[mirror_ubuntu-bionic-kernel.git] / drivers / net / ethernet / netronome / nfp / flower / offload.c

/*
 * Copyright (C) 2017 Netronome Systems, Inc.
 *
 * This software is dual licensed under the GNU General License Version 2,
 * June 1991 as shown in the file COPYING in the top-level directory of this
 * source tree or the BSD 2-Clause License provided below.  You have the
 * option to license this software under the complete terms of either license.
 *
 * The BSD 2-Clause License:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      1. Redistributions of source code must retain the above
 *         copyright notice, this list of conditions and the following
 *         disclaimer.
 *
 *      2. 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 <linux/skbuff.h>
#include <net/devlink.h>
#include <net/pkt_cls.h>

#include "cmsg.h"
#include "main.h"
#include "../nfpcore/nfp_cpp.h"
#include "../nfpcore/nfp_nsp.h"
#include "../nfp_app.h"
#include "../nfp_main.h"
#include "../nfp_net.h"
#include "../nfp_port.h"

static int
nfp_flower_xmit_flow(struct net_device *netdev,
		     struct nfp_fl_payload *nfp_flow, u8 mtype)
{
	u32 meta_len, key_len, mask_len, act_len, tot_len;
	struct nfp_repr *priv = netdev_priv(netdev);
	struct sk_buff *skb;
	unsigned char *msg;

	meta_len =  sizeof(struct nfp_fl_rule_metadata);
	key_len = nfp_flow->meta.key_len;
	mask_len = nfp_flow->meta.mask_len;
	act_len = nfp_flow->meta.act_len;

	tot_len = meta_len + key_len + mask_len + act_len;

	/* Convert to long words as firmware expects
	 * lengths in units of NFP_FL_LW_SIZ.
	 */
	nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ;
	nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ;
	nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ;

	skb = nfp_flower_cmsg_alloc(priv->app, tot_len, mtype);
	if (!skb)
		return -ENOMEM;

	msg = nfp_flower_cmsg_get_data(skb);
	memcpy(msg, &nfp_flow->meta, meta_len);
	memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len);
	memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len);
	memcpy(&msg[meta_len + key_len + mask_len],
	       nfp_flow->action_data, act_len);

	/* Convert back to bytes as software expects
	 * lengths in units of bytes.
	 */
	nfp_flow->meta.key_len <<= NFP_FL_LW_SIZ;
	nfp_flow->meta.mask_len <<= NFP_FL_LW_SIZ;
	nfp_flow->meta.act_len <<= NFP_FL_LW_SIZ;

	nfp_ctrl_tx(priv->app->ctrl, skb);

	return 0;
}

static bool nfp_flower_check_higher_than_mac(struct tc_cls_flower_offload *f)
{
	return dissector_uses_key(f->dissector,
				  FLOW_DISSECTOR_KEY_IPV4_ADDRS) ||
		dissector_uses_key(f->dissector,
				   FLOW_DISSECTOR_KEY_IPV6_ADDRS) ||
		dissector_uses_key(f->dissector,
				   FLOW_DISSECTOR_KEY_PORTS) ||
		dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ICMP);
}

static int
nfp_flower_calculate_key_layers(struct nfp_fl_key_ls *ret_key_ls,
				struct tc_cls_flower_offload *flow)
{
	struct flow_dissector_key_control *mask_enc_ctl;
	struct flow_dissector_key_basic *mask_basic;
	struct flow_dissector_key_basic *key_basic;
	u32 key_layer_two;
	u8 key_layer;
	int key_size;

	mask_enc_ctl = skb_flow_dissector_target(flow->dissector,
						 FLOW_DISSECTOR_KEY_ENC_CONTROL,
						 flow->mask);

	mask_basic = skb_flow_dissector_target(flow->dissector,
					       FLOW_DISSECTOR_KEY_BASIC,
					       flow->mask);

	key_basic = skb_flow_dissector_target(flow->dissector,
					      FLOW_DISSECTOR_KEY_BASIC,
					      flow->key);
	key_layer_two = 0;
	key_layer = NFP_FLOWER_LAYER_PORT | NFP_FLOWER_LAYER_MAC;
	key_size = sizeof(struct nfp_flower_meta_one) +
		   sizeof(struct nfp_flower_in_port) +
		   sizeof(struct nfp_flower_mac_mpls);

