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RDMA/nes: Add loopback check to make_cm_node()
[deliverable/linux.git] / drivers / infiniband / hw / nes / nes_cm.c
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>
43 #include <linux/if_vlan.h>
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>
55 #include <net/arp.h>
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
77 static inline int mini_cm_accelerated(struct nes_cm_core *,
78 struct nes_cm_node *);
79 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
80 struct nes_vnic *, struct nes_cm_info *);
81 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
82 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
83 struct nes_vnic *, u16, void *, struct nes_cm_info *);
84 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
85 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
86 struct nes_cm_node *);
87 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
88 struct nes_cm_node *);
89 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
90 struct sk_buff *);
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);
94
95 static struct sk_buff *form_cm_frame(struct sk_buff *, struct nes_cm_node *,
96 void *, u32, void *, u32, u8);
97 static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node);
98 static int add_ref_cm_node(struct nes_cm_node *);
99 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
100
101 static int nes_cm_disconn_true(struct nes_qp *);
102 static int nes_cm_post_event(struct nes_cm_event *event);
103 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
104 static void nes_disconnect_worker(struct work_struct *work);
105
106 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
107 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
108 static int send_reset(struct nes_cm_node *, struct sk_buff *);
109 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
110 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
111 static void process_packet(struct nes_cm_node *, struct sk_buff *,
112 struct nes_cm_core *);
113
114 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
115 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
116 static void cleanup_retrans_entry(struct nes_cm_node *);
117 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *,
118 enum nes_cm_event_type);
119 static void free_retrans_entry(struct nes_cm_node *cm_node);
120 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
121 struct sk_buff *skb, int optionsize, int passive);
122
123 /* CM event handler functions */
124 static void cm_event_connected(struct nes_cm_event *);
125 static void cm_event_connect_error(struct nes_cm_event *);
126 static void cm_event_reset(struct nes_cm_event *);
127 static void cm_event_mpa_req(struct nes_cm_event *);
128
129 static void print_core(struct nes_cm_core *core);
130
131 /* External CM API Interface */
132 /* instance of function pointers for client API */
133 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
134 static struct nes_cm_ops nes_cm_api = {
135 mini_cm_accelerated,
136 mini_cm_listen,
137 mini_cm_del_listen,
138 mini_cm_connect,
139 mini_cm_close,
140 mini_cm_accept,
141 mini_cm_reject,
142 mini_cm_recv_pkt,
143 mini_cm_dealloc_core,
144 mini_cm_get,
145 mini_cm_set
146 };
147
148 static struct nes_cm_core *g_cm_core;
149
150 atomic_t cm_connects;
151 atomic_t cm_accepts;
152 atomic_t cm_disconnects;
153 atomic_t cm_closes;
154 atomic_t cm_connecteds;
155 atomic_t cm_connect_reqs;
156 atomic_t cm_rejects;
157
158
159 /**
160 * create_event
161 */
162 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
163 enum nes_cm_event_type type)
164 {
165 struct nes_cm_event *event;
166
167 if (!cm_node->cm_id)
168 return NULL;
169
170 /* allocate an empty event */
171 event = kzalloc(sizeof(*event), GFP_ATOMIC);
172
173 if (!event)
174 return NULL;
175
176 event->type = type;
177 event->cm_node = cm_node;
178 event->cm_info.rem_addr = cm_node->rem_addr;
179 event->cm_info.loc_addr = cm_node->loc_addr;
180 event->cm_info.rem_port = cm_node->rem_port;
181 event->cm_info.loc_port = cm_node->loc_port;
182 event->cm_info.cm_id = cm_node->cm_id;
183
184 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
185 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
186 cm_node, event, type, event->cm_info.loc_addr,
187 event->cm_info.loc_port, event->cm_info.rem_addr,
188 event->cm_info.rem_port);
189
190 nes_cm_post_event(event);
191 return event;
192 }
193
194
195 /**
196 * send_mpa_request
197 */
198 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
199 {
200 int ret;
201 if (!skb) {
202 nes_debug(NES_DBG_CM, "skb set to NULL\n");
203 return -1;
204 }
205
206 /* send an MPA Request frame */
207 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
208 cm_node->mpa_frame_size, SET_ACK);
209
210 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
211 if (ret < 0)
212 return ret;
213
214 return 0;
215 }
216
217
218 /**
219 * recv_mpa - process a received TCP pkt, we are expecting an
220 * IETF MPA frame
221 */
222 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len)
223 {
224 struct ietf_mpa_frame *mpa_frame;
225
226 /* assume req frame is in tcp data payload */
227 if (len < sizeof(struct ietf_mpa_frame)) {
228 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
229 return -1;
230 }
231
232 mpa_frame = (struct ietf_mpa_frame *)buffer;
233 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
234
235 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
236 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
237 " complete (%x + %x != %x)\n",
238 cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len);
239 return -1;
240 }
241
242 /* copy entire MPA frame to our cm_node's frame */
243 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
244 cm_node->mpa_frame_size);
245
246 return 0;
247 }
248
249
250 /**
251 * form_cm_frame - get a free packet and build empty frame Use
252 * node info to build.
253 */
254 static struct sk_buff *form_cm_frame(struct sk_buff *skb,
255 struct nes_cm_node *cm_node, void *options, u32 optionsize,
256 void *data, u32 datasize, u8 flags)
257 {
258 struct tcphdr *tcph;
259 struct iphdr *iph;
260 struct ethhdr *ethh;
261 u8 *buf;
262 u16 packetsize = sizeof(*iph);
263
264 packetsize += sizeof(*tcph);
265 packetsize += optionsize + datasize;
266
267 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
268
269 skb->len = 0;
270 buf = skb_put(skb, packetsize + ETH_HLEN);
271
272 ethh = (struct ethhdr *) buf;
273 buf += ETH_HLEN;
274
275 iph = (struct iphdr *)buf;
276 buf += sizeof(*iph);
277 tcph = (struct tcphdr *)buf;
278 skb_reset_mac_header(skb);
279 skb_set_network_header(skb, ETH_HLEN);
280 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
281 buf += sizeof(*tcph);
282
283 skb->ip_summed = CHECKSUM_PARTIAL;
284 skb->protocol = htons(0x800);
285 skb->data_len = 0;
286 skb->mac_len = ETH_HLEN;
287
288 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
289 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
290 ethh->h_proto = htons(0x0800);
291
292 iph->version = IPVERSION;
293 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
294 iph->tos = 0;
295 iph->tot_len = htons(packetsize);
296 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
297
298 iph->frag_off = htons(0x4000);
299 iph->ttl = 0x40;
300 iph->protocol = 0x06; /* IPPROTO_TCP */
301
302 iph->saddr = htonl(cm_node->loc_addr);
303 iph->daddr = htonl(cm_node->rem_addr);
304
305 tcph->source = htons(cm_node->loc_port);
306 tcph->dest = htons(cm_node->rem_port);
307 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
308
309 if (flags & SET_ACK) {
310 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
311 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
312 tcph->ack = 1;
313 } else
314 tcph->ack_seq = 0;
315
316 if (flags & SET_SYN) {
317 cm_node->tcp_cntxt.loc_seq_num++;
318 tcph->syn = 1;
319 } else
320 cm_node->tcp_cntxt.loc_seq_num += datasize;
321
322 if (flags & SET_FIN) {
323 cm_node->tcp_cntxt.loc_seq_num++;
324 tcph->fin = 1;
325 }
326
327 if (flags & SET_RST)
328 tcph->rst = 1;
329
330 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
331 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
332 tcph->urg_ptr = 0;
333 if (optionsize)
334 memcpy(buf, options, optionsize);
335 buf += optionsize;
336 if (datasize)
337 memcpy(buf, data, datasize);
338
339 skb_shinfo(skb)->nr_frags = 0;
340 cm_packets_created++;
341
342 return skb;
343 }
344
345
346 /**
347 * print_core - dump a cm core
348 */
349 static void print_core(struct nes_cm_core *core)
350 {
351 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
352 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
353 if (!core)
354 return;
355 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
356
357 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
358
359 nes_debug(NES_DBG_CM, "Tx Free cnt : %u \n", skb_queue_len(&core->tx_free_list));
360 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
361 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
362
363 nes_debug(NES_DBG_CM, "core : %p \n", core);
364
365 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
366 }
367
368
369 /**
370 * schedule_nes_timer
371 * note - cm_node needs to be protected before calling this. Encase in:
372 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
373 */
374 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
375 enum nes_timer_type type, int send_retrans,
376 int close_when_complete)
377 {
378 unsigned long flags;
379 struct nes_cm_core *cm_core = cm_node->cm_core;
380 struct nes_timer_entry *new_send;
381 int ret = 0;
382 u32 was_timer_set;
383
384 if (!cm_node)
385 return -EINVAL;
386 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
387 if (!new_send)
388 return -1;
389
390 /* new_send->timetosend = currenttime */
391 new_send->retrycount = NES_DEFAULT_RETRYS;
392 new_send->retranscount = NES_DEFAULT_RETRANS;
393 new_send->skb = skb;
394 new_send->timetosend = jiffies;
395 new_send->type = type;
396 new_send->netdev = cm_node->netdev;
397 new_send->send_retrans = send_retrans;
398 new_send->close_when_complete = close_when_complete;
399
400 if (type == NES_TIMER_TYPE_CLOSE) {
401 new_send->timetosend += (HZ/10);
402 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
403 list_add_tail(&new_send->list, &cm_node->recv_list);
404 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
405 }
406
407 if (type == NES_TIMER_TYPE_SEND) {
408 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
409 atomic_inc(&new_send->skb->users);
410 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
411 cm_node->send_entry = new_send;
412 add_ref_cm_node(cm_node);
413 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
414 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
415
416 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
417 if (ret != NETDEV_TX_OK) {
418 nes_debug(NES_DBG_CM, "Error sending packet %p "
419 "(jiffies = %lu)\n", new_send, jiffies);
420 atomic_dec(&new_send->skb->users);
421 new_send->timetosend = jiffies;
422 } else {
423 cm_packets_sent++;
424 if (!send_retrans) {
425 cleanup_retrans_entry(cm_node);
426 if (close_when_complete)
427 rem_ref_cm_node(cm_core, cm_node);
428 return ret;
429 }
430 }
431 }
432
433 was_timer_set = timer_pending(&cm_core->tcp_timer);
434
435 if (!was_timer_set) {
436 cm_core->tcp_timer.expires = new_send->timetosend;
437 add_timer(&cm_core->tcp_timer);
438 }
439
440 return ret;
441 }
442
443
444 /**
445 * nes_cm_timer_tick
446 */
447 static void nes_cm_timer_tick(unsigned long pass)
448 {
449 unsigned long flags, qplockflags;
450 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
451 struct iw_cm_id *cm_id;
452 struct nes_cm_node *cm_node;
453 struct nes_timer_entry *send_entry, *recv_entry;
454 struct list_head *list_core, *list_core_temp;
455 struct list_head *list_node, *list_node_temp;
456 struct nes_cm_core *cm_core = g_cm_core;
457 struct nes_qp *nesqp;
458 u32 settimer = 0;
459 int ret = NETDEV_TX_OK;
460 enum nes_cm_node_state last_state;
461
462 struct list_head timer_list;
463 INIT_LIST_HEAD(&timer_list);
464 spin_lock_irqsave(&cm_core->ht_lock, flags);
465
466 list_for_each_safe(list_node, list_core_temp,
467 &cm_core->connected_nodes) {
468 cm_node = container_of(list_node, struct nes_cm_node, list);
469 if (!list_empty(&cm_node->recv_list) || (cm_node->send_entry)) {
470 add_ref_cm_node(cm_node);
471 list_add(&cm_node->timer_entry, &timer_list);
472 }
473 }
474 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
475
476 list_for_each_safe(list_node, list_core_temp, &timer_list) {
477 cm_node = container_of(list_node, struct nes_cm_node,
478 timer_entry);
479 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
480 list_for_each_safe(list_core, list_node_temp,
481 &cm_node->recv_list) {
482 recv_entry = container_of(list_core,
483 struct nes_timer_entry, list);
484 if (!recv_entry)
485 break;
486 if (time_after(recv_entry->timetosend, jiffies)) {
487 if (nexttimeout > recv_entry->timetosend ||
488 !settimer) {
489 nexttimeout = recv_entry->timetosend;
490 settimer = 1;
491 }
492 continue;
493 }
494 list_del(&recv_entry->list);
495 cm_id = cm_node->cm_id;
496 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
497 nesqp = (struct nes_qp *)recv_entry->skb;
498 spin_lock_irqsave(&nesqp->lock, qplockflags);
499 if (nesqp->cm_id) {
500 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
501 "refcount = %d: HIT A "
502 "NES_TIMER_TYPE_CLOSE with something "
503 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
504 atomic_read(&nesqp->refcount));
505 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
506 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
507 nesqp->ibqp_state = IB_QPS_ERR;
508 spin_unlock_irqrestore(&nesqp->lock,
509 qplockflags);
510 nes_cm_disconn(nesqp);
511 } else {
512 spin_unlock_irqrestore(&nesqp->lock,
513 qplockflags);
514 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
515 "refcount = %d: HIT A "
516 "NES_TIMER_TYPE_CLOSE with nothing "
517 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
518 atomic_read(&nesqp->refcount));
519 }
520 if (cm_id)
521 cm_id->rem_ref(cm_id);
522
523 kfree(recv_entry);
524 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
525 }
526 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
527
528 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
529 do {
530 send_entry = cm_node->send_entry;
531 if (!send_entry)
532 break;
533 if (time_after(send_entry->timetosend, jiffies)) {
534 if (cm_node->state != NES_CM_STATE_TSA) {
535 if ((nexttimeout >
536 send_entry->timetosend) ||
537 !settimer) {
538 nexttimeout =
539 send_entry->timetosend;
540 settimer = 1;
541 break;
542 }
543 } else {
544 free_retrans_entry(cm_node);
545 break;
546 }
547 }
548
549 if ((cm_node->state == NES_CM_STATE_TSA) ||
550 (cm_node->state == NES_CM_STATE_CLOSED)) {
551 free_retrans_entry(cm_node);
552 break;
553 }
554
555 if (!send_entry->retranscount ||
556 !send_entry->retrycount) {
557 cm_packets_dropped++;
558 last_state = cm_node->state;
559 cm_node->state = NES_CM_STATE_CLOSED;
560 free_retrans_entry(cm_node);
561 spin_unlock_irqrestore(
562 &cm_node->retrans_list_lock, flags);
563 if (last_state == NES_CM_STATE_SYN_RCVD)
564 rem_ref_cm_node(cm_core, cm_node);
565 else
566 create_event(cm_node,
567 NES_CM_EVENT_ABORTED);
568 spin_lock_irqsave(&cm_node->retrans_list_lock,
569 flags);
570 break;
571 }
572 atomic_inc(&send_entry->skb->users);
573 cm_packets_retrans++;
574 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
575 "for node %p, jiffies = %lu, time to send = "
576 "%lu, retranscount = %u, send_entry->seq_num = "
577 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
578 "0x%08X\n", send_entry, cm_node, jiffies,
579 send_entry->timetosend,
580 send_entry->retranscount,
581 send_entry->seq_num,
582 cm_node->tcp_cntxt.rem_ack_num);
583
584 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
585 flags);
586 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
587 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
588 if (ret != NETDEV_TX_OK) {
589 nes_debug(NES_DBG_CM, "rexmit failed for "
590 "node=%p\n", cm_node);
591 cm_packets_bounced++;
592 atomic_dec(&send_entry->skb->users);
593 send_entry->retrycount--;
594 nexttimeout = jiffies + NES_SHORT_TIME;
595 settimer = 1;
596 break;
597 } else {
598 cm_packets_sent++;
599 }
600 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
601 "%u, retry count = %u.\n",
602 send_entry->retranscount,
603 send_entry->retrycount);
604 if (send_entry->send_retrans) {
605 send_entry->retranscount--;
606 send_entry->timetosend = jiffies +
607 NES_RETRY_TIMEOUT;
608 if (nexttimeout > send_entry->timetosend ||
609 !settimer) {
610 nexttimeout = send_entry->timetosend;
611 settimer = 1;
612 }
613 } else {
614 int close_when_complete;
615 close_when_complete =
616 send_entry->close_when_complete;
617 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
618 cm_node, cm_node->state);
619 free_retrans_entry(cm_node);
620 if (close_when_complete)
621 rem_ref_cm_node(cm_node->cm_core,
622 cm_node);
623 }
624 } while (0);
625
626 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
627 rem_ref_cm_node(cm_node->cm_core, cm_node);
628 if (ret != NETDEV_TX_OK) {
629 nes_debug(NES_DBG_CM, "rexmit failed for cm_node=%p\n",
630 cm_node);
631 break;
632 }
633 }
634
635 if (settimer) {
636 if (!timer_pending(&cm_core->tcp_timer)) {
637 cm_core->tcp_timer.expires = nexttimeout;
638 add_timer(&cm_core->tcp_timer);
639 }
640 }
641 }
642
643
644 /**
645 * send_syn
646 */
647 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
648 struct sk_buff *skb)
649 {
650 int ret;
651 int flags = SET_SYN;
652 char optionsbuffer[sizeof(struct option_mss) +
653 sizeof(struct option_windowscale) + sizeof(struct option_base) +
654 TCP_OPTIONS_PADDING];
655
656 int optionssize = 0;
657 /* Sending MSS option */
658 union all_known_options *options;
659
660 if (!cm_node)
661 return -EINVAL;
662
663 options = (union all_known_options *)&optionsbuffer[optionssize];
664 options->as_mss.optionnum = OPTION_NUMBER_MSS;
665 options->as_mss.length = sizeof(struct option_mss);
666 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
667 optionssize += sizeof(struct option_mss);
668
669 options = (union all_known_options *)&optionsbuffer[optionssize];
670 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
671 options->as_windowscale.length = sizeof(struct option_windowscale);
672 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
673 optionssize += sizeof(struct option_windowscale);
674
675 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
676 options = (union all_known_options *)&optionsbuffer[optionssize];
677 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
678 options->as_base.length = sizeof(struct option_base);
679 optionssize += sizeof(struct option_base);
680 /* we need the size to be a multiple of 4 */
681 options = (union all_known_options *)&optionsbuffer[optionssize];
682 options->as_end = 1;
683 optionssize += 1;
684 options = (union all_known_options *)&optionsbuffer[optionssize];
685 options->as_end = 1;
686 optionssize += 1;
687 }
688
689 options = (union all_known_options *)&optionsbuffer[optionssize];
690 options->as_end = OPTION_NUMBER_END;
691 optionssize += 1;
692
693 if (!skb)
694 skb = get_free_pkt(cm_node);
695 if (!skb) {
696 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
697 return -1;
698 }
699
700 if (sendack)
701 flags |= SET_ACK;
702
703 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
704 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
705
706 return ret;
707 }
708
709
710 /**
711 * send_reset
712 */
713 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
714 {
715 int ret;
716 int flags = SET_RST | SET_ACK;
717
718 if (!skb)
719 skb = get_free_pkt(cm_node);
720 if (!skb) {
721 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
722 return -1;
723 }
724
725 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
726 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
727
728 return ret;
729 }
730
731
732 /**
733 * send_ack
734 */
735 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
736 {
737 int ret;
738
739 if (!skb)
740 skb = get_free_pkt(cm_node);
741
742 if (!skb) {
743 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
744 return -1;
745 }
746
747 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
748 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
749
750 return ret;
751 }
752
753
754 /**
755 * send_fin
756 */
757 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
758 {
759 int ret;
760
761 /* if we didn't get a frame get one */
762 if (!skb)
763 skb = get_free_pkt(cm_node);
764
765 if (!skb) {
766 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
767 return -1;
768 }
769
770 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
771 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
772
773 return ret;
774 }
775
776
777 /**
778 * get_free_pkt
779 */
780 static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node)
781 {
782 struct sk_buff *skb, *new_skb;
783
784 /* check to see if we need to repopulate the free tx pkt queue */
785 if (skb_queue_len(&cm_node->cm_core->tx_free_list) < NES_CM_FREE_PKT_LO_WATERMARK) {
786 while (skb_queue_len(&cm_node->cm_core->tx_free_list) <
787 cm_node->cm_core->free_tx_pkt_max) {
788 /* replace the frame we took, we won't get it back */
789 new_skb = dev_alloc_skb(cm_node->cm_core->mtu);
790 BUG_ON(!new_skb);
791 /* add a replacement frame to the free tx list head */
792 skb_queue_head(&cm_node->cm_core->tx_free_list, new_skb);
793 }
794 }
795
796 skb = skb_dequeue(&cm_node->cm_core->tx_free_list);
797
798 return skb;
799 }
800
801
802 /**
803 * make_hashkey - generate hash key from node tuple
804 */
805 static inline int make_hashkey(u16 loc_port, nes_addr_t loc_addr, u16 rem_port,
806 nes_addr_t rem_addr)
807 {
808 u32 hashkey = 0;
809
810 hashkey = loc_addr + rem_addr + loc_port + rem_port;
811 hashkey = (hashkey % NES_CM_HASHTABLE_SIZE);
812
813 return hashkey;
814 }
815
816
817 /**
818 * find_node - find a cm node that matches the reference cm node
819 */
820 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
821 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
822 {
823 unsigned long flags;
824 u32 hashkey;
825 struct list_head *hte;
826 struct nes_cm_node *cm_node;
827
828 /* make a hash index key for this packet */
829 hashkey = make_hashkey(loc_port, loc_addr, rem_port, rem_addr);
830
831 /* get a handle on the hte */
832 hte = &cm_core->connected_nodes;
833
834 nes_debug(NES_DBG_CM, "Searching for an owner node: " NIPQUAD_FMT ":%x from core %p->%p\n",
835 HIPQUAD(loc_addr), loc_port, cm_core, hte);
836
837 /* walk list and find cm_node associated with this session ID */
838 spin_lock_irqsave(&cm_core->ht_lock, flags);
839 list_for_each_entry(cm_node, hte, list) {
840 /* compare quad, return node handle if a match */
841 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
842 cm_node->loc_addr, cm_node->loc_port,
843 loc_addr, loc_port,
844 cm_node->rem_addr, cm_node->rem_port,
845 rem_addr, rem_port);
846 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
847 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
848 add_ref_cm_node(cm_node);
849 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
850 return cm_node;
851 }
852 }
853 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
854
855 /* no owner node */
856 return NULL;
857 }
858
859
860 /**
861 * find_listener - find a cm node listening on this addr-port pair
862 */
863 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
864 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
865 {
866 unsigned long flags;
867 struct nes_cm_listener *listen_node;
868
869 /* walk list and find cm_node associated with this session ID */
870 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
871 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
872 /* compare node pair, return node handle if a match */
873 if (((listen_node->loc_addr == dst_addr) ||
874 listen_node->loc_addr == 0x00000000) &&
875 (listen_node->loc_port == dst_port) &&
876 (listener_state & listen_node->listener_state)) {
877 atomic_inc(&listen_node->ref_count);
878 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
879 return listen_node;
880 }
881 }
882 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
883
884 nes_debug(NES_DBG_CM, "Unable to find listener for " NIPQUAD_FMT ":%x\n",
885 HIPQUAD(dst_addr), dst_port);
886
887 /* no listener */
888 return NULL;
889 }
890
891
892 /**
893 * add_hte_node - add a cm node to the hash table
894 */
895 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
896 {
897 unsigned long flags;
898 u32 hashkey;
899 struct list_head *hte;
900
901 if (!cm_node || !cm_core)
902 return -EINVAL;
903
904 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
905 cm_node);
906
907 /* first, make an index into our hash table */
908 hashkey = make_hashkey(cm_node->loc_port, cm_node->loc_addr,
909 cm_node->rem_port, cm_node->rem_addr);
910 cm_node->hashkey = hashkey;
911
912 spin_lock_irqsave(&cm_core->ht_lock, flags);
913
914 /* get a handle on the hash table element (list head for this slot) */
915 hte = &cm_core->connected_nodes;
