drivers/scsi/pm8001/pm8001_sas.c

   1 /*
   2  * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
   3  *
   4  * Copyright (c) 2008-2009 USI Co., Ltd.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification.
  13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14  *    substantially similar to the "NO WARRANTY" disclaimer below
  15  *    ("Disclaimer") and any redistribution must be conditioned upon
  16  *    including a substantially similar Disclaimer requirement for further
  17  *    binary redistribution.
  18  * 3. Neither the names of the above-listed copyright holders nor the names
  19  *    of any contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * Alternatively, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2 as published by the Free
  24  * Software Foundation.
  25  *
  26  * NO WARRANTY
  27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  30  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  36  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGES.
  38  *
  39  */
  40
  41 #include <linux/slab.h>
  42 #include "pm8001_sas.h"
  43
  44 /**
  45  * pm8001_find_tag - from sas task to find out  tag that belongs to this task
  46  * @task: the task sent to the LLDD
  47  * @tag: the found tag associated with the task
  48  */
  49 static int pm8001_find_tag(struct sas_task *task, u32 *tag)
  50 {
  51         if (task->lldd_task) {
  52                 struct pm8001_ccb_info *ccb;
  53                 ccb = task->lldd_task;
  54                 *tag = ccb->ccb_tag;
  55                 return 1;
  56         }
  57         return 0;
  58 }
  59
  60 /**
  61   * pm8001_tag_free - free the no more needed tag
  62   * @pm8001_ha: our hba struct
  63   * @tag: the found tag associated with the task
  64   */
  65 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
  66 {
  67         void *bitmap = pm8001_ha->tags;
  68         clear_bit(tag, bitmap);
  69 }
  70
  71 /**
  72   * pm8001_tag_alloc - allocate a empty tag for task used.
  73   * @pm8001_ha: our hba struct
  74   * @tag_out: the found empty tag .
  75   */
  76 inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
  77 {
  78         unsigned int tag;
  79         void *bitmap = pm8001_ha->tags;
  80         unsigned long flags;
  81
  82         spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
  83         tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
  84         if (tag >= pm8001_ha->tags_num) {
  85                 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  86                 return -SAS_QUEUE_FULL;
  87         }
  88         set_bit(tag, bitmap);
  89         spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
  90         *tag_out = tag;
  91         return 0;
  92 }
  93
  94 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
  95 {
  96         int i;
  97         for (i = 0; i < pm8001_ha->tags_num; ++i)
  98                 pm8001_tag_free(pm8001_ha, i);
  99 }
 100
 101  /**
 102   * pm8001_mem_alloc - allocate memory for pm8001.
 103   * @pdev: pci device.
 104   * @virt_addr: the allocated virtual address
 105   * @pphys_addr_hi: the physical address high byte address.
 106   * @pphys_addr_lo: the physical address low byte address.
 107   * @mem_size: memory size.
 108   */
 109 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
 110         dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
 111         u32 *pphys_addr_lo, u32 mem_size, u32 align)
 112 {
 113         caddr_t mem_virt_alloc;
 114         dma_addr_t mem_dma_handle;
 115         u64 phys_align;
 116         u64 align_offset = 0;
 117         if (align)
 118                 align_offset = (dma_addr_t)align - 1;
 119         mem_virt_alloc = pci_zalloc_consistent(pdev, mem_size + align,
 120                                                &mem_dma_handle);
 121         if (!mem_virt_alloc) {
 122                 pm8001_printk("memory allocation error\n");
 123                 return -1;
 124         }
 125         *pphys_addr = mem_dma_handle;
 126         phys_align = (*pphys_addr + align_offset) & ~align_offset;
 127         *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
 128         *pphys_addr_hi = upper_32_bits(phys_align);
 129         *pphys_addr_lo = lower_32_bits(phys_align);
 130         return 0;
 131 }
 132 /**
 133   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 134   * find out our hba struct.
 135   * @dev: the domain device which from sas layer.
 136   */
 137 static
 138 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 139 {
 140         struct sas_ha_struct *sha = dev->port->ha;
 141         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 142         return pm8001_ha;
 143 }
 144
 145 /**
 146   * pm8001_phy_control - this function should be registered to
 147   * sas_domain_function_template to provide libsas used, note: this is just
 148   * control the HBA phy rather than other expander phy if you want control
 149   * other phy, you should use SMP command.
 150   * @sas_phy: which phy in HBA phys.
 151   * @func: the operation.
 152   * @funcdata: always NULL.
