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                     qc->tf.command == ATA_CMD_FPDMA_RECV ||
 285                     qc->tf.command == ATA_CMD_FPDMA_SEND ||
 286                     qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
 287                         *tag = qc->tag;
 288                         return 1;
 289                 }
 290         }
 291         return 0;
 292 }
 293
 294 /**
 295   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 296   * @pm8001_ha: our hba card information
 297   * @ccb: the ccb which attached to sata task
 298   */
 299 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 300         struct pm8001_ccb_info *ccb)
 301 {
 302         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 303 }
 304
 305 /**
 306   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 307   * @pm8001_ha: our hba card information
 308   * @ccb: the ccb which attached to TM
 309   * @tmf: the task management IU
 310   */
 311 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 312         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 313 {
 314         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 315 }
 316
 317 /**
 318   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 319   * @pm8001_ha: our hba card information
 320   * @ccb: the ccb which attached to ssp task
 321   */
 322 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 323         struct pm8001_ccb_info *ccb)
 324 {
 325         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 326 }
 327
 328  /* Find the local port id that's attached to this device */
 329 static int sas_find_local_port_id(struct domain_device *dev)
 330 {
 331         struct domain_device *pdev = dev->parent;
 332
 333         /* Directly attached device */
 334         if (!pdev)
 335                 return dev->port->id;
 336         while (pdev) {
 337                 struct domain_device *pdev_p = pdev->parent;
 338                 if (!pdev_p)
 339                         return pdev->port->id;
 340                 pdev = pdev->parent;
 341         }
 342         return 0;
 343 }
 344
 345 /**
 346   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 347   * @task: the task to be execute.
 348   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 349   * we always execute one one time.
 350   * @gfp_flags: gfp_flags.
 351   * @is_tmf: if it is task management task.
 352   * @tmf: the task management IU
 353   */
 354 #define DEV_IS_GONE(pm8001_dev) \
 355         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 356 static int pm8001_task_exec(struct sas_task *task,
 357         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 358 {
 359         struct domain_device *dev = task->dev;
 360         struct pm8001_hba_info *pm8001_ha;
 361         struct pm8001_device *pm8001_dev;
 362         struct pm8001_port *port = NULL;
 363         struct sas_task *t = task;
 364         struct pm8001_ccb_info *ccb;
 365         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 366         unsigned long flags = 0;
 367
 368         if (!dev->port) {
 369                 struct task_status_struct *tsm = &t->task_status;
 370                 tsm->resp = SAS_TASK_UNDELIVERED;
 371                 tsm->stat = SAS_PHY_DOWN;
 372                 if (dev->dev_type != SAS_SATA_DEV)
 373                         t->task_done(t);
 374                 return 0;
 375         }
 376         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 377         PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 378         spin_lock_irqsave(&pm8001_ha->lock, flags);
 379         do {
 380                 dev = t->dev;
 381                 pm8001_dev = dev->lldd_dev;
 382                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 383                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 384                         if (sas_protocol_ata(t->task_proto)) {
 385                                 struct task_status_struct *ts = &t->task_status;
 386                                 ts->resp = SAS_TASK_UNDELIVERED;
 387                                 ts->stat = SAS_PHY_DOWN;
 388
 389                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 390                                 t->task_done(t);
 391                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 392                                 continue;
 393                         } else {
 394                                 struct task_status_struct *ts = &t->task_status;
 395                                 ts->resp = SAS_TASK_UNDELIVERED;
 396                                 ts->stat = SAS_PHY_DOWN;
 397                                 t->task_done(t);
 398                                 continue;
 399                         }
 400                 }
 401                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 402                 if (rc)
 403                         goto err_out;
 404                 ccb = &pm8001_ha->ccb_info[tag];
 405
 406                 if (!sas_protocol_ata(t->task_proto)) {
 407                         if (t->num_scatter) {
 408                                 n_elem = dma_map_sg(pm8001_ha->dev,
 409                                         t->scatter,
 410                                         t->num_scatter,
 411                                         t->data_dir);
 412                                 if (!n_elem) {
 413                                         rc = -ENOMEM;
 414                                         goto err_out_tag;
 415                                 }
 416                         }
 417                 } else {
 418                         n_elem = t->num_scatter;
 419                 }
 420
 421                 t->lldd_task = ccb;
 422                 ccb->n_elem = n_elem;
 423                 ccb->ccb_tag = tag;
 424                 ccb->task = t;
 425                 ccb->device = pm8001_dev;
