| /* |
| * |
| * Intel Management Engine Interface (Intel MEI) Linux driver |
| * Copyright (c) 2003-2012, Intel Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| */ |
| |
| #ifndef _MEI_DEV_H_ |
| #define _MEI_DEV_H_ |
| |
| #include <linux/types.h> |
| #include <linux/cdev.h> |
| #include <linux/poll.h> |
| #include <linux/mei.h> |
| #include <linux/mei_cl_bus.h> |
| |
| #include "hw.h" |
| #include "hbm.h" |
| |
| |
| /* |
| * AMTHI Client UUID |
| */ |
| extern const uuid_le mei_amthif_guid; |
| |
| #define MEI_RD_MSG_BUF_SIZE (128 * sizeof(u32)) |
| |
| /* |
| * Number of Maximum MEI Clients |
| */ |
| #define MEI_CLIENTS_MAX 256 |
| |
| /* |
| * maximum number of consecutive resets |
| */ |
| #define MEI_MAX_CONSEC_RESET 3 |
| |
| /* |
| * Number of File descriptors/handles |
| * that can be opened to the driver. |
| * |
| * Limit to 255: 256 Total Clients |
| * minus internal client for MEI Bus Messages |
| */ |
| #define MEI_MAX_OPEN_HANDLE_COUNT (MEI_CLIENTS_MAX - 1) |
| |
| /* File state */ |
| enum file_state { |
| MEI_FILE_INITIALIZING = 0, |
| MEI_FILE_CONNECTING, |
| MEI_FILE_CONNECTED, |
| MEI_FILE_DISCONNECTING, |
| MEI_FILE_DISCONNECT_REPLY, |
| MEI_FILE_DISCONNECT_REQUIRED, |
| MEI_FILE_DISCONNECTED, |
| }; |
| |
| /* MEI device states */ |
| enum mei_dev_state { |
| MEI_DEV_INITIALIZING = 0, |
| MEI_DEV_INIT_CLIENTS, |
| MEI_DEV_ENABLED, |
| MEI_DEV_RESETTING, |
| MEI_DEV_DISABLED, |
| MEI_DEV_POWER_DOWN, |
| MEI_DEV_POWER_UP |
| }; |
| |
| const char *mei_dev_state_str(int state); |
| |
| enum iamthif_states { |
| MEI_IAMTHIF_IDLE, |
| MEI_IAMTHIF_WRITING, |
| MEI_IAMTHIF_READING, |
| }; |
| |
| enum mei_file_transaction_states { |
| MEI_IDLE, |
| MEI_WRITING, |
| MEI_WRITE_COMPLETE, |
| }; |
| |
| /** |
| * enum mei_cb_file_ops - file operation associated with the callback |
| * @MEI_FOP_READ: read |
| * @MEI_FOP_WRITE: write |
| * @MEI_FOP_CONNECT: connect |
| * @MEI_FOP_DISCONNECT: disconnect |
| * @MEI_FOP_DISCONNECT_RSP: disconnect response |
| * @MEI_FOP_NOTIFY_START: start notification |
| * @MEI_FOP_NOTIFY_STOP: stop notification |
| */ |
| enum mei_cb_file_ops { |
| MEI_FOP_READ = 0, |
| MEI_FOP_WRITE, |
| MEI_FOP_CONNECT, |
| MEI_FOP_DISCONNECT, |
| MEI_FOP_DISCONNECT_RSP, |
| MEI_FOP_NOTIFY_START, |
| MEI_FOP_NOTIFY_STOP, |
| }; |
| |
| /** |
| * enum mei_cl_io_mode - io mode between driver and fw |
| * |
| * @MEI_CL_IO_TX_BLOCKING: send is blocking |
| * @MEI_CL_IO_TX_INTERNAL: internal communication between driver and FW |
| */ |
| enum mei_cl_io_mode { |
| MEI_CL_IO_TX_BLOCKING = BIT(0), |
| MEI_CL_IO_TX_INTERNAL = BIT(1), |
| }; |
| |
| /* |
| * Intel MEI message data struct |
| */ |
| struct mei_msg_data { |
| size_t size; |
| unsigned char *data; |
| }; |
| |
| /* Maximum number of processed FW status registers */ |
| #define MEI_FW_STATUS_MAX 6 |
| /* Minimal buffer for FW status string (8 bytes in dw + space or '\0') */ |
| #define MEI_FW_STATUS_STR_SZ (MEI_FW_STATUS_MAX * (8 + 1)) |
| |
| |
| /* |
| * struct mei_fw_status - storage of FW status data |
| * |
| * @count: number of actually available elements in array |
| * @status: FW status registers |
| */ |
| struct mei_fw_status { |
| int count; |
| u32 status[MEI_FW_STATUS_MAX]; |
| }; |
| |
| /** |
| * struct mei_me_client - representation of me (fw) client |
| * |
| * @list: link in me client list |
| * @refcnt: struct reference count |
| * @props: client properties |
| * @client_id: me client id |
| * @tx_flow_ctrl_creds: flow control credits |
| * @connect_count: number connections to this client |
