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J . Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Matthias Brugger , , , , , , , Subject: [PATCH v4,12/22] media: mediatek: vcodec: add interface to allocate/free secure memory Date: Mon, 29 Jan 2024 14:30:15 +0800 Message-ID: <20240129063025.29251-13-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240129063025.29251-1-yunfei.dong@mediatek.com> References: <20240129063025.29251-1-yunfei.dong@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240128_223105_343239_279374B6 X-CRM114-Status: GOOD ( 17.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Need to call 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 | 122 +++++++++++++++++- .../mediatek/vcodec/common/mtk_vcodec_util.h | 3 + 3 files changed, 123 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/mediatek/vcodec/Kconfig b/drivers/media/platform/mediatek/vcodec/Kconfig index bc8292232530..707865703e61 100644 --- a/drivers/media/platform/mediatek/vcodec/Kconfig +++ b/drivers/media/platform/mediatek/vcodec/Kconfig @@ -17,6 +17,7 @@ config VIDEO_MEDIATEK_VCODEC depends on VIDEO_MEDIATEK_VPU || !VIDEO_MEDIATEK_VPU depends on MTK_SCP || !MTK_SCP depends on MTK_SMI || (COMPILE_TEST && MTK_SMI=n) + depends on DMABUF_HEAPS select VIDEOBUF2_DMA_CONTIG select V4L2_MEM2MEM_DEV select VIDEO_MEDIATEK_VCODEC_VPU if VIDEO_MEDIATEK_VPU 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 9ce34a3b5ee6..5cb7c347322b 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) +{ + struct device *dev = &ctx->dev->plat_dev->dev; + struct dma_buf *dma_buffer; + struct dma_heap *vdec_heap; + struct dma_buf_attachment *attach; + struct sg_table *sgt; + unsigned long size = mem->size; + int ret = 0; + + if (!size) + return -EINVAL; + + vdec_heap = dma_heap_find("restricted_mtk_cm"); + if (!vdec_heap) { + mtk_v4l2_vdec_err(ctx, "dma heap find failed!"); + return -EPERM; + } + + dma_buffer = dma_heap_buffer_alloc(vdec_heap, size, DMA_HEAP_VALID_FD_FLAGS, + DMA_HEAP_VALID_HEAP_FLAGS); + if (IS_ERR_OR_NULL(dma_buffer)) { + mtk_v4l2_vdec_err(ctx, "dma heap alloc size=0x%lx failed!", size); + return PTR_ERR(dma_buffer); + } + + attach = dma_buf_attach(dma_buffer, dev); + if (IS_ERR_OR_NULL(attach)) { + mtk_v4l2_vdec_err(ctx, "dma attach size=0x%lx failed!", size); + ret = PTR_ERR(attach); + goto err_attach; + } + + sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); + if (IS_ERR_OR_NULL(sgt)) { + mtk_v4l2_vdec_err(ctx, "dma map attach size=0x%lx failed!", size); + ret = PTR_ERR(sgt); + goto err_sgt; + } + + mem->va = dma_buffer; + mem->dma_addr = (dma_addr_t)sg_dma_address((sgt)->sgl); + + if (!mem->va || !mem->dma_addr) { + mtk_v4l2_vdec_err(ctx, "dma buffer size=0x%lx failed!", size); + ret = -EPERM; + goto err_addr; + } + + mem->attach = attach; + mem->sgt = sgt; + + return 0; +err_addr: + dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL); +err_sgt: + dma_buf_detach(dma_buffer, attach); +err_attach: + dma_buf_put(dma_buffer); + + return ret; +} + +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 +175,57 @@ 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 (mem->sgt) + dma_buf_unmap_attachment(mem->attach, mem->sgt, DMA_BIDIRECTIONAL); + dma_buf_detach((struct dma_buf *)mem->va, mem->attach); + dma_buf_put((struct dma_buf *)mem->va); + + mem->attach = NULL; + mem->sgt = NULL; + mem->va = NULL; + mem->dma_addr = 0; + mem->size = 0; +} + +int mtk_vcodec_mem_alloc(void *priv, struct mtk_vcodec_mem *mem) +{ + enum mtk_instance_type inst_type = *((unsigned int *)priv); + int ret; + + if (inst_type == MTK_INST_DECODER) { + struct mtk_vcodec_dec_ctx *dec_ctx = priv; + + if (dec_ctx->is_secure_playback) { + ret = mtk_vcodec_mem_alloc_sec(dec_ctx, mem); + goto alloc_end; + } + } + + ret = mtk_vcodec_mem_alloc_nor(priv, mem); +alloc_end: + + return ret; +} +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 +287,4 @@ 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..22078e757ed0 100644 --- a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.h +++ b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.h @@ -18,6 +18,9 @@ struct mtk_vcodec_mem { size_t size; void *va; dma_addr_t dma_addr; + + struct dma_buf_attachment *attach; + struct sg_table *sgt; }; struct mtk_vcodec_fb {