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staging: brcm80211: assure common sources are truly common
[zen-stable.git] / drivers / infiniband / hw / nes / nes_cm.c
blob009ec814d517b69c19a02ca7baa003a126441160
1 /*
2 * Copyright (c) 2006 - 2009 Intel Corporation. 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 <linux/highmem.h>
56 #include <linux/slab.h>
57 #include <net/arp.h>
58 #include <net/neighbour.h>
59 #include <net/route.h>
60 #include <net/ip_fib.h>
61 #include <net/tcp.h>
62
63 #include "nes.h"
64
65 u32 cm_packets_sent;
66 u32 cm_packets_bounced;
67 u32 cm_packets_dropped;
68 u32 cm_packets_retrans;
69 u32 cm_packets_created;
70 u32 cm_packets_received;
71 atomic_t cm_listens_created;
72 atomic_t cm_listens_destroyed;
73 u32 cm_backlog_drops;
74 atomic_t cm_loopbacks;
75 atomic_t cm_nodes_created;
76 atomic_t cm_nodes_destroyed;
77 atomic_t cm_accel_dropped_pkts;
78 atomic_t cm_resets_recvd;
79
80 static inline int mini_cm_accelerated(struct nes_cm_core *,
81 struct nes_cm_node *);
82 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
83 struct nes_vnic *, struct nes_cm_info *);
84 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
85 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
86 struct nes_vnic *, u16, void *, struct nes_cm_info *);
87 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
88 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
89 struct nes_cm_node *);
90 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
91 struct nes_cm_node *);
92 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
93 struct sk_buff *);
94 static int mini_cm_dealloc_core(struct nes_cm_core *);
95 static int mini_cm_get(struct nes_cm_core *);
96 static int mini_cm_set(struct nes_cm_core *, u32, u32);
97
98 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
99 void *, u32, void *, u32, u8);
100 static int add_ref_cm_node(struct nes_cm_node *);
101 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
102
103 static int nes_cm_disconn_true(struct nes_qp *);
104 static int nes_cm_post_event(struct nes_cm_event *event);
105 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
106 static void nes_disconnect_worker(struct work_struct *work);
107
108 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
109 static int send_mpa_reject(struct nes_cm_node *);
110 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
111 static int send_reset(struct nes_cm_node *, struct sk_buff *);
112 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
113 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
114 static void process_packet(struct nes_cm_node *, struct sk_buff *,
115 struct nes_cm_core *);
116
117 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
118 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
119 static void cleanup_retrans_entry(struct nes_cm_node *);
120 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
121 static void free_retrans_entry(struct nes_cm_node *cm_node);
122 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
123 struct sk_buff *skb, int optionsize, int passive);
124
125 /* CM event handler functions */
126 static void cm_event_connected(struct nes_cm_event *);
127 static void cm_event_connect_error(struct nes_cm_event *);
128 static void cm_event_reset(struct nes_cm_event *);
129 static void cm_event_mpa_req(struct nes_cm_event *);
130 static void cm_event_mpa_reject(struct nes_cm_event *);
131 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
132
133 static void print_core(struct nes_cm_core *core);
134
135 /* External CM API Interface */
136 /* instance of function pointers for client API */
137 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
138 static struct nes_cm_ops nes_cm_api = {
139 mini_cm_accelerated,
140 mini_cm_listen,
141 mini_cm_del_listen,
142 mini_cm_connect,
143 mini_cm_close,
144 mini_cm_accept,
145 mini_cm_reject,
146 mini_cm_recv_pkt,
147 mini_cm_dealloc_core,
148 mini_cm_get,
149 mini_cm_set
150 };
151
152 static struct nes_cm_core *g_cm_core;
153
154 atomic_t cm_connects;
155 atomic_t cm_accepts;
156 atomic_t cm_disconnects;
157 atomic_t cm_closes;
158 atomic_t cm_connecteds;
159 atomic_t cm_connect_reqs;
160 atomic_t cm_rejects;
161
162
163 /**
164 * create_event
165 */
166 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
167 enum nes_cm_event_type type)
168 {
169 struct nes_cm_event *event;
170
171 if (!cm_node->cm_id)
172 return NULL;
173
174 /* allocate an empty event */
175 event = kzalloc(sizeof(*event), GFP_ATOMIC);
176
177 if (!event)
178 return NULL;
179
180 event->type = type;
181 event->cm_node = cm_node;
182 event->cm_info.rem_addr = cm_node->rem_addr;
183 event->cm_info.loc_addr = cm_node->loc_addr;
184 event->cm_info.rem_port = cm_node->rem_port;
185 event->cm_info.loc_port = cm_node->loc_port;
186 event->cm_info.cm_id = cm_node->cm_id;
187
188 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
189 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
190 cm_node, event, type, event->cm_info.loc_addr,
191 event->cm_info.loc_port, event->cm_info.rem_addr,
192 event->cm_info.rem_port);
193
194 nes_cm_post_event(event);
195 return event;
196 }
197
198
199 /**
200 * send_mpa_request
201 */
202 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
203 {
204 if (!skb) {
205 nes_debug(NES_DBG_CM, "skb set to NULL\n");
206 return -1;
207 }
208
209 /* send an MPA Request frame */
210 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
211 cm_node->mpa_frame_size, SET_ACK);
212
213 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
214 }
215
216
217
218 static int send_mpa_reject(struct nes_cm_node *cm_node)
219 {
220 struct sk_buff *skb = NULL;
221
222 skb = dev_alloc_skb(MAX_CM_BUFFER);
223 if (!skb) {
224 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
225 return -ENOMEM;
226 }
227
228 /* send an MPA reject frame */
229 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
230 cm_node->mpa_frame_size, SET_ACK | SET_FIN);
231
232 cm_node->state = NES_CM_STATE_FIN_WAIT1;
233 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
234 }
235
236
237 /**
238 * recv_mpa - process a received TCP pkt, we are expecting an
239 * IETF MPA frame
240 */
241 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
242 u32 len)
243 {
244 struct ietf_mpa_frame *mpa_frame;
245
246 *type = NES_MPA_REQUEST_ACCEPT;
247
248 /* assume req frame is in tcp data payload */
249 if (len < sizeof(struct ietf_mpa_frame)) {
250 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
251 return -EINVAL;
252 }
253
254 mpa_frame = (struct ietf_mpa_frame *)buffer;
255 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
256 /* make sure mpa private data len is less than 512 bytes */
257 if (cm_node->mpa_frame_size > IETF_MAX_PRIV_DATA_LEN) {
258 nes_debug(NES_DBG_CM, "The received Length of Private"
259 " Data field exceeds 512 octets\n");
260 return -EINVAL;
261 }
262 /*
263 * make sure MPA receiver interoperate with the
264 * received MPA version and MPA key information
265 *
266 */
267 if (mpa_frame->rev != mpa_version) {
268 nes_debug(NES_DBG_CM, "The received mpa version"
269 " can not be interoperated\n");
270 return -EINVAL;
271 }
272 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
273 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
274 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
275 return -EINVAL;
276 }
277 } else {
278 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
279 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
280 return -EINVAL;
281 }
282 }
283
284 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
285 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
286 " complete (%x + %x != %x)\n",
287 cm_node->mpa_frame_size,
288 (u32)sizeof(struct ietf_mpa_frame), len);
289 return -EINVAL;
290 }
291 /* make sure it does not exceed the max size */
292 if (len > MAX_CM_BUFFER) {
293 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
294 " (%x + %x != %x)\n",
295 cm_node->mpa_frame_size,
296 (u32)sizeof(struct ietf_mpa_frame), len);
297 return -EINVAL;
298 }
299
300 /* copy entire MPA frame to our cm_node's frame */
301 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
302 cm_node->mpa_frame_size);
303
304 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
305 *type = NES_MPA_REQUEST_REJECT;
306 return 0;
307 }
308
309
310 /**
311 * form_cm_frame - get a free packet and build empty frame Use
312 * node info to build.
313 */
314 static void form_cm_frame(struct sk_buff *skb,
315 struct nes_cm_node *cm_node, void *options, u32 optionsize,
316 void *data, u32 datasize, u8 flags)
317 {
318 struct tcphdr *tcph;
319 struct iphdr *iph;
320 struct ethhdr *ethh;
321 u8 *buf;
322 u16 packetsize = sizeof(*iph);
323
324 packetsize += sizeof(*tcph);
325 packetsize += optionsize + datasize;
326
327 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
328
329 skb->len = 0;
330 buf = skb_put(skb, packetsize + ETH_HLEN);
331
332 ethh = (struct ethhdr *) buf;
333 buf += ETH_HLEN;
334
335 iph = (struct iphdr *)buf;
336 buf += sizeof(*iph);
337 tcph = (struct tcphdr *)buf;
338 skb_reset_mac_header(skb);
339 skb_set_network_header(skb, ETH_HLEN);
340 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
341 buf += sizeof(*tcph);
342
343 skb->ip_summed = CHECKSUM_PARTIAL;
344 skb->protocol = htons(0x800);
345 skb->data_len = 0;
346 skb->mac_len = ETH_HLEN;
347
348 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
349 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
350 ethh->h_proto = htons(0x0800);
351
352 iph->version = IPVERSION;
353 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
354 iph->tos = 0;
355 iph->tot_len = htons(packetsize);
356 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
357
358 iph->frag_off = htons(0x4000);
359 iph->ttl = 0x40;
360 iph->protocol = 0x06; /* IPPROTO_TCP */
361
362 iph->saddr = htonl(cm_node->loc_addr);
363 iph->daddr = htonl(cm_node->rem_addr);
364
365 tcph->source = htons(cm_node->loc_port);
366 tcph->dest = htons(cm_node->rem_port);
367 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
368
369 if (flags & SET_ACK) {
370 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
371 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
372 tcph->ack = 1;
373 } else
374 tcph->ack_seq = 0;
375
376 if (flags & SET_SYN) {
377 cm_node->tcp_cntxt.loc_seq_num++;
378 tcph->syn = 1;
379 } else
380 cm_node->tcp_cntxt.loc_seq_num += datasize;
381
382 if (flags & SET_FIN) {
383 cm_node->tcp_cntxt.loc_seq_num++;
384 tcph->fin = 1;
385 }
386
387 if (flags & SET_RST)
388 tcph->rst = 1;
389
390 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
391 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
392 tcph->urg_ptr = 0;
393 if (optionsize)
394 memcpy(buf, options, optionsize);
395 buf += optionsize;
396 if (datasize)
397 memcpy(buf, data, datasize);
398
399 skb_shinfo(skb)->nr_frags = 0;
400 cm_packets_created++;
401
402 }
403
404
405 /**
406 * print_core - dump a cm core
407 */
408 static void print_core(struct nes_cm_core *core)
409 {
410 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
411 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
412 if (!core)
413 return;
414 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
415
416 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
417
418 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
419 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
420
421 nes_debug(NES_DBG_CM, "core : %p \n", core);
422
423 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
424 }
425
426
427 /**
428 * schedule_nes_timer
429 * note - cm_node needs to be protected before calling this. Encase in:
430 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
431 */
432 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
433 enum nes_timer_type type, int send_retrans,
434 int close_when_complete)
435 {
436 unsigned long flags;
437 struct nes_cm_core *cm_core = cm_node->cm_core;
438 struct nes_timer_entry *new_send;
439 int ret = 0;
440 u32 was_timer_set;
441
442 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
443 if (!new_send)
444 return -ENOMEM;
445
446 /* new_send->timetosend = currenttime */
447 new_send->retrycount = NES_DEFAULT_RETRYS;
448 new_send->retranscount = NES_DEFAULT_RETRANS;
449 new_send->skb = skb;
450 new_send->timetosend = jiffies;
451 new_send->type = type;
452 new_send->netdev = cm_node->netdev;
453 new_send->send_retrans = send_retrans;
454 new_send->close_when_complete = close_when_complete;
455
456 if (type == NES_TIMER_TYPE_CLOSE) {
457 new_send->timetosend += (HZ/10);
458 if (cm_node->recv_entry) {
459 kfree(new_send);
460 WARN_ON(1);
461 return -EINVAL;
462 }
463 cm_node->recv_entry = new_send;
464 }
465
466 if (type == NES_TIMER_TYPE_SEND) {
467 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
468 atomic_inc(&new_send->skb->users);
469 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
470 cm_node->send_entry = new_send;
471 add_ref_cm_node(cm_node);
472 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
473 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
474
475 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
476 if (ret != NETDEV_TX_OK) {
477 nes_debug(NES_DBG_CM, "Error sending packet %p "
478 "(jiffies = %lu)\n", new_send, jiffies);
479 new_send->timetosend = jiffies;
480 ret = NETDEV_TX_OK;
481 } else {
