drivers/scsi/pm8001/pm8001_sas.c

   1 /*
   2  * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
   3  *
   4  * Copyright (c) 2008-2009 USI Co., Ltd.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification.
  13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14  *    substantially similar to the "NO WARRANTY" disclaimer below
  15  *    ("Disclaimer") and any redistribution must be conditioned upon
  16  *    including a substantially similar Disclaimer requirement for further
  17  *    binary redistribution.
  18  * 3. Neither the names of the above-listed copyright holders nor the names
  19  *    of any contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * Alternatively, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2 as published by the Free
  24  * Software Foundation.
  25  *
  26  * NO WARRANTY
  27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  30  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  36  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGES.
  38  *
  39  */
  40
  41 #include <linux/slab.h>
  42 #include "pm8001_sas.h"
  43
  44 /**
  45  * pm8001_find_tag - from sas task to find out  tag that belongs to this task
  46  * @task: the task sent to the LLDD
  47  * @tag: the found tag associated with the task
  48  */
  49 static int pm8001_find_tag(struct sas_task *task, u32 *tag)
  50 {
  51         if (task->lldd_task) {
  52                 struct pm8001_ccb_info *ccb;
  53                 ccb = task->lldd_task;
  54                 *tag = ccb->ccb_tag;
  55                 return 1;
  56         }
  57         return 0;
  58 }
  59
  60 /**
  61   * pm8001_tag_free - free the no more needed tag
  62   * @pm8001_ha: our hba struct
  63   * @tag: the found tag associated with the task
  64   */
  65 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
  66 {
  67         void *bitmap = pm8001_ha->tags;
  68         clear_bit(tag, bitmap);
  69 }
  70
  71 /**
  72   * pm8001_tag_alloc - allocate a empty tag for task used.
  73   * @pm8001_ha: our hba struct
  74   * @tag_out: the found empty tag .
  75   */
  76 inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
  77 {
  78         unsigned int tag;
  79         void *bitmap = pm8001_ha->tags;
  80         unsigned long flags;
  81
  82         spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
  83         tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
  84         if (tag >= pm8001_ha->tags_num) {
  85                 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  86                 return -SAS_QUEUE_FULL;
  87         }
  88         set_bit(tag, bitmap);
  89         spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  90         *tag_out = tag;
  91         return 0;
  92 }
  93
  94 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
  95 {
  96         int i;
  97         for (i = 0; i < pm8001_ha->tags_num; ++i)
  98                 pm8001_tag_free(pm8001_ha, i);
  99 }
 100
 101  /**
 102   * pm8001_mem_alloc - allocate memory for pm8001.
 103   * @pdev: pci device.
 104   * @virt_addr: the allocated virtual address
 105   * @pphys_addr_hi: the physical address high byte address.
 106   * @pphys_addr_lo: the physical address low byte address.
 107   * @mem_size: memory size.
 108   */
 109 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
 110         dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
 111         u32 *pphys_addr_lo, u32 mem_size, u32 align)
 112 {
 113         caddr_t mem_virt_alloc;
 114         dma_addr_t mem_dma_handle;
 115         u64 phys_align;
 116         u64 align_offset = 0;
 117         if (align)
 118                 align_offset = (dma_addr_t)align - 1;
 119         mem_virt_alloc = pci_zalloc_consistent(pdev, mem_size + align,
 120                                                &mem_dma_handle);
 121         if (!mem_virt_alloc) {
 122                 pm8001_printk("memory allocation error\n");
 123                 return -1;
 124         }
 125         *pphys_addr = mem_dma_handle;
 126         phys_align = (*pphys_addr + align_offset) & ~align_offset;
 127         *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
 128         *pphys_addr_hi = upper_32_bits(phys_align);
 129         *pphys_addr_lo = lower_32_bits(phys_align);
 130         return 0;
 131 }
 132 /**
 133   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 134   * find out our hba struct.
 135   * @dev: the domain device which from sas layer.
 136   */
 137 static
 138 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 139 {
 140         struct sas_ha_struct *sha = dev->port->ha;
 141         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 142         return pm8001_ha;
 143 }
 144
 145 /**
 146   * pm8001_phy_control - this function should be registered to
 147   * sas_domain_function_template to provide libsas used, note: this is just
 148   * control the HBA phy rather than other expander phy if you want control
 149   * other phy, you should use SMP command.
 150   * @sas_phy: which phy in HBA phys.
 151   * @func: the operation.
 152   * @funcdata: always NULL.
