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                         atomic_inc(&pm8001_dev->running_req);
 460                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 461                         break;
 462                 case SAS_PROTOCOL_SSP:
 463                         atomic_inc(&pm8001_dev->running_req);
 464                         if (is_tmf)
 465                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 466                                         ccb, tmf);
 467                         else
 468                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 469                         break;
 470                 case SAS_PROTOCOL_SATA:
 471                 case SAS_PROTOCOL_STP:
 472                         atomic_inc(&pm8001_dev->running_req);
 473                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 474                         break;
 475                 default:
 476                         dev_printk(KERN_ERR, pm8001_ha->dev,
 477                                 "unknown sas_task proto: 0x%x\n", task_proto);
 478                         rc = -EINVAL;
 479                         break;
 480                 }
 481
 482                 if (rc) {
 483                         PM8001_IO_DBG(pm8001_ha,
 484                                 pm8001_printk("rc is %x\n", rc));
 485                         atomic_dec(&pm8001_dev->running_req);
 486                         goto err_out_tag;
 487                 }
 488                 /* TODO: select normal or high priority */
 489                 spin_lock(&t->task_state_lock);
 490                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 491                 spin_unlock(&t->task_state_lock);
 492         } while (0);
 493         rc = 0;
 494         goto out_done;
 495
 496 err_out_tag:
 497         pm8001_tag_free(pm8001_ha, tag);
 498 err_out:
 499         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 500         if (!sas_protocol_ata(task_proto))
 501                 if (n_elem)
 502                         dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
 503                                 t->data_dir);
 504 out_done:
 505         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 506         return rc;
 507 }
 508
 509 /**
 510   * pm8001_queue_command - register for upper layer used, all IO commands sent
 511   * to HBA are from this interface.
 512   * @task: the task to be execute.
 513   * @gfp_flags: gfp_flags
 514   */
 515 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 516 {
 517         return pm8001_task_exec(task, gfp_flags, 0, NULL);
 518 }
 519
 520 /**
 521   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 522   * @pm8001_ha: our hba card information
 523   * @ccb: the ccb which attached to ssp task
 524   * @task: the task to be free.
 525   * @ccb_idx: ccb index.
 526   */
 527 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 528         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 529 {
 530         if (!ccb->task)
 531                 return;
 532         if (!sas_protocol_ata(task->task_proto))
 533                 if (ccb->n_elem)
 534                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 535                                 task->num_scatter, task->data_dir);
 536
 537         switch (task->task_proto) {
 538         case SAS_PROTOCOL_SMP:
 539                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 540                         DMA_FROM_DEVICE);
 541                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 542                         DMA_TO_DEVICE);
 543                 break;
 544
 545         case SAS_PROTOCOL_SATA:
 546         case SAS_PROTOCOL_STP:
 547         case SAS_PROTOCOL_SSP:
 548         default:
 549                 /* do nothing */
 550                 break;
 551         }
 552         task->lldd_task = NULL;
 553         ccb->task = NULL;
 554         ccb->ccb_tag = 0xFFFFFFFF;
 555         ccb->open_retry = 0;
 556         pm8001_tag_free(pm8001_ha, ccb_idx);
 557 }
 558
 559  /**
 560   * pm8001_alloc_dev - find a empty pm8001_device
 561   * @pm8001_ha: our hba card information
 562   */
 563 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 564 {
 565         u32 dev;
 566         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 567                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 568                         pm8001_ha->devices[dev].id = dev;
 569                         return &pm8001_ha->devices[dev];
 570                 }
 571         }
 572         if (dev == PM8001_MAX_DEVICES) {
 573                 PM8001_FAIL_DBG(pm8001_ha,
 574                         pm8001_printk("max support %d devices, ignore ..\n",
 575                         PM8001_MAX_DEVICES));
 576         }
 577         return NULL;
 578 }
 579 /**
 580   * pm8001_find_dev - find a matching pm8001_device
 581   * @pm8001_ha: our hba card information
 582   * @device_id: device ID to match against
 583   */
 584 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 585                                         u32 device_id)
 586 {
 587         u32 dev;
 588         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 589                 if (pm8001_ha->devices[dev].device_id == device_id)
 590                         return &pm8001_ha->devices[dev];
 591         }
 592         if (dev == PM8001_MAX_DEVICES) {
 593                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 594                                 "DEVICE FOUND !!!\n"));
 595         }
 596         return NULL;
 597 }
 598
 599 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 600 {
 601         u32 id = pm8001_dev->id;
 602         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 603         pm8001_dev->id = id;
 604         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 605         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 606         pm8001_dev->sas_device = NULL;
 607 }
 608
 609 /**
 610   * pm8001_dev_found_notify - libsas notify a device is found.
