mirror of
https://github.com/torvalds/linux.git
synced 2024-12-11 21:52:04 +00:00
3b575260cb
1) Bottom half(tasklet) for IRQ and task processing. 2) Tasks are processed asynchronous and synchronously. Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only
|
|
*
|
|
* Copyright (C) 2020-21 Intel Corporation.
|
|
*/
|
|
|
|
#ifndef IOSM_IPC_TASK_QUEUE_H
|
|
#define IOSM_IPC_TASK_QUEUE_H
|
|
|
|
/* Number of available element for the input message queue of the IPC
|
|
* ipc_task
|
|
*/
|
|
#define IPC_THREAD_QUEUE_SIZE 256
|
|
|
|
/**
|
|
* struct ipc_task_queue_args - Struct for Task queue elements
|
|
* @ipc_imem: Pointer to struct iosm_imem
|
|
* @msg: Message argument for tasklet function. (optional, can be NULL)
|
|
* @completion: OS object used to wait for the tasklet function to finish for
|
|
* synchronous calls
|
|
* @func: Function to be called in tasklet (tl) context
|
|
* @arg: Generic integer argument for tasklet function (optional)
|
|
* @size: Message size argument for tasklet function (optional)
|
|
* @response: Return code of tasklet function for synchronous calls
|
|
* @is_copy: Is true if msg contains a pointer to a copy of the original msg
|
|
* for async. calls that needs to be freed once the tasklet returns
|
|
*/
|
|
struct ipc_task_queue_args {
|
|
struct iosm_imem *ipc_imem;
|
|
void *msg;
|
|
struct completion *completion;
|
|
int (*func)(struct iosm_imem *ipc_imem, int arg, void *msg,
|
|
size_t size);
|
|
int arg;
|
|
size_t size;
|
|
int response;
|
|
u8 is_copy:1;
|
|
};
|
|
|
|
/**
|
|
* struct ipc_task_queue - Struct for Task queue
|
|
* @q_lock: Protect the message queue of the ipc ipc_task
|
|
* @args: Message queue of the IPC ipc_task
|
|
* @q_rpos: First queue element to process.
|
|
* @q_wpos: First free element of the input queue.
|
|
*/
|
|
struct ipc_task_queue {
|
|
spinlock_t q_lock; /* for atomic operation on queue */
|
|
struct ipc_task_queue_args args[IPC_THREAD_QUEUE_SIZE];
|
|
unsigned int q_rpos;
|
|
unsigned int q_wpos;
|
|
};
|
|
|
|
/**
|
|
* struct ipc_task - Struct for Task
|
|
* @dev: Pointer to device structure
|
|
* @ipc_tasklet: Tasklet for serialized work offload
|
|
* from interrupts and OS callbacks
|
|
* @ipc_queue: Task for entry into ipc task queue
|
|
*/
|
|
struct ipc_task {
|
|
struct device *dev;
|
|
struct tasklet_struct *ipc_tasklet;
|
|
struct ipc_task_queue ipc_queue;
|
|
};
|
|
|
|
/**
|
|
* ipc_task_init - Allocate a tasklet
|
|
* @ipc_task: Pointer to ipc_task structure
|
|
* Returns: 0 on success and failure value on error.
|
|
*/
|
|
int ipc_task_init(struct ipc_task *ipc_task);
|
|
|
|
/**
|
|
* ipc_task_deinit - Free a tasklet, invalidating its pointer.
|
|
* @ipc_task: Pointer to ipc_task structure
|
|
*/
|
|
void ipc_task_deinit(struct ipc_task *ipc_task);
|
|
|
|
/**
|
|
* ipc_task_queue_send_task - Synchronously/Asynchronously call a function in
|
|
* tasklet context.
|
|
* @imem: Pointer to iosm_imem struct
|
|
* @func: Function to be called in tasklet context
|
|
* @arg: Integer argument for func
|
|
* @msg: Message pointer argument for func
|
|
* @size: Size argument for func
|
|
* @wait: if true wait for result
|
|
*
|
|
* Returns: Result value returned by func or failure value if func could not
|
|
* be called.
|
|
*/
|
|
int ipc_task_queue_send_task(struct iosm_imem *imem,
|
|
int (*func)(struct iosm_imem *ipc_imem, int arg,
|
|
void *msg, size_t size),
|
|
int arg, void *msg, size_t size, bool wait);
|
|
|
|
#endif
|