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-rw-r--r--drivers/infiniband/hw/nes/nes_cm.c3088
1 files changed, 3088 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
new file mode 100644
index 000000000000..bd5cfeaac203
--- /dev/null
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -0,0 +1,3088 @@
1/*
2 * Copyright (c) 2006 - 2008 NetEffect, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34
35#define TCPOPT_TIMESTAMP 8
36
37#include <asm/atomic.h>
38#include <linux/skbuff.h>
39#include <linux/ip.h>
40#include <linux/tcp.h>
41#include <linux/init.h>
42#include <linux/if_arp.h>
43#include <linux/notifier.h>
44#include <linux/net.h>
45#include <linux/types.h>
46#include <linux/timer.h>
47#include <linux/time.h>
48#include <linux/delay.h>
49#include <linux/etherdevice.h>
50#include <linux/netdevice.h>
51#include <linux/random.h>
52#include <linux/list.h>
53#include <linux/threads.h>
54
55#include <net/neighbour.h>
56#include <net/route.h>
57#include <net/ip_fib.h>
58
59#include "nes.h"
60
61u32 cm_packets_sent;
62u32 cm_packets_bounced;
63u32 cm_packets_dropped;
64u32 cm_packets_retrans;
65u32 cm_packets_created;
66u32 cm_packets_received;
67u32 cm_listens_created;
68u32 cm_listens_destroyed;
69u32 cm_backlog_drops;
70atomic_t cm_loopbacks;
71atomic_t cm_nodes_created;
72atomic_t cm_nodes_destroyed;
73atomic_t cm_accel_dropped_pkts;
74atomic_t cm_resets_recvd;
75
76static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
77static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
78 struct nes_vnic *, struct nes_cm_info *);
79static int add_ref_cm_node(struct nes_cm_node *);
80static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
81static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
82
83
84/* External CM API Interface */
85/* instance of function pointers for client API */
86/* set address of this instance to cm_core->cm_ops at cm_core alloc */
87static struct nes_cm_ops nes_cm_api = {
88 mini_cm_accelerated,
89 mini_cm_listen,
90 mini_cm_del_listen,
91 mini_cm_connect,
92 mini_cm_close,
93 mini_cm_accept,
94 mini_cm_reject,
95 mini_cm_recv_pkt,
96 mini_cm_dealloc_core,
97 mini_cm_get,
98 mini_cm_set
99};
100
101struct nes_cm_core *g_cm_core;
102
103atomic_t cm_connects;
104atomic_t cm_accepts;
105atomic_t cm_disconnects;
106atomic_t cm_closes;
107atomic_t cm_connecteds;
108atomic_t cm_connect_reqs;
109atomic_t cm_rejects;
110
111
112/**
113 * create_event
114 */
115static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
116 enum nes_cm_event_type type)
117{
118 struct nes_cm_event *event;
119
120 if (!cm_node->cm_id)
121 return NULL;
122
123 /* allocate an empty event */
124 event = kzalloc(sizeof(*event), GFP_ATOMIC);
125
126 if (!event)
127 return NULL;
128
129 event->type = type;
130 event->cm_node = cm_node;
131 event->cm_info.rem_addr = cm_node->rem_addr;
132 event->cm_info.loc_addr = cm_node->loc_addr;
133 event->cm_info.rem_port = cm_node->rem_port;
134 event->cm_info.loc_port = cm_node->loc_port;
135 event->cm_info.cm_id = cm_node->cm_id;
136
137 nes_debug(NES_DBG_CM, "Created event=%p, type=%u, dst_addr=%08x[%x],"
138 " src_addr=%08x[%x]\n",
139 event, type,
140 event->cm_info.loc_addr, event->cm_info.loc_port,
141 event->cm_info.rem_addr, event->cm_info.rem_port);
142
143 nes_cm_post_event(event);
144 return event;
145}
146
147
148/**
149 * send_mpa_request
150 */
151int send_mpa_request(struct nes_cm_node *cm_node)
152{
153 struct sk_buff *skb;
154 int ret;
155
156 skb = get_free_pkt(cm_node);
157 if (!skb) {
158 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
159 return -1;
160 }
161
162 /* send an MPA Request frame */
163 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
164 cm_node->mpa_frame_size, SET_ACK);
165
166 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
167 if (ret < 0) {
168 return ret;
169 }
170
171 return 0;
172}
173
174
175/**
176 * recv_mpa - process a received TCP pkt, we are expecting an
177 * IETF MPA frame
178 */
179static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len)
180{
181 struct ietf_mpa_frame *mpa_frame;
182
183 /* assume req frame is in tcp data payload */
184 if (len < sizeof(struct ietf_mpa_frame)) {
185 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
186 return -1;
187 }
188
189 mpa_frame = (struct ietf_mpa_frame *)buffer;
190 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
191
192 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
193 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
194 " complete (%x + %x != %x)\n",
195 cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len);
196 return -1;
197 }
198
199 /* copy entire MPA frame to our cm_node's frame */
200 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
201 cm_node->mpa_frame_size);
202
203 return 0;
204}
205
206
207/**
208 * handle_exception_pkt - process an exception packet.
209 * We have been in a TSA state, and we have now received SW
210 * TCP/IP traffic should be a FIN request or IP pkt with options
211 */
212static int handle_exception_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb)
213{
214 int ret = 0;
215 struct tcphdr *tcph = tcp_hdr(skb);
216
217 /* first check to see if this a FIN pkt */
218 if (tcph->fin) {
219 /* we need to ACK the FIN request */
220 send_ack(cm_node);
221
222 /* check which side we are (client/server) and set next state accordingly */
223 if (cm_node->tcp_cntxt.client)
224 cm_node->state = NES_CM_STATE_CLOSING;
225 else {
226 /* we are the server side */
227 cm_node->state = NES_CM_STATE_CLOSE_WAIT;
228 /* since this is a self contained CM we don't wait for */
229 /* an APP to close us, just send final FIN immediately */
230 ret = send_fin(cm_node, NULL);
231 cm_node->state = NES_CM_STATE_LAST_ACK;
232 }
233 } else {
234 ret = -EINVAL;
235 }
236
237 return ret;
238}
239
240
241/**
242 * form_cm_frame - get a free packet and build empty frame Use
243 * node info to build.
244 */
245struct sk_buff *form_cm_frame(struct sk_buff *skb, struct nes_cm_node *cm_node,
246 void *options, u32 optionsize, void *data, u32 datasize, u8 flags)
247{
248 struct tcphdr *tcph;
249 struct iphdr *iph;
250 struct ethhdr *ethh;
251 u8 *buf;
252 u16 packetsize = sizeof(*iph);
253
254 packetsize += sizeof(*tcph);
255 packetsize += optionsize + datasize;
256
257 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
258
259 skb->len = 0;
260 buf = skb_put(skb, packetsize + ETH_HLEN);
261
262 ethh = (struct ethhdr *) buf;
263 buf += ETH_HLEN;
264
265 iph = (struct iphdr *)buf;
266 buf += sizeof(*iph);
267 tcph = (struct tcphdr *)buf;
268 skb_reset_mac_header(skb);
269 skb_set_network_header(skb, ETH_HLEN);
270 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
271 buf += sizeof(*tcph);
272
273 skb->ip_summed = CHECKSUM_PARTIAL;
274 skb->protocol = htons(0x800);
275 skb->data_len = 0;
276 skb->mac_len = ETH_HLEN;
277
278 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
279 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
280 ethh->h_proto = htons(0x0800);
281
282 iph->version = IPVERSION;
283 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
284 iph->tos = 0;
285 iph->tot_len = htons(packetsize);
286 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
287
288 iph->frag_off = htons(0x4000);
289 iph->ttl = 0x40;
290 iph->protocol = 0x06; /* IPPROTO_TCP */
291
292 iph->saddr = htonl(cm_node->loc_addr);
293 iph->daddr = htonl(cm_node->rem_addr);
294
295 tcph->source = htons(cm_node->loc_port);
296 tcph->dest = htons(cm_node->rem_port);
297 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
298
299 if (flags & SET_ACK) {
300 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
301 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
302 tcph->ack = 1;
303 } else
304 tcph->ack_seq = 0;
305
306 if (flags & SET_SYN) {
307 cm_node->tcp_cntxt.loc_seq_num++;
308 tcph->syn = 1;
309 } else
310 cm_node->tcp_cntxt.loc_seq_num += datasize; /* data (no headers) */
311
312 if (flags & SET_FIN)
313 tcph->fin = 1;
314
315 if (flags & SET_RST)
316 tcph->rst = 1;
317
318 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
319 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
320 tcph->urg_ptr = 0;
321 if (optionsize)
322 memcpy(buf, options, optionsize);
323 buf += optionsize;
324 if (datasize)
325 memcpy(buf, data, datasize);
326
327 skb_shinfo(skb)->nr_frags = 0;
328 cm_packets_created++;
329
330 return skb;
331}
332
333
334/**
335 * print_core - dump a cm core
336 */
337static void print_core(struct nes_cm_core *core)
338{
339 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
340 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
341 if (!core)
342 return;
343 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
344 nes_debug(NES_DBG_CM, "Session ID : %u \n", atomic_read(&core->session_id));
345
346 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
347
348 nes_debug(NES_DBG_CM, "Tx Free cnt : %u \n", skb_queue_len(&core->tx_free_list));
349 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
350 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
351
352 nes_debug(NES_DBG_CM, "core : %p \n", core);
353
354 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
355}
356
357
358/**
359 * schedule_nes_timer
360 * note - cm_node needs to be protected before calling this. Encase in:
361 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
362 */
363int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
364 enum nes_timer_type type, int send_retrans,
365 int close_when_complete)
366{
367 unsigned long flags;
368 struct nes_cm_core *cm_core;
369 struct nes_timer_entry *new_send;
370 int ret = 0;
371 u32 was_timer_set;
372
373 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
374 if (!new_send)
375 return -1;
376 if (!cm_node)
377 return -EINVAL;
378
379 /* new_send->timetosend = currenttime */
380 new_send->retrycount = NES_DEFAULT_RETRYS;
381 new_send->retranscount = NES_DEFAULT_RETRANS;
382 new_send->skb = skb;
383 new_send->timetosend = jiffies;
384 new_send->type = type;
385 new_send->netdev = cm_node->netdev;
386 new_send->send_retrans = send_retrans;
387 new_send->close_when_complete = close_when_complete;
388
389 if (type == NES_TIMER_TYPE_CLOSE) {
390 new_send->timetosend += (HZ/2); /* TODO: decide on the correct value here */
391 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
392 list_add_tail(&new_send->list, &cm_node->recv_list);
393 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
394 }
395
396 if (type == NES_TIMER_TYPE_SEND) {
397 new_send->seq_num = htonl(tcp_hdr(skb)->seq);
398 atomic_inc(&new_send->skb->users);
399
400 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
401 if (ret != NETDEV_TX_OK) {
402 nes_debug(NES_DBG_CM, "Error sending packet %p (jiffies = %lu)\n",
403 new_send, jiffies);
404 atomic_dec(&new_send->skb->users);
405 new_send->timetosend = jiffies;
406 } else {
407 cm_packets_sent++;
408 if (!send_retrans) {
409 if (close_when_complete)
410 rem_ref_cm_node(cm_node->cm_core, cm_node);
411 dev_kfree_skb_any(new_send->skb);
412 kfree(new_send);
413 return ret;
414 }
415 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
416 }
417 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
418 list_add_tail(&new_send->list, &cm_node->retrans_list);
419 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
420 }
421 if (type == NES_TIMER_TYPE_RECV) {
422 new_send->seq_num = htonl(tcp_hdr(skb)->seq);
423 new_send->timetosend = jiffies;
424 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
425 list_add_tail(&new_send->list, &cm_node->recv_list);
426 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
427 }
428 cm_core = cm_node->cm_core;
429
430 was_timer_set = timer_pending(&cm_core->tcp_timer);
431
432 if (!was_timer_set) {
433 cm_core->tcp_timer.expires = new_send->timetosend;
434 add_timer(&cm_core->tcp_timer);
435 }
436
437 return ret;
438}
439
440
441/**
442 * nes_cm_timer_tick
443 */
444void nes_cm_timer_tick(unsigned long pass)
445{
446 unsigned long flags, qplockflags;
447 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