 611   * @dev: the device structure which sas layer used.
 612   *
 613   * when libsas find a sas domain device, it should tell the LLDD that
 614   * device is found, and then LLDD register this device to HBA firmware
 615   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 616   * device ID(according to device's sas address) and returned it to LLDD. From
 617   * now on, we communicate with HBA FW with the device ID which HBA assigned
 618   * rather than sas address. it is the necessary step for our HBA but it is
 619   * the optional for other HBA driver.
 620   */
 621 static int pm8001_dev_found_notify(struct domain_device *dev)
 622 {
 623         unsigned long flags = 0;
 624         int res = 0;
 625         struct pm8001_hba_info *pm8001_ha = NULL;
 626         struct domain_device *parent_dev = dev->parent;
 627         struct pm8001_device *pm8001_device;
 628         DECLARE_COMPLETION_ONSTACK(completion);
 629         u32 flag = 0;
 630         pm8001_ha = pm8001_find_ha_by_dev(dev);
 631         spin_lock_irqsave(&pm8001_ha->lock, flags);
 632
 633         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 634         if (!pm8001_device) {
 635                 res = -1;
 636                 goto found_out;
 637         }
 638         pm8001_device->sas_device = dev;
 639         dev->lldd_dev = pm8001_device;
 640         pm8001_device->dev_type = dev->dev_type;
 641         pm8001_device->dcompletion = &completion;
 642         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 643                 int phy_id;
 644                 struct ex_phy *phy;
 645                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 646                 phy_id++) {
 647                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 648                         if (SAS_ADDR(phy->attached_sas_addr)
 649                                 == SAS_ADDR(dev->sas_addr)) {
 650                                 pm8001_device->attached_phy = phy_id;
 651                                 break;
 652                         }
 653                 }
 654                 if (phy_id == parent_dev->ex_dev.num_phys) {
 655                         PM8001_FAIL_DBG(pm8001_ha,
 656                         pm8001_printk("Error: no attached dev:%016llx"
 657                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 658                                 SAS_ADDR(parent_dev->sas_addr)));
 659                         res = -1;
 660                 }
 661         } else {
 662                 if (dev->dev_type == SAS_SATA_DEV) {
 663                         pm8001_device->attached_phy =
 664                                 dev->rphy->identify.phy_identifier;
 665                         flag = 1; /* directly sata */
 666                 }
 667         } /*register this device to HBA*/
 668         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 669         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 670         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 671         wait_for_completion(&completion);
 672         if (dev->dev_type == SAS_END_DEVICE)
 673                 msleep(50);
 674         pm8001_ha->flags = PM8001F_RUN_TIME;
 675         return 0;
 676 found_out:
 677         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 678         return res;
 679 }
 680
 681 int pm8001_dev_found(struct domain_device *dev)
 682 {
 683         return pm8001_dev_found_notify(dev);
 684 }
 685
 686 void pm8001_task_done(struct sas_task *task)
 687 {
 688         if (!del_timer(&task->slow_task->timer))
 689                 return;
 690         complete(&task->slow_task->completion);
 691 }
 692
 693 static void pm8001_tmf_timedout(struct timer_list *t)
 694 {
 695         struct sas_task_slow *slow = from_timer(slow, t, timer);
 696         struct sas_task *task = slow->task;
 697
 698         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 699         complete(&task->slow_task->completion);
 700 }
 701
 702 #define PM8001_TASK_TIMEOUT 20
 703 /**
 704   * pm8001_exec_internal_tmf_task - execute some task management commands.
