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RDMA/nes: Fix CRC endianness for RDMA connection establishment on big-endian
[linux-2.6/btrfs-unstable.git] / drivers / infiniband / hw / nes / nes_cm.c
blob39adb267fb1553fb45d96104b361eb6442ba8658
1 /*
2 * Copyright (c) 2006 - 2008 NetEffect, Inc. 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/notifier.h>
44 #include <linux/net.h>
45 #include <linux/types.h>
46 #include <linux/timer.h>
47 #include <linux/time.h>
48 #include <linux/delay.h>
49 #include <linux/etherdevice.h>
50 #include <linux/netdevice.h>
51 #include <linux/random.h>
52 #include <linux/list.h>
53 #include <linux/threads.h>
54
55 #include <net/neighbour.h>
56 #include <net/route.h>
57 #include <net/ip_fib.h>
58
59 #include "nes.h"
60
61 u32 cm_packets_sent;
62 u32 cm_packets_bounced;
63 u32 cm_packets_dropped;
64 u32 cm_packets_retrans;
65 u32 cm_packets_created;
66 u32 cm_packets_received;
67 u32 cm_listens_created;
68 u32 cm_listens_destroyed;
69 u32 cm_backlog_drops;
70 atomic_t cm_loopbacks;
71 atomic_t cm_nodes_created;
72 atomic_t cm_nodes_destroyed;
73 atomic_t cm_accel_dropped_pkts;
74 atomic_t cm_resets_recvd;
75
76 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
77 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
78 struct nes_vnic *, struct nes_cm_info *);
79 static int add_ref_cm_node(struct nes_cm_node *);
80 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
81 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
82
83
84 /* External CM API Interface */
85 /* instance of function pointers for client API */
86 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
87 static struct nes_cm_ops nes_cm_api = {
88 mini_cm_accelerated,
89 mini_cm_listen,
90 mini_cm_del_listen,
91 mini_cm_connect,
92 mini_cm_close,
93 mini_cm_accept,
94 mini_cm_reject,
95 mini_cm_recv_pkt,
96 mini_cm_dealloc_core,
97 mini_cm_get,
98 mini_cm_set
99 };
100
101 struct nes_cm_core *g_cm_core;
102
103 atomic_t cm_connects;
104 atomic_t cm_accepts;
105 atomic_t cm_disconnects;
106 atomic_t cm_closes;
107 atomic_t cm_connecteds;
108 atomic_t cm_connect_reqs;
109 atomic_t cm_rejects;
110
111
112 /**
113 * create_event
114 */
115 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
116 enum nes_cm_event_type type)
117 {
118 struct nes_cm_event *event;
119
120 if (!cm_node->cm_id)
121 return NULL;
122
123 /* allocate an empty event */
124 event = kzalloc(sizeof(*event), GFP_ATOMIC);
125
126 if (!event)
127 return NULL;
128
129 event->type = type;
130 event->cm_node = cm_node;
131 event->cm_info.rem_addr = cm_node->rem_addr;
132 event->cm_info.loc_addr = cm_node->loc_addr;
133 event->cm_info.rem_port = cm_node->rem_port;
134 event->cm_info.loc_port = cm_node->loc_port;
135 event->cm_info.cm_id = cm_node->cm_id;
136
137 nes_debug(NES_DBG_CM, "Created event=%p, type=%u, dst_addr=%08x[%x],"
138 " src_addr=%08x[%x]\n",
139 event, type,
140 event->cm_info.loc_addr, event->cm_info.loc_port,
141 event->cm_info.rem_addr, event->cm_info.rem_port);
142
143 nes_cm_post_event(event);
144 return event;
145 }
146
147
148 /**
149 * send_mpa_request
150 */
151 int send_mpa_request(struct nes_cm_node *cm_node)
152 {
153 struct sk_buff *skb;
154 int ret;
155
156 skb = get_free_pkt(cm_node);
157 if (!skb) {
158 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
159 return -1;
160 }
161
162 /* send an MPA Request frame */
163 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
164 cm_node->mpa_frame_size, SET_ACK);
165
166 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
167 if (ret < 0) {
168 return ret;
169 }
170
171 return 0;
172 }
173
174
175 /**
176 * recv_mpa - process a received TCP pkt, we are expecting an
177 * IETF MPA frame
178 */
179 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len)
180 {
181 struct ietf_mpa_frame *mpa_frame;
182
183 /* assume req frame is in tcp data payload */
184 if (len < sizeof(struct ietf_mpa_frame)) {
185 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
186 return -1;
187 }
188
189 mpa_frame = (struct ietf_mpa_frame *)buffer;
190 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
191
192 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
193 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
194 " complete (%x + %x != %x)\n",
195 cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len);
196 return -1;
197 }
198
199 /* copy entire MPA frame to our cm_node's frame */
200 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
201 cm_node->mpa_frame_size);
202
203 return 0;
204 }
205
206
207 /**
208 * handle_exception_pkt - process an exception packet.
209 * We have been in a TSA state, and we have now received SW
210 * TCP/IP traffic should be a FIN request or IP pkt with options
211 */
212 static int handle_exception_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb)
213 {
214 int ret = 0;
215 struct tcphdr *tcph = tcp_hdr(skb);
216
217 /* first check to see if this a FIN pkt */
218 if (tcph->fin) {
219 /* we need to ACK the FIN request */
220 send_ack(cm_node);
221
222 /* check which side we are (client/server) and set next state accordingly */
223 if (cm_node->tcp_cntxt.client)
224 cm_node->state = NES_CM_STATE_CLOSING;
225 else {
226 /* we are the server side */
227 cm_node->state = NES_CM_STATE_CLOSE_WAIT;
228 /* since this is a self contained CM we don't wait for */
229 /* an APP to close us, just send final FIN immediately */
230 ret = send_fin(cm_node, NULL);
231 cm_node->state = NES_CM_STATE_LAST_ACK;
232 }
233 } else {
234 ret = -EINVAL;
235 }
236
237 return ret;
238 }
239
240
241 /**
242 * form_cm_frame - get a free packet and build empty frame Use
243 * node info to build.
244 */
245 struct sk_buff *form_cm_frame(struct sk_buff *skb, struct nes_cm_node *cm_node,
246 void *options, u32 optionsize, void *data, u32 datasize, u8 flags)
247 {
248 struct tcphdr *tcph;
249 struct iphdr *iph;
250 struct ethhdr *ethh;
251 u8 *buf;
252 u16 packetsize = sizeof(*iph);
253
254 packetsize += sizeof(*tcph);
255 packetsize += optionsize + datasize;
256
257 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
258
259 skb->len = 0;
260 buf = skb_put(skb, packetsize + ETH_HLEN);
261
262 ethh = (struct ethhdr *) buf;
263 buf += ETH_HLEN;
264
265 iph = (struct iphdr *)buf;
266 buf += sizeof(*iph);
267 tcph = (struct tcphdr *)buf;
268 skb_reset_mac_header(skb);
269 skb_set_network_header(skb, ETH_HLEN);
270 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
271 buf += sizeof(*tcph);
272
273 skb->ip_summed = CHECKSUM_PARTIAL;
274 skb->protocol = htons(0x800);
275 skb->data_len = 0;
276 skb->mac_len = ETH_HLEN;
277
278 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
279 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
280 ethh->h_proto = htons(0x0800);
281
282 iph->version = IPVERSION;
283 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
284 iph->tos = 0;
285 iph->tot_len = htons(packetsize);
286 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
287
288 iph->frag_off = htons(0x4000);
289 iph->ttl = 0x40;
290 iph->protocol = 0x06; /* IPPROTO_TCP */
291
292 iph->saddr = htonl(cm_node->loc_addr);
293 iph->daddr = htonl(cm_node->rem_addr);
294
295 tcph->source = htons(cm_node->loc_port);
296 tcph->dest = htons(cm_node->rem_port);
297 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
298
299 if (flags & SET_ACK) {
300 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
301 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
302 tcph->ack = 1;
303 } else
304 tcph->ack_seq = 0;
305
306 if (flags & SET_SYN) {
307 cm_node->tcp_cntxt.loc_seq_num++;
308 tcph->syn = 1;
309 } else
310 cm_node->tcp_cntxt.loc_seq_num += datasize; /* data (no headers) */
311
312 if (flags & SET_FIN)
313 tcph->fin = 1;
314
315 if (flags & SET_RST)
316 tcph->rst = 1;
317
318 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
319 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
320 tcph->urg_ptr = 0;
321 if (optionsize)
322 memcpy(buf, options, optionsize);
323 buf += optionsize;
324 if (datasize)
325 memcpy(buf, data, datasize);
326
327 skb_shinfo(skb)->nr_frags = 0;
328 cm_packets_created++;
329
330 return skb;
331 }
332
333
334 /**
335 * print_core - dump a cm core
336 */
337 static void print_core(struct nes_cm_core *core)
338 {
339 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
340 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
341 if (!core)
342 return;
343 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
344 nes_debug(NES_DBG_CM, "Session ID : %u \n", atomic_read(&core->session_id));
345
346 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
347
348 nes_debug(NES_DBG_CM, "Tx Free cnt : %u \n", skb_queue_len(&core->tx_free_list));
349 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
350 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
351
352 nes_debug(NES_DBG_CM, "core : %p \n", core);
353
354 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
355 }
356
357
358 /**
359 * schedule_nes_timer
360 * note - cm_node needs to be protected before calling this. Encase in:
361 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
362 */
363 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
364 enum nes_timer_type type, int send_retrans,
365 int close_when_complete)
366 {
367 unsigned long flags;
368 struct nes_cm_core *cm_core;
369 struct nes_timer_entry *new_send;
370 int ret = 0;
371 u32 was_timer_set;
372
373 if (!cm_node)
374 return -EINVAL;
375 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
376 if (!new_send)
377 return -1;
378
379 /* new_send->timetosend = currenttime */
380 new_send->retrycount = NES_DEFAULT_RETRYS;
381 new_send->retranscount = NES_DEFAULT_RETRANS;
382 new_send->skb = skb;
383 new_send->timetosend = jiffies;
384 new_send->type = type;
385 new_send->netdev = cm_node->netdev;
386 new_send->send_retrans = send_retrans;
387 new_send->close_when_complete = close_when_complete;
388
389 if (type == NES_TIMER_TYPE_CLOSE) {
390 new_send->timetosend += (HZ/2); /* TODO: decide on the correct value here */
391 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
392 list_add_tail(&new_send->list, &cm_node->recv_list);
393 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
394 }
395
396 if (type == NES_TIMER_TYPE_SEND) {
397 new_send->seq_num = htonl(tcp_hdr(skb)->seq);
398 atomic_inc(&new_send->skb->users);
399
400 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
401 if (ret != NETDEV_TX_OK) {
402 nes_debug(NES_DBG_CM, "Error sending packet %p (jiffies = %lu)\n",
403 new_send, jiffies);
404 atomic_dec(&new_send->skb->users);
405 new_send->timetosend = jiffies;
406 } else {
407 cm_packets_sent++;
408 if (!send_retrans) {
409 if (close_when_complete)
410 rem_ref_cm_node(cm_node->cm_core, cm_node);
411 dev_kfree_skb_any(new_send->skb);
412 kfree(new_send);
413 return ret;
414 }
415 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
416 }
417 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
418 list_add_tail(&new_send->list, &cm_node->retrans_list);
419 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
420 }
421 if (type == NES_TIMER_TYPE_RECV) {
422 new_send->seq_num = htonl(tcp_hdr(skb)->seq);
423 new_send->timetosend = jiffies;
424 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
425 list_add_tail(&new_send->list, &cm_node->recv_list);
426 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
427 }
428 cm_core = cm_node->cm_core;
429
430 was_timer_set = timer_pending(&cm_core->tcp_timer);
431
432 if (!was_timer_set) {
433 cm_core->tcp_timer.expires = new_send->timetosend;
434 add_timer(&cm_core->tcp_timer);
435 }
436
437 return ret;
438 }
439
440
441 /**
442 * nes_cm_timer_tick
443 */
444 void nes_cm_timer_tick(unsigned long pass)
445 {
446 unsigned long flags, qplockflags;
447 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
448 struct iw_cm_id *cm_id;
449 struct nes_cm_node *cm_node;
450 struct nes_timer_entry *send_entry, *recv_entry;
451 struct list_head *list_core, *list_core_temp;
452 struct list_head *list_node, *list_node_temp;
