[PATCH net-next 0/3] mlx5: Support HWS flow meter/sampler actions in FS core

[PATCH net-next 0/3] mlx5: Support HWS flow meter/sampler actions in FS core

[Tariq Toukan]

Hi,

This series by Moshe adds support for flow meter and flow sampler HW
Steering actions in FS core level. As these actions can be shared by
multiple rules, these patches use refcounts to manage the HWS actions
sharing in FS core level.

Regards,
Tariq

Moshe Shemesh (3):
  net/mlx5: fs, add API for sharing HWS action by refcount
  net/mlx5: fs, add support for flow meters HWS action
  net/mlx5: fs, add support for dest flow sampler HWS action

 .../ethernet/mellanox/mlx5/core/en/tc/meter.c |   5 +
 .../ethernet/mellanox/mlx5/core/en/tc/meter.h |  13 +
 .../mellanox/mlx5/core/eswitch_offloads.c     |   1 +
 .../net/ethernet/mellanox/mlx5/core/fs_core.h |   8 +-
 .../mellanox/mlx5/core/steering/hws/fs_hws.c  | 231 +++++++++++++++++-
 .../mellanox/mlx5/core/steering/hws/fs_hws.h  |  24 ++
 .../mlx5/core/steering/hws/fs_hws_pools.c     |  41 +---
 include/linux/mlx5/fs.h                       |   1 +
 8 files changed, 272 insertions(+), 52 deletions(-)


base-commit: 8ef890df4031121a94407c84659125cbccd3fdbe
-- 
2.45.0

[PATCH net-next 1/3] net/mlx5: fs, add API for sharing HWS action by refcount

[Tariq Toukan]

From: Moshe Shemesh <moshe@nvidia.com>

Counters HWS actions are shared using refcount, to create action on
demand by flow steering rule and destroy only when no rules are using
the action. The method is extensible to other HWS action types, such as
flow meter and sampler actions, in the downstream patches.

Add an API to facilitate the reuse of get/put logic for HWS actions
shared by refcount.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 .../net/ethernet/mellanox/mlx5/core/fs_core.h |  8 +--
 .../mellanox/mlx5/core/steering/hws/fs_hws.c  | 57 +++++++++++++++++++
 .../mellanox/mlx5/core/steering/hws/fs_hws.h  | 17 ++++++
 .../mlx5/core/steering/hws/fs_hws_pools.c     | 41 ++-----------
 4 files changed, 81 insertions(+), 42 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
index 20837e526679..dd8b56e2287f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
@@ -341,16 +341,10 @@ struct mlx5_fc {
 	u64 lastbytes;
 };
 
-struct mlx5_fc_bulk_hws_data {
-	struct mlx5hws_action *hws_action;
-	struct mutex lock; /* protects hws_action */
-	refcount_t hws_action_refcount;
-};
-
 struct mlx5_fc_bulk {
 	struct mlx5_fs_bulk fs_bulk;
 	u32 base_id;
-	struct mlx5_fc_bulk_hws_data hws_data;
+	struct mlx5_fs_hws_data hws_data;
 	struct mlx5_fc fcs[];
 };
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
index f34bbbbba1c2..50e43d574e0a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
@@ -519,6 +519,63 @@ mlx5_fs_create_action_last(struct mlx5hws_context *ctx)
 	return mlx5hws_action_create_last(ctx, flags);
 }
 
