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_task *task = tei->task;
 445         struct domain_device *dev = task->dev;
 446         struct mvs_device *mvi_dev = dev->lldd_dev;
 447         struct mvs_cmd_hdr *hdr = tei->hdr;
 448         struct asd_sas_port *sas_port = dev->port;
 449         struct mvs_slot_info *slot;
 450         void *buf_prd;
 451         u32 tag = tei->tag, hdr_tag;
 452         u32 flags, del_q;
 453         void *buf_tmp;
 454         u8 *buf_cmd, *buf_oaf;
 455         dma_addr_t buf_tmp_dma;
 456         u32 i, req_len, resp_len;
 457         const u32 max_resp_len = SB_RFB_MAX;
 458
 459         if (mvs_assign_reg_set(mvi, mvi_dev) == MVS_ID_NOT_MAPPED) {
 460                 mv_dprintk("Have not enough regiset for dev %d.\n",
 461                         mvi_dev->device_id);
 462                 return -EBUSY;
 463         }
 464         slot = &mvi->slot_info[tag];
 465         slot->tx = mvi->tx_prod;
 466         del_q = TXQ_MODE_I | tag |
 467                 (TXQ_CMD_STP << TXQ_CMD_SHIFT) |
 468                 ((sas_port->phy_mask & TXQ_PHY_MASK) << TXQ_PHY_SHIFT) |
 469                 (mvi_dev->taskfileset << TXQ_SRS_SHIFT);
 470         mvi->tx[mvi->tx_prod] = cpu_to_le32(del_q);
 471
 472         if (task->data_dir == DMA_FROM_DEVICE)
 473                 flags = (MVS_CHIP_DISP->prd_count() << MCH_PRD_LEN_SHIFT);
 474         else
 475                 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 476
 477         if (task->ata_task.use_ncq)
 478                 flags |= MCH_FPDMA;
 479         if (dev->sata_dev.class == ATA_DEV_ATAPI) {
 480                 if (task->ata_task.fis.command != ATA_CMD_ID_ATAPI)
 481                         flags |= MCH_ATAPI;
 482         }
 483
 484         hdr->flags = cpu_to_le32(flags);
 485
 486         if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr_tag))
 487                 task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3);
 488         else
 489                 hdr_tag = tag;
 490
 491         hdr->tags = cpu_to_le32(hdr_tag);
 492
 493         hdr->data_len = cpu_to_le32(task->total_xfer_len);
 494
 495         /*
 496          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 497          */
 498
 499         /* region 1: command table area (MVS_ATA_CMD_SZ bytes) ************** */
 500         buf_cmd = buf_tmp = slot->buf;
 501         buf_tmp_dma = slot->buf_dma;
 502
 503         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 504
 505         buf_tmp += MVS_ATA_CMD_SZ;
 506         buf_tmp_dma += MVS_ATA_CMD_SZ;
 507
 508         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 509         /* used for STP.  unused for SATA? */
 510         buf_oaf = buf_tmp;
 511         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 512
 513         buf_tmp += MVS_OAF_SZ;
 514         buf_tmp_dma += MVS_OAF_SZ;
 515
 516         /* region 3: PRD table ********************************************* */
 517         buf_prd = buf_tmp;
 518
 519         if (tei->n_elem)
 520                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 521         else
 522                 hdr->prd_tbl = 0;
 523         i = MVS_CHIP_DISP->prd_size() * MVS_CHIP_DISP->prd_count();
 524
 525         buf_tmp += i;
 526         buf_tmp_dma += i;
 527
 528         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 529         slot->response = buf_tmp;
 530         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 531         if (mvi->flags & MVF_FLAG_SOC)
 532                 hdr->reserved[0] = 0;
 533
 534         req_len = sizeof(struct host_to_dev_fis);
 535         resp_len = MVS_SLOT_BUF_SZ - MVS_ATA_CMD_SZ -
 536             sizeof(struct mvs_err_info) - i;
 537
 538         /* request, response lengths */
 539         resp_len = min(resp_len, max_resp_len);
 540         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 541
 542         if (likely(!task->ata_task.device_control_reg_update))
 543                 task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
 544         /* fill in command FIS and ATAPI CDB */
 545         memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
 546         if (dev->sata_dev.class == ATA_DEV_ATAPI)
 547                 memcpy(buf_cmd + STP_ATAPI_CMD,
 548                         task->ata_task.atapi_packet, 16);
 549
 550         /* generate open address frame hdr (first 12 bytes) */
 551         /* initiator, STP, ftype 1h */
 552         buf_oaf[0] = (1 << 7) | (PROTOCOL_STP << 4) | 0x1;
 553         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 554         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 555         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 556
 557         /* fill in PRD (scatter/gather) table, if any */
 558         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 559
 560         if (task->data_dir == DMA_FROM_DEVICE)
 561                 MVS_CHIP_DISP->dma_fix(mvi, sas_port->phy_mask,
 562                                 TRASH_BUCKET_SIZE, tei->n_elem, buf_prd);
 563
 564         return 0;
 565 }
 566
 567 static int mvs_task_prep_ssp(struct mvs_info *mvi,
 568                              struct mvs_task_exec_info *tei, int is_tmf,
 569                              struct mvs_tmf_task *tmf)
 570 {
 571         struct sas_task *task = tei->task;
 572         struct mvs_cmd_hdr *hdr = tei->hdr;
 573         struct mvs_port *port = tei->port;
 574         struct domain_device *dev = task->dev;
 575         struct mvs_device *mvi_dev = dev->lldd_dev;
 576         struct asd_sas_port *sas_port = dev->port;
 577         struct mvs_slot_info *slot;
 578         void *buf_prd;
 579         struct ssp_frame_hdr *ssp_hdr;
 580         void *buf_tmp;
 581         u8 *buf_cmd, *buf_oaf, fburst = 0;
 582         dma_addr_t buf_tmp_dma;
 583         u32 flags;
 584         u32 resp_len, req_len, i, tag = tei->tag;
 585         const u32 max_resp_len = SB_RFB_MAX;
 586         u32 phy_mask;
 587
 588         slot = &mvi->slot_info[tag];
 589
 590         phy_mask = ((port->wide_port_phymap) ? port->wide_port_phymap :
 591                 sas_port->phy_mask) & TXQ_PHY_MASK;
 592
 593         slot->tx = mvi->tx_prod;
 594         mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag |
 595                                 (TXQ_CMD_SSP << TXQ_CMD_SHIFT) |
 596                                 (phy_mask << TXQ_PHY_SHIFT));
 597
 598         flags = MCH_RETRY;
 599         if (task->ssp_task.enable_first_burst) {
 600                 flags |= MCH_FBURST;
 601                 fburst = (1 << 7);
 602         }
 603         if (is_tmf)
 604                 flags |= (MCH_SSP_FR_TASK << MCH_SSP_FR_TYPE_SHIFT);
 605         else
 606                 flags |= (MCH_SSP_FR_CMD << MCH_SSP_FR_TYPE_SHIFT);
 607
 608         hdr->flags = cpu_to_le32(flags | (tei->n_elem << MCH_PRD_LEN_SHIFT));
 609         hdr->tags = cpu_to_le32(tag);
 610         hdr->data_len = cpu_to_le32(task->total_xfer_len);
 611
 612         /*
 613          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 614          */
 615
 616         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ************** */
 617         buf_cmd = buf_tmp = slot->buf;
 618         buf_tmp_dma = slot->buf_dma;
 619
 620         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 621
 622         buf_tmp += MVS_SSP_CMD_SZ;
 623         buf_tmp_dma += MVS_SSP_CMD_SZ;
 624
 625         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 626         buf_oaf = buf_tmp;
 627         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 628
 629         buf_tmp += MVS_OAF_SZ;
 630         buf_tmp_dma += MVS_OAF_SZ;
 631
 632         /* region 3: PRD table ********************************************* */
 633         buf_prd = buf_tmp;
 634         if (tei->n_elem)
 635                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 636         else
 637                 hdr->prd_tbl = 0;
 638
 639         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 640         buf_tmp += i;
 641         buf_tmp_dma += i;
 642
 643         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 644         slot->response = buf_tmp;
 645         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 646         if (mvi->flags & MVF_FLAG_SOC)
 647                 hdr->reserved[0] = 0;
 648
 649         resp_len = MVS_SLOT_BUF_SZ - MVS_SSP_CMD_SZ - MVS_OAF_SZ -
 650             sizeof(struct mvs_err_info) - i;
 651         resp_len = min(resp_len, max_resp_len);
 652
 653         req_len = sizeof(struct ssp_frame_hdr) + 28;
 654
 655         /* request, response lengths */
 656         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 657
 658         /* generate open address frame hdr (first 12 bytes) */
 659         /* initiator, SSP, ftype 1h */
