drivers/scsi/mpt3sas/mpt3sas_transport.c

   1 /*
   2  * SAS Transport Layer for MPT (Message Passing Technology) based controllers
   3  *
   4  * This code is based on drivers/scsi/mpt3sas/mpt3sas_transport.c
   5  * Copyright (C) 2012-2014  LSI Corporation
   6  * Copyright (C) 2013-2014 Avago Technologies
   7  *  (mailto: MPT-FusionLinux.pdl@avagotech.com)
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * NO WARRANTY
  20  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  21  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  22  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  23  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  24  * solely responsible for determining the appropriateness of using and
  25  * distributing the Program and assumes all risks associated with its
  26  * exercise of rights under this Agreement, including but not limited to
  27  * the risks and costs of program errors, damage to or loss of data,
  28  * programs or equipment, and unavailability or interruption of operations.
  29
  30  * DISCLAIMER OF LIABILITY
  31  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  32  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  34  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  35  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  36  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  37  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  38
  39  * You should have received a copy of the GNU General Public License
  40  * along with this program; if not, write to the Free Software
  41  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  42  * USA.
  43  */
  44
  45 #include <linux/module.h>
  46 #include <linux/kernel.h>
  47 #include <linux/init.h>
  48 #include <linux/errno.h>
  49 #include <linux/sched.h>
  50 #include <linux/workqueue.h>
  51 #include <linux/delay.h>
  52 #include <linux/pci.h>
  53
  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 "mpt3sas_base.h"
  62
  63 /**
  64  * _transport_sas_node_find_by_sas_address - sas node search
  65  * @ioc: per adapter object
  66  * @sas_address: sas address of expander or sas host
  67  * Context: Calling function should acquire ioc->sas_node_lock.
  68  *
  69  * Search for either hba phys or expander device based on handle, then returns
  70  * the sas_node object.
  71  */
  72 static struct _sas_node *
  73 _transport_sas_node_find_by_sas_address(struct MPT3SAS_ADAPTER *ioc,
  74         u64 sas_address)
  75 {
  76         if (ioc->sas_hba.sas_address == sas_address)
  77                 return &ioc->sas_hba;
  78         else
  79                 return mpt3sas_scsih_expander_find_by_sas_address(ioc,
  80                     sas_address);
  81 }
  82
  83 /**
  84  * _transport_convert_phy_link_rate -
  85  * @link_rate: link rate returned from mpt firmware
  86  *
  87  * Convert link_rate from mpi fusion into sas_transport form.
  88  */
  89 static enum sas_linkrate
  90 _transport_convert_phy_link_rate(u8 link_rate)
  91 {
  92         enum sas_linkrate rc;
  93
  94         switch (link_rate) {
  95         case MPI2_SAS_NEG_LINK_RATE_1_5:
  96                 rc = SAS_LINK_RATE_1_5_GBPS;
  97                 break;
  98         case MPI2_SAS_NEG_LINK_RATE_3_0:
  99                 rc = SAS_LINK_RATE_3_0_GBPS;
 100                 break;
 101         case MPI2_SAS_NEG_LINK_RATE_6_0:
 102                 rc = SAS_LINK_RATE_6_0_GBPS;
 103                 break;
 104         case MPI25_SAS_NEG_LINK_RATE_12_0:
 105                 rc = SAS_LINK_RATE_12_0_GBPS;
 106                 break;
 107         case MPI2_SAS_NEG_LINK_RATE_PHY_DISABLED:
 108                 rc = SAS_PHY_DISABLED;
 109                 break;
 110         case MPI2_SAS_NEG_LINK_RATE_NEGOTIATION_FAILED:
 111                 rc = SAS_LINK_RATE_FAILED;
 112                 break;
 113         case MPI2_SAS_NEG_LINK_RATE_PORT_SELECTOR:
 114                 rc = SAS_SATA_PORT_SELECTOR;
 115                 break;
 116         case MPI2_SAS_NEG_LINK_RATE_SMP_RESET_IN_PROGRESS:
 117                 rc = SAS_PHY_RESET_IN_PROGRESS;
 118                 break;
 119
 120         default:
 121         case MPI2_SAS_NEG_LINK_RATE_SATA_OOB_COMPLETE:
 122         case MPI2_SAS_NEG_LINK_RATE_UNKNOWN_LINK_RATE:
 123                 rc = SAS_LINK_RATE_UNKNOWN;
 124                 break;
 125         }
 126         return rc;
 127 }
 128
 129 /**
 130  * _transport_set_identify - set identify for phys and end devices
 131  * @ioc: per adapter object
 132  * @handle: device handle
 133  * @identify: sas identify info
 134  *
 135  * Populates sas identify info.
 136  *
 137  * Return: 0 for success, non-zero for failure.
 138  */
 139 static int
 140 _transport_set_identify(struct MPT3SAS_ADAPTER *ioc, u16 handle,
 141         struct sas_identify *identify)
 142 {
 143         Mpi2SasDevicePage0_t sas_device_pg0;
 144         Mpi2ConfigReply_t mpi_reply;
 145         u32 device_info;
 146         u32 ioc_status;
 147
 148         if (ioc->shost_recovery || ioc->pci_error_recovery) {
 149                 pr_info(MPT3SAS_FMT "%s: host reset in progress!\n",
 150                     __func__, ioc->name);
 151                 return -EFAULT;
 152         }
 153
 154         if ((mpt3sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
 155             MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, handle))) {
 156                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 157                     ioc->name, __FILE__, __LINE__, __func__);
 158                 return -ENXIO;
 159         }
 160
 161         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
 162             MPI2_IOCSTATUS_MASK;
 163         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
 164                 pr_err(MPT3SAS_FMT
 165                         "handle(0x%04x), ioc_status(0x%04x)\nfailure at %s:%d/%s()!\n",
 166                         ioc->name, handle, ioc_status,
 167                      __FILE__, __LINE__, __func__);
 168                 return -EIO;
 169         }
 170
 171         memset(identify, 0, sizeof(struct sas_identify));
 172         device_info = le32_to_cpu(sas_device_pg0.DeviceInfo);
 173
 174         /* sas_address */
 175         identify->sas_address = le64_to_cpu(sas_device_pg0.SASAddress);
 176
 177         /* phy number of the parent device this device is linked to */
 178         identify->phy_identifier = sas_device_pg0.PhyNum;
 179
 180         /* device_type */
 181         switch (device_info & MPI2_SAS_DEVICE_INFO_MASK_DEVICE_TYPE) {
 182         case MPI2_SAS_DEVICE_INFO_NO_DEVICE:
 183                 identify->device_type = SAS_PHY_UNUSED;
 184                 break;
 185         case MPI2_SAS_DEVICE_INFO_END_DEVICE:
 186                 identify->device_type = SAS_END_DEVICE;
 187                 break;
 188         case MPI2_SAS_DEVICE_INFO_EDGE_EXPANDER:
 189                 identify->device_type = SAS_EDGE_EXPANDER_DEVICE;
 190                 break;
 191         case MPI2_SAS_DEVICE_INFO_FANOUT_EXPANDER:
 192                 identify->device_type = SAS_FANOUT_EXPANDER_DEVICE;
 193                 break;
 194         }
 195
 196         /* initiator_port_protocols */
 197         if (device_info & MPI2_SAS_DEVICE_INFO_SSP_INITIATOR)
 198                 identify->initiator_port_protocols |= SAS_PROTOCOL_SSP;
 199         if (device_info & MPI2_SAS_DEVICE_INFO_STP_INITIATOR)
 200                 identify->initiator_port_protocols |= SAS_PROTOCOL_STP;
 201         if (device_info & MPI2_SAS_DEVICE_INFO_SMP_INITIATOR)
 202                 identify->initiator_port_protocols |= SAS_PROTOCOL_SMP;
 203         if (device_info & MPI2_SAS_DEVICE_INFO_SATA_HOST)
 204                 identify->initiator_port_protocols |= SAS_PROTOCOL_SATA;
 205
 206         /* target_port_protocols */
 207         if (device_info & MPI2_SAS_DEVICE_INFO_SSP_TARGET)
 208                 identify->target_port_protocols |= SAS_PROTOCOL_SSP;
 209         if (device_info & MPI2_SAS_DEVICE_INFO_STP_TARGET)
 210                 identify->target_port_protocols |= SAS_PROTOCOL_STP;
 211         if (device_info & MPI2_SAS_DEVICE_INFO_SMP_TARGET)
 212                 identify->target_port_protocols |= SAS_PROTOCOL_SMP;
 213         if (device_info & MPI2_SAS_DEVICE_INFO_SATA_DEVICE)
 214                 identify->target_port_protocols |= SAS_PROTOCOL_SATA;
 215
 216         return 0;
 217 }
 218
 219 /**
 220  * mpt3sas_transport_done -  internal transport layer callback handler.
 221  * @ioc: per adapter object
 222  * @smid: system request message index
 223  * @msix_index: MSIX table index supplied by the OS
 224  * @reply: reply message frame(lower 32bit addr)
 225  *
 226  * Callback handler when sending internal generated transport cmds.
 227  * The callback index passed is `ioc->transport_cb_idx`
 228  *
 229  * Return: 1 meaning mf should be freed from _base_interrupt
 230  *         0 means the mf is freed from this function.
 231  */
 232 u8
 233 mpt3sas_transport_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
 234         u32 reply)
 235 {
 236         MPI2DefaultReply_t *mpi_reply;
 237
 238         mpi_reply =  mpt3sas_base_get_reply_virt_addr(ioc, reply);
 239         if (ioc->transport_cmds.status == MPT3_CMD_NOT_USED)
 240                 return 1;
 241         if (ioc->transport_cmds.smid != smid)
 242                 return 1;
 243         ioc->transport_cmds.status |= MPT3_CMD_COMPLETE;
 244         if (mpi_reply) {
 245                 memcpy(ioc->transport_cmds.reply, mpi_reply,
 246                     mpi_reply->MsgLength*4);
 247                 ioc->transport_cmds.status |= MPT3_CMD_REPLY_VALID;
 248         }
 249         ioc->transport_cmds.status &= ~MPT3_CMD_PENDING;
 250         complete(&ioc->transport_cmds.done);
 251         return 1;
 252 }
 253
 254 /* report manufacture request structure */
 255 struct rep_manu_request {
 256         u8 smp_frame_type;
 257         u8 function;
 258         u8 reserved;
 259         u8 request_length;
 260 };
 261
 262 /* report manufacture reply structure */
 263 struct rep_manu_reply {
 264         u8 smp_frame_type; /* 0x41 */
 265         u8 function; /* 0x01 */
 266         u8 function_result;
 267         u8 response_length;
 268         u16 expander_change_count;
 269         u8 reserved0[2];
 270         u8 sas_format;
 271         u8 reserved2[3];
 272         u8 vendor_id[SAS_EXPANDER_VENDOR_ID_LEN];
 273         u8 product_id[SAS_EXPANDER_PRODUCT_ID_LEN];
 274         u8 product_rev[SAS_EXPANDER_PRODUCT_REV_LEN];
 275         u8 component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN];
 276         u16 component_id;
 277         u8 component_revision_id;
 278         u8 reserved3;
 279         u8 vendor_specific[8];
 280 };
 281
 282 /**
 283  * transport_expander_report_manufacture - obtain SMP report_manufacture
 284  * @ioc: per adapter object
 285  * @sas_address: expander sas address
 286  * @edev: the sas_expander_device object
 287  *
 288  * Fills in the sas_expander_device object when SMP port is created.
