2 * Copyright (c) 2006 - 2009 Intel-NE, 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 /* walk list and find cm_node associated with this session ID */
786 spin_lock_irqsave(&cm_core->ht_lock, flags);
787 list_for_each_entry(cm_node, hte, list) {
788 /* compare quad, return node handle if a match */
789 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
790 cm_node->loc_addr, cm_node->loc_port,
792 cm_node->rem_addr, cm_node->rem_port,
794 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
795 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
796 add_ref_cm_node(cm_node);
797 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
801 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
809 * find_listener - find a cm node listening on this addr-port pair
811 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
812 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
815 struct nes_cm_listener *listen_node;
816 __be32 tmp_addr = cpu_to_be32(dst_addr);
818 /* walk list and find cm_node associated with this session ID */
819 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
820 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
821 /* compare node pair, return node handle if a match */
822 if (((listen_node->loc_addr == dst_addr) ||
823 listen_node->loc_addr == 0x00000000) &&
824 (listen_node->loc_port == dst_port) &&
825 (listener_state & listen_node->listener_state)) {
826 atomic_inc(&listen_node->ref_count);
827 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
831 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
833 nes_debug(NES_DBG_CM, "Unable to find listener for %pI4:%x\n",
834 &tmp_addr, dst_port);
842 * add_hte_node - add a cm node to the hash table
844 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
847 struct list_head *hte;
849 if (!cm_node || !cm_core)
852 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
855 spin_lock_irqsave(&cm_core->ht_lock, flags);
857 /* get a handle on the hash table element (list head for this slot) */
858 hte = &cm_core->connected_nodes;
859 list_add_tail(&cm_node->list, hte);
860 atomic_inc(&cm_core->ht_node_cnt);
862 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
869 * mini_cm_dec_refcnt_listen
871 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
872 struct nes_cm_listener *listener, int free_hanging_nodes)
876 struct list_head *list_pos = NULL;
877 struct list_head *list_temp = NULL;
878 struct nes_cm_node *cm_node = NULL;
879 struct list_head reset_list;
881 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
882 "refcnt=%d\n", listener, free_hanging_nodes,
883 atomic_read(&listener->ref_count));
884 /* free non-accelerated child nodes for this listener */
885 INIT_LIST_HEAD(&reset_list);
886 if (free_hanging_nodes) {
887 spin_lock_irqsave(&cm_core->ht_lock, flags);
888 list_for_each_safe(list_pos, list_temp,
889 &g_cm_core->connected_nodes) {
890 cm_node = container_of(list_pos, struct nes_cm_node,
892 if ((cm_node->listener == listener) &&
893 (!cm_node->accelerated)) {
894 add_ref_cm_node(cm_node);
895 list_add(&cm_node->reset_entry, &reset_list);
898 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
901 list_for_each_safe(list_pos, list_temp, &reset_list) {
902 cm_node = container_of(list_pos, struct nes_cm_node,
904 cleanup_retrans_entry(cm_node);
905 send_reset(cm_node, NULL);
906 rem_ref_cm_node(cm_node->cm_core, cm_node);
909 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
910 if (!atomic_dec_return(&listener->ref_count)) {
911 list_del(&listener->list);
913 /* decrement our listen node count */
914 atomic_dec(&cm_core->listen_node_cnt);
916 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
918 if (listener->nesvnic) {
919 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
920 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
923 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
928 cm_listens_destroyed++;
930 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
933 if (atomic_read(&listener->pend_accepts_cnt) > 0)
934 nes_debug(NES_DBG_CM, "destroying listener (%p)"
935 " with non-zero pending accepts=%u\n",
936 listener, atomic_read(&listener->pend_accepts_cnt));
946 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
947 struct nes_cm_listener *listener)
949 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
950 listener->cm_id = NULL; /* going to be destroyed pretty soon */
951 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
956 * mini_cm_accelerated
958 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
959 struct nes_cm_node *cm_node)
962 cm_node->accelerated = 1;
964 if (cm_node->accept_pend) {
965 BUG_ON(!cm_node->listener);
966 atomic_dec(&cm_node->listener->pend_accepts_cnt);
967 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
970 was_timer_set = timer_pending(&cm_core->tcp_timer);
971 if (!was_timer_set) {
972 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
973 add_timer(&cm_core->tcp_timer);
981 * nes_addr_resolve_neigh
983 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
987 struct neighbour *neigh;
990 memset(&fl, 0, sizeof fl);
991 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
992 if (ip_route_output_key(&init_net, &rt, &fl)) {
993 printk("%s: ip_route_output_key failed for 0x%08X\n",
998 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1000 if (neigh->nud_state & NUD_VALID) {
1001 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1002 " is %pM, Gateway is 0x%08X \n", dst_ip,
1003 neigh->ha, ntohl(rt->rt_gateway));
1004 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1005 dst_ip, NES_ARP_ADD);
1006 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1009 neigh_release(neigh);
1012 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1013 neigh_event_send(rt->u.dst.neighbour, NULL);
1021 * make_cm_node - create a new instance of a cm node
1023 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1024 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1025 struct nes_cm_listener *listener)
1027 struct nes_cm_node *cm_node;
1030 struct nes_device *nesdev;
1031 struct nes_adapter *nesadapter;
1033 /* create an hte and cm_node for this instance */
1034 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1038 /* set our node specific transport info */
1039 cm_node->loc_addr = cm_info->loc_addr;
1040 cm_node->rem_addr = cm_info->rem_addr;
1041 cm_node->loc_port = cm_info->loc_port;
1042 cm_node->rem_port = cm_info->rem_port;
1043 cm_node->send_write0 = send_first;
1044 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1045 &cm_node->loc_addr, cm_node->loc_port,
1046 &cm_node->rem_addr, cm_node->rem_port);
1047 cm_node->listener = listener;
1048 cm_node->netdev = nesvnic->netdev;
1049 cm_node->cm_id = cm_info->cm_id;
1050 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1052 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1055 spin_lock_init(&cm_node->retrans_list_lock);
1056 INIT_LIST_HEAD(&cm_node->recv_list);
1057 spin_lock_init(&cm_node->recv_list_lock);
1059 cm_node->loopbackpartner = NULL;
1060 atomic_set(&cm_node->ref_count, 1);
1061 /* associate our parent CM core */
1062 cm_node->cm_core = cm_core;
1063 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1064 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1065 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1066 NES_CM_DEFAULT_RCV_WND_SCALE;
1067 ts = current_kernel_time();
1068 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1069 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1070 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1071 cm_node->tcp_cntxt.rcv_nxt = 0;
1072 /* get a unique session ID , add thread_id to an upcounter to handle race */
1073 atomic_inc(&cm_core->node_cnt);
1074 cm_node->conn_type = cm_info->conn_type;
1075 cm_node->apbvt_set = 0;
1076 cm_node->accept_pend = 0;
1078 cm_node->nesvnic = nesvnic;
1079 /* get some device handles, for arp lookup */
1080 nesdev = nesvnic->nesdev;
1081 nesadapter = nesdev->nesadapter;
1083 cm_node->loopbackpartner = NULL;
1084 /* get the mac addr for the remote node */
1085 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1086 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1088 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1090 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1097 /* copy the mac addr to node context */
1098 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1099 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1102 add_hte_node(cm_core, cm_node);
1103 atomic_inc(&cm_nodes_created);
