root/drivers/misc/mei/mei_dev.h

INCLUDED FROM

DEFINITIONS

1. mei_secs_to_jiffies
2. mei_data2slots
3. mei_hbm2slots
4. mei_slots2data
5. mei_hw_config
6. mei_pg_in_transition
7. mei_pg_is_enabled
8. mei_hw_reset
9. mei_hw_start
10. mei_clear_interrupts
11. mei_enable_interrupts
12. mei_disable_interrupts
13. mei_synchronize_irq
14. mei_host_is_ready
15. mei_hw_is_ready
16. mei_hbuf_is_ready
17. mei_hbuf_empty_slots
18. mei_hbuf_depth
19. mei_write_message
20. mei_read_hdr
21. mei_read_slots
22. mei_count_full_read_slots
23. mei_fw_status
24. mei_dbgfs_register
25. mei_dbgfs_deregister
26. mei_fw_status_str

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (c) 2003-2018, Intel Corporation. All rights reserved.
   4  * Intel Management Engine Interface (Intel MEI) Linux driver
   5  */
   6 
   7 #ifndef _MEI_DEV_H_
   8 #define _MEI_DEV_H_
   9 
  10 #include <linux/types.h>
  11 #include <linux/cdev.h>
  12 #include <linux/poll.h>
  13 #include <linux/mei.h>
  14 #include <linux/mei_cl_bus.h>
  15 
  16 #include "hw.h"
  17 #include "hbm.h"
  18 
  19 #define MEI_SLOT_SIZE             sizeof(u32)
  20 #define MEI_RD_MSG_BUF_SIZE       (128 * MEI_SLOT_SIZE)
  21 
  22 /*
  23  * Number of Maximum MEI Clients
  24  */
  25 #define MEI_CLIENTS_MAX 256
  26 
  27 /*
  28  * maximum number of consecutive resets
  29  */
  30 #define MEI_MAX_CONSEC_RESET  3
  31 
  32 /*
  33  * Number of File descriptors/handles
  34  * that can be opened to the driver.
  35  *
  36  * Limit to 255: 256 Total Clients
  37  * minus internal client for MEI Bus Messages
  38  */
  39 #define  MEI_MAX_OPEN_HANDLE_COUNT (MEI_CLIENTS_MAX - 1)
  40 
  41 /* File state */
  42 enum file_state {
  43         MEI_FILE_UNINITIALIZED = 0,
  44         MEI_FILE_INITIALIZING,
  45         MEI_FILE_CONNECTING,
  46         MEI_FILE_CONNECTED,
  47         MEI_FILE_DISCONNECTING,
  48         MEI_FILE_DISCONNECT_REPLY,
  49         MEI_FILE_DISCONNECT_REQUIRED,
  50         MEI_FILE_DISCONNECTED,
  51 };
  52 
  53 /* MEI device states */
  54 enum mei_dev_state {
  55         MEI_DEV_INITIALIZING = 0,
  56         MEI_DEV_INIT_CLIENTS,
  57         MEI_DEV_ENABLED,
  58         MEI_DEV_RESETTING,
  59         MEI_DEV_DISABLED,
  60         MEI_DEV_POWER_DOWN,
  61         MEI_DEV_POWER_UP
  62 };
  63 
  64 const char *mei_dev_state_str(int state);
  65 
  66 enum mei_file_transaction_states {
  67         MEI_IDLE,
  68         MEI_WRITING,
  69         MEI_WRITE_COMPLETE,
  70 };
  71 
  72 /**
  73  * enum mei_cb_file_ops  - file operation associated with the callback
  74  * @MEI_FOP_READ:       read
  75  * @MEI_FOP_WRITE:      write
  76  * @MEI_FOP_CONNECT:    connect
  77  * @MEI_FOP_DISCONNECT: disconnect
  78  * @MEI_FOP_DISCONNECT_RSP: disconnect response
  79  * @MEI_FOP_NOTIFY_START:   start notification
  80  * @MEI_FOP_NOTIFY_STOP:    stop notification
  81  */
  82 enum mei_cb_file_ops {
  83         MEI_FOP_READ = 0,
  84         MEI_FOP_WRITE,
  85         MEI_FOP_CONNECT,
  86         MEI_FOP_DISCONNECT,
  87         MEI_FOP_DISCONNECT_RSP,
  88         MEI_FOP_NOTIFY_START,
  89         MEI_FOP_NOTIFY_STOP,
  90 };
  91 
  92 /**
  93  * enum mei_cl_io_mode - io mode between driver and fw
  94  *
  95  * @MEI_CL_IO_TX_BLOCKING: send is blocking
  96  * @MEI_CL_IO_TX_INTERNAL: internal communication between driver and FW
  97  *
  98  * @MEI_CL_IO_RX_NONBLOCK: recv is non-blocking
  99  */
 100 enum mei_cl_io_mode {
 101         MEI_CL_IO_TX_BLOCKING = BIT(0),
 102         MEI_CL_IO_TX_INTERNAL = BIT(1),
 103 
 104         MEI_CL_IO_RX_NONBLOCK = BIT(2),
 105 };
 106 
 107 /*
 108  * Intel MEI message data struct
 109  */
 110 struct mei_msg_data {
 111         size_t size;
 112         unsigned char *data;
