summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/netronome/nfp/flower/match.c
blob: 91935405f5861678077c188328d365ed5cb2ba7f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
/*
 * 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/bitfield.h>
#include <net/pkt_cls.h>

#include "cmsg.h"
#include "main.h"

static void
nfp_flower_compile_meta_tci(struct nfp_flower_meta_tci *frame,
			    struct tc_cls_flower_offload *flow, u8 key_type,
			    bool mask_version)
{
	struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
	struct flow_dissector_key_vlan *flow_vlan;
	u16 tmp_tci;

	memset(frame, 0, sizeof(struct nfp_flower_meta_tci));
	/* Populate the metadata frame. */
	frame->nfp_flow_key_layer = key_type;
	frame->mask_id = ~0;

	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
		flow_vlan = skb_flow_dissector_target(flow->dissector,
						      FLOW_DISSECTOR_KEY_VLAN,
						      target);
		/* Populate the tci field. */
		if (flow_vlan->vlan_id) {
			tmp_tci = FIELD_PREP(NFP_FLOWER_MASK_VLAN_PRIO,
					     flow_vlan->vlan_priority) |
				  FIELD_PREP(NFP_FLOWER_MASK_VLAN_VID,
					     flow_vlan->vlan_id) |
				  NFP_FLOWER_MASK_VLAN_CFI;
			frame->tci = cpu_to_be16(tmp_tci);
		}
	}
}

static void
nfp_flower_compile_ext_meta(struct nfp_flower_ext_meta *frame, u32 key_ext)
{
	frame->nfp_flow_key_layer2 = cpu_to_be32(key_ext);
}

static int
nfp_flower_compile_port(struct nfp_flower_in_port *frame, u32 cmsg_port,
			bool mask_version, enum nfp_flower_tun_type tun_type)
{
	if (mask_version) {
		frame->in_port = cpu_to_be32(~0);
		return 0;
	}

	if (tun_type)
		frame->in_port = cpu_to_be32(NFP_FL_PORT_TYPE_TUN | tun_type);
	else
		frame->in_port = cpu_to_be32(cmsg_port);

	return 0;
}

static void
nfp_flower_compile_mac(struct nfp_flower_mac_mpls *frame,
		       struct tc_cls_flower_offload *flow,
		       bool mask_version)
{
	struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
	struct flow_dissector_key_eth_addrs *addr;

	memset(frame, 0, sizeof(struct nfp_flower_mac_mpls));

	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
		addr = skb_flow_dissector_target(flow->dissector,
						 FLOW_DISSECTOR_KEY_ETH_ADDRS,
						 target);
		/* Populate mac frame. */
		ether_addr_copy(frame->mac_dst, &addr->dst[0]);
		ether_addr_copy(frame->mac_src, &addr->src[0]);
	}

	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_MPLS)) {
		struct flow_dissector_key_mpls *mpls;
		u32 t_mpls;

		mpls = skb_flow_dissector_target(flow->dissector,
						 FLOW_DISSECTOR_KEY_MPLS,
						 target);

		t_mpls = FIELD_PREP(NFP_FLOWER_MASK_MPLS_LB, mpls->mpls_label) |
			 FIELD_PREP(NFP_FLOWER_MASK_MPLS_TC, mpls->mpls_tc) |
			 FIELD_PREP(NFP_FLOWER_MASK_MPLS_BOS, mpls->mpls_bos) |
			 NFP_FLOWER_MASK_MPLS_Q;

		frame->mpls_lse = cpu_to_be32(t_mpls);
	}
}

static void
nfp_flower_compile_tport(struct nfp_flower_tp_ports *frame,
			 struct tc_cls_flower_offload *flow,
			 bool mask_version)
{
	struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
	struct flow_dissector_key_ports *tp;

	memset(frame, 0, sizeof(struct nfp_flower_tp_ports));

	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
		tp = skb_flow_dissector_target(flow->dissector,
					       FLOW_DISSECTOR_KEY_PORTS,
					       target);
		frame->port_src = tp->src;
		frame->port_dst = tp->dst;
	}
}

static void
nfp_flower_compile_ip_ext(struct nfp_flower_ip_ext *frame,
			  struct tc_cls_flower_offload *flow,
			  bool mask_version)
{
	struct fl_flow_key *target = mask_version ? flow->mask : flow->key;

	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
		struct flow_dissector_key_basic *basic;

		basic = skb_flow_dissector_target(flow->dissector,
						  FLOW_DISSECTOR_KEY_BASIC,
						  target);
		frame->proto = basic->ip_proto;
	}

	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_IP)) {
		struct flow_dissector_key_ip *flow_ip;

		flow_ip = skb_flow_dissector_target(flow->dissector,
						    FLOW_DISSECTOR_KEY_IP,
						    target);
		frame->tos = flow_ip->tos;
		frame->ttl = flow_ip->ttl;
	}