1110 * add_ref_cm_node - destroy an instance of a cm node
1112 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1114 atomic_inc(&cm_node->ref_count);
1120 * rem_ref_cm_node - destroy an instance of a cm node
1122 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1123 struct nes_cm_node *cm_node)
1125 unsigned long flags, qplockflags;
1126 struct nes_timer_entry *recv_entry;
1127 struct iw_cm_id *cm_id;
1128 struct list_head *list_core, *list_node_temp;
1129 struct nes_qp *nesqp;
1134 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1135 if (atomic_dec_return(&cm_node->ref_count)) {
1136 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1139 list_del(&cm_node->list);
1140 atomic_dec(&cm_core->ht_node_cnt);
1141 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1143 /* if the node is destroyed before connection was accelerated */
1144 if (!cm_node->accelerated && cm_node->accept_pend) {
1145 BUG_ON(!cm_node->listener);
1146 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1147 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1149 BUG_ON(cm_node->send_entry);
1150 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1151 list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
1152 recv_entry = container_of(list_core, struct nes_timer_entry,
1154 list_del(&recv_entry->list);
1155 cm_id = cm_node->cm_id;
1156 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1157 nesqp = (struct nes_qp *)recv_entry->skb;
1158 spin_lock_irqsave(&nesqp->lock, qplockflags);
1160 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1161 "NES_TIMER_TYPE_CLOSE with something to do!\n",
1162 nesqp->hwqp.qp_id, cm_id);
1163 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1164 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1165 nesqp->ibqp_state = IB_QPS_ERR;
1166 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1167 nes_cm_disconn(nesqp);
1169 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1170 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1171 "NES_TIMER_TYPE_CLOSE with nothing to do!\n",
1172 nesqp->hwqp.qp_id, cm_id);
1174 cm_id->rem_ref(cm_id);
1177 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1179 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1181 if (cm_node->listener) {
1182 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1184 if (cm_node->apbvt_set && cm_node->nesvnic) {
1185 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1187 cm_node->nesvnic->nesdev->pcidev->devfn),
1188 NES_MANAGE_APBVT_DEL);
1192 atomic_dec(&cm_core->node_cnt);
1193 atomic_inc(&cm_nodes_destroyed);
1194 nesqp = cm_node->nesqp;
1196 nesqp->cm_node = NULL;
1197 nes_rem_ref(&nesqp->ibqp);
1198 cm_node->nesqp = NULL;
1209 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1210 u32 optionsize, u32 syn_packet)
1214 union all_known_options *all_options;
1215 char got_mss_option = 0;
1217 while (offset < optionsize) {
1218 all_options = (union all_known_options *)(optionsloc + offset);
1219 switch (all_options->as_base.optionnum) {
1220 case OPTION_NUMBER_END:
1221 offset = optionsize;
1223 case OPTION_NUMBER_NONE:
1226 case OPTION_NUMBER_MSS:
1227 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1228 "Size: %d\n", __func__,
1229 all_options->as_mss.length, offset, optionsize);
1231 if (all_options->as_mss.length != 4) {
1234 tmp = ntohs(all_options->as_mss.mss);
1235 if (tmp > 0 && tmp <
1236 cm_node->tcp_cntxt.mss)
1237 cm_node->tcp_cntxt.mss = tmp;
1240 case OPTION_NUMBER_WINDOW_SCALE:
1241 cm_node->tcp_cntxt.snd_wscale =
1242 all_options->as_windowscale.shiftcount;
1244 case OPTION_NUMBER_WRITE0:
1245 cm_node->send_write0 = 1;
1248 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1249 all_options->as_base.optionnum);
1252 offset += all_options->as_base.length;
1254 if ((!got_mss_option) && (syn_packet))
1255 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1259 static void drop_packet(struct sk_buff *skb)
1261 atomic_inc(&cm_accel_dropped_pkts);
1262 dev_kfree_skb_any(skb);
1265 static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1266 struct tcphdr *tcph)
1268 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1269 "refcnt=%d\n", cm_node, cm_node->state,
1270 atomic_read(&cm_node->ref_count));
1271 cm_node->tcp_cntxt.rcv_nxt++;
1272 cleanup_retrans_entry(cm_node);
1273 switch (cm_node->state) {
1274 case NES_CM_STATE_SYN_RCVD:
1275 case NES_CM_STATE_SYN_SENT:
1276 case NES_CM_STATE_ESTABLISHED:
1277 case NES_CM_STATE_MPAREQ_SENT:
1278 cm_node->state = NES_CM_STATE_LAST_ACK;
1279 send_fin(cm_node, skb);
1281 case NES_CM_STATE_FIN_WAIT1:
1282 cm_node->state = NES_CM_STATE_CLOSING;
1283 send_ack(cm_node, skb);
1285 case NES_CM_STATE_FIN_WAIT2:
1286 cm_node->state = NES_CM_STATE_TIME_WAIT;
1287 send_ack(cm_node, skb);
1288 cm_node->state = NES_CM_STATE_CLOSED;
1290 case NES_CM_STATE_TSA:
1292 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1293 cm_node, cm_node->state);
1300 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1301 struct tcphdr *tcph)
1304 int reset = 0; /* whether to send reset in case of err.. */
1306 atomic_inc(&cm_resets_recvd);
1307 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1308 " refcnt=%d\n", cm_node, cm_node->state,
1309 atomic_read(&cm_node->ref_count));
1310 cleanup_retrans_entry(cm_node);
1311 switch (cm_node->state) {
1312 case NES_CM_STATE_SYN_SENT:
1313 case NES_CM_STATE_MPAREQ_SENT:
1314 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1315 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1316 cm_node->listener, cm_node->state);
1317 active_open_err(cm_node, skb, reset);
1319 case NES_CM_STATE_MPAREQ_RCVD:
1320 passive_state = atomic_add_return(1, &cm_node->passive_state);
1321 if (passive_state == NES_SEND_RESET_EVENT)
1322 create_event(cm_node, NES_CM_EVENT_RESET);
1323 cleanup_retrans_entry(cm_node);
1324 cm_node->state = NES_CM_STATE_CLOSED;
1325 dev_kfree_skb_any(skb);
1327 case NES_CM_STATE_ESTABLISHED:
1328 case NES_CM_STATE_SYN_RCVD:
1329 case NES_CM_STATE_LISTENING:
1330 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1331 passive_open_err(cm_node, skb, reset);
1333 case NES_CM_STATE_TSA:
1334 active_open_err(cm_node, skb, reset);
1336 case NES_CM_STATE_CLOSED:
1337 cleanup_retrans_entry(cm_node);
1346 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb,
1347 enum nes_cm_event_type type)
1351 int datasize = skb->len;
1352 u8 *dataloc = skb->data;
1353 ret = parse_mpa(cm_node, dataloc, datasize);
1355 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1356 if (type == NES_CM_EVENT_CONNECTED) {
1357 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1358 "cm_node=%p listener=%p state=%d\n", __func__,
1359 __LINE__, cm_node, cm_node->listener,
1361 active_open_err(cm_node, skb, 1);
1363 passive_open_err(cm_node, skb, 1);
1366 cleanup_retrans_entry(cm_node);
1367 dev_kfree_skb_any(skb);
1368 if (type == NES_CM_EVENT_CONNECTED)
1369 cm_node->state = NES_CM_STATE_TSA;
1371 atomic_set(&cm_node->passive_state,
1372 NES_PASSIVE_STATE_INDICATED);
1373 create_event(cm_node, type);
1379 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1381 switch (cm_node->state) {
1382 case NES_CM_STATE_SYN_SENT:
1383 case NES_CM_STATE_MPAREQ_SENT:
1384 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1385 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1386 cm_node->listener, cm_node->state);
1387 active_open_err(cm_node, skb, 1);
1389 case NES_CM_STATE_ESTABLISHED:
1390 case NES_CM_STATE_SYN_RCVD:
1391 passive_open_err(cm_node, skb, 1);
1393 case NES_CM_STATE_TSA:
1399 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1400 struct sk_buff *skb)
1404 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1406 active_open_err(cm_node, skb, 1);
1411 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1412 struct sk_buff *skb)
1417 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1418 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1420 seq = ntohl(tcph->seq);
1421 ack_seq = ntohl(tcph->ack_seq);
1422 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1423 if (ack_seq != loc_seq_num)
1425 else if ((seq + rcv_wnd) < rcv_nxt)
1428 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1429 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1430 cm_node->listener, cm_node->state);
1431 indicate_pkt_err(cm_node, skb);
1432 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1433 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1440 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1441 * is created with a listener or it may comein as rexmitted packet which in
1442 * that case will be just dropped.
