linux/drivers/scsi/pm8001/pm8001_sas.c
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   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 = dma_alloc_coherent(&pdev->dev, mem_size + align,
 120                                            &mem_dma_handle, GFP_KERNEL);
 121        if (!mem_virt_alloc) {
 122                pr_err("pm80xx: memory allocation error\n");
 123                return -1;
 124        }
 125        *pphys_addr = mem_dma_handle;
 126        phys_align = (*pphys_addr + align_offset) & ~align_offset;
 127        *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
 128        *pphys_addr_hi = upper_32_bits(phys_align);
 129        *pphys_addr_lo = lower_32_bits(phys_align);
 130        return 0;
 131}
 132
 133/**
 134  * pm8001_find_ha_by_dev - from domain device which come from sas layer to
 135  * find out our hba struct.
 136  * @dev: the domain device which from sas layer.
 137  */
 138static
 139struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
 140{
 141        struct sas_ha_struct *sha = dev->port->ha;
 142        struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 143        return pm8001_ha;
 144}
 145
 146/**
 147  * pm8001_phy_control - this function should be registered to
 148  * sas_domain_function_template to provide libsas used, note: this is just
 149  * control the HBA phy rather than other expander phy if you want control
 150  * other phy, you should use SMP command.
 151  * @sas_phy: which phy in HBA phys.
 152  * @func: the operation.
 153  * @funcdata: always NULL.
 154  */
 155int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 156        void *funcdata)
 157{
 158        int rc = 0, phy_id = sas_phy->id;
 159        struct pm8001_hba_info *pm8001_ha = NULL;
 160        struct sas_phy_linkrates *rates;
 161        struct pm8001_phy *phy;
 162        DECLARE_COMPLETION_ONSTACK(completion);
 163        unsigned long flags;
 164        pm8001_ha = sas_phy->ha->lldd_ha;
 165        phy = &pm8001_ha->phy[phy_id];
 166        pm8001_ha->phy[phy_id].enable_completion = &completion;
 167        switch (func) {
 168        case PHY_FUNC_SET_LINK_RATE:
 169                rates = funcdata;
 170                if (rates->minimum_linkrate) {
 171                        pm8001_ha->phy[phy_id].minimum_linkrate =
 172                                rates->minimum_linkrate;
 173                }
 174                if (rates->maximum_linkrate) {
 175                        pm8001_ha->phy[phy_id].maximum_linkrate =
 176                                rates->maximum_linkrate;
 177                }
 178                if (pm8001_ha->phy[phy_id].phy_state ==  PHY_LINK_DISABLE) {
 179                        PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 180                        wait_for_completion(&completion);
 181                }
 182                PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 183                                              PHY_LINK_RESET);
 184                break;
 185        case PHY_FUNC_HARD_RESET:
 186                if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 187                        PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 188                        wait_for_completion(&completion);
 189                }
 190                PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 191                                              PHY_HARD_RESET);
 192                break;
 193        case PHY_FUNC_LINK_RESET:
 194                if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
 195                        PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
 196                        wait_for_completion(&completion);
 197                }
 198                PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 199                                              PHY_LINK_RESET);
 200                break;
 201        case PHY_FUNC_RELEASE_SPINUP_HOLD:
 202                PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
 203                                              PHY_LINK_RESET);
 204                break;
 205        case PHY_FUNC_DISABLE:
 206                if (pm8001_ha->chip_id != chip_8001) {
 207                        if (pm8001_ha->phy[phy_id].phy_state ==
 208                                PHY_STATE_LINK_UP_SPCV) {
 209                                sas_phy_disconnected(&phy->sas_phy);
 210                                sas_notify_phy_event(&phy->sas_phy,
 211                                        PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
 212                                phy->phy_attached = 0;
 213                        }
 214                } else {
 215                        if (pm8001_ha->phy[phy_id].phy_state ==
 216                                PHY_STATE_LINK_UP_SPC) {
 217                                sas_phy_disconnected(&phy->sas_phy);
 218                                sas_notify_phy_event(&phy->sas_phy,
 219                                        PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
 220                                phy->phy_attached = 0;
 221                        }
 222                }
 223                PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
 224                break;
 225        case PHY_FUNC_GET_EVENTS:
 226                spin_lock_irqsave(&pm8001_ha->lock, flags);
 227                if (pm8001_ha->chip_id == chip_8001) {
 228                        if (-1 == pm8001_bar4_shift(pm8001_ha,
 229                                        (phy_id < 4) ? 0x30000 : 0x40000)) {
 230                                spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 231                                return -EINVAL;
 232                        }
 233                }
 234                {
 235                        struct sas_phy *phy = sas_phy->phy;
 236                        uint32_t *qp = (uint32_t *)(((char *)
 237                                pm8001_ha->io_mem[2].memvirtaddr)
 238                                + 0x1034 + (0x4000 * (phy_id & 3)));
 239
 240                        phy->invalid_dword_count = qp[0];
 241                        phy->running_disparity_error_count = qp[1];
 242                        phy->loss_of_dword_sync_count = qp[3];
 243                        phy->phy_reset_problem_count = qp[4];
 244                }
 245                if (pm8001_ha->chip_id == chip_8001)
 246                        pm8001_bar4_shift(pm8001_ha, 0);
 247                spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 248                return 0;
 249        default:
 250                pm8001_dbg(pm8001_ha, DEVIO, "func 0x%x\n", func);
 251                rc = -EOPNOTSUPP;
 252        }
 253        msleep(300);
 254        return rc;
 255}
 256
 257/**
 258  * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
 259  * command to HBA.
 260  * @shost: the scsi host data.