+static struct mlx5hws_action *
+mlx5_fs_create_hws_action(struct mlx5_fs_hws_create_action_ctx *create_ctx)
+{
+	u32 flags = MLX5HWS_ACTION_FLAG_HWS_FDB | MLX5HWS_ACTION_FLAG_SHARED;
+
+	switch (create_ctx->actions_type) {
+	case MLX5HWS_ACTION_TYP_CTR:
+		return mlx5hws_action_create_counter(create_ctx->hws_ctx,
+						     create_ctx->id, flags);
+	default:
+		return NULL;
+	}
+}
+
+struct mlx5hws_action *
+mlx5_fs_get_hws_action(struct mlx5_fs_hws_data *fs_hws_data,
+		       struct mlx5_fs_hws_create_action_ctx *create_ctx)
+{
+	/* try avoid locking if not necessary */
+	if (refcount_inc_not_zero(&fs_hws_data->hws_action_refcount))
+		return fs_hws_data->hws_action;
+
+	mutex_lock(&fs_hws_data->lock);
+	if (refcount_inc_not_zero(&fs_hws_data->hws_action_refcount)) {
+		mutex_unlock(&fs_hws_data->lock);
+		return fs_hws_data->hws_action;
+	}
+	fs_hws_data->hws_action = mlx5_fs_create_hws_action(create_ctx);
+	if (!fs_hws_data->hws_action) {
+		mutex_unlock(&fs_hws_data->lock);
+		return NULL;
+	}
+	refcount_set(&fs_hws_data->hws_action_refcount, 1);
+	mutex_unlock(&fs_hws_data->lock);
+
+	return fs_hws_data->hws_action;
+}
+
+void mlx5_fs_put_hws_action(struct mlx5_fs_hws_data *fs_hws_data)
+{
+	if (!fs_hws_data)
+		return;
+
+	/* try avoid locking if not necessary */
+	if (refcount_dec_not_one(&fs_hws_data->hws_action_refcount))
+		return;
+
+	mutex_lock(&fs_hws_data->lock);
+	if (!refcount_dec_and_test(&fs_hws_data->hws_action_refcount)) {
+		mutex_unlock(&fs_hws_data->lock);
+		return;
+	}
+	mlx5hws_action_destroy(fs_hws_data->hws_action);
+	fs_hws_data->hws_action = NULL;
+	mutex_unlock(&fs_hws_data->lock);
+}
+
 static void mlx5_fs_destroy_fs_action(struct mlx5_fs_hws_rule_action *fs_action)
 {
 	switch (mlx5hws_action_get_type(fs_action->action)) {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h
index cbddb72d4362..1c4b853cf88d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h
@@ -58,6 +58,23 @@ struct mlx5_fs_hws_rule {
 	int num_fs_actions;
 };
 
+struct mlx5_fs_hws_data {
+	struct mlx5hws_action *hws_action;
+	struct mutex lock; /* protects hws_action */
+	refcount_t hws_action_refcount;
+};
+
+struct mlx5_fs_hws_create_action_ctx {
+	enum mlx5hws_action_type actions_type;
+	struct mlx5hws_context *hws_ctx;
+	u32 id;
+};
+
+struct mlx5hws_action *
+mlx5_fs_get_hws_action(struct mlx5_fs_hws_data *fs_hws_data,
+		       struct mlx5_fs_hws_create_action_ctx *create_ctx);
+void mlx5_fs_put_hws_action(struct mlx5_fs_hws_data *fs_hws_data);
+
 #ifdef CONFIG_MLX5_HW_STEERING
 
 bool mlx5_fs_hws_is_supported(struct mlx5_core_dev *dev);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws_pools.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws_pools.c
index 2ae4ac62b0e2..f1ecdba74e1f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws_pools.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws_pools.c
@@ -405,46 +405,17 @@ bool mlx5_fs_hws_mh_pool_match(struct mlx5_fs_pool *mh_pool,
 struct mlx5hws_action *mlx5_fc_get_hws_action(struct mlx5hws_context *ctx,
 					      struct mlx5_fc *counter)
 {
-	u32 flags = MLX5HWS_ACTION_FLAG_HWS_FDB | MLX5HWS_ACTION_FLAG_SHARED;
+	struct mlx5_fs_hws_create_action_ctx create_ctx;
 	struct mlx5_fc_bulk *fc_bulk = counter->bulk;
-	struct mlx5_fc_bulk_hws_data *fc_bulk_hws;
 
-	fc_bulk_hws = &fc_bulk->hws_data;
-	/* try avoid locking if not necessary */
-	if (refcount_inc_not_zero(&fc_bulk_hws->hws_action_refcount))
-		return fc_bulk_hws->hws_action;
+	create_ctx.hws_ctx = ctx;
+	create_ctx.id = fc_bulk->base_id;
+	create_ctx.actions_type = MLX5HWS_ACTION_TYP_CTR;
 
