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   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) 2007-2008  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 ((mpt2sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
 144             MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, handle))) {
 145                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 146                     ioc->name, __FILE__, __LINE__, __func__);
 147                 return -1;
 148         }
 149
 150         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
 151             MPI2_IOCSTATUS_MASK;
 152         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
 153                 printk(MPT2SAS_ERR_FMT "handle(0x%04x), ioc_status(0x%04x)"
 154                     "\nfailure at %s:%d/%s()!\n", ioc->name, handle, ioc_status,
 155                      __FILE__, __LINE__, __func__);
 156                 return -1;
 157         }
 158
 159         memset(identify, 0, sizeof(identify));
 160         device_info = le32_to_cpu(sas_device_pg0.DeviceInfo);
 161
 162         /* sas_address */
 163         identify->sas_address = le64_to_cpu(sas_device_pg0.SASAddress);
 164
 165         /* device_type */
 166         switch (device_info & MPI2_SAS_DEVICE_INFO_MASK_DEVICE_TYPE) {
 167         case MPI2_SAS_DEVICE_INFO_NO_DEVICE:
 168                 identify->device_type = SAS_PHY_UNUSED;
 169                 break;
 170         case MPI2_SAS_DEVICE_INFO_END_DEVICE:
 171                 identify->device_type = SAS_END_DEVICE;
 172                 break;
 173         case MPI2_SAS_DEVICE_INFO_EDGE_EXPANDER:
 174                 identify->device_type = SAS_EDGE_EXPANDER_DEVICE;
 175                 break;
 176         case MPI2_SAS_DEVICE_INFO_FANOUT_EXPANDER:
 177                 identify->device_type = SAS_FANOUT_EXPANDER_DEVICE;
 178                 break;
 179         }
 180
 181         /* initiator_port_protocols */
 182         if (device_info & MPI2_SAS_DEVICE_INFO_SSP_INITIATOR)
 183                 identify->initiator_port_protocols |= SAS_PROTOCOL_SSP;
 184         if (device_info & MPI2_SAS_DEVICE_INFO_STP_INITIATOR)
 185                 identify->initiator_port_protocols |= SAS_PROTOCOL_STP;
 186         if (device_info & MPI2_SAS_DEVICE_INFO_SMP_INITIATOR)
 187                 identify->initiator_port_protocols |= SAS_PROTOCOL_SMP;
 188         if (device_info & MPI2_SAS_DEVICE_INFO_SATA_HOST)
 189                 identify->initiator_port_protocols |= SAS_PROTOCOL_SATA;
 190
 191         /* target_port_protocols */
 192         if (device_info & MPI2_SAS_DEVICE_INFO_SSP_TARGET)
 193                 identify->target_port_protocols |= SAS_PROTOCOL_SSP;
 194         if (device_info & MPI2_SAS_DEVICE_INFO_STP_TARGET)
 195                 identify->target_port_protocols |= SAS_PROTOCOL_STP;
 196         if (device_info & MPI2_SAS_DEVICE_INFO_SMP_TARGET)
 197                 identify->target_port_protocols |= SAS_PROTOCOL_SMP;
 198         if (device_info & MPI2_SAS_DEVICE_INFO_SATA_DEVICE)
 199                 identify->target_port_protocols |= SAS_PROTOCOL_SATA;
 200
 201         return 0;
 202 }
 203
 204 /**
 205  * mpt2sas_transport_done -  internal transport layer callback handler.
 206  * @ioc: per adapter object
 207  * @smid: system request message index
 208  * @VF_ID: virtual function id
 209  * @reply: reply message frame(lower 32bit addr)
 210  *
 211  * Callback handler when sending internal generated transport cmds.
 212  * The callback index passed is `ioc->transport_cb_idx`
 213  *
 214  * Return nothing.
 215  */
 216 void
 217 mpt2sas_transport_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID,
 218     u32 reply)
 219 {
 220         MPI2DefaultReply_t *mpi_reply;
 221
 222         mpi_reply =  mpt2sas_base_get_reply_virt_addr(ioc, reply);
 223         if (ioc->transport_cmds.status == MPT2_CMD_NOT_USED)
 224                 return;
 225         if (ioc->transport_cmds.smid != smid)
 226                 return;
 227         ioc->transport_cmds.status |= MPT2_CMD_COMPLETE;
 228         if (mpi_reply) {
 229                 memcpy(ioc->transport_cmds.reply, mpi_reply,
 230                     mpi_reply->MsgLength*4);
 231                 ioc->transport_cmds.status |= MPT2_CMD_REPLY_VALID;
 232         }
 233         ioc->transport_cmds.status &= ~MPT2_CMD_PENDING;
 234         complete(&ioc->transport_cmds.done);
 235 }
 236
 237 /* report manufacture request structure */
 238 struct rep_manu_request{
 239         u8 smp_frame_type;
 240         u8 function;
 241         u8 reserved;
 242         u8 request_length;
 243 };
 244
 245 /* report manufacture reply structure */
 246 struct rep_manu_reply{
 247         u8 smp_frame_type; /* 0x41 */
 248         u8 function; /* 0x01 */
 249         u8 function_result;
 250         u8 response_length;
 251         u16 expander_change_count;
 252         u8 reserved0[2];
 253         u8 sas_format:1;
 254         u8 reserved1:7;
 255         u8 reserved2[3];
 256         u8 vendor_id[SAS_EXPANDER_VENDOR_ID_LEN];
 257         u8 product_id[SAS_EXPANDER_PRODUCT_ID_LEN];
 258         u8 product_rev[SAS_EXPANDER_PRODUCT_REV_LEN];
 259         u8 component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN];
 260         u16 component_id;
 261         u8 component_revision_id;
 262         u8 reserved3;
 263         u8 vendor_specific[8];
 264 };
 265
 266 /**
 267  * transport_expander_report_manufacture - obtain SMP report_manufacture
 268  * @ioc: per adapter object
 269  * @sas_address: expander sas address
 270  * @edev: the sas_expander_device object
 271  *
 272  * Fills in the sas_expander_device object when SMP port is created.
