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, int arpindex)
1105 struct neighbour *neigh;
1107 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1109 memset(&fl, 0, sizeof fl);
1110 fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1111 if (ip_route_output_key(&init_net, &rt, &fl)) {
1112 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1117 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1119 if (neigh->nud_state & NUD_VALID) {
1120 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1121 " is %pM, Gateway is 0x%08X \n", dst_ip,
1122 neigh->ha, ntohl(rt->rt_gateway));
1124 if (arpindex >= 0) {
1125 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1126 neigh->ha, ETH_ALEN)){
1127 /* Mac address same as in nes_arp_table */
1128 neigh_release(neigh);
1133 nes_manage_arp_cache(nesvnic->netdev,
1134 nesadapter->arp_table[arpindex].mac_addr,
1135 dst_ip, NES_ARP_DELETE);
1138 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1139 dst_ip, NES_ARP_ADD);
1140 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1143 neigh_release(neigh);
1146 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1147 neigh_event_send(rt->u.dst.neighbour, NULL);
1154 * make_cm_node - create a new instance of a cm node
1156 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1157 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1158 struct nes_cm_listener *listener)
1160 struct nes_cm_node *cm_node;
1162 int oldarpindex = 0;
1164 struct nes_device *nesdev;
1165 struct nes_adapter *nesadapter;
1167 /* create an hte and cm_node for this instance */
1168 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1172 /* set our node specific transport info */
1173 cm_node->loc_addr = cm_info->loc_addr;
1174 cm_node->rem_addr = cm_info->rem_addr;
1175 cm_node->loc_port = cm_info->loc_port;
1176 cm_node->rem_port = cm_info->rem_port;
1177 cm_node->send_write0 = send_first;
1178 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1179 &cm_node->loc_addr, cm_node->loc_port,
1180 &cm_node->rem_addr, cm_node->rem_port);
1181 cm_node->listener = listener;
1182 cm_node->netdev = nesvnic->netdev;
1183 cm_node->cm_id = cm_info->cm_id;
1184 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1186 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1189 spin_lock_init(&cm_node->retrans_list_lock);
1191 cm_node->loopbackpartner = NULL;
1192 atomic_set(&cm_node->ref_count, 1);
1193 /* associate our parent CM core */
1194 cm_node->cm_core = cm_core;
1195 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1196 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1197 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1198 NES_CM_DEFAULT_RCV_WND_SCALE;
1199 ts = current_kernel_time();
1200 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1201 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1202 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1203 cm_node->tcp_cntxt.rcv_nxt = 0;
1204 /* get a unique session ID , add thread_id to an upcounter to handle race */
1205 atomic_inc(&cm_core->node_cnt);
1206 cm_node->conn_type = cm_info->conn_type;
1207 cm_node->apbvt_set = 0;
1208 cm_node->accept_pend = 0;
1210 cm_node->nesvnic = nesvnic;
1211 /* get some device handles, for arp lookup */
1212 nesdev = nesvnic->nesdev;
1213 nesadapter = nesdev->nesadapter;
1215 cm_node->loopbackpartner = NULL;
1217 /* get the mac addr for the remote node */
1218 if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1219 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1221 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1222 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1230 /* copy the mac addr to node context */
1231 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1232 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1235 add_hte_node(cm_core, cm_node);
1236 atomic_inc(&cm_nodes_created);
1243 * add_ref_cm_node - destroy an instance of a cm node
1245 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1247 atomic_inc(&cm_node->ref_count);
1253 * rem_ref_cm_node - destroy an instance of a cm node
1255 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1256 struct nes_cm_node *cm_node)
1258 unsigned long flags;
1259 struct nes_qp *nesqp;
1264 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1265 if (atomic_dec_return(&cm_node->ref_count)) {
1266 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1269 list_del(&cm_node->list);
1270 atomic_dec(&cm_core->ht_node_cnt);
1271 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1273 /* if the node is destroyed before connection was accelerated */
1274 if (!cm_node->accelerated && cm_node->accept_pend) {
1275 BUG_ON(!cm_node->listener);
1276 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1277 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1279 WARN_ON(cm_node->send_entry);
1280 if (cm_node->recv_entry)
1281 handle_recv_entry(cm_node, 0);
1282 if (cm_node->listener) {
1283 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1285 if (cm_node->apbvt_set && cm_node->nesvnic) {
1286 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1288 cm_node->nesvnic->nesdev->pcidev->devfn),
1289 NES_MANAGE_APBVT_DEL);
1293 atomic_dec(&cm_core->node_cnt);
1294 atomic_inc(&cm_nodes_destroyed);
1295 nesqp = cm_node->nesqp;
1297 nesqp->cm_node = NULL;
1298 nes_rem_ref(&nesqp->ibqp);
1299 cm_node->nesqp = NULL;
1309 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1310 u32 optionsize, u32 syn_packet)
1314 union all_known_options *all_options;
1315 char got_mss_option = 0;
1317 while (offset < optionsize) {
1318 all_options = (union all_known_options *)(optionsloc + offset);
1319 switch (all_options->as_base.optionnum) {
1320 case OPTION_NUMBER_END:
1321 offset = optionsize;
1323 case OPTION_NUMBER_NONE:
1326 case OPTION_NUMBER_MSS:
1327 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1328 "Size: %d\n", __func__,
1329 all_options->as_mss.length, offset, optionsize);
1331 if (all_options->as_mss.length != 4) {
1334 tmp = ntohs(all_options->as_mss.mss);
1335 if (tmp > 0 && tmp <
1336 cm_node->tcp_cntxt.mss)
1337 cm_node->tcp_cntxt.mss = tmp;
1340 case OPTION_NUMBER_WINDOW_SCALE:
1341 cm_node->tcp_cntxt.snd_wscale =
1342 all_options->as_windowscale.shiftcount;
1344 case OPTION_NUMBER_WRITE0:
1345 cm_node->send_write0 = 1;
1348 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1349 all_options->as_base.optionnum);
1352 offset += all_options->as_base.length;
1354 if ((!got_mss_option) && (syn_packet))
1355 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1359 static void drop_packet(struct sk_buff *skb)
1361 atomic_inc(&cm_accel_dropped_pkts);
1362 dev_kfree_skb_any(skb);
1365 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1367 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1368 "refcnt=%d\n", cm_node, cm_node->state,
1369 atomic_read(&cm_node->ref_count));
1370 switch (cm_node->state) {
1371 case NES_CM_STATE_SYN_RCVD:
1372 case NES_CM_STATE_SYN_SENT:
1373 case NES_CM_STATE_ESTABLISHED:
1374 case NES_CM_STATE_MPAREJ_RCVD:
1375 cm_node->tcp_cntxt.rcv_nxt++;
1376 cleanup_retrans_entry(cm_node);
1377 cm_node->state = NES_CM_STATE_LAST_ACK;
1378 send_fin(cm_node, NULL);
1380 case NES_CM_STATE_MPAREQ_SENT:
1381 create_event(cm_node, NES_CM_EVENT_ABORTED);
1382 cm_node->tcp_cntxt.rcv_nxt++;
1383 cleanup_retrans_entry(cm_node);
1384 cm_node->state = NES_CM_STATE_CLOSED;
1385 add_ref_cm_node(cm_node);
1386 send_reset(cm_node, NULL);
1388 case NES_CM_STATE_FIN_WAIT1:
1389 cm_node->tcp_cntxt.rcv_nxt++;
1390 cleanup_retrans_entry(cm_node);
1391 cm_node->state = NES_CM_STATE_CLOSING;
1392 send_ack(cm_node, NULL);
1393 /* Wait for ACK as this is simultanous close..
1394 * After we receive ACK, do not send anything..
