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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A928CCA1005 for ; Tue, 2 Sep 2025 14:49:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 14E216B0029; Tue, 2 Sep 2025 10:49:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0FF628E0017; Tue, 2 Sep 2025 10:49:47 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0158B8E0016; Tue, 2 Sep 2025 10:49:46 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id E55746B0029 for ; Tue, 2 Sep 2025 10:49:46 -0400 (EDT) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id B9D90B6EA0 for ; Tue, 2 Sep 2025 14:49:46 +0000 (UTC) X-FDA: 83844594372.17.6224997 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf03.hostedemail.com (Postfix) with ESMTP id 2899920005 for ; Tue, 2 Sep 2025 14:49:44 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=VKECAb+7; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf03.hostedemail.com: domain of leon@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=leon@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1756824585; a=rsa-sha256; cv=none; b=2VJRt5Kot0c7P9zMizLJvxaAE+fGzHUOhYgvQ2D9v5HeLOKUZcT1K5uZIPQFEEJ05ONX0o ukcQ/IahtL0HB1GDrtaYuEl1QCr8JIv+e5OtNsmctPUnhQspMBrIErMnmuCk7uu391wZGZ q79lQMI69Hfw4SxoZ9xnWfWLYQhpg74= ARC-Authentication-Results: i=1; imf03.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=VKECAb+7; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf03.hostedemail.com: domain of leon@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=leon@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1756824585; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=6APT/ghoDYbBmlId4Kq2wmBlk0N08YJMkAHkbYOh2K0=; b=Tofm87awmQLQLToywYk/8DArJ14cO8Z3M5G8VotcI4E4OjGGXXqHMsQHuXggLQ7Q/Na13s SKWhglqkV3Z7540TFDB6ndunoIFWULkYpmK65HRl3VZdo4fPMZT6o0owR2tSFzBNj/Hju2 sE8CDMhylAmCBS/JzTCDxxrFvwINO7Y= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id A23706021B; Tue, 2 Sep 2025 14:49:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A66F8C4CEED; Tue, 2 Sep 2025 14:49:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756824584; bh=2/thOeJ4NuvxSVVC3hxw/9bIX2PIBvboPgYtgi2/VE0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VKECAb+7Sse52mYJL41SXOrXDFGCRiIF9tuTww+7tx8TF5Ejmreeh3HY00rHaazQn aOTh2UXi0X7gB6XKiPuY2KJcOfZeTrAYxYVSBqbTN3F5Fl7eG0quZrJ/k42DqVVCsr GwhvRXbAMz4CU6yoxiw2WzZdasqegGQPNyQKGXTE5/3T3HPR4sL/jxhRLhqbGHtIqp Olwm6UL/KtvfA0rjsrKrcjQo7JfNFlEx+nnbC0Q+EsvdfGHJP1R+qDhsLnUhQ/x3ua ilF/FQzSLWqW8sNqDmIhrghX9qmh9Vix0gO6Gy0buRmc6/knYwd5Ib7hdXL+VxUnMe /kIUohye23SrQ== From: Leon Romanovsky To: Marek Szyprowski Cc: Leon Romanovsky , Jason Gunthorpe , Abdiel Janulgue , Alexander Potapenko , Alex Gaynor , Andrew Morton , Christoph Hellwig , Danilo Krummrich , David Hildenbrand , iommu@lists.linux.dev, Jason Wang , Jens Axboe , Joerg Roedel , Jonathan Corbet , Juergen Gross , kasan-dev@googlegroups.com, Keith Busch , linux-block@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-nvme@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-trace-kernel@vger.kernel.org, Madhavan Srinivasan , Masami Hiramatsu , Michael Ellerman , "Michael S. Tsirkin" , Miguel Ojeda , Robin Murphy , rust-for-linux@vger.kernel.org, Sagi Grimberg , Stefano Stabellini , Steven Rostedt , virtualization@lists.linux.dev, Will Deacon , xen-devel@lists.xenproject.org Subject: [PATCH v5 06/16] iommu/dma: implement DMA_ATTR_MMIO for iommu_dma_(un)map_phys() Date: Tue, 2 Sep 2025 17:48:43 +0300 Message-ID: <615b270dc8cd285c1b05cf3b9d3a969487049a5f.1756822782.git.leon@kernel.