From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3E4C5CD6E6F for ; Wed, 3 Jun 2026 15:19:07 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8A01D10FFEC; Wed, 3 Jun 2026 15:19:04 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="kB8lIvHg"; dkim-atps=neutral Received: from out30-132.freemail.mail.aliyun.com (out30-132.freemail.mail.aliyun.com [115.124.30.132]) by gabe.freedesktop.org (Postfix) with ESMTPS id B73DD10FFDC for ; Wed, 3 Jun 2026 15:19:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1780499941; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=YhFCJ0OCDdDnQ9GsEesCvbAqOo6Zg3iFvNCzM+hu5ak=; b=kB8lIvHgB7Mf8hAADuyKaxGMB64JMCqGbupJuIST/2yOWLtvhgJiuJb5A0/i2eEs4KG+CoC/ScqH1h7Sb8haCOEFeLkjEm6LnbRbGgdcIGqAfopBc8xFWldM2jw2gp369UaTiuEVI/oDuA6KW2+YI917ysgnH0VMCkhJsev/L/o= X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R231e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=maildocker-contentspam011083073210; MF=guanghuifeng@linux.alibaba.com; NM=1; PH=DS; RN=28; SR=0; TI=SMTPD_---0X47fR6-_1780499939; Received: from VM20241011-104.tbsite.net(mailfrom:guanghuifeng@linux.alibaba.com fp:SMTPD_---0X47fR6-_1780499939 cluster:ay36) by smtp.aliyun-inc.com; Wed, 03 Jun 2026 23:18:59 +0800 From: Guanghui Feng To: jgg@ziepe.ca Cc: adrian.larumbe@collabora.com, airlied@gmail.com, alex@shazbot.org, alikernel-developer@linux.alibaba.com, baolu.lu@linux.intel.com, boris.brezillon@collabora.com, dri-devel@lists.freedesktop.org, dwmw2@infradead.org, iommu@lists.linux.dev, joro@8bytes.org, kevin.tian@intel.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, liviu.dudau@arm.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, oliver.yang@linux.alibaba.com, robh@kernel.org, robin.murphy@arm.com, shiyu.zsq@linux.alibaba.com, steven.price@arm.com, suravee.suthikulpanit@amd.com, tzimmermann@suse.de, wei.guo.simon@linux.alibaba.com, will@kernel.org, xlpang@linux.alibaba.com Subject: [PATCH v3 21/32] iommu/tegra-smmu: implement iova_to_phys_length Date: Wed, 3 Jun 2026 23:17:53 +0800 Message-ID: <20260603151804.1963871-22-guanghuifeng@linux.alibaba.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20260603151804.1963871-1-guanghuifeng@linux.alibaba.com> References: <20260602104637.1219810-1-guanghuifeng@linux.alibaba.com> <20260603151804.1963871-1-guanghuifeng@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Implement iova_to_phys_length for Tegra SMMU IOMMU driver, returning the actual PTE mapping size. Signed-off-by: Guanghui Feng --- drivers/iommu/tegra-smmu.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 67e7a7b925f0..12f9bb623d87 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -803,8 +803,8 @@ static size_t tegra_smmu_unmap(struct iommu_domain *domain, unsigned long iova, return size; } -static phys_addr_t tegra_smmu_iova_to_phys(struct iommu_domain *domain, - dma_addr_t iova) +static phys_addr_t tegra_smmu_iova_to_phys_length(struct iommu_domain *domain, + dma_addr_t iova, size_t *mapped_length) { struct tegra_smmu_as *as = to_smmu_as(domain); unsigned long pfn; @@ -813,10 +813,13 @@ static phys_addr_t tegra_smmu_iova_to_phys(struct iommu_domain *domain, pte = tegra_smmu_pte_lookup(as, iova, &pte_dma); if (!pte || !*pte) - return 0; + return PHYS_ADDR_MAX; pfn = *pte & as->smmu->pfn_mask; + if (mapped_length) + *mapped_length = SZ_4K; + return SMMU_PFN_PHYS(pfn) + SMMU_OFFSET_IN_PAGE(iova); } @@ -1007,7 +1010,7 @@ static const struct iommu_ops tegra_smmu_ops = { .attach_dev = tegra_smmu_attach_dev, .map_pages = tegra_smmu_map, .unmap_pages = tegra_smmu_unmap, - .iova_to_phys = tegra_smmu_iova_to_phys, + .iova_to_phys_length = tegra_smmu_iova_to_phys_length, .free = tegra_smmu_domain_free, } }; -- 2.43.7