projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
RDMA/nes: Free kmap() resources
[deliverable/linux.git] / drivers / infiniband / hw / nes / nes_cm.c
CommitLineData
3c2d774c 1/*
fa6c87d5 2 * Copyright (c) 2006 - 2009 Intel Corporation. All rights reserved.
3c2d774c
GS		 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>
f2b2b59b 43#include <linux/if_vlan.h>
3c2d774c
GS		 44#include <linux/notifier.h>
45#include <linux/net.h>
46#include <linux/types.h>
47#include <linux/timer.h>
48#include <linux/time.h>
49#include <linux/delay.h>
50#include <linux/etherdevice.h>
51#include <linux/netdevice.h>
52#include <linux/random.h>
53#include <linux/list.h>
54#include <linux/threads.h>
d2fa9b26 55#include <linux/highmem.h>
7191a0a1 56#include <net/arp.h>
3c2d774c
GS		 57#include <net/neighbour.h>
58#include <net/route.h>
59#include <net/ip_fib.h>
c11470f9 60#include <net/tcp.h>
3c2d774c
GS		 61
62#include "nes.h"
63
64u32 cm_packets_sent;
65u32 cm_packets_bounced;
66u32 cm_packets_dropped;
67u32 cm_packets_retrans;
68u32 cm_packets_created;
69u32 cm_packets_received;
70u32 cm_listens_created;
71u32 cm_listens_destroyed;
72u32 cm_backlog_drops;
73atomic_t cm_loopbacks;
74atomic_t cm_nodes_created;
75atomic_t cm_nodes_destroyed;
76atomic_t cm_accel_dropped_pkts;
77atomic_t cm_resets_recvd;
78
6492cdf3
FL		 79static inline int mini_cm_accelerated(struct nes_cm_core *,
80 struct nes_cm_node *);
3c2d774c 81static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
6492cdf3 82 struct nes_vnic *, struct nes_cm_info *);
3c2d774c 83static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
1a855fbf 84static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
6492cdf3
FL		 85 struct nes_vnic *, u16, void *, struct nes_cm_info *);
86static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
1a855fbf 87static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
6492cdf3 88 struct nes_cm_node *);
1a855fbf 89static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
6492cdf3 90 struct nes_cm_node *);
4a14f6a7 91static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
6492cdf3 92 struct sk_buff *);
1a855fbf
RD		 93static int mini_cm_dealloc_core(struct nes_cm_core *);
94static int mini_cm_get(struct nes_cm_core *);
95static int mini_cm_set(struct nes_cm_core *, u32, u32);
6492cdf3 96
6098d107 97static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
6492cdf3 98 void *, u32, void *, u32, u8);
6492cdf3
FL		 99static int add_ref_cm_node(struct nes_cm_node *);
100static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
101
1a855fbf
RD		 102static int nes_cm_disconn_true(struct nes_qp *);
103static int nes_cm_post_event(struct nes_cm_event *event);
104static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
105static void nes_disconnect_worker(struct work_struct *work);
6492cdf3
FL		 106
107static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
9d5ab133 108static int send_mpa_reject(struct nes_cm_node *);
6492cdf3
FL		 109static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
110static int send_reset(struct nes_cm_node *, struct sk_buff *);
111static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
1a855fbf 112static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
6492cdf3
FL		 113static void process_packet(struct nes_cm_node *, struct sk_buff *,
114 struct nes_cm_core *);
115
116static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
117static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
118static void cleanup_retrans_entry(struct nes_cm_node *);
9d5ab133 119static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
6492cdf3
FL		 120static void free_retrans_entry(struct nes_cm_node *cm_node);
121static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
122 struct sk_buff *skb, int optionsize, int passive);
123
124/* CM event handler functions */
125static void cm_event_connected(struct nes_cm_event *);
126static void cm_event_connect_error(struct nes_cm_event *);
127static void cm_event_reset(struct nes_cm_event *);
128static void cm_event_mpa_req(struct nes_cm_event *);
9d5ab133
FL		 129static void cm_event_mpa_reject(struct nes_cm_event *);
130static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
6492cdf3
FL		 131
132static void print_core(struct nes_cm_core *core);
3c2d774c
GS		 133
134/* External CM API Interface */
135/* instance of function pointers for client API */
136/* set address of this instance to cm_core->cm_ops at cm_core alloc */
137static struct nes_cm_ops nes_cm_api = {
138 mini_cm_accelerated,
139 mini_cm_listen,
140 mini_cm_del_listen,
141 mini_cm_connect,
142 mini_cm_close,
143 mini_cm_accept,
144 mini_cm_reject,
145 mini_cm_recv_pkt,
146 mini_cm_dealloc_core,
147 mini_cm_get,
148 mini_cm_set
149};
150
1a855fbf 151static struct nes_cm_core *g_cm_core;
3c2d774c
GS		 152
153atomic_t cm_connects;
154atomic_t cm_accepts;
155atomic_t cm_disconnects;
156atomic_t cm_closes;
157atomic_t cm_connecteds;
158atomic_t cm_connect_reqs;
159atomic_t cm_rejects;
160
161
162/**
163 * create_event
164 */
165static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
166 enum nes_cm_event_type type)
167{
168 struct nes_cm_event *event;
169
170 if (!cm_node->cm_id)
171 return NULL;
172
173 /* allocate an empty event */
174 event = kzalloc(sizeof(*event), GFP_ATOMIC);
175
176 if (!event)
177 return NULL;
178
179 event->type = type;
180 event->cm_node = cm_node;
181 event->cm_info.rem_addr = cm_node->rem_addr;
182 event->cm_info.loc_addr = cm_node->loc_addr;
183 event->cm_info.rem_port = cm_node->rem_port;
184 event->cm_info.loc_port = cm_node->loc_port;
185 event->cm_info.cm_id = cm_node->cm_id;
186
6492cdf3
FL		 187 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
188 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
189 cm_node, event, type, event->cm_info.loc_addr,
190 event->cm_info.loc_port, event->cm_info.rem_addr,
191 event->cm_info.rem_port);
3c2d774c
GS		 192
193 nes_cm_post_event(event);
194 return event;
195}
196
197
198/**
199 * send_mpa_request
200 */
6492cdf3 201static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c 202{
3c2d774c 203 if (!skb) {
6492cdf3 204 nes_debug(NES_DBG_CM, "skb set to NULL\n");
3c2d774c
GS		 205 return -1;
206 }
207
208 /* send an MPA Request frame */
209 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
210 cm_node->mpa_frame_size, SET_ACK);
211
9d5ab133
FL		 212 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
213}
3c2d774c 214
9d5ab133
FL		 215
216
217static int send_mpa_reject(struct nes_cm_node *cm_node)
218{
219 struct sk_buff *skb = NULL;
220
221 skb = dev_alloc_skb(MAX_CM_BUFFER);
222 if (!skb) {
223 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
224 return -ENOMEM;
225 }
226
227 /* send an MPA reject frame */
228 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
229 cm_node->mpa_frame_size, SET_ACK | SET_FIN);
230
231 cm_node->state = NES_CM_STATE_FIN_WAIT1;
232 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
3c2d774c
GS		 233}
234
235
236/**
237 * recv_mpa - process a received TCP pkt, we are expecting an
238 * IETF MPA frame
239 */
9d5ab133
FL		 240static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
241 u32 len)
3c2d774c
GS		 242{
243 struct ietf_mpa_frame *mpa_frame;
244
9d5ab133
FL		 245 *type = NES_MPA_REQUEST_ACCEPT;
246
3c2d774c
GS		 247 /* assume req frame is in tcp data payload */
248 if (len < sizeof(struct ietf_mpa_frame)) {
249 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
9d5ab133 250 return -EINVAL;
3c2d774c
GS		 251 }
252
253 mpa_frame = (struct ietf_mpa_frame *)buffer;
254 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
1cf078c9
FL		 255 /* make sure mpa private data len is less than 512 bytes */
256 if (cm_node->mpa_frame_size > IETF_MAX_PRIV_DATA_LEN) {
257 nes_debug(NES_DBG_CM, "The received Length of Private"
258 " Data field exceeds 512 octets\n");
259 return -EINVAL;
260 }
261 /*
262 * make sure MPA receiver interoperate with the
263 * received MPA version and MPA key information
264 *
265 */
266 if (mpa_frame->rev != mpa_version) {
267 nes_debug(NES_DBG_CM, "The received mpa version"
268 " can not be interoperated\n");
269 return -EINVAL;
270 }
271 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
272 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
273 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
274 return -EINVAL;
275 }
276 } else {
277 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
278 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
279 return -EINVAL;
280 }
281 }
3c2d774c
GS		 282
283 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
284 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
285 " complete (%x + %x != %x)\n",
9d5ab133
FL		 286 cm_node->mpa_frame_size,
287 (u32)sizeof(struct ietf_mpa_frame), len);
288 return -EINVAL;
289 }
290 /* make sure it does not exceed the max size */
291 if (len > MAX_CM_BUFFER) {
292 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
293 " (%x + %x != %x)\n",
294 cm_node->mpa_frame_size,
295 (u32)sizeof(struct ietf_mpa_frame), len);
296 return -EINVAL;
3c2d774c
GS		 297 }
298
299 /* copy entire MPA frame to our cm_node's frame */
300 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
301 cm_node->mpa_frame_size);
302
9d5ab133
FL		 303 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
304 *type = NES_MPA_REQUEST_REJECT;
3c2d774c
GS		 305 return 0;
306}
307
308
3c2d774c
GS		 309/**
310 * form_cm_frame - get a free packet and build empty frame Use
311 * node info to build.
312 */
6098d107 313static void form_cm_frame(struct sk_buff *skb,
6492cdf3
FL		 314 struct nes_cm_node *cm_node, void *options, u32 optionsize,
315 void *data, u32 datasize, u8 flags)
3c2d774c
GS		 316{
317 struct tcphdr *tcph;
318 struct iphdr *iph;
319 struct ethhdr *ethh;
320 u8 *buf;
321 u16 packetsize = sizeof(*iph);
322
323 packetsize += sizeof(*tcph);
324 packetsize += optionsize + datasize;
325
326 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
327
328 skb->len = 0;
329 buf = skb_put(skb, packetsize + ETH_HLEN);
330
331 ethh = (struct ethhdr *) buf;
332 buf += ETH_HLEN;
333
334 iph = (struct iphdr *)buf;
335 buf += sizeof(*iph);
336 tcph = (struct tcphdr *)buf;
337 skb_reset_mac_header(skb);
338 skb_set_network_header(skb, ETH_HLEN);
339 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
340 buf += sizeof(*tcph);
341
342 skb->ip_summed = CHECKSUM_PARTIAL;
343 skb->protocol = htons(0x800);
344 skb->data_len = 0;
345 skb->mac_len = ETH_HLEN;
346
347 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
348 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
349 ethh->h_proto = htons(0x0800);
350
351 iph->version = IPVERSION;
352 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
353 iph->tos = 0;
354 iph->tot_len = htons(packetsize);
355 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
356
357 iph->frag_off = htons(0x4000);
358 iph->ttl = 0x40;
359 iph->protocol = 0x06; /* IPPROTO_TCP */
360
361 iph->saddr = htonl(cm_node->loc_addr);
362 iph->daddr = htonl(cm_node->rem_addr);
363
364 tcph->source = htons(cm_node->loc_port);
365 tcph->dest = htons(cm_node->rem_port);
366 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
367
368 if (flags & SET_ACK) {
369 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
370 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
371 tcph->ack = 1;
372 } else
373 tcph->ack_seq = 0;
374
375 if (flags & SET_SYN) {
376 cm_node->tcp_cntxt.loc_seq_num++;
377 tcph->syn = 1;
378 } else
6492cdf3 379 cm_node->tcp_cntxt.loc_seq_num += datasize;
3c2d774c 380
6492cdf3
FL		 381 if (flags & SET_FIN) {
382 cm_node->tcp_cntxt.loc_seq_num++;
3c2d774c 383 tcph->fin = 1;
6492cdf3 384 }
3c2d774c
GS		 385
386 if (flags & SET_RST)
387 tcph->rst = 1;
388
389 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
390 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
391 tcph->urg_ptr = 0;
392 if (optionsize)
393 memcpy(buf, options, optionsize);
394 buf += optionsize;
395 if (datasize)
396 memcpy(buf, data, datasize);
397
398 skb_shinfo(skb)->nr_frags = 0;
399 cm_packets_created++;
400
3c2d774c
GS		 401}
402
403
404/**
405 * print_core - dump a cm core
406 */
407static void print_core(struct nes_cm_core *core)
408{
409 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
410 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
411 if (!core)
412 return;
413 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
3c2d774c
GS		 414
415 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
416
3c2d774c
GS		 417 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
418 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
419
420 nes_debug(NES_DBG_CM, "core : %p \n", core);
421
422 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
423}
424
425
426/**
427 * schedule_nes_timer
428 * note - cm_node needs to be protected before calling this. Encase in:
429 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
430 */
431int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
432 enum nes_timer_type type, int send_retrans,
433 int close_when_complete)
434{
435 unsigned long flags;
6492cdf3 436 struct nes_cm_core *cm_core = cm_node->cm_core;
3c2d774c
GS		 437 struct nes_timer_entry *new_send;
438 int ret = 0;
439 u32 was_timer_set;
440
441 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
442 if (!new_send)
9d5ab133 443 return -ENOMEM;
3c2d774c
GS		 444
445 /* new_send->timetosend = currenttime */
446 new_send->retrycount = NES_DEFAULT_RETRYS;
447 new_send->retranscount = NES_DEFAULT_RETRANS;
448 new_send->skb = skb;
449 new_send->timetosend = jiffies;
450 new_send->type = type;
451 new_send->netdev = cm_node->netdev;
452 new_send->send_retrans = send_retrans;
453 new_send->close_when_complete = close_when_complete;
454
455 if (type == NES_TIMER_TYPE_CLOSE) {
6492cdf3 456 new_send->timetosend += (HZ/10);
9d5ab133 457 if (cm_node->recv_entry) {
79fc3d74 458 kfree(new_send);
9d5ab133
FL		 459 WARN_ON(1);
460 return -EINVAL;
461 }
462 cm_node->recv_entry = new_send;
3c2d774c
GS		 463 }
464
465 if (type == NES_TIMER_TYPE_SEND) {
b30db1c1 466 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
3c2d774c 467 atomic_inc(&new_send->skb->users);
6492cdf3
FL		 468 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
469 cm_node->send_entry = new_send;
470 add_ref_cm_node(cm_node);
471 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
