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 sas_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 sas_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 int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags)
 841 {
 842         struct mvs_info *mvi = NULL;
 843         u32 rc = 0;
 844         u32 pass = 0;
 845         unsigned long flags = 0;
 846         struct sas_tmf_task *tmf = task->tmf;
 847         int is_tmf = !!task->tmf;
 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 static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc)
 865 {
 866         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
 867         mvs_tag_clear(mvi, slot_idx);
 868 }
 869
 870 static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task,
 871                           struct mvs_slot_info *slot, u32 slot_idx)
 872 {
 873         if (!slot)
 874                 return;
 875         if (!slot->task)
 876                 return;
 877         if (!sas_protocol_ata(task->task_proto))
 878                 if (slot->n_elem)
 879                         dma_unmap_sg(mvi->dev, task->scatter,
 880                                      slot->n_elem, task->data_dir);
 881
 882         switch (task->task_proto) {
 883         case SAS_PROTOCOL_SMP:
 884                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_resp, 1,
 885                              DMA_FROM_DEVICE);
 886                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_req, 1,
 887                              DMA_TO_DEVICE);
 888                 break;
 889
 890         case SAS_PROTOCOL_SATA:
 891         case SAS_PROTOCOL_STP:
 892         case SAS_PROTOCOL_SSP:
 893         default:
 894                 /* do nothing */
 895                 break;
 896         }
 897
 898         if (slot->buf) {
 899                 dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
 900                 slot->buf = NULL;
 901         }
 902         list_del_init(&slot->entry);
 903         task->lldd_task = NULL;
 904         slot->task = NULL;
 905         slot->port = NULL;
 906         slot->slot_tag = 0xFFFFFFFF;
 907         mvs_slot_free(mvi, slot_idx);
 908 }
 909
 910 static void mvs_update_wideport(struct mvs_info *mvi, int phy_no)
 911 {
 912         struct mvs_phy *phy = &mvi->phy[phy_no];
 913         struct mvs_port *port = phy->port;
 914         int j, no;
 915
 916         for_each_phy(port->wide_port_phymap, j, no) {
 917                 if (j & 1) {
 918                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
 919                                                 PHYR_WIDE_PORT);
 920                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
 921                                                 port->wide_port_phymap);
 922                 } else {
 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                                                 0);
 927                 }
 928         }
 929 }
 930
 931 static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i)
 932 {
 933         u32 tmp;
 934         struct mvs_phy *phy = &mvi->phy[i];
 935         struct mvs_port *port = phy->port;
 936
 937         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, i);
 938         if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) {
 939                 if (!port)
 940                         phy->phy_attached = 1;
 941                 return tmp;
 942         }
 943
 944         if (port) {
 945                 if (phy->phy_type & PORT_TYPE_SAS) {
 946                         port->wide_port_phymap &= ~(1U << i);
 947                         if (!port->wide_port_phymap)
 948                                 port->port_attached = 0;
 949                         mvs_update_wideport(mvi, i);
 950                 } else if (phy->phy_type & PORT_TYPE_SATA)
 951                         port->port_attached = 0;
 952                 phy->port = NULL;
 953                 phy->phy_attached = 0;
 954                 phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);
 955         }
 956         return 0;
 957 }
 958
 959 static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf)
 960 {
 961         u32 *s = (u32 *) buf;
 962
 963         if (!s)
 964                 return NULL;
 965
 966         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG3);
 967         s[3] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 968
 969         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG2);
 970         s[2] = 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_SIG1);
 973         s[1] = 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_SIG0);
 976         s[0] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 977
 978         if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01))
 979                 s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10);
 980
 981         return s;
 982 }
 983
 984 static u32 mvs_is_sig_fis_received(u32 irq_status)
 985 {
 986         return irq_status & PHYEV_SIG_FIS;
 987 }
 988
 989 static void mvs_sig_remove_timer(struct mvs_phy *phy)
 990 {
 991         if (phy->timer.function)
 992                 del_timer(&phy->timer);
 993         phy->timer.function = NULL;
 994 }
 995
 996 void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st)
 997 {
 998         struct mvs_phy *phy = &mvi->phy[i];
 999         struct sas_identify_frame *id;
1000
1001         id = (struct sas_identify_frame *)phy->frame_rcvd;
1002