448 struct iw_cm_id *cm_id;
449 struct nes_cm_node *cm_node;
450 struct nes_timer_entry *send_entry, *recv_entry;
451 struct list_head *list_core, *list_core_temp;
452 struct list_head *list_node, *list_node_temp;
453 struct nes_cm_core *cm_core = g_cm_core;
454 struct nes_qp *nesqp;
455 struct sk_buff *skb;
456 u32 settimer = 0;
457 int ret = NETDEV_TX_OK;
458 int node_done;
459
460 spin_lock_irqsave(&cm_core->ht_lock, flags);
461
462 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
463 cm_node = container_of(list_node, struct nes_cm_node, list);
464 add_ref_cm_node(cm_node);
465 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
466 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
467 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
468 recv_entry = container_of(list_core, struct nes_timer_entry, list);
469 if ((time_after(recv_entry->timetosend, jiffies)) &&
470 (recv_entry->type == NES_TIMER_TYPE_CLOSE)) {
471 if (nexttimeout > recv_entry->timetosend || !settimer) {
472 nexttimeout = recv_entry->timetosend;
473 settimer = 1;
474 }
475 continue;
476 }
477 list_del(&recv_entry->list);
478 cm_id = cm_node->cm_id;
479 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
480 if (recv_entry->type == NES_TIMER_TYPE_CLOSE) {
481 nesqp = (struct nes_qp *)recv_entry->skb;
482 spin_lock_irqsave(&nesqp->lock, qplockflags);
483 if (nesqp->cm_id) {
484 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, refcount = %d: "
485 "****** HIT A NES_TIMER_TYPE_CLOSE"
486 " with something to do!!! ******\n",
487 nesqp->hwqp.qp_id, cm_id,
488 atomic_read(&nesqp->refcount));
489 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
490 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
491 nesqp->ibqp_state = IB_QPS_ERR;
492 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
493 nes_cm_disconn(nesqp);
494 } else {
495 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
496 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, refcount = %d:"
497 " ****** HIT A NES_TIMER_TYPE_CLOSE"
498 " with nothing to do!!! ******\n",
499 nesqp->hwqp.qp_id, cm_id,
500 atomic_read(&nesqp->refcount));
501 nes_rem_ref(&nesqp->ibqp);
502 }
503 if (cm_id)
504 cm_id->rem_ref(cm_id);
505 }
506 kfree(recv_entry);
507 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
508 }
509 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
510
511 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
512 node_done = 0;
513 list_for_each_safe(list_core, list_node_temp, &cm_node->retrans_list) {
514 if (node_done) {
515 break;
516 }
517 send_entry = container_of(list_core, struct nes_timer_entry, list);
518 if (time_after(send_entry->timetosend, jiffies)) {
519 if (cm_node->state != NES_CM_STATE_TSA) {
520 if ((nexttimeout > send_entry->timetosend) || !settimer) {
521 nexttimeout = send_entry->timetosend;
522 settimer = 1;
523 }
524 node_done = 1;
525 continue;
526 } else {
527 list_del(&send_entry->list);
528 skb = send_entry->skb;
529 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
530 dev_kfree_skb_any(skb);
531 kfree(send_entry);
532 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
533 continue;
534 }
535 }
536 if (send_entry->type == NES_TIMER_NODE_CLEANUP) {
537 list_del(&send_entry->list);
538 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
539 kfree(send_entry);
540 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
541 continue;
542 }
543 if ((send_entry->seq_num < cm_node->tcp_cntxt.rem_ack_num) ||
544 (cm_node->state == NES_CM_STATE_TSA) ||
545 (cm_node->state == NES_CM_STATE_CLOSED)) {
546 skb = send_entry->skb;
547 list_del(&send_entry->list);
548 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
549 kfree(send_entry);
550 dev_kfree_skb_any(skb);
551 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
552 continue;
553 }
554
555 if (!send_entry->retranscount || !send_entry->retrycount) {
556 cm_packets_dropped++;
557 skb = send_entry->skb;
558 list_del(&send_entry->list);
559 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
560 dev_kfree_skb_any(skb);
561 kfree(send_entry);
562 if (cm_node->state == NES_CM_STATE_SYN_RCVD) {
563 /* this node never even generated an indication up to the cm */
564 rem_ref_cm_node(cm_core, cm_node);
565 } else {
566 cm_node->state = NES_CM_STATE_CLOSED;
567 create_event(cm_node, NES_CM_EVENT_ABORTED);
568 }
569 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
570 continue;
571 }
572 /* this seems like the correct place, but leave send entry unprotected */
573 // spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
574 atomic_inc(&send_entry->skb->users);
575 cm_packets_retrans++;
576 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p for node %p,"
577 " jiffies = %lu, time to send = %lu, retranscount = %u, "
578 "send_entry->seq_num = 0x%08X, cm_node->tcp_cntxt.rem_ack_num = 0x%08X\n",
579 send_entry, cm_node, jiffies, send_entry->timetosend, send_entry->retranscount,
580 send_entry->seq_num, cm_node->tcp_cntxt.rem_ack_num);
581
582 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
583 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
584 if (ret != NETDEV_TX_OK) {
585 cm_packets_bounced++;
586 atomic_dec(&send_entry->skb->users);
587 send_entry->retrycount--;
588 nexttimeout = jiffies + NES_SHORT_TIME;
589 settimer = 1;
590 node_done = 1;
591 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
592 continue;
593 } else {
594 cm_packets_sent++;
595 }
596 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
597 list_del(&send_entry->list);
598 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = %u, retry count = %u.\n",
599 send_entry->retranscount, send_entry->retrycount);
600 if (send_entry->send_retrans) {
601 send_entry->retranscount--;
602 send_entry->timetosend = jiffies + NES_RETRY_TIMEOUT;
603 if (nexttimeout > send_entry->timetosend || !settimer) {
604 nexttimeout = send_entry->timetosend;
605 settimer = 1;
606 }
607 list_add(&send_entry->list, &cm_node->retrans_list);
608 continue;
609 } else {
610 int close_when_complete;
611 skb = send_entry->skb;
612 close_when_complete = send_entry->close_when_complete;
613 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
614 if (close_when_complete) {
615 BUG_ON(atomic_read(&cm_node->ref_count) == 1);
616 rem_ref_cm_node(cm_core, cm_node);
617 }
618 dev_kfree_skb_any(skb);
619 kfree(send_entry);
620 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
621 continue;
622 }
623 }
624 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
625
626 rem_ref_cm_node(cm_core, cm_node);
627
628 spin_lock_irqsave(&cm_core->ht_lock, flags);
629 if (ret != NETDEV_TX_OK)
630 break;
631 }
632 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
633
634 if (settimer) {
635 if (!timer_pending(&cm_core->tcp_timer)) {
636 cm_core->tcp_timer.expires = nexttimeout;
637 add_timer(&cm_core->tcp_timer);
638 }
639 }
640}
641
642
643/**
644 * send_syn
645 */
646int send_syn(struct nes_cm_node *cm_node, u32 sendack)
647{
648 int ret;
649 int flags = SET_SYN;
650 struct sk_buff *skb;
651 char optionsbuffer[sizeof(struct option_mss) +
652 sizeof(struct option_windowscale) +
653 sizeof(struct option_base) + 1];
654
655 int optionssize = 0;
656 /* Sending MSS option */
657 union all_known_options *options;
658
659 if (!cm_node)
660 return -EINVAL;
661
662 options = (union all_known_options *)&optionsbuffer[optionssize];
663 options->as_mss.optionnum = OPTION_NUMBER_MSS;
664 options->as_mss.length = sizeof(struct option_mss);
665 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
666 optionssize += sizeof(struct option_mss);
667
668 options = (union all_known_options *)&optionsbuffer[optionssize];
669 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
670 options->as_windowscale.length = sizeof(struct option_windowscale);
671 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
672 optionssize += sizeof(struct option_windowscale);
673
674 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)
675 ) {
676 options = (union all_known_options *)&optionsbuffer[optionssize];
677 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
678 options->as_base.length = sizeof(struct option_base);
679 optionssize += sizeof(struct option_base);
680 /* we need the size to be a multiple of 4 */
681 options = (union all_known_options *)&optionsbuffer[optionssize];
682 options->as_end = 1;
683 optionssize += 1;
684 options = (union all_known_options *)&optionsbuffer[optionssize];
685 options->as_end = 1;
686 optionssize += 1;
687 }
688
689 options = (union all_known_options *)&optionsbuffer[optionssize];
690 options->as_end = OPTION_NUMBER_END;
691 optionssize += 1;
692
693 skb = get_free_pkt(cm_node);
694 if (!skb) {
695 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
696 return -1;
697 }
698
699 if (sendack)
700 flags |= SET_ACK;
701
702 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
703 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
704
705 return ret;
706}
707
708
709/**
710 * send_reset
711 */
712int send_reset(struct nes_cm_node *cm_node)
713{
714 int ret;
715 struct sk_buff *skb = get_free_pkt(cm_node);
716 int flags = SET_RST | SET_ACK;
717
718 if (!skb) {
719 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
720 return -1;
721 }
722
723 add_ref_cm_node(cm_node);
724 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
725 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
726
727 return ret;
728}
729
730
731/**
732 * send_ack
733 */
734int send_ack(struct nes_cm_node *cm_node)
735{
736 int ret;
737 struct sk_buff *skb = get_free_pkt(cm_node);
738
739 if (!skb) {
740 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
741 return -1;
742 }
743
744 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
745 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
746
747 return ret;
748}
749
750
751/**
752 * send_fin
753 */
754int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
755{
756 int ret;
757
758 /* if we didn't get a frame get one */
759 if (!skb)
760 skb = get_free_pkt(cm_node);
761
762 if (!skb) {
763 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
764 return -1;
765 }
766
767 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
768 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
769
770 return ret;
771}
772
773
774/**
775 * get_free_pkt
776 */
777struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node)
778{
779 struct sk_buff *skb, *new_skb;
780
781 /* check to see if we need to repopulate the free tx pkt queue */
782 if (skb_queue_len(&cm_node->cm_core->tx_free_list) < NES_CM_FREE_PKT_LO_WATERMARK) {
783 while (skb_queue_len(&cm_node->cm_core->tx_free_list) <
784 cm_node->cm_core->free_tx_pkt_max) {
785 /* replace the frame we took, we won't get it back */
786 new_skb = dev_alloc_skb(cm_node->cm_core->mtu);
787 BUG_ON(!new_skb);
788 /* add a replacement frame to the free tx list head */
789 skb_queue_head(&cm_node->cm_core->tx_free_list, new_skb);
790 }
791 }
792
793 skb = skb_dequeue(&cm_node->cm_core->tx_free_list);
794
795 return skb;
796}
797
798
799/**
800 * make_hashkey - generate hash key from node tuple
801 */
802static inline int make_hashkey(u16 loc_port, nes_addr_t loc_addr, u16 rem_port,
803 nes_addr_t rem_addr)
804{
805 u32 hashkey = 0;
806
807 hashkey = loc_addr + rem_addr + loc_port + rem_port;
808 hashkey = (hashkey % NES_CM_HASHTABLE_SIZE);
809
810 return hashkey;
811}
812
813
814/**
815 * find_node - find a cm node that matches the reference cm node
816 */
817static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
818 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
819{
820 unsigned long flags;
821 u32 hashkey;
822 struct list_head *list_pos;
823 struct list_head *hte;
824 struct nes_cm_node *cm_node;
825
826 /* make a hash index key for this packet */
827 hashkey = make_hashkey(loc_port, loc_addr, rem_port, rem_addr);
828
829 /* get a handle on the hte */
830 hte = &cm_core->connected_nodes;
831
832 nes_debug(NES_DBG_CM, "Searching for an owner node:%x:%x from core %p->%p\n",
