[deliverable/linux.git] / drivers / net / ethernet / mellanox / mlx5 / core / en_tc.c

/*
 * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <net/flow_dissector.h>
#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_skbedit.h>
#include <linux/mlx5/fs.h>
#include <linux/mlx5/device.h>
#include <linux/rhashtable.h>
#include "en.h"
#include "en_tc.h"

struct mlx5e_tc_flow {
	struct rhash_head	node;
	u64			cookie;
	struct mlx5_flow_rule	*rule;
};

#define MLX5E_TC_TABLE_NUM_ENTRIES 1024
#define MLX5E_TC_TABLE_NUM_GROUPS 4

static struct mlx5_flow_rule *mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
						    struct mlx5_flow_spec *spec,
						    u32 action, u32 flow_tag)
{
	struct mlx5_core_dev *dev = priv->mdev;
	struct mlx5_flow_destination dest = { 0 };
	struct mlx5_fc *counter = NULL;
	struct mlx5_flow_rule *rule;
	bool table_created = false;

	if (action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
		dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
		dest.ft = priv->fs.vlan.ft.t;
	} else if (action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
		counter = mlx5_fc_create(dev, true);
		if (IS_ERR(counter))
			return ERR_CAST(counter);

		dest.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
		dest.counter = counter;
	}

	if (IS_ERR_OR_NULL(priv->fs.tc.t)) {
		priv->fs.tc.t =
			mlx5_create_auto_grouped_flow_table(priv->fs.ns,
							    MLX5E_TC_PRIO,
							    MLX5E_TC_TABLE_NUM_ENTRIES,
							    MLX5E_TC_TABLE_NUM_GROUPS,
							    0);
		if (IS_ERR(priv->fs.tc.t)) {
			netdev_err(priv->netdev,
				   "Failed to create tc offload table\n");
			rule = ERR_CAST(priv->fs.tc.t);
			goto err_create_ft;
		}

		table_created = true;
	}

	spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
	rule = mlx5_add_flow_rule(priv->fs.tc.t, spec,
				  action, flow_tag,
				  &dest);

	if (IS_ERR(rule))
		goto err_add_rule;

	return rule;

err_add_rule:
	if (table_created) {
		mlx5_destroy_flow_table(priv->fs.tc.t);
		priv->fs.tc.t = NULL;
	}
err_create_ft:
	mlx5_fc_destroy(dev, counter);

	return rule;
}

static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
			      struct mlx5_flow_rule *rule)
{
	struct mlx5_fc *counter = NULL;

	counter = mlx5_flow_rule_counter(rule);

	mlx5_del_flow_rule(rule);

	mlx5_fc_destroy(priv->mdev, counter);

	if (!mlx5e_tc_num_filters(priv) && (priv->fs.tc.t)) {
		mlx5_destroy_flow_table(priv->fs.tc.t);
		priv->fs.tc.t = NULL;
	}
}

static int parse_cls_flower(struct mlx5e_priv *priv, struct mlx5_flow_spec *spec,
			    struct tc_cls_flower_offload *f)
{
	void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
				       outer_headers);
	void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
				       outer_headers);
	u16 addr_type = 0;
	u8 ip_proto = 0;

	if (f->dissector->used_keys &
	    ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
	      BIT(FLOW_DISSECTOR_KEY_BASIC) |
	      BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
	      BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
	      BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
	      BIT(FLOW_DISSECTOR_KEY_PORTS))) {
		netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
			    f->dissector->used_keys);
		return -EOPNOTSUPP;
	}

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
		struct flow_dissector_key_control *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_BASIC,
						  f->key);
		addr_type = key->addr_type;
	}

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
		struct flow_dissector_key_basic *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_BASIC,
						  f->key);
		struct flow_dissector_key_basic *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_BASIC,
						  f->mask);
		ip_proto = key->ip_proto;

		MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
			 ntohs(mask->n_proto));
		MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
			 ntohs(key->n_proto));

		MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol,
			 mask->ip_proto);
		MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol,
			 key->ip_proto);
	}

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
		struct flow_dissector_key_eth_addrs *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ETH_ADDRS,
						  f->key);
		struct flow_dissector_key_eth_addrs *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ETH_ADDRS,
						  f->mask);

		ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
					     dmac_47_16),
				mask->dst);
		ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
					     dmac_47_16),
				key->dst);

		ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
					     smac_47_16),
				mask->src);
		ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
					     smac_47_16),
				key->src);
	}

	if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
		struct flow_dissector_key_ipv4_addrs *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_IPV4_ADDRS,
						  f->key);
		struct flow_dissector_key_ipv4_addrs *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_IPV4_ADDRS,
						  f->mask);

		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
				    src_ipv4_src_ipv6.ipv4_layout.ipv4),
		       &mask->src, sizeof(mask->src));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				    src_ipv4_src_ipv6.ipv4_layout.ipv4),
		       &key->src, sizeof(key->src));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
				    dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
		       &mask->dst, sizeof(mask->dst));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				    dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
		       &key->dst, sizeof(key->dst));
	}

	if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
		struct flow_dissector_key_ipv6_addrs *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_IPV6_ADDRS,
						  f->key);
		struct flow_dissector_key_ipv6_addrs *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_IPV6_ADDRS,
						  f->mask);

		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
				    src_ipv4_src_ipv6.ipv6_layout.ipv6),
		       &mask->src, sizeof(mask->src));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				    src_ipv4_src_ipv6.ipv6_layout.ipv6),
		       &key->src, sizeof(key->src));

		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
				    dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
		       &mask->dst, sizeof(mask->dst));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				    dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
		       &key->dst, sizeof(key->dst));
	}

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
		struct flow_dissector_key_ports *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_PORTS,
						  f->key);
		struct flow_dissector_key_ports *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_PORTS,
						  f->mask);
		switch (ip_proto) {
		case IPPROTO_TCP:
			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
				 tcp_sport, ntohs(mask->src));
			MLX5_SET(fte_match_set_lyr_2_4, headers_v,
				 tcp_sport, ntohs(key->src));

			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
				 tcp_dport, ntohs(mask->dst));
			MLX5_SET(fte_match_set_lyr_2_4, headers_v,
				 tcp_dport, ntohs(key->dst));
			break;

		case IPPROTO_UDP:
			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
				 udp_sport, ntohs(mask->src));
			MLX5_SET(fte_match_set_lyr_2_4, headers_v,
				 udp_sport, ntohs(key->src));

			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
				 udp_dport, ntohs(mask->dst));
			MLX5_SET(fte_match_set_lyr_2_4, headers_v,
				 udp_dport, ntohs(key->dst));
			break;
		default:
			netdev_err(priv->netdev,
				   "Only UDP and TCP transport are supported\n");
			return -EINVAL;
		}
	}

	return 0;
}

static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
				u32 *action, u32 *flow_tag)
{
	const struct tc_action *a;

	if (tc_no_actions(exts))
		return -EINVAL;

	*flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
	*action = 0;

	tc_for_each_action(a, exts) {
		/* Only support a single action per rule */
		if (*action)
			return -EINVAL;

		if (is_tcf_gact_shot(a)) {
			*action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
			if (MLX5_CAP_FLOWTABLE(priv->mdev,
					       flow_table_properties_nic_receive.flow_counter))
				*action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
			continue;
		}

		if (is_tcf_skbedit_mark(a)) {
			u32 mark = tcf_skbedit_mark(a);

			if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
				netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n",
					    mark);
				return -EINVAL;
			}

			*flow_tag = mark;
			*action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
			continue;
		}

		return -EINVAL;
	}

	return 0;
}

int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
			   struct tc_cls_flower_offload *f)
{
	struct mlx5e_tc_table *tc = &priv->fs.tc;
	int err = 0;
	u32 flow_tag;
	u32 action;
	struct mlx5e_tc_flow *flow;
	struct mlx5_flow_spec *spec;
	struct mlx5_flow_rule *old = NULL;

	flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
				      tc->ht_params);
	if (flow)
		old = flow->rule;
	else
		flow = kzalloc(sizeof(*flow), GFP_KERNEL);

	spec = mlx5_vzalloc(sizeof(*spec));
	if (!spec || !flow) {
		err = -ENOMEM;
		goto err_free;
	}

	flow->cookie = f->cookie;

	err = parse_cls_flower(priv, spec, f);
	if (err < 0)
		goto err_free;

