drivers/scsi/mvsas/mv_sas.c

   1 /*
   2  * Marvell 88SE64xx/88SE94xx main function
   3  *
   4  * Copyright 2007 Red Hat, Inc.
   5  * Copyright 2008 Marvell. <kewei@marvell.com>
   6  * Copyright 2009-2011 Marvell. <yuxiangl@marvell.com>
   7  *
   8  * This file is licensed under GPLv2.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; version 2 of the
  13  * License.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  23  * USA
  24 */
  25
  26 #include "mv_sas.h"
  27
  28 static int mvs_find_tag(struct mvs_info *mvi, struct sas_task *task, u32 *tag)
  29 {
  30         if (task->lldd_task) {
  31                 struct mvs_slot_info *slot;
  32                 slot = task->lldd_task;
  33                 *tag = slot->slot_tag;
  34                 return 1;
  35         }
  36         return 0;
  37 }
  38
  39 void mvs_tag_clear(struct mvs_info *mvi, u32 tag)
  40 {
  41         void *bitmap = mvi->tags;
  42         clear_bit(tag, bitmap);
  43 }
  44
  45 void mvs_tag_free(struct mvs_info *mvi, u32 tag)
  46 {
  47         mvs_tag_clear(mvi, tag);
  48 }
  49
  50 void mvs_tag_set(struct mvs_info *mvi, unsigned int tag)
  51 {
  52         void *bitmap = mvi->tags;
  53         set_bit(tag, bitmap);
  54 }
  55
  56 inline int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out)
  57 {
  58         unsigned int index, tag;
  59         void *bitmap = mvi->tags;
  60
  61         index = find_first_zero_bit(bitmap, mvi->tags_num);
  62         tag = index;
  63         if (tag >= mvi->tags_num)
  64                 return -SAS_QUEUE_FULL;
  65         mvs_tag_set(mvi, tag);
  66         *tag_out = tag;
  67         return 0;
  68 }
  69
  70 void mvs_tag_init(struct mvs_info *mvi)
  71 {
  72         int i;
  73         for (i = 0; i < mvi->tags_num; ++i)
  74                 mvs_tag_clear(mvi, i);
  75 }
  76
  77 struct mvs_info *mvs_find_dev_mvi(struct domain_device *dev)
  78 {
  79         unsigned long i = 0, j = 0, hi = 0;
  80         struct sas_ha_struct *sha = dev->port->ha;
  81         struct mvs_info *mvi = NULL;
  82         struct asd_sas_phy *phy;
  83
  84         while (sha->sas_port[i]) {
  85                 if (sha->sas_port[i] == dev->port) {
  86                         phy =  container_of(sha->sas_port[i]->phy_list.next,
  87                                 struct asd_sas_phy, port_phy_el);
  88                         j = 0;
  89                         while (sha->sas_phy[j]) {
  90                                 if (sha->sas_phy[j] == phy)
  91                                         break;
  92                                 j++;
  93                         }
  94                         break;
  95                 }
  96                 i++;
  97         }
  98         hi = j/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
  99         mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
 100
 101         return mvi;
 102
 103 }
 104
 105 int mvs_find_dev_phyno(struct domain_device *dev, int *phyno)
 106 {
 107         unsigned long i = 0, j = 0, n = 0, num = 0;
 108         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
 109         struct mvs_info *mvi = mvi_dev->mvi_info;
 110         struct sas_ha_struct *sha = dev->port->ha;
 111
 112         while (sha->sas_port[i]) {
 113                 if (sha->sas_port[i] == dev->port) {
 114                         struct asd_sas_phy *phy;
 115                         list_for_each_entry(phy,
 116                                 &sha->sas_port[i]->phy_list, port_phy_el) {
 117                                 j = 0;
 118                                 while (sha->sas_phy[j]) {
 119                                         if (sha->sas_phy[j] == phy)
 120                                                 break;
 121                                         j++;
 122                                 }
 123                                 phyno[n] = (j >= mvi->chip->n_phy) ?
 124                                         (j - mvi->chip->n_phy) : j;
 125                                 num++;
 126                                 n++;
 127                         }
 128                         break;
 129                 }
 130                 i++;
 131         }
 132         return num;
 133 }
 134
 135 struct mvs_device *mvs_find_dev_by_reg_set(struct mvs_info *mvi,
 136                                                 u8 reg_set)
 137 {
 138         u32 dev_no;
 139         for (dev_no = 0; dev_no < MVS_MAX_DEVICES; dev_no++) {
 140                 if (mvi->devices[dev_no].taskfileset == MVS_ID_NOT_MAPPED)
 141                         continue;
 142
 143                 if (mvi->devices[dev_no].taskfileset == reg_set)
 144                         return &mvi->devices[dev_no];
 145         }
 146         return NULL;
 147 }
 148
 149 static inline void mvs_free_reg_set(struct mvs_info *mvi,
 150                                 struct mvs_device *dev)
 151 {
 152         if (!dev) {
 153                 mv_printk("device has been free.\n");
 154                 return;
 155         }
 156         if (dev->taskfileset == MVS_ID_NOT_MAPPED)
 157                 return;
 158         MVS_CHIP_DISP->free_reg_set(mvi, &dev->taskfileset);
 159 }
 160
 161 static inline u8 mvs_assign_reg_set(struct mvs_info *mvi,
 162                                 struct mvs_device *dev)
 163 {
 164         if (dev->taskfileset != MVS_ID_NOT_MAPPED)
 165                 return 0;
 166         return MVS_CHIP_DISP->assign_reg_set(mvi, &dev->taskfileset);
 167 }
 168
 169 void mvs_phys_reset(struct mvs_info *mvi, u32 phy_mask, int hard)
 170 {
 171         u32 no;
 172         for_each_phy(phy_mask, phy_mask, no) {
 173                 if (!(phy_mask & 1))
 174                         continue;
 175                 MVS_CHIP_DISP->phy_reset(mvi, no, hard);
 176         }
 177 }
 178
 179 int mvs_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 180                         void *funcdata)
 181 {
 182         int rc = 0, phy_id = sas_phy->id;
 183         u32 tmp, i = 0, hi;
 184         struct sas_ha_struct *sha = sas_phy->ha;
 185         struct mvs_info *mvi = NULL;
 186
 187         while (sha->sas_phy[i]) {
 188                 if (sha->sas_phy[i] == sas_phy)
 189                         break;
 190                 i++;
 191         }
 192         hi = i/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
 193         mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
 194
 195         switch (func) {
 196         case PHY_FUNC_SET_LINK_RATE:
 197                 MVS_CHIP_DISP->phy_set_link_rate(mvi, phy_id, funcdata);
 198                 break;
 199
 200         case PHY_FUNC_HARD_RESET:
 201                 tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_id);
 202                 if (tmp & PHY_RST_HARD)
 203                         break;
 204                 MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_HARD_RESET);
 205                 break;
 206
 207         case PHY_FUNC_LINK_RESET:
 208                 MVS_CHIP_DISP->phy_enable(mvi, phy_id);
 209                 MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_SOFT_RESET);
 210                 break;
 211
 212         case PHY_FUNC_DISABLE:
 213                 MVS_CHIP_DISP->phy_disable(mvi, phy_id);
 214                 break;
 215         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 216         default:
 217                 rc = -ENOSYS;
 218         }
 219         msleep(200);
 220         return rc;
 221 }
 222
 223 void mvs_set_sas_addr(struct mvs_info *mvi, int port_id, u32 off_lo,
 224                       u32 off_hi, u64 sas_addr)
 225 {
 226         u32 lo = (u32)sas_addr;
 227         u32 hi = (u32)(sas_addr>>32);
 228
 229         MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_lo);
 230         MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, lo);
 231         MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_hi);
 232         MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, hi);
 233 }
 234
 235 static void mvs_bytes_dmaed(struct mvs_info *mvi, int i)
 236 {
 237         struct mvs_phy *phy = &mvi->phy[i];
 238         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 239         struct sas_ha_struct *sas_ha;
 240         if (!phy->phy_attached)
 241                 return;
 242
 243         if (!(phy->att_dev_info & PORT_DEV_TRGT_MASK)
 244                 && phy->phy_type & PORT_TYPE_SAS) {
 245                 return;
 246         }
 247
 248         sas_ha = mvi->sas;
 249         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 250
 251         if (sas_phy->phy) {
 252                 struct sas_phy *sphy = sas_phy->phy;
 253
 254                 sphy->negotiated_linkrate = sas_phy->linkrate;
 255                 sphy->minimum_linkrate = phy->minimum_linkrate;
 256                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 257                 sphy->maximum_linkrate = phy->maximum_linkrate;
 258                 sphy->maximum_linkrate_hw = MVS_CHIP_DISP->phy_max_link_rate();
 259         }
 260
 261         if (phy->phy_type & PORT_TYPE_SAS) {
 262                 struct sas_identify_frame *id;
 263
 264                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 265                 id->dev_type = phy->identify.device_type;
 266                 id->initiator_bits = SAS_PROTOCOL_ALL;
 267                 id->target_bits = phy->identify.target_port_protocols;
 268
 269                 /* direct attached SAS device */
 270                 if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
 271                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
 272                         MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x00);
 273                 }
 274         } else if (phy->phy_type & PORT_TYPE_SATA) {
 275                 /*Nothing*/
 276         }
 277         mv_dprintk("phy %d byte dmaded.\n", i + mvi->id * mvi->chip->n_phy);
 278
 279         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 280
 281         mvi->sas->notify_port_event(sas_phy,
 282                                    PORTE_BYTES_DMAED);
 283 }
 284
 285 void mvs_scan_start(struct Scsi_Host *shost)
 286 {
 287         int i, j;
 288         unsigned short core_nr;
 289         struct mvs_info *mvi;
 290         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 291         struct mvs_prv_info *mvs_prv = sha->lldd_ha;
 292
 293         core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host;
 294
 295         for (j = 0; j < core_nr; j++) {
