drivers/scsi/pm8001/pm8001_sas.c

   1 /*
   2  * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
   3  *
   4  * Copyright (c) 2008-2009 USI Co., Ltd.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification.
  13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14  *    substantially similar to the "NO WARRANTY" disclaimer below
  15  *    ("Disclaimer") and any redistribution must be conditioned upon
  16  *    including a substantially similar Disclaimer requirement for further
  17  *    binary redistribution.
  18  * 3. Neither the names of the above-listed copyright holders nor the names
  19  *    of any contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * Alternatively, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2 as published by the Free
  24  * Software Foundation.
  25  *
  26  * NO WARRANTY
  27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  30  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  36  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGES.
  38  *
  39  */
  40
  41 #include <linux/slab.h>
  42 #include "pm8001_sas.h"
  43
  44 /**
  45  * pm8001_find_tag - from sas task to find out  tag that belongs to this task
  46  * @task: the task sent to the LLDD
  47  * @tag: the found tag associated with the task
  48  */
  49 static int pm8001_find_tag(struct sas_task *task, u32 *tag)
  50 {
  51         if (task->lldd_task) {
  52                 struct pm8001_ccb_info *ccb;
  53                 ccb = task->lldd_task;
  54                 *tag = ccb->ccb_tag;
  55                 return 1;
  56         }
  57         return 0;
  58 }
  59
  60 /**
  61   * pm8001_tag_free - free the no more needed tag
  62   * @pm8001_ha: our hba struct
  63   * @tag: the found tag associated with the task
  64   */
  65 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
  66 {
  67         void *bitmap = pm8001_ha->tags;
  68         clear_bit(tag, bitmap);
  69 }
  70
  71 /**
  72   * pm8001_tag_alloc - allocate a empty tag for task used.
  73   * @pm8001_ha: our hba struct
  74   * @tag_out: the found empty tag .
  75   */
  76 inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
  77 {
  78         unsigned int tag;
  79         void *bitmap = pm8001_ha->tags;
  80         unsigned long flags;
  81
  82         spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
  83         tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
  84         if (tag >= pm8001_ha->tags_num) {
  85                 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  86                 return -SAS_QUEUE_FULL;
  87         }
  88         set_bit(tag, bitmap);
  89         spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  90         *tag_out = tag;
  91         return 0;
  92 }
  93
  94 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
  95 {
  96         int i;
  97         for (i = 0; i < pm8001_ha->tags_num; ++i)
  98                 pm8001_tag_free(pm8001_ha, i);
  99 }
 100
 101  /**
 102   * pm8001_mem_alloc - allocate memory for pm8001.
 103   * @pdev: pci device.
 104   * @virt_addr: the allocated virtual address
 105   * @pphys_addr_hi: the physical address high byte address.
 106   * @pphys_addr_lo: the physical address low byte address.
 107   * @mem_size: memory size.
 108   */
 109 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
 110         dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
 111         u32 *pphys_addr_lo, u32 mem_size, u32 align)
 112 {
 113         caddr_t mem_virt_alloc;
 114         dma_addr_t mem_dma_handle;
 115         u64 phys_align;
 116         u64 align_offset = 0;
 117         if (align)
 118                 align_offset = (dma_addr_t)align - 1;
 119         mem_virt_alloc = pci_zalloc_consistent(pdev, mem_size + align,
 120                                                &mem_dma_handle);
 121         if (!mem_virt_alloc) {
 122                 pm8001_printk("memory allocation error\n");
 123                 return -1;
 124         }
 125         *pphys_addr = mem_dma_handle;
 126         phys_align = (*pphys_addr + align_offset) & ~align_offset;
 127         *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
 128         *pphys_addr_hi = upper_32_bits(phys_align);
 129         *pphys_addr_lo = lower_32_bits(phys_align);
 130         return 0;
 131 }
 132 /**
 133   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 134   * find out our hba struct.
 135   * @dev: the domain device which from sas layer.
 136   */
 137 static
 138 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 139 {
 140         struct sas_ha_struct *sha = dev->port->ha;
 141         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 142         return pm8001_ha;
 143 }
 144
 145 /**
 146   * pm8001_phy_control - this function should be registered to
 147   * sas_domain_function_template to provide libsas used, note: this is just
 148   * control the HBA phy rather than other expander phy if you want control
 149   * other phy, you should use SMP command.
 150   * @sas_phy: which phy in HBA phys.
 151   * @func: the operation.
 152   * @funcdata: always NULL.
