RDMA/nes: Resource not freed for REJECTed connections
[linux-2.6.git] / drivers / infiniband / hw / nes / nes_cm.c
1 /*
2  * Copyright (c) 2006 - 2009 Intel Corporation.  All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  *
32  */
33
34
35 #define TCPOPT_TIMESTAMP 8
36
37 #include <asm/atomic.h>
38 #include <linux/skbuff.h>
39 #include <linux/ip.h>
40 #include <linux/tcp.h>
41 #include <linux/init.h>
42 #include <linux/if_arp.h>
43 #include <linux/if_vlan.h>
44 #include <linux/notifier.h>
45 #include <linux/net.h>
46 #include <linux/types.h>
47 #include <linux/timer.h>
48 #include <linux/time.h>
49 #include <linux/delay.h>
50 #include <linux/etherdevice.h>
51 #include <linux/netdevice.h>
52 #include <linux/random.h>
53 #include <linux/list.h>
54 #include <linux/threads.h>
55 #include <net/arp.h>
56 #include <net/neighbour.h>
57 #include <net/route.h>
58 #include <net/ip_fib.h>
59 #include <net/tcp.h>
60
61 #include "nes.h"
62
63 u32 cm_packets_sent;
64 u32 cm_packets_bounced;
65 u32 cm_packets_dropped;
66 u32 cm_packets_retrans;
67 u32 cm_packets_created;
68 u32 cm_packets_received;
69 u32 cm_listens_created;
70 u32 cm_listens_destroyed;
71 u32 cm_backlog_drops;
72 atomic_t cm_loopbacks;
73 atomic_t cm_nodes_created;
74 atomic_t cm_nodes_destroyed;
75 atomic_t cm_accel_dropped_pkts;
76 atomic_t cm_resets_recvd;
77
78 static inline int mini_cm_accelerated(struct nes_cm_core *,
79         struct nes_cm_node *);
80 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
81         struct nes_vnic *, struct nes_cm_info *);
82 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
83 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
84         struct nes_vnic *, u16, void *, struct nes_cm_info *);
85 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
86 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
87         struct nes_cm_node *);
88 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
89         struct nes_cm_node *);
90 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
91         struct sk_buff *);
92 static int mini_cm_dealloc_core(struct nes_cm_core *);
93 static int mini_cm_get(struct nes_cm_core *);
94 static int mini_cm_set(struct nes_cm_core *, u32, u32);
95
96 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
97         void *, u32, void *, u32, u8);
98 static int add_ref_cm_node(struct nes_cm_node *);
99 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
100
101 static int nes_cm_disconn_true(struct nes_qp *);
102 static int nes_cm_post_event(struct nes_cm_event *event);
103 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
104 static void nes_disconnect_worker(struct work_struct *work);
105
106 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
107 static int send_mpa_reject(struct nes_cm_node *);
108 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
109 static int send_reset(struct nes_cm_node *, struct sk_buff *);
110 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
111 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
112 static void process_packet(struct nes_cm_node *, struct sk_buff *,
113         struct nes_cm_core *);
114
115 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
116 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
117 static void cleanup_retrans_entry(struct nes_cm_node *);
118 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
119 static void free_retrans_entry(struct nes_cm_node *cm_node);
120 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
121         struct sk_buff *skb, int optionsize, int passive);
122
123 /* CM event handler functions */
124 static void cm_event_connected(struct nes_cm_event *);
125 static void cm_event_connect_error(struct nes_cm_event *);
126 static void cm_event_reset(struct nes_cm_event *);
127 static void cm_event_mpa_req(struct nes_cm_event *);
128 static void cm_event_mpa_reject(struct nes_cm_event *);
129 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
130
131 static void print_core(struct nes_cm_core *core);
132
133 /* External CM API Interface */
134 /* instance of function pointers for client API */
135 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
136 static struct nes_cm_ops nes_cm_api = {
137         mini_cm_accelerated,
138         mini_cm_listen,
139         mini_cm_del_listen,
140         mini_cm_connect,
141         mini_cm_close,
142         mini_cm_accept,
143         mini_cm_reject,
144         mini_cm_recv_pkt,
145         mini_cm_dealloc_core,
146         mini_cm_get,
147         mini_cm_set
148 };
149
150 static struct nes_cm_core *g_cm_core;
151
152 atomic_t cm_connects;
153 atomic_t cm_accepts;
154 atomic_t cm_disconnects;
155 atomic_t cm_closes;
156 atomic_t cm_connecteds;
157 atomic_t cm_connect_reqs;
158 atomic_t cm_rejects;
159
160
161 /**
162  * create_event
163  */
164 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
165                 enum nes_cm_event_type type)
166 {
167         struct nes_cm_event *event;
168
169         if (!cm_node->cm_id)
170                 return NULL;
171
172         /* allocate an empty event */
173         event = kzalloc(sizeof(*event), GFP_ATOMIC);
174
175         if (!event)
176                 return NULL;
177
178         event->type = type;
179         event->cm_node = cm_node;
180         event->cm_info.rem_addr = cm_node->rem_addr;
181         event->cm_info.loc_addr = cm_node->loc_addr;
182         event->cm_info.rem_port = cm_node->rem_port;
183         event->cm_info.loc_port = cm_node->loc_port;
184         event->cm_info.cm_id = cm_node->cm_id;
185
186         nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
187                 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
188                 cm_node, event, type, event->cm_info.loc_addr,
189                 event->cm_info.loc_port, event->cm_info.rem_addr,
190                 event->cm_info.rem_port);
191
192         nes_cm_post_event(event);
193         return event;
194 }
195
196
197 /**
198  * send_mpa_request
199  */
200 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
201 {
202         if (!skb) {
203                 nes_debug(NES_DBG_CM, "skb set to NULL\n");
204                 return -1;
205         }
206
207         /* send an MPA Request frame */
208         form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
209                         cm_node->mpa_frame_size, SET_ACK);
210
211         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
212 }
213
214
215
216 static int send_mpa_reject(struct nes_cm_node *cm_node)
217 {
218         struct sk_buff  *skb = NULL;
219
220         skb = dev_alloc_skb(MAX_CM_BUFFER);
221         if (!skb) {
222                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
223                 return -ENOMEM;
224         }
225
226         /* send an MPA reject frame */
227         form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
228                         cm_node->mpa_frame_size, SET_ACK | SET_FIN);
229
230         cm_node->state = NES_CM_STATE_FIN_WAIT1;
231         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
232 }
233
234
235 /**
236  * recv_mpa - process a received TCP pkt, we are expecting an
237  * IETF MPA frame
238  */
239 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
240                 u32 len)
241 {
242         struct ietf_mpa_frame *mpa_frame;
243
244         *type = NES_MPA_REQUEST_ACCEPT;
245
246         /* assume req frame is in tcp data payload */
247         if (len < sizeof(struct ietf_mpa_frame)) {
248                 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
249                 return -EINVAL;
250         }
251
252         mpa_frame = (struct ietf_mpa_frame *)buffer;
253         cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
254         /* make sure mpa private data len is less than 512 bytes */
255         if (cm_node->mpa_frame_size > IETF_MAX_PRIV_DATA_LEN) {
256                 nes_debug(NES_DBG_CM, "The received Length of Private"
257                         " Data field exceeds 512 octets\n");
258                 return -EINVAL;
259         }
260         /*
261          * make sure MPA receiver interoperate with the
262          * received MPA version and MPA key information
263          *
264          */
265         if (mpa_frame->rev != mpa_version) {
266                 nes_debug(NES_DBG_CM, "The received mpa version"
267                                 " can not be interoperated\n");
268                 return -EINVAL;
269         }
270         if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
271                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
272                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
273                         return -EINVAL;
274                 }
275         } else {
276                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
277                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
278                         return -EINVAL;
279                 }
280         }
281
282         if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
283                 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
284                                 " complete (%x + %x != %x)\n",
285                                 cm_node->mpa_frame_size,
286                                 (u32)sizeof(struct ietf_mpa_frame), len);
287                 return -EINVAL;
288         }
289         /* make sure it does not exceed the max size */
290         if (len > MAX_CM_BUFFER) {
291                 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
292                                 " (%x + %x != %x)\n",
293                                 cm_node->mpa_frame_size,
294                                 (u32)sizeof(struct ietf_mpa_frame), len);
295                 return -EINVAL;
296         }
297
298         /* copy entire MPA frame to our cm_node's frame */
299         memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
300                         cm_node->mpa_frame_size);
301
302         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
303                 *type = NES_MPA_REQUEST_REJECT;
304         return 0;
305 }
306
307
308 /**
309  * form_cm_frame - get a free packet and build empty frame Use
310  * node info to build.
311  */
312 static void form_cm_frame(struct sk_buff *skb,
313         struct nes_cm_node *cm_node, void *options, u32 optionsize,
314         void *data, u32 datasize, u8 flags)
315 {
316         struct tcphdr *tcph;
317         struct iphdr *iph;
318         struct ethhdr *ethh;
319         u8 *buf;
320         u16 packetsize = sizeof(*iph);
321
322         packetsize += sizeof(*tcph);
323         packetsize +=  optionsize + datasize;
324
325         memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
326
327         skb->len = 0;
328         buf = skb_put(skb, packetsize + ETH_HLEN);
329
330         ethh = (struct ethhdr *) buf;
331         buf += ETH_HLEN;
332
333         iph = (struct iphdr *)buf;
334         buf += sizeof(*iph);
335         tcph = (struct tcphdr *)buf;
336         skb_reset_mac_header(skb);
337         skb_set_network_header(skb, ETH_HLEN);
338         skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
339         buf += sizeof(*tcph);
340
341         skb->ip_summed = CHECKSUM_PARTIAL;
342         skb->protocol = htons(0x800);
343         skb->data_len = 0;
344         skb->mac_len = ETH_HLEN;
345
346         memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
347         memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
348         ethh->h_proto = htons(0x0800);
349
350         iph->version = IPVERSION;
351         iph->ihl = 5;           /* 5 * 4Byte words, IP headr len */
352         iph->tos = 0;
353         iph->tot_len = htons(packetsize);
354         iph->id = htons(++cm_node->tcp_cntxt.loc_id);
355
356         iph->frag_off = htons(0x4000);
357         iph->ttl = 0x40;
358         iph->protocol = 0x06;   /* IPPROTO_TCP */
359
360         iph->saddr = htonl(cm_node->loc_addr);
361         iph->daddr = htonl(cm_node->rem_addr);
362
363         tcph->source = htons(cm_node->loc_port);
364         tcph->dest = htons(cm_node->rem_port);
365         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
366
367         if (flags & SET_ACK) {
368                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
369                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
370                 tcph->ack = 1;
371         } else
372                 tcph->ack_seq = 0;
373
374         if (flags & SET_SYN) {
375                 cm_node->tcp_cntxt.loc_seq_num++;
376                 tcph->syn = 1;
377         } else
378                 cm_node->tcp_cntxt.loc_seq_num += datasize;
379
380         if (flags & SET_FIN) {
381                 cm_node->tcp_cntxt.loc_seq_num++;
382                 tcph->fin = 1;
383         }
384
385         if (flags & SET_RST)
386                 tcph->rst = 1;
387
388         tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
389         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
390         tcph->urg_ptr = 0;
391         if (optionsize)
392                 memcpy(buf, options, optionsize);
393         buf += optionsize;
394         if (datasize)
395                 memcpy(buf, data, datasize);
396
397         skb_shinfo(skb)->nr_frags = 0;
398         cm_packets_created++;
399
400 }
401
402
403 /**
404  * print_core - dump a cm core
405  */
406 static void print_core(struct nes_cm_core *core)
407 {
408         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
409         nes_debug(NES_DBG_CM, "CM Core  -- (core = %p )\n", core);
410         if (!core)
411                 return;
412         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
413
414         nes_debug(NES_DBG_CM, "State         : %u \n",  core->state);
415
416         nes_debug(NES_DBG_CM, "Listen Nodes  : %u \n", atomic_read(&core->listen_node_cnt));
417         nes_debug(NES_DBG_CM, "Active Nodes  : %u \n", atomic_read(&core->node_cnt));
418
419         nes_debug(NES_DBG_CM, "core          : %p \n", core);
420
421         nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
422 }
423
424
425 /**
426  * schedule_nes_timer
427  * note - cm_node needs to be protected before calling this. Encase in:
428  *                      rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
429  */
430 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
431                 enum nes_timer_type type, int send_retrans,
432                 int close_when_complete)
433 {
434         unsigned long  flags;
435         struct nes_cm_core *cm_core = cm_node->cm_core;
436         struct nes_timer_entry *new_send;
437         int ret = 0;
438         u32 was_timer_set;
439
440         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
441         if (!new_send)
442                 return -ENOMEM;
443
444         /* new_send->timetosend = currenttime */
445         new_send->retrycount = NES_DEFAULT_RETRYS;
446         new_send->retranscount = NES_DEFAULT_RETRANS;
447         new_send->skb = skb;
448         new_send->timetosend = jiffies;
449         new_send->type = type;
450         new_send->netdev = cm_node->netdev;
451         new_send->send_retrans = send_retrans;
452         new_send->close_when_complete = close_when_complete;
453
454         if (type == NES_TIMER_TYPE_CLOSE) {
455                 new_send->timetosend += (HZ/10);
456                 if (cm_node->recv_entry) {
457                         kfree(new_send);
458                         WARN_ON(1);
459                         return -EINVAL;
460                 }
461                 cm_node->recv_entry = new_send;
462         }
463
464         if (type == NES_TIMER_TYPE_SEND) {
465                 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
466                 atomic_inc(&new_send->skb->users);
467                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
468                 cm_node->send_entry = new_send;
469                 add_ref_cm_node(cm_node);
470                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
471                 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
472
473                 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
474                 if (ret != NETDEV_TX_OK) {
475                         nes_debug(NES_DBG_CM, "Error sending packet %p "
476                                 "(jiffies = %lu)\n", new_send, jiffies);
477                         new_send->timetosend = jiffies;
478                         ret = NETDEV_TX_OK;
479                 } else {
480                         cm_packets_sent++;
481                         if (!send_retrans) {
482                                 cleanup_retrans_entry(cm_node);
483                                 if (close_when_complete)
484                                         rem_ref_cm_node(cm_core, cm_node);
485                                 return ret;
486                         }
487                 }
488         }
489
490         was_timer_set = timer_pending(&cm_core->tcp_timer);
491
492         if (!was_timer_set) {
493                 cm_core->tcp_timer.expires = new_send->timetosend;
494                 add_timer(&cm_core->tcp_timer);
495         }
496
497         return ret;
498 }
499
500 static void nes_retrans_expired(struct nes_cm_node *cm_node)
501 {
502         struct iw_cm_id *cm_id = cm_node->cm_id;
503         switch (cm_node->state) {
504         case NES_CM_STATE_SYN_RCVD:
505         case NES_CM_STATE_CLOSING:
506                 rem_ref_cm_node(cm_node->cm_core, cm_node);
507                 break;
508         case NES_CM_STATE_LAST_ACK:
509         case NES_CM_STATE_FIN_WAIT1:
510                 if (cm_node->cm_id)
511                         cm_id->rem_ref(cm_id);
512                 cm_node->state = NES_CM_STATE_CLOSED;
513                 send_reset(cm_node, NULL);
514                 break;
515         default:
516                 add_ref_cm_node(cm_node);
517                 send_reset(cm_node, NULL);
518                 create_event(cm_node, NES_CM_EVENT_ABORTED);
519         }
520 }
521
522 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
523 {
