2 * Copyright (c) 2006 - 2008 NetEffect, Inc. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
35 #define TCPOPT_TIMESTAMP 8
37 #include <asm/atomic.h>
38 #include <linux/skbuff.h>
40 #include <linux/tcp.h>
41 #include <linux/init.h>
42 #include <linux/if_arp.h>
43 #include <linux/if_vlan.h>
44 #include <linux/notifier.h>
45 #include <linux/net.h>
46 #include <linux/types.h>
47 #include <linux/timer.h>
48 #include <linux/time.h>
49 #include <linux/delay.h>
50 #include <linux/etherdevice.h>
51 #include <linux/netdevice.h>
52 #include <linux/random.h>
53 #include <linux/list.h>
54 #include <linux/threads.h>
56 #include <net/neighbour.h>
57 #include <net/route.h>
58 #include <net/ip_fib.h>
63 u32 cm_packets_bounced;
64 u32 cm_packets_dropped;
65 u32 cm_packets_retrans;
66 u32 cm_packets_created;
67 u32 cm_packets_received;
68 u32 cm_listens_created;
69 u32 cm_listens_destroyed;
71 atomic_t cm_loopbacks;
72 atomic_t cm_nodes_created;
73 atomic_t cm_nodes_destroyed;
74 atomic_t cm_accel_dropped_pkts;
75 atomic_t cm_resets_recvd;
77 static inline int mini_cm_accelerated(struct nes_cm_core *,
78 struct nes_cm_node *);
79 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
80 struct nes_vnic *, struct nes_cm_info *);
81 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
82 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
83 struct nes_vnic *, u16, void *, struct nes_cm_info *);
84 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
85 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
86 struct nes_cm_node *);
87 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
88 struct nes_cm_node *);
89 static void mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
91 static int mini_cm_dealloc_core(struct nes_cm_core *);
92 static int mini_cm_get(struct nes_cm_core *);
93 static int mini_cm_set(struct nes_cm_core *, u32, u32);
95 static struct sk_buff *form_cm_frame(struct sk_buff *, struct nes_cm_node *,
96 void *, u32, void *, u32, u8);
97 static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node);
98 static int add_ref_cm_node(struct nes_cm_node *);
99 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
101 static int nes_cm_disconn_true(struct nes_qp *);
102 static int nes_cm_post_event(struct nes_cm_event *event);
103 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
104 static void nes_disconnect_worker(struct work_struct *work);
106 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
107 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
108 static int send_reset(struct nes_cm_node *, struct sk_buff *);
109 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
110 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
111 static void process_packet(struct nes_cm_node *, struct sk_buff *,
112 struct nes_cm_core *);
114 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
115 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
116 static void cleanup_retrans_entry(struct nes_cm_node *);
117 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *,
118 enum nes_cm_event_type);
119 static void free_retrans_entry(struct nes_cm_node *cm_node);
120 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
121 struct sk_buff *skb, int optionsize, int passive);
123 /* CM event handler functions */
124 static void cm_event_connected(struct nes_cm_event *);
125 static void cm_event_connect_error(struct nes_cm_event *);
126 static void cm_event_reset(struct nes_cm_event *);
127 static void cm_event_mpa_req(struct nes_cm_event *);
129 static void print_core(struct nes_cm_core *core);
131 /* External CM API Interface */
132 /* instance of function pointers for client API */
133 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
134 static struct nes_cm_ops nes_cm_api = {
143 mini_cm_dealloc_core,
148 static struct nes_cm_core *g_cm_core;
150 atomic_t cm_connects;
152 atomic_t cm_disconnects;
154 atomic_t cm_connecteds;
155 atomic_t cm_connect_reqs;
162 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
163 enum nes_cm_event_type type)
165 struct nes_cm_event *event;
170 /* allocate an empty event */
171 event = kzalloc(sizeof(*event), GFP_ATOMIC);
177 event->cm_node = cm_node;
178 event->cm_info.rem_addr = cm_node->rem_addr;
179 event->cm_info.loc_addr = cm_node->loc_addr;
180 event->cm_info.rem_port = cm_node->rem_port;
181 event->cm_info.loc_port = cm_node->loc_port;
182 event->cm_info.cm_id = cm_node->cm_id;
184 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
185 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
186 cm_node, event, type, event->cm_info.loc_addr,
187 event->cm_info.loc_port, event->cm_info.rem_addr,
188 event->cm_info.rem_port);
190 nes_cm_post_event(event);
198 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
202 nes_debug(NES_DBG_CM, "skb set to NULL\n");
206 /* send an MPA Request frame */
207 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
208 cm_node->mpa_frame_size, SET_ACK);
210 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
219 * recv_mpa - process a received TCP pkt, we are expecting an
222 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len)
224 struct ietf_mpa_frame *mpa_frame;
226 /* assume req frame is in tcp data payload */
227 if (len < sizeof(struct ietf_mpa_frame)) {
228 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
232 mpa_frame = (struct ietf_mpa_frame *)buffer;
233 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
235 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
236 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
237 " complete (%x + %x != %x)\n",
238 cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len);
242 /* copy entire MPA frame to our cm_node's frame */
243 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
244 cm_node->mpa_frame_size);
251 * form_cm_frame - get a free packet and build empty frame Use
252 * node info to build.
254 static struct sk_buff *form_cm_frame(struct sk_buff *skb,
255 struct nes_cm_node *cm_node, void *options, u32 optionsize,
256 void *data, u32 datasize, u8 flags)
262 u16 packetsize = sizeof(*iph);
264 packetsize += sizeof(*tcph);
265 packetsize += optionsize + datasize;
267 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
270 buf = skb_put(skb, packetsize + ETH_HLEN);
272 ethh = (struct ethhdr *) buf;
275 iph = (struct iphdr *)buf;
277 tcph = (struct tcphdr *)buf;
278 skb_reset_mac_header(skb);
279 skb_set_network_header(skb, ETH_HLEN);
280 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
281 buf += sizeof(*tcph);
283 skb->ip_summed = CHECKSUM_PARTIAL;
284 skb->protocol = htons(0x800);
286 skb->mac_len = ETH_HLEN;
288 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
289 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
290 ethh->h_proto = htons(0x0800);
292 iph->version = IPVERSION;
293 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
295 iph->tot_len = htons(packetsize);
296 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
298 iph->frag_off = htons(0x4000);
300 iph->protocol = 0x06; /* IPPROTO_TCP */
302 iph->saddr = htonl(cm_node->loc_addr);
303 iph->daddr = htonl(cm_node->rem_addr);
305 tcph->source = htons(cm_node->loc_port);
306 tcph->dest = htons(cm_node->rem_port);
307 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
309 if (flags & SET_ACK) {
310 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
311 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
316 if (flags & SET_SYN) {
317 cm_node->tcp_cntxt.loc_seq_num++;
320 cm_node->tcp_cntxt.loc_seq_num += datasize;
322 if (flags & SET_FIN) {
323 cm_node->tcp_cntxt.loc_seq_num++;
330 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
331 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
334 memcpy(buf, options, optionsize);
337 memcpy(buf, data, datasize);
339 skb_shinfo(skb)->nr_frags = 0;
340 cm_packets_created++;
347 * print_core - dump a cm core
349 static void print_core(struct nes_cm_core *core)
351 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
352 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
355 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
357 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
359 nes_debug(NES_DBG_CM, "Tx Free cnt : %u \n", skb_queue_len(&core->tx_free_list));
360 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
361 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
363 nes_debug(NES_DBG_CM, "core : %p \n", core);
365 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
371 * note - cm_node needs to be protected before calling this. Encase in:
372 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
374 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
375 enum nes_timer_type type, int send_retrans,
376 int close_when_complete)
379 struct nes_cm_core *cm_core = cm_node->cm_core;
380 struct nes_timer_entry *new_send;
386 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
390 /* new_send->timetosend = currenttime */
391 new_send->retrycount = NES_DEFAULT_RETRYS;
392 new_send->retranscount = NES_DEFAULT_RETRANS;
394 new_send->timetosend = jiffies;
395 new_send->type = type;
396 new_send->netdev = cm_node->netdev;
397 new_send->send_retrans = send_retrans;
398 new_send->close_when_complete = close_when_complete;
400 if (type == NES_TIMER_TYPE_CLOSE) {
401 new_send->timetosend += (HZ/10);
402 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
403 list_add_tail(&new_send->list, &cm_node->recv_list);
404 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
407 if (type == NES_TIMER_TYPE_SEND) {
408 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
409 atomic_inc(&new_send->skb->users);
410 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
411 cm_node->send_entry = new_send;
412 add_ref_cm_node(cm_node);
413 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
414 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
416 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
417 if (ret != NETDEV_TX_OK) {
418 nes_debug(NES_DBG_CM, "Error sending packet %p "
419 "(jiffies = %lu)\n", new_send, jiffies);
420 atomic_dec(&new_send->skb->users);
421 new_send->timetosend = jiffies;
425 cleanup_retrans_entry(cm_node);
426 if (close_when_complete)
427 rem_ref_cm_node(cm_core, cm_node);
433 was_timer_set = timer_pending(&cm_core->tcp_timer);
435 if (!was_timer_set) {
436 cm_core->tcp_timer.expires = new_send->timetosend;
437 add_timer(&cm_core->tcp_timer);
447 static void nes_cm_timer_tick(unsigned long pass)
449 unsigned long flags, qplockflags;
450 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
451 struct iw_cm_id *cm_id;
