linux/drivers/scsi/mvsas/mv_sas.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Marvell 88SE64xx/88SE94xx main function
   4 *
   5 * Copyright 2007 Red Hat, Inc.
   6 * Copyright 2008 Marvell. <kewei@marvell.com>
   7 * Copyright 2009-2011 Marvell. <yuxiangl@marvell.com>
   8*/
   9
  10#include "mv_sas.h"
  11
  12static int mvs_find_tag(struct mvs_info *mvi, struct sas_task *task, u32 *tag)
  13{
  14        if (task->lldd_task) {
  15                struct mvs_slot_info *slot;
  16                slot = task->lldd_task;
  17                *tag = slot->slot_tag;
  18                return 1;
  19        }
  20        return 0;
  21}
  22
  23void mvs_tag_clear(struct mvs_info *mvi, u32 tag)
  24{
  25        void *bitmap = mvi->tags;
  26        clear_bit(tag, bitmap);
  27}
  28
  29void mvs_tag_free(struct mvs_info *mvi, u32 tag)
  30{
  31        mvs_tag_clear(mvi, tag);
  32}
  33
  34void mvs_tag_set(struct mvs_info *mvi, unsigned int tag)
  35{
  36        void *bitmap = mvi->tags;
  37        set_bit(tag, bitmap);
  38}
  39
  40inline int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out)
  41{
  42        unsigned int index, tag;
  43        void *bitmap = mvi->tags;
  44
  45        index = find_first_zero_bit(bitmap, mvi->tags_num);
  46        tag = index;
  47        if (tag >= mvi->tags_num)
  48                return -SAS_QUEUE_FULL;
  49        mvs_tag_set(mvi, tag);
  50        *tag_out = tag;
  51        return 0;
  52}
  53
  54void mvs_tag_init(struct mvs_info *mvi)
  55{
  56        int i;
  57        for (i = 0; i < mvi->tags_num; ++i)
  58                mvs_tag_clear(mvi, i);
  59}
  60
  61static struct mvs_info *mvs_find_dev_mvi(struct domain_device *dev)
  62{
  63        unsigned long i = 0, j = 0, hi = 0;
  64        struct sas_ha_struct *sha = dev->port->ha;
  65        struct mvs_info *mvi = NULL;
  66        struct asd_sas_phy *phy;
  67
  68        while (sha->sas_port[i]) {
  69                if (sha->sas_port[i] == dev->port) {
  70                        phy =  container_of(sha->sas_port[i]->phy_list.next,
  71                                struct asd_sas_phy, port_phy_el);
  72                        j = 0;
  73                        while (sha->sas_phy[j]) {
  74                                if (sha->sas_phy[j] == phy)
  75                                        break;
  76                                j++;
  77                        }
  78                        break;
  79                }
  80                i++;
  81        }
  82        hi = j/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
  83        mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
  84
  85        return mvi;
  86
  87}
  88
  89static int mvs_find_dev_phyno(struct domain_device *dev, int *phyno)
  90{
  91        unsigned long i = 0, j = 0, n = 0, num = 0;
  92        struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
  93        struct mvs_info *mvi = mvi_dev->mvi_info;
  94        struct sas_ha_struct *sha = dev->port->ha;
  95
  96        while (sha->sas_port[i]) {
  97                if (sha->sas_port[i] == dev->port) {
  98                        struct asd_sas_phy *phy;
  99                        list_for_each_entry(phy,
 100                                &sha->sas_port[i]->phy_list, port_phy_el) {
 101                                j = 0;
 102                                while (sha->sas_phy[j]) {
 103                                        if (sha->sas_phy[j] == phy)
 104                                                break;
 105                                        j++;
 106                                }
 107                                phyno[n] = (j >= mvi->chip->n_phy) ?
 108                                        (j - mvi->chip->n_phy) : j;
 109                                num++;
 110                                n++;
 111                        }
 112                        break;
 113                }
 114                i++;
 115        }
 116        return num;
 117}
 118
 119struct mvs_device *mvs_find_dev_by_reg_set(struct mvs_info *mvi,
 120                                                u8 reg_set)
 121{
 122        u32 dev_no;
 123        for (dev_no = 0; dev_no < MVS_MAX_DEVICES; dev_no++) {
 124                if (mvi->devices[dev_no].taskfileset == MVS_ID_NOT_MAPPED)
 125                        continue;
 126
 127                if (mvi->devices[dev_no].taskfileset == reg_set)
 128                        return &mvi->devices[dev_no];
 129        }
 130        return NULL;
 131}
 132
 133static inline void mvs_free_reg_set(struct mvs_info *mvi,
 134                                struct mvs_device *dev)
 135{
 136        if (!dev) {
 137                mv_printk("device has been free.\n");
 138                return;
 139        }
 140        if (dev->taskfileset == MVS_ID_NOT_MAPPED)
 141                return;
 142        MVS_CHIP_DISP->free_reg_set(mvi, &dev->taskfileset);
 143}
 144
 145static inline u8 mvs_assign_reg_set(struct mvs_info *mvi,
 146                                struct mvs_device *dev)
 147{
 148        if (dev->taskfileset != MVS_ID_NOT_MAPPED)
 149                return 0;
 150        return MVS_CHIP_DISP->assign_reg_set(mvi, &dev->taskfileset);
 151}
 152
 153void mvs_phys_reset(struct mvs_info *mvi, u32 phy_mask, int hard)
 154{
 155        u32 no;
 156        for_each_phy(phy_mask, phy_mask, no) {
 157                if (!(phy_mask & 1))
 158                        continue;
 159                MVS_CHIP_DISP->phy_reset(mvi, no, hard);
 160        }
 161}
 162
 163int mvs_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 164                        void *funcdata)
 165{
 166        int rc = 0, phy_id = sas_phy->id;
 167        u32 tmp, i = 0, hi;
 168        struct sas_ha_struct *sha = sas_phy->ha;
 169        struct mvs_info *mvi = NULL;
 170
 171        while (sha->sas_phy[i]) {
 172                if (sha->sas_phy[i] == sas_phy)
 173                        break;
 174                i++;
 175        }
 176        hi = i/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
 177        mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
 178
 179        switch (func) {
 180        case PHY_FUNC_SET_LINK_RATE:
 181                MVS_CHIP_DISP->phy_set_link_rate(mvi, phy_id, funcdata);
 182                break;
 183
 184        case PHY_FUNC_HARD_RESET:
 185                tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_id);
 186                if (tmp & PHY_RST_HARD)
 187                        break;
 188                MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_HARD_RESET);
 189                break;
 190
 191        case PHY_FUNC_LINK_RESET:
 192                MVS_CHIP_DISP->phy_enable(mvi, phy_id);
 193                MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_SOFT_RESET);
 194                break;
 195
 196        case PHY_FUNC_DISABLE:
 197                MVS_CHIP_DISP->phy_disable(mvi, phy_id);
 198                break;
 199        case PHY_FUNC_RELEASE_SPINUP_HOLD:
 200        default:
 201                rc = -ENOSYS;
 202        }
 203        msleep(200);
 204        return rc;
 205}
 206
 207void mvs_set_sas_addr(struct mvs_info *mvi, int port_id, u32 off_lo,
 208                      u32 off_hi, u64 sas_addr)
 209{
 210        u32 lo = (u32)sas_addr;
 211        u32 hi = (u32)(sas_addr>>32);
 212
 213        MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_lo);
 214        MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, lo);
 215        MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_hi);
 216        MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, hi);
 217}
 218
 219static void mvs_bytes_dmaed(struct mvs_info *mvi, int i, gfp_t gfp_flags)
 220{
 221        struct mvs_phy *phy = &mvi->phy[i];
 222        struct asd_sas_phy *sas_phy = &phy->sas_phy;
 223
 224        if (!phy->phy_attached)
 225                return;
 226
 227        if (!(phy->att_dev_info & PORT_DEV_TRGT_MASK)
 228                && phy->phy_type & PORT_TYPE_SAS) {
 229                return;
 230        }
 231
 232        sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
 233
 234        if (sas_phy->phy) {
 235                struct sas_phy *sphy = sas_phy->phy;
 236
 237                sphy->negotiated_linkrate = sas_phy->linkrate;
 238                sphy->minimum_linkrate = phy->minimum_linkrate;
 239                sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 240                sphy->maximum_linkrate = phy->maximum_linkrate;
 241                sphy->maximum_linkrate_hw = MVS_CHIP_DISP->phy_max_link_rate();
 242        }
 243
 244        if (phy->phy_type & PORT_TYPE_SAS) {
 245                struct sas_identify_frame *id;
 246
 247                id = (struct sas_identify_frame *)phy->frame_rcvd;
 248                id->dev_type = phy->identify.device_type;
 249                id->initiator_bits = SAS_PROTOCOL_ALL;
 250                id->target_bits = phy->identify.target_port_protocols;
 251
 252                /* direct attached SAS device */
 253                if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
 254                        MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
 255                        MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x00);
 256                }
 257        } else if (phy->phy_type & PORT_TYPE_SATA) {
 258                /*Nothing*/
 259        }
 260        mv_dprintk("phy %d byte dmaded.\n", i + mvi->id * mvi->chip->n_phy);
 261
 262        sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 263
 264        sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
 265}
 266
 267void mvs_scan_start(struct Scsi_Host *shost)
 268{
 269        int i, j;
 270        unsigned short core_nr;
 271        struct mvs_info *mvi;
 272        struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 273        struct mvs_prv_info *mvs_prv = sha->lldd_ha;
 274
 275        core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host;
 276
 277        for (j = 0; j < core_nr; j++) {
 278                mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[j];
 279                for (i = 0; i < mvi->chip->n_phy; ++i)
 280                        mvs_bytes_dmaed(mvi, i, GFP_KERNEL);
 281        }
 282        mvs_prv->scan_finished = 1;
 283}
 284
