drivers/misc/mei/hbm.c

   1 /*
   2  *
   3  * Intel Management Engine Interface (Intel MEI) Linux driver
   4  * Copyright (c) 2003-2012, Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  */
  16
  17 #include <linux/pci.h>
  18 #include <linux/sched.h>
  19 #include <linux/wait.h>
  20 #include <linux/mei.h>
  21
  22 #include "mei_dev.h"
  23 #include "hbm.h"
  24 #include "hw-me.h"
  25
  26 /**
  27  * mei_hbm_me_cl_allocate - allocates storage for me clients
  28  *
  29  * @dev: the device structure
  30  *
  31  * returns none.
  32  */
  33 static void mei_hbm_me_cl_allocate(struct mei_device *dev)
  34 {
  35         struct mei_me_client *clients;
  36         int b;
  37
  38         /* count how many ME clients we have */
  39         for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX)
  40                 dev->me_clients_num++;
  41
  42         if (dev->me_clients_num <= 0)
  43                 return;
  44
  45         kfree(dev->me_clients);
  46         dev->me_clients = NULL;
  47
  48         dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%zd.\n",
  49                 dev->me_clients_num * sizeof(struct mei_me_client));
  50         /* allocate storage for ME clients representation */
  51         clients = kcalloc(dev->me_clients_num,
  52                         sizeof(struct mei_me_client), GFP_KERNEL);
  53         if (!clients) {
  54                 dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n");
  55                 dev->dev_state = MEI_DEV_RESETTING;
  56                 mei_reset(dev, 1);
  57                 return;
  58         }
  59         dev->me_clients = clients;
  60         return;
  61 }
  62
  63 /**
  64  * mei_hbm_cl_hdr - construct client hbm header
  65  * @cl: - client
  66  * @hbm_cmd: host bus message command
  67  * @buf: buffer for cl header
  68  * @len: buffer length
  69  */
  70 static inline
  71 void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len)
  72 {
  73         struct mei_hbm_cl_cmd *cmd = buf;
  74
  75         memset(cmd, 0, len);
  76
  77         cmd->hbm_cmd = hbm_cmd;
  78         cmd->host_addr = cl->host_client_id;
  79         cmd->me_addr = cl->me_client_id;
  80 }
  81
  82 /**
  83  * same_disconn_addr - tells if they have the same address
  84  *
  85  * @file: private data of the file object.
  86  * @disconn: disconnection request.
  87  *
  88  * returns true if addres are same
  89  */
  90 static inline
  91 bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf)
  92 {
  93         struct mei_hbm_cl_cmd *cmd = buf;
  94         return cl->host_client_id == cmd->host_addr &&
  95                 cl->me_client_id == cmd->me_addr;
  96 }
  97
  98
  99 /**
 100  * is_treat_specially_client - checks if the message belongs
 101  * to the file private data.
 102  *
 103  * @cl: private data of the file object
 104  * @rs: connect response bus message
 105  *
 106  */
 107 static bool is_treat_specially_client(struct mei_cl *cl,
 108                 struct hbm_client_connect_response *rs)
 109 {
 110         if (mei_hbm_cl_addr_equal(cl, rs)) {
 111                 if (!rs->status) {
 112                         cl->state = MEI_FILE_CONNECTED;
 113                         cl->status = 0;
 114
 115                 } else {
 116                         cl->state = MEI_FILE_DISCONNECTED;
 117                         cl->status = -ENODEV;
 118                 }
 119                 cl->timer_count = 0;
 120
 121                 return true;
 122         }
 123         return false;
 124 }
 125
 126 int mei_hbm_start_wait(struct mei_device *dev)
 127 {
 128         int ret;
 129         if (dev->hbm_state > MEI_HBM_START)
 130                 return 0;
 131
 132         mutex_unlock(&dev->device_lock);
 133         ret = wait_event_interruptible_timeout(dev->wait_recvd_msg,
 134                         dev->hbm_state == MEI_HBM_IDLE ||
 135                         dev->hbm_state > MEI_HBM_START,
 136                         mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT));
 137         mutex_lock(&dev->device_lock);
 138
 139         if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) {
 140                 dev->hbm_state = MEI_HBM_IDLE;
 141                 dev_err(&dev->pdev->dev, "wating for mei start failed\n");
 142                 return -ETIMEDOUT;
 143         }
 144         return 0;
 145 }
 146
 147 /**
 148  * mei_hbm_start_req - sends start request message.