 153   */
 154 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 155         void *funcdata)
 156 {
 157         int rc = 0, phy_id = sas_phy->id;
 158         struct pm8001_hba_info *pm8001_ha = NULL;
 159         struct sas_phy_linkrates *rates;
 160         DECLARE_COMPLETION_ONSTACK(completion);
 161         unsigned long flags;
 162         pm8001_ha = sas_phy->ha->lldd_ha;
 163         pm8001_ha->phy[phy_id].enable_completion = &completion;
 164         switch (func) {
 165         case PHY_FUNC_SET_LINK_RATE:
 166                 rates = funcdata;
 167                 if (rates->minimum_linkrate) {
 168                         pm8001_ha->phy[phy_id].minimum_linkrate =
 169                                 rates->minimum_linkrate;
 170                 }
 171                 if (rates->maximum_linkrate) {
 172                         pm8001_ha->phy[phy_id].maximum_linkrate =
 173                                 rates->maximum_linkrate;
 174                 }
 175                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 176                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 177                         wait_for_completion(&completion);
 178                 }
 179                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 180                                               PHY_LINK_RESET);
 181                 break;
 182         case PHY_FUNC_HARD_RESET:
 183                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 184                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 185                         wait_for_completion(&completion);
 186                 }
 187                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 188                                               PHY_HARD_RESET);
 189                 break;
 190         case PHY_FUNC_LINK_RESET:
 191                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 192                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 193                         wait_for_completion(&completion);
 194                 }
 195                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 196                                               PHY_LINK_RESET);
 197                 break;
 198         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 199                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 200                                               PHY_LINK_RESET);
 201                 break;
 202         case PHY_FUNC_DISABLE:
 203                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 204                 break;
 205         case PHY_FUNC_GET_EVENTS:
 206                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 207                 if (pm8001_ha->chip_id == chip_8001) {
 208                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 209                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 210                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 211                                 return -EINVAL;
 212                         }
 213                 }
 214                 {
 215                         struct sas_phy *phy = sas_phy->phy;
 216                         uint32_t *qp = (uint32_t *)(((char *)
 217                                 pm8001_ha->io_mem[2].memvirtaddr)
 218                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 219
 220                         phy->invalid_dword_count = qp[0];
 221                         phy->running_disparity_error_count = qp[1];
 222                         phy->loss_of_dword_sync_count = qp[3];
 223                         phy->phy_reset_problem_count = qp[4];
 224                 }
 225                 if (pm8001_ha->chip_id == chip_8001)
 226                         pm8001_bar4_shift(pm8001_ha, 0);
 227                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 228                 return 0;
 229         default:
 230                 rc = -EOPNOTSUPP;
 231         }
 232         msleep(300);
 233         return rc;
 234 }
 235
 236 /**
 237   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 238   * command to HBA.
 239   * @shost: the scsi host data.
 240   */
 241 void pm8001_scan_start(struct Scsi_Host *shost)
 242 {
 243         int i;
 244         struct pm8001_hba_info *pm8001_ha;
 245         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 246         pm8001_ha = sha->lldd_ha;
 247         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 248         if (pm8001_ha->chip_id == chip_8001)
 249                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 250         for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
 251                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 252 }
 253
 254 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 255 {
 256         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 257
 258         /* give the phy enabling interrupt event time to come in (1s
 259         * is empirically about all it takes) */
 260         if (time < HZ)
 261                 return 0;
 262         /* Wait for discovery to finish */
 263         sas_drain_work(ha);
 264         return 1;
 265 }
 266
 267 /**
 268   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 269   * @pm8001_ha: our hba card information
 270   * @ccb: the ccb which attached to smp task
 271   */
 272 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 273         struct pm8001_ccb_info *ccb)
 274 {
 275         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 276 }
 277
 278 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 279 {
 280         struct ata_queued_cmd *qc = task->uldd_task;
 281         if (qc) {
 282                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 283                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 284                         *tag = qc->tag;
 285                         return 1;
 286                 }
 287         }
 288         return 0;
 289 }
 290
 291 /**
 292   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 293   * @pm8001_ha: our hba card information
 294   * @ccb: the ccb which attached to sata task
 295   */
 296 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 297         struct pm8001_ccb_info *ccb)
 298 {
 299         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 300 }
 301
 302 /**
 303   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 304   * @pm8001_ha: our hba card information
 305   * @ccb: the ccb which attached to TM
 306   * @tmf: the task management IU
 307   */
 308 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 309         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 310 {
 311         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 312 }
 313
 314 /**
 315   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 316   * @pm8001_ha: our hba card information
 317   * @ccb: the ccb which attached to ssp task
 318   */
 319 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 320         struct pm8001_ccb_info *ccb)
 321 {
 322         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 323 }
 324
 325  /* Find the local port id that's attached to this device */
 326 static int sas_find_local_port_id(struct domain_device *dev)
 327 {
 328         struct domain_device *pdev = dev->parent;
 329
 330         /* Directly attached device */
 331         if (!pdev)
 332                 return dev->port->id;
 333         while (pdev) {
 334                 struct domain_device *pdev_p = pdev->parent;
 335                 if (!pdev_p)
 336                         return pdev->port->id;
 337                 pdev = pdev->parent;
 338         }
 339         return 0;
 340 }
 341
 342 /**
 343   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 344   * @task: the task to be execute.
 345   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 346   * we always execute one one time.
 347   * @gfp_flags: gfp_flags.
 348   * @is_tmf: if it is task management task.
