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J . Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Matthias Brugger , , , , , , Subject: [PATCH v6,01/24] v4l2: add restricted memory flags Date: Thu, 16 May 2024 20:20:39 +0800 Message-ID: <20240516122102.16379-2-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240516122102.16379-1-yunfei.dong@mediatek.com> References: <20240516122102.16379-1-yunfei.dong@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--4.149800-8.000000 X-TMASE-MatchedRID: 5AYjULL74rYxaBEU4bKrV4SvKOGqLLPKK2i9pofGVStcU0dNErOD+mlF 7OhYLlctcYKRVYWgduVAw/iJrysrSm+IsUfG75P2joyKzEmtrEeQoBr+SFneJJj9R7obtcgyH5L 2GhBQtff4ei4a6fEfjpynPbWEKM6u8xjBEybW2by3HA8h5a0MOXnL427v8Q461gisw2JKo8lzN8 /snsNYn/j1N4/6HNKlsGRzEHTW2nEfE8yM4pjsDwtuKBGekqUpOlxBO2IcOBaDB3ZqEXAYAIp/8 8s6zH6CLMa1wLyvYEOVsCHg6a9VM9hNU8cP4jYh/G47AcAybTmwM6AJeCWlbm72iaFWNy7GB1UY UHkmE/jiw6uxviJP8r9tsSiUciBlQ5zsaM5qada/lr1yYih0SylGctXaTCsu X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--4.149800-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 00C8DA871F738AAD29C7BF1F0BB062BED72FEA1C5C526C39E9A7696C95C2C6492000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240516_052121_716666_E9C9E2F2 X-CRM114-Status: GOOD ( 14.77 ) 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 From: Jeffrey Kardatzke Adds a V4L2 flag which indicates that a queue is using restricted dmabufs and the corresponding capability flag. Signed-off-by: Jeffrey Kardatzke Signed-off-by: Yunfei Dong --- include/media/videobuf2-core.h | 8 +++++++- include/uapi/linux/videodev2.h | 2 ++ 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 955237ac503d..afd497e93a37 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -517,6 +517,9 @@ struct vb2_buf_ops { * ->finish(). * @non_coherent_mem: when set queue will attempt to allocate buffers using * non-coherent memory. + * @allow_restricted_mem: when set user-space can pass the %V4L2_MEMORY_FLAG_RESTRICTED + * flag to indicate the dma bufs are restricted. + * @restricted_mem: when set queue will verify that the dma bufs are restricted. * @lock: pointer to a mutex that protects the &struct vb2_queue. The * driver can set this to a mutex to let the v4l2 core serialize * the queuing ioctls. If the driver wants to handle locking @@ -621,6 +624,8 @@ struct vb2_queue { unsigned int uses_requests:1; unsigned int allow_cache_hints:1; unsigned int non_coherent_mem:1; + unsigned int allow_restricted_mem:1; + unsigned int restricted_mem:1; struct mutex *lock; void *owner; @@ -792,7 +797,8 @@ void vb2_core_querybuf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb); * @q: pointer to &struct vb2_queue with videobuf2 queue. * @memory: memory type, as defined by &enum vb2_memory. * @flags: auxiliary queue/buffer management flags. Currently, the only - * used flag is %V4L2_MEMORY_FLAG_NON_COHERENT. + * used flags are %V4L2_MEMORY_FLAG_NON_COHERENT and + * %V4L2_MEMORY_FLAG_RESTRICTED. * @count: requested buffer count. * * Videobuf2 core helper to implement VIDIOC_REQBUF() operation. It is called diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index fe6b67e83751..89eb1a3c6555 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -1043,6 +1043,7 @@ struct v4l2_requestbuffers { }; #define V4L2_MEMORY_FLAG_NON_COHERENT (1 << 0) +#define V4L2_MEMORY_FLAG_RESTRICTED (1 << 1) /* capabilities for struct v4l2_requestbuffers and v4l2_create_buffers */ #define V4L2_BUF_CAP_SUPPORTS_MMAP (1 << 0) @@ -1054,6 +1055,7 @@ struct v4l2_requestbuffers { #define V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS (1 << 6) #define V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS (1 << 7) #define V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS (1 << 8) +#define V4L2_BUF_CAP_SUPPORTS_RESTRICTED_MEM (1 << 9) /** * struct v4l2_plane - plane info for multi-planar buffers