linux/drivers/scsi/pm8001/pm8001_sas.c
<<
>>
Prefs
   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 */
  49static 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  */
  65void 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  */
  76inline 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
  94void 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  */
 109int 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  */
 137static
 138struct 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  */
 154int 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  */
 241void 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
 254int 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  */
 272static 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
 278u32 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                        *tag = qc->tag;
 285                        return 1;
 286                }
 287        }
 288        return 0;
 289}
 290
 291/**
 292  * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 293  * @pm8001_ha: our hba card information
 294  * @ccb: the ccb which attached to sata task
 295  */
 296static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 297        struct pm8001_ccb_info *ccb)
 298{
 299        return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 300}
 301
 302/**
 303  * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 304  * @pm8001_ha: our hba card information
 305  * @ccb: the ccb which attached to TM
 306  * @tmf: the task management IU
 307  */
 308static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 309        struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 310{
 311        return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 312}
 313
 314/**
 315  * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 316  * @pm8001_ha: our hba card information
 317  * @ccb: the ccb which attached to ssp task
 318  */
 319static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 320        struct pm8001_ccb_info *ccb)
 321{
 322        return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 323}
 324
 325 /* Find the local port id that's attached to this device */
 326static int sas_find_local_port_id(struct domain_device *dev)
 327{
 328        struct domain_device *pdev = dev->parent;
 329
 330        /* Directly attached device */
 331        if (!pdev)
 332                return dev->port->id;
 333        while (pdev) {
 334                struct domain_device *pdev_p = pdev->parent;
 335                if (!pdev_p)
 336                        return pdev->port->id;
 337                pdev = pdev->parent;
 338        }
 339        return 0;
 340}
 341
 342/**
 343  * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 344  * @task: the task to be execute.
 345  * @num: if can_queue great than 1, the task can be queued up. for SMP task,
 346  * we always execute one one time.
 347  * @gfp_flags: gfp_flags.
 348  * @is_tmf: if it is task management task.
 349  * @tmf: the task management IU
 350  */
 351#define DEV_IS_GONE(pm8001_dev) \
 352        ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 353static int pm8001_task_exec(struct sas_task *task,
 354        gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 355{
 356        struct domain_device *dev = task->dev;
 357        struct pm8001_hba_info *pm8001_ha;
 358        struct pm8001_device *pm8001_dev;
 359        struct pm8001_port *port = NULL;
 360        struct sas_task *t = task;
 361        struct pm8001_ccb_info *ccb;
 362        u32 tag = 0xdeadbeef, rc, n_elem = 0;
 363        unsigned long flags = 0;
 364
 365        if (!dev->port) {
 366                struct task_status_struct *tsm = &t->task_status;
 367                tsm->resp = SAS_TASK_UNDELIVERED;
 368                tsm->stat = SAS_PHY_DOWN;
 369                if (dev->dev_type != SAS_SATA_DEV)
 370                        t->task_done(t);
 371                return 0;
 372        }
 373        pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 374        PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
 375        spin_lock_irqsave(&pm8001_ha->lock, flags);
 376        do {
 377                dev = t->dev;
 378                pm8001_dev = dev->lldd_dev;
 379                port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 380                if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 381                        if (sas_protocol_ata(t->task_proto)) {
 382                                struct task_status_struct *ts = &t->task_status;
 383                                ts->resp = SAS_TASK_UNDELIVERED;
 384                                ts->stat = SAS_PHY_DOWN;
 385
 386                                spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 387                                t->task_done(t);
 388                                spin_lock_irqsave(&pm8001_ha->lock, flags);
 389                                continue;
 390                        } else {
 391                                struct task_status_struct *ts = &t->task_status;
 392                                ts->resp = SAS_TASK_UNDELIVERED;
 393                                ts->stat = SAS_PHY_DOWN;
 394                                t->task_done(t);
 395                                continue;
 396                        }
 397                }
 398                rc = pm8001_tag_alloc(pm8001_ha, &tag);
 399                if (rc)
 400                        goto err_out;
 401                ccb = &pm8001_ha->ccb_info[tag];
 402
 403                if (!sas_protocol_ata(t->task_proto)) {
 404                        if (t->num_scatter) {
 405                                n_elem = dma_map_sg(pm8001_ha->dev,
 406                                        t->scatter,
 407                                        t->num_scatter,
 408                                        t->data_dir);
 409                                if (!n_elem) {
 410                                        rc = -ENOMEM;
 411                                        goto err_out_tag;
 412                                }
 413                        }
