projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:


456da13b68de1972ddc81795901012bf2e684042
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / hw / nes / nes_cm.c
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/if_vlan.h>
44 #include <linux/notifier.h>
45 #include <linux/net.h>
46 #include <linux/types.h>
47 #include <linux/timer.h>
48 #include <linux/time.h>
49 #include <linux/delay.h>
50 #include <linux/etherdevice.h>
51 #include <linux/netdevice.h>
52 #include <linux/random.h>
53 #include <linux/list.h>
54 #include <linux/threads.h>
55
56 #include <net/neighbour.h>
57 #include <net/route.h>
58 #include <net/ip_fib.h>
59
60 #include "nes.h"
61
62 u32 cm_packets_sent;
63 u32 cm_packets_bounced;
64 u32 cm_packets_dropped;
65 u32 cm_packets_retrans;
66 u32 cm_packets_created;
67 u32 cm_packets_received;
68 u32 cm_listens_created;
69 u32 cm_listens_destroyed;
70 u32 cm_backlog_drops;
71 atomic_t cm_loopbacks;
72 atomic_t cm_nodes_created;
73 atomic_t cm_nodes_destroyed;
74 atomic_t cm_accel_dropped_pkts;
75 atomic_t cm_resets_recvd;
76
77 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
78 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
79 struct nes_vnic *, struct nes_cm_info *);
80 static int add_ref_cm_node(struct nes_cm_node *);
81 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
82 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
83 static struct sk_buff *form_cm_frame(struct sk_buff *, struct nes_cm_node *,
84 void *, u32, void *, u32, u8);
85 static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node);
86
87 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
88 struct nes_vnic *,
89 struct ietf_mpa_frame *,
90 struct nes_cm_info *);
91 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
92 struct nes_cm_node *);
93 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
94 struct nes_cm_node *);
95 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
96 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
97 struct sk_buff *);
98 static int mini_cm_dealloc_core(struct nes_cm_core *);
99 static int mini_cm_get(struct nes_cm_core *);
100 static int mini_cm_set(struct nes_cm_core *, u32, u32);
101 static int nes_cm_disconn_true(struct nes_qp *);
102 static int nes_cm_post_event(struct nes_cm_event *event);
103 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
104 static void nes_disconnect_worker(struct work_struct *work);
105 static int send_ack(struct nes_cm_node *cm_node);
106 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
107
108 /* External CM API Interface */
109 /* instance of function pointers for client API */
110 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
111 static struct nes_cm_ops nes_cm_api = {
112 mini_cm_accelerated,
113 mini_cm_listen,
114 mini_cm_del_listen,
115 mini_cm_connect,
116 mini_cm_close,
117 mini_cm_accept,
118 mini_cm_reject,
119 mini_cm_recv_pkt,
120 mini_cm_dealloc_core,
121 mini_cm_get,
122 mini_cm_set
123 };
124
125 static struct nes_cm_core *g_cm_core;
126
127 atomic_t cm_connects;
128 atomic_t cm_accepts;
129 atomic_t cm_disconnects;
130 atomic_t cm_closes;
131 atomic_t cm_connecteds;
132 atomic_t cm_connect_reqs;
133 atomic_t cm_rejects;
134
135
136 /**
137 * create_event
138 */
139 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
140 enum nes_cm_event_type type)
141 {
142 struct nes_cm_event *event;
143
144 if (!cm_node->cm_id)
145 return NULL;
146
147 /* allocate an empty event */
148 event = kzalloc(sizeof(*event), GFP_ATOMIC);
149
150 if (!event)
151 return NULL;
152
153 event->type = type;
154 event->cm_node = cm_node;
155 event->cm_info.rem_addr = cm_node->rem_addr;
156 event->cm_info.loc_addr = cm_node->loc_addr;
157 event->cm_info.rem_port = cm_node->rem_port;
158 event->cm_info.loc_port = cm_node->loc_port;
159 event->cm_info.cm_id = cm_node->cm_id;
160
161 nes_debug(NES_DBG_CM, "Created event=%p, type=%u, dst_addr=%08x[%x],"
162 " src_addr=%08x[%x]\n",
163 event, type,
164 event->cm_info.loc_addr, event->cm_info.loc_port,
165 event->cm_info.rem_addr, event->cm_info.rem_port);
166
167 nes_cm_post_event(event);
168 return event;
169 }
170
171
172 /**
173 * send_mpa_request
174 */
175 static int send_mpa_request(struct nes_cm_node *cm_node)
176 {
177 struct sk_buff *skb;
178 int ret;
179
180 skb = get_free_pkt(cm_node);
181 if (!skb) {
182 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
183 return -1;
184 }
185
186 /* send an MPA Request frame */
187 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
188 cm_node->mpa_frame_size, SET_ACK);
189
190 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
191 if (ret < 0) {
192 return ret;
193 }
194
195 return 0;
196 }
197
198
199 /**
200 * recv_mpa - process a received TCP pkt, we are expecting an
201 * IETF MPA frame
202 */
203 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len)
204 {
205 struct ietf_mpa_frame *mpa_frame;
206
207 /* assume req frame is in tcp data payload */
208 if (len < sizeof(struct ietf_mpa_frame)) {
209 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
210 return -1;
211 }
212
213 mpa_frame = (struct ietf_mpa_frame *)buffer;
214 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
215
216 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
217 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
218 " complete (%x + %x != %x)\n",
219 cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len);
220 return -1;
221 }
222
223 /* copy entire MPA frame to our cm_node's frame */
224 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
225 cm_node->mpa_frame_size);
226
227 return 0;
228 }
229
230
231 /**
232 * handle_exception_pkt - process an exception packet.
233 * We have been in a TSA state, and we have now received SW
234 * TCP/IP traffic should be a FIN request or IP pkt with options
235 */
236 static int handle_exception_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb)
237 {
238 int ret = 0;
239 struct tcphdr *tcph = tcp_hdr(skb);
240
241 /* first check to see if this a FIN pkt */
242 if (tcph->fin) {
243 /* we need to ACK the FIN request */
244 send_ack(cm_node);
245
246 /* check which side we are (client/server) and set next state accordingly */
247 if (cm_node->tcp_cntxt.client)
248 cm_node->state = NES_CM_STATE_CLOSING;
249 else {
250 /* we are the server side */
251 cm_node->state = NES_CM_STATE_CLOSE_WAIT;
252 /* since this is a self contained CM we don't wait for */
253 /* an APP to close us, just send final FIN immediately */
254 ret = send_fin(cm_node, NULL);
255 cm_node->state = NES_CM_STATE_LAST_ACK;
256 }
257 } else {
258 ret = -EINVAL;
259 }
260
261 return ret;
262 }
263
264
265 /**
266 * form_cm_frame - get a free packet and build empty frame Use
267 * node info to build.
268 */
269 static struct sk_buff *form_cm_frame(struct sk_buff *skb, struct nes_cm_node *cm_node,
270 void *options, u32 optionsize, void *data,
271 u32 datasize, u8 flags)
272 {
273 struct tcphdr *tcph;
274 struct iphdr *iph;
275 struct ethhdr *ethh;
276 u8 *buf;
277 u16 packetsize = sizeof(*iph);
278
279 packetsize += sizeof(*tcph);
280 packetsize += optionsize + datasize;
281
282 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
283
284 skb->len = 0;
285 buf = skb_put(skb, packetsize + ETH_HLEN);
286
287 ethh = (struct ethhdr *) buf;
288 buf += ETH_HLEN;
289
290 iph = (struct iphdr *)buf;
291 buf += sizeof(*iph);
292 tcph = (struct tcphdr *)buf;
293 skb_reset_mac_header(skb);
294 skb_set_network_header(skb, ETH_HLEN);
295 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
296 buf += sizeof(*tcph);
297
298 skb->ip_summed = CHECKSUM_PARTIAL;
299 skb->protocol = htons(0x800);
300 skb->data_len = 0;
301 skb->mac_len = ETH_HLEN;
302
303 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
304 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
305 ethh->h_proto = htons(0x0800);
306
307 iph->version = IPVERSION;
308 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
309 iph->tos = 0;
310 iph->tot_len = htons(packetsize);
311 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
312
313 iph->frag_off = htons(0x4000);
314 iph->ttl = 0x40;
315 iph->protocol = 0x06; /* IPPROTO_TCP */
316
317 iph->saddr = htonl(cm_node->loc_addr);
318 iph->daddr = htonl(cm_node->rem_addr);
319
320 tcph->source = htons(cm_node->loc_port);
321 tcph->dest = htons(cm_node->rem_port);
322 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
323
324 if (flags & SET_ACK) {
325 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
326 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
327 tcph->ack = 1;
328 } else
329 tcph->ack_seq = 0;
330
331 if (flags & SET_SYN) {
332 cm_node->tcp_cntxt.loc_seq_num++;
333 tcph->syn = 1;
334 } else
335 cm_node->tcp_cntxt.loc_seq_num += datasize; /* data (no headers) */
336
337 if (flags & SET_FIN)
338 tcph->fin = 1;
339
340 if (flags & SET_RST)
341 tcph->rst = 1;
342
343 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
344 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
345 tcph->urg_ptr = 0;
346 if (optionsize)
347 memcpy(buf, options, optionsize);
348 buf += optionsize;
349 if (datasize)
350 memcpy(buf, data, datasize);
351
352 skb_shinfo(skb)->nr_frags = 0;
353 cm_packets_created++;
354
355 return skb;
356 }
357
358
359 /**
360 * print_core - dump a cm core
361 */
362 static void print_core(struct nes_cm_core *core)
363 {
364 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
365 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
366 if (!core)
367 return;
368 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
369 nes_debug(NES_DBG_CM, "Session ID : %u \n", atomic_read(&core->session_id));
370
371 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
372
373 nes_debug(NES_DBG_CM, "Tx Free cnt : %u \n", skb_queue_len(&core->tx_free_list));
374 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
375 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
376
377 nes_debug(NES_DBG_CM, "core : %p \n", core);
378
379 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
380 }
381
382
383 /**
384 * schedule_nes_timer
385 * note - cm_node needs to be protected before calling this. Encase in:
386 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
387 */
388 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
389 enum nes_timer_type type, int send_retrans,
390 int close_when_complete)
391 {
392 unsigned long flags;
393 struct nes_cm_core *cm_core;
394 struct nes_timer_entry *new_send;
395 int ret = 0;
396 u32 was_timer_set;
397
398 if (!cm_node)
399 return -EINVAL;
400 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
401 if (!new_send)
402 return -1;
403
404 /* new_send->timetosend = currenttime */
405 new_send->retrycount = NES_DEFAULT_RETRYS;
406 new_send->retranscount = NES_DEFAULT_RETRANS;
407 new_send->skb = skb;
408 new_send->timetosend = jiffies;
409 new_send->type = type;
410 new_send->netdev = cm_node->netdev;
411 new_send->send_retrans = send_retrans;
412 new_send->close_when_complete = close_when_complete;
413
414 if (type == NES_TIMER_TYPE_CLOSE) {
415 new_send->timetosend += (HZ/2); /* TODO: decide on the correct value here */
416 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
417 list_add_tail(&new_send->list, &cm_node->recv_list);
418 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
419 }
420
421 if (type == NES_TIMER_TYPE_SEND) {
422 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
423 atomic_inc(&new_send->skb->users);
424
425 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
426 if (ret != NETDEV_TX_OK) {
427 nes_debug(NES_DBG_CM, "Error sending packet %p (jiffies = %lu)\n",
428 new_send, jiffies);
429 atomic_dec(&new_send->skb->users);
430 new_send->timetosend = jiffies;
431 } else {
432 cm_packets_sent++;
433 if (!send_retrans) {
434 if (close_when_complete)
435 rem_ref_cm_node(cm_node->cm_core, cm_node);
436 dev_kfree_skb_any(new_send->skb);
437 kfree(new_send);
438 return ret;
439 }
440 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
441 }
442 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
443 list_add_tail(&new_send->list, &cm_node->retrans_list);
444 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
445 }
