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 = dma_alloc_coherent(&pdev->dev, mem_size + align,
 120                                             &mem_dma_handle, GFP_KERNEL);
 121         if (!mem_virt_alloc) {
 122                 pr_err("pm80xx: 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 /**
 134   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 135   * find out our hba struct.
 136   * @dev: the domain device which from sas layer.
 137   */
 138 static
 139 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 140 {
 141         struct sas_ha_struct *sha = dev->port->ha;
 142         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 143         return pm8001_ha;
 144 }
 145
 146 /**
 147   * pm8001_phy_control - this function should be registered to
 148   * sas_domain_function_template to provide libsas used, note: this is just
 149   * control the HBA phy rather than other expander phy if you want control
 150   * other phy, you should use SMP command.
 151   * @sas_phy: which phy in HBA phys.
 152   * @func: the operation.
 153   * @funcdata: always NULL.
 154   */
 155 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 156         void *funcdata)
 157 {
 158         int rc = 0, phy_id = sas_phy->id;
 159         struct pm8001_hba_info *pm8001_ha = NULL;
 160         struct sas_phy_linkrates *rates;
 161         struct sas_ha_struct *sas_ha;
 162         struct pm8001_phy *phy;
 163         DECLARE_COMPLETION_ONSTACK(completion);
 164         unsigned long flags;
 165         pm8001_ha = sas_phy->ha->lldd_ha;
 166         phy = &pm8001_ha->phy[phy_id];
 167         pm8001_ha->phy[phy_id].enable_completion = &completion;
 168         switch (func) {
 169         case PHY_FUNC_SET_LINK_RATE:
 170                 rates = funcdata;
 171                 if (rates->minimum_linkrate) {
 172                         pm8001_ha->phy[phy_id].minimum_linkrate =
 173                                 rates->minimum_linkrate;
 174                 }
 175                 if (rates->maximum_linkrate) {
 176                         pm8001_ha->phy[phy_id].maximum_linkrate =
 177                                 rates->maximum_linkrate;
 178                 }
 179                 if (pm8001_ha->phy[phy_id].phy_state ==  PHY_LINK_DISABLE) {
 180                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 181                         wait_for_completion(&completion);
 182                 }
 183                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 184                                               PHY_LINK_RESET);
 185                 break;
 186         case PHY_FUNC_HARD_RESET:
 187                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 188                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 189                         wait_for_completion(&completion);
 190                 }
 191                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 192                                               PHY_HARD_RESET);
 193                 break;
 194         case PHY_FUNC_LINK_RESET:
 195                 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 196                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 197                         wait_for_completion(&completion);
 198                 }
 199                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 200                                               PHY_LINK_RESET);
 201                 break;
 202         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 203                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 204                                               PHY_LINK_RESET);
 205                 break;
 206         case PHY_FUNC_DISABLE:
 207                 if (pm8001_ha->chip_id != chip_8001) {
 208                         if (pm8001_ha->phy[phy_id].phy_state ==
 209                                 PHY_STATE_LINK_UP_SPCV) {
 210                                 sas_ha = pm8001_ha->sas;
 211                                 sas_phy_disconnected(&phy->sas_phy);
 212                                 sas_ha->notify_phy_event(&phy->sas_phy,
 213                                         PHYE_LOSS_OF_SIGNAL);
 214                                 phy->phy_attached = 0;
 215                         }
 216                 } else {
 217                         if (pm8001_ha->phy[phy_id].phy_state ==
 218                                 PHY_STATE_LINK_UP_SPC) {
 219                                 sas_ha = pm8001_ha->sas;
 220                                 sas_phy_disconnected(&phy->sas_phy);
 221                                 sas_ha->notify_phy_event(&phy->sas_phy,
 222                                         PHYE_LOSS_OF_SIGNAL);
 223                                 phy->phy_attached = 0;
 224                         }
 225                 }
 226                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 227                 break;
 228         case PHY_FUNC_GET_EVENTS:
 229                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 230                 if (pm8001_ha->chip_id == chip_8001) {
 231                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 232                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 233                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 234                                 return -EINVAL;
 235                         }
 236                 }
 237                 {
 238                         struct sas_phy *phy = sas_phy->phy;
 239                         uint32_t *qp = (uint32_t *)(((char *)
 240                                 pm8001_ha->io_mem[2].memvirtaddr)
 241                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 242
 243                         phy->invalid_dword_count = qp[0];
 244                         phy->running_disparity_error_count = qp[1];
 245                         phy->loss_of_dword_sync_count = qp[3];
 246                         phy->phy_reset_problem_count = qp[4];
 247                 }
 248                 if (pm8001_ha->chip_id == chip_8001)
 249                         pm8001_bar4_shift(pm8001_ha, 0);
 250                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 251                 return 0;
 252         default:
 253                 PM8001_DEVIO_DBG(pm8001_ha,
 254                         pm8001_printk("func 0x%x\n", func));
 255                 rc = -EOPNOTSUPP;
 256         }
 257         msleep(300);
 258         return rc;
 259 }
 260
 261 /**
 262   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 263   * command to HBA.
 264   * @shost: the scsi host data.