 414                } else {
 415                        n_elem = t->num_scatter;
 416                }
 417
 418                t->lldd_task = ccb;
 419                ccb->n_elem = n_elem;
 420                ccb->ccb_tag = tag;
 421                ccb->task = t;
 422                ccb->device = pm8001_dev;
 423                switch (t->task_proto) {
 424                case SAS_PROTOCOL_SMP:
 425                        rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 426                        break;
 427                case SAS_PROTOCOL_SSP:
 428                        if (is_tmf)
 429                                rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 430                                        ccb, tmf);
 431                        else
 432                                rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 433                        break;
 434                case SAS_PROTOCOL_SATA:
 435                case SAS_PROTOCOL_STP:
 436                        rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 437                        break;
 438                default:
 439                        dev_printk(KERN_ERR, pm8001_ha->dev,
 440                                "unknown sas_task proto: 0x%x\n",
 441                                t->task_proto);
 442                        rc = -EINVAL;
 443                        break;
 444                }
 445
 446                if (rc) {
 447                        PM8001_IO_DBG(pm8001_ha,
 448                                pm8001_printk("rc is %x\n", rc));
 449                        goto err_out_tag;
 450                }
 451                /* TODO: select normal or high priority */
 452                spin_lock(&t->task_state_lock);
 453                t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 454                spin_unlock(&t->task_state_lock);
 455                pm8001_dev->running_req++;
 456        } while (0);
 457        rc = 0;
 458        goto out_done;
 459
 460err_out_tag:
 461        pm8001_tag_free(pm8001_ha, tag);
 462err_out:
 463        dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 464        if (!sas_protocol_ata(t->task_proto))
 465                if (n_elem)
 466                        dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem,
 467                                t->data_dir);
 468out_done:
 469        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 470        return rc;
 471}
 472
 473/**
 474  * pm8001_queue_command - register for upper layer used, all IO commands sent
 475  * to HBA are from this interface.
 476  * @task: the task to be execute.
 477  * @gfp_flags: gfp_flags
 478  */
 479int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 480{
 481        return pm8001_task_exec(task, gfp_flags, 0, NULL);
 482}
 483
 484/**
 485  * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 486  * @pm8001_ha: our hba card information
 487  * @ccb: the ccb which attached to ssp task
 488  * @task: the task to be free.
 489  * @ccb_idx: ccb index.
 490  */
 491void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 492        struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 493{
 494        if (!ccb->task)
 495                return;
 496        if (!sas_protocol_ata(task->task_proto))
 497                if (ccb->n_elem)
 498                        dma_unmap_sg(pm8001_ha->dev, task->scatter,
 499                                task->num_scatter, task->data_dir);
 500
 501        switch (task->task_proto) {
 502        case SAS_PROTOCOL_SMP:
 503                dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 504                        PCI_DMA_FROMDEVICE);
 505                dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 506                        PCI_DMA_TODEVICE);
 507                break;
 508
 509        case SAS_PROTOCOL_SATA:
 510        case SAS_PROTOCOL_STP:
 511        case SAS_PROTOCOL_SSP:
 512        default:
 513                /* do nothing */
 514                break;
 515        }
 516        task->lldd_task = NULL;
 517        ccb->task = NULL;
 518        ccb->ccb_tag = 0xFFFFFFFF;
 519        ccb->open_retry = 0;
 520        pm8001_tag_free(pm8001_ha, ccb_idx);
 521}
 522
 523 /**
 524  * pm8001_alloc_dev - find a empty pm8001_device
 525  * @pm8001_ha: our hba card information
 526  */
 527struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 528{
 529        u32 dev;
 530        for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 531                if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 532                        pm8001_ha->devices[dev].id = dev;
 533                        return &pm8001_ha->devices[dev];
 534                }
 535        }
 536        if (dev == PM8001_MAX_DEVICES) {
 537                PM8001_FAIL_DBG(pm8001_ha,
 538                        pm8001_printk("max support %d devices, ignore ..\n",
 539                        PM8001_MAX_DEVICES));
 540        }
 541        return NULL;
 542}
 543/**
 544  * pm8001_find_dev - find a matching pm8001_device
 545  * @pm8001_ha: our hba card information
 546  */
 547struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 548                                        u32 device_id)
 549{
 550        u32 dev;
 551        for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 552                if (pm8001_ha->devices[dev].device_id == device_id)
 553                        return &pm8001_ha->devices[dev];
 554        }
 555        if (dev == PM8001_MAX_DEVICES) {
 556                PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
 557                                "DEVICE FOUND !!!\n"));
 558        }
 559        return NULL;
 560}
 561
 562static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 563{
 564        u32 id = pm8001_dev->id;
 565        memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 566        pm8001_dev->id = id;
 567        pm8001_dev->dev_type = SAS_PHY_UNUSED;
 568        pm8001_dev->device_id = PM8001_MAX_DEVICES;
 569        pm8001_dev->sas_device = NULL;
 570}
 571
 572/**
 573  * pm8001_dev_found_notify - libsas notify a device is found.
