Pileus Git - ~andy/linux/blob - drivers/scsi/mpt2sas/mpt2sas_transport.c

   1 /*
   2  * SAS Transport Layer for MPT (Message Passing Technology) based controllers
   3  *
   4  * This code is based on drivers/scsi/mpt2sas/mpt2_transport.c
   5  * Copyright (C) 2007-2009  LSI Corporation
   6  *  (mailto:DL-MPTFusionLinux@lsi.com)
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * NO WARRANTY
  19  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  20  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  21  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  22  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  23  * solely responsible for determining the appropriateness of using and
  24  * distributing the Program and assumes all risks associated with its
  25  * exercise of rights under this Agreement, including but not limited to
  26  * the risks and costs of program errors, damage to or loss of data,
  27  * programs or equipment, and unavailability or interruption of operations.
  28
  29  * DISCLAIMER OF LIABILITY
  30  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  31  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  33  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  35  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  36  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  37
  38  * You should have received a copy of the GNU General Public License
  39  * along with this program; if not, write to the Free Software
  40  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  41  * USA.
  42  */
  43
  44 #include <linux/module.h>
  45 #include <linux/kernel.h>
  46 #include <linux/init.h>
  47 #include <linux/errno.h>
  48 #include <linux/sched.h>
  49 #include <linux/workqueue.h>
  50 #include <linux/delay.h>
  51 #include <linux/pci.h>
  52
  53 #include <scsi/scsi.h>
  54 #include <scsi/scsi_cmnd.h>
  55 #include <scsi/scsi_device.h>
  56 #include <scsi/scsi_host.h>
  57 #include <scsi/scsi_transport_sas.h>
  58 #include <scsi/scsi_dbg.h>
  59
  60 #include "mpt2sas_base.h"
  61 /**
  62  * _transport_sas_node_find_by_handle - sas node search
  63  * @ioc: per adapter object
  64  * @handle: expander or hba handle (assigned by firmware)
  65  * Context: Calling function should acquire ioc->sas_node_lock.
  66  *
  67  * Search for either hba phys or expander device based on handle, then returns
  68  * the sas_node object.
  69  */
  70 static struct _sas_node *
  71 _transport_sas_node_find_by_handle(struct MPT2SAS_ADAPTER *ioc, u16 handle)
  72 {
  73         int i;
  74
  75         for (i = 0; i < ioc->sas_hba.num_phys; i++)
  76                 if (ioc->sas_hba.phy[i].handle == handle)
  77                         return &ioc->sas_hba;
  78
  79         return mpt2sas_scsih_expander_find_by_handle(ioc, handle);
  80 }
  81
  82 /**
  83  * _transport_convert_phy_link_rate -
  84  * @link_rate: link rate returned from mpt firmware
  85  *
  86  * Convert link_rate from mpi fusion into sas_transport form.
  87  */
  88 static enum sas_linkrate
  89 _transport_convert_phy_link_rate(u8 link_rate)
  90 {
  91         enum sas_linkrate rc;
  92
  93         switch (link_rate) {
  94         case MPI2_SAS_NEG_LINK_RATE_1_5:
  95                 rc = SAS_LINK_RATE_1_5_GBPS;
  96                 break;
  97         case MPI2_SAS_NEG_LINK_RATE_3_0:
  98                 rc = SAS_LINK_RATE_3_0_GBPS;
  99                 break;
 100         case MPI2_SAS_NEG_LINK_RATE_6_0:
 101                 rc = SAS_LINK_RATE_6_0_GBPS;
 102                 break;
 103         case MPI2_SAS_NEG_LINK_RATE_PHY_DISABLED:
 104                 rc = SAS_PHY_DISABLED;
 105                 break;
 106         case MPI2_SAS_NEG_LINK_RATE_NEGOTIATION_FAILED:
 107                 rc = SAS_LINK_RATE_FAILED;
 108                 break;
 109         case MPI2_SAS_NEG_LINK_RATE_PORT_SELECTOR:
 110                 rc = SAS_SATA_PORT_SELECTOR;
 111                 break;
 112         case MPI2_SAS_NEG_LINK_RATE_SMP_RESET_IN_PROGRESS:
 113                 rc = SAS_PHY_RESET_IN_PROGRESS;
 114                 break;
 115         default:
 116         case MPI2_SAS_NEG_LINK_RATE_SATA_OOB_COMPLETE:
 117         case MPI2_SAS_NEG_LINK_RATE_UNKNOWN_LINK_RATE:
 118                 rc = SAS_LINK_RATE_UNKNOWN;
 119                 break;
 120         }
 121         return rc;
 122 }
 123
 124 /**
 125  * _transport_set_identify - set identify for phys and end devices
 126  * @ioc: per adapter object
 127  * @handle: device handle
 128  * @identify: sas identify info
 129  *
 130  * Populates sas identify info.
 131  *
 132  * Returns 0 for success, non-zero for failure.
