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 * @host_is_ready - query for host readiness 231 232 * @hw_is_ready - query if hw is ready 233 * @hw_reset - reset hw 234 * @hw_start - start hw after reset 235 * @hw_config - configure hw 236 237 * @pg_state - power gating state of the device 238 * @pg_is_enabled - is power gating enabled 239 240 * @intr_clear - clear pending interrupts 241 * @intr_enable - enable interrupts 242 * @intr_disable - disable interrupts 243 244 * @hbuf_free_slots - query for write buffer empty slots 245 * @hbuf_is_ready - query if write buffer is empty 246 * @hbuf_max_len - query for write buffer max len 247 248 * @write - write a message to FW 249 250 * @rdbuf_full_slots - query how many slots are filled 251 252 * @read_hdr - get first 4 bytes (header) 253 * @read - read a buffer from the FW 254 */ 255 struct mei_hw_ops { 256 257 bool (*host_is_ready)(struct mei_device *dev); 258 259 bool (*hw_is_ready)(struct mei_device *dev); 260 int (*hw_reset)(struct mei_device *dev, bool enable); 261 int (*hw_start)(struct mei_device *dev); 262 void (*hw_config)(struct mei_device *dev); 263 264 enum mei_pg_state (*pg_state)(struct mei_device *dev); 265 bool (*pg_is_enabled)(struct mei_device *dev); 266 267 void (*intr_clear)(struct mei_device *dev); 268 void (*intr_enable)(struct mei_device *dev); 269 void (*intr_disable)(struct mei_device *dev); 270 271 int (*hbuf_free_slots)(struct mei_device *dev); 272 bool (*hbuf_is_ready)(struct mei_device *dev); 273 size_t (*hbuf_max_len)(const struct mei_device *dev); 274 275 int (*write)(struct mei_device *dev, 276 struct mei_msg_hdr *hdr, 277 unsigned char *buf); 278 279 int (*rdbuf_full_slots)(struct mei_device *dev); 280 281 u32 (*read_hdr)(const struct mei_device *dev); 282 int (*read)(struct mei_device *dev, 283 unsigned char *buf, unsigned long len); 284 }; 285 286 /* MEI bus API*/ 287 288 /** 289 * struct mei_cl_ops - MEI CL device ops 290 * This structure allows ME host clients to implement technology 291 * specific operations. 292 * 293 * @enable: Enable an MEI CL device. Some devices require specific 294 * HECI commands to initialize completely. 295 * @disable: Disable an MEI CL device. 296 * @send: Tx hook for the device. This allows ME host clients to trap 297 * the device driver buffers before actually physically 298 * pushing it to the ME. 299 * @recv: Rx hook for the device. This allows ME host clients to trap the 300 * ME buffers before forwarding them to the device driver. 301 */ 302 struct mei_cl_ops { 303 int (*enable)(struct mei_cl_device *device); 304 int (*disable)(struct mei_cl_device *device); 305 int (*send)(struct mei_cl_device *device, u8 *buf, size_t length); 306 int (*recv)(struct mei_cl_device *device, u8 *buf, size_t length); 307 }; 308 309 struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, 310 uuid_le uuid, char *name, 311 struct mei_cl_ops *ops); 312 void mei_cl_remove_device(struct mei_cl_device *device); 313 314 int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length); 315 int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length); 316 int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length); 317 void mei_cl_bus_rx_event(struct mei_cl *cl); 318 void mei_cl_bus_remove_devices(struct mei_device *dev); 319 int mei_cl_bus_init(void); 320 void mei_cl_bus_exit(void); 321 322 323 /** 324 * struct mei_cl_device - MEI device handle 325 * An mei_cl_device pointer is returned from mei_add_device() 326 * and links MEI bus clients to their actual ME host client pointer. 327 * Drivers for MEI devices will get an mei_cl_device pointer 328 * when being probed and shall use it for doing ME bus I/O. 329 * 330 * @dev: linux driver model device pointer 331 * @uuid: me client uuid 332 * @cl: mei client 333 * @ops: ME transport ops 334 * @event_cb: Drivers register this callback to get asynchronous ME 335 * events (e.g. Rx buffer pending) notifications. 336 * @events: Events bitmask sent to the driver. 