 289  *
 290  * Return: 0 for success, non-zero for failure.
 291  */
 292 static int
 293 _transport_expander_report_manufacture(struct MPT3SAS_ADAPTER *ioc,
 294         u64 sas_address, struct sas_expander_device *edev)
 295 {
 296         Mpi2SmpPassthroughRequest_t *mpi_request;
 297         Mpi2SmpPassthroughReply_t *mpi_reply;
 298         struct rep_manu_reply *manufacture_reply;
 299         struct rep_manu_request *manufacture_request;
 300         int rc;
 301         u16 smid;
 302         u32 ioc_state;
 303         void *psge;
 304         u8 issue_reset = 0;
 305         void *data_out = NULL;
 306         dma_addr_t data_out_dma;
 307         dma_addr_t data_in_dma;
 308         size_t data_in_sz;
 309         size_t data_out_sz;
 310         u16 wait_state_count;
 311
 312         if (ioc->shost_recovery || ioc->pci_error_recovery) {
 313                 pr_info(MPT3SAS_FMT "%s: host reset in progress!\n",
 314                     __func__, ioc->name);
 315                 return -EFAULT;
 316         }
 317
 318         mutex_lock(&ioc->transport_cmds.mutex);
 319
 320         if (ioc->transport_cmds.status != MPT3_CMD_NOT_USED) {
 321                 pr_err(MPT3SAS_FMT "%s: transport_cmds in use\n",
 322                     ioc->name, __func__);
 323                 rc = -EAGAIN;
 324                 goto out;
 325         }
 326         ioc->transport_cmds.status = MPT3_CMD_PENDING;
 327
 328         wait_state_count = 0;
 329         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
 330         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
 331                 if (wait_state_count++ == 10) {
 332                         pr_err(MPT3SAS_FMT
 333                             "%s: failed due to ioc not operational\n",
 334                             ioc->name, __func__);
 335                         rc = -EFAULT;
 336                         goto out;
 337                 }
 338                 ssleep(1);
 339                 ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
 340                 pr_info(MPT3SAS_FMT
 341                         "%s: waiting for operational state(count=%d)\n",
 342                         ioc->name, __func__, wait_state_count);
 343         }
 344         if (wait_state_count)
 345                 pr_info(MPT3SAS_FMT "%s: ioc is operational\n",
 346                     ioc->name, __func__);
 347
 348         smid = mpt3sas_base_get_smid(ioc, ioc->transport_cb_idx);
 349         if (!smid) {
 350                 pr_err(MPT3SAS_FMT "%s: failed obtaining a smid\n",
 351                     ioc->name, __func__);
 352                 rc = -EAGAIN;
 353                 goto out;
 354         }
 355
 356         rc = 0;
 357         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
 358         ioc->transport_cmds.smid = smid;
 359
 360         data_out_sz = sizeof(struct rep_manu_request);
 361         data_in_sz = sizeof(struct rep_manu_reply);
 362         data_out = pci_alloc_consistent(ioc->pdev, data_out_sz + data_in_sz,
 363             &data_out_dma);
 364
 365         if (!data_out) {
 366                 pr_err("failure at %s:%d/%s()!\n", __FILE__,
 367                     __LINE__, __func__);
 368                 rc = -ENOMEM;
 369                 mpt3sas_base_free_smid(ioc, smid);
 370                 goto out;
 371         }
 372
 373         data_in_dma = data_out_dma + sizeof(struct rep_manu_request);
 374
 375         manufacture_request = data_out;
 376         manufacture_request->smp_frame_type = 0x40;
 377         manufacture_request->function = 1;
 378         manufacture_request->reserved = 0;
 379         manufacture_request->request_length = 0;
 380
 381         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
 382         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
 383         mpi_request->PhysicalPort = 0xFF;
 384         mpi_request->SASAddress = cpu_to_le64(sas_address);
 385         mpi_request->RequestDataLength = cpu_to_le16(data_out_sz);
 386         psge = &mpi_request->SGL;
 387
 388         ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
 389             data_in_sz);
 390
 391         dtransportprintk(ioc, pr_info(MPT3SAS_FMT
 392                 "report_manufacture - send to sas_addr(0x%016llx)\n",
 393                 ioc->name, (unsigned long long)sas_address));
 394         init_completion(&ioc->transport_cmds.done);
 395         mpt3sas_base_put_smid_default(ioc, smid);
 396         wait_for_completion_timeout(&ioc->transport_cmds.done, 10*HZ);
 397
 398         if (!(ioc->transport_cmds.status & MPT3_CMD_COMPLETE)) {
 399                 pr_err(MPT3SAS_FMT "%s: timeout\n",
 400                     ioc->name, __func__);
 401                 _debug_dump_mf(mpi_request,
 402                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
 403                 if (!(ioc->transport_cmds.status & MPT3_CMD_RESET))
 404                         issue_reset = 1;
 405                 goto issue_host_reset;
 406         }
 407
 408         dtransportprintk(ioc, pr_info(MPT3SAS_FMT
 409                 "report_manufacture - complete\n", ioc->name));
 410
 411         if (ioc->transport_cmds.status & MPT3_CMD_REPLY_VALID) {
 412                 u8 *tmp;
 413
 414                 mpi_reply = ioc->transport_cmds.reply;
 415
 416                 dtransportprintk(ioc, pr_info(MPT3SAS_FMT
 417                     "report_manufacture - reply data transfer size(%d)\n",
 418                     ioc->name, le16_to_cpu(mpi_reply->ResponseDataLength)));
 419
 420                 if (le16_to_cpu(mpi_reply->ResponseDataLength) !=
 421                     sizeof(struct rep_manu_reply))
 422                         goto out;
 423
 424                 manufacture_reply = data_out + sizeof(struct rep_manu_request);
 425                 strncpy(edev->vendor_id, manufacture_reply->vendor_id,
 426                      SAS_EXPANDER_VENDOR_ID_LEN);
 427                 strncpy(edev->product_id, manufacture_reply->product_id,
 428                      SAS_EXPANDER_PRODUCT_ID_LEN);
 429                 strncpy(edev->product_rev, manufacture_reply->product_rev,
 430                      SAS_EXPANDER_PRODUCT_REV_LEN);
 431                 edev->level = manufacture_reply->sas_format & 1;
 432                 if (edev->level) {
 433                         strncpy(edev->component_vendor_id,
 434                             manufacture_reply->component_vendor_id,
 435                              SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
 436                         tmp = (u8 *)&manufacture_reply->component_id;
 437                         edev->component_id = tmp[0] << 8 | tmp[1];
 438                         edev->component_revision_id =
 439                             manufacture_reply->component_revision_id;
 440                 }
 441         } else
 442                 dtransportprintk(ioc, pr_info(MPT3SAS_FMT
 443                     "report_manufacture - no reply\n", ioc->name));
 444
 445  issue_host_reset:
 446         if (issue_reset)
 447                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
 448  out:
 449         ioc->transport_cmds.status = MPT3_CMD_NOT_USED;
 450         if (data_out)
 451                 pci_free_consistent(ioc->pdev, data_out_sz + data_in_sz,
 452                     data_out, data_out_dma);
 453
 454         mutex_unlock(&ioc->transport_cmds.mutex);
 455         return rc;
 456 }
 457
 458
 459 /**
 460  * _transport_delete_port - helper function to removing a port
 461  * @ioc: per adapter object
 462  * @mpt3sas_port: mpt3sas per port object
 463  */
 464 static void
 465 _transport_delete_port(struct MPT3SAS_ADAPTER *ioc,
 466         struct _sas_port *mpt3sas_port)
 467 {
 468         u64 sas_address = mpt3sas_port->remote_identify.sas_address;
 469         enum sas_device_type device_type =
 470             mpt3sas_port->remote_identify.device_type;
 471
 472         dev_printk(KERN_INFO, &mpt3sas_port->port->dev,
 473             "remove: sas_addr(0x%016llx)\n",
 474             (unsigned long long) sas_address);
 475
 476         ioc->logging_level |= MPT_DEBUG_TRANSPORT;
 477         if (device_type == SAS_END_DEVICE)
 478                 mpt3sas_device_remove_by_sas_address(ioc, sas_address);
 479         else if (device_type == SAS_EDGE_EXPANDER_DEVICE ||
 480             device_type == SAS_FANOUT_EXPANDER_DEVICE)
 481                 mpt3sas_expander_remove(ioc, sas_address);
 482         ioc->logging_level &= ~MPT_DEBUG_TRANSPORT;
 483 }
 484
 485 /**
 486  * _transport_delete_phy - helper function to removing single phy from port
 487  * @ioc: per adapter object
 488  * @mpt3sas_port: mpt3sas per port object
 489  * @mpt3sas_phy: mpt3sas per phy object
 490  */
 491 static void
 492 _transport_delete_phy(struct MPT3SAS_ADAPTER *ioc,
 493         struct _sas_port *mpt3sas_port, struct _sas_phy *mpt3sas_phy)
 494 {
 495         u64 sas_address = mpt3sas_port->remote_identify.sas_address;
 496
 497         dev_printk(KERN_INFO, &mpt3sas_phy->phy->dev,
 498             "remove: sas_addr(0x%016llx), phy(%d)\n",
 499             (unsigned long long) sas_address, mpt3sas_phy->phy_id);
 500
 501         list_del(&mpt3sas_phy->port_siblings);
 502         mpt3sas_port->num_phys--;
 503         sas_port_delete_phy(mpt3sas_port->port, mpt3sas_phy->phy);
 504         mpt3sas_phy->phy_belongs_to_port = 0;
 505 }
 506
 507 /**
 508  * _transport_add_phy - helper function to adding single phy to port
 509  * @ioc: per adapter object
 510  * @mpt3sas_port: mpt3sas per port object
 511  * @mpt3sas_phy: mpt3sas per phy object
 512  */
 513 static void
 514 _transport_add_phy(struct MPT3SAS_ADAPTER *ioc, struct _sas_port *mpt3sas_port,
 515         struct _sas_phy *mpt3sas_phy)
 516 {
 517         u64 sas_address = mpt3sas_port->remote_identify.sas_address;
 518
 519         dev_printk(KERN_INFO, &mpt3sas_phy->phy->dev,
 520             "add: sas_addr(0x%016llx), phy(%d)\n", (unsigned long long)
 521             sas_address, mpt3sas_phy->phy_id);
 522
 523         list_add_tail(&mpt3sas_phy->port_siblings, &mpt3sas_port->phy_list);
 524         mpt3sas_port->num_phys++;
 525         sas_port_add_phy(mpt3sas_port->port, mpt3sas_phy->phy);
 526         mpt3sas_phy->phy_belongs_to_port = 1;
 527 }
 528
 529 /**
 530  * _transport_add_phy_to_an_existing_port - adding new phy to existing port
 531  * @ioc: per adapter object
 532  * @sas_node: sas node object (either expander or sas host)
 533  * @mpt3sas_phy: mpt3sas per phy object
 534  * @sas_address: sas address of device/expander were phy needs to be added to
 535  */
 536 static void
