From patchwork Tue May 12 09:00:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11542725 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 3CF0F912 for ; Tue, 12 May 2020 09:11:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D39BD20575 for ; Tue, 12 May 2020 09:11:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ZLYnjAXN"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="DVFT3l2s" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D39BD20575 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=samsung.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=AF0Qe8kaWUK4ayj6aFFRgtYT3pGhx+1WjYb72SeEG9k=; b=ZLYnjAXNyouJYz3rWhe/zplL8S 8hYreMj+pPuTYDpEFFiEhv3xpe132ACgf5LFazmpgH78Q5ftC9gUKHvfwQBjtTsFyHSwEUox8tJ88 9lPDi7sKrsGjyNlSC0vJPuQExPGFiGH4Uq6xet2+U3BuYfFXNypE2i9ca99+GWXBNWXzmRPNJfzqI mjvKYkaJkKAtTKMRrflXNkA1EdZz9q1n45RYhFrmU1wic0sUpsjoq3Gp5hzC9t+Djik3owYquymr+ BsJO81QYZjuWu4nbSjsslwgvoFnlkTAKrvwDbbVqY8gLG460jQONake22E2si8l1vzU2Sfvu0+pLG Kd6D566g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYQwT-0003bc-Ec; Tue, 12 May 2020 09:11:13 +0000 Received: from mailout1.w1.samsung.com ([210.118.77.11]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYQn0-0002Lo-IG for linux-rockchip@lists.infradead.org; Tue, 12 May 2020 09:01:34 +0000 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200512090120euoutp01e1d7eb10534bbf23adfc8f5be3bb0bea~OPFsCWeFS2633726337euoutp01U for ; Tue, 12 May 2020 09:01:20 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200512090120euoutp01e1d7eb10534bbf23adfc8f5be3bb0bea~OPFsCWeFS2633726337euoutp01U DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1589274080; bh=8RXUaYJ0XAx8gHgVoRx7PyyDslr7uCrC5/8lRvvZF0w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DVFT3l2sUuKwchTEywUkN78aEJqU+u8VmoNkiTfGpAeSVBn+EX4SvIWVUcI1FuU1q uToIQr59EsBaTgoYi5xuDpTn7Xn1ss5I4+0UKOcVBUpiVtc34OfG3F74mQstH12xm/ VDcgQKudTE/PLqSqbpnmBsA0Nyo3SC4oST7FXtTw= Received: from eusmges2new.samsung.com (unknown [203.254.199.244]) by eucas1p1.samsung.com (KnoxPortal) with ESMTP id 20200512090119eucas1p122c54f3d790a8b4aabadddef138cb482~OPFr3VH7q1613916139eucas1p1j; Tue, 12 May 2020 09:01:19 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges2new.samsung.com (EUCPMTA) with SMTP id BD.22.60679.FD56ABE5; Tue, 12 May 2020 10:01:19 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20200512090119eucas1p2b3e1a858d8893f8d209d5c19fcbab941~OPFrnFDm92669826698eucas1p2a; Tue, 12 May 2020 09:01:19 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200512090119eusmtrp135da908616aff3d712df2ee287b888a2~OPFrmVeew0188101881eusmtrp1P; Tue, 12 May 2020 09:01:19 +0000 (GMT) X-AuditID: cbfec7f4-0e5ff7000001ed07-b6-5eba65dfb313 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 9D.F2.07950.FD56ABE5; Tue, 12 May 2020 10:01:19 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200512090118eusmtip1b5259b1f4905ccb99e71fb00c788aaf8~OPFrBXLlK1352813528eusmtip1K; Tue, 12 May 2020 