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_clear - clear the tags bitmap
  62   * @pm8001_ha: our hba struct
  63   * @tag: the found tag associated with the task
  64   */
  65 static void pm8001_tag_clear(struct pm8001_hba_info *pm8001_ha, u32 tag)
  66 {
  67         void *bitmap = pm8001_ha->tags;
  68         clear_bit(tag, bitmap);
  69 }
  70
  71 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
  72 {
  73         pm8001_tag_clear(pm8001_ha, tag);
  74 }
  75
  76 static void pm8001_tag_set(struct pm8001_hba_info *pm8001_ha, u32 tag)
  77 {
  78         void *bitmap = pm8001_ha->tags;
  79         set_bit(tag, bitmap);
  80 }
  81
  82 /**
  83   * pm8001_tag_alloc - allocate a empty tag for task used.
  84   * @pm8001_ha: our hba struct
  85   * @tag_out: the found empty tag .
  86   */
  87 inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
  88 {
  89         unsigned int index, tag;
  90         void *bitmap = pm8001_ha->tags;
  91
  92         index = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
  93         tag = index;
  94         if (tag >= pm8001_ha->tags_num)
  95                 return -SAS_QUEUE_FULL;
  96         pm8001_tag_set(pm8001_ha, tag);
  97         *tag_out = tag;
  98         return 0;
  99 }
 100
 101 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
 102 {
 103         int i;
 104         for (i = 0; i < pm8001_ha->tags_num; ++i)
 105                 pm8001_tag_clear(pm8001_ha, i);
 106 }
 107
 108  /**
 109   * pm8001_mem_alloc - allocate memory for pm8001.
 110   * @pdev: pci device.
 111   * @virt_addr: the allocated virtual address
 112   * @pphys_addr_hi: the physical address high byte address.
 113   * @pphys_addr_lo: the physical address low byte address.
 114   * @mem_size: memory size.
 115   */
 116 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
 117         dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
 118         u32 *pphys_addr_lo, u32 mem_size, u32 align)
 119 {
 120         caddr_t mem_virt_alloc;
 121         dma_addr_t mem_dma_handle;
 122         u64 phys_align;
 123         u64 align_offset = 0;
 124         if (align)
 125                 align_offset = (dma_addr_t)align - 1;
 126         mem_virt_alloc =
 127                 pci_alloc_consistent(pdev, mem_size + align, &mem_dma_handle);
 128         if (!mem_virt_alloc) {
 129                 pm8001_printk("memory allocation error\n");
 130                 return -1;
 131         }
 132         memset((void *)mem_virt_alloc, 0, mem_size+align);
 133         *pphys_addr = mem_dma_handle;
 134         phys_align = (*pphys_addr + align_offset) & ~align_offset;
 135         *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
 136         *pphys_addr_hi = upper_32_bits(phys_align);
 137         *pphys_addr_lo = lower_32_bits(phys_align);
 138         return 0;
 139 }
 140 /**
 141   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 142   * find out our hba struct.
 143   * @dev: the domain device which from sas layer.
 144   */
 145 static
 146 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 147 {
 148         struct sas_ha_struct *sha = dev->port->ha;
 149         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 150         return pm8001_ha;
 151 }
 152
 153 /**
 154   * pm8001_phy_control - this function should be registered to
 155   * sas_domain_function_template to provide libsas used, note: this is just
 156   * control the HBA phy rather than other expander phy if you want control
 157   * other phy, you should use SMP command.
 158   * @sas_phy: which phy in HBA phys.
 159   * @func: the operation.
 160   * @funcdata: always NULL.
 161   */
 162 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 163         void *funcdata)
 164 {
 165         int rc = 0, phy_id = sas_phy->id;
 166         struct pm8001_hba_info *pm8001_ha = NULL;
 167         struct sas_phy_linkrates *rates;
 168         DECLARE_COMPLETION_ONSTACK(completion);
 169         unsigned long flags;
 170         pm8001_ha = sas_phy->ha->lldd_ha;
 171         pm8001_ha->phy[phy_id].enable_completion = &completion;
 172         switch (func) {
 173         case PHY_FUNC_SET_LINK_RATE:
 174                 rates = funcdata;
 175                 if (rates->minimum_linkrate) {
 176                         pm8001_ha->phy[phy_id].minimum_linkrate =
 177                                 rates->minimum_linkrate;
 178                 }
 179                 if (rates->maximum_linkrate) {
 180                         pm8001_ha->phy[phy_id].maximum_linkrate =
 181                                 rates->maximum_linkrate;
 182                 }
 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_LINK_RESET);
 189                 break;
 190         case PHY_FUNC_HARD_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_HARD_RESET);
 197                 break;
 198         case PHY_FUNC_LINK_RESET:
 199                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 200                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 201                         wait_for_completion(&completion);
 202                 }
 203                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 204                                               PHY_LINK_RESET);
 205                 break;
 206         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 207                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 208                                               PHY_LINK_RESET);
 209                 break;
 210         case PHY_FUNC_DISABLE:
 211                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 212                 break;
 213         case PHY_FUNC_GET_EVENTS:
 214                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 215                 if (pm8001_ha->chip_id == chip_8001) {
 216                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 217                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 218                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 219                                 return -EINVAL;
 220                         }
 221                 }
 222                 {
 223                         struct sas_phy *phy = sas_phy->phy;
 224                         uint32_t *qp = (uint32_t *)(((char *)
 225                                 pm8001_ha->io_mem[2].memvirtaddr)
 226                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 227
 228                         phy->invalid_dword_count = qp[0];
 229                         phy->running_disparity_error_count = qp[1];
 230                         phy->loss_of_dword_sync_count = qp[3];
 231                         phy->phy_reset_problem_count = qp[4];
 232                 }
 233                 if (pm8001_ha->chip_id == chip_8001)
 234                         pm8001_bar4_shift(pm8001_ha, 0);
 235                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 236                 return 0;
 237         default:
 238                 rc = -EOPNOTSUPP;
 239         }
 240         msleep(300);
 241         return rc;
 242 }
 243
 244 /**
 245   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 246   * command to HBA.