472 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
3c2d774c
GS		 473
474 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
475 if (ret != NETDEV_TX_OK) {
6492cdf3
FL		 476 nes_debug(NES_DBG_CM, "Error sending packet %p "
477 "(jiffies = %lu)\n", new_send, jiffies);
3c2d774c 478 new_send->timetosend = jiffies;
5962c2c8 479 ret = NETDEV_TX_OK;
3c2d774c
GS		 480 } else {
481 cm_packets_sent++;
482 if (!send_retrans) {
6492cdf3 483 cleanup_retrans_entry(cm_node);
3c2d774c 484 if (close_when_complete)
6492cdf3 485 rem_ref_cm_node(cm_core, cm_node);
3c2d774c
GS		 486 return ret;
487 }
3c2d774c 488 }
3c2d774c 489 }
3c2d774c
GS		 490
491 was_timer_set = timer_pending(&cm_core->tcp_timer);
492
493 if (!was_timer_set) {
494 cm_core->tcp_timer.expires = new_send->timetosend;
495 add_timer(&cm_core->tcp_timer);
496 }
497
498 return ret;
499}
500
9d5ab133
FL		 501static void nes_retrans_expired(struct nes_cm_node *cm_node)
502{
68237a0f 503 struct iw_cm_id *cm_id = cm_node->cm_id;
9d5ab133
FL		 504 switch (cm_node->state) {
505 case NES_CM_STATE_SYN_RCVD:
506 case NES_CM_STATE_CLOSING:
507 rem_ref_cm_node(cm_node->cm_core, cm_node);
508 break;
509 case NES_CM_STATE_LAST_ACK:
510 case NES_CM_STATE_FIN_WAIT1:
68237a0f
FL		 511 if (cm_node->cm_id)
512 cm_id->rem_ref(cm_id);
513 cm_node->state = NES_CM_STATE_CLOSED;
9d5ab133
FL		 514 send_reset(cm_node, NULL);
515 break;
516 default:
69524e1a
FL		 517 add_ref_cm_node(cm_node);
518 send_reset(cm_node, NULL);
9d5ab133
FL		 519 create_event(cm_node, NES_CM_EVENT_ABORTED);
520 }
521}
522
523static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
524{
525 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
526 struct iw_cm_id *cm_id = cm_node->cm_id;
527 struct nes_qp *nesqp;
528 unsigned long qplockflags;
529
530 if (!recv_entry)
531 return;
532 nesqp = (struct nes_qp *)recv_entry->skb;
533 if (nesqp) {
534 spin_lock_irqsave(&nesqp->lock, qplockflags);
535 if (nesqp->cm_id) {
536 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
537 "refcount = %d: HIT A "
538 "NES_TIMER_TYPE_CLOSE with something "
539 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
540 atomic_read(&nesqp->refcount));
541 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
542 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
543 nesqp->ibqp_state = IB_QPS_ERR;
544 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
545 nes_cm_disconn(nesqp);
546 } else {
547 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
548 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
549 "refcount = %d: HIT A "
550 "NES_TIMER_TYPE_CLOSE with nothing "
551 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
552 atomic_read(&nesqp->refcount));
553 }
554 } else if (rem_node) {
555 /* TIME_WAIT state */
556 rem_ref_cm_node(cm_node->cm_core, cm_node);
557 }
558 if (cm_node->cm_id)
559 cm_id->rem_ref(cm_id);
560 kfree(recv_entry);
561 cm_node->recv_entry = NULL;
562}
3c2d774c
GS		 563
564/**
565 * nes_cm_timer_tick
566 */
1a855fbf 567static void nes_cm_timer_tick(unsigned long pass)
3c2d774c 568{
9d5ab133 569 unsigned long flags;
3c2d774c 570 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
3c2d774c
GS		 571 struct nes_cm_node *cm_node;
572 struct nes_timer_entry *send_entry, *recv_entry;
9d5ab133
FL		 573 struct list_head *list_core_temp;
574 struct list_head *list_node;
3c2d774c 575 struct nes_cm_core *cm_core = g_cm_core;
3c2d774c 576 u32 settimer = 0;
4e9c3900 577 unsigned long timetosend;
3c2d774c 578 int ret = NETDEV_TX_OK;
3c2d774c 579
879e5bd5
FL		 580 struct list_head timer_list;
581 INIT_LIST_HEAD(&timer_list);
3c2d774c
GS		 582 spin_lock_irqsave(&cm_core->ht_lock, flags);
583
6492cdf3 584 list_for_each_safe(list_node, list_core_temp,
879e5bd5 585 &cm_core->connected_nodes) {
3c2d774c 586 cm_node = container_of(list_node, struct nes_cm_node, list);
9d5ab133 587 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
879e5bd5
FL		 588 add_ref_cm_node(cm_node);
589 list_add(&cm_node->timer_entry, &timer_list);
590 }
591 }
592 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
593
594 list_for_each_safe(list_node, list_core_temp, &timer_list) {
595 cm_node = container_of(list_node, struct nes_cm_node,
596 timer_entry);
9d5ab133
FL		 597 recv_entry = cm_node->recv_entry;
598
599 if (recv_entry) {
6492cdf3
FL		 600 if (time_after(recv_entry->timetosend, jiffies)) {
601 if (nexttimeout > recv_entry->timetosend ||
9d5ab133 602 !settimer) {
3c2d774c
GS		 603 nexttimeout = recv_entry->timetosend;
604 settimer = 1;
605 }
9d5ab133
FL		 606 } else
607 handle_recv_entry(cm_node, 1);
3c2d774c 608 }
3c2d774c
GS		 609
610 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
6492cdf3
FL		 611 do {
612 send_entry = cm_node->send_entry;
613 if (!send_entry)
c5d321e5 614 break;
3c2d774c
GS		 615 if (time_after(send_entry->timetosend, jiffies)) {
616 if (cm_node->state != NES_CM_STATE_TSA) {
6492cdf3
FL		 617 if ((nexttimeout >
618 send_entry->timetosend) ||
619 !settimer) {
620 nexttimeout =
621 send_entry->timetosend;
3c2d774c
GS		 622 settimer = 1;
623 }
3c2d774c 624 } else {
6492cdf3 625 free_retrans_entry(cm_node);
3c2d774c 626 }
9d5ab133 627 break;
3c2d774c 628 }
6492cdf3
FL		 629
630 if ((cm_node->state == NES_CM_STATE_TSA) ||
631 (cm_node->state == NES_CM_STATE_CLOSED)) {
632 free_retrans_entry(cm_node);
c5d321e5 633 break;
3c2d774c
GS		 634 }
635
6492cdf3
FL		 636 if (!send_entry->retranscount ||
637 !send_entry->retrycount) {
3c2d774c 638 cm_packets_dropped++;
6492cdf3 639 free_retrans_entry(cm_node);
9d5ab133 640
6492cdf3
FL		 641 spin_unlock_irqrestore(
642 &cm_node->retrans_list_lock, flags);
9d5ab133
FL		 643 nes_retrans_expired(cm_node);
644 cm_node->state = NES_CM_STATE_CLOSED;
6492cdf3
FL		 645 spin_lock_irqsave(&cm_node->retrans_list_lock,
646 flags);
c5d321e5 647 break;
3c2d774c 648 }
3c2d774c
GS		 649 atomic_inc(&send_entry->skb->users);
650 cm_packets_retrans++;
6492cdf3
FL		 651 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
652 "for node %p, jiffies = %lu, time to send = "
653 "%lu, retranscount = %u, send_entry->seq_num = "
654 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
655 "0x%08X\n", send_entry, cm_node, jiffies,
656 send_entry->timetosend,
657 send_entry->retranscount,
658 send_entry->seq_num,
659 cm_node->tcp_cntxt.rem_ack_num);
660
661 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
662 flags);
3c2d774c 663 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
6492cdf3 664 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
3c2d774c 665 if (ret != NETDEV_TX_OK) {
6492cdf3
FL		 666 nes_debug(NES_DBG_CM, "rexmit failed for "
667 "node=%p\n", cm_node);
3c2d774c 668 cm_packets_bounced++;
3c2d774c
GS		 669 send_entry->retrycount--;
670 nexttimeout = jiffies + NES_SHORT_TIME;
671 settimer = 1;
c5d321e5 672 break;
3c2d774c
GS		 673 } else {
674 cm_packets_sent++;
675 }
6492cdf3
FL		 676 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
677 "%u, retry count = %u.\n",
678 send_entry->retranscount,
679 send_entry->retrycount);
3c2d774c
GS		 680 if (send_entry->send_retrans) {
681 send_entry->retranscount--;
4e9c3900
FL		 682 timetosend = (NES_RETRY_TIMEOUT <<
683 (NES_DEFAULT_RETRANS - send_entry->retranscount));
684
6492cdf3 685 send_entry->timetosend = jiffies +
4e9c3900 686 min(timetosend, NES_MAX_TIMEOUT);
6492cdf3
FL		 687 if (nexttimeout > send_entry->timetosend ||
688 !settimer) {
3c2d774c
GS		 689 nexttimeout = send_entry->timetosend;
690 settimer = 1;
691 }
3c2d774c
GS		 692 } else {
693 int close_when_complete;
6492cdf3
FL		 694 close_when_complete =
695 send_entry->close_when_complete;
696 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
697 cm_node, cm_node->state);
698 free_retrans_entry(cm_node);
699 if (close_when_complete)
700 rem_ref_cm_node(cm_node->cm_core,
701 cm_node);
3c2d774c 702 }
6492cdf3 703 } while (0);
3c2d774c 704
6492cdf3
FL		 705 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
706 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 707 }
3c2d774c
GS		 708
709 if (settimer) {
710 if (!timer_pending(&cm_core->tcp_timer)) {
711 cm_core->tcp_timer.expires = nexttimeout;
712 add_timer(&cm_core->tcp_timer);
713 }
714 }
715}
716
717
718/**
719 * send_syn
720 */
6492cdf3
FL		 721static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
722 struct sk_buff *skb)
3c2d774c
GS		 723{
724 int ret;
725 int flags = SET_SYN;
3c2d774c 726 char optionsbuffer[sizeof(struct option_mss) +
6492cdf3
FL		 727 sizeof(struct option_windowscale) + sizeof(struct option_base) +
728 TCP_OPTIONS_PADDING];
3c2d774c
GS		 729
730 int optionssize = 0;
731 /* Sending MSS option */
732 union all_known_options *options;
733
734 if (!cm_node)
735 return -EINVAL;
736
737 options = (union all_known_options *)&optionsbuffer[optionssize];
738 options->as_mss.optionnum = OPTION_NUMBER_MSS;
739 options->as_mss.length = sizeof(struct option_mss);
740 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
741 optionssize += sizeof(struct option_mss);
742
743 options = (union all_known_options *)&optionsbuffer[optionssize];
744 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
745 options->as_windowscale.length = sizeof(struct option_windowscale);
746 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
747 optionssize += sizeof(struct option_windowscale);
748
6492cdf3 749 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
3c2d774c
GS		 750 options = (union all_known_options *)&optionsbuffer[optionssize];
751 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
752 options->as_base.length = sizeof(struct option_base);
753 optionssize += sizeof(struct option_base);
754 /* we need the size to be a multiple of 4 */
755 options = (union all_known_options *)&optionsbuffer[optionssize];
756 options->as_end = 1;
757 optionssize += 1;
758 options = (union all_known_options *)&optionsbuffer[optionssize];
759 options->as_end = 1;
760 optionssize += 1;
761 }
762
763 options = (union all_known_options *)&optionsbuffer[optionssize];
764 options->as_end = OPTION_NUMBER_END;
765 optionssize += 1;
766
6492cdf3 767 if (!skb)
e189062a 768 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 769 if (!skb) {
770 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
771 return -1;
772 }
773
774 if (sendack)
775 flags |= SET_ACK;
776
777 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
778 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
779
780 return ret;
781}
782
783
784/**
785 * send_reset
786 */
6492cdf3 787static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 788{
789 int ret;
3c2d774c
GS		 790 int flags = SET_RST | SET_ACK;
791
6492cdf3 792 if (!skb)
e189062a 793 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 794 if (!skb) {
795 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
9d5ab133 796 return -ENOMEM;
3c2d774c
GS		 797 }
798
3c2d774c
GS		 799 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
800 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
801
802 return ret;
803}
804
805
806/**
807 * send_ack
808 */
6492cdf3 809static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 810{
811 int ret;
6492cdf3
FL		 812
813 if (!skb)
e189062a 814 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 815
816 if (!skb) {
817 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
818 return -1;
819 }
820
821 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
822 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
823
824 return ret;
825}
826
827
828/**
829 * send_fin
830 */
1a855fbf 831static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 832{
833 int ret;
834
835 /* if we didn't get a frame get one */
836 if (!skb)
e189062a 837 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 838
839 if (!skb) {
840 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
841 return -1;
842 }
843
844 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
845 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
846
847 return ret;
848}
849
850
3c2d774c
GS		 851/**
852 * find_node - find a cm node that matches the reference cm node
853 */
854static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
855 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
856{
857 unsigned long flags;
3c2d774c
GS		 858 struct list_head *hte;
859 struct nes_cm_node *cm_node;
860
3c2d774c
GS		 861 /* get a handle on the hte */
862 hte = &cm_core->connected_nodes;
863
3c2d774c
GS		 864 /* walk list and find cm_node associated with this session ID */
865 spin_lock_irqsave(&cm_core->ht_lock, flags);
4e96a774 866 list_for_each_entry(cm_node, hte, list) {
3c2d774c
GS		 867 /* compare quad, return node handle if a match */
868 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
869 cm_node->loc_addr, cm_node->loc_port,
870 loc_addr, loc_port,
871 cm_node->rem_addr, cm_node->rem_port,
872 rem_addr, rem_port);
873 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
874 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
875 add_ref_cm_node(cm_node);
876 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
877 return cm_node;
878 }
879 }
880 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
881
882 /* no owner node */
883 return NULL;
884}
885
886
887/**
888 * find_listener - find a cm node listening on this addr-port pair
889 */
890static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
891 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
892{
893 unsigned long flags;
3c2d774c
GS		 894 struct nes_cm_listener *listen_node;
895
896 /* walk list and find cm_node associated with this session ID */
897 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4e96a774 898 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
3c2d774c
GS		 899 /* compare node pair, return node handle if a match */
900 if (((listen_node->loc_addr == dst_addr) ||
901 listen_node->loc_addr == 0x00000000) &&
902 (listen_node->loc_port == dst_port) &&
903 (listener_state & listen_node->listener_state)) {
904 atomic_inc(&listen_node->ref_count);
905 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
906 return listen_node;
907 }
908 }
909 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
910
3c2d774c
GS		 911 /* no listener */
912 return NULL;
913}
914
915
916/**
917 * add_hte_node - add a cm node to the hash table
918 */
919static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
920{
921 unsigned long flags;
3c2d774c
GS		 922 struct list_head *hte;
923