453 struct nes_cm_core *cm_core = g_cm_core;
454 struct nes_qp *nesqp;
455 struct sk_buff *skb;
456 u32 settimer = 0;
457 int ret = NETDEV_TX_OK;
458 int node_done;
459
460 spin_lock_irqsave(&cm_core->ht_lock, flags);
461
462 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
463 cm_node = container_of(list_node, struct nes_cm_node, list);
464 add_ref_cm_node(cm_node);
465 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
466 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
467 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
468 recv_entry = container_of(list_core, struct nes_timer_entry, list);
469 if ((time_after(recv_entry->timetosend, jiffies)) &&
470 (recv_entry->type == NES_TIMER_TYPE_CLOSE)) {
471 if (nexttimeout > recv_entry->timetosend || !settimer) {
472 nexttimeout = recv_entry->timetosend;
473 settimer = 1;
474 }
475 continue;
476 }
477 list_del(&recv_entry->list);
478 cm_id = cm_node->cm_id;
479 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
480 if (recv_entry->type == NES_TIMER_TYPE_CLOSE) {
481 nesqp = (struct nes_qp *)recv_entry->skb;
482 spin_lock_irqsave(&nesqp->lock, qplockflags);
483 if (nesqp->cm_id) {
484 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, refcount = %d: "
485 "****** HIT A NES_TIMER_TYPE_CLOSE"
486 " with something to do!!! ******\n",
487 nesqp->hwqp.qp_id, cm_id,
488 atomic_read(&nesqp->refcount));
489 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
490 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
491 nesqp->ibqp_state = IB_QPS_ERR;
492 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
493 nes_cm_disconn(nesqp);
494 } else {
495 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
496 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, refcount = %d:"
497 " ****** HIT A NES_TIMER_TYPE_CLOSE"
498 " with nothing to do!!! ******\n",
499 nesqp->hwqp.qp_id, cm_id,
500 atomic_read(&nesqp->refcount));
501 nes_rem_ref(&nesqp->ibqp);
502 }
503 if (cm_id)
504 cm_id->rem_ref(cm_id);
505 }
506 kfree(recv_entry);
507 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
508 }
509 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
510
511 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
512 node_done = 0;
513 list_for_each_safe(list_core, list_node_temp, &cm_node->retrans_list) {
514 if (node_done) {
515 break;
516 }
517 send_entry = container_of(list_core, struct nes_timer_entry, list);
518 if (time_after(send_entry->timetosend, jiffies)) {
519 if (cm_node->state != NES_CM_STATE_TSA) {
520 if ((nexttimeout > send_entry->timetosend) || !settimer) {
521 nexttimeout = send_entry->timetosend;
522 settimer = 1;
523 }
524 node_done = 1;
525 continue;
526 } else {
527 list_del(&send_entry->list);
528 skb = send_entry->skb;
529 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
530 dev_kfree_skb_any(skb);
531 kfree(send_entry);
532 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
533 continue;
534 }
535 }
536 if (send_entry->type == NES_TIMER_NODE_CLEANUP) {
537 list_del(&send_entry->list);
538 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
539 kfree(send_entry);
540 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
541 continue;
542 }
543 if ((send_entry->seq_num < cm_node->tcp_cntxt.rem_ack_num) ||
544 (cm_node->state == NES_CM_STATE_TSA) ||
545 (cm_node->state == NES_CM_STATE_CLOSED)) {
546 skb = send_entry->skb;
547 list_del(&send_entry->list);
548 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
549 kfree(send_entry);
550 dev_kfree_skb_any(skb);
551 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
552 continue;
553 }
554
555 if (!send_entry->retranscount || !send_entry->retrycount) {
556 cm_packets_dropped++;
557 skb = send_entry->skb;
558 list_del(&send_entry->list);
559 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
560 dev_kfree_skb_any(skb);
561 kfree(send_entry);
562 if (cm_node->state == NES_CM_STATE_SYN_RCVD) {
563 /* this node never even generated an indication up to the cm */
564 rem_ref_cm_node(cm_core, cm_node);
565 } else {
566 cm_node->state = NES_CM_STATE_CLOSED;
567 create_event(cm_node, NES_CM_EVENT_ABORTED);
568 }
569 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
570 continue;
571 }
572 /* this seems like the correct place, but leave send entry unprotected */
573 // spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
574 atomic_inc(&send_entry->skb->users);
575 cm_packets_retrans++;
576 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p for node %p,"
577 " jiffies = %lu, time to send = %lu, retranscount = %u, "
578 "send_entry->seq_num = 0x%08X, cm_node->tcp_cntxt.rem_ack_num = 0x%08X\n",
579 send_entry, cm_node, jiffies, send_entry->timetosend, send_entry->retranscount,
580 send_entry->seq_num, cm_node->tcp_cntxt.rem_ack_num);
581
582 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
583 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
584 if (ret != NETDEV_TX_OK) {
585 cm_packets_bounced++;
586 atomic_dec(&send_entry->skb->users);
587 send_entry->retrycount--;
588 nexttimeout = jiffies + NES_SHORT_TIME;
589 settimer = 1;
590 node_done = 1;
591 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
592 continue;
593 } else {
594 cm_packets_sent++;
595 }
596 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
597 list_del(&send_entry->list);
598 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = %u, retry count = %u.\n",
599 send_entry->retranscount, send_entry->retrycount);
600 if (send_entry->send_retrans) {
601 send_entry->retranscount--;
602 send_entry->timetosend = jiffies + NES_RETRY_TIMEOUT;
603 if (nexttimeout > send_entry->timetosend || !settimer) {
604 nexttimeout = send_entry->timetosend;
605 settimer = 1;
606 }
607 list_add(&send_entry->list, &cm_node->retrans_list);
608 continue;
609 } else {
610 int close_when_complete;
611 skb = send_entry->skb;
612 close_when_complete = send_entry->close_when_complete;
613 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
614 if (close_when_complete) {
615 BUG_ON(atomic_read(&cm_node->ref_count) == 1);
616 rem_ref_cm_node(cm_core, cm_node);
617 }
618 dev_kfree_skb_any(skb);
619 kfree(send_entry);
620 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
621 continue;
622 }
623 }
624 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
625
626 rem_ref_cm_node(cm_core, cm_node);
627
628 spin_lock_irqsave(&cm_core->ht_lock, flags);
629 if (ret != NETDEV_TX_OK)
630 break;
631 }
632 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
633
634 if (settimer) {
635 if (!timer_pending(&cm_core->tcp_timer)) {
636 cm_core->tcp_timer.expires = nexttimeout;
637 add_timer(&cm_core->tcp_timer);
638 }
639 }
640 }
641
642
643 /**
644 * send_syn
645 */
646 int send_syn(struct nes_cm_node *cm_node, u32 sendack)
647 {
648 int ret;
649 int flags = SET_SYN;
650 struct sk_buff *skb;
651 char optionsbuffer[sizeof(struct option_mss) +
652 sizeof(struct option_windowscale) +
653 sizeof(struct option_base) + 1];
654
655 int optionssize = 0;
656 /* Sending MSS option */
657 union all_known_options *options;
658
659 if (!cm_node)
660 return -EINVAL;
661
662 options = (union all_known_options *)&optionsbuffer[optionssize];
663 options->as_mss.optionnum = OPTION_NUMBER_MSS;
664 options->as_mss.length = sizeof(struct option_mss);
665 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
666 optionssize += sizeof(struct option_mss);
667
668 options = (union all_known_options *)&optionsbuffer[optionssize];
669 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
670 options->as_windowscale.length = sizeof(struct option_windowscale);
671 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
672 optionssize += sizeof(struct option_windowscale);
673
674 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)
675 ) {
676 options = (union all_known_options *)&optionsbuffer[optionssize];
677 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
678 options->as_base.length = sizeof(struct option_base);
679 optionssize += sizeof(struct option_base);
680 /* we need the size to be a multiple of 4 */
681 options = (union all_known_options *)&optionsbuffer[optionssize];
682 options->as_end = 1;
683 optionssize += 1;
684 options = (union all_known_options *)&optionsbuffer[optionssize];
685 options->as_end = 1;
686 optionssize += 1;
687 }
688
689 options = (union all_known_options *)&optionsbuffer[optionssize];
690 options->as_end = OPTION_NUMBER_END;
691 optionssize += 1;
692
693 skb = get_free_pkt(cm_node);
694 if (!skb) {
695 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
696 return -1;
697 }
698
699 if (sendack)
700 flags |= SET_ACK;
701
702 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
703 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
704
705 return ret;
706 }
707
708
709 /**
710 * send_reset
711 */
712 int send_reset(struct nes_cm_node *cm_node)
713 {
714 int ret;
715 struct sk_buff *skb = get_free_pkt(cm_node);
716 int flags = SET_RST | SET_ACK;
717
718 if (!skb) {
719 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
720 return -1;
721 }
722
723 add_ref_cm_node(cm_node);
724 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
725 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
726
727 return ret;
728 }
729
730
731 /**
732 * send_ack
733 */
734 int send_ack(struct nes_cm_node *cm_node)
735 {
736 int ret;
737 struct sk_buff *skb = get_free_pkt(cm_node);
738
739 if (!skb) {
740 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
741 return -1;
742 }
743
744 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
745 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
746
747 return ret;
748 }
749
750
751 /**
752 * send_fin
753 */
754 int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
755 {
756 int ret;
757
758 /* if we didn't get a frame get one */
759 if (!skb)
760 skb = get_free_pkt(cm_node);
761
762 if (!skb) {
763 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
764 return -1;
765 }
766
767 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
768 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
769
770 return ret;
771 }
772
773
774 /**
775 * get_free_pkt
776 */
777 struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node)
778 {
779 struct sk_buff *skb, *new_skb;
780
781 /* check to see if we need to repopulate the free tx pkt queue */
782 if (skb_queue_len(&cm_node->cm_core->tx_free_list) < NES_CM_FREE_PKT_LO_WATERMARK) {
783 while (skb_queue_len(&cm_node->cm_core->tx_free_list) <
784 cm_node->cm_core->free_tx_pkt_max) {
785 /* replace the frame we took, we won't get it back */
786 new_skb = dev_alloc_skb(cm_node->cm_core->mtu);
787 BUG_ON(!new_skb);
788 /* add a replacement frame to the free tx list head */
789 skb_queue_head(&cm_node->cm_core->tx_free_list, new_skb);
790 }
791 }
792
793 skb = skb_dequeue(&cm_node->cm_core->tx_free_list);
794
795 return skb;
796 }
797
798
799 /**
800 * make_hashkey - generate hash key from node tuple
801 */
802 static inline int make_hashkey(u16 loc_port, nes_addr_t loc_addr, u16 rem_port,
803 nes_addr_t rem_addr)
804 {
805 u32 hashkey = 0;
806
807 hashkey = loc_addr + rem_addr + loc_port + rem_port;
808 hashkey = (hashkey % NES_CM_HASHTABLE_SIZE);
809
810 return hashkey;
811 }
812
813
814 /**
815 * find_node - find a cm node that matches the reference cm node
816 */
817 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
818 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
819 {
820 unsigned long flags;
821 u32 hashkey;
822 struct list_head *list_pos;
823 struct list_head *hte;
824 struct nes_cm_node *cm_node;
825
826 /* make a hash index key for this packet */
827 hashkey = make_hashkey(loc_port, loc_addr, rem_port, rem_addr);
828
829 /* get a handle on the hte */
830 hte = &cm_core->connected_nodes;
831
832 nes_debug(NES_DBG_CM, "Searching for an owner node:%x:%x from core %p->%p\n",
833 loc_addr, loc_port, cm_core, hte);
834
835 /* walk list and find cm_node associated with this session ID */
836 spin_lock_irqsave(&cm_core->ht_lock, flags);
837 list_for_each(list_pos, hte) {
