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: %pI4:%x from core %p->%p\n",
827 &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 %pI4:%x\n",
877 &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;
1031 memset(&fl, 0, sizeof fl);
1032 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1033 if (ip_route_output_key(&init_net, &rt, &fl)) {
1034 printk("%s: ip_route_output_key failed for 0x%08X\n",
1039 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1041 if (neigh->nud_state & NUD_VALID) {
1042 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1043 " is %pM, Gateway is 0x%08X \n", dst_ip,
1044 neigh->ha, ntohl(rt->rt_gateway));
1045 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1046 dst_ip, NES_ARP_ADD);
1047 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1050 neigh_release(neigh);
1053 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1054 neigh_event_send(rt->u.dst.neighbour, NULL);
1062 * make_cm_node - create a new instance of a cm node
1064 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1065 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1066 struct nes_cm_listener *listener)
1068 struct nes_cm_node *cm_node;
1071 struct nes_device *nesdev;
1072 struct nes_adapter *nesadapter;
1074 /* create an hte and cm_node for this instance */
1075 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1079 /* set our node specific transport info */
1080 cm_node->loc_addr = cm_info->loc_addr;
1081 cm_node->rem_addr = cm_info->rem_addr;
1082 cm_node->loc_port = cm_info->loc_port;
1083 cm_node->rem_port = cm_info->rem_port;
1084 cm_node->send_write0 = send_first;
1085 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1086 &cm_node->loc_addr, cm_node->loc_port,
1087 &cm_node->rem_addr, cm_node->rem_port);
1088 cm_node->listener = listener;
1089 cm_node->netdev = nesvnic->netdev;
1090 cm_node->cm_id = cm_info->cm_id;
1091 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1093 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1096 spin_lock_init(&cm_node->retrans_list_lock);
1097 INIT_LIST_HEAD(&cm_node->recv_list);
1098 spin_lock_init(&cm_node->recv_list_lock);
1100 cm_node->loopbackpartner = NULL;
1101 atomic_set(&cm_node->ref_count, 1);
1102 /* associate our parent CM core */
1103 cm_node->cm_core = cm_core;
1104 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1105 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1106 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1107 NES_CM_DEFAULT_RCV_WND_SCALE;
1108 ts = current_kernel_time();
1109 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1110 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1111 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1112 cm_node->tcp_cntxt.rcv_nxt = 0;
1113 /* get a unique session ID , add thread_id to an upcounter to handle race */
1114 atomic_inc(&cm_core->node_cnt);
1115 cm_node->conn_type = cm_info->conn_type;
1116 cm_node->apbvt_set = 0;
1117 cm_node->accept_pend = 0;
1119 cm_node->nesvnic = nesvnic;
1120 /* get some device handles, for arp lookup */
1121 nesdev = nesvnic->nesdev;
1122 nesadapter = nesdev->nesadapter;
1124 cm_node->loopbackpartner = NULL;
1125 /* get the mac addr for the remote node */
1126 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1128 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1135 /* copy the mac addr to node context */
1136 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1137 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1140 add_hte_node(cm_core, cm_node);
1141 atomic_inc(&cm_nodes_created);
1148 * add_ref_cm_node - destroy an instance of a cm node
1150 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1152 atomic_inc(&cm_node->ref_count);
1158 * rem_ref_cm_node - destroy an instance of a cm node
1160 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1161 struct nes_cm_node *cm_node)
1163 unsigned long flags, qplockflags;
1164 struct nes_timer_entry *recv_entry;
1165 struct iw_cm_id *cm_id;
1166 struct list_head *list_core, *list_node_temp;
1167 struct nes_qp *nesqp;
1172 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1173 if (atomic_dec_return(&cm_node->ref_count)) {
1174 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1177 list_del(&cm_node->list);
1178 atomic_dec(&cm_core->ht_node_cnt);
1179 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1181 /* if the node is destroyed before connection was accelerated */
1182 if (!cm_node->accelerated && cm_node->accept_pend) {
1183 BUG_ON(!cm_node->listener);
1184 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1185 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1187 BUG_ON(cm_node->send_entry);
1188 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1189 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
1190 recv_entry = container_of(list_core, struct nes_timer_entry,
1192 list_del(&recv_entry->list);
1193 cm_id = cm_node->cm_id;
1194 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1195 nesqp = (struct nes_qp *)recv_entry->skb;
1196 spin_lock_irqsave(&nesqp->lock, qplockflags);
1198 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1199 "NES_TIMER_TYPE_CLOSE with something to do!\n",
1200 nesqp->hwqp.qp_id, cm_id);
1201 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1202 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1203 nesqp->ibqp_state = IB_QPS_ERR;
1204 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1205 nes_cm_disconn(nesqp);
1207 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1208 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1209 "NES_TIMER_TYPE_CLOSE with nothing to do!\n",
1210 nesqp->hwqp.qp_id, cm_id);
1212 cm_id->rem_ref(cm_id);
1215 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1217 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1219 if (cm_node->listener) {
1220 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1222 if (cm_node->apbvt_set && cm_node->nesvnic) {
1223 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1225 cm_node->nesvnic->nesdev->pcidev->devfn),
1226 NES_MANAGE_APBVT_DEL);
1230 atomic_dec(&cm_core->node_cnt);
1231 atomic_inc(&cm_nodes_destroyed);
1232 nesqp = cm_node->nesqp;
1234 nesqp->cm_node = NULL;
1235 nes_rem_ref(&nesqp->ibqp);
1236 cm_node->nesqp = NULL;
1247 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1248 u32 optionsize, u32 syn_packet)
1252 union all_known_options *all_options;
1253 char got_mss_option = 0;
1255 while (offset < optionsize) {
1256 all_options = (union all_known_options *)(optionsloc + offset);
1257 switch (all_options->as_base.optionnum) {
1258 case OPTION_NUMBER_END:
1259 offset = optionsize;
1261 case OPTION_NUMBER_NONE:
1264 case OPTION_NUMBER_MSS:
1265 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1266 "Size: %d\n", __func__,
1267 all_options->as_mss.length, offset, optionsize);
1269 if (all_options->as_mss.length != 4) {
1272 tmp = ntohs(all_options->as_mss.mss);
1273 if (tmp > 0 && tmp <
1274 cm_node->tcp_cntxt.mss)
1275 cm_node->tcp_cntxt.mss = tmp;
1278 case OPTION_NUMBER_WINDOW_SCALE:
1279 cm_node->tcp_cntxt.snd_wscale =
1280 all_options->as_windowscale.shiftcount;
1282 case OPTION_NUMBER_WRITE0:
1283 cm_node->send_write0 = 1;
1286 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1287 all_options->as_base.optionnum);
1290 offset += all_options->as_base.length;
1292 if ((!got_mss_option) && (syn_packet))
1293 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1297 static void drop_packet(struct sk_buff *skb)
1299 atomic_inc(&cm_accel_dropped_pkts);
1300 dev_kfree_skb_any(skb);
1303 static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1304 struct tcphdr *tcph)
1306 atomic_inc(&cm_resets_recvd);
1307 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1308 "refcnt=%d\n", cm_node, cm_node->state,
1309 atomic_read(&cm_node->ref_count));
1310 cm_node->tcp_cntxt.rcv_nxt++;
1311 cleanup_retrans_entry(cm_node);
1312 switch (cm_node->state) {
1313 case NES_CM_STATE_SYN_RCVD:
1314 case NES_CM_STATE_SYN_SENT:
1315 case NES_CM_STATE_ESTABLISHED:
1316 case NES_CM_STATE_MPAREQ_SENT:
1317 cm_node->state = NES_CM_STATE_LAST_ACK;
1318 send_fin(cm_node, skb);
1320 case NES_CM_STATE_FIN_WAIT1:
1321 cm_node->state = NES_CM_STATE_CLOSING;
1322 send_ack(cm_node, skb);
1324 case NES_CM_STATE_FIN_WAIT2:
1325 cm_node->state = NES_CM_STATE_TIME_WAIT;
1326 send_ack(cm_node, skb);
1327 cm_node->state = NES_CM_STATE_CLOSED;
1329 case NES_CM_STATE_TSA:
1331 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1332 cm_node, cm_node->state);
1339 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1340 struct tcphdr *tcph)
1343 int reset = 0; /* whether to send reset in case of err.. */
1344 atomic_inc(&cm_resets_recvd);
1345 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1346 " refcnt=%d\n", cm_node, cm_node->state,
1347 atomic_read(&cm_node->ref_count));
1348 cleanup_retrans_entry(cm_node);
1349 switch (cm_node->state) {
1350 case NES_CM_STATE_SYN_SENT:
1351 case NES_CM_STATE_MPAREQ_SENT:
1352 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1353 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1354 cm_node->listener, cm_node->state);
1355 active_open_err(cm_node, skb, reset);
1357 /* For PASSIVE open states, remove the cm_node event */
1358 case NES_CM_STATE_ESTABLISHED:
1359 case NES_CM_STATE_SYN_RCVD:
1360 case NES_CM_STATE_LISTENING:
1361 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1362 passive_open_err(cm_node, skb, reset);
1364 case NES_CM_STATE_TSA:
1370 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb,
1371 enum nes_cm_event_type type)
1375 int datasize = skb->len;
1376 u8 *dataloc = skb->data;
1377 ret = parse_mpa(cm_node, dataloc, datasize);
1379 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1380 if (type == NES_CM_EVENT_CONNECTED) {
1381 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1382 "cm_node=%p listener=%p state=%d\n", __func__,
1383 __LINE__, cm_node, cm_node->listener,
1385 active_open_err(cm_node, skb, 1);
1387 passive_open_err(cm_node, skb, 1);
1390 cleanup_retrans_entry(cm_node);
1391 dev_kfree_skb_any(skb);
1392 if (type == NES_CM_EVENT_CONNECTED)
1393 cm_node->state = NES_CM_STATE_TSA;
1394 create_event(cm_node, type);
1400 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1402 switch (cm_node->state) {
1403 case NES_CM_STATE_SYN_SENT:
1404 case NES_CM_STATE_MPAREQ_SENT:
1405 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1406 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1407 cm_node->listener, cm_node->state);
1408 active_open_err(cm_node, skb, 1);
1410 case NES_CM_STATE_ESTABLISHED:
1411 case NES_CM_STATE_SYN_RCVD:
1412 passive_open_err(cm_node, skb, 1);
1414 case NES_CM_STATE_TSA:
1420 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1421 struct sk_buff *skb)
1425 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1427 active_open_err(cm_node, skb, 1);
1432 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1433 struct sk_buff *skb)
1438 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1439 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1441 seq = ntohl(tcph->seq);
1442 ack_seq = ntohl(tcph->ack_seq);
1443 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1444 if (ack_seq != loc_seq_num)
1446 else if ((seq + rcv_wnd) < rcv_nxt)
1449 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1450 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1451 cm_node->listener, cm_node->state);
1452 indicate_pkt_err(cm_node, skb);
1453 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1454 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1461 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1462 * is created with a listener or it may comein as rexmitted packet which in
1463 * that case will be just dropped.
1466 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1467 struct tcphdr *tcph)
1473 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1474 skb_pull(skb, tcph->doff << 2);
1475 inc_sequence = ntohl(tcph->seq);
1477 switch (cm_node->state) {
1478 case NES_CM_STATE_SYN_SENT:
1479 case NES_CM_STATE_MPAREQ_SENT:
1480 /* Rcvd syn on active open connection*/
1481 active_open_err(cm_node, skb, 1);
1483 case NES_CM_STATE_LISTENING:
1485 cm_node->accept_pend = 1;
1486 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1487 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1488 cm_node->listener->backlog) {
1489 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1492 passive_open_err(cm_node, skb, 0);
1495 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1498 passive_open_err(cm_node, skb, 0);
1502 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1503 BUG_ON(cm_node->send_entry);
1504 cm_node->state = NES_CM_STATE_SYN_RCVD;
1505 send_syn(cm_node, 1, skb);
1507 case NES_CM_STATE_TSA:
1508 case NES_CM_STATE_ESTABLISHED:
1509 case NES_CM_STATE_FIN_WAIT1:
1510 case NES_CM_STATE_FIN_WAIT2:
1511 case NES_CM_STATE_MPAREQ_RCVD:
1512 case NES_CM_STATE_LAST_ACK:
1513 case NES_CM_STATE_CLOSING:
1514 case NES_CM_STATE_UNKNOWN:
1515 case NES_CM_STATE_CLOSED:
1522 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1523 struct tcphdr *tcph)
1530 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1531 skb_pull(skb, tcph->doff << 2);
1532 inc_sequence = ntohl(tcph->seq);
1533 switch (cm_node->state) {
1534 case NES_CM_STATE_SYN_SENT:
1536 if (check_syn(cm_node, tcph, skb))
1538 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1540 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1542 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1546 cleanup_retrans_entry(cm_node);
1547 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1548 send_mpa_request(cm_node, skb);
1549 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1551 case NES_CM_STATE_MPAREQ_RCVD:
1552 /* passive open, so should not be here */
1553 passive_open_err(cm_node, skb, 1);
1555 case NES_CM_STATE_ESTABLISHED:
1556 case NES_CM_STATE_FIN_WAIT1:
1557 case NES_CM_STATE_FIN_WAIT2:
1558 case NES_CM_STATE_LAST_ACK:
1559 case NES_CM_STATE_TSA:
1560 case NES_CM_STATE_CLOSING:
1561 case NES_CM_STATE_UNKNOWN:
1562 case NES_CM_STATE_CLOSED:
1563 case NES_CM_STATE_MPAREQ_SENT:
1570 static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1571 struct tcphdr *tcph)
1577 if (check_seq(cm_node, tcph, skb))
1580 skb_pull(skb, tcph->doff << 2);
1581 inc_sequence = ntohl(tcph->seq);
1582 rem_seq = ntohl(tcph->seq);
1583 rem_seq_ack = ntohl(tcph->ack_seq);
1584 datasize = skb->len;
1586 switch (cm_node->state) {
1587 case NES_CM_STATE_SYN_RCVD:
1589 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1590 cm_node->state = NES_CM_STATE_ESTABLISHED;
1592 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1593 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1594 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ);
1595 } else { /* rcvd ACK only */
1596 dev_kfree_skb_any(skb);
1597 cleanup_retrans_entry(cm_node);
1600 case NES_CM_STATE_ESTABLISHED:
1602 /* We expect mpa frame to be received only */
1604 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1605 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1606 handle_rcv_mpa(cm_node, skb,
1607 NES_CM_EVENT_MPA_REQ);
1611 case NES_CM_STATE_MPAREQ_SENT:
1612 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1614 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1615 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED);
1616 } else { /* Could be just an ack pkt.. */
1617 cleanup_retrans_entry(cm_node);
1618 dev_kfree_skb_any(skb);
1621 case NES_CM_STATE_FIN_WAIT1:
1622 case NES_CM_STATE_SYN_SENT:
1623 case NES_CM_STATE_FIN_WAIT2:
1624 case NES_CM_STATE_TSA:
1625 case NES_CM_STATE_CLOSED:
1626 case NES_CM_STATE_MPAREQ_RCVD:
1627 case NES_CM_STATE_LAST_ACK:
1628 case NES_CM_STATE_CLOSING:
1629 case NES_CM_STATE_UNKNOWN:
1638 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1639 struct sk_buff *skb, int optionsize, int passive)
1641 u8 *optionsloc = (u8 *)&tcph[1];
1643 if (process_options(cm_node, optionsloc, optionsize,
1645 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1648 passive_open_err(cm_node, skb, 0);
1650 active_open_err(cm_node, skb, 0);
1655 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1656 cm_node->tcp_cntxt.snd_wscale;
1658 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1659 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1664 * active_open_err() will send reset() if flag set..
