From patchwork Thu Jun 18 15:39:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11612617 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B71B3912 for ; Thu, 18 Jun 2020 15:43:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9C5AC2080D for ; Thu, 18 Jun 2020 15:43:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="Ys6tPDMp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731663AbgFRPmm (ORCPT ); Thu, 18 Jun 2020 11:42:42 -0400 Received: from mailout2.w1.samsung.com ([210.118.77.12]:38589 "EHLO mailout2.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731676AbgFRPke (ORCPT ); Thu, 18 Jun 2020 11:40:34 -0400 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout2.w1.samsung.com (KnoxPortal) with ESMTP id 20200618154032euoutp026b63ac7a80f75cdf167ded7e43981f08~ZrZzu1ktj1486314863euoutp02B for ; Thu, 18 Jun 2020 15:40:32 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.w1.samsung.com 20200618154032euoutp026b63ac7a80f75cdf167ded7e43981f08~ZrZzu1ktj1486314863euoutp02B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1592494832; bh=65zQC7AbXs+h4Aa/SkiEZNz20G0ZAx6H0WtGo6ycvZM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ys6tPDMppm6MDIKiMmLpGE88KOX2pjycGDf8E/idJDvMUlqOKgJxqmaqQXmHqFgvh ga6HQk+MK3hg6PLgGk1i2rnihS+WoQhW6ht09TRCDOU9uqK1dgwSsEfVoZtbqNZ23h Oa6FFb7DPAZiD4s7Vv2OtH3oIiT38Yk3Y9+bsiUw= Received: from eusmges2new.samsung.com (unknown [203.254.199.244]) by eucas1p1.samsung.com (KnoxPortal) with ESMTP id 20200618154032eucas1p1d3bfbecb45e593df35fc1a5d9bc32f82~ZrZzS1hLI1547315473eucas1p1j; Thu, 18 Jun 2020 15:40:32 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges2new.samsung.com (EUCPMTA) with SMTP id 18.DE.60679.0FA8BEE5; Thu, 18 Jun 2020 16:40:32 +0100 (BST) Received: from eusmtrp2.samsung.com (unknown [182.198.249.139]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20200618154032eucas1p25df137bd9c481bcbc39320f0167b225a~ZrZzCLLL-0608706087eucas1p2d; Thu, 18 Jun 2020 15:40:32 +0000 (GMT) Received: from eusmgms1.samsung.com (unknown [182.198.249.179]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20200618154032eusmtrp23b5676a37b4a2f268e9c0909934bb080~ZrZzBbtPO0399203992eusmtrp2j; Thu, 18 Jun 2020 15:40:32 +0000 (GMT) X-AuditID: cbfec7f4-0cbff7000001ed07-47-5eeb8af0ddf9 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id A3.FE.08375.FEA8BEE5; Thu, 18 Jun 2020 16:40:31 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200618154031eusmtip1413e3ed550e7c80c9654005fa7787835~ZrZyTCItf0744107441eusmtip14; Thu, 18 Jun 2020 15:40:31 +0000 (GMT) From: Marek Szyprowski To: dri-devel@lists.freedesktop.org, iommu@lists.linux-foundation.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org Cc: Marek Szyprowski , Christoph Hellwig , Robin Murphy , Bartlomiej Zolnierkiewicz , linux-arm-kernel@lists.infradead.org, David Airlie , Daniel Vetter , Mauro Carvalho Chehab , Laurent Pinchart , Kieran Bingham , linux-renesas-soc@vger.kernel.org, linux-media@vger.kernel.org Subject: [PATCH v6 26/36] drm: rcar-du: fix common struct sg_table related issues Date: Thu, 18 Jun 2020 17:39:47 +0200 Message-Id: <20200618153956.29558-27-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618153956.29558-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0WSe0hTYRjG+87ZOTsTt86m5JtJ1iIjQcsucsCykqBDYQRGN0pberLITdvS sv5ICmubt0xJnWYWlTU1bU0rxTQrl5grTE2xi2YXzSzRaSRLcx6t/37P8z4v78PHR+GyBsKd Oqw6xqlViig56SSoqP9t9RnU94cuL7VImBRrA8bczS4lmImKdJxpGflJMreLnmFMQU0AM9SW hBhd+nUhY2vpxhhTTxvBvK7MI5nksnKCKe/7gTElT98JmZsmO8Y8HvxErKfZ4vxixFaPFgjY XG0OwZqMOpK9P9pFsB+SLBh77/pptnO8B2cz2gsRW9WRQLKpZiNih03ztznvcVoTwUUdjuPU ywL3Ox0yt74hYybghMFmRwlozFWPRBTQq+BzwjVMj5woGX0LQbb+Ms4LG4LmhhsCXgwjaOt/ IZhZ6a07Pz0oRHB1oAr7t2Iur0WOFEn7gX5ATzrYlU5E8DzF2cE4bcchK2+dHlGUCx0C79MW OmwBvRgepemm4mI6EFLrK0n+mCcUldXiDhZN+o2WRIL3PwrhZdVBnjeCtrp5upwLfLOYhTx7 wMTDK1PdgD6LoNtaIuRFMoLXZ7IRnwqAt9Yx0lEIp5dCaeUy3t4AWXYbcthAS6B9QMrXl8DF iiyct8WgPSfj015gsNz5d/bxq2acZxYyDTNvlY7AZjWQF5Cn4f+xAoSMyI2L1SgjOc0KFXfc V6NQamJVkb7h0UoTmvxgjeMW2wNUaT9Qh2gKyZ3Fvdv7Q2WEIk4Tr6xDQOFyV3FQU2OoTByh iD/JqaPD1LFRnKYOzaMEcjfxymt9+2R0pOIYd4TjYjj1zBSjRO4JyEfhm//ZHLFwyaeOWTvm Fktzvvj7zF0b7NXZmbMvSDrniSF4t9/OFboRaU14qqjdI6zvadmvU5nRH9pb/4jOh9T3ZmiN /kpW1zW7rGnBV/GuAtp/a+7t1cpnknX3RoYk3PLWo3u9vys7itYuqtB2s5eaCncVjW5ReboE FwdsEsdtBrlAc0jh542rNYq/qF7emlwDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrLIsWRmVeSWpSXmKPExsVy+t/xu7rvu17HGWy/bmPRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMlks2G9t8elaN6NF58Ql7BZfrjxkstj0+BqrxeVdc9gsejZsZbXY +vIdk8XaI3fZLZZt+sNkcfDDE1YHAY8189Yweuz9toDFY3bHTFaPTas62Ty2f3vA6nG/+ziT x+Yl9R63/z1m9ph8Yzmjx+6bDWwefVtWMXp83iQXwBOlZ1OUX1qSqpCRX1xiqxRtaGGkZ2hp oWdkYqlnaGwea2VkqqRvZ5OSmpNZllqkb5egl7Hl6nW2gv8SFbO+/GFsYPwl0sXIySEhYCLx 4lA7SxcjF4eQwFJGiZatm5ghEjISJ6c1sELYwhJ/rnWxQRR9YpTYcqaNHSTBJmAo0fUWIiEi 0MkoMa37IzuIwyzQwiLx4dNDFpAqYYFAiVsfPoB1sAioSuzr72QDsXkF7CT6ju1ig1ghL7F6 wwGw1ZxA8dPHW8FWCwnYSjz/0MY2gZFvASPDKkaR1NLi3PTcYkO94sTc4tK8dL3k/NxNjMCo 2nbs5+YdjJc2Bh9iFOBgVOLhfRHyOk6INbGsuDL3EKMEB7OSCK/T2dNxQrwpiZVVqUX58UWl OanFhxhNgY6ayCwlmpwPjPi8knhDU0NzC0tDc2NzYzMLJXHeDoGDMUIC6YklqdmpqQWpRTB9 TBycUg2Meld2fPpktf16wftIt//XX8l27faWL79nwGQu93xv1v2q5ZrC7ZNNV86d0Wfqfrq+ 6fHrf2mXpDg11r9/uDj9RxKn7l7b66l6Sit+G33cmVtVOJdxbxuP0w4fVlGxzyseLXb6xKHp fF3zv/ObtzM0nC/NF+PeVZg3ZXHG37qpV4vE/yop6630UGIpzkg01GIuKk4EAIapYQbAAgAA X-CMS-MailID: 20200618154032eucas1p25df137bd9c481bcbc39320f0167b225a X-Msg-Generator: CA X-RootMTR: 20200618154032eucas1p25df137bd9c481bcbc39320f0167b225a X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200618154032eucas1p25df137bd9c481bcbc39320f0167b225a References: <20200618153956.29558-1-m.szyprowski@samsung.