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. <[email protected]>
   7  * Copyright 2009-2011 Marvell. <[email protected]>
   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 static void mvs_tag_clear(struct mvs_info *mvi, u32 tag)
  24 {
  25         void *bitmap = mvi->rsvd_tags;
  26         clear_bit(tag, bitmap);
  27 }
  28
  29 static void mvs_tag_free(struct mvs_info *mvi, u32 tag)
  30 {
  31         if (tag >= MVS_RSVD_SLOTS)
  32                 return;
  33
  34         mvs_tag_clear(mvi, tag);
  35 }
  36
  37 static void mvs_tag_set(struct mvs_info *mvi, unsigned int tag)
  38 {
  39         void *bitmap = mvi->rsvd_tags;
  40         set_bit(tag, bitmap);
  41 }
  42
  43 static int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out)
  44 {
  45         unsigned int index, tag;
  46         void *bitmap = mvi->rsvd_tags;
  47
  48         index = find_first_zero_bit(bitmap, MVS_RSVD_SLOTS);
  49         tag = index;
  50         if (tag >= MVS_RSVD_SLOTS)
  51                 return -SAS_QUEUE_FULL;
  52         mvs_tag_set(mvi, tag);
  53         *tag_out = tag;
  54         return 0;
  55 }
  56
  57 static struct mvs_info *mvs_find_dev_mvi(struct domain_device *dev)
  58 {
  59         unsigned long i = 0, j = 0, hi = 0;
  60         struct sas_ha_struct *sha = dev->port->ha;
  61         struct mvs_info *mvi = NULL;
  62         struct asd_sas_phy *phy;
  63
  64         while (sha->sas_port[i]) {
  65                 if (sha->sas_port[i] == dev->port) {
  66                         spin_lock(&sha->sas_port[i]->phy_list_lock);
  67                         phy =  container_of(sha->sas_port[i]->phy_list.next,
  68                                 struct asd_sas_phy, port_phy_el);
  69                         spin_unlock(&sha->sas_port[i]->phy_list_lock);
  70                         j = 0;
  71                         while (sha->sas_phy[j]) {
  72                                 if (sha->sas_phy[j] == phy)
  73                                         break;
  74                                 j++;
  75                         }
  76                         break;
  77                 }
  78                 i++;
  79         }
  80         hi = j/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
  81         mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
  82
  83         return mvi;
  84
  85 }
  86
  87 static int mvs_find_dev_phyno(struct domain_device *dev, int *phyno)
  88 {
  89         unsigned long i = 0, j = 0, n = 0, num = 0;
  90         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
  91         struct mvs_info *mvi = mvi_dev->mvi_info;
  92         struct sas_ha_struct *sha = dev->port->ha;
  93
  94         while (sha->sas_port[i]) {
  95                 if (sha->sas_port[i] == dev->port) {
  96                         struct asd_sas_phy *phy;
  97
  98                         spin_lock(&sha->sas_port[i]->phy_list_lock);
  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                         spin_unlock(&sha->sas_port[i]->phy_list_lock);
 113                         break;
 114                 }
 115                 i++;
 116         }
 117         return num;
 118 }
 119
 120 struct mvs_device *mvs_find_dev_by_reg_set(struct mvs_info *mvi,
 121                                                 u8 reg_set)
 122 {
 123         u32 dev_no;
 124         for (dev_no = 0; dev_no < MVS_MAX_DEVICES; dev_no++) {
 125                 if (mvi->devices[dev_no].taskfileset == MVS_ID_NOT_MAPPED)
 126                         continue;
 127
 128                 if (mvi->devices[dev_no].taskfileset == reg_set)
 129                         return &mvi->devices[dev_no];
 130         }
 131         return NULL;
 132 }
 133
 134 static inline void mvs_free_reg_set(struct mvs_info *mvi,
 135                                 struct mvs_device *dev)
 136 {
 137         if (!dev) {
 138                 mv_printk("device has been free.\n");
 139                 return;
 140         }
 141         if (dev->taskfileset == MVS_ID_NOT_MAPPED)
 142                 return;
 143         MVS_CHIP_DISP->free_reg_set(mvi, &dev->taskfileset);
 144 }
 145
 146 static inline u8 mvs_assign_reg_set(struct mvs_info *mvi,
 147                                 struct mvs_device *dev)
 148 {
 149         if (dev->taskfileset != MVS_ID_NOT_MAPPED)
 150                 return 0;
 151         return MVS_CHIP_DISP->assign_reg_set(mvi, &dev->taskfileset);
 152 }
 153
 154 void mvs_phys_reset(struct mvs_info *mvi, u32 phy_mask, int hard)
 155 {
 156         u32 no;
 157         for_each_phy(phy_mask, phy_mask, no) {
 158                 if (!(phy_mask & 1))
 159                         continue;
 160                 MVS_CHIP_DISP->phy_reset(mvi, no, hard);
 161         }
 162 }
 163
 164 int mvs_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 165                         void *funcdata)
 166 {
 167         int rc = 0, phy_id = sas_phy->id;
 168         u32 tmp, i = 0, hi;
 169         struct sas_ha_struct *sha = sas_phy->ha;
 170         struct mvs_info *mvi = NULL;
 171
 172         while (sha->sas_phy[i]) {
 173                 if (sha->sas_phy[i] == sas_phy)
 174                         break;
 175                 i++;
 176         }
 177         hi = i/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
 178         mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
 179
 180         switch (func) {
 181         case PHY_FUNC_SET_LINK_RATE:
 182                 MVS_CHIP_DISP->phy_set_link_rate(mvi, phy_id, funcdata);
 183                 break;
 184
 185         case PHY_FUNC_HARD_RESET:
 186                 tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_id);
 187                 if (tmp & PHY_RST_HARD)
 188                         break;
 189                 MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_HARD_RESET);
 190                 break;
 191
 192         case PHY_FUNC_LINK_RESET:
 193                 MVS_CHIP_DISP->phy_enable(mvi, phy_id);
 194                 MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_SOFT_RESET);
 195                 break;
 196
 197         case PHY_FUNC_DISABLE:
 198                 MVS_CHIP_DISP->phy_disable(mvi, phy_id);
 199                 break;
 200         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 201         default:
 202                 rc = -ENOSYS;
 203         }
 204         msleep(200);
 205         return rc;
 206 }
 207
 208 void mvs_set_sas_addr(struct mvs_info *mvi, int port_id, u32 off_lo,
 209                       u32 off_hi, u64 sas_addr)
 210 {
 211         u32 lo = (u32)sas_addr;
 212         u32 hi = (u32)(sas_addr>>32);
 213
 214         MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_lo);
 215         MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, lo);
 216         MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_hi);
 217         MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, hi);
 218 }
 219
 220 static void mvs_bytes_dmaed(struct mvs_info *mvi, int i, gfp_t gfp_flags)
 221 {
 222         struct mvs_phy *phy = &mvi->phy[i];
 223         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 224
 225         if (!phy->phy_attached)
 226                 return;
 227
 228         if (!(phy->att_dev_info & PORT_DEV_TRGT_MASK)
 229                 && phy->phy_type & PORT_TYPE_SAS) {
 230                 return;
 231         }
 232
 233         sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
 234
 235         if (sas_phy->phy) {
 236                 struct sas_phy *sphy = sas_phy->phy;
 237
 238                 sphy->negotiated_linkrate = sas_phy->linkrate;
 239                 sphy->minimum_linkrate = phy->minimum_linkrate;
 240                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 241                 sphy->maximum_linkrate = phy->maximum_linkrate;
 242                 sphy->maximum_linkrate_hw = MVS_CHIP_DISP->phy_max_link_rate();
 243         }
 244
 245         if (phy->phy_type & PORT_TYPE_SAS) {
 246                 struct sas_identify_frame *id;
 247
 248                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 249                 id->dev_type = phy->identify.device_type;
 250                 id->initiator_bits = SAS_PROTOCOL_ALL;
 251                 id->target_bits = phy->identify.target_port_protocols;
 252
 253                 /* direct attached SAS device */
 254                 if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
 255                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
 256                         MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x00);
 257                 }
 258         } else if (phy->phy_type & PORT_TYPE_SATA) {
 259                 /*Nothing*/
 260         }
 261         mv_dprintk("phy %d byte dmaded.\n", i + mvi->id * mvi->chip->n_phy);
 262
 263         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 264
 265         sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
 266 }
 267
 268 void mvs_scan_start(struct Scsi_Host *shost)
 269 {
 270         int i, j;
 271         unsigned short core_nr;
 272         struct mvs_info *mvi;
 273         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 274         struct mvs_prv_info *mvs_prv = sha->lldd_ha;
 275
 276         core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host;
 277
 278         for (j = 0; j < core_nr; j++) {
 279                 mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[j];
 280                 for (i = 0; i < mvi->chip->n_phy; ++i)
 281                         mvs_bytes_dmaed(mvi, i, GFP_KERNEL);
 282         }
 283         mvs_prv->scan_finished = 1;
 284 }
 285
 286 int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time)
 287 {
 288         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 289         struct mvs_prv_info *mvs_prv = sha->lldd_ha;
 290
 291         if (mvs_prv->scan_finished == 0)
 292                 return 0;
 293
 294         sas_drain_work(sha);
 295         return 1;