482 cm_packets_sent++;
483 if (!send_retrans) {
484 cleanup_retrans_entry(cm_node);
485 if (close_when_complete)
486 rem_ref_cm_node(cm_core, cm_node);
487 return ret;
488 }
489 }
490 }
491
492 was_timer_set = timer_pending(&cm_core->tcp_timer);
493
494 if (!was_timer_set) {
495 cm_core->tcp_timer.expires = new_send->timetosend;
496 add_timer(&cm_core->tcp_timer);
497 }
498
499 return ret;
500 }
501
502 static void nes_retrans_expired(struct nes_cm_node *cm_node)
503 {
504 struct iw_cm_id *cm_id = cm_node->cm_id;
505 enum nes_cm_node_state state = cm_node->state;
506 cm_node->state = NES_CM_STATE_CLOSED;
507 switch (state) {
508 case NES_CM_STATE_SYN_RCVD:
509 case NES_CM_STATE_CLOSING:
510 rem_ref_cm_node(cm_node->cm_core, cm_node);
511 break;
512 case NES_CM_STATE_LAST_ACK:
513 case NES_CM_STATE_FIN_WAIT1:
514 if (cm_node->cm_id)
515 cm_id->rem_ref(cm_id);
516 send_reset(cm_node, NULL);
517 break;
518 default:
519 add_ref_cm_node(cm_node);
520 send_reset(cm_node, NULL);
521 create_event(cm_node, NES_CM_EVENT_ABORTED);
522 }
523 }
524
525 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
526 {
527 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
528 struct iw_cm_id *cm_id = cm_node->cm_id;
529 struct nes_qp *nesqp;
530 unsigned long qplockflags;
531
532 if (!recv_entry)
533 return;
534 nesqp = (struct nes_qp *)recv_entry->skb;
535 if (nesqp) {
536 spin_lock_irqsave(&nesqp->lock, qplockflags);
537 if (nesqp->cm_id) {
538 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
539 "refcount = %d: HIT A "
540 "NES_TIMER_TYPE_CLOSE with something "
541 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
542 atomic_read(&nesqp->refcount));
543 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
544 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
545 nesqp->ibqp_state = IB_QPS_ERR;
546 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
547 nes_cm_disconn(nesqp);
548 } else {
549 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
550 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
551 "refcount = %d: HIT A "
552 "NES_TIMER_TYPE_CLOSE with nothing "
553 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
554 atomic_read(&nesqp->refcount));
555 }
556 } else if (rem_node) {
557 /* TIME_WAIT state */
558 rem_ref_cm_node(cm_node->cm_core, cm_node);
559 }
560 if (cm_node->cm_id)
561 cm_id->rem_ref(cm_id);
562 kfree(recv_entry);
563 cm_node->recv_entry = NULL;
564 }
565
566 /**
567 * nes_cm_timer_tick
568 */
569 static void nes_cm_timer_tick(unsigned long pass)
570 {
571 unsigned long flags;
572 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
573 struct nes_cm_node *cm_node;
574 struct nes_timer_entry *send_entry, *recv_entry;
575 struct list_head *list_core_temp;
576 struct list_head *list_node;
577 struct nes_cm_core *cm_core = g_cm_core;
578 u32 settimer = 0;
579 unsigned long timetosend;
580 int ret = NETDEV_TX_OK;
581
582 struct list_head timer_list;
583 INIT_LIST_HEAD(&timer_list);
584 spin_lock_irqsave(&cm_core->ht_lock, flags);
585
586 list_for_each_safe(list_node, list_core_temp,
587 &cm_core->connected_nodes) {
588 cm_node = container_of(list_node, struct nes_cm_node, list);
589 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
590 add_ref_cm_node(cm_node);
591 list_add(&cm_node->timer_entry, &timer_list);
592 }
593 }
594 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
595
596 list_for_each_safe(list_node, list_core_temp, &timer_list) {
597 cm_node = container_of(list_node, struct nes_cm_node,
598 timer_entry);
599 recv_entry = cm_node->recv_entry;
600
601 if (recv_entry) {
602 if (time_after(recv_entry->timetosend, jiffies)) {
603 if (nexttimeout > recv_entry->timetosend ||
604 !settimer) {
605 nexttimeout = recv_entry->timetosend;
606 settimer = 1;
607 }
608 } else
609 handle_recv_entry(cm_node, 1);
610 }
611
612 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
613 do {
614 send_entry = cm_node->send_entry;
615 if (!send_entry)
616 break;
617 if (time_after(send_entry->timetosend, jiffies)) {
618 if (cm_node->state != NES_CM_STATE_TSA) {
619 if ((nexttimeout >
620 send_entry->timetosend) ||
621 !settimer) {
622 nexttimeout =
623 send_entry->timetosend;
624 settimer = 1;
625 }
626 } else {
627 free_retrans_entry(cm_node);
628 }
629 break;
630 }
631
632 if ((cm_node->state == NES_CM_STATE_TSA) ||
633 (cm_node->state == NES_CM_STATE_CLOSED)) {
634 free_retrans_entry(cm_node);
635 break;
636 }
637
638 if (!send_entry->retranscount ||
639 !send_entry->retrycount) {
640 cm_packets_dropped++;
641 free_retrans_entry(cm_node);
642
643 spin_unlock_irqrestore(
644 &cm_node->retrans_list_lock, flags);
645 nes_retrans_expired(cm_node);
646 cm_node->state = NES_CM_STATE_CLOSED;
647 spin_lock_irqsave(&cm_node->retrans_list_lock,
648 flags);
649 break;
650 }
651 atomic_inc(&send_entry->skb->users);
652 cm_packets_retrans++;
653 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
654 "for node %p, jiffies = %lu, time to send = "
655 "%lu, retranscount = %u, send_entry->seq_num = "
656 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
657 "0x%08X\n", send_entry, cm_node, jiffies,
658 send_entry->timetosend,
659 send_entry->retranscount,
660 send_entry->seq_num,
661 cm_node->tcp_cntxt.rem_ack_num);
662
663 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
664 flags);
665 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
666 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
667 if (ret != NETDEV_TX_OK) {
668 nes_debug(NES_DBG_CM, "rexmit failed for "
669 "node=%p\n", cm_node);
670 cm_packets_bounced++;
671 send_entry->retrycount--;
672 nexttimeout = jiffies + NES_SHORT_TIME;
673 settimer = 1;
674 break;
675 } else {
676 cm_packets_sent++;
677 }
678 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
679 "%u, retry count = %u.\n",
680 send_entry->retranscount,
681 send_entry->retrycount);
682 if (send_entry->send_retrans) {
683 send_entry->retranscount--;
684 timetosend = (NES_RETRY_TIMEOUT <<
685 (NES_DEFAULT_RETRANS - send_entry->retranscount));
686
687 send_entry->timetosend = jiffies +
688 min(timetosend, NES_MAX_TIMEOUT);
689 if (nexttimeout > send_entry->timetosend ||
690 !settimer) {
691 nexttimeout = send_entry->timetosend;
692 settimer = 1;
693 }
694 } else {
695 int close_when_complete;
696 close_when_complete =
697 send_entry->close_when_complete;
698 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
699 cm_node, cm_node->state);
700 free_retrans_entry(cm_node);
701 if (close_when_complete)
702 rem_ref_cm_node(cm_node->cm_core,
703 cm_node);
704 }
705 } while (0);
706
707 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
708 rem_ref_cm_node(cm_node->cm_core, cm_node);
709 }
710
711 if (settimer) {
712 if (!timer_pending(&cm_core->tcp_timer)) {
713 cm_core->tcp_timer.expires = nexttimeout;
714 add_timer(&cm_core->tcp_timer);
715 }
716 }
717 }
718
719
720 /**
721 * send_syn
722 */
723 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
724 struct sk_buff *skb)
725 {
726 int ret;
727 int flags = SET_SYN;
728 char optionsbuffer[sizeof(struct option_mss) +
729 sizeof(struct option_windowscale) + sizeof(struct option_base) +
730 TCP_OPTIONS_PADDING];
731
732 int optionssize = 0;
733 /* Sending MSS option */
734 union all_known_options *options;
735
736 if (!cm_node)
737 return -EINVAL;
738
739 options = (union all_known_options *)&optionsbuffer[optionssize];
740 options->as_mss.optionnum = OPTION_NUMBER_MSS;
741 options->as_mss.length = sizeof(struct option_mss);
742 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
743 optionssize += sizeof(struct option_mss);
744
745 options = (union all_known_options *)&optionsbuffer[optionssize];
746 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
747 options->as_windowscale.length = sizeof(struct option_windowscale);
748 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
749 optionssize += sizeof(struct option_windowscale);
750
751 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
752 options = (union all_known_options *)&optionsbuffer[optionssize];
753 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
754 options->as_base.length = sizeof(struct option_base);
755 optionssize += sizeof(struct option_base);
756 /* we need the size to be a multiple of 4 */
757 options = (union all_known_options *)&optionsbuffer[optionssize];
758 options->as_end = 1;
759 optionssize += 1;
760 options = (union all_known_options *)&optionsbuffer[optionssize];
761 options->as_end = 1;
762 optionssize += 1;
763 }
764
765 options = (union all_known_options *)&optionsbuffer[optionssize];
766 options->as_end = OPTION_NUMBER_END;
767 optionssize += 1;
768
769 if (!skb)
770 skb = dev_alloc_skb(MAX_CM_BUFFER);
771 if (!skb) {
772 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
773 return -1;
774 }
775
776 if (sendack)
777 flags |= SET_ACK;
778
779 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
780 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
781
782 return ret;
783 }
784
785
786 /**
787 * send_reset
788 */
789 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
790 {
791 int ret;
792 int flags = SET_RST | SET_ACK;
793
794 if (!skb)
795 skb = dev_alloc_skb(MAX_CM_BUFFER);
796 if (!skb) {
797 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
798 return -ENOMEM;
799 }
800
801 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
802 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
803
804 return ret;
805 }
806
807
808 /**
809 * send_ack
810 */
811 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
812 {
813 int ret;
814
815 if (!skb)
816 skb = dev_alloc_skb(MAX_CM_BUFFER);
817
818 if (!skb) {
819 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
820 return -1;
821 }
822
823 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
824 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
825
826 return ret;
827 }
828
829
830 /**
831 * send_fin
832 */
833 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
834 {
835 int ret;
836
837 /* if we didn't get a frame get one */
838 if (!skb)
839 skb = dev_alloc_skb(MAX_CM_BUFFER);
840
841 if (!skb) {
842 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
843 return -1;
844 }
845
846 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
847 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
848
849 return ret;
850 }
851
852
853 /**
854 * find_node - find a cm node that matches the reference cm node
855 */
856 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
857 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
858 {
859 unsigned long flags;
860 struct list_head *hte;
861 struct nes_cm_node *cm_node;
862
863 /* get a handle on the hte */
864 hte = &cm_core->connected_nodes;
865
866 /* walk list and find cm_node associated with this session ID */
867 spin_lock_irqsave(&cm_core->ht_lock, flags);
868 list_for_each_entry(cm_node, hte, list) {
869 /* compare quad, return node handle if a match */
870 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
871 cm_node->loc_addr, cm_node->loc_port,
872 loc_addr, loc_port,
873 cm_node->rem_addr, cm_node->rem_port,
874 rem_addr, rem_port);
875 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
876 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
877 add_ref_cm_node(cm_node);
878 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
879 return cm_node;
880 }
881 }
882 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
883
884 /* no owner node */
885 return NULL;
886 }
887
888
889 /**
890 * find_listener - find a cm node listening on this addr-port pair
891 */
892 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
893 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
894 {
895 unsigned long flags;
896 struct nes_cm_listener *listen_node;
897
898 /* walk list and find cm_node associated with this session ID */
899 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
900 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
901 /* compare node pair, return node handle if a match */
902 if (((listen_node->loc_addr == dst_addr) ||
903 listen_node->loc_addr == 0x00000000) &&
904 (listen_node->loc_port == dst_port) &&
905 (listener_state & listen_node->listener_state)) {
906 atomic_inc(&listen_node->ref_count);
907 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
908 return listen_node;
909 }
910 }
911 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
912
913 /* no listener */
914 return NULL;
915 }
916
917
918 /**
919 * add_hte_node - add a cm node to the hash table
920 */
921 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
922 {
923 unsigned long flags;
924 struct list_head *hte;
925
926 if (!cm_node || !cm_core)
927 return -EINVAL;
928
929 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
930 cm_node);
931
932 spin_lock_irqsave(&cm_core->ht_lock, flags);
933
934 /* get a handle on the hash table element (list head for this slot) */
935 hte = &cm_core->connected_nodes;
936 list_add_tail(&cm_node->list, hte);
937 atomic_inc(&cm_core->ht_node_cnt);
938
939 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
940
941 return 0;
942 }
943
944
945 /**
946 * mini_cm_dec_refcnt_listen
947 */
948 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
949 struct nes_cm_listener *listener, int free_hanging_nodes)
950 {
951 int ret = -EINVAL;
952 int err = 0;
953 unsigned long flags;
954 struct list_head *list_pos = NULL;
955 struct list_head *list_temp = NULL;