924 if (!cm_node || !cm_core)
925 return -EINVAL;
926
6492cdf3
FL		 927 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
928 cm_node);
3c2d774c 929
3c2d774c
GS		 930 spin_lock_irqsave(&cm_core->ht_lock, flags);
931
932 /* get a handle on the hash table element (list head for this slot) */
933 hte = &cm_core->connected_nodes;
934 list_add_tail(&cm_node->list, hte);
935 atomic_inc(&cm_core->ht_node_cnt);
936
937 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
938
939 return 0;
940}
941
942
943/**
944 * mini_cm_dec_refcnt_listen
945 */
946static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
6492cdf3 947 struct nes_cm_listener *listener, int free_hanging_nodes)
3c2d774c 948{
9d5ab133
FL		 949 int ret = -EINVAL;
950 int err = 0;
3c2d774c 951 unsigned long flags;
6492cdf3
FL		 952 struct list_head *list_pos = NULL;
953 struct list_head *list_temp = NULL;
954 struct nes_cm_node *cm_node = NULL;
879e5bd5 955 struct list_head reset_list;
6492cdf3
FL		 956
957 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
958 "refcnt=%d\n", listener, free_hanging_nodes,
959 atomic_read(&listener->ref_count));
960 /* free non-accelerated child nodes for this listener */
879e5bd5 961 INIT_LIST_HEAD(&reset_list);
6492cdf3
FL		 962 if (free_hanging_nodes) {
963 spin_lock_irqsave(&cm_core->ht_lock, flags);
964 list_for_each_safe(list_pos, list_temp,
879e5bd5 965 &g_cm_core->connected_nodes) {
6492cdf3
FL		 966 cm_node = container_of(list_pos, struct nes_cm_node,
967 list);
968 if ((cm_node->listener == listener) &&
879e5bd5
FL		 969 (!cm_node->accelerated)) {
970 add_ref_cm_node(cm_node);
971 list_add(&cm_node->reset_entry, &reset_list);
6492cdf3
FL		 972 }
973 }
974 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
975 }
879e5bd5
FL		 976
977 list_for_each_safe(list_pos, list_temp, &reset_list) {
978 cm_node = container_of(list_pos, struct nes_cm_node,
9d5ab133
FL		 979 reset_entry);
980 {
981 struct nes_cm_node *loopback = cm_node->loopbackpartner;
c5a7d489 982 enum nes_cm_node_state old_state;
9d5ab133
FL		 983 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
984 rem_ref_cm_node(cm_node->cm_core, cm_node);
985 } else {
986 if (!loopback) {
987 cleanup_retrans_entry(cm_node);
988 err = send_reset(cm_node, NULL);
989 if (err) {
990 cm_node->state =
991 NES_CM_STATE_CLOSED;
992 WARN_ON(1);
993 } else {
c5a7d489
FL		 994 old_state = cm_node->state;
995 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
996 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
997 rem_ref_cm_node(
998 cm_node->cm_core,
999 cm_node);
9d5ab133
FL		 1000 }
1001 } else {
1002 struct nes_cm_event event;
1003
1004 event.cm_node = loopback;
1005 event.cm_info.rem_addr =
1006 loopback->rem_addr;
1007 event.cm_info.loc_addr =
1008 loopback->loc_addr;
1009 event.cm_info.rem_port =
1010 loopback->rem_port;
1011 event.cm_info.loc_port =
1012 loopback->loc_port;
1013 event.cm_info.cm_id = loopback->cm_id;
1014 cm_event_connect_error(&event);
c5a7d489 1015 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
9d5ab133
FL		 1016 loopback->state = NES_CM_STATE_CLOSED;
1017
9d5ab133
FL		 1018 rem_ref_cm_node(cm_node->cm_core,
1019 cm_node);
1020
1021 }
1022 }
1023 }
879e5bd5
FL		 1024 }
1025
3c2d774c
GS		 1026 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1027 if (!atomic_dec_return(&listener->ref_count)) {
1028 list_del(&listener->list);
1029
1030 /* decrement our listen node count */
1031 atomic_dec(&cm_core->listen_node_cnt);
1032
1033 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1034
1035 if (listener->nesvnic) {
1036 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1037 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1038 }
1039
1040 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1041
1042 kfree(listener);
a2e9c384 1043 listener = NULL;
3c2d774c
GS		 1044 ret = 0;
1045 cm_listens_destroyed++;
1046 } else {
1047 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1048 }
1049 if (listener) {
1050 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1051 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1052 " with non-zero pending accepts=%u\n",
1053 listener, atomic_read(&listener->pend_accepts_cnt));
1054 }
1055
1056 return ret;
1057}
1058
1059
1060/**
1061 * mini_cm_del_listen
1062 */
1063static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1064 struct nes_cm_listener *listener)
1065{
1066 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1067 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1068 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1069}
1070
1071
1072/**
1073 * mini_cm_accelerated
1074 */
1075static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1076 struct nes_cm_node *cm_node)
1077{
1078 u32 was_timer_set;
1079 cm_node->accelerated = 1;
1080
1081 if (cm_node->accept_pend) {
1082 BUG_ON(!cm_node->listener);
1083 atomic_dec(&cm_node->listener->pend_accepts_cnt);
9d5ab133 1084 cm_node->accept_pend = 0;
3c2d774c
GS		 1085 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1086 }
1087
1088 was_timer_set = timer_pending(&cm_core->tcp_timer);
1089 if (!was_timer_set) {
1090 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1091 add_timer(&cm_core->tcp_timer);
1092 }
1093
1094 return 0;
1095}
1096
1097
1098/**
7191a0a1 1099 * nes_addr_resolve_neigh
3c2d774c 1100 */
7191a0a1 1101static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
3c2d774c
GS		 1102{
1103 struct rtable *rt;
1104 struct flowi fl;
7191a0a1
BS		 1105 struct neighbour *neigh;
1106 int rc = -1;
3c2d774c
GS		 1107
1108 memset(&fl, 0, sizeof fl);
1109 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1110 if (ip_route_output_key(&init_net, &rt, &fl)) {
9d5ab133 1111 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
33718363 1112 __func__, dst_ip);
7191a0a1 1113 return rc;
3c2d774c
GS		 1114 }
1115
7191a0a1
BS		 1116 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1117 if (neigh) {
1118 if (neigh->nud_state & NUD_VALID) {
1119 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
e174961c
JB		 1120 " is %pM, Gateway is 0x%08X \n", dst_ip,
1121 neigh->ha, ntohl(rt->rt_gateway));
7191a0a1
BS		 1122 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1123 dst_ip, NES_ARP_ADD);
1124 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1125 NES_ARP_RESOLVE);
1126 }
1127 neigh_release(neigh);
1128 }
1129
1130 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1131 neigh_event_send(rt->u.dst.neighbour, NULL);
1132
3c2d774c 1133 ip_rt_put(rt);
7191a0a1 1134 return rc;
3c2d774c
GS		 1135}
1136
1137
1138/**
1139 * make_cm_node - create a new instance of a cm node
1140 */
1141static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1142 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1143 struct nes_cm_listener *listener)
1144{
1145 struct nes_cm_node *cm_node;
1146 struct timespec ts;
1147 int arpindex = 0;
1148 struct nes_device *nesdev;
1149 struct nes_adapter *nesadapter;
1150
1151 /* create an hte and cm_node for this instance */
1152 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1153 if (!cm_node)
1154 return NULL;
1155
1156 /* set our node specific transport info */
1157 cm_node->loc_addr = cm_info->loc_addr;
1158 cm_node->rem_addr = cm_info->rem_addr;
1159 cm_node->loc_port = cm_info->loc_port;
1160 cm_node->rem_port = cm_info->rem_port;
1161 cm_node->send_write0 = send_first;
63779436
HH		 1162 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1163 &cm_node->loc_addr, cm_node->loc_port,
1164 &cm_node->rem_addr, cm_node->rem_port);
3c2d774c
GS		 1165 cm_node->listener = listener;
1166 cm_node->netdev = nesvnic->netdev;
1167 cm_node->cm_id = cm_info->cm_id;
1168 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1169
6492cdf3
FL		 1170 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1171 cm_node->cm_id);
3c2d774c 1172
3c2d774c 1173 spin_lock_init(&cm_node->retrans_list_lock);
3c2d774c
GS		 1174
1175 cm_node->loopbackpartner = NULL;
1176 atomic_set(&cm_node->ref_count, 1);
1177 /* associate our parent CM core */
1178 cm_node->cm_core = cm_core;
1179 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1180 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1181 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1182 NES_CM_DEFAULT_RCV_WND_SCALE;
1183 ts = current_kernel_time();
1184 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1185 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
f2b2b59b 1186 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
3c2d774c
GS		 1187 cm_node->tcp_cntxt.rcv_nxt = 0;
1188 /* get a unique session ID , add thread_id to an upcounter to handle race */
1189 atomic_inc(&cm_core->node_cnt);
3c2d774c
GS		 1190 cm_node->conn_type = cm_info->conn_type;
1191 cm_node->apbvt_set = 0;
1192 cm_node->accept_pend = 0;
1193
1194 cm_node->nesvnic = nesvnic;
1195 /* get some device handles, for arp lookup */
1196 nesdev = nesvnic->nesdev;
1197 nesadapter = nesdev->nesadapter;
1198
1199 cm_node->loopbackpartner = NULL;
1200 /* get the mac addr for the remote node */
1ee86555
CT		 1201 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1202 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1203 else
1204 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
3c2d774c 1205 if (arpindex < 0) {
7191a0a1
BS		 1206 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1207 if (arpindex < 0) {
1208 kfree(cm_node);
1209 return NULL;
1210 }
3c2d774c
GS		 1211 }
1212
1213 /* copy the mac addr to node context */
1214 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
e174961c
JB		 1215 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1216 cm_node->rem_mac);
3c2d774c
GS		 1217
1218 add_hte_node(cm_core, cm_node);
1219 atomic_inc(&cm_nodes_created);
1220
1221 return cm_node;
1222}
1223
1224
1225/**
1226 * add_ref_cm_node - destroy an instance of a cm node
1227 */
1228static int add_ref_cm_node(struct nes_cm_node *cm_node)
1229{
1230 atomic_inc(&cm_node->ref_count);
1231 return 0;
1232}
1233
1234
1235/**
1236 * rem_ref_cm_node - destroy an instance of a cm node
1237 */
1238static int rem_ref_cm_node(struct nes_cm_core *cm_core,
6492cdf3 1239 struct nes_cm_node *cm_node)
3c2d774c 1240{
9d5ab133 1241 unsigned long flags;
3c2d774c
GS		 1242 struct nes_qp *nesqp;
1243
1244 if (!cm_node)
1245 return -EINVAL;
1246
1247 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1248 if (atomic_dec_return(&cm_node->ref_count)) {
1249 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1250 return 0;
1251 }
1252 list_del(&cm_node->list);
1253 atomic_dec(&cm_core->ht_node_cnt);
1254 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1255
1256 /* if the node is destroyed before connection was accelerated */
1257 if (!cm_node->accelerated && cm_node->accept_pend) {
1258 BUG_ON(!cm_node->listener);
1259 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1260 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1261 }
9d5ab133
FL		 1262 WARN_ON(cm_node->send_entry);
1263 if (cm_node->recv_entry)
1264 handle_recv_entry(cm_node, 0);
3c2d774c
GS		 1265 if (cm_node->listener) {
1266 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1267 } else {
1268 if (cm_node->apbvt_set && cm_node->nesvnic) {
1269 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
6492cdf3
FL		 1270 PCI_FUNC(
1271 cm_node->nesvnic->nesdev->pcidev->devfn),
1272 NES_MANAGE_APBVT_DEL);
3c2d774c
GS		 1273 }
1274 }
1275
3c2d774c
GS		 1276 atomic_dec(&cm_core->node_cnt);
1277 atomic_inc(&cm_nodes_destroyed);
6492cdf3
FL		 1278 nesqp = cm_node->nesqp;
1279 if (nesqp) {
1280 nesqp->cm_node = NULL;
1281 nes_rem_ref(&nesqp->ibqp);
1282 cm_node->nesqp = NULL;
1283 }
3c2d774c 1284
6492cdf3 1285 kfree(cm_node);
3c2d774c
GS		 1286 return 0;
1287}
1288
3c2d774c
GS		 1289/**
1290 * process_options
1291 */
6492cdf3
FL		 1292static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1293 u32 optionsize, u32 syn_packet)
3c2d774c
GS		 1294{
1295 u32 tmp;
1296 u32 offset = 0;
1297 union all_known_options *all_options;
1298 char got_mss_option = 0;
1299
1300 while (offset < optionsize) {
1301 all_options = (union all_known_options *)(optionsloc + offset);
1302 switch (all_options->as_base.optionnum) {
6492cdf3
FL		 1303 case OPTION_NUMBER_END:
1304 offset = optionsize;
1305 break;
1306 case OPTION_NUMBER_NONE:
1307 offset += 1;
1308 continue;
1309 case OPTION_NUMBER_MSS:
1310 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1311 "Size: %d\n", __func__,
1312 all_options->as_mss.length, offset, optionsize);
1313 got_mss_option = 1;
1314 if (all_options->as_mss.length != 4) {
1315 return 1;
1316 } else {
1317 tmp = ntohs(all_options->as_mss.mss);
1318 if (tmp > 0 && tmp <
1319 cm_node->tcp_cntxt.mss)
1320 cm_node->tcp_cntxt.mss = tmp;
1321 }
1322 break;
1323 case OPTION_NUMBER_WINDOW_SCALE:
1324 cm_node->tcp_cntxt.snd_wscale =
1325 all_options->as_windowscale.shiftcount;
1326 break;
1327 case OPTION_NUMBER_WRITE0:
1328 cm_node->send_write0 = 1;
1329 break;
1330 default:
1331 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1332 all_options->as_base.optionnum);
1333 break;
3c2d774c
GS		 1334 }
1335 offset += all_options->as_base.length;
1336 }
1337 if ((!got_mss_option) && (syn_packet))
1338 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1339 return 0;
1340}
1341
6492cdf3
FL		 1342static void drop_packet(struct sk_buff *skb)
1343{
1344 atomic_inc(&cm_accel_dropped_pkts);
1345 dev_kfree_skb_any(skb);
1346}
3c2d774c 1347
9d5ab133 1348static void handle_fin_pkt(struct nes_cm_node *cm_node)
3c2d774c 1349{
6492cdf3
FL		 1350 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1351 "refcnt=%d\n", cm_node, cm_node->state,
1352 atomic_read(&cm_node->ref_count));
6492cdf3
FL		 1353 switch (cm_node->state) {
1354 case NES_CM_STATE_SYN_RCVD:
1355 case NES_CM_STATE_SYN_SENT:
1356 case NES_CM_STATE_ESTABLISHED:
1357 case NES_CM_STATE_MPAREQ_SENT:
9d5ab133 1358 case NES_CM_STATE_MPAREJ_RCVD:
109d67e4
FL		 1359 cm_node->tcp_cntxt.rcv_nxt++;
1360 cleanup_retrans_entry(cm_node);
6492cdf3 1361 cm_node->state = NES_CM_STATE_LAST_ACK;
9d5ab133 1362 send_fin(cm_node, NULL);
6492cdf3
FL		 1363 break;
1364 case NES_CM_STATE_FIN_WAIT1:
109d67e4
FL		 1365 cm_node->tcp_cntxt.rcv_nxt++;
1366 cleanup_retrans_entry(cm_node);
6492cdf3 1367 cm_node->state = NES_CM_STATE_CLOSING;
9d5ab133
FL		 1368 send_ack(cm_node, NULL);
1369 /* Wait for ACK as this is simultanous close..
1370 * After we receive ACK, do not send anything..