 296                 mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[j];
 297                 for (i = 0; i < mvi->chip->n_phy; ++i)
 298                         mvs_bytes_dmaed(mvi, i);
 299         }
 300         mvs_prv->scan_finished = 1;
 301 }
 302
 303 int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time)
 304 {
 305         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 306         struct mvs_prv_info *mvs_prv = sha->lldd_ha;
 307
 308         if (mvs_prv->scan_finished == 0)
 309                 return 0;
 310
 311         sas_drain_work(sha);
 312         return 1;
 313 }
 314
 315 static int mvs_task_prep_smp(struct mvs_info *mvi,
 316                              struct mvs_task_exec_info *tei)
 317 {
 318         int elem, rc, i;
 319         struct sas_ha_struct *sha = mvi->sas;
 320         struct sas_task *task = tei->task;
 321         struct mvs_cmd_hdr *hdr = tei->hdr;
 322         struct domain_device *dev = task->dev;
 323         struct asd_sas_port *sas_port = dev->port;
 324         struct sas_phy *sphy = dev->phy;
 325         struct asd_sas_phy *sas_phy = sha->sas_phy[sphy->number];
 326         struct scatterlist *sg_req, *sg_resp;
 327         u32 req_len, resp_len, tag = tei->tag;
 328         void *buf_tmp;
 329         u8 *buf_oaf;
 330         dma_addr_t buf_tmp_dma;
 331         void *buf_prd;
 332         struct mvs_slot_info *slot = &mvi->slot_info[tag];
 333         u32 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 334
 335         /*
 336          * DMA-map SMP request, response buffers
 337          */
 338         sg_req = &task->smp_task.smp_req;
 339         elem = dma_map_sg(mvi->dev, sg_req, 1, PCI_DMA_TODEVICE);
 340         if (!elem)
 341                 return -ENOMEM;
 342         req_len = sg_dma_len(sg_req);
 343
 344         sg_resp = &task->smp_task.smp_resp;
 345         elem = dma_map_sg(mvi->dev, sg_resp, 1, PCI_DMA_FROMDEVICE);
 346         if (!elem) {
 347                 rc = -ENOMEM;
 348                 goto err_out;
 349         }
 350         resp_len = SB_RFB_MAX;
 351
 352         /* must be in dwords */
 353         if ((req_len & 0x3) || (resp_len & 0x3)) {
 354                 rc = -EINVAL;
 355                 goto err_out_2;
 356         }
 357
 358         /*
 359          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 360          */
 361
 362         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ***** */
 363         buf_tmp = slot->buf;
 364         buf_tmp_dma = slot->buf_dma;
 365
 366         hdr->cmd_tbl = cpu_to_le64(sg_dma_address(sg_req));
 367
 368         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 369         buf_oaf = buf_tmp;
 370         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 371
 372         buf_tmp += MVS_OAF_SZ;
 373         buf_tmp_dma += MVS_OAF_SZ;
 374
 375         /* region 3: PRD table *********************************** */
 376         buf_prd = buf_tmp;
 377         if (tei->n_elem)
 378                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 379         else
 380                 hdr->prd_tbl = 0;
 381
 382         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 383         buf_tmp += i;
 384         buf_tmp_dma += i;
 385
 386         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 387         slot->response = buf_tmp;
 388         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 389         if (mvi->flags & MVF_FLAG_SOC)
 390                 hdr->reserved[0] = 0;
 391
 392         /*
 393          * Fill in TX ring and command slot header
 394          */
 395         slot->tx = mvi->tx_prod;
 396         mvi->tx[mvi->tx_prod] = cpu_to_le32((TXQ_CMD_SMP << TXQ_CMD_SHIFT) |
 397                                         TXQ_MODE_I | tag |
 398                                         (MVS_PHY_ID << TXQ_PHY_SHIFT));
 399
 400         hdr->flags |= flags;
 401         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | ((req_len - 4) / 4));
 402         hdr->tags = cpu_to_le32(tag);
 403         hdr->data_len = 0;
 404
 405         /* generate open address frame hdr (first 12 bytes) */
 406         /* initiator, SMP, ftype 1h */
 407         buf_oaf[0] = (1 << 7) | (PROTOCOL_SMP << 4) | 0x01;
 408         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 409         *(u16 *)(buf_oaf + 2) = 0xFFFF;         /* SAS SPEC */
 410         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 411
 412         /* fill in PRD (scatter/gather) table, if any */
 413         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 414
 415         return 0;
 416
 417 err_out_2:
 418         dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_resp, 1,
 419                      PCI_DMA_FROMDEVICE);
 420 err_out:
 421         dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_req, 1,
 422                      PCI_DMA_TODEVICE);
 423         return rc;
 424 }
 425
 426 static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag)
 427 {
 428         struct ata_queued_cmd *qc = task->uldd_task;
 429
 430         if (qc) {
 431                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 432                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 433                         *tag = qc->tag;
 434                         return 1;
 435                 }
 436         }
 437
 438         return 0;
 439 }
 440
 441 static int mvs_task_prep_ata(struct mvs_info *mvi,
 442                              struct mvs_task_exec_info *tei)
 443 {
 444         struct sas_ha_struct *sha = mvi->sas;
 445         struct sas_task *task = tei->task;
 446         struct domain_device *dev = task->dev;
 447         struct mvs_device *mvi_dev = dev->lldd_dev;
 448         struct mvs_cmd_hdr *hdr = tei->hdr;
 449         struct asd_sas_port *sas_port = dev->port;
 450         struct sas_phy *sphy = dev->phy;
 451         struct asd_sas_phy *sas_phy = sha->sas_phy[sphy->number];
 452         struct mvs_slot_info *slot;
 453         void *buf_prd;
 454         u32 tag = tei->tag, hdr_tag;
 455         u32 flags, del_q;
 456         void *buf_tmp;
 457         u8 *buf_cmd, *buf_oaf;
 458         dma_addr_t buf_tmp_dma;
 459         u32 i, req_len, resp_len;
 460         const u32 max_resp_len = SB_RFB_MAX;
 461
 462         if (mvs_assign_reg_set(mvi, mvi_dev) == MVS_ID_NOT_MAPPED) {
 463                 mv_dprintk("Have not enough regiset for dev %d.\n",
 464                         mvi_dev->device_id);
 465                 return -EBUSY;
 466         }
 467         slot = &mvi->slot_info[tag];
 468         slot->tx = mvi->tx_prod;
 469         del_q = TXQ_MODE_I | tag |
 470                 (TXQ_CMD_STP << TXQ_CMD_SHIFT) |
 471                 (MVS_PHY_ID << TXQ_PHY_SHIFT) |
 472                 (mvi_dev->taskfileset << TXQ_SRS_SHIFT);
 473         mvi->tx[mvi->tx_prod] = cpu_to_le32(del_q);
 474
 475         if (task->data_dir == DMA_FROM_DEVICE)
 476                 flags = (MVS_CHIP_DISP->prd_count() << MCH_PRD_LEN_SHIFT);
 477         else
 478                 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 479
 480         if (task->ata_task.use_ncq)
 481                 flags |= MCH_FPDMA;
 482         if (dev->sata_dev.command_set == ATAPI_COMMAND_SET) {
 483                 if (task->ata_task.fis.command != ATA_CMD_ID_ATAPI)
 484                         flags |= MCH_ATAPI;
 485         }
 486
 487         hdr->flags = cpu_to_le32(flags);
 488
 489         if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr_tag))
 490                 task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3);
 491         else
 492                 hdr_tag = tag;
 493
 494         hdr->tags = cpu_to_le32(hdr_tag);
 495
 496         hdr->data_len = cpu_to_le32(task->total_xfer_len);
 497
 498         /*
 499          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 500          */
 501
 502         /* region 1: command table area (MVS_ATA_CMD_SZ bytes) ************** */
 503         buf_cmd = buf_tmp = slot->buf;
 504         buf_tmp_dma = slot->buf_dma;
 505
 506         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 507
 508         buf_tmp += MVS_ATA_CMD_SZ;
 509         buf_tmp_dma += MVS_ATA_CMD_SZ;
 510
 511         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 512         /* used for STP.  unused for SATA? */
 513         buf_oaf = buf_tmp;
 514         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 515
 516         buf_tmp += MVS_OAF_SZ;
 517         buf_tmp_dma += MVS_OAF_SZ;
 518
 519         /* region 3: PRD table ********************************************* */
 520         buf_prd = buf_tmp;
 521
 522         if (tei->n_elem)
 523                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 524         else
 525                 hdr->prd_tbl = 0;
 526         i = MVS_CHIP_DISP->prd_size() * MVS_CHIP_DISP->prd_count();
 527
 528         buf_tmp += i;
 529         buf_tmp_dma += i;
 530
 531         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 532         slot->response = buf_tmp;
 533         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 534         if (mvi->flags & MVF_FLAG_SOC)
 535                 hdr->reserved[0] = 0;
 536
 537         req_len = sizeof(struct host_to_dev_fis);
 538         resp_len = MVS_SLOT_BUF_SZ - MVS_ATA_CMD_SZ -
 539             sizeof(struct mvs_err_info) - i;
 540
 541         /* request, response lengths */
 542         resp_len = min(resp_len, max_resp_len);
 543         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 544
 545         if (likely(!task->ata_task.device_control_reg_update))
 546                 task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
 547         /* fill in command FIS and ATAPI CDB */
 548         memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
 549         if (dev->sata_dev.command_set == ATAPI_COMMAND_SET)
 550                 memcpy(buf_cmd + STP_ATAPI_CMD,
 551                         task->ata_task.atapi_packet, 16);
 552
 553         /* generate open address frame hdr (first 12 bytes) */
 554         /* initiator, STP, ftype 1h */
 555         buf_oaf[0] = (1 << 7) | (PROTOCOL_STP << 4) | 0x1;
 556         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 557         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 558         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 559
 560         /* fill in PRD (scatter/gather) table, if any */
 561         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 562
 563         if (task->data_dir == DMA_FROM_DEVICE)
