2 * Copyright (c) 2006 - 2014 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 <linux/atomic.h>
38 #include <linux/skbuff.h>
40 #include <linux/tcp.h>
41 #include <linux/init.h>
42 #include <linux/if_arp.h>
43 #include <linux/if_vlan.h>
44 #include <linux/notifier.h>
45 #include <linux/net.h>
46 #include <linux/types.h>
47 #include <linux/timer.h>
48 #include <linux/time.h>
49 #include <linux/delay.h>
50 #include <linux/etherdevice.h>
51 #include <linux/netdevice.h>
52 #include <linux/random.h>
53 #include <linux/list.h>
54 #include <linux/threads.h>
55 #include <linux/highmem.h>
56 #include <linux/slab.h>
58 #include <net/neighbour.h>
59 #include <net/route.h>
60 #include <net/ip_fib.h>
62 #include <linux/fcntl.h>
67 u32 cm_packets_bounced;
68 u32 cm_packets_dropped;
69 u32 cm_packets_retrans;
70 u32 cm_packets_created;
71 u32 cm_packets_received;
72 atomic_t cm_listens_created;
73 atomic_t cm_listens_destroyed;
75 atomic_t cm_loopbacks;
76 atomic_t cm_nodes_created;
77 atomic_t cm_nodes_destroyed;
78 atomic_t cm_accel_dropped_pkts;
79 atomic_t cm_resets_recvd;
81 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
82 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, 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 *, struct nes_vnic *, u16, void *, struct nes_cm_info *);
85 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
86 static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *);
87 static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
88 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
89 static int mini_cm_dealloc_core(struct nes_cm_core *);
90 static int mini_cm_get(struct nes_cm_core *);
91 static int mini_cm_set(struct nes_cm_core *, u32, u32);
93 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
94 static int add_ref_cm_node(struct nes_cm_node *);
95 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
97 static int nes_cm_disconn_true(struct nes_qp *);
98 static int nes_cm_post_event(struct nes_cm_event *event);
99 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
100 static void nes_disconnect_worker(struct work_struct *work);
102 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
103 static int send_mpa_reject(struct nes_cm_node *);
104 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
105 static int send_reset(struct nes_cm_node *, struct sk_buff *);
106 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
107 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
108 static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
110 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
111 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
112 static void cleanup_retrans_entry(struct nes_cm_node *);
113 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
114 static void free_retrans_entry(struct nes_cm_node *cm_node);
115 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
117 /* CM event handler functions */
118 static void cm_event_connected(struct nes_cm_event *);
119 static void cm_event_connect_error(struct nes_cm_event *);
120 static void cm_event_reset(struct nes_cm_event *);
121 static void cm_event_mpa_req(struct nes_cm_event *);
122 static void cm_event_mpa_reject(struct nes_cm_event *);
123 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
125 /* MPA build functions */
126 static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
127 static void build_mpa_v2(struct nes_cm_node *, void *, u8);
128 static void build_mpa_v1(struct nes_cm_node *, void *, u8);
129 static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
131 static void print_core(struct nes_cm_core *core);
132 static void record_ird_ord(struct nes_cm_node *, u16, u16);
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 const 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;
161 int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
163 return add_ref_cm_node(cm_node);
166 int nes_rem_ref_cm_node(struct nes_cm_node *cm_node)
168 return rem_ref_cm_node(cm_node->cm_core, cm_node);
173 static struct nes_cm_event *create_event(struct nes_cm_node * cm_node,
174 enum nes_cm_event_type type)
176 struct nes_cm_event *event;
181 /* allocate an empty event */
182 event = kzalloc(sizeof(*event), GFP_ATOMIC);
188 event->cm_node = cm_node;
189 event->cm_info.rem_addr = cm_node->rem_addr;
190 event->cm_info.loc_addr = cm_node->loc_addr;
191 event->cm_info.rem_port = cm_node->rem_port;
192 event->cm_info.loc_port = cm_node->loc_port;
193 event->cm_info.cm_id = cm_node->cm_id;
195 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
196 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
197 cm_node, event, type, event->cm_info.loc_addr,
198 event->cm_info.loc_port, event->cm_info.rem_addr,
199 event->cm_info.rem_port);
201 nes_cm_post_event(event);
209 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
212 u8 *start_ptr = &start_addr;
213 u8 **start_buff = &start_ptr;
217 nes_debug(NES_DBG_CM, "skb set to NULL\n");
221 /* send an MPA Request frame */
222 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REQUEST);
223 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK);
225 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
230 static int send_mpa_reject(struct nes_cm_node *cm_node)
232 struct sk_buff *skb = NULL;
234 u8 *start_ptr = &start_addr;
235 u8 **start_buff = &start_ptr;
237 struct ietf_mpa_v1 *mpa_frame;
239 skb = dev_alloc_skb(MAX_CM_BUFFER);
241 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
245 /* send an MPA reject frame */
246 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY);
247 mpa_frame = (struct ietf_mpa_v1 *)*start_buff;
248 mpa_frame->flags |= IETF_MPA_FLAGS_REJECT;
249 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN);
251 cm_node->state = NES_CM_STATE_FIN_WAIT1;
252 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
257 * recv_mpa - process a received TCP pkt, we are expecting an
260 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
263 struct ietf_mpa_v1 *mpa_frame;
264 struct ietf_mpa_v2 *mpa_v2_frame;
265 struct ietf_rtr_msg *rtr_msg;
269 *type = NES_MPA_REQUEST_ACCEPT;
271 /* assume req frame is in tcp data payload */
272 if (len < sizeof(struct ietf_mpa_v1)) {
273 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
277 /* points to the beginning of the frame, which could be MPA V1 or V2 */
278 mpa_frame = (struct ietf_mpa_v1 *)buffer;
279 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
280 priv_data_len = ntohs(mpa_frame->priv_data_len);
282 /* make sure mpa private data len is less than 512 bytes */
283 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
284 nes_debug(NES_DBG_CM, "The received Length of Private"
285 " Data field exceeds 512 octets\n");
289 * make sure MPA receiver interoperate with the
290 * received MPA version and MPA key information
293 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
294 nes_debug(NES_DBG_CM, "The received mpa version"
295 " is not supported\n");
299 * backwards compatibility only
301 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
302 nes_debug(NES_DBG_CM, "The received mpa version"
303 " can not be interoperated\n");
306 cm_node->mpa_frame_rev = mpa_frame->rev;
309 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
310 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
311 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
315 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
316 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
321 if (priv_data_len + mpa_hdr_len != len) {
322 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
323 " complete (%x + %x != %x)\n",
324 priv_data_len, mpa_hdr_len, len);
327 /* make sure it does not exceed the max size */
328 if (len > MAX_CM_BUFFER) {
329 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
330 " (%x + %x != %x)\n",
331 priv_data_len, mpa_hdr_len, len);
335 cm_node->mpa_frame_size = priv_data_len;
337 switch (mpa_frame->rev) {
344 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
345 mpa_hdr_len += IETF_RTR_MSG_SIZE;
346 cm_node->mpa_frame_size -= IETF_RTR_MSG_SIZE;
347 rtr_msg = &mpa_v2_frame->rtr_msg;
349 /* parse rtr message */
350 rtr_ctrl_ird = ntohs(rtr_msg->ctrl_ird);
351 rtr_ctrl_ord = ntohs(rtr_msg->ctrl_ord);
352 ird_size = rtr_ctrl_ird & IETF_NO_IRD_ORD;
353 ord_size = rtr_ctrl_ord & IETF_NO_IRD_ORD;
355 if (!(rtr_ctrl_ird & IETF_PEER_TO_PEER)) {
359 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD)
360 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
362 if (cm_node->mpav2_ird_ord != IETF_NO_IRD_ORD) {
364 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
365 /* we are still negotiating */
366 if (ord_size > NES_MAX_IRD) {
367 cm_node->ird_size = NES_MAX_IRD;
369 cm_node->ird_size = ord_size;
371 (rtr_ctrl_ord & IETF_RDMA0_READ)) {
372 cm_node->ird_size = 1;
373 nes_debug(NES_DBG_CM,
374 "%s: Remote peer doesn't support RDMA0_READ (ord=%u)\n",
378 if (ird_size > NES_MAX_ORD)
379 cm_node->ord_size = NES_MAX_ORD;
381 cm_node->ord_size = ird_size;
382 } else { /* initiator */
383 if (ord_size > NES_MAX_IRD) {
384 nes_debug(NES_DBG_CM,
385 "%s: Unable to support the requested (ord =%u)\n",
389 cm_node->ird_size = ord_size;
391 if (ird_size > NES_MAX_ORD) {
392 cm_node->ord_size = NES_MAX_ORD;
395 (rtr_ctrl_ord & IETF_RDMA0_READ)) {
396 nes_debug(NES_DBG_CM,
397 "%s: Remote peer doesn't support RDMA0_READ (ird=%u)\n",
401 cm_node->ord_size = ird_size;
407 if (rtr_ctrl_ord & IETF_RDMA0_READ) {
408 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
410 } else if (rtr_ctrl_ord & IETF_RDMA0_WRITE) {
411 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
412 } else { /* Not supported RDMA0 operation */
422 /* copy entire MPA frame to our cm_node's frame */
423 memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size);
425 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
426 *type = NES_MPA_REQUEST_REJECT;
432 * form_cm_frame - get a free packet and build empty frame Use
433 * node info to build.
