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 #ifndef _MEI_DEV_H_ 18 #define _MEI_DEV_H_ 19 20 #include <linux/types.h> 21 #include <linux/watchdog.h> 22 #include <linux/poll.h> 23 #include <linux/mei.h> 24 #include <linux/mei_cl_bus.h> 25 26 #include "hw.h" 27 #include "hbm.h" 28 29 /* 30 * watch dog definition 31 */ 32 #define MEI_WD_HDR_SIZE 4 33 #define MEI_WD_STOP_MSG_SIZE MEI_WD_HDR_SIZE 34 #define MEI_WD_START_MSG_SIZE (MEI_WD_HDR_SIZE + 16) 35 36 #define MEI_WD_DEFAULT_TIMEOUT 120 /* seconds */ 37 #define MEI_WD_MIN_TIMEOUT 120 /* seconds */ 38 #define MEI_WD_MAX_TIMEOUT 65535 /* seconds */ 39 40 #define MEI_WD_STOP_TIMEOUT 10 /* msecs */ 41 42 #define MEI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0) 43 44 #define MEI_RD_MSG_BUF_SIZE (128 * sizeof(u32)) 45 46 47 /* 48 * AMTHI Client UUID 49 */ 50 extern const uuid_le mei_amthif_guid; 51 52 /* 53 * Watchdog Client UUID 54 */ 55 extern const uuid_le mei_wd_guid; 56 57 /* 58 * Number of Maximum MEI Clients 59 */ 60 #define MEI_CLIENTS_MAX 256 61 62 /* 63 * maximum number of consecutive resets 64 */ 65 #define MEI_MAX_CONSEC_RESET 3 66 67 /* 68 * Number of File descriptors/handles 69 * that can be opened to the driver. 70 * 71 * Limit to 255: 256 Total Clients 72 * minus internal client for MEI Bus Messages 73 */ 74 #define MEI_MAX_OPEN_HANDLE_COUNT (MEI_CLIENTS_MAX - 1) 75 76 /* 77 * Internal Clients Number 78 */ 79 #define MEI_HOST_CLIENT_ID_ANY (-1) 80 #define MEI_HBM_HOST_CLIENT_ID 0 /* not used, just for documentation */ 81 #define MEI_WD_HOST_CLIENT_ID 1 82 #define MEI_IAMTHIF_HOST_CLIENT_ID 2 83 84 85 /* File state */ 86 enum file_state { 87 MEI_FILE_INITIALIZING = 0, 88 MEI_FILE_CONNECTING, 89 MEI_FILE_CONNECTED, 90 MEI_FILE_DISCONNECTING, 91 MEI_FILE_DISCONNECTED 92 }; 93 94 /* MEI device states */ 95 enum mei_dev_state { 96 MEI_DEV_INITIALIZING = 0, 97 MEI_DEV_INIT_CLIENTS, 98 MEI_DEV_ENABLED, 99 MEI_DEV_RESETTING, 100 MEI_DEV_DISABLED, 101 MEI_DEV_POWER_DOWN, 102 MEI_DEV_POWER_UP 103 }; 104 105 const char *mei_dev_state_str(int state); 106 107 enum iamthif_states { 108 MEI_IAMTHIF_IDLE, 109 MEI_IAMTHIF_WRITING, 110 MEI_IAMTHIF_FLOW_CONTROL, 111 MEI_IAMTHIF_READING, 112 MEI_IAMTHIF_READ_COMPLETE 113 }; 114 115 enum mei_file_transaction_states { 116 MEI_IDLE, 117 MEI_WRITING, 118 MEI_WRITE_COMPLETE, 119 MEI_FLOW_CONTROL, 120 MEI_READING, 121 MEI_READ_COMPLETE 122 }; 123 124 enum mei_wd_states { 125 MEI_WD_IDLE, 126 MEI_WD_RUNNING, 127 MEI_WD_STOPPING, 128 }; 129 130 /** 131 * enum mei_cb_file_ops - file operation associated with the callback 132 * @MEI_FOP_READ - read 133 * @MEI_FOP_WRITE - write 134 * @MEI_FOP_CONNECT - connect 135 * @MEI_FOP_DISCONNECT_RSP - disconnect response 136 * @MEI_FOP_OPEN - open 137 * @MEI_FOP_CLOSE - close 138 */ 139 enum mei_cb_file_ops { 140 MEI_FOP_READ = 0, 141 MEI_FOP_WRITE, 142 MEI_FOP_CONNECT, 143 MEI_FOP_DISCONNECT_RSP, 144 MEI_FOP_OPEN, 145 MEI_FOP_CLOSE 146 }; 147 148 /* 149 * Intel MEI message data struct 150 */ 151 struct mei_msg_data { 152 u32 size; 153 unsigned char *data; 154 }; 155 156 /* Maximum number of processed FW status registers */ 157 #define MEI_FW_STATUS_MAX 2 158 159 /* 160 * struct mei_fw_status - storage of FW status data 161 * 162 * @count - number of actually available elements in array 163 * @status - FW status registers 164 */ 165 struct mei_fw_status { 166 int count; 167 u32 status[MEI_FW_STATUS_MAX]; 168 }; 169 170 /** 171 * struct