838 cm_node = container_of(list_pos, struct nes_cm_node, list);
839 /* compare quad, return node handle if a match */
840 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
841 cm_node->loc_addr, cm_node->loc_port,
842 loc_addr, loc_port,
843 cm_node->rem_addr, cm_node->rem_port,
844 rem_addr, rem_port);
845 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
846 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
847 add_ref_cm_node(cm_node);
848 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
849 return cm_node;
850 }
851 }
852 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
853
854 /* no owner node */
855 return NULL;
856 }
857
858
859 /**
860 * find_listener - find a cm node listening on this addr-port pair
861 */
862 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
863 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
864 {
865 unsigned long flags;
866 struct list_head *listen_list;
867 struct nes_cm_listener *listen_node;
868
869 /* walk list and find cm_node associated with this session ID */
870 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
871 list_for_each(listen_list, &cm_core->listen_list.list) {
872 listen_node = container_of(listen_list, struct nes_cm_listener, list);
873 /* compare node pair, return node handle if a match */
874 if (((listen_node->loc_addr == dst_addr) ||
875 listen_node->loc_addr == 0x00000000) &&
876 (listen_node->loc_port == dst_port) &&
877 (listener_state & listen_node->listener_state)) {
878 atomic_inc(&listen_node->ref_count);
879 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
880 return listen_node;
881 }
882 }
883 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
884
885 nes_debug(NES_DBG_CM, "Unable to find listener- %x:%x\n",
886 dst_addr, dst_port);
887
888 /* no listener */
889 return NULL;
890 }
891
892
893 /**
894 * add_hte_node - add a cm node to the hash table
895 */
896 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
897 {
898 unsigned long flags;
899 u32 hashkey;
900 struct list_head *hte;
901
902 if (!cm_node || !cm_core)
903 return -EINVAL;
904
905 nes_debug(NES_DBG_CM, "Adding Node to Active Connection HT\n");
906
907 /* first, make an index into our hash table */
908 hashkey = make_hashkey(cm_node->loc_port, cm_node->loc_addr,
909 cm_node->rem_port, cm_node->rem_addr);
910 cm_node->hashkey = hashkey;
911
912 spin_lock_irqsave(&cm_core->ht_lock, flags);
913
914 /* get a handle on the hash table element (list head for this slot) */
915 hte = &cm_core->connected_nodes;
916 list_add_tail(&cm_node->list, hte);
917 atomic_inc(&cm_core->ht_node_cnt);
918
919 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
920
921 return 0;
922 }
923
924
925 /**
926 * mini_cm_dec_refcnt_listen
927 */
928 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
929 struct nes_cm_listener *listener, int free_hanging_nodes)
930 {
931 int ret = 1;
932 unsigned long flags;
933 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
934 if (!atomic_dec_return(&listener->ref_count)) {
935 list_del(&listener->list);
936
937 /* decrement our listen node count */
938 atomic_dec(&cm_core->listen_node_cnt);
939
940 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
941
942 if (listener->nesvnic) {
943 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
944 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
945 }
946
947 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
948
949 kfree(listener);
950 listener = NULL;
951 ret = 0;
952 cm_listens_destroyed++;
953 } else {
954 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
955 }
956 if (listener) {
957 if (atomic_read(&listener->pend_accepts_cnt) > 0)
958 nes_debug(NES_DBG_CM, "destroying listener (%p)"
959 " with non-zero pending accepts=%u\n",
960 listener, atomic_read(&listener->pend_accepts_cnt));
961 }
962
963 return ret;
964 }
965
966
967 /**
968 * mini_cm_del_listen
969 */
970 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
971 struct nes_cm_listener *listener)
972 {
973 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
974 listener->cm_id = NULL; /* going to be destroyed pretty soon */
975 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
976 }
977
978
979 /**
980 * mini_cm_accelerated
981 */
982 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
983 struct nes_cm_node *cm_node)
984 {
985 u32 was_timer_set;
986 cm_node->accelerated = 1;
987
988 if (cm_node->accept_pend) {
989 BUG_ON(!cm_node->listener);
990 atomic_dec(&cm_node->listener->pend_accepts_cnt);
991 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
992 }
993
994 was_timer_set = timer_pending(&cm_core->tcp_timer);
995 if (!was_timer_set) {
996 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
997 add_timer(&cm_core->tcp_timer);
998 }
999
1000 return 0;
1001 }
1002
1003
1004 /**
1005 * nes_addr_send_arp
1006 */
1007 static void nes_addr_send_arp(u32 dst_ip)
1008 {
1009 struct rtable *rt;
1010 struct flowi fl;
1011
1012 memset(&fl, 0, sizeof fl);
1013 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1014 if (ip_route_output_key(&init_net, &rt, &fl)) {
1015 printk("%s: ip_route_output_key failed for 0x%08X\n",
1016 __FUNCTION__, dst_ip);
1017 return;
1018 }
1019
1020 neigh_event_send(rt->u.dst.neighbour, NULL);
1021 ip_rt_put(rt);
1022 }
1023
1024
1025 /**
1026 * make_cm_node - create a new instance of a cm node
1027 */
1028 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1029 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1030 struct nes_cm_listener *listener)
1031 {
1032 struct nes_cm_node *cm_node;
1033 struct timespec ts;
1034 int arpindex = 0;
1035 struct nes_device *nesdev;
1036 struct nes_adapter *nesadapter;
1037
1038 /* create an hte and cm_node for this instance */
1039 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1040 if (!cm_node)
1041 return NULL;
1042
1043 /* set our node specific transport info */
1044 cm_node->loc_addr = cm_info->loc_addr;
1045 cm_node->rem_addr = cm_info->rem_addr;
1046 cm_node->loc_port = cm_info->loc_port;
1047 cm_node->rem_port = cm_info->rem_port;
1048 cm_node->send_write0 = send_first;
1049 nes_debug(NES_DBG_CM, "Make node addresses : loc = %x:%x, rem = %x:%x\n",
1050 cm_node->loc_addr, cm_node->loc_port, cm_node->rem_addr, cm_node->rem_port);
1051 cm_node->listener = listener;
1052 cm_node->netdev = nesvnic->netdev;
1053 cm_node->cm_id = cm_info->cm_id;
1054 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1055
1056 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n",
1057 cm_node->listener, cm_node->cm_id);
1058
1059 INIT_LIST_HEAD(&cm_node->retrans_list);
1060 spin_lock_init(&cm_node->retrans_list_lock);
1061 INIT_LIST_HEAD(&cm_node->recv_list);
1062 spin_lock_init(&cm_node->recv_list_lock);
1063
1064 cm_node->loopbackpartner = NULL;
1065 atomic_set(&cm_node->ref_count, 1);
1066 /* associate our parent CM core */
1067 cm_node->cm_core = cm_core;
1068 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1069 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1070 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1071 NES_CM_DEFAULT_RCV_WND_SCALE;
1072 ts = current_kernel_time();
1073 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1074 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1075 sizeof(struct tcphdr) - ETH_HLEN;
1076 cm_node->tcp_cntxt.rcv_nxt = 0;
1077 /* get a unique session ID , add thread_id to an upcounter to handle race */
1078 atomic_inc(&cm_core->node_cnt);
1079 atomic_inc(&cm_core->session_id);
1080 cm_node->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid);
1081 cm_node->conn_type = cm_info->conn_type;
1082 cm_node->apbvt_set = 0;
1083 cm_node->accept_pend = 0;
1084
1085 cm_node->nesvnic = nesvnic;
1086 /* get some device handles, for arp lookup */
1087 nesdev = nesvnic->nesdev;
1088 nesadapter = nesdev->nesadapter;
1089
1090 cm_node->loopbackpartner = NULL;
1091 /* get the mac addr for the remote node */
1092 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1093 if (arpindex < 0) {
1094 kfree(cm_node);
1095 nes_addr_send_arp(cm_info->rem_addr);
1096 return NULL;
1097 }
1098
1099 /* copy the mac addr to node context */
1100 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1101 nes_debug(NES_DBG_CM, "Remote mac addr from arp table:%02x,"
1102 " %02x, %02x, %02x, %02x, %02x\n",
1103 cm_node->rem_mac[0], cm_node->rem_mac[1],
1104 cm_node->rem_mac[2], cm_node->rem_mac[3],
1105 cm_node->rem_mac[4], cm_node->rem_mac[5]);
1106
1107 add_hte_node(cm_core, cm_node);
1108 atomic_inc(&cm_nodes_created);
1109
1110 return cm_node;
1111 }
1112
1113
1114 /**
1115 * add_ref_cm_node - destroy an instance of a cm node
1116 */
1117 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1118 {
1119 atomic_inc(&cm_node->ref_count);
1120 return 0;
1121 }
1122
1123
1124 /**
1125 * rem_ref_cm_node - destroy an instance of a cm node
1126 */
1127 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1128 struct nes_cm_node *cm_node)
1129 {
1130 unsigned long flags, qplockflags;
1131 struct nes_timer_entry *send_entry;
1132 struct nes_timer_entry *recv_entry;
1133 struct iw_cm_id *cm_id;
1134 struct list_head *list_core, *list_node_temp;
1135 struct nes_qp *nesqp;
1136
1137 if (!cm_node)
1138 return -EINVAL;
1139
1140 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1141 if (atomic_dec_return(&cm_node->ref_count)) {
1142 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1143 return 0;
1144 }
1145 list_del(&cm_node->list);
1146 atomic_dec(&cm_core->ht_node_cnt);
1147 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1148
1149 /* if the node is destroyed before connection was accelerated */
1150 if (!cm_node->accelerated && cm_node->accept_pend) {
1151 BUG_ON(!cm_node->listener);
1152 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1153 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1154 }
1155
1156 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1157 list_for_each_safe(list_core, list_node_temp, &cm_node->retrans_list) {
1158 send_entry = container_of(list_core, struct nes_timer_entry, list);
1159 list_del(&send_entry->list);
1160 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1161 dev_kfree_skb_any(send_entry->skb);
1162 kfree(send_entry);
1163 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1164 continue;
1165 }
1166 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1167
1168 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1169 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
1170 recv_entry = container_of(list_core, struct nes_timer_entry, list);
1171 list_del(&recv_entry->list);
1172 cm_id = cm_node->cm_id;
1173 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1174 if (recv_entry->type == NES_TIMER_TYPE_CLOSE) {
1175 nesqp = (struct nes_qp *)recv_entry->skb;
1176 spin_lock_irqsave(&nesqp->lock, qplockflags);
1177 if (nesqp->cm_id) {
1178 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: ****** HIT A NES_TIMER_TYPE_CLOSE"
1179 " with something to do!!! ******\n",
1180 nesqp->hwqp.qp_id, cm_id);
1181 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1182 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1183 nesqp->ibqp_state = IB_QPS_ERR;
1184 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1185 nes_cm_disconn(nesqp);
1186 } else {
1187 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1188 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: ****** HIT A NES_TIMER_TYPE_CLOSE"
1189 " with nothing to do!!! ******\n",
1190 nesqp->hwqp.qp_id, cm_id);
1191 nes_rem_ref(&nesqp->ibqp);
1192 }
1193 cm_id->rem_ref(cm_id);
1194 } else if (recv_entry->type == NES_TIMER_TYPE_RECV) {
1195 dev_kfree_skb_any(recv_entry->skb);
1196 }
1197 kfree(recv_entry);
1198 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1199 }
1200 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1201
1202 if (cm_node->listener) {
1203 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1204 } else {
1205 if (cm_node->apbvt_set && cm_node->nesvnic) {
1206 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1207 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1208 NES_MANAGE_APBVT_DEL);
