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
  44 /**
  45  * pm8001_find_tag - from sas task to find out  tag that belongs to this task
  46  * @task: the task sent to the LLDD
  47  * @tag: the found tag associated with the task
  48  */
  49 static int pm8001_find_tag(struct sas_task *task, u32 *tag)
  50 {
  51         if (task->lldd_task) {
  52                 struct pm8001_ccb_info *ccb;
  53                 ccb = task->lldd_task;
  54                 *tag = ccb->ccb_tag;
  55                 return 1;
  56         }
  57         return 0;
  58 }
  59
  60 /**
  61   * pm8001_tag_free - free the no more needed tag
  62   * @pm8001_ha: our hba struct
  63   * @tag: the found tag associated with the task
  64   */
  65 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
  66 {
  67         void *bitmap = pm8001_ha->tags;
  68         clear_bit(tag, bitmap);
  69 }
  70
  71 /**
  72   * pm8001_tag_alloc - allocate a empty tag for task used.
  73   * @pm8001_ha: our hba struct
  74   * @tag_out: the found empty tag .
  75   */
  76 inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
  77 {
  78         unsigned int tag;
  79         void *bitmap = pm8001_ha->tags;
  80         unsigned long flags;
  81
  82         spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
  83         tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
  84         if (tag >= pm8001_ha->tags_num) {
  85                 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  86                 return -SAS_QUEUE_FULL;
  87         }
  88         set_bit(tag, bitmap);
  89         spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  90         *tag_out = tag;
  91         return 0;
  92 }
  93
  94 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
  95 {
  96         int i;
  97         for (i = 0; i < pm8001_ha->tags_num; ++i)
  98                 pm8001_tag_free(pm8001_ha, i);
  99 }
 100
 101  /**
 102   * pm8001_mem_alloc - allocate memory for pm8001.
 103   * @pdev: pci device.
 104   * @virt_addr: the allocated virtual address
 105   * @pphys_addr_hi: the physical address high byte address.
 106   * @pphys_addr_lo: the physical address low byte address.
 107   * @mem_size: memory size.
 108   */
 109 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
 110         dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
 111         u32 *pphys_addr_lo, u32 mem_size, u32 align)
 112 {
 113         caddr_t mem_virt_alloc;
 114         dma_addr_t mem_dma_handle;
 115         u64 phys_align;
 116         u64 align_offset = 0;
 117         if (align)
 118                 align_offset = (dma_addr_t)align - 1;
 119         mem_virt_alloc = dma_alloc_coherent(&pdev->dev, mem_size + align,
 120                                             &mem_dma_handle, GFP_KERNEL);
 121         if (!mem_virt_alloc) {
 122                 pr_err("pm80xx: memory allocation error\n");
 123                 return -1;
 124         }
 125         *pphys_addr = mem_dma_handle;
 126         phys_align = (*pphys_addr + align_offset) & ~align_offset;
 127         *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
 128         *pphys_addr_hi = upper_32_bits(phys_align);
 129         *pphys_addr_lo = lower_32_bits(phys_align);
 130         return 0;
 131 }
 132
 133 /**
 134   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 135   * find out our hba struct.
 136   * @dev: the domain device which from sas layer.
 137   */
 138 static
 139 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 140 {
 141         struct sas_ha_struct *sha = dev->port->ha;
 142         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 143         return pm8001_ha;
 144 }
 145
 146 /**
 147   * pm8001_phy_control - this function should be registered to
 148   * sas_domain_function_template to provide libsas used, note: this is just
 149   * control the HBA phy rather than other expander phy if you want control
 150   * other phy, you should use SMP command.
 151   * @sas_phy: which phy in HBA phys.
 152   * @func: the operation.
 153   * @funcdata: always NULL.
 154   */
 155 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 156         void *funcdata)
 157 {
 158         int rc = 0, phy_id = sas_phy->id;
 159         struct pm8001_hba_info *pm8001_ha = NULL;
 160         struct sas_phy_linkrates *rates;
 161         struct pm8001_phy *phy;
 162         DECLARE_COMPLETION_ONSTACK(completion);
 163         unsigned long flags;
 164         pm8001_ha = sas_phy->ha->lldd_ha;
 165         phy = &pm8001_ha->phy[phy_id];
 166         pm8001_ha->phy[phy_id].enable_completion = &completion;
 167         switch (func) {
 168         case PHY_FUNC_SET_LINK_RATE:
 169                 rates = funcdata;
 170                 if (rates->minimum_linkrate) {
 171                         pm8001_ha->phy[phy_id].minimum_linkrate =
 172                                 rates->minimum_linkrate;
 173                 }
 174                 if (rates->maximum_linkrate) {
 175                         pm8001_ha->phy[phy_id].maximum_linkrate =
 176                                 rates->maximum_linkrate;
 177                 }
 178                 if (pm8001_ha->phy[phy_id].phy_state ==  PHY_LINK_DISABLE) {
 179                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 180                         wait_for_completion(&completion);
 181                 }
 182                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 183                                               PHY_LINK_RESET);
 184                 break;
 185         case PHY_FUNC_HARD_RESET:
 186                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 187                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 188                         wait_for_completion(&completion);
 189                 }
 190                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 191                                               PHY_HARD_RESET);
 192                 break;
 193         case PHY_FUNC_LINK_RESET:
 194                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 195                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 196                         wait_for_completion(&completion);
 197                 }
 198                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 199                                               PHY_LINK_RESET);
 200                 break;
 201         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 202                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 203                                               PHY_LINK_RESET);
 204                 break;
 205         case PHY_FUNC_DISABLE:
 206                 if (pm8001_ha->chip_id != chip_8001) {
 207                         if (pm8001_ha->phy[phy_id].phy_state ==
 208                                 PHY_STATE_LINK_UP_SPCV) {
