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 11232CD6E5D for ; Tue, 2 Jun 2026 10:47:13 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 423FC10EEE0; Tue, 2 Jun 2026 10:47:12 +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="XHS10kZF"; dkim-atps=neutral Received: from out30-98.freemail.mail.aliyun.com (out30-98.freemail.mail.aliyun.com [115.124.30.98]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8A03910EEDD for ; Tue, 2 Jun 2026 10:47:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1780397229; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=Dmq5VZlTiHIu0DAcakOaUjD+KNjRLd5oRgXasfLjiiI=; b=XHS10kZF5bTHkqVtJX6j9hiT7GJ4TzXAypFSDmgvGnb7NjuMgLru8UypByoNCN8R7jM2p4ump0EpDAYwnkxDBs2BF2/Kdhurbj4VBeywLxBFh2KVFxbSzj9W2sP3IumLWbKJ4IokeAcG9PhCRCzJLr2CFwr4U7bbSAA2tf2lpZQ= 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-contentspam033045133197; MF=guanghuifeng@linux.alibaba.com; NM=1; PH=DS; RN=28; SR=0; TI=SMTPD_---0X44E97N_1780397226; Received: from VM20241011-104.tbsite.net(mailfrom:guanghuifeng@linux.alibaba.com fp:SMTPD_---0X44E97N_1780397226 cluster:ay36) by smtp.aliyun-inc.com; Tue, 02 Jun 2026 18:47:06 +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 19/30] iommu/sprd: implement iova_to_phys_length Date: Tue, 2 Jun 2026 18:46:26 +0800 Message-ID: <20260602104637.1219810-20-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-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 | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/sprd-iommu.c b/drivers/iommu/sprd-iommu.c index c1a34445d244..f8dbe24c332a 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; @@ -375,14 +376,23 @@ static phys_addr_t sprd_iommu_iova_to_phys(struct iommu_domain *domain, unsigned long start = domain->geometry.aperture_start; unsigned long end = domain->geometry.aperture_end; + if (mapped_length) + *mapped_length = 0; + 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 +430,7 @@ 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