833 loc_addr, loc_port, cm_core, hte);
834
835 /* walk list and find cm_node associated with this session ID */
836 spin_lock_irqsave(&cm_core->ht_lock, flags);
837 list_for_each(list_pos, hte) {
838 cm_node = container_of(list_pos, struct nes_cm_node, list);
839 /* compare quad, return node handle if a match */
840 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
841 cm_node->loc_addr, cm_node->loc_port,
842 loc_addr, loc_port,
843 cm_node->rem_addr, cm_node->rem_port,
844 rem_addr, rem_port);
845 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
846 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
847 add_ref_cm_node(cm_node);
848 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
849 return cm_node;
850 }
851 }
852 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
853
854 /* no owner node */
855 return NULL;
856}
857
858
859/**
860 * find_listener - find a cm node listening on this addr-port pair
861 */
862static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
863 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
864{
865 unsigned long flags;
866 struct list_head *listen_list;
867 struct nes_cm_listener *listen_node;
868
869 /* walk list and find cm_node associated with this session ID */
870 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
871 list_for_each(listen_list, &cm_core->listen_list.list) {
872 listen_node = container_of(listen_list, struct nes_cm_listener, list);
873 /* compare node pair, return node handle if a match */
874 if (((listen_node->loc_addr == dst_addr) ||
875 listen_node->loc_addr == 0x00000000) &&
876 (listen_node->loc_port == dst_port) &&
877 (listener_state & listen_node->listener_state)) {
878 atomic_inc(&listen_node->ref_count);
879 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
880 return listen_node;
881 }
882 }
883 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
884
885 nes_debug(NES_DBG_CM, "Unable to find listener- %x:%x\n",
886 dst_addr, dst_port);
887
888 /* no listener */
889 return NULL;
890}
891
892
893/**
894 * add_hte_node - add a cm node to the hash table
895 */
896static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
897{
898 unsigned long flags;
899 u32 hashkey;
900 struct list_head *hte;
901
902 if (!cm_node || !cm_core)
903 return -EINVAL;
904
905 nes_debug(NES_DBG_CM, "Adding Node to Active Connection HT\n");
906
907 /* first, make an index into our hash table */
908 hashkey = make_hashkey(cm_node->loc_port, cm_node->loc_addr,
909 cm_node->rem_port, cm_node->rem_addr);
910 cm_node->hashkey = hashkey;
911
912 spin_lock_irqsave(&cm_core->ht_lock, flags);
913
914 /* get a handle on the hash table element (list head for this slot) */
915 hte = &cm_core->connected_nodes;
916 list_add_tail(&cm_node->list, hte);
917 atomic_inc(&cm_core->ht_node_cnt);
918
919 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
920
921 return 0;
922}
923
924
925/**
926 * mini_cm_dec_refcnt_listen
927 */
928static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
929 struct nes_cm_listener *listener, int free_hanging_nodes)
930{
931 int ret = 1;
932 unsigned long flags;
933 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
934 if (!atomic_dec_return(&listener->ref_count)) {
935 list_del(&listener->list);
936
937 /* decrement our listen node count */
938 atomic_dec(&cm_core->listen_node_cnt);
939
940 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
941
942 if (listener->nesvnic) {
943 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
944 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
945 }
946
947 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
948
949 kfree(listener);
950 ret = 0;
951 cm_listens_destroyed++;
952 } else {
953 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
954 }
955 if (listener) {
956 if (atomic_read(&listener->pend_accepts_cnt) > 0)
957 nes_debug(NES_DBG_CM, "destroying listener (%p)"
958 " with non-zero pending accepts=%u\n",
959 listener, atomic_read(&listener->pend_accepts_cnt));
960 }
961
962 return ret;
963}
964
965
966/**
967 * mini_cm_del_listen
968 */
969static int mini_cm_del_listen(struct nes_cm_core *cm_core,
970 struct nes_cm_listener *listener)
971{
972 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
973 listener->cm_id = NULL; /* going to be destroyed pretty soon */
974 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
975}
976
977
978/**
979 * mini_cm_accelerated
980 */
981static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
982 struct nes_cm_node *cm_node)
983{
984 u32 was_timer_set;
985 cm_node->accelerated = 1;
986
987 if (cm_node->accept_pend) {
988 BUG_ON(!cm_node->listener);
989 atomic_dec(&cm_node->listener->pend_accepts_cnt);
990 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
991 }
992
993 was_timer_set = timer_pending(&cm_core->tcp_timer);
994 if (!was_timer_set) {
995 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
996 add_timer(&cm_core->tcp_timer);
997 }
998
999 return 0;
1000}
1001
1002
1003/**
1004 * nes_addr_send_arp
1005 */
1006static void nes_addr_send_arp(u32 dst_ip)
1007{
1008 struct rtable *rt;
1009 struct flowi fl;
1010
1011 memset(&fl, 0, sizeof fl);
1012 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1013 if (ip_route_output_key(&init_net, &rt, &fl)) {
1014 printk("%s: ip_route_output_key failed for 0x%08X\n",
1015 __FUNCTION__, dst_ip);
1016 return;
1017 }
1018
1019 neigh_event_send(rt->u.dst.neighbour, NULL);
1020 ip_rt_put(rt);
1021}
1022
1023
1024/**
1025 * make_cm_node - create a new instance of a cm node
1026 */
1027static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1028 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1029 struct nes_cm_listener *listener)
1030{
1031 struct nes_cm_node *cm_node;
1032 struct timespec ts;
1033 int arpindex = 0;
1034 struct nes_device *nesdev;
1035 struct nes_adapter *nesadapter;
1036
1037 /* create an hte and cm_node for this instance */
1038 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1039 if (!cm_node)
1040 return NULL;
1041
1042 /* set our node specific transport info */
1043 cm_node->loc_addr = cm_info->loc_addr;
1044 cm_node->rem_addr = cm_info->rem_addr;
1045 cm_node->loc_port = cm_info->loc_port;
1046 cm_node->rem_port = cm_info->rem_port;
1047 cm_node->send_write0 = send_first;
1048 nes_debug(NES_DBG_CM, "Make node addresses : loc = %x:%x, rem = %x:%x\n",
1049 cm_node->loc_addr, cm_node->loc_port, cm_node->rem_addr, cm_node->rem_port);
1050 cm_node->listener = listener;
1051 cm_node->netdev = nesvnic->netdev;
1052 cm_node->cm_id = cm_info->cm_id;
1053 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1054
1055 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n",
1056 cm_node->listener, cm_node->cm_id);
1057
1058 INIT_LIST_HEAD(&cm_node->retrans_list);
1059 spin_lock_init(&cm_node->retrans_list_lock);
1060 INIT_LIST_HEAD(&cm_node->recv_list);
1061 spin_lock_init(&cm_node->recv_list_lock);
1062
1063 cm_node->loopbackpartner = NULL;
1064 atomic_set(&cm_node->ref_count, 1);
1065 /* associate our parent CM core */
1066 cm_node->cm_core = cm_core;
1067 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1068 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1069 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1070 NES_CM_DEFAULT_RCV_WND_SCALE;
1071 ts = current_kernel_time();
1072 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1073 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1074 sizeof(struct tcphdr) - ETH_HLEN;
1075 cm_node->tcp_cntxt.rcv_nxt = 0;
1076 /* get a unique session ID , add thread_id to an upcounter to handle race */
1077 atomic_inc(&cm_core->node_cnt);
1078 atomic_inc(&cm_core->session_id);
1079 cm_node->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid);
1080 cm_node->conn_type = cm_info->conn_type;
1081 cm_node->apbvt_set = 0;
1082 cm_node->accept_pend = 0;
1083
1084 cm_node->nesvnic = nesvnic;
1085 /* get some device handles, for arp lookup */
1086 nesdev = nesvnic->nesdev;
1087 nesadapter = nesdev->nesadapter;
1088
1089 cm_node->loopbackpartner = NULL;
1090 /* get the mac addr for the remote node */
1091 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1092 if (arpindex < 0) {
1093 kfree(cm_node);
1094 nes_addr_send_arp(cm_info->rem_addr);
1095 return NULL;
1096 }
1097
1098 /* copy the mac addr to node context */
1099 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1100 nes_debug(NES_DBG_CM, "Remote mac addr from arp table:%02x,"
1101 " %02x, %02x, %02x, %02x, %02x\n",
1102 cm_node->rem_mac[0], cm_node->rem_mac[1],
1103 cm_node->rem_mac[2], cm_node->rem_mac[3],
1104 cm_node->rem_mac[4], cm_node->rem_mac[5]);
1105
1106 add_hte_node(cm_core, cm_node);
1107 atomic_inc(&cm_nodes_created);
1108
1109 return cm_node;
1110}
1111
1112
1113/**
1114 * add_ref_cm_node - destroy an instance of a cm node
1115 */
1116static int add_ref_cm_node(struct nes_cm_node *cm_node)
1117{
1118 atomic_inc(&cm_node->ref_count);
1119 return 0;
1120}
1121
1122
1123/**
1124 * rem_ref_cm_node - destroy an instance of a cm node
1125 */
1126static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1127 struct nes_cm_node *cm_node)
1128{
1129 unsigned long flags, qplockflags;
1130 struct nes_timer_entry *send_entry;
1131 struct nes_timer_entry *recv_entry;
1132 struct iw_cm_id *cm_id;
1133 struct list_head *list_core, *list_node_temp;
1134 struct nes_qp *nesqp;
1135
1136 if (!cm_node)
1137 return -EINVAL;
1138
1139 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1140 if (atomic_dec_return(&cm_node->ref_count)) {
1141 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1142 return 0;
1143 }
1144 list_del(&cm_node->list);
1145 atomic_dec(&cm_core->ht_node_cnt);
1146 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1147
1148 /* if the node is destroyed before connection was accelerated */
1149 if (!cm_node->accelerated && cm_node->accept_pend) {
1150 BUG_ON(!cm_node->listener);
1151 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1152 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1153 }
1154
1155 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1156 list_for_each_safe(list_core, list_node_temp, &cm_node->retrans_list) {
1157 send_entry = container_of(list_core, struct nes_timer_entry, list);
1158 list_del(&send_entry->list);
1159 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1160 dev_kfree_skb_any(send_entry->skb);
1161 kfree(send_entry);
1162 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1163 continue;
1164 }
1165 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1166
1167 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1168 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
1169 recv_entry = container_of(list_core, struct nes_timer_entry, list);
1170 list_del(&recv_entry->list);
1171 cm_id = cm_node->cm_id;
1172 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1173 if (recv_entry->type == NES_TIMER_TYPE_CLOSE) {
1174 nesqp = (struct nes_qp *)recv_entry->skb;
1175 spin_lock_irqsave(&nesqp->lock, qplockflags);
1176 if (nesqp->cm_id) {
1177 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: ****** HIT A NES_TIMER_TYPE_CLOSE"
1178 " with something to do!!! ******\n",
1179 nesqp->hwqp.qp_id, cm_id);
1180 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1181 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1182 nesqp->ibqp_state = IB_QPS_ERR;
1183 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1184 nes_cm_disconn(nesqp);
1185 } else {
1186 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1187 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: ****** HIT A NES_TIMER_TYPE_CLOSE"
1188 " with nothing to do!!! ******\n",
1189 nesqp->hwqp.qp_id, cm_id);
1190 nes_rem_ref(&nesqp->ibqp);
1191 }
1192 cm_id->rem_ref(cm_id);
1193 } else if (recv_entry->type == NES_TIMER_TYPE_RECV) {
1194 dev_kfree_skb_any(recv_entry->skb);
1195 }
1196 kfree(recv_entry);
1197 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1198 }
1199 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1200
1201 if (cm_node->listener) {
