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 = 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 = &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 = &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 = &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_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
 229         struct mvs_info *mvi = mvi_dev->mvi_info;
 230         struct sas_ha_struct *sha = dev->port->ha;
 231
 232         while (sha->sas_port[i]) {
 233                 if (sha->sas_port[i] == dev->port) {
 234                         struct asd_sas_phy *phy;
 235                         list_for_each_entry(phy,
 236                                 &sha->sas_port[i]->phy_list, port_phy_el) {
 237                                 j = 0;
 238                                 while (sha->sas_phy[j]) {
 239                                         if (sha->sas_phy[j] == phy)
 240                                                 break;
 241                                         j++;
 242                                 }
 243                                 phyno[n] = (j >= mvi->chip->n_phy) ?
 244                                         (j - mvi->chip->n_phy) : j;
 245                                 num++;
 246                                 n++;
 247                         }
 248                         break;
 249                 }
 250                 i++;
 251         }
 252         return num;
 253 }
 254
 255 static inline void mvs_free_reg_set(struct mvs_info *mvi,
 256                                 struct mvs_device *dev)
 257 {
 258         if (!dev) {
 259                 mv_printk("device has been free.\n");
 260                 return;
 261         }
 262         if (dev->runing_req != 0)
 263                 return;
 264         if (dev->taskfileset == MVS_ID_NOT_MAPPED)
 265                 return;
 266         MVS_CHIP_DISP->free_reg_set(mvi, &dev->taskfileset);
 267 }
 268
 269 static inline u8 mvs_assign_reg_set(struct mvs_info *mvi,
 270                                 struct mvs_device *dev)
 271 {
 272         if (dev->taskfileset != MVS_ID_NOT_MAPPED)
 273                 return 0;
 274         return MVS_CHIP_DISP->assign_reg_set(mvi, &dev->taskfileset);
 275 }
 276
 277 void mvs_phys_reset(struct mvs_info *mvi, u32 phy_mask, int hard)
 278 {
 279         u32 no;
 280         for_each_phy(phy_mask, phy_mask, no) {
 281                 if (!(phy_mask & 1))
 282                         continue;
 283                 MVS_CHIP_DISP->phy_reset(mvi, no, hard);
 284         }
 285 }
 286
 287 /* FIXME: locking? */
 288 int mvs_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 289                         void *funcdata)
 290 {
 291         int rc = 0, phy_id = sas_phy->id;
 292         u32 tmp, i = 0, hi;
 293         struct sas_ha_struct *sha = sas_phy->ha;
 294         struct mvs_info *mvi = NULL;
 295
 296         while (sha->sas_phy[i]) {
 297                 if (sha->sas_phy[i] == sas_phy)
 298                         break;
 299                 i++;
 300         }
 301         hi = i/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
 302         mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
 303
 304         switch (func) {
 305         case PHY_FUNC_SET_LINK_RATE:
 306                 MVS_CHIP_DISP->phy_set_link_rate(mvi, phy_id, funcdata);
 307                 break;
 308
 309         case PHY_FUNC_HARD_RESET:
 310                 tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_id);
 311                 if (tmp & PHY_RST_HARD)
 312                         break;
 313                 MVS_CHIP_DISP->phy_reset(mvi, phy_id, 1);
 314                 break;
 315
 316         case PHY_FUNC_LINK_RESET:
 317                 MVS_CHIP_DISP->phy_enable(mvi, phy_id);
 318                 MVS_CHIP_DISP->phy_reset(mvi, phy_id, 0);
 319                 break;
 320
 321         case PHY_FUNC_DISABLE:
 322                 MVS_CHIP_DISP->phy_disable(mvi, phy_id);
 323                 break;
 324         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 325         default:
 326                 rc = -EOPNOTSUPP;
 327         }
 328         msleep(200);
 329         return rc;
 330 }
 331
 332 void __devinit mvs_set_sas_addr(struct mvs_info *mvi, int port_id,
 333                                 u32 off_lo, u32 off_hi, u64 sas_addr)
 334 {
 335         u32 lo = (u32)sas_addr;
 336         u32 hi = (u32)(sas_addr>>32);
 337
 338         MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_lo);
 339         MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, lo);
 340         MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_hi);
 341         MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, hi);
 342 }
 343
 344 static void mvs_bytes_dmaed(struct mvs_info *mvi, int i)
 345 {
 346         struct mvs_phy *phy = &mvi->phy[i];
 347         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 348         struct sas_ha_struct *sas_ha;
 349         if (!phy->phy_attached)
 350                 return;
 351
 352         if (!(phy->att_dev_info & PORT_DEV_TRGT_MASK)
 353                 && phy->phy_type & PORT_TYPE_SAS) {
 354                 return;
 355         }
 356
 357         sas_ha = mvi->sas;
 358         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 359
 360         if (sas_phy->phy) {
 361                 struct sas_phy *sphy = sas_phy->phy;
 362
 363                 sphy->negotiated_linkrate = sas_phy->linkrate;
 364                 sphy->minimum_linkrate = phy->minimum_linkrate;
 365                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 366                 sphy->maximum_linkrate = phy->maximum_linkrate;
 367                 sphy->maximum_linkrate_hw = MVS_CHIP_DISP->phy_max_link_rate();
 368         }
 369
 370         if (phy->phy_type & PORT_TYPE_SAS) {
 371                 struct sas_identify_frame *id;
 372
 373                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 374                 id->dev_type = phy->identify.device_type;
 375                 id->initiator_bits = SAS_PROTOCOL_ALL;
 376                 id->target_bits = phy->identify.target_port_protocols;
 377         } else if (phy->phy_type & PORT_TYPE_SATA) {
 378                 /*Nothing*/
 379         }
 380         mv_dprintk("phy %d byte dmaded.\n", i + mvi->id * mvi->chip->n_phy);
 381
 382         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 383
 384         mvi->sas->notify_port_event(sas_phy,
 385                                    PORTE_BYTES_DMAED);
 386 }
 387
 388 int mvs_slave_alloc(struct scsi_device *scsi_dev)
 389 {
 390         struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
 391         if (dev_is_sata(dev)) {
 392                 /* We don't need to rescan targets
 393                  * if REPORT_LUNS request is failed
 394                  */
 395                 if (scsi_dev->lun > 0)
 396                         return -ENXIO;
 397                 scsi_dev->tagged_supported = 1;
 398         }
 399
 400         return sas_slave_alloc(scsi_dev);
 401 }
 402
 403 int mvs_slave_configure(struct scsi_device *sdev)
 404 {
 405         struct domain_device *dev = sdev_to_domain_dev(sdev);
 406         int ret = sas_slave_configure(sdev);
 407
 408         if (ret)
 409                 return ret;
 410         if (dev_is_sata(dev)) {
 411                 /* may set PIO mode */
 412         #if MV_DISABLE_NCQ
 413                 struct ata_port *ap = dev->sata_dev.ap;
 414                 struct ata_device *adev = ap->link.device;
 415                 adev->flags |= ATA_DFLAG_NCQ_OFF;
 416                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, 1);
 417         #endif
 418         }
 419         return 0;
 420 }
 421
 422 void mvs_scan_start(struct Scsi_Host *shost)
 423 {
 424         int i, j;
 425         unsigned short core_nr;
 426         struct mvs_info *mvi;
 427         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 428
 429         core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host;
 430
 431         for (j = 0; j < core_nr; j++) {
 432                 mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[j];
 433                 for (i = 0; i < mvi->chip->n_phy; ++i)
 434                         mvs_bytes_dmaed(mvi, i);
 435         }
 436 }
 437
 438 int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time)
 439 {
 440         /* give the phy enabling interrupt event time to come in (1s
 441          * is empirically about all it takes) */
 442         if (time < HZ)
 443                 return 0;
 444         /* Wait for discovery to finish */
 445         scsi_flush_work(shost);
 446         return 1;
 447 }
 448
 449 static int mvs_task_prep_smp(struct mvs_info *mvi,
 450                              struct mvs_task_exec_info *tei)
 451 {
 452         int elem, rc, i;
 453         struct sas_task *task = tei->task;
 454         struct mvs_cmd_hdr *hdr = tei->hdr;
 455         struct domain_device *dev = task->dev;