 247   * @shost: the scsi host data.
 248   */
 249 void pm8001_scan_start(struct Scsi_Host *shost)
 250 {
 251         int i;
 252         struct pm8001_hba_info *pm8001_ha;
 253         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 254         pm8001_ha = sha->lldd_ha;
 255         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 256         if (pm8001_ha->chip_id == chip_8001)
 257                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 258         for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
 259                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 260 }
 261
 262 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 263 {
 264         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 265
 266         /* give the phy enabling interrupt event time to come in (1s
 267         * is empirically about all it takes) */
 268         if (time < HZ)
 269                 return 0;
 270         /* Wait for discovery to finish */
 271         sas_drain_work(ha);
 272         return 1;
 273 }
 274
 275 /**
 276   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 277   * @pm8001_ha: our hba card information
 278   * @ccb: the ccb which attached to smp task
 279   */
 280 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 281         struct pm8001_ccb_info *ccb)
 282 {
 283         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 284 }
 285
 286 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 287 {
 288         struct ata_queued_cmd *qc = task->uldd_task;
 289         if (qc) {
 290                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 291                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 292                         *tag = qc->tag;
 293                         return 1;
 294                 }
 295         }
 296         return 0;
 297 }
 298
 299 /**
 300   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 301   * @pm8001_ha: our hba card information
 302   * @ccb: the ccb which attached to sata task
 303   */
 304 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 305         struct pm8001_ccb_info *ccb)
 306 {
 307         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 308 }
 309
 310 /**
 311   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 312   * @pm8001_ha: our hba card information
 313   * @ccb: the ccb which attached to TM
 314   * @tmf: the task management IU
 315   */
 316 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 317         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 318 {
 319         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 320 }
 321
 322 /**
 323   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 324   * @pm8001_ha: our hba card information
 325   * @ccb: the ccb which attached to ssp task
 326   */
 327 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 328         struct pm8001_ccb_info *ccb)
 329 {
 330         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 331 }
 332
 333  /* Find the local port id that's attached to this device */
 334 static int sas_find_local_port_id(struct domain_device *dev)
 335 {
 336         struct domain_device *pdev = dev->parent;
 337
 338         /* Directly attached device */
 339         if (!pdev)
 340                 return dev->port->id;
 341         while (pdev) {
 342                 struct domain_device *pdev_p = pdev->parent;
 343                 if (!pdev_p)
 344                         return pdev->port->id;
 345                 pdev = pdev->parent;
 346         }
 347         return 0;
 348 }
 349
 350 /**
 351   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 352   * @task: the task to be execute.
 353   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 354   * we always execute one one time.
 355   * @gfp_flags: gfp_flags.
 356   * @is_tmf: if it is task management task.