916 list_add_tail(&cm_node->list, hte);
917 atomic_inc(&cm_core->ht_node_cnt);
918
919 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
920
921 return 0;
922 }
923
924
925 /**
926 * mini_cm_dec_refcnt_listen
927 */
928 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
929 struct nes_cm_listener *listener, int free_hanging_nodes)
930 {
931 int ret = 1;
932 unsigned long flags;
933 struct list_head *list_pos = NULL;
934 struct list_head *list_temp = NULL;
935 struct nes_cm_node *cm_node = NULL;
936 struct list_head reset_list;
937
938 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
939 "refcnt=%d\n", listener, free_hanging_nodes,
940 atomic_read(&listener->ref_count));
941 /* free non-accelerated child nodes for this listener */
942 INIT_LIST_HEAD(&reset_list);
943 if (free_hanging_nodes) {
944 spin_lock_irqsave(&cm_core->ht_lock, flags);
945 list_for_each_safe(list_pos, list_temp,
946 &g_cm_core->connected_nodes) {
947 cm_node = container_of(list_pos, struct nes_cm_node,
948 list);
949 if ((cm_node->listener == listener) &&
950 (!cm_node->accelerated)) {
951 add_ref_cm_node(cm_node);
952 list_add(&cm_node->reset_entry, &reset_list);
953 }
954 }
955 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
956 }
957
958 list_for_each_safe(list_pos, list_temp, &reset_list) {
959 cm_node = container_of(list_pos, struct nes_cm_node,
960 reset_entry);
961 cleanup_retrans_entry(cm_node);
962 send_reset(cm_node, NULL);
963 rem_ref_cm_node(cm_node->cm_core, cm_node);
964 }
965
966 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
967 if (!atomic_dec_return(&listener->ref_count)) {
968 list_del(&listener->list);
969
970 /* decrement our listen node count */
971 atomic_dec(&cm_core->listen_node_cnt);
972
973 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
974
975 if (listener->nesvnic) {
976 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
977 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
978 }
979
980 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
981
982 kfree(listener);
983 listener = NULL;
984 ret = 0;
985 cm_listens_destroyed++;
986 } else {
987 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
988 }
989 if (listener) {
990 if (atomic_read(&listener->pend_accepts_cnt) > 0)
991 nes_debug(NES_DBG_CM, "destroying listener (%p)"
992 " with non-zero pending accepts=%u\n",
993 listener, atomic_read(&listener->pend_accepts_cnt));
994 }
995
996 return ret;
997 }
998
999
1000 /**
1001 * mini_cm_del_listen
1002 */
1003 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1004 struct nes_cm_listener *listener)
1005 {
1006 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1007 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1008 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1009 }
1010
1011
1012 /**
1013 * mini_cm_accelerated
1014 */
1015 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1016 struct nes_cm_node *cm_node)
1017 {
1018 u32 was_timer_set;
1019 cm_node->accelerated = 1;
1020
1021 if (cm_node->accept_pend) {
1022 BUG_ON(!cm_node->listener);
1023 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1024 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1025 }
1026
1027 was_timer_set = timer_pending(&cm_core->tcp_timer);
1028 if (!was_timer_set) {
1029 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1030 add_timer(&cm_core->tcp_timer);
1031 }
1032
1033 return 0;
1034 }
1035
1036
1037 /**
1038 * nes_addr_resolve_neigh
1039 */
1040 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
1041 {
1042 struct rtable *rt;
1043 struct flowi fl;
1044 struct neighbour *neigh;
1045 int rc = -1;
1046 DECLARE_MAC_BUF(mac);
1047
1048 memset(&fl, 0, sizeof fl);
1049 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1050 if (ip_route_output_key(&init_net, &rt, &fl)) {
1051 printk("%s: ip_route_output_key failed for 0x%08X\n",
1052 __func__, dst_ip);
1053 return rc;
1054 }
1055
1056 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1057 if (neigh) {
1058 if (neigh->nud_state & NUD_VALID) {
1059 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1060 " is %s, Gateway is 0x%08X \n", dst_ip,
1061 print_mac(mac, neigh->ha), ntohl(rt->rt_gateway));
1062 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1063 dst_ip, NES_ARP_ADD);
1064 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1065 NES_ARP_RESOLVE);
1066 }
1067 neigh_release(neigh);
1068 }
1069
1070 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1071 neigh_event_send(rt->u.dst.neighbour, NULL);
1072
1073 ip_rt_put(rt);
1074 return rc;
1075 }
1076
1077
1078 /**
1079 * make_cm_node - create a new instance of a cm node
1080 */
1081 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1082 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1083 struct nes_cm_listener *listener)
1084 {
1085 struct nes_cm_node *cm_node;
1086 struct timespec ts;
1087 int arpindex = 0;
1088 struct nes_device *nesdev;
1089 struct nes_adapter *nesadapter;
1090 DECLARE_MAC_BUF(mac);
1091
1092 /* create an hte and cm_node for this instance */
1093 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1094 if (!cm_node)
1095 return NULL;
1096
1097 /* set our node specific transport info */
1098 cm_node->loc_addr = cm_info->loc_addr;
1099 cm_node->rem_addr = cm_info->rem_addr;
1100 cm_node->loc_port = cm_info->loc_port;
1101 cm_node->rem_port = cm_info->rem_port;
1102 cm_node->send_write0 = send_first;
1103 nes_debug(NES_DBG_CM, "Make node addresses : loc = " NIPQUAD_FMT
1104 ":%x, rem = " NIPQUAD_FMT ":%x\n",
1105 HIPQUAD(cm_node->loc_addr), cm_node->loc_port,
1106 HIPQUAD(cm_node->rem_addr), cm_node->rem_port);
1107 cm_node->listener = listener;
1108 cm_node->netdev = nesvnic->netdev;
1109 cm_node->cm_id = cm_info->cm_id;
1110 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1111
1112 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1113 cm_node->cm_id);
1114
1115 spin_lock_init(&cm_node->retrans_list_lock);
1116 INIT_LIST_HEAD(&cm_node->recv_list);
1117 spin_lock_init(&cm_node->recv_list_lock);
1118
1119 cm_node->loopbackpartner = NULL;
1120 atomic_set(&cm_node->ref_count, 1);
1121 /* associate our parent CM core */
1122 cm_node->cm_core = cm_core;
1123 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1124 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1125 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1126 NES_CM_DEFAULT_RCV_WND_SCALE;
1127 ts = current_kernel_time();
1128 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1129 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1130 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1131 cm_node->tcp_cntxt.rcv_nxt = 0;
1132 /* get a unique session ID , add thread_id to an upcounter to handle race */
1133 atomic_inc(&cm_core->node_cnt);
1134 cm_node->conn_type = cm_info->conn_type;
1135 cm_node->apbvt_set = 0;
1136 cm_node->accept_pend = 0;
1137
1138 cm_node->nesvnic = nesvnic;
1139 /* get some device handles, for arp lookup */
1140 nesdev = nesvnic->nesdev;
1141 nesadapter = nesdev->nesadapter;
1142
1143 cm_node->loopbackpartner = NULL;
1144 /* get the mac addr for the remote node */
1145 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1146 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1147 else
1148 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1149 if (arpindex < 0) {
1150 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1151 if (arpindex < 0) {
1152 kfree(cm_node);
1153 return NULL;
1154 }
1155 }
1156
1157 /* copy the mac addr to node context */
1158 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1159 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %s\n",
1160 print_mac(mac, cm_node->rem_mac));
1161
1162 add_hte_node(cm_core, cm_node);
1163 atomic_inc(&cm_nodes_created);
1164
1165 return cm_node;
1166 }
1167
1168
1169 /**
1170 * add_ref_cm_node - destroy an instance of a cm node
1171 */
1172 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1173 {
1174 atomic_inc(&cm_node->ref_count);
1175 return 0;
1176 }
1177
1178
1179 /**
1180 * rem_ref_cm_node - destroy an instance of a cm node
1181 */
1182 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1183 struct nes_cm_node *cm_node)
1184 {
1185 unsigned long flags, qplockflags;
1186 struct nes_timer_entry *recv_entry;
1187 struct iw_cm_id *cm_id;
1188 struct list_head *list_core, *list_node_temp;
1189 struct nes_qp *nesqp;
1190
1191 if (!cm_node)
1192 return -EINVAL;
1193
1194 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1195 if (atomic_dec_return(&cm_node->ref_count)) {
1196 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1197 return 0;
1198 }
1199 list_del(&cm_node->list);
1200 atomic_dec(&cm_core->ht_node_cnt);
1201 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1202
1203 /* if the node is destroyed before connection was accelerated */
1204 if (!cm_node->accelerated && cm_node->accept_pend) {
1205 BUG_ON(!cm_node->listener);
1206 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1207 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1208 }
1209 BUG_ON(cm_node->send_entry);
1210 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1211 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
1212 recv_entry = container_of(list_core, struct nes_timer_entry,
1213 list);
1214 list_del(&recv_entry->list);
1215 cm_id = cm_node->cm_id;
1216 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1217 nesqp = (struct nes_qp *)recv_entry->skb;
1218 spin_lock_irqsave(&nesqp->lock, qplockflags);
1219 if (nesqp->cm_id) {
1220 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1221 "NES_TIMER_TYPE_CLOSE with something to do!\n",
1222 nesqp->hwqp.qp_id, cm_id);
1223 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1224 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1225 nesqp->ibqp_state = IB_QPS_ERR;
1226 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1227 nes_cm_disconn(nesqp);
1228 } else {
1229 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1230 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1231 "NES_TIMER_TYPE_CLOSE with nothing to do!\n",
1232 nesqp->hwqp.qp_id, cm_id);
1233 }
1234 cm_id->rem_ref(cm_id);
1235
1236 kfree(recv_entry);
1237 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1238 }
1239 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1240
1241 if (cm_node->listener) {
1242 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1243 } else {
1244 if (cm_node->apbvt_set && cm_node->nesvnic) {
1245 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1246 PCI_FUNC(
1247 cm_node->nesvnic->nesdev->pcidev->devfn),
1248 NES_MANAGE_APBVT_DEL);
1249 }
1250 }
1251
1252 atomic_dec(&cm_core->node_cnt);
1253 atomic_inc(&cm_nodes_destroyed);
1254 nesqp = cm_node->nesqp;
1255 if (nesqp) {
1256 nesqp->cm_node = NULL;
1257 nes_rem_ref(&nesqp->ibqp);
1258 cm_node->nesqp = NULL;
1259 }
1260
1261 cm_node->freed = 1;
1262 kfree(cm_node);
1263 return 0;
1264 }
1265
1266 /**
1267 * process_options
1268 */
1269 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1270 u32 optionsize, u32 syn_packet)
1271 {
1272 u32 tmp;
1273 u32 offset = 0;
1274 union all_known_options *all_options;
1275 char got_mss_option = 0;
1276
1277 while (offset < optionsize) {
1278 all_options = (union all_known_options *)(optionsloc + offset);
1279 switch (all_options->as_base.optionnum) {
1280 case OPTION_NUMBER_END:
1281 offset = optionsize;
1282 break;
1283 case OPTION_NUMBER_NONE:
1284 offset += 1;
1285 continue;
1286 case OPTION_NUMBER_MSS:
1287 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1288 "Size: %d\n", __func__,
1289 all_options->as_mss.length, offset, optionsize);
1290 got_mss_option = 1;
1291 if (all_options->as_mss.length != 4) {
1292 return 1;
1293 } else {
1294 tmp = ntohs(all_options->as_mss.mss);
1295 if (tmp > 0 && tmp <
1296 cm_node->tcp_cntxt.mss)
1297 cm_node->tcp_cntxt.mss = tmp;
1298 }
1299 break;
1300 case OPTION_NUMBER_WINDOW_SCALE:
1301 cm_node->tcp_cntxt.snd_wscale =
1302 all_options->as_windowscale.shiftcount;
1303 break;
1304 case OPTION_NUMBER_WRITE0:
1305 cm_node->send_write0 = 1;
1306 break;
1307 default:
1308 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1309 all_options->as_base.optionnum);
1310 break;
1311 }
1312 offset += all_options->as_base.length;
1313 }
1314 if ((!got_mss_option) && (syn_packet))
1315 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1316 return 0;
1317 }
1318
1319 static void drop_packet(struct sk_buff *skb)
1320 {
1321 atomic_inc(&cm_accel_dropped_pkts);
1322 dev_kfree_skb_any(skb);
1323 }
1324
1325 static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1326 struct tcphdr *tcph)
1327 {
1328 atomic_inc(&cm_resets_recvd);