1665 * It will also send ABORT event.
1668 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1671 cleanup_retrans_entry(cm_node);
1673 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1674 "state=%d\n", cm_node, cm_node->state);
1675 add_ref_cm_node(cm_node);
1676 send_reset(cm_node, skb);
1678 dev_kfree_skb_any(skb);
1680 cm_node->state = NES_CM_STATE_CLOSED;
1681 create_event(cm_node, NES_CM_EVENT_ABORTED);
1685 * passive_open_err() will either do a reset() or will free up the skb and
1686 * remove the cm_node.
1689 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1692 cleanup_retrans_entry(cm_node);
1693 cm_node->state = NES_CM_STATE_CLOSED;
1695 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1696 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1697 send_reset(cm_node, skb);
1699 dev_kfree_skb_any(skb);
1700 rem_ref_cm_node(cm_node->cm_core, cm_node);
1705 * free_retrans_entry() routines assumes that the retrans_list_lock has
1706 * been acquired before calling.
1708 static void free_retrans_entry(struct nes_cm_node *cm_node)
1710 struct nes_timer_entry *send_entry;
1711 send_entry = cm_node->send_entry;
1713 cm_node->send_entry = NULL;
1714 dev_kfree_skb_any(send_entry->skb);
1716 rem_ref_cm_node(cm_node->cm_core, cm_node);
1720 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1722 unsigned long flags;
1724 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1725 free_retrans_entry(cm_node);
1726 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1731 * Returns skb if to be freed, else it will return NULL if already used..
1733 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1734 struct nes_cm_core *cm_core)
1736 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1737 struct tcphdr *tcph = tcp_hdr(skb);
1738 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1740 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1741 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1742 tcph->ack, tcph->rst, tcph->fin);
1745 pkt_type = NES_PKT_TYPE_RST;
1746 else if (tcph->syn) {
1747 pkt_type = NES_PKT_TYPE_SYN;
1749 pkt_type = NES_PKT_TYPE_SYNACK;
1750 } else if (tcph->fin)
1751 pkt_type = NES_PKT_TYPE_FIN;
1753 pkt_type = NES_PKT_TYPE_ACK;
1756 case NES_PKT_TYPE_SYN:
1757 handle_syn_pkt(cm_node, skb, tcph);
1759 case NES_PKT_TYPE_SYNACK:
1760 handle_synack_pkt(cm_node, skb, tcph);
1762 case NES_PKT_TYPE_ACK:
1763 handle_ack_pkt(cm_node, skb, tcph);
1765 case NES_PKT_TYPE_RST:
1766 handle_rst_pkt(cm_node, skb, tcph);
1768 case NES_PKT_TYPE_FIN:
1769 handle_fin_pkt(cm_node, skb, tcph);
1778 * mini_cm_listen - create a listen node with params
1780 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1781 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1783 struct nes_cm_listener *listener;
1784 unsigned long flags;
1786 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1787 cm_info->loc_addr, cm_info->loc_port);
1789 /* cannot have multiple matching listeners */
1790 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1791 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1792 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1793 /* find automatically incs ref count ??? */
1794 atomic_dec(&listener->ref_count);
1795 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1800 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1801 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1803 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1807 listener->loc_addr = htonl(cm_info->loc_addr);
1808 listener->loc_port = htons(cm_info->loc_port);
1809 listener->reused_node = 0;
1811 atomic_set(&listener->ref_count, 1);
1814 /* find already inc'ed the ref count */
1816 listener->reused_node = 1;
1819 listener->cm_id = cm_info->cm_id;
1820 atomic_set(&listener->pend_accepts_cnt, 0);
1821 listener->cm_core = cm_core;
1822 listener->nesvnic = nesvnic;
1823 atomic_inc(&cm_core->node_cnt);
1825 listener->conn_type = cm_info->conn_type;
1826 listener->backlog = cm_info->backlog;
1827 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1829 if (!listener->reused_node) {
1830 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1831 list_add(&listener->list, &cm_core->listen_list.list);
1832 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1833 atomic_inc(&cm_core->listen_node_cnt);
1836 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1837 " listener = %p, backlog = %d, cm_id = %p.\n",
1838 cm_info->loc_addr, cm_info->loc_port,
1839 listener, listener->backlog, listener->cm_id);
1846 * mini_cm_connect - make a connection node with params
1848 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1849 struct nes_vnic *nesvnic, u16 private_data_len,
1850 void *private_data, struct nes_cm_info *cm_info)
1853 struct nes_cm_node *cm_node;
1854 struct nes_cm_listener *loopbackremotelistener;
1855 struct nes_cm_node *loopbackremotenode;
1856 struct nes_cm_info loopback_cm_info;
1857 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
1858 struct ietf_mpa_frame *mpa_frame = NULL;
1860 /* create a CM connection node */
1861 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1864 mpa_frame = &cm_node->mpa_frame;
1865 strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ);
1866 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
1867 mpa_frame->rev = IETF_MPA_VERSION;
1868 mpa_frame->priv_data_len = htons(private_data_len);
1870 /* set our node side to client (active) side */
1871 cm_node->tcp_cntxt.client = 1;
1872 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1874 if (cm_info->loc_addr == cm_info->rem_addr) {
1875 loopbackremotelistener = find_listener(cm_core,
1876 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
1877 NES_CM_LISTENER_ACTIVE_STATE);
1878 if (loopbackremotelistener == NULL) {
1879 create_event(cm_node, NES_CM_EVENT_ABORTED);
1881 atomic_inc(&cm_loopbacks);
1882 loopback_cm_info = *cm_info;
1883 loopback_cm_info.loc_port = cm_info->rem_port;
1884 loopback_cm_info.rem_port = cm_info->loc_port;
1885 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
1886 loopbackremotenode = make_cm_node(cm_core, nesvnic,
1887 &loopback_cm_info, loopbackremotelistener);
1888 loopbackremotenode->loopbackpartner = cm_node;
1889 loopbackremotenode->tcp_cntxt.rcv_wscale =
1890 NES_CM_DEFAULT_RCV_WND_SCALE;
1891 cm_node->loopbackpartner = loopbackremotenode;
1892 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
1894 loopbackremotenode->mpa_frame_size = private_data_len;
1896 /* we are done handling this state. */
1897 /* set node to a TSA state */
1898 cm_node->state = NES_CM_STATE_TSA;
1899 cm_node->tcp_cntxt.rcv_nxt =
1900 loopbackremotenode->tcp_cntxt.loc_seq_num;
1901 loopbackremotenode->tcp_cntxt.rcv_nxt =
1902 cm_node->tcp_cntxt.loc_seq_num;
1903 cm_node->tcp_cntxt.max_snd_wnd =
1904 loopbackremotenode->tcp_cntxt.rcv_wnd;
1905 loopbackremotenode->tcp_cntxt.max_snd_wnd =
1906 cm_node->tcp_cntxt.rcv_wnd;
1907 cm_node->tcp_cntxt.snd_wnd =
1908 loopbackremotenode->tcp_cntxt.rcv_wnd;
1909 loopbackremotenode->tcp_cntxt.snd_wnd =
1910 cm_node->tcp_cntxt.rcv_wnd;
1911 cm_node->tcp_cntxt.snd_wscale =
1912 loopbackremotenode->tcp_cntxt.rcv_wscale;
1913 loopbackremotenode->tcp_cntxt.snd_wscale =
1914 cm_node->tcp_cntxt.rcv_wscale;
1916 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1921 /* set our node side to client (active) side */
1922 cm_node->tcp_cntxt.client = 1;
1923 /* init our MPA frame ptr */
1924 memcpy(mpa_frame->priv_data, private_data, private_data_len);
1926 cm_node->mpa_frame_size = mpa_frame_size;
1928 /* send a syn and goto syn sent state */
1929 cm_node->state = NES_CM_STATE_SYN_SENT;
1930 ret = send_syn(cm_node, 0, NULL);