mei_me_client - representation of me (fw) client 172 * 173 * @props - client properties 174 * @client_id - me client id 175 * @mei_flow_ctrl_creds - flow control credits 176 */ 177 struct mei_me_client { 178 struct mei_client_properties props; 179 u8 client_id; 180 u8 mei_flow_ctrl_creds; 181 }; 182 183 184 struct mei_cl; 185 186 /** 187 * struct mei_cl_cb - file operation callback structure 188 * 189 * @cl - file client who is running this operation 190 * @fop_type - file operation type 191 */ 192 struct mei_cl_cb { 193 struct list_head list; 194 struct mei_cl *cl; 195 enum mei_cb_file_ops fop_type; 196 struct mei_msg_data request_buffer; 197 struct mei_msg_data response_buffer; 198 unsigned long buf_idx; 199 unsigned long read_time; 200 struct file *file_object; 201 u32 internal:1; 202 }; 203 204 /* MEI client instance carried as file->private_data*/ 205 struct mei_cl { 206 struct list_head link; 207 struct mei_device *dev; 208 enum file_state state; 209 wait_queue_head_t tx_wait; 210 wait_queue_head_t rx_wait; 211 wait_queue_head_t wait; 212 int status; 213 /* ID of client connected */ 214 u8 host_client_id; 215 u8 me_client_id; 216 u8 mei_flow_ctrl_creds; 217 u8 timer_count; 218 enum mei_file_transaction_states reading_state; 219 enum mei_file_transaction_states writing_state; 220 struct mei_cl_cb *read_cb; 221 222 /* MEI CL bus data */ 223 struct mei_cl_device *device; 224 struct list_head device_link; 225 uuid_le device_uuid; 226 }; 227 228 /** struct mei_hw_ops 229 * 230 * @fw_status - read FW status from PCI config space 231 * @host_is_ready - query for host readiness 232 233 * @hw_is_ready - query if hw is ready 234 * @hw_reset - reset hw 235 * @hw_start - start hw after reset 236 * @hw_config - configure hw 237 238 * @pg_state - power gating state of the device 239 * @pg_is_enabled - is power gating enabled 240 241 * @intr_clear - clear pending interrupts 242 * @intr_enable - enable interrupts 243 * @intr_disable - disable interrupts 244 245 * @hbuf_free_slots - query for write buffer empty slots 246 * @hbuf_is_ready - query if write buffer is empty 247 * @hbuf_max_len - query for write buffer max len 248 249 * @write - write a message to FW 250 251 * @rdbuf_full_slots - query how many slots are filled 252 253 * @read_hdr - get first 4 bytes (header) 254 * @read - read a buffer from the FW 255 */ 256 struct mei_hw_ops { 257 258 int (*fw_status)(struct mei_device *dev, 259 struct mei_fw_status *fw_status); 260 bool (*host_is_ready)(struct mei_device *dev); 261 262 bool (*hw_is_ready)(struct mei_device *dev); 263 int (*hw_reset)(struct mei_device *dev, bool enable); 264 int (*hw_start)(struct mei_device *dev); 265 void (*hw_config)(struct mei_device *dev); 266 267 enum mei_pg_state (*pg_state)(struct mei_device *dev); 268 bool (*pg_is_enabled)(struct mei_device *dev); 269 270 void (*intr_clear)(struct mei_device *dev); 271 void (*intr_enable)(struct mei_device *dev); 272 void (*intr_disable)(struct mei_device *dev); 273 274 int (*hbuf_free_slots)(struct mei_device *dev); 275 bool (*hbuf_is_ready)(struct mei_device *dev); 276 size_t (*hbuf_max_len)(const struct mei_device *dev); 277 278 int (*write)(struct mei_device *dev, 279 struct mei_msg_hdr *hdr, 280 unsigned char *buf); 281 282 int (*rdbuf_full_slots)(struct mei_device *dev); 283 284 u32 (*read_hdr)(const struct mei_device *dev); 285 int (*read)(struct mei_device *dev, 286 unsigned char *buf, unsigned long len); 287 }; 288 289 /* MEI bus API*/ 290 291 /** 292 * struct mei_cl_ops - MEI CL device ops 293 * This structure allows ME host clients to implement technology 294 * specific operations. 