452 struct nes_cm_node *cm_node;
453 struct nes_timer_entry *send_entry, *recv_entry;
454 struct list_head *list_core, *list_core_temp;
455 struct list_head *list_node, *list_node_temp;
456 struct nes_cm_core *cm_core = g_cm_core;
457 struct nes_qp *nesqp;
459 int ret = NETDEV_TX_OK;
460 enum nes_cm_node_state last_state;
462 spin_lock_irqsave(&cm_core->ht_lock, flags);
464 list_for_each_safe(list_node, list_core_temp,
465 &cm_core->connected_nodes) {
466 cm_node = container_of(list_node, struct nes_cm_node, list);
467 add_ref_cm_node(cm_node);
468 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
469 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
470 list_for_each_safe(list_core, list_node_temp,
471 &cm_node->recv_list) {
472 recv_entry = container_of(list_core,
473 struct nes_timer_entry, list);
476 if (time_after(recv_entry->timetosend, jiffies)) {
477 if (nexttimeout > recv_entry->timetosend ||
479 nexttimeout = recv_entry->timetosend;
484 list_del(&recv_entry->list);
485 cm_id = cm_node->cm_id;
486 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
487 nesqp = (struct nes_qp *)recv_entry->skb;
488 spin_lock_irqsave(&nesqp->lock, qplockflags);
490 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
491 "refcount = %d: HIT A "
492 "NES_TIMER_TYPE_CLOSE with something "
493 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
494 atomic_read(&nesqp->refcount));
495 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
496 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
497 nesqp->ibqp_state = IB_QPS_ERR;
498 spin_unlock_irqrestore(&nesqp->lock,
500 nes_cm_disconn(nesqp);
502 spin_unlock_irqrestore(&nesqp->lock,
504 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
505 "refcount = %d: HIT A "
506 "NES_TIMER_TYPE_CLOSE with nothing "
507 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
508 atomic_read(&nesqp->refcount));
511 cm_id->rem_ref(cm_id);
514 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
516 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
518 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
520 send_entry = cm_node->send_entry;
523 if (time_after(send_entry->timetosend, jiffies)) {
524 if (cm_node->state != NES_CM_STATE_TSA) {
526 send_entry->timetosend) ||
529 send_entry->timetosend;
534 free_retrans_entry(cm_node);
539 if ((cm_node->state == NES_CM_STATE_TSA) ||
540 (cm_node->state == NES_CM_STATE_CLOSED)) {
541 free_retrans_entry(cm_node);
545 if (!send_entry->retranscount ||
546 !send_entry->retrycount) {
547 cm_packets_dropped++;
548 last_state = cm_node->state;
549 cm_node->state = NES_CM_STATE_CLOSED;
550 free_retrans_entry(cm_node);
551 spin_unlock_irqrestore(
552 &cm_node->retrans_list_lock, flags);
553 if (last_state == NES_CM_STATE_SYN_RCVD)
554 rem_ref_cm_node(cm_core, cm_node);
556 create_event(cm_node,
557 NES_CM_EVENT_ABORTED);
558 spin_lock_irqsave(&cm_node->retrans_list_lock,
562 atomic_inc(&send_entry->skb->users);
563 cm_packets_retrans++;
564 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
565 "for node %p, jiffies = %lu, time to send = "
566 "%lu, retranscount = %u, send_entry->seq_num = "
567 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
568 "0x%08X\n", send_entry, cm_node, jiffies,
569 send_entry->timetosend,
570 send_entry->retranscount,
572 cm_node->tcp_cntxt.rem_ack_num);
574 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
576 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
577 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
578 if (ret != NETDEV_TX_OK) {
579 nes_debug(NES_DBG_CM, "rexmit failed for "
580 "node=%p\n", cm_node);
581 cm_packets_bounced++;
582 atomic_dec(&send_entry->skb->users);
583 send_entry->retrycount--;
584 nexttimeout = jiffies + NES_SHORT_TIME;
590 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
591 "%u, retry count = %u.\n",
592 send_entry->retranscount,
593 send_entry->retrycount);
594 if (send_entry->send_retrans) {
595 send_entry->retranscount--;
596 send_entry->timetosend = jiffies +
598 if (nexttimeout > send_entry->timetosend ||
600 nexttimeout = send_entry->timetosend;
604 int close_when_complete;
605 close_when_complete =
606 send_entry->close_when_complete;
607 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
608 cm_node, cm_node->state);
609 free_retrans_entry(cm_node);
610 if (close_when_complete)
611 rem_ref_cm_node(cm_node->cm_core,
616 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
617 rem_ref_cm_node(cm_node->cm_core, cm_node);
618 spin_lock_irqsave(&cm_core->ht_lock, flags);
619 if (ret != NETDEV_TX_OK) {
620 nes_debug(NES_DBG_CM, "rexmit failed for cm_node=%p\n",
625 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
628 if (!timer_pending(&cm_core->tcp_timer)) {
629 cm_core->tcp_timer.expires = nexttimeout;
630 add_timer(&cm_core->tcp_timer);
639 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
644 char optionsbuffer[sizeof(struct option_mss) +
645 sizeof(struct option_windowscale) + sizeof(struct option_base) +
646 TCP_OPTIONS_PADDING];
649 /* Sending MSS option */
650 union all_known_options *options;
655 options = (union all_known_options *)&optionsbuffer[optionssize];
656 options->as_mss.optionnum = OPTION_NUMBER_MSS;
657 options->as_mss.length = sizeof(struct option_mss);
658 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
659 optionssize += sizeof(struct option_mss);
661 options = (union all_known_options *)&optionsbuffer[optionssize];
662 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
663 options->as_windowscale.length = sizeof(struct option_windowscale);
664 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
665 optionssize += sizeof(struct option_windowscale);
667 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
668 options = (union all_known_options *)&optionsbuffer[optionssize];
669 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
670 options->as_base.length = sizeof(struct option_base);
671 optionssize += sizeof(struct option_base);
672 /* we need the size to be a multiple of 4 */
673 options = (union all_known_options *)&optionsbuffer[optionssize];
676 options = (union all_known_options *)&optionsbuffer[optionssize];
681 options = (union all_known_options *)&optionsbuffer[optionssize];
682 options->as_end = OPTION_NUMBER_END;
686 skb = get_free_pkt(cm_node);
688 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
695 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
696 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
705 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
708 int flags = SET_RST | SET_ACK;
711 skb = get_free_pkt(cm_node);
713 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
717 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
718 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
727 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
732 skb = get_free_pkt(cm_node);
735 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
739 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
740 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
749 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
753 /* if we didn't get a frame get one */
755 skb = get_free_pkt(cm_node);
758 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
762 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
763 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
772 static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node)
774 struct sk_buff *skb, *new_skb;
776 /* check to see if we need to repopulate the free tx pkt queue */
777 if (skb_queue_len(&cm_node->cm_core->tx_free_list) < NES_CM_FREE_PKT_LO_WATERMARK) {
778 while (skb_queue_len(&cm_node->cm_core->tx_free_list) <
779 cm_node->cm_core->free_tx_pkt_max) {
780 /* replace the frame we took, we won't get it back */
781 new_skb = dev_alloc_skb(cm_node->cm_core->mtu);
783 /* add a replacement frame to the free tx list head */
784 skb_queue_head(&cm_node->cm_core->tx_free_list, new_skb);
788 skb = skb_dequeue(&cm_node->cm_core->tx_free_list);
795 * make_hashkey - generate hash key from node tuple
797 static inline int make_hashkey(u16 loc_port, nes_addr_t loc_addr, u16 rem_port,
802 hashkey = loc_addr + rem_addr + loc_port + rem_port;
803 hashkey = (hashkey % NES_CM_HASHTABLE_SIZE);
810 * find_node - find a cm node that matches the reference cm node
812 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
813 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
817 struct list_head *hte;
818 struct nes_cm_node *cm_node;
820 /* make a hash index key for this packet */
821 hashkey = make_hashkey(loc_port, loc_addr, rem_port, rem_addr);
823 /* get a handle on the hte */
824 hte = &cm_core->connected_nodes;
826 nes_debug(NES_DBG_CM, "Searching for an owner node: " NIPQUAD_FMT ":%x from core %p->%p\n",
827 HIPQUAD(loc_addr), loc_port, cm_core, hte);
829 /* walk list and find cm_node associated with this session ID */
830 spin_lock_irqsave(&cm_core->ht_lock, flags);
831 list_for_each_entry(cm_node, hte, list) {
832 /* compare quad, return node handle if a match */
833 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
834 cm_node->loc_addr, cm_node->loc_port,
836 cm_node->rem_addr, cm_node->rem_port,
838 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
839 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
840 add_ref_cm_node(cm_node);
841 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
845 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
853 * find_listener - find a cm node listening on this addr-port pair
855 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
856 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
859 struct nes_cm_listener *listen_node;
861 /* walk list and find cm_node associated with this session ID */
862 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
863 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
864 /* compare node pair, return node handle if a match */
865 if (((listen_node->loc_addr == dst_addr) ||
866 listen_node->loc_addr == 0x00000000) &&
867 (listen_node->loc_port == dst_port) &&
868 (listener_state & listen_node->listener_state)) {
869 atomic_inc(&listen_node->ref_count);
870 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
874 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
876 nes_debug(NES_DBG_CM, "Unable to find listener for " NIPQUAD_FMT ":%x\n",
877 HIPQUAD(dst_addr), dst_port);
885 * add_hte_node - add a cm node to the hash table
887 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
891 struct list_head *hte;
893 if (!cm_node || !cm_core)
896 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
