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_clear - clear the tags bitmap
  62   * @pm8001_ha: our hba struct
  63   * @tag: the found tag associated with the task
  64   */
  65 static void pm8001_tag_clear(struct pm8001_hba_info *pm8001_ha, u32 tag)
  66 {
  67         void *bitmap = pm8001_ha->tags;
  68         clear_bit(tag, bitmap);
  69 }
  70
  71 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
  72 {
  73         pm8001_tag_clear(pm8001_ha, tag);
  74 }
  75
  76 static void pm8001_tag_set(struct pm8001_hba_info *pm8001_ha, u32 tag)
  77 {
  78         void *bitmap = pm8001_ha->tags;
  79         set_bit(tag, bitmap);
  80 }
  81
  82 /**
  83   * pm8001_tag_alloc - allocate a empty tag for task used.
  84   * @pm8001_ha: our hba struct
  85   * @tag_out: the found empty tag .
  86   */
  87 inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
  88 {
  89         unsigned int index, tag;
  90         void *bitmap = pm8001_ha->tags;
  91
  92         index = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
  93         tag = index;
  94         if (tag >= pm8001_ha->tags_num)
  95                 return -SAS_QUEUE_FULL;
  96         pm8001_tag_set(pm8001_ha, tag);
  97         *tag_out = tag;
  98         return 0;
  99 }
 100
 101 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
 102 {
 103         int i;
 104         for (i = 0; i < pm8001_ha->tags_num; ++i)
 105                 pm8001_tag_clear(pm8001_ha, i);
 106 }
 107
 108  /**
 109   * pm8001_mem_alloc - allocate memory for pm8001.
 110   * @pdev: pci device.
 111   * @virt_addr: the allocated virtual address
 112   * @pphys_addr_hi: the physical address high byte address.
 113   * @pphys_addr_lo: the physical address low byte address.
 114   * @mem_size: memory size.
 115   */
 116 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
 117         dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
 118         u32 *pphys_addr_lo, u32 mem_size, u32 align)
 119 {
 120         caddr_t mem_virt_alloc;
 121         dma_addr_t mem_dma_handle;
 122         u64 phys_align;
 123         u64 align_offset = 0;
 124         if (align)
 125                 align_offset = (dma_addr_t)align - 1;
 126         mem_virt_alloc =
 127                 pci_alloc_consistent(pdev, mem_size + align, &mem_dma_handle);
 128         if (!mem_virt_alloc) {
 129                 pm8001_printk("memory allocation error\n");
 130                 return -1;
 131         }
 132         memset((void *)mem_virt_alloc, 0, mem_size+align);
 133         *pphys_addr = mem_dma_handle;
 134         phys_align = (*pphys_addr + align_offset) & ~align_offset;
 135         *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
 136         *pphys_addr_hi = upper_32_bits(phys_align);
 137         *pphys_addr_lo = lower_32_bits(phys_align);
 138         return 0;
 139 }
 140 /**
 141   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 142   * find out our hba struct.
 143   * @dev: the domain device which from sas layer.
 144   */
 145 static
 146 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 147 {
 148         struct sas_ha_struct *sha = dev->port->ha;
 149         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 150         return pm8001_ha;
 151 }
 152
 153 /**
 154   * pm8001_phy_control - this function should be registered to
 155   * sas_domain_function_template to provide libsas used, note: this is just
 156   * control the HBA phy rather than other expander phy if you want control
 157   * other phy, you should use SMP command.
 158   * @sas_phy: which phy in HBA phys.
 159   * @func: the operation.
 160   * @funcdata: always NULL.
 161   */
 162 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 163         void *funcdata)
 164 {
 165         int rc = 0, phy_id = sas_phy->id;
 166         struct pm8001_hba_info *pm8001_ha = NULL;
 167         struct sas_phy_linkrates *rates;
 168         DECLARE_COMPLETION_ONSTACK(completion);
 169         unsigned long flags;
 170         pm8001_ha = sas_phy->ha->lldd_ha;
 171         pm8001_ha->phy[phy_id].enable_completion = &completion;
 172         switch (func) {
 173         case PHY_FUNC_SET_LINK_RATE:
 174                 rates = funcdata;
 175                 if (rates->minimum_linkrate) {
 176                         pm8001_ha->phy[phy_id].minimum_linkrate =
 177                                 rates->minimum_linkrate;
 178                 }
 179                 if (rates->maximum_linkrate) {
 180                         pm8001_ha->phy[phy_id].maximum_linkrate =
 181                                 rates->maximum_linkrate;
 182                 }
 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_LINK_RESET);
 189                 break;
 190         case PHY_FUNC_HARD_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_HARD_RESET);
 197                 break;
 198         case PHY_FUNC_LINK_RESET:
 199                 if (pm8001_ha->phy[phy_id].phy_state == 0) {
 200                         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 201                         wait_for_completion(&completion);
 202                 }
 203                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 204                                               PHY_LINK_RESET);
 205                 break;
 206         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 207                 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 208                                               PHY_LINK_RESET);
 209                 break;
 210         case PHY_FUNC_DISABLE:
 211                 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 212                 break;
 213         case PHY_FUNC_GET_EVENTS:
 214                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 215                 if (pm8001_ha->chip_id == chip_8001) {
 216                         if (-1 == pm8001_bar4_shift(pm8001_ha,
 217                                         (phy_id < 4) ? 0x30000 : 0x40000)) {
 218                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 219                                 return -EINVAL;
 220                         }
 221                 }
 222                 {
 223                         struct sas_phy *phy = sas_phy->phy;
 224                         uint32_t *qp = (uint32_t *)(((char *)
 225                                 pm8001_ha->io_mem[2].memvirtaddr)
 226                                 + 0x1034 + (0x4000 * (phy_id & 3)));
 227
 228                         phy->invalid_dword_count = qp[0];
 229                         phy->running_disparity_error_count = qp[1];
 230                         phy->loss_of_dword_sync_count = qp[3];
 231                         phy->phy_reset_problem_count = qp[4];
 232                 }
 233                 if (pm8001_ha->chip_id == chip_8001)
 234                         pm8001_bar4_shift(pm8001_ha, 0);
 235                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 236                 return 0;
 237         default:
 238                 rc = -EOPNOTSUPP;
 239         }
 240         msleep(300);
 241         return rc;
 242 }
 243
 244 /**
 245   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 246   * command to HBA.
