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3c2d774c GS |
1 | /* |
2 | * Copyright (c) 2006 - 2008 NetEffect, Inc. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | * | |
32 | */ | |
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 *); | |
106 | static int send_syn(struct nes_cm_node *, u32, struct sk_buff *); | |
107 | static int send_reset(struct nes_cm_node *, struct sk_buff *); | |
108 | static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb); | |
1a855fbf | 109 | static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb); |
6492cdf3 FL |
110 | static void process_packet(struct nes_cm_node *, struct sk_buff *, |
111 | struct nes_cm_core *); | |
112 | ||
113 | static void active_open_err(struct nes_cm_node *, struct sk_buff *, int); | |
114 | static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int); | |
115 | static void cleanup_retrans_entry(struct nes_cm_node *); | |
116 | static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *, | |
117 | enum nes_cm_event_type); | |
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 *); | |
127 | ||
128 | static void print_core(struct nes_cm_core *core); | |
3c2d774c GS |
129 | |
130 | /* External CM API Interface */ | |
131 | /* instance of function pointers for client API */ | |
132 | /* set address of this instance to cm_core->cm_ops at cm_core alloc */ | |
133 | static struct nes_cm_ops nes_cm_api = { | |
134 | mini_cm_accelerated, | |
135 | mini_cm_listen, | |
136 | mini_cm_del_listen, | |
137 | mini_cm_connect, | |
138 | mini_cm_close, | |
139 | mini_cm_accept, | |
140 | mini_cm_reject, | |
141 | mini_cm_recv_pkt, | |
142 | mini_cm_dealloc_core, | |
143 | mini_cm_get, | |
144 | mini_cm_set | |
145 | }; | |
146 | ||
1a855fbf | 147 | static struct nes_cm_core *g_cm_core; |
3c2d774c GS |
148 | |
149 | atomic_t cm_connects; | |
150 | atomic_t cm_accepts; | |
151 | atomic_t cm_disconnects; | |
152 | atomic_t cm_closes; | |
153 | atomic_t cm_connecteds; | |
154 | atomic_t cm_connect_reqs; | |
155 | atomic_t cm_rejects; | |
156 | ||
157 | ||
158 | /** | |
159 | * create_event | |
160 | */ | |
161 | static struct nes_cm_event *create_event(struct nes_cm_node *cm_node, | |
162 | enum nes_cm_event_type type) | |
163 | { | |
164 | struct nes_cm_event *event; | |
165 | ||
166 | if (!cm_node->cm_id) | |
167 | return NULL; | |
168 | ||
169 | /* allocate an empty event */ | |
170 | event = kzalloc(sizeof(*event), GFP_ATOMIC); | |
171 | ||
172 | if (!event) | |
173 | return NULL; | |
174 | ||
175 | event->type = type; | |
176 | event->cm_node = cm_node; | |
177 | event->cm_info.rem_addr = cm_node->rem_addr; | |
178 | event->cm_info.loc_addr = cm_node->loc_addr; | |
179 | event->cm_info.rem_port = cm_node->rem_port; | |
180 | event->cm_info.loc_port = cm_node->loc_port; | |
181 | event->cm_info.cm_id = cm_node->cm_id; | |
182 | ||
6492cdf3 FL |
183 | nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, " |
184 | "dst_addr=%08x[%x], src_addr=%08x[%x]\n", | |
185 | cm_node, event, type, event->cm_info.loc_addr, | |
186 | event->cm_info.loc_port, event->cm_info.rem_addr, | |
187 | event->cm_info.rem_port); | |
3c2d774c GS |
188 | |
189 | nes_cm_post_event(event); | |
190 | return event; | |
191 | } | |
192 | ||
193 | ||
194 | /** | |
195 | * send_mpa_request | |
196 | */ | |
6492cdf3 | 197 | static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb) |
3c2d774c | 198 | { |
3c2d774c | 199 | int ret; |
3c2d774c | 200 | if (!skb) { |
6492cdf3 | 201 | nes_debug(NES_DBG_CM, "skb set to NULL\n"); |
3c2d774c GS |
202 | return -1; |
203 | } | |
204 | ||
205 | /* send an MPA Request frame */ | |
206 | form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame, | |
207 | cm_node->mpa_frame_size, SET_ACK); | |
208 | ||
209 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
6492cdf3 | 210 | if (ret < 0) |
3c2d774c | 211 | return ret; |
3c2d774c GS |
212 | |
213 | return 0; | |
214 | } | |
215 | ||
216 | ||
217 | /** | |
218 | * recv_mpa - process a received TCP pkt, we are expecting an | |
219 | * IETF MPA frame | |
220 | */ | |
221 | static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len) | |
222 | { | |
223 | struct ietf_mpa_frame *mpa_frame; | |
224 | ||
225 | /* assume req frame is in tcp data payload */ | |
226 | if (len < sizeof(struct ietf_mpa_frame)) { | |
227 | nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len); | |
228 | return -1; | |
229 | } | |
230 | ||
231 | mpa_frame = (struct ietf_mpa_frame *)buffer; | |
232 | cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len); | |
233 | ||
234 | if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) { | |
235 | nes_debug(NES_DBG_CM, "The received ietf buffer was not right" | |
236 | " complete (%x + %x != %x)\n", | |
237 | cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len); | |
238 | return -1; | |
239 | } | |
240 | ||
241 | /* copy entire MPA frame to our cm_node's frame */ | |
242 | memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame), | |
243 | cm_node->mpa_frame_size); | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | ||
3c2d774c GS |
249 | /** |
250 | * form_cm_frame - get a free packet and build empty frame Use | |
251 | * node info to build. | |
252 | */ | |
6098d107 | 253 | static void form_cm_frame(struct sk_buff *skb, |
6492cdf3 FL |
254 | struct nes_cm_node *cm_node, void *options, u32 optionsize, |
255 | void *data, u32 datasize, u8 flags) | |
3c2d774c GS |
256 | { |
257 | struct tcphdr *tcph; | |
258 | struct iphdr *iph; | |
259 | struct ethhdr *ethh; | |
260 | u8 *buf; | |
261 | u16 packetsize = sizeof(*iph); | |
262 | ||
263 | packetsize += sizeof(*tcph); | |
264 | packetsize += optionsize + datasize; | |
265 | ||
266 | memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph)); | |
267 | ||
268 | skb->len = 0; | |
269 | buf = skb_put(skb, packetsize + ETH_HLEN); | |
270 | ||
271 | ethh = (struct ethhdr *) buf; | |
272 | buf += ETH_HLEN; | |
273 | ||
274 | iph = (struct iphdr *)buf; | |
275 | buf += sizeof(*iph); | |
276 | tcph = (struct tcphdr *)buf; | |
277 | skb_reset_mac_header(skb); | |
278 | skb_set_network_header(skb, ETH_HLEN); | |
279 | skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph)); | |
280 | buf += sizeof(*tcph); | |
281 | ||
282 | skb->ip_summed = CHECKSUM_PARTIAL; | |
283 | skb->protocol = htons(0x800); | |
284 | skb->data_len = 0; | |
285 | skb->mac_len = ETH_HLEN; | |
286 | ||
287 | memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN); | |
288 | memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN); | |
289 | ethh->h_proto = htons(0x0800); | |
290 | ||
291 | iph->version = IPVERSION; | |
292 | iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ | |
293 | iph->tos = 0; | |
294 | iph->tot_len = htons(packetsize); | |
295 | iph->id = htons(++cm_node->tcp_cntxt.loc_id); | |
296 | ||
297 | iph->frag_off = htons(0x4000); | |
298 | iph->ttl = 0x40; | |
299 | iph->protocol = 0x06; /* IPPROTO_TCP */ | |
300 | ||
301 | iph->saddr = htonl(cm_node->loc_addr); | |
302 | iph->daddr = htonl(cm_node->rem_addr); | |
303 | ||
304 | tcph->source = htons(cm_node->loc_port); | |
305 | tcph->dest = htons(cm_node->rem_port); | |
306 | tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); | |
307 | ||
308 | if (flags & SET_ACK) { | |
309 | cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; | |
310 | tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); | |
311 | tcph->ack = 1; | |
312 | } else | |
313 | tcph->ack_seq = 0; | |
314 | ||
315 | if (flags & SET_SYN) { | |
316 | cm_node->tcp_cntxt.loc_seq_num++; | |
317 | tcph->syn = 1; | |
318 | } else | |
6492cdf3 | 319 | cm_node->tcp_cntxt.loc_seq_num += datasize; |
3c2d774c | 320 | |
6492cdf3 FL |
321 | if (flags & SET_FIN) { |
322 | cm_node->tcp_cntxt.loc_seq_num++; | |
3c2d774c | 323 | tcph->fin = 1; |
6492cdf3 | 324 | } |
3c2d774c GS |
325 | |
326 | if (flags & SET_RST) | |
327 | tcph->rst = 1; | |
328 | ||
329 | tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2); | |
330 | tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); | |
331 | tcph->urg_ptr = 0; | |
332 | if (optionsize) | |
333 | memcpy(buf, options, optionsize); | |
334 | buf += optionsize; | |
335 | if (datasize) | |
336 | memcpy(buf, data, datasize); | |
337 | ||
338 | skb_shinfo(skb)->nr_frags = 0; | |
339 | cm_packets_created++; | |
340 | ||
3c2d774c GS |
341 | } |
342 | ||
343 | ||
344 | /** | |
345 | * print_core - dump a cm core | |
346 | */ | |
347 | static void print_core(struct nes_cm_core *core) | |
348 | { | |
349 | nes_debug(NES_DBG_CM, "---------------------------------------------\n"); | |
350 | nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core); | |
351 | if (!core) | |
352 | return; | |
353 | nes_debug(NES_DBG_CM, "---------------------------------------------\n"); | |
3c2d774c GS |
354 | |
355 | nes_debug(NES_DBG_CM, "State : %u \n", core->state); | |
356 | ||
3c2d774c GS |
357 | nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt)); |
358 | nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt)); | |
359 | ||
360 | nes_debug(NES_DBG_CM, "core : %p \n", core); | |
361 | ||
362 | nes_debug(NES_DBG_CM, "-------------- end core ---------------\n"); | |
363 | } | |
364 | ||
365 | ||
366 | /** | |
367 | * schedule_nes_timer | |
368 | * note - cm_node needs to be protected before calling this. Encase in: | |
369 | * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node); | |
370 | */ | |
371 | int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
372 | enum nes_timer_type type, int send_retrans, | |
373 | int close_when_complete) | |
374 | { | |
375 | unsigned long flags; | |
6492cdf3 | 376 | struct nes_cm_core *cm_core = cm_node->cm_core; |
3c2d774c GS |
377 | struct nes_timer_entry *new_send; |
378 | int ret = 0; | |
379 | u32 was_timer_set; | |
380 | ||
381 | new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); | |
382 | if (!new_send) | |
383 | return -1; | |
3c2d774c GS |
384 | |
385 | /* new_send->timetosend = currenttime */ | |
386 | new_send->retrycount = NES_DEFAULT_RETRYS; | |
387 | new_send->retranscount = NES_DEFAULT_RETRANS; | |
388 | new_send->skb = skb; | |
389 | new_send->timetosend = jiffies; | |
390 | new_send->type = type; | |
391 | new_send->netdev = cm_node->netdev; | |
392 | new_send->send_retrans = send_retrans; | |
393 | new_send->close_when_complete = close_when_complete; | |
394 | ||
395 | if (type == NES_TIMER_TYPE_CLOSE) { | |
6492cdf3 | 396 | new_send->timetosend += (HZ/10); |
3c2d774c GS |
397 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); |
398 | list_add_tail(&new_send->list, &cm_node->recv_list); | |
399 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
400 | } | |
401 | ||
402 | if (type == NES_TIMER_TYPE_SEND) { | |
b30db1c1 | 403 | new_send->seq_num = ntohl(tcp_hdr(skb)->seq); |
3c2d774c | 404 | atomic_inc(&new_send->skb->users); |
6492cdf3 FL |
405 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
406 | cm_node->send_entry = new_send; | |
407 | add_ref_cm_node(cm_node); | |
408 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
409 | new_send->timetosend = jiffies + NES_RETRY_TIMEOUT; | |
3c2d774c GS |
410 | |
411 | ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev); | |
412 | if (ret != NETDEV_TX_OK) { | |
6492cdf3 FL |
413 | nes_debug(NES_DBG_CM, "Error sending packet %p " |
414 | "(jiffies = %lu)\n", new_send, jiffies); | |
3c2d774c GS |
415 | atomic_dec(&new_send->skb->users); |
416 | new_send->timetosend = jiffies; | |
417 | } else { | |
418 | cm_packets_sent++; | |
419 | if (!send_retrans) { | |
6492cdf3 | 420 | cleanup_retrans_entry(cm_node); |
3c2d774c | 421 | if (close_when_complete) |
6492cdf3 | 422 | rem_ref_cm_node(cm_core, cm_node); |
3c2d774c GS |
423 | return ret; |
424 | } | |
3c2d774c | 425 | } |
3c2d774c | 426 | } |
3c2d774c GS |
427 | |
428 | was_timer_set = timer_pending(&cm_core->tcp_timer); | |
429 | ||
430 | if (!was_timer_set) { | |
431 | cm_core->tcp_timer.expires = new_send->timetosend; | |
432 | add_timer(&cm_core->tcp_timer); | |
433 | } | |
434 | ||
435 | return ret; | |
436 | } | |
437 | ||
438 | ||
439 | /** | |
440 | * nes_cm_timer_tick | |
441 | */ | |
1a855fbf | 442 | static void nes_cm_timer_tick(unsigned long pass) |
3c2d774c GS |
443 | { |
444 | unsigned long flags, qplockflags; | |
445 | unsigned long nexttimeout = jiffies + NES_LONG_TIME; | |
446 | struct iw_cm_id *cm_id; | |
447 | struct nes_cm_node *cm_node; | |
448 | struct nes_timer_entry *send_entry, *recv_entry; | |
449 | struct list_head *list_core, *list_core_temp; | |
450 | struct list_head *list_node, *list_node_temp; | |
451 | struct nes_cm_core *cm_core = g_cm_core; | |
452 | struct nes_qp *nesqp; | |
3c2d774c GS |
453 | u32 settimer = 0; |
454 | int ret = NETDEV_TX_OK; | |
6492cdf3 | 455 | enum nes_cm_node_state last_state; |
3c2d774c | 456 | |
879e5bd5 FL |
457 | struct list_head timer_list; |
458 | INIT_LIST_HEAD(&timer_list); | |
3c2d774c GS |
459 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
460 | ||
6492cdf3 | 461 | list_for_each_safe(list_node, list_core_temp, |
879e5bd5 | 462 | &cm_core->connected_nodes) { |
3c2d774c | 463 | cm_node = container_of(list_node, struct nes_cm_node, list); |
879e5bd5 FL |
464 | if (!list_empty(&cm_node->recv_list) || (cm_node->send_entry)) { |
465 | add_ref_cm_node(cm_node); | |
466 | list_add(&cm_node->timer_entry, &timer_list); | |
467 | } | |
468 | } | |
469 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
470 | ||
471 | list_for_each_safe(list_node, list_core_temp, &timer_list) { | |
472 | cm_node = container_of(list_node, struct nes_cm_node, | |
473 | timer_entry); | |
3c2d774c | 474 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); |
6492cdf3 FL |
475 | list_for_each_safe(list_core, list_node_temp, |
476 | &cm_node->recv_list) { | |
477 | recv_entry = container_of(list_core, | |
478 | struct nes_timer_entry, list); | |
479 | if (!recv_entry) | |
480 | break; | |
481 | if (time_after(recv_entry->timetosend, jiffies)) { | |
482 | if (nexttimeout > recv_entry->timetosend || | |
483 | !settimer) { | |
3c2d774c GS |
484 | nexttimeout = recv_entry->timetosend; |
485 | settimer = 1; | |
486 | } | |
487 | continue; | |
488 | } | |
489 | list_del(&recv_entry->list); | |
490 | cm_id = cm_node->cm_id; | |
491 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
6492cdf3 FL |
492 | nesqp = (struct nes_qp *)recv_entry->skb; |
493 | spin_lock_irqsave(&nesqp->lock, qplockflags); | |
494 | if (nesqp->cm_id) { | |
495 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, " | |
496 | "refcount = %d: HIT A " | |
497 | "NES_TIMER_TYPE_CLOSE with something " | |
498 | "to do!!!\n", nesqp->hwqp.qp_id, cm_id, | |
499 | atomic_read(&nesqp->refcount)); | |
500 | nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED; | |
501 | nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT; | |
502 | nesqp->ibqp_state = IB_QPS_ERR; | |
503 | spin_unlock_irqrestore(&nesqp->lock, | |
504 | qplockflags); | |
505 | nes_cm_disconn(nesqp); | |
506 | } else { | |
507 | spin_unlock_irqrestore(&nesqp->lock, | |
508 | qplockflags); | |
509 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, " | |
510 | "refcount = %d: HIT A " | |
511 | "NES_TIMER_TYPE_CLOSE with nothing " | |
512 | "to do!!!\n", nesqp->hwqp.qp_id, cm_id, | |
513 | atomic_read(&nesqp->refcount)); | |
3c2d774c | 514 | } |
6492cdf3 FL |
515 | if (cm_id) |
516 | cm_id->rem_ref(cm_id); | |
517 | ||
3c2d774c GS |
518 | kfree(recv_entry); |
519 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
520 | } | |
521 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
522 | ||
523 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
6492cdf3 FL |
524 | do { |
525 | send_entry = cm_node->send_entry; | |
526 | if (!send_entry) | |
c5d321e5 | 527 | break; |
3c2d774c GS |
528 | if (time_after(send_entry->timetosend, jiffies)) { |
529 | if (cm_node->state != NES_CM_STATE_TSA) { | |
6492cdf3 FL |
