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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
[linux-2.6-block.git] / drivers / infiniband / hw / nes / nes_cm.c
CommitLineData
3c2d774c
GS		 1/*
2 * Copyright (c) 2006 - 2008 NetEffect, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34
35#define TCPOPT_TIMESTAMP 8
36
37#include <asm/atomic.h>
38#include <linux/skbuff.h>
39#include <linux/ip.h>
40#include <linux/tcp.h>
41#include <linux/init.h>
42#include <linux/if_arp.h>
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>
7191a0a1 55#include <net/arp.h>
3c2d774c
GS		 56#include <net/neighbour.h>
57#include <net/route.h>
58#include <net/ip_fib.h>
59
60#include "nes.h"
61
62u32 cm_packets_sent;
63u32 cm_packets_bounced;
64u32 cm_packets_dropped;
65u32 cm_packets_retrans;
66u32 cm_packets_created;
67u32 cm_packets_received;
68u32 cm_listens_created;
69u32 cm_listens_destroyed;
70u32 cm_backlog_drops;
71atomic_t cm_loopbacks;
72atomic_t cm_nodes_created;
73atomic_t cm_nodes_destroyed;
74atomic_t cm_accel_dropped_pkts;
75atomic_t cm_resets_recvd;
76
6492cdf3
FL		 77static inline int mini_cm_accelerated(struct nes_cm_core *,
78 struct nes_cm_node *);
3c2d774c 79static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
6492cdf3 80 struct nes_vnic *, struct nes_cm_info *);
3c2d774c 81static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
1a855fbf 82static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
6492cdf3
FL		 83 struct nes_vnic *, u16, void *, struct nes_cm_info *);
84static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
1a855fbf 85static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
6492cdf3 86 struct nes_cm_node *);
1a855fbf 87static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
6492cdf3 88 struct nes_cm_node *);
4a14f6a7 89static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
6492cdf3 90 struct sk_buff *);
1a855fbf
RD		 91static int mini_cm_dealloc_core(struct nes_cm_core *);
92static int mini_cm_get(struct nes_cm_core *);
93static int mini_cm_set(struct nes_cm_core *, u32, u32);
6492cdf3 94
6098d107 95static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
6492cdf3 96 void *, u32, void *, u32, u8);
6492cdf3
FL		 97static int add_ref_cm_node(struct nes_cm_node *);
98static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
99
1a855fbf
RD		 100static int nes_cm_disconn_true(struct nes_qp *);
101static int nes_cm_post_event(struct nes_cm_event *event);
102static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
103static void nes_disconnect_worker(struct work_struct *work);
6492cdf3
FL		 104
105static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
106static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
107static int send_reset(struct nes_cm_node *, struct sk_buff *);
108static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
1a855fbf 109static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
6492cdf3
FL		 110static void process_packet(struct nes_cm_node *, struct sk_buff *,
111 struct nes_cm_core *);
112
113static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
114static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
115static void cleanup_retrans_entry(struct nes_cm_node *);
116static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *,
117 enum nes_cm_event_type);
118static void free_retrans_entry(struct nes_cm_node *cm_node);
119static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
120 struct sk_buff *skb, int optionsize, int passive);
121
122/* CM event handler functions */
123static void cm_event_connected(struct nes_cm_event *);
124static void cm_event_connect_error(struct nes_cm_event *);
125static void cm_event_reset(struct nes_cm_event *);
126static void cm_event_mpa_req(struct nes_cm_event *);
127
128static void print_core(struct nes_cm_core *core);
3c2d774c
GS		 129
130/* External CM API Interface */
131/* instance of function pointers for client API */
132/* set address of this instance to cm_core->cm_ops at cm_core alloc */
133static struct nes_cm_ops nes_cm_api = {
134 mini_cm_accelerated,
135 mini_cm_listen,
136 mini_cm_del_listen,
137 mini_cm_connect,
138 mini_cm_close,
139 mini_cm_accept,
140 mini_cm_reject,
141 mini_cm_recv_pkt,
142 mini_cm_dealloc_core,
143 mini_cm_get,
144 mini_cm_set
145};
146
1a855fbf 147static struct nes_cm_core *g_cm_core;
3c2d774c
GS		 148
149atomic_t cm_connects;
150atomic_t cm_accepts;
151atomic_t cm_disconnects;
152atomic_t cm_closes;
153atomic_t cm_connecteds;
154atomic_t cm_connect_reqs;
155atomic_t cm_rejects;
156
157
158/**
159 * create_event
160 */
161static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
162 enum nes_cm_event_type type)
163{
164 struct nes_cm_event *event;
165
166 if (!cm_node->cm_id)
167 return NULL;
168
169 /* allocate an empty event */
170 event = kzalloc(sizeof(*event), GFP_ATOMIC);
171
172 if (!event)
173 return NULL;
174
175 event->type = type;
176 event->cm_node = cm_node;
177 event->cm_info.rem_addr = cm_node->rem_addr;
178 event->cm_info.loc_addr = cm_node->loc_addr;
179 event->cm_info.rem_port = cm_node->rem_port;
180 event->cm_info.loc_port = cm_node->loc_port;
181 event->cm_info.cm_id = cm_node->cm_id;
182
6492cdf3
FL		 183 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
184 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
185 cm_node, event, type, event->cm_info.loc_addr,
186 event->cm_info.loc_port, event->cm_info.rem_addr,
187 event->cm_info.rem_port);
3c2d774c
GS		 188
189 nes_cm_post_event(event);
190 return event;
191}
192
193
194/**
195 * send_mpa_request
196 */
6492cdf3 197static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c 198{
3c2d774c 199 int ret;
3c2d774c 200 if (!skb) {
6492cdf3 201 nes_debug(NES_DBG_CM, "skb set to NULL\n");
3c2d774c
GS		 202 return -1;
203 }
204
205 /* send an MPA Request frame */
206 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
207 cm_node->mpa_frame_size, SET_ACK);
208
209 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
6492cdf3 210 if (ret < 0)
3c2d774c 211 return ret;
3c2d774c
GS		 212
213 return 0;
214}
215
216
217/**
218 * recv_mpa - process a received TCP pkt, we are expecting an
219 * IETF MPA frame
220 */
221static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len)
222{
223 struct ietf_mpa_frame *mpa_frame;
224
225 /* assume req frame is in tcp data payload */
226 if (len < sizeof(struct ietf_mpa_frame)) {
227 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
228 return -1;
229 }
230
231 mpa_frame = (struct ietf_mpa_frame *)buffer;
232 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
233
234 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
235 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
236 " complete (%x + %x != %x)\n",
237 cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len);
238 return -1;
239 }
240
241 /* copy entire MPA frame to our cm_node's frame */
242 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
243 cm_node->mpa_frame_size);
244
245 return 0;
246}
247
248
3c2d774c
GS		 249/**
250 * form_cm_frame - get a free packet and build empty frame Use
251 * node info to build.
252 */
6098d107 253static void form_cm_frame(struct sk_buff *skb,
6492cdf3
FL		 254 struct nes_cm_node *cm_node, void *options, u32 optionsize,
255 void *data, u32 datasize, u8 flags)
3c2d774c
GS		 256{
257 struct tcphdr *tcph;
258 struct iphdr *iph;
259 struct ethhdr *ethh;
260 u8 *buf;
261 u16 packetsize = sizeof(*iph);
262
263 packetsize += sizeof(*tcph);
264 packetsize += optionsize + datasize;
265
266 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
267
268 skb->len = 0;
269 buf = skb_put(skb, packetsize + ETH_HLEN);
270
271 ethh = (struct ethhdr *) buf;
272 buf += ETH_HLEN;
273
274 iph = (struct iphdr *)buf;
275 buf += sizeof(*iph);
276 tcph = (struct tcphdr *)buf;
277 skb_reset_mac_header(skb);
278 skb_set_network_header(skb, ETH_HLEN);
279 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
280 buf += sizeof(*tcph);
281
282 skb->ip_summed = CHECKSUM_PARTIAL;
283 skb->protocol = htons(0x800);
284 skb->data_len = 0;
285 skb->mac_len = ETH_HLEN;
286
287 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
288 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
289 ethh->h_proto = htons(0x0800);
290
291 iph->version = IPVERSION;
292 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
293 iph->tos = 0;
294 iph->tot_len = htons(packetsize);
295 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
296
297 iph->frag_off = htons(0x4000);
298 iph->ttl = 0x40;
299 iph->protocol = 0x06; /* IPPROTO_TCP */
300
301 iph->saddr = htonl(cm_node->loc_addr);
302 iph->daddr = htonl(cm_node->rem_addr);
303
304 tcph->source = htons(cm_node->loc_port);
305 tcph->dest = htons(cm_node->rem_port);
306 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
307
308 if (flags & SET_ACK) {
309 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
310 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
311 tcph->ack = 1;
312 } else
313 tcph->ack_seq = 0;
314
315 if (flags & SET_SYN) {
316 cm_node->tcp_cntxt.loc_seq_num++;
317 tcph->syn = 1;
318 } else
6492cdf3 319 cm_node->tcp_cntxt.loc_seq_num += datasize;
3c2d774c 320
6492cdf3
FL		 321 if (flags & SET_FIN) {
322 cm_node->tcp_cntxt.loc_seq_num++;
3c2d774c 323 tcph->fin = 1;
6492cdf3 324 }
3c2d774c
GS		 325
326 if (flags & SET_RST)
327 tcph->rst = 1;
328
329 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
330 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
331 tcph->urg_ptr = 0;
332 if (optionsize)
333 memcpy(buf, options, optionsize);
334 buf += optionsize;
335 if (datasize)
336 memcpy(buf, data, datasize);
337
338 skb_shinfo(skb)->nr_frags = 0;
339 cm_packets_created++;
340
3c2d774c
GS		 341}
342
343
344/**
345 * print_core - dump a cm core
346 */
347static void print_core(struct nes_cm_core *core)
348{
349 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
350 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
351 if (!core)
352 return;
353 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
3c2d774c
GS		 354
355 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
356
3c2d774c
GS		 357 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
358 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
359
360 nes_debug(NES_DBG_CM, "core : %p \n", core);
361
362 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
363}
364
365
366/**
367 * schedule_nes_timer
368 * note - cm_node needs to be protected before calling this. Encase in:
369 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
370 */
371int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
372 enum nes_timer_type type, int send_retrans,
373 int close_when_complete)
374{
375 unsigned long flags;
6492cdf3 376 struct nes_cm_core *cm_core = cm_node->cm_core;
3c2d774c
GS		 377 struct nes_timer_entry *new_send;
378 int ret = 0;
379 u32 was_timer_set;
380
381 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
382 if (!new_send)
383 return -1;
3c2d774c
GS		 384
385 /* new_send->timetosend = currenttime */
386 new_send->retrycount = NES_DEFAULT_RETRYS;
387 new_send->retranscount = NES_DEFAULT_RETRANS;
388 new_send->skb = skb;
389 new_send->timetosend = jiffies;
390 new_send->type = type;
391 new_send->netdev = cm_node->netdev;
392 new_send->send_retrans = send_retrans;
393 new_send->close_when_complete = close_when_complete;
394
395 if (type == NES_TIMER_TYPE_CLOSE) {
6492cdf3 396 new_send->timetosend += (HZ/10);
3c2d774c
GS		 397 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
398 list_add_tail(&new_send->list, &cm_node->recv_list);
399 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
400 }
401
402 if (type == NES_TIMER_TYPE_SEND) {
b30db1c1 403 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
3c2d774c 404 atomic_inc(&new_send->skb->users);
6492cdf3
FL		 405 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
406 cm_node->send_entry = new_send;
407 add_ref_cm_node(cm_node);
408 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
409 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
3c2d774c
GS		 410
411 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
412 if (ret != NETDEV_TX_OK) {
6492cdf3
FL		 413 nes_debug(NES_DBG_CM, "Error sending packet %p "
414 "(jiffies = %lu)\n", new_send, jiffies);
3c2d774c
GS		 415 atomic_dec(&new_send->skb->users);
416 new_send->timetosend = jiffies;
417 } else {
418 cm_packets_sent++;
419 if (!send_retrans) {
6492cdf3 420 cleanup_retrans_entry(cm_node);
3c2d774c 421 if (close_when_complete)
6492cdf3 422 rem_ref_cm_node(cm_core, cm_node);
3c2d774c
GS		 423 return ret;
424 }
3c2d774c 425 }
3c2d774c 426 }
3c2d774c
GS		 427
428 was_timer_set = timer_pending(&cm_core->tcp_timer);
429
430 if (!was_timer_set) {
431 cm_core->tcp_timer.expires = new_send->timetosend;
432 add_timer(&cm_core->tcp_timer);
433 }
434
435 return ret;
436}
437
438
439/**
440 * nes_cm_timer_tick
441 */
1a855fbf 442static void nes_cm_timer_tick(unsigned long pass)
3c2d774c
GS		 443{
444 unsigned long flags, qplockflags;
445 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
446 struct iw_cm_id *cm_id;
447 struct nes_cm_node *cm_node;
448 struct nes_timer_entry *send_entry, *recv_entry;
449 struct list_head *list_core, *list_core_temp;
450 struct list_head *list_node, *list_node_temp;
451 struct nes_cm_core *cm_core = g_cm_core;
