kernel/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 = pci_zalloc_consistent(pdev, mem_size + align,
 120                                                &mem_dma_handle);
 121         if (!mem_virt_alloc) {
 122                 pm8001_printk("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   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 134   * find out our hba struct.
 135   * @dev: the domain device which from sas layer.
 136   */
 137 static
 138 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 139 {
 140         struct sas_ha_struct *sha = dev->port->ha;
 141         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 142         return pm8001_ha;
 143 }
 144
 145 /**
 146   * pm8001_phy_control - this function should be registered to
 147   * sas_domain_function_template to provide libsas used, note: this is just
 148   * control the HBA phy rather than other expander phy if you want control
 149   * other phy, you should use SMP command.
 150   * @sas_phy: which phy in HBA phys.
 151   * @func: the operation.
 152   * @funcdata: always NULL.
 153   */
 154 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 155         void *funcdata)
 156 {
 157         int rc = 0, phy_id = sas_phy->id;
 158         struct pm8001_hba_info *pm8001_ha = NULL;
 159         struct sas_phy_linkrates *rates;
 160         DECLARE_COMPLETION_ONSTACK(completion);
 161         unsigned long flags;
 162         pm8001_ha = sas_phy->ha->lldd_ha;
 163         pm8001_ha->phy[phy_id].enable_completion = &completion;
 164         switch (func) {
 165         case PHY_FUNC_SET_LINK_RATE:
 166                 rates = funcdata;
 167                 if (rates->minimum_linkrate) {
 168                         pm8001_ha->phy[phy_id].minimum_linkrate =
 169                                 rates->minimum_linkrate;
 170                 }
 171                 if (rates->maximum_linkrate) {
 172                         pm8001_ha->phy[phy_id].maximum_linkrate =
 173                                 rates->maximum_linkrate;
 174                 }
 175                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 176                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 177                         wait_for_completion(&completion);
 178                 }
 179                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 180                                               PHY_LINK_RESET);
 181                 break;
 182         case PHY_FUNC_HARD_RESET:
 183                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 184                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 185                         wait_for_completion(&completion);
 186                 }
 187                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 188                                               PHY_HARD_RESET);
 189                 break;
 190         case PHY_FUNC_LINK_RESET:
 191                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 192                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 193                         wait_for_completion(&completion);
 194                 }
 195                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 196                                               PHY_LINK_RESET);
 197                 break;
 198         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 199                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 200                                               PHY_LINK_RESET);
 201                 break;
 202         case PHY_FUNC_DISABLE:
 203                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 204                 break;
 205         case PHY_FUNC_GET_EVENTS:
 206                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 207                 if (pm8001_ha->chip_id == chip_8001) {
 208                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 209                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 210                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 211                                 return -EINVAL;
 212                         }
 213                 }
 214                 {
 215                         struct sas_phy *phy = sas_phy->phy;
 216                         uint32_t *qp = (uint32_t *)(((char *)
 217                                 pm8001_ha->io_mem[2].memvirtaddr)
 218                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 219
 220                         phy->invalid_dword_count = qp[0];
 221                         phy->running_disparity_error_count = qp[1];
 222                         phy->loss_of_dword_sync_count = qp[3];
 223                         phy->phy_reset_problem_count = qp[4];
 224                 }
 225                 if (pm8001_ha->chip_id == chip_8001)
 226                         pm8001_bar4_shift(pm8001_ha, 0);
 227                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 228                 return 0;
 229         default:
 230                 rc = -EOPNOTSUPP;
 231         }
 232         msleep(300);
 233         return rc;
 234 }
 235
 236 /**
 237   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 238   * command to HBA.
 239   * @shost: the scsi host data.