-	mutex_lock(&fc_bulk_hws->lock);
-	if (refcount_inc_not_zero(&fc_bulk_hws->hws_action_refcount)) {
-		mutex_unlock(&fc_bulk_hws->lock);
-		return fc_bulk_hws->hws_action;
-	}
-	fc_bulk_hws->hws_action =
-		mlx5hws_action_create_counter(ctx, fc_bulk->base_id, flags);
-	if (!fc_bulk_hws->hws_action) {
-		mutex_unlock(&fc_bulk_hws->lock);
-		return NULL;
-	}
-	refcount_set(&fc_bulk_hws->hws_action_refcount, 1);
-	mutex_unlock(&fc_bulk_hws->lock);
-
-	return fc_bulk_hws->hws_action;
+	return mlx5_fs_get_hws_action(&fc_bulk->hws_data, &create_ctx);
 }
 
 void mlx5_fc_put_hws_action(struct mlx5_fc *counter)
 {
-	struct mlx5_fc_bulk_hws_data *fc_bulk_hws = &counter->bulk->hws_data;
-
-	/* try avoid locking if not necessary */
-	if (refcount_dec_not_one(&fc_bulk_hws->hws_action_refcount))
-		return;
-
-	mutex_lock(&fc_bulk_hws->lock);
-	if (!refcount_dec_and_test(&fc_bulk_hws->hws_action_refcount)) {
-		mutex_unlock(&fc_bulk_hws->lock);
-		return;
-	}
-	mlx5hws_action_destroy(fc_bulk_hws->hws_action);
-	fc_bulk_hws->hws_action = NULL;
-	mutex_unlock(&fc_bulk_hws->lock);
+	mlx5_fs_put_hws_action(&counter->bulk->hws_data);
 }
-- 
2.45.0

Re: [PATCH net-next 1/3] net/mlx5: fs, add API for sharing HWS action by refcount

[Jacob Keller]

On 3/9/2025 11:07 AM, Tariq Toukan wrote:
> From: Moshe Shemesh <moshe@nvidia.com>
> 
> Counters HWS actions are shared using refcount, to create action on
> demand by flow steering rule and destroy only when no rules are using
> the action. The method is extensible to other HWS action types, such as
> flow meter and sampler actions, in the downstream patches.
> 
> Add an API to facilitate the reuse of get/put logic for HWS actions
> shared by refcount.
> 
> Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
> Reviewed-by: Mark Bloch <mbloch@nvidia.com>
> Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
> ---

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>

[PATCH net-next 2/3] net/mlx5: fs, add support for flow meters HWS action

[Tariq Toukan]

From: Moshe Shemesh <moshe@nvidia.com>

Add support for HW Steering action of flow meter range. Flow meters
range can use one HWS action for the whole range. Thus, share a cached
HWS action among rules that use same flow meter object range. Hold
refcount for each rule using the cached action.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 .../ethernet/mellanox/mlx5/core/en/tc/meter.c |   5 +
 .../ethernet/mellanox/mlx5/core/en/tc/meter.h |  13 ++
 .../mellanox/mlx5/core/eswitch_offloads.c     |   1 +
 .../mellanox/mlx5/core/steering/hws/fs_hws.c  | 120 ++++++++++++++++--
 .../mellanox/mlx5/core/steering/hws/fs_hws.h  |   5 +
 include/linux/mlx5/fs.h                       |   1 +
 6 files changed, 135 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.c
index 8218c892b161..7819fb297280 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.c
@@ -593,3 +593,8 @@ mlx5e_tc_meter_get_stats(struct mlx5e_flow_meter_handle *meter,
 	*drops = packets2;
 	*lastuse = max_t(u64, lastuse1, lastuse2);
 }
+
+int mlx5e_flow_meter_get_base_id(struct mlx5e_flow_meter_handle *meter)
+{
+	return meter->meters_obj->base_id;
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.h b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.h
index 9b795cd106bb..d6afb6556875 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.h
@@ -72,4 +72,17 @@ void
 mlx5e_tc_meter_get_stats(struct mlx5e_flow_meter_handle *meter,
 			 u64 *bytes, u64 *packets, u64 *drops, u64 *lastuse);
 