 537 _transport_add_phy_to_an_existing_port(struct MPT3SAS_ADAPTER *ioc,
 538         struct _sas_node *sas_node, struct _sas_phy *mpt3sas_phy,
 539         u64 sas_address)
 540 {
 541         struct _sas_port *mpt3sas_port;
 542         struct _sas_phy *phy_srch;
 543
 544         if (mpt3sas_phy->phy_belongs_to_port == 1)
 545                 return;
 546
 547         list_for_each_entry(mpt3sas_port, &sas_node->sas_port_list,
 548             port_list) {
 549                 if (mpt3sas_port->remote_identify.sas_address !=
 550                     sas_address)
 551                         continue;
 552                 list_for_each_entry(phy_srch, &mpt3sas_port->phy_list,
 553                     port_siblings) {
 554                         if (phy_srch == mpt3sas_phy)
 555                                 return;
 556                 }
 557                 _transport_add_phy(ioc, mpt3sas_port, mpt3sas_phy);
 558                 return;
 559         }
 560
 561 }
 562
 563 /**
 564  * _transport_del_phy_from_an_existing_port - delete phy from existing port
 565  * @ioc: per adapter object
 566  * @sas_node: sas node object (either expander or sas host)
 567  * @mpt3sas_phy: mpt3sas per phy object
 568  */
 569 static void
 570 _transport_del_phy_from_an_existing_port(struct MPT3SAS_ADAPTER *ioc,
 571         struct _sas_node *sas_node, struct _sas_phy *mpt3sas_phy)
 572 {
 573         struct _sas_port *mpt3sas_port, *next;
 574         struct _sas_phy *phy_srch;
 575
 576         if (mpt3sas_phy->phy_belongs_to_port == 0)
 577                 return;
 578
 579         list_for_each_entry_safe(mpt3sas_port, next, &sas_node->sas_port_list,
 580             port_list) {
 581                 list_for_each_entry(phy_srch, &mpt3sas_port->phy_list,
 582                     port_siblings) {
 583                         if (phy_srch != mpt3sas_phy)
 584                                 continue;
 585
 586                         if (mpt3sas_port->num_phys == 1)
 587                                 _transport_delete_port(ioc, mpt3sas_port);
 588                         else
 589                                 _transport_delete_phy(ioc, mpt3sas_port,
 590                                     mpt3sas_phy);
 591                         return;
 592                 }
 593         }
 594 }
 595
 596 /**
 597  * _transport_sanity_check - sanity check when adding a new port
 598  * @ioc: per adapter object
 599  * @sas_node: sas node object (either expander or sas host)
 600  * @sas_address: sas address of device being added
 601  *
 602  * See the explanation above from _transport_delete_duplicate_port
 603  */
 604 static void
 605 _transport_sanity_check(struct MPT3SAS_ADAPTER *ioc, struct _sas_node *sas_node,
 606         u64 sas_address)
 607 {
 608         int i;
 609
 610         for (i = 0; i < sas_node->num_phys; i++) {
 611                 if (sas_node->phy[i].remote_identify.sas_address != sas_address)
 612                         continue;
 613                 if (sas_node->phy[i].phy_belongs_to_port == 1)
 614                         _transport_del_phy_from_an_existing_port(ioc, sas_node,
 615                             &sas_node->phy[i]);
 616         }
 617 }
 618
 619 /**
 620  * mpt3sas_transport_port_add - insert port to the list
 621  * @ioc: per adapter object
 622  * @handle: handle of attached device
 623  * @sas_address: sas address of parent expander or sas host
 624  * Context: This function will acquire ioc->sas_node_lock.
 625  *
 626  * Adding new port object to the sas_node->sas_port_list.
 627  *
 628  * Return: mpt3sas_port.
 629  */
 630 struct _sas_port *
 631 mpt3sas_transport_port_add(struct MPT3SAS_ADAPTER *ioc, u16 handle,
 632         u64 sas_address)
 633 {
 634         struct _sas_phy *mpt3sas_phy, *next;
 635         struct _sas_port *mpt3sas_port;
 636         unsigned long flags;
 637         struct _sas_node *sas_node;
 638         struct sas_rphy *rphy;
 639         struct _sas_device *sas_device = NULL;
 640         int i;
 641         struct sas_port *port;
 642
 643         mpt3sas_port = kzalloc(sizeof(struct _sas_port),
 644             GFP_KERNEL);
 645         if (!mpt3sas_port) {
 646                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 647                     ioc->name, __FILE__, __LINE__, __func__);
 648                 return NULL;
 649         }
 650
 651         INIT_LIST_HEAD(&mpt3sas_port->port_list);
 652         INIT_LIST_HEAD(&mpt3sas_port->phy_list);
 653         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 654         sas_node = _transport_sas_node_find_by_sas_address(ioc, sas_address);
 655         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 656
 657         if (!sas_node) {
 658                 pr_err(MPT3SAS_FMT
 659                         "%s: Could not find parent sas_address(0x%016llx)!\n",
 660                         ioc->name, __func__, (unsigned long long)sas_address);
 661                 goto out_fail;
 662         }
 663
 664         if ((_transport_set_identify(ioc, handle,
 665             &mpt3sas_port->remote_identify))) {
 666                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 667                     ioc->name, __FILE__, __LINE__, __func__);
 668                 goto out_fail;
 669         }
 670
 671         if (mpt3sas_port->remote_identify.device_type == SAS_PHY_UNUSED) {
 672                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 673                     ioc->name, __FILE__, __LINE__, __func__);
 674                 goto out_fail;
 675         }
 676
 677         _transport_sanity_check(ioc, sas_node,
 678             mpt3sas_port->remote_identify.sas_address);
 679
 680         for (i = 0; i < sas_node->num_phys; i++) {
 681                 if (sas_node->phy[i].remote_identify.sas_address !=
 682                     mpt3sas_port->remote_identify.sas_address)
 683                         continue;
 684                 list_add_tail(&sas_node->phy[i].port_siblings,
 685                     &mpt3sas_port->phy_list);
 686                 mpt3sas_port->num_phys++;
 687         }
 688
 689         if (!mpt3sas_port->num_phys) {
 690                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 691                     ioc->name, __FILE__, __LINE__, __func__);
 692                 goto out_fail;
 693         }
 694
 695         if (!sas_node->parent_dev) {
 696                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 697                     ioc->name, __FILE__, __LINE__, __func__);
 698                 goto out_fail;
 699         }
 700         port = sas_port_alloc_num(sas_node->parent_dev);
 701         if ((sas_port_add(port))) {
 702                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 703                     ioc->name, __FILE__, __LINE__, __func__);
 704                 goto out_fail;
 705         }
 706
 707         list_for_each_entry(mpt3sas_phy, &mpt3sas_port->phy_list,
 708             port_siblings) {
 709                 if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 710                         dev_printk(KERN_INFO, &port->dev,
 711                                 "add: handle(0x%04x), sas_addr(0x%016llx), phy(%d)\n",
 712                                 handle, (unsigned long long)
 713                             mpt3sas_port->remote_identify.sas_address,
 714                             mpt3sas_phy->phy_id);
 715                 sas_port_add_phy(port, mpt3sas_phy->phy);
 716                 mpt3sas_phy->phy_belongs_to_port = 1;
 717         }
 718
 719         mpt3sas_port->port = port;
 720         if (mpt3sas_port->remote_identify.device_type == SAS_END_DEVICE)
 721                 rphy = sas_end_device_alloc(port);
 722         else
 723                 rphy = sas_expander_alloc(port,
 724                     mpt3sas_port->remote_identify.device_type);
 725
 726         rphy->identify = mpt3sas_port->remote_identify;
 727
 728         if (mpt3sas_port->remote_identify.device_type == SAS_END_DEVICE) {
 729                 sas_device = mpt3sas_get_sdev_by_addr(ioc,
 730                                     mpt3sas_port->remote_identify.sas_address);
 731                 if (!sas_device) {
 732                         dfailprintk(ioc, printk(MPT3SAS_FMT
 733                                 "failure at %s:%d/%s()!\n",
 734                                 ioc->name, __FILE__, __LINE__, __func__));
 735                         goto out_fail;
 736                 }
 737                 sas_device->pend_sas_rphy_add = 1;
 738         }
 739
 740         if ((sas_rphy_add(rphy))) {
 741                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 742                     ioc->name, __FILE__, __LINE__, __func__);
 743         }
 744
 745         if (mpt3sas_port->remote_identify.device_type == SAS_END_DEVICE) {
 746                 sas_device->pend_sas_rphy_add = 0;
 747                 sas_device_put(sas_device);
 748         }
 749
 750         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 751                 dev_printk(KERN_INFO, &rphy->dev,
 752                         "add: handle(0x%04x), sas_addr(0x%016llx)\n",
 753                         handle, (unsigned long long)
 754                     mpt3sas_port->remote_identify.sas_address);
 755         mpt3sas_port->rphy = rphy;
 756         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 757         list_add_tail(&mpt3sas_port->port_list, &sas_node->sas_port_list);
 758         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 759
 760         /* fill in report manufacture */
 761         if (mpt3sas_port->remote_identify.device_type ==
 762             MPI2_SAS_DEVICE_INFO_EDGE_EXPANDER ||
 763             mpt3sas_port->remote_identify.device_type ==
 764             MPI2_SAS_DEVICE_INFO_FANOUT_EXPANDER)
 765                 _transport_expander_report_manufacture(ioc,
 766                     mpt3sas_port->remote_identify.sas_address,
 767                     rphy_to_expander_device(rphy));
 768         return mpt3sas_port;
 769
 770  out_fail:
 771         list_for_each_entry_safe(mpt3sas_phy, next, &mpt3sas_port->phy_list,
 772             port_siblings)
 773                 list_del(&mpt3sas_phy->port_siblings);
 774         kfree(mpt3sas_port);
 775         return NULL;
 776 }
 777
 778 /**
 779  * mpt3sas_transport_port_remove - remove port from the list
 780  * @ioc: per adapter object
 781  * @sas_address: sas address of attached device
 782  * @sas_address_parent: sas address of parent expander or sas host
 783  * Context: This function will acquire ioc->sas_node_lock.
 784  *
 785  * Removing object and freeing associated memory from the
 786  * ioc->sas_port_list.