 285int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time)
 286{
 287        struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 288        struct mvs_prv_info *mvs_prv = sha->lldd_ha;
 289
 290        if (mvs_prv->scan_finished == 0)
 291                return 0;
 292
 293        sas_drain_work(sha);
 294        return 1;
 295}
 296
 297static int mvs_task_prep_smp(struct mvs_info *mvi,
 298                             struct mvs_task_exec_info *tei)
 299{
 300        int elem, rc, i;
 301        struct sas_ha_struct *sha = mvi->sas;
 302        struct sas_task *task = tei->task;
 303        struct mvs_cmd_hdr *hdr = tei->hdr;
 304        struct domain_device *dev = task->dev;
 305        struct asd_sas_port *sas_port = dev->port;
 306        struct sas_phy *sphy = dev->phy;
 307        struct asd_sas_phy *sas_phy = sha->sas_phy[sphy->number];
 308        struct scatterlist *sg_req, *sg_resp;
 309        u32 req_len, resp_len, tag = tei->tag;
 310        void *buf_tmp;
 311        u8 *buf_oaf;
 312        dma_addr_t buf_tmp_dma;
 313        void *buf_prd;
 314        struct mvs_slot_info *slot = &mvi->slot_info[tag];
 315        u32 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 316
 317        /*
 318         * DMA-map SMP request, response buffers
 319         */
 320        sg_req = &task->smp_task.smp_req;
 321        elem = dma_map_sg(mvi->dev, sg_req, 1, DMA_TO_DEVICE);
 322        if (!elem)
 323                return -ENOMEM;
 324        req_len = sg_dma_len(sg_req);
 325
 326        sg_resp = &task->smp_task.smp_resp;
 327        elem = dma_map_sg(mvi->dev, sg_resp, 1, DMA_FROM_DEVICE);
 328        if (!elem) {
 329                rc = -ENOMEM;
 330                goto err_out;
 331        }
 332        resp_len = SB_RFB_MAX;
 333
 334        /* must be in dwords */
 335        if ((req_len & 0x3) || (resp_len & 0x3)) {
 336                rc = -EINVAL;
 337                goto err_out_2;
 338        }
 339
 340        /*
 341         * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 342         */
 343
 344        /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ***** */
 345        buf_tmp = slot->buf;
 346        buf_tmp_dma = slot->buf_dma;
 347
 348        hdr->cmd_tbl = cpu_to_le64(sg_dma_address(sg_req));
 349
 350        /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 351        buf_oaf = buf_tmp;
 352        hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 353
 354        buf_tmp += MVS_OAF_SZ;
 355        buf_tmp_dma += MVS_OAF_SZ;
 356
 357        /* region 3: PRD table *********************************** */
 358        buf_prd = buf_tmp;
 359        if (tei->n_elem)
 360                hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 361        else
 362                hdr->prd_tbl = 0;
 363
 364        i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 365        buf_tmp += i;
 366        buf_tmp_dma += i;
 367
 368        /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 369        slot->response = buf_tmp;
 370        hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 371        if (mvi->flags & MVF_FLAG_SOC)
 372                hdr->reserved[0] = 0;
 373
 374        /*
 375         * Fill in TX ring and command slot header
 376         */
 377        slot->tx = mvi->tx_prod;
 378        mvi->tx[mvi->tx_prod] = cpu_to_le32((TXQ_CMD_SMP << TXQ_CMD_SHIFT) |
 379                                        TXQ_MODE_I | tag |
 380                                        (MVS_PHY_ID << TXQ_PHY_SHIFT));
 381
 382        hdr->flags |= flags;
 383        hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | ((req_len - 4) / 4));
 384        hdr->tags = cpu_to_le32(tag);
 385        hdr->data_len = 0;
 386
 387        /* generate open address frame hdr (first 12 bytes) */
 388        /* initiator, SMP, ftype 1h */
 389        buf_oaf[0] = (1 << 7) | (PROTOCOL_SMP << 4) | 0x01;
 390        buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 391        *(u16 *)(buf_oaf + 2) = 0xFFFF;         /* SAS SPEC */
 392        memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 393
 394        /* fill in PRD (scatter/gather) table, if any */
 395        MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 396
 397        return 0;
 398
 399err_out_2:
 400        dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_resp, 1,
 401                     DMA_FROM_DEVICE);
 402err_out:
 403        dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_req, 1,
 404                     DMA_TO_DEVICE);
 405        return rc;
 406}
 407
 408static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag)
 409{
 410        struct ata_queued_cmd *qc = task->uldd_task;
 411
 412        if (qc) {
 413                if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 414                    qc->tf.command == ATA_CMD_FPDMA_READ ||
 415                    qc->tf.command == ATA_CMD_FPDMA_RECV ||
 416                    qc->tf.command == ATA_CMD_FPDMA_SEND ||
 417                    qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
 418                        *tag = qc->tag;
 419                        return 1;
 420                }
 421        }
 422
 423        return 0;
 424}
 425
 426static int mvs_task_prep_ata(struct mvs_info *mvi,
 427                             struct mvs_task_exec_info *tei)
 428{
 429        struct sas_task *task = tei->task;
 430        struct domain_device *dev = task->dev;
 431        struct mvs_device *mvi_dev = dev->lldd_dev;
 432        struct mvs_cmd_hdr *hdr = tei->hdr;
 433        struct asd_sas_port *sas_port = dev->port;
 434        struct mvs_slot_info *slot;
 435        void *buf_prd;
 436        u32 tag = tei->tag, hdr_tag;
 437        u32 flags, del_q;
 438        void *buf_tmp;
 439        u8 *buf_cmd, *buf_oaf;
 440        dma_addr_t buf_tmp_dma;
 441        u32 i, req_len, resp_len;
 442        const u32 max_resp_len = SB_RFB_MAX;
 443
 444        if (mvs_assign_reg_set(mvi, mvi_dev) == MVS_ID_NOT_MAPPED) {
 445                mv_dprintk("Have not enough regiset for dev %d.\n",
 446                        mvi_dev->device_id);
 447                return -EBUSY;
 448        }
 449        slot = &mvi->slot_info[tag];
 450        slot->tx = mvi->tx_prod;
 451        del_q = TXQ_MODE_I | tag |
 452                (TXQ_CMD_STP << TXQ_CMD_SHIFT) |
 453                ((sas_port->phy_mask & TXQ_PHY_MASK) << TXQ_PHY_SHIFT) |
 454                (mvi_dev->taskfileset << TXQ_SRS_SHIFT);
 455        mvi->tx[mvi->tx_prod] = cpu_to_le32(del_q);
 456
 457        if (task->data_dir == DMA_FROM_DEVICE)
 458                flags = (MVS_CHIP_DISP->prd_count() << MCH_PRD_LEN_SHIFT);
 459        else
 460                flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 461
 462        if (task->ata_task.use_ncq)
 463                flags |= MCH_FPDMA;
 464        if (dev->sata_dev.class == ATA_DEV_ATAPI) {
 465                if (task->ata_task.fis.command != ATA_CMD_ID_ATAPI)
 466                        flags |= MCH_ATAPI;
 467        }
 468
 469        hdr->flags = cpu_to_le32(flags);
 470
 471        if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr_tag))
 472                task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3);
 473        else
 474                hdr_tag = tag;
 475
 476        hdr->tags = cpu_to_le32(hdr_tag);
 477
 478        hdr->data_len = cpu_to_le32(task->total_xfer_len);
 479
 480        /*
 481         * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 482         */
 483
 484        /* region 1: command table area (MVS_ATA_CMD_SZ bytes) ************** */
 485        buf_cmd = buf_tmp = slot->buf;
 486        buf_tmp_dma = slot->buf_dma;
 487
 488        hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 489
 490        buf_tmp += MVS_ATA_CMD_SZ;
 491        buf_tmp_dma += MVS_ATA_CMD_SZ;
 492
 493        /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 494        /* used for STP.  unused for SATA? */
 495        buf_oaf = buf_tmp;
 496        hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 497
 498        buf_tmp += MVS_OAF_SZ;
 499        buf_tmp_dma += MVS_OAF_SZ;
 500
 501        /* region 3: PRD table ********************************************* */
 502        buf_prd = buf_tmp;
 503
 504        if (tei->n_elem)
 505                hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 506        else
 507                hdr->prd_tbl = 0;
 508        i = MVS_CHIP_DISP->prd_size() * MVS_CHIP_DISP->prd_count();
 509
 510        buf_tmp += i;
 511        buf_tmp_dma += i;
 512
 513        /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 514        slot->response = buf_tmp;
 515        hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 516        if (mvi->flags & MVF_FLAG_SOC)
 517                hdr->reserved[0] = 0;
 518
 519        req_len = sizeof(struct host_to_dev_fis);
 520        resp_len = MVS_SLOT_BUF_SZ - MVS_ATA_CMD_SZ -
 521            sizeof(struct mvs_err_info) - i;
 522
 523        /* request, response lengths */
 524        resp_len = min(resp_len, max_resp_len);
 525        hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 526
 527        if (likely(!task->ata_task.device_control_reg_update))
 528                task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
 529        /* fill in command FIS and ATAPI CDB */
 530        memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
 531        if (dev->sata_dev.class == ATA_DEV_ATAPI)
 532                memcpy(buf_cmd + STP_ATAPI_CMD,
 533                        task->ata_task.atapi_packet, 16);
 534
 535        /* generate open address frame hdr (first 12 bytes) */
 536        /* initiator, STP, ftype 1h */
 537        buf_oaf[0] = (1 << 7) | (PROTOCOL_STP << 4) | 0x1;
 538        buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 539        *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 540        memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 541
 542        /* fill in PRD (scatter/gather) table, if any */
 543        MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 544
 545        if (task->data_dir == DMA_FROM_DEVICE)
 546                MVS_CHIP_DISP->dma_fix(mvi, sas_port->phy_mask,
 547                                TRASH_BUCKET_SIZE, tei->n_elem, buf_prd);
 548
 549        return 0;
 550}
 551
 552static int mvs_task_prep_ssp(struct mvs_info *mvi,
