646 lines
14 KiB
C
646 lines
14 KiB
C
// 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/types.h>
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#include <linux/stddef.h>
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#include <linux/vmalloc.h>
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#include <linux/spinlock.h>
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#include <linux/printk.h>
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#include <linux/module.h>
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#include <linux/seqlock.h>
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#include <linux/irqflags.h>
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#include "engine_request.h"
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/*
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* module control
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*/
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#define TODO
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MODULE_DESCRIPTION("Stand Alone Engine Request");
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MODULE_AUTHOR("MM3SW5");
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MODULE_LICENSE("GPL");
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unsigned int egn_debug;
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module_param(egn_debug, uint, 0644);
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MODULE_PARM_DESC(egn_debug, " activates debug info");
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#define MyTag "[STALN]"
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#define LOG_VRB(format, args...) \
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pr_debug(MyTag "[%s] " format, __func__, ##args)
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#define LOG_DBG(format, args...) \
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do { \
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if (egn_debug >= 2) \
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pr_info(MyTag "[%s] " format, __func__, ##args); \
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} while (0)
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#define LOG_INF(format, args...) \
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do { \
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if (egn_debug >= 1) \
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pr_info(MyTag "[%s] " format, __func__, ##args);\
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} while (0)
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#define LOG_WRN(format, args...) \
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do { \
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if (egn_debug >= 0) \
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pr_info(MyTag "[%s] " format, __func__, ##args); \
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} while (0)
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#define LOG_ERR(format, args...) \
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do { \
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if (egn_debug >= 0) \
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pr_info(MyTag "[%s] " format, __func__, ##args); \
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} while (0)
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/*
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* Single ring ctl init
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*/
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signed int init_ring_ctl(struct ring_ctrl *rctl)
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{
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if (!rctl)
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return -1;
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rctl->wcnt = 0;
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rctl->rcnt = 0;
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rctl->icnt = 0;
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rctl->gcnt = 0;
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rctl->size = 0;
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return 0;
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}
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signed int set_ring_size(struct ring_ctrl *rctl, unsigned int size)
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{
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if (!rctl)
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return -1;
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rctl->size = size;
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return 0;
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}
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signed int init_frame(struct frame *frame)
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{
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if (!frame)
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return -1;
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frame->state = FRAME_STATUS_EMPTY;
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return 0;
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}
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/*
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* single request init
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*/
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signed int init_request(struct request *req)
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{
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int f;
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if (!req)
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return -1;
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req->state = REQUEST_STATE_EMPTY;
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init_ring_ctl(&req->fctl);
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set_ring_size(&req->fctl, MAX_FRAMES_PER_REQUEST);
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for (f = 0; f < MAX_FRAMES_PER_REQUEST; f++)
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init_frame(&req->frames[f]);
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req->pending_run = false;
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return 0;
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}
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/*
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* per-frame data init
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*/
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signed int set_frame_data(struct frame *f, void *engine)
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{
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if (!f) {
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LOG_ERR("NULL frame(%p)", (void *)f);
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return -1;
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}
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f->data = engine;
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return 0;
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}
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/*