 273  *
 274  * Returns 0 for success, non-zero for failure.
 275  */
 276 static int
 277 transport_expander_report_manufacture(struct MPT2SAS_ADAPTER *ioc,
 278     u64 sas_address, struct sas_expander_device *edev)
 279 {
 280         Mpi2SmpPassthroughRequest_t *mpi_request;
 281         Mpi2SmpPassthroughReply_t *mpi_reply;
 282         struct rep_manu_reply *manufacture_reply;
 283         struct rep_manu_request *manufacture_request;
 284         int rc;
 285         u16 smid;
 286         u32 ioc_state;
 287         unsigned long timeleft;
 288         void *psge;
 289         u32 sgl_flags;
 290         u8 issue_reset = 0;
 291         unsigned long flags;
 292         void *data_out = NULL;
 293         dma_addr_t data_out_dma;
 294         u32 sz;
 295         u64 *sas_address_le;
 296         u16 wait_state_count;
 297
 298         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
 299         if (ioc->ioc_reset_in_progress) {
 300                 spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 301                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
 302                     __func__, ioc->name);
 303                 return -EFAULT;
 304         }
 305         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 306
 307         mutex_lock(&ioc->transport_cmds.mutex);
 308
 309         if (ioc->transport_cmds.status != MPT2_CMD_NOT_USED) {
 310                 printk(MPT2SAS_ERR_FMT "%s: transport_cmds in use\n",
 311                     ioc->name, __func__);
 312                 rc = -EAGAIN;
 313                 goto out;
 314         }
 315         ioc->transport_cmds.status = MPT2_CMD_PENDING;
 316
 317         wait_state_count = 0;
 318         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 319         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
 320                 if (wait_state_count++ == 10) {
 321                         printk(MPT2SAS_ERR_FMT
 322                             "%s: failed due to ioc not operational\n",
 323                             ioc->name, __func__);
 324                         rc = -EFAULT;
 325                         goto out;
 326                 }
 327                 ssleep(1);
 328                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 329                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
 330                     "operational state(count=%d)\n", ioc->name,
 331                     __func__, wait_state_count);
 332         }
 333         if (wait_state_count)
 334                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
 335                     ioc->name, __func__);
 336
 337         smid = mpt2sas_base_get_smid(ioc, ioc->transport_cb_idx);
 338         if (!smid) {
 339                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 340                     ioc->name, __func__);
 341                 rc = -EAGAIN;
 342                 goto out;
 343         }
 344
 345         rc = 0;
 346         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
 347         ioc->transport_cmds.smid = smid;
 348
 349         sz = sizeof(struct rep_manu_request) + sizeof(struct rep_manu_reply);
 350         data_out = pci_alloc_consistent(ioc->pdev, sz, &data_out_dma);
 351
 352         if (!data_out) {
 353                 printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 354                     __LINE__, __func__);
 355                 rc = -ENOMEM;
 356                 mpt2sas_base_free_smid(ioc, smid);
 357                 goto out;
 358         }
 359
 360         manufacture_request = data_out;
 361         manufacture_request->smp_frame_type = 0x40;
 362         manufacture_request->function = 1;
 363         manufacture_request->reserved = 0;
 364         manufacture_request->request_length = 0;
 365
 366         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
 367         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
 368         mpi_request->PhysicalPort = 0xFF;
 369         sas_address_le = (u64 *)&mpi_request->SASAddress;
 370         *sas_address_le = cpu_to_le64(sas_address);
 371         mpi_request->RequestDataLength = sizeof(struct rep_manu_request);
 372         psge = &mpi_request->SGL;
 373
 374         /* WRITE sgel first */
 375         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 376             MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
 377         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 378         ioc->base_add_sg_single(psge, sgl_flags |
 379             sizeof(struct rep_manu_request), data_out_dma);
 380
 381         /* incr sgel */
 382         psge += ioc->sge_size;
 383
 384         /* READ sgel last */
 385         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 386             MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 387             MPI2_SGE_FLAGS_END_OF_LIST);
 388         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 389         ioc->base_add_sg_single(psge, sgl_flags |
 390             sizeof(struct rep_manu_reply), data_out_dma +
 391             sizeof(struct rep_manu_request));
 392
 393         dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT "report_manufacture - "
 394             "send to sas_addr(0x%016llx)\n", ioc->name,
 395             (unsigned long long)sas_address));
 396         mpt2sas_base_put_smid_default(ioc, smid, 0 /* VF_ID */);
 397         timeleft = wait_for_completion_timeout(&ioc->transport_cmds.done,
 398             10*HZ);
 399
 400         if (!(ioc->transport_cmds.status & MPT2_CMD_COMPLETE)) {
 401                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
 402                     ioc->name, __func__);
 403                 _debug_dump_mf(mpi_request,
 404                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
