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>
57 #include <net/neighbour.h>
58 #include <net/route.h>
59 #include <net/ip_fib.h>
65 u32 cm_packets_bounced;
66 u32 cm_packets_dropped;
67 u32 cm_packets_retrans;
68 u32 cm_packets_created;
69 u32 cm_packets_received;
70 u32 cm_listens_created;
71 u32 cm_listens_destroyed;
73 atomic_t cm_loopbacks;
74 atomic_t cm_nodes_created;
75 atomic_t cm_nodes_destroyed;
76 atomic_t cm_accel_dropped_pkts;
77 atomic_t cm_resets_recvd;
79 static inline int mini_cm_accelerated(struct nes_cm_core *,
80 struct nes_cm_node *);
81 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
82 struct nes_vnic *, struct nes_cm_info *);
83 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
84 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
85 struct nes_vnic *, u16, void *, struct nes_cm_info *);
86 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
87 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
88 struct nes_cm_node *);
89 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
90 struct nes_cm_node *);
91 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
93 static int mini_cm_dealloc_core(struct nes_cm_core *);
94 static int mini_cm_get(struct nes_cm_core *);
95 static int mini_cm_set(struct nes_cm_core *, u32, u32);
97 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
98 void *, u32, void *, u32, u8);
99 static int add_ref_cm_node(struct nes_cm_node *);
100 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
102 static int nes_cm_disconn_true(struct nes_qp *);
103 static int nes_cm_post_event(struct nes_cm_event *event);
104 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
105 static void nes_disconnect_worker(struct work_struct *work);
107 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
108 static int send_mpa_reject(struct nes_cm_node *);
109 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
110 static int send_reset(struct nes_cm_node *, struct sk_buff *);
111 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
112 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
113 static void process_packet(struct nes_cm_node *, struct sk_buff *,
114 struct nes_cm_core *);
116 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
117 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
118 static void cleanup_retrans_entry(struct nes_cm_node *);
119 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
120 static void free_retrans_entry(struct nes_cm_node *cm_node);
121 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
122 struct sk_buff *skb, int optionsize, int passive);
124 /* CM event handler functions */
125 static void cm_event_connected(struct nes_cm_event *);
126 static void cm_event_connect_error(struct nes_cm_event *);
127 static void cm_event_reset(struct nes_cm_event *);
128 static void cm_event_mpa_req(struct nes_cm_event *);
129 static void cm_event_mpa_reject(struct nes_cm_event *);
130 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
132 static void print_core(struct nes_cm_core *core);
134 /* External CM API Interface */
135 /* instance of function pointers for client API */
136 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
137 static struct nes_cm_ops nes_cm_api = {
146 mini_cm_dealloc_core,
151 static struct nes_cm_core *g_cm_core;
153 atomic_t cm_connects;
155 atomic_t cm_disconnects;
157 atomic_t cm_connecteds;
158 atomic_t cm_connect_reqs;
165 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
166 enum nes_cm_event_type type)
168 struct nes_cm_event *event;
173 /* allocate an empty event */
174 event = kzalloc(sizeof(*event), GFP_ATOMIC);
180 event->cm_node = cm_node;
181 event->cm_info.rem_addr = cm_node->rem_addr;
182 event->cm_info.loc_addr = cm_node->loc_addr;
183 event->cm_info.rem_port = cm_node->rem_port;
184 event->cm_info.loc_port = cm_node->loc_port;
185 event->cm_info.cm_id = cm_node->cm_id;
187 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
188 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
189 cm_node, event, type, event->cm_info.loc_addr,
190 event->cm_info.loc_port, event->cm_info.rem_addr,
191 event->cm_info.rem_port);
193 nes_cm_post_event(event);
201 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
204 nes_debug(NES_DBG_CM, "skb set to NULL\n");
208 /* send an MPA Request frame */
209 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
210 cm_node->mpa_frame_size, SET_ACK);
212 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
217 static int send_mpa_reject(struct nes_cm_node *cm_node)
219 struct sk_buff *skb = NULL;
221 skb = dev_alloc_skb(MAX_CM_BUFFER);
223 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
227 /* send an MPA reject frame */
228 form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
229 cm_node->mpa_frame_size, SET_ACK | SET_FIN);
231 cm_node->state = NES_CM_STATE_FIN_WAIT1;
232 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
237 * recv_mpa - process a received TCP pkt, we are expecting an
240 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
243 struct ietf_mpa_frame *mpa_frame;
245 *type = NES_MPA_REQUEST_ACCEPT;
247 /* assume req frame is in tcp data payload */
248 if (len < sizeof(struct ietf_mpa_frame)) {
249 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
253 mpa_frame = (struct ietf_mpa_frame *)buffer;
254 cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
255 /* make sure mpa private data len is less than 512 bytes */
256 if (cm_node->mpa_frame_size > IETF_MAX_PRIV_DATA_LEN) {
257 nes_debug(NES_DBG_CM, "The received Length of Private"
258 " Data field exceeds 512 octets\n");
262 * make sure MPA receiver interoperate with the
263 * received MPA version and MPA key information
266 if (mpa_frame->rev != mpa_version) {
267 nes_debug(NES_DBG_CM, "The received mpa version"
268 " can not be interoperated\n");
271 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
272 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
273 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
277 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
278 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
283 if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
284 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
285 " complete (%x + %x != %x)\n",
286 cm_node->mpa_frame_size,
287 (u32)sizeof(struct ietf_mpa_frame), len);
290 /* make sure it does not exceed the max size */
291 if (len > MAX_CM_BUFFER) {
292 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
293 " (%x + %x != %x)\n",
294 cm_node->mpa_frame_size,
295 (u32)sizeof(struct ietf_mpa_frame), len);
299 /* copy entire MPA frame to our cm_node's frame */
300 memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
301 cm_node->mpa_frame_size);
303 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
304 *type = NES_MPA_REQUEST_REJECT;
310 * form_cm_frame - get a free packet and build empty frame Use
311 * node info to build.
313 static void form_cm_frame(struct sk_buff *skb,
314 struct nes_cm_node *cm_node, void *options, u32 optionsize,
315 void *data, u32 datasize, u8 flags)
321 u16 packetsize = sizeof(*iph);
323 packetsize += sizeof(*tcph);
324 packetsize += optionsize + datasize;
326 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
329 buf = skb_put(skb, packetsize + ETH_HLEN);
331 ethh = (struct ethhdr *) buf;
334 iph = (struct iphdr *)buf;
336 tcph = (struct tcphdr *)buf;
337 skb_reset_mac_header(skb);
338 skb_set_network_header(skb, ETH_HLEN);
339 skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
340 buf += sizeof(*tcph);
342 skb->ip_summed = CHECKSUM_PARTIAL;
343 skb->protocol = htons(0x800);
345 skb->mac_len = ETH_HLEN;
347 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
348 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
349 ethh->h_proto = htons(0x0800);
351 iph->version = IPVERSION;
352 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
354 iph->tot_len = htons(packetsize);
355 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
357 iph->frag_off = htons(0x4000);
359 iph->protocol = 0x06; /* IPPROTO_TCP */
361 iph->saddr = htonl(cm_node->loc_addr);
362 iph->daddr = htonl(cm_node->rem_addr);
364 tcph->source = htons(cm_node->loc_port);
365 tcph->dest = htons(cm_node->rem_port);
366 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
368 if (flags & SET_ACK) {
369 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
370 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
375 if (flags & SET_SYN) {
376 cm_node->tcp_cntxt.loc_seq_num++;
379 cm_node->tcp_cntxt.loc_seq_num += datasize;
381 if (flags & SET_FIN) {
382 cm_node->tcp_cntxt.loc_seq_num++;
389 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
390 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
393 memcpy(buf, options, optionsize);
396 memcpy(buf, data, datasize);
398 skb_shinfo(skb)->nr_frags = 0;
399 cm_packets_created++;
405 * print_core - dump a cm core
407 static void print_core(struct nes_cm_core *core)
409 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
410 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
413 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
415 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
417 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
418 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
420 nes_debug(NES_DBG_CM, "core : %p \n", core);
422 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
428 * note - cm_node needs to be protected before calling this. Encase in:
429 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
431 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
432 enum nes_timer_type type, int send_retrans,
433 int close_when_complete)
436 struct nes_cm_core *cm_core = cm_node->cm_core;
437 struct nes_timer_entry *new_send;
441 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
445 /* new_send->timetosend = currenttime */
446 new_send->retrycount = NES_DEFAULT_RETRYS;
447 new_send->retranscount = NES_DEFAULT_RETRANS;
449 new_send->timetosend = jiffies;
450 new_send->type = type;
451 new_send->netdev = cm_node->netdev;
452 new_send->send_retrans = send_retrans;
453 new_send->close_when_complete = close_when_complete;
455 if (type == NES_TIMER_TYPE_CLOSE) {
456 new_send->timetosend += (HZ/10);
457 if (cm_node->recv_entry) {
462 cm_node->recv_entry = new_send;
465 if (type == NES_TIMER_TYPE_SEND) {
466 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
467 atomic_inc(&new_send->skb->users);
468 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
469 cm_node->send_entry = new_send;
470 add_ref_cm_node(cm_node);
471 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
472 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
474 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
475 if (ret != NETDEV_TX_OK) {
476 nes_debug(NES_DBG_CM, "Error sending packet %p "
477 "(jiffies = %lu)\n", new_send, jiffies);
478 new_send->timetosend = jiffies;
483 cleanup_retrans_entry(cm_node);
484 if (close_when_complete)
485 rem_ref_cm_node(cm_core, cm_node);
491 was_timer_set = timer_pending(&cm_core->tcp_timer);
493 if (!was_timer_set) {
494 cm_core->tcp_timer.expires = new_send->timetosend;
495 add_timer(&cm_core->tcp_timer);
501 static void nes_retrans_expired(struct nes_cm_node *cm_node)
503 struct iw_cm_id *cm_id = cm_node->cm_id;
504 switch (cm_node->state) {
505 case NES_CM_STATE_SYN_RCVD:
506 case NES_CM_STATE_CLOSING:
507 rem_ref_cm_node(cm_node->cm_core, cm_node);
509 case NES_CM_STATE_LAST_ACK:
510 case NES_CM_STATE_FIN_WAIT1:
512 cm_id->rem_ref(cm_id);
513 cm_node->state = NES_CM_STATE_CLOSED;
514 send_reset(cm_node, NULL);
517 add_ref_cm_node(cm_node);
518 send_reset(cm_node, NULL);
519 create_event(cm_node, NES_CM_EVENT_ABORTED);
523 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
525 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
526 struct iw_cm_id *cm_id = cm_node->cm_id;
527 struct nes_qp *nesqp;
528 unsigned long qplockflags;
532 nesqp = (struct nes_qp *)recv_entry->skb;
534 spin_lock_irqsave(&nesqp->lock, qplockflags);
536 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
537 "refcount = %d: HIT A "
538 "NES_TIMER_TYPE_CLOSE with something "
539 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
540 atomic_read(&nesqp->refcount));
541 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
542 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
543 nesqp->ibqp_state = IB_QPS_ERR;
