From patchwork Wed Jul 5 12:10:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 13302110 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3CE42C0015E for ; Wed, 5 Jul 2023 12:11:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=JBagmau/2xEJCpME8IgMg/QnYPDGbs2TDGrCPX3Vyxk=; b=b2KVC8A1al18aVHZd7na44tARj s2gKf1mfENtAh0KLS+0uAhCDyeqx6ElJ3Hxw8j/IhohF0tvHPV015ARLFTbnwNqO5lnOZZC/U7AX0 osVu71yWDjgn+qa17Tqs1NdXxGJO5Dd1XuTUdQI0sLSLF2x5dlM/LadB1ubkwMWkzuvtopAVLzOuh z5Y2iVKLm8dQejBaRzxflV8Y1AQaaPgILRYiG2n2b0N6I/j5jub/ihTTVuVTj22TfjSrXZIdC8i5Z XivtzECzaXuOIV5gU8HccO7wa2/gxDJFRMchHUU0kbX06iQrQ3Gpf7hs7aIgRlUzWzkLCXURz8Wji PtM97EFg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qH1Lq-00Fpaq-36; Wed, 05 Jul 2023 12:11:18 +0000 Received: from madras.collabora.co.uk ([2a00:1098:0:82:1000:25:2eeb:e5ab]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qH1Lj-00FpSS-0V; Wed, 05 Jul 2023 12:11:13 +0000 Received: from benjamin-XPS-13-9310.. (unknown [IPv6:2a01:e0a:120:3210:cbfb:e358:222c:d8c1]) (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 494256606FB0; Wed, 5 Jul 2023 13:11:04 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1688559064; bh=KRDWgSGJLJJkZ4YtMc9THdOTvbmNUOepA0+ihzaVNOw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZcMU1y9EUXHri9xNIMVSQgGfsIxsb4k9NexSZvNAzIxyrv92JPCztdcNThKs+rPTD yE9dBa4VclSkMCl72vxAU6gGnMBfjj/moi3iDAkxiu6fJqvNlt5tpyQKIJlTx725SB 697NDE9taZcN72QTr4rAutJ7efLEGPDIALQSWYuL0mY9mspeUKGzpu0sAL01a6DPP9 Ix3jBJKvB2vwaARdqD/OYAe8aKbv8lD02on7+e8sE+yLZZemPUYAZXfxDtyEON+bjJ 7pjP8kTY4uP3+Nov0Rq8yTDL0yxucgyqc243/SB41KjcwqfwETylY1h3hgd+lP0HR+ W9YAVLFvYswtw== From: Benjamin Gaignard To: mchehab@kernel.org, tfiga@chromium.org, m.szyprowski@samsung.com, ming.qian@nxp.com, ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de, gregkh@linuxfoundation.org, hverkuil-cisco@xs4all.nl, nicolas.dufresne@collabora.com 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, linux-staging@lists.linux.dev, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v4 02/10] media: videobuf2: Be more flexible on the number of queue stored buffers Date: Wed, 5 Jul 2023 14:10:48 +0200 Message-Id: <20230705121056.37017-3-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230705121056.37017-1-benjamin.gaignard@collabora.com> References: <20230705121056.37017-1-benjamin.gaignard@collabora.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230705_051111_466113_9A0FDFF4 X-CRM114-Status: GOOD ( 16.88 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Add 'max_allowed_buffers' field in vb2_queue struct to let drivers decide how many buffers could be stored in a queue. This request 'bufs' array to be allocated at queue init time and freed when releasing the queue. By default VB2_MAX_FRAME remains the limit. Signed-off-by: Benjamin Gaignard --- version 4: - no Xarray here but instead a new field to let queues decide of their own maximum. .../media/common/videobuf2/videobuf2-core.c | 22 ++++++++++++------- include/media/videobuf2-core.h | 4 +++- 2 files changed, 17 insertions(+), 9 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 42fd3984c2bc..77e69b01d88d 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -413,7 +413,7 @@ static void init_buffer_cache_hints(struct vb2_queue *q, struct vb2_buffer *vb) */ static bool vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb, int index) { - if (index < VB2_MAX_FRAME && !q->bufs[index]) { + if (index < q->max_allowed_buffers && !q->bufs[index]) { q->bufs[index] = vb; vb->index = index; vb->vb2_queue = q; @@ -430,7 +430,7 @@ static bool vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb, int */ static void vb2_queue_remove_buffer(struct vb2_queue *q, struct vb2_buffer *vb) { - if (vb->index < VB2_MAX_FRAME) { + if (vb->index < q->max_allowed_buffers) { q->bufs[vb->index] = NULL; vb->vb2_queue = NULL; } @@ -451,9 +451,9 @@ 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 */ + /* Ensure that q->num_buffers+num_buffers is below q->max_allowed_buffers */ num_buffers = min_t(unsigned int, num_buffers, - VB2_MAX_FRAME - q->num_buffers); + q->max_allowed_buffers - q->num_buffers); for (buffer = 0; buffer < num_buffers; ++buffer) { /* Allocate vb2 buffer structures */ @@ -854,9 +854,9 @@ 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); + WARN_ON(q->min_buffers_needed > q->max_allowed_buffers); num_buffers = max_t(unsigned int, *count, q->min_buffers_needed); - num_buffers = min_t(unsigned int, num_buffers, VB2_MAX_FRAME); + num_buffers = min_t(unsigned int, num_buffers, q->max_allowed_buffers); memset(q->alloc_devs, 0, sizeof(q->alloc_devs)); /* * Set this now to ensure that drivers see the correct q->memory value @@ -972,7 +972,7 @@ 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) { + if (q->num_buffers == q->max_allowed_buffers) { dprintk(q, 1, "maximum number of buffers already allocated\n"); return -ENOBUFS; } @@ -1001,7 +1001,7 @@ 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 = min(*count, q->max_allowed_buffers - q->num_buffers); if (requested_planes && requested_sizes) { num_planes = requested_planes; @@ -2549,6 +2549,11 @@ int vb2_core_queue_init(struct vb2_queue *q) q->memory = VB2_MEMORY_UNKNOWN; + if (!q->max_allowed_buffers) + q->max_allowed_buffers = VB2_MAX_FRAME; + + q->bufs = kcalloc(q->max_allowed_buffers, sizeof(*q->bufs), GFP_KERNEL); + if (q->buf_struct_size == 0) q->buf_struct_size = sizeof(struct vb2_buffer); @@ -2573,6 +2578,7 @@ void vb2_core_queue_release(struct vb2_queue *q) __vb2_queue_cancel(q); mutex_lock(&q->mmap_lock); __vb2_queue_free(q, q->num_buffers); + kfree(q->bufs); 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 4b6a9d2ea372..ee9161b9fd64 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -558,6 +558,7 @@ struct vb2_buf_ops { * @dma_dir: DMA mapping direction. * @bufs: videobuf2 buffer structures * @num_buffers: number of allocated/used buffers + * @max_allowed_buffers: upper limit of number of allocated/used buffers * @queued_list: list of buffers currently queued from userspace * @queued_count: number of buffers queued and ready for streaming. * @owned_by_drv_count: number of buffers owned by the driver @@ -619,8 +620,9 @@ struct vb2_queue { struct mutex mmap_lock; unsigned int memory; enum dma_data_direction dma_dir; - struct vb2_buffer *bufs[VB2_MAX_FRAME]; + struct vb2_buffer **bufs; unsigned int num_buffers; + unsigned int max_allowed_buffers; struct list_head queued_list; unsigned int queued_count;