530 | if ((nexttimeout > |
531 | send_entry->timetosend) || | |
532 | !settimer) { | |
533 | nexttimeout = | |
534 | send_entry->timetosend; | |
3c2d774c | 535 | settimer = 1; |
c5d321e5 | 536 | break; |
3c2d774c | 537 | } |
3c2d774c | 538 | } else { |
6492cdf3 | 539 | free_retrans_entry(cm_node); |
c5d321e5 | 540 | break; |
3c2d774c GS |
541 | } |
542 | } | |
6492cdf3 FL |
543 | |
544 | if ((cm_node->state == NES_CM_STATE_TSA) || | |
545 | (cm_node->state == NES_CM_STATE_CLOSED)) { | |
546 | free_retrans_entry(cm_node); | |
c5d321e5 | 547 | break; |
3c2d774c GS |
548 | } |
549 | ||
6492cdf3 FL |
550 | if (!send_entry->retranscount || |
551 | !send_entry->retrycount) { | |
3c2d774c | 552 | cm_packets_dropped++; |
6492cdf3 FL |
553 | last_state = cm_node->state; |
554 | cm_node->state = NES_CM_STATE_CLOSED; | |
555 | free_retrans_entry(cm_node); | |
556 | spin_unlock_irqrestore( | |
557 | &cm_node->retrans_list_lock, flags); | |
558 | if (last_state == NES_CM_STATE_SYN_RCVD) | |
3c2d774c | 559 | rem_ref_cm_node(cm_core, cm_node); |
6492cdf3 FL |
560 | else |
561 | create_event(cm_node, | |
562 | NES_CM_EVENT_ABORTED); | |
563 | spin_lock_irqsave(&cm_node->retrans_list_lock, | |
564 | flags); | |
c5d321e5 | 565 | break; |
3c2d774c | 566 | } |
3c2d774c GS |
567 | atomic_inc(&send_entry->skb->users); |
568 | cm_packets_retrans++; | |
6492cdf3 FL |
569 | nes_debug(NES_DBG_CM, "Retransmitting send_entry %p " |
570 | "for node %p, jiffies = %lu, time to send = " | |
571 | "%lu, retranscount = %u, send_entry->seq_num = " | |
572 | "0x%08X, cm_node->tcp_cntxt.rem_ack_num = " | |
573 | "0x%08X\n", send_entry, cm_node, jiffies, | |
574 | send_entry->timetosend, | |
575 | send_entry->retranscount, | |
576 | send_entry->seq_num, | |
577 | cm_node->tcp_cntxt.rem_ack_num); | |
578 | ||
579 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, | |
580 | flags); | |
3c2d774c | 581 | ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev); |
6492cdf3 | 582 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
3c2d774c | 583 | if (ret != NETDEV_TX_OK) { |
6492cdf3 FL |
584 | nes_debug(NES_DBG_CM, "rexmit failed for " |
585 | "node=%p\n", cm_node); | |
3c2d774c GS |
586 | cm_packets_bounced++; |
587 | atomic_dec(&send_entry->skb->users); | |
588 | send_entry->retrycount--; | |
589 | nexttimeout = jiffies + NES_SHORT_TIME; | |
590 | settimer = 1; | |
c5d321e5 | 591 | break; |
3c2d774c GS |
592 | } else { |
593 | cm_packets_sent++; | |
594 | } | |
6492cdf3 FL |
595 | nes_debug(NES_DBG_CM, "Packet Sent: retrans count = " |
596 | "%u, retry count = %u.\n", | |
597 | send_entry->retranscount, | |
598 | send_entry->retrycount); | |
3c2d774c GS |
599 | if (send_entry->send_retrans) { |
600 | send_entry->retranscount--; | |
6492cdf3 FL |
601 | send_entry->timetosend = jiffies + |
602 | NES_RETRY_TIMEOUT; | |
603 | if (nexttimeout > send_entry->timetosend || | |
604 | !settimer) { | |
3c2d774c GS |
605 | nexttimeout = send_entry->timetosend; |
606 | settimer = 1; | |
607 | } | |
3c2d774c GS |
608 | } else { |
609 | int close_when_complete; | |
6492cdf3 FL |
610 | close_when_complete = |
611 | send_entry->close_when_complete; | |
612 | nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n", | |
613 | cm_node, cm_node->state); | |
614 | free_retrans_entry(cm_node); | |
615 | if (close_when_complete) | |
616 | rem_ref_cm_node(cm_node->cm_core, | |
617 | cm_node); | |
3c2d774c | 618 | } |
6492cdf3 | 619 | } while (0); |
3c2d774c | 620 | |
6492cdf3 FL |
621 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
622 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
6492cdf3 FL |
623 | if (ret != NETDEV_TX_OK) { |
624 | nes_debug(NES_DBG_CM, "rexmit failed for cm_node=%p\n", | |
625 | cm_node); | |
3c2d774c | 626 | break; |
6492cdf3 | 627 | } |
3c2d774c | 628 | } |
3c2d774c GS |
629 | |
630 | if (settimer) { | |
631 | if (!timer_pending(&cm_core->tcp_timer)) { | |
632 | cm_core->tcp_timer.expires = nexttimeout; | |
633 | add_timer(&cm_core->tcp_timer); | |
634 | } | |
635 | } | |
636 | } | |
637 | ||
638 | ||
639 | /** | |
640 | * send_syn | |
641 | */ | |
6492cdf3 FL |
642 | static int send_syn(struct nes_cm_node *cm_node, u32 sendack, |
643 | struct sk_buff *skb) | |
3c2d774c GS |
644 | { |
645 | int ret; | |
646 | int flags = SET_SYN; | |
3c2d774c | 647 | char optionsbuffer[sizeof(struct option_mss) + |
6492cdf3 FL |
648 | sizeof(struct option_windowscale) + sizeof(struct option_base) + |
649 | TCP_OPTIONS_PADDING]; | |
3c2d774c GS |
650 | |
651 | int optionssize = 0; | |
652 | /* Sending MSS option */ | |
653 | union all_known_options *options; | |
654 | ||
655 | if (!cm_node) | |
656 | return -EINVAL; | |
657 | ||
658 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
659 | options->as_mss.optionnum = OPTION_NUMBER_MSS; | |
660 | options->as_mss.length = sizeof(struct option_mss); | |
661 | options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); | |
662 | optionssize += sizeof(struct option_mss); | |
663 | ||
664 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
665 | options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; | |
666 | options->as_windowscale.length = sizeof(struct option_windowscale); | |
667 | options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; | |
668 | optionssize += sizeof(struct option_windowscale); | |
669 | ||
6492cdf3 | 670 | if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) { |
3c2d774c GS |
671 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
672 | options->as_base.optionnum = OPTION_NUMBER_WRITE0; | |
673 | options->as_base.length = sizeof(struct option_base); | |
674 | optionssize += sizeof(struct option_base); | |
675 | /* we need the size to be a multiple of 4 */ | |
676 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
677 | options->as_end = 1; | |
678 | optionssize += 1; | |
679 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
680 | options->as_end = 1; | |
681 | optionssize += 1; | |
682 | } | |
683 | ||
684 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
685 | options->as_end = OPTION_NUMBER_END; | |
686 | optionssize += 1; | |
687 | ||
6492cdf3 | 688 | if (!skb) |
e189062a | 689 | skb = dev_alloc_skb(MAX_CM_BUFFER); |
3c2d774c GS |
690 | if (!skb) { |
691 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
692 | return -1; | |
693 | } | |
694 | ||
695 | if (sendack) | |
696 | flags |= SET_ACK; | |
697 | ||
698 | form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags); | |
699 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
700 | ||
701 | return ret; | |
702 | } | |
703 | ||
704 | ||
705 | /** | |
706 | * send_reset | |
707 | */ | |
6492cdf3 | 708 | static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb) |
3c2d774c GS |
709 | { |
710 | int ret; | |
3c2d774c GS |
711 | int flags = SET_RST | SET_ACK; |
712 | ||
6492cdf3 | 713 | if (!skb) |
e189062a | 714 | skb = dev_alloc_skb(MAX_CM_BUFFER); |
3c2d774c GS |
715 | if (!skb) { |
716 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
717 | return -1; | |
718 | } | |
719 | ||
3c2d774c GS |
720 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags); |
721 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1); | |
722 | ||
723 | return ret; | |
724 | } | |
725 | ||
726 | ||
727 | /** | |
728 | * send_ack | |
729 | */ | |
6492cdf3 | 730 | static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb) |
3c2d774c GS |
731 | { |
732 | int ret; | |
6492cdf3 FL |
733 | |
734 | if (!skb) | |
e189062a | 735 | skb = dev_alloc_skb(MAX_CM_BUFFER); |
3c2d774c GS |
736 | |
737 | if (!skb) { | |
738 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
739 | return -1; | |
740 | } | |
741 | ||
742 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK); | |
743 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0); | |
744 | ||
745 | return ret; | |
746 | } | |
747 | ||
748 | ||
749 | /** | |
750 | * send_fin | |
751 | */ | |
1a855fbf | 752 | static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb) |
3c2d774c GS |
753 | { |
754 | int ret; | |
755 | ||
756 | /* if we didn't get a frame get one */ | |
757 | if (!skb) | |
e189062a | 758 | skb = dev_alloc_skb(MAX_CM_BUFFER); |
3c2d774c GS |
759 | |
760 | if (!skb) { | |
761 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
762 | return -1; | |
763 | } | |
764 | ||
765 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN); | |
766 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
767 | ||
768 | return ret; | |
769 | } | |
770 | ||
771 | ||
3c2d774c GS |
772 | /** |
773 | * find_node - find a cm node that matches the reference cm node | |
774 | */ | |
775 | static struct nes_cm_node *find_node(struct nes_cm_core *cm_core, | |
776 | u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr) | |
777 | { | |
778 | unsigned long flags; | |
3c2d774c GS |
779 | struct list_head *hte; |
780 | struct nes_cm_node *cm_node; | |
03080e5c | 781 | __be32 tmp_addr = cpu_to_be32(loc_addr); |
3c2d774c | 782 | |
3c2d774c GS |
783 | /* get a handle on the hte */ |
784 | hte = &cm_core->connected_nodes; | |
785 | ||
63779436 | 786 | nes_debug(NES_DBG_CM, "Searching for an owner node: %pI4:%x from core %p->%p\n", |
03080e5c | 787 | &tmp_addr, loc_port, cm_core, hte); |
3c2d774c GS |
788 | |
789 | /* walk list and find cm_node associated with this session ID */ | |
790 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
4e96a774 | 791 | list_for_each_entry(cm_node, hte, list) { |
3c2d774c GS |
792 | /* compare quad, return node handle if a match */ |
793 | nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n", | |
794 | cm_node->loc_addr, cm_node->loc_port, | |
795 | loc_addr, loc_port, | |
796 | cm_node->rem_addr, cm_node->rem_port, | |
797 | rem_addr, rem_port); | |
798 | if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) && | |
799 | (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) { | |
800 | add_ref_cm_node(cm_node); | |
801 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
802 | return cm_node; | |
803 | } | |
804 | } | |
805 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
806 | ||
807 | /* no owner node */ | |
808 | return NULL; | |
809 | } | |
810 | ||
811 | ||
812 | /** | |
813 | * find_listener - find a cm node listening on this addr-port pair | |
814 | */ | |
815 | static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core, | |
816 | nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state) | |
817 | { | |
818 | unsigned long flags; | |
3c2d774c | 819 | struct nes_cm_listener *listen_node; |
03080e5c | 820 | __be32 tmp_addr = cpu_to_be32(dst_addr); |
3c2d774c GS |
821 | |
822 | /* walk list and find cm_node associated with this session ID */ | |
823 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); | |
4e96a774 | 824 | list_for_each_entry(listen_node, &cm_core->listen_list.list, list) { |
3c2d774c GS |
825 | /* compare node pair, return node handle if a match */ |
826 | if (((listen_node->loc_addr == dst_addr) || | |
827 | listen_node->loc_addr == 0x00000000) && | |
828 | (listen_node->loc_port == dst_port) && | |
829 | (listener_state & listen_node->listener_state)) { | |
830 | atomic_inc(&listen_node->ref_count); | |
831 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
832 | return listen_node; | |
833 | } | |
834 | } | |
835 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
836 | ||
63779436 | 837 | nes_debug(NES_DBG_CM, "Unable to find listener for %pI4:%x\n", |
03080e5c | 838 | &tmp_addr, dst_port); |
3c2d774c GS |
839 | |
840 | /* no listener */ | |
841 | return NULL; | |
842 | } | |
843 | ||
844 | ||
845 | /** | |
846 | * add_hte_node - add a cm node to the hash table | |
847 | */ | |
848 | static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node) | |
849 | { | |
850 | unsigned long flags; | |
3c2d774c GS |
851 | struct list_head *hte; |
852 | ||
853 | if (!cm_node || !cm_core) | |
854 | return -EINVAL; | |
855 | ||
6492cdf3 FL |
856 | nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n", |
857 | cm_node); | |
3c2d774c | 858 | |
3c2d774c GS |
859 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
860 | ||
861 | /* get a handle on the hash table element (list head for this slot) */ | |
862 | hte = &cm_core->connected_nodes; | |
863 | list_add_tail(&cm_node->list, hte); | |
864 | atomic_inc(&cm_core->ht_node_cnt); | |
865 | ||
866 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
867 | ||
868 | return 0; | |
869 | } | |
870 | ||
871 | ||
872 | /** | |
873 | * mini_cm_dec_refcnt_listen | |
874 | */ | |
875 | static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core, | |
6492cdf3 | 876 | struct nes_cm_listener *listener, int free_hanging_nodes) |
3c2d774c GS |
877 | { |
878 | int ret = 1; | |
879 | unsigned long flags; | |
6492cdf3 FL |
880 | struct list_head *list_pos = NULL; |
881 | struct list_head *list_temp = NULL; | |
882 | struct nes_cm_node *cm_node = NULL; | |
879e5bd5 | 883 | struct list_head reset_list; |
6492cdf3 FL |
884 | |
885 | nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, " | |
886 | "refcnt=%d\n", listener, free_hanging_nodes, | |
887 | atomic_read(&listener->ref_count)); | |
888 | /* free non-accelerated child nodes for this listener */ | |
879e5bd5 | 889 | INIT_LIST_HEAD(&reset_list); |
6492cdf3 FL |
890 | if (free_hanging_nodes) { |
891 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
892 | list_for_each_safe(list_pos, list_temp, | |
879e5bd5 | 893 | &g_cm_core->connected_nodes) { |
6492cdf3 FL |
894 | cm_node = container_of(list_pos, struct nes_cm_node, |
895 | list); | |
896 | if ((cm_node->listener == listener) && | |
879e5bd5 FL |
897 | (!cm_node->accelerated)) { |
898 | add_ref_cm_node(cm_node); | |
899 | list_add(&cm_node->reset_entry, &reset_list); | |
6492cdf3 FL |
900 | } |
901 | } | |
902 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
903 | } | |
879e5bd5 FL |
904 | |
905 | list_for_each_safe(list_pos, list_temp, &reset_list) { | |
906 | cm_node = container_of(list_pos, struct nes_cm_node, | |
907 | reset_entry); | |
908 | cleanup_retrans_entry(cm_node); | |
909 | send_reset(cm_node, NULL); | |
910 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
911 | } | |
912 | ||
3c2d774c GS |
913 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
914 | if (!atomic_dec_return(&listener->ref_count)) { | |
915 | list_del(&listener->list); | |
916 | ||
917 | /* decrement our listen node count */ | |
918 | atomic_dec(&cm_core->listen_node_cnt); | |
919 | ||
920 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
921 | ||
922 | if (listener->nesvnic) { | |
923 | nes_manage_apbvt(listener->nesvnic, listener->loc_port, | |
924 | PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL); | |
925 | } | |
926 | ||
927 | nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener); | |
928 | ||
929 | kfree(listener); | |
a2e9c384 | 930 | listener = NULL; |
3c2d774c GS |
931 | ret = 0; |
932 | cm_listens_destroyed++; | |
933 | } else { | |
934 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
935 | } | |
936 | if (listener) { | |
937 | if (atomic_read(&listener->pend_accepts_cnt) > 0) | |
938 | nes_debug(NES_DBG_CM, "destroying listener (%p)" | |
939 | " with non-zero pending accepts=%u\n", | |
940 | listener, atomic_read(&listener->pend_accepts_cnt)); | |
941 | } | |
942 | ||
943 | return ret; | |
944 | } | |
945 | ||
946 | ||
947 | /** | |
948 | * mini_cm_del_listen | |
949 | */ | |
950 | static int mini_cm_del_listen(struct nes_cm_core *cm_core, | |
951 | struct nes_cm_listener *listener) | |
952 | { | |
953 | listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE; | |
954 | listener->cm_id = NULL; /* going to be destroyed pretty soon */ | |
955 | return mini_cm_dec_refcnt_listen(cm_core, listener, 1); | |
956 | } | |
957 | ||
958 | ||
959 | /** | |
960 | * mini_cm_accelerated | |
961 | */ | |
962 | static inline int mini_cm_accelerated(struct nes_cm_core *cm_core, | |
963 | struct nes_cm_node *cm_node) | |
964 | { | |