 247   * @shost: the scsi host data.
 248   */
 249 void pm8001_scan_start(struct Scsi_Host *shost)
 250 {
 251         int i;
 252         struct pm8001_hba_info *pm8001_ha;
 253         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 254         pm8001_ha = sha->lldd_ha;
 255         /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 256         if (pm8001_ha->chip_id == chip_8001)
 257                 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 258         for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
 259                 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 260 }
 261
 262 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 263 {
 264         struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 265
 266         /* give the phy enabling interrupt event time to come in (1s
 267         * is empirically about all it takes) */
 268         if (time < HZ)
 269                 return 0;
 270         /* Wait for discovery to finish */
 271         sas_drain_work(ha);
 272         return 1;
 273 }
 274
 275 /**
 276   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 277   * @pm8001_ha: our hba card information
 278   * @ccb: the ccb which attached to smp task
 279   */
 280 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 281         struct pm8001_ccb_info *ccb)
 282 {
 283         return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 284 }
 285
 286 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 287 {
 288         struct ata_queued_cmd *qc = task->uldd_task;
 289         if (qc) {
 290                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 291                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 292                         *tag = qc->tag;
 293                         return 1;
 294                 }
 295         }
 296         return 0;
 297 }
 298
 299 /**
 300   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 301   * @pm8001_ha: our hba card information
 302   * @ccb: the ccb which attached to sata task
 303   */
 304 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 305         struct pm8001_ccb_info *ccb)
 306 {
 307         return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 308 }
 309
 310 /**
 311   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 312   * @pm8001_ha: our hba card information
 313   * @ccb: the ccb which attached to TM
 314   * @tmf: the task management IU
 315   */
 316 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 317         struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 318 {
 319         return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 320 }
 321
 322 /**
 323   * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 324   * @pm8001_ha: our hba card information
 325   * @ccb: the ccb which attached to ssp task
 326   */
 327 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 328         struct pm8001_ccb_info *ccb)
 329 {
 330         return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 331 }
 332
 333  /* Find the local port id that's attached to this device */
 334 static int sas_find_local_port_id(struct domain_device *dev)
 335 {
 336         struct domain_device *pdev = dev->parent;
 337
 338         /* Directly attached device */
 339         if (!pdev)
 340                 return dev->port->id;
 341         while (pdev) {
 342                 struct domain_device *pdev_p = pdev->parent;
 343                 if (!pdev_p)
 344                         return pdev->port->id;
 345                 pdev = pdev->parent;
 346         }
 347         return 0;
 348 }
 349
 350 /**
 351   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 352   * @task: the task to be execute.
 353   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 354   * we always execute one one time.
 355   * @gfp_flags: gfp_flags.
 356   * @is_tmf: if it is task management task.