 564                 MVS_CHIP_DISP->dma_fix(mvi, sas_port->phy_mask,
 565                                 TRASH_BUCKET_SIZE, tei->n_elem, buf_prd);
 566
 567         return 0;
 568 }
 569
 570 static int mvs_task_prep_ssp(struct mvs_info *mvi,
 571                              struct mvs_task_exec_info *tei, int is_tmf,
 572                              struct mvs_tmf_task *tmf)
 573 {
 574         struct sas_task *task = tei->task;
 575         struct mvs_cmd_hdr *hdr = tei->hdr;
 576         struct mvs_port *port = tei->port;
 577         struct domain_device *dev = task->dev;
 578         struct mvs_device *mvi_dev = dev->lldd_dev;
 579         struct asd_sas_port *sas_port = dev->port;
 580         struct mvs_slot_info *slot;
 581         void *buf_prd;
 582         struct ssp_frame_hdr *ssp_hdr;
 583         void *buf_tmp;
 584         u8 *buf_cmd, *buf_oaf, fburst = 0;
 585         dma_addr_t buf_tmp_dma;
 586         u32 flags;
 587         u32 resp_len, req_len, i, tag = tei->tag;
 588         const u32 max_resp_len = SB_RFB_MAX;
 589         u32 phy_mask;
 590
 591         slot = &mvi->slot_info[tag];
 592
 593         phy_mask = ((port->wide_port_phymap) ? port->wide_port_phymap :
 594                 sas_port->phy_mask) & TXQ_PHY_MASK;
 595
 596         slot->tx = mvi->tx_prod;
 597         mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag |
 598                                 (TXQ_CMD_SSP << TXQ_CMD_SHIFT) |
 599                                 (phy_mask << TXQ_PHY_SHIFT));
 600
 601         flags = MCH_RETRY;
 602         if (task->ssp_task.enable_first_burst) {
 603                 flags |= MCH_FBURST;
 604                 fburst = (1 << 7);
 605         }
 606         if (is_tmf)
 607                 flags |= (MCH_SSP_FR_TASK << MCH_SSP_FR_TYPE_SHIFT);
 608         else
 609                 flags |= (MCH_SSP_FR_CMD << MCH_SSP_FR_TYPE_SHIFT);
 610
 611         hdr->flags = cpu_to_le32(flags | (tei->n_elem << MCH_PRD_LEN_SHIFT));
 612         hdr->tags = cpu_to_le32(tag);
 613         hdr->data_len = cpu_to_le32(task->total_xfer_len);
 614
 615         /*
 616          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 617          */
 618
 619         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ************** */
 620         buf_cmd = buf_tmp = slot->buf;
 621         buf_tmp_dma = slot->buf_dma;
 622
 623         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 624
 625         buf_tmp += MVS_SSP_CMD_SZ;
 626         buf_tmp_dma += MVS_SSP_CMD_SZ;
 627
 628         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 629         buf_oaf = buf_tmp;
 630         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 631
 632         buf_tmp += MVS_OAF_SZ;
 633         buf_tmp_dma += MVS_OAF_SZ;
 634
 635         /* region 3: PRD table ********************************************* */
 636         buf_prd = buf_tmp;
 637         if (tei->n_elem)
 638                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 639         else
 640                 hdr->prd_tbl = 0;
 641
 642         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 643         buf_tmp += i;
 644         buf_tmp_dma += i;
 645
 646         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 647         slot->response = buf_tmp;
 648         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 649         if (mvi->flags & MVF_FLAG_SOC)
 650                 hdr->reserved[0] = 0;
 651
 652         resp_len = MVS_SLOT_BUF_SZ - MVS_SSP_CMD_SZ - MVS_OAF_SZ -
 653             sizeof(struct mvs_err_info) - i;
 654         resp_len = min(resp_len, max_resp_len);
 655
 656         req_len = sizeof(struct ssp_frame_hdr) + 28;
 657
 658         /* request, response lengths */
 659         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 660
 661         /* generate open address frame hdr (first 12 bytes) */
 662         /* initiator, SSP, ftype 1h */
 663         buf_oaf[0] = (1 << 7) | (PROTOCOL_SSP << 4) | 0x1;
 664         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 665         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 666         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 667
 668         /* fill in SSP frame header (Command Table.SSP frame header) */
 669         ssp_hdr = (struct ssp_frame_hdr *)buf_cmd;
 670
 671         if (is_tmf)
 672                 ssp_hdr->frame_type = SSP_TASK;
 673         else
 674                 ssp_hdr->frame_type = SSP_COMMAND;
 675
 676         memcpy(ssp_hdr->hashed_dest_addr, dev->hashed_sas_addr,
 677                HASHED_SAS_ADDR_SIZE);
 678         memcpy(ssp_hdr->hashed_src_addr,
 679                dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
 680         ssp_hdr->tag = cpu_to_be16(tag);
 681
 682         /* fill in IU for TASK and Command Frame */
 683         buf_cmd += sizeof(*ssp_hdr);
 684         memcpy(buf_cmd, &task->ssp_task.LUN, 8);
 685
 686         if (ssp_hdr->frame_type != SSP_TASK) {
 687                 buf_cmd[9] = fburst | task->ssp_task.task_attr |
 688                                 (task->ssp_task.task_prio << 3);
 689                 memcpy(buf_cmd + 12, task->ssp_task.cmd->cmnd,
 690                        task->ssp_task.cmd->cmd_len);
 691         } else{
 692                 buf_cmd[10] = tmf->tmf;
 693                 switch (tmf->tmf) {
 694                 case TMF_ABORT_TASK:
 695                 case TMF_QUERY_TASK:
 696                         buf_cmd[12] =
 697                                 (tmf->tag_of_task_to_be_managed >> 8) & 0xff;
 698                         buf_cmd[13] =
 699                                 tmf->tag_of_task_to_be_managed & 0xff;
 700                         break;
 701                 default:
 702                         break;
 703                 }
 704         }
 705         /* fill in PRD (scatter/gather) table, if any */
 706         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 707         return 0;
 708 }
 709
 710 #define DEV_IS_GONE(mvi_dev)    ((!mvi_dev || (mvi_dev->dev_type == SAS_PHY_UNUSED)))
 711 static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf,
 712                                 struct mvs_tmf_task *tmf, int *pass)
 713 {
 714         struct domain_device *dev = task->dev;
 715         struct mvs_device *mvi_dev = dev->lldd_dev;
 716         struct mvs_task_exec_info tei;
 717         struct mvs_slot_info *slot;
 718         u32 tag = 0xdeadbeef, n_elem = 0;
 719         int rc = 0;
 720
 721         if (!dev->port) {
 722                 struct task_status_struct *tsm = &task->task_status;
 723
 724                 tsm->resp = SAS_TASK_UNDELIVERED;
 725                 tsm->stat = SAS_PHY_DOWN;
 726                 /*
 727                  * libsas will use dev->port, should
 728                  * not call task_done for sata
 729                  */
 730                 if (dev->dev_type != SAS_SATA_DEV)
 731                         task->task_done(task);
 732                 return rc;
 733         }
 734
 735         if (DEV_IS_GONE(mvi_dev)) {
 736                 if (mvi_dev)
 737                         mv_dprintk("device %d not ready.\n",
 738                                 mvi_dev->device_id);
 739                 else
 740                         mv_dprintk("device %016llx not ready.\n",
 741                                 SAS_ADDR(dev->sas_addr));
 742
 743                         rc = SAS_PHY_DOWN;
 744                         return rc;
 745         }
 746         tei.port = dev->port->lldd_port;
 747         if (tei.port && !tei.port->port_attached && !tmf) {
 748                 if (sas_protocol_ata(task->task_proto)) {
 749                         struct task_status_struct *ts = &task->task_status;
 750                         mv_dprintk("SATA/STP port %d does not attach"
 751                                         "device.\n", dev->port->id);
 752                         ts->resp = SAS_TASK_COMPLETE;
 753                         ts->stat = SAS_PHY_DOWN;
 754
 755                         task->task_done(task);
 756
 757                 } else {
 758                         struct task_status_struct *ts = &task->task_status;
 759                         mv_dprintk("SAS port %d does not attach"
 760                                 "device.\n", dev->port->id);
 761                         ts->resp = SAS_TASK_UNDELIVERED;
 762                         ts->stat = SAS_PHY_DOWN;
 763                         task->task_done(task);
 764                 }
 765                 return rc;
 766         }
 767
 768         if (!sas_protocol_ata(task->task_proto)) {
 769                 if (task->num_scatter) {
 770                         n_elem = dma_map_sg(mvi->dev,
 771                                             task->scatter,
 772                                             task->num_scatter,
 773                                             task->data_dir);
 774                         if (!n_elem) {
 775                                 rc = -ENOMEM;
 776                                 goto prep_out;
 777                         }
 778                 }
 779         } else {
 780                 n_elem = task->num_scatter;
 781         }
 782
 783         rc = mvs_tag_alloc(mvi, &tag);
 784         if (rc)
 785                 goto err_out;
 786
 787         slot = &mvi->slot_info[tag];
 788
 789         task->lldd_task = NULL;
 790         slot->n_elem = n_elem;
 791         slot->slot_tag = tag;
 792
 793         slot->buf = pci_pool_alloc(mvi->dma_pool, GFP_ATOMIC, &slot->buf_dma);
 794         if (!slot->buf)
 795                 goto err_out_tag;
 796         memset(slot->buf, 0, MVS_SLOT_BUF_SZ);
 797
 798         tei.task = task;
 799         tei.hdr = &mvi->slot[tag];
 800         tei.tag = tag;
 801         tei.n_elem = n_elem;
 802         switch (task->task_proto) {
 803         case SAS_PROTOCOL_SMP:
 804                 rc = mvs_task_prep_smp(mvi, &tei);
 805                 break;
 806         case SAS_PROTOCOL_SSP:
 807                 rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf);
 808                 break;
 809         case SAS_PROTOCOL_SATA:
 810         case SAS_PROTOCOL_STP:
 811         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 812                 rc = mvs_task_prep_ata(mvi, &tei);
 813                 break;
 814         default:
 815                 dev_printk(KERN_ERR, mvi->dev,
 816                         "unknown sas_task proto: 0x%x\n",
 817                         task->task_proto);
 818                 rc = -EINVAL;
 819                 break;
 820         }