+#if IS_ENABLED(CONFIG_MLX5_CLS_ACT)
+
+int mlx5e_flow_meter_get_base_id(struct mlx5e_flow_meter_handle *meter);
+
+#else /* CONFIG_MLX5_CLS_ACT */
+
+static inline int
+mlx5e_flow_meter_get_base_id(struct mlx5e_flow_meter_handle *meter)
+{
+	return 0;
+}
+#endif /* CONFIG_MLX5_CLS_ACT */
+
 #endif /* __MLX5_EN_FLOW_METER_H__ */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 0fa0333106a2..967175cd7ca0 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -648,6 +648,7 @@ esw_setup_meter(struct mlx5_flow_attr *attr, struct mlx5_flow_act *flow_act)
 	meter = attr->meter_attr.meter;
 	flow_act->exe_aso.type = attr->exe_aso_type;
 	flow_act->exe_aso.object_id = meter->obj_id;
+	flow_act->exe_aso.base_id = mlx5e_flow_meter_get_base_id(meter);
 	flow_act->exe_aso.flow_meter.meter_idx = meter->idx;
 	flow_act->exe_aso.flow_meter.init_color = MLX5_FLOW_METER_COLOR_GREEN;
 	/* use metadata reg 5 for packet color */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
index 50e43d574e0a..edf7db1e6e9c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
@@ -66,6 +66,7 @@ static int mlx5_fs_init_hws_actions_pool(struct mlx5_core_dev *dev,
 	xa_init(&hws_pool->table_dests);
 	xa_init(&hws_pool->vport_dests);
 	xa_init(&hws_pool->vport_vhca_dests);
+	xa_init(&hws_pool->aso_meters);
 	return 0;
 
 cleanup_insert_hdr:
@@ -88,10 +89,14 @@ static int mlx5_fs_init_hws_actions_pool(struct mlx5_core_dev *dev,
 static void mlx5_fs_cleanup_hws_actions_pool(struct mlx5_fs_hws_context *fs_ctx)
 {
 	struct mlx5_fs_hws_actions_pool *hws_pool = &fs_ctx->hws_pool;
+	struct mlx5_fs_hws_data *fs_hws_data;
 	struct mlx5hws_action *action;
 	struct mlx5_fs_pool *pool;
 	unsigned long i;
 
+	xa_for_each(&hws_pool->aso_meters, i, fs_hws_data)
+		kfree(fs_hws_data);
+	xa_destroy(&hws_pool->aso_meters);
 	xa_for_each(&hws_pool->vport_vhca_dests, i, action)
 		mlx5hws_action_destroy(action);
 	xa_destroy(&hws_pool->vport_vhca_dests);
@@ -459,6 +464,70 @@ mlx5_fs_create_dest_action_range(struct mlx5hws_context *ctx,
 						      flags);
 }
 
+static struct mlx5_fs_hws_data *
+mlx5_fs_get_cached_hws_data(struct xarray *cache_xa, unsigned long index)
+{
+	struct mlx5_fs_hws_data *fs_hws_data;
+	int err;
+
+	xa_lock(cache_xa);
+	fs_hws_data = xa_load(cache_xa, index);
+	if (!fs_hws_data) {
+		fs_hws_data = kzalloc(sizeof(*fs_hws_data), GFP_ATOMIC);
+		if (!fs_hws_data) {
+			xa_unlock(cache_xa);
+			return NULL;
+		}
+		refcount_set(&fs_hws_data->hws_action_refcount, 0);
+		mutex_init(&fs_hws_data->lock);
+		err = __xa_insert(cache_xa, index, fs_hws_data, GFP_ATOMIC);
+		if (err) {
+			kfree(fs_hws_data);
+			xa_unlock(cache_xa);
+			return NULL;
+		}
+	}
+	xa_unlock(cache_xa);
+
+	return fs_hws_data;
+}
+
+static struct mlx5hws_action *
+mlx5_fs_get_action_aso_meter(struct mlx5_fs_hws_context *fs_ctx,
+			     struct mlx5_exe_aso *exe_aso)
+{
+	struct mlx5_fs_hws_create_action_ctx create_ctx;
+	struct mlx5hws_context *ctx = fs_ctx->hws_ctx;
+	struct mlx5_fs_hws_data *meter_hws_data;
+	u32 id = exe_aso->base_id;
+	struct xarray *meters_xa;
+
+	meters_xa = &fs_ctx->hws_pool.aso_meters;
+	meter_hws_data = mlx5_fs_get_cached_hws_data(meters_xa, id);
+	if (!meter_hws_data)
+		return NULL;
+
+	create_ctx.hws_ctx = ctx;
+	create_ctx.actions_type = MLX5HWS_ACTION_TYP_ASO_METER;
+	create_ctx.id = id;
+	create_ctx.return_reg_id = exe_aso->return_reg_id;
+
+	return mlx5_fs_get_hws_action(meter_hws_data, &create_ctx);
+}
+
+static void mlx5_fs_put_action_aso_meter(struct mlx5_fs_hws_context *fs_ctx,
+					 struct mlx5_exe_aso *exe_aso)
+{
+	struct mlx5_fs_hws_data *meter_hws_data;
+	struct xarray *meters_xa;
+
+	meters_xa = &fs_ctx->hws_pool.aso_meters;
+	meter_hws_data = xa_load(meters_xa, exe_aso->base_id);
+	if (!meter_hws_data)
+		return;
+	return mlx5_fs_put_hws_action(meter_hws_data);
+}
+
 static struct mlx5hws_action *
 mlx5_fs_create_action_dest_array(struct mlx5hws_context *ctx,
 				 struct mlx5hws_action_dest_attr *dests,
@@ -528,6 +597,11 @@ mlx5_fs_create_hws_action(struct mlx5_fs_hws_create_action_ctx *create_ctx)
 	case MLX5HWS_ACTION_TYP_CTR:
 		return mlx5hws_action_create_counter(create_ctx->hws_ctx,
 						     create_ctx->id, flags);
+	case MLX5HWS_ACTION_TYP_ASO_METER:
+		return mlx5hws_action_create_aso_meter(create_ctx->hws_ctx,
+						       create_ctx->id,
+						       create_ctx->return_reg_id,
+						       flags);
 	default:
 		return NULL;
 	}
@@ -576,26 +650,33 @@ void mlx5_fs_put_hws_action(struct mlx5_fs_hws_data *fs_hws_data)
 	mutex_unlock(&fs_hws_data->lock);
 }
 