435 static void form_cm_frame(struct sk_buff *skb,
436 struct nes_cm_node *cm_node, void *options, u32 optionsize,
437 void *data, u32 datasize, u8 flags)
443 u16 packetsize = sizeof(*iph);
445 packetsize += sizeof(*tcph);
446 packetsize += optionsize + datasize;
449 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
451 buf = skb_put(skb, packetsize + ETH_HLEN);
453 ethh = (struct ethhdr *)buf;
456 iph = (struct iphdr *)buf;
458 tcph = (struct tcphdr *)buf;
459 skb_reset_mac_header(skb);
460 skb_set_network_header(skb, ETH_HLEN);
461 skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph));
462 buf += sizeof(*tcph);
464 skb->ip_summed = CHECKSUM_PARTIAL;
465 if (!(cm_node->netdev->features & NETIF_F_IP_CSUM))
466 skb->ip_summed = CHECKSUM_NONE;
467 skb->protocol = htons(0x800);
469 skb->mac_len = ETH_HLEN;
471 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
472 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
473 ethh->h_proto = htons(0x0800);
475 iph->version = IPVERSION;
476 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
478 iph->tot_len = htons(packetsize);
479 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
481 iph->frag_off = htons(0x4000);
483 iph->protocol = 0x06; /* IPPROTO_TCP */
485 iph->saddr = htonl(cm_node->mapped_loc_addr);
486 iph->daddr = htonl(cm_node->mapped_rem_addr);
488 tcph->source = htons(cm_node->mapped_loc_port);
489 tcph->dest = htons(cm_node->mapped_rem_port);
490 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
492 if (flags & SET_ACK) {
493 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
494 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
500 if (flags & SET_SYN) {
501 cm_node->tcp_cntxt.loc_seq_num++;
504 cm_node->tcp_cntxt.loc_seq_num += datasize;
507 if (flags & SET_FIN) {
508 cm_node->tcp_cntxt.loc_seq_num++;
515 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
516 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
519 memcpy(buf, options, optionsize);
522 memcpy(buf, data, datasize);
524 skb_shinfo(skb)->nr_frags = 0;
525 cm_packets_created++;
529 * nes_create_sockaddr - Record ip addr and tcp port in a sockaddr struct
531 static void nes_create_sockaddr(__be32 ip_addr, __be16 port,
532 struct sockaddr_storage *addr)
534 struct sockaddr_in *nes_sockaddr = (struct sockaddr_in *)addr;
535 nes_sockaddr->sin_family = AF_INET;
536 memcpy(&nes_sockaddr->sin_addr.s_addr, &ip_addr, sizeof(__be32));
537 nes_sockaddr->sin_port = port;
541 * nes_create_mapinfo - Create a mapinfo object in the port mapper data base
543 static int nes_create_mapinfo(struct nes_cm_info *cm_info)
545 struct sockaddr_storage local_sockaddr;
546 struct sockaddr_storage mapped_sockaddr;
548 nes_create_sockaddr(htonl(cm_info->loc_addr), htons(cm_info->loc_port),
550 nes_create_sockaddr(htonl(cm_info->mapped_loc_addr),
551 htons(cm_info->mapped_loc_port), &mapped_sockaddr);
553 return iwpm_create_mapinfo(&local_sockaddr,
554 &mapped_sockaddr, RDMA_NL_NES);
558 * nes_remove_mapinfo - Remove a mapinfo object from the port mapper data base
559 * and send a remove mapping op message to
560 * the userspace port mapper
562 static int nes_remove_mapinfo(u32 loc_addr, u16 loc_port,
563 u32 mapped_loc_addr, u16 mapped_loc_port)
565 struct sockaddr_storage local_sockaddr;
566 struct sockaddr_storage mapped_sockaddr;
568 nes_create_sockaddr(htonl(loc_addr), htons(loc_port), &local_sockaddr);
569 nes_create_sockaddr(htonl(mapped_loc_addr), htons(mapped_loc_port),
572 iwpm_remove_mapinfo(&local_sockaddr, &mapped_sockaddr);
573 return iwpm_remove_mapping(&local_sockaddr, RDMA_NL_NES);
577 * nes_form_pm_msg - Form a port mapper message with mapping info
579 static void nes_form_pm_msg(struct nes_cm_info *cm_info,
580 struct iwpm_sa_data *pm_msg)
582 nes_create_sockaddr(htonl(cm_info->loc_addr), htons(cm_info->loc_port),
584 nes_create_sockaddr(htonl(cm_info->rem_addr), htons(cm_info->rem_port),
589 * nes_form_reg_msg - Form a port mapper message with dev info
591 static void nes_form_reg_msg(struct nes_vnic *nesvnic,
592 struct iwpm_dev_data *pm_msg)
594 memcpy(pm_msg->dev_name, nesvnic->nesibdev->ibdev.name,
596 memcpy(pm_msg->if_name, nesvnic->netdev->name, IWPM_IFNAME_SIZE);
599 static void record_sockaddr_info(struct sockaddr_storage *addr_info,
600 nes_addr_t *ip_addr, u16 *port_num)
602 struct sockaddr_in *in_addr = (struct sockaddr_in *)addr_info;
604 if (in_addr->sin_family == AF_INET) {
605 *ip_addr = ntohl(in_addr->sin_addr.s_addr);
606 *port_num = ntohs(in_addr->sin_port);
611 * nes_record_pm_msg - Save the received mapping info
613 static void nes_record_pm_msg(struct nes_cm_info *cm_info,
614 struct iwpm_sa_data *pm_msg)
616 record_sockaddr_info(&pm_msg->mapped_loc_addr,
617 &cm_info->mapped_loc_addr, &cm_info->mapped_loc_port);
619 record_sockaddr_info(&pm_msg->mapped_rem_addr,
620 &cm_info->mapped_rem_addr, &cm_info->mapped_rem_port);
624 * nes_get_reminfo - Get the address info of the remote connecting peer
626 static int nes_get_remote_addr(struct nes_cm_node *cm_node)
628 struct sockaddr_storage mapped_loc_addr, mapped_rem_addr;
629 struct sockaddr_storage remote_addr;
632 nes_create_sockaddr(htonl(cm_node->mapped_loc_addr),
633 htons(cm_node->mapped_loc_port), &mapped_loc_addr);
634 nes_create_sockaddr(htonl(cm_node->mapped_rem_addr),
635 htons(cm_node->mapped_rem_port), &mapped_rem_addr);
637 ret = iwpm_get_remote_info(&mapped_loc_addr, &mapped_rem_addr,
638 &remote_addr, RDMA_NL_NES);
640 nes_debug(NES_DBG_CM, "Unable to find remote peer address info\n");
642 record_sockaddr_info(&remote_addr, &cm_node->rem_addr,
648 * print_core - dump a cm core
650 static void print_core(struct nes_cm_core *core)
652 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
653 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
656 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
658 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
660 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
661 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
663 nes_debug(NES_DBG_CM, "core : %p \n", core);
665 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
668 static void record_ird_ord(struct nes_cm_node *cm_node,
669 u16 conn_ird, u16 conn_ord)
671 if (conn_ird > NES_MAX_IRD)
672 conn_ird = NES_MAX_IRD;
674 if (conn_ord > NES_MAX_ORD)
675 conn_ord = NES_MAX_ORD;
677 cm_node->ird_size = conn_ird;
678 cm_node->ord_size = conn_ord;
682 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
684 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
685 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
689 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
691 switch (cm_node->mpa_frame_rev) {
693 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
694 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
695 build_mpa_v1(cm_node, *start_buff, mpa_key);
698 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
699 build_mpa_v2(cm_node, *start_buff, mpa_key);
708 * build_mpa_v2 - build a MPA V2 frame
710 static void build_mpa_v2(struct nes_cm_node *cm_node,
711 void *start_addr, u8 mpa_key)
713 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
714 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
718 /* initialize the upper 5 bytes of the frame */
719 build_mpa_v1(cm_node, start_addr, mpa_key);
720 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
721 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
723 /* initialize RTR msg */
724 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
725 ctrl_ird = IETF_NO_IRD_ORD;
726 ctrl_ord = IETF_NO_IRD_ORD;
728 ctrl_ird = cm_node->ird_size & IETF_NO_IRD_ORD;
729 ctrl_ord = cm_node->ord_size & IETF_NO_IRD_ORD;
731 ctrl_ird |= IETF_PEER_TO_PEER;
732 ctrl_ird |= IETF_FLPDU_ZERO_LEN;
735 case MPA_KEY_REQUEST:
736 ctrl_ord |= IETF_RDMA0_WRITE;
737 ctrl_ord |= IETF_RDMA0_READ;
740 switch (cm_node->send_rdma0_op) {
741 case SEND_RDMA_WRITE_ZERO:
742 ctrl_ord |= IETF_RDMA0_WRITE;
744 case SEND_RDMA_READ_ZERO:
745 ctrl_ord |= IETF_RDMA0_READ;
749 rtr_msg->ctrl_ird = htons(ctrl_ird);
750 rtr_msg->ctrl_ord = htons(ctrl_ord);
754 * build_mpa_v1 - build a MPA V1 frame
756 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
758 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
761 case MPA_KEY_REQUEST:
762 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
765 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
768 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
769 mpa_frame->rev = cm_node->mpa_frame_rev;
770 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
773 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
776 struct nes_qp *nesqp = *nesqp_addr;
777 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
779 u64temp = (unsigned long)nesqp->nesuqp_addr;
780 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
781 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
783 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
784 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
786 switch (cm_node->send_rdma0_op) {
787 case SEND_RDMA_WRITE_ZERO:
788 nes_debug(NES_DBG_CM, "Sending first write.\n");
789 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
790 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
791 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
792 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
793 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
796 case SEND_RDMA_READ_ZERO:
798 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
799 WARN(1, "Unsupported RDMA0 len operation=%u\n",
800 cm_node->send_rdma0_op);
801 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
802 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
803 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
804 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
805 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
806 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
807 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
808 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
812 if (nesqp->sq_kmapped) {
813 nesqp->sq_kmapped = 0;
817 /*use the reserved spot on the WQ for the extra first WQE*/
818 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
819 NES_QPCONTEXT_ORDIRD_WRPDU |
820 NES_QPCONTEXT_ORDIRD_ALSMM));
821 nesqp->skip_lsmm = 1;
822 nesqp->hwqp.sq_tail = 0;
827 * note - cm_node needs to be protected before calling this. Encase in:
828 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
830 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
831 enum nes_timer_type type, int send_retrans,
832 int close_when_complete)
835 struct nes_cm_core *cm_core = cm_node->cm_core;
836 struct nes_timer_entry *new_send;
839 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
843 /* new_send->timetosend = currenttime */
844 new_send->retrycount = NES_DEFAULT_RETRYS;
845 new_send->retranscount = NES_DEFAULT_RETRANS;
847 new_send->timetosend = jiffies;
848 new_send->type = type;
849 new_send->netdev = cm_node->netdev;
850 new_send->send_retrans = send_retrans;
851 new_send->close_when_complete = close_when_complete;
853 if (type == NES_TIMER_TYPE_CLOSE) {
854 new_send->timetosend += (HZ / 10);
855 if (cm_node->recv_entry) {
860 cm_node->recv_entry = new_send;
863 if (type == NES_TIMER_TYPE_SEND) {
864 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
865 atomic_inc(&new_send->skb->users);
866 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
867 cm_node->send_entry = new_send;
868 add_ref_cm_node(cm_node);
869 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
870 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
872 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
873 if (ret != NETDEV_TX_OK) {
874 nes_debug(NES_DBG_CM, "Error sending packet %p "
875 "(jiffies = %lu)\n", new_send, jiffies);
876 new_send->timetosend = jiffies;
881 cleanup_retrans_entry(cm_node);
882 if (close_when_complete)
883 rem_ref_cm_node(cm_core, cm_node);
889 if (!timer_pending(&cm_core->tcp_timer))
890 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
895 static void nes_retrans_expired(struct nes_cm_node *cm_node)
897 struct iw_cm_id *cm_id = cm_node->cm_id;
898 enum nes_cm_node_state state = cm_node->state;
899 cm_node->state = NES_CM_STATE_CLOSED;
902 case NES_CM_STATE_SYN_RCVD:
903 case NES_CM_STATE_CLOSING:
904 rem_ref_cm_node(cm_node->cm_core, cm_node);
906 case NES_CM_STATE_LAST_ACK:
907 case NES_CM_STATE_FIN_WAIT1:
909 cm_id->rem_ref(cm_id);
910 send_reset(cm_node, NULL);
913 add_ref_cm_node(cm_node);
914 send_reset(cm_node, NULL);
915 create_event(cm_node, NES_CM_EVENT_ABORTED);
919 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
921 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
922 struct iw_cm_id *cm_id = cm_node->cm_id;
923 struct nes_qp *nesqp;
924 unsigned long qplockflags;
928 nesqp = (struct nes_qp *)recv_entry->skb;
930 spin_lock_irqsave(&nesqp->lock, qplockflags);
932 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
933 "refcount = %d: HIT A "
934 "NES_TIMER_TYPE_CLOSE with something "
935 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
936 atomic_read(&nesqp->refcount));
937 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
938 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
939 nesqp->ibqp_state = IB_QPS_ERR;
940 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
941 nes_cm_disconn(nesqp);
943 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
944 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