452 struct nes_qp *nesqp;
3c2d774c
GS		 453 u32 settimer = 0;
454 int ret = NETDEV_TX_OK;
6492cdf3 455 enum nes_cm_node_state last_state;
3c2d774c 456
879e5bd5
FL		 457 struct list_head timer_list;
458 INIT_LIST_HEAD(&timer_list);
3c2d774c
GS		 459 spin_lock_irqsave(&cm_core->ht_lock, flags);
460
6492cdf3 461 list_for_each_safe(list_node, list_core_temp,
879e5bd5 462 &cm_core->connected_nodes) {
3c2d774c 463 cm_node = container_of(list_node, struct nes_cm_node, list);
879e5bd5
FL		 464 if (!list_empty(&cm_node->recv_list) || (cm_node->send_entry)) {
465 add_ref_cm_node(cm_node);
466 list_add(&cm_node->timer_entry, &timer_list);
467 }
468 }
469 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
470
471 list_for_each_safe(list_node, list_core_temp, &timer_list) {
472 cm_node = container_of(list_node, struct nes_cm_node,
473 timer_entry);
3c2d774c 474 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
6492cdf3
FL		 475 list_for_each_safe(list_core, list_node_temp,
476 &cm_node->recv_list) {
477 recv_entry = container_of(list_core,
478 struct nes_timer_entry, list);
479 if (!recv_entry)
480 break;
481 if (time_after(recv_entry->timetosend, jiffies)) {
482 if (nexttimeout > recv_entry->timetosend ||
483 !settimer) {
3c2d774c
GS		 484 nexttimeout = recv_entry->timetosend;
485 settimer = 1;
486 }
487 continue;
488 }
489 list_del(&recv_entry->list);
490 cm_id = cm_node->cm_id;
491 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
6492cdf3
FL		 492 nesqp = (struct nes_qp *)recv_entry->skb;
493 spin_lock_irqsave(&nesqp->lock, qplockflags);
494 if (nesqp->cm_id) {
495 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
496 "refcount = %d: HIT A "
497 "NES_TIMER_TYPE_CLOSE with something "
498 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
499 atomic_read(&nesqp->refcount));
500 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
501 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
502 nesqp->ibqp_state = IB_QPS_ERR;
503 spin_unlock_irqrestore(&nesqp->lock,
504 qplockflags);
505 nes_cm_disconn(nesqp);
506 } else {
507 spin_unlock_irqrestore(&nesqp->lock,
508 qplockflags);
509 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
510 "refcount = %d: HIT A "
511 "NES_TIMER_TYPE_CLOSE with nothing "
512 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
513 atomic_read(&nesqp->refcount));
3c2d774c 514 }
6492cdf3
FL		 515 if (cm_id)
516 cm_id->rem_ref(cm_id);
517
3c2d774c
GS		 518 kfree(recv_entry);
519 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
520 }
521 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
522
523 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
6492cdf3
FL		 524 do {
525 send_entry = cm_node->send_entry;
526 if (!send_entry)
c5d321e5 527 break;
3c2d774c
GS		 528 if (time_after(send_entry->timetosend, jiffies)) {
529 if (cm_node->state != NES_CM_STATE_TSA) {
6492cdf3
FL		 530 if ((nexttimeout >
531 send_entry->timetosend) ||
532 !settimer) {
533 nexttimeout =
534 send_entry->timetosend;
3c2d774c 535 settimer = 1;
c5d321e5 536 break;
3c2d774c 537 }
3c2d774c 538 } else {
6492cdf3 539 free_retrans_entry(cm_node);
c5d321e5 540 break;
3c2d774c
GS		 541 }
542 }
6492cdf3
FL		 543
544 if ((cm_node->state == NES_CM_STATE_TSA) ||
545 (cm_node->state == NES_CM_STATE_CLOSED)) {
546 free_retrans_entry(cm_node);
c5d321e5 547 break;
3c2d774c
GS		 548 }
549
6492cdf3
FL		 550 if (!send_entry->retranscount ||
551 !send_entry->retrycount) {
3c2d774c 552 cm_packets_dropped++;
6492cdf3
FL		 553 last_state = cm_node->state;
554 cm_node->state = NES_CM_STATE_CLOSED;
555 free_retrans_entry(cm_node);
556 spin_unlock_irqrestore(
557 &cm_node->retrans_list_lock, flags);
558 if (last_state == NES_CM_STATE_SYN_RCVD)
3c2d774c 559 rem_ref_cm_node(cm_core, cm_node);
6492cdf3
FL		 560 else
561 create_event(cm_node,
562 NES_CM_EVENT_ABORTED);
563 spin_lock_irqsave(&cm_node->retrans_list_lock,
564 flags);
c5d321e5 565 break;
3c2d774c 566 }
3c2d774c
GS		 567 atomic_inc(&send_entry->skb->users);
568 cm_packets_retrans++;
6492cdf3
FL		 569 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
570 "for node %p, jiffies = %lu, time to send = "
571 "%lu, retranscount = %u, send_entry->seq_num = "
572 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
573 "0x%08X\n", send_entry, cm_node, jiffies,
574 send_entry->timetosend,
575 send_entry->retranscount,
576 send_entry->seq_num,
577 cm_node->tcp_cntxt.rem_ack_num);
578
579 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
580 flags);
3c2d774c 581 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
6492cdf3 582 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
3c2d774c 583 if (ret != NETDEV_TX_OK) {
6492cdf3
FL		 584 nes_debug(NES_DBG_CM, "rexmit failed for "
585 "node=%p\n", cm_node);
3c2d774c
GS		 586 cm_packets_bounced++;
587 atomic_dec(&send_entry->skb->users);
588 send_entry->retrycount--;
589 nexttimeout = jiffies + NES_SHORT_TIME;
590 settimer = 1;
c5d321e5 591 break;
3c2d774c
GS		 592 } else {
593 cm_packets_sent++;
594 }
6492cdf3
FL		 595 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
596 "%u, retry count = %u.\n",
597 send_entry->retranscount,
598 send_entry->retrycount);
3c2d774c
GS		 599 if (send_entry->send_retrans) {
600 send_entry->retranscount--;
6492cdf3
FL		 601 send_entry->timetosend = jiffies +
602 NES_RETRY_TIMEOUT;
603 if (nexttimeout > send_entry->timetosend ||
604 !settimer) {
3c2d774c
GS		 605 nexttimeout = send_entry->timetosend;
606 settimer = 1;
607 }
3c2d774c
GS		 608 } else {
609 int close_when_complete;
6492cdf3
FL		 610 close_when_complete =
611 send_entry->close_when_complete;
612 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
613 cm_node, cm_node->state);
614 free_retrans_entry(cm_node);
615 if (close_when_complete)
616 rem_ref_cm_node(cm_node->cm_core,
617 cm_node);
3c2d774c 618 }
6492cdf3 619 } while (0);
3c2d774c 620
6492cdf3
FL		 621 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
622 rem_ref_cm_node(cm_node->cm_core, cm_node);
6492cdf3
FL		 623 if (ret != NETDEV_TX_OK) {
624 nes_debug(NES_DBG_CM, "rexmit failed for cm_node=%p\n",
625 cm_node);
3c2d774c 626 break;
6492cdf3 627 }
3c2d774c 628 }
3c2d774c
GS		 629
630 if (settimer) {
631 if (!timer_pending(&cm_core->tcp_timer)) {
632 cm_core->tcp_timer.expires = nexttimeout;
633 add_timer(&cm_core->tcp_timer);
634 }
635 }
636}
637
638
639/**
640 * send_syn
641 */
6492cdf3
FL		 642static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
643 struct sk_buff *skb)
3c2d774c
GS		 644{
645 int ret;
646 int flags = SET_SYN;
3c2d774c 647 char optionsbuffer[sizeof(struct option_mss) +
6492cdf3
FL		 648 sizeof(struct option_windowscale) + sizeof(struct option_base) +
649 TCP_OPTIONS_PADDING];
3c2d774c
GS		 650
651 int optionssize = 0;
652 /* Sending MSS option */
653 union all_known_options *options;
654
655 if (!cm_node)
656 return -EINVAL;
657
658 options = (union all_known_options *)&optionsbuffer[optionssize];
659 options->as_mss.optionnum = OPTION_NUMBER_MSS;
660 options->as_mss.length = sizeof(struct option_mss);
661 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
662 optionssize += sizeof(struct option_mss);
663
664 options = (union all_known_options *)&optionsbuffer[optionssize];
665 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
666 options->as_windowscale.length = sizeof(struct option_windowscale);
667 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
668 optionssize += sizeof(struct option_windowscale);
669
6492cdf3 670 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
3c2d774c
GS		 671 options = (union all_known_options *)&optionsbuffer[optionssize];
672 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
673 options->as_base.length = sizeof(struct option_base);
674 optionssize += sizeof(struct option_base);
675 /* we need the size to be a multiple of 4 */
676 options = (union all_known_options *)&optionsbuffer[optionssize];
677 options->as_end = 1;
678 optionssize += 1;
679 options = (union all_known_options *)&optionsbuffer[optionssize];
680 options->as_end = 1;
681 optionssize += 1;
682 }
683
684 options = (union all_known_options *)&optionsbuffer[optionssize];
685 options->as_end = OPTION_NUMBER_END;
686 optionssize += 1;
687
6492cdf3 688 if (!skb)
e189062a 689 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 690 if (!skb) {
691 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
692 return -1;
693 }
694
695 if (sendack)
696 flags |= SET_ACK;
697
698 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
699 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
700
701 return ret;
702}
703
704
705/**
706 * send_reset
707 */
6492cdf3 708static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 709{
710 int ret;
3c2d774c
GS		 711 int flags = SET_RST | SET_ACK;
712
6492cdf3 713 if (!skb)
e189062a 714 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 715 if (!skb) {
716 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
717 return -1;
718 }
719
3c2d774c
GS		 720 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
721 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
722
723 return ret;
724}
725
726
727/**
728 * send_ack
729 */
6492cdf3 730static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 731{
732 int ret;
6492cdf3
FL		 733
734 if (!skb)
e189062a 735 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 736
737 if (!skb) {
738 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
739 return -1;
740 }
741
742 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
743 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
744
745 return ret;
746}
747
748
749/**
750 * send_fin
751 */
1a855fbf 752static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 753{
754 int ret;
755
756 /* if we didn't get a frame get one */
757 if (!skb)
e189062a 758 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 759
760 if (!skb) {
761 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
762 return -1;
763 }
764
765 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
766 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
767
768 return ret;
769}
770
771
3c2d774c
GS		 772/**
773 * find_node - find a cm node that matches the reference cm node
774 */
775static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
776 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
777{
778 unsigned long flags;
3c2d774c
GS		 779 struct list_head *hte;
780 struct nes_cm_node *cm_node;
781
3c2d774c
GS		 782 /* get a handle on the hte */
783 hte = &cm_core->connected_nodes;
784
63779436
HH		 785 nes_debug(NES_DBG_CM, "Searching for an owner node: %pI4:%x from core %p->%p\n",
786 &loc_addr, loc_port, cm_core, hte);
3c2d774c
GS		 787
788 /* walk list and find cm_node associated with this session ID */
789 spin_lock_irqsave(&cm_core->ht_lock, flags);
4e96a774 790 list_for_each_entry(cm_node, hte, list) {
3c2d774c
GS		 791 /* compare quad, return node handle if a match */
792 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
793 cm_node->loc_addr, cm_node->loc_port,
794 loc_addr, loc_port,
795 cm_node->rem_addr, cm_node->rem_port,
796 rem_addr, rem_port);
797 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
798 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
799 add_ref_cm_node(cm_node);
800 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
801 return cm_node;
802 }
803 }
804 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
805
806 /* no owner node */
807 return NULL;
808}
809
810
811/**
812 * find_listener - find a cm node listening on this addr-port pair
813 */
814static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
815 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
816{
817 unsigned long flags;
3c2d774c
GS		 818 struct nes_cm_listener *listen_node;
819
820 /* walk list and find cm_node associated with this session ID */
821 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4e96a774 822 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
3c2d774c
GS		 823 /* compare node pair, return node handle if a match */
824 if (((listen_node->loc_addr == dst_addr) ||
825 listen_node->loc_addr == 0x00000000) &&
826 (listen_node->loc_port == dst_port) &&
827 (listener_state & listen_node->listener_state)) {
828 atomic_inc(&listen_node->ref_count);
829 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
830 return listen_node;
831 }
832 }
833 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
834
63779436
HH		 835 nes_debug(NES_DBG_CM, "Unable to find listener for %pI4:%x\n",
836 &dst_addr, dst_port);
3c2d774c
GS		 837
838 /* no listener */
839 return NULL;
840}
841
842
843/**
844 * add_hte_node - add a cm node to the hash table
845 */
846static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
847{
848 unsigned long flags;
3c2d774c
GS		 849 struct list_head *hte;
850
851 if (!cm_node || !cm_core)
852 return -EINVAL;
853
6492cdf3
FL		 854 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
855 cm_node);
3c2d774c 856
3c2d774c
GS		 857 spin_lock_irqsave(&cm_core->ht_lock, flags);
858
859 /* get a handle on the hash table element (list head for this slot) */
860 hte = &cm_core->connected_nodes;
861 list_add_tail(&cm_node->list, hte);
862 atomic_inc(&cm_core->ht_node_cnt);
863
864 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
865
866 return 0;
867}
868
869
870/**
871 * mini_cm_dec_refcnt_listen
872 */
