From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 477263ED3DC; Tue, 2 Jun 2026 10:47:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780397238; cv=none; b=bavRsbe417BCluxKcb5Jw0OGBoUd0dIECYDlLFCGCbQPiDlcgGEDEolUy2FfgJhvy0zVEBo4ec9Qpjgtw1iY4N3KUqfafDps6JgXsY2/z7LKlu7oqg2wiryk2b6SugTUBcb/sWyrCTlJ0YRGnTMoSDL5LiEj2SwGuEaVEUnsAnM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780397238; c=relaxed/simple; bh=UEntl2anLB1e847GbMQ0mCyY2//wHFrwTM8Eu+hDoqE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UemEI9i5ji8ZIsXtzgBxtXm4SoCwu+2hXFetQ/4JB6+m2GkfHEPCNpnlMNT2/cjVDyWp1tiKPJDiA60/wnPbW+EWtecNv1vDztZDP5k23qVFmYUyhDzdYTvhV3KN7r7+/idMvFAJ5kVYViB82gbePfsjIXCQUrkQXnk8NzuQ0oo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=nFshXLtE; arc=none smtp.client-ip=115.124.30.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="nFshXLtE" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1780397234; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=E1rU2c2uZHdN1cWrbtG6K1kwKPcxqttXAzthewRnRpY=; b=nFshXLtEXVmdorDGbqqxR4/iQEuot3SGIEEnxXgxCMZ/Jj55IOL5Fv7dk3XYH0QGQRXBJbM41W5eCvvCrt+dTQTc1Rdg0LSNWLKj/YATiGRFsQEMt2X8YFkiCl22Yw2wTt8ZjJvxpZ499h1rnXX9knCcIqiaEC13fdqQ5eUsWwg= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R121e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033045098064;MF=guanghuifeng@linux.alibaba.com;NM=1;PH=DS;RN=28;SR=0;TI=SMTPD_---0X44E97k_1780397228; Received: from VM20241011-104.tbsite.net(mailfrom:guanghuifeng@linux.alibaba.com fp:SMTPD_---0X44E97k_1780397228 cluster:ay36) by smtp.aliyun-inc.com; Tue, 02 Jun 2026 18:47:09 +0800 From: Guanghui Feng To: adrian.larumbe@collabora.com, airlied@gmail.com, alex@shazbot.org, baolu.lu@linux.intel.com, boris.brezillon@collabora.com, dri-devel@lists.freedesktop.org, dwmw2@infradead.org, iommu@lists.linux.dev, jgg@ziepe.ca, 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 Cc: alikernel-developer@linux.alibaba.com Subject: [PATCH v2 21/30] iommu/tegra-smmu: implement iova_to_phys_length Date: Tue, 2 Jun 2026 18:46:28 +0800 Message-ID: <20260602104637.1219810-22-guanghuifeng@linux.alibaba.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20260602104637.1219810-1-guanghuifeng@linux.alibaba.com> References: <20260531093637.3893199-1-guanghuifeng@linux.alibaba.com> <20260602104637.1219810-1-guanghuifeng@linux.alibaba.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 67e7a7b925f0..fbe28fb9385f 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -803,20 +803,26 @@ 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; dma_addr_t pte_dma; u32 *pte; + if (mapped_length) + *mapped_length = 0; + 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 +1013,7 @@ 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