 153   */
 154 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 155         void *funcdata)
 156 {
 157         int rc = 0, phy_id = sas_phy->id;
 158         struct pm8001_hba_info *pm8001_ha = NULL;
 159         struct sas_phy_linkrates *rates;
 160         DECLARE_COMPLETION_ONSTACK(completion);
 161         unsigned long flags;
 162         pm8001_ha = sas_phy->ha->lldd_ha;
 163         pm8001_ha->phy[phy_id].enable_completion = &completion;
 164         switch (func) {
 165         case PHY_FUNC_SET_LINK_RATE:
 166                 rates = funcdata;
 167                 if (rates->minimum_linkrate) {
 168                         pm8001_ha->phy[phy_id].minimum_linkrate =
 169                                 rates->minimum_linkrate;
 170                 }
 171                 if (rates->maximum_linkrate) {
 172                         pm8001_ha->phy[phy_id].maximum_linkrate =
 173                                 rates->maximum_linkrate;
 174                 }
 175                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 176                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 177                         wait_for_completion(&completion);
 178                 }
 179                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 180                                               PHY_LINK_RESET);
 181                 break;
 182         case PHY_FUNC_HARD_RESET:
 183                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 184                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 185                         wait_for_completion(&completion);
 186                 }
 187                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 188                                               PHY_HARD_RESET);
 189                 break;
 190         case PHY_FUNC_LINK_RESET:
 191                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 192                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 193                         wait_for_completion(&completion);
 194                 }
 195                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 196                                               PHY_LINK_RESET);
 197                 break;
 198         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 199                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 200                                               PHY_LINK_RESET);
 201                 break;
 202         case PHY_FUNC_DISABLE:
 203                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 204                 break;
 205         case PHY_FUNC_GET_EVENTS:
 206                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 207                 if (pm8001_ha->chip_id == chip_8001) {
 208                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 209                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 210                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 211                                 return -EINVAL;
 212                         }
 213                 }
 214                 {
 215                         struct sas_phy *phy = sas_phy->phy;
 216                         uint32_t *qp = (uint32_t *)(((char *)
 217                                 pm8001_ha->io_mem[2].memvirtaddr)
 218                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 219
 220                         phy->invalid_dword_count = qp[0];
 221                         phy->running_disparity_error_count = qp[1];
 222                         phy->loss_of_dword_sync_count = qp[3];
 223                         phy->phy_reset_problem_count = qp[4];
 224                 }
 225                 if (pm8001_ha->chip_id == chip_8001)
 226                         pm8001_bar4_shift(pm8001_ha, 0);
 227                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 228                 return 0;
 229         default:
 230                 rc = -EOPNOTSUPP;
 231         }
 232         msleep(300);
 233         return rc;
 234 }
 235
 236 /**
 237   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 238   * command to HBA.
 239   * @shost: the scsi host data.
 240   */
 241 void pm8001_scan_start(struct Scsi_Host *shost)
 242 {
 243         int i;
 244         struct pm8001_hba_info *pm8001_ha;
 245         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 246         pm8001_ha = sha->lldd_ha;
 247         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 248         if (pm8001_ha->chip_id == chip_8001)
 249                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 250         for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
 251                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 252 }
 253
 254 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 255 {
 256         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 257
 258         /* give the phy enabling interrupt event time to come in (1s
 259         * is empirically about all it takes) */
 260         if (time < HZ)
 261                 return 0;
 262         /* Wait for discovery to finish */
 263         sas_drain_work(ha);
 264         return 1;
 265 }
 266
 267 /**
 268   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 269   * @pm8001_ha: our hba card information
 270   * @ccb: the ccb which attached to smp task
 271   */
 272 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 273         struct pm8001_ccb_info *ccb)
 274 {
 275         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 276 }
 277
 278 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 279 {
 280         struct ata_queued_cmd *qc = task->uldd_task;
 281         if (qc) {
 282                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 283                     qc->tf.command == ATA_CMD_FPDMA_READ ||
 284                     qc->tf.command == ATA_CMD_FPDMA_RECV ||
 285                     qc->tf.command == ATA_CMD_FPDMA_SEND ||
 286                     qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
 287                         *tag = qc->tag;
 288                         return 1;
 289                 }
 290         }
 291         return 0;
 292 }
 293
 294 /**
 295   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 296   * @pm8001_ha: our hba card information
 297   * @ccb: the ccb which attached to sata task
 298   */
 299 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 300         struct pm8001_ccb_info *ccb)
 301 {
 302         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 303 }
 304
 305 /**
 306   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 307   * @pm8001_ha: our hba card information
 308   * @ccb: the ccb which attached to TM
 309   * @tmf: the task management IU
 310   */
 311 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 312         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 313 {
 314         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 315 }
 316
 317 /**
 318   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 319   * @pm8001_ha: our hba card information
 320   * @ccb: the ccb which attached to ssp task
 321   */
 322 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 323         struct pm8001_ccb_info *ccb)
 324 {
 325         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 326 }
 327
 328  /* Find the local port id that's attached to this device */
 329 static int sas_find_local_port_id(struct domain_device *dev)
 330 {
 331         struct domain_device *pdev = dev->parent;
 332
 333         /* Directly attached device */
 334         if (!pdev)
 335                 return dev->port->id;
 336         while (pdev) {
 337                 struct domain_device *pdev_p = pdev->parent;
 338                 if (!pdev_p)
 339                         return pdev->port->id;
 340                 pdev = pdev->parent;
 341         }
 342         return 0;
 343 }
 344
 345 /**
 346   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 347   * @task: the task to be execute.
 348   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 349   * we always execute one one time.
 350   * @gfp_flags: gfp_flags.
 351   * @is_tmf: if it is task management task.