 149  *
 150  * @dev: the device structure
 151  */
 152 int mei_hbm_start_req(struct mei_device *dev)
 153 {
 154         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 155         struct hbm_host_version_request *start_req;
 156         const size_t len = sizeof(struct hbm_host_version_request);
 157
 158         mei_hbm_hdr(mei_hdr, len);
 159
 160         /* host start message */
 161         start_req = (struct hbm_host_version_request *)dev->wr_msg.data;
 162         memset(start_req, 0, len);
 163         start_req->hbm_cmd = HOST_START_REQ_CMD;
 164         start_req->host_version.major_version = HBM_MAJOR_VERSION;
 165         start_req->host_version.minor_version = HBM_MINOR_VERSION;
 166
 167         dev->hbm_state = MEI_HBM_IDLE;
 168         if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
 169                 dev_err(&dev->pdev->dev, "version message writet failed\n");
 170                 dev->dev_state = MEI_DEV_RESETTING;
 171                 mei_reset(dev, 1);
 172                 return -ENODEV;
 173         }
 174         dev->hbm_state = MEI_HBM_START;
 175         dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
 176         return 0;
 177 }
 178
 179 /*
 180  * mei_hbm_enum_clients_req - sends enumeration client request message.
 181  *
 182  * @dev: the device structure
 183  *
 184  * returns none.
 185  */
 186 static void mei_hbm_enum_clients_req(struct mei_device *dev)
 187 {
 188         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 189         struct hbm_host_enum_request *enum_req;
 190         const size_t len = sizeof(struct hbm_host_enum_request);
 191         /* enumerate clients */
 192         mei_hbm_hdr(mei_hdr, len);
 193
 194         enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data;
 195         memset(enum_req, 0, len);
 196         enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
 197
 198         if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
 199                 dev->dev_state = MEI_DEV_RESETTING;
 200                 dev_err(&dev->pdev->dev, "enumeration request write failed.\n");
 201                 mei_reset(dev, 1);
 202         }
 203         dev->hbm_state = MEI_HBM_ENUM_CLIENTS;
 204         dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
 205         return;
 206 }
 207
 208 /**
 209  * mei_hbm_prop_requsest - request property for a single client
 210  *
 211  * @dev: the device structure
 212  *
 213  * returns none.