1933 /* error in sending the syn free up the cm_node struct */
1934 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
1935 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
1936 cm_node->rem_addr, cm_node->rem_port, cm_node,
1938 rem_ref_cm_node(cm_node->cm_core, cm_node);
1943 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
1944 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
1945 cm_node->rem_addr, cm_node->rem_port, cm_node,
1953 * mini_cm_accept - accept a connection
1954 * This function is never called
1956 static int mini_cm_accept(struct nes_cm_core *cm_core,
1957 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
1964 * mini_cm_reject - reject and teardown a connection
1966 static int mini_cm_reject(struct nes_cm_core *cm_core,
1967 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
1971 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
1972 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
1974 if (cm_node->tcp_cntxt.client)
1976 cleanup_retrans_entry(cm_node);
1977 cm_node->state = NES_CM_STATE_CLOSED;
1979 ret = send_reset(cm_node, NULL);
1987 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1991 if (!cm_core || !cm_node)
1994 switch (cm_node->state) {
1995 case NES_CM_STATE_SYN_RCVD:
1996 case NES_CM_STATE_SYN_SENT:
1997 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1998 case NES_CM_STATE_ESTABLISHED:
1999 case NES_CM_STATE_ACCEPTING:
2000 case NES_CM_STATE_MPAREQ_SENT:
2001 case NES_CM_STATE_MPAREQ_RCVD:
2002 cleanup_retrans_entry(cm_node);
2003 send_reset(cm_node, NULL);
2005 case NES_CM_STATE_CLOSE_WAIT:
2006 cm_node->state = NES_CM_STATE_LAST_ACK;
2007 send_fin(cm_node, NULL);
2009 case NES_CM_STATE_FIN_WAIT1:
2010 case NES_CM_STATE_FIN_WAIT2:
2011 case NES_CM_STATE_LAST_ACK:
2012 case NES_CM_STATE_TIME_WAIT:
2013 case NES_CM_STATE_CLOSING:
2016 case NES_CM_STATE_LISTENING:
2017 case NES_CM_STATE_UNKNOWN:
2018 case NES_CM_STATE_INITED:
2019 case NES_CM_STATE_CLOSED:
2020 ret = rem_ref_cm_node(cm_core, cm_node);
2022 case NES_CM_STATE_TSA:
2023 if (cm_node->send_entry)
2024 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2025 "send_entry=%p\n", cm_node->send_entry);
2026 ret = rem_ref_cm_node(cm_core, cm_node);
2034 * recv_pkt - recv an ETHERNET packet, and process it through CM
2035 * node state machine
2037 static void mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2038 struct nes_vnic *nesvnic, struct sk_buff *skb)
2040 struct nes_cm_node *cm_node = NULL;
2041 struct nes_cm_listener *listener = NULL;
2043 struct tcphdr *tcph;
2044 struct nes_cm_info nfo;
2048 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2049 dev_kfree_skb_any(skb);
2053 iph = (struct iphdr *)skb->data;
2054 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2055 skb_reset_network_header(skb);
2056 skb_set_transport_header(skb, sizeof(*tcph));
2058 dev_kfree_skb_any(skb);
2061 skb->len = ntohs(iph->tot_len);
2063 nfo.loc_addr = ntohl(iph->daddr);
2064 nfo.loc_port = ntohs(tcph->dest);
2065 nfo.rem_addr = ntohl(iph->saddr);
2066 nfo.rem_port = ntohs(tcph->source);
2068 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2069 &iph->daddr, tcph->dest, &iph->saddr, tcph->source);
2072 cm_node = find_node(cm_core,
2073 nfo.rem_port, nfo.rem_addr,
2074 nfo.loc_port, nfo.loc_addr);
2077 /* Only type of packet accepted are for */
2078 /* the PASSIVE open (syn only) */
2079 if ((!tcph->syn) || (tcph->ack)) {
2080 cm_packets_dropped++;
2083 listener = find_listener(cm_core, nfo.loc_addr,
2085 NES_CM_LISTENER_ACTIVE_STATE);
2087 nfo.cm_id = listener->cm_id;
2088 nfo.conn_type = listener->conn_type;
2090 nes_debug(NES_DBG_CM, "Unable to find listener "
2092 cm_packets_dropped++;
2093 dev_kfree_skb_any(skb);
2097 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2100 nes_debug(NES_DBG_CM, "Unable to allocate "
2102 cm_packets_dropped++;
2103 atomic_dec(&listener->ref_count);
2104 dev_kfree_skb_any(skb);
2107 if (!tcph->rst && !tcph->fin) {
2108 cm_node->state = NES_CM_STATE_LISTENING;
2110 cm_packets_dropped++;
2111 rem_ref_cm_node(cm_core, cm_node);
2112 dev_kfree_skb_any(skb);
2115 add_ref_cm_node(cm_node);
2116 } else if (cm_node->state == NES_CM_STATE_TSA) {
2117 rem_ref_cm_node(cm_core, cm_node);
2118 atomic_inc(&cm_accel_dropped_pkts);
2119 dev_kfree_skb_any(skb);
2122 process_packet(cm_node, skb, cm_core);
2123 rem_ref_cm_node(cm_core, cm_node);
2129 * nes_cm_alloc_core - allocate a top level instance of a cm core
2131 static struct nes_cm_core *nes_cm_alloc_core(void)
2135 struct nes_cm_core *cm_core;
2136 struct sk_buff *skb = NULL;
2138 /* setup the CM core */
2139 /* alloc top level core control structure */
2140 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2144 INIT_LIST_HEAD(&cm_core->connected_nodes);
2145 init_timer(&cm_core->tcp_timer);
2146 cm_core->tcp_timer.function = nes_cm_timer_tick;
2148 cm_core->mtu = NES_CM_DEFAULT_MTU;
2149 cm_core->state = NES_CM_STATE_INITED;
2150 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2152 atomic_set(&cm_core->events_posted, 0);
2154 /* init the packet lists */
2155 skb_queue_head_init(&cm_core->tx_free_list);
2157 for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) {
2158 skb = dev_alloc_skb(cm_core->mtu);
2163 /* add 'raw' skb to free frame list */
2164 skb_queue_head(&cm_core->tx_free_list, skb);
2167 cm_core->api = &nes_cm_api;
2169 spin_lock_init(&cm_core->ht_lock);
2170 spin_lock_init(&cm_core->listen_list_lock);
2172 INIT_LIST_HEAD(&cm_core->listen_list.list);
2174 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2176 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2177 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2178 cm_core->post_event = nes_cm_post_event;
2179 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2180 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2182 print_core(cm_core);
2188 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2190 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2192 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2199 if (timer_pending(&cm_core->tcp_timer)) {
2200 del_timer(&cm_core->tcp_timer);
2203 destroy_workqueue(cm_core->event_wq);
2204 destroy_workqueue(cm_core->disconn_wq);
2205 nes_debug(NES_DBG_CM, "\n");
2215 static int mini_cm_get(struct nes_cm_core *cm_core)
2217 return cm_core->state;
2224 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2229 case NES_CM_SET_PKT_SIZE:
2230 cm_core->mtu = value;
2232 case NES_CM_SET_FREE_PKT_Q_SIZE:
2233 cm_core->free_tx_pkt_max = value;
2236 /* unknown set option */
2245 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2246 * successfully exchanged when this is called
2248 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2255 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2256 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2257 NES_QPCONTEXT_MISC_DROS);
2259 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2260 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2262 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2264 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2266 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2267 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2269 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2270 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2271 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2273 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2274 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2275 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2277 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2278 nesqp->nesqp_context->ts_recent = 0;