 705   * @dev: the wanted device.
 706   * @tmf: which task management wanted to be take.
 707   * @para_len: para_len.
 708   * @parameter: ssp task parameter.
 709   *
 710   * when errors or exception happened, we may want to do something, for example
 711   * abort the issued task which result in this execption, it is done by calling
 712   * this function, note it is also with the task execute interface.
 713   */
 714 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 715         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 716 {
 717         int res, retry;
 718         struct sas_task *task = NULL;
 719         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 720         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 721         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 722
 723         for (retry = 0; retry < 3; retry++) {
 724                 task = sas_alloc_slow_task(GFP_KERNEL);
 725                 if (!task)
 726                         return -ENOMEM;
 727
 728                 task->dev = dev;
 729                 task->task_proto = dev->tproto;
 730                 memcpy(&task->ssp_task, parameter, para_len);
 731                 task->task_done = pm8001_task_done;
 732                 task->slow_task->timer.function = pm8001_tmf_timedout;
 733                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 734                 add_timer(&task->slow_task->timer);
 735
 736                 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 737
 738                 if (res) {
 739                         del_timer(&task->slow_task->timer);
 740                         PM8001_FAIL_DBG(pm8001_ha,
 741                                 pm8001_printk("Executing internal task "
 742                                 "failed\n"));
 743                         goto ex_err;
 744                 }
 745                 wait_for_completion(&task->slow_task->completion);
 746                 if (pm8001_ha->chip_id != chip_8001) {
 747                         pm8001_dev->setds_completion = &completion_setstate;
 748                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 749                                 pm8001_dev, 0x01);
 750                         wait_for_completion(&completion_setstate);
 751                 }
 752                 res = -TMF_RESP_FUNC_FAILED;
 753                 /* Even TMF timed out, return direct. */
 754                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 755                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 756                                 PM8001_FAIL_DBG(pm8001_ha,
 757                                         pm8001_printk("TMF task[%x]timeout.\n",
 758                                         tmf->tmf));
 759                                 goto ex_err;
 760                         }
 761                 }
 762
 763                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 764                         task->task_status.stat == SAM_STAT_GOOD) {
 765                         res = TMF_RESP_FUNC_COMPLETE;
 766                         break;
 767                 }
 768
 769                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 770                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 771                         /* no error, but return the number of bytes of
 772                         * underrun */
 773                         res = task->task_status.residual;
 774                         break;
 775                 }
 776
 777                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 778                         task->task_status.stat == SAS_DATA_OVERRUN) {
 779                         PM8001_FAIL_DBG(pm8001_ha,
 780                                 pm8001_printk("Blocked task error.\n"));
 781                         res = -EMSGSIZE;
 782                         break;
 783                 } else {
 784                         PM8001_EH_DBG(pm8001_ha,
 785                                 pm8001_printk(" Task to dev %016llx response:"
 786                                 "0x%x status 0x%x\n",
 787                                 SAS_ADDR(dev->sas_addr),
 788                                 task->task_status.resp,
 789                                 task->task_status.stat));
 790                         sas_free_task(task);
 791                         task = NULL;
 792                 }
 793         }
 794 ex_err:
 795         BUG_ON(retry == 3 && task != NULL);
 796         sas_free_task(task);
 797         return res;
 798 }
 799
 800 static int
 801 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 802         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 803         u32 task_tag)
 804 {
 805         int res, retry;
 806         u32 ccb_tag;
 807         struct pm8001_ccb_info *ccb;
 808         struct sas_task *task = NULL;
 809
 810         for (retry = 0; retry < 3; retry++) {
 811                 task = sas_alloc_slow_task(GFP_KERNEL);
 812                 if (!task)
 813                         return -ENOMEM;
 814
 815                 task->dev = dev;
 816                 task->task_proto = dev->tproto;