 153   */
 154 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 155         void *funcdata)
 156 {
 157         int rc = 0, phy_id = sas_phy->id;
 158         struct pm8001_hba_info *pm8001_ha = NULL;
 159         struct sas_phy_linkrates *rates;
 160         DECLARE_COMPLETION_ONSTACK(completion);
 161         unsigned long flags;
 162         pm8001_ha = sas_phy->ha->lldd_ha;
 163         pm8001_ha->phy[phy_id].enable_completion = &completion;
 164         switch (func) {
 165         case PHY_FUNC_SET_LINK_RATE:
 166                 rates = funcdata;
 167                 if (rates->minimum_linkrate) {
 168                         pm8001_ha->phy[phy_id].minimum_linkrate =
 169                                 rates->minimum_linkrate;
 170                 }
 171                 if (rates->maximum_linkrate) {
 172                         pm8001_ha->phy[phy_id].maximum_linkrate =
 173                                 rates->maximum_linkrate;
 174                 }
 175                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 176                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 177                         wait_for_completion(&completion);
 178                 }
 179                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 180                                               PHY_LINK_RESET);
 181                 break;
 182         case PHY_FUNC_HARD_RESET:
 183                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 184                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 185                         wait_for_completion(&completion);
 186                 }
 187                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 188                                               PHY_HARD_RESET);
 189                 break;
 190         case PHY_FUNC_LINK_RESET:
 191                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 192                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 193                         wait_for_completion(&completion);
 194                 }
 195                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 196                                               PHY_LINK_RESET);
 197                 break;
 198         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 199                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 200                                               PHY_LINK_RESET);
 201                 break;
 202         case PHY_FUNC_DISABLE:
 203                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 204                 break;
 205         case PHY_FUNC_GET_EVENTS:
 206                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 207                 if (pm8001_ha->chip_id == chip_8001) {
 208                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 209                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 210                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 211                                 return -EINVAL;
 212                         }
 213                 }
 214                 {
 215                         struct sas_phy *phy = sas_phy->phy;
 216                         uint32_t *qp = (uint32_t *)(((char *)
 217                                 pm8001_ha->io_mem[2].memvirtaddr)
 218                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 219
 220                         phy->invalid_dword_count = qp[0];
 221                         phy->running_disparity_error_count = qp[1];
 222                         phy->loss_of_dword_sync_count = qp[3];
 223                         phy->phy_reset_problem_count = qp[4];
 224                 }
 225                 if (pm8001_ha->chip_id == chip_8001)
 226                         pm8001_bar4_shift(pm8001_ha, 0);
 227                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 228                 return 0;
 229         default:
 230                 rc = -EOPNOTSUPP;
 231         }
 232         msleep(300);
 233         return rc;
 234 }
 235
 236 /**
 237   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 238   * command to HBA.
 239   * @shost: the scsi host data.
 240   */
 241 void pm8001_scan_start(struct Scsi_Host *shost)
 242 {
 243         int i;
 244         struct pm8001_hba_info *pm8001_ha;
 245         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 246         pm8001_ha = sha->lldd_ha;
 247         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 248         if (pm8001_ha->chip_id == chip_8001)
 249                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 250         for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
 251                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 252 }
 253
 254 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 255 {
 256         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 257
 258         /* give the phy enabling interrupt event time to come in (1s
 259         * is empirically about all it takes) */
 260         if (time < HZ)
 261                 return 0;
 262         /* Wait for discovery to finish */
 263         sas_drain_work(ha);
 264         return 1;
 265 }
 266
 267 /**
 268   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 269   * @pm8001_ha: our hba card information
 270   * @ccb: the ccb which attached to smp task
 271   */
 272 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 273         struct pm8001_ccb_info *ccb)
 274 {
 275         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 276 }
 277
 278 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 279 {
 280         struct ata_queued_cmd *qc = task->uldd_task;
 281         if (qc) {
 282                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 283                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 284                         *tag = qc->tag;
 285                         return 1;
 286                 }
 287         }
 288         return 0;
 289 }
 290
 291 /**
 292   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 293   * @pm8001_ha: our hba card information
 294   * @ccb: the ccb which attached to sata task
 295   */
 296 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 297         struct pm8001_ccb_info *ccb)
 298 {
 299         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 300 }
 301
 302 /**
 303   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 304   * @pm8001_ha: our hba card information
 305   * @ccb: the ccb which attached to TM
 306   * @tmf: the task management IU
 307   */
 308 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 309         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 310 {
 311         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 312 }
 313
 314 /**
 315   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 316   * @pm8001_ha: our hba card information
 317   * @ccb: the ccb which attached to ssp task
 318   */
 319 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 320         struct pm8001_ccb_info *ccb)
 321 {
 322         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 323 }
 324
 325  /* Find the local port id that's attached to this device */
 326 static int sas_find_local_port_id(struct domain_device *dev)
 327 {
 328         struct domain_device *pdev = dev->parent;
 329
 330         /* Directly attached device */
 331         if (!pdev)
 332                 return dev->port->id;
 333         while (pdev) {
 334                 struct domain_device *pdev_p = pdev->parent;
 335                 if (!pdev_p)
 336                         return pdev->port->id;
 337                 pdev = pdev->parent;
 338         }
 339         return 0;
 340 }
 341
 342 /**
 343   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 344   * @task: the task to be execute.
 345   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 346   * we always execute one one time.
 347   * @gfp_flags: gfp_flags.
 348   * @is_tmf: if it is task management task.
