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 int 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 void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
96 void *, u32, void *, u32, u8);
97 static int add_ref_cm_node(struct nes_cm_node *);
98 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
100 static int nes_cm_disconn_true(struct nes_qp *);
101 static int nes_cm_post_event(struct nes_cm_event *event);
102 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
103 static void nes_disconnect_worker(struct work_struct *work);
105 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
106 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
107 static int send_reset(struct nes_cm_node *, struct sk_buff *);
108 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
109 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
110 static void process_packet(struct nes_cm_node *, struct sk_buff *,
111 struct nes_cm_core *);
113 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
114 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
115 static void cleanup_retrans_entry(struct nes_cm_node *);
116 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *,
117 enum nes_cm_event_type);
118 static void free_retrans_entry(struct nes_cm_node *cm_node);
119 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
120 struct sk_buff *skb, int optionsize, int passive);
122 /* CM event handler functions */
123 static void cm_event_connected(struct nes_cm_event *);
124 static void cm_event_connect_error(struct nes_cm_event *);
125 static void cm_event_reset(struct nes_cm_event *);
126 static void cm_event_mpa_req(struct nes_cm_event *);
128 static void print_core(struct nes_cm_core *core);
130 /* External CM API Interface */
131 /* instance of function pointers for client API */
132 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
133 static struct nes_cm_ops nes_cm_api = {
142 mini_cm_dealloc_core,
147 static struct nes_cm_core *g_cm_core;
149 atomic_t cm_connects;
151 atomic_t cm_disconnects;
153 atomic_t cm_connecteds;
154 atomic_t cm_connect_reqs;
161 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
162 enum nes_cm_event_type type)
164 struct nes_cm_event *event;
169 /* allocate an empty event */
170 event = kzalloc(sizeof(*event), GFP_ATOMIC);
176 event->cm_node = cm_node;
177 event->cm_info.rem_addr = cm_node->rem_addr;
178 event->cm_info.loc_addr = cm_node->loc_addr;
179 event->cm_info.rem_port = cm_node->rem_port;
180 event->cm_info.loc_port = cm_node->loc_port;
181 event->cm_info.cm_id = cm_node->cm_id;
183 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
184 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
185 cm_node, event, type, event->cm_info.loc_addr,
186 event->cm_info.loc_port, event->cm_info.rem_addr,
187 event->cm_info.rem_port);
189 nes_cm_post_event(event);
197 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
201 nes_debug(NES_DBG_CM, "skb set to NULL\n");
205 /* send an MPA Request frame */
206 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
207 cm_node->mpa_frame_size, SET_ACK);
209 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
218 * recv_mpa - process a received TCP pkt, we are expecting an
221 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len)
223 struct ietf_mpa_frame *mpa_frame;
225 /* assume req frame is in tcp data payload */
226 if (len < sizeof(struct ietf_mpa_frame)) {
227 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
231 mpa_frame = (struct ietf_mpa_frame *)buffer;
232 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
234 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
235 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
236 " complete (%x + %x != %x)\n",
237 cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len);
241 /* copy entire MPA frame to our cm_node's frame */
242 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
243 cm_node->mpa_frame_size);
250 * form_cm_frame - get a free packet and build empty frame Use
251 * node info to build.
253 static void form_cm_frame(struct sk_buff *skb,
254 struct nes_cm_node *cm_node, void *options, u32 optionsize,
255 void *data, u32 datasize, u8 flags)
261 u16 packetsize = sizeof(*iph);
263 packetsize += sizeof(*tcph);
264 packetsize += optionsize + datasize;
266 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
269 buf = skb_put(skb, packetsize + ETH_HLEN);
271 ethh = (struct ethhdr *) buf;
274 iph = (struct iphdr *)buf;
276 tcph = (struct tcphdr *)buf;
277 skb_reset_mac_header(skb);
278 skb_set_network_header(skb, ETH_HLEN);
279 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
280 buf += sizeof(*tcph);
282 skb->ip_summed = CHECKSUM_PARTIAL;
283 skb->protocol = htons(0x800);
285 skb->mac_len = ETH_HLEN;
287 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
288 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
289 ethh->h_proto = htons(0x0800);
291 iph->version = IPVERSION;
292 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
294 iph->tot_len = htons(packetsize);
295 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
297 iph->frag_off = htons(0x4000);
299 iph->protocol = 0x06; /* IPPROTO_TCP */
301 iph->saddr = htonl(cm_node->loc_addr);
302 iph->daddr = htonl(cm_node->rem_addr);
304 tcph->source = htons(cm_node->loc_port);
305 tcph->dest = htons(cm_node->rem_port);
306 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
308 if (flags & SET_ACK) {
309 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
310 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
315 if (flags & SET_SYN) {
316 cm_node->tcp_cntxt.loc_seq_num++;
319 cm_node->tcp_cntxt.loc_seq_num += datasize;
321 if (flags & SET_FIN) {
322 cm_node->tcp_cntxt.loc_seq_num++;
329 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
330 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
333 memcpy(buf, options, optionsize);
336 memcpy(buf, data, datasize);
338 skb_shinfo(skb)->nr_frags = 0;
339 cm_packets_created++;
345 * print_core - dump a cm core
347 static void print_core(struct nes_cm_core *core)
349 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
350 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
353 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
355 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
357 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
358 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
360 nes_debug(NES_DBG_CM, "core : %p \n", core);
362 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
368 * note - cm_node needs to be protected before calling this. Encase in:
369 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
371 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
372 enum nes_timer_type type, int send_retrans,
373 int close_when_complete)
376 struct nes_cm_core *cm_core = cm_node->cm_core;
377 struct nes_timer_entry *new_send;
381 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
385 /* new_send->timetosend = currenttime */
386 new_send->retrycount = NES_DEFAULT_RETRYS;
387 new_send->retranscount = NES_DEFAULT_RETRANS;
389 new_send->timetosend = jiffies;
390 new_send->type = type;
391 new_send->netdev = cm_node->netdev;
392 new_send->send_retrans = send_retrans;
393 new_send->close_when_complete = close_when_complete;
395 if (type == NES_TIMER_TYPE_CLOSE) {
396 new_send->timetosend += (HZ/10);
397 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
398 list_add_tail(&new_send->list, &cm_node->recv_list);
399 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
402 if (type == NES_TIMER_TYPE_SEND) {
403 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
404 atomic_inc(&new_send->skb->users);
405 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
406 cm_node->send_entry = new_send;
407 add_ref_cm_node(cm_node);
408 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
409 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
411 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
412 if (ret != NETDEV_TX_OK) {
413 nes_debug(NES_DBG_CM, "Error sending packet %p "
414 "(jiffies = %lu)\n", new_send, jiffies);
415 atomic_dec(&new_send->skb->users);
416 new_send->timetosend = jiffies;
420 cleanup_retrans_entry(cm_node);
421 if (close_when_complete)
422 rem_ref_cm_node(cm_core, cm_node);
428 was_timer_set = timer_pending(&cm_core->tcp_timer);
430 if (!was_timer_set) {
431 cm_core->tcp_timer.expires = new_send->timetosend;
432 add_timer(&cm_core->tcp_timer);
442 static void nes_cm_timer_tick(unsigned long pass)
444 unsigned long flags, qplockflags;
445 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
446 struct iw_cm_id *cm_id;
447 struct nes_cm_node *cm_node;
448 struct nes_timer_entry *send_entry, *recv_entry;
449 struct list_head *list_core, *list_core_temp;
450 struct list_head *list_node, *list_node_temp;
451 struct nes_cm_core *cm_core = g_cm_core;
452 struct nes_qp *nesqp;
454 int ret = NETDEV_TX_OK;
455 enum nes_cm_node_state last_state;
457 struct list_head timer_list;
458 INIT_LIST_HEAD(&timer_list);
459 spin_lock_irqsave(&cm_core->ht_lock, flags);
461 list_for_each_safe(list_node, list_core_temp,
462 &cm_core->connected_nodes) {
463 cm_node = container_of(list_node, struct nes_cm_node, list);
464 if (!list_empty(&cm_node->recv_list) || (cm_node->send_entry)) {
465 add_ref_cm_node(cm_node);
466 list_add(&cm_node->timer_entry, &timer_list);
469 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
471 list_for_each_safe(list_node, list_core_temp, &timer_list) {
472 cm_node = container_of(list_node, struct nes_cm_node,
474 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
475 list_for_each_safe(list_core, list_node_temp,
476 &cm_node->recv_list) {
477 recv_entry = container_of(list_core,
478 struct nes_timer_entry, list);
481 if (time_after(recv_entry->timetosend, jiffies)) {