 261  */
 262void pm8001_scan_start(struct Scsi_Host *shost)
 263{
 264        int i;
 265        struct pm8001_hba_info *pm8001_ha;
 266        struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 267        DECLARE_COMPLETION_ONSTACK(completion);
 268        pm8001_ha = sha->lldd_ha;
 269        /* SAS_RE_INITIALIZATION not available in SPCv/ve */
 270        if (pm8001_ha->chip_id == chip_8001)
 271                PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
 272        for (i = 0; i < pm8001_ha->chip->n_phy; ++i) {
 273                pm8001_ha->phy[i].enable_completion = &completion;
 274                PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
 275                wait_for_completion(&completion);
 276                msleep(300);
 277        }
 278}
 279
 280int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
 281{
 282        struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
 283
 284        /* give the phy enabling interrupt event time to come in (1s
 285        * is empirically about all it takes) */
 286        if (time < HZ)
 287                return 0;
 288        /* Wait for discovery to finish */
 289        sas_drain_work(ha);
 290        return 1;
 291}
 292
 293/**
 294  * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
 295  * @pm8001_ha: our hba card information
 296  * @ccb: the ccb which attached to smp task
 297  */
 298static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
 299        struct pm8001_ccb_info *ccb)
 300{
 301        return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
 302}
 303
 304u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
 305{
 306        struct ata_queued_cmd *qc = task->uldd_task;
 307        if (qc) {
 308                if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 309                    qc->tf.command == ATA_CMD_FPDMA_READ ||
 310                    qc->tf.command == ATA_CMD_FPDMA_RECV ||
 311                    qc->tf.command == ATA_CMD_FPDMA_SEND ||
 312                    qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
 313                        *tag = qc->tag;
 314                        return 1;
 315                }
 316        }
 317        return 0;
 318}
 319
 320/**
 321  * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
 322  * @pm8001_ha: our hba card information
 323  * @ccb: the ccb which attached to sata task
 324  */
 325static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
 326        struct pm8001_ccb_info *ccb)
 327{
 328        return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
 329}
 330
 331/**
 332  * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
 333  * @pm8001_ha: our hba card information
 334  * @ccb: the ccb which attached to TM
 335  * @tmf: the task management IU
 336  */
 337static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
 338        struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
 339{
 340        return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
 341}
 342
 343/**
 344  * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
 345  * @pm8001_ha: our hba card information
 346  * @ccb: the ccb which attached to ssp task
 347  */
 348static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
 349        struct pm8001_ccb_info *ccb)
 350{
 351        return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
 352}
 353
 354 /* Find the local port id that's attached to this device */
 355static int sas_find_local_port_id(struct domain_device *dev)
 356{
 357        struct domain_device *pdev = dev->parent;
 358
 359        /* Directly attached device */
 360        if (!pdev)
 361                return dev->port->id;
 362        while (pdev) {
 363                struct domain_device *pdev_p = pdev->parent;
 364                if (!pdev_p)
 365                        return pdev->port->id;
 366                pdev = pdev->parent;
 367        }
 368        return 0;
 369}
 370
 371#define DEV_IS_GONE(pm8001_dev) \
 372        ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
 373/**
 374  * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
 375  * @task: the task to be execute.
 376  * @gfp_flags: gfp_flags.
 377  * @is_tmf: if it is task management task.
 378  * @tmf: the task management IU
 379  */
 380static int pm8001_task_exec(struct sas_task *task,
 381        gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
 382{
 383        struct domain_device *dev = task->dev;
 384        struct pm8001_hba_info *pm8001_ha;
 385        struct pm8001_device *pm8001_dev;
 386        struct pm8001_port *port = NULL;
 387        struct sas_task *t = task;
 388        struct pm8001_ccb_info *ccb;
 389        u32 tag = 0xdeadbeef, rc = 0, n_elem = 0;
 390        unsigned long flags = 0;
 391        enum sas_protocol task_proto = t->task_proto;
 392
 393        if (!dev->port) {
 394                struct task_status_struct *tsm = &t->task_status;
 395                tsm->resp = SAS_TASK_UNDELIVERED;
 396                tsm->stat = SAS_PHY_DOWN;
 397                if (dev->dev_type != SAS_SATA_DEV)
 398                        t->task_done(t);
 399                return 0;
 400        }
 401        pm8001_ha = pm8001_find_ha_by_dev(task->dev);
 402        if (pm8001_ha->controller_fatal_error) {
 403                struct task_status_struct *ts = &t->task_status;
 404
 405                ts->resp = SAS_TASK_UNDELIVERED;
 406                t->task_done(t);
 407                return 0;
 408        }
 409        pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec device\n");
 410        spin_lock_irqsave(&pm8001_ha->lock, flags);
 411        do {
 412                dev = t->dev;
 413                pm8001_dev = dev->lldd_dev;
 414                port = &pm8001_ha->port[sas_find_local_port_id(dev)];
 415                if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
 416                        if (sas_protocol_ata(task_proto)) {
 417                                struct task_status_struct *ts = &t->task_status;
 418                                ts->resp = SAS_TASK_UNDELIVERED;
 419                                ts->stat = SAS_PHY_DOWN;
 420
 421                                spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 422                                t->task_done(t);
 423                                spin_lock_irqsave(&pm8001_ha->lock, flags);
 424                                continue;
 425                        } else {
 426                                struct task_status_struct *ts = &t->task_status;
 427                                ts->resp = SAS_TASK_UNDELIVERED;
 428                                ts->stat = SAS_PHY_DOWN;
 429                                t->task_done(t);
 430                                continue;
 431                        }
 432                }
 433                rc = pm8001_tag_alloc(pm8001_ha, &tag);
 434                if (rc)