 352   * @tmf: the task management IU
 353   */
 354 #define DEV_IS_GONE(pm8001_dev) \
 355         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 356 static int pm8001_task_exec(struct sas_task *task,
 357         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 358 {
 359         struct domain_device *dev = task->dev;
 360         struct pm8001_hba_info *pm8001_ha;
 361         struct pm8001_device *pm8001_dev;
 362         struct pm8001_port *port = NULL;
 363         struct sas_task *t = task;
 364         struct pm8001_ccb_info *ccb;
 365         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 366         unsigned long flags = 0;
 367
 368         if (!dev->port) {
 369                 struct task_status_struct *tsm = &t->task_status;
 370                 tsm->resp = SAS_TASK_UNDELIVERED;
 371                 tsm->stat = SAS_PHY_DOWN;
 372                 if (dev->dev_type != SAS_SATA_DEV)
 373                         t->task_done(t);
 374                 return 0;
 375         }
 376         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 377         if (pm8001_ha->controller_fatal_error) {
 378                 struct task_status_struct *ts = &t->task_status;
 379
 380                 ts->resp = SAS_TASK_UNDELIVERED;
 381                 t->task_done(t);
 382                 return 0;
 383         }
 384         PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 385         spin_lock_irqsave(&pm8001_ha->lock, flags);
 386         do {
 387                 dev = t->dev;
 388                 pm8001_dev = dev->lldd_dev;
 389                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 390                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 391                         if (sas_protocol_ata(t->task_proto)) {
 392                                 struct task_status_struct *ts = &t->task_status;
 393                                 ts->resp = SAS_TASK_UNDELIVERED;
 394                                 ts->stat = SAS_PHY_DOWN;
 395
 396                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 397                                 t->task_done(t);
 398                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 399                                 continue;
 400                         } else {
 401                                 struct task_status_struct *ts = &t->task_status;
 402                                 ts->resp = SAS_TASK_UNDELIVERED;
 403                                 ts->stat = SAS_PHY_DOWN;
 404                                 t->task_done(t);
 405                                 continue;
 406                         }
 407                 }
 408                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 409                 if (rc)
 410                         goto err_out;
 411                 ccb = &pm8001_ha->ccb_info[tag];
 412
 413                 if (!sas_protocol_ata(t->task_proto)) {
 414                         if (t->num_scatter) {
 415                                 n_elem = dma_map_sg(pm8001_ha->dev,
 416                                         t->scatter,
 417                                         t->num_scatter,
 418                                         t->data_dir);
 419                                 if (!n_elem) {
 420                                         rc = -ENOMEM;
 421                                         goto err_out_tag;
 422                                 }
 423                         }
 424                 } else {
 425                         n_elem = t->num_scatter;
 426                 }
 427
 428                 t->lldd_task = ccb;
 429                 ccb->n_elem = n_elem;
 430                 ccb->ccb_tag = tag;
 431                 ccb->task = t;
 432                 ccb->device = pm8001_dev;
 433                 switch (t->task_proto) {
 434                 case SAS_PROTOCOL_SMP:
 435                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 436                         break;
 437                 case SAS_PROTOCOL_SSP:
 438                         if (is_tmf)
 439                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 440                                         ccb, tmf);
 441                         else
 442                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 443                         break;
 444                 case SAS_PROTOCOL_SATA:
 445                 case SAS_PROTOCOL_STP:
 446                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 447                         break;
 448                 default:
 449                         dev_printk(KERN_ERR, pm8001_ha->dev,
 450                                 "unknown sas_task proto: 0x%x\n",
 451                                 t->task_proto);
 452                         rc = -EINVAL;
 453                         break;
 454                 }
 455
 456                 if (rc) {
 457                         PM8001_IO_DBG(pm8001_ha,
 458                                 pm8001_printk("rc is %x\n", rc));
 459                         goto err_out_tag;
 460                 }
 461                 /* TODO: select normal or high priority */
 462                 spin_lock(&t->task_state_lock);
 463                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 464                 spin_unlock(&t->task_state_lock);
 465                 pm8001_dev->running_req++;
 466         } while (0);
 467         rc = 0;
 468         goto out_done;
 469
 470 err_out_tag:
 471         pm8001_tag_free(pm8001_ha, tag);
 472 err_out:
 473         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 474         if (!sas_protocol_ata(t->task_proto))
 475                 if (n_elem)
 476                         dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
 477                                 t->data_dir);
 478 out_done:
 479         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 480         return rc;
 481 }
 482
 483 /**
 484   * pm8001_queue_command - register for upper layer used, all IO commands sent
 485   * to HBA are from this interface.
 486   * @task: the task to be execute.
 487   * @gfp_flags: gfp_flags
 488   */
 489 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 490 {
 491         return pm8001_task_exec(task, gfp_flags, 0, NULL);
 492 }
 493
 494 /**
 495   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 496   * @pm8001_ha: our hba card information
 497   * @ccb: the ccb which attached to ssp task
 498   * @task: the task to be free.
 499   * @ccb_idx: ccb index.
 500   */
 501 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 502         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 503 {
 504         if (!ccb->task)
 505                 return;
 506         if (!sas_protocol_ata(task->task_proto))
 507                 if (ccb->n_elem)
 508                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 509                                 task->num_scatter, task->data_dir);
 510
 511         switch (task->task_proto) {
 512         case SAS_PROTOCOL_SMP:
 513                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 514                         PCI_DMA_FROMDEVICE);
 515                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 516                         PCI_DMA_TODEVICE);
 517                 break;
 518
 519         case SAS_PROTOCOL_SATA:
 520         case SAS_PROTOCOL_STP:
 521         case SAS_PROTOCOL_SSP:
 522         default:
 523                 /* do nothing */
 524                 break;
 525         }
 526         task->lldd_task = NULL;
 527         ccb->task = NULL;
 528         ccb->ccb_tag = 0xFFFFFFFF;
 529         ccb->open_retry = 0;
 530         pm8001_tag_free(pm8001_ha, ccb_idx);
 531 }
 532
 533  /**
 534   * pm8001_alloc_dev - find a empty pm8001_device
 535   * @pm8001_ha: our hba card information
 536   */
 537 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 538 {
 539         u32 dev;
 540         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 541                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 542                         pm8001_ha->devices[dev].id = dev;
 543                         return &pm8001_ha->devices[dev];
 544                 }
 545         }
 546         if (dev == PM8001_MAX_DEVICES) {
 547                 PM8001_FAIL_DBG(pm8001_ha,
 548                         pm8001_printk("max support %d devices, ignore ..\n",
 549                         PM8001_MAX_DEVICES));
 550         }
 551         return NULL;
 552 }
 553 /**
 554   * pm8001_find_dev - find a matching pm8001_device
 555   * @pm8001_ha: our hba card information
 556   */
 557 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 558                                         u32 device_id)
 559 {
 560         u32 dev;
 561         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 562                 if (pm8001_ha->devices[dev].device_id == device_id)
 563                         return &pm8001_ha->devices[dev];
 564         }
 565         if (dev == PM8001_MAX_DEVICES) {
 566                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 567                                 "DEVICE FOUND !!!\n"));
 568         }
 569         return NULL;
 570 }
 571
 572 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 573 {
 574         u32 id = pm8001_dev->id;
 575         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 576         pm8001_dev->id = id;
 577         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 578         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 579         pm8001_dev->sas_device = NULL;
 580 }
 581
 582 /**
 583   * pm8001_dev_found_notify - libsas notify a device is found.
