701 lines
22 KiB
C
701 lines
22 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
|
|
*
|
|
*/
|
|
#ifndef _MHI_H_
|
|
#define _MHI_H_
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/dma-direction.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/rwlock_types.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock_types.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
struct mhi_chan;
|
|
struct mhi_event;
|
|
struct mhi_ctxt;
|
|
struct mhi_cmd;
|
|
struct mhi_buf_info;
|
|
|
|
/**
|
|
* enum mhi_callback - MHI callback
|
|
* @MHI_CB_IDLE: MHI entered idle state
|
|
* @MHI_CB_PENDING_DATA: New data available for client to process
|
|
* @MHI_CB_LPM_ENTER: MHI host entered low power mode
|
|
* @MHI_CB_LPM_EXIT: MHI host about to exit low power mode
|
|
* @MHI_CB_EE_RDDM: MHI device entered RDDM exec env
|
|
* @MHI_CB_EE_MISSION_MODE: MHI device entered Mission Mode exec env
|
|
* @MHI_CB_SYS_ERROR: MHI device entered error state (may recover)
|
|
* @MHI_CB_FATAL_ERROR: MHI device entered fatal error state
|
|
* @MHI_CB_BW_REQ: Received a bandwidth switch request from device
|
|
*/
|
|
enum mhi_callback {
|
|
MHI_CB_IDLE,
|
|
MHI_CB_PENDING_DATA,
|
|
MHI_CB_LPM_ENTER,
|
|
MHI_CB_LPM_EXIT,
|
|
MHI_CB_EE_RDDM,
|
|
MHI_CB_EE_MISSION_MODE,
|
|
MHI_CB_SYS_ERROR,
|
|
MHI_CB_FATAL_ERROR,
|
|
MHI_CB_BW_REQ,
|
|
};
|
|
|
|
/**
|
|
* enum mhi_flags - Transfer flags
|
|
* @MHI_EOB: End of buffer for bulk transfer
|
|
* @MHI_EOT: End of transfer
|
|
* @MHI_CHAIN: Linked transfer
|
|
*/
|
|
enum mhi_flags {
|
|
MHI_EOB,
|
|
MHI_EOT,
|
|
MHI_CHAIN,
|
|
};
|
|
|
|
/**
|
|
* enum mhi_device_type - Device types
|
|
* @MHI_DEVICE_XFER: Handles data transfer
|
|
* @MHI_DEVICE_CONTROLLER: Control device
|
|
*/
|
|
enum mhi_device_type {
|
|
MHI_DEVICE_XFER,
|
|
MHI_DEVICE_CONTROLLER,
|
|
};
|
|
|
|
/**
|
|
* enum mhi_ch_type - Channel types
|
|
* @MHI_CH_TYPE_INVALID: Invalid channel type
|
|
* @MHI_CH_TYPE_OUTBOUND: Outbound channel to the device
|
|
* @MHI_CH_TYPE_INBOUND: Inbound channel from the device
|
|
* @MHI_CH_TYPE_INBOUND_COALESCED: Coalesced channel for the device to combine
|
|
* multiple packets and send them as a single
|
|
* large packet to reduce CPU consumption
|
|
*/
|
|
enum mhi_ch_type {
|
|
MHI_CH_TYPE_INVALID = 0,
|
|
MHI_CH_TYPE_OUTBOUND = DMA_TO_DEVICE,
|
|
MHI_CH_TYPE_INBOUND = DMA_FROM_DEVICE,
|
|
MHI_CH_TYPE_INBOUND_COALESCED = 3,
|
|
};
|
|
|
|
/**
|
|
* struct image_info - Firmware and RDDM table table
|
|
* @mhi_buf - Buffer for firmware and RDDM table
|
|
* @entries - # of entries in table
|
|
*/
|
|
struct image_info {
|
|
struct mhi_buf *mhi_buf;
|
|
struct bhi_vec_entry *bhi_vec;
|
|
u32 entries;
|
|
};
|
|
|
|
/**
|
|
* struct mhi_link_info - BW requirement
|
|
* target_link_speed - Link speed as defined by TLS bits in LinkControl reg
|
|
* target_link_width - Link width as defined by NLW bits in LinkStatus reg
|
|
*/
|
|
struct mhi_link_info {
|
|
unsigned int target_link_speed;
|
|
unsigned int target_link_width;
|
|
};
|
|
|
|
/**
|
|
* enum mhi_ee_type - Execution environment types
|
|
* @MHI_EE_PBL: Primary Bootloader
|
|
* @MHI_EE_SBL: Secondary Bootloader
|
|
* @MHI_EE_AMSS: Modem, aka the primary runtime EE
|
|