945 "refcount = %d: HIT A "
946 "NES_TIMER_TYPE_CLOSE with nothing "
947 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
948 atomic_read(&nesqp->refcount));
950 } else if (rem_node) {
951 /* TIME_WAIT state */
952 rem_ref_cm_node(cm_node->cm_core, cm_node);
955 cm_id->rem_ref(cm_id);
957 cm_node->recv_entry = NULL;
963 static void nes_cm_timer_tick(unsigned long pass)
966 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
967 struct nes_cm_node *cm_node;
968 struct nes_timer_entry *send_entry, *recv_entry;
969 struct list_head *list_core_temp;
970 struct list_head *list_node;
971 struct nes_cm_core *cm_core = g_cm_core;
973 unsigned long timetosend;
974 int ret = NETDEV_TX_OK;
976 struct list_head timer_list;
978 INIT_LIST_HEAD(&timer_list);
979 spin_lock_irqsave(&cm_core->ht_lock, flags);
981 list_for_each_safe(list_node, list_core_temp,
982 &cm_core->connected_nodes) {
983 cm_node = container_of(list_node, struct nes_cm_node, list);
984 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
985 add_ref_cm_node(cm_node);
986 list_add(&cm_node->timer_entry, &timer_list);
989 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
991 list_for_each_safe(list_node, list_core_temp, &timer_list) {
992 cm_node = container_of(list_node, struct nes_cm_node,
994 recv_entry = cm_node->recv_entry;
997 if (time_after(recv_entry->timetosend, jiffies)) {
998 if (nexttimeout > recv_entry->timetosend ||
1000 nexttimeout = recv_entry->timetosend;
1004 handle_recv_entry(cm_node, 1);
1008 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1010 send_entry = cm_node->send_entry;
1013 if (time_after(send_entry->timetosend, jiffies)) {
1014 if (cm_node->state != NES_CM_STATE_TSA) {
1016 send_entry->timetosend) ||
1019 send_entry->timetosend;
1023 free_retrans_entry(cm_node);
1028 if ((cm_node->state == NES_CM_STATE_TSA) ||
1029 (cm_node->state == NES_CM_STATE_CLOSED)) {
1030 free_retrans_entry(cm_node);
1034 if (!send_entry->retranscount ||
1035 !send_entry->retrycount) {
1036 cm_packets_dropped++;
1037 free_retrans_entry(cm_node);
1039 spin_unlock_irqrestore(
1040 &cm_node->retrans_list_lock, flags);
1041 nes_retrans_expired(cm_node);
1042 cm_node->state = NES_CM_STATE_CLOSED;
1043 spin_lock_irqsave(&cm_node->retrans_list_lock,
1047 atomic_inc(&send_entry->skb->users);
1048 cm_packets_retrans++;
1049 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
1050 "for node %p, jiffies = %lu, time to send = "
1051 "%lu, retranscount = %u, send_entry->seq_num = "
1052 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
1053 "0x%08X\n", send_entry, cm_node, jiffies,
1054 send_entry->timetosend,
1055 send_entry->retranscount,
1056 send_entry->seq_num,
1057 cm_node->tcp_cntxt.rem_ack_num);
1059 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
1061 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
1062 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1063 if (ret != NETDEV_TX_OK) {
1064 nes_debug(NES_DBG_CM, "rexmit failed for "
1065 "node=%p\n", cm_node);
1066 cm_packets_bounced++;
1067 send_entry->retrycount--;
1068 nexttimeout = jiffies + NES_SHORT_TIME;
1074 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
1075 "%u, retry count = %u.\n",
1076 send_entry->retranscount,
1077 send_entry->retrycount);
1078 if (send_entry->send_retrans) {
1079 send_entry->retranscount--;
1080 timetosend = (NES_RETRY_TIMEOUT <<
1081 (NES_DEFAULT_RETRANS - send_entry->retranscount));
1083 send_entry->timetosend = jiffies +
1084 min(timetosend, NES_MAX_TIMEOUT);
1085 if (nexttimeout > send_entry->timetosend ||
1087 nexttimeout = send_entry->timetosend;
1091 int close_when_complete;
1092 close_when_complete =
1093 send_entry->close_when_complete;
1094 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
1095 cm_node, cm_node->state);
1096 free_retrans_entry(cm_node);
1097 if (close_when_complete)
1098 rem_ref_cm_node(cm_node->cm_core,
1103 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1104 rem_ref_cm_node(cm_node->cm_core, cm_node);
1108 if (!timer_pending(&cm_core->tcp_timer))
1109 mod_timer(&cm_core->tcp_timer, nexttimeout);
1117 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
1118 struct sk_buff *skb)
1121 int flags = SET_SYN;
1122 char optionsbuffer[sizeof(struct option_mss) +
1123 sizeof(struct option_windowscale) + sizeof(struct option_base) +
1124 TCP_OPTIONS_PADDING];
1126 int optionssize = 0;
1127 /* Sending MSS option */
1128 union all_known_options *options;
1133 options = (union all_known_options *)&optionsbuffer[optionssize];
1134 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1135 options->as_mss.length = sizeof(struct option_mss);
1136 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1137 optionssize += sizeof(struct option_mss);
1139 options = (union all_known_options *)&optionsbuffer[optionssize];
1140 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1141 options->as_windowscale.length = sizeof(struct option_windowscale);
1142 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1143 optionssize += sizeof(struct option_windowscale);
1145 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
1146 options = (union all_known_options *)&optionsbuffer[optionssize];
1147 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
1148 options->as_base.length = sizeof(struct option_base);
1149 optionssize += sizeof(struct option_base);
1150 /* we need the size to be a multiple of 4 */
1151 options = (union all_known_options *)&optionsbuffer[optionssize];
1152 options->as_end = 1;
1154 options = (union all_known_options *)&optionsbuffer[optionssize];
1155 options->as_end = 1;
1159 options = (union all_known_options *)&optionsbuffer[optionssize];
1160 options->as_end = OPTION_NUMBER_END;
1164 skb = dev_alloc_skb(MAX_CM_BUFFER);
1166 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1173 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1174 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1183 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1186 int flags = SET_RST | SET_ACK;
1189 skb = dev_alloc_skb(MAX_CM_BUFFER);
1191 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1195 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1196 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1205 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1210 skb = dev_alloc_skb(MAX_CM_BUFFER);
1213 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1217 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1218 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1227 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1231 /* if we didn't get a frame get one */
1233 skb = dev_alloc_skb(MAX_CM_BUFFER);
1236 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1240 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1241 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1248 * find_node - find a cm node that matches the reference cm node
1250 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1251 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1253 unsigned long flags;
1254 struct list_head *hte;
1255 struct nes_cm_node *cm_node;
1257 /* get a handle on the hte */
1258 hte = &cm_core->connected_nodes;
1260 /* walk list and find cm_node associated with this session ID */
1261 spin_lock_irqsave(&cm_core->ht_lock, flags);
1262 list_for_each_entry(cm_node, hte, list) {
1263 /* compare quad, return node handle if a match */
1264 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1265 cm_node->loc_addr, cm_node->loc_port,
1267 cm_node->rem_addr, cm_node->rem_port,
1268 rem_addr, rem_port);
1269 if ((cm_node->mapped_loc_addr == loc_addr) &&
1270 (cm_node->mapped_loc_port == loc_port) &&
1271 (cm_node->mapped_rem_addr == rem_addr) &&
1272 (cm_node->mapped_rem_port == rem_port)) {
1274 add_ref_cm_node(cm_node);
1275 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1279 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1287 * find_listener - find a cm node listening on this addr-port pair
1289 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1290 nes_addr_t dst_addr, u16 dst_port,
1291 enum nes_cm_listener_state listener_state, int local)
1293 unsigned long flags;
1294 struct nes_cm_listener *listen_node;
1295 nes_addr_t listen_addr;
1298 /* walk list and find cm_node associated with this session ID */
1299 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1300 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1302 listen_addr = listen_node->loc_addr;
1303 listen_port = listen_node->loc_port;
1305 listen_addr = listen_node->mapped_loc_addr;
1306 listen_port = listen_node->mapped_loc_port;
1308 /* compare node pair, return node handle if a match */
1309 if (((listen_addr == dst_addr) ||
1310 listen_addr == 0x00000000) &&
1311 (listen_port == dst_port) &&
1312 (listener_state & listen_node->listener_state)) {
1313 atomic_inc(&listen_node->ref_count);
1314 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1318 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1325 * add_hte_node - add a cm node to the hash table
1327 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1329 unsigned long flags;
1330 struct list_head *hte;
1332 if (!cm_node || !cm_core)
1335 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1338 spin_lock_irqsave(&cm_core->ht_lock, flags);
1340 /* get a handle on the hash table element (list head for this slot) */
1341 hte = &cm_core->connected_nodes;
1342 list_add_tail(&cm_node->list, hte);
1343 atomic_inc(&cm_core->ht_node_cnt);
1345 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1352 * mini_cm_dec_refcnt_listen
1354 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1355 struct nes_cm_listener *listener, int free_hanging_nodes)
1359 unsigned long flags;
1360 struct list_head *list_pos = NULL;
1361 struct list_head *list_temp = NULL;
1362 struct nes_cm_node *cm_node = NULL;
1363 struct list_head reset_list;
1365 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1366 "refcnt=%d\n", listener, free_hanging_nodes,
1367 atomic_read(&listener->ref_count));
1368 /* free non-accelerated child nodes for this listener */
1369 INIT_LIST_HEAD(&reset_list);
1370 if (free_hanging_nodes) {
1371 spin_lock_irqsave(&cm_core->ht_lock, flags);
1372 list_for_each_safe(list_pos, list_temp,
1373 &g_cm_core->connected_nodes) {
1374 cm_node = container_of(list_pos, struct nes_cm_node,
1376 if ((cm_node->listener == listener) &&
1377 (!cm_node->accelerated)) {
1378 add_ref_cm_node(cm_node);
1379 list_add(&cm_node->reset_entry, &reset_list);
1382 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1385 list_for_each_safe(list_pos, list_temp, &reset_list) {
1386 cm_node = container_of(list_pos, struct nes_cm_node,
1389 struct nes_cm_node *loopback = cm_node->loopbackpartner;
1390 enum nes_cm_node_state old_state;
1391 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1392 rem_ref_cm_node(cm_node->cm_core, cm_node);
1395 cleanup_retrans_entry(cm_node);
1396 err = send_reset(cm_node, NULL);
1399 NES_CM_STATE_CLOSED;
1402 old_state = cm_node->state;
1403 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1404 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1410 struct nes_cm_event event;
1412 event.cm_node = loopback;
1413 event.cm_info.rem_addr =
1415 event.cm_info.loc_addr =
1417 event.cm_info.rem_port =
1419 event.cm_info.loc_port =
1421 event.cm_info.cm_id = loopback->cm_id;
1422 add_ref_cm_node(loopback);
1423 loopback->state = NES_CM_STATE_CLOSED;
1424 cm_event_connect_error(&event);
1425 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1427 rem_ref_cm_node(cm_node->cm_core,
1435 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1436 if (!atomic_dec_return(&listener->ref_count)) {
1437 list_del(&listener->list);
1439 /* decrement our listen node count */
1440 atomic_dec(&cm_core->listen_node_cnt);
1442 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1444 if (listener->nesvnic) {
1445 nes_manage_apbvt(listener->nesvnic,
1446 listener->mapped_loc_port,
1447 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn),
1448 NES_MANAGE_APBVT_DEL);
1450 nes_remove_mapinfo(listener->loc_addr,
1452 listener->mapped_loc_addr,
1453 listener->mapped_loc_port);
1454 nes_debug(NES_DBG_NLMSG,
1455 "Delete APBVT mapped_loc_port = %04X\n",
1456 listener->mapped_loc_port);
1459 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1464 atomic_inc(&cm_listens_destroyed);
1466 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1469 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1470 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1471 " with non-zero pending accepts=%u\n",
1472 listener, atomic_read(&listener->pend_accepts_cnt));
1480 * mini_cm_del_listen
1482 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1483 struct nes_cm_listener *listener)
1485 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1486 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1487 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1492 * mini_cm_accelerated
1494 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1495 struct nes_cm_node *cm_node)
1497 cm_node->accelerated = 1;
1499 if (cm_node->accept_pend) {
1500 BUG_ON(!cm_node->listener);
1501 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1502 cm_node->accept_pend = 0;
1503 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1506 if (!timer_pending(&cm_core->tcp_timer))
1507 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
1514 * nes_addr_resolve_neigh
1516 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1519 struct neighbour *neigh;
