2 * Copyright (c) 2006 - 2009 Intel Corporation. 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>
55 #include <linux/highmem.h>
56 #include <linux/slab.h>
58 #include <net/neighbour.h>
59 #include <net/route.h>
60 #include <net/ip_fib.h>
66 u32 cm_packets_bounced;
67 u32 cm_packets_dropped;
68 u32 cm_packets_retrans;
69 u32 cm_packets_created;
70 u32 cm_packets_received;
71 atomic_t cm_listens_created;
72 atomic_t cm_listens_destroyed;
74 atomic_t cm_loopbacks;
75 atomic_t cm_nodes_created;
76 atomic_t cm_nodes_destroyed;
77 atomic_t cm_accel_dropped_pkts;
78 atomic_t cm_resets_recvd;
80 static inline int mini_cm_accelerated(struct nes_cm_core *,
81 struct nes_cm_node *);
82 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
83 struct nes_vnic *, struct nes_cm_info *);
84 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
85 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
86 struct nes_vnic *, u16, void *, struct nes_cm_info *);
87 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
88 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
89 struct nes_cm_node *);
90 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
91 struct nes_cm_node *);
92 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
94 static int mini_cm_dealloc_core(struct nes_cm_core *);
95 static int mini_cm_get(struct nes_cm_core *);
96 static int mini_cm_set(struct nes_cm_core *, u32, u32);
98 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
99 void *, u32, void *, u32, u8);
100 static int add_ref_cm_node(struct nes_cm_node *);
101 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
103 static int nes_cm_disconn_true(struct nes_qp *);
104 static int nes_cm_post_event(struct nes_cm_event *event);
105 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
106 static void nes_disconnect_worker(struct work_struct *work);
108 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
109 static int send_mpa_reject(struct nes_cm_node *);
110 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
111 static int send_reset(struct nes_cm_node *, struct sk_buff *);
112 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
113 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
114 static void process_packet(struct nes_cm_node *, struct sk_buff *,
115 struct nes_cm_core *);
117 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
118 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
119 static void cleanup_retrans_entry(struct nes_cm_node *);
120 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
121 static void free_retrans_entry(struct nes_cm_node *cm_node);
122 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
123 struct sk_buff *skb, int optionsize, int passive);
125 /* CM event handler functions */
126 static void cm_event_connected(struct nes_cm_event *);
127 static void cm_event_connect_error(struct nes_cm_event *);
128 static void cm_event_reset(struct nes_cm_event *);
129 static void cm_event_mpa_req(struct nes_cm_event *);
130 static void cm_event_mpa_reject(struct nes_cm_event *);
131 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
133 static void print_core(struct nes_cm_core *core);
135 /* External CM API Interface */
136 /* instance of function pointers for client API */
137 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
138 static struct nes_cm_ops nes_cm_api = {
147 mini_cm_dealloc_core,
152 static struct nes_cm_core *g_cm_core;
154 atomic_t cm_connects;
156 atomic_t cm_disconnects;
158 atomic_t cm_connecteds;
159 atomic_t cm_connect_reqs;
166 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
167 enum nes_cm_event_type type)
169 struct nes_cm_event *event;
174 /* allocate an empty event */
175 event = kzalloc(sizeof(*event), GFP_ATOMIC);
181 event->cm_node = cm_node;
182 event->cm_info.rem_addr = cm_node->rem_addr;
183 event->cm_info.loc_addr = cm_node->loc_addr;
184 event->cm_info.rem_port = cm_node->rem_port;
185 event->cm_info.loc_port = cm_node->loc_port;
186 event->cm_info.cm_id = cm_node->cm_id;
188 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
189 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
190 cm_node, event, type, event->cm_info.loc_addr,
191 event->cm_info.loc_port, event->cm_info.rem_addr,
192 event->cm_info.rem_port);
194 nes_cm_post_event(event);
202 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
205 nes_debug(NES_DBG_CM, "skb set to NULL\n");
209 /* send an MPA Request frame */
210 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
211 cm_node->mpa_frame_size, SET_ACK);
213 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
218 static int send_mpa_reject(struct nes_cm_node *cm_node)
220 struct sk_buff *skb = NULL;
222 skb = dev_alloc_skb(MAX_CM_BUFFER);
224 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
228 /* send an MPA reject frame */
229 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
230 cm_node->mpa_frame_size, SET_ACK | SET_FIN);
232 cm_node->state = NES_CM_STATE_FIN_WAIT1;
233 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
238 * recv_mpa - process a received TCP pkt, we are expecting an
241 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
244 struct ietf_mpa_frame *mpa_frame;
246 *type = NES_MPA_REQUEST_ACCEPT;
248 /* assume req frame is in tcp data payload */
249 if (len < sizeof(struct ietf_mpa_frame)) {
250 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
254 mpa_frame = (struct ietf_mpa_frame *)buffer;
255 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
256 /* make sure mpa private data len is less than 512 bytes */
257 if (cm_node->mpa_frame_size > IETF_MAX_PRIV_DATA_LEN) {
258 nes_debug(NES_DBG_CM, "The received Length of Private"
259 " Data field exceeds 512 octets\n");
263 * make sure MPA receiver interoperate with the
264 * received MPA version and MPA key information
267 if (mpa_frame->rev != mpa_version) {
268 nes_debug(NES_DBG_CM, "The received mpa version"
269 " can not be interoperated\n");
272 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
273 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
274 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
278 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
279 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
284 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
285 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
286 " complete (%x + %x != %x)\n",
287 cm_node->mpa_frame_size,
288 (u32)sizeof(struct ietf_mpa_frame), len);
291 /* make sure it does not exceed the max size */
292 if (len > MAX_CM_BUFFER) {
293 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
294 " (%x + %x != %x)\n",
295 cm_node->mpa_frame_size,
296 (u32)sizeof(struct ietf_mpa_frame), len);
300 /* copy entire MPA frame to our cm_node's frame */
301 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
302 cm_node->mpa_frame_size);
304 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
305 *type = NES_MPA_REQUEST_REJECT;
311 * form_cm_frame - get a free packet and build empty frame Use
312 * node info to build.
314 static void form_cm_frame(struct sk_buff *skb,
315 struct nes_cm_node *cm_node, void *options, u32 optionsize,
316 void *data, u32 datasize, u8 flags)
322 u16 packetsize = sizeof(*iph);
324 packetsize += sizeof(*tcph);
325 packetsize += optionsize + datasize;
327 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
330 buf = skb_put(skb, packetsize + ETH_HLEN);
332 ethh = (struct ethhdr *) buf;
335 iph = (struct iphdr *)buf;
337 tcph = (struct tcphdr *)buf;
338 skb_reset_mac_header(skb);
339 skb_set_network_header(skb, ETH_HLEN);
340 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
341 buf += sizeof(*tcph);
343 skb->ip_summed = CHECKSUM_PARTIAL;
344 skb->protocol = htons(0x800);
346 skb->mac_len = ETH_HLEN;
348 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
349 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
350 ethh->h_proto = htons(0x0800);
352 iph->version = IPVERSION;
353 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
355 iph->tot_len = htons(packetsize);
356 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
358 iph->frag_off = htons(0x4000);
360 iph->protocol = 0x06; /* IPPROTO_TCP */
362 iph->saddr = htonl(cm_node->loc_addr);
363 iph->daddr = htonl(cm_node->rem_addr);
365 tcph->source = htons(cm_node->loc_port);
366 tcph->dest = htons(cm_node->rem_port);
367 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
369 if (flags & SET_ACK) {
370 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
371 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
376 if (flags & SET_SYN) {
377 cm_node->tcp_cntxt.loc_seq_num++;
380 cm_node->tcp_cntxt.loc_seq_num += datasize;
382 if (flags & SET_FIN) {
383 cm_node->tcp_cntxt.loc_seq_num++;
390 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
391 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
394 memcpy(buf, options, optionsize);
397 memcpy(buf, data, datasize);
399 skb_shinfo(skb)->nr_frags = 0;
400 cm_packets_created++;
406 * print_core - dump a cm core
408 static void print_core(struct nes_cm_core *core)
410 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
411 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
414 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
416 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
418 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
419 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
421 nes_debug(NES_DBG_CM, "core : %p \n", core);
423 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
429 * note - cm_node needs to be protected before calling this. Encase in:
430 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
432 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
433 enum nes_timer_type type, int send_retrans,
434 int close_when_complete)
437 struct nes_cm_core *cm_core = cm_node->cm_core;
438 struct nes_timer_entry *new_send;
442 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
446 /* new_send->timetosend = currenttime */
447 new_send->retrycount = NES_DEFAULT_RETRYS;
448 new_send->retranscount = NES_DEFAULT_RETRANS;
450 new_send->timetosend = jiffies;
451 new_send->type = type;
452 new_send->netdev = cm_node->netdev;
453 new_send->send_retrans = send_retrans;
454 new_send->close_when_complete = close_when_complete;
456 if (type == NES_TIMER_TYPE_CLOSE) {
457 new_send->timetosend += (HZ/10);
458 if (cm_node->recv_entry) {
463 cm_node->recv_entry = new_send;
466 if (type == NES_TIMER_TYPE_SEND) {
467 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
468 atomic_inc(&new_send->skb->users);
469 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
470 cm_node->send_entry = new_send;
471 add_ref_cm_node(cm_node);
472 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
473 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
475 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
476 if (ret != NETDEV_TX_OK) {
477 nes_debug(NES_DBG_CM, "Error sending packet %p "
478 "(jiffies = %lu)\n", new_send, jiffies);