 265   */
 266 void pm8001_scan_start(struct Scsi_Host *shost)
 267 {
 268         int i;
 269         struct pm8001_hba_info *pm8001_ha;
 270         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 271         pm8001_ha = sha->lldd_ha;
 272         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 273         if (pm8001_ha->chip_id == chip_8001)
 274                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 275         for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
 276                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 277 }
 278
 279 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 280 {
 281         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 282
 283         /* give the phy enabling interrupt event time to come in (1s
 284         * is empirically about all it takes) */
 285         if (time < HZ)
 286                 return 0;
 287         /* Wait for discovery to finish */
 288         sas_drain_work(ha);
 289         return 1;
 290 }
 291
 292 /**
 293   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 294   * @pm8001_ha: our hba card information
 295   * @ccb: the ccb which attached to smp task
 296   */
 297 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 298         struct pm8001_ccb_info *ccb)
 299 {
 300         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 301 }
 302
 303 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 304 {
 305         struct ata_queued_cmd *qc = task->uldd_task;
 306         if (qc) {
 307                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 308                     qc->tf.command == ATA_CMD_FPDMA_READ ||
 309                     qc->tf.command == ATA_CMD_FPDMA_RECV ||
 310                     qc->tf.command == ATA_CMD_FPDMA_SEND ||
 311                     qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
 312                         *tag = qc->tag;
 313                         return 1;
 314                 }
 315         }
 316         return 0;
 317 }
 318
 319 /**
 320   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 321   * @pm8001_ha: our hba card information
 322   * @ccb: the ccb which attached to sata task
 323   */
 324 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 325         struct pm8001_ccb_info *ccb)
 326 {
 327         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 328 }
 329
 330 /**
 331   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 332   * @pm8001_ha: our hba card information
 333   * @ccb: the ccb which attached to TM
 334   * @tmf: the task management IU
 335   */
 336 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 337         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 338 {
 339         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 340 }
 341
 342 /**
 343   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 344   * @pm8001_ha: our hba card information
 345   * @ccb: the ccb which attached to ssp task
 346   */
 347 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 348         struct pm8001_ccb_info *ccb)
 349 {
 350         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 351 }
 352
 353  /* Find the local port id that's attached to this device */
 354 static int sas_find_local_port_id(struct domain_device *dev)
 355 {
 356         struct domain_device *pdev = dev->parent;
 357
 358         /* Directly attached device */
 359         if (!pdev)
 360                 return dev->port->id;
 361         while (pdev) {
 362                 struct domain_device *pdev_p = pdev->parent;
 363                 if (!pdev_p)
 364                         return pdev->port->id;
 365                 pdev = pdev->parent;
 366         }
 367         return 0;
 368 }
 369
 370 #define DEV_IS_GONE(pm8001_dev) \
 371         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 372 /**
 373   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 374   * @task: the task to be execute.
 375   * @gfp_flags: gfp_flags.
 376   * @is_tmf: if it is task management task.
 377   * @tmf: the task management IU
 378   */
 379 static int pm8001_task_exec(struct sas_task *task,
 380         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 381 {
 382         struct domain_device *dev = task->dev;
 383         struct pm8001_hba_info *pm8001_ha;
 384         struct pm8001_device *pm8001_dev;
 385         struct pm8001_port *port = NULL;
 386         struct sas_task *t = task;
 387         struct pm8001_ccb_info *ccb;
 388         u32 tag = 0xdeadbeef, rc = 0, n_elem = 0;
 389         unsigned long flags = 0;
 390         enum sas_protocol task_proto = t->task_proto;
 391
 392         if (!dev->port) {
 393                 struct task_status_struct *tsm = &t->task_status;
 394                 tsm->resp = SAS_TASK_UNDELIVERED;
 395                 tsm->stat = SAS_PHY_DOWN;
 396                 if (dev->dev_type != SAS_SATA_DEV)
 397                         t->task_done(t);
 398                 return 0;
 399         }
 400         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 401         if (pm8001_ha->controller_fatal_error) {
 402                 struct task_status_struct *ts = &t->task_status;
 403
 404                 ts->resp = SAS_TASK_UNDELIVERED;
 405                 t->task_done(t);
 406                 return 0;
 407         }
 408         PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 409         spin_lock_irqsave(&pm8001_ha->lock, flags);
 410         do {
 411                 dev = t->dev;
 412                 pm8001_dev = dev->lldd_dev;
 413                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 414                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 415                         if (sas_protocol_ata(task_proto)) {
 416                                 struct task_status_struct *ts = &t->task_status;
 417                                 ts->resp = SAS_TASK_UNDELIVERED;
 418                                 ts->stat = SAS_PHY_DOWN;
 419
 420                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 421                                 t->task_done(t);
 422                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 423                                 continue;
 424                         } else {
 425                                 struct task_status_struct *ts = &t->task_status;
 426                                 ts->resp = SAS_TASK_UNDELIVERED;
 427                                 ts->stat = SAS_PHY_DOWN;
 428                                 t->task_done(t);
 429                                 continue;
 430                         }
 431                 }
 432                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 433                 if (rc)
 434                         goto err_out;
 435                 ccb = &pm8001_ha->ccb_info[tag];
 436
 437                 if (!sas_protocol_ata(task_proto)) {
 438                         if (t->num_scatter) {
 439                                 n_elem = dma_map_sg(pm8001_ha->dev,
 440                                         t->scatter,
 441                                         t->num_scatter,
