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3c2d774c | 1 | /* |
cd6853d3 | 2 | * Copyright (c) 2006 - 2009 Intel-NE, Inc. All rights reserved. |
3c2d774c GS |
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 | */ | |
33 | ||
34 | ||
35 | #define TCPOPT_TIMESTAMP 8 | |
36 | ||
37 | #include <asm/atomic.h> | |
38 | #include <linux/skbuff.h> | |
39 | #include <linux/ip.h> | |
40 | #include <linux/tcp.h> | |
41 | #include <linux/init.h> | |
42 | #include <linux/if_arp.h> | |
f2b2b59b | 43 | #include <linux/if_vlan.h> |
3c2d774c GS |
44 | #include <linux/notifier.h> |
45 | #include <linux/net.h> | |
46 | #include <linux/types.h> | |
47 | #include <linux/timer.h> | |
48 | #include <linux/time.h> | |
49 | #include <linux/delay.h> | |
50 | #include <linux/etherdevice.h> | |
51 | #include <linux/netdevice.h> | |
52 | #include <linux/random.h> | |
53 | #include <linux/list.h> | |
54 | #include <linux/threads.h> | |
7191a0a1 | 55 | #include <net/arp.h> |
3c2d774c GS |
56 | #include <net/neighbour.h> |
57 | #include <net/route.h> | |
58 | #include <net/ip_fib.h> | |
59 | ||
60 | #include "nes.h" | |
61 | ||
62 | u32 cm_packets_sent; | |
63 | u32 cm_packets_bounced; | |
64 | u32 cm_packets_dropped; | |
65 | u32 cm_packets_retrans; | |
66 | u32 cm_packets_created; | |
67 | u32 cm_packets_received; | |
68 | u32 cm_listens_created; | |
69 | u32 cm_listens_destroyed; | |
70 | u32 cm_backlog_drops; | |
71 | atomic_t cm_loopbacks; | |
72 | atomic_t cm_nodes_created; | |
73 | atomic_t cm_nodes_destroyed; | |
74 | atomic_t cm_accel_dropped_pkts; | |
75 | atomic_t cm_resets_recvd; | |
76 | ||
6492cdf3 FL |
77 | static inline int mini_cm_accelerated(struct nes_cm_core *, |
78 | struct nes_cm_node *); | |
3c2d774c | 79 | static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, |
6492cdf3 | 80 | struct nes_vnic *, struct nes_cm_info *); |
3c2d774c | 81 | static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *); |
1a855fbf | 82 | static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, |
6492cdf3 FL |
83 | struct nes_vnic *, u16, void *, struct nes_cm_info *); |
84 | static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *); | |
1a855fbf | 85 | static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *, |
6492cdf3 | 86 | struct nes_cm_node *); |
1a855fbf | 87 | static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *, |
6492cdf3 | 88 | struct nes_cm_node *); |
4a14f6a7 | 89 | static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, |
6492cdf3 | 90 | struct sk_buff *); |
1a855fbf RD |
91 | static int mini_cm_dealloc_core(struct nes_cm_core *); |
92 | static int mini_cm_get(struct nes_cm_core *); | |
93 | static int mini_cm_set(struct nes_cm_core *, u32, u32); | |
6492cdf3 | 94 | |
6098d107 | 95 | static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, |
6492cdf3 | 96 | void *, u32, void *, u32, u8); |
6492cdf3 FL |
97 | static int add_ref_cm_node(struct nes_cm_node *); |
98 | static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *); | |
99 | ||
1a855fbf RD |
100 | static int nes_cm_disconn_true(struct nes_qp *); |
101 | static int nes_cm_post_event(struct nes_cm_event *event); | |
102 | static int nes_disconnect(struct nes_qp *nesqp, int abrupt); | |
103 | static void nes_disconnect_worker(struct work_struct *work); | |
6492cdf3 FL |
104 | |
105 | static int send_mpa_request(struct nes_cm_node *, struct sk_buff *); | |
9d5ab133 | 106 | static int send_mpa_reject(struct nes_cm_node *); |
6492cdf3 FL |
107 | static int send_syn(struct nes_cm_node *, u32, struct sk_buff *); |
108 | static int send_reset(struct nes_cm_node *, struct sk_buff *); | |
109 | static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb); | |
1a855fbf | 110 | static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb); |
6492cdf3 FL |
111 | static void process_packet(struct nes_cm_node *, struct sk_buff *, |
112 | struct nes_cm_core *); | |
113 | ||
114 | static void active_open_err(struct nes_cm_node *, struct sk_buff *, int); | |
115 | static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int); | |
116 | static void cleanup_retrans_entry(struct nes_cm_node *); | |
9d5ab133 | 117 | static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *); |
6492cdf3 FL |
118 | static void free_retrans_entry(struct nes_cm_node *cm_node); |
119 | static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, | |
120 | struct sk_buff *skb, int optionsize, int passive); | |
121 | ||
122 | /* CM event handler functions */ | |
123 | static void cm_event_connected(struct nes_cm_event *); | |
124 | static void cm_event_connect_error(struct nes_cm_event *); | |
125 | static void cm_event_reset(struct nes_cm_event *); | |
126 | static void cm_event_mpa_req(struct nes_cm_event *); | |
9d5ab133 FL |
127 | static void cm_event_mpa_reject(struct nes_cm_event *); |
128 | static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node); | |
6492cdf3 FL |
129 | |
130 | static void print_core(struct nes_cm_core *core); | |
3c2d774c GS |
131 | |
132 | /* External CM API Interface */ | |
133 | /* instance of function pointers for client API */ | |
134 | /* set address of this instance to cm_core->cm_ops at cm_core alloc */ | |
135 | static struct nes_cm_ops nes_cm_api = { | |
136 | mini_cm_accelerated, | |
137 | mini_cm_listen, | |
138 | mini_cm_del_listen, | |
139 | mini_cm_connect, | |
140 | mini_cm_close, | |
141 | mini_cm_accept, | |
142 | mini_cm_reject, | |
143 | mini_cm_recv_pkt, | |
144 | mini_cm_dealloc_core, | |
145 | mini_cm_get, | |
146 | mini_cm_set | |
147 | }; | |
148 | ||
1a855fbf | 149 | static struct nes_cm_core *g_cm_core; |
3c2d774c GS |
150 | |
151 | atomic_t cm_connects; | |
152 | atomic_t cm_accepts; | |
153 | atomic_t cm_disconnects; | |
154 | atomic_t cm_closes; | |
155 | atomic_t cm_connecteds; | |
156 | atomic_t cm_connect_reqs; | |
157 | atomic_t cm_rejects; | |
158 | ||
159 | ||
160 | /** | |
161 | * create_event | |
162 | */ | |
163 | static struct nes_cm_event *create_event(struct nes_cm_node *cm_node, | |
164 | enum nes_cm_event_type type) | |
165 | { | |
166 | struct nes_cm_event *event; | |
167 | ||
168 | if (!cm_node->cm_id) | |
169 | return NULL; | |
170 | ||
171 | /* allocate an empty event */ | |
172 | event = kzalloc(sizeof(*event), GFP_ATOMIC); | |
173 | ||
174 | if (!event) | |
175 | return NULL; | |
176 | ||
177 | event->type = type; | |
178 | event->cm_node = cm_node; | |
179 | event->cm_info.rem_addr = cm_node->rem_addr; | |
180 | event->cm_info.loc_addr = cm_node->loc_addr; | |
181 | event->cm_info.rem_port = cm_node->rem_port; | |
182 | event->cm_info.loc_port = cm_node->loc_port; | |
183 | event->cm_info.cm_id = cm_node->cm_id; | |
184 | ||
6492cdf3 FL |
185 | nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, " |
186 | "dst_addr=%08x[%x], src_addr=%08x[%x]\n", | |
187 | cm_node, event, type, event->cm_info.loc_addr, | |
188 | event->cm_info.loc_port, event->cm_info.rem_addr, | |
189 | event->cm_info.rem_port); | |
3c2d774c GS |
190 | |
191 | nes_cm_post_event(event); | |
192 | return event; | |
193 | } | |
194 | ||
195 | ||
196 | /** | |
197 | * send_mpa_request | |
198 | */ | |
6492cdf3 | 199 | static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb) |
3c2d774c | 200 | { |
3c2d774c | 201 | if (!skb) { |
6492cdf3 | 202 | nes_debug(NES_DBG_CM, "skb set to NULL\n"); |
3c2d774c GS |
203 | return -1; |
204 | } | |
205 | ||
206 | /* send an MPA Request frame */ | |
207 | form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame, | |
208 | cm_node->mpa_frame_size, SET_ACK); | |
209 | ||
9d5ab133 FL |
210 | return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); |
211 | } | |
3c2d774c | 212 | |
9d5ab133 FL |
213 | |
214 | ||
215 | static int send_mpa_reject(struct nes_cm_node *cm_node) | |
216 | { | |
217 | struct sk_buff *skb = NULL; | |
218 | ||
219 | skb = dev_alloc_skb(MAX_CM_BUFFER); | |
220 | if (!skb) { | |
221 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
222 | return -ENOMEM; | |
223 | } | |
224 | ||
225 | /* send an MPA reject frame */ | |
226 | form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame, | |
227 | cm_node->mpa_frame_size, SET_ACK | SET_FIN); | |
228 | ||
229 | cm_node->state = NES_CM_STATE_FIN_WAIT1; | |
230 | return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
3c2d774c GS |
231 | } |
232 | ||
233 | ||
234 | /** | |
235 | * recv_mpa - process a received TCP pkt, we are expecting an | |
236 | * IETF MPA frame | |
237 | */ | |
9d5ab133 FL |
238 | static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type, |
239 | u32 len) | |
3c2d774c GS |
240 | { |
241 | struct ietf_mpa_frame *mpa_frame; | |
242 | ||
9d5ab133 FL |
243 | *type = NES_MPA_REQUEST_ACCEPT; |
244 | ||
3c2d774c GS |
245 | /* assume req frame is in tcp data payload */ |
246 | if (len < sizeof(struct ietf_mpa_frame)) { | |
247 | nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len); | |
9d5ab133 | 248 | return -EINVAL; |
3c2d774c GS |
249 | } |
250 | ||
251 | mpa_frame = (struct ietf_mpa_frame *)buffer; | |
252 | cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len); | |
253 | ||
254 | if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) { | |
255 | nes_debug(NES_DBG_CM, "The received ietf buffer was not right" | |
256 | " complete (%x + %x != %x)\n", | |
9d5ab133 FL |
257 | cm_node->mpa_frame_size, |
258 | (u32)sizeof(struct ietf_mpa_frame), len); | |
259 | return -EINVAL; | |
260 | } | |
261 | /* make sure it does not exceed the max size */ | |
262 | if (len > MAX_CM_BUFFER) { | |
263 | nes_debug(NES_DBG_CM, "The received ietf buffer was too large" | |
264 | " (%x + %x != %x)\n", | |
265 | cm_node->mpa_frame_size, | |
266 | (u32)sizeof(struct ietf_mpa_frame), len); | |
267 | return -EINVAL; | |
3c2d774c GS |
268 | } |
269 | ||
270 | /* copy entire MPA frame to our cm_node's frame */ | |
271 | memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame), | |
272 | cm_node->mpa_frame_size); | |
273 | ||
9d5ab133 FL |
274 | if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) |
275 | *type = NES_MPA_REQUEST_REJECT; | |
3c2d774c GS |
276 | return 0; |
277 | } | |
278 | ||
279 | ||
3c2d774c GS |
280 | /** |
281 | * form_cm_frame - get a free packet and build empty frame Use | |
282 | * node info to build. | |
283 | */ | |
6098d107 | 284 | static void form_cm_frame(struct sk_buff *skb, |
6492cdf3 FL |
285 | struct nes_cm_node *cm_node, void *options, u32 optionsize, |
286 | void *data, u32 datasize, u8 flags) | |
3c2d774c GS |
287 | { |
288 | struct tcphdr *tcph; | |
289 | struct iphdr *iph; | |
290 | struct ethhdr *ethh; | |
291 | u8 *buf; | |
292 | u16 packetsize = sizeof(*iph); | |
293 | ||
294 | packetsize += sizeof(*tcph); | |
295 | packetsize += optionsize + datasize; | |
296 | ||
297 | memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph)); | |
298 | ||
299 | skb->len = 0; | |
300 | buf = skb_put(skb, packetsize + ETH_HLEN); | |
301 | ||
302 | ethh = (struct ethhdr *) buf; | |
303 | buf += ETH_HLEN; | |
304 | ||
305 | iph = (struct iphdr *)buf; | |
306 | buf += sizeof(*iph); | |
307 | tcph = (struct tcphdr *)buf; | |
308 | skb_reset_mac_header(skb); | |
309 | skb_set_network_header(skb, ETH_HLEN); | |
310 | skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph)); | |
311 | buf += sizeof(*tcph); | |
312 | ||
313 | skb->ip_summed = CHECKSUM_PARTIAL; | |
314 | skb->protocol = htons(0x800); | |
315 | skb->data_len = 0; | |
316 | skb->mac_len = ETH_HLEN; | |
317 | ||
318 | memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN); | |
319 | memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN); | |
320 | ethh->h_proto = htons(0x0800); | |
321 | ||
322 | iph->version = IPVERSION; | |
323 | iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ | |
324 | iph->tos = 0; | |
325 | iph->tot_len = htons(packetsize); | |
326 | iph->id = htons(++cm_node->tcp_cntxt.loc_id); | |
327 | ||
328 | iph->frag_off = htons(0x4000); | |
329 | iph->ttl = 0x40; | |
330 | iph->protocol = 0x06; /* IPPROTO_TCP */ | |
331 | ||
332 | iph->saddr = htonl(cm_node->loc_addr); | |
333 | iph->daddr = htonl(cm_node->rem_addr); | |
334 | ||
335 | tcph->source = htons(cm_node->loc_port); | |
336 | tcph->dest = htons(cm_node->rem_port); | |
337 | tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); | |
338 | ||
339 | if (flags & SET_ACK) { | |
340 | cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; | |
341 | tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); | |
342 | tcph->ack = 1; | |
343 | } else | |
344 | tcph->ack_seq = 0; | |
345 | ||
346 | if (flags & SET_SYN) { | |
347 | cm_node->tcp_cntxt.loc_seq_num++; | |
348 | tcph->syn = 1; | |
349 | } else | |
6492cdf3 | 350 | cm_node->tcp_cntxt.loc_seq_num += datasize; |
3c2d774c | 351 | |
6492cdf3 FL |
352 | if (flags & SET_FIN) { |
353 | cm_node->tcp_cntxt.loc_seq_num++; | |
3c2d774c | 354 | tcph->fin = 1; |
6492cdf3 | 355 | } |
3c2d774c GS |
356 | |
357 | if (flags & SET_RST) | |
358 | tcph->rst = 1; | |
359 | ||
360 | tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2); | |
361 | tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); | |
362 | tcph->urg_ptr = 0; | |
363 | if (optionsize) | |
364 | memcpy(buf, options, optionsize); | |
365 | buf += optionsize; | |
366 | if (datasize) | |
367 | memcpy(buf, data, datasize); | |
368 | ||
369 | skb_shinfo(skb)->nr_frags = 0; | |
370 | cm_packets_created++; | |
371 | ||
3c2d774c GS |
372 | } |
373 | ||
374 | ||
375 | /** | |
376 | * print_core - dump a cm core | |
377 | */ | |
378 | static void print_core(struct nes_cm_core *core) | |
379 | { | |
380 | nes_debug(NES_DBG_CM, "---------------------------------------------\n"); | |
381 | nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core); | |
382 | if (!core) | |
383 | return; | |
384 | nes_debug(NES_DBG_CM, "---------------------------------------------\n"); | |
3c2d774c GS |
385 | |
386 | nes_debug(NES_DBG_CM, "State : %u \n", core->state); | |
387 | ||
3c2d774c GS |
388 | nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt)); |
389 | nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt)); | |
390 | ||
391 | nes_debug(NES_DBG_CM, "core : %p \n", core); | |
392 | ||
393 | nes_debug(NES_DBG_CM, "-------------- end core ---------------\n"); | |
394 | } | |
395 | ||
396 | ||
397 | /** | |
398 | * schedule_nes_timer | |
399 | * note - cm_node needs to be protected before calling this. Encase in: | |
400 | * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node); | |
401 | */ | |
402 | int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
403 | enum nes_timer_type type, int send_retrans, | |
404 | int close_when_complete) | |
405 | { | |
406 | unsigned long flags; | |
6492cdf3 | 407 | struct nes_cm_core *cm_core = cm_node->cm_core; |
3c2d774c GS |
408 | struct nes_timer_entry *new_send; |
409 | int ret = 0; | |
410 | u32 was_timer_set; | |
411 | ||
412 | new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); | |
413 | if (!new_send) | |
9d5ab133 | 414 | return -ENOMEM; |
3c2d774c GS |
415 | |
416 | /* new_send->timetosend = currenttime */ | |
417 | new_send->retrycount = NES_DEFAULT_RETRYS; | |
418 | new_send->retranscount = NES_DEFAULT_RETRANS; | |
419 | new_send->skb = skb; | |
420 | new_send->timetosend = jiffies; | |
421 | new_send->type = type; | |
422 | new_send->netdev = cm_node->netdev; | |
423 | new_send->send_retrans = send_retrans; | |
424 | new_send->close_when_complete = close_when_complete; | |
425 | ||
426 | if (type == NES_TIMER_TYPE_CLOSE) { | |
6492cdf3 | 427 | new_send->timetosend += (HZ/10); |
9d5ab133 FL |
428 | if (cm_node->recv_entry) { |
429 | WARN_ON(1); | |
430 | return -EINVAL; | |
431 | } | |
432 | cm_node->recv_entry = new_send; | |
3c2d774c GS |
433 | } |
434 | ||
435 | if (type == NES_TIMER_TYPE_SEND) { | |
b30db1c1 | 436 | new_send->seq_num = ntohl(tcp_hdr(skb)->seq); |
3c2d774c | 437 | atomic_inc(&new_send->skb->users); |
6492cdf3 FL |
438 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
439 | cm_node->send_entry = new_send; | |
440 | add_ref_cm_node(cm_node); | |
441 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
442 | new_send->timetosend = jiffies + NES_RETRY_TIMEOUT; | |
3c2d774c GS |
443 | |
444 | ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev); | |
445 | if (ret != NETDEV_TX_OK) { | |
6492cdf3 FL |
446 | nes_debug(NES_DBG_CM, "Error sending packet %p " |
447 | "(jiffies = %lu)\n", new_send, jiffies); | |
3c2d774c GS |
448 | atomic_dec(&new_send->skb->users); |
449 | new_send->timetosend = jiffies; | |
450 | } else { | |
451 | cm_packets_sent++; | |
452 | if (!send_retrans) { | |
6492cdf3 | 453 | cleanup_retrans_entry(cm_node); |
3c2d774c | 454 | if (close_when_complete) |
6492cdf3 | 455 | rem_ref_cm_node(cm_core, cm_node); |
3c2d774c GS |
456 | return ret; |
457 | } | |
3c2d774c | 458 | } |
3c2d774c | 459 | } |
3c2d774c GS |
460 | |
461 | was_timer_set = timer_pending(&cm_core->tcp_timer); | |
462 | ||
463 | if (!was_timer_set) { | |
464 | cm_core->tcp_timer.expires = new_send->timetosend; | |
465 | add_timer(&cm_core->tcp_timer); | |
466 | } | |
467 | ||
468 | return ret; | |
469 | } | |
470 | ||
9d5ab133 FL |
471 | static void nes_retrans_expired(struct nes_cm_node *cm_node) |
472 | { | |
473 | switch (cm_node->state) { | |
474 | case NES_CM_STATE_SYN_RCVD: | |
475 | case NES_CM_STATE_CLOSING: | |
476 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
477 | break; | |