 553                             struct mvs_task_exec_info *tei, int is_tmf,
 554                             struct mvs_tmf_task *tmf)
 555{
 556        struct sas_task *task = tei->task;
 557        struct mvs_cmd_hdr *hdr = tei->hdr;
 558        struct mvs_port *port = tei->port;
 559        struct domain_device *dev = task->dev;
 560        struct mvs_device *mvi_dev = dev->lldd_dev;
 561        struct asd_sas_port *sas_port = dev->port;
 562        struct mvs_slot_info *slot;
 563        void *buf_prd;
 564        struct ssp_frame_hdr *ssp_hdr;
 565        void *buf_tmp;
 566        u8 *buf_cmd, *buf_oaf, fburst = 0;
 567        dma_addr_t buf_tmp_dma;
 568        u32 flags;
 569        u32 resp_len, req_len, i, tag = tei->tag;
 570        const u32 max_resp_len = SB_RFB_MAX;
 571        u32 phy_mask;
 572
 573        slot = &mvi->slot_info[tag];
 574
 575        phy_mask = ((port->wide_port_phymap) ? port->wide_port_phymap :
 576                sas_port->phy_mask) & TXQ_PHY_MASK;
 577
 578        slot->tx = mvi->tx_prod;
 579        mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag |
 580                                (TXQ_CMD_SSP << TXQ_CMD_SHIFT) |
 581                                (phy_mask << TXQ_PHY_SHIFT));
 582
 583        flags = MCH_RETRY;
 584        if (task->ssp_task.enable_first_burst) {
 585                flags |= MCH_FBURST;
 586                fburst = (1 << 7);
 587        }
 588        if (is_tmf)
 589                flags |= (MCH_SSP_FR_TASK << MCH_SSP_FR_TYPE_SHIFT);
 590        else
 591                flags |= (MCH_SSP_FR_CMD << MCH_SSP_FR_TYPE_SHIFT);
 592
 593        hdr->flags = cpu_to_le32(flags | (tei->n_elem << MCH_PRD_LEN_SHIFT));
 594        hdr->tags = cpu_to_le32(tag);
 595        hdr->data_len = cpu_to_le32(task->total_xfer_len);
 596
 597        /*
 598         * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 599         */
 600
 601        /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ************** */
 602        buf_cmd = buf_tmp = slot->buf;
 603        buf_tmp_dma = slot->buf_dma;
 604
 605        hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 606
 607        buf_tmp += MVS_SSP_CMD_SZ;
 608        buf_tmp_dma += MVS_SSP_CMD_SZ;
 609
 610        /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 611        buf_oaf = buf_tmp;
 612        hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 613
 614        buf_tmp += MVS_OAF_SZ;
 615        buf_tmp_dma += MVS_OAF_SZ;
 616
 617        /* region 3: PRD table ********************************************* */
 618        buf_prd = buf_tmp;
 619        if (tei->n_elem)
 620                hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 621        else
 622                hdr->prd_tbl = 0;
 623
 624        i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 625        buf_tmp += i;
 626        buf_tmp_dma += i;
 627
 628        /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 629        slot->response = buf_tmp;
 630        hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 631        if (mvi->flags & MVF_FLAG_SOC)
 632                hdr->reserved[0] = 0;
 633
 634        resp_len = MVS_SLOT_BUF_SZ - MVS_SSP_CMD_SZ - MVS_OAF_SZ -
 635            sizeof(struct mvs_err_info) - i;
 636        resp_len = min(resp_len, max_resp_len);
 637
 638        req_len = sizeof(struct ssp_frame_hdr) + 28;
 639
 640        /* request, response lengths */
 641        hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 642
 643        /* generate open address frame hdr (first 12 bytes) */
 644        /* initiator, SSP, ftype 1h */
 645        buf_oaf[0] = (1 << 7) | (PROTOCOL_SSP << 4) | 0x1;
 646        buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 647        *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 648        memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 649
 650        /* fill in SSP frame header (Command Table.SSP frame header) */
 651        ssp_hdr = (struct ssp_frame_hdr *)buf_cmd;
 652
 653        if (is_tmf)
 654                ssp_hdr->frame_type = SSP_TASK;
 655        else
 656                ssp_hdr->frame_type = SSP_COMMAND;
 657
 658        memcpy(ssp_hdr->hashed_dest_addr, dev->hashed_sas_addr,
 659               HASHED_SAS_ADDR_SIZE);
 660        memcpy(ssp_hdr->hashed_src_addr,
 661               dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
 662        ssp_hdr->tag = cpu_to_be16(tag);
 663
 664        /* fill in IU for TASK and Command Frame */
 665        buf_cmd += sizeof(*ssp_hdr);
 666        memcpy(buf_cmd, &task->ssp_task.LUN, 8);
 667
 668        if (ssp_hdr->frame_type != SSP_TASK) {
 669                buf_cmd[9] = fburst | task->ssp_task.task_attr |
 670                                (task->ssp_task.task_prio << 3);
 671                memcpy(buf_cmd + 12, task->ssp_task.cmd->cmnd,
 672                       task->ssp_task.cmd->cmd_len);
 673        } else{
 674                buf_cmd[10] = tmf->tmf;
 675                switch (tmf->tmf) {
 676                case TMF_ABORT_TASK:
 677                case TMF_QUERY_TASK:
 678                        buf_cmd[12] =
 679                                (tmf->tag_of_task_to_be_managed >> 8) & 0xff;
 680                        buf_cmd[13] =
 681                                tmf->tag_of_task_to_be_managed & 0xff;
 682                        break;
 683                default:
 684                        break;
 685                }
 686        }
 687        /* fill in PRD (scatter/gather) table, if any */
 688        MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 689        return 0;
 690}
 691
 692#define DEV_IS_GONE(mvi_dev)    ((!mvi_dev || (mvi_dev->dev_type == SAS_PHY_UNUSED)))
 693static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf,
 694                                struct mvs_tmf_task *tmf, int *pass)
 695{
 696        struct domain_device *dev = task->dev;
 697        struct mvs_device *mvi_dev = dev->lldd_dev;
 698        struct mvs_task_exec_info tei;
 699        struct mvs_slot_info *slot;
 700        u32 tag = 0xdeadbeef, n_elem = 0;
 701        int rc = 0;
 702
 703        if (!dev->port) {
 704                struct task_status_struct *tsm = &task->task_status;
 705
 706                tsm->resp = SAS_TASK_UNDELIVERED;
 707                tsm->stat = SAS_PHY_DOWN;
 708                /*
 709                 * libsas will use dev->port, should
 710                 * not call task_done for sata
 711                 */
 712                if (dev->dev_type != SAS_SATA_DEV)
 713                        task->task_done(task);
 714                return rc;
 715        }
 716
 717        if (DEV_IS_GONE(mvi_dev)) {
 718                if (mvi_dev)
 719                        mv_dprintk("device %d not ready.\n",
 720                                mvi_dev->device_id);
 721                else
 722                        mv_dprintk("device %016llx not ready.\n",
 723                                SAS_ADDR(dev->sas_addr));
 724
 725                rc = SAS_PHY_DOWN;
 726                return rc;
 727        }
 728        tei.port = dev->port->lldd_port;
 729        if (tei.port && !tei.port->port_attached && !tmf) {
 730                if (sas_protocol_ata(task->task_proto)) {
 731                        struct task_status_struct *ts = &task->task_status;
 732                        mv_dprintk("SATA/STP port %d does not attach"
 733                                        "device.\n", dev->port->id);
 734                        ts->resp = SAS_TASK_COMPLETE;
 735                        ts->stat = SAS_PHY_DOWN;
 736
 737                        task->task_done(task);
 738
 739                } else {
 740                        struct task_status_struct *ts = &task->task_status;
 741                        mv_dprintk("SAS port %d does not attach"
 742                                "device.\n", dev->port->id);
 743                        ts->resp = SAS_TASK_UNDELIVERED;
 744                        ts->stat = SAS_PHY_DOWN;
 745                        task->task_done(task);
 746                }
 747                return rc;
 748        }
 749
 750        if (!sas_protocol_ata(task->task_proto)) {
 751                if (task->num_scatter) {
 752                        n_elem = dma_map_sg(mvi->dev,
 753                                            task->scatter,
 754                                            task->num_scatter,
 755                                            task->data_dir);
 756                        if (!n_elem) {
 757                                rc = -ENOMEM;
 758                                goto prep_out;
 759                        }
 760                }
 761        } else {
 762                n_elem = task->num_scatter;
 763        }
 764
 765        rc = mvs_tag_alloc(mvi, &tag);
 766        if (rc)
 767                goto err_out;
 768
 769        slot = &mvi->slot_info[tag];
 770
 771        task->lldd_task = NULL;
 772        slot->n_elem = n_elem;
 773        slot->slot_tag = tag;
 774
 775        slot->buf = dma_pool_zalloc(mvi->dma_pool, GFP_ATOMIC, &slot->buf_dma);
 776        if (!slot->buf) {
 777                rc = -ENOMEM;
 778                goto err_out_tag;
 779        }
 780
 781        tei.task = task;
 782        tei.hdr = &mvi->slot[tag];
 783        tei.tag = tag;
 784        tei.n_elem = n_elem;
 785        switch (task->task_proto) {
 786        case SAS_PROTOCOL_SMP:
 787                rc = mvs_task_prep_smp(mvi, &tei);
 788                break;
 789        case SAS_PROTOCOL_SSP:
 790                rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf);
 791                break;
 792        case SAS_PROTOCOL_SATA:
 793        case SAS_PROTOCOL_STP:
 794        case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 795                rc = mvs_task_prep_ata(mvi, &tei);
 796                break;
 797        default:
 798                dev_printk(KERN_ERR, mvi->dev,
 799                        "unknown sas_task proto: 0x%x\n",
 800                        task->task_proto);
 801                rc = -EINVAL;
 802                break;
 803        }
 804
 805        if (rc) {
 806                mv_dprintk("rc is %x\n", rc);
 807                goto err_out_slot_buf;
 808        }
 809        slot->task = task;
 810        slot->port = tei.port;
 811        task->lldd_task = slot;
 812        list_add_tail(&slot->entry, &tei.port->list);
