drivers/scsi/pm8001/pm8001_sas.c

   1 /*
   2  * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
   3  *
   4  * Copyright (c) 2008-2009 USI Co., Ltd.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification.
  13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14  *    substantially similar to the "NO WARRANTY" disclaimer below
  15  *    ("Disclaimer") and any redistribution must be conditioned upon
  16  *    including a substantially similar Disclaimer requirement for further
  17  *    binary redistribution.
  18  * 3. Neither the names of the above-listed copyright holders nor the names
  19  *    of any contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * Alternatively, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2 as published by the Free
  24  * Software Foundation.
  25  *
  26  * NO WARRANTY
  27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  30  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  36  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGES.
  38  *
  39  */
  40
  41 #include <linux/slab.h>
  42 #include "pm8001_sas.h"
  43 #include "pm80xx_tracepoints.h"
  44
  45 /**
  46  * pm8001_find_tag - from sas task to find out  tag that belongs to this task
  47  * @task: the task sent to the LLDD
  48  * @tag: the found tag associated with the task
  49  */
  50 static int pm8001_find_tag(struct sas_task *task, u32 *tag)
  51 {
  52         if (task->lldd_task) {
  53                 struct pm8001_ccb_info *ccb;
  54                 ccb = task->lldd_task;
  55                 *tag = ccb->ccb_tag;
  56                 return 1;
  57         }
  58         return 0;
  59 }
  60
  61 /**
  62   * pm8001_tag_free - free the no more needed tag
  63   * @pm8001_ha: our hba struct
  64   * @tag: the found tag associated with the task
  65   */
  66 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
  67 {
  68         void *bitmap = pm8001_ha->tags;
  69         clear_bit(tag, bitmap);
  70 }
  71
  72 /**
  73   * pm8001_tag_alloc - allocate a empty tag for task used.
  74   * @pm8001_ha: our hba struct
  75   * @tag_out: the found empty tag .
  76   */
  77 inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
  78 {
  79         unsigned int tag;
  80         void *bitmap = pm8001_ha->tags;
  81         unsigned long flags;
  82
  83         spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
  84         tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
  85         if (tag >= pm8001_ha->tags_num) {
  86                 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  87                 return -SAS_QUEUE_FULL;
  88         }
  89         set_bit(tag, bitmap);
  90         spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  91         *tag_out = tag;
  92         return 0;
  93 }
  94
  95 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
  96 {
  97         int i;
  98         for (i = 0; i < pm8001_ha->tags_num; ++i)
  99                 pm8001_tag_free(pm8001_ha, i);
 100 }
 101
 102 /**
 103  * pm8001_mem_alloc - allocate memory for pm8001.
 104  * @pdev: pci device.
 105  * @virt_addr: the allocated virtual address
 106  * @pphys_addr: DMA address for this device
 107  * @pphys_addr_hi: the physical address high byte address.
 108  * @pphys_addr_lo: the physical address low byte address.
 109  * @mem_size: memory size.
 110  * @align: requested byte alignment
 111  */
 112 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
 113         dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
 114         u32 *pphys_addr_lo, u32 mem_size, u32 align)
 115 {
 116         caddr_t mem_virt_alloc;
 117         dma_addr_t mem_dma_handle;
 118         u64 phys_align;
 119         u64 align_offset = 0;
 120         if (align)
 121                 align_offset = (dma_addr_t)align - 1;
 122         mem_virt_alloc = dma_alloc_coherent(&pdev->dev, mem_size + align,
 123                                             &mem_dma_handle, GFP_KERNEL);
 124         if (!mem_virt_alloc)
 125                 return -ENOMEM;
 126         *pphys_addr = mem_dma_handle;
 127         phys_align = (*pphys_addr + align_offset) & ~align_offset;
 128         *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
 129         *pphys_addr_hi = upper_32_bits(phys_align);
 130         *pphys_addr_lo = lower_32_bits(phys_align);
 131         return 0;
 132 }
 133
 134 /**
 135   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 136   * find out our hba struct.
 137   * @dev: the domain device which from sas layer.
 138   */
 139 static
 140 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 141 {
 142         struct sas_ha_struct *sha = dev->port->ha;
 143         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 144         return pm8001_ha;
 145 }
 146
 147 /**
 148   * pm8001_phy_control - this function should be registered to
 149   * sas_domain_function_template to provide libsas used, note: this is just
 150   * control the HBA phy rather than other expander phy if you want control
 151   * other phy, you should use SMP command.
 152   * @sas_phy: which phy in HBA phys.
 153   * @func: the operation.
 154   * @funcdata: always NULL.