 574  * @dev: the device structure which sas layer used.
 575  *
 576  * when libsas find a sas domain device, it should tell the LLDD that
 577  * device is found, and then LLDD register this device to HBA firmware
 578  * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 579  * device ID(according to device's sas address) and returned it to LLDD. From
 580  * now on, we communicate with HBA FW with the device ID which HBA assigned
 581  * rather than sas address. it is the necessary step for our HBA but it is
 582  * the optional for other HBA driver.
 583  */
 584static int pm8001_dev_found_notify(struct domain_device *dev)
 585{
 586        unsigned long flags = 0;
 587        int res = 0;
 588        struct pm8001_hba_info *pm8001_ha = NULL;
 589        struct domain_device *parent_dev = dev->parent;
 590        struct pm8001_device *pm8001_device;
 591        DECLARE_COMPLETION_ONSTACK(completion);
 592        u32 flag = 0;
 593        pm8001_ha = pm8001_find_ha_by_dev(dev);
 594        spin_lock_irqsave(&pm8001_ha->lock, flags);
 595
 596        pm8001_device = pm8001_alloc_dev(pm8001_ha);
 597        if (!pm8001_device) {
 598                res = -1;
 599                goto found_out;
 600        }
 601        pm8001_device->sas_device = dev;
 602        dev->lldd_dev = pm8001_device;
 603        pm8001_device->dev_type = dev->dev_type;
 604        pm8001_device->dcompletion = &completion;
 605        if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 606                int phy_id;
 607                struct ex_phy *phy;
 608                for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 609                phy_id++) {
 610                        phy = &parent_dev->ex_dev.ex_phy[phy_id];
 611                        if (SAS_ADDR(phy->attached_sas_addr)
 612                                == SAS_ADDR(dev->sas_addr)) {
 613                                pm8001_device->attached_phy = phy_id;
 614                                break;
 615                        }
 616                }
 617                if (phy_id == parent_dev->ex_dev.num_phys) {
 618                        PM8001_FAIL_DBG(pm8001_ha,
 619                        pm8001_printk("Error: no attached dev:%016llx"
 620                        " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
 621                                SAS_ADDR(parent_dev->sas_addr)));
 622                        res = -1;
 623                }
 624        } else {
 625                if (dev->dev_type == SAS_SATA_DEV) {
 626                        pm8001_device->attached_phy =
 627                                dev->rphy->identify.phy_identifier;
 628                                flag = 1; /* directly sata*/
 629                }
 630        } /*register this device to HBA*/
 631        PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
 632        PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 633        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 634        wait_for_completion(&completion);
 635        if (dev->dev_type == SAS_END_DEVICE)
 636                msleep(50);
 637        pm8001_ha->flags = PM8001F_RUN_TIME;
 638        return 0;
 639found_out:
 640        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 641        return res;
 642}
 643
 644int pm8001_dev_found(struct domain_device *dev)
 645{
 646        return pm8001_dev_found_notify(dev);
 647}
 648
 649void pm8001_task_done(struct sas_task *task)
 650{
 651        if (!del_timer(&task->slow_task->timer))
 652                return;
 653        complete(&task->slow_task->completion);
 654}
 655
 656static void pm8001_tmf_timedout(unsigned long data)
 657{
 658        struct sas_task *task = (struct sas_task *)data;
 659
 660        task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 661        complete(&task->slow_task->completion);
 662}
 663
 664#define PM8001_TASK_TIMEOUT 20
 665/**
 666  * pm8001_exec_internal_tmf_task - execute some task management commands.
 667  * @dev: the wanted device.
 668  * @tmf: which task management wanted to be take.
 669  * @para_len: para_len.
 670  * @parameter: ssp task parameter.
