2 * Copyright (c) 2006 - 2014 Intel Corporation. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #define TCPOPT_TIMESTAMP 8
37 #include <linux/atomic.h>
38 #include <linux/skbuff.h>
40 #include <linux/tcp.h>
41 #include <linux/init.h>
42 #include <linux/if_arp.h>
43 #include <linux/if_vlan.h>
44 #include <linux/notifier.h>
45 #include <linux/net.h>
46 #include <linux/types.h>
47 #include <linux/timer.h>
48 #include <linux/time.h>
49 #include <linux/delay.h>
50 #include <linux/etherdevice.h>
51 #include <linux/netdevice.h>
52 #include <linux/random.h>
53 #include <linux/list.h>
54 #include <linux/threads.h>
55 #include <linux/highmem.h>
56 #include <linux/slab.h>
58 #include <net/neighbour.h>
59 #include <net/route.h>
60 #include <net/ip_fib.h>
62 #include <linux/fcntl.h>
67 u32 cm_packets_bounced;
68 u32 cm_packets_dropped;
69 u32 cm_packets_retrans;
70 u32 cm_packets_created;
71 u32 cm_packets_received;
72 atomic_t cm_listens_created;
73 atomic_t cm_listens_destroyed;
75 atomic_t cm_loopbacks;
76 atomic_t cm_nodes_created;
77 atomic_t cm_nodes_destroyed;
78 atomic_t cm_accel_dropped_pkts;
79 atomic_t cm_resets_recvd;
81 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
82 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *);
83 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
84 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, struct nes_vnic *, u16, void *, struct nes_cm_info *);
85 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
86 static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *);
87 static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
88 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
89 static int mini_cm_dealloc_core(struct nes_cm_core *);
90 static int mini_cm_get(struct nes_cm_core *);
91 static int mini_cm_set(struct nes_cm_core *, u32, u32);
93 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
94 static int add_ref_cm_node(struct nes_cm_node *);
95 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
97 static int nes_cm_disconn_true(struct nes_qp *);
98 static int nes_cm_post_event(struct nes_cm_event *event);
99 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
100 static void nes_disconnect_worker(struct work_struct *work);
102 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
103 static int send_mpa_reject(struct nes_cm_node *);
104 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
105 static int send_reset(struct nes_cm_node *, struct sk_buff *);
106 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
107 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
108 static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
110 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
111 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
112 static void cleanup_retrans_entry(struct nes_cm_node *);
113 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
114 static void free_retrans_entry(struct nes_cm_node *cm_node);
115 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
117 /* CM event handler functions */
118 static void cm_event_connected(struct nes_cm_event *);
119 static void cm_event_connect_error(struct nes_cm_event *);
120 static void cm_event_reset(struct nes_cm_event *);
121 static void cm_event_mpa_req(struct nes_cm_event *);
122 static void cm_event_mpa_reject(struct nes_cm_event *);
123 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
125 /* MPA build functions */
126 static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
127 static void build_mpa_v2(struct nes_cm_node *, void *, u8);
128 static void build_mpa_v1(struct nes_cm_node *, void *, u8);
129 static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
131 static void print_core(struct nes_cm_core *core);
132 static void record_ird_ord(struct nes_cm_node *, u16, u16);
134 /* External CM API Interface */
135 /* instance of function pointers for client API */
136 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
137 static const struct nes_cm_ops nes_cm_api = {
138 .accelerated = mini_cm_accelerated,
139 .listen = mini_cm_listen,
140 .stop_listener = mini_cm_del_listen,
141 .connect = mini_cm_connect,
142 .close = mini_cm_close,
143 .accept = mini_cm_accept,
144 .reject = mini_cm_reject,
145 .recv_pkt = mini_cm_recv_pkt,
146 .destroy_cm_core = 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->loc_addr);
486 iph->daddr = htonl(cm_node->rem_addr);
488 tcph->source = htons(cm_node->loc_port);
489 tcph->dest = htons(cm_node->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 * print_core - dump a cm core
531 static void print_core(struct nes_cm_core *core)
533 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
534 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
537 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
539 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
541 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
542 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
544 nes_debug(NES_DBG_CM, "core : %p \n", core);
546 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
549 static void record_ird_ord(struct nes_cm_node *cm_node,
550 u16 conn_ird, u16 conn_ord)
552 if (conn_ird > NES_MAX_IRD)
553 conn_ird = NES_MAX_IRD;
555 if (conn_ord > NES_MAX_ORD)
556 conn_ord = NES_MAX_ORD;
558 cm_node->ird_size = conn_ird;
559 cm_node->ord_size = conn_ord;
563 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
565 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
566 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
570 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
572 switch (cm_node->mpa_frame_rev) {
574 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
575 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
576 build_mpa_v1(cm_node, *start_buff, mpa_key);
579 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
580 build_mpa_v2(cm_node, *start_buff, mpa_key);
589 * build_mpa_v2 - build a MPA V2 frame
591 static void build_mpa_v2(struct nes_cm_node *cm_node,
592 void *start_addr, u8 mpa_key)
594 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
595 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
599 /* initialize the upper 5 bytes of the frame */
600 build_mpa_v1(cm_node, start_addr, mpa_key);
601 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
602 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
604 /* initialize RTR msg */
605 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
606 ctrl_ird = IETF_NO_IRD_ORD;
607 ctrl_ord = IETF_NO_IRD_ORD;
609 ctrl_ird = cm_node->ird_size & IETF_NO_IRD_ORD;
610 ctrl_ord = cm_node->ord_size & IETF_NO_IRD_ORD;
612 ctrl_ird |= IETF_PEER_TO_PEER;