 155   */
 156 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 157         void *funcdata)
 158 {
 159         int rc = 0, phy_id = sas_phy->id;
 160         struct pm8001_hba_info *pm8001_ha = NULL;
 161         struct sas_phy_linkrates *rates;
 162         struct pm8001_phy *phy;
 163         DECLARE_COMPLETION_ONSTACK(completion);
 164         unsigned long flags;
 165         pm8001_ha = sas_phy->ha->lldd_ha;
 166         phy = &pm8001_ha->phy[phy_id];
 167         pm8001_ha->phy[phy_id].enable_completion = &completion;
 168         switch (func) {
 169         case PHY_FUNC_SET_LINK_RATE:
 170                 rates = funcdata;
 171                 if (rates->minimum_linkrate) {
 172                         pm8001_ha->phy[phy_id].minimum_linkrate =
 173                                 rates->minimum_linkrate;
 174                 }
 175                 if (rates->maximum_linkrate) {
 176                         pm8001_ha->phy[phy_id].maximum_linkrate =
 177                                 rates->maximum_linkrate;
 178                 }
 179                 if (pm8001_ha->phy[phy_id].phy_state ==  PHY_LINK_DISABLE) {
 180                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 181                         wait_for_completion(&completion);
 182                 }
 183                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 184                                               PHY_LINK_RESET);
 185                 break;
 186         case PHY_FUNC_HARD_RESET:
 187                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 188                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 189                         wait_for_completion(&completion);
 190                 }
 191                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 192                                               PHY_HARD_RESET);
 193                 break;
 194         case PHY_FUNC_LINK_RESET:
 195                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 196                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 197                         wait_for_completion(&completion);
 198                 }
 199                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 200                                               PHY_LINK_RESET);
 201                 break;
 202         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 203                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 204                                               PHY_LINK_RESET);
 205                 break;
 206         case PHY_FUNC_DISABLE:
 207                 if (pm8001_ha->chip_id != chip_8001) {
 208                         if (pm8001_ha->phy[phy_id].phy_state ==
 209                                 PHY_STATE_LINK_UP_SPCV) {
 210                                 sas_phy_disconnected(&phy->sas_phy);
 211                                 sas_notify_phy_event(&phy->sas_phy,
 212                                         PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
 213                                 phy->phy_attached = 0;
 214                         }
 215                 } else {
 216                         if (pm8001_ha->phy[phy_id].phy_state ==
 217                                 PHY_STATE_LINK_UP_SPC) {
 218                                 sas_phy_disconnected(&phy->sas_phy);
 219                                 sas_notify_phy_event(&phy->sas_phy,
 220                                         PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
 221                                 phy->phy_attached = 0;
 222                         }
 223                 }
 224                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 225                 break;
 226         case PHY_FUNC_GET_EVENTS:
 227                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 228                 if (pm8001_ha->chip_id == chip_8001) {
 229                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 230                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 231                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 232                                 return -EINVAL;
 233                         }
 234                 }
 235                 {
 236                         struct sas_phy *phy = sas_phy->phy;
 237                         uint32_t *qp = (uint32_t *)(((char *)
 238                                 pm8001_ha->io_mem[2].memvirtaddr)
 239                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 240
 241                         phy->invalid_dword_count = qp[0];
 242                         phy->running_disparity_error_count = qp[1];
 243                         phy->loss_of_dword_sync_count = qp[3];
 244                         phy->phy_reset_problem_count = qp[4];
 245                 }
 246                 if (pm8001_ha->chip_id == chip_8001)
 247                         pm8001_bar4_shift(pm8001_ha, 0);
 248                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 249                 return 0;
 250         default:
 251                 pm8001_dbg(pm8001_ha, DEVIO, "func 0x%x\n", func);
 252                 rc = -EOPNOTSUPP;
 253         }
 254         msleep(300);
 255         return rc;
 256 }
 257
 258 /**
 259   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 260   * command to HBA.
 261   * @shost: the scsi host data.
 262   */
 263 void pm8001_scan_start(struct Scsi_Host *shost)
 264 {
 265         int i;
 266         struct pm8001_hba_info *pm8001_ha;
 267         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 268         DECLARE_COMPLETION_ONSTACK(completion);
 269         pm8001_ha = sha->lldd_ha;
 270         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 271         if (pm8001_ha->chip_id == chip_8001)
 272                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 273         for (i = 0; i < pm8001_ha->chip->n_phy; ++i) {
 274                 pm8001_ha->phy[i].enable_completion = &completion;
 275                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 276                 wait_for_completion(&completion);
 277                 msleep(300);
 278         }
 279 }
 280
 281 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 282 {
 283         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 284
 285         /* give the phy enabling interrupt event time to come in (1s
 286         * is empirically about all it takes) */
 287         if (time < HZ)
 288                 return 0;
 289         /* Wait for discovery to finish */
 290         sas_drain_work(ha);
 291         return 1;
 292 }
 293
 294 /**
 295   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 296   * @pm8001_ha: our hba card information
 297   * @ccb: the ccb which attached to smp task
 298   */
 299 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 300         struct pm8001_ccb_info *ccb)
 301 {
 302         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 303 }
 304
 305 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 306 {
 307         struct ata_queued_cmd *qc = task->uldd_task;
 308         if (qc) {
 309                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 310                     qc->tf.command == ATA_CMD_FPDMA_READ ||
 311                     qc->tf.command == ATA_CMD_FPDMA_RECV ||
 312                     qc->tf.command == ATA_CMD_FPDMA_SEND ||
 313                     qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
 314                         *tag = qc->tag;
 315                         return 1;
 316                 }
 317         }
 318         return 0;
 319 }
 320
 321 /**
 322   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 323   * @pm8001_ha: our hba card information
 324   * @ccb: the ccb which attached to sata task
 325   */
 326 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 327         struct pm8001_ccb_info *ccb)
 328 {
 329         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 330 }
 331
 332 /**
 333   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 334   * @pm8001_ha: our hba card information
 335   * @ccb: the ccb which attached to TM
 336   * @tmf: the task management IU
 337   */
 338 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 339         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 340 {
 341         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 342 }
 343
 344 /**
 345   * pm8001_task_prep_ssp - the dispatcher function, prepare ssp data for ssp task
 346   * @pm8001_ha: our hba card information
 347   * @ccb: the ccb which attached to ssp task
 348   */
 349 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 350         struct pm8001_ccb_info *ccb)
 351 {
 352         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 353 }
 354
 355  /* Find the local port id that's attached to this device */
 356 static int sas_find_local_port_id(struct domain_device *dev)
 357 {
 358         struct domain_device *pdev = dev->parent;
 359
 360         /* Directly attached device */
 361         if (!pdev)
 362                 return dev->port->id;
 363         while (pdev) {
 364                 struct domain_device *pdev_p = pdev->parent;
 365                 if (!pdev_p)
 366                         return pdev->port->id;
 367                 pdev = pdev->parent;
 368         }
 369         return 0;
 370 }
 371
 372 #define DEV_IS_GONE(pm8001_dev) \
 373         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 374 /**
 375   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 376   * @task: the task to be execute.
 377   * @gfp_flags: gfp_flags.
 378   * @is_tmf: if it is task management task.