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* TOP : per-sub-engine
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* Size Limitaion: eng_reqs : [MAX_REQUEST_SIZE_PER_ENGINE]
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* data : [MAX_REQUEST_SIZE_PER_ENGINE][MAX_FRAMES_PER_REQUEST]
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*/
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signed int register_requests(struct engine_requests *eng, size_t size)
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{
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int f, r, d;
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char *_data;
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size_t len;
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if (!eng)
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return -1;
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init_ring_ctl(&eng->req_ctl);
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set_ring_size(&eng->req_ctl, MAX_REQUEST_SIZE_PER_ENGINE);
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/* TODO: KE Risk : array out of bound */
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len = (size * MAX_FRAMES_PER_REQUEST) * MAX_REQUEST_SIZE_PER_ENGINE;
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_data = vmalloc(len);
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if (!_data) {
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LOG_INF("[%s] vmalloc failed", __func__);
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return -1;
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}
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memset(_data, 0x0, len);
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LOG_INF("[%s]Engine struct total size is %zu", __func__, len);
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for (r = 0; r < MAX_REQUEST_SIZE_PER_ENGINE; r++) {
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init_request(&eng->reqs[r]);
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for (f = 0; f < MAX_FRAMES_PER_REQUEST; f++) {
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d = (r * MAX_FRAMES_PER_REQUEST + f) * size;
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set_frame_data(&eng->reqs[r].frames[f], &_data[d]);
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}
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}
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/*seqlock_init(&eng->seqlock);*/
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local_irq_disable();
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write_seqlock(&eng->seqlock);
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eng->req_running = false;
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write_sequnlock(&eng->seqlock);
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local_irq_enable();
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/* init and inc for 1st request_handler use */
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init_completion(&eng->req_handler_done);
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complete(&eng->req_handler_done);
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return 0;
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}
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EXPORT_SYMBOL(register_requests);
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signed int unregister_requests(struct engine_requests *eng)
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{
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int f, r;
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if (!eng)
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return -1;
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vfree(eng->reqs[0].frames[0].data);
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for (r = 0; r < MAX_REQUEST_SIZE_PER_ENGINE; r++) {
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init_request(&eng->reqs[r]);
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for (f = 0; f < MAX_FRAMES_PER_REQUEST; f++)
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set_frame_data(&eng->reqs[r].frames[f], NULL);
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}
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local_irq_disable();
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write_seqlock(&eng->seqlock);
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eng->req_running = false;
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write_sequnlock(&eng->seqlock);
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local_irq_enable();
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return 0;
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}
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EXPORT_SYMBOL(unregister_requests);
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int set_engine_ops(struct engine_requests *eng, const struct engine_ops *ops)
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{
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if (!eng || !ops)
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return -1;
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eng->ops = ops;
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return 0;
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}
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EXPORT_SYMBOL(set_engine_ops);
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bool request_running(struct engine_requests *eng)
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{
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unsigned int seq;
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seqlock_t *lock;
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bool running;
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lock = &eng->seqlock;
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do {
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seq = read_seqbegin(lock);
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running = eng->req_running;
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} while (read_seqretry(lock, seq));
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LOG_DBG("[%s] engine running request(%d)\n", __func__, running);
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return running;
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}
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EXPORT_SYMBOL(request_running);
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/*TODO: called in ENQUE_REQ */
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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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{
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unsigned int r;
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unsigned int f;
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unsigned int enqnum = 0;
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if (!eng)
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return -1;
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r = eng->req_ctl.wcnt;
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/* FIFO when wcnt starts from 0 */
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f = eng->reqs[r].fctl.wcnt;