1371 * Just rm the node.. Done.. */
6492cdf3
FL		 1372 break;
1373 case NES_CM_STATE_FIN_WAIT2:
109d67e4
FL		 1374 cm_node->tcp_cntxt.rcv_nxt++;
1375 cleanup_retrans_entry(cm_node);
6492cdf3 1376 cm_node->state = NES_CM_STATE_TIME_WAIT;
9d5ab133
FL		 1377 send_ack(cm_node, NULL);
1378 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1379 break;
1380 case NES_CM_STATE_TIME_WAIT:
109d67e4
FL		 1381 cm_node->tcp_cntxt.rcv_nxt++;
1382 cleanup_retrans_entry(cm_node);
6492cdf3 1383 cm_node->state = NES_CM_STATE_CLOSED;
9d5ab133 1384 rem_ref_cm_node(cm_node->cm_core, cm_node);
6492cdf3
FL		 1385 break;
1386 case NES_CM_STATE_TSA:
1387 default:
1388 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1389 cm_node, cm_node->state);
6492cdf3 1390 break;
3c2d774c 1391 }
6492cdf3 1392}
3c2d774c 1393
3c2d774c 1394
6492cdf3
FL		 1395static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1396 struct tcphdr *tcph)
1397{
3c2d774c 1398
6492cdf3 1399 int reset = 0; /* whether to send reset in case of err.. */
183ecfa3 1400 int passive_state;
6492cdf3
FL		 1401 atomic_inc(&cm_resets_recvd);
1402 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1403 " refcnt=%d\n", cm_node, cm_node->state,
1404 atomic_read(&cm_node->ref_count));
1405 cleanup_retrans_entry(cm_node);
1406 switch (cm_node->state) {
1407 case NES_CM_STATE_SYN_SENT:
1408 case NES_CM_STATE_MPAREQ_SENT:
1409 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1410 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1411 cm_node->listener, cm_node->state);
1412 active_open_err(cm_node, skb, reset);
1413 break;
183ecfa3
FL		 1414 case NES_CM_STATE_MPAREQ_RCVD:
1415 passive_state = atomic_add_return(1, &cm_node->passive_state);
1416 if (passive_state == NES_SEND_RESET_EVENT)
1417 create_event(cm_node, NES_CM_EVENT_RESET);
183ecfa3
FL		 1418 cm_node->state = NES_CM_STATE_CLOSED;
1419 dev_kfree_skb_any(skb);
1420 break;
6492cdf3
FL		 1421 case NES_CM_STATE_ESTABLISHED:
1422 case NES_CM_STATE_SYN_RCVD:
1423 case NES_CM_STATE_LISTENING:
1424 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1425 passive_open_err(cm_node, skb, reset);
1426 break;
1427 case NES_CM_STATE_TSA:
183ecfa3
FL		 1428 active_open_err(cm_node, skb, reset);
1429 break;
1430 case NES_CM_STATE_CLOSED:
183ecfa3
FL		 1431 drop_packet(skb);
1432 break;
68237a0f 1433 case NES_CM_STATE_FIN_WAIT1:
109d67e4
FL		 1434 case NES_CM_STATE_LAST_ACK:
1435 cm_node->cm_id->rem_ref(cm_node->cm_id);
9d5ab133 1436 case NES_CM_STATE_TIME_WAIT:
9d5ab133
FL		 1437 cm_node->state = NES_CM_STATE_CLOSED;
1438 rem_ref_cm_node(cm_node->cm_core, cm_node);
1439 drop_packet(skb);
1440 break;
6492cdf3 1441 default:
183ecfa3 1442 drop_packet(skb);
6492cdf3
FL		 1443 break;
1444 }
1445}
3c2d774c 1446
9d5ab133
FL		 1447
1448static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
6492cdf3
FL		 1449{
1450
9d5ab133 1451 int ret = 0;
6492cdf3
FL		 1452 int datasize = skb->len;
1453 u8 *dataloc = skb->data;
9d5ab133
FL		 1454
1455 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1456 u32 res_type;
1457 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1458 if (ret) {
6492cdf3 1459 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
9d5ab133 1460 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
6492cdf3
FL		 1461 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1462 "cm_node=%p listener=%p state=%d\n", __func__,
1463 __LINE__, cm_node, cm_node->listener,
1464 cm_node->state);
1465 active_open_err(cm_node, skb, 1);
1466 } else {
1467 passive_open_err(cm_node, skb, 1);
3c2d774c 1468 }
9d5ab133
FL		 1469 return;
1470 }
1471
1472 switch (cm_node->state) {
1473 case NES_CM_STATE_ESTABLISHED:
1474 if (res_type == NES_MPA_REQUEST_REJECT) {
1475 /*BIG problem as we are receiving the MPA.. So should
1476 * not be REJECT.. This is Passive Open.. We can
1477 * only receive it Reject for Active Open...*/
1478 WARN_ON(1);
1479 }
1480 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1481 type = NES_CM_EVENT_MPA_REQ;
1482 atomic_set(&cm_node->passive_state,
1483 NES_PASSIVE_STATE_INDICATED);
1484 break;
1485 case NES_CM_STATE_MPAREQ_SENT:
109d67e4 1486 cleanup_retrans_entry(cm_node);
9d5ab133
FL		 1487 if (res_type == NES_MPA_REQUEST_REJECT) {
1488 type = NES_CM_EVENT_MPA_REJECT;
1489 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1490 } else {
1491 type = NES_CM_EVENT_CONNECTED;
6492cdf3 1492 cm_node->state = NES_CM_STATE_TSA;
9d5ab133 1493 }
6492cdf3 1494
9d5ab133
FL		 1495 break;
1496 default:
1497 WARN_ON(1);
1498 break;
6492cdf3 1499 }
9d5ab133
FL		 1500 dev_kfree_skb_any(skb);
1501 create_event(cm_node, type);
6492cdf3
FL		 1502}
1503
1504static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1505{
1506 switch (cm_node->state) {
1507 case NES_CM_STATE_SYN_SENT:
1508 case NES_CM_STATE_MPAREQ_SENT:
1509 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1510 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1511 cm_node->listener, cm_node->state);
1512 active_open_err(cm_node, skb, 1);
1513 break;
1514 case NES_CM_STATE_ESTABLISHED:
1515 case NES_CM_STATE_SYN_RCVD:
1516 passive_open_err(cm_node, skb, 1);
1517 break;
1518 case NES_CM_STATE_TSA:
1519 default:
1520 drop_packet(skb);
3c2d774c 1521 }
6492cdf3
FL		 1522}
1523
1524static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1525 struct sk_buff *skb)
1526{
1527 int err;
1528
1529 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1530 if (err)
1531 active_open_err(cm_node, skb, 1);
1532
1533 return err;
1534}
1535
1536static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1537 struct sk_buff *skb)
1538{
1539 int err = 0;
1540 u32 seq;
1541 u32 ack_seq;
1542 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1543 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1544 u32 rcv_wnd;
1545 seq = ntohl(tcph->seq);
1546 ack_seq = ntohl(tcph->ack_seq);
1547 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1548 if (ack_seq != loc_seq_num)
1549 err = 1;
c11470f9 1550 else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
6492cdf3
FL		 1551 err = 1;
1552 if (err) {
1553 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1554 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1555 cm_node->listener, cm_node->state);
1556 indicate_pkt_err(cm_node, skb);
1557 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1558 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1559 rcv_wnd);
1560 }
1561 return err;
1562}
1563
1564/*
1565 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1566 * is created with a listener or it may comein as rexmitted packet which in
1567 * that case will be just dropped.
1568 */
1569
1570static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1571 struct tcphdr *tcph)
1572{
1573 int ret;
1574 u32 inc_sequence;
1575 int optionsize;
3c2d774c
GS		 1576
1577 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 1578 skb_trim(skb, 0);
6492cdf3 1579 inc_sequence = ntohl(tcph->seq);
3c2d774c 1580
6492cdf3
FL		 1581 switch (cm_node->state) {
1582 case NES_CM_STATE_SYN_SENT:
1583 case NES_CM_STATE_MPAREQ_SENT:
1584 /* Rcvd syn on active open connection*/
1585 active_open_err(cm_node, skb, 1);
1586 break;
1587 case NES_CM_STATE_LISTENING:
1588 /* Passive OPEN */
6492cdf3
FL		 1589 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1590 cm_node->listener->backlog) {
1591 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1592 "pressure \n");
1593 cm_backlog_drops++;
1594 passive_open_err(cm_node, skb, 0);
1595 break;
1596 }
1597 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1598 1);
1599 if (ret) {
1600 passive_open_err(cm_node, skb, 0);
1601 /* drop pkt */
1602 break;
1603 }
1604 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1605 BUG_ON(cm_node->send_entry);
9d5ab133
FL		 1606 cm_node->accept_pend = 1;
1607 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1608
6492cdf3
FL		 1609 cm_node->state = NES_CM_STATE_SYN_RCVD;
1610 send_syn(cm_node, 1, skb);
1611 break;
abb77256
FL		 1612 case NES_CM_STATE_CLOSED:
1613 cleanup_retrans_entry(cm_node);
886f98a3 1614 add_ref_cm_node(cm_node);
abb77256
FL		 1615 send_reset(cm_node, skb);
1616 break;
6492cdf3
FL		 1617 case NES_CM_STATE_TSA:
1618 case NES_CM_STATE_ESTABLISHED:
1619 case NES_CM_STATE_FIN_WAIT1:
1620 case NES_CM_STATE_FIN_WAIT2:
1621 case NES_CM_STATE_MPAREQ_RCVD:
1622 case NES_CM_STATE_LAST_ACK:
1623 case NES_CM_STATE_CLOSING:
1624 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 1625 default:
1626 drop_packet(skb);
1627 break;
1628 }
1629}
1630
1631static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1632 struct tcphdr *tcph)
1633{
1634
1635 int ret;
1636 u32 inc_sequence;
1637 int optionsize;
1638
1639 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 1640 skb_trim(skb, 0);
6492cdf3
FL		 1641 inc_sequence = ntohl(tcph->seq);
1642 switch (cm_node->state) {
1643 case NES_CM_STATE_SYN_SENT:
9d5ab133 1644 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 1645 /* active open */
1646 if (check_syn(cm_node, tcph, skb))
1647 return;
1648 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1649 /* setup options */
1650 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1651 if (ret) {
1652 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1653 cm_node);
1654 break;
1655 }
1656 cleanup_retrans_entry(cm_node);
1657 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1658 send_mpa_request(cm_node, skb);
1659 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1660 break;
1661 case NES_CM_STATE_MPAREQ_RCVD:
1662 /* passive open, so should not be here */
1663 passive_open_err(cm_node, skb, 1);
1664 break;
abb77256 1665 case NES_CM_STATE_LISTENING:
886f98a3
FL		 1666 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1667 cleanup_retrans_entry(cm_node);
1668 cm_node->state = NES_CM_STATE_CLOSED;
1669 send_reset(cm_node, skb);
1670 break;
abb77256
FL		 1671 case NES_CM_STATE_CLOSED:
1672 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1673 cleanup_retrans_entry(cm_node);
886f98a3 1674 add_ref_cm_node(cm_node);
abb77256
FL		 1675 send_reset(cm_node, skb);
1676 break;
6492cdf3
FL		 1677 case NES_CM_STATE_ESTABLISHED:
1678 case NES_CM_STATE_FIN_WAIT1:
1679 case NES_CM_STATE_FIN_WAIT2:
1680 case NES_CM_STATE_LAST_ACK:
1681 case NES_CM_STATE_TSA:
1682 case NES_CM_STATE_CLOSING:
1683 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 1684 case NES_CM_STATE_MPAREQ_SENT:
1685 default:
1686 drop_packet(skb);
1687 break;
1688 }
1689}
3c2d774c 1690
109d67e4 1691static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
6492cdf3
FL		 1692 struct tcphdr *tcph)
1693{
1694 int datasize = 0;
1695 u32 inc_sequence;
1696 u32 rem_seq_ack;
1697 u32 rem_seq;
109d67e4 1698 int ret = 0;
abb77256 1699 int optionsize;
abb77256 1700 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 1701
6492cdf3 1702 if (check_seq(cm_node, tcph, skb))
109d67e4 1703 return -EINVAL;
6492cdf3
FL		 1704
1705 skb_pull(skb, tcph->doff << 2);
3c2d774c 1706 inc_sequence = ntohl(tcph->seq);
6492cdf3
FL		 1707 rem_seq = ntohl(tcph->seq);
1708 rem_seq_ack = ntohl(tcph->ack_seq);
1709 datasize = skb->len;
6492cdf3
FL		 1710 switch (cm_node->state) {
1711 case NES_CM_STATE_SYN_RCVD:
1712 /* Passive OPEN */
109d67e4 1713 cleanup_retrans_entry(cm_node);
abb77256
FL		 1714 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1715 if (ret)
1716 break;
6492cdf3
FL		 1717 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1718 cm_node->state = NES_CM_STATE_ESTABLISHED;
1719 if (datasize) {
1720 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 1721 handle_rcv_mpa(cm_node, skb);
109d67e4 1722 } else /* rcvd ACK only */
6492cdf3 1723 dev_kfree_skb_any(skb);
6492cdf3
FL		 1724 break;
1725 case NES_CM_STATE_ESTABLISHED:
1726 /* Passive OPEN */
9d5ab133 1727 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 1728 if (datasize) {
1729 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 1730 handle_rcv_mpa(cm_node, skb);
6492cdf3
FL		 1731 } else
1732 drop_packet(skb);
1733 break;
1734 case NES_CM_STATE_MPAREQ_SENT:
1735 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1736 if (datasize) {
1737 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 1738 handle_rcv_mpa(cm_node, skb);
109d67e4 1739 } else /* Could be just an ack pkt.. */
6492cdf3 1740 dev_kfree_skb_any(skb);
6492cdf3 1741 break;
abb77256 1742 case NES_CM_STATE_LISTENING:
886f98a3
FL		 1743 cleanup_retrans_entry(cm_node);
1744 cm_node->state = NES_CM_STATE_CLOSED;
1745 send_reset(cm_node, skb);
1746 break;
abb77256
FL		 1747 case NES_CM_STATE_CLOSED:
1748 cleanup_retrans_entry(cm_node);
886f98a3 1749 add_ref_cm_node(cm_node);
abb77256
FL		 1750 send_reset(cm_node, skb);
1751 break;
9d5ab133 1752 case NES_CM_STATE_LAST_ACK:
109d67e4 1753 case NES_CM_STATE_CLOSING:
9d5ab133
FL		 1754 cleanup_retrans_entry(cm_node);
1755 cm_node->state = NES_CM_STATE_CLOSED;
1756 cm_node->cm_id->rem_ref(cm_node->cm_id);
9d5ab133
FL		 1757 rem_ref_cm_node(cm_node->cm_core, cm_node);
1758 drop_packet(skb);
1759 break;
6492cdf3 1760 case NES_CM_STATE_FIN_WAIT1:
9d5ab133
FL		 1761 cleanup_retrans_entry(cm_node);
1762 drop_packet(skb);
1763 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1764 break;
6492cdf3
FL		 1765 case NES_CM_STATE_SYN_SENT:
1766 case NES_CM_STATE_FIN_WAIT2:
1767 case NES_CM_STATE_TSA:
6492cdf3 1768 case NES_CM_STATE_MPAREQ_RCVD:
6492cdf3
FL		 1769 case NES_CM_STATE_UNKNOWN:
1770 default:
109d67e4 1771 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 1772 drop_packet(skb);
1773 break;
3c2d774c 1774 }
109d67e4 1775 return ret;
6492cdf3 1776}
3c2d774c 1777
3c2d774c
GS		 1778
1779
6492cdf3
FL		 1780static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1781 struct sk_buff *skb, int optionsize, int passive)
1782{
1783 u8 *optionsloc = (u8 *)&tcph[1];
3c2d774c 1784 if (optionsize) {
6492cdf3
FL		 1785 if (process_options(cm_node, optionsloc, optionsize,
1786 (u32)tcph->syn)) {
1787 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1788 __func__, cm_node);
1789 if (passive)
abb77256 1790 passive_open_err(cm_node, skb, 1);
6492cdf3 1791 else
abb77256 1792 active_open_err(cm_node, skb, 1);
6492cdf3 1793 return 1;
3c2d774c 1794 }
6492cdf3 1795 }
3c2d774c
GS		 1796
1797 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1798 cm_node->tcp_cntxt.snd_wscale;
1799
6492cdf3 1800 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
3c2d774c 1801 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
6492cdf3
FL		 1802 return 0;
1803}
3c2d774c 1804
6492cdf3
FL		 1805/*
1806 * active_open_err() will send reset() if flag set..
1807 * It will also send ABORT event.
1808 */
3c2d774c 1809
6492cdf3
FL		 1810static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1811 int reset)
1812{
1813 cleanup_retrans_entry(cm_node);
1814 if (reset) {
1815 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1816 "state=%d\n", cm_node, cm_node->state);
1817 add_ref_cm_node(cm_node);
1818 send_reset(cm_node, skb);
1819 } else
1820 dev_kfree_skb_any(skb);
3c2d774c 1821
6492cdf3
FL		 1822 cm_node->state = NES_CM_STATE_CLOSED;
1823 create_event(cm_node, NES_CM_EVENT_ABORTED);
1824}
3c2d774c 1825
6492cdf3
FL		 1826/*
1827 * passive_open_err() will either do a reset() or will free up the skb and
1828 * remove the cm_node.
1829 */
3c2d774c 1830
6492cdf3
FL		 1831static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1832 int reset)
1833{
1834 cleanup_retrans_entry(cm_node);
1835 cm_node->state = NES_CM_STATE_CLOSED;
1836 if (reset) {
1837 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1838 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1839 send_reset(cm_node, skb);
1840 } else {
1841 dev_kfree_skb_any(skb);
1842 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 1843 }
6492cdf3 1844}
3c2d774c 1845
6492cdf3
FL		 1846/*
1847 * free_retrans_entry() routines assumes that the retrans_list_lock has
1848 * been acquired before calling.
