mlxsw: core: Make counter index allocated inside the action append

So far, the caller of mlxsw_afa_block_append_counter needed to allocate
counter index by hand. Benefit from the previously introduced resource
infra and counter_index_get/put callbacks, and allocate the counter
index in place where it is needed, inside the action append function.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c

@@ -559,6 +559,53 @@ err_fwd_entry_get:
 	return ERR_PTR(err);
 }
 
+struct mlxsw_afa_counter {
+	struct mlxsw_afa_resource resource;
+	u32 counter_index;
+};
+
+static void
+mlxsw_afa_counter_destroy(struct mlxsw_afa_block *block,
+			  struct mlxsw_afa_counter *counter)
+{
+	block->afa->ops->counter_index_put(block->afa->ops_priv,
+					   counter->counter_index);
+	kfree(counter);
+}
+
+static void
+mlxsw_afa_counter_destructor(struct mlxsw_afa_block *block,
+			     struct mlxsw_afa_resource *resource)
+{
+	struct mlxsw_afa_counter *counter;
+
+	counter = container_of(resource, struct mlxsw_afa_counter, resource);
+	mlxsw_afa_counter_destroy(block, counter);
+}
+
+static struct mlxsw_afa_counter *
+mlxsw_afa_counter_create(struct mlxsw_afa_block *block)
+{
+	struct mlxsw_afa_counter *counter;
+	int err;
+
+	counter = kzalloc(sizeof(*counter), GFP_KERNEL);
+	if (!counter)
+		return ERR_PTR(-ENOMEM);
+
+	err = block->afa->ops->counter_index_get(block->afa->ops_priv,
+						 &counter->counter_index);
+	if (err)
+		goto err_counter_index_get;
+	counter->resource.destructor = mlxsw_afa_counter_destructor;
+	mlxsw_afa_resource_add(block, &counter->resource);
+	return counter;
+
+err_counter_index_get:
+	kfree(counter);
+	return ERR_PTR(err);
+}
+
 #define MLXSW_AFA_ONE_ACTION_LEN 32
 #define MLXSW_AFA_PAYLOAD_OFFSET 4
 
@@ -876,11 +923,10 @@ mlxsw_afa_polcnt_pack(char *payload,
 	mlxsw_afa_polcnt_counter_index_set(payload, counter_index);
 }
 
-int mlxsw_afa_block_append_counter(struct mlxsw_afa_block *block,
-				   u32 counter_index)
+int mlxsw_afa_block_append_allocated_counter(struct mlxsw_afa_block *block,
+					     u32 counter_index)
 {
-	char *act = mlxsw_afa_block_append_action(block,
-						  MLXSW_AFA_POLCNT_CODE,
+	char *act = mlxsw_afa_block_append_action(block, MLXSW_AFA_POLCNT_CODE,
 						  MLXSW_AFA_POLCNT_SIZE);
 	if (!act)
 		return -ENOBUFS;
@@ -888,6 +934,32 @@ int mlxsw_afa_block_append_counter(struct mlxsw_afa_block *block,
 			      counter_index);
 	return 0;
 }
+EXPORT_SYMBOL(mlxsw_afa_block_append_allocated_counter);
+
+int mlxsw_afa_block_append_counter(struct mlxsw_afa_block *block,
+				   u32 *p_counter_index)
+{
+	struct mlxsw_afa_counter *counter;
+	u32 counter_index;
+	int err;
+
+	counter = mlxsw_afa_counter_create(block);
+	if (IS_ERR(counter))
+		return PTR_ERR(counter);
+	counter_index = counter->counter_index;
+
+	err = mlxsw_afa_block_append_allocated_counter(block, counter_index);
+	if (err)
+		goto err_append_allocated_counter;
+
+	if (p_counter_index)
+		*p_counter_index = counter_index;
+	return 0;
+
+err_append_allocated_counter:
+	mlxsw_afa_counter_destroy(block, counter);
+	return err;
+}
 EXPORT_SYMBOL(mlxsw_afa_block_append_counter);
 