 456         struct asd_sas_port *sas_port = dev->port;
 457         struct scatterlist *sg_req, *sg_resp;
 458         u32 req_len, resp_len, tag = tei->tag;
 459         void *buf_tmp;
 460         u8 *buf_oaf;
 461         dma_addr_t buf_tmp_dma;
 462         void *buf_prd;
 463         struct mvs_slot_info *slot = &mvi->slot_info[tag];
 464         u32 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
 465 #if _MV_DUMP
 466         u8 *buf_cmd;
 467         void *from;
 468 #endif
 469         /*
 470          * DMA-map SMP request, response buffers
 471          */
 472         sg_req = &task->smp_task.smp_req;
 473         elem = dma_map_sg(mvi->dev, sg_req, 1, PCI_DMA_TODEVICE);
 474         if (!elem)
 475                 return -ENOMEM;
 476         req_len = sg_dma_len(sg_req);
 477
 478         sg_resp = &task->smp_task.smp_resp;
 479         elem = dma_map_sg(mvi->dev, sg_resp, 1, PCI_DMA_FROMDEVICE);
 480         if (!elem) {
 481                 rc = -ENOMEM;
 482                 goto err_out;
 483         }
 484         resp_len = SB_RFB_MAX;
 485
 486         /* must be in dwords */
 487         if ((req_len & 0x3) || (resp_len & 0x3)) {
 488                 rc = -EINVAL;
 489                 goto err_out_2;
 490         }
 491
 492         /*
 493          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 494          */
 495
 496         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ***** */
 497         buf_tmp = slot->buf;
 498         buf_tmp_dma = slot->buf_dma;
 499
 500 #if _MV_DUMP
 501         buf_cmd = buf_tmp;
 502         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 503         buf_tmp += req_len;
 504         buf_tmp_dma += req_len;
 505         slot->cmd_size = req_len;
 506 #else
 507         hdr->cmd_tbl = cpu_to_le64(sg_dma_address(sg_req));
 508 #endif
 509
 510         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 511         buf_oaf = buf_tmp;
 512         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 513
 514         buf_tmp += MVS_OAF_SZ;
 515         buf_tmp_dma += MVS_OAF_SZ;
 516
 517         /* region 3: PRD table *********************************** */
 518         buf_prd = buf_tmp;
 519         if (tei->n_elem)
 520                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 521         else
 522                 hdr->prd_tbl = 0;
 523
 524         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 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         /*
 535          * Fill in TX ring and command slot header
 536          */
 537         slot->tx = mvi->tx_prod;
 538         mvi->tx[mvi->tx_prod] = cpu_to_le32((TXQ_CMD_SMP << TXQ_CMD_SHIFT) |
 539                                         TXQ_MODE_I | tag |
 540                                         (sas_port->phy_mask << TXQ_PHY_SHIFT));
 541
 542         hdr->flags |= flags;
 543         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | ((req_len - 4) / 4));
 544         hdr->tags = cpu_to_le32(tag);
 545         hdr->data_len = 0;
 546
 547         /* generate open address frame hdr (first 12 bytes) */
 548         /* initiator, SMP, ftype 1h */
 549         buf_oaf[0] = (1 << 7) | (PROTOCOL_SMP << 4) | 0x01;
 550         buf_oaf[1] = dev->linkrate & 0xf;
 551         *(u16 *)(buf_oaf + 2) = 0xFFFF;         /* SAS SPEC */
 552         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 553
 554         /* fill in PRD (scatter/gather) table, if any */
 555         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 556
 557 #if _MV_DUMP
 558         /* copy cmd table */
 559         from = kmap_atomic(sg_page(sg_req), KM_IRQ0);
 560         memcpy(buf_cmd, from + sg_req->offset, req_len);
 561         kunmap_atomic(from, KM_IRQ0);
 562 #endif
 563         return 0;
 564
 565 err_out_2:
 566         dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_resp, 1,
 567                      PCI_DMA_FROMDEVICE);
 568 err_out:
 569         dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_req, 1,
 570                      PCI_DMA_TODEVICE);
 571         return rc;
 572 }
 573
 574 static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag)
 575 {
 576         struct ata_queued_cmd *qc = task->uldd_task;
 577
 578         if (qc) {
 579                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 580                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 581                         *tag = qc->tag;
 582                         return 1;
 583                 }
 584         }
 585
 586         return 0;
 587 }
 588
 589 static int mvs_task_prep_ata(struct mvs_info *mvi,
 590                              struct mvs_task_exec_info *tei)
 591 {
 592         struct sas_task *task = tei->task;
 593         struct domain_device *dev = task->dev;
 594         struct mvs_device *mvi_dev = 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 = dev->lldd_dev;
 736         struct asd_sas_port *sas_port = dev->port;
 737         struct mvs_slot_info *slot;
 738         void *buf_prd;
 739         struct ssp_frame_hdr *ssp_hdr;
 740         void *buf_tmp;
 741         u8 *buf_cmd, *buf_oaf, fburst = 0;
 742         dma_addr_t buf_tmp_dma;
 743         u32 flags;
 744         u32 resp_len, req_len, i, tag = tei->tag;
 745         const u32 max_resp_len = SB_RFB_MAX;
 746         u32 phy_mask;
 747
 748         slot = &mvi->slot_info[tag];
 749
 750         phy_mask = ((port->wide_port_phymap) ? port->wide_port_phymap :
 751                 sas_port->phy_mask) & TXQ_PHY_MASK;
 752
 753         slot->tx = mvi->tx_prod;
 754         mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag |
 755                                 (TXQ_CMD_SSP << TXQ_CMD_SHIFT) |
 756                                 (phy_mask << TXQ_PHY_SHIFT));
 757
 758         flags = MCH_RETRY;
 759         if (task->ssp_task.enable_first_burst) {
 760                 flags |= MCH_FBURST;
 761                 fburst = (1 << 7);
 762         }
 763         if (is_tmf)
 764                 flags |= (MCH_SSP_FR_TASK << MCH_SSP_FR_TYPE_SHIFT);
 765         else
 766                 flags |= (MCH_SSP_FR_CMD << MCH_SSP_FR_TYPE_SHIFT);
 767         hdr->flags = cpu_to_le32(flags | (tei->n_elem << MCH_PRD_LEN_SHIFT));
 768         hdr->tags = cpu_to_le32(tag);
 769         hdr->data_len = cpu_to_le32(task->total_xfer_len);
 770
 771         /*
 772          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
 773          */
 774
 775         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ************** */
 776         buf_cmd = buf_tmp = slot->buf;
 777         buf_tmp_dma = slot->buf_dma;
 778
 779         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
 780
 781         buf_tmp += MVS_SSP_CMD_SZ;
 782         buf_tmp_dma += MVS_SSP_CMD_SZ;
 783 #if _MV_DUMP
 784         slot->cmd_size = MVS_SSP_CMD_SZ;
 785 #endif
 786
 787         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
 788         buf_oaf = buf_tmp;
 789         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
 790
 791         buf_tmp += MVS_OAF_SZ;
 792         buf_tmp_dma += MVS_OAF_SZ;
 793
 794         /* region 3: PRD table ********************************************* */
 795         buf_prd = buf_tmp;
 796         if (tei->n_elem)
 797                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
 798         else
 799                 hdr->prd_tbl = 0;
 800
 801         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
 802         buf_tmp += i;
 803         buf_tmp_dma += i;
 804
 805         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
 806         slot->response = buf_tmp;
 807         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
 808         if (mvi->flags & MVF_FLAG_SOC)
 809                 hdr->reserved[0] = 0;
 810
 811         resp_len = MVS_SLOT_BUF_SZ - MVS_SSP_CMD_SZ - MVS_OAF_SZ -
 812             sizeof(struct mvs_err_info) - i;
 813         resp_len = min(resp_len, max_resp_len);
 814
 815         req_len = sizeof(struct ssp_frame_hdr) + 28;
 816
 817         /* request, response lengths */
 818         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
 819
 820         /* generate open address frame hdr (first 12 bytes) */
 821         /* initiator, SSP, ftype 1h */
 822         buf_oaf[0] = (1 << 7) | (PROTOCOL_SSP << 4) | 0x1;
 823         buf_oaf[1] = dev->linkrate & 0xf;
 824         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
 825         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
 826
 827         /* fill in SSP frame header (Command Table.SSP frame header) */
 828         ssp_hdr = (struct ssp_frame_hdr *)buf_cmd;
 829
 830         if (is_tmf)
 831                 ssp_hdr->frame_type = SSP_TASK;
 832         else
 833                 ssp_hdr->frame_type = SSP_COMMAND;
 834
 835         memcpy(ssp_hdr->hashed_dest_addr, dev->hashed_sas_addr,
 836                HASHED_SAS_ADDR_SIZE);
 837         memcpy(ssp_hdr->hashed_src_addr,
 838                dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
