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