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 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);
600 * nes_record_pm_msg - Save the received mapping info
602 static void nes_record_pm_msg(struct nes_cm_info *cm_info,
603 struct iwpm_sa_data *pm_msg)
605 struct sockaddr_in *mapped_loc_addr =
606 (struct sockaddr_in *)&pm_msg->mapped_loc_addr;
607 struct sockaddr_in *mapped_rem_addr =
608 (struct sockaddr_in *)&pm_msg->mapped_rem_addr;
610 if (mapped_loc_addr->sin_family == AF_INET) {
611 cm_info->mapped_loc_addr =
612 ntohl(mapped_loc_addr->sin_addr.s_addr);
613 cm_info->mapped_loc_port = ntohs(mapped_loc_addr->sin_port);
615 if (mapped_rem_addr->sin_family == AF_INET) {
616 cm_info->mapped_rem_addr =
617 ntohl(mapped_rem_addr->sin_addr.s_addr);
618 cm_info->mapped_rem_port = ntohs(mapped_rem_addr->sin_port);
623 * print_core - dump a cm core
625 static void print_core(struct nes_cm_core *core)
627 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
628 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
631 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
633 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
635 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
636 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
638 nes_debug(NES_DBG_CM, "core : %p \n", core);
640 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
643 static void record_ird_ord(struct nes_cm_node *cm_node,
644 u16 conn_ird, u16 conn_ord)
646 if (conn_ird > NES_MAX_IRD)
647 conn_ird = NES_MAX_IRD;
649 if (conn_ord > NES_MAX_ORD)
650 conn_ord = NES_MAX_ORD;
652 cm_node->ird_size = conn_ird;
653 cm_node->ord_size = conn_ord;
657 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
659 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
660 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
664 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
666 switch (cm_node->mpa_frame_rev) {
668 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
669 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
670 build_mpa_v1(cm_node, *start_buff, mpa_key);
673 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
674 build_mpa_v2(cm_node, *start_buff, mpa_key);
683 * build_mpa_v2 - build a MPA V2 frame
685 static void build_mpa_v2(struct nes_cm_node *cm_node,
686 void *start_addr, u8 mpa_key)
688 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
689 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
693 /* initialize the upper 5 bytes of the frame */
694 build_mpa_v1(cm_node, start_addr, mpa_key);
695 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
696 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
698 /* initialize RTR msg */
699 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
700 ctrl_ird = IETF_NO_IRD_ORD;
701 ctrl_ord = IETF_NO_IRD_ORD;
703 ctrl_ird = cm_node->ird_size & IETF_NO_IRD_ORD;
704 ctrl_ord = cm_node->ord_size & IETF_NO_IRD_ORD;
706 ctrl_ird |= IETF_PEER_TO_PEER;
707 ctrl_ird |= IETF_FLPDU_ZERO_LEN;
710 case MPA_KEY_REQUEST:
711 ctrl_ord |= IETF_RDMA0_WRITE;
712 ctrl_ord |= IETF_RDMA0_READ;
715 switch (cm_node->send_rdma0_op) {
716 case SEND_RDMA_WRITE_ZERO:
717 ctrl_ord |= IETF_RDMA0_WRITE;
719 case SEND_RDMA_READ_ZERO:
720 ctrl_ord |= IETF_RDMA0_READ;
724 rtr_msg->ctrl_ird = htons(ctrl_ird);
725 rtr_msg->ctrl_ord = htons(ctrl_ord);
729 * build_mpa_v1 - build a MPA V1 frame
731 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
733 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
736 case MPA_KEY_REQUEST:
737 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
740 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
743 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
744 mpa_frame->rev = cm_node->mpa_frame_rev;
745 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
748 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
751 struct nes_qp *nesqp = *nesqp_addr;
752 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
754 u64temp = (unsigned long)nesqp->nesuqp_addr;
755 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
756 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
758 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
759 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
761 switch (cm_node->send_rdma0_op) {
762 case SEND_RDMA_WRITE_ZERO:
763 nes_debug(NES_DBG_CM, "Sending first write.\n");
764 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
765 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
766 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
767 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
768 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
771 case SEND_RDMA_READ_ZERO:
773 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
774 WARN(1, "Unsupported RDMA0 len operation=%u\n",
775 cm_node->send_rdma0_op);
776 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
777 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
778 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
779 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
780 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
781 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
782 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
783 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
787 if (nesqp->sq_kmapped) {
788 nesqp->sq_kmapped = 0;
792 /*use the reserved spot on the WQ for the extra first WQE*/
793 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
794 NES_QPCONTEXT_ORDIRD_WRPDU |
795 NES_QPCONTEXT_ORDIRD_ALSMM));
796 nesqp->skip_lsmm = 1;
797 nesqp->hwqp.sq_tail = 0;
802 * note - cm_node needs to be protected before calling this. Encase in:
803 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
805 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
806 enum nes_timer_type type, int send_retrans,
807 int close_when_complete)
810 struct nes_cm_core *cm_core = cm_node->cm_core;
811 struct nes_timer_entry *new_send;
814 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
818 /* new_send->timetosend = currenttime */
819 new_send->retrycount = NES_DEFAULT_RETRYS;
820 new_send->retranscount = NES_DEFAULT_RETRANS;
822 new_send->timetosend = jiffies;
823 new_send->type = type;
824 new_send->netdev = cm_node->netdev;
825 new_send->send_retrans = send_retrans;
826 new_send->close_when_complete = close_when_complete;
828 if (type == NES_TIMER_TYPE_CLOSE) {
829 new_send->timetosend += (HZ / 10);
830 if (cm_node->recv_entry) {
835 cm_node->recv_entry = new_send;
838 if (type == NES_TIMER_TYPE_SEND) {
839 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
840 atomic_inc(&new_send->skb->users);
841 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
842 cm_node->send_entry = new_send;
843 add_ref_cm_node(cm_node);
844 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
845 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
847 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
848 if (ret != NETDEV_TX_OK) {
849 nes_debug(NES_DBG_CM, "Error sending packet %p "
850 "(jiffies = %lu)\n", new_send, jiffies);
851 new_send->timetosend = jiffies;
856 cleanup_retrans_entry(cm_node);
857 if (close_when_complete)
858 rem_ref_cm_node(cm_core, cm_node);
864 if (!timer_pending(&cm_core->tcp_timer))
865 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
870 static void nes_retrans_expired(struct nes_cm_node *cm_node)
872 struct iw_cm_id *cm_id = cm_node->cm_id;
873 enum nes_cm_node_state state = cm_node->state;
874 cm_node->state = NES_CM_STATE_CLOSED;
877 case NES_CM_STATE_SYN_RCVD:
878 case NES_CM_STATE_CLOSING:
879 rem_ref_cm_node(cm_node->cm_core, cm_node);
881 case NES_CM_STATE_LAST_ACK:
882 case NES_CM_STATE_FIN_WAIT1:
884 cm_id->rem_ref(cm_id);
885 send_reset(cm_node, NULL);
888 add_ref_cm_node(cm_node);
889 send_reset(cm_node, NULL);
890 create_event(cm_node, NES_CM_EVENT_ABORTED);
894 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
896 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
897 struct iw_cm_id *cm_id = cm_node->cm_id;
898 struct nes_qp *nesqp;
899 unsigned long qplockflags;
903 nesqp = (struct nes_qp *)recv_entry->skb;
905 spin_lock_irqsave(&nesqp->lock, qplockflags);
907 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
908 "refcount = %d: HIT A "
909 "NES_TIMER_TYPE_CLOSE with something "
910 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
911 atomic_read(&nesqp->refcount));
912 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
913 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
914 nesqp->ibqp_state = IB_QPS_ERR;
915 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
916 nes_cm_disconn(nesqp);
918 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
919 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
920 "refcount = %d: HIT A "
921 "NES_TIMER_TYPE_CLOSE with nothing "
922 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
923 atomic_read(&nesqp->refcount));
925 } else if (rem_node) {
926 /* TIME_WAIT state */
927 rem_ref_cm_node(cm_node->cm_core, cm_node);
930 cm_id->rem_ref(cm_id);
932 cm_node->recv_entry = NULL;
938 static void nes_cm_timer_tick(unsigned long pass)
941 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
942 struct nes_cm_node *cm_node;
943 struct nes_timer_entry *send_entry, *recv_entry;
944 struct list_head *list_core_temp;
945 struct list_head *list_node;
946 struct nes_cm_core *cm_core = g_cm_core;
948 unsigned long timetosend;
949 int ret = NETDEV_TX_OK;
951 struct list_head timer_list;
953 INIT_LIST_HEAD(&timer_list);
954 spin_lock_irqsave(&cm_core->ht_lock, flags);
956 list_for_each_safe(list_node, list_core_temp,
957 &cm_core->connected_nodes) {
958 cm_node = container_of(list_node, struct nes_cm_node, list);
959 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
960 add_ref_cm_node(cm_node);
961 list_add(&cm_node->timer_entry, &timer_list);
964 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
966 list_for_each_safe(list_node, list_core_temp, &timer_list) {
967 cm_node = container_of(list_node, struct nes_cm_node,
969 recv_entry = cm_node->recv_entry;
972 if (time_after(recv_entry->timetosend, jiffies)) {
973 if (nexttimeout > recv_entry->timetosend ||
975 nexttimeout = recv_entry->timetosend;
979 handle_recv_entry(cm_node, 1);
983 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
985 send_entry = cm_node->send_entry;
988 if (time_after(send_entry->timetosend, jiffies)) {
989 if (cm_node->state != NES_CM_STATE_TSA) {
991 send_entry->timetosend) ||
994 send_entry->timetosend;
998 free_retrans_entry(cm_node);
1003 if ((cm_node->state == NES_CM_STATE_TSA) ||
1004 (cm_node->state == NES_CM_STATE_CLOSED)) {
1005 free_retrans_entry(cm_node);
1009 if (!send_entry->retranscount ||
1010 !send_entry->retrycount) {
1011 cm_packets_dropped++;
1012 free_retrans_entry(cm_node);
1014 spin_unlock_irqrestore(
1015 &cm_node->retrans_list_lock, flags);
1016 nes_retrans_expired(cm_node);
1017 cm_node->state = NES_CM_STATE_CLOSED;
1018 spin_lock_irqsave(&cm_node->retrans_list_lock,
1022 atomic_inc(&send_entry->skb->users);
1023 cm_packets_retrans++;
1024 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
1025 "for node %p, jiffies = %lu, time to send = "
1026 "%lu, retranscount = %u, send_entry->seq_num = "
1027 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
1028 "0x%08X\n", send_entry, cm_node, jiffies,
1029 send_entry->timetosend,
1030 send_entry->retranscount,
1031 send_entry->seq_num,
1032 cm_node->tcp_cntxt.rem_ack_num);
1034 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
1036 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
1037 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1038 if (ret != NETDEV_TX_OK) {
1039 nes_debug(NES_DBG_CM, "rexmit failed for "
1040 "node=%p\n", cm_node);
1041 cm_packets_bounced++;
1042 send_entry->retrycount--;
1043 nexttimeout = jiffies + NES_SHORT_TIME;