1209 }
1210 }
1211
1212 kfree(cm_node);
1213 atomic_dec(&cm_core->node_cnt);
1214 atomic_inc(&cm_nodes_destroyed);
1215
1216 return 0;
1217 }
1218
1219
1220 /**
1221 * process_options
1222 */
1223 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc, u32 optionsize, u32 syn_packet)
1224 {
1225 u32 tmp;
1226 u32 offset = 0;
1227 union all_known_options *all_options;
1228 char got_mss_option = 0;
1229
1230 while (offset < optionsize) {
1231 all_options = (union all_known_options *)(optionsloc + offset);
1232 switch (all_options->as_base.optionnum) {
1233 case OPTION_NUMBER_END:
1234 offset = optionsize;
1235 break;
1236 case OPTION_NUMBER_NONE:
1237 offset += 1;
1238 continue;
1239 case OPTION_NUMBER_MSS:
1240 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d Size: %d\n",
1241 __FUNCTION__,
1242 all_options->as_mss.length, offset, optionsize);
1243 got_mss_option = 1;
1244 if (all_options->as_mss.length != 4) {
1245 return 1;
1246 } else {
1247 tmp = ntohs(all_options->as_mss.mss);
1248 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
1249 cm_node->tcp_cntxt.mss = tmp;
1250 }
1251 break;
1252 case OPTION_NUMBER_WINDOW_SCALE:
1253 cm_node->tcp_cntxt.snd_wscale = all_options->as_windowscale.shiftcount;
1254 break;
1255 case OPTION_NUMBER_WRITE0:
1256 cm_node->send_write0 = 1;
1257 break;
1258 default:
1259 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1260 all_options->as_base.optionnum);
1261 break;
1262 }
1263 offset += all_options->as_base.length;
1264 }
1265 if ((!got_mss_option) && (syn_packet))
1266 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1267 return 0;
1268 }
1269
1270
1271 /**
1272 * process_packet
1273 */
1274 int process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1275 struct nes_cm_core *cm_core)
1276 {
1277 int optionsize;
1278 int datasize;
1279 int ret = 0;
1280 struct tcphdr *tcph = tcp_hdr(skb);
1281 u32 inc_sequence;
1282 if (cm_node->state == NES_CM_STATE_SYN_SENT && tcph->syn) {
1283 inc_sequence = ntohl(tcph->seq);
1284 cm_node->tcp_cntxt.rcv_nxt = inc_sequence;
1285 }
1286
1287 if ((!tcph) || (cm_node->state == NES_CM_STATE_TSA)) {
1288 BUG_ON(!tcph);
1289 atomic_inc(&cm_accel_dropped_pkts);
1290 return -1;
1291 }
1292
1293 if (tcph->rst) {
1294 atomic_inc(&cm_resets_recvd);
1295 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u. refcnt=%d\n",
1296 cm_node, cm_node->state, atomic_read(&cm_node->ref_count));
1297 switch (cm_node->state) {
1298 case NES_CM_STATE_LISTENING:
1299 rem_ref_cm_node(cm_core, cm_node);
1300 break;
1301 case NES_CM_STATE_TSA:
1302 case NES_CM_STATE_CLOSED:
1303 break;
1304 case NES_CM_STATE_SYN_RCVD:
1305 nes_debug(NES_DBG_CM, "Received a reset for local 0x%08X:%04X,"
1306 " remote 0x%08X:%04X, node state = %u\n",
1307 cm_node->loc_addr, cm_node->loc_port,
1308 cm_node->rem_addr, cm_node->rem_port,
1309 cm_node->state);
1310 rem_ref_cm_node(cm_core, cm_node);
1311 break;
1312 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1313 case NES_CM_STATE_ESTABLISHED:
1314 case NES_CM_STATE_MPAREQ_SENT:
1315 default:
1316 nes_debug(NES_DBG_CM, "Received a reset for local 0x%08X:%04X,"
1317 " remote 0x%08X:%04X, node state = %u refcnt=%d\n",
1318 cm_node->loc_addr, cm_node->loc_port,
1319 cm_node->rem_addr, cm_node->rem_port,
1320 cm_node->state, atomic_read(&cm_node->ref_count));
1321 // create event
1322 cm_node->state = NES_CM_STATE_CLOSED;
1323
1324 create_event(cm_node, NES_CM_EVENT_ABORTED);
1325 break;
1326
1327 }
1328 return -1;
1329 }
1330
1331 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1332
1333 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1334 skb_pull(skb, tcph->doff << 2);
1335
1336 datasize = skb->len;
1337 inc_sequence = ntohl(tcph->seq);
1338 nes_debug(NES_DBG_CM, "datasize = %u, sequence = 0x%08X, ack_seq = 0x%08X,"
1339 " rcv_nxt = 0x%08X Flags: %s %s.\n",
1340 datasize, inc_sequence, ntohl(tcph->ack_seq),
1341 cm_node->tcp_cntxt.rcv_nxt, (tcph->syn ? "SYN":""),
1342 (tcph->ack ? "ACK":""));
1343
1344 if (!tcph->syn && (inc_sequence != cm_node->tcp_cntxt.rcv_nxt)
1345 ) {
1346 nes_debug(NES_DBG_CM, "dropping packet, datasize = %u, sequence = 0x%08X,"
1347 " ack_seq = 0x%08X, rcv_nxt = 0x%08X Flags: %s.\n",
1348 datasize, inc_sequence, ntohl(tcph->ack_seq),
1349 cm_node->tcp_cntxt.rcv_nxt, (tcph->ack ? "ACK":""));
1350 if (cm_node->state == NES_CM_STATE_LISTENING) {
1351 rem_ref_cm_node(cm_core, cm_node);
1352 }
1353 return -1;
1354 }
1355
1356 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1357
1358
1359 if (optionsize) {
1360 u8 *optionsloc = (u8 *)&tcph[1];
1361 if (process_options(cm_node, optionsloc, optionsize, (u32)tcph->syn)) {
1362 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n", __FUNCTION__, cm_node);
1363 send_reset(cm_node);
1364 if (cm_node->state != NES_CM_STATE_SYN_SENT)
1365 rem_ref_cm_node(cm_core, cm_node);
1366 return 0;
1367 }
1368 } else if (tcph->syn)
1369 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1370
1371 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1372 cm_node->tcp_cntxt.snd_wscale;
1373
1374 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) {
1375 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1376 }
1377
1378 if (tcph->ack) {
1379 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1380 switch (cm_node->state) {
1381 case NES_CM_STATE_SYN_RCVD:
1382 case NES_CM_STATE_SYN_SENT:
1383 /* read and stash current sequence number */
1384 if (cm_node->tcp_cntxt.rem_ack_num != cm_node->tcp_cntxt.loc_seq_num) {
1385 nes_debug(NES_DBG_CM, "ERROR - cm_node->tcp_cntxt.rem_ack_num !="
1386 " cm_node->tcp_cntxt.loc_seq_num\n");
1387 send_reset(cm_node);
1388 return 0;
1389 }
1390 if (cm_node->state == NES_CM_STATE_SYN_SENT)
1391 cm_node->state = NES_CM_STATE_ONE_SIDE_ESTABLISHED;
1392 else {
1393 cm_node->state = NES_CM_STATE_ESTABLISHED;
1394 }
1395 break;
1396 case NES_CM_STATE_LAST_ACK:
1397 cm_node->state = NES_CM_STATE_CLOSED;
1398 break;
1399 case NES_CM_STATE_FIN_WAIT1:
1400 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1401 break;
1402 case NES_CM_STATE_CLOSING:
1403 cm_node->state = NES_CM_STATE_TIME_WAIT;
1404 /* need to schedule this to happen in 2MSL timeouts */
1405 cm_node->state = NES_CM_STATE_CLOSED;
1406 break;
1407 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1408 case NES_CM_STATE_ESTABLISHED:
1409 case NES_CM_STATE_MPAREQ_SENT:
1410 case NES_CM_STATE_CLOSE_WAIT:
1411 case NES_CM_STATE_TIME_WAIT:
1412 case NES_CM_STATE_CLOSED:
1413 break;
1414 case NES_CM_STATE_LISTENING:
1415 nes_debug(NES_DBG_CM, "Received an ACK on a listening port (SYN %d)\n", tcph->syn);
1416 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1417 send_reset(cm_node);
1418 /* send_reset bumps refcount, this should have been a new node */
1419 rem_ref_cm_node(cm_core, cm_node);
1420 return -1;
1421 break;
1422 case NES_CM_STATE_TSA:
1423 nes_debug(NES_DBG_CM, "Received a packet with the ack bit set while in TSA state\n");
1424 break;
1425 case NES_CM_STATE_UNKNOWN:
1426 case NES_CM_STATE_INITED:
1427 case NES_CM_STATE_ACCEPTING:
1428 case NES_CM_STATE_FIN_WAIT2:
1429 default:
1430 nes_debug(NES_DBG_CM, "Received ack from unknown state: %x\n",
1431 cm_node->state);
1432 send_reset(cm_node);
1433 break;
1434 }
1435 }
1436
1437 if (tcph->syn) {
1438 if (cm_node->state == NES_CM_STATE_LISTENING) {
1439 /* do not exceed backlog */
1440 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1441 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1442 cm_node->listener->backlog) {
1443 nes_debug(NES_DBG_CM, "drop syn due to backlog pressure \n");
1444 cm_backlog_drops++;
1445 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1446 rem_ref_cm_node(cm_core, cm_node);
1447 return 0;
1448 }
1449 cm_node->accept_pend = 1;
1450
1451 }
1452 if (datasize == 0)
1453 cm_node->tcp_cntxt.rcv_nxt ++;
1454
1455 if (cm_node->state == NES_CM_STATE_LISTENING) {
1456 cm_node->state = NES_CM_STATE_SYN_RCVD;
1457 send_syn(cm_node, 1);
1458 }
1459 if (cm_node->state == NES_CM_STATE_ONE_SIDE_ESTABLISHED) {
1460 cm_node->state = NES_CM_STATE_ESTABLISHED;
1461 /* send final handshake ACK */
1462 ret = send_ack(cm_node);
1463 if (ret < 0)
1464 return ret;
1465
1466 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1467 ret = send_mpa_request(cm_node);
1468 if (ret < 0)
1469 return ret;
1470 }
1471 }
1472
1473 if (tcph->fin) {
1474 cm_node->tcp_cntxt.rcv_nxt++;
1475 switch (cm_node->state) {
1476 case NES_CM_STATE_SYN_RCVD:
1477 case NES_CM_STATE_SYN_SENT:
1478 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1479 case NES_CM_STATE_ESTABLISHED:
1480 case NES_CM_STATE_ACCEPTING:
1481 case NES_CM_STATE_MPAREQ_SENT:
1482 cm_node->state = NES_CM_STATE_CLOSE_WAIT;
1483 cm_node->state = NES_CM_STATE_LAST_ACK;
1484 ret = send_fin(cm_node, NULL);
1485 break;
1486 case NES_CM_STATE_FIN_WAIT1:
1487 cm_node->state = NES_CM_STATE_CLOSING;
1488 ret = send_ack(cm_node);
1489 break;
1490 case NES_CM_STATE_FIN_WAIT2:
1491 cm_node->state = NES_CM_STATE_TIME_WAIT;
1492 cm_node->tcp_cntxt.loc_seq_num ++;
1493 ret = send_ack(cm_node);
1494 /* need to schedule this to happen in 2MSL timeouts */
1495 cm_node->state = NES_CM_STATE_CLOSED;
1496 break;
1497 case NES_CM_STATE_CLOSE_WAIT:
1498 case NES_CM_STATE_LAST_ACK:
1499 case NES_CM_STATE_CLOSING:
1500 case NES_CM_STATE_TSA:
1501 default:
1502 nes_debug(NES_DBG_CM, "Received a fin while in %x state\n",
1503 cm_node->state);
1504 ret = -EINVAL;
1505 break;
1506 }
1507 }
1508
1509 if (datasize) {
1510 u8 *dataloc = skb->data;
1511 /* figure out what state we are in and handle transition to next state */
1512 switch (cm_node->state) {
1513 case NES_CM_STATE_LISTENING:
1514 case NES_CM_STATE_SYN_RCVD:
1515 case NES_CM_STATE_SYN_SENT:
1516 case NES_CM_STATE_FIN_WAIT1:
1517 case NES_CM_STATE_FIN_WAIT2:
1518 case NES_CM_STATE_CLOSE_WAIT:
1519 case NES_CM_STATE_LAST_ACK:
1520 case NES_CM_STATE_CLOSING:
1521 break;
1522 case NES_CM_STATE_MPAREQ_SENT:
1523 /* recv the mpa res frame, ret=frame len (incl priv data) */
1524 ret = parse_mpa(cm_node, dataloc, datasize);
1525 if (ret < 0)
1526 break;
1527 /* set the req frame payload len in skb */
1528 /* we are done handling this state, set node to a TSA state */
1529 cm_node->state = NES_CM_STATE_TSA;
1530 send_ack(cm_node);
1531 create_event(cm_node, NES_CM_EVENT_CONNECTED);
1532 break;
1533
1534 case NES_CM_STATE_ESTABLISHED:
1535 /* we are expecting an MPA req frame */
1536 ret = parse_mpa(cm_node, dataloc, datasize);
1537 if (ret < 0) {
1538 break;
1539 }
1540 cm_node->state = NES_CM_STATE_TSA;
1541 send_ack(cm_node);
1542 /* we got a valid MPA request, create an event */
1543 create_event(cm_node, NES_CM_EVENT_MPA_REQ);
1544 break;
1545 case NES_CM_STATE_TSA:
1546 handle_exception_pkt(cm_node, skb);
1547 break;
1548 case NES_CM_STATE_UNKNOWN:
1549 case NES_CM_STATE_INITED:
1550 default:
1551 ret = -1;
1552 }
1553 }
1554
1555 return ret;
1556 }
1557
1558
1559 /**
1560 * mini_cm_listen - create a listen node with params
1561 */
1562 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1563 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1564 {
1565 struct nes_cm_listener *listener;
1566 unsigned long flags;
1567
1568 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1569 cm_info->loc_addr, cm_info->loc_port);
1570
1571 /* cannot have multiple matching listeners */
1572 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1573 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1574 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1575 /* find automatically incs ref count ??? */
1576 atomic_dec(&listener->ref_count);
1577 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1578 return NULL;
1579 }
1580
1581 if (!listener) {
1582 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1583 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1584 if (!listener) {
1585 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1586 return NULL;
1587 }
1588
1589 memset(listener, 0, sizeof(struct nes_cm_listener));
