git.oblomov.eu Git - linux-2.6/blob - 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  *
   7  * This file is licensed under GPLv2.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; version 2 of the
  12  * License.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22  * USA
  23 */
  24
  25 #include "mv_sas.h"
  26
  27 static int mvs_find_tag(struct mvs_info *mvi, struct sas_task *task, u32 *tag)
  28 {
  29         if (task->lldd_task) {
  30                 struct mvs_slot_info *slot;
  31                 slot = (struct mvs_slot_info *) task->lldd_task;
  32                 *tag = slot->slot_tag;
  33                 return 1;
  34         }
  35         return 0;
  36 }
  37
  38 void mvs_tag_clear(struct mvs_info *mvi, u32 tag)
  39 {
  40         void *bitmap = (void *) &mvi->tags;
  41         clear_bit(tag, bitmap);
  42 }
  43
  44 void mvs_tag_free(struct mvs_info *mvi, u32 tag)
  45 {
  46         mvs_tag_clear(mvi, tag);
  47 }
  48
  49 void mvs_tag_set(struct mvs_info *mvi, unsigned int tag)
  50 {
  51         void *bitmap = (void *) &mvi->tags;
  52         set_bit(tag, bitmap);
  53 }
  54
  55 inline int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out)
  56 {
  57         unsigned int index, tag;
  58         void *bitmap = (void *) &mvi->tags;
  59
  60         index = find_first_zero_bit(bitmap, mvi->tags_num);
  61         tag = index;
  62         if (tag >= mvi->tags_num)
  63                 return -SAS_QUEUE_FULL;
  64         mvs_tag_set(mvi, tag);
  65         *tag_out = tag;
  66         return 0;
  67 }
  68
  69 void mvs_tag_init(struct mvs_info *mvi)
  70 {
  71         int i;
  72         for (i = 0; i < mvi->tags_num; ++i)
  73                 mvs_tag_clear(mvi, i);
  74 }
  75
  76 void mvs_hexdump(u32 size, u8 *data, u32 baseaddr)
  77 {
  78         u32 i;
  79         u32 run;
  80         u32 offset;
  81
  82         offset = 0;
  83         while (size) {
  84                 printk(KERN_DEBUG"%08X : ", baseaddr + offset);
  85                 if (size >= 16)
  86                         run = 16;
  87                 else
  88                         run = size;
  89                 size -= run;
  90                 for (i = 0; i < 16; i++) {
  91                         if (i < run)
  92                                 printk(KERN_DEBUG"%02X ", (u32)data[i]);
  93                         else
  94                                 printk(KERN_DEBUG"   ");
  95                 }
  96                 printk(KERN_DEBUG": ");
  97                 for (i = 0; i < run; i++)
  98                         printk(KERN_DEBUG"%c",
  99                                 isalnum(data[i]) ? data[i] : '.');
 100                 printk(KERN_DEBUG"\n");
 101                 data = &data[16];
 102                 offset += run;
 103         }
 104         printk(KERN_DEBUG"\n");
 105 }
 106
 107 #if (_MV_DUMP > 1)
 108 static void mvs_hba_sb_dump(struct mvs_info *mvi, u32 tag,
 109                                    enum sas_protocol proto)
 110 {
 111         u32 offset;
 112         struct mvs_slot_info *slot = &mvi->slot_info[tag];
 113
 114         offset = slot->cmd_size + MVS_OAF_SZ +
 115             MVS_CHIP_DISP->prd_size() * slot->n_elem;
 116         dev_printk(KERN_DEBUG, mvi->dev, "+---->Status buffer[%d] :\n",
 117                         tag);
 118         mvs_hexdump(32, (u8 *) slot->response,
 119                     (u32) slot->buf_dma + offset);
 120 }
 121 #endif
 122
 123 static void mvs_hba_memory_dump(struct mvs_info *mvi, u32 tag,
 124                                 enum sas_protocol proto)
 125 {
 126 #if (_MV_DUMP > 1)
 127         u32 sz, w_ptr;
 128         u64 addr;
 129         struct mvs_slot_info *slot = &mvi->slot_info[tag];
 130
 131         /*Delivery Queue */
 132         sz = MVS_CHIP_SLOT_SZ;
 133         w_ptr = slot->tx;
 134         addr = mvi->tx_dma;
 135         dev_printk(KERN_DEBUG, mvi->dev,
 136                 "Delivery Queue Size=%04d , WRT_PTR=%04X\n", sz, w_ptr);
 137         dev_printk(KERN_DEBUG, mvi->dev,
 138                 "Delivery Queue Base Address=0x%llX (PA)"
 139                 "(tx_dma=0x%llX), Entry=%04d\n",
 140                 addr, (unsigned long long)mvi->tx_dma, w_ptr);
 141         mvs_hexdump(sizeof(u32), (u8 *)(&mvi->tx[mvi->tx_prod]),
 142                         (u32) mvi->tx_dma + sizeof(u32) * w_ptr);
 143         /*Command List */
 144         addr = mvi->slot_dma;
 145         dev_printk(KERN_DEBUG, mvi->dev,
 146                 "Command List Base Address=0x%llX (PA)"
 147                 "(slot_dma=0x%llX), Header=%03d\n",
 148                 addr, (unsigned long long)slot->buf_dma, tag);
 149         dev_printk(KERN_DEBUG, mvi->dev, "Command Header[%03d]:\n", tag);
 150         /*mvs_cmd_hdr */
 151         mvs_hexdump(sizeof(struct mvs_cmd_hdr), (u8 *)(&mvi->slot[tag]),
 152                 (u32) mvi->slot_dma + tag * sizeof(struct mvs_cmd_hdr));
 153         /*1.command table area */
 154         dev_printk(KERN_DEBUG, mvi->dev, "+---->Command Table :\n");
 155         mvs_hexdump(slot->cmd_size, (u8 *) slot->buf, (u32) slot->buf_dma);
 156         /*2.open address frame area */
 157         dev_printk(KERN_DEBUG, mvi->dev, "+---->Open Address Frame :\n");
 158         mvs_hexdump(MVS_OAF_SZ, (u8 *) slot->buf + slot->cmd_size,
 159                                 (u32) slot->buf_dma + slot->cmd_size);
 160         /*3.status buffer */
 161         mvs_hba_sb_dump(mvi, tag, proto);
 162         /*4.PRD table */
 163         dev_printk(KERN_DEBUG, mvi->dev, "+---->PRD table :\n");
 164         mvs_hexdump(MVS_CHIP_DISP->prd_size() * slot->n_elem,
 165                 (u8 *) slot->buf + slot->cmd_size + MVS_OAF_SZ,
 166                 (u32) slot->buf_dma + slot->cmd_size + MVS_OAF_SZ);
 167 #endif
 168 }
 169
 170 static void mvs_hba_cq_dump(struct mvs_info *mvi)
 171 {
 172 #if (_MV_DUMP > 2)
 173         u64 addr;
 174         void __iomem *regs = mvi->regs;
 175         u32 entry = mvi->rx_cons + 1;
 176         u32 rx_desc = le32_to_cpu(mvi->rx[entry]);
 177
 178         /*Completion Queue */
 179         addr = mr32(RX_HI) << 16 << 16 | mr32(RX_LO);
 180         dev_printk(KERN_DEBUG, mvi->dev, "Completion Task = 0x%p\n",
 181                    mvi->slot_info[rx_desc & RXQ_SLOT_MASK].task);
 182         dev_printk(KERN_DEBUG, mvi->dev,
 183                 "Completion List Base Address=0x%llX (PA), "
 184                 "CQ_Entry=%04d, CQ_WP=0x%08X\n",
 185                 addr, entry - 1, mvi->rx[0]);
 186         mvs_hexdump(sizeof(u32), (u8 *)(&rx_desc),
 187                     mvi->rx_dma + sizeof(u32) * entry);
 188 #endif
 189 }
 190
 191 void mvs_get_sas_addr(void *buf, u32 buflen)
 192 {
 193         /*memcpy(buf, "\x50\x05\x04\x30\x11\xab\x64\x40", 8);*/
 194 }
 195
 196 struct mvs_info *mvs_find_dev_mvi(struct domain_device *dev)
 197 {
 198         unsigned long i = 0, j = 0, hi = 0;
 199         struct sas_ha_struct *sha = dev->port->ha;
 200         struct mvs_info *mvi = NULL;
 201         struct asd_sas_phy *phy;
 202
 203         while (sha->sas_port[i]) {
 204                 if (sha->sas_port[i] == dev->port) {
 205                         phy =  container_of(sha->sas_port[i]->phy_list.next,
 206                                 struct asd_sas_phy, port_phy_el);
 207                         j = 0;
 208                         while (sha->sas_phy[j]) {
 209                                 if (sha->sas_phy[j] == phy)
 210                                         break;
 211                                 j++;
 212                         }
 213                         break;
 214                 }
 215                 i++;
 216         }
 217         hi = j/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
 218         mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
 219
 220         return mvi;
 221
 222 }
 223
 224 /* FIXME */
 225 int mvs_find_dev_phyno(struct domain_device *dev, int *phyno)
 226 {
 227         unsigned long i = 0, j = 0, n = 0, num = 0;
 228         struct mvs_info *mvi = mvs_find_dev_mvi(dev);
 229         struct sas_ha_struct *sha = dev->port->ha;
 230
 231         while (sha->sas_port[i]) {
 232                 if (sha->sas_port[i] == dev->port) {
 233                         struct asd_sas_phy *phy;
 234                         list_for_each_entry(phy,
 235                                 &sha->sas_port[i]->phy_list, port_phy_el) {
 236                                 j = 0;
 237                                 while (sha->sas_phy[j]) {
 238                                         if (sha->sas_phy[j] == phy)
 239                                                 break;
 240                                         j++;
 241                                 }
 242                                 phyno[n] = (j >= mvi->chip->n_phy) ?