1049 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
1050 "%u, retry count = %u.\n",
1051 send_entry->retranscount,
1052 send_entry->retrycount);
1053 if (send_entry->send_retrans) {
1054 send_entry->retranscount--;
1055 timetosend = (NES_RETRY_TIMEOUT <<
1056 (NES_DEFAULT_RETRANS - send_entry->retranscount));
1058 send_entry->timetosend = jiffies +
1059 min(timetosend, NES_MAX_TIMEOUT);
1060 if (nexttimeout > send_entry->timetosend ||
1062 nexttimeout = send_entry->timetosend;
1066 int close_when_complete;
1067 close_when_complete =
1068 send_entry->close_when_complete;
1069 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
1070 cm_node, cm_node->state);
1071 free_retrans_entry(cm_node);
1072 if (close_when_complete)
1073 rem_ref_cm_node(cm_node->cm_core,
1078 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1079 rem_ref_cm_node(cm_node->cm_core, cm_node);
1083 if (!timer_pending(&cm_core->tcp_timer))
1084 mod_timer(&cm_core->tcp_timer, nexttimeout);
1092 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
1093 struct sk_buff *skb)
1096 int flags = SET_SYN;
1097 char optionsbuffer[sizeof(struct option_mss) +
1098 sizeof(struct option_windowscale) + sizeof(struct option_base) +
1099 TCP_OPTIONS_PADDING];
1101 int optionssize = 0;
1102 /* Sending MSS option */
1103 union all_known_options *options;
1108 options = (union all_known_options *)&optionsbuffer[optionssize];
1109 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1110 options->as_mss.length = sizeof(struct option_mss);
1111 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1112 optionssize += sizeof(struct option_mss);
1114 options = (union all_known_options *)&optionsbuffer[optionssize];
1115 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1116 options->as_windowscale.length = sizeof(struct option_windowscale);
1117 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1118 optionssize += sizeof(struct option_windowscale);
1120 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
1121 options = (union all_known_options *)&optionsbuffer[optionssize];
1122 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
1123 options->as_base.length = sizeof(struct option_base);
1124 optionssize += sizeof(struct option_base);
1125 /* we need the size to be a multiple of 4 */
1126 options = (union all_known_options *)&optionsbuffer[optionssize];
1127 options->as_end = 1;
1129 options = (union all_known_options *)&optionsbuffer[optionssize];
1130 options->as_end = 1;
1134 options = (union all_known_options *)&optionsbuffer[optionssize];
1135 options->as_end = OPTION_NUMBER_END;
1139 skb = dev_alloc_skb(MAX_CM_BUFFER);
1141 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1148 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1149 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1158 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1161 int flags = SET_RST | SET_ACK;
1164 skb = dev_alloc_skb(MAX_CM_BUFFER);
1166 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1170 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1171 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1180 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1185 skb = dev_alloc_skb(MAX_CM_BUFFER);
1188 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1192 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1193 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1202 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1206 /* if we didn't get a frame get one */
1208 skb = dev_alloc_skb(MAX_CM_BUFFER);
1211 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1215 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1216 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1223 * find_node - find a cm node that matches the reference cm node
1225 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1226 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1228 unsigned long flags;
1229 struct list_head *hte;
1230 struct nes_cm_node *cm_node;
1232 /* get a handle on the hte */
1233 hte = &cm_core->connected_nodes;
1235 /* walk list and find cm_node associated with this session ID */
1236 spin_lock_irqsave(&cm_core->ht_lock, flags);
1237 list_for_each_entry(cm_node, hte, list) {
1238 /* compare quad, return node handle if a match */
1239 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1240 cm_node->loc_addr, cm_node->loc_port,
1242 cm_node->rem_addr, cm_node->rem_port,
1243 rem_addr, rem_port);
1244 if ((cm_node->mapped_loc_addr == loc_addr) &&
1245 (cm_node->mapped_loc_port == loc_port) &&
1246 (cm_node->mapped_rem_addr == rem_addr) &&
1247 (cm_node->mapped_rem_port == rem_port)) {
1249 add_ref_cm_node(cm_node);
1250 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1254 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1262 * find_listener - find a cm node listening on this addr-port pair
1264 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1265 nes_addr_t dst_addr, u16 dst_port,
1266 enum nes_cm_listener_state listener_state, int local)
1268 unsigned long flags;
1269 struct nes_cm_listener *listen_node;
1270 nes_addr_t listen_addr;
1273 /* walk list and find cm_node associated with this session ID */
1274 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1275 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1277 listen_addr = listen_node->loc_addr;
1278 listen_port = listen_node->loc_port;
1280 listen_addr = listen_node->mapped_loc_addr;
1281 listen_port = listen_node->mapped_loc_port;
1283 /* compare node pair, return node handle if a match */
1284 if (((listen_addr == dst_addr) ||
1285 listen_addr == 0x00000000) &&
1286 (listen_port == dst_port) &&
1287 (listener_state & listen_node->listener_state)) {
1288 atomic_inc(&listen_node->ref_count);
1289 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1293 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1300 * add_hte_node - add a cm node to the hash table
1302 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1304 unsigned long flags;
1305 struct list_head *hte;
1307 if (!cm_node || !cm_core)
1310 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1313 spin_lock_irqsave(&cm_core->ht_lock, flags);
1315 /* get a handle on the hash table element (list head for this slot) */
1316 hte = &cm_core->connected_nodes;
1317 list_add_tail(&cm_node->list, hte);
1318 atomic_inc(&cm_core->ht_node_cnt);
1320 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1327 * mini_cm_dec_refcnt_listen
1329 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1330 struct nes_cm_listener *listener, int free_hanging_nodes)
1334 unsigned long flags;
1335 struct list_head *list_pos = NULL;
1336 struct list_head *list_temp = NULL;
1337 struct nes_cm_node *cm_node = NULL;
1338 struct list_head reset_list;
1340 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1341 "refcnt=%d\n", listener, free_hanging_nodes,
1342 atomic_read(&listener->ref_count));
1343 /* free non-accelerated child nodes for this listener */
1344 INIT_LIST_HEAD(&reset_list);
1345 if (free_hanging_nodes) {
1346 spin_lock_irqsave(&cm_core->ht_lock, flags);
1347 list_for_each_safe(list_pos, list_temp,
1348 &g_cm_core->connected_nodes) {
1349 cm_node = container_of(list_pos, struct nes_cm_node,
1351 if ((cm_node->listener == listener) &&
1352 (!cm_node->accelerated)) {
1353 add_ref_cm_node(cm_node);
1354 list_add(&cm_node->reset_entry, &reset_list);
1357 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1360 list_for_each_safe(list_pos, list_temp, &reset_list) {
1361 cm_node = container_of(list_pos, struct nes_cm_node,
1364 struct nes_cm_node *loopback = cm_node->loopbackpartner;
1365 enum nes_cm_node_state old_state;
1366 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1367 rem_ref_cm_node(cm_node->cm_core, cm_node);
1370 cleanup_retrans_entry(cm_node);
1371 err = send_reset(cm_node, NULL);
1374 NES_CM_STATE_CLOSED;
1377 old_state = cm_node->state;
1378 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1379 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1385 struct nes_cm_event event;
1387 event.cm_node = loopback;
1388 event.cm_info.rem_addr =
1390 event.cm_info.loc_addr =
1392 event.cm_info.rem_port =
1394 event.cm_info.loc_port =
1396 event.cm_info.cm_id = loopback->cm_id;
1397 add_ref_cm_node(loopback);
1398 loopback->state = NES_CM_STATE_CLOSED;
1399 cm_event_connect_error(&event);
1400 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1402 rem_ref_cm_node(cm_node->cm_core,
1410 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1411 if (!atomic_dec_return(&listener->ref_count)) {
1412 list_del(&listener->list);
1414 /* decrement our listen node count */
1415 atomic_dec(&cm_core->listen_node_cnt);
1417 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1419 if (listener->nesvnic) {
1420 nes_manage_apbvt(listener->nesvnic,
1421 listener->mapped_loc_port,
1422 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn),
1423 NES_MANAGE_APBVT_DEL);
1425 nes_remove_mapinfo(listener->loc_addr,
1427 listener->mapped_loc_addr,
1428 listener->mapped_loc_port);
1429 nes_debug(NES_DBG_NLMSG,
1430 "Delete APBVT mapped_loc_port = %04X\n",
1431 listener->mapped_loc_port);
1434 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1439 atomic_inc(&cm_listens_destroyed);
1441 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1444 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1445 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1446 " with non-zero pending accepts=%u\n",
1447 listener, atomic_read(&listener->pend_accepts_cnt));
1455 * mini_cm_del_listen
1457 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1458 struct nes_cm_listener *listener)
1460 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1461 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1462 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1467 * mini_cm_accelerated
1469 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1470 struct nes_cm_node *cm_node)
1472 cm_node->accelerated = 1;
1474 if (cm_node->accept_pend) {
1475 BUG_ON(!cm_node->listener);
1476 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1477 cm_node->accept_pend = 0;
1478 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1481 if (!timer_pending(&cm_core->tcp_timer))
1482 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
1489 * nes_addr_resolve_neigh
1491 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1494 struct neighbour *neigh;
1496 struct net_device *netdev;
1497 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1499 rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
1501 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1506 if (netif_is_bond_slave(nesvnic->netdev))
1507 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
1509 netdev = nesvnic->netdev;
1511 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, netdev);
1515 if (neigh->nud_state & NUD_VALID) {
1516 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1517 " is %pM, Gateway is 0x%08X \n", dst_ip,
1518 neigh->ha, ntohl(rt->rt_gateway));
1520 if (arpindex >= 0) {
1521 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
1522 /* Mac address same as in nes_arp_table */
1526 nes_manage_arp_cache(nesvnic->netdev,
1527 nesadapter->arp_table[arpindex].mac_addr,
1528 dst_ip, NES_ARP_DELETE);
1531 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1532 dst_ip, NES_ARP_ADD);
1533 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1536 neigh_event_send(neigh, NULL);
1543 neigh_release(neigh);
1550 * make_cm_node - create a new instance of a cm node
1552 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1553 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1554 struct nes_cm_listener *listener)
1556 struct nes_cm_node *cm_node;
1558 int oldarpindex = 0;
1560 struct nes_device *nesdev;
1561 struct nes_adapter *nesadapter;
1563 /* create an hte and cm_node for this instance */