479 new_send->timetosend = jiffies;
484 cleanup_retrans_entry(cm_node);
485 if (close_when_complete)
486 rem_ref_cm_node(cm_core, cm_node);
492 was_timer_set = timer_pending(&cm_core->tcp_timer);
494 if (!was_timer_set) {
495 cm_core->tcp_timer.expires = new_send->timetosend;
496 add_timer(&cm_core->tcp_timer);
502 static void nes_retrans_expired(struct nes_cm_node *cm_node)
504 struct iw_cm_id *cm_id = cm_node->cm_id;
505 enum nes_cm_node_state state = cm_node->state;
506 cm_node->state = NES_CM_STATE_CLOSED;
508 case NES_CM_STATE_SYN_RCVD:
509 case NES_CM_STATE_CLOSING:
510 rem_ref_cm_node(cm_node->cm_core, cm_node);
512 case NES_CM_STATE_LAST_ACK:
513 case NES_CM_STATE_FIN_WAIT1:
515 cm_id->rem_ref(cm_id);
516 send_reset(cm_node, NULL);
519 add_ref_cm_node(cm_node);
520 send_reset(cm_node, NULL);
521 create_event(cm_node, NES_CM_EVENT_ABORTED);
525 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
527 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
528 struct iw_cm_id *cm_id = cm_node->cm_id;
529 struct nes_qp *nesqp;
530 unsigned long qplockflags;
534 nesqp = (struct nes_qp *)recv_entry->skb;
536 spin_lock_irqsave(&nesqp->lock, qplockflags);
538 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
539 "refcount = %d: HIT A "
540 "NES_TIMER_TYPE_CLOSE with something "
541 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
542 atomic_read(&nesqp->refcount));
543 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
544 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
545 nesqp->ibqp_state = IB_QPS_ERR;
546 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
547 nes_cm_disconn(nesqp);
549 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
550 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
551 "refcount = %d: HIT A "
552 "NES_TIMER_TYPE_CLOSE with nothing "
553 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
554 atomic_read(&nesqp->refcount));
556 } else if (rem_node) {
557 /* TIME_WAIT state */
558 rem_ref_cm_node(cm_node->cm_core, cm_node);
561 cm_id->rem_ref(cm_id);
563 cm_node->recv_entry = NULL;
569 static void nes_cm_timer_tick(unsigned long pass)
572 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
573 struct nes_cm_node *cm_node;
574 struct nes_timer_entry *send_entry, *recv_entry;
575 struct list_head *list_core_temp;
576 struct list_head *list_node;
577 struct nes_cm_core *cm_core = g_cm_core;
579 unsigned long timetosend;
580 int ret = NETDEV_TX_OK;
582 struct list_head timer_list;
583 INIT_LIST_HEAD(&timer_list);
584 spin_lock_irqsave(&cm_core->ht_lock, flags);
586 list_for_each_safe(list_node, list_core_temp,
587 &cm_core->connected_nodes) {
588 cm_node = container_of(list_node, struct nes_cm_node, list);
589 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
590 add_ref_cm_node(cm_node);
591 list_add(&cm_node->timer_entry, &timer_list);
594 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
596 list_for_each_safe(list_node, list_core_temp, &timer_list) {
597 cm_node = container_of(list_node, struct nes_cm_node,
599 recv_entry = cm_node->recv_entry;
602 if (time_after(recv_entry->timetosend, jiffies)) {
603 if (nexttimeout > recv_entry->timetosend ||
605 nexttimeout = recv_entry->timetosend;
609 handle_recv_entry(cm_node, 1);
612 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
614 send_entry = cm_node->send_entry;
617 if (time_after(send_entry->timetosend, jiffies)) {
618 if (cm_node->state != NES_CM_STATE_TSA) {
620 send_entry->timetosend) ||
623 send_entry->timetosend;
627 free_retrans_entry(cm_node);
632 if ((cm_node->state == NES_CM_STATE_TSA) ||
633 (cm_node->state == NES_CM_STATE_CLOSED)) {
634 free_retrans_entry(cm_node);
638 if (!send_entry->retranscount ||
639 !send_entry->retrycount) {
640 cm_packets_dropped++;
641 free_retrans_entry(cm_node);
643 spin_unlock_irqrestore(
644 &cm_node->retrans_list_lock, flags);
645 nes_retrans_expired(cm_node);
646 cm_node->state = NES_CM_STATE_CLOSED;
647 spin_lock_irqsave(&cm_node->retrans_list_lock,
651 atomic_inc(&send_entry->skb->users);
652 cm_packets_retrans++;
653 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
654 "for node %p, jiffies = %lu, time to send = "
655 "%lu, retranscount = %u, send_entry->seq_num = "
656 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
657 "0x%08X\n", send_entry, cm_node, jiffies,
658 send_entry->timetosend,
659 send_entry->retranscount,
661 cm_node->tcp_cntxt.rem_ack_num);
663 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
665 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
666 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
667 if (ret != NETDEV_TX_OK) {
668 nes_debug(NES_DBG_CM, "rexmit failed for "
669 "node=%p\n", cm_node);
670 cm_packets_bounced++;
671 send_entry->retrycount--;
672 nexttimeout = jiffies + NES_SHORT_TIME;
678 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
679 "%u, retry count = %u.\n",
680 send_entry->retranscount,
681 send_entry->retrycount);
682 if (send_entry->send_retrans) {
683 send_entry->retranscount--;
684 timetosend = (NES_RETRY_TIMEOUT <<
685 (NES_DEFAULT_RETRANS - send_entry->retranscount));
687 send_entry->timetosend = jiffies +
688 min(timetosend, NES_MAX_TIMEOUT);
689 if (nexttimeout > send_entry->timetosend ||
691 nexttimeout = send_entry->timetosend;
695 int close_when_complete;
696 close_when_complete =
697 send_entry->close_when_complete;
698 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
699 cm_node, cm_node->state);
700 free_retrans_entry(cm_node);
701 if (close_when_complete)
702 rem_ref_cm_node(cm_node->cm_core,
707 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
708 rem_ref_cm_node(cm_node->cm_core, cm_node);
712 if (!timer_pending(&cm_core->tcp_timer)) {
713 cm_core->tcp_timer.expires = nexttimeout;
714 add_timer(&cm_core->tcp_timer);
723 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
728 char optionsbuffer[sizeof(struct option_mss) +
729 sizeof(struct option_windowscale) + sizeof(struct option_base) +
730 TCP_OPTIONS_PADDING];
733 /* Sending MSS option */
734 union all_known_options *options;
739 options = (union all_known_options *)&optionsbuffer[optionssize];
740 options->as_mss.optionnum = OPTION_NUMBER_MSS;
741 options->as_mss.length = sizeof(struct option_mss);
742 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
743 optionssize += sizeof(struct option_mss);
745 options = (union all_known_options *)&optionsbuffer[optionssize];
746 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
747 options->as_windowscale.length = sizeof(struct option_windowscale);
748 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
749 optionssize += sizeof(struct option_windowscale);
751 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
752 options = (union all_known_options *)&optionsbuffer[optionssize];
753 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
754 options->as_base.length = sizeof(struct option_base);
755 optionssize += sizeof(struct option_base);
756 /* we need the size to be a multiple of 4 */
757 options = (union all_known_options *)&optionsbuffer[optionssize];
760 options = (union all_known_options *)&optionsbuffer[optionssize];
765 options = (union all_known_options *)&optionsbuffer[optionssize];
766 options->as_end = OPTION_NUMBER_END;
770 skb = dev_alloc_skb(MAX_CM_BUFFER);
772 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
779 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
780 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
789 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
792 int flags = SET_RST | SET_ACK;
795 skb = dev_alloc_skb(MAX_CM_BUFFER);
797 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
801 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
802 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
811 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
816 skb = dev_alloc_skb(MAX_CM_BUFFER);
819 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
823 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
824 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
833 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
837 /* if we didn't get a frame get one */
839 skb = dev_alloc_skb(MAX_CM_BUFFER);
842 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
846 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
847 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
854 * find_node - find a cm node that matches the reference cm node
856 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
857 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
860 struct list_head *hte;
861 struct nes_cm_node *cm_node;
863 /* get a handle on the hte */
864 hte = &cm_core->connected_nodes;
866 /* walk list and find cm_node associated with this session ID */
867 spin_lock_irqsave(&cm_core->ht_lock, flags);
868 list_for_each_entry(cm_node, hte, list) {
869 /* compare quad, return node handle if a match */
870 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
871 cm_node->loc_addr, cm_node->loc_port,
873 cm_node->rem_addr, cm_node->rem_port,
875 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
876 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
877 add_ref_cm_node(cm_node);
878 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
882 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
890 * find_listener - find a cm node listening on this addr-port pair
892 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
893 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
896 struct nes_cm_listener *listen_node;
898 /* walk list and find cm_node associated with this session ID */
899 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
900 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
901 /* compare node pair, return node handle if a match */
902 if (((listen_node->loc_addr == dst_addr) ||
903 listen_node->loc_addr == 0x00000000) &&
904 (listen_node->loc_port == dst_port) &&
905 (listener_state & listen_node->listener_state)) {
906 atomic_inc(&listen_node->ref_count);
907 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
911 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
919 * add_hte_node - add a cm node to the hash table
921 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
924 struct list_head *hte;
926 if (!cm_node || !cm_core)
929 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
932 spin_lock_irqsave(&cm_core->ht_lock, flags);
934 /* get a handle on the hash table element (list head for this slot) */
935 hte = &cm_core->connected_nodes;
936 list_add_tail(&cm_node->list, hte);
937 atomic_inc(&cm_core->ht_node_cnt);
939 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
946 * mini_cm_dec_refcnt_listen
948 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
949 struct nes_cm_listener *listener, int free_hanging_nodes)
954 struct list_head *list_pos = NULL;
955 struct list_head *list_temp = NULL;
956 struct nes_cm_node *cm_node = NULL;
957 struct list_head reset_list;
959 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