 821
 822         if (rc) {
 823                 mv_dprintk("rc is %x\n", rc);
 824                 goto err_out_slot_buf;
 825         }
 826         slot->task = task;
 827         slot->port = tei.port;
 828         task->lldd_task = slot;
 829         list_add_tail(&slot->entry, &tei.port->list);
 830         spin_lock(&task->task_state_lock);
 831         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 832         spin_unlock(&task->task_state_lock);
 833
 834         mvi_dev->running_req++;
 835         ++(*pass);
 836         mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
 837
 838         return rc;
 839
 840 err_out_slot_buf:
 841         pci_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
 842 err_out_tag:
 843         mvs_tag_free(mvi, tag);
 844 err_out:
 845
 846         dev_printk(KERN_ERR, mvi->dev, "mvsas prep failed[%d]!\n", rc);
 847         if (!sas_protocol_ata(task->task_proto))
 848                 if (n_elem)
 849                         dma_unmap_sg(mvi->dev, task->scatter, n_elem,
 850                                      task->data_dir);
 851 prep_out:
 852         return rc;
 853 }
 854
 855 static int mvs_task_exec(struct sas_task *task, gfp_t gfp_flags,
 856                                 struct completion *completion, int is_tmf,
 857                                 struct mvs_tmf_task *tmf)
 858 {
 859         struct mvs_info *mvi = NULL;
 860         u32 rc = 0;
 861         u32 pass = 0;
 862         unsigned long flags = 0;
 863
 864         mvi = ((struct mvs_device *)task->dev->lldd_dev)->mvi_info;
 865
 866         spin_lock_irqsave(&mvi->lock, flags);
 867         rc = mvs_task_prep(task, mvi, is_tmf, tmf, &pass);
 868         if (rc)
 869                 dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
 870
 871         if (likely(pass))
 872                         MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) &
 873                                 (MVS_CHIP_SLOT_SZ - 1));
 874         spin_unlock_irqrestore(&mvi->lock, flags);
 875
 876         return rc;
 877 }
 878
 879 int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags)
 880 {
 881         return mvs_task_exec(task, gfp_flags, NULL, 0, NULL);
 882 }
 883
 884 static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc)
 885 {
 886         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
 887         mvs_tag_clear(mvi, slot_idx);
 888 }
 889
 890 static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task,
 891                           struct mvs_slot_info *slot, u32 slot_idx)
 892 {
 893         if (!slot->task)
 894                 return;
 895         if (!sas_protocol_ata(task->task_proto))
 896                 if (slot->n_elem)
 897                         dma_unmap_sg(mvi->dev, task->scatter,
 898                                      slot->n_elem, task->data_dir);
 899
 900         switch (task->task_proto) {
 901         case SAS_PROTOCOL_SMP:
 902                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_resp, 1,
 903                              PCI_DMA_FROMDEVICE);
 904                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_req, 1,
 905                              PCI_DMA_TODEVICE);
 906                 break;
 907
 908         case SAS_PROTOCOL_SATA:
 909         case SAS_PROTOCOL_STP:
 910         case SAS_PROTOCOL_SSP:
 911         default:
 912                 /* do nothing */
 913                 break;
 914         }
 915
 916         if (slot->buf) {
 917                 pci_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
 918                 slot->buf = NULL;
 919         }
 920         list_del_init(&slot->entry);
 921         task->lldd_task = NULL;
 922         slot->task = NULL;
 923         slot->port = NULL;
 924         slot->slot_tag = 0xFFFFFFFF;
 925         mvs_slot_free(mvi, slot_idx);
 926 }
 927
 928 static void mvs_update_wideport(struct mvs_info *mvi, int phy_no)
 929 {
 930         struct mvs_phy *phy = &mvi->phy[phy_no];
 931         struct mvs_port *port = phy->port;
 932         int j, no;
 933
 934         for_each_phy(port->wide_port_phymap, j, no) {
 935                 if (j & 1) {
 936                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
 937                                                 PHYR_WIDE_PORT);
 938                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
 939                                                 port->wide_port_phymap);
 940                 } else {
 941                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
 942                                                 PHYR_WIDE_PORT);
 943                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
 944                                                 0);
 945                 }
 946         }
 947 }
 948
 949 static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i)
 950 {
 951         u32 tmp;
 952         struct mvs_phy *phy = &mvi->phy[i];
 953         struct mvs_port *port = phy->port;
 954
 955         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, i);
 956         if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) {
 957                 if (!port)
 958                         phy->phy_attached = 1;
 959                 return tmp;
 960         }
 961
 962         if (port) {
 963                 if (phy->phy_type & PORT_TYPE_SAS) {
 964                         port->wide_port_phymap &= ~(1U << i);
 965                         if (!port->wide_port_phymap)
 966                                 port->port_attached = 0;
 967                         mvs_update_wideport(mvi, i);
 968                 } else if (phy->phy_type & PORT_TYPE_SATA)
 969                         port->port_attached = 0;
 970                 phy->port = NULL;
 971                 phy->phy_attached = 0;
 972                 phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);
 973         }
 974         return 0;
 975 }
 976
 977 static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf)
 978 {
 979         u32 *s = (u32 *) buf;
 980
 981         if (!s)
 982                 return NULL;
 983
 984         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG3);
 985         s[3] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 986
 987         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG2);
 988         s[2] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 989
 990         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG1);
 991         s[1] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 992
 993         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG0);
 994         s[0] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 995
 996         if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01))
 997                 s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10);
 998
 999         return s;
1000 }
1001
1002 static u32 mvs_is_sig_fis_received(u32 irq_status)
1003 {
1004         return irq_status & PHYEV_SIG_FIS;
1005 }
1006
1007 static void mvs_sig_remove_timer(struct mvs_phy *phy)
1008 {
1009         if (phy->timer.function)
1010                 del_timer(&phy->timer);
1011         phy->timer.function = NULL;
1012 }
1013
1014 void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st)
1015 {
1016         struct mvs_phy *phy = &mvi->phy[i];
1017         struct sas_identify_frame *id;
1018
1019         id = (struct sas_identify_frame *)phy->frame_rcvd;
1020
1021         if (get_st) {
1022                 phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, i);
1023                 phy->phy_status = mvs_is_phy_ready(mvi, i);
1024         }
1025
1026         if (phy->phy_status) {
1027                 int oob_done = 0;
1028                 struct asd_sas_phy *sas_phy = &mvi->phy[i].sas_phy;
1029
1030                 oob_done = MVS_CHIP_DISP->oob_done(mvi, i);
1031
1032                 MVS_CHIP_DISP->fix_phy_info(mvi, i, id);
1033                 if (phy->phy_type & PORT_TYPE_SATA) {
1034                         phy->identify.target_port_protocols = SAS_PROTOCOL_STP;
1035                         if (mvs_is_sig_fis_received(phy->irq_status)) {
1036                                 mvs_sig_remove_timer(phy);
1037                                 phy->phy_attached = 1;
1038                                 phy->att_dev_sas_addr =
1039                                         i + mvi->id * mvi->chip->n_phy;
1040                                 if (oob_done)
1041                                         sas_phy->oob_mode = SATA_OOB_MODE;
1042                                 phy->frame_rcvd_size =
1043                                     sizeof(struct dev_to_host_fis);
1044                                 mvs_get_d2h_reg(mvi, i, id);
1045                         } else {
1046                                 u32 tmp;
1047                                 dev_printk(KERN_DEBUG, mvi->dev,
1048                                         "Phy%d : No sig fis\n", i);
1049                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, i);
1050                                 MVS_CHIP_DISP->write_port_irq_mask(mvi, i,
1051                                                 tmp | PHYEV_SIG_FIS);
1052                                 phy->phy_attached = 0;
1053                                 phy->phy_type &= ~PORT_TYPE_SATA;
1054                                 goto out_done;
1055                         }
1056                 }       else if (phy->phy_type & PORT_TYPE_SAS
1057                         || phy->att_dev_info & PORT_SSP_INIT_MASK) {
1058                         phy->phy_attached = 1;
1059                         phy->identify.device_type =
1060                                 phy->att_dev_info & PORT_DEV_TYPE_MASK;
1061
1062                         if (phy->identify.device_type == SAS_END_DEVICE)
1063                                 phy->identify.target_port_protocols =
1064                                                         SAS_PROTOCOL_SSP;
1065                         else if (phy->identify.device_type != SAS_PHY_UNUSED)
1066                                 phy->identify.target_port_protocols =
1067                                                         SAS_PROTOCOL_SMP;
1068                         if (oob_done)
1069                                 sas_phy->oob_mode = SAS_OOB_MODE;
1070                         phy->frame_rcvd_size =
1071                             sizeof(struct sas_identify_frame);
1072                 }
1073                 memcpy(sas_phy->attached_sas_addr,
1074                         &phy->att_dev_sas_addr, SAS_ADDR_SIZE);