 296 }
 297
 298 static int mvs_task_prep_smp(struct mvs_info *mvi,
 299                              struct mvs_task_exec_info *tei)
 300 {
 301         int elem, rc, i;
 302         struct sas_ha_struct *sha = mvi->sas;
 303         struct sas_task *task = tei->task;
 304         struct mvs_cmd_hdr *hdr = tei->hdr;
 305         struct domain_device *dev = task->dev;
 306         struct asd_sas_port *sas_port = dev->port;
 307         struct sas_phy *sphy = dev->phy;
 308         struct asd_sas_phy *sas_phy = sha->sas_phy[sphy->number];
 309         struct scatterlist *sg_req, *sg_resp;
 310         u32 req_len, resp_len, tag = tei->tag;
 311         void *buf_tmp;
 312         u8 *buf_oaf;
 313         dma_addr_t buf_tmp_dma;
 314         void *buf_prd;
 315         struct mvs_slot_info *slot = &mvi->slot_info[tag];
 316         u32 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 317
 318         /*
 319          * DMA-map SMP request, response buffers
 320          */
 321         sg_req = &task->smp_task.smp_req;
 322         elem = dma_map_sg(mvi->dev, sg_req, 1, DMA_TO_DEVICE);
 323         if (!elem)
 324                 return -ENOMEM;
 325         req_len = sg_dma_len(sg_req);
 326
 327         sg_resp = &task->smp_task.smp_resp;
 328         elem = dma_map_sg(mvi->dev, sg_resp, 1, DMA_FROM_DEVICE);
 329         if (!elem) {
 330                 rc = -ENOMEM;
 331                 goto err_out;
 332         }
 333         resp_len = SB_RFB_MAX;
 334
 335         /* must be in dwords */
 336         if ((req_len & 0x3) || (resp_len & 0x3)) {
 337                 rc = -EINVAL;
 338                 goto err_out_2;
 339         }
 340
 341         /*
 342          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 343          */
 344
 345         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ***** */
 346         buf_tmp = slot->buf;
 347         buf_tmp_dma = slot->buf_dma;
 348
 349         hdr->cmd_tbl = cpu_to_le64(sg_dma_address(sg_req));
 350
 351         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 352         buf_oaf = buf_tmp;
 353         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 354
 355         buf_tmp += MVS_OAF_SZ;
 356         buf_tmp_dma += MVS_OAF_SZ;
 357
 358         /* region 3: PRD table *********************************** */
 359         buf_prd = buf_tmp;
 360         if (tei->n_elem)
 361                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 362         else
 363                 hdr->prd_tbl = 0;
 364
 365         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 366         buf_tmp += i;
 367         buf_tmp_dma += i;
 368
 369         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 370         slot->response = buf_tmp;
 371         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 372         if (mvi->flags & MVF_FLAG_SOC)
 373                 hdr->reserved[0] = 0;
 374
 375         /*
 376          * Fill in TX ring and command slot header
 377          */
 378         slot->tx = mvi->tx_prod;
 379         mvi->tx[mvi->tx_prod] = cpu_to_le32((TXQ_CMD_SMP << TXQ_CMD_SHIFT) |
 380                                         TXQ_MODE_I | tag |
 381                                         (MVS_PHY_ID << TXQ_PHY_SHIFT));
 382
 383         hdr->flags |= flags;
 384         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | ((req_len - 4) / 4));
 385         hdr->tags = cpu_to_le32(tag);
 386         hdr->data_len = 0;
 387
 388         /* generate open address frame hdr (first 12 bytes) */
 389         /* initiator, SMP, ftype 1h */
 390         buf_oaf[0] = (1 << 7) | (PROTOCOL_SMP << 4) | 0x01;
 391         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 392         *(u16 *)(buf_oaf + 2) = 0xFFFF;         /* SAS SPEC */
 393         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 394
 395         /* fill in PRD (scatter/gather) table, if any */
 396         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 397
 398         return 0;
 399
 400 err_out_2:
 401         dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_resp, 1,
 402                      DMA_FROM_DEVICE);
 403 err_out:
 404         dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_req, 1,
 405                      DMA_TO_DEVICE);
 406         return rc;
 407 }
 408
 409 static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag)
 410 {
 411         struct ata_queued_cmd *qc = task->uldd_task;
 412
 413         if (qc) {
 414                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 415                     qc->tf.command == ATA_CMD_FPDMA_READ ||
 416                     qc->tf.command == ATA_CMD_FPDMA_RECV ||
 417                     qc->tf.command == ATA_CMD_FPDMA_SEND ||
 418                     qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
 419                         *tag = qc->tag;
 420                         return 1;
 421                 }
 422         }
 423
 424         return 0;
 425 }
 426
 427 static int mvs_task_prep_ata(struct mvs_info *mvi,
 428                              struct mvs_task_exec_info *tei)
 429 {
 430         struct sas_task *task = tei->task;
 431         struct domain_device *dev = task->dev;
 432         struct mvs_device *mvi_dev = dev->lldd_dev;
 433         struct mvs_cmd_hdr *hdr = tei->hdr;
 434         struct asd_sas_port *sas_port = dev->port;
 435         struct mvs_slot_info *slot;
 436         void *buf_prd;
 437         u32 tag = tei->tag, hdr_tag;
 438         u32 flags, del_q;
 439         void *buf_tmp;
 440         u8 *buf_cmd, *buf_oaf;
 441         dma_addr_t buf_tmp_dma;
 442         u32 i, req_len, resp_len;
 443         const u32 max_resp_len = SB_RFB_MAX;
 444
 445         if (mvs_assign_reg_set(mvi, mvi_dev) == MVS_ID_NOT_MAPPED) {
 446                 mv_dprintk("Have not enough regiset for dev %d.\n",
 447                         mvi_dev->device_id);
 448                 return -EBUSY;
 449         }
 450         slot = &mvi->slot_info[tag];
 451         slot->tx = mvi->tx_prod;
 452         del_q = TXQ_MODE_I | tag |
 453                 (TXQ_CMD_STP << TXQ_CMD_SHIFT) |
 454                 ((sas_port->phy_mask & TXQ_PHY_MASK) << TXQ_PHY_SHIFT) |
 455                 (mvi_dev->taskfileset << TXQ_SRS_SHIFT);
 456         mvi->tx[mvi->tx_prod] = cpu_to_le32(del_q);
 457
 458         if (task->data_dir == DMA_FROM_DEVICE)
 459                 flags = (MVS_CHIP_DISP->prd_count() << MCH_PRD_LEN_SHIFT);
 460         else
 461                 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 462
 463         if (task->ata_task.use_ncq)
 464                 flags |= MCH_FPDMA;
 465         if (dev->sata_dev.class == ATA_DEV_ATAPI) {
 466                 if (task->ata_task.fis.command != ATA_CMD_ID_ATAPI)
 467                         flags |= MCH_ATAPI;
 468         }
 469
 470         hdr->flags = cpu_to_le32(flags);
 471
 472         if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr_tag))
 473                 task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3);
 474         else
 475                 hdr_tag = tag;
 476
 477         hdr->tags = cpu_to_le32(hdr_tag);
 478
 479         hdr->data_len = cpu_to_le32(task->total_xfer_len);
 480
 481         /*
 482          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 483          */
 484
 485         /* region 1: command table area (MVS_ATA_CMD_SZ bytes) ************** */
 486         buf_cmd = buf_tmp = slot->buf;
 487         buf_tmp_dma = slot->buf_dma;
 488
 489         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 490
 491         buf_tmp += MVS_ATA_CMD_SZ;
 492         buf_tmp_dma += MVS_ATA_CMD_SZ;
 493
 494         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 495         /* used for STP.  unused for SATA? */
 496         buf_oaf = buf_tmp;
 497         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 498
 499         buf_tmp += MVS_OAF_SZ;
 500         buf_tmp_dma += MVS_OAF_SZ;
 501
 502         /* region 3: PRD table ********************************************* */
 503         buf_prd = buf_tmp;
 504
 505         if (tei->n_elem)
 506                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 507         else
 508                 hdr->prd_tbl = 0;
 509         i = MVS_CHIP_DISP->prd_size() * MVS_CHIP_DISP->prd_count();
 510
 511         buf_tmp += i;
 512         buf_tmp_dma += i;
 513
 514         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 515         slot->response = buf_tmp;
 516         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 517         if (mvi->flags & MVF_FLAG_SOC)
 518                 hdr->reserved[0] = 0;
 519
 520         req_len = sizeof(struct host_to_dev_fis);
 521         resp_len = MVS_SLOT_BUF_SZ - MVS_ATA_CMD_SZ -
 522             sizeof(struct mvs_err_info) - i;
 523
 524         /* request, response lengths */
 525         resp_len = min(resp_len, max_resp_len);
 526         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 527
 528         if (likely(!task->ata_task.device_control_reg_update))
 529                 task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
 530         /* fill in command FIS and ATAPI CDB */
 531         memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
 532         if (dev->sata_dev.class == ATA_DEV_ATAPI)
 533                 memcpy(buf_cmd + STP_ATAPI_CMD,
 534                         task->ata_task.atapi_packet, 16);
 535
 536         /* generate open address frame hdr (first 12 bytes) */
 537         /* initiator, STP, ftype 1h */
 538         buf_oaf[0] = (1 << 7) | (PROTOCOL_STP << 4) | 0x1;
 539         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 540         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 541         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 542
 543         /* fill in PRD (scatter/gather) table, if any */
 544         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 545
 546         if (task->data_dir == DMA_FROM_DEVICE)