 243                                         (j - mvi->chip->n_phy) : j;
 244                                 num++;
 245                                 n++;
 246                         }
 247                         break;
 248                 }
 249                 i++;
 250         }
 251         return num;
 252 }
 253
 254 static inline void mvs_free_reg_set(struct mvs_info *mvi,
 255                                 struct mvs_device *dev)
 256 {
 257         if (!dev) {
 258                 mv_printk("device has been free.\n");
 259                 return;
 260         }
 261         if (dev->runing_req != 0)
 262                 return;
 263         if (dev->taskfileset == MVS_ID_NOT_MAPPED)
 264                 return;
 265         MVS_CHIP_DISP->free_reg_set(mvi, &dev->taskfileset);
 266 }
 267
 268 static inline u8 mvs_assign_reg_set(struct mvs_info *mvi,
 269                                 struct mvs_device *dev)
 270 {
 271         if (dev->taskfileset != MVS_ID_NOT_MAPPED)
 272                 return 0;
 273         return MVS_CHIP_DISP->assign_reg_set(mvi, &dev->taskfileset);
 274 }
 275
 276 void mvs_phys_reset(struct mvs_info *mvi, u32 phy_mask, int hard)
 277 {
 278         u32 no;
 279         for_each_phy(phy_mask, phy_mask, no) {
 280                 if (!(phy_mask & 1))
 281                         continue;
 282                 MVS_CHIP_DISP->phy_reset(mvi, no, hard);
 283         }
 284 }
 285
 286 /* FIXME: locking? */
 287 int mvs_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 288                         void *funcdata)
 289 {
 290         int rc = 0, phy_id = sas_phy->id;
 291         u32 tmp, i = 0, hi;
 292         struct sas_ha_struct *sha = sas_phy->ha;
 293         struct mvs_info *mvi = NULL;
 294
 295         while (sha->sas_phy[i]) {
 296                 if (sha->sas_phy[i] == sas_phy)
 297                         break;
 298                 i++;
 299         }
 300         hi = i/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
 301         mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
 302
 303         switch (func) {
 304         case PHY_FUNC_SET_LINK_RATE:
 305                 MVS_CHIP_DISP->phy_set_link_rate(mvi, phy_id, funcdata);
 306                 break;
 307
 308         case PHY_FUNC_HARD_RESET:
 309                 tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_id);
 310                 if (tmp & PHY_RST_HARD)
 311                         break;
 312                 MVS_CHIP_DISP->phy_reset(mvi, phy_id, 1);
 313                 break;
 314
 315         case PHY_FUNC_LINK_RESET:
 316                 MVS_CHIP_DISP->phy_enable(mvi, phy_id);
 317                 MVS_CHIP_DISP->phy_reset(mvi, phy_id, 0);
 318                 break;
 319
 320         case PHY_FUNC_DISABLE:
 321                 MVS_CHIP_DISP->phy_disable(mvi, phy_id);
 322                 break;
 323         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 324         default:
 325                 rc = -EOPNOTSUPP;
 326         }
 327         msleep(200);
 328         return rc;
 329 }
 330
 331 void __devinit mvs_set_sas_addr(struct mvs_info *mvi, int port_id,
 332                                 u32 off_lo, u32 off_hi, u64 sas_addr)
 333 {
 334         u32 lo = (u32)sas_addr;
 335         u32 hi = (u32)(sas_addr>>32);
 336
 337         MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_lo);
 338         MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, lo);
 339         MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_hi);
 340         MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, hi);
 341 }
 342
 343 static void mvs_bytes_dmaed(struct mvs_info *mvi, int i)
 344 {
 345         struct mvs_phy *phy = &mvi->phy[i];
 346         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 347         struct sas_ha_struct *sas_ha;
 348         if (!phy->phy_attached)
 349                 return;
 350
 351         if (!(phy->att_dev_info & PORT_DEV_TRGT_MASK)
 352                 && phy->phy_type & PORT_TYPE_SAS) {
 353                 return;
 354         }
 355
 356         sas_ha = mvi->sas;
 357         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 358
 359         if (sas_phy->phy) {
 360                 struct sas_phy *sphy = sas_phy->phy;
 361
 362                 sphy->negotiated_linkrate = sas_phy->linkrate;
 363                 sphy->minimum_linkrate = phy->minimum_linkrate;
 364                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 365                 sphy->maximum_linkrate = phy->maximum_linkrate;
 366                 sphy->maximum_linkrate_hw = MVS_CHIP_DISP->phy_max_link_rate();
 367         }
 368
 369         if (phy->phy_type & PORT_TYPE_SAS) {
 370                 struct sas_identify_frame *id;
 371
 372                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 373                 id->dev_type = phy->identify.device_type;
 374                 id->initiator_bits = SAS_PROTOCOL_ALL;
 375                 id->target_bits = phy->identify.target_port_protocols;
 376         } else if (phy->phy_type & PORT_TYPE_SATA) {
 377                 /*Nothing*/
 378         }
 379         mv_dprintk("phy %d byte dmaded.\n", i + mvi->id * mvi->chip->n_phy);
 380
 381         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 382
 383         mvi->sas->notify_port_event(sas_phy,
 384                                    PORTE_BYTES_DMAED);
 385 }
 386
 387 int mvs_slave_alloc(struct scsi_device *scsi_dev)
 388 {
 389         struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
 390         if (dev_is_sata(dev)) {
 391                 /* We don't need to rescan targets
 392                  * if REPORT_LUNS request is failed
 393                  */
 394                 if (scsi_dev->lun > 0)
 395                         return -ENXIO;
 396                 scsi_dev->tagged_supported = 1;
 397         }
 398
 399         return sas_slave_alloc(scsi_dev);
 400 }
 401
 402 int mvs_slave_configure(struct scsi_device *sdev)
 403 {
 404         struct domain_device *dev = sdev_to_domain_dev(sdev);
 405         int ret = sas_slave_configure(sdev);
 406
 407         if (ret)
 408                 return ret;
 409         if (dev_is_sata(dev)) {
 410                 /* may set PIO mode */
 411         #if MV_DISABLE_NCQ
 412                 struct ata_port *ap = dev->sata_dev.ap;
 413                 struct ata_device *adev = ap->link.device;
 414                 adev->flags |= ATA_DFLAG_NCQ_OFF;
 415                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, 1);
 416         #endif
 417         }
 418         return 0;
 419 }
 420
 421 void mvs_scan_start(struct Scsi_Host *shost)
 422 {
 423         int i, j;
 424         unsigned short core_nr;
 425         struct mvs_info *mvi;
 426         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 427
 428         core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host;
 429
 430         for (j = 0; j < core_nr; j++) {
 431                 mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[j];
 432                 for (i = 0; i < mvi->chip->n_phy; ++i)
 433                         mvs_bytes_dmaed(mvi, i);
 434         }
 435 }
 436
 437 int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time)
 438 {
 439         /* give the phy enabling interrupt event time to come in (1s
 440          * is empirically about all it takes) */
 441         if (time < HZ)
 442                 return 0;
 443         /* Wait for discovery to finish */
 444         scsi_flush_work(shost);
 445         return 1;
 446 }
 447
 448 static int mvs_task_prep_smp(struct mvs_info *mvi,
 449                              struct mvs_task_exec_info *tei)
 450 {
 451         int elem, rc, i;
 452         struct sas_task *task = tei->task;
 453         struct mvs_cmd_hdr *hdr = tei->hdr;
 454         struct domain_device *dev = task->dev;
 455         struct asd_sas_port *sas_port = dev->port;
 456         struct scatterlist *sg_req, *sg_resp;
 457         u32 req_len, resp_len, tag = tei->tag;
 458         void *buf_tmp;
 459         u8 *buf_oaf;
 460         dma_addr_t buf_tmp_dma;
 461         void *buf_prd;
 462         struct mvs_slot_info *slot = &mvi->slot_info[tag];
 463         u32 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 464 #if _MV_DUMP
 465         u8 *buf_cmd;
 466         void *from;
 467 #endif
 468         /*
 469          * DMA-map SMP request, response buffers
 470          */
 471         sg_req = &task->smp_task.smp_req;
 472         elem = dma_map_sg(mvi->dev, sg_req, 1, PCI_DMA_TODEVICE);
 473         if (!elem)
 474                 return -ENOMEM;
 475         req_len = sg_dma_len(sg_req);
 476
 477         sg_resp = &task->smp_task.smp_resp;
 478         elem = dma_map_sg(mvi->dev, sg_resp, 1, PCI_DMA_FROMDEVICE);
 479         if (!elem) {
 480                 rc = -ENOMEM;
 481                 goto err_out;
 482         }
 483         resp_len = SB_RFB_MAX;
 484
 485         /* must be in dwords */
 486         if ((req_len & 0x3) || (resp_len & 0x3)) {
 487                 rc = -EINVAL;
 488                 goto err_out_2;
 489         }
 490
 491         /*
 492          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 493          */
 494
 495         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ***** */
 496         buf_tmp = slot->buf;
 497         buf_tmp_dma = slot->buf_dma;
 498
 499 #if _MV_DUMP
 500         buf_cmd = buf_tmp;
 501         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 502         buf_tmp += req_len;
 503         buf_tmp_dma += req_len;
 504         slot->cmd_size = req_len;
 505 #else
 506         hdr->cmd_tbl = cpu_to_le64(sg_dma_address(sg_req));
 507 #endif
 508
 509         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 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         if (tei->n_elem)
 519                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 520         else
 521                 hdr->prd_tbl = 0;
 522
 523         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 524         buf_tmp += i;
 525         buf_tmp_dma += i;
 526
 527         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 528         slot->response = buf_tmp;
 529         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 530         if (mvi->flags & MVF_FLAG_SOC)
 531                 hdr->reserved[0] = 0;
 532
 533         /*
 534          * Fill in TX ring and command slot header
 535          */
 536         slot->tx = mvi->tx_prod;
 537         mvi->tx[mvi->tx_prod] = cpu_to_le32((TXQ_CMD_SMP << TXQ_CMD_SHIFT) |
 538                                         TXQ_MODE_I | tag |
 539                                         (sas_port->phy_mask << TXQ_PHY_SHIFT));
 540
 541         hdr->flags |= flags;
 542         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | ((req_len - 4) / 4));
 543         hdr->tags = cpu_to_le32(tag);
 544         hdr->data_len = 0;
 545
 546         /* generate open address frame hdr (first 12 bytes) */