	/* We are expecting a tunnel. For now we ignore offloading. */
	if (mask_enc_ctl->addr_type)
		return -EOPNOTSUPP;

	if (mask_basic->n_proto) {
		/* Ethernet type is present in the key. */
		switch (key_basic->n_proto) {
		case cpu_to_be16(ETH_P_IP):
			key_layer |= NFP_FLOWER_LAYER_IPV4;
			key_size += sizeof(struct nfp_flower_ipv4);
			break;

		case cpu_to_be16(ETH_P_IPV6):
			key_layer |= NFP_FLOWER_LAYER_IPV6;
			key_size += sizeof(struct nfp_flower_ipv6);
			break;

		/* Currently we do not offload ARP
		 * because we rely on it to get to the host.
		 */
		case cpu_to_be16(ETH_P_ARP):
			return -EOPNOTSUPP;

		/* Will be included in layer 2. */
		case cpu_to_be16(ETH_P_8021Q):
			break;

		default:
			/* Other ethtype - we need check the masks for the
			 * remainder of the key to ensure we can offload.
			 */
			if (nfp_flower_check_higher_than_mac(flow))
				return -EOPNOTSUPP;
			break;
		}
	}

	if (mask_basic->ip_proto) {
		/* Ethernet type is present in the key. */
		switch (key_basic->ip_proto) {
		case IPPROTO_TCP:
		case IPPROTO_UDP:
		case IPPROTO_SCTP:
		case IPPROTO_ICMP:
		case IPPROTO_ICMPV6:
			key_layer |= NFP_FLOWER_LAYER_TP;
			key_size += sizeof(struct nfp_flower_tp_ports);
			break;
		default:
			/* Other ip proto - we need check the masks for the
			 * remainder of the key to ensure we can offload.
			 */
			return -EOPNOTSUPP;
		}
	}

	ret_key_ls->key_layer = key_layer;
	ret_key_ls->key_layer_two = key_layer_two;
	ret_key_ls->key_size = key_size;

	return 0;
}

static struct nfp_fl_payload *
nfp_flower_allocate_new(struct nfp_fl_key_ls *key_layer)
{
	struct nfp_fl_payload *flow_pay;

	flow_pay = kmalloc(sizeof(*flow_pay), GFP_KERNEL);
	if (!flow_pay)
		return NULL;

	flow_pay->meta.key_len = key_layer->key_size;
	flow_pay->unmasked_data = kmalloc(key_layer->key_size, GFP_KERNEL);
	if (!flow_pay->unmasked_data)
		goto err_free_flow;

	flow_pay->meta.mask_len = key_layer->key_size;
	flow_pay->mask_data = kmalloc(key_layer->key_size, GFP_KERNEL);
	if (!flow_pay->mask_data)
		goto err_free_unmasked;

	flow_pay->action_data = kmalloc(NFP_FL_MAX_A_SIZ, GFP_KERNEL);
	if (!flow_pay->action_data)
		goto err_free_mask;

	flow_pay->meta.flags = 0;
	spin_lock_init(&flow_pay->lock);

	return flow_pay;

err_free_mask:
	kfree(flow_pay->mask_data);
err_free_unmasked:
	kfree(flow_pay->unmasked_data);
err_free_flow:
	kfree(flow_pay);
	return NULL;
}

/**
 * nfp_flower_add_offload() - Adds a new flow to hardware.
 * @app:	Pointer to the APP handle
 * @netdev:	netdev structure.
 * @flow:	TC flower classifier offload structure.
 *
 * Adds a new flow to the repeated hash structure and action payload.
 *
 * Return: negative value on error, 0 if configured successfully.
 */
static int
nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
		       struct tc_cls_flower_offload *flow)
{
	struct nfp_flower_priv *priv = app->priv;
	struct nfp_fl_payload *flow_pay;
	struct nfp_fl_key_ls *key_layer;
	int err;

	key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL);
	if (!key_layer)
		return -ENOMEM;

	err = nfp_flower_calculate_key_layers(key_layer, flow);
	if (err)
		goto err_free_key_ls;

