From patchwork Tue Feb 6 08:02:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 13546834 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 7921012AAD6; Tue, 6 Feb 2024 08:02:33 +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=1707206555; cv=none; b=AGMdyfJCk8D31dA33GgfINspoep19tC8daGnIbWcBVaMRmAn1HYfO7t0THr22htnrPCb3XydLWN+5bCR+REHBQjGEKc6ZqtTlVakIkQ7Q4oGhP2DsEsQmKWBgHDY6jpYP21dHphc0B+OpfWEmgxofQHTHdh57ZSj+3dtbFcx0Yk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707206555; c=relaxed/simple; bh=AQHxJDxHKybI6Oypj2MDAORaS7KhOD0Zjids4metyrc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=jwJoDOmgSNX7KbR8cYH76oe+doEb5+cSFMAJBJUUQW1IuCEmFiCcPNLM8GlpVMnY2knlu1c4GmPumDpK/ZV6UwL565TGsMzTMxdUdDgiY5epsbJuqL9QJ+9UjfP91fI4SH3wvn9/GlWSkGDzA89r0sRAZ4whTED83mCOWFMpSMU= 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=H7dsqrDZ; 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="H7dsqrDZ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1707206546; bh=AQHxJDxHKybI6Oypj2MDAORaS7KhOD0Zjids4metyrc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H7dsqrDZ1+rK1UjFTCAMma+ggxJXdZesfw16ZQXhOzppQYKm8oZFePOfei2maOt8T r9pqrAxpxQj8drKeXNVVmhU4Xo9kD1ZOBE6ZgxHzZTDj54p7voUBchOn2gRy1LtXxO KQ/eJRtcfVICoOPmEDZvQW/9fWadbTLBZHpKQPeljJyJXQZ/+06SLDhMWKcJ20+ap3 /i7qYaAAKlAY9PPM+HQud5aeFLK47qFVSHy5s7BV0Sti42/D4t6LN0JueUiZRsz27e fFr/Q77iuEHLiCHk6/JGXTHz9eTj6etdlbUnA1J+prXlQe2hkysBDAwQ1HdaRpVWxO GqXoBNLEyqyGA== 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 A796D3780C21; Tue, 6 Feb 2024 08:02:25 +0000 (UTC) From: Benjamin Gaignard To: hverkuil@xs4all.nl, mchehab@kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v19 1/9] media: videobuf2: Update vb2_is_busy() logic Date: Tue, 6 Feb 2024 09:02:11 +0100 Message-Id: <20240206080219.11951-2-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240206080219.11951-1-benjamin.gaignard@collabora.com> References: <20240206080219.11951-1-benjamin.gaignard@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Do not rely on the number of allocated buffers to know if the queue is busy but on a flag set when at least buffer has been allocated by REQBUFS or CREATE_BUFS ioctl. The flag is reset when REQBUFS is called with count = 0 or the file handle is closed. This is needed because delete buffers feature will be able to remove all the buffers from a queue while streaming so relying on the number of allocated buffers in the queue won't be possible. Signed-off-by: Benjamin Gaignard --- version 19: - Add q->is_busy = 0 in vb2_core_queue_release() - Fix q->is_busy usage in vb2_core_reqbufs() - Reword commit message. drivers/media/common/videobuf2/videobuf2-core.c | 4 ++++ include/media/videobuf2-core.h | 4 +++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index b6bf8f232f48..d8b3c04cb3b5 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -854,6 +854,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, __vb2_queue_free(q, q_num_bufs); mutex_unlock(&q->mmap_lock); + q->is_busy = 0; /* * In case of REQBUFS(0) return immediately without calling * driver's queue_setup() callback and allocating resources. @@ -966,6 +967,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, */ *count = allocated_buffers; q->waiting_for_buffers = !q->is_output; + q->is_busy = 1; return 0; @@ -1091,6 +1093,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, * to the userspace. */ *count = allocated_buffers; + q->is_busy = 1; return 0; @@ -2555,6 +2558,7 @@ void vb2_core_queue_release(struct vb2_queue *q) __vb2_queue_free(q, vb2_get_num_buffers(q)); kfree(q->bufs); q->bufs = NULL; + q->is_busy = 0; mutex_unlock(&q->mmap_lock); } EXPORT_SYMBOL_GPL(vb2_core_queue_release); diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 56719a26a46c..b317286a7b08 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -579,6 +579,7 @@ struct vb2_buf_ops { * called since poll() needs to return %EPOLLERR in that situation. * @is_multiplanar: set if buffer type is multiplanar * @is_output: set if buffer type is output + * @is_busy: set if at least one buffer has been allocated at some time. * @copy_timestamp: set if vb2-core should set timestamps * @last_buffer_dequeued: used in poll() and DQBUF to immediately return if the * last decoded buffer was already dequeued. Set for capture queues @@ -644,6 +645,7 @@ struct vb2_queue { unsigned int waiting_in_dqbuf:1; unsigned int is_multiplanar:1; unsigned int is_output:1; + unsigned int is_busy:1; unsigned int copy_timestamp:1; unsigned int last_buffer_dequeued:1; @@ -1163,7 +1165,7 @@ static inline unsigned int vb2_get_num_buffers(struct vb2_queue *q) */ static inline bool vb2_is_busy(struct vb2_queue *q) { - return vb2_get_num_buffers(q) > 0; + return !!q->is_busy; } /** From patchwork Tue Feb 6 08:02:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 13546837 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 57C0012AAD8; Tue, 6 Feb 2024 08:02:34 +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=1707206556; cv=none; b=HbTkgxcpCpXjNQXV2v9fuP+stIT3TQFXoSwPe3Aq47dtqLZMNgmnPvYQ9FvFNOWZwsaVpUFvLr2EXi7qdnVvupOGG4s0vff0pRuSGXIa+gxsNje+GFGhkY8Qg9KrtzkXQPQZqgT8n0JRScfjf1b2np27rSRqBpJmrO/UfAeBQho= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707206556; c=relaxed/simple; bh=QYDpAlGq9YsqF3WDMJ7UmmQwxC4xGnj+UUm3x0lfpSQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=SpgzuM+fr40zpKkPaBOS9Hg7IKPofWPIWv/jovdVdQ0qRafzWysY5jMHZFmxt9nwk0j52EUjQdpjzDcuZ/K/1U9F0Foddj6cRJ6cd2n0MWkohBf+sRSPBWqfFV6azKFX2ZWB47/ke0zT1kyAswUgo/+J1ehjnWm5eYspPK0AZSA= 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=rUaBzNaj; 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="rUaBzNaj" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1707206546; bh=QYDpAlGq9YsqF3WDMJ7UmmQwxC4xGnj+UUm3x0lfpSQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rUaBzNajRYTJFDx21FaJSfXmsRp7bSfeMMG2WVxoMXrFbdv7+jk72F1j15NfdYJOY r04CtYXnXrj+aF4BxPdoTU+Llxz8j+eFPydwbEflCEGLTT7HeALN8tmRn7S3Z06rL1 sP7HaQaOQpFWFs6aNuA/JWqKCEbnBP+BjNZgjH2TO3Itb3ZbYP5WPMIOU1mBQU5J2f id3PLOIOhtb2tnCUs4snz5HI6zuco33lDd5jTGF1h90CuHa7Z1NrdfiVirNGWcWC3g JM1FT6CxIb/kKqRt+tvszKTZupan6N+bdW6qWI9R0XA+NV2NQEhX/bL0InBkvmRL5m zfx8DUMvZNUUg== 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 40AAB378206B; Tue, 6 Feb 2024 08:02:26 +0000 (UTC) From: Benjamin Gaignard To: hverkuil@xs4all.nl, mchehab@kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v19 2/9] videobuf2: Add min_reqbufs_allocation field to vb2_queue structure Date: Tue, 6 Feb 2024 09:02:12 +0100 Message-Id: <20240206080219.11951-3-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240206080219.11951-1-benjamin.gaignard@collabora.com> References: <20240206080219.11951-1-benjamin.gaignard@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add 'min_reqbufs_allocation' field in the vb2_queue structure so drivers can specify the minimum number of buffers to allocate when calling VIDIOC_REQBUFS. When initializing the queue, v4l2 core makes sure that the following constraints are respected: - the minimum number of buffers to allocate must be at least 2 because one buffer is used by the hardware while the other is being processed by userspace. -if the driver needs 'min_queued_buffers' in the queue before calling start_streaming(), then the minimum requirement is 'min_queued_buffers + 1' to keep at least one buffer available for userspace. Simplify __vb2_init_fileio() by using 'min_reqbufs_allocation' directly to avoid duplicating the minimum number of buffers to allocate computation. Signed-off-by: Benjamin Gaignard --- .../media/common/videobuf2/videobuf2-core.c | 38 +++++++++++-------- include/media/videobuf2-core.h | 15 +++++++- 2 files changed, 37 insertions(+), 16 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index d8b3c04cb3b5..58c495b253ce 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -866,7 +866,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, /* * Make sure the requested values and current defaults are sane. */ - num_buffers = max_t(unsigned int, *count, q->min_queued_buffers); + num_buffers = max_t(unsigned int, *count, q->min_reqbufs_allocation); num_buffers = min_t(unsigned int, num_buffers, q->max_num_buffers); memset(q->alloc_devs, 0, sizeof(q->alloc_devs)); /* @@ -918,7 +918,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, * There is no point in continuing if we can't allocate the minimum * number of buffers needed by this vb2_queue. */ - if (allocated_buffers < q->min_queued_buffers) + if (allocated_buffers < q->min_reqbufs_allocation) ret = -ENOMEM; /* @@ -2524,6 +2524,25 @@ int vb2_core_queue_init(struct vb2_queue *q) if (WARN_ON(q->supports_requests && q->min_queued_buffers)) return -EINVAL; + /* + * The minimum requirement is 2: one buffer is used + * by the hardware while the other is being processed by userspace. + */ + if (q->min_reqbufs_allocation < 2) + q->min_reqbufs_allocation = 2; + + /* + * If the driver needs 'min_queued_buffers' in the queue before + * calling start_streaming() then the minimum requirement is + * 'min_queued_buffers + 1' to keep at least one buffer available + * for userspace. + */ + if (q->min_reqbufs_allocation < q->min_queued_buffers + 1) + q->min_reqbufs_allocation = q->min_queued_buffers + 1; + + if (WARN_ON(q->min_reqbufs_allocation > q->max_num_buffers)) + return -EINVAL; + INIT_LIST_HEAD(&q->queued_list); INIT_LIST_HEAD(&q->done_list); spin_lock_init(&q->done_lock); @@ -2717,7 +2736,6 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) struct vb2_fileio_data *fileio; struct vb2_buffer *vb; int i, ret; - unsigned int count = 0; /* * Sanity check @@ -2738,18 +2756,8 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) if (q->streaming || vb2_get_num_buffers(q) > 0) return -EBUSY; - /* - * Start with q->min_queued_buffers + 1, driver can increase it in - * queue_setup() - * - * 'min_queued_buffers' buffers need to be queued up before you - * can start streaming, plus 1 for userspace (or in this case, - * kernelspace) processing. - */ - count = max(2, q->min_queued_buffers + 1); - dprintk(q, 3, "setting up file io: mode %s, count %d, read_once %d, write_immediately %d\n", - (read) ? "read" : "write", count, q->fileio_read_once, + (read) ? "read" : "write", q->min_reqbufs_allocation, q->fileio_read_once, q->fileio_write_immediately); fileio = kzalloc(sizeof(*fileio), GFP_KERNEL); @@ -2763,7 +2771,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) * Request buffers and use MMAP type to force driver * to allocate buffers by itself. */ - fileio->count = count; + fileio->count = q->min_reqbufs_allocation; fileio->memory = VB2_MEMORY_MMAP; fileio->type = q->type; q->fileio = fileio; diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index b317286a7b08..ef5500d14c09 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -550,9 +550,21 @@ struct vb2_buf_ops { * @start_streaming can be called. Used when a DMA engine * cannot be started unless at least this number of buffers * have been queued into the driver. - * VIDIOC_REQBUFS will ensure at least @min_queued_buffers + * VIDIOC_REQBUFS will ensure at least @min_queued_buffers + 1 * buffers will be allocated. Note that VIDIOC_CREATE_BUFS will not * modify the requested buffer count. + * @min_reqbufs_allocation: the minimum number of buffers to be allocated when + * calling VIDIOC_REQBUFS. Note that VIDIOC_CREATE_BUFS will *not* + * modify the requested buffer count and does not use this field. + * Drivers can set this if there has to be a certain number of + * buffers available for the hardware to work effectively. + * This allows calling VIDIOC_REQBUFS with a buffer count of 1 and + * it will be automatically adjusted to a workable buffer count. + * If set, then @min_reqbufs_allocation must be larger than + * @min_queued_buffers + 1. + * If this field is > 3, then it is highly recommended that the + * driver implements the V4L2_CID_MIN_BUFFERS_FOR_CAPTURE/OUTPUT + * control. */ /* * Private elements (won't appear at the uAPI book): @@ -619,6 +631,7 @@ struct vb2_queue { u32 timestamp_flags; gfp_t gfp_flags; u32 min_queued_buffers; + u32 min_reqbufs_allocation; struct device *alloc_devs[VB2_MAX_PLANES]; From patchwork Tue Feb 6 08:02:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 13546836 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 57BBD12A159; Tue, 6 Feb 2024 08:02:34 +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=1707206555; cv=none; b=rYBpegD4Rw/8mNcUGxzESjzNuXniQ5pro7qfLTIlZ+s/P6GFUBxRz+eoCTuorKVaCI2BP7xqxNZW3w03dT3tvKfNuXRte4wI/efyPWWXZKgT4Ph6VOEuUD6uuqt5Ns7VGNqa18xUKEgC2JUpbbvR0kAlRV+n90JgbRh9S/WYNq8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707206555; c=relaxed/simple; bh=qivh6TydDKfcZbVPYc7spMw2cRqVCzEb9YVNhr43HUY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ZK2xGS+2hH+DVG0YNt1rdpyB36gjrOkc94tiOaGnZim7od/2VKDZpgF3KTPmHb2iMNMhO/3kSR6kqCEcWgtgeBmODuNDtLXnbL9dKfbeIi4NyAARGvGNRF7e77c193MK7I9XDFNjU6fxfe7YLPTTujJnd5I/46hTC9mLlShYwtg= 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=HSJ+Ip0w; 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="HSJ+Ip0w" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1707206547; bh=qivh6TydDKfcZbVPYc7spMw2cRqVCzEb9YVNhr43HUY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HSJ+Ip0wnif15x1TS1JFO1HQlTerrdbXJxROlF4qMpi03mQWSgJt9Y7ESvK68OjhT BYrNlMujMm/8qyU94NaT37ocW9/flsodnflK2nJsM3VBDEUgGirT53ZQ6IlgptK3Rl RBcjg8p+tf0Hyv8rTHMKjq+CpPMm1J6GC9jIA2NjxBM6lhnbRC8i5CGSAmivR7TgDr W6chRb5VoYw7d93cCHzLaFAbTXZR5x8lVbBCuTRPVqOxwWjFnUjcmv8ILXpEI0yiJk pKCf/f+dbsovpucP3qm8UlDG3bsF5tuziTjDx7JzRuf9aeW84HNURGvWfg7CkM8ipW uevS0aHd3F5Rg== 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 C9BDD3782072; Tue, 6 Feb 2024 08:02:26 +0000 (UTC) From: Benjamin Gaignard To: hverkuil@xs4all.nl, mchehab@kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v19 3/9] media: test-drivers: Set REQBUFS minimum number of buffers Date: Tue, 6 Feb 2024 09:02:13 +0100 Message-Id: <20240206080219.11951-4-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240206080219.11951-1-benjamin.gaignard@collabora.com> References: <20240206080219.11951-1-benjamin.gaignard@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Instead of using 'min_queued_buffers' field to specify the minimum number of buffers to be allocated when calling REQBUF use 'min_reqbufs_allocation' field which is dedicated to this purpose. While at it rename vivid_create_queue() parameter. Signed-off-by: Benjamin Gaignard --- drivers/media/test-drivers/vimc/vimc-capture.c | 2 +- drivers/media/test-drivers/vivid/vivid-core.