 133  */
 134 static int
 135 _transport_set_identify(struct MPT2SAS_ADAPTER *ioc, u16 handle,
 136     struct sas_identify *identify)
 137 {
 138         Mpi2SasDevicePage0_t sas_device_pg0;
 139         Mpi2ConfigReply_t mpi_reply;
 140         u32 device_info;
 141         u32 ioc_status;
 142
 143         if (ioc->shost_recovery) {
 144                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
 145                     __func__, ioc->name);
 146                 return -EFAULT;
 147         }
 148
 149         if ((mpt2sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
 150             MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, handle))) {
 151                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 152
 153                     ioc->name, __FILE__, __LINE__, __func__);
 154                 return -ENXIO;
 155         }
 156
 157         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
 158             MPI2_IOCSTATUS_MASK;
 159         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
 160                 printk(MPT2SAS_ERR_FMT "handle(0x%04x), ioc_status(0x%04x)"
 161                     "\nfailure at %s:%d/%s()!\n", ioc->name, handle, ioc_status,
 162                      __FILE__, __LINE__, __func__);
 163                 return -EIO;
 164         }
 165
 166         memset(identify, 0, sizeof(identify));
 167         device_info = le32_to_cpu(sas_device_pg0.DeviceInfo);
 168
 169         /* sas_address */
 170         identify->sas_address = le64_to_cpu(sas_device_pg0.SASAddress);
 171
 172         /* device_type */
 173         switch (device_info & MPI2_SAS_DEVICE_INFO_MASK_DEVICE_TYPE) {
 174         case MPI2_SAS_DEVICE_INFO_NO_DEVICE:
 175                 identify->device_type = SAS_PHY_UNUSED;
 176                 break;
 177         case MPI2_SAS_DEVICE_INFO_END_DEVICE:
 178                 identify->device_type = SAS_END_DEVICE;
 179                 break;
 180         case MPI2_SAS_DEVICE_INFO_EDGE_EXPANDER:
 181                 identify->device_type = SAS_EDGE_EXPANDER_DEVICE;
 182                 break;
 183         case MPI2_SAS_DEVICE_INFO_FANOUT_EXPANDER:
 184                 identify->device_type = SAS_FANOUT_EXPANDER_DEVICE;
 185                 break;
 186         }
 187
 188         /* initiator_port_protocols */
 189         if (device_info & MPI2_SAS_DEVICE_INFO_SSP_INITIATOR)
 190                 identify->initiator_port_protocols |= SAS_PROTOCOL_SSP;
 191         if (device_info & MPI2_SAS_DEVICE_INFO_STP_INITIATOR)
 192                 identify->initiator_port_protocols |= SAS_PROTOCOL_STP;
 193         if (device_info & MPI2_SAS_DEVICE_INFO_SMP_INITIATOR)
 194                 identify->initiator_port_protocols |= SAS_PROTOCOL_SMP;
 195         if (device_info & MPI2_SAS_DEVICE_INFO_SATA_HOST)
 196                 identify->initiator_port_protocols |= SAS_PROTOCOL_SATA;
 197
 198         /* target_port_protocols */
 199         if (device_info & MPI2_SAS_DEVICE_INFO_SSP_TARGET)
 200                 identify->target_port_protocols |= SAS_PROTOCOL_SSP;
 201         if (device_info & MPI2_SAS_DEVICE_INFO_STP_TARGET)
 202                 identify->target_port_protocols |= SAS_PROTOCOL_STP;
 203         if (device_info & MPI2_SAS_DEVICE_INFO_SMP_TARGET)
 204                 identify->target_port_protocols |= SAS_PROTOCOL_SMP;
 205         if (device_info & MPI2_SAS_DEVICE_INFO_SATA_DEVICE)
 206                 identify->target_port_protocols |= SAS_PROTOCOL_SATA;
 207
 208         return 0;
 209 }
 210
 211 /**
 212  * mpt2sas_transport_done -  internal transport layer callback handler.
 213  * @ioc: per adapter object
 214  * @smid: system request message index
 215  * @msix_index: MSIX table index supplied by the OS
 216  * @reply: reply message frame(lower 32bit addr)
 217  *
 218  * Callback handler when sending internal generated transport cmds.
 219  * The callback index passed is `ioc->transport_cb_idx`
 220  *
 221  * Return 1 meaning mf should be freed from _base_interrupt
 222  *        0 means the mf is freed from this function.
 223  */
 224 u8
 225 mpt2sas_transport_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
 226     u32 reply)
 227 {
 228         MPI2DefaultReply_t *mpi_reply;
 229
 230         mpi_reply =  mpt2sas_base_get_reply_virt_addr(ioc, reply);
 231         if (ioc->transport_cmds.status == MPT2_CMD_NOT_USED)
 232                 return 1;
 233         if (ioc->transport_cmds.smid != smid)
 234                 return 1;
 235         ioc->transport_cmds.status |= MPT2_CMD_COMPLETE;
 236         if (mpi_reply) {
 237                 memcpy(ioc->transport_cmds.reply, mpi_reply,
 238                     mpi_reply->MsgLength*4);
 239                 ioc->transport_cmds.status |= MPT2_CMD_REPLY_VALID;
 240         }
 241         ioc->transport_cmds.status &= ~MPT2_CMD_PENDING;
 242         complete(&ioc->transport_cmds.done);
 243         return 1;
 244 }
 245
 246 /* report manufacture request structure */
 247 struct rep_manu_request{
 248         u8 smp_frame_type;
 249         u8 function;
 250         u8 reserved;
 251         u8 request_length;
 252 };
 253
 254 /* report manufacture reply structure */
 255 struct rep_manu_reply{
 256         u8 smp_frame_type; /* 0x41 */
 257         u8 function; /* 0x01 */
 258         u8 function_result;
 259         u8 response_length;
 260         u16 expander_change_count;
 261         u8 reserved0[2];
 262         u8 sas_format:1;
 263         u8 reserved1:7;
 264         u8 reserved2[3];
 265         u8 vendor_id[SAS_EXPANDER_VENDOR_ID_LEN];
 266         u8 product_id[SAS_EXPANDER_PRODUCT_ID_LEN];
 267         u8 product_rev[SAS_EXPANDER_PRODUCT_REV_LEN];
 268         u8 component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN];
 269         u16 component_id;
 270         u8 component_revision_id;
 271         u8 reserved3;
 272         u8 vendor_specific[8];
 273 };
 274
 275 /**
 276  * _transport_expander_report_manufacture - obtain SMP report_manufacture
 277  * @ioc: per adapter object
 278  * @sas_address: expander sas address
 279  * @edev: the sas_expander_device object
 280  *
 281  * Fills in the sas_expander_device object when SMP port is created.
 282  *
 283  * Returns 0 for success, non-zero for failure.
