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Merge 3.1-rc1 into usb-linus
[zen-stable.git] / drivers / infiniband / hw / nes / nes_cm.c
blobc118663e44377b2bba3cfb8d1bf246928a131004
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 <linux/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 neighbour *neigh;
1108 int rc = arpindex;
1109 struct net_device *netdev;
1110 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1111
1112 rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
1113 if (IS_ERR(rt)) {
1114 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1115 __func__, dst_ip);
1116 return rc;
1117 }
1118
1119 if (netif_is_bond_slave(nesvnic->netdev))
1120 netdev = nesvnic->netdev->master;
1121 else
1122 netdev = nesvnic->netdev;
1123
1124 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, netdev);
1125 if (neigh) {
1126 if (neigh->nud_state & NUD_VALID) {
1127 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1128 " is %pM, Gateway is 0x%08X \n", dst_ip,
1129 neigh->ha, ntohl(rt->rt_gateway));
1130
1131 if (arpindex >= 0) {
1132 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1133 neigh->ha, ETH_ALEN)){
1134 /* Mac address same as in nes_arp_table */
1135 neigh_release(neigh);
1136 ip_rt_put(rt);
1137 return rc;
1138 }
1139
1140 nes_manage_arp_cache(nesvnic->netdev,
1141 nesadapter->arp_table[arpindex].mac_addr,
1142 dst_ip, NES_ARP_DELETE);
1143 }
1144
1145 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1146 dst_ip, NES_ARP_ADD);
1147 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1148 NES_ARP_RESOLVE);
1149 }
1150 neigh_release(neigh);
1151 }
1152
1153 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1154 neigh_event_send(dst_get_neighbour(&rt->dst), NULL);
1155
1156 ip_rt_put(rt);
1157 return rc;
1158 }
1159
1160 /**
1161 * make_cm_node - create a new instance of a cm node
1162 */
1163 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1164 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1165 struct nes_cm_listener *listener)
1166 {
1167 struct nes_cm_node *cm_node;
1168 struct timespec ts;
1169 int oldarpindex = 0;
1170 int arpindex = 0;
1171 struct nes_device *nesdev;
1172 struct nes_adapter *nesadapter;
1173
1174 /* create an hte and cm_node for this instance */
1175 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1176 if (!cm_node)
1177 return NULL;
1178
1179 /* set our node specific transport info */
1180 cm_node->loc_addr = cm_info->loc_addr;
1181 cm_node->rem_addr = cm_info->rem_addr;
1182 cm_node->loc_port = cm_info->loc_port;
1183 cm_node->rem_port = cm_info->rem_port;
1184 cm_node->send_write0 = send_first;
1185 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1186 &cm_node->loc_addr, cm_node->loc_port,
1187 &cm_node->rem_addr, cm_node->rem_port);
1188 cm_node->listener = listener;
1189 cm_node->netdev = nesvnic->netdev;
1190 cm_node->cm_id = cm_info->cm_id;
1191 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1192
1193 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1194 cm_node->cm_id);
1195
1196 spin_lock_init(&cm_node->retrans_list_lock);
1197
1198 cm_node->loopbackpartner = NULL;
1199 atomic_set(&cm_node->ref_count, 1);
1200 /* associate our parent CM core */
1201 cm_node->cm_core = cm_core;
1202 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1203 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1204 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1205 NES_CM_DEFAULT_RCV_WND_SCALE;
1206 ts = current_kernel_time();
1207 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1208 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1209 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1210 cm_node->tcp_cntxt.rcv_nxt = 0;
1211 /* get a unique session ID , add thread_id to an upcounter to handle race */
1212 atomic_inc(&cm_core->node_cnt);
1213 cm_node->conn_type = cm_info->conn_type;
1214 cm_node->apbvt_set = 0;
1215 cm_node->accept_pend = 0;
1216
1217 cm_node->nesvnic = nesvnic;
1218 /* get some device handles, for arp lookup */
1219 nesdev = nesvnic->nesdev;
1220 nesadapter = nesdev->nesadapter;
1221
1222 cm_node->loopbackpartner = NULL;
1223
1224 /* get the mac addr for the remote node */
1225 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1226 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1227 else {
1228 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1229 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1230
1231 }
1232 if (arpindex < 0) {
1233 kfree(cm_node);
1234 return NULL;
1235 }
1236
1237 /* copy the mac addr to node context */
1238 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1239 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1240 cm_node->rem_mac);
1241
1242 add_hte_node(cm_core, cm_node);
1243 atomic_inc(&cm_nodes_created);
1244
1245 return cm_node;
1246 }
1247
1248
1249 /**
1250 * add_ref_cm_node - destroy an instance of a cm node
1251 */
1252 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1253 {
1254 atomic_inc(&cm_node->ref_count);
1255 return 0;
1256 }
1257
1258
1259 /**
1260 * rem_ref_cm_node - destroy an instance of a cm node
1261 */
1262 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1263 struct nes_cm_node *cm_node)
1264 {
1265 unsigned long flags;
1266 struct nes_qp *nesqp;
1267
1268 if (!cm_node)
1269 return -EINVAL;
1270
1271 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1272 if (atomic_dec_return(&cm_node->ref_count)) {
1273 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1274 return 0;
1275 }
1276 list_del(&cm_node->list);
1277 atomic_dec(&cm_core->ht_node_cnt);
1278 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1279
1280 /* if the node is destroyed before connection was accelerated */
1281 if (!cm_node->accelerated && cm_node->accept_pend) {
1282 BUG_ON(!cm_node->listener);
1283 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1284 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1285 }
1286 WARN_ON(cm_node->send_entry);
1287 if (cm_node->recv_entry)
1288 handle_recv_entry(cm_node, 0);
1289 if (cm_node->listener) {
1290 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1291 } else {
1292 if (cm_node->apbvt_set && cm_node->nesvnic) {
1293 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1294 PCI_FUNC(
1295 cm_node->nesvnic->nesdev->pcidev->devfn),
1296 NES_MANAGE_APBVT_DEL);
1297 }
1298 }
1299
1300 atomic_dec(&cm_core->node_cnt);
1301 atomic_inc(&cm_nodes_destroyed);
1302 nesqp = cm_node->nesqp;
1303 if (nesqp) {
1304 nesqp->cm_node = NULL;
1305 nes_rem_ref(&nesqp->ibqp);
1306 cm_node->nesqp = NULL;
1307 }
1308
1309 kfree(cm_node);
1310 return 0;
1311 }
1312
1313 /**
1314 * process_options
1315 */
1316 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1317 u32 optionsize, u32 syn_packet)
1318 {
1319 u32 tmp;
1320 u32 offset = 0;
1321 union all_known_options *all_options;
1322 char got_mss_option = 0;
1323
1324 while (offset < optionsize) {
1325 all_options = (union all_known_options *)(optionsloc + offset);
1326 switch (all_options->as_base.optionnum) {
1327 case OPTION_NUMBER_END:
1328 offset = optionsize;
1329 break;
1330 case OPTION_NUMBER_NONE:
1331 offset += 1;
1332 continue;
1333 case OPTION_NUMBER_MSS:
1334 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1335 "Size: %d\n", __func__,
1336 all_options->as_mss.length, offset, optionsize);
1337 got_mss_option = 1;
1338 if (all_options->as_mss.length != 4) {
1339 return 1;
1340 } else {
1341 tmp = ntohs(all_options->as_mss.mss);
1342 if (tmp > 0 && tmp <
1343 cm_node->tcp_cntxt.mss)
1344 cm_node->tcp_cntxt.mss = tmp;
1345 }
1346 break;
1347 case OPTION_NUMBER_WINDOW_SCALE:
1348 cm_node->tcp_cntxt.snd_wscale =
1349 all_options->as_windowscale.shiftcount;
1350 break;
1351 case OPTION_NUMBER_WRITE0:
1352 cm_node->send_write0 = 1;
1353 break;
1354 default:
1355 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1356 all_options->as_base.optionnum);
1357 break;
1358 }
1359 offset += all_options->as_base.length;
1360 }
1361 if ((!got_mss_option) && (syn_packet))
1362 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1363 return 0;
1364 }
1365
1366 static void drop_packet(struct sk_buff *skb)
1367 {
1368 atomic_inc(&cm_accel_dropped_pkts);
1369 dev_kfree_skb_any(skb);
1370 }
1371
1372 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1373 {
1374 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1375 "refcnt=%d\n", cm_node, cm_node->state,
1376 atomic_read(&cm_node->ref_count));
1377 switch (cm_node->state) {
1378 case NES_CM_STATE_SYN_RCVD:
1379 case NES_CM_STATE_SYN_SENT:
1380 case NES_CM_STATE_ESTABLISHED:
1381 case NES_CM_STATE_MPAREJ_RCVD:
1382 cm_node->tcp_cntxt.rcv_nxt++;
1383 cleanup_retrans_entry(cm_node);
1384 cm_node->state = NES_CM_STATE_LAST_ACK;
1385 send_fin(cm_node, NULL);
1386 break;
1387 case NES_CM_STATE_MPAREQ_SENT:
1388 create_event(cm_node, NES_CM_EVENT_ABORTED);
1389 cm_node->tcp_cntxt.rcv_nxt++;
1390 cleanup_retrans_entry(cm_node);
1391 cm_node->state = NES_CM_STATE_CLOSED;
1392 add_ref_cm_node(cm_node);
1393 send_reset(cm_node, NULL);
1394 break;
1395 case NES_CM_STATE_FIN_WAIT1:
1396 cm_node->tcp_cntxt.rcv_nxt++;
1397 cleanup_retrans_entry(cm_node);
1398 cm_node->state = NES_CM_STATE_CLOSING;
1399 send_ack(cm_node, NULL);
1400 /* Wait for ACK as this is simultaneous close..
1401 * After we receive ACK, do not send anything..