960 "refcnt=%d\n", listener, free_hanging_nodes,
961 atomic_read(&listener->ref_count));
962 /* free non-accelerated child nodes for this listener */
963 INIT_LIST_HEAD(&reset_list);
964 if (free_hanging_nodes) {
965 spin_lock_irqsave(&cm_core->ht_lock, flags);
966 list_for_each_safe(list_pos, list_temp,
967 &g_cm_core->connected_nodes) {
968 cm_node = container_of(list_pos, struct nes_cm_node,
970 if ((cm_node->listener == listener) &&
971 (!cm_node->accelerated)) {
972 add_ref_cm_node(cm_node);
973 list_add(&cm_node->reset_entry, &reset_list);
976 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
979 list_for_each_safe(list_pos, list_temp, &reset_list) {
980 cm_node = container_of(list_pos, struct nes_cm_node,
983 struct nes_cm_node *loopback = cm_node->loopbackpartner;
984 enum nes_cm_node_state old_state;
985 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
986 rem_ref_cm_node(cm_node->cm_core, cm_node);
989 cleanup_retrans_entry(cm_node);
990 err = send_reset(cm_node, NULL);
996 old_state = cm_node->state;
997 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
998 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1004 struct nes_cm_event event;
1006 event.cm_node = loopback;
1007 event.cm_info.rem_addr =
1009 event.cm_info.loc_addr =
1011 event.cm_info.rem_port =
1013 event.cm_info.loc_port =
1015 event.cm_info.cm_id = loopback->cm_id;
1016 add_ref_cm_node(loopback);
1017 loopback->state = NES_CM_STATE_CLOSED;
1018 cm_event_connect_error(&event);
1019 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1021 rem_ref_cm_node(cm_node->cm_core,
1029 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1030 if (!atomic_dec_return(&listener->ref_count)) {
1031 list_del(&listener->list);
1033 /* decrement our listen node count */
1034 atomic_dec(&cm_core->listen_node_cnt);
1036 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1038 if (listener->nesvnic) {
1039 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1040 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1043 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1048 atomic_inc(&cm_listens_destroyed);
1050 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1053 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1054 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1055 " with non-zero pending accepts=%u\n",
1056 listener, atomic_read(&listener->pend_accepts_cnt));
1064 * mini_cm_del_listen
1066 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1067 struct nes_cm_listener *listener)
1069 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1070 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1071 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1076 * mini_cm_accelerated
1078 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1079 struct nes_cm_node *cm_node)
1082 cm_node->accelerated = 1;
1084 if (cm_node->accept_pend) {
1085 BUG_ON(!cm_node->listener);
1086 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1087 cm_node->accept_pend = 0;
1088 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1091 was_timer_set = timer_pending(&cm_core->tcp_timer);
1092 if (!was_timer_set) {
1093 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1094 add_timer(&cm_core->tcp_timer);
1102 * nes_addr_resolve_neigh
1104 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1108 struct neighbour *neigh;
1110 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1112 memset(&fl, 0, sizeof fl);
1113 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1114 if (ip_route_output_key(&init_net, &rt, &fl)) {
1115 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1120 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1122 if (neigh->nud_state & NUD_VALID) {
1123 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1124 " is %pM, Gateway is 0x%08X \n", dst_ip,
1125 neigh->ha, ntohl(rt->rt_gateway));
1127 if (arpindex >= 0) {
1128 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1129 neigh->ha, ETH_ALEN)){
1130 /* Mac address same as in nes_arp_table */
1131 neigh_release(neigh);
1136 nes_manage_arp_cache(nesvnic->netdev,
1137 nesadapter->arp_table[arpindex].mac_addr,
1138 dst_ip, NES_ARP_DELETE);
1141 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1142 dst_ip, NES_ARP_ADD);
1143 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1146 neigh_release(neigh);
1149 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1150 neigh_event_send(rt->dst.neighbour, NULL);
1157 * make_cm_node - create a new instance of a cm node
1159 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1160 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1161 struct nes_cm_listener *listener)
1163 struct nes_cm_node *cm_node;
1165 int oldarpindex = 0;
1167 struct nes_device *nesdev;
1168 struct nes_adapter *nesadapter;
1170 /* create an hte and cm_node for this instance */
1171 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1175 /* set our node specific transport info */
1176 cm_node->loc_addr = cm_info->loc_addr;
1177 cm_node->rem_addr = cm_info->rem_addr;
1178 cm_node->loc_port = cm_info->loc_port;
1179 cm_node->rem_port = cm_info->rem_port;
1180 cm_node->send_write0 = send_first;
1181 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1182 &cm_node->loc_addr, cm_node->loc_port,
1183 &cm_node->rem_addr, cm_node->rem_port);
1184 cm_node->listener = listener;
1185 cm_node->netdev = nesvnic->netdev;
1186 cm_node->cm_id = cm_info->cm_id;
1187 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1189 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1192 spin_lock_init(&cm_node->retrans_list_lock);
1194 cm_node->loopbackpartner = NULL;
1195 atomic_set(&cm_node->ref_count, 1);
1196 /* associate our parent CM core */
1197 cm_node->cm_core = cm_core;
1198 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1199 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1200 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1201 NES_CM_DEFAULT_RCV_WND_SCALE;
1202 ts = current_kernel_time();
1203 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1204 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1205 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1206 cm_node->tcp_cntxt.rcv_nxt = 0;
1207 /* get a unique session ID , add thread_id to an upcounter to handle race */
1208 atomic_inc(&cm_core->node_cnt);
1209 cm_node->conn_type = cm_info->conn_type;
1210 cm_node->apbvt_set = 0;
1211 cm_node->accept_pend = 0;
1213 cm_node->nesvnic = nesvnic;
1214 /* get some device handles, for arp lookup */
1215 nesdev = nesvnic->nesdev;
1216 nesadapter = nesdev->nesadapter;
1218 cm_node->loopbackpartner = NULL;
1220 /* get the mac addr for the remote node */
1221 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1222 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1224 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1225 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1233 /* copy the mac addr to node context */
1234 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1235 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1238 add_hte_node(cm_core, cm_node);
1239 atomic_inc(&cm_nodes_created);
1246 * add_ref_cm_node - destroy an instance of a cm node
1248 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1250 atomic_inc(&cm_node->ref_count);
1256 * rem_ref_cm_node - destroy an instance of a cm node
1258 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1259 struct nes_cm_node *cm_node)
1261 unsigned long flags;
1262 struct nes_qp *nesqp;
1267 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1268 if (atomic_dec_return(&cm_node->ref_count)) {
1269 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1272 list_del(&cm_node->list);
1273 atomic_dec(&cm_core->ht_node_cnt);
1274 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1276 /* if the node is destroyed before connection was accelerated */
1277 if (!cm_node->accelerated && cm_node->accept_pend) {
1278 BUG_ON(!cm_node->listener);
1279 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1280 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1282 WARN_ON(cm_node->send_entry);
1283 if (cm_node->recv_entry)
1284 handle_recv_entry(cm_node, 0);
1285 if (cm_node->listener) {
1286 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1288 if (cm_node->apbvt_set && cm_node->nesvnic) {
1289 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1291 cm_node->nesvnic->nesdev->pcidev->devfn),
1292 NES_MANAGE_APBVT_DEL);
1296 atomic_dec(&cm_core->node_cnt);
1297 atomic_inc(&cm_nodes_destroyed);
1298 nesqp = cm_node->nesqp;
1300 nesqp->cm_node = NULL;
1301 nes_rem_ref(&nesqp->ibqp);
1302 cm_node->nesqp = NULL;
1312 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1313 u32 optionsize, u32 syn_packet)
1317 union all_known_options *all_options;
1318 char got_mss_option = 0;
1320 while (offset < optionsize) {
1321 all_options = (union all_known_options *)(optionsloc + offset);
1322 switch (all_options->as_base.optionnum) {
1323 case OPTION_NUMBER_END:
1324 offset = optionsize;
1326 case OPTION_NUMBER_NONE:
1329 case OPTION_NUMBER_MSS:
1330 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1331 "Size: %d\n", __func__,
1332 all_options->as_mss.length, offset, optionsize);
1334 if (all_options->as_mss.length != 4) {
1337 tmp = ntohs(all_options->as_mss.mss);
1338 if (tmp > 0 && tmp <
1339 cm_node->tcp_cntxt.mss)
1340 cm_node->tcp_cntxt.mss = tmp;
1343 case OPTION_NUMBER_WINDOW_SCALE:
1344 cm_node->tcp_cntxt.snd_wscale =
1345 all_options->as_windowscale.shiftcount;
1347 case OPTION_NUMBER_WRITE0:
1348 cm_node->send_write0 = 1;
1351 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1352 all_options->as_base.optionnum);
1355 offset += all_options->as_base.length;
1357 if ((!got_mss_option) && (syn_packet))
1358 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1362 static void drop_packet(struct sk_buff *skb)
1364 atomic_inc(&cm_accel_dropped_pkts);
1365 dev_kfree_skb_any(skb);
1368 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1370 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1371 "refcnt=%d\n", cm_node, cm_node->state,
1372 atomic_read(&cm_node->ref_count));
1373 switch (cm_node->state) {
1374 case NES_CM_STATE_SYN_RCVD:
1375 case NES_CM_STATE_SYN_SENT:
1376 case NES_CM_STATE_ESTABLISHED:
1377 case NES_CM_STATE_MPAREJ_RCVD:
1378 cm_node->tcp_cntxt.rcv_nxt++;
1379 cleanup_retrans_entry(cm_node);
1380 cm_node->state = NES_CM_STATE_LAST_ACK;
1381 send_fin(cm_node, NULL);
1383 case NES_CM_STATE_MPAREQ_SENT:
1384 create_event(cm_node, NES_CM_EVENT_ABORTED);
1385 cm_node->tcp_cntxt.rcv_nxt++;
1386 cleanup_retrans_entry(cm_node);
1387 cm_node->state = NES_CM_STATE_CLOSED;
1388 add_ref_cm_node(cm_node);
1389 send_reset(cm_node, NULL);
1391 case NES_CM_STATE_FIN_WAIT1:
1392 cm_node->tcp_cntxt.rcv_nxt++;
1393 cleanup_retrans_entry(cm_node);
1394 cm_node->state = NES_CM_STATE_CLOSING;
1395 send_ack(cm_node, NULL);
1396 /* Wait for ACK as this is simultanous close..
1397 * After we receive ACK, do not send anything..