956 struct nes_cm_node *cm_node = NULL;
957 struct list_head reset_list;
958
959 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
960 "refcnt=%d\n", listener, free_hanging_nodes,
961 atomic_read(&listener->ref_count));
962 /* free non-accelerated child nodes for this listener */
963 INIT_LIST_HEAD(&reset_list);
964 if (free_hanging_nodes) {
965 spin_lock_irqsave(&cm_core->ht_lock, flags);
966 list_for_each_safe(list_pos, list_temp,
967 &g_cm_core->connected_nodes) {
968 cm_node = container_of(list_pos, struct nes_cm_node,
969 list);
970 if ((cm_node->listener == listener) &&
971 (!cm_node->accelerated)) {
972 add_ref_cm_node(cm_node);
973 list_add(&cm_node->reset_entry, &reset_list);
974 }
975 }
976 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
977 }
978
979 list_for_each_safe(list_pos, list_temp, &reset_list) {
980 cm_node = container_of(list_pos, struct nes_cm_node,
981 reset_entry);
982 {
983 struct nes_cm_node *loopback = cm_node->loopbackpartner;
984 enum nes_cm_node_state old_state;
985 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
986 rem_ref_cm_node(cm_node->cm_core, cm_node);
987 } else {
988 if (!loopback) {
989 cleanup_retrans_entry(cm_node);
990 err = send_reset(cm_node, NULL);
991 if (err) {
992 cm_node->state =
993 NES_CM_STATE_CLOSED;
994 WARN_ON(1);
995 } else {
996 old_state = cm_node->state;
997 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
998 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
999 rem_ref_cm_node(
1000 cm_node->cm_core,
1001 cm_node);
1002 }
1003 } else {
1004 struct nes_cm_event event;
1005
1006 event.cm_node = loopback;
1007 event.cm_info.rem_addr =
1008 loopback->rem_addr;
1009 event.cm_info.loc_addr =
1010 loopback->loc_addr;
1011 event.cm_info.rem_port =
1012 loopback->rem_port;
1013 event.cm_info.loc_port =
1014 loopback->loc_port;
1015 event.cm_info.cm_id = loopback->cm_id;
1016 add_ref_cm_node(loopback);
1017 loopback->state = NES_CM_STATE_CLOSED;
1018 cm_event_connect_error(&event);
1019 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1020
1021 rem_ref_cm_node(cm_node->cm_core,
1022 cm_node);
1023
1024 }
1025 }
1026 }
1027 }
1028
1029 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1030 if (!atomic_dec_return(&listener->ref_count)) {
1031 list_del(&listener->list);
1032
1033 /* decrement our listen node count */
1034 atomic_dec(&cm_core->listen_node_cnt);
1035
1036 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1037
1038 if (listener->nesvnic) {
1039 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1040 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1041 }
1042
1043 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1044
1045 kfree(listener);
1046 listener = NULL;
1047 ret = 0;
1048 atomic_inc(&cm_listens_destroyed);
1049 } else {
1050 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1051 }
1052 if (listener) {
1053 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1054 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1055 " with non-zero pending accepts=%u\n",
1056 listener, atomic_read(&listener->pend_accepts_cnt));
1057 }
1058
1059 return ret;
1060 }
1061
1062
1063 /**
1064 * mini_cm_del_listen
1065 */
1066 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1067 struct nes_cm_listener *listener)
1068 {
1069 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1070 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1071 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1072 }
1073
1074
1075 /**
1076 * mini_cm_accelerated
1077 */
1078 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1079 struct nes_cm_node *cm_node)
1080 {
1081 u32 was_timer_set;
1082 cm_node->accelerated = 1;
1083
1084 if (cm_node->accept_pend) {
1085 BUG_ON(!cm_node->listener);
1086 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1087 cm_node->accept_pend = 0;
1088 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1089 }
1090
1091 was_timer_set = timer_pending(&cm_core->tcp_timer);
1092 if (!was_timer_set) {
1093 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1094 add_timer(&cm_core->tcp_timer);
1095 }
1096
1097 return 0;
1098 }
1099
1100
1101 /**
1102 * nes_addr_resolve_neigh
1103 */
1104 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1105 {
1106 struct rtable *rt;
1107 struct flowi fl;
1108 struct neighbour *neigh;
1109 int rc = arpindex;
1110 struct net_device *netdev;
1111 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1112
1113 memset(&fl, 0, sizeof fl);
1114 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1115 if (ip_route_output_key(&init_net, &rt, &fl)) {
1116 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1117 __func__, dst_ip);
1118 return rc;
1119 }
1120
1121 if (nesvnic->netdev->master)
1122 netdev = nesvnic->netdev->master;
1123 else
1124 netdev = nesvnic->netdev;
1125
1126 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, netdev);
1127 if (neigh) {
1128 if (neigh->nud_state & NUD_VALID) {
1129 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1130 " is %pM, Gateway is 0x%08X \n", dst_ip,
1131 neigh->ha, ntohl(rt->rt_gateway));
1132
1133 if (arpindex >= 0) {
1134 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1135 neigh->ha, ETH_ALEN)){
1136 /* Mac address same as in nes_arp_table */
1137 neigh_release(neigh);
1138 ip_rt_put(rt);
1139 return rc;
1140 }
1141
1142 nes_manage_arp_cache(nesvnic->netdev,
1143 nesadapter->arp_table[arpindex].mac_addr,
1144 dst_ip, NES_ARP_DELETE);
1145 }
1146
1147 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1148 dst_ip, NES_ARP_ADD);
1149 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1150 NES_ARP_RESOLVE);
1151 }
1152 neigh_release(neigh);
1153 }
1154
1155 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1156 neigh_event_send(rt->dst.neighbour, NULL);
1157
1158 ip_rt_put(rt);
1159 return rc;
1160 }
1161
1162 /**
1163 * make_cm_node - create a new instance of a cm node
1164 */
1165 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1166 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1167 struct nes_cm_listener *listener)
1168 {
1169 struct nes_cm_node *cm_node;
1170 struct timespec ts;
1171 int oldarpindex = 0;
1172 int arpindex = 0;
1173 struct nes_device *nesdev;
1174 struct nes_adapter *nesadapter;
1175
1176 /* create an hte and cm_node for this instance */
1177 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1178 if (!cm_node)
1179 return NULL;
1180
1181 /* set our node specific transport info */
1182 cm_node->loc_addr = cm_info->loc_addr;
1183 cm_node->rem_addr = cm_info->rem_addr;
1184 cm_node->loc_port = cm_info->loc_port;
1185 cm_node->rem_port = cm_info->rem_port;
1186 cm_node->send_write0 = send_first;
1187 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1188 &cm_node->loc_addr, cm_node->loc_port,
1189 &cm_node->rem_addr, cm_node->rem_port);
1190 cm_node->listener = listener;
1191 cm_node->netdev = nesvnic->netdev;
1192 cm_node->cm_id = cm_info->cm_id;
1193 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1194
1195 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1196 cm_node->cm_id);
1197
1198 spin_lock_init(&cm_node->retrans_list_lock);
1199
1200 cm_node->loopbackpartner = NULL;
1201 atomic_set(&cm_node->ref_count, 1);
1202 /* associate our parent CM core */
1203 cm_node->cm_core = cm_core;
1204 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1205 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1206 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1207 NES_CM_DEFAULT_RCV_WND_SCALE;
1208 ts = current_kernel_time();
1209 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1210 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1211 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1212 cm_node->tcp_cntxt.rcv_nxt = 0;
1213 /* get a unique session ID , add thread_id to an upcounter to handle race */
1214 atomic_inc(&cm_core->node_cnt);
1215 cm_node->conn_type = cm_info->conn_type;
1216 cm_node->apbvt_set = 0;
1217 cm_node->accept_pend = 0;
1218
1219 cm_node->nesvnic = nesvnic;
1220 /* get some device handles, for arp lookup */
1221 nesdev = nesvnic->nesdev;
1222 nesadapter = nesdev->nesadapter;
1223
1224 cm_node->loopbackpartner = NULL;
1225
1226 /* get the mac addr for the remote node */
1227 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1228 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1229 else {
1230 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1231 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1232
1233 }
1234 if (arpindex < 0) {
1235 kfree(cm_node);
1236 return NULL;
1237 }
1238
1239 /* copy the mac addr to node context */
1240 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1241 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1242 cm_node->rem_mac);
1243
1244 add_hte_node(cm_core, cm_node);
1245 atomic_inc(&cm_nodes_created);
1246
1247 return cm_node;
1248 }
1249
1250
1251 /**
1252 * add_ref_cm_node - destroy an instance of a cm node
1253 */
1254 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1255 {
1256 atomic_inc(&cm_node->ref_count);
1257 return 0;
1258 }
1259
1260
1261 /**
1262 * rem_ref_cm_node - destroy an instance of a cm node
1263 */
1264 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1265 struct nes_cm_node *cm_node)
1266 {
1267 unsigned long flags;
1268 struct nes_qp *nesqp;
1269
1270 if (!cm_node)
1271 return -EINVAL;
1272
1273 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1274 if (atomic_dec_return(&cm_node->ref_count)) {
1275 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1276 return 0;
1277 }
1278 list_del(&cm_node->list);
1279 atomic_dec(&cm_core->ht_node_cnt);
1280 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1281
1282 /* if the node is destroyed before connection was accelerated */
1283 if (!cm_node->accelerated && cm_node->accept_pend) {
1284 BUG_ON(!cm_node->listener);
1285 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1286 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1287 }
1288 WARN_ON(cm_node->send_entry);
1289 if (cm_node->recv_entry)
1290 handle_recv_entry(cm_node, 0);
1291 if (cm_node->listener) {
1292 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1293 } else {
1294 if (cm_node->apbvt_set && cm_node->nesvnic) {
1295 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1296 PCI_FUNC(
1297 cm_node->nesvnic->nesdev->pcidev->devfn),
1298 NES_MANAGE_APBVT_DEL);
1299 }
1300 }
1301
1302 atomic_dec(&cm_core->node_cnt);
1303 atomic_inc(&cm_nodes_destroyed);
1304 nesqp = cm_node->nesqp;
1305 if (nesqp) {
1306 nesqp->cm_node = NULL;
1307 nes_rem_ref(&nesqp->ibqp);
1308 cm_node->nesqp = NULL;
1309 }
1310
1311 kfree(cm_node);
1312 return 0;
1313 }
1314
1315 /**
1316 * process_options
1317 */
1318 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1319 u32 optionsize, u32 syn_packet)
1320 {
1321 u32 tmp;
1322 u32 offset = 0;
1323 union all_known_options *all_options;
1324 char got_mss_option = 0;
1325
1326 while (offset < optionsize) {
1327 all_options = (union all_known_options *)(optionsloc + offset);
1328 switch (all_options->as_base.optionnum) {
1329 case OPTION_NUMBER_END:
1330 offset = optionsize;
1331 break;
1332 case OPTION_NUMBER_NONE:
1333 offset += 1;
1334 continue;
1335 case OPTION_NUMBER_MSS:
1336 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1337 "Size: %d\n", __func__,
1338 all_options->as_mss.length, offset, optionsize);
1339 got_mss_option = 1;
1340 if (all_options->as_mss.length != 4) {
1341 return 1;
1342 } else {
1343 tmp = ntohs(all_options->as_mss.mss);
1344 if (tmp > 0 && tmp <
1345 cm_node->tcp_cntxt.mss)
1346 cm_node->tcp_cntxt.mss = tmp;
1347 }
1348 break;
1349 case OPTION_NUMBER_WINDOW_SCALE:
1350 cm_node->tcp_cntxt.snd_wscale =
1351 all_options->as_windowscale.shiftcount;
1352 break;
1353 case OPTION_NUMBER_WRITE0:
1354 cm_node->send_write0 = 1;
1355 break;
1356 default:
1357 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1358 all_options->as_base.optionnum);
1359 break;
1360 }
1361 offset += all_options->as_base.length;
1362 }
1363 if ((!got_mss_option) && (syn_packet))
1364 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1365 return 0;
1366 }
1367
1368 static void drop_packet(struct sk_buff *skb)
1369 {
1370 atomic_inc(&cm_accel_dropped_pkts);
1371 dev_kfree_skb_any(skb);
1372 }
1373
1374 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1375 {
1376 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1377 "refcnt=%d\n", cm_node, cm_node->state,
1378 atomic_read(&cm_node->ref_count));
1379 switch (cm_node->state) {
1380 case NES_CM_STATE_SYN_RCVD:
1381 case NES_CM_STATE_SYN_SENT:
1382 case NES_CM_STATE_ESTABLISHED:
1383 case NES_CM_STATE_MPAREJ_RCVD:
1384 cm_node->tcp_cntxt.rcv_nxt++;
1385 cleanup_retrans_entry(cm_node);
1386 cm_node->state = NES_CM_STATE_LAST_ACK;
1387 send_fin(cm_node, NULL);
1388 break;
1389 case NES_CM_STATE_MPAREQ_SENT:
1390 create_event(cm_node, NES_CM_EVENT_ABORTED);
1391 cm_node->tcp_cntxt.rcv_nxt++;
1392 cleanup_retrans_entry(cm_node);
1393 cm_node->state = NES_CM_STATE_CLOSED;
1394 add_ref_cm_node(cm_node);
1395 send_reset(cm_node, NULL);
1396 break;
1397 case NES_CM_STATE_FIN_WAIT1:
1398 cm_node->tcp_cntxt.rcv_nxt++;
1399 cleanup_retrans_entry(cm_node);
1400 cm_node->state = NES_CM_STATE_CLOSING;
1401 send_ack(cm_node, NULL);
1402 /* Wait for ACK as this is simultanous close..
1403 * After we receive ACK, do not send anything..