478 | case NES_CM_STATE_LAST_ACK: | |
479 | case NES_CM_STATE_FIN_WAIT1: | |
480 | case NES_CM_STATE_MPAREJ_RCVD: | |
481 | send_reset(cm_node, NULL); | |
482 | break; | |
483 | default: | |
484 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
485 | } | |
486 | } | |
487 | ||
488 | static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node) | |
489 | { | |
490 | struct nes_timer_entry *recv_entry = cm_node->recv_entry; | |
491 | struct iw_cm_id *cm_id = cm_node->cm_id; | |
492 | struct nes_qp *nesqp; | |
493 | unsigned long qplockflags; | |
494 | ||
495 | if (!recv_entry) | |
496 | return; | |
497 | nesqp = (struct nes_qp *)recv_entry->skb; | |
498 | if (nesqp) { | |
499 | spin_lock_irqsave(&nesqp->lock, qplockflags); | |
500 | if (nesqp->cm_id) { | |
501 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, " | |
502 | "refcount = %d: HIT A " | |
503 | "NES_TIMER_TYPE_CLOSE with something " | |
504 | "to do!!!\n", nesqp->hwqp.qp_id, cm_id, | |
505 | atomic_read(&nesqp->refcount)); | |
506 | nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED; | |
507 | nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT; | |
508 | nesqp->ibqp_state = IB_QPS_ERR; | |
509 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
510 | nes_cm_disconn(nesqp); | |
511 | } else { | |
512 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
513 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, " | |
514 | "refcount = %d: HIT A " | |
515 | "NES_TIMER_TYPE_CLOSE with nothing " | |
516 | "to do!!!\n", nesqp->hwqp.qp_id, cm_id, | |
517 | atomic_read(&nesqp->refcount)); | |
518 | } | |
519 | } else if (rem_node) { | |
520 | /* TIME_WAIT state */ | |
521 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
522 | } | |
523 | if (cm_node->cm_id) | |
524 | cm_id->rem_ref(cm_id); | |
525 | kfree(recv_entry); | |
526 | cm_node->recv_entry = NULL; | |
527 | } | |
3c2d774c GS |
528 | |
529 | /** | |
530 | * nes_cm_timer_tick | |
531 | */ | |
1a855fbf | 532 | static void nes_cm_timer_tick(unsigned long pass) |
3c2d774c | 533 | { |
9d5ab133 | 534 | unsigned long flags; |
3c2d774c | 535 | unsigned long nexttimeout = jiffies + NES_LONG_TIME; |
3c2d774c GS |
536 | struct nes_cm_node *cm_node; |
537 | struct nes_timer_entry *send_entry, *recv_entry; | |
9d5ab133 FL |
538 | struct list_head *list_core_temp; |
539 | struct list_head *list_node; | |
3c2d774c | 540 | struct nes_cm_core *cm_core = g_cm_core; |
3c2d774c GS |
541 | u32 settimer = 0; |
542 | int ret = NETDEV_TX_OK; | |
3c2d774c | 543 | |
879e5bd5 FL |
544 | struct list_head timer_list; |
545 | INIT_LIST_HEAD(&timer_list); | |
3c2d774c GS |
546 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
547 | ||
6492cdf3 | 548 | list_for_each_safe(list_node, list_core_temp, |
879e5bd5 | 549 | &cm_core->connected_nodes) { |
3c2d774c | 550 | cm_node = container_of(list_node, struct nes_cm_node, list); |
9d5ab133 | 551 | if ((cm_node->recv_entry) || (cm_node->send_entry)) { |
879e5bd5 FL |
552 | add_ref_cm_node(cm_node); |
553 | list_add(&cm_node->timer_entry, &timer_list); | |
554 | } | |
555 | } | |
556 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
557 | ||
558 | list_for_each_safe(list_node, list_core_temp, &timer_list) { | |
559 | cm_node = container_of(list_node, struct nes_cm_node, | |
560 | timer_entry); | |
9d5ab133 FL |
561 | recv_entry = cm_node->recv_entry; |
562 | ||
563 | if (recv_entry) { | |
6492cdf3 FL |
564 | if (time_after(recv_entry->timetosend, jiffies)) { |
565 | if (nexttimeout > recv_entry->timetosend || | |
9d5ab133 | 566 | !settimer) { |
3c2d774c GS |
567 | nexttimeout = recv_entry->timetosend; |
568 | settimer = 1; | |
569 | } | |
9d5ab133 FL |
570 | } else |
571 | handle_recv_entry(cm_node, 1); | |
3c2d774c | 572 | } |
3c2d774c GS |
573 | |
574 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
6492cdf3 FL |
575 | do { |
576 | send_entry = cm_node->send_entry; | |
577 | if (!send_entry) | |
c5d321e5 | 578 | break; |
3c2d774c GS |
579 | if (time_after(send_entry->timetosend, jiffies)) { |
580 | if (cm_node->state != NES_CM_STATE_TSA) { | |
6492cdf3 FL |
581 | if ((nexttimeout > |
582 | send_entry->timetosend) || | |
583 | !settimer) { | |
584 | nexttimeout = | |
585 | send_entry->timetosend; | |
3c2d774c GS |
586 | settimer = 1; |
587 | } | |
3c2d774c | 588 | } else { |
6492cdf3 | 589 | free_retrans_entry(cm_node); |
3c2d774c | 590 | } |
9d5ab133 | 591 | break; |
3c2d774c | 592 | } |
6492cdf3 FL |
593 | |
594 | if ((cm_node->state == NES_CM_STATE_TSA) || | |
595 | (cm_node->state == NES_CM_STATE_CLOSED)) { | |
596 | free_retrans_entry(cm_node); | |
c5d321e5 | 597 | break; |
3c2d774c GS |
598 | } |
599 | ||
6492cdf3 FL |
600 | if (!send_entry->retranscount || |
601 | !send_entry->retrycount) { | |
3c2d774c | 602 | cm_packets_dropped++; |
6492cdf3 | 603 | free_retrans_entry(cm_node); |
9d5ab133 | 604 | |
6492cdf3 FL |
605 | spin_unlock_irqrestore( |
606 | &cm_node->retrans_list_lock, flags); | |
9d5ab133 FL |
607 | nes_retrans_expired(cm_node); |
608 | cm_node->state = NES_CM_STATE_CLOSED; | |
6492cdf3 FL |
609 | spin_lock_irqsave(&cm_node->retrans_list_lock, |
610 | flags); | |
c5d321e5 | 611 | break; |
3c2d774c | 612 | } |
3c2d774c GS |
613 | atomic_inc(&send_entry->skb->users); |
614 | cm_packets_retrans++; | |
6492cdf3 FL |
615 | nes_debug(NES_DBG_CM, "Retransmitting send_entry %p " |
616 | "for node %p, jiffies = %lu, time to send = " | |
617 | "%lu, retranscount = %u, send_entry->seq_num = " | |
618 | "0x%08X, cm_node->tcp_cntxt.rem_ack_num = " | |
619 | "0x%08X\n", send_entry, cm_node, jiffies, | |
620 | send_entry->timetosend, | |
621 | send_entry->retranscount, | |
622 | send_entry->seq_num, | |
623 | cm_node->tcp_cntxt.rem_ack_num); | |
624 | ||
625 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, | |
626 | flags); | |
3c2d774c | 627 | ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev); |
6492cdf3 | 628 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
3c2d774c | 629 | if (ret != NETDEV_TX_OK) { |
6492cdf3 FL |
630 | nes_debug(NES_DBG_CM, "rexmit failed for " |
631 | "node=%p\n", cm_node); | |
3c2d774c GS |
632 | cm_packets_bounced++; |
633 | atomic_dec(&send_entry->skb->users); | |
634 | send_entry->retrycount--; | |
635 | nexttimeout = jiffies + NES_SHORT_TIME; | |
636 | settimer = 1; | |
c5d321e5 | 637 | break; |
3c2d774c GS |
638 | } else { |
639 | cm_packets_sent++; | |
640 | } | |
6492cdf3 FL |
641 | nes_debug(NES_DBG_CM, "Packet Sent: retrans count = " |
642 | "%u, retry count = %u.\n", | |
643 | send_entry->retranscount, | |
644 | send_entry->retrycount); | |
3c2d774c GS |
645 | if (send_entry->send_retrans) { |
646 | send_entry->retranscount--; | |
6492cdf3 FL |
647 | send_entry->timetosend = jiffies + |
648 | NES_RETRY_TIMEOUT; | |
649 | if (nexttimeout > send_entry->timetosend || | |
650 | !settimer) { | |
3c2d774c GS |
651 | nexttimeout = send_entry->timetosend; |
652 | settimer = 1; | |
653 | } | |
3c2d774c GS |
654 | } else { |
655 | int close_when_complete; | |
6492cdf3 FL |
656 | close_when_complete = |
657 | send_entry->close_when_complete; | |
658 | nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n", | |
659 | cm_node, cm_node->state); | |
660 | free_retrans_entry(cm_node); | |
661 | if (close_when_complete) | |
662 | rem_ref_cm_node(cm_node->cm_core, | |
663 | cm_node); | |
3c2d774c | 664 | } |
6492cdf3 | 665 | } while (0); |
3c2d774c | 666 | |
6492cdf3 FL |
667 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
668 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
6492cdf3 FL |
669 | if (ret != NETDEV_TX_OK) { |
670 | nes_debug(NES_DBG_CM, "rexmit failed for cm_node=%p\n", | |
671 | cm_node); | |
3c2d774c | 672 | break; |
6492cdf3 | 673 | } |
3c2d774c | 674 | } |
3c2d774c GS |
675 | |
676 | if (settimer) { | |
677 | if (!timer_pending(&cm_core->tcp_timer)) { | |
678 | cm_core->tcp_timer.expires = nexttimeout; | |
679 | add_timer(&cm_core->tcp_timer); | |
680 | } | |
681 | } | |
682 | } | |
683 | ||
684 | ||
685 | /** | |
686 | * send_syn | |
687 | */ | |
6492cdf3 FL |
688 | static int send_syn(struct nes_cm_node *cm_node, u32 sendack, |
689 | struct sk_buff *skb) | |
3c2d774c GS |
690 | { |
691 | int ret; | |
692 | int flags = SET_SYN; | |
3c2d774c | 693 | char optionsbuffer[sizeof(struct option_mss) + |
6492cdf3 FL |
694 | sizeof(struct option_windowscale) + sizeof(struct option_base) + |
695 | TCP_OPTIONS_PADDING]; | |
3c2d774c GS |
696 | |
697 | int optionssize = 0; | |
698 | /* Sending MSS option */ | |
699 | union all_known_options *options; | |
700 | ||
701 | if (!cm_node) | |
702 | return -EINVAL; | |
703 | ||
704 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
705 | options->as_mss.optionnum = OPTION_NUMBER_MSS; | |
706 | options->as_mss.length = sizeof(struct option_mss); | |
707 | options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); | |
708 | optionssize += sizeof(struct option_mss); | |
709 | ||
710 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
711 | options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; | |
712 | options->as_windowscale.length = sizeof(struct option_windowscale); | |
713 | options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; | |
714 | optionssize += sizeof(struct option_windowscale); | |
715 | ||
6492cdf3 | 716 | if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) { |
3c2d774c GS |
717 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
718 | options->as_base.optionnum = OPTION_NUMBER_WRITE0; | |
719 | options->as_base.length = sizeof(struct option_base); | |
720 | optionssize += sizeof(struct option_base); | |
721 | /* we need the size to be a multiple of 4 */ | |
722 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
723 | options->as_end = 1; | |
724 | optionssize += 1; | |
725 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
726 | options->as_end = 1; | |
727 | optionssize += 1; | |
728 | } | |
729 | ||
730 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
731 | options->as_end = OPTION_NUMBER_END; | |
732 | optionssize += 1; | |
733 | ||
6492cdf3 | 734 | if (!skb) |
e189062a | 735 | skb = dev_alloc_skb(MAX_CM_BUFFER); |
3c2d774c GS |
736 | if (!skb) { |
737 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
738 | return -1; | |
739 | } | |
740 | ||
741 | if (sendack) | |
742 | flags |= SET_ACK; | |
743 | ||
744 | form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags); | |
745 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
746 | ||
747 | return ret; | |
748 | } | |
749 | ||
750 | ||
751 | /** | |
752 | * send_reset | |
753 | */ | |
6492cdf3 | 754 | static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb) |
3c2d774c GS |
755 | { |
756 | int ret; | |
3c2d774c GS |
757 | int flags = SET_RST | SET_ACK; |
758 | ||
6492cdf3 | 759 | if (!skb) |
e189062a | 760 | skb = dev_alloc_skb(MAX_CM_BUFFER); |
3c2d774c GS |
761 | if (!skb) { |
762 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
9d5ab133 | 763 | return -ENOMEM; |
3c2d774c GS |
764 | } |
765 | ||
3c2d774c GS |
766 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags); |
767 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1); | |
768 | ||
769 | return ret; | |
770 | } | |
771 | ||
772 | ||
773 | /** | |
774 | * send_ack | |
775 | */ | |
6492cdf3 | 776 | static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb) |
3c2d774c GS |
777 | { |
778 | int ret; | |
6492cdf3 FL |
779 | |
780 | if (!skb) | |
e189062a | 781 | skb = dev_alloc_skb(MAX_CM_BUFFER); |
3c2d774c GS |
782 | |
783 | if (!skb) { | |
784 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
785 | return -1; | |
786 | } | |
787 | ||
788 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK); | |
789 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0); | |
790 | ||
791 | return ret; | |
792 | } | |
793 | ||
794 | ||
795 | /** | |
796 | * send_fin | |
797 | */ | |
1a855fbf | 798 | static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb) |
3c2d774c GS |
799 | { |
800 | int ret; | |
801 | ||
802 | /* if we didn't get a frame get one */ | |
803 | if (!skb) | |
e189062a | 804 | skb = dev_alloc_skb(MAX_CM_BUFFER); |
3c2d774c GS |
805 | |
806 | if (!skb) { | |
807 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
808 | return -1; | |
809 | } | |
810 | ||
811 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN); | |
812 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
813 | ||
814 | return ret; | |
815 | } | |
816 | ||
817 | ||
3c2d774c GS |
818 | /** |
819 | * find_node - find a cm node that matches the reference cm node | |
820 | */ | |
821 | static struct nes_cm_node *find_node(struct nes_cm_core *cm_core, | |
822 | u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr) | |
823 | { | |
824 | unsigned long flags; | |
3c2d774c GS |
825 | struct list_head *hte; |
826 | struct nes_cm_node *cm_node; | |
827 | ||
3c2d774c GS |
828 | /* get a handle on the hte */ |
829 | hte = &cm_core->connected_nodes; | |
830 | ||
3c2d774c GS |
831 | /* walk list and find cm_node associated with this session ID */ |
832 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
4e96a774 | 833 | list_for_each_entry(cm_node, hte, list) { |
3c2d774c GS |
834 | /* compare quad, return node handle if a match */ |
835 | nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n", | |
836 | cm_node->loc_addr, cm_node->loc_port, | |
837 | loc_addr, loc_port, | |
838 | cm_node->rem_addr, cm_node->rem_port, | |
839 | rem_addr, rem_port); | |
840 | if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) && | |
841 | (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) { | |
842 | add_ref_cm_node(cm_node); | |
843 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
844 | return cm_node; | |
845 | } | |
846 | } | |
847 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
848 | ||
849 | /* no owner node */ | |
850 | return NULL; | |
851 | } | |
852 | ||
853 | ||
854 | /** | |
855 | * find_listener - find a cm node listening on this addr-port pair | |
856 | */ | |
857 | static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core, | |
858 | nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state) | |
859 | { | |
860 | unsigned long flags; | |
3c2d774c | 861 | struct nes_cm_listener *listen_node; |
03080e5c | 862 | __be32 tmp_addr = cpu_to_be32(dst_addr); |
3c2d774c GS |
863 | |
864 | /* walk list and find cm_node associated with this session ID */ | |
865 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); | |
4e96a774 | 866 | list_for_each_entry(listen_node, &cm_core->listen_list.list, list) { |
3c2d774c GS |
867 | /* compare node pair, return node handle if a match */ |
868 | if (((listen_node->loc_addr == dst_addr) || | |
869 | listen_node->loc_addr == 0x00000000) && | |
870 | (listen_node->loc_port == dst_port) && | |
871 | (listener_state & listen_node->listener_state)) { | |
872 | atomic_inc(&listen_node->ref_count); | |
873 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
874 | return listen_node; | |
875 | } | |
876 | } | |
877 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
878 | ||
63779436 | 879 | nes_debug(NES_DBG_CM, "Unable to find listener for %pI4:%x\n", |
03080e5c | 880 | &tmp_addr, dst_port); |
3c2d774c GS |
881 | |
882 | /* no listener */ | |
883 | return NULL; | |
884 | } | |
885 | ||
886 | ||
887 | /** | |
888 | * add_hte_node - add a cm node to the hash table | |
889 | */ | |
890 | static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node) | |
891 | { | |
892 | unsigned long flags; | |
3c2d774c GS |
893 | struct list_head *hte; |
894 | ||
895 | if (!cm_node || !cm_core) | |
896 | return -EINVAL; | |
897 | ||
6492cdf3 FL |
898 | nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n", |
899 | cm_node); | |
3c2d774c | 900 | |
3c2d774c GS |
901 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
902 | ||
903 | /* get a handle on the hash table element (list head for this slot) */ | |
904 | hte = &cm_core->connected_nodes; | |
905 | list_add_tail(&cm_node->list, hte); | |
906 | atomic_inc(&cm_core->ht_node_cnt); | |
907 | ||
908 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
913 | ||
914 | /** | |
915 | * mini_cm_dec_refcnt_listen | |
916 | */ | |
917 | static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core, | |
6492cdf3 | 918 | struct nes_cm_listener *listener, int free_hanging_nodes) |
3c2d774c | 919 | { |
9d5ab133 FL |
920 | int ret = -EINVAL; |
921 | int err = 0; | |
3c2d774c | 922 | unsigned long flags; |
6492cdf3 FL |
923 | struct list_head *list_pos = NULL; |
924 | struct list_head *list_temp = NULL; | |
925 | struct nes_cm_node *cm_node = NULL; | |
879e5bd5 | 926 | struct list_head reset_list; |
6492cdf3 FL |
927 | |
928 | nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, " | |
929 | "refcnt=%d\n", listener, free_hanging_nodes, | |
930 | atomic_read(&listener->ref_count)); | |
931 | /* free non-accelerated child nodes for this listener */ | |
879e5bd5 | 932 | INIT_LIST_HEAD(&reset_list); |
6492cdf3 FL |
933 | if (free_hanging_nodes) { |
934 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
935 | list_for_each_safe(list_pos, list_temp, | |
879e5bd5 | 936 | &g_cm_core->connected_nodes) { |
6492cdf3 FL |
937 | cm_node = container_of(list_pos, struct nes_cm_node, |
938 | list); | |
939 | if ((cm_node->listener == listener) && | |
879e5bd5 FL |
940 | (!cm_node->accelerated)) { |
941 | add_ref_cm_node(cm_node); | |