 584   * @dev: the device structure which sas layer used.
 585   *
 586   * when libsas find a sas domain device, it should tell the LLDD that
 587   * device is found, and then LLDD register this device to HBA firmware
 588   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 589   * device ID(according to device's sas address) and returned it to LLDD. From
 590   * now on, we communicate with HBA FW with the device ID which HBA assigned
 591   * rather than sas address. it is the necessary step for our HBA but it is
 592   * the optional for other HBA driver.
 593   */
 594 static int pm8001_dev_found_notify(struct domain_device *dev)
 595 {
 596         unsigned long flags = 0;
 597         int res = 0;
 598         struct pm8001_hba_info *pm8001_ha = NULL;
 599         struct domain_device *parent_dev = dev->parent;
 600         struct pm8001_device *pm8001_device;
 601         DECLARE_COMPLETION_ONSTACK(completion);
 602         u32 flag = 0;
 603         pm8001_ha = pm8001_find_ha_by_dev(dev);
 604         spin_lock_irqsave(&pm8001_ha->lock, flags);
 605
 606         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 607         if (!pm8001_device) {
 608                 res = -1;
 609                 goto found_out;
 610         }
 611         pm8001_device->sas_device = dev;
 612         dev->lldd_dev = pm8001_device;
 613         pm8001_device->dev_type = dev->dev_type;
 614         pm8001_device->dcompletion = &completion;
 615         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 616                 int phy_id;
 617                 struct ex_phy *phy;
 618                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 619                 phy_id++) {
 620                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 621                         if (SAS_ADDR(phy->attached_sas_addr)
 622                                 == SAS_ADDR(dev->sas_addr)) {
 623                                 pm8001_device->attached_phy = phy_id;
 624                                 break;
 625                         }
 626                 }
 627                 if (phy_id == parent_dev->ex_dev.num_phys) {
 628                         PM8001_FAIL_DBG(pm8001_ha,
 629                         pm8001_printk("Error: no attached dev:%016llx"
 630                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 631                                 SAS_ADDR(parent_dev->sas_addr)));
 632                         res = -1;
 633                 }
 634         } else {
 635                 if (dev->dev_type == SAS_SATA_DEV) {
 636                         pm8001_device->attached_phy =
 637                                 dev->rphy->identify.phy_identifier;
 638                                 flag = 1; /* directly sata*/
 639                 }
 640         } /*register this device to HBA*/
 641         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 642         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 643         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 644         wait_for_completion(&completion);
 645         if (dev->dev_type == SAS_END_DEVICE)
 646                 msleep(50);
 647         pm8001_ha->flags = PM8001F_RUN_TIME;
 648         return 0;
 649 found_out:
 650         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 651         return res;
 652 }
 653
 654 int pm8001_dev_found(struct domain_device *dev)
 655 {
 656         return pm8001_dev_found_notify(dev);
 657 }
 658
 659 void pm8001_task_done(struct sas_task *task)
 660 {
 661         if (!del_timer(&task->slow_task->timer))
 662                 return;
 663         complete(&task->slow_task->completion);
 664 }
 665
 666 static void pm8001_tmf_timedout(struct timer_list *t)
 667 {
 668         struct sas_task_slow *slow = from_timer(slow, t, timer);
 669         struct sas_task *task = slow->task;
 670
 671         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 672         complete(&task->slow_task->completion);
 673 }
 674
 675 #define PM8001_TASK_TIMEOUT 20
 676 /**
 677   * pm8001_exec_internal_tmf_task - execute some task management commands.
 678   * @dev: the wanted device.
 679   * @tmf: which task management wanted to be take.
 680   * @para_len: para_len.
 681   * @parameter: ssp task parameter.
 682   *
 683   * when errors or exception happened, we may want to do something, for example
 684   * abort the issued task which result in this execption, it is done by calling
 685   * this function, note it is also with the task execute interface.