1202 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1203 } else {
1204 if (cm_node->apbvt_set && cm_node->nesvnic) {
1205 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1206 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1207 NES_MANAGE_APBVT_DEL);
1208 }
1209 }
1210
1211 kfree(cm_node);
1212 atomic_dec(&cm_core->node_cnt);
1213 atomic_inc(&cm_nodes_destroyed);
1214
1215 return 0;
1216}
1217
1218
1219/**
1220 * process_options
1221 */
1222static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc, u32 optionsize, u32 syn_packet)
1223{
1224 u32 tmp;
1225 u32 offset = 0;
1226 union all_known_options *all_options;
1227 char got_mss_option = 0;
1228
1229 while (offset < optionsize) {
1230 all_options = (union all_known_options *)(optionsloc + offset);
1231 switch (all_options->as_base.optionnum) {
1232 case OPTION_NUMBER_END:
1233 offset = optionsize;
1234 break;
1235 case OPTION_NUMBER_NONE:
1236 offset += 1;
1237 continue;
1238 case OPTION_NUMBER_MSS:
1239 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d Size: %d\n",
1240 __FUNCTION__,
1241 all_options->as_mss.length, offset, optionsize);
1242 got_mss_option = 1;
1243 if (all_options->as_mss.length != 4) {
1244 return 1;
1245 } else {
1246 tmp = ntohs(all_options->as_mss.mss);
1247 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
1248 cm_node->tcp_cntxt.mss = tmp;
1249 }
1250 break;
1251 case OPTION_NUMBER_WINDOW_SCALE:
1252 cm_node->tcp_cntxt.snd_wscale = all_options->as_windowscale.shiftcount;
1253 break;
1254 case OPTION_NUMBER_WRITE0:
1255 cm_node->send_write0 = 1;
1256 break;
1257 default:
1258 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1259 all_options->as_base.optionnum);
1260 break;
1261 }
1262 offset += all_options->as_base.length;
1263 }
1264 if ((!got_mss_option) && (syn_packet))
1265 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1266 return 0;
1267}
1268
1269
1270/**
1271 * process_packet
1272 */
1273int process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1274 struct nes_cm_core *cm_core)
1275{
1276 int optionsize;
1277 int datasize;
1278 int ret = 0;
1279 struct tcphdr *tcph = tcp_hdr(skb);
1280 u32 inc_sequence;
1281 if (cm_node->state == NES_CM_STATE_SYN_SENT && tcph->syn) {
1282 inc_sequence = ntohl(tcph->seq);
1283 cm_node->tcp_cntxt.rcv_nxt = inc_sequence;
1284 }
1285
1286 if ((!tcph) || (cm_node->state == NES_CM_STATE_TSA)) {
1287 BUG_ON(!tcph);
1288 atomic_inc(&cm_accel_dropped_pkts);
1289 return -1;
1290 }
1291
1292 if (tcph->rst) {
1293 atomic_inc(&cm_resets_recvd);
1294 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u. refcnt=%d\n",
1295 cm_node, cm_node->state, atomic_read(&cm_node->ref_count));
1296 switch (cm_node->state) {
1297 case NES_CM_STATE_LISTENING:
1298 rem_ref_cm_node(cm_core, cm_node);
1299 break;
1300 case NES_CM_STATE_TSA:
1301 case NES_CM_STATE_CLOSED:
1302 break;
1303 case NES_CM_STATE_SYN_RCVD:
1304 nes_debug(NES_DBG_CM, "Received a reset for local 0x%08X:%04X,"
1305 " remote 0x%08X:%04X, node state = %u\n",
1306 cm_node->loc_addr, cm_node->loc_port,
1307 cm_node->rem_addr, cm_node->rem_port,
1308 cm_node->state);
1309 rem_ref_cm_node(cm_core, cm_node);
1310 break;
1311 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1312 case NES_CM_STATE_ESTABLISHED:
1313 case NES_CM_STATE_MPAREQ_SENT:
1314 default:
1315 nes_debug(NES_DBG_CM, "Received a reset for local 0x%08X:%04X,"
1316 " remote 0x%08X:%04X, node state = %u refcnt=%d\n",
1317 cm_node->loc_addr, cm_node->loc_port,
1318 cm_node->rem_addr, cm_node->rem_port,
1319 cm_node->state, atomic_read(&cm_node->ref_count));
1320 // create event
1321 cm_node->state = NES_CM_STATE_CLOSED;
1322
1323 create_event(cm_node, NES_CM_EVENT_ABORTED);
1324 break;
1325
1326 }
1327 return -1;
1328 }
1329
1330 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1331
1332 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1333 skb_pull(skb, tcph->doff << 2);
1334
1335 datasize = skb->len;
1336 inc_sequence = ntohl(tcph->seq);
1337 nes_debug(NES_DBG_CM, "datasize = %u, sequence = 0x%08X, ack_seq = 0x%08X,"
1338 " rcv_nxt = 0x%08X Flags: %s %s.\n",
1339 datasize, inc_sequence, ntohl(tcph->ack_seq),
1340 cm_node->tcp_cntxt.rcv_nxt, (tcph->syn ? "SYN":""),
1341 (tcph->ack ? "ACK":""));
1342
1343 if (!tcph->syn && (inc_sequence != cm_node->tcp_cntxt.rcv_nxt)
1344 ) {
1345 nes_debug(NES_DBG_CM, "dropping packet, datasize = %u, sequence = 0x%08X,"
1346 " ack_seq = 0x%08X, rcv_nxt = 0x%08X Flags: %s.\n",
1347 datasize, inc_sequence, ntohl(tcph->ack_seq),
1348 cm_node->tcp_cntxt.rcv_nxt, (tcph->ack ? "ACK":""));
1349 if (cm_node->state == NES_CM_STATE_LISTENING) {
1350 rem_ref_cm_node(cm_core, cm_node);
1351 }
1352 return -1;
1353 }
1354
1355 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1356
1357
1358 if (optionsize) {
1359 u8 *optionsloc = (u8 *)&tcph[1];
1360 if (process_options(cm_node, optionsloc, optionsize, (u32)tcph->syn)) {
1361 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n", __FUNCTION__, cm_node);
1362 send_reset(cm_node);
1363 if (cm_node->state != NES_CM_STATE_SYN_SENT)
1364 rem_ref_cm_node(cm_core, cm_node);
1365 return 0;
1366 }
1367 } else if (tcph->syn)
1368 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1369
1370 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1371 cm_node->tcp_cntxt.snd_wscale;
1372
1373 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) {
1374 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1375 }
1376
1377 if (tcph->ack) {
1378 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1379 switch (cm_node->state) {
1380 case NES_CM_STATE_SYN_RCVD:
1381 case NES_CM_STATE_SYN_SENT:
1382 /* read and stash current sequence number */
1383 if (cm_node->tcp_cntxt.rem_ack_num != cm_node->tcp_cntxt.loc_seq_num) {
1384 nes_debug(NES_DBG_CM, "ERROR - cm_node->tcp_cntxt.rem_ack_num !="
1385 " cm_node->tcp_cntxt.loc_seq_num\n");
1386 send_reset(cm_node);
1387 return 0;
1388 }
1389 if (cm_node->state == NES_CM_STATE_SYN_SENT)
1390 cm_node->state = NES_CM_STATE_ONE_SIDE_ESTABLISHED;
1391 else {
1392 cm_node->state = NES_CM_STATE_ESTABLISHED;
1393 }
1394 break;
1395 case NES_CM_STATE_LAST_ACK:
1396 cm_node->state = NES_CM_STATE_CLOSED;
1397 break;
1398 case NES_CM_STATE_FIN_WAIT1:
1399 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1400 break;
1401 case NES_CM_STATE_CLOSING:
1402 cm_node->state = NES_CM_STATE_TIME_WAIT;
1403 /* need to schedule this to happen in 2MSL timeouts */
1404 cm_node->state = NES_CM_STATE_CLOSED;
1405 break;
1406 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1407 case NES_CM_STATE_ESTABLISHED:
1408 case NES_CM_STATE_MPAREQ_SENT:
1409 case NES_CM_STATE_CLOSE_WAIT:
1410 case NES_CM_STATE_TIME_WAIT:
1411 case NES_CM_STATE_CLOSED:
1412 break;
1413 case NES_CM_STATE_LISTENING:
1414 nes_debug(NES_DBG_CM, "Received an ACK on a listening port (SYN %d)\n", tcph->syn);
1415 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1416 send_reset(cm_node);
1417 /* send_reset bumps refcount, this should have been a new node */
1418 rem_ref_cm_node(cm_core, cm_node);
1419 return -1;
1420 break;
1421 case NES_CM_STATE_TSA:
1422 nes_debug(NES_DBG_CM, "Received a packet with the ack bit set while in TSA state\n");
1423 break;
1424 case NES_CM_STATE_UNKNOWN:
1425 case NES_CM_STATE_INITED:
1426 case NES_CM_STATE_ACCEPTING:
1427 case NES_CM_STATE_FIN_WAIT2:
1428 default:
1429 nes_debug(NES_DBG_CM, "Received ack from unknown state: %x\n",
1430 cm_node->state);
1431 send_reset(cm_node);
1432 break;
1433 }
1434 }
1435
1436 if (tcph->syn) {
1437 if (cm_node->state == NES_CM_STATE_LISTENING) {
1438 /* do not exceed backlog */
1439 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1440 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1441 cm_node->listener->backlog) {
1442 nes_debug(NES_DBG_CM, "drop syn due to backlog pressure \n");
1443 cm_backlog_drops++;
1444 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1445 rem_ref_cm_node(cm_core, cm_node);
1446 return 0;
1447 }
1448 cm_node->accept_pend = 1;
1449
1450 }
1451 if (datasize == 0)
1452 cm_node->tcp_cntxt.rcv_nxt ++;
1453
1454 if (cm_node->state == NES_CM_STATE_LISTENING) {
1455 cm_node->state = NES_CM_STATE_SYN_RCVD;
1456 send_syn(cm_node, 1);
1457 }
1458 if (cm_node->state == NES_CM_STATE_ONE_SIDE_ESTABLISHED) {
1459 cm_node->state = NES_CM_STATE_ESTABLISHED;
1460 /* send final handshake ACK */
1461 ret = send_ack(cm_node);
1462 if (ret < 0)
1463 return ret;
1464
1465 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1466 ret = send_mpa_request(cm_node);
1467 if (ret < 0)
1468 return ret;
1469 }
1470 }
1471
1472 if (tcph->fin) {
1473 cm_node->tcp_cntxt.rcv_nxt++;
1474 switch (cm_node->state) {
1475 case NES_CM_STATE_SYN_RCVD:
1476 case NES_CM_STATE_SYN_SENT:
1477 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1478 case NES_CM_STATE_ESTABLISHED:
1479 case NES_CM_STATE_ACCEPTING:
1480 case NES_CM_STATE_MPAREQ_SENT:
1481 cm_node->state = NES_CM_STATE_CLOSE_WAIT;
1482 cm_node->state = NES_CM_STATE_LAST_ACK;
1483 ret = send_fin(cm_node, NULL);
1484 break;
1485 case NES_CM_STATE_FIN_WAIT1:
1486 cm_node->state = NES_CM_STATE_CLOSING;
1487 ret = send_ack(cm_node);
1488 break;
1489 case NES_CM_STATE_FIN_WAIT2:
1490 cm_node->state = NES_CM_STATE_TIME_WAIT;
1491 cm_node->tcp_cntxt.loc_seq_num ++;
1492 ret = send_ack(cm_node);
1493 /* need to schedule this to happen in 2MSL timeouts */
1494 cm_node->state = NES_CM_STATE_CLOSED;
1495 break;
1496 case NES_CM_STATE_CLOSE_WAIT:
1497 case NES_CM_STATE_LAST_ACK:
1498 case NES_CM_STATE_CLOSING:
1499 case NES_CM_STATE_TSA:
1500 default:
1501 nes_debug(NES_DBG_CM, "Received a fin while in %x state\n",
1502 cm_node->state);
1503 ret = -EINVAL;
1504 break;
1505 }
1506 }
1507
1508 if (datasize) {
1509 u8 *dataloc = skb->data;
1510 /* figure out what state we are in and handle transition to next state */
1511 switch (cm_node->state) {
1512 case NES_CM_STATE_LISTENING:
1513 case NES_CM_STATE_SYN_RCVD:
1514 case NES_CM_STATE_SYN_SENT:
1515 case NES_CM_STATE_FIN_WAIT1:
1516 case NES_CM_STATE_FIN_WAIT2:
1517 case NES_CM_STATE_CLOSE_WAIT:
1518 case NES_CM_STATE_LAST_ACK:
1519 case NES_CM_STATE_CLOSING:
1520 break;
1521 case NES_CM_STATE_MPAREQ_SENT:
1522 /* recv the mpa res frame, ret=frame len (incl priv data) */
1523 ret = parse_mpa(cm_node, dataloc, datasize);
1524 if (ret < 0)
1525 break;
1526 /* set the req frame payload len in skb */
1527 /* we are done handling this state, set node to a TSA state */
1528 cm_node->state = NES_CM_STATE_TSA;
1529 send_ack(cm_node);
1530 create_event(cm_node, NES_CM_EVENT_CONNECTED);
1531 break;
1532
1533 case NES_CM_STATE_ESTABLISHED:
1534 /* we are expecting an MPA req frame */
1535 ret = parse_mpa(cm_node, dataloc, datasize);
1536 if (ret < 0) {
1537 break;
1538 }
1539 cm_node->state = NES_CM_STATE_TSA;
1540 send_ack(cm_node);
1541 /* we got a valid MPA request, create an event */
1542 create_event(cm_node, NES_CM_EVENT_MPA_REQ);
1543 break;
1544 case NES_CM_STATE_TSA:
1545 handle_exception_pkt(cm_node, skb);
1546 break;
1547 case NES_CM_STATE_UNKNOWN:
1548 case NES_CM_STATE_INITED:
1549 default:
1550 ret = -1;
1551 }
1552 }
1553
1554 return ret;
1555}
1556
1557
1558/**
1559 * mini_cm_listen - create a listen node with params
1560 */
1561static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1562 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1563{
1564 struct nes_cm_listener *listener;
1565 unsigned long flags;
1566
1567 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1568 cm_info->loc_addr, cm_info->loc_port);
1569
1570 /* cannot have multiple matching listeners */
1571 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1572 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1573 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1574 /* find automatically incs ref count ??? */
1575 atomic_dec(&listener->ref_count);
1576 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1577 return NULL;
1578 }
1579
1580 if (!listener) {
1581 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1582 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1583 if (!listener) {