1521 struct net_device *netdev;
1522 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1523 __be32 dst_ipaddr = htonl(dst_ip);
1525 rt = ip_route_output(&init_net, dst_ipaddr, nesvnic->local_ipaddr, 0, 0);
1527 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1532 if (netif_is_bond_slave(nesvnic->netdev))
1533 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
1535 netdev = nesvnic->netdev;
1537 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1541 if (neigh->nud_state & NUD_VALID) {
1542 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1543 " is %pM, Gateway is 0x%08X \n", dst_ip,
1544 neigh->ha, ntohl(rt->rt_gateway));
1546 if (arpindex >= 0) {
1547 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
1548 /* Mac address same as in nes_arp_table */
1552 nes_manage_arp_cache(nesvnic->netdev,
1553 nesadapter->arp_table[arpindex].mac_addr,
1554 dst_ip, NES_ARP_DELETE);
1557 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1558 dst_ip, NES_ARP_ADD);
1559 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1562 neigh_event_send(neigh, NULL);
1569 neigh_release(neigh);
1576 * make_cm_node - create a new instance of a cm node
1578 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1579 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1580 struct nes_cm_listener *listener)
1582 struct nes_cm_node *cm_node;
1584 int oldarpindex = 0;
1586 struct nes_device *nesdev;
1587 struct nes_adapter *nesadapter;
1589 /* create an hte and cm_node for this instance */
1590 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1594 /* set our node specific transport info */
1596 cm_node->loc_addr = listener->loc_addr;
1597 cm_node->loc_port = listener->loc_port;
1599 cm_node->loc_addr = cm_info->loc_addr;
1600 cm_node->loc_port = cm_info->loc_port;
1602 cm_node->rem_addr = cm_info->rem_addr;
1603 cm_node->rem_port = cm_info->rem_port;
1605 cm_node->mapped_loc_addr = cm_info->mapped_loc_addr;
1606 cm_node->mapped_rem_addr = cm_info->mapped_rem_addr;
1607 cm_node->mapped_loc_port = cm_info->mapped_loc_port;
1608 cm_node->mapped_rem_port = cm_info->mapped_rem_port;
1610 cm_node->mpa_frame_rev = mpa_version;
1611 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1612 cm_node->mpav2_ird_ord = 0;
1613 cm_node->ird_size = 0;
1614 cm_node->ord_size = 0;
1616 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1617 &cm_node->loc_addr, cm_node->loc_port,
1618 &cm_node->rem_addr, cm_node->rem_port);
1619 cm_node->listener = listener;
1621 cm_node->tos = listener->tos;
1622 cm_node->netdev = nesvnic->netdev;
1623 cm_node->cm_id = cm_info->cm_id;
1624 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1626 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1629 spin_lock_init(&cm_node->retrans_list_lock);
1631 cm_node->loopbackpartner = NULL;
1632 atomic_set(&cm_node->ref_count, 1);
1633 /* associate our parent CM core */
1634 cm_node->cm_core = cm_core;
1635 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1636 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1637 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1638 NES_CM_DEFAULT_RCV_WND_SCALE;
1639 ts = current_kernel_time();
1640 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1641 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1642 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1643 cm_node->tcp_cntxt.rcv_nxt = 0;
1644 /* get a unique session ID , add thread_id to an upcounter to handle race */
1645 atomic_inc(&cm_core->node_cnt);
1646 cm_node->conn_type = cm_info->conn_type;
1647 cm_node->apbvt_set = 0;
1648 cm_node->accept_pend = 0;
1650 cm_node->nesvnic = nesvnic;
1651 /* get some device handles, for arp lookup */
1652 nesdev = nesvnic->nesdev;
1653 nesadapter = nesdev->nesadapter;
1655 cm_node->loopbackpartner = NULL;
1657 /* get the mac addr for the remote node */
1658 oldarpindex = nes_arp_table(nesdev, cm_node->mapped_rem_addr,
1659 NULL, NES_ARP_RESOLVE);
1660 arpindex = nes_addr_resolve_neigh(nesvnic,
1661 cm_node->mapped_rem_addr, oldarpindex);
1667 /* copy the mac addr to node context */
1668 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1669 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1672 add_hte_node(cm_core, cm_node);
1673 atomic_inc(&cm_nodes_created);
1680 * add_ref_cm_node - destroy an instance of a cm node
1682 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1684 atomic_inc(&cm_node->ref_count);
1690 * rem_ref_cm_node - destroy an instance of a cm node
1692 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1693 struct nes_cm_node *cm_node)
1695 unsigned long flags;
1696 struct nes_qp *nesqp;
1701 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1702 if (atomic_dec_return(&cm_node->ref_count)) {
1703 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1706 list_del(&cm_node->list);
1707 atomic_dec(&cm_core->ht_node_cnt);
1708 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1710 /* if the node is destroyed before connection was accelerated */
1711 if (!cm_node->accelerated && cm_node->accept_pend) {
1712 BUG_ON(!cm_node->listener);
1713 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1714 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1716 WARN_ON(cm_node->send_entry);
1717 if (cm_node->recv_entry)
1718 handle_recv_entry(cm_node, 0);
1719 if (cm_node->listener) {
1720 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1722 if (cm_node->apbvt_set && cm_node->nesvnic) {
1723 nes_manage_apbvt(cm_node->nesvnic, cm_node->mapped_loc_port,
1724 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1725 NES_MANAGE_APBVT_DEL);
1727 nes_debug(NES_DBG_NLMSG, "Delete APBVT mapped_loc_port = %04X\n",
1728 cm_node->mapped_loc_port);
1729 nes_remove_mapinfo(cm_node->loc_addr, cm_node->loc_port,
1730 cm_node->mapped_loc_addr, cm_node->mapped_loc_port);
1733 atomic_dec(&cm_core->node_cnt);
1734 atomic_inc(&cm_nodes_destroyed);
1735 nesqp = cm_node->nesqp;
1737 nesqp->cm_node = NULL;
1738 nes_rem_ref(&nesqp->ibqp);
1739 cm_node->nesqp = NULL;
1749 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1750 u32 optionsize, u32 syn_packet)
1754 union all_known_options *all_options;
1755 char got_mss_option = 0;
1757 while (offset < optionsize) {
1758 all_options = (union all_known_options *)(optionsloc + offset);
1759 switch (all_options->as_base.optionnum) {
1760 case OPTION_NUMBER_END:
1761 offset = optionsize;
1763 case OPTION_NUMBER_NONE:
1766 case OPTION_NUMBER_MSS:
1767 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1768 "Size: %d\n", __func__,
1769 all_options->as_mss.length, offset, optionsize);
1771 if (all_options->as_mss.length != 4) {
1774 tmp = ntohs(all_options->as_mss.mss);
1775 if (tmp > 0 && tmp <
1776 cm_node->tcp_cntxt.mss)
1777 cm_node->tcp_cntxt.mss = tmp;
1780 case OPTION_NUMBER_WINDOW_SCALE:
1781 cm_node->tcp_cntxt.snd_wscale =
1782 all_options->as_windowscale.shiftcount;
1785 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1786 all_options->as_base.optionnum);
1789 offset += all_options->as_base.length;
1791 if ((!got_mss_option) && (syn_packet))
1792 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1796 static void drop_packet(struct sk_buff *skb)
1798 atomic_inc(&cm_accel_dropped_pkts);
1799 dev_kfree_skb_any(skb);
1802 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1804 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1805 "refcnt=%d\n", cm_node, cm_node->state,
1806 atomic_read(&cm_node->ref_count));
1807 switch (cm_node->state) {
1808 case NES_CM_STATE_SYN_RCVD:
1809 case NES_CM_STATE_SYN_SENT:
1810 case NES_CM_STATE_ESTABLISHED:
1811 case NES_CM_STATE_MPAREJ_RCVD:
1812 cm_node->tcp_cntxt.rcv_nxt++;
1813 cleanup_retrans_entry(cm_node);
1814 cm_node->state = NES_CM_STATE_LAST_ACK;
1815 send_fin(cm_node, NULL);
1817 case NES_CM_STATE_MPAREQ_SENT:
1818 create_event(cm_node, NES_CM_EVENT_ABORTED);
1819 cm_node->tcp_cntxt.rcv_nxt++;
1820 cleanup_retrans_entry(cm_node);
1821 cm_node->state = NES_CM_STATE_CLOSED;
1822 add_ref_cm_node(cm_node);
1823 send_reset(cm_node, NULL);
1825 case NES_CM_STATE_FIN_WAIT1:
1826 cm_node->tcp_cntxt.rcv_nxt++;
1827 cleanup_retrans_entry(cm_node);
1828 cm_node->state = NES_CM_STATE_CLOSING;
1829 send_ack(cm_node, NULL);
1830 /* Wait for ACK as this is simultaneous close..
1831 * After we receive ACK, do not send anything..
1832 * Just rm the node.. Done.. */
1834 case NES_CM_STATE_FIN_WAIT2:
1835 cm_node->tcp_cntxt.rcv_nxt++;
1836 cleanup_retrans_entry(cm_node);
1837 cm_node->state = NES_CM_STATE_TIME_WAIT;
1838 send_ack(cm_node, NULL);
1839 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1841 case NES_CM_STATE_TIME_WAIT:
1842 cm_node->tcp_cntxt.rcv_nxt++;
1843 cleanup_retrans_entry(cm_node);
1844 cm_node->state = NES_CM_STATE_CLOSED;
1845 rem_ref_cm_node(cm_node->cm_core, cm_node);
1847 case NES_CM_STATE_TSA:
1849 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1850 cm_node, cm_node->state);
1856 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1857 struct tcphdr *tcph)
1860 int reset = 0; /* whether to send reset in case of err.. */
1861 atomic_inc(&cm_resets_recvd);
1862 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1863 " refcnt=%d\n", cm_node, cm_node->state,
1864 atomic_read(&cm_node->ref_count));
1865 cleanup_retrans_entry(cm_node);
1866 switch (cm_node->state) {
1867 case NES_CM_STATE_SYN_SENT:
1868 case NES_CM_STATE_MPAREQ_SENT:
1869 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1870 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1871 cm_node->listener, cm_node->state);
1872 switch (cm_node->mpa_frame_rev) {
1874 cm_node->mpa_frame_rev = IETF_MPA_V1;
1875 /* send a syn and goto syn sent state */
1876 cm_node->state = NES_CM_STATE_SYN_SENT;
1877 if (send_syn(cm_node, 0, NULL)) {
1878 active_open_err(cm_node, skb, reset);
1883 active_open_err(cm_node, skb, reset);
1887 case NES_CM_STATE_MPAREQ_RCVD:
1888 atomic_inc(&cm_node->passive_state);
1889 dev_kfree_skb_any(skb);
1891 case NES_CM_STATE_ESTABLISHED:
1892 case NES_CM_STATE_SYN_RCVD:
1893 case NES_CM_STATE_LISTENING:
1894 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1895 passive_open_err(cm_node, skb, reset);
1897 case NES_CM_STATE_TSA:
1898 active_open_err(cm_node, skb, reset);
1900 case NES_CM_STATE_CLOSED:
1903 case NES_CM_STATE_FIN_WAIT2:
1904 case NES_CM_STATE_FIN_WAIT1:
1905 case NES_CM_STATE_LAST_ACK:
1906 cm_node->cm_id->rem_ref(cm_node->cm_id);
1907 case NES_CM_STATE_TIME_WAIT:
1908 cm_node->state = NES_CM_STATE_CLOSED;
1909 rem_ref_cm_node(cm_node->cm_core, cm_node);
1919 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1922 int datasize = skb->len;
1923 u8 *dataloc = skb->data;
1925 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1928 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1930 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1931 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1932 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1933 "cm_node=%p listener=%p state=%d\n", __func__,
1934 __LINE__, cm_node, cm_node->listener,
1936 active_open_err(cm_node, skb, 1);
1938 passive_open_err(cm_node, skb, 1);
1943 switch (cm_node->state) {
1944 case NES_CM_STATE_ESTABLISHED:
1945 if (res_type == NES_MPA_REQUEST_REJECT)
1946 /*BIG problem as we are receiving the MPA.. So should
1947 * not be REJECT.. This is Passive Open.. We can
1948 * only receive it Reject for Active Open...*/
1950 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1951 type = NES_CM_EVENT_MPA_REQ;
1952 atomic_set(&cm_node->passive_state,
1953 NES_PASSIVE_STATE_INDICATED);
1955 case NES_CM_STATE_MPAREQ_SENT:
1956 cleanup_retrans_entry(cm_node);
1957 if (res_type == NES_MPA_REQUEST_REJECT) {
1958 type = NES_CM_EVENT_MPA_REJECT;
1959 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1961 type = NES_CM_EVENT_CONNECTED;
1962 cm_node->state = NES_CM_STATE_TSA;
1970 dev_kfree_skb_any(skb);
1971 create_event(cm_node, type);
1974 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1976 switch (cm_node->state) {
1977 case NES_CM_STATE_SYN_SENT:
1978 case NES_CM_STATE_MPAREQ_SENT:
1979 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1980 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1981 cm_node->listener, cm_node->state);
1982 active_open_err(cm_node, skb, 1);
1984 case NES_CM_STATE_ESTABLISHED:
1985 case NES_CM_STATE_SYN_RCVD:
1986 passive_open_err(cm_node, skb, 1);
1988 case NES_CM_STATE_TSA:
1994 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1995 struct sk_buff *skb)
1999 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
2001 active_open_err(cm_node, skb, 1);
2006 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2007 struct sk_buff *skb)
2012 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2013 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2016 seq = ntohl(tcph->seq);
2017 ack_seq = ntohl(tcph->ack_seq);
2018 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2019 if (ack_seq != loc_seq_num)
2021 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2024 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
2025 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
2026 cm_node->listener, cm_node->state);
2027 indicate_pkt_err(cm_node, skb);
2028 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
2029 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
2036 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
2037 * is created with a listener or it may comein as rexmitted packet which in
2038 * that case will be just dropped.