1404 * Just rm the node.. Done.. */
1405 break;
1406 case NES_CM_STATE_FIN_WAIT2:
1407 cm_node->tcp_cntxt.rcv_nxt++;
1408 cleanup_retrans_entry(cm_node);
1409 cm_node->state = NES_CM_STATE_TIME_WAIT;
1410 send_ack(cm_node, NULL);
1411 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1412 break;
1413 case NES_CM_STATE_TIME_WAIT:
1414 cm_node->tcp_cntxt.rcv_nxt++;
1415 cleanup_retrans_entry(cm_node);
1416 cm_node->state = NES_CM_STATE_CLOSED;
1417 rem_ref_cm_node(cm_node->cm_core, cm_node);
1418 break;
1419 case NES_CM_STATE_TSA:
1420 default:
1421 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1422 cm_node, cm_node->state);
1423 break;
1424 }
1425 }
1426
1427
1428 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1429 struct tcphdr *tcph)
1430 {
1431
1432 int reset = 0; /* whether to send reset in case of err.. */
1433 atomic_inc(&cm_resets_recvd);
1434 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1435 " refcnt=%d\n", cm_node, cm_node->state,
1436 atomic_read(&cm_node->ref_count));
1437 cleanup_retrans_entry(cm_node);
1438 switch (cm_node->state) {
1439 case NES_CM_STATE_SYN_SENT:
1440 case NES_CM_STATE_MPAREQ_SENT:
1441 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1442 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1443 cm_node->listener, cm_node->state);
1444 active_open_err(cm_node, skb, reset);
1445 break;
1446 case NES_CM_STATE_MPAREQ_RCVD:
1447 atomic_inc(&cm_node->passive_state);
1448 dev_kfree_skb_any(skb);
1449 break;
1450 case NES_CM_STATE_ESTABLISHED:
1451 case NES_CM_STATE_SYN_RCVD:
1452 case NES_CM_STATE_LISTENING:
1453 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1454 passive_open_err(cm_node, skb, reset);
1455 break;
1456 case NES_CM_STATE_TSA:
1457 active_open_err(cm_node, skb, reset);
1458 break;
1459 case NES_CM_STATE_CLOSED:
1460 drop_packet(skb);
1461 break;
1462 case NES_CM_STATE_FIN_WAIT2:
1463 case NES_CM_STATE_FIN_WAIT1:
1464 case NES_CM_STATE_LAST_ACK:
1465 cm_node->cm_id->rem_ref(cm_node->cm_id);
1466 case NES_CM_STATE_TIME_WAIT:
1467 cm_node->state = NES_CM_STATE_CLOSED;
1468 rem_ref_cm_node(cm_node->cm_core, cm_node);
1469 drop_packet(skb);
1470 break;
1471 default:
1472 drop_packet(skb);
1473 break;
1474 }
1475 }
1476
1477
1478 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1479 {
1480
1481 int ret = 0;
1482 int datasize = skb->len;
1483 u8 *dataloc = skb->data;
1484
1485 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1486 u32 res_type;
1487 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1488 if (ret) {
1489 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1490 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1491 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1492 "cm_node=%p listener=%p state=%d\n", __func__,
1493 __LINE__, cm_node, cm_node->listener,
1494 cm_node->state);
1495 active_open_err(cm_node, skb, 1);
1496 } else {
1497 passive_open_err(cm_node, skb, 1);
1498 }
1499 return;
1500 }
1501
1502 switch (cm_node->state) {
1503 case NES_CM_STATE_ESTABLISHED:
1504 if (res_type == NES_MPA_REQUEST_REJECT) {
1505 /*BIG problem as we are receiving the MPA.. So should
1506 * not be REJECT.. This is Passive Open.. We can
1507 * only receive it Reject for Active Open...*/
1508 WARN_ON(1);
1509 }
1510 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1511 type = NES_CM_EVENT_MPA_REQ;
1512 atomic_set(&cm_node->passive_state,
1513 NES_PASSIVE_STATE_INDICATED);
1514 break;
1515 case NES_CM_STATE_MPAREQ_SENT:
1516 cleanup_retrans_entry(cm_node);
1517 if (res_type == NES_MPA_REQUEST_REJECT) {
1518 type = NES_CM_EVENT_MPA_REJECT;
1519 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1520 } else {
1521 type = NES_CM_EVENT_CONNECTED;
1522 cm_node->state = NES_CM_STATE_TSA;
1523 }
1524
1525 break;
1526 default:
1527 WARN_ON(1);
1528 break;
1529 }
1530 dev_kfree_skb_any(skb);
1531 create_event(cm_node, type);
1532 }
1533
1534 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1535 {
1536 switch (cm_node->state) {
1537 case NES_CM_STATE_SYN_SENT:
1538 case NES_CM_STATE_MPAREQ_SENT:
1539 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1540 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1541 cm_node->listener, cm_node->state);
1542 active_open_err(cm_node, skb, 1);
1543 break;
1544 case NES_CM_STATE_ESTABLISHED:
1545 case NES_CM_STATE_SYN_RCVD:
1546 passive_open_err(cm_node, skb, 1);
1547 break;
1548 case NES_CM_STATE_TSA:
1549 default:
1550 drop_packet(skb);
1551 }
1552 }
1553
1554 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1555 struct sk_buff *skb)
1556 {
1557 int err;
1558
1559 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1560 if (err)
1561 active_open_err(cm_node, skb, 1);
1562
1563 return err;
1564 }
1565
1566 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1567 struct sk_buff *skb)
1568 {
1569 int err = 0;
1570 u32 seq;
1571 u32 ack_seq;
1572 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1573 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1574 u32 rcv_wnd;
1575 seq = ntohl(tcph->seq);
1576 ack_seq = ntohl(tcph->ack_seq);
1577 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1578 if (ack_seq != loc_seq_num)
1579 err = 1;
1580 else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
1581 err = 1;
1582 if (err) {
1583 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1584 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1585 cm_node->listener, cm_node->state);
1586 indicate_pkt_err(cm_node, skb);
1587 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1588 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1589 rcv_wnd);
1590 }
1591 return err;
1592 }
1593
1594 /*
1595 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1596 * is created with a listener or it may comein as rexmitted packet which in
1597 * that case will be just dropped.
1598 */
1599
1600 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1601 struct tcphdr *tcph)
1602 {
1603 int ret;
1604 u32 inc_sequence;
1605 int optionsize;
1606
1607 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1608 skb_trim(skb, 0);
1609 inc_sequence = ntohl(tcph->seq);
1610
1611 switch (cm_node->state) {
1612 case NES_CM_STATE_SYN_SENT:
1613 case NES_CM_STATE_MPAREQ_SENT:
1614 /* Rcvd syn on active open connection*/
1615 active_open_err(cm_node, skb, 1);
1616 break;
1617 case NES_CM_STATE_LISTENING:
1618 /* Passive OPEN */
1619 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1620 cm_node->listener->backlog) {
1621 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1622 "pressure \n");
1623 cm_backlog_drops++;
1624 passive_open_err(cm_node, skb, 0);
1625 break;
1626 }
1627 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1628 1);
1629 if (ret) {
1630 passive_open_err(cm_node, skb, 0);
1631 /* drop pkt */
1632 break;
1633 }
1634 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1635 BUG_ON(cm_node->send_entry);
1636 cm_node->accept_pend = 1;
1637 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1638
1639 cm_node->state = NES_CM_STATE_SYN_RCVD;
1640 send_syn(cm_node, 1, skb);
1641 break;
1642 case NES_CM_STATE_CLOSED:
1643 cleanup_retrans_entry(cm_node);
1644 add_ref_cm_node(cm_node);
1645 send_reset(cm_node, skb);
1646 break;
1647 case NES_CM_STATE_TSA:
1648 case NES_CM_STATE_ESTABLISHED:
1649 case NES_CM_STATE_FIN_WAIT1:
1650 case NES_CM_STATE_FIN_WAIT2:
1651 case NES_CM_STATE_MPAREQ_RCVD:
1652 case NES_CM_STATE_LAST_ACK:
1653 case NES_CM_STATE_CLOSING:
1654 case NES_CM_STATE_UNKNOWN:
1655 default:
1656 drop_packet(skb);
1657 break;
1658 }
1659 }
1660
1661 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1662 struct tcphdr *tcph)
1663 {
1664
1665 int ret;
1666 u32 inc_sequence;
1667 int optionsize;
1668
1669 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1670 skb_trim(skb, 0);
1671 inc_sequence = ntohl(tcph->seq);
1672 switch (cm_node->state) {
1673 case NES_CM_STATE_SYN_SENT:
1674 cleanup_retrans_entry(cm_node);
1675 /* active open */
1676 if (check_syn(cm_node, tcph, skb))
1677 return;
1678 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1679 /* setup options */
1680 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1681 if (ret) {
1682 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1683 cm_node);
1684 break;
1685 }
1686 cleanup_retrans_entry(cm_node);
1687 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1688 send_mpa_request(cm_node, skb);
1689 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1690 break;
1691 case NES_CM_STATE_MPAREQ_RCVD:
1692 /* passive open, so should not be here */
1693 passive_open_err(cm_node, skb, 1);
1694 break;
1695 case NES_CM_STATE_LISTENING:
1696 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1697 cleanup_retrans_entry(cm_node);
1698 cm_node->state = NES_CM_STATE_CLOSED;
1699 send_reset(cm_node, skb);
1700 break;
1701 case NES_CM_STATE_CLOSED:
1702 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1703 cleanup_retrans_entry(cm_node);
1704 add_ref_cm_node(cm_node);
1705 send_reset(cm_node, skb);
1706 break;
1707 case NES_CM_STATE_ESTABLISHED:
1708 case NES_CM_STATE_FIN_WAIT1:
1709 case NES_CM_STATE_FIN_WAIT2:
1710 case NES_CM_STATE_LAST_ACK:
1711 case NES_CM_STATE_TSA:
1712 case NES_CM_STATE_CLOSING:
1713 case NES_CM_STATE_UNKNOWN:
1714 case NES_CM_STATE_MPAREQ_SENT:
1715 default:
1716 drop_packet(skb);
1717 break;
1718 }
1719 }
1720
1721 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1722 struct tcphdr *tcph)
1723 {
1724 int datasize = 0;
1725 u32 inc_sequence;
1726 int ret = 0;
1727 int optionsize;
1728 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1729
1730 if (check_seq(cm_node, tcph, skb))
1731 return -EINVAL;
1732
1733 skb_pull(skb, tcph->doff << 2);
1734 inc_sequence = ntohl(tcph->seq);
1735 datasize = skb->len;
1736 switch (cm_node->state) {
1737 case NES_CM_STATE_SYN_RCVD:
1738 /* Passive OPEN */
1739 cleanup_retrans_entry(cm_node);
1740 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1741 if (ret)
1742 break;
1743 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1744 cm_node->state = NES_CM_STATE_ESTABLISHED;
1745 if (datasize) {
1746 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1747 handle_rcv_mpa(cm_node, skb);
1748 } else /* rcvd ACK only */
1749 dev_kfree_skb_any(skb);
1750 break;
1751 case NES_CM_STATE_ESTABLISHED:
1752 /* Passive OPEN */
1753 cleanup_retrans_entry(cm_node);
1754 if (datasize) {
1755 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1756 handle_rcv_mpa(cm_node, skb);
1757 } else
1758 drop_packet(skb);
1759 break;
1760 case NES_CM_STATE_MPAREQ_SENT:
1761 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1762 if (datasize) {
1763 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1764 handle_rcv_mpa(cm_node, skb);
1765 } else /* Could be just an ack pkt.. */
1766 dev_kfree_skb_any(skb);
1767 break;
1768 case NES_CM_STATE_LISTENING:
1769 cleanup_retrans_entry(cm_node);
1770 cm_node->state = NES_CM_STATE_CLOSED;
1771 send_reset(cm_node, skb);
1772 break;
1773 case NES_CM_STATE_CLOSED:
1774 cleanup_retrans_entry(cm_node);
1775 add_ref_cm_node(cm_node);
1776 send_reset(cm_node, skb);
1777 break;
1778 case NES_CM_STATE_LAST_ACK:
1779 case NES_CM_STATE_CLOSING:
1780 cleanup_retrans_entry(cm_node);
1781 cm_node->state = NES_CM_STATE_CLOSED;
1782 cm_node->cm_id->rem_ref(cm_node->cm_id);
1783 rem_ref_cm_node(cm_node->cm_core, cm_node);
1784 drop_packet(skb);
1785 break;
1786 case NES_CM_STATE_FIN_WAIT1:
1787 cleanup_retrans_entry(cm_node);
1788 drop_packet(skb);
1789 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1790 break;
1791 case NES_CM_STATE_SYN_SENT:
1792 case NES_CM_STATE_FIN_WAIT2:
1793 case NES_CM_STATE_TSA:
1794 case NES_CM_STATE_MPAREQ_RCVD:
1795 case NES_CM_STATE_UNKNOWN:
1796 default:
1797 cleanup_retrans_entry(cm_node);
1798 drop_packet(skb);
1799 break;
1800 }
1801 return ret;
1802 }
1803
1804
1805
1806 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1807 struct sk_buff *skb, int optionsize, int passive)
1808 {
1809 u8 *optionsloc = (u8 *)&tcph[1];
1810 if (optionsize) {
1811 if (process_options(cm_node, optionsloc, optionsize,
1812 (u32)tcph->syn)) {
1813 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1814 __func__, cm_node);
1815 if (passive)
1816 passive_open_err(cm_node, skb, 1);
1817 else
1818 active_open_err(cm_node, skb, 1);
1819 return 1;
1820 }
1821 }
1822
1823 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1824 cm_node->tcp_cntxt.snd_wscale;
1825
1826 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1827 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1828 return 0;
1829 }
1830
1831 /*
1832 * active_open_err() will send reset() if flag set..
1833 * It will also send ABORT event.
1834 */
1835
1836 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1837 int reset)
1838 {
1839 cleanup_retrans_entry(cm_node);
1840 if (reset) {
1841 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1842 "state=%d\n", cm_node, cm_node->state);
1843 add_ref_cm_node(cm_node);
1844 send_reset(cm_node, skb);
1845 } else
1846 dev_kfree_skb_any(skb);
1847
1848 cm_node->state = NES_CM_STATE_CLOSED;
1849 create_event(cm_node, NES_CM_EVENT_ABORTED);
1850 }
1851
1852 /*
1853 * passive_open_err() will either do a reset() or will free up the skb and
1854 * remove the cm_node.
1855 */
1856
1857 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1858 int reset)
1859 {
1860 cleanup_retrans_entry(cm_node);
1861 cm_node->state = NES_CM_STATE_CLOSED;
1862 if (reset) {
1863 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1864 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1865 send_reset(cm_node, skb);
1866 } else {
1867 dev_kfree_skb_any(skb);
1868 rem_ref_cm_node(cm_node->cm_core, cm_node);
1869 }
1870 }
1871
1872 /*
1873 * free_retrans_entry() routines assumes that the retrans_list_lock has
1874 * been acquired before calling.