 405                 if (!(ioc->transport_cmds.status & MPT2_CMD_RESET))
 406                         issue_reset = 1;
 407                 goto issue_host_reset;
 408         }
 409
 410         dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT "report_manufacture - "
 411             "complete\n", ioc->name));
 412
 413         if (ioc->transport_cmds.status & MPT2_CMD_REPLY_VALID) {
 414                 u8 *tmp;
 415
 416                 mpi_reply = ioc->transport_cmds.reply;
 417
 418                 dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT
 419                     "report_manufacture - reply data transfer size(%d)\n",
 420                     ioc->name, le16_to_cpu(mpi_reply->ResponseDataLength)));
 421
 422                 if (le16_to_cpu(mpi_reply->ResponseDataLength) !=
 423                     sizeof(struct rep_manu_reply))
 424                         goto out;
 425
 426                 manufacture_reply = data_out + sizeof(struct rep_manu_request);
 427                 strncpy(edev->vendor_id, manufacture_reply->vendor_id,
 428                      SAS_EXPANDER_VENDOR_ID_LEN);
 429                 strncpy(edev->product_id, manufacture_reply->product_id,
 430                      SAS_EXPANDER_PRODUCT_ID_LEN);
 431                 strncpy(edev->product_rev, manufacture_reply->product_rev,
 432                      SAS_EXPANDER_PRODUCT_REV_LEN);
 433                 edev->level = manufacture_reply->sas_format;
 434                 if (manufacture_reply->sas_format) {
 435                         strncpy(edev->component_vendor_id,
 436                             manufacture_reply->component_vendor_id,
 437                              SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
 438                         tmp = (u8 *)&manufacture_reply->component_id;
 439                         edev->component_id = tmp[0] << 8 | tmp[1];
 440                         edev->component_revision_id =
 441                             manufacture_reply->component_revision_id;
 442                 }
 443         } else
 444                 dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT
 445                     "report_manufacture - no reply\n", ioc->name));
 446
 447  issue_host_reset:
 448         if (issue_reset)
 449                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 450                     FORCE_BIG_HAMMER);
 451  out:
 452         ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
 453         if (data_out)
 454                 pci_free_consistent(ioc->pdev, sz, data_out, data_out_dma);
 455
 456         mutex_unlock(&ioc->transport_cmds.mutex);
 457         return rc;
 458 }
 459
 460 /**
 461  * mpt2sas_transport_port_add - insert port to the list
 462  * @ioc: per adapter object
 463  * @handle: handle of attached device
 464  * @parent_handle: parent handle(either hba or expander)
 465  * Context: This function will acquire ioc->sas_node_lock.
 466  *
 467  * Adding new port object to the sas_node->sas_port_list.
 468  *
 469  * Returns mpt2sas_port.
 470  */
 471 struct _sas_port *
 472 mpt2sas_transport_port_add(struct MPT2SAS_ADAPTER *ioc, u16 handle,
 473     u16 parent_handle)
 474 {
 475         struct _sas_phy *mpt2sas_phy, *next;
 476         struct _sas_port *mpt2sas_port;
 477         unsigned long flags;
 478         struct _sas_node *sas_node;
 479         struct sas_rphy *rphy;
 480         int i;
 481         struct sas_port *port;
 482
 483         if (!parent_handle)
 484                 return NULL;
 485
 486         mpt2sas_port = kzalloc(sizeof(struct _sas_port),
 487             GFP_KERNEL);
 488         if (!mpt2sas_port) {
 489                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 490                     ioc->name, __FILE__, __LINE__, __func__);
 491                 return NULL;
 492         }
 493
 494         INIT_LIST_HEAD(&mpt2sas_port->port_list);
 495         INIT_LIST_HEAD(&mpt2sas_port->phy_list);
 496         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 497         sas_node = _transport_sas_node_find_by_handle(ioc, parent_handle);
 498         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 499
 500         if (!sas_node) {
 501                 printk(MPT2SAS_ERR_FMT "%s: Could not find parent(0x%04x)!\n",
 502                     ioc->name, __func__, parent_handle);
 503                 goto out_fail;
 504         }
 505
 506         mpt2sas_port->handle = parent_handle;
 507         mpt2sas_port->sas_address = sas_node->sas_address;
 508         if ((_transport_set_identify(ioc, handle,
 509             &mpt2sas_port->remote_identify))) {
 510                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 511                     ioc->name, __FILE__, __LINE__, __func__);
 512                 goto out_fail;
 513         }
 514
 515         if (mpt2sas_port->remote_identify.device_type == SAS_PHY_UNUSED) {
 516                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 517                     ioc->name, __FILE__, __LINE__, __func__);
 518                 goto out_fail;
 519         }
 520
 521         for (i = 0; i < sas_node->num_phys; i++) {
 522                 if (sas_node->phy[i].remote_identify.sas_address !=
 523                     mpt2sas_port->remote_identify.sas_address)
 524                         continue;
 525                 list_add_tail(&sas_node->phy[i].port_siblings,
 526                     &mpt2sas_port->phy_list);
 527                 mpt2sas_port->num_phys++;
 528         }
 529
 530         if (!mpt2sas_port->num_phys) {
 531                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 532                     ioc->name, __FILE__, __LINE__, __func__);
 533                 goto out_fail;
 534         }
 535