 660         buf_oaf[0] = (1 << 7) | (PROTOCOL_SSP << 4) | 0x1;
 661         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
 662         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 663         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 664
 665         /* fill in SSP frame header (Command Table.SSP frame header) */
 666         ssp_hdr = (struct ssp_frame_hdr *)buf_cmd;
 667
 668         if (is_tmf)
 669                 ssp_hdr->frame_type = SSP_TASK;
 670         else
 671                 ssp_hdr->frame_type = SSP_COMMAND;
 672
 673         memcpy(ssp_hdr->hashed_dest_addr, dev->hashed_sas_addr,
 674                HASHED_SAS_ADDR_SIZE);
 675         memcpy(ssp_hdr->hashed_src_addr,
 676                dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
 677         ssp_hdr->tag = cpu_to_be16(tag);
 678
 679         /* fill in IU for TASK and Command Frame */
 680         buf_cmd += sizeof(*ssp_hdr);
 681         memcpy(buf_cmd, &task->ssp_task.LUN, 8);
 682
 683         if (ssp_hdr->frame_type != SSP_TASK) {
 684                 buf_cmd[9] = fburst | task->ssp_task.task_attr |
 685                                 (task->ssp_task.task_prio << 3);
 686                 memcpy(buf_cmd + 12, task->ssp_task.cmd->cmnd,
 687                        task->ssp_task.cmd->cmd_len);
 688         } else{
 689                 buf_cmd[10] = tmf->tmf;
 690                 switch (tmf->tmf) {
 691                 case TMF_ABORT_TASK:
 692                 case TMF_QUERY_TASK:
 693                         buf_cmd[12] =
 694                                 (tmf->tag_of_task_to_be_managed >> 8) & 0xff;
 695                         buf_cmd[13] =
 696                                 tmf->tag_of_task_to_be_managed & 0xff;
 697                         break;
 698                 default:
 699                         break;
 700                 }
 701         }
 702         /* fill in PRD (scatter/gather) table, if any */
 703         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 704         return 0;
 705 }
 706
 707 #define DEV_IS_GONE(mvi_dev)    ((!mvi_dev || (mvi_dev->dev_type == SAS_PHY_UNUSED)))
 708 static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf,
 709                                 struct mvs_tmf_task *tmf, int *pass)
 710 {
 711         struct domain_device *dev = task->dev;
 712         struct mvs_device *mvi_dev = dev->lldd_dev;
 713         struct mvs_task_exec_info tei;
 714         struct mvs_slot_info *slot;
 715         u32 tag = 0xdeadbeef, n_elem = 0;
 716         int rc = 0;
 717
 718         if (!dev->port) {
 719                 struct task_status_struct *tsm = &task->task_status;
 720
 721                 tsm->resp = SAS_TASK_UNDELIVERED;
 722                 tsm->stat = SAS_PHY_DOWN;
 723                 /*
 724                  * libsas will use dev->port, should
 725                  * not call task_done for sata
 726                  */
 727                 if (dev->dev_type != SAS_SATA_DEV)
 728                         task->task_done(task);
 729                 return rc;
 730         }
 731
 732         if (DEV_IS_GONE(mvi_dev)) {
 733                 if (mvi_dev)
 734                         mv_dprintk("device %d not ready.\n",
 735                                 mvi_dev->device_id);
 736                 else
 737                         mv_dprintk("device %016llx not ready.\n",
 738                                 SAS_ADDR(dev->sas_addr));
 739
 740                         rc = SAS_PHY_DOWN;
 741                         return rc;
 742         }
 743         tei.port = dev->port->lldd_port;
 744         if (tei.port && !tei.port->port_attached && !tmf) {
 745                 if (sas_protocol_ata(task->task_proto)) {
 746                         struct task_status_struct *ts = &task->task_status;
 747                         mv_dprintk("SATA/STP port %d does not attach"
 748                                         "device.\n", dev->port->id);
 749                         ts->resp = SAS_TASK_COMPLETE;
 750                         ts->stat = SAS_PHY_DOWN;
 751
 752                         task->task_done(task);
 753
 754                 } else {
 755                         struct task_status_struct *ts = &task->task_status;
 756                         mv_dprintk("SAS port %d does not attach"
 757                                 "device.\n", dev->port->id);
 758                         ts->resp = SAS_TASK_UNDELIVERED;
 759                         ts->stat = SAS_PHY_DOWN;
 760                         task->task_done(task);
 761                 }
 762                 return rc;
 763         }
 764
 765         if (!sas_protocol_ata(task->task_proto)) {
 766                 if (task->num_scatter) {
 767                         n_elem = dma_map_sg(mvi->dev,
 768                                             task->scatter,
 769                                             task->num_scatter,
 770                                             task->data_dir);
 771                         if (!n_elem) {
 772                                 rc = -ENOMEM;
 773                                 goto prep_out;
 774                         }
 775                 }
 776         } else {
 777                 n_elem = task->num_scatter;
 778         }
 779
 780         rc = mvs_tag_alloc(mvi, &tag);
 781         if (rc)
 782                 goto err_out;
 783
 784         slot = &mvi->slot_info[tag];
 785
 786         task->lldd_task = NULL;
 787         slot->n_elem = n_elem;
 788         slot->slot_tag = tag;
 789
 790         slot->buf = pci_pool_alloc(mvi->dma_pool, GFP_ATOMIC, &slot->buf_dma);
 791         if (!slot->buf)
 792                 goto err_out_tag;
 793         memset(slot->buf, 0, MVS_SLOT_BUF_SZ);
 794
 795         tei.task = task;
 796         tei.hdr = &mvi->slot[tag];
 797         tei.tag = tag;
 798         tei.n_elem = n_elem;
 799         switch (task->task_proto) {
 800         case SAS_PROTOCOL_SMP:
 801                 rc = mvs_task_prep_smp(mvi, &tei);
 802                 break;
 803         case SAS_PROTOCOL_SSP:
 804                 rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf);
 805                 break;
 806         case SAS_PROTOCOL_SATA:
 807         case SAS_PROTOCOL_STP:
 808         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 809                 rc = mvs_task_prep_ata(mvi, &tei);
 810                 break;
 811         default:
 812                 dev_printk(KERN_ERR, mvi->dev,
 813                         "unknown sas_task proto: 0x%x\n",
 814                         task->task_proto);
 815                 rc = -EINVAL;
 816                 break;
 817         }
 818
 819         if (rc) {
 820                 mv_dprintk("rc is %x\n", rc);
 821                 goto err_out_slot_buf;
 822         }
 823         slot->task = task;
 824         slot->port = tei.port;
 825         task->lldd_task = slot;
 826         list_add_tail(&slot->entry, &tei.port->list);
 827         spin_lock(&task->task_state_lock);
 828         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 829         spin_unlock(&task->task_state_lock);
 830
 831         mvi_dev->running_req++;
 832         ++(*pass);
 833         mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
 834
 835         return rc;
 836
 837 err_out_slot_buf:
 838         pci_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
 839 err_out_tag:
 840         mvs_tag_free(mvi, tag);
 841 err_out:
 842
 843         dev_printk(KERN_ERR, mvi->dev, "mvsas prep failed[%d]!\n", rc);
 844         if (!sas_protocol_ata(task->task_proto))
 845                 if (n_elem)
 846                         dma_unmap_sg(mvi->dev, task->scatter, n_elem,
 847                                      task->data_dir);
 848 prep_out:
 849         return rc;
 850 }
 851
 852 static int mvs_task_exec(struct sas_task *task, gfp_t gfp_flags,
 853                                 struct completion *completion, int is_tmf,
 854                                 struct mvs_tmf_task *tmf)
 855 {
 856         struct mvs_info *mvi = NULL;
 857         u32 rc = 0;
 858         u32 pass = 0;
 859         unsigned long flags = 0;
 860
 861         mvi = ((struct mvs_device *)task->dev->lldd_dev)->mvi_info;
 862
 863         spin_lock_irqsave(&mvi->lock, flags);
 864         rc = mvs_task_prep(task, mvi, is_tmf, tmf, &pass);
 865         if (rc)
 866                 dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
 867
 868         if (likely(pass))
 869                         MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) &
 870                                 (MVS_CHIP_SLOT_SZ - 1));
 871         spin_unlock_irqrestore(&mvi->lock, flags);
 872
 873         return rc;
 874 }
 875
 876 int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags)
 877 {
 878         return mvs_task_exec(task, gfp_flags, NULL, 0, NULL);
 879 }