| * @bus_added: added to bus |
| */ |
| struct mei_me_client { |
| struct list_head list; |
| struct kref refcnt; |
| struct mei_client_properties props; |
| u8 client_id; |
| u8 tx_flow_ctrl_creds; |
| u8 connect_count; |
| u8 bus_added; |
| }; |
| |
| |
| struct mei_cl; |
| |
| /** |
| * struct mei_cl_cb - file operation callback structure |
| * |
| * @list: link in callback queue |
| * @cl: file client who is running this operation |
| * @fop_type: file operation type |
| * @buf: buffer for data associated with the callback |
| * @buf_idx: last read index |
| * @fp: pointer to file structure |
| * @status: io status of the cb |
| * @internal: communication between driver and FW flag |
| * @blocking: transmission blocking mode |
| * @completed: the transfer or reception has completed |
| */ |
| struct mei_cl_cb { |
| struct list_head list; |
| struct mei_cl *cl; |
| enum mei_cb_file_ops fop_type; |
| struct mei_msg_data buf; |
| size_t buf_idx; |
| const struct file *fp; |
| int status; |
| u32 internal:1; |
| u32 blocking:1; |
| u32 completed:1; |
| }; |
| |
| /** |
| * struct mei_cl - me client host representation |
| * carried in file->private_data |
| * |
| * @link: link in the clients list |
| * @dev: mei parent device |
| * @state: file operation state |
| * @tx_wait: wait queue for tx completion |
| * @rx_wait: wait queue for rx completion |
| * @wait: wait queue for management operation |
| * @ev_wait: notification wait queue |
| * @ev_async: event async notification |
| * @status: connection status |
| * @me_cl: fw client connected |
| * @fp: file associated with client |
| * @host_client_id: host id |
| * @tx_flow_ctrl_creds: transmit flow credentials |
| * @rx_flow_ctrl_creds: receive flow credentials |
| * @timer_count: watchdog timer for operation completion |
| * @notify_en: notification - enabled/disabled |
| * @notify_ev: pending notification event |
| * @writing_state: state of the tx |
| * @rd_pending: pending read credits |
| * @rd_completed: completed read |
| * |
| * @cldev: device on the mei client bus |
| */ |
| struct mei_cl { |
| struct list_head link; |
| struct mei_device *dev; |
| enum file_state state; |
| wait_queue_head_t tx_wait; |
| wait_queue_head_t rx_wait; |
| wait_queue_head_t wait; |
| wait_queue_head_t ev_wait; |
| struct fasync_struct *ev_async; |
| int status; |
| struct mei_me_client *me_cl; |
| const struct file *fp; |
| u8 host_client_id; |
| u8 tx_flow_ctrl_creds; |
| u8 rx_flow_ctrl_creds; |
| u8 timer_count; |
| u8 notify_en; |
| u8 notify_ev; |
| enum mei_file_transaction_states writing_state; |
| struct list_head rd_pending; |
| struct list_head rd_completed; |
| |
| struct mei_cl_device *cldev; |
| }; |
| |
| /** |
| * struct mei_hw_ops - hw specific ops |
| * |
| * @host_is_ready : query for host readiness |
| * |
| * @hw_is_ready : query if hw is ready |
| * @hw_reset : reset hw |
| * @hw_start : start hw after reset |
| * @hw_config : configure hw |
| * |
| * @fw_status : get fw status registers |
| * @pg_state : power gating state of the device |
| * @pg_in_transition : is device now in pg transition |
| * @pg_is_enabled : is power gating enabled |
| * |
| * @intr_clear : clear pending interrupts |
| * @intr_enable : enable interrupts |
| * @intr_disable : disable interrupts |
| * |
| * @hbuf_free_slots : query for write buffer empty slots |
| * @hbuf_is_ready : query if write buffer is empty |
| * @hbuf_max_len : query for write buffer max len |
| * |
| * @write : write a message to FW |
| * |
| * @rdbuf_full_slots : query how many slots are filled |