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c index 2a2d19d23bab..97693561f1e4 100644 --- a/drivers/media/test-drivers/vimc/vimc-capture.c +++ b/drivers/media/test-drivers/vimc/vimc-capture.c @@ -432,7 +432,7 @@ static struct vimc_ent_device *vimc_capture_add(struct vimc_device *vimc, q->mem_ops = vimc_allocator == VIMC_ALLOCATOR_DMA_CONTIG ? &vb2_dma_contig_memops : &vb2_vmalloc_memops; q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; - q->min_queued_buffers = 2; + q->min_reqbufs_allocation = 2; q->lock = &vcapture->lock; q->dev = v4l2_dev->dev; diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/test-drivers/vivid/vivid-core.c index 159c72cbb5bf..11b8520d9f57 100644 --- a/drivers/media/test-drivers/vivid/vivid-core.c +++ b/drivers/media/test-drivers/vivid/vivid-core.c @@ -861,7 +861,7 @@ static const struct media_device_ops vivid_media_ops = { static int vivid_create_queue(struct vivid_dev *dev, struct vb2_queue *q, u32 buf_type, - unsigned int min_queued_buffers, + unsigned int min_reqbufs_allocation, const struct vb2_ops *ops) { if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->multiplanar) @@ -898,7 +898,7 @@ static int vivid_create_queue(struct vivid_dev *dev, q->mem_ops = allocators[dev->inst] == 1 ? &vb2_dma_contig_memops : &vb2_vmalloc_memops; q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; - q->min_queued_buffers = supports_requests[dev->inst] ? 0 : min_queued_buffers; + q->min_reqbufs_allocation = min_reqbufs_allocation; q->lock = &dev->mutex; q->dev = dev->v4l2_dev.dev; q->supports_requests = supports_requests[dev->inst]; From patchwork Tue Feb 6 08:02:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 13546838 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 52DD012B147; Tue, 6 Feb 2024 08:02:35 +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=1707206557; cv=none; b=eodgVnRNUbLQx4IFtPS2NPACUFkWDHg+1qUI6S+daN4DcWzuJSDrsJtZVmwxyYTbh31WwtOLWcm+uv49rb+4/WQWmXG57RNe6PYJV9Xb334ziAidNkkw+FPjJFalqThKqZbHnQAREVNBueH4fjlqdO5mIBYcQ8fE+2b+M1aKaJM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707206557; c=relaxed/simple; bh=PVD6UbpGFZ3dXoMYr+PQDkBOztGFikpm2rdgUqdMX08=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=UuNFxJsTXjYiCrffhbbfAm4dBrLjyEHTH430C2Ehi7y2zWx0k2wV72nRuKJc+gEzkIVKMDD5ECNYYQgIp0T5u4h0PIOLgj2eFQh+PJly6WzUmfnrP0Tm8OYdwTAgEmvANnc+buvv/dsunyTq8UKJ7XmiLKfxGDYgOu+z+4Qft/o= 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=pYOl9wai; 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="pYOl9wai" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1707206547; bh=PVD6UbpGFZ3dXoMYr+PQDkBOztGFikpm2rdgUqdMX08=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pYOl9wai3W/2P+M0/Z3xC+cFBZvAXtE8ex/W87SajXhBqpPHrJ/KD9VUMJ+gJmUgr Ra2qrGIgD1oZNAWfwnUDGqtIQ4l79DWdz5QEhSeiWvK8PxhyWaIfqzmVZkkR3poQxi tlF+0ov7EkCHca3IvD6LO6JrkEPkkaHdbd2/rqZ75B/JQH0OVN7ubrTkKff4xJ+0Yw L23xLLkvwiG5oIxwrGLP0bUdEotQ7SnKFz+ZIR/zdjrCVsIJyIHfesMVB07e/RjEEs DYEx3GMYAqce0wMpaYGnBuQHbuhhwMGuSlrf88f+35R4Er/v5g2L6SvUzKo4VwIbb3 m8a9di2PIvy6Q== 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 60F813782076; Tue, 6 Feb 2024 08:02:27 +0000 (UTC) From: Benjamin Gaignard To: hverkuil@xs4all.nl, mchehab@kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v19 4/9] media: core: Rework how create_buf index returned value is computed Date: Tue, 6 Feb 2024 09:02:14 +0100 Message-Id: <20240206080219.11951-5-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240206080219.11951-1-benjamin.gaignard@collabora.com> References: <20240206080219.11951-1-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 DELETE_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 ef5500d14c09..2a9ca70e99c7 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 From patchwork Tue Feb 6 08:02:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 13546841 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 9473B12B176; Tue, 6 Feb 2024 08:02:36 +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=1707206558; cv=none; b=NtXhcsq8eCB0C/PRvBD53citSX4qHMDU6FODZtFUhBiyXfuB8QoVsmBJEej7Yfyv33WFLIxqNn+Rb6b4FVz7NdCHQu3rKnCLdsCYKcMTIH16eEIVQsqsVHgUZmuc+eRkVe+KksjNpanrIW4STCLt+80GnZ2PSnKxBtNXxiUByOI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707206558; c=relaxed/simple; bh=sUbC7vuHTN50zvKn2VfoNDjyzyMo/J0seu1cP364rs4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=CEiUSfVL4rObqQUmbSQNezu6s5Y/e/tqupCqlDFsLrdt+3rVsMFRqZYJS2OJRMBL6FfTLwshvQsS6lVCAz+9FqXi6CQqXWRVlQPTfgbq19kzjvHUlYf+9WB1iAUFT93l7YUZxDmv0WFo3keK4hyGszsQk2jRH2YnKqqmhnXPbL4= 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=i2eCpqSO; 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="i2eCpqSO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1707206548; bh=sUbC7vuHTN50zvKn2VfoNDjyzyMo/J0seu1cP364rs4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i2eCpqSO/rtv5gq2hIRjhipgdQB6VK1m8er+9E0paKf2G2rRkaUBcsT30rewLnGx0 NTsk+uX8X4sUUw3W2uPddPq+/62RR50KZsrtyQjB+hISkTAlJ0r9yUhsrdYT9qnhaq LRWmBzKkuUxF/E7sowqvRoBK1bIPv+zHQ4eRmbCPMW089vU12k12cldC0pBjgRTRS9 NEznh0PGzx9OI8zPBReO5DMWIL61BB1ZrYiBGRRU8Oi3OAtSLf23LY6oC3DgRRipJV 7PW0WyOZYNblL0q5YmdZjPOyaFANhWfCAFX0docTdgKs9wZLsjMEOBsqR54l4PW4rJ xWU0M46kaB/+A== 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 EC6883782077; Tue, 6 Feb 2024 08:02:27 +0000 (UTC) From: Benjamin Gaignard To: hverkuil@xs4all.nl, mchehab@kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v19 5/9] media: core: Add bitmap manage bufs array entries Date: Tue, 6 Feb 2024 09:02:15 +0100 Message-Id: <20240206080219.11951-6-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240206080219.11951-1-benjamin.gaignard@collabora.com> References: <20240206080219.11951-1-benjamin.gaignard@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add a bitmap field to know which of bufs array entries are used or not. Remove no more used num_buffers field from queue structure. Use bitmap_find_next_zero_area() to find the first possible range when creating new buffers to fill the gaps. If no suitable range is found try to allocate less buffers than requested. Signed-off-by: Benjamin Gaignard --- .../media/common/videobuf2/videobuf2-core.c | 71 ++++++++++++++----- include/media/videobuf2-core.h | 18 +++-- 2 files changed, 64 insertions(+), 25 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 8e819d198c34..ec81426d4d79 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -421,11 +421,12 @@ static void init_buffer_cache_hints(struct vb2_queue *q, struct vb2_buffer *vb) */ static void vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb, unsigned int index) { - WARN_ON(index >= q->max_num_buffers || q->bufs[index] || vb->vb2_queue); + WARN_ON(index >= q->max_num_buffers || test_bit(index, q->bufs_bitmap) || vb->vb2_queue); q->bufs[index] = vb; vb->index = index; vb->vb2_queue = q; + set_bit(index, q->bufs_bitmap); } /** @@ -434,6 +435,7 @@ static void vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb, uns */ static void vb2_queue_remove_buffer(struct vb2_buffer *vb) { + clear_bit(vb->index, vb->vb2_queue->bufs_bitmap); vb->vb2_queue->bufs[vb->index] = NULL; vb->vb2_queue = NULL; } @@ -452,9 +454,9 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, 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; struct vb2_buffer *vb; + unsigned long index = q->max_num_buffers; int ret; /* @@ -462,9 +464,25 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, * in the queue is below q->max_num_buffers */ num_buffers = min_t(unsigned int, num_buffers, - q->max_num_buffers - q_num_buffers); + q->max_num_buffers - vb2_get_num_buffers(q)); + + while (num_buffers) { + index = bitmap_find_next_zero_area(q->bufs_bitmap, q->max_num_buffers, + 0, num_buffers, 0); + + if (index < q->max_num_buffers) + break; + /* Try to find free space for less buffers */ + num_buffers--; + } + + /* If there is no space left to allocate buffers return 0 to indicate the error */ + if (!num_buffers) { + *first_index = 0; + return 0; + } - *first_index = q_num_buffers; + *first_index = index; for (buffer = 0; buffer < num_buffers; ++buffer) { /* Allocate vb2 buffer structures */ @@ -484,7 +502,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, vb->planes[plane].min_length = plane_sizes[plane]; } - vb2_queue_add_buffer(q, vb, q_num_buffers + buffer); + vb2_queue_add_buffer(q, vb, index++); call_void_bufop(q, init_buffer, vb); /* Allocate video buffer memory for the MMAP type */ @@ -664,7 +682,6 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) kfree(vb); } - q->num_buffers -= buffers; if (!vb2_get_num_buffers(q)) { q->memory = VB2_MEMORY_UNKNOWN; INIT_LIST_HEAD(&q->queued_list); @@ -818,6 +835,32 @@ static bool verify_coherency_flags(struct vb2_queue *q, bool non_coherent_mem) return true; } +static int vb2_core_allocated_buffers_storage(struct vb2_queue *q) +{ + if (!q->bufs) + q->bufs = kcalloc(q->max_num_buffers, sizeof(*q->bufs), GFP_KERNEL); + if (!q->bufs) + return -ENOMEM; + + if (!q->bufs_bitmap) + q->bufs_bitmap = bitmap_zalloc(q->max_num_buffers, GFP_KERNEL); + if (!q->bufs_bitmap) { + kfree(q->bufs); + q->bufs = NULL; + return -ENOMEM; + } + + return 0; +} + +static void vb2_core_free_buffers_storage(struct vb2_queue *q) +{ + kfree(q->bufs); + q->bufs = NULL; + bitmap_free(q->bufs_bitmap); + q->bufs_bitmap = NULL; +} + int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, unsigned int flags, unsigned int *count) { @@ -879,10 +922,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, * in the queue_setup op. */ mutex_lock(&q->mmap_lock); - if (!q->bufs) - q->bufs = kcalloc(q->max_num_buffers, sizeof(*q->bufs), GFP_KERNEL); - if (!q->bufs) - ret = -ENOMEM; + ret = vb2_core_allocated_buffers_storage(q); q->memory = memory; mutex_unlock(&q->mmap_lock); if (ret) @@ -954,7 +994,6 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, } mutex_lock(&q->mmap_lock); - q->num_buffers = allocated_buffers; if (ret < 0) { /* @@ -982,6 +1021,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, mutex_lock(&q->mmap_lock); q->memory = VB2_MEMORY_UNKNOWN; mutex_unlock(&q->mmap_lock); + vb2_core_free_buffers_storage(q); return ret; } EXPORT_SYMBOL_GPL(vb2_core_reqbufs); @@ -1015,11 +1055,8 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, * value in the queue_setup op. */ mutex_lock(&q->mmap_lock); + ret = vb2_core_allocated_buffers_storage(q); q->memory = memory; - if (!q->bufs) - q->bufs = kcalloc(q->max_num_buffers, sizeof(*q->bufs), GFP_KERNEL); - if (!q->bufs) - ret = -ENOMEM; mutex_unlock(&q->mmap_lock); if (ret) return ret; @@ -1082,7 +1119,6 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, } mutex_lock(&q->mmap_lock); - q->num_buffers += allocated_buffers; if (ret < 0) { /* @@ -2583,8 +2619,7 @@ void vb2_core_queue_release(struct vb2_queue *q) __vb2_queue_cancel(q); mutex_lock(&q->mmap_lock); __vb2_queue_free(q, vb2_get_num_buffers(q)); - kfree(q->bufs); - q->bufs = NULL; + vb2_core_free_buffers_storage(q); q->is_busy = 0; mutex_unlock(&q->mmap_lock); } diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 2a9ca70e99c7..88e35a3b7730 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -346,8 +346,8 @@ struct vb2_buffer { * describes the requested number of planes and sizes\[\] * contains the requested plane sizes. In this case * \*num_buffers are being allocated additionally to - * q->num_buffers. If either \*num_planes or the requested - * sizes are invalid callback must return %-EINVAL. + * the buffers already allocated. If either \*num_planes + * or the requested sizes are invalid callback must return %-EINVAL. * @wait_prepare: release any locks taken while calling vb2 functions; * it is called before an ioctl needs to wait for a new * buffer to arrive; required to avoid a deadlock in @@ -571,8 +571,9 @@ struct vb2_buf_ops { * @mmap_lock: private mutex used when buffers are allocated/freed/mmapped * @memory: current memory type used * @dma_dir: DMA mapping direction. - * @bufs: videobuf2 buffer structures - * @num_buffers: number of allocated/used buffers + * @bufs: videobuf2 buffer structures. If it is non-NULL then + * bufs_bitmap is also non-NULL. + * @bufs_bitmap: bitmap tracking whether each bufs[] entry is used * @max_num_buffers: upper limit of number of allocated/used buffers. * If set to 0 v4l2 core will change it VB2_MAX_FRAME * for backward compatibility. @@ -640,7 +641,7 @@ struct vb2_queue { unsigned int memory; enum dma_data_direction dma_dir; struct vb2_buffer **bufs; - unsigned int num_buffers; + unsigned long *bufs_bitmap; unsigned int max_num_buffers; struct list_head queued_list; @@ -1170,7 +1171,10 @@ static inline bool vb2_fileio_is_active(struct vb2_queue *q) */ static inline unsigned int vb2_get_num_buffers(struct vb2_queue *q) { - return q->num_buffers; + if (q->bufs_bitmap) + return bitmap_weight(q->bufs_bitmap, q->max_num_buffers); + + return 0; } /** @@ -1279,7 +1283,7 @@ static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q, if (index >= q->max_num_buffers) return NULL; - if (index < q->num_buffers) + if (test_bit(index, q->bufs_bitmap)) return q->bufs[index]; return NULL; } From patchwork Tue Feb 6 08:02:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 13546839 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 94AA612B17C; Tue, 6 Feb 2024 08:02:36 +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=1707206558; cv=none; b=P/AnnclQnRdkzNmCqhTRxKe21N+N8rta4EongstFNVs5I/wN7K+3+/aFx4trVd08Qd5HlBSFRaiugxGA8+cynI82T3urhwxDqPiFGPEU1P9vPgxsmRzrZ594HWTGEc7GF7LaZ7qU4tlYsbgLM/Ky6rl8BhoMJWafEIQIQO9k0Uc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707206558; c=relaxed/simple; bh=xBHj61ms77yh6TofIx3mWpzyvQ5wa//86PofqFg3BeI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=VhyejyJA4QgE+/liEIyvQNwzUgqoA2rukgid2gTcMteJf73+8O5oiAzxJFQY8Z7H3RUni+U3TtD0IMope4OsmeD8s0/U2L9syAtdYpI+O7qFKuUCjcpgTIgQD03aZd2lBe7RsXL+RTm5CYaSqczWC+mRio1LgnM65cgxZOjF4HU= 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=2boi32CX; 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="2boi32CX" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1707206548; bh=xBHj61ms77yh6TofIx3mWpzyvQ5wa//86PofqFg3BeI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2boi32CXtzJYVxlJLb+Ke7oBE0hDseg31wgBH0T2ypsbwgQUna2tKNBlXJw07LxLU /xt5UOPDztGLhXFBMm5dvcuePmw3+xV24ukmI+S3vTAQ/A38E9bY85tBVJPZkOHQz1 F8KLfKWKfNwgfhrljLFaueEo+snG+bqGBlp4GK6wYJRSHoPxvZcrLV2ZceQ6Inpqgx MjPCU5TT7recpEXz8tXnoa5gVvHUje+Blh73PhygC5u6xD4MMYpyhpj2MCVvPGADln grLZCOkcRJ8tzlAq1VMw7OHyPCraF3IhCKbCd8BONsXQ35Tq7eahXXxCI9ng93e8L9 ojoDW18ppoSCQ== 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 8370E378207E; Tue, 6 Feb 2024 08:02:28 +0000 (UTC) From: Benjamin Gaignard To: hverkuil@xs4all.nl, mchehab@kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v19 6/9] media: core: Free range of buffers Date: Tue, 6 Feb 2024 09:02:16 +0100 Message-Id: <20240206080219.11951-7-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240206080219.11951-1-benjamin.gaignard@collabora.com> References: <20240206080219.11951-1-benjamin.gaignard@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Improve __vb2_queue_free() and __vb2_free_mem() to free range of buffers and not only the last few buffers. Introduce starting index to be flexible on range and change the loops according to this parameter. Signed-off-by: Benjamin Gaignard --- .../media/common/videobuf2/videobuf2-core.c | 56 +++++++++---------- 1 file changed, 26 insertions(+), 30 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index ec81426d4d79..009cea95d662 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -540,17 +540,16 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, } /* - * __vb2_free_mem() - release all video buffer memory for a given queue + * __vb2_free_mem() - release video buffer memory for a given range of + * buffers in a given queue */ -static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers) +static void __vb2_free_mem(struct vb2_queue *q, unsigned int start, unsigned int count) { - unsigned int buffer; + unsigned int i; struct vb2_buffer *vb; - unsigned int q_num_buffers = vb2_get_num_buffers(q); - for (buffer = q_num_buffers - buffers; buffer < q_num_buffers; - ++buffer) { - vb = vb2_get_buffer(q, buffer); + for (i = start; i < start + count; i++) { + vb = vb2_get_buffer(q, i); if (!vb) continue; @@ -565,35 +564,33 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers) } /* - * __vb2_queue_free() - free buffers at the end of the queue - video memory and + * __vb2_queue_free() - free @count buffers from @start index of the queue - video memory and * related information, if no buffers are left return the queue to an * uninitialized state. Might be called even if the queue has already been freed. */ -static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) +static void __vb2_queue_free(struct vb2_queue *q, unsigned int start, unsigned int count) { - unsigned int buffer; - unsigned int q_num_buffers = vb2_get_num_buffers(q); + unsigned int i; lockdep_assert_held(&q->mmap_lock); /* Call driver-provided cleanup function for each buffer, if provided */ - for (buffer = q_num_buffers - buffers; buffer < q_num_buffers; - ++buffer) { - struct vb2_buffer *vb = vb2_get_buffer(q, buffer); + for (i = start; i < start + count; i++) { + struct vb2_buffer *vb = vb2_get_buffer(q, i); if (vb && vb->planes[0].mem_priv) call_void_vb_qop(vb, buf_cleanup, vb); } /* Release video buffer memory */ - __vb2_free_mem(q, buffers); + __vb2_free_mem(q, start, count); #ifdef CONFIG_VIDEO_ADV_DEBUG /* * Check that all the calls were balanced during the life-time of this * queue. If not then dump the counters to the kernel log. */ - if (q_num_buffers) { + if (vb2_get_num_buffers(q)) { bool unbalanced = q->cnt_start_streaming != q->cnt_stop_streaming || q->cnt_prepare_streaming != q->cnt_unprepare_streaming || q->cnt_wait_prepare != q->cnt_wait_finish; @@ -619,8 +616,8 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) q->cnt_stop_streaming = 0; q->cnt_unprepare_streaming = 0; } - for (buffer = 0; buffer < vb2_get_num_buffers(q); buffer++) { - struct vb2_buffer *vb = vb2_get_buffer(q, buffer); + for (i = start; i < start + count; i++) { + struct vb2_buffer *vb = vb2_get_buffer(q, i); bool unbalanced; if (!vb) @@ -637,7 +634,7 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) if (unbalanced) { pr_info("unbalanced counters for queue %p, buffer %d:\n", - q, buffer); + q, i); if (vb->cnt_buf_init != vb->cnt_buf_cleanup) pr_info(" buf_init: %u buf_cleanup: %u\n", vb->cnt_buf_init, vb->cnt_buf_cleanup); @@ -671,9 +668,8 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) #endif /* Free vb2 buffers */ - for (buffer = q_num_buffers - buffers; buffer < q_num_buffers; - ++buffer) { - struct vb2_buffer *vb = vb2_get_buffer(q, buffer); + for (i = start; i < start + count; i++) { + struct vb2_buffer *vb = vb2_get_buffer(q, i); if (!vb) continue; @@ -713,7 +709,7 @@ EXPORT_SYMBOL(vb2_buffer_in_use); static bool __buffers_in_use(struct vb2_queue *q) { unsigned int buffer; - for (buffer = 0; buffer < vb2_get_num_buffers(q); ++buffer) { + for (buffer = 0; buffer < q->max_num_buffers; ++buffer) { struct vb2_buffer *vb = vb2_get_buffer(q, buffer); if (!vb) @@ -899,7 +895,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, * queued without ever calling STREAMON. */ __vb2_queue_cancel(q); - __vb2_queue_free(q, q_num_bufs); + __vb2_queue_free(q, 0, q->max_num_buffers); mutex_unlock(&q->mmap_lock); q->is_busy = 0; @@ -1001,7 +997,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, * from already queued buffers and it will reset q->memory to * VB2_MEMORY_UNKNOWN. */ - __vb2_queue_free(q, allocated_buffers); + __vb2_queue_free(q, first_index, allocated_buffers); mutex_unlock(&q->mmap_lock); return ret; } @@ -1126,7 +1122,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, * from already queued buffers and it will reset q->memory to * VB2_MEMORY_UNKNOWN. */ - __vb2_queue_free(q, allocated_buffers); + __vb2_queue_free(q, *first_index, allocated_buffers); mutex_unlock(&q->mmap_lock); return -ENOMEM; } @@ -1741,7 +1737,7 @@ static int vb2_start_streaming(struct vb2_queue *q) * Forcefully reclaim buffers if the driver did not * correctly return them to vb2. */ - for (i = 0; i < vb2_get_num_buffers(q); ++i) { + for (i = 0; i < q->max_num_buffers; ++i) { vb = vb2_get_buffer(q, i); if (!vb) @@ -2147,7 +2143,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q) * to vb2 in stop_streaming(). */ if (WARN_ON(atomic_read(&q->owned_by_drv_count))) { - for (i = 0; i < vb2_get_num_buffers(q); i++) { + for (i = 0; i < q->max_num_buffers; i++) { struct vb2_buffer *vb = vb2_get_buffer(q, i); if (!vb) @@ -2191,7 +2187,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q) * call to __fill_user_buffer() after buf_finish(). That order can't * be changed, so we can't move the buf_finish() to __vb2_dqbuf(). */ - for (i = 0; i < vb2_get_num_buffers(q); i++) { + for (i = 0; i < q->max_num_buffers; i++) { struct vb2_buffer *vb; struct media_request *req; @@ -2618,7 +2614,7 @@ void vb2_core_queue_release(struct vb2_queue *q) __vb2_cleanup_fileio(q); __vb2_queue_cancel(q); mutex_lock(&q->mmap_lock); - __vb2_queue_free(q, vb2_get_num_buffers(q)); + __vb2_queue_free(q, 0, q->max_num_buffers); vb2_core_free_buffers_storage(q); q->is_busy = 0; mutex_unlock(&q->mmap_lock); From patchwork Tue Feb 6 08:02:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 13546842 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 BCDDF12BE95; Tue, 6 Feb 2024 08:02:36 +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=1707206559; cv=none; b=uAuvAbzW9EnRV63bqS64eTrPUDeYhOPHOhTYNMym0yIqoMino4vqfAyUpCn36f9kawKPhfwT4ORLVEDs4Cw1j5kfzIHwjEgaeiKxK0BWScl8rFBqQ0MzIH7of0vPwAJff+7Rll/+h8RxRhqBJPJflMSGy8ALvvpxyanZZNE89xI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707206559; c=relaxed/simple; bh=GWxQq9cdwZMg27lCcjXNdFGfissZ/bK38L1X9yZMB1Y=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=kVlDfn0464Zx974c1BwMr/s9xHKIb4uw5tb81miqszp1xOLGUZ3WAhqWEVMS/iLo+Gx5rbFA0NVmdXKnMqnjHJUCvpEXDsMojp80W3Lhoh17VUT0xbBsfrn1CsSyuTrHIlgVKChglaiFkwk87dgmIhWqKeTqj4zU+WVjINbPmFs= 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=Nlphf9UB; 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="Nlphf9UB" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1707206549; bh=GWxQq9cdwZMg27lCcjXNdFGfissZ/bK38L1X9yZMB1Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Nlphf9UBH710Tc32kSrUWSqsfkcNi7DveYyg1NOltHIR/GDJ0DFUV7Kzd/F8Yaxxr skV5GJhOgm5ppBrkrBwlSPSlYfE+yVCXHS8P2mNFA46RFZ3z0Kn/pTjPXVxVBS022V RT2zQC2WL5FVe6GM70Gm+n/PCNWjzjxqtDwGtK4334ifNuBcExIFRqbsIWZpMvyRKm bu87fwWvgp0uevXzd6cGq1yCV5h1F/te5uRaxSCim8FKlSkg4/KVmh8VTjMEAeGC7p 7jsO5h1sJRT31rVPIWK2Md93IEj1nVUAaPZjc3uGFCnFbFrnrzpGS1S0dA2ChMrDnR lZIGzSxNqOspA== 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 1AFC03782080; Tue, 6 Feb 2024 08:02:29 +0000 (UTC) From: Benjamin Gaignard To: hverkuil@xs4all.nl, mchehab@kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v19 7/9] media: v4l2: Add DELETE_BUFS ioctl Date: Tue, 6 Feb 2024 09:02:17 +0100 Message-Id: <20240206080219.11951-8-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240206080219.11951-1-benjamin.gaignard@collabora.com> References: <20240206080219.11951-1-benjamin.gaignard@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 VIDIOC_DELETE_BUFS ioctl allows to delete buffers from a queue. The number of buffers to delete in given by count field of struct v4l2_delete_buffers and the range start at the index specified in the same structure. Signed-off-by: Benjamin Gaignard --- version 19: - Fix documentation - Change where DELETE_BUFS is enabled .../userspace-api/media/v4l/user-func.rst | 1 + .../media/v4l/vidioc-delete-bufs.rst | 79 +++++++++++++++++++ .../media/common/videobuf2/videobuf2-core.c | 38 +++++++++ .../media/common/videobuf2/videobuf2-v4l2.c | 12 +++ drivers/media/v4l2-core/v4l2-dev.c | 3 + drivers/media/v4l2-core/v4l2-ioctl.c | 24 ++++++ include/media/v4l2-ioctl.h | 4 + include/media/videobuf2-core.h | 10 +++ include/media/videobuf2-v4l2.h | 2 + include/uapi/linux/videodev2.h | 16 ++++ 10 files changed, 189 insertions(+) create mode 100644 Documentation/userspace-api/media/v4l/vidioc-delete-bufs.rst diff --git a/Documentation/userspace-api/media/v4l/user-func.rst b/Documentation/userspace-api/media/v4l/user-func.rst index 15ff0bf7bbe6..3fd567695477 100644 --- a/Documentation/userspace-api/media/v4l/user-func.rst +++ b/Documentation/userspace-api/media/v4l/user-func.rst @@ -17,6 +17,7 @@ Function Reference vidioc-dbg-g-chip-info vidioc-dbg-g-register vidioc-decoder-cmd + vidioc-delete-bufs vidioc-dqevent vidioc-dv-timings-cap vidioc-encoder-cmd diff --git a/Documentation/userspace-api/media/v4l/vidioc-delete-bufs.rst b/Documentation/userspace-api/media/v4l/vidioc-delete-bufs.rst new file mode 100644 index 000000000000..7900a86bb576 --- /dev/null +++ b/Documentation/userspace-api/media/v4l/vidioc-delete-bufs.rst @@ -0,0 +1,79 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: V4L + +.. _VIDIOC_DELETE_BUFS: + +************************ +ioctl VIDIOC_DELETE_BUFS +************************ + +Name +==== + +VIDIOC_DELETE_BUFS - Deletes buffers from a queue + +Synopsis +======== + +.. c:macro:: VIDIOC_DELETE_BUFS + +``int ioctl(int fd, VIDIOC_DELETE_BUFS, struct v4l2_delete_buffers *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + Pointer to struct :c:type:`v4l2_delete_buffers`. + +Description +=========== + +Applications can optionally call the :ref:`VIDIOC_DELETE_BUFS` ioctl to +delete buffers from a queue. +:ref:`VIDIOC_CREATE_BUFS` ioctl support is mandatory to enable :ref:`VIDIOC_DELETE_BUFS`. + +.. c:type:: v4l2_delete_buffers + +.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.5cm}| + +.. flat-table:: struct v4l2_delete_buffers + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - __u32 + - ``index`` + - The starting buffer index to delete. + * - __u32 + - ``count`` + - The number of buffers to be deleted with indices 'index' until 'index + count - 1'. + All buffers in this range must be valid and in DEQUEUED state. + If count is set to 0 :ref:`VIDIOC_DELETE_BUFS` will do nothing and return 0. + * - __u32 + - ``type`` + - Type of the stream or buffers, this is the same as the struct + :c:type:`v4l2_format` ``type`` field. See + :c:type:`v4l2_buf_type` for valid values. + * - __u32 + - ``reserved``\ [13] + - A place holder for future extensions. Drivers and applications + must set the array to zero. + +Return Value +============ + +On success 0 is returned, on error -1 and the ``errno`` variable is set +appropriately. The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. + +EBUSY + File I/O is in progress. + One or more of the buffers in the range ``index`` to ``index + count - 1`` are not + in DEQUEUED state. + +EINVAL + One or more of the buffers in the range ``index`` to ``index + count - 1`` do not + exist in the queue. diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 009cea95d662..da1fc84c13c3 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -1691,6 +1691,44 @@ int vb2_core_prepare_buf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb) } EXPORT_SYMBOL_GPL(vb2_core_prepare_buf); +int vb2_core_delete_bufs(struct vb2_queue *q, unsigned int start, unsigned int count) +{ + unsigned int i, ret = 0; + unsigned int q_num_bufs = vb2_get_num_buffers(q); + + if (count == 0) + return 0; + + if (count > q_num_bufs) + return -EINVAL; + + if (start > q->max_num_buffers - count) + return -EINVAL; + + mutex_lock(&q->mmap_lock); + + /* Check that all buffers in the range exist */ + for (i = start; i < start + count; i++) { + struct vb2_buffer *vb = vb2_get_buffer(q, i); + + if (!vb) { + ret = -EINVAL; + goto unlock; + } + if (vb->state != VB2_BUF_STATE_DEQUEUED) { + ret = -EBUSY; + goto unlock; + } + } + __vb2_queue_free(q, start, count); + dprintk(q, 2, "%u buffers deleted\n", count); + +unlock: + mutex_unlock(&q->mmap_lock); + return ret; +} +EXPORT_SYMBOL_GPL(vb2_core_delete_bufs); + /* * vb2_start_streaming() - Attempt to start streaming. * @q: videobuf2 queue diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index 03e8080a68a8..8e437104f9c1 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -1001,6 +1001,18 @@ EXPORT_SYMBOL_GPL(vb2_poll); /* vb2 ioctl helpers */ +int vb2_ioctl_delete_bufs(struct file *file, void *priv, + struct v4l2_delete_buffers *d) +{ + struct video_device *vdev = video_devdata(file); + + if (vb2_queue_is_busy(vdev->queue, file)) + return -EBUSY; + + return vb2_core_delete_bufs(vdev->queue, d->index, d->count); +} +EXPORT_SYMBOL_GPL(vb2_ioctl_delete_bufs); + int vb2_ioctl_reqbufs(struct file *file, void *priv, struct v4l2_requestbuffers *p) { diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c index d13954bd31fd..af83424ae8cd 100644 --- a/drivers/media/v4l2-core/v4l2-dev.c +++ b/drivers/media/v4l2-core/v4l2-dev.c @@ -722,6 +722,9 @@ static void determine_valid_ioctls(struct video_device *vdev) SET_VALID_IOCTL(ops, VIDIOC_PREPARE_BUF, vidioc_prepare_buf); SET_VALID_IOCTL(ops, VIDIOC_STREAMON, vidioc_streamon); SET_VALID_IOCTL(ops, VIDIOC_STREAMOFF, vidioc_streamoff); + /* VIDIOC_CREATE_BUFS support is mandatory to enable VIDIOC_DELETE_BUFS */ + if (ops->vidioc_create_bufs) + SET_VALID_IOCTL(ops, VIDIOC_DELETE_BUFS, vidioc_delete_bufs); } if (is_vid || is_vbi || is_meta) { diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 33076af4dfdb..a172d33edd19 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -489,6 +489,14 @@ static void v4l_print_create_buffers(const void *arg, bool write_only) v4l_print_format(&p->format, write_only); } +static void v4l_print_delete_buffers(const void *arg, bool write_only) +{ + const struct v4l2_delete_buffers *p = arg; + + pr_cont("type=%s, index=%u, count=%u\n", + prt_names(p->type, v4l2_type_names), p->index, p->count); +} + static void v4l_print_streamparm(const void *arg, bool write_only) { const struct v4l2_streamparm *p = arg; @@ -2161,6 +2169,21 @@ static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); } +static int v4l_delete_bufs(const struct v4l2_ioctl_ops *ops, + struct file *file, void *fh, void *arg) +{ + struct v4l2_delete_buffers *delete = arg; + int ret = check_fmt(file, delete->type); + + if (ret) + return ret; + + if (ops->vidioc_delete_bufs) + return ops->vidioc_delete_bufs(file, fh, delete); + + return -ENOTTY; +} + static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, struct file *file, void *fh, void *arg) { @@ -2910,6 +2933,7 @@ static const struct v4l2_ioctl_info v4l2_ioctls[] = { IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), IOCTL_INFO(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)), IOCTL_INFO(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)), + IOCTL_INFO(VIDIOC_DELETE_BUFS, v4l_delete_bufs, v4l_print_delete_buffers, INFO_FL_PRIO | INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_delete_buffers, type)), }; #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) diff --git a/include/media/v4l2-ioctl.h b/include/media/v4l2-ioctl.h index edb733f21604..55afbde54211 100644 --- a/include/media/v4l2-ioctl.h +++ b/include/media/v4l2-ioctl.h @@ -163,6 +163,8 @@ struct v4l2_fh; * :ref:`VIDIOC_CREATE_BUFS ` ioctl * @vidioc_prepare_buf: pointer to the function that implements * :ref:`VIDIOC_PREPARE_BUF ` ioctl + * @vidioc_delete_bufs: pointer to the function that implements + * :ref:`VIDIOC_DELETE_BUFS ` ioctl * @vidioc_overlay: pointer to the function that implements * :ref:`VIDIOC_OVERLAY ` ioctl * @vidioc_g_fbuf: pointer to the function that implements @@ -422,6 +424,8 @@ struct v4l2_ioctl_ops { struct v4l2_create_buffers *b); int (*vidioc_prepare_buf)(struct file *file, void *fh, struct v4l2_buffer *b); + int (*vidioc_delete_bufs)(struct file *file, void *fh, + struct v4l2_delete_buffers *d); int (*vidioc_overlay)(struct file *file, void *fh, unsigned int i); int (*vidioc_g_fbuf)(struct file *file, void *fh, diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 88e35a3b7730..0d17e5605c09 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -867,6 +867,16 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, */ int vb2_core_prepare_buf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb); +/** + * vb2_core_delete_bufs() - + * @q: pointer to &struct vb2_queue with videobuf2 queue. + * @start: first index of the range of buffers to delete. + * @count: number of buffers to delete. + * + * Return: returns zero on success; an error code otherwise. + */ +int vb2_core_delete_bufs(struct vb2_queue *q, unsigned int start, unsigned int count); + /** * vb2_core_qbuf() - Queue a buffer from userspace * diff --git a/include/media/videobuf2-v4l2.h b/include/media/videobuf2-v4l2.h index 5a845887850b..ddc08623606c 100644 --- a/include/media/videobuf2-v4l2.h +++ b/include/media/videobuf2-v4l2.h @@ -334,6 +334,8 @@ int vb2_ioctl_streamon(struct file *file, void *priv, enum v4l2_buf_type i); int vb2_ioctl_streamoff(struct file *file, void *priv, enum v4l2_buf_type i); int vb2_ioctl_expbuf(struct file *file, void *priv, struct v4l2_exportbuffer *p); +int vb2_ioctl_delete_bufs(struct file *file, void *priv, + struct v4l2_delete_buffers *p); /* struct v4l2_file_operations helpers */ diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 68e7ac178cc2..47fdd17babbb 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -2624,6 +2624,20 @@ struct v4l2_create_buffers { __u32 reserved[5]; }; +/** + * struct v4l2_delete_buffers - VIDIOC_DELETE_BUFS argument + * @index: the first buffer to be deleted + * @count: number of buffers to delete + * @type: enum v4l2_buf_type + * @reserved: future extensions + */ +struct v4l2_delete_buffers { + __u32 index; + __u32 count; + __u32 type; + __u32 reserved[13]; +}; + /* * I O C T L C O D E S F O R V I D E O D E V I C E S * @@ -2723,6 +2737,8 @@ struct v4l2_create_buffers { #define VIDIOC_DBG_G_CHIP_INFO _IOWR('V', 102, struct v4l2_dbg_chip_info) #define VIDIOC_QUERY_EXT_CTRL _IOWR('V', 103, struct v4l2_query_ext_ctrl) +#define VIDIOC_DELETE_BUFS _IOWR('V', 104, struct v4l2_delete_buffers) + /* Reminder: when adding new ioctls please add support for them to drivers/media/v4l2-core/v4l2-compat-ioctl32.c as well! */ From patchwork Tue Feb 6 08:02:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 13546840 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 BCD7C12BE94; 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(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 