1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2003-2020, Intel Corporation. All rights reserved. 4 * Intel Management Engine Interface (Intel MEI) Linux driver 5 */ 6 #include <linux/export.h> 7 #include <linux/sched.h> 8 #include <linux/wait.h> 9 #include <linux/pm_runtime.h> 10 #include <linux/slab.h> 11 12 #include <linux/mei.h> 13 14 #include "mei_dev.h" 15 #include "hbm.h" 16 #include "client.h" 17 18 static const char *mei_hbm_status_str(enum mei_hbm_status status) 19 { 20 #define MEI_HBM_STATUS(status) case MEI_HBMS_##status: return #status 21 switch (status) { 22 MEI_HBM_STATUS(SUCCESS); 23 MEI_HBM_STATUS(CLIENT_NOT_FOUND); 24 MEI_HBM_STATUS(ALREADY_EXISTS); 25 MEI_HBM_STATUS(REJECTED); 26 MEI_HBM_STATUS(INVALID_PARAMETER); 27 MEI_HBM_STATUS(NOT_ALLOWED); 28 MEI_HBM_STATUS(ALREADY_STARTED); 29 MEI_HBM_STATUS(NOT_STARTED); 30 default: return "unknown"; 31 } 32 #undef MEI_HBM_STATUS 33 }; 34 35 static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status) 36 { 37 #define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status 38 switch (status) { 39 MEI_CL_CS(SUCCESS); 40 MEI_CL_CS(NOT_FOUND); 41 MEI_CL_CS(ALREADY_STARTED); 42 MEI_CL_CS(OUT_OF_RESOURCES); 43 MEI_CL_CS(MESSAGE_SMALL); 44 MEI_CL_CS(NOT_ALLOWED); 45 default: return "unknown"; 46 } 47 #undef MEI_CL_CCS 48 } 49 50 const char *mei_hbm_state_str(enum mei_hbm_state state) 51 { 52 #define MEI_HBM_STATE(state) case MEI_HBM_##state: return #state 53 switch (state) { 54 MEI_HBM_STATE(IDLE); 55 MEI_HBM_STATE(STARTING); 56 MEI_HBM_STATE(STARTED); 57 MEI_HBM_STATE(DR_SETUP); 58 MEI_HBM_STATE(ENUM_CLIENTS); 59 MEI_HBM_STATE(CLIENT_PROPERTIES); 60 MEI_HBM_STATE(STOPPED); 61 default: 62 return "unknown"; 63 } 64 #undef MEI_HBM_STATE 65 } 66 67 /** 68 * mei_cl_conn_status_to_errno - convert client connect response 69 * status to error code 70 * 71 * @status: client connect response status 72 * 73 * Return: corresponding error code 74 */ 75 static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status) 76 { 77 switch (status) { 78 case MEI_CL_CONN_SUCCESS: return 0; 79 case MEI_CL_CONN_NOT_FOUND: return -ENOTTY; 80 case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY; 81 case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY; 82 case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL; 83 case MEI_CL_CONN_NOT_ALLOWED: return -EBUSY; 84 default: return -EINVAL; 85 } 86 } 87 88 /** 89 * mei_hbm_write_message - wrapper for sending hbm messages. 90 * 91 * @dev: mei device 92 * @hdr: mei header 93 * @data: payload 94 */ 95 static inline int mei_hbm_write_message(struct mei_device *dev, 96 struct mei_msg_hdr *hdr, 97 const void *data) 98 { 99 return mei_write_message(dev, hdr, sizeof(*hdr), data, hdr->length); 100 } 101 102 /** 103 * mei_hbm_idle - set hbm to idle state 104 * 105 * @dev: the device structure 106 */ 107 void mei_hbm_idle(struct mei_device *dev) 108 { 109 dev->init_clients_timer = 0; 110 dev->hbm_state = MEI_HBM_IDLE; 111 } 112 113 /** 114 * mei_hbm_reset - reset hbm counters and book keeping data structurs 115 * 116 * @dev: the device structure 117 */ 118 void mei_hbm_reset(struct mei_device *dev) 119 { 120 mei_me_cl_rm_all(dev); 121 122 mei_hbm_idle(dev); 123 } 124 125 /** 126 * mei_hbm_hdr - construct hbm header 127 * 128 * @mei_hdr: hbm header 129 * @length: payload length 130 */ 131 132 static inline void mei_hbm_hdr(struct mei_msg_hdr *mei_hdr, size_t length) 133 { 134 memset(mei_hdr, 0, sizeof(*mei_hdr)); 135 mei_hdr->length = length; 136 mei_hdr->msg_complete = 1; 137 } 138 139 /** 140 * mei_hbm_cl_hdr - construct client hbm header 141 * 142 * @cl: client 143 * @hbm_cmd: host bus message command 144 * @buf: buffer for cl header 145 * @len: buffer length 146 */ 147 static inline 148 void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) 149 { 150 struct mei_hbm_cl_cmd *cmd = buf; 151 152 memset(cmd, 0, len); 153 154 cmd->hbm_cmd = hbm_cmd; 155 cmd->host_addr = mei_cl_host_addr(cl); 156 cmd->me_addr = mei_cl_me_id(cl); 157 } 158 159 /** 160 * mei_hbm_cl_write - write simple hbm client message 161 * 162 * @dev: the device structure 163 * @cl: client 164 * @hbm_cmd: host bus message command 165 * @buf: message buffer 166 * @len: buffer length 167 * 168 * Return: 0 on success, <0 on failure. 169 */ 170 static inline int mei_hbm_cl_write(struct mei_device *dev, struct mei_cl *cl, 171 u8 hbm_cmd, void *buf, size_t len) 172 { 173 struct mei_msg_hdr mei_hdr; 174 175 mei_hbm_hdr(&mei_hdr, len); 176 mei_hbm_cl_hdr(cl, hbm_cmd, buf, len); 177 178 return mei_hbm_write_message(dev, &mei_hdr, buf); 179 } 180 181 /** 182 * mei_hbm_cl_addr_equal - check if the client's and 183 * the message address match 184 * 185 * @cl: client 186 * @cmd: hbm client message 187 * 188 * Return: true if addresses are the same 189 */ 190 static inline 191 bool mei_hbm_cl_addr_equal(struct mei_cl *cl, struct mei_hbm_cl_cmd *cmd) 192 { 193 return mei_cl_host_addr(cl) == cmd->host_addr && 194 mei_cl_me_id(cl) == cmd->me_addr; 195 } 196 197 /** 198 * mei_hbm_cl_find_by_cmd - find recipient client 199 * 200 * @dev: the device structure 201 * @buf: a buffer with hbm cl command 202 * 203 * Return: the recipient client or NULL if not found 204 */ 205 static inline 206 struct mei_cl *mei_hbm_cl_find_by_cmd(struct mei_device *dev, void *buf) 207 { 208 struct mei_hbm_cl_cmd *cmd = (struct mei_hbm_cl_cmd *)buf; 209 struct mei_cl *cl; 210 211 list_for_each_entry(cl, &dev->file_list, link) 212 if (mei_hbm_cl_addr_equal(cl, cmd)) 213 return cl; 214 return NULL; 215 } 216 217 218 /** 219 * mei_hbm_start_wait - wait for start response message. 