 547         /* initiator, SMP, ftype 1h */
 548         buf_oaf[0] = (1 << 7) | (PROTOCOL_SMP << 4) | 0x01;
 549         buf_oaf[1] = dev->linkrate & 0xf;
 550         *(u16 *)(buf_oaf + 2) = 0xFFFF;         /* SAS SPEC */
 551         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 552
 553         /* fill in PRD (scatter/gather) table, if any */
 554         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 555
 556 #if _MV_DUMP
 557         /* copy cmd table */
 558         from = kmap_atomic(sg_page(sg_req), KM_IRQ0);
 559         memcpy(buf_cmd, from + sg_req->offset, req_len);
 560         kunmap_atomic(from, KM_IRQ0);
 561 #endif
 562         return 0;
 563
 564 err_out_2:
 565         dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_resp, 1,
 566                      PCI_DMA_FROMDEVICE);
 567 err_out:
 568         dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_req, 1,
 569                      PCI_DMA_TODEVICE);
 570         return rc;
 571 }
 572
 573 static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag)
 574 {
 575         struct ata_queued_cmd *qc = task->uldd_task;
 576
 577         if (qc) {
 578                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 579                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 580                         *tag = qc->tag;
 581                         return 1;
 582                 }
 583         }
 584
 585         return 0;
 586 }
 587
 588 static int mvs_task_prep_ata(struct mvs_info *mvi,
 589                              struct mvs_task_exec_info *tei)
 590 {
 591         struct sas_task *task = tei->task;
 592         struct domain_device *dev = task->dev;
 593         struct mvs_device *mvi_dev =
 594                 (struct mvs_device *)dev->lldd_dev;
 595         struct mvs_cmd_hdr *hdr = tei->hdr;
 596         struct asd_sas_port *sas_port = dev->port;
 597         struct mvs_slot_info *slot;
 598         void *buf_prd;
 599         u32 tag = tei->tag, hdr_tag;
 600         u32 flags, del_q;
 601         void *buf_tmp;
 602         u8 *buf_cmd, *buf_oaf;
 603         dma_addr_t buf_tmp_dma;
 604         u32 i, req_len, resp_len;
 605         const u32 max_resp_len = SB_RFB_MAX;
 606
 607         if (mvs_assign_reg_set(mvi, mvi_dev) == MVS_ID_NOT_MAPPED) {
 608                 mv_dprintk("Have not enough regiset for dev %d.\n",
 609                         mvi_dev->device_id);
 610                 return -EBUSY;
 611         }
 612         slot = &mvi->slot_info[tag];
 613         slot->tx = mvi->tx_prod;
 614         del_q = TXQ_MODE_I | tag |
 615                 (TXQ_CMD_STP << TXQ_CMD_SHIFT) |
 616                 (sas_port->phy_mask << TXQ_PHY_SHIFT) |
 617                 (mvi_dev->taskfileset << TXQ_SRS_SHIFT);
 618         mvi->tx[mvi->tx_prod] = cpu_to_le32(del_q);
 619
 620 #ifndef DISABLE_HOTPLUG_DMA_FIX
 621         if (task->data_dir == DMA_FROM_DEVICE)
 622                 flags = (MVS_CHIP_DISP->prd_count() << MCH_PRD_LEN_SHIFT);
 623         else
 624                 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 625 #else
 626         flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 627 #endif
 628         if (task->ata_task.use_ncq)
 629                 flags |= MCH_FPDMA;
 630         if (dev->sata_dev.command_set == ATAPI_COMMAND_SET) {
 631                 if (task->ata_task.fis.command != ATA_CMD_ID_ATAPI)
 632                         flags |= MCH_ATAPI;
 633         }
 634
 635         /* FIXME: fill in port multiplier number */
 636
 637         hdr->flags = cpu_to_le32(flags);
 638
 639         /* FIXME: the low order order 5 bits for the TAG if enable NCQ */
 640         if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr_tag))
 641                 task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3);
 642         else
 643                 hdr_tag = tag;
 644
 645         hdr->tags = cpu_to_le32(hdr_tag);
 646
 647         hdr->data_len = cpu_to_le32(task->total_xfer_len);
 648
 649         /*
 650          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 651          */
 652
 653         /* region 1: command table area (MVS_ATA_CMD_SZ bytes) ************** */
 654         buf_cmd = buf_tmp = slot->buf;
 655         buf_tmp_dma = slot->buf_dma;
 656
 657         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 658
 659         buf_tmp += MVS_ATA_CMD_SZ;
 660         buf_tmp_dma += MVS_ATA_CMD_SZ;
 661 #if _MV_DUMP
 662         slot->cmd_size = MVS_ATA_CMD_SZ;
 663 #endif
 664
 665         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 666         /* used for STP.  unused for SATA? */
 667         buf_oaf = buf_tmp;
 668         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 669
 670         buf_tmp += MVS_OAF_SZ;
 671         buf_tmp_dma += MVS_OAF_SZ;
 672
 673         /* region 3: PRD table ********************************************* */
 674         buf_prd = buf_tmp;
 675
 676         if (tei->n_elem)
 677                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 678         else
 679                 hdr->prd_tbl = 0;
 680         i = MVS_CHIP_DISP->prd_size() * MVS_CHIP_DISP->prd_count();
 681
 682         buf_tmp += i;
 683         buf_tmp_dma += i;
 684
 685         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 686         /* FIXME: probably unused, for SATA.  kept here just in case
 687          * we get a STP/SATA error information record
 688          */
 689         slot->response = buf_tmp;
 690         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 691         if (mvi->flags & MVF_FLAG_SOC)
 692                 hdr->reserved[0] = 0;
 693
 694         req_len = sizeof(struct host_to_dev_fis);
 695         resp_len = MVS_SLOT_BUF_SZ - MVS_ATA_CMD_SZ -
 696             sizeof(struct mvs_err_info) - i;
 697
 698         /* request, response lengths */
 699         resp_len = min(resp_len, max_resp_len);
 700         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 701
 702         if (likely(!task->ata_task.device_control_reg_update))
 703                 task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
 704         /* fill in command FIS and ATAPI CDB */
 705         memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
 706         if (dev->sata_dev.command_set == ATAPI_COMMAND_SET)
 707                 memcpy(buf_cmd + STP_ATAPI_CMD,
 708                         task->ata_task.atapi_packet, 16);
 709
 710         /* generate open address frame hdr (first 12 bytes) */
 711         /* initiator, STP, ftype 1h */
 712         buf_oaf[0] = (1 << 7) | (PROTOCOL_STP << 4) | 0x1;
 713         buf_oaf[1] = dev->linkrate & 0xf;
 714         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 715         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 716
 717         /* fill in PRD (scatter/gather) table, if any */
 718         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 719 #ifndef DISABLE_HOTPLUG_DMA_FIX
 720         if (task->data_dir == DMA_FROM_DEVICE)
 721                 MVS_CHIP_DISP->dma_fix(mvi->bulk_buffer_dma,
 722                                 TRASH_BUCKET_SIZE, tei->n_elem, buf_prd);
 723 #endif
 724         return 0;
 725 }
 726
 727 static int mvs_task_prep_ssp(struct mvs_info *mvi,
 728                              struct mvs_task_exec_info *tei, int is_tmf,
 729                              struct mvs_tmf_task *tmf)
 730 {
 731         struct sas_task *task = tei->task;
 732         struct mvs_cmd_hdr *hdr = tei->hdr;
 733         struct mvs_port *port = tei->port;
 734         struct domain_device *dev = task->dev;
 735         struct mvs_device *mvi_dev =
 736                 (struct mvs_device *)dev->lldd_dev;
 737         struct asd_sas_port *sas_port = dev->port;
 738         struct mvs_slot_info *slot;
 739         void *buf_prd;
 740         struct ssp_frame_hdr *ssp_hdr;
 741         void *buf_tmp;
 742         u8 *buf_cmd, *buf_oaf, fburst = 0;
 743         dma_addr_t buf_tmp_dma;
 744         u32 flags;
 745         u32 resp_len, req_len, i, tag = tei->tag;
 746         const u32 max_resp_len = SB_RFB_MAX;
 747         u32 phy_mask;
 748
 749         slot = &mvi->slot_info[tag];
 750
 751         phy_mask = ((port->wide_port_phymap) ? port->wide_port_phymap :
 752                 sas_port->phy_mask) & TXQ_PHY_MASK;
 753
 754         slot->tx = mvi->tx_prod;
 755         mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag |
 756                                 (TXQ_CMD_SSP << TXQ_CMD_SHIFT) |
 757                                 (phy_mask << TXQ_PHY_SHIFT));
 758
 759         flags = MCH_RETRY;
 760         if (task->ssp_task.enable_first_burst) {
 761                 flags |= MCH_FBURST;
 762                 fburst = (1 << 7);
 763         }
 764         hdr->flags = cpu_to_le32(flags |
 765                                  (tei->n_elem << MCH_PRD_LEN_SHIFT) |
 766                                  (MCH_SSP_FR_CMD << MCH_SSP_FR_TYPE_SHIFT));
 767         hdr->tags = cpu_to_le32(tag);
 768         hdr->data_len = cpu_to_le32(task->total_xfer_len);
 769
 770         /*
 771          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 772          */
 773
 774         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ************** */
 775         buf_cmd = buf_tmp = slot->buf;
 776         buf_tmp_dma = slot->buf_dma;
 777
 778         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 779
 780         buf_tmp += MVS_SSP_CMD_SZ;
 781         buf_tmp_dma += MVS_SSP_CMD_SZ;
 782 #if _MV_DUMP
 783         slot->cmd_size = MVS_SSP_CMD_SZ;
 784 #endif
 785
 786         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 787         buf_oaf = buf_tmp;
 788         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 789
 790         buf_tmp += MVS_OAF_SZ;
 791         buf_tmp_dma += MVS_OAF_SZ;
 792
 793         /* region 3: PRD table ********************************************* */
 794         buf_prd = buf_tmp;
 795         if (tei->n_elem)
 796                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 797         else
 798                 hdr->prd_tbl = 0;
 799
 800         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 801         buf_tmp += i;
 802         buf_tmp_dma += i;
 803
 804         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 805         slot->response = buf_tmp;
 806         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 807         if (mvi->flags & MVF_FLAG_SOC)
 808                 hdr->reserved[0] = 0;
 809
 810         resp_len = MVS_SLOT_BUF_SZ - MVS_SSP_CMD_SZ - MVS_OAF_SZ -
 811             sizeof(struct mvs_err_info) - i;
 812         resp_len = min(resp_len, max_resp_len);
 813
 814         req_len = sizeof(struct ssp_frame_hdr) + 28;
 815
 816         /* request, response lengths */
 817         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 818
 819         /* generate open address frame hdr (first 12 bytes) */
 820         /* initiator, SSP, ftype 1h */
 821         buf_oaf[0] = (1 << 7) | (PROTOCOL_SSP << 4) | 0x1;