 214  */
 215
 216 static int mei_hbm_prop_req(struct mei_device *dev)
 217 {
 218
 219         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 220         struct hbm_props_request *prop_req;
 221         const size_t len = sizeof(struct hbm_props_request);
 222         unsigned long next_client_index;
 223         u8 client_num;
 224
 225
 226         client_num = dev->me_client_presentation_num;
 227
 228         next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,
 229                                           dev->me_client_index);
 230
 231         /* We got all client properties */
 232         if (next_client_index == MEI_CLIENTS_MAX) {
 233                 dev->hbm_state = MEI_HBM_STARTED;
 234                 schedule_work(&dev->init_work);
 235
 236                 return 0;
 237         }
 238
 239         dev->me_clients[client_num].client_id = next_client_index;
 240         dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
 241
 242         mei_hbm_hdr(mei_hdr, len);
 243         prop_req = (struct hbm_props_request *)dev->wr_msg.data;
 244
 245         memset(prop_req, 0, sizeof(struct hbm_props_request));
 246
 247
 248         prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
 249         prop_req->address = next_client_index;
 250
 251         if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
 252                 dev->dev_state = MEI_DEV_RESETTING;
 253                 dev_err(&dev->pdev->dev, "properties request write failed\n");
 254                 mei_reset(dev, 1);
 255
 256                 return -EIO;
 257         }
 258
 259         dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
 260         dev->me_client_index = next_client_index;
 261
 262         return 0;
 263 }
 264
 265 /**
 266  * mei_hbm_stop_req_prepare - perpare stop request message
 267  *
 268  * @dev - mei device
 269  * @mei_hdr - mei message header
 270  * @data - hbm message body buffer
 271  */
 272 static void mei_hbm_stop_req_prepare(struct mei_device *dev,
 273                 struct mei_msg_hdr *mei_hdr, unsigned char *data)
 274 {
 275         struct hbm_host_stop_request *req =
 276                         (struct hbm_host_stop_request *)data;
 277         const size_t len = sizeof(struct hbm_host_stop_request);
 278
 279         mei_hbm_hdr(mei_hdr, len);
 280
 281         memset(req, 0, len);
 282         req->hbm_cmd = HOST_STOP_REQ_CMD;
 283         req->reason = DRIVER_STOP_REQUEST;
 284 }
 285
 286 /**
 287  * mei_hbm_cl_flow_control_req - sends flow control requst.
 288  *
 289  * @dev: the device structure
 290  * @cl: client info
 291  *
 292  * This function returns -EIO on write failure
 293  */
 294 int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
 295 {
 296         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 297         const size_t len = sizeof(struct hbm_flow_control);
 298
 299         mei_hbm_hdr(mei_hdr, len);
 300         mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len);
 301
 302         dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n",
 303                 cl->host_client_id, cl->me_client_id);
 304
 305         return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
 306 }
 307
 308 /**
 309  * add_single_flow_creds - adds single buffer credentials.
 310  *
 311  * @file: private data ot the file object.
 312  * @flow: flow control.
 313  */
 314 static void mei_hbm_add_single_flow_creds(struct mei_device *dev,
 315                                   struct hbm_flow_control *flow)
 316 {
 317         struct mei_me_client *client;
 318         int i;
 319
 320         for (i = 0; i < dev->me_clients_num; i++) {
 321                 client = &dev->me_clients[i];
 322                 if (client && flow->me_addr == client->client_id) {
 323                         if (client->props.single_recv_buf) {
 324                                 client->mei_flow_ctrl_creds++;
 325                                 dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
 326                                     flow->me_addr);
 327                                 dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
 328                                     client->mei_flow_ctrl_creds);
 329                         } else {
 330                                 BUG();  /* error in flow control */
 331                         }
 332                 }
 333         }
 334 }
 335
 336 /**
 337  * mei_hbm_cl_flow_control_res - flow control response from me
 338  *
 339  * @dev: the device structure
 340  * @flow_control: flow control response bus message
 341  */
 342 static void mei_hbm_cl_flow_control_res(struct mei_device *dev,
 343                 struct hbm_flow_control *flow_control)
 344 {
 345         struct mei_cl *cl = NULL;
 346         struct mei_cl *next = NULL;
 347
 348         if (!flow_control->host_addr) {
 349                 /* single receive buffer */
 350                 mei_hbm_add_single_flow_creds(dev, flow_control);
 351                 return;
 352         }
 353
 354         /* normal connection */
 355         list_for_each_entry_safe(cl, next, &dev->file_list, link) {
 356                 if (mei_hbm_cl_addr_equal(cl, flow_control)) {
 357                         cl->mei_flow_ctrl_creds++;
 358                         dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n",
 359                                 flow_control->host_addr, flow_control->me_addr);
 360                         dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n",
 361                                     cl->mei_flow_ctrl_creds);
 362                                 break;
 363                 }
 364         }
 365 }
 366
 367
 368 /**
 369  * mei_hbm_cl_disconnect_req - sends disconnect message to fw.