1075
1076                 if (MVS_CHIP_DISP->phy_work_around)
1077                         MVS_CHIP_DISP->phy_work_around(mvi, i);
1078         }
1079         mv_dprintk("phy %d attach dev info is %x\n",
1080                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_info);
1081         mv_dprintk("phy %d attach sas addr is %llx\n",
1082                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_sas_addr);
1083 out_done:
1084         if (get_st)
1085                 MVS_CHIP_DISP->write_port_irq_stat(mvi, i, phy->irq_status);
1086 }
1087
1088 static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
1089 {
1090         struct sas_ha_struct *sas_ha = sas_phy->ha;
1091         struct mvs_info *mvi = NULL; int i = 0, hi;
1092         struct mvs_phy *phy = sas_phy->lldd_phy;
1093         struct asd_sas_port *sas_port = sas_phy->port;
1094         struct mvs_port *port;
1095         unsigned long flags = 0;
1096         if (!sas_port)
1097                 return;
1098
1099         while (sas_ha->sas_phy[i]) {
1100                 if (sas_ha->sas_phy[i] == sas_phy)
1101                         break;
1102                 i++;
1103         }
1104         hi = i/((struct mvs_prv_info *)sas_ha->lldd_ha)->n_phy;
1105         mvi = ((struct mvs_prv_info *)sas_ha->lldd_ha)->mvi[hi];
1106         if (i >= mvi->chip->n_phy)
1107                 port = &mvi->port[i - mvi->chip->n_phy];
1108         else
1109                 port = &mvi->port[i];
1110         if (lock)
1111                 spin_lock_irqsave(&mvi->lock, flags);
1112         port->port_attached = 1;
1113         phy->port = port;
1114         sas_port->lldd_port = port;
1115         if (phy->phy_type & PORT_TYPE_SAS) {
1116                 port->wide_port_phymap = sas_port->phy_mask;
1117                 mv_printk("set wide port phy map %x\n", sas_port->phy_mask);
1118                 mvs_update_wideport(mvi, sas_phy->id);
1119
1120                 /* direct attached SAS device */
1121                 if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
1122                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
1123                         MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x04);
1124                 }
1125         }
1126         if (lock)
1127                 spin_unlock_irqrestore(&mvi->lock, flags);
1128 }
1129
1130 static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock)
1131 {
1132         struct domain_device *dev;
1133         struct mvs_phy *phy = sas_phy->lldd_phy;
1134         struct mvs_info *mvi = phy->mvi;
1135         struct asd_sas_port *port = sas_phy->port;
1136         int phy_no = 0;
1137
1138         while (phy != &mvi->phy[phy_no]) {
1139                 phy_no++;
1140                 if (phy_no >= MVS_MAX_PHYS)
1141                         return;
1142         }
1143         list_for_each_entry(dev, &port->dev_list, dev_list_node)
1144                 mvs_do_release_task(phy->mvi, phy_no, dev);
1145
1146 }
1147
1148
1149 void mvs_port_formed(struct asd_sas_phy *sas_phy)
1150 {
1151         mvs_port_notify_formed(sas_phy, 1);
1152 }
1153
1154 void mvs_port_deformed(struct asd_sas_phy *sas_phy)
1155 {
1156         mvs_port_notify_deformed(sas_phy, 1);
1157 }
1158
1159 struct mvs_device *mvs_alloc_dev(struct mvs_info *mvi)
1160 {
1161         u32 dev;
1162         for (dev = 0; dev < MVS_MAX_DEVICES; dev++) {
1163                 if (mvi->devices[dev].dev_type == SAS_PHY_UNUSED) {
1164                         mvi->devices[dev].device_id = dev;
1165                         return &mvi->devices[dev];
1166                 }
1167         }
1168
1169         if (dev == MVS_MAX_DEVICES)
1170                 mv_printk("max support %d devices, ignore ..\n",
1171                         MVS_MAX_DEVICES);
1172
1173         return NULL;
1174 }
1175
1176 void mvs_free_dev(struct mvs_device *mvi_dev)
1177 {
1178         u32 id = mvi_dev->device_id;
1179         memset(mvi_dev, 0, sizeof(*mvi_dev));
1180         mvi_dev->device_id = id;
1181         mvi_dev->dev_type = SAS_PHY_UNUSED;
1182         mvi_dev->dev_status = MVS_DEV_NORMAL;
1183         mvi_dev->taskfileset = MVS_ID_NOT_MAPPED;
1184 }
1185
1186 int mvs_dev_found_notify(struct domain_device *dev, int lock)
1187 {
1188         unsigned long flags = 0;
1189         int res = 0;
1190         struct mvs_info *mvi = NULL;
1191         struct domain_device *parent_dev = dev->parent;
1192         struct mvs_device *mvi_device;
1193
1194         mvi = mvs_find_dev_mvi(dev);
1195
1196         if (lock)
1197                 spin_lock_irqsave(&mvi->lock, flags);
1198
1199         mvi_device = mvs_alloc_dev(mvi);
1200         if (!mvi_device) {
1201                 res = -1;
1202                 goto found_out;
1203         }
1204         dev->lldd_dev = mvi_device;
1205         mvi_device->dev_status = MVS_DEV_NORMAL;
1206         mvi_device->dev_type = dev->dev_type;
1207         mvi_device->mvi_info = mvi;
1208         mvi_device->sas_device = dev;
1209         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
1210                 int phy_id;
1211                 u8 phy_num = parent_dev->ex_dev.num_phys;
1212                 struct ex_phy *phy;
1213                 for (phy_id = 0; phy_id < phy_num; phy_id++) {
1214                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
1215                         if (SAS_ADDR(phy->attached_sas_addr) ==
1216                                 SAS_ADDR(dev->sas_addr)) {
1217                                 mvi_device->attached_phy = phy_id;
1218                                 break;
1219                         }
1220                 }
1221
1222                 if (phy_id == phy_num) {
1223                         mv_printk("Error: no attached dev:%016llx"
1224                                 "at ex:%016llx.\n",
1225                                 SAS_ADDR(dev->sas_addr),
1226                                 SAS_ADDR(parent_dev->sas_addr));
1227                         res = -1;
1228                 }
1229         }
1230
1231 found_out:
1232         if (lock)
1233                 spin_unlock_irqrestore(&mvi->lock, flags);
1234         return res;
1235 }
1236
1237 int mvs_dev_found(struct domain_device *dev)
1238 {
1239         return mvs_dev_found_notify(dev, 1);
1240 }
1241
1242 void mvs_dev_gone_notify(struct domain_device *dev)
1243 {
1244         unsigned long flags = 0;
1245         struct mvs_device *mvi_dev = dev->lldd_dev;
1246         struct mvs_info *mvi;
1247
1248         if (!mvi_dev) {
1249                 mv_dprintk("found dev has gone.\n");
1250                 return;
1251         }
1252
1253         mvi = mvi_dev->mvi_info;
1254
1255         spin_lock_irqsave(&mvi->lock, flags);
1256
1257         mv_dprintk("found dev[%d:%x] is gone.\n",
1258                 mvi_dev->device_id, mvi_dev->dev_type);
1259         mvs_release_task(mvi, dev);
1260         mvs_free_reg_set(mvi, mvi_dev);
1261         mvs_free_dev(mvi_dev);
1262
1263         dev->lldd_dev = NULL;
1264         mvi_dev->sas_device = NULL;
1265
1266         spin_unlock_irqrestore(&mvi->lock, flags);
1267 }
1268
1269
1270 void mvs_dev_gone(struct domain_device *dev)
1271 {
1272         mvs_dev_gone_notify(dev);
1273 }
1274
1275 static void mvs_task_done(struct sas_task *task)
1276 {
1277         if (!del_timer(&task->slow_task->timer))
1278                 return;
1279         complete(&task->slow_task->completion);
1280 }
1281
1282 static void mvs_tmf_timedout(unsigned long data)
1283 {
1284         struct sas_task *task = (struct sas_task *)data;
1285
1286         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1287         complete(&task->slow_task->completion);
1288 }
1289
1290 #define MVS_TASK_TIMEOUT 20
1291 static int mvs_exec_internal_tmf_task(struct domain_device *dev,
1292                         void *parameter, u32 para_len, struct mvs_tmf_task *tmf)
1293 {
1294         int res, retry;
1295         struct sas_task *task = NULL;
1296
1297         for (retry = 0; retry < 3; retry++) {
1298                 task = sas_alloc_slow_task(GFP_KERNEL);
1299                 if (!task)
1300                         return -ENOMEM;
1301
1302                 task->dev = dev;
1303                 task->task_proto = dev->tproto;
1304
1305                 memcpy(&task->ssp_task, parameter, para_len);
1306                 task->task_done = mvs_task_done;
1307
1308                 task->slow_task->timer.data = (unsigned long) task;
1309                 task->slow_task->timer.function = mvs_tmf_timedout;
1310                 task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ;
1311                 add_timer(&task->slow_task->timer);
1312
1313                 res = mvs_task_exec(task, GFP_KERNEL, NULL, 1, tmf);
1314
1315                 if (res) {
1316                         del_timer(&task->slow_task->timer);
1317                         mv_printk("executing internal task failed:%d\n", res);
1318                         goto ex_err;
1319                 }
1320
1321                 wait_for_completion(&task->slow_task->completion);
1322                 res = TMF_RESP_FUNC_FAILED;
1323                 /* Even TMF timed out, return direct. */
1324                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1325                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1326                                 mv_printk("TMF task[%x] timeout.\n", tmf->tmf);
1327                                 goto ex_err;
1328                         }
1329                 }
1330
1331                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1332                     task->task_status.stat == SAM_STAT_GOOD) {
1333                         res = TMF_RESP_FUNC_COMPLETE;
1334                         break;
1335                 }
1336
1337                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1338                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1339                         /* no error, but return the number of bytes of
1340                          * underrun */
1341                         res = task->task_status.residual;
1342                         break;
1343                 }
1344
1345                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1346                       task->task_status.stat == SAS_DATA_OVERRUN) {
1347                         mv_dprintk("blocked task error.\n");
1348                         res = -EMSGSIZE;
1349                         break;
1350                 } else {
1351                         mv_dprintk(" task to dev %016llx response: 0x%x "