 822         buf_oaf[1] = dev->linkrate & 0xf;
 823         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 824         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 825
 826         /* fill in SSP frame header (Command Table.SSP frame header) */
 827         ssp_hdr = (struct ssp_frame_hdr *)buf_cmd;
 828
 829         if (is_tmf)
 830                 ssp_hdr->frame_type = SSP_TASK;
 831         else
 832                 ssp_hdr->frame_type = SSP_COMMAND;
 833
 834         memcpy(ssp_hdr->hashed_dest_addr, dev->hashed_sas_addr,
 835                HASHED_SAS_ADDR_SIZE);
 836         memcpy(ssp_hdr->hashed_src_addr,
 837                dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
 838         ssp_hdr->tag = cpu_to_be16(tag);
 839
 840         /* fill in IU for TASK and Command Frame */
 841         buf_cmd += sizeof(*ssp_hdr);
 842         memcpy(buf_cmd, &task->ssp_task.LUN, 8);
 843
 844         if (ssp_hdr->frame_type != SSP_TASK) {
 845                 buf_cmd[9] = fburst | task->ssp_task.task_attr |
 846                                 (task->ssp_task.task_prio << 3);
 847                 memcpy(buf_cmd + 12, &task->ssp_task.cdb, 16);
 848         } else{
 849                 buf_cmd[10] = tmf->tmf;
 850                 switch (tmf->tmf) {
 851                 case TMF_ABORT_TASK:
 852                 case TMF_QUERY_TASK:
 853                         buf_cmd[12] =
 854                                 (tmf->tag_of_task_to_be_managed >> 8) & 0xff;
 855                         buf_cmd[13] =
 856                                 tmf->tag_of_task_to_be_managed & 0xff;
 857                         break;
 858                 default:
 859                         break;
 860                 }
 861         }
 862         /* fill in PRD (scatter/gather) table, if any */
 863         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 864         return 0;
 865 }
 866
 867 #define DEV_IS_GONE(mvi_dev)    ((!mvi_dev || (mvi_dev->dev_type == NO_DEVICE)))
 868 static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags,
 869                                 struct completion *completion, int lock,
 870                                 int is_tmf, struct mvs_tmf_task *tmf)
 871 {
 872         struct domain_device *dev = task->dev;
 873         struct mvs_info *mvi;
 874         struct mvs_device *mvi_dev;
 875         struct mvs_task_exec_info tei;
 876         struct sas_task *t = task;
 877         struct mvs_slot_info *slot;
 878         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 879         u32 n = num, pass = 0;
 880         unsigned long flags = 0;
 881
 882         if (!dev->port) {
 883                 struct task_status_struct *tsm = &t->task_status;
 884
 885                 tsm->resp = SAS_TASK_UNDELIVERED;
 886                 tsm->stat = SAS_PHY_DOWN;
 887                 t->task_done(t);
 888                 return 0;
 889         }
 890
 891         mvi = mvs_find_dev_mvi(task->dev);
 892
 893         if (lock)
 894                 spin_lock_irqsave(&mvi->lock, flags);
 895         do {
 896                 dev = t->dev;
 897                 mvi_dev = (struct mvs_device *)dev->lldd_dev;
 898                 if (DEV_IS_GONE(mvi_dev)) {
 899                         if (mvi_dev)
 900                                 mv_dprintk("device %d not ready.\n",
 901                                         mvi_dev->device_id);
 902                         else
 903                                 mv_dprintk("device %016llx not ready.\n",
 904                                         SAS_ADDR(dev->sas_addr));
 905
 906                         rc = SAS_PHY_DOWN;
 907                         goto out_done;
 908                 }
 909
 910                 if (dev->port->id >= mvi->chip->n_phy)
 911                         tei.port = &mvi->port[dev->port->id - mvi->chip->n_phy];
 912                 else
 913                         tei.port = &mvi->port[dev->port->id];
 914
 915                 if (!tei.port->port_attached) {
 916                         if (sas_protocol_ata(t->task_proto)) {
 917                                 mv_dprintk("port %d does not"
 918                                         "attached device.\n", dev->port->id);
 919                                 rc = SAS_PHY_DOWN;
 920                                 goto out_done;
 921                         } else {
 922                                 struct task_status_struct *ts = &t->task_status;
 923                                 ts->resp = SAS_TASK_UNDELIVERED;
 924                                 ts->stat = SAS_PHY_DOWN;
 925                                 t->task_done(t);
 926                                 if (n > 1)
 927                                         t = list_entry(t->list.next,
 928                                                         struct sas_task, list);
 929                                 continue;
 930                         }
 931                 }
 932
 933                 if (!sas_protocol_ata(t->task_proto)) {
 934                         if (t->num_scatter) {
 935                                 n_elem = dma_map_sg(mvi->dev,
 936                                                     t->scatter,
 937                                                     t->num_scatter,
 938                                                     t->data_dir);
 939                                 if (!n_elem) {
 940                                         rc = -ENOMEM;
 941                                         goto err_out;
 942                                 }
 943                         }
 944                 } else {
 945                         n_elem = t->num_scatter;
 946                 }
 947
 948                 rc = mvs_tag_alloc(mvi, &tag);
 949                 if (rc)
 950                         goto err_out;
 951
 952                 slot = &mvi->slot_info[tag];
 953
 954
 955                 t->lldd_task = NULL;
 956                 slot->n_elem = n_elem;
 957                 slot->slot_tag = tag;
 958                 memset(slot->buf, 0, MVS_SLOT_BUF_SZ);
 959
 960                 tei.task = t;
 961                 tei.hdr = &mvi->slot[tag];
 962                 tei.tag = tag;
 963                 tei.n_elem = n_elem;
 964                 switch (t->task_proto) {
 965                 case SAS_PROTOCOL_SMP:
 966                         rc = mvs_task_prep_smp(mvi, &tei);
 967                         break;
 968                 case SAS_PROTOCOL_SSP:
 969                         rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf);
 970                         break;
 971                 case SAS_PROTOCOL_SATA:
 972                 case SAS_PROTOCOL_STP:
 973                 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 974                         rc = mvs_task_prep_ata(mvi, &tei);
 975                         break;
 976                 default:
 977                         dev_printk(KERN_ERR, mvi->dev,
 978                                 "unknown sas_task proto: 0x%x\n",
 979                                 t->task_proto);
 980                         rc = -EINVAL;
 981                         break;
 982                 }
 983
 984                 if (rc) {
 985                         mv_dprintk("rc is %x\n", rc);
 986                         goto err_out_tag;
 987                 }
 988                 slot->task = t;
 989                 slot->port = tei.port;
 990                 t->lldd_task = (void *) slot;
 991                 list_add_tail(&slot->entry, &tei.port->list);
 992                 /* TODO: select normal or high priority */
 993                 spin_lock(&t->task_state_lock);
 994                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 995                 spin_unlock(&t->task_state_lock);
 996
 997                 mvs_hba_memory_dump(mvi, tag, t->task_proto);
 998                 mvi_dev->runing_req++;
 999                 ++pass;
1000                 mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
1001                 if (n > 1)
1002                         t = list_entry(t->list.next, struct sas_task, list);
1003         } while (--n);
1004         rc = 0;
1005         goto out_done;
1006
1007 err_out_tag:
1008         mvs_tag_free(mvi, tag);
1009 err_out:
1010
1011         dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
1012         if (!sas_protocol_ata(t->task_proto))
1013                 if (n_elem)
1014                         dma_unmap_sg(mvi->dev, t->scatter, n_elem,
1015                                      t->data_dir);
1016 out_done:
1017         if (likely(pass)) {
1018                 MVS_CHIP_DISP->start_delivery(mvi,
1019                         (mvi->tx_prod - 1) & (MVS_CHIP_SLOT_SZ - 1));
1020         }
1021         if (lock)
1022                 spin_unlock_irqrestore(&mvi->lock, flags);
1023         return rc;
1024 }
1025
1026 int mvs_queue_command(struct sas_task *task, const int num,
1027                         gfp_t gfp_flags)
1028 {
1029         return mvs_task_exec(task, num, gfp_flags, NULL, 1, 0, NULL);
1030 }
1031
1032 static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc)
1033 {
1034         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1035         mvs_tag_clear(mvi, slot_idx);
1036 }
1037
1038 static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task,
1039                           struct mvs_slot_info *slot, u32 slot_idx)
1040 {
1041         if (!slot->task)
1042                 return;
1043         if (!sas_protocol_ata(task->task_proto))
1044                 if (slot->n_elem)
1045                         dma_unmap_sg(mvi->dev, task->scatter,
1046                                      slot->n_elem, task->data_dir);
1047
1048         switch (task->task_proto) {
1049         case SAS_PROTOCOL_SMP:
1050                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_resp, 1,
1051                              PCI_DMA_FROMDEVICE);
1052                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_req, 1,
1053                              PCI_DMA_TODEVICE);
1054                 break;
1055
1056         case SAS_PROTOCOL_SATA:
1057         case SAS_PROTOCOL_STP:
1058         case SAS_PROTOCOL_SSP:
1059         default:
1060                 /* do nothing */
1061                 break;
1062         }
1063         list_del_init(&slot->entry);
1064         task->lldd_task = NULL;
1065         slot->task = NULL;
1066         slot->port = NULL;
1067         slot->slot_tag = 0xFFFFFFFF;
1068         mvs_slot_free(mvi, slot_idx);
1069 }
1070
1071 static void mvs_update_wideport(struct mvs_info *mvi, int i)
1072 {
1073         struct mvs_phy *phy = &mvi->phy[i];
1074         struct mvs_port *port = phy->port;
1075         int j, no;
1076
1077         for_each_phy(port->wide_port_phymap, j, no) {
1078                 if (j & 1) {
1079                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
1080                                                 PHYR_WIDE_PORT);
