[dpdk-dev] [PATCH v2 00/14] net/mlx5: add support for multiport IB devices

Viacheslav Ovsiienko viacheslavo at mellanox.com
Mon Mar 25 18:03:21 CET 2019

The Mellanox NICs support SR-IOV and have E-Switch feature. 
When SR-IOV is set up in switchdev mode and E-Switch is enabled
we have so called VF representors in the system. All representors
belonging to the same E-Switch are created on the basis of the
single PCI function and with current implementation each representor
has its own dedicated Infiniband device and operates within its
own Infiniband context. It is proposed to provide representors
as ports of the single Infiniband device and operate on the
shared Infiniband context.

mlx5_pci_probe() routine is planned to be extended to probe
the ports of found Infiniband devices. All active ports,
belonging to the same Infiniband device will use the signle
shared Infiniband context of that device:
  - QP are created within shared context, with assigning to
    specified port
  - Verb flows are also created with specifying port index
  - Protection Domain is shared by all representors
  - Global Memory Regions Cache is shared by all representors,
    local ones are not (not in this patchset)
  - Shared Asynchronous Event Handler distributes events
    among the device ports (not in this patchset)
  - UAR mapping to user space is also shared (not in patchset)
Each representor has its own attach network interface device,
interface name and index can be retrieved via IB device and
port index, so the link control is performed via Netlink
in the same way as in existing implementation.

This patchset also superseedes http://patches.dpdk.org/patch/50486/

Signed-off-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>

	- clarifying comments added
	- asserts added
	- secondary process does not probe IB device at all and
	  does not create shared context
	- minor bugs (like ++ in assert) fixed
	- representor_id contains corresponding VF vport index,
	  no corrections +1 is needed anymore. vport index is
	  calculated in the only place in code and if indexing
	  schema is changed it would be easy to modify

Viacheslav Ovsiienko (13):
  net/mlx5: add representor recognition on kernels 5.x
  net/mlx5: modify get ifindex routine for multiport IB
  net/mlx5: add getting IB ports number for multiport IB
  net/mlx5: add multiport IB device support to probing
  net/mlx5: add IB shared context alloc/free functions
  net/mlx5: switch to the names in the shared IB context
  net/mlx5: switch to the shared Protection Domain
  net/mlx5: switch to the shared context IB attributes
  net/mlx5: switch to the shared IB device context
  net/mlx5: provide IB port for the object being created
  net/mlx5: update install/uninstall int handler routines
  net/mlx5: update event handler for multiport IB devices
  net/mlx5: add source vport match to the ingress rules

 drivers/net/mlx5/Makefile          |  10 +
 drivers/net/mlx5/meson.build       |   4 +
 drivers/net/mlx5/mlx5.c            | 644 ++++++++++++++++++++++++++-----------
 drivers/net/mlx5/mlx5.h            |  44 ++-
 drivers/net/mlx5/mlx5_ethdev.c     | 242 +++++++++-----
 drivers/net/mlx5/mlx5_flow.c       |   2 +
 drivers/net/mlx5/mlx5_flow_dv.c    |  45 ++-
 drivers/net/mlx5/mlx5_flow_verbs.c |   7 +-
 drivers/net/mlx5/mlx5_mr.c         |   4 +-
 drivers/net/mlx5/mlx5_nl.c         | 102 +++++-
 drivers/net/mlx5/mlx5_rxq.c        |  41 +--
 drivers/net/mlx5/mlx5_socket.c     |   4 +-
 drivers/net/mlx5/mlx5_stats.c      |  22 +-
 drivers/net/mlx5/mlx5_trigger.c    |   2 +-
 drivers/net/mlx5/mlx5_txq.c        |  24 +-
 15 files changed, 859 insertions(+), 338 deletions(-)


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