 813        spin_lock(&task->task_state_lock);
 814        task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 815        spin_unlock(&task->task_state_lock);
 816
 817        mvi_dev->running_req++;
 818        ++(*pass);
 819        mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
 820
 821        return rc;
 822
 823err_out_slot_buf:
 824        dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
 825err_out_tag:
 826        mvs_tag_free(mvi, tag);
 827err_out:
 828
 829        dev_printk(KERN_ERR, mvi->dev, "mvsas prep failed[%d]!\n", rc);
 830        if (!sas_protocol_ata(task->task_proto))
 831                if (n_elem)
 832                        dma_unmap_sg(mvi->dev, task->scatter, n_elem,
 833                                     task->data_dir);
 834prep_out:
 835        return rc;
 836}
 837
 838static int mvs_task_exec(struct sas_task *task, gfp_t gfp_flags,
 839                                struct completion *completion, int is_tmf,
 840                                struct mvs_tmf_task *tmf)
 841{
 842        struct mvs_info *mvi = NULL;
 843        u32 rc = 0;
 844        u32 pass = 0;
 845        unsigned long flags = 0;
 846
 847        mvi = ((struct mvs_device *)task->dev->lldd_dev)->mvi_info;
 848
 849        spin_lock_irqsave(&mvi->lock, flags);
 850        rc = mvs_task_prep(task, mvi, is_tmf, tmf, &pass);
 851        if (rc)
 852                dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
 853
 854        if (likely(pass))
 855                        MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) &
 856                                (MVS_CHIP_SLOT_SZ - 1));
 857        spin_unlock_irqrestore(&mvi->lock, flags);
 858
 859        return rc;
 860}
 861
 862int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags)
 863{
 864        return mvs_task_exec(task, gfp_flags, NULL, 0, NULL);
 865}
 866
 867static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc)
 868{
 869        u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
 870        mvs_tag_clear(mvi, slot_idx);
 871}
 872
 873static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task,
 874                          struct mvs_slot_info *slot, u32 slot_idx)
 875{
 876        if (!slot)
 877                return;
 878        if (!slot->task)
 879                return;
 880        if (!sas_protocol_ata(task->task_proto))
 881                if (slot->n_elem)
 882                        dma_unmap_sg(mvi->dev, task->scatter,
 883                                     slot->n_elem, task->data_dir);
 884
 885        switch (task->task_proto) {
 886        case SAS_PROTOCOL_SMP:
 887                dma_unmap_sg(mvi->dev, &task->smp_task.smp_resp, 1,
 888                             DMA_FROM_DEVICE);
 889                dma_unmap_sg(mvi->dev, &task->smp_task.smp_req, 1,
 890                             DMA_TO_DEVICE);
 891                break;
 892
 893        case SAS_PROTOCOL_SATA:
 894        case SAS_PROTOCOL_STP:
 895        case SAS_PROTOCOL_SSP:
 896        default:
 897                /* do nothing */
 898                break;
 899        }
 900
 901        if (slot->buf) {
 902                dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
 903                slot->buf = NULL;
 904        }
 905        list_del_init(&slot->entry);
 906        task->lldd_task = NULL;
 907        slot->task = NULL;
 908        slot->port = NULL;
 909        slot->slot_tag = 0xFFFFFFFF;
 910        mvs_slot_free(mvi, slot_idx);
 911}
 912
 913static void mvs_update_wideport(struct mvs_info *mvi, int phy_no)
 914{
 915        struct mvs_phy *phy = &mvi->phy[phy_no];
 916        struct mvs_port *port = phy->port;
 917        int j, no;
 918
 919        for_each_phy(port->wide_port_phymap, j, no) {
 920                if (j & 1) {
 921                        MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
 922                                                PHYR_WIDE_PORT);
 923                        MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
 924                                                port->wide_port_phymap);
 925                } else {
 926                        MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
 927                                                PHYR_WIDE_PORT);
 928                        MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
 929                                                0);
 930                }
 931        }
 932}
 933
 934static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i)
 935{
 936        u32 tmp;
 937        struct mvs_phy *phy = &mvi->phy[i];
 938        struct mvs_port *port = phy->port;
 939
 940        tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, i);
 941        if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) {
 942                if (!port)
 943                        phy->phy_attached = 1;
 944                return tmp;
 945        }
 946
 947        if (port) {
 948                if (phy->phy_type & PORT_TYPE_SAS) {
 949                        port->wide_port_phymap &= ~(1U << i);
 950                        if (!port->wide_port_phymap)
 951                                port->port_attached = 0;
 952                        mvs_update_wideport(mvi, i);
 953                } else if (phy->phy_type & PORT_TYPE_SATA)
 954                        port->port_attached = 0;
 955                phy->port = NULL;
 956                phy->phy_attached = 0;
 957                phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);
 958        }
 959        return 0;
 960}
 961
 962static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf)
 963{
 964        u32 *s = (u32 *) buf;
 965
 966        if (!s)
 967                return NULL;
 968
 969        MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG3);
 970        s[3] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 971
 972        MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG2);
 973        s[2] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 974
 975        MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG1);
 976        s[1] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 977
 978        MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG0);
 979        s[0] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 980
 981        if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01))
 982                s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10);
 983
 984        return s;
 985}
 986
 987static u32 mvs_is_sig_fis_received(u32 irq_status)
 988{
 989        return irq_status & PHYEV_SIG_FIS;
 990}
 991
 992static void mvs_sig_remove_timer(struct mvs_phy *phy)
 993{
 994        if (phy->timer.function)
 995                del_timer(&phy->timer);
 996        phy->timer.function = NULL;
 997}
 998
 999void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st)
1000{
1001        struct mvs_phy *phy = &mvi->phy[i];
1002        struct sas_identify_frame *id;
1003
1004        id = (struct sas_identify_frame *)phy->frame_rcvd;
1005
1006        if (get_st) {
1007                phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, i);
1008                phy->phy_status = mvs_is_phy_ready(mvi, i);
1009        }
1010
1011        if (phy->phy_status) {
1012                int oob_done = 0;
1013                struct asd_sas_phy *sas_phy = &mvi->phy[i].sas_phy;
1014
1015                oob_done = MVS_CHIP_DISP->oob_done(mvi, i);
1016
1017                MVS_CHIP_DISP->fix_phy_info(mvi, i, id);
1018                if (phy->phy_type & PORT_TYPE_SATA) {
1019                        phy->identify.target_port_protocols = SAS_PROTOCOL_STP;
1020                        if (mvs_is_sig_fis_received(phy->irq_status)) {
1021                                mvs_sig_remove_timer(phy);
1022                                phy->phy_attached = 1;
1023                                phy->att_dev_sas_addr =
1024                                        i + mvi->id * mvi->chip->n_phy;
1025                                if (oob_done)
1026                                        sas_phy->oob_mode = SATA_OOB_MODE;
1027                                phy->frame_rcvd_size =
1028                                    sizeof(struct dev_to_host_fis);
1029                                mvs_get_d2h_reg(mvi, i, id);
1030                        } else {
1031                                u32 tmp;
1032                                dev_printk(KERN_DEBUG, mvi->dev,
1033                                        "Phy%d : No sig fis\n", i);
1034                                tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, i);
1035                                MVS_CHIP_DISP->write_port_irq_mask(mvi, i,
1036                                                tmp | PHYEV_SIG_FIS);
1037                                phy->phy_attached = 0;
1038                                phy->phy_type &= ~PORT_TYPE_SATA;
1039                                goto out_done;
1040                        }
1041                }       else if (phy->phy_type & PORT_TYPE_SAS
1042                        || phy->att_dev_info & PORT_SSP_INIT_MASK) {
1043                        phy->phy_attached = 1;
1044                        phy->identify.device_type =
1045                                phy->att_dev_info & PORT_DEV_TYPE_MASK;
1046
1047                        if (phy->identify.device_type == SAS_END_DEVICE)
1048                                phy->identify.target_port_protocols =
1049                                                        SAS_PROTOCOL_SSP;
1050                        else if (phy->identify.device_type != SAS_PHY_UNUSED)
1051                                phy->identify.target_port_protocols =
1052                                                        SAS_PROTOCOL_SMP;
1053                        if (oob_done)
1054                                sas_phy->oob_mode = SAS_OOB_MODE;
1055                        phy->frame_rcvd_size =
1056                            sizeof(struct sas_identify_frame);
1057                }
1058                memcpy(sas_phy->attached_sas_addr,
1059                        &phy->att_dev_sas_addr, SAS_ADDR_SIZE);
1060
1061                if (MVS_CHIP_DISP->phy_work_around)
1062                        MVS_CHIP_DISP->phy_work_around(mvi, i);
1063        }
1064        mv_dprintk("phy %d attach dev info is %x\n",