544 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
545 nes_cm_disconn(nesqp);
547 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
548 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
549 "refcount = %d: HIT A "
550 "NES_TIMER_TYPE_CLOSE with nothing "
551 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
552 atomic_read(&nesqp->refcount));
554 } else if (rem_node) {
555 /* TIME_WAIT state */
556 rem_ref_cm_node(cm_node->cm_core, cm_node);
559 cm_id->rem_ref(cm_id);
561 cm_node->recv_entry = NULL;
567 static void nes_cm_timer_tick(unsigned long pass)
570 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
571 struct nes_cm_node *cm_node;
572 struct nes_timer_entry *send_entry, *recv_entry;
573 struct list_head *list_core_temp;
574 struct list_head *list_node;
575 struct nes_cm_core *cm_core = g_cm_core;
577 unsigned long timetosend;
578 int ret = NETDEV_TX_OK;
580 struct list_head timer_list;
581 INIT_LIST_HEAD(&timer_list);
582 spin_lock_irqsave(&cm_core->ht_lock, flags);
584 list_for_each_safe(list_node, list_core_temp,
585 &cm_core->connected_nodes) {
586 cm_node = container_of(list_node, struct nes_cm_node, list);
587 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
588 add_ref_cm_node(cm_node);
589 list_add(&cm_node->timer_entry, &timer_list);
592 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
594 list_for_each_safe(list_node, list_core_temp, &timer_list) {
595 cm_node = container_of(list_node, struct nes_cm_node,
597 recv_entry = cm_node->recv_entry;
600 if (time_after(recv_entry->timetosend, jiffies)) {
601 if (nexttimeout > recv_entry->timetosend ||
603 nexttimeout = recv_entry->timetosend;
607 handle_recv_entry(cm_node, 1);
610 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
612 send_entry = cm_node->send_entry;
615 if (time_after(send_entry->timetosend, jiffies)) {
616 if (cm_node->state != NES_CM_STATE_TSA) {
618 send_entry->timetosend) ||
621 send_entry->timetosend;
625 free_retrans_entry(cm_node);
630 if ((cm_node->state == NES_CM_STATE_TSA) ||
631 (cm_node->state == NES_CM_STATE_CLOSED)) {
632 free_retrans_entry(cm_node);
636 if (!send_entry->retranscount ||
637 !send_entry->retrycount) {
638 cm_packets_dropped++;
639 free_retrans_entry(cm_node);
641 spin_unlock_irqrestore(
642 &cm_node->retrans_list_lock, flags);
643 nes_retrans_expired(cm_node);
644 cm_node->state = NES_CM_STATE_CLOSED;
645 spin_lock_irqsave(&cm_node->retrans_list_lock,
649 atomic_inc(&send_entry->skb->users);
650 cm_packets_retrans++;
651 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
652 "for node %p, jiffies = %lu, time to send = "
653 "%lu, retranscount = %u, send_entry->seq_num = "
654 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
655 "0x%08X\n", send_entry, cm_node, jiffies,
656 send_entry->timetosend,
657 send_entry->retranscount,
659 cm_node->tcp_cntxt.rem_ack_num);
661 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
663 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
664 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
665 if (ret != NETDEV_TX_OK) {
666 nes_debug(NES_DBG_CM, "rexmit failed for "
667 "node=%p\n", cm_node);
668 cm_packets_bounced++;
669 send_entry->retrycount--;
670 nexttimeout = jiffies + NES_SHORT_TIME;
676 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
677 "%u, retry count = %u.\n",
678 send_entry->retranscount,
679 send_entry->retrycount);
680 if (send_entry->send_retrans) {
681 send_entry->retranscount--;
682 timetosend = (NES_RETRY_TIMEOUT <<
683 (NES_DEFAULT_RETRANS - send_entry->retranscount));
685 send_entry->timetosend = jiffies +
686 min(timetosend, NES_MAX_TIMEOUT);
687 if (nexttimeout > send_entry->timetosend ||
689 nexttimeout = send_entry->timetosend;
693 int close_when_complete;
694 close_when_complete =
695 send_entry->close_when_complete;
696 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
697 cm_node, cm_node->state);
698 free_retrans_entry(cm_node);
699 if (close_when_complete)
700 rem_ref_cm_node(cm_node->cm_core,
705 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
706 rem_ref_cm_node(cm_node->cm_core, cm_node);
710 if (!timer_pending(&cm_core->tcp_timer)) {
711 cm_core->tcp_timer.expires = nexttimeout;
712 add_timer(&cm_core->tcp_timer);
721 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
726 char optionsbuffer[sizeof(struct option_mss) +
727 sizeof(struct option_windowscale) + sizeof(struct option_base) +
728 TCP_OPTIONS_PADDING];
731 /* Sending MSS option */
732 union all_known_options *options;
737 options = (union all_known_options *)&optionsbuffer[optionssize];
738 options->as_mss.optionnum = OPTION_NUMBER_MSS;
739 options->as_mss.length = sizeof(struct option_mss);
740 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
741 optionssize += sizeof(struct option_mss);
743 options = (union all_known_options *)&optionsbuffer[optionssize];
744 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
745 options->as_windowscale.length = sizeof(struct option_windowscale);
746 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
747 optionssize += sizeof(struct option_windowscale);
749 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
750 options = (union all_known_options *)&optionsbuffer[optionssize];
751 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
752 options->as_base.length = sizeof(struct option_base);
753 optionssize += sizeof(struct option_base);
754 /* we need the size to be a multiple of 4 */
755 options = (union all_known_options *)&optionsbuffer[optionssize];
758 options = (union all_known_options *)&optionsbuffer[optionssize];
763 options = (union all_known_options *)&optionsbuffer[optionssize];
764 options->as_end = OPTION_NUMBER_END;
768 skb = dev_alloc_skb(MAX_CM_BUFFER);
770 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
777 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
778 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
787 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
790 int flags = SET_RST | SET_ACK;
793 skb = dev_alloc_skb(MAX_CM_BUFFER);
795 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
799 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
800 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
809 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
814 skb = dev_alloc_skb(MAX_CM_BUFFER);
817 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
821 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
822 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
831 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
835 /* if we didn't get a frame get one */
837 skb = dev_alloc_skb(MAX_CM_BUFFER);
840 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
844 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
845 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
852 * find_node - find a cm node that matches the reference cm node
854 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
855 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
858 struct list_head *hte;
859 struct nes_cm_node *cm_node;
861 /* get a handle on the hte */
862 hte = &cm_core->connected_nodes;
864 /* walk list and find cm_node associated with this session ID */
865 spin_lock_irqsave(&cm_core->ht_lock, flags);
866 list_for_each_entry(cm_node, hte, list) {
867 /* compare quad, return node handle if a match */
868 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
869 cm_node->loc_addr, cm_node->loc_port,
871 cm_node->rem_addr, cm_node->rem_port,
873 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
874 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
875 add_ref_cm_node(cm_node);
876 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
880 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
888 * find_listener - find a cm node listening on this addr-port pair
890 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
891 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
894 struct nes_cm_listener *listen_node;
896 /* walk list and find cm_node associated with this session ID */
897 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
898 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
899 /* compare node pair, return node handle if a match */
900 if (((listen_node->loc_addr == dst_addr) ||
901 listen_node->loc_addr == 0x00000000) &&
902 (listen_node->loc_port == dst_port) &&
903 (listener_state & listen_node->listener_state)) {
904 atomic_inc(&listen_node->ref_count);
905 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
909 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
917 * add_hte_node - add a cm node to the hash table
919 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
922 struct list_head *hte;
924 if (!cm_node || !cm_core)
927 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
930 spin_lock_irqsave(&cm_core->ht_lock, flags);
932 /* get a handle on the hash table element (list head for this slot) */
933 hte = &cm_core->connected_nodes;
934 list_add_tail(&cm_node->list, hte);
935 atomic_inc(&cm_core->ht_node_cnt);
937 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
944 * mini_cm_dec_refcnt_listen
946 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
947 struct nes_cm_listener *listener, int free_hanging_nodes)
952 struct list_head *list_pos = NULL;
953 struct list_head *list_temp = NULL;
954 struct nes_cm_node *cm_node = NULL;
955 struct list_head reset_list;
957 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
958 "refcnt=%d\n", listener, free_hanging_nodes,
959 atomic_read(&listener->ref_count));
960 /* free non-accelerated child nodes for this listener */
961 INIT_LIST_HEAD(&reset_list);
962 if (free_hanging_nodes) {
963 spin_lock_irqsave(&cm_core->ht_lock, flags);
964 list_for_each_safe(list_pos, list_temp,
965 &g_cm_core->connected_nodes) {
966 cm_node = container_of(list_pos, struct nes_cm_node,
968 if ((cm_node->listener == listener) &&
969 (!cm_node->accelerated)) {
970 add_ref_cm_node(cm_node);
971 list_add(&cm_node->reset_entry, &reset_list);
974 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
977 list_for_each_safe(list_pos, list_temp, &reset_list) {
978 cm_node = container_of(list_pos, struct nes_cm_node,
981 struct nes_cm_node *loopback = cm_node->loopbackpartner;
982 enum nes_cm_node_state old_state;
983 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
984 rem_ref_cm_node(cm_node->cm_core, cm_node);
987 cleanup_retrans_entry(cm_node);
988 err = send_reset(cm_node, NULL);
994 old_state = cm_node->state;
995 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
996 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1002 struct nes_cm_event event;
1004 event.cm_node = loopback;
1005 event.cm_info.rem_addr =
1007 event.cm_info.loc_addr =
1009 event.cm_info.rem_port =
1011 event.cm_info.loc_port =
1013 event.cm_info.cm_id = loopback->cm_id;
1014 cm_event_connect_error(&event);
1015 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1016 loopback->state = NES_CM_STATE_CLOSED;
1018 rem_ref_cm_node(cm_node->cm_core,
1026 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1027 if (!atomic_dec_return(&listener->ref_count)) {
1028 list_del(&listener->list);
1030 /* decrement our listen node count */
1031 atomic_dec(&cm_core->listen_node_cnt);
1033 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1035 if (listener->nesvnic) {
1036 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1037 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1040 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1045 cm_listens_destroyed++;
1047 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1050 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1051 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1052 " with non-zero pending accepts=%u\n",
1053 listener, atomic_read(&listener->pend_accepts_cnt));
1061 * mini_cm_del_listen
1063 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1064 struct nes_cm_listener *listener)
1066 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1067 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1068 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1073 * mini_cm_accelerated
1075 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1076 struct nes_cm_node *cm_node)
1079 cm_node->accelerated = 1;
1081 if (cm_node->accept_pend) {
1082 BUG_ON(!cm_node->listener);
1083 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1084 cm_node->accept_pend = 0;