1590 listener->loc_addr = htonl(cm_info->loc_addr);
1591 listener->loc_port = htons(cm_info->loc_port);
1592 listener->reused_node = 0;
1593
1594 atomic_set(&listener->ref_count, 1);
1595 }
1596 /* pasive case */
1597 /* find already inc'ed the ref count */
1598 else {
1599 listener->reused_node = 1;
1600 }
1601
1602 listener->cm_id = cm_info->cm_id;
1603 atomic_set(&listener->pend_accepts_cnt, 0);
1604 listener->cm_core = cm_core;
1605 listener->nesvnic = nesvnic;
1606 atomic_inc(&cm_core->node_cnt);
1607 atomic_inc(&cm_core->session_id);
1608
1609 listener->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid);
1610 listener->conn_type = cm_info->conn_type;
1611 listener->backlog = cm_info->backlog;
1612 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1613
1614 if (!listener->reused_node) {
1615 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1616 list_add(&listener->list, &cm_core->listen_list.list);
1617 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1618 atomic_inc(&cm_core->listen_node_cnt);
1619 }
1620
1621 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1622 " listener = %p, backlog = %d, cm_id = %p.\n",
1623 cm_info->loc_addr, cm_info->loc_port,
1624 listener, listener->backlog, listener->cm_id);
1625
1626 return listener;
1627 }
1628
1629
1630 /**
1631 * mini_cm_connect - make a connection node with params
1632 */
1633 struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1634 struct nes_vnic *nesvnic, struct ietf_mpa_frame *mpa_frame,
1635 struct nes_cm_info *cm_info)
1636 {
1637 int ret = 0;
1638 struct nes_cm_node *cm_node;
1639 struct nes_cm_listener *loopbackremotelistener;
1640 struct nes_cm_node *loopbackremotenode;
1641 struct nes_cm_info loopback_cm_info;
1642
1643 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) +
1644 ntohs(mpa_frame->priv_data_len);
1645
1646 cm_info->loc_addr = htonl(cm_info->loc_addr);
1647 cm_info->rem_addr = htonl(cm_info->rem_addr);
1648 cm_info->loc_port = htons(cm_info->loc_port);
1649 cm_info->rem_port = htons(cm_info->rem_port);
1650
1651 /* create a CM connection node */
1652 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1653 if (!cm_node)
1654 return NULL;
1655
1656 // set our node side to client (active) side
1657 cm_node->tcp_cntxt.client = 1;
1658 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1659
1660 if (cm_info->loc_addr == cm_info->rem_addr) {
1661 loopbackremotelistener = find_listener(cm_core, cm_node->rem_addr,
1662 cm_node->rem_port, NES_CM_LISTENER_ACTIVE_STATE);
1663 if (loopbackremotelistener == NULL) {
1664 create_event(cm_node, NES_CM_EVENT_ABORTED);
1665 } else {
1666 atomic_inc(&cm_loopbacks);
1667 loopback_cm_info = *cm_info;
1668 loopback_cm_info.loc_port = cm_info->rem_port;
1669 loopback_cm_info.rem_port = cm_info->loc_port;
1670 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
1671 loopbackremotenode = make_cm_node(cm_core, nesvnic, &loopback_cm_info,
1672 loopbackremotelistener);
1673 loopbackremotenode->loopbackpartner = cm_node;
1674 loopbackremotenode->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1675 cm_node->loopbackpartner = loopbackremotenode;
1676 memcpy(loopbackremotenode->mpa_frame_buf, &mpa_frame->priv_data,
1677 mpa_frame_size);
1678 loopbackremotenode->mpa_frame_size = mpa_frame_size -
1679 sizeof(struct ietf_mpa_frame);
1680
1681 // we are done handling this state, set node to a TSA state
1682 cm_node->state = NES_CM_STATE_TSA;
1683 cm_node->tcp_cntxt.rcv_nxt = loopbackremotenode->tcp_cntxt.loc_seq_num;
1684 loopbackremotenode->tcp_cntxt.rcv_nxt = cm_node->tcp_cntxt.loc_seq_num;
1685 cm_node->tcp_cntxt.max_snd_wnd = loopbackremotenode->tcp_cntxt.rcv_wnd;
1686 loopbackremotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
1687 cm_node->tcp_cntxt.snd_wnd = loopbackremotenode->tcp_cntxt.rcv_wnd;
1688 loopbackremotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
1689 cm_node->tcp_cntxt.snd_wscale = loopbackremotenode->tcp_cntxt.rcv_wscale;
1690 loopbackremotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
1691
1692 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1693 }
1694 return cm_node;
1695 }
1696
1697 /* set our node side to client (active) side */
1698 cm_node->tcp_cntxt.client = 1;
1699 /* init our MPA frame ptr */
1700 memcpy(&cm_node->mpa_frame, mpa_frame, mpa_frame_size);
1701 cm_node->mpa_frame_size = mpa_frame_size;
1702
1703 /* send a syn and goto syn sent state */
1704 cm_node->state = NES_CM_STATE_SYN_SENT;
1705 ret = send_syn(cm_node, 0);
1706
1707 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X, port=0x%04x,"
1708 " cm_node=%p, cm_id = %p.\n",
1709 cm_node->rem_addr, cm_node->rem_port, cm_node, cm_node->cm_id);
1710
1711 return cm_node;
1712 }
1713
1714
1715 /**
1716 * mini_cm_accept - accept a connection
1717 * This function is never called
1718 */
1719 int mini_cm_accept(struct nes_cm_core *cm_core, struct ietf_mpa_frame *mpa_frame,
1720 struct nes_cm_node *cm_node)
1721 {
1722 return 0;
1723 }
1724
1725
1726 /**
1727 * mini_cm_reject - reject and teardown a connection
1728 */
1729 int mini_cm_reject(struct nes_cm_core *cm_core,
1730 struct ietf_mpa_frame *mpa_frame,
1731 struct nes_cm_node *cm_node)
1732 {
1733 int ret = 0;
1734 struct sk_buff *skb;
1735 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) +
1736 ntohs(mpa_frame->priv_data_len);
1737
1738 skb = get_free_pkt(cm_node);
1739 if (!skb) {
1740 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1741 return -1;
1742 }
1743
1744 /* send an MPA Request frame */
1745 form_cm_frame(skb, cm_node, NULL, 0, mpa_frame, mpa_frame_size, SET_ACK | SET_FIN);
1746 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1747
1748 cm_node->state = NES_CM_STATE_CLOSED;
1749 ret = send_fin(cm_node, NULL);
1750
1751 if (ret < 0) {
1752 printk(KERN_INFO PFX "failed to send MPA Reply (reject)\n");
1753 return ret;
1754 }
1755
1756 return ret;
1757 }
1758
1759
1760 /**
1761 * mini_cm_close
1762 */
1763 int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1764 {
1765 int ret = 0;
1766
1767 if (!cm_core || !cm_node)
1768 return -EINVAL;
1769
1770 switch (cm_node->state) {
1771 /* if passed in node is null, create a reference key node for node search */
1772 /* check if we found an owner node for this pkt */
1773 case NES_CM_STATE_SYN_RCVD:
1774 case NES_CM_STATE_SYN_SENT:
1775 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1776 case NES_CM_STATE_ESTABLISHED:
1777 case NES_CM_STATE_ACCEPTING:
1778 case NES_CM_STATE_MPAREQ_SENT:
1779 cm_node->state = NES_CM_STATE_FIN_WAIT1;
1780 send_fin(cm_node, NULL);
1781 break;
1782 case NES_CM_STATE_CLOSE_WAIT:
1783 cm_node->state = NES_CM_STATE_LAST_ACK;
1784 send_fin(cm_node, NULL);
1785 break;
1786 case NES_CM_STATE_FIN_WAIT1:
1787 case NES_CM_STATE_FIN_WAIT2:
1788 case NES_CM_STATE_LAST_ACK:
1789 case NES_CM_STATE_TIME_WAIT:
1790 case NES_CM_STATE_CLOSING:
1791 ret = -1;
1792 break;
1793 case NES_CM_STATE_LISTENING:
1794 case NES_CM_STATE_UNKNOWN:
1795 case NES_CM_STATE_INITED:
1796 case NES_CM_STATE_CLOSED:
1797 case NES_CM_STATE_TSA:
1798 ret = rem_ref_cm_node(cm_core, cm_node);
1799 break;
1800 }
1801 cm_node->cm_id = NULL;
1802 return ret;
1803 }
1804
1805
1806 /**
1807 * recv_pkt - recv an ETHERNET packet, and process it through CM
1808 * node state machine
1809 */
1810 int mini_cm_recv_pkt(struct nes_cm_core *cm_core, struct nes_vnic *nesvnic,
1811 struct sk_buff *skb)
1812 {
1813 struct nes_cm_node *cm_node = NULL;
1814 struct nes_cm_listener *listener = NULL;
1815 struct iphdr *iph;
1816 struct tcphdr *tcph;
1817 struct nes_cm_info nfo;
1818 int ret = 0;
1819
1820 if (!skb || skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
1821 ret = -EINVAL;
1822 goto out;
1823 }
1824
1825 iph = (struct iphdr *)skb->data;
1826 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
1827 skb_reset_network_header(skb);
1828 skb_set_transport_header(skb, sizeof(*tcph));
1829 skb->len = ntohs(iph->tot_len);
1830
1831 nfo.loc_addr = ntohl(iph->daddr);
1832 nfo.loc_port = ntohs(tcph->dest);
1833 nfo.rem_addr = ntohl(iph->saddr);
1834 nfo.rem_port = ntohs(tcph->source);
1835
1836 nes_debug(NES_DBG_CM, "Received packet: dest=0x%08X:0x%04X src=0x%08X:0x%04X\n",
1837 iph->daddr, tcph->dest, iph->saddr, tcph->source);
1838
1839 /* note: this call is going to increment cm_node ref count */
1840 cm_node = find_node(cm_core,
1841 nfo.rem_port, nfo.rem_addr,
1842 nfo.loc_port, nfo.loc_addr);
1843
1844 if (!cm_node) {
1845 listener = find_listener(cm_core, nfo.loc_addr, nfo.loc_port,
1846 NES_CM_LISTENER_ACTIVE_STATE);
1847 if (listener) {
1848 nfo.cm_id = listener->cm_id;
1849 nfo.conn_type = listener->conn_type;
1850 } else {
1851 nfo.cm_id = NULL;
1852 nfo.conn_type = 0;
1853 }
1854
1855 cm_node = make_cm_node(cm_core, nesvnic, &nfo, listener);
1856 if (!cm_node) {
1857 nes_debug(NES_DBG_CM, "Unable to allocate node\n");
1858 if (listener) {
1859 nes_debug(NES_DBG_CM, "unable to allocate node and decrementing listener refcount\n");
1860 atomic_dec(&listener->ref_count);
1861 }
1862 ret = -1;
1863 goto out;
1864 }
1865 if (!listener) {
1866 nes_debug(NES_DBG_CM, "Packet found for unknown port %x refcnt=%d\n",
1867 nfo.loc_port, atomic_read(&cm_node->ref_count));
1868 if (!tcph->rst) {
1869 nes_debug(NES_DBG_CM, "Packet found for unknown port=%d"
1870 " rem_port=%d refcnt=%d\n",
1871 nfo.loc_port, nfo.rem_port, atomic_read(&cm_node->ref_count));
1872
1873 cm_node->tcp_cntxt.rcv_nxt = ntohl(tcph->seq);
1874 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1875 send_reset(cm_node);
1876 }
1877 rem_ref_cm_node(cm_core, cm_node);
1878 ret = -1;
1879 goto out;
1880 }
1881 add_ref_cm_node(cm_node);
1882 cm_node->state = NES_CM_STATE_LISTENING;
1883 }
1884
1885 nes_debug(NES_DBG_CM, "Processing Packet for node %p, data = (%p):\n",
1886 cm_node, skb->data);
1887 process_packet(cm_node, skb, cm_core);
1888
1889 rem_ref_cm_node(cm_core, cm_node);
1890 out:
1891 if (skb)
1892 dev_kfree_skb_any(skb);
1893 return ret;
1894 }
1895
1896
1897 /**
1898 * nes_cm_alloc_core - allocate a top level instance of a cm core
1899 */
1900 struct nes_cm_core *nes_cm_alloc_core(void)
1901 {
1902 int i;
1903
1904 struct nes_cm_core *cm_core;
1905 struct sk_buff *skb = NULL;
1906
1907 /* setup the CM core */
1908 /* alloc top level core control structure */
1909 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
1910 if (!cm_core)
1911 return NULL;
1912
1913 INIT_LIST_HEAD(&cm_core->connected_nodes);
1914 init_timer(&cm_core->tcp_timer);
1915 cm_core->tcp_timer.function = nes_cm_timer_tick;
1916
1917 cm_core->mtu = NES_CM_DEFAULT_MTU;
1918 cm_core->state = NES_CM_STATE_INITED;
1919 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
1920
1921 atomic_set(&cm_core->session_id, 0);
1922 atomic_set(&cm_core->events_posted, 0);
1923
1924 /* init the packet lists */
1925 skb_queue_head_init(&cm_core->tx_free_list);
1926
1927 for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) {
1928 skb = dev_alloc_skb(cm_core->mtu);
1929 if (!skb) {
1930 kfree(cm_core);
1931 return NULL;
1932 }
1933 /* add 'raw' skb to free frame list */
1934 skb_queue_head(&cm_core->tx_free_list, skb);
1935 }
1936
1937 cm_core->api = &nes_cm_api;
1938
1939 spin_lock_init(&cm_core->ht_lock);
1940 spin_lock_init(&cm_core->listen_list_lock);
1941
1942 INIT_LIST_HEAD(&cm_core->listen_list.list);
1943
1944 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
1945
1946 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
1947 cm_core->event_wq = create_singlethread_workqueue("nesewq");
1948 cm_core->post_event = nes_cm_post_event;
1949 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
1950 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
1951
1952 print_core(cm_core);
1953 return cm_core;
1954 }
1955
1956
1957 /**
1958 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
1959 */
1960 int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
1961 {
1962 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
1963
1964 if (!cm_core)