 839         ssp_hdr->tag = cpu_to_be16(tag);
 840
 841         /* fill in IU for TASK and Command Frame */
 842         buf_cmd += sizeof(*ssp_hdr);
 843         memcpy(buf_cmd, &task->ssp_task.LUN, 8);
 844
 845         if (ssp_hdr->frame_type != SSP_TASK) {
 846                 buf_cmd[9] = fburst | task->ssp_task.task_attr |
 847                                 (task->ssp_task.task_prio << 3);
 848                 memcpy(buf_cmd + 12, &task->ssp_task.cdb, 16);
 849         } else{
 850                 buf_cmd[10] = tmf->tmf;
 851                 switch (tmf->tmf) {
 852                 case TMF_ABORT_TASK:
 853                 case TMF_QUERY_TASK:
 854                         buf_cmd[12] =
 855                                 (tmf->tag_of_task_to_be_managed >> 8) & 0xff;
 856                         buf_cmd[13] =
 857                                 tmf->tag_of_task_to_be_managed & 0xff;
 858                         break;
 859                 default:
 860                         break;
 861                 }
 862         }
 863         /* fill in PRD (scatter/gather) table, if any */
 864         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
 865         return 0;
 866 }
 867
 868 #define DEV_IS_GONE(mvi_dev)    ((!mvi_dev || (mvi_dev->dev_type == NO_DEVICE)))
 869 static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags,
 870                                 struct completion *completion,int is_tmf,
 871                                 struct mvs_tmf_task *tmf)
 872 {
 873         struct domain_device *dev = task->dev;
 874         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
 875         struct mvs_info *mvi = mvi_dev->mvi_info;
 876         struct mvs_task_exec_info tei;
 877         struct sas_task *t = task;
 878         struct mvs_slot_info *slot;
 879         u32 tag = 0xdeadbeef, rc, n_elem = 0;
 880         u32 n = num, pass = 0;
 881         unsigned long flags = 0;
 882
 883         if (!dev->port) {
 884                 struct task_status_struct *tsm = &t->task_status;
 885
 886                 tsm->resp = SAS_TASK_UNDELIVERED;
 887                 tsm->stat = SAS_PHY_DOWN;
 888                 t->task_done(t);
 889                 return 0;
 890         }
 891
 892         spin_lock_irqsave(&mvi->lock, flags);
 893         do {
 894                 dev = t->dev;
 895                 mvi_dev = dev->lldd_dev;
 896                 if (DEV_IS_GONE(mvi_dev)) {
 897                         if (mvi_dev)
 898                                 mv_dprintk("device %d not ready.\n",
 899                                         mvi_dev->device_id);
 900                         else
 901                                 mv_dprintk("device %016llx not ready.\n",
 902                                         SAS_ADDR(dev->sas_addr));
 903
 904                         rc = SAS_PHY_DOWN;
 905                         goto out_done;
 906                 }
 907
 908                 if (dev->port->id >= mvi->chip->n_phy)
 909                         tei.port = &mvi->port[dev->port->id - mvi->chip->n_phy];
 910                 else
 911                         tei.port = &mvi->port[dev->port->id];
 912
 913                 if (!tei.port->port_attached) {
 914                         if (sas_protocol_ata(t->task_proto)) {
 915                                 mv_dprintk("port %d does not"
 916                                         "attached device.\n", dev->port->id);
 917                                 rc = SAS_PHY_DOWN;
 918                                 goto out_done;
 919                         } else {
 920                                 struct task_status_struct *ts = &t->task_status;
 921                                 ts->resp = SAS_TASK_UNDELIVERED;
 922                                 ts->stat = SAS_PHY_DOWN;
 923                                 t->task_done(t);
 924                                 if (n > 1)
 925                                         t = list_entry(t->list.next,
 926                                                         struct sas_task, list);
 927                                 continue;
 928                         }
 929                 }
 930
 931                 if (!sas_protocol_ata(t->task_proto)) {
 932                         if (t->num_scatter) {
 933                                 n_elem = dma_map_sg(mvi->dev,
 934                                                     t->scatter,
 935                                                     t->num_scatter,
 936                                                     t->data_dir);
 937                                 if (!n_elem) {
 938                                         rc = -ENOMEM;
 939                                         goto err_out;
 940                                 }
 941                         }
 942                 } else {
 943                         n_elem = t->num_scatter;
 944                 }
 945
 946                 rc = mvs_tag_alloc(mvi, &tag);
 947                 if (rc)
 948                         goto err_out;
 949
 950                 slot = &mvi->slot_info[tag];
 951
 952
 953                 t->lldd_task = NULL;
 954                 slot->n_elem = n_elem;
 955                 slot->slot_tag = tag;
 956                 memset(slot->buf, 0, MVS_SLOT_BUF_SZ);
 957
 958                 tei.task = t;
 959                 tei.hdr = &mvi->slot[tag];
 960                 tei.tag = tag;
 961                 tei.n_elem = n_elem;
 962                 switch (t->task_proto) {
 963                 case SAS_PROTOCOL_SMP:
 964                         rc = mvs_task_prep_smp(mvi, &tei);
 965                         break;
 966                 case SAS_PROTOCOL_SSP:
 967                         rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf);
 968                         break;
 969                 case SAS_PROTOCOL_SATA:
 970                 case SAS_PROTOCOL_STP:
 971                 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 972                         rc = mvs_task_prep_ata(mvi, &tei);
 973                         break;
 974                 default:
 975                         dev_printk(KERN_ERR, mvi->dev,
 976                                 "unknown sas_task proto: 0x%x\n",
 977                                 t->task_proto);
 978                         rc = -EINVAL;
 979                         break;
 980                 }
 981
 982                 if (rc) {
 983                         mv_dprintk("rc is %x\n", rc);
 984                         goto err_out_tag;
 985                 }
 986                 slot->task = t;
 987                 slot->port = tei.port;
 988                 t->lldd_task = slot;
 989                 list_add_tail(&slot->entry, &tei.port->list);
 990                 /* TODO: select normal or high priority */
 991                 spin_lock(&t->task_state_lock);
 992                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
 993                 spin_unlock(&t->task_state_lock);
 994
 995                 mvs_hba_memory_dump(mvi, tag, t->task_proto);
 996                 mvi_dev->runing_req++;
 997                 ++pass;
 998                 mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
 999                 if (n > 1)
1000                         t = list_entry(t->list.next, struct sas_task, list);
1001         } while (--n);
1002         rc = 0;
1003         goto out_done;
1004
1005 err_out_tag:
1006         mvs_tag_free(mvi, tag);
1007 err_out:
1008
1009         dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
1010         if (!sas_protocol_ata(t->task_proto))
1011                 if (n_elem)
1012                         dma_unmap_sg(mvi->dev, t->scatter, n_elem,
1013                                      t->data_dir);
1014 out_done:
1015         if (likely(pass)) {
1016                 MVS_CHIP_DISP->start_delivery(mvi,
1017                         (mvi->tx_prod - 1) & (MVS_CHIP_SLOT_SZ - 1));
1018         }
1019         spin_unlock_irqrestore(&mvi->lock, flags);
1020         return rc;
1021 }
1022
1023 int mvs_queue_command(struct sas_task *task, const int num,
1024                         gfp_t gfp_flags)
1025 {
1026         return mvs_task_exec(task, num, gfp_flags, NULL, 0, NULL);
1027 }
1028
1029 static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc)
1030 {
1031         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1032         mvs_tag_clear(mvi, slot_idx);
1033 }
1034
1035 static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task,
1036                           struct mvs_slot_info *slot, u32 slot_idx)
1037 {
1038         if (!slot->task)
1039                 return;
1040         if (!sas_protocol_ata(task->task_proto))
1041                 if (slot->n_elem)
1042                         dma_unmap_sg(mvi->dev, task->scatter,
1043                                      slot->n_elem, task->data_dir);
1044
1045         switch (task->task_proto) {
1046         case SAS_PROTOCOL_SMP:
1047                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_resp, 1,