1402 * Just rm the node.. Done.. */
1403 break;
1404 case NES_CM_STATE_FIN_WAIT2:
1405 cm_node->tcp_cntxt.rcv_nxt++;
1406 cleanup_retrans_entry(cm_node);
1407 cm_node->state = NES_CM_STATE_TIME_WAIT;
1408 send_ack(cm_node, NULL);
1409 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1410 break;
1411 case NES_CM_STATE_TIME_WAIT:
1412 cm_node->tcp_cntxt.rcv_nxt++;
1413 cleanup_retrans_entry(cm_node);
1414 cm_node->state = NES_CM_STATE_CLOSED;
1415 rem_ref_cm_node(cm_node->cm_core, cm_node);
1416 break;
1417 case NES_CM_STATE_TSA:
1418 default:
1419 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1420 cm_node, cm_node->state);
1421 break;
1422 }
1423 }
1424
1425
1426 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1427 struct tcphdr *tcph)
1428 {
1429
1430 int reset = 0; /* whether to send reset in case of err.. */
1431 atomic_inc(&cm_resets_recvd);
1432 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1433 " refcnt=%d\n", cm_node, cm_node->state,
1434 atomic_read(&cm_node->ref_count));
1435 cleanup_retrans_entry(cm_node);
1436 switch (cm_node->state) {
1437 case NES_CM_STATE_SYN_SENT:
1438 case NES_CM_STATE_MPAREQ_SENT:
1439 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1440 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1441 cm_node->listener, cm_node->state);
1442 active_open_err(cm_node, skb, reset);
1443 break;
1444 case NES_CM_STATE_MPAREQ_RCVD:
1445 atomic_inc(&cm_node->passive_state);
1446 dev_kfree_skb_any(skb);
1447 break;
1448 case NES_CM_STATE_ESTABLISHED:
1449 case NES_CM_STATE_SYN_RCVD:
1450 case NES_CM_STATE_LISTENING:
1451 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1452 passive_open_err(cm_node, skb, reset);
1453 break;
1454 case NES_CM_STATE_TSA:
1455 active_open_err(cm_node, skb, reset);
1456 break;
1457 case NES_CM_STATE_CLOSED:
1458 drop_packet(skb);
1459 break;
1460 case NES_CM_STATE_FIN_WAIT2:
1461 case NES_CM_STATE_FIN_WAIT1:
1462 case NES_CM_STATE_LAST_ACK:
1463 cm_node->cm_id->rem_ref(cm_node->cm_id);
1464 case NES_CM_STATE_TIME_WAIT:
1465 cm_node->state = NES_CM_STATE_CLOSED;
1466 rem_ref_cm_node(cm_node->cm_core, cm_node);
1467 drop_packet(skb);
1468 break;
1469 default:
1470 drop_packet(skb);
1471 break;
1472 }
1473 }
1474
1475
1476 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1477 {
1478
1479 int ret = 0;
1480 int datasize = skb->len;
1481 u8 *dataloc = skb->data;
1482
1483 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1484 u32 res_type;
1485 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1486 if (ret) {
1487 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1488 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1489 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1490 "cm_node=%p listener=%p state=%d\n", __func__,
1491 __LINE__, cm_node, cm_node->listener,
1492 cm_node->state);
1493 active_open_err(cm_node, skb, 1);
1494 } else {
1495 passive_open_err(cm_node, skb, 1);
1496 }
1497 return;
1498 }
1499
1500 switch (cm_node->state) {
1501 case NES_CM_STATE_ESTABLISHED:
1502 if (res_type == NES_MPA_REQUEST_REJECT) {
1503 /*BIG problem as we are receiving the MPA.. So should
1504 * not be REJECT.. This is Passive Open.. We can
1505 * only receive it Reject for Active Open...*/
1506 WARN_ON(1);
1507 }
1508 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1509 type = NES_CM_EVENT_MPA_REQ;
1510 atomic_set(&cm_node->passive_state,
1511 NES_PASSIVE_STATE_INDICATED);
1512 break;
1513 case NES_CM_STATE_MPAREQ_SENT:
1514 cleanup_retrans_entry(cm_node);
1515 if (res_type == NES_MPA_REQUEST_REJECT) {
1516 type = NES_CM_EVENT_MPA_REJECT;
1517 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1518 } else {
1519 type = NES_CM_EVENT_CONNECTED;
1520 cm_node->state = NES_CM_STATE_TSA;
1521 }
1522
1523 break;
1524 default:
1525 WARN_ON(1);
1526 break;
1527 }
1528 dev_kfree_skb_any(skb);
1529 create_event(cm_node, type);
1530 }
1531
1532 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1533 {
1534 switch (cm_node->state) {
1535 case NES_CM_STATE_SYN_SENT:
1536 case NES_CM_STATE_MPAREQ_SENT:
1537 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1538 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1539 cm_node->listener, cm_node->state);
1540 active_open_err(cm_node, skb, 1);
1541 break;
1542 case NES_CM_STATE_ESTABLISHED:
1543 case NES_CM_STATE_SYN_RCVD:
1544 passive_open_err(cm_node, skb, 1);
1545 break;
1546 case NES_CM_STATE_TSA:
1547 default:
1548 drop_packet(skb);
1549 }
1550 }
1551
1552 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1553 struct sk_buff *skb)
1554 {
1555 int err;
1556
1557 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1558 if (err)
1559 active_open_err(cm_node, skb, 1);
1560
1561 return err;
1562 }
1563
1564 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1565 struct sk_buff *skb)
1566 {
1567 int err = 0;
1568 u32 seq;
1569 u32 ack_seq;
1570 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1571 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1572 u32 rcv_wnd;
1573 seq = ntohl(tcph->seq);
1574 ack_seq = ntohl(tcph->ack_seq);
1575 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1576 if (ack_seq != loc_seq_num)
1577 err = 1;
1578 else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
1579 err = 1;
1580 if (err) {
1581 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1582 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1583 cm_node->listener, cm_node->state);
1584 indicate_pkt_err(cm_node, skb);
1585 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1586 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1587 rcv_wnd);
1588 }
1589 return err;
1590 }
1591
1592 /*
1593 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1594 * is created with a listener or it may comein as rexmitted packet which in
1595 * that case will be just dropped.
1596 */
1597
1598 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1599 struct tcphdr *tcph)
1600 {
1601 int ret;
1602 u32 inc_sequence;
1603 int optionsize;
1604
1605 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1606 skb_trim(skb, 0);
1607 inc_sequence = ntohl(tcph->seq);
1608
1609 switch (cm_node->state) {
1610 case NES_CM_STATE_SYN_SENT:
1611 case NES_CM_STATE_MPAREQ_SENT:
1612 /* Rcvd syn on active open connection*/
1613 active_open_err(cm_node, skb, 1);
1614 break;
1615 case NES_CM_STATE_LISTENING:
1616 /* Passive OPEN */
1617 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1618 cm_node->listener->backlog) {
1619 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1620 "pressure \n");
1621 cm_backlog_drops++;
1622 passive_open_err(cm_node, skb, 0);
1623 break;
1624 }
1625 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1626 1);
1627 if (ret) {
1628 passive_open_err(cm_node, skb, 0);
1629 /* drop pkt */
1630 break;
1631 }
1632 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1633 BUG_ON(cm_node->send_entry);
1634 cm_node->accept_pend = 1;
1635 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1636
1637 cm_node->state = NES_CM_STATE_SYN_RCVD;
1638 send_syn(cm_node, 1, skb);
1639 break;
1640 case NES_CM_STATE_CLOSED:
1641 cleanup_retrans_entry(cm_node);
1642 add_ref_cm_node(cm_node);
1643 send_reset(cm_node, skb);
1644 break;
1645 case NES_CM_STATE_TSA:
1646 case NES_CM_STATE_ESTABLISHED:
1647 case NES_CM_STATE_FIN_WAIT1:
1648 case NES_CM_STATE_FIN_WAIT2:
1649 case NES_CM_STATE_MPAREQ_RCVD:
1650 case NES_CM_STATE_LAST_ACK:
1651 case NES_CM_STATE_CLOSING:
1652 case NES_CM_STATE_UNKNOWN:
1653 default:
1654 drop_packet(skb);
1655 break;
1656 }
1657 }
1658
1659 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1660 struct tcphdr *tcph)
1661 {
1662
1663 int ret;
1664 u32 inc_sequence;
1665 int optionsize;
1666
1667 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1668 skb_trim(skb, 0);
1669 inc_sequence = ntohl(tcph->seq);
1670 switch (cm_node->state) {
1671 case NES_CM_STATE_SYN_SENT:
1672 cleanup_retrans_entry(cm_node);
1673 /* active open */
1674 if (check_syn(cm_node, tcph, skb))
1675 return;
1676 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1677 /* setup options */
1678 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1679 if (ret) {
1680 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1681 cm_node);
1682 break;
1683 }
1684 cleanup_retrans_entry(cm_node);
1685 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1686 send_mpa_request(cm_node, skb);
1687 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1688 break;
1689 case NES_CM_STATE_MPAREQ_RCVD:
1690 /* passive open, so should not be here */
1691 passive_open_err(cm_node, skb, 1);
1692 break;
1693 case NES_CM_STATE_LISTENING:
1694 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1695 cleanup_retrans_entry(cm_node);
1696 cm_node->state = NES_CM_STATE_CLOSED;
1697 send_reset(cm_node, skb);
1698 break;
1699 case NES_CM_STATE_CLOSED:
1700 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1701 cleanup_retrans_entry(cm_node);
1702 add_ref_cm_node(cm_node);
1703 send_reset(cm_node, skb);
1704 break;
1705 case NES_CM_STATE_ESTABLISHED:
1706 case NES_CM_STATE_FIN_WAIT1:
1707 case NES_CM_STATE_FIN_WAIT2:
1708 case NES_CM_STATE_LAST_ACK:
1709 case NES_CM_STATE_TSA:
1710 case NES_CM_STATE_CLOSING:
1711 case NES_CM_STATE_UNKNOWN:
1712 case NES_CM_STATE_MPAREQ_SENT:
1713 default:
1714 drop_packet(skb);
1715 break;
1716 }
1717 }
1718
1719 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1720 struct tcphdr *tcph)
1721 {
1722 int datasize = 0;
1723 u32 inc_sequence;
1724 int ret = 0;
1725 int optionsize;
1726 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1727
1728 if (check_seq(cm_node, tcph, skb))
1729 return -EINVAL;
1730
1731 skb_pull(skb, tcph->doff << 2);
1732 inc_sequence = ntohl(tcph->seq);
1733 datasize = skb->len;
1734 switch (cm_node->state) {
1735 case NES_CM_STATE_SYN_RCVD:
1736 /* Passive OPEN */
1737 cleanup_retrans_entry(cm_node);
1738 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1739 if (ret)
1740 break;
1741 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1742 cm_node->state = NES_CM_STATE_ESTABLISHED;