	err = parse_tc_nic_actions(priv, f->exts, &action, &flow_tag);
	if (err < 0)
		goto err_free;

	flow->rule = mlx5e_tc_add_nic_flow(priv, spec, action, flow_tag);
	if (IS_ERR(flow->rule)) {
		err = PTR_ERR(flow->rule);
		goto err_free;
	}

	err = rhashtable_insert_fast(&tc->ht, &flow->node,
				     tc->ht_params);
	if (err)
		goto err_del_rule;

	if (old)
		mlx5e_tc_del_flow(priv, old);

	goto out;

err_del_rule:
	mlx5_del_flow_rule(flow->rule);

err_free:
	if (!old)
		kfree(flow);
out:
	kvfree(spec);
	return err;
}

int mlx5e_delete_flower(struct mlx5e_priv *priv,
			struct tc_cls_flower_offload *f)
{
	struct mlx5e_tc_flow *flow;
	struct mlx5e_tc_table *tc = &priv->fs.tc;

	flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
				      tc->ht_params);
	if (!flow)
		return -EINVAL;

	rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);

	mlx5e_tc_del_flow(priv, flow->rule);

	kfree(flow);

	return 0;
}

int mlx5e_stats_flower(struct mlx5e_priv *priv,
		       struct tc_cls_flower_offload *f)
{
	struct mlx5e_tc_table *tc = &priv->fs.tc;
	struct mlx5e_tc_flow *flow;
	struct tc_action *a;
	struct mlx5_fc *counter;
	u64 bytes;
	u64 packets;
	u64 lastuse;

	flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
				      tc->ht_params);
	if (!flow)
		return -EINVAL;

	counter = mlx5_flow_rule_counter(flow->rule);
	if (!counter)
		return 0;

	mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);

	tc_for_each_action(a, f->exts)
		tcf_action_stats_update(a, bytes, packets, lastuse);

	return 0;
}

static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
	.head_offset = offsetof(struct mlx5e_tc_flow, node),
	.key_offset = offsetof(struct mlx5e_tc_flow, cookie),
	.key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie),
	.automatic_shrinking = true,
};

int mlx5e_tc_init(struct mlx5e_priv *priv)
{
	struct mlx5e_tc_table *tc = &priv->fs.tc;

	tc->ht_params = mlx5e_tc_flow_ht_params;
	return rhashtable_init(&tc->ht, &tc->ht_params);
}

static void _mlx5e_tc_del_flow(void *ptr, void *arg)
{
	struct mlx5e_tc_flow *flow = ptr;
	struct mlx5e_priv *priv = arg;

	mlx5e_tc_del_flow(priv, flow->rule);
	kfree(flow);
}

void mlx5e_tc_cleanup(struct mlx5e_priv *priv)
{
	struct mlx5e_tc_table *tc = &priv->fs.tc;

	rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv);

