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 881B2CD6E60 for ; Wed, 3 Jun 2026 15:19:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 307E210FFF2; Wed, 3 Jun 2026 15:19:05 +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="R8Owicpc"; dkim-atps=neutral Received: from out30-110.freemail.mail.aliyun.com (out30-110.freemail.mail.aliyun.com [115.124.30.110]) by gabe.freedesktop.org (Postfix) with ESMTPS id B710910FFDC for ; Wed, 3 Jun 2026 15:19:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1780499939; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=MjBO95xDSmLrp4JNHx4KMhFqFrLuEXxwuA67QFALbhc=; b=R8Owicpc8mgsg/lriAfy1dQYAuR4cA7Z6ZHdp6yfeBXa7edr1kYSWDDAAmYRioNnonc8UM5bVPOjtfIzVaogjBLhPmLbLHz0twlhGWT6YKdpRg0ByFf9a27Phf0DJW34CSaZK8sxcZJ8O47mPbV/2KxxoS+neFLzyFFKAP7gz78= X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R721e4; 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_---0X47fR5K_1780499937; Received: from VM20241011-104.tbsite.net(mailfrom:guanghuifeng@linux.alibaba.com fp:SMTPD_---0X47fR5K_1780499937 cluster:ay36) by smtp.aliyun-inc.com; Wed, 03 Jun 2026 23:18:57 +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 19/32] iommu/sprd: implement iova_to_phys_length Date: Wed, 3 Jun 2026 23:17:51 +0800 Message-ID: <20260603151804.1963871-20-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 Spreadtrum IOMMU driver, returning the actual PTE mapping size. Signed-off-by: Guanghui Feng --- drivers/iommu/sprd-iommu.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/sprd-iommu.c b/drivers/iommu/sprd-iommu.c index c1a34445d244..3c04ec040d96 100644 --- a/drivers/iommu/sprd-iommu.c +++ b/drivers/iommu/sprd-iommu.c @@ -366,8 +366,9 @@ static void sprd_iommu_sync(struct iommu_domain *domain, sprd_iommu_sync_map(domain, 0, 0); } -static phys_addr_t sprd_iommu_iova_to_phys(struct iommu_domain *domain, - dma_addr_t iova) +static phys_addr_t sprd_iommu_iova_to_phys_length(struct iommu_domain *domain, + dma_addr_t iova, + size_t *mapped_length) { struct sprd_iommu_domain *dom = to_sprd_domain(domain); unsigned long flags; @@ -376,13 +377,19 @@ static phys_addr_t sprd_iommu_iova_to_phys(struct iommu_domain *domain, unsigned long end = domain->geometry.aperture_end; if (WARN_ON(iova < start || iova > end)) - return 0; + return PHYS_ADDR_MAX; spin_lock_irqsave(&dom->pgtlock, flags); pa = *(dom->pgt_va + ((iova - start) >> SPRD_IOMMU_PAGE_SHIFT)); - pa = (pa << SPRD_IOMMU_PAGE_SHIFT) + ((iova - start) & (SPRD_IOMMU_PAGE_SIZE - 1)); spin_unlock_irqrestore(&dom->pgtlock, flags); + if (!pa) + return PHYS_ADDR_MAX; + + pa = (pa << SPRD_IOMMU_PAGE_SHIFT) + ((iova - start) & (SPRD_IOMMU_PAGE_SIZE - 1)); + if (mapped_length) + *mapped_length = SPRD_IOMMU_PAGE_SIZE; + return pa; } @@ -420,7 +427,7 @@ static const struct iommu_ops sprd_iommu_ops = { .unmap_pages = sprd_iommu_unmap, .iotlb_sync_map = sprd_iommu_sync_map, .iotlb_sync = sprd_iommu_sync, - .iova_to_phys = sprd_iommu_iova_to_phys, + .iova_to_phys_length = sprd_iommu_iova_to_phys_length, .free = sprd_iommu_domain_free, } }; -- 2.43.7