615 case MPA_KEY_REQUEST:
616 ctrl_ord |= IETF_RDMA0_WRITE;
617 ctrl_ord |= IETF_RDMA0_READ;
620 switch (cm_node->send_rdma0_op) {
621 case SEND_RDMA_WRITE_ZERO:
622 ctrl_ord |= IETF_RDMA0_WRITE;
624 case SEND_RDMA_READ_ZERO:
625 ctrl_ord |= IETF_RDMA0_READ;
629 rtr_msg->ctrl_ird = htons(ctrl_ird);
630 rtr_msg->ctrl_ord = htons(ctrl_ord);
634 * build_mpa_v1 - build a MPA V1 frame
636 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
638 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
641 case MPA_KEY_REQUEST:
642 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
645 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
648 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
649 mpa_frame->rev = cm_node->mpa_frame_rev;
650 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
653 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
656 struct nes_qp *nesqp = *nesqp_addr;
657 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
659 u64temp = (unsigned long)nesqp->nesuqp_addr;
660 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
661 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
663 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
664 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
666 switch (cm_node->send_rdma0_op) {
667 case SEND_RDMA_WRITE_ZERO:
668 nes_debug(NES_DBG_CM, "Sending first write.\n");
669 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
670 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
671 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
672 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
673 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
676 case SEND_RDMA_READ_ZERO:
678 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
679 WARN(1, "Unsupported RDMA0 len operation=%u\n",
680 cm_node->send_rdma0_op);
681 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
682 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
683 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
684 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
685 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
686 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
687 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
688 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
692 if (nesqp->sq_kmapped) {
693 nesqp->sq_kmapped = 0;
697 /*use the reserved spot on the WQ for the extra first WQE*/
698 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
699 NES_QPCONTEXT_ORDIRD_WRPDU |
700 NES_QPCONTEXT_ORDIRD_ALSMM));
701 nesqp->skip_lsmm = 1;
702 nesqp->hwqp.sq_tail = 0;
707 * note - cm_node needs to be protected before calling this. Encase in:
708 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
710 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
711 enum nes_timer_type type, int send_retrans,
712 int close_when_complete)
715 struct nes_cm_core *cm_core = cm_node->cm_core;
716 struct nes_timer_entry *new_send;
719 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
723 /* new_send->timetosend = currenttime */
724 new_send->retrycount = NES_DEFAULT_RETRYS;
725 new_send->retranscount = NES_DEFAULT_RETRANS;
727 new_send->timetosend = jiffies;
728 new_send->type = type;
729 new_send->netdev = cm_node->netdev;
730 new_send->send_retrans = send_retrans;
731 new_send->close_when_complete = close_when_complete;
733 if (type == NES_TIMER_TYPE_CLOSE) {
734 new_send->timetosend += (HZ / 10);
735 if (cm_node->recv_entry) {
740 cm_node->recv_entry = new_send;
743 if (type == NES_TIMER_TYPE_SEND) {
744 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
745 refcount_inc(&new_send->skb->users);
746 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
747 cm_node->send_entry = new_send;
748 add_ref_cm_node(cm_node);
749 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
750 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
752 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
753 if (ret != NETDEV_TX_OK) {
754 nes_debug(NES_DBG_CM, "Error sending packet %p "
755 "(jiffies = %lu)\n", new_send, jiffies);
756 new_send->timetosend = jiffies;
761 cleanup_retrans_entry(cm_node);
762 if (close_when_complete)
763 rem_ref_cm_node(cm_core, cm_node);
769 if (!timer_pending(&cm_core->tcp_timer))
770 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
775 static void nes_retrans_expired(struct nes_cm_node *cm_node)
777 struct iw_cm_id *cm_id = cm_node->cm_id;
778 enum nes_cm_node_state state = cm_node->state;
779 cm_node->state = NES_CM_STATE_CLOSED;
782 case NES_CM_STATE_SYN_RCVD:
783 case NES_CM_STATE_CLOSING:
784 rem_ref_cm_node(cm_node->cm_core, cm_node);
786 case NES_CM_STATE_LAST_ACK:
787 case NES_CM_STATE_FIN_WAIT1:
789 cm_id->rem_ref(cm_id);
790 send_reset(cm_node, NULL);
793 add_ref_cm_node(cm_node);
794 send_reset(cm_node, NULL);
795 create_event(cm_node, NES_CM_EVENT_ABORTED);
799 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
801 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
802 struct iw_cm_id *cm_id = cm_node->cm_id;
803 struct nes_qp *nesqp;
804 unsigned long qplockflags;
808 nesqp = (struct nes_qp *)recv_entry->skb;
810 spin_lock_irqsave(&nesqp->lock, qplockflags);
812 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
813 "refcount = %d: HIT A "
814 "NES_TIMER_TYPE_CLOSE with something "
815 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
816 atomic_read(&nesqp->refcount));
817 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
818 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
819 nesqp->ibqp_state = IB_QPS_ERR;
820 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
821 nes_cm_disconn(nesqp);
823 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
824 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
825 "refcount = %d: HIT A "
826 "NES_TIMER_TYPE_CLOSE with nothing "
827 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
828 atomic_read(&nesqp->refcount));
830 } else if (rem_node) {
831 /* TIME_WAIT state */
832 rem_ref_cm_node(cm_node->cm_core, cm_node);
835 cm_id->rem_ref(cm_id);
837 cm_node->recv_entry = NULL;
843 static void nes_cm_timer_tick(unsigned long pass)
846 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
847 struct nes_cm_node *cm_node;
848 struct nes_timer_entry *send_entry, *recv_entry;
849 struct list_head *list_core_temp;
850 struct list_head *list_node;
851 struct nes_cm_core *cm_core = g_cm_core;
853 unsigned long timetosend;
854 int ret = NETDEV_TX_OK;
856 struct list_head timer_list;
858 INIT_LIST_HEAD(&timer_list);
859 spin_lock_irqsave(&cm_core->ht_lock, flags);
861 list_for_each_safe(list_node, list_core_temp,
862 &cm_core->connected_nodes) {
863 cm_node = container_of(list_node, struct nes_cm_node, list);
