From patchwork Mon Mar 13 13:59:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 662889 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2D11C7618B for ; Mon, 13 Mar 2023 14:00:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229999AbjCMOAK (ORCPT ); Mon, 13 Mar 2023 10:00:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231139AbjCMN7v (ORCPT ); Mon, 13 Mar 2023 09:59:51 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8CEDA42BE3; Mon, 13 Mar 2023 06:59:27 -0700 (PDT) Received: from benjamin-XPS-13-9310.. (unknown [IPv6:2a01:e0a:120:3210:7a7b:d0cc:67e9:4297]) (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 madras.collabora.co.uk (Postfix) with ESMTPSA id 9B626660309C; Mon, 13 Mar 2023 13:59:25 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1678715966; bh=fqWhcs4/GgMdLp8whmAet1ILuF0Z1TgMuHnhZmsdzWU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=B/nUDWbvXGP1nhnuaY+/zpVS6ko+1IReLDTzh5bY6HAcciS+Cu82iJBYTKbLCCIJY Hl1gU1LyLOMdzaoIrAk1TuOZ2jmuuUgDqhQUeC4HjjujeJEWK3GRMM6zmsK7N3H0+u DAY0qmXucvqPN0G0PDuRJ8iVmx4nvAiprZgDVG8BPEzmgE1VetFkbzjnFMOh50G1Vf 9mLFlURp50N6ZN/OompkgTF13b87ywg+2kEt1dTRrWuGvi5hOUrhFoq8KccgnUzr6O OnmnuA9VSsG2ERu0Lgft+2gFEKy7IcTqRwTPgm9HiwL0omwDjsfkx30ySiNGGyEk5d kowrlfWWytOuQ== From: Benjamin Gaignard To: tfiga@chromium.org, m.szyprowski@samsung.com, mchehab@kernel.org, ming.qian@nxp.com, shijie.qin@nxp.com, eagle.zhou@nxp.com, bin.liu@mediatek.com, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, tiffany.lin@mediatek.com, andrew-ct.chen@mediatek.com, yunfei.dong@mediatek.com, stanimir.k.varbanov@gmail.com, quic_vgarodia@quicinc.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de, daniel.almeida@collabora.com, hverkuil-cisco@xs4all.nl, laurent.pinchart@ideasonboard.com, jerbel@kernel.org Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-rockchip@lists.infradead.org, kernel@collabora.com, Benjamin Gaignard Subject: [RFC 2/4] media: videobuf2: Replace bufs array by a list Date: Mon, 13 Mar 2023 14:59:14 +0100 Message-Id: <20230313135916.862852-3-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230313135916.862852-1-benjamin.gaignard@collabora.com> References: <20230313135916.862852-1-benjamin.gaignard@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Replacing bufs array by a list allows to remove the 32 buffers limit per queue. Signed-off-by: Benjamin Gaignard --- .../media/common/videobuf2/videobuf2-core.c | 14 ++------------ include/media/videobuf2-core.h | 19 +++++++++++++------ 2 files changed, 15 insertions(+), 18 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index b51152ace763..96597d339a07 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -412,10 +412,6 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, struct vb2_buffer *vb; int ret; - /* Ensure that q->num_buffers+num_buffers is below VB2_MAX_FRAME */ - num_buffers = min_t(unsigned int, num_buffers, - VB2_MAX_FRAME - q->num_buffers); - for (buffer = 0; buffer < num_buffers; ++buffer) { /* Allocate vb2 buffer structures */ vb = kzalloc(q->buf_struct_size, GFP_KERNEL); @@ -797,9 +793,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, /* * Make sure the requested values and current defaults are sane. */ - WARN_ON(q->min_buffers_needed > VB2_MAX_FRAME); num_buffers = max_t(unsigned int, *count, q->min_buffers_needed); - num_buffers = min_t(unsigned int, num_buffers, VB2_MAX_FRAME); memset(q->alloc_devs, 0, sizeof(q->alloc_devs)); /* * Set this now to ensure that drivers see the correct q->memory value @@ -915,11 +909,6 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, bool no_previous_buffers = !q->num_buffers; int ret; - if (q->num_buffers == VB2_MAX_FRAME) { - dprintk(q, 1, "maximum number of buffers already allocated\n"); - return -ENOBUFS; - } - if (no_previous_buffers) { if (q->waiting_in_dqbuf && *count) { dprintk(q, 1, "another dup()ped fd is waiting for a buffer\n"); @@ -944,7 +933,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, return -EINVAL; } - num_buffers = min(*count, VB2_MAX_FRAME - q->num_buffers); + num_buffers = *count; if (requested_planes && requested_sizes) { num_planes = requested_planes; @@ -2444,6 +2433,7 @@ int vb2_core_queue_init(struct vb2_queue *q) INIT_LIST_HEAD(&q->queued_list); INIT_LIST_HEAD(&q->done_list); + INIT_LIST_HEAD(&q->allocated_bufs); spin_lock_init(&q->done_lock); mutex_init(&q->mmap_lock); init_waitqueue_head(&q->done_wq); diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index d18c57e7aef0..47f1f35eb9cb 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -276,6 +276,8 @@ struct vb2_buffer { * done_entry: entry on the list that stores all buffers ready * to be dequeued to userspace * vb2_plane: per-plane information; do not change + * allocated_entry: entry on the list that stores all buffers allocated + * for the queue. */ enum vb2_buffer_state state; unsigned int synced:1; @@ -287,6 +289,7 @@ struct vb2_buffer { struct vb2_plane planes[VB2_MAX_PLANES]; struct list_head queued_entry; struct list_head done_entry; + struct list_head allocated_entry; #ifdef CONFIG_VIDEO_ADV_DEBUG /* * Counters for how often these buffer-related ops are @@ -556,7 +559,7 @@ 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 + * @allocated_bufs: list of buffer allocated for the queue. * @num_buffers: number of allocated/used buffers * @queued_list: list of buffers currently queued from userspace * @queued_count: number of buffers queued and ready for streaming. @@ -619,7 +622,7 @@ struct vb2_queue { struct mutex mmap_lock; unsigned int memory; enum dma_data_direction dma_dir; - struct vb2_buffer *bufs[VB2_MAX_FRAME]; + struct list_head allocated_bufs; unsigned int num_buffers; struct list_head queued_list; @@ -1239,8 +1242,12 @@ static inline void vb2_clear_last_buffer_dequeued(struct vb2_queue *q) static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q, unsigned int index) { - if (index < q->num_buffers) - return q->bufs[index]; + struct vb2_buffer *vb; + + list_for_each_entry(vb, &q->allocated_bufs, allocated_entry) + if (vb->index == index) + return vb; + return NULL; } @@ -1251,7 +1258,7 @@ static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q, */ static inline void vb2_set_buffer(struct vb2_queue *q, struct vb2_buffer *vb) { - q->bufs[vb->index] = vb; + list_add_tail(&vb->allocated_entry, &q->allocated_bufs); } /** @@ -1261,7 +1268,7 @@ static inline void vb2_set_buffer(struct vb2_queue *q, struct vb2_buffer *vb) */ static inline void vb2_del_buffer(struct vb2_queue *q, struct vb2_buffer *vb) { - q->bufs[vb->index] = NULL; + list_del(&vb->allocated_entry); } /*