220 * 221 * @dev: the device structure 222 * 223 * Return: 0 on success and < 0 on failure 224 */ 225 int mei_hbm_start_wait(struct mei_device *dev) 226 { 227 int ret; 228 229 if (dev->hbm_state > MEI_HBM_STARTING) 230 return 0; 231 232 mutex_unlock(&dev->device_lock); 233 ret = wait_event_timeout(dev->wait_hbm_start, 234 dev->hbm_state != MEI_HBM_STARTING, 235 mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); 236 mutex_lock(&dev->device_lock); 237 238 if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) { 239 dev->hbm_state = MEI_HBM_IDLE; 240 dev_err(dev->dev, "waiting for mei start failed\n"); 241 return -ETIME; 242 } 243 return 0; 244 } 245 246 /** 247 * mei_hbm_start_req - sends start request message. 248 * 249 * @dev: the device structure 250 * 251 * Return: 0 on success and < 0 on failure 252 */ 253 int mei_hbm_start_req(struct mei_device *dev) 254 { 255 struct mei_msg_hdr mei_hdr; 256 struct hbm_host_version_request req; 257 int ret; 258 259 mei_hbm_reset(dev); 260 261 mei_hbm_hdr(&mei_hdr, sizeof(req)); 262 263 /* host start message */ 264 memset(&req, 0, sizeof(req)); 265 req.hbm_cmd = HOST_START_REQ_CMD; 266 req.host_version.major_version = HBM_MAJOR_VERSION; 267 req.host_version.minor_version = HBM_MINOR_VERSION; 268 269 dev->hbm_state = MEI_HBM_IDLE; 270 ret = mei_hbm_write_message(dev, &mei_hdr, &req); 271 if (ret) { 272 dev_err(dev->dev, "version message write failed: ret = %d\n", 273 ret); 274 return ret; 275 } 276 277 dev->hbm_state = MEI_HBM_STARTING; 278 dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; 279 mei_schedule_stall_timer(dev); 280 return 0; 281 } 282 283 /** 284 * mei_hbm_dma_setup_req() - setup DMA request 285 * @dev: the device structure 286 * 287 * Return: 0 on success and < 0 on failure 288 */ 289 static int mei_hbm_dma_setup_req(struct mei_device *dev) 290 { 291 struct mei_msg_hdr mei_hdr; 292 struct hbm_dma_setup_request req; 293 unsigned int i; 294 int ret; 295 296 mei_hbm_hdr(&mei_hdr, sizeof(req)); 297 298 memset(&req, 0, sizeof(req)); 299 req.hbm_cmd = MEI_HBM_DMA_SETUP_REQ_CMD; 300 for (i = 0; i < DMA_DSCR_NUM; i++) { 301 phys_addr_t paddr; 302 303 paddr = dev->dr_dscr[i].daddr; 304 req.dma_dscr[i].addr_hi = upper_32_bits(paddr); 305 req.dma_dscr[i].addr_lo = lower_32_bits(paddr); 306 req.dma_dscr[i].size = dev->dr_dscr[i].size; 307 } 308 309 mei_dma_ring_reset(dev); 310 311 ret = mei_hbm_write_message(dev, &mei_hdr, &req); 312 if (ret) { 313 dev_err(dev->dev, "dma setup request write failed: ret = %d.\n", 314 ret); 315 return ret; 316 } 317 318 dev->hbm_state = MEI_HBM_DR_SETUP; 319 dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; 320 mei_schedule_stall_timer(dev); 321 return 0; 322 } 323 324 /** 325 * mei_hbm_capabilities_req - request capabilities 326 * 327 * @dev: the device structure 328 * 329 * Return: 0 on success and < 0 on failure 330 */ 331 static int mei_hbm_capabilities_req(struct mei_device *dev) 332 { 333 struct mei_msg_hdr mei_hdr; 334 struct hbm_capability_request req; 335 int ret; 336 337 mei_hbm_hdr(&mei_hdr, sizeof(req)); 338 339 memset(&req, 0, sizeof(req)); 340 req.hbm_cmd = MEI_HBM_CAPABILITIES_REQ_CMD; 341 if (dev->hbm_f_vt_supported) 342 req.capability_requested[0] |= HBM_CAP_VT; 343 if (dev->hbm_f_cd_supported) 344 req.capability_requested[0] |= HBM_CAP_CD; 345 346 ret = mei_hbm_write_message(dev, &mei_hdr, &req); 347 if (ret) { 348 dev_err(dev->dev, 349 "capabilities request write failed: ret = %d.\n", ret); 350 return ret; 351 } 352 353 dev->hbm_state = MEI_HBM_CAP_SETUP; 354 dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; 355 mei_schedule_stall_timer(dev); 356 return 0; 357 } 358 359 /** 360 * mei_hbm_enum_clients_req - sends enumeration client request message. 361 * 362 * @dev: the device structure 363 * 364 * Return: 0 on success and < 0 on failure 365 */ 366 static int mei_hbm_enum_clients_req(struct mei_device *dev) 367 { 368 struct mei_msg_hdr mei_hdr; 369 struct hbm_host_enum_request req; 370 int ret; 371 372 /* enumerate clients */ 373 mei_hbm_hdr(&mei_hdr, sizeof(req)); 374 375 memset(&req, 0, sizeof(req)); 376 req.hbm_cmd = HOST_ENUM_REQ_CMD; 377 req.flags |= dev->hbm_f_dc_supported ? MEI_HBM_ENUM_F_ALLOW_ADD : 0; 378 req.flags |= dev->hbm_f_ie_supported ? 379 MEI_HBM_ENUM_F_IMMEDIATE_ENUM : 0; 380 381 ret = mei_hbm_write_message(dev, &mei_hdr, &req); 382 if (ret) { 383 dev_err(dev->dev, "enumeration request write failed: ret = %d.\n", 384 ret); 385 return ret; 386 } 387 dev->hbm_state = MEI_HBM_ENUM_CLIENTS; 388 dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; 389 mei_schedule_stall_timer(dev); 390 return 0; 391 } 392 393 /** 394 * mei_hbm_me_cl_add - add new me client to the list 395 * 396 * @dev: the device structure 397 * @res: hbm property response 398 * 399 * Return: 0 on success and -ENOMEM on allocation failure 400 */ 401 402 static int mei_hbm_me_cl_add(struct mei_device *dev, 403 struct hbm_props_response *res) 404 { 405 struct mei_me_client *me_cl; 406 const uuid_le *uuid = &res->client_properties.protocol_name; 407 408 mei_me_cl_rm_by_uuid(dev, uuid); 409 410 me_cl = kzalloc(sizeof(*me_cl), GFP_KERNEL); 411 if (!me_cl) 412 return -ENOMEM; 413 414 mei_me_cl_init(me_cl); 415 416 me_cl->props = res->client_properties; 417 me_cl->client_id = res->me_addr; 418 me_cl->tx_flow_ctrl_creds = 0; 419 420 mei_me_cl_add(dev, me_cl); 421 422 return 0; 423 } 424 425 /** 426 * mei_hbm_add_cl_resp - send response to fw on client add request 427 * 428 * @dev: the device structure 429 * @addr: me address 430 * @status: response status 431 * 432 * Return: 0 on success and < 0 on failure 433 */ 434 static int mei_hbm_add_cl_resp(struct