864 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
865 add_ref_cm_node(cm_node);
866 list_add(&cm_node->timer_entry, &timer_list);
869 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
871 list_for_each_safe(list_node, list_core_temp, &timer_list) {
872 cm_node = container_of(list_node, struct nes_cm_node,
874 recv_entry = cm_node->recv_entry;
877 if (time_after(recv_entry->timetosend, jiffies)) {
878 if (nexttimeout > recv_entry->timetosend ||
880 nexttimeout = recv_entry->timetosend;
884 handle_recv_entry(cm_node, 1);
888 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
890 send_entry = cm_node->send_entry;
893 if (time_after(send_entry->timetosend, jiffies)) {
894 if (cm_node->state != NES_CM_STATE_TSA) {
896 send_entry->timetosend) ||
899 send_entry->timetosend;
903 free_retrans_entry(cm_node);
908 if ((cm_node->state == NES_CM_STATE_TSA) ||
909 (cm_node->state == NES_CM_STATE_CLOSED)) {
910 free_retrans_entry(cm_node);
914 if (!send_entry->retranscount ||
915 !send_entry->retrycount) {
916 cm_packets_dropped++;
917 free_retrans_entry(cm_node);
919 spin_unlock_irqrestore(
920 &cm_node->retrans_list_lock, flags);
921 nes_retrans_expired(cm_node);
922 cm_node->state = NES_CM_STATE_CLOSED;
923 spin_lock_irqsave(&cm_node->retrans_list_lock,
927 refcount_inc(&send_entry->skb->users);
928 cm_packets_retrans++;
929 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
930 "for node %p, jiffies = %lu, time to send = "
931 "%lu, retranscount = %u, send_entry->seq_num = "
932 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
933 "0x%08X\n", send_entry, cm_node, jiffies,
934 send_entry->timetosend,
935 send_entry->retranscount,
937 cm_node->tcp_cntxt.rem_ack_num);
939 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
941 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
942 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
943 if (ret != NETDEV_TX_OK) {
944 nes_debug(NES_DBG_CM, "rexmit failed for "
945 "node=%p\n", cm_node);
946 cm_packets_bounced++;
947 send_entry->retrycount--;
948 nexttimeout = jiffies + NES_SHORT_TIME;
954 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
955 "%u, retry count = %u.\n",
956 send_entry->retranscount,
957 send_entry->retrycount);
958 if (send_entry->send_retrans) {
959 send_entry->retranscount--;
960 timetosend = (NES_RETRY_TIMEOUT <<
961 (NES_DEFAULT_RETRANS - send_entry->retranscount));
963 send_entry->timetosend = jiffies +
964 min(timetosend, NES_MAX_TIMEOUT);
965 if (nexttimeout > send_entry->timetosend ||
967 nexttimeout = send_entry->timetosend;
971 int close_when_complete;
972 close_when_complete =
973 send_entry->close_when_complete;
974 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
975 cm_node, cm_node->state);
976 free_retrans_entry(cm_node);
977 if (close_when_complete)
978 rem_ref_cm_node(cm_node->cm_core,
983 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
984 rem_ref_cm_node(cm_node->cm_core, cm_node);
988 if (!timer_pending(&cm_core->tcp_timer))
989 mod_timer(&cm_core->tcp_timer, nexttimeout);
997 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
1001 int flags = SET_SYN;
1002 char optionsbuffer[sizeof(struct option_mss) +
1003 sizeof(struct option_windowscale) + sizeof(struct option_base) +
1004 TCP_OPTIONS_PADDING];
1006 int optionssize = 0;
1007 /* Sending MSS option */
1008 union all_known_options *options;
1013 options = (union all_known_options *)&optionsbuffer[optionssize];
1014 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1015 options->as_mss.length = sizeof(struct option_mss);
1016 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1017 optionssize += sizeof(struct option_mss);
1019 options = (union all_known_options *)&optionsbuffer[optionssize];
1020 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1021 options->as_windowscale.length = sizeof(struct option_windowscale);
1022 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1023 optionssize += sizeof(struct option_windowscale);
1025 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
1026 options = (union all_known_options *)&optionsbuffer[optionssize];
1027 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
1028 options->as_base.length = sizeof(struct option_base);
1029 optionssize += sizeof(struct option_base);
1030 /* we need the size to be a multiple of 4 */
1031 options = (union all_known_options *)&optionsbuffer[optionssize];
1032 options->as_end = 1;
1034 options = (union all_known_options *)&optionsbuffer[optionssize];
1035 options->as_end = 1;
1039 options = (union all_known_options *)&optionsbuffer[optionssize];
1040 options->as_end = OPTION_NUMBER_END;
1044 skb = dev_alloc_skb(MAX_CM_BUFFER);
1046 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1053 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1054 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1063 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1066 int flags = SET_RST | SET_ACK;
1069 skb = dev_alloc_skb(MAX_CM_BUFFER);
1071 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1075 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1076 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1085 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1090 skb = dev_alloc_skb(MAX_CM_BUFFER);
1093 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1097 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1098 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1107 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1111 /* if we didn't get a frame get one */
1113 skb = dev_alloc_skb(MAX_CM_BUFFER);
1116 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1120 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1121 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1128 * find_node - find a cm node that matches the reference cm node
1130 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1131 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1133 unsigned long flags;
1134 struct list_head *hte;
1135 struct nes_cm_node *cm_node;
1137 /* get a handle on the hte */
1138 hte = &cm_core->connected_nodes;
1140 /* walk list and find cm_node associated with this session ID */
1141 spin_lock_irqsave(&cm_core->ht_lock, flags);
1142 list_for_each_entry(cm_node, hte, list) {
1143 /* compare quad, return node handle if a match */
1144 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1145 cm_node->loc_addr, cm_node->loc_port,
1147 cm_node->rem_addr, cm_node->rem_port,
1148 rem_addr, rem_port);
1149 if ((cm_node->loc_addr == loc_addr) &&
1150 (cm_node->loc_port == loc_port) &&
1151 (cm_node->rem_addr == rem_addr) &&
1152 (cm_node->rem_port == rem_port)) {