 426                 switch (t->task_proto) {
 427                 case SAS_PROTOCOL_SMP:
 428                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 429                         break;
 430                 case SAS_PROTOCOL_SSP:
 431                         if (is_tmf)
 432                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 433                                         ccb, tmf);
 434                         else
 435                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 436                         break;
 437                 case SAS_PROTOCOL_SATA:
 438                 case SAS_PROTOCOL_STP:
 439                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 440                         break;
 441                 default:
 442                         dev_printk(KERN_ERR, pm8001_ha->dev,
 443                                 "unknown sas_task proto: 0x%x\n",
 444                                 t->task_proto);
 445                         rc = -EINVAL;
 446                         break;
 447                 }
 448
 449                 if (rc) {
 450                         PM8001_IO_DBG(pm8001_ha,
 451                                 pm8001_printk("rc is %x\n", rc));
 452                         goto err_out_tag;
 453                 }
 454                 /* TODO: select normal or high priority */
 455                 spin_lock(&t->task_state_lock);
 456                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 457                 spin_unlock(&t->task_state_lock);
 458                 pm8001_dev->running_req++;
 459         } while (0);
 460         rc = 0;
 461         goto out_done;
 462
 463 err_out_tag:
 464         pm8001_tag_free(pm8001_ha, tag);
 465 err_out:
 466         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 467         if (!sas_protocol_ata(t->task_proto))
 468                 if (n_elem)
 469                         dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem,
 470                                 t->data_dir);
 471 out_done:
 472         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 473         return rc;
 474 }
 475
 476 /**
 477   * pm8001_queue_command - register for upper layer used, all IO commands sent
 478   * to HBA are from this interface.
 479   * @task: the task to be execute.
 480   * @gfp_flags: gfp_flags
 481   */
 482 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 483 {
 484         return pm8001_task_exec(task, gfp_flags, 0, NULL);
 485 }
 486
 487 /**
 488   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 489   * @pm8001_ha: our hba card information
 490   * @ccb: the ccb which attached to ssp task
 491   * @task: the task to be free.
 492   * @ccb_idx: ccb index.
 493   */
 494 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 495         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 496 {
 497         if (!ccb->task)
 498                 return;
 499         if (!sas_protocol_ata(task->task_proto))
 500                 if (ccb->n_elem)
 501                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 502                                 task->num_scatter, task->data_dir);
 503
 504         switch (task->task_proto) {
 505         case SAS_PROTOCOL_SMP:
 506                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 507                         PCI_DMA_FROMDEVICE);
 508                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 509                         PCI_DMA_TODEVICE);
 510                 break;
 511
 512         case SAS_PROTOCOL_SATA:
 513         case SAS_PROTOCOL_STP:
 514         case SAS_PROTOCOL_SSP:
 515         default:
 516                 /* do nothing */
 517                 break;
 518         }
 519         task->lldd_task = NULL;
 520         ccb->task = NULL;
 521         ccb->ccb_tag = 0xFFFFFFFF;
 522         ccb->open_retry = 0;
 523         pm8001_tag_free(pm8001_ha, ccb_idx);
 524 }
 525
 526  /**
 527   * pm8001_alloc_dev - find a empty pm8001_device
 528   * @pm8001_ha: our hba card information
 529   */
 530 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 531 {
 532         u32 dev;
 533         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 534                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 535                         pm8001_ha->devices[dev].id = dev;
 536                         return &pm8001_ha->devices[dev];
 537                 }
 538         }
 539         if (dev == PM8001_MAX_DEVICES) {
 540                 PM8001_FAIL_DBG(pm8001_ha,
 541                         pm8001_printk("max support %d devices, ignore ..\n",
 542                         PM8001_MAX_DEVICES));
 543         }
 544         return NULL;
 545 }
 546 /**
 547   * pm8001_find_dev - find a matching pm8001_device
 548   * @pm8001_ha: our hba card information
 549   */
 550 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 551                                         u32 device_id)
 552 {
 553         u32 dev;
 554         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 555                 if (pm8001_ha->devices[dev].device_id == device_id)
 556                         return &pm8001_ha->devices[dev];
 557         }
 558         if (dev == PM8001_MAX_DEVICES) {
 559                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 560                                 "DEVICE FOUND !!!\n"));
 561         }
 562         return NULL;
 563 }
 564
 565 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 566 {
 567         u32 id = pm8001_dev->id;
 568         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 569         pm8001_dev->id = id;
 570         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 571         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 572         pm8001_dev->sas_device = NULL;
 573 }
 574
 575 /**
 576   * pm8001_dev_found_notify - libsas notify a device is found.
