drivers/scsi/pm8001/pm8001

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
pm8001_find_tag
pm8001_tag_free
pm8001_tag_alloc
pm8001_tag_init
pm8001_mem_alloc
pm8001_find_ha_by_dev
pm8001_phy_control
pm8001_scan_start
pm8001_scan_finished
pm8001_task_prep_smp
pm8001_get_ncq_tag
pm8001_task_prep_ata
pm8001_task_prep_ssp_tm
pm8001_task_prep_ssp
sas_find_local_port_id
pm8001_task_exec
pm8001_queue_command
pm8001_ccb_task_free
pm8001_alloc_dev
pm8001_find_dev
pm8001_free_dev
pm8001_dev_found_notify
pm8001_dev_found
pm8001_task_done
pm8001_tmf_timedout
pm8001_exec_internal_tmf_task
pm8001_exec_internal_task_abort
pm8001_dev_gone_notify
pm8001_dev_gone
pm8001_issue_ssp_tmf
pm8001_open_reject_retry
pm8001_I_T_nexus_reset
pm8001_I_T_nexus_event_handler
pm8001_lu_reset
pm8001_query_task
pm8001_abort_task
pm8001_abort_task_set
pm8001_clear_aca
pm8001_clear_task_set
   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 = dma_alloc_coherent(&pdev->dev, mem_size + align,
 120                                             &mem_dma_handle, GFP_KERNEL);
 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         struct sas_ha_struct *sas_ha;
 161         struct pm8001_phy *phy;
 162         DECLARE_COMPLETION_ONSTACK(completion);
 163         unsigned long flags;
 164         pm8001_ha = sas_phy->ha->lldd_ha;
 165         phy = &pm8001_ha->phy[phy_id];
 166         pm8001_ha->phy[phy_id].enable_completion = &completion;
 167         switch (func) {
 168         case PHY_FUNC_SET_LINK_RATE:
 169                 rates = funcdata;
 170                 if (rates->minimum_linkrate) {
 171                         pm8001_ha->phy[phy_id].minimum_linkrate =
 172                                 rates->minimum_linkrate;
 173                 }
 174                 if (rates->maximum_linkrate) {
 175                         pm8001_ha->phy[phy_id].maximum_linkrate =
 176                                 rates->maximum_linkrate;
 177                 }
 178                 if (pm8001_ha->phy[phy_id].phy_state ==  PHY_LINK_DISABLE) {
 179                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 180                         wait_for_completion(&completion);
 181                 }
 182                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 183                                               PHY_LINK_RESET);
 184                 break;
 185         case PHY_FUNC_HARD_RESET:
 186                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 187                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 188                         wait_for_completion(&completion);
 189                 }
 190                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 191                                               PHY_HARD_RESET);
 192                 break;
 193         case PHY_FUNC_LINK_RESET:
 194                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 195                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 196                         wait_for_completion(&completion);
 197                 }
 198                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 199                                               PHY_LINK_RESET);
 200                 break;
 201         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 202                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 203                                               PHY_LINK_RESET);
 204                 break;
 205         case PHY_FUNC_DISABLE:
 206                 if (pm8001_ha->chip_id != chip_8001) {
 207                         if (pm8001_ha->phy[phy_id].phy_state ==
 208                                 PHY_STATE_LINK_UP_SPCV) {
 209                                 sas_ha = pm8001_ha->sas;
 210                                 sas_phy_disconnected(&phy->sas_phy);
 211                                 sas_ha->notify_phy_event(&phy->sas_phy,
 212                                         PHYE_LOSS_OF_SIGNAL);
 213                                 phy->phy_attached = 0;
 214                         }
 215                 } else {
 216                         if (pm8001_ha->phy[phy_id].phy_state ==
 217                                 PHY_STATE_LINK_UP_SPC) {
 218                                 sas_ha = pm8001_ha->sas;
 219                                 sas_phy_disconnected(&phy->sas_phy);
 220                                 sas_ha->notify_phy_event(&phy->sas_phy,
 221                                         PHYE_LOSS_OF_SIGNAL);
 222                                 phy->phy_attached = 0;
 223                         }
 224                 }
 225                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 226                 break;
 227         case PHY_FUNC_GET_EVENTS:
 228                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 229                 if (pm8001_ha->chip_id == chip_8001) {
 230                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 231                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 232                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 233                                 return -EINVAL;
 234                         }
 235                 }
 236                 {
 237                         struct sas_phy *phy = sas_phy->phy;
 238                         uint32_t *qp = (uint32_t *)(((char *)
 239                                 pm8001_ha->io_mem[2].memvirtaddr)
 240                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 241 
 242                         phy->invalid_dword_count = qp[0];
 243                         phy->running_disparity_error_count = qp[1];
 244                         phy->loss_of_dword_sync_count = qp[3];
 245                         phy->phy_reset_problem_count = qp[4];
 246                 }
 247                 if (pm8001_ha->chip_id == chip_8001)
 248                         pm8001_bar4_shift(pm8001_ha, 0);
 249                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 250                 return 0;
 251         default:
 252                 rc = -EOPNOTSUPP;
 253         }
 254         msleep(300);
 255         return rc;
 256 }
 257 
 258 /**
 259   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 260   * command to HBA.
 261   * @shost: the scsi host data.