1153 add_ref_cm_node(cm_node);
1154 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1158 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1166 * find_listener - find a cm node listening on this addr-port pair
1168 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1169 nes_addr_t dst_addr, u16 dst_port,
1170 enum nes_cm_listener_state listener_state)
1172 unsigned long flags;
1173 struct nes_cm_listener *listen_node;
1174 nes_addr_t listen_addr;
1177 /* walk list and find cm_node associated with this session ID */
1178 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1179 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1180 listen_addr = listen_node->loc_addr;
1181 listen_port = listen_node->loc_port;
1183 /* compare node pair, return node handle if a match */
1184 if (((listen_addr == dst_addr) ||
1185 listen_addr == 0x00000000) &&
1186 (listen_port == dst_port) &&
1187 (listener_state & listen_node->listener_state)) {
1188 atomic_inc(&listen_node->ref_count);
1189 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1193 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1200 * add_hte_node - add a cm node to the hash table
1202 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1204 unsigned long flags;
1205 struct list_head *hte;
1207 if (!cm_node || !cm_core)
1210 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1213 spin_lock_irqsave(&cm_core->ht_lock, flags);
1215 /* get a handle on the hash table element (list head for this slot) */
1216 hte = &cm_core->connected_nodes;
1217 list_add_tail(&cm_node->list, hte);
1218 atomic_inc(&cm_core->ht_node_cnt);
1220 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1227 * mini_cm_dec_refcnt_listen
1229 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1230 struct nes_cm_listener *listener, int free_hanging_nodes)
1234 unsigned long flags;
1235 struct list_head *list_pos = NULL;
1236 struct list_head *list_temp = NULL;
1237 struct nes_cm_node *cm_node = NULL;
1238 struct list_head reset_list;
1240 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1241 "refcnt=%d\n", listener, free_hanging_nodes,
1242 atomic_read(&listener->ref_count));
1243 /* free non-accelerated child nodes for this listener */
1244 INIT_LIST_HEAD(&reset_list);
1245 if (free_hanging_nodes) {
1246 spin_lock_irqsave(&cm_core->ht_lock, flags);
1247 list_for_each_safe(list_pos, list_temp,
1248 &g_cm_core->connected_nodes) {
1249 cm_node = container_of(list_pos, struct nes_cm_node,
1251 if ((cm_node->listener == listener) &&
1252 (!cm_node->accelerated)) {
1253 add_ref_cm_node(cm_node);
1254 list_add(&cm_node->reset_entry, &reset_list);
1257 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1260 list_for_each_safe(list_pos, list_temp, &reset_list) {
1261 cm_node = container_of(list_pos, struct nes_cm_node,
1264 struct nes_cm_node *loopback = cm_node->loopbackpartner;
1265 enum nes_cm_node_state old_state;
1266 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1267 rem_ref_cm_node(cm_node->cm_core, cm_node);
1270 cleanup_retrans_entry(cm_node);
1271 err = send_reset(cm_node, NULL);
1274 NES_CM_STATE_CLOSED;
1277 old_state = cm_node->state;
1278 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1279 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1285 struct nes_cm_event event;
1287 event.cm_node = loopback;
1288 event.cm_info.rem_addr =
1290 event.cm_info.loc_addr =
1292 event.cm_info.rem_port =
1294 event.cm_info.loc_port =
1296 event.cm_info.cm_id = loopback->cm_id;
1297 add_ref_cm_node(loopback);
1298 loopback->state = NES_CM_STATE_CLOSED;
1299 cm_event_connect_error(&event);
1300 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1302 rem_ref_cm_node(cm_node->cm_core,
1310 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1311 if (!atomic_dec_return(&listener->ref_count)) {
1312 list_del(&listener->list);
1314 /* decrement our listen node count */
1315 atomic_dec(&cm_core->listen_node_cnt);
1317 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1319 if (listener->nesvnic) {
1320 nes_manage_apbvt(listener->nesvnic,
1322 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn),
1323 NES_MANAGE_APBVT_DEL);
1325 nes_debug(NES_DBG_NLMSG,
1326 "Delete APBVT loc_port = %04X\n",
1327 listener->loc_port);
1330 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1335 atomic_inc(&cm_listens_destroyed);
1337 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1340 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1341 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1342 " with non-zero pending accepts=%u\n",
1343 listener, atomic_read(&listener->pend_accepts_cnt));
1351 * mini_cm_del_listen
1353 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1354 struct nes_cm_listener *listener)
1356 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1357 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1358 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1363 * mini_cm_accelerated
1365 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1366 struct nes_cm_node *cm_node)
1368 cm_node->accelerated = 1;
1370 if (cm_node->accept_pend) {
1371 BUG_ON(!cm_node->listener);
1372 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1373 cm_node->accept_pend = 0;
1374 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1377 if (!timer_pending(&cm_core->tcp_timer))
1378 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
1385 * nes_addr_resolve_neigh
1387 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1390 struct neighbour *neigh;
1392 struct net_device *netdev;
1393 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1394 __be32 dst_ipaddr = htonl(dst_ip);
1396 rt = ip_route_output(&init_net, dst_ipaddr, nesvnic->local_ipaddr, 0, 0);
1398 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1403 if (netif_is_bond_slave(nesvnic->netdev))
1404 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
1406 netdev = nesvnic->netdev;
1408 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1412 if (neigh->nud_state & NUD_VALID) {
1413 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1414 " is %pM, Gateway is 0x%08X \n", dst_ip,
1415 neigh->ha, ntohl(rt->rt_gateway));
1417 if (arpindex >= 0) {
1418 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
1419 /* Mac address same as in nes_arp_table */
1423 nes_manage_arp_cache(nesvnic->netdev,
1424 nesadapter->arp_table[arpindex].mac_addr,
1425 dst_ip, NES_ARP_DELETE);
1428 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1429 dst_ip, NES_ARP_ADD);
1430 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1433 neigh_event_send(neigh, NULL);
1440 neigh_release(neigh);
1447 * make_cm_node - create a new instance of a cm node
