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J . Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Matthias Brugger , , , , , , Subject: [PATCH v7 12/28] media: mediatek: vcodec: add interface to allocate/free secure memory Date: Sat, 20 Jul 2024 15:15:50 +0800 Message-ID: <20240720071606.27930-13-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240720071606.27930-1-yunfei.dong@mediatek.com> References: <20240720071606.27930-1-yunfei.dong@mediatek.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N Calling dma heap interface to allocate/free secure memory when playing secure video. Signed-off-by: Yunfei Dong --- .../media/platform/mediatek/vcodec/Kconfig | 1 + .../mediatek/vcodec/common/mtk_vcodec_util.c | 117 +++++++++++++++++- .../mediatek/vcodec/common/mtk_vcodec_util.h | 8 +- 3 files changed, 122 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/mediatek/vcodec/Kconfig b/drivers/media/platform/mediatek/vcodec/Kconfig index ce63e1fa6118..f4c105b1d39b 100644 --- a/drivers/media/platform/mediatek/vcodec/Kconfig +++ b/drivers/media/platform/mediatek/vcodec/Kconfig @@ -37,6 +37,7 @@ config VIDEO_MEDIATEK_VCODEC config VIDEO_MEDIATEK_VCODEC_TEE bool "MediaTek Video Codec TEE driver" + depends on DMABUF_HEAPS depends on OPTEE depends on TEE select VIDEO_MEDIATEK_VCODEC diff --git a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.c b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.c index fc4e34c29192..a77832f8cf46 100644 --- a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.c +++ b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.c @@ -5,9 +5,11 @@ * Tiffany Lin */ +#include #include #include #include +#include #include "../decoder/mtk_vcodec_dec_drv.h" #include "../encoder/mtk_vcodec_enc_drv.h" @@ -45,7 +47,7 @@ int mtk_vcodec_write_vdecsys(struct mtk_vcodec_dec_ctx *ctx, unsigned int reg, } EXPORT_SYMBOL(mtk_vcodec_write_vdecsys); -int mtk_vcodec_mem_alloc(void *priv, struct mtk_vcodec_mem *mem) +static int mtk_vcodec_mem_alloc_nor(void *priv, struct mtk_vcodec_mem *mem) { enum mtk_instance_type inst_type = *((unsigned int *)priv); struct platform_device *plat_dev; @@ -76,9 +78,71 @@ int mtk_vcodec_mem_alloc(void *priv, struct mtk_vcodec_mem *mem) return 0; } -EXPORT_SYMBOL(mtk_vcodec_mem_alloc); -void mtk_vcodec_mem_free(void *priv, struct mtk_vcodec_mem *mem) +static int mtk_vcodec_mem_alloc_sec(struct mtk_vcodec_dec_ctx *ctx, struct mtk_vcodec_mem *mem) +{ +#if IS_ENABLED(CONFIG_DMABUF_HEAPS) + struct device *dev = &ctx->dev->plat_dev->dev; + struct dma_buf *dma_buffer; + struct dma_heap *dma_heap; + struct dma_buf_attachment *attach; + struct sg_table *sgt; + unsigned long size = mem->size; + + if (!size) + return -EINVAL; + + dma_heap = dma_heap_find("restricted_mtk_cma"); + if (!dma_heap) { + mtk_v4l2_vdec_err(ctx, "dma heap find failed!"); + goto err_alloc_mem; + } + + dma_buffer = dma_heap_buffer_alloc(dma_heap, size, DMA_HEAP_VALID_FD_FLAGS, + DMA_HEAP_VALID_HEAP_FLAGS); + if (IS_ERR(dma_buffer)) { + mtk_v4l2_vdec_err(ctx, "dma heap alloc size=0x%lx failed!", size); + dma_heap_put(dma_heap); + goto err_alloc_mem; + } + dma_heap_put(dma_heap); + + attach = dma_buf_attach(dma_buffer, dev); + if (IS_ERR(attach)) { + mtk_v4l2_vdec_err(ctx, "dma attach size=0x%lx failed!", size); + dma_buf_put(dma_buffer); + goto err_alloc_mem; + } + + sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); + if (IS_ERR(sgt)) { + mtk_v4l2_vdec_err(ctx, "dma map attach size=0x%lx failed!", size); + dma_buf_detach(dma_buffer, attach); + dma_buf_put(dma_buffer); + goto err_alloc_mem; + } + + mem->dma_addr = sg_dma_address(sgt->sgl); + mem->dma_buf = dma_buffer; + mem->attach = attach; + mem->sgt = sgt; + + return 0; + +err_alloc_mem: + mem->attach = NULL; + mem->dma_buf = NULL; + mem->sgt = NULL; + mem->dma_addr = 0; + mem->size = 0; + + return -ENOMEM; +#else + return -EOPNOTSUPP; +#endif +} + +static void mtk_vcodec_mem_free_nor(void *priv, struct mtk_vcodec_mem *mem) { enum mtk_instance_type inst_type = *((unsigned int *)priv); struct platform_device *plat_dev; @@ -111,6 +175,52 @@ void mtk_vcodec_mem_free(void *priv, struct mtk_vcodec_mem *mem) mem->dma_addr = 0; mem->size = 0; } + +static void mtk_vcodec_mem_free_sec(struct mtk_vcodec_mem *mem) +{ +#if IS_ENABLED(CONFIG_DMABUF_HEAPS) + dma_buf_unmap_attachment(mem->attach, mem->sgt, DMA_BIDIRECTIONAL); + dma_buf_detach(mem->dma_buf, mem->attach); + dma_buf_put(mem->dma_buf); + + mem->attach = NULL; + mem->dma_buf = NULL; + mem->sgt = NULL; + mem->dma_addr = 0; + mem->size = 0; +#endif +} + +int mtk_vcodec_mem_alloc(void *priv, struct mtk_vcodec_mem *mem) +{ + enum mtk_instance_type inst_type = *((unsigned int *)priv); + + if (inst_type == MTK_INST_DECODER) { + struct mtk_vcodec_dec_ctx *dec_ctx = priv; + + if (dec_ctx->is_secure_playback) + return mtk_vcodec_mem_alloc_sec(dec_ctx, mem); + } + + return mtk_vcodec_mem_alloc_nor(priv, mem); +} +EXPORT_SYMBOL(mtk_vcodec_mem_alloc); + +void mtk_vcodec_mem_free(void *priv, struct mtk_vcodec_mem *mem) +{ + enum mtk_instance_type inst_type = *((unsigned int *)priv); + + if (inst_type == MTK_INST_DECODER) { + struct mtk_vcodec_dec_ctx *dec_ctx = priv; + + if (dec_ctx->is_secure_playback) { + mtk_vcodec_mem_free_sec(mem); + return; + } + } + + mtk_vcodec_mem_free_nor(priv, mem); +} EXPORT_SYMBOL(mtk_vcodec_mem_free); void *mtk_vcodec_get_hw_dev(struct mtk_vcodec_dec_dev *dev, int hw_idx) @@ -172,3 +282,4 @@ EXPORT_SYMBOL(mtk_vcodec_get_curr_ctx); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Mediatek video codec driver"); +MODULE_IMPORT_NS(DMA_BUF); diff --git a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.h b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.h index 85f615cdd4d3..0a264e4f52bf 100644 --- a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.h +++ b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.h @@ -16,8 +16,14 @@ struct mtk_vcodec_mem { size_t size; - void *va; + union { + void *va; + struct dma_buf *dma_buf; + }; dma_addr_t dma_addr; + + struct dma_buf_attachment *attach; + struct sg_table *sgt; }; struct mtk_vcodec_fb {