 370  *
 371  * @dev: the device structure
 372  * @cl: a client to disconnect from
 373  *
 374  * This function returns -EIO on write failure
 375  */
 376 int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
 377 {
 378         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 379         const size_t len = sizeof(struct hbm_client_connect_request);
 380
 381         mei_hbm_hdr(mei_hdr, len);
 382         mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, dev->wr_msg.data, len);
 383
 384         return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
 385 }
 386
 387 /**
 388  * mei_hbm_cl_disconnect_res - disconnect response from ME
 389  *
 390  * @dev: the device structure
 391  * @rs: disconnect response bus message
 392  */
 393 static void mei_hbm_cl_disconnect_res(struct mei_device *dev,
 394                 struct hbm_client_connect_response *rs)
 395 {
 396         struct mei_cl *cl;
 397         struct mei_cl_cb *pos = NULL, *next = NULL;
 398
 399         dev_dbg(&dev->pdev->dev,
 400                         "disconnect_response:\n"
 401                         "ME Client = %d\n"
 402                         "Host Client = %d\n"
 403                         "Status = %d\n",
 404                         rs->me_addr,
 405                         rs->host_addr,
 406                         rs->status);
 407
 408         list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
 409                 cl = pos->cl;
 410
 411                 if (!cl) {
 412                         list_del(&pos->list);
 413                         return;
 414                 }
 415
 416                 dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n");
 417                 if (mei_hbm_cl_addr_equal(cl, rs)) {
 418                         list_del(&pos->list);
 419                         if (!rs->status)
 420                                 cl->state = MEI_FILE_DISCONNECTED;
 421
 422                         cl->status = 0;
 423                         cl->timer_count = 0;
 424                         break;
 425                 }
 426         }
 427 }
 428
 429 /**
 430  * mei_hbm_cl_connect_req - send connection request to specific me client
 431  *
 432  * @dev: the device structure
 433  * @cl: a client to connect to
 434  *
 435  * returns -EIO on write failure
 436  */
 437 int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)
 438 {
 439         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 440         const size_t len = sizeof(struct hbm_client_connect_request);
 441
 442         mei_hbm_hdr(mei_hdr, len);
 443         mei_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, dev->wr_msg.data, len);
 444
 445         return mei_write_message(dev, mei_hdr,  dev->wr_msg.data);
 446 }
 447
 448 /**
 449  * mei_hbm_cl_connect_res - connect resposne from the ME
 450  *
 451  * @dev: the device structure
 452  * @rs: connect response bus message
 453  */
 454 static void mei_hbm_cl_connect_res(struct mei_device *dev,
 455                 struct hbm_client_connect_response *rs)
 456 {
 457
 458         struct mei_cl *cl;
 459         struct mei_cl_cb *pos = NULL, *next = NULL;
 460
 461         dev_dbg(&dev->pdev->dev,
 462                         "connect_response:\n"
 463                         "ME Client = %d\n"
 464                         "Host Client = %d\n"
 465                         "Status = %d\n",
 466                         rs->me_addr,
 467                         rs->host_addr,
 468                         rs->status);
 469
 470         /* if WD or iamthif client treat specially */
 471
 472         if (is_treat_specially_client(&dev->wd_cl, rs)) {
 473                 dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
 474                 mei_watchdog_register(dev);
 475
 476                 return;
 477         }
 478
 479         if (is_treat_specially_client(&dev->iamthif_cl, rs)) {
 480                 dev->iamthif_state = MEI_IAMTHIF_IDLE;
 481                 return;
 482         }
 483         list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
 484
 485                 cl = pos->cl;
 486                 if (!cl) {
 487                         list_del(&pos->list);
 488                         return;
 489                 }
 490                 if (pos->fop_type == MEI_FOP_IOCTL) {
 491                         if (is_treat_specially_client(cl, rs)) {
 492                                 list_del(&pos->list);
 493                                 cl->status = 0;
 494                                 cl->timer_count = 0;
 495                                 break;
 496                         }
 497                 }
 498         }
 499 }
 500
 501
 502 /**
 503  * mei_client_disconnect_request - disconnect request initiated by me
 504  *  host sends disoconnect response
 505  *
 506  * @dev: the device structure.