1065                i + mvi->id * mvi->chip->n_phy, phy->att_dev_info);
1066        mv_dprintk("phy %d attach sas addr is %llx\n",
1067                i + mvi->id * mvi->chip->n_phy, phy->att_dev_sas_addr);
1068out_done:
1069        if (get_st)
1070                MVS_CHIP_DISP->write_port_irq_stat(mvi, i, phy->irq_status);
1071}
1072
1073static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
1074{
1075        struct sas_ha_struct *sas_ha = sas_phy->ha;
1076        struct mvs_info *mvi = NULL; int i = 0, hi;
1077        struct mvs_phy *phy = sas_phy->lldd_phy;
1078        struct asd_sas_port *sas_port = sas_phy->port;
1079        struct mvs_port *port;
1080        unsigned long flags = 0;
1081        if (!sas_port)
1082                return;
1083
1084        while (sas_ha->sas_phy[i]) {
1085                if (sas_ha->sas_phy[i] == sas_phy)
1086                        break;
1087                i++;
1088        }
1089        hi = i/((struct mvs_prv_info *)sas_ha->lldd_ha)->n_phy;
1090        mvi = ((struct mvs_prv_info *)sas_ha->lldd_ha)->mvi[hi];
1091        if (i >= mvi->chip->n_phy)
1092                port = &mvi->port[i - mvi->chip->n_phy];
1093        else
1094                port = &mvi->port[i];
1095        if (lock)
1096                spin_lock_irqsave(&mvi->lock, flags);
1097        port->port_attached = 1;
1098        phy->port = port;
1099        sas_port->lldd_port = port;
1100        if (phy->phy_type & PORT_TYPE_SAS) {
1101                port->wide_port_phymap = sas_port->phy_mask;
1102                mv_printk("set wide port phy map %x\n", sas_port->phy_mask);
1103                mvs_update_wideport(mvi, sas_phy->id);
1104
1105                /* direct attached SAS device */
1106                if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
1107                        MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
1108                        MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x04);
1109                }
1110        }
1111        if (lock)
1112                spin_unlock_irqrestore(&mvi->lock, flags);
1113}
1114
1115static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock)
1116{
1117        struct domain_device *dev;
1118        struct mvs_phy *phy = sas_phy->lldd_phy;
1119        struct mvs_info *mvi = phy->mvi;
1120        struct asd_sas_port *port = sas_phy->port;
1121        int phy_no = 0;
1122
1123        while (phy != &mvi->phy[phy_no]) {
1124                phy_no++;
1125                if (phy_no >= MVS_MAX_PHYS)
1126                        return;
1127        }
1128        list_for_each_entry(dev, &port->dev_list, dev_list_node)
1129                mvs_do_release_task(phy->mvi, phy_no, dev);
1130
1131}
1132
1133
1134void mvs_port_formed(struct asd_sas_phy *sas_phy)
1135{
1136        mvs_port_notify_formed(sas_phy, 1);
1137}
1138
1139void mvs_port_deformed(struct asd_sas_phy *sas_phy)
1140{
1141        mvs_port_notify_deformed(sas_phy, 1);
1142}
1143
1144static struct mvs_device *mvs_alloc_dev(struct mvs_info *mvi)
1145{
1146        u32 dev;
1147        for (dev = 0; dev < MVS_MAX_DEVICES; dev++) {
1148                if (mvi->devices[dev].dev_type == SAS_PHY_UNUSED) {
1149                        mvi->devices[dev].device_id = dev;
1150                        return &mvi->devices[dev];
1151                }
1152        }
1153
1154        if (dev == MVS_MAX_DEVICES)
1155                mv_printk("max support %d devices, ignore ..\n",
1156                        MVS_MAX_DEVICES);
1157
1158        return NULL;
1159}
1160
1161static void mvs_free_dev(struct mvs_device *mvi_dev)
1162{
1163        u32 id = mvi_dev->device_id;
1164        memset(mvi_dev, 0, sizeof(*mvi_dev));
1165        mvi_dev->device_id = id;
1166        mvi_dev->dev_type = SAS_PHY_UNUSED;
1167        mvi_dev->dev_status = MVS_DEV_NORMAL;
1168        mvi_dev->taskfileset = MVS_ID_NOT_MAPPED;
1169}
1170
1171static int mvs_dev_found_notify(struct domain_device *dev, int lock)
1172{
1173        unsigned long flags = 0;
1174        int res = 0;
1175        struct mvs_info *mvi = NULL;
1176        struct domain_device *parent_dev = dev->parent;
1177        struct mvs_device *mvi_device;
1178
1179        mvi = mvs_find_dev_mvi(dev);
1180
1181        if (lock)
1182                spin_lock_irqsave(&mvi->lock, flags);
1183
1184        mvi_device = mvs_alloc_dev(mvi);
1185        if (!mvi_device) {
1186                res = -1;
1187                goto found_out;
1188        }
1189        dev->lldd_dev = mvi_device;
1190        mvi_device->dev_status = MVS_DEV_NORMAL;
1191        mvi_device->dev_type = dev->dev_type;
1192        mvi_device->mvi_info = mvi;
1193        mvi_device->sas_device = dev;
1194        if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
1195                int phy_id;
1196                u8 phy_num = parent_dev->ex_dev.num_phys;
1197                struct ex_phy *phy;
1198                for (phy_id = 0; phy_id < phy_num; phy_id++) {
1199                        phy = &parent_dev->ex_dev.ex_phy[phy_id];
1200                        if (SAS_ADDR(phy->attached_sas_addr) ==
1201                                SAS_ADDR(dev->sas_addr)) {
1202                                mvi_device->attached_phy = phy_id;
1203                                break;
1204                        }
1205                }
1206
1207                if (phy_id == phy_num) {
1208                        mv_printk("Error: no attached dev:%016llx"
1209                                "at ex:%016llx.\n",
1210                                SAS_ADDR(dev->sas_addr),
1211                                SAS_ADDR(parent_dev->sas_addr));
1212                        res = -1;
1213                }
1214        }
1215
1216found_out:
1217        if (lock)
1218                spin_unlock_irqrestore(&mvi->lock, flags);
1219        return res;
1220}
1221
1222int mvs_dev_found(struct domain_device *dev)
1223{
1224        return mvs_dev_found_notify(dev, 1);
1225}
1226
1227static void mvs_dev_gone_notify(struct domain_device *dev)
1228{
1229        unsigned long flags = 0;
1230        struct mvs_device *mvi_dev = dev->lldd_dev;
1231        struct mvs_info *mvi;
1232
1233        if (!mvi_dev) {
1234                mv_dprintk("found dev has gone.\n");
1235                return;
1236        }
1237
1238        mvi = mvi_dev->mvi_info;
1239
1240        spin_lock_irqsave(&mvi->lock, flags);
1241
1242        mv_dprintk("found dev[%d:%x] is gone.\n",
1243                mvi_dev->device_id, mvi_dev->dev_type);
1244        mvs_release_task(mvi, dev);
1245        mvs_free_reg_set(mvi, mvi_dev);
1246        mvs_free_dev(mvi_dev);
1247
1248        dev->lldd_dev = NULL;
1249        mvi_dev->sas_device = NULL;
1250
1251        spin_unlock_irqrestore(&mvi->lock, flags);
1252}
1253
1254
1255void mvs_dev_gone(struct domain_device *dev)
1256{
1257        mvs_dev_gone_notify(dev);
1258}
1259
1260static void mvs_task_done(struct sas_task *task)
1261{
1262        if (!del_timer(&task->slow_task->timer))
1263                return;
1264        complete(&task->slow_task->completion);
1265}
1266
1267static void mvs_tmf_timedout(struct timer_list *t)
1268{
1269        struct sas_task_slow *slow = from_timer(slow, t, timer);
1270        struct sas_task *task = slow->task;
1271
1272        task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1273        complete(&task->slow_task->completion);
1274}
1275
1276#define MVS_TASK_TIMEOUT 20
1277static int mvs_exec_internal_tmf_task(struct domain_device *dev,
1278                        void *parameter, u32 para_len, struct mvs_tmf_task *tmf)
1279{
1280        int res, retry;
1281        struct sas_task *task = NULL;
1282
1283        for (retry = 0; retry < 3; retry++) {
1284                task = sas_alloc_slow_task(GFP_KERNEL);
1285                if (!task)
1286                        return -ENOMEM;
1287
1288                task->dev = dev;
1289                task->task_proto = dev->tproto;
1290
1291                memcpy(&task->ssp_task, parameter, para_len);
1292                task->task_done = mvs_task_done;
1293
1294                task->slow_task->timer.function = mvs_tmf_timedout;
1295                task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ;
1296                add_timer(&task->slow_task->timer);
1297
1298                res = mvs_task_exec(task, GFP_KERNEL, NULL, 1, tmf);
1299
1300                if (res) {
1301                        del_timer(&task->slow_task->timer);
1302                        mv_printk("executing internal task failed:%d\n", res);
1303                        goto ex_err;
1304                }
1305
1306                wait_for_completion(&task->slow_task->completion);
1307                res = TMF_RESP_FUNC_FAILED;
1308                /* Even TMF timed out, return direct. */
1309                if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1310                        if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1311                                mv_printk("TMF task[%x] timeout.\n", tmf->tmf);
1312                                goto ex_err;
1313                        }
1314                }
1315
1316                if (task->task_status.resp == SAS_TASK_COMPLETE &&
1317                    task->task_status.stat == SAM_STAT_GOOD) {
1318                        res = TMF_RESP_FUNC_COMPLETE;
1319                        break;
1320                }
1321
1322                if (task->task_status.resp == SAS_TASK_COMPLETE &&
1323                      task->task_status.stat == SAS_DATA_UNDERRUN) {
1324                        /* no error, but return the number of bytes of
1325                         * underrun */
1326                        res = task->task_status.residual;
1327                        break;
1328                }
1329
1330                if (task->task_status.resp == SAS_TASK_COMPLETE &&
1331                      task->task_status.stat == SAS_DATA_OVERRUN) {
1332                        mv_dprintk("blocked task error.\n");
1333                        res = -EMSGSIZE;
1334                        break;
1335                } else {
1336                        mv_dprintk(" task to dev %016llx response: 0x%x "
1337                                    "status 0x%x\n",
1338                                    SAS_ADDR(dev->sas_addr),
1339                                    task->task_status.resp,