1743 if (datasize) {
1744 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1745 handle_rcv_mpa(cm_node, skb);
1746 } else /* rcvd ACK only */
1747 dev_kfree_skb_any(skb);
1748 break;
1749 case NES_CM_STATE_ESTABLISHED:
1750 /* Passive OPEN */
1751 cleanup_retrans_entry(cm_node);
1752 if (datasize) {
1753 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1754 handle_rcv_mpa(cm_node, skb);
1755 } else
1756 drop_packet(skb);
1757 break;
1758 case NES_CM_STATE_MPAREQ_SENT:
1759 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1760 if (datasize) {
1761 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1762 handle_rcv_mpa(cm_node, skb);
1763 } else /* Could be just an ack pkt.. */
1764 dev_kfree_skb_any(skb);
1765 break;
1766 case NES_CM_STATE_LISTENING:
1767 cleanup_retrans_entry(cm_node);
1768 cm_node->state = NES_CM_STATE_CLOSED;
1769 send_reset(cm_node, skb);
1770 break;
1771 case NES_CM_STATE_CLOSED:
1772 cleanup_retrans_entry(cm_node);
1773 add_ref_cm_node(cm_node);
1774 send_reset(cm_node, skb);
1775 break;
1776 case NES_CM_STATE_LAST_ACK:
1777 case NES_CM_STATE_CLOSING:
1778 cleanup_retrans_entry(cm_node);
1779 cm_node->state = NES_CM_STATE_CLOSED;
1780 cm_node->cm_id->rem_ref(cm_node->cm_id);
1781 rem_ref_cm_node(cm_node->cm_core, cm_node);
1782 drop_packet(skb);
1783 break;
1784 case NES_CM_STATE_FIN_WAIT1:
1785 cleanup_retrans_entry(cm_node);
1786 drop_packet(skb);
1787 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1788 break;
1789 case NES_CM_STATE_SYN_SENT:
1790 case NES_CM_STATE_FIN_WAIT2:
1791 case NES_CM_STATE_TSA:
1792 case NES_CM_STATE_MPAREQ_RCVD:
1793 case NES_CM_STATE_UNKNOWN:
1794 default:
1795 cleanup_retrans_entry(cm_node);
1796 drop_packet(skb);
1797 break;
1798 }
1799 return ret;
1800 }
1801
1802
1803
1804 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1805 struct sk_buff *skb, int optionsize, int passive)
1806 {
1807 u8 *optionsloc = (u8 *)&tcph[1];
1808 if (optionsize) {
1809 if (process_options(cm_node, optionsloc, optionsize,
1810 (u32)tcph->syn)) {
1811 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1812 __func__, cm_node);
1813 if (passive)
1814 passive_open_err(cm_node, skb, 1);
1815 else
1816 active_open_err(cm_node, skb, 1);
1817 return 1;
1818 }
1819 }
1820
1821 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1822 cm_node->tcp_cntxt.snd_wscale;
1823
1824 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1825 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1826 return 0;
1827 }
1828
1829 /*
1830 * active_open_err() will send reset() if flag set..
1831 * It will also send ABORT event.
1832 */
1833
1834 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1835 int reset)
1836 {
1837 cleanup_retrans_entry(cm_node);
1838 if (reset) {
1839 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1840 "state=%d\n", cm_node, cm_node->state);
1841 add_ref_cm_node(cm_node);
1842 send_reset(cm_node, skb);
1843 } else
1844 dev_kfree_skb_any(skb);
1845
1846 cm_node->state = NES_CM_STATE_CLOSED;
1847 create_event(cm_node, NES_CM_EVENT_ABORTED);
1848 }
1849
1850 /*
1851 * passive_open_err() will either do a reset() or will free up the skb and
1852 * remove the cm_node.
1853 */
1854
1855 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1856 int reset)
1857 {
1858 cleanup_retrans_entry(cm_node);
1859 cm_node->state = NES_CM_STATE_CLOSED;
1860 if (reset) {
1861 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1862 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1863 send_reset(cm_node, skb);
1864 } else {
1865 dev_kfree_skb_any(skb);
1866 rem_ref_cm_node(cm_node->cm_core, cm_node);
1867 }
1868 }
1869
1870 /*
1871 * free_retrans_entry() routines assumes that the retrans_list_lock has
1872 * been acquired before calling.
1873 */
1874 static void free_retrans_entry(struct nes_cm_node *cm_node)
1875 {
1876 struct nes_timer_entry *send_entry;
1877 send_entry = cm_node->send_entry;
1878 if (send_entry) {
1879 cm_node->send_entry = NULL;
1880 dev_kfree_skb_any(send_entry->skb);
1881 kfree(send_entry);
1882 rem_ref_cm_node(cm_node->cm_core, cm_node);
1883 }
1884 }
1885
1886 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1887 {
1888 unsigned long flags;
1889
1890 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1891 free_retrans_entry(cm_node);
1892 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1893 }
1894
1895 /**
1896 * process_packet
1897 * Returns skb if to be freed, else it will return NULL if already used..
1898 */
1899 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1900 struct nes_cm_core *cm_core)
1901 {
1902 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1903 struct tcphdr *tcph = tcp_hdr(skb);
1904 u32 fin_set = 0;
1905 int ret = 0;
1906 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1907
1908 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1909 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1910 tcph->ack, tcph->rst, tcph->fin);
1911
1912 if (tcph->rst)
1913 pkt_type = NES_PKT_TYPE_RST;
1914 else if (tcph->syn) {
1915 pkt_type = NES_PKT_TYPE_SYN;
1916 if (tcph->ack)
1917 pkt_type = NES_PKT_TYPE_SYNACK;
1918 } else if (tcph->ack)
1919 pkt_type = NES_PKT_TYPE_ACK;
1920 if (tcph->fin)
1921 fin_set = 1;
1922
1923 switch (pkt_type) {
1924 case NES_PKT_TYPE_SYN:
1925 handle_syn_pkt(cm_node, skb, tcph);
1926 break;
1927 case NES_PKT_TYPE_SYNACK:
1928 handle_synack_pkt(cm_node, skb, tcph);
1929 break;
1930 case NES_PKT_TYPE_ACK:
1931 ret = handle_ack_pkt(cm_node, skb, tcph);
1932 if (fin_set && !ret)
1933 handle_fin_pkt(cm_node);
1934 break;
1935 case NES_PKT_TYPE_RST:
1936 handle_rst_pkt(cm_node, skb, tcph);
1937 break;
1938 default:
1939 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
1940 handle_fin_pkt(cm_node);
1941 drop_packet(skb);
1942 break;
1943 }
1944 }
1945
1946 /**
1947 * mini_cm_listen - create a listen node with params
1948 */
1949 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1950 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1951 {
1952 struct nes_cm_listener *listener;
1953 unsigned long flags;
1954
1955 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1956 cm_info->loc_addr, cm_info->loc_port);
1957
1958 /* cannot have multiple matching listeners */
1959 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1960 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1961 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1962 /* find automatically incs ref count ??? */
1963 atomic_dec(&listener->ref_count);
1964 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1965 return NULL;
1966 }
1967
1968 if (!listener) {
1969 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1970 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1971 if (!listener) {
1972 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1973 return NULL;
1974 }
1975
1976 listener->loc_addr = htonl(cm_info->loc_addr);
1977 listener->loc_port = htons(cm_info->loc_port);
1978 listener->reused_node = 0;
1979
1980 atomic_set(&listener->ref_count, 1);
1981 }
1982 /* pasive case */
1983 /* find already inc'ed the ref count */
1984 else {
1985 listener->reused_node = 1;
1986 }
1987
1988 listener->cm_id = cm_info->cm_id;
1989 atomic_set(&listener->pend_accepts_cnt, 0);
1990 listener->cm_core = cm_core;
1991 listener->nesvnic = nesvnic;
1992 atomic_inc(&cm_core->node_cnt);
1993
1994 listener->conn_type = cm_info->conn_type;
1995 listener->backlog = cm_info->backlog;
1996 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1997
1998 if (!listener->reused_node) {
1999 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2000 list_add(&listener->list, &cm_core->listen_list.list);
2001 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2002 atomic_inc(&cm_core->listen_node_cnt);
2003 }
2004
2005 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2006 " listener = %p, backlog = %d, cm_id = %p.\n",
2007 cm_info->loc_addr, cm_info->loc_port,
2008 listener, listener->backlog, listener->cm_id);
2009
2010 return listener;
2011 }
2012
2013
2014 /**
2015 * mini_cm_connect - make a connection node with params
2016 */
2017 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2018 struct nes_vnic *nesvnic, u16 private_data_len,
2019 void *private_data, struct nes_cm_info *cm_info)
2020 {
2021 int ret = 0;
2022 struct nes_cm_node *cm_node;
2023 struct nes_cm_listener *loopbackremotelistener;
2024 struct nes_cm_node *loopbackremotenode;
2025 struct nes_cm_info loopback_cm_info;
2026 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
2027 struct ietf_mpa_frame *mpa_frame = NULL;
2028
2029 /* create a CM connection node */
2030 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2031 if (!cm_node)
2032 return NULL;
2033 mpa_frame = &cm_node->mpa_frame;
2034 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
2035 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2036 mpa_frame->rev = IETF_MPA_VERSION;
2037 mpa_frame->priv_data_len = htons(private_data_len);
2038
2039 /* set our node side to client (active) side */
2040 cm_node->tcp_cntxt.client = 1;
2041 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2042
2043 if (cm_info->loc_addr == cm_info->rem_addr) {
2044 loopbackremotelistener = find_listener(cm_core,
2045 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2046 NES_CM_LISTENER_ACTIVE_STATE);
2047 if (loopbackremotelistener == NULL) {
2048 create_event(cm_node, NES_CM_EVENT_ABORTED);
2049 } else {
2050 loopback_cm_info = *cm_info;
2051 loopback_cm_info.loc_port = cm_info->rem_port;
2052 loopback_cm_info.rem_port = cm_info->loc_port;
2053 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2054 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2055 &loopback_cm_info, loopbackremotelistener);
2056 if (!loopbackremotenode) {
2057 rem_ref_cm_node(cm_node->cm_core, cm_node);
2058 return NULL;
2059 }
2060 atomic_inc(&cm_loopbacks);
2061 loopbackremotenode->loopbackpartner = cm_node;
2062 loopbackremotenode->tcp_cntxt.rcv_wscale =
2063 NES_CM_DEFAULT_RCV_WND_SCALE;
