94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2015 MediaTek Inc.
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*/
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#include <linux/completion.h>
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#ifndef _ENGINE_REQUESTS_H_
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#define _ENGINE_REQUESTS_H_
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#define MAX_REQUEST_SIZE_PER_ENGINE 4
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#define MAX_FRAMES_PER_REQUEST 6
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/* Regulation Options */
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#define FRAME_BASE_REGULATION 0
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#define REQUEST_BASE_REGULATION 1
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#define REQUEST_REGULATION FRAME_BASE_REGULATION
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enum FRAME_STATUS_ENUM {
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FRAME_STATUS_EMPTY, /* 0 */
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FRAME_STATUS_ENQUE, /* 1 */
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FRAME_STATUS_RUNNING, /* 2 */
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FRAME_STATUS_FINISHED, /* 3 */
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FRAME_STATUS_TOTAL
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};
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enum REQUEST_STATE_ENUM {
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REQUEST_STATE_EMPTY, /* 0 */
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REQUEST_STATE_PENDING, /* 1 */
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REQUEST_STATE_RUNNING, /* 2 */
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REQUEST_STATE_FINISHED, /* 3 */
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REQUEST_STATE_TOTAL
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};
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struct ring_ctrl {
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unsigned int wcnt; /* enque */
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unsigned int rcnt; /* deque */
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unsigned int icnt; /* IRQ ringing counter w/o reset */
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unsigned int gcnt; /* GCE */
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unsigned int size;
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/* init MAX_REQUEST_SIZE_PER_ENGINE MAX_FRAMES_PER_REQUEST */
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};
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struct frame {
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enum FRAME_STATUS_ENUM state;
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void *data; /* points to engine data */
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};
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struct request {
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enum REQUEST_STATE_ENUM state;
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pid_t pid;
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struct ring_ctrl fctl;
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struct frame frames[MAX_FRAMES_PER_REQUEST];
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bool pending_run; /* pending frame in a running request */
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};
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struct engine_ops {
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int (*req_enque_cb)(struct frame *frames, void *req);
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int (*req_deque_cb)(struct frame *frames, void *req);
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int (*frame_handler)(struct frame *frame);
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int (*req_feedback_cb)(struct frame *frame);
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};
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struct engine_requests {
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struct ring_ctrl req_ctl;
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struct request reqs[MAX_REQUEST_SIZE_PER_ENGINE];
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const struct engine_ops *ops;
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struct completion req_handler_done;
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bool req_running;
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seqlock_t seqlock;
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};
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signed int init_ring_ctl(struct ring_ctrl *rctl);
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signed int init_request(struct request *req);
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signed int set_frame_data(struct frame *f, void *engine);
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signed int register_requests(struct engine_requests *eng, size_t size);
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signed int unregister_requests(struct engine_requests *eng);
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signed int request_handler(struct engine_requests *eng, spinlock_t *lock);
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/*TODO: APIs to manipulate requests */
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int set_engine_ops(struct engine_requests *eng, const struct engine_ops *ops);
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signed int enque_request(struct engine_requests *eng, unsigned int fcnt,
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void *req, pid_t pid);
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signed int deque_request(struct engine_requests *eng, unsigned int *fcnt,
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void *req);
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int update_request(struct engine_requests *eng, pid_t *pid);
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bool request_running(struct engine_requests *eng);
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signed int request_dump(struct engine_requests *eng);
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#endif
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