1849 */
1850static void free_retrans_entry(struct nes_cm_node *cm_node)
1851{
1852 struct nes_timer_entry *send_entry;
1853 send_entry = cm_node->send_entry;
1854 if (send_entry) {
1855 cm_node->send_entry = NULL;
1856 dev_kfree_skb_any(send_entry->skb);
1857 kfree(send_entry);
1858 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 1859 }
6492cdf3 1860}
3c2d774c 1861
6492cdf3
FL		 1862static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1863{
1864 unsigned long flags;
3c2d774c 1865
6492cdf3
FL		 1866 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1867 free_retrans_entry(cm_node);
1868 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
3c2d774c
GS		 1869}
1870
6492cdf3
FL		 1871/**
1872 * process_packet
1873 * Returns skb if to be freed, else it will return NULL if already used..
1874 */
1875static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1876 struct nes_cm_core *cm_core)
1877{
1878 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1879 struct tcphdr *tcph = tcp_hdr(skb);
9d5ab133 1880 u32 fin_set = 0;
109d67e4 1881 int ret = 0;
6492cdf3
FL		 1882 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1883
1884 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1885 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1886 tcph->ack, tcph->rst, tcph->fin);
1887
1888 if (tcph->rst)
1889 pkt_type = NES_PKT_TYPE_RST;
1890 else if (tcph->syn) {
1891 pkt_type = NES_PKT_TYPE_SYN;
1892 if (tcph->ack)
1893 pkt_type = NES_PKT_TYPE_SYNACK;
9d5ab133 1894 } else if (tcph->ack)
6492cdf3 1895 pkt_type = NES_PKT_TYPE_ACK;
9d5ab133
FL		 1896 if (tcph->fin)
1897 fin_set = 1;
6492cdf3
FL		 1898
1899 switch (pkt_type) {
1900 case NES_PKT_TYPE_SYN:
1901 handle_syn_pkt(cm_node, skb, tcph);
1902 break;
1903 case NES_PKT_TYPE_SYNACK:
1904 handle_synack_pkt(cm_node, skb, tcph);
1905 break;
1906 case NES_PKT_TYPE_ACK:
109d67e4
FL		 1907 ret = handle_ack_pkt(cm_node, skb, tcph);
1908 if (fin_set && !ret)
9d5ab133 1909 handle_fin_pkt(cm_node);
6492cdf3
FL		 1910 break;
1911 case NES_PKT_TYPE_RST:
1912 handle_rst_pkt(cm_node, skb, tcph);
1913 break;
6492cdf3 1914 default:
109d67e4 1915 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
9d5ab133 1916 handle_fin_pkt(cm_node);
109d67e4 1917 drop_packet(skb);
6492cdf3
FL		 1918 break;
1919 }
1920}
3c2d774c
GS		 1921
1922/**
1923 * mini_cm_listen - create a listen node with params
1924 */
1925static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
6492cdf3 1926 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
3c2d774c
GS		 1927{
1928 struct nes_cm_listener *listener;
1929 unsigned long flags;
1930
1931 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1932 cm_info->loc_addr, cm_info->loc_port);
1933
1934 /* cannot have multiple matching listeners */
1935 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1936 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1937 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1938 /* find automatically incs ref count ??? */
1939 atomic_dec(&listener->ref_count);
1940 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1941 return NULL;
1942 }
1943
1944 if (!listener) {
1945 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1946 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1947 if (!listener) {
1948 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1949 return NULL;
1950 }
1951
3c2d774c
GS		 1952 listener->loc_addr = htonl(cm_info->loc_addr);
1953 listener->loc_port = htons(cm_info->loc_port);
1954 listener->reused_node = 0;
1955
1956 atomic_set(&listener->ref_count, 1);
1957 }
1958 /* pasive case */
1959 /* find already inc'ed the ref count */
1960 else {
1961 listener->reused_node = 1;
1962 }
1963
1964 listener->cm_id = cm_info->cm_id;
1965 atomic_set(&listener->pend_accepts_cnt, 0);
1966 listener->cm_core = cm_core;
1967 listener->nesvnic = nesvnic;
1968 atomic_inc(&cm_core->node_cnt);
3c2d774c 1969
3c2d774c
GS		 1970 listener->conn_type = cm_info->conn_type;
1971 listener->backlog = cm_info->backlog;
1972 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1973
1974 if (!listener->reused_node) {
1975 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1976 list_add(&listener->list, &cm_core->listen_list.list);
1977 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1978 atomic_inc(&cm_core->listen_node_cnt);
1979 }
1980
1981 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1982 " listener = %p, backlog = %d, cm_id = %p.\n",
1983 cm_info->loc_addr, cm_info->loc_port,
1984 listener, listener->backlog, listener->cm_id);
1985
1986 return listener;
1987}
1988
1989
1990/**
1991 * mini_cm_connect - make a connection node with params
1992 */
54c86a8c 1993static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
6492cdf3
FL		 1994 struct nes_vnic *nesvnic, u16 private_data_len,
1995 void *private_data, struct nes_cm_info *cm_info)
3c2d774c
GS		 1996{
1997 int ret = 0;
1998 struct nes_cm_node *cm_node;
1999 struct nes_cm_listener *loopbackremotelistener;
2000 struct nes_cm_node *loopbackremotenode;
2001 struct nes_cm_info loopback_cm_info;
6492cdf3
FL		 2002 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
2003 struct ietf_mpa_frame *mpa_frame = NULL;
3c2d774c
GS		 2004
2005 /* create a CM connection node */
2006 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2007 if (!cm_node)
2008 return NULL;
6492cdf3 2009 mpa_frame = &cm_node->mpa_frame;
1cf078c9 2010 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
6492cdf3
FL		 2011 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2012 mpa_frame->rev = IETF_MPA_VERSION;
2013 mpa_frame->priv_data_len = htons(private_data_len);
3c2d774c 2014
7495ab68 2015 /* set our node side to client (active) side */
3c2d774c
GS		 2016 cm_node->tcp_cntxt.client = 1;
2017 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2018
2019 if (cm_info->loc_addr == cm_info->rem_addr) {
6492cdf3
FL		 2020 loopbackremotelistener = find_listener(cm_core,
2021 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2022 NES_CM_LISTENER_ACTIVE_STATE);
3c2d774c
GS		 2023 if (loopbackremotelistener == NULL) {
2024 create_event(cm_node, NES_CM_EVENT_ABORTED);
2025 } else {
3c2d774c
GS		 2026 loopback_cm_info = *cm_info;
2027 loopback_cm_info.loc_port = cm_info->rem_port;
2028 loopback_cm_info.rem_port = cm_info->loc_port;
2029 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
6492cdf3
FL		 2030 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2031 &loopback_cm_info, loopbackremotelistener);
79fc3d74
FL		 2032 if (!loopbackremotenode) {
2033 rem_ref_cm_node(cm_node->cm_core, cm_node);
2034 return NULL;
2035 }
2036 atomic_inc(&cm_loopbacks);
3c2d774c 2037 loopbackremotenode->loopbackpartner = cm_node;
6492cdf3
FL		 2038 loopbackremotenode->tcp_cntxt.rcv_wscale =
2039 NES_CM_DEFAULT_RCV_WND_SCALE;
3c2d774c 2040 cm_node->loopbackpartner = loopbackremotenode;
6492cdf3
FL		 2041 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2042 private_data_len);
2043 loopbackremotenode->mpa_frame_size = private_data_len;
3c2d774c 2044
6492cdf3
FL		 2045 /* we are done handling this state. */
2046 /* set node to a TSA state */
3c2d774c 2047 cm_node->state = NES_CM_STATE_TSA;
6492cdf3
FL		 2048 cm_node->tcp_cntxt.rcv_nxt =
2049 loopbackremotenode->tcp_cntxt.loc_seq_num;
2050 loopbackremotenode->tcp_cntxt.rcv_nxt =
2051 cm_node->tcp_cntxt.loc_seq_num;
2052 cm_node->tcp_cntxt.max_snd_wnd =
2053 loopbackremotenode->tcp_cntxt.rcv_wnd;
2054 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2055 cm_node->tcp_cntxt.rcv_wnd;
2056 cm_node->tcp_cntxt.snd_wnd =
2057 loopbackremotenode->tcp_cntxt.rcv_wnd;
2058 loopbackremotenode->tcp_cntxt.snd_wnd =
2059 cm_node->tcp_cntxt.rcv_wnd;
2060 cm_node->tcp_cntxt.snd_wscale =
2061 loopbackremotenode->tcp_cntxt.rcv_wscale;
2062 loopbackremotenode->tcp_cntxt.snd_wscale =
2063 cm_node->tcp_cntxt.rcv_wscale;
9d5ab133 2064 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
3c2d774c
GS		 2065 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2066 }
2067 return cm_node;
2068 }
2069
2070 /* set our node side to client (active) side */
2071 cm_node->tcp_cntxt.client = 1;
2072 /* init our MPA frame ptr */
6492cdf3
FL		 2073 memcpy(mpa_frame->priv_data, private_data, private_data_len);
2074
3c2d774c
GS		 2075 cm_node->mpa_frame_size = mpa_frame_size;
2076
2077 /* send a syn and goto syn sent state */
2078 cm_node->state = NES_CM_STATE_SYN_SENT;
6492cdf3
FL		 2079 ret = send_syn(cm_node, 0, NULL);
2080
2081 if (ret) {
2082 /* error in sending the syn free up the cm_node struct */
2083 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2084 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2085 cm_node->rem_addr, cm_node->rem_port, cm_node,
2086 cm_node->cm_id);
2087 rem_ref_cm_node(cm_node->cm_core, cm_node);
2088 cm_node = NULL;
2089 }
3c2d774c 2090
6492cdf3
FL		 2091 if (cm_node)
2092 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2093 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2094 cm_node->rem_addr, cm_node->rem_port, cm_node,
2095 cm_node->cm_id);
3c2d774c
GS		 2096
2097 return cm_node;
2098}
2099
2100
2101/**
2102 * mini_cm_accept - accept a connection
2103 * This function is never called
2104 */
6492cdf3
FL		 2105static int mini_cm_accept(struct nes_cm_core *cm_core,
2106 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
3c2d774c
GS		 2107{
2108 return 0;
2109}
2110
2111
2112/**
2113 * mini_cm_reject - reject and teardown a connection
2114 */
1a855fbf 2115static int mini_cm_reject(struct nes_cm_core *cm_core,
6492cdf3 2116 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
3c2d774c
GS		 2117{
2118 int ret = 0;
9d5ab133 2119 int err = 0;
183ecfa3 2120 int passive_state;
9d5ab133
FL		 2121 struct nes_cm_event event;
2122 struct iw_cm_id *cm_id = cm_node->cm_id;
2123 struct nes_cm_node *loopback = cm_node->loopbackpartner;
3c2d774c 2124
6492cdf3
FL		 2125 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2126 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
3c2d774c 2127
6492cdf3
FL		 2128 if (cm_node->tcp_cntxt.client)
2129 return ret;
2130 cleanup_retrans_entry(cm_node);
3c2d774c 2131
9d5ab133
FL		 2132 if (!loopback) {
2133 passive_state = atomic_add_return(1, &cm_node->passive_state);
2134 if (passive_state == NES_SEND_RESET_EVENT) {
2135 cm_node->state = NES_CM_STATE_CLOSED;
2136 rem_ref_cm_node(cm_core, cm_node);
2137 } else {
c5a7d489
FL		 2138 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2139 rem_ref_cm_node(cm_core, cm_node);
2140 } else {
2141 ret = send_mpa_reject(cm_node);
2142 if (ret) {
2143 cm_node->state = NES_CM_STATE_CLOSED;
2144 err = send_reset(cm_node, NULL);
2145 if (err)
2146 WARN_ON(1);
2147 } else
2148 cm_id->add_ref(cm_id);
2149 }
9d5ab133
FL		 2150 }
2151 } else {
2152 cm_node->cm_id = NULL;
c5a7d489
FL		 2153 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2154 rem_ref_cm_node(cm_core, cm_node);
2155 rem_ref_cm_node(cm_core, loopback);
2156 } else {
2157 event.cm_node = loopback;
2158 event.cm_info.rem_addr = loopback->rem_addr;
2159 event.cm_info.loc_addr = loopback->loc_addr;
2160 event.cm_info.rem_port = loopback->rem_port;
2161 event.cm_info.loc_port = loopback->loc_port;
2162 event.cm_info.cm_id = loopback->cm_id;
2163 cm_event_mpa_reject(&event);
2164 rem_ref_cm_node(cm_core, cm_node);
2165 loopback->state = NES_CM_STATE_CLOSING;
9d5ab133 2166
c5a7d489
FL		 2167 cm_id = loopback->cm_id;
2168 rem_ref_cm_node(cm_core, loopback);
2169 cm_id->rem_ref(cm_id);
2170 }
9d5ab133
FL		 2171 }
2172
3c2d774c
GS		 2173 return ret;
2174}
2175
2176
2177/**
2178 * mini_cm_close
2179 */
1a855fbf 2180static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2181{
2182 int ret = 0;
2183
2184 if (!cm_core || !cm_node)
2185 return -EINVAL;
2186
2187 switch (cm_node->state) {
6492cdf3
FL		 2188 case NES_CM_STATE_SYN_RCVD:
2189 case NES_CM_STATE_SYN_SENT:
2190 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2191 case NES_CM_STATE_ESTABLISHED:
2192 case NES_CM_STATE_ACCEPTING:
2193 case NES_CM_STATE_MPAREQ_SENT:
2194 case NES_CM_STATE_MPAREQ_RCVD:
2195 cleanup_retrans_entry(cm_node);
2196 send_reset(cm_node, NULL);
2197 break;
2198 case NES_CM_STATE_CLOSE_WAIT:
2199 cm_node->state = NES_CM_STATE_LAST_ACK;
2200 send_fin(cm_node, NULL);
2201 break;
2202 case NES_CM_STATE_FIN_WAIT1:
2203 case NES_CM_STATE_FIN_WAIT2:
2204 case NES_CM_STATE_LAST_ACK:
2205 case NES_CM_STATE_TIME_WAIT:
2206 case NES_CM_STATE_CLOSING:
2207 ret = -1;
2208 break;
2209 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2210 cleanup_retrans_entry(cm_node);
2211 send_reset(cm_node, NULL);
2212 break;
2213 case NES_CM_STATE_MPAREJ_RCVD:
6492cdf3
FL		 2214 case NES_CM_STATE_UNKNOWN:
2215 case NES_CM_STATE_INITED:
2216 case NES_CM_STATE_CLOSED:
c5a7d489 2217 case NES_CM_STATE_LISTENER_DESTROYED:
6492cdf3
FL		 2218 ret = rem_ref_cm_node(cm_core, cm_node);
2219 break;
2220 case NES_CM_STATE_TSA:
2221 if (cm_node->send_entry)
2222 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2223 "send_entry=%p\n", cm_node->send_entry);
2224 ret = rem_ref_cm_node(cm_core, cm_node);
2225 break;
3c2d774c 2226 }
3c2d774c
GS		 2227 return ret;
2228}
2229
2230
2231/**
2232 * recv_pkt - recv an ETHERNET packet, and process it through CM
2233 * node state machine
2234 */
4a14f6a7 2235static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
6492cdf3 2236 struct nes_vnic *nesvnic, struct sk_buff *skb)
3c2d774c
GS		 2237{
2238 struct nes_cm_node *cm_node = NULL;
2239 struct nes_cm_listener *listener = NULL;
2240 struct iphdr *iph;
2241 struct tcphdr *tcph;
2242 struct nes_cm_info nfo;
4a14f6a7 2243 int skb_handled = 1;
03080e5c 2244 __be32 tmp_daddr, tmp_saddr;
3c2d774c 2245
6492cdf3 2246 if (!skb)
4a14f6a7 2247 return 0;
6492cdf3 2248 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
4a14f6a7 2249 return 0;
3c2d774c
GS		 2250 }
2251
2252 iph = (struct iphdr *)skb->data;
2253 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
3c2d774c
GS		 2254
2255 nfo.loc_addr = ntohl(iph->daddr);
2256 nfo.loc_port = ntohs(tcph->dest);
2257 nfo.rem_addr = ntohl(iph->saddr);
2258 nfo.rem_port = ntohs(tcph->source);
2259
03080e5c
HH		 2260 tmp_daddr = cpu_to_be32(iph->daddr);
2261 tmp_saddr = cpu_to_be32(iph->saddr);
2262
63779436 2263 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
03080e5c 2264 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
3c2d774c 2265
6492cdf3
FL		 2266 do {
2267 cm_node = find_node(cm_core,
3c2d774c
GS		 2268 nfo.rem_port, nfo.rem_addr,
2269 nfo.loc_port, nfo.loc_addr);
2270
3c2d774c 2271 if (!cm_node) {
6492cdf3
FL		 2272 /* Only type of packet accepted are for */
2273 /* the PASSIVE open (syn only) */
2274 if ((!tcph->syn) || (tcph->ack)) {
4a14f6a7 2275 skb_handled = 0;
6492cdf3
FL		 2276 break;
2277 }
2278 listener = find_listener(cm_core, nfo.loc_addr,
2279 nfo.loc_port,
2280 NES_CM_LISTENER_ACTIVE_STATE);
4a14f6a7
FL		 2281 if (!listener) {
2282 nfo.cm_id = NULL;
2283 nfo.conn_type = 0;
2284 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2285 skb_handled = 0;
6492cdf3
FL		 2286 break;
2287 }
4a14f6a7
FL		 2288 nfo.cm_id = listener->cm_id;
2289 nfo.conn_type = listener->conn_type;
6492cdf3
FL		 2290 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2291 listener);
2292 if (!cm_node) {
2293 nes_debug(NES_DBG_CM, "Unable to allocate "
2294 "node\n");
2295 cm_packets_dropped++;