	if (!IS_ERR_OR_NULL(tc->t)) {
		mlx5_destroy_flow_table(tc->t);
		tc->t = NULL;
	}
}
Commit	Line	Data
e8f887ac AV	1	/*
	2	* Copyright (c) 2016, Mellanox Technologies. All rights reserved.
	3	*
	4	* This software is available to you under a choice of one of two
	5	* licenses. You may choose to be licensed under the terms of the GNU
	6	* General Public License (GPL) Version 2, available from the file
	7	* COPYING in the main directory of this source tree, or the
	8	* OpenIB.org BSD license below:
	9	*
	10	* Redistribution and use in source and binary forms, with or
	11	* without modification, are permitted provided that the following
	12	* conditions are met:
	13	*
	14	* - Redistributions of source code must retain the above
	15	* copyright notice, this list of conditions and the following
	16	* disclaimer.
	17	*
	18	* - Redistributions in binary form must reproduce the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer in the documentation and/or other materials
	21	* provided with the distribution.
	22	*
	23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	27	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	28	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	29	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*/
	32
e3a2b7ed AV	33	#include <net/flow_dissector.h>
	34	#include <net/pkt_cls.h>
	35	#include <net/tc_act/tc_gact.h>
12185a9f	36	#include <net/tc_act/tc_skbedit.h>
e8f887ac AV	37	#include <linux/mlx5/fs.h>
	38	#include <linux/mlx5/device.h>
	39	#include <linux/rhashtable.h>
	40	#include "en.h"
	41	#include "en_tc.h"
	42
	43	struct mlx5e_tc_flow {
	44	struct rhash_head node;
	45	u64 cookie;
	46	struct mlx5_flow_rule *rule;
	47	};
	48
acff797c MG	49	#define MLX5E_TC_TABLE_NUM_ENTRIES 1024
acff797c MG	50	#define MLX5E_TC_TABLE_NUM_GROUPS 4
e8f887ac	51
5c40348c OG	52	static struct mlx5_flow_rule mlx5e_tc_add_nic_flow(struct mlx5e_priv priv,
	53	struct mlx5_flow_spec *spec,
	54	u32 action, u32 flow_tag)
e8f887ac	55	{
aad7e08d AV	56	struct mlx5_core_dev *dev = priv->mdev;
	57	struct mlx5_flow_destination dest = { 0 };
	58	struct mlx5_fc *counter = NULL;
e8f887ac AV	59	struct mlx5_flow_rule *rule;
	60	bool table_created = false;
	61
aad7e08d AV	62	if (action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
	63	dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
	64	dest.ft = priv->fs.vlan.ft.t;
55130287	65	} else if (action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
aad7e08d AV	66	counter = mlx5_fc_create(dev, true);
	67	if (IS_ERR(counter))
	68	return ERR_CAST(counter);
	69
	70	dest.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
	71	dest.counter = counter;
	72	}
	73
acff797c MG	74	if (IS_ERR_OR_NULL(priv->fs.tc.t)) {
	75	priv->fs.tc.t =
	76	mlx5_create_auto_grouped_flow_table(priv->fs.ns,
	77	MLX5E_TC_PRIO,
	78	MLX5E_TC_TABLE_NUM_ENTRIES,
	79	MLX5E_TC_TABLE_NUM_GROUPS,
d63cd286	80	0);
acff797c	81	if (IS_ERR(priv->fs.tc.t)) {
e8f887ac AV	82	netdev_err(priv->netdev,
e8f887ac AV	83	"Failed to create tc offload table\n");
aad7e08d AV	84	rule = ERR_CAST(priv->fs.tc.t);
aad7e08d AV	85	goto err_create_ft;
e8f887ac AV	86	}
	87
	88	table_created = true;
	89	}
	90
c5bb1730 MG	91	spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
c5bb1730 MG	92	rule = mlx5_add_flow_rule(priv->fs.tc.t, spec,
e8f887ac	93	action, flow_tag,
aad7e08d AV	94	&dest);
	95
	96	if (IS_ERR(rule))
	97	goto err_add_rule;
	98
	99	return rule;
e8f887ac	100
aad7e08d AV	101	err_add_rule:
aad7e08d AV	102	if (table_created) {
acff797c MG	103	mlx5_destroy_flow_table(priv->fs.tc.t);
acff797c MG	104	priv->fs.tc.t = NULL;
e8f887ac	105	}
aad7e08d AV	106	err_create_ft:
aad7e08d AV	107	mlx5_fc_destroy(dev, counter);
e8f887ac AV	108
	109	return rule;
	110	}
	111