 686   */
 687 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 688         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 689 {
 690         int res, retry;
 691         struct sas_task *task = NULL;
 692         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 693         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 694         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 695
 696         for (retry = 0; retry < 3; retry++) {
 697                 task = sas_alloc_slow_task(GFP_KERNEL);
 698                 if (!task)
 699                         return -ENOMEM;
 700
 701                 task->dev = dev;
 702                 task->task_proto = dev->tproto;
 703                 memcpy(&task->ssp_task, parameter, para_len);
 704                 task->task_done = pm8001_task_done;
 705                 task->slow_task->timer.function = pm8001_tmf_timedout;
 706                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 707                 add_timer(&task->slow_task->timer);
 708
 709                 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 710
 711                 if (res) {
 712                         del_timer(&task->slow_task->timer);
 713                         PM8001_FAIL_DBG(pm8001_ha,
 714                                 pm8001_printk("Executing internal task "
 715                                 "failed\n"));
 716                         goto ex_err;
 717                 }
 718                 wait_for_completion(&task->slow_task->completion);
 719                 if (pm8001_ha->chip_id != chip_8001) {
 720                         pm8001_dev->setds_completion = &completion_setstate;
 721                                 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 722                                         pm8001_dev, 0x01);
 723                         wait_for_completion(&completion_setstate);
 724                 }
 725                 res = -TMF_RESP_FUNC_FAILED;
 726                 /* Even TMF timed out, return direct. */
 727                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 728                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 729                                 PM8001_FAIL_DBG(pm8001_ha,
 730                                         pm8001_printk("TMF task[%x]timeout.\n",
 731                                         tmf->tmf));
 732                                 goto ex_err;
 733                         }
 734                 }
 735
 736                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 737                         task->task_status.stat == SAM_STAT_GOOD) {
 738                         res = TMF_RESP_FUNC_COMPLETE;
 739                         break;
 740                 }
 741
 742                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 743                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 744                         /* no error, but return the number of bytes of
 745                         * underrun */
 746                         res = task->task_status.residual;
 747                         break;
 748                 }
 749
 750                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 751                         task->task_status.stat == SAS_DATA_OVERRUN) {
 752                         PM8001_FAIL_DBG(pm8001_ha,
 753                                 pm8001_printk("Blocked task error.\n"));
 754                         res = -EMSGSIZE;
 755                         break;
 756                 } else {
 757                         PM8001_EH_DBG(pm8001_ha,
 758                                 pm8001_printk(" Task to dev %016llx response:"
 759                                 "0x%x status 0x%x\n",
 760                                 SAS_ADDR(dev->sas_addr),
 761                                 task->task_status.resp,
 762                                 task->task_status.stat));
 763                         sas_free_task(task);
 764                         task = NULL;
 765                 }
 766         }
 767 ex_err:
 768         BUG_ON(retry == 3 && task != NULL);
 769         sas_free_task(task);
 770         return res;
 771 }
 772
 773 static int
 774 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 775         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 776         u32 task_tag)
 777 {
 778         int res, retry;
 779         u32 ccb_tag;
 780         struct pm8001_ccb_info *ccb;
 781         struct sas_task *task = NULL;
 782
 783         for (retry = 0; retry < 3; retry++) {
 784                 task = sas_alloc_slow_task(GFP_KERNEL);
 785                 if (!task)
 786                         return -ENOMEM;
 787
 788                 task->dev = dev;
 789                 task->task_proto = dev->tproto;
 790                 task->task_done = pm8001_task_done;
 791                 task->slow_task->timer.function = pm8001_tmf_timedout;
 792                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 793                 add_timer(&task->slow_task->timer);
 794
 795                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 796                 if (res)
 797                         goto ex_err;
 798                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 799                 ccb->device = pm8001_dev;
 800                 ccb->ccb_tag = ccb_tag;
 801                 ccb->task = task;
 802                 ccb->n_elem = 0;
 803
 804                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 805                         pm8001_dev, flag, task_tag, ccb_tag);
 806
 807                 if (res) {
 808                         del_timer(&task->slow_task->timer);
 809                         PM8001_FAIL_DBG(pm8001_ha,
 810                                 pm8001_printk("Executing internal task "
 811                                 "failed\n"));
 812                         goto ex_err;
 813                 }
 814                 wait_for_completion(&task->slow_task->completion);
 815                 res = TMF_RESP_FUNC_FAILED;
 816                 /* Even TMF timed out, return direct. */
 817                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 818                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 819                                 PM8001_FAIL_DBG(pm8001_ha,
 820                                         pm8001_printk("TMF task timeout.\n"));
 821                                 goto ex_err;
 822                         }
 823                 }
 824
 825                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 826                         task->task_status.stat == SAM_STAT_GOOD) {
 827                         res = TMF_RESP_FUNC_COMPLETE;
 828                         break;
 829
 830                 } else {
 831                         PM8001_EH_DBG(pm8001_ha,
 832                                 pm8001_printk(" Task to dev %016llx response: "
 833                                         "0x%x status 0x%x\n",
 834                                 SAS_ADDR(dev->sas_addr),
 835                                 task->task_status.resp,
 836                                 task->task_status.stat));
 837                         sas_free_task(task);
 838                         task = NULL;
 839                 }
 840         }
 841 ex_err:
 842         BUG_ON(retry == 3 && task != NULL);
 843         sas_free_task(task);
 844         return res;
 845 }
 846
 847 /**
 848   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 849   * @dev: the device structure which sas layer used.