524         struct nes_timer_entry *recv_entry = cm_node->recv_entry;
525         struct iw_cm_id *cm_id = cm_node->cm_id;
526         struct nes_qp *nesqp;
527         unsigned long qplockflags;
528
529         if (!recv_entry)
530                 return;
531         nesqp = (struct nes_qp *)recv_entry->skb;
532         if (nesqp) {
533                 spin_lock_irqsave(&nesqp->lock, qplockflags);
534                 if (nesqp->cm_id) {
535                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
536                                 "refcount = %d: HIT A "
537                                 "NES_TIMER_TYPE_CLOSE with something "
538                                 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
539                                 atomic_read(&nesqp->refcount));
540                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
541                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
542                         nesqp->ibqp_state = IB_QPS_ERR;
543                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
544                         nes_cm_disconn(nesqp);
545                 } else {
546                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
547                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
548                                 "refcount = %d: HIT A "
549                                 "NES_TIMER_TYPE_CLOSE with nothing "
550                                 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
551                                 atomic_read(&nesqp->refcount));
552                 }
553         } else if (rem_node) {
554                 /* TIME_WAIT state */
555                 rem_ref_cm_node(cm_node->cm_core, cm_node);
556         }
557         if (cm_node->cm_id)
558                 cm_id->rem_ref(cm_id);
559         kfree(recv_entry);
560         cm_node->recv_entry = NULL;
561 }
562
563 /**
564  * nes_cm_timer_tick
565  */
566 static void nes_cm_timer_tick(unsigned long pass)
567 {
568         unsigned long flags;
569         unsigned long nexttimeout = jiffies + NES_LONG_TIME;
570         struct nes_cm_node *cm_node;
571         struct nes_timer_entry *send_entry, *recv_entry;
572         struct list_head *list_core_temp;
573         struct list_head *list_node;
574         struct nes_cm_core *cm_core = g_cm_core;
575         u32 settimer = 0;
576         unsigned long timetosend;
577         int ret = NETDEV_TX_OK;
578
579         struct list_head timer_list;
580         INIT_LIST_HEAD(&timer_list);
581         spin_lock_irqsave(&cm_core->ht_lock, flags);
582
583         list_for_each_safe(list_node, list_core_temp,
584                                 &cm_core->connected_nodes) {
585                 cm_node = container_of(list_node, struct nes_cm_node, list);
586                 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
587                         add_ref_cm_node(cm_node);
588                         list_add(&cm_node->timer_entry, &timer_list);
589                 }
590         }
591         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
592
593         list_for_each_safe(list_node, list_core_temp, &timer_list) {
594                 cm_node = container_of(list_node, struct nes_cm_node,
595                                         timer_entry);
596                 recv_entry = cm_node->recv_entry;
597
598                 if (recv_entry) {
599                         if (time_after(recv_entry->timetosend, jiffies)) {
600                                 if (nexttimeout > recv_entry->timetosend ||
601                                                 !settimer) {
602                                         nexttimeout = recv_entry->timetosend;
603                                         settimer = 1;
604                                 }
605                         } else
606                                 handle_recv_entry(cm_node, 1);
607                 }
608
609                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
610                 do {
611                         send_entry = cm_node->send_entry;
612                         if (!send_entry)
613                                 break;
614                         if (time_after(send_entry->timetosend, jiffies)) {
615                                 if (cm_node->state != NES_CM_STATE_TSA) {
616                                         if ((nexttimeout >
617                                                 send_entry->timetosend) ||
618                                                 !settimer) {
619                                                 nexttimeout =
620                                                         send_entry->timetosend;
621                                                 settimer = 1;
622                                         }
623                                 } else {
624                                         free_retrans_entry(cm_node);
625                                 }
626                                 break;
627                         }
628
629                         if ((cm_node->state == NES_CM_STATE_TSA) ||
630                                 (cm_node->state == NES_CM_STATE_CLOSED)) {
631                                 free_retrans_entry(cm_node);
632                                 break;
633                         }
634
635                         if (!send_entry->retranscount ||
636                                 !send_entry->retrycount) {
637                                 cm_packets_dropped++;
638                                 free_retrans_entry(cm_node);
639
640                                 spin_unlock_irqrestore(
641                                         &cm_node->retrans_list_lock, flags);
642                                 nes_retrans_expired(cm_node);
643                                 cm_node->state = NES_CM_STATE_CLOSED;
644                                 spin_lock_irqsave(&cm_node->retrans_list_lock,
645                                         flags);
646                                 break;
647                         }
648                         atomic_inc(&send_entry->skb->users);
649                         cm_packets_retrans++;
650                         nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
651                                 "for node %p, jiffies = %lu, time to send = "
652                                 "%lu, retranscount = %u, send_entry->seq_num = "
653                                 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
654                                 "0x%08X\n", send_entry, cm_node, jiffies,
655                                 send_entry->timetosend,
656                                 send_entry->retranscount,
657                                 send_entry->seq_num,
658                                 cm_node->tcp_cntxt.rem_ack_num);
659
660                         spin_unlock_irqrestore(&cm_node->retrans_list_lock,
661                                 flags);
662                         ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
663                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
664                         if (ret != NETDEV_TX_OK) {
665                                 nes_debug(NES_DBG_CM, "rexmit failed for "
666                                         "node=%p\n", cm_node);
667                                 cm_packets_bounced++;
668                                 send_entry->retrycount--;
669                                 nexttimeout = jiffies + NES_SHORT_TIME;
670                                 settimer = 1;
671                                 break;
672                         } else {
673                                 cm_packets_sent++;
674                         }
675                         nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
676                                 "%u, retry count = %u.\n",
677                                 send_entry->retranscount,
678                                 send_entry->retrycount);
679                         if (send_entry->send_retrans) {
680                                 send_entry->retranscount--;
681                                 timetosend = (NES_RETRY_TIMEOUT <<
682                                         (NES_DEFAULT_RETRANS - send_entry->retranscount));
683
684                                 send_entry->timetosend = jiffies +
685                                         min(timetosend, NES_MAX_TIMEOUT);
686                                 if (nexttimeout > send_entry->timetosend ||
687                                         !settimer) {
688                                         nexttimeout = send_entry->timetosend;
689                                         settimer = 1;
690                                 }
691                         } else {
692                                 int close_when_complete;
693                                 close_when_complete =
694                                         send_entry->close_when_complete;
695                                 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
696                                         cm_node, cm_node->state);
697                                 free_retrans_entry(cm_node);
698                                 if (close_when_complete)
699                                         rem_ref_cm_node(cm_node->cm_core,
700                                                 cm_node);
701                         }
702                 } while (0);
703
704                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
705                 rem_ref_cm_node(cm_node->cm_core, cm_node);
706         }
707
708         if (settimer) {
709                 if (!timer_pending(&cm_core->tcp_timer)) {
710                         cm_core->tcp_timer.expires  = nexttimeout;
711                         add_timer(&cm_core->tcp_timer);
712                 }
713         }
714 }
715
716
717 /**
718  * send_syn
719  */
720 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
721         struct sk_buff *skb)
722 {
723         int ret;
724         int flags = SET_SYN;
725         char optionsbuffer[sizeof(struct option_mss) +
726                 sizeof(struct option_windowscale) + sizeof(struct option_base) +
727                 TCP_OPTIONS_PADDING];
728
729         int optionssize = 0;
730         /* Sending MSS option */
731         union all_known_options *options;
732
733         if (!cm_node)
734                 return -EINVAL;
735
736         options = (union all_known_options *)&optionsbuffer[optionssize];
737         options->as_mss.optionnum = OPTION_NUMBER_MSS;
738         options->as_mss.length = sizeof(struct option_mss);
739         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
740         optionssize += sizeof(struct option_mss);
741
742         options = (union all_known_options *)&optionsbuffer[optionssize];
743         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
744         options->as_windowscale.length = sizeof(struct option_windowscale);
745         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
746         optionssize += sizeof(struct option_windowscale);
747
748         if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
749                 options = (union all_known_options *)&optionsbuffer[optionssize];
750                 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
751                 options->as_base.length = sizeof(struct option_base);
752                 optionssize += sizeof(struct option_base);
753                 /* we need the size to be a multiple of 4 */
754                 options = (union all_known_options *)&optionsbuffer[optionssize];
755                 options->as_end = 1;
756                 optionssize += 1;
757                 options = (union all_known_options *)&optionsbuffer[optionssize];
758                 options->as_end = 1;
759                 optionssize += 1;
760         }
761
762         options = (union all_known_options *)&optionsbuffer[optionssize];
763         options->as_end = OPTION_NUMBER_END;
764         optionssize += 1;
765
766         if (!skb)
767                 skb = dev_alloc_skb(MAX_CM_BUFFER);
768         if (!skb) {
769                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
770                 return -1;
771         }
772
773         if (sendack)
774                 flags |= SET_ACK;
775
776         form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
777         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
778
779         return ret;
780 }
781
782
783 /**
784  * send_reset
785  */
786 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
787 {
788         int ret;
789         int flags = SET_RST | SET_ACK;
790
791         if (!skb)
792                 skb = dev_alloc_skb(MAX_CM_BUFFER);
793         if (!skb) {
794                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
795                 return -ENOMEM;
796         }
797
798         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
799         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
800
801         return ret;
802 }
803
804
805 /**
806  * send_ack
807  */
808 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
809 {
810         int ret;
811
812         if (!skb)
813                 skb = dev_alloc_skb(MAX_CM_BUFFER);
814
815         if (!skb) {
816                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
817                 return -1;
818         }
819
820         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
821         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
822
823         return ret;
824 }
825
826
827 /**
828  * send_fin
829  */
830 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
831 {
832         int ret;
833
834         /* if we didn't get a frame get one */
835         if (!skb)
836                 skb = dev_alloc_skb(MAX_CM_BUFFER);
837
838         if (!skb) {
839                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
840                 return -1;
841         }
842
843         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
844         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
845
846         return ret;
847 }
848
849
850 /**
851  * find_node - find a cm node that matches the reference cm node
852  */
853 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
854                 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
855 {
856         unsigned long flags;
857         struct list_head *hte;
858         struct nes_cm_node *cm_node;
859
860         /* get a handle on the hte */
861         hte = &cm_core->connected_nodes;
862
863         /* walk list and find cm_node associated with this session ID */
864         spin_lock_irqsave(&cm_core->ht_lock, flags);
865         list_for_each_entry(cm_node, hte, list) {
866                 /* compare quad, return node handle if a match */
867                 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
868                                 cm_node->loc_addr, cm_node->loc_port,
869                                 loc_addr, loc_port,
870                                 cm_node->rem_addr, cm_node->rem_port,
871                                 rem_addr, rem_port);
872                 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
873                                 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
874                         add_ref_cm_node(cm_node);
875                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
876                         return cm_node;
877                 }
878         }
879         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
880
881         /* no owner node */
882         return NULL;
883 }
884
885
886 /**
887  * find_listener - find a cm node listening on this addr-port pair
888  */
889 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
890                 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
891 {
892         unsigned long flags;
893         struct nes_cm_listener *listen_node;
894
895         /* walk list and find cm_node associated with this session ID */
896         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
897         list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
898                 /* compare node pair, return node handle if a match */
899                 if (((listen_node->loc_addr == dst_addr) ||
900                                 listen_node->loc_addr == 0x00000000) &&
901                                 (listen_node->loc_port == dst_port) &&
902                                 (listener_state & listen_node->listener_state)) {
903                         atomic_inc(&listen_node->ref_count);
904                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
905                         return listen_node;
906                 }
907         }
908         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
909
910         /* no listener */
911         return NULL;
912 }
913
914
915 /**
916  * add_hte_node - add a cm node to the hash table
917  */
918 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
919 {
920         unsigned long flags;
921         struct list_head *hte;
922
923         if (!cm_node || !cm_core)
924                 return -EINVAL;
925
926         nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
927                 cm_node);
928
929         spin_lock_irqsave(&cm_core->ht_lock, flags);
930
931         /* get a handle on the hash table element (list head for this slot) */
932         hte = &cm_core->connected_nodes;
933         list_add_tail(&cm_node->list, hte);
934         atomic_inc(&cm_core->ht_node_cnt);
935
936         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
937
938         return 0;
939 }
940
941
942 /**
943  * mini_cm_dec_refcnt_listen
944  */
945 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
946         struct nes_cm_listener *listener, int free_hanging_nodes)
947 {
948         int ret = -EINVAL;
949         int err = 0;
950         unsigned long flags;
951         struct list_head *list_pos = NULL;
952         struct list_head *list_temp = NULL;
953         struct nes_cm_node *cm_node = NULL;
954         struct list_head reset_list;
955
