From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6F3F63112BE; Thu, 14 Aug 2025 17:54:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755194091; cv=none; b=m3wMGF9Dx8DpOHhJLg1aaW0hasTV6Su/XdWC2bsJW1Yh7g21AfSGBclbXzWTgXpx3C1kzaw3HRJbvNrVPZQ3+T1HmosTzw55Z1uNYPD9S+oE//hkjkN5xvJZVP7vFrB7pYsW6fzEBokSmS1HYCU1+GkSnuxk3dxfZMbSkzZKLx0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755194091; c=relaxed/simple; bh=dJuAJRFwFKXIJkybNGJNx5df3xqMYXp7O5ndEMDZg04=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kfwNMqzB8LHqJzt566XQ+3eOg5jdqIXQ4mMsgvamkANU9njrTJtsCF3nG7theQAjg9xvrglN49qDInen3crbIDCbJ1TUANeTvs9bISaDUo2hnj5De7GdgxlS2Uy95pUxA553C98IWiMZsLzN1wNvO43eWmWR7b6wjvzuNP3HqCk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uzys0fct; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="uzys0fct" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43E02C4CEED; Thu, 14 Aug 2025 17:54:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755194091; bh=dJuAJRFwFKXIJkybNGJNx5df3xqMYXp7O5ndEMDZg04=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uzys0fctaKduRyxRgFcqqWB9TJX8pmDHxUeerVSmc9hyJder8/7gFl3wfN/unHZ2C S5CzVr+5GYaSUOFs9bmQ75Ecqcu9Pu4Whd8sbfjlhm2XOYZLIhCbef/DMcn3CTb45+ GiznNYOI/+RzFM5PLcTzNPRM35pJT6rtglK+OdmUleRbcbftiNpy2RaoYN+398HPlI EdMAoWucl5y3/7eOxc13vugzgtDg65qJbFLVFBCCc/G5s+GnSm+p2hysDhRiLfbghA f5DgNGtveHYzPp98rPtOh2sXpm5HgOwAFNALlZh24t/cDF5EYiXAKJyn8L22WCuZ0B PilBrOf3zwuYA== From: Leon Romanovsky To: Marek Szyprowski Cc: Leon Romanovsky , Jason Gunthorpe , Abdiel Janulgue , Alexander Potapenko , Alex Gaynor , Andrew Morton , Christoph Hellwig , Danilo Krummrich , 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 v3 06/16] iommu/dma: extend iommu_dma_*map_phys API to handle MMIO memory Date: Thu, 14 Aug 2025 20:53:57 +0300 Message-ID: <4f84639baf6d5d0e107fd2001dff91b6538ff9ae.1755193625.git.leon@kernel.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Leon Romanovsky Combine iommu_dma_*map_phys with iommu_dma_*map_resource interfaces in order to allow single phys_addr_t flow. In the following patches, the iommu_dma_map_resource() will be removed in favour of iommu_dma_map_phys(..., attrs | DMA_ATTR_MMIO) flow. 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