1085 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1088 was_timer_set = timer_pending(&cm_core->tcp_timer);
1089 if (!was_timer_set) {
1090 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1091 add_timer(&cm_core->tcp_timer);
1099 * nes_addr_resolve_neigh
1101 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
1105 struct neighbour *neigh;
1108 memset(&fl, 0, sizeof fl);
1109 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1110 if (ip_route_output_key(&init_net, &rt, &fl)) {
1111 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1116 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1118 if (neigh->nud_state & NUD_VALID) {
1119 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1120 " is %pM, Gateway is 0x%08X \n", dst_ip,
1121 neigh->ha, ntohl(rt->rt_gateway));
1122 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1123 dst_ip, NES_ARP_ADD);
1124 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1127 neigh_release(neigh);
1130 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1131 neigh_event_send(rt->u.dst.neighbour, NULL);
1139 * make_cm_node - create a new instance of a cm node
1141 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1142 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1143 struct nes_cm_listener *listener)
1145 struct nes_cm_node *cm_node;
1148 struct nes_device *nesdev;
1149 struct nes_adapter *nesadapter;
1151 /* create an hte and cm_node for this instance */
1152 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1156 /* set our node specific transport info */
1157 cm_node->loc_addr = cm_info->loc_addr;
1158 cm_node->rem_addr = cm_info->rem_addr;
1159 cm_node->loc_port = cm_info->loc_port;
1160 cm_node->rem_port = cm_info->rem_port;
1161 cm_node->send_write0 = send_first;
1162 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1163 &cm_node->loc_addr, cm_node->loc_port,
1164 &cm_node->rem_addr, cm_node->rem_port);
1165 cm_node->listener = listener;
1166 cm_node->netdev = nesvnic->netdev;
1167 cm_node->cm_id = cm_info->cm_id;
1168 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1170 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1173 spin_lock_init(&cm_node->retrans_list_lock);
1175 cm_node->loopbackpartner = NULL;
1176 atomic_set(&cm_node->ref_count, 1);
1177 /* associate our parent CM core */
1178 cm_node->cm_core = cm_core;
1179 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1180 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1181 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1182 NES_CM_DEFAULT_RCV_WND_SCALE;
1183 ts = current_kernel_time();
1184 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1185 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1186 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1187 cm_node->tcp_cntxt.rcv_nxt = 0;
1188 /* get a unique session ID , add thread_id to an upcounter to handle race */
1189 atomic_inc(&cm_core->node_cnt);
1190 cm_node->conn_type = cm_info->conn_type;
1191 cm_node->apbvt_set = 0;
1192 cm_node->accept_pend = 0;
1194 cm_node->nesvnic = nesvnic;
1195 /* get some device handles, for arp lookup */
1196 nesdev = nesvnic->nesdev;
1197 nesadapter = nesdev->nesadapter;
1199 cm_node->loopbackpartner = NULL;
1200 /* get the mac addr for the remote node */
1201 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1202 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1204 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1206 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1213 /* copy the mac addr to node context */
1214 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1215 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1218 add_hte_node(cm_core, cm_node);
1219 atomic_inc(&cm_nodes_created);
1226 * add_ref_cm_node - destroy an instance of a cm node
1228 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1230 atomic_inc(&cm_node->ref_count);
1236 * rem_ref_cm_node - destroy an instance of a cm node
1238 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1239 struct nes_cm_node *cm_node)
1241 unsigned long flags;
1242 struct nes_qp *nesqp;
1247 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1248 if (atomic_dec_return(&cm_node->ref_count)) {
1249 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1252 list_del(&cm_node->list);
1253 atomic_dec(&cm_core->ht_node_cnt);
1254 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1256 /* if the node is destroyed before connection was accelerated */
1257 if (!cm_node->accelerated && cm_node->accept_pend) {
1258 BUG_ON(!cm_node->listener);
1259 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1260 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1262 WARN_ON(cm_node->send_entry);
1263 if (cm_node->recv_entry)
1264 handle_recv_entry(cm_node, 0);
1265 if (cm_node->listener) {
1266 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1268 if (cm_node->apbvt_set && cm_node->nesvnic) {
1269 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1271 cm_node->nesvnic->nesdev->pcidev->devfn),
1272 NES_MANAGE_APBVT_DEL);
1276 atomic_dec(&cm_core->node_cnt);
1277 atomic_inc(&cm_nodes_destroyed);
1278 nesqp = cm_node->nesqp;
1280 nesqp->cm_node = NULL;
1281 nes_rem_ref(&nesqp->ibqp);
1282 cm_node->nesqp = NULL;
1292 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1293 u32 optionsize, u32 syn_packet)
1297 union all_known_options *all_options;
1298 char got_mss_option = 0;
1300 while (offset < optionsize) {
1301 all_options = (union all_known_options *)(optionsloc + offset);
1302 switch (all_options->as_base.optionnum) {
1303 case OPTION_NUMBER_END:
1304 offset = optionsize;
1306 case OPTION_NUMBER_NONE:
1309 case OPTION_NUMBER_MSS:
1310 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1311 "Size: %d\n", __func__,
1312 all_options->as_mss.length, offset, optionsize);
1314 if (all_options->as_mss.length != 4) {
1317 tmp = ntohs(all_options->as_mss.mss);
1318 if (tmp > 0 && tmp <
1319 cm_node->tcp_cntxt.mss)
1320 cm_node->tcp_cntxt.mss = tmp;
1323 case OPTION_NUMBER_WINDOW_SCALE:
1324 cm_node->tcp_cntxt.snd_wscale =
1325 all_options->as_windowscale.shiftcount;
1327 case OPTION_NUMBER_WRITE0:
1328 cm_node->send_write0 = 1;
1331 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1332 all_options->as_base.optionnum);
1335 offset += all_options->as_base.length;
1337 if ((!got_mss_option) && (syn_packet))
1338 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1342 static void drop_packet(struct sk_buff *skb)
1344 atomic_inc(&cm_accel_dropped_pkts);
1345 dev_kfree_skb_any(skb);
1348 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1350 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1351 "refcnt=%d\n", cm_node, cm_node->state,
1352 atomic_read(&cm_node->ref_count));
1353 switch (cm_node->state) {
1354 case NES_CM_STATE_SYN_RCVD:
1355 case NES_CM_STATE_SYN_SENT:
1356 case NES_CM_STATE_ESTABLISHED:
1357 case NES_CM_STATE_MPAREQ_SENT:
1358 case NES_CM_STATE_MPAREJ_RCVD:
1359 cm_node->tcp_cntxt.rcv_nxt++;
1360 cleanup_retrans_entry(cm_node);
1361 cm_node->state = NES_CM_STATE_LAST_ACK;
1362 send_fin(cm_node, NULL);
1364 case NES_CM_STATE_FIN_WAIT1:
1365 cm_node->tcp_cntxt.rcv_nxt++;
1366 cleanup_retrans_entry(cm_node);
1367 cm_node->state = NES_CM_STATE_CLOSING;
1368 send_ack(cm_node, NULL);
1369 /* Wait for ACK as this is simultanous close..
1370 * After we receive ACK, do not send anything..
1371 * Just rm the node.. Done.. */
1373 case NES_CM_STATE_FIN_WAIT2:
1374 cm_node->tcp_cntxt.rcv_nxt++;
1375 cleanup_retrans_entry(cm_node);
1376 cm_node->state = NES_CM_STATE_TIME_WAIT;
1377 send_ack(cm_node, NULL);
1378 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1380 case NES_CM_STATE_TIME_WAIT:
1381 cm_node->tcp_cntxt.rcv_nxt++;
1382 cleanup_retrans_entry(cm_node);
1383 cm_node->state = NES_CM_STATE_CLOSED;
1384 rem_ref_cm_node(cm_node->cm_core, cm_node);
1386 case NES_CM_STATE_TSA:
1388 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1389 cm_node, cm_node->state);
1395 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1396 struct tcphdr *tcph)
1399 int reset = 0; /* whether to send reset in case of err.. */
1401 atomic_inc(&cm_resets_recvd);
1402 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1403 " refcnt=%d\n", cm_node, cm_node->state,
1404 atomic_read(&cm_node->ref_count));
1405 cleanup_retrans_entry(cm_node);
1406 switch (cm_node->state) {
1407 case NES_CM_STATE_SYN_SENT:
1408 case NES_CM_STATE_MPAREQ_SENT:
1409 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1410 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1411 cm_node->listener, cm_node->state);
1412 active_open_err(cm_node, skb, reset);
1414 case NES_CM_STATE_MPAREQ_RCVD:
1415 passive_state = atomic_add_return(1, &cm_node->passive_state);
1416 if (passive_state == NES_SEND_RESET_EVENT)
1417 create_event(cm_node, NES_CM_EVENT_RESET);
1418 cm_node->state = NES_CM_STATE_CLOSED;
1419 dev_kfree_skb_any(skb);
1421 case NES_CM_STATE_ESTABLISHED:
1422 case NES_CM_STATE_SYN_RCVD:
1423 case NES_CM_STATE_LISTENING:
1424 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1425 passive_open_err(cm_node, skb, reset);
1427 case NES_CM_STATE_TSA:
1428 active_open_err(cm_node, skb, reset);
1430 case NES_CM_STATE_CLOSED:
1433 case NES_CM_STATE_FIN_WAIT1:
1434 case NES_CM_STATE_LAST_ACK:
1435 cm_node->cm_id->rem_ref(cm_node->cm_id);
1436 case NES_CM_STATE_TIME_WAIT:
1437 cm_node->state = NES_CM_STATE_CLOSED;
1438 rem_ref_cm_node(cm_node->cm_core, cm_node);
1448 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1452 int datasize = skb->len;
1453 u8 *dataloc = skb->data;
1455 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1457 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1459 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1460 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1461 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1462 "cm_node=%p listener=%p state=%d\n", __func__,
1463 __LINE__, cm_node, cm_node->listener,
1465 active_open_err(cm_node, skb, 1);
1467 passive_open_err(cm_node, skb, 1);
1472 switch (cm_node->state) {
1473 case NES_CM_STATE_ESTABLISHED:
1474 if (res_type == NES_MPA_REQUEST_REJECT) {
1475 /*BIG problem as we are receiving the MPA.. So should
1476 * not be REJECT.. This is Passive Open.. We can
1477 * only receive it Reject for Active Open...*/
1480 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1481 type = NES_CM_EVENT_MPA_REQ;
1482 atomic_set(&cm_node->passive_state,
1483 NES_PASSIVE_STATE_INDICATED);
1485 case NES_CM_STATE_MPAREQ_SENT:
1486 cleanup_retrans_entry(cm_node);
1487 if (res_type == NES_MPA_REQUEST_REJECT) {
1488 type = NES_CM_EVENT_MPA_REJECT;
1489 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1491 type = NES_CM_EVENT_CONNECTED;
1492 cm_node->state = NES_CM_STATE_TSA;
1500 dev_kfree_skb_any(skb);
1501 create_event(cm_node, type);
1504 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1506 switch (cm_node->state) {
1507 case NES_CM_STATE_SYN_SENT:
1508 case NES_CM_STATE_MPAREQ_SENT:
1509 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1510 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1511 cm_node->listener, cm_node->state);
1512 active_open_err(cm_node, skb, 1);
1514 case NES_CM_STATE_ESTABLISHED:
1515 case NES_CM_STATE_SYN_RCVD:
1516 passive_open_err(cm_node, skb, 1);
1518 case NES_CM_STATE_TSA:
1524 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1525 struct sk_buff *skb)
1529 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1531 active_open_err(cm_node, skb, 1);
1536 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1537 struct sk_buff *skb)
1542 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1543 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1545 seq = ntohl(tcph->seq);
1546 ack_seq = ntohl(tcph->ack_seq);
1547 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1548 if (ack_seq != loc_seq_num)
1550 else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
1553 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1554 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1555 cm_node->listener, cm_node->state);
1556 indicate_pkt_err(cm_node, skb);
1557 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1558 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1565 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1566 * is created with a listener or it may comein as rexmitted packet which in
1567 * that case will be just dropped.