956         nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
957                 "refcnt=%d\n", listener, free_hanging_nodes,
958                 atomic_read(&listener->ref_count));
959         /* free non-accelerated child nodes for this listener */
960         INIT_LIST_HEAD(&reset_list);
961         if (free_hanging_nodes) {
962                 spin_lock_irqsave(&cm_core->ht_lock, flags);
963                 list_for_each_safe(list_pos, list_temp,
964                                    &g_cm_core->connected_nodes) {
965                         cm_node = container_of(list_pos, struct nes_cm_node,
966                                 list);
967                         if ((cm_node->listener == listener) &&
968                             (!cm_node->accelerated)) {
969                                 add_ref_cm_node(cm_node);
970                                 list_add(&cm_node->reset_entry, &reset_list);
971                         }
972                 }
973                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
974         }
975
976         list_for_each_safe(list_pos, list_temp, &reset_list) {
977                 cm_node = container_of(list_pos, struct nes_cm_node,
978                                 reset_entry);
979                 {
980                         struct nes_cm_node *loopback = cm_node->loopbackpartner;
981                         if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
982                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
983                         } else {
984                                 if (!loopback) {
985                                         cleanup_retrans_entry(cm_node);
986                                         err = send_reset(cm_node, NULL);
987                                         if (err) {
988                                                 cm_node->state =
989                                                          NES_CM_STATE_CLOSED;
990                                                 WARN_ON(1);
991                                         } else {
992                                                 cm_node->state =
993                                                         NES_CM_STATE_CLOSED;
994                                                 rem_ref_cm_node(
995                                                         cm_node->cm_core,
996                                                         cm_node);
997                                         }
998                                 } else {
999                                         struct nes_cm_event event;
1000
1001                                         event.cm_node = loopback;
1002                                         event.cm_info.rem_addr =
1003                                                         loopback->rem_addr;
1004                                         event.cm_info.loc_addr =
1005                                                         loopback->loc_addr;
1006                                         event.cm_info.rem_port =
1007                                                         loopback->rem_port;
1008                                         event.cm_info.loc_port =
1009                                                          loopback->loc_port;
1010                                         event.cm_info.cm_id = loopback->cm_id;
1011                                         cm_event_connect_error(&event);
1012                                         loopback->state = NES_CM_STATE_CLOSED;
1013
1014                                         event.cm_node = cm_node;
1015                                         event.cm_info.rem_addr =
1016                                                          cm_node->rem_addr;
1017                                         event.cm_info.loc_addr =
1018                                                          cm_node->loc_addr;
1019                                         event.cm_info.rem_port =
1020                                                          cm_node->rem_port;
1021                                         event.cm_info.loc_port =
1022                                                          cm_node->loc_port;
1023                                         event.cm_info.cm_id = cm_node->cm_id;
1024                                         cm_event_reset(&event);
1025
1026                                         rem_ref_cm_node(cm_node->cm_core,
1027                                                          cm_node);
1028
1029                                 }
1030                         }
1031                 }
1032         }
1033
1034         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1035         if (!atomic_dec_return(&listener->ref_count)) {
1036                 list_del(&listener->list);
1037
1038                 /* decrement our listen node count */
1039                 atomic_dec(&cm_core->listen_node_cnt);
1040
1041                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1042
1043                 if (listener->nesvnic) {
1044                         nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1045                                         PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1046                 }
1047
1048                 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1049
1050                 kfree(listener);
1051                 listener = NULL;
1052                 ret = 0;
1053                 cm_listens_destroyed++;
1054         } else {
1055                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1056         }
1057         if (listener) {
1058                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1059                         nes_debug(NES_DBG_CM, "destroying listener (%p)"
1060                                         " with non-zero pending accepts=%u\n",
1061                                         listener, atomic_read(&listener->pend_accepts_cnt));
1062         }
1063
1064         return ret;
1065 }
1066
1067
1068 /**
1069  * mini_cm_del_listen
1070  */
1071 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1072                 struct nes_cm_listener *listener)
1073 {
1074         listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1075         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1076         return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1077 }
1078
1079
1080 /**
1081  * mini_cm_accelerated
1082  */
1083 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1084                 struct nes_cm_node *cm_node)
1085 {
1086         u32 was_timer_set;
1087         cm_node->accelerated = 1;
1088
1089         if (cm_node->accept_pend) {
1090                 BUG_ON(!cm_node->listener);
1091                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1092                 cm_node->accept_pend = 0;
1093                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1094         }
1095
1096         was_timer_set = timer_pending(&cm_core->tcp_timer);
1097         if (!was_timer_set) {
1098                 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1099                 add_timer(&cm_core->tcp_timer);
1100         }
1101
1102         return 0;
1103 }
1104
1105
1106 /**
1107  * nes_addr_resolve_neigh
1108  */
1109 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
1110 {
1111         struct rtable *rt;
1112         struct flowi fl;
1113         struct neighbour *neigh;
1114         int rc = -1;
1115
1116         memset(&fl, 0, sizeof fl);
1117         fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1118         if (ip_route_output_key(&init_net, &rt, &fl)) {
1119                 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1120                                 __func__, dst_ip);
1121                 return rc;
1122         }
1123
1124         neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->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                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1131                                              dst_ip, NES_ARP_ADD);
1132                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1133                                            NES_ARP_RESOLVE);
1134                 }
1135                 neigh_release(neigh);
1136         }
1137
1138         if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1139                 neigh_event_send(rt->u.dst.neighbour, NULL);
1140
1141         ip_rt_put(rt);
1142         return rc;
1143 }
1144
1145
1146 /**
1147  * make_cm_node - create a new instance of a cm node
1148  */
1149 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1150                 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1151                 struct nes_cm_listener *listener)
1152 {
1153         struct nes_cm_node *cm_node;
1154         struct timespec ts;
1155         int arpindex = 0;
1156         struct nes_device *nesdev;
1157         struct nes_adapter *nesadapter;
1158
1159         /* create an hte and cm_node for this instance */
1160         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1161         if (!cm_node)
1162                 return NULL;
1163
1164         /* set our node specific transport info */
1165         cm_node->loc_addr = cm_info->loc_addr;
1166         cm_node->rem_addr = cm_info->rem_addr;
1167         cm_node->loc_port = cm_info->loc_port;
1168         cm_node->rem_port = cm_info->rem_port;
1169         cm_node->send_write0 = send_first;
1170         nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1171                   &cm_node->loc_addr, cm_node->loc_port,
1172                   &cm_node->rem_addr, cm_node->rem_port);
1173         cm_node->listener = listener;
1174         cm_node->netdev = nesvnic->netdev;
1175         cm_node->cm_id = cm_info->cm_id;
1176         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1177
1178         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1179                         cm_node->cm_id);
1180
1181         spin_lock_init(&cm_node->retrans_list_lock);
1182
1183         cm_node->loopbackpartner = NULL;
1184         atomic_set(&cm_node->ref_count, 1);
1185         /* associate our parent CM core */
1186         cm_node->cm_core = cm_core;
1187         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1188         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1189         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1190                         NES_CM_DEFAULT_RCV_WND_SCALE;
1191         ts = current_kernel_time();
1192         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1193         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1194                         sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1195         cm_node->tcp_cntxt.rcv_nxt = 0;
1196         /* get a unique session ID , add thread_id to an upcounter to handle race */
1197         atomic_inc(&cm_core->node_cnt);
1198         cm_node->conn_type = cm_info->conn_type;
1199         cm_node->apbvt_set = 0;
1200         cm_node->accept_pend = 0;
1201
1202         cm_node->nesvnic = nesvnic;
1203         /* get some device handles, for arp lookup */
1204         nesdev = nesvnic->nesdev;
1205         nesadapter = nesdev->nesadapter;
1206
1207         cm_node->loopbackpartner = NULL;
1208         /* get the mac addr for the remote node */
1209         if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1210                 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1211         else
1212                 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1213         if (arpindex < 0) {
1214                 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1215                 if (arpindex < 0) {
1216                         kfree(cm_node);
1217                         return NULL;
1218                 }
1219         }
1220
1221         /* copy the mac addr to node context */
1222         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1223         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1224                   cm_node->rem_mac);
1225
1226         add_hte_node(cm_core, cm_node);
1227         atomic_inc(&cm_nodes_created);
1228
1229         return cm_node;
1230 }
1231
1232
1233 /**
1234  * add_ref_cm_node - destroy an instance of a cm node
1235  */
1236 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1237 {
1238         atomic_inc(&cm_node->ref_count);
1239         return 0;
1240 }
1241
1242
1243 /**
1244  * rem_ref_cm_node - destroy an instance of a cm node
1245  */
1246 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1247         struct nes_cm_node *cm_node)
1248 {
1249         unsigned long flags;
1250         struct nes_qp *nesqp;
1251
1252         if (!cm_node)
1253                 return -EINVAL;
1254
1255         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1256         if (atomic_dec_return(&cm_node->ref_count)) {
1257                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1258                 return 0;
1259         }
1260         list_del(&cm_node->list);
1261         atomic_dec(&cm_core->ht_node_cnt);
1262         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1263
1264         /* if the node is destroyed before connection was accelerated */
1265         if (!cm_node->accelerated && cm_node->accept_pend) {
1266                 BUG_ON(!cm_node->listener);
1267                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1268                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1269         }
1270         WARN_ON(cm_node->send_entry);
1271         if (cm_node->recv_entry)
1272                 handle_recv_entry(cm_node, 0);
1273         if (cm_node->listener) {
1274                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1275         } else {
1276                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1277                         nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1278                                 PCI_FUNC(
1279                                 cm_node->nesvnic->nesdev->pcidev->devfn),
1280                                 NES_MANAGE_APBVT_DEL);
1281                 }
1282         }
1283
1284         atomic_dec(&cm_core->node_cnt);
1285         atomic_inc(&cm_nodes_destroyed);
1286         nesqp = cm_node->nesqp;
1287         if (nesqp) {
1288                 nesqp->cm_node = NULL;
1289                 nes_rem_ref(&nesqp->ibqp);
1290                 cm_node->nesqp = NULL;
1291         }
1292
1293         kfree(cm_node);
1294         return 0;
1295 }
1296
1297 /**
1298  * process_options
1299  */
1300 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1301         u32 optionsize, u32 syn_packet)
1302 {
1303         u32 tmp;
1304         u32 offset = 0;
1305         union all_known_options *all_options;
1306         char got_mss_option = 0;
1307
1308         while (offset < optionsize) {
1309                 all_options = (union all_known_options *)(optionsloc + offset);
1310                 switch (all_options->as_base.optionnum) {
1311                 case OPTION_NUMBER_END:
1312                         offset = optionsize;
1313                         break;
1314                 case OPTION_NUMBER_NONE:
1315                         offset += 1;
1316                         continue;
1317                 case OPTION_NUMBER_MSS:
1318                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1319                                 "Size: %d\n", __func__,
1320                                 all_options->as_mss.length, offset, optionsize);
1321                         got_mss_option = 1;
1322                         if (all_options->as_mss.length != 4) {
1323                                 return 1;
1324                         } else {
1325                                 tmp = ntohs(all_options->as_mss.mss);
1326                                 if (tmp > 0 && tmp <
1327                                         cm_node->tcp_cntxt.mss)
1328                                         cm_node->tcp_cntxt.mss = tmp;
1329                         }
1330                         break;
1331                 case OPTION_NUMBER_WINDOW_SCALE:
1332                         cm_node->tcp_cntxt.snd_wscale =
1333                                 all_options->as_windowscale.shiftcount;
1334                         break;
1335                 case OPTION_NUMBER_WRITE0:
1336                         cm_node->send_write0 = 1;
1337                         break;
1338                 default:
1339                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1340                                 all_options->as_base.optionnum);
1341                         break;
1342                 }
1343                 offset += all_options->as_base.length;
1344         }
1345         if ((!got_mss_option) && (syn_packet))
1346                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1347         return 0;
1348 }
1349
1350 static void drop_packet(struct sk_buff *skb)
1351 {
1352         atomic_inc(&cm_accel_dropped_pkts);
1353         dev_kfree_skb_any(skb);
1354 }
1355
1356 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1357 {
1358         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1359                 "refcnt=%d\n", cm_node, cm_node->state,
1360                 atomic_read(&cm_node->ref_count));
1361         switch (cm_node->state) {
1362         case NES_CM_STATE_SYN_RCVD:
1363         case NES_CM_STATE_SYN_SENT:
1364         case NES_CM_STATE_ESTABLISHED:
1365         case NES_CM_STATE_MPAREQ_SENT:
1366         case NES_CM_STATE_MPAREJ_RCVD:
1367                 cm_node->tcp_cntxt.rcv_nxt++;
1368                 cleanup_retrans_entry(cm_node);
1369                 cm_node->state = NES_CM_STATE_LAST_ACK;
1370                 send_fin(cm_node, NULL);
1371                 break;
1372         case NES_CM_STATE_FIN_WAIT1:
1373                 cm_node->tcp_cntxt.rcv_nxt++;
1374                 cleanup_retrans_entry(cm_node);
1375                 cm_node->state = NES_CM_STATE_CLOSING;
1376                 send_ack(cm_node, NULL);
1377                 /* Wait for ACK as this is simultanous close..
1378                 * After we receive ACK, do not send anything..
