1
2
3
4#include <linux/bitfield.h>
5#include <linux/netdevice.h>
6#include <linux/skbuff.h>
7#include <linux/workqueue.h>
8#include <net/dst_metadata.h>
9
10#include "main.h"
11#include "../nfp_net.h"
12#include "../nfp_net_repr.h"
13#include "./cmsg.h"
14
15static struct nfp_flower_cmsg_hdr *
16nfp_flower_cmsg_get_hdr(struct sk_buff *skb)
17{
18 return (struct nfp_flower_cmsg_hdr *)skb->data;
19}
20
21struct sk_buff *
22nfp_flower_cmsg_alloc(struct nfp_app *app, unsigned int size,
23 enum nfp_flower_cmsg_type_port type, gfp_t flag)
24{
25 struct nfp_flower_cmsg_hdr *ch;
26 struct sk_buff *skb;
27
28 size += NFP_FLOWER_CMSG_HLEN;
29
30 skb = nfp_app_ctrl_msg_alloc(app, size, flag);
31 if (!skb)
32 return NULL;
33
34 ch = nfp_flower_cmsg_get_hdr(skb);
35 ch->pad = 0;
36 ch->version = NFP_FLOWER_CMSG_VER1;
37 ch->type = type;
38 skb_put(skb, size);
39
40 return skb;
41}
42
43struct sk_buff *
44nfp_flower_cmsg_mac_repr_start(struct nfp_app *app, unsigned int num_ports)
45{
46 struct nfp_flower_cmsg_mac_repr *msg;
47 struct sk_buff *skb;
48
49 skb = nfp_flower_cmsg_alloc(app, struct_size(msg, ports, num_ports),
50 NFP_FLOWER_CMSG_TYPE_MAC_REPR, GFP_KERNEL);
51 if (!skb)
52 return NULL;
53
54 msg = nfp_flower_cmsg_get_data(skb);
55 memset(msg->reserved, 0, sizeof(msg->reserved));
56 msg->num_ports = num_ports;
57
58 return skb;
59}
60
61void
62nfp_flower_cmsg_mac_repr_add(struct sk_buff *skb, unsigned int idx,
63 unsigned int nbi, unsigned int nbi_port,
64 unsigned int phys_port)
65{
66 struct nfp_flower_cmsg_mac_repr *msg;
67
68 msg = nfp_flower_cmsg_get_data(skb);
69 msg->ports[idx].idx = idx;
70 msg->ports[idx].info = nbi & NFP_FLOWER_CMSG_MAC_REPR_NBI;
71 msg->ports[idx].nbi_port = nbi_port;
72 msg->ports[idx].phys_port = phys_port;
73}
74
75int nfp_flower_cmsg_portmod(struct nfp_repr *repr, bool carrier_ok,
76 unsigned int mtu, bool mtu_only)
77{
78 struct nfp_flower_cmsg_portmod *msg;
79 struct sk_buff *skb;
80
81 skb = nfp_flower_cmsg_alloc(repr->app, sizeof(*msg),
82 NFP_FLOWER_CMSG_TYPE_PORT_MOD, GFP_KERNEL);
83 if (!skb)
84 return -ENOMEM;
85
86 msg = nfp_flower_cmsg_get_data(skb);
87 msg->portnum = cpu_to_be32(repr->dst->u.port_info.port_id);
88 msg->reserved = 0;
89 msg->info = carrier_ok;
90
91 if (mtu_only)
92 msg->info |= NFP_FLOWER_CMSG_PORTMOD_MTU_CHANGE_ONLY;
93
94 msg->mtu = cpu_to_be16(mtu);
95
96 nfp_ctrl_tx(repr->app->ctrl, skb);
97
98 return 0;
99}
100
101int nfp_flower_cmsg_portreify(struct nfp_repr *repr, bool exists)
102{
103 struct nfp_flower_cmsg_portreify *msg;
104 struct sk_buff *skb;
105
106 skb = nfp_flower_cmsg_alloc(repr->app, sizeof(*msg),
107 NFP_FLOWER_CMSG_TYPE_PORT_REIFY,
108 GFP_KERNEL);
109 if (!skb)
110 return -ENOMEM;
111
112 msg = nfp_flower_cmsg_get_data(skb);
113 msg->portnum = cpu_to_be32(repr->dst->u.port_info.port_id);
114 msg->reserved = 0;
115 msg->info = cpu_to_be16(exists);
116
117 nfp_ctrl_tx(repr->app->ctrl, skb);
118
119 return 0;
120}
121
122static bool
123nfp_flower_process_mtu_ack(struct nfp_app *app, struct sk_buff *skb)
124{
125 struct nfp_flower_priv *app_priv = app->priv;
126 struct nfp_flower_cmsg_portmod *msg;
127
128 msg = nfp_flower_cmsg_get_data(skb);
129
130 if (!(msg->info & NFP_FLOWER_CMSG_PORTMOD_MTU_CHANGE_ONLY))
131 return false;
132
133 spin_lock_bh(&app_priv->mtu_conf.lock);
134 if (!app_priv->mtu_conf.requested_val ||
135 app_priv->mtu_conf.portnum != be32_to_cpu(msg->portnum) ||