1003         if (get_st) {
1004                 phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, i);
1005                 phy->phy_status = mvs_is_phy_ready(mvi, i);
1006         }
1007
1008         if (phy->phy_status) {
1009                 int oob_done = 0;
1010                 struct asd_sas_phy *sas_phy = &mvi->phy[i].sas_phy;
1011
1012                 oob_done = MVS_CHIP_DISP->oob_done(mvi, i);
1013
1014                 MVS_CHIP_DISP->fix_phy_info(mvi, i, id);
1015                 if (phy->phy_type & PORT_TYPE_SATA) {
1016                         phy->identify.target_port_protocols = SAS_PROTOCOL_STP;
1017                         if (mvs_is_sig_fis_received(phy->irq_status)) {
1018                                 mvs_sig_remove_timer(phy);
1019                                 phy->phy_attached = 1;
1020                                 phy->att_dev_sas_addr =
1021                                         i + mvi->id * mvi->chip->n_phy;
1022                                 if (oob_done)
1023                                         sas_phy->oob_mode = SATA_OOB_MODE;
1024                                 phy->frame_rcvd_size =
1025                                     sizeof(struct dev_to_host_fis);
1026                                 mvs_get_d2h_reg(mvi, i, id);
1027                         } else {
1028                                 u32 tmp;
1029                                 dev_printk(KERN_DEBUG, mvi->dev,
1030                                         "Phy%d : No sig fis\n", i);
1031                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, i);
1032                                 MVS_CHIP_DISP->write_port_irq_mask(mvi, i,
1033                                                 tmp | PHYEV_SIG_FIS);
1034                                 phy->phy_attached = 0;
1035                                 phy->phy_type &= ~PORT_TYPE_SATA;
1036                                 goto out_done;
1037                         }
1038                 }       else if (phy->phy_type & PORT_TYPE_SAS
1039                         || phy->att_dev_info & PORT_SSP_INIT_MASK) {
1040                         phy->phy_attached = 1;
1041                         phy->identify.device_type =
1042                                 phy->att_dev_info & PORT_DEV_TYPE_MASK;
1043
1044                         if (phy->identify.device_type == SAS_END_DEVICE)
1045                                 phy->identify.target_port_protocols =
1046                                                         SAS_PROTOCOL_SSP;
1047                         else if (phy->identify.device_type != SAS_PHY_UNUSED)
1048                                 phy->identify.target_port_protocols =
1049                                                         SAS_PROTOCOL_SMP;
1050                         if (oob_done)
1051                                 sas_phy->oob_mode = SAS_OOB_MODE;
1052                         phy->frame_rcvd_size =
1053                             sizeof(struct sas_identify_frame);
1054                 }
1055                 memcpy(sas_phy->attached_sas_addr,
1056                         &phy->att_dev_sas_addr, SAS_ADDR_SIZE);
1057
1058                 if (MVS_CHIP_DISP->phy_work_around)
1059                         MVS_CHIP_DISP->phy_work_around(mvi, i);
1060         }
1061         mv_dprintk("phy %d attach dev info is %x\n",
1062                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_info);
1063         mv_dprintk("phy %d attach sas addr is %llx\n",
1064                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_sas_addr);
1065 out_done:
1066         if (get_st)
1067                 MVS_CHIP_DISP->write_port_irq_stat(mvi, i, phy->irq_status);
1068 }
1069
1070 static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
1071 {
1072         struct sas_ha_struct *sas_ha = sas_phy->ha;
1073         struct mvs_info *mvi = NULL; int i = 0, hi;
1074         struct mvs_phy *phy = sas_phy->lldd_phy;
1075         struct asd_sas_port *sas_port = sas_phy->port;
1076         struct mvs_port *port;
1077         unsigned long flags = 0;
1078         if (!sas_port)
1079                 return;
1080
1081         while (sas_ha->sas_phy[i]) {
1082                 if (sas_ha->sas_phy[i] == sas_phy)
1083                         break;
1084                 i++;
1085         }
1086         hi = i/((struct mvs_prv_info *)sas_ha->lldd_ha)->n_phy;
1087         mvi = ((struct mvs_prv_info *)sas_ha->lldd_ha)->mvi[hi];
1088         if (i >= mvi->chip->n_phy)
1089                 port = &mvi->port[i - mvi->chip->n_phy];
1090         else
1091                 port = &mvi->port[i];
1092         if (lock)
1093                 spin_lock_irqsave(&mvi->lock, flags);
1094         port->port_attached = 1;
1095         phy->port = port;
1096         sas_port->lldd_port = port;
1097         if (phy->phy_type & PORT_TYPE_SAS) {
1098                 port->wide_port_phymap = sas_port->phy_mask;
1099                 mv_printk("set wide port phy map %x\n", sas_port->phy_mask);
1100                 mvs_update_wideport(mvi, sas_phy->id);
1101
1102                 /* direct attached SAS device */
1103                 if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
1104                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
1105                         MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x04);
1106                 }
1107         }
1108         if (lock)
1109                 spin_unlock_irqrestore(&mvi->lock, flags);