1379                 * Just rm the node.. Done.. */
1380                 break;
1381         case NES_CM_STATE_FIN_WAIT2:
1382                 cm_node->tcp_cntxt.rcv_nxt++;
1383                 cleanup_retrans_entry(cm_node);
1384                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1385                 send_ack(cm_node, NULL);
1386                 schedule_nes_timer(cm_node, NULL,  NES_TIMER_TYPE_CLOSE, 1, 0);
1387                 break;
1388         case NES_CM_STATE_TIME_WAIT:
1389                 cm_node->tcp_cntxt.rcv_nxt++;
1390                 cleanup_retrans_entry(cm_node);
1391                 cm_node->state = NES_CM_STATE_CLOSED;
1392                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1393                 break;
1394         case NES_CM_STATE_TSA:
1395         default:
1396                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1397                         cm_node, cm_node->state);
1398                 break;
1399         }
1400 }
1401
1402
1403 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1404         struct tcphdr *tcph)
1405 {
1406
1407         int     reset = 0;      /* whether to send reset in case of err.. */
1408         int     passive_state;
1409         atomic_inc(&cm_resets_recvd);
1410         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1411                         " refcnt=%d\n", cm_node, cm_node->state,
1412                         atomic_read(&cm_node->ref_count));
1413         cleanup_retrans_entry(cm_node);
1414         switch (cm_node->state) {
1415         case NES_CM_STATE_SYN_SENT:
1416         case NES_CM_STATE_MPAREQ_SENT:
1417                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1418                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1419                         cm_node->listener, cm_node->state);
1420                 active_open_err(cm_node, skb, reset);
1421                 break;
1422         case NES_CM_STATE_MPAREQ_RCVD:
1423                 passive_state = atomic_add_return(1, &cm_node->passive_state);
1424                 if (passive_state ==  NES_SEND_RESET_EVENT)
1425                         create_event(cm_node, NES_CM_EVENT_RESET);
1426                 cm_node->state = NES_CM_STATE_CLOSED;
1427                 dev_kfree_skb_any(skb);
1428                 break;
1429         case NES_CM_STATE_ESTABLISHED:
1430         case NES_CM_STATE_SYN_RCVD:
1431         case NES_CM_STATE_LISTENING:
1432                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1433                 passive_open_err(cm_node, skb, reset);
1434                 break;
1435         case NES_CM_STATE_TSA:
1436                 active_open_err(cm_node, skb, reset);
1437                 break;
1438         case NES_CM_STATE_CLOSED:
1439                 drop_packet(skb);
1440                 break;
1441         case NES_CM_STATE_FIN_WAIT1:
1442         case NES_CM_STATE_LAST_ACK:
1443                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1444         case NES_CM_STATE_TIME_WAIT:
1445                 cm_node->state = NES_CM_STATE_CLOSED;
1446                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1447                 drop_packet(skb);
1448                 break;
1449         default:
1450                 drop_packet(skb);
1451                 break;
1452         }
1453 }
1454
1455
1456 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1457 {
1458
1459         int     ret = 0;
1460         int datasize = skb->len;
1461         u8 *dataloc = skb->data;
1462
1463         enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1464         u32     res_type;
1465         ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1466         if (ret) {
1467                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1468                 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1469                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1470                                 "cm_node=%p listener=%p state=%d\n", __func__,
1471                                 __LINE__, cm_node, cm_node->listener,
1472                                 cm_node->state);
1473                         active_open_err(cm_node, skb, 1);
1474                 } else {
1475                         passive_open_err(cm_node, skb, 1);
1476                 }
1477                 return;
1478         }
1479
1480         switch (cm_node->state) {
1481         case NES_CM_STATE_ESTABLISHED:
1482                 if (res_type == NES_MPA_REQUEST_REJECT) {
1483                         /*BIG problem as we are receiving the MPA.. So should
1484                         * not be REJECT.. This is Passive Open.. We can
1485                         * only receive it Reject for Active Open...*/
1486                         WARN_ON(1);
1487                 }
1488                 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1489                 type = NES_CM_EVENT_MPA_REQ;
1490                 atomic_set(&cm_node->passive_state,
1491                                 NES_PASSIVE_STATE_INDICATED);
1492                 break;
1493         case NES_CM_STATE_MPAREQ_SENT:
1494                 cleanup_retrans_entry(cm_node);
1495                 if (res_type == NES_MPA_REQUEST_REJECT) {
1496                         type = NES_CM_EVENT_MPA_REJECT;
1497                         cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1498                 } else {
1499                         type = NES_CM_EVENT_CONNECTED;
1500                         cm_node->state = NES_CM_STATE_TSA;
1501                 }
1502
1503                 break;
1504         default:
1505                 WARN_ON(1);
1506                 break;
1507         }
1508         dev_kfree_skb_any(skb);
1509         create_event(cm_node, type);
1510 }
1511
1512 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1513 {
1514         switch (cm_node->state) {
1515         case NES_CM_STATE_SYN_SENT:
1516         case NES_CM_STATE_MPAREQ_SENT:
1517                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1518                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1519                         cm_node->listener, cm_node->state);
1520                 active_open_err(cm_node, skb, 1);
1521                 break;
1522         case NES_CM_STATE_ESTABLISHED:
1523         case NES_CM_STATE_SYN_RCVD:
1524                 passive_open_err(cm_node, skb, 1);
1525                 break;
1526         case NES_CM_STATE_TSA:
1527         default:
1528                 drop_packet(skb);
1529         }
1530 }
1531
1532 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1533         struct sk_buff *skb)
1534 {
1535         int err;
1536
1537         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1538         if (err)
1539                 active_open_err(cm_node, skb, 1);
1540
1541         return err;
1542 }
1543
1544 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1545         struct sk_buff *skb)
1546 {
1547         int err = 0;
1548         u32 seq;
1549         u32 ack_seq;
1550         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1551         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1552         u32 rcv_wnd;
1553         seq = ntohl(tcph->seq);
1554         ack_seq = ntohl(tcph->ack_seq);
1555         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1556         if (ack_seq != loc_seq_num)
1557                 err = 1;
1558         else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
1559                 err = 1;
1560         if (err) {
1561                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1562                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1563                         cm_node->listener, cm_node->state);
1564                 indicate_pkt_err(cm_node, skb);
1565                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1566                         "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1567                         rcv_wnd);
1568         }
1569         return err;
1570 }
1571
1572 /*
1573  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1574  * is created with a listener or it may comein as rexmitted packet which in
1575  * that case will be just dropped.
1576  */
1577
1578 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1579         struct tcphdr *tcph)
1580 {
1581         int ret;
1582         u32 inc_sequence;
1583         int optionsize;
1584
1585         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1586         skb_trim(skb, 0);
1587         inc_sequence = ntohl(tcph->seq);
1588
1589         switch (cm_node->state) {
1590         case NES_CM_STATE_SYN_SENT:
1591         case NES_CM_STATE_MPAREQ_SENT:
1592                 /* Rcvd syn on active open connection*/
1593                 active_open_err(cm_node, skb, 1);
1594                 break;
1595         case NES_CM_STATE_LISTENING:
1596                 /* Passive OPEN */
1597                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1598                                 cm_node->listener->backlog) {
1599                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
1600                                 "pressure \n");
1601                         cm_backlog_drops++;
1602                         passive_open_err(cm_node, skb, 0);
1603                         break;
1604                 }
1605                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1606                         1);
1607                 if (ret) {
1608                         passive_open_err(cm_node, skb, 0);
1609                         /* drop pkt */
1610                         break;
1611                 }
1612                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1613                 BUG_ON(cm_node->send_entry);
1614                 cm_node->accept_pend = 1;
1615                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1616
1617                 cm_node->state = NES_CM_STATE_SYN_RCVD;
1618                 send_syn(cm_node, 1, skb);
1619                 break;
1620         case NES_CM_STATE_CLOSED:
1621                 cleanup_retrans_entry(cm_node);
1622                 send_reset(cm_node, skb);
1623                 break;
1624         case NES_CM_STATE_TSA:
1625         case NES_CM_STATE_ESTABLISHED:
1626         case NES_CM_STATE_FIN_WAIT1:
1627         case NES_CM_STATE_FIN_WAIT2:
1628         case NES_CM_STATE_MPAREQ_RCVD:
1629         case NES_CM_STATE_LAST_ACK:
1630         case NES_CM_STATE_CLOSING:
1631         case NES_CM_STATE_UNKNOWN:
1632         default:
1633                 drop_packet(skb);
1634                 break;
1635         }
1636 }
1637
1638 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1639         struct tcphdr *tcph)
1640 {
1641
1642         int ret;
1643         u32 inc_sequence;
1644         int optionsize;
1645
1646         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1647         skb_trim(skb, 0);
1648         inc_sequence = ntohl(tcph->seq);
1649         switch (cm_node->state) {
1650         case NES_CM_STATE_SYN_SENT:
1651                 cleanup_retrans_entry(cm_node);
1652                 /* active open */
1653                 if (check_syn(cm_node, tcph, skb))
1654                         return;
1655                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1656                 /* setup options */
1657                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1658                 if (ret) {
1659                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1660                                 cm_node);
1661                         break;
1662                 }
1663                 cleanup_retrans_entry(cm_node);
1664                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1665                 send_mpa_request(cm_node, skb);
1666                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1667                 break;
1668         case NES_CM_STATE_MPAREQ_RCVD:
1669                 /* passive open, so should not be here */
1670                 passive_open_err(cm_node, skb, 1);
1671                 break;
1672         case NES_CM_STATE_LISTENING:
1673         case NES_CM_STATE_CLOSED:
1674                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1675                 cleanup_retrans_entry(cm_node);
1676                 send_reset(cm_node, skb);
1677                 break;
1678         case NES_CM_STATE_ESTABLISHED:
1679         case NES_CM_STATE_FIN_WAIT1:
1680         case NES_CM_STATE_FIN_WAIT2:
1681         case NES_CM_STATE_LAST_ACK:
1682         case NES_CM_STATE_TSA:
1683         case NES_CM_STATE_CLOSING:
1684         case NES_CM_STATE_UNKNOWN:
1685         case NES_CM_STATE_MPAREQ_SENT:
1686         default:
1687                 drop_packet(skb);
1688                 break;
1689         }
1690 }
1691
1692 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1693         struct tcphdr *tcph)
1694 {
1695         int datasize = 0;
1696         u32 inc_sequence;
1697         u32 rem_seq_ack;
1698         u32 rem_seq;
1699         int ret = 0;
1700         int optionsize;
1701         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1702
1703         if (check_seq(cm_node, tcph, skb))
1704                 return -EINVAL;
1705
1706         skb_pull(skb, tcph->doff << 2);
1707         inc_sequence = ntohl(tcph->seq);
1708         rem_seq = ntohl(tcph->seq);
1709         rem_seq_ack =  ntohl(tcph->ack_seq);
1710         datasize = skb->len;
1711         switch (cm_node->state) {
1712         case NES_CM_STATE_SYN_RCVD:
1713                 /* Passive OPEN */
1714                 cleanup_retrans_entry(cm_node);
1715                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1716                 if (ret)
1717                         break;
1718                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1719                 cm_node->state = NES_CM_STATE_ESTABLISHED;
1720                 if (datasize) {
1721                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1722                         handle_rcv_mpa(cm_node, skb);
1723                 } else  /* rcvd ACK only */
1724                         dev_kfree_skb_any(skb);
1725                 break;
1726         case NES_CM_STATE_ESTABLISHED:
1727                 /* Passive OPEN */
1728                 cleanup_retrans_entry(cm_node);
1729                 if (datasize) {
1730                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1731                         handle_rcv_mpa(cm_node, skb);
1732                 } else
1733                         drop_packet(skb);
1734                 break;
1735         case NES_CM_STATE_MPAREQ_SENT:
1736                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1737                 if (datasize) {
1738                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1739                         handle_rcv_mpa(cm_node, skb);
1740                 } else  /* Could be just an ack pkt.. */
1741                         dev_kfree_skb_any(skb);
1742                 break;
1743         case NES_CM_STATE_LISTENING:
1744         case NES_CM_STATE_CLOSED:
1745                 cleanup_retrans_entry(cm_node);
1746                 send_reset(cm_node, skb);
1747                 break;
1748         case NES_CM_STATE_LAST_ACK:
1749         case NES_CM_STATE_CLOSING:
1750                 cleanup_retrans_entry(cm_node);
1751                 cm_node->state = NES_CM_STATE_CLOSED;
1752                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1753                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1754                 drop_packet(skb);
1755                 break;
1756         case NES_CM_STATE_FIN_WAIT1:
1757                 cleanup_retrans_entry(cm_node);
1758                 drop_packet(skb);
1759                 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1760                 break;
1761         case NES_CM_STATE_SYN_SENT:
1762         case NES_CM_STATE_FIN_WAIT2:
1763         case NES_CM_STATE_TSA:
1764         case NES_CM_STATE_MPAREQ_RCVD:
1765         case NES_CM_STATE_UNKNOWN:
1766         default:
1767                 cleanup_retrans_entry(cm_node);
1768                 drop_packet(skb);
1769                 break;
1770         }
1771         return ret;
1772 }
1773
1774
1775
1776 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1777         struct sk_buff *skb, int optionsize, int passive)
1778 {
1779         u8 *optionsloc = (u8 *)&tcph[1];
1780         if (optionsize) {
1781                 if (process_options(cm_node, optionsloc, optionsize,
1782                         (u32)tcph->syn)) {
1783                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1784                                 __func__, cm_node);
1785                         if (passive)
1786                                 passive_open_err(cm_node, skb, 1);
1787                         else
1788                                 active_open_err(cm_node, skb, 1);
1789                         return 1;
1790                 }
1791         }
1792
1793         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1794                         cm_node->tcp_cntxt.snd_wscale;
1795
1796         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1797                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1798         return 0;
1799 }
1800
1801 /*
1802  * active_open_err() will send reset() if flag set..
1803  * It will also send ABORT event.