mei_device *dev, u8 addr, u8 status) 435 { 436 struct mei_msg_hdr mei_hdr; 437 struct hbm_add_client_response resp; 438 int ret; 439 440 dev_dbg(dev->dev, "adding client response\n"); 441 442 mei_hbm_hdr(&mei_hdr, sizeof(resp)); 443 444 memset(&resp, 0, sizeof(resp)); 445 resp.hbm_cmd = MEI_HBM_ADD_CLIENT_RES_CMD; 446 resp.me_addr = addr; 447 resp.status = status; 448 449 ret = mei_hbm_write_message(dev, &mei_hdr, &resp); 450 if (ret) 451 dev_err(dev->dev, "add client response write failed: ret = %d\n", 452 ret); 453 return ret; 454 } 455 456 /** 457 * mei_hbm_fw_add_cl_req - request from the fw to add a client 458 * 459 * @dev: the device structure 460 * @req: add client request 461 * 462 * Return: 0 on success and < 0 on failure 463 */ 464 static int mei_hbm_fw_add_cl_req(struct mei_device *dev, 465 struct hbm_add_client_request *req) 466 { 467 int ret; 468 u8 status = MEI_HBMS_SUCCESS; 469 470 BUILD_BUG_ON(sizeof(struct hbm_add_client_request) != 471 sizeof(struct hbm_props_response)); 472 473 ret = mei_hbm_me_cl_add(dev, (struct hbm_props_response *)req); 474 if (ret) 475 status = !MEI_HBMS_SUCCESS; 476 477 if (dev->dev_state == MEI_DEV_ENABLED) 478 schedule_work(&dev->bus_rescan_work); 479 480 return mei_hbm_add_cl_resp(dev, req->me_addr, status); 481 } 482 483 /** 484 * mei_hbm_cl_notify_req - send notification request 485 * 486 * @dev: the device structure 487 * @cl: a client to disconnect from 488 * @start: true for start false for stop 489 * 490 * Return: 0 on success and -EIO on write failure 491 */ 492 int mei_hbm_cl_notify_req(struct mei_device *dev, 493 struct mei_cl *cl, u8 start) 494 { 495 496 struct mei_msg_hdr mei_hdr; 497 struct hbm_notification_request req; 498 int ret; 499 500 mei_hbm_hdr(&mei_hdr, sizeof(req)); 501 mei_hbm_cl_hdr(cl, MEI_HBM_NOTIFY_REQ_CMD, &req, sizeof(req)); 502 503 req.start = start; 504 505 ret = mei_hbm_write_message(dev, &mei_hdr, &req); 506 if (ret) 507 dev_err(dev->dev, "notify request failed: ret = %d\n", ret); 508 509 return ret; 510 } 511 512 /** 513 * notify_res_to_fop - convert notification response to the proper 514 * notification FOP 515 * 516 * @cmd: client notification start response command 517 * 518 * Return: MEI_FOP_NOTIFY_START or MEI_FOP_NOTIFY_STOP; 519 */ 520 static inline enum mei_cb_file_ops notify_res_to_fop(struct mei_hbm_cl_cmd *cmd) 521 { 522 struct hbm_notification_response *rs = 523 (struct hbm_notification_response *)cmd; 524 525 return mei_cl_notify_req2fop(rs->start); 526 } 527 528 /** 529 * mei_hbm_cl_notify_start_res - update the client state according 530 * notify start response 531 * 532 * @dev: the device structure 533 * @cl: mei host client 534 * @cmd: client notification start response command 535 */ 536 static void mei_hbm_cl_notify_start_res(struct mei_device *dev, 537 struct mei_cl *cl, 538 struct mei_hbm_cl_cmd *cmd) 539 { 540 struct hbm_notification_response *rs = 541 (struct hbm_notification_response *)cmd; 542 543 cl_dbg(dev, cl, "hbm: notify start response status=%d\n", rs->status); 544 545 if (rs->status == MEI_HBMS_SUCCESS || 546 rs->status == MEI_HBMS_ALREADY_STARTED) { 547 cl->notify_en = true; 548 cl->status = 0; 549 } else { 550 cl->status = -EINVAL; 551 } 552 } 553 554 /** 555 * mei_hbm_cl_notify_stop_res - update the client state according 556 * notify stop response 557 * 558 * @dev: the device structure 559 * @cl: mei host client 560 * @cmd: client notification stop response command 561 */ 562 static void mei_hbm_cl_notify_stop_res(struct mei_device *dev, 563 struct mei_cl *cl, 564 struct mei_hbm_cl_cmd *cmd) 565 { 566 struct hbm_notification_response *rs = 567 (struct hbm_notification_response *)cmd; 568 569 cl_dbg(dev, cl, "hbm: notify stop response status=%d\n", rs->status); 570 571 if (rs->status == MEI_HBMS_SUCCESS || 572 rs->status == MEI_HBMS_NOT_STARTED) { 573 cl->notify_en = false; 574 cl->status = 0; 575 } else { 576 /* TODO: spec is not clear yet about other possible issues */ 577 cl->status = -EINVAL; 578 } 579 } 580 581 /** 582 * mei_hbm_cl_notify - signal notification event 583 * 584 * @dev: the device structure 585 * @cmd: notification client message 586 */ 587 static void mei_hbm_cl_notify(struct mei_device *dev, 588 struct mei_hbm_cl_cmd *cmd) 589 { 590 struct mei_cl *cl; 591 592 cl = mei_hbm_cl_find_by_cmd(dev, cmd); 593 if (cl) 594 mei_cl_notify(cl); 595 } 596 597 /** 598 * mei_hbm_cl_dma_map_req - send client dma map request 599 * 600 * @dev: the device structure 601 * @cl: mei host client 602 * 603 * Return: 0 on success and -EIO on write failure 604 */ 605 int mei_hbm_cl_dma_map_req(struct mei_device *dev, struct mei_cl *cl) 606 { 607 struct mei_msg_hdr mei_hdr; 608 struct hbm_client_dma_map_request req; 609 int ret; 610 611 mei_hbm_hdr(&mei_hdr, sizeof(req)); 612 613 memset(&req, 0, sizeof(req)); 614 615 req.hbm_cmd = MEI_HBM_CLIENT_DMA_MAP_REQ_CMD; 616 req.client_buffer_id = cl->dma.buffer_id; 617 req.address_lsb = lower_32_bits(cl->dma.daddr); 618 req.address_msb = upper_32_bits(cl->dma.daddr); 619 req.size = cl->dma.size; 620 621 ret = mei_hbm_write_message(dev, &mei_hdr, &req); 622 if (ret) 623 dev_err(dev->dev, "dma map request failed: ret = %d\n", ret); 624 625 return ret; 626 } 627 628 /** 629 * mei_hbm_cl_dma_unmap_req - send client dma unmap request 630 * 631 * @dev: the device structure 632 * @cl: mei host client 633 * 634 * Return: 0 on success and -EIO on write failure 635 */ 636 int mei_hbm_cl_dma_unmap_req(struct mei_device *dev, struct mei_cl *cl) 637 { 638 struct mei_msg_hdr mei_hdr; 639 struct hbm_client_dma_unmap_request req; 640 int ret; 641 642 mei_hbm_hdr(&mei_hdr, sizeof(req)); 