 880
 881 static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc)
 882 {
 883         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
 884         mvs_tag_clear(mvi, slot_idx);
 885 }
 886
 887 static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task,
 888                           struct mvs_slot_info *slot, u32 slot_idx)
 889 {
 890         if (!slot->task)
 891                 return;
 892         if (!sas_protocol_ata(task->task_proto))
 893                 if (slot->n_elem)
 894                         dma_unmap_sg(mvi->dev, task->scatter,
 895                                      slot->n_elem, task->data_dir);
 896
 897         switch (task->task_proto) {
 898         case SAS_PROTOCOL_SMP:
 899                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_resp, 1,
 900                              PCI_DMA_FROMDEVICE);
 901                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_req, 1,
 902                              PCI_DMA_TODEVICE);
 903                 break;
 904
 905         case SAS_PROTOCOL_SATA:
 906         case SAS_PROTOCOL_STP:
 907         case SAS_PROTOCOL_SSP:
 908         default:
 909                 /* do nothing */
 910                 break;
 911         }
 912
 913         if (slot->buf) {
 914                 pci_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
 915                 slot->buf = NULL;
 916         }
 917         list_del_init(&slot->entry);
 918         task->lldd_task = NULL;
 919         slot->task = NULL;
 920         slot->port = NULL;
 921         slot->slot_tag = 0xFFFFFFFF;
 922         mvs_slot_free(mvi, slot_idx);
 923 }
 924
 925 static void mvs_update_wideport(struct mvs_info *mvi, int phy_no)
 926 {
 927         struct mvs_phy *phy = &mvi->phy[phy_no];
 928         struct mvs_port *port = phy->port;
 929         int j, no;
 930
 931         for_each_phy(port->wide_port_phymap, j, no) {
 932                 if (j & 1) {
 933                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
 934                                                 PHYR_WIDE_PORT);
 935                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
 936                                                 port->wide_port_phymap);
 937                 } else {
 938                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
 939                                                 PHYR_WIDE_PORT);
 940                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
 941                                                 0);
 942                 }
 943         }
 944 }
 945
 946 static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i)
 947 {
 948         u32 tmp;
 949         struct mvs_phy *phy = &mvi->phy[i];
 950         struct mvs_port *port = phy->port;
 951
 952         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, i);
 953         if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) {
 954                 if (!port)
 955                         phy->phy_attached = 1;
 956                 return tmp;
 957         }
 958
 959         if (port) {
 960                 if (phy->phy_type & PORT_TYPE_SAS) {
 961                         port->wide_port_phymap &= ~(1U << i);
 962                         if (!port->wide_port_phymap)
 963                                 port->port_attached = 0;
 964                         mvs_update_wideport(mvi, i);
 965                 } else if (phy->phy_type & PORT_TYPE_SATA)
 966                         port->port_attached = 0;
 967                 phy->port = NULL;
 968                 phy->phy_attached = 0;
 969                 phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);
 970         }
 971         return 0;
 972 }
 973
 974 static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf)
 975 {
 976         u32 *s = (u32 *) buf;
 977
 978         if (!s)
 979                 return NULL;
 980
 981         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG3);
 982         s[3] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 983
 984         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG2);
 985         s[2] = 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_SIG1);
 988         s[1] = 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_SIG0);
 991         s[0] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
 992
 993         if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01))
 994                 s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10);
 995
 996         return s;
 997 }
 998
 999 static u32 mvs_is_sig_fis_received(u32 irq_status)
1000 {
1001         return irq_status & PHYEV_SIG_FIS;
1002 }
1003
1004 static void mvs_sig_remove_timer(struct mvs_phy *phy)
1005 {
1006         if (phy->timer.function)
1007                 del_timer(&phy->timer);
1008         phy->timer.function = NULL;
1009 }
1010
1011 void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st)
1012 {
1013         struct mvs_phy *phy = &mvi->phy[i];
1014         struct sas_identify_frame *id;
1015
1016         id = (struct sas_identify_frame *)phy->frame_rcvd;
1017
1018         if (get_st) {
1019                 phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, i);
1020                 phy->phy_status = mvs_is_phy_ready(mvi, i);
1021         }
1022
1023         if (phy->phy_status) {
1024                 int oob_done = 0;
1025                 struct asd_sas_phy *sas_phy = &mvi->phy[i].sas_phy;
1026
1027                 oob_done = MVS_CHIP_DISP->oob_done(mvi, i);
1028
1029                 MVS_CHIP_DISP->fix_phy_info(mvi, i, id);
1030                 if (phy->phy_type & PORT_TYPE_SATA) {
1031                         phy->identify.target_port_protocols = SAS_PROTOCOL_STP;
1032                         if (mvs_is_sig_fis_received(phy->irq_status)) {
1033                                 mvs_sig_remove_timer(phy);
1034                                 phy->phy_attached = 1;
1035                                 phy->att_dev_sas_addr =
1036                                         i + mvi->id * mvi->chip->n_phy;
1037                                 if (oob_done)
1038                                         sas_phy->oob_mode = SATA_OOB_MODE;
1039                                 phy->frame_rcvd_size =
1040                                     sizeof(struct dev_to_host_fis);
1041                                 mvs_get_d2h_reg(mvi, i, id);
1042                         } else {
1043                                 u32 tmp;
1044                                 dev_printk(KERN_DEBUG, mvi->dev,
1045                                         "Phy%d : No sig fis\n", i);
1046                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, i);
1047                                 MVS_CHIP_DISP->write_port_irq_mask(mvi, i,
1048                                                 tmp | PHYEV_SIG_FIS);
1049                                 phy->phy_attached = 0;
1050                                 phy->phy_type &= ~PORT_TYPE_SATA;
1051                                 goto out_done;
1052                         }
1053                 }       else if (phy->phy_type & PORT_TYPE_SAS
1054                         || phy->att_dev_info & PORT_SSP_INIT_MASK) {
1055                         phy->phy_attached = 1;
1056                         phy->identify.device_type =
1057                                 phy->att_dev_info & PORT_DEV_TYPE_MASK;
1058
1059                         if (phy->identify.device_type == SAS_END_DEVICE)
1060                                 phy->identify.target_port_protocols =
1061                                                         SAS_PROTOCOL_SSP;
1062                         else if (phy->identify.device_type != SAS_PHY_UNUSED)
1063                                 phy->identify.target_port_protocols =
1064                                                         SAS_PROTOCOL_SMP;
1065                         if (oob_done)
1066                                 sas_phy->oob_mode = SAS_OOB_MODE;
1067                         phy->frame_rcvd_size =
1068                             sizeof(struct sas_identify_frame);
1069                 }
1070                 memcpy(sas_phy->attached_sas_addr,
1071                         &phy->att_dev_sas_addr, SAS_ADDR_SIZE);
1072
1073                 if (MVS_CHIP_DISP->phy_work_around)
1074                         MVS_CHIP_DISP->phy_work_around(mvi, i);
1075         }
1076         mv_dprintk("phy %d attach dev info is %x\n",
1077                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_info);
1078         mv_dprintk("phy %d attach sas addr is %llx\n",
1079                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_sas_addr);
1080 out_done:
1081         if (get_st)
1082                 MVS_CHIP_DISP->write_port_irq_stat(mvi, i, phy->irq_status);
1083 }
1084
1085 static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