 240   */
 241 void pm8001_scan_start(struct Scsi_Host *shost)
 242 {
 243         int i;
 244         struct pm8001_hba_info *pm8001_ha;
 245         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 246         pm8001_ha = sha->lldd_ha;
 247         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 248         if (pm8001_ha->chip_id == chip_8001)
 249                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 250         for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
 251                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 252 }
 253
 254 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 255 {
 256         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 257
 258         /* give the phy enabling interrupt event time to come in (1s
 259         * is empirically about all it takes) */
 260         if (time < HZ)
 261                 return 0;
 262         /* Wait for discovery to finish */
 263         sas_drain_work(ha);
 264         return 1;
 265 }
 266
 267 /**
 268   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 269   * @pm8001_ha: our hba card information
 270   * @ccb: the ccb which attached to smp task
 271   */
 272 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 273         struct pm8001_ccb_info *ccb)
 274 {
 275         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 276 }
 277
 278 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 279 {
 280         struct ata_queued_cmd *qc = task->uldd_task;
 281         if (qc) {
 282                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 283                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 284                         *tag = qc->tag;
 285                         return 1;
 286                 }
 287         }
 288         return 0;
 289 }
 290
 291 /**
 292   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 293   * @pm8001_ha: our hba card information
 294   * @ccb: the ccb which attached to sata task
 295   */
 296 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 297         struct pm8001_ccb_info *ccb)
 298 {
 299         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 300 }
 301
 302 /**
 303   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 304   * @pm8001_ha: our hba card information
 305   * @ccb: the ccb which attached to TM
 306   * @tmf: the task management IU
 307   */
 308 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 309         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 310 {
 311         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 312 }
 313
 314 /**
 315   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 316   * @pm8001_ha: our hba card information
 317   * @ccb: the ccb which attached to ssp task
 318   */
 319 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 320         struct pm8001_ccb_info *ccb)
 321 {
 322         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 323 }
 324
 325  /* Find the local port id that's attached to this device */
 326 static int sas_find_local_port_id(struct domain_device *dev)
 327 {
 328         struct domain_device *pdev = dev->parent;
 329
 330         /* Directly attached device */
 331         if (!pdev)
 332                 return dev->port->id;
 333         while (pdev) {
 334                 struct domain_device *pdev_p = pdev->parent;
 335                 if (!pdev_p)
 336                         return pdev->port->id;
 337                 pdev = pdev->parent;
 338         }
 339         return 0;
 340 }
 341
 342 /**
 343   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 344   * @task: the task to be execute.
 345   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 346   * we always execute one one time.
 347   * @gfp_flags: gfp_flags.
 348   * @is_tmf: if it is task management task.
 349   * @tmf: the task management IU
 350   */
 351 #define DEV_IS_GONE(pm8001_dev) \
 352         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 353 static int pm8001_task_exec(struct sas_task *task,
 354         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 355 {
 356         struct domain_device *dev = task->dev;
 357         struct pm8001_hba_info *pm8001_ha;
 358         struct pm8001_device *pm8001_dev;
 359         struct pm8001_port *port = NULL;
 360         struct sas_task *t = task;
 361         struct pm8001_ccb_info *ccb;
 362         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 363         unsigned long flags = 0;
 364
 365         if (!dev->port) {
 366                 struct task_status_struct *tsm = &t->task_status;
 367                 tsm->resp = SAS_TASK_UNDELIVERED;
 368                 tsm->stat = SAS_PHY_DOWN;
 369                 if (dev->dev_type != SAS_SATA_DEV)
 370                         t->task_done(t);
 371                 return 0;
 372         }
 373         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 374         PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 375         spin_lock_irqsave(&pm8001_ha->lock, flags);
 376         do {
 377                 dev = t->dev;
 378                 pm8001_dev = dev->lldd_dev;
 379                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 380                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 381                         if (sas_protocol_ata(t->task_proto)) {
 382                                 struct task_status_struct *ts = &t->task_status;
 383                                 ts->resp = SAS_TASK_UNDELIVERED;
 384                                 ts->stat = SAS_PHY_DOWN;
 385
 386                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 387                                 t->task_done(t);
 388                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 389                                 continue;
 390                         } else {
 391                                 struct task_status_struct *ts = &t->task_status;
 392                                 ts->resp = SAS_TASK_UNDELIVERED;
 393                                 ts->stat = SAS_PHY_DOWN;
 394                                 t->task_done(t);
 395                                 continue;
 396                         }
 397                 }
 398                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 399                 if (rc)
 400                         goto err_out;
 401                 ccb = &pm8001_ha->ccb_info[tag];
 402
 403                 if (!sas_protocol_ata(t->task_proto)) {
 404                         if (t->num_scatter) {
 405                                 n_elem = dma_map_sg(pm8001_ha->dev,
 406                                         t->scatter,
 407                                         t->num_scatter,
 408                                         t->data_dir);
 409                                 if (!n_elem) {
 410                                         rc = -ENOMEM;
 411                                         goto err_out_tag;
 412                                 }
 413                         }
 414                 } else {
 415                         n_elem = t->num_scatter;
 416                 }
 417
 418                 t->lldd_task = ccb;
 419                 ccb->n_elem = n_elem;
 420                 ccb->ccb_tag = tag;
 421                 ccb->task = t;
 422                 ccb->device = pm8001_dev;
 423                 switch (t->task_proto) {
 424                 case SAS_PROTOCOL_SMP:
 425                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 426                         break;
 427                 case SAS_PROTOCOL_SSP:
 428                         if (is_tmf)
 429                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 430                                         ccb, tmf);
 431                         else
 432                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 433                         break;
 434                 case SAS_PROTOCOL_SATA:
 435                 case SAS_PROTOCOL_STP:
 436                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 437                         break;
 438                 default:
 439                         dev_printk(KERN_ERR, pm8001_ha->dev,
 440                                 "unknown sas_task proto: 0x%x\n",
 441                                 t->task_proto);
 442                         rc = -EINVAL;
 443                         break;
 444                 }
 445
 446                 if (rc) {
 447                         PM8001_IO_DBG(pm8001_ha,
 448                                 pm8001_printk("rc is %x\n", rc));
 449                         goto err_out_tag;
 450                 }
 451                 /* TODO: select normal or high priority */
 452                 spin_lock(&t->task_state_lock);
 453                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 454                 spin_unlock(&t->task_state_lock);
 455                 pm8001_dev->running_req++;
 456         } while (0);
 457         rc = 0;
 458         goto out_done;
 459
 460 err_out_tag:
 461         pm8001_tag_free(pm8001_ha, tag);
 462 err_out:
 463         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 464         if (!sas_protocol_ata(t->task_proto))
 465                 if (n_elem)
 466                         dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem,
 467                                 t->data_dir);
 468 out_done:
 469         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 470         return rc;
 471 }
 472
 473 /**
 474   * pm8001_queue_command - register for upper layer used, all IO commands sent
 475   * to HBA are from this interface.
