From patchwork Wed Aug 26 06:33:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11737495 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 E970E722 for ; Wed, 26 Aug 2020 07:02:58 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 B530620767 for ; Wed, 26 Aug 2020 07:02:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="L8Mi+82o"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="UMJpfo3F"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="qjBX2sKE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B530620767 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-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.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=mbRsK4L9M9rNJHTRquypK3C6TMAZc5yFEmlqoZxRC1w=; b=L8Mi+82oawZfdvzvBpIK2h6Abd fWHYOiS26y/auGfQd7zY1FBty9YVa2ATSFu+qD9P6TMdBXhUSOOOSxUWKLd0oUIkfKTDjNYV+Dzt8 LEGAAFuqoO4mLTtQYYjhjp2VURqiG2MW/PYvU9WsTP8yldn+zWh8uIwT+zz8p+tYcoZYLJXg+zYtt 5huB4TfIepYhrD8+6NqJipm1c9RvW/3jx4J2iiuEXMwLJHdrJbFIwUhVvBDH35PjbpdkY+rhd608Q XIALjjBj2Ky2WKeb8zp7PqV4tfmzF2a1NuwpHfpp7eyu2Zi5S2dmv1b0ZT4i5Z5FocJ7G5XFlTtCt XnsbkFxg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kApSF-0004Vd-Fl; Wed, 26 Aug 2020 07:02:43 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kApR2-0003g9-2X for linux-arm-kernel@merlin.infradead.org; Wed, 26 Aug 2020 07:01:28 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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=uRyWiAszaWTmT9aEcwSkw+b3g8jzvTahdvI0hzE+vrU=; b=UMJpfo3FtYbJlORacxbL/OgQi3 HcgmHvaSEUrKuguG/CB50oOYJZWa83BeqjHKt9dy+tz/RAIyQAsqSP0A6AceKmKYVDXKLgaZzVVSz BLNzd8VPJOLW00Bz8cu7QifOA4TrG3tQHT8yqeJfXwr/9c+ohVxGZwyqH2/u+UrhszdIa1vx8Qq4t 5z9yj1CnB9ARqMNmxiflqz4ak3QrsrMrUqamNV7yWiB+beKENzQjN6pzy2/yP8+v1mUUHn71SRdiZ +g3pdC9LdZHQnWdG2A9X9p2sUGHde53o/qwyfKSrEdvpDN7Af4xnxKnXvhbKM5ODhyo2TQN6656bK /zihYLMg==; Received: from mailout2.w1.samsung.com ([210.118.77.12]) by casper.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kAp25-0001NA-Uj for linux-arm-kernel@lists.infradead.org; Wed, 26 Aug 2020 06:35:47 +0000 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout2.w1.samsung.com (KnoxPortal) with ESMTP id 20200826063538euoutp023511e58c21527a75861d849dcc222455~uvevY1Jop1511215112euoutp02W for ; Wed, 26 Aug 2020 06:35:38 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.w1.samsung.com 20200826063538euoutp023511e58c21527a75861d849dcc222455~uvevY1Jop1511215112euoutp02W DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1598423738; bh=uRyWiAszaWTmT9aEcwSkw+b3g8jzvTahdvI0hzE+vrU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qjBX2sKEANbpTjEELL+iw+WxvWe2nMTwKLP8c7kHJjy+Udhw8rrzUnnHnpUVWE+LK b0CE6aINQRrzZhIMOP9gqPEWh83uaxZs75zeQXw2ae9UPlgTqciN0hzstJgFSij2Mk /nPVjUg1AbZhjq/fPnZFQN/HazLdnHxDS5PmlyVI= Received: from eusmges2new.samsung.com (unknown [203.254.199.244]) by eucas1p1.samsung.com (KnoxPortal) with ESMTP id 20200826063538eucas1p130c03342b3f968e5ba15935b3d3b2846~uvevH9AAK1474114741eucas1p1j; Wed, 26 Aug 2020 06:35:38 +0000 (GMT) Received: from eucas1p2.samsung.com ( [182.198.249.207]) by eusmges2new.samsung.com (EUCPMTA) with SMTP id C0.BD.05997.AB2064F5; Wed, 26 Aug 2020 07:35:38 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20200826063537eucas1p2d9a362f619920ad84c46f36cd13ec362~uveu5z7t10402704027eucas1p2o; Wed, 26 Aug 2020 06:35:37 +0000 (GMT) Received: from eusmgms1.samsung.com (unknown [182.198.249.179]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200826063537eusmtrp18354272b9bd79ea9e0ab3346ae6d40a0~uveu5Khce1091110911eusmtrp1d; Wed, 26 Aug 2020 06:35:37 +0000 (GMT) X-AuditID: cbfec7f4-677ff7000000176d-d2-5f4602ba9b84 Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id 27.D0.06314.9B2064F5; Wed, 26 Aug 2020 07:35:37 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20200826063537eusmtip2377aced114f05b610537df16fe2b3f76~uveuVRx0Y0302303023eusmtip2z; Wed, 