1086 {
1087         struct sas_ha_struct *sas_ha = sas_phy->ha;
1088         struct mvs_info *mvi = NULL; int i = 0, hi;
1089         struct mvs_phy *phy = sas_phy->lldd_phy;
1090         struct asd_sas_port *sas_port = sas_phy->port;
1091         struct mvs_port *port;
1092         unsigned long flags = 0;
1093         if (!sas_port)
1094                 return;
1095
1096         while (sas_ha->sas_phy[i]) {
1097                 if (sas_ha->sas_phy[i] == sas_phy)
1098                         break;
1099                 i++;
1100         }
1101         hi = i/((struct mvs_prv_info *)sas_ha->lldd_ha)->n_phy;
1102         mvi = ((struct mvs_prv_info *)sas_ha->lldd_ha)->mvi[hi];
1103         if (i >= mvi->chip->n_phy)
1104                 port = &mvi->port[i - mvi->chip->n_phy];
1105         else
1106                 port = &mvi->port[i];
1107         if (lock)
1108                 spin_lock_irqsave(&mvi->lock, flags);
1109         port->port_attached = 1;
1110         phy->port = port;
1111         sas_port->lldd_port = port;
1112         if (phy->phy_type & PORT_TYPE_SAS) {
1113                 port->wide_port_phymap = sas_port->phy_mask;
1114                 mv_printk("set wide port phy map %x\n", sas_port->phy_mask);
1115                 mvs_update_wideport(mvi, sas_phy->id);
1116
1117                 /* direct attached SAS device */
1118                 if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
1119                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
1120                         MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x04);
1121                 }
1122         }
1123         if (lock)
1124                 spin_unlock_irqrestore(&mvi->lock, flags);
1125 }
1126
1127 static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock)
1128 {
1129         struct domain_device *dev;
1130         struct mvs_phy *phy = sas_phy->lldd_phy;
1131         struct mvs_info *mvi = phy->mvi;
1132         struct asd_sas_port *port = sas_phy->port;
1133         int phy_no = 0;
1134
1135         while (phy != &mvi->phy[phy_no]) {
1136                 phy_no++;
1137                 if (phy_no >= MVS_MAX_PHYS)
1138                         return;
1139         }
1140         list_for_each_entry(dev, &port->dev_list, dev_list_node)
1141                 mvs_do_release_task(phy->mvi, phy_no, dev);
1142
1143 }
1144
1145
1146 void mvs_port_formed(struct asd_sas_phy *sas_phy)
1147 {
1148         mvs_port_notify_formed(sas_phy, 1);
1149 }
1150
1151 void mvs_port_deformed(struct asd_sas_phy *sas_phy)
1152 {
1153         mvs_port_notify_deformed(sas_phy, 1);
1154 }
1155
1156 struct mvs_device *mvs_alloc_dev(struct mvs_info *mvi)
1157 {
1158         u32 dev;
1159         for (dev = 0; dev < MVS_MAX_DEVICES; dev++) {
1160                 if (mvi->devices[dev].dev_type == SAS_PHY_UNUSED) {
1161                         mvi->devices[dev].device_id = dev;
1162                         return &mvi->devices[dev];
1163                 }
1164         }
1165
1166         if (dev == MVS_MAX_DEVICES)
1167                 mv_printk("max support %d devices, ignore ..\n",
1168                         MVS_MAX_DEVICES);
1169
1170         return NULL;
1171 }
1172
1173 void mvs_free_dev(struct mvs_device *mvi_dev)
1174 {
1175         u32 id = mvi_dev->device_id;
1176         memset(mvi_dev, 0, sizeof(*mvi_dev));
1177         mvi_dev->device_id = id;
1178         mvi_dev->dev_type = SAS_PHY_UNUSED;
1179         mvi_dev->dev_status = MVS_DEV_NORMAL;
1180         mvi_dev->taskfileset = MVS_ID_NOT_MAPPED;
1181 }
1182
1183 int mvs_dev_found_notify(struct domain_device *dev, int lock)
1184 {
1185         unsigned long flags = 0;
1186         int res = 0;
1187         struct mvs_info *mvi = NULL;
1188         struct domain_device *parent_dev = dev->parent;
1189         struct mvs_device *mvi_device;
1190
1191         mvi = mvs_find_dev_mvi(dev);
1192
1193         if (lock)
1194                 spin_lock_irqsave(&mvi->lock, flags);
1195
1196         mvi_device = mvs_alloc_dev(mvi);
1197         if (!mvi_device) {
1198                 res = -1;
1199                 goto found_out;
1200         }
1201         dev->lldd_dev = mvi_device;
1202         mvi_device->dev_status = MVS_DEV_NORMAL;
1203         mvi_device->dev_type = dev->dev_type;
1204         mvi_device->mvi_info = mvi;
1205         mvi_device->sas_device = dev;
1206         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
1207                 int phy_id;
1208                 u8 phy_num = parent_dev->ex_dev.num_phys;
1209                 struct ex_phy *phy;
1210                 for (phy_id = 0; phy_id < phy_num; phy_id++) {
1211                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
1212                         if (SAS_ADDR(phy->attached_sas_addr) ==
1213                                 SAS_ADDR(dev->sas_addr)) {
1214                                 mvi_device->attached_phy = phy_id;
1215                                 break;
1216                         }
1217                 }
1218
1219                 if (phy_id == phy_num) {
1220                         mv_printk("Error: no attached dev:%016llx"
1221                                 "at ex:%016llx.\n",
1222                                 SAS_ADDR(dev->sas_addr),
1223                                 SAS_ADDR(parent_dev->sas_addr));
1224                         res = -1;
1225                 }
1226         }
1227
1228 found_out:
1229         if (lock)
1230                 spin_unlock_irqrestore(&mvi->lock, flags);
1231         return res;
1232 }
1233
1234 int mvs_dev_found(struct domain_device *dev)
1235 {
1236         return mvs_dev_found_notify(dev, 1);
1237 }
1238
1239 void mvs_dev_gone_notify(struct domain_device *dev)
1240 {
1241         unsigned long flags = 0;
1242         struct mvs_device *mvi_dev = dev->lldd_dev;
1243         struct mvs_info *mvi;
1244
1245         if (!mvi_dev) {
1246                 mv_dprintk("found dev has gone.\n");
1247                 return;
1248         }
1249
1250         mvi = mvi_dev->mvi_info;
1251
1252         spin_lock_irqsave(&mvi->lock, flags);
1253
1254         mv_dprintk("found dev[%d:%x] is gone.\n",
1255                 mvi_dev->device_id, mvi_dev->dev_type);
1256         mvs_release_task(mvi, dev);
1257         mvs_free_reg_set(mvi, mvi_dev);
1258         mvs_free_dev(mvi_dev);
1259
1260         dev->lldd_dev = NULL;
1261         mvi_dev->sas_device = NULL;
1262
1263         spin_unlock_irqrestore(&mvi->lock, flags);
1264 }
1265
1266
1267 void mvs_dev_gone(struct domain_device *dev)
1268 {
1269         mvs_dev_gone_notify(dev);
1270 }
1271
1272 static void mvs_task_done(struct sas_task *task)
1273 {
1274         if (!del_timer(&task->slow_task->timer))
1275                 return;
1276         complete(&task->slow_task->completion);
1277 }
1278
1279 static void mvs_tmf_timedout(unsigned long data)
1280 {
1281         struct sas_task *task = (struct sas_task *)data;
1282
1283         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1284         complete(&task->slow_task->completion);
1285 }
1286
1287 #define MVS_TASK_TIMEOUT 20
1288 static int mvs_exec_internal_tmf_task(struct domain_device *dev,
1289                         void *parameter, u32 para_len, struct mvs_tmf_task *tmf)
1290 {
1291         int res, retry;
1292         struct sas_task *task = NULL;
1293
1294         for (retry = 0; retry < 3; retry++) {
1295                 task = sas_alloc_slow_task(GFP_KERNEL);
1296                 if (!task)
1297                         return -ENOMEM;
1298
1299                 task->dev = dev;
1300                 task->task_proto = dev->tproto;
1301
1302                 memcpy(&task->ssp_task, parameter, para_len);
1303                 task->task_done = mvs_task_done;
1304
1305                 task->slow_task->timer.data = (unsigned long) task;
1306                 task->slow_task->timer.function = mvs_tmf_timedout;
1307                 task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ;
1308                 add_timer(&task->slow_task->timer);
1309
1310                 res = mvs_task_exec(task, GFP_KERNEL, NULL, 1, tmf);
1311
1312                 if (res) {
1313                         del_timer(&task->slow_task->timer);
1314                         mv_printk("executing internal task failed:%d\n", res);
1315                         goto ex_err;
1316                 }
1317
1318                 wait_for_completion(&task->slow_task->completion);
1319                 res = TMF_RESP_FUNC_FAILED;
1320                 /* Even TMF timed out, return direct. */
1321                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1322                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1323                                 mv_printk("TMF task[%x] timeout.\n", tmf->tmf);
1324                                 goto ex_err;