 284  */
 285 static int
 286 _transport_expander_report_manufacture(struct MPT2SAS_ADAPTER *ioc,
 287     u64 sas_address, struct sas_expander_device *edev)
 288 {
 289         Mpi2SmpPassthroughRequest_t *mpi_request;
 290         Mpi2SmpPassthroughReply_t *mpi_reply;
 291         struct rep_manu_reply *manufacture_reply;
 292         struct rep_manu_request *manufacture_request;
 293         int rc;
 294         u16 smid;
 295         u32 ioc_state;
 296         unsigned long timeleft;
 297         void *psge;
 298         u32 sgl_flags;
 299         u8 issue_reset = 0;
 300         void *data_out = NULL;
 301         dma_addr_t data_out_dma;
 302         u32 sz;
 303         u64 *sas_address_le;
 304         u16 wait_state_count;
 305
 306         if (ioc->shost_recovery) {
 307                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
 308                     __func__, ioc->name);
 309                 return -EFAULT;
 310         }
 311
 312         mutex_lock(&ioc->transport_cmds.mutex);
 313
 314         if (ioc->transport_cmds.status != MPT2_CMD_NOT_USED) {
 315                 printk(MPT2SAS_ERR_FMT "%s: transport_cmds in use\n",
 316                     ioc->name, __func__);
 317                 rc = -EAGAIN;
 318                 goto out;
 319         }
 320         ioc->transport_cmds.status = MPT2_CMD_PENDING;
 321
 322         wait_state_count = 0;
 323         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 324         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
 325                 if (wait_state_count++ == 10) {
 326                         printk(MPT2SAS_ERR_FMT
 327                             "%s: failed due to ioc not operational\n",
 328                             ioc->name, __func__);
 329                         rc = -EFAULT;
 330                         goto out;
 331                 }
 332                 ssleep(1);
 333                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 334                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
 335                     "operational state(count=%d)\n", ioc->name,
 336                     __func__, wait_state_count);
 337         }
 338         if (wait_state_count)
 339                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
 340                     ioc->name, __func__);
 341
 342         smid = mpt2sas_base_get_smid(ioc, ioc->transport_cb_idx);
 343         if (!smid) {
 344                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 345                     ioc->name, __func__);
 346                 rc = -EAGAIN;
 347                 goto out;
 348         }
 349
 350         rc = 0;
 351         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
 352         ioc->transport_cmds.smid = smid;
 353
 354         sz = sizeof(struct rep_manu_request) + sizeof(struct rep_manu_reply);
 355         data_out = pci_alloc_consistent(ioc->pdev, sz, &data_out_dma);
 356
 357         if (!data_out) {
 358                 printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 359                     __LINE__, __func__);
 360                 rc = -ENOMEM;
 361                 mpt2sas_base_free_smid(ioc, smid);
 362                 goto out;
 363         }
 364
 365         manufacture_request = data_out;
 366         manufacture_request->smp_frame_type = 0x40;
 367         manufacture_request->function = 1;
 368         manufacture_request->reserved = 0;
 369         manufacture_request->request_length = 0;
 370
 371         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
 372         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
 373         mpi_request->PhysicalPort = 0xFF;
 374         mpi_request->VF_ID = 0; /* TODO */
 375         mpi_request->VP_ID = 0;
 376         sas_address_le = (u64 *)&mpi_request->SASAddress;
 377         *sas_address_le = cpu_to_le64(sas_address);
 378         mpi_request->RequestDataLength = sizeof(struct rep_manu_request);
 379         psge = &mpi_request->SGL;
 380
 381         /* WRITE sgel first */
 382         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 383             MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
 384         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 385         ioc->base_add_sg_single(psge, sgl_flags |
 386             sizeof(struct rep_manu_request), data_out_dma);
 387
 388         /* incr sgel */
 389         psge += ioc->sge_size;
 390
 391         /* READ sgel last */
 392         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 393             MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 394             MPI2_SGE_FLAGS_END_OF_LIST);
 395         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 396         ioc->base_add_sg_single(psge, sgl_flags |
 397             sizeof(struct rep_manu_reply), data_out_dma +
 398             sizeof(struct rep_manu_request));
 399
 400         dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT "report_manufacture - "
 401             "send to sas_addr(0x%016llx)\n", ioc->name,
 402             (unsigned long long)sas_address));
 403         mpt2sas_base_put_smid_default(ioc, smid);
 404         init_completion(&ioc->transport_cmds.done);
 405         timeleft = wait_for_completion_timeout(&ioc->transport_cmds.done,
 406             10*HZ);
 407
 408         if (!(ioc->transport_cmds.status & MPT2_CMD_COMPLETE)) {
 409                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
 410                     ioc->name, __func__);
 411                 _debug_dump_mf(mpi_request,
 412                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
 413                 if (!(ioc->transport_cmds.status & MPT2_CMD_RESET))
 414                         issue_reset = 1;
 415                 goto issue_host_reset;
 416         }
 417
 418         dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT "report_manufacture - "
 419             "complete\n", ioc->name));
 420
 421         if (ioc->transport_cmds.status & MPT2_CMD_REPLY_VALID) {
 422                 u8 *tmp;
 423
 424                 mpi_reply = ioc->transport_cmds.reply;
 425
 426                 dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT
 427                     "report_manufacture - reply data transfer size(%d)\n",
 428                     ioc->name, le16_to_cpu(mpi_reply->ResponseDataLength)));
 429
 430                 if (le16_to_cpu(mpi_reply->ResponseDataLength) !=
 431                     sizeof(struct rep_manu_reply))
 432                         goto out;
 433
 434                 manufacture_reply = data_out + sizeof(struct rep_manu_request);
 435                 strncpy(edev->vendor_id, manufacture_reply->vendor_id,
 436                      SAS_EXPANDER_VENDOR_ID_LEN);
 437                 strncpy(edev->product_id, manufacture_reply->product_id,
 438                      SAS_EXPANDER_PRODUCT_ID_LEN);
 439                 strncpy(edev->product_rev, manufacture_reply->product_rev,
 440                      SAS_EXPANDER_PRODUCT_REV_LEN);
 441                 edev->level = manufacture_reply->sas_format;
 442                 if (manufacture_reply->sas_format) {
 443                         strncpy(edev->component_vendor_id,
 444                             manufacture_reply->component_vendor_id,
 445                              SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
 446                         tmp = (u8 *)&manufacture_reply->component_id;
 447                         edev->component_id = tmp[0] << 8 | tmp[1];
 448                         edev->component_revision_id =
 449                             manufacture_reply->component_revision_id;
 450                 }
 451         } else
 452                 dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT
 453                     "report_manufacture - no reply\n", ioc->name));
 454
 455  issue_host_reset:
 456         if (issue_reset)
 457                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 458                     FORCE_BIG_HAMMER);
 459  out:
 460         ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
 461         if (data_out)
 462                 pci_free_consistent(ioc->pdev, sz, data_out, data_out_dma);
 463
 464         mutex_unlock(&ioc->transport_cmds.mutex);
 465         return rc;
 466 }
 467
 468 /**
 469  * mpt2sas_transport_port_add - insert port to the list
 470  * @ioc: per adapter object
 471  * @handle: handle of attached device
 472  * @parent_handle: parent handle(either hba or expander)
 473  * Context: This function will acquire ioc->sas_node_lock.
