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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / infiniband / hw / nes / nes_cm.c
blob61e0efd4ccfb5d9d4d6f6bdc50f765d365c07d0e
1 /*
2 * Copyright (c) 2006 - 2009 Intel Corporation. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34
35 #define TCPOPT_TIMESTAMP 8
36
37 #include <asm/atomic.h>
38 #include <linux/skbuff.h>
39 #include <linux/ip.h>
40 #include <linux/tcp.h>
41 #include <linux/init.h>
42 #include <linux/if_arp.h>
43 #include <linux/if_vlan.h>
44 #include <linux/notifier.h>
45 #include <linux/net.h>
46 #include <linux/types.h>
47 #include <linux/timer.h>
48 #include <linux/time.h>
49 #include <linux/delay.h>
50 #include <linux/etherdevice.h>
51 #include <linux/netdevice.h>
52 #include <linux/random.h>
53 #include <linux/list.h>
54 #include <linux/threads.h>
55 #include <linux/highmem.h>
56 #include <linux/slab.h>
57 #include <net/arp.h>
58 #include <net/neighbour.h>
59 #include <net/route.h>
60 #include <net/ip_fib.h>
61 #include <net/tcp.h>
62
63 #include "nes.h"
64
65 u32 cm_packets_sent;
66 u32 cm_packets_bounced;
67 u32 cm_packets_dropped;
68 u32 cm_packets_retrans;
69 u32 cm_packets_created;
70 u32 cm_packets_received;
71 atomic_t cm_listens_created;
72 atomic_t cm_listens_destroyed;
73 u32 cm_backlog_drops;
74 atomic_t cm_loopbacks;
75 atomic_t cm_nodes_created;
76 atomic_t cm_nodes_destroyed;
77 atomic_t cm_accel_dropped_pkts;
78 atomic_t cm_resets_recvd;
79
80 static inline int mini_cm_accelerated(struct nes_cm_core *,
81 struct nes_cm_node *);
82 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
83 struct nes_vnic *, struct nes_cm_info *);
84 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
85 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
86 struct nes_vnic *, u16, void *, struct nes_cm_info *);
87 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
88 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
89 struct nes_cm_node *);
90 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
91 struct nes_cm_node *);
92 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
93 struct sk_buff *);
94 static int mini_cm_dealloc_core(struct nes_cm_core *);
95 static int mini_cm_get(struct nes_cm_core *);
96 static int mini_cm_set(struct nes_cm_core *, u32, u32);
97
98 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
99 void *, u32, void *, u32, u8);
100 static int add_ref_cm_node(struct nes_cm_node *);
101 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
102
103 static int nes_cm_disconn_true(struct nes_qp *);
104 static int nes_cm_post_event(struct nes_cm_event *event);
105 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
106 static void nes_disconnect_worker(struct work_struct *work);
107
108 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
109 static int send_mpa_reject(struct nes_cm_node *);
110 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
111 static int send_reset(struct nes_cm_node *, struct sk_buff *);
112 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
113 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
114 static void process_packet(struct nes_cm_node *, struct sk_buff *,
115 struct nes_cm_core *);
116
117 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
118 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
119 static void cleanup_retrans_entry(struct nes_cm_node *);
120 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
121 static void free_retrans_entry(struct nes_cm_node *cm_node);
122 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
123 struct sk_buff *skb, int optionsize, int passive);
124
125 /* CM event handler functions */
126 static void cm_event_connected(struct nes_cm_event *);
127 static void cm_event_connect_error(struct nes_cm_event *);
128 static void cm_event_reset(struct nes_cm_event *);
129 static void cm_event_mpa_req(struct nes_cm_event *);
130 static void cm_event_mpa_reject(struct nes_cm_event *);
131 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
132
133 static void print_core(struct nes_cm_core *core);
134
135 /* External CM API Interface */
136 /* instance of function pointers for client API */
137 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
138 static struct nes_cm_ops nes_cm_api = {
139 mini_cm_accelerated,
140 mini_cm_listen,
141 mini_cm_del_listen,
142 mini_cm_connect,
143 mini_cm_close,
144 mini_cm_accept,
145 mini_cm_reject,
146 mini_cm_recv_pkt,
147 mini_cm_dealloc_core,
148 mini_cm_get,
149 mini_cm_set
150 };
151
152 static struct nes_cm_core *g_cm_core;
153
154 atomic_t cm_connects;
155 atomic_t cm_accepts;
156 atomic_t cm_disconnects;
157 atomic_t cm_closes;
158 atomic_t cm_connecteds;
159 atomic_t cm_connect_reqs;
160 atomic_t cm_rejects;
161
162
163 /**
164 * create_event
165 */
166 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
167 enum nes_cm_event_type type)
168 {
169 struct nes_cm_event *event;
170
171 if (!cm_node->cm_id)
172 return NULL;
173
174 /* allocate an empty event */
175 event = kzalloc(sizeof(*event), GFP_ATOMIC);
176
177 if (!event)
178 return NULL;
179
180 event->type = type;
181 event->cm_node = cm_node;
182 event->cm_info.rem_addr = cm_node->rem_addr;
183 event->cm_info.loc_addr = cm_node->loc_addr;
184 event->cm_info.rem_port = cm_node->rem_port;
185 event->cm_info.loc_port = cm_node->loc_port;
186 event->cm_info.cm_id = cm_node->cm_id;
187
188 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
189 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
190 cm_node, event, type, event->cm_info.loc_addr,
191 event->cm_info.loc_port, event->cm_info.rem_addr,
192 event->cm_info.rem_port);
193
194 nes_cm_post_event(event);
195 return event;
196 }
197
198
199 /**
200 * send_mpa_request
201 */
202 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
203 {
204 if (!skb) {
205 nes_debug(NES_DBG_CM, "skb set to NULL\n");
206 return -1;
207 }
208
209 /* send an MPA Request frame */
210 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
211 cm_node->mpa_frame_size, SET_ACK);
212
213 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
214 }
215
216
217
218 static int send_mpa_reject(struct nes_cm_node *cm_node)
219 {
220 struct sk_buff *skb = NULL;
221
222 skb = dev_alloc_skb(MAX_CM_BUFFER);
223 if (!skb) {
224 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
225 return -ENOMEM;
226 }
227
228 /* send an MPA reject frame */
229 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
230 cm_node->mpa_frame_size, SET_ACK | SET_FIN);
231
232 cm_node->state = NES_CM_STATE_FIN_WAIT1;
233 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
234 }
235
236
237 /**
238 * recv_mpa - process a received TCP pkt, we are expecting an
239 * IETF MPA frame
240 */
241 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
242 u32 len)
243 {
244 struct ietf_mpa_frame *mpa_frame;
245
246 *type = NES_MPA_REQUEST_ACCEPT;
247
248 /* assume req frame is in tcp data payload */
249 if (len < sizeof(struct ietf_mpa_frame)) {
250 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
251 return -EINVAL;
252 }
253
254 mpa_frame = (struct ietf_mpa_frame *)buffer;
255 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
256 /* make sure mpa private data len is less than 512 bytes */
257 if (cm_node->mpa_frame_size > IETF_MAX_PRIV_DATA_LEN) {
258 nes_debug(NES_DBG_CM, "The received Length of Private"
259 " Data field exceeds 512 octets\n");
260 return -EINVAL;
261 }
262 /*
263 * make sure MPA receiver interoperate with the
264 * received MPA version and MPA key information
265 *
266 */
267 if (mpa_frame->rev != mpa_version) {
268 nes_debug(NES_DBG_CM, "The received mpa version"
269 " can not be interoperated\n");
270 return -EINVAL;
271 }
272 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
273 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
274 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
275 return -EINVAL;
276 }
277 } else {
278 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
279 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
280 return -EINVAL;
281 }
282 }
283
284 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
285 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
286 " complete (%x + %x != %x)\n",
287 cm_node->mpa_frame_size,
288 (u32)sizeof(struct ietf_mpa_frame), len);
289 return -EINVAL;
290 }
291 /* make sure it does not exceed the max size */
292 if (len > MAX_CM_BUFFER) {
293 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
294 " (%x + %x != %x)\n",
295 cm_node->mpa_frame_size,
296 (u32)sizeof(struct ietf_mpa_frame), len);
297 return -EINVAL;
298 }
299
300 /* copy entire MPA frame to our cm_node's frame */
301 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
302 cm_node->mpa_frame_size);
303
304 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
305 *type = NES_MPA_REQUEST_REJECT;
306 return 0;
307 }
308
309
310 /**
311 * form_cm_frame - get a free packet and build empty frame Use
312 * node info to build.
313 */
314 static void form_cm_frame(struct sk_buff *skb,
315 struct nes_cm_node *cm_node, void *options, u32 optionsize,
316 void *data, u32 datasize, u8 flags)
317 {
318 struct tcphdr *tcph;
319 struct iphdr *iph;
320 struct ethhdr *ethh;
321 u8 *buf;
322 u16 packetsize = sizeof(*iph);
323
324 packetsize += sizeof(*tcph);
325 packetsize += optionsize + datasize;
326
327 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
328
329 skb->len = 0;
330 buf = skb_put(skb, packetsize + ETH_HLEN);
331
332 ethh = (struct ethhdr *) buf;
333 buf += ETH_HLEN;
334
335 iph = (struct iphdr *)buf;
336 buf += sizeof(*iph);
337 tcph = (struct tcphdr *)buf;
338 skb_reset_mac_header(skb);
339 skb_set_network_header(skb, ETH_HLEN);
340 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
341 buf += sizeof(*tcph);
342
343 skb->ip_summed = CHECKSUM_PARTIAL;
344 skb->protocol = htons(0x800);
345 skb->data_len = 0;
346 skb->mac_len = ETH_HLEN;
347
348 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
349 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
350 ethh->h_proto = htons(0x0800);
351
352 iph->version = IPVERSION;
353 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
354 iph->tos = 0;
355 iph->tot_len = htons(packetsize);
356 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
357
358 iph->frag_off = htons(0x4000);
359 iph->ttl = 0x40;
360 iph->protocol = 0x06; /* IPPROTO_TCP */
361
362 iph->saddr = htonl(cm_node->loc_addr);
363 iph->daddr = htonl(cm_node->rem_addr);
364
365 tcph->source = htons(cm_node->loc_port);
366 tcph->dest = htons(cm_node->rem_port);
367 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
368
369 if (flags & SET_ACK) {
370 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
371 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
372 tcph->ack = 1;
373 } else
374 tcph->ack_seq = 0;
375
376 if (flags & SET_SYN) {
377 cm_node->tcp_cntxt.loc_seq_num++;
378 tcph->syn = 1;
379 } else
380 cm_node->tcp_cntxt.loc_seq_num += datasize;
381
382 if (flags & SET_FIN) {
383 cm_node->tcp_cntxt.loc_seq_num++;
384 tcph->fin = 1;
385 }
386
387 if (flags & SET_RST)
388 tcph->rst = 1;
389
390 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
391 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
392 tcph->urg_ptr = 0;
393 if (optionsize)
394 memcpy(buf, options, optionsize);
395 buf += optionsize;
396 if (datasize)
397 memcpy(buf, data, datasize);
398
399 skb_shinfo(skb)->nr_frags = 0;
400 cm_packets_created++;
401
402 }
403
404
405 /**
406 * print_core - dump a cm core
407 */
408 static void print_core(struct nes_cm_core *core)
409 {
410 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
411 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
412 if (!core)
413 return;
414 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
415
416 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
417
418 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
419 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
420
421 nes_debug(NES_DBG_CM, "core : %p \n", core);
422
423 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
424 }
425
426
427 /**
428 * schedule_nes_timer
429 * note - cm_node needs to be protected before calling this. Encase in:
430 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
431 */
432 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
433 enum nes_timer_type type, int send_retrans,
434 int close_when_complete)
435 {
436 unsigned long flags;
437 struct nes_cm_core *cm_core = cm_node->cm_core;
438 struct nes_timer_entry *new_send;
439 int ret = 0;
440 u32 was_timer_set;
441
442 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
443 if (!new_send)
444 return -ENOMEM;
445
446 /* new_send->timetosend = currenttime */
447 new_send->retrycount = NES_DEFAULT_RETRYS;
448 new_send->retranscount = NES_DEFAULT_RETRANS;
449 new_send->skb = skb;
450 new_send->timetosend = jiffies;
451 new_send->type = type;
452 new_send->netdev = cm_node->netdev;
453 new_send->send_retrans = send_retrans;
454 new_send->close_when_complete = close_when_complete;
455
456 if (type == NES_TIMER_TYPE_CLOSE) {
457 new_send->timetosend += (HZ/10);
458 if (cm_node->recv_entry) {
459 kfree(new_send);
460 WARN_ON(1);
461 return -EINVAL;
462 }
463 cm_node->recv_entry = new_send;
464 }
465
466 if (type == NES_TIMER_TYPE_SEND) {
467 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
468 atomic_inc(&new_send->skb->users);
469 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
470 cm_node->send_entry = new_send;