	112	static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
	113	struct mlx5_flow_rule *rule)
	114	{
aad7e08d AV	115	struct mlx5_fc *counter = NULL;
	116
	117	counter = mlx5_flow_rule_counter(rule);
	118
e8f887ac AV	119	mlx5_del_flow_rule(rule);
e8f887ac AV	120
aad7e08d AV	121	mlx5_fc_destroy(priv->mdev, counter);
aad7e08d AV	122
5c40348c	123	if (!mlx5e_tc_num_filters(priv) && (priv->fs.tc.t)) {
acff797c MG	124	mlx5_destroy_flow_table(priv->fs.tc.t);
acff797c MG	125	priv->fs.tc.t = NULL;
e8f887ac AV	126	}
	127	}
	128
c5bb1730	129	static int parse_cls_flower(struct mlx5e_priv priv, struct mlx5_flow_spec spec,
e3a2b7ed AV	130	struct tc_cls_flower_offload *f)
e3a2b7ed AV	131	{
c5bb1730 MG	132	void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
	133	outer_headers);
	134	void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
	135	outer_headers);
e3a2b7ed AV	136	u16 addr_type = 0;
	137	u8 ip_proto = 0;
	138
	139	if (f->dissector->used_keys &
	140	~(BIT(FLOW_DISSECTOR_KEY_CONTROL) \|
	141	BIT(FLOW_DISSECTOR_KEY_BASIC) \|
	142	BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) \|
	143	BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) \|
	144	BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) \|
	145	BIT(FLOW_DISSECTOR_KEY_PORTS))) {
	146	netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
	147	f->dissector->used_keys);
	148	return -EOPNOTSUPP;
	149	}
	150
	151	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
	152	struct flow_dissector_key_control *key =
	153	skb_flow_dissector_target(f->dissector,
	154	FLOW_DISSECTOR_KEY_BASIC,
	155	f->key);
	156	addr_type = key->addr_type;
	157	}
	158
	159	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
	160	struct flow_dissector_key_basic *key =
	161	skb_flow_dissector_target(f->dissector,
	162	FLOW_DISSECTOR_KEY_BASIC,
	163	f->key);
	164	struct flow_dissector_key_basic *mask =
	165	skb_flow_dissector_target(f->dissector,
	166	FLOW_DISSECTOR_KEY_BASIC,
	167	f->mask);
	168	ip_proto = key->ip_proto;
	169
	170	MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
	171	ntohs(mask->n_proto));
	172	MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
	173	ntohs(key->n_proto));
	174
	175	MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol,
	176	mask->ip_proto);
	177	MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol,
	178	key->ip_proto);
	179	}
	180
	181	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
	182	struct flow_dissector_key_eth_addrs *key =
	183	skb_flow_dissector_target(f->dissector,
	184	FLOW_DISSECTOR_KEY_ETH_ADDRS,
	185	f->key);
	186	struct flow_dissector_key_eth_addrs *mask =
	187	skb_flow_dissector_target(f->dissector,
	188	FLOW_DISSECTOR_KEY_ETH_ADDRS,
	189	f->mask);
	190
	191	ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
	192	dmac_47_16),
	193	mask->dst);
	194	ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
	195	dmac_47_16),
	196	key->dst);
	197
	198	ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
	199	smac_47_16),
200	mask->src);
201	ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
202	smac_47_16),
203	key->src);
204	}
205
206	if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
207	struct flow_dissector_key_ipv4_addrs *key =
208	skb_flow_dissector_target(f->dissector,
209	FLOW_DISSECTOR_KEY_IPV4_ADDRS,
210	f->key);
211	struct flow_dissector_key_ipv4_addrs *mask =
212	skb_flow_dissector_target(f->dissector,
213	FLOW_DISSECTOR_KEY_IPV4_ADDRS,
214	f->mask);
215
216	memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
217	src_ipv4_src_ipv6.ipv4_layout.ipv4),
218	&mask->src, sizeof(mask->src));
219	memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
220	src_ipv4_src_ipv6.ipv4_layout.ipv4),
221	&key->src, sizeof(key->src));
222	memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