A55093782085; Tue, 6 Feb 2024 08:02:29 +0000 (UTC) From: Benjamin Gaignard To: hverkuil@xs4all.nl, mchehab@kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v19 8/9] media: v4l2: Add mem2mem helpers for DELETE_BUFS ioctl Date: Tue, 6 Feb 2024 09:02:18 +0100 Message-Id: <20240206080219.11951-9-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240206080219.11951-1-benjamin.gaignard@collabora.com> References: <20240206080219.11951-1-benjamin.gaignard@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Create v4l2-mem2mem helpers for VIDIOC_DELETE_BUFS ioctl and make test drivers use it. Signed-off-by: Benjamin Gaignard --- drivers/media/test-drivers/vicodec/vicodec-core.c | 1 + drivers/media/test-drivers/vim2m.c | 1 + drivers/media/test-drivers/vimc/vimc-capture.c | 1 + drivers/media/test-drivers/visl/visl-video.c | 1 + drivers/media/test-drivers/vivid/vivid-core.c | 1 + drivers/media/v4l2-core/v4l2-mem2mem.c | 10 ++++++++++ include/media/v4l2-mem2mem.h | 2 ++ 7 files changed, 17 insertions(+) diff --git a/drivers/media/test-drivers/vicodec/vicodec-core.c b/drivers/media/test-drivers/vicodec/vicodec-core.c index e13f5452b927..5a2d34ac12c2 100644 --- a/drivers/media/test-drivers/vicodec/vicodec-core.c +++ b/drivers/media/test-drivers/vicodec/vicodec-core.c @@ -1345,6 +1345,7 @@ static const struct v4l2_ioctl_ops vicodec_ioctl_ops = { .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf, .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs, .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, + .vidioc_delete_bufs = v4l2_m2m_ioctl_delete_bufs, .vidioc_streamon = v4l2_m2m_ioctl_streamon, .vidioc_streamoff = v4l2_m2m_ioctl_streamoff, diff --git a/drivers/media/test-drivers/vim2m.c b/drivers/media/test-drivers/vim2m.c index 3e3b424b4860..10bd8c92e340 100644 --- a/drivers/media/test-drivers/vim2m.c +++ b/drivers/media/test-drivers/vim2m.c @@ -960,6 +960,7 @@ static const struct v4l2_ioctl_ops vim2m_ioctl_ops = { .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf, .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf, .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs, + .vidioc_delete_bufs = v4l2_m2m_ioctl_delete_bufs, .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, .vidioc_streamon = v4l2_m2m_ioctl_streamon, diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c index 97693561f1e4..adeb7727fade 100644 --- a/drivers/media/test-drivers/vimc/vimc-capture.c +++ b/drivers/media/test-drivers/vimc/vimc-capture.c @@ -221,6 +221,7 @@ static const struct v4l2_ioctl_ops vimc_capture_ioctl_ops = { .vidioc_expbuf = vb2_ioctl_expbuf, .vidioc_streamon = vb2_ioctl_streamon, .vidioc_streamoff = vb2_ioctl_streamoff, + .vidioc_delete_bufs = vb2_ioctl_delete_bufs, }; static void vimc_capture_return_all_buffers(struct vimc_capture_device *vcapture, diff --git a/drivers/media/test-drivers/visl/visl-video.c b/drivers/media/test-drivers/visl/visl-video.c index b9a4b44bd0ed..e8c4216e7526 100644 --- a/drivers/media/test-drivers/visl/visl-video.c +++ b/drivers/media/test-drivers/visl/visl-video.c @@ -539,6 +539,7 @@ const struct v4l2_ioctl_ops visl_ioctl_ops = { .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf, .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs, .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, + .vidioc_delete_bufs = v4l2_m2m_ioctl_delete_bufs, .vidioc_streamon = v4l2_m2m_ioctl_streamon, .vidioc_streamoff = v4l2_m2m_ioctl_streamoff, diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/test-drivers/vivid/vivid-core.c index 11b8520d9f57..f772069fb1a4 100644 --- a/drivers/media/test-drivers/vivid/vivid-core.c +++ b/drivers/media/test-drivers/vivid/vivid-core.c @@ -769,6 +769,7 @@ static const struct v4l2_ioctl_ops vivid_ioctl_ops = { .vidioc_expbuf = vb2_ioctl_expbuf, .vidioc_streamon = vb2_ioctl_streamon, .vidioc_streamoff = vb2_ioctl_streamoff, + .vidioc_delete_bufs = vb2_ioctl_delete_bufs, .vidioc_enum_input = vivid_enum_input, .vidioc_g_input = vivid_g_input, diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c index 9e983176542b..6e36a04d415c 100644 --- a/drivers/media/v4l2-core/v4l2-mem2mem.c +++ b/drivers/media/v4l2-core/v4l2-mem2mem.c @@ -1380,6 +1380,16 @@ int v4l2_m2m_ioctl_create_bufs(struct file *file, void *priv, } EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_create_bufs); +int v4l2_m2m_ioctl_delete_bufs(struct file *file, void *priv, + struct v4l2_delete_buffers *d) +{ + struct v4l2_fh *fh = file->private_data; + + return vb2_core_delete_bufs(v4l2_m2m_get_vq(fh->m2m_ctx, d->type), + d->index, d->count); +} +EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_delete_bufs); + int v4l2_m2m_ioctl_querybuf(struct file *file, void *priv, struct v4l2_buffer *buf) { diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h index 7f1af1f7f912..402bea36093b 100644 --- a/include/media/v4l2-mem2mem.h +++ b/include/media/v4l2-mem2mem.h @@ -867,6 +867,8 @@ int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv, struct v4l2_requestbuffers *rb); int v4l2_m2m_ioctl_create_bufs(struct file *file, void *fh, struct v4l2_create_buffers *create); +int v4l2_m2m_ioctl_delete_bufs(struct file *file, void *priv, + struct v4l2_delete_buffers *d); int v4l2_m2m_ioctl_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf); int v4l2_m2m_ioctl_expbuf(struct file *file, void *fh, From patchwork Tue Feb 6 08:02:19 2024 Content-Type: text/plain; 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(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 3861D3782087; Tue, 6 Feb 2024 08:02:30 +0000 (UTC) From: Benjamin Gaignard To: hverkuil@xs4all.nl, mchehab@kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v19 9/9] media: verisilicon: Support deleting buffers on capture queue Date: Tue, 6 Feb 2024 09:02:19 +0100 Message-Id: <20240206080219.11951-10-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240206080219.11951-1-benjamin.gaignard@collabora.com> References: <20240206080219.11951-1-benjamin.gaignard@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Allow to delete buffers on capture queue because it the one which own the decoded buffers. After a dynamic resolution change lot of them could remain allocated but won't be used anymore so deleting them save memory. Signed-off-by: Benjamin Gaignard --- drivers/media/platform/verisilicon/hantro_v4l2.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/media/platform/verisilicon/hantro_v4l2.c b/drivers/media/platform/verisilicon/hantro_v4l2.c index 941fa23c211a..34eab90e8a42 100644 --- a/drivers/media/platform/verisilicon/hantro_v4l2.c +++ b/drivers/media/platform/verisilicon/hantro_v4l2.c @@ -756,6 +756,7 @@ const struct v4l2_ioctl_ops hantro_ioctl_ops = { .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf, .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf, .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs, + .vidioc_delete_bufs = v4l2_m2m_ioctl_delete_bufs, .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,