 262   */
 263 void pm8001_scan_start(struct Scsi_Host *shost)
 264 {
 265         int i;
 266         struct pm8001_hba_info *pm8001_ha;
 267         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 268         pm8001_ha = sha->lldd_ha;
 269         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 270         if (pm8001_ha->chip_id == chip_8001)
 271                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 272         for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
 273                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 274 }
 275 
 276 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 277 {
 278         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 279 
 280         /* give the phy enabling interrupt event time to come in (1s
 281         * is empirically about all it takes) */
 282         if (time < HZ)
 283                 return 0;
 284         /* Wait for discovery to finish */
 285         sas_drain_work(ha);
 286         return 1;
 287 }
 288 
 289 /**
 290   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 291   * @pm8001_ha: our hba card information
 292   * @ccb: the ccb which attached to smp task
 293   */
 294 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 295         struct pm8001_ccb_info *ccb)
 296 {
 297         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 298 }
 299 
 300 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 301 {
 302         struct ata_queued_cmd *qc = task->uldd_task;
 303         if (qc) {
 304                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 305                     qc->tf.command == ATA_CMD_FPDMA_READ ||
 306                     qc->tf.command == ATA_CMD_FPDMA_RECV ||
 307                     qc->tf.command == ATA_CMD_FPDMA_SEND ||
 308                     qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
 309                         *tag = qc->tag;
 310                         return 1;
 311                 }
 312         }
 313         return 0;
 314 }
 315 
 316 /**
 317   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 318   * @pm8001_ha: our hba card information
 319   * @ccb: the ccb which attached to sata task
 320   */
 321 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 322         struct pm8001_ccb_info *ccb)
 323 {
 324         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 325 }
 326 
 327 /**
 328   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 329   * @pm8001_ha: our hba card information
 330   * @ccb: the ccb which attached to TM
 331   * @tmf: the task management IU
 332   */
 333 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 334         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 335 {
 336         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 337 }
 338 
 339 /**
 340   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 341   * @pm8001_ha: our hba card information
 342   * @ccb: the ccb which attached to ssp task
 343   */
 344 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 345         struct pm8001_ccb_info *ccb)
 346 {
 347         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 348 }
 349 
 350  /* Find the local port id that's attached to this device */
 351 static int sas_find_local_port_id(struct domain_device *dev)
 352 {
 353         struct domain_device *pdev = dev->parent;
 354 
 355         /* Directly attached device */
 356         if (!pdev)
 357                 return dev->port->id;
 358         while (pdev) {
 359                 struct domain_device *pdev_p = pdev->parent;
 360                 if (!pdev_p)
 361                         return pdev->port->id;
 362                 pdev = pdev->parent;
 363         }
 364         return 0;
 365 }
 366 
 367 /**
 368   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 369   * @task: the task to be execute.
 370   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 371   * we always execute one one time.
 372   * @gfp_flags: gfp_flags.
 373   * @is_tmf: if it is task management task.
 374   * @tmf: the task management IU
 375   */
 376 #define DEV_IS_GONE(pm8001_dev) \
 377         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 378 static int pm8001_task_exec(struct sas_task *task,
 379         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 380 {
 381         struct domain_device *dev = task->dev;
 382         struct pm8001_hba_info *pm8001_ha;
 383         struct pm8001_device *pm8001_dev;
 384         struct pm8001_port *port = NULL;
 385         struct sas_task *t = task;
 386         struct pm8001_ccb_info *ccb;
 387         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 388         unsigned long flags = 0;
 389 
 390         if (!dev->port) {
 391                 struct task_status_struct *tsm = &t->task_status;
 392                 tsm->resp = SAS_TASK_UNDELIVERED;
 393                 tsm->stat = SAS_PHY_DOWN;
 394                 if (dev->dev_type != SAS_SATA_DEV)
 395                         t->task_done(t);
 396                 return 0;
 397         }
 398         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 399         if (pm8001_ha->controller_fatal_error) {
 400                 struct task_status_struct *ts = &t->task_status;
 401 
 402                 ts->resp = SAS_TASK_UNDELIVERED;
 403                 t->task_done(t);
 404                 return 0;
 405         }
 406         PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 407         spin_lock_irqsave(&pm8001_ha->lock, flags);
 408         do {
 409                 dev = t->dev;
 410                 pm8001_dev = dev->lldd_dev;
 411                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 412                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 413                         if (sas_protocol_ata(t->task_proto)) {
 414                                 struct task_status_struct *ts = &t->task_status;
 415                                 ts->resp = SAS_TASK_UNDELIVERED;
 416                                 ts->stat = SAS_PHY_DOWN;
 417 
 418                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 419                                 t->task_done(t);
 420                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 421                                 continue;
 422                         } else {
 423                                 struct task_status_struct *ts = &t->task_status;
 424                                 ts->resp = SAS_TASK_UNDELIVERED;
 425                                 ts->stat = SAS_PHY_DOWN;
 426                                 t->task_done(t);
 427                                 continue;
 428                         }
 429                 }
 430                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 431                 if (rc)
 432                         goto err_out;
 433                 ccb = &pm8001_ha->ccb_info[tag];