1584 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1585 return NULL;
1586 }
1587
1588 memset(listener, 0, sizeof(struct nes_cm_listener));
1589 listener->loc_addr = htonl(cm_info->loc_addr);
1590 listener->loc_port = htons(cm_info->loc_port);
1591 listener->reused_node = 0;
1592
1593 atomic_set(&listener->ref_count, 1);
1594 }
1595 /* pasive case */
1596 /* find already inc'ed the ref count */
1597 else {
1598 listener->reused_node = 1;
1599 }
1600
1601 listener->cm_id = cm_info->cm_id;
1602 atomic_set(&listener->pend_accepts_cnt, 0);
1603 listener->cm_core = cm_core;
1604 listener->nesvnic = nesvnic;
1605 atomic_inc(&cm_core->node_cnt);
1606 atomic_inc(&cm_core->session_id);
1607
1608 listener->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid);
1609 listener->conn_type = cm_info->conn_type;
1610 listener->backlog = cm_info->backlog;
1611 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1612
1613 if (!listener->reused_node) {
1614 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1615 list_add(&listener->list, &cm_core->listen_list.list);
1616 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1617 atomic_inc(&cm_core->listen_node_cnt);
1618 }
1619
1620 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1621 " listener = %p, backlog = %d, cm_id = %p.\n",
1622 cm_info->loc_addr, cm_info->loc_port,
1623 listener, listener->backlog, listener->cm_id);
1624
1625 return listener;
1626}
1627
1628
1629/**
1630 * mini_cm_connect - make a connection node with params
1631 */
1632struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1633 struct nes_vnic *nesvnic, struct ietf_mpa_frame *mpa_frame,
1634 struct nes_cm_info *cm_info)
1635{
1636 int ret = 0;
1637 struct nes_cm_node *cm_node;
1638 struct nes_cm_listener *loopbackremotelistener;
1639 struct nes_cm_node *loopbackremotenode;
1640 struct nes_cm_info loopback_cm_info;
1641
1642 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) +
1643 ntohs(mpa_frame->priv_data_len);
1644
1645 cm_info->loc_addr = htonl(cm_info->loc_addr);
1646 cm_info->rem_addr = htonl(cm_info->rem_addr);
1647 cm_info->loc_port = htons(cm_info->loc_port);
1648 cm_info->rem_port = htons(cm_info->rem_port);
1649
1650 /* create a CM connection node */
1651 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1652 if (!cm_node)
1653 return NULL;
1654
1655 // set our node side to client (active) side
1656 cm_node->tcp_cntxt.client = 1;
1657 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1658
1659 if (cm_info->loc_addr == cm_info->rem_addr) {
1660 loopbackremotelistener = find_listener(cm_core, cm_node->rem_addr,
1661 cm_node->rem_port, NES_CM_LISTENER_ACTIVE_STATE);
1662 if (loopbackremotelistener == NULL) {
1663 create_event(cm_node, NES_CM_EVENT_ABORTED);
1664 } else {
1665 atomic_inc(&cm_loopbacks);
1666 loopback_cm_info = *cm_info;
1667 loopback_cm_info.loc_port = cm_info->rem_port;
1668 loopback_cm_info.rem_port = cm_info->loc_port;
1669 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
1670 loopbackremotenode = make_cm_node(cm_core, nesvnic, &loopback_cm_info,
1671 loopbackremotelistener);
1672 loopbackremotenode->loopbackpartner = cm_node;
1673 loopbackremotenode->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1674 cm_node->loopbackpartner = loopbackremotenode;
1675 memcpy(loopbackremotenode->mpa_frame_buf, &mpa_frame->priv_data,
1676 mpa_frame_size);
1677 loopbackremotenode->mpa_frame_size = mpa_frame_size -
1678 sizeof(struct ietf_mpa_frame);
1679
1680 // we are done handling this state, set node to a TSA state
1681 cm_node->state = NES_CM_STATE_TSA;
1682 cm_node->tcp_cntxt.rcv_nxt = loopbackremotenode->tcp_cntxt.loc_seq_num;
1683 loopbackremotenode->tcp_cntxt.rcv_nxt = cm_node->tcp_cntxt.loc_seq_num;
1684 cm_node->tcp_cntxt.max_snd_wnd = loopbackremotenode->tcp_cntxt.rcv_wnd;
1685 loopbackremotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
1686 cm_node->tcp_cntxt.snd_wnd = loopbackremotenode->tcp_cntxt.rcv_wnd;
1687 loopbackremotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
1688 cm_node->tcp_cntxt.snd_wscale = loopbackremotenode->tcp_cntxt.rcv_wscale;
1689 loopbackremotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
1690
1691 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1692 }
1693 return cm_node;
1694 }
1695
1696 /* set our node side to client (active) side */
1697 cm_node->tcp_cntxt.client = 1;
1698 /* init our MPA frame ptr */
1699 memcpy(&cm_node->mpa_frame, mpa_frame, mpa_frame_size);
1700 cm_node->mpa_frame_size = mpa_frame_size;
1701
1702 /* send a syn and goto syn sent state */
1703 cm_node->state = NES_CM_STATE_SYN_SENT;
1704 ret = send_syn(cm_node, 0);
1705
1706 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X, port=0x%04x,"
1707 " cm_node=%p, cm_id = %p.\n",
1708 cm_node->rem_addr, cm_node->rem_port, cm_node, cm_node->cm_id);
1709
1710 return cm_node;
1711}
1712
1713
1714/**
1715 * mini_cm_accept - accept a connection
1716 * This function is never called
1717 */
1718int mini_cm_accept(struct nes_cm_core *cm_core, struct ietf_mpa_frame *mpa_frame,
1719 struct nes_cm_node *cm_node)
1720{
1721 return 0;
1722}
1723
1724
1725/**
1726 * mini_cm_reject - reject and teardown a connection
1727 */
1728int mini_cm_reject(struct nes_cm_core *cm_core,
1729 struct ietf_mpa_frame *mpa_frame,
1730 struct nes_cm_node *cm_node)
1731{
1732 int ret = 0;
1733 struct sk_buff *skb;
1734 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) +
1735 ntohs(mpa_frame->priv_data_len);
1736
1737 skb = get_free_pkt(cm_node);
1738 if (!skb) {
1739 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1740 return -1;
1741 }
1742
1743 /* send an MPA Request frame */
1744 form_cm_frame(skb, cm_node, NULL, 0, mpa_frame, mpa_frame_size, SET_ACK | SET_FIN);
1745 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1746
1747 cm_node->state = NES_CM_STATE_CLOSED;
1748 ret = send_fin(cm_node, NULL);
1749
1750 if (ret < 0) {
1751 printk(KERN_INFO PFX "failed to send MPA Reply (reject)\n");
1752 return ret;
1753 }
1754
1755 return ret;
1756}
1757
1758
1759/**
1760 * mini_cm_close
1761 */
1762int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1763{
1764 int ret = 0;
1765
1766 if (!cm_core || !cm_node)
1767 return -EINVAL;
1768
1769 switch (cm_node->state) {
1770 /* if passed in node is null, create a reference key node for node search */
1771 /* check if we found an owner node for this pkt */
1772 case NES_CM_STATE_SYN_RCVD:
1773 case NES_CM_STATE_SYN_SENT:
1774 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1775 case NES_CM_STATE_ESTABLISHED:
1776 case NES_CM_STATE_ACCEPTING:
1777 case NES_CM_STATE_MPAREQ_SENT:
1778 cm_node->state = NES_CM_STATE_FIN_WAIT1;
1779 send_fin(cm_node, NULL);
1780 break;
1781 case NES_CM_STATE_CLOSE_WAIT:
1782 cm_node->state = NES_CM_STATE_LAST_ACK;
1783 send_fin(cm_node, NULL);
1784 break;
1785 case NES_CM_STATE_FIN_WAIT1:
1786 case NES_CM_STATE_FIN_WAIT2:
1787 case NES_CM_STATE_LAST_ACK:
1788 case NES_CM_STATE_TIME_WAIT:
1789 case NES_CM_STATE_CLOSING:
1790 ret = -1;
1791 break;
1792 case NES_CM_STATE_LISTENING:
1793 case NES_CM_STATE_UNKNOWN:
1794 case NES_CM_STATE_INITED:
1795 case NES_CM_STATE_CLOSED:
1796 case NES_CM_STATE_TSA:
1797 ret = rem_ref_cm_node(cm_core, cm_node);
1798 break;
1799 }
1800 cm_node->cm_id = NULL;
1801 return ret;
1802}
1803
1804
1805/**
1806 * recv_pkt - recv an ETHERNET packet, and process it through CM
1807 * node state machine
1808 */
1809int mini_cm_recv_pkt(struct nes_cm_core *cm_core, struct nes_vnic *nesvnic,
1810 struct sk_buff *skb)
1811{
1812 struct nes_cm_node *cm_node = NULL;
1813 struct nes_cm_listener *listener = NULL;
1814 struct iphdr *iph;
1815 struct tcphdr *tcph;
1816 struct nes_cm_info nfo;
1817 int ret = 0;
1818
1819 if (!skb || skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
1820 ret = -EINVAL;
1821 goto out;
1822 }
1823
1824 iph = (struct iphdr *)skb->data;
1825 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
1826 skb_reset_network_header(skb);
1827 skb_set_transport_header(skb, sizeof(*tcph));
1828 skb->len = ntohs(iph->tot_len);
1829
1830 nfo.loc_addr = ntohl(iph->daddr);
1831 nfo.loc_port = ntohs(tcph->dest);
1832 nfo.rem_addr = ntohl(iph->saddr);
1833 nfo.rem_port = ntohs(tcph->source);
1834
1835 nes_debug(NES_DBG_CM, "Received packet: dest=0x%08X:0x%04X src=0x%08X:0x%04X\n",
1836 iph->daddr, tcph->dest, iph->saddr, tcph->source);
1837
1838 /* note: this call is going to increment cm_node ref count */
1839 cm_node = find_node(cm_core,
1840 nfo.rem_port, nfo.rem_addr,
1841 nfo.loc_port, nfo.loc_addr);
1842
1843 if (!cm_node) {
1844 listener = find_listener(cm_core, nfo.loc_addr, nfo.loc_port,
1845 NES_CM_LISTENER_ACTIVE_STATE);
1846 if (listener) {
1847 nfo.cm_id = listener->cm_id;
1848 nfo.conn_type = listener->conn_type;
1849 } else {
1850 nfo.cm_id = NULL;
1851 nfo.conn_type = 0;
1852 }
1853
1854 cm_node = make_cm_node(cm_core, nesvnic, &nfo, listener);
1855 if (!cm_node) {
1856 nes_debug(NES_DBG_CM, "Unable to allocate node\n");
1857 if (listener) {
1858 nes_debug(NES_DBG_CM, "unable to allocate node and decrementing listener refcount\n");
1859 atomic_dec(&listener->ref_count);
1860 }
1861 ret = -1;
1862 goto out;
1863 }
1864 if (!listener) {
1865 nes_debug(NES_DBG_CM, "Packet found for unknown port %x refcnt=%d\n",
1866 nfo.loc_port, atomic_read(&cm_node->ref_count));
1867 if (!tcph->rst) {
1868 nes_debug(NES_DBG_CM, "Packet found for unknown port=%d"
1869 " rem_port=%d refcnt=%d\n",
1870 nfo.loc_port, nfo.rem_port, atomic_read(&cm_node->ref_count));
1871
1872 cm_node->tcp_cntxt.rcv_nxt = ntohl(tcph->seq);
1873 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1874 send_reset(cm_node);
1875 }
1876 rem_ref_cm_node(cm_core, cm_node);
1877 ret = -1;
1878 goto out;
1879 }
1880 add_ref_cm_node(cm_node);
1881 cm_node->state = NES_CM_STATE_LISTENING;
1882 }
1883
1884 nes_debug(NES_DBG_CM, "Processing Packet for node %p, data = (%p):\n",
1885 cm_node, skb->data);
1886 process_packet(cm_node, skb, cm_core);
1887
1888 rem_ref_cm_node(cm_core, cm_node);
1889 out:
1890 if (skb)
1891 dev_kfree_skb_any(skb);
1892 return ret;
1893}
1894
1895
1896/**
1897 * nes_cm_alloc_core - allocate a top level instance of a cm core
1898 */
1899struct nes_cm_core *nes_cm_alloc_core(void)
1900{
1901 int i;
1902
1903 struct nes_cm_core *cm_core;
1904 struct sk_buff *skb = NULL;
1905
1906 /* setup the CM core */
1907 /* alloc top level core control structure */
1908 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
1909 if (!cm_core)
1910 return NULL;
1911
1912 INIT_LIST_HEAD(&cm_core->connected_nodes);
1913 init_timer(&cm_core->tcp_timer);
1914 cm_core->tcp_timer.function = nes_cm_timer_tick;
1915
1916 cm_core->mtu = NES_CM_DEFAULT_MTU;
1917 cm_core->state = NES_CM_STATE_INITED;
1918 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
1919
1920 atomic_set(&cm_core->session_id, 0);
1921 atomic_set(&cm_core->events_posted, 0);
1922
1923 /* init the packet lists */
1924 skb_queue_head_init(&cm_core->tx_free_list);
1925
1926 for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) {
1927 skb = dev_alloc_skb(cm_core->mtu);
1928 if (!skb) {
1929 kfree(cm_core);
1930 return NULL;
1931 }
1932 /* add 'raw' skb to free frame list */
1933 skb_queue_head(&cm_core->tx_free_list, skb);
1934 }
1935
1936 cm_core->api = &nes_cm_api;
1937
1938 spin_lock_init(&cm_core->ht_lock);
1939 spin_lock_init(&cm_core->listen_list_lock);
1940
1941 INIT_LIST_HEAD(&cm_core->listen_list.list);
1942
1943 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
1944
1945 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
1946 cm_core->event_wq = create_singlethread_workqueue("nesewq");
1947 cm_core->post_event = nes_cm_post_event;
1948 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
1949 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
1950
1951 print_core(cm_core);
1952 return cm_core;
1953}
1954
1955
1956/**
1957 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
1958 */
1959int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