471 add_ref_cm_node(cm_node);
472 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
473 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
474
475 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
476 if (ret != NETDEV_TX_OK) {
477 nes_debug(NES_DBG_CM, "Error sending packet %p "
478 "(jiffies = %lu)\n", new_send, jiffies);
479 new_send->timetosend = jiffies;
480 ret = NETDEV_TX_OK;
481 } else {
482 cm_packets_sent++;
483 if (!send_retrans) {
484 cleanup_retrans_entry(cm_node);
485 if (close_when_complete)
486 rem_ref_cm_node(cm_core, cm_node);
487 return ret;
488 }
489 }
490 }
491
492 was_timer_set = timer_pending(&cm_core->tcp_timer);
493
494 if (!was_timer_set) {
495 cm_core->tcp_timer.expires = new_send->timetosend;
496 add_timer(&cm_core->tcp_timer);
497 }
498
499 return ret;
500 }
501
502 static void nes_retrans_expired(struct nes_cm_node *cm_node)
503 {
504 struct iw_cm_id *cm_id = cm_node->cm_id;
505 enum nes_cm_node_state state = cm_node->state;
506 cm_node->state = NES_CM_STATE_CLOSED;
507 switch (state) {
508 case NES_CM_STATE_SYN_RCVD:
509 case NES_CM_STATE_CLOSING:
510 rem_ref_cm_node(cm_node->cm_core, cm_node);
511 break;
512 case NES_CM_STATE_LAST_ACK:
513 case NES_CM_STATE_FIN_WAIT1:
514 if (cm_node->cm_id)
515 cm_id->rem_ref(cm_id);
516 send_reset(cm_node, NULL);
517 break;
518 default:
519 add_ref_cm_node(cm_node);
520 send_reset(cm_node, NULL);
521 create_event(cm_node, NES_CM_EVENT_ABORTED);
522 }
523 }
524
525 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
526 {
527 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
528 struct iw_cm_id *cm_id = cm_node->cm_id;
529 struct nes_qp *nesqp;
530 unsigned long qplockflags;
531
532 if (!recv_entry)
533 return;
534 nesqp = (struct nes_qp *)recv_entry->skb;
535 if (nesqp) {
536 spin_lock_irqsave(&nesqp->lock, qplockflags);
537 if (nesqp->cm_id) {
538 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
539 "refcount = %d: HIT A "
540 "NES_TIMER_TYPE_CLOSE with something "
541 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
542 atomic_read(&nesqp->refcount));
543 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
544 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
545 nesqp->ibqp_state = IB_QPS_ERR;
546 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
547 nes_cm_disconn(nesqp);
548 } else {
549 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
550 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
551 "refcount = %d: HIT A "
552 "NES_TIMER_TYPE_CLOSE with nothing "
553 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
554 atomic_read(&nesqp->refcount));
555 }
556 } else if (rem_node) {
557 /* TIME_WAIT state */
558 rem_ref_cm_node(cm_node->cm_core, cm_node);
559 }
560 if (cm_node->cm_id)
561 cm_id->rem_ref(cm_id);
562 kfree(recv_entry);
563 cm_node->recv_entry = NULL;
564 }
565
566 /**
567 * nes_cm_timer_tick
568 */
569 static void nes_cm_timer_tick(unsigned long pass)
570 {
571 unsigned long flags;
572 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
573 struct nes_cm_node *cm_node;
574 struct nes_timer_entry *send_entry, *recv_entry;
575 struct list_head *list_core_temp;
576 struct list_head *list_node;
577 struct nes_cm_core *cm_core = g_cm_core;
578 u32 settimer = 0;
579 unsigned long timetosend;
580 int ret = NETDEV_TX_OK;
581
582 struct list_head timer_list;
583 INIT_LIST_HEAD(&timer_list);
584 spin_lock_irqsave(&cm_core->ht_lock, flags);
585
586 list_for_each_safe(list_node, list_core_temp,
587 &cm_core->connected_nodes) {
588 cm_node = container_of(list_node, struct nes_cm_node, list);
589 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
590 add_ref_cm_node(cm_node);
591 list_add(&cm_node->timer_entry, &timer_list);
592 }
593 }
594 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
595
596 list_for_each_safe(list_node, list_core_temp, &timer_list) {
597 cm_node = container_of(list_node, struct nes_cm_node,
598 timer_entry);
599 recv_entry = cm_node->recv_entry;
600
601 if (recv_entry) {
602 if (time_after(recv_entry->timetosend, jiffies)) {
603 if (nexttimeout > recv_entry->timetosend ||
604 !settimer) {
605 nexttimeout = recv_entry->timetosend;
606 settimer = 1;
607 }
608 } else
609 handle_recv_entry(cm_node, 1);
610 }
611
612 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
613 do {
614 send_entry = cm_node->send_entry;
615 if (!send_entry)
616 break;
617 if (time_after(send_entry->timetosend, jiffies)) {
618 if (cm_node->state != NES_CM_STATE_TSA) {
619 if ((nexttimeout >
620 send_entry->timetosend) ||
621 !settimer) {
622 nexttimeout =
623 send_entry->timetosend;
624 settimer = 1;
625 }
626 } else {
627 free_retrans_entry(cm_node);
628 }
629 break;
630 }
631
632 if ((cm_node->state == NES_CM_STATE_TSA) ||
633 (cm_node->state == NES_CM_STATE_CLOSED)) {
634 free_retrans_entry(cm_node);
635 break;
636 }
637
638 if (!send_entry->retranscount ||
639 !send_entry->retrycount) {
640 cm_packets_dropped++;
641 free_retrans_entry(cm_node);
642
643 spin_unlock_irqrestore(
644 &cm_node->retrans_list_lock, flags);
645 nes_retrans_expired(cm_node);
646 cm_node->state = NES_CM_STATE_CLOSED;
647 spin_lock_irqsave(&cm_node->retrans_list_lock,
648 flags);
649 break;
650 }
651 atomic_inc(&send_entry->skb->users);
652 cm_packets_retrans++;
653 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
654 "for node %p, jiffies = %lu, time to send = "
655 "%lu, retranscount = %u, send_entry->seq_num = "
656 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
657 "0x%08X\n", send_entry, cm_node, jiffies,
658 send_entry->timetosend,
659 send_entry->retranscount,
660 send_entry->seq_num,
661 cm_node->tcp_cntxt.rem_ack_num);
662
663 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
664 flags);
665 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
666 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
667 if (ret != NETDEV_TX_OK) {
668 nes_debug(NES_DBG_CM, "rexmit failed for "
669 "node=%p\n", cm_node);
670 cm_packets_bounced++;
671 send_entry->retrycount--;
672 nexttimeout = jiffies + NES_SHORT_TIME;
673 settimer = 1;
674 break;
675 } else {
676 cm_packets_sent++;
677 }
678 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
679 "%u, retry count = %u.\n",
680 send_entry->retranscount,
681 send_entry->retrycount);
682 if (send_entry->send_retrans) {
683 send_entry->retranscount--;
684 timetosend = (NES_RETRY_TIMEOUT <<
685 (NES_DEFAULT_RETRANS - send_entry->retranscount));
686
687 send_entry->timetosend = jiffies +
688 min(timetosend, NES_MAX_TIMEOUT);
689 if (nexttimeout > send_entry->timetosend ||
690 !settimer) {
691 nexttimeout = send_entry->timetosend;
692 settimer = 1;
693 }
694 } else {
695 int close_when_complete;
696 close_when_complete =
697 send_entry->close_when_complete;
698 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
699 cm_node, cm_node->state);
700 free_retrans_entry(cm_node);
701 if (close_when_complete)
702 rem_ref_cm_node(cm_node->cm_core,
703 cm_node);
704 }
705 } while (0);
706
707 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
708 rem_ref_cm_node(cm_node->cm_core, cm_node);
709 }
710
711 if (settimer) {
712 if (!timer_pending(&cm_core->tcp_timer)) {
713 cm_core->tcp_timer.expires = nexttimeout;
714 add_timer(&cm_core->tcp_timer);
715 }
716 }
717 }
718
719
720 /**
721 * send_syn
722 */
723 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
724 struct sk_buff *skb)
725 {
726 int ret;
727 int flags = SET_SYN;
728 char optionsbuffer[sizeof(struct option_mss) +
729 sizeof(struct option_windowscale) + sizeof(struct option_base) +
730 TCP_OPTIONS_PADDING];
731
732 int optionssize = 0;
733 /* Sending MSS option */
734 union all_known_options *options;
735
736 if (!cm_node)
737 return -EINVAL;
738
739 options = (union all_known_options *)&optionsbuffer[optionssize];
740 options->as_mss.optionnum = OPTION_NUMBER_MSS;
741 options->as_mss.length = sizeof(struct option_mss);
742 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
743 optionssize += sizeof(struct option_mss);
744
745 options = (union all_known_options *)&optionsbuffer[optionssize];
746 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
747 options->as_windowscale.length = sizeof(struct option_windowscale);
748 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
749 optionssize += sizeof(struct option_windowscale);
750
751 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
752 options = (union all_known_options *)&optionsbuffer[optionssize];
753 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
754 options->as_base.length = sizeof(struct option_base);
755 optionssize += sizeof(struct option_base);
756 /* we need the size to be a multiple of 4 */
757 options = (union all_known_options *)&optionsbuffer[optionssize];
758 options->as_end = 1;
759 optionssize += 1;
760 options = (union all_known_options *)&optionsbuffer[optionssize];
761 options->as_end = 1;
762 optionssize += 1;
763 }
764
765 options = (union all_known_options *)&optionsbuffer[optionssize];
766 options->as_end = OPTION_NUMBER_END;
767 optionssize += 1;
768
769 if (!skb)
770 skb = dev_alloc_skb(MAX_CM_BUFFER);
771 if (!skb) {
772 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
773 return -1;
774 }
775
776 if (sendack)
777 flags |= SET_ACK;
778
779 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
780 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
781
782 return ret;
783 }
784
785
786 /**
787 * send_reset
788 */
789 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
790 {
791 int ret;
792 int flags = SET_RST | SET_ACK;
793
794 if (!skb)
795 skb = dev_alloc_skb(MAX_CM_BUFFER);
796 if (!skb) {
797 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
798 return -ENOMEM;
799 }
800
801 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
802 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
803
804 return ret;
805 }
806
807
808 /**
809 * send_ack
810 */
811 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
812 {
813 int ret;
814
815 if (!skb)
816 skb = dev_alloc_skb(MAX_CM_BUFFER);
817
818 if (!skb) {
819 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
820 return -1;
821 }
822
823 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
824 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
825
826 return ret;
827 }
828
829
830 /**
831 * send_fin
832 */
833 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
834 {
835 int ret;
836
837 /* if we didn't get a frame get one */
838 if (!skb)
839 skb = dev_alloc_skb(MAX_CM_BUFFER);
840
841 if (!skb) {
842 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
843 return -1;
844 }
845
846 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
847 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
848
849 return ret;
850 }
851
852
853 /**
854 * find_node - find a cm node that matches the reference cm node
855 */
856 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
857 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
858 {
859 unsigned long flags;
860 struct list_head *hte;
861 struct nes_cm_node *cm_node;
862
863 /* get a handle on the hte */
864 hte = &cm_core->connected_nodes;
865
866 /* walk list and find cm_node associated with this session ID */
867 spin_lock_irqsave(&cm_core->ht_lock, flags);
868 list_for_each_entry(cm_node, hte, list) {
869 /* compare quad, return node handle if a match */
870 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
871 cm_node->loc_addr, cm_node->loc_port,
872 loc_addr, loc_port,
873 cm_node->rem_addr, cm_node->rem_port,
874 rem_addr, rem_port);
875 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
876 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
877 add_ref_cm_node(cm_node);
878 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
879 return cm_node;
880 }
881 }
882 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
883
884 /* no owner node */
885 return NULL;
886 }
887
888
889 /**
890 * find_listener - find a cm node listening on this addr-port pair
891 */
892 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
893 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
894 {
895 unsigned long flags;
896 struct nes_cm_listener *listen_node;
897
898 /* walk list and find cm_node associated with this session ID */
899 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
900 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
901 /* compare node pair, return node handle if a match */
902 if (((listen_node->loc_addr == dst_addr) ||
903 listen_node->loc_addr == 0x00000000) &&
904 (listen_node->loc_port == dst_port) &&
905 (listener_state & listen_node->listener_state)) {
906 atomic_inc(&listen_node->ref_count);
907 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
908 return listen_node;
909 }
910 }
911 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
912
913 /* no listener */
914 return NULL;
915 }
916
917
918 /**
919 * add_hte_node - add a cm node to the hash table
920 */
921 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
922 {
923 unsigned long flags;
924 struct list_head *hte;
925
926 if (!cm_node || !cm_core)
927 return -EINVAL;
928
929 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
930 cm_node);
931
932 spin_lock_irqsave(&cm_core->ht_lock, flags);
933
934 /* get a handle on the hash table element (list head for this slot) */
935 hte = &cm_core->connected_nodes;
936 list_add_tail(&cm_node->list, hte);
937 atomic_inc(&cm_core->ht_node_cnt);
938
939 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
940
941 return 0;
942 }
943
944
945 /**