446 if (type == NES_TIMER_TYPE_RECV) {
447 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
448 new_send->timetosend = jiffies;
449 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
450 list_add_tail(&new_send->list, &cm_node->recv_list);
451 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
452 }
453 cm_core = cm_node->cm_core;
454
455 was_timer_set = timer_pending(&cm_core->tcp_timer);
456
457 if (!was_timer_set) {
458 cm_core->tcp_timer.expires = new_send->timetosend;
459 add_timer(&cm_core->tcp_timer);
460 }
461
462 return ret;
463 }
464
465
466 /**
467 * nes_cm_timer_tick
468 */
469 static void nes_cm_timer_tick(unsigned long pass)
470 {
471 unsigned long flags, qplockflags;
472 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
473 struct iw_cm_id *cm_id;
474 struct nes_cm_node *cm_node;
475 struct nes_timer_entry *send_entry, *recv_entry;
476 struct list_head *list_core, *list_core_temp;
477 struct list_head *list_node, *list_node_temp;
478 struct nes_cm_core *cm_core = g_cm_core;
479 struct nes_qp *nesqp;
480 struct sk_buff *skb;
481 u32 settimer = 0;
482 int ret = NETDEV_TX_OK;
483 int node_done;
484
485 spin_lock_irqsave(&cm_core->ht_lock, flags);
486
487 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
488 cm_node = container_of(list_node, struct nes_cm_node, list);
489 add_ref_cm_node(cm_node);
490 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
491 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
492 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
493 recv_entry = container_of(list_core, struct nes_timer_entry, list);
494 if ((time_after(recv_entry->timetosend, jiffies)) &&
495 (recv_entry->type == NES_TIMER_TYPE_CLOSE)) {
496 if (nexttimeout > recv_entry->timetosend || !settimer) {
497 nexttimeout = recv_entry->timetosend;
498 settimer = 1;
499 }
500 continue;
501 }
502 list_del(&recv_entry->list);
503 cm_id = cm_node->cm_id;
504 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
505 if (recv_entry->type == NES_TIMER_TYPE_CLOSE) {
506 nesqp = (struct nes_qp *)recv_entry->skb;
507 spin_lock_irqsave(&nesqp->lock, qplockflags);
508 if (nesqp->cm_id) {
509 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, refcount = %d: "
510 "****** HIT A NES_TIMER_TYPE_CLOSE"
511 " with something to do!!! ******\n",
512 nesqp->hwqp.qp_id, cm_id,
513 atomic_read(&nesqp->refcount));
514 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
515 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
516 nesqp->ibqp_state = IB_QPS_ERR;
517 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
518 nes_cm_disconn(nesqp);
519 } else {
520 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
521 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, refcount = %d:"
522 " ****** HIT A NES_TIMER_TYPE_CLOSE"
523 " with nothing to do!!! ******\n",
524 nesqp->hwqp.qp_id, cm_id,
525 atomic_read(&nesqp->refcount));
526 nes_rem_ref(&nesqp->ibqp);
527 }
528 if (cm_id)
529 cm_id->rem_ref(cm_id);
530 }
531 kfree(recv_entry);
532 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
533 }
534 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
535
536 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
537 node_done = 0;
538 list_for_each_safe(list_core, list_node_temp, &cm_node->retrans_list) {
539 if (node_done) {
540 break;
541 }
542 send_entry = container_of(list_core, struct nes_timer_entry, list);
543 if (time_after(send_entry->timetosend, jiffies)) {
544 if (cm_node->state != NES_CM_STATE_TSA) {
545 if ((nexttimeout > send_entry->timetosend) || !settimer) {
546 nexttimeout = send_entry->timetosend;
547 settimer = 1;
548 }
549 node_done = 1;
550 continue;
551 } else {
552 list_del(&send_entry->list);
553 skb = send_entry->skb;
554 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
555 dev_kfree_skb_any(skb);
556 kfree(send_entry);
557 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
558 continue;
559 }
560 }
561 if (send_entry->type == NES_TIMER_NODE_CLEANUP) {
562 list_del(&send_entry->list);
563 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
564 kfree(send_entry);
565 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
566 continue;
567 }
568 if ((send_entry->seq_num < cm_node->tcp_cntxt.rem_ack_num) ||
569 (cm_node->state == NES_CM_STATE_TSA) ||
570 (cm_node->state == NES_CM_STATE_CLOSED)) {
571 skb = send_entry->skb;
572 list_del(&send_entry->list);
573 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
574 kfree(send_entry);
575 dev_kfree_skb_any(skb);
576 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
577 continue;
578 }
579
580 if (!send_entry->retranscount || !send_entry->retrycount) {
581 cm_packets_dropped++;
582 skb = send_entry->skb;
583 list_del(&send_entry->list);
584 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
585 dev_kfree_skb_any(skb);
586 kfree(send_entry);
587 if (cm_node->state == NES_CM_STATE_SYN_RCVD) {
588 /* this node never even generated an indication up to the cm */
589 rem_ref_cm_node(cm_core, cm_node);
590 } else {
591 cm_node->state = NES_CM_STATE_CLOSED;
592 create_event(cm_node, NES_CM_EVENT_ABORTED);
593 }
594 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
595 continue;
596 }
597 /* this seems like the correct place, but leave send entry unprotected */
598 // spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
599 atomic_inc(&send_entry->skb->users);
600 cm_packets_retrans++;
601 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p for node %p,"
602 " jiffies = %lu, time to send = %lu, retranscount = %u, "
603 "send_entry->seq_num = 0x%08X, cm_node->tcp_cntxt.rem_ack_num = 0x%08X\n",
604 send_entry, cm_node, jiffies, send_entry->timetosend, send_entry->retranscount,
605 send_entry->seq_num, cm_node->tcp_cntxt.rem_ack_num);
606
607 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
608 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
609 if (ret != NETDEV_TX_OK) {
610 cm_packets_bounced++;
611 atomic_dec(&send_entry->skb->users);
612 send_entry->retrycount--;
613 nexttimeout = jiffies + NES_SHORT_TIME;
614 settimer = 1;
615 node_done = 1;
616 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
617 continue;
618 } else {
619 cm_packets_sent++;
620 }
621 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
622 list_del(&send_entry->list);
623 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = %u, retry count = %u.\n",
624 send_entry->retranscount, send_entry->retrycount);
625 if (send_entry->send_retrans) {
626 send_entry->retranscount--;
627 send_entry->timetosend = jiffies + NES_RETRY_TIMEOUT;
628 if (nexttimeout > send_entry->timetosend || !settimer) {
629 nexttimeout = send_entry->timetosend;
630 settimer = 1;
631 }
632 list_add(&send_entry->list, &cm_node->retrans_list);
633 continue;
634 } else {
635 int close_when_complete;
636 skb = send_entry->skb;
637 close_when_complete = send_entry->close_when_complete;
638 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
639 if (close_when_complete) {
640 BUG_ON(atomic_read(&cm_node->ref_count) == 1);
641 rem_ref_cm_node(cm_core, cm_node);
642 }
643 dev_kfree_skb_any(skb);
644 kfree(send_entry);
645 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
646 continue;
647 }
648 }
649 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
650
651 rem_ref_cm_node(cm_core, cm_node);
652
653 spin_lock_irqsave(&cm_core->ht_lock, flags);
654 if (ret != NETDEV_TX_OK)
655 break;
656 }
657 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
658
659 if (settimer) {
660 if (!timer_pending(&cm_core->tcp_timer)) {
661 cm_core->tcp_timer.expires = nexttimeout;
662 add_timer(&cm_core->tcp_timer);
663 }
664 }
665 }
666
667
668 /**
669 * send_syn
670 */
671 static int send_syn(struct nes_cm_node *cm_node, u32 sendack)
672 {
673 int ret;
674 int flags = SET_SYN;
675 struct sk_buff *skb;
676 char optionsbuffer[sizeof(struct option_mss) +
677 sizeof(struct option_windowscale) +
678 sizeof(struct option_base) + 1];
679
680 int optionssize = 0;
681 /* Sending MSS option */
682 union all_known_options *options;
683
684 if (!cm_node)
685 return -EINVAL;
686
687 options = (union all_known_options *)&optionsbuffer[optionssize];
688 options->as_mss.optionnum = OPTION_NUMBER_MSS;
689 options->as_mss.length = sizeof(struct option_mss);
690 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
691 optionssize += sizeof(struct option_mss);
692
693 options = (union all_known_options *)&optionsbuffer[optionssize];
694 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
695 options->as_windowscale.length = sizeof(struct option_windowscale);
696 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
697 optionssize += sizeof(struct option_windowscale);
698
699 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)
700 ) {
701 options = (union all_known_options *)&optionsbuffer[optionssize];
702 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
703 options->as_base.length = sizeof(struct option_base);
704 optionssize += sizeof(struct option_base);
705 /* we need the size to be a multiple of 4 */
706 options = (union all_known_options *)&optionsbuffer[optionssize];
707 options->as_end = 1;
708 optionssize += 1;
709 options = (union all_known_options *)&optionsbuffer[optionssize];
710 options->as_end = 1;
711 optionssize += 1;
712 }
713
714 options = (union all_known_options *)&optionsbuffer[optionssize];
715 options->as_end = OPTION_NUMBER_END;
716 optionssize += 1;
717
718 skb = get_free_pkt(cm_node);
719 if (!skb) {
720 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
721 return -1;
722 }
723
724 if (sendack)
725 flags |= SET_ACK;
726
727 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
728 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
729
730 return ret;
731 }
732
733
734 /**
735 * send_reset
736 */
737 static int send_reset(struct nes_cm_node *cm_node)
738 {
739 int ret;
740 struct sk_buff *skb = get_free_pkt(cm_node);
741 int flags = SET_RST | SET_ACK;
742
743 if (!skb) {
744 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
745 return -1;
746 }
747
748 add_ref_cm_node(cm_node);
749 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
750 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
751
752 return ret;
753 }
754
755
756 /**
757 * send_ack
758 */
759 static int send_ack(struct nes_cm_node *cm_node)
760 {
761 int ret;
762 struct sk_buff *skb = get_free_pkt(cm_node);
763
764 if (!skb) {
765 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
766 return -1;
767 }
768
769 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
770 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
771
772 return ret;
773 }
774
775
776 /**
777 * send_fin
778 */
779 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
780 {
781 int ret;
782
783 /* if we didn't get a frame get one */
784 if (!skb)
785 skb = get_free_pkt(cm_node);
786
787 if (!skb) {
788 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
789 return -1;
790 }
791
792 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
793 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
794
795 return ret;
796 }
797
798
799 /**
800 * get_free_pkt
801 */
802 static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node)
803 {
804 struct sk_buff *skb, *new_skb;
805
806 /* check to see if we need to repopulate the free tx pkt queue */
807 if (skb_queue_len(&cm_node->cm_core->tx_free_list) < NES_CM_FREE_PKT_LO_WATERMARK) {
808 while (skb_queue_len(&cm_node->cm_core->tx_free_list) <
809 cm_node->cm_core->free_tx_pkt_max) {
810 /* replace the frame we took, we won't get it back */
811 new_skb = dev_alloc_skb(cm_node->cm_core->mtu);
812 BUG_ON(!new_skb);
813 /* add a replacement frame to the free tx list head */
814 skb_queue_head(&cm_node->cm_core->tx_free_list, new_skb);
815 }
816 }
817
818 skb = skb_dequeue(&cm_node->cm_core->tx_free_list);
819
820 return skb;
821 }
822
823
824 /**
825 * make_hashkey - generate hash key from node tuple
826 */
827 static inline int make_hashkey(u16 loc_port, nes_addr_t loc_addr, u16 rem_port,
828 nes_addr_t rem_addr)
829 {
830 u32 hashkey = 0;
831
832 hashkey = loc_addr + rem_addr + loc_port + rem_port;
833 hashkey = (hashkey % NES_CM_HASHTABLE_SIZE);
834
835 return hashkey;
836 }
837
838
839 /**
