![Tomas Winkler](/assets/img/avatar_default.png)
1. Use rw lock to access the me_clients list 2. Reuse already defined find functions also when removing particular me client 3. Add wrappers for addition and deletion Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
867 lines
22 KiB
C
867 lines
22 KiB
C
/*
|
|
*
|
|
* 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/watchdog.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/mei.h>
|
|
#include <linux/mei_cl_bus.h>
|
|
|
|
#include "hw.h"
|
|
#include "hbm.h"
|
|
|
|
/*
|
|
* watch dog definition
|
|
*/
|
|
#define MEI_WD_HDR_SIZE 4
|
|
#define MEI_WD_STOP_MSG_SIZE MEI_WD_HDR_SIZE
|
|
#define MEI_WD_START_MSG_SIZE (MEI_WD_HDR_SIZE + 16)
|
|
|
|
#define MEI_WD_DEFAULT_TIMEOUT 120 /* seconds */
|
|
#define MEI_WD_MIN_TIMEOUT 120 /* seconds */
|
|
#define MEI_WD_MAX_TIMEOUT 65535 /* seconds */
|
|
|
|
#define MEI_WD_STOP_TIMEOUT 10 /* msecs */
|
|
|
|
#define MEI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
|
|
|
|
#define MEI_RD_MSG_BUF_SIZE (128 * sizeof(u32))
|
|
|
|
|
|
/*
|
|
* AMTHI Client UUID
|
|
*/
|
|
extern const uuid_le mei_amthif_guid;
|
|
|
|
/*
|
|
* Watchdog Client UUID
|
|
*/
|
|
extern const uuid_le mei_wd_guid;
|
|
|
|
/*
|
|
* 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)
|
|
|
|
/*
|
|
* Internal Clients Number
|
|
*/
|
|
#define MEI_HOST_CLIENT_ID_ANY (-1)
|
|
#define MEI_HBM_HOST_CLIENT_ID 0 /* not used, just for documentation */
|
|
#define MEI_WD_HOST_CLIENT_ID 1
|
|
#define MEI_IAMTHIF_HOST_CLIENT_ID 2
|
|
|
|
|
|
/* File state */
|
|
enum file_state {
|
|
MEI_FILE_INITIALIZING = 0,
|
|
MEI_FILE_CONNECTING,
|
|
MEI_FILE_CONNECTED,
|
|
MEI_FILE_DISCONNECTING,
|
|
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_FLOW_CONTROL,
|
|
MEI_IAMTHIF_READING,
|
|
MEI_IAMTHIF_READ_COMPLETE
|
|
};
|
|
|
|
enum mei_file_transaction_states {
|
|
MEI_IDLE,
|
|
MEI_WRITING,
|
|
MEI_WRITE_COMPLETE,
|
|
MEI_FLOW_CONTROL,
|
|
MEI_READING,
|
|
MEI_READ_COMPLETE
|
|
};
|
|
|
|
enum mei_wd_states {
|
|
MEI_WD_IDLE,
|
|
MEI_WD_RUNNING,
|
|
MEI_WD_STOPPING,
|
|
};
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
enum mei_cb_file_ops {
|
|
MEI_FOP_READ = 0,
|
|
MEI_FOP_WRITE,
|
|
MEI_FOP_CONNECT,
|
|
MEI_FOP_DISCONNECT,
|
|
MEI_FOP_DISCONNECT_RSP,
|
|
};
|
|
|
|
/*
|
|
* Intel MEI message data struct
|
|
*/
|
|
struct mei_msg_data {
|
|
u32 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
|
|
* @mei_flow_ctrl_creds: flow control credits
|
|
*/
|
|
struct mei_me_client {
|
|
struct list_head list;
|
|
struct kref refcnt;
|
|
struct mei_client_properties props;
|
|
u8 client_id;
|
|
u8 mei_flow_ctrl_creds;
|
|
};
|
|
|
|
|
|
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
|
|
* @request_buffer: buffer to store request data
|
|
* @response_buffer: buffer to store response data
|
|
* @buf_idx: last read index
|
|
* @read_time: last read operation time stamp (iamthif)
|
|
* @file_object: pointer to file structure
|
|
* @internal: communication between driver and FW flag
|
|
*/
|
|
struct mei_cl_cb {
|
|
struct list_head list;
|
|
struct mei_cl *cl;
|
|
enum mei_cb_file_ops fop_type;
|
|
struct mei_msg_data request_buffer;
|
|
struct mei_msg_data response_buffer;
|
|
unsigned long buf_idx;
|
|
unsigned long read_time;
|
|
struct file *file_object;
|
|
u32 internal: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
|
|
* @status: connection status
|
|
* @cl_uuid: client uuid name
|
|
* @host_client_id: host id
|
|
* @me_client_id: me/fw id
|
|
* @mei_flow_ctrl_creds: transmit flow credentials
|
|
* @timer_count: watchdog timer for operation completion
|
|
* @reading_state: state of the rx
|
|
* @writing_state: state of the tx
|
|
* @read_cb: current pending reading callback
|
|
*
|
|
* @device: device on the mei client bus
|
|
* @device_link: link to bus clients
|
|
*/
|
|
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;
|
|
int status;
|
|
uuid_le cl_uuid;
|
|
u8 host_client_id;
|
|
u8 me_client_id;
|
|
u8 mei_flow_ctrl_creds;
|
|
u8 timer_count;
|
|
enum mei_file_transaction_states reading_state;
|
|
enum mei_file_transaction_states writing_state;
|
|
struct mei_cl_cb *read_cb;
|
|
|
|
/* MEI CL bus data */
|
|
struct mei_cl_device *device;
|
|
struct list_head device_link;
|
|
};
|
|
|
|
/** struct mei_hw_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_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_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,
|
|
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*/
|
|
|
|
/**
|
|
* struct mei_cl_ops - MEI CL device ops
|
|
* This structure allows ME host clients to implement technology
|
|
* specific operations.