1081                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
1082                                                 port->wide_port_phymap);
1083                 } else {
1084                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
1085                                                 PHYR_WIDE_PORT);
1086                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
1087                                                 0);
1088                 }
1089         }
1090 }
1091
1092 static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i)
1093 {
1094         u32 tmp;
1095         struct mvs_phy *phy = &mvi->phy[i];
1096         struct mvs_port *port = phy->port;
1097
1098         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, i);
1099         if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) {
1100                 if (!port)
1101                         phy->phy_attached = 1;
1102                 return tmp;
1103         }
1104
1105         if (port) {
1106                 if (phy->phy_type & PORT_TYPE_SAS) {
1107                         port->wide_port_phymap &= ~(1U << i);
1108                         if (!port->wide_port_phymap)
1109                                 port->port_attached = 0;
1110                         mvs_update_wideport(mvi, i);
1111                 } else if (phy->phy_type & PORT_TYPE_SATA)
1112                         port->port_attached = 0;
1113                 phy->port = NULL;
1114                 phy->phy_attached = 0;
1115                 phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);
1116         }
1117         return 0;
1118 }
1119
1120 static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf)
1121 {
1122         u32 *s = (u32 *) buf;
1123
1124         if (!s)
1125                 return NULL;
1126
1127         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG3);
1128         s[3] = MVS_CHIP_DISP->read_port_cfg_data(mvi, i);
1129
1130         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG2);
1131         s[2] = MVS_CHIP_DISP->read_port_cfg_data(mvi, i);
1132
1133         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG1);
1134         s[1] = MVS_CHIP_DISP->read_port_cfg_data(mvi, i);
1135
1136         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG0);
1137         s[0] = MVS_CHIP_DISP->read_port_cfg_data(mvi, i);
1138
1139         /* Workaround: take some ATAPI devices for ATA */
1140         if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01))
1141                 s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10);
1142
1143         return (void *)s;
1144 }
1145
1146 static u32 mvs_is_sig_fis_received(u32 irq_status)
1147 {
1148         return irq_status & PHYEV_SIG_FIS;
1149 }
1150
1151 void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st)
1152 {
1153         struct mvs_phy *phy = &mvi->phy[i];
1154         struct sas_identify_frame *id;
1155
1156         id = (struct sas_identify_frame *)phy->frame_rcvd;
1157
1158         if (get_st) {
1159                 phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, i);
1160                 phy->phy_status = mvs_is_phy_ready(mvi, i);
1161         }
1162
1163         if (phy->phy_status) {
1164                 int oob_done = 0;
1165                 struct asd_sas_phy *sas_phy = &mvi->phy[i].sas_phy;
1166
1167                 oob_done = MVS_CHIP_DISP->oob_done(mvi, i);
1168
1169                 MVS_CHIP_DISP->fix_phy_info(mvi, i, id);
1170                 if (phy->phy_type & PORT_TYPE_SATA) {
1171                         phy->identify.target_port_protocols = SAS_PROTOCOL_STP;
1172                         if (mvs_is_sig_fis_received(phy->irq_status)) {
1173                                 phy->phy_attached = 1;
1174                                 phy->att_dev_sas_addr =
1175                                         i + mvi->id * mvi->chip->n_phy;
1176                                 if (oob_done)
1177                                         sas_phy->oob_mode = SATA_OOB_MODE;
1178                                 phy->frame_rcvd_size =
1179                                     sizeof(struct dev_to_host_fis);
1180                                 mvs_get_d2h_reg(mvi, i, (void *)id);
1181                         } else {
1182                                 u32 tmp;
1183                                 dev_printk(KERN_DEBUG, mvi->dev,
1184                                         "Phy%d : No sig fis\n", i);
1185                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, i);
1186                                 MVS_CHIP_DISP->write_port_irq_mask(mvi, i,
1187                                                 tmp | PHYEV_SIG_FIS);
1188                                 phy->phy_attached = 0;
1189                                 phy->phy_type &= ~PORT_TYPE_SATA;
1190                                 MVS_CHIP_DISP->phy_reset(mvi, i, 0);
1191                                 goto out_done;
1192                         }
1193                 }               else if (phy->phy_type & PORT_TYPE_SAS
1194                         || phy->att_dev_info & PORT_SSP_INIT_MASK) {
1195                         phy->phy_attached = 1;
1196                         phy->identify.device_type =
1197                                 phy->att_dev_info & PORT_DEV_TYPE_MASK;
1198
1199                         if (phy->identify.device_type == SAS_END_DEV)
1200                                 phy->identify.target_port_protocols =
1201                                                         SAS_PROTOCOL_SSP;
1202                         else if (phy->identify.device_type != NO_DEVICE)
1203                                 phy->identify.target_port_protocols =
1204                                                         SAS_PROTOCOL_SMP;
1205                         if (oob_done)
1206                                 sas_phy->oob_mode = SAS_OOB_MODE;
1207                         phy->frame_rcvd_size =
1208                             sizeof(struct sas_identify_frame);
1209                 }
1210                 memcpy(sas_phy->attached_sas_addr,
1211                         &phy->att_dev_sas_addr, SAS_ADDR_SIZE);
1212
1213                 if (MVS_CHIP_DISP->phy_work_around)
1214                         MVS_CHIP_DISP->phy_work_around(mvi, i);
1215         }
1216         mv_dprintk("port %d attach dev info is %x\n",
1217                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_info);
1218         mv_dprintk("port %d attach sas addr is %llx\n",
1219                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_sas_addr);
1220 out_done:
1221         if (get_st)
1222                 MVS_CHIP_DISP->write_port_irq_stat(mvi, i, phy->irq_status);
1223 }
1224
1225 static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
1226 {
1227         struct sas_ha_struct *sas_ha = sas_phy->ha;
1228         struct mvs_info *mvi = NULL; int i = 0, hi;
1229         struct mvs_phy *phy = sas_phy->lldd_phy;
1230         struct asd_sas_port *sas_port = sas_phy->port;
1231         struct mvs_port *port;
1232         unsigned long flags = 0;
1233         if (!sas_port)
1234                 return;
1235
1236         while (sas_ha->sas_phy[i]) {
1237                 if (sas_ha->sas_phy[i] == sas_phy)
1238                         break;
1239                 i++;
1240         }
1241         hi = i/((struct mvs_prv_info *)sas_ha->lldd_ha)->n_phy;
1242         mvi = ((struct mvs_prv_info *)sas_ha->lldd_ha)->mvi[hi];
1243         if (sas_port->id >= mvi->chip->n_phy)
1244                 port = &mvi->port[sas_port->id - mvi->chip->n_phy];
1245         else
1246                 port = &mvi->port[sas_port->id];
1247         if (lock)
1248                 spin_lock_irqsave(&mvi->lock, flags);
1249         port->port_attached = 1;
1250         phy->port = port;
1251         if (phy->phy_type & PORT_TYPE_SAS) {
1252                 port->wide_port_phymap = sas_port->phy_mask;
1253                 mv_printk("set wide port phy map %x\n", sas_port->phy_mask);
1254                 mvs_update_wideport(mvi, sas_phy->id);
1255         }
1256         if (lock)
1257                 spin_unlock_irqrestore(&mvi->lock, flags);
1258 }
1259
1260 static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock)
1261 {
1262         /*Nothing*/
1263 }
1264
1265
1266 void mvs_port_formed(struct asd_sas_phy *sas_phy)
1267 {
1268         mvs_port_notify_formed(sas_phy, 1);
1269 }
1270
1271 void mvs_port_deformed(struct asd_sas_phy *sas_phy)
1272 {
1273         mvs_port_notify_deformed(sas_phy, 1);
1274 }
1275
1276 struct mvs_device *mvs_alloc_dev(struct mvs_info *mvi)
1277 {
1278         u32 dev;
1279         for (dev = 0; dev < MVS_MAX_DEVICES; dev++) {
1280                 if (mvi->devices[dev].dev_type == NO_DEVICE) {
1281                         mvi->devices[dev].device_id = dev;
1282                         return &mvi->devices[dev];
1283                 }
1284         }
1285
1286         if (dev == MVS_MAX_DEVICES)
1287                 mv_printk("max support %d devices, ignore ..\n",
1288                         MVS_MAX_DEVICES);
1289
1290         return NULL;
1291 }
1292
1293 void mvs_free_dev(struct mvs_device *mvi_dev)
1294 {
1295         u32 id = mvi_dev->device_id;
1296         memset(mvi_dev, 0, sizeof(*mvi_dev));
1297         mvi_dev->device_id = id;
1298         mvi_dev->dev_type = NO_DEVICE;
1299         mvi_dev->dev_status = MVS_DEV_NORMAL;
1300         mvi_dev->taskfileset = MVS_ID_NOT_MAPPED;
1301 }
1302
1303 int mvs_dev_found_notify(struct domain_device *dev, int lock)
1304 {
1305         unsigned long flags = 0;
1306         int res = 0;
1307         struct mvs_info *mvi = NULL;
1308         struct domain_device *parent_dev = dev->parent;
1309         struct mvs_device *mvi_device;
1310
1311         mvi = mvs_find_dev_mvi(dev);
1312
1313         if (lock)
1314                 spin_lock_irqsave(&mvi->lock, flags);
1315
1316         mvi_device = mvs_alloc_dev(mvi);
1317         if (!mvi_device) {
1318                 res = -1;
1319                 goto found_out;
1320         }
1321         dev->lldd_dev = (void *)mvi_device;
1322         mvi_device->dev_type = dev->dev_type;
1323
1324         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
1325                 int phy_id;
1326                 u8 phy_num = parent_dev->ex_dev.num_phys;
1327                 struct ex_phy *phy;
1328                 for (phy_id = 0; phy_id < phy_num; phy_id++) {
1329                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
1330                         if (SAS_ADDR(phy->attached_sas_addr) ==
1331                                 SAS_ADDR(dev->sas_addr)) {
1332                                 mvi_device->attached_phy = phy_id;
1333                                 break;
1334                         }
1335                 }
1336
1337                 if (phy_id == phy_num) {
1338                         mv_printk("Error: no attached dev:%016llx"
1339                                 "at ex:%016llx.\n",
1340                                 SAS_ADDR(dev->sas_addr),