1325                         }
1326                 }
1327
1328                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1329                     task->task_status.stat == SAM_STAT_GOOD) {
1330                         res = TMF_RESP_FUNC_COMPLETE;
1331                         break;
1332                 }
1333
1334                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1335                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1336                         /* no error, but return the number of bytes of
1337                          * underrun */
1338                         res = task->task_status.residual;
1339                         break;
1340                 }
1341
1342                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1343                       task->task_status.stat == SAS_DATA_OVERRUN) {
1344                         mv_dprintk("blocked task error.\n");
1345                         res = -EMSGSIZE;
1346                         break;
1347                 } else {
1348                         mv_dprintk(" task to dev %016llx response: 0x%x "
1349                                     "status 0x%x\n",
1350                                     SAS_ADDR(dev->sas_addr),
1351                                     task->task_status.resp,
1352                                     task->task_status.stat);
1353                         sas_free_task(task);
1354                         task = NULL;
1355
1356                 }
1357         }
1358 ex_err:
1359         BUG_ON(retry == 3 && task != NULL);
1360         sas_free_task(task);
1361         return res;
1362 }
1363
1364 static int mvs_debug_issue_ssp_tmf(struct domain_device *dev,
1365                                 u8 *lun, struct mvs_tmf_task *tmf)
1366 {
1367         struct sas_ssp_task ssp_task;
1368         if (!(dev->tproto & SAS_PROTOCOL_SSP))
1369                 return TMF_RESP_FUNC_ESUPP;
1370
1371         memcpy(ssp_task.LUN, lun, 8);
1372
1373         return mvs_exec_internal_tmf_task(dev, &ssp_task,
1374                                 sizeof(ssp_task), tmf);
1375 }
1376
1377
1378 /*  Standard mandates link reset for ATA  (type 0)
1379     and hard reset for SSP (type 1) , only for RECOVERY */
1380 static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
1381 {
1382         int rc;
1383         struct sas_phy *phy = sas_get_local_phy(dev);
1384         int reset_type = (dev->dev_type == SAS_SATA_DEV ||
1385                         (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1386         rc = sas_phy_reset(phy, reset_type);
1387         sas_put_local_phy(phy);
1388         msleep(2000);
1389         return rc;
1390 }
1391
1392 /* mandatory SAM-3 */
1393 int mvs_lu_reset(struct domain_device *dev, u8 *lun)
1394 {
1395         unsigned long flags;
1396         int rc = TMF_RESP_FUNC_FAILED;
1397         struct mvs_tmf_task tmf_task;
1398         struct mvs_device * mvi_dev = dev->lldd_dev;
1399         struct mvs_info *mvi = mvi_dev->mvi_info;
1400
1401         tmf_task.tmf = TMF_LU_RESET;
1402         mvi_dev->dev_status = MVS_DEV_EH;
1403         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1404         if (rc == TMF_RESP_FUNC_COMPLETE) {
1405                 spin_lock_irqsave(&mvi->lock, flags);
1406                 mvs_release_task(mvi, dev);
1407                 spin_unlock_irqrestore(&mvi->lock, flags);
1408         }
1409         /* If failed, fall-through I_T_Nexus reset */
1410         mv_printk("%s for device[%x]:rc= %d\n", __func__,
1411                         mvi_dev->device_id, rc);
1412         return rc;
1413 }
1414
1415 int mvs_I_T_nexus_reset(struct domain_device *dev)
1416 {
1417         unsigned long flags;
1418         int rc = TMF_RESP_FUNC_FAILED;
1419     struct mvs_device * mvi_dev = (struct mvs_device *)dev->lldd_dev;
1420         struct mvs_info *mvi = mvi_dev->mvi_info;
1421
1422         if (mvi_dev->dev_status != MVS_DEV_EH)
1423                 return TMF_RESP_FUNC_COMPLETE;
1424         else
1425                 mvi_dev->dev_status = MVS_DEV_NORMAL;
1426         rc = mvs_debug_I_T_nexus_reset(dev);
1427         mv_printk("%s for device[%x]:rc= %d\n",
1428                 __func__, mvi_dev->device_id, rc);
1429
1430         spin_lock_irqsave(&mvi->lock, flags);
1431         mvs_release_task(mvi, dev);
1432         spin_unlock_irqrestore(&mvi->lock, flags);
1433
1434         return rc;
1435 }
1436 /* optional SAM-3 */
1437 int mvs_query_task(struct sas_task *task)
1438 {
1439         u32 tag;
1440         struct scsi_lun lun;
1441         struct mvs_tmf_task tmf_task;
1442         int rc = TMF_RESP_FUNC_FAILED;
1443
1444         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1445                 struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1446                 struct domain_device *dev = task->dev;
1447                 struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1448                 struct mvs_info *mvi = mvi_dev->mvi_info;
1449
1450                 int_to_scsilun(cmnd->device->lun, &lun);
1451                 rc = mvs_find_tag(mvi, task, &tag);
1452                 if (rc == 0) {
1453                         rc = TMF_RESP_FUNC_FAILED;
1454                         return rc;
1455                 }
1456
1457                 tmf_task.tmf = TMF_QUERY_TASK;
1458                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1459
1460                 rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1461                 switch (rc) {
1462                 /* The task is still in Lun, release it then */
1463                 case TMF_RESP_FUNC_SUCC:
1464                 /* The task is not in Lun or failed, reset the phy */
1465                 case TMF_RESP_FUNC_FAILED:
1466                 case TMF_RESP_FUNC_COMPLETE:
1467                         break;
1468                 }
1469         }
1470         mv_printk("%s:rc= %d\n", __func__, rc);
1471         return rc;
1472 }
1473
1474 /*  mandatory SAM-3, still need free task/slot info */
1475 int mvs_abort_task(struct sas_task *task)
1476 {
1477         struct scsi_lun lun;
1478         struct mvs_tmf_task tmf_task;
1479         struct domain_device *dev = task->dev;
1480         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1481         struct mvs_info *mvi;
1482         int rc = TMF_RESP_FUNC_FAILED;
1483         unsigned long flags;
1484         u32 tag;
1485
1486         if (!mvi_dev) {
1487                 mv_printk("Device has removed\n");
1488                 return TMF_RESP_FUNC_FAILED;
1489         }
1490
1491         mvi = mvi_dev->mvi_info;
1492
1493         spin_lock_irqsave(&task->task_state_lock, flags);
1494         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1495                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1496                 rc = TMF_RESP_FUNC_COMPLETE;
1497                 goto out;
1498         }
1499         spin_unlock_irqrestore(&task->task_state_lock, flags);
1500         mvi_dev->dev_status = MVS_DEV_EH;
1501         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1502                 struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1503
1504                 int_to_scsilun(cmnd->device->lun, &lun);
1505                 rc = mvs_find_tag(mvi, task, &tag);
1506                 if (rc == 0) {
1507                         mv_printk("No such tag in %s\n", __func__);
1508                         rc = TMF_RESP_FUNC_FAILED;
1509                         return rc;
1510                 }
1511
1512                 tmf_task.tmf = TMF_ABORT_TASK;
1513                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1514
1515                 rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1516
1517                 /* if successful, clear the task and callback forwards.*/
1518                 if (rc == TMF_RESP_FUNC_COMPLETE) {
1519                         u32 slot_no;
1520                         struct mvs_slot_info *slot;
1521
1522                         if (task->lldd_task) {
1523                                 slot = task->lldd_task;
1524                                 slot_no = (u32) (slot - mvi->slot_info);
1525                                 spin_lock_irqsave(&mvi->lock, flags);
1526                                 mvs_slot_complete(mvi, slot_no, 1);
1527                                 spin_unlock_irqrestore(&mvi->lock, flags);
1528                         }
1529                 }
1530
1531         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1532                 task->task_proto & SAS_PROTOCOL_STP) {
1533                 if (SAS_SATA_DEV == dev->dev_type) {
1534                         struct mvs_slot_info *slot = task->lldd_task;
1535                         u32 slot_idx = (u32)(slot - mvi->slot_info);
1536                         mv_dprintk("mvs_abort_task() mvi=%p task=%p "