* @MHI_EE_RDDM: Ram dump download mode
|
|
* @MHI_EE_WFW: WLAN firmware mode
|
|
* @MHI_EE_PTHRU: Passthrough
|
|
* @MHI_EE_EDL: Embedded downloader
|
|
*/
|
|
enum mhi_ee_type {
|
|
MHI_EE_PBL,
|
|
MHI_EE_SBL,
|
|
MHI_EE_AMSS,
|
|
MHI_EE_RDDM,
|
|
MHI_EE_WFW,
|
|
MHI_EE_PTHRU,
|
|
MHI_EE_EDL,
|
|
MHI_EE_MAX_SUPPORTED = MHI_EE_EDL,
|
|
MHI_EE_DISABLE_TRANSITION, /* local EE, not related to mhi spec */
|
|
MHI_EE_NOT_SUPPORTED,
|
|
MHI_EE_MAX,
|
|
};
|
|
|
|
/**
|
|
* enum mhi_state - MHI states
|
|
* @MHI_STATE_RESET: Reset state
|
|
* @MHI_STATE_READY: Ready state
|
|
* @MHI_STATE_M0: M0 state
|
|
* @MHI_STATE_M1: M1 state
|
|
* @MHI_STATE_M2: M2 state
|
|
* @MHI_STATE_M3: M3 state
|
|
* @MHI_STATE_M3_FAST: M3 Fast state
|
|
* @MHI_STATE_BHI: BHI state
|
|
* @MHI_STATE_SYS_ERR: System Error state
|
|
*/
|
|
enum mhi_state {
|
|
MHI_STATE_RESET = 0x0,
|
|
MHI_STATE_READY = 0x1,
|
|
MHI_STATE_M0 = 0x2,
|
|
MHI_STATE_M1 = 0x3,
|
|
MHI_STATE_M2 = 0x4,
|
|
MHI_STATE_M3 = 0x5,
|
|
MHI_STATE_M3_FAST = 0x6,
|
|
MHI_STATE_BHI = 0x7,
|
|
MHI_STATE_SYS_ERR = 0xFF,
|
|
MHI_STATE_MAX,
|
|
};
|
|
|
|
/**
|
|
* enum mhi_ch_ee_mask - Execution environment mask for channel
|
|
* @MHI_CH_EE_PBL: Allow channel to be used in PBL EE
|
|
* @MHI_CH_EE_SBL: Allow channel to be used in SBL EE
|
|
* @MHI_CH_EE_AMSS: Allow channel to be used in AMSS EE
|
|
* @MHI_CH_EE_RDDM: Allow channel to be used in RDDM EE
|
|
* @MHI_CH_EE_PTHRU: Allow channel to be used in PTHRU EE
|
|
* @MHI_CH_EE_WFW: Allow channel to be used in WFW EE
|
|
* @MHI_CH_EE_EDL: Allow channel to be used in EDL EE
|
|
*/
|
|
enum mhi_ch_ee_mask {
|
|
MHI_CH_EE_PBL = BIT(MHI_EE_PBL),
|
|
MHI_CH_EE_SBL = BIT(MHI_EE_SBL),
|
|
MHI_CH_EE_AMSS = BIT(MHI_EE_AMSS),
|
|
MHI_CH_EE_RDDM = BIT(MHI_EE_RDDM),
|
|
MHI_CH_EE_PTHRU = BIT(MHI_EE_PTHRU),
|
|
MHI_CH_EE_WFW = BIT(MHI_EE_WFW),
|
|
MHI_CH_EE_EDL = BIT(MHI_EE_EDL),
|
|
};
|
|
|
|
/**
|
|
* enum mhi_er_data_type - Event ring data types
|
|
* @MHI_ER_DATA: Only client data over this ring
|
|
* @MHI_ER_CTRL: MHI control data and client data
|
|
*/
|
|
enum mhi_er_data_type {
|
|
MHI_ER_DATA,
|
|
MHI_ER_CTRL,
|
|
};
|
|
|
|
/**
|
|
* enum mhi_db_brst_mode - Doorbell mode
|
|
* @MHI_DB_BRST_DISABLE: Burst mode disable
|
|
* @MHI_DB_BRST_ENABLE: Burst mode enable
|
|
*/
|
|
enum mhi_db_brst_mode {
|
|
MHI_DB_BRST_DISABLE = 0x2,
|
|
MHI_DB_BRST_ENABLE = 0x3,
|
|
};
|
|
|
|
/**
|
|
* struct mhi_channel_config - Channel configuration structure for controller
|
|
* @name: The name of this channel
|
|
* @num: The number assigned to this channel
|
|
* @num_elements: The number of elements that can be queued to this channel
|
|
* @local_elements: The local ring length of the channel
|
|
* @event_ring: The event rung index that services this channel
|
|
* @dir: Direction that data may flow on this channel
|
|
* @type: Channel type
|
|
* @ee_mask: Execution Environment mask for this channel
|
|
* @pollcfg: Polling configuration for burst mode. 0 is default. milliseconds
|
|
for UL channels, multiple of 8 ring elements for DL channels
|
|
* @doorbell: Doorbell mode
|
|
* @lpm_notify: The channel master requires low power mode notifications
|
|
* @offload_channel: The client manages the channel completely
