kernel/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) 2007-2014  LSI Corporation
   6  * Copyright (C) 20013-2014 Avago Technologies
   7  *  (mailto: MPT-FusionLinux.pdl@avagotech.com)
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * NO WARRANTY
  20  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  21  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  22  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  23  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  24  * solely responsible for determining the appropriateness of using and
  25  * distributing the Program and assumes all risks associated with its
  26  * exercise of rights under this Agreement, including but not limited to
  27  * the risks and costs of program errors, damage to or loss of data,
  28  * programs or equipment, and unavailability or interruption of operations.
  29
  30  * DISCLAIMER OF LIABILITY
  31  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  32  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  34  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  35  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  36  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  37  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  38
  39  * You should have received a copy of the GNU General Public License
  40  * along with this program; if not, write to the Free Software
  41  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  42  * USA.
  43  */
  44
  45 #include <linux/module.h>
  46 #include <linux/kernel.h>
  47 #include <linux/init.h>
  48 #include <linux/errno.h>
  49 #include <linux/sched.h>
  50 #include <linux/workqueue.h>
  51 #include <linux/delay.h>
  52 #include <linux/pci.h>
  53 #include <linux/slab.h>
  54
  55 #include <scsi/scsi.h>
  56 #include <scsi/scsi_cmnd.h>
  57 #include <scsi/scsi_device.h>
  58 #include <scsi/scsi_host.h>
  59 #include <scsi/scsi_transport_sas.h>
  60 #include <scsi/scsi_dbg.h>
  61
  62 #include "mpt2sas_base.h"
  63 /**
  64  * _transport_sas_node_find_by_sas_address - sas node search
  65  * @ioc: per adapter object
  66  * @sas_address: sas address of expander or sas host
  67  * Context: Calling function should acquire ioc->sas_node_lock.
  68  *
  69  * Search for either hba phys or expander device based on handle, then returns
  70  * the sas_node object.
  71  */
  72 static struct _sas_node *
  73 _transport_sas_node_find_by_sas_address(struct MPT2SAS_ADAPTER *ioc,
  74     u64 sas_address)
  75 {
  76         if (ioc->sas_hba.sas_address == sas_address)
  77                 return &ioc->sas_hba;
  78         else
  79                 return mpt2sas_scsih_expander_find_by_sas_address(ioc,
  80                     sas_address);
  81 }
  82
  83 /**
  84  * _transport_convert_phy_link_rate -
  85  * @link_rate: link rate returned from mpt firmware
  86  *
  87  * Convert link_rate from mpi fusion into sas_transport form.
  88  */
  89 static enum sas_linkrate
  90 _transport_convert_phy_link_rate(u8 link_rate)
  91 {
  92         enum sas_linkrate rc;
  93
  94         switch (link_rate) {
  95         case MPI2_SAS_NEG_LINK_RATE_1_5:
  96                 rc = SAS_LINK_RATE_1_5_GBPS;
  97                 break;
  98         case MPI2_SAS_NEG_LINK_RATE_3_0:
  99                 rc = SAS_LINK_RATE_3_0_GBPS;
 100                 break;
 101         case MPI2_SAS_NEG_LINK_RATE_6_0:
 102                 rc = SAS_LINK_RATE_6_0_GBPS;
 103                 break;
 104         case MPI2_SAS_NEG_LINK_RATE_PHY_DISABLED:
 105                 rc = SAS_PHY_DISABLED;
 106                 break;
 107         case MPI2_SAS_NEG_LINK_RATE_NEGOTIATION_FAILED:
 108                 rc = SAS_LINK_RATE_FAILED;
 109                 break;
 110         case MPI2_SAS_NEG_LINK_RATE_PORT_SELECTOR:
 111                 rc = SAS_SATA_PORT_SELECTOR;
 112                 break;
 113         case MPI2_SAS_NEG_LINK_RATE_SMP_RESET_IN_PROGRESS:
 114                 rc = SAS_PHY_RESET_IN_PROGRESS;
 115                 break;
 116         default:
 117         case MPI2_SAS_NEG_LINK_RATE_SATA_OOB_COMPLETE:
 118         case MPI2_SAS_NEG_LINK_RATE_UNKNOWN_LINK_RATE:
 119                 rc = SAS_LINK_RATE_UNKNOWN;
 120                 break;
 121         }
 122         return rc;
 123 }
 124
 125 /**
 126  * _transport_set_identify - set identify for phys and end devices
 127  * @ioc: per adapter object
 128  * @handle: device handle
 129  * @identify: sas identify info
 130  *
 131  * Populates sas identify info.
 132  *
 133  * Returns 0 for success, non-zero for failure.
 134  */
 135 static int
 136 _transport_set_identify(struct MPT2SAS_ADAPTER *ioc, u16 handle,
 137     struct sas_identify *identify)
 138 {
 139         Mpi2SasDevicePage0_t sas_device_pg0;
 140         Mpi2ConfigReply_t mpi_reply;
 141         u32 device_info;
 142         u32 ioc_status;
 143
 144         if (ioc->shost_recovery || ioc->pci_error_recovery) {
 145                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
 146                     __func__, ioc->name);
 147                 return -EFAULT;
 148         }
 149
 150         if ((mpt2sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
 151             MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, handle))) {
 152                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 153
 154                     ioc->name, __FILE__, __LINE__, __func__);
 155                 return -ENXIO;
 156         }
 157
 158         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
 159             MPI2_IOCSTATUS_MASK;
 160         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
 161                 printk(MPT2SAS_ERR_FMT "handle(0x%04x), ioc_status(0x%04x)"
 162                     "\nfailure at %s:%d/%s()!\n", ioc->name, handle, ioc_status,
 163                      __FILE__, __LINE__, __func__);
 164                 return -EIO;
 165         }
 166
 167         memset(identify, 0, sizeof(struct sas_identify));
 168         device_info = le32_to_cpu(sas_device_pg0.DeviceInfo);
 169
 170         /* sas_address */
 171         identify->sas_address = le64_to_cpu(sas_device_pg0.SASAddress);
 172
 173         /* phy number of the parent device this device is linked to */
 174         identify->phy_identifier = sas_device_pg0.PhyNum;
 175
 176         /* device_type */
 177         switch (device_info & MPI2_SAS_DEVICE_INFO_MASK_DEVICE_TYPE) {
 178         case MPI2_SAS_DEVICE_INFO_NO_DEVICE:
 179                 identify->device_type = SAS_PHY_UNUSED;
 180                 break;
 181         case MPI2_SAS_DEVICE_INFO_END_DEVICE:
 182                 identify->device_type = SAS_END_DEVICE;
 183                 break;
 184         case MPI2_SAS_DEVICE_INFO_EDGE_EXPANDER:
 185                 identify->device_type = SAS_EDGE_EXPANDER_DEVICE;
 186                 break;
 187         case MPI2_SAS_DEVICE_INFO_FANOUT_EXPANDER:
 188                 identify->device_type = SAS_FANOUT_EXPANDER_DEVICE;
 189                 break;
 190         }
 191
 192         /* initiator_port_protocols */
 193         if (device_info & MPI2_SAS_DEVICE_INFO_SSP_INITIATOR)
 194                 identify->initiator_port_protocols |= SAS_PROTOCOL_SSP;
 195         if (device_info & MPI2_SAS_DEVICE_INFO_STP_INITIATOR)
 196                 identify->initiator_port_protocols |= SAS_PROTOCOL_STP;
 197         if (device_info & MPI2_SAS_DEVICE_INFO_SMP_INITIATOR)
 198                 identify->initiator_port_protocols |= SAS_PROTOCOL_SMP;
 199         if (device_info & MPI2_SAS_DEVICE_INFO_SATA_HOST)
 200                 identify->initiator_port_protocols |= SAS_PROTOCOL_SATA;
 201
 202         /* target_port_protocols */
 203         if (device_info & MPI2_SAS_DEVICE_INFO_SSP_TARGET)
 204                 identify->target_port_protocols |= SAS_PROTOCOL_SSP;
 205         if (device_info & MPI2_SAS_DEVICE_INFO_STP_TARGET)
 206                 identify->target_port_protocols |= SAS_PROTOCOL_STP;
 207         if (device_info & MPI2_SAS_DEVICE_INFO_SMP_TARGET)
 208                 identify->target_port_protocols |= SAS_PROTOCOL_SMP;
 209         if (device_info & MPI2_SAS_DEVICE_INFO_SATA_DEVICE)
 210                 identify->target_port_protocols |= SAS_PROTOCOL_SATA;
 211
 212         return 0;
 213 }
 214
 215 /**
 216  * mpt2sas_transport_done -  internal transport layer callback handler.
 217  * @ioc: per adapter object
 218  * @smid: system request message index
 219  * @msix_index: MSIX table index supplied by the OS
 220  * @reply: reply message frame(lower 32bit addr)
 221  *
 222  * Callback handler when sending internal generated transport cmds.
 223  * The callback index passed is `ioc->transport_cb_idx`
 224  *
 225  * Return 1 meaning mf should be freed from _base_interrupt
 226  *        0 means the mf is freed from this function.
 227  */
 228 u8
 229 mpt2sas_transport_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
 230     u32 reply)
 231 {
 232         MPI2DefaultReply_t *mpi_reply;
 233
 234         mpi_reply =  mpt2sas_base_get_reply_virt_addr(ioc, reply);
 235         if (ioc->transport_cmds.status == MPT2_CMD_NOT_USED)
 236                 return 1;
 237         if (ioc->transport_cmds.smid != smid)
 238                 return 1;
 239         ioc->transport_cmds.status |= MPT2_CMD_COMPLETE;
 240         if (mpi_reply) {
 241                 memcpy(ioc->transport_cmds.reply, mpi_reply,
 242                     mpi_reply->MsgLength*4);
 243                 ioc->transport_cmds.status |= MPT2_CMD_REPLY_VALID;
 244         }
 245         ioc->transport_cmds.status &= ~MPT2_CMD_PENDING;
 246         complete(&ioc->transport_cmds.done);
 247         return 1;
 248 }
 249
 250 /* report manufacture request structure */
 251 struct rep_manu_request{
 252         u8 smp_frame_type;
 253         u8 function;
 254         u8 reserved;
 255         u8 request_length;
 256 };
 257
 258 /* report manufacture reply structure */
 259 struct rep_manu_reply{
 260         u8 smp_frame_type; /* 0x41 */
 261         u8 function; /* 0x01 */
 262         u8 function_result;
 263         u8 response_length;
 264         u16 expander_change_count;
 265         u8 reserved0[2];
 266         u8 sas_format;
 267         u8 reserved2[3];
 268         u8 vendor_id[SAS_EXPANDER_VENDOR_ID_LEN];
 269         u8 product_id[SAS_EXPANDER_PRODUCT_ID_LEN];
 270         u8 product_rev[SAS_EXPANDER_PRODUCT_REV_LEN];
 271         u8 component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN];
 272         u16 component_id;
 273         u8 component_revision_id;
 274         u8 reserved3;
 275         u8 vendor_specific[8];
 276 };
 277
 278 /**
 279  * _transport_expander_report_manufacture - obtain SMP report_manufacture
 280  * @ioc: per adapter object
 281  * @sas_address: expander sas address
 282  * @edev: the sas_expander_device object
 283  *
 284  * Fills in the sas_expander_device object when SMP port is created.