1395 * Just rm the node.. Done.. */
1397 case NES_CM_STATE_FIN_WAIT2:
1398 cm_node->tcp_cntxt.rcv_nxt++;
1399 cleanup_retrans_entry(cm_node);
1400 cm_node->state = NES_CM_STATE_TIME_WAIT;
1401 send_ack(cm_node, NULL);
1402 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1404 case NES_CM_STATE_TIME_WAIT:
1405 cm_node->tcp_cntxt.rcv_nxt++;
1406 cleanup_retrans_entry(cm_node);
1407 cm_node->state = NES_CM_STATE_CLOSED;
1408 rem_ref_cm_node(cm_node->cm_core, cm_node);
1410 case NES_CM_STATE_TSA:
1412 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1413 cm_node, cm_node->state);
1419 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1420 struct tcphdr *tcph)
1423 int reset = 0; /* whether to send reset in case of err.. */
1425 atomic_inc(&cm_resets_recvd);
1426 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1427 " refcnt=%d\n", cm_node, cm_node->state,
1428 atomic_read(&cm_node->ref_count));
1429 cleanup_retrans_entry(cm_node);
1430 switch (cm_node->state) {
1431 case NES_CM_STATE_SYN_SENT:
1432 case NES_CM_STATE_MPAREQ_SENT:
1433 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1434 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1435 cm_node->listener, cm_node->state);
1436 active_open_err(cm_node, skb, reset);
1438 case NES_CM_STATE_MPAREQ_RCVD:
1439 passive_state = atomic_add_return(1, &cm_node->passive_state);
1440 if (passive_state == NES_SEND_RESET_EVENT)
1441 create_event(cm_node, NES_CM_EVENT_RESET);
1442 cm_node->state = NES_CM_STATE_CLOSED;
1443 dev_kfree_skb_any(skb);
1445 case NES_CM_STATE_ESTABLISHED:
1446 case NES_CM_STATE_SYN_RCVD:
1447 case NES_CM_STATE_LISTENING:
1448 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1449 passive_open_err(cm_node, skb, reset);
1451 case NES_CM_STATE_TSA:
1452 active_open_err(cm_node, skb, reset);
1454 case NES_CM_STATE_CLOSED:
1457 case NES_CM_STATE_FIN_WAIT1:
1458 case NES_CM_STATE_LAST_ACK:
1459 cm_node->cm_id->rem_ref(cm_node->cm_id);
1460 case NES_CM_STATE_TIME_WAIT:
1461 cm_node->state = NES_CM_STATE_CLOSED;
1462 rem_ref_cm_node(cm_node->cm_core, cm_node);
1472 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1476 int datasize = skb->len;
1477 u8 *dataloc = skb->data;
1479 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1481 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1483 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1484 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1485 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1486 "cm_node=%p listener=%p state=%d\n", __func__,
1487 __LINE__, cm_node, cm_node->listener,
1489 active_open_err(cm_node, skb, 1);
1491 passive_open_err(cm_node, skb, 1);
1496 switch (cm_node->state) {
1497 case NES_CM_STATE_ESTABLISHED:
1498 if (res_type == NES_MPA_REQUEST_REJECT) {
1499 /*BIG problem as we are receiving the MPA.. So should
1500 * not be REJECT.. This is Passive Open.. We can
1501 * only receive it Reject for Active Open...*/
1504 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1505 type = NES_CM_EVENT_MPA_REQ;
1506 atomic_set(&cm_node->passive_state,
1507 NES_PASSIVE_STATE_INDICATED);
1509 case NES_CM_STATE_MPAREQ_SENT:
1510 cleanup_retrans_entry(cm_node);
1511 if (res_type == NES_MPA_REQUEST_REJECT) {
1512 type = NES_CM_EVENT_MPA_REJECT;
1513 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1515 type = NES_CM_EVENT_CONNECTED;
1516 cm_node->state = NES_CM_STATE_TSA;
1524 dev_kfree_skb_any(skb);
1525 create_event(cm_node, type);
1528 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1530 switch (cm_node->state) {
1531 case NES_CM_STATE_SYN_SENT:
1532 case NES_CM_STATE_MPAREQ_SENT:
1533 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1534 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1535 cm_node->listener, cm_node->state);
1536 active_open_err(cm_node, skb, 1);
1538 case NES_CM_STATE_ESTABLISHED:
1539 case NES_CM_STATE_SYN_RCVD:
1540 passive_open_err(cm_node, skb, 1);
1542 case NES_CM_STATE_TSA:
1548 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1549 struct sk_buff *skb)
1553 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1555 active_open_err(cm_node, skb, 1);
1560 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1561 struct sk_buff *skb)
1566 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1567 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1569 seq = ntohl(tcph->seq);
1570 ack_seq = ntohl(tcph->ack_seq);
1571 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1572 if (ack_seq != loc_seq_num)
1574 else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
1577 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1578 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1579 cm_node->listener, cm_node->state);
1580 indicate_pkt_err(cm_node, skb);
1581 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1582 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1589 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1590 * is created with a listener or it may comein as rexmitted packet which in
1591 * that case will be just dropped.
1594 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1595 struct tcphdr *tcph)
1601 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1603 inc_sequence = ntohl(tcph->seq);
1605 switch (cm_node->state) {
1606 case NES_CM_STATE_SYN_SENT:
1607 case NES_CM_STATE_MPAREQ_SENT:
1608 /* Rcvd syn on active open connection*/
1609 active_open_err(cm_node, skb, 1);
1611 case NES_CM_STATE_LISTENING:
1613 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1614 cm_node->listener->backlog) {
1615 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1618 passive_open_err(cm_node, skb, 0);
1621 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1624 passive_open_err(cm_node, skb, 0);
1628 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1629 BUG_ON(cm_node->send_entry);
1630 cm_node->accept_pend = 1;
1631 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1633 cm_node->state = NES_CM_STATE_SYN_RCVD;
1634 send_syn(cm_node, 1, skb);
1636 case NES_CM_STATE_CLOSED:
1637 cleanup_retrans_entry(cm_node);
1638 add_ref_cm_node(cm_node);
1639 send_reset(cm_node, skb);
1641 case NES_CM_STATE_TSA:
1642 case NES_CM_STATE_ESTABLISHED:
1643 case NES_CM_STATE_FIN_WAIT1:
1644 case NES_CM_STATE_FIN_WAIT2:
1645 case NES_CM_STATE_MPAREQ_RCVD:
1646 case NES_CM_STATE_LAST_ACK:
1647 case NES_CM_STATE_CLOSING:
1648 case NES_CM_STATE_UNKNOWN:
1655 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1656 struct tcphdr *tcph)
1663 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1665 inc_sequence = ntohl(tcph->seq);
1666 switch (cm_node->state) {
1667 case NES_CM_STATE_SYN_SENT:
1668 cleanup_retrans_entry(cm_node);
1670 if (check_syn(cm_node, tcph, skb))
1672 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1674 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1676 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1680 cleanup_retrans_entry(cm_node);
1681 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1682 send_mpa_request(cm_node, skb);
1683 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1685 case NES_CM_STATE_MPAREQ_RCVD:
1686 /* passive open, so should not be here */
1687 passive_open_err(cm_node, skb, 1);
1689 case NES_CM_STATE_LISTENING:
1690 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1691 cleanup_retrans_entry(cm_node);
1692 cm_node->state = NES_CM_STATE_CLOSED;
1693 send_reset(cm_node, skb);
1695 case NES_CM_STATE_CLOSED:
1696 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1697 cleanup_retrans_entry(cm_node);
1698 add_ref_cm_node(cm_node);
1699 send_reset(cm_node, skb);
1701 case NES_CM_STATE_ESTABLISHED:
1702 case NES_CM_STATE_FIN_WAIT1:
1703 case NES_CM_STATE_FIN_WAIT2:
1704 case NES_CM_STATE_LAST_ACK:
1705 case NES_CM_STATE_TSA:
1706 case NES_CM_STATE_CLOSING:
1707 case NES_CM_STATE_UNKNOWN:
1708 case NES_CM_STATE_MPAREQ_SENT:
1715 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1716 struct tcphdr *tcph)
1724 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1726 if (check_seq(cm_node, tcph, skb))
1729 skb_pull(skb, tcph->doff << 2);
1730 inc_sequence = ntohl(tcph->seq);
1731 rem_seq = ntohl(tcph->seq);
1732 rem_seq_ack = ntohl(tcph->ack_seq);
1733 datasize = skb->len;
1734 switch (cm_node->state) {
1735 case NES_CM_STATE_SYN_RCVD:
1737 cleanup_retrans_entry(cm_node);
1738 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1741 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1742 cm_node->state = NES_CM_STATE_ESTABLISHED;
1744 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1745 handle_rcv_mpa(cm_node, skb);
1746 } else /* rcvd ACK only */
1747 dev_kfree_skb_any(skb);
1749 case NES_CM_STATE_ESTABLISHED:
1751 cleanup_retrans_entry(cm_node);
1753 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1754 handle_rcv_mpa(cm_node, skb);
1758 case NES_CM_STATE_MPAREQ_SENT:
1759 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1761 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1762 handle_rcv_mpa(cm_node, skb);
1763 } else /* Could be just an ack pkt.. */
1764 dev_kfree_skb_any(skb);
1766 case NES_CM_STATE_LISTENING:
1767 cleanup_retrans_entry(cm_node);
1768 cm_node->state = NES_CM_STATE_CLOSED;
1769 send_reset(cm_node, skb);
1771 case NES_CM_STATE_CLOSED:
1772 cleanup_retrans_entry(cm_node);
1773 add_ref_cm_node(cm_node);
1774 send_reset(cm_node, skb);
1776 case NES_CM_STATE_LAST_ACK:
1777 case NES_CM_STATE_CLOSING:
1778 cleanup_retrans_entry(cm_node);
1779 cm_node->state = NES_CM_STATE_CLOSED;
1780 cm_node->cm_id->rem_ref(cm_node->cm_id);
1781 rem_ref_cm_node(cm_node->cm_core, cm_node);
1784 case NES_CM_STATE_FIN_WAIT1:
1785 cleanup_retrans_entry(cm_node);
1787 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1789 case NES_CM_STATE_SYN_SENT:
1790 case NES_CM_STATE_FIN_WAIT2:
1791 case NES_CM_STATE_TSA:
1792 case NES_CM_STATE_MPAREQ_RCVD:
1793 case NES_CM_STATE_UNKNOWN:
1795 cleanup_retrans_entry(cm_node);
1804 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1805 struct sk_buff *skb, int optionsize, int passive)
1807 u8 *optionsloc = (u8 *)&tcph[1];
1809 if (process_options(cm_node, optionsloc, optionsize,
1811 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1814 passive_open_err(cm_node, skb, 1);
1816 active_open_err(cm_node, skb, 1);
1821 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1822 cm_node->tcp_cntxt.snd_wscale;
1824 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1825 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1830 * active_open_err() will send reset() if flag set..
1831 * It will also send ABORT event.
1834 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1837 cleanup_retrans_entry(cm_node);
1839 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1840 "state=%d\n", cm_node, cm_node->state);
1841 add_ref_cm_node(cm_node);
1842 send_reset(cm_node, skb);
1844 dev_kfree_skb_any(skb);
1846 cm_node->state = NES_CM_STATE_CLOSED;
1847 create_event(cm_node, NES_CM_EVENT_ABORTED);
1851 * passive_open_err() will either do a reset() or will free up the skb and
1852 * remove the cm_node.
1855 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1858 cleanup_retrans_entry(cm_node);
1859 cm_node->state = NES_CM_STATE_CLOSED;
1861 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1862 "cm_node=%p state =%d\n", cm_node, cm_node->state);
1863 send_reset(cm_node, skb);
1865 dev_kfree_skb_any(skb);
1866 rem_ref_cm_node(cm_node->cm_core, cm_node);
1871 * free_retrans_entry() routines assumes that the retrans_list_lock has
1872 * been acquired before calling.
1874 static void free_retrans_entry(struct nes_cm_node *cm_node)
1876 struct nes_timer_entry *send_entry;
1877 send_entry = cm_node->send_entry;
1879 cm_node->send_entry = NULL;
1880 dev_kfree_skb_any(send_entry->skb);
1882 rem_ref_cm_node(cm_node->cm_core, cm_node);
1886 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1888 unsigned long flags;
1890 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1891 free_retrans_entry(cm_node);
1892 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1897 * Returns skb if to be freed, else it will return NULL if already used..
1899 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1900 struct nes_cm_core *cm_core)
1902 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1903 struct tcphdr *tcph = tcp_hdr(skb);
1906 skb_pull(skb, ip_hdr(skb)->ihl << 2);
1908 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1909 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1910 tcph->ack, tcph->rst, tcph->fin);
1913 pkt_type = NES_PKT_TYPE_RST;
1914 else if (tcph->syn) {
1915 pkt_type = NES_PKT_TYPE_SYN;
1917 pkt_type = NES_PKT_TYPE_SYNACK;
1918 } else if (tcph->ack)
1919 pkt_type = NES_PKT_TYPE_ACK;
1924 case NES_PKT_TYPE_SYN:
1925 handle_syn_pkt(cm_node, skb, tcph);
1927 case NES_PKT_TYPE_SYNACK:
1928 handle_synack_pkt(cm_node, skb, tcph);
1930 case NES_PKT_TYPE_ACK:
1931 ret = handle_ack_pkt(cm_node, skb, tcph);
1932 if (fin_set && !ret)
1933 handle_fin_pkt(cm_node);
1935 case NES_PKT_TYPE_RST:
1936 handle_rst_pkt(cm_node, skb, tcph);
1939 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
1940 handle_fin_pkt(cm_node);
1947 * mini_cm_listen - create a listen node with params
1949 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1950 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1952 struct nes_cm_listener *listener;
1953 unsigned long flags;
1955 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1956 cm_info->loc_addr, cm_info->loc_port);
1958 /* cannot have multiple matching listeners */
1959 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1960 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1961 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1962 /* find automatically incs ref count ??? */
1963 atomic_dec(&listener->ref_count);
1964 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1969 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1970 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1972 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1976 listener->loc_addr = htonl(cm_info->loc_addr);
1977 listener->loc_port = htons(cm_info->loc_port);
1978 listener->reused_node = 0;
1980 atomic_set(&listener->ref_count, 1);
1983 /* find already inc'ed the ref count */
1985 listener->reused_node = 1;
1988 listener->cm_id = cm_info->cm_id;
1989 atomic_set(&listener->pend_accepts_cnt, 0);
1990 listener->cm_core = cm_core;
1991 listener->nesvnic = nesvnic;
1992 atomic_inc(&cm_core->node_cnt);
1994 listener->conn_type = cm_info->conn_type;
1995 listener->backlog = cm_info->backlog;
1996 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1998 if (!listener->reused_node) {
1999 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2000 list_add(&listener->list, &cm_core->listen_list.list);
2001 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2002 atomic_inc(&cm_core->listen_node_cnt);
2005 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2006 " listener = %p, backlog = %d, cm_id = %p.\n",
2007 cm_info->loc_addr, cm_info->loc_port,
2008 listener, listener->backlog, listener->cm_id);
2015 * mini_cm_connect - make a connection node with params
2017 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2018 struct nes_vnic *nesvnic, u16 private_data_len,
2019 void *private_data, struct nes_cm_info *cm_info)
2022 struct nes_cm_node *cm_node;
2023 struct nes_cm_listener *loopbackremotelistener;
2024 struct nes_cm_node *loopbackremotenode;
2025 struct nes_cm_info loopback_cm_info;
2026 u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
2027 struct ietf_mpa_frame *mpa_frame = NULL;
2029 /* create a CM connection node */
2030 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2033 mpa_frame = &cm_node->mpa_frame;
2034 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
2035 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2036 mpa_frame->rev = IETF_MPA_VERSION;
2037 mpa_frame->priv_data_len = htons(private_data_len);
2039 /* set our node side to client (active) side */
2040 cm_node->tcp_cntxt.client = 1;
2041 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2043 if (cm_info->loc_addr == cm_info->rem_addr) {
2044 loopbackremotelistener = find_listener(cm_core,
2045 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2046 NES_CM_LISTENER_ACTIVE_STATE);
2047 if (loopbackremotelistener == NULL) {
2048 create_event(cm_node, NES_CM_EVENT_ABORTED);
2050 loopback_cm_info = *cm_info;
2051 loopback_cm_info.loc_port = cm_info->rem_port;
2052 loopback_cm_info.rem_port = cm_info->loc_port;
2053 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2054 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2055 &loopback_cm_info, loopbackremotelistener);
2056 if (!loopbackremotenode) {
2057 rem_ref_cm_node(cm_node->cm_core, cm_node);
2060 atomic_inc(&cm_loopbacks);
2061 loopbackremotenode->loopbackpartner = cm_node;
2062 loopbackremotenode->tcp_cntxt.rcv_wscale =
2063 NES_CM_DEFAULT_RCV_WND_SCALE;
2064 cm_node->loopbackpartner = loopbackremotenode;
2065 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2067 loopbackremotenode->mpa_frame_size = private_data_len;
2069 /* we are done handling this state. */
2070 /* set node to a TSA state */
2071 cm_node->state = NES_CM_STATE_TSA;
2072 cm_node->tcp_cntxt.rcv_nxt =
2073 loopbackremotenode->tcp_cntxt.loc_seq_num;
2074 loopbackremotenode->tcp_cntxt.rcv_nxt =