1398 * Just rm the node.. Done.. */
1400 case NES_CM_STATE_FIN_WAIT2:
1401 cm_node->tcp_cntxt.rcv_nxt++;
1402 cleanup_retrans_entry(cm_node);
1403 cm_node->state = NES_CM_STATE_TIME_WAIT;
1404 send_ack(cm_node, NULL);
1405 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1407 case NES_CM_STATE_TIME_WAIT:
1408 cm_node->tcp_cntxt.rcv_nxt++;
1409 cleanup_retrans_entry(cm_node);
1410 cm_node->state = NES_CM_STATE_CLOSED;
1411 rem_ref_cm_node(cm_node->cm_core, cm_node);
1413 case NES_CM_STATE_TSA:
1415 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1416 cm_node, cm_node->state);
1422 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1423 struct tcphdr *tcph)
1426 int reset = 0; /* whether to send reset in case of err.. */
1427 atomic_inc(&cm_resets_recvd);
1428 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1429 " refcnt=%d\n", cm_node, cm_node->state,
1430 atomic_read(&cm_node->ref_count));
1431 cleanup_retrans_entry(cm_node);
1432 switch (cm_node->state) {
1433 case NES_CM_STATE_SYN_SENT:
1434 case NES_CM_STATE_MPAREQ_SENT:
1435 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1436 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1437 cm_node->listener, cm_node->state);
1438 active_open_err(cm_node, skb, reset);
1440 case NES_CM_STATE_MPAREQ_RCVD:
1441 atomic_inc(&cm_node->passive_state);
1442 dev_kfree_skb_any(skb);
1444 case NES_CM_STATE_ESTABLISHED:
1445 case NES_CM_STATE_SYN_RCVD:
1446 case NES_CM_STATE_LISTENING:
1447 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1448 passive_open_err(cm_node, skb, reset);
1450 case NES_CM_STATE_TSA:
1451 active_open_err(cm_node, skb, reset);
1453 case NES_CM_STATE_CLOSED:
1456 case NES_CM_STATE_FIN_WAIT2:
1457 case NES_CM_STATE_FIN_WAIT1:
1458 case NES_CM_STATE_LAST_ACK:
1459 cm_node->cm_id->rem_ref(cm_node->cm_id);
1460 case NES_CM_STATE_TIME_WAIT:
1461 cm_node->state = NES_CM_STATE_CLOSED;
1462 rem_ref_cm_node(cm_node->cm_core, cm_node);
1472 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1476 int datasize = skb->len;
1477 u8 *dataloc = skb->data;
1479 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1481 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1483 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1484 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1485 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1486 "cm_node=%p listener=%p state=%d\n", __func__,
1487 __LINE__, cm_node, cm_node->listener,
1489 active_open_err(cm_node, skb, 1);
1491 passive_open_err(cm_node, skb, 1);
1496 switch (cm_node->state) {
1497 case NES_CM_STATE_ESTABLISHED:
1498 if (res_type == NES_MPA_REQUEST_REJECT) {
1499 /*BIG problem as we are receiving the MPA.. So should
1500 * not be REJECT.. This is Passive Open.. We can
1501 * only receive it Reject for Active Open...*/
1504 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1505 type = NES_CM_EVENT_MPA_REQ;
1506 atomic_set(&cm_node->passive_state,
1507 NES_PASSIVE_STATE_INDICATED);
1509 case NES_CM_STATE_MPAREQ_SENT:
1510 cleanup_retrans_entry(cm_node);
1511 if (res_type == NES_MPA_REQUEST_REJECT) {
1512 type = NES_CM_EVENT_MPA_REJECT;
1513 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1515 type = NES_CM_EVENT_CONNECTED;
1516 cm_node->state = NES_CM_STATE_TSA;
1524 dev_kfree_skb_any(skb);
1525 create_event(cm_node, type);
1528 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1530 switch (cm_node->state) {
1531 case NES_CM_STATE_SYN_SENT:
1532 case NES_CM_STATE_MPAREQ_SENT:
1533 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1534 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1535 cm_node->listener, cm_node->state);
1536 active_open_err(cm_node, skb, 1);
1538 case NES_CM_STATE_ESTABLISHED:
1539 case NES_CM_STATE_SYN_RCVD:
1540 passive_open_err(cm_node, skb, 1);
1542 case NES_CM_STATE_TSA:
1548 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1549 struct sk_buff *skb)
1553 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1555 active_open_err(cm_node, skb, 1);
1560 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1561 struct sk_buff *skb)
1566 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1567 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1569 seq = ntohl(tcph->seq);
1570 ack_seq = ntohl(tcph->ack_seq);
1571 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1572 if (ack_seq != loc_seq_num)
1574 else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
1577 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1578 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1579 cm_node->listener, cm_node->state);
1580 indicate_pkt_err(cm_node, skb);
1581 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1582 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1589 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1590 * is created with a listener or it may comein as rexmitted packet which in
1591 * that case will be just dropped.
1594 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1595 struct tcphdr *tcph)
1601 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1603 inc_sequence = ntohl(tcph->seq);
1605 switch (cm_node->state) {
1606 case NES_CM_STATE_SYN_SENT:
1607 case NES_CM_STATE_MPAREQ_SENT:
1608 /* Rcvd syn on active open connection*/
1609 active_open_err(cm_node, skb, 1);
1611 case NES_CM_STATE_LISTENING:
1613 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1614 cm_node->listener->backlog) {
1615 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1618 passive_open_err(cm_node, skb, 0);
1621 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1624 passive_open_err(cm_node, skb, 0);
1628 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1629 BUG_ON(cm_node->send_entry);
1630 cm_node->accept_pend = 1;
1631 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1633 cm_node->state = NES_CM_STATE_SYN_RCVD;
1634 send_syn(cm_node, 1, skb);
1636 case NES_CM_STATE_CLOSED:
1637 cleanup_retrans_entry(cm_node);
1638 add_ref_cm_node(cm_node);
1639 send_reset(cm_node, skb);
1641 case NES_CM_STATE_TSA:
1642 case NES_CM_STATE_ESTABLISHED:
1643 case NES_CM_STATE_FIN_WAIT1:
1644 case NES_CM_STATE_FIN_WAIT2:
1645 case NES_CM_STATE_MPAREQ_RCVD:
1646 case NES_CM_STATE_LAST_ACK:
1647 case NES_CM_STATE_CLOSING:
1648 case NES_CM_STATE_UNKNOWN:
1655 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1656 struct tcphdr *tcph)
1663 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1665 inc_sequence = ntohl(tcph->seq);
1666 switch (cm_node->state) {
1667 case NES_CM_STATE_SYN_SENT:
1668 cleanup_retrans_entry(cm_node);
1670 if (check_syn(cm_node, tcph, skb))
1672 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1674 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1676 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1680 cleanup_retrans_entry(cm_node);
1681 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1682 send_mpa_request(cm_node, skb);
1683 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1685 case NES_CM_STATE_MPAREQ_RCVD:
1686 /* passive open, so should not be here */
1687 passive_open_err(cm_node, skb, 1);
1689 case NES_CM_STATE_LISTENING:
1690 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1691 cleanup_retrans_entry(cm_node);
1692 cm_node->state = NES_CM_STATE_CLOSED;
1693 send_reset(cm_node, skb);
1695 case NES_CM_STATE_CLOSED:
1696 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1697 cleanup_retrans_entry(cm_node);
1698 add_ref_cm_node(cm_node);
1699 send_reset(cm_node, skb);
1701 case NES_CM_STATE_ESTABLISHED:
1702 case NES_CM_STATE_FIN_WAIT1:
1703 case NES_CM_STATE_FIN_WAIT2:
1704 case NES_CM_STATE_LAST_ACK:
1705 case NES_CM_STATE_TSA:
1706 case NES_CM_STATE_CLOSING:
1707 case NES_CM_STATE_UNKNOWN:
1708 case NES_CM_STATE_MPAREQ_SENT:
1715 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1716 struct tcphdr *tcph)
1722 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1724 if (check_seq(cm_node, tcph, skb))
1727 skb_pull(skb, tcph->doff << 2);
1728 inc_sequence = ntohl(tcph->seq);
1729 datasize = skb->len;
1730 switch (cm_node->state) {
1731 case NES_CM_STATE_SYN_RCVD:
1733 cleanup_retrans_entry(cm_node);
1734 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1737 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1738 cm_node->state = NES_CM_STATE_ESTABLISHED;
1740 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1741 handle_rcv_mpa(cm_node, skb);
1742 } else /* rcvd ACK only */
1743 dev_kfree_skb_any(skb);
1745 case NES_CM_STATE_ESTABLISHED:
1747 cleanup_retrans_entry(cm_node);
1749 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1750 handle_rcv_mpa(cm_node, skb);
1754 case NES_CM_STATE_MPAREQ_SENT:
1755 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1757 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1758 handle_rcv_mpa(cm_node, skb);
1759 } else /* Could be just an ack pkt.. */
1760 dev_kfree_skb_any(skb);
1762 case NES_CM_STATE_LISTENING:
1763 cleanup_retrans_entry(cm_node);
1764 cm_node->state = NES_CM_STATE_CLOSED;
1765 send_reset(cm_node, skb);
1767 case NES_CM_STATE_CLOSED:
1768 cleanup_retrans_entry(cm_node);
1769 add_ref_cm_node(cm_node);
1770 send_reset(cm_node, skb);
1772 case NES_CM_STATE_LAST_ACK:
1773 case NES_CM_STATE_CLOSING:
1774 cleanup_retrans_entry(cm_node);
1775 cm_node->state = NES_CM_STATE_CLOSED;
1776 cm_node->cm_id->rem_ref(cm_node->cm_id);
1777 rem_ref_cm_node(cm_node->cm_core, cm_node);
1780 case NES_CM_STATE_FIN_WAIT1:
1781 cleanup_retrans_entry(cm_node);
1783 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1785 case NES_CM_STATE_SYN_SENT:
1786 case NES_CM_STATE_FIN_WAIT2:
1787 case NES_CM_STATE_TSA:
1788 case NES_CM_STATE_MPAREQ_RCVD:
1789 case NES_CM_STATE_UNKNOWN:
1791 cleanup_retrans_entry(cm_node);
1800 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1801 struct sk_buff *skb, int optionsize, int passive)
1803 u8 *optionsloc = (u8 *)&tcph[1];
1805 if (process_options(cm_node, optionsloc, optionsize,
1807 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1810 passive_open_err(cm_node, skb, 1);
1812 active_open_err(cm_node, skb, 1);
1817 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1818 cm_node->tcp_cntxt.snd_wscale;
1820 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1821 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1826 * active_open_err() will send reset() if flag set..
1827 * It will also send ABORT event.
1830 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1833 cleanup_retrans_entry(cm_node);
1835 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1836 "state=%d\n", cm_node, cm_node->state);
1837 add_ref_cm_node(cm_node);
1838 send_reset(cm_node, skb);
1840 dev_kfree_skb_any(skb);
1842 cm_node->state = NES_CM_STATE_CLOSED;
1843 create_event(cm_node, NES_CM_EVENT_ABORTED);
1847 * passive_open_err() will either do a reset() or will free up the skb and
1848 * remove the cm_node.
1851 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1854 cleanup_retrans_entry(cm_node);
1855 cm_node->state = NES_CM_STATE_CLOSED;
1857 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1858 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1859 send_reset(cm_node, skb);
1861 dev_kfree_skb_any(skb);
1862 rem_ref_cm_node(cm_node->cm_core, cm_node);
1867 * free_retrans_entry() routines assumes that the retrans_list_lock has
1868 * been acquired before calling.
1870 static void free_retrans_entry(struct nes_cm_node *cm_node)
1872 struct nes_timer_entry *send_entry;
1873 send_entry = cm_node->send_entry;
1875 cm_node->send_entry = NULL;
1876 dev_kfree_skb_any(send_entry->skb);
1878 rem_ref_cm_node(cm_node->cm_core, cm_node);
1882 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1884 unsigned long flags;
1886 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1887 free_retrans_entry(cm_node);
1888 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1893 * Returns skb if to be freed, else it will return NULL if already used..