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 2899920005 X-Stat-Signature: nkjbp7g6di94xwi3sym743afhxg9mf51 X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1756824584-622190 X-HE-Meta: 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 XSy+uok7 qCNhCVF94tvcC1mDyEjLEKT317ZozTf7Z+L8T8e8jKHkZF+WCRw0Btp2iLpdbOS9dON7R9gtNd2XuLxqEdO/EriRWIIBB6CevwPPG2EZfweJGr400Dg7tpG+6Zppj1uqF6/yzrPiHDws+NAl8omuFkZbsnMe+dqNhHcXRn/Ks6omND9iUfKzYcGwOXuzDLfVEihJoCuts/YqgvDq9mATO6hLZ+uAssrbMOiBcYiH7d7aLo26fADY+O6jAV+ZojbzzIVtTIRMr9dqU3hD+j2+1oYyC6SuNriOryQzcfmpvxyq02iSd/UbOL6XbMFalB6AR6BVxS60E9gCt6uKo6Y4Z20tvIGjI5JrtPUuO X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Leon Romanovsky Make iommu_dma_map_phys() and iommu_dma_unmap_phys() respect DMA_ATTR_MMIO. DMA_ATTR_MMIO makes the functions behave the same as iommu_dma_(un)map_resource(): - No swiotlb is possible - No cache flushing is done (ATTR_MMIO should not be cached memory) - prot for iommu_map() has IOMMU_MMIO not IOMMU_CACHE This is preparation for replacing iommu_dma_map_resource() callers with iommu_dma_map_phys(DMA_ATTR_MMIO) and removing iommu_dma_(un)map_resource(). Reviewed-by: Jason Gunthorpe Signed-off-by: Leon Romanovsky --- drivers/iommu/dma-iommu.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index aea119f32f96..6804aaf034a1 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -1211,16 +1211,19 @@ dma_addr_t iommu_dma_map_phys(struct device *dev, phys_addr_t phys, size_t size, */ if (dev_use_swiotlb(dev, size, dir) && iova_unaligned(iovad, phys, size)) { + if (attrs & DMA_ATTR_MMIO) + return DMA_MAPPING_ERROR; + phys = iommu_dma_map_swiotlb(dev, phys, size, dir, attrs); if (phys == (phys_addr_t)DMA_MAPPING_ERROR) return DMA_MAPPING_ERROR; } - if (!coherent && !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) + if (!coherent && !(attrs & (DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_MMIO))) arch_sync_dma_for_device(phys, size, dir); iova = __iommu_dma_map(dev, phys, size, prot, dma_mask); - if (iova == DMA_MAPPING_ERROR) + if (iova == DMA_MAPPING_ERROR && !(attrs & DMA_ATTR_MMIO)) swiotlb_tbl_unmap_single(dev, phys, size, dir, attrs); return iova; } @@ -1228,10 +1231,14 @@ dma_addr_t iommu_dma_map_phys(struct device *dev, phys_addr_t phys, size_t size, void iommu_dma_unmap_phys(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction dir, unsigned long attrs) { - struct iommu_domain *domain = iommu_get_dma_domain(dev); phys_addr_t phys; - phys = iommu_iova_to_phys(domain, dma_handle); + if (attrs & DMA_ATTR_MMIO) { + __iommu_dma_unmap(dev, dma_handle, size); + return; + } + + phys = iommu_iova_to_phys(iommu_get_dma_domain(dev), dma_handle); if (WARN_ON(!phys)) return; -- 2.50.1