 209                                 sas_phy_disconnected(&phy->sas_phy);
 210                                 sas_notify_phy_event(&phy->sas_phy,
 211                                         PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
 212                                 phy->phy_attached = 0;
 213                         }
 214                 } else {
 215                         if (pm8001_ha->phy[phy_id].phy_state ==
 216                                 PHY_STATE_LINK_UP_SPC) {
 217                                 sas_phy_disconnected(&phy->sas_phy);
 218                                 sas_notify_phy_event(&phy->sas_phy,
 219                                         PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
 220                                 phy->phy_attached = 0;
 221                         }
 222                 }
 223                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 224                 break;
 225         case PHY_FUNC_GET_EVENTS:
 226                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 227                 if (pm8001_ha->chip_id == chip_8001) {
 228                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 229                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 230                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 231                                 return -EINVAL;
 232                         }
 233                 }
 234                 {
 235                         struct sas_phy *phy = sas_phy->phy;
 236                         uint32_t *qp = (uint32_t *)(((char *)
 237                                 pm8001_ha->io_mem[2].memvirtaddr)
 238                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 239
 240                         phy->invalid_dword_count = qp[0];
 241                         phy->running_disparity_error_count = qp[1];
 242                         phy->loss_of_dword_sync_count = qp[3];
 243                         phy->phy_reset_problem_count = qp[4];
 244                 }
 245                 if (pm8001_ha->chip_id == chip_8001)
 246                         pm8001_bar4_shift(pm8001_ha, 0);
 247                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 248                 return 0;
 249         default:
 250                 pm8001_dbg(pm8001_ha, DEVIO, "func 0x%x\n", func);
 251                 rc = -EOPNOTSUPP;
 252         }
 253         msleep(300);
 254         return rc;
 255 }
 256
 257 /**
 258   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 259   * command to HBA.
 260   * @shost: the scsi host data.
 261   */
 262 void pm8001_scan_start(struct Scsi_Host *shost)
 263 {
 264         int i;
 265         struct pm8001_hba_info *pm8001_ha;
 266         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 267         DECLARE_COMPLETION_ONSTACK(completion);
 268         pm8001_ha = sha->lldd_ha;
 269         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 270         if (pm8001_ha->chip_id == chip_8001)
 271                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 272         for (i = 0; i < pm8001_ha->chip->n_phy; ++i) {
 273                 pm8001_ha->phy[i].enable_completion = &completion;
 274                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 275                 wait_for_completion(&completion);
 276                 msleep(300);
 277         }
 278 }
 279
 280 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 281 {
 282         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 283
 284         /* give the phy enabling interrupt event time to come in (1s
 285         * is empirically about all it takes) */
 286         if (time < HZ)
 287                 return 0;
 288         /* Wait for discovery to finish */
 289         sas_drain_work(ha);
 290         return 1;
 291 }
 292
 293 /**
 294   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 295   * @pm8001_ha: our hba card information
 296   * @ccb: the ccb which attached to smp task
 297   */
 298 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 299         struct pm8001_ccb_info *ccb)
 300 {
 301         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 302 }
 303
 304 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 305 {
 306         struct ata_queued_cmd *qc = task->uldd_task;
 307         if (qc) {
 308                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 309                     qc->tf.command == ATA_CMD_FPDMA_READ ||
 310                     qc->tf.command == ATA_CMD_FPDMA_RECV ||
 311                     qc->tf.command == ATA_CMD_FPDMA_SEND ||
 312                     qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
 313                         *tag = qc->tag;
 314                         return 1;
 315                 }
 316         }
 317         return 0;
 318 }
 319
 320 /**
 321   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 322   * @pm8001_ha: our hba card information
 323   * @ccb: the ccb which attached to sata task
 324   */
 325 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 326         struct pm8001_ccb_info *ccb)
 327 {
 328         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 329 }
 330
 331 /**
 332   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 333   * @pm8001_ha: our hba card information
 334   * @ccb: the ccb which attached to TM
 335   * @tmf: the task management IU
 336   */
 337 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 338         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 339 {
 340         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 341 }
 342
 343 /**
 344   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 345   * @pm8001_ha: our hba card information
 346   * @ccb: the ccb which attached to ssp task
 347   */
 348 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 349         struct pm8001_ccb_info *ccb)
 350 {
 351         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 352 }
 353
 354  /* Find the local port id that's attached to this device */
 355 static int sas_find_local_port_id(struct domain_device *dev)
 356 {
 357         struct domain_device *pdev = dev->parent;
 358
 359         /* Directly attached device */
 360         if (!pdev)
 361                 return dev->port->id;
 362         while (pdev) {
 363                 struct domain_device *pdev_p = pdev->parent;
 364                 if (!pdev_p)
 365                         return pdev->port->id;
 366                 pdev = pdev->parent;
 367         }
 368         return 0;
 369 }
 370
 371 #define DEV_IS_GONE(pm8001_dev) \
 372         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 373 /**
 374   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 375   * @task: the task to be execute.
 376   * @gfp_flags: gfp_flags.
 377   * @is_tmf: if it is task management task.