873static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
6492cdf3 874 struct nes_cm_listener *listener, int free_hanging_nodes)
3c2d774c
GS		 875{
876 int ret = 1;
877 unsigned long flags;
6492cdf3
FL		 878 struct list_head *list_pos = NULL;
879 struct list_head *list_temp = NULL;
880 struct nes_cm_node *cm_node = NULL;
879e5bd5 881 struct list_head reset_list;
6492cdf3
FL		 882
883 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
884 "refcnt=%d\n", listener, free_hanging_nodes,
885 atomic_read(&listener->ref_count));
886 /* free non-accelerated child nodes for this listener */
879e5bd5 887 INIT_LIST_HEAD(&reset_list);
6492cdf3
FL		 888 if (free_hanging_nodes) {
889 spin_lock_irqsave(&cm_core->ht_lock, flags);
890 list_for_each_safe(list_pos, list_temp,
879e5bd5 891 &g_cm_core->connected_nodes) {
6492cdf3
FL		 892 cm_node = container_of(list_pos, struct nes_cm_node,
893 list);
894 if ((cm_node->listener == listener) &&
879e5bd5
FL		 895 (!cm_node->accelerated)) {
896 add_ref_cm_node(cm_node);
897 list_add(&cm_node->reset_entry, &reset_list);
6492cdf3
FL		 898 }
899 }
900 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
901 }
879e5bd5
FL		 902
903 list_for_each_safe(list_pos, list_temp, &reset_list) {
904 cm_node = container_of(list_pos, struct nes_cm_node,
905 reset_entry);
906 cleanup_retrans_entry(cm_node);
907 send_reset(cm_node, NULL);
908 rem_ref_cm_node(cm_node->cm_core, cm_node);
909 }
910
3c2d774c
GS		 911 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
912 if (!atomic_dec_return(&listener->ref_count)) {
913 list_del(&listener->list);
914
915 /* decrement our listen node count */
916 atomic_dec(&cm_core->listen_node_cnt);
917
918 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
919
920 if (listener->nesvnic) {
921 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
922 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
923 }
924
925 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
926
927 kfree(listener);
a2e9c384 928 listener = NULL;
3c2d774c
GS		 929 ret = 0;
930 cm_listens_destroyed++;
931 } else {
932 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
933 }
934 if (listener) {
935 if (atomic_read(&listener->pend_accepts_cnt) > 0)
936 nes_debug(NES_DBG_CM, "destroying listener (%p)"
937 " with non-zero pending accepts=%u\n",
938 listener, atomic_read(&listener->pend_accepts_cnt));
939 }
940
941 return ret;
942}
943
944
945/**
946 * mini_cm_del_listen
947 */
948static int mini_cm_del_listen(struct nes_cm_core *cm_core,
949 struct nes_cm_listener *listener)
950{
951 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
952 listener->cm_id = NULL; /* going to be destroyed pretty soon */
953 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
954}
955
956
957/**
958 * mini_cm_accelerated
959 */
960static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
961 struct nes_cm_node *cm_node)
962{
963 u32 was_timer_set;
964 cm_node->accelerated = 1;
965
966 if (cm_node->accept_pend) {
967 BUG_ON(!cm_node->listener);
968 atomic_dec(&cm_node->listener->pend_accepts_cnt);
969 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
970 }
971
972 was_timer_set = timer_pending(&cm_core->tcp_timer);
973 if (!was_timer_set) {
974 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
975 add_timer(&cm_core->tcp_timer);
976 }
977
978 return 0;
979}
980
981
982/**
7191a0a1 983 * nes_addr_resolve_neigh
3c2d774c 984 */
7191a0a1 985static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
3c2d774c
GS		 986{
987 struct rtable *rt;
988 struct flowi fl;
7191a0a1
BS		 989 struct neighbour *neigh;
990 int rc = -1;
3c2d774c
GS		 991
992 memset(&fl, 0, sizeof fl);
993 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
994 if (ip_route_output_key(&init_net, &rt, &fl)) {
995 printk("%s: ip_route_output_key failed for 0x%08X\n",
33718363 996 __func__, dst_ip);
7191a0a1 997 return rc;
3c2d774c
GS		 998 }
999
7191a0a1
BS		 1000 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1001 if (neigh) {
1002 if (neigh->nud_state & NUD_VALID) {
1003 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
e174961c
JB		 1004 " is %pM, Gateway is 0x%08X \n", dst_ip,
1005 neigh->ha, ntohl(rt->rt_gateway));
7191a0a1
BS		 1006 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1007 dst_ip, NES_ARP_ADD);
1008 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1009 NES_ARP_RESOLVE);
1010 }
1011 neigh_release(neigh);
1012 }
1013
1014 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1015 neigh_event_send(rt->u.dst.neighbour, NULL);
1016
3c2d774c 1017 ip_rt_put(rt);
7191a0a1 1018 return rc;
3c2d774c
GS		 1019}
1020
1021
1022/**
1023 * make_cm_node - create a new instance of a cm node
1024 */
1025static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1026 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1027 struct nes_cm_listener *listener)
1028{
1029 struct nes_cm_node *cm_node;
1030 struct timespec ts;
1031 int arpindex = 0;
1032 struct nes_device *nesdev;
1033 struct nes_adapter *nesadapter;
1034
1035 /* create an hte and cm_node for this instance */
1036 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1037 if (!cm_node)
1038 return NULL;
1039
1040 /* set our node specific transport info */
1041 cm_node->loc_addr = cm_info->loc_addr;
1042 cm_node->rem_addr = cm_info->rem_addr;
1043 cm_node->loc_port = cm_info->loc_port;
1044 cm_node->rem_port = cm_info->rem_port;
1045 cm_node->send_write0 = send_first;
63779436
HH		 1046 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1047 &cm_node->loc_addr, cm_node->loc_port,
1048 &cm_node->rem_addr, cm_node->rem_port);
3c2d774c
GS		 1049 cm_node->listener = listener;
1050 cm_node->netdev = nesvnic->netdev;
1051 cm_node->cm_id = cm_info->cm_id;
1052 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1053
6492cdf3
FL		 1054 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1055 cm_node->cm_id);
3c2d774c 1056
3c2d774c
GS		 1057 spin_lock_init(&cm_node->retrans_list_lock);
1058 INIT_LIST_HEAD(&cm_node->recv_list);
1059 spin_lock_init(&cm_node->recv_list_lock);
1060
1061 cm_node->loopbackpartner = NULL;
1062 atomic_set(&cm_node->ref_count, 1);
1063 /* associate our parent CM core */
1064 cm_node->cm_core = cm_core;
1065 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1066 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1067 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1068 NES_CM_DEFAULT_RCV_WND_SCALE;
1069 ts = current_kernel_time();
1070 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1071 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
f2b2b59b 1072 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
3c2d774c
GS		 1073 cm_node->tcp_cntxt.rcv_nxt = 0;
1074 /* get a unique session ID , add thread_id to an upcounter to handle race */
1075 atomic_inc(&cm_core->node_cnt);
3c2d774c
GS		 1076 cm_node->conn_type = cm_info->conn_type;
1077 cm_node->apbvt_set = 0;
1078 cm_node->accept_pend = 0;
1079
1080 cm_node->nesvnic = nesvnic;
1081 /* get some device handles, for arp lookup */
1082 nesdev = nesvnic->nesdev;
1083 nesadapter = nesdev->nesadapter;
1084
1085 cm_node->loopbackpartner = NULL;
1086 /* get the mac addr for the remote node */
1ee86555
CT		 1087 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1088 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1089 else
1090 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
3c2d774c 1091 if (arpindex < 0) {
7191a0a1
BS		 1092 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1093 if (arpindex < 0) {
1094 kfree(cm_node);
1095 return NULL;
1096 }
3c2d774c
GS		 1097 }
1098
1099 /* copy the mac addr to node context */
1100 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
e174961c
JB		 1101 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1102 cm_node->rem_mac);
3c2d774c
GS		 1103
1104 add_hte_node(cm_core, cm_node);
1105 atomic_inc(&cm_nodes_created);
1106
1107 return cm_node;
1108}
1109
1110
1111/**
1112 * add_ref_cm_node - destroy an instance of a cm node
1113 */
1114static int add_ref_cm_node(struct nes_cm_node *cm_node)
1115{
1116 atomic_inc(&cm_node->ref_count);
1117 return 0;
1118}
1119
1120
1121/**
1122 * rem_ref_cm_node - destroy an instance of a cm node
1123 */
1124static int rem_ref_cm_node(struct nes_cm_core *cm_core,
6492cdf3 1125 struct nes_cm_node *cm_node)
3c2d774c
GS		 1126{
1127 unsigned long flags, qplockflags;
3c2d774c
GS		 1128 struct nes_timer_entry *recv_entry;
1129 struct iw_cm_id *cm_id;
1130 struct list_head *list_core, *list_node_temp;
1131 struct nes_qp *nesqp;
1132
1133 if (!cm_node)
1134 return -EINVAL;
1135
1136 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1137 if (atomic_dec_return(&cm_node->ref_count)) {
1138 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1139 return 0;
1140 }
1141 list_del(&cm_node->list);
1142 atomic_dec(&cm_core->ht_node_cnt);
1143 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1144
1145 /* if the node is destroyed before connection was accelerated */
1146 if (!cm_node->accelerated && cm_node->accept_pend) {
1147 BUG_ON(!cm_node->listener);
1148 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1149 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1150 }
6492cdf3 1151 BUG_ON(cm_node->send_entry);
3c2d774c
GS		 1152 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1153 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
6492cdf3
FL		 1154 recv_entry = container_of(list_core, struct nes_timer_entry,
1155 list);
3c2d774c
GS		 1156 list_del(&recv_entry->list);
1157 cm_id = cm_node->cm_id;
1158 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
6492cdf3
FL		 1159 nesqp = (struct nes_qp *)recv_entry->skb;
1160 spin_lock_irqsave(&nesqp->lock, qplockflags);
1161 if (nesqp->cm_id) {
1162 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1163 "NES_TIMER_TYPE_CLOSE with something to do!\n",
1164 nesqp->hwqp.qp_id, cm_id);
1165 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1166 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1167 nesqp->ibqp_state = IB_QPS_ERR;
1168 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1169 nes_cm_disconn(nesqp);
1170 } else {
1171 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1172 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1173 "NES_TIMER_TYPE_CLOSE with nothing to do!\n",
1174 nesqp->hwqp.qp_id, cm_id);
3c2d774c 1175 }
6492cdf3
FL		 1176 cm_id->rem_ref(cm_id);
1177
3c2d774c
GS		 1178 kfree(recv_entry);
1179 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1180 }
1181 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1182
1183 if (cm_node->listener) {
1184 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1185 } else {
1186 if (cm_node->apbvt_set && cm_node->nesvnic) {
1187 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
6492cdf3
FL		 1188 PCI_FUNC(
1189 cm_node->nesvnic->nesdev->pcidev->devfn),
1190 NES_MANAGE_APBVT_DEL);
3c2d774c
GS		 1191 }
1192 }
1193
3c2d774c
GS		 1194 atomic_dec(&cm_core->node_cnt);
1195 atomic_inc(&cm_nodes_destroyed);
6492cdf3
FL		 1196 nesqp = cm_node->nesqp;
1197 if (nesqp) {
1198 nesqp->cm_node = NULL;
1199 nes_rem_ref(&nesqp->ibqp);
1200 cm_node->nesqp = NULL;
1201 }
3c2d774c 1202
6492cdf3
FL		 1203 cm_node->freed = 1;
1204 kfree(cm_node);
3c2d774c
GS		 1205 return 0;
1206}
1207
3c2d774c
GS		 1208/**
1209 * process_options
1210 */
6492cdf3
FL		 1211static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1212 u32 optionsize, u32 syn_packet)
3c2d774c
GS		 1213{
1214 u32 tmp;
1215 u32 offset = 0;
1216 union all_known_options *all_options;
1217 char got_mss_option = 0;
1218
1219 while (offset < optionsize) {
1220 all_options = (union all_known_options *)(optionsloc + offset);
1221 switch (all_options->as_base.optionnum) {
6492cdf3
FL		 1222 case OPTION_NUMBER_END:
1223 offset = optionsize;
1224 break;
1225 case OPTION_NUMBER_NONE:
1226 offset += 1;
1227 continue;
1228 case OPTION_NUMBER_MSS:
1229 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1230 "Size: %d\n", __func__,
1231 all_options->as_mss.length, offset, optionsize);
1232 got_mss_option = 1;
1233 if (all_options->as_mss.length != 4) {
1234 return 1;
1235 } else {
1236 tmp = ntohs(all_options->as_mss.mss);
1237 if (tmp > 0 && tmp <
1238 cm_node->tcp_cntxt.mss)
1239 cm_node->tcp_cntxt.mss = tmp;
1240 }
1241 break;
1242 case OPTION_NUMBER_WINDOW_SCALE:
1243 cm_node->tcp_cntxt.snd_wscale =
1244 all_options->as_windowscale.shiftcount;
1245 break;
1246 case OPTION_NUMBER_WRITE0:
1247 cm_node->send_write0 = 1;
1248 break;
1249 default:
1250 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1251 all_options->as_base.optionnum);
1252 break;
3c2d774c
GS		 1253 }
1254 offset += all_options->as_base.length;
1255 }
1256 if ((!got_mss_option) && (syn_packet))
1257 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1258 return 0;
1259}
1260
6492cdf3
FL		 1261static void drop_packet(struct sk_buff *skb)
1262{
1263 atomic_inc(&cm_accel_dropped_pkts);
1264 dev_kfree_skb_any(skb);
1265}
3c2d774c 1266
6492cdf3
FL		 1267static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1268 struct tcphdr *tcph)
3c2d774c 1269{
6492cdf3
FL		 1270 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1271 "refcnt=%d\n", cm_node, cm_node->state,
1272 atomic_read(&cm_node->ref_count));
1273 cm_node->tcp_cntxt.rcv_nxt++;
1274 cleanup_retrans_entry(cm_node);
1275 switch (cm_node->state) {