 435                        goto err_out;
 436                ccb = &pm8001_ha->ccb_info[tag];
 437
 438                if (!sas_protocol_ata(task_proto)) {
 439                        if (t->num_scatter) {
 440                                n_elem = dma_map_sg(pm8001_ha->dev,
 441                                        t->scatter,
 442                                        t->num_scatter,
 443                                        t->data_dir);
 444                                if (!n_elem) {
 445                                        rc = -ENOMEM;
 446                                        goto err_out_tag;
 447                                }
 448                        }
 449                } else {
 450                        n_elem = t->num_scatter;
 451                }
 452
 453                t->lldd_task = ccb;
 454                ccb->n_elem = n_elem;
 455                ccb->ccb_tag = tag;
 456                ccb->task = t;
 457                ccb->device = pm8001_dev;
 458                switch (task_proto) {
 459                case SAS_PROTOCOL_SMP:
 460                        atomic_inc(&pm8001_dev->running_req);
 461                        rc = pm8001_task_prep_smp(pm8001_ha, ccb);
 462                        break;
 463                case SAS_PROTOCOL_SSP:
 464                        atomic_inc(&pm8001_dev->running_req);
 465                        if (is_tmf)
 466                                rc = pm8001_task_prep_ssp_tm(pm8001_ha,
 467                                        ccb, tmf);
 468                        else
 469                                rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
 470                        break;
 471                case SAS_PROTOCOL_SATA:
 472                case SAS_PROTOCOL_STP:
 473                        atomic_inc(&pm8001_dev->running_req);
 474                        rc = pm8001_task_prep_ata(pm8001_ha, ccb);
 475                        break;
 476                default:
 477                        dev_printk(KERN_ERR, pm8001_ha->dev,
 478                                "unknown sas_task proto: 0x%x\n", task_proto);
 479                        rc = -EINVAL;
 480                        break;
 481                }
 482
 483                if (rc) {
 484                        pm8001_dbg(pm8001_ha, IO, "rc is %x\n", rc);
 485                        atomic_dec(&pm8001_dev->running_req);
 486                        goto err_out_tag;
 487                }
 488                /* TODO: select normal or high priority */
 489                spin_lock(&t->task_state_lock);
 490                t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 491                spin_unlock(&t->task_state_lock);
 492        } while (0);
 493        rc = 0;
 494        goto out_done;
 495
 496err_out_tag:
 497        pm8001_tag_free(pm8001_ha, tag);
 498err_out:
 499        dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
 500        if (!sas_protocol_ata(task_proto))
 501                if (n_elem)
 502                        dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
 503                                t->data_dir);
 504out_done:
 505        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 506        return rc;
 507}
 508
 509/**
 510  * pm8001_queue_command - register for upper layer used, all IO commands sent
 511  * to HBA are from this interface.
 512  * @task: the task to be execute.
 513  * @gfp_flags: gfp_flags
 514  */
 515int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
 516{
 517        return pm8001_task_exec(task, gfp_flags, 0, NULL);
 518}
 519
 520/**
 521  * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
 522  * @pm8001_ha: our hba card information
 523  * @ccb: the ccb which attached to ssp task
 524  * @task: the task to be free.
 525  * @ccb_idx: ccb index.
 526  */
 527void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
 528        struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
 529{
 530        if (!ccb->task)
 531                return;
 532        if (!sas_protocol_ata(task->task_proto))
 533                if (ccb->n_elem)
 534                        dma_unmap_sg(pm8001_ha->dev, task->scatter,
 535                                task->num_scatter, task->data_dir);
 536
 537        switch (task->task_proto) {
 538        case SAS_PROTOCOL_SMP:
 539                dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
 540                        DMA_FROM_DEVICE);
 541                dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
 542                        DMA_TO_DEVICE);
 543                break;
 544
 545        case SAS_PROTOCOL_SATA:
 546        case SAS_PROTOCOL_STP:
 547        case SAS_PROTOCOL_SSP:
 548        default:
 549                /* do nothing */
 550                break;
 551        }
 552        task->lldd_task = NULL;
 553        ccb->task = NULL;
 554        ccb->ccb_tag = 0xFFFFFFFF;
 555        ccb->open_retry = 0;
 556        pm8001_tag_free(pm8001_ha, ccb_idx);
 557}
 558
 559 /**
 560  * pm8001_alloc_dev - find a empty pm8001_device
 561  * @pm8001_ha: our hba card information
 562  */
 563static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
 564{
 565        u32 dev;
 566        for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 567                if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
 568                        pm8001_ha->devices[dev].id = dev;
 569                        return &pm8001_ha->devices[dev];
 570                }
 571        }
 572        if (dev == PM8001_MAX_DEVICES) {
 573                pm8001_dbg(pm8001_ha, FAIL,
 574                           "max support %d devices, ignore ..\n",
 575                           PM8001_MAX_DEVICES);
 576        }
 577        return NULL;
 578}
 579/**
 580  * pm8001_find_dev - find a matching pm8001_device
 581  * @pm8001_ha: our hba card information
 582  * @device_id: device ID to match against
 583  */
 584struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
 585                                        u32 device_id)
 586{
 587        u32 dev;
 588        for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
 589                if (pm8001_ha->devices[dev].device_id == device_id)
 590                        return &pm8001_ha->devices[dev];
 591        }
 592        if (dev == PM8001_MAX_DEVICES) {
 593                pm8001_dbg(pm8001_ha, FAIL, "NO MATCHING DEVICE FOUND !!!\n");
 594        }
 595        return NULL;
 596}
 597
 598void pm8001_free_dev(struct pm8001_device *pm8001_dev)
 599{
 600        u32 id = pm8001_dev->id;
 601        memset(pm8001_dev, 0, sizeof(*pm8001_dev));
 602        pm8001_dev->id = id;
 603        pm8001_dev->dev_type = SAS_PHY_UNUSED;
 604        pm8001_dev->device_id = PM8001_MAX_DEVICES;
 605        pm8001_dev->sas_device = NULL;
 606}
 607
 608/**
 609  * pm8001_dev_found_notify - libsas notify a device is found.
