From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-111.freemail.mail.aliyun.com (out30-111.freemail.mail.aliyun.com [115.124.30.111]) (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 5C11D3E16B8; Wed, 3 Jun 2026 15:18:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.111 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780499935; cv=none; b=lvCsMS+/mOTj5dPPrAmHzsvgVaFYdyOG/r2Sm8Sz+cd0jQVB4WbqvW+XViPcgREVN5mhpA1DMuiY7Pi9jD1cUhTRHjOeoa5tnAvDtKHUoWKtOJ4KFp5z8oprpM3JSo9/yBJKBXd0cR2UCnWV0ITIHWpQkSp7b6yVnkxNIKGKayo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780499935; c=relaxed/simple; bh=YqTLlp4rQ5N80NTs3rOrlqQxzoKiBhSW5JW4kktMGXY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kuTsgCRi0nOgs6e7mQTlMMjPfiAxYK9WmqYg9YoPOIDYh65Ih+fLhi6aO6KixBxrdxu0sRfdIwwqQ+AxFQYUvWP8b6ZXe9mGacMh2Ta9Pn8s6toKT2pKIO35AEDr6c1kYdn/9RZ8zpw4Gjbeh+UjgWGCt0Li8cD0daCuRTF4D2Q= 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=c9wDNKVy; arc=none smtp.client-ip=115.124.30.111 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="c9wDNKVy" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1780499924; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=5K9kQ+7O2to9AMrCCxHb12XQWSw4xjjz1YrQKtCPM08=; b=c9wDNKVyh6CUp50BD1q43dV2vGm9+vjuQod3i5xEQ7UuVXL+7fVS787uSqpSpXjWfUGO0GyHXPuozT300VndBfxM2oh6AY+SauiX/jPVya6YXR/aHjdByi1Za46iXWPyyVnGZ9BhvxSwMU3hUjgUA59OO7IShh0KbLSzcFtwNAQ= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R151e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037009110;MF=guanghuifeng@linux.alibaba.com;NM=1;PH=DS;RN=28;SR=0;TI=SMTPD_---0X47fR1m_1780499922; Received: from VM20241011-104.tbsite.net(mailfrom:guanghuifeng@linux.alibaba.com fp:SMTPD_---0X47fR1m_1780499922 cluster:ay36) by smtp.aliyun-inc.com; Wed, 03 Jun 2026 23:18:42 +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 04/32] iommu/io-pgtable-dart: introduce iova_to_phys_length in io_pgtable_ops Date: Wed, 3 Jun 2026 23:17:36 +0800 Message-ID: <20260603151804.1963871-5-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 in DART backend: returns pgsize from cfg.pgsize_bitmap (single fixed page size). The old iova_to_phys is kept as a thin wrapper. Signed-off-by: Guanghui Feng --- drivers/iommu/io-pgtable-dart.c | 32 +++++++++++++++++++++++++------- 1 file changed, 25 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/io-pgtable-dart.c b/drivers/iommu/io-pgtable-dart.c index cbc5d6aa2daa..2dac21a578a7 100644 --- a/drivers/iommu/io-pgtable-dart.c +++ b/drivers/iommu/io-pgtable-dart.c @@ -333,29 +333,46 @@ static size_t dart_unmap_pages(struct io_pgtable_ops *ops, unsigned long iova, return i * pgsize; } +static phys_addr_t dart_iova_to_phys_length(struct io_pgtable_ops *ops, + unsigned long iova, + size_t *mapped_length); + static phys_addr_t dart_iova_to_phys(struct io_pgtable_ops *ops, - unsigned long iova) + unsigned long iova) +{ + phys_addr_t phys = dart_iova_to_phys_length(ops, iova, NULL); + + return (phys == PHYS_ADDR_MAX) ? 0 : phys; +} + +static phys_addr_t dart_iova_to_phys_length(struct io_pgtable_ops *ops, + unsigned long iova, + size_t *mapped_length) { struct dart_io_pgtable *data = io_pgtable_ops_to_data(ops); dart_iopte pte, *ptep; + size_t pgsize; ptep = dart_get_last(data, iova); /* Valid L2 IOPTE pointer? */ if (!ptep) - return 0; + return PHYS_ADDR_MAX; ptep += dart_get_last_index(data, iova); pte = READ_ONCE(*ptep); /* Found translation */ if (pte) { - iova &= (data->iop.cfg.pgsize_bitmap - 1); + pgsize = data->iop.cfg.pgsize_bitmap; + if (mapped_length) + *mapped_length = pgsize; + iova &= (pgsize - 1); return iopte_to_paddr(pte, data) | iova; } /* Ran out of page tables to walk */ - return 0; + return PHYS_ADDR_MAX; } static struct dart_io_pgtable * @@ -397,9 +414,10 @@ dart_alloc_pgtable(struct io_pgtable_cfg *cfg) data->bits_per_level = bits_per_level; data->iop.ops = (struct io_pgtable_ops) { - .map_pages = dart_map_pages, - .unmap_pages = dart_unmap_pages, - .iova_to_phys = dart_iova_to_phys, + .map_pages = dart_map_pages, + .unmap_pages = dart_unmap_pages, + .iova_to_phys = dart_iova_to_phys, + .iova_to_phys_length = dart_iova_to_phys_length, }; return data; -- 2.43.7