1445 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1446 struct tcphdr *tcph)
1452 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1454 inc_sequence = ntohl(tcph->seq);
1456 switch (cm_node->state) {
1457 case NES_CM_STATE_SYN_SENT:
1458 case NES_CM_STATE_MPAREQ_SENT:
1459 /* Rcvd syn on active open connection*/
1460 active_open_err(cm_node, skb, 1);
1462 case NES_CM_STATE_LISTENING:
1464 cm_node->accept_pend = 1;
1465 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1466 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1467 cm_node->listener->backlog) {
1468 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1471 passive_open_err(cm_node, skb, 0);
1474 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1477 passive_open_err(cm_node, skb, 0);
1481 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1482 BUG_ON(cm_node->send_entry);
1483 cm_node->state = NES_CM_STATE_SYN_RCVD;
1484 send_syn(cm_node, 1, skb);
1486 case NES_CM_STATE_CLOSED:
1487 cleanup_retrans_entry(cm_node);
1488 send_reset(cm_node, skb);
1490 case NES_CM_STATE_TSA:
1491 case NES_CM_STATE_ESTABLISHED:
1492 case NES_CM_STATE_FIN_WAIT1:
1493 case NES_CM_STATE_FIN_WAIT2:
1494 case NES_CM_STATE_MPAREQ_RCVD:
1495 case NES_CM_STATE_LAST_ACK:
1496 case NES_CM_STATE_CLOSING:
1497 case NES_CM_STATE_UNKNOWN:
1504 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1505 struct tcphdr *tcph)
1512 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1514 inc_sequence = ntohl(tcph->seq);
1515 switch (cm_node->state) {
1516 case NES_CM_STATE_SYN_SENT:
1518 if (check_syn(cm_node, tcph, skb))
1520 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1522 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1524 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1528 cleanup_retrans_entry(cm_node);
1529 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1530 send_mpa_request(cm_node, skb);
1531 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1533 case NES_CM_STATE_MPAREQ_RCVD:
1534 /* passive open, so should not be here */
1535 passive_open_err(cm_node, skb, 1);
1537 case NES_CM_STATE_LISTENING:
1538 case NES_CM_STATE_CLOSED:
1539 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1540 cleanup_retrans_entry(cm_node);
1541 send_reset(cm_node, skb);
1543 case NES_CM_STATE_ESTABLISHED:
1544 case NES_CM_STATE_FIN_WAIT1:
1545 case NES_CM_STATE_FIN_WAIT2:
1546 case NES_CM_STATE_LAST_ACK:
1547 case NES_CM_STATE_TSA:
1548 case NES_CM_STATE_CLOSING:
1549 case NES_CM_STATE_UNKNOWN:
1550 case NES_CM_STATE_MPAREQ_SENT:
1557 static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1558 struct tcphdr *tcph)
1566 u32 temp_seq = cm_node->tcp_cntxt.loc_seq_num;
1568 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1569 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1571 if (check_seq(cm_node, tcph, skb))
1574 skb_pull(skb, tcph->doff << 2);
1575 inc_sequence = ntohl(tcph->seq);
1576 rem_seq = ntohl(tcph->seq);
1577 rem_seq_ack = ntohl(tcph->ack_seq);
1578 datasize = skb->len;
1580 switch (cm_node->state) {
1581 case NES_CM_STATE_SYN_RCVD:
1583 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1586 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1587 cm_node->tcp_cntxt.loc_seq_num = temp_seq;
1588 if (cm_node->tcp_cntxt.rem_ack_num !=
1589 cm_node->tcp_cntxt.loc_seq_num) {
1590 nes_debug(NES_DBG_CM, "rem_ack_num != loc_seq_num\n");
1591 cleanup_retrans_entry(cm_node);
1592 send_reset(cm_node, skb);
1595 cm_node->state = NES_CM_STATE_ESTABLISHED;
1597 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1598 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1599 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ);
1600 } else { /* rcvd ACK only */
1601 dev_kfree_skb_any(skb);
1602 cleanup_retrans_entry(cm_node);
1605 case NES_CM_STATE_ESTABLISHED:
1607 /* We expect mpa frame to be received only */
1609 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1610 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1611 handle_rcv_mpa(cm_node, skb,
1612 NES_CM_EVENT_MPA_REQ);
1616 case NES_CM_STATE_MPAREQ_SENT:
1617 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1619 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1620 handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED);
1621 } else { /* Could be just an ack pkt.. */
1622 cleanup_retrans_entry(cm_node);
1623 dev_kfree_skb_any(skb);
1626 case NES_CM_STATE_LISTENING:
1627 case NES_CM_STATE_CLOSED:
1628 cleanup_retrans_entry(cm_node);
1629 send_reset(cm_node, skb);
1631 case NES_CM_STATE_FIN_WAIT1:
1632 case NES_CM_STATE_SYN_SENT:
1633 case NES_CM_STATE_FIN_WAIT2:
1634 case NES_CM_STATE_TSA:
1635 case NES_CM_STATE_MPAREQ_RCVD:
1636 case NES_CM_STATE_LAST_ACK:
1637 case NES_CM_STATE_CLOSING:
1638 case NES_CM_STATE_UNKNOWN:
1647 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1648 struct sk_buff *skb, int optionsize, int passive)
1650 u8 *optionsloc = (u8 *)&tcph[1];
1652 if (process_options(cm_node, optionsloc, optionsize,
1654 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1657 passive_open_err(cm_node, skb, 1);
1659 active_open_err(cm_node, skb, 1);
1664 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1665 cm_node->tcp_cntxt.snd_wscale;
1667 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1668 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1673 * active_open_err() will send reset() if flag set..
1674 * It will also send ABORT event.
1677 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1680 cleanup_retrans_entry(cm_node);
1682 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1683 "state=%d\n", cm_node, cm_node->state);
1684 add_ref_cm_node(cm_node);
1685 send_reset(cm_node, skb);
1687 dev_kfree_skb_any(skb);
1689 cm_node->state = NES_CM_STATE_CLOSED;
1690 create_event(cm_node, NES_CM_EVENT_ABORTED);
1694 * passive_open_err() will either do a reset() or will free up the skb and
1695 * remove the cm_node.
