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_RESETING;
  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 /**
 127  * mei_hbm_start_req - sends start request message.
 128  *
 129  * @dev: the device structure
 130  */
 131 void mei_hbm_start_req(struct mei_device *dev)
 132 {
 133         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 134         struct hbm_host_version_request *start_req;
 135         const size_t len = sizeof(struct hbm_host_version_request);
 136
 137         mei_hbm_hdr(mei_hdr, len);
 138
 139         /* host start message */
 140         start_req = (struct hbm_host_version_request *)dev->wr_msg.data;
 141         memset(start_req, 0, len);
 142         start_req->hbm_cmd = HOST_START_REQ_CMD;
 143         start_req->host_version.major_version = HBM_MAJOR_VERSION;
 144         start_req->host_version.minor_version = HBM_MINOR_VERSION;
 145
 146         dev->recvd_msg = false;
 147         if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
 148                 dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n");
 149                 dev->dev_state = MEI_DEV_RESETING;
 150                 mei_reset(dev, 1);
 151         }
 152         dev->init_clients_state = MEI_START_MESSAGE;
 153         dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
 154         return ;
 155 }
 156
 157 /**
 158  * mei_hbm_enum_clients_req - sends enumeration client request message.
 159  *
 160  * @dev: the device structure
 161  *
 162  * returns none.
 163  */
 164 static void mei_hbm_enum_clients_req(struct mei_device *dev)
 165 {
 166         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 167         struct hbm_host_enum_request *enum_req;
 168         const size_t len = sizeof(struct hbm_host_enum_request);
 169         /* enumerate clients */
 170         mei_hbm_hdr(mei_hdr, len);
 171
 172         enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data;
 173         memset(enum_req, 0, len);
 174         enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
 175
 176         if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
 177                 dev->dev_state = MEI_DEV_RESETING;
 178                 dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
 179                 mei_reset(dev, 1);
 180         }
 181         dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE;
 182         dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
 183         return;
 184 }
 185
 186 /**
 187  * mei_hbm_prop_requsest - request property for a single client
 188  *
 189  * @dev: the device structure
 190  *
 191  * returns none.
 192  */
 193
 194 static int mei_hbm_prop_req(struct mei_device *dev)
 195 {
 196
 197         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 198         struct hbm_props_request *prop_req;
 199         const size_t len = sizeof(struct hbm_props_request);
 200         unsigned long next_client_index;
 201         u8 client_num;
 202
 203
 204         client_num = dev->me_client_presentation_num;
 205
 206         next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,
 207                                           dev->me_client_index);
 208
 209         /* We got all client properties */
 210         if (next_client_index == MEI_CLIENTS_MAX) {
 211                 schedule_work(&dev->init_work);
 212
 213                 return 0;
 214         }
 215
 216         dev->me_clients[client_num].client_id = next_client_index;
 217         dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
 218
 219         mei_hbm_hdr(mei_hdr, len);
 220         prop_req = (struct hbm_props_request *)dev->wr_msg.data;
 221
 222         memset(prop_req, 0, sizeof(struct hbm_props_request));
 223
 224
 225         prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
 226         prop_req->address = next_client_index;
 227
 228         if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
 229                 dev->dev_state = MEI_DEV_RESETING;
 230                 dev_err(&dev->pdev->dev, "Properties request command failed\n");
 231                 mei_reset(dev, 1);
 232
 233                 return -EIO;
 234         }
 235
 236         dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
 237         dev->me_client_index = next_client_index;
 238
 239         return 0;
 240 }
 241
 242 /**
 243  * mei_hbm_stop_req_prepare - perpare stop request message
 244  *
 245  * @dev - mei device
 246  * @mei_hdr - mei message header
 247  * @data - hbm message body buffer
 248  */
 249 static void mei_hbm_stop_req_prepare(struct mei_device *dev,
 250                 struct mei_msg_hdr *mei_hdr, unsigned char *data)
 251 {
 252         struct hbm_host_stop_request *req =
 253                         (struct hbm_host_stop_request *)data;
 254         const size_t len = sizeof(struct hbm_host_stop_request);
 255
 256         mei_hbm_hdr(mei_hdr, len);
 257
 258         memset(req, 0, len);
 259         req->hbm_cmd = HOST_STOP_REQ_CMD;
 260         req->reason = DRIVER_STOP_REQUEST;
 261 }
 262
 263 /**
 264  * mei_hbm_cl_flow_control_req - sends flow control requst.