1449 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1450 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1451 struct nes_cm_listener *listener)
1453 struct nes_cm_node *cm_node;
1455 int oldarpindex = 0;
1457 struct nes_device *nesdev;
1458 struct nes_adapter *nesadapter;
1460 /* create an hte and cm_node for this instance */
1461 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1465 /* set our node specific transport info */
1467 cm_node->loc_addr = listener->loc_addr;
1468 cm_node->loc_port = listener->loc_port;
1470 cm_node->loc_addr = cm_info->loc_addr;
1471 cm_node->loc_port = cm_info->loc_port;
1473 cm_node->rem_addr = cm_info->rem_addr;
1474 cm_node->rem_port = cm_info->rem_port;
1476 cm_node->mpa_frame_rev = mpa_version;
1477 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1478 cm_node->mpav2_ird_ord = 0;
1479 cm_node->ird_size = 0;
1480 cm_node->ord_size = 0;
1482 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1483 &cm_node->loc_addr, cm_node->loc_port,
1484 &cm_node->rem_addr, cm_node->rem_port);
1485 cm_node->listener = listener;
1487 cm_node->tos = listener->tos;
1488 cm_node->netdev = nesvnic->netdev;
1489 cm_node->cm_id = cm_info->cm_id;
1490 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1492 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1495 spin_lock_init(&cm_node->retrans_list_lock);
1497 cm_node->loopbackpartner = NULL;
1498 atomic_set(&cm_node->ref_count, 1);
1499 /* associate our parent CM core */
1500 cm_node->cm_core = cm_core;
1501 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1502 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1503 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1504 NES_CM_DEFAULT_RCV_WND_SCALE;
1505 ts = current_kernel_time();
1506 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1507 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1508 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1509 cm_node->tcp_cntxt.rcv_nxt = 0;
1510 /* get a unique session ID , add thread_id to an upcounter to handle race */
1511 atomic_inc(&cm_core->node_cnt);
1512 cm_node->conn_type = cm_info->conn_type;
1513 cm_node->apbvt_set = 0;
1514 cm_node->accept_pend = 0;
1516 cm_node->nesvnic = nesvnic;
1517 /* get some device handles, for arp lookup */
1518 nesdev = nesvnic->nesdev;
1519 nesadapter = nesdev->nesadapter;
1521 cm_node->loopbackpartner = NULL;
1523 /* get the mac addr for the remote node */
1524 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr,
1525 NULL, NES_ARP_RESOLVE);
1526 arpindex = nes_addr_resolve_neigh(nesvnic, cm_node->rem_addr,
1533 /* copy the mac addr to node context */
1534 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1535 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1538 add_hte_node(cm_core, cm_node);
1539 atomic_inc(&cm_nodes_created);
1546 * add_ref_cm_node - destroy an instance of a cm node
1548 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1550 atomic_inc(&cm_node->ref_count);
1556 * rem_ref_cm_node - destroy an instance of a cm node
1558 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1559 struct nes_cm_node *cm_node)
1561 unsigned long flags;
1562 struct nes_qp *nesqp;
1567 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1568 if (atomic_dec_return(&cm_node->ref_count)) {
1569 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1572 list_del(&cm_node->list);
1573 atomic_dec(&cm_core->ht_node_cnt);
1574 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1576 /* if the node is destroyed before connection was accelerated */
1577 if (!cm_node->accelerated && cm_node->accept_pend) {
1578 BUG_ON(!cm_node->listener);
1579 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1580 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1582 WARN_ON(cm_node->send_entry);
1583 if (cm_node->recv_entry)
1584 handle_recv_entry(cm_node, 0);
1585 if (cm_node->listener) {
1586 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1588 if (cm_node->apbvt_set && cm_node->nesvnic) {
1589 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1590 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1591 NES_MANAGE_APBVT_DEL);
1593 nes_debug(NES_DBG_NLMSG, "Delete APBVT loc_port = %04X\n",
1597 atomic_dec(&cm_core->node_cnt);
1598 atomic_inc(&cm_nodes_destroyed);
1599 nesqp = cm_node->nesqp;
1601 nesqp->cm_node = NULL;
1602 nes_rem_ref(&nesqp->ibqp);
1603 cm_node->nesqp = NULL;
1613 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1614 u32 optionsize, u32 syn_packet)
1618 union all_known_options *all_options;
1619 char got_mss_option = 0;
1621 while (offset < optionsize) {
1622 all_options = (union all_known_options *)(optionsloc + offset);
1623 switch (all_options->as_base.optionnum) {
1624 case OPTION_NUMBER_END:
1625 offset = optionsize;
1627 case OPTION_NUMBER_NONE:
1630 case OPTION_NUMBER_MSS:
1631 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1632 "Size: %d\n", __func__,
1633 all_options->as_mss.length, offset, optionsize);
1635 if (all_options->as_mss.length != 4) {
1638 tmp = ntohs(all_options->as_mss.mss);
1639 if (tmp > 0 && tmp <
1640 cm_node->tcp_cntxt.mss)
1641 cm_node->tcp_cntxt.mss = tmp;
1644 case OPTION_NUMBER_WINDOW_SCALE:
1645 cm_node->tcp_cntxt.snd_wscale =
1646 all_options->as_windowscale.shiftcount;
1649 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1650 all_options->as_base.optionnum);
1653 offset += all_options->as_base.length;
1655 if ((!got_mss_option) && (syn_packet))
1656 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1660 static void drop_packet(struct sk_buff *skb)
1662 atomic_inc(&cm_accel_dropped_pkts);
1663 dev_kfree_skb_any(skb);
1666 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1668 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1669 "refcnt=%d\n", cm_node, cm_node->state,
1670 atomic_read(&cm_node->ref_count));
1671 switch (cm_node->state) {
1672 case NES_CM_STATE_SYN_RCVD:
1673 case NES_CM_STATE_SYN_SENT:
1674 case NES_CM_STATE_ESTABLISHED:
1675 case NES_CM_STATE_MPAREJ_RCVD:
1676 cm_node->tcp_cntxt.rcv_nxt++;
1677 cleanup_retrans_entry(cm_node);
1678 cm_node->state = NES_CM_STATE_LAST_ACK;
1679 send_fin(cm_node, NULL);
1681 case NES_CM_STATE_MPAREQ_SENT:
1682 create_event(cm_node, NES_CM_EVENT_ABORTED);
1683 cm_node->tcp_cntxt.rcv_nxt++;
1684 cleanup_retrans_entry(cm_node);
1685 cm_node->state = NES_CM_STATE_CLOSED;
1686 add_ref_cm_node(cm_node);
1687 send_reset(cm_node, NULL);
1689 case NES_CM_STATE_FIN_WAIT1:
1690 cm_node->tcp_cntxt.rcv_nxt++;
1691 cleanup_retrans_entry(cm_node);
1692 cm_node->state = NES_CM_STATE_CLOSING;
1693 send_ack(cm_node, NULL);
1694 /* Wait for ACK as this is simultaneous close..