1329 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1330 "refcnt=%d\n", cm_node, cm_node->state,
1331 atomic_read(&cm_node->ref_count));
1332 cm_node->tcp_cntxt.rcv_nxt++;
1333 cleanup_retrans_entry(cm_node);
1334 switch (cm_node->state) {
1335 case NES_CM_STATE_SYN_RCVD:
1336 case NES_CM_STATE_SYN_SENT:
1337 case NES_CM_STATE_ESTABLISHED:
1338 case NES_CM_STATE_MPAREQ_SENT:
1339 cm_node->state = NES_CM_STATE_LAST_ACK;
1340 send_fin(cm_node, skb);
1341 break;
1342 case NES_CM_STATE_FIN_WAIT1:
1343 cm_node->state = NES_CM_STATE_CLOSING;
1344 send_ack(cm_node, skb);
1345 break;
1346 case NES_CM_STATE_FIN_WAIT2:
1347 cm_node->state = NES_CM_STATE_TIME_WAIT;
1348 send_ack(cm_node, skb);
1349 cm_node->state = NES_CM_STATE_CLOSED;
1350 break;
1351 case NES_CM_STATE_TSA:
1352 default:
1353 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1354 cm_node, cm_node->state);
1355 drop_packet(skb);
1356 break;
1357 }
1358 }
1359
1360
1361 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1362 struct tcphdr *tcph)
1363 {
1364
1365 int reset = 0; /* whether to send reset in case of err.. */
1366 int passive_state;
1367 atomic_inc(&cm_resets_recvd);
1368 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1369 " refcnt=%d\n", cm_node, cm_node->state,
1370 atomic_read(&cm_node->ref_count));
1371 cleanup_retrans_entry(cm_node);
1372 switch (cm_node->state) {
1373 case NES_CM_STATE_SYN_SENT:
1374 case NES_CM_STATE_MPAREQ_SENT:
1375 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1376 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1377 cm_node->listener, cm_node->state);
1378 active_open_err(cm_node, skb, reset);
1379 break;
1380 case NES_CM_STATE_MPAREQ_RCVD:
1381 passive_state = atomic_add_return(1, &cm_node->passive_state);
1382 if (passive_state == NES_SEND_RESET_EVENT)
1383 create_event(cm_node, NES_CM_EVENT_RESET);
1384 cleanup_retrans_entry(cm_node);
1385 cm_node->state = NES_CM_STATE_CLOSED;
1386 dev_kfree_skb_any(skb);
1387 break;
1388 case NES_CM_STATE_ESTABLISHED:
1389 case NES_CM_STATE_SYN_RCVD:
1390 case NES_CM_STATE_LISTENING:
1391 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1392 passive_open_err(cm_node, skb, reset);
1393 break;
1394 case NES_CM_STATE_TSA:
1395 active_open_err(cm_node, skb, reset);
1396 break;
1397 case NES_CM_STATE_CLOSED:
1398 cleanup_retrans_entry(cm_node);
1399 drop_packet(skb);
1400 break;
1401 default:
1402 drop_packet(skb);
1403 break;
1404 }
1405 }
1406
1407 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb,
1408 enum nes_cm_event_type type)
1409 {
1410
1411 int ret;
1412 int datasize = skb->len;
1413 u8 *dataloc = skb->data;
1414 ret = parse_mpa(cm_node, dataloc, datasize);
1415 if (ret < 0) {
1416 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1417 if (type == NES_CM_EVENT_CONNECTED) {
1418 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1419 "cm_node=%p listener=%p state=%d\n", __func__,
1420 __LINE__, cm_node, cm_node->listener,
1421 cm_node->state);
1422 active_open_err(cm_node, skb, 1);
1423 } else {
1424 passive_open_err(cm_node, skb, 1);
1425 }
1426 } else {
1427 cleanup_retrans_entry(cm_node);
1428 dev_kfree_skb_any(skb);
1429 if (type == NES_CM_EVENT_CONNECTED)
1430 cm_node->state = NES_CM_STATE_TSA;
1431 else
1432 atomic_set(&cm_node->passive_state,
1433 NES_PASSIVE_STATE_INDICATED);
1434 create_event(cm_node, type);
1435
1436 }
1437 return ;
1438 }
1439
1440 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1441 {
1442 switch (cm_node->state) {
1443 case NES_CM_STATE_SYN_SENT:
1444 case NES_CM_STATE_MPAREQ_SENT:
1445 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1446 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1447 cm_node->listener, cm_node->state);
1448 active_open_err(cm_node, skb, 1);
1449 break;
1450 case NES_CM_STATE_ESTABLISHED:
1451 case NES_CM_STATE_SYN_RCVD:
1452 passive_open_err(cm_node, skb, 1);
1453 break;
1454 case NES_CM_STATE_TSA:
1455 default:
1456 drop_packet(skb);
1457 }
1458 }
1459
1460 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1461 struct sk_buff *skb)
1462 {
1463 int err;
1464
1465 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1466 if (err)
1467 active_open_err(cm_node, skb, 1);
1468
1469 return err;
1470 }
1471
1472 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1473 struct sk_buff *skb)
1474 {
1475 int err = 0;
1476 u32 seq;
1477 u32 ack_seq;
1478 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1479 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1480 u32 rcv_wnd;
1481 seq = ntohl(tcph->seq);
1482 ack_seq = ntohl(tcph->ack_seq);
1483 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1484 if (ack_seq != loc_seq_num)
1485 err = 1;
1486 else if ((seq + rcv_wnd) < rcv_nxt)
1487 err = 1;
1488 if (err) {
1489 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1490 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1491 cm_node->listener, cm_node->state);
1492 indicate_pkt_err(cm_node, skb);
1493 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1494 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1495 rcv_wnd);
1496 }
1497 return err;
1498 }
1499
1500 /*
1501 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1502 * is created with a listener or it may comein as rexmitted packet which in
1503 * that case will be just dropped.
1504 */
1505
1506 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1507 struct tcphdr *tcph)
1508 {
1509 int ret;
1510 u32 inc_sequence;
1511 int optionsize;
1512
1513 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1514 skb_trim(skb, 0);
1515 inc_sequence = ntohl(tcph->seq);
1516
1517 switch (cm_node->state) {
1518 case NES_CM_STATE_SYN_SENT:
1519 case NES_CM_STATE_MPAREQ_SENT:
1520 /* Rcvd syn on active open connection*/
1521 active_open_err(cm_node, skb, 1);
1522 break;
1523 case NES_CM_STATE_LISTENING:
1524 /* Passive OPEN */
1525 cm_node->accept_pend = 1;
1526 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1527 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1528 cm_node->listener->backlog) {
1529 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1530 "pressure \n");
1531 cm_backlog_drops++;
1532 passive_open_err(cm_node, skb, 0);
1533 break;
1534 }
1535 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1536 1);
1537 if (ret) {
1538 passive_open_err(cm_node, skb, 0);
1539 /* drop pkt */
1540 break;
1541 }
1542 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1543 BUG_ON(cm_node->send_entry);
1544 cm_node->state = NES_CM_STATE_SYN_RCVD;
1545 send_syn(cm_node, 1, skb);
1546 break;
1547 case NES_CM_STATE_CLOSED:
1548 cleanup_retrans_entry(cm_node);
1549 send_reset(cm_node, skb);
1550 break;
1551 case NES_CM_STATE_TSA:
1552 case NES_CM_STATE_ESTABLISHED:
1553 case NES_CM_STATE_FIN_WAIT1:
1554 case NES_CM_STATE_FIN_WAIT2:
1555 case NES_CM_STATE_MPAREQ_RCVD:
1556 case NES_CM_STATE_LAST_ACK:
1557 case NES_CM_STATE_CLOSING:
1558 case NES_CM_STATE_UNKNOWN:
1559 default:
1560 drop_packet(skb);
1561 break;
1562 }
1563 }
1564
1565 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1566 struct tcphdr *tcph)
1567 {
1568
1569 int ret;
1570 u32 inc_sequence;
1571 int optionsize;
1572
1573 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1574 skb_trim(skb, 0);
1575 inc_sequence = ntohl(tcph->seq);
1576 switch (cm_node->state) {
1577 case NES_CM_STATE_SYN_SENT:
1578 /* active open */
1579 if (check_syn(cm_node, tcph, skb))
1580 return;
1581 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1582 /* setup options */
1583 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1584 if (ret) {
1585 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1586 cm_node);
1587 break;
1588 }
1589 cleanup_retrans_entry(cm_node);
1590 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1591 send_mpa_request(cm_node, skb);
1592 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1593 break;
1594 case NES_CM_STATE_MPAREQ_RCVD:
1595 /* passive open, so should not be here */
1596 passive_open_err(cm_node, skb, 1);
1597 break;
1598 case NES_CM_STATE_LISTENING:
1599 case NES_CM_STATE_CLOSED:
1600 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1601 cleanup_retrans_entry(cm_node);
1602 send_reset(cm_node, skb);
1603 break;
1604 case NES_CM_STATE_ESTABLISHED:
1605 case NES_CM_STATE_FIN_WAIT1:
1606 case NES_CM_STATE_FIN_WAIT2:
1607 case NES_CM_STATE_LAST_ACK:
1608 case NES_CM_STATE_TSA:
1609 case NES_CM_STATE_CLOSING:
1610 case NES_CM_STATE_UNKNOWN:
1611 case NES_CM_STATE_MPAREQ_SENT:
1612 default:
1613 drop_packet(skb);
1614 break;
1615 }
1616 }
1617
1618 static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1619 struct tcphdr *tcph)
1620 {
1621 int datasize = 0;
1622 u32 inc_sequence;
1623 u32 rem_seq_ack;
1624 u32 rem_seq;
1625 int ret;
1626 int optionsize;
1627 u32 temp_seq = cm_node->tcp_cntxt.loc_seq_num;
1628
1629 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1630 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1631
1632 if (check_seq(cm_node, tcph, skb))
1633 return;
1634
1635 skb_pull(skb, tcph->doff << 2);
1636 inc_sequence = ntohl(tcph->seq);
1637 rem_seq = ntohl(tcph->seq);
1638 rem_seq_ack = ntohl(tcph->ack_seq);
1639 datasize = skb->len;
1640
1641 switch (cm_node->state) {
1642 case NES_CM_STATE_SYN_RCVD:
1643 /* Passive OPEN */
1644 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1645 if (ret)
1646 break;
1647 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1648 cm_node->tcp_cntxt.loc_seq_num = temp_seq;
1649 if (cm_node->tcp_cntxt.rem_ack_num !=
1650 cm_node->tcp_cntxt.loc_seq_num) {
1651 nes_debug(NES_DBG_CM, "rem_ack_num != loc_seq_num\n");
1652 cleanup_retrans_entry(cm_node);
1653 send_reset(cm_node, skb);
1654 return;
1655 }
1656 cm_node->state = NES_CM_STATE_ESTABLISHED;
1657 if (datasize) {
1658 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1659 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1660 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ);
1661 } else { /* rcvd ACK only */
1662 dev_kfree_skb_any(skb);
1663 cleanup_retrans_entry(cm_node);
1664 }
1665 break;
1666 case NES_CM_STATE_ESTABLISHED:
1667 /* Passive OPEN */
1668 /* We expect mpa frame to be received only */
1669 if (datasize) {
1670 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1671 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1672 handle_rcv_mpa(cm_node, skb,
1673 NES_CM_EVENT_MPA_REQ);
1674 } else
1675 drop_packet(skb);
1676 break;
1677 case NES_CM_STATE_MPAREQ_SENT:
1678 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1679 if (datasize) {
1680 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1681 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED);
1682 } else { /* Could be just an ack pkt.. */
1683 cleanup_retrans_entry(cm_node);
1684 dev_kfree_skb_any(skb);
1685 }
1686 break;
1687 case NES_CM_STATE_LISTENING:
1688 case NES_CM_STATE_CLOSED:
1689 cleanup_retrans_entry(cm_node);
1690 send_reset(cm_node, skb);
1691 break;
1692 case NES_CM_STATE_FIN_WAIT1:
1693 case NES_CM_STATE_SYN_SENT:
1694 case NES_CM_STATE_FIN_WAIT2:
1695 case NES_CM_STATE_TSA:
1696 case NES_CM_STATE_MPAREQ_RCVD:
1697 case NES_CM_STATE_LAST_ACK:
1698 case NES_CM_STATE_CLOSING:
1699 case NES_CM_STATE_UNKNOWN:
1700 default:
1701 drop_packet(skb);
1702 break;
1703 }
1704 }
1705
1706
1707
1708 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1709 struct sk_buff *skb, int optionsize, int passive)
1710 {
1711 u8 *optionsloc = (u8 *)&tcph[1];
1712 if (optionsize) {
1713 if (process_options(cm_node, optionsloc, optionsize,
1714 (u32)tcph->syn)) {
1715 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1716 __func__, cm_node);
1717 if (passive)
1718 passive_open_err(cm_node, skb, 1);
1719 else
1720 active_open_err(cm_node, skb, 1);
1721 return 1;
1722 }
1723 }
1724
1725 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1726 cm_node->tcp_cntxt.snd_wscale;
1727
1728 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1729 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1730 return 0;
1731 }
1732
1733 /*
1734 * active_open_err() will send reset() if flag set..
1735 * It will also send ABORT event.
1736 */
1737
1738 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1739 int reset)
1740 {
1741 cleanup_retrans_entry(cm_node);
1742 if (reset) {
1743 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1744 "state=%d\n", cm_node, cm_node->state);
1745 add_ref_cm_node(cm_node);
1746 send_reset(cm_node, skb);
1747 } else
1748 dev_kfree_skb_any(skb);
1749
1750 cm_node->state = NES_CM_STATE_CLOSED;
1751 create_event(cm_node, NES_CM_EVENT_ABORTED);
1752 }
1753
1754 /*
1755 * passive_open_err() will either do a reset() or will free up the skb and
1756 * remove the cm_node.
