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Petersen" , "daniel@iogearbox.net" , Dan Williams , "jack@suse.com" , Zhu Yanjun Subject: [RFC 06/16] iommu/dma: Implement link/unlink page callbacks Date: Tue, 5 Mar 2024 12:22:07 +0200 Message-ID: <1d3d26afcdbf95b053a3a44ceff34a4fa5334582.1709631413.git.leon@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: E2AC78000F X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: y4uuqiabcpnczd3mc3zt73anxeebt3fg X-HE-Tag: 1709634174-344974 X-HE-Meta: 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 MGuvGYMU pxlosNNu33avX+EH/v+9YA57LwbHIins/uRI3VxTmX6USJxyd31yaF3ARq+5mGd5Aajp81xiJGJl5NwuLnB0GlEg1jt2e9mLDpva9CVoMaa2kzi+OTYGF3PRZyeAhNVJ04a+9diIXIMFwifPihFlWLPZBM30tiz6ZvqSpvwSLPDqevOljmGD8v/paj5rfIuHDZSWBUVEV30Rl3Eu9X/NR78JDU+j6bkmR9t8laK9bGqHHSf4XhRLXcihsfA== 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: Message-ID: <20240305102207.MypqMPxZYKb2ZuRnahXeOB4r4gXAOq7lQOBYKJigl04@z> From: Leon Romanovsky Add an implementation of link/unlink interface to perform in map/unmap pages in fast patch for pre-allocated IOVA. Signed-off-by: Leon Romanovsky --- drivers/iommu/dma-iommu.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index dbdd373a609a..b683c4a4e9f8 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -1752,6 +1752,21 @@ static void iommu_dma_free_iova(struct device *dev, dma_addr_t iova, __iommu_dma_free_iova(cookie, iova, size, &iotlb_gather); } +static dma_addr_t iommu_dma_link_range(struct device *dev, struct page *page, + unsigned long offset, dma_addr_t iova, + size_t size, enum dma_data_direction dir, + unsigned long attrs) +{ + return __iommu_dma_map_pages(dev, page, offset, iova, size, dir, attrs); +} + +static void iommu_dma_unlink_range(struct device *dev, dma_addr_t addr, + size_t size, enum dma_data_direction dir, + unsigned long attrs) +{ + __iommu_dma_unmap_pages(dev, addr, size, dir, attrs, false); +} + static const struct dma_map_ops iommu_dma_ops = { .flags = DMA_F_PCI_P2PDMA_SUPPORTED, .alloc = iommu_dma_alloc, @@ -1776,6 +1791,8 @@ static const struct dma_map_ops iommu_dma_ops = { .opt_mapping_size = iommu_dma_opt_mapping_size, .alloc_iova = iommu_dma_alloc_iova, .free_iova = iommu_dma_free_iova, + .link_range = iommu_dma_link_range, + .unlink_range = iommu_dma_unlink_range, }; /* -- 2.44.0