 536         port = sas_port_alloc_num(sas_node->parent_dev);
 537         if ((sas_port_add(port))) {
 538                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 539                     ioc->name, __FILE__, __LINE__, __func__);
 540                 goto out_fail;
 541         }
 542
 543         list_for_each_entry(mpt2sas_phy, &mpt2sas_port->phy_list,
 544             port_siblings) {
 545                 if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 546                         dev_printk(KERN_INFO, &port->dev, "add: handle(0x%04x)"
 547                             ", sas_addr(0x%016llx), phy(%d)\n", handle,
 548                             (unsigned long long)
 549                             mpt2sas_port->remote_identify.sas_address,
 550                             mpt2sas_phy->phy_id);
 551                 sas_port_add_phy(port, mpt2sas_phy->phy);
 552         }
 553
 554         mpt2sas_port->port = port;
 555         if (mpt2sas_port->remote_identify.device_type == SAS_END_DEVICE)
 556                 rphy = sas_end_device_alloc(port);
 557         else
 558                 rphy = sas_expander_alloc(port,
 559                     mpt2sas_port->remote_identify.device_type);
 560
 561         rphy->identify = mpt2sas_port->remote_identify;
 562         if ((sas_rphy_add(rphy))) {
 563                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 564                     ioc->name, __FILE__, __LINE__, __func__);
 565         }
 566         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 567                 dev_printk(KERN_INFO, &rphy->dev, "add: handle(0x%04x), "
 568                     "sas_addr(0x%016llx)\n", handle,
 569                     (unsigned long long)
 570                     mpt2sas_port->remote_identify.sas_address);
 571         mpt2sas_port->rphy = rphy;
 572         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 573         list_add_tail(&mpt2sas_port->port_list, &sas_node->sas_port_list);
 574         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 575
 576         /* fill in report manufacture */
 577         if (mpt2sas_port->remote_identify.device_type ==
 578             MPI2_SAS_DEVICE_INFO_EDGE_EXPANDER ||
 579             mpt2sas_port->remote_identify.device_type ==
 580             MPI2_SAS_DEVICE_INFO_FANOUT_EXPANDER)
 581                 transport_expander_report_manufacture(ioc,
 582                     mpt2sas_port->remote_identify.sas_address,
 583                     rphy_to_expander_device(rphy));
 584
 585         return mpt2sas_port;
 586
 587  out_fail:
 588         list_for_each_entry_safe(mpt2sas_phy, next, &mpt2sas_port->phy_list,
 589             port_siblings)
 590                 list_del(&mpt2sas_phy->port_siblings);
 591         kfree(mpt2sas_port);
 592         return NULL;
 593 }
 594
 595 /**
 596  * mpt2sas_transport_port_remove - remove port from the list
 597  * @ioc: per adapter object
 598  * @sas_address: sas address of attached device
 599  * @parent_handle: handle to the upstream parent(either hba or expander)
 600  * Context: This function will acquire ioc->sas_node_lock.
 601  *
 602  * Removing object and freeing associated memory from the
 603  * ioc->sas_port_list.
 604  *
 605  * Return nothing.
 606  */
 607 void
 608 mpt2sas_transport_port_remove(struct MPT2SAS_ADAPTER *ioc, u64 sas_address,
 609     u16 parent_handle)
 610 {
 611         int i;
 612         unsigned long flags;
 613         struct _sas_port *mpt2sas_port, *next;
 614         struct _sas_node *sas_node;
 615         u8 found = 0;
 616         struct _sas_phy *mpt2sas_phy, *next_phy;
 617
 618         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 619         sas_node = _transport_sas_node_find_by_handle(ioc, parent_handle);
 620         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 621         if (!sas_node)
 622                 return;
 623         list_for_each_entry_safe(mpt2sas_port, next, &sas_node->sas_port_list,
 624             port_list) {
 625                 if (mpt2sas_port->remote_identify.sas_address != sas_address)
 626                         continue;
 627                 found = 1;
 628                 list_del(&mpt2sas_port->port_list);
 629                 goto out;
 630         }
 631  out:
 632         if (!found)
 633                 return;
 634
 635         for (i = 0; i < sas_node->num_phys; i++) {
 636                 if (sas_node->phy[i].remote_identify.sas_address == sas_address)
 637                         memset(&sas_node->phy[i].remote_identify, 0 ,
 638                             sizeof(struct sas_identify));
 639         }
 640
 641         list_for_each_entry_safe(mpt2sas_phy, next_phy,
 642             &mpt2sas_port->phy_list, port_siblings) {
 643                 if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 644                         dev_printk(KERN_INFO, &mpt2sas_port->port->dev,
 645                             "remove: parent_handle(0x%04x), "
 646                             "sas_addr(0x%016llx), phy(%d)\n", parent_handle,
 647                             (unsigned long long)
 648                             mpt2sas_port->remote_identify.sas_address,
 649                             mpt2sas_phy->phy_id);
 650                 sas_port_delete_phy(mpt2sas_port->port, mpt2sas_phy->phy);
 651                 list_del(&mpt2sas_phy->port_siblings);
 652         }
 653         sas_port_delete(mpt2sas_port->port);
 654         kfree(mpt2sas_port);
 655 }
 656
 657 /**
 658  * mpt2sas_transport_add_host_phy - report sas_host phy to transport
 659  * @ioc: per adapter object
 660  * @mpt2sas_phy: mpt2sas per phy object
 661  * @phy_pg0: sas phy page 0
 662  * @parent_dev: parent device class object
 663  *
 664  * Returns 0 for success, non-zero for failure.