2040 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2041 struct tcphdr *tcph)
2047 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2049 inc_sequence = ntohl(tcph->seq);
2051 switch (cm_node->state) {
2052 case NES_CM_STATE_SYN_SENT:
2053 case NES_CM_STATE_MPAREQ_SENT:
2054 /* Rcvd syn on active open connection*/
2055 active_open_err(cm_node, skb, 1);
2057 case NES_CM_STATE_LISTENING:
2059 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2060 cm_node->listener->backlog) {
2061 nes_debug(NES_DBG_CM, "drop syn due to backlog "
2064 passive_open_err(cm_node, skb, 0);
2067 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
2070 passive_open_err(cm_node, skb, 0);
2074 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2075 BUG_ON(cm_node->send_entry);
2076 cm_node->accept_pend = 1;
2077 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2079 cm_node->state = NES_CM_STATE_SYN_RCVD;
2080 send_syn(cm_node, 1, skb);
2082 case NES_CM_STATE_CLOSED:
2083 cleanup_retrans_entry(cm_node);
2084 add_ref_cm_node(cm_node);
2085 send_reset(cm_node, skb);
2087 case NES_CM_STATE_TSA:
2088 case NES_CM_STATE_ESTABLISHED:
2089 case NES_CM_STATE_FIN_WAIT1:
2090 case NES_CM_STATE_FIN_WAIT2:
2091 case NES_CM_STATE_MPAREQ_RCVD:
2092 case NES_CM_STATE_LAST_ACK:
2093 case NES_CM_STATE_CLOSING:
2094 case NES_CM_STATE_UNKNOWN:
2101 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2102 struct tcphdr *tcph)
2108 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2110 inc_sequence = ntohl(tcph->seq);
2111 switch (cm_node->state) {
2112 case NES_CM_STATE_SYN_SENT:
2113 cleanup_retrans_entry(cm_node);
2115 if (check_syn(cm_node, tcph, skb))
2117 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2119 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
2121 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
2125 cleanup_retrans_entry(cm_node);
2126 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2127 send_mpa_request(cm_node, skb);
2128 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
2130 case NES_CM_STATE_MPAREQ_RCVD:
2131 /* passive open, so should not be here */
2132 passive_open_err(cm_node, skb, 1);
2134 case NES_CM_STATE_LISTENING:
2135 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2136 cleanup_retrans_entry(cm_node);
2137 cm_node->state = NES_CM_STATE_CLOSED;
2138 send_reset(cm_node, skb);
2140 case NES_CM_STATE_CLOSED:
2141 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2142 cleanup_retrans_entry(cm_node);
2143 add_ref_cm_node(cm_node);
2144 send_reset(cm_node, skb);
2146 case NES_CM_STATE_ESTABLISHED:
2147 case NES_CM_STATE_FIN_WAIT1:
2148 case NES_CM_STATE_FIN_WAIT2:
2149 case NES_CM_STATE_LAST_ACK:
2150 case NES_CM_STATE_TSA:
2151 case NES_CM_STATE_CLOSING:
2152 case NES_CM_STATE_UNKNOWN:
2153 case NES_CM_STATE_MPAREQ_SENT:
2160 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2161 struct tcphdr *tcph)
2168 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2170 if (check_seq(cm_node, tcph, skb))
2173 skb_pull(skb, tcph->doff << 2);
2174 inc_sequence = ntohl(tcph->seq);
2175 datasize = skb->len;
2176 switch (cm_node->state) {
2177 case NES_CM_STATE_SYN_RCVD:
2179 cleanup_retrans_entry(cm_node);
2180 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2183 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2184 cm_node->state = NES_CM_STATE_ESTABLISHED;
2186 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2187 nes_get_remote_addr(cm_node);
2188 handle_rcv_mpa(cm_node, skb);
2189 } else { /* rcvd ACK only */
2190 dev_kfree_skb_any(skb);
2193 case NES_CM_STATE_ESTABLISHED:
2195 cleanup_retrans_entry(cm_node);
2197 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2198 handle_rcv_mpa(cm_node, skb);
2203 case NES_CM_STATE_MPAREQ_SENT:
2204 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2206 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2207 handle_rcv_mpa(cm_node, skb);
2208 } else { /* Could be just an ack pkt.. */
2209 dev_kfree_skb_any(skb);
2212 case NES_CM_STATE_LISTENING:
2213 cleanup_retrans_entry(cm_node);
2214 cm_node->state = NES_CM_STATE_CLOSED;
2215 send_reset(cm_node, skb);
2217 case NES_CM_STATE_CLOSED:
2218 cleanup_retrans_entry(cm_node);
2219 add_ref_cm_node(cm_node);
2220 send_reset(cm_node, skb);
2222 case NES_CM_STATE_LAST_ACK:
2223 case NES_CM_STATE_CLOSING:
2224 cleanup_retrans_entry(cm_node);
2225 cm_node->state = NES_CM_STATE_CLOSED;
2226 cm_node->cm_id->rem_ref(cm_node->cm_id);
2227 rem_ref_cm_node(cm_node->cm_core, cm_node);
2230 case NES_CM_STATE_FIN_WAIT1:
2231 cleanup_retrans_entry(cm_node);
2233 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2235 case NES_CM_STATE_SYN_SENT:
2236 case NES_CM_STATE_FIN_WAIT2:
2237 case NES_CM_STATE_TSA:
2238 case NES_CM_STATE_MPAREQ_RCVD:
2239 case NES_CM_STATE_UNKNOWN:
2241 cleanup_retrans_entry(cm_node);
2250 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2251 struct sk_buff *skb, int optionsize, int passive)
2253 u8 *optionsloc = (u8 *)&tcph[1];
2256 if (process_options(cm_node, optionsloc, optionsize,
2258 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2261 passive_open_err(cm_node, skb, 1);
2263 active_open_err(cm_node, skb, 1);
2268 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2269 cm_node->tcp_cntxt.snd_wscale;
2271 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2272 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2277 * active_open_err() will send reset() if flag set..
2278 * It will also send ABORT event.
2280 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2283 cleanup_retrans_entry(cm_node);
2285 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2286 "state=%d\n", cm_node, cm_node->state);
2287 add_ref_cm_node(cm_node);
2288 send_reset(cm_node, skb);
2290 dev_kfree_skb_any(skb);
2293 cm_node->state = NES_CM_STATE_CLOSED;
2294 create_event(cm_node, NES_CM_EVENT_ABORTED);
2298 * passive_open_err() will either do a reset() or will free up the skb and
2299 * remove the cm_node.
2301 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2304 cleanup_retrans_entry(cm_node);
2305 cm_node->state = NES_CM_STATE_CLOSED;
2307 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2308 "cm_node=%p state =%d\n", cm_node, cm_node->state);
2309 send_reset(cm_node, skb);
2311 dev_kfree_skb_any(skb);
2312 rem_ref_cm_node(cm_node->cm_core, cm_node);
2317 * free_retrans_entry() routines assumes that the retrans_list_lock has
2318 * been acquired before calling.
2320 static void free_retrans_entry(struct nes_cm_node *cm_node)
2322 struct nes_timer_entry *send_entry;
2324 send_entry = cm_node->send_entry;
2326 cm_node->send_entry = NULL;
2327 dev_kfree_skb_any(send_entry->skb);
2329 rem_ref_cm_node(cm_node->cm_core, cm_node);
2333 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2335 unsigned long flags;
2337 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2338 free_retrans_entry(cm_node);
2339 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2344 * Returns skb if to be freed, else it will return NULL if already used..
2346 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2347 struct nes_cm_core *cm_core)
2349 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2350 struct tcphdr *tcph = tcp_hdr(skb);
2354 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2356 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2357 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2358 tcph->ack, tcph->rst, tcph->fin);
2361 pkt_type = NES_PKT_TYPE_RST;
2362 } else if (tcph->syn) {
2363 pkt_type = NES_PKT_TYPE_SYN;
2365 pkt_type = NES_PKT_TYPE_SYNACK;
2366 } else if (tcph->ack) {
2367 pkt_type = NES_PKT_TYPE_ACK;
2373 case NES_PKT_TYPE_SYN:
2374 handle_syn_pkt(cm_node, skb, tcph);
2376 case NES_PKT_TYPE_SYNACK:
2377 handle_synack_pkt(cm_node, skb, tcph);
2379 case NES_PKT_TYPE_ACK:
2380 ret = handle_ack_pkt(cm_node, skb, tcph);
2381 if (fin_set && !ret)
2382 handle_fin_pkt(cm_node);
2384 case NES_PKT_TYPE_RST:
2385 handle_rst_pkt(cm_node, skb, tcph);
2388 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2389 handle_fin_pkt(cm_node);
2396 * mini_cm_listen - create a listen node with params
2398 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2399 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2401 struct nes_cm_listener *listener;
2402 struct iwpm_dev_data pm_reg_msg;
2403 struct iwpm_sa_data pm_msg;
2404 unsigned long flags;
2407 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2408 cm_info->loc_addr, cm_info->loc_port);
2410 /* cannot have multiple matching listeners */
2411 listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2412 NES_CM_LISTENER_EITHER_STATE, 1);
2414 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2415 /* find automatically incs ref count ??? */
2416 atomic_dec(&listener->ref_count);
2417 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2422 nes_form_reg_msg(nesvnic, &pm_reg_msg);
2423 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
2425 nes_debug(NES_DBG_NLMSG,
2426 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
2428 if (iwpm_valid_pid() && !iwpm_err) {
2429 nes_form_pm_msg(cm_info, &pm_msg);
2430 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_NES);
2432 nes_debug(NES_DBG_NLMSG,
2433 "Port Mapper query fail (err = %d).\n", iwpm_err);
2435 nes_record_pm_msg(cm_info, &pm_msg);
2438 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2439 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2441 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2445 listener->loc_addr = cm_info->loc_addr;
2446 listener->loc_port = cm_info->loc_port;
2447 listener->mapped_loc_addr = cm_info->mapped_loc_addr;
2448 listener->mapped_loc_port = cm_info->mapped_loc_port;
2449 listener->reused_node = 0;
2451 atomic_set(&listener->ref_count, 1);
2454 /* find already inc'ed the ref count */
2456 listener->reused_node = 1;
2459 listener->cm_id = cm_info->cm_id;
2460 atomic_set(&listener->pend_accepts_cnt, 0);
2461 listener->cm_core = cm_core;
2462 listener->nesvnic = nesvnic;
2463 atomic_inc(&cm_core->node_cnt);
2465 listener->conn_type = cm_info->conn_type;
2466 listener->backlog = cm_info->backlog;
2467 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2469 if (!listener->reused_node) {
2470 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2471 list_add(&listener->list, &cm_core->listen_list.list);
2472 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2473 atomic_inc(&cm_core->listen_node_cnt);
2476 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2477 " listener = %p, backlog = %d, cm_id = %p.\n",
2478 cm_info->loc_addr, cm_info->loc_port,
2479 listener, listener->backlog, listener->cm_id);
2486 * mini_cm_connect - make a connection node with params
2488 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2489 struct nes_vnic *nesvnic, u16 private_data_len,
2490 void *private_data, struct nes_cm_info *cm_info)
2493 struct nes_cm_node *cm_node;
2494 struct nes_cm_listener *loopbackremotelistener;
2495 struct nes_cm_node *loopbackremotenode;
2496 struct nes_cm_info loopback_cm_info;
2499 /* create a CM connection node */
2500 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2504 /* set our node side to client (active) side */
2505 cm_node->tcp_cntxt.client = 1;
2506 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2508 if (cm_info->loc_addr == cm_info->rem_addr) {
2509 loopbackremotelistener = find_listener(cm_core,
2510 cm_node->mapped_loc_addr, cm_node->mapped_rem_port,
2511 NES_CM_LISTENER_ACTIVE_STATE, 0);
2512 if (loopbackremotelistener == NULL) {
2513 create_event(cm_node, NES_CM_EVENT_ABORTED);
2515 loopback_cm_info = *cm_info;
2516 loopback_cm_info.loc_port = cm_info->rem_port;
2517 loopback_cm_info.rem_port = cm_info->loc_port;
2518 loopback_cm_info.mapped_loc_port =
2519 cm_info->mapped_rem_port;
2520 loopback_cm_info.mapped_rem_port =
2521 cm_info->mapped_loc_port;
2522 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2523 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2524 &loopback_cm_info, loopbackremotelistener);
2525 if (!loopbackremotenode) {
2526 rem_ref_cm_node(cm_node->cm_core, cm_node);
2529 atomic_inc(&cm_loopbacks);
2530 loopbackremotenode->loopbackpartner = cm_node;
2531 loopbackremotenode->tcp_cntxt.rcv_wscale =
2532 NES_CM_DEFAULT_RCV_WND_SCALE;
2533 cm_node->loopbackpartner = loopbackremotenode;
2534 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2536 loopbackremotenode->mpa_frame_size = private_data_len;
2538 /* we are done handling this state. */
2539 /* set node to a TSA state */
2540 cm_node->state = NES_CM_STATE_TSA;
2541 cm_node->tcp_cntxt.rcv_nxt =
2542 loopbackremotenode->tcp_cntxt.loc_seq_num;
2543 loopbackremotenode->tcp_cntxt.rcv_nxt =
2544 cm_node->tcp_cntxt.loc_seq_num;
2545 cm_node->tcp_cntxt.max_snd_wnd =
2546 loopbackremotenode->tcp_cntxt.rcv_wnd;
2547 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2548 cm_node->tcp_cntxt.rcv_wnd;
2549 cm_node->tcp_cntxt.snd_wnd =
2550 loopbackremotenode->tcp_cntxt.rcv_wnd;
2551 loopbackremotenode->tcp_cntxt.snd_wnd =
2552 cm_node->tcp_cntxt.rcv_wnd;
2553 cm_node->tcp_cntxt.snd_wscale =
2554 loopbackremotenode->tcp_cntxt.rcv_wscale;
2555 loopbackremotenode->tcp_cntxt.snd_wscale =
2556 cm_node->tcp_cntxt.rcv_wscale;
2557 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2558 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2563 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2564 cm_node->mpa_frame_size = private_data_len;
2566 memcpy(start_buff, private_data, private_data_len);
2568 /* send a syn and goto syn sent state */
2569 cm_node->state = NES_CM_STATE_SYN_SENT;
2570 ret = send_syn(cm_node, 0, NULL);
2573 /* error in sending the syn free up the cm_node struct */
2574 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2575 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2576 cm_node->rem_addr, cm_node->rem_port, cm_node,
2578 rem_ref_cm_node(cm_node->cm_core, cm_node);
2583 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2584 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2585 cm_node->rem_addr, cm_node->rem_port, cm_node,
2594 * mini_cm_accept - accept a connection
2595 * This function is never called
2597 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2604 * mini_cm_reject - reject and teardown a connection