337 * @priv_data: client private data 338 */ 339 struct mei_cl_device { 340 struct device dev; 341 342 struct mei_cl *cl; 343 344 const struct mei_cl_ops *ops; 345 346 struct work_struct event_work; 347 mei_cl_event_cb_t event_cb; 348 void *event_context; 349 unsigned long events; 350 351 void *priv_data; 352 }; 353 354 355 /** 356 * enum mei_pg_event - power gating transition events 357 * 358 * @MEI_PG_EVENT_IDLE: the driver is not in power gating transition 359 * @MEI_PG_EVENT_WAIT: the driver is waiting for a pg event to complete 360 * @MEI_PG_EVENT_RECEIVED: the driver received pg event 361 */ 362 enum mei_pg_event { 363 MEI_PG_EVENT_IDLE, 364 MEI_PG_EVENT_WAIT, 365 MEI_PG_EVENT_RECEIVED, 366 }; 367 368 /** 369 * enum mei_pg_state - device internal power gating state 370 * 371 * @MEI_PG_OFF: device is not power gated - it is active 372 * @MEI_PG_ON: device is power gated - it is in lower power state 373 */ 374 enum mei_pg_state { 375 MEI_PG_OFF = 0, 376 MEI_PG_ON = 1, 377 }; 378 379 /* 380 * mei_cfg 381 * 382 * @fw_status - FW status 383 * @quirk_probe - device exclusion quirk 384 */ 385 struct mei_cfg { 386 const struct mei_fw_status fw_status; 387 bool (*quirk_probe)(struct pci_dev *pdev); 388 }; 389 390 391 #define MEI_PCI_DEVICE(dev, cfg) \ 392 .vendor = PCI_VENDOR_ID_INTEL, .device = (dev), \ 393 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, \ 394 .driver_data = (kernel_ulong_t)&(cfg) 395 396 397 /** 398 * struct mei_device - MEI private device struct 399 400 * @pdev - pointer to pci device struct 401 * @cdev - character device 402 * @minor - minor number allocated for device 403 * 404 * @reset_count - limits the number of consecutive resets 405 * @hbm_state - state of host bus message protocol 406 * @pg_event - power gating event 407 * @mem_addr - mem mapped base register address 408 409 * @hbuf_depth - depth of hardware host/write buffer is slots 410 * @hbuf_is_ready - query if the host host/write buffer is ready 411 * @wr_msg - the buffer for hbm control messages 412 * @cfg - per device generation config and ops 413 */ 414 struct mei_device { 415 struct pci_dev *pdev; /* pointer to pci device struct */ 416 struct cdev cdev; 417 int minor; 418 419 /* 420 * lists of queues 421 */ 422 /* array of pointers to aio lists */ 423 struct mei_cl_cb read_list; /* driver read queue */ 424 struct mei_cl_cb write_list; /* driver write queue */ 425 struct mei_cl_cb write_waiting_list; /* write waiting queue */ 426 struct mei_cl_cb ctrl_wr_list; /* managed write IOCTL list */ 427 struct mei_cl_cb ctrl_rd_list; /* managed read IOCTL list */ 428 429 /* 430 * list of files 431 */ 432 struct list_head file_list; 433 long open_handle_count; 434 435 /* 436 * lock for the device 437 */ 438 struct mutex device_lock; /* device lock */ 439 struct delayed_work timer_work; /* MEI timer delayed work (timeouts) */ 440 441 bool recvd_hw_ready; 442 /* 443 * waiting queue for receive message from FW 444 */ 445 wait_queue_head_t wait_hw_ready; 446 wait_queue_head_t wait_pg; 447 wait_queue_head_t wait_recvd_msg; 448 wait_queue_head_t wait_stop_wd; 449 450 /* 451 * mei device states 452 */ 453 unsigned long reset_count; 454 enum mei_dev_state dev_state; 455 enum mei_hbm_state hbm_state; 456 u16 init_clients_timer; 457 458 /* 459 * Power Gating support 460 */ 461 enum mei_pg_event pg_event; 462 #ifdef CONFIG_PM_RUNTIME 463 struct dev_pm_domain pg_domain; 464 #endif /* CONFIG_PM_RUNTIME */ 465 466 unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; /* control messages */ 467 u32 rd_msg_hdr; 468 469 /* write buffer */ 470 u8 hbuf_depth; 471 bool hbuf_is_ready; 472 473 /* used for control messages */ 474 struct { 475 struct mei_msg_hdr hdr; 476 unsigned char data[128]; 477 } wr_msg; 478 479 struct hbm_version version; 480 481 struct mei_me_client *me_clients; /* Note: memory has to be allocated */ 482 DECLARE_BITMAP(me_clients_map, MEI_CLIENTS_MAX); 483 