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if (eng->reqs[r].state != REQUEST_STATE_EMPTY) {
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LOG_ERR("No empty requests available.");
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goto ERROR;
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}
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if (!eng->ops->req_enque_cb || !req) {
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LOG_ERR("NULL req_enque_cb or req");
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goto ERROR;
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}
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if (eng->ops->req_enque_cb(eng->reqs[r].frames, req)) {
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LOG_ERR("Failed to enque request, check cb");
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goto ERROR;
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}
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LOG_DBG("request(%d) enqued with %d frames", r, fcnt);
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for (f = 0; f < fcnt; f++)
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eng->reqs[r].frames[f].state = FRAME_STATUS_ENQUE;
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eng->reqs[r].state = REQUEST_STATE_PENDING;
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eng->reqs[r].pid = pid;
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eng->reqs[r].fctl.wcnt = fcnt;
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eng->reqs[r].fctl.size = fcnt;
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eng->req_ctl.wcnt = (r + 1) % MAX_REQUEST_SIZE_PER_ENGINE;
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#if REQUEST_REGULATION
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/*
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* pending request count for request base regulation
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*/
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for (r = 0; r < MAX_REQUEST_SIZE_PER_ENGINE; r++)
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if (eng->reqs[r].state == REQUEST_STATE_PENDING)
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enqnum++;
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#else
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/*
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* running frame count for frame base regulation
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*/
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for (r = 0; r < MAX_REQUEST_SIZE_PER_ENGINE; r++)
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for (f = 0; f < MAX_FRAMES_PER_REQUEST; f++)
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if (eng->reqs[r].frames[f].state ==
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FRAME_STATUS_RUNNING)
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enqnum++;
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#endif
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return enqnum;
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ERROR:
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return -1;
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}
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EXPORT_SYMBOL(enque_request);
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/* ConfigWMFERequest / ConfigOCCRequest abstraction
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* TODO: locking should be here NOT camera_owe.c
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*/
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signed int request_handler(struct engine_requests *eng, spinlock_t *lock)
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{
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unsigned int f, fn;
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unsigned int r;
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enum REQUEST_STATE_ENUM rstate;
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enum FRAME_STATUS_ENUM fstate;
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unsigned long flags;
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signed int ret = -1;
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if (!eng)
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return -1;
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LOG_DBG("[%s]waits for completion(%d).\n", __func__,
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eng->req_handler_done.done);
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wait_for_completion(&eng->req_handler_done);
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reinit_completion(&eng->req_handler_done);
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LOG_DBG("[%s]previous request completed, reset(%d).\n", __func__,
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eng->req_handler_done.done);
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spin_lock_irqsave(lock, flags);
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/*
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* ioctl calls enque_request() request wcnt inc
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* if request_handler is NOT called after enque_request() in serial,
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* wcnt may inc many times maore than 1
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*/
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r = eng->req_ctl.gcnt;
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LOG_DBG("[%s] processing request(%d)\n", __func__, r);
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rstate = eng->reqs[r].state;
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#if REQUEST_REGULATION
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(void) fn;
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if (rstate != REQUEST_STATE_PENDING) {
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LOG_DBG("[%s]No pending request(%d), state:%d\n", __func__,
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r, rstate);
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write_seqlock(&eng->seqlock);
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eng->req_running = false;
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write_sequnlock(&eng->seqlock);
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spin_unlock_irqrestore(lock, flags);
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complete_all(&eng->req_handler_done);
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LOG_DBG("[%s]complete(%d)\n", __func__,
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eng->req_handler_done.done);
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return 0;
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}
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/* running request contains all running frames */
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eng->reqs[r].state = REQUEST_STATE_RUNNING;
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for (f = 0; f < MAX_FRAMES_PER_REQUEST; f++) {
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fstate = eng->reqs[r].frames[f].state;
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if (fstate == FRAME_STATUS_ENQUE) {