2606 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2611 struct nes_cm_event event;
2612 struct iw_cm_id *cm_id = cm_node->cm_id;
2613 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2615 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2616 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2618 if (cm_node->tcp_cntxt.client)
2620 cleanup_retrans_entry(cm_node);
2623 passive_state = atomic_add_return(1, &cm_node->passive_state);
2624 if (passive_state == NES_SEND_RESET_EVENT) {
2625 cm_node->state = NES_CM_STATE_CLOSED;
2626 rem_ref_cm_node(cm_core, cm_node);
2628 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2629 rem_ref_cm_node(cm_core, cm_node);
2631 ret = send_mpa_reject(cm_node);
2633 cm_node->state = NES_CM_STATE_CLOSED;
2634 err = send_reset(cm_node, NULL);
2638 cm_id->add_ref(cm_id);
2643 cm_node->cm_id = NULL;
2644 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2645 rem_ref_cm_node(cm_core, cm_node);
2646 rem_ref_cm_node(cm_core, loopback);
2648 event.cm_node = loopback;
2649 event.cm_info.rem_addr = loopback->rem_addr;
2650 event.cm_info.loc_addr = loopback->loc_addr;
2651 event.cm_info.rem_port = loopback->rem_port;
2652 event.cm_info.loc_port = loopback->loc_port;
2653 event.cm_info.cm_id = loopback->cm_id;
2654 cm_event_mpa_reject(&event);
2655 rem_ref_cm_node(cm_core, cm_node);
2656 loopback->state = NES_CM_STATE_CLOSING;
2658 cm_id = loopback->cm_id;
2659 rem_ref_cm_node(cm_core, loopback);
2660 cm_id->rem_ref(cm_id);
2671 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2675 if (!cm_core || !cm_node)
2678 switch (cm_node->state) {
2679 case NES_CM_STATE_SYN_RCVD:
2680 case NES_CM_STATE_SYN_SENT:
2681 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2682 case NES_CM_STATE_ESTABLISHED:
2683 case NES_CM_STATE_ACCEPTING:
2684 case NES_CM_STATE_MPAREQ_SENT:
2685 case NES_CM_STATE_MPAREQ_RCVD:
2686 cleanup_retrans_entry(cm_node);
2687 send_reset(cm_node, NULL);
2689 case NES_CM_STATE_CLOSE_WAIT:
2690 cm_node->state = NES_CM_STATE_LAST_ACK;
2691 send_fin(cm_node, NULL);
2693 case NES_CM_STATE_FIN_WAIT1:
2694 case NES_CM_STATE_FIN_WAIT2:
2695 case NES_CM_STATE_LAST_ACK:
2696 case NES_CM_STATE_TIME_WAIT:
2697 case NES_CM_STATE_CLOSING:
2700 case NES_CM_STATE_LISTENING:
2701 cleanup_retrans_entry(cm_node);
2702 send_reset(cm_node, NULL);
2704 case NES_CM_STATE_MPAREJ_RCVD:
2705 case NES_CM_STATE_UNKNOWN:
2706 case NES_CM_STATE_INITED:
2707 case NES_CM_STATE_CLOSED:
2708 case NES_CM_STATE_LISTENER_DESTROYED:
2709 ret = rem_ref_cm_node(cm_core, cm_node);
2711 case NES_CM_STATE_TSA:
2712 if (cm_node->send_entry)
2713 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2714 "send_entry=%p\n", cm_node->send_entry);
2715 ret = rem_ref_cm_node(cm_core, cm_node);
2723 * recv_pkt - recv an ETHERNET packet, and process it through CM
2724 * node state machine
2726 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2727 struct nes_vnic *nesvnic, struct sk_buff *skb)
2729 struct nes_cm_node *cm_node = NULL;
2730 struct nes_cm_listener *listener = NULL;
2732 struct tcphdr *tcph;
2733 struct nes_cm_info nfo;
2734 int skb_handled = 1;
2735 __be32 tmp_daddr, tmp_saddr;
2739 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2742 iph = (struct iphdr *)skb->data;
2743 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2745 nfo.loc_addr = ntohl(iph->daddr);
2746 nfo.loc_port = ntohs(tcph->dest);
2747 nfo.rem_addr = ntohl(iph->saddr);
2748 nfo.rem_port = ntohs(tcph->source);
2750 /* If port mapper is available these should be mapped address info */
2751 nfo.mapped_loc_addr = ntohl(iph->daddr);
2752 nfo.mapped_loc_port = ntohs(tcph->dest);
2753 nfo.mapped_rem_addr = ntohl(iph->saddr);
2754 nfo.mapped_rem_port = ntohs(tcph->source);
2756 tmp_daddr = cpu_to_be32(iph->daddr);
2757 tmp_saddr = cpu_to_be32(iph->saddr);
2759 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2760 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2763 cm_node = find_node(cm_core,
2764 nfo.mapped_rem_port, nfo.mapped_rem_addr,
2765 nfo.mapped_loc_port, nfo.mapped_loc_addr);
2768 /* Only type of packet accepted are for */
2769 /* the PASSIVE open (syn only) */
2770 if ((!tcph->syn) || (tcph->ack)) {
2774 listener = find_listener(cm_core, nfo.mapped_loc_addr,
2775 nfo.mapped_loc_port,
2776 NES_CM_LISTENER_ACTIVE_STATE, 0);
2780 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2784 nfo.cm_id = listener->cm_id;
2785 nfo.conn_type = listener->conn_type;
2786 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2789 nes_debug(NES_DBG_CM, "Unable to allocate "
2791 cm_packets_dropped++;
2792 atomic_dec(&listener->ref_count);
2793 dev_kfree_skb_any(skb);
2796 if (!tcph->rst && !tcph->fin) {
2797 cm_node->state = NES_CM_STATE_LISTENING;
2799 cm_packets_dropped++;
2800 rem_ref_cm_node(cm_core, cm_node);
2801 dev_kfree_skb_any(skb);
2804 add_ref_cm_node(cm_node);
2805 } else if (cm_node->state == NES_CM_STATE_TSA) {
2806 if (cm_node->nesqp->pau_mode)
2807 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2809 rem_ref_cm_node(cm_core, cm_node);
2810 atomic_inc(&cm_accel_dropped_pkts);
2811 dev_kfree_skb_any(skb);
2815 skb_reset_network_header(skb);
2816 skb_set_transport_header(skb, sizeof(*tcph));
2817 skb->len = ntohs(iph->tot_len);
2818 process_packet(cm_node, skb, cm_core);
2819 rem_ref_cm_node(cm_core, cm_node);
2826 * nes_cm_alloc_core - allocate a top level instance of a cm core
2828 static struct nes_cm_core *nes_cm_alloc_core(void)
2830 struct nes_cm_core *cm_core;
2832 /* setup the CM core */
2833 /* alloc top level core control structure */
2834 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2838 INIT_LIST_HEAD(&cm_core->connected_nodes);
2839 init_timer(&cm_core->tcp_timer);
2840 cm_core->tcp_timer.function = nes_cm_timer_tick;
2842 cm_core->mtu = NES_CM_DEFAULT_MTU;
2843 cm_core->state = NES_CM_STATE_INITED;
2844 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2846 atomic_set(&cm_core->events_posted, 0);
2848 cm_core->api = &nes_cm_api;
2850 spin_lock_init(&cm_core->ht_lock);
2851 spin_lock_init(&cm_core->listen_list_lock);
2853 INIT_LIST_HEAD(&cm_core->listen_list.list);
2855 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2857 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2858 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2859 if (!cm_core->event_wq)
2860 goto out_free_cmcore;
2861 cm_core->post_event = nes_cm_post_event;
2862 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2863 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2864 if (!cm_core->disconn_wq)
2867 print_core(cm_core);
2871 destroy_workqueue(cm_core->event_wq);
2879 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2881 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2883 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2890 if (timer_pending(&cm_core->tcp_timer))
2891 del_timer(&cm_core->tcp_timer);
2893 destroy_workqueue(cm_core->event_wq);
2894 destroy_workqueue(cm_core->disconn_wq);
2895 nes_debug(NES_DBG_CM, "\n");
2905 static int mini_cm_get(struct nes_cm_core *cm_core)
2907 return cm_core->state;
2914 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2919 case NES_CM_SET_PKT_SIZE:
2920 cm_core->mtu = value;
2922 case NES_CM_SET_FREE_PKT_Q_SIZE:
2923 cm_core->free_tx_pkt_max = value;
2926 /* unknown set option */
2935 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2936 * successfully exchanged when this is called
2938 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2945 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2946 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2947 NES_QPCONTEXT_MISC_DROS);
2949 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2950 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2952 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2954 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2955 cm_node->tos << NES_QPCONTEXT_MISC2_TOS_SHIFT);
2957 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2959 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2960 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2962 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2963 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2964 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2966 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2967 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2968 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2970 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2971 nesqp->nesqp_context->ts_recent = 0;
2972 nesqp->nesqp_context->ts_age = 0;
2973 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2974 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2975 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2976 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2977 cm_node->tcp_cntxt.rcv_wscale);
2978 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2979 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2980 nesqp->nesqp_context->srtt = 0;
2981 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2982 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2983 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2984 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2985 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2986 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2988 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2989 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2990 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2991 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2992 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2993 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2994 le32_to_cpu(nesqp->nesqp_context->misc));
2995 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2996 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2997 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2999 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
3000 cm_node->state = NES_CM_STATE_TSA;
3009 int nes_cm_disconn(struct nes_qp *nesqp)
3011 struct disconn_work *work;
3013 work = kzalloc(sizeof *work, GFP_ATOMIC);
3015 return -ENOMEM; /* Timer will clean up */
3017 nes_add_ref(&nesqp->ibqp);
3018 work->nesqp = nesqp;
3019 INIT_WORK(&work->work, nes_disconnect_worker);
3020 queue_work(g_cm_core->disconn_wq, &work->work);
3026 * nes_disconnect_worker
3028 static void nes_disconnect_worker(struct work_struct *work)
3030 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3031 struct nes_qp *nesqp = dwork->nesqp;
3034 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
3035 nesqp->last_aeq, nesqp->hwqp.qp_id);
3036 nes_cm_disconn_true(nesqp);
3037 nes_rem_ref(&nesqp->ibqp);
3042 * nes_cm_disconn_true
3044 static int nes_cm_disconn_true(struct nes_qp *nesqp)
3046 unsigned long flags;
3048 struct iw_cm_id *cm_id;
3049 struct iw_cm_event cm_event;
3050 struct nes_vnic *nesvnic;
3052 u8 original_hw_tcp_state;
3053 u8 original_ibqp_state;
3054 int disconn_status = 0;
3055 int issue_disconn = 0;
3056 int issue_close = 0;
3057 int issue_flush = 0;
3058 u32 flush_q = NES_CQP_FLUSH_RQ;
3059 struct ib_event ibevent;
3062 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
3066 spin_lock_irqsave(&nesqp->lock, flags);
3067 cm_id = nesqp->cm_id;
3068 /* make sure we havent already closed this connection */
3070 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
3072 spin_unlock_irqrestore(&nesqp->lock, flags);
3076 nesvnic = to_nesvnic(nesqp->ibqp.device);
3077 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
3079 original_hw_tcp_state = nesqp->hw_tcp_state;
3080 original_ibqp_state = nesqp->ibqp_state;
3081 last_ae = nesqp->last_aeq;
3083 if (nesqp->term_flags) {
3086 nesqp->cm_id = NULL;
3087 del_timer(&nesqp->terminate_timer);
3088 if (nesqp->flush_issued == 0) {
3089 nesqp->flush_issued = 1;
3092 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
3093 ((original_ibqp_state == IB_QPS_RTS) &&
3094 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3096 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
3097 disconn_status = -ECONNRESET;
3100 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
3101 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
3102 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
3103 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3105 nesqp->cm_id = NULL;
3106 if (nesqp->flush_issued == 0) {
3107 nesqp->flush_issued = 1;
3112 spin_unlock_irqrestore(&nesqp->lock, flags);
3114 if ((issue_flush) && (nesqp->destroyed == 0)) {
3115 /* Flush the queue(s) */
3116 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
3117 flush_q |= NES_CQP_FLUSH_SQ;
3118 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
3120 if (nesqp->term_flags) {
3121 ibevent.device = nesqp->ibqp.device;
3122 ibevent.event = nesqp->terminate_eventtype;
3123 ibevent.element.qp = &nesqp->ibqp;
3124 if (nesqp->ibqp.event_handler)
3125 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
3129 if ((cm_id) && (cm_id->event_handler)) {
3130 if (issue_disconn) {
3131 atomic_inc(&cm_disconnects);
3132 cm_event.event = IW_CM_EVENT_DISCONNECT;
3133 cm_event.status = disconn_status;
3134 cm_event.local_addr = cm_id->local_addr;
3135 cm_event.remote_addr = cm_id->remote_addr;
3136 cm_event.private_data = NULL;
3137 cm_event.private_data_len = 0;
3139 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
3140 " for QP%u, SQ Head = %u, SQ Tail = %u. "
3141 "cm_id = %p, refcount = %u.\n",
3142 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
3143 nesqp->hwqp.sq_tail, cm_id,
3144 atomic_read(&nesqp->refcount));
3146 ret = cm_id->event_handler(cm_id, &cm_event);
3148 nes_debug(NES_DBG_CM, "OFA CM event_handler "
3149 "returned, ret=%d\n", ret);
3153 atomic_inc(&cm_closes);
3154 nes_disconnect(nesqp, 1);
3156 cm_id->provider_data = nesqp;
3157 /* Send up the close complete event */
3158 cm_event.event = IW_CM_EVENT_CLOSE;
3159 cm_event.status = 0;
3160 cm_event.provider_data = cm_id->provider_data;
3161 cm_event.local_addr = cm_id->local_addr;
3162 cm_event.remote_addr = cm_id->remote_addr;
3163 cm_event.private_data = NULL;
3164 cm_event.private_data_len = 0;
3166 ret = cm_id->event_handler(cm_id, &cm_event);