1698 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1701 cleanup_retrans_entry(cm_node);
1702 cm_node->state = NES_CM_STATE_CLOSED;
1704 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1705 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1706 send_reset(cm_node, skb);
1708 dev_kfree_skb_any(skb);
1709 rem_ref_cm_node(cm_node->cm_core, cm_node);
1714 * free_retrans_entry() routines assumes that the retrans_list_lock has
1715 * been acquired before calling.
1717 static void free_retrans_entry(struct nes_cm_node *cm_node)
1719 struct nes_timer_entry *send_entry;
1720 send_entry = cm_node->send_entry;
1722 cm_node->send_entry = NULL;
1723 dev_kfree_skb_any(send_entry->skb);
1725 rem_ref_cm_node(cm_node->cm_core, cm_node);
1729 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1731 unsigned long flags;
1733 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1734 free_retrans_entry(cm_node);
1735 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1740 * Returns skb if to be freed, else it will return NULL if already used..
1742 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1743 struct nes_cm_core *cm_core)
1745 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1746 struct tcphdr *tcph = tcp_hdr(skb);
1747 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1749 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1750 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1751 tcph->ack, tcph->rst, tcph->fin);
1754 pkt_type = NES_PKT_TYPE_RST;
1755 else if (tcph->syn) {
1756 pkt_type = NES_PKT_TYPE_SYN;
1758 pkt_type = NES_PKT_TYPE_SYNACK;
1759 } else if (tcph->fin)
1760 pkt_type = NES_PKT_TYPE_FIN;
1762 pkt_type = NES_PKT_TYPE_ACK;
1765 case NES_PKT_TYPE_SYN:
1766 handle_syn_pkt(cm_node, skb, tcph);
1768 case NES_PKT_TYPE_SYNACK:
1769 handle_synack_pkt(cm_node, skb, tcph);
1771 case NES_PKT_TYPE_ACK:
1772 handle_ack_pkt(cm_node, skb, tcph);
1774 case NES_PKT_TYPE_RST:
1775 handle_rst_pkt(cm_node, skb, tcph);
1777 case NES_PKT_TYPE_FIN:
1778 handle_fin_pkt(cm_node, skb, tcph);
1787 * mini_cm_listen - create a listen node with params
1789 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1790 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1792 struct nes_cm_listener *listener;
1793 unsigned long flags;
1795 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1796 cm_info->loc_addr, cm_info->loc_port);
1798 /* cannot have multiple matching listeners */
1799 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1800 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1801 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1802 /* find automatically incs ref count ??? */
1803 atomic_dec(&listener->ref_count);
1804 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1809 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1810 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1812 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1816 listener->loc_addr = htonl(cm_info->loc_addr);
1817 listener->loc_port = htons(cm_info->loc_port);
1818 listener->reused_node = 0;
1820 atomic_set(&listener->ref_count, 1);
1823 /* find already inc'ed the ref count */
1825 listener->reused_node = 1;
1828 listener->cm_id = cm_info->cm_id;
1829 atomic_set(&listener->pend_accepts_cnt, 0);
1830 listener->cm_core = cm_core;
1831 listener->nesvnic = nesvnic;
1832 atomic_inc(&cm_core->node_cnt);
1834 listener->conn_type = cm_info->conn_type;
1835 listener->backlog = cm_info->backlog;
1836 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1838 if (!listener->reused_node) {
1839 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1840 list_add(&listener->list, &cm_core->listen_list.list);
1841 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1842 atomic_inc(&cm_core->listen_node_cnt);
1845 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1846 " listener = %p, backlog = %d, cm_id = %p.\n",
1847 cm_info->loc_addr, cm_info->loc_port,
1848 listener, listener->backlog, listener->cm_id);
1855 * mini_cm_connect - make a connection node with params
1857 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1858 struct nes_vnic *nesvnic, u16 private_data_len,
1859 void *private_data, struct nes_cm_info *cm_info)
1862 struct nes_cm_node *cm_node;
1863 struct nes_cm_listener *loopbackremotelistener;
1864 struct nes_cm_node *loopbackremotenode;
1865 struct nes_cm_info loopback_cm_info;
1866 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
1867 struct ietf_mpa_frame *mpa_frame = NULL;
1869 /* create a CM connection node */
1870 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1873 mpa_frame = &cm_node->mpa_frame;
1874 strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ);
1875 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
1876 mpa_frame->rev = IETF_MPA_VERSION;
1877 mpa_frame->priv_data_len = htons(private_data_len);
1879 /* set our node side to client (active) side */
1880 cm_node->tcp_cntxt.client = 1;
1881 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1883 if (cm_info->loc_addr == cm_info->rem_addr) {
1884 loopbackremotelistener = find_listener(cm_core,
1885 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
1886 NES_CM_LISTENER_ACTIVE_STATE);
1887 if (loopbackremotelistener == NULL) {
1888 create_event(cm_node, NES_CM_EVENT_ABORTED);
1890 atomic_inc(&cm_loopbacks);
1891 loopback_cm_info = *cm_info;
1892 loopback_cm_info.loc_port = cm_info->rem_port;
1893 loopback_cm_info.rem_port = cm_info->loc_port;
1894 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
1895 loopbackremotenode = make_cm_node(cm_core, nesvnic,
1896 &loopback_cm_info, loopbackremotelistener);
1897 loopbackremotenode->loopbackpartner = cm_node;
1898 loopbackremotenode->tcp_cntxt.rcv_wscale =
1899 NES_CM_DEFAULT_RCV_WND_SCALE;
1900 cm_node->loopbackpartner = loopbackremotenode;
1901 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
1903 loopbackremotenode->mpa_frame_size = private_data_len;
1905 /* we are done handling this state. */
1906 /* set node to a TSA state */
1907 cm_node->state = NES_CM_STATE_TSA;
1908 cm_node->tcp_cntxt.rcv_nxt =
1909 loopbackremotenode->tcp_cntxt.loc_seq_num;
1910 loopbackremotenode->tcp_cntxt.rcv_nxt =
1911 cm_node->tcp_cntxt.loc_seq_num;
1912 cm_node->tcp_cntxt.max_snd_wnd =
1913 loopbackremotenode->tcp_cntxt.rcv_wnd;
1914 loopbackremotenode->tcp_cntxt.max_snd_wnd =
1915 cm_node->tcp_cntxt.rcv_wnd;
1916 cm_node->tcp_cntxt.snd_wnd =
1917 loopbackremotenode->tcp_cntxt.rcv_wnd;
1918 loopbackremotenode->tcp_cntxt.snd_wnd =
1919 cm_node->tcp_cntxt.rcv_wnd;
1920 cm_node->tcp_cntxt.snd_wscale =
1921 loopbackremotenode->tcp_cntxt.rcv_wscale;
1922 loopbackremotenode->tcp_cntxt.snd_wscale =
1923 cm_node->tcp_cntxt.rcv_wscale;
1925 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1930 /* set our node side to client (active) side */
1931 cm_node->tcp_cntxt.client = 1;
1932 /* init our MPA frame ptr */
1933 memcpy(mpa_frame->priv_data, private_data, private_data_len);
1935 cm_node->mpa_frame_size = mpa_frame_size;
1937 /* send a syn and goto syn sent state */
1938 cm_node->state = NES_CM_STATE_SYN_SENT;
1939 ret = send_syn(cm_node, 0, NULL);
1942 /* error in sending the syn free up the cm_node struct */
1943 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
1944 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
1945 cm_node->rem_addr, cm_node->rem_port, cm_node,
1947 rem_ref_cm_node(cm_node->cm_core, cm_node);
1952 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
1953 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
1954 cm_node->rem_addr, cm_node->rem_port, cm_node,
1962 * mini_cm_accept - accept a connection
1963 * This function is never called
1965 static int mini_cm_accept(struct nes_cm_core *cm_core,
1966 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
1973 * mini_cm_reject - reject and teardown a connection
1975 static int mini_cm_reject(struct nes_cm_core *cm_core,
1976 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
1981 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
1982 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
1984 if (cm_node->tcp_cntxt.client)
1986 cleanup_retrans_entry(cm_node);
1988 passive_state = atomic_add_return(1, &cm_node->passive_state);