 850   */
 851 static void pm8001_dev_gone_notify(struct domain_device *dev)
 852 {
 853         unsigned long flags = 0;
 854         struct pm8001_hba_info *pm8001_ha;
 855         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 856
 857         pm8001_ha = pm8001_find_ha_by_dev(dev);
 858         spin_lock_irqsave(&pm8001_ha->lock, flags);
 859         if (pm8001_dev) {
 860                 u32 device_id = pm8001_dev->device_id;
 861
 862                 PM8001_DISC_DBG(pm8001_ha,
 863                         pm8001_printk("found dev[%d:%x] is gone.\n",
 864                         pm8001_dev->device_id, pm8001_dev->dev_type));
 865                 if (pm8001_dev->running_req) {
 866                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 867                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 868                                 dev, 1, 0);
 869                         while (pm8001_dev->running_req)
 870                                 msleep(20);
 871                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 872                 }
 873                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 874                 pm8001_free_dev(pm8001_dev);
 875         } else {
 876                 PM8001_DISC_DBG(pm8001_ha,
 877                         pm8001_printk("Found dev has gone.\n"));
 878         }
 879         dev->lldd_dev = NULL;
 880         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 881 }
 882
 883 void pm8001_dev_gone(struct domain_device *dev)
 884 {
 885         pm8001_dev_gone_notify(dev);
 886 }
 887
 888 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 889         u8 *lun, struct pm8001_tmf_task *tmf)
 890 {
 891         struct sas_ssp_task ssp_task;
 892         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 893                 return TMF_RESP_FUNC_ESUPP;
 894
 895         strncpy((u8 *)&ssp_task.LUN, lun, 8);
 896         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 897                 tmf);
 898 }
 899
 900 /* retry commands by ha, by task and/or by device */
 901 void pm8001_open_reject_retry(
 902         struct pm8001_hba_info *pm8001_ha,
 903         struct sas_task *task_to_close,
 904         struct pm8001_device *device_to_close)
 905 {
 906         int i;
 907         unsigned long flags;
 908
 909         if (pm8001_ha == NULL)
 910                 return;
 911
 912         spin_lock_irqsave(&pm8001_ha->lock, flags);
 913
 914         for (i = 0; i < PM8001_MAX_CCB; i++) {
 915                 struct sas_task *task;
 916                 struct task_status_struct *ts;
 917                 struct pm8001_device *pm8001_dev;
 918                 unsigned long flags1;
 919                 u32 tag;
 920                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 921
 922                 pm8001_dev = ccb->device;
 923                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 924                         continue;
 925                 if (!device_to_close) {
 926                         uintptr_t d = (uintptr_t)pm8001_dev
 927                                         - (uintptr_t)&pm8001_ha->devices;
 928                         if (((d % sizeof(*pm8001_dev)) != 0)
 929                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 930                                 continue;
 931                 } else if (pm8001_dev != device_to_close)
 932                         continue;
 933                 tag = ccb->ccb_tag;
 934                 if (!tag || (tag == 0xFFFFFFFF))
 935                         continue;
 936                 task = ccb->task;
 937                 if (!task || !task->task_done)
 938                         continue;
 939                 if (task_to_close && (task != task_to_close))
 940                         continue;
 941                 ts = &task->task_status;
 942                 ts->resp = SAS_TASK_COMPLETE;
 943                 /* Force the midlayer to retry */
 944                 ts->stat = SAS_OPEN_REJECT;
 945                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 946                 if (pm8001_dev)
 947                         pm8001_dev->running_req--;
 948                 spin_lock_irqsave(&task->task_state_lock, flags1);
 949                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 950                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 951                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 952                 if (unlikely((task->task_state_flags
 953                                 & SAS_TASK_STATE_ABORTED))) {
 954                         spin_unlock_irqrestore(&task->task_state_lock,
 955                                 flags1);
 956                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 957                 } else {
 958                         spin_unlock_irqrestore(&task->task_state_lock,
 959                                 flags1);
 960                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 961                         mb();/* in order to force CPU ordering */
 962                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 963                         task->task_done(task);
 964                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 965                 }
 966         }
 967
 968         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 969 }
 970
 971 /**
 972   * Standard mandates link reset for ATA  (type 0) and hard reset for
 973   * SSP (type 1) , only for RECOVERY
 974   */
 975 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 976 {
 977         int rc = TMF_RESP_FUNC_FAILED;
 978         struct pm8001_device *pm8001_dev;
 979         struct pm8001_hba_info *pm8001_ha;
 980         struct sas_phy *phy;
 981
 982         if (!dev || !dev->lldd_dev)
 983                 return -ENODEV;
 984
 985         pm8001_dev = dev->lldd_dev;
 986         pm8001_ha = pm8001_find_ha_by_dev(dev);
 987         phy = sas_get_local_phy(dev);
 988
 989         if (dev_is_sata(dev)) {
 990                 if (scsi_is_sas_phy_local(phy)) {
 991                         rc = 0;
 992                         goto out;
 993                 }
 994                 rc = sas_phy_reset(phy, 1);
 995                 if (rc) {
 996                         PM8001_EH_DBG(pm8001_ha,
 997                         pm8001_printk("phy reset failed for device %x\n"
 998                         "with rc %d\n", pm8001_dev->device_id, rc));
 999                         rc = TMF_RESP_FUNC_FAILED;
1000                         goto out;
1001                 }
1002                 msleep(2000);
1003                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1004                         dev, 1, 0);
1005                 if (rc) {
1006                         PM8001_EH_DBG(pm8001_ha,
1007                         pm8001_printk("task abort failed %x\n"
1008                         "with rc %d\n", pm8001_dev->device_id, rc));
1009                         rc = TMF_RESP_FUNC_FAILED;
1010                 }
1011         } else {
1012                 rc = sas_phy_reset(phy, 1);
1013                 msleep(2000);
1014         }
1015         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1016                 pm8001_dev->device_id, rc));
1017  out:
1018         sas_put_local_phy(phy);
1019         return rc;
1020 }
1021
1022 /*
1023 * This function handle the IT_NEXUS_XXX event or completion
1024 * status code for SSP/SATA/SMP I/O request.