3168 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3170 cm_id->rem_ref(cm_id);
3181 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3184 struct nes_vnic *nesvnic;
3185 struct nes_device *nesdev;
3186 struct nes_ib_device *nesibdev;
3188 nesvnic = to_nesvnic(nesqp->ibqp.device);
3192 nesdev = nesvnic->nesdev;
3193 nesibdev = nesvnic->nesibdev;
3195 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3196 netdev_refcnt_read(nesvnic->netdev));
3198 if (nesqp->active_conn) {
3200 /* indicate this connection is NOT active */
3201 nesqp->active_conn = 0;
3203 /* Need to free the Last Streaming Mode Message */
3204 if (nesqp->ietf_frame) {
3206 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3207 pci_free_consistent(nesdev->pcidev,
3208 nesqp->private_data_len + nesqp->ietf_frame_size,
3209 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3213 /* close the CM node down if it is still active */
3214 if (nesqp->cm_node) {
3215 nes_debug(NES_DBG_CM, "Call close API\n");
3217 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3227 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3231 struct nes_qp *nesqp;
3232 struct nes_vnic *nesvnic;
3233 struct nes_device *nesdev;
3234 struct nes_cm_node *cm_node;
3235 struct nes_adapter *adapter;
3236 struct ib_qp_attr attr;
3237 struct iw_cm_event cm_event;
3238 struct nes_hw_qp_wqe *wqe;
3239 struct nes_v4_quad nes_quad;
3243 struct nes_ib_device *nesibdev;
3244 struct ib_mr *ibmr = NULL;
3245 struct nes_pd *nespd;
3247 u8 mpa_frame_offset = 0;
3248 struct ietf_mpa_v2 *mpa_v2_frame;
3250 u8 *start_ptr = &start_addr;
3251 u8 **start_buff = &start_ptr;
3253 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3254 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3256 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3260 /* get all our handles */
3261 nesqp = to_nesqp(ibqp);
3262 nesvnic = to_nesvnic(nesqp->ibqp.device);
3263 nesdev = nesvnic->nesdev;
3264 adapter = nesdev->nesadapter;
3266 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3267 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3268 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3269 nesvnic->netdev->name);
3271 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3272 if (cm_node->loopbackpartner)
3273 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3274 rem_ref_cm_node(cm_node->cm_core, cm_node);
3278 passive_state = atomic_add_return(1, &cm_node->passive_state);
3279 if (passive_state == NES_SEND_RESET_EVENT) {
3280 rem_ref_cm_node(cm_node->cm_core, cm_node);
3283 /* associate the node with the QP */
3284 nesqp->cm_node = (void *)cm_node;
3285 cm_node->nesqp = nesqp;
3288 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3289 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3290 atomic_inc(&cm_accepts);
3292 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3293 netdev_refcnt_read(nesvnic->netdev));
3295 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3296 /* allocate the ietf frame and space for private data */
3297 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3298 nesqp->ietf_frame_size + conn_param->private_data_len,
3299 &nesqp->ietf_frame_pbase);
3301 if (!nesqp->ietf_frame) {
3302 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3305 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3307 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3308 mpa_frame_offset = 4;
3310 if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3311 cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3312 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3315 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3316 conn_param->private_data_len);
3318 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3319 nesqp->private_data_len = conn_param->private_data_len;
3321 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3322 wqe = &nesqp->hwqp.sq_vbase[0];
3324 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3325 u64temp = (unsigned long)nesqp;
3326 nesibdev = nesvnic->nesibdev;
3327 nespd = nesqp->nespd;
3328 tagged_offset = (u64)(unsigned long)*start_buff;
3329 ibmr = nes_reg_phys_mr(&nespd->ibpd,
3330 nesqp->ietf_frame_pbase + mpa_frame_offset,
3331 buff_len, IB_ACCESS_LOCAL_WRITE,
3334 nes_debug(NES_DBG_CM, "Unable to register memory region"
3335 "for lSMM for cm_node = %p \n",
3337 pci_free_consistent(nesdev->pcidev,
3338 nesqp->private_data_len + nesqp->ietf_frame_size,
3339 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3340 return PTR_ERR(ibmr);
3343 ibmr->pd = &nespd->ibpd;
3344 ibmr->device = nespd->ibpd.device;
3345 nesqp->lsmm_mr = ibmr;
3347 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3348 set_wqe_64bit_value(wqe->wqe_words,
3349 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3351 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3352 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3353 NES_IWARP_SQ_WQE_WRPDU);
3354 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3355 cpu_to_le32(buff_len);
3356 set_wqe_64bit_value(wqe->wqe_words,
3357 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3358 (u64)(unsigned long)(*start_buff));
3359 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3360 cpu_to_le32(buff_len);
3361 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3362 if (nesqp->sq_kmapped) {
3363 nesqp->sq_kmapped = 0;
3364 kunmap(nesqp->page);
3367 nesqp->nesqp_context->ird_ord_sizes |=
3368 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3369 NES_QPCONTEXT_ORDIRD_WRPDU);
3371 nesqp->nesqp_context->ird_ord_sizes |=
3372 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3374 nesqp->skip_lsmm = 1;
3376 /* Cache the cm_id in the qp */
3377 nesqp->cm_id = cm_id;
3378 cm_node->cm_id = cm_id;
3380 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3381 cm_id->provider_data = nesqp;
3382 nesqp->active_conn = 0;
3384 if (cm_node->state == NES_CM_STATE_TSA)
3385 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3388 nes_cm_init_tsa_conn(nesqp, cm_node);
3390 nesqp->nesqp_context->tcpPorts[0] =
3391 cpu_to_le16(cm_node->mapped_loc_port);
3392 nesqp->nesqp_context->tcpPorts[1] =
3393 cpu_to_le16(cm_node->mapped_rem_port);
3395 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3397 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3398 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3399 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3401 nesqp->nesqp_context->arp_index_vlan |=
3402 cpu_to_le32(nes_arp_table(nesdev,
3403 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3404 NES_ARP_RESOLVE) << 16);
3406 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3407 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3409 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3411 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3412 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3413 nesqp->nesqp_context->ird_ord_sizes |=
3414 cpu_to_le32((u32)cm_node->ord_size);
3416 memset(&nes_quad, 0, sizeof(nes_quad));
3417 nes_quad.DstIpAdrIndex =
3418 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3419 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3420 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3421 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3423 /* Produce hash key */
3424 crc_value = get_crc_value(&nes_quad);
3425 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3426 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3427 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3429 nesqp->hte_index &= adapter->hte_index_mask;
3430 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3432 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3434 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3435 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3436 "private data length=%u.\n", nesqp->hwqp.qp_id,
3437 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3438 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3439 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3440 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3443 /* notify OF layer that accept event was successful */
3444 cm_id->add_ref(cm_id);
3445 nes_add_ref(&nesqp->ibqp);
3447 cm_event.event = IW_CM_EVENT_ESTABLISHED;
3448 cm_event.status = 0;
3449 cm_event.provider_data = (void *)nesqp;
3450 cm_event.local_addr = cm_id->local_addr;
3451 cm_event.remote_addr = cm_id->remote_addr;
3452 cm_event.private_data = NULL;
3453 cm_event.private_data_len = 0;
3454 cm_event.ird = cm_node->ird_size;
3455 cm_event.ord = cm_node->ord_size;
3457 ret = cm_id->event_handler(cm_id, &cm_event);
3458 attr.qp_state = IB_QPS_RTS;
3459 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3460 if (cm_node->loopbackpartner) {
3461 cm_node->loopbackpartner->mpa_frame_size =
3462 nesqp->private_data_len;
3463 /* copy entire MPA frame to our cm_node's frame */
3464 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3465 conn_param->private_data, conn_param->private_data_len);
3466 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3469 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3470 "ret=%d\n", __func__, __LINE__, ret);
3479 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3481 struct nes_cm_node *cm_node;
3482 struct nes_cm_node *loopback;
3483 struct nes_cm_core *cm_core;
3486 atomic_inc(&cm_rejects);
3487 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3488 loopback = cm_node->loopbackpartner;
3489 cm_core = cm_node->cm_core;
3490 cm_node->cm_id = cm_id;
3492 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3496 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3497 loopback->mpa_frame.priv_data_len = pdata_len;
3498 loopback->mpa_frame_size = pdata_len;
3500 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3501 cm_node->mpa_frame_size = pdata_len;
3502 memcpy(start_buff, pdata, pdata_len);
3504 return cm_core->api->reject(cm_core, cm_node);
3510 * setup and launch cm connect node
3512 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3515 struct nes_qp *nesqp;
3516 struct nes_vnic *nesvnic;
3517 struct nes_device *nesdev;
3518 struct nes_cm_node *cm_node;
3519 struct nes_cm_info cm_info;
3521 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3522 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3523 struct iwpm_dev_data pm_reg_msg;
3524 struct iwpm_sa_data pm_msg;
3527 if (cm_id->remote_addr.ss_family != AF_INET)
3529 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3532 nesqp = to_nesqp(ibqp);
3535 nesvnic = to_nesvnic(nesqp->ibqp.device);
3538 nesdev = nesvnic->nesdev;
3542 if (!laddr->sin_port || !raddr->sin_port)
3545 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3546 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3547 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3548 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3549 ntohs(laddr->sin_port));
3551 atomic_inc(&cm_connects);
3552 nesqp->active_conn = 1;
3554 /* cache the cm_id in the qp */
3555 nesqp->cm_id = cm_id;
3556 cm_id->provider_data = nesqp;
3557 nesqp->private_data_len = conn_param->private_data_len;
3559 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3560 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3561 conn_param->private_data_len);
3563 /* set up the connection params for the node */
3564 cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3565 cm_info.loc_port = ntohs(laddr->sin_port);
3566 cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3567 cm_info.rem_port = ntohs(raddr->sin_port);
3568 cm_info.cm_id = cm_id;
3569 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3571 /* No port mapper available, go with the specified peer information */
3572 cm_info.mapped_loc_addr = cm_info.loc_addr;
3573 cm_info.mapped_loc_port = cm_info.loc_port;
3574 cm_info.mapped_rem_addr = cm_info.rem_addr;
3575 cm_info.mapped_rem_port = cm_info.rem_port;
3577 nes_form_reg_msg(nesvnic, &pm_reg_msg);
3578 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
3580 nes_debug(NES_DBG_NLMSG,
3581 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
3583 if (iwpm_valid_pid() && !iwpm_err) {
3584 nes_form_pm_msg(&cm_info, &pm_msg);
3585 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_NES);
3587 nes_debug(NES_DBG_NLMSG,
3588 "Port Mapper query fail (err = %d).\n", iwpm_err);
3590 nes_record_pm_msg(&cm_info, &pm_msg);
3593 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3594 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3595 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3599 if (nes_create_mapinfo(&cm_info))
3602 cm_id->add_ref(cm_id);
3604 /* create a connect CM node connection */
3605 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3606 conn_param->private_data_len, (void *)conn_param->private_data,
3610 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3611 PCI_FUNC(nesdev->pcidev->devfn),
3612 NES_MANAGE_APBVT_DEL);
3614 nes_debug(NES_DBG_NLMSG, "Delete mapped_loc_port = %04X\n",
3615 cm_info.mapped_loc_port);
3616 nes_remove_mapinfo(cm_info.loc_addr, cm_info.loc_port,
3617 cm_info.mapped_loc_addr, cm_info.mapped_loc_port);
3618 cm_id->rem_ref(cm_id);
3622 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3623 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3624 cm_node->ord_size == 0)
3625 cm_node->ord_size = 1;
3627 cm_node->apbvt_set = apbvt_set;
3628 cm_node->tos = cm_id->tos;
3629 nesqp->cm_node = cm_node;
3630 cm_node->nesqp = nesqp;
3631 nes_add_ref(&nesqp->ibqp);
3640 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3642 struct nes_vnic *nesvnic;
3643 struct nes_cm_listener *cm_node;
3644 struct nes_cm_info cm_info;
3646 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3648 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3649 cm_id, ntohs(laddr->sin_port));
3651 if (cm_id->local_addr.ss_family != AF_INET)
3653 nesvnic = to_nesvnic(cm_id->device);
3657 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3658 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3660 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3661 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3663 /* setup listen params in our api call struct */
3664 cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3665 cm_info.loc_port = ntohs(laddr->sin_port);