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The Documentation/DMA-API-HOWTO.txt states that the dma_map_sg() function returns the number of the created entries in the DMA address space. However the subsequent calls to the dma_sync_sg_for_{device,cpu}() and dma_unmap_sg must be called with the original number of the entries passed to the dma_map_sg(). struct sg_table is a common structure used for describing a non-contiguous memory buffer, used commonly in the DRM and graphics subsystems. It consists of a scatterlist with memory pages and DMA addresses (sgl entry), as well as the number of scatterlist entries: CPU pages (orig_nents entry) and DMA mapped pages (nents entry). It turned out that it was a common mistake to misuse nents and orig_nents entries, calling DMA-mapping functions with a wrong number of entries or ignoring the number of mapped entries returned by the dma_map_sg() function. To avoid such issues, lets use a common dma-mapping wrappers operating directly on the struct sg_table objects and use scatterlist page iterators where possible. This, almost always, hides references to the nents and orig_nents entries, making the code robust, easier to follow and copy/paste safe. dma_map_sgtable() function returns zero or an error code, so adjust the return value check for the vsp1_du_map_sg() function. Signed-off-by: Marek Szyprowski Reviewed-by: Laurent Pinchart --- drivers/gpu/drm/rcar-du/rcar_du_vsp.c | 3 +-- drivers/media/platform/vsp1/vsp1_drm.c | 8 ++++---- 2 files changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c index f1a81c9b184d..a27bff999649 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c @@ -197,9 +197,8 @@ int rcar_du_vsp_map_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb, goto fail; ret = vsp1_du_map_sg(vsp->vsp, sgt); - if (!ret) { + if (ret) { sg_free_table(sgt); - ret = -ENOMEM; goto fail; } } diff --git a/drivers/media/platform/vsp1/vsp1_drm.c b/drivers/media/platform/vsp1/vsp1_drm.c index a4a45d68a6ef..86d5e3f4b1ff 100644 --- a/drivers/media/platform/vsp1/vsp1_drm.c +++ b/drivers/media/platform/vsp1/vsp1_drm.c @@ -912,8 +912,8 @@ int vsp1_du_map_sg(struct device *dev, struct sg_table *sgt) * skip cache sync. This will need to be revisited when support for * non-coherent buffers will be added to the DU driver. */ - return dma_map_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, - DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + return dma_map_sgtable(vsp1->bus_master, sgt, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); } EXPORT_SYMBOL_GPL(vsp1_du_map_sg); @@ -921,8 +921,8 @@ void vsp1_du_unmap_sg(struct device *dev, struct sg_table *sgt) { struct vsp1_device *vsp1 = dev_get_drvdata(dev); - dma_unmap_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, - DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable(vsp1->bus_master, sgt, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); } EXPORT_SYMBOL_GPL(vsp1_du_unmap_sg); From patchwork Thu Jun 18 15:39:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11612619 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3A97014E3 for ; Thu, 18 Jun 2020 15:43:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1CD102075E for ; Thu, 18 Jun 2020 15:43:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="dSPyOfm8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727991AbgFRPmm (ORCPT ); Thu, 18 Jun 2020 11:42:42 -0400 Received: from mailout2.w1.samsung.com ([210.118.77.12]:38500 "EHLO mailout2.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731626AbgFRPkf (ORCPT ); Thu, 18 Jun 2020 11:40:35 -0400 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout2.w1.samsung.com (KnoxPortal) with ESMTP id 20200618154033euoutp023860126be91df5c48706ffde2c9afcd3~ZrZ0uPeCu1314813148euoutp02V for ; Thu, 18 Jun 2020 15:40:33 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.w1.samsung.com 20200618154033euoutp023860126be91df5c48706ffde2c9afcd3~ZrZ0uPeCu1314813148euoutp02V DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1592494833; bh=oVvlfd4BWRvKpcZfemLuoBrPFcZ7vE33qi6qHPEMJzU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dSPyOfm8Xi2QeklVKxSlz4TGAkwFJ+qMqcizVW4gmb5E3UdS1dwydbNbgkKO1aB33 ipPKyKKMRty3mYOJo0ushhwBjeu/dv2VCjdhfNASwfs9hoWnvt4jwkjt+UL+wygF37 Fss0GzAQ6wKIwcWopTCbW2fl+dVOKyZCeqWePvM4= Received: from eusmges2new.samsung.com (unknown [203.254.199.244]) by eucas1p1.samsung.com (KnoxPortal) with ESMTP id 20200618154033eucas1p1676e3e922d494242ee5bc56824e10314~ZrZ0IiRMn1547315473eucas1p1l; Thu, 18 Jun 2020 15:40:33 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges2new.samsung.com (EUCPMTA) with SMTP id 49.DE.60679.1FA8BEE5; Thu, 18 Jun 2020 16:40:33 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20200618154032eucas1p207c05c83d16e48c5a48ebd1e7d2862d1~ZrZzugruN0607806078eucas1p2h; Thu, 18 Jun 2020 15:40:32 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200618154032eusmtrp1e8b53ee40b51b62e4235de887e40e161~ZrZzt5D7O2230622306eusmtrp1G; Thu, 18 Jun 2020 15:40:32 +0000 (GMT) X-AuditID: cbfec7f4-0cbff7000001ed07-4b-5eeb8af14220 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 6E.E9.07950.0FA8BEE5; Thu, 18 Jun 2020 16:40:32 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200618154032eusmtip14ac43baf3309dbdb79015862c26c5318~ZrZzBdlXn0709107091eusmtip1w; Thu, 18 Jun 2020 15:40:31 +0000 (GMT) From: Marek Szyprowski To: dri-devel@lists.freedesktop.org, iommu@lists.linux-foundation.