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Date: Thu, 30 Apr 2020 22:45:46 +0300
From: Maor Gottlieb <maorg@...lanox.com>
To: davem@...emloft.net, jgg@...lanox.com, dledford@...hat.com,
j.vosburgh@...il.com, vfalico@...il.com, andy@...yhouse.net,
kuba@...nel.org, jiri@...lanox.com, dsahern@...nel.org
Cc: leonro@...lanox.com, saeedm@...lanox.com,
linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
alexr@...lanox.com
Subject: Re: [PATCH V7 mlx5-next 00/16] Add support to get xmit slave
Please ignore this version, there was a problem with the indexing.
I just sent V8.
On 4/30/2020 9:50 PM, Maor Gottlieb wrote:
> Hi Dave,
>
> This series is a combination of netdev and RDMA, so in order to avoid
> conflicts, we would like to ask you to route this series through
> mlx5-next shared branch. It is based on v5.7-rc2 tag.
>
> ---------------------------------------------------------------------
>
> The following series adds support to get the LAG master xmit slave by
> introducing new .ndo - ndo_get_xmit_slave. Every LAG module can
> implement it and it first implemented in the bond driver.
> This is follow-up to the RFC discussion [1].
>
> The main motivation for doing this is for drivers that offload part
> of the LAG functionality. For example, Mellanox Connect-X hardware
> implements RoCE LAG which selects the TX affinity when the resources
> are created and port is remapped when it goes down.
>
> The first part of this patchset introduces the new .ndo and add the
> support to the bonding module.
>
> The second part adds support to get the RoCE LAG xmit slave by building
> skb of the RoCE packet based on the AH attributes and call to the new
> .ndo.
>
> The third part change the mlx5 driver driver to set the QP's affinity
> port according to the slave which found by the .ndo.
>
> Thanks
>
> [1]
> https://lore.kernel.org/netdev/20200126132126.9981-1-maorg@xxxxxxxxxxxx/
>
> Change log:
> v7: Change only in RDMA part:
> - return slave and as output
> - Don't hold lock while allocating skb.
> In addition, reorder patches, so mlx5 patches are before RDMA.
> v6: patch 1 - Fix commit message and add function description.
> patch 10 - Keep udata as function argument.
> v5: patch 1 - Remove rcu lock.
> patch 10 - Refactor patch that group the AH attributes in struct.
> patch 11 - call the ndo while holding the rcu and initialize xmit_slave.
> patch 12 - Store the xmit slave in rdma_ah_init_attr and qp_attr.
>
> v4: 1. Rename master_get_xmit_slave to netdev_get_xmit_slave and move
> the implementation to dev.c
> 2. Remove unnecessary check of NULL pointer.
> 3. Fix typo.
> v3: 1. Move master_get_xmit_slave to netdevice.h and change the flags
> arg.
> to bool.
> 2. Split helper functions commit to multiple commits for each bond
> mode.
> 3. Extract refcotring changes to seperate commits.
> v2: The first patch wasn't sent in v1.
> v1:
> https://lore.kernel.org/netdev/ac373456-b838-29cf-645f-b1ea1a93e3b0@xxxxxxxxx/T/#t
>
> Maor Gottlieb (16):
> net/core: Introduce netdev_get_xmit_slave
> bonding: Export skip slave logic to function
> bonding: Rename slave_arr to usable_slaves
> bonding/alb: Add helper functions to get the xmit slave
> bonding: Add helper function to get the xmit slave based on hash
> bonding: Add helper function to get the xmit slave in rr mode
> bonding: Add function to get the xmit slave in active-backup mode
> bonding: Add array of all slaves
> bonding: Implement ndo_get_xmit_slave
> net/mlx5: Change lag mutex lock to spin lock
> net/mlx5: Add support to get lag physical port
> RDMA: Group create AH arguments in struct
> RDMA/core: Add LAG functionality
> RDMA/core: Get xmit slave for LAG
> RDMA/mlx5: Refactor affinity related code
> RDMA/mlx5: Set lag tx affinity according to slave
>
> drivers/infiniband/core/Makefile | 2 +-
> drivers/infiniband/core/lag.c | 136 +++++++++
> drivers/infiniband/core/verbs.c | 66 +++--
> drivers/infiniband/hw/bnxt_re/ib_verbs.c | 8 +-
> drivers/infiniband/hw/bnxt_re/ib_verbs.h | 2 +-
> drivers/infiniband/hw/efa/efa.h | 3 +-
> drivers/infiniband/hw/efa/efa_verbs.c | 6 +-
> drivers/infiniband/hw/hns/hns_roce_ah.c | 5 +-
> drivers/infiniband/hw/hns/hns_roce_device.h | 4 +-
> drivers/infiniband/hw/mlx4/ah.c | 11 +-
> drivers/infiniband/hw/mlx4/mlx4_ib.h | 2 +-
> drivers/infiniband/hw/mlx5/ah.c | 14 +-
> drivers/infiniband/hw/mlx5/gsi.c | 33 ++-
> drivers/infiniband/hw/mlx5/main.c | 2 +
> drivers/infiniband/hw/mlx5/mlx5_ib.h | 3 +-
> drivers/infiniband/hw/mlx5/qp.c | 122 +++++---
> drivers/infiniband/hw/mthca/mthca_provider.c | 9 +-
> drivers/infiniband/hw/ocrdma/ocrdma_ah.c | 3 +-
> drivers/infiniband/hw/ocrdma/ocrdma_ah.h | 2 +-
> drivers/infiniband/hw/qedr/verbs.c | 4 +-
> drivers/infiniband/hw/qedr/verbs.h | 2 +-
> .../infiniband/hw/vmw_pvrdma/pvrdma_verbs.c | 5 +-
> .../infiniband/hw/vmw_pvrdma/pvrdma_verbs.h | 2 +-
> drivers/infiniband/sw/rdmavt/ah.c | 11 +-
> drivers/infiniband/sw/rdmavt/ah.h | 4 +-
> drivers/infiniband/sw/rxe/rxe_verbs.c | 9 +-
> drivers/net/bonding/bond_alb.c | 39 ++-
> drivers/net/bonding/bond_main.c | 268 +++++++++++++-----
> drivers/net/ethernet/mellanox/mlx5/core/lag.c | 66 +++--
> include/linux/mlx5/driver.h | 2 +
> include/linux/mlx5/mlx5_ifc.h | 4 +-
> include/linux/mlx5/qp.h | 2 +
> include/linux/netdevice.h | 12 +
> include/net/bond_alb.h | 4 +
> include/net/bonding.h | 3 +-
> include/rdma/ib_verbs.h | 12 +-
> include/rdma/lag.h | 23 ++
> net/core/dev.c | 22 ++
> 38 files changed, 696 insertions(+), 231 deletions(-)
> create mode 100644 drivers/infiniband/core/lag.c
> create mode 100644 include/rdma/lag.h
>
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