[PATCH rdma-next V2 0/6] Enable flow steering on IPoIB UD QP

[Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

Hi,

This is v2 of patch set from Yishai,

Changelog:
 v1->v2:
   * Use 'source_qpn' as part of QP creation without mandating association
     of an overlay with underlay QP.
 v0->v1:
   * Improved commit message

----
>From Yishai:

Enable accelerating IPoIB traffic from user applications

This series comes to allow user space applications to accelerate send
and receive traffic which is typically handled by IPoIB ULP. On the
receive flow, the user space application will use flow steering rules to
direct the ingress IPoIB UD QP traffic to its own user space UD QP. On
the send flow, the user space application will send from its own UD QP
with UD AH, while the packet on the wire will have the source QPN of the
IPoIB UD QP, which is the network interface advertised L2 hardware address.

This will be achieved by extending QP creation of IB UD QP to get
the source QP number of the matching IPoIB UD QP.

In order to create such a UD QP needs to provide the source QPN of the
IPoIB network interface.

The QPN should be achieved by using some networking tool as of ifconfig,
ip link show on the associated interface. For example, when IPoIB is
used, the QPN is the value of 3 bytes from the hardware address starting
after the first byte as defined by rfc4391 [1]

Current mlx5 driver implements this API for the IPoIB ULP.

Thanks

[1] https://tools.ietf.org/html/rfc4391#page-11

---
Available in the "topic/underlay_qp_v2" topic branch of this git repo:
git://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git

Or for browsing:
https://git.kernel.org/cgit/linux/kernel/git/leon/linux-rdma.git/log/?h=topic/underlay_qp_v2

Possible merge conflicts resolution is available in:
https://git.kernel.org/cgit/linux/kernel/git/leon/linux-rdma.git/log/?h=testing/queue-next


Yishai Hadas (6):
  IB/core: Enable QP creation with a given source QP number
  IB/uverbs: Enable QP creation with a given source QP number
  IB/mlx5: Add support for QP with a given source QPN
  IB/mlx5: Add multicast flow steering support for underlay QP
  net/mlx5: Report enhanced capabilities for IPoIB
  IB/mlx5: Report RX checksum capabilities for IPoIB

 drivers/infiniband/core/uverbs_cmd.c         | 17 +++++--
 drivers/infiniband/hw/mlx5/main.c            | 47 +++++++++++++-----
 drivers/infiniband/hw/mlx5/mlx5_ib.h         |  2 +
 drivers/infiniband/hw/mlx5/qp.c              | 72 ++++++++++++++++++++++------
 drivers/net/ethernet/mellanox/mlx5/core/fw.c |  6 +++
 include/linux/mlx5/device.h                  |  6 ++-
 include/rdma/ib_verbs.h                      |  2 +
 include/uapi/rdma/ib_user_verbs.h            |  2 +-
 8 files changed, 122 insertions(+), 32 deletions(-)

--
2.12.2

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