295 * 296 * @enable: Enable an MEI CL device. Some devices require specific 297 * HECI commands to initialize completely. 298 * @disable: Disable an MEI CL device. 299 * @send: Tx hook for the device. This allows ME host clients to trap 300 * the device driver buffers before actually physically 301 * pushing it to the ME. 302 * @recv: Rx hook for the device. This allows ME host clients to trap the 303 * ME buffers before forwarding them to the device driver. 304 */ 305 struct mei_cl_ops { 306 int (*enable)(struct mei_cl_device *device); 307 int (*disable)(struct mei_cl_device *device); 308 int (*send)(struct mei_cl_device *device, u8 *buf, size_t length); 309 int (*recv)(struct mei_cl_device *device, u8 *buf, size_t length); 310 }; 311 312 struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, 313 uuid_le uuid, char *name, 314 struct mei_cl_ops *ops); 315 void mei_cl_remove_device(struct mei_cl_device *device); 316 317 int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length); 318 int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length); 319 int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length); 320 void mei_cl_bus_rx_event(struct mei_cl *cl); 321 void mei_cl_bus_remove_devices(struct mei_device *dev); 322 int mei_cl_bus_init(void); 323 void mei_cl_bus_exit(void); 324 325 326 /** 327 * struct mei_cl_device - MEI device handle 328 * An mei_cl_device pointer is returned from mei_add_device() 329 * and links MEI bus clients to their actual ME host client pointer. 330 * Drivers for MEI devices will get an mei_cl_device pointer 331 * when being probed and shall use it for doing ME bus I/O. 332 * 333 * @dev: linux driver model device pointer 334 * @uuid: me client uuid 335 * @cl: mei client 336 * @ops: ME transport ops 337 * @event_cb: Drivers register this callback to get asynchronous ME 338 * events (e.g. Rx buffer pending) notifications. 339 * @events: Events bitmask sent to the driver. 340 * @priv_data: client private data 341 */ 342 struct mei_cl_device { 343 struct device dev; 344 345 struct mei_cl *cl; 346 347 const struct mei_cl_ops *ops; 348 349 struct work_struct event_work; 350 mei_cl_event_cb_t event_cb; 351 void *event_context; 352 unsigned long events; 353 354 void *priv_data; 355 }; 356 357 358 /** 359 * enum mei_pg_event - power gating transition events 360 * 361 * @MEI_PG_EVENT_IDLE: the driver is not in power gating transition 362 * @MEI_PG_EVENT_WAIT: the driver is waiting for a pg event to complete 363 * @MEI_PG_EVENT_RECEIVED: the driver received pg event 364 */ 365 enum mei_pg_event { 366 MEI_PG_EVENT_IDLE, 367 MEI_PG_EVENT_WAIT, 368 MEI_PG_EVENT_RECEIVED, 369 }; 370 371 /** 372 * enum mei_pg_state - device internal power gating state 373 * 374 * @MEI_PG_OFF: device is not power gated - it is active 375 * @MEI_PG_ON: device is power gated - it is in lower power state 376 */ 377 enum mei_pg_state { 378 MEI_PG_OFF = 0, 379 MEI_PG_ON = 1, 380 }; 381 382 /* 383 * mei_cfg 384 * 385 * @fw_status - FW status 386 * @quirk_probe - device exclusion quirk 387 */ 388 struct mei_cfg { 389 const struct mei_fw_status fw_status; 390 bool (*quirk_probe)(struct pci_dev *pdev); 391 }; 392 393 394 #define MEI_PCI_DEVICE(dev, cfg) \ 395 .vendor = PCI_VENDOR_ID_INTEL, .device = (dev), \ 