|
|
* @doorbell_mode_switch: Channel switches to doorbell mode on M0 transition
|
|
* @auto_queue: Framework will automatically queue buffers for DL traffic
|
|
* @auto_start: Automatically start (open) this channel
|
|
* @wake-capable: Channel capable of waking up the system
|
|
*/
|
|
struct mhi_channel_config {
|
|
char *name;
|
|
u32 num;
|
|
u32 num_elements;
|
|
u32 local_elements;
|
|
u32 event_ring;
|
|
enum dma_data_direction dir;
|
|
enum mhi_ch_type type;
|
|
u32 ee_mask;
|
|
u32 pollcfg;
|
|
enum mhi_db_brst_mode doorbell;
|
|
bool lpm_notify;
|
|
bool offload_channel;
|
|
bool doorbell_mode_switch;
|
|
bool auto_queue;
|
|
bool auto_start;
|
|
bool wake_capable;
|
|
};
|
|
|
|
/**
|
|
* struct mhi_event_config - Event ring configuration structure for controller
|
|
* @num_elements: The number of elements that can be queued to this ring
|
|
* @irq_moderation_ms: Delay irq for additional events to be aggregated
|
|
* @irq: IRQ associated with this ring
|
|
* @channel: Dedicated channel number. U32_MAX indicates a non-dedicated ring
|
|
* @priority: Priority of this ring. Use 1 for now
|
|
* @mode: Doorbell mode
|
|
* @data_type: Type of data this ring will process
|
|
* @hardware_event: This ring is associated with hardware channels
|
|
* @client_managed: This ring is client managed
|
|
* @offload_channel: This ring is associated with an offloaded channel
|
|
*/
|
|
struct mhi_event_config {
|
|
u32 num_elements;
|
|
u32 irq_moderation_ms;
|
|
u32 irq;
|
|
u32 channel;
|
|
u32 priority;
|
|
enum mhi_db_brst_mode mode;
|
|
enum mhi_er_data_type data_type;
|
|
bool hardware_event;
|
|
bool client_managed;
|
|
bool offload_channel;
|
|
};
|
|
|
|
/**
|
|
* struct mhi_controller_config - Root MHI controller configuration
|
|
* @max_channels: Maximum number of channels supported
|
|
* @timeout_ms: Timeout value for operations. 0 means use default
|
|
* @buf_len: Size of automatically allocated buffers. 0 means use default
|
|
* @num_channels: Number of channels defined in @ch_cfg
|
|
* @ch_cfg: Array of defined channels
|
|
* @num_events: Number of event rings defined in @event_cfg
|
|
* @event_cfg: Array of defined event rings
|
|
* @use_bounce_buf: Use a bounce buffer pool due to limited DDR access
|
|
* @m2_no_db: Host is not allowed to ring DB in M2 state
|
|
*/
|
|
struct mhi_controller_config {
|
|
u32 max_channels;
|
|
u32 timeout_ms;
|
|
u32 buf_len;
|
|
u32 num_channels;
|
|
struct mhi_channel_config *ch_cfg;
|
|
u32 num_events;
|
|
struct mhi_event_config *event_cfg;
|
|
bool use_bounce_buf;
|
|
bool m2_no_db;
|
|
};
|
|
|
|
/**
|
|
* struct mhi_controller - Master MHI controller structure
|
|
* @cntrl_dev: Pointer to the struct device of physical bus acting as the MHI
|
|
* controller (required)
|
|
* @mhi_dev: MHI device instance for the controller
|
|
* @regs: Base address of MHI MMIO register space (required)
|
|
* @bhi: Points to base of MHI BHI register space
|
|
* @bhie: Points to base of MHI BHIe register space
|
|
* @wake_db: MHI WAKE doorbell register address
|
|
* @iova_start: IOMMU starting address for data (required)
|
|
* @iova_stop: IOMMU stop address for data (required)
|
|
* @fw_image: Firmware image name for normal booting (required)