	flow_pay = nfp_flower_allocate_new(key_layer);
	if (!flow_pay) {
		err = -ENOMEM;
		goto err_free_key_ls;
	}

	err = nfp_flower_compile_flow_match(flow, key_layer, netdev, flow_pay);
	if (err)
		goto err_destroy_flow;

	err = nfp_flower_compile_action(flow, netdev, flow_pay);
	if (err)
		goto err_destroy_flow;

	err = nfp_compile_flow_metadata(app, flow, flow_pay);
	if (err)
		goto err_destroy_flow;

	err = nfp_flower_xmit_flow(netdev, flow_pay,
				   NFP_FLOWER_CMSG_TYPE_FLOW_ADD);
	if (err)
		goto err_destroy_flow;

	INIT_HLIST_NODE(&flow_pay->link);
	flow_pay->tc_flower_cookie = flow->cookie;
	hash_add_rcu(priv->flow_table, &flow_pay->link, flow->cookie);

	/* Deallocate flow payload when flower rule has been destroyed. */
	kfree(key_layer);

	return 0;

err_destroy_flow:
	kfree(flow_pay->action_data);
	kfree(flow_pay->mask_data);
	kfree(flow_pay->unmasked_data);
	kfree(flow_pay);
err_free_key_ls:
	kfree(key_layer);
	return err;
}

/**
 * nfp_flower_del_offload() - Removes a flow from hardware.
 * @app:	Pointer to the APP handle
 * @netdev:	netdev structure.
 * @flow:	TC flower classifier offload structure
 *
 * Removes a flow from the repeated hash structure and clears the
 * action payload.
 *
 * Return: negative value on error, 0 if removed successfully.
 */
static int
nfp_flower_del_offload(struct nfp_app *app, struct net_device *netdev,
		       struct tc_cls_flower_offload *flow)
{
	struct nfp_fl_payload *nfp_flow;
	int err;

	nfp_flow = nfp_flower_search_fl_table(app, flow->cookie);
	if (!nfp_flow)
		return -ENOENT;

	err = nfp_modify_flow_metadata(app, nfp_flow);
	if (err)
		goto err_free_flow;

	err = nfp_flower_xmit_flow(netdev, nfp_flow,
				   NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
	if (err)
		goto err_free_flow;

err_free_flow:
	hash_del_rcu(&nfp_flow->link);
	kfree(nfp_flow->action_data);
	kfree(nfp_flow->mask_data);
	kfree(nfp_flow->unmasked_data);
	kfree_rcu(nfp_flow, rcu);
	return err;
}

/**
 * nfp_flower_get_stats() - Populates flow stats obtained from hardware.
 * @app:	Pointer to the APP handle
 * @flow:	TC flower classifier offload structure
 *
 * Populates a flow statistics structure which which corresponds to a
 * specific flow.
 *
 * Return: negative value on error, 0 if stats populated successfully.
 */
static int
nfp_flower_get_stats(struct nfp_app *app, struct tc_cls_flower_offload *flow)
{
	struct nfp_fl_payload *nfp_flow;

	nfp_flow = nfp_flower_search_fl_table(app, flow->cookie);
	if (!nfp_flow)
		return -EINVAL;

	spin_lock_bh(&nfp_flow->lock);
	tcf_exts_stats_update(flow->exts, nfp_flow->stats.bytes,
			      nfp_flow->stats.pkts, nfp_flow->stats.used);

	nfp_flow->stats.pkts = 0;
	nfp_flow->stats.bytes = 0;
	spin_unlock_bh(&nfp_flow->lock);

	return 0;
}

static int
nfp_flower_repr_offload(struct nfp_app *app, struct net_device *netdev,
			struct tc_cls_flower_offload *flower)
{
	switch (flower->command) {
	case TC_CLSFLOWER_REPLACE:
		return nfp_flower_add_offload(app, netdev, flower);
	case TC_CLSFLOWER_DESTROY:
		return nfp_flower_del_offload(app, netdev, flower);
	case TC_CLSFLOWER_STATS:
		return nfp_flower_get_stats(app, flower);
	}