1895 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1896 struct nes_cm_core *cm_core)
1898 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1899 struct tcphdr *tcph = tcp_hdr(skb);
1902 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1904 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1905 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1906 tcph->ack, tcph->rst, tcph->fin);
1909 pkt_type = NES_PKT_TYPE_RST;
1910 else if (tcph->syn) {
1911 pkt_type = NES_PKT_TYPE_SYN;
1913 pkt_type = NES_PKT_TYPE_SYNACK;
1914 } else if (tcph->ack)
1915 pkt_type = NES_PKT_TYPE_ACK;
1920 case NES_PKT_TYPE_SYN:
1921 handle_syn_pkt(cm_node, skb, tcph);
1923 case NES_PKT_TYPE_SYNACK:
1924 handle_synack_pkt(cm_node, skb, tcph);
1926 case NES_PKT_TYPE_ACK:
1927 ret = handle_ack_pkt(cm_node, skb, tcph);
1928 if (fin_set && !ret)
1929 handle_fin_pkt(cm_node);
1931 case NES_PKT_TYPE_RST:
1932 handle_rst_pkt(cm_node, skb, tcph);
1935 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
1936 handle_fin_pkt(cm_node);
1943 * mini_cm_listen - create a listen node with params
1945 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1946 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1948 struct nes_cm_listener *listener;
1949 unsigned long flags;
1951 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1952 cm_info->loc_addr, cm_info->loc_port);
1954 /* cannot have multiple matching listeners */
1955 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1956 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1957 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1958 /* find automatically incs ref count ??? */
1959 atomic_dec(&listener->ref_count);
1960 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1965 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1966 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1968 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1972 listener->loc_addr = htonl(cm_info->loc_addr);
1973 listener->loc_port = htons(cm_info->loc_port);
1974 listener->reused_node = 0;
1976 atomic_set(&listener->ref_count, 1);
1979 /* find already inc'ed the ref count */
1981 listener->reused_node = 1;
1984 listener->cm_id = cm_info->cm_id;
1985 atomic_set(&listener->pend_accepts_cnt, 0);
1986 listener->cm_core = cm_core;
1987 listener->nesvnic = nesvnic;
1988 atomic_inc(&cm_core->node_cnt);
1990 listener->conn_type = cm_info->conn_type;
1991 listener->backlog = cm_info->backlog;
1992 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1994 if (!listener->reused_node) {
1995 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1996 list_add(&listener->list, &cm_core->listen_list.list);
1997 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1998 atomic_inc(&cm_core->listen_node_cnt);
2001 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2002 " listener = %p, backlog = %d, cm_id = %p.\n",
2003 cm_info->loc_addr, cm_info->loc_port,
2004 listener, listener->backlog, listener->cm_id);
2011 * mini_cm_connect - make a connection node with params
2013 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2014 struct nes_vnic *nesvnic, u16 private_data_len,
2015 void *private_data, struct nes_cm_info *cm_info)
2018 struct nes_cm_node *cm_node;
2019 struct nes_cm_listener *loopbackremotelistener;
2020 struct nes_cm_node *loopbackremotenode;
2021 struct nes_cm_info loopback_cm_info;
2022 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
2023 struct ietf_mpa_frame *mpa_frame = NULL;
2025 /* create a CM connection node */
2026 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2029 mpa_frame = &cm_node->mpa_frame;
2030 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
2031 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2032 mpa_frame->rev = IETF_MPA_VERSION;
2033 mpa_frame->priv_data_len = htons(private_data_len);
2035 /* set our node side to client (active) side */
2036 cm_node->tcp_cntxt.client = 1;
2037 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2039 if (cm_info->loc_addr == cm_info->rem_addr) {
2040 loopbackremotelistener = find_listener(cm_core,
2041 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2042 NES_CM_LISTENER_ACTIVE_STATE);
2043 if (loopbackremotelistener == NULL) {
2044 create_event(cm_node, NES_CM_EVENT_ABORTED);
2046 loopback_cm_info = *cm_info;
2047 loopback_cm_info.loc_port = cm_info->rem_port;
2048 loopback_cm_info.rem_port = cm_info->loc_port;
2049 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2050 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2051 &loopback_cm_info, loopbackremotelistener);
2052 if (!loopbackremotenode) {
2053 rem_ref_cm_node(cm_node->cm_core, cm_node);
2056 atomic_inc(&cm_loopbacks);
2057 loopbackremotenode->loopbackpartner = cm_node;
2058 loopbackremotenode->tcp_cntxt.rcv_wscale =
2059 NES_CM_DEFAULT_RCV_WND_SCALE;
2060 cm_node->loopbackpartner = loopbackremotenode;
2061 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2063 loopbackremotenode->mpa_frame_size = private_data_len;
2065 /* we are done handling this state. */
2066 /* set node to a TSA state */
2067 cm_node->state = NES_CM_STATE_TSA;
2068 cm_node->tcp_cntxt.rcv_nxt =
2069 loopbackremotenode->tcp_cntxt.loc_seq_num;
2070 loopbackremotenode->tcp_cntxt.rcv_nxt =
2071 cm_node->tcp_cntxt.loc_seq_num;
2072 cm_node->tcp_cntxt.max_snd_wnd =
2073 loopbackremotenode->tcp_cntxt.rcv_wnd;
2074 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2075 cm_node->tcp_cntxt.rcv_wnd;
2076 cm_node->tcp_cntxt.snd_wnd =
2077 loopbackremotenode->tcp_cntxt.rcv_wnd;
2078 loopbackremotenode->tcp_cntxt.snd_wnd =
2079 cm_node->tcp_cntxt.rcv_wnd;
2080 cm_node->tcp_cntxt.snd_wscale =
2081 loopbackremotenode->tcp_cntxt.rcv_wscale;
2082 loopbackremotenode->tcp_cntxt.snd_wscale =
2083 cm_node->tcp_cntxt.rcv_wscale;
2084 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2085 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2090 /* set our node side to client (active) side */
2091 cm_node->tcp_cntxt.client = 1;
2092 /* init our MPA frame ptr */
2093 memcpy(mpa_frame->priv_data, private_data, private_data_len);
2095 cm_node->mpa_frame_size = mpa_frame_size;
2097 /* send a syn and goto syn sent state */
2098 cm_node->state = NES_CM_STATE_SYN_SENT;
2099 ret = send_syn(cm_node, 0, NULL);
2102 /* error in sending the syn free up the cm_node struct */
2103 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2104 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2105 cm_node->rem_addr, cm_node->rem_port, cm_node,
2107 rem_ref_cm_node(cm_node->cm_core, cm_node);
2112 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2113 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2114 cm_node->rem_addr, cm_node->rem_port, cm_node,
2122 * mini_cm_accept - accept a connection
2123 * This function is never called
2125 static int mini_cm_accept(struct nes_cm_core *cm_core,
2126 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2133 * mini_cm_reject - reject and teardown a connection
2135 static int mini_cm_reject(struct nes_cm_core *cm_core,
2136 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2141 struct nes_cm_event event;
2142 struct iw_cm_id *cm_id = cm_node->cm_id;
2143 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2145 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2146 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2148 if (cm_node->tcp_cntxt.client)
2150 cleanup_retrans_entry(cm_node);
2153 passive_state = atomic_add_return(1, &cm_node->passive_state);
2154 if (passive_state == NES_SEND_RESET_EVENT) {
2155 cm_node->state = NES_CM_STATE_CLOSED;
2156 rem_ref_cm_node(cm_core, cm_node);
2158 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2159 rem_ref_cm_node(cm_core, cm_node);
2161 ret = send_mpa_reject(cm_node);
2163 cm_node->state = NES_CM_STATE_CLOSED;
2164 err = send_reset(cm_node, NULL);
2168 cm_id->add_ref(cm_id);
2172 cm_node->cm_id = NULL;
2173 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2174 rem_ref_cm_node(cm_core, cm_node);
2175 rem_ref_cm_node(cm_core, loopback);
2177 event.cm_node = loopback;
2178 event.cm_info.rem_addr = loopback->rem_addr;
2179 event.cm_info.loc_addr = loopback->loc_addr;
2180 event.cm_info.rem_port = loopback->rem_port;
2181 event.cm_info.loc_port = loopback->loc_port;
2182 event.cm_info.cm_id = loopback->cm_id;
2183 cm_event_mpa_reject(&event);
2184 rem_ref_cm_node(cm_core, cm_node);
2185 loopback->state = NES_CM_STATE_CLOSING;
2187 cm_id = loopback->cm_id;
2188 rem_ref_cm_node(cm_core, loopback);
2189 cm_id->rem_ref(cm_id);
2200 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2204 if (!cm_core || !cm_node)
2207 switch (cm_node->state) {
2208 case NES_CM_STATE_SYN_RCVD:
2209 case NES_CM_STATE_SYN_SENT:
2210 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2211 case NES_CM_STATE_ESTABLISHED:
2212 case NES_CM_STATE_ACCEPTING:
2213 case NES_CM_STATE_MPAREQ_SENT:
2214 case NES_CM_STATE_MPAREQ_RCVD:
2215 cleanup_retrans_entry(cm_node);
2216 send_reset(cm_node, NULL);
2218 case NES_CM_STATE_CLOSE_WAIT:
2219 cm_node->state = NES_CM_STATE_LAST_ACK;
2220 send_fin(cm_node, NULL);
2222 case NES_CM_STATE_FIN_WAIT1:
2223 case NES_CM_STATE_FIN_WAIT2:
2224 case NES_CM_STATE_LAST_ACK:
2225 case NES_CM_STATE_TIME_WAIT:
2226 case NES_CM_STATE_CLOSING:
2229 case NES_CM_STATE_LISTENING:
2230 cleanup_retrans_entry(cm_node);
2231 send_reset(cm_node, NULL);
2233 case NES_CM_STATE_MPAREJ_RCVD:
2234 case NES_CM_STATE_UNKNOWN:
2235 case NES_CM_STATE_INITED:
2236 case NES_CM_STATE_CLOSED:
2237 case NES_CM_STATE_LISTENER_DESTROYED:
2238 ret = rem_ref_cm_node(cm_core, cm_node);
2240 case NES_CM_STATE_TSA:
2241 if (cm_node->send_entry)
2242 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2243 "send_entry=%p\n", cm_node->send_entry);
2244 ret = rem_ref_cm_node(cm_core, cm_node);
2252 * recv_pkt - recv an ETHERNET packet, and process it through CM
2253 * node state machine
2255 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2256 struct nes_vnic *nesvnic, struct sk_buff *skb)
2258 struct nes_cm_node *cm_node = NULL;
2259 struct nes_cm_listener *listener = NULL;
2261 struct tcphdr *tcph;
2262 struct nes_cm_info nfo;
2263 int skb_handled = 1;
2264 __be32 tmp_daddr, tmp_saddr;
2268 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2272 iph = (struct iphdr *)skb->data;
2273 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2275 nfo.loc_addr = ntohl(iph->daddr);
2276 nfo.loc_port = ntohs(tcph->dest);
2277 nfo.rem_addr = ntohl(iph->saddr);
2278 nfo.rem_port = ntohs(tcph->source);
2280 tmp_daddr = cpu_to_be32(iph->daddr);
2281 tmp_saddr = cpu_to_be32(iph->saddr);
2283 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2284 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2287 cm_node = find_node(cm_core,
2288 nfo.rem_port, nfo.rem_addr,
2289 nfo.loc_port, nfo.loc_addr);
2292 /* Only type of packet accepted are for */
2293 /* the PASSIVE open (syn only) */
2294 if ((!tcph->syn) || (tcph->ack)) {
2298 listener = find_listener(cm_core, nfo.loc_addr,
2300 NES_CM_LISTENER_ACTIVE_STATE);
2304 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2308 nfo.cm_id = listener->cm_id;
2309 nfo.conn_type = listener->conn_type;
2310 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2313 nes_debug(NES_DBG_CM, "Unable to allocate "
2315 cm_packets_dropped++;
2316 atomic_dec(&listener->ref_count);
2317 dev_kfree_skb_any(skb);
2320 if (!tcph->rst && !tcph->fin) {
2321 cm_node->state = NES_CM_STATE_LISTENING;
2323 cm_packets_dropped++;
2324 rem_ref_cm_node(cm_core, cm_node);
2325 dev_kfree_skb_any(skb);
2328 add_ref_cm_node(cm_node);
2329 } else if (cm_node->state == NES_CM_STATE_TSA) {
2330 rem_ref_cm_node(cm_core, cm_node);
2331 atomic_inc(&cm_accel_dropped_pkts);
2332 dev_kfree_skb_any(skb);
2335 skb_reset_network_header(skb);
2336 skb_set_transport_header(skb, sizeof(*tcph));
2337 skb->len = ntohs(iph->tot_len);
2338 process_packet(cm_node, skb, cm_core);
2339 rem_ref_cm_node(cm_core, cm_node);
2346 * nes_cm_alloc_core - allocate a top level instance of a cm core
2348 static struct nes_cm_core *nes_cm_alloc_core(void)
2350 struct nes_cm_core *cm_core;
2352 /* setup the CM core */