 285  *
 286  * Returns 0 for success, non-zero for failure.
 287  */
 288 static int
 289 _transport_expander_report_manufacture(struct MPT2SAS_ADAPTER *ioc,
 290     u64 sas_address, struct sas_expander_device *edev)
 291 {
 292         Mpi2SmpPassthroughRequest_t *mpi_request;
 293         Mpi2SmpPassthroughReply_t *mpi_reply;
 294         struct rep_manu_reply *manufacture_reply;
 295         struct rep_manu_request *manufacture_request;
 296         int rc;
 297         u16 smid;
 298         u32 ioc_state;
 299         unsigned long timeleft;
 300         void *psge;
 301         u32 sgl_flags;
 302         u8 issue_reset = 0;
 303         void *data_out = NULL;
 304         dma_addr_t data_out_dma;
 305         u32 sz;
 306         u16 wait_state_count;
 307
 308         if (ioc->shost_recovery || ioc->pci_error_recovery) {
 309                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
 310                     __func__, ioc->name);
 311                 return -EFAULT;
 312         }
 313
 314         mutex_lock(&ioc->transport_cmds.mutex);
 315
 316         if (ioc->transport_cmds.status != MPT2_CMD_NOT_USED) {
 317                 printk(MPT2SAS_ERR_FMT "%s: transport_cmds in use\n",
 318                     ioc->name, __func__);
 319                 rc = -EAGAIN;
 320                 goto out;
 321         }
 322         ioc->transport_cmds.status = MPT2_CMD_PENDING;
 323
 324         wait_state_count = 0;
 325         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 326         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
 327                 if (wait_state_count++ == 10) {
 328                         printk(MPT2SAS_ERR_FMT
 329                             "%s: failed due to ioc not operational\n",
 330                             ioc->name, __func__);
 331                         rc = -EFAULT;
 332                         goto out;
 333                 }
 334                 ssleep(1);
 335                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 336                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
 337                     "operational state(count=%d)\n", ioc->name,
 338                     __func__, wait_state_count);
 339         }
 340         if (wait_state_count)
 341                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
 342                     ioc->name, __func__);
 343
 344         smid = mpt2sas_base_get_smid(ioc, ioc->transport_cb_idx);
 345         if (!smid) {
 346                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 347                     ioc->name, __func__);
 348                 rc = -EAGAIN;
 349                 goto out;
 350         }
 351
 352         rc = 0;
 353         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
 354         ioc->transport_cmds.smid = smid;
 355
 356         sz = sizeof(struct rep_manu_request) + sizeof(struct rep_manu_reply);
 357         data_out = pci_alloc_consistent(ioc->pdev, sz, &data_out_dma);
 358
 359         if (!data_out) {
 360                 printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 361                     __LINE__, __func__);
 362                 rc = -ENOMEM;
 363                 mpt2sas_base_free_smid(ioc, smid);
 364                 goto out;
 365         }
 366
 367         manufacture_request = data_out;
 368         manufacture_request->smp_frame_type = 0x40;
 369         manufacture_request->function = 1;
 370         manufacture_request->reserved = 0;
 371         manufacture_request->request_length = 0;
 372
 373         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
 374         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
 375         mpi_request->PhysicalPort = 0xFF;
 376         mpi_request->VF_ID = 0; /* TODO */
 377         mpi_request->VP_ID = 0;
 378         mpi_request->SASAddress = cpu_to_le64(sas_address);
 379         mpi_request->RequestDataLength =
 380             cpu_to_le16(sizeof(struct rep_manu_request));
 381         psge = &mpi_request->SGL;
 382
 383         /* WRITE sgel first */
 384         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 385             MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
 386         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 387         ioc->base_add_sg_single(psge, sgl_flags |
 388             sizeof(struct rep_manu_request), data_out_dma);
 389
 390         /* incr sgel */
 391         psge += ioc->sge_size;
 392
 393         /* READ sgel last */
 394         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 395             MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 396             MPI2_SGE_FLAGS_END_OF_LIST);
 397         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 398         ioc->base_add_sg_single(psge, sgl_flags |
 399             sizeof(struct rep_manu_reply), data_out_dma +
 400             sizeof(struct rep_manu_request));
 401
 402         dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "report_manufacture - "
 403             "send to sas_addr(0x%016llx)\n", ioc->name,
 404             (unsigned long long)sas_address));
 405         init_completion(&ioc->transport_cmds.done);
 406         mpt2sas_base_put_smid_default(ioc, smid);
 407         timeleft = wait_for_completion_timeout(&ioc->transport_cmds.done,
 408             10*HZ);
 409
 410         if (!(ioc->transport_cmds.status & MPT2_CMD_COMPLETE)) {
 411                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
 412                     ioc->name, __func__);
 413                 _debug_dump_mf(mpi_request,
 414                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
 415                 if (!(ioc->transport_cmds.status & MPT2_CMD_RESET))
 416                         issue_reset = 1;
 417                 goto issue_host_reset;
 418         }
 419
 420         dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "report_manufacture - "
 421             "complete\n", ioc->name));
 422
 423         if (ioc->transport_cmds.status & MPT2_CMD_REPLY_VALID) {
 424                 u8 *tmp;
 425
 426                 mpi_reply = ioc->transport_cmds.reply;
 427
 428                 dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
 429                     "report_manufacture - reply data transfer size(%d)\n",
 430                     ioc->name, le16_to_cpu(mpi_reply->ResponseDataLength)));
 431
 432                 if (le16_to_cpu(mpi_reply->ResponseDataLength) !=
 433                     sizeof(struct rep_manu_reply))
 434                         goto out;
 435
 436                 manufacture_reply = data_out + sizeof(struct rep_manu_request);
 437                 strncpy(edev->vendor_id, manufacture_reply->vendor_id,
 438                      SAS_EXPANDER_VENDOR_ID_LEN);
 439                 strncpy(edev->product_id, manufacture_reply->product_id,
 440                      SAS_EXPANDER_PRODUCT_ID_LEN);
 441                 strncpy(edev->product_rev, manufacture_reply->product_rev,
 442                      SAS_EXPANDER_PRODUCT_REV_LEN);
 443                 edev->level = manufacture_reply->sas_format & 1;
 444                 if (edev->level) {
 445                         strncpy(edev->component_vendor_id,
 446                             manufacture_reply->component_vendor_id,
 447                              SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
 448                         tmp = (u8 *)&manufacture_reply->component_id;
 449                         edev->component_id = tmp[0] << 8 | tmp[1];
 450                         edev->component_revision_id =
 451                             manufacture_reply->component_revision_id;
 452                 }
 453         } else
 454                 dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
 455                     "report_manufacture - no reply\n", ioc->name));
 456
 457  issue_host_reset:
 458         if (issue_reset)
 459                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 460                     FORCE_BIG_HAMMER);
 461  out:
 462         ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
 463         if (data_out)
 464                 pci_free_consistent(ioc->pdev, sz, data_out, data_out_dma);
 465
 466         mutex_unlock(&ioc->transport_cmds.mutex);
 467         return rc;
 468 }
 469
 470 /**
 471  * _transport_delete_port - helper function to removing a port
 472  * @ioc: per adapter object
 473  * @mpt2sas_port: mpt2sas per port object
 474  *
 475  * Returns nothing.
 476  */
 477 static void
 478 _transport_delete_port(struct MPT2SAS_ADAPTER *ioc,
 479         struct _sas_port *mpt2sas_port)
 480 {
 481         u64 sas_address = mpt2sas_port->remote_identify.sas_address;
 482         enum sas_device_type device_type =
 483             mpt2sas_port->remote_identify.device_type;
 484
 485         dev_printk(KERN_INFO, &mpt2sas_port->port->dev,
 486             "remove: sas_addr(0x%016llx)\n",
 487             (unsigned long long) sas_address);
 488
 489         ioc->logging_level |= MPT_DEBUG_TRANSPORT;
 490         if (device_type == SAS_END_DEVICE)
 491                 mpt2sas_device_remove_by_sas_address(ioc, sas_address);
 492         else if (device_type == SAS_EDGE_EXPANDER_DEVICE ||
 493             device_type == SAS_FANOUT_EXPANDER_DEVICE)
 494                 mpt2sas_expander_remove(ioc, sas_address);
 495         ioc->logging_level &= ~MPT_DEBUG_TRANSPORT;
 496 }
 497
 498 /**
 499  * _transport_delete_phy - helper function to removing single phy from port
 500  * @ioc: per adapter object
 501  * @mpt2sas_port: mpt2sas per port object
 502  * @mpt2sas_phy: mpt2sas per phy object
 503  *
 504  * Returns nothing.
 505  */
 506 static void
 507 _transport_delete_phy(struct MPT2SAS_ADAPTER *ioc,
 508         struct _sas_port *mpt2sas_port, struct _sas_phy *mpt2sas_phy)
 509 {
 510         u64 sas_address = mpt2sas_port->remote_identify.sas_address;
 511
 512         dev_printk(KERN_INFO, &mpt2sas_phy->phy->dev,
 513             "remove: sas_addr(0x%016llx), phy(%d)\n",
 514             (unsigned long long) sas_address, mpt2sas_phy->phy_id);
 515
 516         list_del(&mpt2sas_phy->port_siblings);
 517         mpt2sas_port->num_phys--;
 518         sas_port_delete_phy(mpt2sas_port->port, mpt2sas_phy->phy);
 519         mpt2sas_phy->phy_belongs_to_port = 0;
 520 }
 521
 522 /**
 523  * _transport_add_phy - helper function to adding single phy to port
 524  * @ioc: per adapter object
 525  * @mpt2sas_port: mpt2sas per port object
 526  * @mpt2sas_phy: mpt2sas per phy object
 527  *
 528  * Returns nothing.
 529  */
 530 static void
 531 _transport_add_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_port *mpt2sas_port,
 532         struct _sas_phy *mpt2sas_phy)
 533 {
 534         u64 sas_address = mpt2sas_port->remote_identify.sas_address;
 535
 536         dev_printk(KERN_INFO, &mpt2sas_phy->phy->dev,
 537             "add: sas_addr(0x%016llx), phy(%d)\n", (unsigned long long)
 538             sas_address, mpt2sas_phy->phy_id);
 539
 540         list_add_tail(&mpt2sas_phy->port_siblings, &mpt2sas_port->phy_list);
 541         mpt2sas_port->num_phys++;
 542         sas_port_add_phy(mpt2sas_port->port, mpt2sas_phy->phy);
 543         mpt2sas_phy->phy_belongs_to_port = 1;
 544 }
 545
 546 /**
 547  * _transport_add_phy_to_an_existing_port - adding new phy to existing port
 548  * @ioc: per adapter object
 549  * @sas_node: sas node object (either expander or sas host)
 550  * @mpt2sas_phy: mpt2sas per phy object
 551  * @sas_address: sas address of device/expander were phy needs to be added to
 552  *
 553  * Returns nothing.
