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authorJianxin Xiong <jianxin.xiong@intel.com>2020-12-16 00:27:13 +0300
committerJason Gunthorpe <jgg@nvidia.com>2021-01-20 23:07:52 +0300
commit368c0159d492d7fbdb5791b40c9263ec4e97a10f (patch)
treecd16d9c4358935b05f317e4e2ed096d3e61e74f9 /drivers/infiniband/Kconfig
parentabfa456555f4c2bde191cf12064168a05a2865a1 (diff)
downloadlinux-368c0159d492d7fbdb5791b40c9263ec4e97a10f.tar.xz
RDMA/umem: Support importing dma-buf as user memory region
Dma-buf is a standard cross-driver buffer sharing mechanism that can be used to support peer-to-peer access from RDMA devices. Device memory exported via dma-buf is associated with a file descriptor. This is passed to the user space as a property associated with the buffer allocation. When the buffer is registered as a memory region, the file descriptor is passed to the RDMA driver along with other parameters. Implement the common code for importing dma-buf object and mapping dma-buf pages. Link: https://lore.kernel.org/r/1608067636-98073-2-git-send-email-jianxin.xiong@intel.com Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com> Reviewed-by: Sean Hefty <sean.hefty@intel.com> Acked-by: Michael J. Ruhl <michael.j.ruhl@intel.com> Acked-by: Christian Koenig <christian.koenig@amd.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/Kconfig')
-rw-r--r--drivers/infiniband/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig
index 9325e189a215..04a78d9f8fe3 100644
--- a/drivers/infiniband/Kconfig
+++ b/drivers/infiniband/Kconfig
@@ -41,6 +41,7 @@ config INFINIBAND_USER_MEM
bool
depends on INFINIBAND_USER_ACCESS != n
depends on MMU
+ select DMA_SHARED_BUFFER
default y
config INFINIBAND_ON_DEMAND_PAGING