-static void mlx5_fs_destroy_fs_action(struct mlx5_fs_hws_rule_action *fs_action)
+static void mlx5_fs_destroy_fs_action(struct mlx5_flow_root_namespace *ns,
+				      struct mlx5_fs_hws_rule_action *fs_action)
 {
+	struct mlx5_fs_hws_context *fs_ctx = &ns->fs_hws_context;
+
 	switch (mlx5hws_action_get_type(fs_action->action)) {
 	case MLX5HWS_ACTION_TYP_CTR:
 		mlx5_fc_put_hws_action(fs_action->counter);
 		break;
+	case MLX5HWS_ACTION_TYP_ASO_METER:
+		mlx5_fs_put_action_aso_meter(fs_ctx, fs_action->exe_aso);
+		break;
 	default:
 		mlx5hws_action_destroy(fs_action->action);
 	}
 }
 
 static void
-mlx5_fs_destroy_fs_actions(struct mlx5_fs_hws_rule_action **fs_actions,
+mlx5_fs_destroy_fs_actions(struct mlx5_flow_root_namespace *ns,
+			   struct mlx5_fs_hws_rule_action **fs_actions,
 			   int *num_fs_actions)
 {
 	int i;
 
 	/* Free in reverse order to handle action dependencies */
 	for (i = *num_fs_actions - 1; i >= 0; i--)
-		mlx5_fs_destroy_fs_action(*fs_actions + i);
+		mlx5_fs_destroy_fs_action(ns, *fs_actions + i);
 	*num_fs_actions = 0;
 	kfree(*fs_actions);
 	*fs_actions = NULL;
@@ -792,8 +873,25 @@ static int mlx5_fs_fte_get_hws_actions(struct mlx5_flow_root_namespace *ns,
 	}
 
 	if (fte_action->action & MLX5_FLOW_CONTEXT_ACTION_EXECUTE_ASO) {
-		err = -EOPNOTSUPP;
-		goto free_actions;
+		if (fte_action->exe_aso.type != MLX5_EXE_ASO_FLOW_METER ||
+		    num_actions == MLX5_FLOW_CONTEXT_ACTION_MAX) {
+			err = -EOPNOTSUPP;
+			goto free_actions;
+		}
+
+		tmp_action = mlx5_fs_get_action_aso_meter(fs_ctx,
+							  &fte_action->exe_aso);
+		if (!tmp_action) {
+			err = -ENOMEM;
+			goto free_actions;
+		}
+		(*ractions)[num_actions].aso_meter.offset =
+			fte_action->exe_aso.flow_meter.meter_idx;
+		(*ractions)[num_actions].aso_meter.init_color =
+			fte_action->exe_aso.flow_meter.init_color;
+		(*ractions)[num_actions++].action = tmp_action;
+		fs_actions[num_fs_actions].action = tmp_action;
+		fs_actions[num_fs_actions++].exe_aso = &fte_action->exe_aso;
 	}
 