 357   * @tmf: the task management IU
 358   */
 359 #define DEV_IS_GONE(pm8001_dev) \
 360         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 361 static int pm8001_task_exec(struct sas_task *task, const int num,
 362         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 363 {
 364         struct domain_device *dev = task->dev;
 365         struct pm8001_hba_info *pm8001_ha;
 366         struct pm8001_device *pm8001_dev;
 367         struct pm8001_port *port = NULL;
 368         struct sas_task *t = task;
 369         struct pm8001_ccb_info *ccb;
 370         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 371         u32 n = num;
 372         unsigned long flags = 0;
 373
 374         if (!dev->port) {
 375                 struct task_status_struct *tsm = &t->task_status;
 376                 tsm->resp = SAS_TASK_UNDELIVERED;
 377                 tsm->stat = SAS_PHY_DOWN;
 378                 if (dev->dev_type != SAS_SATA_DEV)
 379                         t->task_done(t);
 380                 return 0;
 381         }
 382         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 383         PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 384         spin_lock_irqsave(&pm8001_ha->lock, flags);
 385         do {
 386                 dev = t->dev;
 387                 pm8001_dev = dev->lldd_dev;
 388                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 389                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 390                         if (sas_protocol_ata(t->task_proto)) {
 391                                 struct task_status_struct *ts = &t->task_status;
 392                                 ts->resp = SAS_TASK_UNDELIVERED;
 393                                 ts->stat = SAS_PHY_DOWN;
 394
 395                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 396                                 t->task_done(t);
 397                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 398                                 if (n > 1)
 399                                         t = list_entry(t->list.next,
 400                                                         struct sas_task, list);
 401                                 continue;
 402                         } else {
 403                                 struct task_status_struct *ts = &t->task_status;
 404                                 ts->resp = SAS_TASK_UNDELIVERED;
 405                                 ts->stat = SAS_PHY_DOWN;
 406                                 t->task_done(t);
 407                                 if (n > 1)
 408                                         t = list_entry(t->list.next,
 409                                                         struct sas_task, list);
 410                                 continue;
 411                         }
 412                 }
 413                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 414                 if (rc)
 415                         goto err_out;
 416                 ccb = &pm8001_ha->ccb_info[tag];
 417
 418                 if (!sas_protocol_ata(t->task_proto)) {
 419                         if (t->num_scatter) {
 420                                 n_elem = dma_map_sg(pm8001_ha->dev,
 421                                         t->scatter,
 422                                         t->num_scatter,
 423                                         t->data_dir);
 424                                 if (!n_elem) {
 425                                         rc = -ENOMEM;
 426                                         goto err_out_tag;
 427                                 }
 428                         }
 429                 } else {
 430                         n_elem = t->num_scatter;
 431                 }
 432
 433                 t->lldd_task = ccb;
 434                 ccb->n_elem = n_elem;
 435                 ccb->ccb_tag = tag;
 436                 ccb->task = t;
 437                 switch (t->task_proto) {
 438                 case SAS_PROTOCOL_SMP:
 439                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 440                         break;
 441                 case SAS_PROTOCOL_SSP:
 442                         if (is_tmf)
 443                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 444                                         ccb, tmf);
 445                         else
 446                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 447                         break;
 448                 case SAS_PROTOCOL_SATA:
 449                 case SAS_PROTOCOL_STP:
 450                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 451                         break;
 452                 default:
 453                         dev_printk(KERN_ERR, pm8001_ha->dev,
 454                                 "unknown sas_task proto: 0x%x\n",
 455                                 t->task_proto);
 456                         rc = -EINVAL;
 457                         break;
 458                 }
 459
 460                 if (rc) {
 461                         PM8001_IO_DBG(pm8001_ha,
 462                                 pm8001_printk("rc is %x\n", rc));
 463                         goto err_out_tag;
 464                 }
 465                 /* TODO: select normal or high priority */
 466                 spin_lock(&t->task_state_lock);
 467                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 468                 spin_unlock(&t->task_state_lock);
 469                 pm8001_dev->running_req++;
 470                 if (n > 1)
 471                         t = list_entry(t->list.next, struct sas_task, list);
 472         } while (--n);
 473         rc = 0;
 474         goto out_done;
 475
 476 err_out_tag:
 477         pm8001_tag_free(pm8001_ha, tag);
 478 err_out:
 479         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 480         if (!sas_protocol_ata(t->task_proto))
 481                 if (n_elem)
 482                         dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem,
 483                                 t->data_dir);
 484 out_done:
 485         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 486         return rc;
 487 }
 488
 489 /**
 490   * pm8001_queue_command - register for upper layer used, all IO commands sent
 491   * to HBA are from this interface.
 492   * @task: the task to be execute.
 493   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 494   * we always execute one one time
 495   * @gfp_flags: gfp_flags
 496   */
 497 int pm8001_queue_command(struct sas_task *task, const int num,
 498                 gfp_t gfp_flags)
 499 {
 500         return pm8001_task_exec(task, num, gfp_flags, 0, NULL);
 501 }
 502
 503 void pm8001_ccb_free(struct pm8001_hba_info *pm8001_ha, u32 ccb_idx)
 504 {
 505         pm8001_tag_clear(pm8001_ha, ccb_idx);
 506 }
 507
 508 /**
 509   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 510   * @pm8001_ha: our hba card information
 511   * @ccb: the ccb which attached to ssp task
 512   * @task: the task to be free.
 513   * @ccb_idx: ccb index.