 671  *
 672  * when errors or exception happened, we may want to do something, for example
 673  * abort the issued task which result in this execption, it is done by calling
 674  * this function, note it is also with the task execute interface.
 675  */
 676static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 677        void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 678{
 679        int res, retry;
 680        struct sas_task *task = NULL;
 681        struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 682        struct pm8001_device *pm8001_dev = dev->lldd_dev;
 683        DECLARE_COMPLETION_ONSTACK(completion_setstate);
 684
 685        for (retry = 0; retry < 3; retry++) {
 686                task = sas_alloc_slow_task(GFP_KERNEL);
 687                if (!task)
 688                        return -ENOMEM;
 689
 690                task->dev = dev;
 691                task->task_proto = dev->tproto;
 692                memcpy(&task->ssp_task, parameter, para_len);
 693                task->task_done = pm8001_task_done;
 694                task->slow_task->timer.data = (unsigned long)task;
 695                task->slow_task->timer.function = pm8001_tmf_timedout;
 696                task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 697                add_timer(&task->slow_task->timer);
 698
 699                res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 700
 701                if (res) {
 702                        del_timer(&task->slow_task->timer);
 703                        PM8001_FAIL_DBG(pm8001_ha,
 704                                pm8001_printk("Executing internal task "
 705                                "failed\n"));
 706                        goto ex_err;
 707                }
 708                wait_for_completion(&task->slow_task->completion);
 709                if (pm8001_ha->chip_id != chip_8001) {
 710                        pm8001_dev->setds_completion = &completion_setstate;
 711                                PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 712                                        pm8001_dev, 0x01);
 713                        wait_for_completion(&completion_setstate);
 714                }
 715                res = -TMF_RESP_FUNC_FAILED;
 716                /* Even TMF timed out, return direct. */
 717                if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 718                        if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 719                                PM8001_FAIL_DBG(pm8001_ha,
 720                                        pm8001_printk("TMF task[%x]timeout.\n",
 721                                        tmf->tmf));
 722                                goto ex_err;
 723                        }
 724                }
 725
 726                if (task->task_status.resp == SAS_TASK_COMPLETE &&
 727                        task->task_status.stat == SAM_STAT_GOOD) {
 728                        res = TMF_RESP_FUNC_COMPLETE;
 729                        break;
 730                }
 731
 732                if (task->task_status.resp == SAS_TASK_COMPLETE &&
 733                task->task_status.stat == SAS_DATA_UNDERRUN) {
 734                        /* no error, but return the number of bytes of
 735                        * underrun */
 736                        res = task->task_status.residual;
 737                        break;
 738                }
 739
 740                if (task->task_status.resp == SAS_TASK_COMPLETE &&
 741                        task->task_status.stat == SAS_DATA_OVERRUN) {
 742                        PM8001_FAIL_DBG(pm8001_ha,
 743                                pm8001_printk("Blocked task error.\n"));
 744                        res = -EMSGSIZE;
 745                        break;
 746                } else {
 747                        PM8001_EH_DBG(pm8001_ha,
 748                                pm8001_printk(" Task to dev %016llx response:"
 749                                "0x%x status 0x%x\n",
 750                                SAS_ADDR(dev->sas_addr),
 751                                task->task_status.resp,
 752                                task->task_status.stat));
 753                        sas_free_task(task);
 754                        task = NULL;
 755                }
 756        }
 757ex_err:
 758        BUG_ON(retry == 3 && task != NULL);
 759        sas_free_task(task);
 760        return res;
 761}
 762
 763static int
 764pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 765        struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 766        u32 task_tag)
 767{
 768        int res, retry;
 769        u32 ccb_tag;
 770        struct pm8001_ccb_info *ccb;
 771        struct sas_task *task = NULL;
 772
 773        for (retry = 0; retry < 3; retry++) {
 774                task = sas_alloc_slow_task(GFP_KERNEL);
 775                if (!task)
 776                        return -ENOMEM;
 777
 778                task->dev = dev;
 779                task->task_proto = dev->tproto;