09:01:18 +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 Subject: [PATCH v4 21/38] drm: rockchip: use common helper for a scatterlist contiguity check Date: Tue, 12 May 2020 11:00:41 +0200 Message-Id: <20200512090058.14910-21-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200512090058.14910-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSfyyUcRjf99778d5x9nZsvqNlu8WWys9qb2lUS73/WP1RS1l0eIdy6F6U yphiuZxxSjpCWDg/k9BdhROnNNMdxqr5Ve0oY/mVuk53Xum/z+fzPJ/n8+zZgyICNcsBjYqJ JyUxomghm8ds6Vnt3z1GqoI9mjR7cVn/Gwb+pKCBha+15CL44NIcG6+u6Wbga5PfWPhDeTJe 2u6DLw5OMPCmqWEWrlcVsfEf42sIXvf6EwfvnP/MOmRD1BbXAuLlcimTaF0eZxFjd7QM4mlF CvHBNIUQeSOVgFCPprKJP4p2JpHdrARE63AxQiw0bTtpfY53MJyMjkokJe6+F3iR+e0mVlya zdXeag07FXy1kgIUhdgemFlyQgp4qACrAvBneRegySKARTOZZsI1kwUA27JTLNhiKF7tYtB6 JYCj38lNQ7l+GbEU2JgnlM5K2RZsh6UD2CuztmAEy0egcumYBdtiITCjam19EBNzhoaMwvV+ PuYLH+SqGXSYE6xp7FifyTXrYyVGpiUMYjoOND2rAXTTUWhsNCI0toUz2mYOjbfCvrysDcNN ACf66zg0yQJQn1aw4faBH/t/sS3HQLAdsEHlTt/lMFztc6KhDRyZ3ULvbwPlLfcRWubD2xkC eoYLVGjrN1M7B3Qb2xBwQE7rAqwbQMUQmQOcFP+jSgFQAnsygRJHkJRXDHnFjRKJqYSYCLew WHETML9Un0m72AZUxlANwFAgtOZ7eDwPFrBEiVSSWAMgigjt+LeizBI/XJR0jZTEhkgSoklK AxxRptCe7102fV6ARYjiyUskGUdK/lUZKNchFVQF9HBBYJDjfPj7fXHGL69eFIbHhxq8duWY PORvG8kjsoBQRZhB7u2m1OquW7XJjHyJzgdVlJ85na87bph85FKm11WkrVw86zrXEbxze9C7 zup7Q+p0v3Qq0KQ/5XAgNTelXqvb73CZWcrtSF656z99Q+UcNqsx5HJ++6sf+wmZVKTI0xWR UKK/MYuwBU4DAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrIIsWRmVeSWpSXmKPExsVy+t/xu7r3U3fFGaz5rmTRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMln8f/Sa1WLupFqLBfutLb5cechksenxNVaLy7vmsFl8evCf2WLt kbvsFgc/PGF14PNYM28No8febwtYPLZ/e8Dqcb/7OJPH5iX1Hrf/PWb2mHxjOaPH7psNbB5/ Z+1n8ejbsorRY/u1ecwenzfJBfBE6dkU5ZeWpCpk5BeX2CpFG1oY6RlaWugZmVjqGRqbx1oZ mSrp29mkpOZklqUW6dsl6GVM2/+PtaCJr+LEykNsDYzPuLsYOTkkBEwk5v08zNTFyMUhJLCU UeJE+wtmiISMxMlpDawQtrDEn2tdbBBFnxgl3r46xASSYBMwlOh6C5EQEehklJjW/ZEdxGEW mMcssXwVyFwODmGBWIlp+8VAGlgEVCVetM1mA7F5BewkZk7czQSxQV5i9YYDYJs5geL35/9h AbGFBAolHl19yzKBkW8BI8MqRpHU0uLc9NxiI73ixNzi0rx0veT83E2MwOjZduznlh2MXe+C DzEKcDAq8fB2GO2ME2JNLCuuzD3EKMHBrCTC25IJFOJNSaysSi3Kjy8qzUktPsRoCnTURGYp 0eR8YGTnlcQbmhqaW1gamhubG5tZKInzdggcjBESSE8sSc1OTS1ILYLpY+LglGpgzE+af6hN WeHmxk8nb0sYL7Ve43Cq8irTpCe7Nec5z4/xEAi6fXZX61M50cqr6aL/t/w7+7xuhsetfiGh CdwdT086rNYQzlsndFR0g5FXg/KroKVVrloGK+Ym213Lmft0suoSQZtlDe/WNVZ1tApmiOy8 epjVRHPDYQ/XORd/vdctMG6w2+4WqMRSnJFoqMVcVJwIAJ5cyOe0AgAA X-CMS-MailID: 20200512090119eucas1p2b3e1a858d8893f8d209d5c19fcbab941 X-Msg-Generator: CA X-RootMTR: 20200512090119eucas1p2b3e1a858d8893f8d209d5c19fcbab941 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200512090119eucas1p2b3e1a858d8893f8d209d5c19fcbab941 References: <20200512085710.14688-1-m.szyprowski@samsung.com> <20200512090058.14910-1-m.szyprowski@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200512_020127_059392_DE7C7194 X-CRM114-Status: GOOD ( 12.45 ) X-Spam-Score: -5.4 (-----) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-5.4 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [210.118.77.11 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [210.118.77.11 listed in wl.mailspike.net] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders -0.2 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Heiko_St=C3=BCbner?