1110 }
1111
1112 static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock)
1113 {
1114         struct domain_device *dev;
1115         struct mvs_phy *phy = sas_phy->lldd_phy;
1116         struct mvs_info *mvi = phy->mvi;
1117         struct asd_sas_port *port = sas_phy->port;
1118         int phy_no = 0;
1119
1120         while (phy != &mvi->phy[phy_no]) {
1121                 phy_no++;
1122                 if (phy_no >= MVS_MAX_PHYS)
1123                         return;
1124         }
1125         list_for_each_entry(dev, &port->dev_list, dev_list_node)
1126                 mvs_do_release_task(phy->mvi, phy_no, dev);
1127
1128 }
1129
1130
1131 void mvs_port_formed(struct asd_sas_phy *sas_phy)
1132 {
1133         mvs_port_notify_formed(sas_phy, 1);
1134 }
1135
1136 void mvs_port_deformed(struct asd_sas_phy *sas_phy)
1137 {
1138         mvs_port_notify_deformed(sas_phy, 1);
1139 }
1140
1141 static struct mvs_device *mvs_alloc_dev(struct mvs_info *mvi)
1142 {
1143         u32 dev;
1144         for (dev = 0; dev < MVS_MAX_DEVICES; dev++) {
1145                 if (mvi->devices[dev].dev_type == SAS_PHY_UNUSED) {
1146                         mvi->devices[dev].device_id = dev;
1147                         return &mvi->devices[dev];
1148                 }
1149         }
1150
1151         if (dev == MVS_MAX_DEVICES)
1152                 mv_printk("max support %d devices, ignore ..\n",
1153                         MVS_MAX_DEVICES);
1154
1155         return NULL;
1156 }
1157
1158 static void mvs_free_dev(struct mvs_device *mvi_dev)
1159 {
1160         u32 id = mvi_dev->device_id;
1161         memset(mvi_dev, 0, sizeof(*mvi_dev));
1162         mvi_dev->device_id = id;
1163         mvi_dev->dev_type = SAS_PHY_UNUSED;
1164         mvi_dev->dev_status = MVS_DEV_NORMAL;
1165         mvi_dev->taskfileset = MVS_ID_NOT_MAPPED;
1166 }
1167
1168 static int mvs_dev_found_notify(struct domain_device *dev, int lock)
1169 {
1170         unsigned long flags = 0;
1171         int res = 0;
1172         struct mvs_info *mvi = NULL;
1173         struct domain_device *parent_dev = dev->parent;
1174         struct mvs_device *mvi_device;
1175
1176         mvi = mvs_find_dev_mvi(dev);
1177
1178         if (lock)
1179                 spin_lock_irqsave(&mvi->lock, flags);
1180
1181         mvi_device = mvs_alloc_dev(mvi);
1182         if (!mvi_device) {
1183                 res = -1;
1184                 goto found_out;
1185         }
1186         dev->lldd_dev = mvi_device;
1187         mvi_device->dev_status = MVS_DEV_NORMAL;
1188         mvi_device->dev_type = dev->dev_type;
1189         mvi_device->mvi_info = mvi;
1190         mvi_device->sas_device = dev;
1191         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
1192                 int phy_id;
1193                 u8 phy_num = parent_dev->ex_dev.num_phys;
1194                 struct ex_phy *phy;
1195                 for (phy_id = 0; phy_id < phy_num; phy_id++) {
1196                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
1197                         if (SAS_ADDR(phy->attached_sas_addr) ==
1198                                 SAS_ADDR(dev->sas_addr)) {
1199                                 mvi_device->attached_phy = phy_id;
1200                                 break;
1201                         }
1202                 }
1203
1204                 if (phy_id == phy_num) {
1205                         mv_printk("Error: no attached dev:%016llx"
1206                                 "at ex:%016llx.\n",
1207                                 SAS_ADDR(dev->sas_addr),
1208                                 SAS_ADDR(parent_dev->sas_addr));
1209                         res = -1;
1210                 }
1211         }
1212
1213 found_out:
1214         if (lock)
1215                 spin_unlock_irqrestore(&mvi->lock, flags);
1216         return res;
1217 }
1218
1219 int mvs_dev_found(struct domain_device *dev)
1220 {
1221         return mvs_dev_found_notify(dev, 1);
1222 }
1223
1224 static void mvs_dev_gone_notify(struct domain_device *dev)
1225 {
1226         unsigned long flags = 0;
1227         struct mvs_device *mvi_dev = dev->lldd_dev;
1228         struct mvs_info *mvi;
1229
1230         if (!mvi_dev) {
1231                 mv_dprintk("found dev has gone.\n");
1232                 return;
1233         }
1234
1235         mvi = mvi_dev->mvi_info;
1236
1237         spin_lock_irqsave(&mvi->lock, flags);
1238
1239         mv_dprintk("found dev[%d:%x] is gone.\n",
1240                 mvi_dev->device_id, mvi_dev->dev_type);
1241         mvs_release_task(mvi, dev);
1242         mvs_free_reg_set(mvi, mvi_dev);
1243         mvs_free_dev(mvi_dev);
1244
1245         dev->lldd_dev = NULL;
1246         mvi_dev->sas_device = NULL;
1247
1248         spin_unlock_irqrestore(&mvi->lock, flags);
1249 }
1250
1251
1252 void mvs_dev_gone(struct domain_device *dev)
1253 {
1254         mvs_dev_gone_notify(dev);
1255 }
1256
1257 /*  Standard mandates link reset for ATA  (type 0)
1258     and hard reset for SSP (type 1) , only for RECOVERY */
1259 static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
1260 {
1261         int rc;
1262         struct sas_phy *phy = sas_get_local_phy(dev);
1263         int reset_type = (dev->dev_type == SAS_SATA_DEV ||
1264                         (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1265         rc = sas_phy_reset(phy, reset_type);
1266         sas_put_local_phy(phy);
1267         msleep(2000);
1268         return rc;
1269 }
1270