482 if (nexttimeout > recv_entry->timetosend ||
484 nexttimeout = recv_entry->timetosend;
489 list_del(&recv_entry->list);
490 cm_id = cm_node->cm_id;
491 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
492 nesqp = (struct nes_qp *)recv_entry->skb;
493 spin_lock_irqsave(&nesqp->lock, qplockflags);
495 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
496 "refcount = %d: HIT A "
497 "NES_TIMER_TYPE_CLOSE with something "
498 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
499 atomic_read(&nesqp->refcount));
500 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
501 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
502 nesqp->ibqp_state = IB_QPS_ERR;
503 spin_unlock_irqrestore(&nesqp->lock,
505 nes_cm_disconn(nesqp);
507 spin_unlock_irqrestore(&nesqp->lock,
509 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
510 "refcount = %d: HIT A "
511 "NES_TIMER_TYPE_CLOSE with nothing "
512 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
513 atomic_read(&nesqp->refcount));
516 cm_id->rem_ref(cm_id);
519 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
521 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
523 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
525 send_entry = cm_node->send_entry;
528 if (time_after(send_entry->timetosend, jiffies)) {
529 if (cm_node->state != NES_CM_STATE_TSA) {
531 send_entry->timetosend) ||
534 send_entry->timetosend;
539 free_retrans_entry(cm_node);
544 if ((cm_node->state == NES_CM_STATE_TSA) ||
545 (cm_node->state == NES_CM_STATE_CLOSED)) {
546 free_retrans_entry(cm_node);
550 if (!send_entry->retranscount ||
551 !send_entry->retrycount) {
552 cm_packets_dropped++;
553 last_state = cm_node->state;
554 cm_node->state = NES_CM_STATE_CLOSED;
555 free_retrans_entry(cm_node);
556 spin_unlock_irqrestore(
557 &cm_node->retrans_list_lock, flags);
558 if (last_state == NES_CM_STATE_SYN_RCVD)
559 rem_ref_cm_node(cm_core, cm_node);
561 create_event(cm_node,
562 NES_CM_EVENT_ABORTED);
563 spin_lock_irqsave(&cm_node->retrans_list_lock,
567 atomic_inc(&send_entry->skb->users);
568 cm_packets_retrans++;
569 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
570 "for node %p, jiffies = %lu, time to send = "
571 "%lu, retranscount = %u, send_entry->seq_num = "
572 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
573 "0x%08X\n", send_entry, cm_node, jiffies,
574 send_entry->timetosend,
575 send_entry->retranscount,
577 cm_node->tcp_cntxt.rem_ack_num);
579 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
581 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
582 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
583 if (ret != NETDEV_TX_OK) {
584 nes_debug(NES_DBG_CM, "rexmit failed for "
585 "node=%p\n", cm_node);
586 cm_packets_bounced++;
587 atomic_dec(&send_entry->skb->users);
588 send_entry->retrycount--;
589 nexttimeout = jiffies + NES_SHORT_TIME;
595 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
596 "%u, retry count = %u.\n",
597 send_entry->retranscount,
598 send_entry->retrycount);
599 if (send_entry->send_retrans) {
600 send_entry->retranscount--;
601 send_entry->timetosend = jiffies +
603 if (nexttimeout > send_entry->timetosend ||
605 nexttimeout = send_entry->timetosend;
609 int close_when_complete;
610 close_when_complete =
611 send_entry->close_when_complete;
612 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
613 cm_node, cm_node->state);
614 free_retrans_entry(cm_node);
615 if (close_when_complete)
616 rem_ref_cm_node(cm_node->cm_core,
621 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
622 rem_ref_cm_node(cm_node->cm_core, cm_node);
623 if (ret != NETDEV_TX_OK) {
624 nes_debug(NES_DBG_CM, "rexmit failed for cm_node=%p\n",
631 if (!timer_pending(&cm_core->tcp_timer)) {
632 cm_core->tcp_timer.expires = nexttimeout;
633 add_timer(&cm_core->tcp_timer);
642 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
647 char optionsbuffer[sizeof(struct option_mss) +
648 sizeof(struct option_windowscale) + sizeof(struct option_base) +
649 TCP_OPTIONS_PADDING];
652 /* Sending MSS option */
653 union all_known_options *options;
658 options = (union all_known_options *)&optionsbuffer[optionssize];
659 options->as_mss.optionnum = OPTION_NUMBER_MSS;
660 options->as_mss.length = sizeof(struct option_mss);
661 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
662 optionssize += sizeof(struct option_mss);
664 options = (union all_known_options *)&optionsbuffer[optionssize];
665 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
666 options->as_windowscale.length = sizeof(struct option_windowscale);
667 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
668 optionssize += sizeof(struct option_windowscale);
670 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
671 options = (union all_known_options *)&optionsbuffer[optionssize];
672 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
673 options->as_base.length = sizeof(struct option_base);
674 optionssize += sizeof(struct option_base);
675 /* we need the size to be a multiple of 4 */
676 options = (union all_known_options *)&optionsbuffer[optionssize];
679 options = (union all_known_options *)&optionsbuffer[optionssize];
684 options = (union all_known_options *)&optionsbuffer[optionssize];
685 options->as_end = OPTION_NUMBER_END;
689 skb = dev_alloc_skb(MAX_CM_BUFFER);
691 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
698 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
699 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
708 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
711 int flags = SET_RST | SET_ACK;
714 skb = dev_alloc_skb(MAX_CM_BUFFER);
716 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
720 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
721 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
730 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
735 skb = dev_alloc_skb(MAX_CM_BUFFER);
738 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
742 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
743 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
752 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
756 /* if we didn't get a frame get one */
758 skb = dev_alloc_skb(MAX_CM_BUFFER);
761 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
765 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
766 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
773 * find_node - find a cm node that matches the reference cm node
775 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
776 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
779 struct list_head *hte;
780 struct nes_cm_node *cm_node;
782 /* get a handle on the hte */
783 hte = &cm_core->connected_nodes;
785 nes_debug(NES_DBG_CM, "Searching for an owner node: " NIPQUAD_FMT ":%x from core %p->%p\n",
786 HIPQUAD(loc_addr), loc_port, cm_core, hte);
788 /* walk list and find cm_node associated with this session ID */
789 spin_lock_irqsave(&cm_core->ht_lock, flags);
790 list_for_each_entry(cm_node, hte, list) {
791 /* compare quad, return node handle if a match */
792 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
793 cm_node->loc_addr, cm_node->loc_port,
795 cm_node->rem_addr, cm_node->rem_port,
797 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
798 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
799 add_ref_cm_node(cm_node);
800 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
804 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
812 * find_listener - find a cm node listening on this addr-port pair
814 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
815 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
818 struct nes_cm_listener *listen_node;
820 /* walk list and find cm_node associated with this session ID */
821 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
822 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
823 /* compare node pair, return node handle if a match */
824 if (((listen_node->loc_addr == dst_addr) ||
825 listen_node->loc_addr == 0x00000000) &&
826 (listen_node->loc_port == dst_port) &&
827 (listener_state & listen_node->listener_state)) {
828 atomic_inc(&listen_node->ref_count);
829 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
833 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
835 nes_debug(NES_DBG_CM, "Unable to find listener for " NIPQUAD_FMT ":%x\n",
836 HIPQUAD(dst_addr), dst_port);
844 * add_hte_node - add a cm node to the hash table
846 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
849 struct list_head *hte;
851 if (!cm_node || !cm_core)
854 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
857 spin_lock_irqsave(&cm_core->ht_lock, flags);
859 /* get a handle on the hash table element (list head for this slot) */
860 hte = &cm_core->connected_nodes;
861 list_add_tail(&cm_node->list, hte);
862 atomic_inc(&cm_core->ht_node_cnt);
864 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
871 * mini_cm_dec_refcnt_listen
873 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
874 struct nes_cm_listener *listener, int free_hanging_nodes)
878 struct list_head *list_pos = NULL;
879 struct list_head *list_temp = NULL;
880 struct nes_cm_node *cm_node = NULL;
881 struct list_head reset_list;
883 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
884 "refcnt=%d\n", listener, free_hanging_nodes,
885 atomic_read(&listener->ref_count));
886 /* free non-accelerated child nodes for this listener */
887 INIT_LIST_HEAD(&reset_list);
888 if (free_hanging_nodes) {
889 spin_lock_irqsave(&cm_core->ht_lock, flags);
890 list_for_each_safe(list_pos, list_temp,
891 &g_cm_core->connected_nodes) {
892 cm_node = container_of(list_pos, struct nes_cm_node,
894 if ((cm_node->listener == listener) &&
895 (!cm_node->accelerated)) {
896 add_ref_cm_node(cm_node);