= , Bartlomiej Zolnierkiewicz , David Airlie , Sandy Huang , linux-rockchip@lists.infradead.org, Daniel Vetter , Robin Murphy , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, Marek Szyprowski MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org Use common helper for checking the contiguity of the imported dma-buf. Signed-off-by: Marek Szyprowski --- For more information, see '[PATCH v4 00/38] DRM: fix struct sg_table nents vs. orig_nents misuse' thread: https://lore.kernel.org/dri-devel/20200512085710.14688-1-m.szyprowski@samsung.com/T/ --- drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 19 +------------------ 1 file changed, 1 insertion(+), 18 deletions(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c index 0d18846..21f8cb2 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c @@ -460,23 +460,6 @@ struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj) return sgt; } -static unsigned long rockchip_sg_get_contiguous_size(struct sg_table *sgt, - int count) -{ - struct scatterlist *s; - dma_addr_t expected = sg_dma_address(sgt->sgl); - unsigned int i; - unsigned long size = 0; - - for_each_sg(sgt->sgl, s, count, i) { - if (sg_dma_address(s) != expected) - break; - expected = sg_dma_address(s) + sg_dma_len(s); - size += sg_dma_len(s); - } - return size; -} - static int rockchip_gem_iommu_map_sg(struct drm_device *drm, struct dma_buf_attachment *attach, @@ -498,7 +481,7 @@ static unsigned long rockchip_sg_get_contiguous_size(struct sg_table *sgt, if (!count) return -EINVAL; - if (rockchip_sg_get_contiguous_size(sg, count) < attach->dmabuf->size) { + if (drm_prime_get_contiguous_size(sg) < attach->dmabuf->size) { DRM_ERROR("failed to map sg_table to contiguous linear address.\n"); dma_unmap_sg(drm->dev, sg->sgl, sg->nents, DMA_BIDIRECTIONAL); From patchwork Tue May 12 09:00:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11542717 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 B253A912 for ; Tue, 12 May 2020 09:10:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6CDBE20575 for ; Tue, 12 May 2020 09:10:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Z6EXxxgz"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="lUT25f89"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="R9CeSKN+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6CDBE20575 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=samsung.