 434 
 435                 if (!sas_protocol_ata(t->task_proto)) {
 436                         if (t->num_scatter) {
 437                                 n_elem = dma_map_sg(pm8001_ha->dev,
 438                                         t->scatter,
 439                                         t->num_scatter,
 440                                         t->data_dir);
 441                                 if (!n_elem) {
 442                                         rc = -ENOMEM;
 443                                         goto err_out_tag;
 444                                 }
 445                         }
 446                 } else {
 447                         n_elem = t->num_scatter;
 448                 }
 449 
 450                 t->lldd_task = ccb;
 451                 ccb->n_elem = n_elem;
 452                 ccb->ccb_tag = tag;
 453                 ccb->task = t;
 454                 ccb->device = pm8001_dev;
 455                 switch (t->task_proto) {
 456                 case SAS_PROTOCOL_SMP:
 457                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 458                         break;
 459                 case SAS_PROTOCOL_SSP:
 460                         if (is_tmf)
 461                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 462                                         ccb, tmf);
 463                         else
 464                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 465                         break;
 466                 case SAS_PROTOCOL_SATA:
 467                 case SAS_PROTOCOL_STP:
 468                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 469                         break;
 470                 default:
 471                         dev_printk(KERN_ERR, pm8001_ha->dev,
 472                                 "unknown sas_task proto: 0x%x\n",
 473                                 t->task_proto);
 474                         rc = -EINVAL;
 475                         break;
 476                 }
 477 
 478                 if (rc) {
 479                         PM8001_IO_DBG(pm8001_ha,
 480                                 pm8001_printk("rc is %x\n", rc));
 481                         goto err_out_tag;
 482                 }
 483                 /* TODO: select normal or high priority */
 484                 spin_lock(&t->task_state_lock);
 485                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 486                 spin_unlock(&t->task_state_lock);
 487                 pm8001_dev->running_req++;
 488         } while (0);
 489         rc = 0;
 490         goto out_done;
 491 
 492 err_out_tag:
 493         pm8001_tag_free(pm8001_ha, tag);
 494 err_out:
 495         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 496         if (!sas_protocol_ata(t->task_proto))
 497                 if (n_elem)
 498                         dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
 499                                 t->data_dir);
 500 out_done:
 501         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 502         return rc;
 503 }
 504 
 505 /**
 506   * pm8001_queue_command - register for upper layer used, all IO commands sent
 507   * to HBA are from this interface.
 508   * @task: the task to be execute.
 509   * @gfp_flags: gfp_flags
 510   */
 511 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 512 {
 513         return pm8001_task_exec(task, gfp_flags, 0, NULL);
 514 }
 515 
 516 /**
 517   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 518   * @pm8001_ha: our hba card information
 519   * @ccb: the ccb which attached to ssp task
 520   * @task: the task to be free.
 521   * @ccb_idx: ccb index.
 522   */
 523 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 524         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 525 {
 526         if (!ccb->task)
 527                 return;
 528         if (!sas_protocol_ata(task->task_proto))
 529                 if (ccb->n_elem)
 530                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 531                                 task->num_scatter, task->data_dir);
 532 
 533         switch (task->task_proto) {
 534         case SAS_PROTOCOL_SMP:
 535                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 536                         DMA_FROM_DEVICE);
 537                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 538                         DMA_TO_DEVICE);
 539                 break;
 540 
 541         case SAS_PROTOCOL_SATA:
 542         case SAS_PROTOCOL_STP:
 543         case SAS_PROTOCOL_SSP:
 544         default:
 545                 /* do nothing */
 546                 break;
 547         }
 548         task->lldd_task = NULL;
 549         ccb->task = NULL;
 550         ccb->ccb_tag = 0xFFFFFFFF;
 551         ccb->open_retry = 0;
 552         pm8001_tag_free(pm8001_ha, ccb_idx);
 553 }
 554 
 555  /**
 556   * pm8001_alloc_dev - find a empty pm8001_device
 557   * @pm8001_ha: our hba card information
 558   */
 559 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 560 {
 561         u32 dev;
 562         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 563                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 564                         pm8001_ha->devices[dev].id = dev;
 565                         return &pm8001_ha->devices[dev];
 566                 }
 567         }
 568         if (dev == PM8001_MAX_DEVICES) {
 569                 PM8001_FAIL_DBG(pm8001_ha,
 570                         pm8001_printk("max support %d devices, ignore ..\n",
 571                         PM8001_MAX_DEVICES));
 572         }
 573         return NULL;
 574 }
 575 /**
 576   * pm8001_find_dev - find a matching pm8001_device
 577   * @pm8001_ha: our hba card information
 578   */
 579 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 580                                         u32 device_id)
 581 {
 582         u32 dev;
 583         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 584                 if (pm8001_ha->devices[dev].device_id == device_id)
 585                         return &pm8001_ha->devices[dev];
 586         }
 587         if (dev == PM8001_MAX_DEVICES) {
 588                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 589                                 "DEVICE FOUND !!!\n"));
 590         }
 591         return NULL;
 592 }
 593 
 594 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 595 {
 596         u32 id = pm8001_dev->id;
 597         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 598         pm8001_dev->id = id;
 599         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 600         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 601         pm8001_dev->sas_device = NULL;
 602 }
 603 
 604 /**
 605   * pm8001_dev_found_notify - libsas notify a device is found.
 606   * @dev: the device structure which sas layer used.