2064 cm_node->loopbackpartner = loopbackremotenode;
2065 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2066 private_data_len);
2067 loopbackremotenode->mpa_frame_size = private_data_len;
2068
2069 /* we are done handling this state. */
2070 /* set node to a TSA state */
2071 cm_node->state = NES_CM_STATE_TSA;
2072 cm_node->tcp_cntxt.rcv_nxt =
2073 loopbackremotenode->tcp_cntxt.loc_seq_num;
2074 loopbackremotenode->tcp_cntxt.rcv_nxt =
2075 cm_node->tcp_cntxt.loc_seq_num;
2076 cm_node->tcp_cntxt.max_snd_wnd =
2077 loopbackremotenode->tcp_cntxt.rcv_wnd;
2078 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2079 cm_node->tcp_cntxt.rcv_wnd;
2080 cm_node->tcp_cntxt.snd_wnd =
2081 loopbackremotenode->tcp_cntxt.rcv_wnd;
2082 loopbackremotenode->tcp_cntxt.snd_wnd =
2083 cm_node->tcp_cntxt.rcv_wnd;
2084 cm_node->tcp_cntxt.snd_wscale =
2085 loopbackremotenode->tcp_cntxt.rcv_wscale;
2086 loopbackremotenode->tcp_cntxt.snd_wscale =
2087 cm_node->tcp_cntxt.rcv_wscale;
2088 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2089 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2090 }
2091 return cm_node;
2092 }
2093
2094 /* set our node side to client (active) side */
2095 cm_node->tcp_cntxt.client = 1;
2096 /* init our MPA frame ptr */
2097 memcpy(mpa_frame->priv_data, private_data, private_data_len);
2098
2099 cm_node->mpa_frame_size = mpa_frame_size;
2100
2101 /* send a syn and goto syn sent state */
2102 cm_node->state = NES_CM_STATE_SYN_SENT;
2103 ret = send_syn(cm_node, 0, NULL);
2104
2105 if (ret) {
2106 /* error in sending the syn free up the cm_node struct */
2107 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2108 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2109 cm_node->rem_addr, cm_node->rem_port, cm_node,
2110 cm_node->cm_id);
2111 rem_ref_cm_node(cm_node->cm_core, cm_node);
2112 cm_node = NULL;
2113 }
2114
2115 if (cm_node)
2116 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2117 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2118 cm_node->rem_addr, cm_node->rem_port, cm_node,
2119 cm_node->cm_id);
2120
2121 return cm_node;
2122 }
2123
2124
2125 /**
2126 * mini_cm_accept - accept a connection
2127 * This function is never called
2128 */
2129 static int mini_cm_accept(struct nes_cm_core *cm_core,
2130 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2131 {
2132 return 0;
2133 }
2134
2135
2136 /**
2137 * mini_cm_reject - reject and teardown a connection
2138 */
2139 static int mini_cm_reject(struct nes_cm_core *cm_core,
2140 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2141 {
2142 int ret = 0;
2143 int err = 0;
2144 int passive_state;
2145 struct nes_cm_event event;
2146 struct iw_cm_id *cm_id = cm_node->cm_id;
2147 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2148
2149 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2150 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2151
2152 if (cm_node->tcp_cntxt.client)
2153 return ret;
2154 cleanup_retrans_entry(cm_node);
2155
2156 if (!loopback) {
2157 passive_state = atomic_add_return(1, &cm_node->passive_state);
2158 if (passive_state == NES_SEND_RESET_EVENT) {
2159 cm_node->state = NES_CM_STATE_CLOSED;
2160 rem_ref_cm_node(cm_core, cm_node);
2161 } else {
2162 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2163 rem_ref_cm_node(cm_core, cm_node);
2164 } else {
2165 ret = send_mpa_reject(cm_node);
2166 if (ret) {
2167 cm_node->state = NES_CM_STATE_CLOSED;
2168 err = send_reset(cm_node, NULL);
2169 if (err)
2170 WARN_ON(1);
2171 } else
2172 cm_id->add_ref(cm_id);
2173 }
2174 }
2175 } else {
2176 cm_node->cm_id = NULL;
2177 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2178 rem_ref_cm_node(cm_core, cm_node);
2179 rem_ref_cm_node(cm_core, loopback);
2180 } else {
2181 event.cm_node = loopback;
2182 event.cm_info.rem_addr = loopback->rem_addr;
2183 event.cm_info.loc_addr = loopback->loc_addr;
2184 event.cm_info.rem_port = loopback->rem_port;
2185 event.cm_info.loc_port = loopback->loc_port;
2186 event.cm_info.cm_id = loopback->cm_id;
2187 cm_event_mpa_reject(&event);
2188 rem_ref_cm_node(cm_core, cm_node);
2189 loopback->state = NES_CM_STATE_CLOSING;
2190
2191 cm_id = loopback->cm_id;
2192 rem_ref_cm_node(cm_core, loopback);
2193 cm_id->rem_ref(cm_id);
2194 }
2195 }
2196
2197 return ret;
2198 }
2199
2200
2201 /**
2202 * mini_cm_close
2203 */
2204 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2205 {
2206 int ret = 0;
2207
2208 if (!cm_core || !cm_node)
2209 return -EINVAL;
2210
2211 switch (cm_node->state) {
2212 case NES_CM_STATE_SYN_RCVD:
2213 case NES_CM_STATE_SYN_SENT:
2214 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2215 case NES_CM_STATE_ESTABLISHED:
2216 case NES_CM_STATE_ACCEPTING:
2217 case NES_CM_STATE_MPAREQ_SENT:
2218 case NES_CM_STATE_MPAREQ_RCVD:
2219 cleanup_retrans_entry(cm_node);
2220 send_reset(cm_node, NULL);
2221 break;
2222 case NES_CM_STATE_CLOSE_WAIT:
2223 cm_node->state = NES_CM_STATE_LAST_ACK;
2224 send_fin(cm_node, NULL);
2225 break;
2226 case NES_CM_STATE_FIN_WAIT1:
2227 case NES_CM_STATE_FIN_WAIT2:
2228 case NES_CM_STATE_LAST_ACK:
2229 case NES_CM_STATE_TIME_WAIT:
2230 case NES_CM_STATE_CLOSING:
2231 ret = -1;
2232 break;
2233 case NES_CM_STATE_LISTENING:
2234 cleanup_retrans_entry(cm_node);
2235 send_reset(cm_node, NULL);
2236 break;
2237 case NES_CM_STATE_MPAREJ_RCVD:
2238 case NES_CM_STATE_UNKNOWN:
2239 case NES_CM_STATE_INITED:
2240 case NES_CM_STATE_CLOSED:
2241 case NES_CM_STATE_LISTENER_DESTROYED:
2242 ret = rem_ref_cm_node(cm_core, cm_node);
2243 break;
2244 case NES_CM_STATE_TSA:
2245 if (cm_node->send_entry)
2246 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2247 "send_entry=%p\n", cm_node->send_entry);
2248 ret = rem_ref_cm_node(cm_core, cm_node);
2249 break;
2250 }
2251 return ret;
2252 }
2253
2254
2255 /**
2256 * recv_pkt - recv an ETHERNET packet, and process it through CM
2257 * node state machine
2258 */
2259 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2260 struct nes_vnic *nesvnic, struct sk_buff *skb)
2261 {
2262 struct nes_cm_node *cm_node = NULL;
2263 struct nes_cm_listener *listener = NULL;
2264 struct iphdr *iph;
2265 struct tcphdr *tcph;
2266 struct nes_cm_info nfo;
2267 int skb_handled = 1;
2268 __be32 tmp_daddr, tmp_saddr;
2269
2270 if (!skb)
2271 return 0;
2272 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2273 return 0;
2274 }
2275
2276 iph = (struct iphdr *)skb->data;
2277 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2278
2279 nfo.loc_addr = ntohl(iph->daddr);
2280 nfo.loc_port = ntohs(tcph->dest);
2281 nfo.rem_addr = ntohl(iph->saddr);
2282 nfo.rem_port = ntohs(tcph->source);
2283
2284 tmp_daddr = cpu_to_be32(iph->daddr);
2285 tmp_saddr = cpu_to_be32(iph->saddr);
2286
2287 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2288 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2289
2290 do {
2291 cm_node = find_node(cm_core,
2292 nfo.rem_port, nfo.rem_addr,
2293 nfo.loc_port, nfo.loc_addr);
2294
2295 if (!cm_node) {
2296 /* Only type of packet accepted are for */
2297 /* the PASSIVE open (syn only) */
2298 if ((!tcph->syn) || (tcph->ack)) {
2299 skb_handled = 0;
2300 break;
2301 }
2302 listener = find_listener(cm_core, nfo.loc_addr,
2303 nfo.loc_port,
2304 NES_CM_LISTENER_ACTIVE_STATE);
2305 if (!listener) {
2306 nfo.cm_id = NULL;
2307 nfo.conn_type = 0;
2308 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2309 skb_handled = 0;
2310 break;
2311 }
2312 nfo.cm_id = listener->cm_id;
2313 nfo.conn_type = listener->conn_type;
2314 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2315 listener);
2316 if (!cm_node) {
2317 nes_debug(NES_DBG_CM, "Unable to allocate "
2318 "node\n");
2319 cm_packets_dropped++;
2320 atomic_dec(&listener->ref_count);
2321 dev_kfree_skb_any(skb);
2322 break;
2323 }
2324 if (!tcph->rst && !tcph->fin) {
2325 cm_node->state = NES_CM_STATE_LISTENING;
2326 } else {
2327 cm_packets_dropped++;
2328 rem_ref_cm_node(cm_core, cm_node);
2329 dev_kfree_skb_any(skb);
2330 break;
2331 }
2332 add_ref_cm_node(cm_node);
2333 } else if (cm_node->state == NES_CM_STATE_TSA) {
2334 rem_ref_cm_node(cm_core, cm_node);
2335 atomic_inc(&cm_accel_dropped_pkts);
2336 dev_kfree_skb_any(skb);
2337 break;
2338 }
2339 skb_reset_network_header(skb);
2340 skb_set_transport_header(skb, sizeof(*tcph));
2341 skb->len = ntohs(iph->tot_len);
2342 process_packet(cm_node, skb, cm_core);
2343 rem_ref_cm_node(cm_core, cm_node);
2344 } while (0);
2345 return skb_handled;
2346 }
2347
2348
2349 /**
2350 * nes_cm_alloc_core - allocate a top level instance of a cm core
2351 */
2352 static struct nes_cm_core *nes_cm_alloc_core(void)
2353 {
2354 struct nes_cm_core *cm_core;
2355
2356 /* setup the CM core */
2357 /* alloc top level core control structure */
2358 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2359 if (!cm_core)
2360 return NULL;
2361
2362 INIT_LIST_HEAD(&cm_core->connected_nodes);
2363 init_timer(&cm_core->tcp_timer);
2364 cm_core->tcp_timer.function = nes_cm_timer_tick;
2365
2366 cm_core->mtu = NES_CM_DEFAULT_MTU;
2367 cm_core->state = NES_CM_STATE_INITED;
2368 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2369
2370 atomic_set(&cm_core->events_posted, 0);
2371
2372 cm_core->api = &nes_cm_api;
2373
2374 spin_lock_init(&cm_core->ht_lock);
2375 spin_lock_init(&cm_core->listen_list_lock);
2376
2377 INIT_LIST_HEAD(&cm_core->listen_list.list);
2378
2379 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2380
2381 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2382 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2383 cm_core->post_event = nes_cm_post_event;
2384 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2385 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2386
2387 print_core(cm_core);
2388 return cm_core;
2389 }
2390
2391
2392 /**
2393 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2394 */
2395 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2396 {
2397 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2398
2399 if (!cm_core)