1276 case NES_CM_STATE_SYN_RCVD:
1277 case NES_CM_STATE_SYN_SENT:
1278 case NES_CM_STATE_ESTABLISHED:
1279 case NES_CM_STATE_MPAREQ_SENT:
1280 cm_node->state = NES_CM_STATE_LAST_ACK;
1281 send_fin(cm_node, skb);
1282 break;
1283 case NES_CM_STATE_FIN_WAIT1:
1284 cm_node->state = NES_CM_STATE_CLOSING;
1285 send_ack(cm_node, skb);
1286 break;
1287 case NES_CM_STATE_FIN_WAIT2:
1288 cm_node->state = NES_CM_STATE_TIME_WAIT;
1289 send_ack(cm_node, skb);
1290 cm_node->state = NES_CM_STATE_CLOSED;
1291 break;
1292 case NES_CM_STATE_TSA:
1293 default:
1294 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1295 cm_node, cm_node->state);
1296 drop_packet(skb);
1297 break;
3c2d774c 1298 }
6492cdf3 1299}
3c2d774c 1300
3c2d774c 1301
6492cdf3
FL		 1302static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1303 struct tcphdr *tcph)
1304{
3c2d774c 1305
6492cdf3 1306 int reset = 0; /* whether to send reset in case of err.. */
183ecfa3 1307 int passive_state;
6492cdf3
FL		 1308 atomic_inc(&cm_resets_recvd);
1309 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1310 " refcnt=%d\n", cm_node, cm_node->state,
1311 atomic_read(&cm_node->ref_count));
1312 cleanup_retrans_entry(cm_node);
1313 switch (cm_node->state) {
1314 case NES_CM_STATE_SYN_SENT:
1315 case NES_CM_STATE_MPAREQ_SENT:
1316 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1317 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1318 cm_node->listener, cm_node->state);
1319 active_open_err(cm_node, skb, reset);
1320 break;
183ecfa3
FL		 1321 case NES_CM_STATE_MPAREQ_RCVD:
1322 passive_state = atomic_add_return(1, &cm_node->passive_state);
1323 if (passive_state == NES_SEND_RESET_EVENT)
1324 create_event(cm_node, NES_CM_EVENT_RESET);
1325 cleanup_retrans_entry(cm_node);
1326 cm_node->state = NES_CM_STATE_CLOSED;
1327 dev_kfree_skb_any(skb);
1328 break;
6492cdf3
FL		 1329 case NES_CM_STATE_ESTABLISHED:
1330 case NES_CM_STATE_SYN_RCVD:
1331 case NES_CM_STATE_LISTENING:
1332 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1333 passive_open_err(cm_node, skb, reset);
1334 break;
1335 case NES_CM_STATE_TSA:
183ecfa3
FL		 1336 active_open_err(cm_node, skb, reset);
1337 break;
1338 case NES_CM_STATE_CLOSED:
1339 cleanup_retrans_entry(cm_node);
1340 drop_packet(skb);
1341 break;
6492cdf3 1342 default:
183ecfa3 1343 drop_packet(skb);
6492cdf3
FL		 1344 break;
1345 }
1346}
3c2d774c 1347
6492cdf3
FL		 1348static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb,
1349 enum nes_cm_event_type type)
1350{
1351
1352 int ret;
1353 int datasize = skb->len;
1354 u8 *dataloc = skb->data;
1355 ret = parse_mpa(cm_node, dataloc, datasize);
1356 if (ret < 0) {
1357 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1358 if (type == NES_CM_EVENT_CONNECTED) {
1359 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1360 "cm_node=%p listener=%p state=%d\n", __func__,
1361 __LINE__, cm_node, cm_node->listener,
1362 cm_node->state);
1363 active_open_err(cm_node, skb, 1);
1364 } else {
1365 passive_open_err(cm_node, skb, 1);
3c2d774c 1366 }
6492cdf3
FL		 1367 } else {
1368 cleanup_retrans_entry(cm_node);
1369 dev_kfree_skb_any(skb);
1370 if (type == NES_CM_EVENT_CONNECTED)
1371 cm_node->state = NES_CM_STATE_TSA;
183ecfa3
FL		 1372 else
1373 atomic_set(&cm_node->passive_state,
1374 NES_PASSIVE_STATE_INDICATED);
6492cdf3
FL		 1375 create_event(cm_node, type);
1376
1377 }
1378 return ;
1379}
1380
1381static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1382{
1383 switch (cm_node->state) {
1384 case NES_CM_STATE_SYN_SENT:
1385 case NES_CM_STATE_MPAREQ_SENT:
1386 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1387 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1388 cm_node->listener, cm_node->state);
1389 active_open_err(cm_node, skb, 1);
1390 break;
1391 case NES_CM_STATE_ESTABLISHED:
1392 case NES_CM_STATE_SYN_RCVD:
1393 passive_open_err(cm_node, skb, 1);
1394 break;
1395 case NES_CM_STATE_TSA:
1396 default:
1397 drop_packet(skb);
3c2d774c 1398 }
6492cdf3
FL		 1399}
1400
1401static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1402 struct sk_buff *skb)
1403{
1404 int err;
1405
1406 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1407 if (err)
1408 active_open_err(cm_node, skb, 1);
1409
1410 return err;
1411}
1412
1413static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1414 struct sk_buff *skb)
1415{
1416 int err = 0;
1417 u32 seq;
1418 u32 ack_seq;
1419 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1420 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1421 u32 rcv_wnd;
1422 seq = ntohl(tcph->seq);
1423 ack_seq = ntohl(tcph->ack_seq);
1424 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1425 if (ack_seq != loc_seq_num)
1426 err = 1;
1427 else if ((seq + rcv_wnd) < rcv_nxt)
1428 err = 1;
1429 if (err) {
1430 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1431 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1432 cm_node->listener, cm_node->state);
1433 indicate_pkt_err(cm_node, skb);
1434 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1435 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1436 rcv_wnd);
1437 }
1438 return err;
1439}
1440
1441/*
1442 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1443 * is created with a listener or it may comein as rexmitted packet which in
1444 * that case will be just dropped.
1445 */
1446
1447static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1448 struct tcphdr *tcph)
1449{
1450 int ret;
1451 u32 inc_sequence;
1452 int optionsize;
3c2d774c
GS		 1453
1454 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 1455 skb_trim(skb, 0);
6492cdf3 1456 inc_sequence = ntohl(tcph->seq);
3c2d774c 1457
6492cdf3
FL		 1458 switch (cm_node->state) {
1459 case NES_CM_STATE_SYN_SENT:
1460 case NES_CM_STATE_MPAREQ_SENT:
1461 /* Rcvd syn on active open connection*/
1462 active_open_err(cm_node, skb, 1);
1463 break;
1464 case NES_CM_STATE_LISTENING:
1465 /* Passive OPEN */
1466 cm_node->accept_pend = 1;
1467 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1468 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1469 cm_node->listener->backlog) {
1470 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1471 "pressure \n");
1472 cm_backlog_drops++;
1473 passive_open_err(cm_node, skb, 0);
1474 break;
1475 }
1476 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1477 1);
1478 if (ret) {
1479 passive_open_err(cm_node, skb, 0);
1480 /* drop pkt */
1481 break;
1482 }
1483 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1484 BUG_ON(cm_node->send_entry);
1485 cm_node->state = NES_CM_STATE_SYN_RCVD;
1486 send_syn(cm_node, 1, skb);
1487 break;
abb77256
FL		 1488 case NES_CM_STATE_CLOSED:
1489 cleanup_retrans_entry(cm_node);
1490 send_reset(cm_node, skb);
1491 break;
6492cdf3
FL		 1492 case NES_CM_STATE_TSA:
1493 case NES_CM_STATE_ESTABLISHED:
1494 case NES_CM_STATE_FIN_WAIT1:
1495 case NES_CM_STATE_FIN_WAIT2:
1496 case NES_CM_STATE_MPAREQ_RCVD:
1497 case NES_CM_STATE_LAST_ACK:
1498 case NES_CM_STATE_CLOSING:
1499 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 1500 default:
1501 drop_packet(skb);
1502 break;
1503 }
1504}
1505
1506static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1507 struct tcphdr *tcph)
1508{
1509
1510 int ret;
1511 u32 inc_sequence;
1512 int optionsize;
1513
1514 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 1515 skb_trim(skb, 0);
6492cdf3
FL		 1516 inc_sequence = ntohl(tcph->seq);
1517 switch (cm_node->state) {
1518 case NES_CM_STATE_SYN_SENT:
1519 /* active open */
1520 if (check_syn(cm_node, tcph, skb))
1521 return;
1522 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1523 /* setup options */
1524 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1525 if (ret) {
1526 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1527 cm_node);
1528 break;
1529 }
1530 cleanup_retrans_entry(cm_node);
1531 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1532 send_mpa_request(cm_node, skb);
1533 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1534 break;
1535 case NES_CM_STATE_MPAREQ_RCVD:
1536 /* passive open, so should not be here */
1537 passive_open_err(cm_node, skb, 1);
1538 break;
abb77256
FL		 1539 case NES_CM_STATE_LISTENING:
1540 case NES_CM_STATE_CLOSED:
1541 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1542 cleanup_retrans_entry(cm_node);
1543 send_reset(cm_node, skb);
1544 break;
6492cdf3
FL		 1545 case NES_CM_STATE_ESTABLISHED:
1546 case NES_CM_STATE_FIN_WAIT1:
1547 case NES_CM_STATE_FIN_WAIT2:
1548 case NES_CM_STATE_LAST_ACK:
1549 case NES_CM_STATE_TSA:
1550 case NES_CM_STATE_CLOSING:
1551 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 1552 case NES_CM_STATE_MPAREQ_SENT:
1553 default:
1554 drop_packet(skb);
1555 break;
1556 }
1557}
3c2d774c 1558
6492cdf3
FL		 1559static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1560 struct tcphdr *tcph)
1561{
1562 int datasize = 0;
1563 u32 inc_sequence;
1564 u32 rem_seq_ack;
1565 u32 rem_seq;
abb77256
FL		 1566 int ret;
1567 int optionsize;
1568 u32 temp_seq = cm_node->tcp_cntxt.loc_seq_num;
1569
1570 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1571 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1572
6492cdf3
FL		 1573 if (check_seq(cm_node, tcph, skb))
1574 return;
1575
1576 skb_pull(skb, tcph->doff << 2);
3c2d774c 1577 inc_sequence = ntohl(tcph->seq);
6492cdf3
FL		 1578 rem_seq = ntohl(tcph->seq);
1579 rem_seq_ack = ntohl(tcph->ack_seq);
1580 datasize = skb->len;
1581
1582 switch (cm_node->state) {
1583 case NES_CM_STATE_SYN_RCVD:
1584 /* Passive OPEN */
abb77256
FL		 1585 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1586 if (ret)
1587 break;
6492cdf3 1588 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
abb77256
FL		 1589 cm_node->tcp_cntxt.loc_seq_num = temp_seq;
1590 if (cm_node->tcp_cntxt.rem_ack_num !=
1591 cm_node->tcp_cntxt.loc_seq_num) {
1592 nes_debug(NES_DBG_CM, "rem_ack_num != loc_seq_num\n");
1593 cleanup_retrans_entry(cm_node);
1594 send_reset(cm_node, skb);
1595 return;
1596 }
6492cdf3
FL		 1597 cm_node->state = NES_CM_STATE_ESTABLISHED;
1598 if (datasize) {
1599 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1600 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1601 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ);
1602 } else { /* rcvd ACK only */
1603 dev_kfree_skb_any(skb);
1604 cleanup_retrans_entry(cm_node);
1605 }
1606 break;
1607 case NES_CM_STATE_ESTABLISHED:
1608 /* Passive OPEN */
1609 /* We expect mpa frame to be received only */
1610 if (datasize) {
1611 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1612 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1613 handle_rcv_mpa(cm_node, skb,
1614 NES_CM_EVENT_MPA_REQ);
1615 } else
1616 drop_packet(skb);
1617 break;
1618 case NES_CM_STATE_MPAREQ_SENT:
1619 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1620 if (datasize) {
1621 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1622 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED);
1623 } else { /* Could be just an ack pkt.. */
1624 cleanup_retrans_entry(cm_node);
1625 dev_kfree_skb_any(skb);
3c2d774c 1626 }
6492cdf3 1627 break;
abb77256
FL		 1628 case NES_CM_STATE_LISTENING:
1629 case NES_CM_STATE_CLOSED:
1630 cleanup_retrans_entry(cm_node);
1631 send_reset(cm_node, skb);
1632 break;
6492cdf3
FL		 1633 case NES_CM_STATE_FIN_WAIT1:
1634 case NES_CM_STATE_SYN_SENT:
1635 case NES_CM_STATE_FIN_WAIT2:
1636 case NES_CM_STATE_TSA:
6492cdf3
FL		 1637 case NES_CM_STATE_MPAREQ_RCVD:
1638 case NES_CM_STATE_LAST_ACK:
1639 case NES_CM_STATE_CLOSING:
1640 case NES_CM_STATE_UNKNOWN:
1641 default:
1642 drop_packet(skb);
1643 break;
3c2d774c 1644 }
6492cdf3 1645}
3c2d774c 1646
3c2d774c
GS		 1647
1648
6492cdf3
FL		 1649static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1650 struct sk_buff *skb, int optionsize, int passive)
1651{
1652 u8 *optionsloc = (u8 *)&tcph[1];
3c2d774c 1653 if (optionsize) {
6492cdf3
FL		 1654 if (process_options(cm_node, optionsloc, optionsize,
1655 (u32)tcph->syn)) {
1656 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1657 __func__, cm_node);
1658 if (passive)
abb77256 1659 passive_open_err(cm_node, skb, 1);
6492cdf3 1660 else
abb77256 1661 active_open_err(cm_node, skb, 1);
6492cdf3 1662 return 1;
3c2d774c 1663 }
6492cdf3 1664 }
3c2d774c
GS		 1665
1666 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1667 cm_node->tcp_cntxt.snd_wscale;
1668
6492cdf3 1669 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
3c2d774c 1670 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
6492cdf3
FL		 1671 return 0;
1672}
3c2d774c 1673
6492cdf3
FL		 1674/*
1675 * active_open_err() will send reset() if flag set..
1676 * It will also send ABORT event.
1677 */
3c2d774c 1678
6492cdf3
FL		 1679static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1680 int reset)
1681{
1682 cleanup_retrans_entry(cm_node);
1683 if (reset) {
1684 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1685 "state=%d\n", cm_node, cm_node->state);
1686 add_ref_cm_node(cm_node);
1687 send_reset(cm_node, skb);
1688 } else
1689 dev_kfree_skb_any(skb);
3c2d774c 1690
6492cdf3
FL		 1691 cm_node->state = NES_CM_STATE_CLOSED;
1692 create_event(cm_node, NES_CM_EVENT_ABORTED);
1693}
3c2d774c 1694
6492cdf3
FL		 1695/*
1696 * passive_open_err() will either do a reset() or will free up the skb and
1697 * remove the cm_node.