1570 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1571 struct tcphdr *tcph)
1577 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1579 inc_sequence = ntohl(tcph->seq);
1581 switch (cm_node->state) {
1582 case NES_CM_STATE_SYN_SENT:
1583 case NES_CM_STATE_MPAREQ_SENT:
1584 /* Rcvd syn on active open connection*/
1585 active_open_err(cm_node, skb, 1);
1587 case NES_CM_STATE_LISTENING:
1589 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1590 cm_node->listener->backlog) {
1591 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1594 passive_open_err(cm_node, skb, 0);
1597 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1600 passive_open_err(cm_node, skb, 0);
1604 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1605 BUG_ON(cm_node->send_entry);
1606 cm_node->accept_pend = 1;
1607 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1609 cm_node->state = NES_CM_STATE_SYN_RCVD;
1610 send_syn(cm_node, 1, skb);
1612 case NES_CM_STATE_CLOSED:
1613 cleanup_retrans_entry(cm_node);
1614 add_ref_cm_node(cm_node);
1615 send_reset(cm_node, skb);
1617 case NES_CM_STATE_TSA:
1618 case NES_CM_STATE_ESTABLISHED:
1619 case NES_CM_STATE_FIN_WAIT1:
1620 case NES_CM_STATE_FIN_WAIT2:
1621 case NES_CM_STATE_MPAREQ_RCVD:
1622 case NES_CM_STATE_LAST_ACK:
1623 case NES_CM_STATE_CLOSING:
1624 case NES_CM_STATE_UNKNOWN:
1631 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1632 struct tcphdr *tcph)
1639 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1641 inc_sequence = ntohl(tcph->seq);
1642 switch (cm_node->state) {
1643 case NES_CM_STATE_SYN_SENT:
1644 cleanup_retrans_entry(cm_node);
1646 if (check_syn(cm_node, tcph, skb))
1648 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1650 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1652 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1656 cleanup_retrans_entry(cm_node);
1657 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1658 send_mpa_request(cm_node, skb);
1659 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1661 case NES_CM_STATE_MPAREQ_RCVD:
1662 /* passive open, so should not be here */
1663 passive_open_err(cm_node, skb, 1);
1665 case NES_CM_STATE_LISTENING:
1666 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1667 cleanup_retrans_entry(cm_node);
1668 cm_node->state = NES_CM_STATE_CLOSED;
1669 send_reset(cm_node, skb);
1671 case NES_CM_STATE_CLOSED:
1672 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1673 cleanup_retrans_entry(cm_node);
1674 add_ref_cm_node(cm_node);
1675 send_reset(cm_node, skb);
1677 case NES_CM_STATE_ESTABLISHED:
1678 case NES_CM_STATE_FIN_WAIT1:
1679 case NES_CM_STATE_FIN_WAIT2:
1680 case NES_CM_STATE_LAST_ACK:
1681 case NES_CM_STATE_TSA:
1682 case NES_CM_STATE_CLOSING:
1683 case NES_CM_STATE_UNKNOWN:
1684 case NES_CM_STATE_MPAREQ_SENT:
1691 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1692 struct tcphdr *tcph)
1700 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1702 if (check_seq(cm_node, tcph, skb))
1705 skb_pull(skb, tcph->doff << 2);
1706 inc_sequence = ntohl(tcph->seq);
1707 rem_seq = ntohl(tcph->seq);
1708 rem_seq_ack = ntohl(tcph->ack_seq);
1709 datasize = skb->len;
1710 switch (cm_node->state) {
1711 case NES_CM_STATE_SYN_RCVD:
1713 cleanup_retrans_entry(cm_node);
1714 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1717 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1718 cm_node->state = NES_CM_STATE_ESTABLISHED;
1720 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1721 handle_rcv_mpa(cm_node, skb);
1722 } else /* rcvd ACK only */
1723 dev_kfree_skb_any(skb);
1725 case NES_CM_STATE_ESTABLISHED:
1727 cleanup_retrans_entry(cm_node);
1729 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1730 handle_rcv_mpa(cm_node, skb);
1734 case NES_CM_STATE_MPAREQ_SENT:
1735 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1737 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1738 handle_rcv_mpa(cm_node, skb);
1739 } else /* Could be just an ack pkt.. */
1740 dev_kfree_skb_any(skb);
1742 case NES_CM_STATE_LISTENING:
1743 cleanup_retrans_entry(cm_node);
1744 cm_node->state = NES_CM_STATE_CLOSED;
1745 send_reset(cm_node, skb);
1747 case NES_CM_STATE_CLOSED:
1748 cleanup_retrans_entry(cm_node);
1749 add_ref_cm_node(cm_node);
1750 send_reset(cm_node, skb);
1752 case NES_CM_STATE_LAST_ACK:
1753 case NES_CM_STATE_CLOSING:
1754 cleanup_retrans_entry(cm_node);
1755 cm_node->state = NES_CM_STATE_CLOSED;
1756 cm_node->cm_id->rem_ref(cm_node->cm_id);
1757 rem_ref_cm_node(cm_node->cm_core, cm_node);
1760 case NES_CM_STATE_FIN_WAIT1:
1761 cleanup_retrans_entry(cm_node);
1763 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1765 case NES_CM_STATE_SYN_SENT:
1766 case NES_CM_STATE_FIN_WAIT2:
1767 case NES_CM_STATE_TSA:
1768 case NES_CM_STATE_MPAREQ_RCVD:
1769 case NES_CM_STATE_UNKNOWN:
1771 cleanup_retrans_entry(cm_node);
1780 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1781 struct sk_buff *skb, int optionsize, int passive)
1783 u8 *optionsloc = (u8 *)&tcph[1];
1785 if (process_options(cm_node, optionsloc, optionsize,
1787 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1790 passive_open_err(cm_node, skb, 1);
1792 active_open_err(cm_node, skb, 1);
1797 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1798 cm_node->tcp_cntxt.snd_wscale;
1800 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1801 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1806 * active_open_err() will send reset() if flag set..
1807 * It will also send ABORT event.
1810 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1813 cleanup_retrans_entry(cm_node);
1815 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1816 "state=%d\n", cm_node, cm_node->state);
1817 add_ref_cm_node(cm_node);
1818 send_reset(cm_node, skb);
1820 dev_kfree_skb_any(skb);
1822 cm_node->state = NES_CM_STATE_CLOSED;
1823 create_event(cm_node, NES_CM_EVENT_ABORTED);
1827 * passive_open_err() will either do a reset() or will free up the skb and
1828 * remove the cm_node.
1831 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1834 cleanup_retrans_entry(cm_node);
1835 cm_node->state = NES_CM_STATE_CLOSED;
1837 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1838 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1839 send_reset(cm_node, skb);
1841 dev_kfree_skb_any(skb);
1842 rem_ref_cm_node(cm_node->cm_core, cm_node);
1847 * free_retrans_entry() routines assumes that the retrans_list_lock has
1848 * been acquired before calling.
1850 static void free_retrans_entry(struct nes_cm_node *cm_node)
1852 struct nes_timer_entry *send_entry;
1853 send_entry = cm_node->send_entry;
1855 cm_node->send_entry = NULL;
1856 dev_kfree_skb_any(send_entry->skb);
1858 rem_ref_cm_node(cm_node->cm_core, cm_node);
1862 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1864 unsigned long flags;
1866 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1867 free_retrans_entry(cm_node);
1868 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1873 * Returns skb if to be freed, else it will return NULL if already used..