	return -EOPNOTSUPP;
}

int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
			enum tc_setup_type type, u32 handle, __be16 proto,
			struct tc_to_netdev *tc)
{
	if (TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS))
		return -EOPNOTSUPP;

	if (!eth_proto_is_802_3(proto))
		return -EOPNOTSUPP;

	if (type != TC_SETUP_CLSFLOWER)
		return -EINVAL;

	return nfp_flower_repr_offload(app, netdev, tc->cls_flower);
}
Commit	Line	Data
8a276873 PJV	1	/*
	2	* Copyright (C) 2017 Netronome Systems, Inc.
	3	*
	4	* This software is dual licensed under the GNU General License Version 2,
	5	* June 1991 as shown in the file COPYING in the top-level directory of this
	6	* source tree or the BSD 2-Clause License provided below. You have the
	7	* option to license this software under the complete terms of either license.
	8	*
	9	* The BSD 2-Clause License:
	10	*
	11	* Redistribution and use in source and binary forms, with or
	12	* without modification, are permitted provided that the following
	13	* conditions are met:
	14	*
	15	* 1. Redistributions of source code must retain the above
	16	* copyright notice, this list of conditions and the following
	17	* disclaimer.
	18	*
	19	* 2. Redistributions in binary form must reproduce the above
	20	* copyright notice, this list of conditions and the following
	21	* disclaimer in the documentation and/or other materials
	22	* provided with the distribution.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	25	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	26	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	27	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	28	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	29	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	30	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	31	* SOFTWARE.
	32	*/
	33
	34	#include <linux/skbuff.h>
	35	#include <net/devlink.h>
	36	#include <net/pkt_cls.h>
	37
	38	#include "cmsg.h"
	39	#include "main.h"
	40	#include "../nfpcore/nfp_cpp.h"
	41	#include "../nfpcore/nfp_nsp.h"
	42	#include "../nfp_app.h"
	43	#include "../nfp_main.h"
	44	#include "../nfp_net.h"
	45	#include "../nfp_port.h"
	46
81f3ddf2 PJV	47	static int
	48	nfp_flower_xmit_flow(struct net_device *netdev,
	49	struct nfp_fl_payload *nfp_flow, u8 mtype)
	50	{
	51	u32 meta_len, key_len, mask_len, act_len, tot_len;
	52	struct nfp_repr *priv = netdev_priv(netdev);
	53	struct sk_buff *skb;
	54	unsigned char *msg;
	55
	56	meta_len = sizeof(struct nfp_fl_rule_metadata);
	57	key_len = nfp_flow->meta.key_len;
	58	mask_len = nfp_flow->meta.mask_len;
	59	act_len = nfp_flow->meta.act_len;
	60
	61	tot_len = meta_len + key_len + mask_len + act_len;
	62
	63	/* Convert to long words as firmware expects
	64	* lengths in units of NFP_FL_LW_SIZ.
	65	*/
	66	nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ;
	67	nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ;
	68	nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ;
	69
	70	skb = nfp_flower_cmsg_alloc(priv->app, tot_len, mtype);
	71	if (!skb)
	72	return -ENOMEM;
	73
	74	msg = nfp_flower_cmsg_get_data(skb);
	75	memcpy(msg, &nfp_flow->meta, meta_len);
	76	memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len);
	77	memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len);