2279 nesqp->nesqp_context->ts_age = 0;
2280 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2281 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2282 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2283 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2284 cm_node->tcp_cntxt.rcv_wscale);
2285 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2286 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2287 nesqp->nesqp_context->srtt = 0;
2288 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2289 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2290 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2291 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2292 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2293 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2295 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2296 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2297 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2298 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2299 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2300 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2301 le32_to_cpu(nesqp->nesqp_context->misc));
2302 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2303 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2304 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2306 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2307 cm_node->state = NES_CM_STATE_TSA;
2316 int nes_cm_disconn(struct nes_qp *nesqp)
2318 unsigned long flags;
2320 spin_lock_irqsave(&nesqp->lock, flags);
2321 if (nesqp->disconn_pending == 0) {
2322 nesqp->disconn_pending++;
2323 spin_unlock_irqrestore(&nesqp->lock, flags);
2324 /* init our disconnect work element, to */
2325 INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
2327 queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
2329 spin_unlock_irqrestore(&nesqp->lock, flags);
2336 * nes_disconnect_worker
2338 static void nes_disconnect_worker(struct work_struct *work)
2340 struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
2342 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2343 nesqp->last_aeq, nesqp->hwqp.qp_id);
2344 nes_cm_disconn_true(nesqp);
2349 * nes_cm_disconn_true
2351 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2353 unsigned long flags;
2355 struct iw_cm_id *cm_id;
2356 struct iw_cm_event cm_event;
2357 struct nes_vnic *nesvnic;
2359 u8 original_hw_tcp_state;
2360 u8 original_ibqp_state;
2361 u8 issued_disconnect_reset = 0;
2364 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2368 spin_lock_irqsave(&nesqp->lock, flags);
2369 cm_id = nesqp->cm_id;
2370 /* make sure we havent already closed this connection */
2372 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2374 spin_unlock_irqrestore(&nesqp->lock, flags);
2378 nesvnic = to_nesvnic(nesqp->ibqp.device);
2379 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2381 original_hw_tcp_state = nesqp->hw_tcp_state;
2382 original_ibqp_state = nesqp->ibqp_state;
2383 last_ae = nesqp->last_aeq;
2386 nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
2388 if ((nesqp->cm_id) && (cm_id->event_handler)) {
2389 if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2390 ((original_ibqp_state == IB_QPS_RTS) &&
2391 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2392 atomic_inc(&cm_disconnects);
2393 cm_event.event = IW_CM_EVENT_DISCONNECT;
2394 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
2395 issued_disconnect_reset = 1;
2396 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2397 nes_debug(NES_DBG_CM, "Generating a CM "
2398 "Disconnect Event (status reset) for "
2399 "QP%u, cm_id = %p. \n",
2400 nesqp->hwqp.qp_id, cm_id);
2402 cm_event.status = IW_CM_EVENT_STATUS_OK;
2404 cm_event.local_addr = cm_id->local_addr;
2405 cm_event.remote_addr = cm_id->remote_addr;
2406 cm_event.private_data = NULL;
2407 cm_event.private_data_len = 0;
2409 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2410 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2411 "cm_id = %p, refcount = %u.\n",
2412 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2413 nesqp->hwqp.sq_tail, cm_id,
2414 atomic_read(&nesqp->refcount));
2416 spin_unlock_irqrestore(&nesqp->lock, flags);
2417 ret = cm_id->event_handler(cm_id, &cm_event);
2419 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2420 "returned, ret=%d\n", ret);
2421 spin_lock_irqsave(&nesqp->lock, flags);
2424 nesqp->disconn_pending = 0;
2425 /* There might have been another AE while the lock was released */
2426 original_hw_tcp_state = nesqp->hw_tcp_state;
2427 original_ibqp_state = nesqp->ibqp_state;
2428 last_ae = nesqp->last_aeq;
2430 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2431 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2432 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2433 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2434 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2435 atomic_inc(&cm_closes);
2436 nesqp->cm_id = NULL;
2437 nesqp->in_disconnect = 0;
2438 spin_unlock_irqrestore(&nesqp->lock, flags);
2439 nes_disconnect(nesqp, 1);
2441 cm_id->provider_data = nesqp;
2442 /* Send up the close complete event */
2443 cm_event.event = IW_CM_EVENT_CLOSE;
2444 cm_event.status = IW_CM_EVENT_STATUS_OK;
2445 cm_event.provider_data = cm_id->provider_data;
2446 cm_event.local_addr = cm_id->local_addr;
2447 cm_event.remote_addr = cm_id->remote_addr;
2448 cm_event.private_data = NULL;
2449 cm_event.private_data_len = 0;
2451 ret = cm_id->event_handler(cm_id, &cm_event);
2453 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2456 cm_id->rem_ref(cm_id);
2458 spin_lock_irqsave(&nesqp->lock, flags);
2459 if (nesqp->flush_issued == 0) {
2460 nesqp->flush_issued = 1;
2461 spin_unlock_irqrestore(&nesqp->lock, flags);
2462 flush_wqes(nesvnic->nesdev, nesqp,
2463 NES_CQP_FLUSH_RQ, 1);
2465 spin_unlock_irqrestore(&nesqp->lock, flags);
2467 cm_id = nesqp->cm_id;
2468 spin_unlock_irqrestore(&nesqp->lock, flags);
2469 /* check to see if the inbound reset beat the outbound reset */
2470 if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
2471 nes_debug(NES_DBG_CM, "QP%u: Decing refcount "
2472 "due to inbound reset beating the "
2473 "outbound reset.\n", nesqp->hwqp.qp_id);
2477 nesqp->disconn_pending = 0;
2478 spin_unlock_irqrestore(&nesqp->lock, flags);
2488 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2491 struct nes_vnic *nesvnic;
2492 struct nes_device *nesdev;
2494 nesvnic = to_nesvnic(nesqp->ibqp.device);
2498 nesdev = nesvnic->nesdev;
2500 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2501 atomic_read(&nesvnic->netdev->refcnt));
2503 if (nesqp->active_conn) {
2505 /* indicate this connection is NOT active */
2506 nesqp->active_conn = 0;
2508 /* Need to free the Last Streaming Mode Message */
2509 if (nesqp->ietf_frame) {
2510 pci_free_consistent(nesdev->pcidev,
2511 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2512 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2516 /* close the CM node down if it is still active */
2517 if (nesqp->cm_node) {
2518 nes_debug(NES_DBG_CM, "Call close API\n");
2520 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2530 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2534 struct nes_qp *nesqp;
2535 struct nes_vnic *nesvnic;
2536 struct nes_device *nesdev;
2537 struct nes_cm_node *cm_node;
2538 struct nes_adapter *adapter;
2539 struct ib_qp_attr attr;
2540 struct iw_cm_event cm_event;
2541 struct nes_hw_qp_wqe *wqe;
2542 struct nes_v4_quad nes_quad;
2546 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2550 /* get all our handles */
2551 nesqp = to_nesqp(ibqp);