1804  */
1805
1806 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1807         int reset)
1808 {
1809         cleanup_retrans_entry(cm_node);
1810         if (reset) {
1811                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1812                                 "state=%d\n", cm_node, cm_node->state);
1813                 add_ref_cm_node(cm_node);
1814                 send_reset(cm_node, skb);
1815         } else
1816                 dev_kfree_skb_any(skb);
1817
1818         cm_node->state = NES_CM_STATE_CLOSED;
1819         create_event(cm_node, NES_CM_EVENT_ABORTED);
1820 }
1821
1822 /*
1823  * passive_open_err() will either do a reset() or will free up the skb and
1824  * remove the cm_node.
1825  */
1826
1827 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1828         int reset)
1829 {
1830         cleanup_retrans_entry(cm_node);
1831         cm_node->state = NES_CM_STATE_CLOSED;
1832         if (reset) {
1833                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1834                         "cm_node=%p state =%d\n", cm_node, cm_node->state);
1835                 send_reset(cm_node, skb);
1836         } else {
1837                 dev_kfree_skb_any(skb);
1838                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1839         }
1840 }
1841
1842 /*
1843  * free_retrans_entry() routines assumes that the retrans_list_lock has
1844  * been acquired before calling.
1845  */
1846 static void free_retrans_entry(struct nes_cm_node *cm_node)
1847 {
1848         struct nes_timer_entry *send_entry;
1849         send_entry = cm_node->send_entry;
1850         if (send_entry) {
1851                 cm_node->send_entry = NULL;
1852                 dev_kfree_skb_any(send_entry->skb);
1853                 kfree(send_entry);
1854                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1855         }
1856 }
1857
1858 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1859 {
1860         unsigned long flags;
1861
1862         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1863         free_retrans_entry(cm_node);
1864         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1865 }
1866
1867 /**
1868  * process_packet
1869  * Returns skb if to be freed, else it will return NULL if already used..
1870  */
1871 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1872         struct nes_cm_core *cm_core)
1873 {
1874         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1875         struct tcphdr *tcph = tcp_hdr(skb);
1876         u32     fin_set = 0;
1877         int ret = 0;
1878         skb_pull(skb, ip_hdr(skb)->ihl << 2);
1879
1880         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1881                 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1882                 tcph->ack, tcph->rst, tcph->fin);
1883
1884         if (tcph->rst)
1885                 pkt_type = NES_PKT_TYPE_RST;
1886         else if (tcph->syn) {
1887                 pkt_type = NES_PKT_TYPE_SYN;
1888                 if (tcph->ack)
1889                         pkt_type = NES_PKT_TYPE_SYNACK;
1890         } else if (tcph->ack)
1891                 pkt_type = NES_PKT_TYPE_ACK;
1892         if (tcph->fin)
1893                 fin_set = 1;
1894
1895         switch (pkt_type) {
1896         case NES_PKT_TYPE_SYN:
1897                 handle_syn_pkt(cm_node, skb, tcph);
1898                 break;
1899         case NES_PKT_TYPE_SYNACK:
1900                 handle_synack_pkt(cm_node, skb, tcph);
1901                 break;
1902         case NES_PKT_TYPE_ACK:
1903                 ret = handle_ack_pkt(cm_node, skb, tcph);
1904                 if (fin_set && !ret)
1905                         handle_fin_pkt(cm_node);
1906                 break;
1907         case NES_PKT_TYPE_RST:
1908                 handle_rst_pkt(cm_node, skb, tcph);
1909                 break;
1910         default:
1911                 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
1912                         handle_fin_pkt(cm_node);
1913                 drop_packet(skb);
1914                 break;
1915         }
1916 }
1917
1918 /**
1919  * mini_cm_listen - create a listen node with params
1920  */
1921 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1922         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1923 {
1924         struct nes_cm_listener *listener;
1925         unsigned long flags;
1926
1927         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1928                 cm_info->loc_addr, cm_info->loc_port);
1929
1930         /* cannot have multiple matching listeners */
1931         listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1932                         htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1933         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1934                 /* find automatically incs ref count ??? */
1935                 atomic_dec(&listener->ref_count);
1936                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1937                 return NULL;
1938         }
1939
1940         if (!listener) {
1941                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1942                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1943                 if (!listener) {
1944                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1945                         return NULL;
1946                 }
1947
1948                 listener->loc_addr = htonl(cm_info->loc_addr);
1949                 listener->loc_port = htons(cm_info->loc_port);
1950                 listener->reused_node = 0;
1951
1952                 atomic_set(&listener->ref_count, 1);
1953         }
1954         /* pasive case */
1955         /* find already inc'ed the ref count */
1956         else {
1957                 listener->reused_node = 1;
1958         }
1959
1960         listener->cm_id = cm_info->cm_id;
1961         atomic_set(&listener->pend_accepts_cnt, 0);
1962         listener->cm_core = cm_core;
1963         listener->nesvnic = nesvnic;
1964         atomic_inc(&cm_core->node_cnt);
1965
1966         listener->conn_type = cm_info->conn_type;
1967         listener->backlog = cm_info->backlog;
1968         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1969
1970         if (!listener->reused_node) {
1971                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1972                 list_add(&listener->list, &cm_core->listen_list.list);
1973                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1974                 atomic_inc(&cm_core->listen_node_cnt);
1975         }
1976
1977         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1978                         " listener = %p, backlog = %d, cm_id = %p.\n",
1979                         cm_info->loc_addr, cm_info->loc_port,
1980                         listener, listener->backlog, listener->cm_id);
1981
1982         return listener;
1983 }
1984
1985
1986 /**
1987  * mini_cm_connect - make a connection node with params
1988  */
1989 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1990         struct nes_vnic *nesvnic, u16 private_data_len,
1991         void *private_data, struct nes_cm_info *cm_info)
1992 {
1993         int ret = 0;
1994         struct nes_cm_node *cm_node;
1995         struct nes_cm_listener *loopbackremotelistener;
1996         struct nes_cm_node *loopbackremotenode;
1997         struct nes_cm_info loopback_cm_info;
1998         u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
1999         struct ietf_mpa_frame *mpa_frame = NULL;
2000
2001         /* create a CM connection node */
2002         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2003         if (!cm_node)
2004                 return NULL;
2005         mpa_frame = &cm_node->mpa_frame;
2006         memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
2007         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2008         mpa_frame->rev =  IETF_MPA_VERSION;
2009         mpa_frame->priv_data_len = htons(private_data_len);
2010
2011         /* set our node side to client (active) side */
2012         cm_node->tcp_cntxt.client = 1;
2013         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2014
2015         if (cm_info->loc_addr == cm_info->rem_addr) {
2016                 loopbackremotelistener = find_listener(cm_core,
2017                                 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2018                                 NES_CM_LISTENER_ACTIVE_STATE);
2019                 if (loopbackremotelistener == NULL) {
2020                         create_event(cm_node, NES_CM_EVENT_ABORTED);
2021                 } else {
2022                         loopback_cm_info = *cm_info;
2023                         loopback_cm_info.loc_port = cm_info->rem_port;
2024                         loopback_cm_info.rem_port = cm_info->loc_port;
2025                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2026                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
2027                                 &loopback_cm_info, loopbackremotelistener);
2028                         if (!loopbackremotenode) {
2029                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2030                                 return NULL;
2031                         }
2032                         atomic_inc(&cm_loopbacks);
2033                         loopbackremotenode->loopbackpartner = cm_node;
2034                         loopbackremotenode->tcp_cntxt.rcv_wscale =
2035                                 NES_CM_DEFAULT_RCV_WND_SCALE;
2036                         cm_node->loopbackpartner = loopbackremotenode;
2037                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2038                                 private_data_len);
2039                         loopbackremotenode->mpa_frame_size = private_data_len;
2040
2041                         /* we are done handling this state. */
2042                         /* set node to a TSA state */
2043                         cm_node->state = NES_CM_STATE_TSA;
2044                         cm_node->tcp_cntxt.rcv_nxt =
2045                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
2046                         loopbackremotenode->tcp_cntxt.rcv_nxt =
2047                                 cm_node->tcp_cntxt.loc_seq_num;
2048                         cm_node->tcp_cntxt.max_snd_wnd =
2049                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2050                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
2051                                 cm_node->tcp_cntxt.rcv_wnd;
2052                         cm_node->tcp_cntxt.snd_wnd =
2053                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2054                         loopbackremotenode->tcp_cntxt.snd_wnd =
2055                                 cm_node->tcp_cntxt.rcv_wnd;
2056                         cm_node->tcp_cntxt.snd_wscale =
2057                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
2058                         loopbackremotenode->tcp_cntxt.snd_wscale =
2059                                 cm_node->tcp_cntxt.rcv_wscale;
2060                         loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2061                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2062                 }
2063                 return cm_node;
2064         }
2065
2066         /* set our node side to client (active) side */
2067         cm_node->tcp_cntxt.client = 1;
2068         /* init our MPA frame ptr */
2069         memcpy(mpa_frame->priv_data, private_data, private_data_len);
2070
2071         cm_node->mpa_frame_size = mpa_frame_size;
2072
2073         /* send a syn and goto syn sent state */
2074         cm_node->state = NES_CM_STATE_SYN_SENT;
2075         ret = send_syn(cm_node, 0, NULL);
2076
2077         if (ret) {
2078                 /* error in sending the syn free up the cm_node struct */
2079                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2080                         "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2081                         cm_node->rem_addr, cm_node->rem_port, cm_node,
2082                         cm_node->cm_id);
2083                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2084                 cm_node = NULL;
2085         }
2086
2087         if (cm_node)
2088                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2089                         "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2090                         cm_node->rem_addr, cm_node->rem_port, cm_node,
2091                         cm_node->cm_id);
2092
2093         return cm_node;
2094 }
2095
2096
2097 /**
2098  * mini_cm_accept - accept a connection
2099  * This function is never called
2100  */
2101 static int mini_cm_accept(struct nes_cm_core *cm_core,
2102         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2103 {
2104         return 0;
2105 }
2106
2107
2108 /**
2109  * mini_cm_reject - reject and teardown a connection
2110  */
2111 static int mini_cm_reject(struct nes_cm_core *cm_core,
2112         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2113 {
2114         int ret = 0;
2115         int err = 0;
2116         int passive_state;
2117         struct nes_cm_event event;
2118         struct iw_cm_id *cm_id = cm_node->cm_id;
2119         struct nes_cm_node *loopback = cm_node->loopbackpartner;
2120
2121         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2122                 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2123
2124         if (cm_node->tcp_cntxt.client)
2125                 return ret;
2126         cleanup_retrans_entry(cm_node);
2127
2128         if (!loopback) {
2129                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2130                 if (passive_state == NES_SEND_RESET_EVENT) {
2131                         cm_node->state = NES_CM_STATE_CLOSED;
2132                         rem_ref_cm_node(cm_core, cm_node);
2133                 } else {
2134                         ret = send_mpa_reject(cm_node);
2135                         if (ret) {
2136                                 cm_node->state = NES_CM_STATE_CLOSED;
2137                                 err = send_reset(cm_node, NULL);
2138                                 if (err)
2139                                         WARN_ON(1);
2140                         } else
2141                                 cm_id->add_ref(cm_id);
2142                 }
2143         } else {
2144                 cm_node->cm_id = NULL;
2145                 event.cm_node = loopback;
2146                 event.cm_info.rem_addr = loopback->rem_addr;
2147                 event.cm_info.loc_addr = loopback->loc_addr;
2148                 event.cm_info.rem_port = loopback->rem_port;
2149                 event.cm_info.loc_port = loopback->loc_port;
2150                 event.cm_info.cm_id = loopback->cm_id;
2151                 cm_event_mpa_reject(&event);
2152                 rem_ref_cm_node(cm_core, cm_node);
2153                 loopback->state = NES_CM_STATE_CLOSING;
2154
2155                 cm_id = loopback->cm_id;
2156                 rem_ref_cm_node(cm_core, loopback);
2157                 cm_id->rem_ref(cm_id);
2158         }
2159
2160         return ret;
2161 }
2162
2163
2164 /**
2165  * mini_cm_close
2166  */
2167 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2168 {
2169         int ret = 0;
2170
2171         if (!cm_core || !cm_node)
2172                 return -EINVAL;
2173
2174         switch (cm_node->state) {
2175         case NES_CM_STATE_SYN_RCVD:
2176         case NES_CM_STATE_SYN_SENT:
2177         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2178         case NES_CM_STATE_ESTABLISHED:
2179         case NES_CM_STATE_ACCEPTING:
2180         case NES_CM_STATE_MPAREQ_SENT:
2181         case NES_CM_STATE_MPAREQ_RCVD:
2182                 cleanup_retrans_entry(cm_node);
2183                 send_reset(cm_node, NULL);
2184                 break;
2185         case NES_CM_STATE_CLOSE_WAIT:
2186                 cm_node->state = NES_CM_STATE_LAST_ACK;
2187                 send_fin(cm_node, NULL);
2188                 break;
2189         case NES_CM_STATE_FIN_WAIT1:
2190         case NES_CM_STATE_FIN_WAIT2:
2191         case NES_CM_STATE_LAST_ACK:
2192         case NES_CM_STATE_TIME_WAIT:
2193         case NES_CM_STATE_CLOSING:
2194                 ret = -1;
2195                 break;
2196         case NES_CM_STATE_MPAREJ_RCVD:
2197         case NES_CM_STATE_LISTENING:
2198         case NES_CM_STATE_UNKNOWN:
2199         case NES_CM_STATE_INITED:
2200         case NES_CM_STATE_CLOSED:
2201                 ret = rem_ref_cm_node(cm_core, cm_node);
2202                 break;
2203         case NES_CM_STATE_TSA:
2204                 if (cm_node->send_entry)
2205                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2206                                 "send_entry=%p\n", cm_node->send_entry);
2207                 ret = rem_ref_cm_node(cm_core, cm_node);
2208                 break;
2209         }
2210         return ret;
2211 }
2212
2213
2214 /**
2215  * recv_pkt - recv an ETHERNET packet, and process it through CM
2216  * node state machine
2217  */
2218 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2219         struct nes_vnic *nesvnic, struct sk_buff *skb)
2220 {
2221         struct nes_cm_node *cm_node = NULL;
2222         struct nes_cm_listener *listener = NULL;
2223         struct iphdr *iph;
2224         struct tcphdr *tcph;
2225         struct nes_cm_info nfo;
2226         int skb_handled = 1;
2227         __be32 tmp_daddr, tmp_saddr;
2228
2229         if (!skb)
2230                 return 0;
2231         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2232                 return 0;
2233         }
2234
2235         iph = (struct iphdr *)skb->data;
2236         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2237
2238         nfo.loc_addr = ntohl(iph->daddr);
2239         nfo.loc_port = ntohs(tcph->dest);
2240         nfo.rem_addr = ntohl(iph->saddr);
2241         nfo.rem_port = ntohs(tcph->source);
2242
2243         tmp_daddr = cpu_to_be32(iph->daddr);
2244         tmp_saddr = cpu_to_be32(iph->saddr);
2245
2246         nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2247                   &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2248
2249         do {
2250                 cm_node = find_node(cm_core,
2251                         nfo.rem_port, nfo.rem_addr,
2252                         nfo.loc_port, nfo.loc_addr);