965 | u32 was_timer_set; | |
966 | cm_node->accelerated = 1; | |
967 | ||
968 | if (cm_node->accept_pend) { | |
969 | BUG_ON(!cm_node->listener); | |
970 | atomic_dec(&cm_node->listener->pend_accepts_cnt); | |
971 | BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); | |
972 | } | |
973 | ||
974 | was_timer_set = timer_pending(&cm_core->tcp_timer); | |
975 | if (!was_timer_set) { | |
976 | cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME; | |
977 | add_timer(&cm_core->tcp_timer); | |
978 | } | |
979 | ||
980 | return 0; | |
981 | } | |
982 | ||
983 | ||
984 | /** | |
7191a0a1 | 985 | * nes_addr_resolve_neigh |
3c2d774c | 986 | */ |
7191a0a1 | 987 | static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip) |
3c2d774c GS |
988 | { |
989 | struct rtable *rt; | |
990 | struct flowi fl; | |
7191a0a1 BS |
991 | struct neighbour *neigh; |
992 | int rc = -1; | |
3c2d774c GS |
993 | |
994 | memset(&fl, 0, sizeof fl); | |
995 | fl.nl_u.ip4_u.daddr = htonl(dst_ip); | |
996 | if (ip_route_output_key(&init_net, &rt, &fl)) { | |
997 | printk("%s: ip_route_output_key failed for 0x%08X\n", | |
33718363 | 998 | __func__, dst_ip); |
7191a0a1 | 999 | return rc; |
3c2d774c GS |
1000 | } |
1001 | ||
7191a0a1 BS |
1002 | neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev); |
1003 | if (neigh) { | |
1004 | if (neigh->nud_state & NUD_VALID) { | |
1005 | nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X" | |
e174961c JB |
1006 | " is %pM, Gateway is 0x%08X \n", dst_ip, |
1007 | neigh->ha, ntohl(rt->rt_gateway)); | |
7191a0a1 BS |
1008 | nes_manage_arp_cache(nesvnic->netdev, neigh->ha, |
1009 | dst_ip, NES_ARP_ADD); | |
1010 | rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL, | |
1011 | NES_ARP_RESOLVE); | |
1012 | } | |
1013 | neigh_release(neigh); | |
1014 | } | |
1015 | ||
1016 | if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID))) | |
1017 | neigh_event_send(rt->u.dst.neighbour, NULL); | |
1018 | ||
3c2d774c | 1019 | ip_rt_put(rt); |
7191a0a1 | 1020 | return rc; |
3c2d774c GS |
1021 | } |
1022 | ||
1023 | ||
1024 | /** | |
1025 | * make_cm_node - create a new instance of a cm node | |
1026 | */ | |
1027 | static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core, | |
1028 | struct nes_vnic *nesvnic, struct nes_cm_info *cm_info, | |
1029 | struct nes_cm_listener *listener) | |
1030 | { | |
1031 | struct nes_cm_node *cm_node; | |
1032 | struct timespec ts; | |
1033 | int arpindex = 0; | |
1034 | struct nes_device *nesdev; | |
1035 | struct nes_adapter *nesadapter; | |
1036 | ||
1037 | /* create an hte and cm_node for this instance */ | |
1038 | cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); | |
1039 | if (!cm_node) | |
1040 | return NULL; | |
1041 | ||
1042 | /* set our node specific transport info */ | |
1043 | cm_node->loc_addr = cm_info->loc_addr; | |
1044 | cm_node->rem_addr = cm_info->rem_addr; | |
1045 | cm_node->loc_port = cm_info->loc_port; | |
1046 | cm_node->rem_port = cm_info->rem_port; | |
1047 | cm_node->send_write0 = send_first; | |
63779436 HH |
1048 | nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n", |
1049 | &cm_node->loc_addr, cm_node->loc_port, | |
1050 | &cm_node->rem_addr, cm_node->rem_port); | |
3c2d774c GS |
1051 | cm_node->listener = listener; |
1052 | cm_node->netdev = nesvnic->netdev; | |
1053 | cm_node->cm_id = cm_info->cm_id; | |
1054 | memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN); | |
1055 | ||
6492cdf3 FL |
1056 | nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener, |
1057 | cm_node->cm_id); | |
3c2d774c | 1058 | |
3c2d774c GS |
1059 | spin_lock_init(&cm_node->retrans_list_lock); |
1060 | INIT_LIST_HEAD(&cm_node->recv_list); | |
1061 | spin_lock_init(&cm_node->recv_list_lock); | |
1062 | ||
1063 | cm_node->loopbackpartner = NULL; | |
1064 | atomic_set(&cm_node->ref_count, 1); | |
1065 | /* associate our parent CM core */ | |
1066 | cm_node->cm_core = cm_core; | |
1067 | cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID; | |
1068 | cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; | |
1069 | cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >> | |
1070 | NES_CM_DEFAULT_RCV_WND_SCALE; | |
1071 | ts = current_kernel_time(); | |
1072 | cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec); | |
1073 | cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) - | |
f2b2b59b | 1074 | sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN; |
3c2d774c GS |
1075 | cm_node->tcp_cntxt.rcv_nxt = 0; |
1076 | /* get a unique session ID , add thread_id to an upcounter to handle race */ | |
1077 | atomic_inc(&cm_core->node_cnt); | |
3c2d774c GS |
1078 | cm_node->conn_type = cm_info->conn_type; |
1079 | cm_node->apbvt_set = 0; | |
1080 | cm_node->accept_pend = 0; | |
1081 | ||
1082 | cm_node->nesvnic = nesvnic; | |
1083 | /* get some device handles, for arp lookup */ | |
1084 | nesdev = nesvnic->nesdev; | |
1085 | nesadapter = nesdev->nesadapter; | |
1086 | ||
1087 | cm_node->loopbackpartner = NULL; | |
1088 | /* get the mac addr for the remote node */ | |
1ee86555 CT |
1089 | if (ipv4_is_loopback(htonl(cm_node->rem_addr))) |
1090 | arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE); | |
1091 | else | |
1092 | arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE); | |
3c2d774c | 1093 | if (arpindex < 0) { |
7191a0a1 BS |
1094 | arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr); |
1095 | if (arpindex < 0) { | |
1096 | kfree(cm_node); | |
1097 | return NULL; | |
1098 | } | |
3c2d774c GS |
1099 | } |
1100 | ||
1101 | /* copy the mac addr to node context */ | |
1102 | memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN); | |
e174961c JB |
1103 | nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n", |
1104 | cm_node->rem_mac); | |
3c2d774c GS |
1105 | |
1106 | add_hte_node(cm_core, cm_node); | |
1107 | atomic_inc(&cm_nodes_created); | |
1108 | ||
1109 | return cm_node; | |
1110 | } | |
1111 | ||
1112 | ||
1113 | /** | |
1114 | * add_ref_cm_node - destroy an instance of a cm node | |
1115 | */ | |
1116 | static int add_ref_cm_node(struct nes_cm_node *cm_node) | |
1117 | { | |
1118 | atomic_inc(&cm_node->ref_count); | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | ||
1123 | /** | |
1124 | * rem_ref_cm_node - destroy an instance of a cm node | |
1125 | */ | |
1126 | static int rem_ref_cm_node(struct nes_cm_core *cm_core, | |
6492cdf3 | 1127 | struct nes_cm_node *cm_node) |
3c2d774c GS |
1128 | { |
1129 | unsigned long flags, qplockflags; | |
3c2d774c GS |
1130 | struct nes_timer_entry *recv_entry; |
1131 | struct iw_cm_id *cm_id; | |
1132 | struct list_head *list_core, *list_node_temp; | |
1133 | struct nes_qp *nesqp; | |
1134 | ||
1135 | if (!cm_node) | |
1136 | return -EINVAL; | |
1137 | ||
1138 | spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); | |
1139 | if (atomic_dec_return(&cm_node->ref_count)) { | |
1140 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); | |
1141 | return 0; | |
1142 | } | |
1143 | list_del(&cm_node->list); | |
1144 | atomic_dec(&cm_core->ht_node_cnt); | |
1145 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); | |
1146 | ||
1147 | /* if the node is destroyed before connection was accelerated */ | |
1148 | if (!cm_node->accelerated && cm_node->accept_pend) { | |
1149 | BUG_ON(!cm_node->listener); | |
1150 | atomic_dec(&cm_node->listener->pend_accepts_cnt); | |
1151 | BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); | |
1152 | } | |
6492cdf3 | 1153 | BUG_ON(cm_node->send_entry); |
3c2d774c GS |
1154 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); |
1155 | list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) { | |
6492cdf3 FL |
1156 | recv_entry = container_of(list_core, struct nes_timer_entry, |
1157 | list); | |
3c2d774c GS |
1158 | list_del(&recv_entry->list); |
1159 | cm_id = cm_node->cm_id; | |
1160 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
6492cdf3 FL |
1161 | nesqp = (struct nes_qp *)recv_entry->skb; |
1162 | spin_lock_irqsave(&nesqp->lock, qplockflags); | |
1163 | if (nesqp->cm_id) { | |
1164 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A " | |
1165 | "NES_TIMER_TYPE_CLOSE with something to do!\n", | |
1166 | nesqp->hwqp.qp_id, cm_id); | |
1167 | nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED; | |
1168 | nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT; | |
1169 | nesqp->ibqp_state = IB_QPS_ERR; | |
1170 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
1171 | nes_cm_disconn(nesqp); | |
1172 | } else { | |
1173 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
1174 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A " | |
1175 | "NES_TIMER_TYPE_CLOSE with nothing to do!\n", | |
1176 | nesqp->hwqp.qp_id, cm_id); | |
3c2d774c | 1177 | } |
6492cdf3 FL |
1178 | cm_id->rem_ref(cm_id); |
1179 | ||
3c2d774c GS |
1180 | kfree(recv_entry); |
1181 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
1182 | } | |
1183 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
1184 | ||
1185 | if (cm_node->listener) { | |
1186 | mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0); | |
1187 | } else { | |
1188 | if (cm_node->apbvt_set && cm_node->nesvnic) { | |
1189 | nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port, | |
6492cdf3 FL |
1190 | PCI_FUNC( |
1191 | cm_node->nesvnic->nesdev->pcidev->devfn), | |
1192 | NES_MANAGE_APBVT_DEL); | |
3c2d774c GS |
1193 | } |
1194 | } | |
1195 | ||
3c2d774c GS |
1196 | atomic_dec(&cm_core->node_cnt); |
1197 | atomic_inc(&cm_nodes_destroyed); | |
6492cdf3 FL |
1198 | nesqp = cm_node->nesqp; |
1199 | if (nesqp) { | |
1200 | nesqp->cm_node = NULL; | |
1201 | nes_rem_ref(&nesqp->ibqp); | |
1202 | cm_node->nesqp = NULL; | |
1203 | } | |
3c2d774c | 1204 | |
6492cdf3 FL |
1205 | cm_node->freed = 1; |
1206 | kfree(cm_node); | |
3c2d774c GS |
1207 | return 0; |
1208 | } | |
1209 | ||
3c2d774c GS |
1210 | /** |
1211 | * process_options | |
1212 | */ | |
6492cdf3 FL |
1213 | static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc, |
1214 | u32 optionsize, u32 syn_packet) | |
3c2d774c GS |
1215 | { |
1216 | u32 tmp; | |
1217 | u32 offset = 0; | |
1218 | union all_known_options *all_options; | |
1219 | char got_mss_option = 0; | |
1220 | ||
1221 | while (offset < optionsize) { | |
1222 | all_options = (union all_known_options *)(optionsloc + offset); | |
1223 | switch (all_options->as_base.optionnum) { | |
6492cdf3 FL |
1224 | case OPTION_NUMBER_END: |
1225 | offset = optionsize; | |
1226 | break; | |
1227 | case OPTION_NUMBER_NONE: | |
1228 | offset += 1; | |
1229 | continue; | |
1230 | case OPTION_NUMBER_MSS: | |
1231 | nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d " | |
1232 | "Size: %d\n", __func__, | |
1233 | all_options->as_mss.length, offset, optionsize); | |
1234 | got_mss_option = 1; | |
1235 | if (all_options->as_mss.length != 4) { | |
1236 | return 1; | |
1237 | } else { | |
1238 | tmp = ntohs(all_options->as_mss.mss); | |
1239 | if (tmp > 0 && tmp < | |
1240 | cm_node->tcp_cntxt.mss) | |
1241 | cm_node->tcp_cntxt.mss = tmp; | |
1242 | } | |
1243 | break; | |
1244 | case OPTION_NUMBER_WINDOW_SCALE: | |
1245 | cm_node->tcp_cntxt.snd_wscale = | |
1246 | all_options->as_windowscale.shiftcount; | |
1247 | break; | |
1248 | case OPTION_NUMBER_WRITE0: | |
1249 | cm_node->send_write0 = 1; | |
1250 | break; | |
1251 | default: | |
1252 | nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n", | |
1253 | all_options->as_base.optionnum); | |
1254 | break; | |
3c2d774c GS |
1255 | } |
1256 | offset += all_options->as_base.length; | |
1257 | } | |
1258 | if ((!got_mss_option) && (syn_packet)) | |
1259 | cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS; | |
1260 | return 0; | |
1261 | } | |
1262 | ||
6492cdf3 FL |
1263 | static void drop_packet(struct sk_buff *skb) |
1264 | { | |
1265 | atomic_inc(&cm_accel_dropped_pkts); | |
1266 | dev_kfree_skb_any(skb); | |
1267 | } | |
3c2d774c | 1268 | |
6492cdf3 FL |
1269 | static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1270 | struct tcphdr *tcph) | |
3c2d774c | 1271 | { |
6492cdf3 FL |
1272 | nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. " |
1273 | "refcnt=%d\n", cm_node, cm_node->state, | |
1274 | atomic_read(&cm_node->ref_count)); | |
1275 | cm_node->tcp_cntxt.rcv_nxt++; | |
1276 | cleanup_retrans_entry(cm_node); | |
1277 | switch (cm_node->state) { | |
1278 | case NES_CM_STATE_SYN_RCVD: | |
1279 | case NES_CM_STATE_SYN_SENT: | |
1280 | case NES_CM_STATE_ESTABLISHED: | |
1281 | case NES_CM_STATE_MPAREQ_SENT: | |
1282 | cm_node->state = NES_CM_STATE_LAST_ACK; | |
1283 | send_fin(cm_node, skb); | |
1284 | break; | |
1285 | case NES_CM_STATE_FIN_WAIT1: | |
1286 | cm_node->state = NES_CM_STATE_CLOSING; | |
1287 | send_ack(cm_node, skb); | |
1288 | break; | |
1289 | case NES_CM_STATE_FIN_WAIT2: | |
1290 | cm_node->state = NES_CM_STATE_TIME_WAIT; | |
1291 | send_ack(cm_node, skb); | |
1292 | cm_node->state = NES_CM_STATE_CLOSED; | |
1293 | break; | |
1294 | case NES_CM_STATE_TSA: | |
1295 | default: | |
1296 | nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n", | |
1297 | cm_node, cm_node->state); | |
1298 | drop_packet(skb); | |
1299 | break; | |
3c2d774c | 1300 | } |
6492cdf3 | 1301 | } |
3c2d774c | 1302 | |
3c2d774c | 1303 | |
6492cdf3 FL |
1304 | static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1305 | struct tcphdr *tcph) | |
1306 | { | |
3c2d774c | 1307 | |
6492cdf3 | 1308 | int reset = 0; /* whether to send reset in case of err.. */ |
183ecfa3 | 1309 | int passive_state; |
6492cdf3 FL |
1310 | atomic_inc(&cm_resets_recvd); |
1311 | nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u." | |
1312 | " refcnt=%d\n", cm_node, cm_node->state, | |
1313 | atomic_read(&cm_node->ref_count)); | |
1314 | cleanup_retrans_entry(cm_node); | |
1315 | switch (cm_node->state) { | |
1316 | case NES_CM_STATE_SYN_SENT: | |
1317 | case NES_CM_STATE_MPAREQ_SENT: | |
1318 | nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p " | |
1319 | "listener=%p state=%d\n", __func__, __LINE__, cm_node, | |
1320 | cm_node->listener, cm_node->state); | |
1321 | active_open_err(cm_node, skb, reset); | |
1322 | break; | |
183ecfa3 FL |
1323 | case NES_CM_STATE_MPAREQ_RCVD: |
1324 | passive_state = atomic_add_return(1, &cm_node->passive_state); | |
1325 | if (passive_state == NES_SEND_RESET_EVENT) | |
1326 | create_event(cm_node, NES_CM_EVENT_RESET); | |
1327 | cleanup_retrans_entry(cm_node); | |
1328 | cm_node->state = NES_CM_STATE_CLOSED; | |
1329 | dev_kfree_skb_any(skb); | |
1330 | break; | |
6492cdf3 FL |
1331 | case NES_CM_STATE_ESTABLISHED: |
1332 | case NES_CM_STATE_SYN_RCVD: | |
1333 | case NES_CM_STATE_LISTENING: | |
1334 | nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__); | |
1335 | passive_open_err(cm_node, skb, reset); | |
1336 | break; | |
1337 | case NES_CM_STATE_TSA: | |
183ecfa3 FL |
1338 | active_open_err(cm_node, skb, reset); |
1339 | break; | |
1340 | case NES_CM_STATE_CLOSED: | |
1341 | cleanup_retrans_entry(cm_node); | |
1342 | drop_packet(skb); | |
1343 | break; | |
6492cdf3 | 1344 | default: |
183ecfa3 | 1345 | drop_packet(skb); |
6492cdf3 FL |
1346 | break; |
1347 | } | |
1348 | } | |
3c2d774c | 1349 | |
6492cdf3 FL |
1350 | static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1351 | enum nes_cm_event_type type) | |
1352 | { | |
1353 | ||
1354 | int ret; | |
1355 | int datasize = skb->len; | |
1356 | u8 *dataloc = skb->data; | |
1357 | ret = parse_mpa(cm_node, dataloc, datasize); | |
1358 | if (ret < 0) { | |
1359 | nes_debug(NES_DBG_CM, "didn't like MPA Request\n"); | |
1360 | if (type == NES_CM_EVENT_CONNECTED) { | |
1361 | nes_debug(NES_DBG_CM, "%s[%u] create abort for " | |
1362 | "cm_node=%p listener=%p state=%d\n", __func__, | |
1363 | __LINE__, cm_node, cm_node->listener, | |
1364 | cm_node->state); | |
1365 | active_open_err(cm_node, skb, 1); | |
1366 | } else { | |
1367 | passive_open_err(cm_node, skb, 1); | |
3c2d774c | 1368 | } |