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org Cc: Marek Szyprowski , Christoph Hellwig , Robin Murphy , Bartlomiej Zolnierkiewicz , linux-arm-kernel@lists.infradead.org, David Airlie , Daniel Vetter , Sumit Semwal , Gerd Hoffmann , linux-media@vger.kernel.org Subject: [PATCH v6 27/36] dmabuf: fix common struct sg_table related issues Date: Thu, 18 Jun 2020 17:39:48 +0200 Message-Id: <20200618153956.29558-28-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618153956.29558-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSa0hTYRjmO3fFyXGafmkpDLpYlFmBJxQpCTogRhf/FGTNOmjopuy40n6U mUosNU1BkwwxzXKV5mXmrJarXGs5bF7SVErspqJmW1dv7Xi0/j3v87zP9zy8fBQqbcN9qZPK FE6llCfKCFdM1/7bumlaMx6zZcZGMblWM8LcL6nFmQVdAcp0f58imNva5whTbghlPr01o4yj exhh6kd6caZLf41gcuqacObusyGSafv6AWdeDtnJne7snet3APvoRznGDvY+JNjmH+9x9t0l E8I2VJ5jB+ZHULawrxqwrf3pBDv1uIdg8xprAGuv99/ndtg17ASXePIUpwoKP+Yav9DxikzO 90utKzcg6UDvrQEuFKS3w8ay15gGuFJS+haAZZlPUHFwAHjzfScpDnYAO3uKyGVLQ1YHIQrV ABY3aRFBWLRoH3kJmKCDoWZCQwjYi84C8EWum2BA6UwU1hjOLwqedCQ0XG0FAsboNdDaP7uY IKHD4Y3MdkRMC4DaOqGTC+Xi5C2mLFx4CNI2Ej4tq0PFpd3wYd43QsSecMzUuFR1FbQU5mCi 4QKAw9a7pDjkANiVUQLErVA4aP3jdFPOfoGwVh8k0rtgf7UREWhIu8O+CQ+BRp3wiq4YFWkJ vJgtFbfXwlLTvX+xbZ22pWosHGyZA+K1CgC0lBjQfBBQ+j+sHIAa4MOpeUUcx29Vcqc383IF r1bGbT6epKgHzo9lmTc5HgD9bKwR0BSQuUm+RI/HSHH5KT5NYQSQQmVekogOS4xUckKedoZT JR1VqRM53gj8KEzmI9lWMXpESsfJU7gEjkvmVMsqQrn4pgPeM2qlLYHEVJd1sV/2bNySFJY2 N+vviHBUVZSl+P20F+zPOJQqNX/oMH1+RoyOpf5805M/NNlyttUYQsWnEjPrV3tn57nHRvzy eBx5YHKd2dwY7WGbXZHtY8RLdIE7XrYW65Tag4PTTyvVUTkp0bEhtVUDgUUhDeMfm1nt3uxQ GcbHy4M3oCpe/hdEryDvVAMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrMIsWRmVeSWpSXmKPExsVy+t/xu7oful7HGew6qGnRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMlks2G9t8ezWSWaLL1ceMllsenyN1eLyrjlsFj0btrJarD1yl93i 4IcnrBan7n5md+DzWDNvDaPH3m8LWDzuXNvD5rH92wNWj/vdx5k8Ni+p97j97zGzx+Qbyxk9 dt9sYPN4v+8qm0ffllWMHp83yQXwROnZFOWXlqQqZOQXl9gqRRtaGOkZWlroGZlY6hkam8da GZkq6dvZpKTmZJalFunbJehl/D97hr1ggnTFhgX7mRoYd4l1MXJySAiYSGxuPcvWxcjFISSw lFFi48GLzBAJGYmT0xpYIWxhiT/XuqCKPjFKLF24ix0kwSZgKNH1FiIhItDJKDGt+yM7iMMs 0MMscWnhF0aQKmEBb4n9M3eD2SwCqhLnbv4B6+YVsJNY3HKMCWKFvMTqDQfAVnMCxU8fbwVb LSRgK/H8QxvbBEa+BYwMqxhFUkuLc9Nzi430ihNzi0vz0vWS83M3MQIjaNuxn1t2MHa9Cz7E KMDBqMTD+yLkdZwQa2JZcWXuIUYJDmYlEV6ns6fjhHhTEiurUovy44tKc1KLDzGaAh01kVlK NDkfGN15JfGGpobmFpaG5sbmxmYWSuK8HQIHY4QE0hNLUrNTUwtSi2D6mDg4pRoYNY2kn/jX eJjZv1G/xOj2WNk+va7I/9OGvHeeTlVS/FMVX/s7vi4tvVQc1HYl+7Sbrb3+n+u+5munaaz9 dZflbIHkgqw6sWPfFp1xuetzZdXiXfPfP2I+9cZmh+seA62XuftePMnbdNvp31rum78SZOQj Log+WpAdk3WE913HtvcaM14UG21kUGIpzkg01GIuKk4EADm1sOS2AgAA X-CMS-MailID: 20200618154032eucas1p207c05c83d16e48c5a48ebd1e7d2862d1 X-Msg-Generator: CA X-RootMTR: 20200618154032eucas1p207c05c83d16e48c5a48ebd1e7d2862d1 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200618154032eucas1p207c05c83d16e48c5a48ebd1e7d2862d1 References: <20200618153956.29558-1-m.szyprowski@samsung.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The Documentation/DMA-API-HOWTO.txt states that the dma_map_sg() function returns the number of the created entries in the DMA address space. However the subsequent calls to the dma_sync_sg_for_{device,cpu}() and dma_unmap_sg must be called with the original number of the entries passed to the dma_map_sg(). struct sg_table is a common structure used for describing a non-contiguous memory buffer, used commonly in the DRM and graphics subsystems. It consists of a scatterlist with memory pages and DMA addresses (sgl entry), as well as the number of scatterlist entries: CPU pages (orig_nents entry) and DMA mapped pages (nents entry). It turned out that it was a common mistake to misuse nents and orig_nents entries, calling DMA-mapping functions with a wrong number of entries or ignoring the number of mapped entries returned by the dma_map_sg() function. To avoid such issues, lets use a common dma-mapping wrappers operating directly on the struct sg_table objects and use scatterlist page iterators where possible. This, almost always, hides references to the nents and orig_nents entries, making the code robust, easier to follow and copy/paste safe. Signed-off-by: Marek Szyprowski Acked-by: Gerd Hoffmann --- drivers/dma-buf/heaps/heap-helpers.c | 13 ++++++------- drivers/dma-buf/udmabuf.c | 7 +++---- 2 files changed, 9 insertions(+), 11 deletions(-) diff --git a/drivers/dma-buf/heaps/heap-helpers.c b/drivers/dma-buf/heaps/heap-helpers.c index 9f964ca3f59c..d0696cf937af 100644 --- a/drivers/dma-buf/heaps/heap-helpers.c +++ b/drivers/dma-buf/heaps/heap-helpers.c @@ -140,13 +140,12 @@ struct sg_table *dma_heap_map_dma_buf(struct dma_buf_attachment *attachment, enum dma_data_direction direction) { struct dma_heaps_attachment *a = attachment->priv; - struct sg_table *table; - - table = &a->table; + struct sg_table *table = &a->table; + int ret; - if (!dma_map_sg(attachment->dev, table->sgl, table->nents, - direction)) - table = ERR_PTR(-ENOMEM); + ret = dma_map_sgtable(attachment->dev, table, direction, 0); + if (ret) + table = ERR_PTR(ret); return table; } @@ -154,7 +153,7 @@ static void dma_heap_unmap_dma_buf(struct dma_buf_attachment *attachment, struct sg_table *table, enum dma_data_direction direction) { - dma_unmap_sg(attachment->dev, table->sgl, table->nents, direction); + dma_unmap_sgtable(attachment->dev, table, direction, 0); } static vm_fault_t dma_heap_vm_fault(struct vm_fault *vmf) diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index acb26c627d27..89e293bd9252 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -63,10 +63,9 @@ static struct sg_table *get_sg_table(struct device *dev, struct dma_buf *buf, GFP_KERNEL); if (ret < 0) goto err; - if (!dma_map_sg(dev, sg->sgl, sg->nents, direction)) { - ret = -EINVAL; + ret = dma_map_sgtable(dev, sg, direction, 0); + if (ret < 0) goto err; - } return sg; err: @@ -78,7 +77,7 @@ static struct sg_table *get_sg_table(struct device *dev, struct dma_buf *buf, static void put_sg_table(struct device *dev, struct sg_table *sg, enum dma_data_direction direction) { - dma_unmap_sg(dev, sg->sgl, sg->nents, direction); + dma_unmap_sgtable(dev, sg, direction, 0); sg_free_table(sg); kfree(sg); } From patchwork Thu Jun 18 15:39:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11612603 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EF57E912 for ; Thu, 18 Jun 2020 15:42:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D29C920890 for ; Thu, 18 Jun 2020 15:42:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="QZy6brri" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731187AbgFRPmU (ORCPT ); Thu, 18 Jun 2020 11:42:20 -0400 Received: from mailout1.w1.samsung.com ([210.118.77.11]:54904 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731696AbgFRPki (ORCPT ); Thu, 18 Jun 2020 11:40:38 -0400 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200618154036euoutp01a1c6289a9116739dbb301870c9e2ee87~ZrZ3Artil1845318453euoutp01O