 476   * @task: the task to be execute.
 477   * @gfp_flags: gfp_flags
 478   */
 479 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 480 {
 481         return pm8001_task_exec(task, gfp_flags, 0, NULL);
 482 }
 483
 484 /**
 485   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 486   * @pm8001_ha: our hba card information
 487   * @ccb: the ccb which attached to ssp task
 488   * @task: the task to be free.
 489   * @ccb_idx: ccb index.
 490   */
 491 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 492         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 493 {
 494         if (!ccb->task)
 495                 return;
 496         if (!sas_protocol_ata(task->task_proto))
 497                 if (ccb->n_elem)
 498                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 499                                 task->num_scatter, task->data_dir);
 500
 501         switch (task->task_proto) {
 502         case SAS_PROTOCOL_SMP:
 503                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 504                         PCI_DMA_FROMDEVICE);
 505                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 506                         PCI_DMA_TODEVICE);
 507                 break;
 508
 509         case SAS_PROTOCOL_SATA:
 510         case SAS_PROTOCOL_STP:
 511         case SAS_PROTOCOL_SSP:
 512         default:
 513                 /* do nothing */
 514                 break;
 515         }
 516         task->lldd_task = NULL;
 517         ccb->task = NULL;
 518         ccb->ccb_tag = 0xFFFFFFFF;
 519         ccb->open_retry = 0;
 520         pm8001_tag_free(pm8001_ha, ccb_idx);
 521 }
 522
 523  /**
 524   * pm8001_alloc_dev - find a empty pm8001_device
 525   * @pm8001_ha: our hba card information
 526   */
 527 struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 528 {
 529         u32 dev;
 530         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 531                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 532                         pm8001_ha->devices[dev].id = dev;
 533                         return &pm8001_ha->devices[dev];
 534                 }
 535         }
 536         if (dev == PM8001_MAX_DEVICES) {
 537                 PM8001_FAIL_DBG(pm8001_ha,
 538                         pm8001_printk("max support %d devices, ignore ..\n",
 539                         PM8001_MAX_DEVICES));
 540         }
 541         return NULL;
 542 }
 543 /**
 544   * pm8001_find_dev - find a matching pm8001_device
 545   * @pm8001_ha: our hba card information
 546   */
 547 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 548                                         u32 device_id)
 549 {
 550         u32 dev;
 551         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 552                 if (pm8001_ha->devices[dev].device_id == device_id)
 553                         return &pm8001_ha->devices[dev];
 554         }
 555         if (dev == PM8001_MAX_DEVICES) {
 556                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 557                                 "DEVICE FOUND !!!\n"));
 558         }
 559         return NULL;
 560 }
 561
 562 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 563 {
 564         u32 id = pm8001_dev->id;
 565         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 566         pm8001_dev->id = id;
 567         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 568         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 569         pm8001_dev->sas_device = NULL;
 570 }
 571
 572 /**
 573   * pm8001_dev_found_notify - libsas notify a device is found.
 574   * @dev: the device structure which sas layer used.
 575   *
 576   * when libsas find a sas domain device, it should tell the LLDD that
 577   * device is found, and then LLDD register this device to HBA firmware
 578   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 579   * device ID(according to device's sas address) and returned it to LLDD. From
 580   * now on, we communicate with HBA FW with the device ID which HBA assigned
 581   * rather than sas address. it is the necessary step for our HBA but it is
 582   * the optional for other HBA driver.