2075 cm_node->tcp_cntxt.loc_seq_num;
2076 cm_node->tcp_cntxt.max_snd_wnd =
2077 loopbackremotenode->tcp_cntxt.rcv_wnd;
2078 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2079 cm_node->tcp_cntxt.rcv_wnd;
2080 cm_node->tcp_cntxt.snd_wnd =
2081 loopbackremotenode->tcp_cntxt.rcv_wnd;
2082 loopbackremotenode->tcp_cntxt.snd_wnd =
2083 cm_node->tcp_cntxt.rcv_wnd;
2084 cm_node->tcp_cntxt.snd_wscale =
2085 loopbackremotenode->tcp_cntxt.rcv_wscale;
2086 loopbackremotenode->tcp_cntxt.snd_wscale =
2087 cm_node->tcp_cntxt.rcv_wscale;
2088 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2089 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2094 /* set our node side to client (active) side */
2095 cm_node->tcp_cntxt.client = 1;
2096 /* init our MPA frame ptr */
2097 memcpy(mpa_frame->priv_data, private_data, private_data_len);
2099 cm_node->mpa_frame_size = mpa_frame_size;
2101 /* send a syn and goto syn sent state */
2102 cm_node->state = NES_CM_STATE_SYN_SENT;
2103 ret = send_syn(cm_node, 0, NULL);
2106 /* error in sending the syn free up the cm_node struct */
2107 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2108 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2109 cm_node->rem_addr, cm_node->rem_port, cm_node,
2111 rem_ref_cm_node(cm_node->cm_core, cm_node);
2116 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2117 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2118 cm_node->rem_addr, cm_node->rem_port, cm_node,
2126 * mini_cm_accept - accept a connection
2127 * This function is never called
2129 static int mini_cm_accept(struct nes_cm_core *cm_core,
2130 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2137 * mini_cm_reject - reject and teardown a connection
2139 static int mini_cm_reject(struct nes_cm_core *cm_core,
2140 struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2145 struct nes_cm_event event;
2146 struct iw_cm_id *cm_id = cm_node->cm_id;
2147 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2149 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2150 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2152 if (cm_node->tcp_cntxt.client)
2154 cleanup_retrans_entry(cm_node);
2157 passive_state = atomic_add_return(1, &cm_node->passive_state);
2158 if (passive_state == NES_SEND_RESET_EVENT) {
2159 cm_node->state = NES_CM_STATE_CLOSED;
2160 rem_ref_cm_node(cm_core, cm_node);
2162 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2163 rem_ref_cm_node(cm_core, cm_node);
2165 ret = send_mpa_reject(cm_node);
2167 cm_node->state = NES_CM_STATE_CLOSED;
2168 err = send_reset(cm_node, NULL);
2172 cm_id->add_ref(cm_id);
2176 cm_node->cm_id = NULL;
2177 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2178 rem_ref_cm_node(cm_core, cm_node);
2179 rem_ref_cm_node(cm_core, loopback);
2181 event.cm_node = loopback;
2182 event.cm_info.rem_addr = loopback->rem_addr;
2183 event.cm_info.loc_addr = loopback->loc_addr;
2184 event.cm_info.rem_port = loopback->rem_port;
2185 event.cm_info.loc_port = loopback->loc_port;
2186 event.cm_info.cm_id = loopback->cm_id;
2187 cm_event_mpa_reject(&event);
2188 rem_ref_cm_node(cm_core, cm_node);
2189 loopback->state = NES_CM_STATE_CLOSING;
2191 cm_id = loopback->cm_id;
2192 rem_ref_cm_node(cm_core, loopback);
2193 cm_id->rem_ref(cm_id);
2204 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2208 if (!cm_core || !cm_node)
2211 switch (cm_node->state) {
2212 case NES_CM_STATE_SYN_RCVD:
2213 case NES_CM_STATE_SYN_SENT:
2214 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2215 case NES_CM_STATE_ESTABLISHED:
2216 case NES_CM_STATE_ACCEPTING:
2217 case NES_CM_STATE_MPAREQ_SENT:
2218 case NES_CM_STATE_MPAREQ_RCVD:
2219 cleanup_retrans_entry(cm_node);
2220 send_reset(cm_node, NULL);
2222 case NES_CM_STATE_CLOSE_WAIT:
2223 cm_node->state = NES_CM_STATE_LAST_ACK;
2224 send_fin(cm_node, NULL);
2226 case NES_CM_STATE_FIN_WAIT1:
2227 case NES_CM_STATE_FIN_WAIT2:
2228 case NES_CM_STATE_LAST_ACK:
2229 case NES_CM_STATE_TIME_WAIT:
2230 case NES_CM_STATE_CLOSING:
2233 case NES_CM_STATE_LISTENING:
2234 cleanup_retrans_entry(cm_node);
2235 send_reset(cm_node, NULL);
2237 case NES_CM_STATE_MPAREJ_RCVD:
2238 case NES_CM_STATE_UNKNOWN:
2239 case NES_CM_STATE_INITED:
2240 case NES_CM_STATE_CLOSED:
2241 case NES_CM_STATE_LISTENER_DESTROYED:
2242 ret = rem_ref_cm_node(cm_core, cm_node);
2244 case NES_CM_STATE_TSA:
2245 if (cm_node->send_entry)
2246 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2247 "send_entry=%p\n", cm_node->send_entry);
2248 ret = rem_ref_cm_node(cm_core, cm_node);
2256 * recv_pkt - recv an ETHERNET packet, and process it through CM
2257 * node state machine
2259 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2260 struct nes_vnic *nesvnic, struct sk_buff *skb)
2262 struct nes_cm_node *cm_node = NULL;
2263 struct nes_cm_listener *listener = NULL;
2265 struct tcphdr *tcph;
2266 struct nes_cm_info nfo;
2267 int skb_handled = 1;
2268 __be32 tmp_daddr, tmp_saddr;
2272 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2276 iph = (struct iphdr *)skb->data;
2277 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2279 nfo.loc_addr = ntohl(iph->daddr);
2280 nfo.loc_port = ntohs(tcph->dest);
2281 nfo.rem_addr = ntohl(iph->saddr);
2282 nfo.rem_port = ntohs(tcph->source);
2284 tmp_daddr = cpu_to_be32(iph->daddr);
2285 tmp_saddr = cpu_to_be32(iph->saddr);
2287 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2288 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2291 cm_node = find_node(cm_core,
2292 nfo.rem_port, nfo.rem_addr,
2293 nfo.loc_port, nfo.loc_addr);
2296 /* Only type of packet accepted are for */
2297 /* the PASSIVE open (syn only) */
2298 if ((!tcph->syn) || (tcph->ack)) {
2302 listener = find_listener(cm_core, nfo.loc_addr,
2304 NES_CM_LISTENER_ACTIVE_STATE);
2308 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2312 nfo.cm_id = listener->cm_id;
2313 nfo.conn_type = listener->conn_type;
2314 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2317 nes_debug(NES_DBG_CM, "Unable to allocate "
2319 cm_packets_dropped++;
2320 atomic_dec(&listener->ref_count);
2321 dev_kfree_skb_any(skb);
2324 if (!tcph->rst && !tcph->fin) {
2325 cm_node->state = NES_CM_STATE_LISTENING;
2327 cm_packets_dropped++;
2328 rem_ref_cm_node(cm_core, cm_node);
2329 dev_kfree_skb_any(skb);
2332 add_ref_cm_node(cm_node);
2333 } else if (cm_node->state == NES_CM_STATE_TSA) {
2334 rem_ref_cm_node(cm_core, cm_node);
2335 atomic_inc(&cm_accel_dropped_pkts);
2336 dev_kfree_skb_any(skb);
2339 skb_reset_network_header(skb);
2340 skb_set_transport_header(skb, sizeof(*tcph));
2341 skb->len = ntohs(iph->tot_len);
2342 process_packet(cm_node, skb, cm_core);
2343 rem_ref_cm_node(cm_core, cm_node);
2350 * nes_cm_alloc_core - allocate a top level instance of a cm core
2352 static struct nes_cm_core *nes_cm_alloc_core(void)
2354 struct nes_cm_core *cm_core;
2356 /* setup the CM core */
2357 /* alloc top level core control structure */
2358 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2362 INIT_LIST_HEAD(&cm_core->connected_nodes);
2363 init_timer(&cm_core->tcp_timer);
2364 cm_core->tcp_timer.function = nes_cm_timer_tick;
2366 cm_core->mtu = NES_CM_DEFAULT_MTU;
2367 cm_core->state = NES_CM_STATE_INITED;
2368 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2370 atomic_set(&cm_core->events_posted, 0);
2372 cm_core->api = &nes_cm_api;
2374 spin_lock_init(&cm_core->ht_lock);
2375 spin_lock_init(&cm_core->listen_list_lock);
2377 INIT_LIST_HEAD(&cm_core->listen_list.list);
2379 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2381 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2382 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2383 cm_core->post_event = nes_cm_post_event;
2384 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2385 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2387 print_core(cm_core);
2393 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2395 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2397 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2404 if (timer_pending(&cm_core->tcp_timer)) {
2405 del_timer(&cm_core->tcp_timer);
2408 destroy_workqueue(cm_core->event_wq);
2409 destroy_workqueue(cm_core->disconn_wq);
2410 nes_debug(NES_DBG_CM, "\n");
2420 static int mini_cm_get(struct nes_cm_core *cm_core)
2422 return cm_core->state;
2429 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2434 case NES_CM_SET_PKT_SIZE:
2435 cm_core->mtu = value;
2437 case NES_CM_SET_FREE_PKT_Q_SIZE:
2438 cm_core->free_tx_pkt_max = value;
2441 /* unknown set option */
2450 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2451 * successfully exchanged when this is called