26 Aug 2020 06:35:37 +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 Subject: [PATCH v9 17/32] drm: rockchip: fix common struct sg_table related issues Date: Wed, 26 Aug 2020 08:33:01 +0200 Message-Id: <20200826063316.23486-18-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200826063316.23486-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0WSWUwTURSGuTOd6UAoGQrKDaKYJpCALKI8jNQQNUrmhciDT0bFIpNChEI6 gEKCIASXsklLhKASggjIIlsFUiTsFoOgyNYqSNmURYTIohAEKQP49p3//P89595cAhU2YbZE sCyCkcskISLcjFf7du2Dqwbx8T8+04ZTqT3vEKoquwKjtmozUKp/ZQGnXpZ2INTW+BxGPVPG UnlNYmq5fwyhqicGMapP8xSnfhm2UKq8fYRPtSxOYmcs6LLcMkA3rubx6LpVA0aPJmsRuqYg jv6yOYHSKl0RoBv08Tj9N6eJR6epSwBdN5iL0kvVR/zML5udDmRCgqMYubv3dbOgjiYlFp5+ +Hbi+DoWD1RQAUwJSHrC15lfcQUwI4RkMYDDdZUYVywDWKXpRYwuIbkE4FSW9V7ic0chwpmK AJxb+M3bT0xPPOcbXTjpARXzCtzI1mQSgJ2p5kZGyccoLFnxMbIVeQl+u2/Y8fNIB6jXVwAj C0hvOKAuwLlp9rC0shk1sum2rk1O39kVkoN8WL+WuWs6Dxt6NwDHVnBWq+ZzbAe7VCk8LpAI 4FhPOZ8rUgDsS8jeTYjhcM/69knE9npOsELjzslnYdrkBN8oQ9IC6uYtuQtYQGVtFsrJAvjg npBzO8Ic7av9sS0fP6Ec01CZqN19rQwAmyeHkEfAPuf/sDwASoANE8mGShn2hIy55cZKQtlI mdTtRlhoNdj+Vl2b2uV6oNkIaAUkAUTmgjz8gr8Qk0Sx0aGtABKoyFpwrrvrmlAQKImOYeRh /vLIEIZtBYcInshGcDJ/5qqQlEoimJsME87I97oIYWobD1IDlzvHqLhCIC2fVTocVVk3Tsmm D4hm786bBLjEyLxsTcJjY+vfDOTr3xe7Jn1v06U+8XooVXd5HbPTs+WW9qM1fkIH30VxwsFT P3VlYkWmxNHds0E1tHjxhVrc0KdoGRkIijfcaSvy1KW1G5y6XYdMDS7OvldwXXfkj8E/qyIe GyTxcEblrOQfAWXL91IDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrIIsWRmVeSWpSXmKPExsVy+t/xe7o7mdziDTY/NrHoPXeSyWLjjPWs Fv+3TWS2uPL1PZvFytVHmSz+P3rNajF3Uq3Fgv3WFl+uPGSy2PT4GqvF5V1z2Cw+PfjPbLH2 yF12i4MfnrA68HmsmbeG0WPvtwUsHtu/PWD1uN99nMlj85J6j9v/HjN7TL6xnNFj980GNo+/ s/azePRtWcXosf3aPGaPz5vkAnii9GyK8ktLUhUy8otLbJWiDS2M9AwtLfSMTCz1DI3NY62M TJX07WxSUnMyy1KL9O0S9DKO7p/EWtAvW9H86BdrA+NkiS5GTg4JAROJW0eXMXUxcnEICSxl lJhzYT8LREJG4uS0BlYIW1jiz7UuNhBbSOATo0T7ZE8Qm03AUKLrLUici0NEoJNRYlr3R3YQ h1lgHrPE8lWHmUCqhAWCJA5cmMUOYrMIqErcvLmeEcTmFbCTuLplCRvEBnmJ1RsOMIPYnEDx 4939UNtsJU6vncE8gZFvASPDKkaR1NLi3PTcYkO94sTc4tK8dL3k/NxNjMDo2Xbs5+YdjJc2 Bh9iFOBgVOLhXcDmGi/EmlhWXJl7iFGCg1lJhNfp7Ok4Id6UxMqq1KL8+KLSnNTiQ4ymQEdN ZJYSTc4HRnZeSbyhqaG5haWhubG5sZmFkjhvh8DBGCGB9MSS1OzU1ILUIpg+Jg5OqQbGeAf5 RSmJ8R42xy48bnt30+fCmlU2x5v+XdlpnXNDtmg+86qKHqGtD1e/NZtx1J7bvG32hG7PlWsa d3o8z51ZuaS+0nhZ0FH/w6lvj+rHfJld/OJwrugKP8GV7++WT2uvnO3wJ2ZvksO/SNn5DmI8 P59ezjkrd0pjMVfWQ4+d85fd6O94UJywRImlOCPRUIu5qDgRALOlfSi0AgAA X-CMS-MailID: 20200826063537eucas1p2d9a362f619920ad84c46f36cd13ec362 X-Msg-Generator: CA X-RootMTR: 20200826063537eucas1p2d9a362f619920ad84c46f36cd13ec362 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200826063537eucas1p2d9a362f619920ad84c46f36cd13ec362 References: <20200826063316.23486-1-m.szyprowski@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200826_073542_232199_A59D77DC X-CRM114-Status: GOOD ( 18.01 ) X-Spam-Score: -8.1 (--------) X-Spam-Report: SpamAssassin version 3.4.4 on casper.infradead.org summary: Content analysis details: (-8.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [210.118.77.12 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [210.118.77.12 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_SIGNED Message has a DKIM or DK signature, not necessarily valid -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 -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders -1.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: 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-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=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 Reviewed-by: Robin Murphy --- 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 2970e534e2bb..cb50f2ba2e46 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 @@ rockchip_gem_dma_map_sg(struct drm_device *drm, 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; }