 607   *
 608   * when libsas find a sas domain device, it should tell the LLDD that
 609   * device is found, and then LLDD register this device to HBA firmware
 610   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 611   * device ID(according to device's sas address) and returned it to LLDD. From
 612   * now on, we communicate with HBA FW with the device ID which HBA assigned
 613   * rather than sas address. it is the necessary step for our HBA but it is
 614   * the optional for other HBA driver.
 615   */
 616 static int pm8001_dev_found_notify(struct domain_device *dev)
 617 {
 618         unsigned long flags = 0;
 619         int res = 0;
 620         struct pm8001_hba_info *pm8001_ha = NULL;
 621         struct domain_device *parent_dev = dev->parent;
 622         struct pm8001_device *pm8001_device;
 623         DECLARE_COMPLETION_ONSTACK(completion);
 624         u32 flag = 0;
 625         pm8001_ha = pm8001_find_ha_by_dev(dev);
 626         spin_lock_irqsave(&pm8001_ha->lock, flags);
 627 
 628         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 629         if (!pm8001_device) {
 630                 res = -1;
 631                 goto found_out;
 632         }
 633         pm8001_device->sas_device = dev;
 634         dev->lldd_dev = pm8001_device;
 635         pm8001_device->dev_type = dev->dev_type;
 636         pm8001_device->dcompletion = &completion;
 637         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 638                 int phy_id;
 639                 struct ex_phy *phy;
 640                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 641                 phy_id++) {
 642                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 643                         if (SAS_ADDR(phy->attached_sas_addr)
 644                                 == SAS_ADDR(dev->sas_addr)) {
 645                                 pm8001_device->attached_phy = phy_id;
 646                                 break;
 647                         }
 648                 }
 649                 if (phy_id == parent_dev->ex_dev.num_phys) {
 650                         PM8001_FAIL_DBG(pm8001_ha,
 651                         pm8001_printk("Error: no attached dev:%016llx"
 652                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 653                                 SAS_ADDR(parent_dev->sas_addr)));
 654                         res = -1;
 655                 }
 656         } else {
 657                 if (dev->dev_type == SAS_SATA_DEV) {
 658                         pm8001_device->attached_phy =
 659                                 dev->rphy->identify.phy_identifier;
 660                         flag = 1; /* directly sata */
 661                 }
 662         } /*register this device to HBA*/
 663         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 664         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 665         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 666         wait_for_completion(&completion);
 667         if (dev->dev_type == SAS_END_DEVICE)
 668                 msleep(50);
 669         pm8001_ha->flags = PM8001F_RUN_TIME;
 670         return 0;
 671 found_out:
 672         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 673         return res;
 674 }
 675 
 676 int pm8001_dev_found(struct domain_device *dev)
 677 {
 678         return pm8001_dev_found_notify(dev);
 679 }
 680 
 681 void pm8001_task_done(struct sas_task *task)
 682 {
 683         if (!del_timer(&task->slow_task->timer))
 684                 return;
 685         complete(&task->slow_task->completion);
 686 }
 687 
 688 static void pm8001_tmf_timedout(struct timer_list *t)
 689 {
 690         struct sas_task_slow *slow = from_timer(slow, t, timer);
 691         struct sas_task *task = slow->task;
 692 
 693         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 694         complete(&task->slow_task->completion);
 695 }
 696 
 697 #define PM8001_TASK_TIMEOUT 20
 698 /**
 699   * pm8001_exec_internal_tmf_task - execute some task management commands.
 700   * @dev: the wanted device.
 701   * @tmf: which task management wanted to be take.
 702   * @para_len: para_len.
 703   * @parameter: ssp task parameter.
 704   *
 705   * when errors or exception happened, we may want to do something, for example
 706   * abort the issued task which result in this execption, it is done by calling
 707   * this function, note it is also with the task execute interface.
 708   */
 709 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 710         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 711 {
 712         int res, retry;
 713         struct sas_task *task = NULL;
 714         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 715         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 716         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 717 
 718         for (retry = 0; retry < 3; retry++) {
 719                 task = sas_alloc_slow_task(GFP_KERNEL);
 720                 if (!task)
 721                         return -ENOMEM;
 722 
 723                 task->dev = dev;
 724                 task->task_proto = dev->tproto;
 725                 memcpy(&task->ssp_task, parameter, para_len);
 726                 task->task_done = pm8001_task_done;
 727                 task->slow_task->timer.function = pm8001_tmf_timedout;
 728                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 729                 add_timer(&task->slow_task->timer);
 730 
 731                 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 732 
 733                 if (res) {
 734                         del_timer(&task->slow_task->timer);
 735                         PM8001_FAIL_DBG(pm8001_ha,
 736                                 pm8001_printk("Executing internal task "
 737                                 "failed\n"));
 738                         goto ex_err;
 739                 }
 740                 wait_for_completion(&task->slow_task->completion);