946 * mini_cm_dec_refcnt_listen
947 */
948 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
949 struct nes_cm_listener *listener, int free_hanging_nodes)
950 {
951 int ret = -EINVAL;
952 int err = 0;
953 unsigned long flags;
954 struct list_head *list_pos = NULL;
955 struct list_head *list_temp = NULL;
956 struct nes_cm_node *cm_node = NULL;
957 struct list_head reset_list;
958
959 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
960 "refcnt=%d\n", listener, free_hanging_nodes,
961 atomic_read(&listener->ref_count));
962 /* free non-accelerated child nodes for this listener */
963 INIT_LIST_HEAD(&reset_list);
964 if (free_hanging_nodes) {
965 spin_lock_irqsave(&cm_core->ht_lock, flags);
966 list_for_each_safe(list_pos, list_temp,
967 &g_cm_core->connected_nodes) {
968 cm_node = container_of(list_pos, struct nes_cm_node,
969 list);
970 if ((cm_node->listener == listener) &&
971 (!cm_node->accelerated)) {
972 add_ref_cm_node(cm_node);
973 list_add(&cm_node->reset_entry, &reset_list);
974 }
975 }
976 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
977 }
978
979 list_for_each_safe(list_pos, list_temp, &reset_list) {
980 cm_node = container_of(list_pos, struct nes_cm_node,
981 reset_entry);
982 {
983 struct nes_cm_node *loopback = cm_node->loopbackpartner;
984 enum nes_cm_node_state old_state;
985 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
986 rem_ref_cm_node(cm_node->cm_core, cm_node);
987 } else {
988 if (!loopback) {
989 cleanup_retrans_entry(cm_node);
990 err = send_reset(cm_node, NULL);
991 if (err) {
992 cm_node->state =
993 NES_CM_STATE_CLOSED;
994 WARN_ON(1);
995 } else {
996 old_state = cm_node->state;
997 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
998 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
999 rem_ref_cm_node(
1000 cm_node->cm_core,
1001 cm_node);
1002 }
1003 } else {
1004 struct nes_cm_event event;
1005
1006 event.cm_node = loopback;
1007 event.cm_info.rem_addr =
1008 loopback->rem_addr;
1009 event.cm_info.loc_addr =
1010 loopback->loc_addr;
1011 event.cm_info.rem_port =
1012 loopback->rem_port;
1013 event.cm_info.loc_port =
1014 loopback->loc_port;
1015 event.cm_info.cm_id = loopback->cm_id;
1016 add_ref_cm_node(loopback);
1017 loopback->state = NES_CM_STATE_CLOSED;
1018 cm_event_connect_error(&event);
1019 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1020
1021 rem_ref_cm_node(cm_node->cm_core,
1022 cm_node);
1023
1024 }
1025 }
1026 }
1027 }
1028
1029 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1030 if (!atomic_dec_return(&listener->ref_count)) {
1031 list_del(&listener->list);
1032
1033 /* decrement our listen node count */
1034 atomic_dec(&cm_core->listen_node_cnt);
1035
1036 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1037
1038 if (listener->nesvnic) {
1039 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1040 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1041 }
1042
1043 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1044
1045 kfree(listener);
1046 listener = NULL;
1047 ret = 0;
1048 atomic_inc(&cm_listens_destroyed);
1049 } else {
1050 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1051 }
1052 if (listener) {
1053 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1054 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1055 " with non-zero pending accepts=%u\n",
1056 listener, atomic_read(&listener->pend_accepts_cnt));
1057 }
1058
1059 return ret;
1060 }
1061
1062
1063 /**
1064 * mini_cm_del_listen
1065 */
1066 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1067 struct nes_cm_listener *listener)
1068 {
1069 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1070 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1071 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1072 }
1073
1074
1075 /**
1076 * mini_cm_accelerated
1077 */
1078 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1079 struct nes_cm_node *cm_node)
1080 {
1081 u32 was_timer_set;
1082 cm_node->accelerated = 1;
1083
1084 if (cm_node->accept_pend) {
1085 BUG_ON(!cm_node->listener);
1086 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1087 cm_node->accept_pend = 0;
1088 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1089 }
1090
1091 was_timer_set = timer_pending(&cm_core->tcp_timer);
1092 if (!was_timer_set) {
1093 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1094 add_timer(&cm_core->tcp_timer);
1095 }
1096
1097 return 0;
1098 }
1099
1100
1101 /**
1102 * nes_addr_resolve_neigh
1103 */
1104 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1105 {
1106 struct rtable *rt;
1107 struct flowi fl;
1108 struct neighbour *neigh;
1109 int rc = arpindex;
1110 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1111
1112 memset(&fl, 0, sizeof fl);
1113 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1114 if (ip_route_output_key(&init_net, &rt, &fl)) {
1115 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1116 __func__, dst_ip);
1117 return rc;
1118 }
1119
1120 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1121 if (neigh) {
1122 if (neigh->nud_state & NUD_VALID) {
1123 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1124 " is %pM, Gateway is 0x%08X \n", dst_ip,
1125 neigh->ha, ntohl(rt->rt_gateway));
1126
1127 if (arpindex >= 0) {
1128 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1129 neigh->ha, ETH_ALEN)){
1130 /* Mac address same as in nes_arp_table */
1131 neigh_release(neigh);
1132 ip_rt_put(rt);
1133 return rc;
1134 }
1135
1136 nes_manage_arp_cache(nesvnic->netdev,
1137 nesadapter->arp_table[arpindex].mac_addr,
1138 dst_ip, NES_ARP_DELETE);
1139 }
1140
1141 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1142 dst_ip, NES_ARP_ADD);
1143 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1144 NES_ARP_RESOLVE);
1145 }
1146 neigh_release(neigh);
1147 }
1148
1149 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1150 neigh_event_send(rt->dst.neighbour, NULL);
1151
1152 ip_rt_put(rt);
1153 return rc;
1154 }
1155
1156 /**
1157 * make_cm_node - create a new instance of a cm node
1158 */
1159 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1160 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1161 struct nes_cm_listener *listener)
1162 {
1163 struct nes_cm_node *cm_node;
1164 struct timespec ts;
1165 int oldarpindex = 0;
1166 int arpindex = 0;
1167 struct nes_device *nesdev;
1168 struct nes_adapter *nesadapter;
1169
1170 /* create an hte and cm_node for this instance */
1171 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1172 if (!cm_node)
1173 return NULL;
1174
1175 /* set our node specific transport info */
1176 cm_node->loc_addr = cm_info->loc_addr;
1177 cm_node->rem_addr = cm_info->rem_addr;
1178 cm_node->loc_port = cm_info->loc_port;
1179 cm_node->rem_port = cm_info->rem_port;
1180 cm_node->send_write0 = send_first;
1181 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1182 &cm_node->loc_addr, cm_node->loc_port,
1183 &cm_node->rem_addr, cm_node->rem_port);
1184 cm_node->listener = listener;
1185 cm_node->netdev = nesvnic->netdev;
1186 cm_node->cm_id = cm_info->cm_id;
1187 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1188
1189 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1190 cm_node->cm_id);
1191
1192 spin_lock_init(&cm_node->retrans_list_lock);
1193
1194 cm_node->loopbackpartner = NULL;
1195 atomic_set(&cm_node->ref_count, 1);
1196 /* associate our parent CM core */
1197 cm_node->cm_core = cm_core;
1198 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1199 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1200 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1201 NES_CM_DEFAULT_RCV_WND_SCALE;
1202 ts = current_kernel_time();
1203 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1204 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1205 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1206 cm_node->tcp_cntxt.rcv_nxt = 0;
1207 /* get a unique session ID , add thread_id to an upcounter to handle race */
1208 atomic_inc(&cm_core->node_cnt);
1209 cm_node->conn_type = cm_info->conn_type;
1210 cm_node->apbvt_set = 0;
1211 cm_node->accept_pend = 0;
1212
1213 cm_node->nesvnic = nesvnic;
1214 /* get some device handles, for arp lookup */
1215 nesdev = nesvnic->nesdev;
1216 nesadapter = nesdev->nesadapter;
1217
1218 cm_node->loopbackpartner = NULL;
1219
1220 /* get the mac addr for the remote node */
1221 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1222 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1223 else {
1224 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1225 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1226
1227 }
1228 if (arpindex < 0) {
1229 kfree(cm_node);
1230 return NULL;
1231 }
1232
1233 /* copy the mac addr to node context */
1234 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1235 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1236 cm_node->rem_mac);
1237
1238 add_hte_node(cm_core, cm_node);
1239 atomic_inc(&cm_nodes_created);
1240
1241 return cm_node;
1242 }
1243
1244
1245 /**
1246 * add_ref_cm_node - destroy an instance of a cm node
1247 */
1248 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1249 {
1250 atomic_inc(&cm_node->ref_count);
1251 return 0;
1252 }
1253
1254
1255 /**
1256 * rem_ref_cm_node - destroy an instance of a cm node
1257 */
1258 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1259 struct nes_cm_node *cm_node)
1260 {
1261 unsigned long flags;
1262 struct nes_qp *nesqp;
1263
1264 if (!cm_node)
1265 return -EINVAL;
1266
1267 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1268 if (atomic_dec_return(&cm_node->ref_count)) {
1269 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1270 return 0;
1271 }
1272 list_del(&cm_node->list);
1273 atomic_dec(&cm_core->ht_node_cnt);
1274 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1275
1276 /* if the node is destroyed before connection was accelerated */
1277 if (!cm_node->accelerated && cm_node->accept_pend) {
1278 BUG_ON(!cm_node->listener);
1279 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1280 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1281 }
1282 WARN_ON(cm_node->send_entry);
1283 if (cm_node->recv_entry)
1284 handle_recv_entry(cm_node, 0);
1285 if (cm_node->listener) {
1286 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1287 } else {
1288 if (cm_node->apbvt_set && cm_node->nesvnic) {
1289 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1290 PCI_FUNC(
1291 cm_node->nesvnic->nesdev->pcidev->devfn),
1292 NES_MANAGE_APBVT_DEL);
1293 }
1294 }
1295
1296 atomic_dec(&cm_core->node_cnt);
1297 atomic_inc(&cm_nodes_destroyed);
1298 nesqp = cm_node->nesqp;
1299 if (nesqp) {
1300 nesqp->cm_node = NULL;
1301 nes_rem_ref(&nesqp->ibqp);
1302 cm_node->nesqp = NULL;
1303 }
1304
1305 kfree(cm_node);
1306 return 0;
1307 }
1308
1309 /**
1310 * process_options
1311 */
1312 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1313 u32 optionsize, u32 syn_packet)
1314 {
1315 u32 tmp;
1316 u32 offset = 0;
1317 union all_known_options *all_options;
1318 char got_mss_option = 0;
1319
1320 while (offset < optionsize) {
1321 all_options = (union all_known_options *)(optionsloc + offset);
1322 switch (all_options->as_base.optionnum) {
1323 case OPTION_NUMBER_END:
1324 offset = optionsize;
1325 break;
1326 case OPTION_NUMBER_NONE:
1327 offset += 1;
1328 continue;
1329 case OPTION_NUMBER_MSS:
1330 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1331 "Size: %d\n", __func__,
1332 all_options->as_mss.length, offset, optionsize);
1333 got_mss_option = 1;
1334 if (all_options->as_mss.length != 4) {
1335 return 1;
1336 } else {
1337 tmp = ntohs(all_options->as_mss.mss);
1338 if (tmp > 0 && tmp <
1339 cm_node->tcp_cntxt.mss)
1340 cm_node->tcp_cntxt.mss = tmp;
1341 }
1342 break;
1343 case OPTION_NUMBER_WINDOW_SCALE:
1344 cm_node->tcp_cntxt.snd_wscale =
1345 all_options->as_windowscale.shiftcount;
1346 break;
1347 case OPTION_NUMBER_WRITE0:
1348 cm_node->send_write0 = 1;
1349 break;
1350 default:
1351 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1352 all_options->as_base.optionnum);
1353 break;
1354 }
1355 offset += all_options->as_base.length;
1356 }
1357 if ((!got_mss_option) && (syn_packet))
1358 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1359 return 0;
1360 }
1361
1362 static void drop_packet(struct sk_buff *skb)
1363 {
1364 atomic_inc(&cm_accel_dropped_pkts);
1365 dev_kfree_skb_any(skb);
1366 }
1367
1368 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1369 {
1370 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1371 "refcnt=%d\n", cm_node, cm_node->state,
1372 atomic_read(&cm_node->ref_count));
1373 switch (cm_node->state) {
1374 case NES_CM_STATE_SYN_RCVD:
1375 case NES_CM_STATE_SYN_SENT:
1376 case NES_CM_STATE_ESTABLISHED:
1377 case NES_CM_STATE_MPAREJ_RCVD:
1378 cm_node->tcp_cntxt.rcv_nxt++;
1379 cleanup_retrans_entry(cm_node);
1380 cm_node->state = NES_CM_STATE_LAST_ACK;
1381 send_fin(cm_node, NULL);
1382 break;
1383 case NES_CM_STATE_MPAREQ_SENT:
1384 create_event(cm_node, NES_CM_EVENT_ABORTED);
1385 cm_node->tcp_cntxt.rcv_nxt++;
1386 cleanup_retrans_entry(cm_node);
1387 cm_node->state = NES_CM_STATE_CLOSED;
1388 add_ref_cm_node(cm_node);
1389 send_reset(cm_node, NULL);
1390 break;
1391 case NES_CM_STATE_FIN_WAIT1:
1392 cm_node->tcp_cntxt.rcv_nxt++;
1393 cleanup_retrans_entry(cm_node);
1394 cm_node->state = NES_CM_STATE_CLOSING;
1395 send_ack(cm_node, NULL);
1396 /* Wait for ACK as this is simultanous close..
1397 * After we receive ACK, do not send anything..