 780                task->task_done = pm8001_task_done;
 781                task->slow_task->timer.data = (unsigned long)task;
 782                task->slow_task->timer.function = pm8001_tmf_timedout;
 783                task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 784                add_timer(&task->slow_task->timer);
 785
 786                res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 787                if (res)
 788                        return res;
 789                ccb = &pm8001_ha->ccb_info[ccb_tag];
 790                ccb->device = pm8001_dev;
 791                ccb->ccb_tag = ccb_tag;
 792                ccb->task = task;
 793                ccb->n_elem = 0;
 794
 795                res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 796                        pm8001_dev, flag, task_tag, ccb_tag);
 797
 798                if (res) {
 799                        del_timer(&task->slow_task->timer);
 800                        PM8001_FAIL_DBG(pm8001_ha,
 801                                pm8001_printk("Executing internal task "
 802                                "failed\n"));
 803                        goto ex_err;
 804                }
 805                wait_for_completion(&task->slow_task->completion);
 806                res = TMF_RESP_FUNC_FAILED;
 807                /* Even TMF timed out, return direct. */
 808                if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 809                        if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 810                                PM8001_FAIL_DBG(pm8001_ha,
 811                                        pm8001_printk("TMF task timeout.\n"));
 812                                goto ex_err;
 813                        }
 814                }
 815
 816                if (task->task_status.resp == SAS_TASK_COMPLETE &&
 817                        task->task_status.stat == SAM_STAT_GOOD) {
 818                        res = TMF_RESP_FUNC_COMPLETE;
 819                        break;
 820
 821                } else {
 822                        PM8001_EH_DBG(pm8001_ha,
 823                                pm8001_printk(" Task to dev %016llx response: "
 824                                        "0x%x status 0x%x\n",
 825                                SAS_ADDR(dev->sas_addr),
 826                                task->task_status.resp,
 827                                task->task_status.stat));
 828                        sas_free_task(task);
 829                        task = NULL;
 830                }
 831        }
 832ex_err:
 833        BUG_ON(retry == 3 && task != NULL);
 834        sas_free_task(task);
 835        return res;
 836}
 837
 838/**
 839  * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 840  * @dev: the device structure which sas layer used.
 841  */
 842static void pm8001_dev_gone_notify(struct domain_device *dev)
 843{
 844        unsigned long flags = 0;
 845        struct pm8001_hba_info *pm8001_ha;
 846        struct pm8001_device *pm8001_dev = dev->lldd_dev;
 847
 848        pm8001_ha = pm8001_find_ha_by_dev(dev);
 849        spin_lock_irqsave(&pm8001_ha->lock, flags);
 850        if (pm8001_dev) {
 851                u32 device_id = pm8001_dev->device_id;
 852
 853                PM8001_DISC_DBG(pm8001_ha,
 854                        pm8001_printk("found dev[%d:%x] is gone.\n",
 855                        pm8001_dev->device_id, pm8001_dev->dev_type));
 856                if (pm8001_dev->running_req) {
 857                        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 858                        pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 859                                dev, 1, 0);
 860                        spin_lock_irqsave(&pm8001_ha->lock, flags);
 861                }
 862                PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 863                pm8001_free_dev(pm8001_dev);
 864        } else {
 865                PM8001_DISC_DBG(pm8001_ha,
 866                        pm8001_printk("Found dev has gone.\n"));
 867        }
 868        dev->lldd_dev = NULL;
 869        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 870}
 871
 872void pm8001_dev_gone(struct domain_device *dev)
 873{
 874        pm8001_dev_gone_notify(dev);
 875}
 876
 877static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 878        u8 *lun, struct pm8001_tmf_task *tmf)
 879{
 880        struct sas_ssp_task ssp_task;
 881        if (!(dev->tproto & SAS_PROTOCOL_SSP))
 882                return TMF_RESP_FUNC_ESUPP;
 883
 884        strncpy((u8 *)&ssp_task.LUN, lun, 8);
 885        return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 886                tmf);
 887}
 888
 889/* retry commands by ha, by task and/or by device */
 890void pm8001_open_reject_retry(
 891        struct pm8001_hba_info *pm8001_ha,
 892        struct sas_task *task_to_close,
 893        struct pm8001_device *device_to_close)
 894{
 895        int i;
 896        unsigned long flags;
 897
 898        if (pm8001_ha == NULL)
 899                return;