 741                 if (pm8001_ha->chip_id != chip_8001) {
 742                         pm8001_dev->setds_completion = &completion_setstate;
 743                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 744                                 pm8001_dev, 0x01);
 745                         wait_for_completion(&completion_setstate);
 746                 }
 747                 res = -TMF_RESP_FUNC_FAILED;
 748                 /* Even TMF timed out, return direct. */
 749                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 750                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 751                                 PM8001_FAIL_DBG(pm8001_ha,
 752                                         pm8001_printk("TMF task[%x]timeout.\n",
 753                                         tmf->tmf));
 754                                 goto ex_err;
 755                         }
 756                 }
 757 
 758                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 759                         task->task_status.stat == SAM_STAT_GOOD) {
 760                         res = TMF_RESP_FUNC_COMPLETE;
 761                         break;
 762                 }
 763 
 764                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 765                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 766                         /* no error, but return the number of bytes of
 767                         * underrun */
 768                         res = task->task_status.residual;
 769                         break;
 770                 }
 771 
 772                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 773                         task->task_status.stat == SAS_DATA_OVERRUN) {
 774                         PM8001_FAIL_DBG(pm8001_ha,
 775                                 pm8001_printk("Blocked task error.\n"));
 776                         res = -EMSGSIZE;
 777                         break;
 778                 } else {
 779                         PM8001_EH_DBG(pm8001_ha,
 780                                 pm8001_printk(" Task to dev %016llx response:"
 781                                 "0x%x status 0x%x\n",
 782                                 SAS_ADDR(dev->sas_addr),
 783                                 task->task_status.resp,
 784                                 task->task_status.stat));
 785                         sas_free_task(task);
 786                         task = NULL;
 787                 }
 788         }
 789 ex_err:
 790         BUG_ON(retry == 3 && task != NULL);
 791         sas_free_task(task);
 792         return res;
 793 }
 794 
 795 static int
 796 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 797         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 798         u32 task_tag)
 799 {
 800         int res, retry;
 801         u32 ccb_tag;
 802         struct pm8001_ccb_info *ccb;
 803         struct sas_task *task = NULL;
 804 
 805         for (retry = 0; retry < 3; retry++) {
 806                 task = sas_alloc_slow_task(GFP_KERNEL);
 807                 if (!task)
 808                         return -ENOMEM;
 809 
 810                 task->dev = dev;
 811                 task->task_proto = dev->tproto;
 812                 task->task_done = pm8001_task_done;
 813                 task->slow_task->timer.function = pm8001_tmf_timedout;
 814                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 815                 add_timer(&task->slow_task->timer);
 816 
 817                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 818                 if (res)
 819                         return res;
 820                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 821                 ccb->device = pm8001_dev;
 822                 ccb->ccb_tag = ccb_tag;
 823                 ccb->task = task;
 824                 ccb->n_elem = 0;
 825 
 826                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 827                         pm8001_dev, flag, task_tag, ccb_tag);
 828 
 829                 if (res) {
 830                         del_timer(&task->slow_task->timer);
 831                         PM8001_FAIL_DBG(pm8001_ha,
 832                                 pm8001_printk("Executing internal task "
 833                                 "failed\n"));
 834                         goto ex_err;
 835                 }
 836                 wait_for_completion(&task->slow_task->completion);
 837                 res = TMF_RESP_FUNC_FAILED;
 838                 /* Even TMF timed out, return direct. */
 839                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 840                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 841                                 PM8001_FAIL_DBG(pm8001_ha,
 842                                         pm8001_printk("TMF task timeout.\n"));
 843                                 goto ex_err;
 844                         }
 845                 }
 846 
 847                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 848                         task->task_status.stat == SAM_STAT_GOOD) {
 849                         res = TMF_RESP_FUNC_COMPLETE;
 850                         break;
 851 
 852                 } else {
 853                         PM8001_EH_DBG(pm8001_ha,
 854                                 pm8001_printk(" Task to dev %016llx response: "
 855                                         "0x%x status 0x%x\n",
 856                                 SAS_ADDR(dev->sas_addr),
 857                                 task->task_status.resp,
 858                                 task->task_status.stat));
 859                         sas_free_task(task);
 860                         task = NULL;
 861                 }
 862         }
 863 ex_err:
 864         BUG_ON(retry == 3 && task != NULL);
 865         sas_free_task(task);
 866         return res;
 867 }
 868 
 869 /**
 870   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 871   * @dev: the device structure which sas layer used.