 577   * @dev: the device structure which sas layer used.
 578   *
 579   * when libsas find a sas domain device, it should tell the LLDD that
 580   * device is found, and then LLDD register this device to HBA firmware
 581   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 582   * device ID(according to device's sas address) and returned it to LLDD. From
 583   * now on, we communicate with HBA FW with the device ID which HBA assigned
 584   * rather than sas address. it is the necessary step for our HBA but it is
 585   * the optional for other HBA driver.
 586   */
 587 static int pm8001_dev_found_notify(struct domain_device *dev)
 588 {
 589         unsigned long flags = 0;
 590         int res = 0;
 591         struct pm8001_hba_info *pm8001_ha = NULL;
 592         struct domain_device *parent_dev = dev->parent;
 593         struct pm8001_device *pm8001_device;
 594         DECLARE_COMPLETION_ONSTACK(completion);
 595         u32 flag = 0;
 596         pm8001_ha = pm8001_find_ha_by_dev(dev);
 597         spin_lock_irqsave(&pm8001_ha->lock, flags);
 598
 599         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 600         if (!pm8001_device) {
 601                 res = -1;
 602                 goto found_out;
 603         }
 604         pm8001_device->sas_device = dev;
 605         dev->lldd_dev = pm8001_device;
 606         pm8001_device->dev_type = dev->dev_type;
 607         pm8001_device->dcompletion = &completion;
 608         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 609                 int phy_id;
 610                 struct ex_phy *phy;
 611                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 612                 phy_id++) {
 613                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 614                         if (SAS_ADDR(phy->attached_sas_addr)
 615                                 == SAS_ADDR(dev->sas_addr)) {
 616                                 pm8001_device->attached_phy = phy_id;
 617                                 break;
 618                         }
 619                 }
 620                 if (phy_id == parent_dev->ex_dev.num_phys) {
 621                         PM8001_FAIL_DBG(pm8001_ha,
 622                         pm8001_printk("Error: no attached dev:%016llx"
 623                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 624                                 SAS_ADDR(parent_dev->sas_addr)));
 625                         res = -1;
 626                 }
 627         } else {
 628                 if (dev->dev_type == SAS_SATA_DEV) {
 629                         pm8001_device->attached_phy =
 630                                 dev->rphy->identify.phy_identifier;
 631                                 flag = 1; /* directly sata*/
 632                 }
 633         } /*register this device to HBA*/
 634         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 635         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 636         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 637         wait_for_completion(&completion);
 638         if (dev->dev_type == SAS_END_DEVICE)
 639                 msleep(50);
 640         pm8001_ha->flags = PM8001F_RUN_TIME;
 641         return 0;
 642 found_out:
 643         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 644         return res;
 645 }
 646
 647 int pm8001_dev_found(struct domain_device *dev)
 648 {
 649         return pm8001_dev_found_notify(dev);
 650 }
 651
 652 void pm8001_task_done(struct sas_task *task)
 653 {
 654         if (!del_timer(&task->slow_task->timer))
 655                 return;
 656         complete(&task->slow_task->completion);
 657 }
 658
 659 static void pm8001_tmf_timedout(unsigned long data)
 660 {
 661         struct sas_task *task = (struct sas_task *)data;
 662
 663         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 664         complete(&task->slow_task->completion);
 665 }
 666
 667 #define PM8001_TASK_TIMEOUT 20
 668 /**
 669   * pm8001_exec_internal_tmf_task - execute some task management commands.