 514   */
 515 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 516         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 517 {
 518         if (!ccb->task)
 519                 return;
 520         if (!sas_protocol_ata(task->task_proto))
 521                 if (ccb->n_elem)
 522                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 523                                 task->num_scatter, task->data_dir);
 524
 525         switch (task->task_proto) {
 526         case SAS_PROTOCOL_SMP:
 527                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 528                         PCI_DMA_FROMDEVICE);
 529                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 530                         PCI_DMA_TODEVICE);
 531                 break;
 532
 533         case SAS_PROTOCOL_SATA:
 534         case SAS_PROTOCOL_STP:
 535         case SAS_PROTOCOL_SSP:
 536         default:
 537                 /* do nothing */
 538                 break;
 539         }
 540         task->lldd_task = NULL;
 541         ccb->task = NULL;
 542         ccb->ccb_tag = 0xFFFFFFFF;
 543         ccb->open_retry = 0;
 544         pm8001_ccb_free(pm8001_ha, ccb_idx);
 545 }
 546
 547  /**
 548   * pm8001_alloc_dev - find a empty pm8001_device
 549   * @pm8001_ha: our hba card information
 550   */
 551 struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 552 {
 553         u32 dev;
 554         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 555                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 556                         pm8001_ha->devices[dev].id = dev;
 557                         return &pm8001_ha->devices[dev];
 558                 }
 559         }
 560         if (dev == PM8001_MAX_DEVICES) {
 561                 PM8001_FAIL_DBG(pm8001_ha,
 562                         pm8001_printk("max support %d devices, ignore ..\n",
 563                         PM8001_MAX_DEVICES));
 564         }
 565         return NULL;
 566 }
 567 /**
 568   * pm8001_find_dev - find a matching pm8001_device
 569   * @pm8001_ha: our hba card information
 570   */
 571 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 572                                         u32 device_id)
 573 {
 574         u32 dev;
 575         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 576                 if (pm8001_ha->devices[dev].device_id == device_id)
 577                         return &pm8001_ha->devices[dev];
 578         }
 579         if (dev == PM8001_MAX_DEVICES) {
 580                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 581                                 "DEVICE FOUND !!!\n"));
 582         }
 583         return NULL;
 584 }
 585
 586 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 587 {
 588         u32 id = pm8001_dev->id;
 589         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 590         pm8001_dev->id = id;
 591         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 592         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 593         pm8001_dev->sas_device = NULL;
 594 }
 595
 596 /**
 597   * pm8001_dev_found_notify - libsas notify a device is found.
 598   * @dev: the device structure which sas layer used.
 599   *
 600   * when libsas find a sas domain device, it should tell the LLDD that
 601   * device is found, and then LLDD register this device to HBA firmware
 602   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 603   * device ID(according to device's sas address) and returned it to LLDD. From
 604   * now on, we communicate with HBA FW with the device ID which HBA assigned
 605   * rather than sas address. it is the necessary step for our HBA but it is
 606   * the optional for other HBA driver.
 607   */
 608 static int pm8001_dev_found_notify(struct domain_device *dev)
 609 {
 610         unsigned long flags = 0;
 611         int res = 0;
 612         struct pm8001_hba_info *pm8001_ha = NULL;
 613         struct domain_device *parent_dev = dev->parent;
 614         struct pm8001_device *pm8001_device;
 615         DECLARE_COMPLETION_ONSTACK(completion);
 616         u32 flag = 0;
 617         pm8001_ha = pm8001_find_ha_by_dev(dev);
 618         spin_lock_irqsave(&pm8001_ha->lock, flags);
 619
 620         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 621         if (!pm8001_device) {
 622                 res = -1;
 623                 goto found_out;
 624         }
 625         pm8001_device->sas_device = dev;
 626         dev->lldd_dev = pm8001_device;
 627         pm8001_device->dev_type = dev->dev_type;
 628         pm8001_device->dcompletion = &completion;
 629         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 630                 int phy_id;
 631                 struct ex_phy *phy;
 632                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 633                 phy_id++) {
 634                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 635                         if (SAS_ADDR(phy->attached_sas_addr)
 636                                 == SAS_ADDR(dev->sas_addr)) {
 637                                 pm8001_device->attached_phy = phy_id;
 638                                 break;
 639                         }
 640                 }
 641                 if (phy_id == parent_dev->ex_dev.num_phys) {
 642                         PM8001_FAIL_DBG(pm8001_ha,
 643                         pm8001_printk("Error: no attached dev:%016llx"
 644                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 645                                 SAS_ADDR(parent_dev->sas_addr)));
 646                         res = -1;
 647                 }
 648         } else {
 649                 if (dev->dev_type == SAS_SATA_DEV) {
 650                         pm8001_device->attached_phy =
 651                                 dev->rphy->identify.phy_identifier;
 652                                 flag = 1; /* directly sata*/
 653                 }
 654         } /*register this device to HBA*/
 655         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 656         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 657         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 658         wait_for_completion(&completion);
 659         if (dev->dev_type == SAS_END_DEVICE)
 660                 msleep(50);
 661         pm8001_ha->flags = PM8001F_RUN_TIME;
 662         return 0;
 663 found_out:
 664         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 665         return res;
 666 }
 667
 668 int pm8001_dev_found(struct domain_device *dev)
 669 {
 670         return pm8001_dev_found_notify(dev);
 671 }
 672
 673 void pm8001_task_done(struct sas_task *task)
 674 {
 675         if (!del_timer(&task->slow_task->timer))
 676                 return;
 677         complete(&task->slow_task->completion);
 678 }
 679
 680 static void pm8001_tmf_timedout(unsigned long data)
 681 {
 682         struct sas_task *task = (struct sas_task *)data;
 683
 684         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 685         complete(&task->slow_task->completion);
 686 }
 687
 688 #define PM8001_TASK_TIMEOUT 20
 689 /**
 690   * pm8001_exec_internal_tmf_task - execute some task management commands.
 691   * @dev: the wanted device.
 692   * @tmf: which task management wanted to be take.
 693   * @para_len: para_len.
 694   * @parameter: ssp task parameter.
