting a completion for this and either
1072                          * leaking the task in libsas or losing the race and
1073                          * getting a double free.
1074                          */
1075                         pm8001_dbg(pm8001_ha, MSG,
1076                                    "Waiting for local phy ctl\n");
1077                         ret = wait_for_completion_timeout(&completion,
1078                                         PM8001_TASK_TIMEOUT * HZ);
1079                         if (!ret || !phy->reset_success) {
1080                                 phy->enable_completion = NULL;
1081                                 phy->reset_completion = NULL;
1082                         } else {
1083                                 /* 3. Wait for Port Reset complete or
1084                                  * Port reset TMO
1085                                  */
1086                                 pm8001_dbg(pm8001_ha, MSG,
1087                                            "Waiting for Port reset\n");
1088                                 ret = wait_for_completion_timeout(
1089                                         &completion_reset,
1090                                         PM8001_TASK_TIMEOUT * HZ);
1091                                 if (!ret)
1092                                         phy->reset_completion = NULL;
1093                                 WARN_ON(phy->port_reset_status ==
1094                                                 PORT_RESET_TMO);
1095                                 if (phy->port_reset_status == PORT_RESET_TMO) {
1096                                         pm8001_dev_gone_notify(dev);
1097                                         PM8001_CHIP_DISP->hw_event_ack_req(
1098                                                 pm8001_ha, 0,
1099                                                 0x07, /*HW_EVENT_PHY_DOWN ack*/
1100                                                 port_id, phy_id, 0, 0);
1101                                         goto out;
1102                                 }
1103                         }
1104
1105                         /*
1106                          * 4. SATA Abort ALL
1107                          * we wait for the task to be aborted so that the task
1108                          * is removed from the ccb. on success the caller is
1109                          * going to free the task.
1110                          */
1111                         ret = sas_execute_internal_abort_dev(dev, 0, NULL);
1112                         if (ret)
1113                                 goto out;
1114                         ret = wait_for_completion_timeout(
1115                                 &task->slow_task->completion,
1116                                 PM8001_TASK_TIMEOUT * HZ);
1117                         if (!ret)
1118                                 goto out;
1119
1120                         /* 5. Set Device State as Operational */
1121                         reinit_completion(&completion);
1122                         pm8001_dev->setds_completion = &completion;
1123                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1124                                 pm8001_dev, DS_OPERATIONAL);
1125                         wait_for_completion(&completion);
1126                 } else {
1127                         /*
1128                          * Ensure that if we see a completion for the ccb
1129                          * associated with the task which we are trying to
1130                          * abort then we should not touch the sas_task as it
1131                          * may race with libsas freeing it when return here.
1132                          */
1133                         ccb->task = NULL;
1134                         ret = sas_execute_internal_abort_single(dev, tag, 0, NULL);
1135                 }
1136                 rc = TMF_RESP_FUNC_COMPLETE;
1137         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1138                 /* SMP */
1139                 rc = sas_execute_internal_abort_single(dev, tag, 0, NULL);
1140
1141         }
1142 out:
1143         spin_lock_irqsave(&task->task_state_lock, flags);
1144         if (task->slow_task == &slow_task)
1145                 task->slow_task = NULL;
1146         spin_unlock_irqrestore(&task->task_state_lock, flags);
1147         if (rc != TMF_RESP_FUNC_COMPLETE)
1148                 pm8001_info(pm8001_ha, "rc= %d\n", rc);
1149         return rc;
1150 }
1151
1152 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1153 {
1154         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1155         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1156
1157         pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",
1158                    pm8001_dev->device_id);
1159         return sas_clear_task_set(dev, lun);
1160 }
1161
1162 void pm8001_port_formed(struct asd_sas_phy *sas_phy)
1163 {
1164         struct sas_ha_struct *sas_ha = sas_phy->ha;
1165         struct pm8001_hba_info *pm8001_ha = sas_ha->lldd_ha;
1166         struct pm8001_phy *phy = sas_phy->lldd_phy;
1167         struct asd_sas_port *sas_port = sas_phy->port;
1168         struct pm8001_port *port = phy->port;
1169
1170         if (!sas_port) {
1171                 pm8001_dbg(pm8001_ha, FAIL, "Received null port\n");
1172                 return;
1173         }
1174         sas_port->lldd_port = port;
1175 }
1176
1177 void pm8001_setds_completion(struct domain_device *dev)
1178 {
1179         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1180         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1181         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1182
1183         if (pm8001_ha->chip_id != chip_8001) {
1184                 pm8001_dev->setds_completion = &completion_setstate;
1185                 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1186                         pm8001_dev, DS_OPERATIONAL);
1187                 wait_for_completion(&completion_setstate);
1188         }
1189 }
1190
1191 void pm8001_tmf_aborted(struct sas_task *task)
1192 {
1193         struct pm8001_ccb_info *ccb = task->lldd_task;
1194
1195         if (ccb)
1196                 ccb->task = NULL;
1197 }