 349   * @tmf: the task management IU
 350   */
 351 #define DEV_IS_GONE(pm8001_dev) \
 352         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 353 static int pm8001_task_exec(struct sas_task *task, const int num,
 354         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 355 {
 356         struct domain_device *dev = task->dev;
 357         struct pm8001_hba_info *pm8001_ha;
 358         struct pm8001_device *pm8001_dev;
 359         struct pm8001_port *port = NULL;
 360         struct sas_task *t = task;
 361         struct pm8001_ccb_info *ccb;
 362         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 363         u32 n = num;
 364         unsigned long flags = 0;
 365
 366         if (!dev->port) {
 367                 struct task_status_struct *tsm = &t->task_status;
 368                 tsm->resp = SAS_TASK_UNDELIVERED;
 369                 tsm->stat = SAS_PHY_DOWN;
 370                 if (dev->dev_type != SAS_SATA_DEV)
 371                         t->task_done(t);
 372                 return 0;
 373         }
 374         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 375         PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 376         spin_lock_irqsave(&pm8001_ha->lock, flags);
 377         do {
 378                 dev = t->dev;
 379                 pm8001_dev = dev->lldd_dev;
 380                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 381                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 382                         if (sas_protocol_ata(t->task_proto)) {
 383                                 struct task_status_struct *ts = &t->task_status;
 384                                 ts->resp = SAS_TASK_UNDELIVERED;
 385                                 ts->stat = SAS_PHY_DOWN;
 386
 387                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 388                                 t->task_done(t);
 389                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 390                                 if (n > 1)
 391                                         t = list_entry(t->list.next,
 392                                                         struct sas_task, list);
 393                                 continue;
 394                         } else {
 395                                 struct task_status_struct *ts = &t->task_status;
 396                                 ts->resp = SAS_TASK_UNDELIVERED;
 397                                 ts->stat = SAS_PHY_DOWN;
 398                                 t->task_done(t);
 399                                 if (n > 1)
 400                                         t = list_entry(t->list.next,
 401                                                         struct sas_task, list);
 402                                 continue;
 403                         }
 404                 }
 405                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 406                 if (rc)
 407                         goto err_out;
 408                 ccb = &pm8001_ha->ccb_info[tag];
 409
 410                 if (!sas_protocol_ata(t->task_proto)) {
 411                         if (t->num_scatter) {
 412                                 n_elem = dma_map_sg(pm8001_ha->dev,
 413                                         t->scatter,
 414                                         t->num_scatter,
 415                                         t->data_dir);
 416                                 if (!n_elem) {
 417                                         rc = -ENOMEM;
 418                                         goto err_out_tag;
 419                                 }
 420                         }
 421                 } else {
 422                         n_elem = t->num_scatter;
 423                 }
 424
 425                 t->lldd_task = ccb;
 426                 ccb->n_elem = n_elem;
 427                 ccb->ccb_tag = tag;
 428                 ccb->task = t;
 429                 ccb->device = pm8001_dev;
 430                 switch (t->task_proto) {
 431                 case SAS_PROTOCOL_SMP:
 432                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 433                         break;
 434                 case SAS_PROTOCOL_SSP:
 435                         if (is_tmf)
 436                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 437                                         ccb, tmf);
 438                         else
 439                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 440                         break;
 441                 case SAS_PROTOCOL_SATA:
 442                 case SAS_PROTOCOL_STP:
 443                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 444                         break;
 445                 default:
 446                         dev_printk(KERN_ERR, pm8001_ha->dev,
 447                                 "unknown sas_task proto: 0x%x\n",
 448                                 t->task_proto);
 449                         rc = -EINVAL;
 450                         break;
 451                 }
 452
 453                 if (rc) {
 454                         PM8001_IO_DBG(pm8001_ha,
 455                                 pm8001_printk("rc is %x\n", rc));
 456                         goto err_out_tag;
 457                 }
 458                 /* TODO: select normal or high priority */
 459                 spin_lock(&t->task_state_lock);
 460                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 461                 spin_unlock(&t->task_state_lock);
 462                 pm8001_dev->running_req++;
 463                 if (n > 1)
 464                         t = list_entry(t->list.next, struct sas_task, list);
 465         } while (--n);
 466         rc = 0;
 467         goto out_done;
 468
 469 err_out_tag:
 470         pm8001_tag_free(pm8001_ha, tag);
 471 err_out:
 472         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 473         if (!sas_protocol_ata(t->task_proto))
 474                 if (n_elem)
 475                         dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem,
 476                                 t->data_dir);
 477 out_done:
 478         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 479         return rc;
 480 }
 481
 482 /**
 483   * pm8001_queue_command - register for upper layer used, all IO commands sent
 484   * to HBA are from this interface.
 485   * @task: the task to be execute.
 486   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 487   * we always execute one one time
 488   * @gfp_flags: gfp_flags
 489   */
 490 int pm8001_queue_command(struct sas_task *task, const int num,
 491                 gfp_t gfp_flags)
 492 {
 493         return pm8001_task_exec(task, num, gfp_flags, 0, NULL);
 494 }
 495
 496 /**
 497   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 498   * @pm8001_ha: our hba card information
 499   * @ccb: the ccb which attached to ssp task
 500   * @task: the task to be free.
 501   * @ccb_idx: ccb index.