|
|
* @edl_image: Firmware image name for emergency download mode (optional)
|
|
* @rddm_size: RAM dump size that host should allocate for debugging purpose
|
|
* @sbl_size: SBL image size downloaded through BHIe (optional)
|
|
* @seg_len: BHIe vector size (optional)
|
|
* @fbc_image: Points to firmware image buffer
|
|
* @rddm_image: Points to RAM dump buffer
|
|
* @mhi_chan: Points to the channel configuration table
|
|
* @lpm_chans: List of channels that require LPM notifications
|
|
* @irq: base irq # to request (required)
|
|
* @max_chan: Maximum number of channels the controller supports
|
|
* @total_ev_rings: Total # of event rings allocated
|
|
* @hw_ev_rings: Number of hardware event rings
|
|
* @sw_ev_rings: Number of software event rings
|
|
* @nr_irqs_req: Number of IRQs required to operate (optional)
|
|
* @nr_irqs: Number of IRQ allocated by bus master (required)
|
|
* @family_number: MHI controller family number
|
|
* @device_number: MHI controller device number
|
|
* @major_version: MHI controller major revision number
|
|
* @minor_version: MHI controller minor revision number
|
|
* @mhi_event: MHI event ring configurations table
|
|
* @mhi_cmd: MHI command ring configurations table
|
|
* @mhi_ctxt: MHI device context, shared memory between host and device
|
|
* @pm_mutex: Mutex for suspend/resume operation
|
|
* @pm_lock: Lock for protecting MHI power management state
|
|
* @timeout_ms: Timeout in ms for state transitions
|
|
* @pm_state: MHI power management state
|
|
* @db_access: DB access states
|
|
* @ee: MHI device execution environment
|
|
* @dev_state: MHI device state
|
|
* @dev_wake: Device wakeup count
|
|
* @pending_pkts: Pending packets for the controller
|
|
* @transition_list: List of MHI state transitions
|
|
* @transition_lock: Lock for protecting MHI state transition list
|
|
* @wlock: Lock for protecting device wakeup
|
|
* @mhi_link_info: Device bandwidth info
|
|
* @st_worker: State transition worker
|
|
* @fw_worker: Firmware download worker
|
|
* @syserr_worker: System error worker
|
|
* @state_event: State change event
|
|
* @status_cb: CB function to notify power states of the device (required)
|
|
* @link_status: CB function to query link status of the device (required)
|
|
* @wake_get: CB function to assert device wake (optional)
|
|
* @wake_put: CB function to de-assert device wake (optional)
|
|
* @wake_toggle: CB function to assert and de-assert device wake (optional)
|
|
* @runtime_get: CB function to controller runtime resume (required)
|
|
* @runtimet_put: CB function to decrement pm usage (required)
|
|
* @map_single: CB function to create TRE buffer
|
|
* @unmap_single: CB function to destroy TRE buffer
|
|
* @buffer_len: Bounce buffer length
|
|
* @bounce_buf: Use of bounce buffer
|
|
* @fbc_download: MHI host needs to do complete image transfer (optional)
|
|
* @pre_init: MHI host needs to do pre-initialization before power up
|
|
* @wake_set: Device wakeup set flag
|
|
*
|
|
* Fields marked as (required) need to be populated by the controller driver
|
|
* before calling mhi_register_controller(). For the fields marked as (optional)
|
|
* they can be populated depending on the usecase.