1025 */
1026 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1027 {
1028         int rc = TMF_RESP_FUNC_FAILED;
1029         struct pm8001_device *pm8001_dev;
1030         struct pm8001_hba_info *pm8001_ha;
1031         struct sas_phy *phy;
1032         u32 device_id = 0;
1033
1034         if (!dev || !dev->lldd_dev)
1035                 return -1;
1036
1037         pm8001_dev = dev->lldd_dev;
1038         device_id = pm8001_dev->device_id;
1039         pm8001_ha = pm8001_find_ha_by_dev(dev);
1040
1041         PM8001_EH_DBG(pm8001_ha,
1042                         pm8001_printk("I_T_Nexus handler invoked !!"));
1043
1044         phy = sas_get_local_phy(dev);
1045
1046         if (dev_is_sata(dev)) {
1047                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1048                 if (scsi_is_sas_phy_local(phy)) {
1049                         rc = 0;
1050                         goto out;
1051                 }
1052                 /* send internal ssp/sata/smp abort command to FW */
1053                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1054                                                         dev, 1, 0);
1055                 msleep(100);
1056
1057                 /* deregister the target device */
1058                 pm8001_dev_gone_notify(dev);
1059                 msleep(200);
1060
1061                 /*send phy reset to hard reset target */
1062                 rc = sas_phy_reset(phy, 1);
1063                 msleep(2000);
1064                 pm8001_dev->setds_completion = &completion_setstate;
1065
1066                 wait_for_completion(&completion_setstate);
1067         } else {
1068                 /* send internal ssp/sata/smp abort command to FW */
1069                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1070                                                         dev, 1, 0);
1071                 msleep(100);
1072
1073                 /* deregister the target device */
1074                 pm8001_dev_gone_notify(dev);
1075                 msleep(200);
1076
1077                 /*send phy reset to hard reset target */
1078                 rc = sas_phy_reset(phy, 1);
1079                 msleep(2000);
1080         }
1081         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1082                 pm8001_dev->device_id, rc));
1083 out:
1084         sas_put_local_phy(phy);
1085
1086         return rc;
1087 }
1088 /* mandatory SAM-3, the task reset the specified LUN*/
1089 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1090 {
1091         int rc = TMF_RESP_FUNC_FAILED;
1092         struct pm8001_tmf_task tmf_task;
1093         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1094         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1095         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1096         if (dev_is_sata(dev)) {
1097                 struct sas_phy *phy = sas_get_local_phy(dev);
1098                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1099                         dev, 1, 0);
1100                 rc = sas_phy_reset(phy, 1);
1101                 sas_put_local_phy(phy);
1102                 pm8001_dev->setds_completion = &completion_setstate;
1103                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1104                         pm8001_dev, 0x01);
1105                 wait_for_completion(&completion_setstate);
1106         } else {
1107                 tmf_task.tmf = TMF_LU_RESET;
1108                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1109         }
1110         /* If failed, fall-through I_T_Nexus reset */
1111         PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1112                 pm8001_dev->device_id, rc));
1113         return rc;
1114 }
1115
1116 /* optional SAM-3 */
1117 int pm8001_query_task(struct sas_task *task)
1118 {
1119         u32 tag = 0xdeadbeef;
1120         int i = 0;
1121         struct scsi_lun lun;
1122         struct pm8001_tmf_task tmf_task;
1123         int rc = TMF_RESP_FUNC_FAILED;
1124         if (unlikely(!task || !task->lldd_task || !task->dev))
1125                 return rc;
1126
1127         if (task->task_proto & SAS_PROTOCOL_SSP) {
1128                 struct scsi_cmnd *cmnd = task->uldd_task;
1129                 struct domain_device *dev = task->dev;
1130                 struct pm8001_hba_info *pm8001_ha =
1131                         pm8001_find_ha_by_dev(dev);
1132
1133                 int_to_scsilun(cmnd->device->lun, &lun);
1134                 rc = pm8001_find_tag(task, &tag);
1135                 if (rc == 0) {
1136                         rc = TMF_RESP_FUNC_FAILED;
1137                         return rc;
1138                 }
1139                 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1140                 for (i = 0; i < 16; i++)
1141                         printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1142                 printk(KERN_INFO "]\n");
1143                 tmf_task.tmf =  TMF_QUERY_TASK;
1144                 tmf_task.tag_of_task_to_be_managed = tag;
1145
1146                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1147                 switch (rc) {
1148                 /* The task is still in Lun, release it then */
1149                 case TMF_RESP_FUNC_SUCC:
1150                         PM8001_EH_DBG(pm8001_ha,
1151                                 pm8001_printk("The task is still in Lun\n"));
1152                         break;
1153                 /* The task is not in Lun or failed, reset the phy */
1154                 case TMF_RESP_FUNC_FAILED:
1155                 case TMF_RESP_FUNC_COMPLETE:
1156                         PM8001_EH_DBG(pm8001_ha,
1157                         pm8001_printk("The task is not in Lun or failed,"
1158                         " reset the phy\n"));
1159                         break;
1160                 }
1161         }
1162         pm8001_printk(":rc= %d\n", rc);
1163         return rc;
1164 }
1165
1166 /*  mandatory SAM-3, still need free task/ccb info, abord the specified task */
1167 int pm8001_abort_task(struct sas_task *task)
1168 {
1169         unsigned long flags;
1170         u32 tag;
1171         u32 device_id;
1172         struct domain_device *dev ;
1173         struct pm8001_hba_info *pm8001_ha;
1174         struct scsi_lun lun;
1175         struct pm8001_device *pm8001_dev;
1176         struct pm8001_tmf_task tmf_task;
1177         int rc = TMF_RESP_FUNC_FAILED, ret;
1178         u32 phy_id;
1179         struct sas_task_slow slow_task;
1180         if (unlikely(!task || !task->lldd_task || !task->dev))
1181                 return TMF_RESP_FUNC_FAILED;
1182         dev = task->dev;
1183         pm8001_dev = dev->lldd_dev;
1184         pm8001_ha = pm8001_find_ha_by_dev(dev);
1185         device_id = pm8001_dev->device_id;
1186         phy_id = pm8001_dev->attached_phy;
1187         ret = pm8001_find_tag(task, &tag);
1188         if (ret == 0) {
1189                 pm8001_printk("no tag for task:%p\n", task);
1190                 return TMF_RESP_FUNC_FAILED;
1191         }
1192         spin_lock_irqsave(&task->task_state_lock, flags);
1193         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1194                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1195                 return TMF_RESP_FUNC_COMPLETE;
1196         }
1197         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1198         if (task->slow_task == NULL) {
1199                 init_completion(&slow_task.completion);
1200                 task->slow_task = &slow_task;
1201         }
1202         spin_unlock_irqrestore(&task->task_state_lock, flags);