1340                                    task->task_status.stat);
1341                        sas_free_task(task);
1342                        task = NULL;
1343
1344                }
1345        }
1346ex_err:
1347        BUG_ON(retry == 3 && task != NULL);
1348        sas_free_task(task);
1349        return res;
1350}
1351
1352static int mvs_debug_issue_ssp_tmf(struct domain_device *dev,
1353                                u8 *lun, struct mvs_tmf_task *tmf)
1354{
1355        struct sas_ssp_task ssp_task;
1356        if (!(dev->tproto & SAS_PROTOCOL_SSP))
1357                return TMF_RESP_FUNC_ESUPP;
1358
1359        memcpy(ssp_task.LUN, lun, 8);
1360
1361        return mvs_exec_internal_tmf_task(dev, &ssp_task,
1362                                sizeof(ssp_task), tmf);
1363}
1364
1365
1366/*  Standard mandates link reset for ATA  (type 0)
1367    and hard reset for SSP (type 1) , only for RECOVERY */
1368static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
1369{
1370        int rc;
1371        struct sas_phy *phy = sas_get_local_phy(dev);
1372        int reset_type = (dev->dev_type == SAS_SATA_DEV ||
1373                        (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1374        rc = sas_phy_reset(phy, reset_type);
1375        sas_put_local_phy(phy);
1376        msleep(2000);
1377        return rc;
1378}
1379
1380/* mandatory SAM-3 */
1381int mvs_lu_reset(struct domain_device *dev, u8 *lun)
1382{
1383        unsigned long flags;
1384        int rc = TMF_RESP_FUNC_FAILED;
1385        struct mvs_tmf_task tmf_task;
1386        struct mvs_device * mvi_dev = dev->lldd_dev;
1387        struct mvs_info *mvi = mvi_dev->mvi_info;
1388
1389        tmf_task.tmf = TMF_LU_RESET;
1390        mvi_dev->dev_status = MVS_DEV_EH;
1391        rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1392        if (rc == TMF_RESP_FUNC_COMPLETE) {
1393                spin_lock_irqsave(&mvi->lock, flags);
1394                mvs_release_task(mvi, dev);
1395                spin_unlock_irqrestore(&mvi->lock, flags);
1396        }
1397        /* If failed, fall-through I_T_Nexus reset */
1398        mv_printk("%s for device[%x]:rc= %d\n", __func__,
1399                        mvi_dev->device_id, rc);
1400        return rc;
1401}
1402
1403int mvs_I_T_nexus_reset(struct domain_device *dev)
1404{
1405        unsigned long flags;
1406        int rc = TMF_RESP_FUNC_FAILED;
1407        struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1408        struct mvs_info *mvi = mvi_dev->mvi_info;
1409
1410        if (mvi_dev->dev_status != MVS_DEV_EH)
1411                return TMF_RESP_FUNC_COMPLETE;
1412        else
1413                mvi_dev->dev_status = MVS_DEV_NORMAL;
1414        rc = mvs_debug_I_T_nexus_reset(dev);
1415        mv_printk("%s for device[%x]:rc= %d\n",
1416                __func__, mvi_dev->device_id, rc);
1417
1418        spin_lock_irqsave(&mvi->lock, flags);
1419        mvs_release_task(mvi, dev);
1420        spin_unlock_irqrestore(&mvi->lock, flags);
1421
1422        return rc;
1423}
1424/* optional SAM-3 */
1425int mvs_query_task(struct sas_task *task)
1426{
1427        u32 tag;
1428        struct scsi_lun lun;
1429        struct mvs_tmf_task tmf_task;
1430        int rc = TMF_RESP_FUNC_FAILED;
1431
1432        if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1433                struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1434                struct domain_device *dev = task->dev;
1435                struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1436                struct mvs_info *mvi = mvi_dev->mvi_info;
1437
1438                int_to_scsilun(cmnd->device->lun, &lun);
1439                rc = mvs_find_tag(mvi, task, &tag);
1440                if (rc == 0) {
1441                        rc = TMF_RESP_FUNC_FAILED;
1442                        return rc;
1443                }
1444
1445                tmf_task.tmf = TMF_QUERY_TASK;
1446                tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1447
1448                rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1449                switch (rc) {
1450                /* The task is still in Lun, release it then */
1451                case TMF_RESP_FUNC_SUCC:
1452                /* The task is not in Lun or failed, reset the phy */
1453                case TMF_RESP_FUNC_FAILED:
1454                case TMF_RESP_FUNC_COMPLETE:
1455                        break;
1456                }
1457        }
1458        mv_printk("%s:rc= %d\n", __func__, rc);
1459        return rc;
1460}
1461
1462/*  mandatory SAM-3, still need free task/slot info */
1463int mvs_abort_task(struct sas_task *task)
1464{
1465        struct scsi_lun lun;
1466        struct mvs_tmf_task tmf_task;
1467        struct domain_device *dev = task->dev;
1468        struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1469        struct mvs_info *mvi;
1470        int rc = TMF_RESP_FUNC_FAILED;
1471        unsigned long flags;
1472        u32 tag;
1473
1474        if (!mvi_dev) {
1475                mv_printk("Device has removed\n");
1476                return TMF_RESP_FUNC_FAILED;
1477        }
1478
1479        mvi = mvi_dev->mvi_info;
1480
1481        spin_lock_irqsave(&task->task_state_lock, flags);
1482        if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1483                spin_unlock_irqrestore(&task->task_state_lock, flags);
1484                rc = TMF_RESP_FUNC_COMPLETE;
1485                goto out;
1486        }
1487        spin_unlock_irqrestore(&task->task_state_lock, flags);
1488        mvi_dev->dev_status = MVS_DEV_EH;
1489        if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1490                struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1491
1492                int_to_scsilun(cmnd->device->lun, &lun);
1493                rc = mvs_find_tag(mvi, task, &tag);
1494                if (rc == 0) {
1495                        mv_printk("No such tag in %s\n", __func__);
1496                        rc = TMF_RESP_FUNC_FAILED;
1497                        return rc;
1498                }
1499
1500                tmf_task.tmf = TMF_ABORT_TASK;
1501                tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1502
1503                rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1504
1505                /* if successful, clear the task and callback forwards.*/
1506                if (rc == TMF_RESP_FUNC_COMPLETE) {
1507                        u32 slot_no;
1508                        struct mvs_slot_info *slot;
1509
1510                        if (task->lldd_task) {
1511                                slot = task->lldd_task;
1512                                slot_no = (u32) (slot - mvi->slot_info);
1513                                spin_lock_irqsave(&mvi->lock, flags);
1514                                mvs_slot_complete(mvi, slot_no, 1);
1515                                spin_unlock_irqrestore(&mvi->lock, flags);
1516                        }
1517                }
1518
1519        } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1520                task->task_proto & SAS_PROTOCOL_STP) {
1521                if (SAS_SATA_DEV == dev->dev_type) {
1522                        struct mvs_slot_info *slot = task->lldd_task;
1523                        u32 slot_idx = (u32)(slot - mvi->slot_info);
1524                        mv_dprintk("mvs_abort_task() mvi=%p task=%p "
1525                                   "slot=%p slot_idx=x%x\n",
1526                                   mvi, task, slot, slot_idx);
1527                        task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1528                        mvs_slot_task_free(mvi, task, slot, slot_idx);
1529                        rc = TMF_RESP_FUNC_COMPLETE;
1530                        goto out;
1531                }
1532
1533        }
1534out:
1535        if (rc != TMF_RESP_FUNC_COMPLETE)
1536                mv_printk("%s:rc= %d\n", __func__, rc);
1537        return rc;
1538}
1539
1540int mvs_abort_task_set(struct domain_device *dev, u8 *lun)
1541{
1542        int rc;
1543        struct mvs_tmf_task tmf_task;
1544
1545        tmf_task.tmf = TMF_ABORT_TASK_SET;
1546        rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1547
1548        return rc;
1549}
1550
1551int mvs_clear_aca(struct domain_device *dev, u8 *lun)
1552{
1553        int rc = TMF_RESP_FUNC_FAILED;
1554        struct mvs_tmf_task tmf_task;
1555
1556        tmf_task.tmf = TMF_CLEAR_ACA;
1557        rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1558
1559        return rc;
1560}
1561
1562int mvs_clear_task_set(struct domain_device *dev, u8 *lun)
1563{
1564        int rc = TMF_RESP_FUNC_FAILED;
1565        struct mvs_tmf_task tmf_task;
1566
1567        tmf_task.tmf = TMF_CLEAR_TASK_SET;
1568        rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1569
1570        return rc;
1571}
1572
1573static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
1574                        u32 slot_idx, int err)
1575{
1576        struct mvs_device *mvi_dev = task->dev->lldd_dev;
1577        struct task_status_struct *tstat = &task->task_status;
1578        struct ata_task_resp *resp = (struct ata_task_resp *)tstat->buf;
1579        int stat = SAM_STAT_GOOD;
1580
1581
1582        resp->frame_len = sizeof(struct dev_to_host_fis);
1583        memcpy(&resp->ending_fis[0],
1584               SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset),
1585               sizeof(struct dev_to_host_fis));
1586        tstat->buf_valid_size = sizeof(*resp);
1587        if (unlikely(err)) {
1588                if (unlikely(err & CMD_ISS_STPD))
1589                        stat = SAS_OPEN_REJECT;
1590                else
1591                        stat = SAS_PROTO_RESPONSE;
1592       }
1593
1594        return stat;
1595}
1596
1597static void mvs_set_sense(u8 *buffer, int len, int d_sense,
1598                int key, int asc, int ascq)
1599{
1600        memset(buffer, 0, len);
1601
1602        if (d_sense) {
1603                /* Descriptor format */
1604                if (len < 4) {
1605                        mv_printk("Length %d of sense buffer too small to "
1606                                "fit sense %x:%x:%x", len, key, asc, ascq);
1607                }
1608
1609                buffer[0] = 0x72;               /* Response Code        */
1610                if (len > 1)
1611                        buffer[1] = key;        /* Sense Key */