 554  */
 555 static void
 556 _transport_add_phy_to_an_existing_port(struct MPT2SAS_ADAPTER *ioc,
 557 struct _sas_node *sas_node, struct _sas_phy *mpt2sas_phy, u64 sas_address)
 558 {
 559         struct _sas_port *mpt2sas_port;
 560         struct _sas_phy *phy_srch;
 561
 562         if (mpt2sas_phy->phy_belongs_to_port == 1)
 563                 return;
 564
 565         list_for_each_entry(mpt2sas_port, &sas_node->sas_port_list,
 566             port_list) {
 567                 if (mpt2sas_port->remote_identify.sas_address !=
 568                     sas_address)
 569                         continue;
 570                 list_for_each_entry(phy_srch, &mpt2sas_port->phy_list,
 571                     port_siblings) {
 572                         if (phy_srch == mpt2sas_phy)
 573                                 return;
 574                 }
 575                 _transport_add_phy(ioc, mpt2sas_port, mpt2sas_phy);
 576                         return;
 577         }
 578
 579 }
 580
 581 /**
 582  * _transport_del_phy_from_an_existing_port - delete phy from existing port
 583  * @ioc: per adapter object
 584  * @sas_node: sas node object (either expander or sas host)
 585  * @mpt2sas_phy: mpt2sas per phy object
 586  *
 587  * Returns nothing.
 588  */
 589 static void
 590 _transport_del_phy_from_an_existing_port(struct MPT2SAS_ADAPTER *ioc,
 591         struct _sas_node *sas_node, struct _sas_phy *mpt2sas_phy)
 592 {
 593         struct _sas_port *mpt2sas_port, *next;
 594         struct _sas_phy *phy_srch;
 595
 596         if (mpt2sas_phy->phy_belongs_to_port == 0)
 597                 return;
 598
 599         list_for_each_entry_safe(mpt2sas_port, next, &sas_node->sas_port_list,
 600             port_list) {
 601                 list_for_each_entry(phy_srch, &mpt2sas_port->phy_list,
 602                     port_siblings) {
 603                         if (phy_srch != mpt2sas_phy)
 604                                 continue;
 605                         if (mpt2sas_port->num_phys == 1)
 606                                 _transport_delete_port(ioc, mpt2sas_port);
 607                         else
 608                                 _transport_delete_phy(ioc, mpt2sas_port,
 609                                     mpt2sas_phy);
 610                         return;
 611                 }
 612         }
 613 }
 614
 615 /**
 616  * _transport_sanity_check - sanity check when adding a new port
 617  * @ioc: per adapter object
 618  * @sas_node: sas node object (either expander or sas host)
 619  * @sas_address: sas address of device being added
 620  *
 621  * See the explanation above from _transport_delete_duplicate_port
 622  */
 623 static void
 624 _transport_sanity_check(struct MPT2SAS_ADAPTER *ioc, struct _sas_node *sas_node,
 625      u64 sas_address)
 626 {
 627         int i;
 628
 629         for (i = 0; i < sas_node->num_phys; i++) {
 630                 if (sas_node->phy[i].remote_identify.sas_address != sas_address)
 631                         continue;
 632                 if (sas_node->phy[i].phy_belongs_to_port == 1)
 633                         _transport_del_phy_from_an_existing_port(ioc, sas_node,
 634                             &sas_node->phy[i]);
 635         }
 636 }
 637
 638 /**
 639  * mpt2sas_transport_port_add - insert port to the list
 640  * @ioc: per adapter object
 641  * @handle: handle of attached device
 642  * @sas_address: sas address of parent expander or sas host
 643  * Context: This function will acquire ioc->sas_node_lock.
 644  *
 645  * Adding new port object to the sas_node->sas_port_list.
 646  *
 647  * Returns mpt2sas_port.
 648  */
 649 struct _sas_port *
 650 mpt2sas_transport_port_add(struct MPT2SAS_ADAPTER *ioc, u16 handle,
 651     u64 sas_address)
 652 {
 653         struct _sas_phy *mpt2sas_phy, *next;
 654         struct _sas_port *mpt2sas_port;
 655         unsigned long flags;
 656         struct _sas_node *sas_node;
 657         struct sas_rphy *rphy;
 658         int i;
 659         struct sas_port *port;
 660
 661         mpt2sas_port = kzalloc(sizeof(struct _sas_port),
 662             GFP_KERNEL);
 663         if (!mpt2sas_port) {
 664                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 665                     ioc->name, __FILE__, __LINE__, __func__);
 666                 return NULL;
 667         }
 668
 669         INIT_LIST_HEAD(&mpt2sas_port->port_list);
 670         INIT_LIST_HEAD(&mpt2sas_port->phy_list);
 671         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 672         sas_node = _transport_sas_node_find_by_sas_address(ioc, sas_address);
 673         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 674
 675         if (!sas_node) {
 676                 printk(MPT2SAS_ERR_FMT "%s: Could not find "
 677                     "parent sas_address(0x%016llx)!\n", ioc->name,
 678                     __func__, (unsigned long long)sas_address);
 679                 goto out_fail;
 680         }
 681
 682         if ((_transport_set_identify(ioc, handle,
 683             &mpt2sas_port->remote_identify))) {
 684                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 685                     ioc->name, __FILE__, __LINE__, __func__);
 686                 goto out_fail;
 687         }
 688
 689         if (mpt2sas_port->remote_identify.device_type == SAS_PHY_UNUSED) {
 690                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 691                     ioc->name, __FILE__, __LINE__, __func__);
 692                 goto out_fail;
 693         }
 694
 695         _transport_sanity_check(ioc, sas_node,
 696             mpt2sas_port->remote_identify.sas_address);
 697
 698         for (i = 0; i < sas_node->num_phys; i++) {
 699                 if (sas_node->phy[i].remote_identify.sas_address !=
 700                     mpt2sas_port->remote_identify.sas_address)
 701                         continue;
 702                 list_add_tail(&sas_node->phy[i].port_siblings,
 703                     &mpt2sas_port->phy_list);
 704                 mpt2sas_port->num_phys++;
 705         }
 706
 707         if (!mpt2sas_port->num_phys) {
 708                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 709                     ioc->name, __FILE__, __LINE__, __func__);
 710                 goto out_fail;
 711         }
 712
 713         port = sas_port_alloc_num(sas_node->parent_dev);
 714         if ((sas_port_add(port))) {
 715                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 716                     ioc->name, __FILE__, __LINE__, __func__);
 717                 goto out_fail;
 718         }
 719
 720         list_for_each_entry(mpt2sas_phy, &mpt2sas_port->phy_list,
 721             port_siblings) {
 722                 if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 723                         dev_printk(KERN_INFO, &port->dev, "add: handle(0x%04x)"
 724                             ", sas_addr(0x%016llx), phy(%d)\n", handle,
 725                             (unsigned long long)
 726                             mpt2sas_port->remote_identify.sas_address,
 727                             mpt2sas_phy->phy_id);
 728                 sas_port_add_phy(port, mpt2sas_phy->phy);
 729                 mpt2sas_phy->phy_belongs_to_port = 1;
 730         }
 731
 732         mpt2sas_port->port = port;
 733         if (mpt2sas_port->remote_identify.device_type == SAS_END_DEVICE)
 734                 rphy = sas_end_device_alloc(port);
 735         else
 736                 rphy = sas_expander_alloc(port,
 737                     mpt2sas_port->remote_identify.device_type);
 738
 739         rphy->identify = mpt2sas_port->remote_identify;
 740         if ((sas_rphy_add(rphy))) {
 741                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 742                     ioc->name, __FILE__, __LINE__, __func__);
 743         }
 744         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 745                 dev_printk(KERN_INFO, &rphy->dev, "add: handle(0x%04x), "
 746                     "sas_addr(0x%016llx)\n", handle,
 747                     (unsigned long long)
 748                     mpt2sas_port->remote_identify.sas_address);
 749         mpt2sas_port->rphy = rphy;
 750         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 751         list_add_tail(&mpt2sas_port->port_list, &sas_node->sas_port_list);
 752         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 753
 754         /* fill in report manufacture */
 755         if (mpt2sas_port->remote_identify.device_type ==
 756             MPI2_SAS_DEVICE_INFO_EDGE_EXPANDER ||
 757             mpt2sas_port->remote_identify.device_type ==
 758             MPI2_SAS_DEVICE_INFO_FANOUT_EXPANDER)
 759                 _transport_expander_report_manufacture(ioc,
 760                     mpt2sas_port->remote_identify.sas_address,
 761                     rphy_to_expander_device(rphy));
 762
 763         return mpt2sas_port;
 764
 765  out_fail:
 766         list_for_each_entry_safe(mpt2sas_phy, next, &mpt2sas_port->phy_list,
 767             port_siblings)
 768                 list_del(&mpt2sas_phy->port_siblings);
 769         kfree(mpt2sas_port);
 770         return NULL;
 771 }
 772
 773 /**
 774  * mpt2sas_transport_port_remove - remove port from the list
 775  * @ioc: per adapter object
 776  * @sas_address: sas address of attached device
 777  * @sas_address_parent: sas address of parent expander or sas host
 778  * Context: This function will acquire ioc->sas_node_lock.
 779  *
 780  * Removing object and freeing associated memory from the
 781  * ioc->sas_port_list.
 782  *
 783  * Return nothing.