1352                                     "status 0x%x\n",
1353                                     SAS_ADDR(dev->sas_addr),
1354                                     task->task_status.resp,
1355                                     task->task_status.stat);
1356                         sas_free_task(task);
1357                         task = NULL;
1358
1359                 }
1360         }
1361 ex_err:
1362         BUG_ON(retry == 3 && task != NULL);
1363         sas_free_task(task);
1364         return res;
1365 }
1366
1367 static int mvs_debug_issue_ssp_tmf(struct domain_device *dev,
1368                                 u8 *lun, struct mvs_tmf_task *tmf)
1369 {
1370         struct sas_ssp_task ssp_task;
1371         if (!(dev->tproto & SAS_PROTOCOL_SSP))
1372                 return TMF_RESP_FUNC_ESUPP;
1373
1374         memcpy(ssp_task.LUN, lun, 8);
1375
1376         return mvs_exec_internal_tmf_task(dev, &ssp_task,
1377                                 sizeof(ssp_task), tmf);
1378 }
1379
1380
1381 /*  Standard mandates link reset for ATA  (type 0)
1382     and hard reset for SSP (type 1) , only for RECOVERY */
1383 static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
1384 {
1385         int rc;
1386         struct sas_phy *phy = sas_get_local_phy(dev);
1387         int reset_type = (dev->dev_type == SAS_SATA_DEV ||
1388                         (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1389         rc = sas_phy_reset(phy, reset_type);
1390         sas_put_local_phy(phy);
1391         msleep(2000);
1392         return rc;
1393 }
1394
1395 /* mandatory SAM-3 */
1396 int mvs_lu_reset(struct domain_device *dev, u8 *lun)
1397 {
1398         unsigned long flags;
1399         int rc = TMF_RESP_FUNC_FAILED;
1400         struct mvs_tmf_task tmf_task;
1401         struct mvs_device * mvi_dev = dev->lldd_dev;
1402         struct mvs_info *mvi = mvi_dev->mvi_info;
1403
1404         tmf_task.tmf = TMF_LU_RESET;
1405         mvi_dev->dev_status = MVS_DEV_EH;
1406         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1407         if (rc == TMF_RESP_FUNC_COMPLETE) {
1408                 spin_lock_irqsave(&mvi->lock, flags);
1409                 mvs_release_task(mvi, dev);
1410                 spin_unlock_irqrestore(&mvi->lock, flags);
1411         }
1412         /* If failed, fall-through I_T_Nexus reset */
1413         mv_printk("%s for device[%x]:rc= %d\n", __func__,
1414                         mvi_dev->device_id, rc);
1415         return rc;
1416 }
1417
1418 int mvs_I_T_nexus_reset(struct domain_device *dev)
1419 {
1420         unsigned long flags;
1421         int rc = TMF_RESP_FUNC_FAILED;
1422     struct mvs_device * mvi_dev = (struct mvs_device *)dev->lldd_dev;
1423         struct mvs_info *mvi = mvi_dev->mvi_info;
1424
1425         if (mvi_dev->dev_status != MVS_DEV_EH)
1426                 return TMF_RESP_FUNC_COMPLETE;
1427         else
1428                 mvi_dev->dev_status = MVS_DEV_NORMAL;
1429         rc = mvs_debug_I_T_nexus_reset(dev);
1430         mv_printk("%s for device[%x]:rc= %d\n",
1431                 __func__, mvi_dev->device_id, rc);
1432
1433         spin_lock_irqsave(&mvi->lock, flags);
1434         mvs_release_task(mvi, dev);
1435         spin_unlock_irqrestore(&mvi->lock, flags);
1436
1437         return rc;
1438 }
1439 /* optional SAM-3 */
1440 int mvs_query_task(struct sas_task *task)
1441 {
1442         u32 tag;
1443         struct scsi_lun lun;
1444         struct mvs_tmf_task tmf_task;
1445         int rc = TMF_RESP_FUNC_FAILED;
1446
1447         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1448                 struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1449                 struct domain_device *dev = task->dev;
1450                 struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1451                 struct mvs_info *mvi = mvi_dev->mvi_info;
1452
1453                 int_to_scsilun(cmnd->device->lun, &lun);
1454                 rc = mvs_find_tag(mvi, task, &tag);
1455                 if (rc == 0) {
1456                         rc = TMF_RESP_FUNC_FAILED;
1457                         return rc;
1458                 }
1459
1460                 tmf_task.tmf = TMF_QUERY_TASK;
1461                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1462
1463                 rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1464                 switch (rc) {
1465                 /* The task is still in Lun, release it then */
1466                 case TMF_RESP_FUNC_SUCC:
1467                 /* The task is not in Lun or failed, reset the phy */
1468                 case TMF_RESP_FUNC_FAILED:
1469                 case TMF_RESP_FUNC_COMPLETE:
1470                         break;
1471                 }
1472         }
1473         mv_printk("%s:rc= %d\n", __func__, rc);
1474         return rc;
1475 }
1476
1477 /*  mandatory SAM-3, still need free task/slot info */
1478 int mvs_abort_task(struct sas_task *task)
1479 {
1480         struct scsi_lun lun;
1481         struct mvs_tmf_task tmf_task;
1482         struct domain_device *dev = task->dev;
1483         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1484         struct mvs_info *mvi;
1485         int rc = TMF_RESP_FUNC_FAILED;
1486         unsigned long flags;
1487         u32 tag;
1488
1489         if (!mvi_dev) {
1490                 mv_printk("Device has removed\n");
1491                 return TMF_RESP_FUNC_FAILED;
1492         }
1493
1494         mvi = mvi_dev->mvi_info;
1495
1496         spin_lock_irqsave(&task->task_state_lock, flags);
1497         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1498                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1499                 rc = TMF_RESP_FUNC_COMPLETE;
1500                 goto out;
1501         }
1502         spin_unlock_irqrestore(&task->task_state_lock, flags);
1503         mvi_dev->dev_status = MVS_DEV_EH;
1504         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1505                 struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1506
1507                 int_to_scsilun(cmnd->device->lun, &lun);
1508                 rc = mvs_find_tag(mvi, task, &tag);
1509                 if (rc == 0) {
1510                         mv_printk("No such tag in %s\n", __func__);
1511                         rc = TMF_RESP_FUNC_FAILED;
1512                         return rc;
1513                 }
1514
1515                 tmf_task.tmf = TMF_ABORT_TASK;
1516                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1517
1518                 rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1519
1520                 /* if successful, clear the task and callback forwards.*/
1521                 if (rc == TMF_RESP_FUNC_COMPLETE) {
1522                         u32 slot_no;
1523                         struct mvs_slot_info *slot;
1524
1525                         if (task->lldd_task) {
1526                                 slot = task->lldd_task;
1527                                 slot_no = (u32) (slot - mvi->slot_info);
1528                                 spin_lock_irqsave(&mvi->lock, flags);
1529                                 mvs_slot_complete(mvi, slot_no, 1);
1530                                 spin_unlock_irqrestore(&mvi->lock, flags);
1531                         }
1532                 }
1533
1534         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1535                 task->task_proto & SAS_PROTOCOL_STP) {
1536                 if (SAS_SATA_DEV == dev->dev_type) {
1537                         struct mvs_slot_info *slot = task->lldd_task;
1538                         u32 slot_idx = (u32)(slot - mvi->slot_info);
1539                         mv_dprintk("mvs_abort_task() mvi=%p task=%p "
1540                                    "slot=%p slot_idx=x%x\n",
1541                                    mvi, task, slot, slot_idx);
1542                         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1543                         mvs_slot_task_free(mvi, task, slot, slot_idx);
1544                         rc = TMF_RESP_FUNC_COMPLETE;
1545                         goto out;
1546                 }
1547
1548         }
1549 out:
1550         if (rc != TMF_RESP_FUNC_COMPLETE)
1551                 mv_printk("%s:rc= %d\n", __func__, rc);
1552         return rc;
1553 }
1554
1555 int mvs_abort_task_set(struct domain_device *dev, u8 *lun)
1556 {
1557         int rc = TMF_RESP_FUNC_FAILED;
1558         struct mvs_tmf_task tmf_task;
1559
1560         tmf_task.tmf = TMF_ABORT_TASK_SET;
1561         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1562
1563         return rc;
1564 }
1565
1566 int mvs_clear_aca(struct domain_device *dev, u8 *lun)
1567 {
1568         int rc = TMF_RESP_FUNC_FAILED;
1569         struct mvs_tmf_task tmf_task;
1570
1571         tmf_task.tmf = TMF_CLEAR_ACA;
1572         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1573
1574         return rc;
1575 }
1576
1577 int mvs_clear_task_set(struct domain_device *dev, u8 *lun)
1578 {
1579         int rc = TMF_RESP_FUNC_FAILED;
1580         struct mvs_tmf_task tmf_task;
1581
1582         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1583         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1584
1585         return rc;
1586 }
1587
1588 static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
1589                         u32 slot_idx, int err)
1590 {
1591         struct mvs_device *mvi_dev = task->dev->lldd_dev;
1592         struct task_status_struct *tstat = &task->task_status;
1593         struct ata_task_resp *resp = (struct ata_task_resp *)tstat->buf;
1594         int stat = SAM_STAT_GOOD;
1595
1596
1597         resp->frame_len = sizeof(struct dev_to_host_fis);
1598         memcpy(&resp->ending_fis[0],
1599                SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset),
1600                sizeof(struct dev_to_host_fis));
1601         tstat->buf_valid_size = sizeof(*resp);
1602         if (unlikely(err)) {
1603                 if (unlikely(err & CMD_ISS_STPD))
1604                         stat = SAS_OPEN_REJECT;
1605                 else
1606                         stat = SAS_PROTO_RESPONSE;
1607        }
1608
1609         return stat;
1610 }
1611
1612 void mvs_set_sense(u8 *buffer, int len, int d_sense,
1613                 int key, int asc, int ascq)
1614 {
1615         memset(buffer, 0, len);
1616
1617         if (d_sense) {
1618                 /* Descriptor format */
1619                 if (len < 4) {
1620                         mv_printk("Length %d of sense buffer too small to "