 817                 task->task_done = pm8001_task_done;
 818                 task->slow_task->timer.function = pm8001_tmf_timedout;
 819                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 820                 add_timer(&task->slow_task->timer);
 821
 822                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 823                 if (res)
 824                         goto ex_err;
 825                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 826                 ccb->device = pm8001_dev;
 827                 ccb->ccb_tag = ccb_tag;
 828                 ccb->task = task;
 829                 ccb->n_elem = 0;
 830
 831                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 832                         pm8001_dev, flag, task_tag, ccb_tag);
 833
 834                 if (res) {
 835                         del_timer(&task->slow_task->timer);
 836                         PM8001_FAIL_DBG(pm8001_ha,
 837                                 pm8001_printk("Executing internal task "
 838                                 "failed\n"));
 839                         goto ex_err;
 840                 }
 841                 wait_for_completion(&task->slow_task->completion);
 842                 res = TMF_RESP_FUNC_FAILED;
 843                 /* Even TMF timed out, return direct. */
 844                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 845                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 846                                 PM8001_FAIL_DBG(pm8001_ha,
 847                                         pm8001_printk("TMF task timeout.\n"));
 848                                 goto ex_err;
 849                         }
 850                 }
 851
 852                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 853                         task->task_status.stat == SAM_STAT_GOOD) {
 854                         res = TMF_RESP_FUNC_COMPLETE;
 855                         break;
 856
 857                 } else {
 858                         PM8001_EH_DBG(pm8001_ha,
 859                                 pm8001_printk(" Task to dev %016llx response: "
 860                                         "0x%x status 0x%x\n",
 861                                 SAS_ADDR(dev->sas_addr),
 862                                 task->task_status.resp,
 863                                 task->task_status.stat));
 864                         sas_free_task(task);
 865                         task = NULL;
 866                 }
 867         }
 868 ex_err:
 869         BUG_ON(retry == 3 && task != NULL);
 870         sas_free_task(task);
 871         return res;
 872 }
 873
 874 /**
 875   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 876   * @dev: the device structure which sas layer used.
 877   */
 878 static void pm8001_dev_gone_notify(struct domain_device *dev)
 879 {
 880         unsigned long flags = 0;
 881         struct pm8001_hba_info *pm8001_ha;
 882         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 883
 884         pm8001_ha = pm8001_find_ha_by_dev(dev);
 885         spin_lock_irqsave(&pm8001_ha->lock, flags);
 886         if (pm8001_dev) {
 887                 u32 device_id = pm8001_dev->device_id;
 888
 889                 PM8001_DISC_DBG(pm8001_ha,
 890                         pm8001_printk("found dev[%d:%x] is gone.\n",
 891                         pm8001_dev->device_id, pm8001_dev->dev_type));
 892                 if (atomic_read(&pm8001_dev->running_req)) {
 893                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 894                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 895                                 dev, 1, 0);
 896                         while (atomic_read(&pm8001_dev->running_req))
 897                                 msleep(20);
 898                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 899                 }
 900                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 901                 pm8001_free_dev(pm8001_dev);
 902         } else {
 903                 PM8001_DISC_DBG(pm8001_ha,
 904                         pm8001_printk("Found dev has gone.\n"));
 905         }
 906         dev->lldd_dev = NULL;
 907         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 908 }
 909
 910 void pm8001_dev_gone(struct domain_device *dev)
 911 {
 912         pm8001_dev_gone_notify(dev);
 913 }
 914
 915 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 916         u8 *lun, struct pm8001_tmf_task *tmf)
 917 {
 918         struct sas_ssp_task ssp_task;
 919         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 920                 return TMF_RESP_FUNC_ESUPP;
 921
 922         memcpy((u8 *)&ssp_task.LUN, lun, 8);
 923         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 924                 tmf);
 925 }
 926
 927 /* retry commands by ha, by task and/or by device */
 928 void pm8001_open_reject_retry(
 929         struct pm8001_hba_info *pm8001_ha,
 930         struct sas_task *task_to_close,
 931         struct pm8001_device *device_to_close)
 932 {
 933         int i;
 934         unsigned long flags;
 935
 936         if (pm8001_ha == NULL)
 937                 return;