1965 return -EINVAL;
1966
1967 barrier();
1968
1969 if (timer_pending(&cm_core->tcp_timer)) {
1970 del_timer(&cm_core->tcp_timer);
1971 }
1972
1973 destroy_workqueue(cm_core->event_wq);
1974 destroy_workqueue(cm_core->disconn_wq);
1975 nes_debug(NES_DBG_CM, "\n");
1976 kfree(cm_core);
1977
1978 return 0;
1979 }
1980
1981
1982 /**
1983 * mini_cm_get
1984 */
1985 int mini_cm_get(struct nes_cm_core *cm_core)
1986 {
1987 return cm_core->state;
1988 }
1989
1990
1991 /**
1992 * mini_cm_set
1993 */
1994 int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
1995 {
1996 int ret = 0;
1997
1998 switch (type) {
1999 case NES_CM_SET_PKT_SIZE:
2000 cm_core->mtu = value;
2001 break;
2002 case NES_CM_SET_FREE_PKT_Q_SIZE:
2003 cm_core->free_tx_pkt_max = value;
2004 break;
2005 default:
2006 /* unknown set option */
2007 ret = -EINVAL;
2008 }
2009
2010 return ret;
2011 }
2012
2013
2014 /**
2015 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2016 * successfully exchanged when this is called
2017 */
2018 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2019 {
2020 int ret = 0;
2021
2022 if (!nesqp)
2023 return -EINVAL;
2024
2025 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2026 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2027 NES_QPCONTEXT_MISC_DROS);
2028
2029 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2030 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2031
2032 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2033
2034 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2035
2036 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2037 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2038
2039 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2040 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2041 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2042
2043 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2044 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2045 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2046
2047 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2048 nesqp->nesqp_context->ts_recent = 0;
2049 nesqp->nesqp_context->ts_age = 0;
2050 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2051 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2052 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2053 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2054 cm_node->tcp_cntxt.rcv_wscale);
2055 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2056 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2057 nesqp->nesqp_context->srtt = 0;
2058 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2059 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2060 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2061 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2062 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2063 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2064
2065 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2066 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2067 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2068 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2069 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2070 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2071 le32_to_cpu(nesqp->nesqp_context->misc));
2072 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2073 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2074 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2075
2076 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2077 cm_node->state = NES_CM_STATE_TSA;
2078
2079 return ret;
2080 }
2081
2082
2083 /**
2084 * nes_cm_disconn
2085 */
2086 int nes_cm_disconn(struct nes_qp *nesqp)
2087 {
2088 unsigned long flags;
2089
2090 spin_lock_irqsave(&nesqp->lock, flags);
2091 if (nesqp->disconn_pending == 0) {
2092 nesqp->disconn_pending++;
2093 spin_unlock_irqrestore(&nesqp->lock, flags);
2094 /* nes_add_ref(&nesqp->ibqp); */
2095 /* init our disconnect work element, to */
2096 INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
2097
2098 queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
2099 } else {
2100 spin_unlock_irqrestore(&nesqp->lock, flags);
2101 nes_rem_ref(&nesqp->ibqp);
2102 }
2103
2104 return 0;
2105 }
2106
2107
2108 /**
2109 * nes_disconnect_worker
2110 */
2111 void nes_disconnect_worker(struct work_struct *work)
2112 {
2113 struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
2114
2115 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2116 nesqp->last_aeq, nesqp->hwqp.qp_id);
2117 nes_cm_disconn_true(nesqp);
2118 }
2119
2120
2121 /**
2122 * nes_cm_disconn_true
2123 */
2124 int nes_cm_disconn_true(struct nes_qp *nesqp)
2125 {
2126 unsigned long flags;
2127 int ret = 0;
2128 struct iw_cm_id *cm_id;
2129 struct iw_cm_event cm_event;
2130 struct nes_vnic *nesvnic;
2131 u16 last_ae;
2132 u8 original_hw_tcp_state;
2133 u8 original_ibqp_state;
2134 u8 issued_disconnect_reset = 0;
2135
2136 if (!nesqp) {
2137 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2138 return -1;
2139 }
2140
2141 spin_lock_irqsave(&nesqp->lock, flags);
2142 cm_id = nesqp->cm_id;
2143 /* make sure we havent already closed this connection */
2144 if (!cm_id) {
2145 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2146 nesqp->hwqp.qp_id);
2147 spin_unlock_irqrestore(&nesqp->lock, flags);
2148 nes_rem_ref(&nesqp->ibqp);
2149 return -1;
2150 }
2151
2152 nesvnic = to_nesvnic(nesqp->ibqp.device);
2153 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2154
2155 original_hw_tcp_state = nesqp->hw_tcp_state;
2156 original_ibqp_state = nesqp->ibqp_state;
2157 last_ae = nesqp->last_aeq;
2158
2159
2160 nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
2161
2162 if ((nesqp->cm_id) && (cm_id->event_handler)) {
2163 if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2164 ((original_ibqp_state == IB_QPS_RTS) &&
2165 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2166 atomic_inc(&cm_disconnects);
2167 cm_event.event = IW_CM_EVENT_DISCONNECT;
2168 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
2169 issued_disconnect_reset = 1;
2170 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2171 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event (status reset) for "
2172 " QP%u, cm_id = %p. \n",
2173 nesqp->hwqp.qp_id, cm_id);
2174 } else {
2175 cm_event.status = IW_CM_EVENT_STATUS_OK;
2176 }
2177
2178 cm_event.local_addr = cm_id->local_addr;
2179 cm_event.remote_addr = cm_id->remote_addr;
2180 cm_event.private_data = NULL;
2181 cm_event.private_data_len = 0;
2182
2183 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event for "
2184 " QP%u, SQ Head = %u, SQ Tail = %u. cm_id = %p, refcount = %u.\n",
2185 nesqp->hwqp.qp_id,
2186 nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail, cm_id,
2187 atomic_read(&nesqp->refcount));
2188
2189 spin_unlock_irqrestore(&nesqp->lock, flags);
2190 ret = cm_id->event_handler(cm_id, &cm_event);
2191 if (ret)
2192 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2193 spin_lock_irqsave(&nesqp->lock, flags);
2194 }
2195
2196 nesqp->disconn_pending = 0;
2197 /* There might have been another AE while the lock was released */
2198 original_hw_tcp_state = nesqp->hw_tcp_state;
2199 original_ibqp_state = nesqp->ibqp_state;
2200 last_ae = nesqp->last_aeq;
2201
2202 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2203 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2204 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2205 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2206 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2207 atomic_inc(&cm_closes);
2208 nesqp->cm_id = NULL;
2209 nesqp->in_disconnect = 0;
2210 spin_unlock_irqrestore(&nesqp->lock, flags);
2211 nes_disconnect(nesqp, 1);
2212
2213 cm_id->provider_data = nesqp;
2214 /* Send up the close complete event */
2215 cm_event.event = IW_CM_EVENT_CLOSE;
2216 cm_event.status = IW_CM_EVENT_STATUS_OK;
2217 cm_event.provider_data = cm_id->provider_data;
2218 cm_event.local_addr = cm_id->local_addr;
2219 cm_event.remote_addr = cm_id->remote_addr;
2220 cm_event.private_data = NULL;
2221 cm_event.private_data_len = 0;
2222
2223 ret = cm_id->event_handler(cm_id, &cm_event);
2224 if (ret) {
2225 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2226 }
2227
2228 cm_id->rem_ref(cm_id);
2229
2230 spin_lock_irqsave(&nesqp->lock, flags);
2231 if (nesqp->flush_issued == 0) {
2232 nesqp->flush_issued = 1;
2233 spin_unlock_irqrestore(&nesqp->lock, flags);
2234 flush_wqes(nesvnic->nesdev, nesqp, NES_CQP_FLUSH_RQ, 1);
2235 } else {
2236 spin_unlock_irqrestore(&nesqp->lock, flags);
2237 }
2238
2239 /* This reference is from either ModifyQP or the AE processing,
2240 there is still a race here with modifyqp */
2241 nes_rem_ref(&nesqp->ibqp);
2242
2243 } else {
2244 cm_id = nesqp->cm_id;
2245 spin_unlock_irqrestore(&nesqp->lock, flags);
2246 /* check to see if the inbound reset beat the outbound reset */
2247 if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
2248 nes_debug(NES_DBG_CM, "QP%u: Decing refcount due to inbound reset"
2249 " beating the outbound reset.\n",
2250 nesqp->hwqp.qp_id);
2251 nes_rem_ref(&nesqp->ibqp);
2252 }
2253 }
2254 } else {
2255 nesqp->disconn_pending = 0;
2256 spin_unlock_irqrestore(&nesqp->lock, flags);
2257 }
2258 nes_rem_ref(&nesqp->ibqp);
2259
2260 return 0;
2261 }
2262
2263
2264 /**
2265 * nes_disconnect
2266 */
2267 int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2268 {
2269 int ret = 0;
2270 struct nes_vnic *nesvnic;
2271 struct nes_device *nesdev;
2272
2273 nesvnic = to_nesvnic(nesqp->ibqp.device);
2274 if (!nesvnic)
2275 return -EINVAL;
2276
2277 nesdev = nesvnic->nesdev;
2278
2279 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2280 atomic_read(&nesvnic->netdev->refcnt));
2281
2282 if (nesqp->active_conn) {
2283
2284 /* indicate this connection is NOT active */
2285 nesqp->active_conn = 0;
2286 } else {
2287 /* Need to free the Last Streaming Mode Message */
2288 if (nesqp->ietf_frame) {
2289 pci_free_consistent(nesdev->pcidev,
2290 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2291 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2292 }
2293 }
2294
2295 /* close the CM node down if it is still active */
2296 if (nesqp->cm_node) {
2297 nes_debug(NES_DBG_CM, "Call close API\n");
2298
2299 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2300 nesqp->cm_node = NULL;
2301 }
2302
2303 return ret;
2304 }
2305
2306
2307 /**
2308 * nes_accept
2309 */
2310 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2311 {
2312 u64 u64temp;
2313 struct ib_qp *ibqp;
2314 struct nes_qp *nesqp;
2315 struct nes_vnic *nesvnic;
2316 struct nes_device *nesdev;
2317 struct nes_cm_node *cm_node;
2318 struct nes_adapter *adapter;
2319 struct ib_qp_attr attr;
2320 struct iw_cm_event cm_event;
2321 struct nes_hw_qp_wqe *wqe;
2322 struct nes_v4_quad nes_quad;
2323 u32 crc_value;
2324 int ret;
2325
2326 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2327 if (!ibqp)
2328 return -EINVAL;
2329
2330 /* get all our handles */
2331 nesqp = to_nesqp(ibqp);
2332 nesvnic = to_nesvnic(nesqp->ibqp.device);
2333 nesdev = nesvnic->nesdev;
2334 adapter = nesdev->nesadapter;
2335
2336 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2337 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2338
2339 /* since this is from a listen, we were able to put node handle into cm_id */
2340 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2341
2342 /* associate the node with the QP */
2343 nesqp->cm_node = (void *)cm_node;
2344
2345 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu\n",
2346 nesqp->hwqp.qp_id, cm_node, jiffies);
2347 atomic_inc(&cm_accepts);
2348
2349 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2350 atomic_read(&nesvnic->netdev->refcnt));
2351
2352 /* allocate the ietf frame and space for private data */
2353 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2354 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2355 &nesqp->ietf_frame_pbase);