 547                 MVS_CHIP_DISP->dma_fix(mvi, sas_port->phy_mask,
 548                                 TRASH_BUCKET_SIZE, tei->n_elem, buf_prd);
 549
 550         return 0;
 551 }
 552
 553 static int mvs_task_prep_ssp(struct mvs_info *mvi,
 554                              struct mvs_task_exec_info *tei, int is_tmf,
 555                              struct sas_tmf_task *tmf)
 556 {
 557         struct sas_task *task = tei->task;
 558         struct mvs_cmd_hdr *hdr = tei->hdr;
 559         struct mvs_port *port = tei->port;
 560         struct domain_device *dev = task->dev;
 561         struct mvs_device *mvi_dev = dev->lldd_dev;
 562         struct asd_sas_port *sas_port = dev->port;
 563         struct mvs_slot_info *slot;
 564         void *buf_prd;
 565         struct ssp_frame_hdr *ssp_hdr;
 566         void *buf_tmp;
 567         u8 *buf_cmd, *buf_oaf;
 568         dma_addr_t buf_tmp_dma;
 569         u32 flags;
 570         u32 resp_len, req_len, i, tag = tei->tag;
 571         const u32 max_resp_len = SB_RFB_MAX;
 572         u32 phy_mask;
 573
 574         slot = &mvi->slot_info[tag];
 575
 576         phy_mask = ((port->wide_port_phymap) ? port->wide_port_phymap :
 577                 sas_port->phy_mask) & TXQ_PHY_MASK;
 578
 579         slot->tx = mvi->tx_prod;
 580         mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag |
 581                                 (TXQ_CMD_SSP << TXQ_CMD_SHIFT) |
 582                                 (phy_mask << TXQ_PHY_SHIFT));
 583
 584         flags = MCH_RETRY;
 585         if (is_tmf)
 586                 flags |= (MCH_SSP_FR_TASK << MCH_SSP_FR_TYPE_SHIFT);
 587         else
 588                 flags |= (MCH_SSP_FR_CMD << MCH_SSP_FR_TYPE_SHIFT);
 589
 590         hdr->flags = cpu_to_le32(flags | (tei->n_elem << MCH_PRD_LEN_SHIFT));
 591         hdr->tags = cpu_to_le32(tag);
 592         hdr->data_len = cpu_to_le32(task->total_xfer_len);
 593
 594         /*
 595          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 596          */
 597
 598         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ************** */
 599         buf_cmd = buf_tmp = slot->buf;
 600         buf_tmp_dma = slot->buf_dma;
 601
 602         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 603
 604         buf_tmp += MVS_SSP_CMD_SZ;
 605         buf_tmp_dma += MVS_SSP_CMD_SZ;
 606
 607         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 608         buf_oaf = buf_tmp;
 609         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 610
 611         buf_tmp += MVS_OAF_SZ;
 612         buf_tmp_dma += MVS_OAF_SZ;
 613
 614         /* region 3: PRD table ********************************************* */
 615         buf_prd = buf_tmp;
 616         if (tei->n_elem)
 617                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 618         else
 619                 hdr->prd_tbl = 0;
 620
 621         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 622         buf_tmp += i;
 623         buf_tmp_dma += i;
 624
 625         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 626         slot->response = buf_tmp;
 627         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 628         if (mvi->flags & MVF_FLAG_SOC)
 629                 hdr->reserved[0] = 0;
 630
 631         resp_len = MVS_SLOT_BUF_SZ - MVS_SSP_CMD_SZ - MVS_OAF_SZ -
 632             sizeof(struct mvs_err_info) - i;
 633         resp_len = min(resp_len, max_resp_len);
 634
 635         req_len = sizeof(struct ssp_frame_hdr) + 28;
 636
 637         /* request, response lengths */
 638         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 639
 640         /* generate open address frame hdr (first 12 bytes) */
 641         /* initiator, SSP, ftype 1h */
 642         buf_oaf[0] = (1 << 7) | (PROTOCOL_SSP << 4) | 0x1;
 643         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 644         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 645         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 646
 647         /* fill in SSP frame header (Command Table.SSP frame header) */
 648         ssp_hdr = (struct ssp_frame_hdr *)buf_cmd;
 649
 650         if (is_tmf)
 651                 ssp_hdr->frame_type = SSP_TASK;
 652         else
 653                 ssp_hdr->frame_type = SSP_COMMAND;
 654
 655         memcpy(ssp_hdr->hashed_dest_addr, dev->hashed_sas_addr,
 656                HASHED_SAS_ADDR_SIZE);
 657         memcpy(ssp_hdr->hashed_src_addr,
 658                dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
 659         ssp_hdr->tag = cpu_to_be16(tag);
 660
 661         /* fill in IU for TASK and Command Frame */
 662         buf_cmd += sizeof(*ssp_hdr);
 663         memcpy(buf_cmd, &task->ssp_task.LUN, 8);
 664
 665         if (ssp_hdr->frame_type != SSP_TASK) {
 666                 buf_cmd[9] = task->ssp_task.task_attr;
 667                 memcpy(buf_cmd + 12, task->ssp_task.cmd->cmnd,
 668                        task->ssp_task.cmd->cmd_len);
 669         } else{
 670                 buf_cmd[10] = tmf->tmf;
 671                 switch (tmf->tmf) {
 672                 case TMF_ABORT_TASK:
 673                 case TMF_QUERY_TASK:
 674                         buf_cmd[12] =
 675                                 (tmf->tag_of_task_to_be_managed >> 8) & 0xff;
 676                         buf_cmd[13] =
 677                                 tmf->tag_of_task_to_be_managed & 0xff;
 678                         break;
 679                 default:
 680                         break;
 681                 }
 682         }
 683         /* fill in PRD (scatter/gather) table, if any */
 684         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 685         return 0;
 686 }
 687
 688 #define DEV_IS_GONE(mvi_dev)    ((!mvi_dev || (mvi_dev->dev_type == SAS_PHY_UNUSED)))
 689 static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf,
 690                                 struct sas_tmf_task *tmf, int *pass)
 691 {
 692         struct domain_device *dev = task->dev;
 693         struct mvs_device *mvi_dev = dev->lldd_dev;
 694         struct mvs_task_exec_info tei;
 695         struct mvs_slot_info *slot;
 696         u32 tag = 0xdeadbeef, n_elem = 0;
 697         struct request *rq;
 698         int rc = 0;
 699
 700         if (!dev->port) {
 701                 struct task_status_struct *tsm = &task->task_status;
 702
 703                 tsm->resp = SAS_TASK_UNDELIVERED;
 704                 tsm->stat = SAS_PHY_DOWN;
 705                 /*
 706                  * libsas will use dev->port, should
 707                  * not call task_done for sata
 708                  */
 709                 if (dev->dev_type != SAS_SATA_DEV)
 710                         task->task_done(task);
 711                 return rc;
 712         }
 713
 714         if (DEV_IS_GONE(mvi_dev)) {
 715                 if (mvi_dev)
 716                         mv_dprintk("device %d not ready.\n",
 717                                 mvi_dev->device_id);
 718                 else
 719                         mv_dprintk("device %016llx not ready.\n",
 720                                 SAS_ADDR(dev->sas_addr));
 721
 722                 rc = SAS_PHY_DOWN;
 723                 return rc;
 724         }
 725         tei.port = dev->port->lldd_port;
 726         if (tei.port && !tei.port->port_attached && !tmf) {
 727                 if (sas_protocol_ata(task->task_proto)) {
 728                         struct task_status_struct *ts = &task->task_status;
 729                         mv_dprintk("SATA/STP port %d does not attach"
 730                                         "device.\n", dev->port->id);
 731                         ts->resp = SAS_TASK_COMPLETE;
 732                         ts->stat = SAS_PHY_DOWN;
 733
 734                         task->task_done(task);
 735
 736                 } else {
 737                         struct task_status_struct *ts = &task->task_status;
 738                         mv_dprintk("SAS port %d does not attach"
 739                                 "device.\n", dev->port->id);
 740                         ts->resp = SAS_TASK_UNDELIVERED;
 741                         ts->stat = SAS_PHY_DOWN;
 742                         task->task_done(task);
 743                 }
 744                 return rc;
 745         }
 746
 747         if (!sas_protocol_ata(task->task_proto)) {
 748                 if (task->num_scatter) {
 749                         n_elem = dma_map_sg(mvi->dev,
 750                                             task->scatter,
 751                                             task->num_scatter,
 752                                             task->data_dir);
 753                         if (!n_elem) {
 754                                 rc = -ENOMEM;
 755                                 goto prep_out;
 756                         }
 757                 }
 758         } else {
 759                 n_elem = task->num_scatter;
 760         }
 761
 762         rq = sas_task_find_rq(task);
 763         if (rq) {
 764                 tag = rq->tag + MVS_RSVD_SLOTS;
 765         } else {
 766                 rc = mvs_tag_alloc(mvi, &tag);
 767                 if (rc)
 768                         goto err_out;
 769         }
 770
 771         slot = &mvi->slot_info[tag];
 772
 773         task->lldd_task = NULL;
 774         slot->n_elem = n_elem;
 775         slot->slot_tag = tag;
 776
 777         slot->buf = dma_pool_zalloc(mvi->dma_pool, GFP_ATOMIC, &slot->buf_dma);
 778         if (!slot->buf) {
 779                 rc = -ENOMEM;
 780                 goto err_out_tag;
 781         }
 782
 783         tei.task = task;
 784         tei.hdr = &mvi->slot[tag];
 785         tei.tag = tag;
 786         tei.n_elem = n_elem;
 787         switch (task->task_proto) {
 788         case SAS_PROTOCOL_SMP:
 789                 rc = mvs_task_prep_smp(mvi, &tei);
 790                 break;
 791         case SAS_PROTOCOL_SSP:
 792                 rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf);