 378   * @tmf: the task management IU
 379   */
 380 static int pm8001_task_exec(struct sas_task *task,
 381         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 382 {
 383         struct domain_device *dev = task->dev;
 384         struct pm8001_hba_info *pm8001_ha;
 385         struct pm8001_device *pm8001_dev;
 386         struct pm8001_port *port = NULL;
 387         struct sas_task *t = task;
 388         struct pm8001_ccb_info *ccb;
 389         u32 tag = 0xdeadbeef, rc = 0, n_elem = 0;
 390         unsigned long flags = 0;
 391         enum sas_protocol task_proto = t->task_proto;
 392
 393         if (!dev->port) {
 394                 struct task_status_struct *tsm = &t->task_status;
 395                 tsm->resp = SAS_TASK_UNDELIVERED;
 396                 tsm->stat = SAS_PHY_DOWN;
 397                 if (dev->dev_type != SAS_SATA_DEV)
 398                         t->task_done(t);
 399                 return 0;
 400         }
 401         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 402         if (pm8001_ha->controller_fatal_error) {
 403                 struct task_status_struct *ts = &t->task_status;
 404
 405                 ts->resp = SAS_TASK_UNDELIVERED;
 406                 t->task_done(t);
 407                 return 0;
 408         }
 409         pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec device\n");
 410         spin_lock_irqsave(&pm8001_ha->lock, flags);
 411         do {
 412                 dev = t->dev;
 413                 pm8001_dev = dev->lldd_dev;
 414                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 415                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 416                         if (sas_protocol_ata(task_proto)) {
 417                                 struct task_status_struct *ts = &t->task_status;
 418                                 ts->resp = SAS_TASK_UNDELIVERED;
 419                                 ts->stat = SAS_PHY_DOWN;
 420
 421                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 422                                 t->task_done(t);
 423                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 424                                 continue;
 425                         } else {
 426                                 struct task_status_struct *ts = &t->task_status;
 427                                 ts->resp = SAS_TASK_UNDELIVERED;
 428                                 ts->stat = SAS_PHY_DOWN;
 429                                 t->task_done(t);
 430                                 continue;
 431                         }
 432                 }
 433                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 434                 if (rc)
 435                         goto err_out;
 436                 ccb = &pm8001_ha->ccb_info[tag];
 437
 438                 if (!sas_protocol_ata(task_proto)) {
 439                         if (t->num_scatter) {
 440                                 n_elem = dma_map_sg(pm8001_ha->dev,
 441                                         t->scatter,
 442                                         t->num_scatter,
 443                                         t->data_dir);
 444                                 if (!n_elem) {
 445                                         rc = -ENOMEM;
 446                                         goto err_out_tag;
 447                                 }
 448                         }
 449                 } else {
 450                         n_elem = t->num_scatter;
 451                 }
 452
 453                 t->lldd_task = ccb;
 454                 ccb->n_elem = n_elem;
 455                 ccb->ccb_tag = tag;
 456                 ccb->task = t;
 457                 ccb->device = pm8001_dev;
 458                 switch (task_proto) {
 459                 case SAS_PROTOCOL_SMP:
 460                         atomic_inc(&pm8001_dev->running_req);
 461                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 462                         break;
 463                 case SAS_PROTOCOL_SSP:
 464                         atomic_inc(&pm8001_dev->running_req);
 465                         if (is_tmf)
 466                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 467                                         ccb, tmf);
 468                         else
 469                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 470                         break;
 471                 case SAS_PROTOCOL_SATA:
 472                 case SAS_PROTOCOL_STP:
 473                         atomic_inc(&pm8001_dev->running_req);
 474                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 475                         break;
 476                 default:
 477                         dev_printk(KERN_ERR, pm8001_ha->dev,
 478                                 "unknown sas_task proto: 0x%x\n", task_proto);
 479                         rc = -EINVAL;
 480                         break;
 481                 }
 482
 483                 if (rc) {
 484                         pm8001_dbg(pm8001_ha, IO, "rc is %x\n", rc);
 485                         atomic_dec(&pm8001_dev->running_req);
 486                         goto err_out_tag;
 487                 }
 488                 /* TODO: select normal or high priority */
 489                 spin_lock(&t->task_state_lock);
 490                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 491                 spin_unlock(&t->task_state_lock);
 492         } while (0);
 493         rc = 0;
 494         goto out_done;
 495
 496 err_out_tag:
 497         pm8001_tag_free(pm8001_ha, tag);
 498 err_out:
 499         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 500         if (!sas_protocol_ata(task_proto))
 501                 if (n_elem)
 502                         dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
 503                                 t->data_dir);
 504 out_done:
 505         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 506         return rc;
 507 }
 508
 509 /**
 510   * pm8001_queue_command - register for upper layer used, all IO commands sent
 511   * to HBA are from this interface.
 512   * @task: the task to be execute.
 513   * @gfp_flags: gfp_flags
 514   */
 515 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 516 {
 517         return pm8001_task_exec(task, gfp_flags, 0, NULL);
 518 }
 519
 520 /**
 521   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 522   * @pm8001_ha: our hba card information
 523   * @ccb: the ccb which attached to ssp task
 524   * @task: the task to be free.
 525   * @ccb_idx: ccb index.