 784  */
 785 void
 786 mpt2sas_transport_port_remove(struct MPT2SAS_ADAPTER *ioc, u64 sas_address,
 787     u64 sas_address_parent)
 788 {
 789         int i;
 790         unsigned long flags;
 791         struct _sas_port *mpt2sas_port, *next;
 792         struct _sas_node *sas_node;
 793         u8 found = 0;
 794         struct _sas_phy *mpt2sas_phy, *next_phy;
 795
 796         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 797         sas_node = _transport_sas_node_find_by_sas_address(ioc,
 798             sas_address_parent);
 799         if (!sas_node) {
 800                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 801                 return;
 802         }
 803         list_for_each_entry_safe(mpt2sas_port, next, &sas_node->sas_port_list,
 804             port_list) {
 805                 if (mpt2sas_port->remote_identify.sas_address != sas_address)
 806                         continue;
 807                 found = 1;
 808                 list_del(&mpt2sas_port->port_list);
 809                 goto out;
 810         }
 811  out:
 812         if (!found) {
 813                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 814                 return;
 815         }
 816
 817         for (i = 0; i < sas_node->num_phys; i++) {
 818                 if (sas_node->phy[i].remote_identify.sas_address == sas_address)
 819                         memset(&sas_node->phy[i].remote_identify, 0 ,
 820                             sizeof(struct sas_identify));
 821         }
 822
 823         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 824         list_for_each_entry_safe(mpt2sas_phy, next_phy,
 825             &mpt2sas_port->phy_list, port_siblings) {
 826                 if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 827                         dev_printk(KERN_INFO, &mpt2sas_port->port->dev,
 828                             "remove: sas_addr(0x%016llx), phy(%d)\n",
 829                             (unsigned long long)
 830                             mpt2sas_port->remote_identify.sas_address,
 831                             mpt2sas_phy->phy_id);
 832                 mpt2sas_phy->phy_belongs_to_port = 0;
 833                 sas_port_delete_phy(mpt2sas_port->port, mpt2sas_phy->phy);
 834                 list_del(&mpt2sas_phy->port_siblings);
 835         }
 836         sas_port_delete(mpt2sas_port->port);
 837         kfree(mpt2sas_port);
 838 }
 839
 840 /**
 841  * mpt2sas_transport_add_host_phy - report sas_host phy to transport
 842  * @ioc: per adapter object
 843  * @mpt2sas_phy: mpt2sas per phy object
 844  * @phy_pg0: sas phy page 0
 845  * @parent_dev: parent device class object
 846  *
 847  * Returns 0 for success, non-zero for failure.
 848  */
 849 int
 850 mpt2sas_transport_add_host_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_phy
 851     *mpt2sas_phy, Mpi2SasPhyPage0_t phy_pg0, struct device *parent_dev)
 852 {
 853         struct sas_phy *phy;
 854         int phy_index = mpt2sas_phy->phy_id;
 855
 856
 857         INIT_LIST_HEAD(&mpt2sas_phy->port_siblings);
 858         phy = sas_phy_alloc(parent_dev, phy_index);
 859         if (!phy) {
 860                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 861                     ioc->name, __FILE__, __LINE__, __func__);
 862                 return -1;
 863         }
 864         if ((_transport_set_identify(ioc, mpt2sas_phy->handle,
 865             &mpt2sas_phy->identify))) {
 866                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 867                     ioc->name, __FILE__, __LINE__, __func__);
 868                 return -1;
 869         }
 870         phy->identify = mpt2sas_phy->identify;
 871         mpt2sas_phy->attached_handle = le16_to_cpu(phy_pg0.AttachedDevHandle);
 872         if (mpt2sas_phy->attached_handle)
 873                 _transport_set_identify(ioc, mpt2sas_phy->attached_handle,
 874                     &mpt2sas_phy->remote_identify);
 875         phy->identify.phy_identifier = mpt2sas_phy->phy_id;
 876         phy->negotiated_linkrate = _transport_convert_phy_link_rate(
 877             phy_pg0.NegotiatedLinkRate & MPI2_SAS_NEG_LINK_RATE_MASK_PHYSICAL);
 878         phy->minimum_linkrate_hw = _transport_convert_phy_link_rate(
 879             phy_pg0.HwLinkRate & MPI2_SAS_HWRATE_MIN_RATE_MASK);
 880         phy->maximum_linkrate_hw = _transport_convert_phy_link_rate(
 881             phy_pg0.HwLinkRate >> 4);
 882         phy->minimum_linkrate = _transport_convert_phy_link_rate(
 883             phy_pg0.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
 884         phy->maximum_linkrate = _transport_convert_phy_link_rate(
 885             phy_pg0.ProgrammedLinkRate >> 4);
 886
 887         if ((sas_phy_add(phy))) {
 888                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 889                     ioc->name, __FILE__, __LINE__, __func__);
 890                 sas_phy_free(phy);
 891                 return -1;
 892         }
 893         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 894                 dev_printk(KERN_INFO, &phy->dev,
 895                     "add: handle(0x%04x), sas_addr(0x%016llx)\n"
 896                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
 897                     mpt2sas_phy->handle, (unsigned long long)
 898                     mpt2sas_phy->identify.sas_address,
 899                     mpt2sas_phy->attached_handle,
 900                     (unsigned long long)
 901                     mpt2sas_phy->remote_identify.sas_address);
 902         mpt2sas_phy->phy = phy;
 903         return 0;
 904 }
 905
 906
 907 /**
 908  * mpt2sas_transport_add_expander_phy - report expander phy to transport
 909  * @ioc: per adapter object
 910  * @mpt2sas_phy: mpt2sas per phy object
 911  * @expander_pg1: expander page 1
 912  * @parent_dev: parent device class object
 913  *
 914  * Returns 0 for success, non-zero for failure.
 915  */
 916 int
 917 mpt2sas_transport_add_expander_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_phy
 918     *mpt2sas_phy, Mpi2ExpanderPage1_t expander_pg1, struct device *parent_dev)
 919 {
 920         struct sas_phy *phy;
 921         int phy_index = mpt2sas_phy->phy_id;
 922
 923         INIT_LIST_HEAD(&mpt2sas_phy->port_siblings);
 924         phy = sas_phy_alloc(parent_dev, phy_index);
 925         if (!phy) {
 926                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 927                     ioc->name, __FILE__, __LINE__, __func__);
 928                 return -1;
 929         }
 930         if ((_transport_set_identify(ioc, mpt2sas_phy->handle,
 931             &mpt2sas_phy->identify))) {
 932                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 933                     ioc->name, __FILE__, __LINE__, __func__);
 934                 return -1;
 935         }
 936         phy->identify = mpt2sas_phy->identify;
 937         mpt2sas_phy->attached_handle =
 938             le16_to_cpu(expander_pg1.AttachedDevHandle);
 939         if (mpt2sas_phy->attached_handle)
 940                 _transport_set_identify(ioc, mpt2sas_phy->attached_handle,
 941                     &mpt2sas_phy->remote_identify);
 942         phy->identify.phy_identifier = mpt2sas_phy->phy_id;
 943         phy->negotiated_linkrate = _transport_convert_phy_link_rate(
 944             expander_pg1.NegotiatedLinkRate &
 945             MPI2_SAS_NEG_LINK_RATE_MASK_PHYSICAL);
 946         phy->minimum_linkrate_hw = _transport_convert_phy_link_rate(
 947             expander_pg1.HwLinkRate & MPI2_SAS_HWRATE_MIN_RATE_MASK);
 948         phy->maximum_linkrate_hw = _transport_convert_phy_link_rate(
 949             expander_pg1.HwLinkRate >> 4);
 950         phy->minimum_linkrate = _transport_convert_phy_link_rate(
 951             expander_pg1.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
 952         phy->maximum_linkrate = _transport_convert_phy_link_rate(
 953             expander_pg1.ProgrammedLinkRate >> 4);
 954
 955         if ((sas_phy_add(phy))) {
 956                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 957                     ioc->name, __FILE__, __LINE__, __func__);
 958                 sas_phy_free(phy);
 959                 return -1;
 960         }
 961         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 962                 dev_printk(KERN_INFO, &phy->dev,
 963                     "add: handle(0x%04x), sas_addr(0x%016llx)\n"
 964                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
 965                     mpt2sas_phy->handle, (unsigned long long)
 966                     mpt2sas_phy->identify.sas_address,
 967                     mpt2sas_phy->attached_handle,
 968                     (unsigned long long)
 969                     mpt2sas_phy->remote_identify.sas_address);
 970         mpt2sas_phy->phy = phy;
 971         return 0;
 972 }
 973
 974 /**
 975  * mpt2sas_transport_update_links - refreshing phy link changes
 976  * @ioc: per adapter object
 977  * @sas_address: sas address of parent expander or sas host
 978  * @handle: attached device handle
 979  * @phy_numberv: phy number
 980  * @link_rate: new link rate
 981  *
 982  * Returns nothing.
 983  */
 984 void
 985 mpt2sas_transport_update_links(struct MPT2SAS_ADAPTER *ioc,
 986      u64 sas_address, u16 handle, u8 phy_number, u8 link_rate)
 987 {
 988         unsigned long flags;
 989         struct _sas_node *sas_node;
 990         struct _sas_phy *mpt2sas_phy;
 991
 992         if (ioc->shost_recovery || ioc->pci_error_recovery)
 993                 return;
 994
 995         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 996         sas_node = _transport_sas_node_find_by_sas_address(ioc, sas_address);
 997         if (!sas_node) {
 998                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 999                 return;
1000         }
1001
1002         mpt2sas_phy = &sas_node->phy[phy_number];
1003         mpt2sas_phy->attached_handle = handle;
1004         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1005         if (handle && (link_rate >= MPI2_SAS_NEG_LINK_RATE_1_5)) {
1006                 _transport_set_identify(ioc, handle,
1007                     &mpt2sas_phy->remote_identify);
1008                 _transport_add_phy_to_an_existing_port(ioc, sas_node,
1009                     mpt2sas_phy, mpt2sas_phy->remote_identify.sas_address);
1010         } else
1011                 memset(&mpt2sas_phy->remote_identify, 0 , sizeof(struct
1012                     sas_identify));
1013
1014         if (mpt2sas_phy->phy)
1015                 mpt2sas_phy->phy->negotiated_linkrate =
1016                     _transport_convert_phy_link_rate(link_rate);
1017
1018         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
1019                 dev_printk(KERN_INFO, &mpt2sas_phy->phy->dev,
1020                     "refresh: parent sas_addr(0x%016llx),\n"
1021                     "\tlink_rate(0x%02x), phy(%d)\n"
1022                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
1023                     (unsigned long long)sas_address,
1024                     link_rate, phy_number, handle, (unsigned long long)
1025                     mpt2sas_phy->remote_identify.sas_address);
1026 }
1027
1028 static inline void *
1029 phy_to_ioc(struct sas_phy *phy)
1030 {
1031         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1032         return shost_priv(shost);
1033 }
1034
1035 static inline void *
1036 rphy_to_ioc(struct sas_rphy *rphy)
1037 {
1038         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1039         return shost_priv(shost);
1040 }
1041
1042
1043 /* report phy error log structure */
1044 struct phy_error_log_request{
1045         u8 smp_frame_type; /* 0x40 */
1046         u8 function; /* 0x11 */
1047         u8 allocated_response_length;
1048         u8 request_length; /* 02 */
1049         u8 reserved_1[5];
1050         u8 phy_identifier;
1051         u8 reserved_2[2];
1052 };
1053
1054 /* report phy error log reply structure */
1055 struct phy_error_log_reply{
1056         u8 smp_frame_type; /* 0x41 */
1057         u8 function; /* 0x11 */
1058         u8 function_result;
1059         u8 response_length;
1060         __be16 expander_change_count;
1061         u8 reserved_1[3];
1062         u8 phy_identifier;
1063         u8 reserved_2[2];
1064         __be32 invalid_dword;
1065         __be32 running_disparity_error;
1066         __be32 loss_of_dword_sync;
1067         __be32 phy_reset_problem;
1068 };
1069
1070 /**
1071  * _transport_get_expander_phy_error_log - return expander counters
1072  * @ioc: per adapter object
1073  * @phy: The sas phy object
1074  *
1075  * Returns 0 for success, non-zero for failure.