1398 * Just rm the node.. Done.. */
1399 break;
1400 case NES_CM_STATE_FIN_WAIT2:
1401 cm_node->tcp_cntxt.rcv_nxt++;
1402 cleanup_retrans_entry(cm_node);
1403 cm_node->state = NES_CM_STATE_TIME_WAIT;
1404 send_ack(cm_node, NULL);
1405 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1406 break;
1407 case NES_CM_STATE_TIME_WAIT:
1408 cm_node->tcp_cntxt.rcv_nxt++;
1409 cleanup_retrans_entry(cm_node);
1410 cm_node->state = NES_CM_STATE_CLOSED;
1411 rem_ref_cm_node(cm_node->cm_core, cm_node);
1412 break;
1413 case NES_CM_STATE_TSA:
1414 default:
1415 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1416 cm_node, cm_node->state);
1417 break;
1418 }
1419 }
1420
1421
1422 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1423 struct tcphdr *tcph)
1424 {
1425
1426 int reset = 0; /* whether to send reset in case of err.. */
1427 int passive_state;
1428 atomic_inc(&cm_resets_recvd);
1429 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1430 " refcnt=%d\n", cm_node, cm_node->state,
1431 atomic_read(&cm_node->ref_count));
1432 cleanup_retrans_entry(cm_node);
1433 switch (cm_node->state) {
1434 case NES_CM_STATE_SYN_SENT:
1435 case NES_CM_STATE_MPAREQ_SENT:
1436 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1437 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1438 cm_node->listener, cm_node->state);
1439 active_open_err(cm_node, skb, reset);
1440 break;
1441 case NES_CM_STATE_MPAREQ_RCVD:
1442 passive_state = atomic_add_return(1, &cm_node->passive_state);
1443 dev_kfree_skb_any(skb);
1444 break;
1445 case NES_CM_STATE_ESTABLISHED:
1446 case NES_CM_STATE_SYN_RCVD:
1447 case NES_CM_STATE_LISTENING:
1448 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1449 passive_open_err(cm_node, skb, reset);
1450 break;
1451 case NES_CM_STATE_TSA:
1452 active_open_err(cm_node, skb, reset);
1453 break;
1454 case NES_CM_STATE_CLOSED:
1455 drop_packet(skb);
1456 break;
1457 case NES_CM_STATE_FIN_WAIT2:
1458 case NES_CM_STATE_FIN_WAIT1:
1459 case NES_CM_STATE_LAST_ACK:
1460 cm_node->cm_id->rem_ref(cm_node->cm_id);
1461 case NES_CM_STATE_TIME_WAIT:
1462 cm_node->state = NES_CM_STATE_CLOSED;
1463 rem_ref_cm_node(cm_node->cm_core, cm_node);
1464 drop_packet(skb);
1465 break;
1466 default:
1467 drop_packet(skb);
1468 break;
1469 }
1470 }
1471
1472
1473 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1474 {
1475
1476 int ret = 0;
1477 int datasize = skb->len;
1478 u8 *dataloc = skb->data;
1479
1480 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1481 u32 res_type;
1482 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1483 if (ret) {
1484 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1485 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1486 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1487 "cm_node=%p listener=%p state=%d\n", __func__,
1488 __LINE__, cm_node, cm_node->listener,
1489 cm_node->state);
1490 active_open_err(cm_node, skb, 1);
1491 } else {
1492 passive_open_err(cm_node, skb, 1);
1493 }
1494 return;
1495 }
1496
1497 switch (cm_node->state) {
1498 case NES_CM_STATE_ESTABLISHED:
1499 if (res_type == NES_MPA_REQUEST_REJECT) {
1500 /*BIG problem as we are receiving the MPA.. So should
1501 * not be REJECT.. This is Passive Open.. We can
1502 * only receive it Reject for Active Open...*/
1503 WARN_ON(1);
1504 }
1505 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1506 type = NES_CM_EVENT_MPA_REQ;
1507 atomic_set(&cm_node->passive_state,
1508 NES_PASSIVE_STATE_INDICATED);
1509 break;
1510 case NES_CM_STATE_MPAREQ_SENT:
1511 cleanup_retrans_entry(cm_node);
1512 if (res_type == NES_MPA_REQUEST_REJECT) {
1513 type = NES_CM_EVENT_MPA_REJECT;
1514 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1515 } else {
1516 type = NES_CM_EVENT_CONNECTED;
1517 cm_node->state = NES_CM_STATE_TSA;
1518 }
1519
1520 break;
1521 default:
1522 WARN_ON(1);
1523 break;
1524 }
1525 dev_kfree_skb_any(skb);
1526 create_event(cm_node, type);
1527 }
1528
1529 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1530 {
1531 switch (cm_node->state) {
1532 case NES_CM_STATE_SYN_SENT:
1533 case NES_CM_STATE_MPAREQ_SENT:
1534 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1535 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1536 cm_node->listener, cm_node->state);
1537 active_open_err(cm_node, skb, 1);
1538 break;
1539 case NES_CM_STATE_ESTABLISHED:
1540 case NES_CM_STATE_SYN_RCVD:
1541 passive_open_err(cm_node, skb, 1);
1542 break;
1543 case NES_CM_STATE_TSA:
1544 default:
1545 drop_packet(skb);
1546 }
1547 }
1548
1549 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1550 struct sk_buff *skb)
1551 {
1552 int err;
1553
1554 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1555 if (err)
1556 active_open_err(cm_node, skb, 1);
1557
1558 return err;
1559 }
1560
1561 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1562 struct sk_buff *skb)
1563 {
1564 int err = 0;
1565 u32 seq;
1566 u32 ack_seq;
1567 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1568 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1569 u32 rcv_wnd;
1570 seq = ntohl(tcph->seq);
1571 ack_seq = ntohl(tcph->ack_seq);
1572 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1573 if (ack_seq != loc_seq_num)
1574 err = 1;
1575 else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
1576 err = 1;
1577 if (err) {
1578 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1579 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1580 cm_node->listener, cm_node->state);
1581 indicate_pkt_err(cm_node, skb);
1582 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1583 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1584 rcv_wnd);
1585 }
1586 return err;
1587 }
1588
1589 /*
1590 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1591 * is created with a listener or it may comein as rexmitted packet which in
1592 * that case will be just dropped.
1593 */
1594
1595 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1596 struct tcphdr *tcph)
1597 {
1598 int ret;
1599 u32 inc_sequence;
1600 int optionsize;
1601
1602 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1603 skb_trim(skb, 0);
1604 inc_sequence = ntohl(tcph->seq);
1605
1606 switch (cm_node->state) {
1607 case NES_CM_STATE_SYN_SENT:
1608 case NES_CM_STATE_MPAREQ_SENT:
1609 /* Rcvd syn on active open connection*/
1610 active_open_err(cm_node, skb, 1);
1611 break;
1612 case NES_CM_STATE_LISTENING:
1613 /* Passive OPEN */
1614 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1615 cm_node->listener->backlog) {
1616 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1617 "pressure \n");
1618 cm_backlog_drops++;
1619 passive_open_err(cm_node, skb, 0);
1620 break;
1621 }
1622 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1623 1);
1624 if (ret) {
1625 passive_open_err(cm_node, skb, 0);
1626 /* drop pkt */
1627 break;
1628 }
1629 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1630 BUG_ON(cm_node->send_entry);
1631 cm_node->accept_pend = 1;
1632 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1633
1634 cm_node->state = NES_CM_STATE_SYN_RCVD;
1635 send_syn(cm_node, 1, skb);
1636 break;
1637 case NES_CM_STATE_CLOSED:
1638 cleanup_retrans_entry(cm_node);
1639 add_ref_cm_node(cm_node);
1640 send_reset(cm_node, skb);
1641 break;
1642 case NES_CM_STATE_TSA:
1643 case NES_CM_STATE_ESTABLISHED:
1644 case NES_CM_STATE_FIN_WAIT1:
1645 case NES_CM_STATE_FIN_WAIT2:
1646 case NES_CM_STATE_MPAREQ_RCVD:
1647 case NES_CM_STATE_LAST_ACK:
1648 case NES_CM_STATE_CLOSING:
1649 case NES_CM_STATE_UNKNOWN:
1650 default:
1651 drop_packet(skb);
1652 break;
1653 }
1654 }
1655
1656 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1657 struct tcphdr *tcph)
1658 {
1659
1660 int ret;
1661 u32 inc_sequence;
1662 int optionsize;
1663
1664 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1665 skb_trim(skb, 0);
1666 inc_sequence = ntohl(tcph->seq);
1667 switch (cm_node->state) {
1668 case NES_CM_STATE_SYN_SENT:
1669 cleanup_retrans_entry(cm_node);
1670 /* active open */
1671 if (check_syn(cm_node, tcph, skb))
1672 return;
1673 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1674 /* setup options */
1675 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1676 if (ret) {
1677 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1678 cm_node);
1679 break;
1680 }
1681 cleanup_retrans_entry(cm_node);
1682 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1683 send_mpa_request(cm_node, skb);
1684 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1685 break;
1686 case NES_CM_STATE_MPAREQ_RCVD:
1687 /* passive open, so should not be here */
1688 passive_open_err(cm_node, skb, 1);
1689 break;
1690 case NES_CM_STATE_LISTENING:
1691 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1692 cleanup_retrans_entry(cm_node);
1693 cm_node->state = NES_CM_STATE_CLOSED;
1694 send_reset(cm_node, skb);
1695 break;
1696 case NES_CM_STATE_CLOSED:
1697 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1698 cleanup_retrans_entry(cm_node);
1699 add_ref_cm_node(cm_node);
1700 send_reset(cm_node, skb);
1701 break;
1702 case NES_CM_STATE_ESTABLISHED:
1703 case NES_CM_STATE_FIN_WAIT1:
1704 case NES_CM_STATE_FIN_WAIT2:
1705 case NES_CM_STATE_LAST_ACK:
1706 case NES_CM_STATE_TSA:
1707 case NES_CM_STATE_CLOSING:
1708 case NES_CM_STATE_UNKNOWN:
1709 case NES_CM_STATE_MPAREQ_SENT:
1710 default:
1711 drop_packet(skb);
1712 break;
1713 }
1714 }
1715
1716 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1717 struct tcphdr *tcph)
1718 {
1719 int datasize = 0;
1720 u32 inc_sequence;
1721 int ret = 0;
1722 int optionsize;
1723 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1724
1725 if (check_seq(cm_node, tcph, skb))
1726 return -EINVAL;
1727
1728 skb_pull(skb, tcph->doff << 2);
1729 inc_sequence = ntohl(tcph->seq);
1730 datasize = skb->len;
1731 switch (cm_node->state) {
1732 case NES_CM_STATE_SYN_RCVD:
1733 /* Passive OPEN */
1734 cleanup_retrans_entry(cm_node);
1735 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1736 if (ret)
1737 break;
1738 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1739 cm_node->state = NES_CM_STATE_ESTABLISHED;
1740 if (datasize) {
1741 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1742 handle_rcv_mpa(cm_node, skb);
1743 } else /* rcvd ACK only */
1744 dev_kfree_skb_any(skb);
1745 break;
1746 case NES_CM_STATE_ESTABLISHED:
1747 /* Passive OPEN */
1748 cleanup_retrans_entry(cm_node);
1749 if (datasize) {
1750 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1751 handle_rcv_mpa(cm_node, skb);
1752 } else
1753 drop_packet(skb);
1754 break;
1755 case NES_CM_STATE_MPAREQ_SENT:
1756 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1757 if (datasize) {
1758 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1759 handle_rcv_mpa(cm_node, skb);
1760 } else /* Could be just an ack pkt.. */
1761 dev_kfree_skb_any(skb);
1762 break;
1763 case NES_CM_STATE_LISTENING:
1764 cleanup_retrans_entry(cm_node);
1765 cm_node->state = NES_CM_STATE_CLOSED;
1766 send_reset(cm_node, skb);
1767 break;
1768 case NES_CM_STATE_CLOSED:
1769 cleanup_retrans_entry(cm_node);
1770 add_ref_cm_node(cm_node);
1771 send_reset(cm_node, skb);
1772 break;
1773 case NES_CM_STATE_LAST_ACK:
1774 case NES_CM_STATE_CLOSING:
1775 cleanup_retrans_entry(cm_node);
1776 cm_node->state = NES_CM_STATE_CLOSED;
1777 cm_node->cm_id->rem_ref(cm_node->cm_id);
1778 rem_ref_cm_node(cm_node->cm_core, cm_node);
1779 drop_packet(skb);
1780 break;
1781 case NES_CM_STATE_FIN_WAIT1:
1782 cleanup_retrans_entry(cm_node);
1783 drop_packet(skb);
1784 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1785 break;
1786 case NES_CM_STATE_SYN_SENT:
1787 case NES_CM_STATE_FIN_WAIT2:
1788 case NES_CM_STATE_TSA:
1789 case NES_CM_STATE_MPAREQ_RCVD:
1790 case NES_CM_STATE_UNKNOWN:
1791 default:
1792 cleanup_retrans_entry(cm_node);
1793 drop_packet(skb);
1794 break;
1795 }
1796 return ret;
1797 }
1798
1799
1800
1801 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1802 struct sk_buff *skb, int optionsize, int passive)
1803 {
1804 u8 *optionsloc = (u8 *)&tcph[1];
1805 if (optionsize) {
1806 if (process_options(cm_node, optionsloc, optionsize,
1807 (u32)tcph->syn)) {
1808 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1809 __func__, cm_node);
1810 if (passive)
1811 passive_open_err(cm_node, skb, 1);
1812 else
1813 active_open_err(cm_node, skb, 1);
1814 return 1;
1815 }
1816 }
1817
1818 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1819 cm_node->tcp_cntxt.snd_wscale;
1820
1821 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1822 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1823 return 0;
1824 }
1825
1826 /*
1827 * active_open_err() will send reset() if flag set..
1828 * It will also send ABORT event.
1829 */
1830
1831 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1832 int reset)
1833 {
1834 cleanup_retrans_entry(cm_node);
1835 if (reset) {
1836 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1837 "state=%d\n", cm_node, cm_node->state);
1838 add_ref_cm_node(cm_node);
1839 send_reset(cm_node, skb);
1840 } else
1841 dev_kfree_skb_any(skb);
1842
1843 cm_node->state = NES_CM_STATE_CLOSED;
1844 create_event(cm_node, NES_CM_EVENT_ABORTED);
1845 }
1846
1847 /*
1848 * passive_open_err() will either do a reset() or will free up the skb and
1849 * remove the cm_node.
1850 */
1851
1852 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1853 int reset)
1854 {
1855 cleanup_retrans_entry(cm_node);
1856 cm_node->state = NES_CM_STATE_CLOSED;
1857 if (reset) {
1858 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1859 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1860 send_reset(cm_node, skb);
1861 } else {
1862 dev_kfree_skb_any(skb);
1863 rem_ref_cm_node(cm_node->cm_core, cm_node);
1864 }
1865 }
1866
1867 /*
1868 * free_retrans_entry() routines assumes that the retrans_list_lock has
1869 * been acquired before calling.