| * |
| * @read_hdr : get first 4 bytes (header) |
| * @read : read a buffer from the FW |
| */ |
| struct mei_hw_ops { |
| |
| bool (*host_is_ready)(struct mei_device *dev); |
| |
| bool (*hw_is_ready)(struct mei_device *dev); |
| int (*hw_reset)(struct mei_device *dev, bool enable); |
| int (*hw_start)(struct mei_device *dev); |
| void (*hw_config)(struct mei_device *dev); |
| |
| |
| int (*fw_status)(struct mei_device *dev, struct mei_fw_status *fw_sts); |
| enum mei_pg_state (*pg_state)(struct mei_device *dev); |
| bool (*pg_in_transition)(struct mei_device *dev); |
| bool (*pg_is_enabled)(struct mei_device *dev); |
| |
| void (*intr_clear)(struct mei_device *dev); |
| void (*intr_enable)(struct mei_device *dev); |
| void (*intr_disable)(struct mei_device *dev); |
| |
| int (*hbuf_free_slots)(struct mei_device *dev); |
| bool (*hbuf_is_ready)(struct mei_device *dev); |
| size_t (*hbuf_max_len)(const struct mei_device *dev); |
| int (*write)(struct mei_device *dev, |
| struct mei_msg_hdr *hdr, |
| const unsigned char *buf); |
| |
| int (*rdbuf_full_slots)(struct mei_device *dev); |
| |
| u32 (*read_hdr)(const struct mei_device *dev); |
| int (*read)(struct mei_device *dev, |
| unsigned char *buf, unsigned long len); |
| }; |
| |
| /* MEI bus API*/ |
| void mei_cl_bus_rescan(struct mei_device *bus); |
| void mei_cl_bus_rescan_work(struct work_struct *work); |
| void mei_cl_bus_dev_fixup(struct mei_cl_device *dev); |
| ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, |
| unsigned int mode); |
| ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length); |
| bool mei_cl_bus_rx_event(struct mei_cl *cl); |
| bool mei_cl_bus_notify_event(struct mei_cl *cl); |
| void mei_cl_bus_remove_devices(struct mei_device *bus); |
| int mei_cl_bus_init(void); |
| void mei_cl_bus_exit(void); |
| |
| /** |
| * enum mei_pg_event - power gating transition events |
| * |
| * @MEI_PG_EVENT_IDLE: the driver is not in power gating transition |
| * @MEI_PG_EVENT_WAIT: the driver is waiting for a pg event to complete |
| * @MEI_PG_EVENT_RECEIVED: the driver received pg event |
| * @MEI_PG_EVENT_INTR_WAIT: the driver is waiting for a pg event interrupt |
| * @MEI_PG_EVENT_INTR_RECEIVED: the driver received pg event interrupt |
| */ |
| enum mei_pg_event { |
| MEI_PG_EVENT_IDLE, |
| MEI_PG_EVENT_WAIT, |
| MEI_PG_EVENT_RECEIVED, |
| MEI_PG_EVENT_INTR_WAIT, |
| MEI_PG_EVENT_INTR_RECEIVED, |
| }; |
| |
| /** |
| * enum mei_pg_state - device internal power gating state |
| * |
| * @MEI_PG_OFF: device is not power gated - it is active |
| * @MEI_PG_ON: device is power gated - it is in lower power state |
| */ |
| enum mei_pg_state { |
| MEI_PG_OFF = 0, |
| MEI_PG_ON = 1, |
| }; |
| |
| const char *mei_pg_state_str(enum mei_pg_state state); |
| |
| /** |
| * struct mei_device - MEI private device struct |
| * |
| * @dev : device on a bus |
| * @cdev : character device |
| * @minor : minor number allocated for device |
| * |
| * @write_list : write pending list |
| * @write_waiting_list : write completion list |
| * @ctrl_wr_list : pending control write list |
| * @ctrl_rd_list : pending control read list |
| * |
| * @file_list : list of opened handles |
| * @open_handle_count: number of opened handles |
| * |
| * @device_lock : big device lock |
| * @timer_work : MEI timer delayed work (timeouts) |
| * |
| * @recvd_hw_ready : hw ready message received flag |
| * |
| * @wait_hw_ready : wait queue for receive HW ready message form FW |
| * @wait_pg : wait queue for receive PG message from FW |