 793                 break;
 794         case SAS_PROTOCOL_SATA:
 795         case SAS_PROTOCOL_STP:
 796         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 797                 rc = mvs_task_prep_ata(mvi, &tei);
 798                 break;
 799         default:
 800                 dev_printk(KERN_ERR, mvi->dev,
 801                         "unknown sas_task proto: 0x%x\n",
 802                         task->task_proto);
 803                 rc = -EINVAL;
 804                 break;
 805         }
 806
 807         if (rc) {
 808                 mv_dprintk("rc is %x\n", rc);
 809                 goto err_out_slot_buf;
 810         }
 811         slot->task = task;
 812         slot->port = tei.port;
 813         task->lldd_task = slot;
 814         list_add_tail(&slot->entry, &tei.port->list);
 815
 816         mvi_dev->running_req++;
 817         ++(*pass);
 818         mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
 819
 820         return rc;
 821
 822 err_out_slot_buf:
 823         dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
 824 err_out_tag:
 825         mvs_tag_free(mvi, tag);
 826 err_out:
 827
 828         dev_printk(KERN_ERR, mvi->dev, "mvsas prep failed[%d]!\n", rc);
 829         if (!sas_protocol_ata(task->task_proto))
 830                 if (n_elem)
 831                         dma_unmap_sg(mvi->dev, task->scatter, n_elem,
 832                                      task->data_dir);
 833 prep_out:
 834         return rc;
 835 }
 836
 837 int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags)
 838 {
 839         struct mvs_info *mvi = NULL;
 840         u32 rc = 0;
 841         u32 pass = 0;
 842         unsigned long flags = 0;
 843         struct sas_tmf_task *tmf = task->tmf;
 844         int is_tmf = !!task->tmf;
 845
 846         mvi = ((struct mvs_device *)task->dev->lldd_dev)->mvi_info;
 847
 848         spin_lock_irqsave(&mvi->lock, flags);
 849         rc = mvs_task_prep(task, mvi, is_tmf, tmf, &pass);
 850         if (rc)
 851                 dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
 852
 853         if (likely(pass))
 854                         MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) &
 855                                 (MVS_CHIP_SLOT_SZ - 1));
 856         spin_unlock_irqrestore(&mvi->lock, flags);
 857
 858         return rc;
 859 }
 860
 861 static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc)
 862 {
 863         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
 864         mvs_tag_free(mvi, slot_idx);
 865 }
 866
 867 static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task,
 868                           struct mvs_slot_info *slot, u32 slot_idx)
 869 {
 870         if (!slot)
 871                 return;
 872         if (!slot->task)
 873                 return;
 874         if (!sas_protocol_ata(task->task_proto))
 875                 if (slot->n_elem)
 876                         dma_unmap_sg(mvi->dev, task->scatter,
 877                                      slot->n_elem, task->data_dir);
 878
 879         switch (task->task_proto) {
 880         case SAS_PROTOCOL_SMP:
 881                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_resp, 1,
 882                              DMA_FROM_DEVICE);
 883                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_req, 1,
 884                              DMA_TO_DEVICE);
 885                 break;
 886
 887         case SAS_PROTOCOL_SATA:
 888         case SAS_PROTOCOL_STP:
 889         case SAS_PROTOCOL_SSP:
 890         default:
 891                 /* do nothing */
 892                 break;
 893         }
 894
 895         if (slot->buf) {
 896                 dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
 897                 slot->buf = NULL;
 898         }
 899         list_del_init(&slot->entry);
 900         task->lldd_task = NULL;
 901         slot->task = NULL;
 902         slot->port = NULL;
 903         slot->slot_tag = 0xFFFFFFFF;
 904         mvs_slot_free(mvi, slot_idx);
 905 }
 906
 907 static void mvs_update_wideport(struct mvs_info *mvi, int phy_no)
 908 {
 909         struct mvs_phy *phy = &mvi->phy[phy_no];
 910         struct mvs_port *port = phy->port;
 911         int j, no;
 912
 913         for_each_phy(port->wide_port_phymap, j, no) {
 914                 if (j & 1) {
 915                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
 916                                                 PHYR_WIDE_PORT);
 917                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
 918                                                 port->wide_port_phymap);
 919                 } else {
 920                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
 921                                                 PHYR_WIDE_PORT);
 922                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
 923                                                 0);
 924                 }
 925         }
 926 }
 927
 928 static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i)
 929 {
 930         u32 tmp;
 931         struct mvs_phy *phy = &mvi->phy[i];
 932         struct mvs_port *port = phy->port;
 933
 934         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, i);
 935         if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) {
 936                 if (!port)
 937                         phy->phy_attached = 1;
 938                 return tmp;
 939         }
 940
 941         if (port) {
 942                 if (phy->phy_type & PORT_TYPE_SAS) {
 943                         port->wide_port_phymap &= ~(1U << i);
 944                         if (!port->wide_port_phymap)
 945                                 port->port_attached = 0;
 946                         mvs_update_wideport(mvi, i);
 947                 } else if (phy->phy_type & PORT_TYPE_SATA)
 948                         port->port_attached = 0;
 949                 phy->port = NULL;
 950                 phy->phy_attached = 0;
 951                 phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);
 952         }
 953         return 0;
 954 }
 955
 956 static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf)
 957 {
 958         u32 *s = (u32 *) buf;
 959
 960         if (!s)
 961                 return NULL;
 962
 963         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG3);
 964         s[3] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 965
 966         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG2);
 967         s[2] = 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_SIG1);
 970         s[1] = 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_SIG0);
 973         s[0] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 974
 975         if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01))
 976                 s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10);
 977
 978         return s;
 979 }
 980
 981 static u32 mvs_is_sig_fis_received(u32 irq_status)
 982 {
 983         return irq_status & PHYEV_SIG_FIS;
 984 }
 985
 986 static void mvs_sig_remove_timer(struct mvs_phy *phy)
 987 {
 988         if (phy->timer.function)
 989                 del_timer(&phy->timer);
 990         phy->timer.function = NULL;
 991 }
 992
 993 void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st)
 994 {
 995         struct mvs_phy *phy = &mvi->phy[i];
 996         struct sas_identify_frame *id;
 997
 998         id = (struct sas_identify_frame *)phy->frame_rcvd;
 999
1000         if (get_st) {
1001                 phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, i);
1002                 phy->phy_status = mvs_is_phy_ready(mvi, i);
1003         }
1004
1005         if (phy->phy_status) {
1006                 int oob_done = 0;
1007                 struct asd_sas_phy *sas_phy = &mvi->phy[i].sas_phy;
1008
1009                 oob_done = MVS_CHIP_DISP->oob_done(mvi, i);
1010
1011                 MVS_CHIP_DISP->fix_phy_info(mvi, i, id);
1012                 if (phy->phy_type & PORT_TYPE_SATA) {
1013                         phy->identify.target_port_protocols = SAS_PROTOCOL_STP;
1014                         if (mvs_is_sig_fis_received(phy->irq_status)) {
1015                                 mvs_sig_remove_timer(phy);
1016                                 phy->phy_attached = 1;
1017                                 phy->att_dev_sas_addr =
1018                                         i + mvi->id * mvi->chip->n_phy;
1019                                 if (oob_done)
1020                                         sas_phy->oob_mode = SATA_OOB_MODE;
1021                                 phy->frame_rcvd_size =
1022                                     sizeof(struct dev_to_host_fis);
1023                                 mvs_get_d2h_reg(mvi, i, id);
1024                         } else {
1025                                 u32 tmp;
1026                                 dev_printk(KERN_DEBUG, mvi->dev,
1027                                         "Phy%d : No sig fis\n", i);
1028                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, i);
1029                                 MVS_CHIP_DISP->write_port_irq_mask(mvi, i,
1030                                                 tmp | PHYEV_SIG_FIS);
1031                                 phy->phy_attached = 0;
1032                                 phy->phy_type &= ~PORT_TYPE_SATA;
1033                                 goto out_done;
1034                         }
1035                 }       else if (phy->phy_type & PORT_TYPE_SAS
1036                         || phy->att_dev_info & PORT_SSP_INIT_MASK) {
1037                         phy->phy_attached = 1;
1038                         phy->identify.device_type =
1039                                 phy->att_dev_info & PORT_DEV_TYPE_MASK;
1040
1041                         if (phy->identify.device_type == SAS_END_DEVICE)
1042                                 phy->identify.target_port_protocols =
1043                                                         SAS_PROTOCOL_SSP;