 113 };
 114 
 115 /**
 116  * struct mei_dma_dscr - dma address descriptor
 117  *
 118  * @vaddr: dma buffer virtual address
 119  * @daddr: dma buffer physical address
 120  * @size : dma buffer size
 121  */
 122 struct mei_dma_dscr {
 123         void *vaddr;
 124         dma_addr_t daddr;
 125         size_t size;
 126 };
 127 
 128 /* Maximum number of processed FW status registers */
 129 #define MEI_FW_STATUS_MAX 6
 130 /* Minimal  buffer for FW status string (8 bytes in dw + space or '\0') */
 131 #define MEI_FW_STATUS_STR_SZ (MEI_FW_STATUS_MAX * (8 + 1))
 132 
 133 
 134 /*
 135  * struct mei_fw_status - storage of FW status data
 136  *
 137  * @count: number of actually available elements in array
 138  * @status: FW status registers
 139  */
 140 struct mei_fw_status {
 141         int count;
 142         u32 status[MEI_FW_STATUS_MAX];
 143 };
 144 
 145 /**
 146  * struct mei_me_client - representation of me (fw) client
 147  *
 148  * @list: link in me client list
 149  * @refcnt: struct reference count
 150  * @props: client properties
 151  * @client_id: me client id
 152  * @tx_flow_ctrl_creds: flow control credits
 153  * @connect_count: number connections to this client
 154  * @bus_added: added to bus
 155  */
 156 struct mei_me_client {
 157         struct list_head list;
 158         struct kref refcnt;
 159         struct mei_client_properties props;
 160         u8 client_id;
 161         u8 tx_flow_ctrl_creds;
 162         u8 connect_count;
 163         u8 bus_added;
 164 };
 165 
 166 
 167 struct mei_cl;
 168 
 169 /**
 170  * struct mei_cl_cb - file operation callback structure
 171  *
 172  * @list: link in callback queue
 173  * @cl: file client who is running this operation
 174  * @fop_type: file operation type
 175  * @buf: buffer for data associated with the callback
 176  * @buf_idx: last read index
 177  * @fp: pointer to file structure
 178  * @status: io status of the cb
 179  * @internal: communication between driver and FW flag
 180  * @blocking: transmission blocking mode
 181  */
 182 struct mei_cl_cb {
 183         struct list_head list;
 184         struct mei_cl *cl;
 185         enum mei_cb_file_ops fop_type;
 186         struct mei_msg_data buf;
 187         size_t buf_idx;
 188         const struct file *fp;
 189         int status;
 190         u32 internal:1;
 191         u32 blocking:1;
 192 };
 193 
 194 /**
 195  * struct mei_cl - me client host representation
 196  *    carried in file->private_data
 197  *
 198  * @link: link in the clients list
 199  * @dev: mei parent device
 200  * @state: file operation state
 201  * @tx_wait: wait queue for tx completion
 202  * @rx_wait: wait queue for rx completion
 203  * @wait:  wait queue for management operation
 204  * @ev_wait: notification wait queue
 205  * @ev_async: event async notification
 206  * @status: connection status
 207  * @me_cl: fw client connected
 208  * @fp: file associated with client
 209  * @host_client_id: host id
 210  * @tx_flow_ctrl_creds: transmit flow credentials
 211  * @rx_flow_ctrl_creds: receive flow credentials
 212  * @timer_count:  watchdog timer for operation completion
 213  * @notify_en: notification - enabled/disabled
 214  * @notify_ev: pending notification event
 215  * @tx_cb_queued: number of tx callbacks in queue
 216  * @writing_state: state of the tx
 217  * @rd_pending: pending read credits
 218  * @rd_completed: completed read
 219  *
 220  * @cldev: device on the mei client bus
 221  */
 222 struct mei_cl {
 223         struct list_head link;
 224         struct mei_device *dev;
 225         enum file_state state;
 226         wait_queue_head_t tx_wait;
 227         wait_queue_head_t rx_wait;
 228         wait_queue_head_t wait;