643 644 memset(&req, 0, sizeof(req)); 645 646 req.hbm_cmd = MEI_HBM_CLIENT_DMA_UNMAP_REQ_CMD; 647 req.client_buffer_id = cl->dma.buffer_id; 648 649 ret = mei_hbm_write_message(dev, &mei_hdr, &req); 650 if (ret) 651 dev_err(dev->dev, "dma unmap request failed: ret = %d\n", ret); 652 653 return ret; 654 } 655 656 static void mei_hbm_cl_dma_map_res(struct mei_device *dev, 657 struct hbm_client_dma_response *res) 658 { 659 struct mei_cl *cl; 660 struct mei_cl_cb *cb, *next; 661 662 cl = NULL; 663 list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list, list) { 664 if (cb->fop_type != MEI_FOP_DMA_MAP) 665 continue; 666 if (!cb->cl->dma.buffer_id || cb->cl->dma_mapped) 667 continue; 668 669 cl = cb->cl; 670 break; 671 } 672 if (!cl) 673 return; 674 675 if (res->status) { 676 dev_err(dev->dev, "cl dma map failed %d\n", res->status); 677 cl->status = -EFAULT; 678 } else { 679 dev_dbg(dev->dev, "cl dma map succeeded\n"); 680 cl->dma_mapped = 1; 681 cl->status = 0; 682 } 683 wake_up(&cl->wait); 684 } 685 686 static void mei_hbm_cl_dma_unmap_res(struct mei_device *dev, 687 struct hbm_client_dma_response *res) 688 { 689 struct mei_cl *cl; 690 struct mei_cl_cb *cb, *next; 691 692 cl = NULL; 693 list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list, list) { 694 if (cb->fop_type != MEI_FOP_DMA_UNMAP) 695 continue; 696 if (!cb->cl->dma.buffer_id || !cb->cl->dma_mapped) 697 continue; 698 699 cl = cb->cl; 700 break; 701 } 702 if (!cl) 703 return; 704 705 if (res->status) { 706 dev_err(dev->dev, "cl dma unmap failed %d\n", res->status); 707 cl->status = -EFAULT; 708 } else { 709 dev_dbg(dev->dev, "cl dma unmap succeeded\n"); 710 cl->dma_mapped = 0; 711 cl->status = 0; 712 } 713 wake_up(&cl->wait); 714 } 715 716 /** 717 * mei_hbm_prop_req - request property for a single client 718 * 719 * @dev: the device structure 720 * @start_idx: client index to start search 721 * 722 * Return: 0 on success and < 0 on failure 723 */ 724 static int mei_hbm_prop_req(struct mei_device *dev, unsigned long start_idx) 725 { 726 struct mei_msg_hdr mei_hdr; 727 struct hbm_props_request req; 728 unsigned long addr; 729 int ret; 730 731 addr = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, start_idx); 732 733 /* We got all client properties */ 734 if (addr == MEI_CLIENTS_MAX) { 735 dev->hbm_state = MEI_HBM_STARTED; 736 mei_host_client_init(dev); 737 return 0; 738 } 739 740 mei_hbm_hdr(&mei_hdr, sizeof(req)); 741 742 memset(&req, 0, sizeof(req)); 743 744 req.hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; 745 req.me_addr = addr; 746 747 ret = mei_hbm_write_message(dev, &mei_hdr, &req); 748 if (ret) { 749 dev_err(dev->dev, "properties request write failed: ret = %d\n", 750 ret); 751 return ret; 752 } 753 754 dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; 755 mei_schedule_stall_timer(dev); 756 757 return 0; 758 } 759 760 /** 761 * mei_hbm_pg - sends pg command 762 * 763 * @dev: the device structure 764 * @pg_cmd: the pg command code 765 * 766 * Return: -EIO on write failure 767 * -EOPNOTSUPP if the operation is not supported by the protocol 768 */ 769 int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) 770 { 771 struct mei_msg_hdr mei_hdr; 772 struct hbm_power_gate req; 773 int ret; 774 775 if (!dev->hbm_f_pg_supported) 776 return -EOPNOTSUPP; 777 778 mei_hbm_hdr(&mei_hdr, sizeof(req)); 779 780 memset(&req, 0, sizeof(req)); 781 req.hbm_cmd = pg_cmd; 782 783 ret = mei_hbm_write_message(dev, &mei_hdr, &req); 784 if (ret) 785 dev_err(dev->dev, "power gate command write failed.\n"); 786 return ret; 787 } 788 EXPORT_SYMBOL_GPL(mei_hbm_pg); 789 790 /** 791 * mei_hbm_stop_req - send stop request message 792 * 793 * @dev: mei device 794 * 795 * Return: -EIO on write failure 796 */ 797 static int mei_hbm_stop_req(struct mei_device *dev) 798 { 799 struct mei_msg_hdr mei_hdr; 800 struct hbm_host_stop_request req; 801 802 mei_hbm_hdr(&mei_hdr, sizeof(req)); 803 804 memset(&req, 0, sizeof(req)); 805 req.hbm_cmd = HOST_STOP_REQ_CMD; 806 req.reason = DRIVER_STOP_REQUEST; 807 808 return mei_hbm_write_message(dev, &mei_hdr, &req); 809 } 810 811 /** 812 * mei_hbm_cl_flow_control_req - sends flow control request. 813 * 814 * @dev: the device structure 815 * @cl: client info 816 * 817 * Return: -EIO on write failure 818 */ 819 int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl) 820 { 821 struct hbm_flow_control req; 822 823 cl_dbg(dev, cl, "sending flow control\n"); 824 return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, 825 &req, sizeof(req)); 826 } 827 828 /** 829 * mei_hbm_add_single_tx_flow_ctrl_creds - adds single buffer credentials. 830 * 831 * @dev: the device structure 832 * @fctrl: flow control response bus message 833 * 834 * Return: 0 on success, < 0 otherwise 835 */ 836 static int mei_hbm_add_single_tx_flow_ctrl_creds(struct mei_device *dev, 837 struct hbm_flow_control *fctrl) 838 { 839 struct mei_me_client *me_cl; 840 int rets; 841 842 me_cl = mei_me_cl_by_id(dev, fctrl->me_addr); 843 if (!me_cl) { 844 dev_err(dev->dev, "no such me client %d\n", fctrl->me_addr); 845 return -ENOENT; 846 } 847 848 if (WARN_ON(me_cl->props.single_recv_buf == 0)) { 849 rets = -EINVAL; 850 goto out; 851 } 852 853 me_cl->tx_flow_ctrl_creds++; 854 dev_dbg(dev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n", 855 fctrl->me_addr, me_cl->tx_flow_ctrl_creds); 856 857 rets = 0; 858 out: 859 mei_me_cl_put(me_cl); 860 return rets; 861 } 862 863 /** 864 * mei_hbm_cl_tx_flow_ctrl_creds_res - flow control response from me 865 * 866 * @dev: the device structure 867 * @fctrl: flow control response bus message 868 */ 869 static void mei_hbm_cl_tx_flow_ctrl_creds_res(struct mei_device *dev, 870 struct hbm_flow_control *fctrl) 871 { 872 struct mei_cl *cl; 873 874 if (!fctrl->host_addr) { 875 /* single receive buffer */ 876 mei_hbm_add_single_tx_flow_ctrl_creds(dev, fctrl); 877 return; 878 } 879 880 cl = mei_hbm_cl_find_by_cmd(dev, fctrl); 881 if (cl) { 882 cl->tx_flow_ctrl_creds++; 883 cl_dbg(dev, cl, "flow control creds = %d.