6492cdf3 FL |
1369 | } else { |
1370 | cleanup_retrans_entry(cm_node); | |
1371 | dev_kfree_skb_any(skb); | |
1372 | if (type == NES_CM_EVENT_CONNECTED) | |
1373 | cm_node->state = NES_CM_STATE_TSA; | |
183ecfa3 FL |
1374 | else |
1375 | atomic_set(&cm_node->passive_state, | |
1376 | NES_PASSIVE_STATE_INDICATED); | |
6492cdf3 FL |
1377 | create_event(cm_node, type); |
1378 | ||
1379 | } | |
1380 | return ; | |
1381 | } | |
1382 | ||
1383 | static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb) | |
1384 | { | |
1385 | switch (cm_node->state) { | |
1386 | case NES_CM_STATE_SYN_SENT: | |
1387 | case NES_CM_STATE_MPAREQ_SENT: | |
1388 | nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p " | |
1389 | "listener=%p state=%d\n", __func__, __LINE__, cm_node, | |
1390 | cm_node->listener, cm_node->state); | |
1391 | active_open_err(cm_node, skb, 1); | |
1392 | break; | |
1393 | case NES_CM_STATE_ESTABLISHED: | |
1394 | case NES_CM_STATE_SYN_RCVD: | |
1395 | passive_open_err(cm_node, skb, 1); | |
1396 | break; | |
1397 | case NES_CM_STATE_TSA: | |
1398 | default: | |
1399 | drop_packet(skb); | |
3c2d774c | 1400 | } |
6492cdf3 FL |
1401 | } |
1402 | ||
1403 | static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph, | |
1404 | struct sk_buff *skb) | |
1405 | { | |
1406 | int err; | |
1407 | ||
1408 | err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1; | |
1409 | if (err) | |
1410 | active_open_err(cm_node, skb, 1); | |
1411 | ||
1412 | return err; | |
1413 | } | |
1414 | ||
1415 | static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph, | |
1416 | struct sk_buff *skb) | |
1417 | { | |
1418 | int err = 0; | |
1419 | u32 seq; | |
1420 | u32 ack_seq; | |
1421 | u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; | |
1422 | u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; | |
1423 | u32 rcv_wnd; | |
1424 | seq = ntohl(tcph->seq); | |
1425 | ack_seq = ntohl(tcph->ack_seq); | |
1426 | rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; | |
1427 | if (ack_seq != loc_seq_num) | |
1428 | err = 1; | |
1429 | else if ((seq + rcv_wnd) < rcv_nxt) | |
1430 | err = 1; | |
1431 | if (err) { | |
1432 | nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p " | |
1433 | "listener=%p state=%d\n", __func__, __LINE__, cm_node, | |
1434 | cm_node->listener, cm_node->state); | |
1435 | indicate_pkt_err(cm_node, skb); | |
1436 | nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X " | |
1437 | "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt, | |
1438 | rcv_wnd); | |
1439 | } | |
1440 | return err; | |
1441 | } | |
1442 | ||
1443 | /* | |
1444 | * handle_syn_pkt() is for Passive node. The syn packet is received when a node | |
1445 | * is created with a listener or it may comein as rexmitted packet which in | |
1446 | * that case will be just dropped. | |
1447 | */ | |
1448 | ||
1449 | static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
1450 | struct tcphdr *tcph) | |
1451 | { | |
1452 | int ret; | |
1453 | u32 inc_sequence; | |
1454 | int optionsize; | |
3c2d774c GS |
1455 | |
1456 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); | |
abb77256 | 1457 | skb_trim(skb, 0); |
6492cdf3 | 1458 | inc_sequence = ntohl(tcph->seq); |
3c2d774c | 1459 | |
6492cdf3 FL |
1460 | switch (cm_node->state) { |
1461 | case NES_CM_STATE_SYN_SENT: | |
1462 | case NES_CM_STATE_MPAREQ_SENT: | |
1463 | /* Rcvd syn on active open connection*/ | |
1464 | active_open_err(cm_node, skb, 1); | |
1465 | break; | |
1466 | case NES_CM_STATE_LISTENING: | |
1467 | /* Passive OPEN */ | |
1468 | cm_node->accept_pend = 1; | |
1469 | atomic_inc(&cm_node->listener->pend_accepts_cnt); | |
1470 | if (atomic_read(&cm_node->listener->pend_accepts_cnt) > | |
1471 | cm_node->listener->backlog) { | |
1472 | nes_debug(NES_DBG_CM, "drop syn due to backlog " | |
1473 | "pressure \n"); | |
1474 | cm_backlog_drops++; | |
1475 | passive_open_err(cm_node, skb, 0); | |
1476 | break; | |
1477 | } | |
1478 | ret = handle_tcp_options(cm_node, tcph, skb, optionsize, | |
1479 | 1); | |
1480 | if (ret) { | |
1481 | passive_open_err(cm_node, skb, 0); | |
1482 | /* drop pkt */ | |
1483 | break; | |
1484 | } | |
1485 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; | |
1486 | BUG_ON(cm_node->send_entry); | |
1487 | cm_node->state = NES_CM_STATE_SYN_RCVD; | |
1488 | send_syn(cm_node, 1, skb); | |
1489 | break; | |
abb77256 FL |
1490 | case NES_CM_STATE_CLOSED: |
1491 | cleanup_retrans_entry(cm_node); | |
1492 | send_reset(cm_node, skb); | |
1493 | break; | |
6492cdf3 FL |
1494 | case NES_CM_STATE_TSA: |
1495 | case NES_CM_STATE_ESTABLISHED: | |
1496 | case NES_CM_STATE_FIN_WAIT1: | |
1497 | case NES_CM_STATE_FIN_WAIT2: | |
1498 | case NES_CM_STATE_MPAREQ_RCVD: | |
1499 | case NES_CM_STATE_LAST_ACK: | |
1500 | case NES_CM_STATE_CLOSING: | |
1501 | case NES_CM_STATE_UNKNOWN: | |
6492cdf3 FL |
1502 | default: |
1503 | drop_packet(skb); | |
1504 | break; | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
1509 | struct tcphdr *tcph) | |
1510 | { | |
1511 | ||
1512 | int ret; | |
1513 | u32 inc_sequence; | |
1514 | int optionsize; | |
1515 | ||
1516 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); | |
abb77256 | 1517 | skb_trim(skb, 0); |
6492cdf3 FL |
1518 | inc_sequence = ntohl(tcph->seq); |
1519 | switch (cm_node->state) { | |
1520 | case NES_CM_STATE_SYN_SENT: | |
1521 | /* active open */ | |
1522 | if (check_syn(cm_node, tcph, skb)) | |
1523 | return; | |
1524 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); | |
1525 | /* setup options */ | |
1526 | ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0); | |
1527 | if (ret) { | |
1528 | nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n", | |
1529 | cm_node); | |
1530 | break; | |
1531 | } | |
1532 | cleanup_retrans_entry(cm_node); | |
1533 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; | |
1534 | send_mpa_request(cm_node, skb); | |
1535 | cm_node->state = NES_CM_STATE_MPAREQ_SENT; | |
1536 | break; | |
1537 | case NES_CM_STATE_MPAREQ_RCVD: | |
1538 | /* passive open, so should not be here */ | |
1539 | passive_open_err(cm_node, skb, 1); | |
1540 | break; | |
abb77256 FL |
1541 | case NES_CM_STATE_LISTENING: |
1542 | case NES_CM_STATE_CLOSED: | |
1543 | cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); | |
1544 | cleanup_retrans_entry(cm_node); | |
1545 | send_reset(cm_node, skb); | |
1546 | break; | |
6492cdf3 FL |
1547 | case NES_CM_STATE_ESTABLISHED: |
1548 | case NES_CM_STATE_FIN_WAIT1: | |
1549 | case NES_CM_STATE_FIN_WAIT2: | |
1550 | case NES_CM_STATE_LAST_ACK: | |
1551 | case NES_CM_STATE_TSA: | |
1552 | case NES_CM_STATE_CLOSING: | |
1553 | case NES_CM_STATE_UNKNOWN: | |
6492cdf3 FL |
1554 | case NES_CM_STATE_MPAREQ_SENT: |
1555 | default: | |
1556 | drop_packet(skb); | |
1557 | break; | |
1558 | } | |
1559 | } | |
3c2d774c | 1560 | |
6492cdf3 FL |
1561 | static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1562 | struct tcphdr *tcph) | |
1563 | { | |
1564 | int datasize = 0; | |
1565 | u32 inc_sequence; | |
1566 | u32 rem_seq_ack; | |
1567 | u32 rem_seq; | |
abb77256 FL |
1568 | int ret; |
1569 | int optionsize; | |
1570 | u32 temp_seq = cm_node->tcp_cntxt.loc_seq_num; | |
1571 | ||
1572 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); | |
1573 | cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); | |
1574 | ||
6492cdf3 FL |
1575 | if (check_seq(cm_node, tcph, skb)) |
1576 | return; | |
1577 | ||
1578 | skb_pull(skb, tcph->doff << 2); | |
3c2d774c | 1579 | inc_sequence = ntohl(tcph->seq); |
6492cdf3 FL |
1580 | rem_seq = ntohl(tcph->seq); |
1581 | rem_seq_ack = ntohl(tcph->ack_seq); | |
1582 | datasize = skb->len; | |
1583 | ||
1584 | switch (cm_node->state) { | |
1585 | case NES_CM_STATE_SYN_RCVD: | |
1586 | /* Passive OPEN */ | |
abb77256 FL |
1587 | ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1); |
1588 | if (ret) | |
1589 | break; | |
6492cdf3 | 1590 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
abb77256 FL |
1591 | cm_node->tcp_cntxt.loc_seq_num = temp_seq; |
1592 | if (cm_node->tcp_cntxt.rem_ack_num != | |
1593 | cm_node->tcp_cntxt.loc_seq_num) { | |
1594 | nes_debug(NES_DBG_CM, "rem_ack_num != loc_seq_num\n"); | |
1595 | cleanup_retrans_entry(cm_node); | |
1596 | send_reset(cm_node, skb); | |
1597 | return; | |
1598 | } | |
6492cdf3 FL |
1599 | cm_node->state = NES_CM_STATE_ESTABLISHED; |
1600 | if (datasize) { | |
1601 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; | |
1602 | cm_node->state = NES_CM_STATE_MPAREQ_RCVD; | |
1603 | handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ); | |
1604 | } else { /* rcvd ACK only */ | |
1605 | dev_kfree_skb_any(skb); | |
1606 | cleanup_retrans_entry(cm_node); | |
1607 | } | |
1608 | break; | |
1609 | case NES_CM_STATE_ESTABLISHED: | |
1610 | /* Passive OPEN */ | |
1611 | /* We expect mpa frame to be received only */ | |
1612 | if (datasize) { | |
1613 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; | |
1614 | cm_node->state = NES_CM_STATE_MPAREQ_RCVD; | |
1615 | handle_rcv_mpa(cm_node, skb, | |
1616 | NES_CM_EVENT_MPA_REQ); | |
1617 | } else | |
1618 | drop_packet(skb); | |
1619 | break; | |
1620 | case NES_CM_STATE_MPAREQ_SENT: | |
1621 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); | |
1622 | if (datasize) { | |
1623 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; | |
1624 | handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED); | |
1625 | } else { /* Could be just an ack pkt.. */ | |
1626 | cleanup_retrans_entry(cm_node); | |
1627 | dev_kfree_skb_any(skb); | |
3c2d774c | 1628 | } |
6492cdf3 | 1629 | break; |
abb77256 FL |
1630 | case NES_CM_STATE_LISTENING: |
1631 | case NES_CM_STATE_CLOSED: | |
1632 | cleanup_retrans_entry(cm_node); | |
1633 | send_reset(cm_node, skb); | |
1634 | break; | |
6492cdf3 FL |
1635 | case NES_CM_STATE_FIN_WAIT1: |
1636 | case NES_CM_STATE_SYN_SENT: | |
1637 | case NES_CM_STATE_FIN_WAIT2: | |
1638 | case NES_CM_STATE_TSA: | |
6492cdf3 FL |
1639 | case NES_CM_STATE_MPAREQ_RCVD: |
1640 | case NES_CM_STATE_LAST_ACK: | |
1641 | case NES_CM_STATE_CLOSING: | |
1642 | case NES_CM_STATE_UNKNOWN: | |
1643 | default: | |
1644 | drop_packet(skb); | |
1645 | break; | |
3c2d774c | 1646 | } |
6492cdf3 | 1647 | } |
3c2d774c | 1648 | |
3c2d774c GS |
1649 | |
1650 | ||
6492cdf3 FL |
1651 | static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, |
1652 | struct sk_buff *skb, int optionsize, int passive) | |
1653 | { | |
1654 | u8 *optionsloc = (u8 *)&tcph[1]; | |
3c2d774c | 1655 | if (optionsize) { |
6492cdf3 FL |
1656 | if (process_options(cm_node, optionsloc, optionsize, |
1657 | (u32)tcph->syn)) { | |
1658 | nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n", | |
1659 | __func__, cm_node); | |
1660 | if (passive) | |
abb77256 | 1661 | passive_open_err(cm_node, skb, 1); |
6492cdf3 | 1662 | else |
abb77256 | 1663 | active_open_err(cm_node, skb, 1); |
6492cdf3 | 1664 | return 1; |
3c2d774c | 1665 | } |
6492cdf3 | 1666 | } |
3c2d774c GS |
1667 | |
1668 | cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << | |
1669 | cm_node->tcp_cntxt.snd_wscale; | |
1670 | ||
6492cdf3 | 1671 | if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) |
3c2d774c | 1672 | cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; |
6492cdf3 FL |
1673 | return 0; |
1674 | } | |
3c2d774c | 1675 | |
6492cdf3 FL |
1676 | /* |
1677 | * active_open_err() will send reset() if flag set.. | |
1678 | * It will also send ABORT event. | |
1679 | */ | |
3c2d774c | 1680 | |
6492cdf3 FL |
1681 | static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1682 | int reset) | |
1683 | { | |
1684 | cleanup_retrans_entry(cm_node); | |
1685 | if (reset) { | |
1686 | nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, " | |
1687 | "state=%d\n", cm_node, cm_node->state); | |
1688 | add_ref_cm_node(cm_node); | |
1689 | send_reset(cm_node, skb); | |
1690 | } else | |
1691 | dev_kfree_skb_any(skb); | |
3c2d774c | 1692 | |
6492cdf3 FL |
1693 | cm_node->state = NES_CM_STATE_CLOSED; |
1694 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
1695 | } | |
3c2d774c | 1696 | |
6492cdf3 FL |
1697 | /* |
1698 | * passive_open_err() will either do a reset() or will free up the skb and | |
1699 | * remove the cm_node. | |
1700 | */ | |
3c2d774c | 1701 | |
6492cdf3 FL |
1702 | static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1703 | int reset) | |
1704 | { | |
1705 | cleanup_retrans_entry(cm_node); | |
1706 | cm_node->state = NES_CM_STATE_CLOSED; | |
1707 | if (reset) { | |
1708 | nes_debug(NES_DBG_CM, "passive_open_err sending RST for " | |
1709 | "cm_node=%p state =%d\n", cm_node, cm_node->state); | |
1710 | send_reset(cm_node, skb); | |
1711 | } else { | |
1712 | dev_kfree_skb_any(skb); | |
1713 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
3c2d774c | 1714 | } |
6492cdf3 | 1715 | } |
3c2d774c | 1716 | |
6492cdf3 FL |
1717 | /* |
1718 | * free_retrans_entry() routines assumes that the retrans_list_lock has | |
1719 | * been acquired before calling. | |
1720 | */ | |
1721 | static void free_retrans_entry(struct nes_cm_node *cm_node) | |
1722 | { | |
1723 | struct nes_timer_entry *send_entry; | |
1724 | send_entry = cm_node->send_entry; | |
1725 | if (send_entry) { | |
1726 | cm_node->send_entry = NULL; | |
1727 | dev_kfree_skb_any(send_entry->skb); | |
1728 | kfree(send_entry); | |
1729 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
3c2d774c | 1730 | } |
6492cdf3 | 1731 | } |
3c2d774c | 1732 | |
6492cdf3 FL |
1733 | static void cleanup_retrans_entry(struct nes_cm_node *cm_node) |
1734 | { | |
1735 | unsigned long flags; | |
3c2d774c | 1736 | |
6492cdf3 FL |
1737 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
1738 | free_retrans_entry(cm_node); | |
1739 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
3c2d774c GS |
1740 | } |
1741 | ||
6492cdf3 FL |
1742 | /** |
1743 | * process_packet | |
1744 | * Returns skb if to be freed, else it will return NULL if already used.. | |
1745 | */ | |
1746 | static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
1747 | struct nes_cm_core *cm_core) | |
1748 | { | |
1749 | enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN; | |
1750 | struct tcphdr *tcph = tcp_hdr(skb); | |
1751 | skb_pull(skb, ip_hdr(skb)->ihl << 2); | |
1752 | ||
1753 | nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d " | |
1754 | "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn, | |
1755 | tcph->ack, tcph->rst, tcph->fin); | |
1756 | ||
1757 | if (tcph->rst) | |
1758 | pkt_type = NES_PKT_TYPE_RST; | |
1759 | else if (tcph->syn) { | |
1760 | pkt_type = NES_PKT_TYPE_SYN; | |
1761 | if (tcph->ack) | |
1762 | pkt_type = NES_PKT_TYPE_SYNACK; | |
1763 | } else if (tcph->fin) | |
1764 | pkt_type = NES_PKT_TYPE_FIN; | |
1765 | else if (tcph->ack) | |
1766 | pkt_type = NES_PKT_TYPE_ACK; | |
1767 | ||
1768 | switch (pkt_type) { | |
1769 | case NES_PKT_TYPE_SYN: | |
1770 | handle_syn_pkt(cm_node, skb, tcph); | |
1771 | break; | |
1772 | case NES_PKT_TYPE_SYNACK: | |
1773 | handle_synack_pkt(cm_node, skb, tcph); | |
1774 | break; | |
1775 | case NES_PKT_TYPE_ACK: | |
1776 | handle_ack_pkt(cm_node, skb, tcph); | |
1777 | break; | |
1778 | case NES_PKT_TYPE_RST: | |
1779 | handle_rst_pkt(cm_node, skb, tcph); | |
1780 | break; | |
1781 | case NES_PKT_TYPE_FIN: | |
1782 | handle_fin_pkt(cm_node, skb, tcph); | |
1783 | break; | |
1784 | default: | |
1785 | drop_packet(skb); | |
1786 | break; | |
1787 | } | |
1788 | } | |
3c2d774c GS |
1789 | |
1790 | /** | |
1791 | * mini_cm_listen - create a listen node with params | |
1792 | */ | |
1793 | static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core, | |
6492cdf3 | 1794 | struct nes_vnic *nesvnic, struct nes_cm_info *cm_info) |
3c2d774c GS |
1795 | { |
1796 | struct nes_cm_listener *listener; | |
1797 | unsigned long flags; | |
1798 | ||
1799 | nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n", | |
1800 | cm_info->loc_addr, cm_info->loc_port); | |