840 * find_node - find a cm node that matches the reference cm node
841 */
842 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
843 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
844 {
845 unsigned long flags;
846 u32 hashkey;
847 struct list_head *list_pos;
848 struct list_head *hte;
849 struct nes_cm_node *cm_node;
850
851 /* make a hash index key for this packet */
852 hashkey = make_hashkey(loc_port, loc_addr, rem_port, rem_addr);
853
854 /* get a handle on the hte */
855 hte = &cm_core->connected_nodes;
856
857 nes_debug(NES_DBG_CM, "Searching for an owner node:%x:%x from core %p->%p\n",
858 loc_addr, loc_port, cm_core, hte);
859
860 /* walk list and find cm_node associated with this session ID */
861 spin_lock_irqsave(&cm_core->ht_lock, flags);
862 list_for_each(list_pos, hte) {
863 cm_node = container_of(list_pos, struct nes_cm_node, list);
864 /* compare quad, return node handle if a match */
865 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
866 cm_node->loc_addr, cm_node->loc_port,
867 loc_addr, loc_port,
868 cm_node->rem_addr, cm_node->rem_port,
869 rem_addr, rem_port);
870 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
871 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
872 add_ref_cm_node(cm_node);
873 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
874 return cm_node;
875 }
876 }
877 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
878
879 /* no owner node */
880 return NULL;
881 }
882
883
884 /**
885 * find_listener - find a cm node listening on this addr-port pair
886 */
887 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
888 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
889 {
890 unsigned long flags;
891 struct list_head *listen_list;
892 struct nes_cm_listener *listen_node;
893
894 /* walk list and find cm_node associated with this session ID */
895 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
896 list_for_each(listen_list, &cm_core->listen_list.list) {
897 listen_node = container_of(listen_list, struct nes_cm_listener, list);
898 /* compare node pair, return node handle if a match */
899 if (((listen_node->loc_addr == dst_addr) ||
900 listen_node->loc_addr == 0x00000000) &&
901 (listen_node->loc_port == dst_port) &&
902 (listener_state & listen_node->listener_state)) {
903 atomic_inc(&listen_node->ref_count);
904 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
905 return listen_node;
906 }
907 }
908 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
909
910 nes_debug(NES_DBG_CM, "Unable to find listener- %x:%x\n",
911 dst_addr, dst_port);
912
913 /* no listener */
914 return NULL;
915 }
916
917
918 /**
919 * add_hte_node - add a cm node to the hash table
920 */
921 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
922 {
923 unsigned long flags;
924 u32 hashkey;
925 struct list_head *hte;
926
927 if (!cm_node || !cm_core)
928 return -EINVAL;
929
930 nes_debug(NES_DBG_CM, "Adding Node to Active Connection HT\n");
931
932 /* first, make an index into our hash table */
933 hashkey = make_hashkey(cm_node->loc_port, cm_node->loc_addr,
934 cm_node->rem_port, cm_node->rem_addr);
935 cm_node->hashkey = hashkey;
936
937 spin_lock_irqsave(&cm_core->ht_lock, flags);
938
939 /* get a handle on the hash table element (list head for this slot) */
940 hte = &cm_core->connected_nodes;
941 list_add_tail(&cm_node->list, hte);
942 atomic_inc(&cm_core->ht_node_cnt);
943
944 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
945
946 return 0;
947 }
948
949
950 /**
951 * mini_cm_dec_refcnt_listen
952 */
953 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
954 struct nes_cm_listener *listener, int free_hanging_nodes)
955 {
956 int ret = 1;
957 unsigned long flags;
958 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
959 if (!atomic_dec_return(&listener->ref_count)) {
960 list_del(&listener->list);
961
962 /* decrement our listen node count */
963 atomic_dec(&cm_core->listen_node_cnt);
964
965 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
966
967 if (listener->nesvnic) {
968 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
969 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
970 }
971
972 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
973
974 kfree(listener);
975 listener = NULL;
976 ret = 0;
977 cm_listens_destroyed++;
978 } else {
979 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
980 }
981 if (listener) {
982 if (atomic_read(&listener->pend_accepts_cnt) > 0)
983 nes_debug(NES_DBG_CM, "destroying listener (%p)"
984 " with non-zero pending accepts=%u\n",
985 listener, atomic_read(&listener->pend_accepts_cnt));
986 }
987
988 return ret;
989 }
990
991
992 /**
993 * mini_cm_del_listen
994 */
995 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
996 struct nes_cm_listener *listener)
997 {
998 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
999 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1000 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1001 }
1002
1003
1004 /**
1005 * mini_cm_accelerated
1006 */
1007 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1008 struct nes_cm_node *cm_node)
1009 {
1010 u32 was_timer_set;
1011 cm_node->accelerated = 1;
1012
1013 if (cm_node->accept_pend) {
1014 BUG_ON(!cm_node->listener);
1015 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1016 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1017 }
1018
1019 was_timer_set = timer_pending(&cm_core->tcp_timer);
1020 if (!was_timer_set) {
1021 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1022 add_timer(&cm_core->tcp_timer);
1023 }
1024
1025 return 0;
1026 }
1027
1028
1029 /**
1030 * nes_addr_send_arp
1031 */
1032 static void nes_addr_send_arp(u32 dst_ip)
1033 {
1034 struct rtable *rt;
1035 struct flowi fl;
1036
1037 memset(&fl, 0, sizeof fl);
1038 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1039 if (ip_route_output_key(&init_net, &rt, &fl)) {
1040 printk("%s: ip_route_output_key failed for 0x%08X\n",
1041 __FUNCTION__, dst_ip);
1042 return;
1043 }
1044
1045 neigh_event_send(rt->u.dst.neighbour, NULL);
1046 ip_rt_put(rt);
1047 }
1048
1049
1050 /**
1051 * make_cm_node - create a new instance of a cm node
1052 */
1053 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1054 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1055 struct nes_cm_listener *listener)
1056 {
1057 struct nes_cm_node *cm_node;
1058 struct timespec ts;
1059 int arpindex = 0;
1060 struct nes_device *nesdev;
1061 struct nes_adapter *nesadapter;
1062
1063 /* create an hte and cm_node for this instance */
1064 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1065 if (!cm_node)
1066 return NULL;
1067
1068 /* set our node specific transport info */
1069 cm_node->loc_addr = cm_info->loc_addr;
1070 cm_node->rem_addr = cm_info->rem_addr;
1071 cm_node->loc_port = cm_info->loc_port;
1072 cm_node->rem_port = cm_info->rem_port;
1073 cm_node->send_write0 = send_first;
1074 nes_debug(NES_DBG_CM, "Make node addresses : loc = %x:%x, rem = %x:%x\n",
1075 cm_node->loc_addr, cm_node->loc_port, cm_node->rem_addr, cm_node->rem_port);
1076 cm_node->listener = listener;
1077 cm_node->netdev = nesvnic->netdev;
1078 cm_node->cm_id = cm_info->cm_id;
1079 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1080
1081 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n",
1082 cm_node->listener, cm_node->cm_id);
1083
1084 INIT_LIST_HEAD(&cm_node->retrans_list);
1085 spin_lock_init(&cm_node->retrans_list_lock);
1086 INIT_LIST_HEAD(&cm_node->recv_list);
1087 spin_lock_init(&cm_node->recv_list_lock);
1088
1089 cm_node->loopbackpartner = NULL;
1090 atomic_set(&cm_node->ref_count, 1);
1091 /* associate our parent CM core */
1092 cm_node->cm_core = cm_core;
1093 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1094 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1095 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1096 NES_CM_DEFAULT_RCV_WND_SCALE;
1097 ts = current_kernel_time();
1098 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1099 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1100 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1101 cm_node->tcp_cntxt.rcv_nxt = 0;
1102 /* get a unique session ID , add thread_id to an upcounter to handle race */
1103 atomic_inc(&cm_core->node_cnt);
1104 atomic_inc(&cm_core->session_id);
1105 cm_node->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid);
1106 cm_node->conn_type = cm_info->conn_type;
1107 cm_node->apbvt_set = 0;
1108 cm_node->accept_pend = 0;
1109
1110 cm_node->nesvnic = nesvnic;
1111 /* get some device handles, for arp lookup */
1112 nesdev = nesvnic->nesdev;
1113 nesadapter = nesdev->nesadapter;
1114
1115 cm_node->loopbackpartner = NULL;
1116 /* get the mac addr for the remote node */
1117 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1118 if (arpindex < 0) {
1119 kfree(cm_node);
1120 nes_addr_send_arp(cm_info->rem_addr);
1121 return NULL;
1122 }
1123
1124 /* copy the mac addr to node context */
1125 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1126 nes_debug(NES_DBG_CM, "Remote mac addr from arp table:%02x,"
1127 " %02x, %02x, %02x, %02x, %02x\n",
1128 cm_node->rem_mac[0], cm_node->rem_mac[1],
1129 cm_node->rem_mac[2], cm_node->rem_mac[3],
1130 cm_node->rem_mac[4], cm_node->rem_mac[5]);
1131
1132 add_hte_node(cm_core, cm_node);
1133 atomic_inc(&cm_nodes_created);
1134
1135 return cm_node;
1136 }
1137
1138
1139 /**
1140 * add_ref_cm_node - destroy an instance of a cm node
1141 */
1142 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1143 {
1144 atomic_inc(&cm_node->ref_count);
1145 return 0;
1146 }
1147
1148
1149 /**
1150 * rem_ref_cm_node - destroy an instance of a cm node
1151 */
1152 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1153 struct nes_cm_node *cm_node)
1154 {
1155 unsigned long flags, qplockflags;
1156 struct nes_timer_entry *send_entry;
1157 struct nes_timer_entry *recv_entry;
1158 struct iw_cm_id *cm_id;
1159 struct list_head *list_core, *list_node_temp;
1160 struct nes_qp *nesqp;
1161
1162 if (!cm_node)
1163 return -EINVAL;
1164
1165 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1166 if (atomic_dec_return(&cm_node->ref_count)) {
1167 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1168 return 0;
1169 }
1170 list_del(&cm_node->list);
1171 atomic_dec(&cm_core->ht_node_cnt);
1172 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1173
1174 /* if the node is destroyed before connection was accelerated */
1175 if (!cm_node->accelerated && cm_node->accept_pend) {
1176 BUG_ON(!cm_node->listener);
1177 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1178 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1179 }
1180
1181 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1182 list_for_each_safe(list_core, list_node_temp, &cm_node->retrans_list) {
1183 send_entry = container_of(list_core, struct nes_timer_entry, list);
1184 list_del(&send_entry->list);
1185 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1186 dev_kfree_skb_any(send_entry->skb);
1187 kfree(send_entry);
1188 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1189 continue;
1190 }
1191 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1192
1193 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1194 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
1195 recv_entry = container_of(list_core, struct nes_timer_entry, list);
1196 list_del(&recv_entry->list);
1197 cm_id = cm_node->cm_id;
1198 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1199 if (recv_entry->type == NES_TIMER_TYPE_CLOSE) {
1200 nesqp = (struct nes_qp *)recv_entry->skb;
1201 spin_lock_irqsave(&nesqp->lock, qplockflags);
1202 if (nesqp->cm_id) {
1203 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: ****** HIT A NES_TIMER_TYPE_CLOSE"
1204 " with something to do!!! ******\n",
1205 nesqp->hwqp.qp_id, cm_id);
1206 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1207 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1208 nesqp->ibqp_state = IB_QPS_ERR;
1209 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1210 nes_cm_disconn(nesqp);
1211 } else {
1212 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1213 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: ****** HIT A NES_TIMER_TYPE_CLOSE"
