From patchwork Tue Jul 27 07:05:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Senozhatsky X-Patchwork-Id: 12401899 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76926C4338F for ; Tue, 27 Jul 2021 07:05:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 61BCA61053 for ; Tue, 27 Jul 2021 07:05:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235822AbhG0HFz (ORCPT ); Tue, 27 Jul 2021 03:05:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235800AbhG0HFw (ORCPT ); Tue, 27 Jul 2021 03:05:52 -0400 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 977C5C061760 for ; Tue, 27 Jul 2021 00:05:52 -0700 (PDT) Received: by mail-pl1-x633.google.com with SMTP id t21so14583546plr.13 for ; Tue, 27 Jul 2021 00:05:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=41CQMiT5nV5R84K+9BXlz17KCRyuWZjAoTZXKVqQA5Q=; b=RVfHApaycgivMU2fVDheJOiz2IEtmlBD28ankYifKI8oncBWm4vnfD6YAYlkCi5d6s xStbGSRJvtqOAG9fd2K3QOTjddeKv45cd3xQPKNVdZNYQ3dIDdazAbxf0+pyfs6wpyFl tesaz3U90RRmk6aAy4Drn95RKAExvxVPAhSbo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=41CQMiT5nV5R84K+9BXlz17KCRyuWZjAoTZXKVqQA5Q=; b=Uo53V9qerZ1gOoEW2ehTR4R4FqQ5ML3BTsFDFHtClGLjS9amvvCNRna2u5wSBtUJ71 zTHmFG1ArUaLhRCHvran+DEgjgnefKN9dLBozUzIt0L+cQAg89BI4dX6SXBBxjap8Dt3 b+nE/UNdcDrGyNC6zVCVIzfTbWeRNVaf8IP1HJ9Ht8SvxxQ5vfpdCS4kwIXmg8e+upjY zQXdjJ7pGfIuJgJoBafao5TK4UVCG7pjzHB7LYpTNvk/oLOQWvo9B8OS7vgAwILpVQjB rrFG+aeYpNBsIQhMSXe7Ak+7k0F/AceQSHpsOliR+eSYWizufAVrBeTuv6ZqtUbURDXS RPhg== X-Gm-Message-State: AOAM531eVtItyfb672OJ0pH057XumP059wlRYFv4HinW5cSXA3gIfLM5 Hea+rRKQGcGY6Q/I+uFMjh7vRA== X-Google-Smtp-Source: ABdhPJw0ZderebaFNfkLQTqiHybR9TEDHVXkSUymzXCal9NIokbt+MVntKdUerZFaBld2uzf5BwItg== X-Received: by 2002:a17:90a:de11:: with SMTP id m17mr20374199pjv.5.1627369552035; Tue, 27 Jul 2021 00:05:52 -0700 (PDT) Received: from senozhatsky.flets-east.jp ([2409:10:2e40:5100:ba3e:509b:495:ec84]) by smtp.gmail.com with ESMTPSA id 30sm2343447pgq.31.2021.07.27.00.05.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jul 2021 00:05:51 -0700 (PDT) From: Sergey Senozhatsky To: Tomasz Figa , Hans Verkuil Cc: Dafna Hirschfeld , Ricardo Ribalda , Christoph Hellwig , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky Subject: [PATCHv4 6/8] videobuf2: add queue memory coherency parameter Date: Tue, 27 Jul 2021 16:05:15 +0900 Message-Id: <20210727070517.443167-7-senozhatsky@chromium.org> X-Mailer: git-send-email 2.32.0.432.gabb21c7263-goog In-Reply-To: <20210727070517.443167-1-senozhatsky@chromium.org> References: <20210727070517.443167-1-senozhatsky@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Preparations for future V4L2_MEMORY_FLAG_NON_COHERENT support. Extend vb2_core_reqbufs() parameters list to accept requests' ->flags, which will be used for memory coherency configuration. An attempt to allocate a buffer with coherency requirements which don't match queue's consistency model will fail. Signed-off-by: Sergey Senozhatsky --- .../media/common/videobuf2/videobuf2-core.c | 38 ++++++++++++++++--- .../media/common/videobuf2/videobuf2-v4l2.c | 5 ++- drivers/media/dvb-core/dvb_vb2.c | 2 +- include/media/videobuf2-core.h | 10 ++++- 4 files changed, 44 insertions(+), 11 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 55af63d54f23..af4db310cf5e 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -738,11 +738,31 @@ int vb2_verify_memory_type(struct vb2_queue *q, } EXPORT_SYMBOL(vb2_verify_memory_type); +static void set_queue_coherency(struct vb2_queue *q, bool coherent_mem) +{ + q->coherent_mem = 1; + + if (!vb2_queue_allows_cache_hints(q)) + return; + if (!coherent_mem) + q->coherent_mem = 0; +} + +static bool verify_coherency_flags(struct vb2_queue *q, bool coherent_mem) +{ + if (coherent_mem != q->coherent_mem) { + dprintk(q, 1, "memory coherency model mismatch\n"); + return false; + } + return true; +} + int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, - unsigned int *count) + unsigned int flags, unsigned int *count) { unsigned int num_buffers, allocated_buffers, num_planes = 0; unsigned plane_sizes[VB2_MAX_PLANES] = { }; + bool coherent_mem = true; unsigned int i; int ret; @@ -757,7 +777,8 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, } if (*count == 0 || q->num_buffers != 0 || - (q->memory != VB2_MEMORY_UNKNOWN && q->memory != memory)) { + (q->memory != VB2_MEMORY_UNKNOWN && q->memory != memory) || + !verify_coherency_flags(q, coherent_mem)) { /* * We already have buffers allocated, so first check if they * are not in use and can be freed. @@ -794,6 +815,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, num_buffers = min_t(unsigned int, num_buffers, VB2_MAX_FRAME); memset(q->alloc_devs, 0, sizeof(q->alloc_devs)); q->memory = memory; + set_queue_coherency(q, coherent_mem); /* * Ask the driver how many buffers and planes per buffer it requires. @@ -878,12 +900,13 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, EXPORT_SYMBOL_GPL(vb2_core_reqbufs); int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, - unsigned int *count, + unsigned int flags, unsigned int *count, unsigned int requested_planes, const unsigned int requested_sizes[]) { unsigned int num_planes = 0, num_buffers, allocated_buffers; unsigned plane_sizes[VB2_MAX_PLANES] = { }; + bool coherent_mem = true; int ret; if (q->num_buffers == VB2_MAX_FRAME) { @@ -899,11 +922,14 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, memset(q->alloc_devs, 0, sizeof(q->alloc_devs)); q->memory = memory; q->waiting_for_buffers = !q->is_output; + set_queue_coherency(q, coherent_mem); } else { if (q->memory != memory) { dprintk(q, 1, "memory model mismatch\n"); return -EINVAL; } + if (!verify_coherency_flags(q, coherent_mem)) + return -EINVAL; } num_buffers = min(*count, VB2_MAX_FRAME - q->num_buffers); @@ -2576,7 +2602,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) fileio->memory = VB2_MEMORY_MMAP; fileio->type = q->type; q->fileio = fileio; - ret = vb2_core_reqbufs(q, fileio->memory, &fileio->count); + ret = vb2_core_reqbufs(q, fileio->memory, 0, &fileio->count); if (ret) goto err_kfree; @@ -2633,7 +2659,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) err_reqbufs: fileio->count = 0; - vb2_core_reqbufs(q, fileio->memory, &fileio->count); + vb2_core_reqbufs(q, fileio->memory, 0, &fileio->count); err_kfree: q->fileio = NULL; @@ -2653,7 +2679,7 @@ static int __vb2_cleanup_fileio(struct vb2_queue *q) vb2_core_streamoff(q, q->type); q->fileio = NULL; fileio->count = 0; - vb2_core_reqbufs(q, fileio->memory, &fileio->count); + vb2_core_reqbufs(q, fileio->memory, 0, &fileio->count); kfree(fileio); dprintk(q, 3, "file io emulator closed\n"); } diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index 2fbae9bd7b52..b4f70ddb09b0 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -697,7 +697,7 @@ int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req) int ret = vb2_verify_memory_type(q, req->memory, req->type); fill_buf_caps(q, &req->capabilities); - return ret ? ret : vb2_core_reqbufs(q, req->memory, &req->count); + return ret ? ret : vb2_core_reqbufs(q, req->memory, 