942 | list_add(&cm_node->reset_entry, &reset_list); | |
6492cdf3 FL |
943 | } |
944 | } | |
945 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
946 | } | |
879e5bd5 FL |
947 | |
948 | list_for_each_safe(list_pos, list_temp, &reset_list) { | |
949 | cm_node = container_of(list_pos, struct nes_cm_node, | |
9d5ab133 FL |
950 | reset_entry); |
951 | { | |
952 | struct nes_cm_node *loopback = cm_node->loopbackpartner; | |
953 | if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) { | |
954 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
955 | } else { | |
956 | if (!loopback) { | |
957 | cleanup_retrans_entry(cm_node); | |
958 | err = send_reset(cm_node, NULL); | |
959 | if (err) { | |
960 | cm_node->state = | |
961 | NES_CM_STATE_CLOSED; | |
962 | WARN_ON(1); | |
963 | } else { | |
964 | cm_node->state = | |
965 | NES_CM_STATE_CLOSED; | |
966 | rem_ref_cm_node( | |
967 | cm_node->cm_core, | |
968 | cm_node); | |
969 | } | |
970 | } else { | |
971 | struct nes_cm_event event; | |
972 | ||
973 | event.cm_node = loopback; | |
974 | event.cm_info.rem_addr = | |
975 | loopback->rem_addr; | |
976 | event.cm_info.loc_addr = | |
977 | loopback->loc_addr; | |
978 | event.cm_info.rem_port = | |
979 | loopback->rem_port; | |
980 | event.cm_info.loc_port = | |
981 | loopback->loc_port; | |
982 | event.cm_info.cm_id = loopback->cm_id; | |
983 | cm_event_connect_error(&event); | |
984 | loopback->state = NES_CM_STATE_CLOSED; | |
985 | ||
986 | event.cm_node = cm_node; | |
987 | event.cm_info.rem_addr = | |
988 | cm_node->rem_addr; | |
989 | event.cm_info.loc_addr = | |
990 | cm_node->loc_addr; | |
991 | event.cm_info.rem_port = | |
992 | cm_node->rem_port; | |
993 | event.cm_info.loc_port = | |
994 | cm_node->loc_port; | |
995 | event.cm_info.cm_id = cm_node->cm_id; | |
996 | cm_event_reset(&event); | |
997 | ||
998 | rem_ref_cm_node(cm_node->cm_core, | |
999 | cm_node); | |
1000 | ||
1001 | } | |
1002 | } | |
1003 | } | |
879e5bd5 FL |
1004 | } |
1005 | ||
3c2d774c GS |
1006 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
1007 | if (!atomic_dec_return(&listener->ref_count)) { | |
1008 | list_del(&listener->list); | |
1009 | ||
1010 | /* decrement our listen node count */ | |
1011 | atomic_dec(&cm_core->listen_node_cnt); | |
1012 | ||
1013 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
1014 | ||
1015 | if (listener->nesvnic) { | |
1016 | nes_manage_apbvt(listener->nesvnic, listener->loc_port, | |
1017 | PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL); | |
1018 | } | |
1019 | ||
1020 | nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener); | |
1021 | ||
1022 | kfree(listener); | |
a2e9c384 | 1023 | listener = NULL; |
3c2d774c GS |
1024 | ret = 0; |
1025 | cm_listens_destroyed++; | |
1026 | } else { | |
1027 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
1028 | } | |
1029 | if (listener) { | |
1030 | if (atomic_read(&listener->pend_accepts_cnt) > 0) | |
1031 | nes_debug(NES_DBG_CM, "destroying listener (%p)" | |
1032 | " with non-zero pending accepts=%u\n", | |
1033 | listener, atomic_read(&listener->pend_accepts_cnt)); | |
1034 | } | |
1035 | ||
1036 | return ret; | |
1037 | } | |
1038 | ||
1039 | ||
1040 | /** | |
1041 | * mini_cm_del_listen | |
1042 | */ | |
1043 | static int mini_cm_del_listen(struct nes_cm_core *cm_core, | |
1044 | struct nes_cm_listener *listener) | |
1045 | { | |
1046 | listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE; | |
1047 | listener->cm_id = NULL; /* going to be destroyed pretty soon */ | |
1048 | return mini_cm_dec_refcnt_listen(cm_core, listener, 1); | |
1049 | } | |
1050 | ||
1051 | ||
1052 | /** | |
1053 | * mini_cm_accelerated | |
1054 | */ | |
1055 | static inline int mini_cm_accelerated(struct nes_cm_core *cm_core, | |
1056 | struct nes_cm_node *cm_node) | |
1057 | { | |
1058 | u32 was_timer_set; | |
1059 | cm_node->accelerated = 1; | |
1060 | ||
1061 | if (cm_node->accept_pend) { | |
1062 | BUG_ON(!cm_node->listener); | |
1063 | atomic_dec(&cm_node->listener->pend_accepts_cnt); | |
9d5ab133 | 1064 | cm_node->accept_pend = 0; |
3c2d774c GS |
1065 | BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); |
1066 | } | |
1067 | ||
1068 | was_timer_set = timer_pending(&cm_core->tcp_timer); | |
1069 | if (!was_timer_set) { | |
1070 | cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME; | |
1071 | add_timer(&cm_core->tcp_timer); | |
1072 | } | |
1073 | ||
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | ||
1078 | /** | |
7191a0a1 | 1079 | * nes_addr_resolve_neigh |
3c2d774c | 1080 | */ |
7191a0a1 | 1081 | static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip) |
3c2d774c GS |
1082 | { |
1083 | struct rtable *rt; | |
1084 | struct flowi fl; | |
7191a0a1 BS |
1085 | struct neighbour *neigh; |
1086 | int rc = -1; | |
3c2d774c GS |
1087 | |
1088 | memset(&fl, 0, sizeof fl); | |
1089 | fl.nl_u.ip4_u.daddr = htonl(dst_ip); | |
1090 | if (ip_route_output_key(&init_net, &rt, &fl)) { | |
9d5ab133 | 1091 | printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n", |
33718363 | 1092 | __func__, dst_ip); |
7191a0a1 | 1093 | return rc; |
3c2d774c GS |
1094 | } |
1095 | ||
7191a0a1 BS |
1096 | neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev); |
1097 | if (neigh) { | |
1098 | if (neigh->nud_state & NUD_VALID) { | |
1099 | nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X" | |
e174961c JB |
1100 | " is %pM, Gateway is 0x%08X \n", dst_ip, |
1101 | neigh->ha, ntohl(rt->rt_gateway)); | |
7191a0a1 BS |
1102 | nes_manage_arp_cache(nesvnic->netdev, neigh->ha, |
1103 | dst_ip, NES_ARP_ADD); | |
1104 | rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL, | |
1105 | NES_ARP_RESOLVE); | |
1106 | } | |
1107 | neigh_release(neigh); | |
1108 | } | |
1109 | ||
1110 | if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID))) | |
1111 | neigh_event_send(rt->u.dst.neighbour, NULL); | |
1112 | ||
3c2d774c | 1113 | ip_rt_put(rt); |
7191a0a1 | 1114 | return rc; |
3c2d774c GS |
1115 | } |
1116 | ||
1117 | ||
1118 | /** | |
1119 | * make_cm_node - create a new instance of a cm node | |
1120 | */ | |
1121 | static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core, | |
1122 | struct nes_vnic *nesvnic, struct nes_cm_info *cm_info, | |
1123 | struct nes_cm_listener *listener) | |
1124 | { | |
1125 | struct nes_cm_node *cm_node; | |
1126 | struct timespec ts; | |
1127 | int arpindex = 0; | |
1128 | struct nes_device *nesdev; | |
1129 | struct nes_adapter *nesadapter; | |
1130 | ||
1131 | /* create an hte and cm_node for this instance */ | |
1132 | cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); | |
1133 | if (!cm_node) | |
1134 | return NULL; | |
1135 | ||
1136 | /* set our node specific transport info */ | |
1137 | cm_node->loc_addr = cm_info->loc_addr; | |
1138 | cm_node->rem_addr = cm_info->rem_addr; | |
1139 | cm_node->loc_port = cm_info->loc_port; | |
1140 | cm_node->rem_port = cm_info->rem_port; | |
1141 | cm_node->send_write0 = send_first; | |
63779436 HH |
1142 | nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n", |
1143 | &cm_node->loc_addr, cm_node->loc_port, | |
1144 | &cm_node->rem_addr, cm_node->rem_port); | |
3c2d774c GS |
1145 | cm_node->listener = listener; |
1146 | cm_node->netdev = nesvnic->netdev; | |
1147 | cm_node->cm_id = cm_info->cm_id; | |
1148 | memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN); | |
1149 | ||
6492cdf3 FL |
1150 | nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener, |
1151 | cm_node->cm_id); | |
3c2d774c | 1152 | |
3c2d774c | 1153 | spin_lock_init(&cm_node->retrans_list_lock); |
3c2d774c GS |
1154 | |
1155 | cm_node->loopbackpartner = NULL; | |
1156 | atomic_set(&cm_node->ref_count, 1); | |
1157 | /* associate our parent CM core */ | |
1158 | cm_node->cm_core = cm_core; | |
1159 | cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID; | |
1160 | cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; | |
1161 | cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >> | |
1162 | NES_CM_DEFAULT_RCV_WND_SCALE; | |
1163 | ts = current_kernel_time(); | |
1164 | cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec); | |
1165 | cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) - | |
f2b2b59b | 1166 | sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN; |
3c2d774c GS |
1167 | cm_node->tcp_cntxt.rcv_nxt = 0; |
1168 | /* get a unique session ID , add thread_id to an upcounter to handle race */ | |
1169 | atomic_inc(&cm_core->node_cnt); | |
3c2d774c GS |
1170 | cm_node->conn_type = cm_info->conn_type; |
1171 | cm_node->apbvt_set = 0; | |
1172 | cm_node->accept_pend = 0; | |
1173 | ||
1174 | cm_node->nesvnic = nesvnic; | |
1175 | /* get some device handles, for arp lookup */ | |
1176 | nesdev = nesvnic->nesdev; | |
1177 | nesadapter = nesdev->nesadapter; | |
1178 | ||
1179 | cm_node->loopbackpartner = NULL; | |
1180 | /* get the mac addr for the remote node */ | |
1ee86555 CT |
1181 | if (ipv4_is_loopback(htonl(cm_node->rem_addr))) |
1182 | arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE); | |
1183 | else | |
1184 | arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE); | |
3c2d774c | 1185 | if (arpindex < 0) { |
7191a0a1 BS |
1186 | arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr); |
1187 | if (arpindex < 0) { | |
1188 | kfree(cm_node); | |
1189 | return NULL; | |
1190 | } | |
3c2d774c GS |
1191 | } |
1192 | ||
1193 | /* copy the mac addr to node context */ | |
1194 | memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN); | |
e174961c JB |
1195 | nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n", |
1196 | cm_node->rem_mac); | |
3c2d774c GS |
1197 | |
1198 | add_hte_node(cm_core, cm_node); | |
1199 | atomic_inc(&cm_nodes_created); | |
1200 | ||
1201 | return cm_node; | |
1202 | } | |
1203 | ||
1204 | ||
1205 | /** | |
1206 | * add_ref_cm_node - destroy an instance of a cm node | |
1207 | */ | |
1208 | static int add_ref_cm_node(struct nes_cm_node *cm_node) | |
1209 | { | |
1210 | atomic_inc(&cm_node->ref_count); | |
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | ||
1215 | /** | |
1216 | * rem_ref_cm_node - destroy an instance of a cm node | |
1217 | */ | |
1218 | static int rem_ref_cm_node(struct nes_cm_core *cm_core, | |
6492cdf3 | 1219 | struct nes_cm_node *cm_node) |
3c2d774c | 1220 | { |
9d5ab133 | 1221 | unsigned long flags; |
3c2d774c GS |
1222 | struct nes_qp *nesqp; |
1223 | ||
1224 | if (!cm_node) | |
1225 | return -EINVAL; | |
1226 | ||
1227 | spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); | |
1228 | if (atomic_dec_return(&cm_node->ref_count)) { | |
1229 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); | |
1230 | return 0; | |
1231 | } | |
1232 | list_del(&cm_node->list); | |
1233 | atomic_dec(&cm_core->ht_node_cnt); | |
1234 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); | |
1235 | ||
1236 | /* if the node is destroyed before connection was accelerated */ | |
1237 | if (!cm_node->accelerated && cm_node->accept_pend) { | |
1238 | BUG_ON(!cm_node->listener); | |
1239 | atomic_dec(&cm_node->listener->pend_accepts_cnt); | |
1240 | BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); | |
1241 | } | |
9d5ab133 FL |
1242 | WARN_ON(cm_node->send_entry); |
1243 | if (cm_node->recv_entry) | |
1244 | handle_recv_entry(cm_node, 0); | |
3c2d774c GS |
1245 | if (cm_node->listener) { |
1246 | mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0); | |
1247 | } else { | |
1248 | if (cm_node->apbvt_set && cm_node->nesvnic) { | |
1249 | nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port, | |
6492cdf3 FL |
1250 | PCI_FUNC( |
1251 | cm_node->nesvnic->nesdev->pcidev->devfn), | |
1252 | NES_MANAGE_APBVT_DEL); | |
3c2d774c GS |
1253 | } |
1254 | } | |
1255 | ||
3c2d774c GS |
1256 | atomic_dec(&cm_core->node_cnt); |
1257 | atomic_inc(&cm_nodes_destroyed); | |
6492cdf3 FL |
1258 | nesqp = cm_node->nesqp; |
1259 | if (nesqp) { | |
1260 | nesqp->cm_node = NULL; | |
1261 | nes_rem_ref(&nesqp->ibqp); | |
1262 | cm_node->nesqp = NULL; | |
1263 | } | |
3c2d774c | 1264 | |
6492cdf3 FL |
1265 | cm_node->freed = 1; |
1266 | kfree(cm_node); | |
3c2d774c GS |
1267 | return 0; |
1268 | } | |
1269 | ||
3c2d774c GS |
1270 | /** |
1271 | * process_options | |
1272 | */ | |
6492cdf3 FL |
1273 | static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc, |
1274 | u32 optionsize, u32 syn_packet) | |
3c2d774c GS |
1275 | { |
1276 | u32 tmp; | |
1277 | u32 offset = 0; | |
1278 | union all_known_options *all_options; | |
1279 | char got_mss_option = 0; | |
1280 | ||
1281 | while (offset < optionsize) { | |
1282 | all_options = (union all_known_options *)(optionsloc + offset); | |
1283 | switch (all_options->as_base.optionnum) { | |
6492cdf3 FL |
1284 | case OPTION_NUMBER_END: |
1285 | offset = optionsize; | |
1286 | break; | |
1287 | case OPTION_NUMBER_NONE: | |
1288 | offset += 1; | |
1289 | continue; | |
1290 | case OPTION_NUMBER_MSS: | |
1291 | nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d " | |
1292 | "Size: %d\n", __func__, | |
1293 | all_options->as_mss.length, offset, optionsize); | |
1294 | got_mss_option = 1; | |
1295 | if (all_options->as_mss.length != 4) { | |
1296 | return 1; | |
1297 | } else { | |
1298 | tmp = ntohs(all_options->as_mss.mss); | |
1299 | if (tmp > 0 && tmp < | |
1300 | cm_node->tcp_cntxt.mss) | |
1301 | cm_node->tcp_cntxt.mss = tmp; | |
1302 | } | |
1303 | break; | |
1304 | case OPTION_NUMBER_WINDOW_SCALE: | |
1305 | cm_node->tcp_cntxt.snd_wscale = | |
1306 | all_options->as_windowscale.shiftcount; | |
1307 | break; | |
1308 | case OPTION_NUMBER_WRITE0: | |
1309 | cm_node->send_write0 = 1; | |
1310 | break; | |
1311 | default: | |
1312 | nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n", | |
1313 | all_options->as_base.optionnum); | |
1314 | break; | |
3c2d774c GS |
1315 | } |
1316 | offset += all_options->as_base.length; | |
1317 | } | |
1318 | if ((!got_mss_option) && (syn_packet)) | |
1319 | cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS; | |
1320 | return 0; | |
1321 | } | |
1322 | ||
6492cdf3 FL |
1323 | static void drop_packet(struct sk_buff *skb) |
1324 | { | |
1325 | atomic_inc(&cm_accel_dropped_pkts); | |
1326 | dev_kfree_skb_any(skb); | |
1327 | } | |
3c2d774c | 1328 | |
9d5ab133 | 1329 | static void handle_fin_pkt(struct nes_cm_node *cm_node) |
3c2d774c | 1330 | { |
6492cdf3 FL |
1331 | nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. " |
1332 | "refcnt=%d\n", cm_node, cm_node->state, | |
1333 | atomic_read(&cm_node->ref_count)); | |
1334 | cm_node->tcp_cntxt.rcv_nxt++; | |
1335 | cleanup_retrans_entry(cm_node); | |
1336 | switch (cm_node->state) { | |
1337 | case NES_CM_STATE_SYN_RCVD: | |
1338 | case NES_CM_STATE_SYN_SENT: | |
1339 | case NES_CM_STATE_ESTABLISHED: | |
1340 | case NES_CM_STATE_MPAREQ_SENT: | |
9d5ab133 | 1341 | case NES_CM_STATE_MPAREJ_RCVD: |
6492cdf3 | 1342 | cm_node->state = NES_CM_STATE_LAST_ACK; |
9d5ab133 | 1343 | send_fin(cm_node, NULL); |
6492cdf3 FL |
1344 | break; |
1345 | case NES_CM_STATE_FIN_WAIT1: | |
1346 | cm_node->state = NES_CM_STATE_CLOSING; | |
9d5ab133 FL |
1347 | send_ack(cm_node, NULL); |
1348 | /* Wait for ACK as this is simultanous close.. | |
1349 | * After we receive ACK, do not send anything.. | |
1350 | * Just rm the node.. Done.. */ | |
6492cdf3 FL |
1351 | break; |
1352 | case NES_CM_STATE_FIN_WAIT2: | |
1353 | cm_node->state = NES_CM_STATE_TIME_WAIT; | |
9d5ab133 FL |
1354 | send_ack(cm_node, NULL); |
1355 | schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0); | |
1356 | break; | |
1357 | case NES_CM_STATE_TIME_WAIT: | |
6492cdf3 | 1358 | cm_node->state = NES_CM_STATE_CLOSED; |
9d5ab133 | 1359 | rem_ref_cm_node(cm_node->cm_core, cm_node); |
6492cdf3 FL |
1360 | break; |
1361 | case NES_CM_STATE_TSA: | |
1362 | default: | |
1363 | nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n", | |
1364 | cm_node, cm_node->state); | |
6492cdf3 | 1365 | break; |
3c2d774c | 1366 | } |
6492cdf3 | 1367 | } |
3c2d774c | 1368 | |
3c2d774c | 1369 | |
6492cdf3 FL |
1370 | static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1371 | struct tcphdr *tcph) | |
1372 | { | |
3c2d774c | 1373 | |
6492cdf3 | 1374 | int reset = 0; /* whether to send reset in case of err.. */ |
183ecfa3 | 1375 | int passive_state; |
6492cdf3 FL |
1376 | atomic_inc(&cm_resets_recvd); |
1377 | nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u." | |
1378 | " refcnt=%d\n", cm_node, cm_node->state, | |
1379 | atomic_read(&cm_node->ref_count)); | |
1380 | cleanup_retrans_entry(cm_node); | |
1381 | switch (cm_node->state) { | |
1382 | case NES_CM_STATE_SYN_SENT: | |
1383 | case NES_CM_STATE_MPAREQ_SENT: | |
1384 | nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p " | |
1385 | "listener=%p state=%d\n", __func__, __LINE__, cm_node, | |
1386 | cm_node->listener, cm_node->state); | |
1387 | active_open_err(cm_node, skb, reset); | |
1388 | break; | |
183ecfa3 FL |
1389 | case NES_CM_STATE_MPAREQ_RCVD: |
1390 | passive_state = atomic_add_return(1, &cm_node->passive_state); | |
1391 | if (passive_state == NES_SEND_RESET_EVENT) | |
1392 | create_event(cm_node, NES_CM_EVENT_RESET); | |
1393 | cleanup_retrans_entry(cm_node); | |
1394 | cm_node->state = NES_CM_STATE_CLOSED; | |
1395 | dev_kfree_skb_any(skb); | |
1396 | break; | |
6492cdf3 FL |
1397 | case NES_CM_STATE_ESTABLISHED: |
1398 | case NES_CM_STATE_SYN_RCVD: | |
1399 | case NES_CM_STATE_LISTENING: | |