1214 " with nothing to do!!! ******\n",
1215 nesqp->hwqp.qp_id, cm_id);
1216 nes_rem_ref(&nesqp->ibqp);
1217 }
1218 cm_id->rem_ref(cm_id);
1219 } else if (recv_entry->type == NES_TIMER_TYPE_RECV) {
1220 dev_kfree_skb_any(recv_entry->skb);
1221 }
1222 kfree(recv_entry);
1223 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1224 }
1225 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1226
1227 if (cm_node->listener) {
1228 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1229 } else {
1230 if (cm_node->apbvt_set && cm_node->nesvnic) {
1231 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1232 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1233 NES_MANAGE_APBVT_DEL);
1234 }
1235 }
1236
1237 kfree(cm_node);
1238 atomic_dec(&cm_core->node_cnt);
1239 atomic_inc(&cm_nodes_destroyed);
1240
1241 return 0;
1242 }
1243
1244
1245 /**
1246 * process_options
1247 */
1248 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc, u32 optionsize, u32 syn_packet)
1249 {
1250 u32 tmp;
1251 u32 offset = 0;
1252 union all_known_options *all_options;
1253 char got_mss_option = 0;
1254
1255 while (offset < optionsize) {
1256 all_options = (union all_known_options *)(optionsloc + offset);
1257 switch (all_options->as_base.optionnum) {
1258 case OPTION_NUMBER_END:
1259 offset = optionsize;
1260 break;
1261 case OPTION_NUMBER_NONE:
1262 offset += 1;
1263 continue;
1264 case OPTION_NUMBER_MSS:
1265 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d Size: %d\n",
1266 __FUNCTION__,
1267 all_options->as_mss.length, offset, optionsize);
1268 got_mss_option = 1;
1269 if (all_options->as_mss.length != 4) {
1270 return 1;
1271 } else {
1272 tmp = ntohs(all_options->as_mss.mss);
1273 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
1274 cm_node->tcp_cntxt.mss = tmp;
1275 }
1276 break;
1277 case OPTION_NUMBER_WINDOW_SCALE:
1278 cm_node->tcp_cntxt.snd_wscale = all_options->as_windowscale.shiftcount;
1279 break;
1280 case OPTION_NUMBER_WRITE0:
1281 cm_node->send_write0 = 1;
1282 break;
1283 default:
1284 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1285 all_options->as_base.optionnum);
1286 break;
1287 }
1288 offset += all_options->as_base.length;
1289 }
1290 if ((!got_mss_option) && (syn_packet))
1291 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1292 return 0;
1293 }
1294
1295
1296 /**
1297 * process_packet
1298 */
1299 static int process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1300 struct nes_cm_core *cm_core)
1301 {
1302 int optionsize;
1303 int datasize;
1304 int ret = 0;
1305 struct tcphdr *tcph = tcp_hdr(skb);
1306 u32 inc_sequence;
1307 if (cm_node->state == NES_CM_STATE_SYN_SENT && tcph->syn) {
1308 inc_sequence = ntohl(tcph->seq);
1309 cm_node->tcp_cntxt.rcv_nxt = inc_sequence;
1310 }
1311
1312 if ((!tcph) || (cm_node->state == NES_CM_STATE_TSA)) {
1313 BUG_ON(!tcph);
1314 atomic_inc(&cm_accel_dropped_pkts);
1315 return -1;
1316 }
1317
1318 if (tcph->rst) {
1319 atomic_inc(&cm_resets_recvd);
1320 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u. refcnt=%d\n",
1321 cm_node, cm_node->state, atomic_read(&cm_node->ref_count));
1322 switch (cm_node->state) {
1323 case NES_CM_STATE_LISTENING:
1324 rem_ref_cm_node(cm_core, cm_node);
1325 break;
1326 case NES_CM_STATE_TSA:
1327 case NES_CM_STATE_CLOSED:
1328 break;
1329 case NES_CM_STATE_SYN_RCVD:
1330 nes_debug(NES_DBG_CM, "Received a reset for local 0x%08X:%04X,"
1331 " remote 0x%08X:%04X, node state = %u\n",
1332 cm_node->loc_addr, cm_node->loc_port,
1333 cm_node->rem_addr, cm_node->rem_port,
1334 cm_node->state);
1335 rem_ref_cm_node(cm_core, cm_node);
1336 break;
1337 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1338 case NES_CM_STATE_ESTABLISHED:
1339 case NES_CM_STATE_MPAREQ_SENT:
1340 default:
1341 nes_debug(NES_DBG_CM, "Received a reset for local 0x%08X:%04X,"
1342 " remote 0x%08X:%04X, node state = %u refcnt=%d\n",
1343 cm_node->loc_addr, cm_node->loc_port,
1344 cm_node->rem_addr, cm_node->rem_port,
1345 cm_node->state, atomic_read(&cm_node->ref_count));
1346 // create event
1347 cm_node->state = NES_CM_STATE_CLOSED;
1348
1349 create_event(cm_node, NES_CM_EVENT_ABORTED);
1350 break;
1351
1352 }
1353 return -1;
1354 }
1355
1356 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1357
1358 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1359 skb_pull(skb, tcph->doff << 2);
1360
1361 datasize = skb->len;
1362 inc_sequence = ntohl(tcph->seq);
1363 nes_debug(NES_DBG_CM, "datasize = %u, sequence = 0x%08X, ack_seq = 0x%08X,"
1364 " rcv_nxt = 0x%08X Flags: %s %s.\n",
1365 datasize, inc_sequence, ntohl(tcph->ack_seq),
1366 cm_node->tcp_cntxt.rcv_nxt, (tcph->syn ? "SYN":""),
1367 (tcph->ack ? "ACK":""));
1368
1369 if (!tcph->syn && (inc_sequence != cm_node->tcp_cntxt.rcv_nxt)
1370 ) {
1371 nes_debug(NES_DBG_CM, "dropping packet, datasize = %u, sequence = 0x%08X,"
1372 " ack_seq = 0x%08X, rcv_nxt = 0x%08X Flags: %s.\n",
1373 datasize, inc_sequence, ntohl(tcph->ack_seq),
1374 cm_node->tcp_cntxt.rcv_nxt, (tcph->ack ? "ACK":""));
1375 if (cm_node->state == NES_CM_STATE_LISTENING) {
1376 rem_ref_cm_node(cm_core, cm_node);
1377 }
1378 return -1;
1379 }
1380
1381 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1382
1383
1384 if (optionsize) {
1385 u8 *optionsloc = (u8 *)&tcph[1];
1386 if (process_options(cm_node, optionsloc, optionsize, (u32)tcph->syn)) {
1387 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n", __FUNCTION__, cm_node);
1388 send_reset(cm_node);
1389 if (cm_node->state != NES_CM_STATE_SYN_SENT)
1390 rem_ref_cm_node(cm_core, cm_node);
1391 return 0;
1392 }
1393 } else if (tcph->syn)
1394 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1395
1396 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1397 cm_node->tcp_cntxt.snd_wscale;
1398
1399 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) {
1400 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1401 }
1402
1403 if (tcph->ack) {
1404 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1405 switch (cm_node->state) {
1406 case NES_CM_STATE_SYN_RCVD:
1407 case NES_CM_STATE_SYN_SENT:
1408 /* read and stash current sequence number */
1409 if (cm_node->tcp_cntxt.rem_ack_num != cm_node->tcp_cntxt.loc_seq_num) {
1410 nes_debug(NES_DBG_CM, "ERROR - cm_node->tcp_cntxt.rem_ack_num !="
1411 " cm_node->tcp_cntxt.loc_seq_num\n");
1412 send_reset(cm_node);
1413 return 0;
1414 }
1415 if (cm_node->state == NES_CM_STATE_SYN_SENT)
1416 cm_node->state = NES_CM_STATE_ONE_SIDE_ESTABLISHED;
1417 else {
1418 cm_node->state = NES_CM_STATE_ESTABLISHED;
1419 }
1420 break;
1421 case NES_CM_STATE_LAST_ACK:
1422 cm_node->state = NES_CM_STATE_CLOSED;
1423 break;
1424 case NES_CM_STATE_FIN_WAIT1:
1425 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1426 break;
1427 case NES_CM_STATE_CLOSING:
1428 cm_node->state = NES_CM_STATE_TIME_WAIT;
1429 /* need to schedule this to happen in 2MSL timeouts */
1430 cm_node->state = NES_CM_STATE_CLOSED;
1431 break;
1432 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1433 case NES_CM_STATE_ESTABLISHED:
1434 case NES_CM_STATE_MPAREQ_SENT:
1435 case NES_CM_STATE_CLOSE_WAIT:
1436 case NES_CM_STATE_TIME_WAIT:
1437 case NES_CM_STATE_CLOSED:
1438 break;
1439 case NES_CM_STATE_LISTENING:
1440 nes_debug(NES_DBG_CM, "Received an ACK on a listening port (SYN %d)\n", tcph->syn);
1441 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1442 send_reset(cm_node);
1443 /* send_reset bumps refcount, this should have been a new node */
1444 rem_ref_cm_node(cm_core, cm_node);
1445 return -1;
1446 break;
1447 case NES_CM_STATE_TSA:
1448 nes_debug(NES_DBG_CM, "Received a packet with the ack bit set while in TSA state\n");
1449 break;
1450 case NES_CM_STATE_UNKNOWN:
1451 case NES_CM_STATE_INITED:
1452 case NES_CM_STATE_ACCEPTING:
1453 case NES_CM_STATE_FIN_WAIT2:
1454 default:
1455 nes_debug(NES_DBG_CM, "Received ack from unknown state: %x\n",
1456 cm_node->state);
1457 send_reset(cm_node);
1458 break;
1459 }
1460 }
1461
1462 if (tcph->syn) {
1463 if (cm_node->state == NES_CM_STATE_LISTENING) {
1464 /* do not exceed backlog */
1465 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1466 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1467 cm_node->listener->backlog) {
1468 nes_debug(NES_DBG_CM, "drop syn due to backlog pressure \n");
1469 cm_backlog_drops++;
1470 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1471 rem_ref_cm_node(cm_core, cm_node);
1472 return 0;
1473 }
1474 cm_node->accept_pend = 1;
1475
1476 }
1477 if (datasize == 0)
1478 cm_node->tcp_cntxt.rcv_nxt ++;
1479
1480 if (cm_node->state == NES_CM_STATE_LISTENING) {
1481 cm_node->state = NES_CM_STATE_SYN_RCVD;
1482 send_syn(cm_node, 1);
1483 }
1484 if (cm_node->state == NES_CM_STATE_ONE_SIDE_ESTABLISHED) {
1485 cm_node->state = NES_CM_STATE_ESTABLISHED;
1486 /* send final handshake ACK */
1487 ret = send_ack(cm_node);
1488 if (ret < 0)
1489 return ret;
1490
1491 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1492 ret = send_mpa_request(cm_node);
1493 if (ret < 0)
1494 return ret;
1495 }
1496 }
1497
1498 if (tcph->fin) {
1499 cm_node->tcp_cntxt.rcv_nxt++;
1500 switch (cm_node->state) {
1501 case NES_CM_STATE_SYN_RCVD:
1502 case NES_CM_STATE_SYN_SENT:
1503 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1504 case NES_CM_STATE_ESTABLISHED:
1505 case NES_CM_STATE_ACCEPTING:
1506 case NES_CM_STATE_MPAREQ_SENT:
1507 cm_node->state = NES_CM_STATE_CLOSE_WAIT;
1508 cm_node->state = NES_CM_STATE_LAST_ACK;
1509 ret = send_fin(cm_node, NULL);
1510 break;
1511 case NES_CM_STATE_FIN_WAIT1:
1512 cm_node->state = NES_CM_STATE_CLOSING;
1513 ret = send_ack(cm_node);
1514 break;
1515 case NES_CM_STATE_FIN_WAIT2:
1516 cm_node->state = NES_CM_STATE_TIME_WAIT;
1517 cm_node->tcp_cntxt.loc_seq_num ++;
1518 ret = send_ack(cm_node);
1519 /* need to schedule this to happen in 2MSL timeouts */
1520 cm_node->state = NES_CM_STATE_CLOSED;
1521 break;
1522 case NES_CM_STATE_CLOSE_WAIT:
1523 case NES_CM_STATE_LAST_ACK:
1524 case NES_CM_STATE_CLOSING:
1525 case NES_CM_STATE_TSA:
1526 default:
1527 nes_debug(NES_DBG_CM, "Received a fin while in %x state\n",
1528 cm_node->state);
1529 ret = -EINVAL;
1530 break;
1531 }
1532 }
1533
1534 if (datasize) {
1535 u8 *dataloc = skb->data;
1536 /* figure out what state we are in and handle transition to next state */
1537 switch (cm_node->state) {
1538 case NES_CM_STATE_LISTENING:
1539 case NES_CM_STATE_SYN_RCVD:
1540 case NES_CM_STATE_SYN_SENT:
1541 case NES_CM_STATE_FIN_WAIT1:
1542 case NES_CM_STATE_FIN_WAIT2:
1543 case NES_CM_STATE_CLOSE_WAIT:
1544 case NES_CM_STATE_LAST_ACK:
1545 case NES_CM_STATE_CLOSING:
1546 break;
1547 case NES_CM_STATE_MPAREQ_SENT:
1548 /* recv the mpa res frame, ret=frame len (incl priv data) */
1549 ret = parse_mpa(cm_node, dataloc, datasize);
1550 if (ret < 0)
1551 break;
1552 /* set the req frame payload len in skb */
1553 /* we are done handling this state, set node to a TSA state */
1554 cm_node->state = NES_CM_STATE_TSA;
1555 send_ack(cm_node);
1556 create_event(cm_node, NES_CM_EVENT_CONNECTED);
1557 break;
1558
1559 case NES_CM_STATE_ESTABLISHED:
1560 /* we are expecting an MPA req frame */
1561 ret = parse_mpa(cm_node, dataloc, datasize);
1562 if (ret < 0) {
1563 break;
1564 }
1565 cm_node->state = NES_CM_STATE_TSA;
1566 send_ack(cm_node);
1567 /* we got a valid MPA request, create an event */
1568 create_event(cm_node, NES_CM_EVENT_MPA_REQ);
1569 break;
1570 case NES_CM_STATE_TSA:
1571 handle_exception_pkt(cm_node, skb);
1572 break;
1573 case NES_CM_STATE_UNKNOWN:
1574 case NES_CM_STATE_INITED:
1575 default:
1576 ret = -1;
1577 }
1578 }
1579
1580 return ret;
1581 }
1582
1583
1584 /**
1585 * mini_cm_listen - create a listen node with params
1586 */
1587 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1588 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1589 {
1590 struct nes_cm_listener *listener;
1591 unsigned long flags;
1592
1593 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1594 cm_info->loc_addr, cm_info->loc_port);
1595
1596 /* cannot have multiple matching listeners */