 787  */
 788 void
 789 mpt3sas_transport_port_remove(struct MPT3SAS_ADAPTER *ioc, u64 sas_address,
 790         u64 sas_address_parent)
 791 {
 792         int i;
 793         unsigned long flags;
 794         struct _sas_port *mpt3sas_port, *next;
 795         struct _sas_node *sas_node;
 796         u8 found = 0;
 797         struct _sas_phy *mpt3sas_phy, *next_phy;
 798
 799         spin_lock_irqsave(&ioc->sas_node_lock, flags);
 800         sas_node = _transport_sas_node_find_by_sas_address(ioc,
 801             sas_address_parent);
 802         if (!sas_node) {
 803                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 804                 return;
 805         }
 806         list_for_each_entry_safe(mpt3sas_port, next, &sas_node->sas_port_list,
 807             port_list) {
 808                 if (mpt3sas_port->remote_identify.sas_address != sas_address)
 809                         continue;
 810                 found = 1;
 811                 list_del(&mpt3sas_port->port_list);
 812                 goto out;
 813         }
 814  out:
 815         if (!found) {
 816                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 817                 return;
 818         }
 819
 820         for (i = 0; i < sas_node->num_phys; i++) {
 821                 if (sas_node->phy[i].remote_identify.sas_address == sas_address)
 822                         memset(&sas_node->phy[i].remote_identify, 0 ,
 823                             sizeof(struct sas_identify));
 824         }
 825
 826         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
 827
 828         list_for_each_entry_safe(mpt3sas_phy, next_phy,
 829             &mpt3sas_port->phy_list, port_siblings) {
 830                 if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 831                         dev_printk(KERN_INFO, &mpt3sas_port->port->dev,
 832                             "remove: sas_addr(0x%016llx), phy(%d)\n",
 833                             (unsigned long long)
 834                             mpt3sas_port->remote_identify.sas_address,
 835                             mpt3sas_phy->phy_id);
 836                 mpt3sas_phy->phy_belongs_to_port = 0;
 837                 sas_port_delete_phy(mpt3sas_port->port, mpt3sas_phy->phy);
 838                 list_del(&mpt3sas_phy->port_siblings);
 839         }
 840         sas_port_delete(mpt3sas_port->port);
 841         kfree(mpt3sas_port);
 842 }
 843
 844 /**
 845  * mpt3sas_transport_add_host_phy - report sas_host phy to transport
 846  * @ioc: per adapter object
 847  * @mpt3sas_phy: mpt3sas per phy object
 848  * @phy_pg0: sas phy page 0
 849  * @parent_dev: parent device class object
 850  *
 851  * Return: 0 for success, non-zero for failure.
 852  */
 853 int
 854 mpt3sas_transport_add_host_phy(struct MPT3SAS_ADAPTER *ioc, struct _sas_phy
 855         *mpt3sas_phy, Mpi2SasPhyPage0_t phy_pg0, struct device *parent_dev)
 856 {
 857         struct sas_phy *phy;
 858         int phy_index = mpt3sas_phy->phy_id;
 859
 860
 861         INIT_LIST_HEAD(&mpt3sas_phy->port_siblings);
 862         phy = sas_phy_alloc(parent_dev, phy_index);
 863         if (!phy) {
 864                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 865                     ioc->name, __FILE__, __LINE__, __func__);
 866                 return -1;
 867         }
 868         if ((_transport_set_identify(ioc, mpt3sas_phy->handle,
 869             &mpt3sas_phy->identify))) {
 870                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 871                     ioc->name, __FILE__, __LINE__, __func__);
 872                 sas_phy_free(phy);
 873                 return -1;
 874         }
 875         phy->identify = mpt3sas_phy->identify;
 876         mpt3sas_phy->attached_handle = le16_to_cpu(phy_pg0.AttachedDevHandle);
 877         if (mpt3sas_phy->attached_handle)
 878                 _transport_set_identify(ioc, mpt3sas_phy->attached_handle,
 879                     &mpt3sas_phy->remote_identify);
 880         phy->identify.phy_identifier = mpt3sas_phy->phy_id;
 881         phy->negotiated_linkrate = _transport_convert_phy_link_rate(
 882             phy_pg0.NegotiatedLinkRate & MPI2_SAS_NEG_LINK_RATE_MASK_PHYSICAL);
 883         phy->minimum_linkrate_hw = _transport_convert_phy_link_rate(
 884             phy_pg0.HwLinkRate & MPI2_SAS_HWRATE_MIN_RATE_MASK);
 885         phy->maximum_linkrate_hw = _transport_convert_phy_link_rate(
 886             phy_pg0.HwLinkRate >> 4);
 887         phy->minimum_linkrate = _transport_convert_phy_link_rate(
 888             phy_pg0.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
 889         phy->maximum_linkrate = _transport_convert_phy_link_rate(
 890             phy_pg0.ProgrammedLinkRate >> 4);
 891
 892         if ((sas_phy_add(phy))) {
 893                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 894                     ioc->name, __FILE__, __LINE__, __func__);
 895                 sas_phy_free(phy);
 896                 return -1;
 897         }
 898         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 899                 dev_printk(KERN_INFO, &phy->dev,
 900                     "add: handle(0x%04x), sas_addr(0x%016llx)\n"
 901                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
 902                     mpt3sas_phy->handle, (unsigned long long)
 903                     mpt3sas_phy->identify.sas_address,
 904                     mpt3sas_phy->attached_handle,
 905                     (unsigned long long)
 906                     mpt3sas_phy->remote_identify.sas_address);
 907         mpt3sas_phy->phy = phy;
 908         return 0;
 909 }
 910
 911
 912 /**
 913  * mpt3sas_transport_add_expander_phy - report expander phy to transport
 914  * @ioc: per adapter object
 915  * @mpt3sas_phy: mpt3sas per phy object
 916  * @expander_pg1: expander page 1
 917  * @parent_dev: parent device class object
 918  *
 919  * Return: 0 for success, non-zero for failure.
 920  */
 921 int
 922 mpt3sas_transport_add_expander_phy(struct MPT3SAS_ADAPTER *ioc, struct _sas_phy
 923         *mpt3sas_phy, Mpi2ExpanderPage1_t expander_pg1,
 924         struct device *parent_dev)
 925 {
 926         struct sas_phy *phy;
 927         int phy_index = mpt3sas_phy->phy_id;
 928
 929         INIT_LIST_HEAD(&mpt3sas_phy->port_siblings);
 930         phy = sas_phy_alloc(parent_dev, phy_index);
 931         if (!phy) {
 932                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 933                     ioc->name, __FILE__, __LINE__, __func__);
 934                 return -1;
 935         }
 936         if ((_transport_set_identify(ioc, mpt3sas_phy->handle,
 937             &mpt3sas_phy->identify))) {
 938                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 939                     ioc->name, __FILE__, __LINE__, __func__);
 940                 sas_phy_free(phy);
 941                 return -1;
 942         }
 943         phy->identify = mpt3sas_phy->identify;
 944         mpt3sas_phy->attached_handle =
 945             le16_to_cpu(expander_pg1.AttachedDevHandle);
 946         if (mpt3sas_phy->attached_handle)
 947                 _transport_set_identify(ioc, mpt3sas_phy->attached_handle,
 948                     &mpt3sas_phy->remote_identify);
 949         phy->identify.phy_identifier = mpt3sas_phy->phy_id;
 950         phy->negotiated_linkrate = _transport_convert_phy_link_rate(
 951             expander_pg1.NegotiatedLinkRate &
 952             MPI2_SAS_NEG_LINK_RATE_MASK_PHYSICAL);
 953         phy->minimum_linkrate_hw = _transport_convert_phy_link_rate(
 954             expander_pg1.HwLinkRate & MPI2_SAS_HWRATE_MIN_RATE_MASK);
 955         phy->maximum_linkrate_hw = _transport_convert_phy_link_rate(
 956             expander_pg1.HwLinkRate >> 4);
 957         phy->minimum_linkrate = _transport_convert_phy_link_rate(
 958             expander_pg1.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
 959         phy->maximum_linkrate = _transport_convert_phy_link_rate(
 960             expander_pg1.ProgrammedLinkRate >> 4);
 961
 962         if ((sas_phy_add(phy))) {
 963                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
 964                     ioc->name, __FILE__, __LINE__, __func__);
 965                 sas_phy_free(phy);
 966                 return -1;
 967         }
 968         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
 969                 dev_printk(KERN_INFO, &phy->dev,
 970                     "add: handle(0x%04x), sas_addr(0x%016llx)\n"
 971                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
 972                     mpt3sas_phy->handle, (unsigned long long)
 973                     mpt3sas_phy->identify.sas_address,
 974                     mpt3sas_phy->attached_handle,
 975                     (unsigned long long)
 976                     mpt3sas_phy->remote_identify.sas_address);
 977         mpt3sas_phy->phy = phy;
 978         return 0;
 979 }
 980
 981 /**
 982  * mpt3sas_transport_update_links - refreshing phy link changes
 983  * @ioc: per adapter object
 984  * @sas_address: sas address of parent expander or sas host
 985  * @handle: attached device handle
 986  * @phy_number: phy number
 987  * @link_rate: new link rate
 988  */
 989 void
 990 mpt3sas_transport_update_links(struct MPT3SAS_ADAPTER *ioc,
 991         u64 sas_address, u16 handle, u8 phy_number, u8 link_rate)
 992 {
 993         unsigned long flags;
 994         struct _sas_node *sas_node;
 995         struct _sas_phy *mpt3sas_phy;
 996
 997         if (ioc->shost_recovery || ioc->pci_error_recovery)
 998                 return;
 999
1000         spin_lock_irqsave(&ioc->sas_node_lock, flags);
1001         sas_node = _transport_sas_node_find_by_sas_address(ioc, sas_address);
1002         if (!sas_node) {
1003                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1004                 return;
1005         }
1006
1007         mpt3sas_phy = &sas_node->phy[phy_number];
1008         mpt3sas_phy->attached_handle = handle;
1009         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1010         if (handle && (link_rate >= MPI2_SAS_NEG_LINK_RATE_1_5)) {
1011                 _transport_set_identify(ioc, handle,
1012                     &mpt3sas_phy->remote_identify);
1013                 _transport_add_phy_to_an_existing_port(ioc, sas_node,
1014                     mpt3sas_phy, mpt3sas_phy->remote_identify.sas_address);
1015         } else
1016                 memset(&mpt3sas_phy->remote_identify, 0 , sizeof(struct
1017                     sas_identify));
1018
1019         if (mpt3sas_phy->phy)
1020                 mpt3sas_phy->phy->negotiated_linkrate =
1021                     _transport_convert_phy_link_rate(link_rate);
1022
1023         if ((ioc->logging_level & MPT_DEBUG_TRANSPORT))
1024                 dev_printk(KERN_INFO, &mpt3sas_phy->phy->dev,
1025                     "refresh: parent sas_addr(0x%016llx),\n"
1026                     "\tlink_rate(0x%02x), phy(%d)\n"
1027                     "\tattached_handle(0x%04x), sas_addr(0x%016llx)\n",
1028                     (unsigned long long)sas_address,
1029                     link_rate, phy_number, handle, (unsigned long long)
1030                     mpt3sas_phy->remote_identify.sas_address);
1031 }
1032
1033 static inline void *
1034 phy_to_ioc(struct sas_phy *phy)
1035 {
1036         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1037         return shost_priv(shost);
1038 }
1039
1040 static inline void *
1041 rphy_to_ioc(struct sas_rphy *rphy)
1042 {
1043         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1044         return shost_priv(shost);
1045 }
1046
1047 /* report phy error log structure */
1048 struct phy_error_log_request {
1049         u8 smp_frame_type; /* 0x40 */
1050         u8 function; /* 0x11 */
1051         u8 allocated_response_length;
1052         u8 request_length; /* 02 */
1053         u8 reserved_1[5];
1054         u8 phy_identifier;
1055         u8 reserved_2[2];
1056 };
1057
1058 /* report phy error log reply structure */
1059 struct phy_error_log_reply {
1060         u8 smp_frame_type; /* 0x41 */
1061         u8 function; /* 0x11 */
1062         u8 function_result;
1063         u8 response_length;
1064         __be16 expander_change_count;
1065         u8 reserved_1[3];
1066         u8 phy_identifier;
1067         u8 reserved_2[2];
1068         __be32 invalid_dword;
1069         __be32 running_disparity_error;
1070         __be32 loss_of_dword_sync;
1071         __be32 phy_reset_problem;
1072 };
1073
1074 /**
1075  * _transport_get_expander_phy_error_log - return expander counters
1076  * @ioc: per adapter object
1077  * @phy: The sas phy object
1078  *
1079  * Return: 0 for success, non-zero for failure.
1080  *
1081  */
1082 static int
1083 _transport_get_expander_phy_error_log(struct MPT3SAS_ADAPTER *ioc,
1084         struct sas_phy *phy)
1085 {
1086         Mpi2SmpPassthroughRequest_t *mpi_request;
1087         Mpi2SmpPassthroughReply_t *mpi_reply;
1088         struct phy_error_log_request *phy_error_log_request;
1089         struct phy_error_log_reply *phy_error_log_reply;
1090         int rc;
1091         u16 smid;
1092         u32 ioc_state;
1093         void *psge;
1094         u8 issue_reset = 0;
1095         void *data_out = NULL;
1096         dma_addr_t data_out_dma;
1097         u32 sz;
1098         u16 wait_state_count;
1099
1100         if (ioc->shost_recovery || ioc->pci_error_recovery) {
1101                 pr_info(MPT3SAS_FMT "%s: host reset in progress!\n",
1102                     __func__, ioc->name);
1103                 return -EFAULT;
1104         }
1105
1106         mutex_lock(&ioc->transport_cmds.mutex);
1107
1108         if (ioc->transport_cmds.status != MPT3_CMD_NOT_USED) {
1109                 pr_err(MPT3SAS_FMT "%s: transport_cmds in use\n",
1110                     ioc->name, __func__);
1111                 rc = -EAGAIN;
1112                 goto out;
1113         }
1114         ioc->transport_cmds.status = MPT3_CMD_PENDING;
1115
1116         wait_state_count = 0;
1117         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1118         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1119                 if (wait_state_count++ == 10) {
1120                         pr_err(MPT3SAS_FMT
1121                             "%s: failed due to ioc not operational\n",
1122                             ioc->name, __func__);
1123                         rc = -EFAULT;
1124                         goto out;
1125                 }
1126                 ssleep(1);
1127                 ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1128                 pr_info(MPT3SAS_FMT
1129                         "%s: waiting for operational state(count=%d)\n",
1130                         ioc->name, __func__, wait_state_count);
1131         }
1132         if (wait_state_count)
1133                 pr_info(MPT3SAS_FMT "%s: ioc is operational\n",
1134                     ioc->name, __func__);
1135
1136         smid = mpt3sas_base_get_smid(ioc, ioc->transport_cb_idx);
1137         if (!smid) {
1138                 pr_err(MPT3SAS_FMT "%s: failed obtaining a smid\n",
1139                     ioc->name, __func__);
1140                 rc = -EAGAIN;
1141                 goto out;
1142         }
1143
1144         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
1145         ioc->transport_cmds.smid = smid;
1146
1147         sz = sizeof(struct phy_error_log_request) +
1148             sizeof(struct phy_error_log_reply);
1149         data_out = pci_alloc_consistent(ioc->pdev, sz, &data_out_dma);
1150         if (!data_out) {
1151                 pr_err("failure at %s:%d/%s()!\n", __FILE__,
1152                     __LINE__, __func__);
1153                 rc = -ENOMEM;
1154                 mpt3sas_base_free_smid(ioc, smid);
1155                 goto out;
1156         }
1157
1158         rc = -EINVAL;
1159         memset(data_out, 0, sz);
1160         phy_error_log_request = data_out;
1161         phy_error_log_request->smp_frame_type = 0x40;
1162         phy_error_log_request->function = 0x11;
1163         phy_error_log_request->request_length = 2;
1164         phy_error_log_request->allocated_response_length = 0;
1165         phy_error_log_request->phy_identifier = phy->number;
1166
1167         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
1168         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
1169         mpi_request->PhysicalPort = 0xFF;
1170         mpi_request->VF_ID = 0; /* TODO */
1171         mpi_request->VP_ID = 0;
1172         mpi_request->SASAddress = cpu_to_le64(phy->identify.sas_address);
1173         mpi_request->RequestDataLength =
1174             cpu_to_le16(sizeof(struct phy_error_log_request));
1175         psge = &mpi_request->SGL;
1176
1177         ioc->build_sg(ioc, psge, data_out_dma,
1178                 sizeof(struct phy_error_log_request),
1179             data_out_dma + sizeof(struct phy_error_log_request),
1180             sizeof(struct phy_error_log_reply));
1181
1182         dtransportprintk(ioc, pr_info(MPT3SAS_FMT
1183                 "phy_error_log - send to sas_addr(0x%016llx), phy(%d)\n",
1184                 ioc->name, (unsigned long long)phy->identify.sas_address,
1185                 phy->number));
1186         init_completion(&ioc->transport_cmds.done);
1187         mpt3sas_base_put_smid_default(ioc, smid);
1188         wait_for_completion_timeout(&ioc->transport_cmds.done, 10*HZ);
1189
1190         if (!(ioc->transport_cmds.status & MPT3_CMD_COMPLETE)) {
1191                 pr_err(MPT3SAS_FMT "%s: timeout\n",
1192                     ioc->name, __func__);
1193                 _debug_dump_mf(mpi_request,
1194                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
1195                 if (!(ioc->transport_cmds.status & MPT3_CMD_RESET))
1196                         issue_reset = 1;
1197                 goto issue_host_reset;
1198         }
1199
1200         dtransportprintk(ioc, pr_info(MPT3SAS_FMT
1201                 "phy_error_log - complete\n", ioc->name));
1202
1203         if (ioc->transport_cmds.status & MPT3_CMD_REPLY_VALID) {
1204
1205                 mpi_reply = ioc->transport_cmds.reply;
1206
1207                 dtransportprintk(ioc, pr_info(MPT3SAS_FMT
1208                     "phy_error_log - reply data transfer size(%d)\n",
1209                     ioc->name, le16_to_cpu(mpi_reply->ResponseDataLength)));
1210
1211                 if (le16_to_cpu(mpi_reply->ResponseDataLength) !=
1212                     sizeof(struct phy_error_log_reply))
1213                         goto out;
1214
1215                 phy_error_log_reply = data_out +
1216                     sizeof(struct phy_error_log_request);
1217
1218                 dtransportprintk(ioc, pr_info(MPT3SAS_FMT
1219                     "phy_error_log - function_result(%d)\n",
1220                     ioc->name, phy_error_log_reply->function_result));
1221
1222                 phy->invalid_dword_count =
1223                     be32_to_cpu(phy_error_log_reply->invalid_dword);
1224                 phy->running_disparity_error_count =
1225                     be32_to_cpu(phy_error_log_reply->running_disparity_error);
1226                 phy->loss_of_dword_sync_count =
1227                     be32_to_cpu(phy_error_log_reply->loss_of_dword_sync);
1228                 phy->phy_reset_problem_count =
1229                     be32_to_cpu(phy_error_log_reply->phy_reset_problem);
1230                 rc = 0;
1231         } else
1232                 dtransportprintk(ioc, pr_info(MPT3SAS_FMT
1233                     "phy_error_log - no reply\n", ioc->name));
1234
1235  issue_host_reset:
1236         if (issue_reset)
1237                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1238  out:
1239         ioc->transport_cmds.status = MPT3_CMD_NOT_USED;
1240         if (data_out)
1241                 pci_free_consistent(ioc->pdev, sz, data_out, data_out_dma);
1242
1243         mutex_unlock(&ioc->transport_cmds.mutex);
1244         return rc;
1245 }
1246
1247 /**
1248  * _transport_get_linkerrors - return phy counters for both hba and expanders
1249  * @phy: The sas phy object
1250  *
1251  * Return: 0 for success, non-zero for failure.
1252  *
1253  */
1254 static int
1255 _transport_get_linkerrors(struct sas_phy *phy)
1256 {
1257         struct MPT3SAS_ADAPTER *ioc = phy_to_ioc(phy);
1258         unsigned long flags;
1259         Mpi2ConfigReply_t mpi_reply;
1260         Mpi2SasPhyPage1_t phy_pg1;
1261
1262         spin_lock_irqsave(&ioc->sas_node_lock, flags);
1263         if (_transport_sas_node_find_by_sas_address(ioc,
1264             phy->identify.sas_address) == NULL) {
1265                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1266                 return -EINVAL;
1267         }
1268         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1269
1270         if (phy->identify.sas_address != ioc->sas_hba.sas_address)
1271                 return _transport_get_expander_phy_error_log(ioc, phy);
1272
1273         /* get hba phy error logs */
1274         if ((mpt3sas_config_get_phy_pg1(ioc, &mpi_reply, &phy_pg1,
1275                     phy->number))) {
1276                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1277                     ioc->name, __FILE__, __LINE__, __func__);
1278                 return -ENXIO;
1279         }
1280
1281         if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo)
1282                 pr_info(MPT3SAS_FMT
1283                         "phy(%d), ioc_status (0x%04x), loginfo(0x%08x)\n",
1284                         ioc->name, phy->number,
1285                         le16_to_cpu(mpi_reply.IOCStatus),
1286                     le32_to_cpu(mpi_reply.IOCLogInfo));
1287
1288         phy->invalid_dword_count = le32_to_cpu(phy_pg1.InvalidDwordCount);
1289         phy->running_disparity_error_count =
1290             le32_to_cpu(phy_pg1.RunningDisparityErrorCount);
1291         phy->loss_of_dword_sync_count =
1292             le32_to_cpu(phy_pg1.LossDwordSynchCount);
1293         phy->phy_reset_problem_count =
1294             le32_to_cpu(phy_pg1.PhyResetProblemCount);
1295         return 0;
1296 }
1297
1298 /**
1299  * _transport_get_enclosure_identifier -
1300  * @rphy: The sas phy object
1301  * @identifier: ?