1757 */
1758
1759 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1760 int reset)
1761 {
1762 cleanup_retrans_entry(cm_node);
1763 cm_node->state = NES_CM_STATE_CLOSED;
1764 if (reset) {
1765 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1766 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1767 send_reset(cm_node, skb);
1768 } else {
1769 dev_kfree_skb_any(skb);
1770 rem_ref_cm_node(cm_node->cm_core, cm_node);
1771 }
1772 }
1773
1774 /*
1775 * free_retrans_entry() routines assumes that the retrans_list_lock has
1776 * been acquired before calling.
1777 */
1778 static void free_retrans_entry(struct nes_cm_node *cm_node)
1779 {
1780 struct nes_timer_entry *send_entry;
1781 send_entry = cm_node->send_entry;
1782 if (send_entry) {
1783 cm_node->send_entry = NULL;
1784 dev_kfree_skb_any(send_entry->skb);
1785 kfree(send_entry);
1786 rem_ref_cm_node(cm_node->cm_core, cm_node);
1787 }
1788 }
1789
1790 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1791 {
1792 unsigned long flags;
1793
1794 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1795 free_retrans_entry(cm_node);
1796 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1797 }
1798
1799 /**
1800 * process_packet
1801 * Returns skb if to be freed, else it will return NULL if already used..
1802 */
1803 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1804 struct nes_cm_core *cm_core)
1805 {
1806 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1807 struct tcphdr *tcph = tcp_hdr(skb);
1808 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1809
1810 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1811 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1812 tcph->ack, tcph->rst, tcph->fin);
1813
1814 if (tcph->rst)
1815 pkt_type = NES_PKT_TYPE_RST;
1816 else if (tcph->syn) {
1817 pkt_type = NES_PKT_TYPE_SYN;
1818 if (tcph->ack)
1819 pkt_type = NES_PKT_TYPE_SYNACK;
1820 } else if (tcph->fin)
1821 pkt_type = NES_PKT_TYPE_FIN;
1822 else if (tcph->ack)
1823 pkt_type = NES_PKT_TYPE_ACK;
1824
1825 switch (pkt_type) {
1826 case NES_PKT_TYPE_SYN:
1827 handle_syn_pkt(cm_node, skb, tcph);
1828 break;
1829 case NES_PKT_TYPE_SYNACK:
1830 handle_synack_pkt(cm_node, skb, tcph);
1831 break;
1832 case NES_PKT_TYPE_ACK:
1833 handle_ack_pkt(cm_node, skb, tcph);
1834 break;
1835 case NES_PKT_TYPE_RST:
1836 handle_rst_pkt(cm_node, skb, tcph);
1837 break;
1838 case NES_PKT_TYPE_FIN:
1839 handle_fin_pkt(cm_node, skb, tcph);
1840 break;
1841 default:
1842 drop_packet(skb);
1843 break;
1844 }
1845 }
1846
1847 /**
1848 * mini_cm_listen - create a listen node with params
1849 */
1850 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1851 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1852 {
1853 struct nes_cm_listener *listener;
1854 unsigned long flags;
1855
1856 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1857 cm_info->loc_addr, cm_info->loc_port);
1858
1859 /* cannot have multiple matching listeners */
1860 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1861 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1862 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1863 /* find automatically incs ref count ??? */
1864 atomic_dec(&listener->ref_count);
1865 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1866 return NULL;
1867 }
1868
1869 if (!listener) {
1870 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1871 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1872 if (!listener) {
1873 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1874 return NULL;
1875 }
1876
1877 listener->loc_addr = htonl(cm_info->loc_addr);
1878 listener->loc_port = htons(cm_info->loc_port);
1879 listener->reused_node = 0;
1880
1881 atomic_set(&listener->ref_count, 1);
1882 }
1883 /* pasive case */
1884 /* find already inc'ed the ref count */
1885 else {
1886 listener->reused_node = 1;
1887 }
1888
1889 listener->cm_id = cm_info->cm_id;
1890 atomic_set(&listener->pend_accepts_cnt, 0);
1891 listener->cm_core = cm_core;
1892 listener->nesvnic = nesvnic;
1893 atomic_inc(&cm_core->node_cnt);
1894
1895 listener->conn_type = cm_info->conn_type;
1896 listener->backlog = cm_info->backlog;
1897 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1898
1899 if (!listener->reused_node) {
1900 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1901 list_add(&listener->list, &cm_core->listen_list.list);
1902 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1903 atomic_inc(&cm_core->listen_node_cnt);
1904 }
1905
1906 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1907 " listener = %p, backlog = %d, cm_id = %p.\n",
1908 cm_info->loc_addr, cm_info->loc_port,
1909 listener, listener->backlog, listener->cm_id);
1910
1911 return listener;
1912 }
1913
1914
1915 /**
1916 * mini_cm_connect - make a connection node with params
1917 */
1918 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1919 struct nes_vnic *nesvnic, u16 private_data_len,
1920 void *private_data, struct nes_cm_info *cm_info)
1921 {
1922 int ret = 0;
1923 struct nes_cm_node *cm_node;
1924 struct nes_cm_listener *loopbackremotelistener;
1925 struct nes_cm_node *loopbackremotenode;
1926 struct nes_cm_info loopback_cm_info;
1927 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
1928 struct ietf_mpa_frame *mpa_frame = NULL;
1929
1930 /* create a CM connection node */
1931 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1932 if (!cm_node)
1933 return NULL;
1934 mpa_frame = &cm_node->mpa_frame;
1935 strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ);
1936 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
1937 mpa_frame->rev = IETF_MPA_VERSION;
1938 mpa_frame->priv_data_len = htons(private_data_len);
1939
1940 /* set our node side to client (active) side */
1941 cm_node->tcp_cntxt.client = 1;
1942 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1943
1944 if (cm_info->loc_addr == cm_info->rem_addr) {
1945 loopbackremotelistener = find_listener(cm_core,
1946 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
1947 NES_CM_LISTENER_ACTIVE_STATE);
1948 if (loopbackremotelistener == NULL) {
1949 create_event(cm_node, NES_CM_EVENT_ABORTED);
1950 } else {
1951 atomic_inc(&cm_loopbacks);
1952 loopback_cm_info = *cm_info;
1953 loopback_cm_info.loc_port = cm_info->rem_port;
1954 loopback_cm_info.rem_port = cm_info->loc_port;
1955 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
1956 loopbackremotenode = make_cm_node(cm_core, nesvnic,
1957 &loopback_cm_info, loopbackremotelistener);
1958 loopbackremotenode->loopbackpartner = cm_node;
1959 loopbackremotenode->tcp_cntxt.rcv_wscale =
1960 NES_CM_DEFAULT_RCV_WND_SCALE;
1961 cm_node->loopbackpartner = loopbackremotenode;
1962 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
1963 private_data_len);
1964 loopbackremotenode->mpa_frame_size = private_data_len;
1965
1966 /* we are done handling this state. */
1967 /* set node to a TSA state */
1968 cm_node->state = NES_CM_STATE_TSA;
1969 cm_node->tcp_cntxt.rcv_nxt =
1970 loopbackremotenode->tcp_cntxt.loc_seq_num;
1971 loopbackremotenode->tcp_cntxt.rcv_nxt =
1972 cm_node->tcp_cntxt.loc_seq_num;
1973 cm_node->tcp_cntxt.max_snd_wnd =
1974 loopbackremotenode->tcp_cntxt.rcv_wnd;
1975 loopbackremotenode->tcp_cntxt.max_snd_wnd =
1976 cm_node->tcp_cntxt.rcv_wnd;
1977 cm_node->tcp_cntxt.snd_wnd =
1978 loopbackremotenode->tcp_cntxt.rcv_wnd;
1979 loopbackremotenode->tcp_cntxt.snd_wnd =
1980 cm_node->tcp_cntxt.rcv_wnd;
1981 cm_node->tcp_cntxt.snd_wscale =
1982 loopbackremotenode->tcp_cntxt.rcv_wscale;
1983 loopbackremotenode->tcp_cntxt.snd_wscale =
1984 cm_node->tcp_cntxt.rcv_wscale;
1985
1986 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1987 }
1988 return cm_node;
1989 }
1990
1991 /* set our node side to client (active) side */
1992 cm_node->tcp_cntxt.client = 1;
1993 /* init our MPA frame ptr */
1994 memcpy(mpa_frame->priv_data, private_data, private_data_len);
1995
1996 cm_node->mpa_frame_size = mpa_frame_size;
1997
1998 /* send a syn and goto syn sent state */
1999 cm_node->state = NES_CM_STATE_SYN_SENT;
2000 ret = send_syn(cm_node, 0, NULL);
2001
2002 if (ret) {
2003 /* error in sending the syn free up the cm_node struct */
2004 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2005 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2006 cm_node->rem_addr, cm_node->rem_port, cm_node,
2007 cm_node->cm_id);
2008 rem_ref_cm_node(cm_node->cm_core, cm_node);
2009 cm_node = NULL;
2010 }
2011
2012 if (cm_node)
2013 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2014 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2015 cm_node->rem_addr, cm_node->rem_port, cm_node,
2016 cm_node->cm_id);
2017
2018 return cm_node;
2019 }
2020
2021
2022 /**
2023 * mini_cm_accept - accept a connection
2024 * This function is never called
2025 */
2026 static int mini_cm_accept(struct nes_cm_core *cm_core,
2027 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2028 {
2029 return 0;
2030 }
2031
2032
2033 /**
2034 * mini_cm_reject - reject and teardown a connection
2035 */
2036 static int mini_cm_reject(struct nes_cm_core *cm_core,
2037 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2038 {
2039 int ret = 0;
2040 int passive_state;
2041
2042 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2043 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2044
2045 if (cm_node->tcp_cntxt.client)
2046 return ret;
2047 cleanup_retrans_entry(cm_node);
2048
2049 passive_state = atomic_add_return(1, &cm_node->passive_state);
2050 cm_node->state = NES_CM_STATE_CLOSED;
2051 if (passive_state == NES_SEND_RESET_EVENT)
2052 rem_ref_cm_node(cm_core, cm_node);
2053 else
2054 ret = send_reset(cm_node, NULL);
2055 return ret;
2056 }
2057
2058
2059 /**
2060 * mini_cm_close
2061 */
2062 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2063 {
2064 int ret = 0;
2065
2066 if (!cm_core || !cm_node)
2067 return -EINVAL;
2068
2069 switch (cm_node->state) {
2070 case NES_CM_STATE_SYN_RCVD:
2071 case NES_CM_STATE_SYN_SENT:
2072 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2073 case NES_CM_STATE_ESTABLISHED:
2074 case NES_CM_STATE_ACCEPTING:
2075 case NES_CM_STATE_MPAREQ_SENT:
2076 case NES_CM_STATE_MPAREQ_RCVD:
2077 cleanup_retrans_entry(cm_node);
2078 send_reset(cm_node, NULL);
2079 break;
2080 case NES_CM_STATE_CLOSE_WAIT:
2081 cm_node->state = NES_CM_STATE_LAST_ACK;
2082 send_fin(cm_node, NULL);
2083 break;
2084 case NES_CM_STATE_FIN_WAIT1:
2085 case NES_CM_STATE_FIN_WAIT2:
2086 case NES_CM_STATE_LAST_ACK:
2087 case NES_CM_STATE_TIME_WAIT:
2088 case NES_CM_STATE_CLOSING:
2089 ret = -1;
2090 break;
2091 case NES_CM_STATE_LISTENING:
2092 case NES_CM_STATE_UNKNOWN:
2093 case NES_CM_STATE_INITED:
2094 case NES_CM_STATE_CLOSED:
2095 ret = rem_ref_cm_node(cm_core, cm_node);
2096 break;
2097 case NES_CM_STATE_TSA:
2098 if (cm_node->send_entry)
2099 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2100 "send_entry=%p\n", cm_node->send_entry);
2101 ret = rem_ref_cm_node(cm_core, cm_node);
2102 break;
2103 }
2104 return ret;
2105 }
2106
2107
2108 /**
2109 * recv_pkt - recv an ETHERNET packet, and process it through CM
2110 * node state machine
2111 */
2112 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2113 struct nes_vnic *nesvnic, struct sk_buff *skb)
2114 {
2115 struct nes_cm_node *cm_node = NULL;
2116 struct nes_cm_listener *listener = NULL;
2117 struct iphdr *iph;
2118 struct tcphdr *tcph;
2119 struct nes_cm_info nfo;
2120 int skb_handled = 1;
2121
2122 if (!skb)
2123 return 0;
2124 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2125 return 0;
2126 }
2127
2128 iph = (struct iphdr *)skb->data;
2129 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2130
2131 nfo.loc_addr = ntohl(iph->daddr);
2132 nfo.loc_port = ntohs(tcph->dest);
2133 nfo.rem_addr = ntohl(iph->saddr);
2134 nfo.rem_port = ntohs(tcph->source);
2135
2136 nes_debug(NES_DBG_CM, "Received packet: dest=" NIPQUAD_FMT
2137 ":0x%04X src=" NIPQUAD_FMT ":0x%04X\n",
2138 NIPQUAD(iph->daddr), tcph->dest,
2139 NIPQUAD(iph->saddr), tcph->source);
2140
2141 do {
2142 cm_node = find_node(cm_core,
2143 nfo.rem_port, nfo.rem_addr,
2144 nfo.loc_port, nfo.loc_addr);
2145
2146 if (!cm_node) {
2147 /* Only type of packet accepted are for */
2148 /* the PASSIVE open (syn only) */
2149 if ((!tcph->syn) || (tcph->ack)) {
2150 skb_handled = 0;
2151 break;
2152 }
2153 listener = find_listener(cm_core, nfo.loc_addr,
2154 nfo.loc_port,
2155 NES_CM_LISTENER_ACTIVE_STATE);
2156 if (!listener) {
2157 nfo.cm_id = NULL;
2158 nfo.conn_type = 0;
2159 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2160 skb_handled = 0;
2161 break;
2162 }
2163 nfo.cm_id = listener->cm_id;
2164 nfo.conn_type = listener->conn_type;
2165 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2166 listener);
2167 if (!cm_node) {
2168 nes_debug(NES_DBG_CM, "Unable to allocate "
2169 "node\n");
2170 cm_packets_dropped++;
2171 atomic_dec(&listener->ref_count);
2172 dev_kfree_skb_any(skb);
2173 break;
2174 }
2175 if (!tcph->rst && !tcph->fin) {
2176 cm_node->state = NES_CM_STATE_LISTENING;
2177 } else {
2178 cm_packets_dropped++;
2179 rem_ref_cm_node(cm_core, cm_node);
2180 dev_kfree_skb_any(skb);
2181 break;
2182 }
2183 add_ref_cm_node(cm_node);
2184 } else if (cm_node->state == NES_CM_STATE_TSA) {