396 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, \ 397 .driver_data = (kernel_ulong_t)&(cfg) 398 399 400 /** 401 * struct mei_device - MEI private device struct 402 403 * @reset_count - limits the number of consecutive resets 404 * @hbm_state - state of host bus message protocol 405 * @pg_event - power gating event 406 * @mem_addr - mem mapped base register address 407 408 * @hbuf_depth - depth of hardware host/write buffer is slots 409 * @hbuf_is_ready - query if the host host/write buffer is ready 410 * @wr_msg - the buffer for hbm control messages 411 * @cfg - per device generation config and ops 412 */ 413 struct mei_device { 414 struct pci_dev *pdev; /* pointer to pci device struct */ 415 /* 416 * lists of queues 417 */ 418 /* array of pointers to aio lists */ 419 struct mei_cl_cb read_list; /* driver read queue */ 420 struct mei_cl_cb write_list; /* driver write queue */ 421 struct mei_cl_cb write_waiting_list; /* write waiting queue */ 422 struct mei_cl_cb ctrl_wr_list; /* managed write IOCTL list */ 423 struct mei_cl_cb ctrl_rd_list; /* managed read IOCTL list */ 424 425 /* 426 * list of files 427 */ 428 struct list_head file_list; 429 long open_handle_count; 430 431 /* 432 * lock for the device 433 */ 434 struct mutex device_lock; /* device lock */ 435 struct delayed_work timer_work; /* MEI timer delayed work (timeouts) */ 436 437 bool recvd_hw_ready; 438 /* 439 * waiting queue for receive message from FW 440 */ 441 wait_queue_head_t wait_hw_ready; 442 wait_queue_head_t wait_pg; 443 wait_queue_head_t wait_recvd_msg; 444 wait_queue_head_t wait_stop_wd; 445 446 /* 447 * mei device states 448 */ 449 unsigned long reset_count; 450 enum mei_dev_state dev_state; 451 enum mei_hbm_state hbm_state; 452 u16 init_clients_timer; 453 454 /* 455 * Power Gating support 456 */ 457 enum mei_pg_event pg_event; 458 #ifdef CONFIG_PM_RUNTIME 459 struct dev_pm_domain pg_domain; 460 #endif /* CONFIG_PM_RUNTIME */ 461 462 unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; /* control messages */ 463 u32 rd_msg_hdr; 464 465 /* write buffer */ 466 u8 hbuf_depth; 467 bool hbuf_is_ready; 468 469 /* used for control messages */ 470 struct { 471 struct mei_msg_hdr hdr; 472 unsigned char data[128]; 473 } wr_msg; 474 475 struct hbm_version version; 476 477 struct mei_me_client *me_clients; /* Note: memory has to be allocated */ 478 DECLARE_BITMAP(me_clients_map, MEI_CLIENTS_MAX); 479 DECLARE_BITMAP(host_clients_map, MEI_CLIENTS_MAX); 480 unsigned long me_clients_num; 481 unsigned long me_client_presentation_num; 482 unsigned long me_client_index; 483 484 struct mei_cl wd_cl; 485 enum mei_wd_states wd_state; 486 bool wd_pending; 487 u16 wd_timeout; 488 unsigned char wd_data[MEI_WD_START_MSG_SIZE]; 489 490 491 /* amthif list for cmd waiting */ 492 struct mei_cl_cb amthif_cmd_list; 493 /* driver managed amthif list for reading completed amthif cmd data */ 494 struct mei_cl_cb amthif_rd_complete_list; 495 struct file *iamthif_file_object; 496 struct mei_cl iamthif_cl; 497 struct mei_cl_cb *iamthif_current_cb; 498 long iamthif_open_count; 499 int iamthif_mtu; 500 unsigned long iamthif_timer; 501 u32 iamthif_stall_timer; 502 unsigned char *iamthif_msg_buf; /* Note: memory has to be allocated */ 503 u32 iamthif_msg_buf_size; 504 u32 iamthif_msg_buf_index; 505 enum iamthif_states iamthif_state; 506 bool iamthif_flow_control_pending; 507 bool iamthif_ioctl; 508 bool iamthif_canceled; 509 