1870 */
1871 static void free_retrans_entry(struct nes_cm_node *cm_node)
1872 {
1873 struct nes_timer_entry *send_entry;
1874 send_entry = cm_node->send_entry;
1875 if (send_entry) {
1876 cm_node->send_entry = NULL;
1877 dev_kfree_skb_any(send_entry->skb);
1878 kfree(send_entry);
1879 rem_ref_cm_node(cm_node->cm_core, cm_node);
1880 }
1881 }
1882
1883 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1884 {
1885 unsigned long flags;
1886
1887 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1888 free_retrans_entry(cm_node);
1889 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1890 }
1891
1892 /**
1893 * process_packet
1894 * Returns skb if to be freed, else it will return NULL if already used..
1895 */
1896 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1897 struct nes_cm_core *cm_core)
1898 {
1899 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1900 struct tcphdr *tcph = tcp_hdr(skb);
1901 u32 fin_set = 0;
1902 int ret = 0;
1903 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1904
1905 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1906 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1907 tcph->ack, tcph->rst, tcph->fin);
1908
1909 if (tcph->rst)
1910 pkt_type = NES_PKT_TYPE_RST;
1911 else if (tcph->syn) {
1912 pkt_type = NES_PKT_TYPE_SYN;
1913 if (tcph->ack)
1914 pkt_type = NES_PKT_TYPE_SYNACK;
1915 } else if (tcph->ack)
1916 pkt_type = NES_PKT_TYPE_ACK;
1917 if (tcph->fin)
1918 fin_set = 1;
1919
1920 switch (pkt_type) {
1921 case NES_PKT_TYPE_SYN:
1922 handle_syn_pkt(cm_node, skb, tcph);
1923 break;
1924 case NES_PKT_TYPE_SYNACK:
1925 handle_synack_pkt(cm_node, skb, tcph);
1926 break;
1927 case NES_PKT_TYPE_ACK:
1928 ret = handle_ack_pkt(cm_node, skb, tcph);
1929 if (fin_set && !ret)
1930 handle_fin_pkt(cm_node);
1931 break;
1932 case NES_PKT_TYPE_RST:
1933 handle_rst_pkt(cm_node, skb, tcph);
1934 break;
1935 default:
1936 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
1937 handle_fin_pkt(cm_node);
1938 drop_packet(skb);
1939 break;
1940 }
1941 }
1942
1943 /**
1944 * mini_cm_listen - create a listen node with params
1945 */
1946 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1947 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1948 {
1949 struct nes_cm_listener *listener;
1950 unsigned long flags;
1951
1952 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1953 cm_info->loc_addr, cm_info->loc_port);
1954
1955 /* cannot have multiple matching listeners */
1956 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1957 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1958 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1959 /* find automatically incs ref count ??? */
1960 atomic_dec(&listener->ref_count);
1961 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1962 return NULL;
1963 }
1964
1965 if (!listener) {
1966 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1967 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1968 if (!listener) {
1969 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1970 return NULL;
1971 }
1972
1973 listener->loc_addr = htonl(cm_info->loc_addr);
1974 listener->loc_port = htons(cm_info->loc_port);
1975 listener->reused_node = 0;
1976
1977 atomic_set(&listener->ref_count, 1);
1978 }
1979 /* pasive case */
1980 /* find already inc'ed the ref count */
1981 else {
1982 listener->reused_node = 1;
1983 }
1984
1985 listener->cm_id = cm_info->cm_id;
1986 atomic_set(&listener->pend_accepts_cnt, 0);
1987 listener->cm_core = cm_core;
1988 listener->nesvnic = nesvnic;
1989 atomic_inc(&cm_core->node_cnt);
1990
1991 listener->conn_type = cm_info->conn_type;
1992 listener->backlog = cm_info->backlog;
1993 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1994
1995 if (!listener->reused_node) {
1996 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1997 list_add(&listener->list, &cm_core->listen_list.list);
1998 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1999 atomic_inc(&cm_core->listen_node_cnt);
2000 }
2001
2002 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2003 " listener = %p, backlog = %d, cm_id = %p.\n",
2004 cm_info->loc_addr, cm_info->loc_port,
2005 listener, listener->backlog, listener->cm_id);
2006
2007 return listener;
2008 }
2009
2010
2011 /**
2012 * mini_cm_connect - make a connection node with params
2013 */
2014 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2015 struct nes_vnic *nesvnic, u16 private_data_len,
2016 void *private_data, struct nes_cm_info *cm_info)
2017 {
2018 int ret = 0;
2019 struct nes_cm_node *cm_node;
2020 struct nes_cm_listener *loopbackremotelistener;
2021 struct nes_cm_node *loopbackremotenode;
2022 struct nes_cm_info loopback_cm_info;
2023 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
2024 struct ietf_mpa_frame *mpa_frame = NULL;
2025
2026 /* create a CM connection node */
2027 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2028 if (!cm_node)
2029 return NULL;
2030 mpa_frame = &cm_node->mpa_frame;
2031 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
2032 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2033 mpa_frame->rev = IETF_MPA_VERSION;
2034 mpa_frame->priv_data_len = htons(private_data_len);
2035
2036 /* set our node side to client (active) side */
2037 cm_node->tcp_cntxt.client = 1;
2038 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2039
2040 if (cm_info->loc_addr == cm_info->rem_addr) {
2041 loopbackremotelistener = find_listener(cm_core,
2042 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2043 NES_CM_LISTENER_ACTIVE_STATE);
2044 if (loopbackremotelistener == NULL) {
2045 create_event(cm_node, NES_CM_EVENT_ABORTED);
2046 } else {
2047 loopback_cm_info = *cm_info;
2048 loopback_cm_info.loc_port = cm_info->rem_port;
2049 loopback_cm_info.rem_port = cm_info->loc_port;
2050 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2051 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2052 &loopback_cm_info, loopbackremotelistener);
2053 if (!loopbackremotenode) {
2054 rem_ref_cm_node(cm_node->cm_core, cm_node);
2055 return NULL;
2056 }
2057 atomic_inc(&cm_loopbacks);
2058 loopbackremotenode->loopbackpartner = cm_node;
2059 loopbackremotenode->tcp_cntxt.rcv_wscale =
2060 NES_CM_DEFAULT_RCV_WND_SCALE;
2061 cm_node->loopbackpartner = loopbackremotenode;
2062 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2063 private_data_len);
2064 loopbackremotenode->mpa_frame_size = private_data_len;
2065
2066 /* we are done handling this state. */
2067 /* set node to a TSA state */
2068 cm_node->state = NES_CM_STATE_TSA;
2069 cm_node->tcp_cntxt.rcv_nxt =
2070 loopbackremotenode->tcp_cntxt.loc_seq_num;
2071 loopbackremotenode->tcp_cntxt.rcv_nxt =
2072 cm_node->tcp_cntxt.loc_seq_num;
2073 cm_node->tcp_cntxt.max_snd_wnd =
2074 loopbackremotenode->tcp_cntxt.rcv_wnd;
2075 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2076 cm_node->tcp_cntxt.rcv_wnd;
2077 cm_node->tcp_cntxt.snd_wnd =
2078 loopbackremotenode->tcp_cntxt.rcv_wnd;
2079 loopbackremotenode->tcp_cntxt.snd_wnd =
2080 cm_node->tcp_cntxt.rcv_wnd;
2081 cm_node->tcp_cntxt.snd_wscale =
2082 loopbackremotenode->tcp_cntxt.rcv_wscale;
2083 loopbackremotenode->tcp_cntxt.snd_wscale =
2084 cm_node->tcp_cntxt.rcv_wscale;
2085 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2086 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2087 }
2088 return cm_node;
2089 }
2090
2091 /* set our node side to client (active) side */
2092 cm_node->tcp_cntxt.client = 1;
2093 /* init our MPA frame ptr */
2094 memcpy(mpa_frame->priv_data, private_data, private_data_len);
2095
2096 cm_node->mpa_frame_size = mpa_frame_size;
2097
2098 /* send a syn and goto syn sent state */
2099 cm_node->state = NES_CM_STATE_SYN_SENT;
2100 ret = send_syn(cm_node, 0, NULL);
2101
2102 if (ret) {
2103 /* error in sending the syn free up the cm_node struct */
2104 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2105 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2106 cm_node->rem_addr, cm_node->rem_port, cm_node,
2107 cm_node->cm_id);
2108 rem_ref_cm_node(cm_node->cm_core, cm_node);
2109 cm_node = NULL;
2110 }
2111
2112 if (cm_node)
2113 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2114 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2115 cm_node->rem_addr, cm_node->rem_port, cm_node,
2116 cm_node->cm_id);
2117
2118 return cm_node;
2119 }
2120
2121
2122 /**
2123 * mini_cm_accept - accept a connection
2124 * This function is never called
2125 */
2126 static int mini_cm_accept(struct nes_cm_core *cm_core,
2127 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2128 {
2129 return 0;
2130 }
2131
2132
2133 /**
2134 * mini_cm_reject - reject and teardown a connection
2135 */
2136 static int mini_cm_reject(struct nes_cm_core *cm_core,
2137 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2138 {
2139 int ret = 0;
2140 int err = 0;
2141 int passive_state;
2142 struct nes_cm_event event;
2143 struct iw_cm_id *cm_id = cm_node->cm_id;
2144 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2145
2146 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2147 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2148
2149 if (cm_node->tcp_cntxt.client)
2150 return ret;
2151 cleanup_retrans_entry(cm_node);
2152
2153 if (!loopback) {
2154 passive_state = atomic_add_return(1, &cm_node->passive_state);
2155 if (passive_state == NES_SEND_RESET_EVENT) {
2156 cm_node->state = NES_CM_STATE_CLOSED;
2157 rem_ref_cm_node(cm_core, cm_node);
2158 } else {
2159 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2160 rem_ref_cm_node(cm_core, cm_node);
2161 } else {
2162 ret = send_mpa_reject(cm_node);
2163 if (ret) {
2164 cm_node->state = NES_CM_STATE_CLOSED;
2165 err = send_reset(cm_node, NULL);
2166 if (err)
2167 WARN_ON(1);
2168 } else
2169 cm_id->add_ref(cm_id);
2170 }
2171 }
2172 } else {
2173 cm_node->cm_id = NULL;
2174 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2175 rem_ref_cm_node(cm_core, cm_node);
2176 rem_ref_cm_node(cm_core, loopback);
2177 } else {
2178 event.cm_node = loopback;
2179 event.cm_info.rem_addr = loopback->rem_addr;
2180 event.cm_info.loc_addr = loopback->loc_addr;
2181 event.cm_info.rem_port = loopback->rem_port;
2182 event.cm_info.loc_port = loopback->loc_port;
2183 event.cm_info.cm_id = loopback->cm_id;
2184 cm_event_mpa_reject(&event);
2185 rem_ref_cm_node(cm_core, cm_node);
2186 loopback->state = NES_CM_STATE_CLOSING;
2187
2188 cm_id = loopback->cm_id;
2189 rem_ref_cm_node(cm_core, loopback);
2190 cm_id->rem_ref(cm_id);
2191 }
2192 }
2193
2194 return ret;
2195 }
2196
2197
2198 /**
2199 * mini_cm_close
2200 */
2201 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2202 {
2203 int ret = 0;
2204
2205 if (!cm_core || !cm_node)
2206 return -EINVAL;
2207
2208 switch (cm_node->state) {
2209 case NES_CM_STATE_SYN_RCVD:
2210 case NES_CM_STATE_SYN_SENT:
2211 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2212 case NES_CM_STATE_ESTABLISHED:
2213 case NES_CM_STATE_ACCEPTING:
2214 case NES_CM_STATE_MPAREQ_SENT:
2215 case NES_CM_STATE_MPAREQ_RCVD:
2216 cleanup_retrans_entry(cm_node);
2217 send_reset(cm_node, NULL);
2218 break;
2219 case NES_CM_STATE_CLOSE_WAIT:
2220 cm_node->state = NES_CM_STATE_LAST_ACK;
2221 send_fin(cm_node, NULL);
2222 break;
2223 case NES_CM_STATE_FIN_WAIT1:
2224 case NES_CM_STATE_FIN_WAIT2:
2225 case NES_CM_STATE_LAST_ACK:
2226 case NES_CM_STATE_TIME_WAIT:
2227 case NES_CM_STATE_CLOSING:
2228 ret = -1;
2229 break;
2230 case NES_CM_STATE_LISTENING:
2231 cleanup_retrans_entry(cm_node);
2232 send_reset(cm_node, NULL);
2233 break;
2234 case NES_CM_STATE_MPAREJ_RCVD:
2235 case NES_CM_STATE_UNKNOWN:
2236 case NES_CM_STATE_INITED:
2237 case NES_CM_STATE_CLOSED:
2238 case NES_CM_STATE_LISTENER_DESTROYED:
2239 ret = rem_ref_cm_node(cm_core, cm_node);
2240 break;
2241 case NES_CM_STATE_TSA:
2242 if (cm_node->send_entry)
2243 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2244 "send_entry=%p\n", cm_node->send_entry);
2245 ret = rem_ref_cm_node(cm_core, cm_node);
2246 break;
2247 }
2248 return ret;
2249 }
2250
2251
2252 /**
2253 * recv_pkt - recv an ETHERNET packet, and process it through CM
2254 * node state machine
2255 */
2256 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2257 struct nes_vnic *nesvnic, struct sk_buff *skb)
2258 {
2259 struct nes_cm_node *cm_node = NULL;
2260 struct nes_cm_listener *listener = NULL;
2261 struct iphdr *iph;
2262 struct tcphdr *tcph;
2263 struct nes_cm_info nfo;
2264 int skb_handled = 1;
2265 __be32 tmp_daddr, tmp_saddr;
2266
2267 if (!skb)
2268 return 0;
2269 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2270 return 0;
2271 }
2272
2273 iph = (struct iphdr *)skb->data;
2274 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2275
2276 nfo.loc_addr = ntohl(iph->daddr);
2277 nfo.loc_port = ntohs(tcph->dest);
2278 nfo.rem_addr = ntohl(iph->saddr);
2279 nfo.rem_port = ntohs(tcph->source);
2280
2281 tmp_daddr = cpu_to_be32(iph->daddr);
2282 tmp_saddr = cpu_to_be32(iph->saddr);
2283
2284 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2285 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2286
2287 do {
2288 cm_node = find_node(cm_core,
2289 nfo.rem_port, nfo.rem_addr,
2290 nfo.loc_port, nfo.loc_addr);
2291
2292 if (!cm_node) {
2293 /* Only type of packet accepted are for */
2294 /* the PASSIVE open (syn only) */
2295 if ((!tcph->syn) || (tcph->ack)) {
2296 skb_handled = 0;
2297 break;
2298 }
2299 listener = find_listener(cm_core, nfo.loc_addr,
2300 nfo.loc_port,
2301 NES_CM_LISTENER_ACTIVE_STATE);
2302 if (!listener) {
2303 nfo.cm_id = NULL;
2304 nfo.conn_type = 0;
2305 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2306 skb_handled = 0;
2307 break;
2308 }
2309 nfo.cm_id = listener->cm_id;
2310 nfo.conn_type = listener->conn_type;
2311 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2312 listener);
2313 if (!cm_node) {
2314 nes_debug(NES_DBG_CM, "Unable to allocate "
2315 "node\n");
2316 cm_packets_dropped++;
2317 atomic_dec(&listener->ref_count);
2318 dev_kfree_skb_any(skb);
2319 break;
2320 }
2321 if (!tcph->rst && !tcph->fin) {
2322 cm_node->state = NES_CM_STATE_LISTENING;
2323 } else {
2324 cm_packets_dropped++;