 502   */
 503 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 504         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 505 {
 506         if (!ccb->task)
 507                 return;
 508         if (!sas_protocol_ata(task->task_proto))
 509                 if (ccb->n_elem)
 510                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 511                                 task->num_scatter, task->data_dir);
 512
 513         switch (task->task_proto) {
 514         case SAS_PROTOCOL_SMP:
 515                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 516                         PCI_DMA_FROMDEVICE);
 517                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 518                         PCI_DMA_TODEVICE);
 519                 break;
 520
 521         case SAS_PROTOCOL_SATA:
 522         case SAS_PROTOCOL_STP:
 523         case SAS_PROTOCOL_SSP:
 524         default:
 525                 /* do nothing */
 526                 break;
 527         }
 528         task->lldd_task = NULL;
 529         ccb->task = NULL;
 530         ccb->ccb_tag = 0xFFFFFFFF;
 531         ccb->open_retry = 0;
 532         pm8001_tag_free(pm8001_ha, ccb_idx);
 533 }
 534
 535  /**
 536   * pm8001_alloc_dev - find a empty pm8001_device
 537   * @pm8001_ha: our hba card information
 538   */
 539 struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 540 {
 541         u32 dev;
 542         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 543                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 544                         pm8001_ha->devices[dev].id = dev;
 545                         return &pm8001_ha->devices[dev];
 546                 }
 547         }
 548         if (dev == PM8001_MAX_DEVICES) {
 549                 PM8001_FAIL_DBG(pm8001_ha,
 550                         pm8001_printk("max support %d devices, ignore ..\n",
 551                         PM8001_MAX_DEVICES));
 552         }
 553         return NULL;
 554 }
 555 /**
 556   * pm8001_find_dev - find a matching pm8001_device
 557   * @pm8001_ha: our hba card information
 558   */
 559 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 560                                         u32 device_id)
 561 {
 562         u32 dev;
 563         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 564                 if (pm8001_ha->devices[dev].device_id == device_id)
 565                         return &pm8001_ha->devices[dev];
 566         }
 567         if (dev == PM8001_MAX_DEVICES) {
 568                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 569                                 "DEVICE FOUND !!!\n"));
 570         }
 571         return NULL;
 572 }
 573
 574 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 575 {
 576         u32 id = pm8001_dev->id;
 577         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 578         pm8001_dev->id = id;
 579         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 580         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 581         pm8001_dev->sas_device = NULL;
 582 }
 583
 584 /**
 585   * pm8001_dev_found_notify - libsas notify a device is found.
 586   * @dev: the device structure which sas layer used.
 587   *
 588   * when libsas find a sas domain device, it should tell the LLDD that
 589   * device is found, and then LLDD register this device to HBA firmware
 590   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 591   * device ID(according to device's sas address) and returned it to LLDD. From
 592   * now on, we communicate with HBA FW with the device ID which HBA assigned
 593   * rather than sas address. it is the necessary step for our HBA but it is
 594   * the optional for other HBA driver.
 595   */
 596 static int pm8001_dev_found_notify(struct domain_device *dev)
 597 {
 598         unsigned long flags = 0;
 599         int res = 0;
 600         struct pm8001_hba_info *pm8001_ha = NULL;
 601         struct domain_device *parent_dev = dev->parent;
 602         struct pm8001_device *pm8001_device;
 603         DECLARE_COMPLETION_ONSTACK(completion);
 604         u32 flag = 0;
 605         pm8001_ha = pm8001_find_ha_by_dev(dev);
 606         spin_lock_irqsave(&pm8001_ha->lock, flags);
 607
 608         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 609         if (!pm8001_device) {
 610                 res = -1;
 611                 goto found_out;
 612         }
 613         pm8001_device->sas_device = dev;
 614         dev->lldd_dev = pm8001_device;
 615         pm8001_device->dev_type = dev->dev_type;
 616         pm8001_device->dcompletion = &completion;
 617         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 618                 int phy_id;
 619                 struct ex_phy *phy;
 620                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 621                 phy_id++) {
 622                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 623                         if (SAS_ADDR(phy->attached_sas_addr)
 624                                 == SAS_ADDR(dev->sas_addr)) {
 625                                 pm8001_device->attached_phy = phy_id;
 626                                 break;
 627                         }
 628                 }
 629                 if (phy_id == parent_dev->ex_dev.num_phys) {
 630                         PM8001_FAIL_DBG(pm8001_ha,
 631                         pm8001_printk("Error: no attached dev:%016llx"
 632                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 633                                 SAS_ADDR(parent_dev->sas_addr)));
 634                         res = -1;
 635                 }
 636         } else {
 637                 if (dev->dev_type == SAS_SATA_DEV) {
 638                         pm8001_device->attached_phy =
 639                                 dev->rphy->identify.phy_identifier;
 640                                 flag = 1; /* directly sata*/
 641                 }
 642         } /*register this device to HBA*/
 643         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 644         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 645         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 646         wait_for_completion(&completion);
 647         if (dev->dev_type == SAS_END_DEVICE)
 648                 msleep(50);
 649         pm8001_ha->flags = PM8001F_RUN_TIME;
 650         return 0;
 651 found_out:
 652         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 653         return res;
 654 }
 655
 656 int pm8001_dev_found(struct domain_device *dev)
 657 {
 658         return pm8001_dev_found_notify(dev);
 659 }
 660
 661 void pm8001_task_done(struct sas_task *task)
 662 {
 663         if (!del_timer(&task->slow_task->timer))
 664                 return;
 665         complete(&task->slow_task->completion);
 666 }
 667
 668 static void pm8001_tmf_timedout(unsigned long data)
 669 {
 670         struct sas_task *task = (struct sas_task *)data;
 671
 672         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 673         complete(&task->slow_task->completion);
 674 }
 675
 676 #define PM8001_TASK_TIMEOUT 20
 677 /**
 678   * pm8001_exec_internal_tmf_task - execute some task management commands.