1698 */
3c2d774c 1699
6492cdf3
FL		 1700static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1701 int reset)
1702{
1703 cleanup_retrans_entry(cm_node);
1704 cm_node->state = NES_CM_STATE_CLOSED;
1705 if (reset) {
1706 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1707 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1708 send_reset(cm_node, skb);
1709 } else {
1710 dev_kfree_skb_any(skb);
1711 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 1712 }
6492cdf3 1713}
3c2d774c 1714
6492cdf3
FL		 1715/*
1716 * free_retrans_entry() routines assumes that the retrans_list_lock has
1717 * been acquired before calling.
1718 */
1719static void free_retrans_entry(struct nes_cm_node *cm_node)
1720{
1721 struct nes_timer_entry *send_entry;
1722 send_entry = cm_node->send_entry;
1723 if (send_entry) {
1724 cm_node->send_entry = NULL;
1725 dev_kfree_skb_any(send_entry->skb);
1726 kfree(send_entry);
1727 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 1728 }
6492cdf3 1729}
3c2d774c 1730
6492cdf3
FL		 1731static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1732{
1733 unsigned long flags;
3c2d774c 1734
6492cdf3
FL		 1735 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1736 free_retrans_entry(cm_node);
1737 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
3c2d774c
GS		 1738}
1739
6492cdf3
FL		 1740/**
1741 * process_packet
1742 * Returns skb if to be freed, else it will return NULL if already used..
1743 */
1744static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1745 struct nes_cm_core *cm_core)
1746{
1747 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1748 struct tcphdr *tcph = tcp_hdr(skb);
1749 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1750
1751 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1752 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1753 tcph->ack, tcph->rst, tcph->fin);
1754
1755 if (tcph->rst)
1756 pkt_type = NES_PKT_TYPE_RST;
1757 else if (tcph->syn) {
1758 pkt_type = NES_PKT_TYPE_SYN;
1759 if (tcph->ack)
1760 pkt_type = NES_PKT_TYPE_SYNACK;
1761 } else if (tcph->fin)
1762 pkt_type = NES_PKT_TYPE_FIN;
1763 else if (tcph->ack)
1764 pkt_type = NES_PKT_TYPE_ACK;
1765
1766 switch (pkt_type) {
1767 case NES_PKT_TYPE_SYN:
1768 handle_syn_pkt(cm_node, skb, tcph);
1769 break;
1770 case NES_PKT_TYPE_SYNACK:
1771 handle_synack_pkt(cm_node, skb, tcph);
1772 break;
1773 case NES_PKT_TYPE_ACK:
1774 handle_ack_pkt(cm_node, skb, tcph);
1775 break;
1776 case NES_PKT_TYPE_RST:
1777 handle_rst_pkt(cm_node, skb, tcph);
1778 break;
1779 case NES_PKT_TYPE_FIN:
1780 handle_fin_pkt(cm_node, skb, tcph);
1781 break;
1782 default:
1783 drop_packet(skb);
1784 break;
1785 }
1786}
3c2d774c
GS		 1787
1788/**
1789 * mini_cm_listen - create a listen node with params
1790 */
1791static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
6492cdf3 1792 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
3c2d774c
GS		 1793{
1794 struct nes_cm_listener *listener;
1795 unsigned long flags;
1796
1797 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1798 cm_info->loc_addr, cm_info->loc_port);
1799
1800 /* cannot have multiple matching listeners */
1801 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1802 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1803 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1804 /* find automatically incs ref count ??? */
1805 atomic_dec(&listener->ref_count);
1806 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1807 return NULL;
1808 }
1809
1810 if (!listener) {
1811 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1812 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1813 if (!listener) {
1814 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1815 return NULL;
1816 }
1817
3c2d774c
GS		 1818 listener->loc_addr = htonl(cm_info->loc_addr);
1819 listener->loc_port = htons(cm_info->loc_port);
1820 listener->reused_node = 0;
1821
1822 atomic_set(&listener->ref_count, 1);
1823 }
1824 /* pasive case */
1825 /* find already inc'ed the ref count */
1826 else {
1827 listener->reused_node = 1;
1828 }
1829
1830 listener->cm_id = cm_info->cm_id;
1831 atomic_set(&listener->pend_accepts_cnt, 0);
1832 listener->cm_core = cm_core;
1833 listener->nesvnic = nesvnic;
1834 atomic_inc(&cm_core->node_cnt);
3c2d774c 1835
3c2d774c
GS		 1836 listener->conn_type = cm_info->conn_type;
1837 listener->backlog = cm_info->backlog;
1838 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1839
1840 if (!listener->reused_node) {
1841 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1842 list_add(&listener->list, &cm_core->listen_list.list);
1843 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1844 atomic_inc(&cm_core->listen_node_cnt);
1845 }
1846
1847 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1848 " listener = %p, backlog = %d, cm_id = %p.\n",
1849 cm_info->loc_addr, cm_info->loc_port,
1850 listener, listener->backlog, listener->cm_id);
1851
1852 return listener;
1853}
1854
1855
1856/**
1857 * mini_cm_connect - make a connection node with params
1858 */
54c86a8c 1859static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
6492cdf3
FL		 1860 struct nes_vnic *nesvnic, u16 private_data_len,
1861 void *private_data, struct nes_cm_info *cm_info)
3c2d774c
GS		 1862{
1863 int ret = 0;
1864 struct nes_cm_node *cm_node;
1865 struct nes_cm_listener *loopbackremotelistener;
1866 struct nes_cm_node *loopbackremotenode;
1867 struct nes_cm_info loopback_cm_info;
6492cdf3
FL		 1868 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
1869 struct ietf_mpa_frame *mpa_frame = NULL;
3c2d774c
GS		 1870
1871 /* create a CM connection node */
1872 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1873 if (!cm_node)
1874 return NULL;
6492cdf3
FL		 1875 mpa_frame = &cm_node->mpa_frame;
1876 strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ);
1877 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
1878 mpa_frame->rev = IETF_MPA_VERSION;
1879 mpa_frame->priv_data_len = htons(private_data_len);
3c2d774c 1880
7495ab68 1881 /* set our node side to client (active) side */
3c2d774c
GS		 1882 cm_node->tcp_cntxt.client = 1;
1883 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1884
1885 if (cm_info->loc_addr == cm_info->rem_addr) {
6492cdf3
FL		 1886 loopbackremotelistener = find_listener(cm_core,
1887 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
1888 NES_CM_LISTENER_ACTIVE_STATE);
3c2d774c
GS		 1889 if (loopbackremotelistener == NULL) {
1890 create_event(cm_node, NES_CM_EVENT_ABORTED);
1891 } else {
1892 atomic_inc(&cm_loopbacks);
1893 loopback_cm_info = *cm_info;
1894 loopback_cm_info.loc_port = cm_info->rem_port;
1895 loopback_cm_info.rem_port = cm_info->loc_port;
1896 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
6492cdf3
FL		 1897 loopbackremotenode = make_cm_node(cm_core, nesvnic,
1898 &loopback_cm_info, loopbackremotelistener);
3c2d774c 1899 loopbackremotenode->loopbackpartner = cm_node;
6492cdf3
FL		 1900 loopbackremotenode->tcp_cntxt.rcv_wscale =
1901 NES_CM_DEFAULT_RCV_WND_SCALE;
3c2d774c 1902 cm_node->loopbackpartner = loopbackremotenode;
6492cdf3
FL		 1903 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
1904 private_data_len);
1905 loopbackremotenode->mpa_frame_size = private_data_len;
3c2d774c 1906
6492cdf3
FL		 1907 /* we are done handling this state. */
1908 /* set node to a TSA state */
3c2d774c 1909 cm_node->state = NES_CM_STATE_TSA;
6492cdf3
FL		 1910 cm_node->tcp_cntxt.rcv_nxt =
1911 loopbackremotenode->tcp_cntxt.loc_seq_num;
1912 loopbackremotenode->tcp_cntxt.rcv_nxt =
1913 cm_node->tcp_cntxt.loc_seq_num;
1914 cm_node->tcp_cntxt.max_snd_wnd =
1915 loopbackremotenode->tcp_cntxt.rcv_wnd;
1916 loopbackremotenode->tcp_cntxt.max_snd_wnd =
1917 cm_node->tcp_cntxt.rcv_wnd;
1918 cm_node->tcp_cntxt.snd_wnd =
1919 loopbackremotenode->tcp_cntxt.rcv_wnd;
1920 loopbackremotenode->tcp_cntxt.snd_wnd =
1921 cm_node->tcp_cntxt.rcv_wnd;
1922 cm_node->tcp_cntxt.snd_wscale =
1923 loopbackremotenode->tcp_cntxt.rcv_wscale;
1924 loopbackremotenode->tcp_cntxt.snd_wscale =
1925 cm_node->tcp_cntxt.rcv_wscale;
3c2d774c
GS		 1926
1927 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1928 }
1929 return cm_node;
1930 }
1931
1932 /* set our node side to client (active) side */
1933 cm_node->tcp_cntxt.client = 1;
1934 /* init our MPA frame ptr */
6492cdf3
FL		 1935 memcpy(mpa_frame->priv_data, private_data, private_data_len);
1936
3c2d774c
GS		 1937 cm_node->mpa_frame_size = mpa_frame_size;
1938
1939 /* send a syn and goto syn sent state */
1940 cm_node->state = NES_CM_STATE_SYN_SENT;
6492cdf3
FL		 1941 ret = send_syn(cm_node, 0, NULL);
1942
1943 if (ret) {
1944 /* error in sending the syn free up the cm_node struct */
1945 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
1946 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
1947 cm_node->rem_addr, cm_node->rem_port, cm_node,
1948 cm_node->cm_id);
1949 rem_ref_cm_node(cm_node->cm_core, cm_node);
1950 cm_node = NULL;
1951 }
3c2d774c 1952
6492cdf3
FL		 1953 if (cm_node)
1954 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
1955 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
1956 cm_node->rem_addr, cm_node->rem_port, cm_node,
1957 cm_node->cm_id);
3c2d774c
GS		 1958
1959 return cm_node;
1960}
1961
1962
1963/**
1964 * mini_cm_accept - accept a connection
1965 * This function is never called
1966 */
6492cdf3
FL		 1967static int mini_cm_accept(struct nes_cm_core *cm_core,
1968 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
3c2d774c
GS		 1969{
1970 return 0;
1971}
1972
1973
1974/**
1975 * mini_cm_reject - reject and teardown a connection
1976 */
1a855fbf 1977static int mini_cm_reject(struct nes_cm_core *cm_core,
6492cdf3 1978 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
3c2d774c
GS		 1979{
1980 int ret = 0;
183ecfa3 1981 int passive_state;
3c2d774c 1982
6492cdf3
FL		 1983 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
1984 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
3c2d774c 1985
6492cdf3
FL		 1986 if (cm_node->tcp_cntxt.client)
1987 return ret;
1988 cleanup_retrans_entry(cm_node);
3c2d774c 1989
183ecfa3
FL		 1990 passive_state = atomic_add_return(1, &cm_node->passive_state);
1991 cm_node->state = NES_CM_STATE_CLOSED;
1992 if (passive_state == NES_SEND_RESET_EVENT)
1993 rem_ref_cm_node(cm_core, cm_node);
1994 else
1995 ret = send_reset(cm_node, NULL);
3c2d774c
GS		 1996 return ret;
1997}
1998
1999
2000/**
2001 * mini_cm_close
2002 */
1a855fbf 2003static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2004{
2005 int ret = 0;
2006
2007 if (!cm_core || !cm_node)
2008 return -EINVAL;
2009
2010 switch (cm_node->state) {
6492cdf3
FL		 2011 case NES_CM_STATE_SYN_RCVD:
2012 case NES_CM_STATE_SYN_SENT:
2013 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2014 case NES_CM_STATE_ESTABLISHED:
2015 case NES_CM_STATE_ACCEPTING:
2016 case NES_CM_STATE_MPAREQ_SENT:
2017 case NES_CM_STATE_MPAREQ_RCVD:
2018 cleanup_retrans_entry(cm_node);
2019 send_reset(cm_node, NULL);
2020 break;
2021 case NES_CM_STATE_CLOSE_WAIT:
2022 cm_node->state = NES_CM_STATE_LAST_ACK;
2023 send_fin(cm_node, NULL);
2024 break;
2025 case NES_CM_STATE_FIN_WAIT1:
2026 case NES_CM_STATE_FIN_WAIT2:
2027 case NES_CM_STATE_LAST_ACK:
2028 case NES_CM_STATE_TIME_WAIT:
2029 case NES_CM_STATE_CLOSING:
2030 ret = -1;
2031 break;
2032 case NES_CM_STATE_LISTENING:
2033 case NES_CM_STATE_UNKNOWN:
2034 case NES_CM_STATE_INITED:
2035 case NES_CM_STATE_CLOSED:
2036 ret = rem_ref_cm_node(cm_core, cm_node);
2037 break;
2038 case NES_CM_STATE_TSA:
2039 if (cm_node->send_entry)
2040 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2041 "send_entry=%p\n", cm_node->send_entry);
2042 ret = rem_ref_cm_node(cm_core, cm_node);
2043 break;
3c2d774c 2044 }
3c2d774c
GS		 2045 return ret;
2046}
2047
2048
2049/**
2050 * recv_pkt - recv an ETHERNET packet, and process it through CM
2051 * node state machine
2052 */
4a14f6a7 2053static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
6492cdf3 2054 struct nes_vnic *nesvnic, struct sk_buff *skb)
3c2d774c
GS		 2055{
2056 struct nes_cm_node *cm_node = NULL;
2057 struct nes_cm_listener *listener = NULL;
2058 struct iphdr *iph;
2059 struct tcphdr *tcph;
2060 struct nes_cm_info nfo;
4a14f6a7 2061 int skb_handled = 1;
3c2d774c 2062
6492cdf3 2063 if (!skb)
4a14f6a7 2064 return 0;
6492cdf3 2065 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
4a14f6a7 2066 return 0;
3c2d774c
GS		 2067 }
2068
2069 iph = (struct iphdr *)skb->data;
2070 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
3c2d774c
GS		 2071
2072 nfo.loc_addr = ntohl(iph->daddr);
2073 nfo.loc_port = ntohs(tcph->dest);
2074 nfo.rem_addr = ntohl(iph->saddr);
2075 nfo.rem_port = ntohs(tcph->source);
2076
63779436
HH		 2077 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2078 &iph->daddr, tcph->dest, &iph->saddr, tcph->source);
3c2d774c 2079
6492cdf3
FL		 2080 do {
2081 cm_node = find_node(cm_core,
3c2d774c
GS		 2082 nfo.rem_port, nfo.rem_addr,
2083 nfo.loc_port, nfo.loc_addr);
2084
3c2d774c 2085 if (!cm_node) {
6492cdf3
FL		 2086 /* Only type of packet accepted are for */
2087 /* the PASSIVE open (syn only) */
2088 if ((!tcph->syn) || (tcph->ack)) {
4a14f6a7 2089 skb_handled = 0;
6492cdf3
FL		 2090 break;
2091 }
2092 listener = find_listener(cm_core, nfo.loc_addr,
2093 nfo.loc_port,
2094 NES_CM_LISTENER_ACTIVE_STATE);
4a14f6a7
FL		 2095 if (!listener) {
2096 nfo.cm_id = NULL;
2097 nfo.conn_type = 0;
2098 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2099 skb_handled = 0;
6492cdf3
FL		 2100 break;
2101 }
4a14f6a7
FL		 2102 nfo.cm_id = listener->cm_id;
2103 nfo.conn_type = listener->conn_type;
6492cdf3
FL		 2104 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2105 listener);
2106 if (!cm_node) {
2107 nes_debug(NES_DBG_CM, "Unable to allocate "
2108 "node\n");
2109 cm_packets_dropped++;
3c2d774c 2110 atomic_dec(&listener->ref_count);
6492cdf3
FL		 2111 dev_kfree_skb_any(skb);
2112 break;
3c2d774c 2113 }
