Merge tag 'verbs_flow_counters' of git://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git into for-next

Pull verbs counters series from Leon Romanovsky:

====================
Verbs flow counters support

This series comes to allow user space applications to monitor real time
traffic activity and events of the verbs objects it manages, e.g.: ibv_qp,
ibv_wq, ibv_flow.

The API enables generic counters creation and define mapping to
association with a verbs object, the current mlx5 driver is using this API
for flow counters.

With this API, an application can monitor the entire life cycle of object
activity, defined here as a static counters attachment.  This API also
allows dynamic counters monitoring of measurement points for a partial
period in the verbs object life cycle.

In addition it presents the implementation of the generic counters
interface.

This will be achieved by extending flow creation by adding a new flow
count specification type which allows the user to associate a previously
created flow counters using the generic verbs counters interface to the
created flow, once associated the user could read statistics by using the
read function of the generic counters interface.

The API includes:
1. create and destroyed API of a new counters objects
2. read the counters values from HW

Note:
Attaching API to allow application to define the measurement points per
objects is a user space only API and this data is passed to kernel when
the counted object (e.g. flow) is created with the counters object.
===================

* tag 'verbs_flow_counters':
  IB/mlx5: Add counters read support
  IB/mlx5: Add flow counters read support
  IB/mlx5: Add flow counters binding support
  IB/mlx5: Add counters create and destroy support
  IB/uverbs: Add support for flow counters
  IB/core: Add support for flow counters
  IB/core: Support passing uhw for create_flow
  IB/uverbs: Add read counters support
  IB/core: Introduce counters read verb
  IB/uverbs: Add create/destroy counters support
  IB/core: Introduce counters object and its create/destroy
  IB/uverbs: Add an ib_uobject getter to ioctl() infrastructure
  net/mlx5: Export flow counter related API
  net/mlx5: Use flow counter pointer as input to the query function

3 files changed, 11 insertions, 13 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 9a24314b817a..bb9665b7e8e7 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -2104,21 +2104,18 @@ static int mlx5_eswitch_query_vport_drop_stats(struct mlx5_core_dev *dev,
         struct mlx5_vport *vport = &esw->vports[vport_idx];
         u64 rx_discard_vport_down, tx_discard_vport_down;
         u64 bytes = 0;
-        u16 idx = 0;
         int err = 0;
 
         if (!vport->enabled || esw->mode != SRIOV_LEGACY)
                 return 0;
 
-        if (vport->egress.drop_counter) {
-                idx = vport->egress.drop_counter->id;
-                mlx5_fc_query(dev, idx, &stats->rx_dropped, &bytes);
-        }
+        if (vport->egress.drop_counter)
+                mlx5_fc_query(dev, vport->egress.drop_counter,
+                              &stats->rx_dropped, &bytes);
 
-        if (vport->ingress.drop_counter) {
-                idx = vport->ingress.drop_counter->id;
-                mlx5_fc_query(dev, idx, &stats->tx_dropped, &bytes);
-        }
+        if (vport->ingress.drop_counter)
+                mlx5_fc_query(dev, vport->ingress.drop_counter,
+                              &stats->tx_dropped, &bytes);
 
         if (!MLX5_CAP_GEN(dev, receive_discard_vport_down) &&
             !MLX5_CAP_GEN(dev, transmit_discard_vport_down))
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
index b6da322a8016..32070e5d993d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
@@ -233,8 +233,6 @@ void mlx5_fc_queue_stats_work(struct mlx5_core_dev *dev,
                               unsigned long delay);
 void mlx5_fc_update_sampling_interval(struct mlx5_core_dev *dev,
                                       unsigned long interval);
-int mlx5_fc_query(struct mlx5_core_dev *dev, u16 id,
-                  u64 *packets, u64 *bytes);
 
 int mlx5_init_fs(struct mlx5_core_dev *dev);
 void mlx5_cleanup_fs(struct mlx5_core_dev *dev);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c
index b7ab929d5f8e..58af6be13dfa 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c
@@ -243,6 +243,7 @@ err_out:
 
         return ERR_PTR(err);
 }
+EXPORT_SYMBOL(mlx5_fc_create);
 
 void mlx5_fc_destroy(struct mlx5_core_dev *dev, struct mlx5_fc *counter)
 {
@@ -260,6 +261,7 @@ void mlx5_fc_destroy(struct mlx5_core_dev *dev, struct mlx5_fc *counter)
         mlx5_cmd_fc_free(dev, counter->id);
         kfree(counter);
 }
+EXPORT_SYMBOL(mlx5_fc_destroy);
 
 int mlx5_init_fc_stats(struct mlx5_core_dev *dev)
 {
@@ -312,11 +314,12 @@ void mlx5_cleanup_fc_stats(struct mlx5_core_dev *dev)
         }
 }
 
-int mlx5_fc_query(struct mlx5_core_dev *dev, u16 id,
+int mlx5_fc_query(struct mlx5_core_dev *dev, struct mlx5_fc *counter,
                   u64 *packets, u64 *bytes)
 {
-        return mlx5_cmd_fc_query(dev, id, packets, bytes);
+        return mlx5_cmd_fc_query(dev, counter->id, packets, bytes);
 }
+EXPORT_SYMBOL(mlx5_fc_query);
 
 void mlx5_fc_query_cached(struct mlx5_fc *counter,
                           u64 *bytes, u64 *packets, u64 *lastuse)