 526   */
 527 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 528         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 529 {
 530         if (!ccb->task)
 531                 return;
 532         if (!sas_protocol_ata(task->task_proto))
 533                 if (ccb->n_elem)
 534                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 535                                 task->num_scatter, task->data_dir);
 536
 537         switch (task->task_proto) {
 538         case SAS_PROTOCOL_SMP:
 539                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 540                         DMA_FROM_DEVICE);
 541                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 542                         DMA_TO_DEVICE);
 543                 break;
 544
 545         case SAS_PROTOCOL_SATA:
 546         case SAS_PROTOCOL_STP:
 547         case SAS_PROTOCOL_SSP:
 548         default:
 549                 /* do nothing */
 550                 break;
 551         }
 552         task->lldd_task = NULL;
 553         ccb->task = NULL;
 554         ccb->ccb_tag = 0xFFFFFFFF;
 555         ccb->open_retry = 0;
 556         pm8001_tag_free(pm8001_ha, ccb_idx);
 557 }
 558
 559  /**
 560   * pm8001_alloc_dev - find a empty pm8001_device
 561   * @pm8001_ha: our hba card information
 562   */
 563 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 564 {
 565         u32 dev;
 566         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 567                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 568                         pm8001_ha->devices[dev].id = dev;
 569                         return &pm8001_ha->devices[dev];
 570                 }
 571         }
 572         if (dev == PM8001_MAX_DEVICES) {
 573                 pm8001_dbg(pm8001_ha, FAIL,
 574                            "max support %d devices, ignore ..\n",
 575                            PM8001_MAX_DEVICES);
 576         }
 577         return NULL;
 578 }
 579 /**
 580   * pm8001_find_dev - find a matching pm8001_device
 581   * @pm8001_ha: our hba card information
 582   * @device_id: device ID to match against
 583   */
 584 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 585                                         u32 device_id)
 586 {
 587         u32 dev;
 588         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 589                 if (pm8001_ha->devices[dev].device_id == device_id)
 590                         return &pm8001_ha->devices[dev];
 591         }
 592         if (dev == PM8001_MAX_DEVICES) {
 593                 pm8001_dbg(pm8001_ha, FAIL, "NO MATCHING DEVICE FOUND !!!\n");
 594         }
 595         return NULL;
 596 }
 597
 598 void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 599 {
 600         u32 id = pm8001_dev->id;
 601         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 602         pm8001_dev->id = id;
 603         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 604         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 605         pm8001_dev->sas_device = NULL;
 606 }
 607
 608 /**
 609   * pm8001_dev_found_notify - libsas notify a device is found.
 610   * @dev: the device structure which sas layer used.
 611   *
 612   * when libsas find a sas domain device, it should tell the LLDD that
 613   * device is found, and then LLDD register this device to HBA firmware
 614   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 615   * device ID(according to device's sas address) and returned it to LLDD. From
 616   * now on, we communicate with HBA FW with the device ID which HBA assigned
 617   * rather than sas address. it is the necessary step for our HBA but it is
 618   * the optional for other HBA driver.
 619   */
 620 static int pm8001_dev_found_notify(struct domain_device *dev)
 621 {
 622         unsigned long flags = 0;
 623         int res = 0;
 624         struct pm8001_hba_info *pm8001_ha = NULL;
 625         struct domain_device *parent_dev = dev->parent;
 626         struct pm8001_device *pm8001_device;
 627         DECLARE_COMPLETION_ONSTACK(completion);
 628         u32 flag = 0;
 629         pm8001_ha = pm8001_find_ha_by_dev(dev);
 630         spin_lock_irqsave(&pm8001_ha->lock, flags);
 631
 632         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 633         if (!pm8001_device) {
 634                 res = -1;
 635                 goto found_out;
 636         }
 637         pm8001_device->sas_device = dev;
 638         dev->lldd_dev = pm8001_device;
 639         pm8001_device->dev_type = dev->dev_type;
 640         pm8001_device->dcompletion = &completion;
 641         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 642                 int phy_id;
 643                 struct ex_phy *phy;
 644                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 645                 phy_id++) {
 646                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 647                         if (SAS_ADDR(phy->attached_sas_addr)
 648                                 == SAS_ADDR(dev->sas_addr)) {
 649                                 pm8001_device->attached_phy = phy_id;
 650                                 break;
 651                         }
 652                 }
 653                 if (phy_id == parent_dev->ex_dev.num_phys) {
 654                         pm8001_dbg(pm8001_ha, FAIL,
 655                                    "Error: no attached dev:%016llx at ex:%016llx.\n",
 656                                    SAS_ADDR(dev->sas_addr),
 657                                    SAS_ADDR(parent_dev->sas_addr));
 658                         res = -1;
 659                 }
 660         } else {
 661                 if (dev->dev_type == SAS_SATA_DEV) {
 662                         pm8001_device->attached_phy =
 663                                 dev->rphy->identify.phy_identifier;
 664                         flag = 1; /* directly sata */
 665                 }
 666         } /*register this device to HBA*/
 667         pm8001_dbg(pm8001_ha, DISC, "Found device\n");
 668         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 669         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 670         wait_for_completion(&completion);
 671         if (dev->dev_type == SAS_END_DEVICE)
 672                 msleep(50);
 673         pm8001_ha->flags = PM8001F_RUN_TIME;
 674         return 0;
 675 found_out:
 676         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 677         return res;
 678 }
 679
 680 int pm8001_dev_found(struct domain_device *dev)
 681 {
 682         return pm8001_dev_found_notify(dev);
 683 }
 684
 685 void pm8001_task_done(struct sas_task *task)
 686 {
 687         if (!del_timer(&task->slow_task->timer))
 688                 return;
 689         complete(&task->slow_task->completion);
 690 }
 691
 692 static void pm8001_tmf_timedout(struct timer_list *t)
 693 {
 694         struct sas_task_slow *slow = from_timer(slow, t, timer);
 695         struct sas_task *task = slow->task;
 696
 697         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 698         complete(&task->slow_task->completion);
 699 }
 700
 701 #define PM8001_TASK_TIMEOUT 20
 702 /**
 703   * pm8001_exec_internal_tmf_task - execute some task management commands.
 704   * @dev: the wanted device.
 705   * @tmf: which task management wanted to be take.
 706   * @para_len: para_len.
 707   * @parameter: ssp task parameter.
 708   *
 709   * when errors or exception happened, we may want to do something, for example
 710   * abort the issued task which result in this execption, it is done by calling
 711   * this function, note it is also with the task execute interface.