897 list_add(&cm_node->reset_entry, &reset_list);
900 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
903 list_for_each_safe(list_pos, list_temp, &reset_list) {
904 cm_node = container_of(list_pos, struct nes_cm_node,
906 cleanup_retrans_entry(cm_node);
907 send_reset(cm_node, NULL);
908 rem_ref_cm_node(cm_node->cm_core, cm_node);
911 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
912 if (!atomic_dec_return(&listener->ref_count)) {
913 list_del(&listener->list);
915 /* decrement our listen node count */
916 atomic_dec(&cm_core->listen_node_cnt);
918 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
920 if (listener->nesvnic) {
921 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
922 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
925 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
930 cm_listens_destroyed++;
932 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
935 if (atomic_read(&listener->pend_accepts_cnt) > 0)
936 nes_debug(NES_DBG_CM, "destroying listener (%p)"
937 " with non-zero pending accepts=%u\n",
938 listener, atomic_read(&listener->pend_accepts_cnt));
948 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
949 struct nes_cm_listener *listener)
951 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
952 listener->cm_id = NULL; /* going to be destroyed pretty soon */
953 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
958 * mini_cm_accelerated
960 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
961 struct nes_cm_node *cm_node)
964 cm_node->accelerated = 1;
966 if (cm_node->accept_pend) {
967 BUG_ON(!cm_node->listener);
968 atomic_dec(&cm_node->listener->pend_accepts_cnt);
969 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
972 was_timer_set = timer_pending(&cm_core->tcp_timer);
973 if (!was_timer_set) {
974 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
975 add_timer(&cm_core->tcp_timer);
983 * nes_addr_resolve_neigh
985 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
989 struct neighbour *neigh;
991 DECLARE_MAC_BUF(mac);
993 memset(&fl, 0, sizeof fl);
994 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
995 if (ip_route_output_key(&init_net, &rt, &fl)) {
996 printk("%s: ip_route_output_key failed for 0x%08X\n",
1001 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1003 if (neigh->nud_state & NUD_VALID) {
1004 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1005 " is %s, Gateway is 0x%08X \n", dst_ip,
1006 print_mac(mac, neigh->ha), ntohl(rt->rt_gateway));
1007 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1008 dst_ip, NES_ARP_ADD);
1009 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1012 neigh_release(neigh);
1015 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1016 neigh_event_send(rt->u.dst.neighbour, NULL);
1024 * make_cm_node - create a new instance of a cm node
1026 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1027 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1028 struct nes_cm_listener *listener)
1030 struct nes_cm_node *cm_node;
1033 struct nes_device *nesdev;
1034 struct nes_adapter *nesadapter;
1035 DECLARE_MAC_BUF(mac);
1037 /* create an hte and cm_node for this instance */
1038 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1042 /* set our node specific transport info */
1043 cm_node->loc_addr = cm_info->loc_addr;
1044 cm_node->rem_addr = cm_info->rem_addr;
1045 cm_node->loc_port = cm_info->loc_port;
1046 cm_node->rem_port = cm_info->rem_port;
1047 cm_node->send_write0 = send_first;
1048 nes_debug(NES_DBG_CM, "Make node addresses : loc = " NIPQUAD_FMT
1049 ":%x, rem = " NIPQUAD_FMT ":%x\n",
1050 HIPQUAD(cm_node->loc_addr), cm_node->loc_port,
1051 HIPQUAD(cm_node->rem_addr), cm_node->rem_port);
1052 cm_node->listener = listener;
1053 cm_node->netdev = nesvnic->netdev;
1054 cm_node->cm_id = cm_info->cm_id;
1055 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1057 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1060 spin_lock_init(&cm_node->retrans_list_lock);
1061 INIT_LIST_HEAD(&cm_node->recv_list);
1062 spin_lock_init(&cm_node->recv_list_lock);
1064 cm_node->loopbackpartner = NULL;
1065 atomic_set(&cm_node->ref_count, 1);
1066 /* associate our parent CM core */
1067 cm_node->cm_core = cm_core;
1068 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1069 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1070 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1071 NES_CM_DEFAULT_RCV_WND_SCALE;
1072 ts = current_kernel_time();
1073 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1074 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1075 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1076 cm_node->tcp_cntxt.rcv_nxt = 0;
1077 /* get a unique session ID , add thread_id to an upcounter to handle race */
1078 atomic_inc(&cm_core->node_cnt);
1079 cm_node->conn_type = cm_info->conn_type;
1080 cm_node->apbvt_set = 0;
1081 cm_node->accept_pend = 0;
1083 cm_node->nesvnic = nesvnic;
1084 /* get some device handles, for arp lookup */
1085 nesdev = nesvnic->nesdev;
1086 nesadapter = nesdev->nesadapter;
1088 cm_node->loopbackpartner = NULL;
1089 /* get the mac addr for the remote node */
1090 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1091 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1093 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1095 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1102 /* copy the mac addr to node context */
1103 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1104 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %s\n",
1105 print_mac(mac, cm_node->rem_mac));
1107 add_hte_node(cm_core, cm_node);
1108 atomic_inc(&cm_nodes_created);
1115 * add_ref_cm_node - destroy an instance of a cm node
1117 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1119 atomic_inc(&cm_node->ref_count);
1125 * rem_ref_cm_node - destroy an instance of a cm node
1127 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1128 struct nes_cm_node *cm_node)
1130 unsigned long flags, qplockflags;
1131 struct nes_timer_entry *recv_entry;
1132 struct iw_cm_id *cm_id;
1133 struct list_head *list_core, *list_node_temp;
1134 struct nes_qp *nesqp;
1139 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1140 if (atomic_dec_return(&cm_node->ref_count)) {
1141 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1144 list_del(&cm_node->list);
1145 atomic_dec(&cm_core->ht_node_cnt);
1146 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1148 /* if the node is destroyed before connection was accelerated */
1149 if (!cm_node->accelerated && cm_node->accept_pend) {
1150 BUG_ON(!cm_node->listener);
1151 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1152 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1154 BUG_ON(cm_node->send_entry);
1155 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1156 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
1157 recv_entry = container_of(list_core, struct nes_timer_entry,
1159 list_del(&recv_entry->list);
1160 cm_id = cm_node->cm_id;
1161 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1162 nesqp = (struct nes_qp *)recv_entry->skb;
1163 spin_lock_irqsave(&nesqp->lock, qplockflags);
1165 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1166 "NES_TIMER_TYPE_CLOSE with something to do!\n",
1167 nesqp->hwqp.qp_id, cm_id);
1168 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1169 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1170 nesqp->ibqp_state = IB_QPS_ERR;
1171 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1172 nes_cm_disconn(nesqp);
1174 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1175 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1176 "NES_TIMER_TYPE_CLOSE with nothing to do!\n",
1177 nesqp->hwqp.qp_id, cm_id);
1179 cm_id->rem_ref(cm_id);
1182 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1184 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1186 if (cm_node->listener) {
1187 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1189 if (cm_node->apbvt_set && cm_node->nesvnic) {
1190 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1192 cm_node->nesvnic->nesdev->pcidev->devfn),
1193 NES_MANAGE_APBVT_DEL);
1197 atomic_dec(&cm_core->node_cnt);
1198 atomic_inc(&cm_nodes_destroyed);
1199 nesqp = cm_node->nesqp;
1201 nesqp->cm_node = NULL;
1202 nes_rem_ref(&nesqp->ibqp);
1203 cm_node->nesqp = NULL;
1214 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1215 u32 optionsize, u32 syn_packet)
1219 union all_known_options *all_options;
1220 char got_mss_option = 0;
1222 while (offset < optionsize) {
1223 all_options = (union all_known_options *)(optionsloc + offset);
1224 switch (all_options->as_base.optionnum) {
1225 case OPTION_NUMBER_END:
1226 offset = optionsize;
1228 case OPTION_NUMBER_NONE:
1231 case OPTION_NUMBER_MSS:
1232 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1233 "Size: %d\n", __func__,
1234 all_options->as_mss.length, offset, optionsize);
1236 if (all_options->as_mss.length != 4) {
1239 tmp = ntohs(all_options->as_mss.mss);
1240 if (tmp > 0 && tmp <
1241 cm_node->tcp_cntxt.mss)
1242 cm_node->tcp_cntxt.mss = tmp;
1245 case OPTION_NUMBER_WINDOW_SCALE:
1246 cm_node->tcp_cntxt.snd_wscale =
1247 all_options->as_windowscale.shiftcount;
1249 case OPTION_NUMBER_WRITE0:
1250 cm_node->send_write0 = 1;
1253 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1254 all_options->as_base.optionnum);
1257 offset += all_options->as_base.length;
1259 if ((!got_mss_option) && (syn_packet))
1260 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1264 static void drop_packet(struct sk_buff *skb)
1266 atomic_inc(&cm_accel_dropped_pkts);
1267 dev_kfree_skb_any(skb);
1270 static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1271 struct tcphdr *tcph)
1273 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1274 "refcnt=%d\n", cm_node, cm_node->state,