2400 return -EINVAL;
2401
2402 barrier();
2403
2404 if (timer_pending(&cm_core->tcp_timer)) {
2405 del_timer(&cm_core->tcp_timer);
2406 }
2407
2408 destroy_workqueue(cm_core->event_wq);
2409 destroy_workqueue(cm_core->disconn_wq);
2410 nes_debug(NES_DBG_CM, "\n");
2411 kfree(cm_core);
2412
2413 return 0;
2414 }
2415
2416
2417 /**
2418 * mini_cm_get
2419 */
2420 static int mini_cm_get(struct nes_cm_core *cm_core)
2421 {
2422 return cm_core->state;
2423 }
2424
2425
2426 /**
2427 * mini_cm_set
2428 */
2429 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2430 {
2431 int ret = 0;
2432
2433 switch (type) {
2434 case NES_CM_SET_PKT_SIZE:
2435 cm_core->mtu = value;
2436 break;
2437 case NES_CM_SET_FREE_PKT_Q_SIZE:
2438 cm_core->free_tx_pkt_max = value;
2439 break;
2440 default:
2441 /* unknown set option */
2442 ret = -EINVAL;
2443 }
2444
2445 return ret;
2446 }
2447
2448
2449 /**
2450 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2451 * successfully exchanged when this is called
2452 */
2453 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2454 {
2455 int ret = 0;
2456
2457 if (!nesqp)
2458 return -EINVAL;
2459
2460 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2461 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2462 NES_QPCONTEXT_MISC_DROS);
2463
2464 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2465 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2466
2467 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2468
2469 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2470
2471 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2472 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2473
2474 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2475 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2476 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2477
2478 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2479 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2480 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2481
2482 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2483 nesqp->nesqp_context->ts_recent = 0;
2484 nesqp->nesqp_context->ts_age = 0;
2485 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2486 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2487 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2488 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2489 cm_node->tcp_cntxt.rcv_wscale);
2490 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2491 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2492 nesqp->nesqp_context->srtt = 0;
2493 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2494 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2495 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2496 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2497 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2498 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2499
2500 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2501 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2502 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2503 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2504 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2505 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2506 le32_to_cpu(nesqp->nesqp_context->misc));
2507 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2508 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2509 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2510
2511 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2512 cm_node->state = NES_CM_STATE_TSA;
2513
2514 return ret;
2515 }
2516
2517
2518 /**
2519 * nes_cm_disconn
2520 */
2521 int nes_cm_disconn(struct nes_qp *nesqp)
2522 {
2523 struct disconn_work *work;
2524
2525 work = kzalloc(sizeof *work, GFP_ATOMIC);
2526 if (!work)
2527 return -ENOMEM; /* Timer will clean up */
2528
2529 nes_add_ref(&nesqp->ibqp);
2530 work->nesqp = nesqp;
2531 INIT_WORK(&work->work, nes_disconnect_worker);
2532 queue_work(g_cm_core->disconn_wq, &work->work);
2533 return 0;
2534 }
2535
2536
2537 /**
2538 * nes_disconnect_worker
2539 */
2540 static void nes_disconnect_worker(struct work_struct *work)
2541 {
2542 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2543 struct nes_qp *nesqp = dwork->nesqp;
2544
2545 kfree(dwork);
2546 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2547 nesqp->last_aeq, nesqp->hwqp.qp_id);
2548 nes_cm_disconn_true(nesqp);
2549 nes_rem_ref(&nesqp->ibqp);
2550 }
2551
2552
2553 /**
2554 * nes_cm_disconn_true
2555 */
2556 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2557 {
2558 unsigned long flags;
2559 int ret = 0;
2560 struct iw_cm_id *cm_id;
2561 struct iw_cm_event cm_event;
2562 struct nes_vnic *nesvnic;
2563 u16 last_ae;
2564 u8 original_hw_tcp_state;
2565 u8 original_ibqp_state;
2566 int disconn_status = 0;
2567 int issue_disconn = 0;
2568 int issue_close = 0;
2569 int issue_flush = 0;
2570 u32 flush_q = NES_CQP_FLUSH_RQ;
2571 struct ib_event ibevent;
2572
2573 if (!nesqp) {
2574 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2575 return -1;
2576 }
2577
2578 spin_lock_irqsave(&nesqp->lock, flags);
2579 cm_id = nesqp->cm_id;
2580 /* make sure we havent already closed this connection */
2581 if (!cm_id) {
2582 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2583 nesqp->hwqp.qp_id);
2584 spin_unlock_irqrestore(&nesqp->lock, flags);
2585 return -1;
2586 }
2587
2588 nesvnic = to_nesvnic(nesqp->ibqp.device);
2589 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2590
2591 original_hw_tcp_state = nesqp->hw_tcp_state;
2592 original_ibqp_state = nesqp->ibqp_state;
2593 last_ae = nesqp->last_aeq;
2594
2595 if (nesqp->term_flags) {
2596 issue_disconn = 1;
2597 issue_close = 1;
2598 nesqp->cm_id = NULL;
2599 if (nesqp->flush_issued == 0) {
2600 nesqp->flush_issued = 1;
2601 issue_flush = 1;
2602 }
2603 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2604 ((original_ibqp_state == IB_QPS_RTS) &&
2605 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2606 issue_disconn = 1;
2607 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2608 disconn_status = -ECONNRESET;
2609 }
2610
2611 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2612 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2613 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2614 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2615 issue_close = 1;
2616 nesqp->cm_id = NULL;
2617 if (nesqp->flush_issued == 0) {
2618 nesqp->flush_issued = 1;
2619 issue_flush = 1;
2620 }
2621 }
2622
2623 spin_unlock_irqrestore(&nesqp->lock, flags);
2624
2625 if ((issue_flush) && (nesqp->destroyed == 0)) {
2626 /* Flush the queue(s) */
2627 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2628 flush_q |= NES_CQP_FLUSH_SQ;
2629 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2630
2631 if (nesqp->term_flags) {
2632 ibevent.device = nesqp->ibqp.device;
2633 ibevent.event = nesqp->terminate_eventtype;
2634 ibevent.element.qp = &nesqp->ibqp;
2635 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2636 }
2637 }
2638
2639 if ((cm_id) && (cm_id->event_handler)) {
2640 if (issue_disconn) {
2641 atomic_inc(&cm_disconnects);
2642 cm_event.event = IW_CM_EVENT_DISCONNECT;
2643 cm_event.status = disconn_status;
2644 cm_event.local_addr = cm_id->local_addr;
2645 cm_event.remote_addr = cm_id->remote_addr;
2646 cm_event.private_data = NULL;
2647 cm_event.private_data_len = 0;
2648
2649 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2650 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2651 "cm_id = %p, refcount = %u.\n",
2652 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2653 nesqp->hwqp.sq_tail, cm_id,
2654 atomic_read(&nesqp->refcount));
2655
2656 ret = cm_id->event_handler(cm_id, &cm_event);
2657 if (ret)
2658 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2659 "returned, ret=%d\n", ret);
2660 }
2661
2662 if (issue_close) {
2663 atomic_inc(&cm_closes);
2664 nes_disconnect(nesqp, 1);
2665
2666 cm_id->provider_data = nesqp;
2667 /* Send up the close complete event */
2668 cm_event.event = IW_CM_EVENT_CLOSE;
2669 cm_event.status = 0;
2670 cm_event.provider_data = cm_id->provider_data;
2671 cm_event.local_addr = cm_id->local_addr;
2672 cm_event.remote_addr = cm_id->remote_addr;
2673 cm_event.private_data = NULL;
2674 cm_event.private_data_len = 0;
2675
2676 ret = cm_id->event_handler(cm_id, &cm_event);
2677 if (ret) {
2678 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2679 }
2680
2681 cm_id->rem_ref(cm_id);
2682 }
2683 }
2684
2685 return 0;
2686 }
2687
2688
2689 /**
2690 * nes_disconnect
2691 */
2692 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2693 {
2694 int ret = 0;
2695 struct nes_vnic *nesvnic;
2696 struct nes_device *nesdev;
2697 struct nes_ib_device *nesibdev;
2698
2699 nesvnic = to_nesvnic(nesqp->ibqp.device);
2700 if (!nesvnic)
2701 return -EINVAL;
2702
2703 nesdev = nesvnic->nesdev;
2704 nesibdev = nesvnic->nesibdev;
2705
2706 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2707 netdev_refcnt_read(nesvnic->netdev));
2708
2709 if (nesqp->active_conn) {
2710
2711 /* indicate this connection is NOT active */
2712 nesqp->active_conn = 0;
2713 } else {
2714 /* Need to free the Last Streaming Mode Message */
2715 if (nesqp->ietf_frame) {
2716 if (nesqp->lsmm_mr)
2717 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2718 pci_free_consistent(nesdev->pcidev,
2719 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2720 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2721 }
2722 }
2723
2724 /* close the CM node down if it is still active */
2725 if (nesqp->cm_node) {
2726 nes_debug(NES_DBG_CM, "Call close API\n");
2727
2728 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2729 }
2730
2731 return ret;
2732 }
2733
2734
2735 /**
2736 * nes_accept
2737 */
2738 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2739 {
2740 u64 u64temp;
2741 struct ib_qp *ibqp;
2742 struct nes_qp *nesqp;
2743 struct nes_vnic *nesvnic;