\n", 884 cl->tx_flow_ctrl_creds); 885 } 886 } 887 888 889 /** 890 * mei_hbm_cl_disconnect_req - sends disconnect message to fw. 891 * 892 * @dev: the device structure 893 * @cl: a client to disconnect from 894 * 895 * Return: -EIO on write failure 896 */ 897 int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl) 898 { 899 struct hbm_client_connect_request req; 900 901 return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, 902 &req, sizeof(req)); 903 } 904 905 /** 906 * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW 907 * 908 * @dev: the device structure 909 * @cl: a client to disconnect from 910 * 911 * Return: -EIO on write failure 912 */ 913 int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) 914 { 915 struct hbm_client_connect_response resp; 916 917 return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, 918 &resp, sizeof(resp)); 919 } 920 921 /** 922 * mei_hbm_cl_disconnect_res - update the client state according 923 * disconnect response 924 * 925 * @dev: the device structure 926 * @cl: mei host client 927 * @cmd: disconnect client response host bus message 928 */ 929 static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct mei_cl *cl, 930 struct mei_hbm_cl_cmd *cmd) 931 { 932 struct hbm_client_connect_response *rs = 933 (struct hbm_client_connect_response *)cmd; 934 935 cl_dbg(dev, cl, "hbm: disconnect response status=%d\n", rs->status); 936 937 if (rs->status == MEI_CL_DISCONN_SUCCESS) 938 cl->state = MEI_FILE_DISCONNECT_REPLY; 939 cl->status = 0; 940 } 941 942 /** 943 * mei_hbm_cl_connect_req - send connection request to specific me client 944 * 945 * @dev: the device structure 946 * @cl: a client to connect to 947 * 948 * Return: -EIO on write failure 949 */ 950 int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl) 951 { 952 struct hbm_client_connect_request req; 953 954 return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, 955 &req, sizeof(req)); 956 } 957 958 /** 959 * mei_hbm_cl_connect_res - update the client state according 960 * connection response 961 * 962 * @dev: the device structure 963 * @cl: mei host client 964 * @cmd: connect client response host bus message 965 */ 966 static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl, 967 struct mei_hbm_cl_cmd *cmd) 968 { 969 struct hbm_client_connect_response *rs = 970 (struct hbm_client_connect_response *)cmd; 971 972 cl_dbg(dev, cl, "hbm: connect response status=%s\n", 973 mei_cl_conn_status_str(rs->status)); 974 975 if (rs->status == MEI_CL_CONN_SUCCESS) 976 cl->state = MEI_FILE_CONNECTED; 977 else { 978 cl->state = MEI_FILE_DISCONNECT_REPLY; 979 if (rs->status == MEI_CL_CONN_NOT_FOUND) { 980 mei_me_cl_del(dev, cl->me_cl); 981 if (dev->dev_state == MEI_DEV_ENABLED) 982 schedule_work(&dev->bus_rescan_work); 983 } 984 } 985 cl->status = mei_cl_conn_status_to_errno(rs->status); 986 } 987 988 /** 989 * mei_hbm_cl_res - process hbm response received on behalf 990 * an client 991 * 992 * @dev: the device structure 993 * @rs: hbm client message 994 * @fop_type: file operation type 995 */ 996 static void mei_hbm_cl_res(struct mei_device *dev, 997 struct mei_hbm_cl_cmd *rs, 998 enum mei_cb_file_ops fop_type) 999 { 1000 struct mei_cl *cl; 1001 struct mei_cl_cb *cb, *next; 1002 1003 cl = NULL; 1004 list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list, list) { 1005 1006 cl = cb->cl; 1007 1008 if (cb->fop_type != fop_type) 1009 continue; 1010 1011 if (mei_hbm_cl_addr_equal(cl, rs)) { 1012 list_del_init(&cb->list); 1013 break; 1014 } 1015 } 1016 1017 if (!cl) 1018 return; 1019 1020 switch (fop_type) { 1021 case MEI_FOP_CONNECT: 1022 mei_hbm_cl_connect_res(dev, cl, rs); 1023 break; 1024 case MEI_FOP_DISCONNECT: 1025 mei_hbm_cl_disconnect_res(dev, cl, rs); 1026 break; 1027 case MEI_FOP_NOTIFY_START: 1028 mei_hbm_cl_notify_start_res(dev, cl, rs); 1029 break; 1030 case MEI_FOP_NOTIFY_STOP: 1031 mei_hbm_cl_notify_stop_res(dev, cl, rs); 1032 break; 1033 default: 1034 return; 1035 } 1036 1037 cl->timer_count = 0; 1038 wake_up(&cl->wait); 1039 } 1040 1041 1042 /** 1043 * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware 1044 * host sends disconnect response 1045 * 1046 * @dev: the device structure. 1047 * @disconnect_req: disconnect request bus message from the me 1048 * 1049 * Return: -ENOMEM on allocation failure 1050 */ 1051 static int mei_hbm_fw_disconnect_req(struct mei_device *dev, 1052 struct hbm_client_connect_request *disconnect_req) 1053 { 1054 struct mei_cl *cl; 1055 struct mei_cl_cb *cb; 1056 1057 cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req); 1058 if (cl) { 1059 cl_warn(dev, cl, "fw disconnect request received\n"); 1060 cl->state = MEI_FILE_DISCONNECTING; 1061 cl->timer_count = 0; 1062 1063 cb = mei_cl_enqueue_ctrl_wr_cb(cl, 0, MEI_FOP_DISCONNECT_RSP, 1064 NULL); 1065 if (!cb) 1066 return -ENOMEM; 1067 } 1068 return 0; 1069 } 1070 1071 /** 1072 * mei_hbm_pg_enter_res - PG enter response received 1073 * 1074 * @dev: the device structure. 