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IB/mlx5: Report mlx5 packet pacing capabilities when querying device

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Enable mlx5 based hardware to report packet pacing capabilities
from kernel to user space. Packet pacing allows to limit the rate to any
number between the maximum and minimum, based on user settings.

The capabilities are exposed to user space through query_device by uhw.
The following capabilities are reported:

1. The maximum and minimum rate limit in kbps supported by packet pacing.
2. Bitmap showing which QP types are supported by packet pacing operation.

Signed-off-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bodong Wang
2016-12-01 13:43:13 +02:00
committed by Doug Ledford
parent ca5b91d631
commit d949167d68
2 changed files with 26 additions and 0 deletions
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13
drivers/infiniband/hw/mlx5/main.c
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@@ -693,6 +693,19 @@ static int mlx5_ib_query_device(struct ib_device *ibdev,
resp.response_length += sizeof(resp.cqe_comp_caps);
}
if (field_avail(typeof(resp), packet_pacing_caps, uhw->outlen)) {
if (MLX5_CAP_QOS(mdev, packet_pacing) &&
MLX5_CAP_GEN(mdev, qos)) {
resp.packet_pacing_caps.qp_rate_limit_max =
MLX5_CAP_QOS(mdev, packet_pacing_max_rate);
resp.packet_pacing_caps.qp_rate_limit_min =
MLX5_CAP_QOS(mdev, packet_pacing_min_rate);
resp.packet_pacing_caps.supported_qpts |=
1 << IB_QPT_RAW_PACKET;
}
resp.response_length += sizeof(resp.packet_pacing_caps);
}
if (uhw->outlen) {
err = ib_copy_to_udata(uhw, &resp, resp.response_length);