 610  * @dev: the device structure which sas layer used.
 611  *
 612  * when libsas find a sas domain device, it should tell the LLDD that
 613  * device is found, and then LLDD register this device to HBA firmware
 614  * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
 615  * device ID(according to device's sas address) and returned it to LLDD. From
 616  * now on, we communicate with HBA FW with the device ID which HBA assigned
 617  * rather than sas address. it is the necessary step for our HBA but it is
 618  * the optional for other HBA driver.
 619  */
 620static int pm8001_dev_found_notify(struct domain_device *dev)
 621{
 622        unsigned long flags = 0;
 623        int res = 0;
 624        struct pm8001_hba_info *pm8001_ha = NULL;
 625        struct domain_device *parent_dev = dev->parent;
 626        struct pm8001_device *pm8001_device;
 627        DECLARE_COMPLETION_ONSTACK(completion);
 628        u32 flag = 0;
 629        pm8001_ha = pm8001_find_ha_by_dev(dev);
 630        spin_lock_irqsave(&pm8001_ha->lock, flags);
 631
 632        pm8001_device = pm8001_alloc_dev(pm8001_ha);
 633        if (!pm8001_device) {
 634                res = -1;
 635                goto found_out;
 636        }
 637        pm8001_device->sas_device = dev;
 638        dev->lldd_dev = pm8001_device;
 639        pm8001_device->dev_type = dev->dev_type;
 640        pm8001_device->dcompletion = &completion;
 641        if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 642                int phy_id;
 643                struct ex_phy *phy;
 644                for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
 645                phy_id++) {
 646                        phy = &parent_dev->ex_dev.ex_phy[phy_id];
 647                        if (SAS_ADDR(phy->attached_sas_addr)
 648                                == SAS_ADDR(dev->sas_addr)) {
 649                                pm8001_device->attached_phy = phy_id;
 650                                break;
 651                        }
 652                }
 653                if (phy_id == parent_dev->ex_dev.num_phys) {
 654                        pm8001_dbg(pm8001_ha, FAIL,
 655                                   "Error: no attached dev:%016llx at ex:%016llx.\n",
 656                                   SAS_ADDR(dev->sas_addr),
 657                                   SAS_ADDR(parent_dev->sas_addr));
 658                        res = -1;
 659                }
 660        } else {
 661                if (dev->dev_type == SAS_SATA_DEV) {
 662                        pm8001_device->attached_phy =
 663                                dev->rphy->identify.phy_identifier;
 664                        flag = 1; /* directly sata */
 665                }
 666        } /*register this device to HBA*/
 667        pm8001_dbg(pm8001_ha, DISC, "Found device\n");
 668        PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
 669        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 670        wait_for_completion(&completion);
 671        if (dev->dev_type == SAS_END_DEVICE)
 672                msleep(50);
 673        pm8001_ha->flags = PM8001F_RUN_TIME;
 674        return 0;
 675found_out:
 676        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 677        return res;
 678}
 679
 680int pm8001_dev_found(struct domain_device *dev)
 681{
 682        return pm8001_dev_found_notify(dev);
 683}
 684
 685void pm8001_task_done(struct sas_task *task)
 686{
 687        del_timer(&task->slow_task->timer);
 688        complete(&task->slow_task->completion);
 689}
 690
 691static void pm8001_tmf_timedout(struct timer_list *t)
 692{
 693        struct sas_task_slow *slow = from_timer(slow, t, timer);
 694        struct sas_task *task = slow->task;
 695        unsigned long flags;
 696
 697        spin_lock_irqsave(&task->task_state_lock, flags);
 698        if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 699                task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 700                complete(&task->slow_task->completion);
 701        }
 702        spin_unlock_irqrestore(&task->task_state_lock, flags);
 703}
 704
 705#define PM8001_TASK_TIMEOUT 20
 706/**
 707  * pm8001_exec_internal_tmf_task - execute some task management commands.
 708  * @dev: the wanted device.
 709  * @tmf: which task management wanted to be take.
 710  * @para_len: para_len.
 711  * @parameter: ssp task parameter.
 712  *
 713  * when errors or exception happened, we may want to do something, for example
 714  * abort the issued task which result in this execption, it is done by calling
 715  * this function, note it is also with the task execute interface.