3c2d774c 2296 atomic_dec(&listener->ref_count);
6492cdf3
FL		 2297 dev_kfree_skb_any(skb);
2298 break;
3c2d774c 2299 }
6492cdf3
FL		 2300 if (!tcph->rst && !tcph->fin) {
2301 cm_node->state = NES_CM_STATE_LISTENING;
2302 } else {
2303 cm_packets_dropped++;
2304 rem_ref_cm_node(cm_core, cm_node);
2305 dev_kfree_skb_any(skb);
2306 break;
3c2d774c 2307 }
6492cdf3
FL		 2308 add_ref_cm_node(cm_node);
2309 } else if (cm_node->state == NES_CM_STATE_TSA) {
3c2d774c 2310 rem_ref_cm_node(cm_core, cm_node);
6492cdf3
FL		 2311 atomic_inc(&cm_accel_dropped_pkts);
2312 dev_kfree_skb_any(skb);
2313 break;
3c2d774c 2314 }
4a14f6a7
FL		 2315 skb_reset_network_header(skb);
2316 skb_set_transport_header(skb, sizeof(*tcph));
2317 skb->len = ntohs(iph->tot_len);
6492cdf3
FL		 2318 process_packet(cm_node, skb, cm_core);
2319 rem_ref_cm_node(cm_core, cm_node);
2320 } while (0);
4a14f6a7 2321 return skb_handled;
3c2d774c
GS		 2322}
2323
2324
2325/**
2326 * nes_cm_alloc_core - allocate a top level instance of a cm core
2327 */
1a855fbf 2328static struct nes_cm_core *nes_cm_alloc_core(void)
3c2d774c 2329{
3c2d774c 2330 struct nes_cm_core *cm_core;
3c2d774c
GS		 2331
2332 /* setup the CM core */
2333 /* alloc top level core control structure */
2334 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2335 if (!cm_core)
2336 return NULL;
2337
2338 INIT_LIST_HEAD(&cm_core->connected_nodes);
2339 init_timer(&cm_core->tcp_timer);
2340 cm_core->tcp_timer.function = nes_cm_timer_tick;
2341
2342 cm_core->mtu = NES_CM_DEFAULT_MTU;
2343 cm_core->state = NES_CM_STATE_INITED;
2344 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2345
3c2d774c
GS		 2346 atomic_set(&cm_core->events_posted, 0);
2347
3c2d774c
GS		 2348 cm_core->api = &nes_cm_api;
2349
2350 spin_lock_init(&cm_core->ht_lock);
2351 spin_lock_init(&cm_core->listen_list_lock);
2352
2353 INIT_LIST_HEAD(&cm_core->listen_list.list);
2354
2355 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2356
2357 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2358 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2359 cm_core->post_event = nes_cm_post_event;
2360 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2361 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2362
2363 print_core(cm_core);
2364 return cm_core;
2365}
2366
2367
2368/**
2369 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2370 */
1a855fbf 2371static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
3c2d774c
GS		 2372{
2373 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2374
2375 if (!cm_core)
2376 return -EINVAL;
2377
2378 barrier();
2379
2380 if (timer_pending(&cm_core->tcp_timer)) {
2381 del_timer(&cm_core->tcp_timer);
2382 }
2383
2384 destroy_workqueue(cm_core->event_wq);
2385 destroy_workqueue(cm_core->disconn_wq);
2386 nes_debug(NES_DBG_CM, "\n");
2387 kfree(cm_core);
2388
2389 return 0;
2390}
2391
2392
2393/**
2394 * mini_cm_get
2395 */
1a855fbf 2396static int mini_cm_get(struct nes_cm_core *cm_core)
3c2d774c
GS		 2397{
2398 return cm_core->state;
2399}
2400
2401
2402/**
2403 * mini_cm_set
2404 */
1a855fbf 2405static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
3c2d774c
GS		 2406{
2407 int ret = 0;
2408
2409 switch (type) {
9d5ab133
FL		 2410 case NES_CM_SET_PKT_SIZE:
2411 cm_core->mtu = value;
2412 break;
2413 case NES_CM_SET_FREE_PKT_Q_SIZE:
2414 cm_core->free_tx_pkt_max = value;
2415 break;
2416 default:
2417 /* unknown set option */
2418 ret = -EINVAL;
3c2d774c
GS		 2419 }
2420
2421 return ret;
2422}
2423
2424
2425/**
2426 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2427 * successfully exchanged when this is called
2428 */
2429static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2430{
2431 int ret = 0;
2432
2433 if (!nesqp)
2434 return -EINVAL;
2435
2436 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2437 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2438 NES_QPCONTEXT_MISC_DROS);
2439
2440 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2441 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2442
2443 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2444
2445 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2446
2447 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2448 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2449
2450 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2451 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2452 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2453
2454 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2455 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2456 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2457
2458 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2459 nesqp->nesqp_context->ts_recent = 0;
2460 nesqp->nesqp_context->ts_age = 0;
2461 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2462 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2463 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2464 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2465 cm_node->tcp_cntxt.rcv_wscale);
2466 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2467 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2468 nesqp->nesqp_context->srtt = 0;
2469 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2470 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2471 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2472 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2473 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2474 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2475
2476 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2477 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2478 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2479 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2480 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2481 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2482 le32_to_cpu(nesqp->nesqp_context->misc));
2483 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2484 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2485 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2486
2487 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2488 cm_node->state = NES_CM_STATE_TSA;
2489
2490 return ret;
2491}
2492
2493
2494/**
2495 * nes_cm_disconn
2496 */
2497int nes_cm_disconn(struct nes_qp *nesqp)
2498{
873fcdd4 2499 struct disconn_work *work;
3c2d774c 2500
873fcdd4
DW		 2501 work = kzalloc(sizeof *work, GFP_ATOMIC);
2502 if (!work)
2503 return -ENOMEM; /* Timer will clean up */
3c2d774c 2504
873fcdd4
DW		 2505 nes_add_ref(&nesqp->ibqp);
2506 work->nesqp = nesqp;
2507 INIT_WORK(&work->work, nes_disconnect_worker);
2508 queue_work(g_cm_core->disconn_wq, &work->work);
3c2d774c
GS		 2509 return 0;
2510}
2511
2512
2513/**
2514 * nes_disconnect_worker
2515 */
1a855fbf 2516static void nes_disconnect_worker(struct work_struct *work)
3c2d774c 2517{
873fcdd4
DW		 2518 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2519 struct nes_qp *nesqp = dwork->nesqp;
3c2d774c 2520
873fcdd4 2521 kfree(dwork);
3c2d774c
GS		 2522 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2523 nesqp->last_aeq, nesqp->hwqp.qp_id);
2524 nes_cm_disconn_true(nesqp);
c4c3f279 2525 nes_rem_ref(&nesqp->ibqp);
3c2d774c
GS		 2526}
2527
2528
2529/**
2530 * nes_cm_disconn_true
2531 */
1a855fbf 2532static int nes_cm_disconn_true(struct nes_qp *nesqp)
3c2d774c
GS		 2533{
2534 unsigned long flags;
2535 int ret = 0;
2536 struct iw_cm_id *cm_id;
2537 struct iw_cm_event cm_event;
2538 struct nes_vnic *nesvnic;
2539 u16 last_ae;
2540 u8 original_hw_tcp_state;
2541 u8 original_ibqp_state;
b29a4fc4
DW		 2542 enum iw_cm_event_type disconn_status = IW_CM_EVENT_STATUS_OK;
2543 int issue_disconn = 0;
2544 int issue_close = 0;
2545 int issue_flush = 0;
2546 u32 flush_q = NES_CQP_FLUSH_RQ;
2547 struct ib_event ibevent;
3c2d774c
GS		 2548
2549 if (!nesqp) {
2550 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2551 return -1;
2552 }
2553
2554 spin_lock_irqsave(&nesqp->lock, flags);
2555 cm_id = nesqp->cm_id;
2556 /* make sure we havent already closed this connection */
2557 if (!cm_id) {
2558 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2559 nesqp->hwqp.qp_id);
2560 spin_unlock_irqrestore(&nesqp->lock, flags);
3c2d774c
GS		 2561 return -1;
2562 }
2563
2564 nesvnic = to_nesvnic(nesqp->ibqp.device);
2565 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2566
2567 original_hw_tcp_state = nesqp->hw_tcp_state;
2568 original_ibqp_state = nesqp->ibqp_state;
2569 last_ae = nesqp->last_aeq;
2570
b29a4fc4
DW		 2571 if (nesqp->term_flags) {
2572 issue_disconn = 1;
2573 issue_close = 1;
2574 nesqp->cm_id = NULL;
2575 if (nesqp->flush_issued == 0) {
2576 nesqp->flush_issued = 1;
2577 issue_flush = 1;
2578 }
2579 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2580 ((original_ibqp_state == IB_QPS_RTS) &&
2581 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2582 issue_disconn = 1;
2583 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2584 disconn_status = IW_CM_EVENT_STATUS_RESET;
2585 }
2586
2587 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2588 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2589 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2590 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2591 issue_close = 1;
2592 nesqp->cm_id = NULL;
2593 if (nesqp->flush_issued == 0) {
2594 nesqp->flush_issued = 1;
2595 issue_flush = 1;
2596 }
2597 }
3c2d774c 2598
b29a4fc4
DW		 2599 spin_unlock_irqrestore(&nesqp->lock, flags);
2600
2601 if ((issue_flush) && (nesqp->destroyed == 0)) {
2602 /* Flush the queue(s) */
2603 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2604 flush_q |= NES_CQP_FLUSH_SQ;
2605 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2606
2607 if (nesqp->term_flags) {
2608 ibevent.device = nesqp->ibqp.device;
2609 ibevent.event = nesqp->terminate_eventtype;
2610 ibevent.element.qp = &nesqp->ibqp;
2611 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2612 }
2613 }
3c2d774c 2614
b29a4fc4
DW		 2615 if ((cm_id) && (cm_id->event_handler)) {
2616 if (issue_disconn) {
3c2d774c
GS		 2617 atomic_inc(&cm_disconnects);
2618 cm_event.event = IW_CM_EVENT_DISCONNECT;
b29a4fc4 2619 cm_event.status = disconn_status;
3c2d774c
GS		 2620 cm_event.local_addr = cm_id->local_addr;
2621 cm_event.remote_addr = cm_id->remote_addr;
2622 cm_event.private_data = NULL;
2623 cm_event.private_data_len = 0;
2624
6492cdf3
FL		 2625 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2626 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2627 "cm_id = %p, refcount = %u.\n",
2628 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2629 nesqp->hwqp.sq_tail, cm_id,
2630 atomic_read(&nesqp->refcount));
3c2d774c 2631
3c2d774c
GS		 2632 ret = cm_id->event_handler(cm_id, &cm_event);
2633 if (ret)
6492cdf3
FL		 2634 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2635 "returned, ret=%d\n", ret);
3c2d774c
GS		 2636 }
2637
b29a4fc4 2638 if (issue_close) {
3c2d774c 2639 atomic_inc(&cm_closes);
3c2d774c
GS		 2640 nes_disconnect(nesqp, 1);
2641
2642 cm_id->provider_data = nesqp;
2643 /* Send up the close complete event */
2644 cm_event.event = IW_CM_EVENT_CLOSE;
2645 cm_event.status = IW_CM_EVENT_STATUS_OK;
2646 cm_event.provider_data = cm_id->provider_data;
2647 cm_event.local_addr = cm_id->local_addr;
2648 cm_event.remote_addr = cm_id->remote_addr;
2649 cm_event.private_data = NULL;
2650 cm_event.private_data_len = 0;
2651
2652 ret = cm_id->event_handler(cm_id, &cm_event);
2653 if (ret) {
2654 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2655 }
2656
2657 cm_id->rem_ref(cm_id);
3c2d774c 2658 }
3c2d774c 2659 }
3c2d774c
GS		 2660
2661 return 0;
2662}
2663
2664
2665/**
2666 * nes_disconnect
2667 */
1a855fbf 2668static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3c2d774c
GS		 2669{
2670 int ret = 0;
2671 struct nes_vnic *nesvnic;
2672 struct nes_device *nesdev;
c12e56ef 2673 struct nes_ib_device *nesibdev;
3c2d774c
GS		 2674
2675 nesvnic = to_nesvnic(nesqp->ibqp.device);
2676 if (!nesvnic)
2677 return -EINVAL;
2678
2679 nesdev = nesvnic->nesdev;
c12e56ef 2680 nesibdev = nesvnic->nesibdev;
3c2d774c
GS		 2681
2682 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2683 atomic_read(&nesvnic->netdev->refcnt));
2684
2685 if (nesqp->active_conn) {
2686
2687 /* indicate this connection is NOT active */
2688 nesqp->active_conn = 0;
2689 } else {
2690 /* Need to free the Last Streaming Mode Message */
2691 if (nesqp->ietf_frame) {
c12e56ef
FL		 2692 if (nesqp->lsmm_mr)
2693 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3c2d774c
GS		 2694 pci_free_consistent(nesdev->pcidev,
2695 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2696 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2697 }
2698 }
2699
2700 /* close the CM node down if it is still active */
2701 if (nesqp->cm_node) {
2702 nes_debug(NES_DBG_CM, "Call close API\n");
2703
2704 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3c2d774c
GS		 2705 }
2706
2707 return ret;
2708}
2709
2710
2711/**
2712 * nes_accept
2713 */
2714int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2715{
2716 u64 u64temp;
2717 struct ib_qp *ibqp;
2718 struct nes_qp *nesqp;
2719 struct nes_vnic *nesvnic;
2720 struct nes_device *nesdev;
2721 struct nes_cm_node *cm_node;
2722 struct nes_adapter *adapter;
2723 struct ib_qp_attr attr;
2724 struct iw_cm_event cm_event;
2725 struct nes_hw_qp_wqe *wqe;
2726 struct nes_v4_quad nes_quad;
30da7cff 2727 u32 crc_value;
3c2d774c 2728 int ret;
183ecfa3 2729 int passive_state;
c12e56ef
FL		 2730 struct nes_ib_device *nesibdev;
2731 struct ib_mr *ibmr = NULL;
2732 struct ib_phys_buf ibphysbuf;
2733 struct nes_pd *nespd;
7a5efb62 2734 u64 tagged_offset;
c12e56ef 2735
3c2d774c
GS		 2736 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2737 if (!ibqp)
2738 return -EINVAL;
2739
2740 /* get all our handles */
2741 nesqp = to_nesqp(ibqp);
2742 nesvnic = to_nesvnic(nesqp->ibqp.device);
2743 nesdev = nesvnic->nesdev;
2744 adapter = nesdev->nesadapter;
2745
3c2d774c 2746 cm_node = (struct nes_cm_node *)cm_id->provider_data;
6492cdf3
FL		 2747 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2748 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2749 nesvnic->netdev->name);
3c2d774c 2750
c5a7d489
FL		 2751 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
2752 if (cm_node->loopbackpartner)
2753 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
2754 rem_ref_cm_node(cm_node->cm_core, cm_node);
2755 return -EINVAL;
2756 }
2757
3c2d774c
GS		 2758 /* associate the node with the QP */
2759 nesqp->cm_node = (void *)cm_node;
6492cdf3 2760 cm_node->nesqp = nesqp;
3c2d774c 2761
6492cdf3
FL		 2762 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2763 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3c2d774c
GS		 2764 atomic_inc(&cm_accepts);
2765
2766 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2767 atomic_read(&nesvnic->netdev->refcnt));
2768
6492cdf3
FL		 2769 /* allocate the ietf frame and space for private data */
2770 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2771 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2772 &nesqp->ietf_frame_pbase);
3c2d774c 2773
6492cdf3
FL		 2774 if (!nesqp->ietf_frame) {
2775 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2776 "data\n");
2777 return -ENOMEM;
2778 }
3c2d774c 2779