1044                         else if (phy->identify.device_type != SAS_PHY_UNUSED)
1045                                 phy->identify.target_port_protocols =
1046                                                         SAS_PROTOCOL_SMP;
1047                         if (oob_done)
1048                                 sas_phy->oob_mode = SAS_OOB_MODE;
1049                         phy->frame_rcvd_size =
1050                             sizeof(struct sas_identify_frame);
1051                 }
1052                 memcpy(sas_phy->attached_sas_addr,
1053                         &phy->att_dev_sas_addr, SAS_ADDR_SIZE);
1054
1055                 if (MVS_CHIP_DISP->phy_work_around)
1056                         MVS_CHIP_DISP->phy_work_around(mvi, i);
1057         }
1058         mv_dprintk("phy %d attach dev info is %x\n",
1059                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_info);
1060         mv_dprintk("phy %d attach sas addr is %llx\n",
1061                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_sas_addr);
1062 out_done:
1063         if (get_st)
1064                 MVS_CHIP_DISP->write_port_irq_stat(mvi, i, phy->irq_status);
1065 }
1066
1067 static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
1068 {
1069         struct sas_ha_struct *sas_ha = sas_phy->ha;
1070         struct mvs_info *mvi = NULL; int i = 0, hi;
1071         struct mvs_phy *phy = sas_phy->lldd_phy;
1072         struct asd_sas_port *sas_port = sas_phy->port;
1073         struct mvs_port *port;
1074         unsigned long flags = 0;
1075         if (!sas_port)
1076                 return;
1077
1078         while (sas_ha->sas_phy[i]) {
1079                 if (sas_ha->sas_phy[i] == sas_phy)
1080                         break;
1081                 i++;
1082         }
1083         hi = i/((struct mvs_prv_info *)sas_ha->lldd_ha)->n_phy;
1084         mvi = ((struct mvs_prv_info *)sas_ha->lldd_ha)->mvi[hi];
1085         if (i >= mvi->chip->n_phy)
1086                 port = &mvi->port[i - mvi->chip->n_phy];
1087         else
1088                 port = &mvi->port[i];
1089         if (lock)
1090                 spin_lock_irqsave(&mvi->lock, flags);
1091         port->port_attached = 1;
1092         phy->port = port;
1093         sas_port->lldd_port = port;
1094         if (phy->phy_type & PORT_TYPE_SAS) {
1095                 port->wide_port_phymap = sas_port->phy_mask;
1096                 mv_printk("set wide port phy map %x\n", sas_port->phy_mask);
1097                 mvs_update_wideport(mvi, sas_phy->id);
1098
1099                 /* direct attached SAS device */
1100                 if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
1101                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
1102                         MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x04);
1103                 }
1104         }
1105         if (lock)
1106                 spin_unlock_irqrestore(&mvi->lock, flags);
1107 }
1108
1109 static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock)
1110 {
1111         struct domain_device *dev;
1112         struct mvs_phy *phy = sas_phy->lldd_phy;
1113         struct mvs_info *mvi = phy->mvi;
1114         struct asd_sas_port *port = sas_phy->port;
1115         int phy_no = 0;
1116
1117         while (phy != &mvi->phy[phy_no]) {
1118                 phy_no++;
1119                 if (phy_no >= MVS_MAX_PHYS)
1120                         return;
1121         }
1122         list_for_each_entry(dev, &port->dev_list, dev_list_node)
1123                 mvs_do_release_task(phy->mvi, phy_no, dev);
1124
1125 }
1126
1127
1128 void mvs_port_formed(struct asd_sas_phy *sas_phy)
1129 {
1130         mvs_port_notify_formed(sas_phy, 1);
1131 }
1132
1133 void mvs_port_deformed(struct asd_sas_phy *sas_phy)
1134 {
1135         mvs_port_notify_deformed(sas_phy, 1);
1136 }
1137
1138 static struct mvs_device *mvs_alloc_dev(struct mvs_info *mvi)
1139 {
1140         u32 dev;
1141         for (dev = 0; dev < MVS_MAX_DEVICES; dev++) {
1142                 if (mvi->devices[dev].dev_type == SAS_PHY_UNUSED) {
1143                         mvi->devices[dev].device_id = dev;
1144                         return &mvi->devices[dev];
1145                 }
1146         }
1147
1148         if (dev == MVS_MAX_DEVICES)
1149                 mv_printk("max support %d devices, ignore ..\n",
1150                         MVS_MAX_DEVICES);
1151
1152         return NULL;
1153 }
1154
1155 static void mvs_free_dev(struct mvs_device *mvi_dev)
1156 {
1157         u32 id = mvi_dev->device_id;
1158         memset(mvi_dev, 0, sizeof(*mvi_dev));
1159         mvi_dev->device_id = id;
1160         mvi_dev->dev_type = SAS_PHY_UNUSED;
1161         mvi_dev->dev_status = MVS_DEV_NORMAL;
1162         mvi_dev->taskfileset = MVS_ID_NOT_MAPPED;
1163 }
1164
1165 static int mvs_dev_found_notify(struct domain_device *dev, int lock)
1166 {
1167         unsigned long flags = 0;
1168         int res = 0;
1169         struct mvs_info *mvi = NULL;
1170         struct domain_device *parent_dev = dev->parent;
1171         struct mvs_device *mvi_device;
1172
1173         mvi = mvs_find_dev_mvi(dev);
1174
1175         if (lock)
1176                 spin_lock_irqsave(&mvi->lock, flags);
1177
1178         mvi_device = mvs_alloc_dev(mvi);
1179         if (!mvi_device) {
1180                 res = -1;
1181                 goto found_out;
1182         }
1183         dev->lldd_dev = mvi_device;
1184         mvi_device->dev_status = MVS_DEV_NORMAL;
1185         mvi_device->dev_type = dev->dev_type;
1186         mvi_device->mvi_info = mvi;
1187         mvi_device->sas_device = dev;
1188         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
1189                 int phy_id;
1190
1191                 phy_id = sas_find_attached_phy_id(&parent_dev->ex_dev, dev);
1192                 if (phy_id < 0) {
1193                         mv_printk("Error: no attached dev:%016llx"
1194                                 "at ex:%016llx.\n",
1195                                 SAS_ADDR(dev->sas_addr),
1196                                 SAS_ADDR(parent_dev->sas_addr));
1197                         res = phy_id;
1198                 } else {
1199                         mvi_device->attached_phy = phy_id;
1200                 }
1201         }
1202
1203 found_out:
1204         if (lock)
1205                 spin_unlock_irqrestore(&mvi->lock, flags);
1206         return res;
1207 }
1208
1209 int mvs_dev_found(struct domain_device *dev)
1210 {
1211         return mvs_dev_found_notify(dev, 1);
1212 }
1213
1214 static void mvs_dev_gone_notify(struct domain_device *dev)
1215 {
1216         unsigned long flags = 0;
1217         struct mvs_device *mvi_dev = dev->lldd_dev;
1218         struct mvs_info *mvi;
1219
1220         if (!mvi_dev) {
1221                 mv_dprintk("found dev has gone.\n");
1222                 return;
1223         }
1224
1225         mvi = mvi_dev->mvi_info;
1226
1227         spin_lock_irqsave(&mvi->lock, flags);
1228
1229         mv_dprintk("found dev[%d:%x] is gone.\n",
1230                 mvi_dev->device_id, mvi_dev->dev_type);
1231         mvs_release_task(mvi, dev);
1232         mvs_free_reg_set(mvi, mvi_dev);
1233         mvs_free_dev(mvi_dev);
1234
1235         dev->lldd_dev = NULL;
1236         mvi_dev->sas_device = NULL;
1237
1238         spin_unlock_irqrestore(&mvi->lock, flags);
1239 }
1240
1241
1242 void mvs_dev_gone(struct domain_device *dev)
1243 {
1244         mvs_dev_gone_notify(dev);
1245 }
1246
1247 /*  Standard mandates link reset for ATA  (type 0)
1248     and hard reset for SSP (type 1) , only for RECOVERY */
1249 static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
1250 {
1251         int rc;
1252         struct sas_phy *phy = sas_get_local_phy(dev);
1253         int reset_type = (dev->dev_type == SAS_SATA_DEV ||
1254                         (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1255         rc = sas_phy_reset(phy, reset_type);
1256         sas_put_local_phy(phy);
1257         msleep(2000);
1258         return rc;
1259 }
1260
1261 /* mandatory SAM-3 */
1262 int mvs_lu_reset(struct domain_device *dev, u8 *lun)
1263 {
1264         unsigned long flags;
1265         int rc = TMF_RESP_FUNC_FAILED;
1266         struct mvs_device * mvi_dev = dev->lldd_dev;
1267         struct mvs_info *mvi = mvi_dev->mvi_info;
1268
1269         mvi_dev->dev_status = MVS_DEV_EH;
1270         rc = sas_lu_reset(dev, lun);
1271         if (rc == TMF_RESP_FUNC_COMPLETE) {
1272                 spin_lock_irqsave(&mvi->lock, flags);
1273                 mvs_release_task(mvi, dev);
1274                 spin_unlock_irqrestore(&mvi->lock, flags);
1275         }
1276         /* If failed, fall-through I_T_Nexus reset */
1277         mv_printk("%s for device[%x]:rc= %d\n", __func__,
1278                         mvi_dev->device_id, rc);
1279         return rc;
1280 }
1281
1282 int mvs_I_T_nexus_reset(struct domain_device *dev)
1283 {
1284         unsigned long flags;
1285         int rc = TMF_RESP_FUNC_FAILED;
1286         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1287         struct mvs_info *mvi = mvi_dev->mvi_info;
1288
1289         if (mvi_dev->dev_status != MVS_DEV_EH)
1290                 return TMF_RESP_FUNC_COMPLETE;
1291         else
1292                 mvi_dev->dev_status = MVS_DEV_NORMAL;
1293         rc = mvs_debug_I_T_nexus_reset(dev);
1294         mv_printk("%s for device[%x]:rc= %d\n",
1295                 __func__, mvi_dev->device_id, rc);
1296
1297         spin_lock_irqsave(&mvi->lock, flags);
1298         mvs_release_task(mvi, dev);
1299         spin_unlock_irqrestore(&mvi->lock, flags);
1300
1301         return rc;
1302 }
1303 /* optional SAM-3 */
1304 int mvs_query_task(struct sas_task *task)
1305 {
1306         u32 tag;
1307         int rc = TMF_RESP_FUNC_FAILED;
1308
1309         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1310                 struct domain_device *dev = task->dev;