 507  * @disconnect_req: disconnect request bus message from the me
 508  */
 509 static void mei_hbm_fw_disconnect_req(struct mei_device *dev,
 510                 struct hbm_client_connect_request *disconnect_req)
 511 {
 512         struct mei_cl *cl, *next;
 513         const size_t len = sizeof(struct hbm_client_connect_response);
 514
 515         list_for_each_entry_safe(cl, next, &dev->file_list, link) {
 516                 if (mei_hbm_cl_addr_equal(cl, disconnect_req)) {
 517                         dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n",
 518                                         disconnect_req->host_addr,
 519                                         disconnect_req->me_addr);
 520                         cl->state = MEI_FILE_DISCONNECTED;
 521                         cl->timer_count = 0;
 522                         if (cl == &dev->wd_cl)
 523                                 dev->wd_pending = false;
 524                         else if (cl == &dev->iamthif_cl)
 525                                 dev->iamthif_timer = 0;
 526
 527                         /* prepare disconnect response */
 528                         mei_hbm_hdr(&dev->wr_ext_msg.hdr, len);
 529                         mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD,
 530                                          dev->wr_ext_msg.data, len);
 531                         break;
 532                 }
 533         }
 534 }
 535
 536
 537 /**
 538  * mei_hbm_dispatch - bottom half read routine after ISR to
 539  * handle the read bus message cmd processing.
 540  *
 541  * @dev: the device structure
 542  * @mei_hdr: header of bus message
 543  */
 544 void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
 545 {
 546         struct mei_bus_message *mei_msg;
 547         struct mei_me_client *me_client;
 548         struct hbm_host_version_response *version_res;
 549         struct hbm_client_connect_response *connect_res;
 550         struct hbm_client_connect_response *disconnect_res;
 551         struct hbm_client_connect_request *disconnect_req;
 552         struct hbm_flow_control *flow_control;
 553         struct hbm_props_response *props_res;
 554         struct hbm_host_enum_response *enum_res;
 555
 556         /* read the message to our buffer */
 557         BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));
 558         mei_read_slots(dev, dev->rd_msg_buf, hdr->length);
 559         mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
 560
 561         switch (mei_msg->hbm_cmd) {
 562         case HOST_START_RES_CMD:
 563                 version_res = (struct hbm_host_version_response *)mei_msg;
 564                 if (!version_res->host_version_supported) {
 565                         dev->version = version_res->me_max_version;
 566                         dev_dbg(&dev->pdev->dev, "version mismatch.\n");
 567
 568                         dev->hbm_state = MEI_HBM_STOP;
 569                         mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr,
 570                                                 dev->wr_msg.data);
 571                         mei_write_message(dev, &dev->wr_msg.hdr,
 572                                         dev->wr_msg.data);
 573
 574                         return;
 575                 }
 576
 577                 dev->version.major_version = HBM_MAJOR_VERSION;
 578                 dev->version.minor_version = HBM_MINOR_VERSION;
 579                 if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
 580                     dev->hbm_state == MEI_HBM_START) {
 581                         dev->init_clients_timer = 0;
 582                         mei_hbm_enum_clients_req(dev);
 583                 } else {
 584                         dev_err(&dev->pdev->dev, "reset: wrong host start response\n");
 585                         mei_reset(dev, 1);
 586                         return;
 587                 }
 588
 589                 wake_up_interruptible(&dev->wait_recvd_msg);
 590                 dev_dbg(&dev->pdev->dev, "host start response message received.\n");
 591                 break;
 592
 593         case CLIENT_CONNECT_RES_CMD:
 594                 connect_res = (struct hbm_client_connect_response *) mei_msg;
 595                 mei_hbm_cl_connect_res(dev, connect_res);
 596                 dev_dbg(&dev->pdev->dev, "client connect response message received.\n");