3c2d774c 2780
6492cdf3
FL		 2781 /* setup the MPA frame */
2782 nesqp->private_data_len = conn_param->private_data_len;
2783 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
3c2d774c 2784
6492cdf3
FL		 2785 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2786 conn_param->private_data_len);
3c2d774c 2787
6492cdf3
FL		 2788 nesqp->ietf_frame->priv_data_len =
2789 cpu_to_be16(conn_param->private_data_len);
2790 nesqp->ietf_frame->rev = mpa_version;
2791 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
3c2d774c 2792
6492cdf3
FL		 2793 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2794 wqe = &nesqp->hwqp.sq_vbase[0];
2795
2796 if (cm_id->remote_addr.sin_addr.s_addr !=
2797 cm_id->local_addr.sin_addr.s_addr) {
2798 u64temp = (unsigned long)nesqp;
c12e56ef
FL		 2799 nesibdev = nesvnic->nesibdev;
2800 nespd = nesqp->nespd;
2801 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2802 ibphysbuf.size = conn_param->private_data_len +
2803 sizeof(struct ietf_mpa_frame);
7a5efb62 2804 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
c12e56ef
FL		 2805 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2806 &ibphysbuf, 1,
2807 IB_ACCESS_LOCAL_WRITE,
7a5efb62 2808 &tagged_offset);
c12e56ef
FL		 2809 if (!ibmr) {
2810 nes_debug(NES_DBG_CM, "Unable to register memory region"
2811 "for lSMM for cm_node = %p \n",
2812 cm_node);
9256b251
FL		 2813 pci_free_consistent(nesdev->pcidev,
2814 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2815 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
c12e56ef
FL		 2816 return -ENOMEM;
2817 }
2818
2819 ibmr->pd = &nespd->ibpd;
2820 ibmr->device = nespd->ibpd.device;
2821 nesqp->lsmm_mr = ibmr;
2822
6492cdf3
FL		 2823 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2824 set_wqe_64bit_value(wqe->wqe_words,
2825 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2826 u64temp);
2827 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2828 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2829 NES_IWARP_SQ_WQE_WRPDU);
2830 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2831 cpu_to_le32(conn_param->private_data_len +
2832 sizeof(struct ietf_mpa_frame));
c12e56ef
FL		 2833 set_wqe_64bit_value(wqe->wqe_words,
2834 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
7a5efb62 2835 (u64)(unsigned long)nesqp->ietf_frame);
6492cdf3
FL		 2836 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2837 cpu_to_le32(conn_param->private_data_len +
2838 sizeof(struct ietf_mpa_frame));
c12e56ef 2839 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
d2fa9b26
FL		 2840 if (nesqp->sq_kmapped) {
2841 nesqp->sq_kmapped = 0;
2842 kunmap(nesqp->page);
2843 }
6492cdf3
FL		 2844
2845 nesqp->nesqp_context->ird_ord_sizes |=
2846 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2847 NES_QPCONTEXT_ORDIRD_WRPDU);
2848 } else {
2849 nesqp->nesqp_context->ird_ord_sizes |=
9d5ab133 2850 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
6492cdf3
FL		 2851 }
2852 nesqp->skip_lsmm = 1;
3c2d774c
GS		 2853
2854
2855 /* Cache the cm_id in the qp */
2856 nesqp->cm_id = cm_id;
2857 cm_node->cm_id = cm_id;
2858
2859 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2860 cm_id->provider_data = nesqp;
2861 nesqp->active_conn = 0;
2862
6492cdf3
FL		 2863 if (cm_node->state == NES_CM_STATE_TSA)
2864 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2865 cm_node);
2866
3c2d774c
GS		 2867 nes_cm_init_tsa_conn(nesqp, cm_node);
2868
6492cdf3
FL		 2869 nesqp->nesqp_context->tcpPorts[0] =
2870 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2871 nesqp->nesqp_context->tcpPorts[1] =
2872 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2873
2874 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2875 nesqp->nesqp_context->ip0 =
2876 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2877 else
2878 nesqp->nesqp_context->ip0 =
2879 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3c2d774c
GS		 2880
2881 nesqp->nesqp_context->misc2 |= cpu_to_le32(
6492cdf3
FL		 2882 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2883 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 2884
6492cdf3
FL		 2885 nesqp->nesqp_context->arp_index_vlan |=
2886 cpu_to_le32(nes_arp_table(nesdev,
2887 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3c2d774c
GS		 2888 NES_ARP_RESOLVE) << 16);
2889
2890 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
6492cdf3 2891 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3c2d774c
GS		 2892
2893 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2894
2895 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
6492cdf3
FL		 2896 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2897 nesqp->nesqp_context->ird_ord_sizes |=
2898 cpu_to_le32((u32)conn_param->ord);
3c2d774c
GS		 2899
2900 memset(&nes_quad, 0, sizeof(nes_quad));
6492cdf3
FL		 2901 nes_quad.DstIpAdrIndex =
2902 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2903 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2904 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2905 else
2906 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2907 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2908 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3c2d774c
GS		 2909
2910 /* Produce hash key */
30da7cff
FL		 2911 crc_value = get_crc_value(&nes_quad);
2912 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c 2913 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
6492cdf3 2914 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3c2d774c
GS		 2915
2916 nesqp->hte_index &= adapter->hte_index_mask;
2917 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2918
2919 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2920
6492cdf3
FL		 2921 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2922 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2923 "private data length=%zu.\n", nesqp->hwqp.qp_id,
3c2d774c
GS		 2924 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2925 ntohs(cm_id->remote_addr.sin_port),
2926 ntohl(cm_id->local_addr.sin_addr.s_addr),
2927 ntohs(cm_id->local_addr.sin_port),
2928 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2929 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
6492cdf3
FL		 2930 conn_param->private_data_len +
2931 sizeof(struct ietf_mpa_frame));
3c2d774c 2932
3c2d774c 2933
73ac36ea 2934 /* notify OF layer that accept event was successful */
3c2d774c 2935 cm_id->add_ref(cm_id);
9256b251 2936 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 2937
2938 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2939 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2940 cm_event.provider_data = (void *)nesqp;
2941 cm_event.local_addr = cm_id->local_addr;
2942 cm_event.remote_addr = cm_id->remote_addr;
2943 cm_event.private_data = NULL;
2944 cm_event.private_data_len = 0;
2945 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 2946 attr.qp_state = IB_QPS_RTS;
2947 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 2948 if (cm_node->loopbackpartner) {
6492cdf3
FL		 2949 cm_node->loopbackpartner->mpa_frame_size =
2950 nesqp->private_data_len;
3c2d774c 2951 /* copy entire MPA frame to our cm_node's frame */
6492cdf3
FL		 2952 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2953 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
3c2d774c
GS		 2954 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2955 }
2956 if (ret)
6492cdf3
FL		 2957 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2958 "ret=%d\n", __func__, __LINE__, ret);
3c2d774c 2959
183ecfa3
FL		 2960 passive_state = atomic_add_return(1, &cm_node->passive_state);
2961 if (passive_state == NES_SEND_RESET_EVENT)
2962 create_event(cm_node, NES_CM_EVENT_RESET);
3c2d774c
GS		 2963 return 0;
2964}
2965
2966
2967/**
2968 * nes_reject
2969 */
2970int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2971{
2972 struct nes_cm_node *cm_node;
9d5ab133
FL		 2973 struct nes_cm_node *loopback;
2974
3c2d774c
GS		 2975 struct nes_cm_core *cm_core;
2976
2977 atomic_inc(&cm_rejects);
2978 cm_node = (struct nes_cm_node *) cm_id->provider_data;
9d5ab133 2979 loopback = cm_node->loopbackpartner;
3c2d774c 2980 cm_core = cm_node->cm_core;
9d5ab133 2981 cm_node->cm_id = cm_id;
3c2d774c
GS		 2982 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2983
9d5ab133
FL		 2984 if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
2985 return -EINVAL;
2986
1cf078c9 2987 memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
9d5ab133
FL		 2988 if (loopback) {
2989 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
2990 loopback->mpa_frame.priv_data_len = pdata_len;
2991 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
2992 pdata_len;
2993 } else {
2994 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2995 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2996 }
3c2d774c 2997
3c2d774c
GS		 2998 cm_node->mpa_frame.rev = mpa_version;
2999 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
3000
9d5ab133 3001 return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
3c2d774c
GS		 3002}
3003
3004
3005/**
3006 * nes_connect
3007 * setup and launch cm connect node
3008 */
3009int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3010{
3011 struct ib_qp *ibqp;
3012 struct nes_qp *nesqp;
3013 struct nes_vnic *nesvnic;
3014 struct nes_device *nesdev;
3015 struct nes_cm_node *cm_node;
3016 struct nes_cm_info cm_info;
53094c38 3017 int apbvt_set = 0;
3c2d774c
GS		 3018
3019 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3020 if (!ibqp)
3021 return -EINVAL;
3022 nesqp = to_nesqp(ibqp);
3023 if (!nesqp)
3024 return -EINVAL;
3025 nesvnic = to_nesvnic(nesqp->ibqp.device);
3026 if (!nesvnic)
3027 return -EINVAL;
3028 nesdev = nesvnic->nesdev;
3029 if (!nesdev)
3030 return -EINVAL;
3031
c5a7d489
FL		 3032 if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3033 return -EINVAL;
3034
6492cdf3
FL		 3035 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3036 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3037 ntohl(nesvnic->local_ipaddr),
3038 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3039 ntohs(cm_id->remote_addr.sin_port),
3040 ntohl(cm_id->local_addr.sin_addr.s_addr),
3041 ntohs(cm_id->local_addr.sin_port));
3c2d774c 3042
6492cdf3 3043 atomic_inc(&cm_connects);
3c2d774c
GS		 3044 nesqp->active_conn = 1;
3045
3c2d774c
GS		 3046 /* cache the cm_id in the qp */
3047 nesqp->cm_id = cm_id;
3048
3049 cm_id->provider_data = nesqp;
3050
3c2d774c
GS		 3051 nesqp->private_data_len = conn_param->private_data_len;
3052 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3053 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
6492cdf3
FL		 3054 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3055 conn_param->private_data_len);
3c2d774c 3056
6492cdf3 3057 if (cm_id->local_addr.sin_addr.s_addr !=
53094c38 3058 cm_id->remote_addr.sin_addr.s_addr) {
3c2d774c 3059 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
6492cdf3 3060 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
53094c38
FL		 3061 apbvt_set = 1;
3062 }
3c2d774c
GS		 3063
3064 /* set up the connection params for the node */
6492cdf3
FL		 3065 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3066 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3067 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3068 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3c2d774c
GS		 3069 cm_info.cm_id = cm_id;
3070 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3071
3072 cm_id->add_ref(cm_id);
3c2d774c
GS		 3073
3074 /* create a connect CM node connection */
6492cdf3
FL		 3075 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3076 conn_param->private_data_len, (void *)conn_param->private_data,
3077 &cm_info);
3c2d774c 3078 if (!cm_node) {
53094c38 3079 if (apbvt_set)
3c2d774c 3080 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
6492cdf3
FL		 3081 PCI_FUNC(nesdev->pcidev->devfn),
3082 NES_MANAGE_APBVT_DEL);
3083
3c2d774c
GS		 3084 cm_id->rem_ref(cm_id);
3085 return -ENOMEM;
3086 }
3087
53094c38 3088 cm_node->apbvt_set = apbvt_set;
3c2d774c 3089 nesqp->cm_node = cm_node;
6492cdf3 3090 cm_node->nesqp = nesqp;
d7ffd507 3091 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 3092
3093 return 0;
3094}
3095
3096
3097/**
3098 * nes_create_listen
3099 */
3100int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3101{
3102 struct nes_vnic *nesvnic;
3103 struct nes_cm_listener *cm_node;
3104 struct nes_cm_info cm_info;
3105 struct nes_adapter *adapter;
3106 int err;
3107
3108
3109 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3110 cm_id, ntohs(cm_id->local_addr.sin_port));
3111
3112 nesvnic = to_nesvnic(cm_id->device);
3113 if (!nesvnic)
3114 return -EINVAL;
3115 adapter = nesvnic->nesdev->nesadapter;
3116 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3117 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3118
3119 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3120 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3121
3122 /* setup listen params in our api call struct */
3123 cm_info.loc_addr = nesvnic->local_ipaddr;
3124 cm_info.loc_port = cm_id->local_addr.sin_port;
3125 cm_info.backlog = backlog;
3126 cm_info.cm_id = cm_id;
3127
3128 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3129
3130
3131 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3132 if (!cm_node) {
6492cdf3 3133 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
33718363 3134 __func__, __LINE__);
3c2d774c
GS		 3135 return -ENOMEM;
3136 }
3137
3138 cm_id->provider_data = cm_node;
3139
3140 if (!cm_node->reused_node) {
6492cdf3
FL		 3141 err = nes_manage_apbvt(nesvnic,
3142 ntohs(cm_id->local_addr.sin_port),
3143 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3144 NES_MANAGE_APBVT_ADD);
3c2d774c 3145 if (err) {
6492cdf3
FL		 3146 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3147 err);
3c2d774c
GS		 3148 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3149 return err;
3150 }
3151 cm_listens_created++;
3152 }
3153
3154 cm_id->add_ref(cm_id);
3155 cm_id->provider_data = (void *)cm_node;
3156
3157
3158 return 0;
3159}
3160
3161
3162/**
3163 * nes_destroy_listen
3164 */
3165int nes_destroy_listen(struct iw_cm_id *cm_id)
3166{
3167 if (cm_id->provider_data)
3168 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3169 else
3170 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3171
3172 cm_id->rem_ref(cm_id);
3173
3174 return 0;
3175}
3176
3177
3178/**
3179 * nes_cm_recv
3180 */
3181int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3182{
4a14f6a7 3183 int rc = 0;
3c2d774c
GS		 3184 cm_packets_received++;
3185 if ((g_cm_core) && (g_cm_core->api)) {
4a14f6a7 3186 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3c2d774c
GS		 3187 } else {
3188 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3189 " cm is not setup properly.\n");
3190 }
3191
4a14f6a7 3192 return rc;
3c2d774c
GS		 3193}
3194
3195
3196/**
3197 * nes_cm_start
3198 * Start and init a cm core module
3199 */
3200int nes_cm_start(void)
3201{
3202 nes_debug(NES_DBG_CM, "\n");
3203 /* create the primary CM core, pass this handle to subsequent core inits */
3204 g_cm_core = nes_cm_alloc_core();
3205 if (g_cm_core) {
3206 return 0;
3207 } else {
3208 return -ENOMEM;
3209 }
3210}
3211
3212
3213/**
3214 * nes_cm_stop
3215 * stop and dealloc all cm core instances
3216 */