 716  */
 717static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 718        void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
 719{
 720        int res, retry;
 721        struct sas_task *task = NULL;
 722        struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 723        struct pm8001_device *pm8001_dev = dev->lldd_dev;
 724        DECLARE_COMPLETION_ONSTACK(completion_setstate);
 725
 726        for (retry = 0; retry < 3; retry++) {
 727                task = sas_alloc_slow_task(GFP_KERNEL);
 728                if (!task)
 729                        return -ENOMEM;
 730
 731                task->dev = dev;
 732                task->task_proto = dev->tproto;
 733                memcpy(&task->ssp_task, parameter, para_len);
 734                task->task_done = pm8001_task_done;
 735                task->slow_task->timer.function = pm8001_tmf_timedout;
 736                task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 737                add_timer(&task->slow_task->timer);
 738
 739                res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
 740
 741                if (res) {
 742                        del_timer(&task->slow_task->timer);
 743                        pm8001_dbg(pm8001_ha, FAIL, "Executing internal task failed\n");
 744                        goto ex_err;
 745                }
 746                wait_for_completion(&task->slow_task->completion);
 747                if (pm8001_ha->chip_id != chip_8001) {
 748                        pm8001_dev->setds_completion = &completion_setstate;
 749                        PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
 750                                pm8001_dev, DS_OPERATIONAL);
 751                        wait_for_completion(&completion_setstate);
 752                }
 753                res = -TMF_RESP_FUNC_FAILED;
 754                /* Even TMF timed out, return direct. */
 755                if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
 756                        pm8001_dbg(pm8001_ha, FAIL, "TMF task[%x]timeout.\n",
 757                                   tmf->tmf);
 758                        goto ex_err;
 759                }
 760
 761                if (task->task_status.resp == SAS_TASK_COMPLETE &&
 762                        task->task_status.stat == SAM_STAT_GOOD) {
 763                        res = TMF_RESP_FUNC_COMPLETE;
 764                        break;
 765                }
 766
 767                if (task->task_status.resp == SAS_TASK_COMPLETE &&
 768                task->task_status.stat == SAS_DATA_UNDERRUN) {
 769                        /* no error, but return the number of bytes of
 770                        * underrun */
 771                        res = task->task_status.residual;
 772                        break;
 773                }
 774
 775                if (task->task_status.resp == SAS_TASK_COMPLETE &&
 776                        task->task_status.stat == SAS_DATA_OVERRUN) {
 777                        pm8001_dbg(pm8001_ha, FAIL, "Blocked task error.\n");
 778                        res = -EMSGSIZE;
 779                        break;
 780                } else {
 781                        pm8001_dbg(pm8001_ha, EH,
 782                                   " Task to dev %016llx response:0x%x status 0x%x\n",
 783                                   SAS_ADDR(dev->sas_addr),
 784                                   task->task_status.resp,
 785                                   task->task_status.stat);
 786                        sas_free_task(task);
 787                        task = NULL;
 788                }
 789        }
 790ex_err:
 791        BUG_ON(retry == 3 && task != NULL);
 792        sas_free_task(task);
 793        return res;
 794}
 795
 796static int
 797pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 798        struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
 799        u32 task_tag)
 800{
 801        int res, retry;
 802        u32 ccb_tag;
 803        struct pm8001_ccb_info *ccb;
 804        struct sas_task *task = NULL;
 805
 806        for (retry = 0; retry < 3; retry++) {
 807                task = sas_alloc_slow_task(GFP_KERNEL);
 808                if (!task)
 809                        return -ENOMEM;
 810
 811                task->dev = dev;
 812                task->task_proto = dev->tproto;
 813                task->task_done = pm8001_task_done;
 814                task->slow_task->timer.function = pm8001_tmf_timedout;
 815                task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 816                add_timer(&task->slow_task->timer);
 817
 818                res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 819                if (res)
 820                        goto ex_err;
 821                ccb = &pm8001_ha->ccb_info[ccb_tag];
 822                ccb->device = pm8001_dev;
 823                ccb->ccb_tag = ccb_tag;
 824                ccb->task = task;
 825                ccb->n_elem = 0;
 826
 827                res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
 828                        pm8001_dev, flag, task_tag, ccb_tag);
 829
 830                if (res) {
 831                        del_timer(&task->slow_task->timer);
 832                        pm8001_dbg(pm8001_ha, FAIL, "Executing internal task failed\n");
 833                        goto ex_err;
 834                }
 835                wait_for_completion(&task->slow_task->completion);
 836                res = TMF_RESP_FUNC_FAILED;
 837                /* Even TMF timed out, return direct. */
 838                if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
 839                        pm8001_dbg(pm8001_ha, FAIL, "TMF task timeout.\n");
 840                        goto ex_err;
 841                }
 842
 843                if (task->task_status.resp == SAS_TASK_COMPLETE &&
 844                        task->task_status.stat == SAM_STAT_GOOD) {
 845                        res = TMF_RESP_FUNC_COMPLETE;
 846                        break;
 847
 848                } else {
 849                        pm8001_dbg(pm8001_ha, EH,
 850                                   " Task to dev %016llx response: 0x%x status 0x%x\n",
 851                                   SAS_ADDR(dev->sas_addr),
 852                                   task->task_status.resp,
 853                                   task->task_status.stat);
 854                        sas_free_task(task);
 855                        task = NULL;
 856                }
 857        }
 858ex_err:
 859        BUG_ON(retry == 3 && task != NULL);
 860        sas_free_task(task);
 861        return res;
 862}
 863
 864/**
 865  * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
 866  * @dev: the device structure which sas layer used.