1564 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1568 /* set our node specific transport info */
1569 cm_node->loc_addr = cm_info->loc_addr;
1570 cm_node->rem_addr = cm_info->rem_addr;
1571 cm_node->loc_port = cm_info->loc_port;
1572 cm_node->rem_port = cm_info->rem_port;
1574 cm_node->mapped_loc_addr = cm_info->mapped_loc_addr;
1575 cm_node->mapped_rem_addr = cm_info->mapped_rem_addr;
1576 cm_node->mapped_loc_port = cm_info->mapped_loc_port;
1577 cm_node->mapped_rem_port = cm_info->mapped_rem_port;
1579 cm_node->mpa_frame_rev = mpa_version;
1580 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1581 cm_node->mpav2_ird_ord = 0;
1582 cm_node->ird_size = 0;
1583 cm_node->ord_size = 0;
1585 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1586 &cm_node->loc_addr, cm_node->loc_port,
1587 &cm_node->rem_addr, cm_node->rem_port);
1588 cm_node->listener = listener;
1589 cm_node->netdev = nesvnic->netdev;
1590 cm_node->cm_id = cm_info->cm_id;
1591 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1593 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1596 spin_lock_init(&cm_node->retrans_list_lock);
1598 cm_node->loopbackpartner = NULL;
1599 atomic_set(&cm_node->ref_count, 1);
1600 /* associate our parent CM core */
1601 cm_node->cm_core = cm_core;
1602 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1603 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1604 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1605 NES_CM_DEFAULT_RCV_WND_SCALE;
1606 ts = current_kernel_time();
1607 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1608 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1609 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1610 cm_node->tcp_cntxt.rcv_nxt = 0;
1611 /* get a unique session ID , add thread_id to an upcounter to handle race */
1612 atomic_inc(&cm_core->node_cnt);
1613 cm_node->conn_type = cm_info->conn_type;
1614 cm_node->apbvt_set = 0;
1615 cm_node->accept_pend = 0;
1617 cm_node->nesvnic = nesvnic;
1618 /* get some device handles, for arp lookup */
1619 nesdev = nesvnic->nesdev;
1620 nesadapter = nesdev->nesadapter;
1622 cm_node->loopbackpartner = NULL;
1624 /* get the mac addr for the remote node */
1625 oldarpindex = nes_arp_table(nesdev, cm_node->mapped_rem_addr,
1626 NULL, NES_ARP_RESOLVE);
1627 arpindex = nes_addr_resolve_neigh(nesvnic,
1628 cm_node->mapped_rem_addr, oldarpindex);
1634 /* copy the mac addr to node context */
1635 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1636 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1639 add_hte_node(cm_core, cm_node);
1640 atomic_inc(&cm_nodes_created);
1647 * add_ref_cm_node - destroy an instance of a cm node
1649 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1651 atomic_inc(&cm_node->ref_count);
1657 * rem_ref_cm_node - destroy an instance of a cm node
1659 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1660 struct nes_cm_node *cm_node)
1662 unsigned long flags;
1663 struct nes_qp *nesqp;
1668 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1669 if (atomic_dec_return(&cm_node->ref_count)) {
1670 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1673 list_del(&cm_node->list);
1674 atomic_dec(&cm_core->ht_node_cnt);
1675 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1677 /* if the node is destroyed before connection was accelerated */
1678 if (!cm_node->accelerated && cm_node->accept_pend) {
1679 BUG_ON(!cm_node->listener);
1680 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1681 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1683 WARN_ON(cm_node->send_entry);
1684 if (cm_node->recv_entry)
1685 handle_recv_entry(cm_node, 0);
1686 if (cm_node->listener) {
1687 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1689 if (cm_node->apbvt_set && cm_node->nesvnic) {
1690 nes_manage_apbvt(cm_node->nesvnic, cm_node->mapped_loc_port,
1691 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1692 NES_MANAGE_APBVT_DEL);
1694 nes_debug(NES_DBG_NLMSG, "Delete APBVT mapped_loc_port = %04X\n",
1695 cm_node->mapped_loc_port);
1696 nes_remove_mapinfo(cm_node->loc_addr, cm_node->loc_port,
1697 cm_node->mapped_loc_addr, cm_node->mapped_loc_port);
1700 atomic_dec(&cm_core->node_cnt);
1701 atomic_inc(&cm_nodes_destroyed);
1702 nesqp = cm_node->nesqp;
1704 nesqp->cm_node = NULL;
1705 nes_rem_ref(&nesqp->ibqp);
1706 cm_node->nesqp = NULL;
1716 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1717 u32 optionsize, u32 syn_packet)
1721 union all_known_options *all_options;
1722 char got_mss_option = 0;
1724 while (offset < optionsize) {
1725 all_options = (union all_known_options *)(optionsloc + offset);
1726 switch (all_options->as_base.optionnum) {
1727 case OPTION_NUMBER_END:
1728 offset = optionsize;
1730 case OPTION_NUMBER_NONE:
1733 case OPTION_NUMBER_MSS:
1734 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1735 "Size: %d\n", __func__,
1736 all_options->as_mss.length, offset, optionsize);
1738 if (all_options->as_mss.length != 4) {
1741 tmp = ntohs(all_options->as_mss.mss);
1742 if (tmp > 0 && tmp <
1743 cm_node->tcp_cntxt.mss)
1744 cm_node->tcp_cntxt.mss = tmp;
1747 case OPTION_NUMBER_WINDOW_SCALE:
1748 cm_node->tcp_cntxt.snd_wscale =
1749 all_options->as_windowscale.shiftcount;
1752 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1753 all_options->as_base.optionnum);
1756 offset += all_options->as_base.length;
1758 if ((!got_mss_option) && (syn_packet))
1759 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1763 static void drop_packet(struct sk_buff *skb)
1765 atomic_inc(&cm_accel_dropped_pkts);
1766 dev_kfree_skb_any(skb);
1769 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1771 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1772 "refcnt=%d\n", cm_node, cm_node->state,
1773 atomic_read(&cm_node->ref_count));
1774 switch (cm_node->state) {
1775 case NES_CM_STATE_SYN_RCVD:
1776 case NES_CM_STATE_SYN_SENT:
1777 case NES_CM_STATE_ESTABLISHED:
1778 case NES_CM_STATE_MPAREJ_RCVD:
1779 cm_node->tcp_cntxt.rcv_nxt++;
1780 cleanup_retrans_entry(cm_node);
1781 cm_node->state = NES_CM_STATE_LAST_ACK;
1782 send_fin(cm_node, NULL);
1784 case NES_CM_STATE_MPAREQ_SENT:
1785 create_event(cm_node, NES_CM_EVENT_ABORTED);
1786 cm_node->tcp_cntxt.rcv_nxt++;
1787 cleanup_retrans_entry(cm_node);
1788 cm_node->state = NES_CM_STATE_CLOSED;
1789 add_ref_cm_node(cm_node);
1790 send_reset(cm_node, NULL);
1792 case NES_CM_STATE_FIN_WAIT1:
1793 cm_node->tcp_cntxt.rcv_nxt++;
1794 cleanup_retrans_entry(cm_node);
1795 cm_node->state = NES_CM_STATE_CLOSING;
1796 send_ack(cm_node, NULL);
1797 /* Wait for ACK as this is simultaneous close..
1798 * After we receive ACK, do not send anything..
1799 * Just rm the node.. Done.. */
1801 case NES_CM_STATE_FIN_WAIT2:
1802 cm_node->tcp_cntxt.rcv_nxt++;
1803 cleanup_retrans_entry(cm_node);
1804 cm_node->state = NES_CM_STATE_TIME_WAIT;
1805 send_ack(cm_node, NULL);
1806 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1808 case NES_CM_STATE_TIME_WAIT:
1809 cm_node->tcp_cntxt.rcv_nxt++;
1810 cleanup_retrans_entry(cm_node);
1811 cm_node->state = NES_CM_STATE_CLOSED;
1812 rem_ref_cm_node(cm_node->cm_core, cm_node);
1814 case NES_CM_STATE_TSA:
1816 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1817 cm_node, cm_node->state);
1823 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1824 struct tcphdr *tcph)
1827 int reset = 0; /* whether to send reset in case of err.. */
1828 atomic_inc(&cm_resets_recvd);
1829 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1830 " refcnt=%d\n", cm_node, cm_node->state,
1831 atomic_read(&cm_node->ref_count));
1832 cleanup_retrans_entry(cm_node);
1833 switch (cm_node->state) {
1834 case NES_CM_STATE_SYN_SENT:
1835 case NES_CM_STATE_MPAREQ_SENT:
1836 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1837 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1838 cm_node->listener, cm_node->state);
1839 switch (cm_node->mpa_frame_rev) {
1841 cm_node->mpa_frame_rev = IETF_MPA_V1;
1842 /* send a syn and goto syn sent state */
1843 cm_node->state = NES_CM_STATE_SYN_SENT;
1844 if (send_syn(cm_node, 0, NULL)) {
1845 active_open_err(cm_node, skb, reset);
1850 active_open_err(cm_node, skb, reset);
1854 case NES_CM_STATE_MPAREQ_RCVD:
1855 atomic_inc(&cm_node->passive_state);
1856 dev_kfree_skb_any(skb);
1858 case NES_CM_STATE_ESTABLISHED:
1859 case NES_CM_STATE_SYN_RCVD:
1860 case NES_CM_STATE_LISTENING:
1861 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1862 passive_open_err(cm_node, skb, reset);
1864 case NES_CM_STATE_TSA:
1865 active_open_err(cm_node, skb, reset);
1867 case NES_CM_STATE_CLOSED:
1870 case NES_CM_STATE_FIN_WAIT2:
1871 case NES_CM_STATE_FIN_WAIT1:
1872 case NES_CM_STATE_LAST_ACK:
1873 cm_node->cm_id->rem_ref(cm_node->cm_id);
1874 case NES_CM_STATE_TIME_WAIT:
1875 cm_node->state = NES_CM_STATE_CLOSED;
1876 rem_ref_cm_node(cm_node->cm_core, cm_node);
1886 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1889 int datasize = skb->len;
1890 u8 *dataloc = skb->data;
1892 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1895 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1897 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1898 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1899 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1900 "cm_node=%p listener=%p state=%d\n", __func__,
1901 __LINE__, cm_node, cm_node->listener,
1903 active_open_err(cm_node, skb, 1);
1905 passive_open_err(cm_node, skb, 1);
1910 switch (cm_node->state) {
1911 case NES_CM_STATE_ESTABLISHED:
1912 if (res_type == NES_MPA_REQUEST_REJECT)
1913 /*BIG problem as we are receiving the MPA.. So should
1914 * not be REJECT.. This is Passive Open.. We can
1915 * only receive it Reject for Active Open...*/
1917 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1918 type = NES_CM_EVENT_MPA_REQ;
1919 atomic_set(&cm_node->passive_state,
1920 NES_PASSIVE_STATE_INDICATED);
1922 case NES_CM_STATE_MPAREQ_SENT:
1923 cleanup_retrans_entry(cm_node);
1924 if (res_type == NES_MPA_REQUEST_REJECT) {
1925 type = NES_CM_EVENT_MPA_REJECT;
1926 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1928 type = NES_CM_EVENT_CONNECTED;
1929 cm_node->state = NES_CM_STATE_TSA;
1937 dev_kfree_skb_any(skb);
1938 create_event(cm_node, type);
1941 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1943 switch (cm_node->state) {
1944 case NES_CM_STATE_SYN_SENT:
1945 case NES_CM_STATE_MPAREQ_SENT:
1946 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1947 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1948 cm_node->listener, cm_node->state);
1949 active_open_err(cm_node, skb, 1);
1951 case NES_CM_STATE_ESTABLISHED:
1952 case NES_CM_STATE_SYN_RCVD:
1953 passive_open_err(cm_node, skb, 1);
1955 case NES_CM_STATE_TSA:
1961 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1962 struct sk_buff *skb)
1966 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1968 active_open_err(cm_node, skb, 1);
1973 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1974 struct sk_buff *skb)
1979 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1980 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1983 seq = ntohl(tcph->seq);
1984 ack_seq = ntohl(tcph->ack_seq);
1985 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1986 if (ack_seq != loc_seq_num)
1988 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
1991 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1992 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1993 cm_node->listener, cm_node->state);
1994 indicate_pkt_err(cm_node, skb);
1995 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1996 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
2003 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
2004 * is created with a listener or it may comein as rexmitted packet which in
2005 * that case will be just dropped.