1400 | nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__); | |
1401 | passive_open_err(cm_node, skb, reset); | |
1402 | break; | |
1403 | case NES_CM_STATE_TSA: | |
183ecfa3 FL |
1404 | active_open_err(cm_node, skb, reset); |
1405 | break; | |
1406 | case NES_CM_STATE_CLOSED: | |
1407 | cleanup_retrans_entry(cm_node); | |
1408 | drop_packet(skb); | |
1409 | break; | |
9d5ab133 FL |
1410 | case NES_CM_STATE_TIME_WAIT: |
1411 | cleanup_retrans_entry(cm_node); | |
1412 | cm_node->state = NES_CM_STATE_CLOSED; | |
1413 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
1414 | drop_packet(skb); | |
1415 | break; | |
1416 | case NES_CM_STATE_FIN_WAIT1: | |
1417 | cleanup_retrans_entry(cm_node); | |
1418 | nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__); | |
6492cdf3 | 1419 | default: |
183ecfa3 | 1420 | drop_packet(skb); |
6492cdf3 FL |
1421 | break; |
1422 | } | |
1423 | } | |
3c2d774c | 1424 | |
9d5ab133 FL |
1425 | |
1426 | static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb) | |
6492cdf3 FL |
1427 | { |
1428 | ||
9d5ab133 | 1429 | int ret = 0; |
6492cdf3 FL |
1430 | int datasize = skb->len; |
1431 | u8 *dataloc = skb->data; | |
9d5ab133 FL |
1432 | |
1433 | enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN; | |
1434 | u32 res_type; | |
1435 | ret = parse_mpa(cm_node, dataloc, &res_type, datasize); | |
1436 | if (ret) { | |
6492cdf3 | 1437 | nes_debug(NES_DBG_CM, "didn't like MPA Request\n"); |
9d5ab133 | 1438 | if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) { |
6492cdf3 FL |
1439 | nes_debug(NES_DBG_CM, "%s[%u] create abort for " |
1440 | "cm_node=%p listener=%p state=%d\n", __func__, | |
1441 | __LINE__, cm_node, cm_node->listener, | |
1442 | cm_node->state); | |
1443 | active_open_err(cm_node, skb, 1); | |
1444 | } else { | |
1445 | passive_open_err(cm_node, skb, 1); | |
3c2d774c | 1446 | } |
9d5ab133 FL |
1447 | return; |
1448 | } | |
1449 | ||
1450 | switch (cm_node->state) { | |
1451 | case NES_CM_STATE_ESTABLISHED: | |
1452 | if (res_type == NES_MPA_REQUEST_REJECT) { | |
1453 | /*BIG problem as we are receiving the MPA.. So should | |
1454 | * not be REJECT.. This is Passive Open.. We can | |
1455 | * only receive it Reject for Active Open...*/ | |
1456 | WARN_ON(1); | |
1457 | } | |
1458 | cm_node->state = NES_CM_STATE_MPAREQ_RCVD; | |
1459 | type = NES_CM_EVENT_MPA_REQ; | |
1460 | atomic_set(&cm_node->passive_state, | |
1461 | NES_PASSIVE_STATE_INDICATED); | |
1462 | break; | |
1463 | case NES_CM_STATE_MPAREQ_SENT: | |
1464 | if (res_type == NES_MPA_REQUEST_REJECT) { | |
1465 | type = NES_CM_EVENT_MPA_REJECT; | |
1466 | cm_node->state = NES_CM_STATE_MPAREJ_RCVD; | |
1467 | } else { | |
1468 | type = NES_CM_EVENT_CONNECTED; | |
6492cdf3 | 1469 | cm_node->state = NES_CM_STATE_TSA; |
9d5ab133 | 1470 | } |
6492cdf3 | 1471 | |
9d5ab133 FL |
1472 | break; |
1473 | default: | |
1474 | WARN_ON(1); | |
1475 | break; | |
6492cdf3 | 1476 | } |
9d5ab133 FL |
1477 | dev_kfree_skb_any(skb); |
1478 | create_event(cm_node, type); | |
6492cdf3 FL |
1479 | } |
1480 | ||
1481 | static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb) | |
1482 | { | |
1483 | switch (cm_node->state) { | |
1484 | case NES_CM_STATE_SYN_SENT: | |
1485 | case NES_CM_STATE_MPAREQ_SENT: | |
1486 | nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p " | |
1487 | "listener=%p state=%d\n", __func__, __LINE__, cm_node, | |
1488 | cm_node->listener, cm_node->state); | |
1489 | active_open_err(cm_node, skb, 1); | |
1490 | break; | |
1491 | case NES_CM_STATE_ESTABLISHED: | |
1492 | case NES_CM_STATE_SYN_RCVD: | |
1493 | passive_open_err(cm_node, skb, 1); | |
1494 | break; | |
1495 | case NES_CM_STATE_TSA: | |
1496 | default: | |
1497 | drop_packet(skb); | |
3c2d774c | 1498 | } |
6492cdf3 FL |
1499 | } |
1500 | ||
1501 | static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph, | |
1502 | struct sk_buff *skb) | |
1503 | { | |
1504 | int err; | |
1505 | ||
1506 | err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1; | |
1507 | if (err) | |
1508 | active_open_err(cm_node, skb, 1); | |
1509 | ||
1510 | return err; | |
1511 | } | |
1512 | ||
1513 | static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph, | |
1514 | struct sk_buff *skb) | |
1515 | { | |
1516 | int err = 0; | |
1517 | u32 seq; | |
1518 | u32 ack_seq; | |
1519 | u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; | |
1520 | u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; | |
1521 | u32 rcv_wnd; | |
1522 | seq = ntohl(tcph->seq); | |
1523 | ack_seq = ntohl(tcph->ack_seq); | |
1524 | rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; | |
1525 | if (ack_seq != loc_seq_num) | |
1526 | err = 1; | |
1527 | else if ((seq + rcv_wnd) < rcv_nxt) | |
1528 | err = 1; | |
1529 | if (err) { | |
1530 | nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p " | |
1531 | "listener=%p state=%d\n", __func__, __LINE__, cm_node, | |
1532 | cm_node->listener, cm_node->state); | |
1533 | indicate_pkt_err(cm_node, skb); | |
1534 | nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X " | |
1535 | "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt, | |
1536 | rcv_wnd); | |
1537 | } | |
1538 | return err; | |
1539 | } | |
1540 | ||
1541 | /* | |
1542 | * handle_syn_pkt() is for Passive node. The syn packet is received when a node | |
1543 | * is created with a listener or it may comein as rexmitted packet which in | |
1544 | * that case will be just dropped. | |
1545 | */ | |
1546 | ||
1547 | static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
1548 | struct tcphdr *tcph) | |
1549 | { | |
1550 | int ret; | |
1551 | u32 inc_sequence; | |
1552 | int optionsize; | |
3c2d774c GS |
1553 | |
1554 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); | |
abb77256 | 1555 | skb_trim(skb, 0); |
6492cdf3 | 1556 | inc_sequence = ntohl(tcph->seq); |
3c2d774c | 1557 | |
6492cdf3 FL |
1558 | switch (cm_node->state) { |
1559 | case NES_CM_STATE_SYN_SENT: | |
1560 | case NES_CM_STATE_MPAREQ_SENT: | |
1561 | /* Rcvd syn on active open connection*/ | |
1562 | active_open_err(cm_node, skb, 1); | |
1563 | break; | |
1564 | case NES_CM_STATE_LISTENING: | |
1565 | /* Passive OPEN */ | |
6492cdf3 FL |
1566 | if (atomic_read(&cm_node->listener->pend_accepts_cnt) > |
1567 | cm_node->listener->backlog) { | |
1568 | nes_debug(NES_DBG_CM, "drop syn due to backlog " | |
1569 | "pressure \n"); | |
1570 | cm_backlog_drops++; | |
1571 | passive_open_err(cm_node, skb, 0); | |
1572 | break; | |
1573 | } | |
1574 | ret = handle_tcp_options(cm_node, tcph, skb, optionsize, | |
1575 | 1); | |
1576 | if (ret) { | |
1577 | passive_open_err(cm_node, skb, 0); | |
1578 | /* drop pkt */ | |
1579 | break; | |
1580 | } | |
1581 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; | |
1582 | BUG_ON(cm_node->send_entry); | |
9d5ab133 FL |
1583 | cm_node->accept_pend = 1; |
1584 | atomic_inc(&cm_node->listener->pend_accepts_cnt); | |
1585 | ||
6492cdf3 FL |
1586 | cm_node->state = NES_CM_STATE_SYN_RCVD; |
1587 | send_syn(cm_node, 1, skb); | |
1588 | break; | |
abb77256 FL |
1589 | case NES_CM_STATE_CLOSED: |
1590 | cleanup_retrans_entry(cm_node); | |
1591 | send_reset(cm_node, skb); | |
1592 | break; | |
6492cdf3 FL |
1593 | case NES_CM_STATE_TSA: |
1594 | case NES_CM_STATE_ESTABLISHED: | |
1595 | case NES_CM_STATE_FIN_WAIT1: | |
1596 | case NES_CM_STATE_FIN_WAIT2: | |
1597 | case NES_CM_STATE_MPAREQ_RCVD: | |
1598 | case NES_CM_STATE_LAST_ACK: | |
1599 | case NES_CM_STATE_CLOSING: | |
1600 | case NES_CM_STATE_UNKNOWN: | |
6492cdf3 FL |
1601 | default: |
1602 | drop_packet(skb); | |
1603 | break; | |
1604 | } | |
1605 | } | |
1606 | ||
1607 | static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
1608 | struct tcphdr *tcph) | |
1609 | { | |
1610 | ||
1611 | int ret; | |
1612 | u32 inc_sequence; | |
1613 | int optionsize; | |
1614 | ||
1615 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); | |
abb77256 | 1616 | skb_trim(skb, 0); |
6492cdf3 FL |
1617 | inc_sequence = ntohl(tcph->seq); |
1618 | switch (cm_node->state) { | |
1619 | case NES_CM_STATE_SYN_SENT: | |
9d5ab133 | 1620 | cleanup_retrans_entry(cm_node); |
6492cdf3 FL |
1621 | /* active open */ |
1622 | if (check_syn(cm_node, tcph, skb)) | |
1623 | return; | |
1624 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); | |
1625 | /* setup options */ | |
1626 | ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0); | |
1627 | if (ret) { | |
1628 | nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n", | |
1629 | cm_node); | |
1630 | break; | |
1631 | } | |
1632 | cleanup_retrans_entry(cm_node); | |
1633 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; | |
1634 | send_mpa_request(cm_node, skb); | |
1635 | cm_node->state = NES_CM_STATE_MPAREQ_SENT; | |
1636 | break; | |
1637 | case NES_CM_STATE_MPAREQ_RCVD: | |
1638 | /* passive open, so should not be here */ | |
1639 | passive_open_err(cm_node, skb, 1); | |
1640 | break; | |
abb77256 FL |
1641 | case NES_CM_STATE_LISTENING: |
1642 | case NES_CM_STATE_CLOSED: | |
1643 | cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); | |
1644 | cleanup_retrans_entry(cm_node); | |
1645 | send_reset(cm_node, skb); | |
1646 | break; | |
6492cdf3 FL |
1647 | case NES_CM_STATE_ESTABLISHED: |
1648 | case NES_CM_STATE_FIN_WAIT1: | |
1649 | case NES_CM_STATE_FIN_WAIT2: | |
1650 | case NES_CM_STATE_LAST_ACK: | |
1651 | case NES_CM_STATE_TSA: | |
1652 | case NES_CM_STATE_CLOSING: | |
1653 | case NES_CM_STATE_UNKNOWN: | |
6492cdf3 FL |
1654 | case NES_CM_STATE_MPAREQ_SENT: |
1655 | default: | |
1656 | drop_packet(skb); | |
1657 | break; | |
1658 | } | |
1659 | } | |
3c2d774c | 1660 | |
6492cdf3 FL |
1661 | static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1662 | struct tcphdr *tcph) | |
1663 | { | |
1664 | int datasize = 0; | |
1665 | u32 inc_sequence; | |
1666 | u32 rem_seq_ack; | |
1667 | u32 rem_seq; | |
abb77256 FL |
1668 | int ret; |
1669 | int optionsize; | |
abb77256 | 1670 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
abb77256 | 1671 | |
6492cdf3 FL |
1672 | if (check_seq(cm_node, tcph, skb)) |
1673 | return; | |
1674 | ||
1675 | skb_pull(skb, tcph->doff << 2); | |
3c2d774c | 1676 | inc_sequence = ntohl(tcph->seq); |
6492cdf3 FL |
1677 | rem_seq = ntohl(tcph->seq); |
1678 | rem_seq_ack = ntohl(tcph->ack_seq); | |
1679 | datasize = skb->len; | |
9d5ab133 | 1680 | cleanup_retrans_entry(cm_node); |
6492cdf3 FL |
1681 | switch (cm_node->state) { |
1682 | case NES_CM_STATE_SYN_RCVD: | |
1683 | /* Passive OPEN */ | |
abb77256 FL |
1684 | ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1); |
1685 | if (ret) | |
1686 | break; | |
6492cdf3 | 1687 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
abb77256 FL |
1688 | if (cm_node->tcp_cntxt.rem_ack_num != |
1689 | cm_node->tcp_cntxt.loc_seq_num) { | |
1690 | nes_debug(NES_DBG_CM, "rem_ack_num != loc_seq_num\n"); | |
1691 | cleanup_retrans_entry(cm_node); | |
1692 | send_reset(cm_node, skb); | |
1693 | return; | |
1694 | } | |
6492cdf3 | 1695 | cm_node->state = NES_CM_STATE_ESTABLISHED; |
9d5ab133 | 1696 | cleanup_retrans_entry(cm_node); |
6492cdf3 FL |
1697 | if (datasize) { |
1698 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; | |
9d5ab133 FL |
1699 | handle_rcv_mpa(cm_node, skb); |
1700 | } else { /* rcvd ACK only */ | |
6492cdf3 FL |
1701 | dev_kfree_skb_any(skb); |
1702 | cleanup_retrans_entry(cm_node); | |
1703 | } | |
1704 | break; | |
1705 | case NES_CM_STATE_ESTABLISHED: | |
1706 | /* Passive OPEN */ | |
9d5ab133 | 1707 | cleanup_retrans_entry(cm_node); |
6492cdf3 FL |
1708 | if (datasize) { |
1709 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; | |
9d5ab133 | 1710 | handle_rcv_mpa(cm_node, skb); |
6492cdf3 FL |
1711 | } else |
1712 | drop_packet(skb); | |
1713 | break; | |
1714 | case NES_CM_STATE_MPAREQ_SENT: | |
9d5ab133 | 1715 | cleanup_retrans_entry(cm_node); |
6492cdf3 FL |
1716 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
1717 | if (datasize) { | |
1718 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; | |
9d5ab133 | 1719 | handle_rcv_mpa(cm_node, skb); |
6492cdf3 FL |
1720 | } else { /* Could be just an ack pkt.. */ |
1721 | cleanup_retrans_entry(cm_node); | |
1722 | dev_kfree_skb_any(skb); | |
3c2d774c | 1723 | } |
6492cdf3 | 1724 | break; |
abb77256 FL |
1725 | case NES_CM_STATE_LISTENING: |
1726 | case NES_CM_STATE_CLOSED: | |
1727 | cleanup_retrans_entry(cm_node); | |
1728 | send_reset(cm_node, skb); | |
1729 | break; | |
9d5ab133 FL |
1730 | case NES_CM_STATE_LAST_ACK: |
1731 | cleanup_retrans_entry(cm_node); | |
1732 | cm_node->state = NES_CM_STATE_CLOSED; | |
1733 | cm_node->cm_id->rem_ref(cm_node->cm_id); | |
1734 | case NES_CM_STATE_CLOSING: | |
1735 | cleanup_retrans_entry(cm_node); | |
1736 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
1737 | drop_packet(skb); | |
1738 | break; | |
6492cdf3 | 1739 | case NES_CM_STATE_FIN_WAIT1: |
9d5ab133 FL |
1740 | cleanup_retrans_entry(cm_node); |
1741 | drop_packet(skb); | |
1742 | cm_node->state = NES_CM_STATE_FIN_WAIT2; | |
1743 | break; | |
6492cdf3 FL |
1744 | case NES_CM_STATE_SYN_SENT: |
1745 | case NES_CM_STATE_FIN_WAIT2: | |
1746 | case NES_CM_STATE_TSA: | |
6492cdf3 | 1747 | case NES_CM_STATE_MPAREQ_RCVD: |
6492cdf3 FL |
1748 | case NES_CM_STATE_UNKNOWN: |
1749 | default: | |
1750 | drop_packet(skb); | |
1751 | break; | |
3c2d774c | 1752 | } |
6492cdf3 | 1753 | } |
3c2d774c | 1754 | |
3c2d774c GS |
1755 | |
1756 | ||
6492cdf3 FL |
1757 | static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, |
1758 | struct sk_buff *skb, int optionsize, int passive) | |
1759 | { | |
1760 | u8 *optionsloc = (u8 *)&tcph[1]; | |
3c2d774c | 1761 | if (optionsize) { |
6492cdf3 FL |
1762 | if (process_options(cm_node, optionsloc, optionsize, |
1763 | (u32)tcph->syn)) { | |
1764 | nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n", | |
1765 | __func__, cm_node); | |
1766 | if (passive) | |
abb77256 | 1767 | passive_open_err(cm_node, skb, 1); |
6492cdf3 | 1768 | else |
abb77256 | 1769 | active_open_err(cm_node, skb, 1); |
6492cdf3 | 1770 | return 1; |
3c2d774c | 1771 | } |
6492cdf3 | 1772 | } |
3c2d774c GS |
1773 | |
1774 | cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << | |
1775 | cm_node->tcp_cntxt.snd_wscale; | |
1776 | ||
6492cdf3 | 1777 | if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) |
3c2d774c | 1778 | cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; |
6492cdf3 FL |
1779 | return 0; |
1780 | } | |
3c2d774c | 1781 | |
6492cdf3 FL |
1782 | /* |
1783 | * active_open_err() will send reset() if flag set.. | |
1784 | * It will also send ABORT event. | |
1785 | */ | |
3c2d774c | 1786 | |
6492cdf3 FL |
1787 | static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1788 | int reset) | |
1789 | { | |
1790 | cleanup_retrans_entry(cm_node); | |
1791 | if (reset) { | |
1792 | nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, " | |
1793 | "state=%d\n", cm_node, cm_node->state); | |
1794 | add_ref_cm_node(cm_node); | |
1795 | send_reset(cm_node, skb); | |
1796 | } else | |
1797 | dev_kfree_skb_any(skb); | |
3c2d774c | 1798 | |
6492cdf3 FL |
1799 | cm_node->state = NES_CM_STATE_CLOSED; |
1800 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
1801 | } | |
3c2d774c | 1802 | |
6492cdf3 FL |
1803 | /* |
1804 | * passive_open_err() will either do a reset() or will free up the skb and | |
1805 | * remove the cm_node. | |
1806 | */ | |
3c2d774c | 1807 | |
6492cdf3 FL |
1808 | static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1809 | int reset) | |
1810 | { | |
1811 | cleanup_retrans_entry(cm_node); | |
1812 | cm_node->state = NES_CM_STATE_CLOSED; | |
1813 | if (reset) { | |
1814 | nes_debug(NES_DBG_CM, "passive_open_err sending RST for " | |
1815 | "cm_node=%p state =%d\n", cm_node, cm_node->state); | |
1816 | send_reset(cm_node, skb); | |
1817 | } else { | |
1818 | dev_kfree_skb_any(skb); | |
1819 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
3c2d774c | 1820 | } |
6492cdf3 | 1821 | } |
3c2d774c | 1822 | |
6492cdf3 FL |
1823 | /* |
1824 | * free_retrans_entry() routines assumes that the retrans_list_lock has | |
1825 | * been acquired before calling. | |
1826 | */ | |
1827 | static void free_retrans_entry(struct nes_cm_node *cm_node) | |
1828 | { | |
1829 | struct nes_timer_entry *send_entry; | |
1830 | send_entry = cm_node->send_entry; | |
1831 | if (send_entry) { | |
1832 | cm_node->send_entry = NULL; | |
1833 | dev_kfree_skb_any(send_entry->skb); | |
1834 | kfree(send_entry); | |
1835 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
3c2d774c | 1836 | } |
6492cdf3 | 1837 | } |
3c2d774c | 1838 | |
6492cdf3 FL |
1839 | static void cleanup_retrans_entry(struct nes_cm_node *cm_node) |
1840 | { | |
1841 | unsigned long flags; | |
3c2d774c | 1842 | |
6492cdf3 FL |
1843 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
1844 | free_retrans_entry(cm_node); | |
1845 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
3c2d774c GS |
1846 | } |
1847 | ||
6492cdf3 FL |
1848 | /** |
1849 | * process_packet | |
1850 | * Returns skb if to be freed, else it will return NULL if already used.. | |
1851 | */ | |
1852 | static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
1853 | struct nes_cm_core *cm_core) | |
1854 | { | |
1855 | enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN; | |
1856 | struct tcphdr *tcph = tcp_hdr(skb); | |
9d5ab133 | 1857 | u32 fin_set = 0; |
6492cdf3 FL |
