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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 960C0CD6E67 for ; Tue, 2 Jun 2026 10:47:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=FS/8CTbNUNtKKm1fU7W5+5c/18z86DAMGyOuBL/xGCw=; b=sdiQ/wYaO/AlqxzD9BB+Yx6zUv CWmnku2Bco7DrylKtpA1+clMiyh1l3ptyc0DRIU6msn9zGO7ie4+jDQyhFl475EcxgZ9chJHL4sq9 JMV3M4JR02yRp5VI1AuMmTzqO00bfkFMDOpXEiMr8UaT6YR28R0itIa8T5uq1IX44y6aUNjVxksmT wotnlKDFPEzVfuWGfAHFIMN5qIAfXnrixWpcOlySwgde6BuNNoorfRvORIxgH3eM33Yi1ZtUeZ5Ff S7gSfhFNuYPnXBPPopq8wtYeyfYUP0IH+t8nRbOz++U/xb+62nF1D17uBCVixcIg7u0L2jNwqggrZ glZ5VwsQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wUMeP-0000000CoBC-0Swk; Tue, 02 Jun 2026 10:47:13 +0000 Received: from out30-100.freemail.mail.aliyun.com ([115.124.30.100]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wUMeK-0000000CnxN-2Two for linux-arm-kernel@lists.infradead.org; Tue, 02 Jun 2026 10:47:10 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1780397226; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=FS/8CTbNUNtKKm1fU7W5+5c/18z86DAMGyOuBL/xGCw=; b=VMu5SuwdnaqXQ1NxNnItSuKNY7VetAgzT+lrSiT+D7189FXE3iB+unp1PjmBxV3sqP3MB97bnsNmE23PcessfTIB+c1LZeM2KtKyBawDes7NtxIqpgW+QvAG7hctQpzi4xxuAqwo2SOme77rWK7mcgOtxoisyofBFiGpWM6DTaY= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037033178;MF=guanghuifeng@linux.alibaba.com;NM=1;PH=DS;RN=28;SR=0;TI=SMTPD_---0X44E94t_1780397219; Received: from VM20241011-104.tbsite.net(mailfrom:guanghuifeng@linux.alibaba.com fp:SMTPD_---0X44E94t_1780397219 cluster:ay36) by smtp.aliyun-inc.com; Tue, 02 Jun 2026 18:46:59 +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 12/30] iommu/exynos: implement iova_to_phys_length Date: Tue, 2 Jun 2026 18:46:19 +0800 Message-ID: <20260602104637.1219810-13-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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260602_034708_867334_876E894A X-CRM114-Status: GOOD ( 10.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Implement iova_to_phys_length for Exynos IOMMU driver, returning the actual PTE mapping size. Signed-off-by: Guanghui Feng --- drivers/iommu/exynos-iommu.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 874d05f4b396..a9da28606cff 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -1372,13 +1372,17 @@ static size_t exynos_iommu_unmap(struct iommu_domain *iommu_domain, return 0; } -static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *iommu_domain, - dma_addr_t iova) +static phys_addr_t exynos_iommu_iova_to_phys_length(struct iommu_domain *iommu_domain, + dma_addr_t iova, + size_t *mapped_length) { struct exynos_iommu_domain *domain = to_exynos_domain(iommu_domain); sysmmu_pte_t *entry; unsigned long flags; - phys_addr_t phys = 0; + phys_addr_t phys = PHYS_ADDR_MAX; + + if (mapped_length) + *mapped_length = 0; spin_lock_irqsave(&domain->pgtablelock, flags); @@ -1386,13 +1390,20 @@ static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *iommu_domain, if (lv1ent_section(entry)) { phys = section_phys(entry) + section_offs(iova); + if (mapped_length) + *mapped_length = SECT_SIZE; } else if (lv1ent_page(entry)) { entry = page_entry(entry, iova); - if (lv2ent_large(entry)) + if (lv2ent_large(entry)) { phys = lpage_phys(entry) + lpage_offs(iova); - else if (lv2ent_small(entry)) + if (mapped_length) + *mapped_length = LPAGE_SIZE; + } else if (lv2ent_small(entry)) { phys = spage_phys(entry) + spage_offs(iova); + if (mapped_length) + *mapped_length = SPAGE_SIZE; + } } spin_unlock_irqrestore(&domain->pgtablelock, flags); @@ -1484,7 +1495,7 @@ static const struct iommu_ops exynos_iommu_ops = { .attach_dev = exynos_iommu_attach_device, .map_pages = exynos_iommu_map, .unmap_pages = exynos_iommu_unmap, - .iova_to_phys = exynos_iommu_iova_to_phys, + .iova_to_phys_length = exynos_iommu_iova_to_phys_length, .free = exynos_iommu_domain_free, } }; -- 2.43.7