1875 */
1876 static void free_retrans_entry(struct nes_cm_node *cm_node)
1877 {
1878 struct nes_timer_entry *send_entry;
1879 send_entry = cm_node->send_entry;
1880 if (send_entry) {
1881 cm_node->send_entry = NULL;
1882 dev_kfree_skb_any(send_entry->skb);
1883 kfree(send_entry);
1884 rem_ref_cm_node(cm_node->cm_core, cm_node);
1885 }
1886 }
1887
1888 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1889 {
1890 unsigned long flags;
1891
1892 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1893 free_retrans_entry(cm_node);
1894 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1895 }
1896
1897 /**
1898 * process_packet
1899 * Returns skb if to be freed, else it will return NULL if already used..
1900 */
1901 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1902 struct nes_cm_core *cm_core)
1903 {
1904 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1905 struct tcphdr *tcph = tcp_hdr(skb);
1906 u32 fin_set = 0;
1907 int ret = 0;
1908 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1909
1910 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1911 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1912 tcph->ack, tcph->rst, tcph->fin);
1913
1914 if (tcph->rst)
1915 pkt_type = NES_PKT_TYPE_RST;
1916 else if (tcph->syn) {
1917 pkt_type = NES_PKT_TYPE_SYN;
1918 if (tcph->ack)
1919 pkt_type = NES_PKT_TYPE_SYNACK;
1920 } else if (tcph->ack)
1921 pkt_type = NES_PKT_TYPE_ACK;
1922 if (tcph->fin)
1923 fin_set = 1;
1924
1925 switch (pkt_type) {
1926 case NES_PKT_TYPE_SYN:
1927 handle_syn_pkt(cm_node, skb, tcph);
1928 break;
1929 case NES_PKT_TYPE_SYNACK:
1930 handle_synack_pkt(cm_node, skb, tcph);
1931 break;
1932 case NES_PKT_TYPE_ACK:
1933 ret = handle_ack_pkt(cm_node, skb, tcph);
1934 if (fin_set && !ret)
1935 handle_fin_pkt(cm_node);
1936 break;
1937 case NES_PKT_TYPE_RST:
1938 handle_rst_pkt(cm_node, skb, tcph);
1939 break;
1940 default:
1941 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
1942 handle_fin_pkt(cm_node);
1943 drop_packet(skb);
1944 break;
1945 }
1946 }
1947
1948 /**
1949 * mini_cm_listen - create a listen node with params
1950 */
1951 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1952 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1953 {
1954 struct nes_cm_listener *listener;
1955 unsigned long flags;
1956
1957 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1958 cm_info->loc_addr, cm_info->loc_port);
1959
1960 /* cannot have multiple matching listeners */
1961 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1962 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1963 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1964 /* find automatically incs ref count ??? */
1965 atomic_dec(&listener->ref_count);
1966 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1967 return NULL;
1968 }
1969
1970 if (!listener) {
1971 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1972 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1973 if (!listener) {
1974 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1975 return NULL;
1976 }
1977
1978 listener->loc_addr = htonl(cm_info->loc_addr);
1979 listener->loc_port = htons(cm_info->loc_port);
1980 listener->reused_node = 0;
1981
1982 atomic_set(&listener->ref_count, 1);
1983 }
1984 /* pasive case */
1985 /* find already inc'ed the ref count */
1986 else {
1987 listener->reused_node = 1;
1988 }
1989
1990 listener->cm_id = cm_info->cm_id;
1991 atomic_set(&listener->pend_accepts_cnt, 0);
1992 listener->cm_core = cm_core;
1993 listener->nesvnic = nesvnic;
1994 atomic_inc(&cm_core->node_cnt);
1995
1996 listener->conn_type = cm_info->conn_type;
1997 listener->backlog = cm_info->backlog;
1998 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1999
2000 if (!listener->reused_node) {
2001 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2002 list_add(&listener->list, &cm_core->listen_list.list);
2003 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2004 atomic_inc(&cm_core->listen_node_cnt);
2005 }
2006
2007 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2008 " listener = %p, backlog = %d, cm_id = %p.\n",
2009 cm_info->loc_addr, cm_info->loc_port,
2010 listener, listener->backlog, listener->cm_id);
2011
2012 return listener;
2013 }
2014
2015
2016 /**
2017 * mini_cm_connect - make a connection node with params
2018 */
2019 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2020 struct nes_vnic *nesvnic, u16 private_data_len,
2021 void *private_data, struct nes_cm_info *cm_info)
2022 {
2023 int ret = 0;
2024 struct nes_cm_node *cm_node;
2025 struct nes_cm_listener *loopbackremotelistener;
2026 struct nes_cm_node *loopbackremotenode;
2027 struct nes_cm_info loopback_cm_info;
2028 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
2029 struct ietf_mpa_frame *mpa_frame = NULL;
2030
2031 /* create a CM connection node */
2032 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2033 if (!cm_node)
2034 return NULL;
2035 mpa_frame = &cm_node->mpa_frame;
2036 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
2037 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2038 mpa_frame->rev = IETF_MPA_VERSION;
2039 mpa_frame->priv_data_len = htons(private_data_len);
2040
2041 /* set our node side to client (active) side */
2042 cm_node->tcp_cntxt.client = 1;
2043 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2044
2045 if (cm_info->loc_addr == cm_info->rem_addr) {
2046 loopbackremotelistener = find_listener(cm_core,
2047 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2048 NES_CM_LISTENER_ACTIVE_STATE);
2049 if (loopbackremotelistener == NULL) {
2050 create_event(cm_node, NES_CM_EVENT_ABORTED);
2051 } else {
2052 loopback_cm_info = *cm_info;
2053 loopback_cm_info.loc_port = cm_info->rem_port;
2054 loopback_cm_info.rem_port = cm_info->loc_port;
2055 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2056 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2057 &loopback_cm_info, loopbackremotelistener);
2058 if (!loopbackremotenode) {
2059 rem_ref_cm_node(cm_node->cm_core, cm_node);
2060 return NULL;
2061 }
2062 atomic_inc(&cm_loopbacks);
2063 loopbackremotenode->loopbackpartner = cm_node;
2064 loopbackremotenode->tcp_cntxt.rcv_wscale =
2065 NES_CM_DEFAULT_RCV_WND_SCALE;
2066 cm_node->loopbackpartner = loopbackremotenode;
2067 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2068 private_data_len);
2069 loopbackremotenode->mpa_frame_size = private_data_len;
2070
2071 /* we are done handling this state. */
2072 /* set node to a TSA state */
2073 cm_node->state = NES_CM_STATE_TSA;
2074 cm_node->tcp_cntxt.rcv_nxt =
2075 loopbackremotenode->tcp_cntxt.loc_seq_num;
2076 loopbackremotenode->tcp_cntxt.rcv_nxt =
2077 cm_node->tcp_cntxt.loc_seq_num;
2078 cm_node->tcp_cntxt.max_snd_wnd =
2079 loopbackremotenode->tcp_cntxt.rcv_wnd;
2080 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2081 cm_node->tcp_cntxt.rcv_wnd;
2082 cm_node->tcp_cntxt.snd_wnd =
2083 loopbackremotenode->tcp_cntxt.rcv_wnd;
2084 loopbackremotenode->tcp_cntxt.snd_wnd =
2085 cm_node->tcp_cntxt.rcv_wnd;
2086 cm_node->tcp_cntxt.snd_wscale =
2087 loopbackremotenode->tcp_cntxt.rcv_wscale;
2088 loopbackremotenode->tcp_cntxt.snd_wscale =
2089 cm_node->tcp_cntxt.rcv_wscale;
2090 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2091 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2092 }
2093 return cm_node;
2094 }
2095
2096 /* set our node side to client (active) side */
2097 cm_node->tcp_cntxt.client = 1;
2098 /* init our MPA frame ptr */
2099 memcpy(mpa_frame->priv_data, private_data, private_data_len);
2100
2101 cm_node->mpa_frame_size = mpa_frame_size;
2102
2103 /* send a syn and goto syn sent state */
2104 cm_node->state = NES_CM_STATE_SYN_SENT;
2105 ret = send_syn(cm_node, 0, NULL);
2106
2107 if (ret) {
2108 /* error in sending the syn free up the cm_node struct */
2109 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2110 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2111 cm_node->rem_addr, cm_node->rem_port, cm_node,
2112 cm_node->cm_id);
2113 rem_ref_cm_node(cm_node->cm_core, cm_node);
2114 cm_node = NULL;
2115 }
2116
2117 if (cm_node)
2118 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2119 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2120 cm_node->rem_addr, cm_node->rem_port, cm_node,
2121 cm_node->cm_id);
2122
2123 return cm_node;
2124 }
2125
2126
2127 /**
2128 * mini_cm_accept - accept a connection
2129 * This function is never called
2130 */
2131 static int mini_cm_accept(struct nes_cm_core *cm_core,
2132 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2133 {
2134 return 0;
2135 }
2136
2137
2138 /**
2139 * mini_cm_reject - reject and teardown a connection
2140 */
2141 static int mini_cm_reject(struct nes_cm_core *cm_core,
2142 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2143 {
2144 int ret = 0;
2145 int err = 0;
2146 int passive_state;
2147 struct nes_cm_event event;
2148 struct iw_cm_id *cm_id = cm_node->cm_id;
2149 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2150
2151 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2152 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2153
2154 if (cm_node->tcp_cntxt.client)
2155 return ret;
2156 cleanup_retrans_entry(cm_node);
2157
2158 if (!loopback) {
2159 passive_state = atomic_add_return(1, &cm_node->passive_state);
2160 if (passive_state == NES_SEND_RESET_EVENT) {
2161 cm_node->state = NES_CM_STATE_CLOSED;
2162 rem_ref_cm_node(cm_core, cm_node);
2163 } else {
2164 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2165 rem_ref_cm_node(cm_core, cm_node);
2166 } else {
2167 ret = send_mpa_reject(cm_node);
2168 if (ret) {
2169 cm_node->state = NES_CM_STATE_CLOSED;
2170 err = send_reset(cm_node, NULL);
2171 if (err)
2172 WARN_ON(1);
2173 } else
2174 cm_id->add_ref(cm_id);
2175 }
2176 }
2177 } else {
2178 cm_node->cm_id = NULL;
2179 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2180 rem_ref_cm_node(cm_core, cm_node);
2181 rem_ref_cm_node(cm_core, loopback);
2182 } else {
2183 event.cm_node = loopback;
2184 event.cm_info.rem_addr = loopback->rem_addr;
2185 event.cm_info.loc_addr = loopback->loc_addr;
2186 event.cm_info.rem_port = loopback->rem_port;
2187 event.cm_info.loc_port = loopback->loc_port;
2188 event.cm_info.cm_id = loopback->cm_id;
2189 cm_event_mpa_reject(&event);
2190 rem_ref_cm_node(cm_core, cm_node);
2191 loopback->state = NES_CM_STATE_CLOSING;
2192
2193 cm_id = loopback->cm_id;
2194 rem_ref_cm_node(cm_core, loopback);
2195 cm_id->rem_ref(cm_id);
2196 }
2197 }
2198
2199 return ret;
2200 }
2201
2202
2203 /**
2204 * mini_cm_close
2205 */
2206 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2207 {
2208 int ret = 0;
2209
2210 if (!cm_core || !cm_node)
2211 return -EINVAL;
2212
2213 switch (cm_node->state) {
2214 case NES_CM_STATE_SYN_RCVD:
2215 case NES_CM_STATE_SYN_SENT:
2216 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2217 case NES_CM_STATE_ESTABLISHED:
2218 case NES_CM_STATE_ACCEPTING:
2219 case NES_CM_STATE_MPAREQ_SENT:
2220 case NES_CM_STATE_MPAREQ_RCVD:
2221 cleanup_retrans_entry(cm_node);
2222 send_reset(cm_node, NULL);
2223 break;
2224 case NES_CM_STATE_CLOSE_WAIT:
2225 cm_node->state = NES_CM_STATE_LAST_ACK;
2226 send_fin(cm_node, NULL);
2227 break;
2228 case NES_CM_STATE_FIN_WAIT1:
2229 case NES_CM_STATE_FIN_WAIT2:
2230 case NES_CM_STATE_LAST_ACK:
2231 case NES_CM_STATE_TIME_WAIT:
2232 case NES_CM_STATE_CLOSING:
2233 ret = -1;
2234 break;
2235 case NES_CM_STATE_LISTENING:
2236 cleanup_retrans_entry(cm_node);
2237 send_reset(cm_node, NULL);
2238 break;
2239 case NES_CM_STATE_MPAREJ_RCVD:
2240 case NES_CM_STATE_UNKNOWN:
2241 case NES_CM_STATE_INITED:
2242 case NES_CM_STATE_CLOSED:
2243 case NES_CM_STATE_LISTENER_DESTROYED:
2244 ret = rem_ref_cm_node(cm_core, cm_node);
2245 break;
2246 case NES_CM_STATE_TSA:
2247 if (cm_node->send_entry)
2248 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2249 "send_entry=%p\n", cm_node->send_entry);
2250 ret = rem_ref_cm_node(cm_core, cm_node);
2251 break;
2252 }
2253 return ret;
2254 }
2255
2256
2257 /**
2258 * recv_pkt - recv an ETHERNET packet, and process it through CM
2259 * node state machine
2260 */
2261 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2262 struct nes_vnic *nesvnic, struct sk_buff *skb)
2263 {
2264 struct nes_cm_node *cm_node = NULL;
2265 struct nes_cm_listener *listener = NULL;
2266 struct iphdr *iph;
2267 struct tcphdr *tcph;
2268 struct nes_cm_info nfo;
2269 int skb_handled = 1;
2270 __be32 tmp_daddr, tmp_saddr;
2271
2272 if (!skb)
2273 return 0;
2274 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2275 return 0;
2276 }
2277
2278 iph = (struct iphdr *)skb->data;
2279 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2280
2281 nfo.loc_addr = ntohl(iph->daddr);
2282 nfo.loc_port = ntohs(tcph->dest);
2283 nfo.rem_addr = ntohl(iph->saddr);
2284 nfo.rem_port = ntohs(tcph->source);
2285
2286 tmp_daddr = cpu_to_be32(iph->daddr);
2287 tmp_saddr = cpu_to_be32(iph->saddr);
2288
2289 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2290 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2291
2292 do {
2293 cm_node = find_node(cm_core,
2294 nfo.rem_port, nfo.rem_addr,
2295 nfo.loc_port, nfo.loc_addr);
2296
2297 if (!cm_node) {
2298 /* Only type of packet accepted are for */
2299 /* the PASSIVE open (syn only) */
2300 if ((!tcph->syn) || (tcph->ack)) {
2301 skb_handled = 0;
2302 break;
2303 }
2304 listener = find_listener(cm_core, nfo.loc_addr,
2305 nfo.loc_port,
2306 NES_CM_LISTENER_ACTIVE_STATE);
2307 if (!listener) {
2308 nfo.cm_id = NULL;
2309 nfo.conn_type = 0;
2310 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2311 skb_handled = 0;
2312 break;
2313 }
2314 nfo.cm_id = listener->cm_id;
2315 nfo.conn_type = listener->conn_type;
2316 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2317 listener);
2318 if (!cm_node) {
2319 nes_debug(NES_DBG_CM, "Unable to allocate "
2320 "node\n");
2321 cm_packets_dropped++;
2322 atomic_dec(&listener->ref_count);
2323 dev_kfree_skb_any(skb);
2324 break;
2325 }
2326 if (!tcph->rst && !tcph->fin) {
2327 cm_node->state = NES_CM_STATE_LISTENING;
2328 } else {
2329 cm_packets_dropped++;