2453 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2460 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2461 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2462 NES_QPCONTEXT_MISC_DROS);
2464 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2465 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2467 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2469 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2471 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2472 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2474 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2475 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2476 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2478 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2479 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2480 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2482 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2483 nesqp->nesqp_context->ts_recent = 0;
2484 nesqp->nesqp_context->ts_age = 0;
2485 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2486 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2487 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2488 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2489 cm_node->tcp_cntxt.rcv_wscale);
2490 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2491 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2492 nesqp->nesqp_context->srtt = 0;
2493 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2494 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2495 nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2496 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2497 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2498 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2500 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2501 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2502 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2503 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2504 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2505 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2506 le32_to_cpu(nesqp->nesqp_context->misc));
2507 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2508 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2509 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2511 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2512 cm_node->state = NES_CM_STATE_TSA;
2521 int nes_cm_disconn(struct nes_qp *nesqp)
2523 struct disconn_work *work;
2525 work = kzalloc(sizeof *work, GFP_ATOMIC);
2527 return -ENOMEM; /* Timer will clean up */
2529 nes_add_ref(&nesqp->ibqp);
2530 work->nesqp = nesqp;
2531 INIT_WORK(&work->work, nes_disconnect_worker);
2532 queue_work(g_cm_core->disconn_wq, &work->work);
2538 * nes_disconnect_worker
2540 static void nes_disconnect_worker(struct work_struct *work)
2542 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2543 struct nes_qp *nesqp = dwork->nesqp;
2546 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2547 nesqp->last_aeq, nesqp->hwqp.qp_id);
2548 nes_cm_disconn_true(nesqp);
2549 nes_rem_ref(&nesqp->ibqp);
2554 * nes_cm_disconn_true
2556 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2558 unsigned long flags;
2560 struct iw_cm_id *cm_id;
2561 struct iw_cm_event cm_event;
2562 struct nes_vnic *nesvnic;
2564 u8 original_hw_tcp_state;
2565 u8 original_ibqp_state;
2566 enum iw_cm_event_type disconn_status = IW_CM_EVENT_STATUS_OK;
2567 int issue_disconn = 0;
2568 int issue_close = 0;
2569 int issue_flush = 0;
2570 u32 flush_q = NES_CQP_FLUSH_RQ;
2571 struct ib_event ibevent;
2574 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2578 spin_lock_irqsave(&nesqp->lock, flags);
2579 cm_id = nesqp->cm_id;
2580 /* make sure we havent already closed this connection */
2582 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2584 spin_unlock_irqrestore(&nesqp->lock, flags);
2588 nesvnic = to_nesvnic(nesqp->ibqp.device);
2589 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2591 original_hw_tcp_state = nesqp->hw_tcp_state;
2592 original_ibqp_state = nesqp->ibqp_state;
2593 last_ae = nesqp->last_aeq;
2595 if (nesqp->term_flags) {
2598 nesqp->cm_id = NULL;
2599 if (nesqp->flush_issued == 0) {
2600 nesqp->flush_issued = 1;
2603 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2604 ((original_ibqp_state == IB_QPS_RTS) &&
2605 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2607 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2608 disconn_status = IW_CM_EVENT_STATUS_RESET;
2611 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2612 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2613 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2614 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2616 nesqp->cm_id = NULL;
2617 if (nesqp->flush_issued == 0) {
2618 nesqp->flush_issued = 1;
2623 spin_unlock_irqrestore(&nesqp->lock, flags);
2625 if ((issue_flush) && (nesqp->destroyed == 0)) {
2626 /* Flush the queue(s) */
2627 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2628 flush_q |= NES_CQP_FLUSH_SQ;
2629 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2631 if (nesqp->term_flags) {
2632 ibevent.device = nesqp->ibqp.device;
2633 ibevent.event = nesqp->terminate_eventtype;
2634 ibevent.element.qp = &nesqp->ibqp;
2635 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2639 if ((cm_id) && (cm_id->event_handler)) {
2640 if (issue_disconn) {
2641 atomic_inc(&cm_disconnects);
2642 cm_event.event = IW_CM_EVENT_DISCONNECT;
2643 cm_event.status = disconn_status;
2644 cm_event.local_addr = cm_id->local_addr;
2645 cm_event.remote_addr = cm_id->remote_addr;
2646 cm_event.private_data = NULL;
2647 cm_event.private_data_len = 0;
2649 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2650 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2651 "cm_id = %p, refcount = %u.\n",
2652 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2653 nesqp->hwqp.sq_tail, cm_id,
2654 atomic_read(&nesqp->refcount));
2656 ret = cm_id->event_handler(cm_id, &cm_event);
2658 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2659 "returned, ret=%d\n", ret);
2663 atomic_inc(&cm_closes);
2664 nes_disconnect(nesqp, 1);
2666 cm_id->provider_data = nesqp;
2667 /* Send up the close complete event */
2668 cm_event.event = IW_CM_EVENT_CLOSE;
2669 cm_event.status = IW_CM_EVENT_STATUS_OK;
2670 cm_event.provider_data = cm_id->provider_data;
2671 cm_event.local_addr = cm_id->local_addr;
2672 cm_event.remote_addr = cm_id->remote_addr;
2673 cm_event.private_data = NULL;
2674 cm_event.private_data_len = 0;
2676 ret = cm_id->event_handler(cm_id, &cm_event);
2678 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2681 cm_id->rem_ref(cm_id);
2692 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2695 struct nes_vnic *nesvnic;
2696 struct nes_device *nesdev;
2697 struct nes_ib_device *nesibdev;
2699 nesvnic = to_nesvnic(nesqp->ibqp.device);
2703 nesdev = nesvnic->nesdev;
2704 nesibdev = nesvnic->nesibdev;
2706 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2707 atomic_read(&nesvnic->netdev->refcnt));
2709 if (nesqp->active_conn) {
2711 /* indicate this connection is NOT active */
2712 nesqp->active_conn = 0;
2714 /* Need to free the Last Streaming Mode Message */
2715 if (nesqp->ietf_frame) {
2717 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2718 pci_free_consistent(nesdev->pcidev,
2719 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2720 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2724 /* close the CM node down if it is still active */
2725 if (nesqp->cm_node) {
2726 nes_debug(NES_DBG_CM, "Call close API\n");
2728 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2738 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2742 struct nes_qp *nesqp;
2743 struct nes_vnic *nesvnic;
2744 struct nes_device *nesdev;
2745 struct nes_cm_node *cm_node;
2746 struct nes_adapter *adapter;
2747 struct ib_qp_attr attr;
2748 struct iw_cm_event cm_event;
2749 struct nes_hw_qp_wqe *wqe;
2750 struct nes_v4_quad nes_quad;
2754 struct nes_ib_device *nesibdev;
2755 struct ib_mr *ibmr = NULL;
2756 struct ib_phys_buf ibphysbuf;
2757 struct nes_pd *nespd;
2760 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2764 /* get all our handles */
2765 nesqp = to_nesqp(ibqp);
2766 nesvnic = to_nesvnic(nesqp->ibqp.device);
2767 nesdev = nesvnic->nesdev;
2768 adapter = nesdev->nesadapter;
2770 cm_node = (struct nes_cm_node *)cm_id->provider_data;
2771 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2772 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2773 nesvnic->netdev->name);