 	if (fte_action->action & MLX5_FLOW_CONTEXT_ACTION_DROP) {
@@ -907,7 +1005,7 @@ static int mlx5_fs_fte_get_hws_actions(struct mlx5_flow_root_namespace *ns,
 	return 0;
 
 free_actions:
-	mlx5_fs_destroy_fs_actions(&fs_actions, &num_fs_actions);
+	mlx5_fs_destroy_fs_actions(ns, &fs_actions, &num_fs_actions);
 free_dest_actions_alloc:
 	kfree(dest_actions);
 free_fs_actions_alloc:
@@ -957,7 +1055,7 @@ static int mlx5_cmd_hws_create_fte(struct mlx5_flow_root_namespace *ns,
 	return 0;
 
 free_actions:
-	mlx5_fs_destroy_fs_actions(&fte->fs_hws_rule.hws_fs_actions,
+	mlx5_fs_destroy_fs_actions(ns, &fte->fs_hws_rule.hws_fs_actions,
 				   &fte->fs_hws_rule.num_fs_actions);
 out_err:
 	mlx5_core_err(ns->dev, "Failed to create hws rule err(%d)\n", err);
@@ -977,7 +1075,8 @@ static int mlx5_cmd_hws_delete_fte(struct mlx5_flow_root_namespace *ns,
 	err = mlx5hws_bwc_rule_destroy(rule->bwc_rule);
 	rule->bwc_rule = NULL;
 
-	mlx5_fs_destroy_fs_actions(&rule->hws_fs_actions, &rule->num_fs_actions);
+	mlx5_fs_destroy_fs_actions(ns, &rule->hws_fs_actions,
+				   &rule->num_fs_actions);
 
 	return err;
 }
@@ -1015,11 +1114,12 @@ static int mlx5_cmd_hws_update_fte(struct mlx5_flow_root_namespace *ns,
 	if (ret)
 		goto restore_actions;
 
-	mlx5_fs_destroy_fs_actions(&saved_hws_fs_actions, &saved_num_fs_actions);
+	mlx5_fs_destroy_fs_actions(ns, &saved_hws_fs_actions,
+				   &saved_num_fs_actions);
 	return ret;
 
 restore_actions:
-	mlx5_fs_destroy_fs_actions(&fte->fs_hws_rule.hws_fs_actions,
+	mlx5_fs_destroy_fs_actions(ns, &fte->fs_hws_rule.hws_fs_actions,
 				   &fte->fs_hws_rule.num_fs_actions);
 	fte->fs_hws_rule.hws_fs_actions = saved_hws_fs_actions;
 	fte->fs_hws_rule.num_fs_actions = saved_num_fs_actions;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h
index 1c4b853cf88d..6970b1aa9540 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h
@@ -22,6 +22,7 @@ struct mlx5_fs_hws_actions_pool {
 	struct xarray table_dests;
 	struct xarray vport_vhca_dests;
 	struct xarray vport_dests;
+	struct xarray aso_meters;
 };
 
 struct mlx5_fs_hws_context {
@@ -49,6 +50,7 @@ struct mlx5_fs_hws_rule_action {
 	struct mlx5hws_action *action;
 	union {
 		struct mlx5_fc *counter;
+		struct mlx5_exe_aso *exe_aso;
 	};
 };
 
@@ -68,6 +70,9 @@ struct mlx5_fs_hws_create_action_ctx {
 	enum mlx5hws_action_type actions_type;
 	struct mlx5hws_context *hws_ctx;
 	u32 id;
+	union {
+		u8 return_reg_id;
+	};
 };
 
 struct mlx5hws_action *
diff --git a/include/linux/mlx5/fs.h b/include/linux/mlx5/fs.h
index 01cb72d68c23..5da734a526a0 100644
--- a/include/linux/mlx5/fs.h
+++ b/include/linux/mlx5/fs.h
@@ -240,6 +240,7 @@ void mlx5_destroy_flow_group(struct mlx5_flow_group *fg);
 
 struct mlx5_exe_aso {
 	u32 object_id;
+	int base_id;
 	u8 type;
 	u8 return_reg_id;
 	union {
-- 
2.45.0

