From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-110.freemail.mail.aliyun.com (out30-110.freemail.mail.aliyun.com [115.124.30.110]) (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 ED3B83E5A03; Tue, 2 Jun 2026 10:47:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.110 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780397232; cv=none; b=FfAovi2T0E1jK9Kmpzh9yvVLs1cT92FAT/CMKQ85YXLrlXj+A0o2fRDjk7j1ihfBgrxNieBpQewF8kMqW8HQ4BwgCpZO7tTZhfPWMhMzgWIu/Qh0Cy6ZncKIDP1EatvV/ixlqbIrWoIwO1pTEbzgowwcDKmFyVW+oXMDTUS643s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780397232; c=relaxed/simple; bh=u9rhI9aM0c0TwxfdjWgnDFCOtsjvG9DC9ruiKqBsCeA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=d2htROQNL/Q+P5CmQ0hpNoV/yyYqr2sow6iSEO+AGrsDUUrcq2j619NPTKPtsUjrkWrghjPUZvWArAAHB7/0XQqdNyl3IPdrcycsLtdeWx3jSgsPLUoa6Y/nGUT3tSlGp7O0LbOJKArJ0WhL8DLgQMRNrobGDLichlN1lK7fmAw= 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=XHS10kZF; arc=none smtp.client-ip=115.124.30.110 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="XHS10kZF" 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> 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 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