1203         if (task->task_proto & SAS_PROTOCOL_SSP) {
1204                 struct scsi_cmnd *cmnd = task->uldd_task;
1205                 int_to_scsilun(cmnd->device->lun, &lun);
1206                 tmf_task.tmf = TMF_ABORT_TASK;
1207                 tmf_task.tag_of_task_to_be_managed = tag;
1208                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1209                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1210                         pm8001_dev->sas_device, 0, tag);
1211         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1212                 task->task_proto & SAS_PROTOCOL_STP) {
1213                 if (pm8001_ha->chip_id == chip_8006) {
1214                         DECLARE_COMPLETION_ONSTACK(completion_reset);
1215                         DECLARE_COMPLETION_ONSTACK(completion);
1216                         struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1217
1218                         /* 1. Set Device state as Recovery */
1219                         pm8001_dev->setds_completion = &completion;
1220                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1221                                 pm8001_dev, 0x03);
1222                         wait_for_completion(&completion);
1223
1224                         /* 2. Send Phy Control Hard Reset */
1225                         reinit_completion(&completion);
1226                         phy->port_reset_status = PORT_RESET_TMO;
1227                         phy->reset_success = false;
1228                         phy->enable_completion = &completion;
1229                         phy->reset_completion = &completion_reset;
1230                         ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1231                                 PHY_HARD_RESET);
1232                         if (ret) {
1233                                 phy->enable_completion = NULL;
1234                                 phy->reset_completion = NULL;
1235                                 goto out;
1236                         }
1237
1238                         /* In the case of the reset timeout/fail we still
1239                          * abort the command at the firmware. The assumption
1240                          * here is that the drive is off doing something so
1241                          * that it's not processing requests, and we want to
1242                          * avoid getting a completion for this and either
1243                          * leaking the task in libsas or losing the race and
1244                          * getting a double free.
1245                          */
1246                         PM8001_MSG_DBG(pm8001_ha,
1247                                 pm8001_printk("Waiting for local phy ctl\n"));
1248                         ret = wait_for_completion_timeout(&completion,
1249                                         PM8001_TASK_TIMEOUT * HZ);
1250                         if (!ret || !phy->reset_success) {
1251                                 phy->enable_completion = NULL;
1252                                 phy->reset_completion = NULL;
1253                         } else {
1254                                 /* 3. Wait for Port Reset complete or
1255                                  * Port reset TMO
1256                                  */
1257                                 PM8001_MSG_DBG(pm8001_ha,
1258                                 pm8001_printk("Waiting for Port reset\n"));
1259                                 ret = wait_for_completion_timeout(
1260                                         &completion_reset,
1261                                         PM8001_TASK_TIMEOUT * HZ);
1262                                 if (!ret)
1263                                         phy->reset_completion = NULL;
1264                                 WARN_ON(phy->port_reset_status ==
1265                                                 PORT_RESET_TMO);
1266                                 if (phy->port_reset_status == PORT_RESET_TMO) {
1267                                         pm8001_dev_gone_notify(dev);
1268                                         goto out;
1269                                 }
1270                         }
1271
1272                         /*
1273                          * 4. SATA Abort ALL
1274                          * we wait for the task to be aborted so that the task
1275                          * is removed from the ccb. on success the caller is
1276                          * going to free the task.
1277                          */
1278                         ret = pm8001_exec_internal_task_abort(pm8001_ha,
1279                                 pm8001_dev, pm8001_dev->sas_device, 1, tag);
1280                         if (ret)
1281                                 goto out;
1282                         ret = wait_for_completion_timeout(
1283                                 &task->slow_task->completion,
1284                                 PM8001_TASK_TIMEOUT * HZ);
1285                         if (!ret)
1286                                 goto out;
1287
1288                         /* 5. Set Device State as Operational */
1289                         reinit_completion(&completion);
1290                         pm8001_dev->setds_completion = &completion;
1291                         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1292                                 pm8001_dev, 0x01);
1293                         wait_for_completion(&completion);
1294                 } else {
1295                         rc = pm8001_exec_internal_task_abort(pm8001_ha,
1296                                 pm8001_dev, pm8001_dev->sas_device, 0, tag);
1297                 }
1298                 rc = TMF_RESP_FUNC_COMPLETE;
1299         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1300                 /* SMP */
1301                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1302                         pm8001_dev->sas_device, 0, tag);
1303
1304         }
1305 out:
1306         spin_lock_irqsave(&task->task_state_lock, flags);
1307         if (task->slow_task == &slow_task)
1308                 task->slow_task = NULL;
1309         spin_unlock_irqrestore(&task->task_state_lock, flags);
1310         if (rc != TMF_RESP_FUNC_COMPLETE)
1311                 pm8001_printk("rc= %d\n", rc);
1312         return rc;
1313 }
1314
1315 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1316 {
1317         int rc = TMF_RESP_FUNC_FAILED;
1318         struct pm8001_tmf_task tmf_task;
1319
1320         tmf_task.tmf = TMF_ABORT_TASK_SET;
1321         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1322         return rc;
1323 }
1324
1325 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1326 {
1327         int rc = TMF_RESP_FUNC_FAILED;
1328         struct pm8001_tmf_task tmf_task;
1329
1330         tmf_task.tmf = TMF_CLEAR_ACA;
1331         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1332
1333         return rc;
1334 }
1335
1336 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1337 {
1338         int rc = TMF_RESP_FUNC_FAILED;
1339         struct pm8001_tmf_task tmf_task;
1340         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1341         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1342
1343         PM8001_EH_DBG(pm8001_ha,
1344                 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1345                 pm8001_dev->device_id));
1346         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1347         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1348         return rc;
1349 }
1350