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Wed, 3 Apr 2024 15:07:33 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 3 Apr 2024 15:07:33 +0800 From: Shawn Sung To: Chun-Kuang Hu CC: Philipp Zabel , David Airlie , Daniel Vetter , Matthias Brugger , AngeloGioacchino Del Regno , "Maarten Lankhorst" , Maxime Ripard , Thomas Zimmermann , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , , , , , , , Jason-JH.Lin , Hsiao Chien Sung Subject: [PATCH v4 2/9] drm/mediatek: Add secure buffer control flow to mtk_drm_gem Date: Wed, 3 Apr 2024 15:07:25 +0800 Message-ID: <20240403070732.22085-3-shawn.sung@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240403070732.22085-1-shawn.sung@mediatek.com> References: <20240403070732.22085-1-shawn.sung@mediatek.com> MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--6.866000-8.000000 X-TMASE-MatchedRID: XAa2d/45j8QXSulpnju2HwNJ3EDwuUClKx5ICGp/WtFLgo8+IIHbcJh8 90SylZrlwPiYYkBDBMc9ab9SerZV2iUtdpGicV4RH5YQyOg71ZZCX8V1FiRRkt9RlPzeVuQQost SmZzTxtrZoTly3PGW4OyVvSGEffbDb6wZx1ul0pzJ5W6OZe5hhS7te75+XjKBv8D7QPW2jo8ARd T81SrHjvetcOpa0TfdcBOyDww4NUgfE8yM4pjsD7j1D7wMfbaSxEHRux+uk8h+ICquNi0WJBHOT tYy/TINSJhtH623y8Dcj7PZMEnlwBRhFweaMehmftwZ3X11IV0= X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--6.866000-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: FD86E8BD817DA32466FAA0471EB4BF2D837E27964864AA52689A82C46C7512152000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240403_080820_418010_27D28467 X-CRM114-Status: GOOD ( 15.81 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: "Jason-JH.Lin" Add secure buffer control flow to mtk_drm_gem. When user space takes DRM_MTK_GEM_CREATE_ENCRYPTED flag and size to create a mtk_drm_gem object, mtk_drm_gem will find a matched size dma buffer from secure dma-heap and bind it to mtk_drm_gem object. Signed-off-by: Jason-JH.Lin Signed-off-by: Hsiao Chien Sung --- drivers/gpu/drm/mediatek/mtk_gem.c | 85 +++++++++++++++++++++++++++++- drivers/gpu/drm/mediatek/mtk_gem.h | 4 ++ 2 files changed, 88 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_gem.c b/drivers/gpu/drm/mediatek/mtk_gem.c index e59e0727717b7..ec34d02c14377 100644 --- a/drivers/gpu/drm/mediatek/mtk_gem.c +++ b/drivers/gpu/drm/mediatek/mtk_gem.c @@ -4,6 +4,8 @@ */ #include +#include +#include #include #include @@ -102,6 +104,81 @@ struct mtk_gem_obj *mtk_gem_create(struct drm_device *dev, return ERR_PTR(ret); } +struct mtk_gem_obj *mtk_gem_create_from_heap(struct drm_device *dev, + const char *heap, size_t size) +{ + struct mtk_drm_private *priv = dev->dev_private; + struct mtk_gem_obj *mtk_gem; + struct drm_gem_object *obj; + struct dma_heap *dma_heap; + struct dma_buf *dma_buf; + struct dma_buf_attachment *attach; + struct sg_table *sgt; + struct iosys_map map = {}; + int ret; + + mtk_gem = mtk_gem_init(dev, size); + if (IS_ERR(mtk_gem)) + return ERR_CAST(mtk_gem); + + obj = &mtk_gem->base; + + dma_heap = dma_heap_find(heap); + if (!dma_heap) { + DRM_ERROR("heap find fail\n"); + goto err_gem_free; + } + dma_buf = dma_heap_buffer_alloc(dma_heap, size, + O_RDWR | O_CLOEXEC, DMA_HEAP_VALID_HEAP_FLAGS); + if (IS_ERR(dma_buf)) { + DRM_ERROR("buffer alloc fail\n"); + dma_heap_put(dma_heap); + goto err_gem_free; + } + dma_heap_put(dma_heap); + + attach = dma_buf_attach(dma_buf, priv->dma_dev); + if (IS_ERR(attach)) { + DRM_ERROR("attach fail, return\n"); + dma_buf_put(dma_buf); + goto err_gem_free; + } + + sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); + if (IS_ERR(sgt)) { + DRM_ERROR("map failed, detach and return\n"); + dma_buf_detach(dma_buf, attach); + dma_buf_put(dma_buf); + goto err_gem_free; + } + obj->import_attach = attach; + mtk_gem->dma_addr = sg_dma_address(sgt->sgl); + mtk_gem->sg = sgt; + mtk_gem->size = dma_buf->size; + + if (!strcmp(heap, "mtk_svp") || !strcmp(heap, "mtk_svp_cma")) { + /* secure buffer can not be mapped */ + mtk_gem->secure = true; + } else { + ret = dma_buf_vmap(dma_buf, &map); + mtk_gem->kvaddr = map.vaddr; + if (ret) { + DRM_ERROR("map failed, ret=%d\n", ret); + dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL); + dma_buf_detach(dma_buf, attach); + dma_buf_put(dma_buf); + mtk_gem->kvaddr = NULL; + } + } + + return mtk_gem; + +err_gem_free: + drm_gem_object_release(obj); + kfree(mtk_gem); + return ERR_PTR(-ENOMEM); +} + void mtk_gem_free_object(struct drm_gem_object *obj) { struct mtk_gem_obj *mtk_gem = to_mtk_gem_obj(obj); @@ -229,7 +306,9 @@ struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev, if (IS_ERR(mtk_gem)) return ERR_CAST(mtk_gem); + mtk_gem->secure = !sg_page(sg->sgl); mtk_gem->dma_addr = sg_dma_address(sg->sgl); + mtk_gem->size = attach->dmabuf->size; mtk_gem->sg = sg; return &mtk_gem->base; @@ -304,7 +383,11 @@ int mtk_gem_create_ioctl(struct drm_device *dev, void *data, struct drm_mtk_gem_create *args = data; int ret; - mtk_gem = mtk_gem_create(dev, args->size, false); + if (args->flags & DRM_MTK_GEM_CREATE_ENCRYPTED) + mtk_gem = mtk_gem_create_from_heap(dev, "mtk_svp_cma", args->size); + else + mtk_gem = mtk_gem_create(dev, args->size, false); + if (IS_ERR(mtk_gem)) return PTR_ERR(mtk_gem); diff --git a/drivers/gpu/drm/mediatek/mtk_gem.h b/drivers/gpu/drm/mediatek/mtk_gem.h index 4d7598220ca8f..e1d3537a55ecb 100644 --- a/drivers/gpu/drm/mediatek/mtk_gem.h +++ b/drivers/gpu/drm/mediatek/mtk_gem.h @@ -27,9 +27,11 @@ struct mtk_gem_obj { void *cookie; void *kvaddr; dma_addr_t dma_addr; + size_t size; unsigned long dma_attrs; struct sg_table *sg; struct page **pages; + bool secure; }; #define to_mtk_gem_obj(x) container_of(x, struct mtk_gem_obj, base) @@ -39,6 +41,8 @@ struct mtk_gem_obj *mtk_gem_create(struct drm_device *dev, size_t size, bool alloc_kmap); int mtk_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev, struct drm_mode_create_dumb *args); +struct mtk_gem_obj *mtk_gem_create_from_heap(struct drm_device *dev, + const char *heap, size_t size); struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj); struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sg);