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 =
 120                 pci_alloc_consistent(pdev, mem_size + align, &mem_dma_handle);
 121         if (!mem_virt_alloc) {
 122                 pm8001_printk("memory allocation error\n");
 123                 return -1;
 124         }
 125         memset((void *)mem_virt_alloc, 0, mem_size+align);
 126         *pphys_addr = mem_dma_handle;
 127         phys_align = (*pphys_addr + align_offset) & ~align_offset;
 128         *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
 129         *pphys_addr_hi = upper_32_bits(phys_align);
 130         *pphys_addr_lo = lower_32_bits(phys_align);
 131         return 0;
 132 }
 133 /**
 134   * 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         DECLARE_COMPLETION_ONSTACK(completion);
 162         unsigned long flags;
 163         pm8001_ha = sas_phy->ha->lldd_ha;
 164         pm8001_ha->phy[phy_id].enable_completion = &completion;
 165         switch (func) {
 166         case PHY_FUNC_SET_LINK_RATE:
 167                 rates = funcdata;
 168                 if (rates->minimum_linkrate) {
 169                         pm8001_ha->phy[phy_id].minimum_linkrate =
 170                                 rates->minimum_linkrate;
 171                 }
 172                 if (rates->maximum_linkrate) {
 173                         pm8001_ha->phy[phy_id].maximum_linkrate =
 174                                 rates->maximum_linkrate;
 175                 }
 176                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 177                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 178                         wait_for_completion(&completion);
 179                 }
 180                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 181                                               PHY_LINK_RESET);
 182                 break;
 183         case PHY_FUNC_HARD_RESET:
 184                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 185                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 186                         wait_for_completion(&completion);
 187                 }
 188                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 189                                               PHY_HARD_RESET);
 190                 break;
 191         case PHY_FUNC_LINK_RESET:
 192                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 193                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 194                         wait_for_completion(&completion);
 195                 }
 196                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 197                                               PHY_LINK_RESET);
 198                 break;
 199         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 200                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 201                                               PHY_LINK_RESET);
 202                 break;
 203         case PHY_FUNC_DISABLE:
 204                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 205                 break;
 206         case PHY_FUNC_GET_EVENTS:
 207                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 208                 if (pm8001_ha->chip_id == chip_8001) {
 209                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 210                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 211                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 212                                 return -EINVAL;
 213                         }
 214                 }
 215                 {
 216                         struct sas_phy *phy = sas_phy->phy;
 217                         uint32_t *qp = (uint32_t *)(((char *)
 218                                 pm8001_ha->io_mem[2].memvirtaddr)
 219                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 220
 221                         phy->invalid_dword_count = qp[0];
 222                         phy->running_disparity_error_count = qp[1];
 223                         phy->loss_of_dword_sync_count = qp[3];
 224                         phy->phy_reset_problem_count = qp[4];
 225                 }
 226                 if (pm8001_ha->chip_id == chip_8001)
 227                         pm8001_bar4_shift(pm8001_ha, 0);
 228                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 229                 return 0;
 230         default:
 231                 rc = -EOPNOTSUPP;
 232         }
 233         msleep(300);
 234         return rc;
 235 }
 236
 237 /**
 238   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 239   * command to HBA.
 240   * @shost: the scsi host data.
 241   */
 242 void pm8001_scan_start(struct Scsi_Host *shost)
 243 {
 244         int i;
 245         struct pm8001_hba_info *pm8001_ha;
 246         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 247         pm8001_ha = sha->lldd_ha;
 248         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 249         if (pm8001_ha->chip_id == chip_8001)
 250                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 251         for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
 252                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 253 }
 254
 255 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 256 {
 257         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 258
 259         /* give the phy enabling interrupt event time to come in (1s
 260         * is empirically about all it takes) */
 261         if (time < HZ)
 262                 return 0;
 263         /* Wait for discovery to finish */
 264         sas_drain_work(ha);
 265         return 1;
 266 }
 267
 268 /**
 269   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 270   * @pm8001_ha: our hba card information
 271   * @ccb: the ccb which attached to smp task
 272   */
 273 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 274         struct pm8001_ccb_info *ccb)
 275 {
 276         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 277 }
 278
 279 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 280 {
 281         struct ata_queued_cmd *qc = task->uldd_task;
 282         if (qc) {
 283                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 284                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 285                         *tag = qc->tag;
 286                         return 1;
 287                 }
 288         }
 289         return 0;
 290 }
 291
 292 /**
 293   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 294   * @pm8001_ha: our hba card information
 295   * @ccb: the ccb which attached to sata task
 296   */
 297 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 298         struct pm8001_ccb_info *ccb)
 299 {
 300         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 301 }
 302
 303 /**
 304   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 305   * @pm8001_ha: our hba card information
 306   * @ccb: the ccb which attached to TM
 307   * @tmf: the task management IU
 308   */
 309 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 310         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 311 {
 312         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 313 }
 314
 315 /**
 316   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 317   * @pm8001_ha: our hba card information
 318   * @ccb: the ccb which attached to ssp task
 319   */
 320 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 321         struct pm8001_ccb_info *ccb)
 322 {
 323         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 324 }
 325
 326  /* Find the local port id that's attached to this device */
 327 static int sas_find_local_port_id(struct domain_device *dev)
 328 {
 329         struct domain_device *pdev = dev->parent;
 330
 331         /* Directly attached device */
 332         if (!pdev)
 333                 return dev->port->id;
 334         while (pdev) {
 335                 struct domain_device *pdev_p = pdev->parent;
 336                 if (!pdev_p)
 337                         return pdev->port->id;
 338                 pdev = pdev->parent;
 339         }
 340         return 0;
 341 }
 342
 343 /**
 344   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 345   * @task: the task to be execute.