 867  */
 868static void pm8001_dev_gone_notify(struct domain_device *dev)
 869{
 870        unsigned long flags = 0;
 871        struct pm8001_hba_info *pm8001_ha;
 872        struct pm8001_device *pm8001_dev = dev->lldd_dev;
 873
 874        pm8001_ha = pm8001_find_ha_by_dev(dev);
 875        spin_lock_irqsave(&pm8001_ha->lock, flags);
 876        if (pm8001_dev) {
 877                u32 device_id = pm8001_dev->device_id;
 878
 879                pm8001_dbg(pm8001_ha, DISC, "found dev[%d:%x] is gone.\n",
 880                           pm8001_dev->device_id, pm8001_dev->dev_type);
 881                if (atomic_read(&pm8001_dev->running_req)) {
 882                        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 883                        pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
 884                                                        dev, 1, 0);
 885                        while (atomic_read(&pm8001_dev->running_req))
 886                                msleep(20);
 887                        spin_lock_irqsave(&pm8001_ha->lock, flags);
 888                }
 889                PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
 890                pm8001_free_dev(pm8001_dev);
 891        } else {
 892                pm8001_dbg(pm8001_ha, DISC, "Found dev has gone.\n");
 893        }
 894        dev->lldd_dev = NULL;
 895        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 896}
 897
 898void pm8001_dev_gone(struct domain_device *dev)
 899{
 900        pm8001_dev_gone_notify(dev);
 901}
 902
 903static int pm8001_issue_ssp_tmf(struct domain_device *dev,
 904        u8 *lun, struct pm8001_tmf_task *tmf)
 905{
 906        struct sas_ssp_task ssp_task;
 907        if (!(dev->tproto & SAS_PROTOCOL_SSP))
 908                return TMF_RESP_FUNC_ESUPP;
 909
 910        memcpy((u8 *)&ssp_task.LUN, lun, 8);
 911        return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
 912                tmf);
 913}
 914
 915/* retry commands by ha, by task and/or by device */
 916void pm8001_open_reject_retry(
 917        struct pm8001_hba_info *pm8001_ha,
 918        struct sas_task *task_to_close,
 919        struct pm8001_device *device_to_close)
 920{
 921        int i;
 922        unsigned long flags;
 923
 924        if (pm8001_ha == NULL)
 925                return;
 926
 927        spin_lock_irqsave(&pm8001_ha->lock, flags);
 928
 929        for (i = 0; i < PM8001_MAX_CCB; i++) {
 930                struct sas_task *task;
 931                struct task_status_struct *ts;
 932                struct pm8001_device *pm8001_dev;
 933                unsigned long flags1;
 934                u32 tag;
 935                struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
 936
 937                pm8001_dev = ccb->device;
 938                if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
 939                        continue;
 940                if (!device_to_close) {
 941                        uintptr_t d = (uintptr_t)pm8001_dev
 942                                        - (uintptr_t)&pm8001_ha->devices;
 943                        if (((d % sizeof(*pm8001_dev)) != 0)
 944                         || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
 945                                continue;
 946                } else if (pm8001_dev != device_to_close)
 947                        continue;
 948                tag = ccb->ccb_tag;
 949                if (!tag || (tag == 0xFFFFFFFF))
 950                        continue;
 951                task = ccb->task;
 952                if (!task || !task->task_done)
 953                        continue;
 954                if (task_to_close && (task != task_to_close))
 955                        continue;
 956                ts = &task->task_status;
 957                ts->resp = SAS_TASK_COMPLETE;
 958                /* Force the midlayer to retry */
 959                ts->stat = SAS_OPEN_REJECT;
 960                ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
 961                if (pm8001_dev)
 962                        atomic_dec(&pm8001_dev->running_req);
 963                spin_lock_irqsave(&task->task_state_lock, flags1);
 964                task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 965                task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 966                task->task_state_flags |= SAS_TASK_STATE_DONE;
 967                if (unlikely((task->task_state_flags
 968                                & SAS_TASK_STATE_ABORTED))) {
 969                        spin_unlock_irqrestore(&task->task_state_lock,
 970                                flags1);
 971                        pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 972                } else {
 973                        spin_unlock_irqrestore(&task->task_state_lock,
 974                                flags1);
 975                        pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
 976                        mb();/* in order to force CPU ordering */
 977                        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 978                        task->task_done(task);
 979                        spin_lock_irqsave(&pm8001_ha->lock, flags);
 980                }
 981        }
 982
 983        spin_unlock_irqrestore(&pm8001_ha->lock, flags);
 984}
 985
 986/**
 987 * pm8001_I_T_nexus_reset()
 988  * Standard mandates link reset for ATA  (type 0) and hard reset for
 989  * SSP (type 1) , only for RECOVERY
 990  * @dev: the device structure for the device to reset.
 991  */
 992int pm8001_I_T_nexus_reset(struct domain_device *dev)
 993{
 994        int rc = TMF_RESP_FUNC_FAILED;
 995        struct pm8001_device *pm8001_dev;
 996        struct pm8001_hba_info *pm8001_ha;
 997        struct sas_phy *phy;
 998
 999        if (!dev || !dev->lldd_dev)
1000                return -ENODEV;
1001
1002        pm8001_dev = dev->lldd_dev;
1003        pm8001_ha = pm8001_find_ha_by_dev(dev);
1004        phy = sas_get_local_phy(dev);
1005
1006        if (dev_is_sata(dev)) {
1007                if (scsi_is_sas_phy_local(phy)) {
1008                        rc = 0;
1009                        goto out;
1010                }
1011                rc = sas_phy_reset(phy, 1);
1012                if (rc) {
1013                        pm8001_dbg(pm8001_ha, EH,
1014                                   "phy reset failed for device %x\n"
1015                                   "with rc %d\n", pm8001_dev->device_id, rc);
1016                        rc = TMF_RESP_FUNC_FAILED;
1017                        goto out;
1018                }
1019                msleep(2000);
1020                rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1021                                                     dev, 1, 0);
1022                if (rc) {
1023                        pm8001_dbg(pm8001_ha, EH, "task abort failed %x\n"
1024                                   "with rc %d\n", pm8001_dev->device_id, rc);
1025                        rc = TMF_RESP_FUNC_FAILED;
1026                }
1027        } else {
1028                rc = sas_phy_reset(phy, 1);
1029                msleep(2000);
1030        }
1031        pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
1032                   pm8001_dev->device_id, rc);
1033 out:
1034        sas_put_local_phy(phy);
1035        return rc;
1036}
1037
1038/*
1039* This function handle the IT_NEXUS_XXX event or completion
1040* status code for SSP/SATA/SMP I/O request.
