Commit bd5251db authored by Amir Vadai's avatar Amir Vadai Committed by David S. Miller
Browse files

net/mlx5_core: Introduce flow steering destination of type counter 



When adding a flow steering rule with a counter, need to supply a
destination of type MLX5_FLOW_DESTINATION_TYPE_COUNTER, with a pointer
to a struct mlx5_fc.
Also, MLX5_FLOW_CONTEXT_ACTION_COUNT bit should be set in the action.

Signed-off-by: default avatarAmir Vadai <amirva@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9dc0b289

drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c

+30 −6
Original line number Diff line number Diff line
@@ -241,17 +241,20 @@ static int mlx5_cmd_set_fte(struct mlx5_core_dev *dev, 
	MLX5_SET(flow_context, in_flow_context, group_id, group_id);

	MLX5_SET(flow_context, in_flow_context, flow_tag, fte->flow_tag);

	MLX5_SET(flow_context, in_flow_context, action, fte->action);

	MLX5_SET(flow_context, in_flow_context, destination_list_size,

		 fte->dests_size);

	in_match_value = MLX5_ADDR_OF(flow_context, in_flow_context,

				      match_value);

	memcpy(in_match_value, &fte->val, MLX5_ST_SZ_BYTES(fte_match_param));



	if (fte->action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {

	in_dests = MLX5_ADDR_OF(flow_context, in_flow_context, destination);

	if (fte->action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {

		int list_size = 0;



		list_for_each_entry(dst, &fte->node.children, node.list) {

			unsigned int id;



			if (dst->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_COUNTER)

				continue;



			MLX5_SET(dest_format_struct, in_dests, destination_type,

				 dst->dest_attr.type);

			if (dst->dest_attr.type ==
@@ -262,8 +265,31 @@ static int mlx5_cmd_set_fte(struct mlx5_core_dev *dev, 
			}

			MLX5_SET(dest_format_struct, in_dests, destination_id, id);

			in_dests += MLX5_ST_SZ_BYTES(dest_format_struct);

			list_size++;

		}



		MLX5_SET(flow_context, in_flow_context, destination_list_size,

			 list_size);

	}



	if (fte->action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {

		int list_size = 0;



		list_for_each_entry(dst, &fte->node.children, node.list) {

			if (dst->dest_attr.type !=

			    MLX5_FLOW_DESTINATION_TYPE_COUNTER)

				continue;



			MLX5_SET(flow_counter_list, in_dests, flow_counter_id,

				 dst->dest_attr.counter->id);

			in_dests += MLX5_ST_SZ_BYTES(dest_format_struct);

			list_size++;

		}



		MLX5_SET(flow_context, in_flow_context, flow_counter_list_size,

			 list_size);

	}



	memset(out, 0, sizeof(out));

	err = mlx5_cmd_exec_check_status(dev, in, inlen, out,

					 sizeof(out));
@@ -283,18 +309,16 @@ int mlx5_cmd_create_fte(struct mlx5_core_dev *dev, 
int mlx5_cmd_update_fte(struct mlx5_core_dev *dev,

			struct mlx5_flow_table *ft,

			unsigned group_id,

			int modify_mask,

			struct fs_fte *fte)

{

	int opmod;

	int modify_mask;

	int atomic_mod_cap = MLX5_CAP_FLOWTABLE(dev,

						flow_table_properties_nic_receive.

						flow_modify_en);

	if (!atomic_mod_cap)

		return -ENOTSUPP;

	opmod = 1;

	modify_mask = 1 <<

		MLX5_SET_FTE_MODIFY_ENABLE_MASK_DESTINATION_LIST;



	return	mlx5_cmd_set_fte(dev, opmod, modify_mask, ft, group_id, fte);

}

drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.h

+1 −0
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ int mlx5_cmd_create_fte(struct mlx5_core_dev *dev, 
int mlx5_cmd_update_fte(struct mlx5_core_dev *dev,

			struct mlx5_flow_table *ft,

			unsigned group_id,

			int modify_mask,

			struct fs_fte *fte);



int mlx5_cmd_delete_fte(struct mlx5_core_dev *dev,

drivers/net/ethernet/mellanox/mlx5/core/fs_core.c

+48 −4
Original line number Diff line number Diff line
@@ -344,6 +344,7 @@ static void del_rule(struct fs_node *node) 
	struct mlx5_flow_group *fg;

	struct fs_fte *fte;

	u32	*match_value;

	int modify_mask;

	struct mlx5_core_dev *dev = get_dev(node);

	int match_len = MLX5_ST_SZ_BYTES(fte_match_param);

	int err;
@@ -367,8 +368,11 @@ static void del_rule(struct fs_node *node) 
	}

	if ((fte->action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) &&

	    --fte->dests_size) {

		modify_mask = BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_DESTINATION_LIST),

		err = mlx5_cmd_update_fte(dev, ft,

					  fg->id, fte);