 665  */
 666 int
 667 mpt2sas_transport_add_host_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_phy
 668     *mpt2sas_phy, Mpi2SasPhyPage0_t phy_pg0, struct device *parent_dev)
 669 {
 670         struct sas_phy *phy;
 671         int phy_index = mpt2sas_phy->phy_id;
 672
 673
 674         INIT_LIST_HEAD(&mpt2sas_phy->port_siblings);
 675         phy = sas_phy_alloc(parent_dev, phy_index);
 676         if (!phy) {
 677                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 678                     ioc->name, __FILE__, __LINE__, __func__);
 679                 return -1;
 680         }
 681         if ((_transport_set_identify(ioc, mpt2sas_phy->handle,
 682             &mpt2sas_phy->identify))) {
 683                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 684                     ioc->name, __FILE__, __LINE__, __func__);
 685                 return -1;
 686         }
 687         phy->identify = mpt2sas_phy->identify;
 688         mpt2sas_phy->attached_handle = le16_to_cpu(phy_pg0.AttachedDevHandle);
 689         if (mpt2sas_phy->attached_handle)
 690                 _transport_set_identify(ioc, mpt2sas_phy->attached_handle,
 691                     &mpt2sas_phy->remote_identify);
 692         phy->identify.phy_identifier = mpt2sas_phy->phy_id;
 693         phy->negotiated_linkrate = _transport_convert_phy_link_rate(
 694             phy_pg0.NegotiatedLinkRate & MPI2_SAS_NEG_LINK_RATE_MASK_PHYSICAL);
 695         phy->minimum_linkrate_hw = _transport_convert_phy_link_rate(
 696             phy_pg0.HwLinkRate & MPI2_SAS_HWRATE_MIN_RATE_MASK);
 697         phy->maximum_linkrate_hw = _transport_convert_phy_link_rate(
 698             phy_pg0.HwLinkRate >> 4);
 699         phy->minimum_linkrate = _transport_convert_phy_link_rate(
 700             phy_pg0.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
 701         phy->maximum_linkrate = _transport_convert_phy_link_rate(
 702             phy_pg0.ProgrammedLinkRate >> 4);
 703
 704         if ((sas_phy_add(phy))) {
 705                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 706                     ioc->name, __FILE__, __LINE__, __func__);
 707                 sas_phy_free(phy);
 708                 return -1;
 709         }
 710         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 711                 dev_printk(KERN_INFO, &phy->dev,
 712                     "add: handle(0x%04x), sas_addr(0x%016llx)\n"
 713                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
 714                     mpt2sas_phy->handle, (unsigned long long)
 715                     mpt2sas_phy->identify.sas_address,
 716                     mpt2sas_phy->attached_handle,
 717                     (unsigned long long)
 718                     mpt2sas_phy->remote_identify.sas_address);
 719         mpt2sas_phy->phy = phy;
 720         return 0;
 721 }
 722
 723
 724 /**
 725  * mpt2sas_transport_add_expander_phy - report expander phy to transport
 726  * @ioc: per adapter object
 727  * @mpt2sas_phy: mpt2sas per phy object
 728  * @expander_pg1: expander page 1
 729  * @parent_dev: parent device class object
 730  *
 731  * Returns 0 for success, non-zero for failure.
 732  */
 733 int
 734 mpt2sas_transport_add_expander_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_phy
 735     *mpt2sas_phy, Mpi2ExpanderPage1_t expander_pg1, struct device *parent_dev)
 736 {
 737         struct sas_phy *phy;
 738         int phy_index = mpt2sas_phy->phy_id;
 739
 740         INIT_LIST_HEAD(&mpt2sas_phy->port_siblings);
 741         phy = sas_phy_alloc(parent_dev, phy_index);
 742         if (!phy) {
 743                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 744                     ioc->name, __FILE__, __LINE__, __func__);
 745                 return -1;
 746         }
 747         if ((_transport_set_identify(ioc, mpt2sas_phy->handle,
 748             &mpt2sas_phy->identify))) {
 749                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 750                     ioc->name, __FILE__, __LINE__, __func__);
 751                 return -1;
 752         }
 753         phy->identify = mpt2sas_phy->identify;
 754         mpt2sas_phy->attached_handle =
 755             le16_to_cpu(expander_pg1.AttachedDevHandle);
 756         if (mpt2sas_phy->attached_handle)
 757                 _transport_set_identify(ioc, mpt2sas_phy->attached_handle,
 758                     &mpt2sas_phy->remote_identify);
 759         phy->identify.phy_identifier = mpt2sas_phy->phy_id;
 760         phy->negotiated_linkrate = _transport_convert_phy_link_rate(
 761             expander_pg1.NegotiatedLinkRate &
 762             MPI2_SAS_NEG_LINK_RATE_MASK_PHYSICAL);
 763         phy->minimum_linkrate_hw = _transport_convert_phy_link_rate(
 764             expander_pg1.HwLinkRate & MPI2_SAS_HWRATE_MIN_RATE_MASK);
 765         phy->maximum_linkrate_hw = _transport_convert_phy_link_rate(
 766             expander_pg1.HwLinkRate >> 4);
 767         phy->minimum_linkrate = _transport_convert_phy_link_rate(
 768             expander_pg1.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
 769         phy->maximum_linkrate = _transport_convert_phy_link_rate(
 770             expander_pg1.ProgrammedLinkRate >> 4);
 771
 772         if ((sas_phy_add(phy))) {
 773                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 774                     ioc->name, __FILE__, __LINE__, __func__);
 775                 sas_phy_free(phy);
 776                 return -1;
 777         }
 778         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 779                 dev_printk(KERN_INFO, &phy->dev,
 780                     "add: handle(0x%04x), sas_addr(0x%016llx)\n"
 781                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
 782                     mpt2sas_phy->handle, (unsigned long long)
 783                     mpt2sas_phy->identify.sas_address,
 784                     mpt2sas_phy->attached_handle,
 785                     (unsigned long long)
 786                     mpt2sas_phy->remote_identify.sas_address);
 787         mpt2sas_phy->phy = phy;
 788         return 0;
 789 }
 790
 791 /**
 792  * mpt2sas_transport_update_phy_link_change - refreshing phy link changes and attached devices
 793  * @ioc: per adapter object
 794  * @handle: handle to sas_host or expander
 795  * @attached_handle: attached device handle
 796  * @phy_numberv: phy number
 797  * @link_rate: new link rate
 798  *
 799  * Returns nothing.