 229         wait_queue_head_t ev_wait;
 230         struct fasync_struct *ev_async;
 231         int status;
 232         struct mei_me_client *me_cl;
 233         const struct file *fp;
 234         u8 host_client_id;
 235         u8 tx_flow_ctrl_creds;
 236         u8 rx_flow_ctrl_creds;
 237         u8 timer_count;
 238         u8 notify_en;
 239         u8 notify_ev;
 240         u8 tx_cb_queued;
 241         enum mei_file_transaction_states writing_state;
 242         struct list_head rd_pending;
 243         struct list_head rd_completed;
 244 
 245         struct mei_cl_device *cldev;
 246 };
 247 
 248 #define MEI_TX_QUEUE_LIMIT_DEFAULT 50
 249 #define MEI_TX_QUEUE_LIMIT_MAX 255
 250 #define MEI_TX_QUEUE_LIMIT_MIN 30
 251 
 252 /**
 253  * struct mei_hw_ops - hw specific ops
 254  *
 255  * @host_is_ready    : query for host readiness
 256  *
 257  * @hw_is_ready      : query if hw is ready
 258  * @hw_reset         : reset hw
 259  * @hw_start         : start hw after reset
 260  * @hw_config        : configure hw
 261  *
 262  * @fw_status        : get fw status registers
 263  * @pg_state         : power gating state of the device
 264  * @pg_in_transition : is device now in pg transition
 265  * @pg_is_enabled    : is power gating enabled
 266  *
 267  * @intr_clear       : clear pending interrupts
 268  * @intr_enable      : enable interrupts
 269  * @intr_disable     : disable interrupts
 270  * @synchronize_irq  : synchronize irqs
 271  *
 272  * @hbuf_free_slots  : query for write buffer empty slots
 273  * @hbuf_is_ready    : query if write buffer is empty
 274  * @hbuf_depth       : query for write buffer depth
 275  *
 276  * @write            : write a message to FW
 277  *
 278  * @rdbuf_full_slots : query how many slots are filled
 279  *
 280  * @read_hdr         : get first 4 bytes (header)
 281  * @read             : read a buffer from the FW
 282  */
 283 struct mei_hw_ops {
 284 
 285         bool (*host_is_ready)(struct mei_device *dev);
 286 
 287         bool (*hw_is_ready)(struct mei_device *dev);
 288         int (*hw_reset)(struct mei_device *dev, bool enable);
 289         int (*hw_start)(struct mei_device *dev);
 290         void (*hw_config)(struct mei_device *dev);
 291 
 292         int (*fw_status)(struct mei_device *dev, struct mei_fw_status *fw_sts);
 293         enum mei_pg_state (*pg_state)(struct mei_device *dev);
 294         bool (*pg_in_transition)(struct mei_device *dev);
 295         bool (*pg_is_enabled)(struct mei_device *dev);
 296 
 297         void (*intr_clear)(struct mei_device *dev);
 298         void (*intr_enable)(struct mei_device *dev);
 299         void (*intr_disable)(struct mei_device *dev);
 300         void (*synchronize_irq)(struct mei_device *dev);
 301 
 302         int (*hbuf_free_slots)(struct mei_device *dev);
 303         bool (*hbuf_is_ready)(struct mei_device *dev);
 304         u32 (*hbuf_depth)(const struct mei_device *dev);
 305         int (*write)(struct mei_device *dev,
 306                      const void *hdr, size_t hdr_len,
 307                      const void *data, size_t data_len);
 308 
 309         int (*rdbuf_full_slots)(struct mei_device *dev);
 310 
 311         u32 (*read_hdr)(const struct mei_device *dev);
 312         int (*read)(struct mei_device *dev,
 313                      unsigned char *buf, unsigned long len);
 314 };
 315 
 316 /* MEI bus API*/
 317 void mei_cl_bus_rescan_work(struct work_struct *work);
 318 void mei_cl_bus_dev_fixup(struct mei_cl_device *dev);
 319 ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
 320                       unsigned int mode);
 321 ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length,
 322                       unsigned int mode, unsigned long timeout);