1271 /* mandatory SAM-3 */
1272 int mvs_lu_reset(struct domain_device *dev, u8 *lun)
1273 {
1274         unsigned long flags;
1275         int rc = TMF_RESP_FUNC_FAILED;
1276         struct mvs_device * mvi_dev = dev->lldd_dev;
1277         struct mvs_info *mvi = mvi_dev->mvi_info;
1278
1279         mvi_dev->dev_status = MVS_DEV_EH;
1280         rc = sas_lu_reset(dev, lun);
1281         if (rc == TMF_RESP_FUNC_COMPLETE) {
1282                 spin_lock_irqsave(&mvi->lock, flags);
1283                 mvs_release_task(mvi, dev);
1284                 spin_unlock_irqrestore(&mvi->lock, flags);
1285         }
1286         /* If failed, fall-through I_T_Nexus reset */
1287         mv_printk("%s for device[%x]:rc= %d\n", __func__,
1288                         mvi_dev->device_id, rc);
1289         return rc;
1290 }
1291
1292 int mvs_I_T_nexus_reset(struct domain_device *dev)
1293 {
1294         unsigned long flags;
1295         int rc = TMF_RESP_FUNC_FAILED;
1296         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1297         struct mvs_info *mvi = mvi_dev->mvi_info;
1298
1299         if (mvi_dev->dev_status != MVS_DEV_EH)
1300                 return TMF_RESP_FUNC_COMPLETE;
1301         else
1302                 mvi_dev->dev_status = MVS_DEV_NORMAL;
1303         rc = mvs_debug_I_T_nexus_reset(dev);
1304         mv_printk("%s for device[%x]:rc= %d\n",
1305                 __func__, mvi_dev->device_id, rc);
1306
1307         spin_lock_irqsave(&mvi->lock, flags);
1308         mvs_release_task(mvi, dev);
1309         spin_unlock_irqrestore(&mvi->lock, flags);
1310
1311         return rc;
1312 }
1313 /* optional SAM-3 */
1314 int mvs_query_task(struct sas_task *task)
1315 {
1316         u32 tag;
1317         int rc = TMF_RESP_FUNC_FAILED;
1318
1319         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1320                 struct domain_device *dev = task->dev;
1321                 struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1322                 struct mvs_info *mvi = mvi_dev->mvi_info;
1323
1324                 rc = mvs_find_tag(mvi, task, &tag);
1325                 if (rc == 0) {
1326                         rc = TMF_RESP_FUNC_FAILED;
1327                         return rc;
1328                 }
1329
1330                 rc = sas_query_task(task, tag);
1331                 switch (rc) {
1332                 /* The task is still in Lun, release it then */
1333                 case TMF_RESP_FUNC_SUCC:
1334                 /* The task is not in Lun or failed, reset the phy */
1335                 case TMF_RESP_FUNC_FAILED:
1336                 case TMF_RESP_FUNC_COMPLETE:
1337                         break;
1338                 }
1339         }
1340         mv_printk("%s:rc= %d\n", __func__, rc);
1341         return rc;
1342 }
1343
1344 /*  mandatory SAM-3, still need free task/slot info */
1345 int mvs_abort_task(struct sas_task *task)
1346 {
1347         struct domain_device *dev = task->dev;
1348         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1349         struct mvs_info *mvi;
1350         int rc = TMF_RESP_FUNC_FAILED;
1351         unsigned long flags;
1352         u32 tag;
1353
1354         if (!mvi_dev) {
1355                 mv_printk("Device has removed\n");
1356                 return TMF_RESP_FUNC_FAILED;
1357         }
1358
1359         mvi = mvi_dev->mvi_info;
1360
1361         spin_lock_irqsave(&task->task_state_lock, flags);
1362         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1363                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1364                 rc = TMF_RESP_FUNC_COMPLETE;
1365                 goto out;
1366         }
1367         spin_unlock_irqrestore(&task->task_state_lock, flags);
1368         mvi_dev->dev_status = MVS_DEV_EH;
1369         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1370                 rc = mvs_find_tag(mvi, task, &tag);
1371                 if (rc == 0) {
1372                         mv_printk("No such tag in %s\n", __func__);
1373                         rc = TMF_RESP_FUNC_FAILED;
1374                         return rc;
1375                 }
1376
1377                 rc = sas_abort_task(task, tag);
1378
1379                 /* if successful, clear the task and callback forwards.*/
1380                 if (rc == TMF_RESP_FUNC_COMPLETE) {
1381                         u32 slot_no;
1382                         struct mvs_slot_info *slot;
1383
1384                         if (task->lldd_task) {
1385                                 slot = task->lldd_task;
1386                                 slot_no = (u32) (slot - mvi->slot_info);
1387                                 spin_lock_irqsave(&mvi->lock, flags);
1388                                 mvs_slot_complete(mvi, slot_no, 1);
1389                                 spin_unlock_irqrestore(&mvi->lock, flags);
1390                         }
1391                 }
1392
1393         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1394                 task->task_proto & SAS_PROTOCOL_STP) {
1395                 if (SAS_SATA_DEV == dev->dev_type) {
1396                         struct mvs_slot_info *slot = task->lldd_task;
1397                         u32 slot_idx = (u32)(slot - mvi->slot_info);
1398                         mv_dprintk("mvs_abort_task() mvi=%p task=%p "
1399                                    "slot=%p slot_idx=x%x\n",
1400                                    mvi, task, slot, slot_idx);