 442                                         t->data_dir);
 443                                 if (!n_elem) {
 444                                         rc = -ENOMEM;
 445                                         goto err_out_tag;
 446                                 }
 447                         }
 448                 } else {
 449                         n_elem = t->num_scatter;
 450                 }
 451
 452                 t->lldd_task = ccb;
 453                 ccb->n_elem = n_elem;
 454                 ccb->ccb_tag = tag;
 455                 ccb->task = t;
 456                 ccb->device = pm8001_dev;
 457                 switch (task_proto) {
 458                 case SAS_PROTOCOL_SMP:
 459                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 460                         break;
 461                 case SAS_PROTOCOL_SSP:
 462                         if (is_tmf)
 463                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 464                                         ccb, tmf);
 465                         else
 466                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 467                         break;
 468                 case SAS_PROTOCOL_SATA:
 469                 case SAS_PROTOCOL_STP:
 470                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 471                         break;
 472                 default:
 473                         dev_printk(KERN_ERR, pm8001_ha->dev,
 474                                 "unknown sas_task proto: 0x%x\n", task_proto);
 475                         rc = -EINVAL;
 476                         break;
 477                 }
 478
 479                 if (rc) {
 480                         PM8001_IO_DBG(pm8001_ha,
 481                                 pm8001_printk("rc is %x\n", rc));
 482                         goto err_out_tag;
 483                 }
 484                 /* TODO: select normal or high priority */
 485                 spin_lock(&t->task_state_lock);
 486                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 487                 spin_unlock(&t->task_state_lock);
 488                 pm8001_dev->running_req++;
 489         } while (0);
 490         rc = 0;
 491         goto out_done;
 492
 493 err_out_tag:
 494         pm8001_tag_free(pm8001_ha, tag);
 495 err_out:
 496         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 497         if (!sas_protocol_ata(task_proto))
 498                 if (n_elem)
 499                         dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
 500                                 t->data_dir);
 501 out_done:
 502         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 503         return rc;
 504 }
 505
 506 /**
 507   * pm8001_queue_command - register for upper layer used, all IO commands sent
 508   * to HBA are from this interface.
 509   * @task: the task to be execute.
 510   * @gfp_flags: gfp_flags
 511   */
 512 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 513 {
 514         return pm8001_task_exec(task, gfp_flags, 0, NULL);
 515 }
 516
 517 /**
 518   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 519   * @pm8001_ha: our hba card information
 520   * @ccb: the ccb which attached to ssp task
 521   * @task: the task to be free.
 522   * @ccb_idx: ccb index.
 523   */
 524 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 525         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 526 {
 527         if (!ccb->task)
 528                 return;
 529         if (!sas_protocol_ata(task->task_proto))
 530                 if (ccb->n_elem)
 531                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 532                                 task->num_scatter, task->data_dir);
 533
 534         switch (task->task_proto) {
 535         case SAS_PROTOCOL_SMP:
 536                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 537                         DMA_FROM_DEVICE);
 538                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 539                         DMA_TO_DEVICE);
 540                 break;
 541
 542         case SAS_PROTOCOL_SATA:
 543         case SAS_PROTOCOL_STP:
 544         case SAS_PROTOCOL_SSP:
 545         default:
 546                 /* do nothing */
 547                 break;
 548         }
 549         task->lldd_task = NULL;
 550         ccb->task = NULL;
 551         ccb->ccb_tag = 0xFFFFFFFF;
 552         ccb->open_retry = 0;
 553         pm8001_tag_free(pm8001_ha, ccb_idx);
 554 }
 555
 556  /**
 557   * pm8001_alloc_dev - find a empty pm8001_device
 558   * @pm8001_ha: our hba card information
 559   */
 560 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 561 {
 562         u32 dev;
 563         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 564                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 565                         pm8001_ha->devices[dev].id = dev;
 566                         return &pm8001_ha->devices[dev];
 567                 }
 568         }
 569         if (dev == PM8001_MAX_DEVICES) {
 570                 PM8001_FAIL_DBG(pm8001_ha,
 571                         pm8001_printk("max support %d devices, ignore ..\n",
 572                         PM8001_MAX_DEVICES));
 573         }
 574         return NULL;
 575 }
 576 /**
 577   * pm8001_find_dev - find a matching pm8001_device
 578   * @pm8001_ha: our hba card information
 579   * @device_id: device ID to match against
 580   */
 581 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 582                                         u32 device_id)
 583 {
 584         u32 dev;
 585         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 586                 if (pm8001_ha->devices[dev].device_id == device_id)
 587                         return &pm8001_ha->devices[dev];
 588         }
 589         if (dev == PM8001_MAX_DEVICES) {
 590                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 591                                 "DEVICE FOUND !!!\n"));
 592         }
 593         return NULL;
 594 }
 595
 596 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 597 {
 598         u32 id = pm8001_dev->id;
 599         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 600         pm8001_dev->id = id;
 601         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 602         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 603         pm8001_dev->sas_device = NULL;
 604 }
 605
 606 /**
 607   * pm8001_dev_found_notify - libsas notify a device is found.
 608   * @dev: the device structure which sas layer used.
 609   *
 610   * when libsas find a sas domain device, it should tell the LLDD that
 611   * device is found, and then LLDD register this device to HBA firmware
 612   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 613   * device ID(according to device's sas address) and returned it to LLDD. From
 614   * now on, we communicate with HBA FW with the device ID which HBA assigned
 615   * rather than sas address. it is the necessary step for our HBA but it is
 616   * the optional for other HBA driver.