2185 rem_ref_cm_node(cm_core, cm_node);
2186 atomic_inc(&cm_accel_dropped_pkts);
2187 dev_kfree_skb_any(skb);
2188 break;
2189 }
2190 skb_reset_network_header(skb);
2191 skb_set_transport_header(skb, sizeof(*tcph));
2192 skb->len = ntohs(iph->tot_len);
2193 process_packet(cm_node, skb, cm_core);
2194 rem_ref_cm_node(cm_core, cm_node);
2195 } while (0);
2196 return skb_handled;
2197 }
2198
2199
2200 /**
2201 * nes_cm_alloc_core - allocate a top level instance of a cm core
2202 */
2203 static struct nes_cm_core *nes_cm_alloc_core(void)
2204 {
2205 int i;
2206
2207 struct nes_cm_core *cm_core;
2208 struct sk_buff *skb = NULL;
2209
2210 /* setup the CM core */
2211 /* alloc top level core control structure */
2212 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2213 if (!cm_core)
2214 return NULL;
2215
2216 INIT_LIST_HEAD(&cm_core->connected_nodes);
2217 init_timer(&cm_core->tcp_timer);
2218 cm_core->tcp_timer.function = nes_cm_timer_tick;
2219
2220 cm_core->mtu = NES_CM_DEFAULT_MTU;
2221 cm_core->state = NES_CM_STATE_INITED;
2222 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2223
2224 atomic_set(&cm_core->events_posted, 0);
2225
2226 /* init the packet lists */
2227 skb_queue_head_init(&cm_core->tx_free_list);
2228
2229 for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) {
2230 skb = dev_alloc_skb(cm_core->mtu);
2231 if (!skb) {
2232 kfree(cm_core);
2233 return NULL;
2234 }
2235 /* add 'raw' skb to free frame list */
2236 skb_queue_head(&cm_core->tx_free_list, skb);
2237 }
2238
2239 cm_core->api = &nes_cm_api;
2240
2241 spin_lock_init(&cm_core->ht_lock);
2242 spin_lock_init(&cm_core->listen_list_lock);
2243
2244 INIT_LIST_HEAD(&cm_core->listen_list.list);
2245
2246 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2247
2248 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2249 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2250 cm_core->post_event = nes_cm_post_event;
2251 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2252 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2253
2254 print_core(cm_core);
2255 return cm_core;
2256 }
2257
2258
2259 /**
2260 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2261 */
2262 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2263 {
2264 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2265
2266 if (!cm_core)
2267 return -EINVAL;
2268
2269 barrier();
2270
2271 if (timer_pending(&cm_core->tcp_timer)) {
2272 del_timer(&cm_core->tcp_timer);
2273 }
2274
2275 destroy_workqueue(cm_core->event_wq);
2276 destroy_workqueue(cm_core->disconn_wq);
2277 nes_debug(NES_DBG_CM, "\n");
2278 kfree(cm_core);
2279
2280 return 0;
2281 }
2282
2283
2284 /**
2285 * mini_cm_get
2286 */
2287 static int mini_cm_get(struct nes_cm_core *cm_core)
2288 {
2289 return cm_core->state;
2290 }
2291
2292
2293 /**
2294 * mini_cm_set
2295 */
2296 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2297 {
2298 int ret = 0;
2299
2300 switch (type) {
2301 case NES_CM_SET_PKT_SIZE:
2302 cm_core->mtu = value;
2303 break;
2304 case NES_CM_SET_FREE_PKT_Q_SIZE:
2305 cm_core->free_tx_pkt_max = value;
2306 break;
2307 default:
2308 /* unknown set option */
2309 ret = -EINVAL;
2310 }
2311
2312 return ret;
2313 }
2314
2315
2316 /**
2317 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2318 * successfully exchanged when this is called
2319 */
2320 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2321 {
2322 int ret = 0;
2323
2324 if (!nesqp)
2325 return -EINVAL;
2326
2327 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2328 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2329 NES_QPCONTEXT_MISC_DROS);
2330
2331 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2332 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2333
2334 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2335
2336 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2337
2338 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2339 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2340
2341 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2342 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2343 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2344
2345 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2346 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2347 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2348
2349 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2350 nesqp->nesqp_context->ts_recent = 0;
2351 nesqp->nesqp_context->ts_age = 0;
2352 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2353 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2354 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2355 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2356 cm_node->tcp_cntxt.rcv_wscale);
2357 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2358 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2359 nesqp->nesqp_context->srtt = 0;
2360 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2361 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2362 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2363 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2364 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2365 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2366
2367 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2368 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2369 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2370 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2371 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2372 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2373 le32_to_cpu(nesqp->nesqp_context->misc));
2374 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2375 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2376 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2377
2378 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2379 cm_node->state = NES_CM_STATE_TSA;
2380
2381 return ret;
2382 }
2383
2384
2385 /**
2386 * nes_cm_disconn
2387 */
2388 int nes_cm_disconn(struct nes_qp *nesqp)
2389 {
2390 unsigned long flags;
2391
2392 spin_lock_irqsave(&nesqp->lock, flags);
2393 if (nesqp->disconn_pending == 0) {
2394 nesqp->disconn_pending++;
2395 spin_unlock_irqrestore(&nesqp->lock, flags);
2396 /* init our disconnect work element, to */
2397 INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
2398
2399 queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
2400 } else
2401 spin_unlock_irqrestore(&nesqp->lock, flags);
2402
2403 return 0;
2404 }
2405
2406
2407 /**
2408 * nes_disconnect_worker
2409 */
2410 static void nes_disconnect_worker(struct work_struct *work)
2411 {
2412 struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
2413
2414 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2415 nesqp->last_aeq, nesqp->hwqp.qp_id);
2416 nes_cm_disconn_true(nesqp);
2417 }
2418
2419
2420 /**
2421 * nes_cm_disconn_true
2422 */
2423 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2424 {
2425 unsigned long flags;
2426 int ret = 0;
2427 struct iw_cm_id *cm_id;
2428 struct iw_cm_event cm_event;
2429 struct nes_vnic *nesvnic;
2430 u16 last_ae;
2431 u8 original_hw_tcp_state;
2432 u8 original_ibqp_state;
2433 u8 issued_disconnect_reset = 0;
2434
2435 if (!nesqp) {
2436 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2437 return -1;
2438 }
2439
2440 spin_lock_irqsave(&nesqp->lock, flags);
2441 cm_id = nesqp->cm_id;
2442 /* make sure we havent already closed this connection */
2443 if (!cm_id) {
2444 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2445 nesqp->hwqp.qp_id);
2446 spin_unlock_irqrestore(&nesqp->lock, flags);
2447 return -1;
2448 }
2449
2450 nesvnic = to_nesvnic(nesqp->ibqp.device);
2451 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2452
2453 original_hw_tcp_state = nesqp->hw_tcp_state;
2454 original_ibqp_state = nesqp->ibqp_state;
2455 last_ae = nesqp->last_aeq;
2456
2457
2458 nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
2459
2460 if ((nesqp->cm_id) && (cm_id->event_handler)) {
2461 if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2462 ((original_ibqp_state == IB_QPS_RTS) &&
2463 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2464 atomic_inc(&cm_disconnects);
2465 cm_event.event = IW_CM_EVENT_DISCONNECT;
2466 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
2467 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2468 nes_debug(NES_DBG_CM, "Generating a CM "
2469 "Disconnect Event (status reset) for "
2470 "QP%u, cm_id = %p. \n",
2471 nesqp->hwqp.qp_id, cm_id);
2472 } else
2473 cm_event.status = IW_CM_EVENT_STATUS_OK;
2474
2475 cm_event.local_addr = cm_id->local_addr;
2476 cm_event.remote_addr = cm_id->remote_addr;
2477 cm_event.private_data = NULL;
2478 cm_event.private_data_len = 0;
2479
2480 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2481 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2482 "cm_id = %p, refcount = %u.\n",
2483 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2484 nesqp->hwqp.sq_tail, cm_id,
2485 atomic_read(&nesqp->refcount));
2486
2487 spin_unlock_irqrestore(&nesqp->lock, flags);
2488 ret = cm_id->event_handler(cm_id, &cm_event);
2489 if (ret)
2490 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2491 "returned, ret=%d\n", ret);
2492 spin_lock_irqsave(&nesqp->lock, flags);
2493 }
2494
2495 nesqp->disconn_pending = 0;
2496 /* There might have been another AE while the lock was released */
2497 original_hw_tcp_state = nesqp->hw_tcp_state;
2498 original_ibqp_state = nesqp->ibqp_state;
2499 last_ae = nesqp->last_aeq;
2500
2501 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2502 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2503 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2504 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2505 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2506 atomic_inc(&cm_closes);
2507 nesqp->cm_id = NULL;
2508 nesqp->in_disconnect = 0;
2509 spin_unlock_irqrestore(&nesqp->lock, flags);
2510 nes_disconnect(nesqp, 1);
2511
2512 cm_id->provider_data = nesqp;
2513 /* Send up the close complete event */
2514 cm_event.event = IW_CM_EVENT_CLOSE;
2515 cm_event.status = IW_CM_EVENT_STATUS_OK;
2516 cm_event.provider_data = cm_id->provider_data;
2517 cm_event.local_addr = cm_id->local_addr;
2518 cm_event.remote_addr = cm_id->remote_addr;
2519 cm_event.private_data = NULL;
2520 cm_event.private_data_len = 0;
2521
2522 ret = cm_id->event_handler(cm_id, &cm_event);
2523 if (ret) {
2524 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2525 }
2526
2527 cm_id->rem_ref(cm_id);
2528
2529 spin_lock_irqsave(&nesqp->lock, flags);
2530 if (nesqp->flush_issued == 0) {
2531 nesqp->flush_issued = 1;
2532 spin_unlock_irqrestore(&nesqp->lock, flags);
2533 flush_wqes(nesvnic->nesdev, nesqp,
2534 NES_CQP_FLUSH_RQ, 1);
2535 } else
2536 spin_unlock_irqrestore(&nesqp->lock, flags);
2537 } else {
2538 cm_id = nesqp->cm_id;
2539 spin_unlock_irqrestore(&nesqp->lock, flags);
2540 /* check to see if the inbound reset beat the outbound reset */
2541 if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
2542 nes_debug(NES_DBG_CM, "QP%u: Decing refcount "
2543 "due to inbound reset beating the "
2544 "outbound reset.\n", nesqp->hwqp.qp_id);
2545 }
2546 }
2547 } else {
2548 nesqp->disconn_pending = 0;
2549 spin_unlock_irqrestore(&nesqp->lock, flags);
2550 }
2551
2552 return 0;
2553 }
2554
2555
2556 /**
2557 * nes_disconnect
2558 */
2559 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2560 {
2561 int ret = 0;
2562 struct nes_vnic *nesvnic;
2563 struct nes_device *nesdev;
2564
2565 nesvnic = to_nesvnic(nesqp->ibqp.device);
2566 if (!nesvnic)
2567 return -EINVAL;
2568
2569 nesdev = nesvnic->nesdev;
2570
2571 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2572 atomic_read(&nesvnic->netdev->refcnt));
2573
2574 if (nesqp->active_conn) {
2575
2576 /* indicate this connection is NOT active */
2577 nesqp->active_conn = 0;
2578 } else {
2579 /* Need to free the Last Streaming Mode Message */
2580 if (nesqp->ietf_frame) {
2581 pci_free_consistent(nesdev->pcidev,
2582 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2583 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2584 }
2585 }
2586
2587 /* close the CM node down if it is still active */
2588 if (nesqp->cm_node) {
2589 nes_debug(NES_DBG_CM, "Call close API\n");
2590
2591 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2592 }
2593
2594 return ret;
2595 }
2596
2597
2598 /**
2599 * nes_accept
2600 */
2601 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2602 {
2603 u64 u64temp;
2604 struct ib_qp *ibqp;
2605 struct nes_qp *nesqp;
2606 struct nes_vnic *nesvnic;
2607 struct nes_device *nesdev;
2608 struct nes_cm_node *cm_node;
2609 struct nes_adapter *adapter;
2610 struct ib_qp_attr attr;
2611 struct iw_cm_event cm_event;
2612 struct nes_hw_qp_wqe *wqe;
2613 struct nes_v4_quad nes_quad;
2614 u32 crc_value;
2615 int ret;
2616 int passive_state;
2617
2618 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2619 if (!ibqp)
2620 return -EINVAL;
2621
2622 /* get all our handles */
2623 nesqp = to_nesqp(ibqp);
2624 nesvnic = to_nesvnic(nesqp->ibqp.device);
2625 nesdev = nesvnic->nesdev;