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=lbg93HZBSfmSyvjKTRmiWTxaa5O/1ub1NQz8P8NqEhc=; b=Z6EXxxgzoG4WStUnxxHO5xc6e4 1hT+qvP0WS/Vg1YYzKEJjX+HUV7uafy7LlLAfsOlabtaiuF4j6P0TqMD5Ml5CjDDbMiOmK0E5TsI7 8/USsKXa9/eiENS5RRL4sks8NmBwIqig4gonzBKjuFLVRFPoniyzxP5/5QtNduvJMwwNaSO3Jz5F6 Guj5GfjdoF8hdRqUnoW+5hnE1++Ew+j3Q0EgHrHpW4qWDCHTxiB5JQNxyFK7D22j90CykBDuyiKoQ XBlBl5zc23j0MRS4BhBX3Clfwj0RW1w1X9Il0SHXm6wU7+BssTCFAOZvij9v6V8ZxpQX/BTpvdeKy A3CnB9Ug==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYQvc-0002pA-Tz; Tue, 12 May 2020 09:10:20 +0000 Received: from merlin.infradead.org ([205.233.59.134]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYQn5-0002Qn-Cj for linux-rockchip@bombadil.infradead.org; Tue, 12 May 2020 09:01:31 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=References:Content-Type:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version: Content-Transfer-Encoding:Content-ID:Content-Description; bh=H5Wuqd3IhdfxTrxlIPJVjW9wUYL7V9eCxWvieLv/Ae4=; b=lUT25f89iS50fcMQoxyW09Ca/u rIYVNYFYUlIVO7fxcGTbuwemehhcvFJv5+d77PraWxpoflaaWDsbrYuXXjwM5mAIYRpHNFpYsHdX/ 4E+XGXXbxVO0id6NVvX4sUZykLtXWcwBe16W43qZdup2Eezks0DFA5LYmYg+lxja1ctXX1BAO8r5F etdbwJzJRMrPS99IuNOHiN5r5+SvvSnDNwoG1ox+JVJIfUbpWxd2zmXpC6wrWBxQslJ0k/eFYX2BM irMFPQvGEB+z3dhCHskXbvUNA3UgSGgm3hLENL+QiOEU9vFyNs3Q74IJBF5CG6i6V2buM8Wos0tce qwJY4SQA==; Received: from mailout1.w1.samsung.com ([210.118.77.11]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYQn0-0004V1-RT for linux-rockchip@lists.infradead.org; Tue, 12 May 2020 09:01:29 +0000 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200512090120euoutp01f651655130e3b244549f38d2098c91c9~OPFs4Ezsv2629726297euoutp01c for ; Tue, 12 May 2020 09:01:20 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200512090120euoutp01f651655130e3b244549f38d2098c91c9~OPFs4Ezsv2629726297euoutp01c DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1589274081; bh=H5Wuqd3IhdfxTrxlIPJVjW9wUYL7V9eCxWvieLv/Ae4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R9CeSKN+j/iwONFgOglNAtnffcLX3BSDXooZFe5rmzT56T+/KvRCA8lXas+5ngrJC H//g+LIEKMf9+rADffB+akKoK3H9TERMZkxbr3rMdYxC17josuUiEtNFD71YxtZ8xg 4dPNeCeMcadib6AfIr5cFjBw43HAgm9KjoxzkGnE= Received: from eusmges1new.samsung.com (unknown [203.254.199.242]) by eucas1p1.samsung.com (KnoxPortal) with ESMTP id 20200512090120eucas1p13ccfe06058a4a1cf34195a93eebcd2f4~OPFsj5kiE0080100801eucas1p1f; Tue, 12 May 2020 09:01:20 +0000 (GMT) Received: from eucas1p2.samsung.com ( [182.198.249.207]) by eusmges1new.samsung.com (EUCPMTA) with SMTP id 94.67.61286.0E56ABE5; Tue, 12 May 2020 10:01:20 +0100 (BST) Received: from eusmtrp2.samsung.com (unknown [182.198.249.139]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20200512090120eucas1p28cc382480b2e3298b59fb6bf5ffde80b~OPFsPfCnV2180321803eucas1p23; Tue, 12 May 2020 09:01:20 +0000 (GMT) Received: from eusmgms1.samsung.com (unknown [182.198.249.179]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20200512090120eusmtrp29e638fa3d1d94c26652cbc0f1b430c27~OPFsNe7ZW0472704727eusmtrp2M; Tue, 12 May 2020 09:01:20 +0000 (GMT) X-AuditID: cbfec7f2-f0bff7000001ef66-89-5eba65e014b4 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id 55.45.08375.0E56ABE5; Tue, 