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Soft RoCE (RXE) - The software RoCE driver
ib_rxe implements the RDMA transport and registers to the RDMA core
device as a kernel verbs provider. It also implements the packet IO
layer. On the other hand ib_rxe registers to the Linux netdev stack
as a udp encapsulating protocol, in that case RDMA, for sending and
receiving packets over any Ethernet device. This yields a RDMA
transport over the UDP/Ethernet network layer forming a RoCEv2
compatible device.
The configuration procedure of the Soft RoCE drivers requires
binding to any existing Ethernet network device. This is done with
/sys interface.
A userspace Soft RoCE library (librxe) provides user applications
the ability to run with Soft RoCE devices. The use of rxe verbs ins
user space requires the inclusion of librxe as a device specifics
plug-in to libibverbs. librxe is packaged separately.
Architecture:
+-----------------------------------------------------------+
| Application |
+-----------------------------------------------------------+
+-----------------------------------+
| libibverbs |
User +-----------------------------------+
+----------------+ +----------------+
| librxe | | HW RoCE lib |
+----------------+ +----------------+
+---------------------------------------------------------------+
+--------------+ +------------+
| Sockets | | RDMA ULP |
+--------------+ +------------+
+--------------+ +---------------------+
| TCP/IP | | ib_core |
+--------------+ +---------------------+
+------------+ +----------------+
Kernel | ib_rxe | | HW RoCE driver |
+------------+ +----------------+
+------------------------------------+
| NIC driver |
+------------------------------------+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+-----------------------------------------------------------+
| Application |
+-----------------------------------------------------------+
+-----------------------------------+
| libibverbs |
User +-----------------------------------+
+----------------+ +----------------+
| librxe | | HW RoCE lib |
+----------------+ +----------------+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+--------------+ +------------+
| Sockets | | RDMA ULP |
+--------------+ +------------+
+--------------+ +---------------------+
| TCP/IP | | ib_core |
+--------------+ +---------------------+
+------------+ +----------------+
Kernel | ib_rxe | | HW RoCE driver |
+------------+ +----------------+
+------------------------------------+
| NIC driver |
+------------------------------------+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Soft RoCE resources:
[1[ https://github.com/SoftRoCE/librxe-dev librxe - source code in
Github
[2] https://github.com/SoftRoCE/rxe-dev/wiki/rxe-dev:-Home - Soft RoCE
Wiki page
[3] https://github.com/SoftRoCE/librxe-dev - Soft RoCE userspace library
Signed-off-by: Kamal Heib <kamalh@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
92 lines
2.8 KiB
Plaintext
92 lines
2.8 KiB
Plaintext
menuconfig INFINIBAND
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tristate "InfiniBand support"
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depends on PCI || BROKEN
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depends on HAS_IOMEM
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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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select IRQ_POLL
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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 <http://www.openfabrics.org/downloads/management/>.
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config INFINIBAND_USER_ACCESS
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tristate "InfiniBand userspace access (verbs and CM)"
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select ANON_INODES
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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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<http://www.openfabrics.org/git/>.
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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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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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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
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depends on INFINIBAND
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default y
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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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source "drivers/infiniband/hw/mthca/Kconfig"
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source "drivers/infiniband/hw/qib/Kconfig"
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source "drivers/infiniband/hw/cxgb3/Kconfig"
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source "drivers/infiniband/hw/cxgb4/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/nes/Kconfig"
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source "drivers/infiniband/hw/ocrdma/Kconfig"
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source "drivers/infiniband/hw/usnic/Kconfig"
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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/sw/rdmavt/Kconfig"
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source "drivers/infiniband/sw/rxe/Kconfig"
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source "drivers/infiniband/hw/hfi1/Kconfig"
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endif # INFINIBAND
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