 583   */
 584 static int pm8001_dev_found_notify(struct domain_device *dev)
 585 {
 586         unsigned long flags = 0;
 587         int res = 0;
 588         struct pm8001_hba_info *pm8001_ha = NULL;
 589         struct domain_device *parent_dev = dev->parent;
 590         struct pm8001_device *pm8001_device;
 591         DECLARE_COMPLETION_ONSTACK(completion);
 592         u32 flag = 0;
 593         pm8001_ha = pm8001_find_ha_by_dev(dev);
 594         spin_lock_irqsave(&pm8001_ha->lock, flags);
 595
 596         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 597         if (!pm8001_device) {
 598                 res = -1;
 599                 goto found_out;
 600         }
 601         pm8001_device->sas_device = dev;
 602         dev->lldd_dev = pm8001_device;
 603         pm8001_device->dev_type = dev->dev_type;
 604         pm8001_device->dcompletion = &completion;
 605         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 606                 int phy_id;
 607                 struct ex_phy *phy;
 608                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 609                 phy_id++) {
 610                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 611                         if (SAS_ADDR(phy->attached_sas_addr)
 612                                 == SAS_ADDR(dev->sas_addr)) {
 613                                 pm8001_device->attached_phy = phy_id;
 614                                 break;
 615                         }
 616                 }
 617                 if (phy_id == parent_dev->ex_dev.num_phys) {
 618                         PM8001_FAIL_DBG(pm8001_ha,
 619                         pm8001_printk("Error: no attached dev:%016llx"
 620                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 621                                 SAS_ADDR(parent_dev->sas_addr)));
 622                         res = -1;
 623                 }
 624         } else {
 625                 if (dev->dev_type == SAS_SATA_DEV) {
 626                         pm8001_device->attached_phy =
 627                                 dev->rphy->identify.phy_identifier;
 628                                 flag = 1; /* directly sata*/
 629                 }
 630         } /*register this device to HBA*/
 631         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 632         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 633         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 634         wait_for_completion(&completion);
 635         if (dev->dev_type == SAS_END_DEVICE)
 636                 msleep(50);
 637         pm8001_ha->flags = PM8001F_RUN_TIME;
 638         return 0;
 639 found_out:
 640         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 641         return res;
 642 }
 643
 644 int pm8001_dev_found(struct domain_device *dev)
 645 {
 646         return pm8001_dev_found_notify(dev);
 647 }
 648
 649 void pm8001_task_done(struct sas_task *task)
 650 {
 651         if (!del_timer(&task->slow_task->timer))
 652                 return;
 653         complete(&task->slow_task->completion);
 654 }
 655
 656 static void pm8001_tmf_timedout(unsigned long data)
 657 {
 658         struct sas_task *task = (struct sas_task *)data;
 659
 660         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 661         complete(&task->slow_task->completion);
 662 }
 663
 664 #define PM8001_TASK_TIMEOUT 20
 665 /**
 666   * pm8001_exec_internal_tmf_task - execute some task management commands.
 667   * @dev: the wanted device.
 668   * @tmf: which task management wanted to be take.
 669   * @para_len: para_len.
 670   * @parameter: ssp task parameter.
 671   *
 672   * when errors or exception happened, we may want to do something, for example
 673   * abort the issued task which result in this execption, it is done by calling
 674   * this function, note it is also with the task execute interface.
 675   */
 676 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 677         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 678 {
 679         int res, retry;
 680         struct sas_task *task = NULL;
 681         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 682         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 683         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 684
 685         for (retry = 0; retry < 3; retry++) {
 686                 task = sas_alloc_slow_task(GFP_KERNEL);
 687                 if (!task)
 688                         return -ENOMEM;
 689
 690                 task->dev = dev;
 691                 task->task_proto = dev->tproto;
 692                 memcpy(&task->ssp_task, parameter, para_len);
 693                 task->task_done = pm8001_task_done;
 694                 task->slow_task->timer.data = (unsigned long)task;
 695                 task->slow_task->timer.function = pm8001_tmf_timedout;
 696                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 697                 add_timer(&task->slow_task->timer);
 698
 699                 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 700
 701                 if (res) {
 702                         del_timer(&task->slow_task->timer);
 703                         PM8001_FAIL_DBG(pm8001_ha,
 704                                 pm8001_printk("Executing internal task "
 705                                 "failed\n"));
 706                         goto ex_err;
 707                 }
 708                 wait_for_completion(&task->slow_task->completion);
 709                 if (pm8001_ha->chip_id != chip_8001) {
 710                         pm8001_dev->setds_completion = &completion_setstate;
 711                                 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 712                                         pm8001_dev, 0x01);