1875 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1876 struct nes_cm_core *cm_core)
1878 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1879 struct tcphdr *tcph = tcp_hdr(skb);
1882 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1884 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1885 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1886 tcph->ack, tcph->rst, tcph->fin);
1889 pkt_type = NES_PKT_TYPE_RST;
1890 else if (tcph->syn) {
1891 pkt_type = NES_PKT_TYPE_SYN;
1893 pkt_type = NES_PKT_TYPE_SYNACK;
1894 } else if (tcph->ack)
1895 pkt_type = NES_PKT_TYPE_ACK;
1900 case NES_PKT_TYPE_SYN:
1901 handle_syn_pkt(cm_node, skb, tcph);
1903 case NES_PKT_TYPE_SYNACK:
1904 handle_synack_pkt(cm_node, skb, tcph);
1906 case NES_PKT_TYPE_ACK:
1907 ret = handle_ack_pkt(cm_node, skb, tcph);
1908 if (fin_set && !ret)
1909 handle_fin_pkt(cm_node);
1911 case NES_PKT_TYPE_RST:
1912 handle_rst_pkt(cm_node, skb, tcph);
1915 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
1916 handle_fin_pkt(cm_node);
1923 * mini_cm_listen - create a listen node with params
1925 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1926 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1928 struct nes_cm_listener *listener;
1929 unsigned long flags;
1931 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1932 cm_info->loc_addr, cm_info->loc_port);
1934 /* cannot have multiple matching listeners */
1935 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1936 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1937 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1938 /* find automatically incs ref count ??? */
1939 atomic_dec(&listener->ref_count);
1940 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1945 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1946 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1948 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1952 listener->loc_addr = htonl(cm_info->loc_addr);
1953 listener->loc_port = htons(cm_info->loc_port);
1954 listener->reused_node = 0;
1956 atomic_set(&listener->ref_count, 1);
1959 /* find already inc'ed the ref count */
1961 listener->reused_node = 1;
1964 listener->cm_id = cm_info->cm_id;
1965 atomic_set(&listener->pend_accepts_cnt, 0);
1966 listener->cm_core = cm_core;
1967 listener->nesvnic = nesvnic;
1968 atomic_inc(&cm_core->node_cnt);
1970 listener->conn_type = cm_info->conn_type;
1971 listener->backlog = cm_info->backlog;
1972 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1974 if (!listener->reused_node) {
1975 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1976 list_add(&listener->list, &cm_core->listen_list.list);
1977 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1978 atomic_inc(&cm_core->listen_node_cnt);
1981 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1982 " listener = %p, backlog = %d, cm_id = %p.\n",
1983 cm_info->loc_addr, cm_info->loc_port,
1984 listener, listener->backlog, listener->cm_id);
1991 * mini_cm_connect - make a connection node with params
1993 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1994 struct nes_vnic *nesvnic, u16 private_data_len,
1995 void *private_data, struct nes_cm_info *cm_info)
1998 struct nes_cm_node *cm_node;
1999 struct nes_cm_listener *loopbackremotelistener;
2000 struct nes_cm_node *loopbackremotenode;
2001 struct nes_cm_info loopback_cm_info;
2002 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
2003 struct ietf_mpa_frame *mpa_frame = NULL;
2005 /* create a CM connection node */
2006 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2009 mpa_frame = &cm_node->mpa_frame;
2010 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
2011 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2012 mpa_frame->rev = IETF_MPA_VERSION;
2013 mpa_frame->priv_data_len = htons(private_data_len);
2015 /* set our node side to client (active) side */
2016 cm_node->tcp_cntxt.client = 1;
2017 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2019 if (cm_info->loc_addr == cm_info->rem_addr) {
2020 loopbackremotelistener = find_listener(cm_core,
2021 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2022 NES_CM_LISTENER_ACTIVE_STATE);
2023 if (loopbackremotelistener == NULL) {
2024 create_event(cm_node, NES_CM_EVENT_ABORTED);
2026 loopback_cm_info = *cm_info;
2027 loopback_cm_info.loc_port = cm_info->rem_port;
2028 loopback_cm_info.rem_port = cm_info->loc_port;
2029 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2030 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2031 &loopback_cm_info, loopbackremotelistener);
2032 if (!loopbackremotenode) {
2033 rem_ref_cm_node(cm_node->cm_core, cm_node);
2036 atomic_inc(&cm_loopbacks);
2037 loopbackremotenode->loopbackpartner = cm_node;
2038 loopbackremotenode->tcp_cntxt.rcv_wscale =
2039 NES_CM_DEFAULT_RCV_WND_SCALE;
2040 cm_node->loopbackpartner = loopbackremotenode;
2041 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2043 loopbackremotenode->mpa_frame_size = private_data_len;
2045 /* we are done handling this state. */
2046 /* set node to a TSA state */
2047 cm_node->state = NES_CM_STATE_TSA;
2048 cm_node->tcp_cntxt.rcv_nxt =
2049 loopbackremotenode->tcp_cntxt.loc_seq_num;
2050 loopbackremotenode->tcp_cntxt.rcv_nxt =
2051 cm_node->tcp_cntxt.loc_seq_num;
2052 cm_node->tcp_cntxt.max_snd_wnd =
2053 loopbackremotenode->tcp_cntxt.rcv_wnd;
2054 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2055 cm_node->tcp_cntxt.rcv_wnd;
2056 cm_node->tcp_cntxt.snd_wnd =
2057 loopbackremotenode->tcp_cntxt.rcv_wnd;
2058 loopbackremotenode->tcp_cntxt.snd_wnd =
2059 cm_node->tcp_cntxt.rcv_wnd;
2060 cm_node->tcp_cntxt.snd_wscale =
2061 loopbackremotenode->tcp_cntxt.rcv_wscale;
2062 loopbackremotenode->tcp_cntxt.snd_wscale =
2063 cm_node->tcp_cntxt.rcv_wscale;
2064 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2065 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2070 /* set our node side to client (active) side */
2071 cm_node->tcp_cntxt.client = 1;
2072 /* init our MPA frame ptr */
2073 memcpy(mpa_frame->priv_data, private_data, private_data_len);
2075 cm_node->mpa_frame_size = mpa_frame_size;
2077 /* send a syn and goto syn sent state */
2078 cm_node->state = NES_CM_STATE_SYN_SENT;
2079 ret = send_syn(cm_node, 0, NULL);
2082 /* error in sending the syn free up the cm_node struct */
2083 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2084 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2085 cm_node->rem_addr, cm_node->rem_port, cm_node,
2087 rem_ref_cm_node(cm_node->cm_core, cm_node);
2092 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2093 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2094 cm_node->rem_addr, cm_node->rem_port, cm_node,
2102 * mini_cm_accept - accept a connection
2103 * This function is never called
2105 static int mini_cm_accept(struct nes_cm_core *cm_core,
2106 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2113 * mini_cm_reject - reject and teardown a connection
2115 static int mini_cm_reject(struct nes_cm_core *cm_core,
2116 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2121 struct nes_cm_event event;
2122 struct iw_cm_id *cm_id = cm_node->cm_id;
2123 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2125 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2126 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2128 if (cm_node->tcp_cntxt.client)
2130 cleanup_retrans_entry(cm_node);
2133 passive_state = atomic_add_return(1, &cm_node->passive_state);
2134 if (passive_state == NES_SEND_RESET_EVENT) {
2135 cm_node->state = NES_CM_STATE_CLOSED;
2136 rem_ref_cm_node(cm_core, cm_node);
2138 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2139 rem_ref_cm_node(cm_core, cm_node);
2141 ret = send_mpa_reject(cm_node);
2143 cm_node->state = NES_CM_STATE_CLOSED;
2144 err = send_reset(cm_node, NULL);
2148 cm_id->add_ref(cm_id);
2152 cm_node->cm_id = NULL;
2153 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2154 rem_ref_cm_node(cm_core, cm_node);
2155 rem_ref_cm_node(cm_core, loopback);
2157 event.cm_node = loopback;
2158 event.cm_info.rem_addr = loopback->rem_addr;
2159 event.cm_info.loc_addr = loopback->loc_addr;
2160 event.cm_info.rem_port = loopback->rem_port;
2161 event.cm_info.loc_port = loopback->loc_port;
2162 event.cm_info.cm_id = loopback->cm_id;
2163 cm_event_mpa_reject(&event);
2164 rem_ref_cm_node(cm_core, cm_node);
2165 loopback->state = NES_CM_STATE_CLOSING;
2167 cm_id = loopback->cm_id;
2168 rem_ref_cm_node(cm_core, loopback);
2169 cm_id->rem_ref(cm_id);
2180 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2184 if (!cm_core || !cm_node)
2187 switch (cm_node->state) {
2188 case NES_CM_STATE_SYN_RCVD:
2189 case NES_CM_STATE_SYN_SENT:
2190 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2191 case NES_CM_STATE_ESTABLISHED:
2192 case NES_CM_STATE_ACCEPTING:
2193 case NES_CM_STATE_MPAREQ_SENT:
2194 case NES_CM_STATE_MPAREQ_RCVD:
2195 cleanup_retrans_entry(cm_node);
2196 send_reset(cm_node, NULL);
2198 case NES_CM_STATE_CLOSE_WAIT:
2199 cm_node->state = NES_CM_STATE_LAST_ACK;
2200 send_fin(cm_node, NULL);
2202 case NES_CM_STATE_FIN_WAIT1:
2203 case NES_CM_STATE_FIN_WAIT2:
2204 case NES_CM_STATE_LAST_ACK:
2205 case NES_CM_STATE_TIME_WAIT:
2206 case NES_CM_STATE_CLOSING:
2209 case NES_CM_STATE_LISTENING:
2210 cleanup_retrans_entry(cm_node);
2211 send_reset(cm_node, NULL);
2213 case NES_CM_STATE_MPAREJ_RCVD:
2214 case NES_CM_STATE_UNKNOWN:
2215 case NES_CM_STATE_INITED:
2216 case NES_CM_STATE_CLOSED:
2217 case NES_CM_STATE_LISTENER_DESTROYED:
2218 ret = rem_ref_cm_node(cm_core, cm_node);
2220 case NES_CM_STATE_TSA:
2221 if (cm_node->send_entry)
2222 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2223 "send_entry=%p\n", cm_node->send_entry);
2224 ret = rem_ref_cm_node(cm_core, cm_node);
2232 * recv_pkt - recv an ETHERNET packet, and process it through CM
2233 * node state machine
2235 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2236 struct nes_vnic *nesvnic, struct sk_buff *skb)
2238 struct nes_cm_node *cm_node = NULL;
2239 struct nes_cm_listener *listener = NULL;
2241 struct tcphdr *tcph;
2242 struct nes_cm_info nfo;
2243 int skb_handled = 1;
2244 __be32 tmp_daddr, tmp_saddr;
2248 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2252 iph = (struct iphdr *)skb->data;
2253 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2255 nfo.loc_addr = ntohl(iph->daddr);
2256 nfo.loc_port = ntohs(tcph->dest);
2257 nfo.rem_addr = ntohl(iph->saddr);
2258 nfo.rem_port = ntohs(tcph->source);
2260 tmp_daddr = cpu_to_be32(iph->daddr);
2261 tmp_saddr = cpu_to_be32(iph->saddr);
2263 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2264 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2267 cm_node = find_node(cm_core,
2268 nfo.rem_port, nfo.rem_addr,
2269 nfo.loc_port, nfo.loc_addr);
2272 /* Only type of packet accepted are for */
2273 /* the PASSIVE open (syn only) */
2274 if ((!tcph->syn) || (tcph->ack)) {
2278 listener = find_listener(cm_core, nfo.loc_addr,
2280 NES_CM_LISTENER_ACTIVE_STATE);
2284 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2288 nfo.cm_id = listener->cm_id;
2289 nfo.conn_type = listener->conn_type;
2290 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2293 nes_debug(NES_DBG_CM, "Unable to allocate "
2295 cm_packets_dropped++;
2296 atomic_dec(&listener->ref_count);
2297 dev_kfree_skb_any(skb);
2300 if (!tcph->rst && !tcph->fin) {
2301 cm_node->state = NES_CM_STATE_LISTENING;
2303 cm_packets_dropped++;
2304 rem_ref_cm_node(cm_core, cm_node);
2305 dev_kfree_skb_any(skb);
2308 add_ref_cm_node(cm_node);
2309 } else if (cm_node->state == NES_CM_STATE_TSA) {
2310 rem_ref_cm_node(cm_core, cm_node);
2311 atomic_inc(&cm_accel_dropped_pkts);
2312 dev_kfree_skb_any(skb);
2315 skb_reset_network_header(skb);
2316 skb_set_transport_header(skb, sizeof(*tcph));
2317 skb->len = ntohs(iph->tot_len);
2318 process_packet(cm_node, skb, cm_core);
2319 rem_ref_cm_node(cm_core, cm_node);
2326 * nes_cm_alloc_core - allocate a top level instance of a cm core
2328 static struct nes_cm_core *nes_cm_alloc_core(void)
2330 struct nes_cm_core *cm_core;
2332 /* setup the CM core */