 /* Virtual Router and Forwarding Domain Action

drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.h

@@ -69,8 +69,10 @@ int mlxsw_afa_block_append_fwd(struct mlxsw_afa_block *block,
 			       u8 local_port, bool in_port);
 int mlxsw_afa_block_append_vlan_modify(struct mlxsw_afa_block *block,
 				       u16 vid, u8 pcp, u8 et);
+int mlxsw_afa_block_append_allocated_counter(struct mlxsw_afa_block *block,
+					     u32 counter_index);
 int mlxsw_afa_block_append_counter(struct mlxsw_afa_block *block,
-				   u32 counter_index);
+				   u32 *p_counter_index);
 int mlxsw_afa_block_append_fid_set(struct mlxsw_afa_block *block, u16 fid);
 int mlxsw_afa_block_append_mcrouter(struct mlxsw_afa_block *block,
 				    u16 expected_irif, u16 min_mtu,

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -457,7 +457,6 @@ struct mlxsw_sp_acl_rule_info {
 	struct mlxsw_afk_element_values values;
 	struct mlxsw_afa_block *act_block;
 	unsigned int counter_index;
-	bool counter_valid;
 };
 
 enum mlxsw_sp_acl_profile {

drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c

@@ -462,27 +462,6 @@ u16 mlxsw_sp_acl_ruleset_group_id(struct mlxsw_sp_acl_ruleset *ruleset)
 	return ops->ruleset_group_id(ruleset->priv);
 }
 
-static int
-mlxsw_sp_acl_rulei_counter_alloc(struct mlxsw_sp *mlxsw_sp,
-				 struct mlxsw_sp_acl_rule_info *rulei)
-{
-	int err;
-
-	err = mlxsw_sp_flow_counter_alloc(mlxsw_sp, &rulei->counter_index);
-	if (err)
-		return err;
-	rulei->counter_valid = true;
-	return 0;
-}
-
-static void
-mlxsw_sp_acl_rulei_counter_free(struct mlxsw_sp *mlxsw_sp,
-				struct mlxsw_sp_acl_rule_info *rulei)
-{
-	rulei->counter_valid = false;
-	mlxsw_sp_flow_counter_free(mlxsw_sp, rulei->counter_index);
-}
-
 struct mlxsw_sp_acl_rule_info *
 mlxsw_sp_acl_rulei_create(struct mlxsw_sp_acl *acl)
 {
@@ -619,7 +598,7 @@ int mlxsw_sp_acl_rulei_act_count(struct mlxsw_sp *mlxsw_sp,
 				 struct mlxsw_sp_acl_rule_info *rulei)
 {
 	return mlxsw_afa_block_append_counter(rulei->act_block,
-					      rulei->counter_index);
+					      &rulei->counter_index);
 }
 
 int mlxsw_sp_acl_rulei_act_fid_set(struct mlxsw_sp *mlxsw_sp,
@@ -653,13 +632,8 @@ mlxsw_sp_acl_rule_create(struct mlxsw_sp *mlxsw_sp,
 		goto err_rulei_create;
 	}
 
-	err = mlxsw_sp_acl_rulei_counter_alloc(mlxsw_sp, rule->rulei);
-	if (err)
-		goto err_counter_alloc;
 	return rule;
 
-err_counter_alloc:
-	mlxsw_sp_acl_rulei_destroy(rule->rulei);
 err_rulei_create:
 	kfree(rule);
 err_alloc:
@@ -672,7 +646,6 @@ void mlxsw_sp_acl_rule_destroy(struct mlxsw_sp *mlxsw_sp,
 {
 	struct mlxsw_sp_acl_ruleset *ruleset = rule->ruleset;
 
-	mlxsw_sp_acl_rulei_counter_free(mlxsw_sp, rule->rulei);
 	mlxsw_sp_acl_rulei_destroy(rule->rulei);
 	kfree(rule);
 	mlxsw_sp_acl_ruleset_ref_dec(mlxsw_sp, ruleset);

drivers/net/ethernet/mellanox/mlxsw/spectrum_mr_tcam.c

@@ -243,7 +243,8 @@ mlxsw_sp_mr_tcam_afa_block_create(struct mlxsw_sp *mlxsw_sp,
 	if (!afa_block)
 		return ERR_PTR(-ENOMEM);
 
-	err = mlxsw_afa_block_append_counter(afa_block, counter_index);
+	err = mlxsw_afa_block_append_allocated_counter(afa_block,
+						       counter_index);
 	if (err)
 		goto err;