1. 25 1月, 2017 1 次提交
  2. 04 8月, 2016 1 次提交
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      Soft RoCE driver · 8700e3e7
      Moni Shoua 提交于
      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: NKamal Heib <kamalh@mellanox.com>
      Signed-off-by: NAmir Vadai <amirv@mellanox.com>
      Signed-off-by: NMoni Shoua <monis@mellanox.com>
      Reviewed-by: NHaggai Eran <haggaie@mellanox.com>
      Signed-off-by: NDoug Ledford <dledford@redhat.com>
      8700e3e7