2007 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2008 struct tcphdr *tcph)
2014 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2016 inc_sequence = ntohl(tcph->seq);
2018 switch (cm_node->state) {
2019 case NES_CM_STATE_SYN_SENT:
2020 case NES_CM_STATE_MPAREQ_SENT:
2021 /* Rcvd syn on active open connection*/
2022 active_open_err(cm_node, skb, 1);
2024 case NES_CM_STATE_LISTENING:
2026 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2027 cm_node->listener->backlog) {
2028 nes_debug(NES_DBG_CM, "drop syn due to backlog "
2031 passive_open_err(cm_node, skb, 0);
2034 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
2037 passive_open_err(cm_node, skb, 0);
2041 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2042 BUG_ON(cm_node->send_entry);
2043 cm_node->accept_pend = 1;
2044 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2046 cm_node->state = NES_CM_STATE_SYN_RCVD;
2047 send_syn(cm_node, 1, skb);
2049 case NES_CM_STATE_CLOSED:
2050 cleanup_retrans_entry(cm_node);
2051 add_ref_cm_node(cm_node);
2052 send_reset(cm_node, skb);
2054 case NES_CM_STATE_TSA:
2055 case NES_CM_STATE_ESTABLISHED:
2056 case NES_CM_STATE_FIN_WAIT1:
2057 case NES_CM_STATE_FIN_WAIT2:
2058 case NES_CM_STATE_MPAREQ_RCVD:
2059 case NES_CM_STATE_LAST_ACK:
2060 case NES_CM_STATE_CLOSING:
2061 case NES_CM_STATE_UNKNOWN:
2068 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2069 struct tcphdr *tcph)
2075 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2077 inc_sequence = ntohl(tcph->seq);
2078 switch (cm_node->state) {
2079 case NES_CM_STATE_SYN_SENT:
2080 cleanup_retrans_entry(cm_node);
2082 if (check_syn(cm_node, tcph, skb))
2084 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2086 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
2088 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
2092 cleanup_retrans_entry(cm_node);
2093 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2094 send_mpa_request(cm_node, skb);
2095 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
2097 case NES_CM_STATE_MPAREQ_RCVD:
2098 /* passive open, so should not be here */
2099 passive_open_err(cm_node, skb, 1);
2101 case NES_CM_STATE_LISTENING:
2102 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2103 cleanup_retrans_entry(cm_node);
2104 cm_node->state = NES_CM_STATE_CLOSED;
2105 send_reset(cm_node, skb);
2107 case NES_CM_STATE_CLOSED:
2108 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2109 cleanup_retrans_entry(cm_node);
2110 add_ref_cm_node(cm_node);
2111 send_reset(cm_node, skb);
2113 case NES_CM_STATE_ESTABLISHED:
2114 case NES_CM_STATE_FIN_WAIT1:
2115 case NES_CM_STATE_FIN_WAIT2:
2116 case NES_CM_STATE_LAST_ACK:
2117 case NES_CM_STATE_TSA:
2118 case NES_CM_STATE_CLOSING:
2119 case NES_CM_STATE_UNKNOWN:
2120 case NES_CM_STATE_MPAREQ_SENT:
2127 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2128 struct tcphdr *tcph)
2135 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2137 if (check_seq(cm_node, tcph, skb))
2140 skb_pull(skb, tcph->doff << 2);
2141 inc_sequence = ntohl(tcph->seq);
2142 datasize = skb->len;
2143 switch (cm_node->state) {
2144 case NES_CM_STATE_SYN_RCVD:
2146 cleanup_retrans_entry(cm_node);
2147 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2150 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2151 cm_node->state = NES_CM_STATE_ESTABLISHED;
2153 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2154 handle_rcv_mpa(cm_node, skb);
2155 } else { /* rcvd ACK only */
2156 dev_kfree_skb_any(skb);
2159 case NES_CM_STATE_ESTABLISHED:
2161 cleanup_retrans_entry(cm_node);
2163 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2164 handle_rcv_mpa(cm_node, skb);
2169 case NES_CM_STATE_MPAREQ_SENT:
2170 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2172 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2173 handle_rcv_mpa(cm_node, skb);
2174 } else { /* Could be just an ack pkt.. */
2175 dev_kfree_skb_any(skb);
2178 case NES_CM_STATE_LISTENING:
2179 cleanup_retrans_entry(cm_node);
2180 cm_node->state = NES_CM_STATE_CLOSED;
2181 send_reset(cm_node, skb);
2183 case NES_CM_STATE_CLOSED:
2184 cleanup_retrans_entry(cm_node);
2185 add_ref_cm_node(cm_node);
2186 send_reset(cm_node, skb);
2188 case NES_CM_STATE_LAST_ACK:
2189 case NES_CM_STATE_CLOSING:
2190 cleanup_retrans_entry(cm_node);
2191 cm_node->state = NES_CM_STATE_CLOSED;
2192 cm_node->cm_id->rem_ref(cm_node->cm_id);
2193 rem_ref_cm_node(cm_node->cm_core, cm_node);
2196 case NES_CM_STATE_FIN_WAIT1:
2197 cleanup_retrans_entry(cm_node);
2199 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2201 case NES_CM_STATE_SYN_SENT:
2202 case NES_CM_STATE_FIN_WAIT2:
2203 case NES_CM_STATE_TSA:
2204 case NES_CM_STATE_MPAREQ_RCVD:
2205 case NES_CM_STATE_UNKNOWN:
2207 cleanup_retrans_entry(cm_node);
2216 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2217 struct sk_buff *skb, int optionsize, int passive)
2219 u8 *optionsloc = (u8 *)&tcph[1];
2222 if (process_options(cm_node, optionsloc, optionsize,
2224 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2227 passive_open_err(cm_node, skb, 1);
2229 active_open_err(cm_node, skb, 1);
2234 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2235 cm_node->tcp_cntxt.snd_wscale;
2237 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2238 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2243 * active_open_err() will send reset() if flag set..
2244 * It will also send ABORT event.
2246 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2249 cleanup_retrans_entry(cm_node);
2251 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2252 "state=%d\n", cm_node, cm_node->state);
2253 add_ref_cm_node(cm_node);
2254 send_reset(cm_node, skb);
2256 dev_kfree_skb_any(skb);
2259 cm_node->state = NES_CM_STATE_CLOSED;
2260 create_event(cm_node, NES_CM_EVENT_ABORTED);
2264 * passive_open_err() will either do a reset() or will free up the skb and
2265 * remove the cm_node.
2267 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2270 cleanup_retrans_entry(cm_node);
2271 cm_node->state = NES_CM_STATE_CLOSED;
2273 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2274 "cm_node=%p state =%d\n", cm_node, cm_node->state);
2275 send_reset(cm_node, skb);
2277 dev_kfree_skb_any(skb);
2278 rem_ref_cm_node(cm_node->cm_core, cm_node);
2283 * free_retrans_entry() routines assumes that the retrans_list_lock has
2284 * been acquired before calling.
2286 static void free_retrans_entry(struct nes_cm_node *cm_node)
2288 struct nes_timer_entry *send_entry;
2290 send_entry = cm_node->send_entry;
2292 cm_node->send_entry = NULL;
2293 dev_kfree_skb_any(send_entry->skb);
2295 rem_ref_cm_node(cm_node->cm_core, cm_node);
2299 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2301 unsigned long flags;
2303 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2304 free_retrans_entry(cm_node);
2305 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2310 * Returns skb if to be freed, else it will return NULL if already used..
