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