1041*/
1042int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1043{
1044        int rc = TMF_RESP_FUNC_FAILED;
1045        struct pm8001_device *pm8001_dev;
1046        struct pm8001_hba_info *pm8001_ha;
1047        struct sas_phy *phy;
1048
1049        if (!dev || !dev->lldd_dev)
1050                return -1;
1051
1052        pm8001_dev = dev->lldd_dev;
1053        pm8001_ha = pm8001_find_ha_by_dev(dev);
1054
1055        pm8001_dbg(pm8001_ha, EH, "I_T_Nexus handler invoked !!\n");
1056
1057        phy = sas_get_local_phy(dev);
1058
1059        if (dev_is_sata(dev)) {
1060                DECLARE_COMPLETION_ONSTACK(completion_setstate);
1061                if (scsi_is_sas_phy_local(phy)) {
1062                        rc = 0;
1063                        goto out;
1064                }
1065                /* send internal ssp/sata/smp abort command to FW */
1066                rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1067                                                     dev, 1, 0);
1068                msleep(100);
1069
1070                /* deregister the target device */
1071                pm8001_dev_gone_notify(dev);
1072                msleep(200);
1073
1074                /*send phy reset to hard reset target */
1075                rc = sas_phy_reset(phy, 1);
1076                msleep(2000);
1077                pm8001_dev->setds_completion = &completion_setstate;
1078
1079                wait_for_completion(&completion_setstate);
1080        } else {
1081                /* send internal ssp/sata/smp abort command to FW */
1082                rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1083                                                     dev, 1, 0);
1084                msleep(100);
1085
1086                /* deregister the target device */
1087                pm8001_dev_gone_notify(dev);
1088                msleep(200);
1089
1090                /*send phy reset to hard reset target */
1091                rc = sas_phy_reset(phy, 1);
1092                msleep(2000);
1093        }
1094        pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
1095                   pm8001_dev->device_id, rc);
1096out:
1097        sas_put_local_phy(phy);
1098
1099        return rc;
1100}
1101/* mandatory SAM-3, the task reset the specified LUN*/
1102int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1103{
1104        int rc = TMF_RESP_FUNC_FAILED;
1105        struct pm8001_tmf_task tmf_task;
1106        struct pm8001_device *pm8001_dev = dev->lldd_dev;
1107        struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1108        DECLARE_COMPLETION_ONSTACK(completion_setstate);
1109        if (dev_is_sata(dev)) {
1110                struct sas_phy *phy = sas_get_local_phy(dev);
1111                rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1112                                                     dev, 1, 0);
1113                rc = sas_phy_reset(phy, 1);
1114                sas_put_local_phy(phy);
1115                pm8001_dev->setds_completion = &completion_setstate;
1116                rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1117                        pm8001_dev, DS_OPERATIONAL);
1118                wait_for_completion(&completion_setstate);
1119        } else {
1120                tmf_task.tmf = TMF_LU_RESET;
1121                rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1122        }
1123        /* If failed, fall-through I_T_Nexus reset */
1124        pm8001_dbg(pm8001_ha, EH, "for device[%x]:rc=%d\n",
1125                   pm8001_dev->device_id, rc);
1126        return rc;
1127}
1128
1129/* optional SAM-3 */
1130int pm8001_query_task(struct sas_task *task)
1131{
1132        u32 tag = 0xdeadbeef;
1133        struct scsi_lun lun;
1134        struct pm8001_tmf_task tmf_task;
1135        int rc = TMF_RESP_FUNC_FAILED;
1136        if (unlikely(!task || !task->lldd_task || !task->dev))
1137                return rc;
1138
1139        if (task->task_proto & SAS_PROTOCOL_SSP) {
1140                struct scsi_cmnd *cmnd = task->uldd_task;
1141                struct domain_device *dev = task->dev;
1142                struct pm8001_hba_info *pm8001_ha =
1143                        pm8001_find_ha_by_dev(dev);
1144
1145                int_to_scsilun(cmnd->device->lun, &lun);
1146                rc = pm8001_find_tag(task, &tag);
1147                if (rc == 0) {
1148                        rc = TMF_RESP_FUNC_FAILED;
1149                        return rc;
1150                }
1151                pm8001_dbg(pm8001_ha, EH, "Query:[%16ph]\n", cmnd->cmnd);
1152                tmf_task.tmf =  TMF_QUERY_TASK;
1153                tmf_task.tag_of_task_to_be_managed = tag;
1154
1155                rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1156                switch (rc) {
1157                /* The task is still in Lun, release it then */
1158                case TMF_RESP_FUNC_SUCC:
1159                        pm8001_dbg(pm8001_ha, EH,
1160                                   "The task is still in Lun\n");
1161                        break;
1162                /* The task is not in Lun or failed, reset the phy */
1163                case TMF_RESP_FUNC_FAILED:
1164                case TMF_RESP_FUNC_COMPLETE:
1165                        pm8001_dbg(pm8001_ha, EH,
1166                                   "The task is not in Lun or failed, reset the phy\n");
1167                        break;
1168                }
1169        }
1170        pr_err("pm80xx: rc= %d\n", rc);
1171        return rc;
1172}
1173
1174/*  mandatory SAM-3, still need free task/ccb info, abort the specified task */
1175int pm8001_abort_task(struct sas_task *task)
1176{
1177        unsigned long flags;
1178        u32 tag;
1179        struct domain_device *dev ;
1180        struct pm8001_hba_info *pm8001_ha;
1181        struct scsi_lun lun;
1182        struct pm8001_device *pm8001_dev;
1183        struct pm8001_tmf_task tmf_task;
1184        int rc = TMF_RESP_FUNC_FAILED, ret;
1185        u32 phy_id;
1186        struct sas_task_slow slow_task;
1187
1188        if (unlikely(!task || !task->lldd_task || !task->dev))
1189                return TMF_RESP_FUNC_FAILED;
1190
1191        dev = task->dev;
1192        pm8001_dev = dev->lldd_dev;
1193        pm8001_ha = pm8001_find_ha_by_dev(dev);
1194        phy_id = pm8001_dev->attached_phy;
1195
1196        if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
1197                // If the controller is seeing fatal errors
1198                // abort task will not get a response from the controller
1199                return TMF_RESP_FUNC_FAILED;
1200        }
1201
1202        ret = pm8001_find_tag(task, &tag);
1203        if (ret == 0) {
1204                pm8001_info(pm8001_ha, "no tag for task:%p\n", task);
1205                return TMF_RESP_FUNC_FAILED;
1206        }
1207        spin_lock_irqsave(&task->task_state_lock, flags);
1208        if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1209                spin_unlock_irqrestore(&task->task_state_lock, flags);
1210                return TMF_RESP_FUNC_COMPLETE;
1211        }
1212        task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1213        if (task->slow_task == NULL) {
1214                init_completion(&slow_task.completion);
1215                task->slow_task = &slow_task;