1695 * After we receive ACK, do not send anything..
1696 * Just rm the node.. Done.. */
1698 case NES_CM_STATE_FIN_WAIT2:
1699 cm_node->tcp_cntxt.rcv_nxt++;
1700 cleanup_retrans_entry(cm_node);
1701 cm_node->state = NES_CM_STATE_TIME_WAIT;
1702 send_ack(cm_node, NULL);
1703 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1705 case NES_CM_STATE_TIME_WAIT:
1706 cm_node->tcp_cntxt.rcv_nxt++;
1707 cleanup_retrans_entry(cm_node);
1708 cm_node->state = NES_CM_STATE_CLOSED;
1709 rem_ref_cm_node(cm_node->cm_core, cm_node);
1711 case NES_CM_STATE_TSA:
1713 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1714 cm_node, cm_node->state);
1720 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1721 struct tcphdr *tcph)
1724 int reset = 0; /* whether to send reset in case of err.. */
1725 atomic_inc(&cm_resets_recvd);
1726 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1727 " refcnt=%d\n", cm_node, cm_node->state,
1728 atomic_read(&cm_node->ref_count));
1729 cleanup_retrans_entry(cm_node);
1730 switch (cm_node->state) {
1731 case NES_CM_STATE_SYN_SENT:
1732 case NES_CM_STATE_MPAREQ_SENT:
1733 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1734 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1735 cm_node->listener, cm_node->state);
1736 switch (cm_node->mpa_frame_rev) {
1738 cm_node->mpa_frame_rev = IETF_MPA_V1;
1739 /* send a syn and goto syn sent state */
1740 cm_node->state = NES_CM_STATE_SYN_SENT;
1741 if (send_syn(cm_node, 0, NULL)) {
1742 active_open_err(cm_node, skb, reset);
1747 active_open_err(cm_node, skb, reset);
1751 case NES_CM_STATE_MPAREQ_RCVD:
1752 atomic_inc(&cm_node->passive_state);
1753 dev_kfree_skb_any(skb);
1755 case NES_CM_STATE_ESTABLISHED:
1756 case NES_CM_STATE_SYN_RCVD:
1757 case NES_CM_STATE_LISTENING:
1758 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1759 passive_open_err(cm_node, skb, reset);
1761 case NES_CM_STATE_TSA:
1762 active_open_err(cm_node, skb, reset);
1764 case NES_CM_STATE_CLOSED:
1767 case NES_CM_STATE_FIN_WAIT2:
1768 case NES_CM_STATE_FIN_WAIT1:
1769 case NES_CM_STATE_LAST_ACK:
1770 cm_node->cm_id->rem_ref(cm_node->cm_id);
1771 case NES_CM_STATE_TIME_WAIT:
1772 cm_node->state = NES_CM_STATE_CLOSED;
1773 rem_ref_cm_node(cm_node->cm_core, cm_node);
1783 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1786 int datasize = skb->len;
1787 u8 *dataloc = skb->data;
1789 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1792 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1794 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1795 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1796 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1797 "cm_node=%p listener=%p state=%d\n", __func__,
1798 __LINE__, cm_node, cm_node->listener,
1800 active_open_err(cm_node, skb, 1);
1802 passive_open_err(cm_node, skb, 1);
1807 switch (cm_node->state) {
1808 case NES_CM_STATE_ESTABLISHED:
1809 if (res_type == NES_MPA_REQUEST_REJECT)
1810 /*BIG problem as we are receiving the MPA.. So should
1811 * not be REJECT.. This is Passive Open.. We can
1812 * only receive it Reject for Active Open...*/
1814 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1815 type = NES_CM_EVENT_MPA_REQ;
1816 atomic_set(&cm_node->passive_state,
1817 NES_PASSIVE_STATE_INDICATED);
1819 case NES_CM_STATE_MPAREQ_SENT:
1820 cleanup_retrans_entry(cm_node);
1821 if (res_type == NES_MPA_REQUEST_REJECT) {
1822 type = NES_CM_EVENT_MPA_REJECT;
1823 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1825 type = NES_CM_EVENT_CONNECTED;
1826 cm_node->state = NES_CM_STATE_TSA;
1828 send_ack(cm_node, NULL);
1834 dev_kfree_skb_any(skb);
1835 create_event(cm_node, type);
1838 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1840 switch (cm_node->state) {
1841 case NES_CM_STATE_SYN_SENT:
1842 case NES_CM_STATE_MPAREQ_SENT:
1843 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1844 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1845 cm_node->listener, cm_node->state);
1846 active_open_err(cm_node, skb, 1);
1848 case NES_CM_STATE_ESTABLISHED:
1849 case NES_CM_STATE_SYN_RCVD:
1850 passive_open_err(cm_node, skb, 1);
1852 case NES_CM_STATE_TSA:
1858 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1859 struct sk_buff *skb)
1863 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1865 active_open_err(cm_node, skb, 1);
1870 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1871 struct sk_buff *skb)
1876 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1877 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1880 seq = ntohl(tcph->seq);
1881 ack_seq = ntohl(tcph->ack_seq);
1882 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1883 if (ack_seq != loc_seq_num)
1885 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
1888 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1889 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1890 cm_node->listener, cm_node->state);
1891 indicate_pkt_err(cm_node, skb);
1892 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1893 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1900 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1901 * is created with a listener or it may comein as rexmitted packet which in
1902 * that case will be just dropped.