1612                if (len > 2)
1613                        buffer[2] = asc;        /* ASC  */
1614                if (len > 3)
1615                        buffer[3] = ascq;       /* ASCQ */
1616        } else {
1617                if (len < 14) {
1618                        mv_printk("Length %d of sense buffer too small to "
1619                                "fit sense %x:%x:%x", len, key, asc, ascq);
1620                }
1621
1622                buffer[0] = 0x70;               /* Response Code        */
1623                if (len > 2)
1624                        buffer[2] = key;        /* Sense Key */
1625                if (len > 7)
1626                        buffer[7] = 0x0a;       /* Additional Sense Length */
1627                if (len > 12)
1628                        buffer[12] = asc;       /* ASC */
1629                if (len > 13)
1630                        buffer[13] = ascq; /* ASCQ */
1631        }
1632
1633        return;
1634}
1635
1636static void mvs_fill_ssp_resp_iu(struct ssp_response_iu *iu,
1637                                u8 key, u8 asc, u8 asc_q)
1638{
1639        iu->datapres = 2;
1640        iu->response_data_len = 0;
1641        iu->sense_data_len = 17;
1642        iu->status = 02;
1643        mvs_set_sense(iu->sense_data, 17, 0,
1644                        key, asc, asc_q);
1645}
1646
1647static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task,
1648                         u32 slot_idx)
1649{
1650        struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1651        int stat;
1652        u32 err_dw0 = le32_to_cpu(*(u32 *)slot->response);
1653        u32 err_dw1 = le32_to_cpu(*((u32 *)slot->response + 1));
1654        u32 tfs = 0;
1655        enum mvs_port_type type = PORT_TYPE_SAS;
1656
1657        if (err_dw0 & CMD_ISS_STPD)
1658                MVS_CHIP_DISP->issue_stop(mvi, type, tfs);
1659
1660        MVS_CHIP_DISP->command_active(mvi, slot_idx);
1661
1662        stat = SAM_STAT_CHECK_CONDITION;
1663        switch (task->task_proto) {
1664        case SAS_PROTOCOL_SSP:
1665        {
1666                stat = SAS_ABORTED_TASK;
1667                if ((err_dw0 & NO_DEST) || err_dw1 & bit(31)) {
1668                        struct ssp_response_iu *iu = slot->response +
1669                                sizeof(struct mvs_err_info);
1670                        mvs_fill_ssp_resp_iu(iu, NOT_READY, 0x04, 01);
1671                        sas_ssp_task_response(mvi->dev, task, iu);
1672                        stat = SAM_STAT_CHECK_CONDITION;
1673                }
1674                if (err_dw1 & bit(31))
1675                        mv_printk("reuse same slot, retry command.\n");
1676                break;
1677        }
1678        case SAS_PROTOCOL_SMP:
1679                stat = SAM_STAT_CHECK_CONDITION;
1680                break;
1681
1682        case SAS_PROTOCOL_SATA:
1683        case SAS_PROTOCOL_STP:
1684        case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
1685        {
1686                task->ata_task.use_ncq = 0;
1687                stat = SAS_PROTO_RESPONSE;
1688                mvs_sata_done(mvi, task, slot_idx, err_dw0);
1689        }
1690                break;
1691        default:
1692                break;
1693        }
1694
1695        return stat;
1696}
1697
1698int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
1699{
1700        u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1701        struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1702        struct sas_task *task = slot->task;
1703        struct mvs_device *mvi_dev = NULL;
1704        struct task_status_struct *tstat;
1705        struct domain_device *dev;
1706        u32 aborted;
1707
1708        void *to;
1709        enum exec_status sts;
1710
1711        if (unlikely(!task || !task->lldd_task || !task->dev))
1712                return -1;
1713
1714        tstat = &task->task_status;
1715        dev = task->dev;
1716        mvi_dev = dev->lldd_dev;
1717
1718        spin_lock(&task->task_state_lock);
1719        task->task_state_flags &=
1720                ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1721        task->task_state_flags |= SAS_TASK_STATE_DONE;
1722        /* race condition*/
1723        aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED;
1724        spin_unlock(&task->task_state_lock);
1725
1726        memset(tstat, 0, sizeof(*tstat));
1727        tstat->resp = SAS_TASK_COMPLETE;
1728
1729        if (unlikely(aborted)) {
1730                tstat->stat = SAS_ABORTED_TASK;
1731                if (mvi_dev && mvi_dev->running_req)
1732                        mvi_dev->running_req--;
1733                if (sas_protocol_ata(task->task_proto))
1734                        mvs_free_reg_set(mvi, mvi_dev);
1735
1736                mvs_slot_task_free(mvi, task, slot, slot_idx);
1737                return -1;
1738        }
1739
1740        /* when no device attaching, go ahead and complete by error handling*/
1741        if (unlikely(!mvi_dev || flags)) {
1742                if (!mvi_dev)
1743                        mv_dprintk("port has not device.\n");
1744                tstat->stat = SAS_PHY_DOWN;
1745                goto out;
1746        }
1747
1748        /*
1749         * error info record present; slot->response is 32 bit aligned but may
1750         * not be 64 bit aligned, so check for zero in two 32 bit reads
1751         */
1752        if (unlikely((rx_desc & RXQ_ERR)
1753                     && (*((u32 *)slot->response)
1754                         || *(((u32 *)slot->response) + 1)))) {
1755                mv_dprintk("port %d slot %d rx_desc %X has error info"
1756                        "%016llX.\n", slot->port->sas_port.id, slot_idx,
1757                         rx_desc, get_unaligned_le64(slot->response));
1758                tstat->stat = mvs_slot_err(mvi, task, slot_idx);
1759                tstat->resp = SAS_TASK_COMPLETE;
1760                goto out;
1761        }
1762
1763        switch (task->task_proto) {
1764        case SAS_PROTOCOL_SSP:
1765                /* hw says status == 0, datapres == 0 */
1766                if (rx_desc & RXQ_GOOD) {
1767                        tstat->stat = SAM_STAT_GOOD;
1768                        tstat->resp = SAS_TASK_COMPLETE;
1769                }
1770                /* response frame present */
1771                else if (rx_desc & RXQ_RSP) {
1772                        struct ssp_response_iu *iu = slot->response +
1773                                                sizeof(struct mvs_err_info);
1774                        sas_ssp_task_response(mvi->dev, task, iu);
1775                } else
1776                        tstat->stat = SAM_STAT_CHECK_CONDITION;
1777                break;
1778
1779        case SAS_PROTOCOL_SMP: {
1780                        struct scatterlist *sg_resp = &task->smp_task.smp_resp;
1781                        tstat->stat = SAM_STAT_GOOD;
1782                        to = kmap_atomic(sg_page(sg_resp));
1783                        memcpy(to + sg_resp->offset,
1784                                slot->response + sizeof(struct mvs_err_info),
1785                                sg_dma_len(sg_resp));
1786                        kunmap_atomic(to);
1787                        break;
1788                }
1789
1790        case SAS_PROTOCOL_SATA:
1791        case SAS_PROTOCOL_STP:
1792        case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: {
1793                        tstat->stat = mvs_sata_done(mvi, task, slot_idx, 0);
1794                        break;
1795                }
1796
1797        default:
1798                tstat->stat = SAM_STAT_CHECK_CONDITION;
1799                break;
1800        }
1801        if (!slot->port->port_attached) {
1802                mv_dprintk("port %d has removed.\n", slot->port->sas_port.id);
1803                tstat->stat = SAS_PHY_DOWN;
1804        }
1805
1806
1807out:
1808        if (mvi_dev && mvi_dev->running_req) {
1809                mvi_dev->running_req--;
1810                if (sas_protocol_ata(task->task_proto) && !mvi_dev->running_req)
1811                        mvs_free_reg_set(mvi, mvi_dev);
1812        }
1813        mvs_slot_task_free(mvi, task, slot, slot_idx);
1814        sts = tstat->stat;
1815
1816        spin_unlock(&mvi->lock);
1817        if (task->task_done)
1818                task->task_done(task);
1819
1820        spin_lock(&mvi->lock);
1821
1822        return sts;
1823}
1824
1825void mvs_do_release_task(struct mvs_info *mvi,
1826                int phy_no, struct domain_device *dev)
1827{
1828        u32 slot_idx;
1829        struct mvs_phy *phy;
1830        struct mvs_port *port;
1831        struct mvs_slot_info *slot, *slot2;
1832
1833        phy = &mvi->phy[phy_no];
1834        port = phy->port;
1835        if (!port)
1836                return;
1837        /* clean cmpl queue in case request is already finished */
1838        mvs_int_rx(mvi, false);
1839
1840
1841
1842        list_for_each_entry_safe(slot, slot2, &port->list, entry) {
1843                struct sas_task *task;
1844                slot_idx = (u32) (slot - mvi->slot_info);
1845                task = slot->task;
1846
1847                if (dev && task->dev != dev)
1848                        continue;
1849
1850                mv_printk("Release slot [%x] tag[%x], task [%p]:\n",
1851                        slot_idx, slot->slot_tag, task);
1852                MVS_CHIP_DISP->command_active(mvi, slot_idx);
1853
1854                mvs_slot_complete(mvi, slot_idx, 1);
1855        }
1856}
1857
1858void mvs_release_task(struct mvs_info *mvi,
1859                      struct domain_device *dev)
1860{
1861        int i, phyno[WIDE_PORT_MAX_PHY], num;
1862        num = mvs_find_dev_phyno(dev, phyno);
1863        for (i = 0; i < num; i++)
1864                mvs_do_release_task(mvi, phyno[i], dev);
1865}
1866
1867static void mvs_phy_disconnected(struct mvs_phy *phy)
1868{
1869        phy->phy_attached = 0;
1870        phy->att_dev_info = 0;
1871        phy->att_dev_sas_addr = 0;
1872}
1873
1874static void mvs_work_queue(struct work_struct *work)
1875{
1876        struct delayed_work *dw = container_of(work, struct delayed_work, work);
1877        struct mvs_wq *mwq = container_of(dw, struct mvs_wq, work_q);
1878        struct mvs_info *mvi = mwq->mvi;
1879        unsigned long flags;
1880        u32 phy_no = (unsigned long) mwq->data;