1216        }
1217        spin_unlock_irqrestore(&task->task_state_lock, flags);
1218        if (task->task_proto & SAS_PROTOCOL_SSP) {
1219                struct scsi_cmnd *cmnd = task->uldd_task;
1220                int_to_scsilun(cmnd->device->lun, &lun);
1221                tmf_task.tmf = TMF_ABORT_TASK;
1222                tmf_task.tag_of_task_to_be_managed = tag;
1223                rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1224                pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1225                        pm8001_dev->sas_device, 0, tag);
1226        } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1227                task->task_proto & SAS_PROTOCOL_STP) {
1228                if (pm8001_ha->chip_id == chip_8006) {
1229                        DECLARE_COMPLETION_ONSTACK(completion_reset);
1230                        DECLARE_COMPLETION_ONSTACK(completion);
1231                        struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1232
1233                        /* 1. Set Device state as Recovery */
1234                        pm8001_dev->setds_completion = &completion;
1235                        PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1236                                pm8001_dev, DS_IN_RECOVERY);
1237                        wait_for_completion(&completion);
1238
1239                        /* 2. Send Phy Control Hard Reset */
1240                        reinit_completion(&completion);
1241                        phy->port_reset_status = PORT_RESET_TMO;
1242                        phy->reset_success = false;
1243                        phy->enable_completion = &completion;
1244                        phy->reset_completion = &completion_reset;
1245                        ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1246                                PHY_HARD_RESET);
1247                        if (ret) {
1248                                phy->enable_completion = NULL;
1249                                phy->reset_completion = NULL;
1250                                goto out;
1251                        }
1252
1253                        /* In the case of the reset timeout/fail we still
1254                         * abort the command at the firmware. The assumption
1255                         * here is that the drive is off doing something so
1256                         * that it's not processing requests, and we want to
1257                         * avoid getting a completion for this and either
1258                         * leaking the task in libsas or losing the race and
1259                         * getting a double free.
1260                         */
1261                        pm8001_dbg(pm8001_ha, MSG,
1262                                   "Waiting for local phy ctl\n");
1263                        ret = wait_for_completion_timeout(&completion,
1264                                        PM8001_TASK_TIMEOUT * HZ);
1265                        if (!ret || !phy->reset_success) {
1266                                phy->enable_completion = NULL;
1267                                phy->reset_completion = NULL;
1268                        } else {
1269                                /* 3. Wait for Port Reset complete or
1270                                 * Port reset TMO
1271                                 */
1272                                pm8001_dbg(pm8001_ha, MSG,
1273                                           "Waiting for Port reset\n");
1274                                ret = wait_for_completion_timeout(
1275                                        &completion_reset,
1276                                        PM8001_TASK_TIMEOUT * HZ);
1277                                if (!ret)
1278                                        phy->reset_completion = NULL;
1279                                WARN_ON(phy->port_reset_status ==
1280                                                PORT_RESET_TMO);
1281                                if (phy->port_reset_status == PORT_RESET_TMO) {
1282                                        pm8001_dev_gone_notify(dev);
1283                                        goto out;
1284                                }
1285                        }
1286
1287                        /*
1288                         * 4. SATA Abort ALL
1289                         * we wait for the task to be aborted so that the task
1290                         * is removed from the ccb. on success the caller is
1291                         * going to free the task.
1292                         */
1293                        ret = pm8001_exec_internal_task_abort(pm8001_ha,
1294                                pm8001_dev, pm8001_dev->sas_device, 1, tag);
1295                        if (ret)
1296                                goto out;
1297                        ret = wait_for_completion_timeout(
1298                                &task->slow_task->completion,
1299                                PM8001_TASK_TIMEOUT * HZ);
1300                        if (!ret)
1301                                goto out;
1302
1303                        /* 5. Set Device State as Operational */
1304                        reinit_completion(&completion);
1305                        pm8001_dev->setds_completion = &completion;
1306                        PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1307                                pm8001_dev, DS_OPERATIONAL);
1308                        wait_for_completion(&completion);
1309                } else {
1310                        rc = pm8001_exec_internal_task_abort(pm8001_ha,
1311                                pm8001_dev, pm8001_dev->sas_device, 0, tag);
1312                }
1313                rc = TMF_RESP_FUNC_COMPLETE;
1314        } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1315                /* SMP */
1316                rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1317                        pm8001_dev->sas_device, 0, tag);
1318
1319        }
1320out:
1321        spin_lock_irqsave(&task->task_state_lock, flags);
1322        if (task->slow_task == &slow_task)
1323                task->slow_task = NULL;
1324        spin_unlock_irqrestore(&task->task_state_lock, flags);
1325        if (rc != TMF_RESP_FUNC_COMPLETE)
1326                pm8001_info(pm8001_ha, "rc= %d\n", rc);
1327        return rc;
1328}
1329
1330int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1331{
1332        struct pm8001_tmf_task tmf_task;
1333
1334        tmf_task.tmf = TMF_ABORT_TASK_SET;
1335        return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1336}
1337
1338int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1339{
1340        struct pm8001_tmf_task tmf_task;
1341
1342        tmf_task.tmf = TMF_CLEAR_ACA;
1343        return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1344}
1345
1346int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1347{
1348        struct pm8001_tmf_task tmf_task;
1349        struct pm8001_device *pm8001_dev = dev->lldd_dev;
1350        struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1351
1352        pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",
1353                   pm8001_dev->device_id);
1354        tmf_task.tmf = TMF_CLEAR_TASK_SET;
1355        return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1356}
1357