2333 /* alloc top level core control structure */
2334 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2338 INIT_LIST_HEAD(&cm_core->connected_nodes);
2339 init_timer(&cm_core->tcp_timer);
2340 cm_core->tcp_timer.function = nes_cm_timer_tick;
2342 cm_core->mtu = NES_CM_DEFAULT_MTU;
2343 cm_core->state = NES_CM_STATE_INITED;
2344 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2346 atomic_set(&cm_core->events_posted, 0);
2348 cm_core->api = &nes_cm_api;
2350 spin_lock_init(&cm_core->ht_lock);
2351 spin_lock_init(&cm_core->listen_list_lock);
2353 INIT_LIST_HEAD(&cm_core->listen_list.list);
2355 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2357 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2358 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2359 cm_core->post_event = nes_cm_post_event;
2360 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2361 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2363 print_core(cm_core);
2369 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2371 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2373 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2380 if (timer_pending(&cm_core->tcp_timer)) {
2381 del_timer(&cm_core->tcp_timer);
2384 destroy_workqueue(cm_core->event_wq);
2385 destroy_workqueue(cm_core->disconn_wq);
2386 nes_debug(NES_DBG_CM, "\n");
2396 static int mini_cm_get(struct nes_cm_core *cm_core)
2398 return cm_core->state;
2405 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2410 case NES_CM_SET_PKT_SIZE:
2411 cm_core->mtu = value;
2413 case NES_CM_SET_FREE_PKT_Q_SIZE:
2414 cm_core->free_tx_pkt_max = value;
2417 /* unknown set option */
2426 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2427 * successfully exchanged when this is called
2429 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2436 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2437 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2438 NES_QPCONTEXT_MISC_DROS);
2440 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2441 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2443 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2445 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2447 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2448 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2450 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2451 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2452 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2454 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2455 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2456 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2458 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2459 nesqp->nesqp_context->ts_recent = 0;
2460 nesqp->nesqp_context->ts_age = 0;
2461 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2462 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2463 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2464 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2465 cm_node->tcp_cntxt.rcv_wscale);
2466 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2467 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2468 nesqp->nesqp_context->srtt = 0;
2469 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2470 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2471 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2472 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2473 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2474 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2476 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2477 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2478 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2479 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2480 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2481 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2482 le32_to_cpu(nesqp->nesqp_context->misc));
2483 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2484 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2485 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2487 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2488 cm_node->state = NES_CM_STATE_TSA;
2497 int nes_cm_disconn(struct nes_qp *nesqp)
2499 struct disconn_work *work;
2501 work = kzalloc(sizeof *work, GFP_ATOMIC);
2503 return -ENOMEM; /* Timer will clean up */
2505 nes_add_ref(&nesqp->ibqp);
2506 work->nesqp = nesqp;
2507 INIT_WORK(&work->work, nes_disconnect_worker);
2508 queue_work(g_cm_core->disconn_wq, &work->work);
2514 * nes_disconnect_worker
2516 static void nes_disconnect_worker(struct work_struct *work)
2518 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2519 struct nes_qp *nesqp = dwork->nesqp;
2522 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2523 nesqp->last_aeq, nesqp->hwqp.qp_id);
2524 nes_cm_disconn_true(nesqp);
2525 nes_rem_ref(&nesqp->ibqp);
2530 * nes_cm_disconn_true
2532 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2534 unsigned long flags;
2536 struct iw_cm_id *cm_id;
2537 struct iw_cm_event cm_event;
2538 struct nes_vnic *nesvnic;
2540 u8 original_hw_tcp_state;
2541 u8 original_ibqp_state;
2542 enum iw_cm_event_type disconn_status = IW_CM_EVENT_STATUS_OK;
2543 int issue_disconn = 0;
2544 int issue_close = 0;
2545 int issue_flush = 0;
2546 u32 flush_q = NES_CQP_FLUSH_RQ;
2547 struct ib_event ibevent;
2550 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2554 spin_lock_irqsave(&nesqp->lock, flags);
2555 cm_id = nesqp->cm_id;
2556 /* make sure we havent already closed this connection */
2558 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2560 spin_unlock_irqrestore(&nesqp->lock, flags);
2564 nesvnic = to_nesvnic(nesqp->ibqp.device);
2565 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2567 original_hw_tcp_state = nesqp->hw_tcp_state;
2568 original_ibqp_state = nesqp->ibqp_state;
2569 last_ae = nesqp->last_aeq;
2571 if (nesqp->term_flags) {
2574 nesqp->cm_id = NULL;
2575 if (nesqp->flush_issued == 0) {
2576 nesqp->flush_issued = 1;
2579 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2580 ((original_ibqp_state == IB_QPS_RTS) &&
2581 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2583 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2584 disconn_status = IW_CM_EVENT_STATUS_RESET;
2587 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2588 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2589 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2590 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2592 nesqp->cm_id = NULL;
2593 if (nesqp->flush_issued == 0) {
2594 nesqp->flush_issued = 1;
2599 spin_unlock_irqrestore(&nesqp->lock, flags);
2601 if ((issue_flush) && (nesqp->destroyed == 0)) {
2602 /* Flush the queue(s) */
2603 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2604 flush_q |= NES_CQP_FLUSH_SQ;
2605 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2607 if (nesqp->term_flags) {
2608 ibevent.device = nesqp->ibqp.device;
2609 ibevent.event = nesqp->terminate_eventtype;
2610 ibevent.element.qp = &nesqp->ibqp;
2611 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2615 if ((cm_id) && (cm_id->event_handler)) {
2616 if (issue_disconn) {
2617 atomic_inc(&cm_disconnects);
2618 cm_event.event = IW_CM_EVENT_DISCONNECT;
2619 cm_event.status = disconn_status;
2620 cm_event.local_addr = cm_id->local_addr;
2621 cm_event.remote_addr = cm_id->remote_addr;
2622 cm_event.private_data = NULL;
2623 cm_event.private_data_len = 0;
2625 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2626 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2627 "cm_id = %p, refcount = %u.\n",
2628 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2629 nesqp->hwqp.sq_tail, cm_id,
2630 atomic_read(&nesqp->refcount));
2632 ret = cm_id->event_handler(cm_id, &cm_event);
2634 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2635 "returned, ret=%d\n", ret);
2639 atomic_inc(&cm_closes);
2640 nes_disconnect(nesqp, 1);
2642 cm_id->provider_data = nesqp;
2643 /* Send up the close complete event */
2644 cm_event.event = IW_CM_EVENT_CLOSE;
2645 cm_event.status = IW_CM_EVENT_STATUS_OK;
2646 cm_event.provider_data = cm_id->provider_data;
2647 cm_event.local_addr = cm_id->local_addr;
2648 cm_event.remote_addr = cm_id->remote_addr;
2649 cm_event.private_data = NULL;
2650 cm_event.private_data_len = 0;
2652 ret = cm_id->event_handler(cm_id, &cm_event);
2654 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2657 cm_id->rem_ref(cm_id);
2668 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2671 struct nes_vnic *nesvnic;
2672 struct nes_device *nesdev;
2673 struct nes_ib_device *nesibdev;
2675 nesvnic = to_nesvnic(nesqp->ibqp.device);
2679 nesdev = nesvnic->nesdev;
2680 nesibdev = nesvnic->nesibdev;
2682 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2683 atomic_read(&nesvnic->netdev->refcnt));
2685 if (nesqp->active_conn) {
2687 /* indicate this connection is NOT active */
2688 nesqp->active_conn = 0;
2690 /* Need to free the Last Streaming Mode Message */
2691 if (nesqp->ietf_frame) {
2693 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2694 pci_free_consistent(nesdev->pcidev,
2695 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2696 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2700 /* close the CM node down if it is still active */
2701 if (nesqp->cm_node) {
2702 nes_debug(NES_DBG_CM, "Call close API\n");
2704 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2714 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2718 struct nes_qp *nesqp;
2719 struct nes_vnic *nesvnic;
2720 struct nes_device *nesdev;
2721 struct nes_cm_node *cm_node;
2722 struct nes_adapter *adapter;
2723 struct ib_qp_attr attr;
2724 struct iw_cm_event cm_event;
2725 struct nes_hw_qp_wqe *wqe;
2726 struct nes_v4_quad nes_quad;
2730 struct nes_ib_device *nesibdev;
2731 struct ib_mr *ibmr = NULL;
2732 struct ib_phys_buf ibphysbuf;
2733 struct nes_pd *nespd;
2736 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2740 /* get all our handles */
2741 nesqp = to_nesqp(ibqp);
2742 nesvnic = to_nesvnic(nesqp->ibqp.device);
2743 nesdev = nesvnic->nesdev;
2744 adapter = nesdev->nesadapter;
2746 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2747 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2748 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2749 nesvnic->netdev->name);
2751 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
2752 if (cm_node->loopbackpartner)
2753 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
2754 rem_ref_cm_node(cm_node->cm_core, cm_node);
2758 /* associate the node with the QP */
2759 nesqp->cm_node = (void *)cm_node;
2760 cm_node->nesqp = nesqp;
2762 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2763 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2764 atomic_inc(&cm_accepts);
2766 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2767 atomic_read(&nesvnic->netdev->refcnt));
2769 /* allocate the ietf frame and space for private data */
2770 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2771 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2772 &nesqp->ietf_frame_pbase);
2774 if (!nesqp->ietf_frame) {
2775 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2781 /* setup the MPA frame */
2782 nesqp->private_data_len = conn_param->private_data_len;
2783 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2785 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2786 conn_param->private_data_len);
2788 nesqp->ietf_frame->priv_data_len =
2789 cpu_to_be16(conn_param->private_data_len);
2790 nesqp->ietf_frame->rev = mpa_version;
2791 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2793 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2794 wqe = &nesqp->hwqp.sq_vbase[0];
2796 if (cm_id->remote_addr.sin_addr.s_addr !=
2797 cm_id->local_addr.sin_addr.s_addr) {
2798 u64temp = (unsigned long)nesqp;
2799 nesibdev = nesvnic->nesibdev;
2800 nespd = nesqp->nespd;
2801 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2802 ibphysbuf.size = conn_param->private_data_len +