 872   */
 873 static void pm8001_dev_gone_notify(struct domain_device *dev)
 874 {
 875         unsigned long flags = 0;
 876         struct pm8001_hba_info *pm8001_ha;
 877         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 878 
 879         pm8001_ha = pm8001_find_ha_by_dev(dev);
 880         spin_lock_irqsave(&pm8001_ha->lock, flags);
 881         if (pm8001_dev) {
 882                 u32 device_id = pm8001_dev->device_id;
 883 
 884                 PM8001_DISC_DBG(pm8001_ha,
 885                         pm8001_printk("found dev[%d:%x] is gone.\n",
 886                         pm8001_dev->device_id, pm8001_dev->dev_type));
 887                 if (pm8001_dev->running_req) {
 888                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 889                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 890                                 dev, 1, 0);
 891                         while (pm8001_dev->running_req)
 892                                 msleep(20);
 893                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 894                 }
 895                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 896                 pm8001_free_dev(pm8001_dev);
 897         } else {
 898                 PM8001_DISC_DBG(pm8001_ha,
 899                         pm8001_printk("Found dev has gone.\n"));
 900         }
 901         dev->lldd_dev = NULL;
 902         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 903 }
 904 
 905 void pm8001_dev_gone(struct domain_device *dev)
 906 {
 907         pm8001_dev_gone_notify(dev);
 908 }
 909 
 910 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 911         u8 *lun, struct pm8001_tmf_task *tmf)
 912 {
 913         struct sas_ssp_task ssp_task;
 914         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 915                 return TMF_RESP_FUNC_ESUPP;
 916 
 917         strncpy((u8 *)&ssp_task.LUN, lun, 8);
 918         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 919                 tmf);
 920 }
 921 
 922 /* retry commands by ha, by task and/or by device */
 923 void pm8001_open_reject_retry(
 924         struct pm8001_hba_info *pm8001_ha,
 925         struct sas_task *task_to_close,
 926         struct pm8001_device *device_to_close)
 927 {
 928         int i;
 929         unsigned long flags;
 930 
 931         if (pm8001_ha == NULL)
 932                 return;
 933 
 934         spin_lock_irqsave(&pm8001_ha->lock, flags);
 935 
 936         for (i = 0; i < PM8001_MAX_CCB; i++) {
 937                 struct sas_task *task;
 938                 struct task_status_struct *ts;
 939                 struct pm8001_device *pm8001_dev;
 940                 unsigned long flags1;
 941                 u32 tag;
 942                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 943 
 944                 pm8001_dev = ccb->device;
 945                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 946                         continue;
 947                 if (!device_to_close) {
 948                         uintptr_t d = (uintptr_t)pm8001_dev
 949                                         - (uintptr_t)&pm8001_ha->devices;
 950                         if (((d % sizeof(*pm8001_dev)) != 0)
 951                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 952                                 continue;
 953                 } else if (pm8001_dev != device_to_close)
 954                         continue;
 955                 tag = ccb->ccb_tag;
 956                 if (!tag || (tag == 0xFFFFFFFF))
 957                         continue;
 958                 task = ccb->task;
 959                 if (!task || !task->task_done)
 960                         continue;
 961                 if (task_to_close && (task != task_to_close))
 962                         continue;
 963                 ts = &task->task_status;
 964                 ts->resp = SAS_TASK_COMPLETE;
 965                 /* Force the midlayer to retry */
 966                 ts->stat = SAS_OPEN_REJECT;
 967                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 968                 if (pm8001_dev)
 969                         pm8001_dev->running_req--;
 970                 spin_lock_irqsave(&task->task_state_lock, flags1);
 971                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 972                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 973                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 974                 if (unlikely((task->task_state_flags
 975                                 & SAS_TASK_STATE_ABORTED))) {
 976                         spin_unlock_irqrestore(&task->task_state_lock,
 977                                 flags1);
 978                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 979                 } else {
 980                         spin_unlock_irqrestore(&task->task_state_lock,
 981                                 flags1);
 982                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 983                         mb();/* in order to force CPU ordering */
 984                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 985                         task->task_done(task);
 986                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 987                 }
 988         }
 989 
 990         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 991 }
 992 
 993 /**
 994   * Standard mandates link reset for ATA  (type 0) and hard reset for
 995   * SSP (type 1) , only for RECOVERY
 996   */
 997 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 998 {
 999         int rc = TMF_RESP_FUNC_FAILED;
1000         struct pm8001_device *pm8001_dev;
1001         struct pm8001_hba_info *pm8001_ha;
1002         struct sas_phy *phy;
1003 
1004         if (!dev || !dev->lldd_dev)
1005                 return -ENODEV;
1006 
1007         pm8001_dev = dev->lldd_dev;
1008         pm8001_ha = pm8001_find_ha_by_dev(dev);
1009         phy = sas_get_local_phy(dev);
1010 
1011         if (dev_is_sata(dev)) {
1012                 if (scsi_is_sas_phy_local(phy)) {
1013                         rc = 0;
1014                         goto out;
1015                 }
1016                 rc = sas_phy_reset(phy, 1);
1017                 if (rc) {
1018                         PM8001_EH_DBG(pm8001_ha,
1019                         pm8001_printk("phy reset failed for device %x\n"
1020                         "with rc %d\n", pm8001_dev->device_id, rc));
1021                         rc = TMF_RESP_FUNC_FAILED;
1022                         goto out;
1023                 }
1024                 msleep(2000);
1025                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1026                         dev, 1, 0);
1027                 if (rc) {
1028                         PM8001_EH_DBG(pm8001_ha,
1029                         pm8001_printk("task abort failed %x\n"
1030                         "with rc %d\n", pm8001_dev->device_id, rc));
1031                         rc = TMF_RESP_FUNC_FAILED;
1032                 }
1033         } else {
1034                 rc = sas_phy_reset(phy, 1);
1035                 msleep(2000);
1036         }
1037         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1038                 pm8001_dev->device_id, rc));
1039  out:
1040         sas_put_local_phy(phy);
1041         return rc;
1042 }
1043 
1044 /*
1045 * This function handle the IT_NEXUS_XXX event or completion
1046 * status code for SSP/SATA/SMP I/O request.