2552 nesvnic = to_nesvnic(nesqp->ibqp.device);
2553 nesdev = nesvnic->nesdev;
2554 adapter = nesdev->nesadapter;
2556 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2557 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2558 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2559 nesvnic->netdev->name);
2561 /* associate the node with the QP */
2562 nesqp->cm_node = (void *)cm_node;
2563 cm_node->nesqp = nesqp;
2564 nes_add_ref(&nesqp->ibqp);
2566 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2567 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2568 atomic_inc(&cm_accepts);
2570 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2571 atomic_read(&nesvnic->netdev->refcnt));
2573 /* allocate the ietf frame and space for private data */
2574 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2575 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2576 &nesqp->ietf_frame_pbase);
2578 if (!nesqp->ietf_frame) {
2579 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2585 /* setup the MPA frame */
2586 nesqp->private_data_len = conn_param->private_data_len;
2587 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2589 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2590 conn_param->private_data_len);
2592 nesqp->ietf_frame->priv_data_len =
2593 cpu_to_be16(conn_param->private_data_len);
2594 nesqp->ietf_frame->rev = mpa_version;
2595 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2597 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2598 wqe = &nesqp->hwqp.sq_vbase[0];
2600 if (cm_id->remote_addr.sin_addr.s_addr !=
2601 cm_id->local_addr.sin_addr.s_addr) {
2602 u64temp = (unsigned long)nesqp;
2603 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2604 set_wqe_64bit_value(wqe->wqe_words,
2605 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2607 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2608 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2609 NES_IWARP_SQ_WQE_WRPDU);
2610 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2611 cpu_to_le32(conn_param->private_data_len +
2612 sizeof(struct ietf_mpa_frame));
2613 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
2614 cpu_to_le32((u32)nesqp->ietf_frame_pbase);
2615 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
2616 cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
2617 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2618 cpu_to_le32(conn_param->private_data_len +
2619 sizeof(struct ietf_mpa_frame));
2620 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2622 nesqp->nesqp_context->ird_ord_sizes |=
2623 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2624 NES_QPCONTEXT_ORDIRD_WRPDU);
2626 nesqp->nesqp_context->ird_ord_sizes |=
2627 cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2628 NES_QPCONTEXT_ORDIRD_WRPDU |
2629 NES_QPCONTEXT_ORDIRD_ALSMM));
2631 nesqp->skip_lsmm = 1;
2634 /* Cache the cm_id in the qp */
2635 nesqp->cm_id = cm_id;
2636 cm_node->cm_id = cm_id;
2638 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2639 cm_id->provider_data = nesqp;
2640 nesqp->active_conn = 0;
2642 if (cm_node->state == NES_CM_STATE_TSA)
2643 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2646 nes_cm_init_tsa_conn(nesqp, cm_node);
2648 nesqp->nesqp_context->tcpPorts[0] =
2649 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2650 nesqp->nesqp_context->tcpPorts[1] =
2651 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2653 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2654 nesqp->nesqp_context->ip0 =
2655 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2657 nesqp->nesqp_context->ip0 =
2658 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2660 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2661 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2662 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2664 nesqp->nesqp_context->arp_index_vlan |=
2665 cpu_to_le32(nes_arp_table(nesdev,
2666 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2667 NES_ARP_RESOLVE) << 16);
2669 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2670 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2672 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2674 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2675 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2676 nesqp->nesqp_context->ird_ord_sizes |=
2677 cpu_to_le32((u32)conn_param->ord);
2679 memset(&nes_quad, 0, sizeof(nes_quad));
2680 nes_quad.DstIpAdrIndex =
2681 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2682 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2683 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2685 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2686 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2687 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2689 /* Produce hash key */
2690 crc_value = get_crc_value(&nes_quad);
2691 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2692 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2693 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2695 nesqp->hte_index &= adapter->hte_index_mask;
2696 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2698 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2700 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2701 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2702 "private data length=%zu.\n", nesqp->hwqp.qp_id,
2703 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2704 ntohs(cm_id->remote_addr.sin_port),
2705 ntohl(cm_id->local_addr.sin_addr.s_addr),
2706 ntohs(cm_id->local_addr.sin_port),
2707 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2708 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2709 conn_param->private_data_len +
2710 sizeof(struct ietf_mpa_frame));
2712 attr.qp_state = IB_QPS_RTS;
2713 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2715 /* notify OF layer that accept event was successfull */
2716 cm_id->add_ref(cm_id);
2718 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2719 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2720 cm_event.provider_data = (void *)nesqp;
2721 cm_event.local_addr = cm_id->local_addr;
2722 cm_event.remote_addr = cm_id->remote_addr;
2723 cm_event.private_data = NULL;
2724 cm_event.private_data_len = 0;
2725 ret = cm_id->event_handler(cm_id, &cm_event);
2726 if (cm_node->loopbackpartner) {
2727 cm_node->loopbackpartner->mpa_frame_size =
2728 nesqp->private_data_len;
2729 /* copy entire MPA frame to our cm_node's frame */
2730 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2731 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2732 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2735 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2736 "ret=%d\n", __func__, __LINE__, ret);
2745 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2747 struct nes_cm_node *cm_node;
2748 struct nes_cm_core *cm_core;
2750 atomic_inc(&cm_rejects);
2751 cm_node = (struct nes_cm_node *) cm_id->provider_data;
2752 cm_core = cm_node->cm_core;
2753 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2755 strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
2756 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2758 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2759 cm_node->mpa_frame.rev = mpa_version;
2760 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2762 cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2770 * setup and launch cm connect node
2772 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2775 struct nes_qp *nesqp;
2776 struct nes_vnic *nesvnic;
2777 struct nes_device *nesdev;
2778 struct nes_cm_node *cm_node;