 695   *
 696   * when errors or exception happened, we may want to do something, for example
 697   * abort the issued task which result in this execption, it is done by calling
 698   * this function, note it is also with the task execute interface.
 699   */
 700 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 701         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 702 {
 703         int res, retry;
 704         struct sas_task *task = NULL;
 705         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 706         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 707         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 708
 709         for (retry = 0; retry < 3; retry++) {
 710                 task = sas_alloc_slow_task(GFP_KERNEL);
 711                 if (!task)
 712                         return -ENOMEM;
 713
 714                 task->dev = dev;
 715                 task->task_proto = dev->tproto;
 716                 memcpy(&task->ssp_task, parameter, para_len);
 717                 task->task_done = pm8001_task_done;
 718                 task->slow_task->timer.data = (unsigned long)task;
 719                 task->slow_task->timer.function = pm8001_tmf_timedout;
 720                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 721                 add_timer(&task->slow_task->timer);
 722
 723                 res = pm8001_task_exec(task, 1, GFP_KERNEL, 1, tmf);
 724
 725                 if (res) {
 726                         del_timer(&task->slow_task->timer);
 727                         PM8001_FAIL_DBG(pm8001_ha,
 728                                 pm8001_printk("Executing internal task "
 729                                 "failed\n"));
 730                         goto ex_err;
 731                 }
 732                 wait_for_completion(&task->slow_task->completion);
 733                 if (pm8001_ha->chip_id != chip_8001) {
 734                         pm8001_dev->setds_completion = &completion_setstate;
 735                                 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 736                                         pm8001_dev, 0x01);
 737                         wait_for_completion(&completion_setstate);
 738                 }
 739                 res = -TMF_RESP_FUNC_FAILED;
 740                 /* Even TMF timed out, return direct. */
 741                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 742                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 743                                 PM8001_FAIL_DBG(pm8001_ha,
 744                                         pm8001_printk("TMF task[%x]timeout.\n",
 745                                         tmf->tmf));
 746                                 goto ex_err;
 747                         }
 748                 }
 749
 750                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 751                         task->task_status.stat == SAM_STAT_GOOD) {
 752                         res = TMF_RESP_FUNC_COMPLETE;
 753                         break;
 754                 }
 755
 756                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 757                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 758                         /* no error, but return the number of bytes of
 759                         * underrun */
 760                         res = task->task_status.residual;
 761                         break;
 762                 }
 763
 764                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 765                         task->task_status.stat == SAS_DATA_OVERRUN) {
 766                         PM8001_FAIL_DBG(pm8001_ha,
 767                                 pm8001_printk("Blocked task error.\n"));
 768                         res = -EMSGSIZE;
 769                         break;
 770                 } else {
 771                         PM8001_EH_DBG(pm8001_ha,
 772                                 pm8001_printk(" Task to dev %016llx response:"
 773                                 "0x%x status 0x%x\n",
 774                                 SAS_ADDR(dev->sas_addr),
 775                                 task->task_status.resp,
 776                                 task->task_status.stat));
 777                         sas_free_task(task);
 778                         task = NULL;
 779                 }
 780         }
 781 ex_err:
 782         BUG_ON(retry == 3 && task != NULL);
 783         sas_free_task(task);
 784         return res;
 785 }
 786
 787 static int
 788 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 789         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 790         u32 task_tag)
 791 {
 792         int res, retry;
 793         u32 ccb_tag;
 794         struct pm8001_ccb_info *ccb;
 795         struct sas_task *task = NULL;
 796
 797         for (retry = 0; retry < 3; retry++) {
 798                 task = sas_alloc_slow_task(GFP_KERNEL);
 799                 if (!task)
 800                         return -ENOMEM;
 801
 802                 task->dev = dev;
 803                 task->task_proto = dev->tproto;
 804                 task->task_done = pm8001_task_done;
 805                 task->slow_task->timer.data = (unsigned long)task;
 806                 task->slow_task->timer.function = pm8001_tmf_timedout;
 807                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 808                 add_timer(&task->slow_task->timer);
 809
 810                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 811                 if (res)
 812                         return res;
 813                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 814                 ccb->device = pm8001_dev;
 815                 ccb->ccb_tag = ccb_tag;
 816                 ccb->task = task;
 817
 818                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 819                         pm8001_dev, flag, task_tag, ccb_tag);
 820
 821                 if (res) {
 822                         del_timer(&task->slow_task->timer);
 823                         PM8001_FAIL_DBG(pm8001_ha,
 824                                 pm8001_printk("Executing internal task "
 825                                 "failed\n"));
 826                         goto ex_err;
 827                 }
 828                 wait_for_completion(&task->slow_task->completion);
 829                 res = TMF_RESP_FUNC_FAILED;
 830                 /* Even TMF timed out, return direct. */
 831                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 832                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 833                                 PM8001_FAIL_DBG(pm8001_ha,
 834                                         pm8001_printk("TMF task timeout.\n"));
 835                                 goto ex_err;
 836                         }
 837                 }
 838
 839                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 840                         task->task_status.stat == SAM_STAT_GOOD) {
 841                         res = TMF_RESP_FUNC_COMPLETE;
 842                         break;
 843
 844                 } else {
 845                         PM8001_EH_DBG(pm8001_ha,
 846                                 pm8001_printk(" Task to dev %016llx response: "
 847                                         "0x%x status 0x%x\n",
 848                                 SAS_ADDR(dev->sas_addr),
 849                                 task->task_status.resp,
 850                                 task->task_status.stat));
 851                         sas_free_task(task);
 852                         task = NULL;
 853                 }
 854         }
 855 ex_err:
 856         BUG_ON(retry == 3 && task != NULL);
 857         sas_free_task(task);
 858         return res;
 859 }
 860
 861 /**
 862   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 863   * @dev: the device structure which sas layer used.