1858 | skb_pull(skb, ip_hdr(skb)->ihl << 2); |
1859 | ||
1860 | nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d " | |
1861 | "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn, | |
1862 | tcph->ack, tcph->rst, tcph->fin); | |
1863 | ||
1864 | if (tcph->rst) | |
1865 | pkt_type = NES_PKT_TYPE_RST; | |
1866 | else if (tcph->syn) { | |
1867 | pkt_type = NES_PKT_TYPE_SYN; | |
1868 | if (tcph->ack) | |
1869 | pkt_type = NES_PKT_TYPE_SYNACK; | |
9d5ab133 | 1870 | } else if (tcph->ack) |
6492cdf3 | 1871 | pkt_type = NES_PKT_TYPE_ACK; |
9d5ab133 FL |
1872 | if (tcph->fin) |
1873 | fin_set = 1; | |
6492cdf3 FL |
1874 | |
1875 | switch (pkt_type) { | |
1876 | case NES_PKT_TYPE_SYN: | |
1877 | handle_syn_pkt(cm_node, skb, tcph); | |
1878 | break; | |
1879 | case NES_PKT_TYPE_SYNACK: | |
1880 | handle_synack_pkt(cm_node, skb, tcph); | |
1881 | break; | |
1882 | case NES_PKT_TYPE_ACK: | |
1883 | handle_ack_pkt(cm_node, skb, tcph); | |
9d5ab133 FL |
1884 | if (fin_set) |
1885 | handle_fin_pkt(cm_node); | |
6492cdf3 FL |
1886 | break; |
1887 | case NES_PKT_TYPE_RST: | |
1888 | handle_rst_pkt(cm_node, skb, tcph); | |
1889 | break; | |
6492cdf3 FL |
1890 | default: |
1891 | drop_packet(skb); | |
9d5ab133 FL |
1892 | if (fin_set) |
1893 | handle_fin_pkt(cm_node); | |
6492cdf3 FL |
1894 | break; |
1895 | } | |
1896 | } | |
3c2d774c GS |
1897 | |
1898 | /** | |
1899 | * mini_cm_listen - create a listen node with params | |
1900 | */ | |
1901 | static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core, | |
6492cdf3 | 1902 | struct nes_vnic *nesvnic, struct nes_cm_info *cm_info) |
3c2d774c GS |
1903 | { |
1904 | struct nes_cm_listener *listener; | |
1905 | unsigned long flags; | |
1906 | ||
1907 | nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n", | |
1908 | cm_info->loc_addr, cm_info->loc_port); | |
1909 | ||
1910 | /* cannot have multiple matching listeners */ | |
1911 | listener = find_listener(cm_core, htonl(cm_info->loc_addr), | |
1912 | htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE); | |
1913 | if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) { | |
1914 | /* find automatically incs ref count ??? */ | |
1915 | atomic_dec(&listener->ref_count); | |
1916 | nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n"); | |
1917 | return NULL; | |
1918 | } | |
1919 | ||
1920 | if (!listener) { | |
1921 | /* create a CM listen node (1/2 node to compare incoming traffic to) */ | |
1922 | listener = kzalloc(sizeof(*listener), GFP_ATOMIC); | |
1923 | if (!listener) { | |
1924 | nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n"); | |
1925 | return NULL; | |
1926 | } | |
1927 | ||
3c2d774c GS |
1928 | listener->loc_addr = htonl(cm_info->loc_addr); |
1929 | listener->loc_port = htons(cm_info->loc_port); | |
1930 | listener->reused_node = 0; | |
1931 | ||
1932 | atomic_set(&listener->ref_count, 1); | |
1933 | } | |
1934 | /* pasive case */ | |
1935 | /* find already inc'ed the ref count */ | |
1936 | else { | |
1937 | listener->reused_node = 1; | |
1938 | } | |
1939 | ||
1940 | listener->cm_id = cm_info->cm_id; | |
1941 | atomic_set(&listener->pend_accepts_cnt, 0); | |
1942 | listener->cm_core = cm_core; | |
1943 | listener->nesvnic = nesvnic; | |
1944 | atomic_inc(&cm_core->node_cnt); | |
3c2d774c | 1945 | |
3c2d774c GS |
1946 | listener->conn_type = cm_info->conn_type; |
1947 | listener->backlog = cm_info->backlog; | |
1948 | listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE; | |
1949 | ||
1950 | if (!listener->reused_node) { | |
1951 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); | |
1952 | list_add(&listener->list, &cm_core->listen_list.list); | |
1953 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
1954 | atomic_inc(&cm_core->listen_node_cnt); | |
1955 | } | |
1956 | ||
1957 | nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x," | |
1958 | " listener = %p, backlog = %d, cm_id = %p.\n", | |
1959 | cm_info->loc_addr, cm_info->loc_port, | |
1960 | listener, listener->backlog, listener->cm_id); | |
1961 | ||
1962 | return listener; | |
1963 | } | |
1964 | ||
1965 | ||
1966 | /** | |
1967 | * mini_cm_connect - make a connection node with params | |
1968 | */ | |
54c86a8c | 1969 | static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core, |
6492cdf3 FL |
1970 | struct nes_vnic *nesvnic, u16 private_data_len, |
1971 | void *private_data, struct nes_cm_info *cm_info) | |
3c2d774c GS |
1972 | { |
1973 | int ret = 0; | |
1974 | struct nes_cm_node *cm_node; | |
1975 | struct nes_cm_listener *loopbackremotelistener; | |
1976 | struct nes_cm_node *loopbackremotenode; | |
1977 | struct nes_cm_info loopback_cm_info; | |
6492cdf3 FL |
1978 | u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len; |
1979 | struct ietf_mpa_frame *mpa_frame = NULL; | |
3c2d774c GS |
1980 | |
1981 | /* create a CM connection node */ | |
1982 | cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL); | |
1983 | if (!cm_node) | |
1984 | return NULL; | |
6492cdf3 FL |
1985 | mpa_frame = &cm_node->mpa_frame; |
1986 | strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ); | |
1987 | mpa_frame->flags = IETF_MPA_FLAGS_CRC; | |
1988 | mpa_frame->rev = IETF_MPA_VERSION; | |
1989 | mpa_frame->priv_data_len = htons(private_data_len); | |
3c2d774c | 1990 | |
7495ab68 | 1991 | /* set our node side to client (active) side */ |
3c2d774c GS |
1992 | cm_node->tcp_cntxt.client = 1; |
1993 | cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; | |
1994 | ||
1995 | if (cm_info->loc_addr == cm_info->rem_addr) { | |
6492cdf3 FL |
1996 | loopbackremotelistener = find_listener(cm_core, |
1997 | ntohl(nesvnic->local_ipaddr), cm_node->rem_port, | |
1998 | NES_CM_LISTENER_ACTIVE_STATE); | |
3c2d774c GS |
1999 | if (loopbackremotelistener == NULL) { |
2000 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
2001 | } else { | |
2002 | atomic_inc(&cm_loopbacks); | |
2003 | loopback_cm_info = *cm_info; | |
2004 | loopback_cm_info.loc_port = cm_info->rem_port; | |
2005 | loopback_cm_info.rem_port = cm_info->loc_port; | |
2006 | loopback_cm_info.cm_id = loopbackremotelistener->cm_id; | |
6492cdf3 FL |
2007 | loopbackremotenode = make_cm_node(cm_core, nesvnic, |
2008 | &loopback_cm_info, loopbackremotelistener); | |
3c2d774c | 2009 | loopbackremotenode->loopbackpartner = cm_node; |
6492cdf3 FL |
2010 | loopbackremotenode->tcp_cntxt.rcv_wscale = |
2011 | NES_CM_DEFAULT_RCV_WND_SCALE; | |
3c2d774c | 2012 | cm_node->loopbackpartner = loopbackremotenode; |
6492cdf3 FL |
2013 | memcpy(loopbackremotenode->mpa_frame_buf, private_data, |
2014 | private_data_len); | |
2015 | loopbackremotenode->mpa_frame_size = private_data_len; | |
3c2d774c | 2016 | |
6492cdf3 FL |
2017 | /* we are done handling this state. */ |
2018 | /* set node to a TSA state */ | |
3c2d774c | 2019 | cm_node->state = NES_CM_STATE_TSA; |
6492cdf3 FL |
2020 | cm_node->tcp_cntxt.rcv_nxt = |
2021 | loopbackremotenode->tcp_cntxt.loc_seq_num; | |
2022 | loopbackremotenode->tcp_cntxt.rcv_nxt = | |
2023 | cm_node->tcp_cntxt.loc_seq_num; | |
2024 | cm_node->tcp_cntxt.max_snd_wnd = | |
2025 | loopbackremotenode->tcp_cntxt.rcv_wnd; | |
2026 | loopbackremotenode->tcp_cntxt.max_snd_wnd = | |
2027 | cm_node->tcp_cntxt.rcv_wnd; | |
2028 | cm_node->tcp_cntxt.snd_wnd = | |
2029 | loopbackremotenode->tcp_cntxt.rcv_wnd; | |
2030 | loopbackremotenode->tcp_cntxt.snd_wnd = | |
2031 | cm_node->tcp_cntxt.rcv_wnd; | |
2032 | cm_node->tcp_cntxt.snd_wscale = | |
2033 | loopbackremotenode->tcp_cntxt.rcv_wscale; | |
2034 | loopbackremotenode->tcp_cntxt.snd_wscale = | |
2035 | cm_node->tcp_cntxt.rcv_wscale; | |
9d5ab133 | 2036 | loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD; |
3c2d774c GS |
2037 | create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ); |
2038 | } | |
2039 | return cm_node; | |
2040 | } | |
2041 | ||
2042 | /* set our node side to client (active) side */ | |
2043 | cm_node->tcp_cntxt.client = 1; | |
2044 | /* init our MPA frame ptr */ | |
6492cdf3 FL |
2045 | memcpy(mpa_frame->priv_data, private_data, private_data_len); |
2046 | ||
3c2d774c GS |
2047 | cm_node->mpa_frame_size = mpa_frame_size; |
2048 | ||
2049 | /* send a syn and goto syn sent state */ | |
2050 | cm_node->state = NES_CM_STATE_SYN_SENT; | |
6492cdf3 FL |
2051 | ret = send_syn(cm_node, 0, NULL); |
2052 | ||
2053 | if (ret) { | |
2054 | /* error in sending the syn free up the cm_node struct */ | |
2055 | nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest " | |
2056 | "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n", | |
2057 | cm_node->rem_addr, cm_node->rem_port, cm_node, | |
2058 | cm_node->cm_id); | |
2059 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
2060 | cm_node = NULL; | |
2061 | } | |
3c2d774c | 2062 | |
6492cdf3 FL |
2063 | if (cm_node) |
2064 | nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X," | |
2065 | "port=0x%04x, cm_node=%p, cm_id = %p.\n", | |
2066 | cm_node->rem_addr, cm_node->rem_port, cm_node, | |
2067 | cm_node->cm_id); | |
3c2d774c GS |
2068 | |
2069 | return cm_node; | |
2070 | } | |
2071 | ||
2072 | ||
2073 | /** | |
2074 | * mini_cm_accept - accept a connection | |
2075 | * This function is never called | |
2076 | */ | |
6492cdf3 FL |
2077 | static int mini_cm_accept(struct nes_cm_core *cm_core, |
2078 | struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node) | |
3c2d774c GS |
2079 | { |
2080 | return 0; | |
2081 | } | |
2082 | ||
2083 | ||
2084 | /** | |
2085 | * mini_cm_reject - reject and teardown a connection | |
2086 | */ | |
1a855fbf | 2087 | static int mini_cm_reject(struct nes_cm_core *cm_core, |
6492cdf3 | 2088 | struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node) |
3c2d774c GS |
2089 | { |
2090 | int ret = 0; | |
9d5ab133 | 2091 | int err = 0; |
183ecfa3 | 2092 | int passive_state; |
9d5ab133 FL |
2093 | struct nes_cm_event event; |
2094 | struct iw_cm_id *cm_id = cm_node->cm_id; | |
2095 | struct nes_cm_node *loopback = cm_node->loopbackpartner; | |
3c2d774c | 2096 | |
6492cdf3 FL |
2097 | nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n", |
2098 | __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state); | |
3c2d774c | 2099 | |
6492cdf3 FL |
2100 | if (cm_node->tcp_cntxt.client) |
2101 | return ret; | |
2102 | cleanup_retrans_entry(cm_node); | |
3c2d774c | 2103 | |
9d5ab133 FL |
2104 | if (!loopback) { |
2105 | passive_state = atomic_add_return(1, &cm_node->passive_state); | |
2106 | if (passive_state == NES_SEND_RESET_EVENT) { | |
2107 | cm_node->state = NES_CM_STATE_CLOSED; | |
2108 | rem_ref_cm_node(cm_core, cm_node); | |
2109 | } else { | |
2110 | ret = send_mpa_reject(cm_node); | |
2111 | if (ret) { | |
2112 | cm_node->state = NES_CM_STATE_CLOSED; | |
2113 | err = send_reset(cm_node, NULL); | |
2114 | if (err) | |
2115 | WARN_ON(1); | |
2116 | } else | |
2117 | cm_id->add_ref(cm_id); | |
2118 | } | |
2119 | } else { | |
2120 | cm_node->cm_id = NULL; | |
2121 | event.cm_node = loopback; | |
2122 | event.cm_info.rem_addr = loopback->rem_addr; | |
2123 | event.cm_info.loc_addr = loopback->loc_addr; | |
2124 | event.cm_info.rem_port = loopback->rem_port; | |
2125 | event.cm_info.loc_port = loopback->loc_port; | |
2126 | event.cm_info.cm_id = loopback->cm_id; | |
2127 | cm_event_mpa_reject(&event); | |
183ecfa3 | 2128 | rem_ref_cm_node(cm_core, cm_node); |
9d5ab133 FL |
2129 | loopback->state = NES_CM_STATE_CLOSING; |
2130 | ||
2131 | cm_id = loopback->cm_id; | |
2132 | rem_ref_cm_node(cm_core, loopback); | |
2133 | cm_id->rem_ref(cm_id); | |
2134 | } | |
2135 | ||
3c2d774c GS |
2136 | return ret; |
2137 | } | |
2138 | ||
2139 | ||
2140 | /** | |
2141 | * mini_cm_close | |
2142 | */ | |
1a855fbf | 2143 | static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node) |
3c2d774c GS |
2144 | { |
2145 | int ret = 0; | |
2146 | ||
2147 | if (!cm_core || !cm_node) | |
2148 | return -EINVAL; | |
2149 | ||
2150 | switch (cm_node->state) { | |
6492cdf3 FL |
2151 | case NES_CM_STATE_SYN_RCVD: |
2152 | case NES_CM_STATE_SYN_SENT: | |
2153 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: | |
2154 | case NES_CM_STATE_ESTABLISHED: | |
2155 | case NES_CM_STATE_ACCEPTING: | |
2156 | case NES_CM_STATE_MPAREQ_SENT: | |
2157 | case NES_CM_STATE_MPAREQ_RCVD: | |
2158 | cleanup_retrans_entry(cm_node); | |
2159 | send_reset(cm_node, NULL); | |
2160 | break; | |
2161 | case NES_CM_STATE_CLOSE_WAIT: | |
2162 | cm_node->state = NES_CM_STATE_LAST_ACK; | |
2163 | send_fin(cm_node, NULL); | |
2164 | break; | |
2165 | case NES_CM_STATE_FIN_WAIT1: | |
2166 | case NES_CM_STATE_FIN_WAIT2: | |
2167 | case NES_CM_STATE_LAST_ACK: | |
2168 | case NES_CM_STATE_TIME_WAIT: | |
2169 | case NES_CM_STATE_CLOSING: | |
2170 | ret = -1; | |
2171 | break; | |
9d5ab133 | 2172 | case NES_CM_STATE_MPAREJ_RCVD: |
6492cdf3 FL |
2173 | case NES_CM_STATE_LISTENING: |
2174 | case NES_CM_STATE_UNKNOWN: | |
2175 | case NES_CM_STATE_INITED: | |
2176 | case NES_CM_STATE_CLOSED: | |
2177 | ret = rem_ref_cm_node(cm_core, cm_node); | |
2178 | break; | |
2179 | case NES_CM_STATE_TSA: | |
2180 | if (cm_node->send_entry) | |
2181 | printk(KERN_ERR "ERROR Close got called from STATE_TSA " | |
2182 | "send_entry=%p\n", cm_node->send_entry); | |
2183 | ret = rem_ref_cm_node(cm_core, cm_node); | |
2184 | break; | |
3c2d774c | 2185 | } |
3c2d774c GS |
2186 | return ret; |
2187 | } | |
2188 | ||
2189 | ||
2190 | /** | |
2191 | * recv_pkt - recv an ETHERNET packet, and process it through CM | |
2192 | * node state machine | |
2193 | */ | |
4a14f6a7 | 2194 | static int mini_cm_recv_pkt(struct nes_cm_core *cm_core, |
6492cdf3 | 2195 | struct nes_vnic *nesvnic, struct sk_buff *skb) |
3c2d774c GS |
2196 | { |
2197 | struct nes_cm_node *cm_node = NULL; | |
2198 | struct nes_cm_listener *listener = NULL; | |
2199 | struct iphdr *iph; | |
2200 | struct tcphdr *tcph; | |
2201 | struct nes_cm_info nfo; | |
4a14f6a7 | 2202 | int skb_handled = 1; |
03080e5c | 2203 | __be32 tmp_daddr, tmp_saddr; |
3c2d774c | 2204 | |
6492cdf3 | 2205 | if (!skb) |
4a14f6a7 | 2206 | return 0; |
6492cdf3 | 2207 | if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) { |
4a14f6a7 | 2208 | return 0; |
3c2d774c GS |
2209 | } |
2210 | ||
2211 | iph = (struct iphdr *)skb->data; | |
2212 | tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr)); | |
3c2d774c GS |
2213 | |
2214 | nfo.loc_addr = ntohl(iph->daddr); | |
2215 | nfo.loc_port = ntohs(tcph->dest); | |
2216 | nfo.rem_addr = ntohl(iph->saddr); | |
2217 | nfo.rem_port = ntohs(tcph->source); | |
2218 | ||
03080e5c HH |
2219 | tmp_daddr = cpu_to_be32(iph->daddr); |
2220 | tmp_saddr = cpu_to_be32(iph->saddr); | |
2221 | ||
63779436 | 2222 | nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n", |
03080e5c | 2223 | &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source); |
3c2d774c | 2224 | |
6492cdf3 FL |
2225 | do { |
2226 | cm_node = find_node(cm_core, | |
3c2d774c GS |
2227 | nfo.rem_port, nfo.rem_addr, |
2228 | nfo.loc_port, nfo.loc_addr); | |
2229 | ||
3c2d774c | 2230 | if (!cm_node) { |
6492cdf3 FL |
2231 | /* Only type of packet accepted are for */ |
2232 | /* the PASSIVE open (syn only) */ | |
2233 | if ((!tcph->syn) || (tcph->ack)) { | |
4a14f6a7 | 2234 | skb_handled = 0; |
6492cdf3 FL |
2235 | break; |
2236 | } | |
2237 | listener = find_listener(cm_core, nfo.loc_addr, | |
2238 | nfo.loc_port, | |
2239 | NES_CM_LISTENER_ACTIVE_STATE); | |
4a14f6a7 FL |
2240 | if (!listener) { |
2241 | nfo.cm_id = NULL; | |
2242 | nfo.conn_type = 0; | |
2243 | nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n"); | |
2244 | skb_handled = 0; | |
6492cdf3 FL |
2245 | break; |
2246 | } | |
4a14f6a7 FL |
2247 | nfo.cm_id = listener->cm_id; |
2248 | nfo.conn_type = listener->conn_type; | |
6492cdf3 FL |
2249 | cm_node = make_cm_node(cm_core, nesvnic, &nfo, |
2250 | listener); | |
2251 | if (!cm_node) { | |
2252 | nes_debug(NES_DBG_CM, "Unable to allocate " | |
2253 | "node\n"); | |
2254 | cm_packets_dropped++; | |
3c2d774c | 2255 | atomic_dec(&listener->ref_count); |
6492cdf3 FL |
2256 | dev_kfree_skb_any(skb); |
2257 | break; | |
3c2d774c | 2258 | } |
6492cdf3 FL |
2259 | if (!tcph->rst && !tcph->fin) { |
2260 | cm_node->state = NES_CM_STATE_LISTENING; | |
2261 | } else { | |
2262 | cm_packets_dropped++; | |
2263 | rem_ref_cm_node(cm_core, cm_node); | |
2264 | dev_kfree_skb_any(skb); | |
2265 | break; | |
3c2d774c | 2266 | } |
6492cdf3 FL |
2267 | add_ref_cm_node(cm_node); |
2268 | } else if (cm_node->state == NES_CM_STATE_TSA) { | |
3c2d774c | 2269 | rem_ref_cm_node(cm_core, cm_node); |
6492cdf3 FL |
2270 | atomic_inc(&cm_accel_dropped_pkts); |
2271 | dev_kfree_skb_any(skb); | |
2272 | break; | |
3c2d774c | 2273 | } |
4a14f6a7 FL |
2274 | skb_reset_network_header(skb); |
2275 | skb_set_transport_header(skb, sizeof(*tcph)); | |
2276 | skb->len = ntohs(iph->tot_len); | |
6492cdf3 FL |
2277 | process_packet(cm_node, skb, cm_core); |
2278 | rem_ref_cm_node(cm_core, cm_node); | |
2279 | } while (0); | |
4a14f6a7 | 2280 | return skb_handled; |
3c2d774c GS |
2281 | } |
2282 | ||
2283 | ||
2284 | /** | |
2285 | * nes_cm_alloc_core - allocate a top level instance of a cm core | |
2286 | */ | |
1a855fbf | 2287 | static struct nes_cm_core *nes_cm_alloc_core(void) |
3c2d774c | 2288 | { |
3c2d774c | 2289 | struct nes_cm_core *cm_core; |
3c2d774c GS |
2290 | |
2291 | /* setup the CM core */ | |
2292 | /* alloc top level core control structure */ | |
2293 | cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL); | |