223	dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
224	&mask->dst, sizeof(mask->dst));
225	memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
226	dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
227	&key->dst, sizeof(key->dst));
228	}
229
230	if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
231	struct flow_dissector_key_ipv6_addrs *key =
232	skb_flow_dissector_target(f->dissector,
233	FLOW_DISSECTOR_KEY_IPV6_ADDRS,
234	f->key);
235	struct flow_dissector_key_ipv6_addrs *mask =
236	skb_flow_dissector_target(f->dissector,
237	FLOW_DISSECTOR_KEY_IPV6_ADDRS,
238	f->mask);
239
240	memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
241	src_ipv4_src_ipv6.ipv6_layout.ipv6),
242	&mask->src, sizeof(mask->src));
243	memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
244	src_ipv4_src_ipv6.ipv6_layout.ipv6),
245	&key->src, sizeof(key->src));
246
247	memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
248	dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
249	&mask->dst, sizeof(mask->dst));
250	memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
251	dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
252	&key->dst, sizeof(key->dst));
253	}
254
255	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
256	struct flow_dissector_key_ports *key =
257	skb_flow_dissector_target(f->dissector,
258	FLOW_DISSECTOR_KEY_PORTS,
259	f->key);
260	struct flow_dissector_key_ports *mask =
261	skb_flow_dissector_target(f->dissector,
262	FLOW_DISSECTOR_KEY_PORTS,
263	f->mask);
264	switch (ip_proto) {
265	case IPPROTO_TCP:
266	MLX5_SET(fte_match_set_lyr_2_4, headers_c,
267	tcp_sport, ntohs(mask->src));
268	MLX5_SET(fte_match_set_lyr_2_4, headers_v,
269	tcp_sport, ntohs(key->src));
270
271	MLX5_SET(fte_match_set_lyr_2_4, headers_c,
272	tcp_dport, ntohs(mask->dst));
273	MLX5_SET(fte_match_set_lyr_2_4, headers_v,
274	tcp_dport, ntohs(key->dst));
275	break;
276
277	case IPPROTO_UDP:
278	MLX5_SET(fte_match_set_lyr_2_4, headers_c,
279	udp_sport, ntohs(mask->src));
280	MLX5_SET(fte_match_set_lyr_2_4, headers_v,
281	udp_sport, ntohs(key->src));
282
283	MLX5_SET(fte_match_set_lyr_2_4, headers_c,
284	udp_dport, ntohs(mask->dst));
285	MLX5_SET(fte_match_set_lyr_2_4, headers_v,
286	udp_dport, ntohs(key->dst));
287	break;
288	default:
289	netdev_err(priv->netdev,
290	"Only UDP and TCP transport are supported\n");
291	return -EINVAL;
292	}
293	}
294
295	return 0;
296	}
297
5c40348c OG	298	static int parse_tc_nic_actions(struct mlx5e_priv priv, struct tcf_exts exts,
5c40348c OG	299	u32 action, u32 flow_tag)
e3a2b7ed AV	300	{
	301	const struct tc_action *a;
	302
	303	if (tc_no_actions(exts))
	304	return -EINVAL;
	305
	306	*flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
	307	*action = 0;
	308
	309	tc_for_each_action(a, exts) {
	310	/* Only support a single action per rule */
	311	if (*action)
	312	return -EINVAL;
	313
	314	if (is_tcf_gact_shot(a)) {
	315	*action \|= MLX5_FLOW_CONTEXT_ACTION_DROP;
aad7e08d AV	316	if (MLX5_CAP_FLOWTABLE(priv->mdev,
	317	flow_table_properties_nic_receive.flow_counter))
	318	*action \|= MLX5_FLOW_CONTEXT_ACTION_COUNT;
e3a2b7ed AV	319	continue;
	320	}
	321
	322	if (is_tcf_skbedit_mark(a)) {
	323	u32 mark = tcf_skbedit_mark(a);
	324
	325	if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
	326	netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n",
	327	mark);
	328	return -EINVAL;
	329	}
	330
	331	*flow_tag = mark;
	332	*action \|= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
	333	continue;
	334	}
	335
	336	return -EINVAL;
	337	}
	338
	339	return 0;
	340	}
	341
	342	int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
	343	struct tc_cls_flower_offload *f)
	344	{
acff797c	345	struct mlx5e_tc_table *tc = &priv->fs.tc;