 617   */
 618 static int pm8001_dev_found_notify(struct domain_device *dev)
 619 {
 620         unsigned long flags = 0;
 621         int res = 0;
 622         struct pm8001_hba_info *pm8001_ha = NULL;
 623         struct domain_device *parent_dev = dev->parent;
 624         struct pm8001_device *pm8001_device;
 625         DECLARE_COMPLETION_ONSTACK(completion);
 626         u32 flag = 0;
 627         pm8001_ha = pm8001_find_ha_by_dev(dev);
 628         spin_lock_irqsave(&pm8001_ha->lock, flags);
 629
 630         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 631         if (!pm8001_device) {
 632                 res = -1;
 633                 goto found_out;
 634         }
 635         pm8001_device->sas_device = dev;
 636         dev->lldd_dev = pm8001_device;
 637         pm8001_device->dev_type = dev->dev_type;
 638         pm8001_device->dcompletion = &completion;
 639         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 640                 int phy_id;
 641                 struct ex_phy *phy;
 642                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 643                 phy_id++) {
 644                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 645                         if (SAS_ADDR(phy->attached_sas_addr)
 646                                 == SAS_ADDR(dev->sas_addr)) {
 647                                 pm8001_device->attached_phy = phy_id;
 648                                 break;
 649                         }
 650                 }
 651                 if (phy_id == parent_dev->ex_dev.num_phys) {
 652                         PM8001_FAIL_DBG(pm8001_ha,
 653                         pm8001_printk("Error: no attached dev:%016llx"
 654                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 655                                 SAS_ADDR(parent_dev->sas_addr)));
 656                         res = -1;
 657                 }
 658         } else {
 659                 if (dev->dev_type == SAS_SATA_DEV) {
 660                         pm8001_device->attached_phy =
 661                                 dev->rphy->identify.phy_identifier;
 662                         flag = 1; /* directly sata */
 663                 }
 664         } /*register this device to HBA*/
 665         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 666         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 667         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 668         wait_for_completion(&completion);
 669         if (dev->dev_type == SAS_END_DEVICE)
 670                 msleep(50);
 671         pm8001_ha->flags = PM8001F_RUN_TIME;
 672         return 0;
 673 found_out:
 674         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 675         return res;
 676 }
 677
 678 int pm8001_dev_found(struct domain_device *dev)
 679 {
 680         return pm8001_dev_found_notify(dev);
 681 }
 682
 683 void pm8001_task_done(struct sas_task *task)
 684 {
 685         if (!del_timer(&task->slow_task->timer))
 686                 return;
 687         complete(&task->slow_task->completion);
 688 }
 689
 690 static void pm8001_tmf_timedout(struct timer_list *t)
 691 {
 692         struct sas_task_slow *slow = from_timer(slow, t, timer);
 693         struct sas_task *task = slow->task;
 694
 695         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 696         complete(&task->slow_task->completion);
 697 }
 698
 699 #define PM8001_TASK_TIMEOUT 20
 700 /**
 701   * pm8001_exec_internal_tmf_task - execute some task management commands.
 702   * @dev: the wanted device.
 703   * @tmf: which task management wanted to be take.
 704   * @para_len: para_len.
 705   * @parameter: ssp task parameter.
 706   *
 707   * when errors or exception happened, we may want to do something, for example
 708   * abort the issued task which result in this execption, it is done by calling
 709   * this function, note it is also with the task execute interface.
 710   */
 711 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 712         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 713 {
 714         int res, retry;
 715         struct sas_task *task = NULL;
 716         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 717         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 718         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 719
 720         for (retry = 0; retry < 3; retry++) {
 721                 task = sas_alloc_slow_task(GFP_KERNEL);
 722                 if (!task)
 723                         return -ENOMEM;
 724
 725                 task->dev = dev;
 726                 task->task_proto = dev->tproto;
 727                 memcpy(&task->ssp_task, parameter, para_len);
 728                 task->task_done = pm8001_task_done;
 729                 task->slow_task->timer.function = pm8001_tmf_timedout;
 730                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 731                 add_timer(&task->slow_task->timer);
 732
 733                 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 734
 735                 if (res) {
 736                         del_timer(&task->slow_task->timer);
 737                         PM8001_FAIL_DBG(pm8001_ha,
 738                                 pm8001_printk("Executing internal task "
 739                                 "failed\n"));
 740                         goto ex_err;
 741                 }
 742                 wait_for_completion(&task->slow_task->completion);
 743                 if (pm8001_ha->chip_id != chip_8001) {
 744                         pm8001_dev->setds_completion = &completion_setstate;
 745                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 746                                 pm8001_dev, 0x01);
 747                         wait_for_completion(&completion_setstate);
 748                 }
 749                 res = -TMF_RESP_FUNC_FAILED;
 750                 /* Even TMF timed out, return direct. */
 751                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 752                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 753                                 PM8001_FAIL_DBG(pm8001_ha,
 754                                         pm8001_printk("TMF task[%x]timeout.\n",
 755                                         tmf->tmf));
 756                                 goto ex_err;