1302  *
1303  * Obtain the enclosure logical id for an expander.
1304  * Return: 0 for success, non-zero for failure.
1305  */
1306 static int
1307 _transport_get_enclosure_identifier(struct sas_rphy *rphy, u64 *identifier)
1308 {
1309         struct MPT3SAS_ADAPTER *ioc = rphy_to_ioc(rphy);
1310         struct _sas_device *sas_device;
1311         unsigned long flags;
1312         int rc;
1313
1314         spin_lock_irqsave(&ioc->sas_device_lock, flags);
1315         sas_device = __mpt3sas_get_sdev_by_addr(ioc,
1316             rphy->identify.sas_address);
1317         if (sas_device) {
1318                 *identifier = sas_device->enclosure_logical_id;
1319                 rc = 0;
1320                 sas_device_put(sas_device);
1321         } else {
1322                 *identifier = 0;
1323                 rc = -ENXIO;
1324         }
1325
1326         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1327         return rc;
1328 }
1329
1330 /**
1331  * _transport_get_bay_identifier -
1332  * @rphy: The sas phy object
1333  *
1334  * Return: the slot id for a device that resides inside an enclosure.
1335  */
1336 static int
1337 _transport_get_bay_identifier(struct sas_rphy *rphy)
1338 {
1339         struct MPT3SAS_ADAPTER *ioc = rphy_to_ioc(rphy);
1340         struct _sas_device *sas_device;
1341         unsigned long flags;
1342         int rc;
1343
1344         spin_lock_irqsave(&ioc->sas_device_lock, flags);
1345         sas_device = __mpt3sas_get_sdev_by_addr(ioc,
1346             rphy->identify.sas_address);
1347         if (sas_device) {
1348                 rc = sas_device->slot;
1349                 sas_device_put(sas_device);
1350         } else {
1351                 rc = -ENXIO;
1352         }
1353         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1354         return rc;
1355 }
1356
1357 /* phy control request structure */
1358 struct phy_control_request {
1359         u8 smp_frame_type; /* 0x40 */
1360         u8 function; /* 0x91 */
1361         u8 allocated_response_length;
1362         u8 request_length; /* 0x09 */
1363         u16 expander_change_count;
1364         u8 reserved_1[3];
1365         u8 phy_identifier;
1366         u8 phy_operation;
1367         u8 reserved_2[13];
1368         u64 attached_device_name;
1369         u8 programmed_min_physical_link_rate;
1370         u8 programmed_max_physical_link_rate;
1371         u8 reserved_3[6];
1372 };
1373
1374 /* phy control reply structure */
1375 struct phy_control_reply {
1376         u8 smp_frame_type; /* 0x41 */
1377         u8 function; /* 0x11 */
1378         u8 function_result;
1379         u8 response_length;
1380 };
1381
1382 #define SMP_PHY_CONTROL_LINK_RESET      (0x01)
1383 #define SMP_PHY_CONTROL_HARD_RESET      (0x02)
1384 #define SMP_PHY_CONTROL_DISABLE         (0x03)
1385
1386 /**
1387  * _transport_expander_phy_control - expander phy control
1388  * @ioc: per adapter object
1389  * @phy: The sas phy object
1390  * @phy_operation: ?
1391  *
1392  * Return: 0 for success, non-zero for failure.
1393  *
1394  */
1395 static int
1396 _transport_expander_phy_control(struct MPT3SAS_ADAPTER *ioc,
1397         struct sas_phy *phy, u8 phy_operation)
1398 {
1399         Mpi2SmpPassthroughRequest_t *mpi_request;
1400         Mpi2SmpPassthroughReply_t *mpi_reply;
1401         struct phy_control_request *phy_control_request;
1402         struct phy_control_reply *phy_control_reply;
1403         int rc;
1404         u16 smid;
1405         u32 ioc_state;
1406         void *psge;
1407         u8 issue_reset = 0;
1408         void *data_out = NULL;
1409         dma_addr_t data_out_dma;
1410         u32 sz;
1411         u16 wait_state_count;
1412
1413         if (ioc->shost_recovery || ioc->pci_error_recovery) {
1414                 pr_info(MPT3SAS_FMT "%s: host reset in progress!\n",
1415                     __func__, ioc->name);
1416                 return -EFAULT;
1417         }
1418
1419         mutex_lock(&ioc->transport_cmds.mutex);
1420
1421         if (ioc->transport_cmds.status != MPT3_CMD_NOT_USED) {
1422                 pr_err(MPT3SAS_FMT "%s: transport_cmds in use\n",
1423                     ioc->name, __func__);
1424                 rc = -EAGAIN;
1425                 goto out;
1426         }
1427         ioc->transport_cmds.status = MPT3_CMD_PENDING;
1428
1429         wait_state_count = 0;
1430         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1431         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1432                 if (wait_state_count++ == 10) {
1433                         pr_err(MPT3SAS_FMT
1434                             "%s: failed due to ioc not operational\n",
1435                             ioc->name, __func__);
1436                         rc = -EFAULT;
1437                         goto out;
1438                 }
1439                 ssleep(1);
1440                 ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1441                 pr_info(MPT3SAS_FMT
1442                         "%s: waiting for operational state(count=%d)\n",
1443                         ioc->name, __func__, wait_state_count);
1444         }
1445         if (wait_state_count)
1446                 pr_info(MPT3SAS_FMT "%s: ioc is operational\n",
1447                     ioc->name, __func__);
1448
1449         smid = mpt3sas_base_get_smid(ioc, ioc->transport_cb_idx);
1450         if (!smid) {
1451                 pr_err(MPT3SAS_FMT "%s: failed obtaining a smid\n",
1452                     ioc->name, __func__);
1453                 rc = -EAGAIN;
1454                 goto out;
1455         }
1456
1457         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
1458         ioc->transport_cmds.smid = smid;
1459
1460         sz = sizeof(struct phy_control_request) +
1461             sizeof(struct phy_control_reply);
1462         data_out = pci_alloc_consistent(ioc->pdev, sz, &data_out_dma);
1463         if (!data_out) {
1464                 pr_err("failure at %s:%d/%s()!\n", __FILE__,
1465                     __LINE__, __func__);
1466                 rc = -ENOMEM;
1467                 mpt3sas_base_free_smid(ioc, smid);
1468                 goto out;
1469         }
1470
1471         rc = -EINVAL;
1472         memset(data_out, 0, sz);
1473         phy_control_request = data_out;
1474         phy_control_request->smp_frame_type = 0x40;
1475         phy_control_request->function = 0x91;
1476         phy_control_request->request_length = 9;
1477         phy_control_request->allocated_response_length = 0;
1478         phy_control_request->phy_identifier = phy->number;
1479         phy_control_request->phy_operation = phy_operation;
1480         phy_control_request->programmed_min_physical_link_rate =
1481             phy->minimum_linkrate << 4;
1482         phy_control_request->programmed_max_physical_link_rate =
1483             phy->maximum_linkrate << 4;
1484
1485         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
1486         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
1487         mpi_request->PhysicalPort = 0xFF;
1488         mpi_request->VF_ID = 0; /* TODO */
1489         mpi_request->VP_ID = 0;
1490         mpi_request->SASAddress = cpu_to_le64(phy->identify.sas_address);
1491         mpi_request->RequestDataLength =
1492             cpu_to_le16(sizeof(struct phy_error_log_request));
1493         psge = &mpi_request->SGL;
1494
1495         ioc->build_sg(ioc, psge, data_out_dma,
1496                             sizeof(struct phy_control_request),
1497             data_out_dma + sizeof(struct phy_control_request),
1498             sizeof(struct phy_control_reply));
1499
1500         dtransportprintk(ioc, pr_info(MPT3SAS_FMT
1501                 "phy_control - send to sas_addr(0x%016llx), phy(%d), opcode(%d)\n",
1502                 ioc->name, (unsigned long long)phy->identify.sas_address,
1503                 phy->number, phy_operation));
1504         init_completion(&ioc->transport_cmds.done);
1505         mpt3sas_base_put_smid_default(ioc, smid);
1506         wait_for_completion_timeout(&ioc->transport_cmds.done, 10*HZ);
1507
1508         if (!(ioc->transport_cmds.status & MPT3_CMD_COMPLETE)) {
1509                 pr_err(MPT3SAS_FMT "%s: timeout\n",
1510                     ioc->name, __func__);
1511                 _debug_dump_mf(mpi_request,
1512                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
1513                 if (!(ioc->transport_cmds.status & MPT3_CMD_RESET))
1514                         issue_reset = 1;
1515                 goto issue_host_reset;
1516         }
1517
1518         dtransportprintk(ioc, pr_info(MPT3SAS_FMT
1519                 "phy_control - complete\n", ioc->name));
1520
1521         if (ioc->transport_cmds.status & MPT3_CMD_REPLY_VALID) {
1522
1523                 mpi_reply = ioc->transport_cmds.reply;
1524
1525                 dtransportprintk(ioc, pr_info(MPT3SAS_FMT
1526                     "phy_control - reply data transfer size(%d)\n",
1527                     ioc->name, le16_to_cpu(mpi_reply->ResponseDataLength)));
1528
1529                 if (le16_to_cpu(mpi_reply->ResponseDataLength) !=
1530                     sizeof(struct phy_control_reply))
1531                         goto out;
1532
1533                 phy_control_reply = data_out +
1534                     sizeof(struct phy_control_request);
1535
1536                 dtransportprintk(ioc, pr_info(MPT3SAS_FMT
1537                     "phy_control - function_result(%d)\n",
1538                     ioc->name, phy_control_reply->function_result));
1539
1540                 rc = 0;
1541         } else
1542                 dtransportprintk(ioc, pr_info(MPT3SAS_FMT
1543                     "phy_control - no reply\n", ioc->name));
1544
1545  issue_host_reset:
1546         if (issue_reset)
1547                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1548  out:
1549         ioc->transport_cmds.status = MPT3_CMD_NOT_USED;
1550         if (data_out)
1551                 pci_free_consistent(ioc->pdev, sz, data_out, data_out_dma);
1552
1553         mutex_unlock(&ioc->transport_cmds.mutex);
1554         return rc;
1555 }
1556
1557 /**
1558  * _transport_phy_reset -
1559  * @phy: The sas phy object
1560  * @hard_reset:
1561  *
1562  * Return: 0 for success, non-zero for failure.
