Hi, > -----Original Message----- > From: Slava Ovsiienko <viachesl...@nvidia.com> > Sent: Wednesday, July 7, 2021 6:54 PM > To: dev@dpdk.org > Cc: Raslan Darawsheh <rasl...@nvidia.com>; Matan Azrad > <ma...@nvidia.com>; NBU-Contact-Thomas Monjalon > <tho...@monjalon.net>; david.march...@redhat.com; sta...@dpdk.org > Subject: [PATCH v4 1/2] common/mlx5: add provider query port support to > glue library > > In order to get E-Switch vport identifiers the mlx5 PMD relies > on two approaches: > [a] use port query API if it is provided by rdma-core library > [b] otherwise, deduce vport ids from the related VF index > The latter is not reliable and may not work with newer kernel > drivers and in some configurations (LAG), causing E-Switch > malfunction. Hence, engaging the port query API is highly > desirable. > > Depending on rdma-core version the port query API is: > - very old OFED versions have no query API (approach [b]) > - rdma-core OFED < 5.5 provides mlx5dv_query_devx_port, > HAVE_MLX5DV_DR_DEVX_PORT flag is defined (approach [a]) > - rdma-core OFED >= 5.5 has mlx5dv_query_port, flag > HAVE_MLX5DV_DR_DEVX_PORT_V35 is defined (approach [a]) > - future OFED versions might remove mlx5dv_query_devx_port > and HAVE_MLX5DV_DR_DEVX_PORT will not be defined > - Upstream rdma-core < v35 has no port query API (approach [b]) > - Upstream rdma-core >= v35 has mlx5dv_query_port, flag > HAVE_MLX5DV_DR_DEVX_PORT_V35 is defined (approach [a]) > > In order to support the new mlx5dv_query_port routine, the > conditional compilation flag HAVE_MLX5DV_DR_DEVX_PORT_V35 > is introduced by the this patch. The flag HAVE_MLX5DV_DR_DEVX_PORT > is kept for compatibility with previous rdma-core versions. > > Despite this patch is not a bugfix (it follows the introduced API > variation in underlying library), it resolves the compatibility > issue and is highly desired to be ported to DPDK LTS. > > Cc: sta...@dpdk.org > > Signed-off-by: Viacheslav Ovsiienko <viachesl...@nvidia.com> > Acked-by: Matan Azrad <ma...@nvidia.com>
Replaced older version and pushed to next-net-mlx, Kindest regards, Raslan Darawsheh