2803 sizeof(struct ietf_mpa_frame);
2804 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
2805 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2807 IB_ACCESS_LOCAL_WRITE,
2810 nes_debug(NES_DBG_CM, "Unable to register memory region"
2811 "for lSMM for cm_node = %p \n",
2813 pci_free_consistent(nesdev->pcidev,
2814 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2815 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2819 ibmr->pd = &nespd->ibpd;
2820 ibmr->device = nespd->ibpd.device;
2821 nesqp->lsmm_mr = ibmr;
2823 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2824 set_wqe_64bit_value(wqe->wqe_words,
2825 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2827 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2828 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2829 NES_IWARP_SQ_WQE_WRPDU);
2830 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2831 cpu_to_le32(conn_param->private_data_len +
2832 sizeof(struct ietf_mpa_frame));
2833 set_wqe_64bit_value(wqe->wqe_words,
2834 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
2835 (u64)(unsigned long)nesqp->ietf_frame);
2836 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2837 cpu_to_le32(conn_param->private_data_len +
2838 sizeof(struct ietf_mpa_frame));
2839 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
2840 if (nesqp->sq_kmapped) {
2841 nesqp->sq_kmapped = 0;
2842 kunmap(nesqp->page);
2845 nesqp->nesqp_context->ird_ord_sizes |=
2846 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2847 NES_QPCONTEXT_ORDIRD_WRPDU);
2849 nesqp->nesqp_context->ird_ord_sizes |=
2850 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
2852 nesqp->skip_lsmm = 1;
2855 /* Cache the cm_id in the qp */
2856 nesqp->cm_id = cm_id;
2857 cm_node->cm_id = cm_id;
2859 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2860 cm_id->provider_data = nesqp;
2861 nesqp->active_conn = 0;
2863 if (cm_node->state == NES_CM_STATE_TSA)
2864 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2867 nes_cm_init_tsa_conn(nesqp, cm_node);
2869 nesqp->nesqp_context->tcpPorts[0] =
2870 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2871 nesqp->nesqp_context->tcpPorts[1] =
2872 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2874 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2875 nesqp->nesqp_context->ip0 =
2876 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2878 nesqp->nesqp_context->ip0 =
2879 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2881 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2882 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2883 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2885 nesqp->nesqp_context->arp_index_vlan |=
2886 cpu_to_le32(nes_arp_table(nesdev,
2887 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2888 NES_ARP_RESOLVE) << 16);
2890 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2891 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2893 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2895 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2896 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2897 nesqp->nesqp_context->ird_ord_sizes |=
2898 cpu_to_le32((u32)conn_param->ord);
2900 memset(&nes_quad, 0, sizeof(nes_quad));
2901 nes_quad.DstIpAdrIndex =
2902 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2903 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2904 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2906 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2907 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2908 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2910 /* Produce hash key */
2911 crc_value = get_crc_value(&nes_quad);
2912 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2913 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2914 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2916 nesqp->hte_index &= adapter->hte_index_mask;
2917 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2919 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2921 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2922 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2923 "private data length=%zu.\n", nesqp->hwqp.qp_id,
2924 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2925 ntohs(cm_id->remote_addr.sin_port),
2926 ntohl(cm_id->local_addr.sin_addr.s_addr),
2927 ntohs(cm_id->local_addr.sin_port),
2928 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2929 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2930 conn_param->private_data_len +
2931 sizeof(struct ietf_mpa_frame));
2934 /* notify OF layer that accept event was successful */
2935 cm_id->add_ref(cm_id);
2936 nes_add_ref(&nesqp->ibqp);
2938 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2939 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2940 cm_event.provider_data = (void *)nesqp;
2941 cm_event.local_addr = cm_id->local_addr;
2942 cm_event.remote_addr = cm_id->remote_addr;
2943 cm_event.private_data = NULL;
2944 cm_event.private_data_len = 0;
2945 ret = cm_id->event_handler(cm_id, &cm_event);
2946 attr.qp_state = IB_QPS_RTS;
2947 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2948 if (cm_node->loopbackpartner) {
2949 cm_node->loopbackpartner->mpa_frame_size =
2950 nesqp->private_data_len;
2951 /* copy entire MPA frame to our cm_node's frame */
2952 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2953 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2954 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2957 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2958 "ret=%d\n", __func__, __LINE__, ret);
2960 passive_state = atomic_add_return(1, &cm_node->passive_state);
2961 if (passive_state == NES_SEND_RESET_EVENT)
2962 create_event(cm_node, NES_CM_EVENT_RESET);
2970 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2972 struct nes_cm_node *cm_node;
2973 struct nes_cm_node *loopback;
2975 struct nes_cm_core *cm_core;
2977 atomic_inc(&cm_rejects);
2978 cm_node = (struct nes_cm_node *) cm_id->provider_data;
2979 loopback = cm_node->loopbackpartner;
2980 cm_core = cm_node->cm_core;
2981 cm_node->cm_id = cm_id;
2982 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2984 if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
2987 memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2989 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
2990 loopback->mpa_frame.priv_data_len = pdata_len;
2991 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
2994 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2995 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2998 cm_node->mpa_frame.rev = mpa_version;
2999 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
3001 return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
3007 * setup and launch cm connect node
3009 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3012 struct nes_qp *nesqp;
3013 struct nes_vnic *nesvnic;
3014 struct nes_device *nesdev;
3015 struct nes_cm_node *cm_node;
3016 struct nes_cm_info cm_info;
3019 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3022 nesqp = to_nesqp(ibqp);
3025 nesvnic = to_nesvnic(nesqp->ibqp.device);
3028 nesdev = nesvnic->nesdev;
3032 if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3035 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3036 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3037 ntohl(nesvnic->local_ipaddr),
3038 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3039 ntohs(cm_id->remote_addr.sin_port),
3040 ntohl(cm_id->local_addr.sin_addr.s_addr),
3041 ntohs(cm_id->local_addr.sin_port));
3043 atomic_inc(&cm_connects);
3044 nesqp->active_conn = 1;
3046 /* cache the cm_id in the qp */
3047 nesqp->cm_id = cm_id;
3049 cm_id->provider_data = nesqp;
3051 nesqp->private_data_len = conn_param->private_data_len;
3052 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3053 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3054 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3055 conn_param->private_data_len);
3057 if (cm_id->local_addr.sin_addr.s_addr !=
3058 cm_id->remote_addr.sin_addr.s_addr) {
3059 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3060 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3064 /* set up the connection params for the node */
3065 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3066 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3067 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3068 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3069 cm_info.cm_id = cm_id;
3070 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3072 cm_id->add_ref(cm_id);
3074 /* create a connect CM node connection */
3075 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3076 conn_param->private_data_len, (void *)conn_param->private_data,
3080 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3081 PCI_FUNC(nesdev->pcidev->devfn),
3082 NES_MANAGE_APBVT_DEL);
3084 cm_id->rem_ref(cm_id);
3088 cm_node->apbvt_set = apbvt_set;
3089 nesqp->cm_node = cm_node;
3090 cm_node->nesqp = nesqp;
3091 nes_add_ref(&nesqp->ibqp);
3100 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3102 struct nes_vnic *nesvnic;
3103 struct nes_cm_listener *cm_node;
3104 struct nes_cm_info cm_info;
3105 struct nes_adapter *adapter;
3109 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3110 cm_id, ntohs(cm_id->local_addr.sin_port));
3112 nesvnic = to_nesvnic(cm_id->device);
3115 adapter = nesvnic->nesdev->nesadapter;
3116 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3117 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3119 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3120 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3122 /* setup listen params in our api call struct */
3123 cm_info.loc_addr = nesvnic->local_ipaddr;
3124 cm_info.loc_port = cm_id->local_addr.sin_port;
3125 cm_info.backlog = backlog;
3126 cm_info.cm_id = cm_id;
3128 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3131 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3133 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3134 __func__, __LINE__);
3138 cm_id->provider_data = cm_node;
3140 if (!cm_node->reused_node) {
3141 err = nes_manage_apbvt(nesvnic,
3142 ntohs(cm_id->local_addr.sin_port),
3143 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3144 NES_MANAGE_APBVT_ADD);
3146 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3148 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3151 cm_listens_created++;
3154 cm_id->add_ref(cm_id);
3155 cm_id->provider_data = (void *)cm_node;
3163 * nes_destroy_listen
3165 int nes_destroy_listen(struct iw_cm_id *cm_id)
3167 if (cm_id->provider_data)
3168 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3170 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3172 cm_id->rem_ref(cm_id);
3181 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3184 cm_packets_received++;
3185 if ((g_cm_core) && (g_cm_core->api)) {
3186 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3188 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3189 " cm is not setup properly.\n");
3198 * Start and init a cm core module
3200 int nes_cm_start(void)
3202 nes_debug(NES_DBG_CM, "\n");
3203 /* create the primary CM core, pass this handle to subsequent core inits */
3204 g_cm_core = nes_cm_alloc_core();
3215 * stop and dealloc all cm core instances
3217 int nes_cm_stop(void)
3219 g_cm_core->api->destroy_cm_core(g_cm_core);
3225 * cm_event_connected
3226 * handle a connected event, setup QPs and HW
3228 static void cm_event_connected(struct nes_cm_event *event)
3231 struct nes_qp *nesqp;
3232 struct nes_vnic *nesvnic;
3233 struct nes_device *nesdev;
3234 struct nes_cm_node *cm_node;
3235 struct nes_adapter *nesadapter;
3236 struct ib_qp_attr attr;
3237 struct iw_cm_id *cm_id;
3238 struct iw_cm_event cm_event;
3239 struct nes_hw_qp_wqe *wqe;
3240 struct nes_v4_quad nes_quad;
3244 /* get all our handles */
3245 cm_node = event->cm_node;
3246 cm_id = cm_node->cm_id;
3247 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3248 nesqp = (struct nes_qp *)cm_id->provider_data;
3249 nesvnic = to_nesvnic(nesqp->ibqp.device);
