From patchwork Wed Aug 14 02:06:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunke Cao X-Patchwork-Id: 13762739 Received: from mail-pg1-f175.google.com (mail-pg1-f175.google.com [209.85.215.175]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B8F3182B9 for ; Wed, 14 Aug 2024 02:06:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.175 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723601219; cv=none; b=m9ax3ws19ydF/ikoMBdYknzm2EA3XpvzhX9WtRoogExW9G6RXKAu+dFwzsoD3MropJ5IH/zaISCNdkcOtY3+SqnD9lWqwNFoICANAbTdYV5FuRGbIiSmTftwD2lxsapCXs6tZnHPaLmER7cuVtpfKQ8x6gYI8oBLAC584on8c30= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723601219; c=relaxed/simple; bh=MHivubr+aSfdTDoAx9G+VE8FPPqxd+dMJCQilgPia9A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PcwYDnaaOb15PN1HJniL32YOfSbF5JgGhJFBpG+nzrIC5kMTuEIGnNX7ubPnxlfhaAhm1GZWp/0PQDtxUsGaakQx9ZBIHZX2WxUVDEHPB2Vt+BUFaJtCN0F8ACn3sceHgXu+NJXQir7YCoxBHT38KG+sDLolj6T8k60eV6RoeZU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=S1l/ri05; arc=none smtp.client-ip=209.85.215.175 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="S1l/ri05" Received: by mail-pg1-f175.google.com with SMTP id 41be03b00d2f7-7a115c427f1so4057008a12.0 for ; Tue, 13 Aug 2024 19:06:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1723601216; x=1724206016; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=gqSR9lUPhshSAqptcvIC1X38m1fnyWXPJXD2Hh6SXwg=; b=S1l/ri05zISZDJGtoHs2BlB3SaX4PX3pOEwHwz222myQQhwfG3zPhn/v9Jo4i0mTJI WpBhLNWKvZ5ZgDv67neTKI3vTsLjujgO4BX+oovflFCvP4DEuhJWgYwhe+97emr9SsxS 7fTA4gO20EE/lHqfcE29xSaUEMNdcLNO5DUcg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723601216; x=1724206016; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=gqSR9lUPhshSAqptcvIC1X38m1fnyWXPJXD2Hh6SXwg=; b=mDxBtmfD3mYoBB0KeQxtil5lAZQb3OV8BKoVZ2WR7WR1de6FjnEjQrMggD2wP2g/TB ZyFJZQZnz+Gb6P5NJG0qdYQ0FkDZLWqLy7sN8qZPo4sPrT4S5H9L3Ec2fkPXITyV6aDC aFJcI1vBufTEYEQxqadyBm+Ca7y1G8HKNpr6ZKUQg3Wp+I3XvLh13OsfqgbakUYnxpOl T1ksJ0okH6ZkPA025WJRrhApAtGT9oZ+SgjezG1JHUzWnzxtmb44sI5MuR+xIGhaM2WL R1BO98Id+/ZL6Z5GPrA2JrAZrmcJQtKF4qcSVI8Pei4IavC7YrEIshBsRIf1ZraH6wlJ Lvug== X-Gm-Message-State: AOJu0Yw0TPrlqCi51qxqXLIVHorGN+YvE8ZvvdtGGFA6ncgFzwNGFhq4 sCvz5Cn77G+5r4cc9BgNwryeij50hjUutvrl6JgYhYZTKJI3VMU5ghpwUQJj1w== X-Google-Smtp-Source: AGHT+IGDKtYIcxHkPm11eZ2ZMO94UifhkPiMwSygfHWqPNpvh9HGHPVTJ43n3/gL3mD58NV6RjmFJg== X-Received: by 2002:a05:6a20:438e:b0:1c6:a825:8bc1 with SMTP id adf61e73a8af0-1c8eae97e97mr2189401637.29.1723601216392; Tue, 13 Aug 2024 19:06:56 -0700 (PDT) Received: from yunkec1.tok.corp.google.com ([2401:fa00:8f:203:269a:7c5:e4f2:518c]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2d3ac7d65b1sm303064a91.4.2024.08.13.19.06.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Aug 2024 19:06:55 -0700 (PDT) From: Yunke Cao To: Tomasz Figa , Marek Szyprowski , Mauro Carvalho Chehab , Hans Verkuil Cc: linux-media@vger.kernel.org, Yunke Cao Subject: [PATCH v5 2/4] media: videobuf2-core: release all planes first in __prepare_dmabuf() Date: Wed, 14 Aug 2024 11:06:41 +0900 Message-ID: <20240814020643.2229637-3-yunkec@chromium.org> X-Mailer: git-send-email 2.46.0.184.g6999bdac58-goog In-Reply-To: <20240814020643.2229637-1-yunkec@chromium.org> References: <20240814020643.2229637-1-yunkec@chromium.org> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In the existing implementation, validating planes, checking if the planes changed, releasing previous planes and reaquiring new planes all happens in the same for loop. Split the for loop into 3 parts 1. In the first for loop, validate planes and check if planes changed. 2. Call __vb2_buf_dmabuf_put() to release all planes. 3. In the second for loop, reaquire new planes. Signed-off-by: Yunke Cao Acked-by: Tomasz Figa --- v3: - Applied Tomasz's review comment: - Rename err_put_dbuf as err_put_planes. - Move code that only executed once into if (reacquired) to simply it. - In error handling, only call dma_buf_put() for valid pointers. --- .../media/common/videobuf2/videobuf2-core.c | 115 +++++++++--------- 1 file changed, 59 insertions(+), 56 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 4d232b08f950..b53d94659e30 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -1387,11 +1387,13 @@ static int __prepare_dmabuf(struct vb2_buffer *vb) for (plane = 0; plane < vb->num_planes; ++plane) { struct dma_buf *dbuf = dma_buf_get(planes[plane].m.fd); + planes[plane].dbuf = dbuf; + if (IS_ERR_OR_NULL(dbuf)) { dprintk(q, 1, "invalid dmabuf fd for plane %d\n", plane); ret = -EINVAL; - goto err; + goto err_put_planes; } /* use DMABUF size if length is not provided */ @@ -1402,76 +1404,68 @@ static int __prepare_dmabuf(struct vb2_buffer *vb) dprintk(q, 1, "invalid dmabuf length %u for plane %d, minimum length %u\n", planes[plane].length, plane, vb->planes[plane].min_length); - dma_buf_put(dbuf); ret = -EINVAL; - goto err; + goto err_put_planes; } /* Skip the plane if already verified */ if (dbuf == vb->planes[plane].dbuf && - vb->planes[plane].length == planes[plane].length) { - dma_buf_put(dbuf); + vb->planes[plane].length == planes[plane].length) continue; - } dprintk(q, 3, "buffer for plane %d changed\n", plane); - if (!reacquired) { - reacquired = true; + reacquired = true; + } + + if (reacquired) { + if (vb->planes[0].mem_priv) { vb->copied_timestamp = 0; call_void_vb_qop(vb, buf_cleanup, vb); + __vb2_buf_dmabuf_put(vb); } - /* Release previously acquired memory if present */ - __vb2_plane_dmabuf_put(vb, &vb->planes[plane]); - - /* Acquire each plane's memory */ - mem_priv = call_ptr_memop(attach_dmabuf, - vb, - q->alloc_devs[plane] ? : q->dev, - dbuf, - planes[plane].length); - if (IS_ERR(mem_priv)) { - dprintk(q, 1, "failed to attach dmabuf\n"); - ret = PTR_ERR(mem_priv); - dma_buf_put(dbuf); - goto err; - } - - vb->planes[plane].dbuf = dbuf; - vb->planes[plane].mem_priv = mem_priv; - } + for (plane = 0; plane < vb->num_planes; ++plane) { + /* Acquire each plane's memory */ + mem_priv = call_ptr_memop(attach_dmabuf, + vb, + q->alloc_devs[plane] ? : q->dev, + planes[plane].dbuf, + planes[plane].length); + if (IS_ERR(mem_priv)) { + dprintk(q, 1, "failed to attach dmabuf\n"); + ret = PTR_ERR(mem_priv); + goto err_put_vb2_buf; + } - /* - * This pins the buffer(s) with dma_buf_map_attachment()). It's done - * here instead just before the DMA, while queueing the buffer(s) so - * userspace knows sooner rather than later if the dma-buf map fails. - */ - for (plane = 0; plane < vb->num_planes; ++plane) { - if (vb->planes[plane].dbuf_mapped) - continue; + vb->planes[plane].dbuf = planes[plane].dbuf; + vb->planes[plane].mem_priv = mem_priv; - ret = call_memop(vb, map_dmabuf, vb->planes[plane].mem_priv); - if (ret) { - dprintk(q, 1, "failed to map dmabuf for plane %d\n", - plane); - goto err; + /* + * This pins the buffer(s) with dma_buf_map_attachment()). It's done + * here instead just before the DMA, while queueing the buffer(s) so + * userspace knows sooner rather than later if the dma-buf map fails. + */ + ret = call_memop(vb, map_dmabuf, vb->planes[plane].mem_priv); + if (ret) { + dprintk(q, 1, "failed to map dmabuf for plane %d\n", + plane); + goto err_put_vb2_buf; + } + vb->planes[plane].dbuf_mapped = 1; } - vb->planes[plane].dbuf_mapped = 1; - } - /* - * Now that everything is in order, copy relevant information - * provided by userspace. - */ - for (plane = 0; plane < vb->num_planes; ++plane) { - vb->planes[plane].bytesused = planes[plane].bytesused; - vb->planes[plane].length = planes[plane].length; - vb->planes[plane].m.fd = planes[plane].m.fd; - vb->planes[plane].data_offset = planes[plane].data_offset; - } + /* + * Now that everything is in order, copy relevant information + * provided by userspace. + */ + for (plane = 0; plane < vb->num_planes; ++plane) { + vb->planes[plane].bytesused = planes[plane].bytesused; + vb->planes[plane].length = planes[plane].length; + vb->planes[plane].m.fd = planes[plane].m.fd; + vb->planes[plane].data_offset = planes[plane].data_offset; + } - if (reacquired) { /* * Call driver-specific initialization on the newly acquired buffer, * if provided. @@ -1479,19 +1473,28 @@ static int __prepare_dmabuf(struct vb2_buffer *vb) ret = call_vb_qop(vb, buf_init, vb); if (ret) { dprintk(q, 1, "buffer initialization failed\n"); - goto err; + goto err_put_vb2_buf; } + } else { + for (plane = 0; plane < vb->num_planes; ++plane) + dma_buf_put(planes[plane].dbuf); } ret = call_vb_qop(vb, buf_prepare, vb); if (ret) { dprintk(q, 1, "buffer preparation failed\n"); call_void_vb_qop(vb, buf_cleanup, vb); - goto err; + goto err_put_vb2_buf; } return 0; -err: + +err_put_planes: + for (plane = 0; plane < vb->num_planes; ++plane) { + if (!IS_ERR_OR_NULL(planes[plane].dbuf)) + dma_buf_put(planes[plane].dbuf); + } +err_put_vb2_buf: /* In case of errors, release planes that were already acquired */ __vb2_buf_dmabuf_put(vb);