 474  *
 475  * Adding new port object to the sas_node->sas_port_list.
 476  *
 477  * Returns mpt2sas_port.
 478  */
 479 struct _sas_port *
 480 mpt2sas_transport_port_add(struct MPT2SAS_ADAPTER *ioc, u16 handle,
 481     u16 parent_handle)
 482 {
 483         struct _sas_phy *mpt2sas_phy, *next;
 484         struct _sas_port *mpt2sas_port;
 485         unsigned long flags;
 486         struct _sas_node *sas_node;
 487         struct sas_rphy *rphy;
 488         int i;
 489         struct sas_port *port;
 490
 491         if (!parent_handle)
 492                 return NULL;
 493
 494         mpt2sas_port = kzalloc(sizeof(struct _sas_port),
 495             GFP_KERNEL);
 496         if (!mpt2sas_port) {
 497                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 498                     ioc->name, __FILE__, __LINE__, __func__);
 499                 return NULL;
 500         }
 501
 502         INIT_LIST_HEAD(&mpt2sas_port->port_list);
 503         INIT_LIST_HEAD(&mpt2sas_port->phy_list);
 504         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 505         sas_node = _transport_sas_node_find_by_handle(ioc, parent_handle);
 506         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 507
 508         if (!sas_node) {
 509                 printk(MPT2SAS_ERR_FMT "%s: Could not find parent(0x%04x)!\n",
 510                     ioc->name, __func__, parent_handle);
 511                 goto out_fail;
 512         }
 513
 514         mpt2sas_port->handle = parent_handle;
 515         mpt2sas_port->sas_address = sas_node->sas_address;
 516         if ((_transport_set_identify(ioc, handle,
 517             &mpt2sas_port->remote_identify))) {
 518                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 519                     ioc->name, __FILE__, __LINE__, __func__);
 520                 goto out_fail;
 521         }
 522
 523         if (mpt2sas_port->remote_identify.device_type == SAS_PHY_UNUSED) {
 524                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 525                     ioc->name, __FILE__, __LINE__, __func__);
 526                 goto out_fail;
 527         }
 528
 529         for (i = 0; i < sas_node->num_phys; i++) {
 530                 if (sas_node->phy[i].remote_identify.sas_address !=
 531                     mpt2sas_port->remote_identify.sas_address)
 532                         continue;
 533                 list_add_tail(&sas_node->phy[i].port_siblings,
 534                     &mpt2sas_port->phy_list);
 535                 mpt2sas_port->num_phys++;
 536         }
 537
 538         if (!mpt2sas_port->num_phys) {
 539                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 540                     ioc->name, __FILE__, __LINE__, __func__);
 541                 goto out_fail;
 542         }
 543
 544         port = sas_port_alloc_num(sas_node->parent_dev);
 545         if ((sas_port_add(port))) {
 546                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 547                     ioc->name, __FILE__, __LINE__, __func__);
 548                 goto out_fail;
 549         }
 550
 551         list_for_each_entry(mpt2sas_phy, &mpt2sas_port->phy_list,
 552             port_siblings) {
 553                 if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 554                         dev_printk(KERN_INFO, &port->dev, "add: handle(0x%04x)"
 555                             ", sas_addr(0x%016llx), phy(%d)\n", handle,
 556                             (unsigned long long)
 557                             mpt2sas_port->remote_identify.sas_address,
 558                             mpt2sas_phy->phy_id);
 559                 sas_port_add_phy(port, mpt2sas_phy->phy);
 560         }
 561
 562         mpt2sas_port->port = port;
 563         if (mpt2sas_port->remote_identify.device_type == SAS_END_DEVICE)
 564                 rphy = sas_end_device_alloc(port);
 565         else
 566                 rphy = sas_expander_alloc(port,
 567                     mpt2sas_port->remote_identify.device_type);
 568
 569         rphy->identify = mpt2sas_port->remote_identify;
 570         if ((sas_rphy_add(rphy))) {
 571                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 572                     ioc->name, __FILE__, __LINE__, __func__);
 573         }
 574         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 575                 dev_printk(KERN_INFO, &rphy->dev, "add: handle(0x%04x), "
 576                     "sas_addr(0x%016llx)\n", handle,
 577                     (unsigned long long)
 578                     mpt2sas_port->remote_identify.sas_address);
 579         mpt2sas_port->rphy = rphy;
 580         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 581         list_add_tail(&mpt2sas_port->port_list, &sas_node->sas_port_list);
 582         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 583
 584         /* fill in report manufacture */
 585         if (mpt2sas_port->remote_identify.device_type ==
 586             MPI2_SAS_DEVICE_INFO_EDGE_EXPANDER ||
 587             mpt2sas_port->remote_identify.device_type ==
 588             MPI2_SAS_DEVICE_INFO_FANOUT_EXPANDER)
 589                 _transport_expander_report_manufacture(ioc,
 590                     mpt2sas_port->remote_identify.sas_address,
 591                     rphy_to_expander_device(rphy));
 592
 593         return mpt2sas_port;
 594
 595  out_fail:
 596         list_for_each_entry_safe(mpt2sas_phy, next, &mpt2sas_port->phy_list,
 597             port_siblings)
 598                 list_del(&mpt2sas_phy->port_siblings);
 599         kfree(mpt2sas_port);
 600         return NULL;
 601 }
 602
 603 /**
 604  * mpt2sas_transport_port_remove - remove port from the list
 605  * @ioc: per adapter object
 606  * @sas_address: sas address of attached device
 607  * @parent_handle: handle to the upstream parent(either hba or expander)
 608  * Context: This function will acquire ioc->sas_node_lock.
 609  *
 610  * Removing object and freeing associated memory from the
 611  * ioc->sas_port_list.
 612  *
 613  * Return nothing.