	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_TCP)) {
		struct flow_dissector_key_tcp *tcp;
		u32 tcp_flags;

		tcp = skb_flow_dissector_target(flow->dissector,
						FLOW_DISSECTOR_KEY_TCP, target);
		tcp_flags = be16_to_cpu(tcp->flags);

		if (tcp_flags & TCPHDR_FIN)
			frame->flags |= NFP_FL_TCP_FLAG_FIN;
		if (tcp_flags & TCPHDR_SYN)
			frame->flags |= NFP_FL_TCP_FLAG_SYN;
		if (tcp_flags & TCPHDR_RST)
			frame->flags |= NFP_FL_TCP_FLAG_RST;
		if (tcp_flags & TCPHDR_PSH)
			frame->flags |= NFP_FL_TCP_FLAG_PSH;
		if (tcp_flags & TCPHDR_URG)
			frame->flags |= NFP_FL_TCP_FLAG_URG;
	}

	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
		struct flow_dissector_key_control *key;

		key = skb_flow_dissector_target(flow->dissector,
						FLOW_DISSECTOR_KEY_CONTROL,
						target);
		if (key->flags & FLOW_DIS_IS_FRAGMENT)
			frame->flags |= NFP_FL_IP_FRAGMENTED;
		if (key->flags & FLOW_DIS_FIRST_FRAG)
			frame->flags |= NFP_FL_IP_FRAG_FIRST;
	}
}

static void
nfp_flower_compile_ipv4(struct nfp_flower_ipv4 *frame,
			struct tc_cls_flower_offload *flow,
			bool mask_version)
{
	struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
	struct flow_dissector_key_ipv4_addrs *addr;

	memset(frame, 0, sizeof(struct nfp_flower_ipv4));

	if (dissector_uses_key(flow->dissector,
			       FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
		addr = skb_flow_dissector_target(flow->dissector,
						 FLOW_DISSECTOR_KEY_IPV4_ADDRS,
						 target);
		frame->ipv4_src = addr->src;
		frame->ipv4_dst = addr->dst;
	}

	nfp_flower_compile_ip_ext(&frame->ip_ext, flow, mask_version);
}

static void
nfp_flower_compile_ipv6(struct nfp_flower_ipv6 *frame,
			struct tc_cls_flower_offload *flow,
			bool mask_version)
{
	struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
	struct flow_dissector_key_ipv6_addrs *addr;

	memset(frame, 0, sizeof(struct nfp_flower_ipv6));

	if (dissector_uses_key(flow->dissector,
			       FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
		addr = skb_flow_dissector_target(flow->dissector,
						 FLOW_DISSECTOR_KEY_IPV6_ADDRS,
						 target);
		frame->ipv6_src = addr->src;
		frame->ipv6_dst = addr->dst;
	}

	nfp_flower_compile_ip_ext(&frame->ip_ext, flow, mask_version);
}

static void
nfp_flower_compile_ipv4_udp_tun(struct nfp_flower_ipv4_udp_tun *frame,
				struct tc_cls_flower_offload *flow,
				bool mask_version)
{
	struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
	struct flow_dissector_key_ipv4_addrs *tun_ips;
	struct flow_dissector_key_keyid *vni;

	memset(frame, 0, sizeof(struct nfp_flower_ipv4_udp_tun));

	if (dissector_uses_key(flow->dissector,
			       FLOW_DISSECTOR_KEY_ENC_KEYID)) {
		u32 temp_vni;

		vni = skb_flow_dissector_target(flow->dissector,
						FLOW_DISSECTOR_KEY_ENC_KEYID,
						target);
		temp_vni = be32_to_cpu(vni->keyid) << NFP_FL_TUN_VNI_OFFSET;
		frame->tun_id = cpu_to_be32(temp_vni);
	}

	if (dissector_uses_key(flow->dissector,
			       FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
		tun_ips =
		   skb_flow_dissector_target(flow->dissector,
					     FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
					     target);
		frame->ip_src = tun_ips->src;
		frame->ip_dst = tun_ips->dst;
	}
}

int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow,
				  struct nfp_fl_key_ls *key_ls,
				  struct net_device *netdev,
				  struct nfp_fl_payload *nfp_flow,
				  enum nfp_flower_tun_type tun_type)
{
	struct nfp_repr *netdev_repr;
	int err;
	u8 *ext;
	u8 *msk;

	memset(nfp_flow->unmasked_data, 0, key_ls->key_size);
	memset(nfp_flow->mask_data, 0, key_ls->key_size);

	ext = nfp_flow->unmasked_data;
	msk = nfp_flow->mask_data;