2253
2254                 if (!cm_node) {
2255                         /* Only type of packet accepted are for */
2256                         /* the PASSIVE open (syn only) */
2257                         if ((!tcph->syn) || (tcph->ack)) {
2258                                 skb_handled = 0;
2259                                 break;
2260                         }
2261                         listener = find_listener(cm_core, nfo.loc_addr,
2262                                 nfo.loc_port,
2263                                 NES_CM_LISTENER_ACTIVE_STATE);
2264                         if (!listener) {
2265                                 nfo.cm_id = NULL;
2266                                 nfo.conn_type = 0;
2267                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2268                                 skb_handled = 0;
2269                                 break;
2270                         }
2271                         nfo.cm_id = listener->cm_id;
2272                         nfo.conn_type = listener->conn_type;
2273                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2274                                 listener);
2275                         if (!cm_node) {
2276                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2277                                         "node\n");
2278                                 cm_packets_dropped++;
2279                                 atomic_dec(&listener->ref_count);
2280                                 dev_kfree_skb_any(skb);
2281                                 break;
2282                         }
2283                         if (!tcph->rst && !tcph->fin) {
2284                                 cm_node->state = NES_CM_STATE_LISTENING;
2285                         } else {
2286                                 cm_packets_dropped++;
2287                                 rem_ref_cm_node(cm_core, cm_node);
2288                                 dev_kfree_skb_any(skb);
2289                                 break;
2290                         }
2291                         add_ref_cm_node(cm_node);
2292                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2293                         rem_ref_cm_node(cm_core, cm_node);
2294                         atomic_inc(&cm_accel_dropped_pkts);
2295                         dev_kfree_skb_any(skb);
2296                         break;
2297                 }
2298                 skb_reset_network_header(skb);
2299                 skb_set_transport_header(skb, sizeof(*tcph));
2300                 skb->len = ntohs(iph->tot_len);
2301                 process_packet(cm_node, skb, cm_core);
2302                 rem_ref_cm_node(cm_core, cm_node);
2303         } while (0);
2304         return skb_handled;
2305 }
2306
2307
2308 /**
2309  * nes_cm_alloc_core - allocate a top level instance of a cm core
2310  */
2311 static struct nes_cm_core *nes_cm_alloc_core(void)
2312 {
2313         struct nes_cm_core *cm_core;
2314
2315         /* setup the CM core */
2316         /* alloc top level core control structure */
2317         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2318         if (!cm_core)
2319                 return NULL;
2320
2321         INIT_LIST_HEAD(&cm_core->connected_nodes);
2322         init_timer(&cm_core->tcp_timer);
2323         cm_core->tcp_timer.function = nes_cm_timer_tick;
2324
2325         cm_core->mtu   = NES_CM_DEFAULT_MTU;
2326         cm_core->state = NES_CM_STATE_INITED;
2327         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2328
2329         atomic_set(&cm_core->events_posted, 0);
2330
2331         cm_core->api = &nes_cm_api;
2332
2333         spin_lock_init(&cm_core->ht_lock);
2334         spin_lock_init(&cm_core->listen_list_lock);
2335
2336         INIT_LIST_HEAD(&cm_core->listen_list.list);
2337
2338         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2339
2340         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2341         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2342         cm_core->post_event = nes_cm_post_event;
2343         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2344         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2345
2346         print_core(cm_core);
2347         return cm_core;
2348 }
2349
2350
2351 /**
2352  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2353  */
2354 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2355 {
2356         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2357
2358         if (!cm_core)
2359                 return -EINVAL;
2360
2361         barrier();
2362
2363         if (timer_pending(&cm_core->tcp_timer)) {
2364                 del_timer(&cm_core->tcp_timer);
2365         }
2366
2367         destroy_workqueue(cm_core->event_wq);
2368         destroy_workqueue(cm_core->disconn_wq);
2369         nes_debug(NES_DBG_CM, "\n");
2370         kfree(cm_core);
2371
2372         return 0;
2373 }
2374
2375
2376 /**
2377  * mini_cm_get
2378  */
2379 static int mini_cm_get(struct nes_cm_core *cm_core)
2380 {
2381         return cm_core->state;
2382 }
2383
2384
2385 /**
2386  * mini_cm_set
2387  */
2388 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2389 {
2390         int ret = 0;
2391
2392         switch (type) {
2393         case NES_CM_SET_PKT_SIZE:
2394                 cm_core->mtu = value;
2395                 break;
2396         case NES_CM_SET_FREE_PKT_Q_SIZE:
2397                 cm_core->free_tx_pkt_max = value;
2398                 break;
2399         default:
2400                 /* unknown set option */
2401                 ret = -EINVAL;
2402         }
2403
2404         return ret;
2405 }
2406
2407
2408 /**
2409  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2410  * successfully exchanged when this is called
2411  */
2412 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2413 {
2414         int ret = 0;
2415
2416         if (!nesqp)
2417                 return -EINVAL;
2418
2419         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2420                         NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2421                         NES_QPCONTEXT_MISC_DROS);
2422
2423         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2424                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2425
2426         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2427
2428         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2429
2430         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2431                         (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2432
2433         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2434                         (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2435                         NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2436
2437         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2438                         (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2439                         NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2440
2441         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2442         nesqp->nesqp_context->ts_recent = 0;
2443         nesqp->nesqp_context->ts_age = 0;
2444         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2445         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2446         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2447         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2448                         cm_node->tcp_cntxt.rcv_wscale);
2449         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2450         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2451         nesqp->nesqp_context->srtt = 0;
2452         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2453         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2454         nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2455         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2456         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2457         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2458
2459         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2460                         " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2461                         nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2462                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2463                         cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2464                         le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2465                         le32_to_cpu(nesqp->nesqp_context->misc));
2466         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2467         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2468         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2469
2470         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2471         cm_node->state = NES_CM_STATE_TSA;
2472
2473         return ret;
2474 }
2475
2476
2477 /**
2478  * nes_cm_disconn
2479  */
2480 int nes_cm_disconn(struct nes_qp *nesqp)
2481 {
2482         struct disconn_work *work;
2483
2484         work = kzalloc(sizeof *work, GFP_ATOMIC);
2485         if (!work)
2486                 return -ENOMEM; /* Timer will clean up */
2487
2488         nes_add_ref(&nesqp->ibqp);
2489         work->nesqp = nesqp;
2490         INIT_WORK(&work->work, nes_disconnect_worker);
2491         queue_work(g_cm_core->disconn_wq, &work->work);
2492         return 0;
2493 }
2494
2495
2496 /**
2497  * nes_disconnect_worker
2498  */
2499 static void nes_disconnect_worker(struct work_struct *work)
2500 {
2501         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2502         struct nes_qp *nesqp = dwork->nesqp;
2503
2504         kfree(dwork);
2505         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2506                         nesqp->last_aeq, nesqp->hwqp.qp_id);
2507         nes_cm_disconn_true(nesqp);
2508         nes_rem_ref(&nesqp->ibqp);
2509 }
2510
2511
2512 /**
2513  * nes_cm_disconn_true
2514  */
2515 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2516 {
2517         unsigned long flags;
2518         int ret = 0;
2519         struct iw_cm_id *cm_id;
2520         struct iw_cm_event cm_event;
2521         struct nes_vnic *nesvnic;
2522         u16 last_ae;
2523         u8 original_hw_tcp_state;
2524         u8 original_ibqp_state;
2525         enum iw_cm_event_type disconn_status = IW_CM_EVENT_STATUS_OK;
2526         int issue_disconn = 0;
2527         int issue_close = 0;
2528         int issue_flush = 0;
2529         u32 flush_q = NES_CQP_FLUSH_RQ;
2530         struct ib_event ibevent;
2531
2532         if (!nesqp) {
2533                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2534                 return -1;
2535         }
2536
2537         spin_lock_irqsave(&nesqp->lock, flags);
2538         cm_id = nesqp->cm_id;
2539         /* make sure we havent already closed this connection */
2540         if (!cm_id) {
2541                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2542                                 nesqp->hwqp.qp_id);
2543                 spin_unlock_irqrestore(&nesqp->lock, flags);
2544                 return -1;
2545         }
2546
2547         nesvnic = to_nesvnic(nesqp->ibqp.device);
2548         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2549
2550         original_hw_tcp_state = nesqp->hw_tcp_state;
2551         original_ibqp_state   = nesqp->ibqp_state;
2552         last_ae = nesqp->last_aeq;
2553
2554         if (nesqp->term_flags) {
2555                 issue_disconn = 1;
2556                 issue_close = 1;
2557                 nesqp->cm_id = NULL;
2558                 if (nesqp->flush_issued == 0) {
2559                         nesqp->flush_issued = 1;
2560                         issue_flush = 1;
2561                 }
2562         } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2563                         ((original_ibqp_state == IB_QPS_RTS) &&
2564                         (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2565                 issue_disconn = 1;
2566                 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2567                         disconn_status = IW_CM_EVENT_STATUS_RESET;
2568         }
2569
2570         if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2571                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2572                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2573                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2574                 issue_close = 1;
2575                 nesqp->cm_id = NULL;
2576                 if (nesqp->flush_issued == 0) {
2577                         nesqp->flush_issued = 1;
2578                         issue_flush = 1;
2579                 }
2580         }
2581
2582         spin_unlock_irqrestore(&nesqp->lock, flags);
2583
2584         if ((issue_flush) && (nesqp->destroyed == 0)) {
2585                 /* Flush the queue(s) */
2586                 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2587                         flush_q |= NES_CQP_FLUSH_SQ;
2588                 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2589
2590                 if (nesqp->term_flags) {
2591                         ibevent.device = nesqp->ibqp.device;
2592                         ibevent.event = nesqp->terminate_eventtype;
2593                         ibevent.element.qp = &nesqp->ibqp;
2594                         nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2595                 }
2596         }
2597
2598         if ((cm_id) && (cm_id->event_handler)) {
2599                 if (issue_disconn) {
2600                         atomic_inc(&cm_disconnects);
2601                         cm_event.event = IW_CM_EVENT_DISCONNECT;
2602                         cm_event.status = disconn_status;
2603                         cm_event.local_addr = cm_id->local_addr;
2604                         cm_event.remote_addr = cm_id->remote_addr;
2605                         cm_event.private_data = NULL;
2606                         cm_event.private_data_len = 0;
2607
2608                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2609                                 " for  QP%u, SQ Head = %u, SQ Tail = %u. "
2610                                 "cm_id = %p, refcount = %u.\n",
2611                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2612                                 nesqp->hwqp.sq_tail, cm_id,
2613                                 atomic_read(&nesqp->refcount));
2614
2615                         ret = cm_id->event_handler(cm_id, &cm_event);
2616                         if (ret)
2617                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2618                                         "returned, ret=%d\n", ret);
2619                 }
2620
2621                 if (issue_close) {
2622                         atomic_inc(&cm_closes);
2623                         nes_disconnect(nesqp, 1);
2624
2625                         cm_id->provider_data = nesqp;
2626                         /* Send up the close complete event */
2627                         cm_event.event = IW_CM_EVENT_CLOSE;
2628                         cm_event.status = IW_CM_EVENT_STATUS_OK;
2629                         cm_event.provider_data = cm_id->provider_data;
2630                         cm_event.local_addr = cm_id->local_addr;
2631                         cm_event.remote_addr = cm_id->remote_addr;
2632                         cm_event.private_data = NULL;
2633                         cm_event.private_data_len = 0;
2634
2635                         ret = cm_id->event_handler(cm_id, &cm_event);
2636                         if (ret) {
2637                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2638                         }
2639
2640                         cm_id->rem_ref(cm_id);
2641                 }
2642         }
2643
2644         return 0;
2645 }
2646
2647
2648 /**
2649  * nes_disconnect
2650  */
2651 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2652 {
2653         int ret = 0;
2654         struct nes_vnic *nesvnic;
2655         struct nes_device *nesdev;
2656         struct nes_ib_device *nesibdev;
2657
2658         nesvnic = to_nesvnic(nesqp->ibqp.device);
2659         if (!nesvnic)
2660                 return -EINVAL;
2661
2662         nesdev = nesvnic->nesdev;
2663         nesibdev = nesvnic->nesibdev;
2664
2665         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2666                         atomic_read(&nesvnic->netdev->refcnt));
2667
2668         if (nesqp->active_conn) {
2669
2670                 /* indicate this connection is NOT active */
2671                 nesqp->active_conn = 0;
2672         } else {
2673                 /* Need to free the Last Streaming Mode Message */
2674                 if (nesqp->ietf_frame) {
2675                         if (nesqp->lsmm_mr)
2676                                 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2677                         pci_free_consistent(nesdev->pcidev,
2678                                         nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2679                                         nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2680                 }
2681         }
2682
2683         /* close the CM node down if it is still active */
2684         if (nesqp->cm_node) {
2685                 nes_debug(NES_DBG_CM, "Call close API\n");
2686
2687                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2688         }
2689
2690         return ret;
2691 }
2692
2693
2694 /**
2695  * nes_accept
2696  */
2697 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2698 {
2699         u64 u64temp;
2700         struct ib_qp *ibqp;
2701         struct nes_qp *nesqp;
2702         struct nes_vnic *nesvnic;
2703         struct nes_device *nesdev;
2704         struct nes_cm_node *cm_node;
2705         struct nes_adapter *adapter;
2706         struct ib_qp_attr attr;
2707         struct iw_cm_event cm_event;
2708         struct nes_hw_qp_wqe *wqe;
2709         struct nes_v4_quad nes_quad;
2710         u32 crc_value;
2711         int ret;
2712         int passive_state;
2713         struct nes_ib_device *nesibdev;
2714         struct ib_mr *ibmr = NULL;
2715         struct ib_phys_buf ibphysbuf;
2716         struct nes_pd *nespd;
2717         u64 tagged_offset;
2718
2719
2720