 323 bool mei_cl_bus_rx_event(struct mei_cl *cl);
 324 bool mei_cl_bus_notify_event(struct mei_cl *cl);
 325 void mei_cl_bus_remove_devices(struct mei_device *bus);
 326 int mei_cl_bus_init(void);
 327 void mei_cl_bus_exit(void);
 328 
 329 /**
 330  * enum mei_pg_event - power gating transition events
 331  *
 332  * @MEI_PG_EVENT_IDLE: the driver is not in power gating transition
 333  * @MEI_PG_EVENT_WAIT: the driver is waiting for a pg event to complete
 334  * @MEI_PG_EVENT_RECEIVED: the driver received pg event
 335  * @MEI_PG_EVENT_INTR_WAIT: the driver is waiting for a pg event interrupt
 336  * @MEI_PG_EVENT_INTR_RECEIVED: the driver received pg event interrupt
 337  */
 338 enum mei_pg_event {
 339         MEI_PG_EVENT_IDLE,
 340         MEI_PG_EVENT_WAIT,
 341         MEI_PG_EVENT_RECEIVED,
 342         MEI_PG_EVENT_INTR_WAIT,
 343         MEI_PG_EVENT_INTR_RECEIVED,
 344 };
 345 
 346 /**
 347  * enum mei_pg_state - device internal power gating state
 348  *
 349  * @MEI_PG_OFF: device is not power gated - it is active
 350  * @MEI_PG_ON:  device is power gated - it is in lower power state
 351  */
 352 enum mei_pg_state {
 353         MEI_PG_OFF = 0,
 354         MEI_PG_ON =  1,
 355 };
 356 
 357 const char *mei_pg_state_str(enum mei_pg_state state);
 358 
 359 /**
 360  * struct mei_fw_version - MEI FW version struct
 361  *
 362  * @platform: platform identifier
 363  * @major: major version field
 364  * @minor: minor version field
 365  * @buildno: build number version field
 366  * @hotfix: hotfix number version field
 367  */
 368 struct mei_fw_version {
 369         u8 platform;
 370         u8 major;
 371         u16 minor;
 372         u16 buildno;
 373         u16 hotfix;
 374 };
 375 
 376 #define MEI_MAX_FW_VER_BLOCKS 3
 377 
 378 /**
 379  * struct mei_device -  MEI private device struct
 380  *
 381  * @dev         : device on a bus
 382  * @cdev        : character device
 383  * @minor       : minor number allocated for device
 384  *
 385  * @write_list  : write pending list
 386  * @write_waiting_list : write completion list
 387  * @ctrl_wr_list : pending control write list
 388  * @ctrl_rd_list : pending control read list
 389  * @tx_queue_limit: tx queues per client linit
 390  *
 391  * @file_list   : list of opened handles
 392  * @open_handle_count: number of opened handles
 393  *
 394  * @device_lock : big device lock
 395  * @timer_work  : MEI timer delayed work (timeouts)
 396  *
 397  * @recvd_hw_ready : hw ready message received flag
 398  *
 399  * @wait_hw_ready : wait queue for receive HW ready message form FW
 400  * @wait_pg     : wait queue for receive PG message from FW
 401  * @wait_hbm_start : wait queue for receive HBM start message from FW
 402  *
 403  * @reset_count : number of consecutive resets
 404  * @dev_state   : device state
 405  * @hbm_state   : state of host bus message protocol
 406  * @init_clients_timer : HBM init handshake timeout
 407  *
 408  * @pg_event    : power gating event
 409  * @pg_domain   : runtime PM domain
 410  *
 411  * @rd_msg_buf  : control messages buffer
 412  * @rd_msg_hdr  : read message header storage
 413  *
 414  * @hbuf_is_ready : query if the host host/write buffer is ready
 415  * @dr_dscr: DMA ring descriptors: TX, RX, and CTRL
 416  *
 417  * @version     : HBM protocol version in use
 418  * @hbm_f_pg_supported  : hbm feature pgi protocol
 419  * @hbm_f_dc_supported  : hbm feature dynamic clients
 420  * @hbm_f_dot_supported : hbm feature disconnect on timeout
 421  * @hbm_f_ev_supported  : hbm feature event notification
 422  * @hbm_f_fa_supported  : hbm feature fixed address client
 423  * @hbm_f_ie_supported  : hbm feature immediate reply to enum request