 346   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 347   * we always execute one one time.
 348   * @gfp_flags: gfp_flags.
 349   * @is_tmf: if it is task management task.
 350   * @tmf: the task management IU
 351   */
 352 #define DEV_IS_GONE(pm8001_dev) \
 353         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 354 static int pm8001_task_exec(struct sas_task *task, const int num,
 355         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 356 {
 357         struct domain_device *dev = task->dev;
 358         struct pm8001_hba_info *pm8001_ha;
 359         struct pm8001_device *pm8001_dev;
 360         struct pm8001_port *port = NULL;
 361         struct sas_task *t = task;
 362         struct pm8001_ccb_info *ccb;
 363         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 364         u32 n = num;
 365         unsigned long flags = 0;
 366
 367         if (!dev->port) {
 368                 struct task_status_struct *tsm = &t->task_status;
 369                 tsm->resp = SAS_TASK_UNDELIVERED;
 370                 tsm->stat = SAS_PHY_DOWN;
 371                 if (dev->dev_type != SAS_SATA_DEV)
 372                         t->task_done(t);
 373                 return 0;
 374         }
 375         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 376         PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 377         spin_lock_irqsave(&pm8001_ha->lock, flags);
 378         do {
 379                 dev = t->dev;
 380                 pm8001_dev = dev->lldd_dev;
 381                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 382                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 383                         if (sas_protocol_ata(t->task_proto)) {
 384                                 struct task_status_struct *ts = &t->task_status;
 385                                 ts->resp = SAS_TASK_UNDELIVERED;
 386                                 ts->stat = SAS_PHY_DOWN;
 387
 388                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 389                                 t->task_done(t);
 390                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 391                                 if (n > 1)
 392                                         t = list_entry(t->list.next,
 393                                                         struct sas_task, list);
 394                                 continue;
 395                         } else {
 396                                 struct task_status_struct *ts = &t->task_status;
 397                                 ts->resp = SAS_TASK_UNDELIVERED;
 398                                 ts->stat = SAS_PHY_DOWN;
 399                                 t->task_done(t);
 400                                 if (n > 1)
 401                                         t = list_entry(t->list.next,
 402                                                         struct sas_task, list);
 403                                 continue;
 404                         }
 405                 }
 406                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 407                 if (rc)
 408                         goto err_out;
 409                 ccb = &pm8001_ha->ccb_info[tag];
 410
 411                 if (!sas_protocol_ata(t->task_proto)) {
 412                         if (t->num_scatter) {
 413                                 n_elem = dma_map_sg(pm8001_ha->dev,
 414                                         t->scatter,
 415                                         t->num_scatter,
 416                                         t->data_dir);
 417                                 if (!n_elem) {
 418                                         rc = -ENOMEM;
 419                                         goto err_out_tag;
 420                                 }
 421                         }
 422                 } else {
 423                         n_elem = t->num_scatter;
 424                 }
 425
 426                 t->lldd_task = ccb;
 427                 ccb->n_elem = n_elem;
 428                 ccb->ccb_tag = tag;
 429                 ccb->task = t;
 430                 ccb->device = pm8001_dev;
 431                 switch (t->task_proto) {
 432                 case SAS_PROTOCOL_SMP:
 433                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 434                         break;
 435                 case SAS_PROTOCOL_SSP:
 436                         if (is_tmf)
 437                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 438                                         ccb, tmf);
 439                         else
 440                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 441                         break;
 442                 case SAS_PROTOCOL_SATA:
 443                 case SAS_PROTOCOL_STP:
 444                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 445                         break;
 446                 default:
 447                         dev_printk(KERN_ERR, pm8001_ha->dev,
 448                                 "unknown sas_task proto: 0x%x\n",
 449                                 t->task_proto);
 450                         rc = -EINVAL;
 451                         break;
 452                 }
 453
 454                 if (rc) {
 455                         PM8001_IO_DBG(pm8001_ha,
 456                                 pm8001_printk("rc is %x\n", rc));
 457                         goto err_out_tag;
 458                 }
 459                 /* TODO: select normal or high priority */
 460                 spin_lock(&t->task_state_lock);
 461                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 462                 spin_unlock(&t->task_state_lock);
 463                 pm8001_dev->running_req++;
 464                 if (n > 1)
 465                         t = list_entry(t->list.next, struct sas_task, list);
 466         } while (--n);
 467         rc = 0;
 468         goto out_done;
 469
 470 err_out_tag:
 471         pm8001_tag_free(pm8001_ha, tag);
 472 err_out:
 473         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 474         if (!sas_protocol_ata(t->task_proto))
 475                 if (n_elem)
 476                         dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem,
 477                                 t->data_dir);
 478 out_done:
 479         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 480         return rc;
 481 }
 482
 483 /**
 484   * pm8001_queue_command - register for upper layer used, all IO commands sent
 485   * to HBA are from this interface.
