drivers/scsi/mvsas/mv_sas.c

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