136 be16_to_cpu(msg->mtu) != app_priv->mtu_conf.requested_val) {
137
138 spin_unlock_bh(&app_priv->mtu_conf.lock);
139 return false;
140 }
141
142 app_priv->mtu_conf.ack = true;
143 app_priv->mtu_conf.requested_val = 0;
144 wake_up(&app_priv->mtu_conf.wait_q);
145 spin_unlock_bh(&app_priv->mtu_conf.lock);
146
147 return true;
148}
149
150static void
151nfp_flower_cmsg_portmod_rx(struct nfp_app *app, struct sk_buff *skb)
152{
153 struct nfp_flower_cmsg_portmod *msg;
154 struct net_device *netdev;
155 bool link;
156
157 msg = nfp_flower_cmsg_get_data(skb);
158 link = msg->info & NFP_FLOWER_CMSG_PORTMOD_INFO_LINK;
159
160 rtnl_lock();
161 rcu_read_lock();
162 netdev = nfp_app_dev_get(app, be32_to_cpu(msg->portnum), NULL);
163 rcu_read_unlock();
164 if (!netdev) {
165 nfp_flower_cmsg_warn(app, "ctrl msg for unknown port 0x%08x\n",
166 be32_to_cpu(msg->portnum));
167 rtnl_unlock();
168 return;
169 }
170
171 if (link) {
172 u16 mtu = be16_to_cpu(msg->mtu);
173
174 netif_carrier_on(netdev);
175
176
177 if (mtu)
178 dev_set_mtu(netdev, mtu);
179 } else {
180 netif_carrier_off(netdev);
181 }
182 rtnl_unlock();
183}
184
185static void
186nfp_flower_cmsg_portreify_rx(struct nfp_app *app, struct sk_buff *skb)
187{
188 struct nfp_flower_priv *priv = app->priv;
189 struct nfp_flower_cmsg_portreify *msg;
190 bool exists;
191
192 msg = nfp_flower_cmsg_get_data(skb);
193
194 rcu_read_lock();
195 exists = !!nfp_app_dev_get(app, be32_to_cpu(msg->portnum), NULL);
196 rcu_read_unlock();
197 if (!exists) {
198 nfp_flower_cmsg_warn(app, "ctrl msg for unknown port 0x%08x\n",
199 be32_to_cpu(msg->portnum));
200 return;
201 }
202
203 atomic_inc(&priv->reify_replies);
204 wake_up(&priv->reify_wait_queue);
205}
206
207static void
208nfp_flower_cmsg_merge_hint_rx(struct nfp_app *app, struct sk_buff *skb)
209{
210 unsigned int msg_len = nfp_flower_cmsg_get_data_len(skb);
211 struct nfp_flower_cmsg_merge_hint *msg;
212 struct nfp_fl_payload *sub_flows[2];
213 int err, i, flow_cnt;
214
215 msg = nfp_flower_cmsg_get_data(skb);
216
217 flow_cnt = msg->count + 1;
218
219 if (msg_len < struct_size(msg, flow, flow_cnt)) {
220 nfp_flower_cmsg_warn(app, "Merge hint ctrl msg too short - %d bytes but expect %zd\n",
221 msg_len, struct_size(msg, flow, flow_cnt));
222 return;
223 }
224
225 if (flow_cnt != 2) {
226 nfp_flower_cmsg_warn(app, "Merge hint contains %d flows - two are expected\n",
227 flow_cnt);
228 return;
229 }
230
231 rtnl_lock();
232 for (i = 0; i < flow_cnt; i++) {
233 u32 ctx = be32_to_cpu(msg->flow[i].host_ctx);
234
235 sub_flows[i] = nfp_flower_get_fl_payload_from_ctx(app, ctx);
236 if (!sub_flows[i]) {
237 nfp_flower_cmsg_warn(app, "Invalid flow in merge hint\n");
238 goto err_rtnl_unlock;
239 }
240 }
241
242 err = nfp_flower_merge_offloaded_flows(app, sub_flows[0], sub_flows[1]);
243
244 if (err == -ENOMEM)
245 nfp_flower_cmsg_warn(app, "Flow merge memory fail.\n");
246
247err_rtnl_unlock:
248 rtnl_unlock();
249}
250
251static void
252nfp_flower_cmsg_process_one_rx(struct nfp_app *app, struct sk_buff *skb)
253{
254 struct nfp_flower_priv *app_priv = app->priv;
255 struct nfp_flower_cmsg_hdr *cmsg_hdr;
256 enum nfp_flower_cmsg_type_port type;
257 bool skb_stored = false;
258
259 cmsg_hdr = nfp_flower_cmsg_get_hdr(skb);
260
261 type = cmsg_hdr->type;
262 switch (type) {
263 case NFP_FLOWER_CMSG_TYPE_PORT_MOD:
264 nfp_flower_cmsg_portmod_rx(app, skb);
265 break;
266 case NFP_FLOWER_CMSG_TYPE_MERGE_HINT:
267 if (app_priv->flower_ext_feats & NFP_FL_FEATS_FLOW_MERGE) {