2744 struct nes_device *nesdev;
2745 struct nes_cm_node *cm_node;
2746 struct nes_adapter *adapter;
2747 struct ib_qp_attr attr;
2748 struct iw_cm_event cm_event;
2749 struct nes_hw_qp_wqe *wqe;
2750 struct nes_v4_quad nes_quad;
2751 u32 crc_value;
2752 int ret;
2753 int passive_state;
2754 struct nes_ib_device *nesibdev;
2755 struct ib_mr *ibmr = NULL;
2756 struct ib_phys_buf ibphysbuf;
2757 struct nes_pd *nespd;
2758 u64 tagged_offset;
2759
2760 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2761 if (!ibqp)
2762 return -EINVAL;
2763
2764 /* get all our handles */
2765 nesqp = to_nesqp(ibqp);
2766 nesvnic = to_nesvnic(nesqp->ibqp.device);
2767 nesdev = nesvnic->nesdev;
2768 adapter = nesdev->nesadapter;
2769
2770 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2771 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2772 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2773 nesvnic->netdev->name);
2774
2775 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
2776 if (cm_node->loopbackpartner)
2777 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
2778 rem_ref_cm_node(cm_node->cm_core, cm_node);
2779 return -EINVAL;
2780 }
2781
2782 passive_state = atomic_add_return(1, &cm_node->passive_state);
2783 if (passive_state == NES_SEND_RESET_EVENT) {
2784 rem_ref_cm_node(cm_node->cm_core, cm_node);
2785 return -ECONNRESET;
2786 }
2787
2788 /* associate the node with the QP */
2789 nesqp->cm_node = (void *)cm_node;
2790 cm_node->nesqp = nesqp;
2791
2792 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2793 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2794 atomic_inc(&cm_accepts);
2795
2796 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2797 netdev_refcnt_read(nesvnic->netdev));
2798
2799 /* allocate the ietf frame and space for private data */
2800 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2801 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2802 &nesqp->ietf_frame_pbase);
2803
2804 if (!nesqp->ietf_frame) {
2805 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2806 "data\n");
2807 return -ENOMEM;
2808 }
2809
2810
2811 /* setup the MPA frame */
2812 nesqp->private_data_len = conn_param->private_data_len;
2813 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2814
2815 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2816 conn_param->private_data_len);
2817
2818 nesqp->ietf_frame->priv_data_len =
2819 cpu_to_be16(conn_param->private_data_len);
2820 nesqp->ietf_frame->rev = mpa_version;
2821 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2822
2823 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2824 wqe = &nesqp->hwqp.sq_vbase[0];
2825
2826 if (cm_id->remote_addr.sin_addr.s_addr !=
2827 cm_id->local_addr.sin_addr.s_addr) {
2828 u64temp = (unsigned long)nesqp;
2829 nesibdev = nesvnic->nesibdev;
2830 nespd = nesqp->nespd;
2831 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2832 ibphysbuf.size = conn_param->private_data_len +
2833 sizeof(struct ietf_mpa_frame);
2834 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
2835 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2836 &ibphysbuf, 1,
2837 IB_ACCESS_LOCAL_WRITE,
2838 &tagged_offset);
2839 if (!ibmr) {
2840 nes_debug(NES_DBG_CM, "Unable to register memory region"
2841 "for lSMM for cm_node = %p \n",
2842 cm_node);
2843 pci_free_consistent(nesdev->pcidev,
2844 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2845 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2846 return -ENOMEM;
2847 }
2848
2849 ibmr->pd = &nespd->ibpd;
2850 ibmr->device = nespd->ibpd.device;
2851 nesqp->lsmm_mr = ibmr;
2852
2853 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2854 set_wqe_64bit_value(wqe->wqe_words,
2855 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2856 u64temp);
2857 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2858 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2859 NES_IWARP_SQ_WQE_WRPDU);
2860 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2861 cpu_to_le32(conn_param->private_data_len +
2862 sizeof(struct ietf_mpa_frame));
2863 set_wqe_64bit_value(wqe->wqe_words,
2864 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
2865 (u64)(unsigned long)nesqp->ietf_frame);
2866 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2867 cpu_to_le32(conn_param->private_data_len +
2868 sizeof(struct ietf_mpa_frame));
2869 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
2870 if (nesqp->sq_kmapped) {
2871 nesqp->sq_kmapped = 0;
2872 kunmap(nesqp->page);
2873 }
2874
2875 nesqp->nesqp_context->ird_ord_sizes |=
2876 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2877 NES_QPCONTEXT_ORDIRD_WRPDU);
2878 } else {
2879 nesqp->nesqp_context->ird_ord_sizes |=
2880 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
2881 }
2882 nesqp->skip_lsmm = 1;
2883
2884
2885 /* Cache the cm_id in the qp */
2886 nesqp->cm_id = cm_id;
2887 cm_node->cm_id = cm_id;
2888
2889 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2890 cm_id->provider_data = nesqp;
2891 nesqp->active_conn = 0;
2892
2893 if (cm_node->state == NES_CM_STATE_TSA)
2894 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2895 cm_node);
2896
2897 nes_cm_init_tsa_conn(nesqp, cm_node);
2898
2899 nesqp->nesqp_context->tcpPorts[0] =
2900 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2901 nesqp->nesqp_context->tcpPorts[1] =
2902 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2903
2904 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2905 nesqp->nesqp_context->ip0 =
2906 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2907 else
2908 nesqp->nesqp_context->ip0 =
2909 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2910
2911 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2912 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2913 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2914
2915 nesqp->nesqp_context->arp_index_vlan |=
2916 cpu_to_le32(nes_arp_table(nesdev,
2917 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2918 NES_ARP_RESOLVE) << 16);
2919
2920 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2921 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2922
2923 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2924
2925 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2926 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2927 nesqp->nesqp_context->ird_ord_sizes |=
2928 cpu_to_le32((u32)conn_param->ord);
2929
2930 memset(&nes_quad, 0, sizeof(nes_quad));
2931 nes_quad.DstIpAdrIndex =
2932 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2933 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2934 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2935 else
2936 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2937 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2938 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2939
2940 /* Produce hash key */
2941 crc_value = get_crc_value(&nes_quad);
2942 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2943 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2944 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2945
2946 nesqp->hte_index &= adapter->hte_index_mask;
2947 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2948
2949 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2950
2951 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2952 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2953 "private data length=%zu.\n", nesqp->hwqp.qp_id,
2954 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2955 ntohs(cm_id->remote_addr.sin_port),
2956 ntohl(cm_id->local_addr.sin_addr.s_addr),
2957 ntohs(cm_id->local_addr.sin_port),
2958 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2959 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2960 conn_param->private_data_len +
2961 sizeof(struct ietf_mpa_frame));
2962
2963
2964 /* notify OF layer that accept event was successful */
2965 cm_id->add_ref(cm_id);
2966 nes_add_ref(&nesqp->ibqp);
2967
2968 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2969 cm_event.status = 0;
2970 cm_event.provider_data = (void *)nesqp;
2971 cm_event.local_addr = cm_id->local_addr;
2972 cm_event.remote_addr = cm_id->remote_addr;
2973 cm_event.private_data = NULL;
2974 cm_event.private_data_len = 0;
2975 ret = cm_id->event_handler(cm_id, &cm_event);
2976 attr.qp_state = IB_QPS_RTS;
2977 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2978 if (cm_node->loopbackpartner) {
2979 cm_node->loopbackpartner->mpa_frame_size =
2980 nesqp->private_data_len;
2981 /* copy entire MPA frame to our cm_node's frame */
2982 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2983 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2984 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2985 }
2986 if (ret)
2987 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2988 "ret=%d\n", __func__, __LINE__, ret);
2989
2990 return 0;
2991 }
2992
2993
2994 /**
2995 * nes_reject
2996 */
2997 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2998 {
2999 struct nes_cm_node *cm_node;
3000 struct nes_cm_node *loopback;
3001
3002 struct nes_cm_core *cm_core;
3003
3004 atomic_inc(&cm_rejects);
3005 cm_node = (struct nes_cm_node *) cm_id->provider_data;
3006 loopback = cm_node->loopbackpartner;
3007 cm_core = cm_node->cm_core;
3008 cm_node->cm_id = cm_id;
3009 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
3010
3011 if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
3012 return -EINVAL;
3013
3014 memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
3015 if (loopback) {
3016 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3017 loopback->mpa_frame.priv_data_len = pdata_len;
3018 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
3019 pdata_len;
3020 } else {
3021 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
3022 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
3023 }
3024
3025 cm_node->mpa_frame.rev = mpa_version;
3026 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
3027
3028 return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