|
|
*
|
|
* The following fields are present for the purpose of implementing any device
|
|
* specific quirks or customizations for specific MHI revisions used in device
|
|
* by the controller drivers. The MHI stack will just populate these fields
|
|
* during mhi_register_controller():
|
|
* family_number
|
|
* device_number
|
|
* major_version
|
|
* minor_version
|
|
*/
|
|
struct mhi_controller {
|
|
struct device *cntrl_dev;
|
|
struct mhi_device *mhi_dev;
|
|
void __iomem *regs;
|
|
void __iomem *bhi;
|
|
void __iomem *bhie;
|
|
void __iomem *wake_db;
|
|
|
|
dma_addr_t iova_start;
|
|
dma_addr_t iova_stop;
|
|
const char *fw_image;
|
|
const char *edl_image;
|
|
size_t rddm_size;
|
|
size_t sbl_size;
|
|
size_t seg_len;
|
|
struct image_info *fbc_image;
|
|
struct image_info *rddm_image;
|
|
struct mhi_chan *mhi_chan;
|
|
struct list_head lpm_chans;
|
|
int *irq;
|
|
u32 max_chan;
|
|
u32 total_ev_rings;
|
|
u32 hw_ev_rings;
|
|
u32 sw_ev_rings;
|
|
u32 nr_irqs_req;
|
|
u32 nr_irqs;
|
|
u32 family_number;
|
|
u32 device_number;
|
|
u32 major_version;
|
|
u32 minor_version;
|
|
|
|
struct mhi_event *mhi_event;
|
|
struct mhi_cmd *mhi_cmd;
|
|
struct mhi_ctxt *mhi_ctxt;
|
|
|
|
struct mutex pm_mutex;
|
|
rwlock_t pm_lock;
|
|
u32 timeout_ms;
|
|
u32 pm_state;
|
|
u32 db_access;
|
|
enum mhi_ee_type ee;
|
|
enum mhi_state dev_state;
|
|
atomic_t dev_wake;
|
|
atomic_t pending_pkts;
|
|
struct list_head transition_list;
|
|
spinlock_t transition_lock;
|
|
spinlock_t wlock;
|
|
struct mhi_link_info mhi_link_info;
|
|
struct work_struct st_worker;
|
|
struct work_struct fw_worker;
|
|
struct work_struct syserr_worker;
|
|
wait_queue_head_t state_event;
|
|
|
|
void (*status_cb)(struct mhi_controller *mhi_cntrl,
|
|
enum mhi_callback cb);
|
|
int (*link_status)(struct mhi_controller *mhi_cntrl);
|
|
void (*wake_get)(struct mhi_controller *mhi_cntrl, bool override);
|
|
void (*wake_put)(struct mhi_controller *mhi_cntrl, bool override);
|
|
void (*wake_toggle)(struct mhi_controller *mhi_cntrl);
|
|
int (*runtime_get)(struct mhi_controller *mhi_cntrl);
|
|
void (*runtime_put)(struct mhi_controller *mhi_cntrl);
|
|
int (*map_single)(struct mhi_controller *mhi_cntrl,
|
|
struct mhi_buf_info *buf);
|
|
void (*unmap_single)(struct mhi_controller *mhi_cntrl,
|
|
struct mhi_buf_info *buf);
|
|
|
|
size_t buffer_len;
|
|
bool bounce_buf;
|
|
bool fbc_download;
|
|
bool pre_init;
|
|
bool wake_set;
|
|
};
|
|
|
|
/**
|
|
* struct mhi_device - Structure representing a MHI device which binds
|
|
* to channels
|
|
* @id: Pointer to MHI device ID struct
|
|
* @chan_name: Name of the channel to which the device binds
|
|
* @mhi_cntrl: Controller the device belongs to
|
|
* @ul_chan: UL channel for the device
|
|
* @dl_chan: DL channel for the device
|
|
* @dev: Driver model device node for the MHI device
|
|
* @dev_type: MHI device type
|
|
* @ul_chan_id: MHI channel id for UL transfer
|
|