 357   * @tmf: the task management IU
 358   */
 359 #define DEV_IS_GONE(pm8001_dev) \
 360         ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 361 static int pm8001_task_exec(struct sas_task *task, const int num,
 362         gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 363 {
 364         struct domain_device *dev = task->dev;
 365         struct pm8001_hba_info *pm8001_ha;
 366         struct pm8001_device *pm8001_dev;
 367         struct pm8001_port *port = NULL;
 368         struct sas_task *t = task;
 369         struct pm8001_ccb_info *ccb;
 370         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 371         u32 n = num;
 372         unsigned long flags = 0;
 373
 374         if (!dev->port) {
 375                 struct task_status_struct *tsm = &t->task_status;
 376                 tsm->resp = SAS_TASK_UNDELIVERED;
 377                 tsm->stat = SAS_PHY_DOWN;
 378                 if (dev->dev_type != SAS_SATA_DEV)
 379                         t->task_done(t);
 380                 return 0;
 381         }
 382         pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 383         PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 384         spin_lock_irqsave(&pm8001_ha->lock, flags);
 385         do {
 386                 dev = t->dev;
 387                 pm8001_dev = dev->lldd_dev;
 388                 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 389                 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 390                         if (sas_protocol_ata(t->task_proto)) {
 391                                 struct task_status_struct *ts = &t->task_status;
 392                                 ts->resp = SAS_TASK_UNDELIVERED;
 393                                 ts->stat = SAS_PHY_DOWN;
 394
 395                                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 396                                 t->task_done(t);
 397                                 spin_lock_irqsave(&pm8001_ha->lock, flags);
 398                                 if (n > 1)
 399                                         t = list_entry(t->list.next,
 400                                                         struct sas_task, list);
 401                                 continue;
 402                         } else {
 403                                 struct task_status_struct *ts = &t->task_status;
 404                                 ts->resp = SAS_TASK_UNDELIVERED;
 405                                 ts->stat = SAS_PHY_DOWN;
 406                                 t->task_done(t);
 407                                 if (n > 1)
 408                                         t = list_entry(t->list.next,
 409                                                         struct sas_task, list);
 410                                 continue;
 411                         }
 412                 }
 413                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
 414                 if (rc)
 415                         goto err_out;
 416                 ccb = &pm8001_ha->ccb_info[tag];
 417
 418                 if (!sas_protocol_ata(t->task_proto)) {
 419                         if (t->num_scatter) {
 420                                 n_elem = dma_map_sg(pm8001_ha->dev,
 421                                         t->scatter,
 422                                         t->num_scatter,
 423                                         t->data_dir);
 424                                 if (!n_elem) {
 425                                         rc = -ENOMEM;
 426                                         goto err_out_tag;
 427                                 }
 428                         }
 429                 } else {
 430                         n_elem = t->num_scatter;
 431                 }
 432
 433                 t->lldd_task = ccb;
 434                 ccb->n_elem = n_elem;
 435                 ccb->ccb_tag = tag;
 436                 ccb->task = t;
 437                 ccb->device = pm8001_dev;
 438                 switch (t->task_proto) {
 439                 case SAS_PROTOCOL_SMP:
 440                         rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 441                         break;
 442                 case SAS_PROTOCOL_SSP:
 443                         if (is_tmf)
 444                                 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 445                                         ccb, tmf);
 446                         else
 447                                 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 448                         break;
 449                 case SAS_PROTOCOL_SATA:
 450                 case SAS_PROTOCOL_STP:
 451                         rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 452                         break;
 453                 default:
 454                         dev_printk(KERN_ERR, pm8001_ha->dev,
 455                                 "unknown sas_task proto: 0x%x\n",
 456                                 t->task_proto);
 457                         rc = -EINVAL;
 458                         break;
 459                 }
 460
 461                 if (rc) {
 462                         PM8001_IO_DBG(pm8001_ha,
 463                                 pm8001_printk("rc is %x\n", rc));
 464                         goto err_out_tag;
 465                 }
 466                 /* TODO: select normal or high priority */
 467                 spin_lock(&t->task_state_lock);
 468                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 469                 spin_unlock(&t->task_state_lock);
 470                 pm8001_dev->running_req++;
 471                 if (n > 1)
 472                         t = list_entry(t->list.next, struct sas_task, list);
 473         } while (--n);
 474         rc = 0;
 475         goto out_done;
 476
 477 err_out_tag:
 478         pm8001_tag_free(pm8001_ha, tag);
 479 err_out:
 480         dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 481         if (!sas_protocol_ata(t->task_proto))
 482                 if (n_elem)
 483                         dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem,
 484                                 t->data_dir);
 485 out_done:
 486         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 487         return rc;
 488 }
 489
 490 /**
 491   * pm8001_queue_command - register for upper layer used, all IO commands sent
 492   * to HBA are from this interface.
 493   * @task: the task to be execute.
 494   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 495   * we always execute one one time
 496   * @gfp_flags: gfp_flags
 497   */
 498 int pm8001_queue_command(struct sas_task *task, const int num,
 499                 gfp_t gfp_flags)
 500 {
 501         return pm8001_task_exec(task, num, gfp_flags, 0, NULL);
 502 }
 503
 504 void pm8001_ccb_free(struct pm8001_hba_info *pm8001_ha, u32 ccb_idx)
 505 {
 506         pm8001_tag_clear(pm8001_ha, ccb_idx);
 507 }
 508
 509 /**
 510   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 511   * @pm8001_ha: our hba card information
 512   * @ccb: the ccb which attached to ssp task
 513   * @task: the task to be free.
 514   * @ccb_idx: ccb index.