 349   * @tmf: the task management IU
 350   */
 351 #define DEV_IS_GONE(pm8001_dev) \
 352         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 353 static int pm8001_task_exec(struct sas_task *task,
 354         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 355 {
 356         struct domain_device *dev = task->dev;
 357         struct pm8001_hba_info *pm8001_ha;
 358         struct pm8001_device *pm8001_dev;
 359         struct pm8001_port *port = NULL;
 360         struct sas_task *t = task;
 361         struct pm8001_ccb_info *ccb;
 362         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 363         unsigned long flags = 0;
 364
 365         if (!dev->port) {
 366                 struct task_status_struct *tsm = &t->task_status;
 367                 tsm->resp = SAS_TASK_UNDELIVERED;
 368                 tsm->stat = SAS_PHY_DOWN;
 369                 if (dev->dev_type != SAS_SATA_DEV)
 370                         t->task_done(t);
 371                 return 0;
 372         }
 373         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 374         if (pm8001_ha->controller_fatal_error) {
 375                 struct task_status_struct *ts = &t->task_status;
 376
 377                 ts->resp = SAS_TASK_UNDELIVERED;
 378                 t->task_done(t);
 379                 return 0;
 380         }
 381         PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 382         spin_lock_irqsave(&pm8001_ha->lock, flags);
 383         do {
 384                 dev = t->dev;
 385                 pm8001_dev = dev->lldd_dev;
 386                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 387                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 388                         if (sas_protocol_ata(t->task_proto)) {
 389                                 struct task_status_struct *ts = &t->task_status;
 390                                 ts->resp = SAS_TASK_UNDELIVERED;
 391                                 ts->stat = SAS_PHY_DOWN;
 392
 393                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 394                                 t->task_done(t);
 395                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 396                                 continue;
 397                         } else {
 398                                 struct task_status_struct *ts = &t->task_status;
 399                                 ts->resp = SAS_TASK_UNDELIVERED;
 400                                 ts->stat = SAS_PHY_DOWN;
 401                                 t->task_done(t);
 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         } while (0);
 464         rc = 0;
 465         goto out_done;
 466
 467 err_out_tag:
 468         pm8001_tag_free(pm8001_ha, tag);
 469 err_out:
 470         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 471         if (!sas_protocol_ata(t->task_proto))
 472                 if (n_elem)
 473                         dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
 474                                 t->data_dir);
 475 out_done:
 476         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 477         return rc;
 478 }
 479
 480 /**
 481   * pm8001_queue_command - register for upper layer used, all IO commands sent
 482   * to HBA are from this interface.
 483   * @task: the task to be execute.
 484   * @gfp_flags: gfp_flags
 485   */
 486 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 487 {
 488         return pm8001_task_exec(task, gfp_flags, 0, NULL);
 489 }
 490
 491 /**
 492   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 493   * @pm8001_ha: our hba card information
 494   * @ccb: the ccb which attached to ssp task
 495   * @task: the task to be free.
 496   * @ccb_idx: ccb index.
 497   */
 498 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 499         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 500 {
 501         if (!ccb->task)
 502                 return;
 503         if (!sas_protocol_ata(task->task_proto))
 504                 if (ccb->n_elem)
 505                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 506                                 task->num_scatter, task->data_dir);
 507
 508         switch (task->task_proto) {
 509         case SAS_PROTOCOL_SMP:
 510                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 511                         PCI_DMA_FROMDEVICE);
 512                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 513                         PCI_DMA_TODEVICE);
 514                 break;
 515
 516         case SAS_PROTOCOL_SATA:
 517         case SAS_PROTOCOL_STP:
 518         case SAS_PROTOCOL_SSP:
 519         default:
 520                 /* do nothing */
 521                 break;
 522         }
 523         task->lldd_task = NULL;
 524         ccb->task = NULL;
 525         ccb->ccb_tag = 0xFFFFFFFF;
 526         ccb->open_retry = 0;
 527         pm8001_tag_free(pm8001_ha, ccb_idx);
 528 }
 529
 530  /**
 531   * pm8001_alloc_dev - find a empty pm8001_device
 532   * @pm8001_ha: our hba card information
 533   */
 534 struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 535 {
 536         u32 dev;
 537         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 538                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 539                         pm8001_ha->devices[dev].id = dev;
 540                         return &pm8001_ha->devices[dev];
 541                 }
 542         }
 543         if (dev == PM8001_MAX_DEVICES) {
 544                 PM8001_FAIL_DBG(pm8001_ha,
 545                         pm8001_printk("max support %d devices, ignore ..\n",
 546                         PM8001_MAX_DEVICES));
 547         }
 548         return NULL;
 549 }
 550 /**
 551   * pm8001_find_dev - find a matching pm8001_device
 552   * @pm8001_ha: our hba card information
 553   */
 554 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 555                                         u32 device_id)
 556 {
 557         u32 dev;
 558         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 559                 if (pm8001_ha->devices[dev].device_id == device_id)
 560                         return &pm8001_ha->devices[dev];
 561         }
 562         if (dev == PM8001_MAX_DEVICES) {
 563                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 564                                 "DEVICE FOUND !!!\n"));
 565         }
 566         return NULL;
 567 }
 568
 569 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 570 {
 571         u32 id = pm8001_dev->id;
 572         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 573         pm8001_dev->id = id;
 574         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 575         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 576         pm8001_dev->sas_device = NULL;
 577 }
 578
 579 /**
 580   * pm8001_dev_found_notify - libsas notify a device is found.