2325 rem_ref_cm_node(cm_core, cm_node);
2326 dev_kfree_skb_any(skb);
2327 break;
2328 }
2329 add_ref_cm_node(cm_node);
2330 } else if (cm_node->state == NES_CM_STATE_TSA) {
2331 rem_ref_cm_node(cm_core, cm_node);
2332 atomic_inc(&cm_accel_dropped_pkts);
2333 dev_kfree_skb_any(skb);
2334 break;
2335 }
2336 skb_reset_network_header(skb);
2337 skb_set_transport_header(skb, sizeof(*tcph));
2338 skb->len = ntohs(iph->tot_len);
2339 process_packet(cm_node, skb, cm_core);
2340 rem_ref_cm_node(cm_core, cm_node);
2341 } while (0);
2342 return skb_handled;
2343 }
2344
2345
2346 /**
2347 * nes_cm_alloc_core - allocate a top level instance of a cm core
2348 */
2349 static struct nes_cm_core *nes_cm_alloc_core(void)
2350 {
2351 struct nes_cm_core *cm_core;
2352
2353 /* setup the CM core */
2354 /* alloc top level core control structure */
2355 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2356 if (!cm_core)
2357 return NULL;
2358
2359 INIT_LIST_HEAD(&cm_core->connected_nodes);
2360 init_timer(&cm_core->tcp_timer);
2361 cm_core->tcp_timer.function = nes_cm_timer_tick;
2362
2363 cm_core->mtu = NES_CM_DEFAULT_MTU;
2364 cm_core->state = NES_CM_STATE_INITED;
2365 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2366
2367 atomic_set(&cm_core->events_posted, 0);
2368
2369 cm_core->api = &nes_cm_api;
2370
2371 spin_lock_init(&cm_core->ht_lock);
2372 spin_lock_init(&cm_core->listen_list_lock);
2373
2374 INIT_LIST_HEAD(&cm_core->listen_list.list);
2375
2376 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2377
2378 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2379 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2380 cm_core->post_event = nes_cm_post_event;
2381 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2382 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2383
2384 print_core(cm_core);
2385 return cm_core;
2386 }
2387
2388
2389 /**
2390 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2391 */
2392 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2393 {
2394 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2395
2396 if (!cm_core)
2397 return -EINVAL;
2398
2399 barrier();
2400
2401 if (timer_pending(&cm_core->tcp_timer)) {
2402 del_timer(&cm_core->tcp_timer);
2403 }
2404
2405 destroy_workqueue(cm_core->event_wq);
2406 destroy_workqueue(cm_core->disconn_wq);
2407 nes_debug(NES_DBG_CM, "\n");
2408 kfree(cm_core);
2409
2410 return 0;
2411 }
2412
2413
2414 /**
2415 * mini_cm_get
2416 */
2417 static int mini_cm_get(struct nes_cm_core *cm_core)
2418 {
2419 return cm_core->state;
2420 }
2421
2422
2423 /**
2424 * mini_cm_set
2425 */
2426 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2427 {
2428 int ret = 0;
2429
2430 switch (type) {
2431 case NES_CM_SET_PKT_SIZE:
2432 cm_core->mtu = value;
2433 break;
2434 case NES_CM_SET_FREE_PKT_Q_SIZE:
2435 cm_core->free_tx_pkt_max = value;
2436 break;
2437 default:
2438 /* unknown set option */
2439 ret = -EINVAL;
2440 }
2441
2442 return ret;
2443 }
2444
2445
2446 /**
2447 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2448 * successfully exchanged when this is called
2449 */
2450 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2451 {
2452 int ret = 0;
2453
2454 if (!nesqp)
2455 return -EINVAL;
2456
2457 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2458 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2459 NES_QPCONTEXT_MISC_DROS);
2460
2461 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2462 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2463
2464 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2465
2466 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2467
2468 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2469 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2470
2471 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2472 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2473 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2474
2475 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2476 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2477 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2478
2479 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2480 nesqp->nesqp_context->ts_recent = 0;
2481 nesqp->nesqp_context->ts_age = 0;
2482 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2483 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2484 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2485 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2486 cm_node->tcp_cntxt.rcv_wscale);
2487 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2488 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2489 nesqp->nesqp_context->srtt = 0;
2490 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2491 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2492 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2493 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2494 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2495 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2496
2497 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2498 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2499 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2500 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2501 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2502 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2503 le32_to_cpu(nesqp->nesqp_context->misc));
2504 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2505 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2506 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2507
2508 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2509 cm_node->state = NES_CM_STATE_TSA;
2510
2511 return ret;
2512 }
2513
2514
2515 /**
2516 * nes_cm_disconn
2517 */
2518 int nes_cm_disconn(struct nes_qp *nesqp)
2519 {
2520 struct disconn_work *work;
2521
2522 work = kzalloc(sizeof *work, GFP_ATOMIC);
2523 if (!work)
2524 return -ENOMEM; /* Timer will clean up */
2525
2526 nes_add_ref(&nesqp->ibqp);
2527 work->nesqp = nesqp;
2528 INIT_WORK(&work->work, nes_disconnect_worker);
2529 queue_work(g_cm_core->disconn_wq, &work->work);
2530 return 0;
2531 }
2532
2533
2534 /**
2535 * nes_disconnect_worker
2536 */
2537 static void nes_disconnect_worker(struct work_struct *work)
2538 {
2539 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2540 struct nes_qp *nesqp = dwork->nesqp;
2541
2542 kfree(dwork);
2543 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2544 nesqp->last_aeq, nesqp->hwqp.qp_id);
2545 nes_cm_disconn_true(nesqp);
2546 nes_rem_ref(&nesqp->ibqp);
2547 }
2548
2549
2550 /**
2551 * nes_cm_disconn_true
2552 */
2553 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2554 {
2555 unsigned long flags;
2556 int ret = 0;
2557 struct iw_cm_id *cm_id;
2558 struct iw_cm_event cm_event;
2559 struct nes_vnic *nesvnic;
2560 u16 last_ae;
2561 u8 original_hw_tcp_state;
2562 u8 original_ibqp_state;
2563 enum iw_cm_event_status disconn_status = IW_CM_EVENT_STATUS_OK;
2564 int issue_disconn = 0;
2565 int issue_close = 0;
2566 int issue_flush = 0;
2567 u32 flush_q = NES_CQP_FLUSH_RQ;
2568 struct ib_event ibevent;
2569
2570 if (!nesqp) {
2571 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2572 return -1;
2573 }
2574
2575 spin_lock_irqsave(&nesqp->lock, flags);
2576 cm_id = nesqp->cm_id;
2577 /* make sure we havent already closed this connection */
2578 if (!cm_id) {
2579 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2580 nesqp->hwqp.qp_id);
2581 spin_unlock_irqrestore(&nesqp->lock, flags);
2582 return -1;
2583 }
2584
2585 nesvnic = to_nesvnic(nesqp->ibqp.device);
2586 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2587
2588 original_hw_tcp_state = nesqp->hw_tcp_state;
2589 original_ibqp_state = nesqp->ibqp_state;
2590 last_ae = nesqp->last_aeq;
2591
2592 if (nesqp->term_flags) {
2593 issue_disconn = 1;
2594 issue_close = 1;
2595 nesqp->cm_id = NULL;
2596 if (nesqp->flush_issued == 0) {
2597 nesqp->flush_issued = 1;
2598 issue_flush = 1;
2599 }
2600 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2601 ((original_ibqp_state == IB_QPS_RTS) &&
2602 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2603 issue_disconn = 1;
2604 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2605 disconn_status = IW_CM_EVENT_STATUS_RESET;
2606 }
2607
2608 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2609 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2610 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2611 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2612 issue_close = 1;
2613 nesqp->cm_id = NULL;
2614 if (nesqp->flush_issued == 0) {
2615 nesqp->flush_issued = 1;
2616 issue_flush = 1;
2617 }
2618 }
2619
2620 spin_unlock_irqrestore(&nesqp->lock, flags);
2621
2622 if ((issue_flush) && (nesqp->destroyed == 0)) {
2623 /* Flush the queue(s) */
2624 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2625 flush_q |= NES_CQP_FLUSH_SQ;
2626 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2627
2628 if (nesqp->term_flags) {
2629 ibevent.device = nesqp->ibqp.device;
2630 ibevent.event = nesqp->terminate_eventtype;
2631 ibevent.element.qp = &nesqp->ibqp;
2632 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2633 }
2634 }
2635
2636 if ((cm_id) && (cm_id->event_handler)) {
2637 if (issue_disconn) {
2638 atomic_inc(&cm_disconnects);
2639 cm_event.event = IW_CM_EVENT_DISCONNECT;
2640 cm_event.status = disconn_status;
2641 cm_event.local_addr = cm_id->local_addr;
2642 cm_event.remote_addr = cm_id->remote_addr;
2643 cm_event.private_data = NULL;
2644 cm_event.private_data_len = 0;
2645
2646 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2647 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2648 "cm_id = %p, refcount = %u.\n",
2649 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2650 nesqp->hwqp.sq_tail, cm_id,
2651 atomic_read(&nesqp->refcount));
2652
2653 ret = cm_id->event_handler(cm_id, &cm_event);
2654 if (ret)
2655 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2656 "returned, ret=%d\n", ret);
2657 }
2658
2659 if (issue_close) {
2660 atomic_inc(&cm_closes);
2661 nes_disconnect(nesqp, 1);
2662
2663 cm_id->provider_data = nesqp;
2664 /* Send up the close complete event */
2665 cm_event.event = IW_CM_EVENT_CLOSE;
2666 cm_event.status = IW_CM_EVENT_STATUS_OK;
2667 cm_event.provider_data = cm_id->provider_data;
2668 cm_event.local_addr = cm_id->local_addr;
2669 cm_event.remote_addr = cm_id->remote_addr;
2670 cm_event.private_data = NULL;
2671 cm_event.private_data_len = 0;
2672
2673 ret = cm_id->event_handler(cm_id, &cm_event);
2674 if (ret) {
2675 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2676 }
2677
2678 cm_id->rem_ref(cm_id);
2679 }
2680 }
2681
2682 return 0;
2683 }
2684
2685
2686 /**
2687 * nes_disconnect
2688 */
2689 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2690 {
2691 int ret = 0;
2692 struct nes_vnic *nesvnic;
2693 struct nes_device *nesdev;
2694 struct nes_ib_device *nesibdev;
2695
2696 nesvnic = to_nesvnic(nesqp->ibqp.device);
2697 if (!nesvnic)
2698 return -EINVAL;
2699
2700 nesdev = nesvnic->nesdev;
2701 nesibdev = nesvnic->nesibdev;
2702
2703 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2704 atomic_read(&nesvnic->netdev->refcnt));
2705
2706 if (nesqp->active_conn) {
2707
2708 /* indicate this connection is NOT active */
2709 nesqp->active_conn = 0;
2710 } else {
2711 /* Need to free the Last Streaming Mode Message */
2712 if (nesqp->ietf_frame) {
2713 if (nesqp->lsmm_mr)
2714 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2715 pci_free_consistent(nesdev->pcidev,
2716 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2717 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2718 }
2719 }
2720
2721 /* close the CM node down if it is still active */
2722 if (nesqp->cm_node) {
2723 nes_debug(NES_DBG_CM, "Call close API\n");
2724
2725 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2726 }
2727
2728 return ret;
2729 }
2730
2731
2732 /**
2733 * nes_accept
2734 */
2735 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2736 {
2737 u64 u64temp;
2738 struct ib_qp *ibqp;
2739 struct nes_qp *nesqp;
2740 struct nes_vnic *nesvnic;
2741 struct nes_device *nesdev;
2742 struct nes_cm_node *cm_node;
2743 struct nes_adapter *adapter;
2744 struct ib_qp_attr attr;
2745 struct iw_cm_event cm_event;
2746 struct nes_hw_qp_wqe *wqe;
2747 struct nes_v4_quad nes_quad;
2748 u32 crc_value;
2749 int ret;
2750 int passive_state;
2751 struct nes_ib_device *nesibdev;
2752 struct ib_mr *ibmr = NULL;
2753 struct ib_phys_buf ibphysbuf;
2754 struct nes_pd *nespd;
2755 u64 tagged_offset;
2756
2757 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2758 if (!ibqp)
2759 return -EINVAL;
2760
2761 /* get all our handles */
2762 nesqp = to_nesqp(ibqp);
2763 nesvnic = to_nesvnic(nesqp->ibqp.device);
2764 nesdev = nesvnic->nesdev;
2765 adapter = nesdev->nesadapter;
2766
2767 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2768 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2769 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2770 nesvnic->netdev->name);
2771
2772 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
2773 if (cm_node->loopbackpartner)
2774 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
2775 rem_ref_cm_node(cm_node->cm_core, cm_node);
2776 return -EINVAL;
2777 }
2778
2779 passive_state = atomic_add_return(1, &cm_node->passive_state);
2780 if (passive_state == NES_SEND_RESET_EVENT) {
2781 rem_ref_cm_node(cm_node->cm_core, cm_node);
2782 return -ECONNRESET;
2783 }
2784
2785 /* associate the node with the QP */
2786 nesqp->cm_node = (void *)cm_node;
2787 cm_node->nesqp = nesqp;
2788
2789 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2790 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2791 atomic_inc(&cm_accepts);
2792
2793 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2794 atomic_read(&nesvnic->netdev->refcnt));
2795
2796 /* allocate the ietf frame and space for private data */
2797 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2798 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2799 &nesqp->ietf_frame_pbase);