1076  *
1077  */
1078 static int
1079 _transport_get_expander_phy_error_log(struct MPT2SAS_ADAPTER *ioc,
1080     struct sas_phy *phy)
1081 {
1082         Mpi2SmpPassthroughRequest_t *mpi_request;
1083         Mpi2SmpPassthroughReply_t *mpi_reply;
1084         struct phy_error_log_request *phy_error_log_request;
1085         struct phy_error_log_reply *phy_error_log_reply;
1086         int rc;
1087         u16 smid;
1088         u32 ioc_state;
1089         unsigned long timeleft;
1090         void *psge;
1091         u32 sgl_flags;
1092         u8 issue_reset = 0;
1093         void *data_out = NULL;
1094         dma_addr_t data_out_dma;
1095         u32 sz;
1096         u16 wait_state_count;
1097
1098         if (ioc->shost_recovery || ioc->pci_error_recovery) {
1099                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
1100                     __func__, ioc->name);
1101                 return -EFAULT;
1102         }
1103
1104         mutex_lock(&ioc->transport_cmds.mutex);
1105
1106         if (ioc->transport_cmds.status != MPT2_CMD_NOT_USED) {
1107                 printk(MPT2SAS_ERR_FMT "%s: transport_cmds in use\n",
1108                     ioc->name, __func__);
1109                 rc = -EAGAIN;
1110                 goto out;
1111         }
1112         ioc->transport_cmds.status = MPT2_CMD_PENDING;
1113
1114         wait_state_count = 0;
1115         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1116         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1117                 if (wait_state_count++ == 10) {
1118                         printk(MPT2SAS_ERR_FMT
1119                             "%s: failed due to ioc not operational\n",
1120                             ioc->name, __func__);
1121                         rc = -EFAULT;
1122                         goto out;
1123                 }
1124                 ssleep(1);
1125                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1126                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
1127                     "operational state(count=%d)\n", ioc->name,
1128                     __func__, wait_state_count);
1129         }
1130         if (wait_state_count)
1131                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
1132                     ioc->name, __func__);
1133
1134         smid = mpt2sas_base_get_smid(ioc, ioc->transport_cb_idx);
1135         if (!smid) {
1136                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
1137                     ioc->name, __func__);
1138                 rc = -EAGAIN;
1139                 goto out;
1140         }
1141
1142         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
1143         ioc->transport_cmds.smid = smid;
1144
1145         sz = sizeof(struct phy_error_log_request) +
1146             sizeof(struct phy_error_log_reply);
1147         data_out = pci_alloc_consistent(ioc->pdev, sz, &data_out_dma);
1148         if (!data_out) {
1149                 printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
1150                     __LINE__, __func__);
1151                 rc = -ENOMEM;
1152                 mpt2sas_base_free_smid(ioc, smid);
1153                 goto out;
1154         }
1155
1156         rc = -EINVAL;
1157         memset(data_out, 0, sz);
1158         phy_error_log_request = data_out;
1159         phy_error_log_request->smp_frame_type = 0x40;
1160         phy_error_log_request->function = 0x11;
1161         phy_error_log_request->request_length = 2;
1162         phy_error_log_request->allocated_response_length = 0;
1163         phy_error_log_request->phy_identifier = phy->number;
1164
1165         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
1166         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
1167         mpi_request->PhysicalPort = 0xFF;
1168         mpi_request->VF_ID = 0; /* TODO */
1169         mpi_request->VP_ID = 0;
1170         mpi_request->SASAddress = cpu_to_le64(phy->identify.sas_address);
1171         mpi_request->RequestDataLength =
1172             cpu_to_le16(sizeof(struct phy_error_log_request));
1173         psge = &mpi_request->SGL;
1174
1175         /* WRITE sgel first */
1176         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
1177             MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
1178         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
1179         ioc->base_add_sg_single(psge, sgl_flags |
1180             sizeof(struct phy_error_log_request), data_out_dma);
1181
1182         /* incr sgel */
1183         psge += ioc->sge_size;
1184
1185         /* READ sgel last */
1186         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
1187             MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
1188             MPI2_SGE_FLAGS_END_OF_LIST);
1189         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
1190         ioc->base_add_sg_single(psge, sgl_flags |
1191             sizeof(struct phy_error_log_reply), data_out_dma +
1192             sizeof(struct phy_error_log_request));
1193
1194         dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "phy_error_log - "
1195             "send to sas_addr(0x%016llx), phy(%d)\n", ioc->name,
1196             (unsigned long long)phy->identify.sas_address, phy->number));
1197         init_completion(&ioc->transport_cmds.done);
1198         mpt2sas_base_put_smid_default(ioc, smid);
1199         timeleft = wait_for_completion_timeout(&ioc->transport_cmds.done,
1200             10*HZ);
1201
1202         if (!(ioc->transport_cmds.status & MPT2_CMD_COMPLETE)) {
1203                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
1204                     ioc->name, __func__);
1205                 _debug_dump_mf(mpi_request,
1206                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
1207                 if (!(ioc->transport_cmds.status & MPT2_CMD_RESET))
1208                         issue_reset = 1;
1209                 goto issue_host_reset;
1210         }
1211
1212         dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "phy_error_log - "
1213             "complete\n", ioc->name));
1214
1215         if (ioc->transport_cmds.status & MPT2_CMD_REPLY_VALID) {
1216
1217                 mpi_reply = ioc->transport_cmds.reply;
1218
1219                 dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
1220                     "phy_error_log - reply data transfer size(%d)\n",
1221                     ioc->name, le16_to_cpu(mpi_reply->ResponseDataLength)));
1222
1223                 if (le16_to_cpu(mpi_reply->ResponseDataLength) !=
1224                     sizeof(struct phy_error_log_reply))
1225                         goto out;
1226
1227                 phy_error_log_reply = data_out +
1228                     sizeof(struct phy_error_log_request);
1229
1230                 dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
1231                     "phy_error_log - function_result(%d)\n",
1232                     ioc->name, phy_error_log_reply->function_result));
1233
1234                 phy->invalid_dword_count =
1235                     be32_to_cpu(phy_error_log_reply->invalid_dword);
1236                 phy->running_disparity_error_count =
1237                     be32_to_cpu(phy_error_log_reply->running_disparity_error);
1238                 phy->loss_of_dword_sync_count =
1239                     be32_to_cpu(phy_error_log_reply->loss_of_dword_sync);
1240                 phy->phy_reset_problem_count =
1241                     be32_to_cpu(phy_error_log_reply->phy_reset_problem);
1242                 rc = 0;
1243         } else
1244                 dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
1245                     "phy_error_log - no reply\n", ioc->name));
1246
1247  issue_host_reset:
1248         if (issue_reset)
1249                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1250                     FORCE_BIG_HAMMER);
1251  out:
1252         ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
1253         if (data_out)
1254                 pci_free_consistent(ioc->pdev, sz, data_out, data_out_dma);
1255
1256         mutex_unlock(&ioc->transport_cmds.mutex);
1257         return rc;
1258 }
1259
1260 /**
1261  * _transport_get_linkerrors - return phy counters for both hba and expanders
1262  * @phy: The sas phy object
1263  *
1264  * Returns 0 for success, non-zero for failure.
1265  *
1266  */
1267 static int
1268 _transport_get_linkerrors(struct sas_phy *phy)
1269 {
1270         struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
1271         unsigned long flags;
1272         Mpi2ConfigReply_t mpi_reply;
1273         Mpi2SasPhyPage1_t phy_pg1;
1274
1275         spin_lock_irqsave(&ioc->sas_node_lock, flags);
1276         if (_transport_sas_node_find_by_sas_address(ioc,
1277             phy->identify.sas_address) == NULL) {
1278                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1279                 return -EINVAL;
1280         }
1281         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1282
1283         if (phy->identify.sas_address != ioc->sas_hba.sas_address)
1284                 return _transport_get_expander_phy_error_log(ioc, phy);
1285
1286         /* get hba phy error logs */
1287         if ((mpt2sas_config_get_phy_pg1(ioc, &mpi_reply, &phy_pg1,
1288                     phy->number))) {
1289                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1290                     ioc->name, __FILE__, __LINE__, __func__);
1291                 return -ENXIO;
1292         }
1293
1294         if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo)
1295                 printk(MPT2SAS_INFO_FMT "phy(%d), ioc_status"
1296                     "(0x%04x), loginfo(0x%08x)\n", ioc->name,
1297                     phy->number, le16_to_cpu(mpi_reply.IOCStatus),
1298                     le32_to_cpu(mpi_reply.IOCLogInfo));
1299
1300         phy->invalid_dword_count = le32_to_cpu(phy_pg1.InvalidDwordCount);
1301         phy->running_disparity_error_count =
1302             le32_to_cpu(phy_pg1.RunningDisparityErrorCount);
1303         phy->loss_of_dword_sync_count =
1304             le32_to_cpu(phy_pg1.LossDwordSynchCount);
1305         phy->phy_reset_problem_count =
1306             le32_to_cpu(phy_pg1.PhyResetProblemCount);
1307         return 0;
1308 }
1309
1310 /**
1311  * _transport_get_enclosure_identifier -
1312  * @phy: The sas phy object
1313  *
1314  * Obtain the enclosure logical id for an expander.
1315  * Returns 0 for success, non-zero for failure.
1316  */
1317 static int
1318 _transport_get_enclosure_identifier(struct sas_rphy *rphy, u64 *identifier)
1319 {
1320         struct MPT2SAS_ADAPTER *ioc = rphy_to_ioc(rphy);
1321         struct _sas_device *sas_device;
1322         unsigned long flags;
1323         int rc;
1324
1325         spin_lock_irqsave(&ioc->sas_device_lock, flags);
1326         sas_device = mpt2sas_scsih_sas_device_find_by_sas_address(ioc,
1327             rphy->identify.sas_address);
1328         if (sas_device) {
1329                 *identifier = sas_device->enclosure_logical_id;
1330                 rc = 0;
1331         } else {
1332                 *identifier = 0;
1333                 rc = -ENXIO;
1334         }
1335         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1336         return rc;
1337 }
1338
1339 /**
1340  * _transport_get_bay_identifier -
1341  * @phy: The sas phy object
1342  *
1343  * Returns the slot id for a device that resides inside an enclosure.