 515   */
 516 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 517         struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 518 {
 519         if (!ccb->task)
 520                 return;
 521         if (!sas_protocol_ata(task->task_proto))
 522                 if (ccb->n_elem)
 523                         dma_unmap_sg(pm8001_ha->dev, task->scatter,
 524                                 task->num_scatter, task->data_dir);
 525
 526         switch (task->task_proto) {
 527         case SAS_PROTOCOL_SMP:
 528                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 529                         PCI_DMA_FROMDEVICE);
 530                 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 531                         PCI_DMA_TODEVICE);
 532                 break;
 533
 534         case SAS_PROTOCOL_SATA:
 535         case SAS_PROTOCOL_STP:
 536         case SAS_PROTOCOL_SSP:
 537         default:
 538                 /* do nothing */
 539                 break;
 540         }
 541         task->lldd_task = NULL;
 542         ccb->task = NULL;
 543         ccb->ccb_tag = 0xFFFFFFFF;
 544         ccb->open_retry = 0;
 545         pm8001_ccb_free(pm8001_ha, ccb_idx);
 546 }
 547
 548  /**
 549   * pm8001_alloc_dev - find a empty pm8001_device
 550   * @pm8001_ha: our hba card information
 551   */
 552 struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 553 {
 554         u32 dev;
 555         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 556                 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 557                         pm8001_ha->devices[dev].id = dev;
 558                         return &pm8001_ha->devices[dev];
 559                 }
 560         }
 561         if (dev == PM8001_MAX_DEVICES) {
 562                 PM8001_FAIL_DBG(pm8001_ha,
 563                         pm8001_printk("max support %d devices, ignore ..\n",
 564                         PM8001_MAX_DEVICES));
 565         }
 566         return NULL;
 567 }
 568 /**
 569   * pm8001_find_dev - find a matching pm8001_device
 570   * @pm8001_ha: our hba card information
 571   */
 572 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 573                                         u32 device_id)
 574 {
 575         u32 dev;
 576         for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 577                 if (pm8001_ha->devices[dev].device_id == device_id)
 578                         return &pm8001_ha->devices[dev];
 579         }
 580         if (dev == PM8001_MAX_DEVICES) {
 581                 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 582                                 "DEVICE FOUND !!!\n"));
 583         }
 584         return NULL;
 585 }
 586
 587 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 588 {
 589         u32 id = pm8001_dev->id;
 590         memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 591         pm8001_dev->id = id;
 592         pm8001_dev->dev_type = SAS_PHY_UNUSED;
 593         pm8001_dev->device_id = PM8001_MAX_DEVICES;
 594         pm8001_dev->sas_device = NULL;
 595 }
 596
 597 /**
 598   * pm8001_dev_found_notify - libsas notify a device is found.
 599   * @dev: the device structure which sas layer used.
 600   *
 601   * when libsas find a sas domain device, it should tell the LLDD that
 602   * device is found, and then LLDD register this device to HBA firmware
 603   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 604   * device ID(according to device's sas address) and returned it to LLDD. From
 605   * now on, we communicate with HBA FW with the device ID which HBA assigned
 606   * rather than sas address. it is the necessary step for our HBA but it is
 607   * the optional for other HBA driver.
 608   */
 609 static int pm8001_dev_found_notify(struct domain_device *dev)
 610 {
 611         unsigned long flags = 0;
 612         int res = 0;
 613         struct pm8001_hba_info *pm8001_ha = NULL;
 614         struct domain_device *parent_dev = dev->parent;
 615         struct pm8001_device *pm8001_device;
 616         DECLARE_COMPLETION_ONSTACK(completion);
 617         u32 flag = 0;
 618         pm8001_ha = pm8001_find_ha_by_dev(dev);
 619         spin_lock_irqsave(&pm8001_ha->lock, flags);
 620
 621         pm8001_device = pm8001_alloc_dev(pm8001_ha);
 622         if (!pm8001_device) {
 623                 res = -1;
 624                 goto found_out;
 625         }
 626         pm8001_device->sas_device = dev;
 627         dev->lldd_dev = pm8001_device;
 628         pm8001_device->dev_type = dev->dev_type;
 629         pm8001_device->dcompletion = &completion;
 630         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 631                 int phy_id;
 632                 struct ex_phy *phy;
 633                 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 634                 phy_id++) {
 635                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
 636                         if (SAS_ADDR(phy->attached_sas_addr)
 637                                 == SAS_ADDR(dev->sas_addr)) {
 638                                 pm8001_device->attached_phy = phy_id;
 639                                 break;
 640                         }
 641                 }
 642                 if (phy_id == parent_dev->ex_dev.num_phys) {
 643                         PM8001_FAIL_DBG(pm8001_ha,
 644                         pm8001_printk("Error: no attached dev:%016llx"
 645                         " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 646                                 SAS_ADDR(parent_dev->sas_addr)));
 647                         res = -1;
 648                 }
 649         } else {
 650                 if (dev->dev_type == SAS_SATA_DEV) {
 651                         pm8001_device->attached_phy =
 652                                 dev->rphy->identify.phy_identifier;
 653                                 flag = 1; /* directly sata*/
 654                 }
 655         } /*register this device to HBA*/
 656         PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 657         PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 658         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 659         wait_for_completion(&completion);
 660         if (dev->dev_type == SAS_END_DEVICE)
 661                 msleep(50);
 662         pm8001_ha->flags = PM8001F_RUN_TIME;
 663         return 0;
 664 found_out:
 665         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 666         return res;
 667 }
 668
 669 int pm8001_dev_found(struct domain_device *dev)
 670 {
 671         return pm8001_dev_found_notify(dev);
 672 }
 673
 674 void pm8001_task_done(struct sas_task *task)
 675 {
 676         if (!del_timer(&task->slow_task->timer))
 677                 return;
 678         complete(&task->slow_task->completion);
 679 }
 680
 681 static void pm8001_tmf_timedout(unsigned long data)
 682 {
 683         struct sas_task *task = (struct sas_task *)data;
 684
 685         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 686         complete(&task->slow_task->completion);
 687 }
 688
 689 #define PM8001_TASK_TIMEOUT 20
 690 /**
 691   * pm8001_exec_internal_tmf_task - execute some task management commands.
 692   * @dev: the wanted device.
 693   * @tmf: which task management wanted to be take.
 694   * @para_len: para_len.
 695   * @parameter: ssp task parameter.
 696   *
 697   * when errors or exception happened, we may want to do something, for example
 698   * abort the issued task which result in this execption, it is done by calling
 699   * this function, note it is also with the task execute interface.