 379   * @tmf: the task management IU
 380   */
 381 static int pm8001_task_exec(struct sas_task *task,
 382         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 383 {
 384         struct domain_device *dev = task->dev;
 385         struct pm8001_hba_info *pm8001_ha;
 386         struct pm8001_device *pm8001_dev;
 387         struct pm8001_port *port = NULL;
 388         struct sas_task *t = task;
 389         struct pm8001_ccb_info *ccb;
 390         u32 tag = 0xdeadbeef, rc = 0, n_elem = 0;
 391         unsigned long flags = 0;
 392         enum sas_protocol task_proto = t->task_proto;
 393
 394         if (!dev->port) {
 395                 struct task_status_struct *tsm = &t->task_status;
 396                 tsm->resp = SAS_TASK_UNDELIVERED;
 397                 tsm->stat = SAS_PHY_DOWN;
 398                 if (dev->dev_type != SAS_SATA_DEV)
 399                         t->task_done(t);
 400                 return 0;
 401         }
 402         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 403         if (pm8001_ha->controller_fatal_error) {
 404                 struct task_status_struct *ts = &t->task_status;
 405
 406                 ts->resp = SAS_TASK_UNDELIVERED;
 407                 t->task_done(t);
 408                 return 0;
 409         }
 410         pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec device\n");
 411         spin_lock_irqsave(&pm8001_ha->lock, flags);
 412         do {
 413                 dev = t->dev;
 414                 pm8001_dev = dev->lldd_dev;
 415                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 416                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 417                         if (sas_protocol_ata(task_proto)) {
 418                                 struct task_status_struct *ts = &t->task_status;
 419                                 ts->resp = SAS_TASK_UNDELIVERED;
 420                                 ts->stat = SAS_PHY_DOWN;
 421
 422                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 423                                 t->task_done(t);
 424                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 425                                 continue;
 426                         } else {
 427                                 struct task_status_struct *ts = &t->task_status;
 428                                 ts->resp = SAS_TASK_UNDELIVERED;
 429                                 ts->stat = SAS_PHY_DOWN;
 430                                 t->task_done(t);
 431                                 continue;
 432                         }
 433                 }
 434                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 435                 if (rc)
 436                         goto err_out;
 437                 ccb = &pm8001_ha->ccb_info[tag];
 438
 439                 if (!sas_protocol_ata(task_proto)) {
 440                         if (t->num_scatter) {
 441                                 n_elem = dma_map_sg(pm8001_ha->dev,
 442                                         t->scatter,
 443                                         t->num_scatter,
 444                                         t->data_dir);
 445                                 if (!n_elem) {
 446                                         rc = -ENOMEM;
 447                                         goto err_out_tag;
 448                                 }
 449                         }
 450                 } else {
 451                         n_elem = t->num_scatter;
 452                 }
 453
 454                 t->lldd_task = ccb;
 455                 ccb->n_elem = n_elem;
 456                 ccb->ccb_tag = tag;
 457                 ccb->task = t;
 458                 ccb->device = pm8001_dev;
 459                 switch (task_proto) {
 460                 case SAS_PROTOCOL_SMP:
 461                         atomic_inc(&pm8001_dev->running_req);
 462                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 463                         break;
 464                 case SAS_PROTOCOL_SSP:
 465                         atomic_inc(&pm8001_dev->running_req);
 466                         if (is_tmf)
 467                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 468                                         ccb, tmf);
 469                         else
 470                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 471                         break;
 472                 case SAS_PROTOCOL_SATA:
 473                 case SAS_PROTOCOL_STP:
 474                         atomic_inc(&pm8001_dev->running_req);
 475                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 476                         break;
 477                 default:
 478                         dev_printk(KERN_ERR, pm8001_ha->dev,
 479                                 "unknown sas_task proto: 0x%x\n", task_proto);
 480                         rc = -EINVAL;
 481                         break;
 482                 }
 483
 484                 if (rc) {
 485                         pm8001_dbg(pm8001_ha, IO, "rc is %x\n", rc);
 486                         atomic_dec(&pm8001_dev->running_req);
 487                         goto err_out_tag;
 488                 }
 489                 /* TODO: select normal or high priority */
 490                 spin_lock(&t->task_state_lock);
 491                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 492                 spin_unlock(&t->task_state_lock);
 493         } while (0);
 494         rc = 0;
 495         goto out_done;
 496
 497 err_out_tag:
 498         pm8001_tag_free(pm8001_ha, tag);
 499 err_out:
 500         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 501         if (!sas_protocol_ata(task_proto))
 502                 if (n_elem)
 503                         dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
 504                                 t->data_dir);
 505 out_done:
 506         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 507         return rc;
 508 }
 509
 510 /**
 511   * pm8001_queue_command - register for upper layer used, all IO commands sent
 512   * to HBA are from this interface.
 513   * @task: the task to be execute.
 514   * @gfp_flags: gfp_flags
 515   */
 516 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 517 {
 518         return pm8001_task_exec(task, gfp_flags, 0, NULL);
 519 }
 520
 521 /**
 522   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 523   * @pm8001_ha: our hba card information
 524   * @ccb: the ccb which attached to ssp task
 525   * @task: the task to be free.
 526   * @ccb_idx: ccb index.
