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| author | Amir Vadai <amirva@mellanox.com> | 2016-05-13 12:55:41 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-16 13:43:51 -0400 |
| commit | 43a335e055bb7ebdc8a68ce7362ef26ef5bda92b (patch) | |
| tree | 0441f14934b5e341f12df45bc86bbca9c3dc3d03 /include | |
| parent | bd5251dbf156b6bc0661a9409d46e47160df61dd (diff) | |
| download | linux-stable-43a335e055bb7ebdc8a68ce7362ef26ef5bda92b.tar.gz linux-stable-43a335e055bb7ebdc8a68ce7362ef26ef5bda92b.tar.bz2 linux-stable-43a335e055bb7ebdc8a68ce7362ef26ef5bda92b.zip | |
net/mlx5_core: Flow counters infrastructure
If a counter has the aging flag set when created, it is added to a list
of counters that will be queried periodically from a workqueue. query
result and last use timestamp are cached.
add/del counter must be very efficient since thousands of such
operations might be issued in a second.
There is only a single reference to counters without aging, therefore
no need for locks.
But, counters with aging enabled are stored in a list. In order to make
code as lockless as possible, all the list manipulation and access to
hardware is done from a single context - the periodic counters query
thread.
The hardware supports multiple counters per FTE, however currently we
are using one counter for each FTE.
Signed-off-by: Amir Vadai <amirva@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mlx5/driver.h | 14 | ||||
| -rw-r--r-- | include/linux/mlx5/fs.h | 5 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h index 9613143f0561..07b504f7eb84 100644 --- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -41,6 +41,7 @@ #include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/radix-tree.h> +#include <linux/workqueue.h> #include <linux/mlx5/device.h> #include <linux/mlx5/doorbell.h> @@ -457,6 +458,17 @@ struct mlx5_irq_info { char name[MLX5_MAX_IRQ_NAME]; }; +struct mlx5_fc_stats { + struct list_head list; + struct list_head addlist; + /* protect addlist add/splice operations */ + spinlock_t addlist_lock; + + struct workqueue_struct *wq; + struct delayed_work work; + unsigned long next_query; +}; + struct mlx5_eswitch; struct mlx5_priv { @@ -520,6 +532,8 @@ struct mlx5_priv { struct mlx5_flow_root_namespace *fdb_root_ns; struct mlx5_flow_root_namespace *esw_egress_root_ns; struct mlx5_flow_root_namespace *esw_ingress_root_ns; + + struct mlx5_fc_stats fc_stats; }; enum mlx5_device_state { diff --git a/include/linux/mlx5/fs.h b/include/linux/mlx5/fs.h index c8b9ede1c20a..4b7a107d9c19 100644 --- a/include/linux/mlx5/fs.h +++ b/include/linux/mlx5/fs.h @@ -127,4 +127,9 @@ int mlx5_modify_rule_destination(struct mlx5_flow_rule *rule, struct mlx5_flow_destination *dest); struct mlx5_fc *mlx5_flow_rule_counter(struct mlx5_flow_rule *rule); +struct mlx5_fc *mlx5_fc_create(struct mlx5_core_dev *dev, bool aging); +void mlx5_fc_destroy(struct mlx5_core_dev *dev, struct mlx5_fc *counter); +void mlx5_fc_query_cached(struct mlx5_fc *counter, + u64 *bytes, u64 *packets, u64 *lastuse); + #endif |