 712   */
 713 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 714         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 715 {
 716         int res, retry;
 717         struct sas_task *task = NULL;
 718         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 719         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 720         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 721
 722         for (retry = 0; retry < 3; retry++) {
 723                 task = sas_alloc_slow_task(GFP_KERNEL);
 724                 if (!task)
 725                         return -ENOMEM;
 726
 727                 task->dev = dev;
 728                 task->task_proto = dev->tproto;
 729                 memcpy(&task->ssp_task, parameter, para_len);
 730                 task->task_done = pm8001_task_done;
 731                 task->slow_task->timer.function = pm8001_tmf_timedout;
 732                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 733                 add_timer(&task->slow_task->timer);
 734
 735                 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 736
 737                 if (res) {
 738                         del_timer(&task->slow_task->timer);
 739                         pm8001_dbg(pm8001_ha, FAIL, "Executing internal task failed\n");
 740                         goto ex_err;
 741                 }
 742                 wait_for_completion(&task->slow_task->completion);
 743                 if (pm8001_ha->chip_id != chip_8001) {
 744                         pm8001_dev->setds_completion = &completion_setstate;
 745                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 746                                 pm8001_dev, DS_OPERATIONAL);
 747                         wait_for_completion(&completion_setstate);
 748                 }
 749                 res = -TMF_RESP_FUNC_FAILED;
 750                 /* Even TMF timed out, return direct. */
 751                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 752                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 753                                 pm8001_dbg(pm8001_ha, FAIL,
 754                                            "TMF task[%x]timeout.\n",
 755                                            tmf->tmf);
 756                                 goto ex_err;
 757                         }
 758                 }
 759
 760                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 761                         task->task_status.stat == SAM_STAT_GOOD) {
 762                         res = TMF_RESP_FUNC_COMPLETE;
 763                         break;
 764                 }
 765
 766                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 767                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 768                         /* no error, but return the number of bytes of
 769                         * underrun */
 770                         res = task->task_status.residual;
 771                         break;
 772                 }
 773
 774                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 775                         task->task_status.stat == SAS_DATA_OVERRUN) {
 776                         pm8001_dbg(pm8001_ha, FAIL, "Blocked task error.\n");
 777                         res = -EMSGSIZE;
 778                         break;
 779                 } else {
 780                         pm8001_dbg(pm8001_ha, EH,
 781                                    " Task to dev %016llx response:0x%x status 0x%x\n",
 782                                    SAS_ADDR(dev->sas_addr),
 783                                    task->task_status.resp,
 784                                    task->task_status.stat);
 785                         sas_free_task(task);
 786                         task = NULL;
 787                 }
 788         }
 789 ex_err:
 790         BUG_ON(retry == 3 && task != NULL);
 791         sas_free_task(task);
 792         return res;
 793 }
 794
 795 static int
 796 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 797         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 798         u32 task_tag)
 799 {
 800         int res, retry;
 801         u32 ccb_tag;
 802         struct pm8001_ccb_info *ccb;
 803         struct sas_task *task = NULL;
 804
 805         for (retry = 0; retry < 3; retry++) {
 806                 task = sas_alloc_slow_task(GFP_KERNEL);
 807                 if (!task)
 808                         return -ENOMEM;
 809
 810                 task->dev = dev;
 811                 task->task_proto = dev->tproto;
 812                 task->task_done = pm8001_task_done;
 813                 task->slow_task->timer.function = pm8001_tmf_timedout;
 814                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 815                 add_timer(&task->slow_task->timer);
 816
 817                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 818                 if (res)
 819                         goto ex_err;
 820                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 821                 ccb->device = pm8001_dev;
 822                 ccb->ccb_tag = ccb_tag;
 823                 ccb->task = task;
 824                 ccb->n_elem = 0;
 825
 826                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 827                         pm8001_dev, flag, task_tag, ccb_tag);
 828
 829                 if (res) {
 830                         del_timer(&task->slow_task->timer);
 831                         pm8001_dbg(pm8001_ha, FAIL, "Executing internal task failed\n");
 832                         goto ex_err;
 833                 }
 834                 wait_for_completion(&task->slow_task->completion);
 835                 res = TMF_RESP_FUNC_FAILED;
 836                 /* Even TMF timed out, return direct. */
 837                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 838                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 839                                 pm8001_dbg(pm8001_ha, FAIL,
 840                                            "TMF task timeout.\n");
 841                                 goto ex_err;
 842                         }
 843                 }
 844
 845                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 846                         task->task_status.stat == SAM_STAT_GOOD) {
 847                         res = TMF_RESP_FUNC_COMPLETE;
 848                         break;
 849
 850                 } else {
 851                         pm8001_dbg(pm8001_ha, EH,
 852                                    " Task to dev %016llx response: 0x%x status 0x%x\n",
 853                                    SAS_ADDR(dev->sas_addr),
 854                                    task->task_status.resp,
 855                                    task->task_status.stat);
 856                         sas_free_task(task);
 857                         task = NULL;
 858                 }
 859         }
 860 ex_err:
 861         BUG_ON(retry == 3 && task != NULL);
 862         sas_free_task(task);
 863         return res;
 864 }
 865
 866 /**
 867   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 868   * @dev: the device structure which sas layer used.