1048                              PCI_DMA_FROMDEVICE);
1049                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_req, 1,
1050                              PCI_DMA_TODEVICE);
1051                 break;
1052
1053         case SAS_PROTOCOL_SATA:
1054         case SAS_PROTOCOL_STP:
1055         case SAS_PROTOCOL_SSP:
1056         default:
1057                 /* do nothing */
1058                 break;
1059         }
1060         list_del_init(&slot->entry);
1061         task->lldd_task = NULL;
1062         slot->task = NULL;
1063         slot->port = NULL;
1064         slot->slot_tag = 0xFFFFFFFF;
1065         mvs_slot_free(mvi, slot_idx);
1066 }
1067
1068 static void mvs_update_wideport(struct mvs_info *mvi, int i)
1069 {
1070         struct mvs_phy *phy = &mvi->phy[i];
1071         struct mvs_port *port = phy->port;
1072         int j, no;
1073
1074         for_each_phy(port->wide_port_phymap, j, no) {
1075                 if (j & 1) {
1076                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
1077                                                 PHYR_WIDE_PORT);
1078                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
1079                                                 port->wide_port_phymap);
1080                 } else {
1081                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
1082                                                 PHYR_WIDE_PORT);
1083                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
1084                                                 0);
1085                 }
1086         }
1087 }
1088
1089 static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i)
1090 {
1091         u32 tmp;
1092         struct mvs_phy *phy = &mvi->phy[i];
1093         struct mvs_port *port = phy->port;
1094
1095         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, i);
1096         if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) {
1097                 if (!port)
1098                         phy->phy_attached = 1;
1099                 return tmp;
1100         }
1101
1102         if (port) {
1103                 if (phy->phy_type & PORT_TYPE_SAS) {
1104                         port->wide_port_phymap &= ~(1U << i);
1105                         if (!port->wide_port_phymap)
1106                                 port->port_attached = 0;
1107                         mvs_update_wideport(mvi, i);
1108                 } else if (phy->phy_type & PORT_TYPE_SATA)
1109                         port->port_attached = 0;
1110                 phy->port = NULL;
1111                 phy->phy_attached = 0;
1112                 phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);
1113         }
1114         return 0;
1115 }
1116
1117 static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf)
1118 {
1119         u32 *s = (u32 *) buf;
1120
1121         if (!s)
1122                 return NULL;
1123
1124         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG3);
1125         s[3] = MVS_CHIP_DISP->read_port_cfg_data(mvi, i);
1126
1127         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG2);
1128         s[2] = MVS_CHIP_DISP->read_port_cfg_data(mvi, i);
1129
1130         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG1);
1131         s[1] = MVS_CHIP_DISP->read_port_cfg_data(mvi, i);
1132
1133         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG0);
1134         s[0] = MVS_CHIP_DISP->read_port_cfg_data(mvi, i);
1135
1136         /* Workaround: take some ATAPI devices for ATA */
1137         if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01))
1138                 s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10);
1139
1140         return s;
1141 }
1142
1143 static u32 mvs_is_sig_fis_received(u32 irq_status)
1144 {
1145         return irq_status & PHYEV_SIG_FIS;
1146 }
1147
1148 void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st)
1149 {
1150         struct mvs_phy *phy = &mvi->phy[i];
1151         struct sas_identify_frame *id;
1152
1153         id = (struct sas_identify_frame *)phy->frame_rcvd;
1154
1155         if (get_st) {
1156                 phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, i);
1157                 phy->phy_status = mvs_is_phy_ready(mvi, i);
1158         }
1159
1160         if (phy->phy_status) {
1161                 int oob_done = 0;
1162                 struct asd_sas_phy *sas_phy = &mvi->phy[i].sas_phy;
1163
1164                 oob_done = MVS_CHIP_DISP->oob_done(mvi, i);
1165
1166                 MVS_CHIP_DISP->fix_phy_info(mvi, i, id);
1167                 if (phy->phy_type & PORT_TYPE_SATA) {
1168                         phy->identify.target_port_protocols = SAS_PROTOCOL_STP;
1169                         if (mvs_is_sig_fis_received(phy->irq_status)) {
1170                                 phy->phy_attached = 1;
1171                                 phy->att_dev_sas_addr =
1172                                         i + mvi->id * mvi->chip->n_phy;
1173                                 if (oob_done)
1174                                         sas_phy->oob_mode = SATA_OOB_MODE;
1175                                 phy->frame_rcvd_size =
1176                                     sizeof(struct dev_to_host_fis);
1177                                 mvs_get_d2h_reg(mvi, i, id);
1178                         } else {
1179                                 u32 tmp;
1180                                 dev_printk(KERN_DEBUG, mvi->dev,
1181                                         "Phy%d : No sig fis\n", i);
1182                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, i);
1183                                 MVS_CHIP_DISP->write_port_irq_mask(mvi, i,
1184                                                 tmp | PHYEV_SIG_FIS);
1185                                 phy->phy_attached = 0;
1186                                 phy->phy_type &= ~PORT_TYPE_SATA;
1187                                 MVS_CHIP_DISP->phy_reset(mvi, i, 0);
1188                                 goto out_done;
1189                         }
1190                 }               else if (phy->phy_type & PORT_TYPE_SAS
1191                         || phy->att_dev_info & PORT_SSP_INIT_MASK) {
1192                         phy->phy_attached = 1;
1193                         phy->identify.device_type =
1194                                 phy->att_dev_info & PORT_DEV_TYPE_MASK;
1195
1196                         if (phy->identify.device_type == SAS_END_DEV)
1197                                 phy->identify.target_port_protocols =
1198                                                         SAS_PROTOCOL_SSP;
1199                         else if (phy->identify.device_type != NO_DEVICE)
1200                                 phy->identify.target_port_protocols =
1201                                                         SAS_PROTOCOL_SMP;
1202                         if (oob_done)
1203                                 sas_phy->oob_mode = SAS_OOB_MODE;
1204                         phy->frame_rcvd_size =
1205                             sizeof(struct sas_identify_frame);
1206                 }
1207                 memcpy(sas_phy->attached_sas_addr,
1208                         &phy->att_dev_sas_addr, SAS_ADDR_SIZE);
1209
1210                 if (MVS_CHIP_DISP->phy_work_around)
1211                         MVS_CHIP_DISP->phy_work_around(mvi, i);
1212         }
1213         mv_dprintk("port %d attach dev info is %x\n",
1214                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_info);
1215         mv_dprintk("port %d attach sas addr is %llx\n",
1216                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_sas_addr);
1217 out_done:
1218         if (get_st)
1219                 MVS_CHIP_DISP->write_port_irq_stat(mvi, i, phy->irq_status);
1220 }
1221
1222 static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
1223 {
1224         struct sas_ha_struct *sas_ha = sas_phy->ha;
1225         struct mvs_info *mvi = NULL; int i = 0, hi;
1226         struct mvs_phy *phy = sas_phy->lldd_phy;
1227         struct asd_sas_port *sas_port = sas_phy->port;
1228         struct mvs_port *port;
1229         unsigned long flags = 0;
1230         if (!sas_port)
1231                 return;
1232
1233         while (sas_ha->sas_phy[i]) {
1234                 if (sas_ha->sas_phy[i] == sas_phy)
1235                         break;
1236                 i++;
1237         }
1238         hi = i/((struct mvs_prv_info *)sas_ha->lldd_ha)->n_phy;
1239         mvi = ((struct mvs_prv_info *)sas_ha->lldd_ha)->mvi[hi];
1240         if (sas_port->id >= mvi->chip->n_phy)
1241                 port = &mvi->port[sas_port->id - mvi->chip->n_phy];
1242         else
1243                 port = &mvi->port[sas_port->id];
1244         if (lock)
1245                 spin_lock_irqsave(&mvi->lock, flags);
1246         port->port_attached = 1;
1247         phy->port = port;
1248         if (phy->phy_type & PORT_TYPE_SAS) {
1249                 port->wide_port_phymap = sas_port->phy_mask;
1250                 mv_printk("set wide port phy map %x\n", sas_port->phy_mask);