 800  */
 801 void
 802 mpt2sas_transport_update_phy_link_change(struct MPT2SAS_ADAPTER *ioc,
 803     u16 handle, u16 attached_handle, u8 phy_number, u8 link_rate)
 804 {
 805         unsigned long flags;
 806         struct _sas_node *sas_node;
 807         struct _sas_phy *mpt2sas_phy;
 808
 809         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 810         sas_node = _transport_sas_node_find_by_handle(ioc, handle);
 811         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 812         if (!sas_node)
 813                 return;
 814
 815         mpt2sas_phy = &sas_node->phy[phy_number];
 816         mpt2sas_phy->attached_handle = attached_handle;
 817         if (attached_handle && (link_rate >= MPI2_SAS_NEG_LINK_RATE_1_5))
 818                 _transport_set_identify(ioc, mpt2sas_phy->attached_handle,
 819                     &mpt2sas_phy->remote_identify);
 820         else
 821                 memset(&mpt2sas_phy->remote_identify, 0 , sizeof(struct
 822                     sas_identify));
 823
 824         if (mpt2sas_phy->phy)
 825                 mpt2sas_phy->phy->negotiated_linkrate =
 826                     _transport_convert_phy_link_rate(link_rate);
 827
 828         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 829                 dev_printk(KERN_INFO, &mpt2sas_phy->phy->dev,
 830                     "refresh: handle(0x%04x), sas_addr(0x%016llx),\n"
 831                     "\tlink_rate(0x%02x), phy(%d)\n"
 832                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
 833                     handle, (unsigned long long)
 834                     mpt2sas_phy->identify.sas_address, link_rate,
 835                     phy_number, attached_handle,
 836                     (unsigned long long)
 837                     mpt2sas_phy->remote_identify.sas_address);
 838 }
 839
 840 static inline void *
 841 phy_to_ioc(struct sas_phy *phy)
 842 {
 843         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 844         return shost_priv(shost);
 845 }
 846
 847 static inline void *
 848 rphy_to_ioc(struct sas_rphy *rphy)
 849 {
 850         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
 851         return shost_priv(shost);
 852 }
 853
 854 /**
 855  * transport_get_linkerrors -
 856  * @phy: The sas phy object
 857  *
 858  * Only support sas_host direct attached phys.
 859  * Returns 0 for success, non-zero for failure.
 860  *
 861  */
 862 static int
 863 transport_get_linkerrors(struct sas_phy *phy)
 864 {
 865         struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
 866         struct _sas_phy *mpt2sas_phy;
 867         Mpi2ConfigReply_t mpi_reply;
 868         Mpi2SasPhyPage1_t phy_pg1;
 869         int i;
 870
 871         for (i = 0, mpt2sas_phy = NULL; i < ioc->sas_hba.num_phys &&
 872             !mpt2sas_phy; i++) {
 873                 if (ioc->sas_hba.phy[i].phy != phy)
 874                         continue;
 875                 mpt2sas_phy = &ioc->sas_hba.phy[i];
 876         }
 877
 878         if (!mpt2sas_phy) /* this phy not on sas_host */
 879                 return -EINVAL;
 880
 881         if ((mpt2sas_config_get_phy_pg1(ioc, &mpi_reply, &phy_pg1,
 882                     mpt2sas_phy->phy_id))) {
 883                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 884                     ioc->name, __FILE__, __LINE__, __func__);
 885                 return -ENXIO;
 886         }
 887
 888         if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo)
 889                 printk(MPT2SAS_INFO_FMT "phy(%d), ioc_status"
 890                     "(0x%04x), loginfo(0x%08x)\n", ioc->name,
 891                     mpt2sas_phy->phy_id,
 892                     le16_to_cpu(mpi_reply.IOCStatus),
 893                     le32_to_cpu(mpi_reply.IOCLogInfo));
 894
 895         phy->invalid_dword_count = le32_to_cpu(phy_pg1.InvalidDwordCount);
 896         phy->running_disparity_error_count =
 897             le32_to_cpu(phy_pg1.RunningDisparityErrorCount);
 898         phy->loss_of_dword_sync_count =
 899             le32_to_cpu(phy_pg1.LossDwordSynchCount);
 900         phy->phy_reset_problem_count =
 901             le32_to_cpu(phy_pg1.PhyResetProblemCount);
 902         return 0;
 903 }
 904
 905 /**
 906  * transport_get_enclosure_identifier -
 907  * @phy: The sas phy object
 908  *
 909  * Obtain the enclosure logical id for an expander.
 910  * Returns 0 for success, non-zero for failure.