DECLARE_BITMAP(host_clients_map, MEI_CLIENTS_MAX); 484 unsigned long me_clients_num; 485 unsigned long me_client_presentation_num; 486 unsigned long me_client_index; 487 488 struct mei_cl wd_cl; 489 enum mei_wd_states wd_state; 490 bool wd_pending; 491 u16 wd_timeout; 492 unsigned char wd_data[MEI_WD_START_MSG_SIZE]; 493 494 495 /* amthif list for cmd waiting */ 496 struct mei_cl_cb amthif_cmd_list; 497 /* driver managed amthif list for reading completed amthif cmd data */ 498 struct mei_cl_cb amthif_rd_complete_list; 499 struct file *iamthif_file_object; 500 struct mei_cl iamthif_cl; 501 struct mei_cl_cb *iamthif_current_cb; 502 long iamthif_open_count; 503 int iamthif_mtu; 504 unsigned long iamthif_timer; 505 u32 iamthif_stall_timer; 506 unsigned char *iamthif_msg_buf; /* Note: memory has to be allocated */ 507 u32 iamthif_msg_buf_size; 508 u32 iamthif_msg_buf_index; 509 enum iamthif_states iamthif_state; 510 bool iamthif_flow_control_pending; 511 bool iamthif_ioctl; 512 bool iamthif_canceled; 513 514 struct work_struct init_work; 515 struct work_struct reset_work; 516 517 /* List of bus devices */ 518 struct list_head device_list; 519 520 #if IS_ENABLED(CONFIG_DEBUG_FS) 521 struct dentry *dbgfs_dir; 522 #endif /* CONFIG_DEBUG_FS */ 523 524 525 const struct mei_hw_ops *ops; 526 const struct mei_cfg *cfg; 527 char hw[0] __aligned(sizeof(void *)); 528 }; 529 530 static inline unsigned long mei_secs_to_jiffies(unsigned long sec) 531 { 532 return msecs_to_jiffies(sec * MSEC_PER_SEC); 533 } 534 535 /** 536 * mei_data2slots - get slots - number of (dwords) from a message length 537 * + size of the mei header 538 * @length - size of the messages in bytes 539 * returns - number of slots 540 */ 541 static inline u32 mei_data2slots(size_t length) 542 { 543 return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4); 544 } 545 546 /** 547 * mei_slots2data- get data in slots - bytes from slots 548 * @slots - number of available slots 549 * returns - number of bytes in slots 550 */ 551 static inline u32 mei_slots2data(int slots) 552 { 553 return slots * 4; 554 } 555 556 /* 557 * mei init function prototypes 558 */ 559 void mei_device_init(struct mei_device *dev, const struct mei_cfg *cfg); 560 int mei_reset(struct mei_device *dev); 561 int mei_start(struct mei_device *dev); 562 int mei_restart(struct mei_device *dev); 563 void mei_stop(struct mei_device *dev); 564 void mei_cancel_work(struct mei_device *dev); 565 566 /* 567 * MEI interrupt functions prototype 568 */ 569 570 void mei_timer(struct work_struct *work); 571 int mei_irq_read_handler(struct mei_device *dev, 572 struct mei_cl_cb *cmpl_list, s32 *slots); 573 574 int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); 575 void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); 576 577 /* 578 * AMTHIF - AMT Host Interface Functions 579 */ 580 void mei_amthif_reset_params(struct mei_device *dev); 581 582 int mei_amthif_host_init(struct mei_device *dev); 583 584 int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *priv_cb); 585 586 int mei_amthif_read(struct mei_device *dev, struct file *file, 587 char __user *ubuf, size_t length, loff_t *offset); 588 589 unsigned int mei_amthif_poll(struct mei_device *dev, 590 struct file *file, poll_table *wait); 591 592 int mei_amthif_release(struct mei_device *dev, struct file *file); 593 594 struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev, 595 struct file *file); 596 597 void mei_amthif_run_next_cmd(struct mei_device *dev); 598 599 int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, 600 struct mei_cl_cb *cmpl_list); 601 602 void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb); 603 int mei_amthif_irq_read_msg(struct mei_device *dev, 604 struct mei_msg_hdr *mei_hdr, 605 struct mei_cl_cb *complete_list); 606 int mei_amthif_irq_read(struct mei_device *dev, s32 *slots); 607 608 /* 609 * NFC functions 610 */ 611 int mei_nfc_host_init(struct mei_device *dev); 612 void mei_nfc_host_exit(struct