899 /* first, make an index into our hash table */
900 hashkey = make_hashkey(cm_node->loc_port, cm_node->loc_addr,
901 cm_node->rem_port, cm_node->rem_addr);
902 cm_node->hashkey = hashkey;
904 spin_lock_irqsave(&cm_core->ht_lock, flags);
906 /* get a handle on the hash table element (list head for this slot) */
907 hte = &cm_core->connected_nodes;
908 list_add_tail(&cm_node->list, hte);
909 atomic_inc(&cm_core->ht_node_cnt);
911 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
918 * mini_cm_dec_refcnt_listen
920 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
921 struct nes_cm_listener *listener, int free_hanging_nodes)
925 struct list_head *list_pos = NULL;
926 struct list_head *list_temp = NULL;
927 struct nes_cm_node *cm_node = NULL;
929 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
930 "refcnt=%d\n", listener, free_hanging_nodes,
931 atomic_read(&listener->ref_count));
932 /* free non-accelerated child nodes for this listener */
933 if (free_hanging_nodes) {
934 spin_lock_irqsave(&cm_core->ht_lock, flags);
935 list_for_each_safe(list_pos, list_temp,
936 &g_cm_core->connected_nodes) {
937 cm_node = container_of(list_pos, struct nes_cm_node,
939 if ((cm_node->listener == listener) &&
940 (!cm_node->accelerated)) {
941 cleanup_retrans_entry(cm_node);
942 spin_unlock_irqrestore(&cm_core->ht_lock,
944 send_reset(cm_node, NULL);
945 spin_lock_irqsave(&cm_core->ht_lock, flags);
948 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
950 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
951 if (!atomic_dec_return(&listener->ref_count)) {
952 list_del(&listener->list);
954 /* decrement our listen node count */
955 atomic_dec(&cm_core->listen_node_cnt);
957 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
959 if (listener->nesvnic) {
960 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
961 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
964 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
969 cm_listens_destroyed++;
971 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
974 if (atomic_read(&listener->pend_accepts_cnt) > 0)
975 nes_debug(NES_DBG_CM, "destroying listener (%p)"
976 " with non-zero pending accepts=%u\n",
977 listener, atomic_read(&listener->pend_accepts_cnt));
987 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
988 struct nes_cm_listener *listener)
990 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
991 listener->cm_id = NULL; /* going to be destroyed pretty soon */
992 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
997 * mini_cm_accelerated
999 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1000 struct nes_cm_node *cm_node)
1003 cm_node->accelerated = 1;
1005 if (cm_node->accept_pend) {
1006 BUG_ON(!cm_node->listener);
1007 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1008 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1011 was_timer_set = timer_pending(&cm_core->tcp_timer);
1012 if (!was_timer_set) {
1013 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1014 add_timer(&cm_core->tcp_timer);
1022 * nes_addr_resolve_neigh
1024 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
1028 struct neighbour *neigh;
1030 DECLARE_MAC_BUF(mac);
1032 memset(&fl, 0, sizeof fl);
1033 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1034 if (ip_route_output_key(&init_net, &rt, &fl)) {
1035 printk("%s: ip_route_output_key failed for 0x%08X\n",
1040 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1042 if (neigh->nud_state & NUD_VALID) {
1043 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1044 " is %s, Gateway is 0x%08X \n", dst_ip,
1045 print_mac(mac, neigh->ha), ntohl(rt->rt_gateway));
1046 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1047 dst_ip, NES_ARP_ADD);
1048 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1051 neigh_release(neigh);
1054 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1055 neigh_event_send(rt->u.dst.neighbour, NULL);
1063 * make_cm_node - create a new instance of a cm node
1065 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1066 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1067 struct nes_cm_listener *listener)
1069 struct nes_cm_node *cm_node;
1072 struct nes_device *nesdev;
1073 struct nes_adapter *nesadapter;
1074 DECLARE_MAC_BUF(mac);
1076 /* create an hte and cm_node for this instance */
1077 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1081 /* set our node specific transport info */
1082 cm_node->loc_addr = cm_info->loc_addr;
1083 cm_node->rem_addr = cm_info->rem_addr;
1084 cm_node->loc_port = cm_info->loc_port;
1085 cm_node->rem_port = cm_info->rem_port;
1086 cm_node->send_write0 = send_first;
1087 nes_debug(NES_DBG_CM, "Make node addresses : loc = " NIPQUAD_FMT
1088 ":%x, rem = " NIPQUAD_FMT ":%x\n",
1089 HIPQUAD(cm_node->loc_addr), cm_node->loc_port,
1090 HIPQUAD(cm_node->rem_addr), cm_node->rem_port);
1091 cm_node->listener = listener;
1092 cm_node->netdev = nesvnic->netdev;
1093 cm_node->cm_id = cm_info->cm_id;
1094 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1096 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1099 spin_lock_init(&cm_node->retrans_list_lock);
1100 INIT_LIST_HEAD(&cm_node->recv_list);
1101 spin_lock_init(&cm_node->recv_list_lock);
1103 cm_node->loopbackpartner = NULL;
1104 atomic_set(&cm_node->ref_count, 1);
1105 /* associate our parent CM core */
1106 cm_node->cm_core = cm_core;
1107 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1108 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1109 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1110 NES_CM_DEFAULT_RCV_WND_SCALE;
1111 ts = current_kernel_time();
1112 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1113 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1114 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1115 cm_node->tcp_cntxt.rcv_nxt = 0;
1116 /* get a unique session ID , add thread_id to an upcounter to handle race */
1117 atomic_inc(&cm_core->node_cnt);
1118 cm_node->conn_type = cm_info->conn_type;
1119 cm_node->apbvt_set = 0;
1120 cm_node->accept_pend = 0;
1122 cm_node->nesvnic = nesvnic;
1123 /* get some device handles, for arp lookup */
1124 nesdev = nesvnic->nesdev;
1125 nesadapter = nesdev->nesadapter;
1127 cm_node->loopbackpartner = NULL;
1128 /* get the mac addr for the remote node */
1129 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1131 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1138 /* copy the mac addr to node context */
1139 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1140 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %s\n",
1141 print_mac(mac, cm_node->rem_mac));
1143 add_hte_node(cm_core, cm_node);
1144 atomic_inc(&cm_nodes_created);
1151 * add_ref_cm_node - destroy an instance of a cm node
1153 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1155 atomic_inc(&cm_node->ref_count);
1161 * rem_ref_cm_node - destroy an instance of a cm node
1163 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1164 struct nes_cm_node *cm_node)
1166 unsigned long flags, qplockflags;
1167 struct nes_timer_entry *recv_entry;
1168 struct iw_cm_id *cm_id;
1169 struct list_head *list_core, *list_node_temp;
1170 struct nes_qp *nesqp;
1175 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1176 if (atomic_dec_return(&cm_node->ref_count)) {
1177 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1180 list_del(&cm_node->list);
1181 atomic_dec(&cm_core->ht_node_cnt);
1182 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1184 /* if the node is destroyed before connection was accelerated */
1185 if (!cm_node->accelerated && cm_node->accept_pend) {
1186 BUG_ON(!cm_node->listener);
1187 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1188 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1190 BUG_ON(cm_node->send_entry);
1191 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1192 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
1193 recv_entry = container_of(list_core, struct nes_timer_entry,
1195 list_del(&recv_entry->list);
1196 cm_id = cm_node->cm_id;
1197 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1198 nesqp = (struct nes_qp *)recv_entry->skb;
1199 spin_lock_irqsave(&nesqp->lock, qplockflags);
1201 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1202 "NES_TIMER_TYPE_CLOSE with something to do!\n",
1203 nesqp->hwqp.qp_id, cm_id);
1204 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1205 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1206 nesqp->ibqp_state = IB_QPS_ERR;
1207 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1208 nes_cm_disconn(nesqp);
1210 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1211 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1212 "NES_TIMER_TYPE_CLOSE with nothing to do!\n",
1213 nesqp->hwqp.qp_id, cm_id);
1215 cm_id->rem_ref(cm_id);
1218 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1220 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1222 if (cm_node->listener) {
1223 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1225 if (cm_node->apbvt_set && cm_node->nesvnic) {
1226 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1228 cm_node->nesvnic->nesdev->pcidev->devfn),
1229 NES_MANAGE_APBVT_DEL);
1233 atomic_dec(&cm_core->node_cnt);
1234 atomic_inc(&cm_nodes_destroyed);
1235 nesqp = cm_node->nesqp;
1237 nesqp->cm_node = NULL;
1238 nes_rem_ref(&nesqp->ibqp);
1239 cm_node->nesqp = NULL;
1250 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1251 u32 optionsize, u32 syn_packet)
1255 union all_known_options *all_options;
1256 char got_mss_option = 0;
1258 while (offset < optionsize) {
1259 all_options = (union all_known_options *)(optionsloc + offset);
1260 switch (all_options->as_base.optionnum) {
1261 case OPTION_NUMBER_END:
1262 offset = optionsize;
1264 case OPTION_NUMBER_NONE:
1267 case OPTION_NUMBER_MSS:
1268 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1269 "Size: %d\n", __func__,
1270 all_options->as_mss.length, offset, optionsize);
1272 if (all_options->as_mss.length != 4) {
1275 tmp = ntohs(all_options->as_mss.mss);
1276 if (tmp > 0 && tmp <
1277 cm_node->tcp_cntxt.mss)
1278 cm_node->tcp_cntxt.mss = tmp;
1281 case OPTION_NUMBER_WINDOW_SCALE:
1282 cm_node->tcp_cntxt.snd_wscale =
1283 all_options->as_windowscale.shiftcount;
1285 case OPTION_NUMBER_WRITE0:
1286 cm_node->send_write0 = 1;
1289 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1290 all_options->as_base.optionnum);
1293 offset += all_options->as_base.length;
1295 if ((!got_mss_option) && (syn_packet))