	78	memcpy(&msg[meta_len + key_len + mask_len],
	79	nfp_flow->action_data, act_len);
	80
	81	/* Convert back to bytes as software expects
	82	* lengths in units of bytes.
	83	*/
	84	nfp_flow->meta.key_len <<= NFP_FL_LW_SIZ;
	85	nfp_flow->meta.mask_len <<= NFP_FL_LW_SIZ;
	86	nfp_flow->meta.act_len <<= NFP_FL_LW_SIZ;
	87
	88	nfp_ctrl_tx(priv->app->ctrl, skb);
	89
	90	return 0;
	91	}
	92
af9d842c PJV	93	static bool nfp_flower_check_higher_than_mac(struct tc_cls_flower_offload *f)
	94	{
	95	return dissector_uses_key(f->dissector,
	96	FLOW_DISSECTOR_KEY_IPV4_ADDRS) \|\|
	97	dissector_uses_key(f->dissector,
	98	FLOW_DISSECTOR_KEY_IPV6_ADDRS) \|\|
	99	dissector_uses_key(f->dissector,
	100	FLOW_DISSECTOR_KEY_PORTS) \|\|
	101	dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ICMP);
	102	}
	103
	104	static int
	105	nfp_flower_calculate_key_layers(struct nfp_fl_key_ls *ret_key_ls,
	106	struct tc_cls_flower_offload *flow)
	107	{
	108	struct flow_dissector_key_control *mask_enc_ctl;
	109	struct flow_dissector_key_basic *mask_basic;
	110	struct flow_dissector_key_basic *key_basic;
	111	u32 key_layer_two;
	112	u8 key_layer;
	113	int key_size;
	114
	115	mask_enc_ctl = skb_flow_dissector_target(flow->dissector,
	116	FLOW_DISSECTOR_KEY_ENC_CONTROL,
	117	flow->mask);
	118
	119	mask_basic = skb_flow_dissector_target(flow->dissector,
	120	FLOW_DISSECTOR_KEY_BASIC,
	121	flow->mask);
	122
	123	key_basic = skb_flow_dissector_target(flow->dissector,
	124	FLOW_DISSECTOR_KEY_BASIC,
	125	flow->key);
	126	key_layer_two = 0;
	127	key_layer = NFP_FLOWER_LAYER_PORT \| NFP_FLOWER_LAYER_MAC;
	128	key_size = sizeof(struct nfp_flower_meta_one) +
	129	sizeof(struct nfp_flower_in_port) +
	130	sizeof(struct nfp_flower_mac_mpls);
	131
	132	/* We are expecting a tunnel. For now we ignore offloading. */
	133	if (mask_enc_ctl->addr_type)
	134	return -EOPNOTSUPP;
	135
	136	if (mask_basic->n_proto) {
	137	/* Ethernet type is present in the key. */
	138	switch (key_basic->n_proto) {
	139	case cpu_to_be16(ETH_P_IP):
	140	key_layer \|= NFP_FLOWER_LAYER_IPV4;
	141	key_size += sizeof(struct nfp_flower_ipv4);
	142	break;
	143
	144	case cpu_to_be16(ETH_P_IPV6):
	145	key_layer \|= NFP_FLOWER_LAYER_IPV6;
	146	key_size += sizeof(struct nfp_flower_ipv6);
	147	break;
	148
	149	/* Currently we do not offload ARP
	150	* because we rely on it to get to the host.
	151	*/
	152	case cpu_to_be16(ETH_P_ARP):
	153	return -EOPNOTSUPP;
	154
	155	/* Will be included in layer 2. */
	156	case cpu_to_be16(ETH_P_8021Q):
157	break;
158
159	default:
160	/* Other ethtype - we need check the masks for the
161	* remainder of the key to ensure we can offload.
162	*/
163	if (nfp_flower_check_higher_than_mac(flow))
164	return -EOPNOTSUPP;
165	break;
166	}
167	}
168
169	if (mask_basic->ip_proto) {
170	/* Ethernet type is present in the key. */
171	switch (key_basic->ip_proto) {
172	case IPPROTO_TCP:
173	case IPPROTO_UDP:
174	case IPPROTO_SCTP:
175	case IPPROTO_ICMP:
176	case IPPROTO_ICMPV6:
177	key_layer \|= NFP_FLOWER_LAYER_TP;
178	key_size += sizeof(struct nfp_flower_tp_ports);
179	break;
180	default:
181	/* Other ip proto - we need check the masks for the
182	* remainder of the key to ensure we can offload.
183	*/
184	return -EOPNOTSUPP;
185	}
186	}
187