1597 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1598 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1599 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1600 /* find automatically incs ref count ??? */
1601 atomic_dec(&listener->ref_count);
1602 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1603 return NULL;
1604 }
1605
1606 if (!listener) {
1607 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1608 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1609 if (!listener) {
1610 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1611 return NULL;
1612 }
1613
1614 memset(listener, 0, sizeof(struct nes_cm_listener));
1615 listener->loc_addr = htonl(cm_info->loc_addr);
1616 listener->loc_port = htons(cm_info->loc_port);
1617 listener->reused_node = 0;
1618
1619 atomic_set(&listener->ref_count, 1);
1620 }
1621 /* pasive case */
1622 /* find already inc'ed the ref count */
1623 else {
1624 listener->reused_node = 1;
1625 }
1626
1627 listener->cm_id = cm_info->cm_id;
1628 atomic_set(&listener->pend_accepts_cnt, 0);
1629 listener->cm_core = cm_core;
1630 listener->nesvnic = nesvnic;
1631 atomic_inc(&cm_core->node_cnt);
1632 atomic_inc(&cm_core->session_id);
1633
1634 listener->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid);
1635 listener->conn_type = cm_info->conn_type;
1636 listener->backlog = cm_info->backlog;
1637 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1638
1639 if (!listener->reused_node) {
1640 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1641 list_add(&listener->list, &cm_core->listen_list.list);
1642 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1643 atomic_inc(&cm_core->listen_node_cnt);
1644 }
1645
1646 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1647 " listener = %p, backlog = %d, cm_id = %p.\n",
1648 cm_info->loc_addr, cm_info->loc_port,
1649 listener, listener->backlog, listener->cm_id);
1650
1651 return listener;
1652 }
1653
1654
1655 /**
1656 * mini_cm_connect - make a connection node with params
1657 */
1658 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1659 struct nes_vnic *nesvnic,
1660 struct ietf_mpa_frame *mpa_frame,
1661 struct nes_cm_info *cm_info)
1662 {
1663 int ret = 0;
1664 struct nes_cm_node *cm_node;
1665 struct nes_cm_listener *loopbackremotelistener;
1666 struct nes_cm_node *loopbackremotenode;
1667 struct nes_cm_info loopback_cm_info;
1668
1669 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) +
1670 ntohs(mpa_frame->priv_data_len);
1671
1672 cm_info->loc_addr = htonl(cm_info->loc_addr);
1673 cm_info->rem_addr = htonl(cm_info->rem_addr);
1674 cm_info->loc_port = htons(cm_info->loc_port);
1675 cm_info->rem_port = htons(cm_info->rem_port);
1676
1677 /* create a CM connection node */
1678 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1679 if (!cm_node)
1680 return NULL;
1681
1682 // set our node side to client (active) side
1683 cm_node->tcp_cntxt.client = 1;
1684 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1685
1686 if (cm_info->loc_addr == cm_info->rem_addr) {
1687 loopbackremotelistener = find_listener(cm_core, cm_node->rem_addr,
1688 cm_node->rem_port, NES_CM_LISTENER_ACTIVE_STATE);
1689 if (loopbackremotelistener == NULL) {
1690 create_event(cm_node, NES_CM_EVENT_ABORTED);
1691 } else {
1692 atomic_inc(&cm_loopbacks);
1693 loopback_cm_info = *cm_info;
1694 loopback_cm_info.loc_port = cm_info->rem_port;
1695 loopback_cm_info.rem_port = cm_info->loc_port;
1696 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
1697 loopbackremotenode = make_cm_node(cm_core, nesvnic, &loopback_cm_info,
1698 loopbackremotelistener);
1699 loopbackremotenode->loopbackpartner = cm_node;
1700 loopbackremotenode->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1701 cm_node->loopbackpartner = loopbackremotenode;
1702 memcpy(loopbackremotenode->mpa_frame_buf, &mpa_frame->priv_data,
1703 mpa_frame_size);
1704 loopbackremotenode->mpa_frame_size = mpa_frame_size -
1705 sizeof(struct ietf_mpa_frame);
1706
1707 // we are done handling this state, set node to a TSA state
1708 cm_node->state = NES_CM_STATE_TSA;
1709 cm_node->tcp_cntxt.rcv_nxt = loopbackremotenode->tcp_cntxt.loc_seq_num;
1710 loopbackremotenode->tcp_cntxt.rcv_nxt = cm_node->tcp_cntxt.loc_seq_num;
1711 cm_node->tcp_cntxt.max_snd_wnd = loopbackremotenode->tcp_cntxt.rcv_wnd;
1712 loopbackremotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
1713 cm_node->tcp_cntxt.snd_wnd = loopbackremotenode->tcp_cntxt.rcv_wnd;
1714 loopbackremotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
1715 cm_node->tcp_cntxt.snd_wscale = loopbackremotenode->tcp_cntxt.rcv_wscale;
1716 loopbackremotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
1717
1718 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1719 }
1720 return cm_node;
1721 }
1722
1723 /* set our node side to client (active) side */
1724 cm_node->tcp_cntxt.client = 1;
1725 /* init our MPA frame ptr */
1726 memcpy(&cm_node->mpa_frame, mpa_frame, mpa_frame_size);
1727 cm_node->mpa_frame_size = mpa_frame_size;
1728
1729 /* send a syn and goto syn sent state */
1730 cm_node->state = NES_CM_STATE_SYN_SENT;
1731 ret = send_syn(cm_node, 0);
1732
1733 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X, port=0x%04x,"
1734 " cm_node=%p, cm_id = %p.\n",
1735 cm_node->rem_addr, cm_node->rem_port, cm_node, cm_node->cm_id);
1736
1737 return cm_node;
1738 }
1739
1740
1741 /**
1742 * mini_cm_accept - accept a connection
1743 * This function is never called
1744 */
1745 static int mini_cm_accept(struct nes_cm_core *cm_core, struct ietf_mpa_frame *mpa_frame,
1746 struct nes_cm_node *cm_node)
1747 {
1748 return 0;
1749 }
1750
1751
1752 /**
1753 * mini_cm_reject - reject and teardown a connection
1754 */
1755 static int mini_cm_reject(struct nes_cm_core *cm_core,
1756 struct ietf_mpa_frame *mpa_frame,
1757 struct nes_cm_node *cm_node)
1758 {
1759 int ret = 0;
1760 struct sk_buff *skb;
1761 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) +
1762 ntohs(mpa_frame->priv_data_len);
1763
1764 skb = get_free_pkt(cm_node);
1765 if (!skb) {
1766 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1767 return -1;
1768 }
1769
1770 /* send an MPA Request frame */
1771 form_cm_frame(skb, cm_node, NULL, 0, mpa_frame, mpa_frame_size, SET_ACK | SET_FIN);
1772 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1773
1774 cm_node->state = NES_CM_STATE_CLOSED;
1775 ret = send_fin(cm_node, NULL);
1776
1777 if (ret < 0) {
1778 printk(KERN_INFO PFX "failed to send MPA Reply (reject)\n");
1779 return ret;
1780 }
1781
1782 return ret;
1783 }
1784
1785
1786 /**
1787 * mini_cm_close
1788 */
1789 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1790 {
1791 int ret = 0;
1792
1793 if (!cm_core || !cm_node)
1794 return -EINVAL;
1795
1796 switch (cm_node->state) {
1797 /* if passed in node is null, create a reference key node for node search */
1798 /* check if we found an owner node for this pkt */
1799 case NES_CM_STATE_SYN_RCVD:
1800 case NES_CM_STATE_SYN_SENT:
1801 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1802 case NES_CM_STATE_ESTABLISHED:
1803 case NES_CM_STATE_ACCEPTING:
1804 case NES_CM_STATE_MPAREQ_SENT:
1805 cm_node->state = NES_CM_STATE_FIN_WAIT1;
1806 send_fin(cm_node, NULL);
1807 break;
1808 case NES_CM_STATE_CLOSE_WAIT:
1809 cm_node->state = NES_CM_STATE_LAST_ACK;
1810 send_fin(cm_node, NULL);
1811 break;
1812 case NES_CM_STATE_FIN_WAIT1:
1813 case NES_CM_STATE_FIN_WAIT2:
1814 case NES_CM_STATE_LAST_ACK:
1815 case NES_CM_STATE_TIME_WAIT:
1816 case NES_CM_STATE_CLOSING:
1817 ret = -1;
1818 break;
1819 case NES_CM_STATE_LISTENING:
1820 case NES_CM_STATE_UNKNOWN:
1821 case NES_CM_STATE_INITED:
1822 case NES_CM_STATE_CLOSED:
1823 case NES_CM_STATE_TSA:
1824 ret = rem_ref_cm_node(cm_core, cm_node);
1825 break;
1826 }
1827 cm_node->cm_id = NULL;
1828 return ret;
1829 }
1830
1831
1832 /**
1833 * recv_pkt - recv an ETHERNET packet, and process it through CM
1834 * node state machine
1835 */
1836 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core, struct nes_vnic *nesvnic,
1837 struct sk_buff *skb)
1838 {
1839 struct nes_cm_node *cm_node = NULL;
1840 struct nes_cm_listener *listener = NULL;
1841 struct iphdr *iph;
1842 struct tcphdr *tcph;
1843 struct nes_cm_info nfo;
1844 int ret = 0;
1845
1846 if (!skb || skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
1847 ret = -EINVAL;
1848 goto out;
1849 }
1850
1851 iph = (struct iphdr *)skb->data;
1852 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
1853 skb_reset_network_header(skb);
1854 skb_set_transport_header(skb, sizeof(*tcph));
1855 skb->len = ntohs(iph->tot_len);
1856
1857 nfo.loc_addr = ntohl(iph->daddr);
1858 nfo.loc_port = ntohs(tcph->dest);
1859 nfo.rem_addr = ntohl(iph->saddr);
1860 nfo.rem_port = ntohs(tcph->source);
1861
1862 nes_debug(NES_DBG_CM, "Received packet: dest=0x%08X:0x%04X src=0x%08X:0x%04X\n",
1863 iph->daddr, tcph->dest, iph->saddr, tcph->source);
1864
1865 /* note: this call is going to increment cm_node ref count */
1866 cm_node = find_node(cm_core,
1867 nfo.rem_port, nfo.rem_addr,
1868 nfo.loc_port, nfo.loc_addr);
1869
1870 if (!cm_node) {
1871 listener = find_listener(cm_core, nfo.loc_addr, nfo.loc_port,
1872 NES_CM_LISTENER_ACTIVE_STATE);
1873 if (listener) {
1874 nfo.cm_id = listener->cm_id;
1875 nfo.conn_type = listener->conn_type;
1876 } else {
1877 nfo.cm_id = NULL;
1878 nfo.conn_type = 0;
1879 }
1880
1881 cm_node = make_cm_node(cm_core, nesvnic, &nfo, listener);
1882 if (!cm_node) {
1883 nes_debug(NES_DBG_CM, "Unable to allocate node\n");
1884 if (listener) {
1885 nes_debug(NES_DBG_CM, "unable to allocate node and decrementing listener refcount\n");
1886 atomic_dec(&listener->ref_count);
1887 }
1888 ret = -1;
1889 goto out;
1890 }
1891 if (!listener) {
1892 nes_debug(NES_DBG_CM, "Packet found for unknown port %x refcnt=%d\n",
1893 nfo.loc_port, atomic_read(&cm_node->ref_count));
1894 if (!tcph->rst) {
1895 nes_debug(NES_DBG_CM, "Packet found for unknown port=%d"
1896 " rem_port=%d refcnt=%d\n",
1897 nfo.loc_port, nfo.rem_port, atomic_read(&cm_node->ref_count));
1898
1899 cm_node->tcp_cntxt.rcv_nxt = ntohl(tcph->seq);
1900 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1901 send_reset(cm_node);
1902 }
1903 rem_ref_cm_node(cm_core, cm_node);
1904 ret = -1;
1905 goto out;
1906 }
1907 add_ref_cm_node(cm_node);
1908 cm_node->state = NES_CM_STATE_LISTENING;
1909 }
1910
1911 nes_debug(NES_DBG_CM, "Processing Packet for node %p, data = (%p):\n",
1912 cm_node, skb->data);
1913 process_packet(cm_node, skb, cm_core);
1914
1915 rem_ref_cm_node(cm_core, cm_node);
1916 out:
1917 if (skb)
1918 dev_kfree_skb_any(skb);
1919 return ret;
1920 }
1921
1922
1923 /**
1924 * nes_cm_alloc_core - allocate a top level instance of a cm core
1925 */
1926 static struct nes_cm_core *nes_cm_alloc_core(void)
1927 {
1928 int i;
1929
1930 struct nes_cm_core *cm_core;
1931 struct sk_buff *skb = NULL;
1932
1933 /* setup the CM core */
1934 /* alloc top level core control structure */
1935 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
1936 if (!cm_core)
1937 return NULL;
1938
1939 INIT_LIST_HEAD(&cm_core->connected_nodes);
1940 init_timer(&cm_core->tcp_timer);
1941 cm_core->tcp_timer.function = nes_cm_timer_tick;
1942
1943 cm_core->mtu = NES_CM_DEFAULT_MTU;
1944 cm_core->state = NES_CM_STATE_INITED;
1945 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
1946
1947 atomic_set(&cm_core->session_id, 0);
1948 atomic_set(&cm_core->events_posted, 0);
1949
1950 /* init the packet lists */
1951 skb_queue_head_init(&cm_core->tx_free_list);
1952
1953 for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) {
1954 skb = dev_alloc_skb(cm_core->mtu);
1955 if (!skb) {
1956 kfree(cm_core);
1957 return NULL;
1958 }
1959 /* add 'raw' skb to free frame list */
1960 skb_queue_head(&cm_core->tx_free_list, skb);
1961 }
1962
1963 cm_core->api = &nes_cm_api;
1964
1965 spin_lock_init(&cm_core->ht_lock);
1966 spin_lock_init(&cm_core->listen_list_lock);
1967
1968 INIT_LIST_HEAD(&cm_core->listen_list.list);
1969
1970 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
1971
1972 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
1973 cm_core->event_wq = create_singlethread_workqueue("nesewq");
1974 cm_core->post_event = nes_cm_post_event;