| * @wait_hbm_start : wait queue for receive HBM start message from FW |
| * |
| * @reset_count : number of consecutive resets |
| * @dev_state : device state |
| * @hbm_state : state of host bus message protocol |
| * @init_clients_timer : HBM init handshake timeout |
| * |
| * @pg_event : power gating event |
| * @pg_domain : runtime PM domain |
| * |
| * @rd_msg_buf : control messages buffer |
| * @rd_msg_hdr : read message header storage |
| * |
| * @hbuf_depth : depth of hardware host/write buffer is slots |
| * @hbuf_is_ready : query if the host host/write buffer is ready |
| * |
| * @version : HBM protocol version in use |
| * @hbm_f_pg_supported : hbm feature pgi protocol |
| * @hbm_f_dc_supported : hbm feature dynamic clients |
| * @hbm_f_dot_supported : hbm feature disconnect on timeout |
| * @hbm_f_ev_supported : hbm feature event notification |
| * @hbm_f_fa_supported : hbm feature fixed address client |
| * @hbm_f_ie_supported : hbm feature immediate reply to enum request |
| * |
| * @me_clients_rwsem: rw lock over me_clients list |
| * @me_clients : list of FW clients |
| * @me_clients_map : FW clients bit map |
| * @host_clients_map : host clients id pool |
| * |
| * @allow_fixed_address: allow user space to connect a fixed client |
| * @override_fixed_address: force allow fixed address behavior |
| * |
| * @amthif_cmd_list : amthif list for cmd waiting |
| * @iamthif_cl : amthif host client |
| * @iamthif_open_count : number of opened amthif connections |
| * @iamthif_stall_timer : timer to detect amthif hang |
| * @iamthif_state : amthif processor state |
| * @iamthif_canceled : current amthif command is canceled |
| * |
| * @reset_work : work item for the device reset |
| * @bus_rescan_work : work item for the bus rescan |
| * |
| * @device_list : mei client bus list |
| * @cl_bus_lock : client bus list lock |
| * |
| * @dbgfs_dir : debugfs mei root directory |
| * |
| * @ops: : hw specific operations |
| * @hw : hw specific data |
| */ |
| struct mei_device { |
| struct device *dev; |
| struct cdev cdev; |
| int minor; |
| |
| struct mei_cl_cb write_list; |
| struct mei_cl_cb write_waiting_list; |
| struct mei_cl_cb ctrl_wr_list; |
| struct mei_cl_cb ctrl_rd_list; |
| |
| struct list_head file_list; |
| long open_handle_count; |
| |
| struct mutex device_lock; |
| struct delayed_work timer_work; |
| |
| bool recvd_hw_ready; |
| /* |
| * waiting queue for receive message from FW |
| */ |
| wait_queue_head_t wait_hw_ready; |
| wait_queue_head_t wait_pg; |
| wait_queue_head_t wait_hbm_start; |
| |
| /* |
| * mei device states |
| */ |
| unsigned long reset_count; |
| enum mei_dev_state dev_state; |
| enum mei_hbm_state hbm_state; |
| u16 init_clients_timer; |
| |
| /* |
| * Power Gating support |
| */ |
| enum mei_pg_event pg_event; |
| #ifdef CONFIG_PM |
| struct dev_pm_domain pg_domain; |
| #endif /* CONFIG_PM */ |
| |
| unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; |
| u32 rd_msg_hdr; |
| |
| /* write buffer */ |
| u8 hbuf_depth; |
| bool hbuf_is_ready; |
| |
| struct hbm_version version; |
| unsigned int hbm_f_pg_supported:1; |
| unsigned int hbm_f_dc_supported:1; |
| unsigned int hbm_f_dot_supported:1; |
| unsigned int hbm_f_ev_supported:1; |
| unsigned int hbm_f_fa_supported:1; |
| unsigned int hbm_f_ie_supported:1; |
| |
| struct rw_semaphore me_clients_rwsem; |
| struct list_head me_clients; |
| DECLARE_BITMAP(me_clients_map, MEI_CLIENTS_MAX); |
| DECLARE_BITMAP(host_clients_map, MEI_CLIENTS_MAX); |
| |
| bool allow_fixed_address; |
| bool override_fixed_address; |
