98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only
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*
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* Copyright (C) 2020-21 Intel Corporation.
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*/
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#ifndef IOSM_IPC_TASK_QUEUE_H
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#define IOSM_IPC_TASK_QUEUE_H
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/* Number of available element for the input message queue of the IPC
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* ipc_task
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*/
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#define IPC_THREAD_QUEUE_SIZE 256
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/**
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* struct ipc_task_queue_args - Struct for Task queue elements
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* @ipc_imem: Pointer to struct iosm_imem
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* @msg: Message argument for tasklet function. (optional, can be NULL)
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* @completion: OS object used to wait for the tasklet function to finish for
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* synchronous calls
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* @func: Function to be called in tasklet (tl) context
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* @arg: Generic integer argument for tasklet function (optional)
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* @size: Message size argument for tasklet function (optional)
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* @response: Return code of tasklet function for synchronous calls
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* @is_copy: Is true if msg contains a pointer to a copy of the original msg
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* for async. calls that needs to be freed once the tasklet returns
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*/
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struct ipc_task_queue_args {
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struct iosm_imem *ipc_imem;
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void *msg;
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struct completion *completion;
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int (*func)(struct iosm_imem *ipc_imem, int arg, void *msg,
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size_t size);
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int arg;
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size_t size;
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int response;
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u8 is_copy:1;
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};
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/**
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* struct ipc_task_queue - Struct for Task queue
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* @q_lock: Protect the message queue of the ipc ipc_task
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* @args: Message queue of the IPC ipc_task
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* @q_rpos: First queue element to process.
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* @q_wpos: First free element of the input queue.
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*/
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struct ipc_task_queue {
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spinlock_t q_lock; /* for atomic operation on queue */
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struct ipc_task_queue_args args[IPC_THREAD_QUEUE_SIZE];
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unsigned int q_rpos;
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unsigned int q_wpos;
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};
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/**
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* struct ipc_task - Struct for Task
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* @dev: Pointer to device structure
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* @ipc_tasklet: Tasklet for serialized work offload
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* from interrupts and OS callbacks
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* @ipc_queue: Task for entry into ipc task queue
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*/
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struct ipc_task {
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struct device *dev;
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struct tasklet_struct *ipc_tasklet;
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struct ipc_task_queue ipc_queue;
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};
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/**
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* ipc_task_init - Allocate a tasklet
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* @ipc_task: Pointer to ipc_task structure
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* Returns: 0 on success and failure value on error.
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*/
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int ipc_task_init(struct ipc_task *ipc_task);
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/**
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* ipc_task_deinit - Free a tasklet, invalidating its pointer.
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* @ipc_task: Pointer to ipc_task structure
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*/
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void ipc_task_deinit(struct ipc_task *ipc_task);
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/**
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* ipc_task_queue_send_task - Synchronously/Asynchronously call a function in
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* tasklet context.
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* @imem: Pointer to iosm_imem struct
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* @func: Function to be called in tasklet context
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* @arg: Integer argument for func
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* @msg: Message pointer argument for func
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* @size: Size argument for func
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* @wait: if true wait for result
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*
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* Returns: Result value returned by func or failure value if func could not
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* be called.
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*/
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int ipc_task_queue_send_task(struct iosm_imem *imem,
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int (*func)(struct iosm_imem *ipc_imem, int arg,
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void *msg, size_t size),
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int arg, void *msg, size_t size, bool wait);
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#endif
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