 614  */
 615 void
 616 mpt2sas_transport_port_remove(struct MPT2SAS_ADAPTER *ioc, u64 sas_address,
 617     u16 parent_handle)
 618 {
 619         int i;
 620         unsigned long flags;
 621         struct _sas_port *mpt2sas_port, *next;
 622         struct _sas_node *sas_node;
 623         u8 found = 0;
 624         struct _sas_phy *mpt2sas_phy, *next_phy;
 625
 626         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 627         sas_node = _transport_sas_node_find_by_handle(ioc, parent_handle);
 628         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 629         if (!sas_node)
 630                 return;
 631         list_for_each_entry_safe(mpt2sas_port, next, &sas_node->sas_port_list,
 632             port_list) {
 633                 if (mpt2sas_port->remote_identify.sas_address != sas_address)
 634                         continue;
 635                 found = 1;
 636                 list_del(&mpt2sas_port->port_list);
 637                 goto out;
 638         }
 639  out:
 640         if (!found)
 641                 return;
 642
 643         for (i = 0; i < sas_node->num_phys; i++) {
 644                 if (sas_node->phy[i].remote_identify.sas_address == sas_address)
 645                         memset(&sas_node->phy[i].remote_identify, 0 ,
 646                             sizeof(struct sas_identify));
 647         }
 648
 649         list_for_each_entry_safe(mpt2sas_phy, next_phy,
 650             &mpt2sas_port->phy_list, port_siblings) {
 651                 if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 652                         dev_printk(KERN_INFO, &mpt2sas_port->port->dev,
 653                             "remove: parent_handle(0x%04x), "
 654                             "sas_addr(0x%016llx), phy(%d)\n", parent_handle,
 655                             (unsigned long long)
 656                             mpt2sas_port->remote_identify.sas_address,
 657                             mpt2sas_phy->phy_id);
 658                 sas_port_delete_phy(mpt2sas_port->port, mpt2sas_phy->phy);
 659                 list_del(&mpt2sas_phy->port_siblings);
 660         }
 661         sas_port_delete(mpt2sas_port->port);
 662         kfree(mpt2sas_port);
 663 }
 664
 665 /**
 666  * mpt2sas_transport_add_host_phy - report sas_host phy to transport
 667  * @ioc: per adapter object
 668  * @mpt2sas_phy: mpt2sas per phy object
 669  * @phy_pg0: sas phy page 0
 670  * @parent_dev: parent device class object
 671  *
 672  * Returns 0 for success, non-zero for failure.
 673  */
 674 int
 675 mpt2sas_transport_add_host_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_phy
 676     *mpt2sas_phy, Mpi2SasPhyPage0_t phy_pg0, struct device *parent_dev)
 677 {
 678         struct sas_phy *phy;
 679         int phy_index = mpt2sas_phy->phy_id;
 680
 681
 682         INIT_LIST_HEAD(&mpt2sas_phy->port_siblings);
 683         phy = sas_phy_alloc(parent_dev, phy_index);
 684         if (!phy) {
 685                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 686                     ioc->name, __FILE__, __LINE__, __func__);
 687                 return -1;
 688         }
 689         if ((_transport_set_identify(ioc, mpt2sas_phy->handle,
 690             &mpt2sas_phy->identify))) {
 691                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 692                     ioc->name, __FILE__, __LINE__, __func__);
 693                 return -1;
 694         }
 695         phy->identify = mpt2sas_phy->identify;
 696         mpt2sas_phy->attached_handle = le16_to_cpu(phy_pg0.AttachedDevHandle);
 697         if (mpt2sas_phy->attached_handle)
 698                 _transport_set_identify(ioc, mpt2sas_phy->attached_handle,
 699                     &mpt2sas_phy->remote_identify);
 700         phy->identify.phy_identifier = mpt2sas_phy->phy_id;
 701         phy->negotiated_linkrate = _transport_convert_phy_link_rate(
 702             phy_pg0.NegotiatedLinkRate & MPI2_SAS_NEG_LINK_RATE_MASK_PHYSICAL);
 703         phy->minimum_linkrate_hw = _transport_convert_phy_link_rate(
 704             phy_pg0.HwLinkRate & MPI2_SAS_HWRATE_MIN_RATE_MASK);
 705         phy->maximum_linkrate_hw = _transport_convert_phy_link_rate(
 706             phy_pg0.HwLinkRate >> 4);
 707         phy->minimum_linkrate = _transport_convert_phy_link_rate(
 708             phy_pg0.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
 709         phy->maximum_linkrate = _transport_convert_phy_link_rate(
 710             phy_pg0.ProgrammedLinkRate >> 4);
 711
 712         if ((sas_phy_add(phy))) {
 713                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 714                     ioc->name, __FILE__, __LINE__, __func__);
 715                 sas_phy_free(phy);
 716                 return -1;
 717         }
 718         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 719                 dev_printk(KERN_INFO, &phy->dev,
 720                     "add: handle(0x%04x), sas_addr(0x%016llx)\n"
 721                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
 722                     mpt2sas_phy->handle, (unsigned long long)
 723                     mpt2sas_phy->identify.sas_address,
 724                     mpt2sas_phy->attached_handle,
 725                     (unsigned long long)
 726                     mpt2sas_phy->remote_identify.sas_address);
 727         mpt2sas_phy->phy = phy;
 728         return 0;
 729 }
 730
 731
 732 /**
 733  * mpt2sas_transport_add_expander_phy - report expander phy to transport
 734  * @ioc: per adapter object
 735  * @mpt2sas_phy: mpt2sas per phy object
 736  * @expander_pg1: expander page 1
 737  * @parent_dev: parent device class object
 738  *
 739  * Returns 0 for success, non-zero for failure.