510 struct work_struct init_work; 511 struct work_struct reset_work; 512 513 /* List of bus devices */ 514 struct list_head device_list; 515 516 #if IS_ENABLED(CONFIG_DEBUG_FS) 517 struct dentry *dbgfs_dir; 518 #endif /* CONFIG_DEBUG_FS */ 519 520 521 const struct mei_hw_ops *ops; 522 const struct mei_cfg *cfg; 523 char hw[0] __aligned(sizeof(void *)); 524 }; 525 526 static inline unsigned long mei_secs_to_jiffies(unsigned long sec) 527 { 528 return msecs_to_jiffies(sec * MSEC_PER_SEC); 529 } 530 531 /** 532 * mei_data2slots - get slots - number of (dwords) from a message length 533 * + size of the mei header 534 * @length - size of the messages in bytes 535 * returns - number of slots 536 */ 537 static inline u32 mei_data2slots(size_t length) 538 { 539 return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4); 540 } 541 542 /** 543 * mei_slots2data- get data in slots - bytes from slots 544 * @slots - number of available slots 545 * returns - number of bytes in slots 546 */ 547 static inline u32 mei_slots2data(int slots) 548 { 549 return slots * 4; 550 } 551 552 /* 553 * mei init function prototypes 554 */ 555 void mei_device_init(struct mei_device *dev, const struct mei_cfg *cfg); 556 int mei_reset(struct mei_device *dev); 557 int mei_start(struct mei_device *dev); 558 int mei_restart(struct mei_device *dev); 559 void mei_stop(struct mei_device *dev); 560 void mei_cancel_work(struct mei_device *dev); 561 562 /* 563 * MEI interrupt functions prototype 564 */ 565 566 void mei_timer(struct work_struct *work); 567 int mei_irq_read_handler(struct mei_device *dev, 568 struct mei_cl_cb *cmpl_list, s32 *slots); 569 570 int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); 571 void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); 572 573 /* 574 * AMTHIF - AMT Host Interface Functions 575 */ 576 void mei_amthif_reset_params(struct mei_device *dev); 577 578 int mei_amthif_host_init(struct mei_device *dev); 579 580 int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *priv_cb); 581 582 int mei_amthif_read(struct mei_device *dev, struct file *file, 583 char __user *ubuf, size_t length, loff_t *offset); 584 585 unsigned int mei_amthif_poll(struct mei_device *dev, 586 struct file *file, poll_table *wait); 587 588 int mei_amthif_release(struct mei_device *dev, struct file *file); 589 590 struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev, 591 struct file *file); 592 593 void mei_amthif_run_next_cmd(struct mei_device *dev); 594 595 int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, 596 struct mei_cl_cb *cmpl_list); 597 598 void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb); 599 int mei_amthif_irq_read_msg(struct mei_device *dev, 600 struct mei_msg_hdr *mei_hdr, 601 struct mei_cl_cb *complete_list); 602 int mei_amthif_irq_read(struct mei_device *dev, s32 *slots); 603 604 /* 605 * NFC functions 606 */ 607 int mei_nfc_host_init(struct mei_device *dev); 608 void mei_nfc_host_exit(struct mei_device *dev); 609 610 /* 611 * NFC Client UUID 612 */ 613 extern const uuid_le mei_nfc_guid; 614 615 int mei_wd_send(struct mei_device *dev); 616 int mei_wd_stop(struct mei_device *dev); 617 int mei_wd_host_init(struct mei_device *dev); 618 /* 619 * mei_watchdog_register - Registering watchdog interface 620 * once we got connection to the WD Client 621 * @dev - mei device 622 */ 623 int mei_watchdog_register(struct mei_device *dev); 624 /* 625 * mei_watchdog_unregister - Unregistering watchdog interface 626 * @dev - mei device 627 */ 628 void mei_watchdog_unregister(struct mei_device *dev); 629 630 /* 631 * Register Access Function 632 */ 633 634 635 static inline void mei_hw_config(struct mei_device *dev) 636 { 637 dev->ops->hw_config(dev); 638 } 639 640 static inline enum mei_pg_state mei_pg_state(struct mei_device *dev) 641 { 642 return dev->ops->pg_state(dev); 643 } 644 645 static inline bool mei_pg_is_enabled(struct mei_device *dev) 646 { 647 return dev->ops->pg_is_enabled(dev); 648 } 649 650 static inline int mei_hw_reset(struct mei_device *dev, bool enable) 651 { 652 return dev->ops->hw_reset(dev, enable); 653 } 654 655 static inline int mei_hw_start(struct mei_device *dev) 656 { 657 return dev->ops->hw_start(dev); 658 } 659 660 static inline void mei_clear_interrupts(struct mei_device *dev) 661 { 662 dev->ops->intr_clear(dev); 663 } 664 665 static inline void mei_enable_interrupts(struct mei_device *dev) 666 { 667 dev->ops->intr_enable(dev); 668 } 669 670 static inline void mei_disable_interrupts(struct mei_device *dev) 671 { 672 dev->ops->intr_disable(dev); 673 } 674 675 static inline bool mei_host_is_ready(struct mei_device *dev) 676 { 677 return dev->ops->host_is_ready(dev); 678 } 679 static inline bool mei_hw_is_ready(struct mei_device *dev) 680 { 681 return dev->ops->hw_is_ready(dev); 682 } 683 684 static inline bool mei_hbuf_is_ready(struct mei_device *dev) 685 { 686 return dev->ops->hbuf_is_ready(dev); 687 } 688 689 static inline int mei_hbuf_empty_slots(struct mei_device *dev) 690 { 691 return dev->ops->hbuf_free_slots(dev); 692 } 693 694 static inline size_t mei_hbuf_max_len(const struct mei_device *dev) 695 { 696 return dev->ops->hbuf_max_len(dev); 697 } 698 699 static inline int mei_write_message(struct mei_device *dev, 700 struct mei_msg_hdr *hdr, 701 unsigned char *buf) 702 { 703 return dev->ops->write(dev, hdr, buf); 704 } 705 706 static inline u32 mei_read_hdr(const struct mei_device *dev) 707 { 708 return dev->ops->read_hdr(dev); 709 } 710 711 static inline void mei_read_slots(struct mei_device *dev, 712 unsigned char *buf, unsigned long len) 713 { 714 dev->ops->read(dev, buf, len); 715 } 716 717 static inline int mei_count_full_read_slots(struct mei_device *dev) 718 { 719 return dev->ops->rdbuf_full_slots(dev); 720 } 721 722 int mei_fw_status(struct mei_device *dev, struct mei_fw_status *fw_status); 723 724 #define FW_STS_FMT "%08X %08X" 725 #define FW_STS_PRM(fw_status) \ 726 (fw_status).count > 0 ? (fw_status).status[0] : 0xDEADBEEF, \ 727 (fw_status).count > 1 ? (fw_status).status[1] : 0xDEADBEEF 728 729 bool mei_hbuf_acquire(struct mei_device *dev); 730 731 bool mei_write_is_idle(struct mei_device *dev); 732 733 #if IS_ENABLED(CONFIG_DEBUG_FS) 734 int mei_dbgfs_register(struct mei_device *dev, const char *name); 735 void mei_dbgfs_deregister(struct mei_device *dev); 736 #else 737 static inline int mei_dbgfs_register(struct mei_device *dev, const char *name) 738 { 739 return 0; 740 } 741 static inline void mei_dbgfs_deregister(struct mei_device *dev) {} 742 #endif /* CONFIG_DEBUG_FS */ 743 744 int mei_register(struct mei_device *dev); 745 void mei_deregister(struct mei_device *dev); 746 747 #define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d internal=%1d comp=%1d" 748 #define MEI_HDR_PRM(hdr) \ 749 (hdr)->host_addr, (hdr)->me_addr, \ 750 (hdr)->length, (hdr)->internal, (hdr)->msg_complete 751 752 #endif 753