 938
 939         spin_lock_irqsave(&pm8001_ha->lock, flags);
 940
 941         for (i = 0; i < PM8001_MAX_CCB; i++) {
 942                 struct sas_task *task;
 943                 struct task_status_struct *ts;
 944                 struct pm8001_device *pm8001_dev;
 945                 unsigned long flags1;
 946                 u32 tag;
 947                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 948
 949                 pm8001_dev = ccb->device;
 950                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 951                         continue;
 952                 if (!device_to_close) {
 953                         uintptr_t d = (uintptr_t)pm8001_dev
 954                                         - (uintptr_t)&pm8001_ha->devices;
 955                         if (((d % sizeof(*pm8001_dev)) != 0)
 956                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 957                                 continue;
 958                 } else if (pm8001_dev != device_to_close)
 959                         continue;
 960                 tag = ccb->ccb_tag;
 961                 if (!tag || (tag == 0xFFFFFFFF))
 962                         continue;
 963                 task = ccb->task;
 964                 if (!task || !task->task_done)
 965                         continue;
 966                 if (task_to_close && (task != task_to_close))
 967                         continue;
 968                 ts = &task->task_status;
 969                 ts->resp = SAS_TASK_COMPLETE;
 970                 /* Force the midlayer to retry */
 971                 ts->stat = SAS_OPEN_REJECT;
 972                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 973                 if (pm8001_dev)
 974                         atomic_dec(&pm8001_dev->running_req);
 975                 spin_lock_irqsave(&task->task_state_lock, flags1);
 976                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 977                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 978                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 979                 if (unlikely((task->task_state_flags
 980                                 & SAS_TASK_STATE_ABORTED))) {
 981                         spin_unlock_irqrestore(&task->task_state_lock,
 982                                 flags1);
 983                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 984                 } else {
 985                         spin_unlock_irqrestore(&task->task_state_lock,
 986                                 flags1);
 987                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 988                         mb();/* in order to force CPU ordering */
 989                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 990                         task->task_done(task);
 991                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 992                 }
 993         }
 994
 995         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 996 }
 997
 998 /**
 999   * Standard mandates link reset for ATA  (type 0) and hard reset for
1000   * SSP (type 1) , only for RECOVERY
1001   * @dev: the device structure for the device to reset.
1002   */
1003 int pm8001_I_T_nexus_reset(struct domain_device *dev)
1004 {
1005         int rc = TMF_RESP_FUNC_FAILED;
1006         struct pm8001_device *pm8001_dev;
1007         struct pm8001_hba_info *pm8001_ha;
1008         struct sas_phy *phy;
1009
1010         if (!dev || !dev->lldd_dev)
1011                 return -ENODEV;
1012
1013         pm8001_dev = dev->lldd_dev;
1014         pm8001_ha = pm8001_find_ha_by_dev(dev);
1015         phy = sas_get_local_phy(dev);
1016
1017         if (dev_is_sata(dev)) {
1018                 if (scsi_is_sas_phy_local(phy)) {
1019                         rc = 0;
1020                         goto out;
1021                 }
1022                 rc = sas_phy_reset(phy, 1);
1023                 if (rc) {
1024                         PM8001_EH_DBG(pm8001_ha,
1025                         pm8001_printk("phy reset failed for device %x\n"
1026                         "with rc %d\n", pm8001_dev->device_id, rc));
1027                         rc = TMF_RESP_FUNC_FAILED;
1028                         goto out;
1029                 }
1030                 msleep(2000);
1031                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1032                         dev, 1, 0);
1033                 if (rc) {
1034                         PM8001_EH_DBG(pm8001_ha,
1035                         pm8001_printk("task abort failed %x\n"
1036                         "with rc %d\n", pm8001_dev->device_id, rc));
1037                         rc = TMF_RESP_FUNC_FAILED;
1038                 }
1039         } else {
1040                 rc = sas_phy_reset(phy, 1);
1041                 msleep(2000);
1042         }
1043         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1044                 pm8001_dev->device_id, rc));
1045  out:
1046         sas_put_local_phy(phy);
1047         return rc;
1048 }
1049
1050 /*
1051 * This function handle the IT_NEXUS_XXX event or completion
1052 * status code for SSP/SATA/SMP I/O request.
