IB/mlx5: Support congestion related counters
authorParav Pandit <parav@mellanox.com>
Sun, 16 Apr 2017 04:29:29 +0000 (07:29 +0300)
committerDoug Ledford <dledford@redhat.com>
Fri, 21 Apr 2017 16:29:31 +0000 (12:29 -0400)
commite1f24a79f424ddb03828de7c0152668c9a30146e
treeb488879662188619942742e45cd77a7828db94eb
parenta43402af1e34654ec3b693239330ff8cf6feaaae
IB/mlx5: Support congestion related counters

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>
drivers/infiniband/hw/mlx5/cmd.c
drivers/infiniband/hw/mlx5/cmd.h
drivers/infiniband/hw/mlx5/main.c
drivers/infiniband/hw/mlx5/mlx5_ib.h
drivers/infiniband/hw/mlx5/qp.c
include/linux/mlx5/mlx5_ifc.h