6492cdf3
FL		 2114 if (!tcph->rst && !tcph->fin) {
2115 cm_node->state = NES_CM_STATE_LISTENING;
2116 } else {
2117 cm_packets_dropped++;
2118 rem_ref_cm_node(cm_core, cm_node);
2119 dev_kfree_skb_any(skb);
2120 break;
3c2d774c 2121 }
6492cdf3
FL		 2122 add_ref_cm_node(cm_node);
2123 } else if (cm_node->state == NES_CM_STATE_TSA) {
3c2d774c 2124 rem_ref_cm_node(cm_core, cm_node);
6492cdf3
FL		 2125 atomic_inc(&cm_accel_dropped_pkts);
2126 dev_kfree_skb_any(skb);
2127 break;
3c2d774c 2128 }
4a14f6a7
FL		 2129 skb_reset_network_header(skb);
2130 skb_set_transport_header(skb, sizeof(*tcph));
2131 skb->len = ntohs(iph->tot_len);
6492cdf3
FL		 2132 process_packet(cm_node, skb, cm_core);
2133 rem_ref_cm_node(cm_core, cm_node);
2134 } while (0);
4a14f6a7 2135 return skb_handled;
3c2d774c
GS		 2136}
2137
2138
2139/**
2140 * nes_cm_alloc_core - allocate a top level instance of a cm core
2141 */
1a855fbf 2142static struct nes_cm_core *nes_cm_alloc_core(void)
3c2d774c 2143{
3c2d774c 2144 struct nes_cm_core *cm_core;
3c2d774c
GS		 2145
2146 /* setup the CM core */
2147 /* alloc top level core control structure */
2148 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2149 if (!cm_core)
2150 return NULL;
2151
2152 INIT_LIST_HEAD(&cm_core->connected_nodes);
2153 init_timer(&cm_core->tcp_timer);
2154 cm_core->tcp_timer.function = nes_cm_timer_tick;
2155
2156 cm_core->mtu = NES_CM_DEFAULT_MTU;
2157 cm_core->state = NES_CM_STATE_INITED;
2158 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2159
3c2d774c
GS		 2160 atomic_set(&cm_core->events_posted, 0);
2161
3c2d774c
GS		 2162 cm_core->api = &nes_cm_api;
2163
2164 spin_lock_init(&cm_core->ht_lock);
2165 spin_lock_init(&cm_core->listen_list_lock);
2166
2167 INIT_LIST_HEAD(&cm_core->listen_list.list);
2168
2169 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2170
2171 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2172 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2173 cm_core->post_event = nes_cm_post_event;
2174 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2175 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2176
2177 print_core(cm_core);
2178 return cm_core;
2179}
2180
2181
2182/**
2183 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2184 */
1a855fbf 2185static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
3c2d774c
GS		 2186{
2187 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2188
2189 if (!cm_core)
2190 return -EINVAL;
2191
2192 barrier();
2193
2194 if (timer_pending(&cm_core->tcp_timer)) {
2195 del_timer(&cm_core->tcp_timer);
2196 }
2197
2198 destroy_workqueue(cm_core->event_wq);
2199 destroy_workqueue(cm_core->disconn_wq);
2200 nes_debug(NES_DBG_CM, "\n");
2201 kfree(cm_core);
2202
2203 return 0;
2204}
2205
2206
2207/**
2208 * mini_cm_get
2209 */
1a855fbf 2210static int mini_cm_get(struct nes_cm_core *cm_core)
3c2d774c
GS		 2211{
2212 return cm_core->state;
2213}
2214
2215
2216/**
2217 * mini_cm_set
2218 */
1a855fbf 2219static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
3c2d774c
GS		 2220{
2221 int ret = 0;
2222
2223 switch (type) {
2224 case NES_CM_SET_PKT_SIZE:
2225 cm_core->mtu = value;
2226 break;
2227 case NES_CM_SET_FREE_PKT_Q_SIZE:
2228 cm_core->free_tx_pkt_max = value;
2229 break;
2230 default:
2231 /* unknown set option */
2232 ret = -EINVAL;
2233 }
2234
2235 return ret;
2236}
2237
2238
2239/**
2240 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2241 * successfully exchanged when this is called
2242 */
2243static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2244{
2245 int ret = 0;
2246
2247 if (!nesqp)
2248 return -EINVAL;
2249
2250 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2251 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2252 NES_QPCONTEXT_MISC_DROS);
2253
2254 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2255 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2256
2257 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2258
2259 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2260
2261 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2262 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2263
2264 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2265 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2266 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2267
2268 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2269 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2270 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2271
2272 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2273 nesqp->nesqp_context->ts_recent = 0;
2274 nesqp->nesqp_context->ts_age = 0;
2275 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2276 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2277 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2278 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2279 cm_node->tcp_cntxt.rcv_wscale);
2280 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2281 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2282 nesqp->nesqp_context->srtt = 0;
2283 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2284 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2285 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2286 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2287 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2288 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2289
2290 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2291 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2292 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2293 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2294 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2295 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2296 le32_to_cpu(nesqp->nesqp_context->misc));
2297 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2298 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2299 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2300
2301 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2302 cm_node->state = NES_CM_STATE_TSA;
2303
2304 return ret;
2305}
2306
2307
2308/**
2309 * nes_cm_disconn
2310 */
2311int nes_cm_disconn(struct nes_qp *nesqp)
2312{
2313 unsigned long flags;
2314
2315 spin_lock_irqsave(&nesqp->lock, flags);
2316 if (nesqp->disconn_pending == 0) {
2317 nesqp->disconn_pending++;
2318 spin_unlock_irqrestore(&nesqp->lock, flags);
3c2d774c
GS		 2319 /* init our disconnect work element, to */
2320 INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
2321
2322 queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
6492cdf3 2323 } else
3c2d774c 2324 spin_unlock_irqrestore(&nesqp->lock, flags);
3c2d774c
GS		 2325
2326 return 0;
2327}
2328
2329
2330/**
2331 * nes_disconnect_worker
2332 */
1a855fbf 2333static void nes_disconnect_worker(struct work_struct *work)
3c2d774c
GS		 2334{
2335 struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
2336
2337 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2338 nesqp->last_aeq, nesqp->hwqp.qp_id);
2339 nes_cm_disconn_true(nesqp);
2340}
2341
2342
2343/**
2344 * nes_cm_disconn_true
2345 */
1a855fbf 2346static int nes_cm_disconn_true(struct nes_qp *nesqp)
3c2d774c
GS		 2347{
2348 unsigned long flags;
2349 int ret = 0;
2350 struct iw_cm_id *cm_id;
2351 struct iw_cm_event cm_event;
2352 struct nes_vnic *nesvnic;
2353 u16 last_ae;
2354 u8 original_hw_tcp_state;
2355 u8 original_ibqp_state;
2356 u8 issued_disconnect_reset = 0;
2357
2358 if (!nesqp) {
2359 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2360 return -1;
2361 }
2362
2363 spin_lock_irqsave(&nesqp->lock, flags);
2364 cm_id = nesqp->cm_id;
2365 /* make sure we havent already closed this connection */
2366 if (!cm_id) {
2367 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2368 nesqp->hwqp.qp_id);
2369 spin_unlock_irqrestore(&nesqp->lock, flags);
3c2d774c
GS		 2370 return -1;
2371 }
2372
2373 nesvnic = to_nesvnic(nesqp->ibqp.device);
2374 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2375
2376 original_hw_tcp_state = nesqp->hw_tcp_state;
2377 original_ibqp_state = nesqp->ibqp_state;
2378 last_ae = nesqp->last_aeq;
2379
2380
2381 nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
2382
2383 if ((nesqp->cm_id) && (cm_id->event_handler)) {
2384 if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2385 ((original_ibqp_state == IB_QPS_RTS) &&
2386 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2387 atomic_inc(&cm_disconnects);
2388 cm_event.event = IW_CM_EVENT_DISCONNECT;
2389 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
3c2d774c 2390 cm_event.status = IW_CM_EVENT_STATUS_RESET;
6492cdf3
FL		 2391 nes_debug(NES_DBG_CM, "Generating a CM "
2392 "Disconnect Event (status reset) for "
2393 "QP%u, cm_id = %p. \n",
2394 nesqp->hwqp.qp_id, cm_id);
2395 } else
3c2d774c 2396 cm_event.status = IW_CM_EVENT_STATUS_OK;
3c2d774c
GS		 2397
2398 cm_event.local_addr = cm_id->local_addr;
2399 cm_event.remote_addr = cm_id->remote_addr;
2400 cm_event.private_data = NULL;
2401 cm_event.private_data_len = 0;
2402
6492cdf3
FL		 2403 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2404 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2405 "cm_id = %p, refcount = %u.\n",
2406 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2407 nesqp->hwqp.sq_tail, cm_id,
2408 atomic_read(&nesqp->refcount));
3c2d774c
GS		 2409
2410 spin_unlock_irqrestore(&nesqp->lock, flags);
2411 ret = cm_id->event_handler(cm_id, &cm_event);
2412 if (ret)
6492cdf3
FL		 2413 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2414 "returned, ret=%d\n", ret);
3c2d774c
GS		 2415 spin_lock_irqsave(&nesqp->lock, flags);
2416 }
2417
2418 nesqp->disconn_pending = 0;
2419 /* There might have been another AE while the lock was released */
2420 original_hw_tcp_state = nesqp->hw_tcp_state;
2421 original_ibqp_state = nesqp->ibqp_state;
2422 last_ae = nesqp->last_aeq;
2423
2424 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2425 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2426 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2427 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2428 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2429 atomic_inc(&cm_closes);
2430 nesqp->cm_id = NULL;
2431 nesqp->in_disconnect = 0;
2432 spin_unlock_irqrestore(&nesqp->lock, flags);
2433 nes_disconnect(nesqp, 1);
2434
2435 cm_id->provider_data = nesqp;
2436 /* Send up the close complete event */
2437 cm_event.event = IW_CM_EVENT_CLOSE;
2438 cm_event.status = IW_CM_EVENT_STATUS_OK;
2439 cm_event.provider_data = cm_id->provider_data;
2440 cm_event.local_addr = cm_id->local_addr;
2441 cm_event.remote_addr = cm_id->remote_addr;
2442 cm_event.private_data = NULL;
2443 cm_event.private_data_len = 0;
2444
2445 ret = cm_id->event_handler(cm_id, &cm_event);
2446 if (ret) {
2447 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2448 }
2449
2450 cm_id->rem_ref(cm_id);
2451
2452 spin_lock_irqsave(&nesqp->lock, flags);
2453 if (nesqp->flush_issued == 0) {
2454 nesqp->flush_issued = 1;
2455 spin_unlock_irqrestore(&nesqp->lock, flags);
6492cdf3
FL		 2456 flush_wqes(nesvnic->nesdev, nesqp,
2457 NES_CQP_FLUSH_RQ, 1);
2458 } else
3c2d774c 2459 spin_unlock_irqrestore(&nesqp->lock, flags);
3c2d774c
GS		 2460 } else {
2461 cm_id = nesqp->cm_id;
2462 spin_unlock_irqrestore(&nesqp->lock, flags);
2463 /* check to see if the inbound reset beat the outbound reset */
2464 if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
6492cdf3
FL		 2465 nes_debug(NES_DBG_CM, "QP%u: Decing refcount "
2466 "due to inbound reset beating the "
2467 "outbound reset.\n", nesqp->hwqp.qp_id);
3c2d774c
GS		 2468 }
2469 }
2470 } else {
2471 nesqp->disconn_pending = 0;
2472 spin_unlock_irqrestore(&nesqp->lock, flags);
2473 }
3c2d774c
GS		 2474
2475 return 0;
2476}
2477
2478
2479/**
2480 * nes_disconnect
2481 */
1a855fbf 2482static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3c2d774c
GS		 2483{
2484 int ret = 0;
2485 struct nes_vnic *nesvnic;
2486 struct nes_device *nesdev;
2487
2488 nesvnic = to_nesvnic(nesqp->ibqp.device);
2489 if (!nesvnic)
2490 return -EINVAL;
2491
2492 nesdev = nesvnic->nesdev;
2493
2494 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2495 atomic_read(&nesvnic->netdev->refcnt));
2496
2497 if (nesqp->active_conn) {
2498
2499 /* indicate this connection is NOT active */
2500 nesqp->active_conn = 0;
2501 } else {
2502 /* Need to free the Last Streaming Mode Message */
2503 if (nesqp->ietf_frame) {
2504 pci_free_consistent(nesdev->pcidev,
2505 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2506 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2507 }
2508 }
2509
2510 /* close the CM node down if it is still active */
2511 if (nesqp->cm_node) {
2512 nes_debug(NES_DBG_CM, "Call close API\n");
2513
2514 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3c2d774c
GS		 2515 }
2516
2517 return ret;
2518}
2519
2520
2521/**
2522 * nes_accept
2523 */
2524int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2525{
2526 u64 u64temp;
2527 struct ib_qp *ibqp;
2528 struct nes_qp *nesqp;
2529 struct nes_vnic *nesvnic;
2530 struct nes_device *nesdev;
2531 struct nes_cm_node *cm_node;
2532 struct nes_adapter *adapter;
2533 struct ib_qp_attr attr;
2534 struct iw_cm_event cm_event;
2535 struct nes_hw_qp_wqe *wqe;
2536 struct nes_v4_quad nes_quad;
30da7cff 2537 u32 crc_value;
3c2d774c 2538 int ret;
183ecfa3 2539 int passive_state;
3c2d774c
GS		 2540
2541 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2542 if (!ibqp)
2543 return -EINVAL;
2544
2545 /* get all our handles */
2546 nesqp = to_nesqp(ibqp);
2547 nesvnic = to_nesvnic(nesqp->ibqp.device);
2548 nesdev = nesvnic->nesdev;
2549 adapter = nesdev->nesadapter;
2550
3c2d774c 2551 cm_node = (struct nes_cm_node *)cm_id->provider_data;
6492cdf3
FL		 2552 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2553 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2554 nesvnic->netdev->name);