1401                         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1402                         mvs_slot_task_free(mvi, task, slot, slot_idx);
1403                         rc = TMF_RESP_FUNC_COMPLETE;
1404                         goto out;
1405                 }
1406
1407         }
1408 out:
1409         if (rc != TMF_RESP_FUNC_COMPLETE)
1410                 mv_printk("%s:rc= %d\n", __func__, rc);
1411         return rc;
1412 }
1413
1414 static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
1415                         u32 slot_idx, int err)
1416 {
1417         struct mvs_device *mvi_dev = task->dev->lldd_dev;
1418         struct task_status_struct *tstat = &task->task_status;
1419         struct ata_task_resp *resp = (struct ata_task_resp *)tstat->buf;
1420         int stat = SAM_STAT_GOOD;
1421
1422
1423         resp->frame_len = sizeof(struct dev_to_host_fis);
1424         memcpy(&resp->ending_fis[0],
1425                SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset),
1426                sizeof(struct dev_to_host_fis));
1427         tstat->buf_valid_size = sizeof(*resp);
1428         if (unlikely(err)) {
1429                 if (unlikely(err & CMD_ISS_STPD))
1430                         stat = SAS_OPEN_REJECT;
1431                 else
1432                         stat = SAS_PROTO_RESPONSE;
1433        }
1434
1435         return stat;
1436 }
1437
1438 static void mvs_set_sense(u8 *buffer, int len, int d_sense,
1439                 int key, int asc, int ascq)
1440 {
1441         memset(buffer, 0, len);
1442
1443         if (d_sense) {
1444                 /* Descriptor format */
1445                 if (len < 4) {
1446                         mv_printk("Length %d of sense buffer too small to "
1447                                 "fit sense %x:%x:%x", len, key, asc, ascq);
1448                 }
1449
1450                 buffer[0] = 0x72;               /* Response Code        */
1451                 if (len > 1)
1452                         buffer[1] = key;        /* Sense Key */
1453                 if (len > 2)
1454                         buffer[2] = asc;        /* ASC  */
1455                 if (len > 3)
1456                         buffer[3] = ascq;       /* ASCQ */
1457         } else {
1458                 if (len < 14) {
1459                         mv_printk("Length %d of sense buffer too small to "
1460                                 "fit sense %x:%x:%x", len, key, asc, ascq);
1461                 }
1462
1463                 buffer[0] = 0x70;               /* Response Code        */
1464                 if (len > 2)
1465                         buffer[2] = key;        /* Sense Key */
1466                 if (len > 7)
1467                         buffer[7] = 0x0a;       /* Additional Sense Length */
1468                 if (len > 12)
1469                         buffer[12] = asc;       /* ASC */
1470                 if (len > 13)
1471                         buffer[13] = ascq; /* ASCQ */
1472         }
1473
1474         return;
1475 }
1476
1477 static void mvs_fill_ssp_resp_iu(struct ssp_response_iu *iu,
1478                                 u8 key, u8 asc, u8 asc_q)
1479 {
1480         iu->datapres = SAS_DATAPRES_SENSE_DATA;
1481         iu->response_data_len = 0;
1482         iu->sense_data_len = 17;
1483         iu->status = 02;
1484         mvs_set_sense(iu->sense_data, 17, 0,
1485                         key, asc, asc_q);
1486 }
1487
1488 static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task,
1489                          u32 slot_idx)
1490 {
1491         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1492         int stat;
1493         u32 err_dw0 = le32_to_cpu(*(u32 *)slot->response);
1494         u32 err_dw1 = le32_to_cpu(*((u32 *)slot->response + 1));
1495         u32 tfs = 0;
1496         enum mvs_port_type type = PORT_TYPE_SAS;
1497
1498         if (err_dw0 & CMD_ISS_STPD)
1499                 MVS_CHIP_DISP->issue_stop(mvi, type, tfs);
1500
1501         MVS_CHIP_DISP->command_active(mvi, slot_idx);
1502
1503         stat = SAM_STAT_CHECK_CONDITION;
1504         switch (task->task_proto) {
1505         case SAS_PROTOCOL_SSP:
1506         {
1507                 stat = SAS_ABORTED_TASK;
1508                 if ((err_dw0 & NO_DEST) || err_dw1 & bit(31)) {
1509                         struct ssp_response_iu *iu = slot->response +
1510                                 sizeof(struct mvs_err_info);
1511                         mvs_fill_ssp_resp_iu(iu, NOT_READY, 0x04, 01);
1512                         sas_ssp_task_response(mvi->dev, task, iu);
1513                         stat = SAM_STAT_CHECK_CONDITION;
1514                 }
1515                 if (err_dw1 & bit(31))
1516                         mv_printk("reuse same slot, retry command.\n");
1517                 break;
1518         }
1519         case SAS_PROTOCOL_SMP:
1520                 stat = SAM_STAT_CHECK_CONDITION;
1521                 break;
1522
1523         case SAS_PROTOCOL_SATA:
1524         case SAS_PROTOCOL_STP:
1525         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
1526         {
1527                 task->ata_task.use_ncq = 0;
1528                 stat = SAS_PROTO_RESPONSE;
1529                 mvs_sata_done(mvi, task, slot_idx, err_dw0);
1530         }
1531                 break;
1532         default:
1533                 break;
1534         }
1535
1536         return stat;
1537 }
1538
1539 int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
1540 {