 864   */
 865 static void pm8001_dev_gone_notify(struct domain_device *dev)
 866 {
 867         unsigned long flags = 0;
 868         u32 tag;
 869         struct pm8001_hba_info *pm8001_ha;
 870         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 871
 872         pm8001_ha = pm8001_find_ha_by_dev(dev);
 873         spin_lock_irqsave(&pm8001_ha->lock, flags);
 874         pm8001_tag_alloc(pm8001_ha, &tag);
 875         if (pm8001_dev) {
 876                 u32 device_id = pm8001_dev->device_id;
 877
 878                 PM8001_DISC_DBG(pm8001_ha,
 879                         pm8001_printk("found dev[%d:%x] is gone.\n",
 880                         pm8001_dev->device_id, pm8001_dev->dev_type));
 881                 if (pm8001_dev->running_req) {
 882                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 883                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 884                                 dev, 1, 0);
 885                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 886                 }
 887                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 888                 pm8001_free_dev(pm8001_dev);
 889         } else {
 890                 PM8001_DISC_DBG(pm8001_ha,
 891                         pm8001_printk("Found dev has gone.\n"));
 892         }
 893         dev->lldd_dev = NULL;
 894         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 895 }
 896
 897 void pm8001_dev_gone(struct domain_device *dev)
 898 {
 899         pm8001_dev_gone_notify(dev);
 900 }
 901
 902 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 903         u8 *lun, struct pm8001_tmf_task *tmf)
 904 {
 905         struct sas_ssp_task ssp_task;
 906         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 907                 return TMF_RESP_FUNC_ESUPP;
 908
 909         strncpy((u8 *)&ssp_task.LUN, lun, 8);
 910         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 911                 tmf);
 912 }
 913
 914 /* retry commands by ha, by task and/or by device */
 915 void pm8001_open_reject_retry(
 916         struct pm8001_hba_info *pm8001_ha,
 917         struct sas_task *task_to_close,
 918         struct pm8001_device *device_to_close)
 919 {
 920         int i;
 921         unsigned long flags;
 922
 923         if (pm8001_ha == NULL)
 924                 return;
 925
 926         spin_lock_irqsave(&pm8001_ha->lock, flags);
 927
 928         for (i = 0; i < PM8001_MAX_CCB; i++) {
 929                 struct sas_task *task;
 930                 struct task_status_struct *ts;
 931                 struct pm8001_device *pm8001_dev;
 932                 unsigned long flags1;
 933                 u32 tag;
 934                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 935
 936                 pm8001_dev = ccb->device;
 937                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 938                         continue;
 939                 if (!device_to_close) {
 940                         uintptr_t d = (uintptr_t)pm8001_dev
 941                                         - (uintptr_t)&pm8001_ha->devices;
 942                         if (((d % sizeof(*pm8001_dev)) != 0)
 943                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 944                                 continue;
 945                 } else if (pm8001_dev != device_to_close)
 946                         continue;
 947                 tag = ccb->ccb_tag;
 948                 if (!tag || (tag == 0xFFFFFFFF))
 949                         continue;
 950                 task = ccb->task;
 951                 if (!task || !task->task_done)
 952                         continue;
 953                 if (task_to_close && (task != task_to_close))
 954                         continue;
 955                 ts = &task->task_status;
 956                 ts->resp = SAS_TASK_COMPLETE;
 957                 /* Force the midlayer to retry */
 958                 ts->stat = SAS_OPEN_REJECT;
 959                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 960                 if (pm8001_dev)
 961                         pm8001_dev->running_req--;
 962                 spin_lock_irqsave(&task->task_state_lock, flags1);
 963                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 964                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 965                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 966                 if (unlikely((task->task_state_flags
 967                                 & SAS_TASK_STATE_ABORTED))) {
 968                         spin_unlock_irqrestore(&task->task_state_lock,
 969                                 flags1);
 970                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 971                 } else {
 972                         spin_unlock_irqrestore(&task->task_state_lock,
 973                                 flags1);
 974                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 975                         mb();/* in order to force CPU ordering */
 976                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 977                         task->task_done(task);
 978                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 979                 }
 980         }
 981
 982         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 983 }
 984
 985 /**
 986   * Standard mandates link reset for ATA  (type 0) and hard reset for
 987   * SSP (type 1) , only for RECOVERY
 988   */
 989 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 990 {
 991         int rc = TMF_RESP_FUNC_FAILED;
 992         struct pm8001_device *pm8001_dev;
 993         struct pm8001_hba_info *pm8001_ha;
 994         struct sas_phy *phy;
 995
 996         if (!dev || !dev->lldd_dev)
 997                 return -ENODEV;
 998
 999         pm8001_dev = dev->lldd_dev;
1000         pm8001_ha = pm8001_find_ha_by_dev(dev);
1001         phy = sas_get_local_phy(dev);
1002
1003         if (dev_is_sata(dev)) {
1004                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1005                 if (scsi_is_sas_phy_local(phy)) {
1006                         rc = 0;
1007                         goto out;
1008                 }
1009                 rc = sas_phy_reset(phy, 1);
1010                 msleep(2000);
1011                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1012                         dev, 1, 0);
1013                 pm8001_dev->setds_completion = &completion_setstate;
1014                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1015                         pm8001_dev, 0x01);
1016                 wait_for_completion(&completion_setstate);
1017         } else {
1018                 rc = sas_phy_reset(phy, 1);
1019                 msleep(2000);
1020         }
1021         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1022                 pm8001_dev->device_id, rc));
1023  out:
1024         sas_put_local_phy(phy);
1025         return rc;
1026 }
1027
1028 /*
1029 * This function handle the IT_NEXUS_XXX event or completion
1030 * status code for SSP/SATA/SMP I/O request.