for ; Thu, 18 Jun 2020 15:40:36 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200618154036euoutp01a1c6289a9116739dbb301870c9e2ee87~ZrZ3Artil1845318453euoutp01O DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1592494836; bh=RMBhG1Fw6ugPclokWBJRv00vV8Qg1yQmDHqJxe7Y93k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QZy6brriuE+JlpxBYK/yvbi6pE6pAz+WGlL7ttKfFzftt9fDBEUrrEw6hOx3xd9k8 FH3IO8v4Ybe06ehSXUp05eJrdLiA7nKIqTyzhS2Uj8PM/H/jyDOaPNWiZ5d8Yhr/e9 h5f8zS6aSDsX6Q9nK5G3qLbl6Fi8gyh7mstTNU/I= Received: from eusmges3new.samsung.com (unknown [203.254.199.245]) by eucas1p1.samsung.com (KnoxPortal) with ESMTP id 20200618154035eucas1p117a6a9102b0d7e4a1993743678c0a19b~ZrZ2komC01248212482eucas1p14; Thu, 18 Jun 2020 15:40:35 +0000 (GMT) Received: from eucas1p2.samsung.com ( [182.198.249.207]) by eusmges3new.samsung.com (EUCPMTA) with SMTP id 4E.60.60698.3FA8BEE5; Thu, 18 Jun 2020 16:40:35 +0100 (BST) Received: from eusmtrp2.samsung.com (unknown [182.198.249.139]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20200618154035eucas1p24774788a08a2d2a0a7e24c8755c885ed~ZrZ2QXB0R0607806078eucas1p2l; Thu, 18 Jun 2020 15:40:35 +0000 (GMT) Received: from eusmgms1.samsung.com (unknown [182.198.249.179]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20200618154035eusmtrp2e6f73cde99b8d3900a2790d28e272d8d~ZrZ2PoLOU0370403704eusmtrp2u; Thu, 18 Jun 2020 15:40:35 +0000 (GMT) X-AuditID: cbfec7f5-a0fff7000001ed1a-4a-5eeb8af3b678 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id 96.FE.08375.3FA8BEE5; Thu, 18 Jun 2020 16:40:35 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200618154034eusmtip14d2941d234d8a5183f57af3dab10a663~ZrZ1ZHKzG2819228192eusmtip1a; Thu, 18 Jun 2020 15:40:34 +0000 (GMT) From: Marek Szyprowski To: dri-devel@lists.freedesktop.org, iommu@lists.linux-foundation.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org Cc: Marek Szyprowski , Christoph Hellwig , Robin Murphy , Bartlomiej Zolnierkiewicz , linux-arm-kernel@lists.infradead.org, David Airlie , Daniel Vetter , Dmitry Osipenko , Mauro Carvalho Chehab , Greg Kroah-Hartman , Thierry Reding , Jonathan Hunter , linux-media@vger.kernel.org, linux-tegra@vger.kernel.org, devel@driverdev.osuosl.org Subject: [PATCH v6 30/36] staging: tegra-vde: fix common struct sg_table related issues Date: Thu, 18 Jun 2020 17:39:51 +0200 Message-Id: <20200618153956.29558-31-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618153956.29558-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0WSf0yMcRzHfZ/nueeezp2erjbflTFntcWEZXwtWqw/Hv6gYUwSh2cd7i67 q/TjD1epueNKmlVX0lSi7tw5KYVyiWOXmJQfCS2jnDrpx6olup7iv9fnx/vz/ny++1K4+AvP lzqmjGNVSqlcQgqImifjL1YO6ZzRqysHViB96zMM3co389Cfmhwc3W+Z4KOqwR6AXo+4SJRe aibRjarHGCppDEFnDFcJNPy6G0PWng4eaqsvItF5yx0e0g4bSGRq7uKja9ZJDNl+fuGh8fpi IsybMRYbAfOx4RHBPBgtIZg6QxefsVZqSaZ29DOPabxs5DOfztkx5nbZaaZzqgdnct9WAObe Ow3J6NMHSCaruhIwQ9bFEZ6Rgo1HWfmxBFa1KvSQQPYyy4yf/OqZqCnfrwHFIh3woCC9Fv7o +ErqgIAS09cBbP89xOOCYQDT35cQXDAE4BvXNzAn0Y/aAFeoANDQnIq7CzMSY06Am0l6DdT1 60g3+9AZAD7VC92M0y0EbBkLdrM3vQ+OdX6e0RK0PzQ6jZibRXQorGu2kpzZElhleTjT4zGd d9gzZtaDdA4FM5yFs03h8E2bjc+xN/xur57lRfBP3RWME6QD2N1q4nPBeQDb0vJn7wmBH1on pidR0+sFQnP9KjdCejO8UEtyuAC+7ffi9l8AL9bk4VxaBM9mirkZAdBgv/nP1fby1WwLA/sr IPc6OQCee8e/AJYY/juVAFAJFrLxakUMqw5WsqeC1FKFOl4ZE3QkVmEF03/PMWUfuQsaJg83 AZoCEqGod7czWsyTJqiTFE0AUrjER7TluSNaLDoqTUpmVbEHVfFyVt0E/ChCslAUfLXvgJiO kcaxJ1j2JKuaq2KUh68GXEk6btGmyUoDO8oLurrnr5Pv8RTuCsPGx12bVL3ZPhucSwu85vX+ LlOYhK7EgpSpoj3Pp+zt+m2m9SZH+L0U/+V4buG3Io1zfWLHpeQ4PcmPjIzYutO7EQ/dG4Xy /Np9+8JDGjIFKcsE2ysGBi0yujS1TjvxS3xzx+7ssdh5URJCLZOuWY6r1NK/niSrNncDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrFIsWRmVeSWpSXmKPExsVy+t/xu7qfu17HGeyYIWnRe+4kk8XGGetZ Lf5vm8hssefML3aL1R8fM1pc+fqezaJ58Xo2i5WrjzJZLNhvbdEyaxGLxZcrD5ksNj2+xmpx edccNoueDVtZLTq/zGKzWHvkLrvFsk1/mCwOfnjCavFz1zwWB2GPNfPWMHrc23eYxWPvtwUs Hjtn3WX32LSqk81j+7cHrB77565h97jffZzJY/OSeo/b/x4ze0y+sZzRY/fNBjaP3uZ3bB59 W1YxenzeJBfAH6VnU5RfWpKqkJFfXGKrFG1oYaRnaGmhZ2RiqWdobB5rZWSqpG9nk5Kak1mW WqRvl6CXcaFvPXPBM/6KhqXRDYzzeLsYOTkkBEwker8dZOxi5OIQEljKKPH34F9miISMxMlp DawQtrDEn2tdbBBFnxglLj3dwgKSYBMwlOh6C5EQEehklJjW/ZEdxGEWuMEiMXfLB3aQKmGB cIlrG3rAxrIIqEqseb2GCcTmFbCT2HlkExvECnmJ1RsOgNVwAsVPH28FWy0kYCvx/EMb2wRG vgWMDKsYRVJLi3PTc4sN9YoTc4tL89L1kvNzNzEC43HbsZ+bdzBe2hh8iFGAg1GJh/dFyOs4 IdbEsuLK3EOMEhzMSiK8TmdPxwnxpiRWVqUW5ccXleakFh9iNAU6aiKzlGhyPjBV5JXEG5oa mltYGpobmxubWSiJ83YIHIwREkhPLEnNTk0tSC2C6WPi4JRqYJST2DZtxd3HkuESWjuv5wjL Flrdri0rmbiOw9rW6cfXJbq/CmaUJ+wOWDdd/9NXEce11kXiAqxPw2rKzUS3Ll+4RTvi88Sl u34eadaZa+eVmP/iy+EJMbbXp9xonbvp8vbo2X9nNB61S5HifzDhzAN+o6gspwtCnn85tl++ U85y+2bBlu1dVpZKLMUZiYZazEXFiQDLpozC3QIAAA== X-CMS-MailID: 20200618154035eucas1p24774788a08a2d2a0a7e24c8755c885ed X-Msg-Generator: CA X-RootMTR: 20200618154035eucas1p24774788a08a2d2a0a7e24c8755c885ed X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200618154035eucas1p24774788a08a2d2a0a7e24c8755c885ed References: <20200618153956.29558-1-m.szyprowski@samsung.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The Documentation/DMA-API-HOWTO.txt states that the dma_map_sg() function returns the number of the created entries in the DMA address space. However the subsequent calls to the dma_sync_sg_for_{device,cpu}() and dma_unmap_sg must be called with the original number of the entries passed to the dma_map_sg(). struct sg_table is a common structure used for describing a non-contiguous memory buffer, used commonly in the DRM and graphics subsystems. It consists of a scatterlist with memory pages and DMA addresses (sgl entry), as well as the number of scatterlist entries: CPU pages (orig_nents entry) and DMA mapped pages (nents entry). It turned out that it was a common mistake to misuse nents and orig_nents entries, calling DMA-mapping functions with a wrong number of entries or ignoring the number of mapped entries returned by the dma_map_sg() function. To avoid such issues, lets use a common dma-mapping wrappers operating directly on the struct