2353 /* alloc top level core control structure */
2354 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2358 INIT_LIST_HEAD(&cm_core->connected_nodes);
2359 init_timer(&cm_core->tcp_timer);
2360 cm_core->tcp_timer.function = nes_cm_timer_tick;
2362 cm_core->mtu = NES_CM_DEFAULT_MTU;
2363 cm_core->state = NES_CM_STATE_INITED;
2364 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2366 atomic_set(&cm_core->events_posted, 0);
2368 cm_core->api = &nes_cm_api;
2370 spin_lock_init(&cm_core->ht_lock);
2371 spin_lock_init(&cm_core->listen_list_lock);
2373 INIT_LIST_HEAD(&cm_core->listen_list.list);
2375 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2377 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2378 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2379 cm_core->post_event = nes_cm_post_event;
2380 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2381 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2383 print_core(cm_core);
2389 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2391 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2393 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2400 if (timer_pending(&cm_core->tcp_timer)) {
2401 del_timer(&cm_core->tcp_timer);
2404 destroy_workqueue(cm_core->event_wq);
2405 destroy_workqueue(cm_core->disconn_wq);
2406 nes_debug(NES_DBG_CM, "\n");
2416 static int mini_cm_get(struct nes_cm_core *cm_core)
2418 return cm_core->state;
2425 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2430 case NES_CM_SET_PKT_SIZE:
2431 cm_core->mtu = value;
2433 case NES_CM_SET_FREE_PKT_Q_SIZE:
2434 cm_core->free_tx_pkt_max = value;
2437 /* unknown set option */
2446 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2447 * successfully exchanged when this is called
2449 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2456 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2457 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2458 NES_QPCONTEXT_MISC_DROS);
2460 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2461 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2463 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2465 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2467 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2468 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2470 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2471 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2472 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2474 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2475 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2476 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2478 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2479 nesqp->nesqp_context->ts_recent = 0;
2480 nesqp->nesqp_context->ts_age = 0;
2481 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2482 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2483 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2484 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2485 cm_node->tcp_cntxt.rcv_wscale);
2486 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2487 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2488 nesqp->nesqp_context->srtt = 0;
2489 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2490 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2491 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2492 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2493 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2494 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2496 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2497 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2498 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2499 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2500 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2501 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2502 le32_to_cpu(nesqp->nesqp_context->misc));
2503 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2504 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2505 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2507 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2508 cm_node->state = NES_CM_STATE_TSA;
2517 int nes_cm_disconn(struct nes_qp *nesqp)
2519 struct disconn_work *work;
2521 work = kzalloc(sizeof *work, GFP_ATOMIC);
2523 return -ENOMEM; /* Timer will clean up */
2525 nes_add_ref(&nesqp->ibqp);
2526 work->nesqp = nesqp;
2527 INIT_WORK(&work->work, nes_disconnect_worker);
2528 queue_work(g_cm_core->disconn_wq, &work->work);
2534 * nes_disconnect_worker
2536 static void nes_disconnect_worker(struct work_struct *work)
2538 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2539 struct nes_qp *nesqp = dwork->nesqp;
2542 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2543 nesqp->last_aeq, nesqp->hwqp.qp_id);
2544 nes_cm_disconn_true(nesqp);
2545 nes_rem_ref(&nesqp->ibqp);
2550 * nes_cm_disconn_true
2552 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2554 unsigned long flags;
2556 struct iw_cm_id *cm_id;
2557 struct iw_cm_event cm_event;
2558 struct nes_vnic *nesvnic;
2560 u8 original_hw_tcp_state;
2561 u8 original_ibqp_state;
2562 enum iw_cm_event_status disconn_status = IW_CM_EVENT_STATUS_OK;
2563 int issue_disconn = 0;
2564 int issue_close = 0;
2565 int issue_flush = 0;
2566 u32 flush_q = NES_CQP_FLUSH_RQ;
2567 struct ib_event ibevent;
2570 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2574 spin_lock_irqsave(&nesqp->lock, flags);
2575 cm_id = nesqp->cm_id;
2576 /* make sure we havent already closed this connection */
2578 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2580 spin_unlock_irqrestore(&nesqp->lock, flags);
2584 nesvnic = to_nesvnic(nesqp->ibqp.device);
2585 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2587 original_hw_tcp_state = nesqp->hw_tcp_state;
2588 original_ibqp_state = nesqp->ibqp_state;
2589 last_ae = nesqp->last_aeq;
2591 if (nesqp->term_flags) {
2594 nesqp->cm_id = NULL;
2595 if (nesqp->flush_issued == 0) {
2596 nesqp->flush_issued = 1;
2599 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2600 ((original_ibqp_state == IB_QPS_RTS) &&
2601 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2603 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2604 disconn_status = IW_CM_EVENT_STATUS_RESET;
2607 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2608 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2609 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2610 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2612 nesqp->cm_id = NULL;
2613 if (nesqp->flush_issued == 0) {
2614 nesqp->flush_issued = 1;
2619 spin_unlock_irqrestore(&nesqp->lock, flags);
2621 if ((issue_flush) && (nesqp->destroyed == 0)) {
2622 /* Flush the queue(s) */
2623 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2624 flush_q |= NES_CQP_FLUSH_SQ;
2625 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2627 if (nesqp->term_flags) {
2628 ibevent.device = nesqp->ibqp.device;
2629 ibevent.event = nesqp->terminate_eventtype;
2630 ibevent.element.qp = &nesqp->ibqp;
2631 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2635 if ((cm_id) && (cm_id->event_handler)) {
2636 if (issue_disconn) {
2637 atomic_inc(&cm_disconnects);
2638 cm_event.event = IW_CM_EVENT_DISCONNECT;
2639 cm_event.status = disconn_status;
2640 cm_event.local_addr = cm_id->local_addr;
2641 cm_event.remote_addr = cm_id->remote_addr;
2642 cm_event.private_data = NULL;
2643 cm_event.private_data_len = 0;
2645 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2646 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2647 "cm_id = %p, refcount = %u.\n",
2648 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2649 nesqp->hwqp.sq_tail, cm_id,
2650 atomic_read(&nesqp->refcount));
2652 ret = cm_id->event_handler(cm_id, &cm_event);
2654 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2655 "returned, ret=%d\n", ret);
2659 atomic_inc(&cm_closes);
2660 nes_disconnect(nesqp, 1);
2662 cm_id->provider_data = nesqp;
2663 /* Send up the close complete event */
2664 cm_event.event = IW_CM_EVENT_CLOSE;
2665 cm_event.status = IW_CM_EVENT_STATUS_OK;
2666 cm_event.provider_data = cm_id->provider_data;
2667 cm_event.local_addr = cm_id->local_addr;
2668 cm_event.remote_addr = cm_id->remote_addr;
2669 cm_event.private_data = NULL;
2670 cm_event.private_data_len = 0;
2672 ret = cm_id->event_handler(cm_id, &cm_event);
2674 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2677 cm_id->rem_ref(cm_id);
2688 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2691 struct nes_vnic *nesvnic;
2692 struct nes_device *nesdev;
2693 struct nes_ib_device *nesibdev;
2695 nesvnic = to_nesvnic(nesqp->ibqp.device);
2699 nesdev = nesvnic->nesdev;
2700 nesibdev = nesvnic->nesibdev;
2702 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2703 netdev_refcnt_read(nesvnic->netdev));
2705 if (nesqp->active_conn) {
2707 /* indicate this connection is NOT active */
2708 nesqp->active_conn = 0;
2710 /* Need to free the Last Streaming Mode Message */
2711 if (nesqp->ietf_frame) {
2713 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2714 pci_free_consistent(nesdev->pcidev,
2715 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2716 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2720 /* close the CM node down if it is still active */
2721 if (nesqp->cm_node) {
2722 nes_debug(NES_DBG_CM, "Call close API\n");
2724 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2734 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2738 struct nes_qp *nesqp;
2739 struct nes_vnic *nesvnic;
2740 struct nes_device *nesdev;
2741 struct nes_cm_node *cm_node;
2742 struct nes_adapter *adapter;
2743 struct ib_qp_attr attr;
2744 struct iw_cm_event cm_event;
2745 struct nes_hw_qp_wqe *wqe;
2746 struct nes_v4_quad nes_quad;
2750 struct nes_ib_device *nesibdev;
2751 struct ib_mr *ibmr = NULL;
2752 struct ib_phys_buf ibphysbuf;
2753 struct nes_pd *nespd;
2756 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2760 /* get all our handles */
2761 nesqp = to_nesqp(ibqp);
2762 nesvnic = to_nesvnic(nesqp->ibqp.device);
2763 nesdev = nesvnic->nesdev;
2764 adapter = nesdev->nesadapter;
2766 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2767 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2768 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2769 nesvnic->netdev->name);
2771 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
2772 if (cm_node->loopbackpartner)
2773 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
2774 rem_ref_cm_node(cm_node->cm_core, cm_node);
2778 passive_state = atomic_add_return(1, &cm_node->passive_state);
2779 if (passive_state == NES_SEND_RESET_EVENT) {
2780 rem_ref_cm_node(cm_node->cm_core, cm_node);
2784 /* associate the node with the QP */
2785 nesqp->cm_node = (void *)cm_node;
2786 cm_node->nesqp = nesqp;
2788 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2789 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2790 atomic_inc(&cm_accepts);
2792 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2793 netdev_refcnt_read(nesvnic->netdev));
2795 /* allocate the ietf frame and space for private data */
2796 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2797 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2798 &nesqp->ietf_frame_pbase);
2800 if (!nesqp->ietf_frame) {
2801 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2807 /* setup the MPA frame */
2808 nesqp->private_data_len = conn_param->private_data_len;
2809 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2811 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2812 conn_param->private_data_len);
2814 nesqp->ietf_frame->priv_data_len =
2815 cpu_to_be16(conn_param->private_data_len);
2816 nesqp->ietf_frame->rev = mpa_version;
2817 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2819 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2820 wqe = &nesqp->hwqp.sq_vbase[0];
2822 if (cm_id->remote_addr.sin_addr.s_addr !=
2823 cm_id->local_addr.sin_addr.s_addr) {
2824 u64temp = (unsigned long)nesqp;
