From patchwork Fri Sep 1 12:44:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 719652 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 AA2D6CA0FF1 for ; Fri, 1 Sep 2023 12:44:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349581AbjIAMoo (ORCPT ); Fri, 1 Sep 2023 08:44:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44740 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349537AbjIAMoi (ORCPT ); Fri, 1 Sep 2023 08:44:38 -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 5DE7FE7E; Fri, 1 Sep 2023 05:44:32 -0700 (PDT) Received: from benjamin-XPS-13-9310.. (unknown [IPv6:2a01:e0a:120:3210:4d01:31d2:de6b:d217]) (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 AE66D66072DF; Fri, 1 Sep 2023 13:44:30 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693572271; bh=MiMnbFE71L+BCEMn0pS8hNXpgTCIRcqjkcLcDKMoGu0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CHThqFpd8P5fZbPKgJSj2KLSd4/98ZUrBTB12EJBsoyDPF9ytAuWVuMQFUb8shQXG 4rxeMHElJrt7mgxhOXGL2dV0eU5jx27QIuKaCgOjncPvWAG5tvVxdgYbAKt2Gt4Agx P+OXnaRPJmNG1Cb9oIKO7gCJaXqvcxIwAOjzNtiI8hQGlhXJb+huStZ7eZGbFN1UFy va04HKy7RStMJijVdJZyo7QlXy4gTR3p/ENFhQ2n7jb9t3KPan8nWLdDbFFcmNFHTG uMA+wLTS/tTK+0vkWclHj/Y11YI5FB3rIF5ljp2GSXKEgmx4nJdNEbPOLE0oWygdUE zBKLJmnyVi1Cw== 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 v6 11/18] media: videobuf2: Be more flexible on the number of queue stored buffers Date: Fri, 1 Sep 2023 14:44:07 +0200 Message-Id: <20230901124414.48497-12-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230901124414.48497-1-benjamin.gaignard@collabora.com> References: <20230901124414.48497-1-benjamin.gaignard@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.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 Signed-off-by: Hans Verkuil Signed-off-by: Hans Verkuil --- .../media/common/videobuf2/videobuf2-core.c | 25 +++++++++++++------ include/media/videobuf2-core.h | 4 ++- 2 files changed, 20 insertions(+), 9 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 15b583ce0c69..dc7f6b59d237 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -411,7 +411,7 @@ 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, unsigned 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; @@ -428,7 +428,7 @@ static bool vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb, uns */ 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; } @@ -449,9 +449,9 @@ 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 */ @@ -862,9 +862,9 @@ 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 @@ -980,7 +980,7 @@ 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; } @@ -1009,7 +1009,7 @@ 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; @@ -2519,6 +2519,14 @@ 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; + + /* The maximum is limited by offset cookie encoding pattern */ + q->max_allowed_buffers = min_t(unsigned int, q->max_allowed_buffers, BUFFER_INDEX_MASK); + + 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); @@ -2543,6 +2551,7 @@ 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 cd3ff1cd759d..97153c69583f 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;