1047 */
1048 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1049 {
1050         int rc = TMF_RESP_FUNC_FAILED;
1051         struct pm8001_device *pm8001_dev;
1052         struct pm8001_hba_info *pm8001_ha;
1053         struct sas_phy *phy;
1054 
1055         if (!dev || !dev->lldd_dev)
1056                 return -1;
1057 
1058         pm8001_dev = dev->lldd_dev;
1059         pm8001_ha = pm8001_find_ha_by_dev(dev);
1060 
1061         PM8001_EH_DBG(pm8001_ha,
1062                         pm8001_printk("I_T_Nexus handler invoked !!"));
1063 
1064         phy = sas_get_local_phy(dev);
1065 
1066         if (dev_is_sata(dev)) {
1067                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1068                 if (scsi_is_sas_phy_local(phy)) {
1069                         rc = 0;
1070                         goto out;
1071                 }
1072                 /* send internal ssp/sata/smp abort command to FW */
1073                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1074                                                         dev, 1, 0);
1075                 msleep(100);
1076 
1077                 /* deregister the target device */
1078                 pm8001_dev_gone_notify(dev);
1079                 msleep(200);
1080 
1081                 /*send phy reset to hard reset target */
1082                 rc = sas_phy_reset(phy, 1);
1083                 msleep(2000);
1084                 pm8001_dev->setds_completion = &completion_setstate;
1085 
1086                 wait_for_completion(&completion_setstate);
1087         } else {
1088                 /* send internal ssp/sata/smp abort command to FW */
1089                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1090                                                         dev, 1, 0);
1091                 msleep(100);
1092 
1093                 /* deregister the target device */
1094                 pm8001_dev_gone_notify(dev);
1095                 msleep(200);
1096 
1097                 /*send phy reset to hard reset target */
1098                 rc = sas_phy_reset(phy, 1);
1099                 msleep(2000);
1100         }
1101         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1102                 pm8001_dev->device_id, rc));
1103 out:
1104         sas_put_local_phy(phy);
1105 
1106         return rc;
1107 }
1108 /* mandatory SAM-3, the task reset the specified LUN*/
1109 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1110 {
1111         int rc = TMF_RESP_FUNC_FAILED;
1112         struct pm8001_tmf_task tmf_task;
1113         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1114         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1115         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1116         if (dev_is_sata(dev)) {
1117                 struct sas_phy *phy = sas_get_local_phy(dev);
1118                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1119                         dev, 1, 0);
1120                 rc = sas_phy_reset(phy, 1);
1121                 sas_put_local_phy(phy);
1122                 pm8001_dev->setds_completion = &completion_setstate;
1123                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1124                         pm8001_dev, 0x01);
1125                 wait_for_completion(&completion_setstate);
1126         } else {
1127                 tmf_task.tmf = TMF_LU_RESET;
1128                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1129         }
1130         /* If failed, fall-through I_T_Nexus reset */
1131         PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1132                 pm8001_dev->device_id, rc));
1133         return rc;
1134 }
1135 
1136 /* optional SAM-3 */
1137 int pm8001_query_task(struct sas_task *task)
1138 {
1139         u32 tag = 0xdeadbeef;
1140         int i = 0;
1141         struct scsi_lun lun;
1142         struct pm8001_tmf_task tmf_task;
1143         int rc = TMF_RESP_FUNC_FAILED;
1144         if (unlikely(!task || !task->lldd_task || !task->dev))
1145                 return rc;
1146 
1147         if (task->task_proto & SAS_PROTOCOL_SSP) {
1148                 struct scsi_cmnd *cmnd = task->uldd_task;
1149                 struct domain_device *dev = task->dev;
1150                 struct pm8001_hba_info *pm8001_ha =
1151                         pm8001_find_ha_by_dev(dev);
1152 
1153                 int_to_scsilun(cmnd->device->lun, &lun);
1154                 rc = pm8001_find_tag(task, &tag);
1155                 if (rc == 0) {
1156                         rc = TMF_RESP_FUNC_FAILED;
1157                         return rc;
1158                 }
1159                 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1160                 for (i = 0; i < 16; i++)
1161                         printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1162                 printk(KERN_INFO "]\n");
1163                 tmf_task.tmf =  TMF_QUERY_TASK;
1164                 tmf_task.tag_of_task_to_be_managed = tag;
1165 
1166                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1167                 switch (rc) {
1168                 /* The task is still in Lun, release it then */
1169                 case TMF_RESP_FUNC_SUCC:
1170                         PM8001_EH_DBG(pm8001_ha,
1171                                 pm8001_printk("The task is still in Lun\n"));
1172                         break;
1173                 /* The task is not in Lun or failed, reset the phy */
1174                 case TMF_RESP_FUNC_FAILED:
1175                 case TMF_RESP_FUNC_COMPLETE:
1176                         PM8001_EH_DBG(pm8001_ha,
1177                         pm8001_printk("The task is not in Lun or failed,"
1178                         " reset the phy\n"));
1179                         break;
1180                 }
1181         }
1182         pm8001_printk(":rc= %d\n", rc);
1183         return rc;
1184 }
1185 
1186 /*  mandatory SAM-3, still need free task/ccb info, abort the specified task */
1187 int pm8001_abort_task(struct sas_task *task)
1188 {
1189         unsigned long flags;
1190         u32 tag;
1191         struct domain_device *dev ;
1192         struct pm8001_hba_info *pm8001_ha;
1193         struct scsi_lun lun;
1194         struct pm8001_device *pm8001_dev;
1195         struct pm8001_tmf_task tmf_task;
1196         int rc = TMF_RESP_FUNC_FAILED, ret;
1197         u32 phy_id;
1198         struct sas_task_slow slow_task;
1199         if (unlikely(!task || !task->lldd_task || !task->dev))
1200                 return TMF_RESP_FUNC_FAILED;
1201         dev = task->dev;
1202         pm8001_dev = dev->lldd_dev;
1203         pm8001_ha = pm8001_find_ha_by_dev(dev);