 713                         wait_for_completion(&completion_setstate);
 714                 }
 715                 res = -TMF_RESP_FUNC_FAILED;
 716                 /* Even TMF timed out, return direct. */
 717                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 718                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 719                                 PM8001_FAIL_DBG(pm8001_ha,
 720                                         pm8001_printk("TMF task[%x]timeout.\n",
 721                                         tmf->tmf));
 722                                 goto ex_err;
 723                         }
 724                 }
 725
 726                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 727                         task->task_status.stat == SAM_STAT_GOOD) {
 728                         res = TMF_RESP_FUNC_COMPLETE;
 729                         break;
 730                 }
 731
 732                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 733                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 734                         /* no error, but return the number of bytes of
 735                         * underrun */
 736                         res = task->task_status.residual;
 737                         break;
 738                 }
 739
 740                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 741                         task->task_status.stat == SAS_DATA_OVERRUN) {
 742                         PM8001_FAIL_DBG(pm8001_ha,
 743                                 pm8001_printk("Blocked task error.\n"));
 744                         res = -EMSGSIZE;
 745                         break;
 746                 } else {
 747                         PM8001_EH_DBG(pm8001_ha,
 748                                 pm8001_printk(" Task to dev %016llx response:"
 749                                 "0x%x status 0x%x\n",
 750                                 SAS_ADDR(dev->sas_addr),
 751                                 task->task_status.resp,
 752                                 task->task_status.stat));
 753                         sas_free_task(task);
 754                         task = NULL;
 755                 }
 756         }
 757 ex_err:
 758         BUG_ON(retry == 3 && task != NULL);
 759         sas_free_task(task);
 760         return res;
 761 }
 762
 763 static int
 764 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 765         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 766         u32 task_tag)
 767 {
 768         int res, retry;
 769         u32 ccb_tag;
 770         struct pm8001_ccb_info *ccb;
 771         struct sas_task *task = NULL;
 772
 773         for (retry = 0; retry < 3; retry++) {
 774                 task = sas_alloc_slow_task(GFP_KERNEL);
 775                 if (!task)
 776                         return -ENOMEM;
 777
 778                 task->dev = dev;
 779                 task->task_proto = dev->tproto;
 780                 task->task_done = pm8001_task_done;
 781                 task->slow_task->timer.data = (unsigned long)task;
 782                 task->slow_task->timer.function = pm8001_tmf_timedout;
 783                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 784                 add_timer(&task->slow_task->timer);
 785
 786                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 787                 if (res)
 788                         return res;
 789                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 790                 ccb->device = pm8001_dev;
 791                 ccb->ccb_tag = ccb_tag;
 792                 ccb->task = task;
 793                 ccb->n_elem = 0;
 794
 795                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 796                         pm8001_dev, flag, task_tag, ccb_tag);
 797
 798                 if (res) {
 799                         del_timer(&task->slow_task->timer);
 800                         PM8001_FAIL_DBG(pm8001_ha,
 801                                 pm8001_printk("Executing internal task "
 802                                 "failed\n"));
 803                         goto ex_err;
 804                 }
 805                 wait_for_completion(&task->slow_task->completion);
 806                 res = TMF_RESP_FUNC_FAILED;
 807                 /* Even TMF timed out, return direct. */
 808                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 809                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 810                                 PM8001_FAIL_DBG(pm8001_ha,
 811                                         pm8001_printk("TMF task timeout.\n"));
 812                                 goto ex_err;
 813                         }
 814                 }
 815
 816                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 817                         task->task_status.stat == SAM_STAT_GOOD) {
 818                         res = TMF_RESP_FUNC_COMPLETE;
 819                         break;
 820
 821                 } else {
 822                         PM8001_EH_DBG(pm8001_ha,
 823                                 pm8001_printk(" Task to dev %016llx response: "
 824                                         "0x%x status 0x%x\n",
 825                                 SAS_ADDR(dev->sas_addr),
 826                                 task->task_status.resp,
 827                                 task->task_status.stat));
 828                         sas_free_task(task);
 829                         task = NULL;
 830                 }
 831         }
 832 ex_err:
 833         BUG_ON(retry == 3 && task != NULL);
 834         sas_free_task(task);
 835         return res;
 836 }
 837
 838 /**
 839   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 840   * @dev: the device structure which sas layer used.
 841   */
 842 static void pm8001_dev_gone_notify(struct domain_device *dev)
 843 {
 844         unsigned long flags = 0;
 845         struct pm8001_hba_info *pm8001_ha;
 846         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 847
 848         pm8001_ha = pm8001_find_ha_by_dev(dev);
 849         spin_lock_irqsave(&pm8001_ha->lock, flags);
 850         if (pm8001_dev) {
 851                 u32 device_id = pm8001_dev->device_id;
 852
 853                 PM8001_DISC_DBG(pm8001_ha,
 854                         pm8001_printk("found dev[%d:%x] is gone.\n",
 855                         pm8001_dev->device_id, pm8001_dev->dev_type));
 856                 if (pm8001_dev->running_req) {
 857                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 858                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 859                                 dev, 1, 0);
 860                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 861                 }
 862                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 863                 pm8001_free_dev(pm8001_dev);
 864         } else {
 865                 PM8001_DISC_DBG(pm8001_ha,
 866                         pm8001_printk("Found dev has gone.\n"));
 867         }
 868         dev->lldd_dev = NULL;
 869         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 870 }
 871
 872 void pm8001_dev_gone(struct domain_device *dev)
 873 {
 874         pm8001_dev_gone_notify(dev);
 875 }
 876
 877 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 878         u8 *lun, struct pm8001_tmf_task *tmf)
 879 {
 880         struct sas_ssp_task ssp_task;
 881         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 882                 return TMF_RESP_FUNC_ESUPP;
 883
 884         strncpy((u8 *)&ssp_task.LUN, lun, 8);
 885         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 886                 tmf);
 887 }
 888
 889 /* retry commands by ha, by task and/or by device */
 890 void pm8001_open_reject_retry(
 891         struct pm8001_hba_info *pm8001_ha,
 892         struct sas_task *task_to_close,
 893         struct pm8001_device *device_to_close)
 894 {
 895         int i;
 896         unsigned long flags;
 897
 898         if (pm8001_ha == NULL)
 899                 return;
 900
 901         spin_lock_irqsave(&pm8001_ha->lock, flags);
 902
 903         for (i = 0; i < PM8001_MAX_CCB; i++) {
 904                 struct sas_task *task;
 905                 struct task_status_struct *ts;
 906                 struct pm8001_device *pm8001_dev;
 907                 unsigned long flags1;
 908                 u32 tag;
 909                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 910
 911                 pm8001_dev = ccb->device;
 912                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 913                         continue;
 914                 if (!device_to_close) {
 915                         uintptr_t d = (uintptr_t)pm8001_dev
 916                                         - (uintptr_t)&pm8001_ha->devices;
 917                         if (((d % sizeof(*pm8001_dev)) != 0)
 918                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 919                                 continue;
 920                 } else if (pm8001_dev != device_to_close)
 921                         continue;
 922                 tag = ccb->ccb_tag;
 923                 if (!tag || (tag == 0xFFFFFFFF))
 924                         continue;
 925                 task = ccb->task;
 926                 if (!task || !task->task_done)
 927                         continue;
 928                 if (task_to_close && (task != task_to_close))
 929                         continue;
 930                 ts = &task->task_status;
 931                 ts->resp = SAS_TASK_COMPLETE;
 932                 /* Force the midlayer to retry */
 933                 ts->stat = SAS_OPEN_REJECT;
 934                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 935                 if (pm8001_dev)
 936                         pm8001_dev->running_req--;
 937                 spin_lock_irqsave(&task->task_state_lock, flags1);
 938                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 939                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 940                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 941                 if (unlikely((task->task_state_flags
 942                                 & SAS_TASK_STATE_ABORTED))) {
 943                         spin_unlock_irqrestore(&task->task_state_lock,
 944                                 flags1);
 945                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 946                 } else {
 947                         spin_unlock_irqrestore(&task->task_state_lock,
 948                                 flags1);
 949                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 950                         mb();/* in order to force CPU ordering */
 951                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 952                         task->task_done(task);
 953                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 954                 }
 955         }
 956
 957         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 958 }
 959
 960 /**
 961   * Standard mandates link reset for ATA  (type 0) and hard reset for
 962   * SSP (type 1) , only for RECOVERY
 963   */
 964 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 965 {
 966         int rc = TMF_RESP_FUNC_FAILED;
 967         struct pm8001_device *pm8001_dev;
 968         struct pm8001_hba_info *pm8001_ha;
 969         struct sas_phy *phy;
 970
 971         if (!dev || !dev->lldd_dev)
 972                 return -ENODEV;
 973
 974         pm8001_dev = dev->lldd_dev;
 975         pm8001_ha = pm8001_find_ha_by_dev(dev);
 976         phy = sas_get_local_phy(dev);
 977
 978         if (dev_is_sata(dev)) {
 979                 if (scsi_is_sas_phy_local(phy)) {
 980                         rc = 0;
 981                         goto out;
 982                 }
 983                 rc = sas_phy_reset(phy, 1);
 984                 if (rc) {
 985                         PM8001_EH_DBG(pm8001_ha,
 986                         pm8001_printk("phy reset failed for device %x\n"
 987                         "with rc %d\n", pm8001_dev->device_id, rc));
 988                         rc = TMF_RESP_FUNC_FAILED;
 989                         goto out;
 990                 }
 991                 msleep(2000);
 992                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 993                         dev, 1, 0);
 994                 if (rc) {
 995                         PM8001_EH_DBG(pm8001_ha,
 996                         pm8001_printk("task abort failed %x\n"
 997                         "with rc %d\n", pm8001_dev->device_id, rc));
 998                         rc = TMF_RESP_FUNC_FAILED;
 999                 }
1000         } else {
1001                 rc = sas_phy_reset(phy, 1);
1002                 msleep(2000);
1003         }
1004         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1005                 pm8001_dev->device_id, rc));
1006  out:
1007         sas_put_local_phy(phy);
1008         return rc;
1009 }
1010
1011 /*
1012 * This function handle the IT_NEXUS_XXX event or completion
1013 * status code for SSP/SATA/SMP I/O request.