 900
 901        spin_lock_irqsave(&pm8001_ha->lock, flags);
 902
 903        for (i = 0; i < PM8001_MAX_CCB; i++) {
 904                struct sas_task *task;
 905                struct task_status_struct *ts;
 906                struct pm8001_device *pm8001_dev;
 907                unsigned long flags1;
 908                u32 tag;
 909                struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 910
 911                pm8001_dev = ccb->device;
 912                if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 913                        continue;
 914                if (!device_to_close) {
 915                        uintptr_t d = (uintptr_t)pm8001_dev
 916                                        - (uintptr_t)&pm8001_ha->devices;
 917                        if (((d % sizeof(*pm8001_dev)) != 0)
 918                         || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 919                                continue;
 920                } else if (pm8001_dev != device_to_close)
 921                        continue;
 922                tag = ccb->ccb_tag;
 923                if (!tag || (tag == 0xFFFFFFFF))
 924                        continue;
 925                task = ccb->task;
 926                if (!task || !task->task_done)
 927                        continue;
 928                if (task_to_close && (task != task_to_close))
 929                        continue;
 930                ts = &task->task_status;
 931                ts->resp = SAS_TASK_COMPLETE;
 932                /* Force the midlayer to retry */
 933                ts->stat = SAS_OPEN_REJECT;
 934                ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 935                if (pm8001_dev)
 936                        pm8001_dev->running_req--;
 937                spin_lock_irqsave(&task->task_state_lock, flags1);
 938                task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 939                task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 940                task->task_state_flags |= SAS_TASK_STATE_DONE;
 941                if (unlikely((task->task_state_flags
 942                                & SAS_TASK_STATE_ABORTED))) {
 943                        spin_unlock_irqrestore(&task->task_state_lock,
 944                                flags1);
 945                        pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 946                } else {
 947                        spin_unlock_irqrestore(&task->task_state_lock,
 948                                flags1);
 949                        pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 950                        mb();/* in order to force CPU ordering */
 951                        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 952                        task->task_done(task);
 953                        spin_lock_irqsave(&pm8001_ha->lock, flags);
 954                }
 955        }
 956
 957        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 958}
 959
 960/**
 961  * Standard mandates link reset for ATA  (type 0) and hard reset for
 962  * SSP (type 1) , only for RECOVERY
 963  */
 964int pm8001_I_T_nexus_reset(struct domain_device *dev)
 965{
 966        int rc = TMF_RESP_FUNC_FAILED;
 967        struct pm8001_device *pm8001_dev;
 968        struct pm8001_hba_info *pm8001_ha;
 969        struct sas_phy *phy;
 970
 971        if (!dev || !dev->lldd_dev)
 972                return -ENODEV;
 973
 974        pm8001_dev = dev->lldd_dev;
 975        pm8001_ha = pm8001_find_ha_by_dev(dev);
 976        phy = sas_get_local_phy(dev);
 977
 978        if (dev_is_sata(dev)) {
 979                if (scsi_is_sas_phy_local(phy)) {
 980                        rc = 0;
 981                        goto out;
 982                }
 983                rc = sas_phy_reset(phy, 1);
 984                if (rc) {
 985                        PM8001_EH_DBG(pm8001_ha,
 986                        pm8001_printk("phy reset failed for device %x\n"
 987                        "with rc %d\n", pm8001_dev->device_id, rc));
 988                        rc = TMF_RESP_FUNC_FAILED;
 989                        goto out;
 990                }
 991                msleep(2000);
 992                rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
 993                        dev, 1, 0);
 994                if (rc) {
 995                        PM8001_EH_DBG(pm8001_ha,
 996                        pm8001_printk("task abort failed %x\n"
 997                        "with rc %d\n", pm8001_dev->device_id, rc));
 998                        rc = TMF_RESP_FUNC_FAILED;
 999                }
1000        } else {
1001                rc = sas_phy_reset(phy, 1);
1002                msleep(2000);
1003        }
1004        PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1005                pm8001_dev->device_id, rc));
1006 out:
1007        sas_put_local_phy(phy);
1008        return rc;
1009}
1010
1011/*
1012* This function handle the IT_NEXUS_XXX event or completion
1013* status code for SSP/SATA/SMP I/O request.