| |
| /* amthif list for cmd waiting */ |
| struct mei_cl_cb amthif_cmd_list; |
| struct mei_cl iamthif_cl; |
| long iamthif_open_count; |
| u32 iamthif_stall_timer; |
| enum iamthif_states iamthif_state; |
| bool iamthif_canceled; |
| |
| struct work_struct reset_work; |
| struct work_struct bus_rescan_work; |
| |
| /* List of bus devices */ |
| struct list_head device_list; |
| struct mutex cl_bus_lock; |
| |
| #if IS_ENABLED(CONFIG_DEBUG_FS) |
| struct dentry *dbgfs_dir; |
| #endif /* CONFIG_DEBUG_FS */ |
| |
| |
| const struct mei_hw_ops *ops; |
| char hw[0] __aligned(sizeof(void *)); |
| }; |
| |
| static inline unsigned long mei_secs_to_jiffies(unsigned long sec) |
| { |
| return msecs_to_jiffies(sec * MSEC_PER_SEC); |
| } |
| |
| /** |
| * mei_data2slots - get slots - number of (dwords) from a message length |
| * + size of the mei header |
| * |
| * @length: size of the messages in bytes |
| * |
| * Return: number of slots |
| */ |
| static inline u32 mei_data2slots(size_t length) |
| { |
| return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4); |
| } |
| |
| /** |
| * mei_slots2data - get data in slots - bytes from slots |
| * |
| * @slots: number of available slots |
| * |
| * Return: number of bytes in slots |
| */ |
| static inline u32 mei_slots2data(int slots) |
| { |
| return slots * 4; |
| } |
| |
| /* |
| * mei init function prototypes |
| */ |
| void mei_device_init(struct mei_device *dev, |
| struct device *device, |
| const struct mei_hw_ops *hw_ops); |
| int mei_reset(struct mei_device *dev); |
| int mei_start(struct mei_device *dev); |
| int mei_restart(struct mei_device *dev); |
| void mei_stop(struct mei_device *dev); |
| void mei_cancel_work(struct mei_device *dev); |
| |
| /* |
| * MEI interrupt functions prototype |
| */ |
| |
| void mei_timer(struct work_struct *work); |
| void mei_schedule_stall_timer(struct mei_device *dev); |
| int mei_irq_read_handler(struct mei_device *dev, |
| struct mei_cl_cb *cmpl_list, s32 *slots); |
| |
| int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); |
| void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); |
| |
| /* |
| * AMTHIF - AMT Host Interface Functions |
| */ |
| void mei_amthif_reset_params(struct mei_device *dev); |
| |
| int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl); |
| |
| unsigned int mei_amthif_poll(struct file *file, poll_table *wait); |
| |
| int mei_amthif_release(struct mei_device *dev, struct file *file); |
| |
| int mei_amthif_write(struct mei_cl *cl, struct mei_cl_cb *cb); |
| int mei_amthif_run_next_cmd(struct mei_device *dev); |
| int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, |
| struct mei_cl_cb *cmpl_list); |
| |
| void mei_amthif_complete(struct mei_cl *cl, struct mei_cl_cb *cb); |
| int mei_amthif_irq_read_msg(struct mei_cl *cl, |
| struct mei_msg_hdr *mei_hdr, |
| struct mei_cl_cb *complete_list); |
| int mei_amthif_irq_read(struct mei_device *dev, s32 *slots); |
| |
| /* |
| * Register Access Function |
| */ |
| |
| |
| static inline void mei_hw_config(struct mei_device *dev) |
| { |
| dev->ops->hw_config(dev); |
| } |
| |
| static inline enum mei_pg_state mei_pg_state(struct mei_device *dev) |
| { |
| return dev->ops->pg_state(dev); |
| } |
| |
| static inline bool mei_pg_in_transition(struct mei_device *dev) |
| { |
| return dev->ops->pg_in_transition(dev); |
| } |
| |
| static inline bool mei_pg_is_enabled(struct mei_device *dev) |
| { |
| return dev->ops->pg_is_enabled(dev); |
| } |
| |
| static inline int mei_hw_reset(struct mei_device *dev, bool enable) |