188	ret_key_ls->key_layer = key_layer;
189	ret_key_ls->key_layer_two = key_layer_two;
190	ret_key_ls->key_size = key_size;
191
192	return 0;
193	}
194
195	static struct nfp_fl_payload *
196	nfp_flower_allocate_new(struct nfp_fl_key_ls *key_layer)
197	{
198	struct nfp_fl_payload *flow_pay;
199
200	flow_pay = kmalloc(sizeof(*flow_pay), GFP_KERNEL);
201	if (!flow_pay)
202	return NULL;
203
204	flow_pay->meta.key_len = key_layer->key_size;
205	flow_pay->unmasked_data = kmalloc(key_layer->key_size, GFP_KERNEL);
206	if (!flow_pay->unmasked_data)
207	goto err_free_flow;
208
209	flow_pay->meta.mask_len = key_layer->key_size;
210	flow_pay->mask_data = kmalloc(key_layer->key_size, GFP_KERNEL);
211	if (!flow_pay->mask_data)
212	goto err_free_unmasked;
213
1a1e586f PJV	214	flow_pay->action_data = kmalloc(NFP_FL_MAX_A_SIZ, GFP_KERNEL);
	215	if (!flow_pay->action_data)
	216	goto err_free_mask;
	217
af9d842c	218	flow_pay->meta.flags = 0;
abfcdc1d	219	spin_lock_init(&flow_pay->lock);
af9d842c PJV	220
	221	return flow_pay;
	222
1a1e586f PJV	223	err_free_mask:
1a1e586f PJV	224	kfree(flow_pay->mask_data);
af9d842c PJV	225	err_free_unmasked:
	226	kfree(flow_pay->unmasked_data);
	227	err_free_flow:
	228	kfree(flow_pay);
	229	return NULL;
	230	}
	231
8a276873 PJV	232	/**
	233	* nfp_flower_add_offload() - Adds a new flow to hardware.
	234	* @app: Pointer to the APP handle
	235	* @netdev: netdev structure.
	236	* @flow: TC flower classifier offload structure.
	237	*
	238	* Adds a new flow to the repeated hash structure and action payload.
	239	*
	240	* Return: negative value on error, 0 if configured successfully.
	241	*/
	242	static int
	243	nfp_flower_add_offload(struct nfp_app app, struct net_device netdev,
	244	struct tc_cls_flower_offload *flow)
	245	{
43f84b72	246	struct nfp_flower_priv *priv = app->priv;
af9d842c PJV	247	struct nfp_fl_payload *flow_pay;
	248	struct nfp_fl_key_ls *key_layer;
	249	int err;
	250
	251	key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL);
	252	if (!key_layer)
	253	return -ENOMEM;
	254
	255	err = nfp_flower_calculate_key_layers(key_layer, flow);
	256	if (err)
	257	goto err_free_key_ls;
	258
	259	flow_pay = nfp_flower_allocate_new(key_layer);
	260	if (!flow_pay) {
	261	err = -ENOMEM;
	262	goto err_free_key_ls;
	263	}
	264
5571e8c9 PJV	265	err = nfp_flower_compile_flow_match(flow, key_layer, netdev, flow_pay);
	266	if (err)
	267	goto err_destroy_flow;
	268
1a1e586f PJV	269	err = nfp_flower_compile_action(flow, netdev, flow_pay);
	270	if (err)
	271	goto err_destroy_flow;
	272
43f84b72 PJV	273	err = nfp_compile_flow_metadata(app, flow, flow_pay);
	274	if (err)
	275	goto err_destroy_flow;
	276
81f3ddf2 PJV	277	err = nfp_flower_xmit_flow(netdev, flow_pay,
	278	NFP_FLOWER_CMSG_TYPE_FLOW_ADD);
	279	if (err)
	280	goto err_destroy_flow;
	281
43f84b72 PJV	282	INIT_HLIST_NODE(&flow_pay->link);
	283	flow_pay->tc_flower_cookie = flow->cookie;
	284	hash_add_rcu(priv->flow_table, &flow_pay->link, flow->cookie);
	285
	286	/* Deallocate flow payload when flower rule has been destroyed. */
	287	kfree(key_layer);
	288
	289	return 0;
af9d842c	290
5571e8c9	291	err_destroy_flow:
1a1e586f	292	kfree(flow_pay->action_data);
af9d842c PJV	293	kfree(flow_pay->mask_data);
	294	kfree(flow_pay->unmasked_data);
	295	kfree(flow_pay);