2330 rem_ref_cm_node(cm_core, cm_node);
2331 dev_kfree_skb_any(skb);
2332 break;
2333 }
2334 add_ref_cm_node(cm_node);
2335 } else if (cm_node->state == NES_CM_STATE_TSA) {
2336 rem_ref_cm_node(cm_core, cm_node);
2337 atomic_inc(&cm_accel_dropped_pkts);
2338 dev_kfree_skb_any(skb);
2339 break;
2340 }
2341 skb_reset_network_header(skb);
2342 skb_set_transport_header(skb, sizeof(*tcph));
2343 skb->len = ntohs(iph->tot_len);
2344 process_packet(cm_node, skb, cm_core);
2345 rem_ref_cm_node(cm_core, cm_node);
2346 } while (0);
2347 return skb_handled;
2348 }
2349
2350
2351 /**
2352 * nes_cm_alloc_core - allocate a top level instance of a cm core
2353 */
2354 static struct nes_cm_core *nes_cm_alloc_core(void)
2355 {
2356 struct nes_cm_core *cm_core;
2357
2358 /* setup the CM core */
2359 /* alloc top level core control structure */
2360 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2361 if (!cm_core)
2362 return NULL;
2363
2364 INIT_LIST_HEAD(&cm_core->connected_nodes);
2365 init_timer(&cm_core->tcp_timer);
2366 cm_core->tcp_timer.function = nes_cm_timer_tick;
2367
2368 cm_core->mtu = NES_CM_DEFAULT_MTU;
2369 cm_core->state = NES_CM_STATE_INITED;
2370 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2371
2372 atomic_set(&cm_core->events_posted, 0);
2373
2374 cm_core->api = &nes_cm_api;
2375
2376 spin_lock_init(&cm_core->ht_lock);
2377 spin_lock_init(&cm_core->listen_list_lock);
2378
2379 INIT_LIST_HEAD(&cm_core->listen_list.list);
2380
2381 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2382
2383 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2384 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2385 cm_core->post_event = nes_cm_post_event;
2386 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2387 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2388
2389 print_core(cm_core);
2390 return cm_core;
2391 }
2392
2393
2394 /**
2395 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2396 */
2397 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2398 {
2399 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2400
2401 if (!cm_core)
2402 return -EINVAL;
2403
2404 barrier();
2405
2406 if (timer_pending(&cm_core->tcp_timer)) {
2407 del_timer(&cm_core->tcp_timer);
2408 }
2409
2410 destroy_workqueue(cm_core->event_wq);
2411 destroy_workqueue(cm_core->disconn_wq);
2412 nes_debug(NES_DBG_CM, "\n");
2413 kfree(cm_core);
2414
2415 return 0;
2416 }
2417
2418
2419 /**
2420 * mini_cm_get
2421 */
2422 static int mini_cm_get(struct nes_cm_core *cm_core)
2423 {
2424 return cm_core->state;
2425 }
2426
2427
2428 /**
2429 * mini_cm_set
2430 */
2431 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2432 {
2433 int ret = 0;
2434
2435 switch (type) {
2436 case NES_CM_SET_PKT_SIZE:
2437 cm_core->mtu = value;
2438 break;
2439 case NES_CM_SET_FREE_PKT_Q_SIZE:
2440 cm_core->free_tx_pkt_max = value;
2441 break;
2442 default:
2443 /* unknown set option */
2444 ret = -EINVAL;
2445 }
2446
2447 return ret;
2448 }
2449
2450
2451 /**
2452 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2453 * successfully exchanged when this is called
2454 */
2455 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2456 {
2457 int ret = 0;
2458
2459 if (!nesqp)
2460 return -EINVAL;
2461
2462 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2463 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2464 NES_QPCONTEXT_MISC_DROS);
2465
2466 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2467 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2468
2469 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2470
2471 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2472
2473 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2474 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2475
2476 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2477 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2478 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2479
2480 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2481 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2482 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2483
2484 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2485 nesqp->nesqp_context->ts_recent = 0;
2486 nesqp->nesqp_context->ts_age = 0;
2487 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2488 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2489 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2490 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2491 cm_node->tcp_cntxt.rcv_wscale);
2492 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2493 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2494 nesqp->nesqp_context->srtt = 0;
2495 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2496 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2497 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2498 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2499 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2500 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2501
2502 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2503 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2504 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2505 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2506 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2507 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2508 le32_to_cpu(nesqp->nesqp_context->misc));
2509 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2510 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2511 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2512
2513 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2514 cm_node->state = NES_CM_STATE_TSA;
2515
2516 return ret;
2517 }
2518
2519
2520 /**
2521 * nes_cm_disconn
2522 */
2523 int nes_cm_disconn(struct nes_qp *nesqp)
2524 {
2525 struct disconn_work *work;
2526
2527 work = kzalloc(sizeof *work, GFP_ATOMIC);
2528 if (!work)
2529 return -ENOMEM; /* Timer will clean up */
2530
2531 nes_add_ref(&nesqp->ibqp);
2532 work->nesqp = nesqp;
2533 INIT_WORK(&work->work, nes_disconnect_worker);
2534 queue_work(g_cm_core->disconn_wq, &work->work);
2535 return 0;
2536 }
2537
2538
2539 /**
2540 * nes_disconnect_worker
2541 */
2542 static void nes_disconnect_worker(struct work_struct *work)
2543 {
2544 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2545 struct nes_qp *nesqp = dwork->nesqp;
2546
2547 kfree(dwork);
2548 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2549 nesqp->last_aeq, nesqp->hwqp.qp_id);
2550 nes_cm_disconn_true(nesqp);
2551 nes_rem_ref(&nesqp->ibqp);
2552 }
2553
2554
2555 /**
2556 * nes_cm_disconn_true
2557 */
2558 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2559 {
2560 unsigned long flags;
2561 int ret = 0;
2562 struct iw_cm_id *cm_id;
2563 struct iw_cm_event cm_event;
2564 struct nes_vnic *nesvnic;
2565 u16 last_ae;
2566 u8 original_hw_tcp_state;
2567 u8 original_ibqp_state;
2568 enum iw_cm_event_status disconn_status = IW_CM_EVENT_STATUS_OK;
2569 int issue_disconn = 0;
2570 int issue_close = 0;
2571 int issue_flush = 0;
2572 u32 flush_q = NES_CQP_FLUSH_RQ;
2573 struct ib_event ibevent;
2574
2575 if (!nesqp) {
2576 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2577 return -1;
2578 }
2579
2580 spin_lock_irqsave(&nesqp->lock, flags);
2581 cm_id = nesqp->cm_id;
2582 /* make sure we havent already closed this connection */
2583 if (!cm_id) {
2584 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2585 nesqp->hwqp.qp_id);
2586 spin_unlock_irqrestore(&nesqp->lock, flags);
2587 return -1;
2588 }
2589
2590 nesvnic = to_nesvnic(nesqp->ibqp.device);
2591 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2592
2593 original_hw_tcp_state = nesqp->hw_tcp_state;
2594 original_ibqp_state = nesqp->ibqp_state;
2595 last_ae = nesqp->last_aeq;
2596
2597 if (nesqp->term_flags) {
2598 issue_disconn = 1;
2599 issue_close = 1;
2600 nesqp->cm_id = NULL;
2601 if (nesqp->flush_issued == 0) {
2602 nesqp->flush_issued = 1;
2603 issue_flush = 1;
2604 }
2605 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2606 ((original_ibqp_state == IB_QPS_RTS) &&
2607 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2608 issue_disconn = 1;
2609 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2610 disconn_status = IW_CM_EVENT_STATUS_RESET;
2611 }
2612
2613 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2614 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2615 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2616 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2617 issue_close = 1;
2618 nesqp->cm_id = NULL;
2619 if (nesqp->flush_issued == 0) {
2620 nesqp->flush_issued = 1;
2621 issue_flush = 1;
2622 }
2623 }
2624
2625 spin_unlock_irqrestore(&nesqp->lock, flags);
2626
2627 if ((issue_flush) && (nesqp->destroyed == 0)) {
2628 /* Flush the queue(s) */
2629 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2630 flush_q |= NES_CQP_FLUSH_SQ;
2631 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2632
2633 if (nesqp->term_flags) {
2634 ibevent.device = nesqp->ibqp.device;
2635 ibevent.event = nesqp->terminate_eventtype;
2636 ibevent.element.qp = &nesqp->ibqp;
2637 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2638 }
2639 }
2640
2641 if ((cm_id) && (cm_id->event_handler)) {
2642 if (issue_disconn) {
2643 atomic_inc(&cm_disconnects);
2644 cm_event.event = IW_CM_EVENT_DISCONNECT;
2645 cm_event.status = disconn_status;
2646 cm_event.local_addr = cm_id->local_addr;
2647 cm_event.remote_addr = cm_id->remote_addr;
2648 cm_event.private_data = NULL;
2649 cm_event.private_data_len = 0;
2650
2651 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2652 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2653 "cm_id = %p, refcount = %u.\n",
2654 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2655 nesqp->hwqp.sq_tail, cm_id,
2656 atomic_read(&nesqp->refcount));
2657
2658 ret = cm_id->event_handler(cm_id, &cm_event);
2659 if (ret)
2660 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2661 "returned, ret=%d\n", ret);
2662 }
2663
2664 if (issue_close) {
2665 atomic_inc(&cm_closes);
2666 nes_disconnect(nesqp, 1);
2667
2668 cm_id->provider_data = nesqp;
2669 /* Send up the close complete event */
2670 cm_event.event = IW_CM_EVENT_CLOSE;
2671 cm_event.status = IW_CM_EVENT_STATUS_OK;
2672 cm_event.provider_data = cm_id->provider_data;
2673 cm_event.local_addr = cm_id->local_addr;
2674 cm_event.remote_addr = cm_id->remote_addr;
2675 cm_event.private_data = NULL;
2676 cm_event.private_data_len = 0;
2677
2678 ret = cm_id->event_handler(cm_id, &cm_event);
2679 if (ret) {
2680 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2681 }
2682
2683 cm_id->rem_ref(cm_id);
2684 }
2685 }
2686
2687 return 0;
2688 }
2689
2690
2691 /**
2692 * nes_disconnect
2693 */
2694 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2695 {
2696 int ret = 0;
2697 struct nes_vnic *nesvnic;
2698 struct nes_device *nesdev;
2699 struct nes_ib_device *nesibdev;
2700
2701 nesvnic = to_nesvnic(nesqp->ibqp.device);
2702 if (!nesvnic)
2703 return -EINVAL;
2704
2705 nesdev = nesvnic->nesdev;
2706 nesibdev = nesvnic->nesibdev;
2707
2708 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2709 netdev_refcnt_read(nesvnic->netdev));
2710
2711 if (nesqp->active_conn) {
2712
2713 /* indicate this connection is NOT active */
2714 nesqp->active_conn = 0;
2715 } else {
2716 /* Need to free the Last Streaming Mode Message */
2717 if (nesqp->ietf_frame) {
2718 if (nesqp->lsmm_mr)
2719 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2720 pci_free_consistent(nesdev->pcidev,
2721 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2722 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2723 }
2724 }
2725
2726 /* close the CM node down if it is still active */
2727 if (nesqp->cm_node) {
2728 nes_debug(NES_DBG_CM, "Call close API\n");
2729
2730 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2731 }
2732
2733 return ret;
2734 }
2735
2736
2737 /**
2738 * nes_accept
2739 */
2740 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2741 {
2742 u64 u64temp;
2743 struct ib_qp *ibqp;
2744 struct nes_qp *nesqp;
2745 struct nes_vnic *nesvnic;
2746 struct nes_device *nesdev;
2747 struct nes_cm_node *cm_node;
2748 struct nes_adapter *adapter;
2749 struct ib_qp_attr attr;
2750 struct iw_cm_event cm_event;
2751 struct nes_hw_qp_wqe *wqe;
2752 struct nes_v4_quad nes_quad;
2753 u32 crc_value;
2754 int ret;
2755 int passive_state;
2756 struct nes_ib_device *nesibdev;
2757 struct ib_mr *ibmr = NULL;
2758 struct ib_phys_buf ibphysbuf;
2759 struct nes_pd *nespd;
2760 u64 tagged_offset;
2761
2762 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2763 if (!ibqp)
2764 return -EINVAL;
2765
2766 /* get all our handles */
2767 nesqp = to_nesqp(ibqp);
2768 nesvnic = to_nesvnic(nesqp->ibqp.device);
2769 nesdev = nesvnic->nesdev;
2770 adapter = nesdev->nesadapter;
2771
2772 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2773 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2774 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2775 nesvnic->netdev->name);
2776
2777 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
2778 if (cm_node->loopbackpartner)
2779 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
2780 rem_ref_cm_node(cm_node->cm_core, cm_node);
2781 return -EINVAL;
2782 }
2783
2784 passive_state = atomic_add_return(1, &cm_node->passive_state);
2785 if (passive_state == NES_SEND_RESET_EVENT) {
2786 rem_ref_cm_node(cm_node->cm_core, cm_node);
2787 return -ECONNRESET;
2788 }
2789
2790 /* associate the node with the QP */
2791 nesqp->cm_node = (void *)cm_node;
2792 cm_node->nesqp = nesqp;
2793
2794 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2795 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2796 atomic_inc(&cm_accepts);
2797
2798 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2799 netdev_refcnt_read(nesvnic->netdev));
2800
2801 /* allocate the ietf frame and space for private data */
2802 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2803 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2804 &nesqp->ietf_frame_pbase);