3029 }
3030
3031
3032 /**
3033 * nes_connect
3034 * setup and launch cm connect node
3035 */
3036 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3037 {
3038 struct ib_qp *ibqp;
3039 struct nes_qp *nesqp;
3040 struct nes_vnic *nesvnic;
3041 struct nes_device *nesdev;
3042 struct nes_cm_node *cm_node;
3043 struct nes_cm_info cm_info;
3044 int apbvt_set = 0;
3045
3046 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3047 if (!ibqp)
3048 return -EINVAL;
3049 nesqp = to_nesqp(ibqp);
3050 if (!nesqp)
3051 return -EINVAL;
3052 nesvnic = to_nesvnic(nesqp->ibqp.device);
3053 if (!nesvnic)
3054 return -EINVAL;
3055 nesdev = nesvnic->nesdev;
3056 if (!nesdev)
3057 return -EINVAL;
3058
3059 if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3060 return -EINVAL;
3061
3062 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3063 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3064 ntohl(nesvnic->local_ipaddr),
3065 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3066 ntohs(cm_id->remote_addr.sin_port),
3067 ntohl(cm_id->local_addr.sin_addr.s_addr),
3068 ntohs(cm_id->local_addr.sin_port));
3069
3070 atomic_inc(&cm_connects);
3071 nesqp->active_conn = 1;
3072
3073 /* cache the cm_id in the qp */
3074 nesqp->cm_id = cm_id;
3075
3076 cm_id->provider_data = nesqp;
3077
3078 nesqp->private_data_len = conn_param->private_data_len;
3079 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3080 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3081 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3082 conn_param->private_data_len);
3083
3084 if (cm_id->local_addr.sin_addr.s_addr !=
3085 cm_id->remote_addr.sin_addr.s_addr) {
3086 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3087 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3088 apbvt_set = 1;
3089 }
3090
3091 /* set up the connection params for the node */
3092 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3093 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3094 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3095 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3096 cm_info.cm_id = cm_id;
3097 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3098
3099 cm_id->add_ref(cm_id);
3100
3101 /* create a connect CM node connection */
3102 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3103 conn_param->private_data_len, (void *)conn_param->private_data,
3104 &cm_info);
3105 if (!cm_node) {
3106 if (apbvt_set)
3107 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3108 PCI_FUNC(nesdev->pcidev->devfn),
3109 NES_MANAGE_APBVT_DEL);
3110
3111 cm_id->rem_ref(cm_id);
3112 return -ENOMEM;
3113 }
3114
3115 cm_node->apbvt_set = apbvt_set;
3116 nesqp->cm_node = cm_node;
3117 cm_node->nesqp = nesqp;
3118 nes_add_ref(&nesqp->ibqp);
3119
3120 return 0;
3121 }
3122
3123
3124 /**
3125 * nes_create_listen
3126 */
3127 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3128 {
3129 struct nes_vnic *nesvnic;
3130 struct nes_cm_listener *cm_node;
3131 struct nes_cm_info cm_info;
3132 int err;
3133
3134 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3135 cm_id, ntohs(cm_id->local_addr.sin_port));
3136
3137 nesvnic = to_nesvnic(cm_id->device);
3138 if (!nesvnic)
3139 return -EINVAL;
3140
3141 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3142 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3143
3144 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3145 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3146
3147 /* setup listen params in our api call struct */
3148 cm_info.loc_addr = nesvnic->local_ipaddr;
3149 cm_info.loc_port = cm_id->local_addr.sin_port;
3150 cm_info.backlog = backlog;
3151 cm_info.cm_id = cm_id;
3152
3153 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3154
3155
3156 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3157 if (!cm_node) {
3158 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3159 __func__, __LINE__);
3160 return -ENOMEM;
3161 }
3162
3163 cm_id->provider_data = cm_node;
3164
3165 if (!cm_node->reused_node) {
3166 err = nes_manage_apbvt(nesvnic,
3167 ntohs(cm_id->local_addr.sin_port),
3168 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3169 NES_MANAGE_APBVT_ADD);
3170 if (err) {
3171 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3172 err);
3173 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3174 return err;
3175 }
3176 atomic_inc(&cm_listens_created);
3177 }
3178
3179 cm_id->add_ref(cm_id);
3180 cm_id->provider_data = (void *)cm_node;
3181
3182
3183 return 0;
3184 }
3185
3186
3187 /**
3188 * nes_destroy_listen
3189 */
3190 int nes_destroy_listen(struct iw_cm_id *cm_id)
3191 {
3192 if (cm_id->provider_data)
3193 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3194 else
3195 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3196
3197 cm_id->rem_ref(cm_id);
3198
3199 return 0;
3200 }
3201
3202
3203 /**
3204 * nes_cm_recv
3205 */
3206 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3207 {
3208 int rc = 0;
3209 cm_packets_received++;
3210 if ((g_cm_core) && (g_cm_core->api)) {
3211 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3212 } else {
3213 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3214 " cm is not setup properly.\n");
3215 }
3216
3217 return rc;
3218 }
3219
3220
3221 /**
3222 * nes_cm_start
3223 * Start and init a cm core module
3224 */
3225 int nes_cm_start(void)
3226 {
3227 nes_debug(NES_DBG_CM, "\n");
3228 /* create the primary CM core, pass this handle to subsequent core inits */
3229 g_cm_core = nes_cm_alloc_core();
3230 if (g_cm_core) {
3231 return 0;
3232 } else {
3233 return -ENOMEM;
3234 }
3235 }
3236
3237
3238 /**
3239 * nes_cm_stop
3240 * stop and dealloc all cm core instances
3241 */
3242 int nes_cm_stop(void)
3243 {
3244 g_cm_core->api->destroy_cm_core(g_cm_core);
3245 return 0;
3246 }
3247
3248
3249 /**
3250 * cm_event_connected
3251 * handle a connected event, setup QPs and HW
3252 */
3253 static void cm_event_connected(struct nes_cm_event *event)
3254 {
3255 u64 u64temp;
3256 struct nes_qp *nesqp;
3257 struct nes_vnic *nesvnic;
3258 struct nes_device *nesdev;
3259 struct nes_cm_node *cm_node;
3260 struct nes_adapter *nesadapter;
3261 struct ib_qp_attr attr;
3262 struct iw_cm_id *cm_id;
3263 struct iw_cm_event cm_event;
3264 struct nes_hw_qp_wqe *wqe;
3265 struct nes_v4_quad nes_quad;
3266 u32 crc_value;
3267 int ret;
3268
3269 /* get all our handles */
3270 cm_node = event->cm_node;
3271 cm_id = cm_node->cm_id;
3272 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3273 nesqp = (struct nes_qp *)cm_id->provider_data;
3274 nesvnic = to_nesvnic(nesqp->ibqp.device);
3275 nesdev = nesvnic->nesdev;
3276 nesadapter = nesdev->nesadapter;
3277
3278 if (nesqp->destroyed) {
3279 return;
3280 }
3281 atomic_inc(&cm_connecteds);
3282 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3283 " local port 0x%04X. jiffies = %lu.\n",
3284 nesqp->hwqp.qp_id,
3285 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3286 ntohs(cm_id->remote_addr.sin_port),
3287 ntohs(cm_id->local_addr.sin_port),
3288 jiffies);
3289
3290 nes_cm_init_tsa_conn(nesqp, cm_node);
3291
3292 /* set the QP tsa context */
3293 nesqp->nesqp_context->tcpPorts[0] =
3294 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3295 nesqp->nesqp_context->tcpPorts[1] =
3296 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3297 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3298 nesqp->nesqp_context->ip0 =
3299 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3300 else
3301 nesqp->nesqp_context->ip0 =
3302 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3303
3304 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3305 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3306 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3307 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3308 nes_arp_table(nesdev,
3309 le32_to_cpu(nesqp->nesqp_context->ip0),
3310 NULL, NES_ARP_RESOLVE) << 16);
3311 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3312 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3313 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3314 nesqp->nesqp_context->ird_ord_sizes |=
3315 cpu_to_le32((u32)1 <<
3316 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3317
3318 /* Adjust tail for not having a LSMM */
3319 nesqp->hwqp.sq_tail = 1;
3320
3321 #if defined(NES_SEND_FIRST_WRITE)
3322 if (cm_node->send_write0) {
3323 nes_debug(NES_DBG_CM, "Sending first write.\n");
3324 wqe = &nesqp->hwqp.sq_vbase[0];
3325 u64temp = (unsigned long)nesqp;
3326 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3327 set_wqe_64bit_value(wqe->wqe_words,
3328 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3329 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3330 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3331 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3332 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3333 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3334 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3335 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3336
3337 if (nesqp->sq_kmapped) {
3338 nesqp->sq_kmapped = 0;
3339 kunmap(nesqp->page);
3340 }
3341
3342 /* use the reserved spot on the WQ for the extra first WQE */
3343 nesqp->nesqp_context->ird_ord_sizes &=
3344 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3345 NES_QPCONTEXT_ORDIRD_WRPDU |
3346 NES_QPCONTEXT_ORDIRD_ALSMM));
3347 nesqp->skip_lsmm = 1;
3348 nesqp->hwqp.sq_tail = 0;
3349 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3350 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3351 }
3352 #endif
3353
3354 memset(&nes_quad, 0, sizeof(nes_quad));
3355
3356 nes_quad.DstIpAdrIndex =
3357 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3358 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3359 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3360 else
3361 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3362 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3363 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3364