3c2d774c
GS		 2555
2556 /* associate the node with the QP */
2557 nesqp->cm_node = (void *)cm_node;
6492cdf3
FL		 2558 cm_node->nesqp = nesqp;
2559 nes_add_ref(&nesqp->ibqp);
3c2d774c 2560
6492cdf3
FL		 2561 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2562 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3c2d774c
GS		 2563 atomic_inc(&cm_accepts);
2564
2565 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2566 atomic_read(&nesvnic->netdev->refcnt));
2567
6492cdf3
FL		 2568 /* allocate the ietf frame and space for private data */
2569 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2570 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2571 &nesqp->ietf_frame_pbase);
3c2d774c 2572
6492cdf3
FL		 2573 if (!nesqp->ietf_frame) {
2574 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2575 "data\n");
2576 return -ENOMEM;
2577 }
3c2d774c 2578
3c2d774c 2579
6492cdf3
FL		 2580 /* setup the MPA frame */
2581 nesqp->private_data_len = conn_param->private_data_len;
2582 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
3c2d774c 2583
6492cdf3
FL		 2584 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2585 conn_param->private_data_len);
3c2d774c 2586
6492cdf3
FL		 2587 nesqp->ietf_frame->priv_data_len =
2588 cpu_to_be16(conn_param->private_data_len);
2589 nesqp->ietf_frame->rev = mpa_version;
2590 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
3c2d774c 2591
6492cdf3
FL		 2592 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2593 wqe = &nesqp->hwqp.sq_vbase[0];
2594
2595 if (cm_id->remote_addr.sin_addr.s_addr !=
2596 cm_id->local_addr.sin_addr.s_addr) {
2597 u64temp = (unsigned long)nesqp;
2598 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2599 set_wqe_64bit_value(wqe->wqe_words,
2600 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2601 u64temp);
2602 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2603 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2604 NES_IWARP_SQ_WQE_WRPDU);
2605 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2606 cpu_to_le32(conn_param->private_data_len +
2607 sizeof(struct ietf_mpa_frame));
2608 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
2609 cpu_to_le32((u32)nesqp->ietf_frame_pbase);
2610 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
2611 cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
2612 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2613 cpu_to_le32(conn_param->private_data_len +
2614 sizeof(struct ietf_mpa_frame));
2615 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2616
2617 nesqp->nesqp_context->ird_ord_sizes |=
2618 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2619 NES_QPCONTEXT_ORDIRD_WRPDU);
2620 } else {
2621 nesqp->nesqp_context->ird_ord_sizes |=
2622 cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2623 NES_QPCONTEXT_ORDIRD_WRPDU |
2624 NES_QPCONTEXT_ORDIRD_ALSMM));
2625 }
2626 nesqp->skip_lsmm = 1;
3c2d774c
GS		 2627
2628
2629 /* Cache the cm_id in the qp */
2630 nesqp->cm_id = cm_id;
2631 cm_node->cm_id = cm_id;
2632
2633 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2634 cm_id->provider_data = nesqp;
2635 nesqp->active_conn = 0;
2636
6492cdf3
FL		 2637 if (cm_node->state == NES_CM_STATE_TSA)
2638 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2639 cm_node);
2640
3c2d774c
GS		 2641 nes_cm_init_tsa_conn(nesqp, cm_node);
2642
6492cdf3
FL		 2643 nesqp->nesqp_context->tcpPorts[0] =
2644 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2645 nesqp->nesqp_context->tcpPorts[1] =
2646 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2647
2648 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2649 nesqp->nesqp_context->ip0 =
2650 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2651 else
2652 nesqp->nesqp_context->ip0 =
2653 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3c2d774c
GS		 2654
2655 nesqp->nesqp_context->misc2 |= cpu_to_le32(
6492cdf3
FL		 2656 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2657 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 2658
6492cdf3
FL		 2659 nesqp->nesqp_context->arp_index_vlan |=
2660 cpu_to_le32(nes_arp_table(nesdev,
2661 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3c2d774c
GS		 2662 NES_ARP_RESOLVE) << 16);
2663
2664 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
6492cdf3 2665 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3c2d774c
GS		 2666
2667 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2668
2669 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
6492cdf3
FL		 2670 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2671 nesqp->nesqp_context->ird_ord_sizes |=
2672 cpu_to_le32((u32)conn_param->ord);
3c2d774c
GS		 2673
2674 memset(&nes_quad, 0, sizeof(nes_quad));
6492cdf3
FL		 2675 nes_quad.DstIpAdrIndex =
2676 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2677 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2678 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2679 else
2680 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2681 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2682 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3c2d774c
GS		 2683
2684 /* Produce hash key */
30da7cff
FL		 2685 crc_value = get_crc_value(&nes_quad);
2686 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c 2687 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
6492cdf3 2688 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3c2d774c
GS		 2689
2690 nesqp->hte_index &= adapter->hte_index_mask;
2691 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2692
2693 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2694
6492cdf3
FL		 2695 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2696 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2697 "private data length=%zu.\n", nesqp->hwqp.qp_id,
3c2d774c
GS		 2698 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2699 ntohs(cm_id->remote_addr.sin_port),
2700 ntohl(cm_id->local_addr.sin_addr.s_addr),
2701 ntohs(cm_id->local_addr.sin_port),
2702 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2703 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
6492cdf3
FL		 2704 conn_param->private_data_len +
2705 sizeof(struct ietf_mpa_frame));
3c2d774c 2706
3c2d774c
GS		 2707
2708 /* notify OF layer that accept event was successfull */
2709 cm_id->add_ref(cm_id);
2710
2711 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2712 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2713 cm_event.provider_data = (void *)nesqp;
2714 cm_event.local_addr = cm_id->local_addr;
2715 cm_event.remote_addr = cm_id->remote_addr;
2716 cm_event.private_data = NULL;
2717 cm_event.private_data_len = 0;
2718 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 2719 attr.qp_state = IB_QPS_RTS;
2720 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 2721 if (cm_node->loopbackpartner) {
6492cdf3
FL		 2722 cm_node->loopbackpartner->mpa_frame_size =
2723 nesqp->private_data_len;
3c2d774c 2724 /* copy entire MPA frame to our cm_node's frame */
6492cdf3
FL		 2725 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2726 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
3c2d774c
GS		 2727 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2728 }
2729 if (ret)
6492cdf3
FL		 2730 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2731 "ret=%d\n", __func__, __LINE__, ret);
3c2d774c 2732
183ecfa3
FL		 2733 passive_state = atomic_add_return(1, &cm_node->passive_state);
2734 if (passive_state == NES_SEND_RESET_EVENT)
2735 create_event(cm_node, NES_CM_EVENT_RESET);
3c2d774c
GS		 2736 return 0;
2737}
2738
2739
2740/**
2741 * nes_reject
2742 */
2743int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2744{
2745 struct nes_cm_node *cm_node;
2746 struct nes_cm_core *cm_core;
2747
2748 atomic_inc(&cm_rejects);
2749 cm_node = (struct nes_cm_node *) cm_id->provider_data;
2750 cm_core = cm_node->cm_core;
2751 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2752
2753 strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
2754 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2755
2756 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2757 cm_node->mpa_frame.rev = mpa_version;
2758 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2759
2760 cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2761
2762 return 0;
2763}
2764
2765
2766/**
2767 * nes_connect
2768 * setup and launch cm connect node
2769 */
2770int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2771{
2772 struct ib_qp *ibqp;
2773 struct nes_qp *nesqp;
2774 struct nes_vnic *nesvnic;
2775 struct nes_device *nesdev;
2776 struct nes_cm_node *cm_node;
2777 struct nes_cm_info cm_info;
2778
2779 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2780 if (!ibqp)
2781 return -EINVAL;
2782 nesqp = to_nesqp(ibqp);
2783 if (!nesqp)
2784 return -EINVAL;
2785 nesvnic = to_nesvnic(nesqp->ibqp.device);
2786 if (!nesvnic)
2787 return -EINVAL;
2788 nesdev = nesvnic->nesdev;
2789 if (!nesdev)
2790 return -EINVAL;
2791
6492cdf3
FL		 2792 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
2793 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
2794 ntohl(nesvnic->local_ipaddr),
2795 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2796 ntohs(cm_id->remote_addr.sin_port),
2797 ntohl(cm_id->local_addr.sin_addr.s_addr),
2798 ntohs(cm_id->local_addr.sin_port));
3c2d774c 2799
6492cdf3 2800 atomic_inc(&cm_connects);
3c2d774c
GS		 2801 nesqp->active_conn = 1;
2802
3c2d774c
GS		 2803 /* cache the cm_id in the qp */
2804 nesqp->cm_id = cm_id;
2805
2806 cm_id->provider_data = nesqp;
2807
3c2d774c
GS		 2808 nesqp->private_data_len = conn_param->private_data_len;
2809 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2810 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
6492cdf3
FL		 2811 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
2812 conn_param->private_data_len);
3c2d774c 2813
6492cdf3
FL		 2814 if (cm_id->local_addr.sin_addr.s_addr !=
2815 cm_id->remote_addr.sin_addr.s_addr)
3c2d774c 2816 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
6492cdf3 2817 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3c2d774c
GS		 2818
2819 /* set up the connection params for the node */
6492cdf3
FL		 2820 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
2821 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
2822 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
2823 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3c2d774c
GS		 2824 cm_info.cm_id = cm_id;
2825 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2826
2827 cm_id->add_ref(cm_id);
3c2d774c
GS		 2828
2829 /* create a connect CM node connection */
6492cdf3
FL		 2830 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
2831 conn_param->private_data_len, (void *)conn_param->private_data,
2832 &cm_info);
3c2d774c 2833 if (!cm_node) {
6492cdf3
FL		 2834 if (cm_id->local_addr.sin_addr.s_addr !=
2835 cm_id->remote_addr.sin_addr.s_addr)
3c2d774c 2836 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
6492cdf3
FL		 2837 PCI_FUNC(nesdev->pcidev->devfn),
2838 NES_MANAGE_APBVT_DEL);
2839
3c2d774c
GS		 2840 cm_id->rem_ref(cm_id);
2841 return -ENOMEM;
2842 }
2843
2844 cm_node->apbvt_set = 1;
2845 nesqp->cm_node = cm_node;
6492cdf3 2846 cm_node->nesqp = nesqp;
d7ffd507 2847 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 2848
2849 return 0;
2850}
2851
2852
2853/**
2854 * nes_create_listen
2855 */
2856int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
2857{
2858 struct nes_vnic *nesvnic;
2859 struct nes_cm_listener *cm_node;
2860 struct nes_cm_info cm_info;
2861 struct nes_adapter *adapter;
2862 int err;
2863
2864
2865 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
2866 cm_id, ntohs(cm_id->local_addr.sin_port));
2867
2868 nesvnic = to_nesvnic(cm_id->device);
2869 if (!nesvnic)
2870 return -EINVAL;
2871 adapter = nesvnic->nesdev->nesadapter;
2872 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2873 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2874
2875 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
2876 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
2877
2878 /* setup listen params in our api call struct */
2879 cm_info.loc_addr = nesvnic->local_ipaddr;
2880 cm_info.loc_port = cm_id->local_addr.sin_port;
2881 cm_info.backlog = backlog;
2882 cm_info.cm_id = cm_id;
2883
2884 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2885
2886
2887 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
2888 if (!cm_node) {
6492cdf3 2889 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
33718363 2890 __func__, __LINE__);
3c2d774c
GS		 2891 return -ENOMEM;
2892 }
2893
2894 cm_id->provider_data = cm_node;
2895
2896 if (!cm_node->reused_node) {
6492cdf3
FL		 2897 err = nes_manage_apbvt(nesvnic,
2898 ntohs(cm_id->local_addr.sin_port),
2899 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
2900 NES_MANAGE_APBVT_ADD);
3c2d774c 2901 if (err) {
6492cdf3
FL		 2902 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
2903 err);
3c2d774c
GS		 2904 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
2905 return err;
2906 }
2907 cm_listens_created++;
2908 }
2909
2910 cm_id->add_ref(cm_id);
2911 cm_id->provider_data = (void *)cm_node;
2912
2913
2914 return 0;
2915}
2916
2917
2918/**
2919 * nes_destroy_listen
2920 */
2921int nes_destroy_listen(struct iw_cm_id *cm_id)
2922{
2923 if (cm_id->provider_data)
2924 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
2925 else
2926 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
2927
2928 cm_id->rem_ref(cm_id);
2929
2930 return 0;
2931}
2932
2933
2934/**
2935 * nes_cm_recv
2936 */
2937int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
2938{
4a14f6a7 2939 int rc = 0;
3c2d774c
GS		 2940 cm_packets_received++;
2941 if ((g_cm_core) && (g_cm_core->api)) {
4a14f6a7 2942 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3c2d774c
GS		 2943 } else {
2944 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