1801 | ||
1802 | /* cannot have multiple matching listeners */ | |
1803 | listener = find_listener(cm_core, htonl(cm_info->loc_addr), | |
1804 | htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE); | |
1805 | if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) { | |
1806 | /* find automatically incs ref count ??? */ | |
1807 | atomic_dec(&listener->ref_count); | |
1808 | nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n"); | |
1809 | return NULL; | |
1810 | } | |
1811 | ||
1812 | if (!listener) { | |
1813 | /* create a CM listen node (1/2 node to compare incoming traffic to) */ | |
1814 | listener = kzalloc(sizeof(*listener), GFP_ATOMIC); | |
1815 | if (!listener) { | |
1816 | nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n"); | |
1817 | return NULL; | |
1818 | } | |
1819 | ||
3c2d774c GS |
1820 | listener->loc_addr = htonl(cm_info->loc_addr); |
1821 | listener->loc_port = htons(cm_info->loc_port); | |
1822 | listener->reused_node = 0; | |
1823 | ||
1824 | atomic_set(&listener->ref_count, 1); | |
1825 | } | |
1826 | /* pasive case */ | |
1827 | /* find already inc'ed the ref count */ | |
1828 | else { | |
1829 | listener->reused_node = 1; | |
1830 | } | |
1831 | ||
1832 | listener->cm_id = cm_info->cm_id; | |
1833 | atomic_set(&listener->pend_accepts_cnt, 0); | |
1834 | listener->cm_core = cm_core; | |
1835 | listener->nesvnic = nesvnic; | |
1836 | atomic_inc(&cm_core->node_cnt); | |
3c2d774c | 1837 | |
3c2d774c GS |
1838 | listener->conn_type = cm_info->conn_type; |
1839 | listener->backlog = cm_info->backlog; | |
1840 | listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE; | |
1841 | ||
1842 | if (!listener->reused_node) { | |
1843 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); | |
1844 | list_add(&listener->list, &cm_core->listen_list.list); | |
1845 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
1846 | atomic_inc(&cm_core->listen_node_cnt); | |
1847 | } | |
1848 | ||
1849 | nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x," | |
1850 | " listener = %p, backlog = %d, cm_id = %p.\n", | |
1851 | cm_info->loc_addr, cm_info->loc_port, | |
1852 | listener, listener->backlog, listener->cm_id); | |
1853 | ||
1854 | return listener; | |
1855 | } | |
1856 | ||
1857 | ||
1858 | /** | |
1859 | * mini_cm_connect - make a connection node with params | |
1860 | */ | |
54c86a8c | 1861 | static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core, |
6492cdf3 FL |
1862 | struct nes_vnic *nesvnic, u16 private_data_len, |
1863 | void *private_data, struct nes_cm_info *cm_info) | |
3c2d774c GS |
1864 | { |
1865 | int ret = 0; | |
1866 | struct nes_cm_node *cm_node; | |
1867 | struct nes_cm_listener *loopbackremotelistener; | |
1868 | struct nes_cm_node *loopbackremotenode; | |
1869 | struct nes_cm_info loopback_cm_info; | |
6492cdf3 FL |
1870 | u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len; |
1871 | struct ietf_mpa_frame *mpa_frame = NULL; | |
3c2d774c GS |
1872 | |
1873 | /* create a CM connection node */ | |
1874 | cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL); | |
1875 | if (!cm_node) | |
1876 | return NULL; | |
6492cdf3 FL |
1877 | mpa_frame = &cm_node->mpa_frame; |
1878 | strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ); | |
1879 | mpa_frame->flags = IETF_MPA_FLAGS_CRC; | |
1880 | mpa_frame->rev = IETF_MPA_VERSION; | |
1881 | mpa_frame->priv_data_len = htons(private_data_len); | |
3c2d774c | 1882 | |
7495ab68 | 1883 | /* set our node side to client (active) side */ |
3c2d774c GS |
1884 | cm_node->tcp_cntxt.client = 1; |
1885 | cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; | |
1886 | ||
1887 | if (cm_info->loc_addr == cm_info->rem_addr) { | |
6492cdf3 FL |
1888 | loopbackremotelistener = find_listener(cm_core, |
1889 | ntohl(nesvnic->local_ipaddr), cm_node->rem_port, | |
1890 | NES_CM_LISTENER_ACTIVE_STATE); | |
3c2d774c GS |
1891 | if (loopbackremotelistener == NULL) { |
1892 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
1893 | } else { | |
1894 | atomic_inc(&cm_loopbacks); | |
1895 | loopback_cm_info = *cm_info; | |
1896 | loopback_cm_info.loc_port = cm_info->rem_port; | |
1897 | loopback_cm_info.rem_port = cm_info->loc_port; | |
1898 | loopback_cm_info.cm_id = loopbackremotelistener->cm_id; | |
6492cdf3 FL |
1899 | loopbackremotenode = make_cm_node(cm_core, nesvnic, |
1900 | &loopback_cm_info, loopbackremotelistener); | |
3c2d774c | 1901 | loopbackremotenode->loopbackpartner = cm_node; |
6492cdf3 FL |
1902 | loopbackremotenode->tcp_cntxt.rcv_wscale = |
1903 | NES_CM_DEFAULT_RCV_WND_SCALE; | |
3c2d774c | 1904 | cm_node->loopbackpartner = loopbackremotenode; |
6492cdf3 FL |
1905 | memcpy(loopbackremotenode->mpa_frame_buf, private_data, |
1906 | private_data_len); | |
1907 | loopbackremotenode->mpa_frame_size = private_data_len; | |
3c2d774c | 1908 | |
6492cdf3 FL |
1909 | /* we are done handling this state. */ |
1910 | /* set node to a TSA state */ | |
3c2d774c | 1911 | cm_node->state = NES_CM_STATE_TSA; |
6492cdf3 FL |
1912 | cm_node->tcp_cntxt.rcv_nxt = |
1913 | loopbackremotenode->tcp_cntxt.loc_seq_num; | |
1914 | loopbackremotenode->tcp_cntxt.rcv_nxt = | |
1915 | cm_node->tcp_cntxt.loc_seq_num; | |
1916 | cm_node->tcp_cntxt.max_snd_wnd = | |
1917 | loopbackremotenode->tcp_cntxt.rcv_wnd; | |
1918 | loopbackremotenode->tcp_cntxt.max_snd_wnd = | |
1919 | cm_node->tcp_cntxt.rcv_wnd; | |
1920 | cm_node->tcp_cntxt.snd_wnd = | |
1921 | loopbackremotenode->tcp_cntxt.rcv_wnd; | |
1922 | loopbackremotenode->tcp_cntxt.snd_wnd = | |
1923 | cm_node->tcp_cntxt.rcv_wnd; | |
1924 | cm_node->tcp_cntxt.snd_wscale = | |
1925 | loopbackremotenode->tcp_cntxt.rcv_wscale; | |
1926 | loopbackremotenode->tcp_cntxt.snd_wscale = | |
1927 | cm_node->tcp_cntxt.rcv_wscale; | |
3c2d774c GS |
1928 | |
1929 | create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ); | |
1930 | } | |
1931 | return cm_node; | |
1932 | } | |
1933 | ||
1934 | /* set our node side to client (active) side */ | |
1935 | cm_node->tcp_cntxt.client = 1; | |
1936 | /* init our MPA frame ptr */ | |
6492cdf3 FL |
1937 | memcpy(mpa_frame->priv_data, private_data, private_data_len); |
1938 | ||
3c2d774c GS |
1939 | cm_node->mpa_frame_size = mpa_frame_size; |
1940 | ||
1941 | /* send a syn and goto syn sent state */ | |
1942 | cm_node->state = NES_CM_STATE_SYN_SENT; | |
6492cdf3 FL |
1943 | ret = send_syn(cm_node, 0, NULL); |
1944 | ||
1945 | if (ret) { | |
1946 | /* error in sending the syn free up the cm_node struct */ | |
1947 | nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest " | |
1948 | "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n", | |
1949 | cm_node->rem_addr, cm_node->rem_port, cm_node, | |
1950 | cm_node->cm_id); | |
1951 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
1952 | cm_node = NULL; | |
1953 | } | |
3c2d774c | 1954 | |
6492cdf3 FL |
1955 | if (cm_node) |
1956 | nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X," | |
1957 | "port=0x%04x, cm_node=%p, cm_id = %p.\n", | |
1958 | cm_node->rem_addr, cm_node->rem_port, cm_node, | |
1959 | cm_node->cm_id); | |
3c2d774c GS |
1960 | |
1961 | return cm_node; | |
1962 | } | |
1963 | ||
1964 | ||
1965 | /** | |
1966 | * mini_cm_accept - accept a connection | |
1967 | * This function is never called | |
1968 | */ | |
6492cdf3 FL |
1969 | static int mini_cm_accept(struct nes_cm_core *cm_core, |
1970 | struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node) | |
3c2d774c GS |
1971 | { |
1972 | return 0; | |
1973 | } | |
1974 | ||
1975 | ||
1976 | /** | |
1977 | * mini_cm_reject - reject and teardown a connection | |
1978 | */ | |
1a855fbf | 1979 | static int mini_cm_reject(struct nes_cm_core *cm_core, |
6492cdf3 | 1980 | struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node) |
3c2d774c GS |
1981 | { |
1982 | int ret = 0; | |
183ecfa3 | 1983 | int passive_state; |
3c2d774c | 1984 | |
6492cdf3 FL |
1985 | nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n", |
1986 | __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state); | |
3c2d774c | 1987 | |
6492cdf3 FL |
1988 | if (cm_node->tcp_cntxt.client) |
1989 | return ret; | |
1990 | cleanup_retrans_entry(cm_node); | |
3c2d774c | 1991 | |
183ecfa3 FL |
1992 | passive_state = atomic_add_return(1, &cm_node->passive_state); |
1993 | cm_node->state = NES_CM_STATE_CLOSED; | |
1994 | if (passive_state == NES_SEND_RESET_EVENT) | |
1995 | rem_ref_cm_node(cm_core, cm_node); | |
1996 | else | |
1997 | ret = send_reset(cm_node, NULL); | |
3c2d774c GS |
1998 | return ret; |
1999 | } | |
2000 | ||
2001 | ||
2002 | /** | |
2003 | * mini_cm_close | |
2004 | */ | |
1a855fbf | 2005 | static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node) |
3c2d774c GS |
2006 | { |
2007 | int ret = 0; | |
2008 | ||
2009 | if (!cm_core || !cm_node) | |
2010 | return -EINVAL; | |
2011 | ||
2012 | switch (cm_node->state) { | |
6492cdf3 FL |
2013 | case NES_CM_STATE_SYN_RCVD: |
2014 | case NES_CM_STATE_SYN_SENT: | |
2015 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: | |
2016 | case NES_CM_STATE_ESTABLISHED: | |
2017 | case NES_CM_STATE_ACCEPTING: | |
2018 | case NES_CM_STATE_MPAREQ_SENT: | |
2019 | case NES_CM_STATE_MPAREQ_RCVD: | |
2020 | cleanup_retrans_entry(cm_node); | |
2021 | send_reset(cm_node, NULL); | |
2022 | break; | |
2023 | case NES_CM_STATE_CLOSE_WAIT: | |
2024 | cm_node->state = NES_CM_STATE_LAST_ACK; | |
2025 | send_fin(cm_node, NULL); | |
2026 | break; | |
2027 | case NES_CM_STATE_FIN_WAIT1: | |
2028 | case NES_CM_STATE_FIN_WAIT2: | |
2029 | case NES_CM_STATE_LAST_ACK: | |
2030 | case NES_CM_STATE_TIME_WAIT: | |
2031 | case NES_CM_STATE_CLOSING: | |
2032 | ret = -1; | |
2033 | break; | |
2034 | case NES_CM_STATE_LISTENING: | |
2035 | case NES_CM_STATE_UNKNOWN: | |
2036 | case NES_CM_STATE_INITED: | |
2037 | case NES_CM_STATE_CLOSED: | |
2038 | ret = rem_ref_cm_node(cm_core, cm_node); | |
2039 | break; | |
2040 | case NES_CM_STATE_TSA: | |
2041 | if (cm_node->send_entry) | |
2042 | printk(KERN_ERR "ERROR Close got called from STATE_TSA " | |
2043 | "send_entry=%p\n", cm_node->send_entry); | |
2044 | ret = rem_ref_cm_node(cm_core, cm_node); | |
2045 | break; | |
3c2d774c | 2046 | } |
3c2d774c GS |
2047 | return ret; |
2048 | } | |
2049 | ||
2050 | ||
2051 | /** | |
2052 | * recv_pkt - recv an ETHERNET packet, and process it through CM | |
2053 | * node state machine | |
2054 | */ | |
4a14f6a7 | 2055 | static int mini_cm_recv_pkt(struct nes_cm_core *cm_core, |
6492cdf3 | 2056 | struct nes_vnic *nesvnic, struct sk_buff *skb) |
3c2d774c GS |
2057 | { |
2058 | struct nes_cm_node *cm_node = NULL; | |
2059 | struct nes_cm_listener *listener = NULL; | |
2060 | struct iphdr *iph; | |
2061 | struct tcphdr *tcph; | |
2062 | struct nes_cm_info nfo; | |
4a14f6a7 | 2063 | int skb_handled = 1; |
03080e5c | 2064 | __be32 tmp_daddr, tmp_saddr; |
3c2d774c | 2065 | |
6492cdf3 | 2066 | if (!skb) |
4a14f6a7 | 2067 | return 0; |
6492cdf3 | 2068 | if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) { |
4a14f6a7 | 2069 | return 0; |
3c2d774c GS |
2070 | } |
2071 | ||
2072 | iph = (struct iphdr *)skb->data; | |
2073 | tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr)); | |
3c2d774c GS |
2074 | |
2075 | nfo.loc_addr = ntohl(iph->daddr); | |
2076 | nfo.loc_port = ntohs(tcph->dest); | |
2077 | nfo.rem_addr = ntohl(iph->saddr); | |
2078 | nfo.rem_port = ntohs(tcph->source); | |
2079 | ||
03080e5c HH |
2080 | tmp_daddr = cpu_to_be32(iph->daddr); |
2081 | tmp_saddr = cpu_to_be32(iph->saddr); | |
2082 | ||
63779436 | 2083 | nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n", |
03080e5c | 2084 | &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source); |
3c2d774c | 2085 | |
6492cdf3 FL |
2086 | do { |
2087 | cm_node = find_node(cm_core, | |
3c2d774c GS |
2088 | nfo.rem_port, nfo.rem_addr, |
2089 | nfo.loc_port, nfo.loc_addr); | |
2090 | ||
3c2d774c | 2091 | if (!cm_node) { |
6492cdf3 FL |
2092 | /* Only type of packet accepted are for */ |
2093 | /* the PASSIVE open (syn only) */ | |
2094 | if ((!tcph->syn) || (tcph->ack)) { | |
4a14f6a7 | 2095 | skb_handled = 0; |
6492cdf3 FL |
2096 | break; |
2097 | } | |
2098 | listener = find_listener(cm_core, nfo.loc_addr, | |
2099 | nfo.loc_port, | |
2100 | NES_CM_LISTENER_ACTIVE_STATE); | |
4a14f6a7 FL |
2101 | if (!listener) { |
2102 | nfo.cm_id = NULL; | |
2103 | nfo.conn_type = 0; | |
2104 | nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n"); | |
2105 | skb_handled = 0; | |
6492cdf3 FL |
2106 | break; |
2107 | } | |
4a14f6a7 FL |
2108 | nfo.cm_id = listener->cm_id; |
2109 | nfo.conn_type = listener->conn_type; | |
6492cdf3 FL |
2110 | cm_node = make_cm_node(cm_core, nesvnic, &nfo, |
2111 | listener); | |
2112 | if (!cm_node) { | |
2113 | nes_debug(NES_DBG_CM, "Unable to allocate " | |
2114 | "node\n"); | |
2115 | cm_packets_dropped++; | |
3c2d774c | 2116 | atomic_dec(&listener->ref_count); |
6492cdf3 FL |
2117 | dev_kfree_skb_any(skb); |
2118 | break; | |
3c2d774c | 2119 | } |
6492cdf3 FL |
2120 | if (!tcph->rst && !tcph->fin) { |
2121 | cm_node->state = NES_CM_STATE_LISTENING; | |
2122 | } else { | |
2123 | cm_packets_dropped++; | |
2124 | rem_ref_cm_node(cm_core, cm_node); | |
2125 | dev_kfree_skb_any(skb); | |
2126 | break; | |
3c2d774c | 2127 | } |
6492cdf3 FL |
2128 | add_ref_cm_node(cm_node); |
2129 | } else if (cm_node->state == NES_CM_STATE_TSA) { | |
3c2d774c | 2130 | rem_ref_cm_node(cm_core, cm_node); |
6492cdf3 FL |
2131 | atomic_inc(&cm_accel_dropped_pkts); |
2132 | dev_kfree_skb_any(skb); | |
2133 | break; | |
3c2d774c | 2134 | } |
4a14f6a7 FL |
2135 | skb_reset_network_header(skb); |
2136 | skb_set_transport_header(skb, sizeof(*tcph)); | |
2137 | skb->len = ntohs(iph->tot_len); | |
6492cdf3 FL |
2138 | process_packet(cm_node, skb, cm_core); |
2139 | rem_ref_cm_node(cm_core, cm_node); | |
2140 | } while (0); | |
4a14f6a7 | 2141 | return skb_handled; |
3c2d774c GS |
2142 | } |
2143 | ||
2144 | ||
2145 | /** | |
2146 | * nes_cm_alloc_core - allocate a top level instance of a cm core | |
2147 | */ | |
1a855fbf | 2148 | static struct nes_cm_core *nes_cm_alloc_core(void) |
3c2d774c | 2149 | { |
3c2d774c | 2150 | struct nes_cm_core *cm_core; |
3c2d774c GS |
2151 | |
2152 | /* setup the CM core */ | |
2153 | /* alloc top level core control structure */ | |
2154 | cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL); | |
2155 | if (!cm_core) | |
2156 | return NULL; | |
2157 | ||
2158 | INIT_LIST_HEAD(&cm_core->connected_nodes); | |
2159 | init_timer(&cm_core->tcp_timer); | |
2160 | cm_core->tcp_timer.function = nes_cm_timer_tick; | |
2161 | ||
2162 | cm_core->mtu = NES_CM_DEFAULT_MTU; | |
2163 | cm_core->state = NES_CM_STATE_INITED; | |
2164 | cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS; | |
2165 | ||
3c2d774c GS |
2166 | atomic_set(&cm_core->events_posted, 0); |
2167 | ||
3c2d774c GS |
2168 | cm_core->api = &nes_cm_api; |
2169 | ||
2170 | spin_lock_init(&cm_core->ht_lock); | |
2171 | spin_lock_init(&cm_core->listen_list_lock); | |
2172 | ||
2173 | INIT_LIST_HEAD(&cm_core->listen_list.list); | |
2174 | ||
2175 | nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core); | |
2176 | ||
2177 | nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n"); | |
2178 | cm_core->event_wq = create_singlethread_workqueue("nesewq"); | |
2179 | cm_core->post_event = nes_cm_post_event; | |
2180 | nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n"); | |
2181 | cm_core->disconn_wq = create_singlethread_workqueue("nesdwq"); | |
2182 | ||
2183 | print_core(cm_core); | |
2184 | return cm_core; | |
2185 | } | |
2186 | ||
2187 | ||
2188 | /** | |
2189 | * mini_cm_dealloc_core - deallocate a top level instance of a cm core | |
2190 | */ | |
1a855fbf | 2191 | static int mini_cm_dealloc_core(struct nes_cm_core *cm_core) |
3c2d774c GS |
2192 | { |
2193 | nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core); | |
2194 | ||
2195 | if (!cm_core) | |
2196 | return -EINVAL; | |