1053 */
1054 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1055 {
1056         int rc = TMF_RESP_FUNC_FAILED;
1057         struct pm8001_device *pm8001_dev;
1058         struct pm8001_hba_info *pm8001_ha;
1059         struct sas_phy *phy;
1060
1061         if (!dev || !dev->lldd_dev)
1062                 return -1;
1063
1064         pm8001_dev = dev->lldd_dev;
1065         pm8001_ha = pm8001_find_ha_by_dev(dev);
1066
1067         PM8001_EH_DBG(pm8001_ha,
1068                         pm8001_printk("I_T_Nexus handler invoked !!"));
1069
1070         phy = sas_get_local_phy(dev);
1071
1072         if (dev_is_sata(dev)) {
1073                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1074                 if (scsi_is_sas_phy_local(phy)) {
1075                         rc = 0;
1076                         goto out;
1077                 }
1078                 /* send internal ssp/sata/smp abort command to FW */
1079                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1080                                                         dev, 1, 0);
1081                 msleep(100);
1082
1083                 /* deregister the target device */
1084                 pm8001_dev_gone_notify(dev);
1085                 msleep(200);
1086
1087                 /*send phy reset to hard reset target */
1088                 rc = sas_phy_reset(phy, 1);
1089                 msleep(2000);
1090                 pm8001_dev->setds_completion = &completion_setstate;
1091
1092                 wait_for_completion(&completion_setstate);
1093         } else {
1094                 /* send internal ssp/sata/smp abort command to FW */
1095                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1096                                                         dev, 1, 0);
1097                 msleep(100);
1098
1099                 /* deregister the target device */
1100                 pm8001_dev_gone_notify(dev);
1101                 msleep(200);
1102
1103                 /*send phy reset to hard reset target */
1104                 rc = sas_phy_reset(phy, 1);
1105                 msleep(2000);
1106         }
1107         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1108                 pm8001_dev->device_id, rc));
1109 out:
1110         sas_put_local_phy(phy);
1111
1112         return rc;
1113 }
1114 /* mandatory SAM-3, the task reset the specified LUN*/
1115 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1116 {
1117         int rc = TMF_RESP_FUNC_FAILED;
1118         struct pm8001_tmf_task tmf_task;
1119         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1120         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1121         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1122         if (dev_is_sata(dev)) {
1123                 struct sas_phy *phy = sas_get_local_phy(dev);
1124                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1125                         dev, 1, 0);
1126                 rc = sas_phy_reset(phy, 1);
1127                 sas_put_local_phy(phy);
1128                 pm8001_dev->setds_completion = &completion_setstate;
1129                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1130                         pm8001_dev, 0x01);
1131                 wait_for_completion(&completion_setstate);
1132         } else {
1133                 tmf_task.tmf = TMF_LU_RESET;
1134                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1135         }
1136         /* If failed, fall-through I_T_Nexus reset */
1137         PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1138                 pm8001_dev->device_id, rc));
1139         return rc;
1140 }
1141
1142 /* optional SAM-3 */
1143 int pm8001_query_task(struct sas_task *task)
1144 {
1145         u32 tag = 0xdeadbeef;
1146         int i = 0;
1147         struct scsi_lun lun;
1148         struct pm8001_tmf_task tmf_task;
1149         int rc = TMF_RESP_FUNC_FAILED;
1150         if (unlikely(!task || !task->lldd_task || !task->dev))
1151                 return rc;
1152
1153         if (task->task_proto & SAS_PROTOCOL_SSP) {
1154                 struct scsi_cmnd *cmnd = task->uldd_task;
1155                 struct domain_device *dev = task->dev;
1156                 struct pm8001_hba_info *pm8001_ha =
1157                         pm8001_find_ha_by_dev(dev);
1158
1159                 int_to_scsilun(cmnd->device->lun, &lun);
1160                 rc = pm8001_find_tag(task, &tag);
1161                 if (rc == 0) {
1162                         rc = TMF_RESP_FUNC_FAILED;
1163                         return rc;
1164                 }
1165                 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1166                 for (i = 0; i < 16; i++)
1167                         printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1168                 printk(KERN_INFO "]\n");
1169                 tmf_task.tmf =  TMF_QUERY_TASK;
1170                 tmf_task.tag_of_task_to_be_managed = tag;
1171