1275 atomic_read(&cm_node->ref_count));
1276 cm_node->tcp_cntxt.rcv_nxt++;
1277 cleanup_retrans_entry(cm_node);
1278 switch (cm_node->state) {
1279 case NES_CM_STATE_SYN_RCVD:
1280 case NES_CM_STATE_SYN_SENT:
1281 case NES_CM_STATE_ESTABLISHED:
1282 case NES_CM_STATE_MPAREQ_SENT:
1283 cm_node->state = NES_CM_STATE_LAST_ACK;
1284 send_fin(cm_node, skb);
1286 case NES_CM_STATE_FIN_WAIT1:
1287 cm_node->state = NES_CM_STATE_CLOSING;
1288 send_ack(cm_node, skb);
1290 case NES_CM_STATE_FIN_WAIT2:
1291 cm_node->state = NES_CM_STATE_TIME_WAIT;
1292 send_ack(cm_node, skb);
1293 cm_node->state = NES_CM_STATE_CLOSED;
1295 case NES_CM_STATE_TSA:
1297 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1298 cm_node, cm_node->state);
1305 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1306 struct tcphdr *tcph)
1309 int reset = 0; /* whether to send reset in case of err.. */
1311 atomic_inc(&cm_resets_recvd);
1312 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1313 " refcnt=%d\n", cm_node, cm_node->state,
1314 atomic_read(&cm_node->ref_count));
1315 cleanup_retrans_entry(cm_node);
1316 switch (cm_node->state) {
1317 case NES_CM_STATE_SYN_SENT:
1318 case NES_CM_STATE_MPAREQ_SENT:
1319 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1320 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1321 cm_node->listener, cm_node->state);
1322 active_open_err(cm_node, skb, reset);
1324 case NES_CM_STATE_MPAREQ_RCVD:
1325 passive_state = atomic_add_return(1, &cm_node->passive_state);
1326 if (passive_state == NES_SEND_RESET_EVENT)
1327 create_event(cm_node, NES_CM_EVENT_RESET);
1328 cleanup_retrans_entry(cm_node);
1329 cm_node->state = NES_CM_STATE_CLOSED;
1330 dev_kfree_skb_any(skb);
1332 case NES_CM_STATE_ESTABLISHED:
1333 case NES_CM_STATE_SYN_RCVD:
1334 case NES_CM_STATE_LISTENING:
1335 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1336 passive_open_err(cm_node, skb, reset);
1338 case NES_CM_STATE_TSA:
1339 active_open_err(cm_node, skb, reset);
1341 case NES_CM_STATE_CLOSED:
1342 cleanup_retrans_entry(cm_node);
1351 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb,
1352 enum nes_cm_event_type type)
1356 int datasize = skb->len;
1357 u8 *dataloc = skb->data;
1358 ret = parse_mpa(cm_node, dataloc, datasize);
1360 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1361 if (type == NES_CM_EVENT_CONNECTED) {
1362 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1363 "cm_node=%p listener=%p state=%d\n", __func__,
1364 __LINE__, cm_node, cm_node->listener,
1366 active_open_err(cm_node, skb, 1);
1368 passive_open_err(cm_node, skb, 1);
1371 cleanup_retrans_entry(cm_node);
1372 dev_kfree_skb_any(skb);
1373 if (type == NES_CM_EVENT_CONNECTED)
1374 cm_node->state = NES_CM_STATE_TSA;
1376 atomic_set(&cm_node->passive_state,
1377 NES_PASSIVE_STATE_INDICATED);
1378 create_event(cm_node, type);
1384 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1386 switch (cm_node->state) {
1387 case NES_CM_STATE_SYN_SENT:
1388 case NES_CM_STATE_MPAREQ_SENT:
1389 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1390 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1391 cm_node->listener, cm_node->state);
1392 active_open_err(cm_node, skb, 1);
1394 case NES_CM_STATE_ESTABLISHED:
1395 case NES_CM_STATE_SYN_RCVD:
1396 passive_open_err(cm_node, skb, 1);
1398 case NES_CM_STATE_TSA:
1404 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1405 struct sk_buff *skb)
1409 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1411 active_open_err(cm_node, skb, 1);
1416 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1417 struct sk_buff *skb)
1422 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1423 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1425 seq = ntohl(tcph->seq);
1426 ack_seq = ntohl(tcph->ack_seq);
1427 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1428 if (ack_seq != loc_seq_num)
1430 else if ((seq + rcv_wnd) < rcv_nxt)
1433 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1434 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1435 cm_node->listener, cm_node->state);
1436 indicate_pkt_err(cm_node, skb);
1437 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1438 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1445 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1446 * is created with a listener or it may comein as rexmitted packet which in
1447 * that case will be just dropped.
1450 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1451 struct tcphdr *tcph)
1457 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1459 inc_sequence = ntohl(tcph->seq);
1461 switch (cm_node->state) {
1462 case NES_CM_STATE_SYN_SENT:
1463 case NES_CM_STATE_MPAREQ_SENT:
1464 /* Rcvd syn on active open connection*/
1465 active_open_err(cm_node, skb, 1);
1467 case NES_CM_STATE_LISTENING:
1469 cm_node->accept_pend = 1;
1470 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1471 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1472 cm_node->listener->backlog) {
1473 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1476 passive_open_err(cm_node, skb, 0);
1479 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1482 passive_open_err(cm_node, skb, 0);
1486 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1487 BUG_ON(cm_node->send_entry);
1488 cm_node->state = NES_CM_STATE_SYN_RCVD;
1489 send_syn(cm_node, 1, skb);
1491 case NES_CM_STATE_CLOSED:
1492 cleanup_retrans_entry(cm_node);
1493 send_reset(cm_node, skb);
1495 case NES_CM_STATE_TSA:
1496 case NES_CM_STATE_ESTABLISHED:
1497 case NES_CM_STATE_FIN_WAIT1:
1498 case NES_CM_STATE_FIN_WAIT2:
1499 case NES_CM_STATE_MPAREQ_RCVD:
1500 case NES_CM_STATE_LAST_ACK:
1501 case NES_CM_STATE_CLOSING:
1502 case NES_CM_STATE_UNKNOWN:
1509 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1510 struct tcphdr *tcph)
1517 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1519 inc_sequence = ntohl(tcph->seq);
1520 switch (cm_node->state) {
1521 case NES_CM_STATE_SYN_SENT:
1523 if (check_syn(cm_node, tcph, skb))
1525 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1527 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1529 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1533 cleanup_retrans_entry(cm_node);
1534 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1535 send_mpa_request(cm_node, skb);
1536 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1538 case NES_CM_STATE_MPAREQ_RCVD:
1539 /* passive open, so should not be here */
1540 passive_open_err(cm_node, skb, 1);
1542 case NES_CM_STATE_LISTENING:
1543 case NES_CM_STATE_CLOSED:
1544 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1545 cleanup_retrans_entry(cm_node);
1546 send_reset(cm_node, skb);
1548 case NES_CM_STATE_ESTABLISHED:
1549 case NES_CM_STATE_FIN_WAIT1:
1550 case NES_CM_STATE_FIN_WAIT2:
1551 case NES_CM_STATE_LAST_ACK:
1552 case NES_CM_STATE_TSA:
1553 case NES_CM_STATE_CLOSING:
1554 case NES_CM_STATE_UNKNOWN:
1555 case NES_CM_STATE_MPAREQ_SENT:
1562 static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1563 struct tcphdr *tcph)
1571 u32 temp_seq = cm_node->tcp_cntxt.loc_seq_num;
1573 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1574 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1576 if (check_seq(cm_node, tcph, skb))
1579 skb_pull(skb, tcph->doff << 2);
1580 inc_sequence = ntohl(tcph->seq);
1581 rem_seq = ntohl(tcph->seq);
1582 rem_seq_ack = ntohl(tcph->ack_seq);
1583 datasize = skb->len;
1585 switch (cm_node->state) {
1586 case NES_CM_STATE_SYN_RCVD:
1588 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1591 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1592 cm_node->tcp_cntxt.loc_seq_num = temp_seq;
1593 if (cm_node->tcp_cntxt.rem_ack_num !=
1594 cm_node->tcp_cntxt.loc_seq_num) {
1595 nes_debug(NES_DBG_CM, "rem_ack_num != loc_seq_num\n");
1596 cleanup_retrans_entry(cm_node);
1597 send_reset(cm_node, skb);
1600 cm_node->state = NES_CM_STATE_ESTABLISHED;
1602 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1603 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1604 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ);
1605 } else { /* rcvd ACK only */
1606 dev_kfree_skb_any(skb);
1607 cleanup_retrans_entry(cm_node);
1610 case NES_CM_STATE_ESTABLISHED:
1612 /* We expect mpa frame to be received only */
1614 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1615 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1616 handle_rcv_mpa(cm_node, skb,
1617 NES_CM_EVENT_MPA_REQ);
1621 case NES_CM_STATE_MPAREQ_SENT:
1622 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1624 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1625 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED);
1626 } else { /* Could be just an ack pkt.. */
1627 cleanup_retrans_entry(cm_node);
1628 dev_kfree_skb_any(skb);
1631 case NES_CM_STATE_LISTENING:
1632 case NES_CM_STATE_CLOSED:
1633 cleanup_retrans_entry(cm_node);
1634 send_reset(cm_node, skb);
1636 case NES_CM_STATE_FIN_WAIT1:
1637 case NES_CM_STATE_SYN_SENT:
1638 case NES_CM_STATE_FIN_WAIT2:
1639 case NES_CM_STATE_TSA:
1640 case NES_CM_STATE_MPAREQ_RCVD:
1641 case NES_CM_STATE_LAST_ACK:
1642 case NES_CM_STATE_CLOSING:
1643 case NES_CM_STATE_UNKNOWN:
1652 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1653 struct sk_buff *skb, int optionsize, int passive)
1655 u8 *optionsloc = (u8 *)&tcph[1];
1657 if (process_options(cm_node, optionsloc, optionsize,
1659 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1662 passive_open_err(cm_node, skb, 1);
1664 active_open_err(cm_node, skb, 1);
1669 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1670 cm_node->tcp_cntxt.snd_wscale;
1672 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1673 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1678 * active_open_err() will send reset() if flag set..