3217int nes_cm_stop(void)
3218{
3219 g_cm_core->api->destroy_cm_core(g_cm_core);
3220 return 0;
3221}
3222
3223
3224/**
3225 * cm_event_connected
3226 * handle a connected event, setup QPs and HW
3227 */
1a855fbf 3228static void cm_event_connected(struct nes_cm_event *event)
3c2d774c
GS		 3229{
3230 u64 u64temp;
3231 struct nes_qp *nesqp;
3232 struct nes_vnic *nesvnic;
3233 struct nes_device *nesdev;
3234 struct nes_cm_node *cm_node;
3235 struct nes_adapter *nesadapter;
3236 struct ib_qp_attr attr;
3237 struct iw_cm_id *cm_id;
3238 struct iw_cm_event cm_event;
3239 struct nes_hw_qp_wqe *wqe;
3240 struct nes_v4_quad nes_quad;
30da7cff 3241 u32 crc_value;
3c2d774c
GS		 3242 int ret;
3243
3244 /* get all our handles */
3245 cm_node = event->cm_node;
3246 cm_id = cm_node->cm_id;
3247 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3248 nesqp = (struct nes_qp *)cm_id->provider_data;
3249 nesvnic = to_nesvnic(nesqp->ibqp.device);
3250 nesdev = nesvnic->nesdev;
3251 nesadapter = nesdev->nesadapter;
3252
3253 if (nesqp->destroyed) {
3254 return;
3255 }
3256 atomic_inc(&cm_connecteds);
3257 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3258 " local port 0x%04X. jiffies = %lu.\n",
3259 nesqp->hwqp.qp_id,
3260 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3261 ntohs(cm_id->remote_addr.sin_port),
3262 ntohs(cm_id->local_addr.sin_port),
3263 jiffies);
3264
3265 nes_cm_init_tsa_conn(nesqp, cm_node);
3266
3267 /* set the QP tsa context */
6492cdf3
FL		 3268 nesqp->nesqp_context->tcpPorts[0] =
3269 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3270 nesqp->nesqp_context->tcpPorts[1] =
3271 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3272 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3273 nesqp->nesqp_context->ip0 =
3274 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3275 else
3276 nesqp->nesqp_context->ip0 =
3277 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3c2d774c
GS		 3278
3279 nesqp->nesqp_context->misc2 |= cpu_to_le32(
6492cdf3
FL		 3280 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3281 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 3282 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
6492cdf3
FL		 3283 nes_arp_table(nesdev,
3284 le32_to_cpu(nesqp->nesqp_context->ip0),
3c2d774c
GS		 3285 NULL, NES_ARP_RESOLVE) << 16);
3286 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3287 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3288 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3289 nesqp->nesqp_context->ird_ord_sizes |=
6492cdf3
FL		 3290 cpu_to_le32((u32)1 <<
3291 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3c2d774c
GS		 3292
3293 /* Adjust tail for not having a LSMM */
3294 nesqp->hwqp.sq_tail = 1;
3295
3296#if defined(NES_SEND_FIRST_WRITE)
6492cdf3
FL		 3297 if (cm_node->send_write0) {
3298 nes_debug(NES_DBG_CM, "Sending first write.\n");
3299 wqe = &nesqp->hwqp.sq_vbase[0];
3300 u64temp = (unsigned long)nesqp;
3301 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3302 set_wqe_64bit_value(wqe->wqe_words,
3303 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3304 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3305 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3306 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3307 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3308 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3309 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3310 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3311
d2fa9b26
FL		 3312 if (nesqp->sq_kmapped) {
3313 nesqp->sq_kmapped = 0;
3314 kunmap(nesqp->page);
3315 }
3316
6492cdf3
FL		 3317 /* use the reserved spot on the WQ for the extra first WQE */
3318 nesqp->nesqp_context->ird_ord_sizes &=
3319 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3320 NES_QPCONTEXT_ORDIRD_WRPDU |
3321 NES_QPCONTEXT_ORDIRD_ALSMM));
3322 nesqp->skip_lsmm = 1;
3323 nesqp->hwqp.sq_tail = 0;
3324 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3325 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3326 }
3c2d774c
GS		 3327#endif
3328
3329 memset(&nes_quad, 0, sizeof(nes_quad));
3330
6492cdf3
FL		 3331 nes_quad.DstIpAdrIndex =
3332 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3333 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3334 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3335 else
3336 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3c2d774c
GS		 3337 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3338 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3339
3340 /* Produce hash key */
30da7cff
FL		 3341 crc_value = get_crc_value(&nes_quad);
3342 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c
GS		 3343 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3344 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3345
3346 nesqp->hte_index &= nesadapter->hte_index_mask;
3347 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3348
3349 nesqp->ietf_frame = &cm_node->mpa_frame;
3350 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3351 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3352
3c2d774c
GS		 3353 /* notify OF layer we successfully created the requested connection */
3354 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3355 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3356 cm_event.provider_data = cm_id->provider_data;
3357 cm_event.local_addr.sin_family = AF_INET;
3358 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3359 cm_event.remote_addr = cm_id->remote_addr;
3360
6492cdf3
FL		 3361 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3362 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3c2d774c
GS		 3363
3364 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3365 ret = cm_id->event_handler(cm_id, &cm_event);
3366 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3367
3368 if (ret)
6492cdf3
FL		 3369 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3370 "ret=%d\n", __func__, __LINE__, ret);
3371 attr.qp_state = IB_QPS_RTS;
3372 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 3373
6492cdf3
FL		 3374 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3375 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3c2d774c
GS		 3376
3377 return;
3378}
3379
3380
3381/**
3382 * cm_event_connect_error
3383 */
1a855fbf 3384static void cm_event_connect_error(struct nes_cm_event *event)
3c2d774c
GS		 3385{
3386 struct nes_qp *nesqp;
3387 struct iw_cm_id *cm_id;
3388 struct iw_cm_event cm_event;
3389 /* struct nes_cm_info cm_info; */
3390 int ret;
3391
3392 if (!event->cm_node)
3393 return;
3394
3395 cm_id = event->cm_node->cm_id;
3396 if (!cm_id) {
3397 return;
3398 }
3399
3400 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3401 nesqp = cm_id->provider_data;
3402
3403 if (!nesqp) {
3404 return;
3405 }
3406
3407 /* notify OF layer about this connection error event */
3408 /* cm_id->rem_ref(cm_id); */
3409 nesqp->cm_id = NULL;
3410 cm_id->provider_data = NULL;
3411 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
c5a7d489 3412 cm_event.status = -ECONNRESET;
3c2d774c
GS		 3413 cm_event.provider_data = cm_id->provider_data;
3414 cm_event.local_addr = cm_id->local_addr;
3415 cm_event.remote_addr = cm_id->remote_addr;
3416 cm_event.private_data = NULL;
3417 cm_event.private_data_len = 0;
3418
6492cdf3
FL		 3419 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3420 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3421 cm_event.remote_addr.sin_addr.s_addr);
3c2d774c
GS		 3422
3423 ret = cm_id->event_handler(cm_id, &cm_event);
3424 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3425 if (ret)
6492cdf3
FL		 3426 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3427 "ret=%d\n", __func__, __LINE__, ret);
6492cdf3 3428 cm_id->rem_ref(cm_id);
3c2d774c 3429
6492cdf3 3430 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3c2d774c
GS		 3431 return;
3432}
3433
3434
3435/**
3436 * cm_event_reset
3437 */
1a855fbf 3438static void cm_event_reset(struct nes_cm_event *event)
3c2d774c
GS		 3439{
3440 struct nes_qp *nesqp;
3441 struct iw_cm_id *cm_id;
3442 struct iw_cm_event cm_event;
3443 /* struct nes_cm_info cm_info; */
3444 int ret;
3445
3446 if (!event->cm_node)
3447 return;
3448
3449 if (!event->cm_node->cm_id)
3450 return;
3451
3452 cm_id = event->cm_node->cm_id;
3453
3454 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3455 nesqp = cm_id->provider_data;
f9f3f1e0
FL		 3456 if (!nesqp)
3457 return;
3c2d774c
GS		 3458
3459 nesqp->cm_id = NULL;
3460 /* cm_id->provider_data = NULL; */
3461 cm_event.event = IW_CM_EVENT_DISCONNECT;
3462 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3463 cm_event.provider_data = cm_id->provider_data;
3464 cm_event.local_addr = cm_id->local_addr;
3465 cm_event.remote_addr = cm_id->remote_addr;
3466 cm_event.private_data = NULL;
3467 cm_event.private_data_len = 0;
3468
183ecfa3 3469 cm_id->add_ref(cm_id);
f9f3f1e0 3470 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 3471 atomic_inc(&cm_closes);
3472 cm_event.event = IW_CM_EVENT_CLOSE;
3473 cm_event.status = IW_CM_EVENT_STATUS_OK;
3474 cm_event.provider_data = cm_id->provider_data;
3475 cm_event.local_addr = cm_id->local_addr;
3476 cm_event.remote_addr = cm_id->remote_addr;
3477 cm_event.private_data = NULL;
3478 cm_event.private_data_len = 0;
3479 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3480 ret = cm_id->event_handler(cm_id, &cm_event);
3481
3c2d774c
GS		 3482 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3483
3484
3485 /* notify OF layer about this connection error event */
3486 cm_id->rem_ref(cm_id);
3487
3488 return;
3489}
3490
3491
3492/**
3493 * cm_event_mpa_req
3494 */
1a855fbf 3495static void cm_event_mpa_req(struct nes_cm_event *event)
3c2d774c
GS		 3496{
3497 struct iw_cm_id *cm_id;
3498 struct iw_cm_event cm_event;
3499 int ret;
3500 struct nes_cm_node *cm_node;
3501
3502 cm_node = event->cm_node;
3503 if (!cm_node)
3504 return;
3505 cm_id = cm_node->cm_id;
3506
3507 atomic_inc(&cm_connect_reqs);
3508 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3509 cm_node, cm_id, jiffies);
3510
3511 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3512 cm_event.status = IW_CM_EVENT_STATUS_OK;
3513 cm_event.provider_data = (void *)cm_node;
3514
3515 cm_event.local_addr.sin_family = AF_INET;
3516 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3517 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3518
9d5ab133
FL		 3519 cm_event.remote_addr.sin_family = AF_INET;
3520 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3521 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3522 cm_event.private_data = cm_node->mpa_frame_buf;
3523 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3524
3525 ret = cm_id->event_handler(cm_id, &cm_event);
3526 if (ret)
3527 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3528 __func__, __LINE__, ret);
3529 return;
3530}
3531
3532
3533static void cm_event_mpa_reject(struct nes_cm_event *event)
3534{
3535 struct iw_cm_id *cm_id;
3536 struct iw_cm_event cm_event;
3537 struct nes_cm_node *cm_node;
3538 int ret;
3539
3540 cm_node = event->cm_node;
3541 if (!cm_node)
3542 return;
3543 cm_id = cm_node->cm_id;
3544
3545 atomic_inc(&cm_connect_reqs);
3546 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3547 cm_node, cm_id, jiffies);
3548
3549 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3550 cm_event.status = -ECONNREFUSED;
3551 cm_event.provider_data = cm_id->provider_data;
3552
3553 cm_event.local_addr.sin_family = AF_INET;
3554 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3555 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3556
3c2d774c
GS		 3557 cm_event.remote_addr.sin_family = AF_INET;
3558 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3559 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3560
9d5ab133
FL		 3561 cm_event.private_data = cm_node->mpa_frame_buf;
3562 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3563
3564 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3565 "remove_addr=%08x\n",
3566 cm_event.local_addr.sin_addr.s_addr,
3567 cm_event.remote_addr.sin_addr.s_addr);
3c2d774c
GS		 3568
3569 ret = cm_id->event_handler(cm_id, &cm_event);
3570 if (ret)
9d5ab133 3571 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
33718363 3572 __func__, __LINE__, ret);
3c2d774c
GS		 3573
3574 return;
3575}
3576
3577
3578static void nes_cm_event_handler(struct work_struct *);
3579
3580/**
3581 * nes_cm_post_event
3582 * post an event to the cm event handler
3583 */
1a855fbf 3584static int nes_cm_post_event(struct nes_cm_event *event)
3c2d774c
GS		 3585{
3586 atomic_inc(&event->cm_node->cm_core->events_posted);
3587 add_ref_cm_node(event->cm_node);
3588 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3589 INIT_WORK(&event->event_work, nes_cm_event_handler);
6492cdf3
FL		 3590 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3591 event->cm_node, event);
3c2d774c
GS		 3592
3593 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3594
3595 nes_debug(NES_DBG_CM, "Exit\n");
3596 return 0;
3597}
3598
3599
3600/**
3601 * nes_cm_event_handler
3602 * worker function to handle cm events
3603 * will free instance of nes_cm_event
3604 */
3605static void nes_cm_event_handler(struct work_struct *work)
3606{
6492cdf3
FL		 3607 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3608 event_work);
3c2d774c
GS		 3609 struct nes_cm_core *cm_core;
3610
6492cdf3 3611 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3c2d774c 3612 return;
6492cdf3 3613
3c2d774c
GS		 3614 cm_core = event->cm_node->cm_core;
3615 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
6492cdf3 3616 event, event->type, atomic_read(&cm_core->events_posted));
3c2d774c
GS		 3617
3618 switch (event->type) {
6492cdf3
FL		 3619 case NES_CM_EVENT_MPA_REQ:
3620 cm_event_mpa_req(event);
3621 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3622 event->cm_node);
3623 break;
3624 case NES_CM_EVENT_RESET:
3625 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3626 event->cm_node);
3627 cm_event_reset(event);
3628 break;
3629 case NES_CM_EVENT_CONNECTED:
3630 if ((!event->cm_node->cm_id) ||
3631 (event->cm_node->state != NES_CM_STATE_TSA))
3c2d774c 3632 break;
6492cdf3
FL		 3633 cm_event_connected(event);
3634 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3635 break;
9d5ab133
FL		 3636 case NES_CM_EVENT_MPA_REJECT:
3637 if ((!event->cm_node->cm_id) ||
3638 (event->cm_node->state == NES_CM_STATE_TSA))
3639 break;
3640 cm_event_mpa_reject(event);
3641 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3642 break;
3643
6492cdf3
FL		 3644 case NES_CM_EVENT_ABORTED:
3645 if ((!event->cm_node->cm_id) ||
3646 (event->cm_node->state == NES_CM_STATE_TSA))
3c2d774c 3647 break;
6492cdf3
FL		 3648 cm_event_connect_error(event);
3649 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3650 break;
3651 case NES_CM_EVENT_DROPPED_PKT:
3652 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3653 break;
3654 default:
3655 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3656 break;
3c2d774c
GS		 3657 }
3658
3659 atomic_dec(&cm_core->events_posted);
3660 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3661 rem_ref_cm_node(cm_core, event->cm_node);
3662 kfree(event);
3663
3664 return;
3665}
Linux kernel - Deliverables
This page took 0.373776 seconds and 5 git commands to generate.