 911  */
 912 static int
 913 transport_get_enclosure_identifier(struct sas_rphy *rphy, u64 *identifier)
 914 {
 915         struct MPT2SAS_ADAPTER *ioc = rphy_to_ioc(rphy);
 916         struct _sas_node *sas_expander;
 917         unsigned long flags;
 918
 919         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 920         sas_expander = mpt2sas_scsih_expander_find_by_sas_address(ioc,
 921             rphy->identify.sas_address);
 922         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 923
 924         if (!sas_expander)
 925                 return -ENXIO;
 926
 927         *identifier = sas_expander->enclosure_logical_id;
 928         return 0;
 929 }
 930
 931 /**
 932  * transport_get_bay_identifier -
 933  * @phy: The sas phy object
 934  *
 935  * Returns the slot id for a device that resides inside an enclosure.
 936  */
 937 static int
 938 transport_get_bay_identifier(struct sas_rphy *rphy)
 939 {
 940         struct MPT2SAS_ADAPTER *ioc = rphy_to_ioc(rphy);
 941         struct _sas_device *sas_device;
 942         unsigned long flags;
 943
 944         spin_lock_irqsave(&ioc->sas_device_lock, flags);
 945         sas_device = mpt2sas_scsih_sas_device_find_by_sas_address(ioc,
 946             rphy->identify.sas_address);
 947         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
 948
 949         if (!sas_device)
 950                 return -ENXIO;
 951
 952         return sas_device->slot;
 953 }
 954
 955 /**
 956  * transport_phy_reset -
 957  * @phy: The sas phy object
 958  * @hard_reset:
 959  *
 960  * Only support sas_host direct attached phys.
 961  * Returns 0 for success, non-zero for failure.
 962  */
 963 static int
 964 transport_phy_reset(struct sas_phy *phy, int hard_reset)
 965 {
 966         struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
 967         struct _sas_phy *mpt2sas_phy;
 968         Mpi2SasIoUnitControlReply_t mpi_reply;
 969         Mpi2SasIoUnitControlRequest_t mpi_request;
 970         int i;
 971
 972         for (i = 0, mpt2sas_phy = NULL; i < ioc->sas_hba.num_phys &&
 973             !mpt2sas_phy; i++) {
 974                 if (ioc->sas_hba.phy[i].phy != phy)
 975                         continue;
 976                 mpt2sas_phy = &ioc->sas_hba.phy[i];
 977         }
 978
 979         if (!mpt2sas_phy) /* this phy not on sas_host */
 980                 return -EINVAL;
 981
 982         memset(&mpi_request, 0, sizeof(Mpi2SasIoUnitControlReply_t));
 983         mpi_request.Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
 984         mpi_request.Operation = hard_reset ?
 985             MPI2_SAS_OP_PHY_HARD_RESET : MPI2_SAS_OP_PHY_LINK_RESET;
 986         mpi_request.PhyNum = mpt2sas_phy->phy_id;
 987
 988         if ((mpt2sas_base_sas_iounit_control(ioc, &mpi_reply, &mpi_request))) {
 989                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 990                     ioc->name, __FILE__, __LINE__, __func__);
 991                 return -ENXIO;
 992         }
 993
 994         if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo)
 995                 printk(MPT2SAS_INFO_FMT "phy(%d), ioc_status"
 996                     "(0x%04x), loginfo(0x%08x)\n", ioc->name,
 997                     mpt2sas_phy->phy_id,
 998                     le16_to_cpu(mpi_reply.IOCStatus),
 999                     le32_to_cpu(mpi_reply.IOCLogInfo));
1000
1001         return 0;
1002 }
1003
1004 /**
1005  * transport_smp_handler - transport portal for smp passthru
1006  * @shost: shost object
1007  * @rphy: sas transport rphy object
1008  * @req:
1009  *
1010  * This used primarily for smp_utils.
1011  * Example:
1012  *           smp_rep_general /sys/class/bsg/expander-5:0
1013  */
1014 static int
1015 transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
1016     struct request *req)
1017 {
1018         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
1019         Mpi2SmpPassthroughRequest_t *mpi_request;
1020         Mpi2SmpPassthroughReply_t *mpi_reply;
1021         int rc;
1022         u16 smid;
1023         u32 ioc_state;
1024         unsigned long timeleft;
1025         void *psge;
1026         u32 sgl_flags;
1027         u8 issue_reset = 0;
1028         unsigned long flags;
1029         dma_addr_t dma_addr_in = 0;
1030         dma_addr_t dma_addr_out = 0;
1031         u16 wait_state_count;
1032         struct request *rsp = req->next_rq;
1033
1034         if (!rsp) {
1035                 printk(MPT2SAS_ERR_FMT "%s: the smp response space is "
1036                     "missing\n", ioc->name, __func__);
1037                 return -EINVAL;
1038         }
1039
1040         /* do we need to support multiple segments? */
1041         if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
1042                 printk(MPT2SAS_ERR_FMT "%s: multiple segments req %u %u, "
1043                     "rsp %u %u\n", ioc->name, __func__, req->bio->bi_vcnt,
1044                     req->data_len, rsp->bio->bi_vcnt, rsp->data_len);
1045                 return -EINVAL;
1046         }
1047
1048         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
1049         if (ioc->ioc_reset_in_progress) {
1050                 spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
1051                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
1052                     __func__, ioc->name);
1053                 return -EFAULT;
1054         }
1055         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
1056
1057         rc = mutex_lock_interruptible(&ioc->transport_cmds.mutex);
1058         if (rc)
1059                 return rc;
1060
1061         if (ioc->transport_cmds.status != MPT2_CMD_NOT_USED) {
1062                 printk(MPT2SAS_ERR_FMT "%s: transport_cmds in use\n", ioc->name,
1063                     __func__);
1064                 rc = -EAGAIN;
1065                 goto out;
1066         }
1067         ioc->transport_cmds.status = MPT2_CMD_PENDING;
1068
1069         wait_state_count = 0;
1070         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1071         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1072                 if (wait_state_count++ == 10) {
1073                         printk(MPT2SAS_ERR_FMT
1074                             "%s: failed due to ioc not operational\n",
1075                             ioc->name, __func__);
1076                         rc = -EFAULT;
1077                         goto out;
1078                 }
1079                 ssleep(1);
1080                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1081                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
1082                     "operational state(count=%d)\n", ioc->name,
1083                     __func__, wait_state_count);
1084         }
1085         if (wait_state_count)
1086                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
1087                     ioc->name, __func__);
1088
1089         smid = mpt2sas_base_get_smid(ioc, ioc->transport_cb_idx);
1090         if (!smid) {
1091                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
1092                     ioc->name, __func__);
1093                 rc = -EAGAIN;
1094                 goto out;
1095         }
1096
1097         rc = 0;
1098         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
1099         ioc->transport_cmds.smid = smid;
1100
1101         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
1102         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
1103         mpi_request->PhysicalPort = 0xFF;
1104         *((u64 *)&mpi_request->SASAddress) = (rphy) ?