 757                         }
 758                 }
 759
 760                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 761                         task->task_status.stat == SAM_STAT_GOOD) {
 762                         res = TMF_RESP_FUNC_COMPLETE;
 763                         break;
 764                 }
 765
 766                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 767                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 768                         /* no error, but return the number of bytes of
 769                         * underrun */
 770                         res = task->task_status.residual;
 771                         break;
 772                 }
 773
 774                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 775                         task->task_status.stat == SAS_DATA_OVERRUN) {
 776                         PM8001_FAIL_DBG(pm8001_ha,
 777                                 pm8001_printk("Blocked task error.\n"));
 778                         res = -EMSGSIZE;
 779                         break;
 780                 } else {
 781                         PM8001_EH_DBG(pm8001_ha,
 782                                 pm8001_printk(" Task to dev %016llx response:"
 783                                 "0x%x status 0x%x\n",
 784                                 SAS_ADDR(dev->sas_addr),
 785                                 task->task_status.resp,
 786                                 task->task_status.stat));
 787                         sas_free_task(task);
 788                         task = NULL;
 789                 }
 790         }
 791 ex_err:
 792         BUG_ON(retry == 3 && task != NULL);
 793         sas_free_task(task);
 794         return res;
 795 }
 796
 797 static int
 798 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 799         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 800         u32 task_tag)
 801 {
 802         int res, retry;
 803         u32 ccb_tag;
 804         struct pm8001_ccb_info *ccb;
 805         struct sas_task *task = NULL;
 806
 807         for (retry = 0; retry < 3; retry++) {
 808                 task = sas_alloc_slow_task(GFP_KERNEL);
 809                 if (!task)
 810                         return -ENOMEM;
 811
 812                 task->dev = dev;
 813                 task->task_proto = dev->tproto;
 814                 task->task_done = pm8001_task_done;
 815                 task->slow_task->timer.function = pm8001_tmf_timedout;
 816                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 817                 add_timer(&task->slow_task->timer);
 818
 819                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 820                 if (res)
 821                         goto ex_err;
 822                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 823                 ccb->device = pm8001_dev;
 824                 ccb->ccb_tag = ccb_tag;
 825                 ccb->task = task;
 826                 ccb->n_elem = 0;
 827
 828                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 829                         pm8001_dev, flag, task_tag, ccb_tag);
 830
 831                 if (res) {
 832                         del_timer(&task->slow_task->timer);
 833                         PM8001_FAIL_DBG(pm8001_ha,
 834                                 pm8001_printk("Executing internal task "
 835                                 "failed\n"));
 836                         goto ex_err;
 837                 }
 838                 wait_for_completion(&task->slow_task->completion);
 839                 res = TMF_RESP_FUNC_FAILED;
 840                 /* Even TMF timed out, return direct. */
 841                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 842                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 843                                 PM8001_FAIL_DBG(pm8001_ha,
 844                                         pm8001_printk("TMF task timeout.\n"));
 845                                 goto ex_err;
 846                         }
 847                 }
 848
 849                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 850                         task->task_status.stat == SAM_STAT_GOOD) {
 851                         res = TMF_RESP_FUNC_COMPLETE;
 852                         break;
 853
 854                 } else {
 855                         PM8001_EH_DBG(pm8001_ha,
 856                                 pm8001_printk(" Task to dev %016llx response: "
 857                                         "0x%x status 0x%x\n",
 858                                 SAS_ADDR(dev->sas_addr),
 859                                 task->task_status.resp,
 860                                 task->task_status.stat));
 861                         sas_free_task(task);
 862                         task = NULL;
 863                 }
 864         }
 865 ex_err:
 866         BUG_ON(retry == 3 && task != NULL);
 867         sas_free_task(task);
 868         return res;
 869 }
 870
 871 /**
 872   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 873   * @dev: the device structure which sas layer used.
 874   */
 875 static void pm8001_dev_gone_notify(struct domain_device *dev)
 876 {
 877         unsigned long flags = 0;
 878         struct pm8001_hba_info *pm8001_ha;
 879         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 880
 881         pm8001_ha = pm8001_find_ha_by_dev(dev);
 882         spin_lock_irqsave(&pm8001_ha->lock, flags);
 883         if (pm8001_dev) {
 884                 u32 device_id = pm8001_dev->device_id;
 885
 886                 PM8001_DISC_DBG(pm8001_ha,
 887                         pm8001_printk("found dev[%d:%x] is gone.\n",
 888                         pm8001_dev->device_id, pm8001_dev->dev_type));
 889                 if (pm8001_dev->running_req) {
 890                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 891                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 892                                 dev, 1, 0);
 893                         while (pm8001_dev->running_req)
 894                                 msleep(20);
 895                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 896                 }
 897                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 898                 pm8001_free_dev(pm8001_dev);
