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Mon, 10 May 2021 02:51:22 -0700 (PDT) From: Claire Chang To: Rob Herring , mpe@ellerman.id.au, Joerg Roedel , Will Deacon , Frank Rowand , Konrad Rzeszutek Wilk , boris.ostrovsky@oracle.com, jgross@suse.com, Christoph Hellwig , Marek Szyprowski Subject: [PATCH v6 05/15] swiotlb: Add a new get_io_tlb_mem getter Date: Mon, 10 May 2021 17:50:16 +0800 Message-Id: <20210510095026.3477496-6-tientzu@chromium.org> X-Mailer: git-send-email 2.31.1.607.g51e8a6a459-goog In-Reply-To: <20210510095026.3477496-1-tientzu@chromium.org> References: <20210510095026.3477496-1-tientzu@chromium.org> MIME-Version: 1.0 Cc: heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, benh@kernel.crashing.org, joonas.lahtinen@linux.intel.com, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org, mingo@kernel.org, jxgao@google.com, sstabellini@kernel.org, Saravana Kannan , xypron.glpk@gmx.de, "Rafael J . Wysocki" , Bartosz Golaszewski , bskeggs@redhat.com, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Thierry Reding , intel-gfx@lists.freedesktop.org, matthew.auld@intel.com, linux-devicetree , daniel@ffwll.ch, airlied@linux.ie, maarten.lankhorst@linux.intel.com, linuxppc-dev@lists.ozlabs.org, jani.nikula@linux.intel.com, Nicolas Boichat , rodrigo.vivi@intel.com, bhelgaas@google.com, tientzu@chromium.org, Dan Williams , Andy Shevchenko , nouveau@lists.freedesktop.org, Greg KH , Randy Dunlap , lkml , "list@263.net:IOMMU DRIVERS" , Jim Quinlan , Robin Murphy , bauerman@linux.ibm.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Add a new getter, get_io_tlb_mem, to help select the io_tlb_mem struct. The restricted DMA pool is preferred if available. Signed-off-by: Claire Chang --- include/linux/swiotlb.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index 03ad6e3b4056..b469f04cca26 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -2,6 +2,7 @@ #ifndef __LINUX_SWIOTLB_H #define __LINUX_SWIOTLB_H +#include #include #include #include @@ -102,6 +103,16 @@ struct io_tlb_mem { }; extern struct io_tlb_mem *io_tlb_default_mem; +static inline struct io_tlb_mem *get_io_tlb_mem(struct device *dev) +{ +#ifdef CONFIG_DMA_RESTRICTED_POOL + if (dev && dev->dma_io_tlb_mem) + return dev->dma_io_tlb_mem; +#endif /* CONFIG_DMA_RESTRICTED_POOL */ + + return io_tlb_default_mem; +} + static inline bool is_swiotlb_buffer(phys_addr_t paddr) { struct io_tlb_mem *mem = io_tlb_default_mem; -- 2.31.1.607.g51e8a6a459-goog _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu