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IB/mlx5: Support congestion related counters

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This patch adds support to query the congestion related hardware counters
through new command and links them with other hw counters being available
in hw_counters sysfs location.

In order to reuse existing infrastructure it renames related q_counter
data structures to more generic counters to reflect q_counters and
congestion counters and maybe some other counters in the future.

New hardware counters:
 * rp_cnp_handled - CNP packets handled by the reaction point
 * rp_cnp_ignored - CNP packets ignored by the reaction point
 * np_cnp_sent    - CNP packets sent by notification point to respond to
                     CE marked RoCE packets
 * np_ecn_marked_roce_packets - CE marked RoCE packets received by
                                notification point

It also avoids returning ENOSYS which is specific for invalid
system call and produces the following checkpatch.pl warning.

WARNING: ENOSYS means 'invalid syscall nr' and nothing else
+		return -ENOSYS;

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Parav Pandit
2017-04-16 07:29:29 +03:00
committed by Doug Ledford
parent a43402af1e
commit e1f24a79f4
6 changed files with 156 additions and 73 deletions
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18
include/linux/mlx5/mlx5_ifc.h
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@@ -4735,17 +4735,17 @@ struct mlx5_ifc_query_cong_statistics_out_bits {
u8 reserved_at_40[0x40];
u8 cur_flows[0x20];
u8 rp_cur_flows[0x20];
u8 sum_flows[0x20];
u8 cnp_ignored_high[0x20];
u8 rp_cnp_ignored_high[0x20];
u8 cnp_ignored_low[0x20];
u8 rp_cnp_ignored_low[0x20];
u8 cnp_handled_high[0x20];
u8 rp_cnp_handled_high[0x20];
u8 cnp_handled_low[0x20];
u8 rp_cnp_handled_low[0x20];
u8 reserved_at_140[0x100];
@@ -4755,13 +4755,13 @@ struct mlx5_ifc_query_cong_statistics_out_bits {
u8 accumulators_period[0x20];
u8 ecn_marked_roce_packets_high[0x20];
u8 np_ecn_marked_roce_packets_high[0x20];
u8 ecn_marked_roce_packets_low[0x20];
u8 np_ecn_marked_roce_packets_low[0x20];
u8 cnps_sent_high[0x20];
u8 np_cnp_sent_high[0x20];
u8 cnps_sent_low[0x20];
u8 np_cnp_sent_low[0x20];
u8 reserved_at_320[0x560];
};