1679 * It will also send ABORT event.
1682 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1685 cleanup_retrans_entry(cm_node);
1687 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1688 "state=%d\n", cm_node, cm_node->state);
1689 add_ref_cm_node(cm_node);
1690 send_reset(cm_node, skb);
1692 dev_kfree_skb_any(skb);
1694 cm_node->state = NES_CM_STATE_CLOSED;
1695 create_event(cm_node, NES_CM_EVENT_ABORTED);
1699 * passive_open_err() will either do a reset() or will free up the skb and
1700 * remove the cm_node.
1703 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1706 cleanup_retrans_entry(cm_node);
1707 cm_node->state = NES_CM_STATE_CLOSED;
1709 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1710 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1711 send_reset(cm_node, skb);
1713 dev_kfree_skb_any(skb);
1714 rem_ref_cm_node(cm_node->cm_core, cm_node);
1719 * free_retrans_entry() routines assumes that the retrans_list_lock has
1720 * been acquired before calling.
1722 static void free_retrans_entry(struct nes_cm_node *cm_node)
1724 struct nes_timer_entry *send_entry;
1725 send_entry = cm_node->send_entry;
1727 cm_node->send_entry = NULL;
1728 dev_kfree_skb_any(send_entry->skb);
1730 rem_ref_cm_node(cm_node->cm_core, cm_node);
1734 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1736 unsigned long flags;
1738 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1739 free_retrans_entry(cm_node);
1740 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1745 * Returns skb if to be freed, else it will return NULL if already used..
1747 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1748 struct nes_cm_core *cm_core)
1750 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1751 struct tcphdr *tcph = tcp_hdr(skb);
1752 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1754 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1755 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1756 tcph->ack, tcph->rst, tcph->fin);
1759 pkt_type = NES_PKT_TYPE_RST;
1760 else if (tcph->syn) {
1761 pkt_type = NES_PKT_TYPE_SYN;
1763 pkt_type = NES_PKT_TYPE_SYNACK;
1764 } else if (tcph->fin)
1765 pkt_type = NES_PKT_TYPE_FIN;
1767 pkt_type = NES_PKT_TYPE_ACK;
1770 case NES_PKT_TYPE_SYN:
1771 handle_syn_pkt(cm_node, skb, tcph);
1773 case NES_PKT_TYPE_SYNACK:
1774 handle_synack_pkt(cm_node, skb, tcph);
1776 case NES_PKT_TYPE_ACK:
1777 handle_ack_pkt(cm_node, skb, tcph);
1779 case NES_PKT_TYPE_RST:
1780 handle_rst_pkt(cm_node, skb, tcph);
1782 case NES_PKT_TYPE_FIN:
1783 handle_fin_pkt(cm_node, skb, tcph);
1792 * mini_cm_listen - create a listen node with params
1794 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1795 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1797 struct nes_cm_listener *listener;
1798 unsigned long flags;
1800 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1801 cm_info->loc_addr, cm_info->loc_port);
1803 /* cannot have multiple matching listeners */
1804 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1805 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1806 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1807 /* find automatically incs ref count ??? */
1808 atomic_dec(&listener->ref_count);
1809 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1814 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1815 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1817 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1821 listener->loc_addr = htonl(cm_info->loc_addr);
1822 listener->loc_port = htons(cm_info->loc_port);
1823 listener->reused_node = 0;
1825 atomic_set(&listener->ref_count, 1);
1828 /* find already inc'ed the ref count */
1830 listener->reused_node = 1;
1833 listener->cm_id = cm_info->cm_id;
1834 atomic_set(&listener->pend_accepts_cnt, 0);
1835 listener->cm_core = cm_core;
1836 listener->nesvnic = nesvnic;
1837 atomic_inc(&cm_core->node_cnt);
1839 listener->conn_type = cm_info->conn_type;
1840 listener->backlog = cm_info->backlog;
1841 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1843 if (!listener->reused_node) {
1844 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1845 list_add(&listener->list, &cm_core->listen_list.list);
1846 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1847 atomic_inc(&cm_core->listen_node_cnt);
1850 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1851 " listener = %p, backlog = %d, cm_id = %p.\n",
1852 cm_info->loc_addr, cm_info->loc_port,
1853 listener, listener->backlog, listener->cm_id);
1860 * mini_cm_connect - make a connection node with params
1862 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1863 struct nes_vnic *nesvnic, u16 private_data_len,
1864 void *private_data, struct nes_cm_info *cm_info)
1867 struct nes_cm_node *cm_node;
1868 struct nes_cm_listener *loopbackremotelistener;
1869 struct nes_cm_node *loopbackremotenode;
1870 struct nes_cm_info loopback_cm_info;
1871 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
1872 struct ietf_mpa_frame *mpa_frame = NULL;
1874 /* create a CM connection node */
1875 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1878 mpa_frame = &cm_node->mpa_frame;
1879 strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ);
1880 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
1881 mpa_frame->rev = IETF_MPA_VERSION;
1882 mpa_frame->priv_data_len = htons(private_data_len);
1884 /* set our node side to client (active) side */
1885 cm_node->tcp_cntxt.client = 1;
1886 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1888 if (cm_info->loc_addr == cm_info->rem_addr) {
1889 loopbackremotelistener = find_listener(cm_core,
1890 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
1891 NES_CM_LISTENER_ACTIVE_STATE);
1892 if (loopbackremotelistener == NULL) {
1893 create_event(cm_node, NES_CM_EVENT_ABORTED);
1895 atomic_inc(&cm_loopbacks);
1896 loopback_cm_info = *cm_info;
1897 loopback_cm_info.loc_port = cm_info->rem_port;
1898 loopback_cm_info.rem_port = cm_info->loc_port;
1899 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
1900 loopbackremotenode = make_cm_node(cm_core, nesvnic,
1901 &loopback_cm_info, loopbackremotelistener);
1902 loopbackremotenode->loopbackpartner = cm_node;
1903 loopbackremotenode->tcp_cntxt.rcv_wscale =
1904 NES_CM_DEFAULT_RCV_WND_SCALE;
1905 cm_node->loopbackpartner = loopbackremotenode;
1906 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
1908 loopbackremotenode->mpa_frame_size = private_data_len;
1910 /* we are done handling this state. */
1911 /* set node to a TSA state */
1912 cm_node->state = NES_CM_STATE_TSA;
1913 cm_node->tcp_cntxt.rcv_nxt =
1914 loopbackremotenode->tcp_cntxt.loc_seq_num;
1915 loopbackremotenode->tcp_cntxt.rcv_nxt =
1916 cm_node->tcp_cntxt.loc_seq_num;
1917 cm_node->tcp_cntxt.max_snd_wnd =
1918 loopbackremotenode->tcp_cntxt.rcv_wnd;
1919 loopbackremotenode->tcp_cntxt.max_snd_wnd =
1920 cm_node->tcp_cntxt.rcv_wnd;
1921 cm_node->tcp_cntxt.snd_wnd =
1922 loopbackremotenode->tcp_cntxt.rcv_wnd;
1923 loopbackremotenode->tcp_cntxt.snd_wnd =
1924 cm_node->tcp_cntxt.rcv_wnd;
1925 cm_node->tcp_cntxt.snd_wscale =
1926 loopbackremotenode->tcp_cntxt.rcv_wscale;
1927 loopbackremotenode->tcp_cntxt.snd_wscale =
1928 cm_node->tcp_cntxt.rcv_wscale;
1930 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1935 /* set our node side to client (active) side */
1936 cm_node->tcp_cntxt.client = 1;
1937 /* init our MPA frame ptr */
1938 memcpy(mpa_frame->priv_data, private_data, private_data_len);
1940 cm_node->mpa_frame_size = mpa_frame_size;
1942 /* send a syn and goto syn sent state */
1943 cm_node->state = NES_CM_STATE_SYN_SENT;
1944 ret = send_syn(cm_node, 0, NULL);
1947 /* error in sending the syn free up the cm_node struct */
1948 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
1949 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
1950 cm_node->rem_addr, cm_node->rem_port, cm_node,
1952 rem_ref_cm_node(cm_node->cm_core, cm_node);
1957 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
1958 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
1959 cm_node->rem_addr, cm_node->rem_port, cm_node,
1967 * mini_cm_accept - accept a connection
1968 * This function is never called
1970 static int mini_cm_accept(struct nes_cm_core *cm_core,
1971 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
1978 * mini_cm_reject - reject and teardown a connection
1980 static int mini_cm_reject(struct nes_cm_core *cm_core,
1981 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
1986 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
1987 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