* @dl_chan_id: MHI channel id for DL transfer
|
|
* @dev_wake: Device wakeup counter
|
|
*/
|
|
struct mhi_device {
|
|
const struct mhi_device_id *id;
|
|
const char *chan_name;
|
|
struct mhi_controller *mhi_cntrl;
|
|
struct mhi_chan *ul_chan;
|
|
struct mhi_chan *dl_chan;
|
|
struct device dev;
|
|
enum mhi_device_type dev_type;
|
|
int ul_chan_id;
|
|
int dl_chan_id;
|
|
u32 dev_wake;
|
|
};
|
|
|
|
/**
|
|
* struct mhi_result - Completed buffer information
|
|
* @buf_addr: Address of data buffer
|
|
* @bytes_xferd: # of bytes transferred
|
|
* @dir: Channel direction
|
|
* @transaction_status: Status of last transaction
|
|
*/
|
|
struct mhi_result {
|
|
void *buf_addr;
|
|
size_t bytes_xferd;
|
|
enum dma_data_direction dir;
|
|
int transaction_status;
|
|
};
|
|
|
|
/**
|
|
* struct mhi_buf - MHI Buffer description
|
|
* @buf: Virtual address of the buffer
|
|
* @name: Buffer label. For offload channel, configurations name must be:
|
|
* ECA - Event context array data
|
|
* CCA - Channel context array data
|
|
* @dma_addr: IOMMU address of the buffer
|
|
* @len: # of bytes
|
|
*/
|
|
struct mhi_buf {
|
|
void *buf;
|
|
const char *name;
|
|
dma_addr_t dma_addr;
|
|
size_t len;
|
|
};
|
|
|
|
/**
|
|
* struct mhi_driver - Structure representing a MHI client driver
|
|
* @probe: CB function for client driver probe function
|
|
* @remove: CB function for client driver remove function
|
|
* @ul_xfer_cb: CB function for UL data transfer
|
|
* @dl_xfer_cb: CB function for DL data transfer
|
|
* @status_cb: CB functions for asynchronous status
|
|
* @driver: Device driver model driver
|
|
*/
|
|
struct mhi_driver {
|
|
const struct mhi_device_id *id_table;
|
|
int (*probe)(struct mhi_device *mhi_dev,
|
|
const struct mhi_device_id *id);
|
|
void (*remove)(struct mhi_device *mhi_dev);
|
|
void (*ul_xfer_cb)(struct mhi_device *mhi_dev,
|
|
struct mhi_result *result);
|
|
void (*dl_xfer_cb)(struct mhi_device *mhi_dev,
|
|
struct mhi_result *result);
|
|
void (*status_cb)(struct mhi_device *mhi_dev, enum mhi_callback mhi_cb);
|
|
struct device_driver driver;
|
|
};
|
|
|
|
#define to_mhi_driver(drv) container_of(drv, struct mhi_driver, driver)
|
|
#define to_mhi_device(dev) container_of(dev, struct mhi_device, dev)
|
|
|
|
/**
|
|
* mhi_register_controller - Register MHI controller
|
|
* @mhi_cntrl: MHI controller to register
|
|
* @config: Configuration to use for the controller
|
|
*/
|
|
int mhi_register_controller(struct mhi_controller *mhi_cntrl,
|
|
struct mhi_controller_config *config);
|
|
|
|
/**
|
|
* mhi_unregister_controller - Unregister MHI controller
|
|
* @mhi_cntrl: MHI controller to unregister
|
|
*/
|
|
void mhi_unregister_controller(struct mhi_controller *mhi_cntrl);
|
|
|
|
/*
|
|
* module_mhi_driver() - Helper macro for drivers that don't do
|
|
* anything special other than using default mhi_driver_register() and
|
|
* mhi_driver_unregister(). This eliminates a lot of boilerplate.
