From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-132.freemail.mail.aliyun.com (out30-132.freemail.mail.aliyun.com [115.124.30.132]) (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 6D713480DC3; Wed, 3 Jun 2026 15:19:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.132 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780499942; cv=none; b=Gc2hz+i1dNLDj3cnUb0Nv7GPYyfRXB1MDw6AeooNytw1r+EPGK6IfYvxDSsHTjkOqWPDkL1O6z3TM81f1eyjJT8VtVr6Rt9dj8r1+jqPUUukrwtT8T21yOKsqmQqN1JEVdjsVO10jKktUwXdO0fFoswcbccLaux5eXzMaTJlwLM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780499942; c=relaxed/simple; bh=s8n90Bjh6/KNP/yuxMlmVFD+bsOzKkuzrYFO/Y97uh8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZiEwi3S7Fb6DwmBlTI65MYXy8x1q/fqrnwwJRvo81Qqc/iyd8d3FaRXUkUhLYPy4t4lhdeov20Xdgy8I4f7pLPjoL4sRibHCqMpJW59KzH2w2q1cRURdNjvWLjNXgJ2jfGrt1vRmSkcOvD+U3+iQUZc4Z09EvDhMF9RIdwqbFPE= 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=Weu5S6q0; arc=none smtp.client-ip=115.124.30.132 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="Weu5S6q0" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1780499932; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=iWO0sMJG8r4J7LKnC484yIJn4WyUtK7EGFantGfMt+4=; b=Weu5S6q0BrffVvEdieSjbNd9xmSnPMtRbGlyJqEEgdQEUmKR3+qwHp9JwxlmQeGGYY9XuqIBfItfLooAx5qBR3MF9WlG2xEk3W7ZHrkvU0eNL/1jmguONy+wXM9XKeTqSQHx/eg9X0+oEfXUXPo+ZLuKigptui4Ymq09NwPIrVA= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R581e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037026112;MF=guanghuifeng@linux.alibaba.com;NM=1;PH=DS;RN=28;SR=0;TI=SMTPD_---0X47fR3Q_1780499930; Received: from VM20241011-104.tbsite.net(mailfrom:guanghuifeng@linux.alibaba.com fp:SMTPD_---0X47fR3Q_1780499930 cluster:ay36) by smtp.aliyun-inc.com; Wed, 03 Jun 2026 23:18:50 +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 12/32] iommu/exynos: implement iova_to_phys_length Date: Wed, 3 Jun 2026 23:17:44 +0800 Message-ID: <20260603151804.1963871-13-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> 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 Exynos IOMMU driver, returning the actual PTE mapping size. Signed-off-by: Guanghui Feng --- drivers/iommu/exynos-iommu.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 874d05f4b396..17d77b9114c4 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -1372,13 +1372,14 @@ 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; spin_lock_irqsave(&domain->pgtablelock, flags); @@ -1386,13 +1387,20 @@ 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 +1492,7 @@ 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