2356
2357 if (!nesqp->ietf_frame) {
2358 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
2359 return -ENOMEM;
2360 }
2361
2362
2363 /* setup the MPA frame */
2364 nesqp->private_data_len = conn_param->private_data_len;
2365 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2366
2367 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2368 conn_param->private_data_len);
2369
2370 nesqp->ietf_frame->priv_data_len = cpu_to_be16(conn_param->private_data_len);
2371 nesqp->ietf_frame->rev = mpa_version;
2372 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2373
2374 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2375 wqe = &nesqp->hwqp.sq_vbase[0];
2376
2377 if (cm_id->remote_addr.sin_addr.s_addr != cm_id->local_addr.sin_addr.s_addr) {
2378 u64temp = (unsigned long)nesqp;
2379 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2380 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2381 u64temp);
2382 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2383 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING | NES_IWARP_SQ_WQE_WRPDU);
2384 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2385 cpu_to_le32(conn_param->private_data_len + sizeof(struct ietf_mpa_frame));
2386 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
2387 cpu_to_le32((u32)nesqp->ietf_frame_pbase);
2388 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
2389 cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
2390 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2391 cpu_to_le32(conn_param->private_data_len + sizeof(struct ietf_mpa_frame));
2392 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2393
2394 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2395 NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | NES_QPCONTEXT_ORDIRD_WRPDU);
2396 } else {
2397 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2398 NES_QPCONTEXT_ORDIRD_WRPDU | NES_QPCONTEXT_ORDIRD_ALSMM));
2399 }
2400 nesqp->skip_lsmm = 1;
2401
2402
2403 /* Cache the cm_id in the qp */
2404 nesqp->cm_id = cm_id;
2405 cm_node->cm_id = cm_id;
2406
2407 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2408 cm_id->provider_data = nesqp;
2409 nesqp->active_conn = 0;
2410
2411 nes_cm_init_tsa_conn(nesqp, cm_node);
2412
2413 nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2414 nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2415 nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2416
2417 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2418 (u32)PCI_FUNC(nesdev->pcidev->devfn) << NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2419
2420 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
2421 nes_arp_table(nesdev, le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2422 NES_ARP_RESOLVE) << 16);
2423
2424 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2425 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2426
2427 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2428
2429 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2430 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2431 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2432
2433 memset(&nes_quad, 0, sizeof(nes_quad));
2434 nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2435 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2436 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2437 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2438
2439 /* Produce hash key */
2440 crc_value = get_crc_value(&nes_quad);
2441 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2442 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2443 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2444
2445 nesqp->hte_index &= adapter->hte_index_mask;
2446 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2447
2448 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2449
2450 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = 0x%08X:0x%04X,"
2451 " rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + private data length=%zu.\n",
2452 nesqp->hwqp.qp_id,
2453 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2454 ntohs(cm_id->remote_addr.sin_port),
2455 ntohl(cm_id->local_addr.sin_addr.s_addr),
2456 ntohs(cm_id->local_addr.sin_port),
2457 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2458 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2459 conn_param->private_data_len+sizeof(struct ietf_mpa_frame));
2460
2461 attr.qp_state = IB_QPS_RTS;
2462 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2463
2464 /* notify OF layer that accept event was successfull */
2465 cm_id->add_ref(cm_id);
2466
2467 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2468 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2469 cm_event.provider_data = (void *)nesqp;
2470 cm_event.local_addr = cm_id->local_addr;
2471 cm_event.remote_addr = cm_id->remote_addr;
2472 cm_event.private_data = NULL;
2473 cm_event.private_data_len = 0;
2474 ret = cm_id->event_handler(cm_id, &cm_event);
2475 if (cm_node->loopbackpartner) {
2476 cm_node->loopbackpartner->mpa_frame_size = nesqp->private_data_len;
2477 /* copy entire MPA frame to our cm_node's frame */
2478 memcpy(cm_node->loopbackpartner->mpa_frame_buf, nesqp->ietf_frame->priv_data,
2479 nesqp->private_data_len);
2480 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2481 }
2482 if (ret)
2483 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
2484 __FUNCTION__, __LINE__, ret);
2485
2486 return 0;
2487 }
2488
2489
2490 /**
2491 * nes_reject
2492 */
2493 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2494 {
2495 struct nes_cm_node *cm_node;
2496 struct nes_cm_core *cm_core;
2497
2498 atomic_inc(&cm_rejects);
2499 cm_node = (struct nes_cm_node *) cm_id->provider_data;
2500 cm_core = cm_node->cm_core;
2501 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2502
2503 strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
2504 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2505
2506 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2507 cm_node->mpa_frame.rev = mpa_version;
2508 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2509
2510 cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2511
2512 return 0;
2513 }
2514
2515
2516 /**
2517 * nes_connect
2518 * setup and launch cm connect node
2519 */
2520 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2521 {
2522 struct ib_qp *ibqp;
2523 struct nes_qp *nesqp;
2524 struct nes_vnic *nesvnic;
2525 struct nes_device *nesdev;
2526 struct nes_cm_node *cm_node;
2527 struct nes_cm_info cm_info;
2528
2529 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2530 if (!ibqp)
2531 return -EINVAL;
2532 nesqp = to_nesqp(ibqp);
2533 if (!nesqp)
2534 return -EINVAL;
2535 nesvnic = to_nesvnic(nesqp->ibqp.device);
2536 if (!nesvnic)
2537 return -EINVAL;
2538 nesdev = nesvnic->nesdev;
2539 if (!nesdev)
2540 return -EINVAL;
2541
2542 atomic_inc(&cm_connects);
2543
2544 nesqp->ietf_frame = kzalloc(sizeof(struct ietf_mpa_frame) +
2545 conn_param->private_data_len, GFP_KERNEL);
2546 if (!nesqp->ietf_frame)
2547 return -ENOMEM;
2548
2549 /* set qp as having an active connection */
2550 nesqp->active_conn = 1;
2551
2552 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = 0x%08X:0x%04X.\n",
2553 nesqp->hwqp.qp_id,
2554 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2555 ntohs(cm_id->remote_addr.sin_port),
2556 ntohl(cm_id->local_addr.sin_addr.s_addr),
2557 ntohs(cm_id->local_addr.sin_port));
2558
2559 /* cache the cm_id in the qp */
2560 nesqp->cm_id = cm_id;
2561
2562 cm_id->provider_data = nesqp;
2563
2564 /* copy the private data */
2565 if (conn_param->private_data_len) {
2566 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2567 conn_param->private_data_len);
2568 }
2569
2570 nesqp->private_data_len = conn_param->private_data_len;
2571 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2572 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
2573 nes_debug(NES_DBG_CM, "mpa private data len =%u\n", conn_param->private_data_len);
2574
2575 strcpy(&nesqp->ietf_frame->key[0], IEFT_MPA_KEY_REQ);
2576 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2577 nesqp->ietf_frame->rev = IETF_MPA_VERSION;
2578 nesqp->ietf_frame->priv_data_len = htons(conn_param->private_data_len);
2579
2580 if (cm_id->local_addr.sin_addr.s_addr != cm_id->remote_addr.sin_addr.s_addr)
2581 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2582 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2583
2584 /* set up the connection params for the node */
2585 cm_info.loc_addr = (cm_id->local_addr.sin_addr.s_addr);
2586 cm_info.loc_port = (cm_id->local_addr.sin_port);
2587 cm_info.rem_addr = (cm_id->remote_addr.sin_addr.s_addr);
2588 cm_info.rem_port = (cm_id->remote_addr.sin_port);
2589 cm_info.cm_id = cm_id;
2590 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2591
2592 cm_id->add_ref(cm_id);
2593 nes_add_ref(&nesqp->ibqp);
2594
2595 /* create a connect CM node connection */
2596 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic, nesqp->ietf_frame, &cm_info);
2597 if (!cm_node) {
2598 if (cm_id->local_addr.sin_addr.s_addr != cm_id->remote_addr.sin_addr.s_addr)
2599 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2600 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
2601 nes_rem_ref(&nesqp->ibqp);
2602 kfree(nesqp->ietf_frame);
2603 nesqp->ietf_frame = NULL;
2604 cm_id->rem_ref(cm_id);
2605 return -ENOMEM;
2606 }
2607
2608 cm_node->apbvt_set = 1;
2609 nesqp->cm_node = cm_node;
2610
2611 return 0;
2612 }
2613
2614
2615 /**
2616 * nes_create_listen
2617 */
2618 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
2619 {
2620 struct nes_vnic *nesvnic;
2621 struct nes_cm_listener *cm_node;
2622 struct nes_cm_info cm_info;
2623 struct nes_adapter *adapter;
2624 int err;
2625
2626
2627 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
2628 cm_id, ntohs(cm_id->local_addr.sin_port));
2629
2630 nesvnic = to_nesvnic(cm_id->device);
2631 if (!nesvnic)
2632 return -EINVAL;
2633 adapter = nesvnic->nesdev->nesadapter;
2634 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2635 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2636
2637 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
2638 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
2639
2640 /* setup listen params in our api call struct */
2641 cm_info.loc_addr = nesvnic->local_ipaddr;
2642 cm_info.loc_port = cm_id->local_addr.sin_port;
2643 cm_info.backlog = backlog;
2644 cm_info.cm_id = cm_id;
2645
2646 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2647
2648
2649 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
2650 if (!cm_node) {
2651 printk("%s[%u] Error returned from listen API call\n",
2652 __FUNCTION__, __LINE__);
2653 return -ENOMEM;
2654 }
2655
2656 cm_id->provider_data = cm_node;
2657
2658 if (!cm_node->reused_node) {
2659 err = nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2660 PCI_FUNC(nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2661 if (err) {
2662 printk("nes_manage_apbvt call returned %d.\n", err);
2663 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
2664 return err;
2665 }
2666 cm_listens_created++;
2667 }
2668
2669 cm_id->add_ref(cm_id);
2670 cm_id->provider_data = (void *)cm_node;
2671
2672
2673 return 0;
2674 }
2675
2676
2677 /**
2678 * nes_destroy_listen
2679 */
2680 int nes_destroy_listen(struct iw_cm_id *cm_id)
2681 {
2682 if (cm_id->provider_data)
2683 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
2684 else
2685 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
2686
2687 cm_id->rem_ref(cm_id);
2688
2689 return 0;
2690 }
2691
2692
2693 /**
2694 * nes_cm_recv
2695 */
2696 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
2697 {
2698 cm_packets_received++;
2699 if ((g_cm_core) && (g_cm_core->api)) {
2700 g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
2701 } else {
2702 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
2703 " cm is not setup properly.\n");
2704 }
2705
2706 return 0;
2707 }
2708
2709
2710 /**
2711 * nes_cm_start