1537                                    "slot=%p slot_idx=x%x\n",
1538                                    mvi, task, slot, slot_idx);
1539                         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1540                         mvs_slot_task_free(mvi, task, slot, slot_idx);
1541                         rc = TMF_RESP_FUNC_COMPLETE;
1542                         goto out;
1543                 }
1544
1545         }
1546 out:
1547         if (rc != TMF_RESP_FUNC_COMPLETE)
1548                 mv_printk("%s:rc= %d\n", __func__, rc);
1549         return rc;
1550 }
1551
1552 int mvs_abort_task_set(struct domain_device *dev, u8 *lun)
1553 {
1554         int rc = TMF_RESP_FUNC_FAILED;
1555         struct mvs_tmf_task tmf_task;
1556
1557         tmf_task.tmf = TMF_ABORT_TASK_SET;
1558         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1559
1560         return rc;
1561 }
1562
1563 int mvs_clear_aca(struct domain_device *dev, u8 *lun)
1564 {
1565         int rc = TMF_RESP_FUNC_FAILED;
1566         struct mvs_tmf_task tmf_task;
1567
1568         tmf_task.tmf = TMF_CLEAR_ACA;
1569         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1570
1571         return rc;
1572 }
1573
1574 int mvs_clear_task_set(struct domain_device *dev, u8 *lun)
1575 {
1576         int rc = TMF_RESP_FUNC_FAILED;
1577         struct mvs_tmf_task tmf_task;
1578
1579         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1580         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1581
1582         return rc;
1583 }
1584
1585 static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
1586                         u32 slot_idx, int err)
1587 {
1588         struct mvs_device *mvi_dev = task->dev->lldd_dev;
1589         struct task_status_struct *tstat = &task->task_status;
1590         struct ata_task_resp *resp = (struct ata_task_resp *)tstat->buf;
1591         int stat = SAM_STAT_GOOD;
1592
1593
1594         resp->frame_len = sizeof(struct dev_to_host_fis);
1595         memcpy(&resp->ending_fis[0],
1596                SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset),
1597                sizeof(struct dev_to_host_fis));
1598         tstat->buf_valid_size = sizeof(*resp);
1599         if (unlikely(err)) {
1600                 if (unlikely(err & CMD_ISS_STPD))
1601                         stat = SAS_OPEN_REJECT;
1602                 else
1603                         stat = SAS_PROTO_RESPONSE;
1604        }
1605
1606         return stat;
1607 }
1608
1609 void mvs_set_sense(u8 *buffer, int len, int d_sense,
1610                 int key, int asc, int ascq)
1611 {
1612         memset(buffer, 0, len);
1613
1614         if (d_sense) {
1615                 /* Descriptor format */
1616                 if (len < 4) {
1617                         mv_printk("Length %d of sense buffer too small to "
1618                                 "fit sense %x:%x:%x", len, key, asc, ascq);
1619                 }
1620
1621                 buffer[0] = 0x72;               /* Response Code        */
1622                 if (len > 1)
1623                         buffer[1] = key;        /* Sense Key */
1624                 if (len > 2)
1625                         buffer[2] = asc;        /* ASC  */
1626                 if (len > 3)
1627                         buffer[3] = ascq;       /* ASCQ */
1628         } else {
1629                 if (len < 14) {
1630                         mv_printk("Length %d of sense buffer too small to "
1631                                 "fit sense %x:%x:%x", len, key, asc, ascq);
1632                 }
1633
1634                 buffer[0] = 0x70;               /* Response Code        */
1635                 if (len > 2)
1636                         buffer[2] = key;        /* Sense Key */
1637                 if (len > 7)
1638                         buffer[7] = 0x0a;       /* Additional Sense Length */
1639                 if (len > 12)
1640                         buffer[12] = asc;       /* ASC */
1641                 if (len > 13)
1642                         buffer[13] = ascq; /* ASCQ */
1643         }
1644
1645         return;
1646 }
1647
1648 void mvs_fill_ssp_resp_iu(struct ssp_response_iu *iu,
1649                                 u8 key, u8 asc, u8 asc_q)
1650 {
1651         iu->datapres = 2;
1652         iu->response_data_len = 0;
1653         iu->sense_data_len = 17;
1654         iu->status = 02;
1655         mvs_set_sense(iu->sense_data, 17, 0,
1656                         key, asc, asc_q);
1657 }
1658
1659 static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task,
1660                          u32 slot_idx)
1661 {
1662         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1663         int stat;
1664         u32 err_dw0 = le32_to_cpu(*(u32 *)slot->response);
1665         u32 err_dw1 = le32_to_cpu(*((u32 *)slot->response + 1));
1666         u32 tfs = 0;
1667         enum mvs_port_type type = PORT_TYPE_SAS;
1668
1669         if (err_dw0 & CMD_ISS_STPD)
1670                 MVS_CHIP_DISP->issue_stop(mvi, type, tfs);
1671
1672         MVS_CHIP_DISP->command_active(mvi, slot_idx);
1673
1674         stat = SAM_STAT_CHECK_CONDITION;
1675         switch (task->task_proto) {
1676         case SAS_PROTOCOL_SSP:
1677         {
1678                 stat = SAS_ABORTED_TASK;
1679                 if ((err_dw0 & NO_DEST) || err_dw1 & bit(31)) {
1680                         struct ssp_response_iu *iu = slot->response +
1681                                 sizeof(struct mvs_err_info);
1682                         mvs_fill_ssp_resp_iu(iu, NOT_READY, 0x04, 01);
1683                         sas_ssp_task_response(mvi->dev, task, iu);
1684                         stat = SAM_STAT_CHECK_CONDITION;
1685                 }
1686                 if (err_dw1 & bit(31))
1687                         mv_printk("reuse same slot, retry command.\n");
1688                 break;
1689         }
1690         case SAS_PROTOCOL_SMP:
1691                 stat = SAM_STAT_CHECK_CONDITION;
1692                 break;
1693
1694         case SAS_PROTOCOL_SATA:
1695         case SAS_PROTOCOL_STP:
1696         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
1697         {
1698                 task->ata_task.use_ncq = 0;
1699                 stat = SAS_PROTO_RESPONSE;
1700                 mvs_sata_done(mvi, task, slot_idx, err_dw0);
1701         }
1702                 break;
1703         default:
1704                 break;
1705         }
1706
1707         return stat;
1708 }
1709
1710 int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
1711 {
1712         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1713         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1714         struct sas_task *task = slot->task;
1715         struct mvs_device *mvi_dev = NULL;
1716         struct task_status_struct *tstat;
1717         struct domain_device *dev;
1718         u32 aborted;
1719
1720         void *to;
1721         enum exec_status sts;
1722
1723         if (unlikely(!task || !task->lldd_task || !task->dev))
1724                 return -1;
1725
1726         tstat = &task->task_status;
1727         dev = task->dev;
1728         mvi_dev = dev->lldd_dev;
1729
1730         spin_lock(&task->task_state_lock);
1731         task->task_state_flags &=
1732                 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1733         task->task_state_flags |= SAS_TASK_STATE_DONE;
1734         /* race condition*/
1735         aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED;
1736         spin_unlock(&task->task_state_lock);
1737
1738         memset(tstat, 0, sizeof(*tstat));
1739         tstat->resp = SAS_TASK_COMPLETE;
1740
1741         if (unlikely(aborted)) {
1742                 tstat->stat = SAS_ABORTED_TASK;
1743                 if (mvi_dev && mvi_dev->running_req)
1744                         mvi_dev->running_req--;
1745                 if (sas_protocol_ata(task->task_proto))
1746                         mvs_free_reg_set(mvi, mvi_dev);
1747
1748                 mvs_slot_task_free(mvi, task, slot, slot_idx);
1749                 return -1;
1750         }
1751
1752         /* when no device attaching, go ahead and complete by error handling*/
1753         if (unlikely(!mvi_dev || flags)) {
1754                 if (!mvi_dev)
1755                         mv_dprintk("port has not device.\n");
1756                 tstat->stat = SAS_PHY_DOWN;
1757                 goto out;
1758         }
1759
1760         /*
1761          * error info record present; slot->response is 32 bit aligned but may
1762          * not be 64 bit aligned, so check for zero in two 32 bit reads
1763          */
1764         if (unlikely((rx_desc & RXQ_ERR)
1765                      && (*((u32 *)slot->response)
1766                          || *(((u32 *)slot->response) + 1)))) {
1767                 mv_dprintk("port %d slot %d rx_desc %X has error info"