 740  */
 741 int
 742 mpt2sas_transport_add_expander_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_phy
 743     *mpt2sas_phy, Mpi2ExpanderPage1_t expander_pg1, struct device *parent_dev)
 744 {
 745         struct sas_phy *phy;
 746         int phy_index = mpt2sas_phy->phy_id;
 747
 748         INIT_LIST_HEAD(&mpt2sas_phy->port_siblings);
 749         phy = sas_phy_alloc(parent_dev, phy_index);
 750         if (!phy) {
 751                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 752                     ioc->name, __FILE__, __LINE__, __func__);
 753                 return -1;
 754         }
 755         if ((_transport_set_identify(ioc, mpt2sas_phy->handle,
 756             &mpt2sas_phy->identify))) {
 757                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 758                     ioc->name, __FILE__, __LINE__, __func__);
 759                 return -1;
 760         }
 761         phy->identify = mpt2sas_phy->identify;
 762         mpt2sas_phy->attached_handle =
 763             le16_to_cpu(expander_pg1.AttachedDevHandle);
 764         if (mpt2sas_phy->attached_handle)
 765                 _transport_set_identify(ioc, mpt2sas_phy->attached_handle,
 766                     &mpt2sas_phy->remote_identify);
 767         phy->identify.phy_identifier = mpt2sas_phy->phy_id;
 768         phy->negotiated_linkrate = _transport_convert_phy_link_rate(
 769             expander_pg1.NegotiatedLinkRate &
 770             MPI2_SAS_NEG_LINK_RATE_MASK_PHYSICAL);
 771         phy->minimum_linkrate_hw = _transport_convert_phy_link_rate(
 772             expander_pg1.HwLinkRate & MPI2_SAS_HWRATE_MIN_RATE_MASK);
 773         phy->maximum_linkrate_hw = _transport_convert_phy_link_rate(
 774             expander_pg1.HwLinkRate >> 4);
 775         phy->minimum_linkrate = _transport_convert_phy_link_rate(
 776             expander_pg1.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
 777         phy->maximum_linkrate = _transport_convert_phy_link_rate(
 778             expander_pg1.ProgrammedLinkRate >> 4);
 779
 780         if ((sas_phy_add(phy))) {
 781                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 782                     ioc->name, __FILE__, __LINE__, __func__);
 783                 sas_phy_free(phy);
 784                 return -1;
 785         }
 786         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 787                 dev_printk(KERN_INFO, &phy->dev,
 788                     "add: handle(0x%04x), sas_addr(0x%016llx)\n"
 789                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
 790                     mpt2sas_phy->handle, (unsigned long long)
 791                     mpt2sas_phy->identify.sas_address,
 792                     mpt2sas_phy->attached_handle,
 793                     (unsigned long long)
 794                     mpt2sas_phy->remote_identify.sas_address);
 795         mpt2sas_phy->phy = phy;
 796         return 0;
 797 }
 798
 799 /**
 800  * mpt2sas_transport_update_links - refreshing phy link changes
 801  * @ioc: per adapter object
 802  * @handle: handle to sas_host or expander
 803  * @attached_handle: attached device handle
 804  * @phy_numberv: phy number
 805  * @link_rate: new link rate
 806  *
 807  * Returns nothing.
 808  */
 809 void
 810 mpt2sas_transport_update_links(struct MPT2SAS_ADAPTER *ioc,
 811     u16 handle, u16 attached_handle, u8 phy_number, u8 link_rate)
 812 {
 813         unsigned long flags;
 814         struct _sas_node *sas_node;
 815         struct _sas_phy *mpt2sas_phy;
 816
 817         if (ioc->shost_recovery) {
 818                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
 819                         __func__, ioc->name);
 820                 return;
 821         }
 822
 823         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 824         sas_node = _transport_sas_node_find_by_handle(ioc, handle);
 825         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 826         if (!sas_node)
 827                 return;
 828
 829         mpt2sas_phy = &sas_node->phy[phy_number];
 830         mpt2sas_phy->attached_handle = attached_handle;
 831         if (attached_handle && (link_rate >= MPI2_SAS_NEG_LINK_RATE_1_5))
 832                 _transport_set_identify(ioc, mpt2sas_phy->attached_handle,
 833                     &mpt2sas_phy->remote_identify);
 834         else
 835                 memset(&mpt2sas_phy->remote_identify, 0 , sizeof(struct
 836                     sas_identify));
 837
 838         if (mpt2sas_phy->phy)
 839                 mpt2sas_phy->phy->negotiated_linkrate =
 840                     _transport_convert_phy_link_rate(link_rate);
 841
 842         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 843                 dev_printk(KERN_INFO, &mpt2sas_phy->phy->dev,
 844                     "refresh: handle(0x%04x), sas_addr(0x%016llx),\n"
 845                     "\tlink_rate(0x%02x), phy(%d)\n"
 846                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
 847                     handle, (unsigned long long)
 848                     mpt2sas_phy->identify.sas_address, link_rate,
 849                     phy_number, attached_handle,
 850                     (unsigned long long)
 851                     mpt2sas_phy->remote_identify.sas_address);
 852 }
 853
 854 static inline void *
 855 phy_to_ioc(struct sas_phy *phy)
 856 {
 857         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 858         return shost_priv(shost);
 859 }
 860
 861 static inline void *
 862 rphy_to_ioc(struct sas_rphy *rphy)
 863 {
 864         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
 865         return shost_priv(shost);
 866 }
 867
 868 /**
 869  * _transport_get_linkerrors -
 870  * @phy: The sas phy object
 871  *
 872  * Only support sas_host direct attached phys.
 873  * Returns 0 for success, non-zero for failure.
 874  *
 875  */
 876 static int
 877 _transport_get_linkerrors(struct sas_phy *phy)
 878 {
 879         struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
 880         struct _sas_phy *mpt2sas_phy;
 881         Mpi2ConfigReply_t mpi_reply;
 882         Mpi2SasPhyPage1_t phy_pg1;
 883         int i;
 884
 885         for (i = 0, mpt2sas_phy = NULL; i < ioc->sas_hba.num_phys &&
 886             !mpt2sas_phy; i++) {
 887                 if (ioc->sas_hba.phy[i].phy != phy)
 888                         continue;
 889                 mpt2sas_phy = &ioc->sas_hba.phy[i];
 890         }
 891
 892         if (!mpt2sas_phy) /* this phy not on sas_host */
 893                 return -EINVAL;
 894
 895         if ((mpt2sas_config_get_phy_pg1(ioc, &mpi_reply, &phy_pg1,
 896                     mpt2sas_phy->phy_id))) {
 897                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 898                     ioc->name, __FILE__, __LINE__, __func__);
 899                 return -ENXIO;
 900         }
 901
 902         if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo)
 903                 printk(MPT2SAS_INFO_FMT "phy(%d), ioc_status"
 904                     "(0x%04x), loginfo(0x%08x)\n", ioc->name,
 905                     mpt2sas_phy->phy_id,
 906                     le16_to_cpu(mpi_reply.IOCStatus),
 907                     le32_to_cpu(mpi_reply.IOCLogInfo));
 908
 909         phy->invalid_dword_count = le32_to_cpu(phy_pg1.InvalidDwordCount);
 910         phy->running_disparity_error_count =
 911             le32_to_cpu(phy_pg1.RunningDisparityErrorCount);
 912         phy->loss_of_dword_sync_count =
 913             le32_to_cpu(phy_pg1.LossDwordSynchCount);
 914         phy->phy_reset_problem_count =
 915             le32_to_cpu(phy_pg1.PhyResetProblemCount);
 916         return 0;
 917 }
 918
 919 /**
 920  * _transport_get_enclosure_identifier -
 921  * @phy: The sas phy object
 922  *
 923  * Obtain the enclosure logical id for an expander.