1960{
1961 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
1962
1963 if (!cm_core)
1964 return -EINVAL;
1965
1966 barrier();
1967
1968 if (timer_pending(&cm_core->tcp_timer)) {
1969 del_timer(&cm_core->tcp_timer);
1970 }
1971
1972 destroy_workqueue(cm_core->event_wq);
1973 destroy_workqueue(cm_core->disconn_wq);
1974 nes_debug(NES_DBG_CM, "\n");
1975 kfree(cm_core);
1976
1977 return 0;
1978}
1979
1980
1981/**
1982 * mini_cm_get
1983 */
1984int mini_cm_get(struct nes_cm_core *cm_core)
1985{
1986 return cm_core->state;
1987}
1988
1989
1990/**
1991 * mini_cm_set
1992 */
1993int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
1994{
1995 int ret = 0;
1996
1997 switch (type) {
1998 case NES_CM_SET_PKT_SIZE:
1999 cm_core->mtu = value;
2000 break;
2001 case NES_CM_SET_FREE_PKT_Q_SIZE:
2002 cm_core->free_tx_pkt_max = value;
2003 break;
2004 default:
2005 /* unknown set option */
2006 ret = -EINVAL;
2007 }
2008
2009 return ret;
2010}
2011
2012
2013/**
2014 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2015 * successfully exchanged when this is called
2016 */
2017static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2018{
2019 int ret = 0;
2020
2021 if (!nesqp)
2022 return -EINVAL;
2023
2024 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2025 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2026 NES_QPCONTEXT_MISC_DROS);
2027
2028 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2029 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2030
2031 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2032
2033 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2034
2035 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2036 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2037
2038 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2039 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2040 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2041
2042 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2043 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2044 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2045
2046 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2047 nesqp->nesqp_context->ts_recent = 0;
2048 nesqp->nesqp_context->ts_age = 0;
2049 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2050 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2051 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2052 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2053 cm_node->tcp_cntxt.rcv_wscale);
2054 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2055 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2056 nesqp->nesqp_context->srtt = 0;
2057 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2058 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2059 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2060 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2061 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2062 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2063
2064 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2065 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2066 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2067 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2068 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2069 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2070 le32_to_cpu(nesqp->nesqp_context->misc));
2071 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2072 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2073 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2074
2075 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2076 cm_node->state = NES_CM_STATE_TSA;
2077
2078 return ret;
2079}
2080
2081
2082/**
2083 * nes_cm_disconn
2084 */
2085int nes_cm_disconn(struct nes_qp *nesqp)
2086{
2087 unsigned long flags;
2088
2089 spin_lock_irqsave(&nesqp->lock, flags);
2090 if (nesqp->disconn_pending == 0) {
2091 nesqp->disconn_pending++;
2092 spin_unlock_irqrestore(&nesqp->lock, flags);
2093 /* nes_add_ref(&nesqp->ibqp); */
2094 /* init our disconnect work element, to */
2095 INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
2096
2097 queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
2098 } else {
2099 spin_unlock_irqrestore(&nesqp->lock, flags);
2100 nes_rem_ref(&nesqp->ibqp);
2101 }
2102
2103 return 0;
2104}
2105
2106
2107/**
2108 * nes_disconnect_worker
2109 */
2110void nes_disconnect_worker(struct work_struct *work)
2111{
2112 struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
2113
2114 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2115 nesqp->last_aeq, nesqp->hwqp.qp_id);
2116 nes_cm_disconn_true(nesqp);
2117}
2118
2119
2120/**
2121 * nes_cm_disconn_true
2122 */
2123int nes_cm_disconn_true(struct nes_qp *nesqp)
2124{
2125 unsigned long flags;
2126 int ret = 0;
2127 struct iw_cm_id *cm_id;
2128 struct iw_cm_event cm_event;
2129 struct nes_vnic *nesvnic;
2130 u16 last_ae;
2131 u8 original_hw_tcp_state;
2132 u8 original_ibqp_state;
2133 u8 issued_disconnect_reset = 0;
2134
2135 if (!nesqp) {
2136 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2137 return -1;
2138 }
2139
2140 spin_lock_irqsave(&nesqp->lock, flags);
2141 cm_id = nesqp->cm_id;
2142 /* make sure we havent already closed this connection */
2143 if (!cm_id) {
2144 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2145 nesqp->hwqp.qp_id);
2146 spin_unlock_irqrestore(&nesqp->lock, flags);
2147 nes_rem_ref(&nesqp->ibqp);
2148 return -1;
2149 }
2150
2151 nesvnic = to_nesvnic(nesqp->ibqp.device);
2152 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2153
2154 original_hw_tcp_state = nesqp->hw_tcp_state;
2155 original_ibqp_state = nesqp->ibqp_state;
2156 last_ae = nesqp->last_aeq;
2157
2158
2159 nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
2160
2161 if ((nesqp->cm_id) && (cm_id->event_handler)) {
2162 if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2163 ((original_ibqp_state == IB_QPS_RTS) &&
2164 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2165 atomic_inc(&cm_disconnects);
2166 cm_event.event = IW_CM_EVENT_DISCONNECT;
2167 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
2168 issued_disconnect_reset = 1;
2169 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2170 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event (status reset) for "
2171 " QP%u, cm_id = %p. \n",
2172 nesqp->hwqp.qp_id, cm_id);
2173 } else {
2174 cm_event.status = IW_CM_EVENT_STATUS_OK;
2175 }
2176
2177 cm_event.local_addr = cm_id->local_addr;
2178 cm_event.remote_addr = cm_id->remote_addr;
2179 cm_event.private_data = NULL;
2180 cm_event.private_data_len = 0;
2181
2182 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event for "
2183 " QP%u, SQ Head = %u, SQ Tail = %u. cm_id = %p, refcount = %u.\n",
2184 nesqp->hwqp.qp_id,
2185 nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail, cm_id,
2186 atomic_read(&nesqp->refcount));
2187
2188 spin_unlock_irqrestore(&nesqp->lock, flags);
2189 ret = cm_id->event_handler(cm_id, &cm_event);
2190 if (ret)
2191 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2192 spin_lock_irqsave(&nesqp->lock, flags);
2193 }
2194
2195 nesqp->disconn_pending = 0;
2196 /* There might have been another AE while the lock was released */
2197 original_hw_tcp_state = nesqp->hw_tcp_state;
2198 original_ibqp_state = nesqp->ibqp_state;
2199 last_ae = nesqp->last_aeq;
2200
2201 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2202 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2203 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2204 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2205 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2206 atomic_inc(&cm_closes);
2207 nesqp->cm_id = NULL;
2208 nesqp->in_disconnect = 0;
2209 spin_unlock_irqrestore(&nesqp->lock, flags);
2210 nes_disconnect(nesqp, 1);
2211
2212 cm_id->provider_data = nesqp;
2213 /* Send up the close complete event */
2214 cm_event.event = IW_CM_EVENT_CLOSE;
2215 cm_event.status = IW_CM_EVENT_STATUS_OK;
2216 cm_event.provider_data = cm_id->provider_data;
2217 cm_event.local_addr = cm_id->local_addr;
2218 cm_event.remote_addr = cm_id->remote_addr;
2219 cm_event.private_data = NULL;
2220 cm_event.private_data_len = 0;
2221
2222 ret = cm_id->event_handler(cm_id, &cm_event);
2223 if (ret) {
2224 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2225 }
2226
2227 cm_id->rem_ref(cm_id);
2228
2229 spin_lock_irqsave(&nesqp->lock, flags);
2230 if (nesqp->flush_issued == 0) {
2231 nesqp->flush_issued = 1;
2232 spin_unlock_irqrestore(&nesqp->lock, flags);
2233 flush_wqes(nesvnic->nesdev, nesqp, NES_CQP_FLUSH_RQ, 1);
2234 } else {
2235 spin_unlock_irqrestore(&nesqp->lock, flags);
2236 }
2237
2238 /* This reference is from either ModifyQP or the AE processing,
2239 there is still a race here with modifyqp */
2240 nes_rem_ref(&nesqp->ibqp);
2241
2242 } else {
2243 cm_id = nesqp->cm_id;
2244 spin_unlock_irqrestore(&nesqp->lock, flags);
2245 /* check to see if the inbound reset beat the outbound reset */
2246 if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
2247 nes_debug(NES_DBG_CM, "QP%u: Decing refcount due to inbound reset"
2248 " beating the outbound reset.\n",
2249 nesqp->hwqp.qp_id);
2250 nes_rem_ref(&nesqp->ibqp);
2251 }
2252 }
2253 } else {
2254 nesqp->disconn_pending = 0;
2255 spin_unlock_irqrestore(&nesqp->lock, flags);
2256 }
2257 nes_rem_ref(&nesqp->ibqp);
2258
2259 return 0;
2260}
2261
2262
2263/**
2264 * nes_disconnect
2265 */
2266int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2267{
2268 int ret = 0;
2269 struct nes_vnic *nesvnic;
2270 struct nes_device *nesdev;
2271
2272 nesvnic = to_nesvnic(nesqp->ibqp.device);
2273 if (!nesvnic)
2274 return -EINVAL;
2275
2276 nesdev = nesvnic->nesdev;
2277
2278 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2279 atomic_read(&nesvnic->netdev->refcnt));
2280
2281 if (nesqp->active_conn) {
2282
2283 /* indicate this connection is NOT active */
2284 nesqp->active_conn = 0;
2285 } else {
2286 /* Need to free the Last Streaming Mode Message */
2287 if (nesqp->ietf_frame) {
2288 pci_free_consistent(nesdev->pcidev,
2289 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2290 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2291 }
2292 }
2293
2294 /* close the CM node down if it is still active */
2295 if (nesqp->cm_node) {
2296 nes_debug(NES_DBG_CM, "Call close API\n");
2297
2298 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2299 nesqp->cm_node = NULL;
2300 }
2301
2302 return ret;
2303}
2304
2305
2306/**
2307 * nes_accept
2308 */
2309int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2310{
2311 u64 u64temp;
2312 struct ib_qp *ibqp;
2313 struct nes_qp *nesqp;
2314 struct nes_vnic *nesvnic;
2315 struct nes_device *nesdev;
2316 struct nes_cm_node *cm_node;
2317 struct nes_adapter *adapter;
2318 struct ib_qp_attr attr;
2319 struct iw_cm_event cm_event;
2320 struct nes_hw_qp_wqe *wqe;
2321 struct nes_v4_quad nes_quad;
2322 int ret;
2323
2324 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2325 if (!ibqp)
2326 return -EINVAL;
2327
2328 /* get all our handles */
2329 nesqp = to_nesqp(ibqp);
2330 nesvnic = to_nesvnic(nesqp->ibqp.device);
2331 nesdev = nesvnic->nesdev;
2332 adapter = nesdev->nesadapter;
2333
2334 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2335 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2336
2337 /* since this is from a listen, we were able to put node handle into cm_id */
2338 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2339
2340 /* associate the node with the QP */
2341 nesqp->cm_node = (void *)cm_node;
2342
2343 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu\n",
2344 nesqp->hwqp.qp_id, cm_node, jiffies);
2345 atomic_inc(&cm_accepts);
2346
2347 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2348 atomic_read(&nesvnic->netdev->refcnt));
2349
2350 /* allocate the ietf frame and space for private data */
2351 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2352 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2353 &nesqp->ietf_frame_pbase);