1172                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1173                 switch (rc) {
1174                 /* The task is still in Lun, release it then */
1175                 case TMF_RESP_FUNC_SUCC:
1176                         PM8001_EH_DBG(pm8001_ha,
1177                                 pm8001_printk("The task is still in Lun\n"));
1178                         break;
1179                 /* The task is not in Lun or failed, reset the phy */
1180                 case TMF_RESP_FUNC_FAILED:
1181                 case TMF_RESP_FUNC_COMPLETE:
1182                         PM8001_EH_DBG(pm8001_ha,
1183                         pm8001_printk("The task is not in Lun or failed,"
1184                         " reset the phy\n"));
1185                         break;
1186                 }
1187         }
1188         pr_err("pm80xx: rc= %d\n", rc);
1189         return rc;
1190 }
1191
1192 /*  mandatory SAM-3, still need free task/ccb info, abort the specified task */
1193 int pm8001_abort_task(struct sas_task *task)
1194 {
1195         unsigned long flags;
1196         u32 tag;
1197         struct domain_device *dev ;
1198         struct pm8001_hba_info *pm8001_ha;
1199         struct scsi_lun lun;
1200         struct pm8001_device *pm8001_dev;
1201         struct pm8001_tmf_task tmf_task;
1202         int rc = TMF_RESP_FUNC_FAILED, ret;
1203         u32 phy_id;
1204         struct sas_task_slow slow_task;
1205         if (unlikely(!task || !task->lldd_task || !task->dev))
1206                 return TMF_RESP_FUNC_FAILED;
1207         dev = task->dev;
1208         pm8001_dev = dev->lldd_dev;
1209         pm8001_ha = pm8001_find_ha_by_dev(dev);
1210         phy_id = pm8001_dev->attached_phy;
1211         ret = pm8001_find_tag(task, &tag);
1212         if (ret == 0) {
1213                 pm8001_printk("no tag for task:%p\n", task);
1214                 return TMF_RESP_FUNC_FAILED;
1215         }
1216         spin_lock_irqsave(&task->task_state_lock, flags);
1217         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1218                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1219                 return TMF_RESP_FUNC_COMPLETE;
1220         }
1221         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1222         if (task->slow_task == NULL) {
1223                 init_completion(&slow_task.completion);
1224                 task->slow_task = &slow_task;
1225         }
1226         spin_unlock_irqrestore(&task->task_state_lock, flags);
1227         if (task->task_proto & SAS_PROTOCOL_SSP) {
1228                 struct scsi_cmnd *cmnd = task->uldd_task;
1229                 int_to_scsilun(cmnd->device->lun, &lun);
1230                 tmf_task.tmf = TMF_ABORT_TASK;
1231                 tmf_task.tag_of_task_to_be_managed = tag;
1232                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1233                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1234                         pm8001_dev->sas_device, 0, tag);
1235         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1236                 task->task_proto & SAS_PROTOCOL_STP) {
1237                 if (pm8001_ha->chip_id == chip_8006) {
1238                         DECLARE_COMPLETION_ONSTACK(completion_reset);
1239                         DECLARE_COMPLETION_ONSTACK(completion);
1240                         struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1241
1242                         /* 1. Set Device state as Recovery */
1243                         pm8001_dev->setds_completion = &completion;
1244                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1245                                 pm8001_dev, 0x03);
1246                         wait_for_completion(&completion);
1247
1248                         /* 2. Send Phy Control Hard Reset */
1249                         reinit_completion(&completion);
1250                         phy->port_reset_status = PORT_RESET_TMO;
1251                         phy->reset_success = false;
1252                         phy->enable_completion = &completion;
1253                         phy->reset_completion = &completion_reset;
1254                         ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1255                                 PHY_HARD_RESET);
1256                         if (ret) {
1257                                 phy->enable_completion = NULL;
1258                                 phy->reset_completion = NULL;
1259                                 goto out;
1260                         }
1261
1262                         /* In the case of the reset timeout/fail we still
1263                          * abort the command at the firmware. The assumption
1264                          * here is that the drive is off doing something so
1265                          * that it's not processing requests, and we want to
1266                          * avoid getting a completion for this and either
1267                          * leaking the task in libsas or losing the race and
1268                          * getting a double free.