1989 cm_node->state = NES_CM_STATE_CLOSED;
1990 if (passive_state == NES_SEND_RESET_EVENT)
1991 rem_ref_cm_node(cm_core, cm_node);
1993 ret = send_reset(cm_node, NULL);
2001 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2005 if (!cm_core || !cm_node)
2008 switch (cm_node->state) {
2009 case NES_CM_STATE_SYN_RCVD:
2010 case NES_CM_STATE_SYN_SENT:
2011 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2012 case NES_CM_STATE_ESTABLISHED:
2013 case NES_CM_STATE_ACCEPTING:
2014 case NES_CM_STATE_MPAREQ_SENT:
2015 case NES_CM_STATE_MPAREQ_RCVD:
2016 cleanup_retrans_entry(cm_node);
2017 send_reset(cm_node, NULL);
2019 case NES_CM_STATE_CLOSE_WAIT:
2020 cm_node->state = NES_CM_STATE_LAST_ACK;
2021 send_fin(cm_node, NULL);
2023 case NES_CM_STATE_FIN_WAIT1:
2024 case NES_CM_STATE_FIN_WAIT2:
2025 case NES_CM_STATE_LAST_ACK:
2026 case NES_CM_STATE_TIME_WAIT:
2027 case NES_CM_STATE_CLOSING:
2030 case NES_CM_STATE_LISTENING:
2031 case NES_CM_STATE_UNKNOWN:
2032 case NES_CM_STATE_INITED:
2033 case NES_CM_STATE_CLOSED:
2034 ret = rem_ref_cm_node(cm_core, cm_node);
2036 case NES_CM_STATE_TSA:
2037 if (cm_node->send_entry)
2038 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2039 "send_entry=%p\n", cm_node->send_entry);
2040 ret = rem_ref_cm_node(cm_core, cm_node);
2048 * recv_pkt - recv an ETHERNET packet, and process it through CM
2049 * node state machine
2051 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2052 struct nes_vnic *nesvnic, struct sk_buff *skb)
2054 struct nes_cm_node *cm_node = NULL;
2055 struct nes_cm_listener *listener = NULL;
2057 struct tcphdr *tcph;
2058 struct nes_cm_info nfo;
2059 int skb_handled = 1;
2060 __be32 tmp_daddr, tmp_saddr;
2064 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2068 iph = (struct iphdr *)skb->data;
2069 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2071 nfo.loc_addr = ntohl(iph->daddr);
2072 nfo.loc_port = ntohs(tcph->dest);
2073 nfo.rem_addr = ntohl(iph->saddr);
2074 nfo.rem_port = ntohs(tcph->source);
2076 tmp_daddr = cpu_to_be32(iph->daddr);
2077 tmp_saddr = cpu_to_be32(iph->saddr);
2079 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2080 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2083 cm_node = find_node(cm_core,
2084 nfo.rem_port, nfo.rem_addr,
2085 nfo.loc_port, nfo.loc_addr);
2088 /* Only type of packet accepted are for */
2089 /* the PASSIVE open (syn only) */
2090 if ((!tcph->syn) || (tcph->ack)) {
2094 listener = find_listener(cm_core, nfo.loc_addr,
2096 NES_CM_LISTENER_ACTIVE_STATE);
2100 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2104 nfo.cm_id = listener->cm_id;
2105 nfo.conn_type = listener->conn_type;
2106 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2109 nes_debug(NES_DBG_CM, "Unable to allocate "
2111 cm_packets_dropped++;
2112 atomic_dec(&listener->ref_count);
2113 dev_kfree_skb_any(skb);
2116 if (!tcph->rst && !tcph->fin) {
2117 cm_node->state = NES_CM_STATE_LISTENING;
2119 cm_packets_dropped++;
2120 rem_ref_cm_node(cm_core, cm_node);
2121 dev_kfree_skb_any(skb);
2124 add_ref_cm_node(cm_node);
2125 } else if (cm_node->state == NES_CM_STATE_TSA) {
2126 rem_ref_cm_node(cm_core, cm_node);
2127 atomic_inc(&cm_accel_dropped_pkts);
2128 dev_kfree_skb_any(skb);
2131 skb_reset_network_header(skb);
2132 skb_set_transport_header(skb, sizeof(*tcph));
2133 skb->len = ntohs(iph->tot_len);
2134 process_packet(cm_node, skb, cm_core);
2135 rem_ref_cm_node(cm_core, cm_node);
2142 * nes_cm_alloc_core - allocate a top level instance of a cm core
2144 static struct nes_cm_core *nes_cm_alloc_core(void)
2146 struct nes_cm_core *cm_core;
2148 /* setup the CM core */
2149 /* alloc top level core control structure */
2150 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2154 INIT_LIST_HEAD(&cm_core->connected_nodes);
2155 init_timer(&cm_core->tcp_timer);
2156 cm_core->tcp_timer.function = nes_cm_timer_tick;
2158 cm_core->mtu = NES_CM_DEFAULT_MTU;
2159 cm_core->state = NES_CM_STATE_INITED;
2160 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2162 atomic_set(&cm_core->events_posted, 0);
2164 cm_core->api = &nes_cm_api;
2166 spin_lock_init(&cm_core->ht_lock);
2167 spin_lock_init(&cm_core->listen_list_lock);
2169 INIT_LIST_HEAD(&cm_core->listen_list.list);
2171 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2173 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2174 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2175 cm_core->post_event = nes_cm_post_event;
2176 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2177 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2179 print_core(cm_core);
2185 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2187 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2189 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2196 if (timer_pending(&cm_core->tcp_timer)) {
2197 del_timer(&cm_core->tcp_timer);
2200 destroy_workqueue(cm_core->event_wq);
2201 destroy_workqueue(cm_core->disconn_wq);
2202 nes_debug(NES_DBG_CM, "\n");
2212 static int mini_cm_get(struct nes_cm_core *cm_core)
2214 return cm_core->state;
2221 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2226 case NES_CM_SET_PKT_SIZE:
2227 cm_core->mtu = value;
2229 case NES_CM_SET_FREE_PKT_Q_SIZE:
2230 cm_core->free_tx_pkt_max = value;
2233 /* unknown set option */
2242 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2243 * successfully exchanged when this is called
2245 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2252 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2253 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2254 NES_QPCONTEXT_MISC_DROS);
2256 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2257 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2259 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2261 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2263 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2264 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2266 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2267 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2268 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2270 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2271 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2272 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2274 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2275 nesqp->nesqp_context->ts_recent = 0;
2276 nesqp->nesqp_context->ts_age = 0;
2277 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2278 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2279 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2280 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2281 cm_node->tcp_cntxt.rcv_wscale);
2282 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2283 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2284 nesqp->nesqp_context->srtt = 0;
2285 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2286 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2287 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2288 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2289 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2290 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2292 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2293 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2294 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2295 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2296 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2297 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2298 le32_to_cpu(nesqp->nesqp_context->misc));
2299 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2300 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2301 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2303 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2304 cm_node->state = NES_CM_STATE_TSA;
2313 int nes_cm_disconn(struct nes_qp *nesqp)
2315 unsigned long flags;
2317 spin_lock_irqsave(&nesqp->lock, flags);
2318 if (nesqp->disconn_pending == 0) {
2319 nesqp->disconn_pending++;
2320 spin_unlock_irqrestore(&nesqp->lock, flags);
2321 /* init our disconnect work element, to */
2322 INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