1014 */
1015 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1016 {
1017         int rc = TMF_RESP_FUNC_FAILED;
1018         struct pm8001_device *pm8001_dev;
1019         struct pm8001_hba_info *pm8001_ha;
1020         struct sas_phy *phy;
1021         u32 device_id = 0;
1022
1023         if (!dev || !dev->lldd_dev)
1024                 return -1;
1025
1026         pm8001_dev = dev->lldd_dev;
1027         device_id = pm8001_dev->device_id;
1028         pm8001_ha = pm8001_find_ha_by_dev(dev);
1029
1030         PM8001_EH_DBG(pm8001_ha,
1031                         pm8001_printk("I_T_Nexus handler invoked !!"));
1032
1033         phy = sas_get_local_phy(dev);
1034
1035         if (dev_is_sata(dev)) {
1036                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1037                 if (scsi_is_sas_phy_local(phy)) {
1038                         rc = 0;
1039                         goto out;
1040                 }
1041                 /* send internal ssp/sata/smp abort command to FW */
1042                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1043                                                         dev, 1, 0);
1044                 msleep(100);
1045
1046                 /* deregister the target device */
1047                 pm8001_dev_gone_notify(dev);
1048                 msleep(200);
1049
1050                 /*send phy reset to hard reset target */
1051                 rc = sas_phy_reset(phy, 1);
1052                 msleep(2000);
1053                 pm8001_dev->setds_completion = &completion_setstate;
1054
1055                 wait_for_completion(&completion_setstate);
1056         } else {
1057                 /* send internal ssp/sata/smp abort command to FW */
1058                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1059                                                         dev, 1, 0);
1060                 msleep(100);
1061
1062                 /* deregister the target device */
1063                 pm8001_dev_gone_notify(dev);
1064                 msleep(200);
1065
1066                 /*send phy reset to hard reset target */
1067                 rc = sas_phy_reset(phy, 1);
1068                 msleep(2000);
1069         }
1070         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1071                 pm8001_dev->device_id, rc));
1072 out:
1073         sas_put_local_phy(phy);
1074
1075         return rc;
1076 }
1077 /* mandatory SAM-3, the task reset the specified LUN*/
1078 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1079 {
1080         int rc = TMF_RESP_FUNC_FAILED;
1081         struct pm8001_tmf_task tmf_task;
1082         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1083         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1084         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1085         if (dev_is_sata(dev)) {
1086                 struct sas_phy *phy = sas_get_local_phy(dev);
1087                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1088                         dev, 1, 0);
1089                 rc = sas_phy_reset(phy, 1);
1090                 sas_put_local_phy(phy);
1091                 pm8001_dev->setds_completion = &completion_setstate;
1092                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1093                         pm8001_dev, 0x01);
1094                 wait_for_completion(&completion_setstate);
1095         } else {
1096                 tmf_task.tmf = TMF_LU_RESET;
1097                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1098         }
1099         /* If failed, fall-through I_T_Nexus reset */
1100         PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1101                 pm8001_dev->device_id, rc));
1102         return rc;
1103 }
1104
1105 /* optional SAM-3 */
1106 int pm8001_query_task(struct sas_task *task)
1107 {
1108         u32 tag = 0xdeadbeef;
1109         int i = 0;
1110         struct scsi_lun lun;
1111         struct pm8001_tmf_task tmf_task;
1112         int rc = TMF_RESP_FUNC_FAILED;
1113         if (unlikely(!task || !task->lldd_task || !task->dev))
1114                 return rc;
1115
1116         if (task->task_proto & SAS_PROTOCOL_SSP) {
1117                 struct scsi_cmnd *cmnd = task->uldd_task;
1118                 struct domain_device *dev = task->dev;
1119                 struct pm8001_hba_info *pm8001_ha =
1120                         pm8001_find_ha_by_dev(dev);
1121
1122                 int_to_scsilun(cmnd->device->lun, &lun);
1123                 rc = pm8001_find_tag(task, &tag);
1124                 if (rc == 0) {
1125                         rc = TMF_RESP_FUNC_FAILED;
1126                         return rc;
1127                 }
1128                 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1129                 for (i = 0; i < 16; i++)
1130                         printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1131                 printk(KERN_INFO "]\n");
1132                 tmf_task.tmf =  TMF_QUERY_TASK;
1133                 tmf_task.tag_of_task_to_be_managed = tag;
1134
1135                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1136                 switch (rc) {
1137                 /* The task is still in Lun, release it then */
1138                 case TMF_RESP_FUNC_SUCC:
1139                         PM8001_EH_DBG(pm8001_ha,
1140                                 pm8001_printk("The task is still in Lun\n"));
1141                         break;