 679   * @dev: the wanted device.
 680   * @tmf: which task management wanted to be take.
 681   * @para_len: para_len.
 682   * @parameter: ssp task parameter.
 683   *
 684   * when errors or exception happened, we may want to do something, for example
 685   * abort the issued task which result in this execption, it is done by calling
 686   * this function, note it is also with the task execute interface.
 687   */
 688 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 689         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 690 {
 691         int res, retry;
 692         struct sas_task *task = NULL;
 693         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 694         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 695         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 696
 697         for (retry = 0; retry < 3; retry++) {
 698                 task = sas_alloc_slow_task(GFP_KERNEL);
 699                 if (!task)
 700                         return -ENOMEM;
 701
 702                 task->dev = dev;
 703                 task->task_proto = dev->tproto;
 704                 memcpy(&task->ssp_task, parameter, para_len);
 705                 task->task_done = pm8001_task_done;
 706                 task->slow_task->timer.data = (unsigned long)task;
 707                 task->slow_task->timer.function = pm8001_tmf_timedout;
 708                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 709                 add_timer(&task->slow_task->timer);
 710
 711                 res = pm8001_task_exec(task, 1, GFP_KERNEL, 1, tmf);
 712
 713                 if (res) {
 714                         del_timer(&task->slow_task->timer);
 715                         PM8001_FAIL_DBG(pm8001_ha,
 716                                 pm8001_printk("Executing internal task "
 717                                 "failed\n"));
 718                         goto ex_err;
 719                 }
 720                 wait_for_completion(&task->slow_task->completion);
 721                 if (pm8001_ha->chip_id != chip_8001) {
 722                         pm8001_dev->setds_completion = &completion_setstate;
 723                                 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 724                                         pm8001_dev, 0x01);
 725                         wait_for_completion(&completion_setstate);
 726                 }
 727                 res = -TMF_RESP_FUNC_FAILED;
 728                 /* Even TMF timed out, return direct. */
 729                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 730                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 731                                 PM8001_FAIL_DBG(pm8001_ha,
 732                                         pm8001_printk("TMF task[%x]timeout.\n",
 733                                         tmf->tmf));
 734                                 goto ex_err;
 735                         }
 736                 }
 737
 738                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 739                         task->task_status.stat == SAM_STAT_GOOD) {
 740                         res = TMF_RESP_FUNC_COMPLETE;
 741                         break;
 742                 }
 743
 744                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 745                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 746                         /* no error, but return the number of bytes of
 747                         * underrun */
 748                         res = task->task_status.residual;
 749                         break;
 750                 }
 751
 752                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 753                         task->task_status.stat == SAS_DATA_OVERRUN) {
 754                         PM8001_FAIL_DBG(pm8001_ha,
 755                                 pm8001_printk("Blocked task error.\n"));
 756                         res = -EMSGSIZE;
 757                         break;
 758                 } else {
 759                         PM8001_EH_DBG(pm8001_ha,
 760                                 pm8001_printk(" Task to dev %016llx response:"
 761                                 "0x%x status 0x%x\n",
 762                                 SAS_ADDR(dev->sas_addr),
 763                                 task->task_status.resp,
 764                                 task->task_status.stat));
 765                         sas_free_task(task);
 766                         task = NULL;
 767                 }
 768         }
 769 ex_err:
 770         BUG_ON(retry == 3 && task != NULL);
 771         sas_free_task(task);
 772         return res;
 773 }
 774
 775 static int
 776 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 777         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 778         u32 task_tag)
 779 {
 780         int res, retry;
 781         u32 ccb_tag;
 782         struct pm8001_ccb_info *ccb;
 783         struct sas_task *task = NULL;
 784
 785         for (retry = 0; retry < 3; retry++) {
 786                 task = sas_alloc_slow_task(GFP_KERNEL);
 787                 if (!task)
 788                         return -ENOMEM;
 789
 790                 task->dev = dev;
 791                 task->task_proto = dev->tproto;
 792                 task->task_done = pm8001_task_done;
 793                 task->slow_task->timer.data = (unsigned long)task;
 794                 task->slow_task->timer.function = pm8001_tmf_timedout;
 795                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 796                 add_timer(&task->slow_task->timer);
 797
 798                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 799                 if (res)
 800                         return res;
 801                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 802                 ccb->device = pm8001_dev;
 803                 ccb->ccb_tag = ccb_tag;
 804                 ccb->task = task;
 805
 806                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 807                         pm8001_dev, flag, task_tag, ccb_tag);
 808
 809                 if (res) {
 810                         del_timer(&task->slow_task->timer);
 811                         PM8001_FAIL_DBG(pm8001_ha,
 812                                 pm8001_printk("Executing internal task "
 813                                 "failed\n"));
 814                         goto ex_err;
 815                 }
 816                 wait_for_completion(&task->slow_task->completion);
 817                 res = TMF_RESP_FUNC_FAILED;
 818                 /* Even TMF timed out, return direct. */
 819                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 820                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 821                                 PM8001_FAIL_DBG(pm8001_ha,
 822                                         pm8001_printk("TMF task timeout.\n"));
 823                                 goto ex_err;
 824                         }
 825                 }
 826
 827                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 828                         task->task_status.stat == SAM_STAT_GOOD) {
 829                         res = TMF_RESP_FUNC_COMPLETE;
 830                         break;
 831
 832                 } else {
 833                         PM8001_EH_DBG(pm8001_ha,
 834                                 pm8001_printk(" Task to dev %016llx response: "
 835                                         "0x%x status 0x%x\n",
 836                                 SAS_ADDR(dev->sas_addr),
 837                                 task->task_status.resp,
 838                                 task->task_status.stat));
 839                         sas_free_task(task);
 840                         task = NULL;
 841                 }
 842         }
 843 ex_err:
 844         BUG_ON(retry == 3 && task != NULL);
 845         sas_free_task(task);
 846         return res;
 847 }
 848
 849 /**
 850   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 851   * @dev: the device structure which sas layer used.