1563  */
1564 static int
1565 _transport_phy_reset(struct sas_phy *phy, int hard_reset)
1566 {
1567         struct MPT3SAS_ADAPTER *ioc = phy_to_ioc(phy);
1568         Mpi2SasIoUnitControlReply_t mpi_reply;
1569         Mpi2SasIoUnitControlRequest_t mpi_request;
1570         unsigned long flags;
1571
1572         spin_lock_irqsave(&ioc->sas_node_lock, flags);
1573         if (_transport_sas_node_find_by_sas_address(ioc,
1574             phy->identify.sas_address) == NULL) {
1575                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1576                 return -EINVAL;
1577         }
1578         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1579
1580         /* handle expander phys */
1581         if (phy->identify.sas_address != ioc->sas_hba.sas_address)
1582                 return _transport_expander_phy_control(ioc, phy,
1583                     (hard_reset == 1) ? SMP_PHY_CONTROL_HARD_RESET :
1584                     SMP_PHY_CONTROL_LINK_RESET);
1585
1586         /* handle hba phys */
1587         memset(&mpi_request, 0, sizeof(Mpi2SasIoUnitControlRequest_t));
1588         mpi_request.Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
1589         mpi_request.Operation = hard_reset ?
1590             MPI2_SAS_OP_PHY_HARD_RESET : MPI2_SAS_OP_PHY_LINK_RESET;
1591         mpi_request.PhyNum = phy->number;
1592
1593         if ((mpt3sas_base_sas_iounit_control(ioc, &mpi_reply, &mpi_request))) {
1594                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1595                     ioc->name, __FILE__, __LINE__, __func__);
1596                 return -ENXIO;
1597         }
1598
1599         if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo)
1600                 pr_info(MPT3SAS_FMT
1601                 "phy(%d), ioc_status(0x%04x), loginfo(0x%08x)\n",
1602                 ioc->name, phy->number, le16_to_cpu(mpi_reply.IOCStatus),
1603                     le32_to_cpu(mpi_reply.IOCLogInfo));
1604
1605         return 0;
1606 }
1607
1608 /**
1609  * _transport_phy_enable - enable/disable phys
1610  * @phy: The sas phy object
1611  * @enable: enable phy when true
1612  *
1613  * Only support sas_host direct attached phys.
1614  * Return: 0 for success, non-zero for failure.
1615  */
1616 static int
1617 _transport_phy_enable(struct sas_phy *phy, int enable)
1618 {
1619         struct MPT3SAS_ADAPTER *ioc = phy_to_ioc(phy);
1620         Mpi2SasIOUnitPage1_t *sas_iounit_pg1 = NULL;
1621         Mpi2SasIOUnitPage0_t *sas_iounit_pg0 = NULL;
1622         Mpi2ConfigReply_t mpi_reply;
1623         u16 ioc_status;
1624         u16 sz;
1625         int rc = 0;
1626         unsigned long flags;
1627         int i, discovery_active;
1628
1629         spin_lock_irqsave(&ioc->sas_node_lock, flags);
1630         if (_transport_sas_node_find_by_sas_address(ioc,
1631             phy->identify.sas_address) == NULL) {
1632                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1633                 return -EINVAL;
1634         }
1635         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1636
1637         /* handle expander phys */
1638         if (phy->identify.sas_address != ioc->sas_hba.sas_address)
1639                 return _transport_expander_phy_control(ioc, phy,
1640                     (enable == 1) ? SMP_PHY_CONTROL_LINK_RESET :
1641                     SMP_PHY_CONTROL_DISABLE);
1642
1643         /* handle hba phys */
1644
1645         /* read sas_iounit page 0 */
1646         sz = offsetof(Mpi2SasIOUnitPage0_t, PhyData) + (ioc->sas_hba.num_phys *
1647             sizeof(Mpi2SasIOUnit0PhyData_t));
1648         sas_iounit_pg0 = kzalloc(sz, GFP_KERNEL);
1649         if (!sas_iounit_pg0) {
1650                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1651                     ioc->name, __FILE__, __LINE__, __func__);
1652                 rc = -ENOMEM;
1653                 goto out;
1654         }
1655         if ((mpt3sas_config_get_sas_iounit_pg0(ioc, &mpi_reply,
1656             sas_iounit_pg0, sz))) {
1657                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1658                     ioc->name, __FILE__, __LINE__, __func__);
1659                 rc = -ENXIO;
1660                 goto out;
1661         }
1662         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
1663             MPI2_IOCSTATUS_MASK;
1664         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
1665                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1666                     ioc->name, __FILE__, __LINE__, __func__);
1667                 rc = -EIO;
1668                 goto out;
1669         }
1670
1671         /* unable to enable/disable phys when when discovery is active */
1672         for (i = 0, discovery_active = 0; i < ioc->sas_hba.num_phys ; i++) {
1673                 if (sas_iounit_pg0->PhyData[i].PortFlags &
1674                     MPI2_SASIOUNIT0_PORTFLAGS_DISCOVERY_IN_PROGRESS) {
1675                         pr_err(MPT3SAS_FMT "discovery is active on " \
1676                             "port = %d, phy = %d: unable to enable/disable "
1677                             "phys, try again later!\n", ioc->name,
1678                             sas_iounit_pg0->PhyData[i].Port, i);
1679                         discovery_active = 1;
1680                 }
1681         }
1682
1683         if (discovery_active) {
1684                 rc = -EAGAIN;
1685                 goto out;
1686         }
1687
1688         /* read sas_iounit page 1 */
1689         sz = offsetof(Mpi2SasIOUnitPage1_t, PhyData) + (ioc->sas_hba.num_phys *
1690             sizeof(Mpi2SasIOUnit1PhyData_t));
1691         sas_iounit_pg1 = kzalloc(sz, GFP_KERNEL);
1692         if (!sas_iounit_pg1) {
1693                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1694                     ioc->name, __FILE__, __LINE__, __func__);
1695                 rc = -ENOMEM;
1696                 goto out;
1697         }
1698         if ((mpt3sas_config_get_sas_iounit_pg1(ioc, &mpi_reply,
1699             sas_iounit_pg1, sz))) {
1700                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1701                     ioc->name, __FILE__, __LINE__, __func__);
1702                 rc = -ENXIO;
1703                 goto out;
1704         }
1705         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
1706             MPI2_IOCSTATUS_MASK;
1707         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
1708                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1709                     ioc->name, __FILE__, __LINE__, __func__);
1710                 rc = -EIO;
1711                 goto out;
1712         }
1713
1714         /* copy Port/PortFlags/PhyFlags from page 0 */
1715         for (i = 0; i < ioc->sas_hba.num_phys ; i++) {
1716                 sas_iounit_pg1->PhyData[i].Port =
1717                     sas_iounit_pg0->PhyData[i].Port;
1718                 sas_iounit_pg1->PhyData[i].PortFlags =
1719                     (sas_iounit_pg0->PhyData[i].PortFlags &
1720                     MPI2_SASIOUNIT0_PORTFLAGS_AUTO_PORT_CONFIG);
1721                 sas_iounit_pg1->PhyData[i].PhyFlags =
1722                     (sas_iounit_pg0->PhyData[i].PhyFlags &
1723                     (MPI2_SASIOUNIT0_PHYFLAGS_ZONING_ENABLED +
1724                     MPI2_SASIOUNIT0_PHYFLAGS_PHY_DISABLED));
1725         }
1726
1727         if (enable)
1728                 sas_iounit_pg1->PhyData[phy->number].PhyFlags
1729                     &= ~MPI2_SASIOUNIT1_PHYFLAGS_PHY_DISABLE;
1730         else
1731                 sas_iounit_pg1->PhyData[phy->number].PhyFlags
1732                     |= MPI2_SASIOUNIT1_PHYFLAGS_PHY_DISABLE;
1733
1734         mpt3sas_config_set_sas_iounit_pg1(ioc, &mpi_reply, sas_iounit_pg1, sz);
1735
1736         /* link reset */
1737         if (enable)
1738                 _transport_phy_reset(phy, 0);
1739
1740  out:
1741         kfree(sas_iounit_pg1);
1742         kfree(sas_iounit_pg0);
1743         return rc;
1744 }
1745
1746 /**
1747  * _transport_phy_speed - set phy min/max link rates
1748  * @phy: The sas phy object
1749  * @rates: rates defined in sas_phy_linkrates
1750  *
1751  * Only support sas_host direct attached phys.
1752  *
1753  * Return: 0 for success, non-zero for failure.