1344  */
1345 static int
1346 _transport_get_bay_identifier(struct sas_rphy *rphy)
1347 {
1348         struct MPT2SAS_ADAPTER *ioc = rphy_to_ioc(rphy);
1349         struct _sas_device *sas_device;
1350         unsigned long flags;
1351         int rc;
1352
1353         spin_lock_irqsave(&ioc->sas_device_lock, flags);
1354         sas_device = mpt2sas_scsih_sas_device_find_by_sas_address(ioc,
1355             rphy->identify.sas_address);
1356         if (sas_device)
1357                 rc = sas_device->slot;
1358         else
1359                 rc = -ENXIO;
1360         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1361         return rc;
1362 }
1363
1364 /* phy control request structure */
1365 struct phy_control_request{
1366         u8 smp_frame_type; /* 0x40 */
1367         u8 function; /* 0x91 */
1368         u8 allocated_response_length;
1369         u8 request_length; /* 0x09 */
1370         u16 expander_change_count;
1371         u8 reserved_1[3];
1372         u8 phy_identifier;
1373         u8 phy_operation;
1374         u8 reserved_2[13];
1375         u64 attached_device_name;
1376         u8 programmed_min_physical_link_rate;
1377         u8 programmed_max_physical_link_rate;
1378         u8 reserved_3[6];
1379 };
1380
1381 /* phy control reply structure */
1382 struct phy_control_reply{
1383         u8 smp_frame_type; /* 0x41 */
1384         u8 function; /* 0x11 */
1385         u8 function_result;
1386         u8 response_length;
1387 };
1388
1389 #define SMP_PHY_CONTROL_LINK_RESET      (0x01)
1390 #define SMP_PHY_CONTROL_HARD_RESET      (0x02)
1391 #define SMP_PHY_CONTROL_DISABLE         (0x03)
1392
1393 /**
1394  * _transport_expander_phy_control - expander phy control
1395  * @ioc: per adapter object
1396  * @phy: The sas phy object
1397  *
1398  * Returns 0 for success, non-zero for failure.
1399  *
1400  */
1401 static int
1402 _transport_expander_phy_control(struct MPT2SAS_ADAPTER *ioc,
1403     struct sas_phy *phy, u8 phy_operation)
1404 {
1405         Mpi2SmpPassthroughRequest_t *mpi_request;
1406         Mpi2SmpPassthroughReply_t *mpi_reply;
1407         struct phy_control_request *phy_control_request;
1408         struct phy_control_reply *phy_control_reply;
1409         int rc;
1410         u16 smid;
1411         u32 ioc_state;
1412         unsigned long timeleft;
1413         void *psge;
1414         u32 sgl_flags;
1415         u8 issue_reset = 0;
1416         void *data_out = NULL;
1417         dma_addr_t data_out_dma;
1418         u32 sz;
1419         u16 wait_state_count;
1420
1421         if (ioc->shost_recovery) {
1422                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
1423                     __func__, ioc->name);
1424                 return -EFAULT;
1425         }
1426
1427         mutex_lock(&ioc->transport_cmds.mutex);
1428
1429         if (ioc->transport_cmds.status != MPT2_CMD_NOT_USED) {
1430                 printk(MPT2SAS_ERR_FMT "%s: transport_cmds in use\n",
1431                     ioc->name, __func__);
1432                 rc = -EAGAIN;
1433                 goto out;
1434         }
1435         ioc->transport_cmds.status = MPT2_CMD_PENDING;
1436
1437         wait_state_count = 0;
1438         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1439         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1440                 if (wait_state_count++ == 10) {
1441                         printk(MPT2SAS_ERR_FMT
1442                             "%s: failed due to ioc not operational\n",
1443                             ioc->name, __func__);
1444                         rc = -EFAULT;
1445                         goto out;
1446                 }
1447                 ssleep(1);
1448                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1449                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
1450                     "operational state(count=%d)\n", ioc->name,
1451                     __func__, wait_state_count);
1452         }
1453         if (wait_state_count)
1454                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
1455                     ioc->name, __func__);
1456
1457         smid = mpt2sas_base_get_smid(ioc, ioc->transport_cb_idx);
1458         if (!smid) {
1459                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
1460                     ioc->name, __func__);
1461                 rc = -EAGAIN;
1462                 goto out;
1463         }
1464
1465         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
1466         ioc->transport_cmds.smid = smid;
1467
1468         sz = sizeof(struct phy_control_request) +
1469             sizeof(struct phy_control_reply);
1470         data_out = pci_alloc_consistent(ioc->pdev, sz, &data_out_dma);
1471         if (!data_out) {
1472                 printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
1473                     __LINE__, __func__);
1474                 rc = -ENOMEM;
1475                 mpt2sas_base_free_smid(ioc, smid);
1476                 goto out;
1477         }
1478
1479         rc = -EINVAL;
1480         memset(data_out, 0, sz);
1481         phy_control_request = data_out;
1482         phy_control_request->smp_frame_type = 0x40;
1483         phy_control_request->function = 0x91;
1484         phy_control_request->request_length = 9;
1485         phy_control_request->allocated_response_length = 0;
1486         phy_control_request->phy_identifier = phy->number;
1487         phy_control_request->phy_operation = phy_operation;
1488         phy_control_request->programmed_min_physical_link_rate =
1489             phy->minimum_linkrate << 4;
1490         phy_control_request->programmed_max_physical_link_rate =
1491             phy->maximum_linkrate << 4;
1492
1493         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
1494         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
1495         mpi_request->PhysicalPort = 0xFF;
1496         mpi_request->VF_ID = 0; /* TODO */
1497         mpi_request->VP_ID = 0;
1498         mpi_request->SASAddress = cpu_to_le64(phy->identify.sas_address);
1499         mpi_request->RequestDataLength =
1500             cpu_to_le16(sizeof(struct phy_error_log_request));
1501         psge = &mpi_request->SGL;
1502
1503         /* WRITE sgel first */
1504         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
1505             MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
1506         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
1507         ioc->base_add_sg_single(psge, sgl_flags |
1508             sizeof(struct phy_control_request), data_out_dma);
1509
1510         /* incr sgel */
1511         psge += ioc->sge_size;
1512
1513         /* READ sgel last */
1514         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
1515             MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
1516             MPI2_SGE_FLAGS_END_OF_LIST);
1517         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
1518         ioc->base_add_sg_single(psge, sgl_flags |
1519             sizeof(struct phy_control_reply), data_out_dma +
1520             sizeof(struct phy_control_request));
1521
1522         dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "phy_control - "
1523             "send to sas_addr(0x%016llx), phy(%d), opcode(%d)\n", ioc->name,
1524             (unsigned long long)phy->identify.sas_address, phy->number,
1525             phy_operation));
1526
1527         init_completion(&ioc->transport_cmds.done);
1528         mpt2sas_base_put_smid_default(ioc, smid);
1529         timeleft = wait_for_completion_timeout(&ioc->transport_cmds.done,
1530             10*HZ);
1531
1532         if (!(ioc->transport_cmds.status & MPT2_CMD_COMPLETE)) {
1533                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
1534                     ioc->name, __func__);
1535                 _debug_dump_mf(mpi_request,
1536                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
1537                 if (!(ioc->transport_cmds.status & MPT2_CMD_RESET))
1538                         issue_reset = 1;
1539                 goto issue_host_reset;
1540         }
1541
1542         dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "phy_control - "
1543             "complete\n", ioc->name));
1544
1545         if (ioc->transport_cmds.status & MPT2_CMD_REPLY_VALID) {
1546
1547                 mpi_reply = ioc->transport_cmds.reply;
1548
1549                 dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
1550                     "phy_control - reply data transfer size(%d)\n",
1551                     ioc->name, le16_to_cpu(mpi_reply->ResponseDataLength)));
1552
1553                 if (le16_to_cpu(mpi_reply->ResponseDataLength) !=
1554                     sizeof(struct phy_control_reply))
1555                         goto out;
1556
1557                 phy_control_reply = data_out +
1558                     sizeof(struct phy_control_request);
1559
1560                 dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
1561                     "phy_control - function_result(%d)\n",
1562                     ioc->name, phy_control_reply->function_result));
1563
1564                 rc = 0;
1565         } else
1566                 dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
1567                     "phy_control - no reply\n", ioc->name));
1568
1569  issue_host_reset:
1570         if (issue_reset)
1571                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1572                     FORCE_BIG_HAMMER);
1573  out:
1574         ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
1575         if (data_out)
1576                 pci_free_consistent(ioc->pdev, sz, data_out, data_out_dma);
1577
1578         mutex_unlock(&ioc->transport_cmds.mutex);
1579         return rc;
1580 }
1581
1582 /**
1583  * _transport_phy_reset -
1584  * @phy: The sas phy object
1585  * @hard_reset:
1586  *
1587  * Returns 0 for success, non-zero for failure.
1588  */
1589 static int
1590 _transport_phy_reset(struct sas_phy *phy, int hard_reset)
1591 {
1592         struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
1593         Mpi2SasIoUnitControlReply_t mpi_reply;
1594         Mpi2SasIoUnitControlRequest_t mpi_request;
1595         unsigned long flags;
1596
1597         spin_lock_irqsave(&ioc->sas_node_lock, flags);
1598         if (_transport_sas_node_find_by_sas_address(ioc,
1599             phy->identify.sas_address) == NULL) {
1600                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1601                 return -EINVAL;
1602         }
1603         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1604
1605         /* handle expander phys */
1606         if (phy->identify.sas_address != ioc->sas_hba.sas_address)
1607                 return _transport_expander_phy_control(ioc, phy,
1608                     (hard_reset == 1) ? SMP_PHY_CONTROL_HARD_RESET :
1609                     SMP_PHY_CONTROL_LINK_RESET);
1610
1611         /* handle hba phys */
1612         memset(&mpi_request, 0, sizeof(Mpi2SasIoUnitControlReply_t));
1613         mpi_request.Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
1614         mpi_request.Operation = hard_reset ?
1615             MPI2_SAS_OP_PHY_HARD_RESET : MPI2_SAS_OP_PHY_LINK_RESET;
1616         mpi_request.PhyNum = phy->number;
1617
1618         if ((mpt2sas_base_sas_iounit_control(ioc, &mpi_reply, &mpi_request))) {
1619                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1620                     ioc->name, __FILE__, __LINE__, __func__);
1621                 return -ENXIO;
1622         }
1623
1624         if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo)
1625                 printk(MPT2SAS_INFO_FMT "phy(%d), ioc_status"
1626                     "(0x%04x), loginfo(0x%08x)\n", ioc->name,
1627                     phy->number, le16_to_cpu(mpi_reply.IOCStatus),
1628                     le32_to_cpu(mpi_reply.IOCLogInfo));
1629
1630         return 0;
1631 }
1632
1633 /**
1634  * _transport_phy_enable - enable/disable phys
1635  * @phy: The sas phy object
1636  * @enable: enable phy when true
1637  *
1638  * Only support sas_host direct attached phys.
1639  * Returns 0 for success, non-zero for failure.