 597                 wake_up(&dev->wait_recvd_msg);
 598                 break;
 599
 600         case CLIENT_DISCONNECT_RES_CMD:
 601                 disconnect_res = (struct hbm_client_connect_response *) mei_msg;
 602                 mei_hbm_cl_disconnect_res(dev, disconnect_res);
 603                 dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n");
 604                 wake_up(&dev->wait_recvd_msg);
 605                 break;
 606
 607         case MEI_FLOW_CONTROL_CMD:
 608                 flow_control = (struct hbm_flow_control *) mei_msg;
 609                 mei_hbm_cl_flow_control_res(dev, flow_control);
 610                 dev_dbg(&dev->pdev->dev, "client flow control response message received.\n");
 611                 break;
 612
 613         case HOST_CLIENT_PROPERTIES_RES_CMD:
 614                 props_res = (struct hbm_props_response *)mei_msg;
 615                 me_client = &dev->me_clients[dev->me_client_presentation_num];
 616
 617                 if (props_res->status || !dev->me_clients) {
 618                         dev_err(&dev->pdev->dev, "reset: properties response hbm wrong status.\n");
 619                         mei_reset(dev, 1);
 620                         return;
 621                 }
 622
 623                 if (me_client->client_id != props_res->address) {
 624                         dev_err(&dev->pdev->dev, "reset: host properties response address mismatch\n");
 625                         mei_reset(dev, 1);
 626                         return;
 627                 }
 628
 629                 if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
 630                     dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) {
 631                         dev_err(&dev->pdev->dev, "reset: unexpected properties response\n");
 632                         mei_reset(dev, 1);
 633
 634                         return;
 635                 }
 636
 637                 me_client->props = props_res->client_properties;
 638                 dev->me_client_index++;
 639                 dev->me_client_presentation_num++;
 640
 641                 /* request property for the next client */
 642                 mei_hbm_prop_req(dev);
 643
 644                 break;
 645
 646         case HOST_ENUM_RES_CMD:
 647                 enum_res = (struct hbm_host_enum_response *) mei_msg;
 648                 memcpy(dev->me_clients_map, enum_res->valid_addresses, 32);
 649                 if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
 650                     dev->hbm_state == MEI_HBM_ENUM_CLIENTS) {
 651                                 dev->init_clients_timer = 0;
 652                                 dev->me_client_presentation_num = 0;
 653                                 dev->me_client_index = 0;
 654                                 mei_hbm_me_cl_allocate(dev);
 655                                 dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES;
 656
 657                                 /* first property reqeust */
 658                                 mei_hbm_prop_req(dev);
 659                 } else {
 660                         dev_err(&dev->pdev->dev, "reset: unexpected enumeration response hbm.\n");
 661                         mei_reset(dev, 1);
 662                         return;
 663                 }
 664                 break;
 665
 666         case HOST_STOP_RES_CMD:
 667
 668                 if (dev->hbm_state != MEI_HBM_STOP)
 669                         dev_err(&dev->pdev->dev, "unexpected stop response hbm.\n");
 670                 dev->dev_state = MEI_DEV_DISABLED;
 671                 dev_info(&dev->pdev->dev, "reset: FW stop response.\n");
 672                 mei_reset(dev, 1);
 673                 break;
 674
 675         case CLIENT_DISCONNECT_REQ_CMD:
 676                 /* search for client */
 677                 disconnect_req = (struct hbm_client_connect_request *)mei_msg;
 678                 mei_hbm_fw_disconnect_req(dev, disconnect_req);
 679                 break;
 680
 681         case ME_STOP_REQ_CMD:
 682
 683                 dev->hbm_state = MEI_HBM_STOP;
 684                 mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr,
 685                                         dev->wr_ext_msg.data);
 686                 break;
 687         default:
 688                 BUG();
 689                 break;
 690
 691         }
 692 }
 693