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LOG_DBG("[%s]Processing request(%d) of frame(%d)\n",
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__func__, r, f);
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spin_unlock_irqrestore(lock, flags);
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ret = eng->ops->frame_handler(&eng->reqs[r].frames[f]);
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spin_lock_irqsave(lock, flags);
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if (ret)
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LOG_WRN("[%s]failed:frame %d of request %d",
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__func__, f, r);
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eng->reqs[r].frames[f].state = FRAME_STATUS_RUNNING;
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}
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}
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eng->req_ctl.gcnt = (r + 1) % MAX_REQUEST_SIZE_PER_ENGINE;
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#else
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/*
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* TODO: to prevent IRQ timing issue due to multi-frame requests,
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* frame-based reguest handling should be used instead.
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*/
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if (eng->reqs[r].pending_run == false) {
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if (rstate != REQUEST_STATE_PENDING) {
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LOG_DBG("[%s]No pending request(%d), state:%d\n",
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__func__, r, rstate);
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write_seqlock(&eng->seqlock);
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eng->req_running = false;
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write_sequnlock(&eng->seqlock);
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spin_unlock_irqrestore(lock, flags);
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complete_all(&eng->req_handler_done);
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LOG_DBG("[%s]complete(%d)\n", __func__,
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eng->req_handler_done.done);
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return 0;
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}
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eng->reqs[r].pending_run = true;
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eng->reqs[r].state = REQUEST_STATE_RUNNING;
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} else
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if (rstate != REQUEST_STATE_RUNNING) {
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LOG_WRN(
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"[%s]No pending_run request(%d), state:%d\n", __func__,
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r, rstate);
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write_seqlock(&eng->seqlock);
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eng->req_running = false;
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write_sequnlock(&eng->seqlock);
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spin_unlock_irqrestore(lock, flags);
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complete_all(&eng->req_handler_done);
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LOG_DBG(
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"[%s]complete(%d)\n", __func__,
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eng->req_handler_done.done);
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return 0;
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}
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/* pending requets can have running frames */
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f = eng->reqs[r].fctl.gcnt;
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LOG_DBG("[%s]Iterating request(%d) of frame(%d)\n",
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__func__, r, f);
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fstate = eng->reqs[r].frames[f].state;
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if (fstate == FRAME_STATUS_ENQUE) {
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LOG_DBG("[%s]Processing request(%d) of frame(%d)\n",
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__func__, r, f);
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write_seqlock(&eng->seqlock);
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eng->req_running = true;
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write_sequnlock(&eng->seqlock);
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eng->reqs[r].frames[f].state = FRAME_STATUS_RUNNING;
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spin_unlock_irqrestore(lock, flags);
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ret = eng->ops->frame_handler(&eng->reqs[r].frames[f]);
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spin_lock_irqsave(lock, flags);
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if (ret)
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LOG_WRN("[%s]failed:frame %d of request %d",
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__func__, f, r);
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} else {
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spin_unlock_irqrestore(lock, flags);
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LOG_WRN("[%s]already running frame %d of request %d",
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__func__, f, r);
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complete_all(&eng->req_handler_done);
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LOG_DBG("[%s]complete(%d)\n", __func__,
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eng->req_handler_done.done);
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return 1;
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}
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fn = (f + 1) % MAX_FRAMES_PER_REQUEST;
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fstate = eng->reqs[r].frames[fn].state;
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if (fstate == FRAME_STATUS_EMPTY || fn == 0) {
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eng->reqs[r].pending_run = false;
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eng->req_ctl.gcnt = (r + 1) % MAX_REQUEST_SIZE_PER_ENGINE;
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} else
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eng->reqs[r].fctl.gcnt = fn;
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#endif
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spin_unlock_irqrestore(lock, flags);
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complete_all(&eng->req_handler_done);
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LOG_DBG("complete_all done = %d\n", eng->req_handler_done.done);
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return 1;
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}
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EXPORT_SYMBOL(request_handler);