2324 queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
2326 spin_unlock_irqrestore(&nesqp->lock, flags);
2333 * nes_disconnect_worker
2335 static void nes_disconnect_worker(struct work_struct *work)
2337 struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
2339 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2340 nesqp->last_aeq, nesqp->hwqp.qp_id);
2341 nes_cm_disconn_true(nesqp);
2346 * nes_cm_disconn_true
2348 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2350 unsigned long flags;
2352 struct iw_cm_id *cm_id;
2353 struct iw_cm_event cm_event;
2354 struct nes_vnic *nesvnic;
2356 u8 original_hw_tcp_state;
2357 u8 original_ibqp_state;
2358 u8 issued_disconnect_reset = 0;
2361 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2365 spin_lock_irqsave(&nesqp->lock, flags);
2366 cm_id = nesqp->cm_id;
2367 /* make sure we havent already closed this connection */
2369 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2371 spin_unlock_irqrestore(&nesqp->lock, flags);
2375 nesvnic = to_nesvnic(nesqp->ibqp.device);
2376 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2378 original_hw_tcp_state = nesqp->hw_tcp_state;
2379 original_ibqp_state = nesqp->ibqp_state;
2380 last_ae = nesqp->last_aeq;
2383 nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
2385 if ((nesqp->cm_id) && (cm_id->event_handler)) {
2386 if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2387 ((original_ibqp_state == IB_QPS_RTS) &&
2388 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2389 atomic_inc(&cm_disconnects);
2390 cm_event.event = IW_CM_EVENT_DISCONNECT;
2391 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
2392 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2393 nes_debug(NES_DBG_CM, "Generating a CM "
2394 "Disconnect Event (status reset) for "
2395 "QP%u, cm_id = %p. \n",
2396 nesqp->hwqp.qp_id, cm_id);
2398 cm_event.status = IW_CM_EVENT_STATUS_OK;
2400 cm_event.local_addr = cm_id->local_addr;
2401 cm_event.remote_addr = cm_id->remote_addr;
2402 cm_event.private_data = NULL;
2403 cm_event.private_data_len = 0;
2405 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2406 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2407 "cm_id = %p, refcount = %u.\n",
2408 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2409 nesqp->hwqp.sq_tail, cm_id,
2410 atomic_read(&nesqp->refcount));
2412 spin_unlock_irqrestore(&nesqp->lock, flags);
2413 ret = cm_id->event_handler(cm_id, &cm_event);
2415 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2416 "returned, ret=%d\n", ret);
2417 spin_lock_irqsave(&nesqp->lock, flags);
2420 nesqp->disconn_pending = 0;
2421 /* There might have been another AE while the lock was released */
2422 original_hw_tcp_state = nesqp->hw_tcp_state;
2423 original_ibqp_state = nesqp->ibqp_state;
2424 last_ae = nesqp->last_aeq;
2426 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2427 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2428 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2429 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2430 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2431 atomic_inc(&cm_closes);
2432 nesqp->cm_id = NULL;
2433 nesqp->in_disconnect = 0;
2434 spin_unlock_irqrestore(&nesqp->lock, flags);
2435 nes_disconnect(nesqp, 1);
2437 cm_id->provider_data = nesqp;
2438 /* Send up the close complete event */
2439 cm_event.event = IW_CM_EVENT_CLOSE;
2440 cm_event.status = IW_CM_EVENT_STATUS_OK;
2441 cm_event.provider_data = cm_id->provider_data;
2442 cm_event.local_addr = cm_id->local_addr;
2443 cm_event.remote_addr = cm_id->remote_addr;
2444 cm_event.private_data = NULL;
2445 cm_event.private_data_len = 0;
2447 ret = cm_id->event_handler(cm_id, &cm_event);
2449 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2452 cm_id->rem_ref(cm_id);
2454 spin_lock_irqsave(&nesqp->lock, flags);
2455 if (nesqp->flush_issued == 0) {
2456 nesqp->flush_issued = 1;
2457 spin_unlock_irqrestore(&nesqp->lock, flags);
2458 flush_wqes(nesvnic->nesdev, nesqp,
2459 NES_CQP_FLUSH_RQ, 1);
2461 spin_unlock_irqrestore(&nesqp->lock, flags);
2463 cm_id = nesqp->cm_id;
2464 spin_unlock_irqrestore(&nesqp->lock, flags);
2465 /* check to see if the inbound reset beat the outbound reset */
2466 if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
2467 nes_debug(NES_DBG_CM, "QP%u: Decing refcount "
2468 "due to inbound reset beating the "
2469 "outbound reset.\n", nesqp->hwqp.qp_id);
2473 nesqp->disconn_pending = 0;
2474 spin_unlock_irqrestore(&nesqp->lock, flags);
2484 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2487 struct nes_vnic *nesvnic;
2488 struct nes_device *nesdev;
2490 nesvnic = to_nesvnic(nesqp->ibqp.device);
2494 nesdev = nesvnic->nesdev;
2496 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2497 atomic_read(&nesvnic->netdev->refcnt));
2499 if (nesqp->active_conn) {
2501 /* indicate this connection is NOT active */
2502 nesqp->active_conn = 0;
2504 /* Need to free the Last Streaming Mode Message */
2505 if (nesqp->ietf_frame) {
2506 pci_free_consistent(nesdev->pcidev,
2507 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2508 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2512 /* close the CM node down if it is still active */
2513 if (nesqp->cm_node) {
2514 nes_debug(NES_DBG_CM, "Call close API\n");
2516 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2526 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2530 struct nes_qp *nesqp;
2531 struct nes_vnic *nesvnic;
2532 struct nes_device *nesdev;
2533 struct nes_cm_node *cm_node;
2534 struct nes_adapter *adapter;
2535 struct ib_qp_attr attr;
2536 struct iw_cm_event cm_event;
2537 struct nes_hw_qp_wqe *wqe;
2538 struct nes_v4_quad nes_quad;
2543 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2547 /* get all our handles */
2548 nesqp = to_nesqp(ibqp);
2549 nesvnic = to_nesvnic(nesqp->ibqp.device);
2550 nesdev = nesvnic->nesdev;
2551 adapter = nesdev->nesadapter;
2553 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2554 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2555 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2556 nesvnic->netdev->name);
2558 /* associate the node with the QP */
2559 nesqp->cm_node = (void *)cm_node;
2560 cm_node->nesqp = nesqp;
2561 nes_add_ref(&nesqp->ibqp);
2563 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2564 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2565 atomic_inc(&cm_accepts);
2567 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2568 atomic_read(&nesvnic->netdev->refcnt));
2570 /* allocate the ietf frame and space for private data */
2571 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2572 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2573 &nesqp->ietf_frame_pbase);
2575 if (!nesqp->ietf_frame) {
2576 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2582 /* setup the MPA frame */
2583 nesqp->private_data_len = conn_param->private_data_len;
2584 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2586 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2587 conn_param->private_data_len);
2589 nesqp->ietf_frame->priv_data_len =
2590 cpu_to_be16(conn_param->private_data_len);
2591 nesqp->ietf_frame->rev = mpa_version;
2592 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2594 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2595 wqe = &nesqp->hwqp.sq_vbase[0];
2597 if (cm_id->remote_addr.sin_addr.s_addr !=
2598 cm_id->local_addr.sin_addr.s_addr) {
2599 u64temp = (unsigned long)nesqp;
2600 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2601 set_wqe_64bit_value(wqe->wqe_words,
2602 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2604 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2605 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2606 NES_IWARP_SQ_WQE_WRPDU);
2607 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2608 cpu_to_le32(conn_param->private_data_len +
2609 sizeof(struct ietf_mpa_frame));
2610 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
2611 cpu_to_le32((u32)nesqp->ietf_frame_pbase);
2612 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
2613 cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
2614 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2615 cpu_to_le32(conn_param->private_data_len +