2712 * Start and init a cm core module
2713 */
2714 int nes_cm_start(void)
2715 {
2716 nes_debug(NES_DBG_CM, "\n");
2717 /* create the primary CM core, pass this handle to subsequent core inits */
2718 g_cm_core = nes_cm_alloc_core();
2719 if (g_cm_core) {
2720 return 0;
2721 } else {
2722 return -ENOMEM;
2723 }
2724 }
2725
2726
2727 /**
2728 * nes_cm_stop
2729 * stop and dealloc all cm core instances
2730 */
2731 int nes_cm_stop(void)
2732 {
2733 g_cm_core->api->destroy_cm_core(g_cm_core);
2734 return 0;
2735 }
2736
2737
2738 /**
2739 * cm_event_connected
2740 * handle a connected event, setup QPs and HW
2741 */
2742 void cm_event_connected(struct nes_cm_event *event)
2743 {
2744 u64 u64temp;
2745 struct nes_qp *nesqp;
2746 struct nes_vnic *nesvnic;
2747 struct nes_device *nesdev;
2748 struct nes_cm_node *cm_node;
2749 struct nes_adapter *nesadapter;
2750 struct ib_qp_attr attr;
2751 struct iw_cm_id *cm_id;
2752 struct iw_cm_event cm_event;
2753 struct nes_hw_qp_wqe *wqe;
2754 struct nes_v4_quad nes_quad;
2755 u32 crc_value;
2756 int ret;
2757
2758 /* get all our handles */
2759 cm_node = event->cm_node;
2760 cm_id = cm_node->cm_id;
2761 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
2762 nesqp = (struct nes_qp *)cm_id->provider_data;
2763 nesvnic = to_nesvnic(nesqp->ibqp.device);
2764 nesdev = nesvnic->nesdev;
2765 nesadapter = nesdev->nesadapter;
2766
2767 if (nesqp->destroyed) {
2768 return;
2769 }
2770 atomic_inc(&cm_connecteds);
2771 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
2772 " local port 0x%04X. jiffies = %lu.\n",
2773 nesqp->hwqp.qp_id,
2774 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2775 ntohs(cm_id->remote_addr.sin_port),
2776 ntohs(cm_id->local_addr.sin_port),
2777 jiffies);
2778
2779 nes_cm_init_tsa_conn(nesqp, cm_node);
2780
2781 /* set the QP tsa context */
2782 nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2783 nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2784 nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2785
2786 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2787 (u32)PCI_FUNC(nesdev->pcidev->devfn) << NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2788 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
2789 nes_arp_table(nesdev, le32_to_cpu(nesqp->nesqp_context->ip0),
2790 NULL, NES_ARP_RESOLVE) << 16);
2791 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2792 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2793 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2794 nesqp->nesqp_context->ird_ord_sizes |=
2795 cpu_to_le32((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
2796
2797 /* Adjust tail for not having a LSMM */
2798 nesqp->hwqp.sq_tail = 1;
2799
2800 #if defined(NES_SEND_FIRST_WRITE)
2801 if (cm_node->send_write0) {
2802 nes_debug(NES_DBG_CM, "Sending first write.\n");
2803 wqe = &nesqp->hwqp.sq_vbase[0];
2804 u64temp = (unsigned long)nesqp;
2805 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2806 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2807 u64temp);
2808 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
2809 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
2810 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
2811 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
2812 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
2813 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2814
2815 /* use the reserved spot on the WQ for the extra first WQE */
2816 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2817 NES_QPCONTEXT_ORDIRD_WRPDU | NES_QPCONTEXT_ORDIRD_ALSMM));
2818 nesqp->skip_lsmm = 1;
2819 nesqp->hwqp.sq_tail = 0;
2820 nes_write32(nesdev->regs + NES_WQE_ALLOC,
2821 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
2822 }
2823 #endif
2824
2825 memset(&nes_quad, 0, sizeof(nes_quad));
2826
2827 nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2828 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2829 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2830 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2831
2832 /* Produce hash key */
2833 crc_value = get_crc_value(&nes_quad);
2834 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2835 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
2836 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
2837
2838 nesqp->hte_index &= nesadapter->hte_index_mask;
2839 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2840
2841 nesqp->ietf_frame = &cm_node->mpa_frame;
2842 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
2843 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2844
2845 /* modify QP state to rts */
2846 attr.qp_state = IB_QPS_RTS;
2847 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2848
2849 /* notify OF layer we successfully created the requested connection */
2850 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
2851 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2852 cm_event.provider_data = cm_id->provider_data;
2853 cm_event.local_addr.sin_family = AF_INET;
2854 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
2855 cm_event.remote_addr = cm_id->remote_addr;
2856
2857 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
2858 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
2859
2860 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
2861 ret = cm_id->event_handler(cm_id, &cm_event);
2862 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2863
2864 if (ret)
2865 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
2866 __FUNCTION__, __LINE__, ret);
2867 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = %lu\n",
2868 nesqp->hwqp.qp_id, jiffies );
2869
2870 nes_rem_ref(&nesqp->ibqp);
2871
2872 return;
2873 }
2874
2875
2876 /**
2877 * cm_event_connect_error
2878 */
2879 void cm_event_connect_error(struct nes_cm_event *event)
2880 {
2881 struct nes_qp *nesqp;
2882 struct iw_cm_id *cm_id;
2883 struct iw_cm_event cm_event;
2884 /* struct nes_cm_info cm_info; */
2885 int ret;
2886
2887 if (!event->cm_node)
2888 return;
2889
2890 cm_id = event->cm_node->cm_id;
2891 if (!cm_id) {
2892 return;
2893 }
2894
2895 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
2896 nesqp = cm_id->provider_data;
2897
2898 if (!nesqp) {
2899 return;
2900 }
2901
2902 /* notify OF layer about this connection error event */
2903 /* cm_id->rem_ref(cm_id); */
2904 nesqp->cm_id = NULL;
2905 cm_id->provider_data = NULL;
2906 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
2907 cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
2908 cm_event.provider_data = cm_id->provider_data;
2909 cm_event.local_addr = cm_id->local_addr;
2910 cm_event.remote_addr = cm_id->remote_addr;
2911 cm_event.private_data = NULL;
2912 cm_event.private_data_len = 0;
2913
2914 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remove_addr=%08x\n",
2915 cm_event.local_addr.sin_addr.s_addr, cm_event.remote_addr.sin_addr.s_addr);
2916
2917 ret = cm_id->event_handler(cm_id, &cm_event);
2918 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2919 if (ret)
2920 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
2921 __FUNCTION__, __LINE__, ret);
2922 nes_rem_ref(&nesqp->ibqp);
2923 cm_id->rem_ref(cm_id);
2924
2925 return;
2926 }
2927
2928
2929 /**
2930 * cm_event_reset
2931 */
2932 void cm_event_reset(struct nes_cm_event *event)
2933 {
2934 struct nes_qp *nesqp;
2935 struct iw_cm_id *cm_id;
2936 struct iw_cm_event cm_event;
2937 /* struct nes_cm_info cm_info; */
2938 int ret;
2939
2940 if (!event->cm_node)
2941 return;
2942
2943 if (!event->cm_node->cm_id)
2944 return;
2945
2946 cm_id = event->cm_node->cm_id;
2947
2948 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
2949 nesqp = cm_id->provider_data;
2950
2951 nesqp->cm_id = NULL;
2952 /* cm_id->provider_data = NULL; */
2953 cm_event.event = IW_CM_EVENT_DISCONNECT;
2954 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2955 cm_event.provider_data = cm_id->provider_data;
2956 cm_event.local_addr = cm_id->local_addr;
2957 cm_event.remote_addr = cm_id->remote_addr;
2958 cm_event.private_data = NULL;
2959 cm_event.private_data_len = 0;
2960
2961 ret = cm_id->event_handler(cm_id, &cm_event);
2962 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2963
2964
2965 /* notify OF layer about this connection error event */
2966 cm_id->rem_ref(cm_id);
2967
2968 return;
2969 }
2970
2971
2972 /**
2973 * cm_event_mpa_req
2974 */
2975 void cm_event_mpa_req(struct nes_cm_event *event)
2976 {
2977 struct iw_cm_id *cm_id;
2978 struct iw_cm_event cm_event;
2979 int ret;
2980 struct nes_cm_node *cm_node;
2981
2982 cm_node = event->cm_node;
2983 if (!cm_node)
2984 return;
2985 cm_id = cm_node->cm_id;
2986
2987 atomic_inc(&cm_connect_reqs);
2988 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
2989 cm_node, cm_id, jiffies);
2990
2991 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
2992 cm_event.status = IW_CM_EVENT_STATUS_OK;
2993 cm_event.provider_data = (void *)cm_node;
2994
2995 cm_event.local_addr.sin_family = AF_INET;
2996 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
2997 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
2998
2999 cm_event.remote_addr.sin_family = AF_INET;
3000 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3001 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3002
3003 cm_event.private_data = cm_node->mpa_frame_buf;
3004 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3005
3006 ret = cm_id->event_handler(cm_id, &cm_event);
3007 if (ret)
3008 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
3009 __FUNCTION__, __LINE__, ret);
3010
3011 return;
3012 }
3013
3014
3015 static void nes_cm_event_handler(struct work_struct *);
3016
3017 /**
3018 * nes_cm_post_event
3019 * post an event to the cm event handler
3020 */
3021 int nes_cm_post_event(struct nes_cm_event *event)
3022 {
3023 atomic_inc(&event->cm_node->cm_core->events_posted);
3024 add_ref_cm_node(event->cm_node);
3025 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3026 INIT_WORK(&event->event_work, nes_cm_event_handler);
3027 nes_debug(NES_DBG_CM, "queue_work, event=%p\n", event);
3028
3029 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3030
3031 nes_debug(NES_DBG_CM, "Exit\n");
3032 return 0;
3033 }
3034
3035
3036 /**
3037 * nes_cm_event_handler
3038 * worker function to handle cm events
3039 * will free instance of nes_cm_event
3040 */
3041 static void nes_cm_event_handler(struct work_struct *work)
3042 {
3043 struct nes_cm_event *event = container_of(work, struct nes_cm_event, event_work);
3044 struct nes_cm_core *cm_core;
3045
3046 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core)) {
3047 return;
3048 }
3049 cm_core = event->cm_node->cm_core;
3050 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3051 event, event->type, atomic_read(&cm_core->events_posted));
3052
3053 switch (event->type) {
3054 case NES_CM_EVENT_MPA_REQ:
3055 cm_event_mpa_req(event);
3056 nes_debug(NES_DBG_CM, "CM Event: MPA REQUEST\n");
3057 break;
3058 case NES_CM_EVENT_RESET:
3059 nes_debug(NES_DBG_CM, "CM Event: RESET\n");
3060 cm_event_reset(event);
3061 break;
3062 case NES_CM_EVENT_CONNECTED:
3063 if ((!event->cm_node->cm_id) ||
3064 (event->cm_node->state != NES_CM_STATE_TSA)) {
3065 break;
3066 }
3067 cm_event_connected(event);
3068 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3069 break;
3070 case NES_CM_EVENT_ABORTED:
3071 if ((!event->cm_node->cm_id) || (event->cm_node->state == NES_CM_STATE_TSA)) {
3072 break;
3073 }
3074 cm_event_connect_error(event);
3075 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3076 break;
3077 case NES_CM_EVENT_DROPPED_PKT:
3078 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3079 break;
3080 default:
3081 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3082 break;
3083 }
3084
3085 atomic_dec(&cm_core->events_posted);
3086 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3087 rem_ref_cm_node(cm_core, event->cm_node);
3088 kfree(event);
3089
3090 return;
3091 }
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