2197 | ||
2198 | barrier(); | |
2199 | ||
2200 | if (timer_pending(&cm_core->tcp_timer)) { | |
2201 | del_timer(&cm_core->tcp_timer); | |
2202 | } | |
2203 | ||
2204 | destroy_workqueue(cm_core->event_wq); | |
2205 | destroy_workqueue(cm_core->disconn_wq); | |
2206 | nes_debug(NES_DBG_CM, "\n"); | |
2207 | kfree(cm_core); | |
2208 | ||
2209 | return 0; | |
2210 | } | |
2211 | ||
2212 | ||
2213 | /** | |
2214 | * mini_cm_get | |
2215 | */ | |
1a855fbf | 2216 | static int mini_cm_get(struct nes_cm_core *cm_core) |
3c2d774c GS |
2217 | { |
2218 | return cm_core->state; | |
2219 | } | |
2220 | ||
2221 | ||
2222 | /** | |
2223 | * mini_cm_set | |
2224 | */ | |
1a855fbf | 2225 | static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value) |
3c2d774c GS |
2226 | { |
2227 | int ret = 0; | |
2228 | ||
2229 | switch (type) { | |
2230 | case NES_CM_SET_PKT_SIZE: | |
2231 | cm_core->mtu = value; | |
2232 | break; | |
2233 | case NES_CM_SET_FREE_PKT_Q_SIZE: | |
2234 | cm_core->free_tx_pkt_max = value; | |
2235 | break; | |
2236 | default: | |
2237 | /* unknown set option */ | |
2238 | ret = -EINVAL; | |
2239 | } | |
2240 | ||
2241 | return ret; | |
2242 | } | |
2243 | ||
2244 | ||
2245 | /** | |
2246 | * nes_cm_init_tsa_conn setup HW; MPA frames must be | |
2247 | * successfully exchanged when this is called | |
2248 | */ | |
2249 | static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node) | |
2250 | { | |
2251 | int ret = 0; | |
2252 | ||
2253 | if (!nesqp) | |
2254 | return -EINVAL; | |
2255 | ||
2256 | nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 | | |
2257 | NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG | | |
2258 | NES_QPCONTEXT_MISC_DROS); | |
2259 | ||
2260 | if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale) | |
2261 | nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE); | |
2262 | ||
2263 | nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT); | |
2264 | ||
2265 | nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16); | |
2266 | ||
2267 | nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32( | |
2268 | (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT); | |
2269 | ||
2270 | nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32( | |
2271 | (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) & | |
2272 | NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK); | |
2273 | ||
2274 | nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32( | |
2275 | (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) & | |
2276 | NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK); | |
2277 | ||
2278 | nesqp->nesqp_context->keepalive = cpu_to_le32(0x80); | |
2279 | nesqp->nesqp_context->ts_recent = 0; | |
2280 | nesqp->nesqp_context->ts_age = 0; | |
2281 | nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2282 | nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); | |
2283 | nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); | |
2284 | nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << | |
2285 | cm_node->tcp_cntxt.rcv_wscale); | |
2286 | nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2287 | nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2288 | nesqp->nesqp_context->srtt = 0; | |
2289 | nesqp->nesqp_context->rttvar = cpu_to_le32(0x6); | |
2290 | nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000); | |
2291 | nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss); | |
2292 | nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); | |
2293 | nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2294 | nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); | |
2295 | ||
2296 | nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X," | |
2297 | " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n", | |
2298 | nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt), | |
2299 | le32_to_cpu(nesqp->nesqp_context->snd_nxt), | |
2300 | cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale), | |
2301 | le32_to_cpu(nesqp->nesqp_context->rcv_wnd), | |
2302 | le32_to_cpu(nesqp->nesqp_context->misc)); | |
2303 | nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd)); | |
2304 | nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd)); | |
2305 | nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd)); | |
2306 | ||
2307 | nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n"); | |
2308 | cm_node->state = NES_CM_STATE_TSA; | |
2309 | ||
2310 | return ret; | |
2311 | } | |
2312 | ||
2313 | ||
2314 | /** | |
2315 | * nes_cm_disconn | |
2316 | */ | |
2317 | int nes_cm_disconn(struct nes_qp *nesqp) | |
2318 | { | |
2319 | unsigned long flags; | |
2320 | ||
2321 | spin_lock_irqsave(&nesqp->lock, flags); | |
2322 | if (nesqp->disconn_pending == 0) { | |
2323 | nesqp->disconn_pending++; | |
2324 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
3c2d774c GS |
2325 | /* init our disconnect work element, to */ |
2326 | INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker); | |
2327 | ||
2328 | queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work); | |
6492cdf3 | 2329 | } else |
3c2d774c | 2330 | spin_unlock_irqrestore(&nesqp->lock, flags); |
3c2d774c GS |
2331 | |
2332 | return 0; | |
2333 | } | |
2334 | ||
2335 | ||
2336 | /** | |
2337 | * nes_disconnect_worker | |
2338 | */ | |
1a855fbf | 2339 | static void nes_disconnect_worker(struct work_struct *work) |
3c2d774c GS |
2340 | { |
2341 | struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work); | |
2342 | ||
2343 | nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n", | |
2344 | nesqp->last_aeq, nesqp->hwqp.qp_id); | |
2345 | nes_cm_disconn_true(nesqp); | |
2346 | } | |
2347 | ||
2348 | ||
2349 | /** | |
2350 | * nes_cm_disconn_true | |
2351 | */ | |
1a855fbf | 2352 | static int nes_cm_disconn_true(struct nes_qp *nesqp) |
3c2d774c GS |
2353 | { |
2354 | unsigned long flags; | |
2355 | int ret = 0; | |
2356 | struct iw_cm_id *cm_id; | |
2357 | struct iw_cm_event cm_event; | |
2358 | struct nes_vnic *nesvnic; | |
2359 | u16 last_ae; | |
2360 | u8 original_hw_tcp_state; | |
2361 | u8 original_ibqp_state; | |
2362 | u8 issued_disconnect_reset = 0; | |
2363 | ||
2364 | if (!nesqp) { | |
2365 | nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n"); | |
2366 | return -1; | |
2367 | } | |
2368 | ||
2369 | spin_lock_irqsave(&nesqp->lock, flags); | |
2370 | cm_id = nesqp->cm_id; | |
2371 | /* make sure we havent already closed this connection */ | |
2372 | if (!cm_id) { | |
2373 | nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n", | |
2374 | nesqp->hwqp.qp_id); | |
2375 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
3c2d774c GS |
2376 | return -1; |
2377 | } | |
2378 | ||
2379 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2380 | nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id); | |
2381 | ||
2382 | original_hw_tcp_state = nesqp->hw_tcp_state; | |
2383 | original_ibqp_state = nesqp->ibqp_state; | |
2384 | last_ae = nesqp->last_aeq; | |
2385 | ||
2386 | ||
2387 | nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state); | |
2388 | ||
2389 | if ((nesqp->cm_id) && (cm_id->event_handler)) { | |
2390 | if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) || | |
2391 | ((original_ibqp_state == IB_QPS_RTS) && | |
2392 | (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) { | |
2393 | atomic_inc(&cm_disconnects); | |
2394 | cm_event.event = IW_CM_EVENT_DISCONNECT; | |
2395 | if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) { | |
3c2d774c | 2396 | cm_event.status = IW_CM_EVENT_STATUS_RESET; |
6492cdf3 FL |
2397 | nes_debug(NES_DBG_CM, "Generating a CM " |
2398 | "Disconnect Event (status reset) for " | |
2399 | "QP%u, cm_id = %p. \n", | |
2400 | nesqp->hwqp.qp_id, cm_id); | |
2401 | } else | |
3c2d774c | 2402 | cm_event.status = IW_CM_EVENT_STATUS_OK; |
3c2d774c GS |
2403 | |
2404 | cm_event.local_addr = cm_id->local_addr; | |
2405 | cm_event.remote_addr = cm_id->remote_addr; | |
2406 | cm_event.private_data = NULL; | |
2407 | cm_event.private_data_len = 0; | |
2408 | ||
6492cdf3 FL |
2409 | nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event" |
2410 | " for QP%u, SQ Head = %u, SQ Tail = %u. " | |
2411 | "cm_id = %p, refcount = %u.\n", | |
2412 | nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, | |
2413 | nesqp->hwqp.sq_tail, cm_id, | |
2414 | atomic_read(&nesqp->refcount)); | |
3c2d774c GS |
2415 | |
2416 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2417 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2418 | if (ret) | |
6492cdf3 FL |
2419 | nes_debug(NES_DBG_CM, "OFA CM event_handler " |
2420 | "returned, ret=%d\n", ret); | |
3c2d774c GS |
2421 | spin_lock_irqsave(&nesqp->lock, flags); |
2422 | } | |
2423 | ||
2424 | nesqp->disconn_pending = 0; | |
2425 | /* There might have been another AE while the lock was released */ | |
2426 | original_hw_tcp_state = nesqp->hw_tcp_state; | |
2427 | original_ibqp_state = nesqp->ibqp_state; | |
2428 | last_ae = nesqp->last_aeq; | |
2429 | ||
2430 | if ((issued_disconnect_reset == 0) && (nesqp->cm_id) && | |
2431 | ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) || | |
2432 | (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) || | |
2433 | (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) || | |
2434 | (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) { | |
2435 | atomic_inc(&cm_closes); | |
2436 | nesqp->cm_id = NULL; | |
2437 | nesqp->in_disconnect = 0; | |
2438 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2439 | nes_disconnect(nesqp, 1); | |
2440 | ||
2441 | cm_id->provider_data = nesqp; | |
2442 | /* Send up the close complete event */ | |
2443 | cm_event.event = IW_CM_EVENT_CLOSE; | |
2444 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
2445 | cm_event.provider_data = cm_id->provider_data; | |
2446 | cm_event.local_addr = cm_id->local_addr; | |
2447 | cm_event.remote_addr = cm_id->remote_addr; | |
2448 | cm_event.private_data = NULL; | |
2449 | cm_event.private_data_len = 0; | |
2450 | ||
2451 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2452 | if (ret) { | |
2453 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2454 | } | |
2455 | ||
2456 | cm_id->rem_ref(cm_id); | |
2457 | ||
2458 | spin_lock_irqsave(&nesqp->lock, flags); | |
2459 | if (nesqp->flush_issued == 0) { | |
2460 | nesqp->flush_issued = 1; | |
2461 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
6492cdf3 FL |
2462 | flush_wqes(nesvnic->nesdev, nesqp, |
2463 | NES_CQP_FLUSH_RQ, 1); | |
2464 | } else | |
3c2d774c | 2465 | spin_unlock_irqrestore(&nesqp->lock, flags); |
3c2d774c GS |
2466 | } else { |
2467 | cm_id = nesqp->cm_id; | |
2468 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2469 | /* check to see if the inbound reset beat the outbound reset */ | |
2470 | if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) { | |
6492cdf3 FL |
2471 | nes_debug(NES_DBG_CM, "QP%u: Decing refcount " |
2472 | "due to inbound reset beating the " | |
2473 | "outbound reset.\n", nesqp->hwqp.qp_id); | |
3c2d774c GS |
2474 | } |
2475 | } | |
2476 | } else { | |
2477 | nesqp->disconn_pending = 0; | |
2478 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2479 | } | |
3c2d774c GS |
2480 | |
2481 | return 0; | |
2482 | } | |
2483 | ||
2484 | ||
2485 | /** | |
2486 | * nes_disconnect | |
2487 | */ | |
1a855fbf | 2488 | static int nes_disconnect(struct nes_qp *nesqp, int abrupt) |
3c2d774c GS |
2489 | { |
2490 | int ret = 0; | |
2491 | struct nes_vnic *nesvnic; | |
2492 | struct nes_device *nesdev; | |
c12e56ef | 2493 | struct nes_ib_device *nesibdev; |
3c2d774c GS |
2494 | |
2495 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2496 | if (!nesvnic) | |
2497 | return -EINVAL; | |
2498 | ||
2499 | nesdev = nesvnic->nesdev; | |
c12e56ef | 2500 | nesibdev = nesvnic->nesibdev; |
3c2d774c GS |
2501 | |
2502 | nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", | |
2503 | atomic_read(&nesvnic->netdev->refcnt)); | |
2504 | ||
2505 | if (nesqp->active_conn) { | |
2506 | ||
2507 | /* indicate this connection is NOT active */ | |
2508 | nesqp->active_conn = 0; | |
2509 | } else { | |
2510 | /* Need to free the Last Streaming Mode Message */ | |
2511 | if (nesqp->ietf_frame) { | |
c12e56ef FL |
2512 | if (nesqp->lsmm_mr) |
2513 | nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr); | |
3c2d774c GS |
2514 | pci_free_consistent(nesdev->pcidev, |
2515 | nesqp->private_data_len+sizeof(struct ietf_mpa_frame), | |
2516 | nesqp->ietf_frame, nesqp->ietf_frame_pbase); | |
2517 | } | |
2518 | } | |
2519 | ||
2520 | /* close the CM node down if it is still active */ | |
2521 | if (nesqp->cm_node) { | |
2522 | nes_debug(NES_DBG_CM, "Call close API\n"); | |
2523 | ||
2524 | g_cm_core->api->close(g_cm_core, nesqp->cm_node); | |
3c2d774c GS |
2525 | } |
2526 | ||
2527 | return ret; | |
2528 | } | |
2529 | ||
2530 | ||
2531 | /** | |
2532 | * nes_accept | |
2533 | */ | |
2534 | int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
2535 | { | |
2536 | u64 u64temp; | |
2537 | struct ib_qp *ibqp; | |
2538 | struct nes_qp *nesqp; | |
2539 | struct nes_vnic *nesvnic; | |
2540 | struct nes_device *nesdev; | |
2541 | struct nes_cm_node *cm_node; | |
2542 | struct nes_adapter *adapter; | |
2543 | struct ib_qp_attr attr; | |
2544 | struct iw_cm_event cm_event; | |
2545 | struct nes_hw_qp_wqe *wqe; | |
2546 | struct nes_v4_quad nes_quad; | |
30da7cff | 2547 | u32 crc_value; |
3c2d774c | 2548 | int ret; |
183ecfa3 | 2549 | int passive_state; |
c12e56ef FL |
2550 | struct nes_ib_device *nesibdev; |
2551 | struct ib_mr *ibmr = NULL; | |
2552 | struct ib_phys_buf ibphysbuf; | |
2553 | struct nes_pd *nespd; | |
2554 | ||
2555 | ||
3c2d774c GS |
2556 | |
2557 | ibqp = nes_get_qp(cm_id->device, conn_param->qpn); | |
2558 | if (!ibqp) | |
2559 | return -EINVAL; | |
2560 | ||
2561 | /* get all our handles */ | |
2562 | nesqp = to_nesqp(ibqp); | |
2563 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2564 | nesdev = nesvnic->nesdev; | |
2565 | adapter = nesdev->nesadapter; | |
2566 | ||
3c2d774c | 2567 | cm_node = (struct nes_cm_node *)cm_id->provider_data; |
6492cdf3 FL |
2568 | nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p," |
2569 | "%s\n", cm_node, nesvnic, nesvnic->netdev, | |
2570 | nesvnic->netdev->name); | |
3c2d774c GS |
2571 | |
2572 | /* associate the node with the QP */ | |
2573 | nesqp->cm_node = (void *)cm_node; | |
6492cdf3 FL |
2574 | cm_node->nesqp = nesqp; |
2575 | nes_add_ref(&nesqp->ibqp); | |
3c2d774c | 2576 | |
6492cdf3 FL |
2577 | nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n", |
2578 | nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener); | |
3c2d774c GS |
2579 | atomic_inc(&cm_accepts); |
2580 | ||
2581 | nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", | |
2582 | atomic_read(&nesvnic->netdev->refcnt)); | |
2583 | ||
6492cdf3 FL |
2584 | /* allocate the ietf frame and space for private data */ |
2585 | nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev, | |
2586 | sizeof(struct ietf_mpa_frame) + conn_param->private_data_len, | |
2587 | &nesqp->ietf_frame_pbase); | |
3c2d774c | 2588 | |
6492cdf3 FL |
2589 | if (!nesqp->ietf_frame) { |
2590 | nes_debug(NES_DBG_CM, "Unable to allocate memory for private " | |
2591 | "data\n"); | |
2592 | return -ENOMEM; | |
2593 | } | |
3c2d774c | 2594 | |
3c2d774c | 2595 | |
6492cdf3 FL |
2596 | /* setup the MPA frame */ |
2597 | nesqp->private_data_len = conn_param->private_data_len; | |
2598 | memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); | |
3c2d774c | 2599 | |
6492cdf3 FL |
2600 | memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data, |
2601 | conn_param->private_data_len); | |
3c2d774c | 2602 | |
6492cdf3 FL |
2603 | nesqp->ietf_frame->priv_data_len = |
2604 | cpu_to_be16(conn_param->private_data_len); | |
2605 | nesqp->ietf_frame->rev = mpa_version; | |
2606 | nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC; | |