3365 /* Produce hash key */
3366 crc_value = get_crc_value(&nes_quad);
3367 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3368 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3369 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3370
3371 nesqp->hte_index &= nesadapter->hte_index_mask;
3372 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3373
3374 nesqp->ietf_frame = &cm_node->mpa_frame;
3375 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3376 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3377
3378 /* notify OF layer we successfully created the requested connection */
3379 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3380 cm_event.status = 0;
3381 cm_event.provider_data = cm_id->provider_data;
3382 cm_event.local_addr.sin_family = AF_INET;
3383 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3384 cm_event.remote_addr = cm_id->remote_addr;
3385
3386 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3387 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3388
3389 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3390 ret = cm_id->event_handler(cm_id, &cm_event);
3391 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3392
3393 if (ret)
3394 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3395 "ret=%d\n", __func__, __LINE__, ret);
3396 attr.qp_state = IB_QPS_RTS;
3397 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3398
3399 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3400 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3401
3402 return;
3403 }
3404
3405
3406 /**
3407 * cm_event_connect_error
3408 */
3409 static void cm_event_connect_error(struct nes_cm_event *event)
3410 {
3411 struct nes_qp *nesqp;
3412 struct iw_cm_id *cm_id;
3413 struct iw_cm_event cm_event;
3414 /* struct nes_cm_info cm_info; */
3415 int ret;
3416
3417 if (!event->cm_node)
3418 return;
3419
3420 cm_id = event->cm_node->cm_id;
3421 if (!cm_id) {
3422 return;
3423 }
3424
3425 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3426 nesqp = cm_id->provider_data;
3427
3428 if (!nesqp) {
3429 return;
3430 }
3431
3432 /* notify OF layer about this connection error event */
3433 /* cm_id->rem_ref(cm_id); */
3434 nesqp->cm_id = NULL;
3435 cm_id->provider_data = NULL;
3436 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3437 cm_event.status = -ECONNRESET;
3438 cm_event.provider_data = cm_id->provider_data;
3439 cm_event.local_addr = cm_id->local_addr;
3440 cm_event.remote_addr = cm_id->remote_addr;
3441 cm_event.private_data = NULL;
3442 cm_event.private_data_len = 0;
3443
3444 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3445 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3446 cm_event.remote_addr.sin_addr.s_addr);
3447
3448 ret = cm_id->event_handler(cm_id, &cm_event);
3449 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3450 if (ret)
3451 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3452 "ret=%d\n", __func__, __LINE__, ret);
3453 cm_id->rem_ref(cm_id);
3454
3455 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3456 return;
3457 }
3458
3459
3460 /**
3461 * cm_event_reset
3462 */
3463 static void cm_event_reset(struct nes_cm_event *event)
3464 {
3465 struct nes_qp *nesqp;
3466 struct iw_cm_id *cm_id;
3467 struct iw_cm_event cm_event;
3468 /* struct nes_cm_info cm_info; */
3469 int ret;
3470
3471 if (!event->cm_node)
3472 return;
3473
3474 if (!event->cm_node->cm_id)
3475 return;
3476
3477 cm_id = event->cm_node->cm_id;
3478
3479 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3480 nesqp = cm_id->provider_data;
3481 if (!nesqp)
3482 return;
3483
3484 nesqp->cm_id = NULL;
3485 /* cm_id->provider_data = NULL; */
3486 cm_event.event = IW_CM_EVENT_DISCONNECT;
3487 cm_event.status = -ECONNRESET;
3488 cm_event.provider_data = cm_id->provider_data;
3489 cm_event.local_addr = cm_id->local_addr;
3490 cm_event.remote_addr = cm_id->remote_addr;
3491 cm_event.private_data = NULL;
3492 cm_event.private_data_len = 0;
3493
3494 cm_id->add_ref(cm_id);
3495 ret = cm_id->event_handler(cm_id, &cm_event);
3496 atomic_inc(&cm_closes);
3497 cm_event.event = IW_CM_EVENT_CLOSE;
3498 cm_event.status = 0;
3499 cm_event.provider_data = cm_id->provider_data;
3500 cm_event.local_addr = cm_id->local_addr;
3501 cm_event.remote_addr = cm_id->remote_addr;
3502 cm_event.private_data = NULL;
3503 cm_event.private_data_len = 0;
3504 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3505 ret = cm_id->event_handler(cm_id, &cm_event);
3506
3507 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3508
3509
3510 /* notify OF layer about this connection error event */
3511 cm_id->rem_ref(cm_id);
3512
3513 return;
3514 }
3515
3516
3517 /**
3518 * cm_event_mpa_req
3519 */
3520 static void cm_event_mpa_req(struct nes_cm_event *event)
3521 {
3522 struct iw_cm_id *cm_id;
3523 struct iw_cm_event cm_event;
3524 int ret;
3525 struct nes_cm_node *cm_node;
3526
3527 cm_node = event->cm_node;
3528 if (!cm_node)
3529 return;
3530 cm_id = cm_node->cm_id;
3531
3532 atomic_inc(&cm_connect_reqs);
3533 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3534 cm_node, cm_id, jiffies);
3535
3536 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3537 cm_event.status = 0;
3538 cm_event.provider_data = (void *)cm_node;
3539
3540 cm_event.local_addr.sin_family = AF_INET;
3541 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3542 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3543
3544 cm_event.remote_addr.sin_family = AF_INET;
3545 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3546 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3547 cm_event.private_data = cm_node->mpa_frame_buf;
3548 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3549
3550 ret = cm_id->event_handler(cm_id, &cm_event);
3551 if (ret)
3552 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3553 __func__, __LINE__, ret);
3554 return;
3555 }
3556
3557
3558 static void cm_event_mpa_reject(struct nes_cm_event *event)
3559 {
3560 struct iw_cm_id *cm_id;
3561 struct iw_cm_event cm_event;
3562 struct nes_cm_node *cm_node;
3563 int ret;
3564
3565 cm_node = event->cm_node;
3566 if (!cm_node)
3567 return;
3568 cm_id = cm_node->cm_id;
3569
3570 atomic_inc(&cm_connect_reqs);
3571 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3572 cm_node, cm_id, jiffies);
3573
3574 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3575 cm_event.status = -ECONNREFUSED;
3576 cm_event.provider_data = cm_id->provider_data;
3577
3578 cm_event.local_addr.sin_family = AF_INET;
3579 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3580 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3581
3582 cm_event.remote_addr.sin_family = AF_INET;
3583 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3584 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3585
3586 cm_event.private_data = cm_node->mpa_frame_buf;
3587 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3588
3589 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3590 "remove_addr=%08x\n",
3591 cm_event.local_addr.sin_addr.s_addr,
3592 cm_event.remote_addr.sin_addr.s_addr);
3593
3594 ret = cm_id->event_handler(cm_id, &cm_event);
3595 if (ret)
3596 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3597 __func__, __LINE__, ret);
3598
3599 return;
3600 }
3601
3602
3603 static void nes_cm_event_handler(struct work_struct *);
3604
3605 /**
3606 * nes_cm_post_event
3607 * post an event to the cm event handler
3608 */
3609 static int nes_cm_post_event(struct nes_cm_event *event)
3610 {
3611 atomic_inc(&event->cm_node->cm_core->events_posted);
3612 add_ref_cm_node(event->cm_node);
3613 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3614 INIT_WORK(&event->event_work, nes_cm_event_handler);
3615 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3616 event->cm_node, event);
3617
3618 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3619
3620 nes_debug(NES_DBG_CM, "Exit\n");
3621 return 0;
3622 }
3623
3624
3625 /**
3626 * nes_cm_event_handler
3627 * worker function to handle cm events
3628 * will free instance of nes_cm_event
3629 */
3630 static void nes_cm_event_handler(struct work_struct *work)
3631 {
3632 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3633 event_work);
3634 struct nes_cm_core *cm_core;
3635
3636 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3637 return;
3638
3639 cm_core = event->cm_node->cm_core;
3640 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3641 event, event->type, atomic_read(&cm_core->events_posted));
3642
3643 switch (event->type) {
3644 case NES_CM_EVENT_MPA_REQ:
3645 cm_event_mpa_req(event);
3646 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3647 event->cm_node);
3648 break;
3649 case NES_CM_EVENT_RESET:
3650 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3651 event->cm_node);
3652 cm_event_reset(event);
3653 break;
3654 case NES_CM_EVENT_CONNECTED:
3655 if ((!event->cm_node->cm_id) ||
3656 (event->cm_node->state != NES_CM_STATE_TSA))
3657 break;
3658 cm_event_connected(event);
3659 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3660 break;
3661 case NES_CM_EVENT_MPA_REJECT:
3662 if ((!event->cm_node->cm_id) ||
3663 (event->cm_node->state == NES_CM_STATE_TSA))
3664 break;
3665 cm_event_mpa_reject(event);
3666 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3667 break;
3668
3669 case NES_CM_EVENT_ABORTED:
3670 if ((!event->cm_node->cm_id) ||
3671 (event->cm_node->state == NES_CM_STATE_TSA))
3672 break;
3673 cm_event_connect_error(event);
3674 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3675 break;
3676 case NES_CM_EVENT_DROPPED_PKT:
3677 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3678 break;
3679 default:
3680 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3681 break;
3682 }
3683
3684 atomic_dec(&cm_core->events_posted);
3685 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3686 rem_ref_cm_node(cm_core, event->cm_node);
3687 kfree(event);
3688
3689 return;
3690 }