 700   */
 701 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 702         void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 703 {
 704         int res, retry;
 705         struct sas_task *task = NULL;
 706         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 707         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 708         DECLARE_COMPLETION_ONSTACK(completion_setstate);
 709
 710         for (retry = 0; retry < 3; retry++) {
 711                 task = sas_alloc_slow_task(GFP_KERNEL);
 712                 if (!task)
 713                         return -ENOMEM;
 714
 715                 task->dev = dev;
 716                 task->task_proto = dev->tproto;
 717                 memcpy(&task->ssp_task, parameter, para_len);
 718                 task->task_done = pm8001_task_done;
 719                 task->slow_task->timer.data = (unsigned long)task;
 720                 task->slow_task->timer.function = pm8001_tmf_timedout;
 721                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 722                 add_timer(&task->slow_task->timer);
 723
 724                 res = pm8001_task_exec(task, 1, GFP_KERNEL, 1, tmf);
 725
 726                 if (res) {
 727                         del_timer(&task->slow_task->timer);
 728                         PM8001_FAIL_DBG(pm8001_ha,
 729                                 pm8001_printk("Executing internal task "
 730                                 "failed\n"));
 731                         goto ex_err;
 732                 }
 733                 wait_for_completion(&task->slow_task->completion);
 734                 if (pm8001_ha->chip_id != chip_8001) {
 735                         pm8001_dev->setds_completion = &completion_setstate;
 736                                 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 737                                         pm8001_dev, 0x01);
 738                         wait_for_completion(&completion_setstate);
 739                 }
 740                 res = -TMF_RESP_FUNC_FAILED;
 741                 /* Even TMF timed out, return direct. */
 742                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 743                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 744                                 PM8001_FAIL_DBG(pm8001_ha,
 745                                         pm8001_printk("TMF task[%x]timeout.\n",
 746                                         tmf->tmf));
 747                                 goto ex_err;
 748                         }
 749                 }
 750
 751                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 752                         task->task_status.stat == SAM_STAT_GOOD) {
 753                         res = TMF_RESP_FUNC_COMPLETE;
 754                         break;
 755                 }
 756
 757                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 758                 task->task_status.stat == SAS_DATA_UNDERRUN) {
 759                         /* no error, but return the number of bytes of
 760                         * underrun */
 761                         res = task->task_status.residual;
 762                         break;
 763                 }
 764
 765                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 766                         task->task_status.stat == SAS_DATA_OVERRUN) {
 767                         PM8001_FAIL_DBG(pm8001_ha,
 768                                 pm8001_printk("Blocked task error.\n"));
 769                         res = -EMSGSIZE;
 770                         break;
 771                 } else {
 772                         PM8001_EH_DBG(pm8001_ha,
 773                                 pm8001_printk(" Task to dev %016llx response:"
 774                                 "0x%x status 0x%x\n",
 775                                 SAS_ADDR(dev->sas_addr),
 776                                 task->task_status.resp,
 777                                 task->task_status.stat));
 778                         sas_free_task(task);
 779                         task = NULL;
 780                 }
 781         }
 782 ex_err:
 783         BUG_ON(retry == 3 && task != NULL);
 784         sas_free_task(task);
 785         return res;
 786 }
 787
 788 static int
 789 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 790         struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 791         u32 task_tag)
 792 {
 793         int res, retry;
 794         u32 ccb_tag;
 795         struct pm8001_ccb_info *ccb;
 796         struct sas_task *task = NULL;
 797
 798         for (retry = 0; retry < 3; retry++) {
 799                 task = sas_alloc_slow_task(GFP_KERNEL);
 800                 if (!task)
 801                         return -ENOMEM;
 802
 803                 task->dev = dev;
 804                 task->task_proto = dev->tproto;
 805                 task->task_done = pm8001_task_done;
 806                 task->slow_task->timer.data = (unsigned long)task;
 807                 task->slow_task->timer.function = pm8001_tmf_timedout;
 808                 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 809                 add_timer(&task->slow_task->timer);
 810
 811                 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 812                 if (res)
 813                         return res;
 814                 ccb = &pm8001_ha->ccb_info[ccb_tag];
 815                 ccb->device = pm8001_dev;
 816                 ccb->ccb_tag = ccb_tag;
 817                 ccb->task = task;
 818
 819                 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 820                         pm8001_dev, flag, task_tag, ccb_tag);
 821
 822                 if (res) {
 823                         del_timer(&task->slow_task->timer);
 824                         PM8001_FAIL_DBG(pm8001_ha,
 825                                 pm8001_printk("Executing internal task "
 826                                 "failed\n"));
 827                         goto ex_err;
 828                 }
 829                 wait_for_completion(&task->slow_task->completion);
 830                 res = TMF_RESP_FUNC_FAILED;
 831                 /* Even TMF timed out, return direct. */
 832                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 833                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 834                                 PM8001_FAIL_DBG(pm8001_ha,
 835                                         pm8001_printk("TMF task timeout.\n"));
 836                                 goto ex_err;
 837                         }
 838                 }
 839
 840                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 841                         task->task_status.stat == SAM_STAT_GOOD) {
 842                         res = TMF_RESP_FUNC_COMPLETE;
 843                         break;
 844
 845                 } else {
 846                         PM8001_EH_DBG(pm8001_ha,
 847                                 pm8001_printk(" Task to dev %016llx response: "
 848                                         "0x%x status 0x%x\n",
 849                                 SAS_ADDR(dev->sas_addr),
 850                                 task->task_status.resp,
 851                                 task->task_status.stat));
 852                         sas_free_task(task);
 853                         task = NULL;
 854                 }
 855         }
 856 ex_err:
 857         BUG_ON(retry == 3 && task != NULL);
 858         sas_free_task(task);
 859         return res;
 860 }
 861
 862 /**
 863   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 864   * @dev: the device structure which sas layer used.