|
|
*
|
|
* @enable: Enable an MEI CL device. Some devices require specific
|
|
* HECI commands to initialize completely.
|
|
* @disable: Disable an MEI CL device.
|
|
* @send: Tx hook for the device. This allows ME host clients to trap
|
|
* the device driver buffers before actually physically
|
|
* pushing it to the ME.
|
|
* @recv: Rx hook for the device. This allows ME host clients to trap the
|
|
* ME buffers before forwarding them to the device driver.
|
|
*/
|
|
struct mei_cl_ops {
|
|
int (*enable)(struct mei_cl_device *device);
|
|
int (*disable)(struct mei_cl_device *device);
|
|
int (*send)(struct mei_cl_device *device, u8 *buf, size_t length);
|
|
int (*recv)(struct mei_cl_device *device, u8 *buf, size_t length);
|
|
};
|
|
|
|
struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
|
|
uuid_le uuid, char *name,
|
|
struct mei_cl_ops *ops);
|
|
void mei_cl_remove_device(struct mei_cl_device *device);
|
|
|
|
ssize_t __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length);
|
|
ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length);
|
|
ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
|
|
void mei_cl_bus_rx_event(struct mei_cl *cl);
|
|
void mei_cl_bus_remove_devices(struct mei_device *dev);
|
|
int mei_cl_bus_init(void);
|
|
void mei_cl_bus_exit(void);
|
|
struct mei_cl *mei_cl_bus_find_cl_by_uuid(struct mei_device *dev, uuid_le uuid);
|
|
|
|
|
|
/**
|
|
* struct mei_cl_device - MEI device handle
|
|
* An mei_cl_device pointer is returned from mei_add_device()
|
|
* and links MEI bus clients to their actual ME host client pointer.
|
|
* Drivers for MEI devices will get an mei_cl_device pointer
|
|
* when being probed and shall use it for doing ME bus I/O.
|
|
*
|
|
* @dev: linux driver model device pointer
|
|
* @cl: mei client
|
|
* @ops: ME transport ops
|
|
* @event_work: async work to execute event callback
|
|
* @event_cb: Drivers register this callback to get asynchronous ME
|
|
* events (e.g. Rx buffer pending) notifications.
|
|
* @event_context: event callback run context
|
|
* @events: Events bitmask sent to the driver.
|
|
* @priv_data: client private data
|
|
*/
|
|
struct mei_cl_device {
|
|
struct device dev;
|
|
|
|
struct mei_cl *cl;
|
|
|
|
const struct mei_cl_ops *ops;
|
|
|
|
struct work_struct event_work;
|
|
mei_cl_event_cb_t event_cb;
|
|
void *event_context;
|
|
unsigned long events;
|
|
|
|
void *priv_data;
|
|
};
|
|
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
enum mei_pg_event {
|
|
MEI_PG_EVENT_IDLE,
|
|
MEI_PG_EVENT_WAIT,
|
|
MEI_PG_EVENT_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
|
|
*
|
|
* @read_list : read completion list
|
|
* @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
|
|
* @wait_stop_wd : wait queue for receive WD stop 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
|
|
* @wr_msg : the buffer for hbm control messages
|
|
*
|
|
* @version : HBM protocol version in use
|
|
* @hbm_f_pg_supported : hbm feature pgi protocol
|
|
*
|
|
* @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
|
|
* @me_client_index : last FW client index in enumeration
|
|
*
|
|
* @wd_cl : watchdog client
|
|
* @wd_state : watchdog client state
|
|
* @wd_pending : watchdog command is pending
|
|
* @wd_timeout : watchdog expiration timeout
|
|
* @wd_data : watchdog message buffer
|
|
*
|
|
* @amthif_cmd_list : amthif list for cmd waiting
|
|
* @amthif_rd_complete_list : amthif list for reading completed cmd data
|
|
* @iamthif_file_object : file for current amthif operation
|
|
* @iamthif_cl : amthif host client
|
|
* @iamthif_current_cb : amthif current operation callback
|
|
* @iamthif_open_count : number of opened amthif connections
|
|
* @iamthif_mtu : amthif client max message length
|
|
* @iamthif_timer : time stamp of current amthif command completion
|
|
* @iamthif_stall_timer : timer to detect amthif hang
|
|
* @iamthif_msg_buf : amthif current message buffer