2312 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2313 struct nes_cm_core *cm_core)
2315 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2316 struct tcphdr *tcph = tcp_hdr(skb);
2320 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2322 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2323 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2324 tcph->ack, tcph->rst, tcph->fin);
2327 pkt_type = NES_PKT_TYPE_RST;
2328 } else if (tcph->syn) {
2329 pkt_type = NES_PKT_TYPE_SYN;
2331 pkt_type = NES_PKT_TYPE_SYNACK;
2332 } else if (tcph->ack) {
2333 pkt_type = NES_PKT_TYPE_ACK;
2339 case NES_PKT_TYPE_SYN:
2340 handle_syn_pkt(cm_node, skb, tcph);
2342 case NES_PKT_TYPE_SYNACK:
2343 handle_synack_pkt(cm_node, skb, tcph);
2345 case NES_PKT_TYPE_ACK:
2346 ret = handle_ack_pkt(cm_node, skb, tcph);
2347 if (fin_set && !ret)
2348 handle_fin_pkt(cm_node);
2350 case NES_PKT_TYPE_RST:
2351 handle_rst_pkt(cm_node, skb, tcph);
2354 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2355 handle_fin_pkt(cm_node);
2362 * mini_cm_listen - create a listen node with params
2364 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2365 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2367 struct nes_cm_listener *listener;
2368 struct iwpm_dev_data pm_reg_msg;
2369 struct iwpm_sa_data pm_msg;
2370 unsigned long flags;
2373 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2374 cm_info->loc_addr, cm_info->loc_port);
2376 /* cannot have multiple matching listeners */
2377 listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2378 NES_CM_LISTENER_EITHER_STATE, 1);
2380 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2381 /* find automatically incs ref count ??? */
2382 atomic_dec(&listener->ref_count);
2383 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2388 nes_form_reg_msg(nesvnic, &pm_reg_msg);
2389 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
2391 nes_debug(NES_DBG_NLMSG,
2392 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
2394 if (iwpm_valid_pid() && !iwpm_err) {
2395 nes_form_pm_msg(cm_info, &pm_msg);
2396 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_NES);
2398 nes_debug(NES_DBG_NLMSG,
2399 "Port Mapper query fail (err = %d).\n", iwpm_err);
2401 nes_record_pm_msg(cm_info, &pm_msg);
2404 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2405 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2407 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2411 listener->loc_addr = cm_info->loc_addr;
2412 listener->loc_port = cm_info->loc_port;
2413 listener->mapped_loc_addr = cm_info->mapped_loc_addr;
2414 listener->mapped_loc_port = cm_info->mapped_loc_port;
2415 listener->reused_node = 0;
2417 atomic_set(&listener->ref_count, 1);
2420 /* find already inc'ed the ref count */
2422 listener->reused_node = 1;
2425 listener->cm_id = cm_info->cm_id;
2426 atomic_set(&listener->pend_accepts_cnt, 0);
2427 listener->cm_core = cm_core;
2428 listener->nesvnic = nesvnic;
2429 atomic_inc(&cm_core->node_cnt);
2431 listener->conn_type = cm_info->conn_type;
2432 listener->backlog = cm_info->backlog;
2433 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2435 if (!listener->reused_node) {
2436 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2437 list_add(&listener->list, &cm_core->listen_list.list);
2438 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2439 atomic_inc(&cm_core->listen_node_cnt);
2442 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2443 " listener = %p, backlog = %d, cm_id = %p.\n",
2444 cm_info->loc_addr, cm_info->loc_port,
2445 listener, listener->backlog, listener->cm_id);
2452 * mini_cm_connect - make a connection node with params
2454 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2455 struct nes_vnic *nesvnic, u16 private_data_len,
2456 void *private_data, struct nes_cm_info *cm_info)
2459 struct nes_cm_node *cm_node;
2460 struct nes_cm_listener *loopbackremotelistener;
2461 struct nes_cm_node *loopbackremotenode;
2462 struct nes_cm_info loopback_cm_info;
2465 /* create a CM connection node */
2466 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2470 /* set our node side to client (active) side */
2471 cm_node->tcp_cntxt.client = 1;
2472 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2474 if (cm_info->loc_addr == cm_info->rem_addr) {
2475 loopbackremotelistener = find_listener(cm_core,
2476 cm_node->mapped_loc_addr, cm_node->mapped_rem_port,
2477 NES_CM_LISTENER_ACTIVE_STATE, 0);
2478 if (loopbackremotelistener == NULL) {
2479 create_event(cm_node, NES_CM_EVENT_ABORTED);
2481 loopback_cm_info = *cm_info;
2482 loopback_cm_info.loc_port = cm_info->rem_port;
2483 loopback_cm_info.rem_port = cm_info->loc_port;
2484 loopback_cm_info.mapped_loc_port =
2485 cm_info->mapped_rem_port;
2486 loopback_cm_info.mapped_rem_port =
2487 cm_info->mapped_loc_port;
2488 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2489 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2490 &loopback_cm_info, loopbackremotelistener);
2491 if (!loopbackremotenode) {
2492 rem_ref_cm_node(cm_node->cm_core, cm_node);
2495 atomic_inc(&cm_loopbacks);
2496 loopbackremotenode->loopbackpartner = cm_node;
2497 loopbackremotenode->tcp_cntxt.rcv_wscale =
2498 NES_CM_DEFAULT_RCV_WND_SCALE;
2499 cm_node->loopbackpartner = loopbackremotenode;
2500 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2502 loopbackremotenode->mpa_frame_size = private_data_len;
2504 /* we are done handling this state. */
2505 /* set node to a TSA state */
2506 cm_node->state = NES_CM_STATE_TSA;
2507 cm_node->tcp_cntxt.rcv_nxt =
2508 loopbackremotenode->tcp_cntxt.loc_seq_num;
2509 loopbackremotenode->tcp_cntxt.rcv_nxt =
2510 cm_node->tcp_cntxt.loc_seq_num;
2511 cm_node->tcp_cntxt.max_snd_wnd =
2512 loopbackremotenode->tcp_cntxt.rcv_wnd;
2513 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2514 cm_node->tcp_cntxt.rcv_wnd;
2515 cm_node->tcp_cntxt.snd_wnd =
2516 loopbackremotenode->tcp_cntxt.rcv_wnd;
2517 loopbackremotenode->tcp_cntxt.snd_wnd =
2518 cm_node->tcp_cntxt.rcv_wnd;
2519 cm_node->tcp_cntxt.snd_wscale =
2520 loopbackremotenode->tcp_cntxt.rcv_wscale;
2521 loopbackremotenode->tcp_cntxt.snd_wscale =
2522 cm_node->tcp_cntxt.rcv_wscale;
2523 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2524 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2529 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2530 cm_node->mpa_frame_size = private_data_len;
2532 memcpy(start_buff, private_data, private_data_len);
2534 /* send a syn and goto syn sent state */
2535 cm_node->state = NES_CM_STATE_SYN_SENT;
2536 ret = send_syn(cm_node, 0, NULL);
2539 /* error in sending the syn free up the cm_node struct */
2540 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2541 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2542 cm_node->rem_addr, cm_node->rem_port, cm_node,
2544 rem_ref_cm_node(cm_node->cm_core, cm_node);
2549 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2550 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2551 cm_node->rem_addr, cm_node->rem_port, cm_node,
2560 * mini_cm_accept - accept a connection
2561 * This function is never called
2563 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2570 * mini_cm_reject - reject and teardown a connection
2572 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2577 struct nes_cm_event event;
2578 struct iw_cm_id *cm_id = cm_node->cm_id;
2579 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2581 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2582 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2584 if (cm_node->tcp_cntxt.client)
2586 cleanup_retrans_entry(cm_node);
2589 passive_state = atomic_add_return(1, &cm_node->passive_state);
2590 if (passive_state == NES_SEND_RESET_EVENT) {
2591 cm_node->state = NES_CM_STATE_CLOSED;
2592 rem_ref_cm_node(cm_core, cm_node);
2594 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2595 rem_ref_cm_node(cm_core, cm_node);
2597 ret = send_mpa_reject(cm_node);
2599 cm_node->state = NES_CM_STATE_CLOSED;
2600 err = send_reset(cm_node, NULL);
2604 cm_id->add_ref(cm_id);
2609 cm_node->cm_id = NULL;
2610 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2611 rem_ref_cm_node(cm_core, cm_node);
2612 rem_ref_cm_node(cm_core, loopback);
2614 event.cm_node = loopback;
2615 event.cm_info.rem_addr = loopback->rem_addr;
2616 event.cm_info.loc_addr = loopback->loc_addr;
2617 event.cm_info.rem_port = loopback->rem_port;
2618 event.cm_info.loc_port = loopback->loc_port;
2619 event.cm_info.cm_id = loopback->cm_id;
2620 cm_event_mpa_reject(&event);
2621 rem_ref_cm_node(cm_core, cm_node);
2622 loopback->state = NES_CM_STATE_CLOSING;
2624 cm_id = loopback->cm_id;
2625 rem_ref_cm_node(cm_core, loopback);
2626 cm_id->rem_ref(cm_id);
2637 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2641 if (!cm_core || !cm_node)
2644 switch (cm_node->state) {
2645 case NES_CM_STATE_SYN_RCVD:
2646 case NES_CM_STATE_SYN_SENT:
2647 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2648 case NES_CM_STATE_ESTABLISHED:
2649 case NES_CM_STATE_ACCEPTING:
2650 case NES_CM_STATE_MPAREQ_SENT:
2651 case NES_CM_STATE_MPAREQ_RCVD:
2652 cleanup_retrans_entry(cm_node);
2653 send_reset(cm_node, NULL);
2655 case NES_CM_STATE_CLOSE_WAIT:
2656 cm_node->state = NES_CM_STATE_LAST_ACK;
2657 send_fin(cm_node, NULL);
2659 case NES_CM_STATE_FIN_WAIT1:
2660 case NES_CM_STATE_FIN_WAIT2:
2661 case NES_CM_STATE_LAST_ACK:
2662 case NES_CM_STATE_TIME_WAIT:
2663 case NES_CM_STATE_CLOSING:
2666 case NES_CM_STATE_LISTENING:
2667 cleanup_retrans_entry(cm_node);
2668 send_reset(cm_node, NULL);
2670 case NES_CM_STATE_MPAREJ_RCVD:
2671 case NES_CM_STATE_UNKNOWN:
2672 case NES_CM_STATE_INITED:
2673 case NES_CM_STATE_CLOSED:
2674 case NES_CM_STATE_LISTENER_DESTROYED:
2675 ret = rem_ref_cm_node(cm_core, cm_node);
2677 case NES_CM_STATE_TSA:
2678 if (cm_node->send_entry)
2679 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2680 "send_entry=%p\n", cm_node->send_entry);
2681 ret = rem_ref_cm_node(cm_core, cm_node);
2689 * recv_pkt - recv an ETHERNET packet, and process it through CM
2690 * node state machine
2692 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2693 struct nes_vnic *nesvnic, struct sk_buff *skb)
2695 struct nes_cm_node *cm_node = NULL;
2696 struct nes_cm_listener *listener = NULL;
2698 struct tcphdr *tcph;
2699 struct nes_cm_info nfo;
2700 int skb_handled = 1;
2701 __be32 tmp_daddr, tmp_saddr;
2705 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2708 iph = (struct iphdr *)skb->data;
2709 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2711 nfo.loc_addr = ntohl(iph->daddr);
2712 nfo.loc_port = ntohs(tcph->dest);
2713 nfo.rem_addr = ntohl(iph->saddr);
2714 nfo.rem_port = ntohs(tcph->source);
2716 /* If port mapper is available these should be mapped address info */
2717 nfo.mapped_loc_addr = ntohl(iph->daddr);
2718 nfo.mapped_loc_port = ntohs(tcph->dest);
2719 nfo.mapped_rem_addr = ntohl(iph->saddr);
2720 nfo.mapped_rem_port = ntohs(tcph->source);
2722 tmp_daddr = cpu_to_be32(iph->daddr);
2723 tmp_saddr = cpu_to_be32(iph->saddr);
2725 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2726 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2729 cm_node = find_node(cm_core,
2730 nfo.mapped_rem_port, nfo.mapped_rem_addr,
2731 nfo.mapped_loc_port, nfo.mapped_loc_addr);
2734 /* Only type of packet accepted are for */
2735 /* the PASSIVE open (syn only) */
2736 if ((!tcph->syn) || (tcph->ack)) {
2740 listener = find_listener(cm_core, nfo.mapped_loc_addr,
2741 nfo.mapped_loc_port,
2742 NES_CM_LISTENER_ACTIVE_STATE, 0);
2746 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2750 nfo.cm_id = listener->cm_id;
2751 nfo.conn_type = listener->conn_type;
2752 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2755 nes_debug(NES_DBG_CM, "Unable to allocate "
2757 cm_packets_dropped++;
2758 atomic_dec(&listener->ref_count);
2759 dev_kfree_skb_any(skb);
2762 if (!tcph->rst && !tcph->fin) {
2763 cm_node->state = NES_CM_STATE_LISTENING;
2765 cm_packets_dropped++;
2766 rem_ref_cm_node(cm_core, cm_node);
2767 dev_kfree_skb_any(skb);
2770 add_ref_cm_node(cm_node);
2771 } else if (cm_node->state == NES_CM_STATE_TSA) {
2772 if (cm_node->nesqp->pau_mode)
2773 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2775 rem_ref_cm_node(cm_core, cm_node);
2776 atomic_inc(&cm_accel_dropped_pkts);
2777 dev_kfree_skb_any(skb);
2781 skb_reset_network_header(skb);