1251                 mvs_update_wideport(mvi, sas_phy->id);
1252         }
1253         if (lock)
1254                 spin_unlock_irqrestore(&mvi->lock, flags);
1255 }
1256
1257 static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock)
1258 {
1259         /*Nothing*/
1260 }
1261
1262
1263 void mvs_port_formed(struct asd_sas_phy *sas_phy)
1264 {
1265         mvs_port_notify_formed(sas_phy, 1);
1266 }
1267
1268 void mvs_port_deformed(struct asd_sas_phy *sas_phy)
1269 {
1270         mvs_port_notify_deformed(sas_phy, 1);
1271 }
1272
1273 struct mvs_device *mvs_alloc_dev(struct mvs_info *mvi)
1274 {
1275         u32 dev;
1276         for (dev = 0; dev < MVS_MAX_DEVICES; dev++) {
1277                 if (mvi->devices[dev].dev_type == NO_DEVICE) {
1278                         mvi->devices[dev].device_id = dev;
1279                         return &mvi->devices[dev];
1280                 }
1281         }
1282
1283         if (dev == MVS_MAX_DEVICES)
1284                 mv_printk("max support %d devices, ignore ..\n",
1285                         MVS_MAX_DEVICES);
1286
1287         return NULL;
1288 }
1289
1290 void mvs_free_dev(struct mvs_device *mvi_dev)
1291 {
1292         u32 id = mvi_dev->device_id;
1293         memset(mvi_dev, 0, sizeof(*mvi_dev));
1294         mvi_dev->device_id = id;
1295         mvi_dev->dev_type = NO_DEVICE;
1296         mvi_dev->dev_status = MVS_DEV_NORMAL;
1297         mvi_dev->taskfileset = MVS_ID_NOT_MAPPED;
1298 }
1299
1300 int mvs_dev_found_notify(struct domain_device *dev, int lock)
1301 {
1302         unsigned long flags = 0;
1303         int res = 0;
1304         struct mvs_info *mvi = NULL;
1305         struct domain_device *parent_dev = dev->parent;
1306         struct mvs_device *mvi_device;
1307
1308         mvi = mvs_find_dev_mvi(dev);
1309
1310         if (lock)
1311                 spin_lock_irqsave(&mvi->lock, flags);
1312
1313         mvi_device = mvs_alloc_dev(mvi);
1314         if (!mvi_device) {
1315                 res = -1;
1316                 goto found_out;
1317         }
1318         dev->lldd_dev = mvi_device;
1319         mvi_device->dev_type = dev->dev_type;
1320         mvi_device->mvi_info = mvi;
1321         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
1322                 int phy_id;
1323                 u8 phy_num = parent_dev->ex_dev.num_phys;
1324                 struct ex_phy *phy;
1325                 for (phy_id = 0; phy_id < phy_num; phy_id++) {
1326                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
1327                         if (SAS_ADDR(phy->attached_sas_addr) ==
1328                                 SAS_ADDR(dev->sas_addr)) {
1329                                 mvi_device->attached_phy = phy_id;
1330                                 break;
1331                         }
1332                 }
1333
1334                 if (phy_id == phy_num) {
1335                         mv_printk("Error: no attached dev:%016llx"
1336                                 "at ex:%016llx.\n",
1337                                 SAS_ADDR(dev->sas_addr),
1338                                 SAS_ADDR(parent_dev->sas_addr));
1339                         res = -1;
1340                 }
1341         }
1342
1343 found_out:
1344         if (lock)
1345                 spin_unlock_irqrestore(&mvi->lock, flags);
1346         return res;
1347 }
1348
1349 int mvs_dev_found(struct domain_device *dev)
1350 {
1351         return mvs_dev_found_notify(dev, 1);
1352 }
1353
1354 void mvs_dev_gone_notify(struct domain_device *dev, int lock)
1355 {
1356         unsigned long flags = 0;
1357         struct mvs_device *mvi_dev = dev->lldd_dev;
1358         struct mvs_info *mvi = mvi_dev->mvi_info;
1359
1360         if (lock)
1361                 spin_lock_irqsave(&mvi->lock, flags);
1362
1363         if (mvi_dev) {
1364                 mv_dprintk("found dev[%d:%x] is gone.\n",
1365                         mvi_dev->device_id, mvi_dev->dev_type);
1366                 mvs_free_reg_set(mvi, mvi_dev);
1367                 mvs_free_dev(mvi_dev);
1368         } else {
1369                 mv_dprintk("found dev has gone.\n");
1370         }
1371         dev->lldd_dev = NULL;
1372
1373         if (lock)
1374                 spin_unlock_irqrestore(&mvi->lock, flags);
1375 }
1376
1377
1378 void mvs_dev_gone(struct domain_device *dev)
1379 {
1380         mvs_dev_gone_notify(dev, 1);
1381 }
1382
1383 static  struct sas_task *mvs_alloc_task(void)
1384 {
1385         struct sas_task *task = kzalloc(sizeof(struct sas_task), GFP_KERNEL);
1386
1387         if (task) {
1388                 INIT_LIST_HEAD(&task->list);
1389                 spin_lock_init(&task->task_state_lock);
1390                 task->task_state_flags = SAS_TASK_STATE_PENDING;
1391                 init_timer(&task->timer);
1392                 init_completion(&task->completion);
1393         }
1394         return task;
1395 }
1396
1397 static  void mvs_free_task(struct sas_task *task)
1398 {
1399         if (task) {
1400                 BUG_ON(!list_empty(&task->list));
1401                 kfree(task);
1402         }
1403 }
1404
1405 static void mvs_task_done(struct sas_task *task)
1406 {
1407         if (!del_timer(&task->timer))
1408                 return;
1409         complete(&task->completion);
1410 }
1411
1412 static void mvs_tmf_timedout(unsigned long data)
1413 {
1414         struct sas_task *task = (struct sas_task *)data;
1415
1416         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1417         complete(&task->completion);
1418 }
1419
1420 /* XXX */
1421 #define MVS_TASK_TIMEOUT 20
1422 static int mvs_exec_internal_tmf_task(struct domain_device *dev,
1423                         void *parameter, u32 para_len, struct mvs_tmf_task *tmf)
1424 {
1425         int res, retry;
1426         struct sas_task *task = NULL;
1427
1428         for (retry = 0; retry < 3; retry++) {
1429                 task = mvs_alloc_task();
1430                 if (!task)
1431                         return -ENOMEM;
1432
1433                 task->dev = dev;
1434                 task->task_proto = dev->tproto;
1435
1436                 memcpy(&task->ssp_task, parameter, para_len);
1437                 task->task_done = mvs_task_done;
1438
1439                 task->timer.data = (unsigned long) task;
1440                 task->timer.function = mvs_tmf_timedout;
1441                 task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ;
1442                 add_timer(&task->timer);
1443
1444                 res = mvs_task_exec(task, 1, GFP_KERNEL, NULL, 1, tmf);
1445
1446                 if (res) {
1447                         del_timer(&task->timer);
1448                         mv_printk("executing internel task failed:%d\n", res);
1449                         goto ex_err;
1450                 }
1451
1452                 wait_for_completion(&task->completion);
1453                 res = -TMF_RESP_FUNC_FAILED;
1454                 /* Even TMF timed out, return direct. */
1455                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1456                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1457                                 mv_printk("TMF task[%x] timeout.\n", tmf->tmf);
1458                                 goto ex_err;
1459                         }
1460                 }
1461
1462                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1463                     task->task_status.stat == SAM_GOOD) {
1464                         res = TMF_RESP_FUNC_COMPLETE;
1465                         break;
1466                 }
1467
1468                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1469                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1470                         /* no error, but return the number of bytes of
1471                          * underrun */
1472                         res = task->task_status.residual;
1473                         break;
1474                 }
1475
1476                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1477                       task->task_status.stat == SAS_DATA_OVERRUN) {
1478                         mv_dprintk("blocked task error.\n");
1479                         res = -EMSGSIZE;
1480                         break;
1481                 } else {
1482                         mv_dprintk(" task to dev %016llx response: 0x%x "
1483                                     "status 0x%x\n",
1484                                     SAS_ADDR(dev->sas_addr),
1485                                     task->task_status.resp,
1486                                     task->task_status.stat);
1487                         mvs_free_task(task);
1488                         task = NULL;
1489
1490                 }
1491         }
1492 ex_err:
1493         BUG_ON(retry == 3 && task != NULL);
1494         if (task != NULL)
1495                 mvs_free_task(task);
1496         return res;
1497 }
1498
1499 static int mvs_debug_issue_ssp_tmf(struct domain_device *dev,