 670   * @dev: the wanted device.
 671   * @tmf: which task management wanted to be take.
 672   * @para_len: para_len.
 673   * @parameter: ssp task parameter.
 674   *
 675   * when errors or exception happened, we may want to do something, for example
 676   * abort the issued task which result in this execption, it is done by calling
 677   * this function, note it is also with the task execute interface.
 678   */
 679 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 680         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 681 {
 682         int res, retry;
 683         struct sas_task *task = NULL;
 684         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 685         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 686         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 687
 688         for (retry = 0; retry < 3; retry++) {
 689                 task = sas_alloc_slow_task(GFP_KERNEL);
 690                 if (!task)
 691                         return -ENOMEM;
 692
 693                 task->dev = dev;
 694                 task->task_proto = dev->tproto;
 695                 memcpy(&task->ssp_task, parameter, para_len);
 696                 task->task_done = pm8001_task_done;
 697                 task->slow_task->timer.data = (unsigned long)task;
 698                 task->slow_task->timer.function = pm8001_tmf_timedout;
 699                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 700                 add_timer(&task->slow_task->timer);
 701
 702                 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 703
 704                 if (res) {
 705                         del_timer(&task->slow_task->timer);
 706                         PM8001_FAIL_DBG(pm8001_ha,
 707                                 pm8001_printk("Executing internal task "
 708                                 "failed\n"));
 709                         goto ex_err;
 710                 }
 711                 wait_for_completion(&task->slow_task->completion);
 712                 if (pm8001_ha->chip_id != chip_8001) {
 713                         pm8001_dev->setds_completion = &completion_setstate;
 714                                 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 715                                         pm8001_dev, 0x01);
 716                         wait_for_completion(&completion_setstate);
 717                 }
 718                 res = -TMF_RESP_FUNC_FAILED;
 719                 /* Even TMF timed out, return direct. */
 720                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 721                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 722                                 PM8001_FAIL_DBG(pm8001_ha,
 723                                         pm8001_printk("TMF task[%x]timeout.\n",
 724                                         tmf->tmf));
 725                                 goto ex_err;
 726                         }
 727                 }
 728
 729                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 730                         task->task_status.stat == SAM_STAT_GOOD) {
 731                         res = TMF_RESP_FUNC_COMPLETE;
 732                         break;
 733                 }
 734
 735                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 736                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 737                         /* no error, but return the number of bytes of
 738                         * underrun */
 739                         res = task->task_status.residual;
 740                         break;
 741                 }
 742
 743                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 744                         task->task_status.stat == SAS_DATA_OVERRUN) {
 745                         PM8001_FAIL_DBG(pm8001_ha,
 746                                 pm8001_printk("Blocked task error.\n"));
 747                         res = -EMSGSIZE;
 748                         break;
 749                 } else {
 750                         PM8001_EH_DBG(pm8001_ha,
 751                                 pm8001_printk(" Task to dev %016llx response:"
 752                                 "0x%x status 0x%x\n",
 753                                 SAS_ADDR(dev->sas_addr),
 754                                 task->task_status.resp,
 755                                 task->task_status.stat));
 756                         sas_free_task(task);
 757                         task = NULL;
 758                 }
 759         }
 760 ex_err:
 761         BUG_ON(retry == 3 && task != NULL);
 762         sas_free_task(task);
 763         return res;
 764 }
 765
 766 static int
 767 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 768         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 769         u32 task_tag)
 770 {
 771         int res, retry;
 772         u32 ccb_tag;
 773         struct pm8001_ccb_info *ccb;
 774         struct sas_task *task = NULL;
 775
 776         for (retry = 0; retry < 3; retry++) {