2775 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
2776 if (cm_node->loopbackpartner)
2777 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
2778 rem_ref_cm_node(cm_node->cm_core, cm_node);
2782 /* associate the node with the QP */
2783 nesqp->cm_node = (void *)cm_node;
2784 cm_node->nesqp = nesqp;
2786 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2787 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2788 atomic_inc(&cm_accepts);
2790 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2791 atomic_read(&nesvnic->netdev->refcnt));
2793 /* allocate the ietf frame and space for private data */
2794 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2795 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2796 &nesqp->ietf_frame_pbase);
2798 if (!nesqp->ietf_frame) {
2799 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2805 /* setup the MPA frame */
2806 nesqp->private_data_len = conn_param->private_data_len;
2807 memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2809 memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2810 conn_param->private_data_len);
2812 nesqp->ietf_frame->priv_data_len =
2813 cpu_to_be16(conn_param->private_data_len);
2814 nesqp->ietf_frame->rev = mpa_version;
2815 nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2817 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2818 wqe = &nesqp->hwqp.sq_vbase[0];
2820 if (cm_id->remote_addr.sin_addr.s_addr !=
2821 cm_id->local_addr.sin_addr.s_addr) {
2822 u64temp = (unsigned long)nesqp;
2823 nesibdev = nesvnic->nesibdev;
2824 nespd = nesqp->nespd;
2825 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2826 ibphysbuf.size = conn_param->private_data_len +
2827 sizeof(struct ietf_mpa_frame);
2828 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
2829 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2831 IB_ACCESS_LOCAL_WRITE,
2834 nes_debug(NES_DBG_CM, "Unable to register memory region"
2835 "for lSMM for cm_node = %p \n",
2837 pci_free_consistent(nesdev->pcidev,
2838 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2839 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2843 ibmr->pd = &nespd->ibpd;
2844 ibmr->device = nespd->ibpd.device;
2845 nesqp->lsmm_mr = ibmr;
2847 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2848 set_wqe_64bit_value(wqe->wqe_words,
2849 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2851 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2852 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2853 NES_IWARP_SQ_WQE_WRPDU);
2854 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2855 cpu_to_le32(conn_param->private_data_len +
2856 sizeof(struct ietf_mpa_frame));
2857 set_wqe_64bit_value(wqe->wqe_words,
2858 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
2859 (u64)(unsigned long)nesqp->ietf_frame);
2860 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2861 cpu_to_le32(conn_param->private_data_len +
2862 sizeof(struct ietf_mpa_frame));
2863 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
2864 if (nesqp->sq_kmapped) {
2865 nesqp->sq_kmapped = 0;
2866 kunmap(nesqp->page);
2869 nesqp->nesqp_context->ird_ord_sizes |=
2870 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2871 NES_QPCONTEXT_ORDIRD_WRPDU);
2873 nesqp->nesqp_context->ird_ord_sizes |=
2874 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
2876 nesqp->skip_lsmm = 1;
2879 /* Cache the cm_id in the qp */
2880 nesqp->cm_id = cm_id;
2881 cm_node->cm_id = cm_id;
2883 /* nesqp->cm_node = (void *)cm_id->provider_data; */
2884 cm_id->provider_data = nesqp;
2885 nesqp->active_conn = 0;
2887 if (cm_node->state == NES_CM_STATE_TSA)
2888 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2891 nes_cm_init_tsa_conn(nesqp, cm_node);
2893 nesqp->nesqp_context->tcpPorts[0] =
2894 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2895 nesqp->nesqp_context->tcpPorts[1] =
2896 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2898 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2899 nesqp->nesqp_context->ip0 =
2900 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2902 nesqp->nesqp_context->ip0 =
2903 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2905 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2906 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2907 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2909 nesqp->nesqp_context->arp_index_vlan |=
2910 cpu_to_le32(nes_arp_table(nesdev,
2911 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2912 NES_ARP_RESOLVE) << 16);
2914 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2915 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2917 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2919 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2920 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2921 nesqp->nesqp_context->ird_ord_sizes |=
2922 cpu_to_le32((u32)conn_param->ord);
2924 memset(&nes_quad, 0, sizeof(nes_quad));
2925 nes_quad.DstIpAdrIndex =
2926 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2927 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2928 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2930 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2931 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2932 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2934 /* Produce hash key */
2935 crc_value = get_crc_value(&nes_quad);
2936 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2937 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2938 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2940 nesqp->hte_index &= adapter->hte_index_mask;
2941 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2943 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2945 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2946 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2947 "private data length=%zu.\n", nesqp->hwqp.qp_id,
2948 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2949 ntohs(cm_id->remote_addr.sin_port),
2950 ntohl(cm_id->local_addr.sin_addr.s_addr),
2951 ntohs(cm_id->local_addr.sin_port),
2952 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2953 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2954 conn_param->private_data_len +
2955 sizeof(struct ietf_mpa_frame));
2958 /* notify OF layer that accept event was successful */
2959 cm_id->add_ref(cm_id);
2960 nes_add_ref(&nesqp->ibqp);
2962 cm_event.event = IW_CM_EVENT_ESTABLISHED;
2963 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2964 cm_event.provider_data = (void *)nesqp;
2965 cm_event.local_addr = cm_id->local_addr;
2966 cm_event.remote_addr = cm_id->remote_addr;
2967 cm_event.private_data = NULL;
2968 cm_event.private_data_len = 0;
2969 ret = cm_id->event_handler(cm_id, &cm_event);
2970 attr.qp_state = IB_QPS_RTS;
2971 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2972 if (cm_node->loopbackpartner) {
2973 cm_node->loopbackpartner->mpa_frame_size =
2974 nesqp->private_data_len;
2975 /* copy entire MPA frame to our cm_node's frame */
2976 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2977 nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2978 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2981 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2982 "ret=%d\n", __func__, __LINE__, ret);
2984 passive_state = atomic_add_return(1, &cm_node->passive_state);
2985 if (passive_state == NES_SEND_RESET_EVENT)
2986 create_event(cm_node, NES_CM_EVENT_RESET);
2994 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2996 struct nes_cm_node *cm_node;
2997 struct nes_cm_node *loopback;
2999 struct nes_cm_core *cm_core;
3001 atomic_inc(&cm_rejects);
3002 cm_node = (struct nes_cm_node *) cm_id->provider_data;
3003 loopback = cm_node->loopbackpartner;
3004 cm_core = cm_node->cm_core;
3005 cm_node->cm_id = cm_id;
3006 cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
3008 if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
3011 memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
3013 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3014 loopback->mpa_frame.priv_data_len = pdata_len;
3015 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
3018 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
3019 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
3022 cm_node->mpa_frame.rev = mpa_version;
3023 cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
3025 return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
3031 * setup and launch cm connect node
3033 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3036 struct nes_qp *nesqp;
3037 struct nes_vnic *nesvnic;
3038 struct nes_device *nesdev;