2945 " cm is not setup properly.\n");
2946 }
2947
4a14f6a7 2948 return rc;
3c2d774c
GS		 2949}
2950
2951
2952/**
2953 * nes_cm_start
2954 * Start and init a cm core module
2955 */
2956int nes_cm_start(void)
2957{
2958 nes_debug(NES_DBG_CM, "\n");
2959 /* create the primary CM core, pass this handle to subsequent core inits */
2960 g_cm_core = nes_cm_alloc_core();
2961 if (g_cm_core) {
2962 return 0;
2963 } else {
2964 return -ENOMEM;
2965 }
2966}
2967
2968
2969/**
2970 * nes_cm_stop
2971 * stop and dealloc all cm core instances
2972 */
2973int nes_cm_stop(void)
2974{
2975 g_cm_core->api->destroy_cm_core(g_cm_core);
2976 return 0;
2977}
2978
2979
2980/**
2981 * cm_event_connected
2982 * handle a connected event, setup QPs and HW
2983 */
1a855fbf 2984static void cm_event_connected(struct nes_cm_event *event)
3c2d774c
GS		 2985{
2986 u64 u64temp;
2987 struct nes_qp *nesqp;
2988 struct nes_vnic *nesvnic;
2989 struct nes_device *nesdev;
2990 struct nes_cm_node *cm_node;
2991 struct nes_adapter *nesadapter;
2992 struct ib_qp_attr attr;
2993 struct iw_cm_id *cm_id;
2994 struct iw_cm_event cm_event;
2995 struct nes_hw_qp_wqe *wqe;
2996 struct nes_v4_quad nes_quad;
30da7cff 2997 u32 crc_value;
3c2d774c
GS		 2998 int ret;
2999
3000 /* get all our handles */
3001 cm_node = event->cm_node;
3002 cm_id = cm_node->cm_id;
3003 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3004 nesqp = (struct nes_qp *)cm_id->provider_data;
3005 nesvnic = to_nesvnic(nesqp->ibqp.device);
3006 nesdev = nesvnic->nesdev;
3007 nesadapter = nesdev->nesadapter;
3008
3009 if (nesqp->destroyed) {
3010 return;
3011 }
3012 atomic_inc(&cm_connecteds);
3013 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3014 " local port 0x%04X. jiffies = %lu.\n",
3015 nesqp->hwqp.qp_id,
3016 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3017 ntohs(cm_id->remote_addr.sin_port),
3018 ntohs(cm_id->local_addr.sin_port),
3019 jiffies);
3020
3021 nes_cm_init_tsa_conn(nesqp, cm_node);
3022
3023 /* set the QP tsa context */
6492cdf3
FL		 3024 nesqp->nesqp_context->tcpPorts[0] =
3025 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3026 nesqp->nesqp_context->tcpPorts[1] =
3027 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3028 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3029 nesqp->nesqp_context->ip0 =
3030 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3031 else
3032 nesqp->nesqp_context->ip0 =
3033 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3c2d774c
GS		 3034
3035 nesqp->nesqp_context->misc2 |= cpu_to_le32(
6492cdf3
FL		 3036 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3037 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 3038 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
6492cdf3
FL		 3039 nes_arp_table(nesdev,
3040 le32_to_cpu(nesqp->nesqp_context->ip0),
3c2d774c
GS		 3041 NULL, NES_ARP_RESOLVE) << 16);
3042 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3043 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3044 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3045 nesqp->nesqp_context->ird_ord_sizes |=
6492cdf3
FL		 3046 cpu_to_le32((u32)1 <<
3047 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3c2d774c
GS		 3048
3049 /* Adjust tail for not having a LSMM */
3050 nesqp->hwqp.sq_tail = 1;
3051
3052#if defined(NES_SEND_FIRST_WRITE)
6492cdf3
FL		 3053 if (cm_node->send_write0) {
3054 nes_debug(NES_DBG_CM, "Sending first write.\n");
3055 wqe = &nesqp->hwqp.sq_vbase[0];
3056 u64temp = (unsigned long)nesqp;
3057 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3058 set_wqe_64bit_value(wqe->wqe_words,
3059 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3060 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3061 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3062 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3063 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3064 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3065 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3066 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3067
3068 /* use the reserved spot on the WQ for the extra first WQE */
3069 nesqp->nesqp_context->ird_ord_sizes &=
3070 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3071 NES_QPCONTEXT_ORDIRD_WRPDU |
3072 NES_QPCONTEXT_ORDIRD_ALSMM));
3073 nesqp->skip_lsmm = 1;
3074 nesqp->hwqp.sq_tail = 0;
3075 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3076 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3077 }
3c2d774c
GS		 3078#endif
3079
3080 memset(&nes_quad, 0, sizeof(nes_quad));
3081
6492cdf3
FL		 3082 nes_quad.DstIpAdrIndex =
3083 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3084 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3085 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3086 else
3087 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3c2d774c
GS		 3088 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3089 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3090
3091 /* Produce hash key */
30da7cff
FL		 3092 crc_value = get_crc_value(&nes_quad);
3093 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c
GS		 3094 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3095 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3096
3097 nesqp->hte_index &= nesadapter->hte_index_mask;
3098 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3099
3100 nesqp->ietf_frame = &cm_node->mpa_frame;
3101 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3102 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3103
3c2d774c
GS		 3104 /* notify OF layer we successfully created the requested connection */
3105 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3106 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3107 cm_event.provider_data = cm_id->provider_data;
3108 cm_event.local_addr.sin_family = AF_INET;
3109 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3110 cm_event.remote_addr = cm_id->remote_addr;
3111
6492cdf3
FL		 3112 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3113 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3c2d774c
GS		 3114
3115 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3116 ret = cm_id->event_handler(cm_id, &cm_event);
3117 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3118
3119 if (ret)
6492cdf3
FL		 3120 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3121 "ret=%d\n", __func__, __LINE__, ret);
3122 attr.qp_state = IB_QPS_RTS;
3123 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 3124
6492cdf3
FL		 3125 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3126 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3c2d774c
GS		 3127
3128 return;
3129}
3130
3131
3132/**
3133 * cm_event_connect_error
3134 */
1a855fbf 3135static void cm_event_connect_error(struct nes_cm_event *event)
3c2d774c
GS		 3136{
3137 struct nes_qp *nesqp;
3138 struct iw_cm_id *cm_id;
3139 struct iw_cm_event cm_event;
3140 /* struct nes_cm_info cm_info; */
3141 int ret;
3142
3143 if (!event->cm_node)
3144 return;
3145
3146 cm_id = event->cm_node->cm_id;
3147 if (!cm_id) {
3148 return;
3149 }
3150
3151 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3152 nesqp = cm_id->provider_data;
3153
3154 if (!nesqp) {
3155 return;
3156 }
3157
3158 /* notify OF layer about this connection error event */
3159 /* cm_id->rem_ref(cm_id); */
3160 nesqp->cm_id = NULL;
3161 cm_id->provider_data = NULL;
3162 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3163 cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
3164 cm_event.provider_data = cm_id->provider_data;
3165 cm_event.local_addr = cm_id->local_addr;
3166 cm_event.remote_addr = cm_id->remote_addr;
3167 cm_event.private_data = NULL;
3168 cm_event.private_data_len = 0;
3169
6492cdf3
FL		 3170 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3171 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3172 cm_event.remote_addr.sin_addr.s_addr);
3c2d774c
GS		 3173
3174 ret = cm_id->event_handler(cm_id, &cm_event);
3175 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3176 if (ret)
6492cdf3
FL		 3177 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3178 "ret=%d\n", __func__, __LINE__, ret);
6492cdf3 3179 cm_id->rem_ref(cm_id);
3c2d774c 3180
6492cdf3 3181 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3c2d774c
GS		 3182 return;
3183}
3184
3185
3186/**
3187 * cm_event_reset
3188 */
1a855fbf 3189static void cm_event_reset(struct nes_cm_event *event)
3c2d774c
GS		 3190{
3191 struct nes_qp *nesqp;
3192 struct iw_cm_id *cm_id;
3193 struct iw_cm_event cm_event;
3194 /* struct nes_cm_info cm_info; */
3195 int ret;
3196
3197 if (!event->cm_node)
3198 return;
3199
3200 if (!event->cm_node->cm_id)
3201 return;
3202
3203 cm_id = event->cm_node->cm_id;
3204
3205 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3206 nesqp = cm_id->provider_data;
3207
3208 nesqp->cm_id = NULL;
3209 /* cm_id->provider_data = NULL; */
3210 cm_event.event = IW_CM_EVENT_DISCONNECT;
3211 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3212 cm_event.provider_data = cm_id->provider_data;
3213 cm_event.local_addr = cm_id->local_addr;
3214 cm_event.remote_addr = cm_id->remote_addr;
3215 cm_event.private_data = NULL;
3216 cm_event.private_data_len = 0;
3217
3218 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 3219 cm_id->add_ref(cm_id);
3220 atomic_inc(&cm_closes);
3221 cm_event.event = IW_CM_EVENT_CLOSE;
3222 cm_event.status = IW_CM_EVENT_STATUS_OK;
3223 cm_event.provider_data = cm_id->provider_data;
3224 cm_event.local_addr = cm_id->local_addr;
3225 cm_event.remote_addr = cm_id->remote_addr;
3226 cm_event.private_data = NULL;
3227 cm_event.private_data_len = 0;
3228 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3229 ret = cm_id->event_handler(cm_id, &cm_event);
3230
3c2d774c
GS		 3231 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3232
3233
3234 /* notify OF layer about this connection error event */
3235 cm_id->rem_ref(cm_id);
3236
3237 return;
3238}
3239
3240
3241/**
3242 * cm_event_mpa_req
3243 */
1a855fbf 3244static void cm_event_mpa_req(struct nes_cm_event *event)
3c2d774c
GS		 3245{
3246 struct iw_cm_id *cm_id;
3247 struct iw_cm_event cm_event;
3248 int ret;
3249 struct nes_cm_node *cm_node;
3250
3251 cm_node = event->cm_node;
3252 if (!cm_node)
3253 return;
3254 cm_id = cm_node->cm_id;
3255
3256 atomic_inc(&cm_connect_reqs);
3257 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3258 cm_node, cm_id, jiffies);
3259
3260 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3261 cm_event.status = IW_CM_EVENT_STATUS_OK;
3262 cm_event.provider_data = (void *)cm_node;
3263
3264 cm_event.local_addr.sin_family = AF_INET;
3265 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3266 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3267
3268 cm_event.remote_addr.sin_family = AF_INET;
3269 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3270 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3271
3272 cm_event.private_data = cm_node->mpa_frame_buf;
3273 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3274
3275 ret = cm_id->event_handler(cm_id, &cm_event);
3276 if (ret)
3277 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
33718363 3278 __func__, __LINE__, ret);
3c2d774c
GS		 3279
3280 return;
3281}
3282
3283
3284static void nes_cm_event_handler(struct work_struct *);
3285
3286/**
3287 * nes_cm_post_event
3288 * post an event to the cm event handler
3289 */
1a855fbf 3290static int nes_cm_post_event(struct nes_cm_event *event)
3c2d774c
GS		 3291{
3292 atomic_inc(&event->cm_node->cm_core->events_posted);
3293 add_ref_cm_node(event->cm_node);
3294 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3295 INIT_WORK(&event->event_work, nes_cm_event_handler);
6492cdf3
FL		 3296 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3297 event->cm_node, event);
3c2d774c
GS		 3298
3299 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3300
3301 nes_debug(NES_DBG_CM, "Exit\n");
3302 return 0;
3303}
3304
3305
3306/**
3307 * nes_cm_event_handler
3308 * worker function to handle cm events
3309 * will free instance of nes_cm_event
3310 */
3311static void nes_cm_event_handler(struct work_struct *work)
3312{
6492cdf3
FL		 3313 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3314 event_work);
3c2d774c
GS		 3315 struct nes_cm_core *cm_core;
3316
6492cdf3 3317 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3c2d774c 3318 return;
6492cdf3 3319
3c2d774c
GS		 3320 cm_core = event->cm_node->cm_core;
3321 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
6492cdf3 3322 event, event->type, atomic_read(&cm_core->events_posted));
3c2d774c
GS		 3323
3324 switch (event->type) {
6492cdf3
FL		 3325 case NES_CM_EVENT_MPA_REQ:
3326 cm_event_mpa_req(event);
3327 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3328 event->cm_node);
3329 break;
3330 case NES_CM_EVENT_RESET:
3331 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3332 event->cm_node);
3333 cm_event_reset(event);
3334 break;
3335 case NES_CM_EVENT_CONNECTED:
3336 if ((!event->cm_node->cm_id) ||
3337 (event->cm_node->state != NES_CM_STATE_TSA))
3c2d774c 3338 break;
6492cdf3
FL		 3339 cm_event_connected(event);
3340 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3341 break;
3342 case NES_CM_EVENT_ABORTED:
3343 if ((!event->cm_node->cm_id) ||
3344 (event->cm_node->state == NES_CM_STATE_TSA))
3c2d774c 3345 break;
6492cdf3
FL		 3346 cm_event_connect_error(event);
3347 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3348 break;
3349 case NES_CM_EVENT_DROPPED_PKT:
3350 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3351 break;
3352 default:
3353 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3354 break;
3c2d774c
GS		 3355 }
3356
3357 atomic_dec(&cm_core->events_posted);
3358 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3359 rem_ref_cm_node(cm_core, event->cm_node);
3360 kfree(event);
3361
3362 return;
3363}
Linux 6.x block layer and io_uring tree(s)