1768                         "%016llX.\n", slot->port->sas_port.id, slot_idx,
1769                          rx_desc, get_unaligned_le64(slot->response));
1770                 tstat->stat = mvs_slot_err(mvi, task, slot_idx);
1771                 tstat->resp = SAS_TASK_COMPLETE;
1772                 goto out;
1773         }
1774
1775         switch (task->task_proto) {
1776         case SAS_PROTOCOL_SSP:
1777                 /* hw says status == 0, datapres == 0 */
1778                 if (rx_desc & RXQ_GOOD) {
1779                         tstat->stat = SAM_STAT_GOOD;
1780                         tstat->resp = SAS_TASK_COMPLETE;
1781                 }
1782                 /* response frame present */
1783                 else if (rx_desc & RXQ_RSP) {
1784                         struct ssp_response_iu *iu = slot->response +
1785                                                 sizeof(struct mvs_err_info);
1786                         sas_ssp_task_response(mvi->dev, task, iu);
1787                 } else
1788                         tstat->stat = SAM_STAT_CHECK_CONDITION;
1789                 break;
1790
1791         case SAS_PROTOCOL_SMP: {
1792                         struct scatterlist *sg_resp = &task->smp_task.smp_resp;
1793                         tstat->stat = SAM_STAT_GOOD;
1794                         to = kmap_atomic(sg_page(sg_resp));
1795                         memcpy(to + sg_resp->offset,
1796                                 slot->response + sizeof(struct mvs_err_info),
1797                                 sg_dma_len(sg_resp));
1798                         kunmap_atomic(to);
1799                         break;
1800                 }
1801
1802         case SAS_PROTOCOL_SATA:
1803         case SAS_PROTOCOL_STP:
1804         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: {
1805                         tstat->stat = mvs_sata_done(mvi, task, slot_idx, 0);
1806                         break;
1807                 }
1808
1809         default:
1810                 tstat->stat = SAM_STAT_CHECK_CONDITION;
1811                 break;
1812         }
1813         if (!slot->port->port_attached) {
1814                 mv_dprintk("port %d has removed.\n", slot->port->sas_port.id);
1815                 tstat->stat = SAS_PHY_DOWN;
1816         }
1817
1818
1819 out:
1820         if (mvi_dev && mvi_dev->running_req) {
1821                 mvi_dev->running_req--;
1822                 if (sas_protocol_ata(task->task_proto) && !mvi_dev->running_req)
1823                         mvs_free_reg_set(mvi, mvi_dev);
1824         }
1825         mvs_slot_task_free(mvi, task, slot, slot_idx);
1826         sts = tstat->stat;
1827
1828         spin_unlock(&mvi->lock);
1829         if (task->task_done)
1830                 task->task_done(task);
1831
1832         spin_lock(&mvi->lock);
1833
1834         return sts;
1835 }
1836
1837 void mvs_do_release_task(struct mvs_info *mvi,
1838                 int phy_no, struct domain_device *dev)
1839 {
1840         u32 slot_idx;
1841         struct mvs_phy *phy;
1842         struct mvs_port *port;
1843         struct mvs_slot_info *slot, *slot2;
1844
1845         phy = &mvi->phy[phy_no];
1846         port = phy->port;
1847         if (!port)
1848                 return;
1849         /* clean cmpl queue in case request is already finished */
1850         mvs_int_rx(mvi, false);
1851
1852
1853
1854         list_for_each_entry_safe(slot, slot2, &port->list, entry) {
1855                 struct sas_task *task;
1856                 slot_idx = (u32) (slot - mvi->slot_info);
1857                 task = slot->task;
1858
1859                 if (dev && task->dev != dev)
1860                         continue;
1861
1862                 mv_printk("Release slot [%x] tag[%x], task [%p]:\n",
1863                         slot_idx, slot->slot_tag, task);
1864                 MVS_CHIP_DISP->command_active(mvi, slot_idx);
1865
1866                 mvs_slot_complete(mvi, slot_idx, 1);
1867         }
1868 }
1869
1870 void mvs_release_task(struct mvs_info *mvi,
1871                       struct domain_device *dev)
1872 {
1873         int i, phyno[WIDE_PORT_MAX_PHY], num;
1874         num = mvs_find_dev_phyno(dev, phyno);
1875         for (i = 0; i < num; i++)
1876                 mvs_do_release_task(mvi, phyno[i], dev);
1877 }
1878
1879 static void mvs_phy_disconnected(struct mvs_phy *phy)
1880 {
1881         phy->phy_attached = 0;
1882         phy->att_dev_info = 0;
1883         phy->att_dev_sas_addr = 0;
1884 }
1885
1886 static void mvs_work_queue(struct work_struct *work)
1887 {
1888         struct delayed_work *dw = container_of(work, struct delayed_work, work);
1889         struct mvs_wq *mwq = container_of(dw, struct mvs_wq, work_q);
1890         struct mvs_info *mvi = mwq->mvi;
1891         unsigned long flags;
1892         u32 phy_no = (unsigned long) mwq->data;
1893         struct sas_ha_struct *sas_ha = mvi->sas;
1894         struct mvs_phy *phy = &mvi->phy[phy_no];
1895         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1896
1897         spin_lock_irqsave(&mvi->lock, flags);
1898         if (mwq->handler & PHY_PLUG_EVENT) {
1899
1900                 if (phy->phy_event & PHY_PLUG_OUT) {
1901                         u32 tmp;
1902                         struct sas_identify_frame *id;
1903                         id = (struct sas_identify_frame *)phy->frame_rcvd;
1904                         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no);
1905                         phy->phy_event &= ~PHY_PLUG_OUT;
1906                         if (!(tmp & PHY_READY_MASK)) {
1907                                 sas_phy_disconnected(sas_phy);
1908                                 mvs_phy_disconnected(phy);
1909                                 sas_ha->notify_phy_event(sas_phy,
1910                                         PHYE_LOSS_OF_SIGNAL);
1911                                 mv_dprintk("phy%d Removed Device\n", phy_no);
1912                         } else {
1913                                 MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1914                                 mvs_update_phyinfo(mvi, phy_no, 1);
1915                                 mvs_bytes_dmaed(mvi, phy_no);
1916                                 mvs_port_notify_formed(sas_phy, 0);
1917                                 mv_dprintk("phy%d Attached Device\n", phy_no);
1918                         }
1919                 }
1920         } else if (mwq->handler & EXP_BRCT_CHG) {
1921                 phy->phy_event &= ~EXP_BRCT_CHG;
1922                 sas_ha->notify_port_event(sas_phy,
1923                                 PORTE_BROADCAST_RCVD);
1924                 mv_dprintk("phy%d Got Broadcast Change\n", phy_no);
1925         }
1926         list_del(&mwq->entry);
1927         spin_unlock_irqrestore(&mvi->lock, flags);
1928         kfree(mwq);
1929 }
1930
1931 static int mvs_handle_event(struct mvs_info *mvi, void *data, int handler)
1932 {
1933         struct mvs_wq *mwq;
1934         int ret = 0;
1935
1936         mwq = kmalloc(sizeof(struct mvs_wq), GFP_ATOMIC);
1937         if (mwq) {
1938                 mwq->mvi = mvi;
1939                 mwq->data = data;
1940                 mwq->handler = handler;
1941                 MV_INIT_DELAYED_WORK(&mwq->work_q, mvs_work_queue, mwq);
1942                 list_add_tail(&mwq->entry, &mvi->wq_list);
1943                 schedule_delayed_work(&mwq->work_q, HZ * 2);
1944         } else
1945                 ret = -ENOMEM;
1946
1947         return ret;
1948 }
1949
1950 static void mvs_sig_time_out(unsigned long tphy)
1951 {
1952         struct mvs_phy *phy = (struct mvs_phy *)tphy;
1953         struct mvs_info *mvi = phy->mvi;
1954         u8 phy_no;
1955
1956         for (phy_no = 0; phy_no < mvi->chip->n_phy; phy_no++) {
1957                 if (&mvi->phy[phy_no] == phy) {
1958                         mv_dprintk("Get signature time out, reset phy %d\n",
1959                                 phy_no+mvi->id*mvi->chip->n_phy);
1960                         MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_HARD_RESET);
1961                 }
1962         }
1963 }
1964
1965 void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
1966 {
1967         u32 tmp;
1968         struct mvs_phy *phy = &mvi->phy[phy_no];
1969
1970         phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, phy_no);
1971         MVS_CHIP_DISP->write_port_irq_stat(mvi, phy_no, phy->irq_status);
1972         mv_dprintk("phy %d ctrl sts=0x%08X.\n", phy_no+mvi->id*mvi->chip->n_phy,
1973                 MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no));
1974         mv_dprintk("phy %d irq sts = 0x%08X\n", phy_no+mvi->id*mvi->chip->n_phy,
1975                 phy->irq_status);
1976
1977         /*
1978         * events is port event now ,
1979         * we need check the interrupt status which belongs to per port.