 899         } else {
 900                 PM8001_DISC_DBG(pm8001_ha,
 901                         pm8001_printk("Found dev has gone.\n"));
 902         }
 903         dev->lldd_dev = NULL;
 904         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 905 }
 906
 907 void pm8001_dev_gone(struct domain_device *dev)
 908 {
 909         pm8001_dev_gone_notify(dev);
 910 }
 911
 912 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 913         u8 *lun, struct pm8001_tmf_task *tmf)
 914 {
 915         struct sas_ssp_task ssp_task;
 916         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 917                 return TMF_RESP_FUNC_ESUPP;
 918
 919         strncpy((u8 *)&ssp_task.LUN, lun, 8);
 920         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 921                 tmf);
 922 }
 923
 924 /* retry commands by ha, by task and/or by device */
 925 void pm8001_open_reject_retry(
 926         struct pm8001_hba_info *pm8001_ha,
 927         struct sas_task *task_to_close,
 928         struct pm8001_device *device_to_close)
 929 {
 930         int i;
 931         unsigned long flags;
 932
 933         if (pm8001_ha == NULL)
 934                 return;
 935
 936         spin_lock_irqsave(&pm8001_ha->lock, flags);
 937
 938         for (i = 0; i < PM8001_MAX_CCB; i++) {
 939                 struct sas_task *task;
 940                 struct task_status_struct *ts;
 941                 struct pm8001_device *pm8001_dev;
 942                 unsigned long flags1;
 943                 u32 tag;
 944                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 945
 946                 pm8001_dev = ccb->device;
 947                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 948                         continue;
 949                 if (!device_to_close) {
 950                         uintptr_t d = (uintptr_t)pm8001_dev
 951                                         - (uintptr_t)&pm8001_ha->devices;
 952                         if (((d % sizeof(*pm8001_dev)) != 0)
 953                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 954                                 continue;
 955                 } else if (pm8001_dev != device_to_close)
 956                         continue;
 957                 tag = ccb->ccb_tag;
 958                 if (!tag || (tag == 0xFFFFFFFF))
 959                         continue;
 960                 task = ccb->task;
 961                 if (!task || !task->task_done)
 962                         continue;
 963                 if (task_to_close && (task != task_to_close))
 964                         continue;
 965                 ts = &task->task_status;
 966                 ts->resp = SAS_TASK_COMPLETE;
 967                 /* Force the midlayer to retry */
 968                 ts->stat = SAS_OPEN_REJECT;
 969                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 970                 if (pm8001_dev)
 971                         pm8001_dev->running_req--;
 972                 spin_lock_irqsave(&task->task_state_lock, flags1);
 973                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 974                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 975                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 976                 if (unlikely((task->task_state_flags
 977                                 & SAS_TASK_STATE_ABORTED))) {
 978                         spin_unlock_irqrestore(&task->task_state_lock,
 979                                 flags1);
 980                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 981                 } else {
 982                         spin_unlock_irqrestore(&task->task_state_lock,
 983                                 flags1);
 984                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 985                         mb();/* in order to force CPU ordering */
 986                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 987                         task->task_done(task);
 988                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 989                 }
 990         }
 991
 992         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 993 }
 994
 995 /**
 996   * Standard mandates link reset for ATA  (type 0) and hard reset for
 997   * SSP (type 1) , only for RECOVERY
 998   * @dev: the device structure for the device to reset.
 999   */
1000 int pm8001_I_T_nexus_reset(struct domain_device *dev)
1001 {
1002         int rc = TMF_RESP_FUNC_FAILED;
1003         struct pm8001_device *pm8001_dev;
1004         struct pm8001_hba_info *pm8001_ha;
1005         struct sas_phy *phy;
1006
1007         if (!dev || !dev->lldd_dev)
1008                 return -ENODEV;
1009
1010         pm8001_dev = dev->lldd_dev;
1011         pm8001_ha = pm8001_find_ha_by_dev(dev);
1012         phy = sas_get_local_phy(dev);
1013
1014         if (dev_is_sata(dev)) {
1015                 if (scsi_is_sas_phy_local(phy)) {
1016                         rc = 0;
1017                         goto out;
1018                 }
1019                 rc = sas_phy_reset(phy, 1);
1020                 if (rc) {
1021                         PM8001_EH_DBG(pm8001_ha,
1022                         pm8001_printk("phy reset failed for device %x\n"
1023                         "with rc %d\n", pm8001_dev->device_id, rc));
1024                         rc = TMF_RESP_FUNC_FAILED;
1025                         goto out;
1026                 }
1027                 msleep(2000);
1028                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1029                         dev, 1, 0);
1030                 if (rc) {
1031                         PM8001_EH_DBG(pm8001_ha,
1032                         pm8001_printk("task abort failed %x\n"
1033                         "with rc %d\n", pm8001_dev->device_id, rc));
1034                         rc = TMF_RESP_FUNC_FAILED;
1035                 }
1036         } else {
1037                 rc = sas_phy_reset(phy, 1);
1038                 msleep(2000);
1039         }
1040         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1041                 pm8001_dev->device_id, rc));
1042  out:
1043         sas_put_local_phy(phy);
1044         return rc;
1045 }
1046
1047 /*
1048 * This function handle the IT_NEXUS_XXX event or completion
1049 * status code for SSP/SATA/SMP I/O request.