Re: [PATCH net-next 2/3] net/mlx5: fs, add support for flow meters HWS action

[Jacob Keller]

On 3/9/2025 11:07 AM, Tariq Toukan wrote:
> From: Moshe Shemesh <moshe@nvidia.com>
> 
> Add support for HW Steering action of flow meter range. Flow meters
> range can use one HWS action for the whole range. Thus, share a cached
> HWS action among rules that use same flow meter object range. Hold
> refcount for each rule using the cached action.
> 
> Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
> Reviewed-by: Mark Bloch <mbloch@nvidia.com>
> Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
> ---

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>

[PATCH net-next 3/3] net/mlx5: fs, add support for dest flow sampler HWS action

[Tariq Toukan]

From: Moshe Shemesh <moshe@nvidia.com>

Add support for HW Steering action of flow sampler destination. For each
flow sampler created cache the hws action by sampler id as a key. Hold
refcount for each rule using the cached action.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 .../mellanox/mlx5/core/steering/hws/fs_hws.c  | 54 +++++++++++++++++++
 .../mellanox/mlx5/core/steering/hws/fs_hws.h  |  2 +
 2 files changed, 56 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
index edf7db1e6e9c..1b787cd66e6f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c
@@ -67,6 +67,7 @@ static int mlx5_fs_init_hws_actions_pool(struct mlx5_core_dev *dev,
 	xa_init(&hws_pool->vport_dests);
 	xa_init(&hws_pool->vport_vhca_dests);
 	xa_init(&hws_pool->aso_meters);
+	xa_init(&hws_pool->sample_dests);
 	return 0;
 
 cleanup_insert_hdr:
@@ -94,6 +95,9 @@ static void mlx5_fs_cleanup_hws_actions_pool(struct mlx5_fs_hws_context *fs_ctx)
 	struct mlx5_fs_pool *pool;
 	unsigned long i;
 
+	xa_for_each(&hws_pool->sample_dests, i, fs_hws_data)
+		kfree(fs_hws_data);
+	xa_destroy(&hws_pool->sample_dests);
 	xa_for_each(&hws_pool->aso_meters, i, fs_hws_data)
 		kfree(fs_hws_data);
 	xa_destroy(&hws_pool->aso_meters);
@@ -528,6 +532,42 @@ static void mlx5_fs_put_action_aso_meter(struct mlx5_fs_hws_context *fs_ctx,
 	return mlx5_fs_put_hws_action(meter_hws_data);
 }
 