1341                                 SAS_ADDR(parent_dev->sas_addr));
1342                         res = -1;
1343                 }
1344         }
1345
1346 found_out:
1347         if (lock)
1348                 spin_unlock_irqrestore(&mvi->lock, flags);
1349         return res;
1350 }
1351
1352 int mvs_dev_found(struct domain_device *dev)
1353 {
1354         return mvs_dev_found_notify(dev, 1);
1355 }
1356
1357 void mvs_dev_gone_notify(struct domain_device *dev, int lock)
1358 {
1359         unsigned long flags = 0;
1360         struct mvs_info *mvi;
1361         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1362
1363         mvi = mvs_find_dev_mvi(dev);
1364
1365         if (lock)
1366                 spin_lock_irqsave(&mvi->lock, flags);
1367
1368         if (mvi_dev) {
1369                 mv_dprintk("found dev[%d:%x] is gone.\n",
1370                         mvi_dev->device_id, mvi_dev->dev_type);
1371                 mvs_free_reg_set(mvi, mvi_dev);
1372                 mvs_free_dev(mvi_dev);
1373         } else {
1374                 mv_dprintk("found dev has gone.\n");
1375         }
1376         dev->lldd_dev = NULL;
1377
1378         if (lock)
1379                 spin_unlock_irqrestore(&mvi->lock, flags);
1380 }
1381
1382
1383 void mvs_dev_gone(struct domain_device *dev)
1384 {
1385         mvs_dev_gone_notify(dev, 1);
1386 }
1387
1388 static  struct sas_task *mvs_alloc_task(void)
1389 {
1390         struct sas_task *task = kzalloc(sizeof(struct sas_task), GFP_KERNEL);
1391
1392         if (task) {
1393                 INIT_LIST_HEAD(&task->list);
1394                 spin_lock_init(&task->task_state_lock);
1395                 task->task_state_flags = SAS_TASK_STATE_PENDING;
1396                 init_timer(&task->timer);
1397                 init_completion(&task->completion);
1398         }
1399         return task;
1400 }
1401
1402 static  void mvs_free_task(struct sas_task *task)
1403 {
1404         if (task) {
1405                 BUG_ON(!list_empty(&task->list));
1406                 kfree(task);
1407         }
1408 }
1409
1410 static void mvs_task_done(struct sas_task *task)
1411 {
1412         if (!del_timer(&task->timer))
1413                 return;
1414         complete(&task->completion);
1415 }
1416
1417 static void mvs_tmf_timedout(unsigned long data)
1418 {
1419         struct sas_task *task = (struct sas_task *)data;
1420
1421         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1422         complete(&task->completion);
1423 }
1424
1425 /* XXX */
1426 #define MVS_TASK_TIMEOUT 20
1427 static int mvs_exec_internal_tmf_task(struct domain_device *dev,
1428                         void *parameter, u32 para_len, struct mvs_tmf_task *tmf)
1429 {
1430         int res, retry;
1431         struct sas_task *task = NULL;
1432
1433         for (retry = 0; retry < 3; retry++) {
1434                 task = mvs_alloc_task();
1435                 if (!task)
1436                         return -ENOMEM;
1437
1438                 task->dev = dev;
1439                 task->task_proto = dev->tproto;
1440
1441                 memcpy(&task->ssp_task, parameter, para_len);
1442                 task->task_done = mvs_task_done;
1443
1444                 task->timer.data = (unsigned long) task;
1445                 task->timer.function = mvs_tmf_timedout;
1446                 task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ;
1447                 add_timer(&task->timer);
1448
1449                 res = mvs_task_exec(task, 1, GFP_KERNEL, NULL, 0, 1, tmf);
1450
1451                 if (res) {
1452                         del_timer(&task->timer);
1453                         mv_printk("executing internel task failed:%d\n", res);
1454                         goto ex_err;
1455                 }
1456
1457                 wait_for_completion(&task->completion);
1458                 res = -TMF_RESP_FUNC_FAILED;
1459                 /* Even TMF timed out, return direct. */
1460                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1461                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1462                                 mv_printk("TMF task[%x] timeout.\n", tmf->tmf);
1463                                 goto ex_err;
1464                         }
1465                 }
1466
1467                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1468                     task->task_status.stat == SAM_GOOD) {
1469                         res = TMF_RESP_FUNC_COMPLETE;
1470                         break;
1471                 }
1472
1473                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1474                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1475                         /* no error, but return the number of bytes of
1476                          * underrun */
1477                         res = task->task_status.residual;
1478                         break;
1479                 }
1480
1481                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1482                       task->task_status.stat == SAS_DATA_OVERRUN) {
1483                         mv_dprintk("blocked task error.\n");
1484                         res = -EMSGSIZE;
1485                         break;
1486                 } else {
1487                         mv_dprintk(" task to dev %016llx response: 0x%x "
1488                                     "status 0x%x\n",
1489                                     SAS_ADDR(dev->sas_addr),
1490                                     task->task_status.resp,
1491                                     task->task_status.stat);
1492                         mvs_free_task(task);
1493                         task = NULL;
1494
1495                 }
1496         }
1497 ex_err:
1498         BUG_ON(retry == 3 && task != NULL);
1499         if (task != NULL)
1500                 mvs_free_task(task);
1501         return res;
1502 }
1503
1504 static int mvs_debug_issue_ssp_tmf(struct domain_device *dev,
1505                                 u8 *lun, struct mvs_tmf_task *tmf)
1506 {
1507         struct sas_ssp_task ssp_task;
1508         DECLARE_COMPLETION_ONSTACK(completion);
1509         if (!(dev->tproto & SAS_PROTOCOL_SSP))
1510                 return TMF_RESP_FUNC_ESUPP;
1511
1512         strncpy((u8 *)&ssp_task.LUN, lun, 8);
1513
1514         return mvs_exec_internal_tmf_task(dev, &ssp_task,
1515                                 sizeof(ssp_task), tmf);
1516 }
1517
1518
1519 /*  Standard mandates link reset for ATA  (type 0)
1520     and hard reset for SSP (type 1) , only for RECOVERY */
1521 static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
1522 {
1523         int rc;
1524         struct sas_phy *phy = sas_find_local_phy(dev);
1525         int reset_type = (dev->dev_type == SATA_DEV ||
1526                         (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1527         rc = sas_phy_reset(phy, reset_type);
1528         msleep(2000);
1529         return rc;
1530 }
1531
1532 /* mandatory SAM-3 */
1533 int mvs_lu_reset(struct domain_device *dev, u8 *lun)
1534 {
1535         unsigned long flags;
1536         int i, phyno[WIDE_PORT_MAX_PHY], num , rc = TMF_RESP_FUNC_FAILED;
1537         struct mvs_tmf_task tmf_task;
1538         struct mvs_info *mvi = mvs_find_dev_mvi(dev);
1539         struct mvs_device * mvi_dev = (struct mvs_device *)dev->lldd_dev;
1540
1541         tmf_task.tmf = TMF_LU_RESET;
1542         mvi_dev->dev_status = MVS_DEV_EH;
1543         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1544         if (rc == TMF_RESP_FUNC_COMPLETE) {
1545                 num = mvs_find_dev_phyno(dev, phyno);
1546                 spin_lock_irqsave(&mvi->lock, flags);
1547                 for (i = 0; i < num; i++)
1548                         mvs_release_task(mvi, phyno[i], dev);
1549                 spin_unlock_irqrestore(&mvi->lock, flags);
1550         }
1551         /* If failed, fall-through I_T_Nexus reset */
1552         mv_printk("%s for device[%x]:rc= %d\n", __func__,
1553                         mvi_dev->device_id, rc);
1554         return rc;
1555 }
1556
1557 int mvs_I_T_nexus_reset(struct domain_device *dev)
1558 {
1559         unsigned long flags;
1560         int i, phyno[WIDE_PORT_MAX_PHY], num , rc = TMF_RESP_FUNC_FAILED;
1561         struct mvs_info *mvi = mvs_find_dev_mvi(dev);
1562         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1563
1564         if (mvi_dev->dev_status != MVS_DEV_EH)
1565                 return TMF_RESP_FUNC_COMPLETE;
1566         rc = mvs_debug_I_T_nexus_reset(dev);
1567         mv_printk("%s for device[%x]:rc= %d\n",
1568                 __func__, mvi_dev->device_id, rc);
1569
1570         /* housekeeper */
1571         num = mvs_find_dev_phyno(dev, phyno);
1572         spin_lock_irqsave(&mvi->lock, flags);
1573         for (i = 0; i < num; i++)
1574                 mvs_release_task(mvi, phyno[i], dev);
1575         spin_unlock_irqrestore(&mvi->lock, flags);
1576
1577         return rc;
1578 }
1579 /* optional SAM-3 */
1580 int mvs_query_task(struct sas_task *task)
1581 {
1582         u32 tag;
1583         struct scsi_lun lun;
1584         struct mvs_tmf_task tmf_task;
1585         int rc = TMF_RESP_FUNC_FAILED;
1586
1587         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1588                 struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1589                 struct domain_device *dev = task->dev;
1590                 struct mvs_info *mvi = mvs_find_dev_mvi(dev);
1591
1592                 int_to_scsilun(cmnd->device->lun, &lun);
1593                 rc = mvs_find_tag(mvi, task, &tag);
1594                 if (rc == 0) {
1595                         rc = TMF_RESP_FUNC_FAILED;
1596                         return rc;
1597                 }
1598
1599                 tmf_task.tmf = TMF_QUERY_TASK;
1600                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1601
1602                 rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1603                 switch (rc) {
1604                 /* The task is still in Lun, release it then */
1605                 case TMF_RESP_FUNC_SUCC:
1606                 /* The task is not in Lun or failed, reset the phy */
1607                 case TMF_RESP_FUNC_FAILED:
1608                 case TMF_RESP_FUNC_COMPLETE:
1609                         break;
1610                 }
1611         }
1612         mv_printk("%s:rc= %d\n", __func__, rc);
1613         return rc;
1614 }
1615
1616 /*  mandatory SAM-3, still need free task/slot info */
1617 int mvs_abort_task(struct sas_task *task)
1618 {
1619         struct scsi_lun lun;
1620         struct mvs_tmf_task tmf_task;
1621         struct domain_device *dev = task->dev;
1622         struct mvs_info *mvi = mvs_find_dev_mvi(dev);
1623         int rc = TMF_RESP_FUNC_FAILED;
1624         unsigned long flags;
1625         u32 tag;
1626         if (mvi->exp_req)
1627                 mvi->exp_req--;
1628         spin_lock_irqsave(&task->task_state_lock, flags);