1904 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1905 struct tcphdr *tcph)
1911 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1913 inc_sequence = ntohl(tcph->seq);
1915 switch (cm_node->state) {
1916 case NES_CM_STATE_SYN_SENT:
1917 case NES_CM_STATE_MPAREQ_SENT:
1918 /* Rcvd syn on active open connection*/
1919 active_open_err(cm_node, skb, 1);
1921 case NES_CM_STATE_LISTENING:
1923 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1924 cm_node->listener->backlog) {
1925 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1928 passive_open_err(cm_node, skb, 0);
1931 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1934 passive_open_err(cm_node, skb, 0);
1938 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1939 BUG_ON(cm_node->send_entry);
1940 cm_node->accept_pend = 1;
1941 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1943 cm_node->state = NES_CM_STATE_SYN_RCVD;
1944 send_syn(cm_node, 1, skb);
1946 case NES_CM_STATE_CLOSED:
1947 cleanup_retrans_entry(cm_node);
1948 add_ref_cm_node(cm_node);
1949 send_reset(cm_node, skb);
1951 case NES_CM_STATE_TSA:
1952 case NES_CM_STATE_ESTABLISHED:
1953 case NES_CM_STATE_FIN_WAIT1:
1954 case NES_CM_STATE_FIN_WAIT2:
1955 case NES_CM_STATE_MPAREQ_RCVD:
1956 case NES_CM_STATE_LAST_ACK:
1957 case NES_CM_STATE_CLOSING:
1958 case NES_CM_STATE_UNKNOWN:
1965 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1966 struct tcphdr *tcph)
1972 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1974 inc_sequence = ntohl(tcph->seq);
1975 switch (cm_node->state) {
1976 case NES_CM_STATE_SYN_SENT:
1977 cleanup_retrans_entry(cm_node);
1979 if (check_syn(cm_node, tcph, skb))
1981 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1983 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1985 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1989 cleanup_retrans_entry(cm_node);
1990 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1991 send_mpa_request(cm_node, skb);
1992 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1994 case NES_CM_STATE_MPAREQ_RCVD:
1995 /* passive open, so should not be here */
1996 passive_open_err(cm_node, skb, 1);
1998 case NES_CM_STATE_LISTENING:
1999 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2000 cleanup_retrans_entry(cm_node);
2001 cm_node->state = NES_CM_STATE_CLOSED;
2002 send_reset(cm_node, skb);
2004 case NES_CM_STATE_CLOSED:
2005 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2006 cleanup_retrans_entry(cm_node);
2007 add_ref_cm_node(cm_node);
2008 send_reset(cm_node, skb);
2010 case NES_CM_STATE_ESTABLISHED:
2011 case NES_CM_STATE_FIN_WAIT1:
2012 case NES_CM_STATE_FIN_WAIT2:
2013 case NES_CM_STATE_LAST_ACK:
2014 case NES_CM_STATE_TSA:
2015 case NES_CM_STATE_CLOSING:
2016 case NES_CM_STATE_UNKNOWN:
2017 case NES_CM_STATE_MPAREQ_SENT:
2024 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2025 struct tcphdr *tcph)
2032 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2034 if (check_seq(cm_node, tcph, skb))
2037 skb_pull(skb, tcph->doff << 2);
2038 inc_sequence = ntohl(tcph->seq);
2039 datasize = skb->len;
2040 switch (cm_node->state) {
2041 case NES_CM_STATE_SYN_RCVD:
2043 cleanup_retrans_entry(cm_node);
2044 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2047 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2048 cm_node->state = NES_CM_STATE_ESTABLISHED;
2050 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2051 handle_rcv_mpa(cm_node, skb);
2052 } else { /* rcvd ACK only */
2053 dev_kfree_skb_any(skb);
2056 case NES_CM_STATE_ESTABLISHED:
2058 cleanup_retrans_entry(cm_node);
2060 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2061 handle_rcv_mpa(cm_node, skb);
2066 case NES_CM_STATE_MPAREQ_SENT:
2067 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2069 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2070 handle_rcv_mpa(cm_node, skb);
2071 } else { /* Could be just an ack pkt.. */
2072 dev_kfree_skb_any(skb);
2075 case NES_CM_STATE_LISTENING:
2076 cleanup_retrans_entry(cm_node);
2077 cm_node->state = NES_CM_STATE_CLOSED;
2078 send_reset(cm_node, skb);
2080 case NES_CM_STATE_CLOSED:
2081 cleanup_retrans_entry(cm_node);
2082 add_ref_cm_node(cm_node);
2083 send_reset(cm_node, skb);
2085 case NES_CM_STATE_LAST_ACK:
2086 case NES_CM_STATE_CLOSING:
2087 cleanup_retrans_entry(cm_node);
2088 cm_node->state = NES_CM_STATE_CLOSED;
2089 cm_node->cm_id->rem_ref(cm_node->cm_id);
2090 rem_ref_cm_node(cm_node->cm_core, cm_node);
2093 case NES_CM_STATE_FIN_WAIT1:
2094 cleanup_retrans_entry(cm_node);
2096 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2098 case NES_CM_STATE_SYN_SENT:
2099 case NES_CM_STATE_FIN_WAIT2:
2100 case NES_CM_STATE_TSA:
2101 case NES_CM_STATE_MPAREQ_RCVD:
2102 case NES_CM_STATE_UNKNOWN:
2104 cleanup_retrans_entry(cm_node);
2113 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2114 struct sk_buff *skb, int optionsize, int passive)
2116 u8 *optionsloc = (u8 *)&tcph[1];
2119 if (process_options(cm_node, optionsloc, optionsize,
2121 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2124 passive_open_err(cm_node, skb, 1);
2126 active_open_err(cm_node, skb, 1);
2131 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2132 cm_node->tcp_cntxt.snd_wscale;
2134 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2135 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2140 * active_open_err() will send reset() if flag set..