 486   * @task: the task to be execute.
 487   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 488   * we always execute one one time
 489   * @gfp_flags: gfp_flags
 490   */
 491 int pm8001_queue_command(struct sas_task *task, const int num,
 492                 gfp_t gfp_flags)
 493 {
 494         return pm8001_task_exec(task, num, gfp_flags, 0, NULL);
 495 }
 496
 497 /**
 498   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 499   * @pm8001_ha: our hba card information
 500   * @ccb: the ccb which attached to ssp task
 501   * @task: the task to be free.
 502   * @ccb_idx: ccb index.
 503   */
 504 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 505         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 506 {
 507         if (!ccb->task)
 508                 return;
 509         if (!sas_protocol_ata(task->task_proto))
 510                 if (ccb->n_elem)
 511                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 512                                 task->num_scatter, task->data_dir);
 513
 514         switch (task->task_proto) {
 515         case SAS_PROTOCOL_SMP:
 516                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 517                         PCI_DMA_FROMDEVICE);
 518                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 519                         PCI_DMA_TODEVICE);
 520                 break;
 521
 522         case SAS_PROTOCOL_SATA:
 523         case SAS_PROTOCOL_STP:
 524         case SAS_PROTOCOL_SSP:
 525         default:
 526                 /* do nothing */
 527                 break;
 528         }
 529         task->lldd_task = NULL;
 530         ccb->task = NULL;
 531         ccb->ccb_tag = 0xFFFFFFFF;
 532         ccb->open_retry = 0;
 533         pm8001_tag_free(pm8001_ha, ccb_idx);
 534 }
 535
 536  /**
 537   * pm8001_alloc_dev - find a empty pm8001_device
 538   * @pm8001_ha: our hba card information
 539   */
 540 struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 541 {
 542         u32 dev;
 543         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 544                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 545                         pm8001_ha->devices[dev].id = dev;
 546                         return &pm8001_ha->devices[dev];
 547                 }
 548         }
 549         if (dev == PM8001_MAX_DEVICES) {
 550                 PM8001_FAIL_DBG(pm8001_ha,
 551                         pm8001_printk("max support %d devices, ignore ..\n",
 552                         PM8001_MAX_DEVICES));
 553         }
 554         return NULL;
 555 }
 556 /**
 557   * pm8001_find_dev - find a matching pm8001_device
 558   * @pm8001_ha: our hba card information
 559   */
 560 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 561                                         u32 device_id)
 562 {
 563         u32 dev;
 564         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 565                 if (pm8001_ha->devices[dev].device_id == device_id)
 566                         return &pm8001_ha->devices[dev];
 567         }
 568         if (dev == PM8001_MAX_DEVICES) {
 569                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 570                                 "DEVICE FOUND !!!\n"));
 571         }
 572         return NULL;
 573 }
 574
 575 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 576 {
 577         u32 id = pm8001_dev->id;
 578         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 579         pm8001_dev->id = id;
 580         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 581         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 582         pm8001_dev->sas_device = NULL;
 583 }
 584
 585 /**
 586   * pm8001_dev_found_notify - libsas notify a device is found.
 587   * @dev: the device structure which sas layer used.
 588   *
 589   * when libsas find a sas domain device, it should tell the LLDD that
 590   * device is found, and then LLDD register this device to HBA firmware
 591   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 592   * device ID(according to device's sas address) and returned it to LLDD. From
 593   * now on, we communicate with HBA FW with the device ID which HBA assigned
 594   * rather than sas address. it is the necessary step for our HBA but it is
 595   * the optional for other HBA driver.