2721         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2722         if (!ibqp)
2723                 return -EINVAL;
2724
2725         /* get all our handles */
2726         nesqp = to_nesqp(ibqp);
2727         nesvnic = to_nesvnic(nesqp->ibqp.device);
2728         nesdev = nesvnic->nesdev;
2729         adapter = nesdev->nesadapter;
2730
2731         cm_node = (struct nes_cm_node *)cm_id->provider_data;
2732         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2733                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2734                 nesvnic->netdev->name);
2735
2736         /* associate the node with the QP */
2737         nesqp->cm_node = (void *)cm_node;
2738         cm_node->nesqp = nesqp;
2739
2740         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2741                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2742         atomic_inc(&cm_accepts);
2743
2744         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2745                         atomic_read(&nesvnic->netdev->refcnt));
2746
2747         /* allocate the ietf frame and space for private data */
2748         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2749                 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2750                 &nesqp->ietf_frame_pbase);
2751
2752         if (!nesqp->ietf_frame) {
2753                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2754                         "data\n");
2755                 return -ENOMEM;
2756         }
2757
2758
2759         /* setup the MPA frame */
2760         nesqp->private_data_len = conn_param->private_data_len;
2761         memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2762
2763         memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2764                         conn_param->private_data_len);
2765
2766         nesqp->ietf_frame->priv_data_len =
2767                 cpu_to_be16(conn_param->private_data_len);
2768         nesqp->ietf_frame->rev = mpa_version;
2769         nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2770
2771         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2772         wqe = &nesqp->hwqp.sq_vbase[0];
2773
2774         if (cm_id->remote_addr.sin_addr.s_addr !=
2775                         cm_id->local_addr.sin_addr.s_addr) {
2776                 u64temp = (unsigned long)nesqp;
2777                 nesibdev = nesvnic->nesibdev;
2778                 nespd = nesqp->nespd;
2779                 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2780                 ibphysbuf.size = conn_param->private_data_len +
2781                                         sizeof(struct ietf_mpa_frame);
2782                 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
2783                 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2784                                                 &ibphysbuf, 1,
2785                                                 IB_ACCESS_LOCAL_WRITE,
2786                                                 &tagged_offset);
2787                 if (!ibmr) {
2788                         nes_debug(NES_DBG_CM, "Unable to register memory region"
2789                                         "for lSMM for cm_node = %p \n",
2790                                         cm_node);
2791                         pci_free_consistent(nesdev->pcidev,
2792                                 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2793                                 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2794                         return -ENOMEM;
2795                 }
2796
2797                 ibmr->pd = &nespd->ibpd;
2798                 ibmr->device = nespd->ibpd.device;
2799                 nesqp->lsmm_mr = ibmr;
2800
2801                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2802                 set_wqe_64bit_value(wqe->wqe_words,
2803                         NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2804                         u64temp);
2805                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2806                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2807                         NES_IWARP_SQ_WQE_WRPDU);
2808                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2809                         cpu_to_le32(conn_param->private_data_len +
2810                         sizeof(struct ietf_mpa_frame));
2811                 set_wqe_64bit_value(wqe->wqe_words,
2812                                         NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
2813                                         (u64)(unsigned long)nesqp->ietf_frame);
2814                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2815                         cpu_to_le32(conn_param->private_data_len +
2816                         sizeof(struct ietf_mpa_frame));
2817                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
2818
2819                 nesqp->nesqp_context->ird_ord_sizes |=
2820                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2821                         NES_QPCONTEXT_ORDIRD_WRPDU);
2822         } else {
2823                 nesqp->nesqp_context->ird_ord_sizes |=
2824                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
2825         }
2826         nesqp->skip_lsmm = 1;
2827
2828
2829         /* Cache the cm_id in the qp */
2830         nesqp->cm_id = cm_id;
2831         cm_node->cm_id = cm_id;
2832
2833         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
2834         cm_id->provider_data = nesqp;
2835         nesqp->active_conn   = 0;
2836
2837         if (cm_node->state == NES_CM_STATE_TSA)
2838                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2839                         cm_node);
2840
2841         nes_cm_init_tsa_conn(nesqp, cm_node);
2842
2843         nesqp->nesqp_context->tcpPorts[0] =
2844                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2845         nesqp->nesqp_context->tcpPorts[1] =
2846                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2847
2848         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2849                 nesqp->nesqp_context->ip0 =
2850                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2851         else
2852                 nesqp->nesqp_context->ip0 =
2853                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2854
2855         nesqp->nesqp_context->misc2 |= cpu_to_le32(
2856                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2857                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2858
2859         nesqp->nesqp_context->arp_index_vlan |=
2860                 cpu_to_le32(nes_arp_table(nesdev,
2861                         le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2862                         NES_ARP_RESOLVE) << 16);
2863
2864         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2865                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2866
2867         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2868
2869         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2870                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2871         nesqp->nesqp_context->ird_ord_sizes |=
2872                 cpu_to_le32((u32)conn_param->ord);
2873
2874         memset(&nes_quad, 0, sizeof(nes_quad));
2875         nes_quad.DstIpAdrIndex =
2876                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2877         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2878                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2879         else
2880                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2881         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2882         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2883
2884         /* Produce hash key */
2885         crc_value = get_crc_value(&nes_quad);
2886         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2887         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2888                 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2889
2890         nesqp->hte_index &= adapter->hte_index_mask;
2891         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2892
2893         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2894
2895         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2896                         "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2897                         "private data length=%zu.\n", nesqp->hwqp.qp_id,
2898                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
2899                         ntohs(cm_id->remote_addr.sin_port),
2900                         ntohl(cm_id->local_addr.sin_addr.s_addr),
2901                         ntohs(cm_id->local_addr.sin_port),
2902                         le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2903                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2904                         conn_param->private_data_len +
2905                         sizeof(struct ietf_mpa_frame));
2906
2907
2908         /* notify OF layer that accept event was successful */
2909         cm_id->add_ref(cm_id);
2910         nes_add_ref(&nesqp->ibqp);
2911
2912         cm_event.event = IW_CM_EVENT_ESTABLISHED;
2913         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2914         cm_event.provider_data = (void *)nesqp;
2915         cm_event.local_addr = cm_id->local_addr;
2916         cm_event.remote_addr = cm_id->remote_addr;
2917         cm_event.private_data = NULL;
2918         cm_event.private_data_len = 0;
2919         ret = cm_id->event_handler(cm_id, &cm_event);
2920         attr.qp_state = IB_QPS_RTS;
2921         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2922         if (cm_node->loopbackpartner) {
2923                 cm_node->loopbackpartner->mpa_frame_size =
2924                         nesqp->private_data_len;
2925                 /* copy entire MPA frame to our cm_node's frame */
2926                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2927                         nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2928                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2929         }
2930         if (ret)
2931                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2932                         "ret=%d\n", __func__, __LINE__, ret);
2933
2934         passive_state = atomic_add_return(1, &cm_node->passive_state);
2935         if (passive_state == NES_SEND_RESET_EVENT)
2936                 create_event(cm_node, NES_CM_EVENT_RESET);
2937         return 0;
2938 }
2939
2940
2941 /**
2942  * nes_reject
2943  */
2944 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2945 {
2946         struct nes_cm_node *cm_node;
2947         struct nes_cm_node *loopback;
2948
2949         struct nes_cm_core *cm_core;
2950
2951         atomic_inc(&cm_rejects);
2952         cm_node = (struct nes_cm_node *) cm_id->provider_data;
2953         loopback = cm_node->loopbackpartner;
2954         cm_core = cm_node->cm_core;
2955         cm_node->cm_id = cm_id;
2956         cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2957
2958         if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
2959                 return -EINVAL;
2960
2961         memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2962         if (loopback) {
2963                 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
2964                 loopback->mpa_frame.priv_data_len = pdata_len;
2965                 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
2966                                 pdata_len;
2967         } else {
2968                 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2969                 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2970         }
2971
2972         cm_node->mpa_frame.rev = mpa_version;
2973         cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2974
2975         return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2976 }
2977
2978
2979 /**
2980  * nes_connect
2981  * setup and launch cm connect node
2982  */
2983 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2984 {
2985         struct ib_qp *ibqp;
2986         struct nes_qp *nesqp;
2987         struct nes_vnic *nesvnic;
2988         struct nes_device *nesdev;
2989         struct nes_cm_node *cm_node;
2990         struct nes_cm_info cm_info;
2991         int apbvt_set = 0;
2992
2993         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2994         if (!ibqp)
2995                 return -EINVAL;
2996         nesqp = to_nesqp(ibqp);
2997         if (!nesqp)
2998                 return -EINVAL;
2999         nesvnic = to_nesvnic(nesqp->ibqp.device);
3000         if (!nesvnic)
3001                 return -EINVAL;
3002         nesdev  = nesvnic->nesdev;
3003         if (!nesdev)
3004                 return -EINVAL;
3005
3006         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3007                 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3008                 ntohl(nesvnic->local_ipaddr),
3009                 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3010                 ntohs(cm_id->remote_addr.sin_port),
3011                 ntohl(cm_id->local_addr.sin_addr.s_addr),
3012                 ntohs(cm_id->local_addr.sin_port));
3013
3014         atomic_inc(&cm_connects);
3015         nesqp->active_conn = 1;
3016
3017         /* cache the cm_id in the qp */
3018         nesqp->cm_id = cm_id;
3019
3020         cm_id->provider_data = nesqp;
3021
3022         nesqp->private_data_len = conn_param->private_data_len;
3023         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3024         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3025         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3026                 conn_param->private_data_len);
3027
3028         if (cm_id->local_addr.sin_addr.s_addr !=
3029                 cm_id->remote_addr.sin_addr.s_addr) {
3030                 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3031                         PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3032                 apbvt_set = 1;
3033         }
3034
3035         /* set up the connection params for the node */
3036         cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3037         cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3038         cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3039         cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3040         cm_info.cm_id = cm_id;
3041         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3042
3043         cm_id->add_ref(cm_id);
3044
3045         /* create a connect CM node connection */
3046         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3047                 conn_param->private_data_len, (void *)conn_param->private_data,
3048                 &cm_info);
3049         if (!cm_node) {
3050                 if (apbvt_set)
3051                         nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3052                                 PCI_FUNC(nesdev->pcidev->devfn),
3053                                 NES_MANAGE_APBVT_DEL);
3054
3055                 cm_id->rem_ref(cm_id);
3056                 return -ENOMEM;
3057         }
3058
3059         cm_node->apbvt_set = apbvt_set;
3060         nesqp->cm_node = cm_node;
3061         cm_node->nesqp = nesqp;
3062         nes_add_ref(&nesqp->ibqp);
3063
3064         return 0;
3065 }
3066
3067
3068 /**
3069  * nes_create_listen
3070  */
3071 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3072 {
3073         struct nes_vnic *nesvnic;
3074         struct nes_cm_listener *cm_node;
3075         struct nes_cm_info cm_info;
3076         struct nes_adapter *adapter;
3077         int err;
3078
3079
3080         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3081                         cm_id, ntohs(cm_id->local_addr.sin_port));
3082
3083         nesvnic = to_nesvnic(cm_id->device);
3084         if (!nesvnic)
3085                 return -EINVAL;
3086         adapter = nesvnic->nesdev->nesadapter;
3087         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3088                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3089
3090         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3091                         nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3092
3093         /* setup listen params in our api call struct */
3094         cm_info.loc_addr = nesvnic->local_ipaddr;
3095         cm_info.loc_port = cm_id->local_addr.sin_port;
3096         cm_info.backlog = backlog;
3097         cm_info.cm_id = cm_id;
3098
3099         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3100
3101
3102         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3103         if (!cm_node) {
3104                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3105                                 __func__, __LINE__);
3106                 return -ENOMEM;
3107         }
3108
3109         cm_id->provider_data = cm_node;
3110
3111         if (!cm_node->reused_node) {
3112                 err = nes_manage_apbvt(nesvnic,
3113                         ntohs(cm_id->local_addr.sin_port),
3114                         PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3115                         NES_MANAGE_APBVT_ADD);
3116                 if (err) {
3117                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3118                                 err);
3119                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3120                         return err;
3121                 }
3122                 cm_listens_created++;
3123         }
3124
3125         cm_id->add_ref(cm_id);
3126         cm_id->provider_data = (void *)cm_node;
3127
3128
3129         return 0;
3130 }
3131
3132
3133 /**
3134  * nes_destroy_listen
3135  */
3136 int nes_destroy_listen(struct iw_cm_id *cm_id)
3137 {
3138         if (cm_id->provider_data)
3139                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3140         else
3141                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3142
3143         cm_id->rem_ref(cm_id);
3144
3145         return 0;
3146 }
3147
3148
3149 /**
3150  * nes_cm_recv
3151  */
3152 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3153 {
3154         int rc = 0;
3155         cm_packets_received++;
3156         if ((g_cm_core) && (g_cm_core->api)) {