3039 struct nes_cm_node *cm_node;
3040 struct nes_cm_info cm_info;
3043 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3046 nesqp = to_nesqp(ibqp);
3049 nesvnic = to_nesvnic(nesqp->ibqp.device);
3052 nesdev = nesvnic->nesdev;
3056 if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3059 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3060 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3061 ntohl(nesvnic->local_ipaddr),
3062 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3063 ntohs(cm_id->remote_addr.sin_port),
3064 ntohl(cm_id->local_addr.sin_addr.s_addr),
3065 ntohs(cm_id->local_addr.sin_port));
3067 atomic_inc(&cm_connects);
3068 nesqp->active_conn = 1;
3070 /* cache the cm_id in the qp */
3071 nesqp->cm_id = cm_id;
3073 cm_id->provider_data = nesqp;
3075 nesqp->private_data_len = conn_param->private_data_len;
3076 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3077 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3078 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3079 conn_param->private_data_len);
3081 if (cm_id->local_addr.sin_addr.s_addr !=
3082 cm_id->remote_addr.sin_addr.s_addr) {
3083 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3084 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3088 /* set up the connection params for the node */
3089 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3090 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3091 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3092 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3093 cm_info.cm_id = cm_id;
3094 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3096 cm_id->add_ref(cm_id);
3098 /* create a connect CM node connection */
3099 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3100 conn_param->private_data_len, (void *)conn_param->private_data,
3104 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3105 PCI_FUNC(nesdev->pcidev->devfn),
3106 NES_MANAGE_APBVT_DEL);
3108 cm_id->rem_ref(cm_id);
3112 cm_node->apbvt_set = apbvt_set;
3113 nesqp->cm_node = cm_node;
3114 cm_node->nesqp = nesqp;
3115 nes_add_ref(&nesqp->ibqp);
3124 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3126 struct nes_vnic *nesvnic;
3127 struct nes_cm_listener *cm_node;
3128 struct nes_cm_info cm_info;
3129 struct nes_adapter *adapter;
3133 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3134 cm_id, ntohs(cm_id->local_addr.sin_port));
3136 nesvnic = to_nesvnic(cm_id->device);
3139 adapter = nesvnic->nesdev->nesadapter;
3140 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3141 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3143 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3144 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3146 /* setup listen params in our api call struct */
3147 cm_info.loc_addr = nesvnic->local_ipaddr;
3148 cm_info.loc_port = cm_id->local_addr.sin_port;
3149 cm_info.backlog = backlog;
3150 cm_info.cm_id = cm_id;
3152 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3155 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3157 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3158 __func__, __LINE__);
3162 cm_id->provider_data = cm_node;
3164 if (!cm_node->reused_node) {
3165 err = nes_manage_apbvt(nesvnic,
3166 ntohs(cm_id->local_addr.sin_port),
3167 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3168 NES_MANAGE_APBVT_ADD);
3170 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3172 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3175 cm_listens_created++;
3178 cm_id->add_ref(cm_id);
3179 cm_id->provider_data = (void *)cm_node;
3187 * nes_destroy_listen
3189 int nes_destroy_listen(struct iw_cm_id *cm_id)
3191 if (cm_id->provider_data)
3192 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3194 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3196 cm_id->rem_ref(cm_id);
3205 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3208 cm_packets_received++;
3209 if ((g_cm_core) && (g_cm_core->api)) {
3210 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3212 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3213 " cm is not setup properly.\n");
3222 * Start and init a cm core module
3224 int nes_cm_start(void)
3226 nes_debug(NES_DBG_CM, "\n");
3227 /* create the primary CM core, pass this handle to subsequent core inits */
3228 g_cm_core = nes_cm_alloc_core();
3239 * stop and dealloc all cm core instances
3241 int nes_cm_stop(void)
3243 g_cm_core->api->destroy_cm_core(g_cm_core);
3249 * cm_event_connected
3250 * handle a connected event, setup QPs and HW
3252 static void cm_event_connected(struct nes_cm_event *event)
3255 struct nes_qp *nesqp;
3256 struct nes_vnic *nesvnic;
3257 struct nes_device *nesdev;
3258 struct nes_cm_node *cm_node;
3259 struct nes_adapter *nesadapter;
3260 struct ib_qp_attr attr;
3261 struct iw_cm_id *cm_id;
3262 struct iw_cm_event cm_event;
3263 struct nes_hw_qp_wqe *wqe;
3264 struct nes_v4_quad nes_quad;
3268 /* get all our handles */
3269 cm_node = event->cm_node;
3270 cm_id = cm_node->cm_id;
3271 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3272 nesqp = (struct nes_qp *)cm_id->provider_data;
3273 nesvnic = to_nesvnic(nesqp->ibqp.device);
3274 nesdev = nesvnic->nesdev;
3275 nesadapter = nesdev->nesadapter;
3277 if (nesqp->destroyed) {
3280 atomic_inc(&cm_connecteds);
3281 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3282 " local port 0x%04X. jiffies = %lu.\n",
3284 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3285 ntohs(cm_id->remote_addr.sin_port),
3286 ntohs(cm_id->local_addr.sin_port),
3289 nes_cm_init_tsa_conn(nesqp, cm_node);
3291 /* set the QP tsa context */
3292 nesqp->nesqp_context->tcpPorts[0] =
3293 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3294 nesqp->nesqp_context->tcpPorts[1] =
3295 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3296 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3297 nesqp->nesqp_context->ip0 =
3298 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3300 nesqp->nesqp_context->ip0 =
3301 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3303 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3304 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3305 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3306 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3307 nes_arp_table(nesdev,
3308 le32_to_cpu(nesqp->nesqp_context->ip0),
3309 NULL, NES_ARP_RESOLVE) << 16);
3310 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3311 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3312 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3313 nesqp->nesqp_context->ird_ord_sizes |=
3314 cpu_to_le32((u32)1 <<
3315 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3317 /* Adjust tail for not having a LSMM */
3318 nesqp->hwqp.sq_tail = 1;
3320 #if defined(NES_SEND_FIRST_WRITE)
3321 if (cm_node->send_write0) {
3322 nes_debug(NES_DBG_CM, "Sending first write.\n");
3323 wqe = &nesqp->hwqp.sq_vbase[0];
3324 u64temp = (unsigned long)nesqp;
3325 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3326 set_wqe_64bit_value(wqe->wqe_words,
3327 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3328 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3329 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3330 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3331 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3332 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3333 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3334 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3336 if (nesqp->sq_kmapped) {
3337 nesqp->sq_kmapped = 0;
3338 kunmap(nesqp->page);
3341 /* use the reserved spot on the WQ for the extra first WQE */
3342 nesqp->nesqp_context->ird_ord_sizes &=
3343 cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3344 NES_QPCONTEXT_ORDIRD_WRPDU |
3345 NES_QPCONTEXT_ORDIRD_ALSMM));
3346 nesqp->skip_lsmm = 1;
3347 nesqp->hwqp.sq_tail = 0;
3348 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3349 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3353 memset(&nes_quad, 0, sizeof(nes_quad));
3355 nes_quad.DstIpAdrIndex =
3356 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3357 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3358 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3360 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3361 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3362 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3364 /* Produce hash key */
3365 crc_value = get_crc_value(&nes_quad);