1500                                 u8 *lun, struct mvs_tmf_task *tmf)
1501 {
1502         struct sas_ssp_task ssp_task;
1503         DECLARE_COMPLETION_ONSTACK(completion);
1504         if (!(dev->tproto & SAS_PROTOCOL_SSP))
1505                 return TMF_RESP_FUNC_ESUPP;
1506
1507         strncpy((u8 *)&ssp_task.LUN, lun, 8);
1508
1509         return mvs_exec_internal_tmf_task(dev, &ssp_task,
1510                                 sizeof(ssp_task), tmf);
1511 }
1512
1513
1514 /*  Standard mandates link reset for ATA  (type 0)
1515     and hard reset for SSP (type 1) , only for RECOVERY */
1516 static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
1517 {
1518         int rc;
1519         struct sas_phy *phy = sas_find_local_phy(dev);
1520         int reset_type = (dev->dev_type == SATA_DEV ||
1521                         (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1522         rc = sas_phy_reset(phy, reset_type);
1523         msleep(2000);
1524         return rc;
1525 }
1526
1527 /* mandatory SAM-3 */
1528 int mvs_lu_reset(struct domain_device *dev, u8 *lun)
1529 {
1530         unsigned long flags;
1531         int i, phyno[WIDE_PORT_MAX_PHY], num , rc = TMF_RESP_FUNC_FAILED;
1532         struct mvs_tmf_task tmf_task;
1533         struct mvs_device * mvi_dev = dev->lldd_dev;
1534         struct mvs_info *mvi = mvi_dev->mvi_info;
1535
1536         tmf_task.tmf = TMF_LU_RESET;
1537         mvi_dev->dev_status = MVS_DEV_EH;
1538         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1539         if (rc == TMF_RESP_FUNC_COMPLETE) {
1540                 num = mvs_find_dev_phyno(dev, phyno);
1541                 spin_lock_irqsave(&mvi->lock, flags);
1542                 for (i = 0; i < num; i++)
1543                         mvs_release_task(mvi, phyno[i], dev);
1544                 spin_unlock_irqrestore(&mvi->lock, flags);
1545         }
1546         /* If failed, fall-through I_T_Nexus reset */
1547         mv_printk("%s for device[%x]:rc= %d\n", __func__,
1548                         mvi_dev->device_id, rc);
1549         return rc;
1550 }
1551
1552 int mvs_I_T_nexus_reset(struct domain_device *dev)
1553 {
1554         unsigned long flags;
1555         int i, phyno[WIDE_PORT_MAX_PHY], num , rc = TMF_RESP_FUNC_FAILED;
1556         struct mvs_device * mvi_dev = (struct mvs_device *)dev->lldd_dev;
1557         struct mvs_info *mvi = mvi_dev->mvi_info;
1558
1559         if (mvi_dev->dev_status != MVS_DEV_EH)
1560                 return TMF_RESP_FUNC_COMPLETE;
1561         rc = mvs_debug_I_T_nexus_reset(dev);
1562         mv_printk("%s for device[%x]:rc= %d\n",
1563                 __func__, mvi_dev->device_id, rc);
1564
1565         /* housekeeper */
1566         num = mvs_find_dev_phyno(dev, phyno);
1567         spin_lock_irqsave(&mvi->lock, flags);
1568         for (i = 0; i < num; i++)
1569                 mvs_release_task(mvi, phyno[i], dev);
1570         spin_unlock_irqrestore(&mvi->lock, flags);
1571
1572         return rc;
1573 }
1574 /* optional SAM-3 */
1575 int mvs_query_task(struct sas_task *task)
1576 {
1577         u32 tag;
1578         struct scsi_lun lun;
1579         struct mvs_tmf_task tmf_task;
1580         int rc = TMF_RESP_FUNC_FAILED;
1581
1582         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1583                 struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1584                 struct domain_device *dev = task->dev;
1585                 struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1586                 struct mvs_info *mvi = mvi_dev->mvi_info;
1587
1588                 int_to_scsilun(cmnd->device->lun, &lun);
1589                 rc = mvs_find_tag(mvi, task, &tag);
1590                 if (rc == 0) {
1591                         rc = TMF_RESP_FUNC_FAILED;
1592                         return rc;
1593                 }
1594
1595                 tmf_task.tmf = TMF_QUERY_TASK;
1596                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1597
1598                 rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1599                 switch (rc) {
1600                 /* The task is still in Lun, release it then */
1601                 case TMF_RESP_FUNC_SUCC:
1602                 /* The task is not in Lun or failed, reset the phy */
1603                 case TMF_RESP_FUNC_FAILED:
1604                 case TMF_RESP_FUNC_COMPLETE:
1605                         break;
1606                 }
1607         }
1608         mv_printk("%s:rc= %d\n", __func__, rc);
1609         return rc;
1610 }
1611
1612 /*  mandatory SAM-3, still need free task/slot info */
1613 int mvs_abort_task(struct sas_task *task)
1614 {
1615         struct scsi_lun lun;
1616         struct mvs_tmf_task tmf_task;
1617         struct domain_device *dev = task->dev;
1618         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1619         struct mvs_info *mvi = mvi_dev->mvi_info;
1620         int rc = TMF_RESP_FUNC_FAILED;
1621         unsigned long flags;
1622         u32 tag;
1623
1624         if (mvi->exp_req)
1625                 mvi->exp_req--;
1626         spin_lock_irqsave(&task->task_state_lock, flags);
1627         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1628                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1629                 rc = TMF_RESP_FUNC_COMPLETE;
1630                 goto out;
1631         }
1632         spin_unlock_irqrestore(&task->task_state_lock, flags);
1633         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1634                 struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1635
1636                 int_to_scsilun(cmnd->device->lun, &lun);
1637                 rc = mvs_find_tag(mvi, task, &tag);
1638                 if (rc == 0) {
1639                         mv_printk("No such tag in %s\n", __func__);
1640                         rc = TMF_RESP_FUNC_FAILED;
1641                         return rc;
1642                 }
1643
1644                 tmf_task.tmf = TMF_ABORT_TASK;
1645                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1646
1647                 rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1648
1649                 /* if successful, clear the task and callback forwards.*/
1650                 if (rc == TMF_RESP_FUNC_COMPLETE) {
1651                         u32 slot_no;
1652                         struct mvs_slot_info *slot;
1653
1654                         if (task->lldd_task) {
1655                                 slot = task->lldd_task;
1656                                 slot_no = (u32) (slot - mvi->slot_info);
1657                                 mvs_slot_complete(mvi, slot_no, 1);
1658                         }
1659                 }
1660         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1661                 task->task_proto & SAS_PROTOCOL_STP) {
1662                 /* to do free register_set */
1663         } else {
1664                 /* SMP */
1665
1666         }
1667 out:
1668         if (rc != TMF_RESP_FUNC_COMPLETE)
1669                 mv_printk("%s:rc= %d\n", __func__, rc);
1670         return rc;
1671 }
1672
1673 int mvs_abort_task_set(struct domain_device *dev, u8 *lun)
1674 {
1675         int rc = TMF_RESP_FUNC_FAILED;
1676         struct mvs_tmf_task tmf_task;
1677
1678         tmf_task.tmf = TMF_ABORT_TASK_SET;
1679         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1680
1681         return rc;
1682 }
1683
1684 int mvs_clear_aca(struct domain_device *dev, u8 *lun)
1685 {
1686         int rc = TMF_RESP_FUNC_FAILED;
1687         struct mvs_tmf_task tmf_task;
1688
1689         tmf_task.tmf = TMF_CLEAR_ACA;
1690         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1691
1692         return rc;
1693 }
1694
1695 int mvs_clear_task_set(struct domain_device *dev, u8 *lun)
1696 {
1697         int rc = TMF_RESP_FUNC_FAILED;
1698         struct mvs_tmf_task tmf_task;
1699
1700         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1701         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1702
1703         return rc;
1704 }
1705
1706 static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
1707                         u32 slot_idx, int err)
1708 {
1709         struct mvs_device *mvi_dev = task->dev->lldd_dev;
1710         struct task_status_struct *tstat = &task->task_status;
1711         struct ata_task_resp *resp = (struct ata_task_resp *)tstat->buf;
1712         int stat = SAM_GOOD;
1713
1714
1715         resp->frame_len = sizeof(struct dev_to_host_fis);
1716         memcpy(&resp->ending_fis[0],
1717                SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset),
1718                sizeof(struct dev_to_host_fis));
1719         tstat->buf_valid_size = sizeof(*resp);
1720         if (unlikely(err))
1721                 stat = SAS_PROTO_RESPONSE;
1722         return stat;
1723 }
1724
1725 static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task,
1726                          u32 slot_idx)
1727 {
1728         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1729         int stat;