2782 skb_set_transport_header(skb, sizeof(*tcph));
2783 skb->len = ntohs(iph->tot_len);
2784 process_packet(cm_node, skb, cm_core);
2785 rem_ref_cm_node(cm_core, cm_node);
2792 * nes_cm_alloc_core - allocate a top level instance of a cm core
2794 static struct nes_cm_core *nes_cm_alloc_core(void)
2796 struct nes_cm_core *cm_core;
2798 /* setup the CM core */
2799 /* alloc top level core control structure */
2800 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2804 INIT_LIST_HEAD(&cm_core->connected_nodes);
2805 init_timer(&cm_core->tcp_timer);
2806 cm_core->tcp_timer.function = nes_cm_timer_tick;
2808 cm_core->mtu = NES_CM_DEFAULT_MTU;
2809 cm_core->state = NES_CM_STATE_INITED;
2810 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2812 atomic_set(&cm_core->events_posted, 0);
2814 cm_core->api = &nes_cm_api;
2816 spin_lock_init(&cm_core->ht_lock);
2817 spin_lock_init(&cm_core->listen_list_lock);
2819 INIT_LIST_HEAD(&cm_core->listen_list.list);
2821 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2823 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2824 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2825 cm_core->post_event = nes_cm_post_event;
2826 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2827 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2829 print_core(cm_core);
2835 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2837 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2839 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2846 if (timer_pending(&cm_core->tcp_timer))
2847 del_timer(&cm_core->tcp_timer);
2849 destroy_workqueue(cm_core->event_wq);
2850 destroy_workqueue(cm_core->disconn_wq);
2851 nes_debug(NES_DBG_CM, "\n");
2861 static int mini_cm_get(struct nes_cm_core *cm_core)
2863 return cm_core->state;
2870 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2875 case NES_CM_SET_PKT_SIZE:
2876 cm_core->mtu = value;
2878 case NES_CM_SET_FREE_PKT_Q_SIZE:
2879 cm_core->free_tx_pkt_max = value;
2882 /* unknown set option */
2891 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2892 * successfully exchanged when this is called
2894 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2901 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2902 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2903 NES_QPCONTEXT_MISC_DROS);
2905 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2906 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2908 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2910 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2912 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2913 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2915 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2916 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2917 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2919 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2920 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2921 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2923 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2924 nesqp->nesqp_context->ts_recent = 0;
2925 nesqp->nesqp_context->ts_age = 0;
2926 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2927 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2928 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2929 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2930 cm_node->tcp_cntxt.rcv_wscale);
2931 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2932 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2933 nesqp->nesqp_context->srtt = 0;
2934 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2935 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2936 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2937 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2938 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2939 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2941 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2942 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2943 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2944 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2945 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2946 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2947 le32_to_cpu(nesqp->nesqp_context->misc));
2948 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2949 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2950 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2952 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2953 cm_node->state = NES_CM_STATE_TSA;
2962 int nes_cm_disconn(struct nes_qp *nesqp)
2964 struct disconn_work *work;
2966 work = kzalloc(sizeof *work, GFP_ATOMIC);
2968 return -ENOMEM; /* Timer will clean up */
2970 nes_add_ref(&nesqp->ibqp);
2971 work->nesqp = nesqp;
2972 INIT_WORK(&work->work, nes_disconnect_worker);
2973 queue_work(g_cm_core->disconn_wq, &work->work);
2979 * nes_disconnect_worker
2981 static void nes_disconnect_worker(struct work_struct *work)
2983 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2984 struct nes_qp *nesqp = dwork->nesqp;
2987 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2988 nesqp->last_aeq, nesqp->hwqp.qp_id);
2989 nes_cm_disconn_true(nesqp);
2990 nes_rem_ref(&nesqp->ibqp);
2995 * nes_cm_disconn_true
2997 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2999 unsigned long flags;
3001 struct iw_cm_id *cm_id;
3002 struct iw_cm_event cm_event;
3003 struct nes_vnic *nesvnic;
3005 u8 original_hw_tcp_state;
3006 u8 original_ibqp_state;
3007 int disconn_status = 0;
3008 int issue_disconn = 0;
3009 int issue_close = 0;
3010 int issue_flush = 0;
3011 u32 flush_q = NES_CQP_FLUSH_RQ;
3012 struct ib_event ibevent;
3015 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
3019 spin_lock_irqsave(&nesqp->lock, flags);
3020 cm_id = nesqp->cm_id;
3021 /* make sure we havent already closed this connection */
3023 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
3025 spin_unlock_irqrestore(&nesqp->lock, flags);
3029 nesvnic = to_nesvnic(nesqp->ibqp.device);
3030 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
3032 original_hw_tcp_state = nesqp->hw_tcp_state;
3033 original_ibqp_state = nesqp->ibqp_state;
3034 last_ae = nesqp->last_aeq;
3036 if (nesqp->term_flags) {
3039 nesqp->cm_id = NULL;
3040 del_timer(&nesqp->terminate_timer);
3041 if (nesqp->flush_issued == 0) {
3042 nesqp->flush_issued = 1;
3045 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
3046 ((original_ibqp_state == IB_QPS_RTS) &&
3047 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3049 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
3050 disconn_status = -ECONNRESET;
3053 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
3054 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
3055 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
3056 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3058 nesqp->cm_id = NULL;
3059 if (nesqp->flush_issued == 0) {
3060 nesqp->flush_issued = 1;
3065 spin_unlock_irqrestore(&nesqp->lock, flags);
3067 if ((issue_flush) && (nesqp->destroyed == 0)) {
3068 /* Flush the queue(s) */
3069 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
3070 flush_q |= NES_CQP_FLUSH_SQ;
3071 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
3073 if (nesqp->term_flags) {
3074 ibevent.device = nesqp->ibqp.device;
3075 ibevent.event = nesqp->terminate_eventtype;
3076 ibevent.element.qp = &nesqp->ibqp;
3077 if (nesqp->ibqp.event_handler)
3078 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
3082 if ((cm_id) && (cm_id->event_handler)) {
3083 if (issue_disconn) {
3084 atomic_inc(&cm_disconnects);
3085 cm_event.event = IW_CM_EVENT_DISCONNECT;
3086 cm_event.status = disconn_status;
3087 cm_event.local_addr = cm_id->local_addr;
3088 cm_event.remote_addr = cm_id->remote_addr;
3089 cm_event.private_data = NULL;
3090 cm_event.private_data_len = 0;
3092 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
3093 " for QP%u, SQ Head = %u, SQ Tail = %u. "
3094 "cm_id = %p, refcount = %u.\n",
3095 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
3096 nesqp->hwqp.sq_tail, cm_id,
3097 atomic_read(&nesqp->refcount));
3099 ret = cm_id->event_handler(cm_id, &cm_event);
3101 nes_debug(NES_DBG_CM, "OFA CM event_handler "
3102 "returned, ret=%d\n", ret);
3106 atomic_inc(&cm_closes);
3107 nes_disconnect(nesqp, 1);
3109 cm_id->provider_data = nesqp;
3110 /* Send up the close complete event */
3111 cm_event.event = IW_CM_EVENT_CLOSE;
3112 cm_event.status = 0;
3113 cm_event.provider_data = cm_id->provider_data;
3114 cm_event.local_addr = cm_id->local_addr;
3115 cm_event.remote_addr = cm_id->remote_addr;
3116 cm_event.private_data = NULL;
3117 cm_event.private_data_len = 0;
3119 ret = cm_id->event_handler(cm_id, &cm_event);
3121 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3123 cm_id->rem_ref(cm_id);
3134 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3137 struct nes_vnic *nesvnic;
3138 struct nes_device *nesdev;
3139 struct nes_ib_device *nesibdev;
3141 nesvnic = to_nesvnic(nesqp->ibqp.device);
3145 nesdev = nesvnic->nesdev;
3146 nesibdev = nesvnic->nesibdev;
3148 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3149 netdev_refcnt_read(nesvnic->netdev));
3151 if (nesqp->active_conn) {
3153 /* indicate this connection is NOT active */
3154 nesqp->active_conn = 0;
3156 /* Need to free the Last Streaming Mode Message */
3157 if (nesqp->ietf_frame) {
3159 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3160 pci_free_consistent(nesdev->pcidev,
3161 nesqp->private_data_len + nesqp->ietf_frame_size,
3162 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3166 /* close the CM node down if it is still active */
3167 if (nesqp->cm_node) {
3168 nes_debug(NES_DBG_CM, "Call close API\n");
3170 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3180 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3184 struct nes_qp *nesqp;
3185 struct nes_vnic *nesvnic;
3186 struct nes_device *nesdev;
3187 struct nes_cm_node *cm_node;
3188 struct nes_adapter *adapter;
3189 struct ib_qp_attr attr;
3190 struct iw_cm_event cm_event;
3191 struct nes_hw_qp_wqe *wqe;
3192 struct nes_v4_quad nes_quad;
3196 struct nes_ib_device *nesibdev;
3197 struct ib_mr *ibmr = NULL;
3198 struct ib_phys_buf ibphysbuf;
3199 struct nes_pd *nespd;
3201 u8 mpa_frame_offset = 0;
3202 struct ietf_mpa_v2 *mpa_v2_frame;
3204 u8 *start_ptr = &start_addr;
3205 u8 **start_buff = &start_ptr;
3207 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3208 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3210 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3214 /* get all our handles */
3215 nesqp = to_nesqp(ibqp);
3216 nesvnic = to_nesvnic(nesqp->ibqp.device);
3217 nesdev = nesvnic->nesdev;
3218 adapter = nesdev->nesadapter;
3220 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3221 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3222 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3223 nesvnic->netdev->name);
3225 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3226 if (cm_node->loopbackpartner)
3227 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3228 rem_ref_cm_node(cm_node->cm_core, cm_node);
3232 passive_state = atomic_add_return(1, &cm_node->passive_state);
3233 if (passive_state == NES_SEND_RESET_EVENT) {
3234 rem_ref_cm_node(cm_node->cm_core, cm_node);
3237 /* associate the node with the QP */
3238 nesqp->cm_node = (void *)cm_node;
3239 cm_node->nesqp = nesqp;
3242 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3243 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3244 atomic_inc(&cm_accepts);
3246 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3247 netdev_refcnt_read(nesvnic->netdev));
3249 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3250 /* allocate the ietf frame and space for private data */
3251 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3252 nesqp->ietf_frame_size + conn_param->private_data_len,
3253 &nesqp->ietf_frame_pbase);
3255 if (!nesqp->ietf_frame) {
3256 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3259 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3261 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3262 mpa_frame_offset = 4;
3264 if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3265 cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3266 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3269 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3270 conn_param->private_data_len);