2294 | if (!cm_core) | |
2295 | return NULL; | |
2296 | ||
2297 | INIT_LIST_HEAD(&cm_core->connected_nodes); | |
2298 | init_timer(&cm_core->tcp_timer); | |
2299 | cm_core->tcp_timer.function = nes_cm_timer_tick; | |
2300 | ||
2301 | cm_core->mtu = NES_CM_DEFAULT_MTU; | |
2302 | cm_core->state = NES_CM_STATE_INITED; | |
2303 | cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS; | |
2304 | ||
3c2d774c GS |
2305 | atomic_set(&cm_core->events_posted, 0); |
2306 | ||
3c2d774c GS |
2307 | cm_core->api = &nes_cm_api; |
2308 | ||
2309 | spin_lock_init(&cm_core->ht_lock); | |
2310 | spin_lock_init(&cm_core->listen_list_lock); | |
2311 | ||
2312 | INIT_LIST_HEAD(&cm_core->listen_list.list); | |
2313 | ||
2314 | nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core); | |
2315 | ||
2316 | nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n"); | |
2317 | cm_core->event_wq = create_singlethread_workqueue("nesewq"); | |
2318 | cm_core->post_event = nes_cm_post_event; | |
2319 | nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n"); | |
2320 | cm_core->disconn_wq = create_singlethread_workqueue("nesdwq"); | |
2321 | ||
2322 | print_core(cm_core); | |
2323 | return cm_core; | |
2324 | } | |
2325 | ||
2326 | ||
2327 | /** | |
2328 | * mini_cm_dealloc_core - deallocate a top level instance of a cm core | |
2329 | */ | |
1a855fbf | 2330 | static int mini_cm_dealloc_core(struct nes_cm_core *cm_core) |
3c2d774c GS |
2331 | { |
2332 | nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core); | |
2333 | ||
2334 | if (!cm_core) | |
2335 | return -EINVAL; | |
2336 | ||
2337 | barrier(); | |
2338 | ||
2339 | if (timer_pending(&cm_core->tcp_timer)) { | |
2340 | del_timer(&cm_core->tcp_timer); | |
2341 | } | |
2342 | ||
2343 | destroy_workqueue(cm_core->event_wq); | |
2344 | destroy_workqueue(cm_core->disconn_wq); | |
2345 | nes_debug(NES_DBG_CM, "\n"); | |
2346 | kfree(cm_core); | |
2347 | ||
2348 | return 0; | |
2349 | } | |
2350 | ||
2351 | ||
2352 | /** | |
2353 | * mini_cm_get | |
2354 | */ | |
1a855fbf | 2355 | static int mini_cm_get(struct nes_cm_core *cm_core) |
3c2d774c GS |
2356 | { |
2357 | return cm_core->state; | |
2358 | } | |
2359 | ||
2360 | ||
2361 | /** | |
2362 | * mini_cm_set | |
2363 | */ | |
1a855fbf | 2364 | static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value) |
3c2d774c GS |
2365 | { |
2366 | int ret = 0; | |
2367 | ||
2368 | switch (type) { | |
9d5ab133 FL |
2369 | case NES_CM_SET_PKT_SIZE: |
2370 | cm_core->mtu = value; | |
2371 | break; | |
2372 | case NES_CM_SET_FREE_PKT_Q_SIZE: | |
2373 | cm_core->free_tx_pkt_max = value; | |
2374 | break; | |
2375 | default: | |
2376 | /* unknown set option */ | |
2377 | ret = -EINVAL; | |
3c2d774c GS |
2378 | } |
2379 | ||
2380 | return ret; | |
2381 | } | |
2382 | ||
2383 | ||
2384 | /** | |
2385 | * nes_cm_init_tsa_conn setup HW; MPA frames must be | |
2386 | * successfully exchanged when this is called | |
2387 | */ | |
2388 | static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node) | |
2389 | { | |
2390 | int ret = 0; | |
2391 | ||
2392 | if (!nesqp) | |
2393 | return -EINVAL; | |
2394 | ||
2395 | nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 | | |
2396 | NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG | | |
2397 | NES_QPCONTEXT_MISC_DROS); | |
2398 | ||
2399 | if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale) | |
2400 | nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE); | |
2401 | ||
2402 | nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT); | |
2403 | ||
2404 | nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16); | |
2405 | ||
2406 | nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32( | |
2407 | (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT); | |
2408 | ||
2409 | nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32( | |
2410 | (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) & | |
2411 | NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK); | |
2412 | ||
2413 | nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32( | |
2414 | (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) & | |
2415 | NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK); | |
2416 | ||
2417 | nesqp->nesqp_context->keepalive = cpu_to_le32(0x80); | |
2418 | nesqp->nesqp_context->ts_recent = 0; | |
2419 | nesqp->nesqp_context->ts_age = 0; | |
2420 | nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2421 | nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); | |
2422 | nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); | |
2423 | nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << | |
2424 | cm_node->tcp_cntxt.rcv_wscale); | |
2425 | nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2426 | nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2427 | nesqp->nesqp_context->srtt = 0; | |
2428 | nesqp->nesqp_context->rttvar = cpu_to_le32(0x6); | |
2429 | nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000); | |
2430 | nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss); | |
2431 | nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); | |
2432 | nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2433 | nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); | |
2434 | ||
2435 | nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X," | |
2436 | " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n", | |
2437 | nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt), | |
2438 | le32_to_cpu(nesqp->nesqp_context->snd_nxt), | |
2439 | cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale), | |
2440 | le32_to_cpu(nesqp->nesqp_context->rcv_wnd), | |
2441 | le32_to_cpu(nesqp->nesqp_context->misc)); | |
2442 | nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd)); | |
2443 | nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd)); | |
2444 | nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd)); | |
2445 | ||
2446 | nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n"); | |
2447 | cm_node->state = NES_CM_STATE_TSA; | |
2448 | ||
2449 | return ret; | |
2450 | } | |
2451 | ||
2452 | ||
2453 | /** | |
2454 | * nes_cm_disconn | |
2455 | */ | |
2456 | int nes_cm_disconn(struct nes_qp *nesqp) | |
2457 | { | |
2458 | unsigned long flags; | |
2459 | ||
2460 | spin_lock_irqsave(&nesqp->lock, flags); | |
2461 | if (nesqp->disconn_pending == 0) { | |
2462 | nesqp->disconn_pending++; | |
2463 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
3c2d774c GS |
2464 | /* init our disconnect work element, to */ |
2465 | INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker); | |
2466 | ||
2467 | queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work); | |
6492cdf3 | 2468 | } else |
3c2d774c | 2469 | spin_unlock_irqrestore(&nesqp->lock, flags); |
3c2d774c GS |
2470 | |
2471 | return 0; | |
2472 | } | |
2473 | ||
2474 | ||
2475 | /** | |
2476 | * nes_disconnect_worker | |
2477 | */ | |
1a855fbf | 2478 | static void nes_disconnect_worker(struct work_struct *work) |
3c2d774c GS |
2479 | { |
2480 | struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work); | |
2481 | ||
2482 | nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n", | |
2483 | nesqp->last_aeq, nesqp->hwqp.qp_id); | |
2484 | nes_cm_disconn_true(nesqp); | |
2485 | } | |
2486 | ||
2487 | ||
2488 | /** | |
2489 | * nes_cm_disconn_true | |
2490 | */ | |
1a855fbf | 2491 | static int nes_cm_disconn_true(struct nes_qp *nesqp) |
3c2d774c GS |
2492 | { |
2493 | unsigned long flags; | |
2494 | int ret = 0; | |
2495 | struct iw_cm_id *cm_id; | |
2496 | struct iw_cm_event cm_event; | |
2497 | struct nes_vnic *nesvnic; | |
2498 | u16 last_ae; | |
2499 | u8 original_hw_tcp_state; | |
2500 | u8 original_ibqp_state; | |
2501 | u8 issued_disconnect_reset = 0; | |
2502 | ||
2503 | if (!nesqp) { | |
2504 | nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n"); | |
2505 | return -1; | |
2506 | } | |
2507 | ||
2508 | spin_lock_irqsave(&nesqp->lock, flags); | |
2509 | cm_id = nesqp->cm_id; | |
2510 | /* make sure we havent already closed this connection */ | |
2511 | if (!cm_id) { | |
2512 | nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n", | |
2513 | nesqp->hwqp.qp_id); | |
2514 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
3c2d774c GS |
2515 | return -1; |
2516 | } | |
2517 | ||
2518 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2519 | nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id); | |
2520 | ||
2521 | original_hw_tcp_state = nesqp->hw_tcp_state; | |
2522 | original_ibqp_state = nesqp->ibqp_state; | |
2523 | last_ae = nesqp->last_aeq; | |
2524 | ||
2525 | ||
2526 | nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state); | |
2527 | ||
2528 | if ((nesqp->cm_id) && (cm_id->event_handler)) { | |
2529 | if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) || | |
2530 | ((original_ibqp_state == IB_QPS_RTS) && | |
2531 | (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) { | |
2532 | atomic_inc(&cm_disconnects); | |
2533 | cm_event.event = IW_CM_EVENT_DISCONNECT; | |
2534 | if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) { | |
3c2d774c | 2535 | cm_event.status = IW_CM_EVENT_STATUS_RESET; |
6492cdf3 FL |
2536 | nes_debug(NES_DBG_CM, "Generating a CM " |
2537 | "Disconnect Event (status reset) for " | |
2538 | "QP%u, cm_id = %p. \n", | |
2539 | nesqp->hwqp.qp_id, cm_id); | |
2540 | } else | |
3c2d774c | 2541 | cm_event.status = IW_CM_EVENT_STATUS_OK; |
3c2d774c GS |
2542 | |
2543 | cm_event.local_addr = cm_id->local_addr; | |
2544 | cm_event.remote_addr = cm_id->remote_addr; | |
2545 | cm_event.private_data = NULL; | |
2546 | cm_event.private_data_len = 0; | |
2547 | ||
6492cdf3 FL |
2548 | nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event" |
2549 | " for QP%u, SQ Head = %u, SQ Tail = %u. " | |
2550 | "cm_id = %p, refcount = %u.\n", | |
2551 | nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, | |
2552 | nesqp->hwqp.sq_tail, cm_id, | |
2553 | atomic_read(&nesqp->refcount)); | |
3c2d774c GS |
2554 | |
2555 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2556 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2557 | if (ret) | |
6492cdf3 FL |
2558 | nes_debug(NES_DBG_CM, "OFA CM event_handler " |
2559 | "returned, ret=%d\n", ret); | |
3c2d774c GS |
2560 | spin_lock_irqsave(&nesqp->lock, flags); |
2561 | } | |
2562 | ||
2563 | nesqp->disconn_pending = 0; | |
2564 | /* There might have been another AE while the lock was released */ | |
2565 | original_hw_tcp_state = nesqp->hw_tcp_state; | |
2566 | original_ibqp_state = nesqp->ibqp_state; | |
2567 | last_ae = nesqp->last_aeq; | |
2568 | ||
2569 | if ((issued_disconnect_reset == 0) && (nesqp->cm_id) && | |
2570 | ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) || | |
2571 | (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) || | |
2572 | (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) || | |
2573 | (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) { | |
2574 | atomic_inc(&cm_closes); | |
2575 | nesqp->cm_id = NULL; | |
2576 | nesqp->in_disconnect = 0; | |
2577 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2578 | nes_disconnect(nesqp, 1); | |
2579 | ||
2580 | cm_id->provider_data = nesqp; | |
2581 | /* Send up the close complete event */ | |
2582 | cm_event.event = IW_CM_EVENT_CLOSE; | |
2583 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
2584 | cm_event.provider_data = cm_id->provider_data; | |
2585 | cm_event.local_addr = cm_id->local_addr; | |
2586 | cm_event.remote_addr = cm_id->remote_addr; | |
2587 | cm_event.private_data = NULL; | |
2588 | cm_event.private_data_len = 0; | |
2589 | ||
2590 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2591 | if (ret) { | |
2592 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2593 | } | |
2594 | ||
2595 | cm_id->rem_ref(cm_id); | |
2596 | ||
2597 | spin_lock_irqsave(&nesqp->lock, flags); | |
2598 | if (nesqp->flush_issued == 0) { | |
2599 | nesqp->flush_issued = 1; | |
2600 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
6492cdf3 FL |
2601 | flush_wqes(nesvnic->nesdev, nesqp, |
2602 | NES_CQP_FLUSH_RQ, 1); | |
2603 | } else | |
3c2d774c | 2604 | spin_unlock_irqrestore(&nesqp->lock, flags); |
3c2d774c GS |
2605 | } else { |
2606 | cm_id = nesqp->cm_id; | |
2607 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2608 | /* check to see if the inbound reset beat the outbound reset */ | |
2609 | if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) { | |
6492cdf3 FL |
2610 | nes_debug(NES_DBG_CM, "QP%u: Decing refcount " |
2611 | "due to inbound reset beating the " | |
2612 | "outbound reset.\n", nesqp->hwqp.qp_id); | |
3c2d774c GS |
2613 | } |
2614 | } | |
2615 | } else { | |
2616 | nesqp->disconn_pending = 0; | |
2617 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2618 | } | |
3c2d774c GS |
2619 | |
2620 | return 0; | |
2621 | } | |
2622 | ||
2623 | ||
2624 | /** | |
2625 | * nes_disconnect | |
2626 | */ | |
1a855fbf | 2627 | static int nes_disconnect(struct nes_qp *nesqp, int abrupt) |
3c2d774c GS |
2628 | { |
2629 | int ret = 0; | |
2630 | struct nes_vnic *nesvnic; | |
2631 | struct nes_device *nesdev; | |
c12e56ef | 2632 | struct nes_ib_device *nesibdev; |
3c2d774c GS |
2633 | |
2634 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2635 | if (!nesvnic) | |
2636 | return -EINVAL; | |
2637 | ||
2638 | nesdev = nesvnic->nesdev; | |
c12e56ef | 2639 | nesibdev = nesvnic->nesibdev; |
3c2d774c GS |
2640 | |
2641 | nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", | |
2642 | atomic_read(&nesvnic->netdev->refcnt)); | |
2643 | ||
2644 | if (nesqp->active_conn) { | |
2645 | ||
2646 | /* indicate this connection is NOT active */ | |
2647 | nesqp->active_conn = 0; | |
2648 | } else { | |
2649 | /* Need to free the Last Streaming Mode Message */ | |
2650 | if (nesqp->ietf_frame) { | |
c12e56ef FL |
2651 | if (nesqp->lsmm_mr) |
2652 | nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr); | |
3c2d774c GS |
2653 | pci_free_consistent(nesdev->pcidev, |
2654 | nesqp->private_data_len+sizeof(struct ietf_mpa_frame), | |
2655 | nesqp->ietf_frame, nesqp->ietf_frame_pbase); | |
2656 | } | |
2657 | } | |
2658 | ||
2659 | /* close the CM node down if it is still active */ | |
2660 | if (nesqp->cm_node) { | |
2661 | nes_debug(NES_DBG_CM, "Call close API\n"); | |
2662 | ||
2663 | g_cm_core->api->close(g_cm_core, nesqp->cm_node); | |
3c2d774c GS |
2664 | } |
2665 | ||
2666 | return ret; | |
2667 | } | |
2668 | ||
2669 | ||
2670 | /** | |
2671 | * nes_accept | |
2672 | */ | |
2673 | int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
2674 | { | |
2675 | u64 u64temp; | |
2676 | struct ib_qp *ibqp; | |
2677 | struct nes_qp *nesqp; | |
2678 | struct nes_vnic *nesvnic; | |
2679 | struct nes_device *nesdev; | |
2680 | struct nes_cm_node *cm_node; | |
2681 | struct nes_adapter *adapter; | |
2682 | struct ib_qp_attr attr; | |
2683 | struct iw_cm_event cm_event; | |
2684 | struct nes_hw_qp_wqe *wqe; | |
2685 | struct nes_v4_quad nes_quad; | |
30da7cff | 2686 | u32 crc_value; |
3c2d774c | 2687 | int ret; |
183ecfa3 | 2688 | int passive_state; |
c12e56ef FL |
2689 | struct nes_ib_device *nesibdev; |
2690 | struct ib_mr *ibmr = NULL; | |
2691 | struct ib_phys_buf ibphysbuf; | |
2692 | struct nes_pd *nespd; | |
7a5efb62 | 2693 | u64 tagged_offset; |
c12e56ef FL |
2694 | |
2695 | ||
3c2d774c GS |
2696 | |
2697 | ibqp = nes_get_qp(cm_id->device, conn_param->qpn); | |
2698 | if (!ibqp) | |
2699 | return -EINVAL; | |
2700 | ||
2701 | /* get all our handles */ | |
2702 | nesqp = to_nesqp(ibqp); | |
2703 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2704 | nesdev = nesvnic->nesdev; | |
2705 | adapter = nesdev->nesadapter; | |
2706 | ||
3c2d774c | 2707 | cm_node = (struct nes_cm_node *)cm_id->provider_data; |
6492cdf3 FL |
2708 | nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p," |
2709 | "%s\n", cm_node, nesvnic, nesvnic->netdev, | |
2710 | nesvnic->netdev->name); | |
3c2d774c GS |
2711 | |
2712 | /* associate the node with the QP */ | |
2713 | nesqp->cm_node = (void *)cm_node; | |
6492cdf3 FL |
2714 | cm_node->nesqp = nesqp; |
2715 | nes_add_ref(&nesqp->ibqp); | |
3c2d774c | 2716 | |
6492cdf3 FL |
2717 | nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n", |
2718 | nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener); | |
3c2d774c GS |
2719 | atomic_inc(&cm_accepts); |
2720 | ||
2721 | nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", | |
2722 | atomic_read(&nesvnic->netdev->refcnt)); | |
2723 | ||
6492cdf3 FL |
2724 | /* allocate the ietf frame and space for private data */ |
2725 | nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev, | |
2726 | sizeof(struct ietf_mpa_frame) + conn_param->private_data_len, | |
2727 | &nesqp->ietf_frame_pbase); | |
3c2d774c | 2728 | |
6492cdf3 FL |
2729 | if (!nesqp->ietf_frame) { |
2730 | nes_debug(NES_DBG_CM, "Unable to allocate memory for private " | |
2731 | "data\n"); | |
2732 | return -ENOMEM; | |
2733 | } | |
3c2d774c | 2734 | |
3c2d774c | 2735 | |
6492cdf3 FL |
2736 | /* setup the MPA frame */ |
2737 | nesqp->private_data_len = conn_param->private_data_len; | |
2738 | memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); | |
3c2d774c | 2739 | |
6492cdf3 FL |
2740 | memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data, |
2741 | conn_param->private_data_len); | |
3c2d774c | 2742 | |
6492cdf3 FL |
