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