1296 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1300 static void drop_packet(struct sk_buff *skb)
1302 atomic_inc(&cm_accel_dropped_pkts);
1303 dev_kfree_skb_any(skb);
1306 static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1307 struct tcphdr *tcph)
1309 atomic_inc(&cm_resets_recvd);
1310 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1311 "refcnt=%d\n", cm_node, cm_node->state,
1312 atomic_read(&cm_node->ref_count));
1313 cm_node->tcp_cntxt.rcv_nxt++;
1314 cleanup_retrans_entry(cm_node);
1315 switch (cm_node->state) {
1316 case NES_CM_STATE_SYN_RCVD:
1317 case NES_CM_STATE_SYN_SENT:
1318 case NES_CM_STATE_ESTABLISHED:
1319 case NES_CM_STATE_MPAREQ_SENT:
1320 cm_node->state = NES_CM_STATE_LAST_ACK;
1321 send_fin(cm_node, skb);
1323 case NES_CM_STATE_FIN_WAIT1:
1324 cm_node->state = NES_CM_STATE_CLOSING;
1325 send_ack(cm_node, skb);
1327 case NES_CM_STATE_FIN_WAIT2:
1328 cm_node->state = NES_CM_STATE_TIME_WAIT;
1329 send_ack(cm_node, skb);
1330 cm_node->state = NES_CM_STATE_CLOSED;
1332 case NES_CM_STATE_TSA:
1334 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1335 cm_node, cm_node->state);
1342 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1343 struct tcphdr *tcph)
1346 int reset = 0; /* whether to send reset in case of err.. */
1347 atomic_inc(&cm_resets_recvd);
1348 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1349 " refcnt=%d\n", cm_node, cm_node->state,
1350 atomic_read(&cm_node->ref_count));
1351 cleanup_retrans_entry(cm_node);
1352 switch (cm_node->state) {
1353 case NES_CM_STATE_SYN_SENT:
1354 case NES_CM_STATE_MPAREQ_SENT:
1355 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1356 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1357 cm_node->listener, cm_node->state);
1358 active_open_err(cm_node, skb, reset);
1360 /* For PASSIVE open states, remove the cm_node event */
1361 case NES_CM_STATE_ESTABLISHED:
1362 case NES_CM_STATE_SYN_RCVD:
1363 case NES_CM_STATE_LISTENING:
1364 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1365 passive_open_err(cm_node, skb, reset);
1367 case NES_CM_STATE_TSA:
1373 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb,
1374 enum nes_cm_event_type type)
1378 int datasize = skb->len;
1379 u8 *dataloc = skb->data;
1380 ret = parse_mpa(cm_node, dataloc, datasize);
1382 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1383 if (type == NES_CM_EVENT_CONNECTED) {
1384 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1385 "cm_node=%p listener=%p state=%d\n", __func__,
1386 __LINE__, cm_node, cm_node->listener,
1388 active_open_err(cm_node, skb, 1);
1390 passive_open_err(cm_node, skb, 1);
1393 cleanup_retrans_entry(cm_node);
1394 dev_kfree_skb_any(skb);
1395 if (type == NES_CM_EVENT_CONNECTED)
1396 cm_node->state = NES_CM_STATE_TSA;
1397 create_event(cm_node, type);
1403 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1405 switch (cm_node->state) {
1406 case NES_CM_STATE_SYN_SENT:
1407 case NES_CM_STATE_MPAREQ_SENT:
1408 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1409 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1410 cm_node->listener, cm_node->state);
1411 active_open_err(cm_node, skb, 1);
1413 case NES_CM_STATE_ESTABLISHED:
1414 case NES_CM_STATE_SYN_RCVD:
1415 passive_open_err(cm_node, skb, 1);
1417 case NES_CM_STATE_TSA:
1423 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1424 struct sk_buff *skb)
1428 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1430 active_open_err(cm_node, skb, 1);
1435 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1436 struct sk_buff *skb)
1441 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1442 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1444 seq = ntohl(tcph->seq);
1445 ack_seq = ntohl(tcph->ack_seq);
1446 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1447 if (ack_seq != loc_seq_num)
1449 else if ((seq + rcv_wnd) < rcv_nxt)
1452 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1453 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1454 cm_node->listener, cm_node->state);
1455 indicate_pkt_err(cm_node, skb);
1456 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1457 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1464 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1465 * is created with a listener or it may comein as rexmitted packet which in
1466 * that case will be just dropped.
1469 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1470 struct tcphdr *tcph)
1476 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1477 skb_pull(skb, tcph->doff << 2);
1478 inc_sequence = ntohl(tcph->seq);
1480 switch (cm_node->state) {
1481 case NES_CM_STATE_SYN_SENT:
1482 case NES_CM_STATE_MPAREQ_SENT:
1483 /* Rcvd syn on active open connection*/
1484 active_open_err(cm_node, skb, 1);
1486 case NES_CM_STATE_LISTENING:
1488 cm_node->accept_pend = 1;
1489 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1490 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1491 cm_node->listener->backlog) {
1492 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1495 passive_open_err(cm_node, skb, 0);
1498 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1501 passive_open_err(cm_node, skb, 0);
1505 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1506 BUG_ON(cm_node->send_entry);
1507 cm_node->state = NES_CM_STATE_SYN_RCVD;
1508 send_syn(cm_node, 1, skb);
1510 case NES_CM_STATE_TSA:
1511 case NES_CM_STATE_ESTABLISHED:
1512 case NES_CM_STATE_FIN_WAIT1:
1513 case NES_CM_STATE_FIN_WAIT2:
1514 case NES_CM_STATE_MPAREQ_RCVD:
1515 case NES_CM_STATE_LAST_ACK:
1516 case NES_CM_STATE_CLOSING:
1517 case NES_CM_STATE_UNKNOWN:
1518 case NES_CM_STATE_CLOSED:
1525 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1526 struct tcphdr *tcph)
1533 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1534 skb_pull(skb, tcph->doff << 2);
1535 inc_sequence = ntohl(tcph->seq);
1536 switch (cm_node->state) {
1537 case NES_CM_STATE_SYN_SENT:
1539 if (check_syn(cm_node, tcph, skb))
1541 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1543 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1545 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1549 cleanup_retrans_entry(cm_node);
1550 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1551 send_mpa_request(cm_node, skb);
1552 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1554 case NES_CM_STATE_MPAREQ_RCVD:
1555 /* passive open, so should not be here */
1556 passive_open_err(cm_node, skb, 1);
1558 case NES_CM_STATE_ESTABLISHED:
1559 case NES_CM_STATE_FIN_WAIT1:
1560 case NES_CM_STATE_FIN_WAIT2:
1561 case NES_CM_STATE_LAST_ACK:
1562 case NES_CM_STATE_TSA:
1563 case NES_CM_STATE_CLOSING:
1564 case NES_CM_STATE_UNKNOWN:
1565 case NES_CM_STATE_CLOSED:
1566 case NES_CM_STATE_MPAREQ_SENT:
1573 static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1574 struct tcphdr *tcph)
1580 if (check_seq(cm_node, tcph, skb))
1583 skb_pull(skb, tcph->doff << 2);
1584 inc_sequence = ntohl(tcph->seq);
1585 rem_seq = ntohl(tcph->seq);
1586 rem_seq_ack = ntohl(tcph->ack_seq);
1587 datasize = skb->len;
1589 switch (cm_node->state) {
1590 case NES_CM_STATE_SYN_RCVD:
1592 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1593 cm_node->state = NES_CM_STATE_ESTABLISHED;
1595 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1596 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1597 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ);
1598 } else { /* rcvd ACK only */
1599 dev_kfree_skb_any(skb);
1600 cleanup_retrans_entry(cm_node);
1603 case NES_CM_STATE_ESTABLISHED:
1605 /* We expect mpa frame to be received only */
1607 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1608 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1609 handle_rcv_mpa(cm_node, skb,
1610 NES_CM_EVENT_MPA_REQ);
1614 case NES_CM_STATE_MPAREQ_SENT:
1615 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1617 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1618 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED);
1619 } else { /* Could be just an ack pkt.. */
1620 cleanup_retrans_entry(cm_node);
1621 dev_kfree_skb_any(skb);
1624 case NES_CM_STATE_FIN_WAIT1:
1625 case NES_CM_STATE_SYN_SENT:
1626 case NES_CM_STATE_FIN_WAIT2:
1627 case NES_CM_STATE_TSA:
1628 case NES_CM_STATE_CLOSED:
1629 case NES_CM_STATE_MPAREQ_RCVD:
1630 case NES_CM_STATE_LAST_ACK:
1631 case NES_CM_STATE_CLOSING:
1632 case NES_CM_STATE_UNKNOWN:
1641 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1642 struct sk_buff *skb, int optionsize, int passive)
1644 u8 *optionsloc = (u8 *)&tcph[1];
1646 if (process_options(cm_node, optionsloc, optionsize,
1648 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1651 passive_open_err(cm_node, skb, 0);
1653 active_open_err(cm_node, skb, 0);
1658 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1659 cm_node->tcp_cntxt.snd_wscale;
1661 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1662 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1667 * active_open_err() will send reset() if flag set..
1668 * It will also send ABORT event.
1671 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1674 cleanup_retrans_entry(cm_node);
1676 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1677 "state=%d\n", cm_node, cm_node->state);
1678 add_ref_cm_node(cm_node);
1679 send_reset(cm_node, skb);
1681 dev_kfree_skb_any(skb);
1683 cm_node->state = NES_CM_STATE_CLOSED;
1684 create_event(cm_node, NES_CM_EVENT_ABORTED);
1688 * passive_open_err() will either do a reset() or will free up the skb and
1689 * remove the cm_node.
1692 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1695 cleanup_retrans_entry(cm_node);
1696 cm_node->state = NES_CM_STATE_CLOSED;
1698 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1699 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1700 send_reset(cm_node, skb);
1702 dev_kfree_skb_any(skb);
1703 rem_ref_cm_node(cm_node->cm_core, cm_node);
1708 * free_retrans_entry() routines assumes that the retrans_list_lock has
1709 * been acquired before calling.
1711 static void free_retrans_entry(struct nes_cm_node *cm_node)
1713 struct nes_timer_entry *send_entry;
1714 send_entry = cm_node->send_entry;
1716 cm_node->send_entry = NULL;
1717 dev_kfree_skb_any(send_entry->skb);
1719 rem_ref_cm_node(cm_node->cm_core, cm_node);
1723 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1725 unsigned long flags;
1727 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1728 free_retrans_entry(cm_node);
1729 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1734 * Returns skb if to be freed, else it will return NULL if already used..