12 May 2020 10:01:20 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200512090119eusmtip101ec658c19ed9a44edfdfb44d4ca5c32~OPFrk7kXF1148011480eusmtip1Y; Tue, 12 May 2020 09:01:19 +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 Subject: [PATCH v4 22/38] drm: rockchip: fix common struct sg_table related issues Date: Tue, 12 May 2020 11:00:42 +0200 Message-Id: <20200512090058.14910-22-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200512090058.14910-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0WSa0hTcRjG+e9cdlxOTlvkq4XFYqWS1rIPJ5R1QeRAX4qEIMxaeVLJqWzT UghXmtlSMYsuo9LMKDXTZmy66GbpEmOWylKs1DSWpmXqFK22XKfLt9/zvO/L8/DnT2GSR0Qg lZyq4zSpqhQZKcLNrXMdYQOcNX79zWE5U2RvEzD3LtURjMd8FmO6XV9JpqqmRcB4PnwmmKul x5jyx5HMdPeggDENOQimy3qFZCYHPBhT+/ydkHk6MUxs8WPvXLuD2Icz5ThrmRkg2P4zNgHb UJnD9rmHMPZczy3EPujVk+xP42OcLb5fjViL4xrGTpmCdvjuEUUlcCnJmZxmnXK/KGnWbiPS R4OOWkoLhHrkCDAgHwrojXD6WQNmQCJKQt9GYM3v/COmERS/byJ5MYXAWdRD/D0ZrvmA84Nb CIbcn8h/JzdLcpF3i6QVYBg3kF5eQp9E8KLI18sYfQGDaleMl6V0LJh7OnAv47QcrEPXBQZE UWJaCc6XO/mwFVBT/wTzss+C3V/2A+f9TiF8KUznORrm+uoQz1IYtd0X8rwcPE1lAm83oHMR DNprhbwoRNB14tKfi0h4a58nvcEYHQJ11nW8vRW+O4y/+wDtBz3ji/n6flBqvojxthgK8iX8 9mow2u7+i336qhPjmYVRqwPxz9OCoH3YRpSgFcb/YeUIVSN/LkOrTuS0ilTuSLhWpdZmpCaG H0xTm9DCr2p32yYbkavzQDOiKSTzFRdsaIqXEKpMbZa6GQGFyZaI85IXLHGCKiub06Tt02Sk cNpmtIzCZf7iiIqRvRI6UaXjDnNcOqf5OxVQPoF61MidcVp6XwtGVs5lrUreUhISjI2dv6EY cxXU5s3N+G0edMdmNpyKnc03KXdX6+KYOI9826PKjbqlP6IKA5ir09JQfWv7rFKaG/EqeM18 /LeyRXuPF+qdHvmbjqTxqRTRBGQr6u/lh0345GwKW3v546Fdk66Y2sw2eYUDosuqtstwbZJK EYpptKpfn9yiw1EDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrAIsWRmVeSWpSXmKPExsVy+t/xu7oPUnfFGSz4x2XRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMln8f/Sa1WLupFqLBfutLb5cechksenxNVaLy7vmsFl8evCf2WLt kbvsFgc/PGF14PNYM28No8febwtYPLZ/e8Dqcb/7OJPH5iX1Hrf/PWb2mHxjOaPH7psNbB5/ Z+1n8ejbsorRY/u1ecwenzfJBfBE6dkU5ZeWpCpk5BeX2CpFG1oY6RlaWugZmVjqGRqbx1oZ mSrp29mkpOZklqUW6dsl6GV8P3ecteCVXMX2SR3sDYzXJLsYOTkkBEwknqx+xNLFyMUhJLCU UeLzxinMEAkZiZPTGlghbGGJP9e62CCKPjFKnGv6C5ZgEzCU6HoLkRAR6GSUmNb9kR3EYRaY xyyxfNVhpi5GDg5hgSCJ+fcSQRpYBFQldj1eCBbmFbCTeH4mEGKBvMTqDQfAFnMChe/P/8MC YgsJFEo8uvqWZQIj3wJGhlWMIqmlxbnpucWGesWJucWleel6yfm5mxiBsbPt2M/NOxgvbQw+ xCjAwajEw9thtDNOiDWxrLgy9xCjBAezkghvSyZQiDclsbIqtSg/vqg0J7X4EKMp0E0TmaVE k/OBcZ1XEm9oamhuYWlobmxubGahJM7bIXAwRkggPbEkNTs1tSC1CKaPiYNTqoFR3mK7hH6y yDou3nvVO7dMjXxgMccgubFYIZGDUVfj1T+LI2K9U9n+5bg/FFeX+stz9HGxlutr4YK8G3Oj ruyxqWZuKTUvW6qgwabn/df8dv2vFz3/BI5/ED33tjolW1r0fsF+VnHZOzI3Hk/5c/p8UJ/F D+OEuXlXNwVFGvO/Vk1+fkRyUocSS3FGoqEWc1FxIgCVrMwwswIAAA== X-CMS-MailID: 20200512090120eucas1p28cc382480b2e3298b59fb6bf5ffde80b X-Msg-Generator: CA X-RootMTR: 20200512090120eucas1p28cc382480b2e3298b59fb6bf5ffde80b X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200512090120eucas1p28cc382480b2e3298b59fb6bf5ffde80b References: <20200512085710.14688-1-m.szyprowski@samsung.com> <20200512090058.14910-1-m.szyprowski@samsung.com> X-Spam-Note: CRM114 invocation failed X-Spam-Score: -5.4 (-----) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-5.4 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [210.118.77.11 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [210.118.77.11 listed in wl.mailspike.net] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders -0.2 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Heiko_St=C3=BCbner?