1730         u32 err_dw0 = le32_to_cpu(*(u32 *) (slot->response));
1731         u32 tfs = 0;
1732         enum mvs_port_type type = PORT_TYPE_SAS;
1733
1734         if (err_dw0 & CMD_ISS_STPD)
1735                 MVS_CHIP_DISP->issue_stop(mvi, type, tfs);
1736
1737         MVS_CHIP_DISP->command_active(mvi, slot_idx);
1738
1739         stat = SAM_CHECK_COND;
1740         switch (task->task_proto) {
1741         case SAS_PROTOCOL_SSP:
1742                 stat = SAS_ABORTED_TASK;
1743                 break;
1744         case SAS_PROTOCOL_SMP:
1745                 stat = SAM_CHECK_COND;
1746                 break;
1747
1748         case SAS_PROTOCOL_SATA:
1749         case SAS_PROTOCOL_STP:
1750         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
1751         {
1752                 if (err_dw0 == 0x80400002)
1753                         mv_printk("find reserved error, why?\n");
1754
1755                 task->ata_task.use_ncq = 0;
1756                 stat = SAS_PROTO_RESPONSE;
1757                 mvs_sata_done(mvi, task, slot_idx, 1);
1758
1759         }
1760                 break;
1761         default:
1762                 break;
1763         }
1764
1765         return stat;
1766 }
1767
1768 int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
1769 {
1770         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1771         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1772         struct sas_task *task = slot->task;
1773         struct mvs_device *mvi_dev = NULL;
1774         struct task_status_struct *tstat;
1775
1776         bool aborted;
1777         void *to;
1778         enum exec_status sts;
1779
1780         if (mvi->exp_req)
1781                 mvi->exp_req--;
1782         if (unlikely(!task || !task->lldd_task))
1783                 return -1;
1784
1785         tstat = &task->task_status;
1786         mvi_dev = task->dev->lldd_dev;
1787
1788         mvs_hba_cq_dump(mvi);
1789
1790         spin_lock(&task->task_state_lock);
1791         task->task_state_flags &=
1792                 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1793         task->task_state_flags |= SAS_TASK_STATE_DONE;
1794         /* race condition*/
1795         aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED;
1796         spin_unlock(&task->task_state_lock);
1797
1798         memset(tstat, 0, sizeof(*tstat));
1799         tstat->resp = SAS_TASK_COMPLETE;
1800
1801         if (unlikely(aborted)) {
1802                 tstat->stat = SAS_ABORTED_TASK;
1803                 if (mvi_dev)
1804                         mvi_dev->runing_req--;
1805                 if (sas_protocol_ata(task->task_proto))
1806                         mvs_free_reg_set(mvi, mvi_dev);
1807
1808                 mvs_slot_task_free(mvi, task, slot, slot_idx);
1809                 return -1;
1810         }
1811
1812         if (unlikely(!mvi_dev || !slot->port->port_attached || flags)) {
1813                 mv_dprintk("port has not device.\n");
1814                 tstat->stat = SAS_PHY_DOWN;
1815                 goto out;
1816         }
1817
1818         /*
1819         if (unlikely((rx_desc & RXQ_ERR) || (*(u64 *) slot->response))) {
1820                  mv_dprintk("Find device[%016llx] RXQ_ERR %X,
1821                  err info:%016llx\n",
1822                  SAS_ADDR(task->dev->sas_addr),
1823                  rx_desc, (u64)(*(u64 *) slot->response));
1824         }
1825         */
1826
1827         /* error info record present */
1828         if (unlikely((rx_desc & RXQ_ERR) && (*(u64 *) slot->response))) {
1829                 tstat->stat = mvs_slot_err(mvi, task, slot_idx);
1830                 goto out;
1831         }
1832
1833         switch (task->task_proto) {
1834         case SAS_PROTOCOL_SSP:
1835                 /* hw says status == 0, datapres == 0 */
1836                 if (rx_desc & RXQ_GOOD) {
1837                         tstat->stat = SAM_GOOD;
1838                         tstat->resp = SAS_TASK_COMPLETE;
1839                 }
1840                 /* response frame present */
1841                 else if (rx_desc & RXQ_RSP) {
1842                         struct ssp_response_iu *iu = slot->response +
1843                                                 sizeof(struct mvs_err_info);
1844                         sas_ssp_task_response(mvi->dev, task, iu);
1845                 } else
1846                         tstat->stat = SAM_CHECK_COND;
1847                 break;
1848
1849         case SAS_PROTOCOL_SMP: {
1850                         struct scatterlist *sg_resp = &task->smp_task.smp_resp;
1851                         tstat->stat = SAM_GOOD;
1852                         to = kmap_atomic(sg_page(sg_resp), KM_IRQ0);
1853                         memcpy(to + sg_resp->offset,
1854                                 slot->response + sizeof(struct mvs_err_info),
1855                                 sg_dma_len(sg_resp));
1856                         kunmap_atomic(to, KM_IRQ0);
1857                         break;
1858                 }
1859
1860         case SAS_PROTOCOL_SATA:
1861         case SAS_PROTOCOL_STP:
1862         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: {
1863                         tstat->stat = mvs_sata_done(mvi, task, slot_idx, 0);
1864                         break;
1865                 }
1866
1867         default:
1868                 tstat->stat = SAM_CHECK_COND;
1869                 break;
1870         }
1871
1872 out:
1873         if (mvi_dev) {
1874                 mvi_dev->runing_req--;
1875                 if (sas_protocol_ata(task->task_proto))
1876                         mvs_free_reg_set(mvi, mvi_dev);
1877         }
1878         mvs_slot_task_free(mvi, task, slot, slot_idx);
1879         sts = tstat->stat;
1880
1881         spin_unlock(&mvi->lock);
1882         if (task->task_done)
1883                 task->task_done(task);
1884         else
1885                 mv_dprintk("why has not task_done.\n");
1886         spin_lock(&mvi->lock);
1887
1888         return sts;
1889 }
1890
1891 void mvs_release_task(struct mvs_info *mvi,
1892                 int phy_no, struct domain_device *dev)
1893 {
1894         int i = 0; u32 slot_idx;
1895         struct mvs_phy *phy;
1896         struct mvs_port *port;
1897         struct mvs_slot_info *slot, *slot2;
1898
1899         phy = &mvi->phy[phy_no];
1900         port = phy->port;
1901         if (!port)
1902                 return;
1903
1904         list_for_each_entry_safe(slot, slot2, &port->list, entry) {
1905                 struct sas_task *task;
1906                 slot_idx = (u32) (slot - mvi->slot_info);
1907                 task = slot->task;
1908
1909                 if (dev && task->dev != dev)
1910                         continue;
1911
1912                 mv_printk("Release slot [%x] tag[%x], task [%p]:\n",
1913                         slot_idx, slot->slot_tag, task);
1914
1915                 if (task->task_proto & SAS_PROTOCOL_SSP) {
1916                         mv_printk("attached with SSP task CDB[");
1917                         for (i = 0; i < 16; i++)
1918                                 mv_printk(" %02x", task->ssp_task.cdb[i]);
1919                         mv_printk(" ]\n");
1920                 }
1921
1922                 mvs_slot_complete(mvi, slot_idx, 1);
1923         }
1924 }
1925
1926 static void mvs_phy_disconnected(struct mvs_phy *phy)
1927 {
1928         phy->phy_attached = 0;
1929         phy->att_dev_info = 0;
1930         phy->att_dev_sas_addr = 0;
1931 }
1932
1933 static void mvs_work_queue(struct work_struct *work)
1934 {
1935         struct delayed_work *dw = container_of(work, struct delayed_work, work);
1936         struct mvs_wq *mwq = container_of(dw, struct mvs_wq, work_q);
1937         struct mvs_info *mvi = mwq->mvi;
1938         unsigned long flags;
1939
1940         spin_lock_irqsave(&mvi->lock, flags);
1941         if (mwq->handler & PHY_PLUG_EVENT) {
1942                 u32 phy_no = (unsigned long) mwq->data;
1943                 struct sas_ha_struct *sas_ha = mvi->sas;
1944                 struct mvs_phy *phy = &mvi->phy[phy_no];
1945                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1946
1947                 if (phy->phy_event & PHY_PLUG_OUT) {
1948                         u32 tmp;
1949                         struct sas_identify_frame *id;
1950                         id = (struct sas_identify_frame *)phy->frame_rcvd;
1951                         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no);
1952                         phy->phy_event &= ~PHY_PLUG_OUT;
1953                         if (!(tmp & PHY_READY_MASK)) {
1954                                 sas_phy_disconnected(sas_phy);
1955                                 mvs_phy_disconnected(phy);
1956                                 sas_ha->notify_phy_event(sas_phy,
1957                                         PHYE_LOSS_OF_SIGNAL);
1958                                 mv_dprintk("phy%d Removed Device\n", phy_no);
1959                         } else {