 581   * @dev: the device structure which sas layer used.
 582   *
 583   * when libsas find a sas domain device, it should tell the LLDD that
 584   * device is found, and then LLDD register this device to HBA firmware
 585   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 586   * device ID(according to device's sas address) and returned it to LLDD. From
 587   * now on, we communicate with HBA FW with the device ID which HBA assigned
 588   * rather than sas address. it is the necessary step for our HBA but it is
 589   * the optional for other HBA driver.
 590   */
 591 static int pm8001_dev_found_notify(struct domain_device *dev)
 592 {
 593         unsigned long flags = 0;
 594         int res = 0;
 595         struct pm8001_hba_info *pm8001_ha = NULL;
 596         struct domain_device *parent_dev = dev->parent;
 597         struct pm8001_device *pm8001_device;
 598         DECLARE_COMPLETION_ONSTACK(completion);
 599         u32 flag = 0;
 600         pm8001_ha = pm8001_find_ha_by_dev(dev);
 601         spin_lock_irqsave(&pm8001_ha->lock, flags);
 602
 603         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 604         if (!pm8001_device) {
 605                 res = -1;
 606                 goto found_out;
 607         }
 608         pm8001_device->sas_device = dev;
 609         dev->lldd_dev = pm8001_device;
 610         pm8001_device->dev_type = dev->dev_type;
 611         pm8001_device->dcompletion = &completion;
 612         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 613                 int phy_id;
 614                 struct ex_phy *phy;
 615                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 616                 phy_id++) {
 617                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 618                         if (SAS_ADDR(phy->attached_sas_addr)
 619                                 == SAS_ADDR(dev->sas_addr)) {
 620                                 pm8001_device->attached_phy = phy_id;
 621                                 break;
 622                         }
 623                 }
 624                 if (phy_id == parent_dev->ex_dev.num_phys) {
 625                         PM8001_FAIL_DBG(pm8001_ha,
 626                         pm8001_printk("Error: no attached dev:%016llx"
 627                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 628                                 SAS_ADDR(parent_dev->sas_addr)));
 629                         res = -1;
 630                 }
 631         } else {
 632                 if (dev->dev_type == SAS_SATA_DEV) {
 633                         pm8001_device->attached_phy =
 634                                 dev->rphy->identify.phy_identifier;
 635                                 flag = 1; /* directly sata*/
 636                 }
 637         } /*register this device to HBA*/
 638         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 639         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 640         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 641         wait_for_completion(&completion);
 642         if (dev->dev_type == SAS_END_DEVICE)
 643                 msleep(50);
 644         pm8001_ha->flags = PM8001F_RUN_TIME;
 645         return 0;
 646 found_out:
 647         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 648         return res;
 649 }
 650
 651 int pm8001_dev_found(struct domain_device *dev)
 652 {
 653         return pm8001_dev_found_notify(dev);
 654 }
 655
 656 void pm8001_task_done(struct sas_task *task)
 657 {
 658         if (!del_timer(&task->slow_task->timer))
 659                 return;
 660         complete(&task->slow_task->completion);
 661 }
 662
 663 static void pm8001_tmf_timedout(unsigned long data)
 664 {
 665         struct sas_task *task = (struct sas_task *)data;
 666
 667         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 668         complete(&task->slow_task->completion);
 669 }
 670
 671 #define PM8001_TASK_TIMEOUT 20
 672 /**
 673   * pm8001_exec_internal_tmf_task - execute some task management commands.
 674   * @dev: the wanted device.
 675   * @tmf: which task management wanted to be take.
 676   * @para_len: para_len.
 677   * @parameter: ssp task parameter.
 678   *
 679   * when errors or exception happened, we may want to do something, for example
 680   * abort the issued task which result in this execption, it is done by calling
 681   * this function, note it is also with the task execute interface.