1075 * 1076 * Return: 0 on success, -EPROTO on state mismatch 1077 */ 1078 static int mei_hbm_pg_enter_res(struct mei_device *dev) 1079 { 1080 if (mei_pg_state(dev) != MEI_PG_OFF || 1081 dev->pg_event != MEI_PG_EVENT_WAIT) { 1082 dev_err(dev->dev, "hbm: pg entry response: state mismatch [%s, %d]\n", 1083 mei_pg_state_str(mei_pg_state(dev)), dev->pg_event); 1084 return -EPROTO; 1085 } 1086 1087 dev->pg_event = MEI_PG_EVENT_RECEIVED; 1088 wake_up(&dev->wait_pg); 1089 1090 return 0; 1091 } 1092 1093 /** 1094 * mei_hbm_pg_resume - process with PG resume 1095 * 1096 * @dev: the device structure. 1097 */ 1098 void mei_hbm_pg_resume(struct mei_device *dev) 1099 { 1100 pm_request_resume(dev->dev); 1101 } 1102 EXPORT_SYMBOL_GPL(mei_hbm_pg_resume); 1103 1104 /** 1105 * mei_hbm_pg_exit_res - PG exit response received 1106 * 1107 * @dev: the device structure. 1108 * 1109 * Return: 0 on success, -EPROTO on state mismatch 1110 */ 1111 static int mei_hbm_pg_exit_res(struct mei_device *dev) 1112 { 1113 if (mei_pg_state(dev) != MEI_PG_ON || 1114 (dev->pg_event != MEI_PG_EVENT_WAIT && 1115 dev->pg_event != MEI_PG_EVENT_IDLE)) { 1116 dev_err(dev->dev, "hbm: pg exit response: state mismatch [%s, %d]\n", 1117 mei_pg_state_str(mei_pg_state(dev)), dev->pg_event); 1118 return -EPROTO; 1119 } 1120 1121 switch (dev->pg_event) { 1122 case MEI_PG_EVENT_WAIT: 1123 dev->pg_event = MEI_PG_EVENT_RECEIVED; 1124 wake_up(&dev->wait_pg); 1125 break; 1126 case MEI_PG_EVENT_IDLE: 1127 /* 1128 * If the driver is not waiting on this then 1129 * this is HW initiated exit from PG. 1130 * Start runtime pm resume sequence to exit from PG. 1131 */ 1132 dev->pg_event = MEI_PG_EVENT_RECEIVED; 1133 mei_hbm_pg_resume(dev); 1134 break; 1135 default: 1136 WARN(1, "hbm: pg exit response: unexpected pg event = %d\n", 1137 dev->pg_event); 1138 return -EPROTO; 1139 } 1140 1141 return 0; 1142 } 1143 1144 /** 1145 * mei_hbm_config_features - check what hbm features and commands 1146 * are supported by the fw 1147 * 1148 * @dev: the device structure 1149 */ 1150 static void mei_hbm_config_features(struct mei_device *dev) 1151 { 1152 /* Power Gating Isolation Support */ 1153 dev->hbm_f_pg_supported = 0; 1154 if (dev->version.major_version > HBM_MAJOR_VERSION_PGI) 1155 dev->hbm_f_pg_supported = 1; 1156 1157 if (dev->version.major_version == HBM_MAJOR_VERSION_PGI && 1158 dev->version.minor_version >= HBM_MINOR_VERSION_PGI) 1159 dev->hbm_f_pg_supported = 1; 1160 1161 dev->hbm_f_dc_supported = 0; 1162 if (dev->version.major_version >= HBM_MAJOR_VERSION_DC) 1163 dev->hbm_f_dc_supported = 1; 1164 1165 dev->hbm_f_ie_supported = 0; 1166 if (dev->version.major_version >= HBM_MAJOR_VERSION_IE) 1167 dev->hbm_f_ie_supported = 1; 1168 1169 /* disconnect on connect timeout instead of link reset */ 1170 dev->hbm_f_dot_supported = 0; 1171 if (dev->version.major_version >= HBM_MAJOR_VERSION_DOT) 1172 dev->hbm_f_dot_supported = 1; 1173 1174 /* Notification Event Support */ 1175 dev->hbm_f_ev_supported = 0; 1176 if (dev->version.major_version >= HBM_MAJOR_VERSION_EV) 1177 dev->hbm_f_ev_supported = 1; 1178 1179 /* Fixed Address Client Support */ 1180 dev->hbm_f_fa_supported = 0; 1181 if (dev->version.major_version >= HBM_MAJOR_VERSION_FA) 1182 dev->hbm_f_fa_supported = 1; 1183 1184 /* OS ver message Support */ 1185 dev->hbm_f_os_supported = 0; 1186 if (dev->version.major_version >= HBM_MAJOR_VERSION_OS) 1187 dev->hbm_f_os_supported = 1; 1188 1189 /* DMA Ring Support */ 1190 dev->hbm_f_dr_supported = 0; 1191 if (dev->version.major_version > HBM_MAJOR_VERSION_DR || 1192 (dev->version.major_version == HBM_MAJOR_VERSION_DR && 1193 dev->version.minor_version >= HBM_MINOR_VERSION_DR)) 1194 dev->hbm_f_dr_supported = 1; 1195 1196 /* VTag Support */ 1197 dev->hbm_f_vt_supported = 0; 1198 if (dev->version.major_version > HBM_MAJOR_VERSION_VT || 1199 (dev->version.major_version == HBM_MAJOR_VERSION_VT && 1200 dev->version.minor_version >= HBM_MINOR_VERSION_VT)) 1201 dev->hbm_f_vt_supported = 1; 1202 1203 /* Capability message Support */ 1204 dev->hbm_f_cap_supported = 0; 1205 if (dev->version.major_version > HBM_MAJOR_VERSION_CAP || 1206 (dev->version.major_version == HBM_MAJOR_VERSION_CAP && 1207 dev->version.minor_version >= HBM_MINOR_VERSION_CAP)) 1208 dev->hbm_f_cap_supported = 1; 1209 1210 /* Client DMA Support */ 1211 dev->hbm_f_cd_supported = 0; 1212 if (dev->version.major_version > HBM_MAJOR_VERSION_CD || 1213 (dev->version.major_version == HBM_MAJOR_VERSION_CD && 1214 dev->version.minor_version >= HBM_MINOR_VERSION_CD)) 1215 dev->hbm_f_cd_supported = 1; 1216 } 1217 1218 /** 1219 * mei_hbm_version_is_supported - checks whether the driver can 1220 * support the hbm version of the device 1221 * 1222 * @dev: the device structure 1223 * Return: true if driver can support hbm version of the device 1224 */ 1225 bool mei_hbm_version_is_supported(struct mei_device *dev) 1226 { 1227 return (dev->version.major_version < HBM_MAJOR_VERSION) || 1228 (dev->version.major_version == HBM_MAJOR_VERSION && 1229 dev->version.minor_version <= HBM_MINOR_VERSION); 1230 } 1231 1232 /** 1233 * mei_hbm_dispatch - bottom half read routine after ISR to 1234 * handle the read bus message cmd processing. 