2354
2355 if (!nesqp->ietf_frame) {
2356 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
2357 return -ENOMEM;
2358 }
2359
2360
2361 /* setup the MPA frame */
2362 nesqp->private_data_len = conn_param->private_data_len;
2363 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2364
2365 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2366 conn_param->private_data_len);
2367
2368 nesqp->ietf_frame->priv_data_len = cpu_to_be16(conn_param->private_data_len);
2369 nesqp->ietf_frame->rev = mpa_version;
2370 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2371
2372 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2373 wqe = &nesqp->hwqp.sq_vbase[0];
2374
2375 if (cm_id->remote_addr.sin_addr.s_addr != cm_id->local_addr.sin_addr.s_addr) {
2376 u64temp = (unsigned long)nesqp;
2377 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2378 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2379 u64temp);
2380 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2381 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING | NES_IWARP_SQ_WQE_WRPDU);
2382 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2383 cpu_to_le32(conn_param->private_data_len + sizeof(struct ietf_mpa_frame));
2384 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
2385 cpu_to_le32((u32)nesqp->ietf_frame_pbase);
2386 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
2387 cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
2388 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2389 cpu_to_le32(conn_param->private_data_len + sizeof(struct ietf_mpa_frame));
2390 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2391
2392 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2393 NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | NES_QPCONTEXT_ORDIRD_WRPDU);
2394 } else {
2395 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2396 NES_QPCONTEXT_ORDIRD_WRPDU | NES_QPCONTEXT_ORDIRD_ALSMM));
2397 }
2398 nesqp->skip_lsmm = 1;
2399
2400
2401 /* Cache the cm_id in the qp */
2402 nesqp->cm_id = cm_id;
2403 cm_node->cm_id = cm_id;
2404
2405 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2406 cm_id->provider_data = nesqp;
2407 nesqp->active_conn = 0;
2408
2409 nes_cm_init_tsa_conn(nesqp, cm_node);
2410
2411 nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2412 nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2413 nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2414
2415 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2416 (u32)PCI_FUNC(nesdev->pcidev->devfn) << NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2417
2418 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
2419 nes_arp_table(nesdev, le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2420 NES_ARP_RESOLVE) << 16);
2421
2422 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2423 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2424
2425 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2426
2427 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2428 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2429 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2430
2431 memset(&nes_quad, 0, sizeof(nes_quad));
2432 nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2433 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2434 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2435 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2436
2437 /* Produce hash key */
2438 nesqp->hte_index = cpu_to_be32(
2439 crc32c(~0, (void *)&nes_quad, sizeof(nes_quad)) ^ 0xffffffff);
2440 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2441 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2442
2443 nesqp->hte_index &= adapter->hte_index_mask;
2444 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2445
2446 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2447
2448 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = 0x%08X:0x%04X,"
2449 " rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + private data length=%zu.\n",
2450 nesqp->hwqp.qp_id,
2451 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2452 ntohs(cm_id->remote_addr.sin_port),
2453 ntohl(cm_id->local_addr.sin_addr.s_addr),
2454 ntohs(cm_id->local_addr.sin_port),
2455 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2456 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2457 conn_param->private_data_len+sizeof(struct ietf_mpa_frame));
2458
2459 attr.qp_state = IB_QPS_RTS;
2460 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2461
2462 /* notify OF layer that accept event was successfull */
2463 cm_id->add_ref(cm_id);
2464
2465 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2466 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2467 cm_event.provider_data = (void *)nesqp;
2468 cm_event.local_addr = cm_id->local_addr;
2469 cm_event.remote_addr = cm_id->remote_addr;
2470 cm_event.private_data = NULL;
2471 cm_event.private_data_len = 0;
2472 ret = cm_id->event_handler(cm_id, &cm_event);
2473 if (cm_node->loopbackpartner) {
2474 cm_node->loopbackpartner->mpa_frame_size = nesqp->private_data_len;
2475 /* copy entire MPA frame to our cm_node's frame */
2476 memcpy(cm_node->loopbackpartner->mpa_frame_buf, nesqp->ietf_frame->priv_data,
2477 nesqp->private_data_len);
2478 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2479 }
2480 if (ret)
2481 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
2482 __FUNCTION__, __LINE__, ret);
2483
2484 return 0;
2485}
2486
2487
2488/**
2489 * nes_reject
2490 */
2491int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2492{
2493 struct nes_cm_node *cm_node;
2494 struct nes_cm_core *cm_core;
2495
2496 atomic_inc(&cm_rejects);
2497 cm_node = (struct nes_cm_node *) cm_id->provider_data;
2498 cm_core = cm_node->cm_core;
2499 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2500
2501 strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
2502 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2503
2504 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2505 cm_node->mpa_frame.rev = mpa_version;
2506 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2507
2508 cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2509
2510 return 0;
2511}
2512
2513
2514/**
2515 * nes_connect
2516 * setup and launch cm connect node
2517 */
2518int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2519{
2520 struct ib_qp *ibqp;
2521 struct nes_qp *nesqp;
2522 struct nes_vnic *nesvnic;
2523 struct nes_device *nesdev;
2524 struct nes_cm_node *cm_node;
2525 struct nes_cm_info cm_info;
2526
2527 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2528 if (!ibqp)
2529 return -EINVAL;
2530 nesqp = to_nesqp(ibqp);
2531 if (!nesqp)
2532 return -EINVAL;
2533 nesvnic = to_nesvnic(nesqp->ibqp.device);
2534 if (!nesvnic)
2535 return -EINVAL;
2536 nesdev = nesvnic->nesdev;
2537 if (!nesdev)
2538 return -EINVAL;
2539
2540 atomic_inc(&cm_connects);
2541
2542 nesqp->ietf_frame = kzalloc(sizeof(struct ietf_mpa_frame) +
2543 conn_param->private_data_len, GFP_KERNEL);
2544 if (!nesqp->ietf_frame)
2545 return -ENOMEM;
2546
2547 /* set qp as having an active connection */
2548 nesqp->active_conn = 1;
2549
2550 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = 0x%08X:0x%04X.\n",
2551 nesqp->hwqp.qp_id,
2552 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2553 ntohs(cm_id->remote_addr.sin_port),
2554 ntohl(cm_id->local_addr.sin_addr.s_addr),
2555 ntohs(cm_id->local_addr.sin_port));
2556
2557 /* cache the cm_id in the qp */
2558 nesqp->cm_id = cm_id;
2559
2560 cm_id->provider_data = nesqp;
2561
2562 /* copy the private data */
2563 if (conn_param->private_data_len) {
2564 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2565 conn_param->private_data_len);
2566 }
2567
2568 nesqp->private_data_len = conn_param->private_data_len;
2569 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2570 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
2571 nes_debug(NES_DBG_CM, "mpa private data len =%u\n", conn_param->private_data_len);
2572
2573 strcpy(&nesqp->ietf_frame->key[0], IEFT_MPA_KEY_REQ);
2574 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2575 nesqp->ietf_frame->rev = IETF_MPA_VERSION;
2576 nesqp->ietf_frame->priv_data_len = htons(conn_param->private_data_len);
2577
2578 if (cm_id->local_addr.sin_addr.s_addr != cm_id->remote_addr.sin_addr.s_addr)
2579 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2580 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2581
2582 /* set up the connection params for the node */
2583 cm_info.loc_addr = (cm_id->local_addr.sin_addr.s_addr);
2584 cm_info.loc_port = (cm_id->local_addr.sin_port);
2585 cm_info.rem_addr = (cm_id->remote_addr.sin_addr.s_addr);
2586 cm_info.rem_port = (cm_id->remote_addr.sin_port);
2587 cm_info.cm_id = cm_id;
2588 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2589
2590 cm_id->add_ref(cm_id);
2591 nes_add_ref(&nesqp->ibqp);
2592
2593 /* create a connect CM node connection */
2594 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic, nesqp->ietf_frame, &cm_info);
2595 if (!cm_node) {
2596 if (cm_id->local_addr.sin_addr.s_addr != cm_id->remote_addr.sin_addr.s_addr)
2597 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2598 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
2599 nes_rem_ref(&nesqp->ibqp);
2600 kfree(nesqp->ietf_frame);
2601 nesqp->ietf_frame = NULL;
2602 cm_id->rem_ref(cm_id);
2603 return -ENOMEM;
2604 }
2605
2606 cm_node->apbvt_set = 1;
2607 nesqp->cm_node = cm_node;
2608
2609 return 0;
2610}
2611
2612
2613/**
2614 * nes_create_listen
2615 */
2616int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
2617{
2618 struct nes_vnic *nesvnic;
2619 struct nes_cm_listener *cm_node;
2620 struct nes_cm_info cm_info;
2621 struct nes_adapter *adapter;
2622 int err;
2623
2624
2625 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
2626 cm_id, ntohs(cm_id->local_addr.sin_port));
2627
2628 nesvnic = to_nesvnic(cm_id->device);
2629 if (!nesvnic)
2630 return -EINVAL;
2631 adapter = nesvnic->nesdev->nesadapter;
2632 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2633 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2634
2635 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
2636 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
2637
2638 /* setup listen params in our api call struct */
2639 cm_info.loc_addr = nesvnic->local_ipaddr;
2640 cm_info.loc_port = cm_id->local_addr.sin_port;
2641 cm_info.backlog = backlog;
2642 cm_info.cm_id = cm_id;
2643
2644 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2645
2646
2647 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
2648 if (!cm_node) {
2649 printk("%s[%u] Error returned from listen API call\n",
2650 __FUNCTION__, __LINE__);
2651 return -ENOMEM;
2652 }
2653
2654 cm_id->provider_data = cm_node;
2655
2656 if (!cm_node->reused_node) {
2657 err = nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2658 PCI_FUNC(nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2659 if (err) {
2660 printk("nes_manage_apbvt call returned %d.\n", err);
2661 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
2662 return err;
2663 }
2664 cm_listens_created++;
2665 }
2666
2667 cm_id->add_ref(cm_id);
2668 cm_id->provider_data = (void *)cm_node;
2669
2670
2671 return 0;
2672}
2673
2674
2675/**
2676 * nes_destroy_listen
2677 */
2678int nes_destroy_listen(struct iw_cm_id *cm_id)
2679{
2680 if (cm_id->provider_data)
2681 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
2682 else
2683 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
2684
2685 cm_id->rem_ref(cm_id);
2686
2687 return 0;
2688}
2689
2690
2691/**
2692 * nes_cm_recv
2693 */
2694int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
2695{
2696 cm_packets_received++;
2697 if ((g_cm_core) && (g_cm_core->api)) {
2698 g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
2699 } else {
2700 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
2701 " cm is not setup properly.\n");
2702 }
2703
2704 return 0;