1640  */
1641 static int
1642 _transport_phy_enable(struct sas_phy *phy, int enable)
1643 {
1644         struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
1645         Mpi2SasIOUnitPage1_t *sas_iounit_pg1 = NULL;
1646         Mpi2SasIOUnitPage0_t *sas_iounit_pg0 = NULL;
1647         Mpi2ConfigReply_t mpi_reply;
1648         u16 ioc_status;
1649         u16 sz;
1650         int rc = 0;
1651         unsigned long flags;
1652         int i, discovery_active;
1653
1654         spin_lock_irqsave(&ioc->sas_node_lock, flags);
1655         if (_transport_sas_node_find_by_sas_address(ioc,
1656             phy->identify.sas_address) == NULL) {
1657                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1658                 return -EINVAL;
1659         }
1660         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1661
1662         /* handle expander phys */
1663         if (phy->identify.sas_address != ioc->sas_hba.sas_address)
1664                 return _transport_expander_phy_control(ioc, phy,
1665                     (enable == 1) ? SMP_PHY_CONTROL_LINK_RESET :
1666                     SMP_PHY_CONTROL_DISABLE);
1667
1668         /* handle hba phys */
1669
1670         /* read sas_iounit page 0 */
1671         sz = offsetof(Mpi2SasIOUnitPage0_t, PhyData) + (ioc->sas_hba.num_phys *
1672             sizeof(Mpi2SasIOUnit0PhyData_t));
1673         sas_iounit_pg0 = kzalloc(sz, GFP_KERNEL);
1674         if (!sas_iounit_pg0) {
1675                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1676                     ioc->name, __FILE__, __LINE__, __func__);
1677                 rc = -ENOMEM;
1678                 goto out;
1679         }
1680         if ((mpt2sas_config_get_sas_iounit_pg0(ioc, &mpi_reply,
1681             sas_iounit_pg0, sz))) {
1682                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1683                     ioc->name, __FILE__, __LINE__, __func__);
1684                 rc = -ENXIO;
1685                 goto out;
1686         }
1687         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
1688             MPI2_IOCSTATUS_MASK;
1689         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
1690                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1691                     ioc->name, __FILE__, __LINE__, __func__);
1692                 rc = -EIO;
1693                 goto out;
1694         }
1695
1696         /* unable to enable/disable phys when when discovery is active */
1697         for (i = 0, discovery_active = 0; i < ioc->sas_hba.num_phys ; i++) {
1698                 if (sas_iounit_pg0->PhyData[i].PortFlags &
1699                     MPI2_SASIOUNIT0_PORTFLAGS_DISCOVERY_IN_PROGRESS) {
1700                         printk(MPT2SAS_ERR_FMT "discovery is active on "
1701                             "port = %d, phy = %d: unable to enable/disable "
1702                             "phys, try again later!\n", ioc->name,
1703                             sas_iounit_pg0->PhyData[i].Port, i);
1704                         discovery_active = 1;
1705                 }
1706         }
1707
1708         if (discovery_active) {
1709                 rc = -EAGAIN;
1710                 goto out;
1711         }
1712
1713         /* read sas_iounit page 1 */
1714         sz = offsetof(Mpi2SasIOUnitPage1_t, PhyData) + (ioc->sas_hba.num_phys *
1715             sizeof(Mpi2SasIOUnit1PhyData_t));
1716         sas_iounit_pg1 = kzalloc(sz, GFP_KERNEL);
1717         if (!sas_iounit_pg1) {
1718                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1719                     ioc->name, __FILE__, __LINE__, __func__);
1720                 rc = -ENOMEM;
1721                 goto out;
1722         }
1723         if ((mpt2sas_config_get_sas_iounit_pg1(ioc, &mpi_reply,
1724             sas_iounit_pg1, sz))) {
1725                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1726                     ioc->name, __FILE__, __LINE__, __func__);
1727                 rc = -ENXIO;
1728                 goto out;
1729         }
1730         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
1731             MPI2_IOCSTATUS_MASK;
1732         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
1733                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1734                     ioc->name, __FILE__, __LINE__, __func__);
1735                 rc = -EIO;
1736                 goto out;
1737         }
1738         /* copy Port/PortFlags/PhyFlags from page 0 */
1739         for (i = 0; i < ioc->sas_hba.num_phys ; i++) {
1740                 sas_iounit_pg1->PhyData[i].Port =
1741                     sas_iounit_pg0->PhyData[i].Port;
1742                 sas_iounit_pg1->PhyData[i].PortFlags =
1743                     (sas_iounit_pg0->PhyData[i].PortFlags &
1744                     MPI2_SASIOUNIT0_PORTFLAGS_AUTO_PORT_CONFIG);
1745                 sas_iounit_pg1->PhyData[i].PhyFlags =
1746                     (sas_iounit_pg0->PhyData[i].PhyFlags &
1747                     (MPI2_SASIOUNIT0_PHYFLAGS_ZONING_ENABLED +
1748                     MPI2_SASIOUNIT0_PHYFLAGS_PHY_DISABLED));
1749         }
1750         if (enable)
1751                 sas_iounit_pg1->PhyData[phy->number].PhyFlags
1752                     &= ~MPI2_SASIOUNIT1_PHYFLAGS_PHY_DISABLE;
1753         else
1754                 sas_iounit_pg1->PhyData[phy->number].PhyFlags
1755                     |= MPI2_SASIOUNIT1_PHYFLAGS_PHY_DISABLE;
1756
1757         mpt2sas_config_set_sas_iounit_pg1(ioc, &mpi_reply, sas_iounit_pg1, sz);
1758
1759         /* link reset */
1760         if (enable)
1761                 _transport_phy_reset(phy, 0);
1762
1763  out:
1764         kfree(sas_iounit_pg1);
1765         kfree(sas_iounit_pg0);
1766         return rc;
1767 }
1768
1769 /**
1770  * _transport_phy_speed - set phy min/max link rates
1771  * @phy: The sas phy object
1772  * @rates: rates defined in sas_phy_linkrates
1773  *
1774  * Only support sas_host direct attached phys.
1775  * Returns 0 for success, non-zero for failure.
1776  */
1777 static int
1778 _transport_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates)
1779 {
1780         struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
1781         Mpi2SasIOUnitPage1_t *sas_iounit_pg1 = NULL;
1782         Mpi2SasPhyPage0_t phy_pg0;
1783         Mpi2ConfigReply_t mpi_reply;
1784         u16 ioc_status;
1785         u16 sz;
1786         int i;
1787         int rc = 0;
1788         unsigned long flags;
1789
1790         spin_lock_irqsave(&ioc->sas_node_lock, flags);
1791         if (_transport_sas_node_find_by_sas_address(ioc,
1792             phy->identify.sas_address) == NULL) {
1793                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1794                 return -EINVAL;
1795         }
1796         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1797
1798         if (!rates->minimum_linkrate)
1799                 rates->minimum_linkrate = phy->minimum_linkrate;
1800         else if (rates->minimum_linkrate < phy->minimum_linkrate_hw)
1801                 rates->minimum_linkrate = phy->minimum_linkrate_hw;
1802
1803         if (!rates->maximum_linkrate)
1804                 rates->maximum_linkrate = phy->maximum_linkrate;
1805         else if (rates->maximum_linkrate > phy->maximum_linkrate_hw)
1806                 rates->maximum_linkrate = phy->maximum_linkrate_hw;
1807
1808         /* handle expander phys */
1809         if (phy->identify.sas_address != ioc->sas_hba.sas_address) {
1810                 phy->minimum_linkrate = rates->minimum_linkrate;
1811                 phy->maximum_linkrate = rates->maximum_linkrate;
1812                 return _transport_expander_phy_control(ioc, phy,
1813                     SMP_PHY_CONTROL_LINK_RESET);
1814         }
1815
1816         /* handle hba phys */
1817
1818         /* sas_iounit page 1 */
1819         sz = offsetof(Mpi2SasIOUnitPage1_t, PhyData) + (ioc->sas_hba.num_phys *
1820             sizeof(Mpi2SasIOUnit1PhyData_t));
1821         sas_iounit_pg1 = kzalloc(sz, GFP_KERNEL);
1822         if (!sas_iounit_pg1) {
1823                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1824                     ioc->name, __FILE__, __LINE__, __func__);
1825                 rc = -ENOMEM;
1826                 goto out;
1827         }
1828         if ((mpt2sas_config_get_sas_iounit_pg1(ioc, &mpi_reply,
1829             sas_iounit_pg1, sz))) {
1830                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1831                     ioc->name, __FILE__, __LINE__, __func__);
1832                 rc = -ENXIO;
1833                 goto out;
1834         }
1835         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
1836             MPI2_IOCSTATUS_MASK;
1837         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
1838                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1839                     ioc->name, __FILE__, __LINE__, __func__);
1840                 rc = -EIO;
1841                 goto out;
1842         }
1843
1844         for (i = 0; i < ioc->sas_hba.num_phys; i++) {
1845                 if (phy->number != i) {
1846                         sas_iounit_pg1->PhyData[i].MaxMinLinkRate =
1847                             (ioc->sas_hba.phy[i].phy->minimum_linkrate +
1848                             (ioc->sas_hba.phy[i].phy->maximum_linkrate << 4));
1849                 } else {
1850                         sas_iounit_pg1->PhyData[i].MaxMinLinkRate =
1851                             (rates->minimum_linkrate +
1852                             (rates->maximum_linkrate << 4));
1853                 }
1854         }
1855
1856         if (mpt2sas_config_set_sas_iounit_pg1(ioc, &mpi_reply, sas_iounit_pg1,
1857             sz)) {
1858                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
1859                     ioc->name, __FILE__, __LINE__, __func__);
1860                 rc = -ENXIO;
1861                 goto out;
1862         }
1863
1864         /* link reset */
1865         _transport_phy_reset(phy, 0);
1866
1867         /* read phy page 0, then update the rates in the sas transport phy */
1868         if (!mpt2sas_config_get_phy_pg0(ioc, &mpi_reply, &phy_pg0,
1869             phy->number)) {
1870                 phy->minimum_linkrate = _transport_convert_phy_link_rate(
1871                     phy_pg0.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
1872                 phy->maximum_linkrate = _transport_convert_phy_link_rate(
1873                     phy_pg0.ProgrammedLinkRate >> 4);
1874                 phy->negotiated_linkrate = _transport_convert_phy_link_rate(
1875                     phy_pg0.NegotiatedLinkRate &
1876                     MPI2_SAS_NEG_LINK_RATE_MASK_PHYSICAL);
1877         }
1878
1879  out:
1880         kfree(sas_iounit_pg1);
1881         return rc;
1882 }
1883
1884
1885 /**
1886  * _transport_smp_handler - transport portal for smp passthru
1887  * @shost: shost object
1888  * @rphy: sas transport rphy object
1889  * @req:
1890  *
1891  * This used primarily for smp_utils.