sg_table objects and use scatterlist page iterators where possible. This, almost always, hides references to the nents and orig_nents entries, making the code robust, easier to follow and copy/paste safe. Signed-off-by: Marek Szyprowski Reviewed-by: Dmitry Osipenko --- drivers/staging/media/tegra-vde/iommu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/tegra-vde/iommu.c b/drivers/staging/media/tegra-vde/iommu.c index 6af863d92123..adf8dc7ee25c 100644 --- a/drivers/staging/media/tegra-vde/iommu.c +++ b/drivers/staging/media/tegra-vde/iommu.c @@ -36,8 +36,8 @@ int tegra_vde_iommu_map(struct tegra_vde *vde, addr = iova_dma_addr(&vde->iova, iova); - size = iommu_map_sg(vde->domain, addr, sgt->sgl, sgt->nents, - IOMMU_READ | IOMMU_WRITE); + size = iommu_map_sgtable(vde->domain, addr, sgt, + IOMMU_READ | IOMMU_WRITE); if (!size) { __free_iova(&vde->iova, iova); return -ENXIO; From patchwork Thu Jun 18 15:39:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11612595 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 02B96159A for ; Thu, 18 Jun 2020 15:41:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D9F592075E for ; Thu, 18 Jun 2020 15:41:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="qtuJqSX5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731822AbgFRPlg (ORCPT ); Thu, 18 Jun 2020 11:41:36 -0400 Received: from mailout1.w1.samsung.com ([210.118.77.11]:54965 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731718AbgFRPko (ORCPT ); Thu, 18 Jun 2020 11:40:44 -0400 Received: from eucas1p1.samsung.com (unknown [182.198.249.206]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200618154038euoutp01553e335486f00b76333addedda856ade~ZrZ5eNXFj1845018450euoutp01S for ; Thu, 18 Jun 2020 15:40:38 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200618154038euoutp01553e335486f00b76333addedda856ade~ZrZ5eNXFj1845018450euoutp01S DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1592494838; bh=kbdu9i1ky3V53J/j8HYin75jAIlE4fk1hTbkVYKJ63U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qtuJqSX50UehzTTehb30PiCIx/7WFPerqbtj5a/WEd3Sih0knMwnhxog6/KaQxkih a54qsCnhMRvbELXx8G2ZyLPb35Wscvh2tRUkB7owR5Vlvi5aZzWdbQUvIJ1bgGav+S 7TNEjWVMGCmqTjl5dxLAEoZSWs350JfMJev2ITv8= Received: from eusmges2new.samsung.com (unknown [203.254.199.244]) by eucas1p2.samsung.com (KnoxPortal) with ESMTP id 20200618154038eucas1p2121f339d68d5829bf83f6bc2eaab00c4~ZrZ5AnrD-0501005010eucas1p23; Thu, 18 Jun 2020 15:40:38 +0000 (GMT) Received: from eucas1p2.samsung.com ( [182.198.249.207]) by eusmges2new.samsung.com (EUCPMTA) with SMTP id AC.DE.60679.6FA8BEE5; Thu, 18 Jun 2020 16:40:38 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20200618154038eucas1p18eae40b8fbf97a3e42abef8eb14da946~ZrZ4paTmk1755717557eucas1p1c; Thu, 18 Jun 2020 15:40:38 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200618154038eusmtrp1756f89b0c0bcd84961a6999c354ec4e2~ZrZ4os9eH2230622306eusmtrp1S; Thu, 18 Jun 2020 15:40:38 +0000 (GMT) X-AuditID: cbfec7f4-0e5ff7000001ed07-58-5eeb8af6a314 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 05.F9.07950.5FA8BEE5; Thu, 18 Jun 2020 16:40:38 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200618154037eusmtip178c531fea8bb60f22dafd0aa787bb8a2~ZrZ4BqXtS0864308643eusmtip1P; Thu, 18 Jun 2020 15:40:37 +0000 (GMT) From: Marek Szyprowski To: dri-devel@lists.freedesktop.org, iommu@lists.linux-foundation.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org Cc: Marek Szyprowski , Christoph Hellwig , Robin Murphy , Bartlomiej Zolnierkiewicz , linux-arm-kernel@lists.infradead.org, David Airlie , Daniel Vetter , Mauro Carvalho Chehab , linux-media@vger.kernel.org Subject: [PATCH v6 34/36] media: pci: fix common ALSA DMA-mapping related codes Date: Thu, 18 Jun 2020 17:39:55 +0200 Message-Id: <20200618153956.29558-35-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618153956.29558-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0WSaUhUURiGOXeb6+TEdTQ9WKRNZAu51o9Lhplo3D9BSZhELlNe1BwX5qqp VGqi6ehYKrghMUTkvo06mWYupGMOWaS4pC3ikLmh4QKWjnm9Lf+e873v973fORwSlTbhtmR4 VCyrjJIrZIQY0/VtvHNcV80HuozOW9PqwTcI3Vhcj9PbujyUHl5bIujK6l6E1nS606vDUwit nR7B6aG2MoLOaWjB6drXn0T0M+0mQncvG3FPCVPzuAYwHesajNFWZRHM8/WvOPMlW48wTU+T mQnTNMoUjJUDpn08hWBym6sAs6I9eGnPNfHZEFYRHs8qnT2CxWHfil7gMQvWCS3zJjQFzFqq gBkJqdMwVT1KqICYlFIVABorahFekFKrAI6tKQRhBcCM7Q2gAuRux1RWkOApB/Cl8arg2fHX 65pFvEBQrlC1qCJ4tqLSAexXm/MmlJpGoKZ+ZFewpC7D8q0MjGeMOgJz5+pQPkBCecCmsmPC dnawuqEL5dlsp2zQp+P8HEgNiGBmtgkTTN6wPX9YJLAlnNM3/+ED0FCQgwkNaQBODdaKhEMO gEP3i4HgcoeTgz8JPhmljsP6Nmfhludhx8AdAffCsUUL3ozuYL6uCBXKEpiZIRVmOMBSfd2/ 1O73H1CBGfirZgET3icPwA7jAP4I2JX+z9IAUAVs2DguMpTl3KLY206cPJKLiwp1uhkdqQU7 X8lg0q+2grbNGz2AIoHMXPL9ynygFJfHc4mRPQCSqMxK4vXWECiVhMgTk1hldJAyTsFyPWA/ iclsJKeezAZIqVB5LBvBsjGs8q+KkGa2KcB+IsT76EcbbtnbN90tl3VN04k3hxunnfM9/bPG 77qkJXXlGUyNEX4larcz53zu3RrP8l/qxUXZmJ9xIcEzIDVFvVxh/yPaYgm5kO27ogh9WOx1 /dDFmc7WLZ/DSfuCqZO6DK/C6hI22b5/cuaVY2VFiHt8ZU9Cb1+tAxQ/KPwsw7gwuesJVMnJ fwNiwzczRgMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprOIsWRmVeSWpSXmKPExsVy+t/xu7rful7HGUxsZLToPXeSyWLjjPWs Fv+3TWS2uPL1PZvFytVHmSwW7Le2+HLlIZPFpsfXWC0u75rDZtGzYSurxdojd9ktlm36w2Rx 8MMTVgdejzXz1jB67P22gMVj06pONo/t3x6wetzvPs7ksXlJvcftf4+ZPSbfWM7osftmA5tH 35ZVjB6fN8kFcEfp2RTll5akKmTkF5fYKkUbWhjpGVpa6BmZWOoZGpvHWhmZKunb2aSk5mSW pRbp2yXoZTybvpO14I1YxdbX/5gbGF8KdzFycEgImEg87IzvYuTiEBJYyijxZuYX9i5GTqC4 jMTJaQ2sELawxJ9rXWwQRZ8YJY7/OgCWYBMwlOh6C5EQEehklJjW/ZEdxGEWeM0k0bprDRtI lbCAv8Sy6dNYQGwWAVWJvlfrmEFW8wrYSWyeowGxQV5i9YYDzCA2J1D49PFWsAVCArYSzz+0 sU1g5FvAyLCKUSS1tDg3PbfYSK84Mbe4NC9dLzk/dxMjMFK2Hfu5ZQdj17vgQ4wCHIxKPLwv Ql7HCbEmlhVX5h5ilOBgVhLhdTp7Ok6INyWxsiq1KD++qDQntfgQoynQTROZpUST84FRnFcS b2hqaG5haWhubG5sZqEkztshcDBGSCA9sSQ1OzW1ILUIpo+Jg1OqgbHTcLOqnGvFAz9L24U+ S6e2xf889ZnD6/FF/lVHD12pe/kvNdryR3zwNsY5V7tc7PRP/wi1zxHXM//5rWMqd76FtdXK E62ivap5FVu10q+U3dznt8Sys+dZxrJV1i81HnRprK07ZH4qeEPVbW3vUyV50/5NOCDr2/Xm UZfInN9bWDJ8NE+nuCixFGckGmoxFxUnAgBltq+6qgIAAA== X-CMS-MailID: 20200618154038eucas1p18eae40b8fbf97a3e42abef8eb14da946 X-Msg-Generator: CA X-RootMTR: 20200618154038eucas1p18eae40b8fbf97a3e42abef8eb14da946 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200618154038eucas1p18eae40b8fbf97a3e42abef8eb14da946 References: <20200618153956.29558-1-m.szyprowski@samsung.