 865   */
 866 static void pm8001_dev_gone_notify(struct domain_device *dev)
 867 {
 868         unsigned long flags = 0;
 869         struct pm8001_hba_info *pm8001_ha;
 870         struct pm8001_device *pm8001_dev = dev->lldd_dev;
 871
 872         pm8001_ha = pm8001_find_ha_by_dev(dev);
 873         spin_lock_irqsave(&pm8001_ha->lock, flags);
 874         if (pm8001_dev) {
 875                 u32 device_id = pm8001_dev->device_id;
 876
 877                 PM8001_DISC_DBG(pm8001_ha,
 878                         pm8001_printk("found dev[%d:%x] is gone.\n",
 879                         pm8001_dev->device_id, pm8001_dev->dev_type));
 880                 if (pm8001_dev->running_req) {
 881                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 882                         pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 883                                 dev, 1, 0);
 884                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 885                 }
 886                 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 887                 pm8001_free_dev(pm8001_dev);
 888         } else {
 889                 PM8001_DISC_DBG(pm8001_ha,
 890                         pm8001_printk("Found dev has gone.\n"));
 891         }
 892         dev->lldd_dev = NULL;
 893         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 894 }
 895
 896 void pm8001_dev_gone(struct domain_device *dev)
 897 {
 898         pm8001_dev_gone_notify(dev);
 899 }
 900
 901 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 902         u8 *lun, struct pm8001_tmf_task *tmf)
 903 {
 904         struct sas_ssp_task ssp_task;
 905         if (!(dev->tproto & SAS_PROTOCOL_SSP))
 906                 return TMF_RESP_FUNC_ESUPP;
 907
 908         strncpy((u8 *)&ssp_task.LUN, lun, 8);
 909         return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 910                 tmf);
 911 }
 912
 913 /* retry commands by ha, by task and/or by device */
 914 void pm8001_open_reject_retry(
 915         struct pm8001_hba_info *pm8001_ha,
 916         struct sas_task *task_to_close,
 917         struct pm8001_device *device_to_close)
 918 {
 919         int i;
 920         unsigned long flags;
 921
 922         if (pm8001_ha == NULL)
 923                 return;
 924
 925         spin_lock_irqsave(&pm8001_ha->lock, flags);
 926
 927         for (i = 0; i < PM8001_MAX_CCB; i++) {
 928                 struct sas_task *task;
 929                 struct task_status_struct *ts;
 930                 struct pm8001_device *pm8001_dev;
 931                 unsigned long flags1;
 932                 u32 tag;
 933                 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 934
 935                 pm8001_dev = ccb->device;
 936                 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 937                         continue;
 938                 if (!device_to_close) {
 939                         uintptr_t d = (uintptr_t)pm8001_dev
 940                                         - (uintptr_t)&pm8001_ha->devices;
 941                         if (((d % sizeof(*pm8001_dev)) != 0)
 942                          || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 943                                 continue;
 944                 } else if (pm8001_dev != device_to_close)
 945                         continue;
 946                 tag = ccb->ccb_tag;
 947                 if (!tag || (tag == 0xFFFFFFFF))
 948                         continue;
 949                 task = ccb->task;
 950                 if (!task || !task->task_done)
 951                         continue;
 952                 if (task_to_close && (task != task_to_close))
 953                         continue;
 954                 ts = &task->task_status;
 955                 ts->resp = SAS_TASK_COMPLETE;
 956                 /* Force the midlayer to retry */
 957                 ts->stat = SAS_OPEN_REJECT;
 958                 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 959                 if (pm8001_dev)
 960                         pm8001_dev->running_req--;
 961                 spin_lock_irqsave(&task->task_state_lock, flags1);
 962                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 963                 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 964                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 965                 if (unlikely((task->task_state_flags
 966                                 & SAS_TASK_STATE_ABORTED))) {
 967                         spin_unlock_irqrestore(&task->task_state_lock,
 968                                 flags1);
 969                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 970                 } else {
 971                         spin_unlock_irqrestore(&task->task_state_lock,
 972                                 flags1);
 973                         pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 974                         mb();/* in order to force CPU ordering */
 975                         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 976                         task->task_done(task);
 977                         spin_lock_irqsave(&pm8001_ha->lock, flags);
 978                 }
 979         }
 980
 981         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 982 }
 983
 984 /**
 985   * Standard mandates link reset for ATA  (type 0) and hard reset for
 986   * SSP (type 1) , only for RECOVERY
 987   */
 988 int pm8001_I_T_nexus_reset(struct domain_device *dev)
 989 {
 990         int rc = TMF_RESP_FUNC_FAILED;
 991         struct pm8001_device *pm8001_dev;
 992         struct pm8001_hba_info *pm8001_ha;
 993         struct sas_phy *phy;
 994
 995         if (!dev || !dev->lldd_dev)
 996                 return -ENODEV;
 997
 998         pm8001_dev = dev->lldd_dev;
 999         pm8001_ha = pm8001_find_ha_by_dev(dev);
1000         phy = sas_get_local_phy(dev);
1001
1002         if (dev_is_sata(dev)) {
1003                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1004                 if (scsi_is_sas_phy_local(phy)) {
1005                         rc = 0;
1006                         goto out;
1007                 }
1008                 rc = sas_phy_reset(phy, 1);
1009                 msleep(2000);
1010                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1011                         dev, 1, 0);
1012                 pm8001_dev->setds_completion = &completion_setstate;
1013                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1014                         pm8001_dev, 0x01);
1015                 wait_for_completion(&completion_setstate);
1016         } else {
1017                 rc = sas_phy_reset(phy, 1);
1018                 msleep(2000);
1019         }
1020         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1021                 pm8001_dev->device_id, rc));
1022  out:
1023         sas_put_local_phy(phy);
1024         return rc;
1025 }
1026
1027 /*
1028 * This function handle the IT_NEXUS_XXX event or completion
1029 * status code for SSP/SATA/SMP I/O request.