 682   */
 683 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 684         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 685 {
 686         int res, retry;
 687         struct sas_task *task = NULL;
 688         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 689         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 690         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 691
 692         for (retry = 0; retry < 3; retry++) {
 693                 task = sas_alloc_slow_task(GFP_KERNEL);
 694                 if (!task)
 695                         return -ENOMEM;
 696
 697                 task->dev = dev;
 698                 task->task_proto = dev->tproto;
 699                 memcpy(&task->ssp_task, parameter, para_len);
 700                 task->task_done = pm8001_task_done;
 701                 task->slow_task->timer.data = (unsigned long)task;
 702                 task->slow_task->timer.function = pm8001_tmf_timedout;
 703                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 704                 add_timer(&task->slow_task->timer);
 705
 706                 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 707
 708                 if (res) {
 709                         del_timer(&task->slow_task->timer);
 710                         PM8001_FAIL_DBG(pm8001_ha,
 711                                 pm8001_printk("Executing internal task "
 712                                 "failed\n"));
 713                         goto ex_err;
 714                 }
 715                 wait_for_completion(&task->slow_task->completion);
 716                 if (pm8001_ha->chip_id != chip_8001) {
 717                         pm8001_dev->setds_completion = &completion_setstate;
 718                                 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 719                                         pm8001_dev, 0x01);
 720                         wait_for_completion(&completion_setstate);
 721                 }
 722                 res = -TMF_RESP_FUNC_FAILED;
 723                 /* Even TMF timed out, return direct. */
 724                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 725                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 726                                 PM8001_FAIL_DBG(pm8001_ha,
 727                                         pm8001_printk("TMF task[%x]timeout.\n",
 728                                         tmf->tmf));
 729                                 goto ex_err;
 730                         }
 731                 }
 732
 733                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 734                         task->task_status.stat == SAM_STAT_GOOD) {
 735                         res = TMF_RESP_FUNC_COMPLETE;
 736                         break;
 737                 }
 738
 739                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 740                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 741                         /* no error, but return the number of bytes of
 742                         * underrun */
 743                         res = task->task_status.residual;
 744                         break;
 745                 }
 746
 747                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 748                         task->task_status.stat == SAS_DATA_OVERRUN) {
 749                         PM8001_FAIL_DBG(pm8001_ha,
 750                                 pm8001_printk("Blocked task error.\n"));
 751                         res = -EMSGSIZE;
 752                         break;
 753                 } else {
 754                         PM8001_EH_DBG(pm8001_ha,
 755                                 pm8001_printk(" Task to dev %016llx response:"
 756                                 "0x%x status 0x%x\n",
 757                                 SAS_ADDR(dev->sas_addr),
 758                                 task->task_status.resp,
 759                                 task->task_status.stat));
 760                         sas_free_task(task);
 761                         task = NULL;
 762                 }
 763         }
 764 ex_err:
 765         BUG_ON(retry == 3 && task != NULL);
 766         sas_free_task(task);
 767         return res;
 768 }
 769
 770 static int
 771 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 772         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 773         u32 task_tag)
 774 {
 775         int res, retry;
 776         u32 ccb_tag;
 777         struct pm8001_ccb_info *ccb;
 778         struct sas_task *task = NULL;
 779
 780         for (retry = 0; retry < 3; retry++) {
 781                 task = sas_alloc_slow_task(GFP_KERNEL);
 782                 if (!task)
 783                         return -ENOMEM;
 784
 785                 task->dev = dev;
 786                 task->task_proto = dev->tproto;
 787                 task->task_done = pm8001_task_done;
 788                 task->slow_task->timer.data = (unsigned long)task;
 789                 task->slow_task->timer.function = pm8001_tmf_timedout;
 790                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 791                 add_timer(&task->slow_task->timer);
 792
 793                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 794                 if (res)
 795                         return res;
 796                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 797                 ccb->device = pm8001_dev;
 798                 ccb->ccb_tag = ccb_tag;
 799                 ccb->task = task;
 800                 ccb->n_elem = 0;
 801
 802                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 803                         pm8001_dev, flag, task_tag, ccb_tag);
 804
 805                 if (res) {
 806                         del_timer(&task->slow_task->timer);
 807                         PM8001_FAIL_DBG(pm8001_ha,
 808                                 pm8001_printk("Executing internal task "
 809                                 "failed\n"));
 810                         goto ex_err;
 811                 }
 812                 wait_for_completion(&task->slow_task->completion);
 813                 res = TMF_RESP_FUNC_FAILED;
 814                 /* Even TMF timed out, return direct. */
 815                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 816                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 817                                 PM8001_FAIL_DBG(pm8001_ha,
 818                                         pm8001_printk("TMF task timeout.\n"));
 819                                 goto ex_err;
 820                         }
 821                 }
 822
 823                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 824                         task->task_status.stat == SAM_STAT_GOOD) {
 825                         res = TMF_RESP_FUNC_COMPLETE;
 826                         break;
 827
 828                 } else {
 829                         PM8001_EH_DBG(pm8001_ha,
 830                                 pm8001_printk(" Task to dev %016llx response: "
 831                                         "0x%x status 0x%x\n",
 832                                 SAS_ADDR(dev->sas_addr),
 833                                 task->task_status.resp,
 834                                 task->task_status.stat));
 835                         sas_free_task(task);
 836                         task = NULL;
 837                 }
 838         }
 839 ex_err:
 840         BUG_ON(retry == 3 && task != NULL);
 841         sas_free_task(task);
 842         return res;
 843 }
 844
 845 /**
 846   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 847   * @dev: the device structure which sas layer used.