1541         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1542         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1543         struct sas_task *task = slot->task;
1544         struct mvs_device *mvi_dev = NULL;
1545         struct task_status_struct *tstat;
1546         struct domain_device *dev;
1547         u32 aborted;
1548
1549         void *to;
1550         enum exec_status sts;
1551
1552         if (unlikely(!task || !task->lldd_task || !task->dev))
1553                 return -1;
1554
1555         tstat = &task->task_status;
1556         dev = task->dev;
1557         mvi_dev = dev->lldd_dev;
1558
1559         spin_lock(&task->task_state_lock);
1560         task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1561         task->task_state_flags |= SAS_TASK_STATE_DONE;
1562         /* race condition*/
1563         aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED;
1564         spin_unlock(&task->task_state_lock);
1565
1566         memset(tstat, 0, sizeof(*tstat));
1567         tstat->resp = SAS_TASK_COMPLETE;
1568
1569         if (unlikely(aborted)) {
1570                 tstat->stat = SAS_ABORTED_TASK;
1571                 if (mvi_dev && mvi_dev->running_req)
1572                         mvi_dev->running_req--;
1573                 if (sas_protocol_ata(task->task_proto))
1574                         mvs_free_reg_set(mvi, mvi_dev);
1575
1576                 mvs_slot_task_free(mvi, task, slot, slot_idx);
1577                 return -1;
1578         }
1579
1580         /* when no device attaching, go ahead and complete by error handling*/
1581         if (unlikely(!mvi_dev || flags)) {
1582                 if (!mvi_dev)
1583                         mv_dprintk("port has not device.\n");
1584                 tstat->stat = SAS_PHY_DOWN;
1585                 goto out;
1586         }
1587
1588         /*
1589          * error info record present; slot->response is 32 bit aligned but may
1590          * not be 64 bit aligned, so check for zero in two 32 bit reads
1591          */
1592         if (unlikely((rx_desc & RXQ_ERR)
1593                      && (*((u32 *)slot->response)
1594                          || *(((u32 *)slot->response) + 1)))) {
1595                 mv_dprintk("port %d slot %d rx_desc %X has error info"
1596                         "%016llX.\n", slot->port->sas_port.id, slot_idx,
1597                          rx_desc, get_unaligned_le64(slot->response));
1598                 tstat->stat = mvs_slot_err(mvi, task, slot_idx);
1599                 tstat->resp = SAS_TASK_COMPLETE;
1600                 goto out;
1601         }
1602
1603         switch (task->task_proto) {
1604         case SAS_PROTOCOL_SSP:
1605                 /* hw says status == 0, datapres == 0 */
1606                 if (rx_desc & RXQ_GOOD) {
1607                         tstat->stat = SAS_SAM_STAT_GOOD;
1608                         tstat->resp = SAS_TASK_COMPLETE;
1609                 }
1610                 /* response frame present */
1611                 else if (rx_desc & RXQ_RSP) {
1612                         struct ssp_response_iu *iu = slot->response +
1613                                                 sizeof(struct mvs_err_info);
1614                         sas_ssp_task_response(mvi->dev, task, iu);
1615                 } else
1616                         tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
1617                 break;
1618
1619         case SAS_PROTOCOL_SMP: {
1620                         struct scatterlist *sg_resp = &task->smp_task.smp_resp;
1621                         tstat->stat = SAS_SAM_STAT_GOOD;
1622                         to = kmap_atomic(sg_page(sg_resp));
1623                         memcpy(to + sg_resp->offset,
1624                                 slot->response + sizeof(struct mvs_err_info),
1625                                 sg_dma_len(sg_resp));
1626                         kunmap_atomic(to);
1627                         break;
1628                 }
1629
1630         case SAS_PROTOCOL_SATA:
1631         case SAS_PROTOCOL_STP:
1632         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: {
1633                         tstat->stat = mvs_sata_done(mvi, task, slot_idx, 0);
1634                         break;
1635                 }
1636
1637         default:
1638                 tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
1639                 break;
1640         }
1641         if (!slot->port->port_attached) {
1642                 mv_dprintk("port %d has removed.\n", slot->port->sas_port.id);
1643                 tstat->stat = SAS_PHY_DOWN;
1644         }
1645
1646
1647 out:
1648         if (mvi_dev && mvi_dev->running_req) {
1649                 mvi_dev->running_req--;
1650                 if (sas_protocol_ata(task->task_proto) && !mvi_dev->running_req)
1651                         mvs_free_reg_set(mvi, mvi_dev);
1652         }
1653         mvs_slot_task_free(mvi, task, slot, slot_idx);
1654         sts = tstat->stat;
1655
1656         spin_unlock(&mvi->lock);
1657         if (task->task_done)
1658                 task->task_done(task);
1659
1660         spin_lock(&mvi->lock);
1661
1662         return sts;
1663 }
1664
1665 void mvs_do_release_task(struct mvs_info *mvi,
1666                 int phy_no, struct domain_device *dev)
1667 {
1668         u32 slot_idx;
1669         struct mvs_phy *phy;
1670         struct mvs_port *port;
1671         struct mvs_slot_info *slot, *slot2;
1672
1673         phy = &mvi->phy[phy_no];
1674         port = phy->port;
1675         if (!port)
1676                 return;