|
|
* @iamthif_msg_buf_size : size of current amthif message request buffer
|
|
* @iamthif_msg_buf_index : current index in amthif message request buffer
|
|
* @iamthif_state : amthif processor state
|
|
* @iamthif_flow_control_pending: amthif waits for flow control
|
|
* @iamthif_ioctl : wait for completion if amthif control message
|
|
* @iamthif_canceled : current amthif command is canceled
|
|
*
|
|
* @init_work : work item for the device init
|
|
* @reset_work : work item for the device reset
|
|
*
|
|
* @device_list : mei client bus list
|
|
*
|
|
* @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 read_list;
|
|
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;
|
|
wait_queue_head_t wait_stop_wd;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/* used for control messages */
|
|
struct {
|
|
struct mei_msg_hdr hdr;
|
|
unsigned char data[128];
|
|
} wr_msg;
|
|
|
|
struct hbm_version version;
|
|
unsigned int hbm_f_pg_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);
|
|
unsigned long me_client_index;
|
|
|
|
struct mei_cl wd_cl;
|
|
enum mei_wd_states wd_state;
|
|
bool wd_pending;
|
|
u16 wd_timeout;
|
|
unsigned char wd_data[MEI_WD_START_MSG_SIZE];
|
|
|
|
|
|
/* amthif list for cmd waiting */
|
|
struct mei_cl_cb amthif_cmd_list;
|
|
/* driver managed amthif list for reading completed amthif cmd data */
|
|
struct mei_cl_cb amthif_rd_complete_list;
|
|
struct file *iamthif_file_object;
|
|
struct mei_cl iamthif_cl;
|
|
struct mei_cl_cb *iamthif_current_cb;
|
|
long iamthif_open_count;
|
|
int iamthif_mtu;
|
|
unsigned long iamthif_timer;
|
|
u32 iamthif_stall_timer;
|
|
unsigned char *iamthif_msg_buf; /* Note: memory has to be allocated */
|
|
u32 iamthif_msg_buf_size;
|
|
u32 iamthif_msg_buf_index;
|
|
enum iamthif_states iamthif_state;
|
|
bool iamthif_flow_control_pending;
|
|
bool iamthif_ioctl;
|
|
bool iamthif_canceled;
|
|
|
|
struct work_struct init_work;
|
|
struct work_struct reset_work;
|
|
|
|
/* List of bus devices */
|
|
struct list_head device_list;
|
|
|
|
#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);
|
|
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);
|
|
|
|
int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *priv_cb);
|
|
|
|
int mei_amthif_read(struct mei_device *dev, struct file *file,
|
|
char __user *ubuf, size_t length, loff_t *offset);
|
|
|
|
unsigned int mei_amthif_poll(struct mei_device *dev,
|
|
struct file *file, poll_table *wait);
|
|
|
|
int mei_amthif_release(struct mei_device *dev, struct file *file);
|
|
|
|
struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
|
|
struct file *file);
|
|
|
|
void 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_device *dev, struct mei_cl_cb *cb);
|
|
int mei_amthif_irq_read_msg(struct mei_device *dev,
|
|
struct mei_msg_hdr *mei_hdr,
|
|
struct mei_cl_cb *complete_list);
|
|
int mei_amthif_irq_read(struct mei_device *dev, s32 *slots);
|
|
|
|
/*
|
|
* NFC functions
|
|
*/
|
|
int mei_nfc_host_init(struct mei_device *dev);
|
|
void mei_nfc_host_exit(struct mei_device *dev);
|
|
|
|
/*
|
|
* NFC Client UUID
|
|
*/
|
|
extern const uuid_le mei_nfc_guid;
|
|
|
|
int mei_wd_send(struct mei_device *dev);
|
|
int mei_wd_stop(struct mei_device *dev);
|
|
int mei_wd_host_init(struct mei_device *dev);
|
|
/*
|
|
* mei_watchdog_register - Registering watchdog interface
|
|
* once we got connection to the WD Client
|
|
* @dev: mei device
|
|
*/
|
|
int mei_watchdog_register(struct mei_device *dev);
|
|
/*
|
|
* mei_watchdog_unregister - Unregistering watchdog interface
|
|
* @dev: mei device
|
|
*/
|
|
void mei_watchdog_unregister(struct mei_device *dev);
|
|
|
|
/*
|
|
* 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_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,
|
|
unsigned char *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);
|
|
|
|
#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
|