1989 if (cm_node->tcp_cntxt.client)
1991 cleanup_retrans_entry(cm_node);
1993 passive_state = atomic_add_return(1, &cm_node->passive_state);
1994 cm_node->state = NES_CM_STATE_CLOSED;
1995 if (passive_state == NES_SEND_RESET_EVENT)
1996 rem_ref_cm_node(cm_core, cm_node);
1998 ret = send_reset(cm_node, NULL);
2006 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2010 if (!cm_core || !cm_node)
2013 switch (cm_node->state) {
2014 case NES_CM_STATE_SYN_RCVD:
2015 case NES_CM_STATE_SYN_SENT:
2016 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2017 case NES_CM_STATE_ESTABLISHED:
2018 case NES_CM_STATE_ACCEPTING:
2019 case NES_CM_STATE_MPAREQ_SENT:
2020 case NES_CM_STATE_MPAREQ_RCVD:
2021 cleanup_retrans_entry(cm_node);
2022 send_reset(cm_node, NULL);
2024 case NES_CM_STATE_CLOSE_WAIT:
2025 cm_node->state = NES_CM_STATE_LAST_ACK;
2026 send_fin(cm_node, NULL);
2028 case NES_CM_STATE_FIN_WAIT1:
2029 case NES_CM_STATE_FIN_WAIT2:
2030 case NES_CM_STATE_LAST_ACK:
2031 case NES_CM_STATE_TIME_WAIT:
2032 case NES_CM_STATE_CLOSING:
2035 case NES_CM_STATE_LISTENING:
2036 case NES_CM_STATE_UNKNOWN:
2037 case NES_CM_STATE_INITED:
2038 case NES_CM_STATE_CLOSED:
2039 ret = rem_ref_cm_node(cm_core, cm_node);
2041 case NES_CM_STATE_TSA:
2042 if (cm_node->send_entry)
2043 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2044 "send_entry=%p\n", cm_node->send_entry);
2045 ret = rem_ref_cm_node(cm_core, cm_node);
2053 * recv_pkt - recv an ETHERNET packet, and process it through CM
2054 * node state machine
2056 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2057 struct nes_vnic *nesvnic, struct sk_buff *skb)
2059 struct nes_cm_node *cm_node = NULL;
2060 struct nes_cm_listener *listener = NULL;
2062 struct tcphdr *tcph;
2063 struct nes_cm_info nfo;
2064 int skb_handled = 1;
2068 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2072 iph = (struct iphdr *)skb->data;
2073 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2075 nfo.loc_addr = ntohl(iph->daddr);
2076 nfo.loc_port = ntohs(tcph->dest);
2077 nfo.rem_addr = ntohl(iph->saddr);
2078 nfo.rem_port = ntohs(tcph->source);
2080 nes_debug(NES_DBG_CM, "Received packet: dest=" NIPQUAD_FMT
2081 ":0x%04X src=" NIPQUAD_FMT ":0x%04X\n",
2082 NIPQUAD(iph->daddr), tcph->dest,
2083 NIPQUAD(iph->saddr), tcph->source);
2086 cm_node = find_node(cm_core,
2087 nfo.rem_port, nfo.rem_addr,
2088 nfo.loc_port, nfo.loc_addr);
2091 /* Only type of packet accepted are for */
2092 /* the PASSIVE open (syn only) */
2093 if ((!tcph->syn) || (tcph->ack)) {
2097 listener = find_listener(cm_core, nfo.loc_addr,
2099 NES_CM_LISTENER_ACTIVE_STATE);
2103 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2107 nfo.cm_id = listener->cm_id;
2108 nfo.conn_type = listener->conn_type;
2109 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2112 nes_debug(NES_DBG_CM, "Unable to allocate "
2114 cm_packets_dropped++;
2115 atomic_dec(&listener->ref_count);
2116 dev_kfree_skb_any(skb);
2119 if (!tcph->rst && !tcph->fin) {
2120 cm_node->state = NES_CM_STATE_LISTENING;
2122 cm_packets_dropped++;
2123 rem_ref_cm_node(cm_core, cm_node);
2124 dev_kfree_skb_any(skb);
2127 add_ref_cm_node(cm_node);
2128 } else if (cm_node->state == NES_CM_STATE_TSA) {
2129 rem_ref_cm_node(cm_core, cm_node);
2130 atomic_inc(&cm_accel_dropped_pkts);
2131 dev_kfree_skb_any(skb);
2134 skb_reset_network_header(skb);
2135 skb_set_transport_header(skb, sizeof(*tcph));
2136 skb->len = ntohs(iph->tot_len);
2137 process_packet(cm_node, skb, cm_core);
2138 rem_ref_cm_node(cm_core, cm_node);
2145 * nes_cm_alloc_core - allocate a top level instance of a cm core
2147 static struct nes_cm_core *nes_cm_alloc_core(void)
2149 struct nes_cm_core *cm_core;
2151 /* setup the CM core */
2152 /* alloc top level core control structure */
2153 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2157 INIT_LIST_HEAD(&cm_core->connected_nodes);
2158 init_timer(&cm_core->tcp_timer);
2159 cm_core->tcp_timer.function = nes_cm_timer_tick;
2161 cm_core->mtu = NES_CM_DEFAULT_MTU;
2162 cm_core->state = NES_CM_STATE_INITED;
2163 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2165 atomic_set(&cm_core->events_posted, 0);
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 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2396 nes_debug(NES_DBG_CM, "Generating a CM "
2397 "Disconnect Event (status reset) for "
2398 "QP%u, cm_id = %p. \n",
2399 nesqp->hwqp.qp_id, cm_id);
2401 cm_event.status = IW_CM_EVENT_STATUS_OK;
2403 cm_event.local_addr = cm_id->local_addr;
2404 cm_event.remote_addr = cm_id->remote_addr;
2405 cm_event.private_data = NULL;
2406 cm_event.private_data_len = 0;
2408 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2409 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2410 "cm_id = %p, refcount = %u.\n",
2411 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2412 nesqp->hwqp.sq_tail, cm_id,
2413 atomic_read(&nesqp->refcount));
2415 spin_unlock_irqrestore(&nesqp->lock, flags);
2416 ret = cm_id->event_handler(cm_id, &cm_event);
2418 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2419 "returned, ret=%d\n", ret);
2420 spin_lock_irqsave(&nesqp->lock, flags);
2423 nesqp->disconn_pending = 0;
2424 /* There might have been another AE while the lock was released */
2425 original_hw_tcp_state = nesqp->hw_tcp_state;
2426 original_ibqp_state = nesqp->ibqp_state;
2427 last_ae = nesqp->last_aeq;
2429 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2430 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2431 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2432 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2433 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2434 atomic_inc(&cm_closes);
2435 nesqp->cm_id = NULL;
2436 nesqp->in_disconnect = 0;
2437 spin_unlock_irqrestore(&nesqp->lock, flags);
2438 nes_disconnect(nesqp, 1);
2440 cm_id->provider_data = nesqp;
2441 /* Send up the close complete event */
2442 cm_event.event = IW_CM_EVENT_CLOSE;
2443 cm_event.status = IW_CM_EVENT_STATUS_OK;
2444 cm_event.provider_data = cm_id->provider_data;
2445 cm_event.local_addr = cm_id->local_addr;
2446 cm_event.remote_addr = cm_id->remote_addr;
2447 cm_event.private_data = NULL;
2448 cm_event.private_data_len = 0;
2450 ret = cm_id->event_handler(cm_id, &cm_event);
2452 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2455 cm_id->rem_ref(cm_id);
2457 spin_lock_irqsave(&nesqp->lock, flags);
2458 if (nesqp->flush_issued == 0) {
2459 nesqp->flush_issued = 1;
2460 spin_unlock_irqrestore(&nesqp->lock, flags);
2461 flush_wqes(nesvnic->nesdev, nesqp,
2462 NES_CQP_FLUSH_RQ, 1);
2464 spin_unlock_irqrestore(&nesqp->lock, flags);
2466 cm_id = nesqp->cm_id;
2467 spin_unlock_irqrestore(&nesqp->lock, flags);
2468 /* check to see if the inbound reset beat the outbound reset */
2469 if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
2470 nes_debug(NES_DBG_CM, "QP%u: Decing refcount "
2471 "due to inbound reset beating the "
2472 "outbound reset.\n", nesqp->hwqp.qp_id);
2476 nesqp->disconn_pending = 0;
2477 spin_unlock_irqrestore(&nesqp->lock, flags);
2487 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2490 struct nes_vnic *nesvnic;
2491 struct nes_device *nesdev;
2493 nesvnic = to_nesvnic(nesqp->ibqp.device);
2497 nesdev = nesvnic->nesdev;
2499 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2500 atomic_read(&nesvnic->netdev->refcnt));
2502 if (nesqp->active_conn) {
2504 /* indicate this connection is NOT active */
2505 nesqp->active_conn = 0;
2507 /* Need to free the Last Streaming Mode Message */
2508 if (nesqp->ietf_frame) {
2509 pci_free_consistent(nesdev->pcidev,
2510 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2511 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2515 /* close the CM node down if it is still active */
2516 if (nesqp->cm_node) {
2517 nes_debug(NES_DBG_CM, "Call close API\n");
2519 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2529 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2533 struct nes_qp *nesqp;
2534 struct nes_vnic *nesvnic;
2535 struct nes_device *nesdev;
2536 struct nes_cm_node *cm_node;
2537 struct nes_adapter *adapter;
2538 struct ib_qp_attr attr;
2539 struct iw_cm_event cm_event;
2540 struct nes_hw_qp_wqe *wqe;
2541 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));
2713 /* notify OF layer that accept event was successfull */
2714 cm_id->add_ref(cm_id);
2716 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2717 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2718 cm_event.provider_data = (void *)nesqp;
2719 cm_event.local_addr = cm_id->local_addr;
