From patchwork Wed Feb 21 15:54:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 774743 Received: from madrid.collaboradmins.com (madrid.collaboradmins.com [46.235.227.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B8FFC81AB0; Wed, 21 Feb 2024 15:54:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=46.235.227.194 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708530888; cv=none; b=P2jpz+bdV7ECERtbNTBb7VkV8nywmdJ5zJL2vGgBM99SSSTV+o4FU953OfWAgJbbawbvTi8/Pu6PAUSBDp8UjZpNXrXIoFw7yD0CnTRsRarUfAcxC7K3Po/dQO1DcZIP1CXZE3qFgpoxZl/f7NQaZMW3engb3abbpx0Suvm2YIM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708530888; c=relaxed/simple; bh=F2tCb9wrVF4rzaA8ZIQQ0yFu1+5C0qlZBUoz027HFsA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=XVkUHMakiF5UUyAyDu0JYHzLya7QI31gw+rkaaJs8Z6KIlcknr4lw83pfLkhxhkvzCp9OyTortwJsd8KgNOrj4qFZUwnKD3jE1jCZQ8YMFYzQ8iWjoDYxD0qwgri7uBp0zdS8rICoaQRUtqstCeIfBZN5Ysq05coLXAHiObe3qw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=woM5TAZi; arc=none smtp.client-ip=46.235.227.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="woM5TAZi" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1708530885; bh=F2tCb9wrVF4rzaA8ZIQQ0yFu1+5C0qlZBUoz027HFsA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=woM5TAZi6ecMXV2UrX4WpflalEahTxiNez6SvyhDY2GxeXAp/tRthaAQqC/pudag6 3vQQ8hT6ZviTcUzUFVjSPwAl1oquO35QfjRcYe5DS3BeArFzg9hBl8NESYFj2jVyo/ laIsOpLpPNvqBIj4alVMlcZkfrmLj4YurC+uwarGOjcP+pMxQXWYJw7g167F9fv8gX 6I0ugIoDjyYcWWoa9jMQv5VThjI4LAp0z6SsHmQGegBDA3w0/Vo9O+bl39A2r0H3pN 6BVzV9putUB2INxrkRyY3cz5kW8/PynkbLF9A3WEL+c62zZNY0fNAb7/UTxYyF8m+T c8sFnnBrV6fmQ== Received: from benjamin-XPS-13-9310.. (cola.collaboradmins.com [195.201.22.229]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: benjamin.gaignard) by madrid.collaboradmins.com (Postfix) with ESMTPSA id 95B7B37820CE; Wed, 21 Feb 2024 15:54:44 +0000 (UTC) From: Benjamin Gaignard To: mchehab@kernel.org, tfiga@chromium.org, m.szyprowski@samsung.com, ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de, hverkuil-cisco@xs4all.nl, nicolas@ndufresne.ca Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v20 4/9] media: core: Rework how create_buf index returned value is computed Date: Wed, 21 Feb 2024 16:54:30 +0100 Message-Id: <20240221155435.100093-5-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240221155435.100093-1-benjamin.gaignard@collabora.com> References: <20240221155435.100093-1-benjamin.gaignard@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 When REMOVE_BUFS will be introduced holes could created in bufs array. To be able to reuse these unused indices reworking how create->index is set is mandatory. Let __vb2_queue_alloc() decide which first index is correct and forward this to the caller. Signed-off-by: Benjamin Gaignard --- .../media/common/videobuf2/videobuf2-core.c | 18 +++++++++++++----- .../media/common/videobuf2/videobuf2-v4l2.c | 14 +++++++++----- include/media/videobuf2-core.h | 5 ++++- 3 files changed, 26 insertions(+), 11 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 58c495b253ce..8e819d198c34 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -442,12 +442,15 @@ static void vb2_queue_remove_buffer(struct vb2_buffer *vb) * __vb2_queue_alloc() - allocate vb2 buffer structures and (for MMAP type) * video buffer memory for all buffers/planes on the queue and initializes the * queue + * @first_index: index of the first created buffer, all newly allocated buffers + * have indices in the range [first_index..first_index+count-1] * * Returns the number of buffers successfully allocated. */ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, unsigned int num_buffers, unsigned int num_planes, - const