	/* Populate Exact Metadata. */
	nfp_flower_compile_meta_tci((struct nfp_flower_meta_tci *)ext,
				    flow, key_ls->key_layer, false);
	/* Populate Mask Metadata. */
	nfp_flower_compile_meta_tci((struct nfp_flower_meta_tci *)msk,
				    flow, key_ls->key_layer, true);
	ext += sizeof(struct nfp_flower_meta_tci);
	msk += sizeof(struct nfp_flower_meta_tci);

	/* Populate Extended Metadata if Required. */
	if (NFP_FLOWER_LAYER_EXT_META & key_ls->key_layer) {
		nfp_flower_compile_ext_meta((struct nfp_flower_ext_meta *)ext,
					    key_ls->key_layer_two);
		nfp_flower_compile_ext_meta((struct nfp_flower_ext_meta *)msk,
					    key_ls->key_layer_two);
		ext += sizeof(struct nfp_flower_ext_meta);
		msk += sizeof(struct nfp_flower_ext_meta);
	}

	/* Populate Exact Port data. */
	err = nfp_flower_compile_port((struct nfp_flower_in_port *)ext,
				      nfp_repr_get_port_id(netdev),
				      false, tun_type);
	if (err)
		return err;

	/* Populate Mask Port Data. */
	err = nfp_flower_compile_port((struct nfp_flower_in_port *)msk,
				      nfp_repr_get_port_id(netdev),
				      true, tun_type);
	if (err)
		return err;

	ext += sizeof(struct nfp_flower_in_port);
	msk += sizeof(struct nfp_flower_in_port);

	if (NFP_FLOWER_LAYER_MAC & key_ls->key_layer) {
		/* Populate Exact MAC Data. */
		nfp_flower_compile_mac((struct nfp_flower_mac_mpls *)ext,
				       flow, false);
		/* Populate Mask MAC Data. */
		nfp_flower_compile_mac((struct nfp_flower_mac_mpls *)msk,
				       flow, true);
		ext += sizeof(struct nfp_flower_mac_mpls);
		msk += sizeof(struct nfp_flower_mac_mpls);
	}

	if (NFP_FLOWER_LAYER_TP & key_ls->key_layer) {
		/* Populate Exact TP Data. */
		nfp_flower_compile_tport((struct nfp_flower_tp_ports *)ext,
					 flow, false);
		/* Populate Mask TP Data. */
		nfp_flower_compile_tport((struct nfp_flower_tp_ports *)msk,
					 flow, true);
		ext += sizeof(struct nfp_flower_tp_ports);
		msk += sizeof(struct nfp_flower_tp_ports);
	}

	if (NFP_FLOWER_LAYER_IPV4 & key_ls->key_layer) {
		/* Populate Exact IPv4 Data. */
		nfp_flower_compile_ipv4((struct nfp_flower_ipv4 *)ext,
					flow, false);
		/* Populate Mask IPv4 Data. */
		nfp_flower_compile_ipv4((struct nfp_flower_ipv4 *)msk,
					flow, true);
		ext += sizeof(struct nfp_flower_ipv4);
		msk += sizeof(struct nfp_flower_ipv4);
	}

	if (NFP_FLOWER_LAYER_IPV6 & key_ls->key_layer) {
		/* Populate Exact IPv4 Data. */
		nfp_flower_compile_ipv6((struct nfp_flower_ipv6 *)ext,
					flow, false);
		/* Populate Mask IPv4 Data. */
		nfp_flower_compile_ipv6((struct nfp_flower_ipv6 *)msk,
					flow, true);
		ext += sizeof(struct nfp_flower_ipv6);
		msk += sizeof(struct nfp_flower_ipv6);
	}

	if (key_ls->key_layer & NFP_FLOWER_LAYER_VXLAN ||
	    key_ls->key_layer_two & NFP_FLOWER_LAYER2_GENEVE) {
		__be32 tun_dst;

		/* Populate Exact VXLAN Data. */
		nfp_flower_compile_ipv4_udp_tun((void *)ext, flow, false);
		/* Populate Mask VXLAN Data. */
		nfp_flower_compile_ipv4_udp_tun((void *)msk, flow, true);
		tun_dst = ((struct nfp_flower_ipv4_udp_tun *)ext)->ip_dst;
		ext += sizeof(struct nfp_flower_ipv4_udp_tun);
		msk += sizeof(struct nfp_flower_ipv4_udp_tun);

		/* Configure tunnel end point MAC. */
		if (nfp_netdev_is_nfp_repr(netdev)) {
			netdev_repr = netdev_priv(netdev);
			nfp_tunnel_write_macs(netdev_repr->app);

			/* Store the tunnel destination in the rule data.
			 * This must be present and be an exact match.
			 */
			nfp_flow->nfp_tun_ipv4_addr = tun_dst;
			nfp_tunnel_add_ipv4_off(netdev_repr->app, tun_dst);
		}
	}

	return 0;
}