1105             cpu_to_le64(rphy->identify.sas_address) :
1106             cpu_to_le64(ioc->sas_hba.sas_address);
1107         mpi_request->RequestDataLength = cpu_to_le16(req->data_len - 4);
1108         psge = &mpi_request->SGL;
1109
1110         /* WRITE sgel first */
1111         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
1112             MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
1113         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
1114         dma_addr_out = pci_map_single(ioc->pdev, bio_data(req->bio),
1115               req->data_len, PCI_DMA_BIDIRECTIONAL);
1116         if (!dma_addr_out) {
1117                 mpt2sas_base_free_smid(ioc, le16_to_cpu(smid));
1118                 goto unmap;
1119         }
1120
1121         ioc->base_add_sg_single(psge, sgl_flags | (req->data_len - 4),
1122             dma_addr_out);
1123
1124         /* incr sgel */
1125         psge += ioc->sge_size;
1126
1127         /* READ sgel last */
1128         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
1129             MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
1130             MPI2_SGE_FLAGS_END_OF_LIST);
1131         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
1132         dma_addr_in =  pci_map_single(ioc->pdev, bio_data(rsp->bio),
1133               rsp->data_len, PCI_DMA_BIDIRECTIONAL);
1134         if (!dma_addr_in) {
1135                 mpt2sas_base_free_smid(ioc, le16_to_cpu(smid));
1136                 goto unmap;
1137         }
1138
1139         ioc->base_add_sg_single(psge, sgl_flags | (rsp->data_len + 4),
1140             dma_addr_in);
1141
1142         dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s - "
1143             "sending smp request\n", ioc->name, __func__));
1144
1145         mpt2sas_base_put_smid_default(ioc, smid, 0 /* VF_ID */);
1146         timeleft = wait_for_completion_timeout(&ioc->transport_cmds.done,
1147             10*HZ);
1148
1149         if (!(ioc->transport_cmds.status & MPT2_CMD_COMPLETE)) {
1150                 printk(MPT2SAS_ERR_FMT "%s : timeout\n",
1151                     __func__, ioc->name);
1152                 _debug_dump_mf(mpi_request,
1153                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
1154                 if (!(ioc->transport_cmds.status & MPT2_CMD_RESET))
1155                         issue_reset = 1;
1156                 goto issue_host_reset;
1157         }
1158
1159         dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s - "
1160             "complete\n", ioc->name, __func__));
1161
1162         if (ioc->transport_cmds.status & MPT2_CMD_REPLY_VALID) {
1163
1164                 mpi_reply = ioc->transport_cmds.reply;
1165
1166                 dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT
1167                     "%s - reply data transfer size(%d)\n",
1168                     ioc->name, __func__,
1169                     le16_to_cpu(mpi_reply->ResponseDataLength)));
1170
1171                 memcpy(req->sense, mpi_reply, sizeof(*mpi_reply));
1172                 req->sense_len = sizeof(*mpi_reply);
1173                 rsp->resid_len = rsp->data_len - mpi_reply->ResponseDataLength;
1174         } else {
1175                 dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT
1176                     "%s - no reply\n", ioc->name, __func__));
1177                 rc = -ENXIO;
1178         }
1179
1180  issue_host_reset:
1181         if (issue_reset) {
1182                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1183                     FORCE_BIG_HAMMER);
1184                 rc = -ETIMEDOUT;
1185         }
1186
1187  unmap:
1188         if (dma_addr_out)
1189                 pci_unmap_single(ioc->pdev, dma_addr_out, req->data_len,
1190                     PCI_DMA_BIDIRECTIONAL);
1191         if (dma_addr_in)
1192                 pci_unmap_single(ioc->pdev, dma_addr_in, rsp->data_len,
1193                     PCI_DMA_BIDIRECTIONAL);
1194
1195  out:
1196         ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
1197         mutex_unlock(&ioc->transport_cmds.mutex);
1198         return rc;
1199 }
1200
1201 struct sas_function_template mpt2sas_transport_functions = {
1202         .get_linkerrors         = transport_get_linkerrors,
1203         .get_enclosure_identifier = transport_get_enclosure_identifier,
1204         .get_bay_identifier     = transport_get_bay_identifier,
1205         .phy_reset              = transport_phy_reset,
1206         .smp_handler            = transport_smp_handler,
1207 };
1208
1209 struct scsi_transport_template *mpt2sas_transport_template;