 852   */
 853 static void pm8001_dev_gone_notify(struct domain_device *dev)
 854 {
 855         unsigned long flags = 0;
 856         struct pm8001_hba_info *pm8001_ha;
 857         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 858
 859         pm8001_ha = pm8001_find_ha_by_dev(dev);
 860         spin_lock_irqsave(&pm8001_ha->lock, flags);
 861         if (pm8001_dev) {
 862                 u32 device_id = pm8001_dev->device_id;
 863
 864                 PM8001_DISC_DBG(pm8001_ha,
 865                         pm8001_printk("found dev[%d:%x] is gone.\n",
 866                         pm8001_dev->device_id, pm8001_dev->dev_type));
 867                 if (pm8001_dev->running_req) {
 868                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 869                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 870                                 dev, 1, 0);
 871                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 872                 }
 873                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 874                 pm8001_free_dev(pm8001_dev);
 875         } else {
 876                 PM8001_DISC_DBG(pm8001_ha,
 877                         pm8001_printk("Found dev has gone.\n"));
 878         }
 879         dev->lldd_dev = NULL;
 880         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 881 }
 882
 883 void pm8001_dev_gone(struct domain_device *dev)
 884 {
 885         pm8001_dev_gone_notify(dev);
 886 }
 887
 888 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 889         u8 *lun, struct pm8001_tmf_task *tmf)
 890 {
 891         struct sas_ssp_task ssp_task;
 892         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 893                 return TMF_RESP_FUNC_ESUPP;
 894
 895         strncpy((u8 *)&ssp_task.LUN, lun, 8);
 896         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 897                 tmf);
 898 }
 899
 900 /* retry commands by ha, by task and/or by device */
 901 void pm8001_open_reject_retry(
 902         struct pm8001_hba_info *pm8001_ha,
 903         struct sas_task *task_to_close,
 904         struct pm8001_device *device_to_close)
 905 {
 906         int i;
 907         unsigned long flags;
 908
 909         if (pm8001_ha == NULL)
 910                 return;
 911
 912         spin_lock_irqsave(&pm8001_ha->lock, flags);
 913
 914         for (i = 0; i < PM8001_MAX_CCB; i++) {
 915                 struct sas_task *task;
 916                 struct task_status_struct *ts;
 917                 struct pm8001_device *pm8001_dev;
 918                 unsigned long flags1;
 919                 u32 tag;
 920                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 921
 922                 pm8001_dev = ccb->device;
 923                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 924                         continue;
 925                 if (!device_to_close) {
 926                         uintptr_t d = (uintptr_t)pm8001_dev
 927                                         - (uintptr_t)&pm8001_ha->devices;
 928                         if (((d % sizeof(*pm8001_dev)) != 0)
 929                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 930                                 continue;
 931                 } else if (pm8001_dev != device_to_close)
 932                         continue;
 933                 tag = ccb->ccb_tag;
 934                 if (!tag || (tag == 0xFFFFFFFF))
 935                         continue;
 936                 task = ccb->task;
 937                 if (!task || !task->task_done)
 938                         continue;
 939                 if (task_to_close && (task != task_to_close))
 940                         continue;
 941                 ts = &task->task_status;
 942                 ts->resp = SAS_TASK_COMPLETE;
 943                 /* Force the midlayer to retry */
 944                 ts->stat = SAS_OPEN_REJECT;
 945                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 946                 if (pm8001_dev)
 947                         pm8001_dev->running_req--;
 948                 spin_lock_irqsave(&task->task_state_lock, flags1);
 949                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 950                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 951                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 952                 if (unlikely((task->task_state_flags
 953                                 & SAS_TASK_STATE_ABORTED))) {
 954                         spin_unlock_irqrestore(&task->task_state_lock,
 955                                 flags1);
 956                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 957                 } else {
 958                         spin_unlock_irqrestore(&task->task_state_lock,
 959                                 flags1);
 960                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 961                         mb();/* in order to force CPU ordering */
 962                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 963                         task->task_done(task);
 964                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 965                 }
 966         }
 967
 968         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 969 }
 970
 971 /**
 972   * Standard mandates link reset for ATA  (type 0) and hard reset for
 973   * SSP (type 1) , only for RECOVERY
 974   */
 975 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 976 {
 977         int rc = TMF_RESP_FUNC_FAILED;
 978         struct pm8001_device *pm8001_dev;
 979         struct pm8001_hba_info *pm8001_ha;
 980         struct sas_phy *phy;
 981
 982         if (!dev || !dev->lldd_dev)
 983                 return -ENODEV;
 984
 985         pm8001_dev = dev->lldd_dev;
 986         pm8001_ha = pm8001_find_ha_by_dev(dev);
 987         phy = sas_get_local_phy(dev);
 988
 989         if (dev_is_sata(dev)) {
 990                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
 991                 if (scsi_is_sas_phy_local(phy)) {
 992                         rc = 0;
 993                         goto out;
 994                 }
 995                 rc = sas_phy_reset(phy, 1);
 996                 msleep(2000);
 997                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 998                         dev, 1, 0);
 999                 pm8001_dev->setds_completion = &completion_setstate;
1000                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1001                         pm8001_dev, 0x01);
1002                 wait_for_completion(&completion_setstate);
1003         } else {
1004                 rc = sas_phy_reset(phy, 1);
1005                 msleep(2000);
1006         }
1007         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1008                 pm8001_dev->device_id, rc));
1009  out:
1010         sas_put_local_phy(phy);
1011         return rc;
1012 }
1013
1014 /*
1015 * This function handle the IT_NEXUS_XXX event or completion
1016 * status code for SSP/SATA/SMP I/O request.
