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