2800
2801 if (!nesqp->ietf_frame) {
2802 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2803 "data\n");
2804 return -ENOMEM;
2805 }
2806
2807
2808 /* setup the MPA frame */
2809 nesqp->private_data_len = conn_param->private_data_len;
2810 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2811
2812 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2813 conn_param->private_data_len);
2814
2815 nesqp->ietf_frame->priv_data_len =
2816 cpu_to_be16(conn_param->private_data_len);
2817 nesqp->ietf_frame->rev = mpa_version;
2818 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2819
2820 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2821 wqe = &nesqp->hwqp.sq_vbase[0];
2822
2823 if (cm_id->remote_addr.sin_addr.s_addr !=
2824 cm_id->local_addr.sin_addr.s_addr) {
2825 u64temp = (unsigned long)nesqp;
2826 nesibdev = nesvnic->nesibdev;
2827 nespd = nesqp->nespd;
2828 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2829 ibphysbuf.size = conn_param->private_data_len +
2830 sizeof(struct ietf_mpa_frame);
2831 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
2832 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2833 &ibphysbuf, 1,
2834 IB_ACCESS_LOCAL_WRITE,
2835 &tagged_offset);
2836 if (!ibmr) {
2837 nes_debug(NES_DBG_CM, "Unable to register memory region"
2838 "for lSMM for cm_node = %p \n",
2839 cm_node);
2840 pci_free_consistent(nesdev->pcidev,
2841 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2842 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2843 return -ENOMEM;
2844 }
2845
2846 ibmr->pd = &nespd->ibpd;
2847 ibmr->device = nespd->ibpd.device;
2848 nesqp->lsmm_mr = ibmr;
2849
2850 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2851 set_wqe_64bit_value(wqe->wqe_words,
2852 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2853 u64temp);
2854 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2855 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2856 NES_IWARP_SQ_WQE_WRPDU);
2857 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2858 cpu_to_le32(conn_param->private_data_len +
2859 sizeof(struct ietf_mpa_frame));
2860 set_wqe_64bit_value(wqe->wqe_words,
2861 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
2862 (u64)(unsigned long)nesqp->ietf_frame);
2863 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2864 cpu_to_le32(conn_param->private_data_len +
2865 sizeof(struct ietf_mpa_frame));
2866 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
2867 if (nesqp->sq_kmapped) {
2868 nesqp->sq_kmapped = 0;
2869 kunmap(nesqp->page);
2870 }
2871
2872 nesqp->nesqp_context->ird_ord_sizes |=
2873 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2874 NES_QPCONTEXT_ORDIRD_WRPDU);
2875 } else {
2876 nesqp->nesqp_context->ird_ord_sizes |=
2877 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
2878 }
2879 nesqp->skip_lsmm = 1;
2880
2881
2882 /* Cache the cm_id in the qp */
2883 nesqp->cm_id = cm_id;
2884 cm_node->cm_id = cm_id;
2885
2886 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2887 cm_id->provider_data = nesqp;
2888 nesqp->active_conn = 0;
2889
2890 if (cm_node->state == NES_CM_STATE_TSA)
2891 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2892 cm_node);
2893
2894 nes_cm_init_tsa_conn(nesqp, cm_node);
2895
2896 nesqp->nesqp_context->tcpPorts[0] =
2897 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2898 nesqp->nesqp_context->tcpPorts[1] =
2899 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2900
2901 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2902 nesqp->nesqp_context->ip0 =
2903 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2904 else
2905 nesqp->nesqp_context->ip0 =
2906 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2907
2908 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2909 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2910 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2911
2912 nesqp->nesqp_context->arp_index_vlan |=
2913 cpu_to_le32(nes_arp_table(nesdev,
2914 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2915 NES_ARP_RESOLVE) << 16);
2916
2917 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2918 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2919
2920 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2921
2922 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2923 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2924 nesqp->nesqp_context->ird_ord_sizes |=
2925 cpu_to_le32((u32)conn_param->ord);
2926
2927 memset(&nes_quad, 0, sizeof(nes_quad));
2928 nes_quad.DstIpAdrIndex =
2929 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2930 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2931 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2932 else
2933 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2934 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2935 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2936
2937 /* Produce hash key */
2938 crc_value = get_crc_value(&nes_quad);
2939 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2940 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2941 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2942
2943 nesqp->hte_index &= adapter->hte_index_mask;
2944 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2945
2946 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2947
2948 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2949 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2950 "private data length=%zu.\n", nesqp->hwqp.qp_id,
2951 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2952 ntohs(cm_id->remote_addr.sin_port),
2953 ntohl(cm_id->local_addr.sin_addr.s_addr),
2954 ntohs(cm_id->local_addr.sin_port),
2955 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2956 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2957 conn_param->private_data_len +
2958 sizeof(struct ietf_mpa_frame));
2959
2960
2961 /* notify OF layer that accept event was successful */
2962 cm_id->add_ref(cm_id);
2963 nes_add_ref(&nesqp->ibqp);
2964
2965 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2966 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2967 cm_event.provider_data = (void *)nesqp;
2968 cm_event.local_addr = cm_id->local_addr;
2969 cm_event.remote_addr = cm_id->remote_addr;
2970 cm_event.private_data = NULL;
2971 cm_event.private_data_len = 0;
2972 ret = cm_id->event_handler(cm_id, &cm_event);
2973 attr.qp_state = IB_QPS_RTS;
2974 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2975 if (cm_node->loopbackpartner) {
2976 cm_node->loopbackpartner->mpa_frame_size =
2977 nesqp->private_data_len;
2978 /* copy entire MPA frame to our cm_node's frame */
2979 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2980 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2981 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2982 }
2983 if (ret)
2984 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2985 "ret=%d\n", __func__, __LINE__, ret);
2986
2987 return 0;
2988 }
2989
2990
2991 /**
2992 * nes_reject
2993 */
2994 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2995 {
2996 struct nes_cm_node *cm_node;
2997 struct nes_cm_node *loopback;
2998
2999 struct nes_cm_core *cm_core;
3000
3001 atomic_inc(&cm_rejects);
3002 cm_node = (struct nes_cm_node *) cm_id->provider_data;
3003 loopback = cm_node->loopbackpartner;
3004 cm_core = cm_node->cm_core;
3005 cm_node->cm_id = cm_id;
3006 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
3007
3008 if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
3009 return -EINVAL;
3010
3011 memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
3012 if (loopback) {
3013 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3014 loopback->mpa_frame.priv_data_len = pdata_len;
3015 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
3016 pdata_len;
3017 } else {
3018 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
3019 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
3020 }
3021
3022 cm_node->mpa_frame.rev = mpa_version;
3023 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
3024
3025 return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
3026 }
3027
3028
3029 /**
3030 * nes_connect
3031 * setup and launch cm connect node
3032 */
3033 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3034 {
3035 struct ib_qp *ibqp;
3036 struct nes_qp *nesqp;
3037 struct nes_vnic *nesvnic;
3038 struct nes_device *nesdev;
3039 struct nes_cm_node *cm_node;
3040 struct nes_cm_info cm_info;
3041 int apbvt_set = 0;
3042
3043 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3044 if (!ibqp)
3045 return -EINVAL;
3046 nesqp = to_nesqp(ibqp);
3047 if (!nesqp)
3048 return -EINVAL;
3049 nesvnic = to_nesvnic(nesqp->ibqp.device);
3050 if (!nesvnic)
3051 return -EINVAL;
3052 nesdev = nesvnic->nesdev;
3053 if (!nesdev)
3054 return -EINVAL;
3055
3056 if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3057 return -EINVAL;
3058
3059 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3060 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3061 ntohl(nesvnic->local_ipaddr),
3062 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3063 ntohs(cm_id->remote_addr.sin_port),
3064 ntohl(cm_id->local_addr.sin_addr.s_addr),
3065 ntohs(cm_id->local_addr.sin_port));
3066
3067 atomic_inc(&cm_connects);
3068 nesqp->active_conn = 1;
3069
3070 /* cache the cm_id in the qp */
3071 nesqp->cm_id = cm_id;
3072
3073 cm_id->provider_data = nesqp;
3074
3075 nesqp->private_data_len = conn_param->private_data_len;
3076 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3077 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3078 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3079 conn_param->private_data_len);
3080
3081 if (cm_id->local_addr.sin_addr.s_addr !=
3082 cm_id->remote_addr.sin_addr.s_addr) {
3083 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3084 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3085 apbvt_set = 1;
3086 }
3087
3088 /* set up the connection params for the node */
3089 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3090 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3091 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3092 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3093 cm_info.cm_id = cm_id;
3094 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3095
3096 cm_id->add_ref(cm_id);
3097
3098 /* create a connect CM node connection */
3099 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3100 conn_param->private_data_len, (void *)conn_param->private_data,
3101 &cm_info);
3102 if (!cm_node) {
3103 if (apbvt_set)
3104 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3105 PCI_FUNC(nesdev->pcidev->devfn),
3106 NES_MANAGE_APBVT_DEL);
3107
3108 cm_id->rem_ref(cm_id);
3109 return -ENOMEM;
3110 }
3111
3112 cm_node->apbvt_set = apbvt_set;
3113 nesqp->cm_node = cm_node;
3114 cm_node->nesqp = nesqp;
3115 nes_add_ref(&nesqp->ibqp);
3116
3117 return 0;
3118 }
3119
3120
3121 /**
3122 * nes_create_listen
3123 */
3124 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3125 {
3126 struct nes_vnic *nesvnic;
3127 struct nes_cm_listener *cm_node;
3128 struct nes_cm_info cm_info;
3129 int err;
3130
3131 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3132 cm_id, ntohs(cm_id->local_addr.sin_port));
3133
3134 nesvnic = to_nesvnic(cm_id->device);
3135 if (!nesvnic)
3136 return -EINVAL;
3137
3138 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3139 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3140
3141 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3142 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3143
3144 /* setup listen params in our api call struct */
3145 cm_info.loc_addr = nesvnic->local_ipaddr;
3146 cm_info.loc_port = cm_id->local_addr.sin_port;
3147 cm_info.backlog = backlog;
3148 cm_info.cm_id = cm_id;
3149
3150 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3151
3152
3153 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3154 if (!cm_node) {
3155 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3156 __func__, __LINE__);
3157 return -ENOMEM;
3158 }
3159
3160 cm_id->provider_data = cm_node;
3161
3162 if (!cm_node->reused_node) {
3163 err = nes_manage_apbvt(nesvnic,
3164 ntohs(cm_id->local_addr.sin_port),
3165 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3166 NES_MANAGE_APBVT_ADD);
3167 if (err) {
3168 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3169 err);
3170 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3171 return err;
3172 }
3173 atomic_inc(&cm_listens_created);
3174 }
3175
3176 cm_id->add_ref(cm_id);
3177 cm_id->provider_data = (void *)cm_node;
3178
3179
3180 return 0;
3181 }
3182
3183
3184 /**
3185 * nes_destroy_listen
3186 */
3187 int nes_destroy_listen(struct iw_cm_id *cm_id)
3188 {
3189 if (cm_id->provider_data)
3190 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3191 else
3192 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3193
3194 cm_id->rem_ref(cm_id);
3195
3196 return 0;
3197 }
3198
3199
3200 /**
3201 * nes_cm_recv
3202 */
3203 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3204 {
3205 int rc = 0;
3206 cm_packets_received++;
3207 if ((g_cm_core) && (g_cm_core->api)) {
3208 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3209 } else {
3210 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3211 " cm is not setup properly.\n");
3212 }
3213
3214 return rc;
3215 }
3216
3217
3218 /**
3219 * nes_cm_start
3220 * Start and init a cm core module
3221 */
3222 int nes_cm_start(void)
3223 {
3224 nes_debug(NES_DBG_CM, "\n");
3225 /* create the primary CM core, pass this handle to subsequent core inits */
3226 g_cm_core = nes_cm_alloc_core();
3227 if (g_cm_core) {
3228 return 0;
3229 } else {
3230 return -ENOMEM;
3231 }
3232 }
3233
3234
3235 /**
3236 * nes_cm_stop
3237 * stop and dealloc all cm core instances
3238 */
3239 int nes_cm_stop(void)
3240 {
3241 g_cm_core->api->destroy_cm_core(g_cm_core);
3242 return 0;
3243 }
3244
3245
3246 /**
3247 * cm_event_connected
3248 * handle a connected event, setup QPs and HW
3249 */
3250 static void cm_event_connected(struct nes_cm_event *event)
3251 {
3252 u64 u64temp;