 924  * Returns 0 for success, non-zero for failure.
 925  */
 926 static int
 927 _transport_get_enclosure_identifier(struct sas_rphy *rphy, u64 *identifier)
 928 {
 929         struct MPT2SAS_ADAPTER *ioc = rphy_to_ioc(rphy);
 930         struct _sas_node *sas_expander;
 931         unsigned long flags;
 932
 933         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 934         sas_expander = mpt2sas_scsih_expander_find_by_sas_address(ioc,
 935             rphy->identify.sas_address);
 936         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 937
 938         if (!sas_expander)
 939                 return -ENXIO;
 940
 941         *identifier = sas_expander->enclosure_logical_id;
 942         return 0;
 943 }
 944
 945 /**
 946  * _transport_get_bay_identifier -
 947  * @phy: The sas phy object
 948  *
 949  * Returns the slot id for a device that resides inside an enclosure.
 950  */
 951 static int
 952 _transport_get_bay_identifier(struct sas_rphy *rphy)
 953 {
 954         struct MPT2SAS_ADAPTER *ioc = rphy_to_ioc(rphy);
 955         struct _sas_device *sas_device;
 956         unsigned long flags;
 957
 958         spin_lock_irqsave(&ioc->sas_device_lock, flags);
 959         sas_device = mpt2sas_scsih_sas_device_find_by_sas_address(ioc,
 960             rphy->identify.sas_address);
 961         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
 962
 963         if (!sas_device)
 964                 return -ENXIO;
 965
 966         return sas_device->slot;
 967 }
 968
 969 /**
 970  * _transport_phy_reset -
 971  * @phy: The sas phy object
 972  * @hard_reset:
 973  *
 974  * Only support sas_host direct attached phys.
 975  * Returns 0 for success, non-zero for failure.
 976  */
 977 static int
 978 _transport_phy_reset(struct sas_phy *phy, int hard_reset)
 979 {
 980         struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
 981         struct _sas_phy *mpt2sas_phy;
 982         Mpi2SasIoUnitControlReply_t mpi_reply;
 983         Mpi2SasIoUnitControlRequest_t mpi_request;
 984         int i;
 985
 986         for (i = 0, mpt2sas_phy = NULL; i < ioc->sas_hba.num_phys &&
 987             !mpt2sas_phy; i++) {
 988                 if (ioc->sas_hba.phy[i].phy != phy)
 989                         continue;
 990                 mpt2sas_phy = &ioc->sas_hba.phy[i];
 991         }
 992
 993         if (!mpt2sas_phy) /* this phy not on sas_host */
 994                 return -EINVAL;
 995
 996         memset(&mpi_request, 0, sizeof(Mpi2SasIoUnitControlReply_t));
 997         mpi_request.Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
 998         mpi_request.Operation = hard_reset ?
 999             MPI2_SAS_OP_PHY_HARD_RESET : MPI2_SAS_OP_PHY_LINK_RESET;
1000         mpi_request.PhyNum = mpt2sas_phy->phy_id;
1001
1002         if ((mpt2sas_base_sas_iounit_control(ioc, &mpi_reply, &mpi_request))) {
1003                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1004                     ioc->name, __FILE__, __LINE__, __func__);
1005                 return -ENXIO;
1006         }
1007
1008         if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo)
1009                 printk(MPT2SAS_INFO_FMT "phy(%d), ioc_status"
1010                     "(0x%04x), loginfo(0x%08x)\n", ioc->name,
1011                     mpt2sas_phy->phy_id,
1012                     le16_to_cpu(mpi_reply.IOCStatus),
1013                     le32_to_cpu(mpi_reply.IOCLogInfo));
1014
1015         return 0;
1016 }
1017
1018 /**
1019  * _transport_smp_handler - transport portal for smp passthru
1020  * @shost: shost object
1021  * @rphy: sas transport rphy object
1022  * @req:
1023  *
1024  * This used primarily for smp_utils.