268 nfp_flower_cmsg_merge_hint_rx(app, skb);
269 break;
270 }
271 goto err_default;
272 case NFP_FLOWER_CMSG_TYPE_NO_NEIGH:
273 nfp_tunnel_request_route_v4(app, skb);
274 break;
275 case NFP_FLOWER_CMSG_TYPE_NO_NEIGH_V6:
276 nfp_tunnel_request_route_v6(app, skb);
277 break;
278 case NFP_FLOWER_CMSG_TYPE_ACTIVE_TUNS:
279 nfp_tunnel_keep_alive(app, skb);
280 break;
281 case NFP_FLOWER_CMSG_TYPE_ACTIVE_TUNS_V6:
282 nfp_tunnel_keep_alive_v6(app, skb);
283 break;
284 case NFP_FLOWER_CMSG_TYPE_QOS_STATS:
285 nfp_flower_stats_rlim_reply(app, skb);
286 break;
287 case NFP_FLOWER_CMSG_TYPE_LAG_CONFIG:
288 if (app_priv->flower_ext_feats & NFP_FL_FEATS_LAG) {
289 skb_stored = nfp_flower_lag_unprocessed_msg(app, skb);
290 break;
291 }
292
293 default:
294err_default:
295 nfp_flower_cmsg_warn(app, "Cannot handle invalid repr control type %u\n",
296 type);
297 goto out;
298 }
299
300 if (!skb_stored)
301 dev_consume_skb_any(skb);
302 return;
303out:
304 dev_kfree_skb_any(skb);
305}
306
307void nfp_flower_cmsg_process_rx(struct work_struct *work)
308{
309 struct sk_buff_head cmsg_joined;
310 struct nfp_flower_priv *priv;
311 struct sk_buff *skb;
312
313 priv = container_of(work, struct nfp_flower_priv, cmsg_work);
314 skb_queue_head_init(&cmsg_joined);
315
316 spin_lock_bh(&priv->cmsg_skbs_high.lock);
317 skb_queue_splice_tail_init(&priv->cmsg_skbs_high, &cmsg_joined);
318 spin_unlock_bh(&priv->cmsg_skbs_high.lock);
319
320 spin_lock_bh(&priv->cmsg_skbs_low.lock);
321 skb_queue_splice_tail_init(&priv->cmsg_skbs_low, &cmsg_joined);
322 spin_unlock_bh(&priv->cmsg_skbs_low.lock);
323
324 while ((skb = __skb_dequeue(&cmsg_joined)))
325 nfp_flower_cmsg_process_one_rx(priv->app, skb);
326}
327
328static void
329nfp_flower_queue_ctl_msg(struct nfp_app *app, struct sk_buff *skb, int type)
330{
331 struct nfp_flower_priv *priv = app->priv;
332 struct sk_buff_head *skb_head;
333
334 if (type == NFP_FLOWER_CMSG_TYPE_PORT_MOD)
335 skb_head = &priv->cmsg_skbs_high;
336 else
337 skb_head = &priv->cmsg_skbs_low;
338
339 if (skb_queue_len(skb_head) >= NFP_FLOWER_WORKQ_MAX_SKBS) {
340 nfp_flower_cmsg_warn(app, "Dropping queued control messages\n");
341 dev_kfree_skb_any(skb);
342 return;
343 }
344
345 skb_queue_tail(skb_head, skb);
346 schedule_work(&priv->cmsg_work);
347}
348
349void nfp_flower_cmsg_rx(struct nfp_app *app, struct sk_buff *skb)
350{
351 struct nfp_flower_cmsg_hdr *cmsg_hdr;
352
353 cmsg_hdr = nfp_flower_cmsg_get_hdr(skb);
354
355 if (unlikely(cmsg_hdr->version != NFP_FLOWER_CMSG_VER1)) {
356 nfp_flower_cmsg_warn(app, "Cannot handle repr control version %u\n",
357 cmsg_hdr->version);
358 dev_kfree_skb_any(skb);
359 return;
360 }
361
362 if (cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_FLOW_STATS) {
363
364 nfp_flower_rx_flow_stats(app, skb);
365 dev_consume_skb_any(skb);
366 } else if (cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_PORT_MOD &&
367 nfp_flower_process_mtu_ack(app, skb)) {
368
369 dev_consume_skb_any(skb);
370 } else if (cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_TUN_NEIGH ||
371 cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_TUN_NEIGH_V6) {
372
373 dev_consume_skb_any(skb);
374 } else if (cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_PORT_REIFY) {
375
376 nfp_flower_cmsg_portreify_rx(app, skb);
377 dev_consume_skb_any(skb);
378 } else {
379 nfp_flower_queue_ctl_msg(app, skb, cmsg_hdr->type);
380 }
381}
382