3253 struct nes_qp *nesqp;
3254 struct nes_vnic *nesvnic;
3255 struct nes_device *nesdev;
3256 struct nes_cm_node *cm_node;
3257 struct nes_adapter *nesadapter;
3258 struct ib_qp_attr attr;
3259 struct iw_cm_id *cm_id;
3260 struct iw_cm_event cm_event;
3261 struct nes_hw_qp_wqe *wqe;
3262 struct nes_v4_quad nes_quad;
3263 u32 crc_value;
3264 int ret;
3265
3266 /* get all our handles */
3267 cm_node = event->cm_node;
3268 cm_id = cm_node->cm_id;
3269 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3270 nesqp = (struct nes_qp *)cm_id->provider_data;
3271 nesvnic = to_nesvnic(nesqp->ibqp.device);
3272 nesdev = nesvnic->nesdev;
3273 nesadapter = nesdev->nesadapter;
3274
3275 if (nesqp->destroyed) {
3276 return;
3277 }
3278 atomic_inc(&cm_connecteds);
3279 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3280 " local port 0x%04X. jiffies = %lu.\n",
3281 nesqp->hwqp.qp_id,
3282 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3283 ntohs(cm_id->remote_addr.sin_port),
3284 ntohs(cm_id->local_addr.sin_port),
3285 jiffies);
3286
3287 nes_cm_init_tsa_conn(nesqp, cm_node);
3288
3289 /* set the QP tsa context */
3290 nesqp->nesqp_context->tcpPorts[0] =
3291 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3292 nesqp->nesqp_context->tcpPorts[1] =
3293 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3294 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3295 nesqp->nesqp_context->ip0 =
3296 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3297 else
3298 nesqp->nesqp_context->ip0 =
3299 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3300
3301 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3302 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3303 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3304 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3305 nes_arp_table(nesdev,
3306 le32_to_cpu(nesqp->nesqp_context->ip0),
3307 NULL, NES_ARP_RESOLVE) << 16);
3308 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3309 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3310 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3311 nesqp->nesqp_context->ird_ord_sizes |=
3312 cpu_to_le32((u32)1 <<
3313 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3314
3315 /* Adjust tail for not having a LSMM */
3316 nesqp->hwqp.sq_tail = 1;
3317
3318 #if defined(NES_SEND_FIRST_WRITE)
3319 if (cm_node->send_write0) {
3320 nes_debug(NES_DBG_CM, "Sending first write.\n");
3321 wqe = &nesqp->hwqp.sq_vbase[0];
3322 u64temp = (unsigned long)nesqp;
3323 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3324 set_wqe_64bit_value(wqe->wqe_words,
3325 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3326 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3327 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3328 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3329 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3330 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3331 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3332 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3333
3334 if (nesqp->sq_kmapped) {
3335 nesqp->sq_kmapped = 0;
3336 kunmap(nesqp->page);
3337 }
3338
3339 /* use the reserved spot on the WQ for the extra first WQE */
3340 nesqp->nesqp_context->ird_ord_sizes &=
3341 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3342 NES_QPCONTEXT_ORDIRD_WRPDU |
3343 NES_QPCONTEXT_ORDIRD_ALSMM));
3344 nesqp->skip_lsmm = 1;
3345 nesqp->hwqp.sq_tail = 0;
3346 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3347 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3348 }
3349 #endif
3350
3351 memset(&nes_quad, 0, sizeof(nes_quad));
3352
3353 nes_quad.DstIpAdrIndex =
3354 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3355 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3356 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3357 else
3358 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3359 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3360 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3361
3362 /* Produce hash key */
3363 crc_value = get_crc_value(&nes_quad);
3364 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3365 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3366 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3367
3368 nesqp->hte_index &= nesadapter->hte_index_mask;
3369 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3370
3371 nesqp->ietf_frame = &cm_node->mpa_frame;
3372 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3373 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3374
3375 /* notify OF layer we successfully created the requested connection */
3376 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3377 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3378 cm_event.provider_data = cm_id->provider_data;
3379 cm_event.local_addr.sin_family = AF_INET;
3380 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3381 cm_event.remote_addr = cm_id->remote_addr;
3382
3383 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3384 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3385
3386 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3387 ret = cm_id->event_handler(cm_id, &cm_event);
3388 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3389
3390 if (ret)
3391 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3392 "ret=%d\n", __func__, __LINE__, ret);
3393 attr.qp_state = IB_QPS_RTS;
3394 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3395
3396 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3397 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3398
3399 return;
3400 }
3401
3402
3403 /**
3404 * cm_event_connect_error
3405 */
3406 static void cm_event_connect_error(struct nes_cm_event *event)
3407 {
3408 struct nes_qp *nesqp;
3409 struct iw_cm_id *cm_id;
3410 struct iw_cm_event cm_event;
3411 /* struct nes_cm_info cm_info; */
3412 int ret;
3413
3414 if (!event->cm_node)
3415 return;
3416
3417 cm_id = event->cm_node->cm_id;
3418 if (!cm_id) {
3419 return;
3420 }
3421
3422 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3423 nesqp = cm_id->provider_data;
3424
3425 if (!nesqp) {
3426 return;
3427 }
3428
3429 /* notify OF layer about this connection error event */
3430 /* cm_id->rem_ref(cm_id); */
3431 nesqp->cm_id = NULL;
3432 cm_id->provider_data = NULL;
3433 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3434 cm_event.status = -ECONNRESET;
3435 cm_event.provider_data = cm_id->provider_data;
3436 cm_event.local_addr = cm_id->local_addr;
3437 cm_event.remote_addr = cm_id->remote_addr;
3438 cm_event.private_data = NULL;
3439 cm_event.private_data_len = 0;
3440
3441 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3442 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3443 cm_event.remote_addr.sin_addr.s_addr);
3444
3445 ret = cm_id->event_handler(cm_id, &cm_event);
3446 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3447 if (ret)
3448 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3449 "ret=%d\n", __func__, __LINE__, ret);
3450 cm_id->rem_ref(cm_id);
3451
3452 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3453 return;
3454 }
3455
3456
3457 /**
3458 * cm_event_reset
3459 */
3460 static void cm_event_reset(struct nes_cm_event *event)
3461 {
3462 struct nes_qp *nesqp;
3463 struct iw_cm_id *cm_id;
3464 struct iw_cm_event cm_event;
3465 /* struct nes_cm_info cm_info; */
3466 int ret;
3467
3468 if (!event->cm_node)
3469 return;
3470
3471 if (!event->cm_node->cm_id)
3472 return;
3473
3474 cm_id = event->cm_node->cm_id;
3475
3476 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3477 nesqp = cm_id->provider_data;
3478 if (!nesqp)
3479 return;
3480
3481 nesqp->cm_id = NULL;
3482 /* cm_id->provider_data = NULL; */
3483 cm_event.event = IW_CM_EVENT_DISCONNECT;
3484 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3485 cm_event.provider_data = cm_id->provider_data;
3486 cm_event.local_addr = cm_id->local_addr;
3487 cm_event.remote_addr = cm_id->remote_addr;
3488 cm_event.private_data = NULL;
3489 cm_event.private_data_len = 0;
3490
3491 cm_id->add_ref(cm_id);
3492 ret = cm_id->event_handler(cm_id, &cm_event);
3493 atomic_inc(&cm_closes);
3494 cm_event.event = IW_CM_EVENT_CLOSE;
3495 cm_event.status = IW_CM_EVENT_STATUS_OK;
3496 cm_event.provider_data = cm_id->provider_data;
3497 cm_event.local_addr = cm_id->local_addr;
3498 cm_event.remote_addr = cm_id->remote_addr;
3499 cm_event.private_data = NULL;
3500 cm_event.private_data_len = 0;
3501 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3502 ret = cm_id->event_handler(cm_id, &cm_event);
3503
3504 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3505
3506
3507 /* notify OF layer about this connection error event */
3508 cm_id->rem_ref(cm_id);
3509
3510 return;
3511 }
3512
3513
3514 /**
3515 * cm_event_mpa_req
3516 */
3517 static void cm_event_mpa_req(struct nes_cm_event *event)
3518 {
3519 struct iw_cm_id *cm_id;
3520 struct iw_cm_event cm_event;
3521 int ret;
3522 struct nes_cm_node *cm_node;
3523
3524 cm_node = event->cm_node;
3525 if (!cm_node)
3526 return;
3527 cm_id = cm_node->cm_id;
3528
3529 atomic_inc(&cm_connect_reqs);
3530 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3531 cm_node, cm_id, jiffies);
3532
3533 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3534 cm_event.status = IW_CM_EVENT_STATUS_OK;
3535 cm_event.provider_data = (void *)cm_node;
3536
3537 cm_event.local_addr.sin_family = AF_INET;
3538 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3539 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3540
3541 cm_event.remote_addr.sin_family = AF_INET;
3542 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3543 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3544 cm_event.private_data = cm_node->mpa_frame_buf;
3545 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3546
3547 ret = cm_id->event_handler(cm_id, &cm_event);
3548 if (ret)
3549 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3550 __func__, __LINE__, ret);
3551 return;
3552 }
3553
3554
3555 static void cm_event_mpa_reject(struct nes_cm_event *event)
3556 {
3557 struct iw_cm_id *cm_id;
3558 struct iw_cm_event cm_event;
3559 struct nes_cm_node *cm_node;
3560 int ret;
3561
3562 cm_node = event->cm_node;
3563 if (!cm_node)
3564 return;
3565 cm_id = cm_node->cm_id;
3566
3567 atomic_inc(&cm_connect_reqs);
3568 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3569 cm_node, cm_id, jiffies);
3570
3571 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3572 cm_event.status = -ECONNREFUSED;
3573 cm_event.provider_data = cm_id->provider_data;
3574
3575 cm_event.local_addr.sin_family = AF_INET;
3576 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3577 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3578
3579 cm_event.remote_addr.sin_family = AF_INET;
3580 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3581 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3582
3583 cm_event.private_data = cm_node->mpa_frame_buf;
3584 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3585
3586 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3587 "remove_addr=%08x\n",
3588 cm_event.local_addr.sin_addr.s_addr,
3589 cm_event.remote_addr.sin_addr.s_addr);
3590
3591 ret = cm_id->event_handler(cm_id, &cm_event);
3592 if (ret)
3593 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3594 __func__, __LINE__, ret);
3595
3596 return;
3597 }
3598
3599
3600 static void nes_cm_event_handler(struct work_struct *);
3601
3602 /**
3603 * nes_cm_post_event
3604 * post an event to the cm event handler
3605 */
3606 static int nes_cm_post_event(struct nes_cm_event *event)
3607 {
3608 atomic_inc(&event->cm_node->cm_core->events_posted);
3609 add_ref_cm_node(event->cm_node);
3610 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3611 INIT_WORK(&event->event_work, nes_cm_event_handler);
3612 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3613 event->cm_node, event);
3614
3615 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3616
3617 nes_debug(NES_DBG_CM, "Exit\n");
3618 return 0;
3619 }
3620
3621
3622 /**
3623 * nes_cm_event_handler
3624 * worker function to handle cm events
3625 * will free instance of nes_cm_event
3626 */
3627 static void nes_cm_event_handler(struct work_struct *work)
3628 {
3629 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3630 event_work);
3631 struct nes_cm_core *cm_core;
3632
3633 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3634 return;
3635
3636 cm_core = event->cm_node->cm_core;
3637 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3638 event, event->type, atomic_read(&cm_core->events_posted));
3639
3640 switch (event->type) {
3641 case NES_CM_EVENT_MPA_REQ:
3642 cm_event_mpa_req(event);
3643 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3644 event->cm_node);
3645 break;
3646 case NES_CM_EVENT_RESET:
3647 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3648 event->cm_node);
3649 cm_event_reset(event);
3650 break;
3651 case NES_CM_EVENT_CONNECTED:
3652 if ((!event->cm_node->cm_id) ||
3653 (event->cm_node->state != NES_CM_STATE_TSA))
3654 break;
3655 cm_event_connected(event);
3656 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3657 break;
3658 case NES_CM_EVENT_MPA_REJECT:
3659 if ((!event->cm_node->cm_id) ||
3660 (event->cm_node->state == NES_CM_STATE_TSA))
3661 break;
3662 cm_event_mpa_reject(event);
3663 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3664 break;
3665
3666 case NES_CM_EVENT_ABORTED:
3667 if ((!event->cm_node->cm_id) ||
3668 (event->cm_node->state == NES_CM_STATE_TSA))
3669 break;
3670 cm_event_connect_error(event);
3671 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3672 break;
3673 case NES_CM_EVENT_DROPPED_PKT:
3674 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3675 break;
3676 default:
3677 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3678 break;
3679 }
3680
3681 atomic_dec(&cm_core->events_posted);
3682 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3683 rem_ref_cm_node(cm_core, event->cm_node);
3684 kfree(event);
3685
3686 return;
3687 }
Tomato firmware and modifications.