1204         phy_id = pm8001_dev->attached_phy;
1205         rc = pm8001_find_tag(task, &tag);
1206         if (rc == 0) {
1207                 pm8001_printk("no tag for task:%p\n", task);
1208                 return TMF_RESP_FUNC_FAILED;
1209         }
1210         spin_lock_irqsave(&task->task_state_lock, flags);
1211         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1212                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1213                 return TMF_RESP_FUNC_COMPLETE;
1214         }
1215         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1216         if (task->slow_task == NULL) {
1217                 init_completion(&slow_task.completion);
1218                 task->slow_task = &slow_task;
1219         }
1220         spin_unlock_irqrestore(&task->task_state_lock, flags);
1221         if (task->task_proto & SAS_PROTOCOL_SSP) {
1222                 struct scsi_cmnd *cmnd = task->uldd_task;
1223                 int_to_scsilun(cmnd->device->lun, &lun);
1224                 tmf_task.tmf = TMF_ABORT_TASK;
1225                 tmf_task.tag_of_task_to_be_managed = tag;
1226                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1227                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1228                         pm8001_dev->sas_device, 0, tag);
1229         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1230                 task->task_proto & SAS_PROTOCOL_STP) {
1231                 if (pm8001_ha->chip_id == chip_8006) {
1232                         DECLARE_COMPLETION_ONSTACK(completion_reset);
1233                         DECLARE_COMPLETION_ONSTACK(completion);
1234                         struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1235 
1236                         /* 1. Set Device state as Recovery */
1237                         pm8001_dev->setds_completion = &completion;
1238                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1239                                 pm8001_dev, 0x03);
1240                         wait_for_completion(&completion);
1241 
1242                         /* 2. Send Phy Control Hard Reset */
1243                         reinit_completion(&completion);
1244                         phy->reset_success = false;
1245                         phy->enable_completion = &completion;
1246                         phy->reset_completion = &completion_reset;
1247                         ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1248                                 PHY_HARD_RESET);
1249                         if (ret)
1250                                 goto out;
1251                         PM8001_MSG_DBG(pm8001_ha,
1252                                 pm8001_printk("Waiting for local phy ctl\n"));
1253                         wait_for_completion(&completion);
1254                         if (!phy->reset_success)
1255                                 goto out;
1256 
1257                         /* 3. Wait for Port Reset complete / Port reset TMO */
1258                         PM8001_MSG_DBG(pm8001_ha,
1259                                 pm8001_printk("Waiting for Port reset\n"));
1260                         wait_for_completion(&completion_reset);
1261                         if (phy->port_reset_status) {
1262                                 pm8001_dev_gone_notify(dev);
1263                                 goto out;
1264                         }
1265 
1266                         /*
1267                          * 4. SATA Abort ALL
1268                          * we wait for the task to be aborted so that the task
1269                          * is removed from the ccb. on success the caller is
1270                          * going to free the task.
1271                          */
1272                         ret = pm8001_exec_internal_task_abort(pm8001_ha,
1273                                 pm8001_dev, pm8001_dev->sas_device, 1, tag);
1274                         if (ret)
1275                                 goto out;
1276                         ret = wait_for_completion_timeout(
1277                                 &task->slow_task->completion,
1278                                 PM8001_TASK_TIMEOUT * HZ);
1279                         if (!ret)
1280                                 goto out;
1281 
1282                         /* 5. Set Device State as Operational */
1283                         reinit_completion(&completion);
1284                         pm8001_dev->setds_completion = &completion;
1285                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1286                                 pm8001_dev, 0x01);
1287                         wait_for_completion(&completion);
1288                 } else {
1289                         rc = pm8001_exec_internal_task_abort(pm8001_ha,
1290                                 pm8001_dev, pm8001_dev->sas_device, 0, tag);
1291                 }
1292                 rc = TMF_RESP_FUNC_COMPLETE;
1293         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1294                 /* SMP */
1295                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1296                         pm8001_dev->sas_device, 0, tag);
1297 
1298         }
1299 out:
1300         spin_lock_irqsave(&task->task_state_lock, flags);
1301         if (task->slow_task == &slow_task)
1302                 task->slow_task = NULL;
1303         spin_unlock_irqrestore(&task->task_state_lock, flags);
1304         if (rc != TMF_RESP_FUNC_COMPLETE)
1305                 pm8001_printk("rc= %d\n", rc);
1306         return rc;
1307 }
1308 
1309 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1310 {
1311         struct pm8001_tmf_task tmf_task;
1312 
1313         tmf_task.tmf = TMF_ABORT_TASK_SET;
1314         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1315 }
1316 
1317 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1318 {
1319         struct pm8001_tmf_task tmf_task;
1320 
1321         tmf_task.tmf = TMF_CLEAR_ACA;
1322         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1323 }
1324 
1325 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1326 {
1327         struct pm8001_tmf_task tmf_task;
1328         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1329         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1330 
1331         PM8001_EH_DBG(pm8001_ha,
1332                 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1333                 pm8001_dev->device_id));
1334         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1335         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1336 }
1337
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/scsi/pm8001/pm8001_sas.c

DEFINITIONS