1050 */
1051 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1052 {
1053         int rc = TMF_RESP_FUNC_FAILED;
1054         struct pm8001_device *pm8001_dev;
1055         struct pm8001_hba_info *pm8001_ha;
1056         struct sas_phy *phy;
1057
1058         if (!dev || !dev->lldd_dev)
1059                 return -1;
1060
1061         pm8001_dev = dev->lldd_dev;
1062         pm8001_ha = pm8001_find_ha_by_dev(dev);
1063
1064         PM8001_EH_DBG(pm8001_ha,
1065                         pm8001_printk("I_T_Nexus handler invoked !!"));
1066
1067         phy = sas_get_local_phy(dev);
1068
1069         if (dev_is_sata(dev)) {
1070                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1071                 if (scsi_is_sas_phy_local(phy)) {
1072                         rc = 0;
1073                         goto out;
1074                 }
1075                 /* send internal ssp/sata/smp abort command to FW */
1076                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1077                                                         dev, 1, 0);
1078                 msleep(100);
1079
1080                 /* deregister the target device */
1081                 pm8001_dev_gone_notify(dev);
1082                 msleep(200);
1083
1084                 /*send phy reset to hard reset target */
1085                 rc = sas_phy_reset(phy, 1);
1086                 msleep(2000);
1087                 pm8001_dev->setds_completion = &completion_setstate;
1088
1089                 wait_for_completion(&completion_setstate);
1090         } else {
1091                 /* send internal ssp/sata/smp abort command to FW */
1092                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1093                                                         dev, 1, 0);
1094                 msleep(100);
1095
1096                 /* deregister the target device */
1097                 pm8001_dev_gone_notify(dev);
1098                 msleep(200);
1099
1100                 /*send phy reset to hard reset target */
1101                 rc = sas_phy_reset(phy, 1);
1102                 msleep(2000);
1103         }
1104         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1105                 pm8001_dev->device_id, rc));
1106 out:
1107         sas_put_local_phy(phy);
1108
1109         return rc;
1110 }
1111 /* mandatory SAM-3, the task reset the specified LUN*/
1112 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1113 {
1114         int rc = TMF_RESP_FUNC_FAILED;
1115         struct pm8001_tmf_task tmf_task;
1116         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1117         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1118         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1119         if (dev_is_sata(dev)) {
1120                 struct sas_phy *phy = sas_get_local_phy(dev);
1121                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1122                         dev, 1, 0);
1123                 rc = sas_phy_reset(phy, 1);
1124                 sas_put_local_phy(phy);
1125                 pm8001_dev->setds_completion = &completion_setstate;
1126                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1127                         pm8001_dev, 0x01);
1128                 wait_for_completion(&completion_setstate);
1129         } else {
1130                 tmf_task.tmf = TMF_LU_RESET;
1131                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1132         }
1133         /* If failed, fall-through I_T_Nexus reset */
1134         PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1135                 pm8001_dev->device_id, rc));
1136         return rc;
1137 }
1138
1139 /* optional SAM-3 */
1140 int pm8001_query_task(struct sas_task *task)
1141 {
1142         u32 tag = 0xdeadbeef;
1143         int i = 0;
1144         struct scsi_lun lun;
1145         struct pm8001_tmf_task tmf_task;
1146         int rc = TMF_RESP_FUNC_FAILED;
1147         if (unlikely(!task || !task->lldd_task || !task->dev))
1148                 return rc;
1149
1150         if (task->task_proto & SAS_PROTOCOL_SSP) {
1151                 struct scsi_cmnd *cmnd = task->uldd_task;
1152                 struct domain_device *dev = task->dev;
1153                 struct pm8001_hba_info *pm8001_ha =
1154                         pm8001_find_ha_by_dev(dev);
1155
1156                 int_to_scsilun(cmnd->device->lun, &lun);
1157                 rc = pm8001_find_tag(task, &tag);
1158                 if (rc == 0) {
1159                         rc = TMF_RESP_FUNC_FAILED;
1160                         return rc;
1161                 }
1162                 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1163                 for (i = 0; i < 16; i++)
1164                         printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1165                 printk(KERN_INFO "]\n");
1166                 tmf_task.tmf =  TMF_QUERY_TASK;
1167                 tmf_task.tag_of_task_to_be_managed = tag;
1168
1169                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1170                 switch (rc) {
1171                 /* The task is still in Lun, release it then */
1172                 case TMF_RESP_FUNC_SUCC:
1173                         PM8001_EH_DBG(pm8001_ha,
1174                                 pm8001_printk("The task is still in Lun\n"));
1175                         break;
1176                 /* The task is not in Lun or failed, reset the phy */
1177                 case TMF_RESP_FUNC_FAILED:
1178                 case TMF_RESP_FUNC_COMPLETE:
1179                         PM8001_EH_DBG(pm8001_ha,
1180                         pm8001_printk("The task is not in Lun or failed,"
1181                         " reset the phy\n"));
1182                         break;
1183                 }
1184         }
1185         pr_err("pm80xx: rc= %d\n", rc);
1186         return rc;
1187 }
1188
1189 /*  mandatory SAM-3, still need free task/ccb info, abort the specified task */
1190 int pm8001_abort_task(struct sas_task *task)
1191 {
1192         unsigned long flags;
1193         u32 tag;
1194         struct domain_device *dev ;
1195         struct pm8001_hba_info *pm8001_ha;
1196         struct scsi_lun lun;
1197         struct pm8001_device *pm8001_dev;
1198         struct pm8001_tmf_task tmf_task;
1199         int rc = TMF_RESP_FUNC_FAILED, ret;
1200         u32 phy_id;
1201         struct sas_task_slow slow_task;
1202         if (unlikely(!task || !task->lldd_task || !task->dev))
1203                 return TMF_RESP_FUNC_FAILED;
1204         dev = task->dev;
1205         pm8001_dev = dev->lldd_dev;
1206         pm8001_ha = pm8001_find_ha_by_dev(dev);
1207         phy_id = pm8001_dev->attached_phy;
1208         ret = pm8001_find_tag(task, &tag);
1209         if (ret == 0) {
1210                 pm8001_printk("no tag for task:%p\n", task);
1211                 return TMF_RESP_FUNC_FAILED;
1212         }
1213         spin_lock_irqsave(&task->task_state_lock, flags);
1214         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1215                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1216                 return TMF_RESP_FUNC_COMPLETE;
1217         }
1218         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1219         if (task->slow_task == NULL) {
1220                 init_completion(&slow_task.completion);
1221                 task->slow_task = &slow_task;
1222         }