 848   */
 849 static void pm8001_dev_gone_notify(struct domain_device *dev)
 850 {
 851         unsigned long flags = 0;
 852         struct pm8001_hba_info *pm8001_ha;
 853         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 854
 855         pm8001_ha = pm8001_find_ha_by_dev(dev);
 856         spin_lock_irqsave(&pm8001_ha->lock, flags);
 857         if (pm8001_dev) {
 858                 u32 device_id = pm8001_dev->device_id;
 859
 860                 PM8001_DISC_DBG(pm8001_ha,
 861                         pm8001_printk("found dev[%d:%x] is gone.\n",
 862                         pm8001_dev->device_id, pm8001_dev->dev_type));
 863                 if (pm8001_dev->running_req) {
 864                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 865                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 866                                 dev, 1, 0);
 867                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 868                 }
 869                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 870                 pm8001_free_dev(pm8001_dev);
 871         } else {
 872                 PM8001_DISC_DBG(pm8001_ha,
 873                         pm8001_printk("Found dev has gone.\n"));
 874         }
 875         dev->lldd_dev = NULL;
 876         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 877 }
 878
 879 void pm8001_dev_gone(struct domain_device *dev)
 880 {
 881         pm8001_dev_gone_notify(dev);
 882 }
 883
 884 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 885         u8 *lun, struct pm8001_tmf_task *tmf)
 886 {
 887         struct sas_ssp_task ssp_task;
 888         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 889                 return TMF_RESP_FUNC_ESUPP;
 890
 891         strncpy((u8 *)&ssp_task.LUN, lun, 8);
 892         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 893                 tmf);
 894 }
 895
 896 /* retry commands by ha, by task and/or by device */
 897 void pm8001_open_reject_retry(
 898         struct pm8001_hba_info *pm8001_ha,
 899         struct sas_task *task_to_close,
 900         struct pm8001_device *device_to_close)
 901 {
 902         int i;
 903         unsigned long flags;
 904
 905         if (pm8001_ha == NULL)
 906                 return;
 907
 908         spin_lock_irqsave(&pm8001_ha->lock, flags);
 909
 910         for (i = 0; i < PM8001_MAX_CCB; i++) {
 911                 struct sas_task *task;
 912                 struct task_status_struct *ts;
 913                 struct pm8001_device *pm8001_dev;
 914                 unsigned long flags1;
 915                 u32 tag;
 916                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 917
 918                 pm8001_dev = ccb->device;
 919                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 920                         continue;
 921                 if (!device_to_close) {
 922                         uintptr_t d = (uintptr_t)pm8001_dev
 923                                         - (uintptr_t)&pm8001_ha->devices;
 924                         if (((d % sizeof(*pm8001_dev)) != 0)
 925                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 926                                 continue;
 927                 } else if (pm8001_dev != device_to_close)
 928                         continue;
 929                 tag = ccb->ccb_tag;
 930                 if (!tag || (tag == 0xFFFFFFFF))
 931                         continue;
 932                 task = ccb->task;
 933                 if (!task || !task->task_done)
 934                         continue;
 935                 if (task_to_close && (task != task_to_close))
 936                         continue;
 937                 ts = &task->task_status;
 938                 ts->resp = SAS_TASK_COMPLETE;
 939                 /* Force the midlayer to retry */
 940                 ts->stat = SAS_OPEN_REJECT;
 941                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 942                 if (pm8001_dev)
 943                         pm8001_dev->running_req--;
 944                 spin_lock_irqsave(&task->task_state_lock, flags1);
 945                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 946                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 947                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 948                 if (unlikely((task->task_state_flags
 949                                 & SAS_TASK_STATE_ABORTED))) {
 950                         spin_unlock_irqrestore(&task->task_state_lock,
 951                                 flags1);
 952                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 953                 } else {
 954                         spin_unlock_irqrestore(&task->task_state_lock,
 955                                 flags1);
 956                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 957                         mb();/* in order to force CPU ordering */
 958                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 959                         task->task_done(task);
 960                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 961                 }
 962         }
 963
 964         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 965 }
 966
 967 /**
 968   * Standard mandates link reset for ATA  (type 0) and hard reset for
 969   * SSP (type 1) , only for RECOVERY
 970   */
 971 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 972 {
 973         int rc = TMF_RESP_FUNC_FAILED;
 974         struct pm8001_device *pm8001_dev;
 975         struct pm8001_hba_info *pm8001_ha;
 976         struct sas_phy *phy;
 977
 978         if (!dev || !dev->lldd_dev)
 979                 return -ENODEV;
 980
 981         pm8001_dev = dev->lldd_dev;
 982         pm8001_ha = pm8001_find_ha_by_dev(dev);
 983         phy = sas_get_local_phy(dev);
 984
 985         if (dev_is_sata(dev)) {
 986                 if (scsi_is_sas_phy_local(phy)) {
 987                         rc = 0;
 988                         goto out;
 989                 }
 990                 rc = sas_phy_reset(phy, 1);
 991                 if (rc) {
 992                         PM8001_EH_DBG(pm8001_ha,
 993                         pm8001_printk("phy reset failed for device %x\n"
 994                         "with rc %d\n", pm8001_dev->device_id, rc));
 995                         rc = TMF_RESP_FUNC_FAILED;
 996                         goto out;
 997                 }
 998                 msleep(2000);
 999                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1000                         dev, 1, 0);
1001                 if (rc) {
1002                         PM8001_EH_DBG(pm8001_ha,
1003                         pm8001_printk("task abort failed %x\n"
1004                         "with rc %d\n", pm8001_dev->device_id, rc));
1005                         rc = TMF_RESP_FUNC_FAILED;
1006                 }
1007         } else {
1008                 rc = sas_phy_reset(phy, 1);
1009                 msleep(2000);
1010         }
1011         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1012                 pm8001_dev->device_id, rc));
1013  out:
1014         sas_put_local_phy(phy);
1015         return rc;
1016 }
1017
1018 /*
1019 * This function handle the IT_NEXUS_XXX event or completion
1020 * status code for SSP/SATA/SMP I/O request.