1235 * 1236 * @dev: the device structure 1237 * @hdr: header of bus message 1238 * 1239 * Return: 0 on success and < 0 on failure 1240 */ 1241 int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) 1242 { 1243 struct mei_bus_message *mei_msg; 1244 struct hbm_host_version_response *version_res; 1245 struct hbm_props_response *props_res; 1246 struct hbm_host_enum_response *enum_res; 1247 struct hbm_dma_setup_response *dma_setup_res; 1248 struct hbm_add_client_request *add_cl_req; 1249 struct hbm_capability_response *capability_res; 1250 int ret; 1251 1252 struct mei_hbm_cl_cmd *cl_cmd; 1253 struct hbm_client_connect_request *disconnect_req; 1254 struct hbm_flow_control *fctrl; 1255 struct hbm_client_dma_response *client_dma_res; 1256 1257 /* read the message to our buffer */ 1258 BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); 1259 mei_read_slots(dev, dev->rd_msg_buf, hdr->length); 1260 mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; 1261 cl_cmd = (struct mei_hbm_cl_cmd *)mei_msg; 1262 1263 /* ignore spurious message and prevent reset nesting 1264 * hbm is put to idle during system reset 1265 */ 1266 if (dev->hbm_state == MEI_HBM_IDLE) { 1267 dev_dbg(dev->dev, "hbm: state is idle ignore spurious messages\n"); 1268 return 0; 1269 } 1270 1271 switch (mei_msg->hbm_cmd) { 1272 case HOST_START_RES_CMD: 1273 dev_dbg(dev->dev, "hbm: start: response message received.\n"); 1274 1275 dev->init_clients_timer = 0; 1276 1277 version_res = (struct hbm_host_version_response *)mei_msg; 1278 1279 dev_dbg(dev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", 1280 HBM_MAJOR_VERSION, HBM_MINOR_VERSION, 1281 version_res->me_max_version.major_version, 1282 version_res->me_max_version.minor_version); 1283 1284 if (version_res->host_version_supported) { 1285 dev->version.major_version = HBM_MAJOR_VERSION; 1286 dev->version.minor_version = HBM_MINOR_VERSION; 1287 } else { 1288 dev->version.major_version = 1289 version_res->me_max_version.major_version; 1290 dev->version.minor_version = 1291 version_res->me_max_version.minor_version; 1292 } 1293 1294 if (!mei_hbm_version_is_supported(dev)) { 1295 dev_warn(dev->dev, "hbm: start: version mismatch - stopping the driver.\n"); 1296 1297 dev->hbm_state = MEI_HBM_STOPPED; 1298 if (mei_hbm_stop_req(dev)) { 1299 dev_err(dev->dev, "hbm: start: failed to send stop request\n"); 1300 return -EIO; 1301 } 1302 break; 1303 } 1304 1305 mei_hbm_config_features(dev); 1306 1307 if (dev->dev_state != MEI_DEV_INIT_CLIENTS || 1308 dev->hbm_state != MEI_HBM_STARTING) { 1309 if (dev->dev_state == MEI_DEV_POWER_DOWN || 1310 dev->dev_state == MEI_DEV_POWERING_DOWN) { 1311 dev_dbg(dev->dev, "hbm: start: on shutdown, ignoring\n"); 1312 return 0; 1313 } 1314 dev_err(dev->dev, "hbm: start: state mismatch, [%d, %d]\n", 1315 dev->dev_state, dev->hbm_state); 1316 return -EPROTO; 1317 } 1318 1319 if (dev->hbm_f_cap_supported) { 1320 if (mei_hbm_capabilities_req(dev)) 1321 return -EIO; 1322 wake_up(&dev->wait_hbm_start); 1323 break; 1324 } 1325 1326 if (dev->hbm_f_dr_supported) { 1327 if (mei_dmam_ring_alloc(dev)) 1328 dev_info(dev->dev, "running w/o dma ring\n"); 1329 if (mei_dma_ring_is_allocated(dev)) { 1330 if (mei_hbm_dma_setup_req(dev)) 1331 return -EIO; 1332 1333 wake_up(&dev->wait_hbm_start); 1334 break; 1335 } 1336 } 1337 1338 dev->hbm_f_dr_supported = 0; 1339 mei_dmam_ring_free(dev); 1340 1341 if (mei_hbm_enum_clients_req(dev)) 1342 return -EIO; 1343 1344 wake_up(&dev->wait_hbm_start); 1345 break; 1346 1347 case MEI_HBM_CAPABILITIES_RES_CMD: 1348 dev_dbg(dev->dev, "hbm: capabilities response: message received.\n"); 1349 1350 dev->init_clients_timer = 0; 1351 1352 if (dev->dev_state != MEI_DEV_INIT_CLIENTS || 1353 dev->hbm_state != MEI_HBM_CAP_SETUP) { 1354 if (dev->dev_state == MEI_DEV_POWER_DOWN || 1355 dev->dev_state == MEI_DEV_POWERING_DOWN) { 1356 dev_dbg(dev->dev, "hbm: capabilities response: on shutdown, ignoring\n"); 1357 return 0; 1358 } 1359 dev_err(dev->dev, "hbm: capabilities response: state mismatch, [%d, %d]\n", 1360 dev->dev_state, dev->hbm_state); 1361 return -EPROTO; 1362 } 1363 1364 capability_res = (struct hbm_capability_response *)mei_msg; 1365 if (!(capability_res->capability_granted[0] & HBM_CAP_VT)) 1366 dev->hbm_f_vt_supported = 0; 1367 if (!(capability_res->capability_granted[0] & HBM_CAP_CD)) 1368 dev->hbm_f_cd_supported = 0; 1369 1370 if (dev->hbm_f_dr_supported) { 1371 if (mei_dmam_ring_alloc(dev)) 1372 dev_info(dev->dev, "running w/o dma ring\n"); 1373 if (mei_dma_ring_is_allocated(dev)) { 1374 if (mei_hbm_dma_setup_req(dev)) 1375 return -EIO; 1376 break; 1377 } 1378 } 1379 1380 dev->hbm_f_dr_supported = 0; 1381 mei_dmam_ring_free(dev); 1382 1383 if (mei_hbm_enum_clients_req(dev)) 1384 return -EIO; 1385 break; 1386 1387 case MEI_HBM_DMA_SETUP_RES_CMD: 1388 dev_dbg(dev->dev, "hbm: dma setup response: message received.\n"); 1389 1390 dev->init_clients_timer = 0; 1391 1392 if (dev->dev_state != MEI_DEV_INIT_CLIENTS || 1393 dev->hbm_state != MEI_HBM_DR_SETUP) { 1394 if (dev->dev_state == MEI_DEV_POWER_DOWN || 1395 dev->dev_state == MEI_DEV_POWERING_DOWN) { 1396 dev_dbg(dev->dev, "hbm: dma setup response: on shutdown, ignoring\n"); 1397 return 0; 1398 } 1399 dev_err(dev->dev, "hbm: dma setup response: state mismatch, [%d, %d]\n", 1400 dev->dev_state, dev->hbm_state); 1401 return -EPROTO; 1402 } 1403 1404 dma_setup_res = (struct hbm_dma_setup_response *)mei_msg; 1405 1406 if (dma_setup_res->status) { 1407 u8 status = dma_setup_res->status; 1408 1409 if (status == MEI_HBMS_NOT_ALLOWED) { 1410 dev_dbg(dev->dev, "hbm: dma setup not allowed\n"); 1411 } else { 1412 dev_info(dev->dev, "hbm: dma setup response: failure = %d %s\n", 1413 status, 1414 mei_hbm_status_str(status)); 1415 } 1416 dev->hbm_f_dr_supported = 0; 1417 mei_dmam_ring_free(dev); 1418 } 1419 1420 if (mei_hbm_enum_clients_req(dev)) 1421 return -EIO; 1422 break; 1423 1424 case CLIENT_CONNECT_RES_CMD: 1425 dev_dbg(dev->dev, "hbm: client connect response: message received.\n"); 1426 mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT); 1427 break; 1428 1429 case CLIENT_DISCONNECT_RES_CMD: 1430 dev_dbg(dev->dev, "hbm: client disconnect response: message received.\n"); 1431 mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT); 1432 break; 1433 1434 case MEI_FLOW_CONTROL_CMD: 1435 dev_dbg(dev->dev, "hbm: client flow control response: message received.