 777                 task = sas_alloc_slow_task(GFP_KERNEL);
 778                 if (!task)
 779                         return -ENOMEM;
 780
 781                 task->dev = dev;
 782                 task->task_proto = dev->tproto;
 783                 task->task_done = pm8001_task_done;
 784                 task->slow_task->timer.data = (unsigned long)task;
 785                 task->slow_task->timer.function = pm8001_tmf_timedout;
 786                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 787                 add_timer(&task->slow_task->timer);
 788
 789                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 790                 if (res)
 791                         return res;
 792                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 793                 ccb->device = pm8001_dev;
 794                 ccb->ccb_tag = ccb_tag;
 795                 ccb->task = task;
 796                 ccb->n_elem = 0;
 797
 798                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 799                         pm8001_dev, flag, task_tag, ccb_tag);
 800
 801                 if (res) {
 802                         del_timer(&task->slow_task->timer);
 803                         PM8001_FAIL_DBG(pm8001_ha,
 804                                 pm8001_printk("Executing internal task "
 805                                 "failed\n"));
 806                         goto ex_err;
 807                 }
 808                 wait_for_completion(&task->slow_task->completion);
 809                 res = TMF_RESP_FUNC_FAILED;
 810                 /* Even TMF timed out, return direct. */
 811                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 812                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 813                                 PM8001_FAIL_DBG(pm8001_ha,
 814                                         pm8001_printk("TMF task timeout.\n"));
 815                                 goto ex_err;
 816                         }
 817                 }
 818
 819                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 820                         task->task_status.stat == SAM_STAT_GOOD) {
 821                         res = TMF_RESP_FUNC_COMPLETE;
 822                         break;
 823
 824                 } else {
 825                         PM8001_EH_DBG(pm8001_ha,
 826                                 pm8001_printk(" Task to dev %016llx response: "
 827                                         "0x%x status 0x%x\n",
 828                                 SAS_ADDR(dev->sas_addr),
 829                                 task->task_status.resp,
 830                                 task->task_status.stat));
 831                         sas_free_task(task);
 832                         task = NULL;
 833                 }
 834         }
 835 ex_err:
 836         BUG_ON(retry == 3 && task != NULL);
 837         sas_free_task(task);
 838         return res;
 839 }
 840
 841 /**
 842   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 843   * @dev: the device structure which sas layer used.
 844   */
 845 static void pm8001_dev_gone_notify(struct domain_device *dev)
 846 {
 847         unsigned long flags = 0;
 848         struct pm8001_hba_info *pm8001_ha;
 849         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 850
 851         pm8001_ha = pm8001_find_ha_by_dev(dev);
 852         spin_lock_irqsave(&pm8001_ha->lock, flags);
 853         if (pm8001_dev) {
 854                 u32 device_id = pm8001_dev->device_id;
 855
 856                 PM8001_DISC_DBG(pm8001_ha,
 857                         pm8001_printk("found dev[%d:%x] is gone.\n",
 858                         pm8001_dev->device_id, pm8001_dev->dev_type));
 859                 if (pm8001_dev->running_req) {
 860                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 861                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 862                                 dev, 1, 0);
 863                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 864                 }
 865                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 866                 pm8001_free_dev(pm8001_dev);
 867         } else {
 868                 PM8001_DISC_DBG(pm8001_ha,
 869                         pm8001_printk("Found dev has gone.\n"));
 870         }
 871         dev->lldd_dev = NULL;
 872         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 873 }
 874
 875 void pm8001_dev_gone(struct domain_device *dev)
 876 {
 877         pm8001_dev_gone_notify(dev);
 878 }
 879
 880 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 881         u8 *lun, struct pm8001_tmf_task *tmf)
 882 {
 883         struct sas_ssp_task ssp_task;
 884         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 885                 return TMF_RESP_FUNC_ESUPP;
 886
 887         strncpy((u8 *)&ssp_task.LUN, lun, 8);
 888         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 889                 tmf);
 890 }
 891
 892 /* retry commands by ha, by task and/or by device */