1017 */
1018 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1019 {
1020         int rc = TMF_RESP_FUNC_FAILED;
1021         struct pm8001_device *pm8001_dev;
1022         struct pm8001_hba_info *pm8001_ha;
1023         struct sas_phy *phy;
1024         u32 device_id = 0;
1025
1026         if (!dev || !dev->lldd_dev)
1027                 return -1;
1028
1029         pm8001_dev = dev->lldd_dev;
1030         device_id = pm8001_dev->device_id;
1031         pm8001_ha = pm8001_find_ha_by_dev(dev);
1032
1033         PM8001_EH_DBG(pm8001_ha,
1034                         pm8001_printk("I_T_Nexus handler invoked !!"));
1035
1036         phy = sas_get_local_phy(dev);
1037
1038         if (dev_is_sata(dev)) {
1039                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1040                 if (scsi_is_sas_phy_local(phy)) {
1041                         rc = 0;
1042                         goto out;
1043                 }
1044                 /* send internal ssp/sata/smp abort command to FW */
1045                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1046                                                         dev, 1, 0);
1047                 msleep(100);
1048
1049                 /* deregister the target device */
1050                 pm8001_dev_gone_notify(dev);
1051                 msleep(200);
1052
1053                 /*send phy reset to hard reset target */
1054                 rc = sas_phy_reset(phy, 1);
1055                 msleep(2000);
1056                 pm8001_dev->setds_completion = &completion_setstate;
1057
1058                 wait_for_completion(&completion_setstate);
1059         } else {
1060                 /* send internal ssp/sata/smp abort command to FW */
1061                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1062                                                         dev, 1, 0);
1063                 msleep(100);
1064
1065                 /* deregister the target device */
1066                 pm8001_dev_gone_notify(dev);
1067                 msleep(200);
1068
1069                 /*send phy reset to hard reset target */
1070                 rc = sas_phy_reset(phy, 1);
1071                 msleep(2000);
1072         }
1073         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1074                 pm8001_dev->device_id, rc));
1075 out:
1076         sas_put_local_phy(phy);
1077
1078         return rc;
1079 }
1080 /* mandatory SAM-3, the task reset the specified LUN*/
1081 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1082 {
1083         int rc = TMF_RESP_FUNC_FAILED;
1084         struct pm8001_tmf_task tmf_task;
1085         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1086         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1087         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1088         if (dev_is_sata(dev)) {
1089                 struct sas_phy *phy = sas_get_local_phy(dev);
1090                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1091                         dev, 1, 0);
1092                 rc = sas_phy_reset(phy, 1);
1093                 sas_put_local_phy(phy);
1094                 pm8001_dev->setds_completion = &completion_setstate;
1095                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1096                         pm8001_dev, 0x01);
1097                 wait_for_completion(&completion_setstate);
1098         } else {
1099                 tmf_task.tmf = TMF_LU_RESET;
1100                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1101         }
1102         /* If failed, fall-through I_T_Nexus reset */
1103         PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1104                 pm8001_dev->device_id, rc));
1105         return rc;
1106 }
1107
1108 /* optional SAM-3 */
1109 int pm8001_query_task(struct sas_task *task)
1110 {
1111         u32 tag = 0xdeadbeef;
1112         int i = 0;
1113         struct scsi_lun lun;
1114         struct pm8001_tmf_task tmf_task;
1115         int rc = TMF_RESP_FUNC_FAILED;
1116         if (unlikely(!task || !task->lldd_task || !task->dev))
1117                 return rc;
1118
1119         if (task->task_proto & SAS_PROTOCOL_SSP) {
1120                 struct scsi_cmnd *cmnd = task->uldd_task;
1121                 struct domain_device *dev = task->dev;
1122                 struct pm8001_hba_info *pm8001_ha =
1123                         pm8001_find_ha_by_dev(dev);
1124
1125                 int_to_scsilun(cmnd->device->lun, &lun);
1126                 rc = pm8001_find_tag(task, &tag);
1127                 if (rc == 0) {
1128                         rc = TMF_RESP_FUNC_FAILED;
1129                         return rc;
1130                 }
1131                 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1132                 for (i = 0; i < 16; i++)
1133                         printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1134                 printk(KERN_INFO "]\n");
1135                 tmf_task.tmf =  TMF_QUERY_TASK;
1136                 tmf_task.tag_of_task_to_be_managed = tag;
1137
1138                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1139                 switch (rc) {
1140                 /* The task is still in Lun, release it then */
1141                 case TMF_RESP_FUNC_SUCC:
1142                         PM8001_EH_DBG(pm8001_ha,
1143                                 pm8001_printk("The task is still in Lun\n"));
1144                         break;