+static struct mlx5hws_action *
+mlx5_fs_get_dest_action_sampler(struct mlx5_fs_hws_context *fs_ctx,
+				struct mlx5_flow_rule *dst)
+{
+	struct mlx5_fs_hws_create_action_ctx create_ctx;
+	struct mlx5hws_context *ctx = fs_ctx->hws_ctx;
+	struct mlx5_fs_hws_data *sampler_hws_data;
+	u32 id = dst->dest_attr.sampler_id;
+	struct xarray *sampler_xa;
+
+	sampler_xa = &fs_ctx->hws_pool.sample_dests;
+	sampler_hws_data = mlx5_fs_get_cached_hws_data(sampler_xa, id);
+	if (!sampler_hws_data)
+		return NULL;
+
+	create_ctx.hws_ctx = ctx;
+	create_ctx.actions_type = MLX5HWS_ACTION_TYP_SAMPLER;
+	create_ctx.id = id;
+
+	return mlx5_fs_get_hws_action(sampler_hws_data, &create_ctx);
+}
+
+static void mlx5_fs_put_dest_action_sampler(struct mlx5_fs_hws_context *fs_ctx,
+					    u32 sampler_id)
+{
+	struct mlx5_fs_hws_data *sampler_hws_data;
+	struct xarray *sampler_xa;
+
+	sampler_xa = &fs_ctx->hws_pool.sample_dests;
+	sampler_hws_data = xa_load(sampler_xa, sampler_id);
+	if (!sampler_hws_data)
+		return;
+
+	mlx5_fs_put_hws_action(sampler_hws_data);
+}
+
 static struct mlx5hws_action *
 mlx5_fs_create_action_dest_array(struct mlx5hws_context *ctx,
 				 struct mlx5hws_action_dest_attr *dests,
@@ -602,6 +642,9 @@ mlx5_fs_create_hws_action(struct mlx5_fs_hws_create_action_ctx *create_ctx)
 						       create_ctx->id,
 						       create_ctx->return_reg_id,
 						       flags);
+	case MLX5HWS_ACTION_TYP_SAMPLER:
+		return mlx5hws_action_create_flow_sampler(create_ctx->hws_ctx,
+							  create_ctx->id, flags);
 	default:
 		return NULL;
 	}
@@ -662,6 +705,9 @@ static void mlx5_fs_destroy_fs_action(struct mlx5_flow_root_namespace *ns,
 	case MLX5HWS_ACTION_TYP_ASO_METER:
 		mlx5_fs_put_action_aso_meter(fs_ctx, fs_action->exe_aso);
 		break;
+	case MLX5HWS_ACTION_TYP_SAMPLER:
+		mlx5_fs_put_dest_action_sampler(fs_ctx, fs_action->sampler_id);
+		break;
 	default:
 		mlx5hws_action_destroy(fs_action->action);
 	}
@@ -939,6 +985,14 @@ static int mlx5_fs_fte_get_hws_actions(struct mlx5_flow_root_namespace *ns,
 				dest_action = mlx5_fs_get_dest_action_vport(fs_ctx, dst,
 									    type_uplink);
 				break;
+			case MLX5_FLOW_DESTINATION_TYPE_FLOW_SAMPLER:
+				dest_action =
+					mlx5_fs_get_dest_action_sampler(fs_ctx,
+									dst);
+				fs_actions[num_fs_actions].action = dest_action;
+				fs_actions[num_fs_actions++].sampler_id =
+							dst->dest_attr.sampler_id;
+				break;
 			default:
 				err = -EOPNOTSUPP;
 				goto free_actions;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h
index 6970b1aa9540..8b56298288da 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h
@@ -23,6 +23,7 @@ struct mlx5_fs_hws_actions_pool {
 	struct xarray vport_vhca_dests;
 	struct xarray vport_dests;
 	struct xarray aso_meters;
+	struct xarray sample_dests;
 };
 
 struct mlx5_fs_hws_context {
@@ -51,6 +52,7 @@ struct mlx5_fs_hws_rule_action {
 	union {
 		struct mlx5_fc *counter;
 		struct mlx5_exe_aso *exe_aso;
+		u32 sampler_id;
 	};
 };
 
-- 
2.45.0

Re: [PATCH net-next 3/3] net/mlx5: fs, add support for dest flow sampler HWS action

[Jacob Keller]

On 3/9/2025 11:07 AM, Tariq Toukan wrote:
> From: Moshe Shemesh <moshe@nvidia.com>
> 
> Add support for HW Steering action of flow sampler destination. For each
> flow sampler created cache the hws action by sampler id as a key. Hold
> refcount for each rule using the cached action.
> 
> Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
> Reviewed-by: Mark Bloch <mbloch@nvidia.com>
> Signed-off-by: Tariq Toukan <tariqt@nvidia.com>

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>

Re: [PATCH net-next 0/3] mlx5: Support HWS flow meter/sampler actions in FS core

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Paolo Abeni <pabeni@redhat.com>:

On Sun, 9 Mar 2025 20:07:40 +0200 you wrote:
> Hi,
> 
> This series by Moshe adds support for flow meter and flow sampler HW
> Steering actions in FS core level. As these actions can be shared by
> multiple rules, these patches use refcounts to manage the HWS actions
> sharing in FS core level.
> 
> [...]

Here is the summary with links:
  - [net-next,1/3] net/mlx5: fs, add API for sharing HWS action by refcount
    https://git.kernel.org/netdev/net-next/c/cc2cc56fc6e6
  - [net-next,2/3] net/mlx5: fs, add support for flow meters HWS action
    https://git.kernel.org/netdev/net-next/c/82d3639ef7dc
  - [net-next,3/3] net/mlx5: fs, add support for dest flow sampler HWS action
    https://git.kernel.org/netdev/net-next/c/32e658c84b6d

You are awesome, thank you!
-- 
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