 893 void pm8001_open_reject_retry(
 894         struct pm8001_hba_info *pm8001_ha,
 895         struct sas_task *task_to_close,
 896         struct pm8001_device *device_to_close)
 897 {
 898         int i;
 899         unsigned long flags;
 900
 901         if (pm8001_ha == NULL)
 902                 return;
 903
 904         spin_lock_irqsave(&pm8001_ha->lock, flags);
 905
 906         for (i = 0; i < PM8001_MAX_CCB; i++) {
 907                 struct sas_task *task;
 908                 struct task_status_struct *ts;
 909                 struct pm8001_device *pm8001_dev;
 910                 unsigned long flags1;
 911                 u32 tag;
 912                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 913
 914                 pm8001_dev = ccb->device;
 915                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 916                         continue;
 917                 if (!device_to_close) {
 918                         uintptr_t d = (uintptr_t)pm8001_dev
 919                                         - (uintptr_t)&pm8001_ha->devices;
 920                         if (((d % sizeof(*pm8001_dev)) != 0)
 921                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 922                                 continue;
 923                 } else if (pm8001_dev != device_to_close)
 924                         continue;
 925                 tag = ccb->ccb_tag;
 926                 if (!tag || (tag == 0xFFFFFFFF))
 927                         continue;
 928                 task = ccb->task;
 929                 if (!task || !task->task_done)
 930                         continue;
 931                 if (task_to_close && (task != task_to_close))
 932                         continue;
 933                 ts = &task->task_status;
 934                 ts->resp = SAS_TASK_COMPLETE;
 935                 /* Force the midlayer to retry */
 936                 ts->stat = SAS_OPEN_REJECT;
 937                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 938                 if (pm8001_dev)
 939                         pm8001_dev->running_req--;
 940                 spin_lock_irqsave(&task->task_state_lock, flags1);
 941                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 942                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 943                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 944                 if (unlikely((task->task_state_flags
 945                                 & SAS_TASK_STATE_ABORTED))) {
 946                         spin_unlock_irqrestore(&task->task_state_lock,
 947                                 flags1);
 948                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 949                 } else {
 950                         spin_unlock_irqrestore(&task->task_state_lock,
 951                                 flags1);
 952                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 953                         mb();/* in order to force CPU ordering */
 954                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 955                         task->task_done(task);
 956                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 957                 }
 958         }
 959
 960         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 961 }
 962
 963 /**
 964   * Standard mandates link reset for ATA  (type 0) and hard reset for
 965   * SSP (type 1) , only for RECOVERY
 966   */
 967 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 968 {
 969         int rc = TMF_RESP_FUNC_FAILED;
 970         struct pm8001_device *pm8001_dev;
 971         struct pm8001_hba_info *pm8001_ha;
 972         struct sas_phy *phy;
 973
 974         if (!dev || !dev->lldd_dev)
 975                 return -ENODEV;
 976
 977         pm8001_dev = dev->lldd_dev;
 978         pm8001_ha = pm8001_find_ha_by_dev(dev);
 979         phy = sas_get_local_phy(dev);
 980
 981         if (dev_is_sata(dev)) {
 982                 if (scsi_is_sas_phy_local(phy)) {
 983                         rc = 0;
 984                         goto out;
 985                 }
 986                 rc = sas_phy_reset(phy, 1);
 987                 if (rc) {
 988                         PM8001_EH_DBG(pm8001_ha,
 989                         pm8001_printk("phy reset failed for device %x\n"
 990                         "with rc %d\n", pm8001_dev->device_id, rc));
 991                         rc = TMF_RESP_FUNC_FAILED;
 992                         goto out;
 993                 }
 994                 msleep(2000);
 995                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 996                         dev, 1, 0);
 997                 if (rc) {
 998                         PM8001_EH_DBG(pm8001_ha,
 999                         pm8001_printk("task abort failed %x\n"
1000                         "with rc %d\n", pm8001_dev->device_id, rc));
1001                         rc = TMF_RESP_FUNC_FAILED;
1002                 }
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