1021 */
1022 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1023 {
1024         int rc = TMF_RESP_FUNC_FAILED;
1025         struct pm8001_device *pm8001_dev;
1026         struct pm8001_hba_info *pm8001_ha;
1027         struct sas_phy *phy;
1028         u32 device_id = 0;
1029
1030         if (!dev || !dev->lldd_dev)
1031                 return -1;
1032
1033         pm8001_dev = dev->lldd_dev;
1034         device_id = pm8001_dev->device_id;
1035         pm8001_ha = pm8001_find_ha_by_dev(dev);
1036
1037         PM8001_EH_DBG(pm8001_ha,
1038                         pm8001_printk("I_T_Nexus handler invoked !!"));
1039
1040         phy = sas_get_local_phy(dev);
1041
1042         if (dev_is_sata(dev)) {
1043                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1044                 if (scsi_is_sas_phy_local(phy)) {
1045                         rc = 0;
1046                         goto out;
1047                 }
1048                 /* send internal ssp/sata/smp abort command to FW */
1049                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1050                                                         dev, 1, 0);
1051                 msleep(100);
1052
1053                 /* deregister the target device */
1054                 pm8001_dev_gone_notify(dev);
1055                 msleep(200);
1056
1057                 /*send phy reset to hard reset target */
1058                 rc = sas_phy_reset(phy, 1);
1059                 msleep(2000);
1060                 pm8001_dev->setds_completion = &completion_setstate;
1061
1062                 wait_for_completion(&completion_setstate);
1063         } else {
1064                 /* send internal ssp/sata/smp abort command to FW */
1065                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1066                                                         dev, 1, 0);
1067                 msleep(100);
1068
1069                 /* deregister the target device */
1070                 pm8001_dev_gone_notify(dev);
1071                 msleep(200);
1072
1073                 /*send phy reset to hard reset target */
1074                 rc = sas_phy_reset(phy, 1);
1075                 msleep(2000);
1076         }
1077         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1078                 pm8001_dev->device_id, rc));
1079 out:
1080         sas_put_local_phy(phy);
1081
1082         return rc;
1083 }
1084 /* mandatory SAM-3, the task reset the specified LUN*/
1085 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1086 {
1087         int rc = TMF_RESP_FUNC_FAILED;
1088         struct pm8001_tmf_task tmf_task;
1089         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1090         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1091         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1092         if (dev_is_sata(dev)) {
1093                 struct sas_phy *phy = sas_get_local_phy(dev);
1094                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1095                         dev, 1, 0);
1096                 rc = sas_phy_reset(phy, 1);
1097                 sas_put_local_phy(phy);
1098                 pm8001_dev->setds_completion = &completion_setstate;
1099                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1100                         pm8001_dev, 0x01);
1101                 wait_for_completion(&completion_setstate);
1102         } else {
1103                 tmf_task.tmf = TMF_LU_RESET;
1104                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1105         }
1106         /* If failed, fall-through I_T_Nexus reset */
1107         PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1108                 pm8001_dev->device_id, rc));
1109         return rc;
1110 }
1111
1112 /* optional SAM-3 */
1113 int pm8001_query_task(struct sas_task *task)
1114 {
1115         u32 tag = 0xdeadbeef;
1116         int i = 0;
1117         struct scsi_lun lun;
1118         struct pm8001_tmf_task tmf_task;
1119         int rc = TMF_RESP_FUNC_FAILED;
1120         if (unlikely(!task || !task->lldd_task || !task->dev))
1121                 return rc;
1122
1123         if (task->task_proto & SAS_PROTOCOL_SSP) {
1124                 struct scsi_cmnd *cmnd = task->uldd_task;
1125                 struct domain_device *dev = task->dev;
1126                 struct pm8001_hba_info *pm8001_ha =
1127                         pm8001_find_ha_by_dev(dev);
1128
1129                 int_to_scsilun(cmnd->device->lun, &lun);
1130                 rc = pm8001_find_tag(task, &tag);
1131                 if (rc == 0) {
1132                         rc = TMF_RESP_FUNC_FAILED;
1133                         return rc;
1134                 }
1135                 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1136                 for (i = 0; i < 16; i++)
1137                         printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1138                 printk(KERN_INFO "]\n");
1139                 tmf_task.tmf =  TMF_QUERY_TASK;
1140                 tmf_task.tag_of_task_to_be_managed = tag;
1141
1142                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1143                 switch (rc) {
1144                 /* The task is still in Lun, release it then */
1145                 case TMF_RESP_FUNC_SUCC:
1146                         PM8001_EH_DBG(pm8001_ha,
1147                                 pm8001_printk("The task is still in Lun\n"));
1148                         break;