2626 adapter = nesdev->nesadapter;
2627
2628 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2629 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2630 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2631 nesvnic->netdev->name);
2632
2633 /* associate the node with the QP */
2634 nesqp->cm_node = (void *)cm_node;
2635 cm_node->nesqp = nesqp;
2636 nes_add_ref(&nesqp->ibqp);
2637
2638 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2639 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2640 atomic_inc(&cm_accepts);
2641
2642 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2643 atomic_read(&nesvnic->netdev->refcnt));
2644
2645 /* allocate the ietf frame and space for private data */
2646 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2647 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2648 &nesqp->ietf_frame_pbase);
2649
2650 if (!nesqp->ietf_frame) {
2651 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2652 "data\n");
2653 return -ENOMEM;
2654 }
2655
2656
2657 /* setup the MPA frame */
2658 nesqp->private_data_len = conn_param->private_data_len;
2659 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2660
2661 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2662 conn_param->private_data_len);
2663
2664 nesqp->ietf_frame->priv_data_len =
2665 cpu_to_be16(conn_param->private_data_len);
2666 nesqp->ietf_frame->rev = mpa_version;
2667 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2668
2669 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2670 wqe = &nesqp->hwqp.sq_vbase[0];
2671
2672 if (cm_id->remote_addr.sin_addr.s_addr !=
2673 cm_id->local_addr.sin_addr.s_addr) {
2674 u64temp = (unsigned long)nesqp;
2675 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2676 set_wqe_64bit_value(wqe->wqe_words,
2677 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2678 u64temp);
2679 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2680 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2681 NES_IWARP_SQ_WQE_WRPDU);
2682 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2683 cpu_to_le32(conn_param->private_data_len +
2684 sizeof(struct ietf_mpa_frame));
2685 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
2686 cpu_to_le32((u32)nesqp->ietf_frame_pbase);
2687 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
2688 cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
2689 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2690 cpu_to_le32(conn_param->private_data_len +
2691 sizeof(struct ietf_mpa_frame));
2692 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2693
2694 nesqp->nesqp_context->ird_ord_sizes |=
2695 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2696 NES_QPCONTEXT_ORDIRD_WRPDU);
2697 } else {
2698 nesqp->nesqp_context->ird_ord_sizes |=
2699 cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2700 NES_QPCONTEXT_ORDIRD_WRPDU |
2701 NES_QPCONTEXT_ORDIRD_ALSMM));
2702 }
2703 nesqp->skip_lsmm = 1;
2704
2705
2706 /* Cache the cm_id in the qp */
2707 nesqp->cm_id = cm_id;
2708 cm_node->cm_id = cm_id;
2709
2710 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2711 cm_id->provider_data = nesqp;
2712 nesqp->active_conn = 0;
2713
2714 if (cm_node->state == NES_CM_STATE_TSA)
2715 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2716 cm_node);
2717
2718 nes_cm_init_tsa_conn(nesqp, cm_node);
2719
2720 nesqp->nesqp_context->tcpPorts[0] =
2721 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2722 nesqp->nesqp_context->tcpPorts[1] =
2723 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2724
2725 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2726 nesqp->nesqp_context->ip0 =
2727 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2728 else
2729 nesqp->nesqp_context->ip0 =
2730 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2731
2732 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2733 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2734 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2735
2736 nesqp->nesqp_context->arp_index_vlan |=
2737 cpu_to_le32(nes_arp_table(nesdev,
2738 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2739 NES_ARP_RESOLVE) << 16);
2740
2741 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2742 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2743
2744 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2745
2746 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2747 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2748 nesqp->nesqp_context->ird_ord_sizes |=
2749 cpu_to_le32((u32)conn_param->ord);
2750
2751 memset(&nes_quad, 0, sizeof(nes_quad));
2752 nes_quad.DstIpAdrIndex =
2753 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2754 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2755 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2756 else
2757 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2758 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2759 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2760
2761 /* Produce hash key */
2762 crc_value = get_crc_value(&nes_quad);
2763 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2764 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2765 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2766
2767 nesqp->hte_index &= adapter->hte_index_mask;
2768 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2769
2770 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2771
2772 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2773 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2774 "private data length=%zu.\n", nesqp->hwqp.qp_id,
2775 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2776 ntohs(cm_id->remote_addr.sin_port),
2777 ntohl(cm_id->local_addr.sin_addr.s_addr),
2778 ntohs(cm_id->local_addr.sin_port),
2779 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2780 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2781 conn_param->private_data_len +
2782 sizeof(struct ietf_mpa_frame));
2783
2784
2785 /* notify OF layer that accept event was successfull */
2786 cm_id->add_ref(cm_id);
2787
2788 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2789 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2790 cm_event.provider_data = (void *)nesqp;
2791 cm_event.local_addr = cm_id->local_addr;
2792 cm_event.remote_addr = cm_id->remote_addr;
2793 cm_event.private_data = NULL;
2794 cm_event.private_data_len = 0;
2795 ret = cm_id->event_handler(cm_id, &cm_event);
2796 attr.qp_state = IB_QPS_RTS;
2797 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2798 if (cm_node->loopbackpartner) {
2799 cm_node->loopbackpartner->mpa_frame_size =
2800 nesqp->private_data_len;
2801 /* copy entire MPA frame to our cm_node's frame */
2802 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2803 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2804 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2805 }
2806 if (ret)
2807 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2808 "ret=%d\n", __func__, __LINE__, ret);
2809
2810 passive_state = atomic_add_return(1, &cm_node->passive_state);
2811 if (passive_state == NES_SEND_RESET_EVENT)
2812 create_event(cm_node, NES_CM_EVENT_RESET);
2813 return 0;
2814 }
2815
2816
2817 /**
2818 * nes_reject
2819 */
2820 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2821 {
2822 struct nes_cm_node *cm_node;
2823 struct nes_cm_core *cm_core;
2824
2825 atomic_inc(&cm_rejects);
2826 cm_node = (struct nes_cm_node *) cm_id->provider_data;
2827 cm_core = cm_node->cm_core;
2828 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2829
2830 strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
2831 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2832
2833 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2834 cm_node->mpa_frame.rev = mpa_version;
2835 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2836
2837 cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2838
2839 return 0;
2840 }
2841
2842
2843 /**
2844 * nes_connect
2845 * setup and launch cm connect node
2846 */
2847 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2848 {
2849 struct ib_qp *ibqp;
2850 struct nes_qp *nesqp;
2851 struct nes_vnic *nesvnic;
2852 struct nes_device *nesdev;
2853 struct nes_cm_node *cm_node;
2854 struct nes_cm_info cm_info;
2855
2856 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2857 if (!ibqp)
2858 return -EINVAL;
2859 nesqp = to_nesqp(ibqp);
2860 if (!nesqp)
2861 return -EINVAL;
2862 nesvnic = to_nesvnic(nesqp->ibqp.device);
2863 if (!nesvnic)
2864 return -EINVAL;
2865 nesdev = nesvnic->nesdev;
2866 if (!nesdev)
2867 return -EINVAL;
2868
2869 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
2870 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
2871 ntohl(nesvnic->local_ipaddr),
2872 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2873 ntohs(cm_id->remote_addr.sin_port),
2874 ntohl(cm_id->local_addr.sin_addr.s_addr),
2875 ntohs(cm_id->local_addr.sin_port));
2876
2877 atomic_inc(&cm_connects);
2878 nesqp->active_conn = 1;
2879
2880 /* cache the cm_id in the qp */
2881 nesqp->cm_id = cm_id;
2882
2883 cm_id->provider_data = nesqp;
2884
2885 nesqp->private_data_len = conn_param->private_data_len;
2886 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2887 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
2888 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
2889 conn_param->private_data_len);
2890
2891 if (cm_id->local_addr.sin_addr.s_addr !=
2892 cm_id->remote_addr.sin_addr.s_addr)
2893 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2894 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2895
2896 /* set up the connection params for the node */
2897 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
2898 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
2899 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
2900 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
2901 cm_info.cm_id = cm_id;
2902 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2903
2904 cm_id->add_ref(cm_id);
2905
2906 /* create a connect CM node connection */
2907 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
2908 conn_param->private_data_len, (void *)conn_param->private_data,
2909 &cm_info);
2910 if (!cm_node) {
2911 if (cm_id->local_addr.sin_addr.s_addr !=
2912 cm_id->remote_addr.sin_addr.s_addr)
2913 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2914 PCI_FUNC(nesdev->pcidev->devfn),
2915 NES_MANAGE_APBVT_DEL);
2916
2917 cm_id->rem_ref(cm_id);
2918 return -ENOMEM;
2919 }
2920
2921 cm_node->apbvt_set = 1;
2922 nesqp->cm_node = cm_node;
2923 cm_node->nesqp = nesqp;
2924 nes_add_ref(&nesqp->ibqp);
2925
2926 return 0;
2927 }
2928
2929
2930 /**
2931 * nes_create_listen
2932 */
2933 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
2934 {
2935 struct nes_vnic *nesvnic;
2936 struct nes_cm_listener *cm_node;
2937 struct nes_cm_info cm_info;
2938 struct nes_adapter *adapter;
2939 int err;
2940
2941
2942 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
2943 cm_id, ntohs(cm_id->local_addr.sin_port));
2944
2945 nesvnic = to_nesvnic(cm_id->device);
2946 if (!nesvnic)
2947 return -EINVAL;
2948 adapter = nesvnic->nesdev->nesadapter;
2949 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2950 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2951
2952 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
2953 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
2954
2955 /* setup listen params in our api call struct */
2956 cm_info.loc_addr = nesvnic->local_ipaddr;
2957 cm_info.loc_port = cm_id->local_addr.sin_port;
2958 cm_info.backlog = backlog;
2959 cm_info.cm_id = cm_id;
2960
2961 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2962
2963
2964 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
2965 if (!cm_node) {
2966 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
2967 __func__, __LINE__);
2968 return -ENOMEM;
2969 }
2970
2971 cm_id->provider_data = cm_node;
2972
2973 if (!cm_node->reused_node) {
2974 err = nes_manage_apbvt(nesvnic,
2975 ntohs(cm_id->local_addr.sin_port),
2976 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
2977 NES_MANAGE_APBVT_ADD);
2978 if (err) {
2979 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
2980 err);
2981 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
2982 return err;
2983 }
2984 cm_listens_created++;
2985 }
2986
2987 cm_id->add_ref(cm_id);
2988 cm_id->provider_data = (void *)cm_node;
2989
2990
2991 return 0;
2992 }
2993
2994
2995 /**
2996 * nes_destroy_listen
2997 */
2998 int nes_destroy_listen(struct iw_cm_id *cm_id)
2999 {
3000 if (cm_id->provider_data)
3001 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3002 else
3003 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3004
3005 cm_id->rem_ref(cm_id);
3006
3007 return 0;
3008 }
3009
3010
3011 /**
3012 * nes_cm_recv
3013 */
3014 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3015 {
3016 int rc = 0;
3017 cm_packets_received++;
3018 if ((g_cm_core) && (g_cm_core->api)) {
3019 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3020 } else {
3021 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3022 " cm is not setup properly.\n");
3023 }
3024
3025 return rc;
3026 }