2805
2806 if (!nesqp->ietf_frame) {
2807 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2808 "data\n");
2809 return -ENOMEM;
2810 }
2811
2812
2813 /* setup the MPA frame */
2814 nesqp->private_data_len = conn_param->private_data_len;
2815 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2816
2817 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2818 conn_param->private_data_len);
2819
2820 nesqp->ietf_frame->priv_data_len =
2821 cpu_to_be16(conn_param->private_data_len);
2822 nesqp->ietf_frame->rev = mpa_version;
2823 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2824
2825 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2826 wqe = &nesqp->hwqp.sq_vbase[0];
2827
2828 if (cm_id->remote_addr.sin_addr.s_addr !=
2829 cm_id->local_addr.sin_addr.s_addr) {
2830 u64temp = (unsigned long)nesqp;
2831 nesibdev = nesvnic->nesibdev;
2832 nespd = nesqp->nespd;
2833 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2834 ibphysbuf.size = conn_param->private_data_len +
2835 sizeof(struct ietf_mpa_frame);
2836 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
2837 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2838 &ibphysbuf, 1,
2839 IB_ACCESS_LOCAL_WRITE,
2840 &tagged_offset);
2841 if (!ibmr) {
2842 nes_debug(NES_DBG_CM, "Unable to register memory region"
2843 "for lSMM for cm_node = %p \n",
2844 cm_node);
2845 pci_free_consistent(nesdev->pcidev,
2846 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2847 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2848 return -ENOMEM;
2849 }
2850
2851 ibmr->pd = &nespd->ibpd;
2852 ibmr->device = nespd->ibpd.device;
2853 nesqp->lsmm_mr = ibmr;
2854
2855 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2856 set_wqe_64bit_value(wqe->wqe_words,
2857 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2858 u64temp);
2859 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2860 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2861 NES_IWARP_SQ_WQE_WRPDU);
2862 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2863 cpu_to_le32(conn_param->private_data_len +
2864 sizeof(struct ietf_mpa_frame));
2865 set_wqe_64bit_value(wqe->wqe_words,
2866 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
2867 (u64)(unsigned long)nesqp->ietf_frame);
2868 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2869 cpu_to_le32(conn_param->private_data_len +
2870 sizeof(struct ietf_mpa_frame));
2871 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
2872 if (nesqp->sq_kmapped) {
2873 nesqp->sq_kmapped = 0;
2874 kunmap(nesqp->page);
2875 }
2876
2877 nesqp->nesqp_context->ird_ord_sizes |=
2878 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2879 NES_QPCONTEXT_ORDIRD_WRPDU);
2880 } else {
2881 nesqp->nesqp_context->ird_ord_sizes |=
2882 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
2883 }
2884 nesqp->skip_lsmm = 1;
2885
2886
2887 /* Cache the cm_id in the qp */
2888 nesqp->cm_id = cm_id;
2889 cm_node->cm_id = cm_id;
2890
2891 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2892 cm_id->provider_data = nesqp;
2893 nesqp->active_conn = 0;
2894
2895 if (cm_node->state == NES_CM_STATE_TSA)
2896 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2897 cm_node);
2898
2899 nes_cm_init_tsa_conn(nesqp, cm_node);
2900
2901 nesqp->nesqp_context->tcpPorts[0] =
2902 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2903 nesqp->nesqp_context->tcpPorts[1] =
2904 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2905
2906 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2907 nesqp->nesqp_context->ip0 =
2908 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2909 else
2910 nesqp->nesqp_context->ip0 =
2911 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2912
2913 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2914 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2915 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2916
2917 nesqp->nesqp_context->arp_index_vlan |=
2918 cpu_to_le32(nes_arp_table(nesdev,
2919 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2920 NES_ARP_RESOLVE) << 16);
2921
2922 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2923 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2924
2925 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2926
2927 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2928 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2929 nesqp->nesqp_context->ird_ord_sizes |=
2930 cpu_to_le32((u32)conn_param->ord);
2931
2932 memset(&nes_quad, 0, sizeof(nes_quad));
2933 nes_quad.DstIpAdrIndex =
2934 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2935 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2936 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2937 else
2938 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2939 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2940 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2941
2942 /* Produce hash key */
2943 crc_value = get_crc_value(&nes_quad);
2944 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2945 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2946 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2947
2948 nesqp->hte_index &= adapter->hte_index_mask;
2949 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2950
2951 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2952
2953 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2954 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2955 "private data length=%zu.\n", nesqp->hwqp.qp_id,
2956 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2957 ntohs(cm_id->remote_addr.sin_port),
2958 ntohl(cm_id->local_addr.sin_addr.s_addr),
2959 ntohs(cm_id->local_addr.sin_port),
2960 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2961 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2962 conn_param->private_data_len +
2963 sizeof(struct ietf_mpa_frame));
2964
2965
2966 /* notify OF layer that accept event was successful */
2967 cm_id->add_ref(cm_id);
2968 nes_add_ref(&nesqp->ibqp);
2969
2970 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2971 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2972 cm_event.provider_data = (void *)nesqp;
2973 cm_event.local_addr = cm_id->local_addr;
2974 cm_event.remote_addr = cm_id->remote_addr;
2975 cm_event.private_data = NULL;
2976 cm_event.private_data_len = 0;
2977 ret = cm_id->event_handler(cm_id, &cm_event);
2978 attr.qp_state = IB_QPS_RTS;
2979 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2980 if (cm_node->loopbackpartner) {
2981 cm_node->loopbackpartner->mpa_frame_size =
2982 nesqp->private_data_len;
2983 /* copy entire MPA frame to our cm_node's frame */
2984 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2985 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2986 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2987 }
2988 if (ret)
2989 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2990 "ret=%d\n", __func__, __LINE__, ret);
2991
2992 return 0;
2993 }
2994
2995
2996 /**
2997 * nes_reject
2998 */
2999 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3000 {
3001 struct nes_cm_node *cm_node;
3002 struct nes_cm_node *loopback;
3003
3004 struct nes_cm_core *cm_core;
3005
3006 atomic_inc(&cm_rejects);
3007 cm_node = (struct nes_cm_node *) cm_id->provider_data;
3008 loopback = cm_node->loopbackpartner;
3009 cm_core = cm_node->cm_core;
3010 cm_node->cm_id = cm_id;
3011 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
3012
3013 if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
3014 return -EINVAL;
3015
3016 memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
3017 if (loopback) {
3018 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3019 loopback->mpa_frame.priv_data_len = pdata_len;
3020 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
3021 pdata_len;
3022 } else {
3023 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
3024 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
3025 }
3026
3027 cm_node->mpa_frame.rev = mpa_version;
3028 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
3029
3030 return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
3031 }
3032
3033
3034 /**
3035 * nes_connect
3036 * setup and launch cm connect node
3037 */
3038 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3039 {
3040 struct ib_qp *ibqp;
3041 struct nes_qp *nesqp;
3042 struct nes_vnic *nesvnic;
3043 struct nes_device *nesdev;
3044 struct nes_cm_node *cm_node;
3045 struct nes_cm_info cm_info;
3046 int apbvt_set = 0;
3047
3048 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3049 if (!ibqp)
3050 return -EINVAL;
3051 nesqp = to_nesqp(ibqp);
3052 if (!nesqp)
3053 return -EINVAL;
3054 nesvnic = to_nesvnic(nesqp->ibqp.device);
3055 if (!nesvnic)
3056 return -EINVAL;
3057 nesdev = nesvnic->nesdev;
3058 if (!nesdev)
3059 return -EINVAL;
3060
3061 if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3062 return -EINVAL;
3063
3064 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3065 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3066 ntohl(nesvnic->local_ipaddr),
3067 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3068 ntohs(cm_id->remote_addr.sin_port),
3069 ntohl(cm_id->local_addr.sin_addr.s_addr),
3070 ntohs(cm_id->local_addr.sin_port));
3071
3072 atomic_inc(&cm_connects);
3073 nesqp->active_conn = 1;
3074
3075 /* cache the cm_id in the qp */
3076 nesqp->cm_id = cm_id;
3077
3078 cm_id->provider_data = nesqp;
3079
3080 nesqp->private_data_len = conn_param->private_data_len;
3081 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3082 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3083 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3084 conn_param->private_data_len);
3085
3086 if (cm_id->local_addr.sin_addr.s_addr !=
3087 cm_id->remote_addr.sin_addr.s_addr) {
3088 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3089 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3090 apbvt_set = 1;
3091 }
3092
3093 /* set up the connection params for the node */
3094 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3095 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3096 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3097 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3098 cm_info.cm_id = cm_id;
3099 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3100
3101 cm_id->add_ref(cm_id);
3102
3103 /* create a connect CM node connection */
3104 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3105 conn_param->private_data_len, (void *)conn_param->private_data,
3106 &cm_info);
3107 if (!cm_node) {
3108 if (apbvt_set)
3109 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3110 PCI_FUNC(nesdev->pcidev->devfn),
3111 NES_MANAGE_APBVT_DEL);
3112
3113 cm_id->rem_ref(cm_id);
3114 return -ENOMEM;
3115 }
3116
3117 cm_node->apbvt_set = apbvt_set;
3118 nesqp->cm_node = cm_node;
3119 cm_node->nesqp = nesqp;
3120 nes_add_ref(&nesqp->ibqp);
3121
3122 return 0;
3123 }
3124
3125
3126 /**
3127 * nes_create_listen
3128 */
3129 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3130 {
3131 struct nes_vnic *nesvnic;
3132 struct nes_cm_listener *cm_node;
3133 struct nes_cm_info cm_info;
3134 int err;
3135
3136 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3137 cm_id, ntohs(cm_id->local_addr.sin_port));
3138
3139 nesvnic = to_nesvnic(cm_id->device);
3140 if (!nesvnic)
3141 return -EINVAL;
3142
3143 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3144 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3145
3146 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3147 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3148
3149 /* setup listen params in our api call struct */
3150 cm_info.loc_addr = nesvnic->local_ipaddr;
3151 cm_info.loc_port = cm_id->local_addr.sin_port;
3152 cm_info.backlog = backlog;
3153 cm_info.cm_id = cm_id;
3154
3155 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3156
3157
3158 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3159 if (!cm_node) {
3160 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3161 __func__, __LINE__);
3162 return -ENOMEM;
3163 }
3164
3165 cm_id->provider_data = cm_node;
3166
3167 if (!cm_node->reused_node) {
3168 err = nes_manage_apbvt(nesvnic,
3169 ntohs(cm_id->local_addr.sin_port),
3170 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3171 NES_MANAGE_APBVT_ADD);
3172 if (err) {
3173 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3174 err);
3175 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3176 return err;
3177 }
3178 atomic_inc(&cm_listens_created);
3179 }
3180
3181 cm_id->add_ref(cm_id);
3182 cm_id->provider_data = (void *)cm_node;
3183
3184
3185 return 0;
3186 }
3187
3188
3189 /**
3190 * nes_destroy_listen
3191 */
3192 int nes_destroy_listen(struct iw_cm_id *cm_id)
3193 {
3194 if (cm_id->provider_data)
3195 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3196 else
3197 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3198
3199 cm_id->rem_ref(cm_id);
3200
3201 return 0;
3202 }
3203
3204
3205 /**
3206 * nes_cm_recv
3207 */
3208 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3209 {
3210 int rc = 0;
3211 cm_packets_received++;
3212 if ((g_cm_core) && (g_cm_core->api)) {
3213 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3214 } else {
3215 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3216 " cm is not setup properly.\n");
3217 }
3218
3219 return rc;
3220 }
3221
3222
3223 /**
3224 * nes_cm_start
3225 * Start and init a cm core module
3226 */
3227 int nes_cm_start(void)
3228 {
3229 nes_debug(NES_DBG_CM, "\n");
3230 /* create the primary CM core, pass this handle to subsequent core inits */
3231 g_cm_core = nes_cm_alloc_core();
3232 if (g_cm_core) {
3233 return 0;
3234 } else {
3235 return -ENOMEM;
3236 }
3237 }
3238
3239
3240 /**
3241 * nes_cm_stop
3242 * stop and dealloc all cm core instances
3243 */
3244 int nes_cm_stop(void)
3245 {
3246 g_cm_core->api->destroy_cm_core(g_cm_core);
3247 return 0;
3248 }
3249
3250
3251 /**
3252 * cm_event_connected
3253 * handle a connected event, setup QPs and HW
3254 */
3255 static void cm_event_connected(struct nes_cm_event *event)