 869   */
 870 static void pm8001_dev_gone_notify(struct domain_device *dev)
 871 {
 872         unsigned long flags = 0;
 873         struct pm8001_hba_info *pm8001_ha;
 874         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 875
 876         pm8001_ha = pm8001_find_ha_by_dev(dev);
 877         spin_lock_irqsave(&pm8001_ha->lock, flags);
 878         if (pm8001_dev) {
 879                 u32 device_id = pm8001_dev->device_id;
 880
 881                 pm8001_dbg(pm8001_ha, DISC, "found dev[%d:%x] is gone.\n",
 882                            pm8001_dev->device_id, pm8001_dev->dev_type);
 883                 if (atomic_read(&pm8001_dev->running_req)) {
 884                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 885                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
 886                                                         dev, 1, 0);
 887                         while (atomic_read(&pm8001_dev->running_req))
 888                                 msleep(20);
 889                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 890                 }
 891                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 892                 pm8001_free_dev(pm8001_dev);
 893         } else {
 894                 pm8001_dbg(pm8001_ha, DISC, "Found dev has gone.\n");
 895         }
 896         dev->lldd_dev = NULL;
 897         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 898 }
 899
 900 void pm8001_dev_gone(struct domain_device *dev)
 901 {
 902         pm8001_dev_gone_notify(dev);
 903 }
 904
 905 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 906         u8 *lun, struct pm8001_tmf_task *tmf)
 907 {
 908         struct sas_ssp_task ssp_task;
 909         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 910                 return TMF_RESP_FUNC_ESUPP;
 911
 912         memcpy((u8 *)&ssp_task.LUN, lun, 8);
 913         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 914                 tmf);
 915 }
 916
 917 /* retry commands by ha, by task and/or by device */
 918 void pm8001_open_reject_retry(
 919         struct pm8001_hba_info *pm8001_ha,
 920         struct sas_task *task_to_close,
 921         struct pm8001_device *device_to_close)
 922 {
 923         int i;
 924         unsigned long flags;
 925
 926         if (pm8001_ha == NULL)
 927                 return;
 928
 929         spin_lock_irqsave(&pm8001_ha->lock, flags);
 930
 931         for (i = 0; i < PM8001_MAX_CCB; i++) {
 932                 struct sas_task *task;
 933                 struct task_status_struct *ts;
 934                 struct pm8001_device *pm8001_dev;
 935                 unsigned long flags1;
 936                 u32 tag;
 937                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 938
 939                 pm8001_dev = ccb->device;
 940                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 941                         continue;
 942                 if (!device_to_close) {
 943                         uintptr_t d = (uintptr_t)pm8001_dev
 944                                         - (uintptr_t)&pm8001_ha->devices;
 945                         if (((d % sizeof(*pm8001_dev)) != 0)
 946                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 947                                 continue;
 948                 } else if (pm8001_dev != device_to_close)
 949                         continue;
 950                 tag = ccb->ccb_tag;
 951                 if (!tag || (tag == 0xFFFFFFFF))
 952                         continue;
 953                 task = ccb->task;
 954                 if (!task || !task->task_done)
 955                         continue;
 956                 if (task_to_close && (task != task_to_close))
 957                         continue;
 958                 ts = &task->task_status;
 959                 ts->resp = SAS_TASK_COMPLETE;
 960                 /* Force the midlayer to retry */
 961                 ts->stat = SAS_OPEN_REJECT;
 962                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 963                 if (pm8001_dev)
 964                         atomic_dec(&pm8001_dev->running_req);
 965                 spin_lock_irqsave(&task->task_state_lock, flags1);
 966                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 967                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 968                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 969                 if (unlikely((task->task_state_flags
 970                                 & SAS_TASK_STATE_ABORTED))) {
 971                         spin_unlock_irqrestore(&task->task_state_lock,
 972                                 flags1);
 973                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 974                 } else {
 975                         spin_unlock_irqrestore(&task->task_state_lock,
 976                                 flags1);
 977                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 978                         mb();/* in order to force CPU ordering */
 979                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 980                         task->task_done(task);
 981                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 982                 }
 983         }
 984
 985         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 986 }
 987
 988 /**
 989  * pm8001_I_T_nexus_reset()
 990   * Standard mandates link reset for ATA  (type 0) and hard reset for
 991   * SSP (type 1) , only for RECOVERY
 992   * @dev: the device structure for the device to reset.
 993   */
 994 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 995 {
 996         int rc = TMF_RESP_FUNC_FAILED;
 997         struct pm8001_device *pm8001_dev;
 998         struct pm8001_hba_info *pm8001_ha;
 999         struct sas_phy *phy;
1000
1001         if (!dev || !dev->lldd_dev)
1002                 return -ENODEV;
1003
1004         pm8001_dev = dev->lldd_dev;
1005         pm8001_ha = pm8001_find_ha_by_dev(dev);
1006         phy = sas_get_local_phy(dev);
1007
1008         if (dev_is_sata(dev)) {
1009                 if (scsi_is_sas_phy_local(phy)) {
1010                         rc = 0;
1011                         goto out;
1012                 }
1013                 rc = sas_phy_reset(phy, 1);
1014                 if (rc) {
1015                         pm8001_dbg(pm8001_ha, EH,
1016                                    "phy reset failed for device %x\n"
1017                                    "with rc %d\n", pm8001_dev->device_id, rc);
1018                         rc = TMF_RESP_FUNC_FAILED;
1019                         goto out;
1020                 }
1021                 msleep(2000);
1022                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1023                                                      dev, 1, 0);
1024                 if (rc) {
1025                         pm8001_dbg(pm8001_ha, EH, "task abort failed %x\n"
1026                                    "with rc %d\n", pm8001_dev->device_id, rc);
1027                         rc = TMF_RESP_FUNC_FAILED;
1028                 }
1029         } else {
1030                 rc = sas_phy_reset(phy, 1);
1031                 msleep(2000);
1032         }
1033         pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
1034                    pm8001_dev->device_id, rc);
1035  out:
1036         sas_put_local_phy(phy);
1037         return rc;
1038 }
1039
1040 /*
1041 * This function handle the IT_NEXUS_XXX event or completion
1042 * status code for SSP/SATA/SMP I/O request.