1960                                 MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1961                                 mvs_update_phyinfo(mvi, phy_no, 1);
1962                                 mvs_bytes_dmaed(mvi, phy_no);
1963                                 mvs_port_notify_formed(sas_phy, 0);
1964                                 mv_dprintk("phy%d Attached Device\n", phy_no);
1965                         }
1966                 }
1967         }
1968         list_del(&mwq->entry);
1969         spin_unlock_irqrestore(&mvi->lock, flags);
1970         kfree(mwq);
1971 }
1972
1973 static int mvs_handle_event(struct mvs_info *mvi, void *data, int handler)
1974 {
1975         struct mvs_wq *mwq;
1976         int ret = 0;
1977
1978         mwq = kmalloc(sizeof(struct mvs_wq), GFP_ATOMIC);
1979         if (mwq) {
1980                 mwq->mvi = mvi;
1981                 mwq->data = data;
1982                 mwq->handler = handler;
1983                 MV_INIT_DELAYED_WORK(&mwq->work_q, mvs_work_queue, mwq);
1984                 list_add_tail(&mwq->entry, &mvi->wq_list);
1985                 schedule_delayed_work(&mwq->work_q, HZ * 2);
1986         } else
1987                 ret = -ENOMEM;
1988
1989         return ret;
1990 }
1991
1992 static void mvs_sig_time_out(unsigned long tphy)
1993 {
1994         struct mvs_phy *phy = (struct mvs_phy *)tphy;
1995         struct mvs_info *mvi = phy->mvi;
1996         u8 phy_no;
1997
1998         for (phy_no = 0; phy_no < mvi->chip->n_phy; phy_no++) {
1999                 if (&mvi->phy[phy_no] == phy) {
2000                         mv_dprintk("Get signature time out, reset phy %d\n",
2001                                 phy_no+mvi->id*mvi->chip->n_phy);
2002                         MVS_CHIP_DISP->phy_reset(mvi, phy_no, 1);
2003                 }
2004         }
2005 }
2006
2007 static void mvs_sig_remove_timer(struct mvs_phy *phy)
2008 {
2009         if (phy->timer.function)
2010                 del_timer(&phy->timer);
2011         phy->timer.function = NULL;
2012 }
2013
2014 void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
2015 {
2016         u32 tmp;
2017         struct sas_ha_struct *sas_ha = mvi->sas;
2018         struct mvs_phy *phy = &mvi->phy[phy_no];
2019         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2020
2021         phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, phy_no);
2022         mv_dprintk("port %d ctrl sts=0x%X.\n", phy_no+mvi->id*mvi->chip->n_phy,
2023                 MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no));
2024         mv_dprintk("Port %d irq sts = 0x%X\n", phy_no+mvi->id*mvi->chip->n_phy,
2025                 phy->irq_status);
2026
2027         /*
2028         * events is port event now ,
2029         * we need check the interrupt status which belongs to per port.
2030         */
2031
2032         if (phy->irq_status & PHYEV_DCDR_ERR)
2033                 mv_dprintk("port %d STP decoding error.\n",
2034                 phy_no+mvi->id*mvi->chip->n_phy);
2035
2036         if (phy->irq_status & PHYEV_POOF) {
2037                 if (!(phy->phy_event & PHY_PLUG_OUT)) {
2038                         int dev_sata = phy->phy_type & PORT_TYPE_SATA;
2039                         int ready;
2040                         mvs_release_task(mvi, phy_no, NULL);
2041                         phy->phy_event |= PHY_PLUG_OUT;
2042                         mvs_handle_event(mvi,
2043                                 (void *)(unsigned long)phy_no,
2044                                 PHY_PLUG_EVENT);
2045                         ready = mvs_is_phy_ready(mvi, phy_no);
2046                         if (!ready)
2047                                 mv_dprintk("phy%d Unplug Notice\n",
2048                                         phy_no +
2049                                         mvi->id * mvi->chip->n_phy);
2050                         if (ready || dev_sata) {
2051                                 if (MVS_CHIP_DISP->stp_reset)
2052                                         MVS_CHIP_DISP->stp_reset(mvi,
2053                                                         phy_no);
2054                                 else
2055                                         MVS_CHIP_DISP->phy_reset(mvi,
2056                                                         phy_no, 0);
2057                                 return;
2058                         }
2059                 }
2060         }
2061
2062         if (phy->irq_status & PHYEV_COMWAKE) {
2063                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, phy_no);
2064                 MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
2065                                         tmp | PHYEV_SIG_FIS);
2066                 if (phy->timer.function == NULL) {
2067                         phy->timer.data = (unsigned long)phy;
2068                         phy->timer.function = mvs_sig_time_out;
2069                         phy->timer.expires = jiffies + 10*HZ;
2070                         add_timer(&phy->timer);
2071                 }
2072         }
2073         if (phy->irq_status & (PHYEV_SIG_FIS | PHYEV_ID_DONE)) {
2074                 phy->phy_status = mvs_is_phy_ready(mvi, phy_no);
2075                 mvs_sig_remove_timer(phy);
2076                 mv_dprintk("notify plug in on phy[%d]\n", phy_no);
2077                 if (phy->phy_status) {
2078                         mdelay(10);
2079                         MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
2080                         if (phy->phy_type & PORT_TYPE_SATA) {
2081                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(
2082                                                 mvi, phy_no);
2083                                 tmp &= ~PHYEV_SIG_FIS;
2084                                 MVS_CHIP_DISP->write_port_irq_mask(mvi,
2085                                                         phy_no, tmp);
2086                         }
2087                         mvs_update_phyinfo(mvi, phy_no, 0);
2088                         mvs_bytes_dmaed(mvi, phy_no);
2089                         /* whether driver is going to handle hot plug */
2090                         if (phy->phy_event & PHY_PLUG_OUT) {
2091                                 mvs_port_notify_formed(sas_phy, 0);
2092                                 phy->phy_event &= ~PHY_PLUG_OUT;
2093                         }
2094                 } else {
2095                         mv_dprintk("plugin interrupt but phy%d is gone\n",
2096                                 phy_no + mvi->id*mvi->chip->n_phy);
2097                 }
2098         } else if (phy->irq_status & PHYEV_BROAD_CH) {
2099                 mv_dprintk("port %d broadcast change.\n",
2100                         phy_no + mvi->id*mvi->chip->n_phy);
2101                 /* exception for Samsung disk drive*/
2102                 mdelay(1000);
2103                 sas_ha->notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
2104         }
2105         MVS_CHIP_DISP->write_port_irq_stat(mvi, phy_no, phy->irq_status);
2106 }
2107
2108 int mvs_int_rx(struct mvs_info *mvi, bool self_clear)
2109 {
2110         u32 rx_prod_idx, rx_desc;
2111         bool attn = false;
2112
2113         /* the first dword in the RX ring is special: it contains
2114          * a mirror of the hardware's RX producer index, so that
2115          * we don't have to stall the CPU reading that register.
2116          * The actual RX ring is offset by one dword, due to this.
2117          */
2118         rx_prod_idx = mvi->rx_cons;
2119         mvi->rx_cons = le32_to_cpu(mvi->rx[0]);
2120         if (mvi->rx_cons == 0xfff)      /* h/w hasn't touched RX ring yet */
2121                 return 0;
2122
2123         /* The CMPL_Q may come late, read from register and try again
2124         * note: if coalescing is enabled,
2125         * it will need to read from register every time for sure
2126         */
2127         if (unlikely(mvi->rx_cons == rx_prod_idx))
2128                 mvi->rx_cons = MVS_CHIP_DISP->rx_update(mvi) & RX_RING_SZ_MASK;
2129
2130         if (mvi->rx_cons == rx_prod_idx)
2131                 return 0;
2132
2133         while (mvi->rx_cons != rx_prod_idx) {
2134                 /* increment our internal RX consumer pointer */
2135                 rx_prod_idx = (rx_prod_idx + 1) & (MVS_RX_RING_SZ - 1);
2136                 rx_desc = le32_to_cpu(mvi->rx[rx_prod_idx + 1]);
2137
2138                 if (likely(rx_desc & RXQ_DONE))
2139                         mvs_slot_complete(mvi, rx_desc, 0);
2140                 if (rx_desc & RXQ_ATTN) {
2141                         attn = true;
2142                 } else if (rx_desc & RXQ_ERR) {
2143                         if (!(rx_desc & RXQ_DONE))
2144                                 mvs_slot_complete(mvi, rx_desc, 0);
2145                 } else if (rx_desc & RXQ_SLOT_RESET) {
2146                         mvs_slot_free(mvi, rx_desc);
2147                 }
2148         }
2149
2150         if (attn && self_clear)
2151                 MVS_CHIP_DISP->int_full(mvi);
2152         return 0;
2153 }
2154