1014*/
1015int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1016{
1017        int rc = TMF_RESP_FUNC_FAILED;
1018        struct pm8001_device *pm8001_dev;
1019        struct pm8001_hba_info *pm8001_ha;
1020        struct sas_phy *phy;
1021        u32 device_id = 0;
1022
1023        if (!dev || !dev->lldd_dev)
1024                return -1;
1025
1026        pm8001_dev = dev->lldd_dev;
1027        device_id = pm8001_dev->device_id;
1028        pm8001_ha = pm8001_find_ha_by_dev(dev);
1029
1030        PM8001_EH_DBG(pm8001_ha,
1031                        pm8001_printk("I_T_Nexus handler invoked !!"));
1032
1033        phy = sas_get_local_phy(dev);
1034
1035        if (dev_is_sata(dev)) {
1036                DECLARE_COMPLETION_ONSTACK(completion_setstate);
1037                if (scsi_is_sas_phy_local(phy)) {
1038                        rc = 0;
1039                        goto out;
1040                }
1041                /* send internal ssp/sata/smp abort command to FW */
1042                rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1043                                                        dev, 1, 0);
1044                msleep(100);
1045
1046                /* deregister the target device */
1047                pm8001_dev_gone_notify(dev);
1048                msleep(200);
1049
1050                /*send phy reset to hard reset target */
1051                rc = sas_phy_reset(phy, 1);
1052                msleep(2000);
1053                pm8001_dev->setds_completion = &completion_setstate;
1054
1055                wait_for_completion(&completion_setstate);
1056        } else {
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        }
1070        PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1071                pm8001_dev->device_id, rc));
1072out:
1073        sas_put_local_phy(phy);
1074
1075        return rc;
1076}
1077/* mandatory SAM-3, the task reset the specified LUN*/
1078int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1079{
1080        int rc = TMF_RESP_FUNC_FAILED;
1081        struct pm8001_tmf_task tmf_task;
1082        struct pm8001_device *pm8001_dev = dev->lldd_dev;
1083        struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1084        DECLARE_COMPLETION_ONSTACK(completion_setstate);
1085        if (dev_is_sata(dev)) {
1086                struct sas_phy *phy = sas_get_local_phy(dev);
1087                rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1088                        dev, 1, 0);
1089                rc = sas_phy_reset(phy, 1);
1090                sas_put_local_phy(phy);
1091                pm8001_dev->setds_completion = &completion_setstate;
1092                rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1093                        pm8001_dev, 0x01);
1094                wait_for_completion(&completion_setstate);
1095        } else {
1096                tmf_task.tmf = TMF_LU_RESET;
1097                rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1098        }
1099        /* If failed, fall-through I_T_Nexus reset */
1100        PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1101                pm8001_dev->device_id, rc));
1102        return rc;
1103}
1104
1105/* optional SAM-3 */
1106int pm8001_query_task(struct sas_task *task)
1107{
1108        u32 tag = 0xdeadbeef;
1109        int i = 0;
1110        struct scsi_lun lun;
1111        struct pm8001_tmf_task tmf_task;
1112        int rc = TMF_RESP_FUNC_FAILED;
1113        if (unlikely(!task || !task->lldd_task || !task->dev))
1114                return rc;
1115
1116        if (task->task_proto & SAS_PROTOCOL_SSP) {
1117                struct scsi_cmnd *cmnd = task->uldd_task;
1118                struct domain_device *dev = task->dev;
1119                struct pm8001_hba_info *pm8001_ha =
1120                        pm8001_find_ha_by_dev(dev);
1121
1122                int_to_scsilun(cmnd->device->lun, &lun);
1123                rc = pm8001_find_tag(task, &tag);
1124                if (rc == 0) {
1125                        rc = TMF_RESP_FUNC_FAILED;
1126                        return rc;
1127                }
1128                PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1129                for (i = 0; i < 16; i++)
1130                        printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1131                printk(KERN_INFO "]\n");
1132                tmf_task.tmf =  TMF_QUERY_TASK;
1133                tmf_task.tag_of_task_to_be_managed = tag;
1134
1135                rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1136                switch (rc) {
1137                /* The task is still in Lun, release it then */
1138                case TMF_RESP_FUNC_SUCC:
1139                        PM8001_EH_DBG(pm8001_ha,
1140                                pm8001_printk("The task is still in Lun\n"));
1141                        break;
1142                /* The task is not in Lun or failed, reset the phy */
1143                case TMF_RESP_FUNC_FAILED:
1144                case TMF_RESP_FUNC_COMPLETE:
1145                        PM8001_EH_DBG(pm8001_ha,