1621                                 "fit sense %x:%x:%x", len, key, asc, ascq);
1622                 }
1623
1624                 buffer[0] = 0x72;               /* Response Code        */
1625                 if (len > 1)
1626                         buffer[1] = key;        /* Sense Key */
1627                 if (len > 2)
1628                         buffer[2] = asc;        /* ASC  */
1629                 if (len > 3)
1630                         buffer[3] = ascq;       /* ASCQ */
1631         } else {
1632                 if (len < 14) {
1633                         mv_printk("Length %d of sense buffer too small to "
1634                                 "fit sense %x:%x:%x", len, key, asc, ascq);
1635                 }
1636
1637                 buffer[0] = 0x70;               /* Response Code        */
1638                 if (len > 2)
1639                         buffer[2] = key;        /* Sense Key */
1640                 if (len > 7)
1641                         buffer[7] = 0x0a;       /* Additional Sense Length */
1642                 if (len > 12)
1643                         buffer[12] = asc;       /* ASC */
1644                 if (len > 13)
1645                         buffer[13] = ascq; /* ASCQ */
1646         }
1647
1648         return;
1649 }
1650
1651 void mvs_fill_ssp_resp_iu(struct ssp_response_iu *iu,
1652                                 u8 key, u8 asc, u8 asc_q)
1653 {
1654         iu->datapres = 2;
1655         iu->response_data_len = 0;
1656         iu->sense_data_len = 17;
1657         iu->status = 02;
1658         mvs_set_sense(iu->sense_data, 17, 0,
1659                         key, asc, asc_q);
1660 }
1661
1662 static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task,
1663                          u32 slot_idx)
1664 {
1665         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1666         int stat;
1667         u32 err_dw0 = le32_to_cpu(*(u32 *)slot->response);
1668         u32 err_dw1 = le32_to_cpu(*((u32 *)slot->response + 1));
1669         u32 tfs = 0;
1670         enum mvs_port_type type = PORT_TYPE_SAS;
1671
1672         if (err_dw0 & CMD_ISS_STPD)
1673                 MVS_CHIP_DISP->issue_stop(mvi, type, tfs);
1674
1675         MVS_CHIP_DISP->command_active(mvi, slot_idx);
1676
1677         stat = SAM_STAT_CHECK_CONDITION;
1678         switch (task->task_proto) {
1679         case SAS_PROTOCOL_SSP:
1680         {
1681                 stat = SAS_ABORTED_TASK;
1682                 if ((err_dw0 & NO_DEST) || err_dw1 & bit(31)) {
1683                         struct ssp_response_iu *iu = slot->response +
1684                                 sizeof(struct mvs_err_info);
1685                         mvs_fill_ssp_resp_iu(iu, NOT_READY, 0x04, 01);
1686                         sas_ssp_task_response(mvi->dev, task, iu);
1687                         stat = SAM_STAT_CHECK_CONDITION;
1688                 }
1689                 if (err_dw1 & bit(31))
1690                         mv_printk("reuse same slot, retry command.\n");
1691                 break;
1692         }
1693         case SAS_PROTOCOL_SMP:
1694                 stat = SAM_STAT_CHECK_CONDITION;
1695                 break;
1696
1697         case SAS_PROTOCOL_SATA:
1698         case SAS_PROTOCOL_STP:
1699         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
1700         {
1701                 task->ata_task.use_ncq = 0;
1702                 stat = SAS_PROTO_RESPONSE;
1703                 mvs_sata_done(mvi, task, slot_idx, err_dw0);
1704         }
1705                 break;
1706         default:
1707                 break;
1708         }
1709
1710         return stat;
1711 }
1712
1713 int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
1714 {
1715         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1716         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1717         struct sas_task *task = slot->task;
1718         struct mvs_device *mvi_dev = NULL;
1719         struct task_status_struct *tstat;
1720         struct domain_device *dev;
1721         u32 aborted;
1722
1723         void *to;
1724         enum exec_status sts;
1725
1726         if (unlikely(!task || !task->lldd_task || !task->dev))
1727                 return -1;
1728
1729         tstat = &task->task_status;
1730         dev = task->dev;
1731         mvi_dev = dev->lldd_dev;
1732
1733         spin_lock(&task->task_state_lock);
1734         task->task_state_flags &=
1735                 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1736         task->task_state_flags |= SAS_TASK_STATE_DONE;
1737         /* race condition*/
1738         aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED;
1739         spin_unlock(&task->task_state_lock);
1740
1741         memset(tstat, 0, sizeof(*tstat));
1742         tstat->resp = SAS_TASK_COMPLETE;
1743
1744         if (unlikely(aborted)) {
1745                 tstat->stat = SAS_ABORTED_TASK;
1746                 if (mvi_dev && mvi_dev->running_req)
1747                         mvi_dev->running_req--;
1748                 if (sas_protocol_ata(task->task_proto))
1749                         mvs_free_reg_set(mvi, mvi_dev);
1750
1751                 mvs_slot_task_free(mvi, task, slot, slot_idx);
1752                 return -1;
1753         }
1754
1755         /* when no device attaching, go ahead and complete by error handling*/
1756         if (unlikely(!mvi_dev || flags)) {
1757                 if (!mvi_dev)
1758                         mv_dprintk("port has not device.\n");
1759                 tstat->stat = SAS_PHY_DOWN;
1760                 goto out;
1761         }
1762
1763         /*
1764          * error info record present; slot->response is 32 bit aligned but may
1765          * not be 64 bit aligned, so check for zero in two 32 bit reads
1766          */
1767         if (unlikely((rx_desc & RXQ_ERR)
1768                      && (*((u32 *)slot->response)
1769                          || *(((u32 *)slot->response) + 1)))) {
1770                 mv_dprintk("port %d slot %d rx_desc %X has error info"
1771                         "%016llX.\n", slot->port->sas_port.id, slot_idx,
1772                          rx_desc, get_unaligned_le64(slot->response));
1773                 tstat->stat = mvs_slot_err(mvi, task, slot_idx);
1774                 tstat->resp = SAS_TASK_COMPLETE;
1775                 goto out;
1776         }
1777
1778         switch (task->task_proto) {
1779         case SAS_PROTOCOL_SSP:
1780                 /* hw says status == 0, datapres == 0 */
1781                 if (rx_desc & RXQ_GOOD) {
1782                         tstat->stat = SAM_STAT_GOOD;
1783                         tstat->resp = SAS_TASK_COMPLETE;
1784                 }
1785                 /* response frame present */
1786                 else if (rx_desc & RXQ_RSP) {
1787                         struct ssp_response_iu *iu = slot->response +
1788                                                 sizeof(struct mvs_err_info);
1789                         sas_ssp_task_response(mvi->dev, task, iu);
1790                 } else
1791                         tstat->stat = SAM_STAT_CHECK_CONDITION;
1792                 break;
1793
1794         case SAS_PROTOCOL_SMP: {
1795                         struct scatterlist *sg_resp = &task->smp_task.smp_resp;
1796                         tstat->stat = SAM_STAT_GOOD;
1797                         to = kmap_atomic(sg_page(sg_resp));
1798                         memcpy(to + sg_resp->offset,
1799                                 slot->response + sizeof(struct mvs_err_info),
1800                                 sg_dma_len(sg_resp));
1801                         kunmap_atomic(to);
1802                         break;
1803                 }
1804
1805         case SAS_PROTOCOL_SATA:
1806         case SAS_PROTOCOL_STP:
1807         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: {
1808                         tstat->stat = mvs_sata_done(mvi, task, slot_idx, 0);
1809                         break;
1810                 }
1811
1812         default:
1813                 tstat->stat = SAM_STAT_CHECK_CONDITION;
1814                 break;
1815         }
1816         if (!slot->port->port_attached) {
1817                 mv_dprintk("port %d has removed.\n", slot->port->sas_port.id);
1818                 tstat->stat = SAS_PHY_DOWN;
1819         }
1820
1821
1822 out:
1823         if (mvi_dev && mvi_dev->running_req) {
1824                 mvi_dev->running_req--;
1825                 if (sas_protocol_ata(task->task_proto) && !mvi_dev->running_req)
1826                         mvs_free_reg_set(mvi, mvi_dev);
1827         }
1828         mvs_slot_task_free(mvi, task, slot, slot_idx);
1829         sts = tstat->stat;
1830
1831         spin_unlock(&mvi->lock);
1832         if (task->task_done)
1833                 task->task_done(task);
1834
1835         spin_lock(&mvi->lock);
1836
1837         return sts;
1838 }
1839
1840 void mvs_do_release_task(struct mvs_info *mvi,
1841                 int phy_no, struct domain_device *dev)
1842 {
1843         u32 slot_idx;
1844         struct mvs_phy *phy;
1845         struct mvs_port *port;
1846         struct mvs_slot_info *slot, *slot2;
1847
1848         phy = &mvi->phy[phy_no];
1849         port = phy->port;
1850         if (!port)
1851                 return;
1852         /* clean cmpl queue in case request is already finished */
1853         mvs_int_rx(mvi, false);
1854
1855
1856
1857         list_for_each_entry_safe(slot, slot2, &port->list, entry) {
1858                 struct sas_task *task;
1859                 slot_idx = (u32) (slot - mvi->slot_info);
1860                 task = slot->task;
1861
1862                 if (dev && task->dev != dev)
1863                         continue;
1864
1865                 mv_printk("Release slot [%x] tag[%x], task [%p]:\n",
1866                         slot_idx, slot->slot_tag, task);
1867                 MVS_CHIP_DISP->command_active(mvi, slot_idx);
1868
1869                 mvs_slot_complete(mvi, slot_idx, 1);
1870         }
1871 }
1872
1873 void mvs_release_task(struct mvs_info *mvi,
1874                       struct domain_device *dev)
1875 {
1876         int i, phyno[WIDE_PORT_MAX_PHY], num;
1877         num = mvs_find_dev_phyno(dev, phyno);
1878         for (i = 0; i < num; i++)
1879                 mvs_do_release_task(mvi, phyno[i], dev);
1880 }
1881
1882 static void mvs_phy_disconnected(struct mvs_phy *phy)
1883 {
1884         phy->phy_attached = 0;
1885         phy->att_dev_info = 0;
1886         phy->att_dev_sas_addr = 0;
1887 }
1888