 424  * @hbm_f_os_supported  : hbm feature support OS ver message
 425  * @hbm_f_dr_supported  : hbm feature dma ring supported
 426  *
 427  * @fw_ver : FW versions
 428  *
 429  * @fw_f_fw_ver_supported : fw feature: fw version supported
 430  *
 431  * @me_clients_rwsem: rw lock over me_clients list
 432  * @me_clients  : list of FW clients
 433  * @me_clients_map : FW clients bit map
 434  * @host_clients_map : host clients id pool
 435  *
 436  * @allow_fixed_address: allow user space to connect a fixed client
 437  * @override_fixed_address: force allow fixed address behavior
 438  *
 439  * @reset_work  : work item for the device reset
 440  * @bus_rescan_work : work item for the bus rescan
 441  *
 442  * @device_list : mei client bus list
 443  * @cl_bus_lock : client bus list lock
 444  *
 445  * @dbgfs_dir   : debugfs mei root directory
 446  *
 447  * @ops:        : hw specific operations
 448  * @hw          : hw specific data
 449  */
 450 struct mei_device {
 451         struct device *dev;
 452         struct cdev cdev;
 453         int minor;
 454 
 455         struct list_head write_list;
 456         struct list_head write_waiting_list;
 457         struct list_head ctrl_wr_list;
 458         struct list_head ctrl_rd_list;
 459         u8 tx_queue_limit;
 460 
 461         struct list_head file_list;
 462         long open_handle_count;
 463 
 464         struct mutex device_lock;
 465         struct delayed_work timer_work;
 466 
 467         bool recvd_hw_ready;
 468         /*
 469          * waiting queue for receive message from FW
 470          */
 471         wait_queue_head_t wait_hw_ready;
 472         wait_queue_head_t wait_pg;
 473         wait_queue_head_t wait_hbm_start;
 474 
 475         /*
 476          * mei device  states
 477          */
 478         unsigned long reset_count;
 479         enum mei_dev_state dev_state;
 480         enum mei_hbm_state hbm_state;
 481         u16 init_clients_timer;
 482 
 483         /*
 484          * Power Gating support
 485          */
 486         enum mei_pg_event pg_event;
 487 #ifdef CONFIG_PM
 488         struct dev_pm_domain pg_domain;
 489 #endif /* CONFIG_PM */
 490 
 491         unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE];
 492         u32 rd_msg_hdr[MEI_MSG_HDR_MAX];
 493 
 494         /* write buffer */
 495         bool hbuf_is_ready;
 496 
 497         struct mei_dma_dscr dr_dscr[DMA_DSCR_NUM];
 498 
 499         struct hbm_version version;
 500         unsigned int hbm_f_pg_supported:1;
 501         unsigned int hbm_f_dc_supported:1;
 502         unsigned int hbm_f_dot_supported:1;
 503         unsigned int hbm_f_ev_supported:1;
 504         unsigned int hbm_f_fa_supported:1;
 505         unsigned int hbm_f_ie_supported:1;
 506         unsigned int hbm_f_os_supported:1;
 507         unsigned int hbm_f_dr_supported:1;
 508 
 509         struct mei_fw_version fw_ver[MEI_MAX_FW_VER_BLOCKS];
 510 
 511         unsigned int fw_f_fw_ver_supported:1;
 512 
 513         struct rw_semaphore me_clients_rwsem;
 514         struct list_head me_clients;
 515         DECLARE_BITMAP(me_clients_map, MEI_CLIENTS_MAX);
 516         DECLARE_BITMAP(host_clients_map, MEI_CLIENTS_MAX);
 517 
 518         bool allow_fixed_address;
 519         bool override_fixed_address;
 520 
 521         struct work_struct reset_work;
 522         struct work_struct bus_rescan_work;
 523 
 524         /* List of bus devices */
 525         struct list_head device_list;
 526         struct mutex cl_bus_lock;
 527 
 528 #if IS_ENABLED(CONFIG_DEBUG_FS)
 529         struct dentry *dbgfs_dir;
 530 #endif /* CONFIG_DEBUG_FS */
 531 
 532         const struct mei_hw_ops *ops;
 533         char hw[0] __aligned(sizeof(void *));
 534 };