unsigned plane_sizes[VB2_MAX_PLANES]) + const unsigned int plane_sizes[VB2_MAX_PLANES], + unsigned int *first_index) { unsigned int q_num_buffers = vb2_get_num_buffers(q); unsigned int buffer, plane; @@ -461,6 +464,8 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, num_buffers = min_t(unsigned int, num_buffers, q->max_num_buffers - q_num_buffers); + *first_index = q_num_buffers; + for (buffer = 0; buffer < num_buffers; ++buffer) { /* Allocate vb2 buffer structures */ vb = kzalloc(q->buf_struct_size, GFP_KERNEL); @@ -820,7 +825,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, unsigned int q_num_bufs = vb2_get_num_buffers(q); unsigned plane_sizes[VB2_MAX_PLANES] = { }; bool non_coherent_mem = flags & V4L2_MEMORY_FLAG_NON_COHERENT; - unsigned int i; + unsigned int i, first_index; int ret = 0; if (q->streaming) { @@ -907,8 +912,10 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, /* Finally, allocate buffers and video memory */ allocated_buffers = - __vb2_queue_alloc(q, memory, num_buffers, num_planes, plane_sizes); + __vb2_queue_alloc(q, memory, num_buffers, num_planes, plane_sizes, &first_index); if (allocated_buffers == 0) { + /* There shouldn't be any buffers allocated, so first_index == 0 */ + WARN_ON(first_index); dprintk(q, 1, "memory allocation failed\n"); ret = -ENOMEM; goto error; @@ -982,7 +989,8 @@ EXPORT_SYMBOL_GPL(vb2_core_reqbufs); int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, unsigned int flags, unsigned int *count, unsigned int requested_planes, - const unsigned int requested_sizes[]) + const unsigned int requested_sizes[], + unsigned int *first_index) { unsigned int num_planes = 0, num_buffers, allocated_buffers; unsigned plane_sizes[VB2_MAX_PLANES] = { }; @@ -1044,7 +1052,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, /* Finally, allocate buffers and video memory */ allocated_buffers = __vb2_queue_alloc(q, memory, num_buffers, - num_planes, plane_sizes); + num_planes, plane_sizes, first_index); if (allocated_buffers == 0) { dprintk(q, 1, "memory allocation failed\n"); ret = -ENOMEM; diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index c575198e8354..03e8080a68a8 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -795,11 +795,15 @@ int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create) for (i = 0; i < requested_planes; i++) if (requested_sizes[i] == 0) return -EINVAL; - return ret ? ret : vb2_core_create_bufs(q, create->memory, - create->flags, - &create->count, - requested_planes, - requested_sizes); + if (ret) + return ret; + + return vb2_core_create_bufs(q, create->memory, + create->flags, + &create->count, + requested_planes, + requested_sizes, + &create->index); } EXPORT_SYMBOL_GPL(vb2_create_bufs); diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 2ca120f18edf..ee0cbd8705ec 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -823,6 +823,8 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, * @count: requested buffer count. * @requested_planes: number of planes requested. * @requested_sizes: array with the size of the planes. + * @first_index: index of the first created buffer, all allocated buffers have + * indices in the range [first_index..first_index+count-1] * * Videobuf2 core helper to implement VIDIOC_CREATE_BUFS() operation. It is * called internally by VB2 by an API-specific handler, like @@ -839,7 +841,8 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, unsigned int flags, unsigned int *count, unsigned int requested_planes, - const unsigned int requested_sizes[]); + const unsigned int requested_sizes[], + unsigned int *first_index); /** * vb2_core_prepare_buf() - Pass ownership of a buffer from userspace