3272 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3273 nesqp->private_data_len = conn_param->private_data_len;
3275 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3276 wqe = &nesqp->hwqp.sq_vbase[0];
3278 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3279 u64temp = (unsigned long)nesqp;
3280 nesibdev = nesvnic->nesibdev;
3281 nespd = nesqp->nespd;
3282 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3283 ibphysbuf.size = buff_len;
3284 tagged_offset = (u64)(unsigned long)*start_buff;
3285 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3287 IB_ACCESS_LOCAL_WRITE,
3290 nes_debug(NES_DBG_CM, "Unable to register memory region"
3291 "for lSMM for cm_node = %p \n",
3293 pci_free_consistent(nesdev->pcidev,
3294 nesqp->private_data_len + nesqp->ietf_frame_size,
3295 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3299 ibmr->pd = &nespd->ibpd;
3300 ibmr->device = nespd->ibpd.device;
3301 nesqp->lsmm_mr = ibmr;
3303 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3304 set_wqe_64bit_value(wqe->wqe_words,
3305 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3307 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3308 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3309 NES_IWARP_SQ_WQE_WRPDU);
3310 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3311 cpu_to_le32(buff_len);
3312 set_wqe_64bit_value(wqe->wqe_words,
3313 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3314 (u64)(unsigned long)(*start_buff));
3315 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3316 cpu_to_le32(buff_len);
3317 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3318 if (nesqp->sq_kmapped) {
3319 nesqp->sq_kmapped = 0;
3320 kunmap(nesqp->page);
3323 nesqp->nesqp_context->ird_ord_sizes |=
3324 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3325 NES_QPCONTEXT_ORDIRD_WRPDU);
3327 nesqp->nesqp_context->ird_ord_sizes |=
3328 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3330 nesqp->skip_lsmm = 1;
3332 /* Cache the cm_id in the qp */
3333 nesqp->cm_id = cm_id;
3334 cm_node->cm_id = cm_id;
3336 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3337 cm_id->provider_data = nesqp;
3338 nesqp->active_conn = 0;
3340 if (cm_node->state == NES_CM_STATE_TSA)
3341 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3344 nes_cm_init_tsa_conn(nesqp, cm_node);
3346 nesqp->nesqp_context->tcpPorts[0] =
3347 cpu_to_le16(cm_node->mapped_loc_port);
3348 nesqp->nesqp_context->tcpPorts[1] =
3349 cpu_to_le16(cm_node->mapped_rem_port);
3351 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3353 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3354 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3355 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3357 nesqp->nesqp_context->arp_index_vlan |=
3358 cpu_to_le32(nes_arp_table(nesdev,
3359 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3360 NES_ARP_RESOLVE) << 16);
3362 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3363 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3365 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3367 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3368 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3369 nesqp->nesqp_context->ird_ord_sizes |=
3370 cpu_to_le32((u32)cm_node->ord_size);
3372 memset(&nes_quad, 0, sizeof(nes_quad));
3373 nes_quad.DstIpAdrIndex =
3374 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3375 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3376 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3377 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3379 /* Produce hash key */
3380 crc_value = get_crc_value(&nes_quad);
3381 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3382 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3383 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3385 nesqp->hte_index &= adapter->hte_index_mask;
3386 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3388 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3390 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3391 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3392 "private data length=%u.\n", nesqp->hwqp.qp_id,
3393 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3394 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3395 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3396 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3399 /* notify OF layer that accept event was successful */
3400 cm_id->add_ref(cm_id);
3401 nes_add_ref(&nesqp->ibqp);
3403 cm_event.event = IW_CM_EVENT_ESTABLISHED;
3404 cm_event.status = 0;
3405 cm_event.provider_data = (void *)nesqp;
3406 cm_event.local_addr = cm_id->local_addr;
3407 cm_event.remote_addr = cm_id->remote_addr;
3408 cm_event.private_data = NULL;
3409 cm_event.private_data_len = 0;
3410 cm_event.ird = cm_node->ird_size;
3411 cm_event.ord = cm_node->ord_size;
3413 ret = cm_id->event_handler(cm_id, &cm_event);
3414 attr.qp_state = IB_QPS_RTS;
3415 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3416 if (cm_node->loopbackpartner) {
3417 cm_node->loopbackpartner->mpa_frame_size =
3418 nesqp->private_data_len;
3419 /* copy entire MPA frame to our cm_node's frame */
3420 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3421 conn_param->private_data, conn_param->private_data_len);
3422 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3425 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3426 "ret=%d\n", __func__, __LINE__, ret);
3435 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3437 struct nes_cm_node *cm_node;
3438 struct nes_cm_node *loopback;
3439 struct nes_cm_core *cm_core;
3442 atomic_inc(&cm_rejects);
3443 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3444 loopback = cm_node->loopbackpartner;
3445 cm_core = cm_node->cm_core;
3446 cm_node->cm_id = cm_id;
3448 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3452 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3453 loopback->mpa_frame.priv_data_len = pdata_len;
3454 loopback->mpa_frame_size = pdata_len;
3456 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3457 cm_node->mpa_frame_size = pdata_len;
3458 memcpy(start_buff, pdata, pdata_len);
3460 return cm_core->api->reject(cm_core, cm_node);
3466 * setup and launch cm connect node
3468 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3471 struct nes_qp *nesqp;
3472 struct nes_vnic *nesvnic;
3473 struct nes_device *nesdev;
3474 struct nes_cm_node *cm_node;
3475 struct nes_cm_info cm_info;
3477 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3478 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3479 struct iwpm_dev_data pm_reg_msg;
3480 struct iwpm_sa_data pm_msg;
3483 if (cm_id->remote_addr.ss_family != AF_INET)
3485 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3488 nesqp = to_nesqp(ibqp);
3491 nesvnic = to_nesvnic(nesqp->ibqp.device);
3494 nesdev = nesvnic->nesdev;
3498 if (!laddr->sin_port || !raddr->sin_port)
3501 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3502 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3503 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3504 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3505 ntohs(laddr->sin_port));
3507 atomic_inc(&cm_connects);
3508 nesqp->active_conn = 1;
3510 /* cache the cm_id in the qp */
3511 nesqp->cm_id = cm_id;
3512 cm_id->provider_data = nesqp;
3513 nesqp->private_data_len = conn_param->private_data_len;
3515 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3516 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3517 conn_param->private_data_len);
3519 /* set up the connection params for the node */
3520 cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3521 cm_info.loc_port = ntohs(laddr->sin_port);
3522 cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3523 cm_info.rem_port = ntohs(raddr->sin_port);
3524 cm_info.cm_id = cm_id;
3525 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3527 /* No port mapper available, go with the specified peer information */
3528 cm_info.mapped_loc_addr = cm_info.loc_addr;
3529 cm_info.mapped_loc_port = cm_info.loc_port;
3530 cm_info.mapped_rem_addr = cm_info.rem_addr;
3531 cm_info.mapped_rem_port = cm_info.rem_port;
3533 nes_form_reg_msg(nesvnic, &pm_reg_msg);
3534 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
3536 nes_debug(NES_DBG_NLMSG,
3537 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
3539 if (iwpm_valid_pid() && !iwpm_err) {
3540 nes_form_pm_msg(&cm_info, &pm_msg);
3541 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_NES);
3543 nes_debug(NES_DBG_NLMSG,
3544 "Port Mapper query fail (err = %d).\n", iwpm_err);
3546 nes_record_pm_msg(&cm_info, &pm_msg);
3549 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3550 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3551 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3555 if (nes_create_mapinfo(&cm_info))
3558 cm_id->add_ref(cm_id);
3560 /* create a connect CM node connection */
3561 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3562 conn_param->private_data_len, (void *)conn_param->private_data,
3566 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3567 PCI_FUNC(nesdev->pcidev->devfn),
3568 NES_MANAGE_APBVT_DEL);
3570 nes_debug(NES_DBG_NLMSG, "Delete mapped_loc_port = %04X\n",
3571 cm_info.mapped_loc_port);
3572 nes_remove_mapinfo(cm_info.loc_addr, cm_info.loc_port,
3573 cm_info.mapped_loc_addr, cm_info.mapped_loc_port);
3574 cm_id->rem_ref(cm_id);
3578 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3579 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3580 cm_node->ord_size == 0)
3581 cm_node->ord_size = 1;
3583 cm_node->apbvt_set = apbvt_set;
3584 nesqp->cm_node = cm_node;
3585 cm_node->nesqp = nesqp;
3586 nes_add_ref(&nesqp->ibqp);
3595 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3597 struct nes_vnic *nesvnic;
3598 struct nes_cm_listener *cm_node;
3599 struct nes_cm_info cm_info;
3601 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3603 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3604 cm_id, ntohs(laddr->sin_port));
3606 if (cm_id->local_addr.ss_family != AF_INET)
3608 nesvnic = to_nesvnic(cm_id->device);
3612 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3613 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3615 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3616 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3618 /* setup listen params in our api call struct */
3619 cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3620 cm_info.loc_port = ntohs(laddr->sin_port);
3621 cm_info.backlog = backlog;
3622 cm_info.cm_id = cm_id;
3624 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3626 /* No port mapper available, go with the specified info */
3627 cm_info.mapped_loc_addr = cm_info.loc_addr;
3628 cm_info.mapped_loc_port = cm_info.loc_port;
3630 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3632 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3633 __func__, __LINE__);
3637 cm_id->provider_data = cm_node;
3639 if (!cm_node->reused_node) {
3640 if (nes_create_mapinfo(&cm_info))
3643 err = nes_manage_apbvt(nesvnic, cm_node->mapped_loc_port,
3644 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3645 NES_MANAGE_APBVT_ADD);
3647 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3649 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3652 atomic_inc(&cm_listens_created);
3655 cm_id->add_ref(cm_id);
3656 cm_id->provider_data = (void *)cm_node;
3664 * nes_destroy_listen
3666 int nes_destroy_listen(struct iw_cm_id *cm_id)
3668 if (cm_id->provider_data)
3669 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3671 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3673 cm_id->rem_ref(cm_id);
3682 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3686 cm_packets_received++;
3687 if ((g_cm_core) && (g_cm_core->api))
3688 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3690 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3691 " cm is not setup properly.\n");
3699 * Start and init a cm core module
3701 int nes_cm_start(void)
3703 nes_debug(NES_DBG_CM, "\n");
3704 /* create the primary CM core, pass this handle to subsequent core inits */
3705 g_cm_core = nes_cm_alloc_core();
3715 * stop and dealloc all cm core instances
3717 int nes_cm_stop(void)
