From patchwork Thu Nov 9 16:29:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 743284 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 3FCB5C04E85 for ; Thu, 9 Nov 2023 16:33:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344205AbjKIQdB (ORCPT ); Thu, 9 Nov 2023 11:33:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59528 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343910AbjKIQcs (ORCPT ); Thu, 9 Nov 2023 11:32:48 -0500 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 CB45B35B3; Thu, 9 Nov 2023 08:32:42 -0800 (PST) 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 madras.collabora.co.uk (Postfix) with ESMTPSA id BAE5A66076A5; Thu, 9 Nov 2023 16:32:40 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1699547561; bh=g0dyF+ycz2GdAEZt3jkhDNKqpTl9v7x2nwR0T9Ed9qU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dnGRyHHBFBcoJtkPysfS8CcNJwtONeao9n9wsBmg1CjMFkkP14sUrMocf09SFyQUu EQ8KrcacKAcAjqR3fyqTYxVT/mI990/ZSITdQkcrd7Yuwv7m8nNo0QRFXmYmcWSZC1 R1sXdAmEh7lZtu2l8SKj4XhUKmo33uyh4Gq3BV3LqRGWywCbuwwMe8R3tdMuJ2O1UR 2ZaSKxtS0PwiTG6fNU50tGPUCspXOtAoR3UHvOjvl+0xqKvRnChtmI+TQCLbZjfCQa TUd8AySyWLr2Jn5Wvgz/oQjT6rUVnyCBh9MHJ/5Ijmm2jH5OgzvWla5Rpsgbtakixh ZdVZqx41etKkg== 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 v15 08/56] media: videobuf2: Use vb2_get_num_buffers() helper Date: Thu, 9 Nov 2023 17:29:20 +0100 Message-Id: <20231109163008.179152-9-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231109163008.179152-1-benjamin.gaignard@collabora.com> References: <20231109163008.179152-1-benjamin.gaignard@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Stop using queue num_buffers field directly, instead use vb2_get_num_buffers(). This prepares for the future 'delete buffers' feature where there are holes in the buffer indices. Signed-off-by: Benjamin Gaignard --- version 15: - Use vb2_get_num_buffers() in __vb2_perform_fileio() intead of testing bitmap bits. .../media/common/videobuf2/videobuf2-core.c | 94 ++++++++++--------- .../media/common/videobuf2/videobuf2-v4l2.c | 4 +- 2 files changed, 52 insertions(+), 46 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 0024b82663d4..ce5b84b9bcd4 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -449,13 +449,14 @@ 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]) { + unsigned int q_num_buffers = vb2_get_num_buffers(q); unsigned int buffer, plane; 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); + VB2_MAX_FRAME - q_num_buffers); for (buffer = 0; buffer < num_buffers; ++buffer) { /* Allocate vb2 buffer structures */ @@ -475,7 +476,7 @@ 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, q_num_buffers + buffer); call_void_bufop(q, init_buffer, vb); /* Allocate video buffer memory for the MMAP type */ @@ -519,8 +520,9 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers) { unsigned int buffer; struct vb2_buffer *vb; + unsigned int q_num_buffers = vb2_get_num_buffers(q); - for (buffer = q->num_buffers - buffers; buffer < q->num_buffers; + for (buffer = q_num_buffers - buffers; buffer < q_num_buffers; ++buffer) { vb = vb2_get_buffer(q, buffer); if (!vb) @@ -544,11 +546,12 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers) static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) { unsigned int buffer; + unsigned int q_num_buffers = vb2_get_num_buffers(q); 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; + for (buffer = q_num_buffers - buffers; buffer < q_num_buffers; ++buffer) { struct vb2_buffer *vb = vb2_get_buffer(q, buffer); @@ -564,7 +567,7 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) * 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 (q_num_buffers) { 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; @@ -590,7 +593,7 @@ 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 < q->num_buffers; ++buffer) { + for (buffer = 0; buffer < vb2_get_num_buffers(q); buffer++) { struct vb2_buffer *vb = vb2_get_buffer(q, buffer); bool unbalanced; @@ -642,7 +645,7 @@ 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; + for (buffer = q_num_buffers - buffers; buffer < q_num_buffers; ++buffer) { struct vb2_buffer *vb = vb2_get_buffer(q, buffer); @@ -654,7 +657,7 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) } q->num_buffers -= buffers; - if (!q->num_buffers) { + if (!vb2_get_num_buffers(q)) { q->memory = VB2_MEMORY_UNKNOWN; INIT_LIST_HEAD(&q->queued_list); } @@ -685,7 +688,7 @@ EXPORT_SYMBOL(vb2_buffer_in_use); static bool __buffers_in_use(struct vb2_queue *q) { unsigned int buffer; - for (buffer = 0; buffer < q->num_buffers; ++buffer) { + for (buffer = 0; buffer < vb2_get_num_buffers(q); ++buffer) { struct vb2_buffer *vb = vb2_get_buffer(q, buffer); if (!vb) @@ -811,6 +814,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, unsigned int flags, unsigned int *count) { unsigned int num_buffers, allocated_buffers, num_planes = 0; + 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; @@ -826,7 +830,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, return -EBUSY; } - if (*count == 0 || q->num_buffers != 0 || + if (*count == 0 || q_num_bufs != 0 || (q->memory != VB2_MEMORY_UNKNOWN && q->memory != memory) || !verify_coherency_flags(q, non_coherent_mem)) { /* @@ -844,7 +848,7 @@ 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_buffers); + __vb2_queue_free(q, q_num_bufs); mutex_unlock(&q->mmap_lock); /* @@ -939,7 +943,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, if (ret < 0) { /* * Note: __vb2_queue_free() will subtract 'allocated_buffers' - * from q->num_buffers and it will reset q->memory to + * from already queued buffers and it will reset q->memory to * VB2_MEMORY_UNKNOWN. */ __vb2_queue_free(q, allocated_buffers); @@ -973,10 +977,11 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, unsigned int num_planes = 0, num_buffers, allocated_buffers; unsigned plane_sizes[VB2_MAX_PLANES] = { }; bool non_coherent_mem = flags & V4L2_MEMORY_FLAG_NON_COHERENT; - bool no_previous_buffers = !q->num_buffers; - int ret; + unsigned int q_num_bufs = vb2_get_num_buffers(q); + bool no_previous_buffers = !q_num_bufs; + int ret = 0; - if (q->num_buffers == VB2_MAX_FRAME) { + if (q_num_bufs == VB2_MAX_FRAME) { dprintk(q, 1, "maximum number of buffers already allocated\n"); return -ENOBUFS; } @@ -1005,7 +1010,7 @@ 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, VB2_MAX_FRAME - q_num_bufs); if (requested_planes && requested_sizes) { num_planes = requested_planes; @@ -1037,7 +1042,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, num_buffers = allocated_buffers; /* - * q->num_buffers contains the total number of buffers, that the + * num_buffers contains the total number of buffers, that the * queue driver has set up */ ret = call_qop(q, queue_setup, q, &num_buffers, @@ -1058,7 +1063,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, if (ret < 0) { /* * Note: __vb2_queue_free() will subtract 'allocated_buffers' - * from q->num_buffers and it will reset q->memory to + * from already queued buffers and it will reset q->memory to * VB2_MEMORY_UNKNOWN. */ __vb2_queue_free(q, allocated_buffers); @@ -1675,7 +1680,7 @@ 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 < q->num_buffers; ++i) { + for (i = 0; i < vb2_get_num_buffers(q); ++i) { vb = vb2_get_buffer(q, i); if (!vb) @@ -2081,7 +2086,7 @@ 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 < q->num_buffers; ++i) { + for (i = 0; i < vb2_get_num_buffers(q); i++) { struct vb2_buffer *vb = vb2_get_buffer(q, i); if (!vb) @@ -2125,7 +2130,7 @@ 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 < q->num_buffers; ++i) { + for (i = 0; i < vb2_get_num_buffers(q); i++) { struct vb2_buffer *vb; struct media_request *req; @@ -2173,6 +2178,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q) int vb2_core_streamon(struct vb2_queue *q, unsigned int type) { + unsigned int q_num_bufs = vb2_get_num_buffers(q); int ret; if (type != q->type) { @@ -2185,12 +2191,12 @@ int vb2_core_streamon(struct vb2_queue *q, unsigned int type) return 0; } - if (!q->num_buffers) { + if (!q_num_bufs) { dprintk(q, 1, "no buffers have been allocated\n"); return -EINVAL; } - if (q->num_buffers < q->min_buffers_needed) { + if (q_num_bufs < q->min_buffers_needed) { dprintk(q, 1, "need at least %u allocated buffers\n", q->min_buffers_needed); return -EINVAL; @@ -2518,7 +2524,7 @@ 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, q->num_buffers); + __vb2_queue_free(q, vb2_get_num_buffers(q)); mutex_unlock(&q->mmap_lock); } EXPORT_SYMBOL_GPL(vb2_core_queue_release); @@ -2547,7 +2553,7 @@ __poll_t vb2_core_poll(struct vb2_queue *q, struct file *file, /* * Start file I/O emulator only if streaming API has not been used yet. */ - if (q->num_buffers == 0 && !vb2_fileio_is_active(q)) { + if (vb2_get_num_buffers(q) == 0 && !vb2_fileio_is_active(q)) { if (!q->is_output && (q->io_modes & VB2_READ) && (req_events & (EPOLLIN | EPOLLRDNORM))) { if (__vb2_init_fileio(q, 1)) @@ -2585,7 +2591,7 @@ __poll_t vb2_core_poll(struct vb2_queue *q, struct file *file, * For output streams you can call write() as long as there are fewer * buffers queued than there are buffers available. */ - if (q->is_output && q->fileio && q->queued_count < q->num_buffers) + if (q->is_output && q->fileio && q->queued_count < vb2_get_num_buffers(q)) return EPOLLOUT | EPOLLWRNORM; if (list_empty(&q->done_list)) { @@ -2634,8 +2640,8 @@ struct vb2_fileio_buf { * struct vb2_fileio_data - queue context used by file io emulator * * @cur_index: the index of the buffer currently being read from or - * written to. If equal to q->num_buffers then a new buffer - * must be dequeued. + * written to. If equal to number of buffers in the vb2_queue + * then a new buffer must be dequeued. * @initial_index: in the read() case all buffers are queued up immediately * in __vb2_init_fileio() and __vb2_perform_fileio() just cycles * buffers. However, in the write() case no buffers are initially @@ -2645,9 +2651,9 @@ struct vb2_fileio_buf { * buffers. This means that initially __vb2_perform_fileio() * needs to know what buffer index to use when it is queuing up * the buffers for the first time. That initial index is stored - * in this field. Once it is equal to q->num_buffers all - * available buffers have been queued and __vb2_perform_fileio() - * should start the normal dequeue/queue cycle. + * in this field. Once it is equal to number of buffers in the + * vb2_queue all available buffers have been queued and + * __vb2_perform_fileio() should start the normal dequeue/queue cycle. * * vb2 provides a compatibility layer and emulator of file io (read and * write) calls on top of streaming API. For proper operation it required @@ -2695,7 +2701,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) /* * Check if streaming api has not been already activated. */ - if (q->streaming || q->num_buffers > 0) + if (q->streaming || vb2_get_num_buffers(q) > 0) return -EBUSY; /* @@ -2745,7 +2751,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) /* * Get kernel address of each buffer. */ - for (i = 0; i < q->num_buffers; i++) { + for (i = 0; i < vb2_get_num_buffers(q); i++) { /* vb can never be NULL when using fileio. */ vb = vb2_get_buffer(q, i); @@ -2764,7 +2770,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) /* * Queue all buffers. */ - for (i = 0; i < q->num_buffers; i++) { + for (i = 0; i < vb2_get_num_buffers(q); i++) { struct vb2_buffer *vb2 = vb2_get_buffer(q, i); if (!vb2) @@ -2777,10 +2783,10 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) } /* * All buffers have been queued, so mark that by setting - * initial_index to q->num_buffers + * initial_index to the number of buffers in the vb2_queue */ - fileio->initial_index = q->num_buffers; - fileio->cur_index = q->num_buffers; + fileio->initial_index = vb2_get_num_buffers(q); + fileio->cur_index = fileio->initial_index; } /* @@ -2873,7 +2879,7 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_ * Check if we need to dequeue the buffer. */ index = fileio->cur_index; - if (index >= q->num_buffers) { + if (index >= vb2_get_num_buffers(q)) { struct vb2_buffer *b; /* @@ -2974,14 +2980,14 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_ * If we are queuing up buffers for the first time, then * increase initial_index by one. */ - if (fileio->initial_index < q->num_buffers) + if (fileio->initial_index < vb2_get_num_buffers(q)) fileio->initial_index++; /* * The next buffer to use is either a buffer that's going to be - * queued for the first time (initial_index < q->num_buffers) - * or it is equal to q->num_buffers, meaning that the next - * time we need to dequeue a buffer since we've now queued up - * all the 'first time' buffers. + * queued for the first time (initial_index < number of buffers in the vb2_queue) + * or it is equal to the number of buffers in the vb2_queue, + * meaning that the next time we need to dequeue a buffer since + * we've now queued up all the 'first time' buffers. */ fileio->cur_index = fileio->initial_index; } @@ -3026,7 +3032,7 @@ static int vb2_thread(void *data) int ret = 0; if (q->is_output) { - prequeue = q->num_buffers; + prequeue = vb2_get_num_buffers(q); copy_timestamp = q->copy_timestamp; } diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index 6ba13a95323c..9d3b828cc804 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -621,7 +621,7 @@ struct vb2_buffer *vb2_find_buffer(struct vb2_queue *q, u64 timestamp) * This loop doesn't scale if there is a really large number of buffers. * Maybe something more efficient will be needed in this case. */ - for (i = 0; i < q->num_buffers; i++) { + for (i = 0; i < vb2_get_num_buffers(q); i++) { vb2 = vb2_get_buffer(q, i); if (!vb2) @@ -755,7 +755,7 @@ int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create) fill_buf_caps(q, &create->capabilities); validate_memory_flags(q, create->memory, &create->flags); - create->index = q->num_buffers; + create->index = vb2_get_num_buffers(q); if (create->count == 0) return ret != -EBUSY ? ret : 0;