3027
3028
3029 /**
3030 * nes_cm_start
3031 * Start and init a cm core module
3032 */
3033 int nes_cm_start(void)
3034 {
3035 nes_debug(NES_DBG_CM, "\n");
3036 /* create the primary CM core, pass this handle to subsequent core inits */
3037 g_cm_core = nes_cm_alloc_core();
3038 if (g_cm_core) {
3039 return 0;
3040 } else {
3041 return -ENOMEM;
3042 }
3043 }
3044
3045
3046 /**
3047 * nes_cm_stop
3048 * stop and dealloc all cm core instances
3049 */
3050 int nes_cm_stop(void)
3051 {
3052 g_cm_core->api->destroy_cm_core(g_cm_core);
3053 return 0;
3054 }
3055
3056
3057 /**
3058 * cm_event_connected
3059 * handle a connected event, setup QPs and HW
3060 */
3061 static void cm_event_connected(struct nes_cm_event *event)
3062 {
3063 u64 u64temp;
3064 struct nes_qp *nesqp;
3065 struct nes_vnic *nesvnic;
3066 struct nes_device *nesdev;
3067 struct nes_cm_node *cm_node;
3068 struct nes_adapter *nesadapter;
3069 struct ib_qp_attr attr;
3070 struct iw_cm_id *cm_id;
3071 struct iw_cm_event cm_event;
3072 struct nes_hw_qp_wqe *wqe;
3073 struct nes_v4_quad nes_quad;
3074 u32 crc_value;
3075 int ret;
3076
3077 /* get all our handles */
3078 cm_node = event->cm_node;
3079 cm_id = cm_node->cm_id;
3080 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3081 nesqp = (struct nes_qp *)cm_id->provider_data;
3082 nesvnic = to_nesvnic(nesqp->ibqp.device);
3083 nesdev = nesvnic->nesdev;
3084 nesadapter = nesdev->nesadapter;
3085
3086 if (nesqp->destroyed) {
3087 return;
3088 }
3089 atomic_inc(&cm_connecteds);
3090 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3091 " local port 0x%04X. jiffies = %lu.\n",
3092 nesqp->hwqp.qp_id,
3093 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3094 ntohs(cm_id->remote_addr.sin_port),
3095 ntohs(cm_id->local_addr.sin_port),
3096 jiffies);
3097
3098 nes_cm_init_tsa_conn(nesqp, cm_node);
3099
3100 /* set the QP tsa context */
3101 nesqp->nesqp_context->tcpPorts[0] =
3102 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3103 nesqp->nesqp_context->tcpPorts[1] =
3104 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3105 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3106 nesqp->nesqp_context->ip0 =
3107 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3108 else
3109 nesqp->nesqp_context->ip0 =
3110 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3111
3112 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3113 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3114 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3115 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3116 nes_arp_table(nesdev,
3117 le32_to_cpu(nesqp->nesqp_context->ip0),
3118 NULL, NES_ARP_RESOLVE) << 16);
3119 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3120 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3121 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3122 nesqp->nesqp_context->ird_ord_sizes |=
3123 cpu_to_le32((u32)1 <<
3124 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3125
3126 /* Adjust tail for not having a LSMM */
3127 nesqp->hwqp.sq_tail = 1;
3128
3129 #if defined(NES_SEND_FIRST_WRITE)
3130 if (cm_node->send_write0) {
3131 nes_debug(NES_DBG_CM, "Sending first write.\n");
3132 wqe = &nesqp->hwqp.sq_vbase[0];
3133 u64temp = (unsigned long)nesqp;
3134 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3135 set_wqe_64bit_value(wqe->wqe_words,
3136 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3137 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3138 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3139 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3140 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3141 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3142 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3143 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3144
3145 /* use the reserved spot on the WQ for the extra first WQE */
3146 nesqp->nesqp_context->ird_ord_sizes &=
3147 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3148 NES_QPCONTEXT_ORDIRD_WRPDU |
3149 NES_QPCONTEXT_ORDIRD_ALSMM));
3150 nesqp->skip_lsmm = 1;
3151 nesqp->hwqp.sq_tail = 0;
3152 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3153 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3154 }
3155 #endif
3156
3157 memset(&nes_quad, 0, sizeof(nes_quad));
3158
3159 nes_quad.DstIpAdrIndex =
3160 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3161 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3162 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3163 else
3164 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3165 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3166 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3167
3168 /* Produce hash key */
3169 crc_value = get_crc_value(&nes_quad);
3170 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3171 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3172 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3173
3174 nesqp->hte_index &= nesadapter->hte_index_mask;
3175 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3176
3177 nesqp->ietf_frame = &cm_node->mpa_frame;
3178 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3179 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3180
3181 /* notify OF layer we successfully created the requested connection */
3182 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3183 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3184 cm_event.provider_data = cm_id->provider_data;
3185 cm_event.local_addr.sin_family = AF_INET;
3186 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3187 cm_event.remote_addr = cm_id->remote_addr;
3188
3189 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3190 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3191
3192 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3193 ret = cm_id->event_handler(cm_id, &cm_event);
3194 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3195
3196 if (ret)
3197 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3198 "ret=%d\n", __func__, __LINE__, ret);
3199 attr.qp_state = IB_QPS_RTS;
3200 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3201
3202 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3203 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3204
3205 return;
3206 }
3207
3208
3209 /**
3210 * cm_event_connect_error
3211 */
3212 static void cm_event_connect_error(struct nes_cm_event *event)
3213 {
3214 struct nes_qp *nesqp;
3215 struct iw_cm_id *cm_id;
3216 struct iw_cm_event cm_event;
3217 /* struct nes_cm_info cm_info; */
3218 int ret;
3219
3220 if (!event->cm_node)
3221 return;
3222
3223 cm_id = event->cm_node->cm_id;
3224 if (!cm_id) {
3225 return;
3226 }
3227
3228 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3229 nesqp = cm_id->provider_data;
3230
3231 if (!nesqp) {
3232 return;
3233 }
3234
3235 /* notify OF layer about this connection error event */
3236 /* cm_id->rem_ref(cm_id); */
3237 nesqp->cm_id = NULL;
3238 cm_id->provider_data = NULL;
3239 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3240 cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
3241 cm_event.provider_data = cm_id->provider_data;
3242 cm_event.local_addr = cm_id->local_addr;
3243 cm_event.remote_addr = cm_id->remote_addr;
3244 cm_event.private_data = NULL;
3245 cm_event.private_data_len = 0;
3246
3247 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3248 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3249 cm_event.remote_addr.sin_addr.s_addr);
3250
3251 ret = cm_id->event_handler(cm_id, &cm_event);
3252 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3253 if (ret)
3254 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3255 "ret=%d\n", __func__, __LINE__, ret);
3256 cm_id->rem_ref(cm_id);
3257
3258 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3259 return;
3260 }
3261
3262
3263 /**
3264 * cm_event_reset
3265 */
3266 static void cm_event_reset(struct nes_cm_event *event)
3267 {
3268 struct nes_qp *nesqp;
3269 struct iw_cm_id *cm_id;
3270 struct iw_cm_event cm_event;
3271 /* struct nes_cm_info cm_info; */
3272 int ret;
3273
3274 if (!event->cm_node)
3275 return;
3276
3277 if (!event->cm_node->cm_id)
3278 return;
3279
3280 cm_id = event->cm_node->cm_id;
3281
3282 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3283 nesqp = cm_id->provider_data;
3284
3285 nesqp->cm_id = NULL;
3286 /* cm_id->provider_data = NULL; */
3287 cm_event.event = IW_CM_EVENT_DISCONNECT;
3288 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3289 cm_event.provider_data = cm_id->provider_data;
3290 cm_event.local_addr = cm_id->local_addr;
3291 cm_event.remote_addr = cm_id->remote_addr;
3292 cm_event.private_data = NULL;
3293 cm_event.private_data_len = 0;
3294
3295 ret = cm_id->event_handler(cm_id, &cm_event);
3296 cm_id->add_ref(cm_id);
3297 atomic_inc(&cm_closes);
3298 cm_event.event = IW_CM_EVENT_CLOSE;
3299 cm_event.status = IW_CM_EVENT_STATUS_OK;
3300 cm_event.provider_data = cm_id->provider_data;
3301 cm_event.local_addr = cm_id->local_addr;
3302 cm_event.remote_addr = cm_id->remote_addr;
3303 cm_event.private_data = NULL;
3304 cm_event.private_data_len = 0;
3305 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3306 ret = cm_id->event_handler(cm_id, &cm_event);
3307
3308 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3309
3310
3311 /* notify OF layer about this connection error event */
3312 cm_id->rem_ref(cm_id);
3313
3314 return;
3315 }
3316
3317
3318 /**
3319 * cm_event_mpa_req
3320 */
3321 static void cm_event_mpa_req(struct nes_cm_event *event)
3322 {
3323 struct iw_cm_id *cm_id;
3324 struct iw_cm_event cm_event;
3325 int ret;
3326 struct nes_cm_node *cm_node;
3327
3328 cm_node = event->cm_node;
3329 if (!cm_node)
3330 return;
3331 cm_id = cm_node->cm_id;
3332
3333 atomic_inc(&cm_connect_reqs);
3334 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3335 cm_node, cm_id, jiffies);
3336
3337 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3338 cm_event.status = IW_CM_EVENT_STATUS_OK;
3339 cm_event.provider_data = (void *)cm_node;
3340
3341 cm_event.local_addr.sin_family = AF_INET;
3342 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3343 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3344
3345 cm_event.remote_addr.sin_family = AF_INET;
3346 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3347 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3348
3349 cm_event.private_data = cm_node->mpa_frame_buf;
3350 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3351
3352 ret = cm_id->event_handler(cm_id, &cm_event);
3353 if (ret)
3354 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
3355 __func__, __LINE__, ret);
3356
3357 return;
3358 }
3359
3360
3361 static void nes_cm_event_handler(struct work_struct *);
3362
3363 /**
3364 * nes_cm_post_event
3365 * post an event to the cm event handler
3366 */
3367 static int nes_cm_post_event(struct nes_cm_event *event)
3368 {
3369 atomic_inc(&event->cm_node->cm_core->events_posted);
3370 add_ref_cm_node(event->cm_node);
3371 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3372 INIT_WORK(&event->event_work, nes_cm_event_handler);
3373 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3374 event->cm_node, event);
3375
3376 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3377
3378 nes_debug(NES_DBG_CM, "Exit\n");
3379 return 0;
3380 }
3381
3382
3383 /**
3384 * nes_cm_event_handler
3385 * worker function to handle cm events
3386 * will free instance of nes_cm_event
3387 */
3388 static void nes_cm_event_handler(struct work_struct *work)
3389 {
3390 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3391 event_work);
3392 struct nes_cm_core *cm_core;
3393
3394 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3395 return;
3396
3397 cm_core = event->cm_node->cm_core;
3398 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3399 event, event->type, atomic_read(&cm_core->events_posted));
3400
3401 switch (event->type) {
3402 case NES_CM_EVENT_MPA_REQ:
3403 cm_event_mpa_req(event);
3404 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3405 event->cm_node);
3406 break;
3407 case NES_CM_EVENT_RESET:
3408 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3409 event->cm_node);
3410 cm_event_reset(event);
3411 break;
3412 case NES_CM_EVENT_CONNECTED:
3413 if ((!event->cm_node->cm_id) ||
3414 (event->cm_node->state != NES_CM_STATE_TSA))
3415 break;
3416 cm_event_connected(event);
3417 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3418 break;
3419 case NES_CM_EVENT_ABORTED:
3420 if ((!event->cm_node->cm_id) ||
3421 (event->cm_node->state == NES_CM_STATE_TSA))
3422 break;
3423 cm_event_connect_error(event);
3424 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3425 break;
3426 case NES_CM_EVENT_DROPPED_PKT:
3427 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3428 break;
3429 default:
3430 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3431 break;
3432 }
3433
3434 atomic_dec(&cm_core->events_posted);
3435 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3436 rem_ref_cm_node(cm_core, event->cm_node);
3437 kfree(event);
3438
3439 return;
3440 }
Linux kernel - Deliverables
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