1881        struct mvs_phy *phy = &mvi->phy[phy_no];
1882        struct asd_sas_phy *sas_phy = &phy->sas_phy;
1883
1884        spin_lock_irqsave(&mvi->lock, flags);
1885        if (mwq->handler & PHY_PLUG_EVENT) {
1886
1887                if (phy->phy_event & PHY_PLUG_OUT) {
1888                        u32 tmp;
1889
1890                        tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no);
1891                        phy->phy_event &= ~PHY_PLUG_OUT;
1892                        if (!(tmp & PHY_READY_MASK)) {
1893                                sas_phy_disconnected(sas_phy);
1894                                mvs_phy_disconnected(phy);
1895                                sas_notify_phy_event(sas_phy,
1896                                        PHYE_LOSS_OF_SIGNAL, GFP_ATOMIC);
1897                                mv_dprintk("phy%d Removed Device\n", phy_no);
1898                        } else {
1899                                MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1900                                mvs_update_phyinfo(mvi, phy_no, 1);
1901                                mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC);
1902                                mvs_port_notify_formed(sas_phy, 0);
1903                                mv_dprintk("phy%d Attached Device\n", phy_no);
1904                        }
1905                }
1906        } else if (mwq->handler & EXP_BRCT_CHG) {
1907                phy->phy_event &= ~EXP_BRCT_CHG;
1908                sas_notify_port_event(sas_phy,
1909                                PORTE_BROADCAST_RCVD, GFP_ATOMIC);
1910                mv_dprintk("phy%d Got Broadcast Change\n", phy_no);
1911        }
1912        list_del(&mwq->entry);
1913        spin_unlock_irqrestore(&mvi->lock, flags);
1914        kfree(mwq);
1915}
1916
1917static int mvs_handle_event(struct mvs_info *mvi, void *data, int handler)
1918{
1919        struct mvs_wq *mwq;
1920        int ret = 0;
1921
1922        mwq = kmalloc(sizeof(struct mvs_wq), GFP_ATOMIC);
1923        if (mwq) {
1924                mwq->mvi = mvi;
1925                mwq->data = data;
1926                mwq->handler = handler;
1927                MV_INIT_DELAYED_WORK(&mwq->work_q, mvs_work_queue, mwq);
1928                list_add_tail(&mwq->entry, &mvi->wq_list);
1929                schedule_delayed_work(&mwq->work_q, HZ * 2);
1930        } else
1931                ret = -ENOMEM;
1932
1933        return ret;
1934}
1935
1936static void mvs_sig_time_out(struct timer_list *t)
1937{
1938        struct mvs_phy *phy = from_timer(phy, t, timer);
1939        struct mvs_info *mvi = phy->mvi;
1940        u8 phy_no;
1941
1942        for (phy_no = 0; phy_no < mvi->chip->n_phy; phy_no++) {
1943                if (&mvi->phy[phy_no] == phy) {
1944                        mv_dprintk("Get signature time out, reset phy %d\n",
1945                                phy_no+mvi->id*mvi->chip->n_phy);
1946                        MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_HARD_RESET);
1947                }
1948        }
1949}
1950
1951void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
1952{
1953        u32 tmp;
1954        struct mvs_phy *phy = &mvi->phy[phy_no];
1955
1956        phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, phy_no);
1957        MVS_CHIP_DISP->write_port_irq_stat(mvi, phy_no, phy->irq_status);
1958        mv_dprintk("phy %d ctrl sts=0x%08X.\n", phy_no+mvi->id*mvi->chip->n_phy,
1959                MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no));
1960        mv_dprintk("phy %d irq sts = 0x%08X\n", phy_no+mvi->id*mvi->chip->n_phy,
1961                phy->irq_status);
1962
1963        /*
1964        * events is port event now ,
1965        * we need check the interrupt status which belongs to per port.
1966        */
1967
1968        if (phy->irq_status & PHYEV_DCDR_ERR) {
1969                mv_dprintk("phy %d STP decoding error.\n",
1970                phy_no + mvi->id*mvi->chip->n_phy);
1971        }
1972
1973        if (phy->irq_status & PHYEV_POOF) {
1974                mdelay(500);
1975                if (!(phy->phy_event & PHY_PLUG_OUT)) {
1976                        int dev_sata = phy->phy_type & PORT_TYPE_SATA;
1977                        int ready;
1978                        mvs_do_release_task(mvi, phy_no, NULL);
1979                        phy->phy_event |= PHY_PLUG_OUT;
1980                        MVS_CHIP_DISP->clear_srs_irq(mvi, 0, 1);
1981                        mvs_handle_event(mvi,
1982                                (void *)(unsigned long)phy_no,
1983                                PHY_PLUG_EVENT);
1984                        ready = mvs_is_phy_ready(mvi, phy_no);
1985                        if (ready || dev_sata) {
1986                                if (MVS_CHIP_DISP->stp_reset)
1987                                        MVS_CHIP_DISP->stp_reset(mvi,
1988                                                        phy_no);
1989                                else
1990                                        MVS_CHIP_DISP->phy_reset(mvi,
1991                                                        phy_no, MVS_SOFT_RESET);
1992                                return;
1993                        }
1994                }
1995        }
1996
1997        if (phy->irq_status & PHYEV_COMWAKE) {
1998                tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, phy_no);
1999                MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
2000                                        tmp | PHYEV_SIG_FIS);
2001                if (phy->timer.function == NULL) {
2002                        phy->timer.function = mvs_sig_time_out;
2003                        phy->timer.expires = jiffies + 5*HZ;
2004                        add_timer(&phy->timer);
2005                }
2006        }
2007        if (phy->irq_status & (PHYEV_SIG_FIS | PHYEV_ID_DONE)) {
2008                phy->phy_status = mvs_is_phy_ready(mvi, phy_no);
2009                mv_dprintk("notify plug in on phy[%d]\n", phy_no);
2010                if (phy->phy_status) {
2011                        mdelay(10);
2012                        MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
2013                        if (phy->phy_type & PORT_TYPE_SATA) {
2014                                tmp = MVS_CHIP_DISP->read_port_irq_mask(
2015                                                mvi, phy_no);
2016                                tmp &= ~PHYEV_SIG_FIS;
2017                                MVS_CHIP_DISP->write_port_irq_mask(mvi,
2018                                                        phy_no, tmp);
2019                        }
2020                        mvs_update_phyinfo(mvi, phy_no, 0);
2021                        if (phy->phy_type & PORT_TYPE_SAS) {
2022                                MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_PHY_TUNE);
2023                                mdelay(10);
2024                        }
2025
2026                        mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC);
2027                        /* whether driver is going to handle hot plug */
2028                        if (phy->phy_event & PHY_PLUG_OUT) {
2029                                mvs_port_notify_formed(&phy->sas_phy, 0);
2030                                phy->phy_event &= ~PHY_PLUG_OUT;
2031                        }
2032                } else {
2033                        mv_dprintk("plugin interrupt but phy%d is gone\n",
2034                                phy_no + mvi->id*mvi->chip->n_phy);
2035                }
2036        } else if (phy->irq_status & PHYEV_BROAD_CH) {
2037                mv_dprintk("phy %d broadcast change.\n",
2038                        phy_no + mvi->id*mvi->chip->n_phy);
2039                mvs_handle_event(mvi, (void *)(unsigned long)phy_no,
2040                                EXP_BRCT_CHG);
2041        }
2042}
2043
2044int mvs_int_rx(struct mvs_info *mvi, bool self_clear)
2045{
2046        u32 rx_prod_idx, rx_desc;
2047        bool attn = false;
2048
2049        /* the first dword in the RX ring is special: it contains
2050         * a mirror of the hardware's RX producer index, so that
2051         * we don't have to stall the CPU reading that register.
2052         * The actual RX ring is offset by one dword, due to this.
2053         */
2054        rx_prod_idx = mvi->rx_cons;
2055        mvi->rx_cons = le32_to_cpu(mvi->rx[0]);
2056        if (mvi->rx_cons == 0xfff)      /* h/w hasn't touched RX ring yet */
2057                return 0;
2058
2059        /* The CMPL_Q may come late, read from register and try again
2060        * note: if coalescing is enabled,
2061        * it will need to read from register every time for sure
2062        */
2063        if (unlikely(mvi->rx_cons == rx_prod_idx))
2064                mvi->rx_cons = MVS_CHIP_DISP->rx_update(mvi) & RX_RING_SZ_MASK;
2065
2066        if (mvi->rx_cons == rx_prod_idx)
2067                return 0;
2068
2069        while (mvi->rx_cons != rx_prod_idx) {
2070                /* increment our internal RX consumer pointer */
2071                rx_prod_idx = (rx_prod_idx + 1) & (MVS_RX_RING_SZ - 1);
2072                rx_desc = le32_to_cpu(mvi->rx[rx_prod_idx + 1]);
2073
2074                if (likely(rx_desc & RXQ_DONE))
2075                        mvs_slot_complete(mvi, rx_desc, 0);
2076                if (rx_desc & RXQ_ATTN) {
2077                        attn = true;
2078                } else if (rx_desc & RXQ_ERR) {
2079                        if (!(rx_desc & RXQ_DONE))
2080                                mvs_slot_complete(mvi, rx_desc, 0);
2081                } else if (rx_desc & RXQ_SLOT_RESET) {
2082                        mvs_slot_free(mvi, rx_desc);
2083                }
2084        }
2085
2086        if (attn && self_clear)
2087                MVS_CHIP_DISP->int_full(mvi);
2088        return 0;
2089}
2090
2091int mvs_gpio_write(struct sas_ha_struct *sha, u8 reg_type, u8 reg_index,
2092                        u8 reg_count, u8 *write_data)
2093{
2094        struct mvs_prv_info *mvs_prv = sha->lldd_ha;
2095        struct mvs_info *mvi = mvs_prv->mvi[0];
2096
2097        if (MVS_CHIP_DISP->gpio_write) {
2098                return MVS_CHIP_DISP->gpio_write(mvs_prv, reg_type,
2099                        reg_index, reg_count, write_data);
2100        }
2101
2102        return -ENOSYS;
2103}
2104