1629         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1630                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1631                 rc = TMF_RESP_FUNC_COMPLETE;
1632                 goto out;
1633         }
1634         spin_unlock_irqrestore(&task->task_state_lock, flags);
1635         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1636                 struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1637
1638                 int_to_scsilun(cmnd->device->lun, &lun);
1639                 rc = mvs_find_tag(mvi, task, &tag);
1640                 if (rc == 0) {
1641                         mv_printk("No such tag in %s\n", __func__);
1642                         rc = TMF_RESP_FUNC_FAILED;
1643                         return rc;
1644                 }
1645
1646                 tmf_task.tmf = TMF_ABORT_TASK;
1647                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1648
1649                 rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1650
1651                 /* if successful, clear the task and callback forwards.*/
1652                 if (rc == TMF_RESP_FUNC_COMPLETE) {
1653                         u32 slot_no;
1654                         struct mvs_slot_info *slot;
1655                         struct mvs_info *mvi = mvs_find_dev_mvi(dev);
1656
1657                         if (task->lldd_task) {
1658                                 slot = (struct mvs_slot_info *)task->lldd_task;
1659                                 slot_no = (u32) (slot - mvi->slot_info);
1660                                 mvs_slot_complete(mvi, slot_no, 1);
1661                         }
1662                 }
1663         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1664                 task->task_proto & SAS_PROTOCOL_STP) {
1665                 /* to do free register_set */
1666         } else {
1667                 /* SMP */
1668
1669         }
1670 out:
1671         if (rc != TMF_RESP_FUNC_COMPLETE)
1672                 mv_printk("%s:rc= %d\n", __func__, rc);
1673         return rc;
1674 }
1675
1676 int mvs_abort_task_set(struct domain_device *dev, u8 *lun)
1677 {
1678         int rc = TMF_RESP_FUNC_FAILED;
1679         struct mvs_tmf_task tmf_task;
1680
1681         tmf_task.tmf = TMF_ABORT_TASK_SET;
1682         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1683
1684         return rc;
1685 }
1686
1687 int mvs_clear_aca(struct domain_device *dev, u8 *lun)
1688 {
1689         int rc = TMF_RESP_FUNC_FAILED;
1690         struct mvs_tmf_task tmf_task;
1691
1692         tmf_task.tmf = TMF_CLEAR_ACA;
1693         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1694
1695         return rc;
1696 }
1697
1698 int mvs_clear_task_set(struct domain_device *dev, u8 *lun)
1699 {
1700         int rc = TMF_RESP_FUNC_FAILED;
1701         struct mvs_tmf_task tmf_task;
1702
1703         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1704         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1705
1706         return rc;
1707 }
1708
1709 static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
1710                         u32 slot_idx, int err)
1711 {
1712         struct mvs_device *mvi_dev = (struct mvs_device *)task->dev->lldd_dev;
1713         struct task_status_struct *tstat = &task->task_status;
1714         struct ata_task_resp *resp = (struct ata_task_resp *)tstat->buf;
1715         int stat = SAM_GOOD;
1716
1717
1718         resp->frame_len = sizeof(struct dev_to_host_fis);
1719         memcpy(&resp->ending_fis[0],
1720                SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset),
1721                sizeof(struct dev_to_host_fis));
1722         tstat->buf_valid_size = sizeof(*resp);
1723         if (unlikely(err))
1724                 stat = SAS_PROTO_RESPONSE;
1725         return stat;
1726 }
1727
1728 static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task,
1729                          u32 slot_idx)
1730 {
1731         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1732         int stat;
1733         u32 err_dw0 = le32_to_cpu(*(u32 *) (slot->response));
1734         u32 tfs = 0;
1735         enum mvs_port_type type = PORT_TYPE_SAS;
1736
1737         if (err_dw0 & CMD_ISS_STPD)
1738                 MVS_CHIP_DISP->issue_stop(mvi, type, tfs);
1739
1740         MVS_CHIP_DISP->command_active(mvi, slot_idx);
1741
1742         stat = SAM_CHECK_COND;
1743         switch (task->task_proto) {
1744         case SAS_PROTOCOL_SSP:
1745                 stat = SAS_ABORTED_TASK;
1746                 break;
1747         case SAS_PROTOCOL_SMP:
1748                 stat = SAM_CHECK_COND;
1749                 break;
1750
1751         case SAS_PROTOCOL_SATA:
1752         case SAS_PROTOCOL_STP:
1753         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
1754         {
1755                 if (err_dw0 == 0x80400002)
1756                         mv_printk("find reserved error, why?\n");
1757
1758                 task->ata_task.use_ncq = 0;
1759                 stat = SAS_PROTO_RESPONSE;
1760                 mvs_sata_done(mvi, task, slot_idx, 1);
1761
1762         }
1763                 break;
1764         default:
1765                 break;
1766         }
1767
1768         return stat;
1769 }
1770
1771 int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
1772 {
1773         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1774         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1775         struct sas_task *task = slot->task;
1776         struct mvs_device *mvi_dev = NULL;
1777         struct task_status_struct *tstat;
1778
1779         bool aborted;
1780         void *to;
1781         enum exec_status sts;
1782
1783         if (mvi->exp_req)
1784                 mvi->exp_req--;
1785         if (unlikely(!task || !task->lldd_task))
1786                 return -1;
1787
1788         tstat = &task->task_status;
1789         mvi_dev = (struct mvs_device *)task->dev->lldd_dev;
1790
1791         mvs_hba_cq_dump(mvi);
1792
1793         spin_lock(&task->task_state_lock);
1794         task->task_state_flags &=
1795                 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1796         task->task_state_flags |= SAS_TASK_STATE_DONE;
1797         /* race condition*/
1798         aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED;
1799         spin_unlock(&task->task_state_lock);
1800
1801         memset(tstat, 0, sizeof(*tstat));
1802         tstat->resp = SAS_TASK_COMPLETE;
1803
1804         if (unlikely(aborted)) {
1805                 tstat->stat = SAS_ABORTED_TASK;
1806                 if (mvi_dev)
1807                         mvi_dev->runing_req--;
1808                 if (sas_protocol_ata(task->task_proto))
1809                         mvs_free_reg_set(mvi, mvi_dev);
1810
1811                 mvs_slot_task_free(mvi, task, slot, slot_idx);
1812                 return -1;
1813         }
1814
1815         if (unlikely(!mvi_dev || !slot->port->port_attached || flags)) {
1816                 mv_dprintk("port has not device.\n");
1817                 tstat->stat = SAS_PHY_DOWN;
1818                 goto out;
1819         }
1820
1821         /*
1822         if (unlikely((rx_desc & RXQ_ERR) || (*(u64 *) slot->response))) {
1823                  mv_dprintk("Find device[%016llx] RXQ_ERR %X,
1824                  err info:%016llx\n",
1825                  SAS_ADDR(task->dev->sas_addr),
1826                  rx_desc, (u64)(*(u64 *) slot->response));
1827         }
1828         */
1829
1830         /* error info record present */
1831         if (unlikely((rx_desc & RXQ_ERR) && (*(u64 *) slot->response))) {
1832                 tstat->stat = mvs_slot_err(mvi, task, slot_idx);
1833                 goto out;
1834         }
1835
1836         switch (task->task_proto) {
1837         case SAS_PROTOCOL_SSP:
1838                 /* hw says status == 0, datapres == 0 */
1839                 if (rx_desc & RXQ_GOOD) {
1840                         tstat->stat = SAM_GOOD;
1841                         tstat->resp = SAS_TASK_COMPLETE;
1842                 }
1843                 /* response frame present */
1844                 else if (rx_desc & RXQ_RSP) {
1845                         struct ssp_response_iu *iu = slot->response +
1846                                                 sizeof(struct mvs_err_info);
1847                         sas_ssp_task_response(mvi->dev, task, iu);
1848                 } else
1849                         tstat->stat = SAM_CHECK_COND;
1850                 break;
1851
1852         case SAS_PROTOCOL_SMP: {
1853                         struct scatterlist *sg_resp = &task->smp_task.smp_resp;
1854                         tstat->stat = SAM_GOOD;
1855                         to = kmap_atomic(sg_page(sg_resp), KM_IRQ0);
1856                         memcpy(to + sg_resp->offset,
1857                                 slot->response + sizeof(struct mvs_err_info),
1858                                 sg_dma_len(sg_resp));
1859                         kunmap_atomic(to, KM_IRQ0);
1860                         break;
1861                 }
1862
1863         case SAS_PROTOCOL_SATA:
1864         case SAS_PROTOCOL_STP:
1865         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: {
1866                         tstat->stat = mvs_sata_done(mvi, task, slot_idx, 0);
1867                         break;
1868                 }
1869
1870         default:
1871                 tstat->stat = SAM_CHECK_COND;
1872                 break;
1873         }
1874
1875 out:
1876         if (mvi_dev)
1877                 mvi_dev->runing_req--;
1878         if (sas_protocol_ata(task->task_proto))
1879                 mvs_free_reg_set(mvi, mvi_dev);
1880
1881         mvs_slot_task_free(mvi, task, slot, slot_idx);
1882         sts = tstat->stat;
1883
1884         spin_unlock(&mvi->lock);
1885         if (task->task_done)
1886                 task->task_done(task);
1887         else
1888                 mv_dprintk("why has not task_done.\n");
1889         spin_lock(&mvi->lock);
1890
1891         return sts;
1892 }
1893
1894 void mvs_release_task(struct mvs_info *mvi,
1895                 int phy_no, struct domain_device *dev)
1896 {
1897         int i = 0; u32 slot_idx;
1898         struct mvs_phy *phy;
1899         struct mvs_port *port;
1900         struct mvs_slot_info *slot, *slot2;
1901
1902         phy = &mvi->phy[phy_no];
1903         port = phy->port;
1904         if (!port)
1905                 return;
1906
1907         list_for_each_entry_safe(slot, slot2, &port->list, entry) {
1908                 struct sas_task *task;
1909                 slot_idx = (u32) (slot - mvi->slot_info);
1910                 task = slot->task;
1911
1912                 if (dev && task->dev != dev)
1913                         continue;
1914
1915                 mv_printk("Release slot [%x] tag[%x], task [%p]:\n",
1916                         slot_idx, slot->slot_tag, task);
1917
1918                 if (task->task_proto & SAS_PROTOCOL_SSP) {
1919                         mv_printk("attached with SSP task CDB[");
1920                         for (i = 0; i < 16; i++)