3c2d774c | 2607 | |
6492cdf3 FL |
2608 | /* setup our first outgoing iWarp send WQE (the IETF frame response) */ |
2609 | wqe = &nesqp->hwqp.sq_vbase[0]; | |
2610 | ||
2611 | if (cm_id->remote_addr.sin_addr.s_addr != | |
2612 | cm_id->local_addr.sin_addr.s_addr) { | |
2613 | u64temp = (unsigned long)nesqp; | |
c12e56ef FL |
2614 | nesibdev = nesvnic->nesibdev; |
2615 | nespd = nesqp->nespd; | |
2616 | ibphysbuf.addr = nesqp->ietf_frame_pbase; | |
2617 | ibphysbuf.size = conn_param->private_data_len + | |
2618 | sizeof(struct ietf_mpa_frame); | |
2619 | ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd, | |
2620 | &ibphysbuf, 1, | |
2621 | IB_ACCESS_LOCAL_WRITE, | |
2622 | (u64 *)&nesqp->ietf_frame); | |
2623 | if (!ibmr) { | |
2624 | nes_debug(NES_DBG_CM, "Unable to register memory region" | |
2625 | "for lSMM for cm_node = %p \n", | |
2626 | cm_node); | |
2627 | return -ENOMEM; | |
2628 | } | |
2629 | ||
2630 | ibmr->pd = &nespd->ibpd; | |
2631 | ibmr->device = nespd->ibpd.device; | |
2632 | nesqp->lsmm_mr = ibmr; | |
2633 | ||
6492cdf3 FL |
2634 | u64temp |= NES_SW_CONTEXT_ALIGN>>1; |
2635 | set_wqe_64bit_value(wqe->wqe_words, | |
2636 | NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, | |
2637 | u64temp); | |
2638 | wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = | |
2639 | cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING | | |
2640 | NES_IWARP_SQ_WQE_WRPDU); | |
2641 | wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = | |
2642 | cpu_to_le32(conn_param->private_data_len + | |
2643 | sizeof(struct ietf_mpa_frame)); | |
c12e56ef FL |
2644 | set_wqe_64bit_value(wqe->wqe_words, |
2645 | NES_IWARP_SQ_WQE_FRAG0_LOW_IDX, | |
2646 | (u64)nesqp->ietf_frame); | |
6492cdf3 FL |
2647 | wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = |
2648 | cpu_to_le32(conn_param->private_data_len + | |
2649 | sizeof(struct ietf_mpa_frame)); | |
c12e56ef | 2650 | wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey; |
6492cdf3 FL |
2651 | |
2652 | nesqp->nesqp_context->ird_ord_sizes |= | |
2653 | cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | | |
2654 | NES_QPCONTEXT_ORDIRD_WRPDU); | |
2655 | } else { | |
2656 | nesqp->nesqp_context->ird_ord_sizes |= | |
2657 | cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | | |
2658 | NES_QPCONTEXT_ORDIRD_WRPDU | | |
2659 | NES_QPCONTEXT_ORDIRD_ALSMM)); | |
2660 | } | |
2661 | nesqp->skip_lsmm = 1; | |
3c2d774c GS |
2662 | |
2663 | ||
2664 | /* Cache the cm_id in the qp */ | |
2665 | nesqp->cm_id = cm_id; | |
2666 | cm_node->cm_id = cm_id; | |
2667 | ||
2668 | /* nesqp->cm_node = (void *)cm_id->provider_data; */ | |
2669 | cm_id->provider_data = nesqp; | |
2670 | nesqp->active_conn = 0; | |
2671 | ||
6492cdf3 FL |
2672 | if (cm_node->state == NES_CM_STATE_TSA) |
2673 | nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n", | |
2674 | cm_node); | |
2675 | ||
3c2d774c GS |
2676 | nes_cm_init_tsa_conn(nesqp, cm_node); |
2677 | ||
6492cdf3 FL |
2678 | nesqp->nesqp_context->tcpPorts[0] = |
2679 | cpu_to_le16(ntohs(cm_id->local_addr.sin_port)); | |
2680 | nesqp->nesqp_context->tcpPorts[1] = | |
2681 | cpu_to_le16(ntohs(cm_id->remote_addr.sin_port)); | |
2682 | ||
2683 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) | |
2684 | nesqp->nesqp_context->ip0 = | |
2685 | cpu_to_le32(ntohl(nesvnic->local_ipaddr)); | |
2686 | else | |
2687 | nesqp->nesqp_context->ip0 = | |
2688 | cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr)); | |
3c2d774c GS |
2689 | |
2690 | nesqp->nesqp_context->misc2 |= cpu_to_le32( | |
6492cdf3 FL |
2691 | (u32)PCI_FUNC(nesdev->pcidev->devfn) << |
2692 | NES_QPCONTEXT_MISC2_SRC_IP_SHIFT); | |
3c2d774c | 2693 | |
6492cdf3 FL |
2694 | nesqp->nesqp_context->arp_index_vlan |= |
2695 | cpu_to_le32(nes_arp_table(nesdev, | |
2696 | le32_to_cpu(nesqp->nesqp_context->ip0), NULL, | |
3c2d774c GS |
2697 | NES_ARP_RESOLVE) << 16); |
2698 | ||
2699 | nesqp->nesqp_context->ts_val_delta = cpu_to_le32( | |
6492cdf3 | 2700 | jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW)); |
3c2d774c GS |
2701 | |
2702 | nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id); | |
2703 | ||
2704 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32( | |
6492cdf3 FL |
2705 | ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT)); |
2706 | nesqp->nesqp_context->ird_ord_sizes |= | |
2707 | cpu_to_le32((u32)conn_param->ord); | |
3c2d774c GS |
2708 | |
2709 | memset(&nes_quad, 0, sizeof(nes_quad)); | |
6492cdf3 FL |
2710 | nes_quad.DstIpAdrIndex = |
2711 | cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); | |
2712 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) | |
2713 | nes_quad.SrcIpadr = nesvnic->local_ipaddr; | |
2714 | else | |
2715 | nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr; | |
2716 | nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port; | |
2717 | nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port; | |
3c2d774c GS |
2718 | |
2719 | /* Produce hash key */ | |
30da7cff FL |
2720 | crc_value = get_crc_value(&nes_quad); |
2721 | nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff); | |
3c2d774c | 2722 | nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n", |
6492cdf3 | 2723 | nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask); |
3c2d774c GS |
2724 | |
2725 | nesqp->hte_index &= adapter->hte_index_mask; | |
2726 | nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); | |
2727 | ||
2728 | cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node); | |
2729 | ||
6492cdf3 FL |
2730 | nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = " |
2731 | "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + " | |
2732 | "private data length=%zu.\n", nesqp->hwqp.qp_id, | |
3c2d774c GS |
2733 | ntohl(cm_id->remote_addr.sin_addr.s_addr), |
2734 | ntohs(cm_id->remote_addr.sin_port), | |
2735 | ntohl(cm_id->local_addr.sin_addr.s_addr), | |
2736 | ntohs(cm_id->local_addr.sin_port), | |
2737 | le32_to_cpu(nesqp->nesqp_context->rcv_nxt), | |
2738 | le32_to_cpu(nesqp->nesqp_context->snd_nxt), | |
6492cdf3 FL |
2739 | conn_param->private_data_len + |
2740 | sizeof(struct ietf_mpa_frame)); | |
3c2d774c | 2741 | |
3c2d774c | 2742 | |
73ac36ea | 2743 | /* notify OF layer that accept event was successful */ |
3c2d774c GS |
2744 | cm_id->add_ref(cm_id); |
2745 | ||
2746 | cm_event.event = IW_CM_EVENT_ESTABLISHED; | |
2747 | cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED; | |
2748 | cm_event.provider_data = (void *)nesqp; | |
2749 | cm_event.local_addr = cm_id->local_addr; | |
2750 | cm_event.remote_addr = cm_id->remote_addr; | |
2751 | cm_event.private_data = NULL; | |
2752 | cm_event.private_data_len = 0; | |
2753 | ret = cm_id->event_handler(cm_id, &cm_event); | |
183ecfa3 FL |
2754 | attr.qp_state = IB_QPS_RTS; |
2755 | nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL); | |
3c2d774c | 2756 | if (cm_node->loopbackpartner) { |
6492cdf3 FL |
2757 | cm_node->loopbackpartner->mpa_frame_size = |
2758 | nesqp->private_data_len; | |
3c2d774c | 2759 | /* copy entire MPA frame to our cm_node's frame */ |
6492cdf3 FL |
2760 | memcpy(cm_node->loopbackpartner->mpa_frame_buf, |
2761 | nesqp->ietf_frame->priv_data, nesqp->private_data_len); | |
3c2d774c GS |
2762 | create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED); |
2763 | } | |
2764 | if (ret) | |
6492cdf3 FL |
2765 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, " |
2766 | "ret=%d\n", __func__, __LINE__, ret); | |
3c2d774c | 2767 | |
183ecfa3 FL |
2768 | passive_state = atomic_add_return(1, &cm_node->passive_state); |
2769 | if (passive_state == NES_SEND_RESET_EVENT) | |
2770 | create_event(cm_node, NES_CM_EVENT_RESET); | |
3c2d774c GS |
2771 | return 0; |
2772 | } | |
2773 | ||
2774 | ||
2775 | /** | |
2776 | * nes_reject | |
2777 | */ | |
2778 | int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) | |
2779 | { | |
2780 | struct nes_cm_node *cm_node; | |
2781 | struct nes_cm_core *cm_core; | |
2782 | ||
2783 | atomic_inc(&cm_rejects); | |
2784 | cm_node = (struct nes_cm_node *) cm_id->provider_data; | |
2785 | cm_core = cm_node->cm_core; | |
2786 | cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len; | |
2787 | ||
2788 | strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP); | |
2789 | memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len); | |
2790 | ||
2791 | cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len); | |
2792 | cm_node->mpa_frame.rev = mpa_version; | |
2793 | cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT; | |
2794 | ||
2795 | cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node); | |
2796 | ||
2797 | return 0; | |
2798 | } | |
2799 | ||
2800 | ||
2801 | /** | |
2802 | * nes_connect | |
2803 | * setup and launch cm connect node | |
2804 | */ | |
2805 | int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
2806 | { | |
2807 | struct ib_qp *ibqp; | |
2808 | struct nes_qp *nesqp; | |
2809 | struct nes_vnic *nesvnic; | |
2810 | struct nes_device *nesdev; | |
2811 | struct nes_cm_node *cm_node; | |
2812 | struct nes_cm_info cm_info; | |
2813 | ||
2814 | ibqp = nes_get_qp(cm_id->device, conn_param->qpn); | |
2815 | if (!ibqp) | |
2816 | return -EINVAL; | |
2817 | nesqp = to_nesqp(ibqp); | |
2818 | if (!nesqp) | |
2819 | return -EINVAL; | |
2820 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2821 | if (!nesvnic) | |
2822 | return -EINVAL; | |
2823 | nesdev = nesvnic->nesdev; | |
2824 | if (!nesdev) | |
2825 | return -EINVAL; | |
2826 | ||
6492cdf3 FL |
2827 | nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = " |
2828 | "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id, | |
2829 | ntohl(nesvnic->local_ipaddr), | |
2830 | ntohl(cm_id->remote_addr.sin_addr.s_addr), | |
2831 | ntohs(cm_id->remote_addr.sin_port), | |
2832 | ntohl(cm_id->local_addr.sin_addr.s_addr), | |
2833 | ntohs(cm_id->local_addr.sin_port)); | |
3c2d774c | 2834 | |
6492cdf3 | 2835 | atomic_inc(&cm_connects); |
3c2d774c GS |
2836 | nesqp->active_conn = 1; |
2837 | ||
3c2d774c GS |
2838 | /* cache the cm_id in the qp */ |
2839 | nesqp->cm_id = cm_id; | |
2840 | ||
2841 | cm_id->provider_data = nesqp; | |
2842 | ||
3c2d774c GS |
2843 | nesqp->private_data_len = conn_param->private_data_len; |
2844 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord); | |
2845 | nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord); | |
6492cdf3 FL |
2846 | nes_debug(NES_DBG_CM, "mpa private data len =%u\n", |
2847 | conn_param->private_data_len); | |
3c2d774c | 2848 | |
6492cdf3 FL |
2849 | if (cm_id->local_addr.sin_addr.s_addr != |
2850 | cm_id->remote_addr.sin_addr.s_addr) | |
3c2d774c | 2851 | nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), |
6492cdf3 | 2852 | PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD); |
3c2d774c GS |
2853 | |
2854 | /* set up the connection params for the node */ | |
6492cdf3 FL |
2855 | cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr); |
2856 | cm_info.loc_port = htons(cm_id->local_addr.sin_port); | |
2857 | cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr); | |
2858 | cm_info.rem_port = htons(cm_id->remote_addr.sin_port); | |
3c2d774c GS |
2859 | cm_info.cm_id = cm_id; |
2860 | cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; | |
2861 | ||
2862 | cm_id->add_ref(cm_id); | |
3c2d774c GS |
2863 | |
2864 | /* create a connect CM node connection */ | |
6492cdf3 FL |
2865 | cm_node = g_cm_core->api->connect(g_cm_core, nesvnic, |
2866 | conn_param->private_data_len, (void *)conn_param->private_data, | |
2867 | &cm_info); | |
3c2d774c | 2868 | if (!cm_node) { |
6492cdf3 FL |
2869 | if (cm_id->local_addr.sin_addr.s_addr != |
2870 | cm_id->remote_addr.sin_addr.s_addr) | |
3c2d774c | 2871 | nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), |
6492cdf3 FL |
2872 | PCI_FUNC(nesdev->pcidev->devfn), |
2873 | NES_MANAGE_APBVT_DEL); | |
2874 | ||
3c2d774c GS |
2875 | cm_id->rem_ref(cm_id); |
2876 | return -ENOMEM; | |
2877 | } | |
2878 | ||
2879 | cm_node->apbvt_set = 1; | |
2880 | nesqp->cm_node = cm_node; | |
6492cdf3 | 2881 | cm_node->nesqp = nesqp; |
d7ffd507 | 2882 | nes_add_ref(&nesqp->ibqp); |
3c2d774c GS |
2883 | |
2884 | return 0; | |
2885 | } | |
2886 | ||
2887 | ||
2888 | /** | |
2889 | * nes_create_listen | |
2890 | */ | |
2891 | int nes_create_listen(struct iw_cm_id *cm_id, int backlog) | |
2892 | { | |
2893 | struct nes_vnic *nesvnic; | |
2894 | struct nes_cm_listener *cm_node; | |
2895 | struct nes_cm_info cm_info; | |
2896 | struct nes_adapter *adapter; | |
2897 | int err; | |
2898 | ||
2899 | ||
2900 | nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n", | |
2901 | cm_id, ntohs(cm_id->local_addr.sin_port)); | |
2902 | ||
2903 | nesvnic = to_nesvnic(cm_id->device); | |
2904 | if (!nesvnic) | |
2905 | return -EINVAL; | |
2906 | adapter = nesvnic->nesdev->nesadapter; | |
2907 | nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n", | |
2908 | nesvnic, nesvnic->netdev, nesvnic->netdev->name); | |
2909 | ||
2910 | nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n", | |
2911 | nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr); | |
2912 | ||
2913 | /* setup listen params in our api call struct */ | |
2914 | cm_info.loc_addr = nesvnic->local_ipaddr; | |
2915 | cm_info.loc_port = cm_id->local_addr.sin_port; | |
2916 | cm_info.backlog = backlog; | |
2917 | cm_info.cm_id = cm_id; | |
2918 | ||
2919 | cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; | |
2920 | ||
2921 | ||
2922 | cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info); | |
2923 | if (!cm_node) { | |
6492cdf3 | 2924 | printk(KERN_ERR "%s[%u] Error returned from listen API call\n", |
33718363 | 2925 | __func__, __LINE__); |
3c2d774c GS |
2926 | return -ENOMEM; |
2927 | } | |
2928 | ||
2929 | cm_id->provider_data = cm_node; | |
2930 | ||
2931 | if (!cm_node->reused_node) { | |
6492cdf3 FL |
2932 | err = nes_manage_apbvt(nesvnic, |
2933 | ntohs(cm_id->local_addr.sin_port), | |
2934 | PCI_FUNC(nesvnic->nesdev->pcidev->devfn), | |
2935 | NES_MANAGE_APBVT_ADD); | |
3c2d774c | 2936 | if (err) { |
6492cdf3 FL |
2937 | printk(KERN_ERR "nes_manage_apbvt call returned %d.\n", |
2938 | err); | |
3c2d774c GS |
2939 | g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node); |
2940 | return err; | |
2941 | } | |
2942 | cm_listens_created++; | |
2943 | } | |
2944 | ||
2945 | cm_id->add_ref(cm_id); | |
2946 | cm_id->provider_data = (void *)cm_node; | |
2947 | ||
2948 | ||
2949 | return 0; | |
2950 | } | |
2951 | ||
2952 | ||
2953 | /** | |
2954 | * nes_destroy_listen | |
2955 | */ | |
2956 | int nes_destroy_listen(struct iw_cm_id *cm_id) | |
2957 | { | |
2958 | if (cm_id->provider_data) | |
2959 | g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data); | |
2960 | else | |
2961 | nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n"); | |
2962 | ||
2963 | cm_id->rem_ref(cm_id); | |
2964 | ||
2965 | return 0; | |
2966 | } | |
2967 | ||
2968 | ||
2969 | /** | |
2970 | * nes_cm_recv | |
2971 | */ | |
2972 | int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice) | |
2973 | { | |
4a14f6a7 | 2974 | int rc = 0; |
3c2d774c GS |
2975 | cm_packets_received++; |
2976 | if ((g_cm_core) && (g_cm_core->api)) { | |
4a14f6a7 | 2977 | rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb); |
3c2d774c GS |
2978 | } else { |
2979 | nes_debug(NES_DBG_CM, "Unable to process packet for CM," | |
2980 | " cm is not setup properly.\n"); | |
2981 | } | |
2982 | ||
4a14f6a7 | 2983 | return rc; |
3c2d774c GS |
2984 | } |
2985 | ||
2986 | ||
2987 | /** | |
2988 | * nes_cm_start | |
2989 | * Start and init a cm core module | |
2990 | */ | |
2991 | int nes_cm_start(void) | |
2992 | { | |
2993 | nes_debug(NES_DBG_CM, "\n"); | |
2994 | /* create the primary CM core, pass this handle to subsequent core inits */ | |
2995 | g_cm_core = nes_cm_alloc_core(); | |
2996 | if (g_cm_core) { | |
2997 | return 0; | |
2998 | } else { | |
2999 | return -ENOMEM; | |
3000 | } | |