1975 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
1976 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
1977
1978 print_core(cm_core);
1979 return cm_core;
1980 }
1981
1982
1983 /**
1984 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
1985 */
1986 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
1987 {
1988 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
1989
1990 if (!cm_core)
1991 return -EINVAL;
1992
1993 barrier();
1994
1995 if (timer_pending(&cm_core->tcp_timer)) {
1996 del_timer(&cm_core->tcp_timer);
1997 }
1998
1999 destroy_workqueue(cm_core->event_wq);
2000 destroy_workqueue(cm_core->disconn_wq);
2001 nes_debug(NES_DBG_CM, "\n");
2002 kfree(cm_core);
2003
2004 return 0;
2005 }
2006
2007
2008 /**
2009 * mini_cm_get
2010 */
2011 static int mini_cm_get(struct nes_cm_core *cm_core)
2012 {
2013 return cm_core->state;
2014 }
2015
2016
2017 /**
2018 * mini_cm_set
2019 */
2020 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2021 {
2022 int ret = 0;
2023
2024 switch (type) {
2025 case NES_CM_SET_PKT_SIZE:
2026 cm_core->mtu = value;
2027 break;
2028 case NES_CM_SET_FREE_PKT_Q_SIZE:
2029 cm_core->free_tx_pkt_max = value;
2030 break;
2031 default:
2032 /* unknown set option */
2033 ret = -EINVAL;
2034 }
2035
2036 return ret;
2037 }
2038
2039
2040 /**
2041 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2042 * successfully exchanged when this is called
2043 */
2044 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2045 {
2046 int ret = 0;
2047
2048 if (!nesqp)
2049 return -EINVAL;
2050
2051 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2052 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2053 NES_QPCONTEXT_MISC_DROS);
2054
2055 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2056 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2057
2058 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2059
2060 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2061
2062 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2063 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2064
2065 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2066 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2067 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2068
2069 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2070 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2071 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2072
2073 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2074 nesqp->nesqp_context->ts_recent = 0;
2075 nesqp->nesqp_context->ts_age = 0;
2076 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2077 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2078 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2079 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2080 cm_node->tcp_cntxt.rcv_wscale);
2081 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2082 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2083 nesqp->nesqp_context->srtt = 0;
2084 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2085 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2086 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2087 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2088 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2089 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2090
2091 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2092 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2093 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2094 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2095 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2096 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2097 le32_to_cpu(nesqp->nesqp_context->misc));
2098 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2099 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2100 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2101
2102 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2103 cm_node->state = NES_CM_STATE_TSA;
2104
2105 return ret;
2106 }
2107
2108
2109 /**
2110 * nes_cm_disconn
2111 */
2112 int nes_cm_disconn(struct nes_qp *nesqp)
2113 {
2114 unsigned long flags;
2115
2116 spin_lock_irqsave(&nesqp->lock, flags);
2117 if (nesqp->disconn_pending == 0) {
2118 nesqp->disconn_pending++;
2119 spin_unlock_irqrestore(&nesqp->lock, flags);
2120 /* nes_add_ref(&nesqp->ibqp); */
2121 /* init our disconnect work element, to */
2122 INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
2123
2124 queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
2125 } else {
2126 spin_unlock_irqrestore(&nesqp->lock, flags);
2127 nes_rem_ref(&nesqp->ibqp);
2128 }
2129
2130 return 0;
2131 }
2132
2133
2134 /**
2135 * nes_disconnect_worker
2136 */
2137 static void nes_disconnect_worker(struct work_struct *work)
2138 {
2139 struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
2140
2141 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2142 nesqp->last_aeq, nesqp->hwqp.qp_id);
2143 nes_cm_disconn_true(nesqp);
2144 }
2145
2146
2147 /**
2148 * nes_cm_disconn_true
2149 */
2150 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2151 {
2152 unsigned long flags;
2153 int ret = 0;
2154 struct iw_cm_id *cm_id;
2155 struct iw_cm_event cm_event;
2156 struct nes_vnic *nesvnic;
2157 u16 last_ae;
2158 u8 original_hw_tcp_state;
2159 u8 original_ibqp_state;
2160 u8 issued_disconnect_reset = 0;
2161
2162 if (!nesqp) {
2163 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2164 return -1;
2165 }
2166
2167 spin_lock_irqsave(&nesqp->lock, flags);
2168 cm_id = nesqp->cm_id;
2169 /* make sure we havent already closed this connection */
2170 if (!cm_id) {
2171 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2172 nesqp->hwqp.qp_id);
2173 spin_unlock_irqrestore(&nesqp->lock, flags);
2174 nes_rem_ref(&nesqp->ibqp);
2175 return -1;
2176 }
2177
2178 nesvnic = to_nesvnic(nesqp->ibqp.device);
2179 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2180
2181 original_hw_tcp_state = nesqp->hw_tcp_state;
2182 original_ibqp_state = nesqp->ibqp_state;
2183 last_ae = nesqp->last_aeq;
2184
2185
2186 nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
2187
2188 if ((nesqp->cm_id) && (cm_id->event_handler)) {
2189 if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2190 ((original_ibqp_state == IB_QPS_RTS) &&
2191 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2192 atomic_inc(&cm_disconnects);
2193 cm_event.event = IW_CM_EVENT_DISCONNECT;
2194 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
2195 issued_disconnect_reset = 1;
2196 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2197 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event (status reset) for "
2198 " QP%u, cm_id = %p. \n",
2199 nesqp->hwqp.qp_id, cm_id);
2200 } else {
2201 cm_event.status = IW_CM_EVENT_STATUS_OK;
2202 }
2203
2204 cm_event.local_addr = cm_id->local_addr;
2205 cm_event.remote_addr = cm_id->remote_addr;
2206 cm_event.private_data = NULL;
2207 cm_event.private_data_len = 0;
2208
2209 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event for "
2210 " QP%u, SQ Head = %u, SQ Tail = %u. cm_id = %p, refcount = %u.\n",
2211 nesqp->hwqp.qp_id,
2212 nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail, cm_id,
2213 atomic_read(&nesqp->refcount));
2214
2215 spin_unlock_irqrestore(&nesqp->lock, flags);
2216 ret = cm_id->event_handler(cm_id, &cm_event);
2217 if (ret)
2218 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2219 spin_lock_irqsave(&nesqp->lock, flags);
2220 }
2221
2222 nesqp->disconn_pending = 0;
2223 /* There might have been another AE while the lock was released */
2224 original_hw_tcp_state = nesqp->hw_tcp_state;
2225 original_ibqp_state = nesqp->ibqp_state;
2226 last_ae = nesqp->last_aeq;
2227
2228 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2229 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2230 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2231 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2232 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2233 atomic_inc(&cm_closes);
2234 nesqp->cm_id = NULL;
2235 nesqp->in_disconnect = 0;
2236 spin_unlock_irqrestore(&nesqp->lock, flags);
2237 nes_disconnect(nesqp, 1);
2238
2239 cm_id->provider_data = nesqp;
2240 /* Send up the close complete event */
2241 cm_event.event = IW_CM_EVENT_CLOSE;
2242 cm_event.status = IW_CM_EVENT_STATUS_OK;
2243 cm_event.provider_data = cm_id->provider_data;
2244 cm_event.local_addr = cm_id->local_addr;
2245 cm_event.remote_addr = cm_id->remote_addr;
2246 cm_event.private_data = NULL;
2247 cm_event.private_data_len = 0;
2248
2249 ret = cm_id->event_handler(cm_id, &cm_event);
2250 if (ret) {
2251 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2252 }
2253
2254 cm_id->rem_ref(cm_id);
2255
2256 spin_lock_irqsave(&nesqp->lock, flags);
2257 if (nesqp->flush_issued == 0) {
2258 nesqp->flush_issued = 1;
2259 spin_unlock_irqrestore(&nesqp->lock, flags);
2260 flush_wqes(nesvnic->nesdev, nesqp, NES_CQP_FLUSH_RQ, 1);
2261 } else {
2262 spin_unlock_irqrestore(&nesqp->lock, flags);
2263 }
2264
2265 /* This reference is from either ModifyQP or the AE processing,
2266 there is still a race here with modifyqp */
2267 nes_rem_ref(&nesqp->ibqp);
2268
2269 } else {
2270 cm_id = nesqp->cm_id;
2271 spin_unlock_irqrestore(&nesqp->lock, flags);
2272 /* check to see if the inbound reset beat the outbound reset */
2273 if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
2274 nes_debug(NES_DBG_CM, "QP%u: Decing refcount due to inbound reset"
2275 " beating the outbound reset.\n",
2276 nesqp->hwqp.qp_id);
2277 nes_rem_ref(&nesqp->ibqp);
2278 }
2279 }
2280 } else {
2281 nesqp->disconn_pending = 0;
2282 spin_unlock_irqrestore(&nesqp->lock, flags);
2283 }
2284 nes_rem_ref(&nesqp->ibqp);
2285
2286 return 0;
2287 }
2288
2289
2290 /**
2291 * nes_disconnect
2292 */
2293 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2294 {
2295 int ret = 0;
2296 struct nes_vnic *nesvnic;
2297 struct nes_device *nesdev;
2298
2299 nesvnic = to_nesvnic(nesqp->ibqp.device);
2300 if (!nesvnic)
2301 return -EINVAL;
2302
2303 nesdev = nesvnic->nesdev;
2304
2305 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2306 atomic_read(&nesvnic->netdev->refcnt));
2307
2308 if (nesqp->active_conn) {
2309
2310 /* indicate this connection is NOT active */
2311 nesqp->active_conn = 0;
2312 } else {
2313 /* Need to free the Last Streaming Mode Message */
2314 if (nesqp->ietf_frame) {
2315 pci_free_consistent(nesdev->pcidev,
2316 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2317 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2318 }
2319 }
2320
2321 /* close the CM node down if it is still active */
2322 if (nesqp->cm_node) {
2323 nes_debug(NES_DBG_CM, "Call close API\n");
2324
2325 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2326 nesqp->cm_node = NULL;
2327 }
2328
2329 return ret;
2330 }
2331
2332
2333 /**
2334 * nes_accept
2335 */
2336 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2337 {
2338 u64 u64temp;
2339 struct ib_qp *ibqp;
2340 struct nes_qp *nesqp;
2341 struct nes_vnic *nesvnic;
2342 struct nes_device *nesdev;
2343 struct nes_cm_node *cm_node;
2344 struct nes_adapter *adapter;
2345 struct ib_qp_attr attr;
2346 struct iw_cm_event cm_event;
2347 struct nes_hw_qp_wqe *wqe;
2348 struct nes_v4_quad nes_quad;
2349 u32 crc_value;
2350 int ret;
2351
2352 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2353 if (!ibqp)
2354 return -EINVAL;
2355
2356 /* get all our handles */
2357 nesqp = to_nesqp(ibqp);
2358 nesvnic = to_nesvnic(nesqp->ibqp.device);
2359 nesdev = nesvnic->nesdev;
2360 adapter = nesdev->nesadapter;
2361
2362 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2363 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2364
2365 /* since this is from a listen, we were able to put node handle into cm_id */
2366 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2367
2368 /* associate the node with the QP */
2369 nesqp->cm_node = (void *)cm_node;
2370
2371 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu\n",
2372 nesqp->hwqp.qp_id, cm_node, jiffies);
2373 atomic_inc(&cm_accepts);
2374