1269                          */
1270                         PM8001_MSG_DBG(pm8001_ha,
1271                                 pm8001_printk("Waiting for local phy ctl\n"));
1272                         ret = wait_for_completion_timeout(&completion,
1273                                         PM8001_TASK_TIMEOUT * HZ);
1274                         if (!ret || !phy->reset_success) {
1275                                 phy->enable_completion = NULL;
1276                                 phy->reset_completion = NULL;
1277                         } else {
1278                                 /* 3. Wait for Port Reset complete or
1279                                  * Port reset TMO
1280                                  */
1281                                 PM8001_MSG_DBG(pm8001_ha,
1282                                 pm8001_printk("Waiting for Port reset\n"));
1283                                 ret = wait_for_completion_timeout(
1284                                         &completion_reset,
1285                                         PM8001_TASK_TIMEOUT * HZ);
1286                                 if (!ret)
1287                                         phy->reset_completion = NULL;
1288                                 WARN_ON(phy->port_reset_status ==
1289                                                 PORT_RESET_TMO);
1290                                 if (phy->port_reset_status == PORT_RESET_TMO) {
1291                                         pm8001_dev_gone_notify(dev);
1292                                         goto out;
1293                                 }
1294                         }
1295
1296                         /*
1297                          * 4. SATA Abort ALL
1298                          * we wait for the task to be aborted so that the task
1299                          * is removed from the ccb. on success the caller is
1300                          * going to free the task.
1301                          */
1302                         ret = pm8001_exec_internal_task_abort(pm8001_ha,
1303                                 pm8001_dev, pm8001_dev->sas_device, 1, tag);
1304                         if (ret)
1305                                 goto out;
1306                         ret = wait_for_completion_timeout(
1307                                 &task->slow_task->completion,
1308                                 PM8001_TASK_TIMEOUT * HZ);
1309                         if (!ret)
1310                                 goto out;
1311
1312                         /* 5. Set Device State as Operational */
1313                         reinit_completion(&completion);
1314                         pm8001_dev->setds_completion = &completion;
1315                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1316                                 pm8001_dev, 0x01);
1317                         wait_for_completion(&completion);
1318                 } else {
1319                         rc = pm8001_exec_internal_task_abort(pm8001_ha,
1320                                 pm8001_dev, pm8001_dev->sas_device, 0, tag);
1321                 }
1322                 rc = TMF_RESP_FUNC_COMPLETE;
1323         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1324                 /* SMP */
1325                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1326                         pm8001_dev->sas_device, 0, tag);
1327
1328         }
1329 out:
1330         spin_lock_irqsave(&task->task_state_lock, flags);
1331         if (task->slow_task == &slow_task)
1332                 task->slow_task = NULL;
1333         spin_unlock_irqrestore(&task->task_state_lock, flags);
1334         if (rc != TMF_RESP_FUNC_COMPLETE)
1335                 pm8001_printk("rc= %d\n", rc);
1336         return rc;
1337 }
1338
1339 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1340 {
1341         struct pm8001_tmf_task tmf_task;
1342
1343         tmf_task.tmf = TMF_ABORT_TASK_SET;
1344         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1345 }
1346
1347 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1348 {
1349         struct pm8001_tmf_task tmf_task;
1350
1351         tmf_task.tmf = TMF_CLEAR_ACA;
1352         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1353 }
1354
1355 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1356 {
1357         struct pm8001_tmf_task tmf_task;
1358         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1359         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1360
1361         PM8001_EH_DBG(pm8001_ha,
1362                 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1363                 pm8001_dev->device_id));
1364         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1365         return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1366 }
1367