1146                        pm8001_printk("The task is not in Lun or failed,"
1147                        " reset the phy\n"));
1148                        break;
1149                }
1150        }
1151        pm8001_printk(":rc= %d\n", rc);
1152        return rc;
1153}
1154
1155/*  mandatory SAM-3, still need free task/ccb info, abord the specified task */
1156int pm8001_abort_task(struct sas_task *task)
1157{
1158        unsigned long flags;
1159        u32 tag = 0xdeadbeef;
1160        u32 device_id;
1161        struct domain_device *dev ;
1162        struct pm8001_hba_info *pm8001_ha = NULL;
1163        struct pm8001_ccb_info *ccb;
1164        struct scsi_lun lun;
1165        struct pm8001_device *pm8001_dev;
1166        struct pm8001_tmf_task tmf_task;
1167        int rc = TMF_RESP_FUNC_FAILED;
1168        if (unlikely(!task || !task->lldd_task || !task->dev))
1169                return rc;
1170        spin_lock_irqsave(&task->task_state_lock, flags);
1171        if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1172                spin_unlock_irqrestore(&task->task_state_lock, flags);
1173                rc = TMF_RESP_FUNC_COMPLETE;
1174                goto out;
1175        }
1176        spin_unlock_irqrestore(&task->task_state_lock, flags);
1177        if (task->task_proto & SAS_PROTOCOL_SSP) {
1178                struct scsi_cmnd *cmnd = task->uldd_task;
1179                dev = task->dev;
1180                ccb = task->lldd_task;
1181                pm8001_dev = dev->lldd_dev;
1182                pm8001_ha = pm8001_find_ha_by_dev(dev);
1183                int_to_scsilun(cmnd->device->lun, &lun);
1184                rc = pm8001_find_tag(task, &tag);
1185                if (rc == 0) {
1186                        printk(KERN_INFO "No such tag in %s\n", __func__);
1187                        rc = TMF_RESP_FUNC_FAILED;
1188                        return rc;
1189                }
1190                device_id = pm8001_dev->device_id;
1191                PM8001_EH_DBG(pm8001_ha,
1192                        pm8001_printk("abort io to deviceid= %d\n", device_id));
1193                tmf_task.tmf = TMF_ABORT_TASK;
1194                tmf_task.tag_of_task_to_be_managed = tag;
1195                rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1196                pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1197                        pm8001_dev->sas_device, 0, tag);
1198        } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1199                task->task_proto & SAS_PROTOCOL_STP) {
1200                dev = task->dev;
1201                pm8001_dev = dev->lldd_dev;
1202                pm8001_ha = pm8001_find_ha_by_dev(dev);
1203                rc = pm8001_find_tag(task, &tag);
1204                if (rc == 0) {
1205                        printk(KERN_INFO "No such tag in %s\n", __func__);
1206                        rc = TMF_RESP_FUNC_FAILED;
1207                        return rc;
1208                }
1209                rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1210                        pm8001_dev->sas_device, 0, tag);
1211        } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1212                /* SMP */
1213                dev = task->dev;
1214                pm8001_dev = dev->lldd_dev;
1215                pm8001_ha = pm8001_find_ha_by_dev(dev);
1216                rc = pm8001_find_tag(task, &tag);
1217                if (rc == 0) {
1218                        printk(KERN_INFO "No such tag in %s\n", __func__);
1219                        rc = TMF_RESP_FUNC_FAILED;
1220                        return rc;
1221                }
1222                rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1223                        pm8001_dev->sas_device, 0, tag);
1224
1225        }
1226out:
1227        if (rc != TMF_RESP_FUNC_COMPLETE)
1228                pm8001_printk("rc= %d\n", rc);
1229        return rc;
1230}
1231
1232int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1233{
1234        int rc = TMF_RESP_FUNC_FAILED;
1235        struct pm8001_tmf_task tmf_task;
1236
1237        tmf_task.tmf = TMF_ABORT_TASK_SET;
1238        rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1239        return rc;
1240}
1241
1242int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1243{
1244        int rc = TMF_RESP_FUNC_FAILED;
1245        struct pm8001_tmf_task tmf_task;
1246
1247        tmf_task.tmf = TMF_CLEAR_ACA;
1248        rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1249
1250        return rc;
1251}
1252
1253int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1254{
1255        int rc = TMF_RESP_FUNC_FAILED;
1256        struct pm8001_tmf_task tmf_task;
1257        struct pm8001_device *pm8001_dev = dev->lldd_dev;
1258        struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1259
1260        PM8001_EH_DBG(pm8001_ha,
1261                pm8001_printk("I_T_L_Q clear task set[%x]\n",
1262                pm8001_dev->device_id));
1263        tmf_task.tmf = TMF_CLEAR_TASK_SET;
1264        rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1265        return rc;
1266}
1267
1268