1889 static void mvs_work_queue(struct work_struct *work)
1890 {
1891         struct delayed_work *dw = container_of(work, struct delayed_work, work);
1892         struct mvs_wq *mwq = container_of(dw, struct mvs_wq, work_q);
1893         struct mvs_info *mvi = mwq->mvi;
1894         unsigned long flags;
1895         u32 phy_no = (unsigned long) mwq->data;
1896         struct sas_ha_struct *sas_ha = mvi->sas;
1897         struct mvs_phy *phy = &mvi->phy[phy_no];
1898         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1899
1900         spin_lock_irqsave(&mvi->lock, flags);
1901         if (mwq->handler & PHY_PLUG_EVENT) {
1902
1903                 if (phy->phy_event & PHY_PLUG_OUT) {
1904                         u32 tmp;
1905                         struct sas_identify_frame *id;
1906                         id = (struct sas_identify_frame *)phy->frame_rcvd;
1907                         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no);
1908                         phy->phy_event &= ~PHY_PLUG_OUT;
1909                         if (!(tmp & PHY_READY_MASK)) {
1910                                 sas_phy_disconnected(sas_phy);
1911                                 mvs_phy_disconnected(phy);
1912                                 sas_ha->notify_phy_event(sas_phy,
1913                                         PHYE_LOSS_OF_SIGNAL);
1914                                 mv_dprintk("phy%d Removed Device\n", phy_no);
1915                         } else {
1916                                 MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1917                                 mvs_update_phyinfo(mvi, phy_no, 1);
1918                                 mvs_bytes_dmaed(mvi, phy_no);
1919                                 mvs_port_notify_formed(sas_phy, 0);
1920                                 mv_dprintk("phy%d Attached Device\n", phy_no);
1921                         }
1922                 }
1923         } else if (mwq->handler & EXP_BRCT_CHG) {
1924                 phy->phy_event &= ~EXP_BRCT_CHG;
1925                 sas_ha->notify_port_event(sas_phy,
1926                                 PORTE_BROADCAST_RCVD);
1927                 mv_dprintk("phy%d Got Broadcast Change\n", phy_no);
1928         }
1929         list_del(&mwq->entry);
1930         spin_unlock_irqrestore(&mvi->lock, flags);
1931         kfree(mwq);
1932 }
1933
1934 static int mvs_handle_event(struct mvs_info *mvi, void *data, int handler)
1935 {
1936         struct mvs_wq *mwq;
1937         int ret = 0;
1938
1939         mwq = kmalloc(sizeof(struct mvs_wq), GFP_ATOMIC);
1940         if (mwq) {
1941                 mwq->mvi = mvi;
1942                 mwq->data = data;
1943                 mwq->handler = handler;
1944                 MV_INIT_DELAYED_WORK(&mwq->work_q, mvs_work_queue, mwq);
1945                 list_add_tail(&mwq->entry, &mvi->wq_list);
1946                 schedule_delayed_work(&mwq->work_q, HZ * 2);
1947         } else
1948                 ret = -ENOMEM;
1949
1950         return ret;
1951 }
1952
1953 static void mvs_sig_time_out(unsigned long tphy)
1954 {
1955         struct mvs_phy *phy = (struct mvs_phy *)tphy;
1956         struct mvs_info *mvi = phy->mvi;
1957         u8 phy_no;
1958
1959         for (phy_no = 0; phy_no < mvi->chip->n_phy; phy_no++) {
1960                 if (&mvi->phy[phy_no] == phy) {
1961                         mv_dprintk("Get signature time out, reset phy %d\n",
1962                                 phy_no+mvi->id*mvi->chip->n_phy);
1963                         MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_HARD_RESET);
1964                 }
1965         }
1966 }
1967
1968 void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
1969 {
1970         u32 tmp;
1971         struct mvs_phy *phy = &mvi->phy[phy_no];
1972
1973         phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, phy_no);
1974         MVS_CHIP_DISP->write_port_irq_stat(mvi, phy_no, phy->irq_status);
1975         mv_dprintk("phy %d ctrl sts=0x%08X.\n", phy_no+mvi->id*mvi->chip->n_phy,
1976                 MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no));
1977         mv_dprintk("phy %d irq sts = 0x%08X\n", phy_no+mvi->id*mvi->chip->n_phy,
1978                 phy->irq_status);
1979
1980         /*
1981         * events is port event now ,
1982         * we need check the interrupt status which belongs to per port.
1983         */
1984
1985         if (phy->irq_status & PHYEV_DCDR_ERR) {
1986                 mv_dprintk("phy %d STP decoding error.\n",
1987                 phy_no + mvi->id*mvi->chip->n_phy);
1988         }
1989
1990         if (phy->irq_status & PHYEV_POOF) {
1991                 mdelay(500);
1992                 if (!(phy->phy_event & PHY_PLUG_OUT)) {
1993                         int dev_sata = phy->phy_type & PORT_TYPE_SATA;
1994                         int ready;
1995                         mvs_do_release_task(mvi, phy_no, NULL);
1996                         phy->phy_event |= PHY_PLUG_OUT;
1997                         MVS_CHIP_DISP->clear_srs_irq(mvi, 0, 1);
1998                         mvs_handle_event(mvi,
1999                                 (void *)(unsigned long)phy_no,
2000                                 PHY_PLUG_EVENT);
2001                         ready = mvs_is_phy_ready(mvi, phy_no);
2002                         if (ready || dev_sata) {
2003                                 if (MVS_CHIP_DISP->stp_reset)
2004                                         MVS_CHIP_DISP->stp_reset(mvi,
2005                                                         phy_no);
2006                                 else
2007                                         MVS_CHIP_DISP->phy_reset(mvi,
2008                                                         phy_no, MVS_SOFT_RESET);
2009                                 return;
2010                         }
2011                 }
2012         }
2013
2014         if (phy->irq_status & PHYEV_COMWAKE) {
2015                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, phy_no);
2016                 MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
2017                                         tmp | PHYEV_SIG_FIS);
2018                 if (phy->timer.function == NULL) {
2019                         phy->timer.data = (unsigned long)phy;
2020                         phy->timer.function = mvs_sig_time_out;
2021                         phy->timer.expires = jiffies + 5*HZ;
2022                         add_timer(&phy->timer);
2023                 }
2024         }
2025         if (phy->irq_status & (PHYEV_SIG_FIS | PHYEV_ID_DONE)) {
2026                 phy->phy_status = mvs_is_phy_ready(mvi, phy_no);
2027                 mv_dprintk("notify plug in on phy[%d]\n", phy_no);
2028                 if (phy->phy_status) {
2029                         mdelay(10);
2030                         MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
2031                         if (phy->phy_type & PORT_TYPE_SATA) {
2032                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(
2033                                                 mvi, phy_no);
2034                                 tmp &= ~PHYEV_SIG_FIS;
2035                                 MVS_CHIP_DISP->write_port_irq_mask(mvi,
2036                                                         phy_no, tmp);
2037                         }
2038                         mvs_update_phyinfo(mvi, phy_no, 0);
2039                         if (phy->phy_type & PORT_TYPE_SAS) {
2040                                 MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_PHY_TUNE);
2041                                 mdelay(10);
2042                         }
2043
2044                         mvs_bytes_dmaed(mvi, phy_no);
2045                         /* whether driver is going to handle hot plug */
2046                         if (phy->phy_event & PHY_PLUG_OUT) {
2047                                 mvs_port_notify_formed(&phy->sas_phy, 0);
2048                                 phy->phy_event &= ~PHY_PLUG_OUT;
2049                         }
2050                 } else {
2051                         mv_dprintk("plugin interrupt but phy%d is gone\n",
2052                                 phy_no + mvi->id*mvi->chip->n_phy);
2053                 }
2054         } else if (phy->irq_status & PHYEV_BROAD_CH) {
2055                 mv_dprintk("phy %d broadcast change.\n",
2056                         phy_no + mvi->id*mvi->chip->n_phy);
2057                 mvs_handle_event(mvi, (void *)(unsigned long)phy_no,
2058                                 EXP_BRCT_CHG);
2059         }
2060 }
2061
2062 int mvs_int_rx(struct mvs_info *mvi, bool self_clear)
2063 {
2064         u32 rx_prod_idx, rx_desc;
2065         bool attn = false;
2066
2067         /* the first dword in the RX ring is special: it contains
2068          * a mirror of the hardware's RX producer index, so that
2069          * we don't have to stall the CPU reading that register.
2070          * The actual RX ring is offset by one dword, due to this.
2071          */
2072         rx_prod_idx = mvi->rx_cons;
2073         mvi->rx_cons = le32_to_cpu(mvi->rx[0]);
2074         if (mvi->rx_cons == 0xfff)      /* h/w hasn't touched RX ring yet */
2075                 return 0;
2076
2077         /* The CMPL_Q may come late, read from register and try again
2078         * note: if coalescing is enabled,
2079         * it will need to read from register every time for sure
2080         */
2081         if (unlikely(mvi->rx_cons == rx_prod_idx))
2082                 mvi->rx_cons = MVS_CHIP_DISP->rx_update(mvi) & RX_RING_SZ_MASK;
2083
2084         if (mvi->rx_cons == rx_prod_idx)
2085                 return 0;
2086
2087         while (mvi->rx_cons != rx_prod_idx) {
2088                 /* increment our internal RX consumer pointer */
2089                 rx_prod_idx = (rx_prod_idx + 1) & (MVS_RX_RING_SZ - 1);
2090                 rx_desc = le32_to_cpu(mvi->rx[rx_prod_idx + 1]);
2091
2092                 if (likely(rx_desc & RXQ_DONE))
2093                         mvs_slot_complete(mvi, rx_desc, 0);
2094                 if (rx_desc & RXQ_ATTN) {
2095                         attn = true;
2096                 } else if (rx_desc & RXQ_ERR) {
2097                         if (!(rx_desc & RXQ_DONE))
2098                                 mvs_slot_complete(mvi, rx_desc, 0);
2099                 } else if (rx_desc & RXQ_SLOT_RESET) {
2100                         mvs_slot_free(mvi, rx_desc);
2101                 }
2102         }
2103
2104         if (attn && self_clear)
2105                 MVS_CHIP_DISP->int_full(mvi);
2106         return 0;
2107 }
2108