1031 */
1032 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1033 {
1034         int rc = TMF_RESP_FUNC_FAILED;
1035         struct pm8001_device *pm8001_dev;
1036         struct pm8001_hba_info *pm8001_ha;
1037         struct sas_phy *phy;
1038         u32 device_id = 0;
1039
1040         if (!dev || !dev->lldd_dev)
1041                 return -1;
1042
1043         pm8001_dev = dev->lldd_dev;
1044         device_id = pm8001_dev->device_id;
1045         pm8001_ha = pm8001_find_ha_by_dev(dev);
1046
1047         PM8001_EH_DBG(pm8001_ha,
1048                         pm8001_printk("I_T_Nexus handler invoked !!"));
1049
1050         phy = sas_get_local_phy(dev);
1051
1052         if (dev_is_sata(dev)) {
1053                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1054                 if (scsi_is_sas_phy_local(phy)) {
1055                         rc = 0;
1056                         goto out;
1057                 }
1058                 /* send internal ssp/sata/smp abort command to FW */
1059                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1060                                                         dev, 1, 0);
1061                 msleep(100);
1062
1063                 /* deregister the target device */
1064                 pm8001_dev_gone_notify(dev);
1065                 msleep(200);
1066
1067                 /*send phy reset to hard reset target */
1068                 rc = sas_phy_reset(phy, 1);
1069                 msleep(2000);
1070                 pm8001_dev->setds_completion = &completion_setstate;
1071
1072                 wait_for_completion(&completion_setstate);
1073         } else {
1074                 /* send internal ssp/sata/smp abort command to FW */
1075                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1076                                                         dev, 1, 0);
1077                 msleep(100);
1078
1079                 /* deregister the target device */
1080                 pm8001_dev_gone_notify(dev);
1081                 msleep(200);
1082
1083                 /*send phy reset to hard reset target */
1084                 rc = sas_phy_reset(phy, 1);
1085                 msleep(2000);
1086         }
1087         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1088                 pm8001_dev->device_id, rc));
1089 out:
1090         sas_put_local_phy(phy);
1091
1092         return rc;
1093 }
1094 /* mandatory SAM-3, the task reset the specified LUN*/
1095 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1096 {
1097         int rc = TMF_RESP_FUNC_FAILED;
1098         struct pm8001_tmf_task tmf_task;
1099         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1100         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1101         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1102         if (dev_is_sata(dev)) {
1103                 struct sas_phy *phy = sas_get_local_phy(dev);
1104                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1105                         dev, 1, 0);
1106                 rc = sas_phy_reset(phy, 1);
1107                 sas_put_local_phy(phy);
1108                 pm8001_dev->setds_completion = &completion_setstate;
1109                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1110                         pm8001_dev, 0x01);
1111                 wait_for_completion(&completion_setstate);
1112         } else {
1113                 tmf_task.tmf = TMF_LU_RESET;
1114                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1115         }
1116         /* If failed, fall-through I_T_Nexus reset */
1117         PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1118                 pm8001_dev->device_id, rc));
1119         return rc;
1120 }
1121
1122 /* optional SAM-3 */
1123 int pm8001_query_task(struct sas_task *task)
1124 {
1125         u32 tag = 0xdeadbeef;
1126         int i = 0;
1127         struct scsi_lun lun;
1128         struct pm8001_tmf_task tmf_task;
1129         int rc = TMF_RESP_FUNC_FAILED;
1130         if (unlikely(!task || !task->lldd_task || !task->dev))
1131                 return rc;
1132
1133         if (task->task_proto & SAS_PROTOCOL_SSP) {
1134                 struct scsi_cmnd *cmnd = task->uldd_task;
1135                 struct domain_device *dev = task->dev;
1136                 struct pm8001_hba_info *pm8001_ha =
1137                         pm8001_find_ha_by_dev(dev);
1138
1139                 int_to_scsilun(cmnd->device->lun, &lun);
1140                 rc = pm8001_find_tag(task, &tag);
1141                 if (rc == 0) {
1142                         rc = TMF_RESP_FUNC_FAILED;
1143                         return rc;
1144                 }
1145                 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1146                 for (i = 0; i < 16; i++)
1147                         printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1148                 printk(KERN_INFO "]\n");
1149                 tmf_task.tmf =  TMF_QUERY_TASK;
1150                 tmf_task.tag_of_task_to_be_managed = tag;
1151
1152                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1153                 switch (rc) {