3157                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3158         } else {
3159                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3160                                 " cm is not setup properly.\n");
3161         }
3162
3163         return rc;
3164 }
3165
3166
3167 /**
3168  * nes_cm_start
3169  * Start and init a cm core module
3170  */
3171 int nes_cm_start(void)
3172 {
3173         nes_debug(NES_DBG_CM, "\n");
3174         /* create the primary CM core, pass this handle to subsequent core inits */
3175         g_cm_core = nes_cm_alloc_core();
3176         if (g_cm_core) {
3177                 return 0;
3178         } else {
3179                 return -ENOMEM;
3180         }
3181 }
3182
3183
3184 /**
3185  * nes_cm_stop
3186  * stop and dealloc all cm core instances
3187  */
3188 int nes_cm_stop(void)
3189 {
3190         g_cm_core->api->destroy_cm_core(g_cm_core);
3191         return 0;
3192 }
3193
3194
3195 /**
3196  * cm_event_connected
3197  * handle a connected event, setup QPs and HW
3198  */
3199 static void cm_event_connected(struct nes_cm_event *event)
3200 {
3201         u64 u64temp;
3202         struct nes_qp *nesqp;
3203         struct nes_vnic *nesvnic;
3204         struct nes_device *nesdev;
3205         struct nes_cm_node *cm_node;
3206         struct nes_adapter *nesadapter;
3207         struct ib_qp_attr attr;
3208         struct iw_cm_id *cm_id;
3209         struct iw_cm_event cm_event;
3210         struct nes_hw_qp_wqe *wqe;
3211         struct nes_v4_quad nes_quad;
3212         u32 crc_value;
3213         int ret;
3214
3215         /* get all our handles */
3216         cm_node = event->cm_node;
3217         cm_id = cm_node->cm_id;
3218         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3219         nesqp = (struct nes_qp *)cm_id->provider_data;
3220         nesvnic = to_nesvnic(nesqp->ibqp.device);
3221         nesdev = nesvnic->nesdev;
3222         nesadapter = nesdev->nesadapter;
3223
3224         if (nesqp->destroyed) {
3225                 return;
3226         }
3227         atomic_inc(&cm_connecteds);
3228         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3229                         " local port 0x%04X. jiffies = %lu.\n",
3230                         nesqp->hwqp.qp_id,
3231                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
3232                         ntohs(cm_id->remote_addr.sin_port),
3233                         ntohs(cm_id->local_addr.sin_port),
3234                         jiffies);
3235
3236         nes_cm_init_tsa_conn(nesqp, cm_node);
3237
3238         /* set the QP tsa context */
3239         nesqp->nesqp_context->tcpPorts[0] =
3240                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3241         nesqp->nesqp_context->tcpPorts[1] =
3242                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3243         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3244                 nesqp->nesqp_context->ip0 =
3245                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3246         else
3247                 nesqp->nesqp_context->ip0 =
3248                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3249
3250         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3251                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3252                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3253         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3254                         nes_arp_table(nesdev,
3255                         le32_to_cpu(nesqp->nesqp_context->ip0),
3256                         NULL, NES_ARP_RESOLVE) << 16);
3257         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3258                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3259         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3260         nesqp->nesqp_context->ird_ord_sizes |=
3261                         cpu_to_le32((u32)1 <<
3262                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3263
3264         /* Adjust tail for not having a LSMM */
3265         nesqp->hwqp.sq_tail = 1;
3266
3267 #if defined(NES_SEND_FIRST_WRITE)
3268         if (cm_node->send_write0) {
3269                 nes_debug(NES_DBG_CM, "Sending first write.\n");
3270                 wqe = &nesqp->hwqp.sq_vbase[0];
3271                 u64temp = (unsigned long)nesqp;
3272                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3273                 set_wqe_64bit_value(wqe->wqe_words,
3274                                 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3275                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3276                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3277                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3278                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3279                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3280                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3281                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3282
3283                 /* use the reserved spot on the WQ for the extra first WQE */
3284                 nesqp->nesqp_context->ird_ord_sizes &=
3285                         cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3286                                                 NES_QPCONTEXT_ORDIRD_WRPDU |
3287                                                 NES_QPCONTEXT_ORDIRD_ALSMM));
3288                 nesqp->skip_lsmm = 1;
3289                 nesqp->hwqp.sq_tail = 0;
3290                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3291                                 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3292         }
3293 #endif
3294
3295         memset(&nes_quad, 0, sizeof(nes_quad));
3296
3297         nes_quad.DstIpAdrIndex =
3298                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3299         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3300                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3301         else
3302                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3303         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3304         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3305
3306         /* Produce hash key */
3307         crc_value = get_crc_value(&nes_quad);
3308         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3309         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3310                         nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3311
3312         nesqp->hte_index &= nesadapter->hte_index_mask;
3313         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3314
3315         nesqp->ietf_frame = &cm_node->mpa_frame;
3316         nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3317         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3318
3319         /* notify OF layer we successfully created the requested connection */
3320         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3321         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3322         cm_event.provider_data = cm_id->provider_data;
3323         cm_event.local_addr.sin_family = AF_INET;
3324         cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3325         cm_event.remote_addr = cm_id->remote_addr;
3326
3327         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3328         cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3329
3330         cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3331         ret = cm_id->event_handler(cm_id, &cm_event);
3332         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3333
3334         if (ret)
3335                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3336                         "ret=%d\n", __func__, __LINE__, ret);
3337         attr.qp_state = IB_QPS_RTS;
3338         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3339
3340         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3341                 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3342
3343         return;
3344 }
3345
3346
3347 /**
3348  * cm_event_connect_error
3349  */
3350 static void cm_event_connect_error(struct nes_cm_event *event)
3351 {
3352         struct nes_qp *nesqp;
3353         struct iw_cm_id *cm_id;
3354         struct iw_cm_event cm_event;
3355         /* struct nes_cm_info cm_info; */
3356         int ret;
3357
3358         if (!event->cm_node)
3359                 return;
3360
3361         cm_id = event->cm_node->cm_id;
3362         if (!cm_id) {
3363                 return;
3364         }
3365
3366         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3367         nesqp = cm_id->provider_data;
3368
3369         if (!nesqp) {
3370                 return;
3371         }
3372
3373         /* notify OF layer about this connection error event */
3374         /* cm_id->rem_ref(cm_id); */
3375         nesqp->cm_id = NULL;
3376         cm_id->provider_data = NULL;
3377         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3378         cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
3379         cm_event.provider_data = cm_id->provider_data;
3380         cm_event.local_addr = cm_id->local_addr;
3381         cm_event.remote_addr = cm_id->remote_addr;
3382         cm_event.private_data = NULL;
3383         cm_event.private_data_len = 0;
3384
3385         nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3386                 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3387                 cm_event.remote_addr.sin_addr.s_addr);
3388
3389         ret = cm_id->event_handler(cm_id, &cm_event);
3390         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3391         if (ret)
3392                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3393                         "ret=%d\n", __func__, __LINE__, ret);
3394         cm_id->rem_ref(cm_id);
3395
3396         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3397         return;
3398 }
3399
3400
3401 /**
3402  * cm_event_reset
3403  */
3404 static void cm_event_reset(struct nes_cm_event *event)
3405 {
3406         struct nes_qp *nesqp;
3407         struct iw_cm_id *cm_id;
3408         struct iw_cm_event cm_event;
3409         /* struct nes_cm_info cm_info; */
3410         int ret;
3411
3412         if (!event->cm_node)
3413                 return;
3414
3415         if (!event->cm_node->cm_id)
3416                 return;
3417
3418         cm_id = event->cm_node->cm_id;
3419
3420         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3421         nesqp = cm_id->provider_data;
3422
3423         nesqp->cm_id = NULL;
3424         /* cm_id->provider_data = NULL; */
3425         cm_event.event = IW_CM_EVENT_DISCONNECT;
3426         cm_event.status = IW_CM_EVENT_STATUS_RESET;
3427         cm_event.provider_data = cm_id->provider_data;
3428         cm_event.local_addr = cm_id->local_addr;
3429         cm_event.remote_addr = cm_id->remote_addr;
3430         cm_event.private_data = NULL;
3431         cm_event.private_data_len = 0;
3432
3433         ret = cm_id->event_handler(cm_id, &cm_event);
3434         cm_id->add_ref(cm_id);
3435         atomic_inc(&cm_closes);
3436         cm_event.event = IW_CM_EVENT_CLOSE;
3437         cm_event.status = IW_CM_EVENT_STATUS_OK;
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         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3444         ret = cm_id->event_handler(cm_id, &cm_event);
3445
3446         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3447
3448
3449         /* notify OF layer about this connection error event */
3450         cm_id->rem_ref(cm_id);
3451
3452         return;
3453 }
3454
3455
3456 /**
3457  * cm_event_mpa_req
3458  */
3459 static void cm_event_mpa_req(struct nes_cm_event *event)
3460 {
3461         struct iw_cm_id   *cm_id;
3462         struct iw_cm_event cm_event;
3463         int ret;
3464         struct nes_cm_node *cm_node;
3465
3466         cm_node = event->cm_node;
3467         if (!cm_node)
3468                 return;
3469         cm_id = cm_node->cm_id;
3470
3471         atomic_inc(&cm_connect_reqs);
3472         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3473                         cm_node, cm_id, jiffies);
3474
3475         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3476         cm_event.status = IW_CM_EVENT_STATUS_OK;
3477         cm_event.provider_data = (void *)cm_node;
3478
3479         cm_event.local_addr.sin_family = AF_INET;
3480         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3481         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3482
3483         cm_event.remote_addr.sin_family = AF_INET;
3484         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3485         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3486         cm_event.private_data = cm_node->mpa_frame_buf;
3487         cm_event.private_data_len  = (u8) cm_node->mpa_frame_size;
3488
3489         ret = cm_id->event_handler(cm_id, &cm_event);
3490         if (ret)
3491                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3492                                 __func__, __LINE__, ret);
3493         return;
3494 }
3495
3496
3497 static void cm_event_mpa_reject(struct nes_cm_event *event)
3498 {
3499         struct iw_cm_id   *cm_id;
3500         struct iw_cm_event cm_event;
3501         struct nes_cm_node *cm_node;
3502         int ret;
3503
3504         cm_node = event->cm_node;
3505         if (!cm_node)
3506                 return;
3507         cm_id = cm_node->cm_id;
3508
3509         atomic_inc(&cm_connect_reqs);
3510         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3511                         cm_node, cm_id, jiffies);
3512
3513         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3514         cm_event.status = -ECONNREFUSED;
3515         cm_event.provider_data = cm_id->provider_data;
3516
3517         cm_event.local_addr.sin_family = AF_INET;
3518         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3519         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3520
3521         cm_event.remote_addr.sin_family = AF_INET;
3522         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3523         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3524
3525         cm_event.private_data = cm_node->mpa_frame_buf;
3526         cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3527
3528         nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3529                         "remove_addr=%08x\n",
3530                         cm_event.local_addr.sin_addr.s_addr,
3531                         cm_event.remote_addr.sin_addr.s_addr);
3532
3533         ret = cm_id->event_handler(cm_id, &cm_event);
3534         if (ret)
3535                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3536                                 __func__, __LINE__, ret);
3537
3538         return;
3539 }
3540
3541
3542 static void nes_cm_event_handler(struct work_struct *);
3543
3544 /**
3545  * nes_cm_post_event
3546  * post an event to the cm event handler
3547  */
3548 static int nes_cm_post_event(struct nes_cm_event *event)
3549 {
3550         atomic_inc(&event->cm_node->cm_core->events_posted);
3551         add_ref_cm_node(event->cm_node);
3552         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3553         INIT_WORK(&event->event_work, nes_cm_event_handler);
3554         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3555                 event->cm_node, event);
3556
3557         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3558
3559         nes_debug(NES_DBG_CM, "Exit\n");
3560         return 0;
3561 }
3562
3563
3564 /**
3565  * nes_cm_event_handler
3566  * worker function to handle cm events
3567  * will free instance of nes_cm_event
3568  */
3569 static void nes_cm_event_handler(struct work_struct *work)
3570 {
3571         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3572                         event_work);
3573         struct nes_cm_core *cm_core;
3574
3575         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3576                 return;
3577
3578         cm_core = event->cm_node->cm_core;
3579         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3580                 event, event->type, atomic_read(&cm_core->events_posted));
3581
3582         switch (event->type) {
3583         case NES_CM_EVENT_MPA_REQ:
3584                 cm_event_mpa_req(event);
3585                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3586                         event->cm_node);
3587                 break;
3588         case NES_CM_EVENT_RESET:
3589                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3590                         event->cm_node);
3591                 cm_event_reset(event);
3592                 break;
3593         case NES_CM_EVENT_CONNECTED:
3594                 if ((!event->cm_node->cm_id) ||
3595                         (event->cm_node->state != NES_CM_STATE_TSA))
3596                         break;
3597                 cm_event_connected(event);
3598                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3599                 break;
3600         case NES_CM_EVENT_MPA_REJECT:
3601                 if ((!event->cm_node->cm_id) ||
3602                                 (event->cm_node->state == NES_CM_STATE_TSA))
3603                         break;
3604                 cm_event_mpa_reject(event);
3605                 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3606                 break;
3607
3608         case NES_CM_EVENT_ABORTED:
3609                 if ((!event->cm_node->cm_id) ||
3610                         (event->cm_node->state == NES_CM_STATE_TSA))
3611                         break;
3612                 cm_event_connect_error(event);
3613                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3614                 break;
3615         case NES_CM_EVENT_DROPPED_PKT:
3616                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3617                 break;
3618         default:
3619                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3620                 break;
3621         }
3622
3623         atomic_dec(&cm_core->events_posted);
3624         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3625         rem_ref_cm_node(cm_core, event->cm_node);
3626         kfree(event);
3627
3628         return;
3629 }