2825 nesibdev = nesvnic->nesibdev;
2826 nespd = nesqp->nespd;
2827 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2828 ibphysbuf.size = conn_param->private_data_len +
2829 sizeof(struct ietf_mpa_frame);
2830 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
2831 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2833 IB_ACCESS_LOCAL_WRITE,
2836 nes_debug(NES_DBG_CM, "Unable to register memory region"
2837 "for lSMM for cm_node = %p \n",
2839 pci_free_consistent(nesdev->pcidev,
2840 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2841 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2845 ibmr->pd = &nespd->ibpd;
2846 ibmr->device = nespd->ibpd.device;
2847 nesqp->lsmm_mr = ibmr;
2849 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2850 set_wqe_64bit_value(wqe->wqe_words,
2851 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2853 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2854 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2855 NES_IWARP_SQ_WQE_WRPDU);
2856 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2857 cpu_to_le32(conn_param->private_data_len +
2858 sizeof(struct ietf_mpa_frame));
2859 set_wqe_64bit_value(wqe->wqe_words,
2860 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
2861 (u64)(unsigned long)nesqp->ietf_frame);
2862 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2863 cpu_to_le32(conn_param->private_data_len +
2864 sizeof(struct ietf_mpa_frame));
2865 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
2866 if (nesqp->sq_kmapped) {
2867 nesqp->sq_kmapped = 0;
2868 kunmap(nesqp->page);
2871 nesqp->nesqp_context->ird_ord_sizes |=
2872 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2873 NES_QPCONTEXT_ORDIRD_WRPDU);
2875 nesqp->nesqp_context->ird_ord_sizes |=
2876 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
2878 nesqp->skip_lsmm = 1;
2881 /* Cache the cm_id in the qp */
2882 nesqp->cm_id = cm_id;
2883 cm_node->cm_id = cm_id;
2885 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2886 cm_id->provider_data = nesqp;
2887 nesqp->active_conn = 0;
2889 if (cm_node->state == NES_CM_STATE_TSA)
2890 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2893 nes_cm_init_tsa_conn(nesqp, cm_node);
2895 nesqp->nesqp_context->tcpPorts[0] =
2896 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2897 nesqp->nesqp_context->tcpPorts[1] =
2898 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2900 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2901 nesqp->nesqp_context->ip0 =
2902 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2904 nesqp->nesqp_context->ip0 =
2905 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2907 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2908 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2909 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2911 nesqp->nesqp_context->arp_index_vlan |=
2912 cpu_to_le32(nes_arp_table(nesdev,
2913 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2914 NES_ARP_RESOLVE) << 16);
2916 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2917 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2919 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2921 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2922 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2923 nesqp->nesqp_context->ird_ord_sizes |=
2924 cpu_to_le32((u32)conn_param->ord);
2926 memset(&nes_quad, 0, sizeof(nes_quad));
2927 nes_quad.DstIpAdrIndex =
2928 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2929 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2930 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2932 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2933 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2934 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2936 /* Produce hash key */
2937 crc_value = get_crc_value(&nes_quad);
2938 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2939 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2940 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2942 nesqp->hte_index &= adapter->hte_index_mask;
2943 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2945 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2947 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2948 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2949 "private data length=%zu.\n", nesqp->hwqp.qp_id,
2950 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2951 ntohs(cm_id->remote_addr.sin_port),
2952 ntohl(cm_id->local_addr.sin_addr.s_addr),
2953 ntohs(cm_id->local_addr.sin_port),
2954 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2955 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2956 conn_param->private_data_len +
2957 sizeof(struct ietf_mpa_frame));
2960 /* notify OF layer that accept event was successful */
2961 cm_id->add_ref(cm_id);
2962 nes_add_ref(&nesqp->ibqp);
2964 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2965 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2966 cm_event.provider_data = (void *)nesqp;
2967 cm_event.local_addr = cm_id->local_addr;
2968 cm_event.remote_addr = cm_id->remote_addr;
2969 cm_event.private_data = NULL;
2970 cm_event.private_data_len = 0;
2971 ret = cm_id->event_handler(cm_id, &cm_event);
2972 attr.qp_state = IB_QPS_RTS;
2973 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2974 if (cm_node->loopbackpartner) {
2975 cm_node->loopbackpartner->mpa_frame_size =
2976 nesqp->private_data_len;
2977 /* copy entire MPA frame to our cm_node's frame */
2978 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2979 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2980 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2983 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2984 "ret=%d\n", __func__, __LINE__, ret);
2993 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2995 struct nes_cm_node *cm_node;
2996 struct nes_cm_node *loopback;
2998 struct nes_cm_core *cm_core;
3000 atomic_inc(&cm_rejects);
3001 cm_node = (struct nes_cm_node *) cm_id->provider_data;
3002 loopback = cm_node->loopbackpartner;
3003 cm_core = cm_node->cm_core;
3004 cm_node->cm_id = cm_id;
3005 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
3007 if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
3010 memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
3012 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3013 loopback->mpa_frame.priv_data_len = pdata_len;
3014 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
3017 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
3018 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
3021 cm_node->mpa_frame.rev = mpa_version;
3022 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
3024 return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
3030 * setup and launch cm connect node
3032 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3035 struct nes_qp *nesqp;
3036 struct nes_vnic *nesvnic;
3037 struct nes_device *nesdev;
3038 struct nes_cm_node *cm_node;
3039 struct nes_cm_info cm_info;
3042 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3045 nesqp = to_nesqp(ibqp);
3048 nesvnic = to_nesvnic(nesqp->ibqp.device);
3051 nesdev = nesvnic->nesdev;
3055 if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3058 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3059 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3060 ntohl(nesvnic->local_ipaddr),
3061 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3062 ntohs(cm_id->remote_addr.sin_port),
3063 ntohl(cm_id->local_addr.sin_addr.s_addr),
3064 ntohs(cm_id->local_addr.sin_port));
3066 atomic_inc(&cm_connects);
3067 nesqp->active_conn = 1;
3069 /* cache the cm_id in the qp */
3070 nesqp->cm_id = cm_id;
3072 cm_id->provider_data = nesqp;
3074 nesqp->private_data_len = conn_param->private_data_len;
3075 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3076 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3077 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3078 conn_param->private_data_len);
3080 if (cm_id->local_addr.sin_addr.s_addr !=
3081 cm_id->remote_addr.sin_addr.s_addr) {
3082 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3083 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3087 /* set up the connection params for the node */
3088 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3089 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3090 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3091 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3092 cm_info.cm_id = cm_id;
3093 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3095 cm_id->add_ref(cm_id);
3097 /* create a connect CM node connection */
3098 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3099 conn_param->private_data_len, (void *)conn_param->private_data,
3103 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3104 PCI_FUNC(nesdev->pcidev->devfn),
3105 NES_MANAGE_APBVT_DEL);
3107 cm_id->rem_ref(cm_id);
3111 cm_node->apbvt_set = apbvt_set;
3112 nesqp->cm_node = cm_node;
3113 cm_node->nesqp = nesqp;
3114 nes_add_ref(&nesqp->ibqp);
3123 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3125 struct nes_vnic *nesvnic;
3126 struct nes_cm_listener *cm_node;
3127 struct nes_cm_info cm_info;
3130 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3131 cm_id, ntohs(cm_id->local_addr.sin_port));
3133 nesvnic = to_nesvnic(cm_id->device);
3137 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3138 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3140 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3141 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3143 /* setup listen params in our api call struct */
3144 cm_info.loc_addr = nesvnic->local_ipaddr;
3145 cm_info.loc_port = cm_id->local_addr.sin_port;
3146 cm_info.backlog = backlog;
3147 cm_info.cm_id = cm_id;
3149 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3152 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3154 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3155 __func__, __LINE__);
3159 cm_id->provider_data = cm_node;
3161 if (!cm_node->reused_node) {
3162 err = nes_manage_apbvt(nesvnic,
3163 ntohs(cm_id->local_addr.sin_port),
3164 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3165 NES_MANAGE_APBVT_ADD);
3167 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3169 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3172 atomic_inc(&cm_listens_created);
3175 cm_id->add_ref(cm_id);
3176 cm_id->provider_data = (void *)cm_node;
3184 * nes_destroy_listen
3186 int nes_destroy_listen(struct iw_cm_id *cm_id)
3188 if (cm_id->provider_data)
3189 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3191 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3193 cm_id->rem_ref(cm_id);
3202 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3205 cm_packets_received++;
3206 if ((g_cm_core) && (g_cm_core->api)) {
3207 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3209 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3210 " cm is not setup properly.\n");
3219 * Start and init a cm core module
3221 int nes_cm_start(void)
3223 nes_debug(NES_DBG_CM, "\n");
3224 /* create the primary CM core, pass this handle to subsequent core inits */
3225 g_cm_core = nes_cm_alloc_core();
3236 * stop and dealloc all cm core instances
3238 int nes_cm_stop(void)
3240 g_cm_core->api->destroy_cm_core(g_cm_core);
3246 * cm_event_connected
3247 * handle a connected event, setup QPs and HW
3249 static void cm_event_connected(struct nes_cm_event *event)
3252 struct nes_qp *nesqp;
3253 struct nes_vnic *nesvnic;
3254 struct nes_device *nesdev;
3255 struct nes_cm_node *cm_node;
3256 struct nes_adapter *nesadapter;
3257 struct ib_qp_attr attr;
3258 struct iw_cm_id *cm_id;
3259 struct iw_cm_event cm_event;
3260 struct nes_hw_qp_wqe *wqe;
3261 struct nes_v4_quad nes_quad;
3265 /* get all our handles */
3266 cm_node = event->cm_node;
3267 cm_id = cm_node->cm_id;
3268 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3269 nesqp = (struct nes_qp *)cm_id->provider_data;
3270 nesvnic = to_nesvnic(nesqp->ibqp.device);