2779 struct nes_cm_info cm_info;
2781 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2784 nesqp = to_nesqp(ibqp);
2787 nesvnic = to_nesvnic(nesqp->ibqp.device);
2790 nesdev = nesvnic->nesdev;
2794 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
2795 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
2796 ntohl(nesvnic->local_ipaddr),
2797 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2798 ntohs(cm_id->remote_addr.sin_port),
2799 ntohl(cm_id->local_addr.sin_addr.s_addr),
2800 ntohs(cm_id->local_addr.sin_port));
2802 atomic_inc(&cm_connects);
2803 nesqp->active_conn = 1;
2805 /* cache the cm_id in the qp */
2806 nesqp->cm_id = cm_id;
2808 cm_id->provider_data = nesqp;
2810 nesqp->private_data_len = conn_param->private_data_len;
2811 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2812 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
2813 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
2814 conn_param->private_data_len);
2816 if (cm_id->local_addr.sin_addr.s_addr !=
2817 cm_id->remote_addr.sin_addr.s_addr)
2818 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2819 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2821 /* set up the connection params for the node */
2822 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
2823 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
2824 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
2825 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
2826 cm_info.cm_id = cm_id;
2827 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2829 cm_id->add_ref(cm_id);
2831 /* create a connect CM node connection */
2832 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
2833 conn_param->private_data_len, (void *)conn_param->private_data,
2836 if (cm_id->local_addr.sin_addr.s_addr !=
2837 cm_id->remote_addr.sin_addr.s_addr)
2838 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2839 PCI_FUNC(nesdev->pcidev->devfn),
2840 NES_MANAGE_APBVT_DEL);
2842 cm_id->rem_ref(cm_id);
2846 cm_node->apbvt_set = 1;
2847 nesqp->cm_node = cm_node;
2848 cm_node->nesqp = nesqp;
2849 nes_add_ref(&nesqp->ibqp);
2858 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
2860 struct nes_vnic *nesvnic;
2861 struct nes_cm_listener *cm_node;
2862 struct nes_cm_info cm_info;
2863 struct nes_adapter *adapter;
2867 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
2868 cm_id, ntohs(cm_id->local_addr.sin_port));
2870 nesvnic = to_nesvnic(cm_id->device);
2873 adapter = nesvnic->nesdev->nesadapter;
2874 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2875 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2877 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
2878 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
2880 /* setup listen params in our api call struct */
2881 cm_info.loc_addr = nesvnic->local_ipaddr;
2882 cm_info.loc_port = cm_id->local_addr.sin_port;
2883 cm_info.backlog = backlog;
2884 cm_info.cm_id = cm_id;
2886 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2889 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
2891 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
2892 __func__, __LINE__);
2896 cm_id->provider_data = cm_node;
2898 if (!cm_node->reused_node) {
2899 err = nes_manage_apbvt(nesvnic,
2900 ntohs(cm_id->local_addr.sin_port),
2901 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
2902 NES_MANAGE_APBVT_ADD);
2904 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
2906 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
2909 cm_listens_created++;
2912 cm_id->add_ref(cm_id);
2913 cm_id->provider_data = (void *)cm_node;
2921 * nes_destroy_listen
2923 int nes_destroy_listen(struct iw_cm_id *cm_id)
2925 if (cm_id->provider_data)
2926 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
2928 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
2930 cm_id->rem_ref(cm_id);
2939 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
2941 cm_packets_received++;
2942 if ((g_cm_core) && (g_cm_core->api)) {
2943 g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
2945 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
2946 " cm is not setup properly.\n");
2955 * Start and init a cm core module
2957 int nes_cm_start(void)
2959 nes_debug(NES_DBG_CM, "\n");
2960 /* create the primary CM core, pass this handle to subsequent core inits */
2961 g_cm_core = nes_cm_alloc_core();
2972 * stop and dealloc all cm core instances
2974 int nes_cm_stop(void)
2976 g_cm_core->api->destroy_cm_core(g_cm_core);
2982 * cm_event_connected
2983 * handle a connected event, setup QPs and HW
2985 static void cm_event_connected(struct nes_cm_event *event)
2988 struct nes_qp *nesqp;
2989 struct nes_vnic *nesvnic;
2990 struct nes_device *nesdev;
2991 struct nes_cm_node *cm_node;
2992 struct nes_adapter *nesadapter;
2993 struct ib_qp_attr attr;
2994 struct iw_cm_id *cm_id;
2995 struct iw_cm_event cm_event;
2996 struct nes_hw_qp_wqe *wqe;
2997 struct nes_v4_quad nes_quad;
3001 /* get all our handles */
3002 cm_node = event->cm_node;
3003 cm_id = cm_node->cm_id;
3004 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3005 nesqp = (struct nes_qp *)cm_id->provider_data;
3006 nesvnic = to_nesvnic(nesqp->ibqp.device);
3007 nesdev = nesvnic->nesdev;
3008 nesadapter = nesdev->nesadapter;
3010 if (nesqp->destroyed) {
3013 atomic_inc(&cm_connecteds);
3014 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3015 " local port 0x%04X. jiffies = %lu.\n",
3017 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3018 ntohs(cm_id->remote_addr.sin_port),
3019 ntohs(cm_id->local_addr.sin_port),
3022 nes_cm_init_tsa_conn(nesqp, cm_node);
3024 /* set the QP tsa context */
3025 nesqp->nesqp_context->tcpPorts[0] =
3026 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3027 nesqp->nesqp_context->tcpPorts[1] =
3028 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3029 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3030 nesqp->nesqp_context->ip0 =
3031 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3033 nesqp->nesqp_context->ip0 =
3034 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3036 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3037 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3038 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3039 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3040 nes_arp_table(nesdev,
3041 le32_to_cpu(nesqp->nesqp_context->ip0),
3042 NULL, NES_ARP_RESOLVE) << 16);
3043 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3044 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3045 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3046 nesqp->nesqp_context->ird_ord_sizes |=
3047 cpu_to_le32((u32)1 <<
3048 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3050 /* Adjust tail for not having a LSMM */
3051 nesqp->hwqp.sq_tail = 1;
3053 #if defined(NES_SEND_FIRST_WRITE)
3054 if (cm_node->send_write0) {
3055 nes_debug(NES_DBG_CM, "Sending first write.\n");
3056 wqe = &nesqp->hwqp.sq_vbase[0];
3057 u64temp = (unsigned long)nesqp;
3058 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3059 set_wqe_64bit_value(wqe->wqe_words,
3060 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3061 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3062 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3063 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3064 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3065 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3066 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3067 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3069 /* use the reserved spot on the WQ for the extra first WQE */
3070 nesqp->nesqp_context->ird_ord_sizes &=