1223         spin_unlock_irqrestore(&task->task_state_lock, flags);
1224         if (task->task_proto & SAS_PROTOCOL_SSP) {
1225                 struct scsi_cmnd *cmnd = task->uldd_task;
1226                 int_to_scsilun(cmnd->device->lun, &lun);
1227                 tmf_task.tmf = TMF_ABORT_TASK;
1228                 tmf_task.tag_of_task_to_be_managed = tag;
1229                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1230                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1231                         pm8001_dev->sas_device, 0, tag);
1232         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1233                 task->task_proto & SAS_PROTOCOL_STP) {
1234                 if (pm8001_ha->chip_id == chip_8006) {
1235                         DECLARE_COMPLETION_ONSTACK(completion_reset);
1236                         DECLARE_COMPLETION_ONSTACK(completion);
1237                         struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1238
1239                         /* 1. Set Device state as Recovery */
1240                         pm8001_dev->setds_completion = &completion;
1241                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1242                                 pm8001_dev, 0x03);
1243                         wait_for_completion(&completion);
1244
1245                         /* 2. Send Phy Control Hard Reset */
1246                         reinit_completion(&completion);
1247                         phy->port_reset_status = PORT_RESET_TMO;
1248                         phy->reset_success = false;
1249                         phy->enable_completion = &completion;
1250                         phy->reset_completion = &completion_reset;
1251                         ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1252                                 PHY_HARD_RESET);
1253                         if (ret) {
1254                                 phy->enable_completion = NULL;
1255                                 phy->reset_completion = NULL;
1256                                 goto out;
1257                         }
1258
1259                         /* In the case of the reset timeout/fail we still
1260                          * abort the command at the firmware. The assumption
1261                          * here is that the drive is off doing something so
1262                          * that it's not processing requests, and we want to
1263                          * avoid getting a completion for this and either
1264                          * leaking the task in libsas or losing the race and
1265                          * getting a double free.
1266                          */
1267                         PM8001_MSG_DBG(pm8001_ha,
1268                                 pm8001_printk("Waiting for local phy ctl\n"));
1269                         ret = wait_for_completion_timeout(&completion,
1270                                         PM8001_TASK_TIMEOUT * HZ);
1271                         if (!ret || !phy->reset_success) {
1272                                 phy->enable_completion = NULL;
1273                                 phy->reset_completion = NULL;
1274                         } else {
1275                                 /* 3. Wait for Port Reset complete or
1276                                  * Port reset TMO
1277                                  */
1278                                 PM8001_MSG_DBG(pm8001_ha,
1279                                 pm8001_printk("Waiting for Port reset\n"));
1280                                 ret = wait_for_completion_timeout(
1281                                         &completion_reset,
1282                                         PM8001_TASK_TIMEOUT * HZ);
1283                                 if (!ret)
1284                                         phy->reset_completion = NULL;
1285                                 WARN_ON(phy->port_reset_status ==
1286                                                 PORT_RESET_TMO);
1287                                 if (phy->port_reset_status == PORT_RESET_TMO) {
1288                                         pm8001_dev_gone_notify(dev);
1289                                         goto out;
1290                                 }
1291                         }
1292
1293                         /*
1294                          * 4. SATA Abort ALL
1295                          * we wait for the task to be aborted so that the task
1296                          * is removed from the ccb. on success the caller is
1297                          * going to free the task.
1298                          */
1299                         ret = pm8001_exec_internal_task_abort(pm8001_ha,
1300                                 pm8001_dev, pm8001_dev->sas_device, 1, tag);
1301                         if (ret)
1302                                 goto out;
1303                         ret = wait_for_completion_timeout(
1304                                 &task->slow_task->completion,
1305                                 PM8001_TASK_TIMEOUT * HZ);
1306                         if (!ret)
1307                                 goto out;
1308
1309                         /* 5. Set Device State as Operational */
1310                         reinit_completion(&completion);
1311                         pm8001_dev->setds_completion = &completion;
1312                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1313                                 pm8001_dev, 0x01);
1314                         wait_for_completion(&completion);
1315                 } else {
1316                         rc = pm8001_exec_internal_task_abort(pm8001_ha,
1317                                 pm8001_dev, pm8001_dev->sas_device, 0, tag);
1318                 }
1319                 rc = TMF_RESP_FUNC_COMPLETE;
1320         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1321                 /* SMP */
1322                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1323                         pm8001_dev->sas_device, 0, tag);
1324
1325         }
1326 out:
1327         spin_lock_irqsave(&task->task_state_lock, flags);
1328         if (task->slow_task == &slow_task)
1329                 task->slow_task = NULL;
1330         spin_unlock_irqrestore(&task->task_state_lock, flags);
1331         if (rc != TMF_RESP_FUNC_COMPLETE)
1332                 pm8001_printk("rc= %d\n", rc);
1333         return rc;
1334 }
1335
1336 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1337 {
1338         struct pm8001_tmf_task tmf_task;
1339
1340         tmf_task.tmf = TMF_ABORT_TASK_SET;
1341         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1342 }
1343
1344 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1345 {
1346         struct pm8001_tmf_task tmf_task;
1347
1348         tmf_task.tmf = TMF_CLEAR_ACA;
1349         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1350 }
1351
1352 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1353 {
1354         struct pm8001_tmf_task tmf_task;
1355         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1356         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1357
1358         PM8001_EH_DBG(pm8001_ha,
1359                 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1360                 pm8001_dev->device_id));
1361         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1362         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1363 }
1364