1980         */
1981
1982         if (phy->irq_status & PHYEV_DCDR_ERR) {
1983                 mv_dprintk("phy %d STP decoding error.\n",
1984                 phy_no + mvi->id*mvi->chip->n_phy);
1985         }
1986
1987         if (phy->irq_status & PHYEV_POOF) {
1988                 mdelay(500);
1989                 if (!(phy->phy_event & PHY_PLUG_OUT)) {
1990                         int dev_sata = phy->phy_type & PORT_TYPE_SATA;
1991                         int ready;
1992                         mvs_do_release_task(mvi, phy_no, NULL);
1993                         phy->phy_event |= PHY_PLUG_OUT;
1994                         MVS_CHIP_DISP->clear_srs_irq(mvi, 0, 1);
1995                         mvs_handle_event(mvi,
1996                                 (void *)(unsigned long)phy_no,
1997                                 PHY_PLUG_EVENT);
1998                         ready = mvs_is_phy_ready(mvi, phy_no);
1999                         if (ready || dev_sata) {
2000                                 if (MVS_CHIP_DISP->stp_reset)
2001                                         MVS_CHIP_DISP->stp_reset(mvi,
2002                                                         phy_no);
2003                                 else
2004                                         MVS_CHIP_DISP->phy_reset(mvi,
2005                                                         phy_no, MVS_SOFT_RESET);
2006                                 return;
2007                         }
2008                 }
2009         }
2010
2011         if (phy->irq_status & PHYEV_COMWAKE) {
2012                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, phy_no);
2013                 MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
2014                                         tmp | PHYEV_SIG_FIS);
2015                 if (phy->timer.function == NULL) {
2016                         phy->timer.data = (unsigned long)phy;
2017                         phy->timer.function = mvs_sig_time_out;
2018                         phy->timer.expires = jiffies + 5*HZ;
2019                         add_timer(&phy->timer);
2020                 }
2021         }
2022         if (phy->irq_status & (PHYEV_SIG_FIS | PHYEV_ID_DONE)) {
2023                 phy->phy_status = mvs_is_phy_ready(mvi, phy_no);
2024                 mv_dprintk("notify plug in on phy[%d]\n", phy_no);
2025                 if (phy->phy_status) {
2026                         mdelay(10);
2027                         MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
2028                         if (phy->phy_type & PORT_TYPE_SATA) {
2029                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(
2030                                                 mvi, phy_no);
2031                                 tmp &= ~PHYEV_SIG_FIS;
2032                                 MVS_CHIP_DISP->write_port_irq_mask(mvi,
2033                                                         phy_no, tmp);
2034                         }
2035                         mvs_update_phyinfo(mvi, phy_no, 0);
2036                         if (phy->phy_type & PORT_TYPE_SAS) {
2037                                 MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_PHY_TUNE);
2038                                 mdelay(10);
2039                         }
2040
2041                         mvs_bytes_dmaed(mvi, phy_no);
2042                         /* whether driver is going to handle hot plug */
2043                         if (phy->phy_event & PHY_PLUG_OUT) {
2044                                 mvs_port_notify_formed(&phy->sas_phy, 0);
2045                                 phy->phy_event &= ~PHY_PLUG_OUT;
2046                         }
2047                 } else {
2048                         mv_dprintk("plugin interrupt but phy%d is gone\n",
2049                                 phy_no + mvi->id*mvi->chip->n_phy);
2050                 }
2051         } else if (phy->irq_status & PHYEV_BROAD_CH) {
2052                 mv_dprintk("phy %d broadcast change.\n",
2053                         phy_no + mvi->id*mvi->chip->n_phy);
2054                 mvs_handle_event(mvi, (void *)(unsigned long)phy_no,
2055                                 EXP_BRCT_CHG);
2056         }
2057 }
2058
2059 int mvs_int_rx(struct mvs_info *mvi, bool self_clear)
2060 {
2061         u32 rx_prod_idx, rx_desc;
2062         bool attn = false;
2063
2064         /* the first dword in the RX ring is special: it contains
2065          * a mirror of the hardware's RX producer index, so that
2066          * we don't have to stall the CPU reading that register.
2067          * The actual RX ring is offset by one dword, due to this.
2068          */
2069         rx_prod_idx = mvi->rx_cons;
2070         mvi->rx_cons = le32_to_cpu(mvi->rx[0]);
2071         if (mvi->rx_cons == 0xfff)      /* h/w hasn't touched RX ring yet */
2072                 return 0;
2073
2074         /* The CMPL_Q may come late, read from register and try again
2075         * note: if coalescing is enabled,
2076         * it will need to read from register every time for sure
2077         */
2078         if (unlikely(mvi->rx_cons == rx_prod_idx))
2079                 mvi->rx_cons = MVS_CHIP_DISP->rx_update(mvi) & RX_RING_SZ_MASK;
2080
2081         if (mvi->rx_cons == rx_prod_idx)
2082                 return 0;
2083
2084         while (mvi->rx_cons != rx_prod_idx) {
2085                 /* increment our internal RX consumer pointer */
2086                 rx_prod_idx = (rx_prod_idx + 1) & (MVS_RX_RING_SZ - 1);
2087                 rx_desc = le32_to_cpu(mvi->rx[rx_prod_idx + 1]);
2088
2089                 if (likely(rx_desc & RXQ_DONE))
2090                         mvs_slot_complete(mvi, rx_desc, 0);
2091                 if (rx_desc & RXQ_ATTN) {
2092                         attn = true;
2093                 } else if (rx_desc & RXQ_ERR) {
2094                         if (!(rx_desc & RXQ_DONE))
2095                                 mvs_slot_complete(mvi, rx_desc, 0);
2096                 } else if (rx_desc & RXQ_SLOT_RESET) {
2097                         mvs_slot_free(mvi, rx_desc);
2098                 }
2099         }
2100
2101         if (attn && self_clear)
2102                 MVS_CHIP_DISP->int_full(mvi);
2103         return 0;
2104 }
2105