This series is to integrate a common link status event handler in ib_core as this functionality is needed by most drivers and implemented in very similar patterns. This is not a new issue but a restart of the previous work of our colleagues from several years ago, please see [1] and [2]. [1]: https://lore.kernel.org/linux-rdma/1570184954-21384-1-git-send-email-liweihang@xxxxxxxxxxxxx/ [2]: https://lore.kernel.org/linux-rdma/20200204082408.18728-1-liweihang@xxxxxxxxxx/ With this series, ib_core can handle netdev events of link status, i.e. NETDEV_UP, NETDEV_DOWN and NETDEV_CHANGE, and dispatch ib port events to ULPs instead of drivers. However some drivers currently have some private processing in their handler, rather than simply dispatching events. For these drivers, this series provides a new ops report_port_event(). If this ops is set, ib_core will call it and the events will still be handled in the driver. Events of LAG devices are also not handled in ib_core as currently there is no way to obtain ibdev from upper netdev in ib_core. This can be a TODO work after the core have more support for LAG. For now mlx5 is the only driver that supports RoCE LAG, and the events handling of mlx5 RoCE LAG will remain in mlx5 driver. In this series: Patch #1 adds a new helper to query the port num of a netdev associated with an ibdev. This is used in the following patch. Patch #2 adds support for link status events dispatching in ib_core. Patch #3-#7 removes link status event handler in several drivers. The port state setting in erdma, rxe and siw are replaced with ib_get_curr_port_state(), so their handler can be totally removed. Patch #8-#10 add support for report_port_event() ops in usnic, mlx4 and pvrdma as their current handler cannot be perfectly replaced by the ib_core handler in patch #2. Patch #11 adds a check in mlx5 that only events of RoCE LAG will be handled in mlx5 driver. Patch #12 adds a fast path for link-down events dispatching in hns by getting notified from hns3 nic driver directly. Yuyu Li (12): RDMA/core: Add ib_query_netdev_port() to query netdev port by IB device. RDMA/core: Support link status events dispatching RDMA/bnxt_re: Remove deliver net device event RDMA/erdma: Remove deliver net device event RDMA/irdma: Remove deliver net device event RDMA/rxe: Remove deliver net device event RDMA/siw: Remove deliver net device event RDMA/usnic: Support report_port_event() ops RDMA/mlx4: Support report_port_event() ops RDMA/pvrdma: Support report_port_event() ops RDMA/mlx5: Handle link status event only for LAG device RDMA/hns: Support fast path for link-down events dispatching drivers/infiniband/core/device.c | 99 +++++++++++++++++-- drivers/infiniband/hw/bnxt_re/main.c | 59 ----------- drivers/infiniband/hw/erdma/erdma.h | 2 - drivers/infiniband/hw/erdma/erdma_main.c | 8 -- drivers/infiniband/hw/erdma/erdma_verbs.c | 8 +- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 13 +++ drivers/infiniband/hw/irdma/utils.c | 3 - drivers/infiniband/hw/mlx4/main.c | 58 +++++------ drivers/infiniband/hw/mlx5/main.c | 3 + drivers/infiniband/hw/usnic/usnic_ib_main.c | 71 +++++++------ .../infiniband/hw/vmw_pvrdma/pvrdma_main.c | 42 +++++--- drivers/infiniband/sw/rxe/rxe_net.c | 22 +---- drivers/infiniband/sw/rxe/rxe_verbs.c | 1 + drivers/infiniband/sw/siw/siw.h | 3 - drivers/infiniband/sw/siw/siw_main.c | 16 --- drivers/infiniband/sw/siw/siw_verbs.c | 6 +- include/rdma/ib_verbs.h | 19 ++++ 17 files changed, 239 insertions(+), 194 deletions(-) -- 2.33.0