2375 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2376 atomic_read(&nesvnic->netdev->refcnt));
2377
2378 /* allocate the ietf frame and space for private data */
2379 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2380 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2381 &nesqp->ietf_frame_pbase);
2382
2383 if (!nesqp->ietf_frame) {
2384 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
2385 return -ENOMEM;
2386 }
2387
2388
2389 /* setup the MPA frame */
2390 nesqp->private_data_len = conn_param->private_data_len;
2391 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2392
2393 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2394 conn_param->private_data_len);
2395
2396 nesqp->ietf_frame->priv_data_len = cpu_to_be16(conn_param->private_data_len);
2397 nesqp->ietf_frame->rev = mpa_version;
2398 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2399
2400 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2401 wqe = &nesqp->hwqp.sq_vbase[0];
2402
2403 if (cm_id->remote_addr.sin_addr.s_addr != cm_id->local_addr.sin_addr.s_addr) {
2404 u64temp = (unsigned long)nesqp;
2405 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2406 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2407 u64temp);
2408 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2409 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING | NES_IWARP_SQ_WQE_WRPDU);
2410 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2411 cpu_to_le32(conn_param->private_data_len + sizeof(struct ietf_mpa_frame));
2412 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
2413 cpu_to_le32((u32)nesqp->ietf_frame_pbase);
2414 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
2415 cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
2416 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2417 cpu_to_le32(conn_param->private_data_len + sizeof(struct ietf_mpa_frame));
2418 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2419
2420 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2421 NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | NES_QPCONTEXT_ORDIRD_WRPDU);
2422 } else {
2423 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2424 NES_QPCONTEXT_ORDIRD_WRPDU | NES_QPCONTEXT_ORDIRD_ALSMM));
2425 }
2426 nesqp->skip_lsmm = 1;
2427
2428
2429 /* Cache the cm_id in the qp */
2430 nesqp->cm_id = cm_id;
2431 cm_node->cm_id = cm_id;
2432
2433 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2434 cm_id->provider_data = nesqp;
2435 nesqp->active_conn = 0;
2436
2437 nes_cm_init_tsa_conn(nesqp, cm_node);
2438
2439 nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2440 nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2441 nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2442
2443 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2444 (u32)PCI_FUNC(nesdev->pcidev->devfn) << NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2445
2446 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
2447 nes_arp_table(nesdev, le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2448 NES_ARP_RESOLVE) << 16);
2449
2450 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2451 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2452
2453 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2454
2455 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2456 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2457 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2458
2459 memset(&nes_quad, 0, sizeof(nes_quad));
2460 nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2461 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2462 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2463 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2464
2465 /* Produce hash key */
2466 crc_value = get_crc_value(&nes_quad);
2467 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2468 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2469 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2470
2471 nesqp->hte_index &= adapter->hte_index_mask;
2472 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2473
2474 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2475
2476 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = 0x%08X:0x%04X,"
2477 " rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + private data length=%zu.\n",
2478 nesqp->hwqp.qp_id,
2479 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2480 ntohs(cm_id->remote_addr.sin_port),
2481 ntohl(cm_id->local_addr.sin_addr.s_addr),
2482 ntohs(cm_id->local_addr.sin_port),
2483 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2484 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2485 conn_param->private_data_len+sizeof(struct ietf_mpa_frame));
2486
2487 attr.qp_state = IB_QPS_RTS;
2488 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2489
2490 /* notify OF layer that accept event was successfull */
2491 cm_id->add_ref(cm_id);
2492
2493 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2494 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2495 cm_event.provider_data = (void *)nesqp;
2496 cm_event.local_addr = cm_id->local_addr;
2497 cm_event.remote_addr = cm_id->remote_addr;
2498 cm_event.private_data = NULL;
2499 cm_event.private_data_len = 0;
2500 ret = cm_id->event_handler(cm_id, &cm_event);
2501 if (cm_node->loopbackpartner) {
2502 cm_node->loopbackpartner->mpa_frame_size = nesqp->private_data_len;
2503 /* copy entire MPA frame to our cm_node's frame */
2504 memcpy(cm_node->loopbackpartner->mpa_frame_buf, nesqp->ietf_frame->priv_data,
2505 nesqp->private_data_len);
2506 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2507 }
2508 if (ret)
2509 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
2510 __FUNCTION__, __LINE__, ret);
2511
2512 return 0;
2513 }
2514
2515
2516 /**
2517 * nes_reject
2518 */
2519 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2520 {
2521 struct nes_cm_node *cm_node;
2522 struct nes_cm_core *cm_core;
2523
2524 atomic_inc(&cm_rejects);
2525 cm_node = (struct nes_cm_node *) cm_id->provider_data;
2526 cm_core = cm_node->cm_core;
2527 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2528
2529 strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
2530 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2531
2532 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2533 cm_node->mpa_frame.rev = mpa_version;
2534 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2535
2536 cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2537
2538 return 0;
2539 }
2540
2541
2542 /**
2543 * nes_connect
2544 * setup and launch cm connect node
2545 */
2546 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2547 {
2548 struct ib_qp *ibqp;
2549 struct nes_qp *nesqp;
2550 struct nes_vnic *nesvnic;
2551 struct nes_device *nesdev;
2552 struct nes_cm_node *cm_node;
2553 struct nes_cm_info cm_info;
2554
2555 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2556 if (!ibqp)
2557 return -EINVAL;
2558 nesqp = to_nesqp(ibqp);
2559 if (!nesqp)
2560 return -EINVAL;
2561 nesvnic = to_nesvnic(nesqp->ibqp.device);
2562 if (!nesvnic)
2563 return -EINVAL;
2564 nesdev = nesvnic->nesdev;
2565 if (!nesdev)
2566 return -EINVAL;
2567
2568 atomic_inc(&cm_connects);
2569
2570 nesqp->ietf_frame = kzalloc(sizeof(struct ietf_mpa_frame) +
2571 conn_param->private_data_len, GFP_KERNEL);
2572 if (!nesqp->ietf_frame)
2573 return -ENOMEM;
2574
2575 /* set qp as having an active connection */
2576 nesqp->active_conn = 1;
2577
2578 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = 0x%08X:0x%04X.\n",
2579 nesqp->hwqp.qp_id,
2580 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2581 ntohs(cm_id->remote_addr.sin_port),
2582 ntohl(cm_id->local_addr.sin_addr.s_addr),
2583 ntohs(cm_id->local_addr.sin_port));
2584
2585 /* cache the cm_id in the qp */
2586 nesqp->cm_id = cm_id;
2587
2588 cm_id->provider_data = nesqp;
2589
2590 /* copy the private data */
2591 if (conn_param->private_data_len) {
2592 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2593 conn_param->private_data_len);
2594 }
2595
2596 nesqp->private_data_len = conn_param->private_data_len;
2597 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2598 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
2599 nes_debug(NES_DBG_CM, "mpa private data len =%u\n", conn_param->private_data_len);
2600
2601 strcpy(&nesqp->ietf_frame->key[0], IEFT_MPA_KEY_REQ);
2602 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2603 nesqp->ietf_frame->rev = IETF_MPA_VERSION;
2604 nesqp->ietf_frame->priv_data_len = htons(conn_param->private_data_len);
2605
2606 if (cm_id->local_addr.sin_addr.s_addr != cm_id->remote_addr.sin_addr.s_addr)
2607 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2608 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2609
2610 /* set up the connection params for the node */
2611 cm_info.loc_addr = (cm_id->local_addr.sin_addr.s_addr);
2612 cm_info.loc_port = (cm_id->local_addr.sin_port);
2613 cm_info.rem_addr = (cm_id->remote_addr.sin_addr.s_addr);
2614 cm_info.rem_port = (cm_id->remote_addr.sin_port);
2615 cm_info.cm_id = cm_id;
2616 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2617
2618 cm_id->add_ref(cm_id);
2619 nes_add_ref(&nesqp->ibqp);
2620
2621 /* create a connect CM node connection */
2622 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic, nesqp->ietf_frame, &cm_info);
2623 if (!cm_node) {
2624 if (cm_id->local_addr.sin_addr.s_addr != cm_id->remote_addr.sin_addr.s_addr)
2625 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2626 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
2627 nes_rem_ref(&nesqp->ibqp);
2628 kfree(nesqp->ietf_frame);
2629 nesqp->ietf_frame = NULL;
2630 cm_id->rem_ref(cm_id);
2631 return -ENOMEM;
2632 }
2633
2634 cm_node->apbvt_set = 1;
2635 nesqp->cm_node = cm_node;
2636
2637 return 0;
2638 }
2639
2640
2641 /**
2642 * nes_create_listen
2643 */
2644 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
2645 {
2646 struct nes_vnic *nesvnic;
2647 struct nes_cm_listener *cm_node;
2648 struct nes_cm_info cm_info;
2649 struct nes_adapter *adapter;
2650 int err;
2651
2652
2653 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
2654 cm_id, ntohs(cm_id->local_addr.sin_port));
2655
2656 nesvnic = to_nesvnic(cm_id->device);
2657 if (!nesvnic)
2658 return -EINVAL;
2659 adapter = nesvnic->nesdev->nesadapter;
2660 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2661 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2662
2663 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
2664 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
2665
2666 /* setup listen params in our api call struct */
2667 cm_info.loc_addr = nesvnic->local_ipaddr;
2668 cm_info.loc_port = cm_id->local_addr.sin_port;
2669 cm_info.backlog = backlog;
2670 cm_info.cm_id = cm_id;
2671
2672 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2673
2674
2675 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
2676 if (!cm_node) {
2677 printk("%s[%u] Error returned from listen API call\n",
2678 __FUNCTION__, __LINE__);
2679 return -ENOMEM;
2680 }
2681
2682 cm_id->provider_data = cm_node;
2683
2684 if (!cm_node->reused_node) {
2685 err = nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2686 PCI_FUNC(nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2687 if (err) {
2688 printk("nes_manage_apbvt call returned %d.\n", err);
2689 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
2690 return err;
2691 }
2692 cm_listens_created++;
2693 }
2694
2695 cm_id->add_ref(cm_id);
2696 cm_id->provider_data = (void *)cm_node;
2697
2698
2699 return 0;
2700 }
2701
2702
2703 /**
2704 * nes_destroy_listen
2705 */
2706 int nes_destroy_listen(struct iw_cm_id *cm_id)
2707 {
2708 if (cm_id->provider_data)
2709 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
2710 else
2711 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
2712
2713 cm_id->rem_ref(cm_id);
2714
2715 return 0;
2716 }
2717
2718
2719 /**
2720 * nes_cm_recv
2721 */
2722 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
2723 {
2724 cm_packets_received++;
2725 if ((g_cm_core) && (g_cm_core->api)) {
2726 g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
2727 } else {
2728 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