2743 | nesqp->ietf_frame->priv_data_len = |
2744 | cpu_to_be16(conn_param->private_data_len); | |
2745 | nesqp->ietf_frame->rev = mpa_version; | |
2746 | nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC; | |
3c2d774c | 2747 | |
6492cdf3 FL |
2748 | /* setup our first outgoing iWarp send WQE (the IETF frame response) */ |
2749 | wqe = &nesqp->hwqp.sq_vbase[0]; | |
2750 | ||
2751 | if (cm_id->remote_addr.sin_addr.s_addr != | |
2752 | cm_id->local_addr.sin_addr.s_addr) { | |
2753 | u64temp = (unsigned long)nesqp; | |
c12e56ef FL |
2754 | nesibdev = nesvnic->nesibdev; |
2755 | nespd = nesqp->nespd; | |
2756 | ibphysbuf.addr = nesqp->ietf_frame_pbase; | |
2757 | ibphysbuf.size = conn_param->private_data_len + | |
2758 | sizeof(struct ietf_mpa_frame); | |
7a5efb62 | 2759 | tagged_offset = (u64)(unsigned long)nesqp->ietf_frame; |
c12e56ef FL |
2760 | ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd, |
2761 | &ibphysbuf, 1, | |
2762 | IB_ACCESS_LOCAL_WRITE, | |
7a5efb62 | 2763 | &tagged_offset); |
c12e56ef FL |
2764 | if (!ibmr) { |
2765 | nes_debug(NES_DBG_CM, "Unable to register memory region" | |
2766 | "for lSMM for cm_node = %p \n", | |
2767 | cm_node); | |
2768 | return -ENOMEM; | |
2769 | } | |
2770 | ||
2771 | ibmr->pd = &nespd->ibpd; | |
2772 | ibmr->device = nespd->ibpd.device; | |
2773 | nesqp->lsmm_mr = ibmr; | |
2774 | ||
6492cdf3 FL |
2775 | u64temp |= NES_SW_CONTEXT_ALIGN>>1; |
2776 | set_wqe_64bit_value(wqe->wqe_words, | |
2777 | NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, | |
2778 | u64temp); | |
2779 | wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = | |
2780 | cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING | | |
2781 | NES_IWARP_SQ_WQE_WRPDU); | |
2782 | wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = | |
2783 | cpu_to_le32(conn_param->private_data_len + | |
2784 | sizeof(struct ietf_mpa_frame)); | |
c12e56ef FL |
2785 | set_wqe_64bit_value(wqe->wqe_words, |
2786 | NES_IWARP_SQ_WQE_FRAG0_LOW_IDX, | |
7a5efb62 | 2787 | (u64)(unsigned long)nesqp->ietf_frame); |
6492cdf3 FL |
2788 | wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = |
2789 | cpu_to_le32(conn_param->private_data_len + | |
2790 | sizeof(struct ietf_mpa_frame)); | |
c12e56ef | 2791 | wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey; |
6492cdf3 FL |
2792 | |
2793 | nesqp->nesqp_context->ird_ord_sizes |= | |
2794 | cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | | |
2795 | NES_QPCONTEXT_ORDIRD_WRPDU); | |
2796 | } else { | |
2797 | nesqp->nesqp_context->ird_ord_sizes |= | |
9d5ab133 | 2798 | cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU); |
6492cdf3 FL |
2799 | } |
2800 | nesqp->skip_lsmm = 1; | |
3c2d774c GS |
2801 | |
2802 | ||
2803 | /* Cache the cm_id in the qp */ | |
2804 | nesqp->cm_id = cm_id; | |
2805 | cm_node->cm_id = cm_id; | |
2806 | ||
2807 | /* nesqp->cm_node = (void *)cm_id->provider_data; */ | |
2808 | cm_id->provider_data = nesqp; | |
2809 | nesqp->active_conn = 0; | |
2810 | ||
6492cdf3 FL |
2811 | if (cm_node->state == NES_CM_STATE_TSA) |
2812 | nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n", | |
2813 | cm_node); | |
2814 | ||
3c2d774c GS |
2815 | nes_cm_init_tsa_conn(nesqp, cm_node); |
2816 | ||
6492cdf3 FL |
2817 | nesqp->nesqp_context->tcpPorts[0] = |
2818 | cpu_to_le16(ntohs(cm_id->local_addr.sin_port)); | |
2819 | nesqp->nesqp_context->tcpPorts[1] = | |
2820 | cpu_to_le16(ntohs(cm_id->remote_addr.sin_port)); | |
2821 | ||
2822 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) | |
2823 | nesqp->nesqp_context->ip0 = | |
2824 | cpu_to_le32(ntohl(nesvnic->local_ipaddr)); | |
2825 | else | |
2826 | nesqp->nesqp_context->ip0 = | |
2827 | cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr)); | |
3c2d774c GS |
2828 | |
2829 | nesqp->nesqp_context->misc2 |= cpu_to_le32( | |
6492cdf3 FL |
2830 | (u32)PCI_FUNC(nesdev->pcidev->devfn) << |
2831 | NES_QPCONTEXT_MISC2_SRC_IP_SHIFT); | |
3c2d774c | 2832 | |
6492cdf3 FL |
2833 | nesqp->nesqp_context->arp_index_vlan |= |
2834 | cpu_to_le32(nes_arp_table(nesdev, | |
2835 | le32_to_cpu(nesqp->nesqp_context->ip0), NULL, | |
3c2d774c GS |
2836 | NES_ARP_RESOLVE) << 16); |
2837 | ||
2838 | nesqp->nesqp_context->ts_val_delta = cpu_to_le32( | |
6492cdf3 | 2839 | jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW)); |
3c2d774c GS |
2840 | |
2841 | nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id); | |
2842 | ||
2843 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32( | |
6492cdf3 FL |
2844 | ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT)); |
2845 | nesqp->nesqp_context->ird_ord_sizes |= | |
2846 | cpu_to_le32((u32)conn_param->ord); | |
3c2d774c GS |
2847 | |
2848 | memset(&nes_quad, 0, sizeof(nes_quad)); | |
6492cdf3 FL |
2849 | nes_quad.DstIpAdrIndex = |
2850 | cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); | |
2851 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) | |
2852 | nes_quad.SrcIpadr = nesvnic->local_ipaddr; | |
2853 | else | |
2854 | nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr; | |
2855 | nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port; | |
2856 | nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port; | |
3c2d774c GS |
2857 | |
2858 | /* Produce hash key */ | |
30da7cff FL |
2859 | crc_value = get_crc_value(&nes_quad); |
2860 | nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff); | |
3c2d774c | 2861 | nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n", |
6492cdf3 | 2862 | nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask); |
3c2d774c GS |
2863 | |
2864 | nesqp->hte_index &= adapter->hte_index_mask; | |
2865 | nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); | |
2866 | ||
2867 | cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node); | |
2868 | ||
6492cdf3 FL |
2869 | nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = " |
2870 | "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + " | |
2871 | "private data length=%zu.\n", nesqp->hwqp.qp_id, | |
3c2d774c GS |
2872 | ntohl(cm_id->remote_addr.sin_addr.s_addr), |
2873 | ntohs(cm_id->remote_addr.sin_port), | |
2874 | ntohl(cm_id->local_addr.sin_addr.s_addr), | |
2875 | ntohs(cm_id->local_addr.sin_port), | |
2876 | le32_to_cpu(nesqp->nesqp_context->rcv_nxt), | |
2877 | le32_to_cpu(nesqp->nesqp_context->snd_nxt), | |
6492cdf3 FL |
2878 | conn_param->private_data_len + |
2879 | sizeof(struct ietf_mpa_frame)); | |
3c2d774c | 2880 | |
3c2d774c | 2881 | |
73ac36ea | 2882 | /* notify OF layer that accept event was successful */ |
3c2d774c GS |
2883 | cm_id->add_ref(cm_id); |
2884 | ||
2885 | cm_event.event = IW_CM_EVENT_ESTABLISHED; | |
2886 | cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED; | |
2887 | cm_event.provider_data = (void *)nesqp; | |
2888 | cm_event.local_addr = cm_id->local_addr; | |
2889 | cm_event.remote_addr = cm_id->remote_addr; | |
2890 | cm_event.private_data = NULL; | |
2891 | cm_event.private_data_len = 0; | |
2892 | ret = cm_id->event_handler(cm_id, &cm_event); | |
183ecfa3 FL |
2893 | attr.qp_state = IB_QPS_RTS; |
2894 | nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL); | |
3c2d774c | 2895 | if (cm_node->loopbackpartner) { |
6492cdf3 FL |
2896 | cm_node->loopbackpartner->mpa_frame_size = |
2897 | nesqp->private_data_len; | |
3c2d774c | 2898 | /* copy entire MPA frame to our cm_node's frame */ |
6492cdf3 FL |
2899 | memcpy(cm_node->loopbackpartner->mpa_frame_buf, |
2900 | nesqp->ietf_frame->priv_data, nesqp->private_data_len); | |
3c2d774c GS |
2901 | create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED); |
2902 | } | |
2903 | if (ret) | |
6492cdf3 FL |
2904 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, " |
2905 | "ret=%d\n", __func__, __LINE__, ret); | |
3c2d774c | 2906 | |
183ecfa3 FL |
2907 | passive_state = atomic_add_return(1, &cm_node->passive_state); |
2908 | if (passive_state == NES_SEND_RESET_EVENT) | |
2909 | create_event(cm_node, NES_CM_EVENT_RESET); | |
3c2d774c GS |
2910 | return 0; |
2911 | } | |
2912 | ||
2913 | ||
2914 | /** | |
2915 | * nes_reject | |
2916 | */ | |
2917 | int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) | |
2918 | { | |
2919 | struct nes_cm_node *cm_node; | |
9d5ab133 FL |
2920 | struct nes_cm_node *loopback; |
2921 | ||
3c2d774c GS |
2922 | struct nes_cm_core *cm_core; |
2923 | ||
2924 | atomic_inc(&cm_rejects); | |
2925 | cm_node = (struct nes_cm_node *) cm_id->provider_data; | |
9d5ab133 | 2926 | loopback = cm_node->loopbackpartner; |
3c2d774c | 2927 | cm_core = cm_node->cm_core; |
9d5ab133 | 2928 | cm_node->cm_id = cm_id; |
3c2d774c GS |
2929 | cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len; |
2930 | ||
9d5ab133 FL |
2931 | if (cm_node->mpa_frame_size > MAX_CM_BUFFER) |
2932 | return -EINVAL; | |
2933 | ||
3c2d774c | 2934 | strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP); |
9d5ab133 FL |
2935 | if (loopback) { |
2936 | memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len); | |
2937 | loopback->mpa_frame.priv_data_len = pdata_len; | |
2938 | loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) + | |
2939 | pdata_len; | |
2940 | } else { | |
2941 | memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len); | |
2942 | cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len); | |
2943 | } | |
3c2d774c | 2944 | |
3c2d774c GS |
2945 | cm_node->mpa_frame.rev = mpa_version; |
2946 | cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT; | |
2947 | ||
9d5ab133 | 2948 | return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node); |
3c2d774c GS |
2949 | } |
2950 | ||
2951 | ||
2952 | /** | |
2953 | * nes_connect | |
2954 | * setup and launch cm connect node | |
2955 | */ | |
2956 | int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
2957 | { | |
2958 | struct ib_qp *ibqp; | |
2959 | struct nes_qp *nesqp; | |
2960 | struct nes_vnic *nesvnic; | |
2961 | struct nes_device *nesdev; | |
2962 | struct nes_cm_node *cm_node; | |
2963 | struct nes_cm_info cm_info; | |
2964 | ||
2965 | ibqp = nes_get_qp(cm_id->device, conn_param->qpn); | |
2966 | if (!ibqp) | |
2967 | return -EINVAL; | |
2968 | nesqp = to_nesqp(ibqp); | |
2969 | if (!nesqp) | |
2970 | return -EINVAL; | |
2971 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2972 | if (!nesvnic) | |
2973 | return -EINVAL; | |
2974 | nesdev = nesvnic->nesdev; | |
2975 | if (!nesdev) | |
2976 | return -EINVAL; | |
2977 | ||
6492cdf3 FL |
2978 | nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = " |
2979 | "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id, | |
2980 | ntohl(nesvnic->local_ipaddr), | |
2981 | ntohl(cm_id->remote_addr.sin_addr.s_addr), | |
2982 | ntohs(cm_id->remote_addr.sin_port), | |
2983 | ntohl(cm_id->local_addr.sin_addr.s_addr), | |
2984 | ntohs(cm_id->local_addr.sin_port)); | |
3c2d774c | 2985 | |
6492cdf3 | 2986 | atomic_inc(&cm_connects); |
3c2d774c GS |
2987 | nesqp->active_conn = 1; |
2988 | ||
3c2d774c GS |
2989 | /* cache the cm_id in the qp */ |
2990 | nesqp->cm_id = cm_id; | |
2991 | ||
2992 | cm_id->provider_data = nesqp; | |
2993 | ||
3c2d774c GS |
2994 | nesqp->private_data_len = conn_param->private_data_len; |
2995 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord); | |
2996 | nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord); | |
6492cdf3 FL |
2997 | nes_debug(NES_DBG_CM, "mpa private data len =%u\n", |
2998 | conn_param->private_data_len); | |
3c2d774c | 2999 | |
6492cdf3 FL |
3000 | if (cm_id->local_addr.sin_addr.s_addr != |
3001 | cm_id->remote_addr.sin_addr.s_addr) | |
3c2d774c | 3002 | nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), |
6492cdf3 | 3003 | PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD); |
3c2d774c GS |
3004 | |
3005 | /* set up the connection params for the node */ | |
6492cdf3 FL |
3006 | cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr); |
3007 | cm_info.loc_port = htons(cm_id->local_addr.sin_port); | |
3008 | cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr); | |
3009 | cm_info.rem_port = htons(cm_id->remote_addr.sin_port); | |
3c2d774c GS |
3010 | cm_info.cm_id = cm_id; |
3011 | cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; | |
3012 | ||
3013 | cm_id->add_ref(cm_id); | |
3c2d774c GS |
3014 | |
3015 | /* create a connect CM node connection */ | |
6492cdf3 FL |
3016 | cm_node = g_cm_core->api->connect(g_cm_core, nesvnic, |
3017 | conn_param->private_data_len, (void *)conn_param->private_data, | |
3018 | &cm_info); | |
3c2d774c | 3019 | if (!cm_node) { |
6492cdf3 FL |
3020 | if (cm_id->local_addr.sin_addr.s_addr != |
3021 | cm_id->remote_addr.sin_addr.s_addr) | |
3c2d774c | 3022 | nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), |
6492cdf3 FL |
3023 | PCI_FUNC(nesdev->pcidev->devfn), |
3024 | NES_MANAGE_APBVT_DEL); | |
3025 | ||
3c2d774c GS |
3026 | cm_id->rem_ref(cm_id); |
3027 | return -ENOMEM; | |
3028 | } | |
3029 | ||
3030 | cm_node->apbvt_set = 1; | |
3031 | nesqp->cm_node = cm_node; | |
6492cdf3 | 3032 | cm_node->nesqp = nesqp; |
d7ffd507 | 3033 | nes_add_ref(&nesqp->ibqp); |
3c2d774c GS |
3034 | |
3035 | return 0; | |
3036 | } | |
3037 | ||
3038 | ||
3039 | /** | |
3040 | * nes_create_listen | |
3041 | */ | |
3042 | int nes_create_listen(struct iw_cm_id *cm_id, int backlog) | |
3043 | { | |
3044 | struct nes_vnic *nesvnic; | |
3045 | struct nes_cm_listener *cm_node; | |
3046 | struct nes_cm_info cm_info; | |
3047 | struct nes_adapter *adapter; | |
3048 | int err; | |
3049 | ||
3050 | ||
3051 | nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n", | |
3052 | cm_id, ntohs(cm_id->local_addr.sin_port)); | |
3053 | ||
3054 | nesvnic = to_nesvnic(cm_id->device); | |
3055 | if (!nesvnic) | |
3056 | return -EINVAL; | |
3057 | adapter = nesvnic->nesdev->nesadapter; | |
3058 | nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n", | |
3059 | nesvnic, nesvnic->netdev, nesvnic->netdev->name); | |
3060 | ||
3061 | nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n", | |
3062 | nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr); | |
3063 | ||
3064 | /* setup listen params in our api call struct */ | |
3065 | cm_info.loc_addr = nesvnic->local_ipaddr; | |
3066 | cm_info.loc_port = cm_id->local_addr.sin_port; | |
3067 | cm_info.backlog = backlog; | |
3068 | cm_info.cm_id = cm_id; | |
3069 | ||
3070 | cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; | |
3071 | ||
3072 | ||
3073 | cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info); | |
3074 | if (!cm_node) { | |
6492cdf3 | 3075 | printk(KERN_ERR "%s[%u] Error returned from listen API call\n", |
33718363 | 3076 | __func__, __LINE__); |
3c2d774c GS |
3077 | return -ENOMEM; |
3078 | } | |
3079 | ||
3080 | cm_id->provider_data = cm_node; | |
3081 | ||
3082 | if (!cm_node->reused_node) { | |
6492cdf3 FL |
3083 | err = nes_manage_apbvt(nesvnic, |
3084 | ntohs(cm_id->local_addr.sin_port), | |
3085 | PCI_FUNC(nesvnic->nesdev->pcidev->devfn), | |
3086 | NES_MANAGE_APBVT_ADD); | |
3c2d774c | 3087 | if (err) { |
6492cdf3 FL |
3088 | printk(KERN_ERR "nes_manage_apbvt call returned %d.\n", |
3089 | err); | |
3c2d774c GS |
3090 | g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node); |
3091 | return err; | |
3092 | } | |
3093 | cm_listens_created++; | |
3094 | } | |
3095 | ||
3096 | cm_id->add_ref(cm_id); | |
3097 | cm_id->provider_data = (void *)cm_node; | |
3098 | ||
3099 | ||
3100 | return 0; | |
3101 | } | |
3102 | ||
3103 | ||
3104 | /** | |
3105 | * nes_destroy_listen | |
3106 | */ | |
3107 | int nes_destroy_listen(struct iw_cm_id *cm_id) | |
3108 | { | |
3109 | if (cm_id->provider_data) | |
3110 | g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data); | |
3111 | else | |
3112 | nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n"); | |
3113 | ||
3114 | cm_id->rem_ref(cm_id); | |
3115 | ||
3116 | return 0; | |
3117 | } | |
3118 | ||
3119 | ||
3120 | /** | |
3121 | * nes_cm_recv | |
3122 | */ | |
3123 | int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice) | |
3124 | { | |
4a14f6a7 | 3125 | int rc = 0; |
3c2d774c GS |
3126 | cm_packets_received++; |
3127 | if ((g_cm_core) && (g_cm_core->api)) { | |
4a14f6a7 | 3128 | rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb); |
3c2d774c GS |
3129 | } else { |
3130 | nes_debug(NES_DBG_CM, "Unable to process packet for CM," | |
3131 | " cm is not setup properly.\n"); | |
3132 | } | |
3133 | ||
4a14f6a7 | 3134 | return rc; |
3c2d774c GS |
3135 | } |
3136 | ||
3137 | ||
3138 | /** | |
3139 | * nes_cm_start | |
3140 | * Start and init a cm core module | |
3141 | */ | |
3142 | int nes_cm_start(void) | |
3143 | { | |
3144 | nes_debug(NES_DBG_CM, "\n"); | |
3145 | /* create the primary CM core, pass this handle to subsequent core inits */ | |
3146 | g_cm_core = nes_cm_alloc_core(); | |
3147 | if (g_cm_core) { | |
3148 | return 0; | |
3149 | } else { | |
3150 | return -ENOMEM; | |
3151 | } | |
3152 | } | |
3153 | ||
3154 | ||
3155 | /** | |
3156 | * nes_cm_stop | |
3157 | * stop and dealloc all cm core instances | |
3158 | */ | |
3159 | int nes_cm_stop(void) | |
3160 | { | |
3161 | g_cm_core->api->destroy_cm_core(g_cm_core); | |
3162 | return 0; | |
3163 | } | |
3164 | ||
3165 | ||
3166 | /** | |
3167 | * cm_event_connected | |
3168 | * handle a connected event, setup QPs and HW | |
3169 | */ | |
1a855fbf | 3170 | static void cm_event_connected(struct nes_cm_event *event) |
3c2d774c GS |
3171 | { |
3172 | u64 u64temp; | |
3173 | struct nes_qp *nesqp; | |