3666 cm_info.backlog = backlog;
3667 cm_info.cm_id = cm_id;
3669 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3671 /* No port mapper available, go with the specified info */
3672 cm_info.mapped_loc_addr = cm_info.loc_addr;
3673 cm_info.mapped_loc_port = cm_info.loc_port;
3675 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3677 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3678 __func__, __LINE__);
3682 cm_id->provider_data = cm_node;
3683 cm_node->tos = cm_id->tos;
3685 if (!cm_node->reused_node) {
3686 if (nes_create_mapinfo(&cm_info))
3689 err = nes_manage_apbvt(nesvnic, cm_node->mapped_loc_port,
3690 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3691 NES_MANAGE_APBVT_ADD);
3693 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3695 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3698 atomic_inc(&cm_listens_created);
3701 cm_id->add_ref(cm_id);
3702 cm_id->provider_data = (void *)cm_node;
3710 * nes_destroy_listen
3712 int nes_destroy_listen(struct iw_cm_id *cm_id)
3714 if (cm_id->provider_data)
3715 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3717 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3719 cm_id->rem_ref(cm_id);
3728 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3732 cm_packets_received++;
3733 if ((g_cm_core) && (g_cm_core->api))
3734 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3736 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3737 " cm is not setup properly.\n");
3745 * Start and init a cm core module
3747 int nes_cm_start(void)
3749 nes_debug(NES_DBG_CM, "\n");
3750 /* create the primary CM core, pass this handle to subsequent core inits */
3751 g_cm_core = nes_cm_alloc_core();
3761 * stop and dealloc all cm core instances
3763 int nes_cm_stop(void)
3765 g_cm_core->api->destroy_cm_core(g_cm_core);
3771 * cm_event_connected
3772 * handle a connected event, setup QPs and HW
3774 static void cm_event_connected(struct nes_cm_event *event)
3776 struct nes_qp *nesqp;
3777 struct nes_vnic *nesvnic;
3778 struct nes_device *nesdev;
3779 struct nes_cm_node *cm_node;
3780 struct nes_adapter *nesadapter;
3781 struct ib_qp_attr attr;
3782 struct iw_cm_id *cm_id;
3783 struct iw_cm_event cm_event;
3784 struct nes_v4_quad nes_quad;
3787 struct sockaddr_in *laddr;
3788 struct sockaddr_in *raddr;
3789 struct sockaddr_in *cm_event_laddr;
3791 /* get all our handles */
3792 cm_node = event->cm_node;
3793 cm_id = cm_node->cm_id;
3794 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3795 nesqp = (struct nes_qp *)cm_id->provider_data;
3796 nesvnic = to_nesvnic(nesqp->ibqp.device);
3797 nesdev = nesvnic->nesdev;
3798 nesadapter = nesdev->nesadapter;
3799 laddr = (struct sockaddr_in *)&cm_id->local_addr;
3800 raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3801 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3803 if (nesqp->destroyed)
3805 atomic_inc(&cm_connecteds);
3806 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3807 " local port 0x%04X. jiffies = %lu.\n",
3808 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3809 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3811 nes_cm_init_tsa_conn(nesqp, cm_node);
3813 /* set the QP tsa context */
3814 nesqp->nesqp_context->tcpPorts[0] =
3815 cpu_to_le16(cm_node->mapped_loc_port);
3816 nesqp->nesqp_context->tcpPorts[1] =
3817 cpu_to_le16(cm_node->mapped_rem_port);
3818 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3820 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3821 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3822 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3823 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3824 nes_arp_table(nesdev,
3825 le32_to_cpu(nesqp->nesqp_context->ip0),
3826 NULL, NES_ARP_RESOLVE) << 16);
3827 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3828 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3829 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3830 nesqp->nesqp_context->ird_ord_sizes |=
3831 cpu_to_le32((u32)1 <<
3832 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3833 nesqp->nesqp_context->ird_ord_sizes |=
3834 cpu_to_le32((u32)cm_node->ord_size);
3836 /* Adjust tail for not having a LSMM */
3837 /*nesqp->hwqp.sq_tail = 1;*/
3839 build_rdma0_msg(cm_node, &nesqp);
3841 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3842 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3844 memset(&nes_quad, 0, sizeof(nes_quad));
3846 nes_quad.DstIpAdrIndex =
3847 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3848 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3849 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3850 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3852 /* Produce hash key */
3853 crc_value = get_crc_value(&nes_quad);
3854 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3855 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3856 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3858 nesqp->hte_index &= nesadapter->hte_index_mask;
3859 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3861 nesqp->ietf_frame = &cm_node->mpa_frame;
3862 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3863 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3865 /* notify OF layer we successfully created the requested connection */
3866 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3867 cm_event.status = 0;
3868 cm_event.provider_data = cm_id->provider_data;
3869 cm_event_laddr->sin_family = AF_INET;
3870 cm_event_laddr->sin_port = laddr->sin_port;
3871 cm_event.remote_addr = cm_id->remote_addr;
3873 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3874 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3875 cm_event.ird = cm_node->ird_size;
3876 cm_event.ord = cm_node->ord_size;
3878 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3879 ret = cm_id->event_handler(cm_id, &cm_event);
3880 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3883 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3884 "ret=%d\n", __func__, __LINE__, ret);
3885 attr.qp_state = IB_QPS_RTS;
3886 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3888 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3889 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3896 * cm_event_connect_error
3898 static void cm_event_connect_error(struct nes_cm_event *event)
3900 struct nes_qp *nesqp;
3901 struct iw_cm_id *cm_id;
3902 struct iw_cm_event cm_event;
3903 /* struct nes_cm_info cm_info; */
3906 if (!event->cm_node)
3909 cm_id = event->cm_node->cm_id;
3913 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3914 nesqp = cm_id->provider_data;
3919 /* notify OF layer about this connection error event */
3920 /* cm_id->rem_ref(cm_id); */
3921 nesqp->cm_id = NULL;
3922 cm_id->provider_data = NULL;
3923 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3924 cm_event.status = -ECONNRESET;
3925 cm_event.provider_data = cm_id->provider_data;
3926 cm_event.local_addr = cm_id->local_addr;
3927 cm_event.remote_addr = cm_id->remote_addr;
3928 cm_event.private_data = NULL;
3929 cm_event.private_data_len = 0;
3931 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3933 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3934 &cm_event.local_addr;
3935 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3936 &cm_event.remote_addr;
3937 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3938 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3942 ret = cm_id->event_handler(cm_id, &cm_event);
3943 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3945 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3946 "ret=%d\n", __func__, __LINE__, ret);
3947 cm_id->rem_ref(cm_id);
3949 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3957 static void cm_event_reset(struct nes_cm_event *event)
3959 struct nes_qp *nesqp;
3960 struct iw_cm_id *cm_id;
3961 struct iw_cm_event cm_event;
3962 /* struct nes_cm_info cm_info; */
3965 if (!event->cm_node)
3968 if (!event->cm_node->cm_id)
3971 cm_id = event->cm_node->cm_id;
3973 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3974 nesqp = cm_id->provider_data;
3978 nesqp->cm_id = NULL;
3979 /* cm_id->provider_data = NULL; */
3980 cm_event.event = IW_CM_EVENT_DISCONNECT;
3981 cm_event.status = -ECONNRESET;
3982 cm_event.provider_data = cm_id->provider_data;
3983 cm_event.local_addr = cm_id->local_addr;
3984 cm_event.remote_addr = cm_id->remote_addr;
3985 cm_event.private_data = NULL;
3986 cm_event.private_data_len = 0;
3988 cm_id->add_ref(cm_id);
3989 ret = cm_id->event_handler(cm_id, &cm_event);
3990 atomic_inc(&cm_closes);
3991 cm_event.event = IW_CM_EVENT_CLOSE;
3992 cm_event.status = 0;
3993 cm_event.provider_data = cm_id->provider_data;
3994 cm_event.local_addr = cm_id->local_addr;
3995 cm_event.remote_addr = cm_id->remote_addr;
3996 cm_event.private_data = NULL;
3997 cm_event.private_data_len = 0;
3998 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3999 ret = cm_id->event_handler(cm_id, &cm_event);
4001 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
4004 /* notify OF layer about this connection error event */
4005 cm_id->rem_ref(cm_id);
4014 static void cm_event_mpa_req(struct nes_cm_event *event)
4016 struct iw_cm_id *cm_id;
4017 struct iw_cm_event cm_event;
4019 struct nes_cm_node *cm_node;
4020 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4021 &cm_event.local_addr;
4022 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4023 &cm_event.remote_addr;
4025 cm_node = event->cm_node;
4028 cm_id = cm_node->cm_id;
4030 atomic_inc(&cm_connect_reqs);
4031 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4032 cm_node, cm_id, jiffies);
4034 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
4035 cm_event.status = 0;
4036 cm_event.provider_data = (void *)cm_node;
4038 cm_event_laddr->sin_family = AF_INET;
4039 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4040 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4042 cm_event_raddr->sin_family = AF_INET;
4043 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4044 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4045 cm_event.private_data = cm_node->mpa_frame_buf;
4046 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4047 if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
4048 cm_event.ird = NES_MAX_IRD;
4049 cm_event.ord = NES_MAX_ORD;
4051 cm_event.ird = cm_node->ird_size;
4052 cm_event.ord = cm_node->ord_size;
4055 ret = cm_id->event_handler(cm_id, &cm_event);
4057 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4058 __func__, __LINE__, ret);
4063 static void cm_event_mpa_reject(struct nes_cm_event *event)
4065 struct iw_cm_id *cm_id;
4066 struct iw_cm_event cm_event;
4067 struct nes_cm_node *cm_node;
4069 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4070 &cm_event.local_addr;
4071 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4072 &cm_event.remote_addr;
4074 cm_node = event->cm_node;
4077 cm_id = cm_node->cm_id;
4079 atomic_inc(&cm_connect_reqs);
4080 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4081 cm_node, cm_id, jiffies);
4083 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
4084 cm_event.status = -ECONNREFUSED;
4085 cm_event.provider_data = cm_id->provider_data;
4087 cm_event_laddr->sin_family = AF_INET;
4088 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4089 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4091 cm_event_raddr->sin_family = AF_INET;
4092 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4093 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4095 cm_event.private_data = cm_node->mpa_frame_buf;
4096 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4098 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
4099 "remove_addr=%08x\n",
4100 cm_event_laddr->sin_addr.s_addr,
4101 cm_event_raddr->sin_addr.s_addr);
4103 ret = cm_id->event_handler(cm_id, &cm_event);
4105 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4106 __func__, __LINE__, ret);
4112 static void nes_cm_event_handler(struct work_struct *);
4116 * post an event to the cm event handler
4118 static int nes_cm_post_event(struct nes_cm_event *event)
4120 atomic_inc(&event->cm_node->cm_core->events_posted);
4121 add_ref_cm_node(event->cm_node);
4122 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4123 INIT_WORK(&event->event_work, nes_cm_event_handler);
4124 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
4125 event->cm_node, event);
4127 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4129 nes_debug(NES_DBG_CM, "Exit\n");
4135 * nes_cm_event_handler
4136 * worker function to handle cm events
4137 * will free instance of nes_cm_event
4139 static void nes_cm_event_handler(struct work_struct *work)
4141 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
4143 struct nes_cm_core *cm_core;
4145 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
4148 cm_core = event->cm_node->cm_core;
4149 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
4150 event, event->type, atomic_read(&cm_core->events_posted));
4152 switch (event->type) {
4153 case NES_CM_EVENT_MPA_REQ:
4154 cm_event_mpa_req(event);
4155 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
4158 case NES_CM_EVENT_RESET:
4159 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
4161 cm_event_reset(event);
4163 case NES_CM_EVENT_CONNECTED:
4164 if ((!event->cm_node->cm_id) ||
4165 (event->cm_node->state != NES_CM_STATE_TSA))
4167 cm_event_connected(event);
4168 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
4170 case NES_CM_EVENT_MPA_REJECT:
4171 if ((!event->cm_node->cm_id) ||
4172 (event->cm_node->state == NES_CM_STATE_TSA))
4174 cm_event_mpa_reject(event);
4175 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
4178 case NES_CM_EVENT_ABORTED:
4179 if ((!event->cm_node->cm_id) ||
4180 (event->cm_node->state == NES_CM_STATE_TSA))
4182 cm_event_connect_error(event);
4183 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
4185 case NES_CM_EVENT_DROPPED_PKT:
4186 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
4189 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
4193 atomic_dec(&cm_core->events_posted);
4194 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4195 rem_ref_cm_node(cm_core, event->cm_node);