3256 {
3257 u64 u64temp;
3258 struct nes_qp *nesqp;
3259 struct nes_vnic *nesvnic;
3260 struct nes_device *nesdev;
3261 struct nes_cm_node *cm_node;
3262 struct nes_adapter *nesadapter;
3263 struct ib_qp_attr attr;
3264 struct iw_cm_id *cm_id;
3265 struct iw_cm_event cm_event;
3266 struct nes_hw_qp_wqe *wqe;
3267 struct nes_v4_quad nes_quad;
3268 u32 crc_value;
3269 int ret;
3270
3271 /* get all our handles */
3272 cm_node = event->cm_node;
3273 cm_id = cm_node->cm_id;
3274 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3275 nesqp = (struct nes_qp *)cm_id->provider_data;
3276 nesvnic = to_nesvnic(nesqp->ibqp.device);
3277 nesdev = nesvnic->nesdev;
3278 nesadapter = nesdev->nesadapter;
3279
3280 if (nesqp->destroyed) {
3281 return;
3282 }
3283 atomic_inc(&cm_connecteds);
3284 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3285 " local port 0x%04X. jiffies = %lu.\n",
3286 nesqp->hwqp.qp_id,
3287 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3288 ntohs(cm_id->remote_addr.sin_port),
3289 ntohs(cm_id->local_addr.sin_port),
3290 jiffies);
3291
3292 nes_cm_init_tsa_conn(nesqp, cm_node);
3293
3294 /* set the QP tsa context */
3295 nesqp->nesqp_context->tcpPorts[0] =
3296 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3297 nesqp->nesqp_context->tcpPorts[1] =
3298 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3299 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3300 nesqp->nesqp_context->ip0 =
3301 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3302 else
3303 nesqp->nesqp_context->ip0 =
3304 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3305
3306 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3307 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3308 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3309 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3310 nes_arp_table(nesdev,
3311 le32_to_cpu(nesqp->nesqp_context->ip0),
3312 NULL, NES_ARP_RESOLVE) << 16);
3313 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3314 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3315 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3316 nesqp->nesqp_context->ird_ord_sizes |=
3317 cpu_to_le32((u32)1 <<
3318 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3319
3320 /* Adjust tail for not having a LSMM */
3321 nesqp->hwqp.sq_tail = 1;
3322
3323 #if defined(NES_SEND_FIRST_WRITE)
3324 if (cm_node->send_write0) {
3325 nes_debug(NES_DBG_CM, "Sending first write.\n");
3326 wqe = &nesqp->hwqp.sq_vbase[0];
3327 u64temp = (unsigned long)nesqp;
3328 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3329 set_wqe_64bit_value(wqe->wqe_words,
3330 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3331 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3332 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3333 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3334 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3335 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3336 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3337 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3338
3339 if (nesqp->sq_kmapped) {
3340 nesqp->sq_kmapped = 0;
3341 kunmap(nesqp->page);
3342 }
3343
3344 /* use the reserved spot on the WQ for the extra first WQE */
3345 nesqp->nesqp_context->ird_ord_sizes &=
3346 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3347 NES_QPCONTEXT_ORDIRD_WRPDU |
3348 NES_QPCONTEXT_ORDIRD_ALSMM));
3349 nesqp->skip_lsmm = 1;
3350 nesqp->hwqp.sq_tail = 0;
3351 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3352 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3353 }
3354 #endif
3355
3356 memset(&nes_quad, 0, sizeof(nes_quad));
3357
3358 nes_quad.DstIpAdrIndex =
3359 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3360 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3361 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3362 else
3363 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3364 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3365 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3366
3367 /* Produce hash key */
3368 crc_value = get_crc_value(&nes_quad);
3369 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3370 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3371 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3372
3373 nesqp->hte_index &= nesadapter->hte_index_mask;
3374 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3375
3376 nesqp->ietf_frame = &cm_node->mpa_frame;
3377 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3378 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3379
3380 /* notify OF layer we successfully created the requested connection */
3381 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3382 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3383 cm_event.provider_data = cm_id->provider_data;
3384 cm_event.local_addr.sin_family = AF_INET;
3385 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3386 cm_event.remote_addr = cm_id->remote_addr;
3387
3388 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3389 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3390
3391 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3392 ret = cm_id->event_handler(cm_id, &cm_event);
3393 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3394
3395 if (ret)
3396 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3397 "ret=%d\n", __func__, __LINE__, ret);
3398 attr.qp_state = IB_QPS_RTS;
3399 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3400
3401 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3402 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3403
3404 return;
3405 }
3406
3407
3408 /**
3409 * cm_event_connect_error
3410 */
3411 static void cm_event_connect_error(struct nes_cm_event *event)
3412 {
3413 struct nes_qp *nesqp;
3414 struct iw_cm_id *cm_id;
3415 struct iw_cm_event cm_event;
3416 /* struct nes_cm_info cm_info; */
3417 int ret;
3418
3419 if (!event->cm_node)
3420 return;
3421
3422 cm_id = event->cm_node->cm_id;
3423 if (!cm_id) {
3424 return;
3425 }
3426
3427 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3428 nesqp = cm_id->provider_data;
3429
3430 if (!nesqp) {
3431 return;
3432 }
3433
3434 /* notify OF layer about this connection error event */
3435 /* cm_id->rem_ref(cm_id); */
3436 nesqp->cm_id = NULL;
3437 cm_id->provider_data = NULL;
3438 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3439 cm_event.status = -ECONNRESET;
3440 cm_event.provider_data = cm_id->provider_data;
3441 cm_event.local_addr = cm_id->local_addr;
3442 cm_event.remote_addr = cm_id->remote_addr;
3443 cm_event.private_data = NULL;
3444 cm_event.private_data_len = 0;
3445
3446 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3447 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3448 cm_event.remote_addr.sin_addr.s_addr);
3449
3450 ret = cm_id->event_handler(cm_id, &cm_event);
3451 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3452 if (ret)
3453 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3454 "ret=%d\n", __func__, __LINE__, ret);
3455 cm_id->rem_ref(cm_id);
3456
3457 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3458 return;
3459 }
3460
3461
3462 /**
3463 * cm_event_reset
3464 */
3465 static void cm_event_reset(struct nes_cm_event *event)
3466 {
3467 struct nes_qp *nesqp;
3468 struct iw_cm_id *cm_id;
3469 struct iw_cm_event cm_event;
3470 /* struct nes_cm_info cm_info; */
3471 int ret;
3472
3473 if (!event->cm_node)
3474 return;
3475
3476 if (!event->cm_node->cm_id)
3477 return;
3478
3479 cm_id = event->cm_node->cm_id;
3480
3481 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3482 nesqp = cm_id->provider_data;
3483 if (!nesqp)
3484 return;
3485
3486 nesqp->cm_id = NULL;
3487 /* cm_id->provider_data = NULL; */
3488 cm_event.event = IW_CM_EVENT_DISCONNECT;
3489 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3490 cm_event.provider_data = cm_id->provider_data;
3491 cm_event.local_addr = cm_id->local_addr;
3492 cm_event.remote_addr = cm_id->remote_addr;
3493 cm_event.private_data = NULL;
3494 cm_event.private_data_len = 0;
3495
3496 cm_id->add_ref(cm_id);
3497 ret = cm_id->event_handler(cm_id, &cm_event);
3498 atomic_inc(&cm_closes);
3499 cm_event.event = IW_CM_EVENT_CLOSE;
3500 cm_event.status = IW_CM_EVENT_STATUS_OK;
3501 cm_event.provider_data = cm_id->provider_data;
3502 cm_event.local_addr = cm_id->local_addr;
3503 cm_event.remote_addr = cm_id->remote_addr;
3504 cm_event.private_data = NULL;
3505 cm_event.private_data_len = 0;
3506 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3507 ret = cm_id->event_handler(cm_id, &cm_event);
3508
3509 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3510
3511
3512 /* notify OF layer about this connection error event */
3513 cm_id->rem_ref(cm_id);
3514
3515 return;
3516 }
3517
3518
3519 /**
3520 * cm_event_mpa_req
3521 */
3522 static void cm_event_mpa_req(struct nes_cm_event *event)
3523 {
3524 struct iw_cm_id *cm_id;
3525 struct iw_cm_event cm_event;
3526 int ret;
3527 struct nes_cm_node *cm_node;
3528
3529 cm_node = event->cm_node;
3530 if (!cm_node)
3531 return;
3532 cm_id = cm_node->cm_id;
3533
3534 atomic_inc(&cm_connect_reqs);
3535 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3536 cm_node, cm_id, jiffies);
3537
3538 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3539 cm_event.status = IW_CM_EVENT_STATUS_OK;
3540 cm_event.provider_data = (void *)cm_node;
3541
3542 cm_event.local_addr.sin_family = AF_INET;
3543 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3544 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3545
3546 cm_event.remote_addr.sin_family = AF_INET;
3547 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3548 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3549 cm_event.private_data = cm_node->mpa_frame_buf;
3550 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3551
3552 ret = cm_id->event_handler(cm_id, &cm_event);
3553 if (ret)
3554 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3555 __func__, __LINE__, ret);
3556 return;
3557 }
3558
3559
3560 static void cm_event_mpa_reject(struct nes_cm_event *event)
3561 {
3562 struct iw_cm_id *cm_id;
3563 struct iw_cm_event cm_event;
3564 struct nes_cm_node *cm_node;
3565 int ret;
3566
3567 cm_node = event->cm_node;
3568 if (!cm_node)
3569 return;
3570 cm_id = cm_node->cm_id;
3571
3572 atomic_inc(&cm_connect_reqs);
3573 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3574 cm_node, cm_id, jiffies);
3575
3576 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3577 cm_event.status = -ECONNREFUSED;
3578 cm_event.provider_data = cm_id->provider_data;
3579
3580 cm_event.local_addr.sin_family = AF_INET;
3581 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3582 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3583
3584 cm_event.remote_addr.sin_family = AF_INET;
3585 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3586 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3587
3588 cm_event.private_data = cm_node->mpa_frame_buf;
3589 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3590
3591 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3592 "remove_addr=%08x\n",
3593 cm_event.local_addr.sin_addr.s_addr,
3594 cm_event.remote_addr.sin_addr.s_addr);
3595
3596 ret = cm_id->event_handler(cm_id, &cm_event);
3597 if (ret)
3598 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3599 __func__, __LINE__, ret);
3600
3601 return;
3602 }
3603
3604
3605 static void nes_cm_event_handler(struct work_struct *);
3606
3607 /**
3608 * nes_cm_post_event
3609 * post an event to the cm event handler
3610 */
3611 static int nes_cm_post_event(struct nes_cm_event *event)
3612 {
3613 atomic_inc(&event->cm_node->cm_core->events_posted);
3614 add_ref_cm_node(event->cm_node);
3615 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3616 INIT_WORK(&event->event_work, nes_cm_event_handler);
3617 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3618 event->cm_node, event);
3619
3620 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3621
3622 nes_debug(NES_DBG_CM, "Exit\n");
3623 return 0;
3624 }
3625
3626
3627 /**
3628 * nes_cm_event_handler
3629 * worker function to handle cm events
3630 * will free instance of nes_cm_event
3631 */
3632 static void nes_cm_event_handler(struct work_struct *work)
3633 {
3634 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3635 event_work);
3636 struct nes_cm_core *cm_core;
3637
3638 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3639 return;
3640
3641 cm_core = event->cm_node->cm_core;
3642 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3643 event, event->type, atomic_read(&cm_core->events_posted));
3644
3645 switch (event->type) {
3646 case NES_CM_EVENT_MPA_REQ:
3647 cm_event_mpa_req(event);
3648 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3649 event->cm_node);
3650 break;
3651 case NES_CM_EVENT_RESET:
3652 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3653 event->cm_node);
3654 cm_event_reset(event);
3655 break;
3656 case NES_CM_EVENT_CONNECTED:
3657 if ((!event->cm_node->cm_id) ||
3658 (event->cm_node->state != NES_CM_STATE_TSA))
3659 break;
3660 cm_event_connected(event);
3661 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3662 break;
3663 case NES_CM_EVENT_MPA_REJECT:
3664 if ((!event->cm_node->cm_id) ||
3665 (event->cm_node->state == NES_CM_STATE_TSA))
3666 break;
3667 cm_event_mpa_reject(event);
3668 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3669 break;
3670
3671 case NES_CM_EVENT_ABORTED:
3672 if ((!event->cm_node->cm_id) ||
3673 (event->cm_node->state == NES_CM_STATE_TSA))
3674 break;
3675 cm_event_connect_error(event);
3676 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3677 break;
3678 case NES_CM_EVENT_DROPPED_PKT:
3679 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3680 break;
3681 default:
3682 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3683 break;
3684 }
3685
3686 atomic_dec(&cm_core->events_posted);
3687 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3688 rem_ref_cm_node(cm_core, event->cm_node);
3689 kfree(event);
3690
3691 return;
3692 }