					  fg->id,

					  modify_mask,

					  fte);

		if (err)

			pr_warn("%s can't del rule fg id=%d fte_index=%d\n",

				__func__, fg->id, fte->index);
@@ -615,6 +619,7 @@ int mlx5_modify_rule_destination(struct mlx5_flow_rule *rule, 
	struct mlx5_flow_table *ft;

	struct mlx5_flow_group *fg;

	struct fs_fte *fte;

	int modify_mask = BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_DESTINATION_LIST);

	int err = 0;



	fs_get_obj(fte, rule->node.parent);
@@ -626,7 +631,9 @@ int mlx5_modify_rule_destination(struct mlx5_flow_rule *rule, 


	memcpy(&rule->dest_attr, dest, sizeof(*dest));

	err = mlx5_cmd_update_fte(get_dev(&ft->node),

				  ft, fg->id, fte);

				  ft, fg->id,

				  modify_mask,

				  fte);

	unlock_ref_node(&fte->node);



	return err;
@@ -877,6 +884,7 @@ static struct mlx5_flow_rule *add_rule_fte(struct fs_fte *fte, 
{

	struct mlx5_flow_table *ft;

	struct mlx5_flow_rule *rule;

	int modify_mask = 0;

	int err;



	rule = alloc_rule(dest);
@@ -892,14 +900,20 @@ static struct mlx5_flow_rule *add_rule_fte(struct fs_fte *fte, 
		list_add(&rule->node.list, &fte->node.children);

	else

		list_add_tail(&rule->node.list, &fte->node.children);

	if (dest)

	if (dest) {

		fte->dests_size++;



		modify_mask |= dest->type == MLX5_FLOW_DESTINATION_TYPE_COUNTER ?

			BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_FLOW_COUNTERS) :

			BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_DESTINATION_LIST);

	}



	if (fte->dests_size == 1 || !dest)

		err = mlx5_cmd_create_fte(get_dev(&ft->node),

					  ft, fg->id, fte);

	else

		err = mlx5_cmd_update_fte(get_dev(&ft->node),

					  ft, fg->id, fte);

					  ft, fg->id, modify_mask, fte);

	if (err)

		goto free_rule;
@@ -1092,10 +1106,40 @@ unlock_fg: 
	return rule;

}



struct mlx5_fc *mlx5_flow_rule_counter(struct mlx5_flow_rule *rule)

{

	struct mlx5_flow_rule *dst;

	struct fs_fte *fte;



	fs_get_obj(fte, rule->node.parent);



	fs_for_each_dst(dst, fte) {

		if (dst->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_COUNTER)

			return dst->dest_attr.counter;

	}



	return NULL;

}



static bool counter_is_valid(struct mlx5_fc *counter, u32 action)

{

	if (!(action & MLX5_FLOW_CONTEXT_ACTION_COUNT))

		return !counter;



	if (!counter)

		return false;



	/* Hardware support counter for a drop action only */

	return action == (MLX5_FLOW_CONTEXT_ACTION_DROP | MLX5_FLOW_CONTEXT_ACTION_COUNT);

}



static bool dest_is_valid(struct mlx5_flow_destination *dest,

			  u32 action,

			  struct mlx5_flow_table *ft)

{

	if (dest && (dest->type == MLX5_FLOW_DESTINATION_TYPE_COUNTER))

		return counter_is_valid(dest->counter, action);



	if (!(action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST))

		return true;

drivers/net/ethernet/mellanox/mlx5/core/fs_core.h

+23 −0
Original line number Diff line number Diff line
@@ -96,6 +96,28 @@ struct mlx5_flow_table { 
	struct list_head		fwd_rules;

};



struct mlx5_fc_cache {

	u64 packets;

	u64 bytes;

	u64 lastuse;

};



struct mlx5_fc {

	struct list_head list;



	/* last{packets,bytes} members are used when calculating the delta since

	 * last reading

	 */

	u64 lastpackets;

	u64 lastbytes;



	u16 id;

	bool deleted;

	bool aging;



	struct mlx5_fc_cache cache ____cacheline_aligned_in_smp;

};



/* Type of children is mlx5_flow_rule */

struct fs_fte {

	struct fs_node			node;
@@ -105,6 +127,7 @@ struct fs_fte { 
	u32				index;

	u32				action;

	enum fs_fte_status		status;

	struct mlx5_fc			*counter;

};



/* Type of children is mlx5_flow_table/namespace */

include/linux/mlx5/fs.h

+2 −0
Original line number Diff line number Diff line
@@ -73,6 +73,7 @@ struct mlx5_flow_destination { 
		u32			tir_num;

		struct mlx5_flow_table	*ft;

		u32			vport_num;

		struct mlx5_fc		*counter;

	};

};
@@ -125,4 +126,5 @@ void mlx5_del_flow_rule(struct mlx5_flow_rule *fr); 
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);

#endif

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