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