| { |
| return dev->ops->hw_reset(dev, enable); |
| } |
| |
| static inline int mei_hw_start(struct mei_device *dev) |
| { |
| return dev->ops->hw_start(dev); |
| } |
| |
| static inline void mei_clear_interrupts(struct mei_device *dev) |
| { |
| dev->ops->intr_clear(dev); |
| } |
| |
| static inline void mei_enable_interrupts(struct mei_device *dev) |
| { |
| dev->ops->intr_enable(dev); |
| } |
| |
| static inline void mei_disable_interrupts(struct mei_device *dev) |
| { |
| dev->ops->intr_disable(dev); |
| } |
| |
| static inline bool mei_host_is_ready(struct mei_device *dev) |
| { |
| return dev->ops->host_is_ready(dev); |
| } |
| static inline bool mei_hw_is_ready(struct mei_device *dev) |
| { |
| return dev->ops->hw_is_ready(dev); |
| } |
| |
| static inline bool mei_hbuf_is_ready(struct mei_device *dev) |
| { |
| return dev->ops->hbuf_is_ready(dev); |
| } |
| |
| static inline int mei_hbuf_empty_slots(struct mei_device *dev) |
| { |
| return dev->ops->hbuf_free_slots(dev); |
| } |
| |
| static inline size_t mei_hbuf_max_len(const struct mei_device *dev) |
| { |
| return dev->ops->hbuf_max_len(dev); |
| } |
| |
| static inline int mei_write_message(struct mei_device *dev, |
| struct mei_msg_hdr *hdr, const void *buf) |
| { |
| return dev->ops->write(dev, hdr, buf); |
| } |
| |
| static inline u32 mei_read_hdr(const struct mei_device *dev) |
| { |
| return dev->ops->read_hdr(dev); |
| } |
| |
| static inline void mei_read_slots(struct mei_device *dev, |
| unsigned char *buf, unsigned long len) |
| { |
| dev->ops->read(dev, buf, len); |
| } |
| |
| static inline int mei_count_full_read_slots(struct mei_device *dev) |
| { |
| return dev->ops->rdbuf_full_slots(dev); |
| } |
| |
| static inline int mei_fw_status(struct mei_device *dev, |
| struct mei_fw_status *fw_status) |
| { |
| return dev->ops->fw_status(dev, fw_status); |
| } |
| |
| bool mei_hbuf_acquire(struct mei_device *dev); |
| |
| bool mei_write_is_idle(struct mei_device *dev); |
| |
| void mei_irq_discard_msg(struct mei_device *dev, struct mei_msg_hdr *hdr); |
| |
| #if IS_ENABLED(CONFIG_DEBUG_FS) |
| int mei_dbgfs_register(struct mei_device *dev, const char *name); |
| void mei_dbgfs_deregister(struct mei_device *dev); |
| #else |
| static inline int mei_dbgfs_register(struct mei_device *dev, const char *name) |
| { |
| return 0; |
| } |
| static inline void mei_dbgfs_deregister(struct mei_device *dev) {} |
| #endif /* CONFIG_DEBUG_FS */ |
| |
| int mei_register(struct mei_device *dev, struct device *parent); |
| void mei_deregister(struct mei_device *dev); |
| |
| #define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d internal=%1d comp=%1d" |
| #define MEI_HDR_PRM(hdr) \ |
| (hdr)->host_addr, (hdr)->me_addr, \ |
| (hdr)->length, (hdr)->internal, (hdr)->msg_complete |
| |
| ssize_t mei_fw_status2str(struct mei_fw_status *fw_sts, char *buf, size_t len); |
| /** |
| * mei_fw_status_str - fetch and convert fw status registers to printable string |
| * |
| * @dev: the device structure |
| * @buf: string buffer at minimal size MEI_FW_STATUS_STR_SZ |
| * @len: buffer len must be >= MEI_FW_STATUS_STR_SZ |
| * |
| * Return: number of bytes written or < 0 on failure |
| */ |
| static inline ssize_t mei_fw_status_str(struct mei_device *dev, |
| char *buf, size_t len) |
| { |
| struct mei_fw_status fw_status; |
| int ret; |
| |
| buf[0] = '\0'; |
| |
| ret = mei_fw_status(dev, &fw_status); |
| if (ret) |
| return ret; |
| |
| ret = mei_fw_status2str(&fw_status, buf, MEI_FW_STATUS_STR_SZ); |
| |
| return ret; |
| } |
| |
| |
| #endif |