2705}
2706
2707
2708/**
2709 * nes_cm_start
2710 * Start and init a cm core module
2711 */
2712int nes_cm_start(void)
2713{
2714 nes_debug(NES_DBG_CM, "\n");
2715 /* create the primary CM core, pass this handle to subsequent core inits */
2716 g_cm_core = nes_cm_alloc_core();
2717 if (g_cm_core) {
2718 return 0;
2719 } else {
2720 return -ENOMEM;
2721 }
2722}
2723
2724
2725/**
2726 * nes_cm_stop
2727 * stop and dealloc all cm core instances
2728 */
2729int nes_cm_stop(void)
2730{
2731 g_cm_core->api->destroy_cm_core(g_cm_core);
2732 return 0;
2733}
2734
2735
2736/**
2737 * cm_event_connected
2738 * handle a connected event, setup QPs and HW
2739 */
2740void cm_event_connected(struct nes_cm_event *event)
2741{
2742 u64 u64temp;
2743 struct nes_qp *nesqp;
2744 struct nes_vnic *nesvnic;
2745 struct nes_device *nesdev;
2746 struct nes_cm_node *cm_node;
2747 struct nes_adapter *nesadapter;
2748 struct ib_qp_attr attr;
2749 struct iw_cm_id *cm_id;
2750 struct iw_cm_event cm_event;
2751 struct nes_hw_qp_wqe *wqe;
2752 struct nes_v4_quad nes_quad;
2753 int ret;
2754
2755 /* get all our handles */
2756 cm_node = event->cm_node;
2757 cm_id = cm_node->cm_id;
2758 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
2759 nesqp = (struct nes_qp *)cm_id->provider_data;
2760 nesvnic = to_nesvnic(nesqp->ibqp.device);
2761 nesdev = nesvnic->nesdev;
2762 nesadapter = nesdev->nesadapter;
2763
2764 if (nesqp->destroyed) {
2765 return;
2766 }
2767 atomic_inc(&cm_connecteds);
2768 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
2769 " local port 0x%04X. jiffies = %lu.\n",
2770 nesqp->hwqp.qp_id,
2771 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2772 ntohs(cm_id->remote_addr.sin_port),
2773 ntohs(cm_id->local_addr.sin_port),
2774 jiffies);
2775
2776 nes_cm_init_tsa_conn(nesqp, cm_node);
2777
2778 /* set the QP tsa context */
2779 nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2780 nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2781 nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2782
2783 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2784 (u32)PCI_FUNC(nesdev->pcidev->devfn) << NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2785 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
2786 nes_arp_table(nesdev, le32_to_cpu(nesqp->nesqp_context->ip0),
2787 NULL, NES_ARP_RESOLVE) << 16);
2788 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2789 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2790 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2791 nesqp->nesqp_context->ird_ord_sizes |=
2792 cpu_to_le32((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
2793
2794 /* Adjust tail for not having a LSMM */
2795 nesqp->hwqp.sq_tail = 1;
2796
2797#if defined(NES_SEND_FIRST_WRITE)
2798 if (cm_node->send_write0) {
2799 nes_debug(NES_DBG_CM, "Sending first write.\n");
2800 wqe = &nesqp->hwqp.sq_vbase[0];
2801 u64temp = (unsigned long)nesqp;
2802 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2803 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2804 u64temp);
2805 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
2806 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
2807 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
2808 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
2809 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
2810 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2811
2812 /* use the reserved spot on the WQ for the extra first WQE */
2813 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2814 NES_QPCONTEXT_ORDIRD_WRPDU | NES_QPCONTEXT_ORDIRD_ALSMM));
2815 nesqp->skip_lsmm = 1;
2816 nesqp->hwqp.sq_tail = 0;
2817 nes_write32(nesdev->regs + NES_WQE_ALLOC,
2818 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
2819 }
2820#endif
2821
2822 memset(&nes_quad, 0, sizeof(nes_quad));
2823
2824 nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2825 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2826 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2827 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2828
2829 /* Produce hash key */
2830 nesqp->hte_index = cpu_to_be32(
2831 crc32c(~0, (void *)&nes_quad, sizeof(nes_quad)) ^ 0xffffffff);
2832 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
2833 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
2834
2835 nesqp->hte_index &= nesadapter->hte_index_mask;
2836 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2837
2838 nesqp->ietf_frame = &cm_node->mpa_frame;
2839 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
2840 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2841
2842 /* modify QP state to rts */
2843 attr.qp_state = IB_QPS_RTS;
2844 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2845
2846 /* notify OF layer we successfully created the requested connection */
2847 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
2848 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2849 cm_event.provider_data = cm_id->provider_data;
2850 cm_event.local_addr.sin_family = AF_INET;
2851 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
2852 cm_event.remote_addr = cm_id->remote_addr;
2853
2854 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
2855 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
2856
2857 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
2858 ret = cm_id->event_handler(cm_id, &cm_event);
2859 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2860
2861 if (ret)
2862 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
2863 __FUNCTION__, __LINE__, ret);
2864 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = %lu\n",
2865 nesqp->hwqp.qp_id, jiffies );
2866
2867 nes_rem_ref(&nesqp->ibqp);
2868
2869 return;
2870}
2871
2872
2873/**
2874 * cm_event_connect_error
2875 */
2876void cm_event_connect_error(struct nes_cm_event *event)
2877{
2878 struct nes_qp *nesqp;
2879 struct iw_cm_id *cm_id;
2880 struct iw_cm_event cm_event;
2881 /* struct nes_cm_info cm_info; */
2882 int ret;
2883
2884 if (!event->cm_node)
2885 return;
2886
2887 cm_id = event->cm_node->cm_id;
2888 if (!cm_id) {
2889 return;
2890 }
2891
2892 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
2893 nesqp = cm_id->provider_data;
2894
2895 if (!nesqp) {
2896 return;
2897 }
2898
2899 /* notify OF layer about this connection error event */
2900 /* cm_id->rem_ref(cm_id); */
2901 nesqp->cm_id = NULL;
2902 cm_id->provider_data = NULL;
2903 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
2904 cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
2905 cm_event.provider_data = cm_id->provider_data;
2906 cm_event.local_addr = cm_id->local_addr;
2907 cm_event.remote_addr = cm_id->remote_addr;
2908 cm_event.private_data = NULL;
2909 cm_event.private_data_len = 0;
2910
2911 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remove_addr=%08x\n",
2912 cm_event.local_addr.sin_addr.s_addr, cm_event.remote_addr.sin_addr.s_addr);
2913
2914 ret = cm_id->event_handler(cm_id, &cm_event);
2915 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2916 if (ret)
2917 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
2918 __FUNCTION__, __LINE__, ret);
2919 nes_rem_ref(&nesqp->ibqp);
2920 cm_id->rem_ref(cm_id);
2921
2922 return;
2923}
2924
2925
2926/**
2927 * cm_event_reset
2928 */
2929void cm_event_reset(struct nes_cm_event *event)
2930{
2931 struct nes_qp *nesqp;
2932 struct iw_cm_id *cm_id;
2933 struct iw_cm_event cm_event;
2934 /* struct nes_cm_info cm_info; */
2935 int ret;
2936
2937 if (!event->cm_node)
2938 return;
2939
2940 if (!event->cm_node->cm_id)
2941 return;
2942
2943 cm_id = event->cm_node->cm_id;
2944
2945 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
2946 nesqp = cm_id->provider_data;
2947
2948 nesqp->cm_id = NULL;
2949 /* cm_id->provider_data = NULL; */
2950 cm_event.event = IW_CM_EVENT_DISCONNECT;
2951 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2952 cm_event.provider_data = cm_id->provider_data;
2953 cm_event.local_addr = cm_id->local_addr;
2954 cm_event.remote_addr = cm_id->remote_addr;
2955 cm_event.private_data = NULL;
2956 cm_event.private_data_len = 0;
2957
2958 ret = cm_id->event_handler(cm_id, &cm_event);
2959 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2960
2961
2962 /* notify OF layer about this connection error event */
2963 cm_id->rem_ref(cm_id);
2964
2965 return;
2966}
2967
2968
2969/**
2970 * cm_event_mpa_req
2971 */
2972void cm_event_mpa_req(struct nes_cm_event *event)
2973{
2974 struct iw_cm_id *cm_id;
2975 struct iw_cm_event cm_event;
2976 int ret;
2977 struct nes_cm_node *cm_node;
2978
2979 cm_node = event->cm_node;
2980 if (!cm_node)
2981 return;
2982 cm_id = cm_node->cm_id;
2983
2984 atomic_inc(&cm_connect_reqs);
2985 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
2986 cm_node, cm_id, jiffies);
2987
2988 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
2989 cm_event.status = IW_CM_EVENT_STATUS_OK;
2990 cm_event.provider_data = (void *)cm_node;
2991
2992 cm_event.local_addr.sin_family = AF_INET;
2993 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
2994 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
2995
2996 cm_event.remote_addr.sin_family = AF_INET;
2997 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
2998 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
2999
3000 cm_event.private_data = cm_node->mpa_frame_buf;
3001 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3002
3003 ret = cm_id->event_handler(cm_id, &cm_event);
3004 if (ret)
3005 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
3006 __FUNCTION__, __LINE__, ret);
3007
3008 return;
3009}
3010
3011
3012static void nes_cm_event_handler(struct work_struct *);
3013
3014/**
3015 * nes_cm_post_event
3016 * post an event to the cm event handler
3017 */
3018int nes_cm_post_event(struct nes_cm_event *event)
3019{
3020 atomic_inc(&event->cm_node->cm_core->events_posted);
3021 add_ref_cm_node(event->cm_node);
3022 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3023 INIT_WORK(&event->event_work, nes_cm_event_handler);
3024 nes_debug(NES_DBG_CM, "queue_work, event=%p\n", event);
3025
3026 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3027
3028 nes_debug(NES_DBG_CM, "Exit\n");
3029 return 0;
3030}
3031
3032
3033/**
3034 * nes_cm_event_handler
3035 * worker function to handle cm events
3036 * will free instance of nes_cm_event
3037 */
3038static void nes_cm_event_handler(struct work_struct *work)
3039{
3040 struct nes_cm_event *event = container_of(work, struct nes_cm_event, event_work);
3041 struct nes_cm_core *cm_core;
3042
3043 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core)) {
3044 return;
3045 }
3046 cm_core = event->cm_node->cm_core;
3047 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3048 event, event->type, atomic_read(&cm_core->events_posted));
3049
3050 switch (event->type) {
3051 case NES_CM_EVENT_MPA_REQ:
3052 cm_event_mpa_req(event);
3053 nes_debug(NES_DBG_CM, "CM Event: MPA REQUEST\n");
3054 break;
3055 case NES_CM_EVENT_RESET:
3056 nes_debug(NES_DBG_CM, "CM Event: RESET\n");
3057 cm_event_reset(event);
3058 break;
3059 case NES_CM_EVENT_CONNECTED:
3060 if ((!event->cm_node->cm_id) ||
3061 (event->cm_node->state != NES_CM_STATE_TSA)) {
3062 break;
3063 }
3064 cm_event_connected(event);
3065 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3066 break;
3067 case NES_CM_EVENT_ABORTED:
3068 if ((!event->cm_node->cm_id) || (event->cm_node->state == NES_CM_STATE_TSA)) {
3069 break;
3070 }
3071 cm_event_connect_error(event);
3072 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3073 break;
3074 case NES_CM_EVENT_DROPPED_PKT:
3075 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3076 break;
3077 default:
3078 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3079 break;
3080 }
3081
3082 atomic_dec(&cm_core->events_posted);
3083 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3084 rem_ref_cm_node(cm_core, event->cm_node);
3085 kfree(event);
3086
3087 return;
3088}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-08 07:38:07 -0500