 527   */
 528 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 529         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 530 {
 531         struct ata_queued_cmd *qc;
 532         struct pm8001_device *pm8001_dev;
 533
 534         if (!ccb->task)
 535                 return;
 536         if (!sas_protocol_ata(task->task_proto))
 537                 if (ccb->n_elem)
 538                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 539                                 task->num_scatter, task->data_dir);
 540
 541         switch (task->task_proto) {
 542         case SAS_PROTOCOL_SMP:
 543                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 544                         DMA_FROM_DEVICE);
 545                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 546                         DMA_TO_DEVICE);
 547                 break;
 548
 549         case SAS_PROTOCOL_SATA:
 550         case SAS_PROTOCOL_STP:
 551         case SAS_PROTOCOL_SSP:
 552         default:
 553                 /* do nothing */
 554                 break;
 555         }
 556
 557         if (sas_protocol_ata(task->task_proto)) {
 558                 // For SCSI/ATA commands uldd_task points to ata_queued_cmd
 559                 qc = task->uldd_task;
 560                 pm8001_dev = ccb->device;
 561                 trace_pm80xx_request_complete(pm8001_ha->id,
 562                         pm8001_dev ? pm8001_dev->attached_phy : PM8001_MAX_PHYS,
 563                         ccb_idx, 0 /* ctlr_opcode not known */,
 564                         qc ? qc->tf.command : 0, // ata opcode
 565                         pm8001_dev ? atomic_read(&pm8001_dev->running_req) : -1);
 566         }
 567
 568         task->lldd_task = NULL;
 569         ccb->task = NULL;
 570         ccb->ccb_tag = 0xFFFFFFFF;
 571         ccb->open_retry = 0;
 572         pm8001_tag_free(pm8001_ha, ccb_idx);
 573 }
 574
 575 /**
 576  * pm8001_alloc_dev - find a empty pm8001_device
 577  * @pm8001_ha: our hba card information
 578  */
 579 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 580 {
 581         u32 dev;
 582         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 583                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 584                         pm8001_ha->devices[dev].id = dev;
 585                         return &pm8001_ha->devices[dev];
 586                 }
 587         }
 588         if (dev == PM8001_MAX_DEVICES) {
 589                 pm8001_dbg(pm8001_ha, FAIL,
 590                            "max support %d devices, ignore ..\n",
 591                            PM8001_MAX_DEVICES);
 592         }
 593         return NULL;
 594 }
 595 /**
 596   * pm8001_find_dev - find a matching pm8001_device
 597   * @pm8001_ha: our hba card information
 598   * @device_id: device ID to match against
 599   */
 600 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 601                                         u32 device_id)
 602 {
 603         u32 dev;
 604         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 605                 if (pm8001_ha->devices[dev].device_id == device_id)
 606                         return &pm8001_ha->devices[dev];
 607         }
 608         if (dev == PM8001_MAX_DEVICES) {
 609                 pm8001_dbg(pm8001_ha, FAIL, "NO MATCHING DEVICE FOUND !!!\n");
 610         }
 611         return NULL;
 612 }
 613
 614 void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 615 {
 616         u32 id = pm8001_dev->id;
 617         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 618         pm8001_dev->id = id;
 619         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 620         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 621         pm8001_dev->sas_device = NULL;
 622 }
 623
 624 /**
 625   * pm8001_dev_found_notify - libsas notify a device is found.
 626   * @dev: the device structure which sas layer used.
 627   *
 628   * when libsas find a sas domain device, it should tell the LLDD that
 629   * device is found, and then LLDD register this device to HBA firmware
 630   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 631   * device ID(according to device's sas address) and returned it to LLDD. From
 632   * now on, we communicate with HBA FW with the device ID which HBA assigned
 633   * rather than sas address. it is the necessary step for our HBA but it is
 634   * the optional for other HBA driver.
 635   */
 636 static int pm8001_dev_found_notify(struct domain_device *dev)
 637 {
 638         unsigned long flags = 0;
 639         int res = 0;
 640         struct pm8001_hba_info *pm8001_ha = NULL;
 641         struct domain_device *parent_dev = dev->parent;
 642         struct pm8001_device *pm8001_device;
 643         DECLARE_COMPLETION_ONSTACK(completion);
 644         u32 flag = 0;
 645         pm8001_ha = pm8001_find_ha_by_dev(dev);
 646         spin_lock_irqsave(&pm8001_ha->lock, flags);
 647
 648         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 649         if (!pm8001_device) {
 650                 res = -1;
 651                 goto found_out;
 652         }
 653         pm8001_device->sas_device = dev;
 654         dev->lldd_dev = pm8001_device;
 655         pm8001_device->dev_type = dev->dev_type;
 656         pm8001_device->dcompletion = &completion;
 657         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 658                 int phy_id;
 659                 struct ex_phy *phy;
 660                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 661                 phy_id++) {
 662                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 663                         if (SAS_ADDR(phy->attached_sas_addr)
 664                                 == SAS_ADDR(dev->sas_addr)) {
 665                                 pm8001_device->attached_phy = phy_id;
 666                                 break;
 667                         }
 668                 }
 669                 if (phy_id == parent_dev->ex_dev.num_phys) {
 670                         pm8001_dbg(pm8001_ha, FAIL,
 671                                    "Error: no attached dev:%016llx at ex:%016llx.\n",
 672                                    SAS_ADDR(dev->sas_addr),
 673                                    SAS_ADDR(parent_dev->sas_addr));
 674                         res = -1;
 675                 }
 676         } else {
 677                 if (dev->dev_type == SAS_SATA_DEV) {
 678                         pm8001_device->attached_phy =
 679                                 dev->rphy->identify.phy_identifier;
 680                         flag = 1; /* directly sata */
 681                 }
 682         } /*register this device to HBA*/
 683         pm8001_dbg(pm8001_ha, DISC, "Found device\n");
 684         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 685         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 686         wait_for_completion(&completion);
 687         if (dev->dev_type == SAS_END_DEVICE)
 688                 msleep(50);
 689         pm8001_ha->flags = PM8001F_RUN_TIME;
 690         return 0;
 691 found_out:
 692         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 693         return res;
 694 }
 695
 696 int pm8001_dev_found(struct domain_device *dev)
 697 {
 698         return pm8001_dev_found_notify(dev);
 699 }
 700
 701 void pm8001_task_done(struct sas_task *task)
 702 {
 703         del_timer(&task->slow_task->timer);
 704         complete(&task->slow_task->completion);
 705 }
 706
 707 static void pm8001_tmf_timedout(struct timer_list *t)
 708 {
 709         struct sas_task_slow *slow = from_timer(slow, t, timer);
 710         struct sas_task *task = slow->task;
 711         unsigned long flags;
 712
 713         spin_lock_irqsave(&task->task_state_lock, flags);
 714         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 715                 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 716                 complete(&task->slow_task->completion);
 717         }
 718         spin_unlock_irqrestore(&task->task_state_lock, flags);
 719 }
 720
 721 #define PM8001_TASK_TIMEOUT 20
 722 /**
 723   * pm8001_exec_internal_tmf_task - execute some task management commands.
 724   * @dev: the wanted device.
 725   * @tmf: which task management wanted to be take.
 726   * @para_len: para_len.
 727   * @parameter: ssp task parameter.
 728   *
 729   * when errors or exception happened, we may want to do something, for example
 730   * abort the issued task which result in this exception, it is done by calling
 731   * this function, note it is also with the task execute interface.