1736 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1737 struct nes_cm_core *cm_core)
1739 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1740 struct tcphdr *tcph = tcp_hdr(skb);
1741 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1743 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1744 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1745 tcph->ack, tcph->rst, tcph->fin);
1748 pkt_type = NES_PKT_TYPE_RST;
1749 else if (tcph->syn) {
1750 pkt_type = NES_PKT_TYPE_SYN;
1752 pkt_type = NES_PKT_TYPE_SYNACK;
1753 } else if (tcph->fin)
1754 pkt_type = NES_PKT_TYPE_FIN;
1756 pkt_type = NES_PKT_TYPE_ACK;
1759 case NES_PKT_TYPE_SYN:
1760 handle_syn_pkt(cm_node, skb, tcph);
1762 case NES_PKT_TYPE_SYNACK:
1763 handle_synack_pkt(cm_node, skb, tcph);
1765 case NES_PKT_TYPE_ACK:
1766 handle_ack_pkt(cm_node, skb, tcph);
1768 case NES_PKT_TYPE_RST:
1769 handle_rst_pkt(cm_node, skb, tcph);
1771 case NES_PKT_TYPE_FIN:
1772 handle_fin_pkt(cm_node, skb, tcph);
1781 * mini_cm_listen - create a listen node with params
1783 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1784 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1786 struct nes_cm_listener *listener;
1787 unsigned long flags;
1789 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1790 cm_info->loc_addr, cm_info->loc_port);
1792 /* cannot have multiple matching listeners */
1793 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1794 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1795 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1796 /* find automatically incs ref count ??? */
1797 atomic_dec(&listener->ref_count);
1798 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1803 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1804 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1806 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1810 listener->loc_addr = htonl(cm_info->loc_addr);
1811 listener->loc_port = htons(cm_info->loc_port);
1812 listener->reused_node = 0;
1814 atomic_set(&listener->ref_count, 1);
1817 /* find already inc'ed the ref count */
1819 listener->reused_node = 1;
1822 listener->cm_id = cm_info->cm_id;
1823 atomic_set(&listener->pend_accepts_cnt, 0);
1824 listener->cm_core = cm_core;
1825 listener->nesvnic = nesvnic;
1826 atomic_inc(&cm_core->node_cnt);
1828 listener->conn_type = cm_info->conn_type;
1829 listener->backlog = cm_info->backlog;
1830 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1832 if (!listener->reused_node) {
1833 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1834 list_add(&listener->list, &cm_core->listen_list.list);
1835 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1836 atomic_inc(&cm_core->listen_node_cnt);
1839 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1840 " listener = %p, backlog = %d, cm_id = %p.\n",
1841 cm_info->loc_addr, cm_info->loc_port,
1842 listener, listener->backlog, listener->cm_id);
1849 * mini_cm_connect - make a connection node with params
1851 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1852 struct nes_vnic *nesvnic, u16 private_data_len,
1853 void *private_data, struct nes_cm_info *cm_info)
1856 struct nes_cm_node *cm_node;
1857 struct nes_cm_listener *loopbackremotelistener;
1858 struct nes_cm_node *loopbackremotenode;
1859 struct nes_cm_info loopback_cm_info;
1860 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
1861 struct ietf_mpa_frame *mpa_frame = NULL;
1863 /* create a CM connection node */
1864 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1867 mpa_frame = &cm_node->mpa_frame;
1868 strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ);
1869 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
1870 mpa_frame->rev = IETF_MPA_VERSION;
1871 mpa_frame->priv_data_len = htons(private_data_len);
1873 /* set our node side to client (active) side */
1874 cm_node->tcp_cntxt.client = 1;
1875 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1877 if (cm_info->loc_addr == cm_info->rem_addr) {
1878 loopbackremotelistener = find_listener(cm_core,
1879 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
1880 NES_CM_LISTENER_ACTIVE_STATE);
1881 if (loopbackremotelistener == NULL) {
1882 create_event(cm_node, NES_CM_EVENT_ABORTED);
1884 atomic_inc(&cm_loopbacks);
1885 loopback_cm_info = *cm_info;
1886 loopback_cm_info.loc_port = cm_info->rem_port;
1887 loopback_cm_info.rem_port = cm_info->loc_port;
1888 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
1889 loopbackremotenode = make_cm_node(cm_core, nesvnic,
1890 &loopback_cm_info, loopbackremotelistener);
1891 loopbackremotenode->loopbackpartner = cm_node;
1892 loopbackremotenode->tcp_cntxt.rcv_wscale =
1893 NES_CM_DEFAULT_RCV_WND_SCALE;
1894 cm_node->loopbackpartner = loopbackremotenode;
1895 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
1897 loopbackremotenode->mpa_frame_size = private_data_len;
1899 /* we are done handling this state. */
1900 /* set node to a TSA state */
1901 cm_node->state = NES_CM_STATE_TSA;
1902 cm_node->tcp_cntxt.rcv_nxt =
1903 loopbackremotenode->tcp_cntxt.loc_seq_num;
1904 loopbackremotenode->tcp_cntxt.rcv_nxt =
1905 cm_node->tcp_cntxt.loc_seq_num;
1906 cm_node->tcp_cntxt.max_snd_wnd =
1907 loopbackremotenode->tcp_cntxt.rcv_wnd;
1908 loopbackremotenode->tcp_cntxt.max_snd_wnd =
1909 cm_node->tcp_cntxt.rcv_wnd;
1910 cm_node->tcp_cntxt.snd_wnd =
1911 loopbackremotenode->tcp_cntxt.rcv_wnd;
1912 loopbackremotenode->tcp_cntxt.snd_wnd =
1913 cm_node->tcp_cntxt.rcv_wnd;
1914 cm_node->tcp_cntxt.snd_wscale =
1915 loopbackremotenode->tcp_cntxt.rcv_wscale;
1916 loopbackremotenode->tcp_cntxt.snd_wscale =
1917 cm_node->tcp_cntxt.rcv_wscale;
1919 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1924 /* set our node side to client (active) side */
1925 cm_node->tcp_cntxt.client = 1;
1926 /* init our MPA frame ptr */
1927 memcpy(mpa_frame->priv_data, private_data, private_data_len);
1929 cm_node->mpa_frame_size = mpa_frame_size;
1931 /* send a syn and goto syn sent state */
1932 cm_node->state = NES_CM_STATE_SYN_SENT;
1933 ret = send_syn(cm_node, 0, NULL);
1936 /* error in sending the syn free up the cm_node struct */
1937 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
1938 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
1939 cm_node->rem_addr, cm_node->rem_port, cm_node,
1941 rem_ref_cm_node(cm_node->cm_core, cm_node);
1946 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
1947 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
1948 cm_node->rem_addr, cm_node->rem_port, cm_node,
1956 * mini_cm_accept - accept a connection
1957 * This function is never called
1959 static int mini_cm_accept(struct nes_cm_core *cm_core,
1960 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
1967 * mini_cm_reject - reject and teardown a connection
1969 static int mini_cm_reject(struct nes_cm_core *cm_core,
1970 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
1974 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
1975 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
1977 if (cm_node->tcp_cntxt.client)
1979 cleanup_retrans_entry(cm_node);
1980 cm_node->state = NES_CM_STATE_CLOSED;
1982 ret = send_reset(cm_node, NULL);
1990 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1994 if (!cm_core || !cm_node)
1997 switch (cm_node->state) {
1998 case NES_CM_STATE_SYN_RCVD:
1999 case NES_CM_STATE_SYN_SENT:
2000 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2001 case NES_CM_STATE_ESTABLISHED:
2002 case NES_CM_STATE_ACCEPTING:
2003 case NES_CM_STATE_MPAREQ_SENT:
2004 case NES_CM_STATE_MPAREQ_RCVD:
2005 cleanup_retrans_entry(cm_node);
2006 send_reset(cm_node, NULL);
2008 case NES_CM_STATE_CLOSE_WAIT:
2009 cm_node->state = NES_CM_STATE_LAST_ACK;
2010 send_fin(cm_node, NULL);
2012 case NES_CM_STATE_FIN_WAIT1:
2013 case NES_CM_STATE_FIN_WAIT2:
2014 case NES_CM_STATE_LAST_ACK:
2015 case NES_CM_STATE_TIME_WAIT:
2016 case NES_CM_STATE_CLOSING:
2019 case NES_CM_STATE_LISTENING:
2020 case NES_CM_STATE_UNKNOWN:
2021 case NES_CM_STATE_INITED:
2022 case NES_CM_STATE_CLOSED:
2023 ret = rem_ref_cm_node(cm_core, cm_node);
2025 case NES_CM_STATE_TSA:
2026 if (cm_node->send_entry)
2027 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2028 "send_entry=%p\n", cm_node->send_entry);
2029 ret = rem_ref_cm_node(cm_core, cm_node);
2037 * recv_pkt - recv an ETHERNET packet, and process it through CM
2038 * node state machine
2040 static void mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2041 struct nes_vnic *nesvnic, struct sk_buff *skb)
2043 struct nes_cm_node *cm_node = NULL;
2044 struct nes_cm_listener *listener = NULL;
2046 struct tcphdr *tcph;
2047 struct nes_cm_info nfo;
2051 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2052 dev_kfree_skb_any(skb);
2056 iph = (struct iphdr *)skb->data;
2057 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2058 skb_reset_network_header(skb);
2059 skb_set_transport_header(skb, sizeof(*tcph));
2061 dev_kfree_skb_any(skb);
2064 skb->len = ntohs(iph->tot_len);
2066 nfo.loc_addr = ntohl(iph->daddr);
2067 nfo.loc_port = ntohs(tcph->dest);
2068 nfo.rem_addr = ntohl(iph->saddr);
2069 nfo.rem_port = ntohs(tcph->source);
2071 nes_debug(NES_DBG_CM, "Received packet: dest=" NIPQUAD_FMT
2072 ":0x%04X src=" NIPQUAD_FMT ":0x%04X\n",
2073 NIPQUAD(iph->daddr), tcph->dest,
2074 NIPQUAD(iph->saddr), tcph->source);
2077 cm_node = find_node(cm_core,
2078 nfo.rem_port, nfo.rem_addr,
2079 nfo.loc_port, nfo.loc_addr);
2082 /* Only type of packet accepted are for */
2083 /* the PASSIVE open (syn only) */
2084 if ((!tcph->syn) || (tcph->ack)) {
2085 cm_packets_dropped++;
2088 listener = find_listener(cm_core, nfo.loc_addr,
2090 NES_CM_LISTENER_ACTIVE_STATE);
2092 nfo.cm_id = listener->cm_id;
2093 nfo.conn_type = listener->conn_type;
2095 nes_debug(NES_DBG_CM, "Unable to find listener "
2097 cm_packets_dropped++;
2098 dev_kfree_skb_any(skb);
2102 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2105 nes_debug(NES_DBG_CM, "Unable to allocate "
2107 cm_packets_dropped++;
2108 atomic_dec(&listener->ref_count);
2109 dev_kfree_skb_any(skb);
2112 if (!tcph->rst && !tcph->fin) {
2113 cm_node->state = NES_CM_STATE_LISTENING;
2115 cm_packets_dropped++;
2116 rem_ref_cm_node(cm_core, cm_node);
2117 dev_kfree_skb_any(skb);
2120 add_ref_cm_node(cm_node);
2121 } else if (cm_node->state == NES_CM_STATE_TSA) {
2122 rem_ref_cm_node(cm_core, cm_node);
2123 atomic_inc(&cm_accel_dropped_pkts);
2124 dev_kfree_skb_any(skb);
2127 process_packet(cm_node, skb, cm_core);
2128 rem_ref_cm_node(cm_core, cm_node);
2134 * nes_cm_alloc_core - allocate a top level instance of a cm core
2136 static struct nes_cm_core *nes_cm_alloc_core(void)
2140 struct nes_cm_core *cm_core;
2141 struct sk_buff *skb = NULL;
2143 /* setup the CM core */
2144 /* alloc top level core control structure */
2145 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2149 INIT_LIST_HEAD(&cm_core->connected_nodes);
2150 init_timer(&cm_core->tcp_timer);
2151 cm_core->tcp_timer.function = nes_cm_timer_tick;
2153 cm_core->mtu = NES_CM_DEFAULT_MTU;
2154 cm_core->state = NES_CM_STATE_INITED;