3271 nesdev = nesvnic->nesdev;
3272 nesadapter = nesdev->nesadapter;
3274 if (nesqp->destroyed) {
3277 atomic_inc(&cm_connecteds);
3278 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3279 " local port 0x%04X. jiffies = %lu.\n",
3281 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3282 ntohs(cm_id->remote_addr.sin_port),
3283 ntohs(cm_id->local_addr.sin_port),
3286 nes_cm_init_tsa_conn(nesqp, cm_node);
3288 /* set the QP tsa context */
3289 nesqp->nesqp_context->tcpPorts[0] =
3290 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3291 nesqp->nesqp_context->tcpPorts[1] =
3292 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3293 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3294 nesqp->nesqp_context->ip0 =
3295 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3297 nesqp->nesqp_context->ip0 =
3298 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3300 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3301 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3302 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3303 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3304 nes_arp_table(nesdev,
3305 le32_to_cpu(nesqp->nesqp_context->ip0),
3306 NULL, NES_ARP_RESOLVE) << 16);
3307 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3308 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3309 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3310 nesqp->nesqp_context->ird_ord_sizes |=
3311 cpu_to_le32((u32)1 <<
3312 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3314 /* Adjust tail for not having a LSMM */
3315 nesqp->hwqp.sq_tail = 1;
3317 #if defined(NES_SEND_FIRST_WRITE)
3318 if (cm_node->send_write0) {
3319 nes_debug(NES_DBG_CM, "Sending first write.\n");
3320 wqe = &nesqp->hwqp.sq_vbase[0];
3321 u64temp = (unsigned long)nesqp;
3322 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3323 set_wqe_64bit_value(wqe->wqe_words,
3324 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3325 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3326 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3327 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3328 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3329 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3330 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3331 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3333 if (nesqp->sq_kmapped) {
3334 nesqp->sq_kmapped = 0;
3335 kunmap(nesqp->page);
3338 /* use the reserved spot on the WQ for the extra first WQE */
3339 nesqp->nesqp_context->ird_ord_sizes &=
3340 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3341 NES_QPCONTEXT_ORDIRD_WRPDU |
3342 NES_QPCONTEXT_ORDIRD_ALSMM));
3343 nesqp->skip_lsmm = 1;
3344 nesqp->hwqp.sq_tail = 0;
3345 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3346 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3350 memset(&nes_quad, 0, sizeof(nes_quad));
3352 nes_quad.DstIpAdrIndex =
3353 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3354 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3355 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3357 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3358 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3359 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3361 /* Produce hash key */
3362 crc_value = get_crc_value(&nes_quad);
3363 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3364 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3365 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3367 nesqp->hte_index &= nesadapter->hte_index_mask;
3368 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3370 nesqp->ietf_frame = &cm_node->mpa_frame;
3371 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3372 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3374 /* notify OF layer we successfully created the requested connection */
3375 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3376 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3377 cm_event.provider_data = cm_id->provider_data;
3378 cm_event.local_addr.sin_family = AF_INET;
3379 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3380 cm_event.remote_addr = cm_id->remote_addr;
3382 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3383 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3385 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3386 ret = cm_id->event_handler(cm_id, &cm_event);
3387 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3390 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3391 "ret=%d\n", __func__, __LINE__, ret);
3392 attr.qp_state = IB_QPS_RTS;
3393 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3395 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3396 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3403 * cm_event_connect_error
3405 static void cm_event_connect_error(struct nes_cm_event *event)
3407 struct nes_qp *nesqp;
3408 struct iw_cm_id *cm_id;
3409 struct iw_cm_event cm_event;
3410 /* struct nes_cm_info cm_info; */
3413 if (!event->cm_node)
3416 cm_id = event->cm_node->cm_id;
3421 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3422 nesqp = cm_id->provider_data;
3428 /* notify OF layer about this connection error event */
3429 /* cm_id->rem_ref(cm_id); */
3430 nesqp->cm_id = NULL;
3431 cm_id->provider_data = NULL;
3432 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3433 cm_event.status = -ECONNRESET;
3434 cm_event.provider_data = cm_id->provider_data;
3435 cm_event.local_addr = cm_id->local_addr;
3436 cm_event.remote_addr = cm_id->remote_addr;
3437 cm_event.private_data = NULL;
3438 cm_event.private_data_len = 0;
3440 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3441 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3442 cm_event.remote_addr.sin_addr.s_addr);
3444 ret = cm_id->event_handler(cm_id, &cm_event);
3445 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3447 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3448 "ret=%d\n", __func__, __LINE__, ret);
3449 cm_id->rem_ref(cm_id);
3451 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3459 static void cm_event_reset(struct nes_cm_event *event)
3461 struct nes_qp *nesqp;
3462 struct iw_cm_id *cm_id;
3463 struct iw_cm_event cm_event;
3464 /* struct nes_cm_info cm_info; */
3467 if (!event->cm_node)
3470 if (!event->cm_node->cm_id)
3473 cm_id = event->cm_node->cm_id;
3475 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3476 nesqp = cm_id->provider_data;
3480 nesqp->cm_id = NULL;
3481 /* cm_id->provider_data = NULL; */
3482 cm_event.event = IW_CM_EVENT_DISCONNECT;
3483 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3484 cm_event.provider_data = cm_id->provider_data;
3485 cm_event.local_addr = cm_id->local_addr;
3486 cm_event.remote_addr = cm_id->remote_addr;
3487 cm_event.private_data = NULL;
3488 cm_event.private_data_len = 0;
3490 cm_id->add_ref(cm_id);
3491 ret = cm_id->event_handler(cm_id, &cm_event);
3492 atomic_inc(&cm_closes);
3493 cm_event.event = IW_CM_EVENT_CLOSE;
3494 cm_event.status = IW_CM_EVENT_STATUS_OK;
3495 cm_event.provider_data = cm_id->provider_data;
3496 cm_event.local_addr = cm_id->local_addr;
3497 cm_event.remote_addr = cm_id->remote_addr;
3498 cm_event.private_data = NULL;
3499 cm_event.private_data_len = 0;
3500 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3501 ret = cm_id->event_handler(cm_id, &cm_event);
3503 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3506 /* notify OF layer about this connection error event */
3507 cm_id->rem_ref(cm_id);
3516 static void cm_event_mpa_req(struct nes_cm_event *event)
3518 struct iw_cm_id *cm_id;
3519 struct iw_cm_event cm_event;
3521 struct nes_cm_node *cm_node;
3523 cm_node = event->cm_node;
3526 cm_id = cm_node->cm_id;
3528 atomic_inc(&cm_connect_reqs);
3529 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3530 cm_node, cm_id, jiffies);
3532 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3533 cm_event.status = IW_CM_EVENT_STATUS_OK;
3534 cm_event.provider_data = (void *)cm_node;
3536 cm_event.local_addr.sin_family = AF_INET;
3537 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3538 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3540 cm_event.remote_addr.sin_family = AF_INET;
3541 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3542 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3543 cm_event.private_data = cm_node->mpa_frame_buf;
3544 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3546 ret = cm_id->event_handler(cm_id, &cm_event);
3548 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3549 __func__, __LINE__, ret);
3554 static void cm_event_mpa_reject(struct nes_cm_event *event)
3556 struct iw_cm_id *cm_id;
3557 struct iw_cm_event cm_event;
3558 struct nes_cm_node *cm_node;
3561 cm_node = event->cm_node;
3564 cm_id = cm_node->cm_id;
3566 atomic_inc(&cm_connect_reqs);
3567 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3568 cm_node, cm_id, jiffies);
3570 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3571 cm_event.status = -ECONNREFUSED;
3572 cm_event.provider_data = cm_id->provider_data;
3574 cm_event.local_addr.sin_family = AF_INET;
3575 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3576 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3578 cm_event.remote_addr.sin_family = AF_INET;
3579 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3580 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3582 cm_event.private_data = cm_node->mpa_frame_buf;
3583 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3585 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3586 "remove_addr=%08x\n",
3587 cm_event.local_addr.sin_addr.s_addr,
3588 cm_event.remote_addr.sin_addr.s_addr);
3590 ret = cm_id->event_handler(cm_id, &cm_event);
3592 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3593 __func__, __LINE__, ret);
3599 static void nes_cm_event_handler(struct work_struct *);
3603 * post an event to the cm event handler
3605 static int nes_cm_post_event(struct nes_cm_event *event)
3607 atomic_inc(&event->cm_node->cm_core->events_posted);
3608 add_ref_cm_node(event->cm_node);
3609 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3610 INIT_WORK(&event->event_work, nes_cm_event_handler);
3611 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3612 event->cm_node, event);
3614 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3616 nes_debug(NES_DBG_CM, "Exit\n");
3622 * nes_cm_event_handler
3623 * worker function to handle cm events
3624 * will free instance of nes_cm_event
3626 static void nes_cm_event_handler(struct work_struct *work)
3628 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3630 struct nes_cm_core *cm_core;
3632 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3635 cm_core = event->cm_node->cm_core;
3636 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3637 event, event->type, atomic_read(&cm_core->events_posted));
3639 switch (event->type) {
3640 case NES_CM_EVENT_MPA_REQ:
3641 cm_event_mpa_req(event);
3642 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3645 case NES_CM_EVENT_RESET:
3646 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3648 cm_event_reset(event);
3650 case NES_CM_EVENT_CONNECTED:
3651 if ((!event->cm_node->cm_id) ||
3652 (event->cm_node->state != NES_CM_STATE_TSA))
3654 cm_event_connected(event);
3655 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3657 case NES_CM_EVENT_MPA_REJECT:
3658 if ((!event->cm_node->cm_id) ||
3659 (event->cm_node->state == NES_CM_STATE_TSA))
3661 cm_event_mpa_reject(event);
3662 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3665 case NES_CM_EVENT_ABORTED:
3666 if ((!event->cm_node->cm_id) ||
3667 (event->cm_node->state == NES_CM_STATE_TSA))
3669 cm_event_connect_error(event);
3670 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3672 case NES_CM_EVENT_DROPPED_PKT:
3673 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3676 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3680 atomic_dec(&cm_core->events_posted);
3681 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3682 rem_ref_cm_node(cm_core, event->cm_node);