 265  *
 266  * @dev: the device structure
 267  * @cl: client info
 268  *
 269  * This function returns -EIO on write failure
 270  */
 271 int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
 272 {
 273         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 274         const size_t len = sizeof(struct hbm_flow_control);
 275
 276         mei_hbm_hdr(mei_hdr, len);
 277         mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len);
 278
 279         dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n",
 280                 cl->host_client_id, cl->me_client_id);
 281
 282         return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
 283 }
 284
 285 /**
 286  * add_single_flow_creds - adds single buffer credentials.
 287  *
 288  * @file: private data ot the file object.
 289  * @flow: flow control.
 290  */
 291 static void mei_hbm_add_single_flow_creds(struct mei_device *dev,
 292                                   struct hbm_flow_control *flow)
 293 {
 294         struct mei_me_client *client;
 295         int i;
 296
 297         for (i = 0; i < dev->me_clients_num; i++) {
 298                 client = &dev->me_clients[i];
 299                 if (client && flow->me_addr == client->client_id) {
 300                         if (client->props.single_recv_buf) {
 301                                 client->mei_flow_ctrl_creds++;
 302                                 dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
 303                                     flow->me_addr);
 304                                 dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
 305                                     client->mei_flow_ctrl_creds);
 306                         } else {
 307                                 BUG();  /* error in flow control */
 308                         }
 309                 }
 310         }
 311 }
 312
 313 /**
 314  * mei_hbm_cl_flow_control_res - flow control response from me
 315  *
 316  * @dev: the device structure
 317  * @flow_control: flow control response bus message
 318  */
 319 static void mei_hbm_cl_flow_control_res(struct mei_device *dev,
 320                 struct hbm_flow_control *flow_control)
 321 {
 322         struct mei_cl *cl = NULL;
 323         struct mei_cl *next = NULL;
 324
 325         if (!flow_control->host_addr) {
 326                 /* single receive buffer */
 327                 mei_hbm_add_single_flow_creds(dev, flow_control);
 328                 return;
 329         }
 330
 331         /* normal connection */
 332         list_for_each_entry_safe(cl, next, &dev->file_list, link) {
 333                 if (mei_hbm_cl_addr_equal(cl, flow_control)) {
 334                         cl->mei_flow_ctrl_creds++;
 335                         dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n",
 336                                 flow_control->host_addr, flow_control->me_addr);
 337                         dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n",
 338                                     cl->mei_flow_ctrl_creds);
 339                                 break;
 340                 }
 341         }
 342 }
 343
 344
 345 /**
 346  * mei_hbm_cl_disconnect_req - sends disconnect message to fw.
 347  *
 348  * @dev: the device structure
 349  * @cl: a client to disconnect from
 350  *
 351  * This function returns -EIO on write failure
 352  */
 353 int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
 354 {
 355         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 356         const size_t len = sizeof(struct hbm_client_connect_request);
 357
 358         mei_hbm_hdr(mei_hdr, len);
 359         mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, dev->wr_msg.data, len);
 360
 361         return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
 362 }
 363
 364 /**
 365  * mei_hbm_cl_disconnect_res - disconnect response from ME
 366  *
 367  * @dev: the device structure
 368  * @rs: disconnect response bus message
 369  */
 370 static void mei_hbm_cl_disconnect_res(struct mei_device *dev,
 371                 struct hbm_client_connect_response *rs)
 372 {
 373         struct mei_cl *cl;
 374         struct mei_cl_cb *pos = NULL, *next = NULL;
 375
 376         dev_dbg(&dev->pdev->dev,
 377                         "disconnect_response:\n"
 378                         "ME Client = %d\n"
 379                         "Host Client = %d\n"
 380                         "Status = %d\n",
 381                         rs->me_addr,
 382                         rs->host_addr,
 383                         rs->status);
 384
 385         list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
 386                 cl = pos->cl;
 387
 388                 if (!cl) {
 389                         list_del(&pos->list);
 390                         return;
 391                 }