2720 cm_event.remote_addr = cm_id->remote_addr;
2721 cm_event.private_data = NULL;
2722 cm_event.private_data_len = 0;
2723 ret = cm_id->event_handler(cm_id, &cm_event);
2724 attr.qp_state = IB_QPS_RTS;
2725 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
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);
2738 passive_state = atomic_add_return(1, &cm_node->passive_state);
2739 if (passive_state == NES_SEND_RESET_EVENT)
2740 create_event(cm_node, NES_CM_EVENT_RESET);
2748 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2750 struct nes_cm_node *cm_node;
2751 struct nes_cm_core *cm_core;
2753 atomic_inc(&cm_rejects);
2754 cm_node = (struct nes_cm_node *) cm_id->provider_data;
2755 cm_core = cm_node->cm_core;
2756 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2758 strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
2759 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2761 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2762 cm_node->mpa_frame.rev = mpa_version;
2763 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2765 cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2773 * setup and launch cm connect node
2775 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2778 struct nes_qp *nesqp;
2779 struct nes_vnic *nesvnic;
2780 struct nes_device *nesdev;
2781 struct nes_cm_node *cm_node;
2782 struct nes_cm_info cm_info;
2784 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2787 nesqp = to_nesqp(ibqp);
2790 nesvnic = to_nesvnic(nesqp->ibqp.device);
2793 nesdev = nesvnic->nesdev;
2797 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
2798 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
2799 ntohl(nesvnic->local_ipaddr),
2800 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2801 ntohs(cm_id->remote_addr.sin_port),
2802 ntohl(cm_id->local_addr.sin_addr.s_addr),
2803 ntohs(cm_id->local_addr.sin_port));
2805 atomic_inc(&cm_connects);
2806 nesqp->active_conn = 1;
2808 /* cache the cm_id in the qp */
2809 nesqp->cm_id = cm_id;
2811 cm_id->provider_data = nesqp;
2813 nesqp->private_data_len = conn_param->private_data_len;
2814 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2815 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
2816 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
2817 conn_param->private_data_len);
2819 if (cm_id->local_addr.sin_addr.s_addr !=
2820 cm_id->remote_addr.sin_addr.s_addr)
2821 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2822 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2824 /* set up the connection params for the node */
2825 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
2826 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
2827 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
2828 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
2829 cm_info.cm_id = cm_id;
2830 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2832 cm_id->add_ref(cm_id);
2834 /* create a connect CM node connection */
2835 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
2836 conn_param->private_data_len, (void *)conn_param->private_data,
2839 if (cm_id->local_addr.sin_addr.s_addr !=
2840 cm_id->remote_addr.sin_addr.s_addr)
2841 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2842 PCI_FUNC(nesdev->pcidev->devfn),
2843 NES_MANAGE_APBVT_DEL);
2845 cm_id->rem_ref(cm_id);
2849 cm_node->apbvt_set = 1;
2850 nesqp->cm_node = cm_node;
2851 cm_node->nesqp = nesqp;
2852 nes_add_ref(&nesqp->ibqp);
2861 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
2863 struct nes_vnic *nesvnic;
2864 struct nes_cm_listener *cm_node;
2865 struct nes_cm_info cm_info;
2866 struct nes_adapter *adapter;
2870 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
2871 cm_id, ntohs(cm_id->local_addr.sin_port));
2873 nesvnic = to_nesvnic(cm_id->device);
2876 adapter = nesvnic->nesdev->nesadapter;
2877 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2878 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2880 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
2881 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
2883 /* setup listen params in our api call struct */
2884 cm_info.loc_addr = nesvnic->local_ipaddr;
2885 cm_info.loc_port = cm_id->local_addr.sin_port;
2886 cm_info.backlog = backlog;
2887 cm_info.cm_id = cm_id;
2889 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2892 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
2894 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
2895 __func__, __LINE__);
2899 cm_id->provider_data = cm_node;
2901 if (!cm_node->reused_node) {
2902 err = nes_manage_apbvt(nesvnic,
2903 ntohs(cm_id->local_addr.sin_port),
2904 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
2905 NES_MANAGE_APBVT_ADD);
2907 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
2909 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
2912 cm_listens_created++;
2915 cm_id->add_ref(cm_id);
2916 cm_id->provider_data = (void *)cm_node;
2924 * nes_destroy_listen
2926 int nes_destroy_listen(struct iw_cm_id *cm_id)
2928 if (cm_id->provider_data)
2929 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
2931 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
2933 cm_id->rem_ref(cm_id);
2942 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
2945 cm_packets_received++;
2946 if ((g_cm_core) && (g_cm_core->api)) {
2947 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
2949 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
2950 " cm is not setup properly.\n");
2959 * Start and init a cm core module
2961 int nes_cm_start(void)
2963 nes_debug(NES_DBG_CM, "\n");
2964 /* create the primary CM core, pass this handle to subsequent core inits */
2965 g_cm_core = nes_cm_alloc_core();
2976 * stop and dealloc all cm core instances
2978 int nes_cm_stop(void)
2980 g_cm_core->api->destroy_cm_core(g_cm_core);
2986 * cm_event_connected
2987 * handle a connected event, setup QPs and HW
2989 static void cm_event_connected(struct nes_cm_event *event)
2992 struct nes_qp *nesqp;
2993 struct nes_vnic *nesvnic;
2994 struct nes_device *nesdev;
2995 struct nes_cm_node *cm_node;
2996 struct nes_adapter *nesadapter;
2997 struct ib_qp_attr attr;
2998 struct iw_cm_id *cm_id;
2999 struct iw_cm_event cm_event;
3000 struct nes_hw_qp_wqe *wqe;
3001 struct nes_v4_quad nes_quad;
3005 /* get all our handles */
3006 cm_node = event->cm_node;
3007 cm_id = cm_node->cm_id;
3008 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3009 nesqp = (struct nes_qp *)cm_id->provider_data;
3010 nesvnic = to_nesvnic(nesqp->ibqp.device);
3011 nesdev = nesvnic->nesdev;
3012 nesadapter = nesdev->nesadapter;
3014 if (nesqp->destroyed) {
3017 atomic_inc(&cm_connecteds);
3018 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3019 " local port 0x%04X. jiffies = %lu.\n",
3021 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3022 ntohs(cm_id->remote_addr.sin_port),
3023 ntohs(cm_id->local_addr.sin_port),
3026 nes_cm_init_tsa_conn(nesqp, cm_node);
3028 /* set the QP tsa context */
3029 nesqp->nesqp_context->tcpPorts[0] =
3030 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3031 nesqp->nesqp_context->tcpPorts[1] =
3032 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3033 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3034 nesqp->nesqp_context->ip0 =
3035 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3037 nesqp->nesqp_context->ip0 =
3038 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3040 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3041 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3042 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3043 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3044 nes_arp_table(nesdev,
3045 le32_to_cpu(nesqp->nesqp_context->ip0),
3046 NULL, NES_ARP_RESOLVE) << 16);
3047 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3048 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3049 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3050 nesqp->nesqp_context->ird_ord_sizes |=
3051 cpu_to_le32((u32)1 <<
3052 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3054 /* Adjust tail for not having a LSMM */
3055 nesqp->hwqp.sq_tail = 1;
3057 #if defined(NES_SEND_FIRST_WRITE)
3058 if (cm_node->send_write0) {
3059 nes_debug(NES_DBG_CM, "Sending first write.\n");
3060 wqe = &nesqp->hwqp.sq_vbase[0];
3061 u64temp = (unsigned long)nesqp;
3062 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3063 set_wqe_64bit_value(wqe->wqe_words,