1043 */
1044 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1045 {
1046         int rc = TMF_RESP_FUNC_FAILED;
1047         struct pm8001_device *pm8001_dev;
1048         struct pm8001_hba_info *pm8001_ha;
1049         struct sas_phy *phy;
1050
1051         if (!dev || !dev->lldd_dev)
1052                 return -1;
1053
1054         pm8001_dev = dev->lldd_dev;
1055         pm8001_ha = pm8001_find_ha_by_dev(dev);
1056
1057         pm8001_dbg(pm8001_ha, EH, "I_T_Nexus handler invoked !!\n");
1058
1059         phy = sas_get_local_phy(dev);
1060
1061         if (dev_is_sata(dev)) {
1062                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1063                 if (scsi_is_sas_phy_local(phy)) {
1064                         rc = 0;
1065                         goto out;
1066                 }
1067                 /* send internal ssp/sata/smp abort command to FW */
1068                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1069                                                      dev, 1, 0);
1070                 msleep(100);
1071
1072                 /* deregister the target device */
1073                 pm8001_dev_gone_notify(dev);
1074                 msleep(200);
1075
1076                 /*send phy reset to hard reset target */
1077                 rc = sas_phy_reset(phy, 1);
1078                 msleep(2000);
1079                 pm8001_dev->setds_completion = &completion_setstate;
1080
1081                 wait_for_completion(&completion_setstate);
1082         } else {
1083                 /* send internal ssp/sata/smp abort command to FW */
1084                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1085                                                      dev, 1, 0);
1086                 msleep(100);
1087
1088                 /* deregister the target device */
1089                 pm8001_dev_gone_notify(dev);
1090                 msleep(200);
1091
1092                 /*send phy reset to hard reset target */
1093                 rc = sas_phy_reset(phy, 1);
1094                 msleep(2000);
1095         }
1096         pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
1097                    pm8001_dev->device_id, rc);
1098 out:
1099         sas_put_local_phy(phy);
1100
1101         return rc;
1102 }
1103 /* mandatory SAM-3, the task reset the specified LUN*/
1104 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1105 {
1106         int rc = TMF_RESP_FUNC_FAILED;
1107         struct pm8001_tmf_task tmf_task;
1108         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1109         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1110         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1111         if (dev_is_sata(dev)) {
1112                 struct sas_phy *phy = sas_get_local_phy(dev);
1113                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1114                                                      dev, 1, 0);
1115                 rc = sas_phy_reset(phy, 1);
1116                 sas_put_local_phy(phy);
1117                 pm8001_dev->setds_completion = &completion_setstate;
1118                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1119                         pm8001_dev, DS_OPERATIONAL);
1120                 wait_for_completion(&completion_setstate);
1121         } else {
1122                 tmf_task.tmf = TMF_LU_RESET;
1123                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1124         }
1125         /* If failed, fall-through I_T_Nexus reset */
1126         pm8001_dbg(pm8001_ha, EH, "for device[%x]:rc=%d\n",
1127                    pm8001_dev->device_id, rc);
1128         return rc;
1129 }
1130
1131 /* optional SAM-3 */
1132 int pm8001_query_task(struct sas_task *task)
1133 {
1134         u32 tag = 0xdeadbeef;
1135         struct scsi_lun lun;
1136         struct pm8001_tmf_task tmf_task;
1137         int rc = TMF_RESP_FUNC_FAILED;
1138         if (unlikely(!task || !task->lldd_task || !task->dev))
1139                 return rc;
1140
1141         if (task->task_proto & SAS_PROTOCOL_SSP) {
1142                 struct scsi_cmnd *cmnd = task->uldd_task;
1143                 struct domain_device *dev = task->dev;
1144                 struct pm8001_hba_info *pm8001_ha =
1145                         pm8001_find_ha_by_dev(dev);
1146
1147                 int_to_scsilun(cmnd->device->lun, &lun);
1148                 rc = pm8001_find_tag(task, &tag);
1149                 if (rc == 0) {
1150                         rc = TMF_RESP_FUNC_FAILED;
1151                         return rc;
1152                 }
1153                 pm8001_dbg(pm8001_ha, EH, "Query:[%16ph]\n", cmnd->cmnd);
1154                 tmf_task.tmf =  TMF_QUERY_TASK;
1155                 tmf_task.tag_of_task_to_be_managed = tag;
1156
1157                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1158                 switch (rc) {
1159                 /* The task is still in Lun, release it then */
1160                 case TMF_RESP_FUNC_SUCC:
1161                         pm8001_dbg(pm8001_ha, EH,
1162                                    "The task is still in Lun\n");
1163                         break;
1164                 /* The task is not in Lun or failed, reset the phy */
1165                 case TMF_RESP_FUNC_FAILED:
1166                 case TMF_RESP_FUNC_COMPLETE:
1167                         pm8001_dbg(pm8001_ha, EH,
1168                                    "The task is not in Lun or failed, reset the phy\n");
1169                         break;
1170                 }
1171         }
1172         pr_err("pm80xx: rc= %d\n", rc);
1173         return rc;
1174 }
1175
1176 /*  mandatory SAM-3, still need free task/ccb info, abort the specified task */
1177 int pm8001_abort_task(struct sas_task *task)
1178 {
1179         unsigned long flags;
1180         u32 tag;
1181         struct domain_device *dev ;
1182         struct pm8001_hba_info *pm8001_ha;
1183         struct scsi_lun lun;
1184         struct pm8001_device *pm8001_dev;
1185         struct pm8001_tmf_task tmf_task;
1186         int rc = TMF_RESP_FUNC_FAILED, ret;
1187         u32 phy_id;
1188         struct sas_task_slow slow_task;
1189
1190         if (unlikely(!task || !task->lldd_task || !task->dev))
1191                 return TMF_RESP_FUNC_FAILED;
1192
1193         dev = task->dev;
1194         pm8001_dev = dev->lldd_dev;
1195         pm8001_ha = pm8001_find_ha_by_dev(dev);
1196         phy_id = pm8001_dev->attached_phy;
1197
1198         if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
1199                 // If the controller is seeing fatal errors
1200                 // abort task will not get a response from the controller
1201                 return TMF_RESP_FUNC_FAILED;
1202         }
1203
1204         ret = pm8001_find_tag(task, &tag);
1205         if (ret == 0) {
1206                 pm8001_info(pm8001_ha, "no tag for task:%p\n", task);
1207                 return TMF_RESP_FUNC_FAILED;
1208         }
1209         spin_lock_irqsave(&task->task_state_lock, flags);
1210         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1211                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1212                 return TMF_RESP_FUNC_COMPLETE;
1213         }
1214         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1215         if (task->slow_task == NULL) {
1216                 init_completion(&slow_task.completion);
1217                 task->slow_task = &slow_task;