1030 */
1031 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1032 {
1033         int rc = TMF_RESP_FUNC_FAILED;
1034         struct pm8001_device *pm8001_dev;
1035         struct pm8001_hba_info *pm8001_ha;
1036         struct sas_phy *phy;
1037         u32 device_id = 0;
1038
1039         if (!dev || !dev->lldd_dev)
1040                 return -1;
1041
1042         pm8001_dev = dev->lldd_dev;
1043         device_id = pm8001_dev->device_id;
1044         pm8001_ha = pm8001_find_ha_by_dev(dev);
1045
1046         PM8001_EH_DBG(pm8001_ha,
1047                         pm8001_printk("I_T_Nexus handler invoked !!"));
1048
1049         phy = sas_get_local_phy(dev);
1050
1051         if (dev_is_sata(dev)) {
1052                 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1053                 if (scsi_is_sas_phy_local(phy)) {
1054                         rc = 0;
1055                         goto out;
1056                 }
1057                 /* send internal ssp/sata/smp abort command to FW */
1058                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1059                                                         dev, 1, 0);
1060                 msleep(100);
1061
1062                 /* deregister the target device */
1063                 pm8001_dev_gone_notify(dev);
1064                 msleep(200);
1065
1066                 /*send phy reset to hard reset target */
1067                 rc = sas_phy_reset(phy, 1);
1068                 msleep(2000);
1069                 pm8001_dev->setds_completion = &completion_setstate;
1070
1071                 wait_for_completion(&completion_setstate);
1072         } else {
1073                 /* send internal ssp/sata/smp abort command to FW */
1074                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1075                                                         dev, 1, 0);
1076                 msleep(100);
1077
1078                 /* deregister the target device */
1079                 pm8001_dev_gone_notify(dev);
1080                 msleep(200);
1081
1082                 /*send phy reset to hard reset target */
1083                 rc = sas_phy_reset(phy, 1);
1084                 msleep(2000);
1085         }
1086         PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1087                 pm8001_dev->device_id, rc));
1088 out:
1089         sas_put_local_phy(phy);
1090
1091         return rc;
1092 }
1093 /* mandatory SAM-3, the task reset the specified LUN*/
1094 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1095 {
1096         int rc = TMF_RESP_FUNC_FAILED;
1097         struct pm8001_tmf_task tmf_task;
1098         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1099         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1100         DECLARE_COMPLETION_ONSTACK(completion_setstate);
1101         if (dev_is_sata(dev)) {
1102                 struct sas_phy *phy = sas_get_local_phy(dev);
1103                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1104                         dev, 1, 0);
1105                 rc = sas_phy_reset(phy, 1);
1106                 sas_put_local_phy(phy);
1107                 pm8001_dev->setds_completion = &completion_setstate;
1108                 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1109                         pm8001_dev, 0x01);
1110                 wait_for_completion(&completion_setstate);
1111         } else {
1112                 tmf_task.tmf = TMF_LU_RESET;
1113                 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1114         }
1115         /* If failed, fall-through I_T_Nexus reset */
1116         PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1117                 pm8001_dev->device_id, rc));
1118         return rc;
1119 }
1120
1121 /* optional SAM-3 */
1122 int pm8001_query_task(struct sas_task *task)
1123 {
1124         u32 tag = 0xdeadbeef;
1125         int i = 0;
1126         struct scsi_lun lun;
1127         struct pm8001_tmf_task tmf_task;
1128         int rc = TMF_RESP_FUNC_FAILED;
1129         if (unlikely(!task || !task->lldd_task || !task->dev))
1130                 return rc;
1131
1132         if (task->task_proto & SAS_PROTOCOL_SSP) {
1133                 struct scsi_cmnd *cmnd = task->uldd_task;
1134                 struct domain_device *dev = task->dev;
1135                 struct pm8001_hba_info *pm8001_ha =
1136                         pm8001_find_ha_by_dev(dev);
1137
1138                 int_to_scsilun(cmnd->device->lun, &lun);
1139                 rc = pm8001_find_tag(task, &tag);
1140                 if (rc == 0) {
1141                         rc = TMF_RESP_FUNC_FAILED;
1142                         return rc;
1143                 }
1144                 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1145                 for (i = 0; i < 16; i++)
1146                         printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1147                 printk(KERN_INFO "]\n");
1148                 tmf_task.tmf =  TMF_QUERY_TASK;
1149                 tmf_task.tag_of_task_to_be_managed = tag;
1150
1151                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1152                 switch (rc) {
1153                 /* The task is still in Lun, release it then */
1154                 case TMF_RESP_FUNC_SUCC:
1155                         PM8001_EH_DBG(pm8001_ha,
1156                                 pm8001_printk("The task is still in Lun\n"));
1157                         break;