e3a2b7ed AV	346	int err = 0;
	347	u32 flow_tag;
	348	u32 action;
	349	struct mlx5e_tc_flow *flow;
c5bb1730	350	struct mlx5_flow_spec *spec;
e3a2b7ed AV	351	struct mlx5_flow_rule *old = NULL;
	352
	353	flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
	354	tc->ht_params);
	355	if (flow)
	356	old = flow->rule;
	357	else
	358	flow = kzalloc(sizeof(*flow), GFP_KERNEL);
	359
c5bb1730 MG	360	spec = mlx5_vzalloc(sizeof(*spec));
c5bb1730 MG	361	if (!spec \|\| !flow) {
e3a2b7ed AV	362	err = -ENOMEM;
	363	goto err_free;
	364	}
	365
	366	flow->cookie = f->cookie;
	367
c5bb1730	368	err = parse_cls_flower(priv, spec, f);
e3a2b7ed AV	369	if (err < 0)
	370	goto err_free;
	371
5c40348c	372	err = parse_tc_nic_actions(priv, f->exts, &action, &flow_tag);
e3a2b7ed AV	373	if (err < 0)
	374	goto err_free;
	375
5c40348c	376	flow->rule = mlx5e_tc_add_nic_flow(priv, spec, action, flow_tag);
e3a2b7ed AV	377	if (IS_ERR(flow->rule)) {
e3a2b7ed AV	378	err = PTR_ERR(flow->rule);
5c40348c	379	goto err_free;
e3a2b7ed AV	380	}
e3a2b7ed AV	381
5c40348c OG	382	err = rhashtable_insert_fast(&tc->ht, &flow->node,
	383	tc->ht_params);
	384	if (err)
	385	goto err_del_rule;
	386
e3a2b7ed AV	387	if (old)
	388	mlx5e_tc_del_flow(priv, old);
	389
	390	goto out;
	391
5c40348c OG	392	err_del_rule:
5c40348c OG	393	mlx5_del_flow_rule(flow->rule);
e3a2b7ed AV	394
	395	err_free:
	396	if (!old)
	397	kfree(flow);
	398	out:
c5bb1730	399	kvfree(spec);
e3a2b7ed AV	400	return err;
	401	}
	402
	403	int mlx5e_delete_flower(struct mlx5e_priv *priv,
	404	struct tc_cls_flower_offload *f)
	405	{
	406	struct mlx5e_tc_flow *flow;
acff797c	407	struct mlx5e_tc_table *tc = &priv->fs.tc;
e3a2b7ed AV	408
	409	flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
	410	tc->ht_params);
	411	if (!flow)
	412	return -EINVAL;
	413
	414	rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);
	415
	416	mlx5e_tc_del_flow(priv, flow->rule);
	417
	418	kfree(flow);
	419
	420	return 0;
	421	}
	422
aad7e08d AV	423	int mlx5e_stats_flower(struct mlx5e_priv *priv,
	424	struct tc_cls_flower_offload *f)
	425	{
	426	struct mlx5e_tc_table *tc = &priv->fs.tc;
	427	struct mlx5e_tc_flow *flow;
	428	struct tc_action *a;
	429	struct mlx5_fc *counter;
	430	u64 bytes;
	431	u64 packets;
	432	u64 lastuse;
	433
	434	flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
	435	tc->ht_params);
	436	if (!flow)
	437	return -EINVAL;
	438
	439	counter = mlx5_flow_rule_counter(flow->rule);
	440	if (!counter)
	441	return 0;
	442
	443	mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
	444
	445	tc_for_each_action(a, f->exts)
	446	tcf_action_stats_update(a, bytes, packets, lastuse);
	447
	448	return 0;
	449	}
	450
e8f887ac AV	451	static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
	452	.head_offset = offsetof(struct mlx5e_tc_flow, node),
	453	.key_offset = offsetof(struct mlx5e_tc_flow, cookie),
	454	.key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie),
	455	.automatic_shrinking = true,
	456	};
	457
	458	int mlx5e_tc_init(struct mlx5e_priv *priv)
	459	{
acff797c	460	struct mlx5e_tc_table *tc = &priv->fs.tc;
e8f887ac AV	461
	462	tc->ht_params = mlx5e_tc_flow_ht_params;
	463	return rhashtable_init(&tc->ht, &tc->ht_params);
	464	}
	465
	466	static void _mlx5e_tc_del_flow(void ptr, void arg)
	467	{
	468	struct mlx5e_tc_flow *flow = ptr;
	469	struct mlx5e_priv *priv = arg;
	470
	471	mlx5e_tc_del_flow(priv, flow->rule);
	472	kfree(flow);
	473	}
	474
	475	void mlx5e_tc_cleanup(struct mlx5e_priv *priv)
	476	{
acff797c	477	struct mlx5e_tc_table *tc = &priv->fs.tc;
e8f887ac AV	478
	479	rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv);
	480
acff797c MG	481	if (!IS_ERR_OR_NULL(tc->t)) {
	482	mlx5_destroy_flow_table(tc->t);
	483	tc->t = NULL;
e8f887ac AV	484	}
e8f887ac AV	485	}