drivers/scsi/pm8001/pm8001_sas.c

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