 596   */
 597 static int pm8001_dev_found_notify(struct domain_device *dev)
 598 {
 599         unsigned long flags = 0;
 600         int res = 0;
 601         struct pm8001_hba_info *pm8001_ha = NULL;
 602         struct domain_device *parent_dev = dev->parent;
 603         struct pm8001_device *pm8001_device;
 604         DECLARE_COMPLETION_ONSTACK(completion);
 605         u32 flag = 0;
 606         pm8001_ha = pm8001_find_ha_by_dev(dev);
 607         spin_lock_irqsave(&pm8001_ha->lock, flags);
 608
 609         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 610         if (!pm8001_device) {
 611                 res = -1;
 612                 goto found_out;
 613         }
 614         pm8001_device->sas_device = dev;
 615         dev->lldd_dev = pm8001_device;
 616         pm8001_device->dev_type = dev->dev_type;
 617         pm8001_device->dcompletion = &completion;
 618         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 619                 int phy_id;
 620                 struct ex_phy *phy;
 621                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 622                 phy_id++) {
 623                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 624                         if (SAS_ADDR(phy->attached_sas_addr)
 625                                 == SAS_ADDR(dev->sas_addr)) {
 626                                 pm8001_device->attached_phy = phy_id;
 627                                 break;
 628                         }
 629                 }
 630                 if (phy_id == parent_dev->ex_dev.num_phys) {
 631                         PM8001_FAIL_DBG(pm8001_ha,
 632                         pm8001_printk("Error: no attached dev:%016llx"
 633                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 634                                 SAS_ADDR(parent_dev->sas_addr)));
 635                         res = -1;
 636                 }
 637         } else {
 638                 if (dev->dev_type == SAS_SATA_DEV) {
 639                         pm8001_device->attached_phy =
 640                                 dev->rphy->identify.phy_identifier;
 641                                 flag = 1; /* directly sata*/
 642                 }
 643         } /*register this device to HBA*/
 644         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 645         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 646         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 647         wait_for_completion(&completion);
 648         if (dev->dev_type == SAS_END_DEVICE)
 649                 msleep(50);
 650         pm8001_ha->flags = PM8001F_RUN_TIME;
 651         return 0;
 652 found_out:
 653         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 654         return res;
 655 }
 656
 657 int pm8001_dev_found(struct domain_device *dev)
 658 {
 659         return pm8001_dev_found_notify(dev);
 660 }
 661
 662 void pm8001_task_done(struct sas_task *task)
 663 {
 664         if (!del_timer(&task->slow_task->timer))
 665                 return;
 666         complete(&task->slow_task->completion);
 667 }
 668
 669 static void pm8001_tmf_timedout(unsigned long data)
 670 {
 671         struct sas_task *task = (struct sas_task *)data;
 672
 673         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 674         complete(&task->slow_task->completion);
 675 }
 676
 677 #define PM8001_TASK_TIMEOUT 20
 678 /**
 679   * pm8001_exec_internal_tmf_task - execute some task management commands.
 680   * @dev: the wanted device.
 681   * @tmf: which task management wanted to be take.
 682   * @para_len: para_len.
 683   * @parameter: ssp task parameter.
 684   *
 685   * when errors or exception happened, we may want to do something, for example
 686   * abort the issued task which result in this execption, it is done by calling
 687   * this function, note it is also with the task execute interface.
 688   */
 689 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 690         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 691 {
 692         int res, retry;
 693         struct sas_task *task = NULL;
 694         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 695         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 696         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 697
 698         for (retry = 0; retry < 3; retry++) {
 699                 task = sas_alloc_slow_task(GFP_KERNEL);
 700                 if (!task)
 701                         return -ENOMEM;
 702
 703                 task->dev = dev;
 704                 task->task_proto = dev->tproto;
 705                 memcpy(&task->ssp_task, parameter, para_len);
 706                 task->task_done = pm8001_task_done;
 707                 task->slow_task->timer.data = (unsigned long)task;
 708                 task->slow_task->timer.function = pm8001_tmf_timedout;
 709                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 710                 add_timer(&task->slow_task->timer);
 711
 712                 res = pm8001_task_exec(task, 1, GFP_KERNEL, 1, tmf);
 713
 714                 if (res) {
 715                         del_timer(&task->slow_task->timer);
 716                         PM8001_FAIL_DBG(pm8001_ha,
 717                                 pm8001_printk("Executing internal task "
 718                                 "failed\n"));
 719                         goto ex_err;
 720                 }
 721                 wait_for_completion(&task->slow_task->completion);
 722                 if (pm8001_ha->chip_id != chip_8001) {
 723                         pm8001_dev->setds_completion = &completion_setstate;
 724                                 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 725                                         pm8001_dev, 0x01);