1311                 struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1312                 struct mvs_info *mvi = mvi_dev->mvi_info;
1313
1314                 rc = mvs_find_tag(mvi, task, &tag);
1315                 if (rc == 0) {
1316                         rc = TMF_RESP_FUNC_FAILED;
1317                         return rc;
1318                 }
1319
1320                 rc = sas_query_task(task, tag);
1321                 switch (rc) {
1322                 /* The task is still in Lun, release it then */
1323                 case TMF_RESP_FUNC_SUCC:
1324                 /* The task is not in Lun or failed, reset the phy */
1325                 case TMF_RESP_FUNC_FAILED:
1326                 case TMF_RESP_FUNC_COMPLETE:
1327                         break;
1328                 }
1329         }
1330         mv_printk("%s:rc= %d\n", __func__, rc);
1331         return rc;
1332 }
1333
1334 /*  mandatory SAM-3, still need free task/slot info */
1335 int mvs_abort_task(struct sas_task *task)
1336 {
1337         struct domain_device *dev = task->dev;
1338         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1339         struct mvs_info *mvi;
1340         int rc = TMF_RESP_FUNC_FAILED;
1341         unsigned long flags;
1342         u32 tag;
1343
1344         if (!mvi_dev) {
1345                 mv_printk("Device has removed\n");
1346                 return TMF_RESP_FUNC_FAILED;
1347         }
1348
1349         mvi = mvi_dev->mvi_info;
1350
1351         spin_lock_irqsave(&task->task_state_lock, flags);
1352         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1353                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1354                 rc = TMF_RESP_FUNC_COMPLETE;
1355                 goto out;
1356         }
1357         spin_unlock_irqrestore(&task->task_state_lock, flags);
1358         mvi_dev->dev_status = MVS_DEV_EH;
1359         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1360                 rc = mvs_find_tag(mvi, task, &tag);
1361                 if (rc == 0) {
1362                         mv_printk("No such tag in %s\n", __func__);
1363                         rc = TMF_RESP_FUNC_FAILED;
1364                         return rc;
1365                 }
1366
1367                 rc = sas_abort_task(task, tag);
1368
1369                 /* if successful, clear the task and callback forwards.*/
1370                 if (rc == TMF_RESP_FUNC_COMPLETE) {
1371                         u32 slot_no;
1372                         struct mvs_slot_info *slot;
1373
1374                         if (task->lldd_task) {
1375                                 slot = task->lldd_task;
1376                                 slot_no = (u32) (slot - mvi->slot_info);
1377                                 spin_lock_irqsave(&mvi->lock, flags);
1378                                 mvs_slot_complete(mvi, slot_no, 1);
1379                                 spin_unlock_irqrestore(&mvi->lock, flags);
1380                         }
1381                 }
1382
1383         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1384                 task->task_proto & SAS_PROTOCOL_STP) {
1385                 if (SAS_SATA_DEV == dev->dev_type) {
1386                         struct mvs_slot_info *slot = task->lldd_task;
1387                         u32 slot_idx = (u32)(slot - mvi->slot_info);
1388                         mv_dprintk("mvs_abort_task() mvi=%p task=%p "
1389                                    "slot=%p slot_idx=x%x\n",
1390                                    mvi, task, slot, slot_idx);
1391                         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1392                         mvs_slot_task_free(mvi, task, slot, slot_idx);
1393                         rc = TMF_RESP_FUNC_COMPLETE;
1394                         goto out;
1395                 }
1396
1397         }
1398 out:
1399         if (rc != TMF_RESP_FUNC_COMPLETE)
1400                 mv_printk("%s:rc= %d\n", __func__, rc);
1401         return rc;
1402 }
1403
1404 static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
1405                         u32 slot_idx, int err)
1406 {
1407         struct mvs_device *mvi_dev = task->dev->lldd_dev;
1408         struct task_status_struct *tstat = &task->task_status;
1409         struct ata_task_resp *resp = (struct ata_task_resp *)tstat->buf;
1410         int stat = SAM_STAT_GOOD;
1411
1412
1413         resp->frame_len = sizeof(struct dev_to_host_fis);
1414         memcpy(&resp->ending_fis[0],
1415                SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset),
1416                sizeof(struct dev_to_host_fis));
1417         tstat->buf_valid_size = sizeof(*resp);
1418         if (unlikely(err)) {
1419                 if (unlikely(err & CMD_ISS_STPD))
1420                         stat = SAS_OPEN_REJECT;
1421                 else
1422                         stat = SAS_PROTO_RESPONSE;
1423        }
1424
1425         return stat;
1426 }
1427
1428 static void mvs_set_sense(u8 *buffer, int len, int d_sense,
1429                 int key, int asc, int ascq)
1430 {
1431         memset(buffer, 0, len);
1432
1433         if (d_sense) {
1434                 /* Descriptor format */
1435                 if (len < 4) {
1436                         mv_printk("Length %d of sense buffer too small to "
1437                                 "fit sense %x:%x:%x", len, key, asc, ascq);
1438                 }
1439
1440                 buffer[0] = 0x72;               /* Response Code        */
1441                 if (len > 1)
1442                         buffer[1] = key;        /* Sense Key */
1443                 if (len > 2)
1444                         buffer[2] = asc;        /* ASC  */
1445                 if (len > 3)
1446                         buffer[3] = ascq;       /* ASCQ */
1447         } else {
1448                 if (len < 14) {
1449                         mv_printk("Length %d of sense buffer too small to "
1450                                 "fit sense %x:%x:%x", len, key, asc, ascq);
1451                 }
1452
1453                 buffer[0] = 0x70;               /* Response Code        */
1454                 if (len > 2)
1455                         buffer[2] = key;        /* Sense Key */
1456                 if (len > 7)
1457                         buffer[7] = 0x0a;       /* Additional Sense Length */
1458                 if (len > 12)
1459                         buffer[12] = asc;       /* ASC */
1460                 if (len > 13)
1461                         buffer[13] = ascq; /* ASCQ */
1462         }
1463
1464         return;
1465 }
1466
1467 static void mvs_fill_ssp_resp_iu(struct ssp_response_iu *iu,
1468                                 u8 key, u8 asc, u8 asc_q)
1469 {
1470         iu->datapres = SAS_DATAPRES_SENSE_DATA;
1471         iu->response_data_len = 0;
1472         iu->sense_data_len = 17;
1473         iu->status = 02;
1474         mvs_set_sense(iu->sense_data, 17, 0,
1475                         key, asc, asc_q);
1476 }
1477
1478 static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task,
1479                          u32 slot_idx)
1480 {
1481         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1482         int stat;
1483         u32 err_dw0 = le32_to_cpu(*(u32 *)slot->response);
1484         u32 err_dw1 = le32_to_cpu(*((u32 *)slot->response + 1));
1485         u32 tfs = 0;
1486         enum mvs_port_type type = PORT_TYPE_SAS;
1487
1488         if (err_dw0 & CMD_ISS_STPD)
1489                 MVS_CHIP_DISP->issue_stop(mvi, type, tfs);
1490
1491         MVS_CHIP_DISP->command_active(mvi, slot_idx);
1492
1493         stat = SAM_STAT_CHECK_CONDITION;
1494         switch (task->task_proto) {
1495         case SAS_PROTOCOL_SSP:
1496         {
1497                 stat = SAS_ABORTED_TASK;
1498                 if ((err_dw0 & NO_DEST) || err_dw1 & bit(31)) {
1499                         struct ssp_response_iu *iu = slot->response +
1500                                 sizeof(struct mvs_err_info);
1501                         mvs_fill_ssp_resp_iu(iu, NOT_READY, 0x04, 01);
1502                         sas_ssp_task_response(mvi->dev, task, iu);
1503                         stat = SAM_STAT_CHECK_CONDITION;
1504                 }
1505                 if (err_dw1 & bit(31))
1506                         mv_printk("reuse same slot, retry command.\n");
1507                 break;
1508         }
1509         case SAS_PROTOCOL_SMP:
1510                 stat = SAM_STAT_CHECK_CONDITION;
1511                 break;
1512
1513         case SAS_PROTOCOL_SATA:
1514         case SAS_PROTOCOL_STP:
1515         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
1516         {
1517                 task->ata_task.use_ncq = 0;
1518                 stat = SAS_PROTO_RESPONSE;
1519                 mvs_sata_done(mvi, task, slot_idx, err_dw0);
1520         }
1521                 break;
1522         default:
1523                 break;
1524         }
1525
1526         return stat;
1527 }
1528
1529 int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
1530 {
1531         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1532         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1533         struct sas_task *task = slot->task;
1534         struct mvs_device *mvi_dev = NULL;
1535         struct task_status_struct *tstat;
1536         struct domain_device *dev;
1537         u32 aborted;
1538
1539         void *to;
1540         enum exec_status sts;
1541
1542         if (unlikely(!task || !task->lldd_task || !task->dev))
1543                 return -1;
1544
1545         tstat = &task->task_status;
1546         dev = task->dev;
1547         mvi_dev = dev->lldd_dev;
1548
1549         spin_lock(&task->task_state_lock);
1550         task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1551         task->task_state_flags |= SAS_TASK_STATE_DONE;
1552         /* race condition*/
1553         aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED;
1554         spin_unlock(&task->task_state_lock);
1555
1556         memset(tstat, 0, sizeof(*tstat));