1025  * Example:
1026  *           smp_rep_general /sys/class/bsg/expander-5:0
1027  */
1028 static int
1029 _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
1030     struct request *req)
1031 {
1032         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
1033         Mpi2SmpPassthroughRequest_t *mpi_request;
1034         Mpi2SmpPassthroughReply_t *mpi_reply;
1035         int rc;
1036         u16 smid;
1037         u32 ioc_state;
1038         unsigned long timeleft;
1039         void *psge;
1040         u32 sgl_flags;
1041         u8 issue_reset = 0;
1042         dma_addr_t dma_addr_in = 0;
1043         dma_addr_t dma_addr_out = 0;
1044         u16 wait_state_count;
1045         struct request *rsp = req->next_rq;
1046
1047         if (!rsp) {
1048                 printk(MPT2SAS_ERR_FMT "%s: the smp response space is "
1049                     "missing\n", ioc->name, __func__);
1050                 return -EINVAL;
1051         }
1052
1053         /* do we need to support multiple segments? */
1054         if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
1055                 printk(MPT2SAS_ERR_FMT "%s: multiple segments req %u %u, "
1056                     "rsp %u %u\n", ioc->name, __func__, req->bio->bi_vcnt,
1057                     blk_rq_bytes(req), rsp->bio->bi_vcnt, blk_rq_bytes(rsp));
1058                 return -EINVAL;
1059         }
1060
1061         if (ioc->shost_recovery) {
1062                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
1063                     __func__, ioc->name);
1064                 return -EFAULT;
1065         }
1066
1067         rc = mutex_lock_interruptible(&ioc->transport_cmds.mutex);
1068         if (rc)
1069                 return rc;
1070
1071         if (ioc->transport_cmds.status != MPT2_CMD_NOT_USED) {
1072                 printk(MPT2SAS_ERR_FMT "%s: transport_cmds in use\n", ioc->name,
1073                     __func__);
1074                 rc = -EAGAIN;
1075                 goto out;
1076         }
1077         ioc->transport_cmds.status = MPT2_CMD_PENDING;
1078
1079         wait_state_count = 0;
1080         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1081         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1082                 if (wait_state_count++ == 10) {
1083                         printk(MPT2SAS_ERR_FMT
1084                             "%s: failed due to ioc not operational\n",
1085                             ioc->name, __func__);
1086                         rc = -EFAULT;
1087                         goto out;
1088                 }
1089                 ssleep(1);
1090                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1091                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
1092                     "operational state(count=%d)\n", ioc->name,
1093                     __func__, wait_state_count);
1094         }
1095         if (wait_state_count)
1096                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
1097                     ioc->name, __func__);
1098
1099         smid = mpt2sas_base_get_smid(ioc, ioc->transport_cb_idx);
1100         if (!smid) {
1101                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
1102                     ioc->name, __func__);
1103                 rc = -EAGAIN;
1104                 goto out;
1105         }
1106
1107         rc = 0;
1108         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
1109         ioc->transport_cmds.smid = smid;
1110
1111         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
1112         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
1113         mpi_request->PhysicalPort = 0xFF;
1114         mpi_request->VF_ID = 0; /* TODO */
1115         mpi_request->VP_ID = 0;
1116         *((u64 *)&mpi_request->SASAddress) = (rphy) ?
1117             cpu_to_le64(rphy->identify.sas_address) :
1118             cpu_to_le64(ioc->sas_hba.sas_address);
1119         mpi_request->RequestDataLength = cpu_to_le16(blk_rq_bytes(req) - 4);
1120         psge = &mpi_request->SGL;
1121
1122         /* WRITE sgel first */
1123         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
1124             MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
1125         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
1126         dma_addr_out = pci_map_single(ioc->pdev, bio_data(req->bio),
1127                 blk_rq_bytes(req), PCI_DMA_BIDIRECTIONAL);
1128         if (!dma_addr_out) {
1129                 mpt2sas_base_free_smid(ioc, le16_to_cpu(smid));
1130                 goto unmap;
1131         }
1132
1133         ioc->base_add_sg_single(psge, sgl_flags | (blk_rq_bytes(req) - 4),
1134             dma_addr_out);
1135
1136         /* incr sgel */
1137         psge += ioc->sge_size;
1138
1139         /* READ sgel last */
1140         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
1141             MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
1142             MPI2_SGE_FLAGS_END_OF_LIST);
1143         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
1144         dma_addr_in = pci_map_single(ioc->pdev, bio_data(rsp->bio),
1145                                      blk_rq_bytes(rsp), PCI_DMA_BIDIRECTIONAL);
1146         if (!dma_addr_in) {
1147                 mpt2sas_base_free_smid(ioc, le16_to_cpu(smid));
1148                 goto unmap;
1149         }
1150
1151         ioc->base_add_sg_single(psge, sgl_flags | (blk_rq_bytes(rsp) + 4),
1152             dma_addr_in);
1153
1154         dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s - "
1155             "sending smp request\n", ioc->name, __func__));
1156
1157         mpt2sas_base_put_smid_default(ioc, smid);
1158         init_completion(&ioc->transport_cmds.done);
1159         timeleft = wait_for_completion_timeout(&ioc->transport_cmds.done,
1160             10*HZ);
1161
1162         if (!(ioc->transport_cmds.status & MPT2_CMD_COMPLETE)) {
1163                 printk(MPT2SAS_ERR_FMT "%s : timeout\n",
1164                     __func__, ioc->name);
1165                 _debug_dump_mf(mpi_request,
1166                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
1167                 if (!(ioc->transport_cmds.status & MPT2_CMD_RESET))
1168                         issue_reset = 1;
1169                 goto issue_host_reset;
1170         }
1171
1172         dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s - "
1173             "complete\n", ioc->name, __func__));
1174
1175         if (ioc->transport_cmds.status & MPT2_CMD_REPLY_VALID) {
1176
1177                 mpi_reply = ioc->transport_cmds.reply;
1178
1179                 dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT
1180                     "%s - reply data transfer size(%d)\n",
1181                     ioc->name, __func__,
1182                     le16_to_cpu(mpi_reply->ResponseDataLength)));
1183
1184                 memcpy(req->sense, mpi_reply, sizeof(*mpi_reply));
1185                 req->sense_len = sizeof(*mpi_reply);
1186                 req->resid_len = 0;
1187                 rsp->resid_len -= mpi_reply->ResponseDataLength;
1188         } else {
1189                 dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT
1190                     "%s - no reply\n", ioc->name, __func__));
1191                 rc = -ENXIO;
1192         }
1193
1194  issue_host_reset:
1195         if (issue_reset) {
1196                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1197                     FORCE_BIG_HAMMER);
1198                 rc = -ETIMEDOUT;
1199         }
1200
1201  unmap:
1202         if (dma_addr_out)
1203                 pci_unmap_single(ioc->pdev, dma_addr_out, blk_rq_bytes(req),
1204                     PCI_DMA_BIDIRECTIONAL);
1205         if (dma_addr_in)
1206                 pci_unmap_single(ioc->pdev, dma_addr_in, blk_rq_bytes(rsp),
1207                     PCI_DMA_BIDIRECTIONAL);
1208
1209  out:
1210         ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
1211         mutex_unlock(&ioc->transport_cmds.mutex);
1212         return rc;
1213 }
1214
1215 struct sas_function_template mpt2sas_transport_functions = {
1216         .get_linkerrors         = _transport_get_linkerrors,
1217         .get_enclosure_identifier = _transport_get_enclosure_identifier,
1218         .get_bay_identifier     = _transport_get_bay_identifier,
1219         .phy_reset              = _transport_phy_reset,
1220         .smp_handler            = _transport_smp_handler,
1221 };
1222
1223 struct scsi_transport_template *mpt2sas_transport_template;