= , Bartlomiej Zolnierkiewicz , David Airlie , Sandy Huang , linux-rockchip@lists.infradead.org, Daniel Vetter , Robin Murphy , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, Marek Szyprowski MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.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 --- For more information, see '[PATCH v4 00/38] DRM: fix struct sg_table nents vs. orig_nents misuse' thread: https://lore.kernel.org/dri-devel/20200512085710.14688-1-m.szyprowski@samsung.com/T/ --- drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c index 21f8cb2..566557b 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c @@ -36,8 +36,8 @@ static int rockchip_gem_iommu_map(struct rockchip_gem_object *rk_obj) rk_obj->dma_addr = rk_obj->mm.start; - ret = iommu_map_sg(private->domain, rk_obj->dma_addr, rk_obj->sgt->sgl, - rk_obj->sgt->nents, prot); + ret = iommu_map_sgtable(private->domain, rk_obj->dma_addr, rk_obj->sgt, + prot); if (ret < rk_obj->base.size) { DRM_ERROR("failed to map buffer: size=%zd request_size=%zd\n", ret, rk_obj->base.size); @@ -98,11 +98,10 @@ static int rockchip_gem_get_pages(struct rockchip_gem_object *rk_obj) * TODO: Replace this by drm_clflush_sg() once it can be implemented * without relying on symbols that are not exported. */ - for_each_sg(rk_obj->sgt->sgl, s, rk_obj->sgt->nents, i) + for_each_sgtable_sg(rk_obj->sgt, s, i) sg_dma_address(s) = sg_phys(s); - dma_sync_sg_for_device(drm->dev, rk_obj->sgt->sgl, rk_obj->sgt->nents, - DMA_TO_DEVICE); + dma_sync_sgtable_for_device(drm->dev, rk_obj->sgt, DMA_TO_DEVICE); return 0; @@ -350,8 +349,8 @@ void rockchip_gem_free_object(struct drm_gem_object *obj) if (private->domain) { rockchip_gem_iommu_unmap(rk_obj); } else { - dma_unmap_sg(drm->dev, rk_obj->sgt->sgl, - rk_obj->sgt->nents, DMA_BIDIRECTIONAL); + dma_unmap_sgtable(drm->dev, rk_obj->sgt, + DMA_BIDIRECTIONAL, 0); } drm_prime_gem_destroy(obj, rk_obj->sgt); } else { @@ -476,15 +475,13 @@ struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj) struct sg_table *sg, struct rockchip_gem_object *rk_obj) { - int count = dma_map_sg(drm->dev, sg->sgl, sg->nents, - DMA_BIDIRECTIONAL); - if (!count) - return -EINVAL; + int err = dma_map_sgtable(drm->dev, sg, DMA_BIDIRECTIONAL, 0); + if (err) + return err; if (drm_prime_get_contiguous_size(sg) < attach->dmabuf->size) { DRM_ERROR("failed to map sg_table to contiguous linear address.\n"); - dma_unmap_sg(drm->dev, sg->sgl, sg->nents, - DMA_BIDIRECTIONAL); + dma_unmap_sgtable(drm->dev, sg, DMA_BIDIRECTIONAL, 0); return -EINVAL; }