 726                         wait_for_completion(&completion_setstate);
 727                 }
 728                 res = -TMF_RESP_FUNC_FAILED;
 729                 /* Even TMF timed out, return direct. */
 730                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 731                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 732                                 PM8001_FAIL_DBG(pm8001_ha,
 733                                         pm8001_printk("TMF task[%x]timeout.\n",
 734                                         tmf->tmf));
 735                                 goto ex_err;
 736                         }
 737                 }
 738
 739                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 740                         task->task_status.stat == SAM_STAT_GOOD) {
 741                         res = TMF_RESP_FUNC_COMPLETE;
 742                         break;
 743                 }
 744
 745                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 746                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 747                         /* no error, but return the number of bytes of
 748                         * underrun */
 749                         res = task->task_status.residual;
 750                         break;
 751                 }
 752
 753                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 754                         task->task_status.stat == SAS_DATA_OVERRUN) {
 755                         PM8001_FAIL_DBG(pm8001_ha,
 756                                 pm8001_printk("Blocked task error.\n"));
 757                         res = -EMSGSIZE;
 758                         break;
 759                 } else {
 760                         PM8001_EH_DBG(pm8001_ha,
 761                                 pm8001_printk(" Task to dev %016llx response:"
 762                                 "0x%x status 0x%x\n",
 763                                 SAS_ADDR(dev->sas_addr),
 764                                 task->task_status.resp,
 765                                 task->task_status.stat));
 766                         sas_free_task(task);
 767                         task = NULL;
 768                 }
 769         }
 770 ex_err:
 771         BUG_ON(retry == 3 && task != NULL);
 772         sas_free_task(task);
 773         return res;
 774 }
 775
 776 static int
 777 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 778         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 779         u32 task_tag)
 780 {
 781         int res, retry;
 782         u32 ccb_tag;
 783         struct pm8001_ccb_info *ccb;
 784         struct sas_task *task = NULL;
 785
 786         for (retry = 0; retry < 3; retry++) {
 787                 task = sas_alloc_slow_task(GFP_KERNEL);
 788                 if (!task)
 789                         return -ENOMEM;
 790
 791                 task->dev = dev;
 792                 task->task_proto = dev->tproto;
 793                 task->task_done = pm8001_task_done;
 794                 task->slow_task->timer.data = (unsigned long)task;
 795                 task->slow_task->timer.function = pm8001_tmf_timedout;
 796                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 797                 add_timer(&task->slow_task->timer);
 798
 799                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 800                 if (res)
 801                         return res;
 802                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 803                 ccb->device = pm8001_dev;
 804                 ccb->ccb_tag = ccb_tag;
 805                 ccb->task = task;
 806
 807                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 808                         pm8001_dev, flag, task_tag, ccb_tag);
 809
 810                 if (res) {
 811                         del_timer(&task->slow_task->timer);
 812                         PM8001_FAIL_DBG(pm8001_ha,
 813                                 pm8001_printk("Executing internal task "
 814                                 "failed\n"));
 815                         goto ex_err;
 816                 }
 817                 wait_for_completion(&task->slow_task->completion);
 818                 res = TMF_RESP_FUNC_FAILED;
 819                 /* Even TMF timed out, return direct. */
 820                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 821                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 822                                 PM8001_FAIL_DBG(pm8001_ha,
 823                                         pm8001_printk("TMF task timeout.\n"));
 824                                 goto ex_err;
 825                         }
 826                 }
 827
 828                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 829                         task->task_status.stat == SAM_STAT_GOOD) {
 830                         res = TMF_RESP_FUNC_COMPLETE;
 831                         break;
 832
 833                 } else {
 834                         PM8001_EH_DBG(pm8001_ha,
 835                                 pm8001_printk(" Task to dev %016llx response: "
 836                                         "0x%x status 0x%x\n",
 837                                 SAS_ADDR(dev->sas_addr),
 838                                 task->task_status.resp,
 839                                 task->task_status.stat));
 840                         sas_free_task(task);
 841                         task = NULL;
 842                 }
 843         }
 844 ex_err:
 845         BUG_ON(retry == 3 && task != NULL);
 846         sas_free_task(task);
 847         return res;
 848 }
 849
 850 /**
 851   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 852   * @dev: the device structure which sas layer used.