3001 | } | |
3002 | ||
3003 | ||
3004 | /** | |
3005 | * nes_cm_stop | |
3006 | * stop and dealloc all cm core instances | |
3007 | */ | |
3008 | int nes_cm_stop(void) | |
3009 | { | |
3010 | g_cm_core->api->destroy_cm_core(g_cm_core); | |
3011 | return 0; | |
3012 | } | |
3013 | ||
3014 | ||
3015 | /** | |
3016 | * cm_event_connected | |
3017 | * handle a connected event, setup QPs and HW | |
3018 | */ | |
1a855fbf | 3019 | static void cm_event_connected(struct nes_cm_event *event) |
3c2d774c GS |
3020 | { |
3021 | u64 u64temp; | |
3022 | struct nes_qp *nesqp; | |
3023 | struct nes_vnic *nesvnic; | |
3024 | struct nes_device *nesdev; | |
3025 | struct nes_cm_node *cm_node; | |
3026 | struct nes_adapter *nesadapter; | |
3027 | struct ib_qp_attr attr; | |
3028 | struct iw_cm_id *cm_id; | |
3029 | struct iw_cm_event cm_event; | |
3030 | struct nes_hw_qp_wqe *wqe; | |
3031 | struct nes_v4_quad nes_quad; | |
30da7cff | 3032 | u32 crc_value; |
3c2d774c GS |
3033 | int ret; |
3034 | ||
3035 | /* get all our handles */ | |
3036 | cm_node = event->cm_node; | |
3037 | cm_id = cm_node->cm_id; | |
3038 | nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id); | |
3039 | nesqp = (struct nes_qp *)cm_id->provider_data; | |
3040 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
3041 | nesdev = nesvnic->nesdev; | |
3042 | nesadapter = nesdev->nesadapter; | |
3043 | ||
3044 | if (nesqp->destroyed) { | |
3045 | return; | |
3046 | } | |
3047 | atomic_inc(&cm_connecteds); | |
3048 | nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on" | |
3049 | " local port 0x%04X. jiffies = %lu.\n", | |
3050 | nesqp->hwqp.qp_id, | |
3051 | ntohl(cm_id->remote_addr.sin_addr.s_addr), | |
3052 | ntohs(cm_id->remote_addr.sin_port), | |
3053 | ntohs(cm_id->local_addr.sin_port), | |
3054 | jiffies); | |
3055 | ||
3056 | nes_cm_init_tsa_conn(nesqp, cm_node); | |
3057 | ||
3058 | /* set the QP tsa context */ | |
6492cdf3 FL |
3059 | nesqp->nesqp_context->tcpPorts[0] = |
3060 | cpu_to_le16(ntohs(cm_id->local_addr.sin_port)); | |
3061 | nesqp->nesqp_context->tcpPorts[1] = | |
3062 | cpu_to_le16(ntohs(cm_id->remote_addr.sin_port)); | |
3063 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) | |
3064 | nesqp->nesqp_context->ip0 = | |
3065 | cpu_to_le32(ntohl(nesvnic->local_ipaddr)); | |
3066 | else | |
3067 | nesqp->nesqp_context->ip0 = | |
3068 | cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr)); | |
3c2d774c GS |
3069 | |
3070 | nesqp->nesqp_context->misc2 |= cpu_to_le32( | |
6492cdf3 FL |
3071 | (u32)PCI_FUNC(nesdev->pcidev->devfn) << |
3072 | NES_QPCONTEXT_MISC2_SRC_IP_SHIFT); | |
3c2d774c | 3073 | nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32( |
6492cdf3 FL |
3074 | nes_arp_table(nesdev, |
3075 | le32_to_cpu(nesqp->nesqp_context->ip0), | |
3c2d774c GS |
3076 | NULL, NES_ARP_RESOLVE) << 16); |
3077 | nesqp->nesqp_context->ts_val_delta = cpu_to_le32( | |
3078 | jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW)); | |
3079 | nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id); | |
3080 | nesqp->nesqp_context->ird_ord_sizes |= | |
6492cdf3 FL |
3081 | cpu_to_le32((u32)1 << |
3082 | NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT); | |
3c2d774c GS |
3083 | |
3084 | /* Adjust tail for not having a LSMM */ | |
3085 | nesqp->hwqp.sq_tail = 1; | |
3086 | ||
3087 | #if defined(NES_SEND_FIRST_WRITE) | |
6492cdf3 FL |
3088 | if (cm_node->send_write0) { |
3089 | nes_debug(NES_DBG_CM, "Sending first write.\n"); | |
3090 | wqe = &nesqp->hwqp.sq_vbase[0]; | |
3091 | u64temp = (unsigned long)nesqp; | |
3092 | u64temp |= NES_SW_CONTEXT_ALIGN>>1; | |
3093 | set_wqe_64bit_value(wqe->wqe_words, | |
3094 | NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp); | |
3095 | wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = | |
3096 | cpu_to_le32(NES_IWARP_SQ_OP_RDMAW); | |
3097 | wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0; | |
3098 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0; | |
3099 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0; | |
3100 | wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0; | |
3101 | wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0; | |
3102 | ||
3103 | /* use the reserved spot on the WQ for the extra first WQE */ | |
3104 | nesqp->nesqp_context->ird_ord_sizes &= | |
3105 | cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | | |
3106 | NES_QPCONTEXT_ORDIRD_WRPDU | | |
3107 | NES_QPCONTEXT_ORDIRD_ALSMM)); | |
3108 | nesqp->skip_lsmm = 1; | |
3109 | nesqp->hwqp.sq_tail = 0; | |
3110 | nes_write32(nesdev->regs + NES_WQE_ALLOC, | |
3111 | (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id); | |
3112 | } | |
3c2d774c GS |
3113 | #endif |
3114 | ||
3115 | memset(&nes_quad, 0, sizeof(nes_quad)); | |
3116 | ||
6492cdf3 FL |
3117 | nes_quad.DstIpAdrIndex = |
3118 | cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); | |
3119 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) | |
3120 | nes_quad.SrcIpadr = nesvnic->local_ipaddr; | |
3121 | else | |
3122 | nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr; | |
3c2d774c GS |
3123 | nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port; |
3124 | nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port; | |
3125 | ||
3126 | /* Produce hash key */ | |
30da7cff FL |
3127 | crc_value = get_crc_value(&nes_quad); |
3128 | nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff); | |
3c2d774c GS |
3129 | nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n", |
3130 | nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask); | |
3131 | ||
3132 | nesqp->hte_index &= nesadapter->hte_index_mask; | |
3133 | nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); | |
3134 | ||
3135 | nesqp->ietf_frame = &cm_node->mpa_frame; | |
3136 | nesqp->private_data_len = (u8) cm_node->mpa_frame_size; | |
3137 | cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node); | |
3138 | ||
3c2d774c GS |
3139 | /* notify OF layer we successfully created the requested connection */ |
3140 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; | |
3141 | cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED; | |
3142 | cm_event.provider_data = cm_id->provider_data; | |
3143 | cm_event.local_addr.sin_family = AF_INET; | |
3144 | cm_event.local_addr.sin_port = cm_id->local_addr.sin_port; | |
3145 | cm_event.remote_addr = cm_id->remote_addr; | |
3146 | ||
6492cdf3 FL |
3147 | cm_event.private_data = (void *)event->cm_node->mpa_frame_buf; |
3148 | cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size; | |
3c2d774c GS |
3149 | |
3150 | cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr; | |
3151 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3152 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
3153 | ||
3154 | if (ret) | |
6492cdf3 FL |
3155 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, " |
3156 | "ret=%d\n", __func__, __LINE__, ret); | |
3157 | attr.qp_state = IB_QPS_RTS; | |
3158 | nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL); | |
3c2d774c | 3159 | |
6492cdf3 FL |
3160 | nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = " |
3161 | "%lu\n", nesqp->hwqp.qp_id, jiffies); | |
3c2d774c GS |
3162 | |
3163 | return; | |
3164 | } | |
3165 | ||
3166 | ||
3167 | /** | |
3168 | * cm_event_connect_error | |
3169 | */ | |
1a855fbf | 3170 | static void cm_event_connect_error(struct nes_cm_event *event) |
3c2d774c GS |
3171 | { |
3172 | struct nes_qp *nesqp; | |
3173 | struct iw_cm_id *cm_id; | |
3174 | struct iw_cm_event cm_event; | |
3175 | /* struct nes_cm_info cm_info; */ | |
3176 | int ret; | |
3177 | ||
3178 | if (!event->cm_node) | |
3179 | return; | |
3180 | ||
3181 | cm_id = event->cm_node->cm_id; | |
3182 | if (!cm_id) { | |
3183 | return; | |
3184 | } | |
3185 | ||
3186 | nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id); | |
3187 | nesqp = cm_id->provider_data; | |
3188 | ||
3189 | if (!nesqp) { | |
3190 | return; | |
3191 | } | |
3192 | ||
3193 | /* notify OF layer about this connection error event */ | |
3194 | /* cm_id->rem_ref(cm_id); */ | |
3195 | nesqp->cm_id = NULL; | |
3196 | cm_id->provider_data = NULL; | |
3197 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; | |
3198 | cm_event.status = IW_CM_EVENT_STATUS_REJECTED; | |
3199 | cm_event.provider_data = cm_id->provider_data; | |
3200 | cm_event.local_addr = cm_id->local_addr; | |
3201 | cm_event.remote_addr = cm_id->remote_addr; | |
3202 | cm_event.private_data = NULL; | |
3203 | cm_event.private_data_len = 0; | |
3204 | ||
6492cdf3 FL |
3205 | nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, " |
3206 | "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr, | |
3207 | cm_event.remote_addr.sin_addr.s_addr); | |
3c2d774c GS |
3208 | |
3209 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3210 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
3211 | if (ret) | |
6492cdf3 FL |
3212 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, " |
3213 | "ret=%d\n", __func__, __LINE__, ret); | |
6492cdf3 | 3214 | cm_id->rem_ref(cm_id); |
3c2d774c | 3215 | |
6492cdf3 | 3216 | rem_ref_cm_node(event->cm_node->cm_core, event->cm_node); |
3c2d774c GS |
3217 | return; |
3218 | } | |
3219 | ||
3220 | ||
3221 | /** | |
3222 | * cm_event_reset | |
3223 | */ | |
1a855fbf | 3224 | static void cm_event_reset(struct nes_cm_event *event) |
3c2d774c GS |
3225 | { |
3226 | struct nes_qp *nesqp; | |
3227 | struct iw_cm_id *cm_id; | |
3228 | struct iw_cm_event cm_event; | |
3229 | /* struct nes_cm_info cm_info; */ | |
3230 | int ret; | |
3231 | ||
3232 | if (!event->cm_node) | |
3233 | return; | |
3234 | ||
3235 | if (!event->cm_node->cm_id) | |
3236 | return; | |
3237 | ||
3238 | cm_id = event->cm_node->cm_id; | |
3239 | ||
3240 | nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id); | |
3241 | nesqp = cm_id->provider_data; | |
3242 | ||
3243 | nesqp->cm_id = NULL; | |
3244 | /* cm_id->provider_data = NULL; */ | |
3245 | cm_event.event = IW_CM_EVENT_DISCONNECT; | |
3246 | cm_event.status = IW_CM_EVENT_STATUS_RESET; | |
3247 | cm_event.provider_data = cm_id->provider_data; | |
3248 | cm_event.local_addr = cm_id->local_addr; | |
3249 | cm_event.remote_addr = cm_id->remote_addr; | |
3250 | cm_event.private_data = NULL; | |
3251 | cm_event.private_data_len = 0; | |
3252 | ||
3253 | ret = cm_id->event_handler(cm_id, &cm_event); | |
183ecfa3 FL |
3254 | cm_id->add_ref(cm_id); |
3255 | atomic_inc(&cm_closes); | |
3256 | cm_event.event = IW_CM_EVENT_CLOSE; | |
3257 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
3258 | cm_event.provider_data = cm_id->provider_data; | |
3259 | cm_event.local_addr = cm_id->local_addr; | |
3260 | cm_event.remote_addr = cm_id->remote_addr; | |
3261 | cm_event.private_data = NULL; | |
3262 | cm_event.private_data_len = 0; | |
3263 | nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node); | |
3264 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3265 | ||
3c2d774c GS |
3266 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); |
3267 | ||
3268 | ||
3269 | /* notify OF layer about this connection error event */ | |
3270 | cm_id->rem_ref(cm_id); | |
3271 | ||
3272 | return; | |
3273 | } | |
3274 | ||
3275 | ||
3276 | /** | |
3277 | * cm_event_mpa_req | |
3278 | */ | |
1a855fbf | 3279 | static void cm_event_mpa_req(struct nes_cm_event *event) |
3c2d774c GS |
3280 | { |
3281 | struct iw_cm_id *cm_id; | |
3282 | struct iw_cm_event cm_event; | |
3283 | int ret; | |
3284 | struct nes_cm_node *cm_node; | |
3285 | ||
3286 | cm_node = event->cm_node; | |
3287 | if (!cm_node) | |
3288 | return; | |
3289 | cm_id = cm_node->cm_id; | |
3290 | ||
3291 | atomic_inc(&cm_connect_reqs); | |
3292 | nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n", | |
3293 | cm_node, cm_id, jiffies); | |
3294 | ||
3295 | cm_event.event = IW_CM_EVENT_CONNECT_REQUEST; | |
3296 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
3297 | cm_event.provider_data = (void *)cm_node; | |
3298 | ||
3299 | cm_event.local_addr.sin_family = AF_INET; | |
3300 | cm_event.local_addr.sin_port = htons(event->cm_info.loc_port); | |
3301 | cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr); | |
3302 | ||
3303 | cm_event.remote_addr.sin_family = AF_INET; | |
3304 | cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port); | |
3305 | cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr); | |
3306 | ||
3307 | cm_event.private_data = cm_node->mpa_frame_buf; | |
3308 | cm_event.private_data_len = (u8) cm_node->mpa_frame_size; | |
3309 | ||
3310 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3311 | if (ret) | |
3312 | printk("%s[%u] OFA CM event_handler returned, ret=%d\n", | |
33718363 | 3313 | __func__, __LINE__, ret); |
3c2d774c GS |
3314 | |
3315 | return; | |
3316 | } | |
3317 | ||
3318 | ||
3319 | static void nes_cm_event_handler(struct work_struct *); | |
3320 | ||
3321 | /** | |
3322 | * nes_cm_post_event | |
3323 | * post an event to the cm event handler | |
3324 | */ | |
1a855fbf | 3325 | static int nes_cm_post_event(struct nes_cm_event *event) |
3c2d774c GS |
3326 | { |
3327 | atomic_inc(&event->cm_node->cm_core->events_posted); | |
3328 | add_ref_cm_node(event->cm_node); | |
3329 | event->cm_info.cm_id->add_ref(event->cm_info.cm_id); | |
3330 | INIT_WORK(&event->event_work, nes_cm_event_handler); | |
6492cdf3 FL |
3331 | nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n", |
3332 | event->cm_node, event); | |
3c2d774c GS |
3333 | |
3334 | queue_work(event->cm_node->cm_core->event_wq, &event->event_work); | |
3335 | ||
3336 | nes_debug(NES_DBG_CM, "Exit\n"); | |
3337 | return 0; | |
3338 | } | |
3339 | ||
3340 | ||
3341 | /** | |
3342 | * nes_cm_event_handler | |
3343 | * worker function to handle cm events | |
3344 | * will free instance of nes_cm_event | |
3345 | */ | |
3346 | static void nes_cm_event_handler(struct work_struct *work) | |
3347 | { | |
6492cdf3 FL |
3348 | struct nes_cm_event *event = container_of(work, struct nes_cm_event, |
3349 | event_work); | |
3c2d774c GS |
3350 | struct nes_cm_core *cm_core; |
3351 | ||
6492cdf3 | 3352 | if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core)) |
3c2d774c | 3353 | return; |
6492cdf3 | 3354 | |
3c2d774c GS |
3355 | cm_core = event->cm_node->cm_core; |
3356 | nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n", | |
6492cdf3 | 3357 | event, event->type, atomic_read(&cm_core->events_posted)); |
3c2d774c GS |
3358 | |
3359 | switch (event->type) { | |
6492cdf3 FL |
3360 | case NES_CM_EVENT_MPA_REQ: |
3361 | cm_event_mpa_req(event); | |
3362 | nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n", | |
3363 | event->cm_node); | |
3364 | break; | |
3365 | case NES_CM_EVENT_RESET: | |
3366 | nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n", | |
3367 | event->cm_node); | |
3368 | cm_event_reset(event); | |
3369 | break; | |
3370 | case NES_CM_EVENT_CONNECTED: | |
3371 | if ((!event->cm_node->cm_id) || | |
3372 | (event->cm_node->state != NES_CM_STATE_TSA)) | |
3c2d774c | 3373 | break; |
6492cdf3 FL |
3374 | cm_event_connected(event); |
3375 | nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n"); | |
3376 | break; | |
3377 | case NES_CM_EVENT_ABORTED: | |
3378 | if ((!event->cm_node->cm_id) || | |
3379 | (event->cm_node->state == NES_CM_STATE_TSA)) | |
3c2d774c | 3380 | break; |
6492cdf3 FL |
3381 | cm_event_connect_error(event); |
3382 | nes_debug(NES_DBG_CM, "CM Event: ABORTED\n"); | |
3383 | break; | |
3384 | case NES_CM_EVENT_DROPPED_PKT: | |
3385 | nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n"); | |
3386 | break; | |
3387 | default: | |
3388 | nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n"); | |
3389 | break; | |
3c2d774c GS |
3390 | } |
3391 | ||
3392 | atomic_dec(&cm_core->events_posted); | |
3393 | event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); | |
3394 | rem_ref_cm_node(cm_core, event->cm_node); | |
3395 | kfree(event); | |
3396 | ||
3397 | return; | |
3398 | } |