cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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s5p_mfc_intr.c (2332B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * drivers/media/platform/samsung/mfc5/s5p_mfc_intr.c
      4 *
      5 * C file for Samsung MFC (Multi Function Codec - FIMV) driver
      6 * This file contains functions used to wait for command completion.
      7 *
      8 * Kamil Debski, Copyright (C) 2011 Samsung Electronics Co., Ltd.
      9 * http://www.samsung.com/
     10 */
     11
     12#include <linux/delay.h>
     13#include <linux/errno.h>
     14#include <linux/io.h>
     15#include <linux/sched.h>
     16#include <linux/wait.h>
     17#include "s5p_mfc_common.h"
     18#include "s5p_mfc_debug.h"
     19#include "s5p_mfc_intr.h"
     20
     21int s5p_mfc_wait_for_done_dev(struct s5p_mfc_dev *dev, int command)
     22{
     23	int ret;
     24
     25	ret = wait_event_interruptible_timeout(dev->queue,
     26		(dev->int_cond && (dev->int_type == command
     27		|| dev->int_type == S5P_MFC_R2H_CMD_ERR_RET)),
     28		msecs_to_jiffies(MFC_INT_TIMEOUT));
     29	if (ret == 0) {
     30		mfc_err("Interrupt (dev->int_type:%d, command:%d) timed out\n",
     31							dev->int_type, command);
     32		return 1;
     33	} else if (ret == -ERESTARTSYS) {
     34		mfc_err("Interrupted by a signal\n");
     35		return 1;
     36	}
     37	mfc_debug(1, "Finished waiting (dev->int_type:%d, command: %d)\n",
     38							dev->int_type, command);
     39	if (dev->int_type == S5P_MFC_R2H_CMD_ERR_RET)
     40		return 1;
     41	return 0;
     42}
     43
     44void s5p_mfc_clean_dev_int_flags(struct s5p_mfc_dev *dev)
     45{
     46	dev->int_cond = 0;
     47	dev->int_type = 0;
     48	dev->int_err = 0;
     49}
     50
     51int s5p_mfc_wait_for_done_ctx(struct s5p_mfc_ctx *ctx,
     52				    int command, int interrupt)
     53{
     54	int ret;
     55
     56	if (interrupt) {
     57		ret = wait_event_interruptible_timeout(ctx->queue,
     58				(ctx->int_cond && (ctx->int_type == command
     59			|| ctx->int_type == S5P_MFC_R2H_CMD_ERR_RET)),
     60					msecs_to_jiffies(MFC_INT_TIMEOUT));
     61	} else {
     62		ret = wait_event_timeout(ctx->queue,
     63				(ctx->int_cond && (ctx->int_type == command
     64			|| ctx->int_type == S5P_MFC_R2H_CMD_ERR_RET)),
     65					msecs_to_jiffies(MFC_INT_TIMEOUT));
     66	}
     67	if (ret == 0) {
     68		mfc_err("Interrupt (ctx->int_type:%d, command:%d) timed out\n",
     69							ctx->int_type, command);
     70		return 1;
     71	} else if (ret == -ERESTARTSYS) {
     72		mfc_err("Interrupted by a signal\n");
     73		return 1;
     74	}
     75	mfc_debug(1, "Finished waiting (ctx->int_type:%d, command: %d)\n",
     76							ctx->int_type, command);
     77	if (ctx->int_type == S5P_MFC_R2H_CMD_ERR_RET)
     78		return 1;
     79	return 0;
     80}
     81
     82void s5p_mfc_clean_ctx_int_flags(struct s5p_mfc_ctx *ctx)
     83{
     84	ctx->int_cond = 0;
     85	ctx->int_type = 0;
     86	ctx->int_err = 0;
     87}
     88