1154                 /* The task is still in Lun, release it then */
1155                 case TMF_RESP_FUNC_SUCC:
1156                         PM8001_EH_DBG(pm8001_ha,
1157                                 pm8001_printk("The task is still in Lun\n"));
1158                         break;
1159                 /* The task is not in Lun or failed, reset the phy */
1160                 case TMF_RESP_FUNC_FAILED:
1161                 case TMF_RESP_FUNC_COMPLETE:
1162                         PM8001_EH_DBG(pm8001_ha,
1163                         pm8001_printk("The task is not in Lun or failed,"
1164                         " reset the phy\n"));
1165                         break;
1166                 }
1167         }
1168         pm8001_printk(":rc= %d\n", rc);
1169         return rc;
1170 }
1171
1172 /*  mandatory SAM-3, still need free task/ccb info, abord the specified task */
1173 int pm8001_abort_task(struct sas_task *task)
1174 {
1175         unsigned long flags;
1176         u32 tag = 0xdeadbeef;
1177         u32 device_id;
1178         struct domain_device *dev ;
1179         struct pm8001_hba_info *pm8001_ha = NULL;
1180         struct pm8001_ccb_info *ccb;
1181         struct scsi_lun lun;
1182         struct pm8001_device *pm8001_dev;
1183         struct pm8001_tmf_task tmf_task;
1184         int rc = TMF_RESP_FUNC_FAILED;
1185         if (unlikely(!task || !task->lldd_task || !task->dev))
1186                 return rc;
1187         spin_lock_irqsave(&task->task_state_lock, flags);
1188         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1189                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1190                 rc = TMF_RESP_FUNC_COMPLETE;
1191                 goto out;
1192         }
1193         spin_unlock_irqrestore(&task->task_state_lock, flags);
1194         if (task->task_proto & SAS_PROTOCOL_SSP) {
1195                 struct scsi_cmnd *cmnd = task->uldd_task;
1196                 dev = task->dev;
1197                 ccb = task->lldd_task;
1198                 pm8001_dev = dev->lldd_dev;
1199                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1200                 int_to_scsilun(cmnd->device->lun, &lun);
1201                 rc = pm8001_find_tag(task, &tag);
1202                 if (rc == 0) {
1203                         printk(KERN_INFO "No such tag in %s\n", __func__);
1204                         rc = TMF_RESP_FUNC_FAILED;
1205                         return rc;
1206                 }
1207                 device_id = pm8001_dev->device_id;
1208                 PM8001_EH_DBG(pm8001_ha,
1209                         pm8001_printk("abort io to deviceid= %d\n", device_id));
1210                 tmf_task.tmf = TMF_ABORT_TASK;
1211                 tmf_task.tag_of_task_to_be_managed = tag;
1212                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1213                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1214                         pm8001_dev->sas_device, 0, tag);
1215         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1216                 task->task_proto & SAS_PROTOCOL_STP) {
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         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1229                 /* SMP */
1230                 dev = task->dev;
1231                 pm8001_dev = dev->lldd_dev;
1232                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1233                 rc = pm8001_find_tag(task, &tag);
1234                 if (rc == 0) {
1235                         printk(KERN_INFO "No such tag in %s\n", __func__);
1236                         rc = TMF_RESP_FUNC_FAILED;
1237                         return rc;
1238                 }
1239                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1240                         pm8001_dev->sas_device, 0, tag);
1241
1242         }
1243 out:
1244         if (rc != TMF_RESP_FUNC_COMPLETE)
1245                 pm8001_printk("rc= %d\n", rc);
1246         return rc;
1247 }
1248
1249 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1250 {
1251         int rc = TMF_RESP_FUNC_FAILED;
1252         struct pm8001_tmf_task tmf_task;
1253
1254         tmf_task.tmf = TMF_ABORT_TASK_SET;
1255         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1256         return rc;
1257 }
1258
1259 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1260 {
1261         int rc = TMF_RESP_FUNC_FAILED;
1262         struct pm8001_tmf_task tmf_task;
1263
1264         tmf_task.tmf = TMF_CLEAR_ACA;
1265         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1266
1267         return rc;
1268 }
1269
1270 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1271 {
1272         int rc = TMF_RESP_FUNC_FAILED;
1273         struct pm8001_tmf_task tmf_task;
1274         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1275         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1276
1277         PM8001_EH_DBG(pm8001_ha,
1278                 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1279                 pm8001_dev->device_id));
1280         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1281         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1282         return rc;
1283 }
1284