2155 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2157 atomic_set(&cm_core->events_posted, 0);
2159 /* init the packet lists */
2160 skb_queue_head_init(&cm_core->tx_free_list);
2162 for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) {
2163 skb = dev_alloc_skb(cm_core->mtu);
2168 /* add 'raw' skb to free frame list */
2169 skb_queue_head(&cm_core->tx_free_list, skb);
2172 cm_core->api = &nes_cm_api;
2174 spin_lock_init(&cm_core->ht_lock);
2175 spin_lock_init(&cm_core->listen_list_lock);
2177 INIT_LIST_HEAD(&cm_core->listen_list.list);
2179 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2181 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2182 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2183 cm_core->post_event = nes_cm_post_event;
2184 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2185 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2187 print_core(cm_core);
2193 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2195 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2197 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2204 if (timer_pending(&cm_core->tcp_timer)) {
2205 del_timer(&cm_core->tcp_timer);
2208 destroy_workqueue(cm_core->event_wq);
2209 destroy_workqueue(cm_core->disconn_wq);
2210 nes_debug(NES_DBG_CM, "\n");
2220 static int mini_cm_get(struct nes_cm_core *cm_core)
2222 return cm_core->state;
2229 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2234 case NES_CM_SET_PKT_SIZE:
2235 cm_core->mtu = value;
2237 case NES_CM_SET_FREE_PKT_Q_SIZE:
2238 cm_core->free_tx_pkt_max = value;
2241 /* unknown set option */
2250 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2251 * successfully exchanged when this is called
2253 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2260 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2261 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2262 NES_QPCONTEXT_MISC_DROS);
2264 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2265 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2267 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2269 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2271 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2272 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2274 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2275 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2276 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2278 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2279 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2280 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2282 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2283 nesqp->nesqp_context->ts_recent = 0;
2284 nesqp->nesqp_context->ts_age = 0;
2285 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2286 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2287 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2288 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2289 cm_node->tcp_cntxt.rcv_wscale);
2290 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2291 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2292 nesqp->nesqp_context->srtt = 0;
2293 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2294 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2295 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2296 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2297 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2298 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2300 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2301 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2302 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2303 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2304 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2305 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2306 le32_to_cpu(nesqp->nesqp_context->misc));
2307 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2308 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2309 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2311 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2312 cm_node->state = NES_CM_STATE_TSA;
2321 int nes_cm_disconn(struct nes_qp *nesqp)
2323 unsigned long flags;
2325 spin_lock_irqsave(&nesqp->lock, flags);
2326 if (nesqp->disconn_pending == 0) {
2327 nesqp->disconn_pending++;
2328 spin_unlock_irqrestore(&nesqp->lock, flags);
2329 /* init our disconnect work element, to */
2330 INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
2332 queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
2334 spin_unlock_irqrestore(&nesqp->lock, flags);
2341 * nes_disconnect_worker
2343 static void nes_disconnect_worker(struct work_struct *work)
2345 struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
2347 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2348 nesqp->last_aeq, nesqp->hwqp.qp_id);
2349 nes_cm_disconn_true(nesqp);
2354 * nes_cm_disconn_true
2356 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2358 unsigned long flags;
2360 struct iw_cm_id *cm_id;
2361 struct iw_cm_event cm_event;
2362 struct nes_vnic *nesvnic;
2364 u8 original_hw_tcp_state;
2365 u8 original_ibqp_state;
2366 u8 issued_disconnect_reset = 0;
2369 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2373 spin_lock_irqsave(&nesqp->lock, flags);
2374 cm_id = nesqp->cm_id;
2375 /* make sure we havent already closed this connection */
2377 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2379 spin_unlock_irqrestore(&nesqp->lock, flags);
2383 nesvnic = to_nesvnic(nesqp->ibqp.device);
2384 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2386 original_hw_tcp_state = nesqp->hw_tcp_state;
2387 original_ibqp_state = nesqp->ibqp_state;
2388 last_ae = nesqp->last_aeq;
2391 nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
2393 if ((nesqp->cm_id) && (cm_id->event_handler)) {
2394 if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2395 ((original_ibqp_state == IB_QPS_RTS) &&
2396 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2397 atomic_inc(&cm_disconnects);
2398 cm_event.event = IW_CM_EVENT_DISCONNECT;
2399 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
2400 issued_disconnect_reset = 1;
2401 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2402 nes_debug(NES_DBG_CM, "Generating a CM "
2403 "Disconnect Event (status reset) for "
2404 "QP%u, cm_id = %p. \n",
2405 nesqp->hwqp.qp_id, cm_id);
2407 cm_event.status = IW_CM_EVENT_STATUS_OK;
2409 cm_event.local_addr = cm_id->local_addr;
2410 cm_event.remote_addr = cm_id->remote_addr;
2411 cm_event.private_data = NULL;
2412 cm_event.private_data_len = 0;
2414 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2415 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2416 "cm_id = %p, refcount = %u.\n",
2417 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2418 nesqp->hwqp.sq_tail, cm_id,
2419 atomic_read(&nesqp->refcount));
2421 spin_unlock_irqrestore(&nesqp->lock, flags);
2422 ret = cm_id->event_handler(cm_id, &cm_event);
2424 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2425 "returned, ret=%d\n", ret);
2426 spin_lock_irqsave(&nesqp->lock, flags);
2429 nesqp->disconn_pending = 0;
2430 /* There might have been another AE while the lock was released */
2431 original_hw_tcp_state = nesqp->hw_tcp_state;
2432 original_ibqp_state = nesqp->ibqp_state;
2433 last_ae = nesqp->last_aeq;
2435 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2436 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2437 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2438 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2439 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2440 atomic_inc(&cm_closes);
2441 nesqp->cm_id = NULL;
2442 nesqp->in_disconnect = 0;
2443 spin_unlock_irqrestore(&nesqp->lock, flags);
2444 nes_disconnect(nesqp, 1);
2446 cm_id->provider_data = nesqp;
2447 /* Send up the close complete event */
2448 cm_event.event = IW_CM_EVENT_CLOSE;
2449 cm_event.status = IW_CM_EVENT_STATUS_OK;
2450 cm_event.provider_data = cm_id->provider_data;
2451 cm_event.local_addr = cm_id->local_addr;
2452 cm_event.remote_addr = cm_id->remote_addr;
2453 cm_event.private_data = NULL;
2454 cm_event.private_data_len = 0;
2456 ret = cm_id->event_handler(cm_id, &cm_event);
2458 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2461 cm_id->rem_ref(cm_id);
2463 spin_lock_irqsave(&nesqp->lock, flags);
2464 if (nesqp->flush_issued == 0) {
2465 nesqp->flush_issued = 1;
2466 spin_unlock_irqrestore(&nesqp->lock, flags);
2467 flush_wqes(nesvnic->nesdev, nesqp,
2468 NES_CQP_FLUSH_RQ, 1);
2470 spin_unlock_irqrestore(&nesqp->lock, flags);
2472 cm_id = nesqp->cm_id;
2473 spin_unlock_irqrestore(&nesqp->lock, flags);
2474 /* check to see if the inbound reset beat the outbound reset */
2475 if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
2476 nes_debug(NES_DBG_CM, "QP%u: Decing refcount "
2477 "due to inbound reset beating the "
2478 "outbound reset.\n", nesqp->hwqp.qp_id);
2482 nesqp->disconn_pending = 0;
2483 spin_unlock_irqrestore(&nesqp->lock, flags);
2493 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2496 struct nes_vnic *nesvnic;
2497 struct nes_device *nesdev;
2499 nesvnic = to_nesvnic(nesqp->ibqp.device);
2503 nesdev = nesvnic->nesdev;
2505 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2506 atomic_read(&nesvnic->netdev->refcnt));
2508 if (nesqp->active_conn) {
2510 /* indicate this connection is NOT active */
2511 nesqp->active_conn = 0;
2513 /* Need to free the Last Streaming Mode Message */
2514 if (nesqp->ietf_frame) {
2515 pci_free_consistent(nesdev->pcidev,
2516 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2517 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2521 /* close the CM node down if it is still active */
2522 if (nesqp->cm_node) {
2523 nes_debug(NES_DBG_CM, "Call close API\n");
2525 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2535 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2539 struct nes_qp *nesqp;
2540 struct nes_vnic *nesvnic;
2541 struct nes_device *nesdev;
2542 struct nes_cm_node *cm_node;
2543 struct nes_adapter *adapter;
2544 struct ib_qp_attr attr;
2545 struct iw_cm_event cm_event;
2546 struct nes_hw_qp_wqe *wqe;
2547 struct nes_v4_quad nes_quad;
2551 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2555 /* get all our handles */
2556 nesqp = to_nesqp(ibqp);
2557 nesvnic = to_nesvnic(nesqp->ibqp.device);
2558 nesdev = nesvnic->nesdev;
2559 adapter = nesdev->nesadapter;
2561 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2562 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2563 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2564 nesvnic->netdev->name);
2566 /* associate the node with the QP */
2567 nesqp->cm_node = (void *)cm_node;
2568 cm_node->nesqp = nesqp;
2569 nes_add_ref(&nesqp->ibqp);
2571 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2572 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2573 atomic_inc(&cm_accepts);
2575 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2576 atomic_read(&nesvnic->netdev->refcnt));
2578 /* allocate the ietf frame and space for private data */