\n"); 1436 1437 fctrl = (struct hbm_flow_control *)mei_msg; 1438 mei_hbm_cl_tx_flow_ctrl_creds_res(dev, fctrl); 1439 break; 1440 1441 case MEI_PG_ISOLATION_ENTRY_RES_CMD: 1442 dev_dbg(dev->dev, "hbm: power gate isolation entry response received\n"); 1443 ret = mei_hbm_pg_enter_res(dev); 1444 if (ret) 1445 return ret; 1446 break; 1447 1448 case MEI_PG_ISOLATION_EXIT_REQ_CMD: 1449 dev_dbg(dev->dev, "hbm: power gate isolation exit request received\n"); 1450 ret = mei_hbm_pg_exit_res(dev); 1451 if (ret) 1452 return ret; 1453 break; 1454 1455 case HOST_CLIENT_PROPERTIES_RES_CMD: 1456 dev_dbg(dev->dev, "hbm: properties response: message received.\n"); 1457 1458 dev->init_clients_timer = 0; 1459 1460 if (dev->dev_state != MEI_DEV_INIT_CLIENTS || 1461 dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { 1462 if (dev->dev_state == MEI_DEV_POWER_DOWN || 1463 dev->dev_state == MEI_DEV_POWERING_DOWN) { 1464 dev_dbg(dev->dev, "hbm: properties response: on shutdown, ignoring\n"); 1465 return 0; 1466 } 1467 dev_err(dev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", 1468 dev->dev_state, dev->hbm_state); 1469 return -EPROTO; 1470 } 1471 1472 props_res = (struct hbm_props_response *)mei_msg; 1473 1474 if (props_res->status == MEI_HBMS_CLIENT_NOT_FOUND) { 1475 dev_dbg(dev->dev, "hbm: properties response: %d CLIENT_NOT_FOUND\n", 1476 props_res->me_addr); 1477 } else if (props_res->status) { 1478 dev_err(dev->dev, "hbm: properties response: wrong status = %d %s\n", 1479 props_res->status, 1480 mei_hbm_status_str(props_res->status)); 1481 return -EPROTO; 1482 } else { 1483 mei_hbm_me_cl_add(dev, props_res); 1484 } 1485 1486 /* request property for the next client */ 1487 if (mei_hbm_prop_req(dev, props_res->me_addr + 1)) 1488 return -EIO; 1489 1490 break; 1491 1492 case HOST_ENUM_RES_CMD: 1493 dev_dbg(dev->dev, "hbm: enumeration response: message received\n"); 1494 1495 dev->init_clients_timer = 0; 1496 1497 enum_res = (struct hbm_host_enum_response *) mei_msg; 1498 BUILD_BUG_ON(sizeof(dev->me_clients_map) 1499 < sizeof(enum_res->valid_addresses)); 1500 memcpy(dev->me_clients_map, enum_res->valid_addresses, 1501 sizeof(enum_res->valid_addresses)); 1502 1503 if (dev->dev_state != MEI_DEV_INIT_CLIENTS || 1504 dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { 1505 if (dev->dev_state == MEI_DEV_POWER_DOWN || 1506 dev->dev_state == MEI_DEV_POWERING_DOWN) { 1507 dev_dbg(dev->dev, "hbm: enumeration response: on shutdown, ignoring\n"); 1508 return 0; 1509 } 1510 dev_err(dev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", 1511 dev->dev_state, dev->hbm_state); 1512 return -EPROTO; 1513 } 1514 1515 dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; 1516 1517 /* first property request */ 1518 if (mei_hbm_prop_req(dev, 0)) 1519 return -EIO; 1520 1521 break; 1522 1523 case HOST_STOP_RES_CMD: 1524 dev_dbg(dev->dev, "hbm: stop response: message received\n"); 1525 1526 dev->init_clients_timer = 0; 1527 1528 if (dev->hbm_state != MEI_HBM_STOPPED) { 1529 dev_err(dev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", 1530 dev->dev_state, dev->hbm_state); 1531 return -EPROTO; 1532 } 1533 1534 mei_set_devstate(dev, MEI_DEV_POWER_DOWN); 1535 dev_info(dev->dev, "hbm: stop response: resetting.\n"); 1536 /* force the reset */ 1537 return -EPROTO; 1538 1539 case CLIENT_DISCONNECT_REQ_CMD: 1540 dev_dbg(dev->dev, "hbm: disconnect request: message received\n"); 1541 1542 disconnect_req = (struct hbm_client_connect_request *)mei_msg; 1543 mei_hbm_fw_disconnect_req(dev, disconnect_req); 1544 break; 1545 1546 case ME_STOP_REQ_CMD: 1547 dev_dbg(dev->dev, "hbm: stop request: message received\n"); 1548 dev->hbm_state = MEI_HBM_STOPPED; 1549 if (mei_hbm_stop_req(dev)) { 1550 dev_err(dev->dev, "hbm: stop request: failed to send stop request\n"); 1551 return -EIO; 1552 } 1553 break; 1554 1555 case MEI_HBM_ADD_CLIENT_REQ_CMD: 1556 dev_dbg(dev->dev, "hbm: add client request received\n"); 1557 /* 1558 * after the host receives the enum_resp 1559 * message clients may be added or removed 1560 */ 1561 if (dev->hbm_state <= MEI_HBM_ENUM_CLIENTS || 1562 dev->hbm_state >= MEI_HBM_STOPPED) { 1563 dev_err(dev->dev, "hbm: add client: state mismatch, [%d, %d]\n", 1564 dev->dev_state, dev->hbm_state); 1565 return -EPROTO; 1566 } 1567 add_cl_req = (struct hbm_add_client_request *)mei_msg; 1568 ret = mei_hbm_fw_add_cl_req(dev, add_cl_req); 1569 if (ret) { 1570 dev_err(dev->dev, "hbm: add client: failed to send response %d\n", 1571 ret); 1572 return -EIO; 1573 } 1574 dev_dbg(dev->dev, "hbm: add client request processed\n"); 1575 break; 1576 1577 case MEI_HBM_NOTIFY_RES_CMD: 1578 dev_dbg(dev->dev, "hbm: notify response received\n"); 1579 mei_hbm_cl_res(dev, cl_cmd, notify_res_to_fop(cl_cmd)); 1580 break; 1581 1582 case MEI_HBM_NOTIFICATION_CMD: 1583 dev_dbg(dev->dev, "hbm: notification\n"); 1584 mei_hbm_cl_notify(dev, cl_cmd); 1585 break; 1586 1587 case MEI_HBM_CLIENT_DMA_MAP_RES_CMD: 1588 dev_dbg(dev->dev, "hbm: client dma map response: message received.\n"); 1589 client_dma_res = (struct hbm_client_dma_response *)mei_msg; 1590 mei_hbm_cl_dma_map_res(dev, client_dma_res); 1591 break; 1592 1593 case MEI_HBM_CLIENT_DMA_UNMAP_RES_CMD: 1594 dev_dbg(dev->dev, "hbm: client dma unmap response: message received.\n"); 1595 client_dma_res = (struct hbm_client_dma_response *)mei_msg; 1596 mei_hbm_cl_dma_unmap_res(dev, client_dma_res); 1597 break; 1598 1599 default: 1600 WARN(1, "hbm: wrong command %d\n", mei_msg->hbm_cmd); 1601 return -EPROTO; 1602 1603 } 1604 return 0; 1605 } 1606 1607