 392
 393                 dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n");
 394                 if (mei_hbm_cl_addr_equal(cl, rs)) {
 395                         list_del(&pos->list);
 396                         if (!rs->status)
 397                                 cl->state = MEI_FILE_DISCONNECTED;
 398
 399                         cl->status = 0;
 400                         cl->timer_count = 0;
 401                         break;
 402                 }
 403         }
 404 }
 405
 406 /**
 407  * mei_hbm_cl_connect_req - send connection request to specific me client
 408  *
 409  * @dev: the device structure
 410  * @cl: a client to connect to
 411  *
 412  * returns -EIO on write failure
 413  */
 414 int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)
 415 {
 416         struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
 417         const size_t len = sizeof(struct hbm_client_connect_request);
 418
 419         mei_hbm_hdr(mei_hdr, len);
 420         mei_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, dev->wr_msg.data, len);
 421
 422         return mei_write_message(dev, mei_hdr,  dev->wr_msg.data);
 423 }
 424
 425 /**
 426  * mei_hbm_cl_connect_res - connect resposne from the ME
 427  *
 428  * @dev: the device structure
 429  * @rs: connect response bus message
 430  */
 431 static void mei_hbm_cl_connect_res(struct mei_device *dev,
 432                 struct hbm_client_connect_response *rs)
 433 {
 434
 435         struct mei_cl *cl;
 436         struct mei_cl_cb *pos = NULL, *next = NULL;
 437
 438         dev_dbg(&dev->pdev->dev,
 439                         "connect_response:\n"
 440                         "ME Client = %d\n"
 441                         "Host Client = %d\n"
 442                         "Status = %d\n",
 443                         rs->me_addr,
 444                         rs->host_addr,
 445                         rs->status);
 446
 447         /* if WD or iamthif client treat specially */
 448
 449         if (is_treat_specially_client(&dev->wd_cl, rs)) {
 450                 dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
 451                 mei_watchdog_register(dev);
 452
 453                 return;
 454         }
 455
 456         if (is_treat_specially_client(&dev->iamthif_cl, rs)) {
 457                 dev->iamthif_state = MEI_IAMTHIF_IDLE;
 458                 return;
 459         }
 460         list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
 461
 462                 cl = pos->cl;
 463                 if (!cl) {
 464                         list_del(&pos->list);
 465                         return;
 466                 }
 467                 if (pos->fop_type == MEI_FOP_IOCTL) {
 468                         if (is_treat_specially_client(cl, rs)) {
 469                                 list_del(&pos->list);
 470                                 cl->status = 0;
 471                                 cl->timer_count = 0;
 472                                 break;
 473                         }
 474                 }
 475         }
 476 }
 477
 478
 479 /**
 480  * mei_client_disconnect_request - disconnect request initiated by me
 481  *  host sends disoconnect response
 482  *
 483  * @dev: the device structure.
 484  * @disconnect_req: disconnect request bus message from the me
 485  */
 486 static void mei_hbm_fw_disconnect_req(struct mei_device *dev,
 487                 struct hbm_client_connect_request *disconnect_req)
 488 {
 489         struct mei_cl *cl, *next;
 490         const size_t len = sizeof(struct hbm_client_connect_response);
 491
 492         list_for_each_entry_safe(cl, next, &dev->file_list, link) {
 493                 if (mei_hbm_cl_addr_equal(cl, disconnect_req)) {
 494                         dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n",
 495                                         disconnect_req->host_addr,
 496                                         disconnect_req->me_addr);
 497                         cl->state = MEI_FILE_DISCONNECTED;
 498                         cl->timer_count = 0;
 499                         if (cl == &dev->wd_cl)
 500                                 dev->wd_pending = false;
 501                         else if (cl == &dev->iamthif_cl)
 502                                 dev->iamthif_timer = 0;
 503
 504                         /* prepare disconnect response */
 505                         mei_hbm_hdr(&dev->wr_ext_msg.hdr, len);
 506                         mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD,
 507                                          dev->wr_ext_msg.data, len);
 508                         break;
 509                 }
 510         }
 511 }
 512
 513
 514 /**
 515  * mei_hbm_dispatch - bottom half read routine after ISR to
 516  * handle the read bus message cmd processing.