2579 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2580 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2581 &nesqp->ietf_frame_pbase);
2583 if (!nesqp->ietf_frame) {
2584 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2590 /* setup the MPA frame */
2591 nesqp->private_data_len = conn_param->private_data_len;
2592 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2594 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2595 conn_param->private_data_len);
2597 nesqp->ietf_frame->priv_data_len =
2598 cpu_to_be16(conn_param->private_data_len);
2599 nesqp->ietf_frame->rev = mpa_version;
2600 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2602 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2603 wqe = &nesqp->hwqp.sq_vbase[0];
2605 if (cm_id->remote_addr.sin_addr.s_addr !=
2606 cm_id->local_addr.sin_addr.s_addr) {
2607 u64temp = (unsigned long)nesqp;
2608 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2609 set_wqe_64bit_value(wqe->wqe_words,
2610 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2612 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2613 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2614 NES_IWARP_SQ_WQE_WRPDU);
2615 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2616 cpu_to_le32(conn_param->private_data_len +
2617 sizeof(struct ietf_mpa_frame));
2618 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
2619 cpu_to_le32((u32)nesqp->ietf_frame_pbase);
2620 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
2621 cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
2622 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2623 cpu_to_le32(conn_param->private_data_len +
2624 sizeof(struct ietf_mpa_frame));
2625 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2627 nesqp->nesqp_context->ird_ord_sizes |=
2628 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2629 NES_QPCONTEXT_ORDIRD_WRPDU);
2631 nesqp->nesqp_context->ird_ord_sizes |=
2632 cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2633 NES_QPCONTEXT_ORDIRD_WRPDU |
2634 NES_QPCONTEXT_ORDIRD_ALSMM));
2636 nesqp->skip_lsmm = 1;
2639 /* Cache the cm_id in the qp */
2640 nesqp->cm_id = cm_id;
2641 cm_node->cm_id = cm_id;
2643 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2644 cm_id->provider_data = nesqp;
2645 nesqp->active_conn = 0;
2647 if (cm_node->state == NES_CM_STATE_TSA)
2648 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2651 nes_cm_init_tsa_conn(nesqp, cm_node);
2653 nesqp->nesqp_context->tcpPorts[0] =
2654 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2655 nesqp->nesqp_context->tcpPorts[1] =
2656 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2658 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2659 nesqp->nesqp_context->ip0 =
2660 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2662 nesqp->nesqp_context->ip0 =
2663 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2665 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2666 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2667 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2669 nesqp->nesqp_context->arp_index_vlan |=
2670 cpu_to_le32(nes_arp_table(nesdev,
2671 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2672 NES_ARP_RESOLVE) << 16);
2674 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2675 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2677 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2679 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2680 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2681 nesqp->nesqp_context->ird_ord_sizes |=
2682 cpu_to_le32((u32)conn_param->ord);
2684 memset(&nes_quad, 0, sizeof(nes_quad));
2685 nes_quad.DstIpAdrIndex =
2686 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2687 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2688 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2690 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2691 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2692 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2694 /* Produce hash key */
2695 crc_value = get_crc_value(&nes_quad);
2696 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2697 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2698 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2700 nesqp->hte_index &= adapter->hte_index_mask;
2701 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2703 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2705 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2706 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2707 "private data length=%zu.\n", nesqp->hwqp.qp_id,
2708 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2709 ntohs(cm_id->remote_addr.sin_port),
2710 ntohl(cm_id->local_addr.sin_addr.s_addr),
2711 ntohs(cm_id->local_addr.sin_port),
2712 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2713 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2714 conn_param->private_data_len +
2715 sizeof(struct ietf_mpa_frame));
2717 attr.qp_state = IB_QPS_RTS;
2718 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2720 /* notify OF layer that accept event was successfull */
2721 cm_id->add_ref(cm_id);
2723 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2724 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2725 cm_event.provider_data = (void *)nesqp;
2726 cm_event.local_addr = cm_id->local_addr;
2727 cm_event.remote_addr = cm_id->remote_addr;
2728 cm_event.private_data = NULL;
2729 cm_event.private_data_len = 0;
2730 ret = cm_id->event_handler(cm_id, &cm_event);
2731 if (cm_node->loopbackpartner) {
2732 cm_node->loopbackpartner->mpa_frame_size =
2733 nesqp->private_data_len;
2734 /* copy entire MPA frame to our cm_node's frame */
2735 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2736 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2737 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2740 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2741 "ret=%d\n", __func__, __LINE__, ret);
2750 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2752 struct nes_cm_node *cm_node;
2753 struct nes_cm_core *cm_core;
2755 atomic_inc(&cm_rejects);
2756 cm_node = (struct nes_cm_node *) cm_id->provider_data;
2757 cm_core = cm_node->cm_core;
2758 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2760 strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
2761 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2763 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2764 cm_node->mpa_frame.rev = mpa_version;
2765 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2767 cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2775 * setup and launch cm connect node
2777 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2780 struct nes_qp *nesqp;
2781 struct nes_vnic *nesvnic;
2782 struct nes_device *nesdev;
2783 struct nes_cm_node *cm_node;
2784 struct nes_cm_info cm_info;
2786 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2789 nesqp = to_nesqp(ibqp);
2792 nesvnic = to_nesvnic(nesqp->ibqp.device);
2795 nesdev = nesvnic->nesdev;
2799 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
2800 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
2801 ntohl(nesvnic->local_ipaddr),
2802 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2803 ntohs(cm_id->remote_addr.sin_port),
2804 ntohl(cm_id->local_addr.sin_addr.s_addr),
2805 ntohs(cm_id->local_addr.sin_port));
2807 atomic_inc(&cm_connects);
2808 nesqp->active_conn = 1;
2810 /* cache the cm_id in the qp */
2811 nesqp->cm_id = cm_id;
2813 cm_id->provider_data = nesqp;
2815 nesqp->private_data_len = conn_param->private_data_len;
2816 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2817 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
2818 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
2819 conn_param->private_data_len);
2821 if (cm_id->local_addr.sin_addr.s_addr !=
2822 cm_id->remote_addr.sin_addr.s_addr)
2823 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2824 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2826 /* set up the connection params for the node */
2827 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
2828 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
2829 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
2830 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
2831 cm_info.cm_id = cm_id;
2832 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2834 cm_id->add_ref(cm_id);
2836 /* create a connect CM node connection */
2837 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
2838 conn_param->private_data_len, (void *)conn_param->private_data,
2841 if (cm_id->local_addr.sin_addr.s_addr !=
2842 cm_id->remote_addr.sin_addr.s_addr)
2843 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2844 PCI_FUNC(nesdev->pcidev->devfn),
2845 NES_MANAGE_APBVT_DEL);
2847 cm_id->rem_ref(cm_id);
2851 cm_node->apbvt_set = 1;
2852 nesqp->cm_node = cm_node;
2853 cm_node->nesqp = nesqp;
2854 nes_add_ref(&nesqp->ibqp);
2863 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
2865 struct nes_vnic *nesvnic;
2866 struct nes_cm_listener *cm_node;
2867 struct nes_cm_info cm_info;
2868 struct nes_adapter *adapter;
2872 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
2873 cm_id, ntohs(cm_id->local_addr.sin_port));
2875 nesvnic = to_nesvnic(cm_id->device);
2878 adapter = nesvnic->nesdev->nesadapter;
2879 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2880 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2882 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
2883 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
2885 /* setup listen params in our api call struct */
2886 cm_info.loc_addr = nesvnic->local_ipaddr;
2887 cm_info.loc_port = cm_id->local_addr.sin_port;
2888 cm_info.backlog = backlog;
2889 cm_info.cm_id = cm_id;
2891 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2894 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
2896 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
2897 __func__, __LINE__);
2901 cm_id->provider_data = cm_node;
2903 if (!cm_node->reused_node) {
2904 err = nes_manage_apbvt(nesvnic,
2905 ntohs(cm_id->local_addr.sin_port),
2906 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
2907 NES_MANAGE_APBVT_ADD);
2909 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
2911 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
2914 cm_listens_created++;
2917 cm_id->add_ref(cm_id);
2918 cm_id->provider_data = (void *)cm_node;
2926 * nes_destroy_listen
2928 int nes_destroy_listen(struct iw_cm_id *cm_id)
2930 if (cm_id->provider_data)
2931 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
2933 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
2935 cm_id->rem_ref(cm_id);
2944 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
2946 cm_packets_received++;
2947 if ((g_cm_core) && (g_cm_core->api)) {
2948 g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
2950 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
2951 " cm is not setup properly.\n");
2960 * Start and init a cm core module
2962 int nes_cm_start(void)