1921                                 mv_printk(" %02x", task->ssp_task.cdb[i]);
1922                         mv_printk(" ]\n");
1923                 }
1924
1925                 mvs_slot_complete(mvi, slot_idx, 1);
1926         }
1927 }
1928
1929 static void mvs_phy_disconnected(struct mvs_phy *phy)
1930 {
1931         phy->phy_attached = 0;
1932         phy->att_dev_info = 0;
1933         phy->att_dev_sas_addr = 0;
1934 }
1935
1936 static void mvs_work_queue(struct work_struct *work)
1937 {
1938         struct delayed_work *dw = container_of(work, struct delayed_work, work);
1939         struct mvs_wq *mwq = container_of(dw, struct mvs_wq, work_q);
1940         struct mvs_info *mvi = mwq->mvi;
1941         unsigned long flags;
1942
1943         spin_lock_irqsave(&mvi->lock, flags);
1944         if (mwq->handler & PHY_PLUG_EVENT) {
1945                 u32 phy_no = (unsigned long) mwq->data;
1946                 struct sas_ha_struct *sas_ha = mvi->sas;
1947                 struct mvs_phy *phy = &mvi->phy[phy_no];
1948                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1949
1950                 if (phy->phy_event & PHY_PLUG_OUT) {
1951                         u32 tmp;
1952                         struct sas_identify_frame *id;
1953                         id = (struct sas_identify_frame *)phy->frame_rcvd;
1954                         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no);
1955                         phy->phy_event &= ~PHY_PLUG_OUT;
1956                         if (!(tmp & PHY_READY_MASK)) {
1957                                 sas_phy_disconnected(sas_phy);
1958                                 mvs_phy_disconnected(phy);
1959                                 sas_ha->notify_phy_event(sas_phy,
1960                                         PHYE_LOSS_OF_SIGNAL);
1961                                 mv_dprintk("phy%d Removed Device\n", phy_no);
1962                         } else {
1963                                 MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1964                                 mvs_update_phyinfo(mvi, phy_no, 1);
1965                                 mvs_bytes_dmaed(mvi, phy_no);
1966                                 mvs_port_notify_formed(sas_phy, 0);
1967                                 mv_dprintk("phy%d Attached Device\n", phy_no);
1968                         }
1969                 }
1970         }
1971         list_del(&mwq->entry);
1972         spin_unlock_irqrestore(&mvi->lock, flags);
1973         kfree(mwq);
1974 }
1975
1976 static int mvs_handle_event(struct mvs_info *mvi, void *data, int handler)
1977 {
1978         struct mvs_wq *mwq;
1979         int ret = 0;
1980
1981         mwq = kmalloc(sizeof(struct mvs_wq), GFP_ATOMIC);
1982         if (mwq) {
1983                 mwq->mvi = mvi;
1984                 mwq->data = data;
1985                 mwq->handler = handler;
1986                 MV_INIT_DELAYED_WORK(&mwq->work_q, mvs_work_queue, mwq);
1987                 list_add_tail(&mwq->entry, &mvi->wq_list);
1988                 schedule_delayed_work(&mwq->work_q, HZ * 2);
1989         } else
1990                 ret = -ENOMEM;
1991
1992         return ret;
1993 }
1994
1995 static void mvs_sig_time_out(unsigned long tphy)
1996 {
1997         struct mvs_phy *phy = (struct mvs_phy *)tphy;
1998         struct mvs_info *mvi = phy->mvi;
1999         u8 phy_no;
2000
2001         for (phy_no = 0; phy_no < mvi->chip->n_phy; phy_no++) {
2002                 if (&mvi->phy[phy_no] == phy) {
2003                         mv_dprintk("Get signature time out, reset phy %d\n",
2004                                 phy_no+mvi->id*mvi->chip->n_phy);
2005                         MVS_CHIP_DISP->phy_reset(mvi, phy_no, 1);
2006                 }
2007         }
2008 }
2009
2010 static void mvs_sig_remove_timer(struct mvs_phy *phy)
2011 {
2012         if (phy->timer.function)
2013                 del_timer(&phy->timer);
2014         phy->timer.function = NULL;
2015 }
2016
2017 void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
2018 {
2019         u32 tmp;
2020         struct sas_ha_struct *sas_ha = mvi->sas;
2021         struct mvs_phy *phy = &mvi->phy[phy_no];
2022         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2023
2024         phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, phy_no);
2025         mv_dprintk("port %d ctrl sts=0x%X.\n", phy_no+mvi->id*mvi->chip->n_phy,
2026                 MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no));
2027         mv_dprintk("Port %d irq sts = 0x%X\n", phy_no+mvi->id*mvi->chip->n_phy,
2028                 phy->irq_status);
2029
2030         /*
2031         * events is port event now ,
2032         * we need check the interrupt status which belongs to per port.
2033         */
2034
2035         if (phy->irq_status & PHYEV_DCDR_ERR)
2036                 mv_dprintk("port %d STP decoding error.\n",
2037                 phy_no+mvi->id*mvi->chip->n_phy);
2038
2039         if (phy->irq_status & PHYEV_POOF) {
2040                 if (!(phy->phy_event & PHY_PLUG_OUT)) {
2041                         int dev_sata = phy->phy_type & PORT_TYPE_SATA;
2042                         int ready;
2043                         mvs_release_task(mvi, phy_no, NULL);
2044                         phy->phy_event |= PHY_PLUG_OUT;
2045                         mvs_handle_event(mvi,
2046                                 (void *)(unsigned long)phy_no,
2047                                 PHY_PLUG_EVENT);
2048                         ready = mvs_is_phy_ready(mvi, phy_no);
2049                         if (!ready)
2050                                 mv_dprintk("phy%d Unplug Notice\n",
2051                                         phy_no +
2052                                         mvi->id * mvi->chip->n_phy);
2053                         if (ready || dev_sata) {
2054                                 if (MVS_CHIP_DISP->stp_reset)
2055                                         MVS_CHIP_DISP->stp_reset(mvi,
2056                                                         phy_no);
2057                                 else
2058                                         MVS_CHIP_DISP->phy_reset(mvi,
2059                                                         phy_no, 0);
2060                                 return;
2061                         }
2062                 }
2063         }
2064
2065         if (phy->irq_status & PHYEV_COMWAKE) {
2066                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, phy_no);
2067                 MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
2068                                         tmp | PHYEV_SIG_FIS);
2069                 if (phy->timer.function == NULL) {
2070                         phy->timer.data = (unsigned long)phy;
2071                         phy->timer.function = mvs_sig_time_out;
2072                         phy->timer.expires = jiffies + 10*HZ;
2073                         add_timer(&phy->timer);
2074                 }
2075         }
2076         if (phy->irq_status & (PHYEV_SIG_FIS | PHYEV_ID_DONE)) {
2077                 phy->phy_status = mvs_is_phy_ready(mvi, phy_no);
2078                 mvs_sig_remove_timer(phy);
2079                 mv_dprintk("notify plug in on phy[%d]\n", phy_no);
2080                 if (phy->phy_status) {
2081                         mdelay(10);
2082                         MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
2083                         if (phy->phy_type & PORT_TYPE_SATA) {
2084                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(
2085                                                 mvi, phy_no);
2086                                 tmp &= ~PHYEV_SIG_FIS;
2087                                 MVS_CHIP_DISP->write_port_irq_mask(mvi,
2088                                                         phy_no, tmp);
2089                         }
2090                         mvs_update_phyinfo(mvi, phy_no, 0);
2091                         mvs_bytes_dmaed(mvi, phy_no);
2092                         /* whether driver is going to handle hot plug */
2093                         if (phy->phy_event & PHY_PLUG_OUT) {
2094                                 mvs_port_notify_formed(sas_phy, 0);
2095                                 phy->phy_event &= ~PHY_PLUG_OUT;
2096                         }
2097                 } else {
2098                         mv_dprintk("plugin interrupt but phy%d is gone\n",
2099                                 phy_no + mvi->id*mvi->chip->n_phy);
2100                 }
2101         } else if (phy->irq_status & PHYEV_BROAD_CH) {
2102                 mv_dprintk("port %d broadcast change.\n",
2103                         phy_no + mvi->id*mvi->chip->n_phy);
2104                 /* exception for Samsung disk drive*/
2105                 mdelay(1000);
2106                 sas_ha->notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
2107         }
2108         MVS_CHIP_DISP->write_port_irq_stat(mvi, phy_no, phy->irq_status);
2109 }
2110
2111 int mvs_int_rx(struct mvs_info *mvi, bool self_clear)
2112 {
2113         u32 rx_prod_idx, rx_desc;
2114         bool attn = false;
2115
2116         /* the first dword in the RX ring is special: it contains
2117          * a mirror of the hardware's RX producer index, so that
2118          * we don't have to stall the CPU reading that register.
2119          * The actual RX ring is offset by one dword, due to this.
2120          */
2121         rx_prod_idx = mvi->rx_cons;
2122         mvi->rx_cons = le32_to_cpu(mvi->rx[0]);
2123         if (mvi->rx_cons == 0xfff)      /* h/w hasn't touched RX ring yet */
2124                 return 0;
2125
2126         /* The CMPL_Q may come late, read from register and try again
2127         * note: if coalescing is enabled,
2128         * it will need to read from register every time for sure
2129         */
2130         if (unlikely(mvi->rx_cons == rx_prod_idx))
2131                 mvi->rx_cons = MVS_CHIP_DISP->rx_update(mvi) & RX_RING_SZ_MASK;
2132
2133         if (mvi->rx_cons == rx_prod_idx)
2134                 return 0;
2135
2136         while (mvi->rx_cons != rx_prod_idx) {
2137                 /* increment our internal RX consumer pointer */
2138                 rx_prod_idx = (rx_prod_idx + 1) & (MVS_RX_RING_SZ - 1);
2139                 rx_desc = le32_to_cpu(mvi->rx[rx_prod_idx + 1]);
2140
2141                 if (likely(rx_desc & RXQ_DONE))
2142                         mvs_slot_complete(mvi, rx_desc, 0);
2143                 if (rx_desc & RXQ_ATTN) {
2144                         attn = true;
2145                 } else if (rx_desc & RXQ_ERR) {
2146                         if (!(rx_desc & RXQ_DONE))
2147                                 mvs_slot_complete(mvi, rx_desc, 0);
2148                 } else if (rx_desc & RXQ_SLOT_RESET) {
2149                         mvs_slot_free(mvi, rx_desc);
2150                 }
2151         }
2152
2153         if (attn && self_clear)
2154                 MVS_CHIP_DISP->int_full(mvi);
2155         return 0;
2156 }
2157