3174 | struct nes_vnic *nesvnic; | |
3175 | struct nes_device *nesdev; | |
3176 | struct nes_cm_node *cm_node; | |
3177 | struct nes_adapter *nesadapter; | |
3178 | struct ib_qp_attr attr; | |
3179 | struct iw_cm_id *cm_id; | |
3180 | struct iw_cm_event cm_event; | |
3181 | struct nes_hw_qp_wqe *wqe; | |
3182 | struct nes_v4_quad nes_quad; | |
30da7cff | 3183 | u32 crc_value; |
3c2d774c GS |
3184 | int ret; |
3185 | ||
3186 | /* get all our handles */ | |
3187 | cm_node = event->cm_node; | |
3188 | cm_id = cm_node->cm_id; | |
3189 | nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id); | |
3190 | nesqp = (struct nes_qp *)cm_id->provider_data; | |
3191 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
3192 | nesdev = nesvnic->nesdev; | |
3193 | nesadapter = nesdev->nesadapter; | |
3194 | ||
3195 | if (nesqp->destroyed) { | |
3196 | return; | |
3197 | } | |
3198 | atomic_inc(&cm_connecteds); | |
3199 | nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on" | |
3200 | " local port 0x%04X. jiffies = %lu.\n", | |
3201 | nesqp->hwqp.qp_id, | |
3202 | ntohl(cm_id->remote_addr.sin_addr.s_addr), | |
3203 | ntohs(cm_id->remote_addr.sin_port), | |
3204 | ntohs(cm_id->local_addr.sin_port), | |
3205 | jiffies); | |
3206 | ||
3207 | nes_cm_init_tsa_conn(nesqp, cm_node); | |
3208 | ||
3209 | /* set the QP tsa context */ | |
6492cdf3 FL |
3210 | nesqp->nesqp_context->tcpPorts[0] = |
3211 | cpu_to_le16(ntohs(cm_id->local_addr.sin_port)); | |
3212 | nesqp->nesqp_context->tcpPorts[1] = | |
3213 | cpu_to_le16(ntohs(cm_id->remote_addr.sin_port)); | |
3214 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) | |
3215 | nesqp->nesqp_context->ip0 = | |
3216 | cpu_to_le32(ntohl(nesvnic->local_ipaddr)); | |
3217 | else | |
3218 | nesqp->nesqp_context->ip0 = | |
3219 | cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr)); | |
3c2d774c GS |
3220 | |
3221 | nesqp->nesqp_context->misc2 |= cpu_to_le32( | |
6492cdf3 FL |
3222 | (u32)PCI_FUNC(nesdev->pcidev->devfn) << |
3223 | NES_QPCONTEXT_MISC2_SRC_IP_SHIFT); | |
3c2d774c | 3224 | nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32( |
6492cdf3 FL |
3225 | nes_arp_table(nesdev, |
3226 | le32_to_cpu(nesqp->nesqp_context->ip0), | |
3c2d774c GS |
3227 | NULL, NES_ARP_RESOLVE) << 16); |
3228 | nesqp->nesqp_context->ts_val_delta = cpu_to_le32( | |
3229 | jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW)); | |
3230 | nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id); | |
3231 | nesqp->nesqp_context->ird_ord_sizes |= | |
6492cdf3 FL |
3232 | cpu_to_le32((u32)1 << |
3233 | NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT); | |
3c2d774c GS |
3234 | |
3235 | /* Adjust tail for not having a LSMM */ | |
3236 | nesqp->hwqp.sq_tail = 1; | |
3237 | ||
3238 | #if defined(NES_SEND_FIRST_WRITE) | |
6492cdf3 FL |
3239 | if (cm_node->send_write0) { |
3240 | nes_debug(NES_DBG_CM, "Sending first write.\n"); | |
3241 | wqe = &nesqp->hwqp.sq_vbase[0]; | |
3242 | u64temp = (unsigned long)nesqp; | |
3243 | u64temp |= NES_SW_CONTEXT_ALIGN>>1; | |
3244 | set_wqe_64bit_value(wqe->wqe_words, | |
3245 | NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp); | |
3246 | wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = | |
3247 | cpu_to_le32(NES_IWARP_SQ_OP_RDMAW); | |
3248 | wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0; | |
3249 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0; | |
3250 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0; | |
3251 | wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0; | |
3252 | wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0; | |
3253 | ||
3254 | /* use the reserved spot on the WQ for the extra first WQE */ | |
3255 | nesqp->nesqp_context->ird_ord_sizes &= | |
3256 | cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | | |
3257 | NES_QPCONTEXT_ORDIRD_WRPDU | | |
3258 | NES_QPCONTEXT_ORDIRD_ALSMM)); | |
3259 | nesqp->skip_lsmm = 1; | |
3260 | nesqp->hwqp.sq_tail = 0; | |
3261 | nes_write32(nesdev->regs + NES_WQE_ALLOC, | |
3262 | (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id); | |
3263 | } | |
3c2d774c GS |
3264 | #endif |
3265 | ||
3266 | memset(&nes_quad, 0, sizeof(nes_quad)); | |
3267 | ||
6492cdf3 FL |
3268 | nes_quad.DstIpAdrIndex = |
3269 | cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); | |
3270 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) | |
3271 | nes_quad.SrcIpadr = nesvnic->local_ipaddr; | |
3272 | else | |
3273 | nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr; | |
3c2d774c GS |
3274 | nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port; |
3275 | nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port; | |
3276 | ||
3277 | /* Produce hash key */ | |
30da7cff FL |
3278 | crc_value = get_crc_value(&nes_quad); |
3279 | nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff); | |
3c2d774c GS |
3280 | nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n", |
3281 | nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask); | |
3282 | ||
3283 | nesqp->hte_index &= nesadapter->hte_index_mask; | |
3284 | nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); | |
3285 | ||
3286 | nesqp->ietf_frame = &cm_node->mpa_frame; | |
3287 | nesqp->private_data_len = (u8) cm_node->mpa_frame_size; | |
3288 | cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node); | |
3289 | ||
3c2d774c GS |
3290 | /* notify OF layer we successfully created the requested connection */ |
3291 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; | |
3292 | cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED; | |
3293 | cm_event.provider_data = cm_id->provider_data; | |
3294 | cm_event.local_addr.sin_family = AF_INET; | |
3295 | cm_event.local_addr.sin_port = cm_id->local_addr.sin_port; | |
3296 | cm_event.remote_addr = cm_id->remote_addr; | |
3297 | ||
6492cdf3 FL |
3298 | cm_event.private_data = (void *)event->cm_node->mpa_frame_buf; |
3299 | cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size; | |
3c2d774c GS |
3300 | |
3301 | cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr; | |
3302 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3303 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
3304 | ||
3305 | if (ret) | |
6492cdf3 FL |
3306 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, " |
3307 | "ret=%d\n", __func__, __LINE__, ret); | |
3308 | attr.qp_state = IB_QPS_RTS; | |
3309 | nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL); | |
3c2d774c | 3310 | |
6492cdf3 FL |
3311 | nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = " |
3312 | "%lu\n", nesqp->hwqp.qp_id, jiffies); | |
3c2d774c GS |
3313 | |
3314 | return; | |
3315 | } | |
3316 | ||
3317 | ||
3318 | /** | |
3319 | * cm_event_connect_error | |
3320 | */ | |
1a855fbf | 3321 | static void cm_event_connect_error(struct nes_cm_event *event) |
3c2d774c GS |
3322 | { |
3323 | struct nes_qp *nesqp; | |
3324 | struct iw_cm_id *cm_id; | |
3325 | struct iw_cm_event cm_event; | |
3326 | /* struct nes_cm_info cm_info; */ | |
3327 | int ret; | |
3328 | ||
3329 | if (!event->cm_node) | |
3330 | return; | |
3331 | ||
3332 | cm_id = event->cm_node->cm_id; | |
3333 | if (!cm_id) { | |
3334 | return; | |
3335 | } | |
3336 | ||
3337 | nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id); | |
3338 | nesqp = cm_id->provider_data; | |
3339 | ||
3340 | if (!nesqp) { | |
3341 | return; | |
3342 | } | |
3343 | ||
3344 | /* notify OF layer about this connection error event */ | |
3345 | /* cm_id->rem_ref(cm_id); */ | |
3346 | nesqp->cm_id = NULL; | |
3347 | cm_id->provider_data = NULL; | |
3348 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; | |
3349 | cm_event.status = IW_CM_EVENT_STATUS_REJECTED; | |
3350 | cm_event.provider_data = cm_id->provider_data; | |
3351 | cm_event.local_addr = cm_id->local_addr; | |
3352 | cm_event.remote_addr = cm_id->remote_addr; | |
3353 | cm_event.private_data = NULL; | |
3354 | cm_event.private_data_len = 0; | |
3355 | ||
6492cdf3 FL |
3356 | nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, " |
3357 | "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr, | |
3358 | cm_event.remote_addr.sin_addr.s_addr); | |
3c2d774c GS |
3359 | |
3360 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3361 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
3362 | if (ret) | |
6492cdf3 FL |
3363 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, " |
3364 | "ret=%d\n", __func__, __LINE__, ret); | |
6492cdf3 | 3365 | cm_id->rem_ref(cm_id); |
3c2d774c | 3366 | |
6492cdf3 | 3367 | rem_ref_cm_node(event->cm_node->cm_core, event->cm_node); |
3c2d774c GS |
3368 | return; |
3369 | } | |
3370 | ||
3371 | ||
3372 | /** | |
3373 | * cm_event_reset | |
3374 | */ | |
1a855fbf | 3375 | static void cm_event_reset(struct nes_cm_event *event) |
3c2d774c GS |
3376 | { |
3377 | struct nes_qp *nesqp; | |
3378 | struct iw_cm_id *cm_id; | |
3379 | struct iw_cm_event cm_event; | |
3380 | /* struct nes_cm_info cm_info; */ | |
3381 | int ret; | |
3382 | ||
3383 | if (!event->cm_node) | |
3384 | return; | |
3385 | ||
3386 | if (!event->cm_node->cm_id) | |
3387 | return; | |
3388 | ||
3389 | cm_id = event->cm_node->cm_id; | |
3390 | ||
3391 | nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id); | |
3392 | nesqp = cm_id->provider_data; | |
3393 | ||
3394 | nesqp->cm_id = NULL; | |
3395 | /* cm_id->provider_data = NULL; */ | |
3396 | cm_event.event = IW_CM_EVENT_DISCONNECT; | |
3397 | cm_event.status = IW_CM_EVENT_STATUS_RESET; | |
3398 | cm_event.provider_data = cm_id->provider_data; | |
3399 | cm_event.local_addr = cm_id->local_addr; | |
3400 | cm_event.remote_addr = cm_id->remote_addr; | |
3401 | cm_event.private_data = NULL; | |
3402 | cm_event.private_data_len = 0; | |
3403 | ||
3404 | ret = cm_id->event_handler(cm_id, &cm_event); | |
183ecfa3 FL |
3405 | cm_id->add_ref(cm_id); |
3406 | atomic_inc(&cm_closes); | |
3407 | cm_event.event = IW_CM_EVENT_CLOSE; | |
3408 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
3409 | cm_event.provider_data = cm_id->provider_data; | |
3410 | cm_event.local_addr = cm_id->local_addr; | |
3411 | cm_event.remote_addr = cm_id->remote_addr; | |
3412 | cm_event.private_data = NULL; | |
3413 | cm_event.private_data_len = 0; | |
3414 | nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node); | |
3415 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3416 | ||
3c2d774c GS |
3417 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); |
3418 | ||
3419 | ||
3420 | /* notify OF layer about this connection error event */ | |
3421 | cm_id->rem_ref(cm_id); | |
3422 | ||
3423 | return; | |
3424 | } | |
3425 | ||
3426 | ||
3427 | /** | |
3428 | * cm_event_mpa_req | |
3429 | */ | |
1a855fbf | 3430 | static void cm_event_mpa_req(struct nes_cm_event *event) |
3c2d774c GS |
3431 | { |
3432 | struct iw_cm_id *cm_id; | |
3433 | struct iw_cm_event cm_event; | |
3434 | int ret; | |
3435 | struct nes_cm_node *cm_node; | |
3436 | ||
3437 | cm_node = event->cm_node; | |
3438 | if (!cm_node) | |
3439 | return; | |
3440 | cm_id = cm_node->cm_id; | |
3441 | ||
3442 | atomic_inc(&cm_connect_reqs); | |
3443 | nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n", | |
3444 | cm_node, cm_id, jiffies); | |
3445 | ||
3446 | cm_event.event = IW_CM_EVENT_CONNECT_REQUEST; | |
3447 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
3448 | cm_event.provider_data = (void *)cm_node; | |
3449 | ||
3450 | cm_event.local_addr.sin_family = AF_INET; | |
3451 | cm_event.local_addr.sin_port = htons(event->cm_info.loc_port); | |
3452 | cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr); | |
3453 | ||
9d5ab133 FL |
3454 | cm_event.remote_addr.sin_family = AF_INET; |
3455 | cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port); | |
3456 | cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr); | |
3457 | cm_event.private_data = cm_node->mpa_frame_buf; | |
3458 | cm_event.private_data_len = (u8) cm_node->mpa_frame_size; | |
3459 | ||
3460 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3461 | if (ret) | |
3462 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n", | |
3463 | __func__, __LINE__, ret); | |
3464 | return; | |
3465 | } | |
3466 | ||
3467 | ||
3468 | static void cm_event_mpa_reject(struct nes_cm_event *event) | |
3469 | { | |
3470 | struct iw_cm_id *cm_id; | |
3471 | struct iw_cm_event cm_event; | |
3472 | struct nes_cm_node *cm_node; | |
3473 | int ret; | |
3474 | ||
3475 | cm_node = event->cm_node; | |
3476 | if (!cm_node) | |
3477 | return; | |
3478 | cm_id = cm_node->cm_id; | |
3479 | ||
3480 | atomic_inc(&cm_connect_reqs); | |
3481 | nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n", | |
3482 | cm_node, cm_id, jiffies); | |
3483 | ||
3484 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; | |
3485 | cm_event.status = -ECONNREFUSED; | |
3486 | cm_event.provider_data = cm_id->provider_data; | |
3487 | ||
3488 | cm_event.local_addr.sin_family = AF_INET; | |
3489 | cm_event.local_addr.sin_port = htons(event->cm_info.loc_port); | |
3490 | cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr); | |
3491 | ||
3c2d774c GS |
3492 | cm_event.remote_addr.sin_family = AF_INET; |
3493 | cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port); | |
3494 | cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr); | |
3495 | ||
9d5ab133 FL |
3496 | cm_event.private_data = cm_node->mpa_frame_buf; |
3497 | cm_event.private_data_len = (u8) cm_node->mpa_frame_size; | |
3498 | ||
3499 | nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, " | |
3500 | "remove_addr=%08x\n", | |
3501 | cm_event.local_addr.sin_addr.s_addr, | |
3502 | cm_event.remote_addr.sin_addr.s_addr); | |
3c2d774c GS |
3503 | |
3504 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3505 | if (ret) | |
9d5ab133 | 3506 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n", |
33718363 | 3507 | __func__, __LINE__, ret); |
3c2d774c GS |
3508 | |
3509 | return; | |
3510 | } | |
3511 | ||
3512 | ||
3513 | static void nes_cm_event_handler(struct work_struct *); | |
3514 | ||
3515 | /** | |
3516 | * nes_cm_post_event | |
3517 | * post an event to the cm event handler | |
3518 | */ | |
1a855fbf | 3519 | static int nes_cm_post_event(struct nes_cm_event *event) |
3c2d774c GS |
3520 | { |
3521 | atomic_inc(&event->cm_node->cm_core->events_posted); | |
3522 | add_ref_cm_node(event->cm_node); | |
3523 | event->cm_info.cm_id->add_ref(event->cm_info.cm_id); | |
3524 | INIT_WORK(&event->event_work, nes_cm_event_handler); | |
6492cdf3 FL |
3525 | nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n", |
3526 | event->cm_node, event); | |
3c2d774c GS |
3527 | |
3528 | queue_work(event->cm_node->cm_core->event_wq, &event->event_work); | |
3529 | ||
3530 | nes_debug(NES_DBG_CM, "Exit\n"); | |
3531 | return 0; | |
3532 | } | |
3533 | ||
3534 | ||
3535 | /** | |
3536 | * nes_cm_event_handler | |
3537 | * worker function to handle cm events | |
3538 | * will free instance of nes_cm_event | |
3539 | */ | |
3540 | static void nes_cm_event_handler(struct work_struct *work) | |
3541 | { | |
6492cdf3 FL |
3542 | struct nes_cm_event *event = container_of(work, struct nes_cm_event, |
3543 | event_work); | |
3c2d774c GS |
3544 | struct nes_cm_core *cm_core; |
3545 | ||
6492cdf3 | 3546 | if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core)) |
3c2d774c | 3547 | return; |
6492cdf3 | 3548 | |
3c2d774c GS |
3549 | cm_core = event->cm_node->cm_core; |
3550 | nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n", | |
6492cdf3 | 3551 | event, event->type, atomic_read(&cm_core->events_posted)); |
3c2d774c GS |
3552 | |
3553 | switch (event->type) { | |
6492cdf3 FL |
3554 | case NES_CM_EVENT_MPA_REQ: |
3555 | cm_event_mpa_req(event); | |
3556 | nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n", | |
3557 | event->cm_node); | |
3558 | break; | |
3559 | case NES_CM_EVENT_RESET: | |
3560 | nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n", | |
3561 | event->cm_node); | |
3562 | cm_event_reset(event); | |
3563 | break; | |
3564 | case NES_CM_EVENT_CONNECTED: | |
3565 | if ((!event->cm_node->cm_id) || | |
3566 | (event->cm_node->state != NES_CM_STATE_TSA)) | |
3c2d774c | 3567 | break; |
6492cdf3 FL |
3568 | cm_event_connected(event); |
3569 | nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n"); | |
3570 | break; | |
9d5ab133 FL |
3571 | case NES_CM_EVENT_MPA_REJECT: |
3572 | if ((!event->cm_node->cm_id) || | |
3573 | (event->cm_node->state == NES_CM_STATE_TSA)) | |
3574 | break; | |
3575 | cm_event_mpa_reject(event); | |
3576 | nes_debug(NES_DBG_CM, "CM Event: REJECT\n"); | |
3577 | break; | |
3578 | ||
6492cdf3 FL |
3579 | case NES_CM_EVENT_ABORTED: |
3580 | if ((!event->cm_node->cm_id) || | |
3581 | (event->cm_node->state == NES_CM_STATE_TSA)) | |
3c2d774c | 3582 | break; |
6492cdf3 FL |
3583 | cm_event_connect_error(event); |
3584 | nes_debug(NES_DBG_CM, "CM Event: ABORTED\n"); | |
3585 | break; | |
3586 | case NES_CM_EVENT_DROPPED_PKT: | |
3587 | nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n"); | |
3588 | break; | |
3589 | default: | |
3590 | nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n"); | |
3591 | break; | |
3c2d774c GS |
3592 | } |
3593 | ||
3594 | atomic_dec(&cm_core->events_posted); | |
3595 | event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); | |
3596 | rem_ref_cm_node(cm_core, event->cm_node); | |
3597 | kfree(event); | |
3598 | ||
3599 | return; | |
3600 | } |