 732   */
 733 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 734         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 735 {
 736         int res, retry;
 737         struct sas_task *task = NULL;
 738         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 739         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 740         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 741
 742         for (retry = 0; retry < 3; retry++) {
 743                 task = sas_alloc_slow_task(GFP_KERNEL);
 744                 if (!task)
 745                         return -ENOMEM;
 746
 747                 task->dev = dev;
 748                 task->task_proto = dev->tproto;
 749                 memcpy(&task->ssp_task, parameter, para_len);
 750                 task->task_done = pm8001_task_done;
 751                 task->slow_task->timer.function = pm8001_tmf_timedout;
 752                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 753                 add_timer(&task->slow_task->timer);
 754
 755                 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 756
 757                 if (res) {
 758                         del_timer(&task->slow_task->timer);
 759                         pm8001_dbg(pm8001_ha, FAIL, "Executing internal task failed\n");
 760                         goto ex_err;
 761                 }
 762                 wait_for_completion(&task->slow_task->completion);
 763                 if (pm8001_ha->chip_id != chip_8001) {
 764                         pm8001_dev->setds_completion = &completion_setstate;
 765                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 766                                 pm8001_dev, DS_OPERATIONAL);
 767                         wait_for_completion(&completion_setstate);
 768                 }
 769                 res = -TMF_RESP_FUNC_FAILED;
 770                 /* Even TMF timed out, return direct. */
 771                 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
 772                         pm8001_dbg(pm8001_ha, FAIL, "TMF task[%x]timeout.\n",
 773                                    tmf->tmf);
 774                         goto ex_err;
 775                 }
 776
 777                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 778                         task->task_status.stat == SAS_SAM_STAT_GOOD) {
 779                         res = TMF_RESP_FUNC_COMPLETE;
 780                         break;
 781                 }
 782
 783                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 784                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 785                         /* no error, but return the number of bytes of
 786                         * underrun */
 787                         res = task->task_status.residual;
 788                         break;
 789                 }
 790
 791                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 792                         task->task_status.stat == SAS_DATA_OVERRUN) {
 793                         pm8001_dbg(pm8001_ha, FAIL, "Blocked task error.\n");
 794                         res = -EMSGSIZE;
 795                         break;
 796                 } else {
 797                         pm8001_dbg(pm8001_ha, EH,
 798                                    " Task to dev %016llx response:0x%x status 0x%x\n",
 799                                    SAS_ADDR(dev->sas_addr),
 800                                    task->task_status.resp,
 801                                    task->task_status.stat);
 802                         sas_free_task(task);
 803                         task = NULL;
 804                 }
 805         }
 806 ex_err:
 807         BUG_ON(retry == 3 && task != NULL);
 808         sas_free_task(task);
 809         return res;
 810 }
 811
 812 static int
 813 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 814         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 815         u32 task_tag)
 816 {
 817         int res, retry;
 818         u32 ccb_tag;
 819         struct pm8001_ccb_info *ccb;
 820         struct sas_task *task = NULL;
 821
 822         for (retry = 0; retry < 3; retry++) {
 823                 task = sas_alloc_slow_task(GFP_KERNEL);
 824                 if (!task)
 825                         return -ENOMEM;
 826
 827                 task->dev = dev;
 828                 task->task_proto = dev->tproto;
 829                 task->task_done = pm8001_task_done;
 830                 task->slow_task->timer.function = pm8001_tmf_timedout;
 831                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 832                 add_timer(&task->slow_task->timer);
 833
 834                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 835                 if (res)
 836                         goto ex_err;
 837                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 838                 ccb->device = pm8001_dev;
 839                 ccb->ccb_tag = ccb_tag;
 840                 ccb->task = task;
 841                 ccb->n_elem = 0;
 842
 843                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 844                         pm8001_dev, flag, task_tag, ccb_tag);
 845
 846                 if (res) {
 847                         del_timer(&task->slow_task->timer);
 848                         pm8001_dbg(pm8001_ha, FAIL, "Executing internal task failed\n");
 849                         goto ex_err;
 850                 }
 851                 wait_for_completion(&task->slow_task->completion);
 852                 res = TMF_RESP_FUNC_FAILED;
 853                 /* Even TMF timed out, return direct. */
 854                 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
 855                         pm8001_dbg(pm8001_ha, FAIL, "TMF task timeout.\n");
 856                         goto ex_err;
 857                 }
 858
 859                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 860                         task->task_status.stat == SAS_SAM_STAT_GOOD) {
 861                         res = TMF_RESP_FUNC_COMPLETE;
 862                         break;
 863
 864                 } else {
 865                         pm8001_dbg(pm8001_ha, EH,
 866                                    " Task to dev %016llx response: 0x%x status 0x%x\n",
 867                                    SAS_ADDR(dev->sas_addr),
 868                                    task->task_status.resp,
 869                                    task->task_status.stat);
 870                         sas_free_task(task);
 871                         task = NULL;
 872                 }
 873         }
 874 ex_err:
 875         BUG_ON(retry == 3 && task != NULL);
 876         sas_free_task(task);
 877         return res;
 878 }
 879
 880 /**
 881   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 882   * @dev: the device structure which sas layer used.