1149                 /* The task is not in Lun or failed, reset the phy */
1150                 case TMF_RESP_FUNC_FAILED:
1151                 case TMF_RESP_FUNC_COMPLETE:
1152                         PM8001_EH_DBG(pm8001_ha,
1153                         pm8001_printk("The task is not in Lun or failed,"
1154                         " reset the phy\n"));
1155                         break;
1156                 }
1157         }
1158         pm8001_printk(":rc= %d\n", rc);
1159         return rc;
1160 }
1161
1162 /*  mandatory SAM-3, still need free task/ccb info, abord the specified task */
1163 int pm8001_abort_task(struct sas_task *task)
1164 {
1165         unsigned long flags;
1166         u32 tag = 0xdeadbeef;
1167         u32 device_id;
1168         struct domain_device *dev ;
1169         struct pm8001_hba_info *pm8001_ha = NULL;
1170         struct pm8001_ccb_info *ccb;
1171         struct scsi_lun lun;
1172         struct pm8001_device *pm8001_dev;
1173         struct pm8001_tmf_task tmf_task;
1174         int rc = TMF_RESP_FUNC_FAILED;
1175         if (unlikely(!task || !task->lldd_task || !task->dev))
1176                 return rc;
1177         spin_lock_irqsave(&task->task_state_lock, flags);
1178         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1179                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1180                 rc = TMF_RESP_FUNC_COMPLETE;
1181                 goto out;
1182         }
1183         spin_unlock_irqrestore(&task->task_state_lock, flags);
1184         if (task->task_proto & SAS_PROTOCOL_SSP) {
1185                 struct scsi_cmnd *cmnd = task->uldd_task;
1186                 dev = task->dev;
1187                 ccb = task->lldd_task;
1188                 pm8001_dev = dev->lldd_dev;
1189                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1190                 int_to_scsilun(cmnd->device->lun, &lun);
1191                 rc = pm8001_find_tag(task, &tag);
1192                 if (rc == 0) {
1193                         printk(KERN_INFO "No such tag in %s\n", __func__);
1194                         rc = TMF_RESP_FUNC_FAILED;
1195                         return rc;
1196                 }
1197                 device_id = pm8001_dev->device_id;
1198                 PM8001_EH_DBG(pm8001_ha,
1199                         pm8001_printk("abort io to deviceid= %d\n", device_id));
1200                 tmf_task.tmf = TMF_ABORT_TASK;
1201                 tmf_task.tag_of_task_to_be_managed = tag;
1202                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1203                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1204                         pm8001_dev->sas_device, 0, tag);
1205         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1206                 task->task_proto & SAS_PROTOCOL_STP) {
1207                 dev = task->dev;
1208                 pm8001_dev = dev->lldd_dev;
1209                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1210                 rc = pm8001_find_tag(task, &tag);
1211                 if (rc == 0) {
1212                         printk(KERN_INFO "No such tag in %s\n", __func__);
1213                         rc = TMF_RESP_FUNC_FAILED;
1214                         return rc;
1215                 }
1216                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1217                         pm8001_dev->sas_device, 0, tag);
1218         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1219                 /* SMP */
1220                 dev = task->dev;
1221                 pm8001_dev = dev->lldd_dev;
1222                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1223                 rc = pm8001_find_tag(task, &tag);
1224                 if (rc == 0) {
1225                         printk(KERN_INFO "No such tag in %s\n", __func__);
1226                         rc = TMF_RESP_FUNC_FAILED;
1227                         return rc;
1228                 }
1229                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1230                         pm8001_dev->sas_device, 0, tag);
1231
1232         }
1233 out:
1234         if (rc != TMF_RESP_FUNC_COMPLETE)
1235                 pm8001_printk("rc= %d\n", rc);
1236         return rc;
1237 }
1238
1239 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1240 {
1241         int rc = TMF_RESP_FUNC_FAILED;
1242         struct pm8001_tmf_task tmf_task;
1243
1244         tmf_task.tmf = TMF_ABORT_TASK_SET;
1245         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1246         return rc;
1247 }
1248
1249 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1250 {
1251         int rc = TMF_RESP_FUNC_FAILED;
1252         struct pm8001_tmf_task tmf_task;
1253
1254         tmf_task.tmf = TMF_CLEAR_ACA;
1255         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1256
1257         return rc;
1258 }
1259
1260 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1261 {
1262         int rc = TMF_RESP_FUNC_FAILED;
1263         struct pm8001_tmf_task tmf_task;
1264         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1265         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1266
1267         PM8001_EH_DBG(pm8001_ha,
1268                 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1269                 pm8001_dev->device_id));
1270         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1271         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1272         return rc;
1273 }
1274