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The Documentation/DMA-API-HOWTO.txt states that dma_map_sg returns the numer of the created entries in the DMA address space. However the subsequent calls to dma_sync_sg_for_{device,cpu} and dma_unmap_sg must be called with the original number of entries passed to dma_map_sg. The sg_table->nents in turn holds the result of the dma_map_sg call as stated in include/linux/scatterlist.h. Adapt the code to obey those rules. Signed-off-by: Marek Szyprowski --- drivers/media/pci/cx23885/cx23885-alsa.c | 2 +- drivers/media/pci/cx25821/cx25821-alsa.c | 2 +- drivers/media/pci/cx88/cx88-alsa.c | 2 +- drivers/media/pci/saa7134/saa7134-alsa.c | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/media/pci/cx23885/cx23885-alsa.c b/drivers/media/pci/cx23885/cx23885-alsa.c index df44ed7393a0..3f366e4e4685 100644 --- a/drivers/media/pci/cx23885/cx23885-alsa.c +++ b/drivers/media/pci/cx23885/cx23885-alsa.c @@ -129,7 +129,7 @@ static int cx23885_alsa_dma_unmap(struct cx23885_audio_dev *dev) if (!buf->sglen) return 0; - dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, PCI_DMA_FROMDEVICE); + dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, PCI_DMA_FROMDEVICE); buf->sglen = 0; return 0; } diff --git a/drivers/media/pci/cx25821/cx25821-alsa.c b/drivers/media/pci/cx25821/cx25821-alsa.c index 301616426d8a..c40304d33776 100644 --- a/drivers/media/pci/cx25821/cx25821-alsa.c +++ b/drivers/media/pci/cx25821/cx25821-alsa.c @@ -193,7 +193,7 @@ static int cx25821_alsa_dma_unmap(struct cx25821_audio_dev *dev) if (!buf->sglen) return 0; - dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, PCI_DMA_FROMDEVICE); + dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, PCI_DMA_FROMDEVICE); buf->sglen = 0; return 0; } diff --git a/drivers/media/pci/cx88/cx88-alsa.c b/drivers/media/pci/cx88/cx88-alsa.c index 7d7aceecc985..3c6fe6ceb0b7 100644 --- a/drivers/media/pci/cx88/cx88-alsa.c +++ b/drivers/media/pci/cx88/cx88-alsa.c @@ -332,7 +332,7 @@ static int cx88_alsa_dma_unmap(struct cx88_audio_dev *dev) if (!buf->sglen) return 0; - dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, + dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, PCI_DMA_FROMDEVICE); buf->sglen = 0; return 0; diff --git a/drivers/media/pci/saa7134/saa7134-alsa.c b/drivers/media/pci/saa7134/saa7134-alsa.c index 544ca57eee75..398c47ff473d 100644 --- a/drivers/media/pci/saa7134/saa7134-alsa.c +++ b/drivers/media/pci/saa7134/saa7134-alsa.c @@ -313,7 +313,7 @@ static int saa7134_alsa_dma_unmap(struct saa7134_dev *dev) if (!dma->sglen) return 0; - dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->sglen, PCI_DMA_FROMDEVICE); + dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->nr_pages, PCI_DMA_FROMDEVICE); dma->sglen = 0; return 0; } From patchwork Thu Jun 18 15:39:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11612583 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BFE7114E3 for ; Thu, 18 Jun 2020 15:41:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 99B2B208B3 for ; Thu, 18 Jun 2020 15:41:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="qc9xM290" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731794AbgFRPlY (ORCPT ); Thu, 18 Jun 2020 11:41:24 -0400 Received: from mailout1.w1.samsung.com ([210.118.77.11]:55002 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731664AbgFRPk4 (ORCPT ); Thu, 18 Jun 2020 11:40:56 -0400 Received: from eucas1p1.samsung.com (unknown [182.198.249.206]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200618154039euoutp01a64c329269f89f2347a9dee3b92ff620~ZrZ56S_kw1844218442euoutp01V for ; Thu, 18 Jun 2020 15:40:39 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200618154039euoutp01a64c329269f89f2347a9dee3b92ff620~ZrZ56S_kw1844218442euoutp01V DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1592494839; bh=bUR0gkYnHY2yGJNGlfsLKjT3FPrFZZ3Z2LsLuxLZIzE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qc9xM290EInWEc6qOa+aAiUjmqO3epRnOrc6nSHKgDev3t4LN1k4W5tu8cp34nabm EbLBhXwwEgR9vg3caaX12Yd3RRi4t14YhzqOP3rbft79xPrudkTSZkrvLVsHu3/DMa hYK4ZgDNP7wl2mquyDG44tghLtdaOQJWPJflaL9w= Received: from eusmges3new.samsung.com (unknown [203.254.199.245]) by eucas1p2.samsung.com (KnoxPortal) with ESMTP id 20200618154039eucas1p27f22f2881645b0769b94b16a5159f94d~ZrZ5oBFp40608806088eucas1p20; Thu, 18 Jun 2020 15:40:39 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges3new.samsung.com (EUCPMTA) with SMTP id 61.70.60698.6FA8BEE5; Thu, 18 Jun 2020 16:40:38 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20200618154038eucas1p1acd4fcdd183de4c19c4004778527a755~ZrZ5UdJYA1545815458eucas1p1o; Thu, 18 Jun 2020 15:40:38 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200618154038eusmtrp12e800f642df656361881d213119aff1b~ZrZ5Ty4wZ2230622306eusmtrp1W; Thu, 18 Jun 2020 15:40:38 +0000 (GMT) X-AuditID: cbfec7f5-a0fff7000001ed1a-54-5eeb8af69cde Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 76.F9.07950.6FA8BEE5; Thu, 18 Jun 2020 16:40:38 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200618154038eusmtip19632174da7f25d0e928d6533f76216c7~ZrZ4ojlkT0833608336eusmtip1V; Thu, 18 Jun 2020 15:40:38 +0000 (GMT) From: Marek Szyprowski To: dri-devel@lists.freedesktop.org, iommu@lists.linux-foundation.