2616 sizeof(struct ietf_mpa_frame));
2617 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2619 nesqp->nesqp_context->ird_ord_sizes |=
2620 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2621 NES_QPCONTEXT_ORDIRD_WRPDU);
2623 nesqp->nesqp_context->ird_ord_sizes |=
2624 cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2625 NES_QPCONTEXT_ORDIRD_WRPDU |
2626 NES_QPCONTEXT_ORDIRD_ALSMM));
2628 nesqp->skip_lsmm = 1;
2631 /* Cache the cm_id in the qp */
2632 nesqp->cm_id = cm_id;
2633 cm_node->cm_id = cm_id;
2635 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2636 cm_id->provider_data = nesqp;
2637 nesqp->active_conn = 0;
2639 if (cm_node->state == NES_CM_STATE_TSA)
2640 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2643 nes_cm_init_tsa_conn(nesqp, cm_node);
2645 nesqp->nesqp_context->tcpPorts[0] =
2646 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2647 nesqp->nesqp_context->tcpPorts[1] =
2648 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2650 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2651 nesqp->nesqp_context->ip0 =
2652 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2654 nesqp->nesqp_context->ip0 =
2655 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2657 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2658 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2659 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2661 nesqp->nesqp_context->arp_index_vlan |=
2662 cpu_to_le32(nes_arp_table(nesdev,
2663 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2664 NES_ARP_RESOLVE) << 16);
2666 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2667 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2669 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2671 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2672 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2673 nesqp->nesqp_context->ird_ord_sizes |=
2674 cpu_to_le32((u32)conn_param->ord);
2676 memset(&nes_quad, 0, sizeof(nes_quad));
2677 nes_quad.DstIpAdrIndex =
2678 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2679 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2680 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2682 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2683 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2684 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2686 /* Produce hash key */
2687 crc_value = get_crc_value(&nes_quad);
2688 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2689 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2690 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2692 nesqp->hte_index &= adapter->hte_index_mask;
2693 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2695 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2697 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2698 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2699 "private data length=%zu.\n", nesqp->hwqp.qp_id,
2700 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2701 ntohs(cm_id->remote_addr.sin_port),
2702 ntohl(cm_id->local_addr.sin_addr.s_addr),
2703 ntohs(cm_id->local_addr.sin_port),
2704 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2705 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2706 conn_param->private_data_len +
2707 sizeof(struct ietf_mpa_frame));
2710 /* notify OF layer that accept event was successful */
2711 cm_id->add_ref(cm_id);
2713 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2714 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2715 cm_event.provider_data = (void *)nesqp;
2716 cm_event.local_addr = cm_id->local_addr;
2717 cm_event.remote_addr = cm_id->remote_addr;
2718 cm_event.private_data = NULL;
2719 cm_event.private_data_len = 0;
2720 ret = cm_id->event_handler(cm_id, &cm_event);
2721 attr.qp_state = IB_QPS_RTS;
2722 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2723 if (cm_node->loopbackpartner) {
2724 cm_node->loopbackpartner->mpa_frame_size =
2725 nesqp->private_data_len;
2726 /* copy entire MPA frame to our cm_node's frame */
2727 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2728 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2729 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2732 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2733 "ret=%d\n", __func__, __LINE__, ret);
2735 passive_state = atomic_add_return(1, &cm_node->passive_state);
2736 if (passive_state == NES_SEND_RESET_EVENT)
2737 create_event(cm_node, NES_CM_EVENT_RESET);
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)
2942 cm_packets_received++;
2943 if ((g_cm_core) && (g_cm_core->api)) {
2944 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
2946 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
2947 " cm is not setup properly.\n");
2956 * Start and init a cm core module
2958 int nes_cm_start(void)
2960 nes_debug(NES_DBG_CM, "\n");
2961 /* create the primary CM core, pass this handle to subsequent core inits */
2962 g_cm_core = nes_cm_alloc_core();
2973 * stop and dealloc all cm core instances
2975 int nes_cm_stop(void)
2977 g_cm_core->api->destroy_cm_core(g_cm_core);
2983 * cm_event_connected
2984 * handle a connected event, setup QPs and HW
2986 static void cm_event_connected(struct nes_cm_event *event)
2989 struct nes_qp *nesqp;
2990 struct nes_vnic *nesvnic;
2991 struct nes_device *nesdev;
2992 struct nes_cm_node *cm_node;
2993 struct nes_adapter *nesadapter;
2994 struct ib_qp_attr attr;
2995 struct iw_cm_id *cm_id;
2996 struct iw_cm_event cm_event;
2997 struct nes_hw_qp_wqe *wqe;
2998 struct nes_v4_quad nes_quad;
3002 /* get all our handles */
3003 cm_node = event->cm_node;
3004 cm_id = cm_node->cm_id;
3005 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3006 nesqp = (struct nes_qp *)cm_id->provider_data;
3007 nesvnic = to_nesvnic(nesqp->ibqp.device);
3008 nesdev = nesvnic->nesdev;
3009 nesadapter = nesdev->nesadapter;
3011 if (nesqp->destroyed) {
3014 atomic_inc(&cm_connecteds);
3015 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3016 " local port 0x%04X. jiffies = %lu.\n",
3018 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3019 ntohs(cm_id->remote_addr.sin_port),
3020 ntohs(cm_id->local_addr.sin_port),
3023 nes_cm_init_tsa_conn(nesqp, cm_node);
3025 /* set the QP tsa context */
3026 nesqp->nesqp_context->tcpPorts[0] =
3027 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3028 nesqp->nesqp_context->tcpPorts[1] =
3029 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3030 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3031 nesqp->nesqp_context->ip0 =
3032 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3034 nesqp->nesqp_context->ip0 =
3035 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3037 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3038 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3039 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3040 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3041 nes_arp_table(nesdev,
3042 le32_to_cpu(nesqp->nesqp_context->ip0),
3043 NULL, NES_ARP_RESOLVE) << 16);
3044 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3045 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3046 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3047 nesqp->nesqp_context->ird_ord_sizes |=
3048 cpu_to_le32((u32)1 <<
3049 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3051 /* Adjust tail for not having a LSMM */
3052 nesqp->hwqp.sq_tail = 1;
3054 #if defined(NES_SEND_FIRST_WRITE)
3055 if (cm_node->send_write0) {
3056 nes_debug(NES_DBG_CM, "Sending first write.\n");
3057 wqe = &nesqp->hwqp.sq_vbase[0];
3058 u64temp = (unsigned long)nesqp;
3059 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3060 set_wqe_64bit_value(wqe->wqe_words,
3061 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3062 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3063 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3064 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3065 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3066 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3067 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3068 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3070 /* use the reserved spot on the WQ for the extra first WQE */