 853   */
 854 static void pm8001_dev_gone_notify(struct domain_device *dev)
 855 {
 856         unsigned long flags = 0;
 857         struct pm8001_hba_info *pm8001_ha;
 858         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 859
 860         pm8001_ha = pm8001_find_ha_by_dev(dev);
 861         spin_lock_irqsave(&pm8001_ha->lock, flags);
 862         if (pm8001_dev) {
 863                 u32 device_id = pm8001_dev->device_id;
 864
 865                 PM8001_DISC_DBG(pm8001_ha,
 866                         pm8001_printk("found dev[%d:%x] is gone.\n",
 867                         pm8001_dev->device_id, pm8001_dev->dev_type));
 868                 if (pm8001_dev->running_req) {
 869                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 870                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 871                                 dev, 1, 0);
 872                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 873                 }
 874                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 875                 pm8001_free_dev(pm8001_dev);
 876         } else {
 877                 PM8001_DISC_DBG(pm8001_ha,
 878                         pm8001_printk("Found dev has gone.\n"));
 879         }
 880         dev->lldd_dev = NULL;
 881         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 882 }
 883
 884 void pm8001_dev_gone(struct domain_device *dev)
 885 {
 886         pm8001_dev_gone_notify(dev);
 887 }
 888
 889 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 890         u8 *lun, struct pm8001_tmf_task *tmf)
 891 {
 892         struct sas_ssp_task ssp_task;
 893         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 894                 return TMF_RESP_FUNC_ESUPP;
 895
 896         strncpy((u8 *)&ssp_task.LUN, lun, 8);
 897         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 898                 tmf);
 899 }
 900
 901 /* retry commands by ha, by task and/or by device */
 902 void pm8001_open_reject_retry(
 903         struct pm8001_hba_info *pm8001_ha,
 904         struct sas_task *task_to_close,
 905         struct pm8001_device *device_to_close)
 906 {
 907         int i;
 908         unsigned long flags;
 909
 910         if (pm8001_ha == NULL)
 911                 return;
 912
 913         spin_lock_irqsave(&pm8001_ha->lock, flags);
 914
 915         for (i = 0; i < PM8001_MAX_CCB; i++) {
 916                 struct sas_task *task;
 917                 struct task_status_struct *ts;
 918                 struct pm8001_device *pm8001_dev;
 919                 unsigned long flags1;
 920                 u32 tag;
 921                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 922
 923                 pm8001_dev = ccb->device;
 924                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 925                         continue;
 926                 if (!device_to_close) {
 927                         uintptr_t d = (uintptr_t)pm8001_dev
 928                                         - (uintptr_t)&pm8001_ha->devices;
 929                         if (((d % sizeof(*pm8001_dev)) != 0)
 930                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 931                                 continue;
 932                 } else if (pm8001_dev != device_to_close)
 933                         continue;
 934                 tag = ccb->ccb_tag;
 935                 if (!tag || (tag == 0xFFFFFFFF))
 936                         continue;
 937                 task = ccb->task;
 938                 if (!task || !task->task_done)
 939                         continue;
 940                 if (task_to_close && (task != task_to_close))
 941                         continue;
 942                 ts = &task->task_status;
 943                 ts->resp = SAS_TASK_COMPLETE;
 944                 /* Force the midlayer to retry */
 945                 ts->stat = SAS_OPEN_REJECT;
 946                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 947                 if (pm8001_dev)
 948                         pm8001_dev->running_req--;
 949                 spin_lock_irqsave(&task->task_state_lock, flags1);
 950                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 951                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 952                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 953                 if (unlikely((task->task_state_flags
 954                                 & SAS_TASK_STATE_ABORTED))) {
 955                         spin_unlock_irqrestore(&task->task_state_lock,
 956                                 flags1);
 957                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 958                 } else {
 959                         spin_unlock_irqrestore(&task->task_state_lock,
 960                                 flags1);
 961                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 962                         mb();/* in order to force CPU ordering */
 963                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 964                         task->task_done(task);
 965                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 966                 }
 967         }
 968
 969         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 970 }
 971
 972 /**
 973   * Standard mandates link reset for ATA  (type 0) and hard reset for
 974   * SSP (type 1) , only for RECOVERY
 975   */
 976 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 977 {
 978         int rc = TMF_RESP_FUNC_FAILED;
 979         struct pm8001_device *pm8001_dev;
 980         struct pm8001_hba_info *pm8001_ha;
 981         struct sas_phy *phy;
 982
 983         if (!dev || !dev->lldd_dev)
 984                 return -ENODEV;
 985
 986         pm8001_dev = dev->lldd_dev;
 987         pm8001_ha = pm8001_find_ha_by_dev(dev);
 988         phy = sas_get_local_phy(dev);
 989
 990         if (dev_is_sata(dev)) {
 991                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
 992                 if (scsi_is_sas_phy_local(phy)) {
 993                         rc = 0;
 994                         goto out;
 995                 }
 996                 rc = sas_phy_reset(phy, 1);
 997                 msleep(2000);
 998                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 999                         dev, 1, 0);
1000                 pm8001_dev->setds_completion = &completion_setstate;
1001                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1002                         pm8001_dev, 0x01);
1003                 wait_for_completion(&completion_setstate);
1004         } else {
1005                 rc = sas_phy_reset(phy, 1);
1006                 msleep(2000);
1007         }
1008         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1009                 pm8001_dev->device_id, rc));
1010  out:
1011         sas_put_local_phy(phy);
1012         return rc;
1013 }
1014
1015 /*
1016 * This function handle the IT_NEXUS_XXX event or completion
1017 * status code for SSP/SATA/SMP I/O request.