 883   */
 884 static void pm8001_dev_gone_notify(struct domain_device *dev)
 885 {
 886         unsigned long flags = 0;
 887         struct pm8001_hba_info *pm8001_ha;
 888         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 889
 890         pm8001_ha = pm8001_find_ha_by_dev(dev);
 891         spin_lock_irqsave(&pm8001_ha->lock, flags);
 892         if (pm8001_dev) {
 893                 u32 device_id = pm8001_dev->device_id;
 894
 895                 pm8001_dbg(pm8001_ha, DISC, "found dev[%d:%x] is gone.\n",
 896                            pm8001_dev->device_id, pm8001_dev->dev_type);
 897                 if (atomic_read(&pm8001_dev->running_req)) {
 898                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 899                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
 900                                                         dev, 1, 0);
 901                         while (atomic_read(&pm8001_dev->running_req))
 902                                 msleep(20);
 903                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 904                 }
 905                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 906                 pm8001_free_dev(pm8001_dev);
 907         } else {
 908                 pm8001_dbg(pm8001_ha, DISC, "Found dev has gone.\n");
 909         }
 910         dev->lldd_dev = NULL;
 911         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 912 }
 913
 914 void pm8001_dev_gone(struct domain_device *dev)
 915 {
 916         pm8001_dev_gone_notify(dev);
 917 }
 918
 919 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 920         u8 *lun, struct pm8001_tmf_task *tmf)
 921 {
 922         struct sas_ssp_task ssp_task;
 923         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 924                 return TMF_RESP_FUNC_ESUPP;
 925
 926         memcpy((u8 *)&ssp_task.LUN, lun, 8);
 927         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 928                 tmf);
 929 }
 930
 931 /* retry commands by ha, by task and/or by device */
 932 void pm8001_open_reject_retry(
 933         struct pm8001_hba_info *pm8001_ha,
 934         struct sas_task *task_to_close,
 935         struct pm8001_device *device_to_close)
 936 {
 937         int i;
 938         unsigned long flags;
 939
 940         if (pm8001_ha == NULL)
 941                 return;
 942
 943         spin_lock_irqsave(&pm8001_ha->lock, flags);
 944
 945         for (i = 0; i < PM8001_MAX_CCB; i++) {
 946                 struct sas_task *task;
 947                 struct task_status_struct *ts;
 948                 struct pm8001_device *pm8001_dev;
 949                 unsigned long flags1;
 950                 u32 tag;
 951                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 952
 953                 pm8001_dev = ccb->device;
 954                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 955                         continue;
 956                 if (!device_to_close) {
 957                         uintptr_t d = (uintptr_t)pm8001_dev
 958                                         - (uintptr_t)&pm8001_ha->devices;
 959                         if (((d % sizeof(*pm8001_dev)) != 0)
 960                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 961                                 continue;
 962                 } else if (pm8001_dev != device_to_close)
 963                         continue;
 964                 tag = ccb->ccb_tag;
 965                 if (!tag || (tag == 0xFFFFFFFF))
 966                         continue;
 967                 task = ccb->task;
 968                 if (!task || !task->task_done)
 969                         continue;
 970                 if (task_to_close && (task != task_to_close))
 971                         continue;
 972                 ts = &task->task_status;
 973                 ts->resp = SAS_TASK_COMPLETE;
 974                 /* Force the midlayer to retry */
 975                 ts->stat = SAS_OPEN_REJECT;
 976                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 977                 if (pm8001_dev)
 978                         atomic_dec(&pm8001_dev->running_req);
 979                 spin_lock_irqsave(&task->task_state_lock, flags1);
 980                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 981                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 982                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 983                 if (unlikely((task->task_state_flags
 984                                 & SAS_TASK_STATE_ABORTED))) {
 985                         spin_unlock_irqrestore(&task->task_state_lock,
 986                                 flags1);
 987                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 988                 } else {
 989                         spin_unlock_irqrestore(&task->task_state_lock,
 990                                 flags1);
 991                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 992                         mb();/* in order to force CPU ordering */
 993                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 994                         task->task_done(task);
 995                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 996                 }
 997         }
 998
 999         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
1000 }
1001
1002 /**
1003  * pm8001_I_T_nexus_reset() - reset the initiator/target connection
1004  * @dev: the device structure for the device to reset.
1005  *
1006  * Standard mandates link reset for ATA (type 0) and hard reset for
1007  * SSP (type 1), only for RECOVERY
1008  */
1009 int pm8001_I_T_nexus_reset(struct domain_device *dev)
1010 {
1011         int rc = TMF_RESP_FUNC_FAILED;
1012         struct pm8001_device *pm8001_dev;
1013         struct pm8001_hba_info *pm8001_ha;
1014         struct sas_phy *phy;
1015
1016         if (!dev || !dev->lldd_dev)
1017                 return -ENODEV;
1018
1019         pm8001_dev = dev->lldd_dev;
1020         pm8001_ha = pm8001_find_ha_by_dev(dev);
1021         phy = sas_get_local_phy(dev);
1022
1023         if (dev_is_sata(dev)) {
1024                 if (scsi_is_sas_phy_local(phy)) {
1025                         rc = 0;
1026                         goto out;
1027                 }
1028                 rc = sas_phy_reset(phy, 1);
1029                 if (rc) {
1030                         pm8001_dbg(pm8001_ha, EH,
1031                                    "phy reset failed for device %x\n"
1032                                    "with rc %d\n", pm8001_dev->device_id, rc);
1033                         rc = TMF_RESP_FUNC_FAILED;
1034                         goto out;
1035                 }
1036                 msleep(2000);
1037                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1038                                                      dev, 1, 0);
1039                 if (rc) {
1040                         pm8001_dbg(pm8001_ha, EH, "task abort failed %x\n"
1041                                    "with rc %d\n", pm8001_dev->device_id, rc);
1042                         rc = TMF_RESP_FUNC_FAILED;
1043                 }
1044         } else {
1045                 rc = sas_phy_reset(phy, 1);
1046                 msleep(2000);
1047         }
1048         pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
1049                    pm8001_dev->device_id, rc);
1050  out:
1051         sas_put_local_phy(phy);
1052         return rc;
1053 }
1054
1055 /*
1056 * This function handle the IT_NEXUS_XXX event or completion
1057 * status code for SSP/SATA/SMP I/O request.