af9d842c PJV	296	err_free_key_ls:
	297	kfree(key_layer);
	298	return err;
8a276873 PJV	299	}
	300
	301	/**
	302	* nfp_flower_del_offload() - Removes a flow from hardware.
	303	* @app: Pointer to the APP handle
	304	* @netdev: netdev structure.
	305	* @flow: TC flower classifier offload structure
	306	*
	307	* Removes a flow from the repeated hash structure and clears the
	308	* action payload.
	309	*
	310	* Return: negative value on error, 0 if removed successfully.
	311	*/
	312	static int
	313	nfp_flower_del_offload(struct nfp_app app, struct net_device netdev,
	314	struct tc_cls_flower_offload *flow)
	315	{
43f84b72 PJV	316	struct nfp_fl_payload *nfp_flow;
	317	int err;
	318
	319	nfp_flow = nfp_flower_search_fl_table(app, flow->cookie);
	320	if (!nfp_flow)
	321	return -ENOENT;
	322
	323	err = nfp_modify_flow_metadata(app, nfp_flow);
81f3ddf2 PJV	324	if (err)
81f3ddf2 PJV	325	goto err_free_flow;
43f84b72	326
81f3ddf2 PJV	327	err = nfp_flower_xmit_flow(netdev, nfp_flow,
	328	NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
	329	if (err)
	330	goto err_free_flow;
	331
	332	err_free_flow:
43f84b72 PJV	333	hash_del_rcu(&nfp_flow->link);
	334	kfree(nfp_flow->action_data);
	335	kfree(nfp_flow->mask_data);
	336	kfree(nfp_flow->unmasked_data);
	337	kfree_rcu(nfp_flow, rcu);
	338	return err;
8a276873 PJV	339	}
	340
	341	/**
	342	* nfp_flower_get_stats() - Populates flow stats obtained from hardware.
	343	* @app: Pointer to the APP handle
	344	* @flow: TC flower classifier offload structure
	345	*
	346	* Populates a flow statistics structure which which corresponds to a
	347	* specific flow.
	348	*
	349	* Return: negative value on error, 0 if stats populated successfully.
	350	*/
	351	static int
	352	nfp_flower_get_stats(struct nfp_app app, struct tc_cls_flower_offload flow)
	353	{
abfcdc1d PJV	354	struct nfp_fl_payload *nfp_flow;
	355
	356	nfp_flow = nfp_flower_search_fl_table(app, flow->cookie);
	357	if (!nfp_flow)
	358	return -EINVAL;
	359
	360	spin_lock_bh(&nfp_flow->lock);
	361	tcf_exts_stats_update(flow->exts, nfp_flow->stats.bytes,
	362	nfp_flow->stats.pkts, nfp_flow->stats.used);
	363
	364	nfp_flow->stats.pkts = 0;
	365	nfp_flow->stats.bytes = 0;
	366	spin_unlock_bh(&nfp_flow->lock);
	367
	368	return 0;
8a276873 PJV	369	}
	370
	371	static int
	372	nfp_flower_repr_offload(struct nfp_app app, struct net_device netdev,
	373	struct tc_cls_flower_offload *flower)
	374	{
	375	switch (flower->command) {
	376	case TC_CLSFLOWER_REPLACE:
	377	return nfp_flower_add_offload(app, netdev, flower);
	378	case TC_CLSFLOWER_DESTROY:
	379	return nfp_flower_del_offload(app, netdev, flower);
	380	case TC_CLSFLOWER_STATS:
	381	return nfp_flower_get_stats(app, flower);
	382	}
	383
	384	return -EOPNOTSUPP;
	385	}
	386
	387	int nfp_flower_setup_tc(struct nfp_app app, struct net_device netdev,
2572ac53 JP	388	enum tc_setup_type type, u32 handle, __be16 proto,
2572ac53 JP	389	struct tc_to_netdev *tc)
8a276873 PJV	390	{
	391	if (TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS))
	392	return -EOPNOTSUPP;
	393
	394	if (!eth_proto_is_802_3(proto))
	395	return -EOPNOTSUPP;
	396
2572ac53	397	if (type != TC_SETUP_CLSFLOWER)
8a276873 PJV	398	return -EINVAL;
	399
	400	return nfp_flower_repr_offload(app, netdev, tc->cls_flower);
	401	}