1677         /* clean cmpl queue in case request is already finished */
1678         mvs_int_rx(mvi, false);
1679
1680
1681
1682         list_for_each_entry_safe(slot, slot2, &port->list, entry) {
1683                 struct sas_task *task;
1684                 slot_idx = (u32) (slot - mvi->slot_info);
1685                 task = slot->task;
1686
1687                 if (dev && task->dev != dev)
1688                         continue;
1689
1690                 mv_printk("Release slot [%x] tag[%x], task [%p]:\n",
1691                         slot_idx, slot->slot_tag, task);
1692                 MVS_CHIP_DISP->command_active(mvi, slot_idx);
1693
1694                 mvs_slot_complete(mvi, slot_idx, 1);
1695         }
1696 }
1697
1698 void mvs_release_task(struct mvs_info *mvi,
1699                       struct domain_device *dev)
1700 {
1701         int i, phyno[WIDE_PORT_MAX_PHY], num;
1702         num = mvs_find_dev_phyno(dev, phyno);
1703         for (i = 0; i < num; i++)
1704                 mvs_do_release_task(mvi, phyno[i], dev);
1705 }
1706
1707 static void mvs_phy_disconnected(struct mvs_phy *phy)
1708 {
1709         phy->phy_attached = 0;
1710         phy->att_dev_info = 0;
1711         phy->att_dev_sas_addr = 0;
1712 }
1713
1714 static void mvs_work_queue(struct work_struct *work)
1715 {
1716         struct delayed_work *dw = container_of(work, struct delayed_work, work);
1717         struct mvs_wq *mwq = container_of(dw, struct mvs_wq, work_q);
1718         struct mvs_info *mvi = mwq->mvi;
1719         unsigned long flags;
1720         u32 phy_no = (unsigned long) mwq->data;
1721         struct mvs_phy *phy = &mvi->phy[phy_no];
1722         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1723
1724         spin_lock_irqsave(&mvi->lock, flags);
1725         if (mwq->handler & PHY_PLUG_EVENT) {
1726
1727                 if (phy->phy_event & PHY_PLUG_OUT) {
1728                         u32 tmp;
1729
1730                         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no);
1731                         phy->phy_event &= ~PHY_PLUG_OUT;
1732                         if (!(tmp & PHY_READY_MASK)) {
1733                                 sas_phy_disconnected(sas_phy);
1734                                 mvs_phy_disconnected(phy);
1735                                 sas_notify_phy_event(sas_phy,
1736                                         PHYE_LOSS_OF_SIGNAL, GFP_ATOMIC);
1737                                 mv_dprintk("phy%d Removed Device\n", phy_no);
1738                         } else {
1739                                 MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1740                                 mvs_update_phyinfo(mvi, phy_no, 1);
1741                                 mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC);
1742                                 mvs_port_notify_formed(sas_phy, 0);
1743                                 mv_dprintk("phy%d Attached Device\n", phy_no);
1744                         }
1745                 }
1746         } else if (mwq->handler & EXP_BRCT_CHG) {
1747                 phy->phy_event &= ~EXP_BRCT_CHG;
1748                 sas_notify_port_event(sas_phy,
1749                                 PORTE_BROADCAST_RCVD, GFP_ATOMIC);
1750                 mv_dprintk("phy%d Got Broadcast Change\n", phy_no);
1751         }
1752         list_del(&mwq->entry);
1753         spin_unlock_irqrestore(&mvi->lock, flags);
1754         kfree(mwq);
1755 }
1756
1757 static int mvs_handle_event(struct mvs_info *mvi, void *data, int handler)
1758 {
1759         struct mvs_wq *mwq;
1760         int ret = 0;
1761
1762         mwq = kmalloc(sizeof(struct mvs_wq), GFP_ATOMIC);
1763         if (mwq) {
1764                 mwq->mvi = mvi;
1765                 mwq->data = data;
1766                 mwq->handler = handler;
1767                 MV_INIT_DELAYED_WORK(&mwq->work_q, mvs_work_queue, mwq);
1768                 list_add_tail(&mwq->entry, &mvi->wq_list);
1769                 schedule_delayed_work(&mwq->work_q, HZ * 2);
1770         } else
1771                 ret = -ENOMEM;
1772
1773         return ret;
1774 }
1775
1776 static void mvs_sig_time_out(struct timer_list *t)
1777 {
1778         struct mvs_phy *phy = from_timer(phy, t, timer);
1779         struct mvs_info *mvi = phy->mvi;
1780         u8 phy_no;
1781
1782         for (phy_no = 0; phy_no < mvi->chip->n_phy; phy_no++) {
1783                 if (&mvi->phy[phy_no] == phy) {
1784                         mv_dprintk("Get signature time out, reset phy %d\n",
1785                                 phy_no+mvi->id*mvi->chip->n_phy);
1786                         MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_HARD_RESET);
1787                 }
1788         }
1789 }
1790
1791 void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
1792 {
1793         u32 tmp;
1794         struct mvs_phy *phy = &mvi->phy[phy_no];
1795
1796         phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, phy_no);
1797         MVS_CHIP_DISP->write_port_irq_stat(mvi, phy_no, phy->irq_status);
1798         mv_dprintk("phy %d ctrl sts=0x%08X.\n", phy_no+mvi->id*mvi->chip->n_phy,
1799                 MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no));
1800         mv_dprintk("phy %d irq sts = 0x%08X\n", phy_no+mvi->id*mvi->chip->n_phy,
1801                 phy->irq_status);
1802
1803         /*
1804         * events is port event now ,
1805         * we need check the interrupt status which belongs to per port.