0, &req->count); } EXPORT_SYMBOL_GPL(vb2_reqbufs); @@ -772,6 +772,7 @@ int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create) if (requested_sizes[i] == 0) return -EINVAL; return ret ? ret : vb2_core_create_bufs(q, create->memory, + 0, &create->count, requested_planes, requested_sizes); @@ -974,7 +975,7 @@ int vb2_ioctl_reqbufs(struct file *file, void *priv, return res; if (vb2_queue_is_busy(vdev, file)) return -EBUSY; - res = vb2_core_reqbufs(vdev->queue, p->memory, &p->count); + res = vb2_core_reqbufs(vdev->queue, p->memory, 0, &p->count); /* If count == 0, then the owner has released all buffers and he is no longer owner of the queue. Otherwise we have a new owner. */ if (res == 0) diff --git a/drivers/media/dvb-core/dvb_vb2.c b/drivers/media/dvb-core/dvb_vb2.c index 6974f1731529..959d110407a4 100644 --- a/drivers/media/dvb-core/dvb_vb2.c +++ b/drivers/media/dvb-core/dvb_vb2.c @@ -342,7 +342,7 @@ int dvb_vb2_reqbufs(struct dvb_vb2_ctx *ctx, struct dmx_requestbuffers *req) ctx->buf_siz = req->size; ctx->buf_cnt = req->count; - ret = vb2_core_reqbufs(&ctx->vb_q, VB2_MEMORY_MMAP, &req->count); + ret = vb2_core_reqbufs(&ctx->vb_q, VB2_MEMORY_MMAP, 0, &req->count); if (ret) { ctx->state = DVB_VB2_STATE_NONE; dprintk(1, "[%s] count=%d size=%d errno=%d\n", ctx->name, diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 66e548268242..7e748cd09b7a 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -504,6 +504,8 @@ struct vb2_buf_ops { * @allow_cache_hints: when set user-space can pass cache management hints in * order to skip cache flush/invalidation on ->prepare() or/and * ->finish(). + * @coherent_mem: when cleared queue will attempt to allocate buffers using + * non-coherent memory. * @lock: pointer to a mutex that protects the &struct vb2_queue. The * driver can set this to a mutex to let the v4l2 core serialize * the queuing ioctls. If the driver wants to handle locking @@ -583,6 +585,7 @@ struct vb2_queue { unsigned int uses_qbuf:1; unsigned int uses_requests:1; unsigned int allow_cache_hints:1; + unsigned int coherent_mem:1; struct mutex *lock; void *owner; @@ -748,6 +751,8 @@ void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb); * vb2_core_reqbufs() - Initiate streaming. * @q: pointer to &struct vb2_queue with videobuf2 queue. * @memory: memory type, as defined by &enum vb2_memory. + * @flags: auxiliary queue/buffer management flags. Currently, the only + * used flag is %V4L2_MEMORY_FLAG_NON_COHERENT. * @count: requested buffer count. * * Videobuf2 core helper to implement VIDIOC_REQBUF() operation. It is called @@ -772,12 +777,13 @@ void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb); * Return: returns zero on success; an error code otherwise. */ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, - unsigned int *count); + unsigned int flags, unsigned int *count); /** * vb2_core_create_bufs() - Allocate buffers and any required auxiliary structs * @q: pointer to &struct vb2_queue with videobuf2 queue. * @memory: memory type, as defined by &enum vb2_memory. + * @flags: auxiliary queue/buffer management flags. * @count: requested buffer count. * @requested_planes: number of planes requested. * @requested_sizes: array with the size of the planes. @@ -795,7 +801,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, * Return: returns zero on success; an error code otherwise. */ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, - unsigned int *count, + unsigned int flags, unsigned int *count, unsigned int requested_planes, const unsigned int requested_sizes[]);