1557         tstat->resp = SAS_TASK_COMPLETE;
1558
1559         if (unlikely(aborted)) {
1560                 tstat->stat = SAS_ABORTED_TASK;
1561                 if (mvi_dev && mvi_dev->running_req)
1562                         mvi_dev->running_req--;
1563                 if (sas_protocol_ata(task->task_proto))
1564                         mvs_free_reg_set(mvi, mvi_dev);
1565
1566                 mvs_slot_task_free(mvi, task, slot, slot_idx);
1567                 return -1;
1568         }
1569
1570         /* when no device attaching, go ahead and complete by error handling*/
1571         if (unlikely(!mvi_dev || flags)) {
1572                 if (!mvi_dev)
1573                         mv_dprintk("port has not device.\n");
1574                 tstat->stat = SAS_PHY_DOWN;
1575                 goto out;
1576         }
1577
1578         /*
1579          * error info record present; slot->response is 32 bit aligned but may
1580          * not be 64 bit aligned, so check for zero in two 32 bit reads
1581          */
1582         if (unlikely((rx_desc & RXQ_ERR)
1583                      && (*((u32 *)slot->response)
1584                          || *(((u32 *)slot->response) + 1)))) {
1585                 mv_dprintk("port %d slot %d rx_desc %X has error info"
1586                         "%016llX.\n", slot->port->sas_port.id, slot_idx,
1587                          rx_desc, get_unaligned_le64(slot->response));
1588                 tstat->stat = mvs_slot_err(mvi, task, slot_idx);
1589                 tstat->resp = SAS_TASK_COMPLETE;
1590                 goto out;
1591         }
1592
1593         switch (task->task_proto) {
1594         case SAS_PROTOCOL_SSP:
1595                 /* hw says status == 0, datapres == 0 */
1596                 if (rx_desc & RXQ_GOOD) {
1597                         tstat->stat = SAS_SAM_STAT_GOOD;
1598                         tstat->resp = SAS_TASK_COMPLETE;
1599                 }
1600                 /* response frame present */
1601                 else if (rx_desc & RXQ_RSP) {
1602                         struct ssp_response_iu *iu = slot->response +
1603                                                 sizeof(struct mvs_err_info);
1604                         sas_ssp_task_response(mvi->dev, task, iu);
1605                 } else
1606                         tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
1607                 break;
1608
1609         case SAS_PROTOCOL_SMP: {
1610                         struct scatterlist *sg_resp = &task->smp_task.smp_resp;
1611                         tstat->stat = SAS_SAM_STAT_GOOD;
1612                         to = kmap_atomic(sg_page(sg_resp));
1613                         memcpy(to + sg_resp->offset,
1614                                 slot->response + sizeof(struct mvs_err_info),
1615                                 sg_dma_len(sg_resp));
1616                         kunmap_atomic(to);
1617                         break;
1618                 }
1619
1620         case SAS_PROTOCOL_SATA:
1621         case SAS_PROTOCOL_STP:
1622         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: {
1623                         tstat->stat = mvs_sata_done(mvi, task, slot_idx, 0);
1624                         break;
1625                 }
1626
1627         default:
1628                 tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
1629                 break;
1630         }
1631         if (!slot->port->port_attached) {
1632                 mv_dprintk("port %d has removed.\n", slot->port->sas_port.id);
1633                 tstat->stat = SAS_PHY_DOWN;
1634         }
1635
1636
1637 out:
1638         if (mvi_dev && mvi_dev->running_req) {
1639                 mvi_dev->running_req--;
1640                 if (sas_protocol_ata(task->task_proto) && !mvi_dev->running_req)
1641                         mvs_free_reg_set(mvi, mvi_dev);
1642         }
1643         mvs_slot_task_free(mvi, task, slot, slot_idx);
1644         sts = tstat->stat;
1645
1646         spin_unlock(&mvi->lock);
1647         if (task->task_done)
1648                 task->task_done(task);
1649
1650         spin_lock(&mvi->lock);
1651
1652         return sts;
1653 }
1654
1655 void mvs_do_release_task(struct mvs_info *mvi,
1656                 int phy_no, struct domain_device *dev)
1657 {
1658         u32 slot_idx;
1659         struct mvs_phy *phy;
1660         struct mvs_port *port;
1661         struct mvs_slot_info *slot, *slot2;
1662
1663         phy = &mvi->phy[phy_no];
1664         port = phy->port;
1665         if (!port)
1666                 return;
1667         /* clean cmpl queue in case request is already finished */
1668         mvs_int_rx(mvi, false);
1669
1670
1671
1672         list_for_each_entry_safe(slot, slot2, &port->list, entry) {
1673                 struct sas_task *task;
1674                 slot_idx = (u32) (slot - mvi->slot_info);
1675                 task = slot->task;
1676
1677                 if (dev && task->dev != dev)
1678                         continue;
1679
1680                 mv_printk("Release slot [%x] tag[%x], task [%p]:\n",
1681                         slot_idx, slot->slot_tag, task);
1682                 MVS_CHIP_DISP->command_active(mvi, slot_idx);
1683
1684                 mvs_slot_complete(mvi, slot_idx, 1);
1685         }
1686 }
1687
1688 void mvs_release_task(struct mvs_info *mvi,
1689                       struct domain_device *dev)
1690 {
1691         int i, phyno[WIDE_PORT_MAX_PHY], num;
1692         num = mvs_find_dev_phyno(dev, phyno);
1693         for (i = 0; i < num; i++)
1694                 mvs_do_release_task(mvi, phyno[i], dev);
1695 }
1696
1697 static void mvs_phy_disconnected(struct mvs_phy *phy)
1698 {
1699         phy->phy_attached = 0;
1700         phy->att_dev_info = 0;
1701         phy->att_dev_sas_addr = 0;
1702 }
1703
1704 static void mvs_work_queue(struct work_struct *work)
1705 {
1706         struct delayed_work *dw = container_of(work, struct delayed_work, work);
1707         struct mvs_wq *mwq = container_of(dw, struct mvs_wq, work_q);
1708         struct mvs_info *mvi = mwq->mvi;
1709         unsigned long flags;
1710         u32 phy_no = (unsigned long) mwq->data;
1711         struct mvs_phy *phy = &mvi->phy[phy_no];
1712         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1713
1714         spin_lock_irqsave(&mvi->lock, flags);
1715         if (mwq->handler & PHY_PLUG_EVENT) {
1716
1717                 if (phy->phy_event & PHY_PLUG_OUT) {
1718                         u32 tmp;
1719
1720                         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no);
1721                         phy->phy_event &= ~PHY_PLUG_OUT;
1722                         if (!(tmp & PHY_READY_MASK)) {
1723                                 sas_phy_disconnected(sas_phy);
1724                                 mvs_phy_disconnected(phy);
1725                                 sas_notify_phy_event(sas_phy,
1726                                         PHYE_LOSS_OF_SIGNAL, GFP_ATOMIC);
1727                                 mv_dprintk("phy%d Removed Device\n", phy_no);
1728                         } else {
1729                                 MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1730                                 mvs_update_phyinfo(mvi, phy_no, 1);
1731                                 mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC);
1732                                 mvs_port_notify_formed(sas_phy, 0);
1733                                 mv_dprintk("phy%d Attached Device\n", phy_no);
1734                         }
1735                 }
1736         } else if (mwq->handler & EXP_BRCT_CHG) {
1737                 phy->phy_event &= ~EXP_BRCT_CHG;
1738                 sas_notify_port_event(sas_phy,
1739                                 PORTE_BROADCAST_RCVD, GFP_ATOMIC);
1740                 mv_dprintk("phy%d Got Broadcast Change\n", phy_no);
1741         }
1742         list_del(&mwq->entry);
1743         spin_unlock_irqrestore(&mvi->lock, flags);
1744         kfree(mwq);
1745 }
1746
1747 static int mvs_handle_event(struct mvs_info *mvi, void *data, int handler)
1748 {
1749         struct mvs_wq *mwq;
1750         int ret = 0;
1751
1752         mwq = kmalloc(sizeof(struct mvs_wq), GFP_ATOMIC);
1753         if (mwq) {
1754                 mwq->mvi = mvi;
1755                 mwq->data = data;
1756                 mwq->handler = handler;
1757                 MV_INIT_DELAYED_WORK(&mwq->work_q, mvs_work_queue, mwq);
1758                 list_add_tail(&mwq->entry, &mvi->wq_list);
1759                 schedule_delayed_work(&mwq->work_q, HZ * 2);
1760         } else
1761                 ret = -ENOMEM;
1762
1763         return ret;
1764 }
1765
1766 static void mvs_sig_time_out(struct timer_list *t)
1767 {
1768         struct mvs_phy *phy = from_timer(phy, t, timer);
1769         struct mvs_info *mvi = phy->mvi;
1770         u8 phy_no;
1771
1772         for (phy_no = 0; phy_no < mvi->chip->n_phy; phy_no++) {
1773                 if (&mvi->phy[phy_no] == phy) {
1774                         mv_dprintk("Get signature time out, reset phy %d\n",
1775                                 phy_no+mvi->id*mvi->chip->n_phy);
1776                         MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_HARD_RESET);
1777                 }
1778         }
1779 }
1780
1781 void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
1782 {
1783         u32 tmp;
1784         struct mvs_phy *phy = &mvi->phy[phy_no];
1785
1786         phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, phy_no);
1787         MVS_CHIP_DISP->write_port_irq_stat(mvi, phy_no, phy->irq_status);
1788         mv_dprintk("phy %d ctrl sts=0x%08X.\n", phy_no+mvi->id*mvi->chip->n_phy,
1789                 MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no));
1790         mv_dprintk("phy %d irq sts = 0x%08X\n", phy_no+mvi->id*mvi->chip->n_phy,
1791                 phy->irq_status);
1792
1793         /*
1794         * events is port event now ,
1795         * we need check the interrupt status which belongs to per port.