1754  */
1755 static int
1756 _transport_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates)
1757 {
1758         struct MPT3SAS_ADAPTER *ioc = phy_to_ioc(phy);
1759         Mpi2SasIOUnitPage1_t *sas_iounit_pg1 = NULL;
1760         Mpi2SasPhyPage0_t phy_pg0;
1761         Mpi2ConfigReply_t mpi_reply;
1762         u16 ioc_status;
1763         u16 sz;
1764         int i;
1765         int rc = 0;
1766         unsigned long flags;
1767
1768         spin_lock_irqsave(&ioc->sas_node_lock, flags);
1769         if (_transport_sas_node_find_by_sas_address(ioc,
1770             phy->identify.sas_address) == NULL) {
1771                 spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1772                 return -EINVAL;
1773         }
1774         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
1775
1776         if (!rates->minimum_linkrate)
1777                 rates->minimum_linkrate = phy->minimum_linkrate;
1778         else if (rates->minimum_linkrate < phy->minimum_linkrate_hw)
1779                 rates->minimum_linkrate = phy->minimum_linkrate_hw;
1780
1781         if (!rates->maximum_linkrate)
1782                 rates->maximum_linkrate = phy->maximum_linkrate;
1783         else if (rates->maximum_linkrate > phy->maximum_linkrate_hw)
1784                 rates->maximum_linkrate = phy->maximum_linkrate_hw;
1785
1786         /* handle expander phys */
1787         if (phy->identify.sas_address != ioc->sas_hba.sas_address) {
1788                 phy->minimum_linkrate = rates->minimum_linkrate;
1789                 phy->maximum_linkrate = rates->maximum_linkrate;
1790                 return _transport_expander_phy_control(ioc, phy,
1791                     SMP_PHY_CONTROL_LINK_RESET);
1792         }
1793
1794         /* handle hba phys */
1795
1796         /* sas_iounit page 1 */
1797         sz = offsetof(Mpi2SasIOUnitPage1_t, PhyData) + (ioc->sas_hba.num_phys *
1798             sizeof(Mpi2SasIOUnit1PhyData_t));
1799         sas_iounit_pg1 = kzalloc(sz, GFP_KERNEL);
1800         if (!sas_iounit_pg1) {
1801                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1802                     ioc->name, __FILE__, __LINE__, __func__);
1803                 rc = -ENOMEM;
1804                 goto out;
1805         }
1806         if ((mpt3sas_config_get_sas_iounit_pg1(ioc, &mpi_reply,
1807             sas_iounit_pg1, sz))) {
1808                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1809                     ioc->name, __FILE__, __LINE__, __func__);
1810                 rc = -ENXIO;
1811                 goto out;
1812         }
1813         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
1814             MPI2_IOCSTATUS_MASK;
1815         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
1816                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1817                     ioc->name, __FILE__, __LINE__, __func__);
1818                 rc = -EIO;
1819                 goto out;
1820         }
1821
1822         for (i = 0; i < ioc->sas_hba.num_phys; i++) {
1823                 if (phy->number != i) {
1824                         sas_iounit_pg1->PhyData[i].MaxMinLinkRate =
1825                             (ioc->sas_hba.phy[i].phy->minimum_linkrate +
1826                             (ioc->sas_hba.phy[i].phy->maximum_linkrate << 4));
1827                 } else {
1828                         sas_iounit_pg1->PhyData[i].MaxMinLinkRate =
1829                             (rates->minimum_linkrate +
1830                             (rates->maximum_linkrate << 4));
1831                 }
1832         }
1833
1834         if (mpt3sas_config_set_sas_iounit_pg1(ioc, &mpi_reply, sas_iounit_pg1,
1835             sz)) {
1836                 pr_err(MPT3SAS_FMT "failure at %s:%d/%s()!\n",
1837                     ioc->name, __FILE__, __LINE__, __func__);
1838                 rc = -ENXIO;
1839                 goto out;
1840         }
1841
1842         /* link reset */
1843         _transport_phy_reset(phy, 0);
1844
1845         /* read phy page 0, then update the rates in the sas transport phy */
1846         if (!mpt3sas_config_get_phy_pg0(ioc, &mpi_reply, &phy_pg0,
1847             phy->number)) {
1848                 phy->minimum_linkrate = _transport_convert_phy_link_rate(
1849                     phy_pg0.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
1850                 phy->maximum_linkrate = _transport_convert_phy_link_rate(
1851                     phy_pg0.ProgrammedLinkRate >> 4);
1852                 phy->negotiated_linkrate = _transport_convert_phy_link_rate(
1853                     phy_pg0.NegotiatedLinkRate &
1854                     MPI2_SAS_NEG_LINK_RATE_MASK_PHYSICAL);
1855         }
1856
1857  out:
1858         kfree(sas_iounit_pg1);
1859         return rc;
1860 }
1861
1862 static int
1863 _transport_map_smp_buffer(struct device *dev, struct bsg_buffer *buf,
1864                 dma_addr_t *dma_addr, size_t *dma_len, void **p)
1865 {
1866         /* Check if the request is split across multiple segments */
1867         if (buf->sg_cnt > 1) {
1868                 *p = dma_alloc_coherent(dev, buf->payload_len, dma_addr,
1869                                 GFP_KERNEL);
1870                 if (!*p)
1871                         return -ENOMEM;
1872                 *dma_len = buf->payload_len;
1873         } else {
1874                 if (!dma_map_sg(dev, buf->sg_list, 1, DMA_BIDIRECTIONAL))
1875                         return -ENOMEM;
1876                 *dma_addr = sg_dma_address(buf->sg_list);
1877                 *dma_len = sg_dma_len(buf->sg_list);
1878                 *p = NULL;
1879         }
1880
1881         return 0;
1882 }
1883
1884 static void
1885 _transport_unmap_smp_buffer(struct device *dev, struct bsg_buffer *buf,
1886                 dma_addr_t dma_addr, void *p)
1887 {
1888         if (p)
1889                 dma_free_coherent(dev, buf->payload_len, p, dma_addr);
1890         else
1891                 dma_unmap_sg(dev, buf->sg_list, 1, DMA_BIDIRECTIONAL);
1892 }
1893
1894 /**
1895  * _transport_smp_handler - transport portal for smp passthru
1896  * @job: ?
1897  * @shost: shost object
1898  * @rphy: sas transport rphy object
1899  *
1900  * This used primarily for smp_utils.
1901  * Example:
1902  *           smp_rep_general /sys/class/bsg/expander-5:0
1903  */
1904 static void
1905 _transport_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
1906                 struct sas_rphy *rphy)
1907 {
1908         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
1909         Mpi2SmpPassthroughRequest_t *mpi_request;
1910         Mpi2SmpPassthroughReply_t *mpi_reply;
1911         int rc;
1912         u16 smid;
1913         u32 ioc_state;
1914         void *psge;
1915         dma_addr_t dma_addr_in;
1916         dma_addr_t dma_addr_out;
1917         void *addr_in = NULL;
1918         void *addr_out = NULL;
1919         size_t dma_len_in;
1920         size_t dma_len_out;
1921         u16 wait_state_count;
1922         unsigned int reslen = 0;
1923
1924         if (ioc->shost_recovery || ioc->pci_error_recovery) {
1925                 pr_info(MPT3SAS_FMT "%s: host reset in progress!\n",
1926                     __func__, ioc->name);
1927                 rc = -EFAULT;
1928                 goto job_done;
1929         }
1930
1931         rc = mutex_lock_interruptible(&ioc->transport_cmds.mutex);
1932         if (rc)
1933                 goto job_done;
1934
1935         if (ioc->transport_cmds.status != MPT3_CMD_NOT_USED) {
1936                 pr_err(MPT3SAS_FMT "%s: transport_cmds in use\n", ioc->name,
1937                     __func__);
1938                 rc = -EAGAIN;
1939                 goto out;
1940         }
1941         ioc->transport_cmds.status = MPT3_CMD_PENDING;
1942
1943         rc = _transport_map_smp_buffer(&ioc->pdev->dev, &job->request_payload,
1944                         &dma_addr_out, &dma_len_out, &addr_out);
1945         if (rc)
1946                 goto out;
1947         if (addr_out) {
1948                 sg_copy_to_buffer(job->request_payload.sg_list,
1949                                 job->request_payload.sg_cnt, addr_out,
1950                                 job->request_payload.payload_len);
1951         }
1952
1953         rc = _transport_map_smp_buffer(&ioc->pdev->dev, &job->reply_payload,
1954                         &dma_addr_in, &dma_len_in, &addr_in);
1955         if (rc)
1956                 goto unmap_out;
1957
1958         wait_state_count = 0;
1959         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1960         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1961                 if (wait_state_count++ == 10) {
1962                         pr_err(MPT3SAS_FMT
1963                             "%s: failed due to ioc not operational\n",
1964                             ioc->name, __func__);
1965                         rc = -EFAULT;
1966                         goto unmap_in;
1967                 }
1968                 ssleep(1);
1969                 ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1970                 pr_info(MPT3SAS_FMT
1971                         "%s: waiting for operational state(count=%d)\n",
1972                         ioc->name, __func__, wait_state_count);
1973         }
1974         if (wait_state_count)
1975                 pr_info(MPT3SAS_FMT "%s: ioc is operational\n",
1976                     ioc->name, __func__);
1977
1978         smid = mpt3sas_base_get_smid(ioc, ioc->transport_cb_idx);
1979         if (!smid) {
1980                 pr_err(MPT3SAS_FMT "%s: failed obtaining a smid\n",
1981                     ioc->name, __func__);
1982                 rc = -EAGAIN;
1983                 goto unmap_in;
1984         }
1985
1986         rc = 0;
1987         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
1988         ioc->transport_cmds.smid = smid;
1989
1990         memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
1991         mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
1992         mpi_request->PhysicalPort = 0xFF;
1993         mpi_request->SASAddress = (rphy) ?
1994             cpu_to_le64(rphy->identify.sas_address) :
1995             cpu_to_le64(ioc->sas_hba.sas_address);
1996         mpi_request->RequestDataLength = cpu_to_le16(dma_len_out - 4);
1997         psge = &mpi_request->SGL;
1998
1999         ioc->build_sg(ioc, psge, dma_addr_out, dma_len_out - 4, dma_addr_in,
2000                         dma_len_in - 4);
2001
2002         dtransportprintk(ioc, pr_info(MPT3SAS_FMT
2003                 "%s - sending smp request\n", ioc->name, __func__));
2004
2005         init_completion(&ioc->transport_cmds.done);
2006         mpt3sas_base_put_smid_default(ioc, smid);
2007         wait_for_completion_timeout(&ioc->transport_cmds.done, 10*HZ);
2008
2009         if (!(ioc->transport_cmds.status & MPT3_CMD_COMPLETE)) {
2010                 pr_err(MPT3SAS_FMT "%s : timeout\n",
2011                     __func__, ioc->name);
2012                 _debug_dump_mf(mpi_request,
2013                     sizeof(Mpi2SmpPassthroughRequest_t)/4);
2014                 if (!(ioc->transport_cmds.status & MPT3_CMD_RESET)) {
2015                         mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
2016                         rc = -ETIMEDOUT;
2017                         goto unmap_in;
2018                 }
2019         }
2020
2021         dtransportprintk(ioc, pr_info(MPT3SAS_FMT
2022                 "%s - complete\n", ioc->name, __func__));
2023
2024         if (!(ioc->transport_cmds.status & MPT3_CMD_REPLY_VALID)) {
2025                 dtransportprintk(ioc, pr_info(MPT3SAS_FMT
2026                     "%s - no reply\n", ioc->name, __func__));
2027                 rc = -ENXIO;
2028                 goto unmap_in;
2029         }
2030
2031         mpi_reply = ioc->transport_cmds.reply;
2032
2033         dtransportprintk(ioc,
2034                 pr_info(MPT3SAS_FMT "%s - reply data transfer size(%d)\n",
2035                         ioc->name, __func__,
2036                         le16_to_cpu(mpi_reply->ResponseDataLength)));
2037
2038         memcpy(job->reply, mpi_reply, sizeof(*mpi_reply));
2039         job->reply_len = sizeof(*mpi_reply);
2040         reslen = le16_to_cpu(mpi_reply->ResponseDataLength);
2041
2042         if (addr_in) {
2043                 sg_copy_to_buffer(job->reply_payload.sg_list,
2044                                 job->reply_payload.sg_cnt, addr_in,
2045                                 job->reply_payload.payload_len);
2046         }
2047
2048         rc = 0;
2049  unmap_in:
2050         _transport_unmap_smp_buffer(&ioc->pdev->dev, &job->reply_payload,
2051                         dma_addr_in, addr_in);
2052  unmap_out:
2053         _transport_unmap_smp_buffer(&ioc->pdev->dev, &job->request_payload,
2054                         dma_addr_out, addr_out);
2055  out:
2056         ioc->transport_cmds.status = MPT3_CMD_NOT_USED;
2057         mutex_unlock(&ioc->transport_cmds.mutex);
2058 job_done:
2059         bsg_job_done(job, rc, reslen);
2060 }
2061
2062 struct sas_function_template mpt3sas_transport_functions = {
2063         .get_linkerrors         = _transport_get_linkerrors,
2064         .get_enclosure_identifier = _transport_get_enclosure_identifier,
2065         .get_bay_identifier     = _transport_get_bay_identifier,
2066         .phy_reset              = _transport_phy_reset,
2067         .phy_enable             = _transport_phy_enable,
2068         .set_phy_speed          = _transport_phy_speed,
2069         .smp_handler            = _transport_smp_handler,
2070 };
2071
2072 struct scsi_transport_template *mpt3sas_transport_template;