|
|
* Each module may only use this macro once.
|
|
*/
|
|
#define module_mhi_driver(mhi_drv) \
|
|
module_driver(mhi_drv, mhi_driver_register, \
|
|
mhi_driver_unregister)
|
|
|
|
/*
|
|
* Macro to avoid include chaining to get THIS_MODULE
|
|
*/
|
|
#define mhi_driver_register(mhi_drv) \
|
|
__mhi_driver_register(mhi_drv, THIS_MODULE)
|
|
|
|
/**
|
|
* __mhi_driver_register - Register driver with MHI framework
|
|
* @mhi_drv: Driver associated with the device
|
|
* @owner: The module owner
|
|
*/
|
|
int __mhi_driver_register(struct mhi_driver *mhi_drv, struct module *owner);
|
|
|
|
/**
|
|
* mhi_driver_unregister - Unregister a driver for mhi_devices
|
|
* @mhi_drv: Driver associated with the device
|
|
*/
|
|
void mhi_driver_unregister(struct mhi_driver *mhi_drv);
|
|
|
|
/**
|
|
* mhi_set_mhi_state - Set MHI device state
|
|
* @mhi_cntrl: MHI controller
|
|
* @state: State to set
|
|
*/
|
|
void mhi_set_mhi_state(struct mhi_controller *mhi_cntrl,
|
|
enum mhi_state state);
|
|
|
|
/**
|
|
* mhi_prepare_for_power_up - Do pre-initialization before power up.
|
|
* This is optional, call this before power up if
|
|
* the controller does not want bus framework to
|
|
* automatically free any allocated memory during
|
|
* shutdown process.
|
|
* @mhi_cntrl: MHI controller
|
|
*/
|
|
int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl);
|
|
|
|
/**
|
|
* mhi_async_power_up - Start MHI power up sequence
|
|
* @mhi_cntrl: MHI controller
|
|
*/
|
|
int mhi_async_power_up(struct mhi_controller *mhi_cntrl);
|
|
|
|
/**
|
|
* mhi_sync_power_up - Start MHI power up sequence and wait till the device
|
|
* device enters valid EE state
|
|
* @mhi_cntrl: MHI controller
|
|
*/
|
|
int mhi_sync_power_up(struct mhi_controller *mhi_cntrl);
|
|
|
|
/**
|
|
* mhi_power_down - Start MHI power down sequence
|
|
* @mhi_cntrl: MHI controller
|
|
* @graceful: Link is still accessible, so do a graceful shutdown process
|
|
*/
|
|
void mhi_power_down(struct mhi_controller *mhi_cntrl, bool graceful);
|
|
|
|
/**
|
|
* mhi_unprepare_after_power_down - Free any allocated memory after power down
|
|
* @mhi_cntrl: MHI controller
|
|
*/
|
|
void mhi_unprepare_after_power_down(struct mhi_controller *mhi_cntrl);
|
|
|
|
/**
|
|
* mhi_download_rddm_img - Download ramdump image from device for
|
|
* debugging purpose.