1806         */
1807
1808         if (phy->irq_status & PHYEV_DCDR_ERR) {
1809                 mv_dprintk("phy %d STP decoding error.\n",
1810                 phy_no + mvi->id*mvi->chip->n_phy);
1811         }
1812
1813         if (phy->irq_status & PHYEV_POOF) {
1814                 mdelay(500);
1815                 if (!(phy->phy_event & PHY_PLUG_OUT)) {
1816                         int dev_sata = phy->phy_type & PORT_TYPE_SATA;
1817                         int ready;
1818                         mvs_do_release_task(mvi, phy_no, NULL);
1819                         phy->phy_event |= PHY_PLUG_OUT;
1820                         MVS_CHIP_DISP->clear_srs_irq(mvi, 0, 1);
1821                         mvs_handle_event(mvi,
1822                                 (void *)(unsigned long)phy_no,
1823                                 PHY_PLUG_EVENT);
1824                         ready = mvs_is_phy_ready(mvi, phy_no);
1825                         if (ready || dev_sata) {
1826                                 if (MVS_CHIP_DISP->stp_reset)
1827                                         MVS_CHIP_DISP->stp_reset(mvi,
1828                                                         phy_no);
1829                                 else
1830                                         MVS_CHIP_DISP->phy_reset(mvi,
1831                                                         phy_no, MVS_SOFT_RESET);
1832                                 return;
1833                         }
1834                 }
1835         }
1836
1837         if (phy->irq_status & PHYEV_COMWAKE) {
1838                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, phy_no);
1839                 MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
1840                                         tmp | PHYEV_SIG_FIS);
1841                 if (phy->timer.function == NULL) {
1842                         phy->timer.function = mvs_sig_time_out;
1843                         phy->timer.expires = jiffies + 5*HZ;
1844                         add_timer(&phy->timer);
1845                 }
1846         }
1847         if (phy->irq_status & (PHYEV_SIG_FIS | PHYEV_ID_DONE)) {
1848                 phy->phy_status = mvs_is_phy_ready(mvi, phy_no);
1849                 mv_dprintk("notify plug in on phy[%d]\n", phy_no);
1850                 if (phy->phy_status) {
1851                         mdelay(10);
1852                         MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1853                         if (phy->phy_type & PORT_TYPE_SATA) {
1854                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(
1855                                                 mvi, phy_no);
1856                                 tmp &= ~PHYEV_SIG_FIS;
1857                                 MVS_CHIP_DISP->write_port_irq_mask(mvi,
1858                                                         phy_no, tmp);
1859                         }
1860                         mvs_update_phyinfo(mvi, phy_no, 0);
1861                         if (phy->phy_type & PORT_TYPE_SAS) {
1862                                 MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_PHY_TUNE);
1863                                 mdelay(10);
1864                         }
1865
1866                         mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC);
1867                         /* whether driver is going to handle hot plug */
1868                         if (phy->phy_event & PHY_PLUG_OUT) {
1869                                 mvs_port_notify_formed(&phy->sas_phy, 0);
1870                                 phy->phy_event &= ~PHY_PLUG_OUT;
1871                         }
1872                 } else {
1873                         mv_dprintk("plugin interrupt but phy%d is gone\n",
1874                                 phy_no + mvi->id*mvi->chip->n_phy);
1875                 }
1876         } else if (phy->irq_status & PHYEV_BROAD_CH) {
1877                 mv_dprintk("phy %d broadcast change.\n",
1878                         phy_no + mvi->id*mvi->chip->n_phy);
1879                 mvs_handle_event(mvi, (void *)(unsigned long)phy_no,
1880                                 EXP_BRCT_CHG);
1881         }
1882 }
1883
1884 int mvs_int_rx(struct mvs_info *mvi, bool self_clear)
1885 {
1886         u32 rx_prod_idx, rx_desc;
1887         bool attn = false;
1888
1889         /* the first dword in the RX ring is special: it contains
1890          * a mirror of the hardware's RX producer index, so that
1891          * we don't have to stall the CPU reading that register.
1892          * The actual RX ring is offset by one dword, due to this.
1893          */
1894         rx_prod_idx = mvi->rx_cons;
1895         mvi->rx_cons = le32_to_cpu(mvi->rx[0]);
1896         if (mvi->rx_cons == 0xfff)      /* h/w hasn't touched RX ring yet */
1897                 return 0;
1898
1899         /* The CMPL_Q may come late, read from register and try again
1900         * note: if coalescing is enabled,
1901         * it will need to read from register every time for sure
1902         */
1903         if (unlikely(mvi->rx_cons == rx_prod_idx))
1904                 mvi->rx_cons = MVS_CHIP_DISP->rx_update(mvi) & RX_RING_SZ_MASK;
1905
1906         if (mvi->rx_cons == rx_prod_idx)
1907                 return 0;
1908
1909         while (mvi->rx_cons != rx_prod_idx) {
1910                 /* increment our internal RX consumer pointer */
1911                 rx_prod_idx = (rx_prod_idx + 1) & (MVS_RX_RING_SZ - 1);
1912                 rx_desc = le32_to_cpu(mvi->rx[rx_prod_idx + 1]);
1913
1914                 if (likely(rx_desc & RXQ_DONE))
1915                         mvs_slot_complete(mvi, rx_desc, 0);
1916                 if (rx_desc & RXQ_ATTN) {
1917                         attn = true;
1918                 } else if (rx_desc & RXQ_ERR) {
1919                         if (!(rx_desc & RXQ_DONE))
1920                                 mvs_slot_complete(mvi, rx_desc, 0);
1921                 } else if (rx_desc & RXQ_SLOT_RESET) {
1922                         mvs_slot_free(mvi, rx_desc);
1923                 }
1924         }
1925
1926         if (attn && self_clear)
1927                 MVS_CHIP_DISP->int_full(mvi);
1928         return 0;
1929 }
1930
1931 int mvs_gpio_write(struct sas_ha_struct *sha, u8 reg_type, u8 reg_index,
1932                         u8 reg_count, u8 *write_data)
1933 {
1934         struct mvs_prv_info *mvs_prv = sha->lldd_ha;
1935         struct mvs_info *mvi = mvs_prv->mvi[0];
1936
1937         if (MVS_CHIP_DISP->gpio_write) {
1938                 return MVS_CHIP_DISP->gpio_write(mvs_prv, reg_type,
1939                         reg_index, reg_count, write_data);
1940         }
1941
1942         return -ENOSYS;
1943 }