3071 nesqp->nesqp_context->ird_ord_sizes &=
3072 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3073 NES_QPCONTEXT_ORDIRD_WRPDU |
3074 NES_QPCONTEXT_ORDIRD_ALSMM));
3075 nesqp->skip_lsmm = 1;
3076 nesqp->hwqp.sq_tail = 0;
3077 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3078 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3082 memset(&nes_quad, 0, sizeof(nes_quad));
3084 nes_quad.DstIpAdrIndex =
3085 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3086 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3087 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3089 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3090 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3091 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3093 /* Produce hash key */
3094 crc_value = get_crc_value(&nes_quad);
3095 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3096 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3097 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3099 nesqp->hte_index &= nesadapter->hte_index_mask;
3100 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3102 nesqp->ietf_frame = &cm_node->mpa_frame;
3103 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3104 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3106 /* notify OF layer we successfully created the requested connection */
3107 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3108 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3109 cm_event.provider_data = cm_id->provider_data;
3110 cm_event.local_addr.sin_family = AF_INET;
3111 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3112 cm_event.remote_addr = cm_id->remote_addr;
3114 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3115 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3117 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3118 ret = cm_id->event_handler(cm_id, &cm_event);
3119 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3122 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3123 "ret=%d\n", __func__, __LINE__, ret);
3124 attr.qp_state = IB_QPS_RTS;
3125 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3127 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3128 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3135 * cm_event_connect_error
3137 static void cm_event_connect_error(struct nes_cm_event *event)
3139 struct nes_qp *nesqp;
3140 struct iw_cm_id *cm_id;
3141 struct iw_cm_event cm_event;
3142 /* struct nes_cm_info cm_info; */
3145 if (!event->cm_node)
3148 cm_id = event->cm_node->cm_id;
3153 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3154 nesqp = cm_id->provider_data;
3160 /* notify OF layer about this connection error event */
3161 /* cm_id->rem_ref(cm_id); */
3162 nesqp->cm_id = NULL;
3163 cm_id->provider_data = NULL;
3164 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3165 cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
3166 cm_event.provider_data = cm_id->provider_data;
3167 cm_event.local_addr = cm_id->local_addr;
3168 cm_event.remote_addr = cm_id->remote_addr;
3169 cm_event.private_data = NULL;
3170 cm_event.private_data_len = 0;
3172 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3173 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3174 cm_event.remote_addr.sin_addr.s_addr);
3176 ret = cm_id->event_handler(cm_id, &cm_event);
3177 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3179 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3180 "ret=%d\n", __func__, __LINE__, ret);
3181 cm_id->rem_ref(cm_id);
3183 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3191 static void cm_event_reset(struct nes_cm_event *event)
3193 struct nes_qp *nesqp;
3194 struct iw_cm_id *cm_id;
3195 struct iw_cm_event cm_event;
3196 /* struct nes_cm_info cm_info; */
3199 if (!event->cm_node)
3202 if (!event->cm_node->cm_id)
3205 cm_id = event->cm_node->cm_id;
3207 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3208 nesqp = cm_id->provider_data;
3210 nesqp->cm_id = NULL;
3211 /* cm_id->provider_data = NULL; */
3212 cm_event.event = IW_CM_EVENT_DISCONNECT;
3213 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3214 cm_event.provider_data = cm_id->provider_data;
3215 cm_event.local_addr = cm_id->local_addr;
3216 cm_event.remote_addr = cm_id->remote_addr;
3217 cm_event.private_data = NULL;
3218 cm_event.private_data_len = 0;
3220 ret = cm_id->event_handler(cm_id, &cm_event);
3221 cm_id->add_ref(cm_id);
3222 atomic_inc(&cm_closes);
3223 cm_event.event = IW_CM_EVENT_CLOSE;
3224 cm_event.status = IW_CM_EVENT_STATUS_OK;
3225 cm_event.provider_data = cm_id->provider_data;
3226 cm_event.local_addr = cm_id->local_addr;
3227 cm_event.remote_addr = cm_id->remote_addr;
3228 cm_event.private_data = NULL;
3229 cm_event.private_data_len = 0;
3230 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3231 ret = cm_id->event_handler(cm_id, &cm_event);
3233 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3236 /* notify OF layer about this connection error event */
3237 cm_id->rem_ref(cm_id);
3246 static void cm_event_mpa_req(struct nes_cm_event *event)
3248 struct iw_cm_id *cm_id;
3249 struct iw_cm_event cm_event;
3251 struct nes_cm_node *cm_node;
3253 cm_node = event->cm_node;
3256 cm_id = cm_node->cm_id;
3258 atomic_inc(&cm_connect_reqs);
3259 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3260 cm_node, cm_id, jiffies);
3262 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3263 cm_event.status = IW_CM_EVENT_STATUS_OK;
3264 cm_event.provider_data = (void *)cm_node;
3266 cm_event.local_addr.sin_family = AF_INET;
3267 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3268 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3270 cm_event.remote_addr.sin_family = AF_INET;
3271 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3272 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3274 cm_event.private_data = cm_node->mpa_frame_buf;
3275 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3277 ret = cm_id->event_handler(cm_id, &cm_event);
3279 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
3280 __func__, __LINE__, ret);
3286 static void nes_cm_event_handler(struct work_struct *);
3290 * post an event to the cm event handler
3292 static int nes_cm_post_event(struct nes_cm_event *event)
3294 atomic_inc(&event->cm_node->cm_core->events_posted);
3295 add_ref_cm_node(event->cm_node);
3296 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3297 INIT_WORK(&event->event_work, nes_cm_event_handler);
3298 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3299 event->cm_node, event);
3301 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3303 nes_debug(NES_DBG_CM, "Exit\n");
3309 * nes_cm_event_handler
3310 * worker function to handle cm events
3311 * will free instance of nes_cm_event
3313 static void nes_cm_event_handler(struct work_struct *work)
3315 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3317 struct nes_cm_core *cm_core;
3319 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3322 cm_core = event->cm_node->cm_core;
3323 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3324 event, event->type, atomic_read(&cm_core->events_posted));
3326 switch (event->type) {
3327 case NES_CM_EVENT_MPA_REQ:
3328 cm_event_mpa_req(event);
3329 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3332 case NES_CM_EVENT_RESET:
3333 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3335 cm_event_reset(event);
3337 case NES_CM_EVENT_CONNECTED:
3338 if ((!event->cm_node->cm_id) ||
3339 (event->cm_node->state != NES_CM_STATE_TSA))
3341 cm_event_connected(event);
3342 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3344 case NES_CM_EVENT_ABORTED:
3345 if ((!event->cm_node->cm_id) ||
3346 (event->cm_node->state == NES_CM_STATE_TSA))
3348 cm_event_connect_error(event);
3349 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3351 case NES_CM_EVENT_DROPPED_PKT:
3352 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3355 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3359 atomic_dec(&cm_core->events_posted);
3360 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3361 rem_ref_cm_node(cm_core, event->cm_node);