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