1058 */
1059 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1060 {
1061         int rc = TMF_RESP_FUNC_FAILED;
1062         struct pm8001_device *pm8001_dev;
1063         struct pm8001_hba_info *pm8001_ha;
1064         struct sas_phy *phy;
1065
1066         if (!dev || !dev->lldd_dev)
1067                 return -1;
1068
1069         pm8001_dev = dev->lldd_dev;
1070         pm8001_ha = pm8001_find_ha_by_dev(dev);
1071
1072         pm8001_dbg(pm8001_ha, EH, "I_T_Nexus handler invoked !!\n");
1073
1074         phy = sas_get_local_phy(dev);
1075
1076         if (dev_is_sata(dev)) {
1077                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1078                 if (scsi_is_sas_phy_local(phy)) {
1079                         rc = 0;
1080                         goto out;
1081                 }
1082                 /* send internal ssp/sata/smp abort command to FW */
1083                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1084                                                      dev, 1, 0);
1085                 msleep(100);
1086
1087                 /* deregister the target device */
1088                 pm8001_dev_gone_notify(dev);
1089                 msleep(200);
1090
1091                 /*send phy reset to hard reset target */
1092                 rc = sas_phy_reset(phy, 1);
1093                 msleep(2000);
1094                 pm8001_dev->setds_completion = &completion_setstate;
1095
1096                 wait_for_completion(&completion_setstate);
1097         } else {
1098                 /* send internal ssp/sata/smp abort command to FW */
1099                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1100                                                      dev, 1, 0);
1101                 msleep(100);
1102
1103                 /* deregister the target device */
1104                 pm8001_dev_gone_notify(dev);
1105                 msleep(200);
1106
1107                 /*send phy reset to hard reset target */
1108                 rc = sas_phy_reset(phy, 1);
1109                 msleep(2000);
1110         }
1111         pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
1112                    pm8001_dev->device_id, rc);
1113 out:
1114         sas_put_local_phy(phy);
1115
1116         return rc;
1117 }
1118 /* mandatory SAM-3, the task reset the specified LUN*/
1119 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1120 {
1121         int rc = TMF_RESP_FUNC_FAILED;
1122         struct pm8001_tmf_task tmf_task;
1123         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1124         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1125         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1126         if (dev_is_sata(dev)) {
1127                 struct sas_phy *phy = sas_get_local_phy(dev);
1128                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1129                                                      dev, 1, 0);
1130                 rc = sas_phy_reset(phy, 1);
1131                 sas_put_local_phy(phy);
1132                 pm8001_dev->setds_completion = &completion_setstate;
1133                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1134                         pm8001_dev, DS_OPERATIONAL);
1135                 wait_for_completion(&completion_setstate);
1136         } else {
1137                 tmf_task.tmf = TMF_LU_RESET;
1138                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1139         }
1140         /* If failed, fall-through I_T_Nexus reset */
1141         pm8001_dbg(pm8001_ha, EH, "for device[%x]:rc=%d\n",
1142                    pm8001_dev->device_id, rc);
1143         return rc;
1144 }
1145
1146 /* optional SAM-3 */
1147 int pm8001_query_task(struct sas_task *task)
1148 {
1149         u32 tag = 0xdeadbeef;
1150         struct scsi_lun lun;
1151         struct pm8001_tmf_task tmf_task;
1152         int rc = TMF_RESP_FUNC_FAILED;
1153         if (unlikely(!task || !task->lldd_task || !task->dev))
1154                 return rc;
1155
1156         if (task->task_proto & SAS_PROTOCOL_SSP) {
1157                 struct scsi_cmnd *cmnd = task->uldd_task;
1158                 struct domain_device *dev = task->dev;
1159                 struct pm8001_hba_info *pm8001_ha =
1160                         pm8001_find_ha_by_dev(dev);
1161
1162                 int_to_scsilun(cmnd->device->lun, &lun);
1163                 rc = pm8001_find_tag(task, &tag);
1164                 if (rc == 0) {
1165                         rc = TMF_RESP_FUNC_FAILED;
1166                         return rc;
1167                 }
1168                 pm8001_dbg(pm8001_ha, EH, "Query:[%16ph]\n", cmnd->cmnd);
1169                 tmf_task.tmf =  TMF_QUERY_TASK;
1170                 tmf_task.tag_of_task_to_be_managed = tag;
1171
1172                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1173                 switch (rc) {
1174                 /* The task is still in Lun, release it then */
1175                 case TMF_RESP_FUNC_SUCC:
1176                         pm8001_dbg(pm8001_ha, EH,
1177                                    "The task is still in Lun\n");
1178                         break;
1179                 /* The task is not in Lun or failed, reset the phy */
1180                 case TMF_RESP_FUNC_FAILED:
1181                 case TMF_RESP_FUNC_COMPLETE:
1182                         pm8001_dbg(pm8001_ha, EH,
1183                                    "The task is not in Lun or failed, reset the phy\n");
1184                         break;
1185                 }
1186         }
1187         pr_err("pm80xx: rc= %d\n", rc);
1188         return rc;
1189 }
1190
1191 /*  mandatory SAM-3, still need free task/ccb info, abort the specified task */
1192 int pm8001_abort_task(struct sas_task *task)
1193 {
1194         unsigned long flags;
1195         u32 tag;
1196         struct domain_device *dev ;
1197         struct pm8001_hba_info *pm8001_ha;
1198         struct scsi_lun lun;
1199         struct pm8001_device *pm8001_dev;
1200         struct pm8001_tmf_task tmf_task;
1201         int rc = TMF_RESP_FUNC_FAILED, ret;
1202         u32 phy_id, port_id;
1203         struct sas_task_slow slow_task;
1204
1205         if (unlikely(!task || !task->lldd_task || !task->dev))
1206                 return TMF_RESP_FUNC_FAILED;
1207
1208         dev = task->dev;
1209         pm8001_dev = dev->lldd_dev;
1210         pm8001_ha = pm8001_find_ha_by_dev(dev);
1211         phy_id = pm8001_dev->attached_phy;
1212
1213         if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
1214                 // If the controller is seeing fatal errors
1215                 // abort task will not get a response from the controller
1216                 return TMF_RESP_FUNC_FAILED;
1217         }
1218
1219         ret = pm8001_find_tag(task, &tag);
1220         if (ret == 0) {
1221                 pm8001_info(pm8001_ha, "no tag for task:%p\n", task);
1222                 return TMF_RESP_FUNC_FAILED;
1223         }
1224         spin_lock_irqsave(&task->task_state_lock, flags);
1225         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1226                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1227                 return TMF_RESP_FUNC_COMPLETE;
1228         }
1229         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1230         if (task->slow_task == NULL) {
1231                 init_completion(&slow_task.completion);
1232                 task->slow_task = &slow_task;
1233         }
1234         spin_unlock_irqrestore(&task->task_state_lock, flags);
1235         if (task->task_proto & SAS_PROTOCOL_SSP) {
1236                 struct scsi_cmnd *cmnd = task->uldd_task;
1237                 int_to_scsilun(cmnd->device->lun, &lun);
1238                 tmf_task.tmf = TMF_ABORT_TASK;
1239                 tmf_task.tag_of_task_to_be_managed = tag;
1240                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1241                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1242                         pm8001_dev->sas_device, 0, tag);
1243         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1244                 task->task_proto & SAS_PROTOCOL_STP) {
1245                 if (pm8001_ha->chip_id == chip_8006) {
1246                         DECLARE_COMPLETION_ONSTACK(completion_reset);
1247                         DECLARE_COMPLETION_ONSTACK(completion);
1248                         struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1249                         port_id = phy->port->port_id;
1250
1251                         /* 1. Set Device state as Recovery */
1252                         pm8001_dev->setds_completion = &completion;
1253                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1254                                 pm8001_dev, DS_IN_RECOVERY);
1255                         wait_for_completion(&completion);
1256
1257                         /* 2. Send Phy Control Hard Reset */
1258                         reinit_completion(&completion);
1259                         phy->port_reset_status = PORT_RESET_TMO;
1260                         phy->reset_success = false;
1261                         phy->enable_completion = &completion;
1262                         phy->reset_completion = &completion_reset;
1263                         ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1264                                 PHY_HARD_RESET);
1265                         if (ret) {
1266                                 phy->enable_completion = NULL;
1267                                 phy->reset_completion = NULL;
1268                                 goto out;
1269                         }
1270
1271                         /* In the case of the reset timeout/fail we still
1272                          * abort the command at the firmware. The assumption
1273                          * here is that the drive is off doing something so
1274                          * that it's not processing requests, and we want to
1275                          * avoid getting a completion for this and either
1276                          * leaking the task in libsas or losing the race and
1277                          * getting a double free.