|
|
* @mhi_cntrl: MHI controller
|
|
* @in_panic: Download rddm image during kernel panic
|
|
*/
|
|
int mhi_download_rddm_img(struct mhi_controller *mhi_cntrl, bool in_panic);
|
|
|
|
/**
|
|
* mhi_force_rddm_mode - Force device into rddm mode
|
|
* @mhi_cntrl: MHI controller
|
|
*/
|
|
int mhi_force_rddm_mode(struct mhi_controller *mhi_cntrl);
|
|
|
|
/**
|
|
* mhi_get_mhi_state - Get MHI state of the device
|
|
* @mhi_cntrl: MHI controller
|
|
*/
|
|
enum mhi_state mhi_get_mhi_state(struct mhi_controller *mhi_cntrl);
|
|
|
|
/**
|
|
* mhi_device_get - Disable device low power mode
|
|
* @mhi_dev: Device associated with the channel
|
|
*/
|
|
void mhi_device_get(struct mhi_device *mhi_dev);
|
|
|
|
/**
|
|
* mhi_device_get_sync - Disable device low power mode. Synchronously
|
|
* take the controller out of suspended state
|
|
* @mhi_dev: Device associated with the channel
|
|
*/
|
|
int mhi_device_get_sync(struct mhi_device *mhi_dev);
|
|
|
|
/**
|
|
* mhi_device_put - Re-enable device low power mode
|
|
* @mhi_dev: Device associated with the channel
|
|
*/
|
|
void mhi_device_put(struct mhi_device *mhi_dev);
|
|
|
|
/**
|
|
* mhi_prepare_for_transfer - Setup channel for data transfer
|
|
* @mhi_dev: Device associated with the channels
|
|
*/
|
|
int mhi_prepare_for_transfer(struct mhi_device *mhi_dev);
|
|
|
|
/**
|
|
* mhi_unprepare_from_transfer - Unprepare the channels
|
|
* @mhi_dev: Device associated with the channels
|
|
*/
|
|
void mhi_unprepare_from_transfer(struct mhi_device *mhi_dev);
|
|
|
|
/**
|
|
* mhi_poll - Poll for any available data in DL direction
|
|
* @mhi_dev: Device associated with the channels
|
|
* @budget: # of events to process
|
|
*/
|
|
int mhi_poll(struct mhi_device *mhi_dev, u32 budget);
|
|
|
|
/**
|
|
* mhi_queue_dma - Send or receive DMA mapped buffers from client device
|
|
* over MHI channel
|
|
* @mhi_dev: Device associated with the channels
|
|
* @dir: DMA direction for the channel
|
|
* @mhi_buf: Buffer for holding the DMA mapped data
|
|
* @len: Buffer length
|
|
* @mflags: MHI transfer flags used for the transfer
|
|
*/
|
|
int mhi_queue_dma(struct mhi_device *mhi_dev, enum dma_data_direction dir,
|
|
struct mhi_buf *mhi_buf, size_t len, enum mhi_flags mflags);
|
|
|
|
/**
|
|
* mhi_queue_buf - Send or receive raw buffers from client device over MHI
|
|
* channel
|
|
* @mhi_dev: Device associated with the channels
|
|
* @dir: DMA direction for the channel
|
|
* @buf: Buffer for holding the data
|
|
* @len: Buffer length
|
|
* @mflags: MHI transfer flags used for the transfer
|
|
*/
|
|
int mhi_queue_buf(struct mhi_device *mhi_dev, enum dma_data_direction dir,
|
|
void *buf, size_t len, enum mhi_flags mflags);
|
|
|
|
/**
|
|
* mhi_queue_skb - Send or receive SKBs from client device over MHI channel
|
|
* @mhi_dev: Device associated with the channels
|
|
* @dir: DMA direction for the channel
|
|
* @skb: Buffer for holding SKBs
|
|
* @len: Buffer length
|
|
* @mflags: MHI transfer flags used for the transfer
|
|
*/
|
|
int mhi_queue_skb(struct mhi_device *mhi_dev, enum dma_data_direction dir,
|
|
struct sk_buff *skb, size_t len, enum mhi_flags mflags);
|
|
|
|
#endif /* _MHI_H_ */
|