 535 
 536 static inline unsigned long mei_secs_to_jiffies(unsigned long sec)
 537 {
 538         return msecs_to_jiffies(sec * MSEC_PER_SEC);
 539 }
 540 
 541 /**
 542  * mei_data2slots - get slots number from a message length
 543  *
 544  * @length: size of the messages in bytes
 545  *
 546  * Return: number of slots
 547  */
 548 static inline u32 mei_data2slots(size_t length)
 549 {
 550         return DIV_ROUND_UP(length, MEI_SLOT_SIZE);
 551 }
 552 
 553 /**
 554  * mei_hbm2slots - get slots number from a hbm message length
 555  *                 length + size of the mei message header
 556  *
 557  * @length: size of the messages in bytes
 558  *
 559  * Return: number of slots
 560  */
 561 static inline u32 mei_hbm2slots(size_t length)
 562 {
 563         return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, MEI_SLOT_SIZE);
 564 }
 565 
 566 /**
 567  * mei_slots2data - get data in slots - bytes from slots
 568  *
 569  * @slots: number of available slots
 570  *
 571  * Return: number of bytes in slots
 572  */
 573 static inline u32 mei_slots2data(int slots)
 574 {
 575         return slots * MEI_SLOT_SIZE;
 576 }
 577 
 578 /*
 579  * mei init function prototypes
 580  */
 581 void mei_device_init(struct mei_device *dev,
 582                      struct device *device,
 583                      const struct mei_hw_ops *hw_ops);
 584 int mei_reset(struct mei_device *dev);
 585 int mei_start(struct mei_device *dev);
 586 int mei_restart(struct mei_device *dev);
 587 void mei_stop(struct mei_device *dev);
 588 void mei_cancel_work(struct mei_device *dev);
 589 
 590 void mei_set_devstate(struct mei_device *dev, enum mei_dev_state state);
 591 
 592 int mei_dmam_ring_alloc(struct mei_device *dev);
 593 void mei_dmam_ring_free(struct mei_device *dev);
 594 bool mei_dma_ring_is_allocated(struct mei_device *dev);
 595 void mei_dma_ring_reset(struct mei_device *dev);
 596 void mei_dma_ring_read(struct mei_device *dev, unsigned char *buf, u32 len);
 597 void mei_dma_ring_write(struct mei_device *dev, unsigned char *buf, u32 len);
 598 u32 mei_dma_ring_empty_slots(struct mei_device *dev);
 599 
 600 /*
 601  *  MEI interrupt functions prototype
 602  */
 603 
 604 void mei_timer(struct work_struct *work);
 605 void mei_schedule_stall_timer(struct mei_device *dev);
 606 int mei_irq_read_handler(struct mei_device *dev,
 607                          struct list_head *cmpl_list, s32 *slots);
 608 
 609 int mei_irq_write_handler(struct mei_device *dev, struct list_head *cmpl_list);
 610 void mei_irq_compl_handler(struct mei_device *dev, struct list_head *cmpl_list);
 611 
 612 /*
 613  * Register Access Function
 614  */
 615 
 616 
 617 static inline void mei_hw_config(struct mei_device *dev)
 618 {
 619         dev->ops->hw_config(dev);
 620 }
 621 
 622 static inline enum mei_pg_state mei_pg_state(struct mei_device *dev)
 623 {
 624         return dev->ops->pg_state(dev);
 625 }
 626 
 627 static inline bool mei_pg_in_transition(struct mei_device *dev)
 628 {
 629         return dev->ops->pg_in_transition(dev);
 630 }
 631 
 632 static inline bool mei_pg_is_enabled(struct mei_device *dev)
 633 {
 634         return dev->ops->pg_is_enabled(dev);
 635 }
 636 
 637 static inline int mei_hw_reset(struct mei_device *dev, bool enable)
 638 {
 639         return dev->ops->hw_reset(dev, enable);
 640 }
 641 
 642 static inline int mei_hw_start(struct mei_device *dev)
 643 {
 644         return dev->ops->hw_start(dev);
 645 }
 646 
 647 static inline void mei_clear_interrupts(struct mei_device *dev)
 648 {
 649         dev->ops->intr_clear(dev);
 650 }
 651 
 652 static inline void mei_enable_interrupts(struct mei_device *dev)
 653 {
 654         dev->ops->intr_enable(dev);
 655 }
