From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-98.freemail.mail.aliyun.com (out30-98.freemail.mail.aliyun.com [115.124.30.98]) (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 7BD393D8100; Tue, 2 Jun 2026 10:47:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.98 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780397229; cv=none; b=Wi4jzIBjEh2zyNPpvyDZdSkoTL/7ee+ZkVn6X7hs/FK+qda/yr4lwU70sEF/zIQx+ebMMltp4Dzu4LbYBCfh263TUR5OPM/EEC7AHzeIKdecntWQSufIOOrGkCAKR+aH4JBhrbvcJ1dk9dGYqLnrWXtPPx3dmIEkN8nkdgClGGk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780397229; c=relaxed/simple; bh=CeKjxseszSxfNQa6U88S28sJVv5LBIAEzhNVSHC2+lg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RNlPh4FvRbf/9g/kDHx5Hv8tnutZIyQmpPpYc6UDOIOq24SYp1CSIFruC4N2vxoiDVxHOuiLJ2ynQ9dXO/ssAyTbOyKveNqgLnGCBuUvs0hx6XzWe/tRTjTUvUL3aq5kO+cRXE03juVDCi1Ym7sT/ZgEo8VWbuMniCnNc/uh13Y= 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=uU/UwPX+; arc=none smtp.client-ip=115.124.30.98 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="uU/UwPX+" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1780397225; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=Z6uvMZHAmHwSUWc23cUrxXysIDcjk6iA/ZFsUBabgTo=; b=uU/UwPX+OqIT/ZJZcHd0yyCL2I8b4siMCDF7NjS2939BP43ifjsFd1vzLMy5wzgqQccOoerHBTLTq+QgBeLeX97C04rfVVY7kf2sgDs5HCAoYGmBYIbeq7qm3jQHynoTiZfKOOelBdZyQfB2ZHQJrB1DL2tJFBnJRfZ+OFPUs/Q= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R411e4;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_---0X44E95v_1780397222; Received: from VM20241011-104.tbsite.net(mailfrom:guanghuifeng@linux.alibaba.com fp:SMTPD_---0X44E95v_1780397222 cluster:ay36) by smtp.aliyun-inc.com; Tue, 02 Jun 2026 18:47:02 +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 15/30] iommu/mtk_v1: implement iova_to_phys_length Date: Tue, 2 Jun 2026 18:46:22 +0800 Message-ID: <20260602104637.1219810-16-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 MediaTek v1 IOMMU driver, returning the actual PTE mapping size. Also fix pre-existing bug: add page offset to physical address. Signed-off-by: Guanghui Feng --- drivers/iommu/mtk_iommu_v1.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index ac97dd2868d4..8733b87c9b94 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -393,17 +393,29 @@ static size_t mtk_iommu_v1_unmap(struct iommu_domain *domain, unsigned long iova return size; } -static phys_addr_t mtk_iommu_v1_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova) +static phys_addr_t mtk_iommu_v1_iova_to_phys_length(struct iommu_domain *domain, + dma_addr_t iova, + size_t *mapped_length) { struct mtk_iommu_v1_domain *dom = to_mtk_domain(domain); unsigned long flags; phys_addr_t pa; + if (mapped_length) + *mapped_length = 0; + spin_lock_irqsave(&dom->pgtlock, flags); pa = *(dom->pgt_va + (iova >> MT2701_IOMMU_PAGE_SHIFT)); pa = pa & (~(MT2701_IOMMU_PAGE_SIZE - 1)); spin_unlock_irqrestore(&dom->pgtlock, flags); + if (!pa) + return PHYS_ADDR_MAX; + + pa |= (iova & (MT2701_IOMMU_PAGE_SIZE - 1)); + if (mapped_length) + *mapped_length = MT2701_IOMMU_PAGE_SIZE; + return pa; } @@ -590,7 +602,7 @@ static const struct iommu_ops mtk_iommu_v1_ops = { .attach_dev = mtk_iommu_v1_attach_device, .map_pages = mtk_iommu_v1_map, .unmap_pages = mtk_iommu_v1_unmap, - .iova_to_phys = mtk_iommu_v1_iova_to_phys, + .iova_to_phys_length = mtk_iommu_v1_iova_to_phys_length, .free = mtk_iommu_v1_domain_free, } }; -- 2.43.7