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int update_request(struct engine_requests *eng, pid_t *pid)
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{
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unsigned int i, f, n;
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int req_jobs = -1;
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if (!eng)
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return -1;
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/* TODO: request ring */
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for (i = eng->req_ctl.icnt; i < MAX_REQUEST_SIZE_PER_ENGINE; i++) {
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/* find 1st running request */
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if (eng->reqs[i].state != REQUEST_STATE_RUNNING)
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continue;
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/* find 1st running frame, f. */
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for (f = 0; f < MAX_FRAMES_PER_REQUEST; f++) {
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if (eng->reqs[i].frames[f].state ==
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FRAME_STATUS_RUNNING)
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break;
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}
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/* TODO: no running frame in a running request */
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if (f == MAX_FRAMES_PER_REQUEST) {
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LOG_ERR(
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"[%s]No running frames in a running request(%d).",
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__func__, i);
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break;
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}
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eng->reqs[i].frames[f].state = FRAME_STATUS_FINISHED;
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LOG_INF("[%s]request %d of frame %d finished.\n",
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__func__, i, f);
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/*TODO: to obtain statistics */
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if (!eng->ops->req_feedback_cb) {
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LOG_DBG("NULL req_feedback_cb");
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goto NO_FEEDBACK;
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}
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if (eng->ops->req_feedback_cb(&eng->reqs[i].frames[f])) {
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LOG_ERR("Failed to feedback statistics, check cb");
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goto NO_FEEDBACK;
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}
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NO_FEEDBACK:
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n = f + 1;
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if ((n == MAX_FRAMES_PER_REQUEST) ||
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((n < MAX_FRAMES_PER_REQUEST) &&
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(eng->reqs[i].frames[n].state == FRAME_STATUS_EMPTY))) {
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req_jobs = 0;
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(*pid) = eng->reqs[i].pid;
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eng->reqs[i].state = REQUEST_STATE_FINISHED;
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eng->req_ctl.icnt = (eng->req_ctl.icnt + 1) %
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MAX_REQUEST_SIZE_PER_ENGINE;
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} else {
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LOG_INF(
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"[%s]more frames left of request(%d/%d).", __func__,
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i, eng->req_ctl.icnt);
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}
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break;
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}
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return req_jobs;
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}
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EXPORT_SYMBOL(update_request);
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/*TODO: called in DEQUE_REQ */
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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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{
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unsigned int r;
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unsigned int f;
|
|
|
|
if (!eng)
|
|
return -1;
|
|
|
|
r = eng->req_ctl.rcnt;
|
|
/* FIFO when rcnt starts from 0 */
|
|
f = eng->reqs[r].fctl.rcnt;
|
|
|
|
if (eng->reqs[r].state != REQUEST_STATE_FINISHED) {
|
|
LOG_ERR("[%s]Request(%d) NOT finished", __func__, r);
|
|
goto ERROR;
|
|
}
|
|
|
|
*fcnt = eng->reqs[r].fctl.size;
|
|
LOG_DBG("[%s]deque request(%d) has %d frames", __func__, r, *fcnt);
|
|
|
|
if (!eng->ops->req_deque_cb || !req) {
|
|
LOG_ERR("[%s]NULL req_deque_cb/req", __func__);
|
|
goto ERROR;
|
|
}
|
|
|
|
if (eng->ops->req_deque_cb(eng->reqs[r].frames, req)) {
|
|
LOG_ERR("[%s]Failed to deque, check req_deque_cb", __func__);
|
|
goto ERROR;
|
|
}
|
|
|
|
for (f = 0; f < *fcnt; f++)
|
|
eng->reqs[r].frames[f].state = FRAME_STATUS_EMPTY;
|
|
eng->reqs[r].state = REQUEST_STATE_EMPTY;
|
|
eng->reqs[r].pid = 0;
|
|
|
|
eng->reqs[r].fctl.wcnt = 0;
|
|
eng->reqs[r].fctl.rcnt = 0;
|
|
eng->reqs[r].fctl.icnt = 0;
|
|
eng->reqs[r].fctl.gcnt = 0;
|
|
eng->reqs[r].fctl.size = 0;
|
|
|
|
eng->req_ctl.rcnt = (r + 1) % MAX_REQUEST_SIZE_PER_ENGINE;
|
|
|
|
return 0;
|
|
ERROR:
|
|
return -1;
|
|
}
|
|
EXPORT_SYMBOL(deque_request);
|
|
|
|
signed int request_dump(struct engine_requests *eng)
|
|
{
|
|
unsigned int r;
|
|
unsigned int f;
|
|
|
|
LOG_ERR("[%s] +\n", __func__);
|
|
|
|
if (!eng) {
|
|
LOG_ERR("[%s]can't dump NULL engine", __func__);
|
|
return -1;
|
|
}
|
|
|
|
LOG_ERR("req_ctl:wc:%d, gc:%d, ic:%d, rc:%d, data:%p\n",
|
|
eng->req_ctl.wcnt,
|
|
eng->req_ctl.gcnt,
|
|
eng->req_ctl.icnt,
|
|
eng->req_ctl.rcnt,
|
|
eng->reqs[0].frames[0].data);
|
|
|
|
for (r = 0; r < MAX_REQUEST_SIZE_PER_ENGINE; r++) {
|
|
LOG_ERR(
|
|
"R[%d].sta:%d, pid:0x%08X, wc:%d, gc:%d, ic:%d, rc:%d\n",
|
|
r,
|
|
eng->reqs[r].state,
|
|
eng->reqs[r].pid,
|
|
eng->reqs[r].fctl.wcnt,
|
|
eng->reqs[r].fctl.gcnt,
|
|
eng->reqs[r].fctl.icnt,
|
|
eng->reqs[r].fctl.rcnt);
|
|
|
|
for (f = 0; f < MAX_FRAMES_PER_REQUEST; f += 2) {
|
|
LOG_ERR("F[%d].state:%d, F[%d].state:%d\n",
|
|
f, eng->reqs[r].frames[f].state,
|
|
f + 1, eng->reqs[r].frames[f + 1].state);
|
|
}
|
|
}
|
|
|
|
LOG_ERR("[%s] -\n", __func__);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(request_dump);
|
|
#ifndef TODO
|
|
static int __init egnreq_init(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
LOG_INF("engine_request module loaded");
|
|
return ret;
|
|
}
|
|
|
|
static void __exit egnreq_exit(void)
|
|
{
|
|
LOG_INF("engine_request module unloaded");
|
|
|
|
}
|
|
|
|
module_init(egnreq_init);
|
|
module_exit(egnreq_exit);
|
|
#endif
|