2964 nes_debug(NES_DBG_CM, "\n");
2965 /* create the primary CM core, pass this handle to subsequent core inits */
2966 g_cm_core = nes_cm_alloc_core();
2977 * stop and dealloc all cm core instances
2979 int nes_cm_stop(void)
2981 g_cm_core->api->destroy_cm_core(g_cm_core);
2987 * cm_event_connected
2988 * handle a connected event, setup QPs and HW
2990 static void cm_event_connected(struct nes_cm_event *event)
2993 struct nes_qp *nesqp;
2994 struct nes_vnic *nesvnic;
2995 struct nes_device *nesdev;
2996 struct nes_cm_node *cm_node;
2997 struct nes_adapter *nesadapter;
2998 struct ib_qp_attr attr;
2999 struct iw_cm_id *cm_id;
3000 struct iw_cm_event cm_event;
3001 struct nes_hw_qp_wqe *wqe;
3002 struct nes_v4_quad nes_quad;
3006 /* get all our handles */
3007 cm_node = event->cm_node;
3008 cm_id = cm_node->cm_id;
3009 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3010 nesqp = (struct nes_qp *)cm_id->provider_data;
3011 nesvnic = to_nesvnic(nesqp->ibqp.device);
3012 nesdev = nesvnic->nesdev;
3013 nesadapter = nesdev->nesadapter;
3015 if (nesqp->destroyed) {
3018 atomic_inc(&cm_connecteds);
3019 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3020 " local port 0x%04X. jiffies = %lu.\n",
3022 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3023 ntohs(cm_id->remote_addr.sin_port),
3024 ntohs(cm_id->local_addr.sin_port),
3027 nes_cm_init_tsa_conn(nesqp, cm_node);
3029 /* set the QP tsa context */
3030 nesqp->nesqp_context->tcpPorts[0] =
3031 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3032 nesqp->nesqp_context->tcpPorts[1] =
3033 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3034 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3035 nesqp->nesqp_context->ip0 =
3036 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3038 nesqp->nesqp_context->ip0 =
3039 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3041 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3042 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3043 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3044 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3045 nes_arp_table(nesdev,
3046 le32_to_cpu(nesqp->nesqp_context->ip0),
3047 NULL, NES_ARP_RESOLVE) << 16);
3048 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3049 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3050 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3051 nesqp->nesqp_context->ird_ord_sizes |=
3052 cpu_to_le32((u32)1 <<
3053 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3055 /* Adjust tail for not having a LSMM */
3056 nesqp->hwqp.sq_tail = 1;
3058 #if defined(NES_SEND_FIRST_WRITE)
3059 if (cm_node->send_write0) {
3060 nes_debug(NES_DBG_CM, "Sending first write.\n");
3061 wqe = &nesqp->hwqp.sq_vbase[0];
3062 u64temp = (unsigned long)nesqp;
3063 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3064 set_wqe_64bit_value(wqe->wqe_words,
3065 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3066 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3067 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3068 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3069 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3070 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3071 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3072 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3074 /* use the reserved spot on the WQ for the extra first WQE */
3075 nesqp->nesqp_context->ird_ord_sizes &=
3076 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3077 NES_QPCONTEXT_ORDIRD_WRPDU |
3078 NES_QPCONTEXT_ORDIRD_ALSMM));
3079 nesqp->skip_lsmm = 1;
3080 nesqp->hwqp.sq_tail = 0;
3081 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3082 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3086 memset(&nes_quad, 0, sizeof(nes_quad));
3088 nes_quad.DstIpAdrIndex =
3089 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3090 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3091 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3093 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3094 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3095 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3097 /* Produce hash key */
3098 crc_value = get_crc_value(&nes_quad);
3099 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3100 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3101 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3103 nesqp->hte_index &= nesadapter->hte_index_mask;
3104 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3106 nesqp->ietf_frame = &cm_node->mpa_frame;
3107 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3108 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3110 /* notify OF layer we successfully created the requested connection */
3111 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3112 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3113 cm_event.provider_data = cm_id->provider_data;
3114 cm_event.local_addr.sin_family = AF_INET;
3115 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3116 cm_event.remote_addr = cm_id->remote_addr;
3118 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3119 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3121 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3122 ret = cm_id->event_handler(cm_id, &cm_event);
3123 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3126 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3127 "ret=%d\n", __func__, __LINE__, ret);
3128 attr.qp_state = IB_QPS_RTS;
3129 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3131 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3132 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3139 * cm_event_connect_error
3141 static void cm_event_connect_error(struct nes_cm_event *event)
3143 struct nes_qp *nesqp;
3144 struct iw_cm_id *cm_id;
3145 struct iw_cm_event cm_event;
3146 /* struct nes_cm_info cm_info; */
3149 if (!event->cm_node)
3152 cm_id = event->cm_node->cm_id;
3157 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3158 nesqp = cm_id->provider_data;
3164 /* notify OF layer about this connection error event */
3165 /* cm_id->rem_ref(cm_id); */
3166 nesqp->cm_id = NULL;
3167 cm_id->provider_data = NULL;
3168 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3169 cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
3170 cm_event.provider_data = cm_id->provider_data;
3171 cm_event.local_addr = cm_id->local_addr;
3172 cm_event.remote_addr = cm_id->remote_addr;
3173 cm_event.private_data = NULL;
3174 cm_event.private_data_len = 0;
3176 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3177 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3178 cm_event.remote_addr.sin_addr.s_addr);
3180 ret = cm_id->event_handler(cm_id, &cm_event);
3181 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3183 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3184 "ret=%d\n", __func__, __LINE__, ret);
3185 cm_id->rem_ref(cm_id);
3187 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3195 static void cm_event_reset(struct nes_cm_event *event)
3197 struct nes_qp *nesqp;
3198 struct iw_cm_id *cm_id;
3199 struct iw_cm_event cm_event;
3200 /* struct nes_cm_info cm_info; */
3203 if (!event->cm_node)
3206 if (!event->cm_node->cm_id)
3209 cm_id = event->cm_node->cm_id;
3211 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3212 nesqp = cm_id->provider_data;
3214 nesqp->cm_id = NULL;
3215 /* cm_id->provider_data = NULL; */
3216 cm_event.event = IW_CM_EVENT_DISCONNECT;
3217 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3218 cm_event.provider_data = cm_id->provider_data;
3219 cm_event.local_addr = cm_id->local_addr;
3220 cm_event.remote_addr = cm_id->remote_addr;
3221 cm_event.private_data = NULL;
3222 cm_event.private_data_len = 0;
3224 ret = cm_id->event_handler(cm_id, &cm_event);
3225 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3228 /* notify OF layer about this connection error event */
3229 cm_id->rem_ref(cm_id);
3238 static void cm_event_mpa_req(struct nes_cm_event *event)
3240 struct iw_cm_id *cm_id;
3241 struct iw_cm_event cm_event;
3243 struct nes_cm_node *cm_node;
3245 cm_node = event->cm_node;
3248 cm_id = cm_node->cm_id;
3250 atomic_inc(&cm_connect_reqs);
3251 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3252 cm_node, cm_id, jiffies);
3254 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3255 cm_event.status = IW_CM_EVENT_STATUS_OK;
3256 cm_event.provider_data = (void *)cm_node;
3258 cm_event.local_addr.sin_family = AF_INET;
3259 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3260 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3262 cm_event.remote_addr.sin_family = AF_INET;
3263 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3264 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3266 cm_event.private_data = cm_node->mpa_frame_buf;
3267 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3269 ret = cm_id->event_handler(cm_id, &cm_event);
3271 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
3272 __func__, __LINE__, ret);
3278 static void nes_cm_event_handler(struct work_struct *);
3282 * post an event to the cm event handler
3284 static int nes_cm_post_event(struct nes_cm_event *event)
3286 atomic_inc(&event->cm_node->cm_core->events_posted);
3287 add_ref_cm_node(event->cm_node);
3288 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3289 INIT_WORK(&event->event_work, nes_cm_event_handler);
3290 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3291 event->cm_node, event);
3293 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3295 nes_debug(NES_DBG_CM, "Exit\n");
3301 * nes_cm_event_handler
3302 * worker function to handle cm events
3303 * will free instance of nes_cm_event
3305 static void nes_cm_event_handler(struct work_struct *work)
3307 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3309 struct nes_cm_core *cm_core;
3311 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3314 cm_core = event->cm_node->cm_core;
3315 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3316 event, event->type, atomic_read(&cm_core->events_posted));
3318 switch (event->type) {
3319 case NES_CM_EVENT_MPA_REQ:
3320 cm_event_mpa_req(event);
3321 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3324 case NES_CM_EVENT_RESET:
3325 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3327 cm_event_reset(event);
3329 case NES_CM_EVENT_CONNECTED:
3330 if ((!event->cm_node->cm_id) ||
3331 (event->cm_node->state != NES_CM_STATE_TSA))
3333 cm_event_connected(event);
3334 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3336 case NES_CM_EVENT_ABORTED:
3337 if ((!event->cm_node->cm_id) ||
3338 (event->cm_node->state == NES_CM_STATE_TSA))
3340 cm_event_connect_error(event);
3341 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3343 case NES_CM_EVENT_DROPPED_PKT:
3344 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3347 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3351 atomic_dec(&cm_core->events_posted);
3352 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3353 rem_ref_cm_node(cm_core, event->cm_node);