drivers/media/platform/mtk-vcodec/mtk_vcodec_util.c

   1 /*
   2 * Copyright (c) 2016 MediaTek Inc.
   3 * Author: PC Chen <pc.chen@mediatek.com>
   4 *       Tiffany Lin <tiffany.lin@mediatek.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 */
  15
  16 #include <linux/module.h>
  17
  18 #include "mtk_vcodec_drv.h"
  19 #include "mtk_vcodec_util.h"
  20 #include "mtk_vpu.h"
  21
  22 /* For encoder, this will enable logs in venc/*/
  23 bool mtk_vcodec_dbg;
  24 EXPORT_SYMBOL(mtk_vcodec_dbg);
  25
  26 /* The log level of v4l2 encoder or decoder driver.
  27  * That is, files under mtk-vcodec/.
  28  */
  29 int mtk_v4l2_dbg_level;
  30 EXPORT_SYMBOL(mtk_v4l2_dbg_level);
  31
  32 void __iomem *mtk_vcodec_get_reg_addr(struct mtk_vcodec_ctx *data,
  33                                         unsigned int reg_idx)
  34 {
  35         struct mtk_vcodec_ctx *ctx = (struct mtk_vcodec_ctx *)data;
  36
  37         if (!data || reg_idx >= NUM_MAX_VCODEC_REG_BASE) {
  38                 mtk_v4l2_err("Invalid arguments, reg_idx=%d", reg_idx);
  39                 return NULL;
  40         }
  41         return ctx->dev->reg_base[reg_idx];
  42 }
  43 EXPORT_SYMBOL(mtk_vcodec_get_reg_addr);
  44
  45 int mtk_vcodec_mem_alloc(struct mtk_vcodec_ctx *data,
  46                         struct mtk_vcodec_mem *mem)
  47 {
  48         unsigned long size = mem->size;
  49         struct mtk_vcodec_ctx *ctx = (struct mtk_vcodec_ctx *)data;
  50         struct device *dev = &ctx->dev->plat_dev->dev;
  51
  52         mem->va = dma_alloc_coherent(dev, size, &mem->dma_addr, GFP_KERNEL);
  53
  54         if (!mem->va) {
  55                 mtk_v4l2_err("%s dma_alloc size=%ld failed!", dev_name(dev),
  56                              size);
  57                 return -ENOMEM;
  58         }
  59
  60         memset(mem->va, 0, size);
  61
  62         mtk_v4l2_debug(3, "[%d]  - va      = %p", ctx->id, mem->va);
  63         mtk_v4l2_debug(3, "[%d]  - dma     = 0x%lx", ctx->id,
  64                        (unsigned long)mem->dma_addr);
  65         mtk_v4l2_debug(3, "[%d]    size = 0x%lx", ctx->id, size);
  66
  67         return 0;
  68 }
  69 EXPORT_SYMBOL(mtk_vcodec_mem_alloc);
  70
  71 void mtk_vcodec_mem_free(struct mtk_vcodec_ctx *data,
  72                         struct mtk_vcodec_mem *mem)
  73 {
  74         unsigned long size = mem->size;
  75         struct mtk_vcodec_ctx *ctx = (struct mtk_vcodec_ctx *)data;
  76         struct device *dev = &ctx->dev->plat_dev->dev;
  77
  78         if (!mem->va) {
  79                 mtk_v4l2_err("%s dma_free size=%ld failed!", dev_name(dev),
  80                              size);
  81                 return;
  82         }
  83
  84         mtk_v4l2_debug(3, "[%d]  - va      = %p", ctx->id, mem->va);
  85         mtk_v4l2_debug(3, "[%d]  - dma     = 0x%lx", ctx->id,
  86                        (unsigned long)mem->dma_addr);
  87         mtk_v4l2_debug(3, "[%d]    size = 0x%lx", ctx->id, size);
  88
  89         dma_free_coherent(dev, size, mem->va, mem->dma_addr);
  90         mem->va = NULL;
  91         mem->dma_addr = 0;
  92         mem->size = 0;
  93 }
  94 EXPORT_SYMBOL(mtk_vcodec_mem_free);
  95
  96 void mtk_vcodec_set_curr_ctx(struct mtk_vcodec_dev *dev,
  97         struct mtk_vcodec_ctx *ctx)
  98 {
  99         unsigned long flags;
 100
 101         spin_lock_irqsave(&dev->irqlock, flags);
 102         dev->curr_ctx = ctx;
 103         spin_unlock_irqrestore(&dev->irqlock, flags);
 104 }
 105 EXPORT_SYMBOL(mtk_vcodec_set_curr_ctx);
 106
 107 struct mtk_vcodec_ctx *mtk_vcodec_get_curr_ctx(struct mtk_vcodec_dev *dev)
 108 {
 109         unsigned long flags;
 110         struct mtk_vcodec_ctx *ctx;
 111
 112         spin_lock_irqsave(&dev->irqlock, flags);
 113         ctx = dev->curr_ctx;
 114         spin_unlock_irqrestore(&dev->irqlock, flags);
 115         return ctx;
 116 }
 117 EXPORT_SYMBOL(mtk_vcodec_get_curr_ctx);
 118
 119 MODULE_LICENSE("GPL v2");
 120 MODULE_DESCRIPTION("Mediatek video codec driver");