 517  *
 518  * @dev: the device structure
 519  * @mei_hdr: header of bus message
 520  */
 521 void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
 522 {
 523         struct mei_bus_message *mei_msg;
 524         struct mei_me_client *me_client;
 525         struct hbm_host_version_response *version_res;
 526         struct hbm_client_connect_response *connect_res;
 527         struct hbm_client_connect_response *disconnect_res;
 528         struct hbm_client_connect_request *disconnect_req;
 529         struct hbm_flow_control *flow_control;
 530         struct hbm_props_response *props_res;
 531         struct hbm_host_enum_response *enum_res;
 532
 533         /* read the message to our buffer */
 534         BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));
 535         mei_read_slots(dev, dev->rd_msg_buf, hdr->length);
 536         mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
 537
 538         switch (mei_msg->hbm_cmd) {
 539         case HOST_START_RES_CMD:
 540                 version_res = (struct hbm_host_version_response *)mei_msg;
 541                 if (!version_res->host_version_supported) {
 542                         dev->version = version_res->me_max_version;
 543                         dev_dbg(&dev->pdev->dev, "version mismatch.\n");
 544
 545                         mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr,
 546                                                 dev->wr_msg.data);
 547                         mei_write_message(dev, &dev->wr_msg.hdr,
 548                                         dev->wr_msg.data);
 549                         return;
 550                 }
 551
 552                 dev->version.major_version = HBM_MAJOR_VERSION;
 553                 dev->version.minor_version = HBM_MINOR_VERSION;
 554                 if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
 555                     dev->init_clients_state == MEI_START_MESSAGE) {
 556                         dev->init_clients_timer = 0;
 557                         mei_hbm_enum_clients_req(dev);
 558                 } else {
 559                         dev->recvd_msg = false;
 560                         dev_dbg(&dev->pdev->dev, "reset due to received hbm: host start\n");
 561                         mei_reset(dev, 1);
 562                         return;
 563                 }
 564
 565                 dev->recvd_msg = true;
 566                 dev_dbg(&dev->pdev->dev, "host start response message received.\n");
 567                 break;
 568
 569         case CLIENT_CONNECT_RES_CMD:
 570                 connect_res = (struct hbm_client_connect_response *) mei_msg;
 571                 mei_hbm_cl_connect_res(dev, connect_res);
 572                 dev_dbg(&dev->pdev->dev, "client connect response message received.\n");
 573                 wake_up(&dev->wait_recvd_msg);
 574                 break;
 575
 576         case CLIENT_DISCONNECT_RES_CMD:
 577                 disconnect_res = (struct hbm_client_connect_response *) mei_msg;
 578                 mei_hbm_cl_disconnect_res(dev, disconnect_res);
 579                 dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n");
 580                 wake_up(&dev->wait_recvd_msg);
 581                 break;
 582
 583         case MEI_FLOW_CONTROL_CMD:
 584                 flow_control = (struct hbm_flow_control *) mei_msg;
 585                 mei_hbm_cl_flow_control_res(dev, flow_control);
 586                 dev_dbg(&dev->pdev->dev, "client flow control response message received.\n");
 587                 break;
 588
 589         case HOST_CLIENT_PROPERTIES_RES_CMD:
 590                 props_res = (struct hbm_props_response *)mei_msg;
 591                 me_client = &dev->me_clients[dev->me_client_presentation_num];
 592
 593                 if (props_res->status || !dev->me_clients) {
 594                         dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n");
 595                         mei_reset(dev, 1);
 596                         return;
 597                 }
 598
 599                 if (me_client->client_id != props_res->address) {
 600                         dev_err(&dev->pdev->dev,
 601                                 "Host client properties reply mismatch\n");
 602                         mei_reset(dev, 1);
 603
 604                         return;
 605                 }
 606
 607                 if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
 608                     dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) {
 609                         dev_err(&dev->pdev->dev,
 610                                 "Unexpected client properties reply\n");
 611                         mei_reset(dev, 1);
 612
 613                         return;
 614                 }
 615
 616                 me_client->props = props_res->client_properties;
 617                 dev->me_client_index++;
 618                 dev->me_client_presentation_num++;
 619
 620                 /* request property for the next client */
 621                 mei_hbm_prop_req(dev);
 622
 623                 break;
 624
 625         case HOST_ENUM_RES_CMD:
 626                 enum_res = (struct hbm_host_enum_response *) mei_msg;
 627                 memcpy(dev->me_clients_map, enum_res->valid_addresses, 32);
 628                 if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
 629                     dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) {
 630                                 dev->init_clients_timer = 0;
 631                                 dev->me_client_presentation_num = 0;
 632                                 dev->me_client_index = 0;
 633                                 mei_hbm_me_cl_allocate(dev);
 634                                 dev->init_clients_state =
 635                                         MEI_CLIENT_PROPERTIES_MESSAGE;
 636
 637                                 /* first property reqeust */
 638                                 mei_hbm_prop_req(dev);
 639                 } else {
 640                         dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n");
 641                         mei_reset(dev, 1);
 642                         return;
 643                 }
 644                 break;
 645
 646         case HOST_STOP_RES_CMD:
 647                 dev->dev_state = MEI_DEV_DISABLED;
 648                 dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n");
 649                 mei_reset(dev, 1);
 650                 break;
 651
 652         case CLIENT_DISCONNECT_REQ_CMD:
 653                 /* search for client */
 654                 disconnect_req = (struct hbm_client_connect_request *)mei_msg;
 655                 mei_hbm_fw_disconnect_req(dev, disconnect_req);
 656                 break;
 657
 658         case ME_STOP_REQ_CMD:
 659
 660                 mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr,
 661                                         dev->wr_ext_msg.data);
 662                 break;
 663         default:
 664                 BUG();
 665                 break;
 666
 667         }
 668 }
 669