1018 */
1019 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1020 {
1021         int rc = TMF_RESP_FUNC_FAILED;
1022         struct pm8001_device *pm8001_dev;
1023         struct pm8001_hba_info *pm8001_ha;
1024         struct sas_phy *phy;
1025         u32 device_id = 0;
1026
1027         if (!dev || !dev->lldd_dev)
1028                 return -1;
1029
1030         pm8001_dev = dev->lldd_dev;
1031         device_id = pm8001_dev->device_id;
1032         pm8001_ha = pm8001_find_ha_by_dev(dev);
1033
1034         PM8001_EH_DBG(pm8001_ha,
1035                         pm8001_printk("I_T_Nexus handler invoked !!"));
1036
1037         phy = sas_get_local_phy(dev);
1038
1039         if (dev_is_sata(dev)) {
1040                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1041                 if (scsi_is_sas_phy_local(phy)) {
1042                         rc = 0;
1043                         goto out;
1044                 }
1045                 /* send internal ssp/sata/smp abort command to FW */
1046                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1047                                                         dev, 1, 0);
1048                 msleep(100);
1049
1050                 /* deregister the target device */
1051                 pm8001_dev_gone_notify(dev);
1052                 msleep(200);
1053
1054                 /*send phy reset to hard reset target */
1055                 rc = sas_phy_reset(phy, 1);
1056                 msleep(2000);
1057                 pm8001_dev->setds_completion = &completion_setstate;
1058
1059                 wait_for_completion(&completion_setstate);
1060         } else {
1061                 /* send internal ssp/sata/smp abort command to FW */
1062                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1063                                                         dev, 1, 0);
1064                 msleep(100);
1065
1066                 /* deregister the target device */
1067                 pm8001_dev_gone_notify(dev);
1068                 msleep(200);
1069
1070                 /*send phy reset to hard reset target */
1071                 rc = sas_phy_reset(phy, 1);
1072                 msleep(2000);
1073         }
1074         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1075                 pm8001_dev->device_id, rc));
1076 out:
1077         sas_put_local_phy(phy);
1078
1079         return rc;
1080 }
1081 /* mandatory SAM-3, the task reset the specified LUN*/
1082 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1083 {
1084         int rc = TMF_RESP_FUNC_FAILED;
1085         struct pm8001_tmf_task tmf_task;
1086         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1087         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1088         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1089         if (dev_is_sata(dev)) {
1090                 struct sas_phy *phy = sas_get_local_phy(dev);
1091                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1092                         dev, 1, 0);
1093                 rc = sas_phy_reset(phy, 1);
1094                 sas_put_local_phy(phy);
1095                 pm8001_dev->setds_completion = &completion_setstate;
1096                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1097                         pm8001_dev, 0x01);
1098                 wait_for_completion(&completion_setstate);
1099         } else {
1100                 tmf_task.tmf = TMF_LU_RESET;
1101                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1102         }
1103         /* If failed, fall-through I_T_Nexus reset */
1104         PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1105                 pm8001_dev->device_id, rc));
1106         return rc;
1107 }
1108
1109 /* optional SAM-3 */
1110 int pm8001_query_task(struct sas_task *task)
1111 {
1112         u32 tag = 0xdeadbeef;
1113         int i = 0;
1114         struct scsi_lun lun;
1115         struct pm8001_tmf_task tmf_task;
1116         int rc = TMF_RESP_FUNC_FAILED;
1117         if (unlikely(!task || !task->lldd_task || !task->dev))
1118                 return rc;
1119
1120         if (task->task_proto & SAS_PROTOCOL_SSP) {
1121                 struct scsi_cmnd *cmnd = task->uldd_task;
1122                 struct domain_device *dev = task->dev;
1123                 struct pm8001_hba_info *pm8001_ha =
1124                         pm8001_find_ha_by_dev(dev);
1125
1126                 int_to_scsilun(cmnd->device->lun, &lun);
1127                 rc = pm8001_find_tag(task, &tag);
1128                 if (rc == 0) {
1129                         rc = TMF_RESP_FUNC_FAILED;
1130                         return rc;
1131                 }
1132                 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1133                 for (i = 0; i < 16; i++)
1134                         printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1135                 printk(KERN_INFO "]\n");
1136                 tmf_task.tmf =  TMF_QUERY_TASK;
1137                 tmf_task.tag_of_task_to_be_managed = tag;
1138
1139                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1140                 switch (rc) {
1141                 /* The task is still in Lun, release it then */
1142                 case TMF_RESP_FUNC_SUCC:
1143                         PM8001_EH_DBG(pm8001_ha,
1144                                 pm8001_printk("The task is still in Lun\n"));
1145                         break;