3071 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3072 NES_QPCONTEXT_ORDIRD_WRPDU |
3073 NES_QPCONTEXT_ORDIRD_ALSMM));
3074 nesqp->skip_lsmm = 1;
3075 nesqp->hwqp.sq_tail = 0;
3076 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3077 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3081 memset(&nes_quad, 0, sizeof(nes_quad));
3083 nes_quad.DstIpAdrIndex =
3084 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3085 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3086 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3088 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3089 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3090 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3092 /* Produce hash key */
3093 crc_value = get_crc_value(&nes_quad);
3094 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3095 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3096 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3098 nesqp->hte_index &= nesadapter->hte_index_mask;
3099 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3101 nesqp->ietf_frame = &cm_node->mpa_frame;
3102 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3103 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3105 /* notify OF layer we successfully created the requested connection */
3106 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3107 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3108 cm_event.provider_data = cm_id->provider_data;
3109 cm_event.local_addr.sin_family = AF_INET;
3110 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3111 cm_event.remote_addr = cm_id->remote_addr;
3113 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3114 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3116 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3117 ret = cm_id->event_handler(cm_id, &cm_event);
3118 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3121 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3122 "ret=%d\n", __func__, __LINE__, ret);
3123 attr.qp_state = IB_QPS_RTS;
3124 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3126 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3127 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3134 * cm_event_connect_error
3136 static void cm_event_connect_error(struct nes_cm_event *event)
3138 struct nes_qp *nesqp;
3139 struct iw_cm_id *cm_id;
3140 struct iw_cm_event cm_event;
3141 /* struct nes_cm_info cm_info; */
3144 if (!event->cm_node)
3147 cm_id = event->cm_node->cm_id;
3152 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3153 nesqp = cm_id->provider_data;
3159 /* notify OF layer about this connection error event */
3160 /* cm_id->rem_ref(cm_id); */
3161 nesqp->cm_id = NULL;
3162 cm_id->provider_data = NULL;
3163 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3164 cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
3165 cm_event.provider_data = cm_id->provider_data;
3166 cm_event.local_addr = cm_id->local_addr;
3167 cm_event.remote_addr = cm_id->remote_addr;
3168 cm_event.private_data = NULL;
3169 cm_event.private_data_len = 0;
3171 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3172 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3173 cm_event.remote_addr.sin_addr.s_addr);
3175 ret = cm_id->event_handler(cm_id, &cm_event);
3176 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3178 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3179 "ret=%d\n", __func__, __LINE__, ret);
3180 cm_id->rem_ref(cm_id);
3182 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3190 static void cm_event_reset(struct nes_cm_event *event)
3192 struct nes_qp *nesqp;
3193 struct iw_cm_id *cm_id;
3194 struct iw_cm_event cm_event;
3195 /* struct nes_cm_info cm_info; */
3198 if (!event->cm_node)
3201 if (!event->cm_node->cm_id)
3204 cm_id = event->cm_node->cm_id;
3206 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3207 nesqp = cm_id->provider_data;
3209 nesqp->cm_id = NULL;
3210 /* cm_id->provider_data = NULL; */
3211 cm_event.event = IW_CM_EVENT_DISCONNECT;
3212 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3213 cm_event.provider_data = cm_id->provider_data;
3214 cm_event.local_addr = cm_id->local_addr;
3215 cm_event.remote_addr = cm_id->remote_addr;
3216 cm_event.private_data = NULL;
3217 cm_event.private_data_len = 0;
3219 ret = cm_id->event_handler(cm_id, &cm_event);
3220 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3223 /* notify OF layer about this connection error event */
3224 cm_id->rem_ref(cm_id);
3233 static void cm_event_mpa_req(struct nes_cm_event *event)
3235 struct iw_cm_id *cm_id;
3236 struct iw_cm_event cm_event;
3238 struct nes_cm_node *cm_node;
3240 cm_node = event->cm_node;
3243 cm_id = cm_node->cm_id;
3245 atomic_inc(&cm_connect_reqs);
3246 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3247 cm_node, cm_id, jiffies);
3249 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3250 cm_event.status = IW_CM_EVENT_STATUS_OK;
3251 cm_event.provider_data = (void *)cm_node;
3253 cm_event.local_addr.sin_family = AF_INET;
3254 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3255 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3257 cm_event.remote_addr.sin_family = AF_INET;
3258 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3259 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3261 cm_event.private_data = cm_node->mpa_frame_buf;
3262 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3264 ret = cm_id->event_handler(cm_id, &cm_event);
3266 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
3267 __func__, __LINE__, ret);
3273 static void nes_cm_event_handler(struct work_struct *);
3277 * post an event to the cm event handler
3279 static int nes_cm_post_event(struct nes_cm_event *event)
3281 atomic_inc(&event->cm_node->cm_core->events_posted);
3282 add_ref_cm_node(event->cm_node);
3283 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3284 INIT_WORK(&event->event_work, nes_cm_event_handler);
3285 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3286 event->cm_node, event);
3288 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3290 nes_debug(NES_DBG_CM, "Exit\n");
3296 * nes_cm_event_handler
3297 * worker function to handle cm events
3298 * will free instance of nes_cm_event
3300 static void nes_cm_event_handler(struct work_struct *work)
3302 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3304 struct nes_cm_core *cm_core;
3306 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3309 cm_core = event->cm_node->cm_core;
3310 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3311 event, event->type, atomic_read(&cm_core->events_posted));
3313 switch (event->type) {
3314 case NES_CM_EVENT_MPA_REQ:
3315 cm_event_mpa_req(event);
3316 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3319 case NES_CM_EVENT_RESET:
3320 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3322 cm_event_reset(event);
3324 case NES_CM_EVENT_CONNECTED:
3325 if ((!event->cm_node->cm_id) ||
3326 (event->cm_node->state != NES_CM_STATE_TSA))
3328 cm_event_connected(event);
3329 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3331 case NES_CM_EVENT_ABORTED:
3332 if ((!event->cm_node->cm_id) ||
3333 (event->cm_node->state == NES_CM_STATE_TSA))
3335 cm_event_connect_error(event);
3336 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3338 case NES_CM_EVENT_DROPPED_PKT:
3339 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3342 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3346 atomic_dec(&cm_core->events_posted);
3347 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3348 rem_ref_cm_node(cm_core, event->cm_node);