3250 nesdev = nesvnic->nesdev;
3251 nesadapter = nesdev->nesadapter;
3253 if (nesqp->destroyed) {
3256 atomic_inc(&cm_connecteds);
3257 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3258 " local port 0x%04X. jiffies = %lu.\n",
3260 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3261 ntohs(cm_id->remote_addr.sin_port),
3262 ntohs(cm_id->local_addr.sin_port),
3265 nes_cm_init_tsa_conn(nesqp, cm_node);
3267 /* set the QP tsa context */
3268 nesqp->nesqp_context->tcpPorts[0] =
3269 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3270 nesqp->nesqp_context->tcpPorts[1] =
3271 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3272 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3273 nesqp->nesqp_context->ip0 =
3274 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3276 nesqp->nesqp_context->ip0 =
3277 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3279 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3280 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3281 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3282 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3283 nes_arp_table(nesdev,
3284 le32_to_cpu(nesqp->nesqp_context->ip0),
3285 NULL, NES_ARP_RESOLVE) << 16);
3286 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3287 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3288 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3289 nesqp->nesqp_context->ird_ord_sizes |=
3290 cpu_to_le32((u32)1 <<
3291 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3293 /* Adjust tail for not having a LSMM */
3294 nesqp->hwqp.sq_tail = 1;
3296 #if defined(NES_SEND_FIRST_WRITE)
3297 if (cm_node->send_write0) {
3298 nes_debug(NES_DBG_CM, "Sending first write.\n");
3299 wqe = &nesqp->hwqp.sq_vbase[0];
3300 u64temp = (unsigned long)nesqp;
3301 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3302 set_wqe_64bit_value(wqe->wqe_words,
3303 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3304 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3305 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3306 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3307 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3308 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3309 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3310 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3312 if (nesqp->sq_kmapped) {
3313 nesqp->sq_kmapped = 0;
3314 kunmap(nesqp->page);
3317 /* use the reserved spot on the WQ for the extra first WQE */
3318 nesqp->nesqp_context->ird_ord_sizes &=
3319 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3320 NES_QPCONTEXT_ORDIRD_WRPDU |
3321 NES_QPCONTEXT_ORDIRD_ALSMM));
3322 nesqp->skip_lsmm = 1;
3323 nesqp->hwqp.sq_tail = 0;
3324 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3325 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3329 memset(&nes_quad, 0, sizeof(nes_quad));
3331 nes_quad.DstIpAdrIndex =
3332 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3333 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3334 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3336 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3337 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3338 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3340 /* Produce hash key */
3341 crc_value = get_crc_value(&nes_quad);
3342 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3343 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3344 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3346 nesqp->hte_index &= nesadapter->hte_index_mask;
3347 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3349 nesqp->ietf_frame = &cm_node->mpa_frame;
3350 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3351 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3353 /* notify OF layer we successfully created the requested connection */
3354 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3355 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3356 cm_event.provider_data = cm_id->provider_data;
3357 cm_event.local_addr.sin_family = AF_INET;
3358 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3359 cm_event.remote_addr = cm_id->remote_addr;
3361 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3362 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3364 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3365 ret = cm_id->event_handler(cm_id, &cm_event);
3366 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3369 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3370 "ret=%d\n", __func__, __LINE__, ret);
3371 attr.qp_state = IB_QPS_RTS;
3372 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3374 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3375 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3382 * cm_event_connect_error
3384 static void cm_event_connect_error(struct nes_cm_event *event)
3386 struct nes_qp *nesqp;
3387 struct iw_cm_id *cm_id;
3388 struct iw_cm_event cm_event;
3389 /* struct nes_cm_info cm_info; */
3392 if (!event->cm_node)
3395 cm_id = event->cm_node->cm_id;
3400 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3401 nesqp = cm_id->provider_data;
3407 /* notify OF layer about this connection error event */
3408 /* cm_id->rem_ref(cm_id); */
3409 nesqp->cm_id = NULL;
3410 cm_id->provider_data = NULL;
3411 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3412 cm_event.status = -ECONNRESET;
3413 cm_event.provider_data = cm_id->provider_data;
3414 cm_event.local_addr = cm_id->local_addr;
3415 cm_event.remote_addr = cm_id->remote_addr;
3416 cm_event.private_data = NULL;
3417 cm_event.private_data_len = 0;
3419 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3420 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3421 cm_event.remote_addr.sin_addr.s_addr);
3423 ret = cm_id->event_handler(cm_id, &cm_event);
3424 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3426 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3427 "ret=%d\n", __func__, __LINE__, ret);
3428 cm_id->rem_ref(cm_id);
3430 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3438 static void cm_event_reset(struct nes_cm_event *event)
3440 struct nes_qp *nesqp;
3441 struct iw_cm_id *cm_id;
3442 struct iw_cm_event cm_event;
3443 /* struct nes_cm_info cm_info; */
3446 if (!event->cm_node)
3449 if (!event->cm_node->cm_id)
3452 cm_id = event->cm_node->cm_id;
3454 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3455 nesqp = cm_id->provider_data;
3459 nesqp->cm_id = NULL;
3460 /* cm_id->provider_data = NULL; */
3461 cm_event.event = IW_CM_EVENT_DISCONNECT;
3462 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3463 cm_event.provider_data = cm_id->provider_data;
3464 cm_event.local_addr = cm_id->local_addr;
3465 cm_event.remote_addr = cm_id->remote_addr;
3466 cm_event.private_data = NULL;
3467 cm_event.private_data_len = 0;
3469 cm_id->add_ref(cm_id);
3470 ret = cm_id->event_handler(cm_id, &cm_event);
3471 atomic_inc(&cm_closes);
3472 cm_event.event = IW_CM_EVENT_CLOSE;
3473 cm_event.status = IW_CM_EVENT_STATUS_OK;
3474 cm_event.provider_data = cm_id->provider_data;
3475 cm_event.local_addr = cm_id->local_addr;
3476 cm_event.remote_addr = cm_id->remote_addr;
3477 cm_event.private_data = NULL;
3478 cm_event.private_data_len = 0;
3479 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3480 ret = cm_id->event_handler(cm_id, &cm_event);
3482 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3485 /* notify OF layer about this connection error event */
3486 cm_id->rem_ref(cm_id);
3495 static void cm_event_mpa_req(struct nes_cm_event *event)
3497 struct iw_cm_id *cm_id;
3498 struct iw_cm_event cm_event;
3500 struct nes_cm_node *cm_node;
3502 cm_node = event->cm_node;
3505 cm_id = cm_node->cm_id;
3507 atomic_inc(&cm_connect_reqs);
3508 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3509 cm_node, cm_id, jiffies);
3511 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3512 cm_event.status = IW_CM_EVENT_STATUS_OK;
3513 cm_event.provider_data = (void *)cm_node;
3515 cm_event.local_addr.sin_family = AF_INET;
3516 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3517 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3519 cm_event.remote_addr.sin_family = AF_INET;
3520 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3521 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3522 cm_event.private_data = cm_node->mpa_frame_buf;
3523 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3525 ret = cm_id->event_handler(cm_id, &cm_event);
3527 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3528 __func__, __LINE__, ret);
3533 static void cm_event_mpa_reject(struct nes_cm_event *event)
3535 struct iw_cm_id *cm_id;
3536 struct iw_cm_event cm_event;
3537 struct nes_cm_node *cm_node;
3540 cm_node = event->cm_node;
3543 cm_id = cm_node->cm_id;
3545 atomic_inc(&cm_connect_reqs);
3546 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3547 cm_node, cm_id, jiffies);
3549 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3550 cm_event.status = -ECONNREFUSED;
3551 cm_event.provider_data = cm_id->provider_data;
3553 cm_event.local_addr.sin_family = AF_INET;
3554 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3555 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3557 cm_event.remote_addr.sin_family = AF_INET;
3558 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3559 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3561 cm_event.private_data = cm_node->mpa_frame_buf;
3562 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3564 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3565 "remove_addr=%08x\n",
3566 cm_event.local_addr.sin_addr.s_addr,
3567 cm_event.remote_addr.sin_addr.s_addr);
3569 ret = cm_id->event_handler(cm_id, &cm_event);
3571 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3572 __func__, __LINE__, ret);
3578 static void nes_cm_event_handler(struct work_struct *);
3582 * post an event to the cm event handler
3584 static int nes_cm_post_event(struct nes_cm_event *event)
3586 atomic_inc(&event->cm_node->cm_core->events_posted);
3587 add_ref_cm_node(event->cm_node);
3588 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3589 INIT_WORK(&event->event_work, nes_cm_event_handler);
3590 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3591 event->cm_node, event);
3593 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3595 nes_debug(NES_DBG_CM, "Exit\n");
3601 * nes_cm_event_handler
3602 * worker function to handle cm events
3603 * will free instance of nes_cm_event
3605 static void nes_cm_event_handler(struct work_struct *work)
3607 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3609 struct nes_cm_core *cm_core;
3611 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3614 cm_core = event->cm_node->cm_core;
3615 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3616 event, event->type, atomic_read(&cm_core->events_posted));
3618 switch (event->type) {
3619 case NES_CM_EVENT_MPA_REQ:
3620 cm_event_mpa_req(event);
3621 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3624 case NES_CM_EVENT_RESET:
3625 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3627 cm_event_reset(event);
3629 case NES_CM_EVENT_CONNECTED:
3630 if ((!event->cm_node->cm_id) ||
3631 (event->cm_node->state != NES_CM_STATE_TSA))
3633 cm_event_connected(event);
3634 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3636 case NES_CM_EVENT_MPA_REJECT:
3637 if ((!event->cm_node->cm_id) ||
3638 (event->cm_node->state == NES_CM_STATE_TSA))
3640 cm_event_mpa_reject(event);
3641 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3644 case NES_CM_EVENT_ABORTED:
3645 if ((!event->cm_node->cm_id) ||
3646 (event->cm_node->state == NES_CM_STATE_TSA))
3648 cm_event_connect_error(event);
3649 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3651 case NES_CM_EVENT_DROPPED_PKT:
3652 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3655 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3659 atomic_dec(&cm_core->events_posted);
3660 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3661 rem_ref_cm_node(cm_core, event->cm_node);