3719 g_cm_core->api->destroy_cm_core(g_cm_core);
3725 * cm_event_connected
3726 * handle a connected event, setup QPs and HW
3728 static void cm_event_connected(struct nes_cm_event *event)
3730 struct nes_qp *nesqp;
3731 struct nes_vnic *nesvnic;
3732 struct nes_device *nesdev;
3733 struct nes_cm_node *cm_node;
3734 struct nes_adapter *nesadapter;
3735 struct ib_qp_attr attr;
3736 struct iw_cm_id *cm_id;
3737 struct iw_cm_event cm_event;
3738 struct nes_v4_quad nes_quad;
3741 struct sockaddr_in *laddr;
3742 struct sockaddr_in *raddr;
3743 struct sockaddr_in *cm_event_laddr;
3745 /* get all our handles */
3746 cm_node = event->cm_node;
3747 cm_id = cm_node->cm_id;
3748 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3749 nesqp = (struct nes_qp *)cm_id->provider_data;
3750 nesvnic = to_nesvnic(nesqp->ibqp.device);
3751 nesdev = nesvnic->nesdev;
3752 nesadapter = nesdev->nesadapter;
3753 laddr = (struct sockaddr_in *)&cm_id->local_addr;
3754 raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3755 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3757 if (nesqp->destroyed)
3759 atomic_inc(&cm_connecteds);
3760 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3761 " local port 0x%04X. jiffies = %lu.\n",
3762 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3763 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3765 nes_cm_init_tsa_conn(nesqp, cm_node);
3767 /* set the QP tsa context */
3768 nesqp->nesqp_context->tcpPorts[0] =
3769 cpu_to_le16(cm_node->mapped_loc_port);
3770 nesqp->nesqp_context->tcpPorts[1] =
3771 cpu_to_le16(cm_node->mapped_rem_port);
3772 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3774 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3775 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3776 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3777 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3778 nes_arp_table(nesdev,
3779 le32_to_cpu(nesqp->nesqp_context->ip0),
3780 NULL, NES_ARP_RESOLVE) << 16);
3781 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3782 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3783 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3784 nesqp->nesqp_context->ird_ord_sizes |=
3785 cpu_to_le32((u32)1 <<
3786 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3787 nesqp->nesqp_context->ird_ord_sizes |=
3788 cpu_to_le32((u32)cm_node->ord_size);
3790 /* Adjust tail for not having a LSMM */
3791 /*nesqp->hwqp.sq_tail = 1;*/
3793 build_rdma0_msg(cm_node, &nesqp);
3795 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3796 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3798 memset(&nes_quad, 0, sizeof(nes_quad));
3800 nes_quad.DstIpAdrIndex =
3801 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3802 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3803 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3804 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3806 /* Produce hash key */
3807 crc_value = get_crc_value(&nes_quad);
3808 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3809 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3810 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3812 nesqp->hte_index &= nesadapter->hte_index_mask;
3813 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3815 nesqp->ietf_frame = &cm_node->mpa_frame;
3816 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3817 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3819 /* notify OF layer we successfully created the requested connection */
3820 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3821 cm_event.status = 0;
3822 cm_event.provider_data = cm_id->provider_data;
3823 cm_event_laddr->sin_family = AF_INET;
3824 cm_event_laddr->sin_port = laddr->sin_port;
3825 cm_event.remote_addr = cm_id->remote_addr;
3827 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3828 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3829 cm_event.ird = cm_node->ird_size;
3830 cm_event.ord = cm_node->ord_size;
3832 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3833 ret = cm_id->event_handler(cm_id, &cm_event);
3834 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3837 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3838 "ret=%d\n", __func__, __LINE__, ret);
3839 attr.qp_state = IB_QPS_RTS;
3840 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3842 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3843 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3850 * cm_event_connect_error
3852 static void cm_event_connect_error(struct nes_cm_event *event)
3854 struct nes_qp *nesqp;
3855 struct iw_cm_id *cm_id;
3856 struct iw_cm_event cm_event;
3857 /* struct nes_cm_info cm_info; */
3860 if (!event->cm_node)
3863 cm_id = event->cm_node->cm_id;
3867 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3868 nesqp = cm_id->provider_data;
3873 /* notify OF layer about this connection error event */
3874 /* cm_id->rem_ref(cm_id); */
3875 nesqp->cm_id = NULL;
3876 cm_id->provider_data = NULL;
3877 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3878 cm_event.status = -ECONNRESET;
3879 cm_event.provider_data = cm_id->provider_data;
3880 cm_event.local_addr = cm_id->local_addr;
3881 cm_event.remote_addr = cm_id->remote_addr;
3882 cm_event.private_data = NULL;
3883 cm_event.private_data_len = 0;
3885 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3887 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3888 &cm_event.local_addr;
3889 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3890 &cm_event.remote_addr;
3891 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3892 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3896 ret = cm_id->event_handler(cm_id, &cm_event);
3897 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3899 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3900 "ret=%d\n", __func__, __LINE__, ret);
3901 cm_id->rem_ref(cm_id);
3903 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3911 static void cm_event_reset(struct nes_cm_event *event)
3913 struct nes_qp *nesqp;
3914 struct iw_cm_id *cm_id;
3915 struct iw_cm_event cm_event;
3916 /* struct nes_cm_info cm_info; */
3919 if (!event->cm_node)
3922 if (!event->cm_node->cm_id)
3925 cm_id = event->cm_node->cm_id;
3927 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3928 nesqp = cm_id->provider_data;
3932 nesqp->cm_id = NULL;
3933 /* cm_id->provider_data = NULL; */
3934 cm_event.event = IW_CM_EVENT_DISCONNECT;
3935 cm_event.status = -ECONNRESET;
3936 cm_event.provider_data = cm_id->provider_data;
3937 cm_event.local_addr = cm_id->local_addr;
3938 cm_event.remote_addr = cm_id->remote_addr;
3939 cm_event.private_data = NULL;
3940 cm_event.private_data_len = 0;
3942 cm_id->add_ref(cm_id);
3943 ret = cm_id->event_handler(cm_id, &cm_event);
3944 atomic_inc(&cm_closes);
3945 cm_event.event = IW_CM_EVENT_CLOSE;
3946 cm_event.status = 0;
3947 cm_event.provider_data = cm_id->provider_data;
3948 cm_event.local_addr = cm_id->local_addr;
3949 cm_event.remote_addr = cm_id->remote_addr;
3950 cm_event.private_data = NULL;
3951 cm_event.private_data_len = 0;
3952 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3953 ret = cm_id->event_handler(cm_id, &cm_event);
3955 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3958 /* notify OF layer about this connection error event */
3959 cm_id->rem_ref(cm_id);
3968 static void cm_event_mpa_req(struct nes_cm_event *event)
3970 struct iw_cm_id *cm_id;
3971 struct iw_cm_event cm_event;
3973 struct nes_cm_node *cm_node;
3974 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3975 &cm_event.local_addr;
3976 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3977 &cm_event.remote_addr;
3979 cm_node = event->cm_node;
3982 cm_id = cm_node->cm_id;
3984 atomic_inc(&cm_connect_reqs);
3985 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3986 cm_node, cm_id, jiffies);
3988 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3989 cm_event.status = 0;
3990 cm_event.provider_data = (void *)cm_node;
3992 cm_event_laddr->sin_family = AF_INET;
3993 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3994 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3996 cm_event_raddr->sin_family = AF_INET;
3997 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3998 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3999 cm_event.private_data = cm_node->mpa_frame_buf;
4000 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4001 if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
4002 cm_event.ird = NES_MAX_IRD;
4003 cm_event.ord = NES_MAX_ORD;
4005 cm_event.ird = cm_node->ird_size;
4006 cm_event.ord = cm_node->ord_size;
4009 ret = cm_id->event_handler(cm_id, &cm_event);
4011 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4012 __func__, __LINE__, ret);
4017 static void cm_event_mpa_reject(struct nes_cm_event *event)
4019 struct iw_cm_id *cm_id;
4020 struct iw_cm_event cm_event;
4021 struct nes_cm_node *cm_node;
4023 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4024 &cm_event.local_addr;
4025 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4026 &cm_event.remote_addr;
4028 cm_node = event->cm_node;
4031 cm_id = cm_node->cm_id;
4033 atomic_inc(&cm_connect_reqs);
4034 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4035 cm_node, cm_id, jiffies);
4037 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
4038 cm_event.status = -ECONNREFUSED;
4039 cm_event.provider_data = cm_id->provider_data;
4041 cm_event_laddr->sin_family = AF_INET;
4042 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4043 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4045 cm_event_raddr->sin_family = AF_INET;
4046 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4047 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4049 cm_event.private_data = cm_node->mpa_frame_buf;
4050 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4052 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
4053 "remove_addr=%08x\n",
4054 cm_event_laddr->sin_addr.s_addr,
4055 cm_event_raddr->sin_addr.s_addr);
4057 ret = cm_id->event_handler(cm_id, &cm_event);
4059 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4060 __func__, __LINE__, ret);
4066 static void nes_cm_event_handler(struct work_struct *);
4070 * post an event to the cm event handler
4072 static int nes_cm_post_event(struct nes_cm_event *event)
4074 atomic_inc(&event->cm_node->cm_core->events_posted);
4075 add_ref_cm_node(event->cm_node);
4076 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4077 INIT_WORK(&event->event_work, nes_cm_event_handler);
4078 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
4079 event->cm_node, event);
4081 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4083 nes_debug(NES_DBG_CM, "Exit\n");
4089 * nes_cm_event_handler
4090 * worker function to handle cm events
4091 * will free instance of nes_cm_event
4093 static void nes_cm_event_handler(struct work_struct *work)
4095 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
4097 struct nes_cm_core *cm_core;
4099 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
4102 cm_core = event->cm_node->cm_core;
4103 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
4104 event, event->type, atomic_read(&cm_core->events_posted));
4106 switch (event->type) {
4107 case NES_CM_EVENT_MPA_REQ:
4108 cm_event_mpa_req(event);
4109 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
4112 case NES_CM_EVENT_RESET:
4113 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
4115 cm_event_reset(event);
4117 case NES_CM_EVENT_CONNECTED:
4118 if ((!event->cm_node->cm_id) ||
4119 (event->cm_node->state != NES_CM_STATE_TSA))
4121 cm_event_connected(event);
4122 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
4124 case NES_CM_EVENT_MPA_REJECT:
4125 if ((!event->cm_node->cm_id) ||
4126 (event->cm_node->state == NES_CM_STATE_TSA))
4128 cm_event_mpa_reject(event);
4129 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
4132 case NES_CM_EVENT_ABORTED:
4133 if ((!event->cm_node->cm_id) ||
4134 (event->cm_node->state == NES_CM_STATE_TSA))
4136 cm_event_connect_error(event);
4137 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
4139 case NES_CM_EVENT_DROPPED_PKT:
4140 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
4143 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
4147 atomic_dec(&cm_core->events_posted);
4148 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4149 rem_ref_cm_node(cm_core, event->cm_node);