1142                 /* The task is not in Lun or failed, reset the phy */
1143                 case TMF_RESP_FUNC_FAILED:
1144                 case TMF_RESP_FUNC_COMPLETE:
1145                         PM8001_EH_DBG(pm8001_ha,
1146                         pm8001_printk("The task is not in Lun or failed,"
1147                         " reset the phy\n"));
1148                         break;
1149                 }
1150         }
1151         pm8001_printk(":rc= %d\n", rc);
1152         return rc;
1153 }
1154
1155 /*  mandatory SAM-3, still need free task/ccb info, abord the specified task */
1156 int pm8001_abort_task(struct sas_task *task)
1157 {
1158         unsigned long flags;
1159         u32 tag = 0xdeadbeef;
1160         u32 device_id;
1161         struct domain_device *dev ;
1162         struct pm8001_hba_info *pm8001_ha = NULL;
1163         struct pm8001_ccb_info *ccb;
1164         struct scsi_lun lun;
1165         struct pm8001_device *pm8001_dev;
1166         struct pm8001_tmf_task tmf_task;
1167         int rc = TMF_RESP_FUNC_FAILED;
1168         if (unlikely(!task || !task->lldd_task || !task->dev))
1169                 return rc;
1170         spin_lock_irqsave(&task->task_state_lock, flags);
1171         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1172                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1173                 rc = TMF_RESP_FUNC_COMPLETE;
1174                 goto out;
1175         }
1176         spin_unlock_irqrestore(&task->task_state_lock, flags);
1177         if (task->task_proto & SAS_PROTOCOL_SSP) {
1178                 struct scsi_cmnd *cmnd = task->uldd_task;
1179                 dev = task->dev;
1180                 ccb = task->lldd_task;
1181                 pm8001_dev = dev->lldd_dev;
1182                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1183                 int_to_scsilun(cmnd->device->lun, &lun);
1184                 rc = pm8001_find_tag(task, &tag);
1185                 if (rc == 0) {
1186                         printk(KERN_INFO "No such tag in %s\n", __func__);
1187                         rc = TMF_RESP_FUNC_FAILED;
1188                         return rc;
1189                 }
1190                 device_id = pm8001_dev->device_id;
1191                 PM8001_EH_DBG(pm8001_ha,
1192                         pm8001_printk("abort io to deviceid= %d\n", device_id));
1193                 tmf_task.tmf = TMF_ABORT_TASK;
1194                 tmf_task.tag_of_task_to_be_managed = tag;
1195                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1196                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1197                         pm8001_dev->sas_device, 0, tag);
1198         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1199                 task->task_proto & SAS_PROTOCOL_STP) {
1200                 dev = task->dev;
1201                 pm8001_dev = dev->lldd_dev;
1202                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1203                 rc = pm8001_find_tag(task, &tag);
1204                 if (rc == 0) {
1205                         printk(KERN_INFO "No such tag in %s\n", __func__);
1206                         rc = TMF_RESP_FUNC_FAILED;
1207                         return rc;
1208                 }
1209                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1210                         pm8001_dev->sas_device, 0, tag);
1211         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1212                 /* SMP */
1213                 dev = task->dev;
1214                 pm8001_dev = dev->lldd_dev;
1215                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1216                 rc = pm8001_find_tag(task, &tag);
1217                 if (rc == 0) {
1218                         printk(KERN_INFO "No such tag in %s\n", __func__);
1219                         rc = TMF_RESP_FUNC_FAILED;
1220                         return rc;
1221                 }
1222                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1223                         pm8001_dev->sas_device, 0, tag);
1224
1225         }
1226 out:
1227         if (rc != TMF_RESP_FUNC_COMPLETE)
1228                 pm8001_printk("rc= %d\n", rc);
1229         return rc;
1230 }
1231
1232 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1233 {
1234         int rc = TMF_RESP_FUNC_FAILED;
1235         struct pm8001_tmf_task tmf_task;
1236
1237         tmf_task.tmf = TMF_ABORT_TASK_SET;
1238         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1239         return rc;
1240 }
1241
1242 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1243 {
1244         int rc = TMF_RESP_FUNC_FAILED;
1245         struct pm8001_tmf_task tmf_task;
1246
1247         tmf_task.tmf = TMF_CLEAR_ACA;
1248         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1249
1250         return rc;
1251 }
1252
1253 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1254 {
1255         int rc = TMF_RESP_FUNC_FAILED;
1256         struct pm8001_tmf_task tmf_task;
1257         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1258         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1259
1260         PM8001_EH_DBG(pm8001_ha,
1261                 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1262                 pm8001_dev->device_id));
1263         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1264         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1265         return rc;
1266 }
1267