3064 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3065 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3066 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3067 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3068 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3069 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3070 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3071 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3073 /* use the reserved spot on the WQ for the extra first WQE */
3074 nesqp->nesqp_context->ird_ord_sizes &=
3075 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3076 NES_QPCONTEXT_ORDIRD_WRPDU |
3077 NES_QPCONTEXT_ORDIRD_ALSMM));
3078 nesqp->skip_lsmm = 1;
3079 nesqp->hwqp.sq_tail = 0;
3080 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3081 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3085 memset(&nes_quad, 0, sizeof(nes_quad));
3087 nes_quad.DstIpAdrIndex =
3088 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3089 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3090 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3092 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3093 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3094 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3096 /* Produce hash key */
3097 crc_value = get_crc_value(&nes_quad);
3098 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3099 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3100 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3102 nesqp->hte_index &= nesadapter->hte_index_mask;
3103 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3105 nesqp->ietf_frame = &cm_node->mpa_frame;
3106 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3107 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3109 /* notify OF layer we successfully created the requested connection */
3110 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3111 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3112 cm_event.provider_data = cm_id->provider_data;
3113 cm_event.local_addr.sin_family = AF_INET;
3114 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3115 cm_event.remote_addr = cm_id->remote_addr;
3117 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3118 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3120 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3121 ret = cm_id->event_handler(cm_id, &cm_event);
3122 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3125 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3126 "ret=%d\n", __func__, __LINE__, ret);
3127 attr.qp_state = IB_QPS_RTS;
3128 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3130 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3131 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3138 * cm_event_connect_error
3140 static void cm_event_connect_error(struct nes_cm_event *event)
3142 struct nes_qp *nesqp;
3143 struct iw_cm_id *cm_id;
3144 struct iw_cm_event cm_event;
3145 /* struct nes_cm_info cm_info; */
3148 if (!event->cm_node)
3151 cm_id = event->cm_node->cm_id;
3156 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3157 nesqp = cm_id->provider_data;
3163 /* notify OF layer about this connection error event */
3164 /* cm_id->rem_ref(cm_id); */
3165 nesqp->cm_id = NULL;
3166 cm_id->provider_data = NULL;
3167 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3168 cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
3169 cm_event.provider_data = cm_id->provider_data;
3170 cm_event.local_addr = cm_id->local_addr;
3171 cm_event.remote_addr = cm_id->remote_addr;
3172 cm_event.private_data = NULL;
3173 cm_event.private_data_len = 0;
3175 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3176 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3177 cm_event.remote_addr.sin_addr.s_addr);
3179 ret = cm_id->event_handler(cm_id, &cm_event);
3180 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3182 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3183 "ret=%d\n", __func__, __LINE__, ret);
3184 cm_id->rem_ref(cm_id);
3186 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3194 static void cm_event_reset(struct nes_cm_event *event)
3196 struct nes_qp *nesqp;
3197 struct iw_cm_id *cm_id;
3198 struct iw_cm_event cm_event;
3199 /* struct nes_cm_info cm_info; */
3202 if (!event->cm_node)
3205 if (!event->cm_node->cm_id)
3208 cm_id = event->cm_node->cm_id;
3210 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3211 nesqp = cm_id->provider_data;
3213 nesqp->cm_id = NULL;
3214 /* cm_id->provider_data = NULL; */
3215 cm_event.event = IW_CM_EVENT_DISCONNECT;
3216 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3217 cm_event.provider_data = cm_id->provider_data;
3218 cm_event.local_addr = cm_id->local_addr;
3219 cm_event.remote_addr = cm_id->remote_addr;
3220 cm_event.private_data = NULL;
3221 cm_event.private_data_len = 0;
3223 ret = cm_id->event_handler(cm_id, &cm_event);
3224 cm_id->add_ref(cm_id);
3225 atomic_inc(&cm_closes);
3226 cm_event.event = IW_CM_EVENT_CLOSE;
3227 cm_event.status = IW_CM_EVENT_STATUS_OK;
3228 cm_event.provider_data = cm_id->provider_data;
3229 cm_event.local_addr = cm_id->local_addr;
3230 cm_event.remote_addr = cm_id->remote_addr;
3231 cm_event.private_data = NULL;
3232 cm_event.private_data_len = 0;
3233 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3234 ret = cm_id->event_handler(cm_id, &cm_event);
3236 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3239 /* notify OF layer about this connection error event */
3240 cm_id->rem_ref(cm_id);
3249 static void cm_event_mpa_req(struct nes_cm_event *event)
3251 struct iw_cm_id *cm_id;
3252 struct iw_cm_event cm_event;
3254 struct nes_cm_node *cm_node;
3256 cm_node = event->cm_node;
3259 cm_id = cm_node->cm_id;
3261 atomic_inc(&cm_connect_reqs);
3262 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3263 cm_node, cm_id, jiffies);
3265 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3266 cm_event.status = IW_CM_EVENT_STATUS_OK;
3267 cm_event.provider_data = (void *)cm_node;
3269 cm_event.local_addr.sin_family = AF_INET;
3270 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3271 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3273 cm_event.remote_addr.sin_family = AF_INET;
3274 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3275 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3277 cm_event.private_data = cm_node->mpa_frame_buf;
3278 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3280 ret = cm_id->event_handler(cm_id, &cm_event);
3282 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
3283 __func__, __LINE__, ret);
3289 static void nes_cm_event_handler(struct work_struct *);
3293 * post an event to the cm event handler
3295 static int nes_cm_post_event(struct nes_cm_event *event)
3297 atomic_inc(&event->cm_node->cm_core->events_posted);
3298 add_ref_cm_node(event->cm_node);
3299 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3300 INIT_WORK(&event->event_work, nes_cm_event_handler);
3301 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3302 event->cm_node, event);
3304 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3306 nes_debug(NES_DBG_CM, "Exit\n");
3312 * nes_cm_event_handler
3313 * worker function to handle cm events
3314 * will free instance of nes_cm_event
3316 static void nes_cm_event_handler(struct work_struct *work)
3318 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3320 struct nes_cm_core *cm_core;
3322 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3325 cm_core = event->cm_node->cm_core;
3326 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3327 event, event->type, atomic_read(&cm_core->events_posted));
3329 switch (event->type) {
3330 case NES_CM_EVENT_MPA_REQ:
3331 cm_event_mpa_req(event);
3332 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3335 case NES_CM_EVENT_RESET:
3336 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3338 cm_event_reset(event);
3340 case NES_CM_EVENT_CONNECTED:
3341 if ((!event->cm_node->cm_id) ||
3342 (event->cm_node->state != NES_CM_STATE_TSA))
3344 cm_event_connected(event);
3345 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3347 case NES_CM_EVENT_ABORTED:
3348 if ((!event->cm_node->cm_id) ||
3349 (event->cm_node->state == NES_CM_STATE_TSA))
3351 cm_event_connect_error(event);
3352 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3354 case NES_CM_EVENT_DROPPED_PKT:
3355 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3358 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3362 atomic_dec(&cm_core->events_posted);
3363 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3364 rem_ref_cm_node(cm_core, event->cm_node);