1145                 /* The task is not in Lun or failed, reset the phy */
1146                 case TMF_RESP_FUNC_FAILED:
1147                 case TMF_RESP_FUNC_COMPLETE:
1148                         PM8001_EH_DBG(pm8001_ha,
1149                         pm8001_printk("The task is not in Lun or failed,"
1150                         " reset the phy\n"));
1151                         break;
1152                 }
1153         }
1154         pm8001_printk(":rc= %d\n", rc);
1155         return rc;
1156 }
1157
1158 /*  mandatory SAM-3, still need free task/ccb info, abord the specified task */
1159 int pm8001_abort_task(struct sas_task *task)
1160 {
1161         unsigned long flags;
1162         u32 tag = 0xdeadbeef;
1163         u32 device_id;
1164         struct domain_device *dev ;
1165         struct pm8001_hba_info *pm8001_ha = NULL;
1166         struct pm8001_ccb_info *ccb;
1167         struct scsi_lun lun;
1168         struct pm8001_device *pm8001_dev;
1169         struct pm8001_tmf_task tmf_task;
1170         int rc = TMF_RESP_FUNC_FAILED;
1171         if (unlikely(!task || !task->lldd_task || !task->dev))
1172                 return rc;
1173         spin_lock_irqsave(&task->task_state_lock, flags);
1174         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1175                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1176                 rc = TMF_RESP_FUNC_COMPLETE;
1177                 goto out;
1178         }
1179         spin_unlock_irqrestore(&task->task_state_lock, flags);
1180         if (task->task_proto & SAS_PROTOCOL_SSP) {
1181                 struct scsi_cmnd *cmnd = task->uldd_task;
1182                 dev = task->dev;
1183                 ccb = task->lldd_task;
1184                 pm8001_dev = dev->lldd_dev;
1185                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1186                 int_to_scsilun(cmnd->device->lun, &lun);
1187                 rc = pm8001_find_tag(task, &tag);
1188                 if (rc == 0) {
1189                         printk(KERN_INFO "No such tag in %s\n", __func__);
1190                         rc = TMF_RESP_FUNC_FAILED;
1191                         return rc;
1192                 }
1193                 device_id = pm8001_dev->device_id;
1194                 PM8001_EH_DBG(pm8001_ha,
1195                         pm8001_printk("abort io to deviceid= %d\n", device_id));
1196                 tmf_task.tmf = TMF_ABORT_TASK;
1197                 tmf_task.tag_of_task_to_be_managed = tag;
1198                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1199                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1200                         pm8001_dev->sas_device, 0, tag);
1201         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1202                 task->task_proto & SAS_PROTOCOL_STP) {
1203                 dev = task->dev;
1204                 pm8001_dev = dev->lldd_dev;
1205                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1206                 rc = pm8001_find_tag(task, &tag);
1207                 if (rc == 0) {
1208                         printk(KERN_INFO "No such tag in %s\n", __func__);
1209                         rc = TMF_RESP_FUNC_FAILED;
1210                         return rc;
1211                 }
1212                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1213                         pm8001_dev->sas_device, 0, tag);
1214         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1215                 /* SMP */
1216                 dev = task->dev;
1217                 pm8001_dev = dev->lldd_dev;
1218                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1219                 rc = pm8001_find_tag(task, &tag);
1220                 if (rc == 0) {
1221                         printk(KERN_INFO "No such tag in %s\n", __func__);
1222                         rc = TMF_RESP_FUNC_FAILED;
1223                         return rc;
1224                 }
1225                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1226                         pm8001_dev->sas_device, 0, tag);
1227
1228         }
1229 out:
1230         if (rc != TMF_RESP_FUNC_COMPLETE)
1231                 pm8001_printk("rc= %d\n", rc);
1232         return rc;
1233 }
1234
1235 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1236 {
1237         int rc = TMF_RESP_FUNC_FAILED;
1238         struct pm8001_tmf_task tmf_task;
1239
1240         tmf_task.tmf = TMF_ABORT_TASK_SET;
1241         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1242         return rc;
1243 }
1244
1245 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1246 {
1247         int rc = TMF_RESP_FUNC_FAILED;
1248         struct pm8001_tmf_task tmf_task;
1249
1250         tmf_task.tmf = TMF_CLEAR_ACA;
1251         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1252
1253         return rc;
1254 }
1255
1256 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1257 {
1258         int rc = TMF_RESP_FUNC_FAILED;
1259         struct pm8001_tmf_task tmf_task;
1260         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1261         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1262
1263         PM8001_EH_DBG(pm8001_ha,
1264                 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1265                 pm8001_dev->device_id));
1266         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1267         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1268         return rc;
1269 }
1270