 656 
 657 static inline void mei_disable_interrupts(struct mei_device *dev)
 658 {
 659         dev->ops->intr_disable(dev);
 660 }
 661 
 662 static inline void mei_synchronize_irq(struct mei_device *dev)
 663 {
 664         dev->ops->synchronize_irq(dev);
 665 }
 666 
 667 static inline bool mei_host_is_ready(struct mei_device *dev)
 668 {
 669         return dev->ops->host_is_ready(dev);
 670 }
 671 static inline bool mei_hw_is_ready(struct mei_device *dev)
 672 {
 673         return dev->ops->hw_is_ready(dev);
 674 }
 675 
 676 static inline bool mei_hbuf_is_ready(struct mei_device *dev)
 677 {
 678         return dev->ops->hbuf_is_ready(dev);
 679 }
 680 
 681 static inline int mei_hbuf_empty_slots(struct mei_device *dev)
 682 {
 683         return dev->ops->hbuf_free_slots(dev);
 684 }
 685 
 686 static inline u32 mei_hbuf_depth(const struct mei_device *dev)
 687 {
 688         return dev->ops->hbuf_depth(dev);
 689 }
 690 
 691 static inline int mei_write_message(struct mei_device *dev,
 692                                     const void *hdr, size_t hdr_len,
 693                                     const void *data, size_t data_len)
 694 {
 695         return dev->ops->write(dev, hdr, hdr_len, data, data_len);
 696 }
 697 
 698 static inline u32 mei_read_hdr(const struct mei_device *dev)
 699 {
 700         return dev->ops->read_hdr(dev);
 701 }
 702 
 703 static inline void mei_read_slots(struct mei_device *dev,
 704                      unsigned char *buf, unsigned long len)
 705 {
 706         dev->ops->read(dev, buf, len);
 707 }
 708 
 709 static inline int mei_count_full_read_slots(struct mei_device *dev)
 710 {
 711         return dev->ops->rdbuf_full_slots(dev);
 712 }
 713 
 714 static inline int mei_fw_status(struct mei_device *dev,
 715                                 struct mei_fw_status *fw_status)
 716 {
 717         return dev->ops->fw_status(dev, fw_status);
 718 }
 719 
 720 bool mei_hbuf_acquire(struct mei_device *dev);
 721 
 722 bool mei_write_is_idle(struct mei_device *dev);
 723 
 724 #if IS_ENABLED(CONFIG_DEBUG_FS)
 725 void mei_dbgfs_register(struct mei_device *dev, const char *name);
 726 void mei_dbgfs_deregister(struct mei_device *dev);
 727 #else
 728 static inline void mei_dbgfs_register(struct mei_device *dev, const char *name) {}
 729 static inline void mei_dbgfs_deregister(struct mei_device *dev) {}
 730 #endif /* CONFIG_DEBUG_FS */
 731 
 732 int mei_register(struct mei_device *dev, struct device *parent);
 733 void mei_deregister(struct mei_device *dev);
 734 
 735 #define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d dma=%1d internal=%1d comp=%1d"
 736 #define MEI_HDR_PRM(hdr)                  \
 737         (hdr)->host_addr, (hdr)->me_addr, \
 738         (hdr)->length, (hdr)->dma_ring, (hdr)->internal, (hdr)->msg_complete
 739 
 740 ssize_t mei_fw_status2str(struct mei_fw_status *fw_sts, char *buf, size_t len);
 741 /**
 742  * mei_fw_status_str - fetch and convert fw status registers to printable string
 743  *
 744  * @dev: the device structure
 745  * @buf: string buffer at minimal size MEI_FW_STATUS_STR_SZ
 746  * @len: buffer len must be >= MEI_FW_STATUS_STR_SZ
 747  *
 748  * Return: number of bytes written or < 0 on failure
 749  */
 750 static inline ssize_t mei_fw_status_str(struct mei_device *dev,
 751                                         char *buf, size_t len)
 752 {
 753         struct mei_fw_status fw_status;
 754         int ret;
 755 
 756         buf[0] = '\0';
 757 
 758         ret = mei_fw_status(dev, &fw_status);
 759         if (ret)
 760                 return ret;
 761 
 762         ret = mei_fw_status2str(&fw_status, buf, MEI_FW_STATUS_STR_SZ);
 763 
 764         return ret;
 765 }
 766 
 767 
 768 #endif