3366 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3367 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3368 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3370 nesqp->hte_index &= nesadapter->hte_index_mask;
3371 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3373 nesqp->ietf_frame = &cm_node->mpa_frame;
3374 nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3375 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3377 /* notify OF layer we successfully created the requested connection */
3378 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3379 cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3380 cm_event.provider_data = cm_id->provider_data;
3381 cm_event.local_addr.sin_family = AF_INET;
3382 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3383 cm_event.remote_addr = cm_id->remote_addr;
3385 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3386 cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3388 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3389 ret = cm_id->event_handler(cm_id, &cm_event);
3390 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3393 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3394 "ret=%d\n", __func__, __LINE__, ret);
3395 attr.qp_state = IB_QPS_RTS;
3396 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3398 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3399 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3406 * cm_event_connect_error
3408 static void cm_event_connect_error(struct nes_cm_event *event)
3410 struct nes_qp *nesqp;
3411 struct iw_cm_id *cm_id;
3412 struct iw_cm_event cm_event;
3413 /* struct nes_cm_info cm_info; */
3416 if (!event->cm_node)
3419 cm_id = event->cm_node->cm_id;
3424 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3425 nesqp = cm_id->provider_data;
3431 /* notify OF layer about this connection error event */
3432 /* cm_id->rem_ref(cm_id); */
3433 nesqp->cm_id = NULL;
3434 cm_id->provider_data = NULL;
3435 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3436 cm_event.status = -ECONNRESET;
3437 cm_event.provider_data = cm_id->provider_data;
3438 cm_event.local_addr = cm_id->local_addr;
3439 cm_event.remote_addr = cm_id->remote_addr;
3440 cm_event.private_data = NULL;
3441 cm_event.private_data_len = 0;
3443 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3444 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3445 cm_event.remote_addr.sin_addr.s_addr);
3447 ret = cm_id->event_handler(cm_id, &cm_event);
3448 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3450 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3451 "ret=%d\n", __func__, __LINE__, ret);
3452 cm_id->rem_ref(cm_id);
3454 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3462 static void cm_event_reset(struct nes_cm_event *event)
3464 struct nes_qp *nesqp;
3465 struct iw_cm_id *cm_id;
3466 struct iw_cm_event cm_event;
3467 /* struct nes_cm_info cm_info; */
3470 if (!event->cm_node)
3473 if (!event->cm_node->cm_id)
3476 cm_id = event->cm_node->cm_id;
3478 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3479 nesqp = cm_id->provider_data;
3483 nesqp->cm_id = NULL;
3484 /* cm_id->provider_data = NULL; */
3485 cm_event.event = IW_CM_EVENT_DISCONNECT;
3486 cm_event.status = IW_CM_EVENT_STATUS_RESET;
3487 cm_event.provider_data = cm_id->provider_data;
3488 cm_event.local_addr = cm_id->local_addr;
3489 cm_event.remote_addr = cm_id->remote_addr;
3490 cm_event.private_data = NULL;
3491 cm_event.private_data_len = 0;
3493 cm_id->add_ref(cm_id);
3494 ret = cm_id->event_handler(cm_id, &cm_event);
3495 atomic_inc(&cm_closes);
3496 cm_event.event = IW_CM_EVENT_CLOSE;
3497 cm_event.status = IW_CM_EVENT_STATUS_OK;
3498 cm_event.provider_data = cm_id->provider_data;
3499 cm_event.local_addr = cm_id->local_addr;
3500 cm_event.remote_addr = cm_id->remote_addr;
3501 cm_event.private_data = NULL;
3502 cm_event.private_data_len = 0;
3503 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3504 ret = cm_id->event_handler(cm_id, &cm_event);
3506 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3509 /* notify OF layer about this connection error event */
3510 cm_id->rem_ref(cm_id);
3519 static void cm_event_mpa_req(struct nes_cm_event *event)
3521 struct iw_cm_id *cm_id;
3522 struct iw_cm_event cm_event;
3524 struct nes_cm_node *cm_node;
3526 cm_node = event->cm_node;
3529 cm_id = cm_node->cm_id;
3531 atomic_inc(&cm_connect_reqs);
3532 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3533 cm_node, cm_id, jiffies);
3535 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3536 cm_event.status = IW_CM_EVENT_STATUS_OK;
3537 cm_event.provider_data = (void *)cm_node;
3539 cm_event.local_addr.sin_family = AF_INET;
3540 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3541 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3543 cm_event.remote_addr.sin_family = AF_INET;
3544 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3545 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3546 cm_event.private_data = cm_node->mpa_frame_buf;
3547 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3549 ret = cm_id->event_handler(cm_id, &cm_event);
3551 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3552 __func__, __LINE__, ret);
3557 static void cm_event_mpa_reject(struct nes_cm_event *event)
3559 struct iw_cm_id *cm_id;
3560 struct iw_cm_event cm_event;
3561 struct nes_cm_node *cm_node;
3564 cm_node = event->cm_node;
3567 cm_id = cm_node->cm_id;
3569 atomic_inc(&cm_connect_reqs);
3570 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3571 cm_node, cm_id, jiffies);
3573 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3574 cm_event.status = -ECONNREFUSED;
3575 cm_event.provider_data = cm_id->provider_data;
3577 cm_event.local_addr.sin_family = AF_INET;
3578 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3579 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3581 cm_event.remote_addr.sin_family = AF_INET;
3582 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3583 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3585 cm_event.private_data = cm_node->mpa_frame_buf;
3586 cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3588 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3589 "remove_addr=%08x\n",
3590 cm_event.local_addr.sin_addr.s_addr,
3591 cm_event.remote_addr.sin_addr.s_addr);
3593 ret = cm_id->event_handler(cm_id, &cm_event);
3595 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3596 __func__, __LINE__, ret);
3602 static void nes_cm_event_handler(struct work_struct *);
3606 * post an event to the cm event handler
3608 static int nes_cm_post_event(struct nes_cm_event *event)
3610 atomic_inc(&event->cm_node->cm_core->events_posted);
3611 add_ref_cm_node(event->cm_node);
3612 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3613 INIT_WORK(&event->event_work, nes_cm_event_handler);
3614 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3615 event->cm_node, event);
3617 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3619 nes_debug(NES_DBG_CM, "Exit\n");
3625 * nes_cm_event_handler
3626 * worker function to handle cm events
3627 * will free instance of nes_cm_event
3629 static void nes_cm_event_handler(struct work_struct *work)
3631 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3633 struct nes_cm_core *cm_core;
3635 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3638 cm_core = event->cm_node->cm_core;
3639 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3640 event, event->type, atomic_read(&cm_core->events_posted));
3642 switch (event->type) {
3643 case NES_CM_EVENT_MPA_REQ:
3644 cm_event_mpa_req(event);
3645 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3648 case NES_CM_EVENT_RESET:
3649 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3651 cm_event_reset(event);
3653 case NES_CM_EVENT_CONNECTED:
3654 if ((!event->cm_node->cm_id) ||
3655 (event->cm_node->state != NES_CM_STATE_TSA))
3657 cm_event_connected(event);
3658 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3660 case NES_CM_EVENT_MPA_REJECT:
3661 if ((!event->cm_node->cm_id) ||
3662 (event->cm_node->state == NES_CM_STATE_TSA))
3664 cm_event_mpa_reject(event);
3665 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3668 case NES_CM_EVENT_ABORTED:
3669 if ((!event->cm_node->cm_id) ||
3670 (event->cm_node->state == NES_CM_STATE_TSA))
3672 cm_event_connect_error(event);
3673 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3675 case NES_CM_EVENT_DROPPED_PKT:
3676 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3679 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3683 atomic_dec(&cm_core->events_posted);
3684 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3685 rem_ref_cm_node(cm_core, event->cm_node);