1158                 /* The task is not in Lun or failed, reset the phy */
1159                 case TMF_RESP_FUNC_FAILED:
1160                 case TMF_RESP_FUNC_COMPLETE:
1161                         PM8001_EH_DBG(pm8001_ha,
1162                         pm8001_printk("The task is not in Lun or failed,"
1163                         " reset the phy\n"));
1164                         break;
1165                 }
1166         }
1167         pm8001_printk(":rc= %d\n", rc);
1168         return rc;
1169 }
1170
1171 /*  mandatory SAM-3, still need free task/ccb info, abord the specified task */
1172 int pm8001_abort_task(struct sas_task *task)
1173 {
1174         unsigned long flags;
1175         u32 tag = 0xdeadbeef;
1176         u32 device_id;
1177         struct domain_device *dev ;
1178         struct pm8001_hba_info *pm8001_ha = NULL;
1179         struct pm8001_ccb_info *ccb;
1180         struct scsi_lun lun;
1181         struct pm8001_device *pm8001_dev;
1182         struct pm8001_tmf_task tmf_task;
1183         int rc = TMF_RESP_FUNC_FAILED;
1184         if (unlikely(!task || !task->lldd_task || !task->dev))
1185                 return rc;
1186         spin_lock_irqsave(&task->task_state_lock, flags);
1187         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1188                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1189                 rc = TMF_RESP_FUNC_COMPLETE;
1190                 goto out;
1191         }
1192         spin_unlock_irqrestore(&task->task_state_lock, flags);
1193         if (task->task_proto & SAS_PROTOCOL_SSP) {
1194                 struct scsi_cmnd *cmnd = task->uldd_task;
1195                 dev = task->dev;
1196                 ccb = task->lldd_task;
1197                 pm8001_dev = dev->lldd_dev;
1198                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1199                 int_to_scsilun(cmnd->device->lun, &lun);
1200                 rc = pm8001_find_tag(task, &tag);
1201                 if (rc == 0) {
1202                         printk(KERN_INFO "No such tag in %s\n", __func__);
1203                         rc = TMF_RESP_FUNC_FAILED;
1204                         return rc;
1205                 }
1206                 device_id = pm8001_dev->device_id;
1207                 PM8001_EH_DBG(pm8001_ha,
1208                         pm8001_printk("abort io to deviceid= %d\n", device_id));
1209                 tmf_task.tmf = TMF_ABORT_TASK;
1210                 tmf_task.tag_of_task_to_be_managed = tag;
1211                 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1212                 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1213                         pm8001_dev->sas_device, 0, tag);
1214         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1215                 task->task_proto & SAS_PROTOCOL_STP) {
1216                 dev = task->dev;
1217                 pm8001_dev = dev->lldd_dev;
1218                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1219                 rc = pm8001_find_tag(task, &tag);
1220                 if (rc == 0) {
1221                         printk(KERN_INFO "No such tag in %s\n", __func__);
1222                         rc = TMF_RESP_FUNC_FAILED;
1223                         return rc;
1224                 }
1225                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1226                         pm8001_dev->sas_device, 0, tag);
1227         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1228                 /* SMP */
1229                 dev = task->dev;
1230                 pm8001_dev = dev->lldd_dev;
1231                 pm8001_ha = pm8001_find_ha_by_dev(dev);
1232                 rc = pm8001_find_tag(task, &tag);
1233                 if (rc == 0) {
1234                         printk(KERN_INFO "No such tag in %s\n", __func__);
1235                         rc = TMF_RESP_FUNC_FAILED;
1236                         return rc;
1237                 }
1238                 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1239                         pm8001_dev->sas_device, 0, tag);
1240
1241         }
1242 out:
1243         if (rc != TMF_RESP_FUNC_COMPLETE)
1244                 pm8001_printk("rc= %d\n", rc);
1245         return rc;
1246 }
1247
1248 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1249 {
1250         int rc = TMF_RESP_FUNC_FAILED;
1251         struct pm8001_tmf_task tmf_task;
1252
1253         tmf_task.tmf = TMF_ABORT_TASK_SET;
1254         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1255         return rc;
1256 }
1257
1258 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1259 {
1260         int rc = TMF_RESP_FUNC_FAILED;
1261         struct pm8001_tmf_task tmf_task;
1262
1263         tmf_task.tmf = TMF_CLEAR_ACA;
1264         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1265
1266         return rc;
1267 }
1268
1269 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1270 {
1271         int rc = TMF_RESP_FUNC_FAILED;
1272         struct pm8001_tmf_task tmf_task;
1273         struct pm8001_device *pm8001_dev = dev->lldd_dev;
1274         struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1275
1276         PM8001_EH_DBG(pm8001_ha,
1277                 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1278                 pm8001_dev->device_id));
1279         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1280         rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1281         return rc;
1282 }
1283