1278                          */
1279                         pm8001_dbg(pm8001_ha, MSG,
1280                                    "Waiting for local phy ctl\n");
1281                         ret = wait_for_completion_timeout(&completion,
1282                                         PM8001_TASK_TIMEOUT * HZ);
1283                         if (!ret || !phy->reset_success) {
1284                                 phy->enable_completion = NULL;
1285                                 phy->reset_completion = NULL;
1286                         } else {
1287                                 /* 3. Wait for Port Reset complete or
1288                                  * Port reset TMO
1289                                  */
1290                                 pm8001_dbg(pm8001_ha, MSG,
1291                                            "Waiting for Port reset\n");
1292                                 ret = wait_for_completion_timeout(
1293                                         &completion_reset,
1294                                         PM8001_TASK_TIMEOUT * HZ);
1295                                 if (!ret)
1296                                         phy->reset_completion = NULL;
1297                                 WARN_ON(phy->port_reset_status ==
1298                                                 PORT_RESET_TMO);
1299                                 if (phy->port_reset_status == PORT_RESET_TMO) {
1300                                         pm8001_dev_gone_notify(dev);
1301                                         PM8001_CHIP_DISP->hw_event_ack_req(
1302                                                 pm8001_ha, 0,
1303                                                 0x07, /*HW_EVENT_PHY_DOWN ack*/
1304                                                 port_id, phy_id, 0, 0);
1305                                         goto out;
1306                                 }
1307                         }
1308
1309                         /*
1310                          * 4. SATA Abort ALL
1311                          * we wait for the task to be aborted so that the task
1312                          * is removed from the ccb. on success the caller is
1313                          * going to free the task.
1314                          */
1315                         ret = pm8001_exec_internal_task_abort(pm8001_ha,
1316                                 pm8001_dev, pm8001_dev->sas_device, 1, tag);
1317                         if (ret)
1318                                 goto out;
1319                         ret = wait_for_completion_timeout(
1320                                 &task->slow_task->completion,
1321                                 PM8001_TASK_TIMEOUT * HZ);
1322                         if (!ret)
1323                                 goto out;
1324
1325                         /* 5. Set Device State as Operational */
1326                         reinit_completion(&completion);
1327                         pm8001_dev->setds_completion = &completion;
1328                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1329                                 pm8001_dev, DS_OPERATIONAL);
1330                         wait_for_completion(&completion);
1331                 } else {
1332                         rc = pm8001_exec_internal_task_abort(pm8001_ha,
1333                                 pm8001_dev, pm8001_dev->sas_device, 0, tag);
1334                 }
1335                 rc = TMF_RESP_FUNC_COMPLETE;
1336         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1337                 /* SMP */
1338                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1339                         pm8001_dev->sas_device, 0, tag);
1340
1341         }
1342 out:
1343         spin_lock_irqsave(&task->task_state_lock, flags);
1344         if (task->slow_task == &slow_task)
1345                 task->slow_task = NULL;
1346         spin_unlock_irqrestore(&task->task_state_lock, flags);
1347         if (rc != TMF_RESP_FUNC_COMPLETE)
1348                 pm8001_info(pm8001_ha, "rc= %d\n", rc);
1349         return rc;
1350 }
1351
1352 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1353 {
1354         struct pm8001_tmf_task tmf_task;
1355
1356         tmf_task.tmf = TMF_ABORT_TASK_SET;
1357         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1358 }
1359
1360 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1361 {
1362         struct pm8001_tmf_task tmf_task;
1363
1364         tmf_task.tmf = TMF_CLEAR_ACA;
1365         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1366 }
1367
1368 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1369 {
1370         struct pm8001_tmf_task tmf_task;
1371         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1372         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1373
1374         pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",
1375                    pm8001_dev->device_id);
1376         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1377         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1378 }
1379
1380 void pm8001_port_formed(struct asd_sas_phy *sas_phy)
1381 {
1382         struct sas_ha_struct *sas_ha = sas_phy->ha;
1383         struct pm8001_hba_info *pm8001_ha = sas_ha->lldd_ha;
1384         struct pm8001_phy *phy = sas_phy->lldd_phy;
1385         struct asd_sas_port *sas_port = sas_phy->port;
1386         struct pm8001_port *port = phy->port;
1387
1388         if (!sas_port) {
1389                 pm8001_dbg(pm8001_ha, FAIL, "Received null port\n");
1390                 return;
1391         }
1392         sas_port->lldd_port = port;
1393 }