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RDMA/mlx5: Raise async event on device speed change

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Raise IB_EVENT_DEVICE_SPEED_CHANGE whenever the speed of one of the
device's ports changes. Usually all ports of the device changes
together.

This ensures user applications and upper-layer software are immediately
notified when bandwidth changes, improving traffic management in dynamic
environments. This is especially useful for vports which are part of a
LAG configuration, to know if the effective speed of the LAG was
changed.

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Edward Srouji <edwards@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Or Har-Toov 2025-12-18 17:58:53 +02:00 committed by Leon Romanovsky
parent 51a07ce2fe
commit 3fd984d5cd
1 changed files with 8 additions and 0 deletions
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8
drivers/infiniband/hw/mlx5/main.c
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@ -2838,6 +2838,14 @@ static int handle_port_change(struct mlx5_ib_dev *ibdev, struct mlx5_eqe *eqe,
case MLX5_PORT_CHANGE_SUBTYPE_ACTIVE:
case MLX5_PORT_CHANGE_SUBTYPE_DOWN:
case MLX5_PORT_CHANGE_SUBTYPE_INITIALIZED:
if (ibdev->ib_active) {
struct ib_event speed_event = {};
speed_event.device = &ibdev->ib_dev;
speed_event.event = IB_EVENT_DEVICE_SPEED_CHANGE;
ib_dispatch_event(&speed_event);
}
/* In RoCE, port up/down events are handled in
* mlx5_netdev_event().
*/