2729 " cm is not setup properly.\n");
2730 }
2731
2732 return 0;
2733 }
2734
2735
2736 /**
2737 * nes_cm_start
2738 * Start and init a cm core module
2739 */
2740 int nes_cm_start(void)
2741 {
2742 nes_debug(NES_DBG_CM, "\n");
2743 /* create the primary CM core, pass this handle to subsequent core inits */
2744 g_cm_core = nes_cm_alloc_core();
2745 if (g_cm_core) {
2746 return 0;
2747 } else {
2748 return -ENOMEM;
2749 }
2750 }
2751
2752
2753 /**
2754 * nes_cm_stop
2755 * stop and dealloc all cm core instances
2756 */
2757 int nes_cm_stop(void)
2758 {
2759 g_cm_core->api->destroy_cm_core(g_cm_core);
2760 return 0;
2761 }
2762
2763
2764 /**
2765 * cm_event_connected
2766 * handle a connected event, setup QPs and HW
2767 */
2768 static void cm_event_connected(struct nes_cm_event *event)
2769 {
2770 u64 u64temp;
2771 struct nes_qp *nesqp;
2772 struct nes_vnic *nesvnic;
2773 struct nes_device *nesdev;
2774 struct nes_cm_node *cm_node;
2775 struct nes_adapter *nesadapter;
2776 struct ib_qp_attr attr;
2777 struct iw_cm_id *cm_id;
2778 struct iw_cm_event cm_event;
2779 struct nes_hw_qp_wqe *wqe;
2780 struct nes_v4_quad nes_quad;
2781 u32 crc_value;
2782 int ret;
2783
2784 /* get all our handles */
2785 cm_node = event->cm_node;
2786 cm_id = cm_node->cm_id;
2787 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
2788 nesqp = (struct nes_qp *)cm_id->provider_data;
2789 nesvnic = to_nesvnic(nesqp->ibqp.device);
2790 nesdev = nesvnic->nesdev;
2791 nesadapter = nesdev->nesadapter;
2792
2793 if (nesqp->destroyed) {
2794 return;
2795 }
2796 atomic_inc(&cm_connecteds);
2797 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
2798 " local port 0x%04X. jiffies = %lu.\n",
2799 nesqp->hwqp.qp_id,
2800 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2801 ntohs(cm_id->remote_addr.sin_port),
2802 ntohs(cm_id->local_addr.sin_port),
2803 jiffies);
2804
2805 nes_cm_init_tsa_conn(nesqp, cm_node);
2806
2807 /* set the QP tsa context */
2808 nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2809 nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2810 nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2811
2812 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2813 (u32)PCI_FUNC(nesdev->pcidev->devfn) << NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2814 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
2815 nes_arp_table(nesdev, le32_to_cpu(nesqp->nesqp_context->ip0),
2816 NULL, NES_ARP_RESOLVE) << 16);
2817 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2818 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2819 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2820 nesqp->nesqp_context->ird_ord_sizes |=
2821 cpu_to_le32((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
2822
2823 /* Adjust tail for not having a LSMM */
2824 nesqp->hwqp.sq_tail = 1;
2825
2826 #if defined(NES_SEND_FIRST_WRITE)
2827 if (cm_node->send_write0) {
2828 nes_debug(NES_DBG_CM, "Sending first write.\n");
2829 wqe = &nesqp->hwqp.sq_vbase[0];
2830 u64temp = (unsigned long)nesqp;
2831 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2832 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2833 u64temp);
2834 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
2835 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
2836 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
2837 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
2838 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
2839 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2840
2841 /* use the reserved spot on the WQ for the extra first WQE */
2842 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2843 NES_QPCONTEXT_ORDIRD_WRPDU | NES_QPCONTEXT_ORDIRD_ALSMM));
2844 nesqp->skip_lsmm = 1;
2845 nesqp->hwqp.sq_tail = 0;
2846 nes_write32(nesdev->regs + NES_WQE_ALLOC,
2847 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
2848 }
2849 #endif
2850
2851 memset(&nes_quad, 0, sizeof(nes_quad));
2852
2853 nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2854 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2855 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2856 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2857
2858 /* Produce hash key */
2859 crc_value = get_crc_value(&nes_quad);
2860 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2861 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
2862 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
2863
2864 nesqp->hte_index &= nesadapter->hte_index_mask;
2865 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2866
2867 nesqp->ietf_frame = &cm_node->mpa_frame;
2868 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
2869 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2870
2871 /* modify QP state to rts */
2872 attr.qp_state = IB_QPS_RTS;
2873 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2874
2875 /* notify OF layer we successfully created the requested connection */
2876 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
2877 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2878 cm_event.provider_data = cm_id->provider_data;
2879 cm_event.local_addr.sin_family = AF_INET;
2880 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
2881 cm_event.remote_addr = cm_id->remote_addr;
2882
2883 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
2884 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
2885
2886 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
2887 ret = cm_id->event_handler(cm_id, &cm_event);
2888 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2889
2890 if (ret)
2891 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
2892 __FUNCTION__, __LINE__, ret);
2893 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = %lu\n",
2894 nesqp->hwqp.qp_id, jiffies );
2895
2896 nes_rem_ref(&nesqp->ibqp);
2897
2898 return;
2899 }
2900
2901
2902 /**
2903 * cm_event_connect_error
2904 */
2905 static void cm_event_connect_error(struct nes_cm_event *event)
2906 {
2907 struct nes_qp *nesqp;
2908 struct iw_cm_id *cm_id;
2909 struct iw_cm_event cm_event;
2910 /* struct nes_cm_info cm_info; */
2911 int ret;
2912
2913 if (!event->cm_node)
2914 return;
2915
2916 cm_id = event->cm_node->cm_id;
2917 if (!cm_id) {
2918 return;
2919 }
2920
2921 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
2922 nesqp = cm_id->provider_data;
2923
2924 if (!nesqp) {
2925 return;
2926 }
2927
2928 /* notify OF layer about this connection error event */
2929 /* cm_id->rem_ref(cm_id); */
2930 nesqp->cm_id = NULL;
2931 cm_id->provider_data = NULL;
2932 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
2933 cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
2934 cm_event.provider_data = cm_id->provider_data;
2935 cm_event.local_addr = cm_id->local_addr;
2936 cm_event.remote_addr = cm_id->remote_addr;
2937 cm_event.private_data = NULL;
2938 cm_event.private_data_len = 0;
2939
2940 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remove_addr=%08x\n",
2941 cm_event.local_addr.sin_addr.s_addr, cm_event.remote_addr.sin_addr.s_addr);
2942
2943 ret = cm_id->event_handler(cm_id, &cm_event);
2944 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2945 if (ret)
2946 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
2947 __FUNCTION__, __LINE__, ret);
2948 nes_rem_ref(&nesqp->ibqp);
2949 cm_id->rem_ref(cm_id);
2950
2951 return;
2952 }
2953
2954
2955 /**
2956 * cm_event_reset
2957 */
2958 static void cm_event_reset(struct nes_cm_event *event)
2959 {
2960 struct nes_qp *nesqp;
2961 struct iw_cm_id *cm_id;
2962 struct iw_cm_event cm_event;
2963 /* struct nes_cm_info cm_info; */
2964 int ret;
2965
2966 if (!event->cm_node)
2967 return;
2968
2969 if (!event->cm_node->cm_id)
2970 return;
2971
2972 cm_id = event->cm_node->cm_id;
2973
2974 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
2975 nesqp = cm_id->provider_data;
2976
2977 nesqp->cm_id = NULL;
2978 /* cm_id->provider_data = NULL; */
2979 cm_event.event = IW_CM_EVENT_DISCONNECT;
2980 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2981 cm_event.provider_data = cm_id->provider_data;
2982 cm_event.local_addr = cm_id->local_addr;
2983 cm_event.remote_addr = cm_id->remote_addr;
2984 cm_event.private_data = NULL;
2985 cm_event.private_data_len = 0;
2986
2987 ret = cm_id->event_handler(cm_id, &cm_event);
2988 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2989
2990
2991 /* notify OF layer about this connection error event */
2992 cm_id->rem_ref(cm_id);
2993
2994 return;
2995 }
2996
2997
2998 /**
2999 * cm_event_mpa_req
3000 */
3001 static void cm_event_mpa_req(struct nes_cm_event *event)
3002 {
3003 struct iw_cm_id *cm_id;
3004 struct iw_cm_event cm_event;
3005 int ret;
3006 struct nes_cm_node *cm_node;
3007
3008 cm_node = event->cm_node;
3009 if (!cm_node)
3010 return;
3011 cm_id = cm_node->cm_id;
3012
3013 atomic_inc(&cm_connect_reqs);
3014 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3015 cm_node, cm_id, jiffies);
3016
3017 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3018 cm_event.status = IW_CM_EVENT_STATUS_OK;
3019 cm_event.provider_data = (void *)cm_node;
3020
3021 cm_event.local_addr.sin_family = AF_INET;
3022 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3023 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3024
3025 cm_event.remote_addr.sin_family = AF_INET;
3026 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3027 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3028
3029 cm_event.private_data = cm_node->mpa_frame_buf;
3030 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3031
3032 ret = cm_id->event_handler(cm_id, &cm_event);
3033 if (ret)
3034 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
3035 __FUNCTION__, __LINE__, ret);
3036
3037 return;
3038 }
3039
3040
3041 static void nes_cm_event_handler(struct work_struct *);
3042
3043 /**
3044 * nes_cm_post_event
3045 * post an event to the cm event handler
3046 */
3047 static int nes_cm_post_event(struct nes_cm_event *event)
3048 {
3049 atomic_inc(&event->cm_node->cm_core->events_posted);
3050 add_ref_cm_node(event->cm_node);
3051 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3052 INIT_WORK(&event->event_work, nes_cm_event_handler);
3053 nes_debug(NES_DBG_CM, "queue_work, event=%p\n", event);
3054
3055 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3056
3057 nes_debug(NES_DBG_CM, "Exit\n");
3058 return 0;
3059 }
3060
3061
3062 /**
3063 * nes_cm_event_handler
3064 * worker function to handle cm events
3065 * will free instance of nes_cm_event
3066 */
3067 static void nes_cm_event_handler(struct work_struct *work)
3068 {
3069 struct nes_cm_event *event = container_of(work, struct nes_cm_event, event_work);
3070 struct nes_cm_core *cm_core;
3071
3072 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core)) {
3073 return;
3074 }
3075 cm_core = event->cm_node->cm_core;
3076 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3077 event, event->type, atomic_read(&cm_core->events_posted));
3078
3079 switch (event->type) {
3080 case NES_CM_EVENT_MPA_REQ:
3081 cm_event_mpa_req(event);
3082 nes_debug(NES_DBG_CM, "CM Event: MPA REQUEST\n");
3083 break;
3084 case NES_CM_EVENT_RESET:
3085 nes_debug(NES_DBG_CM, "CM Event: RESET\n");
3086 cm_event_reset(event);
3087 break;
3088 case NES_CM_EVENT_CONNECTED:
3089 if ((!event->cm_node->cm_id) ||
3090 (event->cm_node->state != NES_CM_STATE_TSA)) {
3091 break;
3092 }
3093 cm_event_connected(event);
3094 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3095 break;
3096 case NES_CM_EVENT_ABORTED:
3097 if ((!event->cm_node->cm_id) || (event->cm_node->state == NES_CM_STATE_TSA)) {
3098 break;
3099 }
3100 cm_event_connect_error(event);
3101 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3102 break;
3103 case NES_CM_EVENT_DROPPED_PKT:
3104 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3105 break;
3106 default:
3107 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3108 break;
3109 }
3110
3111 atomic_dec(&cm_core->events_posted);
3112 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3113 rem_ref_cm_node(cm_core, event->cm_node);
3114 kfree(event);
3115
3116 return;
3117 }
kernel source for telekom puls (alcatel/mediatek)