1146                 /* The task is not in Lun or failed, reset the phy */
1147                 case TMF_RESP_FUNC_FAILED:
1148                 case TMF_RESP_FUNC_COMPLETE:
1149                         PM8001_EH_DBG(pm8001_ha,
1150                         pm8001_printk("The task is not in Lun or failed,"
1151                         " reset the phy\n"));
1152                         break;
1153                 }
1154         }
1155         pm8001_printk(":rc= %d\n", rc);
1156         return rc;
1157 }
1158
1159 /*  mandatory SAM-3, still need free task/ccb info, abord the specified task */
1160 int pm8001_abort_task(struct sas_task *task)
1161 {
1162         unsigned long flags;
1163         u32 tag = 0xdeadbeef;
1164         u32 device_id;
1165         struct domain_device *dev ;
1166         struct pm8001_hba_info *pm8001_ha = NULL;
1167         struct pm8001_ccb_info *ccb;
1168         struct scsi_lun lun;
1169         struct pm8001_device *pm8001_dev;
1170         struct pm8001_tmf_task tmf_task;
1171         int rc = TMF_RESP_FUNC_FAILED;
1172         if (unlikely(!task || !task->lldd_task || !task->dev))
1173                 return rc;
1174         spin_lock_irqsave(&task->task_state_lock, flags);
1175         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1176                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1177                 rc = TMF_RESP_FUNC_COMPLETE;
1178                 goto out;
1179         }
1180         spin_unlock_irqrestore(&task->task_state_lock, flags);
1181         if (task->task_proto & SAS_PROTOCOL_SSP) {
1182                 struct scsi_cmnd *cmnd = task->uldd_task;
1183                 dev = task->dev;
1184                 ccb = task->lldd_task;
1185                 pm8001_dev = dev->lldd_dev;
1186                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1187                 int_to_scsilun(cmnd->device->lun, &lun);
1188                 rc = pm8001_find_tag(task, &tag);
1189                 if (rc == 0) {
1190                         printk(KERN_INFO "No such tag in %s\n", __func__);
1191                         rc = TMF_RESP_FUNC_FAILED;
1192                         return rc;
1193                 }
1194                 device_id = pm8001_dev->device_id;
1195                 PM8001_EH_DBG(pm8001_ha,
1196                         pm8001_printk("abort io to deviceid= %d\n", device_id));
1197                 tmf_task.tmf = TMF_ABORT_TASK;
1198                 tmf_task.tag_of_task_to_be_managed = tag;
1199                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1200                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1201                         pm8001_dev->sas_device, 0, tag);
1202         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1203                 task->task_proto & SAS_PROTOCOL_STP) {
1204                 dev = task->dev;
1205                 pm8001_dev = dev->lldd_dev;
1206                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1207                 rc = pm8001_find_tag(task, &tag);
1208                 if (rc == 0) {
1209                         printk(KERN_INFO "No such tag in %s\n", __func__);
1210                         rc = TMF_RESP_FUNC_FAILED;
1211                         return rc;
1212                 }
1213                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1214                         pm8001_dev->sas_device, 0, tag);
1215         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1216                 /* SMP */
1217                 dev = task->dev;
1218                 pm8001_dev = dev->lldd_dev;
1219                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1220                 rc = pm8001_find_tag(task, &tag);
1221                 if (rc == 0) {
1222                         printk(KERN_INFO "No such tag in %s\n", __func__);
1223                         rc = TMF_RESP_FUNC_FAILED;
1224                         return rc;
1225                 }
1226                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1227                         pm8001_dev->sas_device, 0, tag);
1228
1229         }
1230 out:
1231         if (rc != TMF_RESP_FUNC_COMPLETE)
1232                 pm8001_printk("rc= %d\n", rc);
1233         return rc;
1234 }
1235
1236 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1237 {
1238         int rc = TMF_RESP_FUNC_FAILED;
1239         struct pm8001_tmf_task tmf_task;
1240
1241         tmf_task.tmf = TMF_ABORT_TASK_SET;
1242         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1243         return rc;
1244 }
1245
1246 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1247 {
1248         int rc = TMF_RESP_FUNC_FAILED;
1249         struct pm8001_tmf_task tmf_task;
1250
1251         tmf_task.tmf = TMF_CLEAR_ACA;
1252         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1253
1254         return rc;
1255 }
1256
1257 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1258 {
1259         int rc = TMF_RESP_FUNC_FAILED;
1260         struct pm8001_tmf_task tmf_task;
1261         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1262         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1263
1264         PM8001_EH_DBG(pm8001_ha,
1265                 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1266                 pm8001_dev->device_id));
1267         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1268         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1269         return rc;
1270 }
1271