1796         */
1797
1798         if (phy->irq_status & PHYEV_DCDR_ERR) {
1799                 mv_dprintk("phy %d STP decoding error.\n",
1800                 phy_no + mvi->id*mvi->chip->n_phy);
1801         }
1802
1803         if (phy->irq_status & PHYEV_POOF) {
1804                 mdelay(500);
1805                 if (!(phy->phy_event & PHY_PLUG_OUT)) {
1806                         int dev_sata = phy->phy_type & PORT_TYPE_SATA;
1807                         int ready;
1808                         mvs_do_release_task(mvi, phy_no, NULL);
1809                         phy->phy_event |= PHY_PLUG_OUT;
1810                         MVS_CHIP_DISP->clear_srs_irq(mvi, 0, 1);
1811                         mvs_handle_event(mvi,
1812                                 (void *)(unsigned long)phy_no,
1813                                 PHY_PLUG_EVENT);
1814                         ready = mvs_is_phy_ready(mvi, phy_no);
1815                         if (ready || dev_sata) {
1816                                 if (MVS_CHIP_DISP->stp_reset)
1817                                         MVS_CHIP_DISP->stp_reset(mvi,
1818                                                         phy_no);
1819                                 else
1820                                         MVS_CHIP_DISP->phy_reset(mvi,
1821                                                         phy_no, MVS_SOFT_RESET);
1822                                 return;
1823                         }
1824                 }
1825         }
1826
1827         if (phy->irq_status & PHYEV_COMWAKE) {
1828                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, phy_no);
1829                 MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
1830                                         tmp | PHYEV_SIG_FIS);
1831                 if (phy->timer.function == NULL) {
1832                         phy->timer.function = mvs_sig_time_out;
1833                         phy->timer.expires = jiffies + 5*HZ;
1834                         add_timer(&phy->timer);
1835                 }
1836         }
1837         if (phy->irq_status & (PHYEV_SIG_FIS | PHYEV_ID_DONE)) {
1838                 phy->phy_status = mvs_is_phy_ready(mvi, phy_no);
1839                 mv_dprintk("notify plug in on phy[%d]\n", phy_no);
1840                 if (phy->phy_status) {
1841                         mdelay(10);
1842                         MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1843                         if (phy->phy_type & PORT_TYPE_SATA) {
1844                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(
1845                                                 mvi, phy_no);
1846                                 tmp &= ~PHYEV_SIG_FIS;
1847                                 MVS_CHIP_DISP->write_port_irq_mask(mvi,
1848                                                         phy_no, tmp);
1849                         }
1850                         mvs_update_phyinfo(mvi, phy_no, 0);
1851                         if (phy->phy_type & PORT_TYPE_SAS) {
1852                                 MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_PHY_TUNE);
1853                                 mdelay(10);
1854                         }
1855
1856                         mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC);
1857                         /* whether driver is going to handle hot plug */
1858                         if (phy->phy_event & PHY_PLUG_OUT) {
1859                                 mvs_port_notify_formed(&phy->sas_phy, 0);
1860                                 phy->phy_event &= ~PHY_PLUG_OUT;
1861                         }
1862                 } else {
1863                         mv_dprintk("plugin interrupt but phy%d is gone\n",
1864                                 phy_no + mvi->id*mvi->chip->n_phy);
1865                 }
1866         } else if (phy->irq_status & PHYEV_BROAD_CH) {
1867                 mv_dprintk("phy %d broadcast change.\n",
1868                         phy_no + mvi->id*mvi->chip->n_phy);
1869                 mvs_handle_event(mvi, (void *)(unsigned long)phy_no,
1870                                 EXP_BRCT_CHG);
1871         }
1872 }
1873
1874 int mvs_int_rx(struct mvs_info *mvi, bool self_clear)
1875 {
1876         u32 rx_prod_idx, rx_desc;
1877         bool attn = false;
1878
1879         /* the first dword in the RX ring is special: it contains
1880          * a mirror of the hardware's RX producer index, so that
1881          * we don't have to stall the CPU reading that register.
1882          * The actual RX ring is offset by one dword, due to this.
1883          */
1884         rx_prod_idx = mvi->rx_cons;
1885         mvi->rx_cons = le32_to_cpu(mvi->rx[0]);
1886         if (mvi->rx_cons == 0xfff)      /* h/w hasn't touched RX ring yet */
1887                 return 0;
1888
1889         /* The CMPL_Q may come late, read from register and try again
1890         * note: if coalescing is enabled,
1891         * it will need to read from register every time for sure
1892         */
1893         if (unlikely(mvi->rx_cons == rx_prod_idx))
1894                 mvi->rx_cons = MVS_CHIP_DISP->rx_update(mvi) & RX_RING_SZ_MASK;
1895
1896         if (mvi->rx_cons == rx_prod_idx)
1897                 return 0;
1898
1899         while (mvi->rx_cons != rx_prod_idx) {
1900                 /* increment our internal RX consumer pointer */
1901                 rx_prod_idx = (rx_prod_idx + 1) & (MVS_RX_RING_SZ - 1);
1902                 rx_desc = le32_to_cpu(mvi->rx[rx_prod_idx + 1]);
1903
1904                 if (likely(rx_desc & RXQ_DONE))
1905                         mvs_slot_complete(mvi, rx_desc, 0);
1906                 if (rx_desc & RXQ_ATTN) {
1907                         attn = true;
1908                 } else if (rx_desc & RXQ_ERR) {
1909                         if (!(rx_desc & RXQ_DONE))
1910                                 mvs_slot_complete(mvi, rx_desc, 0);
1911                 } else if (rx_desc & RXQ_SLOT_RESET) {
1912                         mvs_slot_free(mvi, rx_desc);
1913                 }
1914         }
1915
1916         if (attn && self_clear)
1917                 MVS_CHIP_DISP->int_full(mvi);
1918         return 0;
1919 }
1920
1921 int mvs_gpio_write(struct sas_ha_struct *sha, u8 reg_type, u8 reg_index,
1922                         u8 reg_count, u8 *write_data)
1923 {
1924         struct mvs_prv_info *mvs_prv = sha->lldd_ha;
1925         struct mvs_info *mvi = mvs_prv->mvi[0];
1926
1927         if (MVS_CHIP_DISP->gpio_write) {
1928                 return MVS_CHIP_DISP->gpio_write(mvs_prv, reg_type,
1929                         reg_index, reg_count, write_data);
1930         }
1931
1932         return -ENOSYS;
1933 }