1892  * Example:
1893  *           smp_rep_general /sys/class/bsg/expander-5:0
1894  */
1895 static int
1896 _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
1897     struct request *req)
1898 {
1899         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
1900         Mpi2SmpPassthroughRequest_t *mpi_request;
1901         Mpi2SmpPassthroughReply_t *mpi_reply;
1902         int rc;
1903         u16 smid;
1904         u32 ioc_state;
1905         unsigned long timeleft;
1906         void *psge;
1907         u32 sgl_flags;
1908         u8 issue_reset = 0;
1909         dma_addr_t dma_addr_in = 0;
1910         dma_addr_t dma_addr_out = 0;
1911         dma_addr_t pci_dma_in = 0;
1912         dma_addr_t pci_dma_out = 0;
1913         void *pci_addr_in = NULL;
1914         void *pci_addr_out = NULL;
1915         u16 wait_state_count;
1916         struct request *rsp = req->next_rq;
1917         struct bio_vec bvec;
1918         struct bvec_iter iter;
1919
1920         if (!rsp) {
1921                 printk(MPT2SAS_ERR_FMT "%s: the smp response space is "
1922                     "missing\n", ioc->name, __func__);
1923                 return -EINVAL;
1924         }
1925         if (ioc->shost_recovery || ioc->pci_error_recovery) {
1926                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
1927                     __func__, ioc->name);
1928                 return -EFAULT;
1929         }
1930
1931         rc = mutex_lock_interruptible(&ioc->transport_cmds.mutex);
1932         if (rc)
1933                 return rc;
1934
1935         if (ioc->transport_cmds.status != MPT2_CMD_NOT_USED) {
1936                 printk(MPT2SAS_ERR_FMT "%s: transport_cmds in use\n", ioc->name,
1937                     __func__);
1938                 rc = -EAGAIN;
1939                 goto out;
1940         }
1941         ioc->transport_cmds.status = MPT2_CMD_PENDING;
1942
1943         /* Check if the request is split across multiple segments */
1944         if (bio_multiple_segments(req->bio)) {
1945                 u32 offset = 0;
1946
1947                 /* Allocate memory and copy the request */
1948                 pci_addr_out = pci_alloc_consistent(ioc->pdev,
1949                     blk_rq_bytes(req), &pci_dma_out);
1950                 if (!pci_addr_out) {
1951                         printk(MPT2SAS_INFO_FMT "%s(): PCI Addr out = NULL\n",
1952                             ioc->name, __func__);
1953                         rc = -ENOMEM;
1954                         goto out;
1955                 }
1956
1957                 bio_for_each_segment(bvec, req->bio, iter) {
1958                         memcpy(pci_addr_out + offset,
1959                             page_address(bvec.bv_page) + bvec.bv_offset,
1960                             bvec.bv_len);
1961                         offset += bvec.bv_len;
1962                 }
1963         } else {
1964                 dma_addr_out = pci_map_single(ioc->pdev, bio_data(req->bio),
1965                     blk_rq_bytes(req), PCI_DMA_BIDIRECTIONAL);
1966                 if (!dma_addr_out) {
1967                         printk(MPT2SAS_INFO_FMT "%s(): DMA Addr out = NULL\n",
1968                             ioc->name, __func__);
1969                         rc = -ENOMEM;
1970                         goto free_pci;
1971                 }
1972         }
1973
1974         /* Check if the response needs to be populated across
1975          * multiple segments */
1976         if (bio_multiple_segments(rsp->bio)) {
1977                 pci_addr_in = pci_alloc_consistent(ioc->pdev, blk_rq_bytes(rsp),
1978                     &pci_dma_in);
1979                 if (!pci_addr_in) {
1980                         printk(MPT2SAS_INFO_FMT "%s(): PCI Addr in = NULL\n",
1981                             ioc->name, __func__);
1982                         rc = -ENOMEM;
1983                         goto unmap;
1984                 }
1985         } else {
1986                 dma_addr_in =  pci_map_single(ioc->pdev, bio_data(rsp->bio),
1987                     blk_rq_bytes(rsp), PCI_DMA_BIDIRECTIONAL);
1988                 if (!dma_addr_in) {
1989                         printk(MPT2SAS_INFO_FMT "%s(): DMA Addr in = NULL\n",
1990                             ioc->name, __func__);
1991                         rc = -ENOMEM;
1992                         goto unmap;
1993                 }
1994         }
1995
1996         wait_state_count = 0;
1997         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1998         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1999                 if (wait_state_count++ == 10) {
2000                         printk(MPT2SAS_ERR_FMT
2001                             "%s: failed due to ioc not operational\n",
2002                             ioc->name, __func__);
2003                         rc = -EFAULT;
2004                         goto unmap;
2005                 }
2006                 ssleep(1);
2007                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
2008                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
2009                     "operational state(count=%d)\n", ioc->name,
2010                     __func__, wait_state_count);
2011         }
2012         if (wait_state_count)
2013                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
2014                     ioc->name, __func__);
2015
2016         smid = mpt2sas_base_get_smid(ioc, ioc->transport_cb_idx);
2017         if (!smid) {
2018                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
2019                     ioc->name, __func__);
2020                 rc = -EAGAIN;
2021                 goto unmap;
2022         }
2023
2024         rc = 0;
2025         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
2026         ioc->transport_cmds.smid = smid;
2027
2028         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
2029         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
2030         mpi_request->PhysicalPort = 0xFF;
2031         mpi_request->VF_ID = 0; /* TODO */
2032         mpi_request->VP_ID = 0;
2033         mpi_request->SASAddress = (rphy) ?
2034             cpu_to_le64(rphy->identify.sas_address) :
2035             cpu_to_le64(ioc->sas_hba.sas_address);
2036         mpi_request->RequestDataLength = cpu_to_le16(blk_rq_bytes(req) - 4);
2037         psge = &mpi_request->SGL;
2038
2039         /* WRITE sgel first */
2040         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
2041             MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
2042         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
2043         if (bio_multiple_segments(req->bio)) {
2044                 ioc->base_add_sg_single(psge, sgl_flags |
2045                     (blk_rq_bytes(req) - 4), pci_dma_out);
2046         } else {
2047                 ioc->base_add_sg_single(psge, sgl_flags |
2048                     (blk_rq_bytes(req) - 4), dma_addr_out);
2049         }
2050
2051         /* incr sgel */
2052         psge += ioc->sge_size;
2053
2054         /* READ sgel last */
2055         sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
2056             MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
2057             MPI2_SGE_FLAGS_END_OF_LIST);
2058         sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
2059         if (bio_multiple_segments(rsp->bio)) {
2060                 ioc->base_add_sg_single(psge, sgl_flags |
2061                     (blk_rq_bytes(rsp) + 4), pci_dma_in);
2062         } else {
2063                 ioc->base_add_sg_single(psge, sgl_flags |
2064                     (blk_rq_bytes(rsp) + 4), dma_addr_in);
2065         }
2066
2067         dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "%s - "
2068             "sending smp request\n", ioc->name, __func__));
2069
2070         init_completion(&ioc->transport_cmds.done);
2071         mpt2sas_base_put_smid_default(ioc, smid);
2072         timeleft = wait_for_completion_timeout(&ioc->transport_cmds.done,
2073             10*HZ);
2074
2075         if (!(ioc->transport_cmds.status & MPT2_CMD_COMPLETE)) {
2076                 printk(MPT2SAS_ERR_FMT "%s : timeout\n",
2077                     __func__, ioc->name);
2078                 _debug_dump_mf(mpi_request,
2079                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
2080                 if (!(ioc->transport_cmds.status & MPT2_CMD_RESET))
2081                         issue_reset = 1;
2082                 goto issue_host_reset;
2083         }
2084
2085         dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "%s - "
2086             "complete\n", ioc->name, __func__));
2087
2088         if (ioc->transport_cmds.status & MPT2_CMD_REPLY_VALID) {
2089
2090                 mpi_reply = ioc->transport_cmds.reply;
2091
2092                 dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
2093                     "%s - reply data transfer size(%d)\n",
2094                     ioc->name, __func__,
2095                     le16_to_cpu(mpi_reply->ResponseDataLength)));
2096
2097                 memcpy(req->sense, mpi_reply, sizeof(*mpi_reply));
2098                 req->sense_len = sizeof(*mpi_reply);
2099                 req->resid_len = 0;
2100                 rsp->resid_len -=
2101                     le16_to_cpu(mpi_reply->ResponseDataLength);
2102                 /* check if the resp needs to be copied from the allocated
2103                  * pci mem */
2104                 if (bio_multiple_segments(rsp->bio)) {
2105                         u32 offset = 0;
2106                         u32 bytes_to_copy =
2107                             le16_to_cpu(mpi_reply->ResponseDataLength);
2108                         bio_for_each_segment(bvec, rsp->bio, iter) {
2109                                 if (bytes_to_copy <= bvec.bv_len) {
2110                                         memcpy(page_address(bvec.bv_page) +
2111                                             bvec.bv_offset, pci_addr_in +
2112                                             offset, bytes_to_copy);
2113                                         break;
2114                                 } else {
2115                                         memcpy(page_address(bvec.bv_page) +
2116                                             bvec.bv_offset, pci_addr_in +
2117                                             offset, bvec.bv_len);
2118                                         bytes_to_copy -= bvec.bv_len;
2119                                 }
2120                                 offset += bvec.bv_len;
2121                         }
2122                 }
2123         } else {
2124                 dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
2125                     "%s - no reply\n", ioc->name, __func__));
2126                 rc = -ENXIO;
2127         }
2128
2129  issue_host_reset:
2130         if (issue_reset) {
2131                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
2132                     FORCE_BIG_HAMMER);
2133                 rc = -ETIMEDOUT;
2134         }
2135
2136  unmap:
2137         if (dma_addr_out)
2138                 pci_unmap_single(ioc->pdev, dma_addr_out, blk_rq_bytes(req),
2139                     PCI_DMA_BIDIRECTIONAL);
2140         if (dma_addr_in)
2141                 pci_unmap_single(ioc->pdev, dma_addr_in, blk_rq_bytes(rsp),
2142                     PCI_DMA_BIDIRECTIONAL);
2143
2144  free_pci:
2145         if (pci_addr_out)
2146                 pci_free_consistent(ioc->pdev, blk_rq_bytes(req), pci_addr_out,
2147                     pci_dma_out);
2148
2149         if (pci_addr_in)
2150                 pci_free_consistent(ioc->pdev, blk_rq_bytes(rsp), pci_addr_in,
2151                     pci_dma_in);
2152
2153  out:
2154         ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
2155         mutex_unlock(&ioc->transport_cmds.mutex);
2156         return rc;
2157 }
2158
2159 struct sas_function_template mpt2sas_transport_functions = {
2160         .get_linkerrors         = _transport_get_linkerrors,
2161         .get_enclosure_identifier = _transport_get_enclosure_identifier,
2162         .get_bay_identifier     = _transport_get_bay_identifier,
2163         .phy_reset              = _transport_phy_reset,
2164         .phy_enable             = _transport_phy_enable,
2165         .set_phy_speed          = _transport_phy_speed,
2166         .smp_handler            = _transport_smp_handler,
2167 };
2168
2169 struct scsi_transport_template *mpt2sas_transport_template;