1218         }
1219         spin_unlock_irqrestore(&task->task_state_lock, flags);
1220         if (task->task_proto & SAS_PROTOCOL_SSP) {
1221                 struct scsi_cmnd *cmnd = task->uldd_task;
1222                 int_to_scsilun(cmnd->device->lun, &lun);
1223                 tmf_task.tmf = TMF_ABORT_TASK;
1224                 tmf_task.tag_of_task_to_be_managed = tag;
1225                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1226                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1227                         pm8001_dev->sas_device, 0, tag);
1228         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1229                 task->task_proto & SAS_PROTOCOL_STP) {
1230                 if (pm8001_ha->chip_id == chip_8006) {
1231                         DECLARE_COMPLETION_ONSTACK(completion_reset);
1232                         DECLARE_COMPLETION_ONSTACK(completion);
1233                         struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1234
1235                         /* 1. Set Device state as Recovery */
1236                         pm8001_dev->setds_completion = &completion;
1237                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1238                                 pm8001_dev, DS_IN_RECOVERY);
1239                         wait_for_completion(&completion);
1240
1241                         /* 2. Send Phy Control Hard Reset */
1242                         reinit_completion(&completion);
1243                         phy->port_reset_status = PORT_RESET_TMO;
1244                         phy->reset_success = false;
1245                         phy->enable_completion = &completion;
1246                         phy->reset_completion = &completion_reset;
1247                         ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1248                                 PHY_HARD_RESET);
1249                         if (ret) {
1250                                 phy->enable_completion = NULL;
1251                                 phy->reset_completion = NULL;
1252                                 goto out;
1253                         }
1254
1255                         /* In the case of the reset timeout/fail we still
1256                          * abort the command at the firmware. The assumption
1257                          * here is that the drive is off doing something so
1258                          * that it's not processing requests, and we want to
1259                          * avoid getting a completion for this and either
1260                          * leaking the task in libsas or losing the race and
1261                          * getting a double free.
1262                          */
1263                         pm8001_dbg(pm8001_ha, MSG,
1264                                    "Waiting for local phy ctl\n");
1265                         ret = wait_for_completion_timeout(&completion,
1266                                         PM8001_TASK_TIMEOUT * HZ);
1267                         if (!ret || !phy->reset_success) {
1268                                 phy->enable_completion = NULL;
1269                                 phy->reset_completion = NULL;
1270                         } else {
1271                                 /* 3. Wait for Port Reset complete or
1272                                  * Port reset TMO
1273                                  */
1274                                 pm8001_dbg(pm8001_ha, MSG,
1275                                            "Waiting for Port reset\n");
1276                                 ret = wait_for_completion_timeout(
1277                                         &completion_reset,
1278                                         PM8001_TASK_TIMEOUT * HZ);
1279                                 if (!ret)
1280                                         phy->reset_completion = NULL;
1281                                 WARN_ON(phy->port_reset_status ==
1282                                                 PORT_RESET_TMO);
1283                                 if (phy->port_reset_status == PORT_RESET_TMO) {
1284                                         pm8001_dev_gone_notify(dev);
1285                                         goto out;
1286                                 }
1287                         }
1288
1289                         /*
1290                          * 4. SATA Abort ALL
1291                          * we wait for the task to be aborted so that the task
1292                          * is removed from the ccb. on success the caller is
1293                          * going to free the task.
1294                          */
1295                         ret = pm8001_exec_internal_task_abort(pm8001_ha,
1296                                 pm8001_dev, pm8001_dev->sas_device, 1, tag);
1297                         if (ret)
1298                                 goto out;
1299                         ret = wait_for_completion_timeout(
1300                                 &task->slow_task->completion,
1301                                 PM8001_TASK_TIMEOUT * HZ);
1302                         if (!ret)
1303                                 goto out;
1304
1305                         /* 5. Set Device State as Operational */
1306                         reinit_completion(&completion);
1307                         pm8001_dev->setds_completion = &completion;
1308                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1309                                 pm8001_dev, DS_OPERATIONAL);
1310                         wait_for_completion(&completion);
1311                 } else {
1312                         rc = pm8001_exec_internal_task_abort(pm8001_ha,
1313                                 pm8001_dev, pm8001_dev->sas_device, 0, tag);
1314                 }
1315                 rc = TMF_RESP_FUNC_COMPLETE;
1316         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1317                 /* SMP */
1318                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1319                         pm8001_dev->sas_device, 0, tag);
1320
1321         }
1322 out:
1323         spin_lock_irqsave(&task->task_state_lock, flags);
1324         if (task->slow_task == &slow_task)
1325                 task->slow_task = NULL;
1326         spin_unlock_irqrestore(&task->task_state_lock, flags);
1327         if (rc != TMF_RESP_FUNC_COMPLETE)
1328                 pm8001_info(pm8001_ha, "rc= %d\n", rc);
1329         return rc;
1330 }
1331
1332 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1333 {
1334         struct pm8001_tmf_task tmf_task;
1335
1336         tmf_task.tmf = TMF_ABORT_TASK_SET;
1337         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1338 }
1339
1340 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1341 {
1342         struct pm8001_tmf_task tmf_task;
1343
1344         tmf_task.tmf = TMF_CLEAR_ACA;
1345         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1346 }
1347
1348 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1349 {
1350         struct pm8001_tmf_task tmf_task;
1351         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1352         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1353
1354         pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",
1355                    pm8001_dev->device_id);
1356         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1357         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1358 }