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org Cc: Marek Szyprowski , Christoph Hellwig , Robin Murphy , Bartlomiej Zolnierkiewicz , linux-arm-kernel@lists.infradead.org, David Airlie , Daniel Vetter , Pawel Osciak , Mauro Carvalho Chehab , Hans Verkuil , linux-media@vger.kernel.org Subject: [PATCH v6 35/36] videobuf2: use sgtable-based scatterlist wrappers Date: Thu, 18 Jun 2020 17:39:56 +0200 Message-Id: <20200618153956.29558-36-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618153956.29558-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSfSxVYRzuPeeec8+9uXW6bN6htLtVqy0y2s7GRMXO1h+ppbU+cOPsMp/d g6g/ssR0XUYUSTGZb7ldopFEcUXdiBpJiLXrW7vubczIcaj/nt/z/J49z+/dS6DSLsyGCImI ZpQR8jAZLhbUdyzpD5tV035HFtvdqDT9e4R6nluDUWv1mSjVb5rHqfLKdoTqfTgsoApbXKnF /jGE0o5/xai+xnycUmteYFT1u2EhVaJdQajs2SUh1bowgXnspKueVAG62VwooLUVd3G6wTyK 0SOpOoSuLb5FD62Oo3TWQCmgmwYTcHp8eRKn0+sqAG3U7qG7TEahj+Si2C2ICQuJZZSO7gHi 4Lo7TVjU4zNxmYNvsQRQc0IFRAQkXWBxeg+iAmJCSpYBWNo/gfPDIoDjw29QfjACaNIX4FuW 0aFZAS+UAvjDYEA4YcNyf8aDwzjpBFWzqg2DFZkEYGeaBYdRsgaFRVUkhy3JU/CVqVfIYQG5 D36YasU4LCHdYbN5ZjPMHlZquBYiQrTOd+uSMC4Ykj+FUFOWg/JLJ2FnKm+GpCWc0tUJeWwH u7PUAt6QCOCYvlrID2oA+27nAn7LFX7XL6/HEev1DsKaRkee9oSGri8oR0NyBxyY3cUfsAPe q8/ZpCUwJVnKb++Hebpn/2Jbez5vVqPh4iezkH+sTADzH7ShGcA+739YIQAVwJqJYcMVDOsc wVx3YOXhbEyEwiEwMlwL1n9Y96rO9BK8XrnaBkgCyCwkhnPTflJMHsvGh7cBSKAyK8nxj91+ UkmQPP4Go4z0V8aEMWwbsCUEMmuJc9HkFSmpkEczoQwTxSi3VIQQ2SQAu8Cg6NSGuaXta1bO GeLzjnp1cHCKZvqaxne+ExObygfYuJLQZH3OseUDigxRbs82URwYS3Qe7Ajx81ww7vVHjK4t BbWI+GbcJR8W9QLFj5xqn9p7H+2w/TZy+QJ6einAxScxg7I/W9ArBnO/e3u8s2ki0Xd385+W X/Neah+ZgA2WOx1Claz8LxjfRMVdAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrLIsWRmVeSWpSXmKPExsVy+t/xu7rful7HGZzepmvRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMllcnHmXxWLBfmuLL1ceMllsenyN1eLyrjlsFj0btrJarD1yl91i 2aY/TBZT3v5ktzj44QmrA7/HmnlrGD32flvA4rFpVSebx/ZvD1g97ncfZ/LYvKTe4/a/x8we k28sZ/TYfbOBzePxr5dsHn1bVjF6fN4k53Hq62f2AN4oPZui/NKSVIWM/OISW6VoQwsjPUNL Cz0jE0s9Q2PzWCsjUyV9O5uU1JzMstQifbsEvYwtLbtZC+YGVky8eZi1gXG9cxcjJ4eEgInE g9tvWboYuTiEBJYySmy79JwFIiEjcXJaAyuELSzx51oXG0TRJ6Cin8/ZQRJsAoYSXW8hEiIC nYwS07o/soM4zAI7mSX2337KCFIlLOAtsefrRbAOFgFViTOvDoKN5RWwk9j77Q0bxAp5idUb DjCD2JxA8dPHW8FqhARsJZ5/aGObwMi3gJFhFaNIamlxbnpusZFecWJucWleul5yfu4mRmBU bTv2c8sOxq53wYcYBTgYlXh4X4S8jhNiTSwrrsw9xCjBwawkwut09nScEG9KYmVValF+fFFp TmrxIUZToKMmMkuJJucDIz6vJN7Q1NDcwtLQ3Njc2MxCSZy3Q+BgjJBAemJJanZqakFqEUwf EwenVAPjjl8WdSqe5595zjmo+Enw/Pe537TWvbJ7HvXl0bednWmh3OHLm9tSMyKe+WyW36Gm Y9gXZ/rh7gxNBpEtEwzllrMeW3dCakl9z/VSZZX8aYzhqmf9NphnHOq8dcfyRHOJq5Xxn5fK 3/5ve6HgdUj62e6UH8/VQsUWuDXbLnF7/TLiwYq/YlcUlFiKMxINtZiLihMB19SdncACAAA= X-CMS-MailID: 20200618154038eucas1p1acd4fcdd183de4c19c4004778527a755 X-Msg-Generator: CA X-RootMTR: 20200618154038eucas1p1acd4fcdd183de4c19c4004778527a755 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200618154038eucas1p1acd4fcdd183de4c19c4004778527a755 References: <20200618153956.29558-1-m.szyprowski@samsung.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Use recently introduced common wrappers operating directly on the struct sg_table objects and scatterlist page iterators to make the code a bit more compact, robust, easier to follow and copy/paste safe. No functional change, because the code already properly did all the scaterlist related calls. Signed-off-by: Marek Szyprowski --- .../common/videobuf2/videobuf2-dma-contig.c | 41 ++++++++----------- .../media/common/videobuf2/videobuf2-dma-sg.c | 32 ++++++--------- .../common/videobuf2/videobuf2-vmalloc.c | 12 ++---- 3 files changed, 34 insertions(+), 51 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c index f4b4a7c135eb..ba01a8692d88 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c @@ -48,16 +48,15 @@ struct vb2_dc_buf { static unsigned long vb2_dc_get_contiguous_size(struct sg_table *sgt) { - struct scatterlist *s; dma_addr_t expected = sg_dma_address(sgt->sgl); - unsigned int i; + struct sg_dma_page_iter dma_iter; unsigned long size = 0; - for_each_sg(sgt->sgl, s, sgt->nents, i) { - if (sg_dma_address(s) != expected) + for_each_sgtable_dma_page(sgt, &dma_iter, 0) { + if (sg_page_iter_dma_address(&dma_iter) != expected) break; - expected = sg_dma_address(s) + sg_dma_len(s); - size += sg_dma_len(s); + expected += PAGE_SIZE; + size += PAGE_SIZE; } return size; } @@ -99,8 +98,7 @@ static void vb2_dc_prepare(void *buf_priv) if (!sgt || buf->db_attach) return; - dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->orig_nents, - buf->dma_dir); + dma_sync_sgtable_for_device(buf->dev, sgt, buf->dma_dir); } static void vb2_dc_finish(void *buf_priv) @@ -112,7 +110,7 @@ static void vb2_dc_finish(void *buf_priv) if (!sgt || buf->db_attach) return; - dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir); + dma_sync_sgtable_for_cpu(buf->dev, sgt, buf->dma_dir); } /*********************************************/ @@ -273,8 +271,8 @@ static void vb2_dc_dmabuf_ops_detach(struct dma_buf *dbuf, * memory locations do not require any explicit cache * maintenance prior or after being used by the device. */ - dma_unmap_sg_attrs(db_attach->dev, sgt->sgl, sgt->orig_nents, - attach->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable(db_attach->dev, sgt, attach->dma_dir, + DMA_ATTR_SKIP_CPU_SYNC); sg_free_table(sgt); kfree(attach); db_attach->priv = NULL; @@ -299,8 +297,8 @@ static struct sg_table *vb2_dc_dmabuf_ops_map( /* release any previous cache */ if (attach->dma_dir != DMA_NONE) { - dma_unmap_sg_attrs(db_attach->dev, sgt->sgl, sgt->orig_nents, - attach->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable(db_attach->dev, sgt, attach->dma_dir, + DMA_ATTR_SKIP_CPU_SYNC); attach->dma_dir = DMA_NONE; } @@ -308,9 +306,8 @@ static struct sg_table *vb2_dc_dmabuf_ops_map( * mapping to the client with new direction, no cache sync * required see comment in vb2_dc_dmabuf_ops_detach() */ - sgt->nents = dma_map_sg_attrs(db_attach->dev, sgt->sgl, sgt->orig_nents, - dma_dir, DMA_ATTR_SKIP_CPU_SYNC); - if (!sgt->nents) { + if (dma_map_sgtable(db_attach->dev, sgt, dma_dir, + DMA_ATTR_SKIP_CPU_SYNC)) { pr_err("failed to map scatterlist\n"); mutex_unlock(lock); return ERR_PTR(-EIO); @@ -423,8 +420,8 @@ static void vb2_dc_put_userptr(void *buf_priv) * No need to sync to CPU, it's already synced to the CPU * since the finish() memop will have been called before this. */ - dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents, - buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable(buf->dev, sgt, buf->dma_dir, + DMA_ATTR_SKIP_CPU_SYNC); pages = frame_vector_pages(buf->vec); /* sgt should exist only if vector contains pages... */ BUG_ON(IS_ERR(pages)); @@ -521,9 +518,8 @@ static void *vb2_dc_get_userptr(struct device *dev, unsigned long vaddr, * No need to sync to the device, this will happen later when the * prepare() memop is called. */ - sgt->nents = dma_map_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents, - buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); - if (sgt->nents <= 0) { + if (dma_map_sgtable(buf->dev, sgt, buf->dma_dir, + DMA_ATTR_SKIP_CPU_SYNC)) { pr_err("failed to map scatterlist\n"); ret = -EIO; goto fail_sgt_init; @@ -545,8 +541,7 @@ static void *vb2_dc_get_userptr(struct device *dev, unsigned long vaddr, return buf; fail_map_sg: - dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents, - buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable(buf->dev, sgt, buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); fail_sgt_init: sg_free_table(sgt); diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c index 92072a08af25..6ddf953efa11 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c @@ -142,9 +142,8 @@ static void *vb2_dma_sg_alloc(struct device *dev, unsigned long dma_attrs, * No need to sync to the device, this will happen later when the * prepare() memop is called. */ - sgt->nents = dma_map_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents, - buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); - if (!sgt->nents) + if (dma_map_sgtable(buf->dev, sgt, buf->dma_dir, + DMA_ATTR_SKIP_CPU_SYNC)) { goto fail_map; buf->handler.refcount = &buf->refcount; @@ -180,8 +179,8 @@ static void vb2_dma_sg_put(void *buf_priv) if (refcount_dec_and_test(&buf->refcount)) { dprintk(1, "%s: Freeing buffer of %d pages\n", __func__, buf->num_pages); - dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents, - buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable(buf->dev, sgt, buf->dma_dir, + DMA_ATTR_SKIP_CPU_SYNC); if (buf->vaddr) vm_unmap_ram(buf->vaddr, buf->num_pages); sg_free_table(buf->dma_sgt); @@ -202,8 +201,7 @@ static void vb2_dma_sg_prepare(void *buf_priv) if (buf->db_attach) return; - dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->orig_nents, - buf->dma_dir); + dma_sync_sgtable_for_device(buf->dev, sgt, buf->dma_dir); } static void vb2_dma_sg_finish(void *buf_priv) @@ -215,7 +213,7 @@ static void vb2_dma_sg_finish(void *buf_priv) if (buf->db_attach) return; - dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir); + dma_sync_sgtable_for_cpu(buf->dev, sgt, buf->dma_dir); } static void *vb2_dma_sg_get_userptr(struct device *dev, unsigned long vaddr, @@ -258,9 +256,8 @@ static void *vb2_dma_sg_get_userptr(struct device *dev, unsigned long vaddr, * No need to sync to the device, this will happen later when the * prepare() memop is called. */ - sgt->nents = dma_map_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents, - buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); - if (!sgt->nents) + if (dma_map_sgtable(buf->dev, sgt, buf->dma_dir, + DMA_ATTR_SKIP_CPU_SYNC)) { goto userptr_fail_map; return buf; @@ -286,8 +283,7 @@ static void vb2_dma_sg_put_userptr(void *buf_priv) dprintk(1, "%s: Releasing userspace buffer of %d pages\n", __func__, buf->num_pages); - dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir, - DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable(buf->dev, sgt, buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); if (buf->vaddr) vm_unmap_ram(buf->vaddr, buf->num_pages); sg_free_table(buf->dma_sgt); @@ -410,8 +406,7 @@ static void vb2_dma_sg_dmabuf_ops_detach(struct dma_buf *dbuf, /* release the scatterlist cache */ if (attach->dma_dir != DMA_NONE) - dma_unmap_sg(db_attach->dev, sgt->sgl, sgt->orig_nents, - attach->dma_dir); + dma_unmap_sgtable(db_attach->dev, sgt, attach->dma_dir); sg_free_table(sgt); kfree(attach); db_attach->priv = NULL; @@ -436,15 +431,12 @@ static struct sg_table *vb2_dma_sg_dmabuf_ops_map( /* release any previous cache */ if (attach->dma_dir != DMA_NONE) { - dma_unmap_sg(db_attach->dev, sgt->sgl, sgt->orig_nents, - attach->dma_dir); + dma_unmap_sgtable(db_attach->dev, sgt, attach->dma_dir); attach->dma_dir = DMA_NONE; } /* mapping to the client with new direction */ - sgt->nents = dma_map_sg(db_attach->dev, sgt->sgl, sgt->orig_nents, - dma_dir); - if (!sgt->nents) { + if (dma_map_sgtable(db_attach->dev, sgt, dma_dir, 0)) { pr_err("failed to map scatterlist\n"); mutex_unlock(lock); return ERR_PTR(-EIO); diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c index c66fda4a65e4..bf5ac63a5742 100644 --- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c +++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c @@ -229,7 +229,7 @@ static int vb2_vmalloc_dmabuf_ops_attach(struct dma_buf *dbuf, kfree(attach); return ret; } - for_each_sg(sgt->sgl, sg, sgt->nents, i) { + for_each_sgtable_sg(sgt, sg, i) { struct page *page = vmalloc_to_page(vaddr); if (!page) { @@ -259,8 +259,7 @@ static void vb2_vmalloc_dmabuf_ops_detach(struct dma_buf *dbuf, /* release the scatterlist cache */ if (attach->dma_dir != DMA_NONE) - dma_unmap_sg(db_attach->dev, sgt->sgl, sgt->orig_nents, - attach->dma_dir); + dma_unmap_sgtable(db_attach->dev, sgt, attach->dma_dir, 0); sg_free_table(sgt); kfree(attach); db_attach->priv = NULL; @@ -285,15 +284,12 @@ static struct sg_table *vb2_vmalloc_dmabuf_ops_map( /* release any previous cache */ if (attach->dma_dir != DMA_NONE) { - dma_unmap_sg(db_attach->dev, sgt->sgl, sgt->orig_nents, - attach->dma_dir); + dma_unmap_sgtable(db_attach->dev, sgt, attach->dma_dir, 0); attach->dma_dir = DMA_NONE; } /* mapping to the client with new direction */ - sgt->nents = dma_map_sg(db_attach->dev, sgt->sgl, sgt->orig_nents, - dma_dir); - if (!sgt->nents) { + if (dma_map_sgtable(db_attach->dev, sgt, dma_dir, 0)) { pr_err("failed to map scatterlist\n"); mutex_unlock(lock); return ERR_PTR(-EIO);