mei_device *dev); 613 614 /* 615 * NFC Client UUID 616 */ 617 extern const uuid_le mei_nfc_guid; 618 619 int mei_wd_send(struct mei_device *dev); 620 int mei_wd_stop(struct mei_device *dev); 621 int mei_wd_host_init(struct mei_device *dev); 622 /* 623 * mei_watchdog_register - Registering watchdog interface 624 * once we got connection to the WD Client 625 * @dev - mei device 626 */ 627 int mei_watchdog_register(struct mei_device *dev); 628 /* 629 * mei_watchdog_unregister - Unregistering watchdog interface 630 * @dev - mei device 631 */ 632 void mei_watchdog_unregister(struct mei_device *dev); 633 634 /* 635 * Register Access Function 636 */ 637 638 639 static inline void mei_hw_config(struct mei_device *dev) 640 { 641 dev->ops->hw_config(dev); 642 } 643 644 static inline enum mei_pg_state mei_pg_state(struct mei_device *dev) 645 { 646 return dev->ops->pg_state(dev); 647 } 648 649 static inline bool mei_pg_is_enabled(struct mei_device *dev) 650 { 651 return dev->ops->pg_is_enabled(dev); 652 } 653 654 static inline int mei_hw_reset(struct mei_device *dev, bool enable) 655 { 656 return dev->ops->hw_reset(dev, enable); 657 } 658 659 static inline int mei_hw_start(struct mei_device *dev) 660 { 661 return dev->ops->hw_start(dev); 662 } 663 664 static inline void mei_clear_interrupts(struct mei_device *dev) 665 { 666 dev->ops->intr_clear(dev); 667 } 668 669 static inline void mei_enable_interrupts(struct mei_device *dev) 670 { 671 dev->ops->intr_enable(dev); 672 } 673 674 static inline void mei_disable_interrupts(struct mei_device *dev) 675 { 676 dev->ops->intr_disable(dev); 677 } 678 679 static inline bool mei_host_is_ready(struct mei_device *dev) 680 { 681 return dev->ops->host_is_ready(dev); 682 } 683 static inline bool mei_hw_is_ready(struct mei_device *dev) 684 { 685 return dev->ops->hw_is_ready(dev); 686 } 687 688 static inline bool mei_hbuf_is_ready(struct mei_device *dev) 689 { 690 return dev->ops->hbuf_is_ready(dev); 691 } 692 693 static inline int mei_hbuf_empty_slots(struct mei_device *dev) 694 { 695 return dev->ops->hbuf_free_slots(dev); 696 } 697 698 static inline size_t mei_hbuf_max_len(const struct mei_device *dev) 699 { 700 return dev->ops->hbuf_max_len(dev); 701 } 702 703 static inline int mei_write_message(struct mei_device *dev, 704 struct mei_msg_hdr *hdr, 705 unsigned char *buf) 706 { 707 return dev->ops->write(dev, hdr, buf); 708 } 709 710 static inline u32 mei_read_hdr(const struct mei_device *dev) 711 { 712 return dev->ops->read_hdr(dev); 713 } 714 715 static inline void mei_read_slots(struct mei_device *dev, 716 unsigned char *buf, unsigned long len) 717 { 718 dev->ops->read(dev, buf, len); 719 } 720 721 static inline int mei_count_full_read_slots(struct mei_device *dev) 722 { 723 return dev->ops->rdbuf_full_slots(dev); 724 } 725 726 int mei_fw_status(struct mei_device *dev, struct mei_fw_status *fw_status); 727 728 #define FW_STS_FMT "%08X %08X" 729 #define FW_STS_PRM(fw_status) \ 730 (fw_status).count > 0 ? (fw_status).status[0] : 0xDEADBEEF, \ 731 (fw_status).count > 1 ? (fw_status).status[1] : 0xDEADBEEF 732 733 bool mei_hbuf_acquire(struct mei_device *dev); 734 735 bool mei_write_is_idle(struct mei_device *dev); 736 737 #if IS_ENABLED(CONFIG_DEBUG_FS) 738 int mei_dbgfs_register(struct mei_device *dev, const char *name); 739 void mei_dbgfs_deregister(struct mei_device *dev); 740 #else 741 static inline int mei_dbgfs_register(struct mei_device *dev, const char *name) 742 { 743 return 0; 744 } 745 static inline void mei_dbgfs_deregister(struct mei_device *dev) {} 746 #endif /* CONFIG_DEBUG_FS */ 747 748 int mei_register(struct mei_device *dev, struct device *parent); 749 void mei_deregister(struct mei_device *dev); 750 751 #define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d internal=%1d comp=%1d" 752 #define MEI_HDR_PRM(hdr) \ 753 (hdr)->host_addr, (hdr)->me_addr, \ 754 (hdr)->length, (hdr)->internal, (hdr)->msg_complete 755 756 #endif 757