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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>
112 lines
3.5 KiB
Plaintext
112 lines
3.5 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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menuconfig INFINIBAND
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tristate "InfiniBand support"
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depends on HAS_IOMEM && HAS_DMA
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depends on NET
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depends on INET
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depends on m || IPV6 != m
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depends on !ALPHA
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select IRQ_POLL
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select DIMLIB
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help
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Core support for InfiniBand (IB). Make sure to also select
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any protocols you wish to use as well as drivers for your
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InfiniBand hardware.
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if INFINIBAND
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config INFINIBAND_USER_MAD
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tristate "InfiniBand userspace MAD support"
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depends on INFINIBAND
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help
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Userspace InfiniBand Management Datagram (MAD) support. This
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is the kernel side of the userspace MAD support, which allows
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userspace processes to send and receive MADs. You will also
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need libibumad from rdma-core
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<https://github.com/linux-rdma/rdma-core>.
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config INFINIBAND_USER_ACCESS
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tristate "InfiniBand userspace access (verbs and CM)"
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depends on MMU
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help
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Userspace InfiniBand access support. This enables the
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kernel side of userspace verbs and the userspace
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communication manager (CM). This allows userspace processes
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to set up connections and directly access InfiniBand
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hardware for fast-path operations. You will also need
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libibverbs, libibcm and a hardware driver library from
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rdma-core <https://github.com/linux-rdma/rdma-core>.
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config INFINIBAND_USER_MEM
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bool
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depends on INFINIBAND_USER_ACCESS != n
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depends on MMU
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select DMA_SHARED_BUFFER
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default y
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config INFINIBAND_ON_DEMAND_PAGING
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bool "InfiniBand on-demand paging support"
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depends on INFINIBAND_USER_MEM
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select MMU_NOTIFIER
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select INTERVAL_TREE
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select HMM_MIRROR
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default y
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help
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On demand paging support for the InfiniBand subsystem.
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Together with driver support this allows registration of
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memory regions without pinning their pages, fetching the
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pages on demand instead.
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config INFINIBAND_ADDR_TRANS
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bool "RDMA/CM"
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depends on INFINIBAND
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default y
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help
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Support for RDMA communication manager (CM).
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This allows for a generic connection abstraction over RDMA.
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config INFINIBAND_ADDR_TRANS_CONFIGFS
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bool
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depends on INFINIBAND_ADDR_TRANS && CONFIGFS_FS && !(INFINIBAND=y && CONFIGFS_FS=m)
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default y
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help
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ConfigFS support for RDMA communication manager (CM).
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This allows the user to config the default GID type that the CM
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uses for each device, when initiaing new connections.
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config INFINIBAND_VIRT_DMA
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def_bool !HIGHMEM
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if INFINIBAND_USER_ACCESS || !INFINIBAND_USER_ACCESS
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source "drivers/infiniband/hw/mthca/Kconfig"
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source "drivers/infiniband/hw/qib/Kconfig"
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source "drivers/infiniband/hw/cxgb4/Kconfig"
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source "drivers/infiniband/hw/efa/Kconfig"
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source "drivers/infiniband/hw/i40iw/Kconfig"
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source "drivers/infiniband/hw/mlx4/Kconfig"
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source "drivers/infiniband/hw/mlx5/Kconfig"
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source "drivers/infiniband/hw/ocrdma/Kconfig"
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source "drivers/infiniband/hw/vmw_pvrdma/Kconfig"
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source "drivers/infiniband/hw/usnic/Kconfig"
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source "drivers/infiniband/hw/hns/Kconfig"
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source "drivers/infiniband/hw/bnxt_re/Kconfig"
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source "drivers/infiniband/hw/hfi1/Kconfig"
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source "drivers/infiniband/hw/qedr/Kconfig"
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source "drivers/infiniband/sw/rdmavt/Kconfig"
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source "drivers/infiniband/sw/rxe/Kconfig"
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source "drivers/infiniband/sw/siw/Kconfig"
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endif
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source "drivers/infiniband/ulp/ipoib/Kconfig"
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source "drivers/infiniband/ulp/srp/Kconfig"
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source "drivers/infiniband/ulp/srpt/Kconfig"
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source "drivers/infiniband/ulp/iser/Kconfig"
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source "drivers/infiniband/ulp/isert/Kconfig"
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source "drivers/infiniband/ulp/rtrs/Kconfig"
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source "drivers/infiniband/ulp/opa_vnic/Kconfig"
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endif # INFINIBAND
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