2141 * It will also send ABORT event.
2143 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2146 cleanup_retrans_entry(cm_node);
2148 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2149 "state=%d\n", cm_node, cm_node->state);
2150 add_ref_cm_node(cm_node);
2151 send_reset(cm_node, skb);
2153 dev_kfree_skb_any(skb);
2156 cm_node->state = NES_CM_STATE_CLOSED;
2157 create_event(cm_node, NES_CM_EVENT_ABORTED);
2161 * passive_open_err() will either do a reset() or will free up the skb and
2162 * remove the cm_node.
2164 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2167 cleanup_retrans_entry(cm_node);
2168 cm_node->state = NES_CM_STATE_CLOSED;
2170 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2171 "cm_node=%p state =%d\n", cm_node, cm_node->state);
2172 send_reset(cm_node, skb);
2174 dev_kfree_skb_any(skb);
2175 rem_ref_cm_node(cm_node->cm_core, cm_node);
2180 * free_retrans_entry() routines assumes that the retrans_list_lock has
2181 * been acquired before calling.
2183 static void free_retrans_entry(struct nes_cm_node *cm_node)
2185 struct nes_timer_entry *send_entry;
2187 send_entry = cm_node->send_entry;
2189 cm_node->send_entry = NULL;
2190 dev_kfree_skb_any(send_entry->skb);
2192 rem_ref_cm_node(cm_node->cm_core, cm_node);
2196 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2198 unsigned long flags;
2200 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2201 free_retrans_entry(cm_node);
2202 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2207 * Returns skb if to be freed, else it will return NULL if already used..
2209 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2210 struct nes_cm_core *cm_core)
2212 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2213 struct tcphdr *tcph = tcp_hdr(skb);
2217 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2219 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2220 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2221 tcph->ack, tcph->rst, tcph->fin);
2224 pkt_type = NES_PKT_TYPE_RST;
2225 } else if (tcph->syn) {
2226 pkt_type = NES_PKT_TYPE_SYN;
2228 pkt_type = NES_PKT_TYPE_SYNACK;
2229 } else if (tcph->ack) {
2230 pkt_type = NES_PKT_TYPE_ACK;
2236 case NES_PKT_TYPE_SYN:
2237 handle_syn_pkt(cm_node, skb, tcph);
2239 case NES_PKT_TYPE_SYNACK:
2240 handle_synack_pkt(cm_node, skb, tcph);
2242 case NES_PKT_TYPE_ACK:
2243 ret = handle_ack_pkt(cm_node, skb, tcph);
2244 if (fin_set && !ret)
2245 handle_fin_pkt(cm_node);
2247 case NES_PKT_TYPE_RST:
2248 handle_rst_pkt(cm_node, skb, tcph);
2251 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2252 handle_fin_pkt(cm_node);
2259 * mini_cm_listen - create a listen node with params
2261 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2262 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2264 struct nes_cm_listener *listener;
2265 unsigned long flags;
2267 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2268 cm_info->loc_addr, cm_info->loc_port);
2270 /* cannot have multiple matching listeners */
2271 listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2272 NES_CM_LISTENER_EITHER_STATE);
2274 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2275 /* find automatically incs ref count ??? */
2276 atomic_dec(&listener->ref_count);
2277 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2282 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2283 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2287 listener->loc_addr = cm_info->loc_addr;
2288 listener->loc_port = cm_info->loc_port;
2289 listener->reused_node = 0;
2291 atomic_set(&listener->ref_count, 1);
2294 /* find already inc'ed the ref count */
2296 listener->reused_node = 1;
2299 listener->cm_id = cm_info->cm_id;
2300 atomic_set(&listener->pend_accepts_cnt, 0);
2301 listener->cm_core = cm_core;
2302 listener->nesvnic = nesvnic;
2303 atomic_inc(&cm_core->node_cnt);
2305 listener->conn_type = cm_info->conn_type;
2306 listener->backlog = cm_info->backlog;
2307 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2309 if (!listener->reused_node) {
2310 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2311 list_add(&listener->list, &cm_core->listen_list.list);
2312 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2313 atomic_inc(&cm_core->listen_node_cnt);
2316 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2317 " listener = %p, backlog = %d, cm_id = %p.\n",
2318 cm_info->loc_addr, cm_info->loc_port,
2319 listener, listener->backlog, listener->cm_id);
2326 * mini_cm_connect - make a connection node with params
2328 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2329 struct nes_vnic *nesvnic, u16 private_data_len,
2330 void *private_data, struct nes_cm_info *cm_info)
2333 struct nes_cm_node *cm_node;
2334 struct nes_cm_listener *loopbackremotelistener;
2335 struct nes_cm_node *loopbackremotenode;
2336 struct nes_cm_info loopback_cm_info;
2339 /* create a CM connection node */
2340 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2344 /* set our node side to client (active) side */
2345 cm_node->tcp_cntxt.client = 1;
2346 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2348 if (cm_info->loc_addr == cm_info->rem_addr) {
2349 loopbackremotelistener = find_listener(cm_core,
2350 cm_node->loc_addr, cm_node->rem_port,
2351 NES_CM_LISTENER_ACTIVE_STATE);
2352 if (loopbackremotelistener == NULL) {
2353 create_event(cm_node, NES_CM_EVENT_ABORTED);
2355 loopback_cm_info = *cm_info;
2356 loopback_cm_info.loc_port = cm_info->rem_port;
2357 loopback_cm_info.rem_port = cm_info->loc_port;
2358 loopback_cm_info.loc_port =
2360 loopback_cm_info.rem_port =
2362 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2363 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2364 &loopback_cm_info, loopbackremotelistener);
2365 if (!loopbackremotenode) {
2366 rem_ref_cm_node(cm_node->cm_core, cm_node);
2369 atomic_inc(&cm_loopbacks);
2370 loopbackremotenode->loopbackpartner = cm_node;
2371 loopbackremotenode->tcp_cntxt.rcv_wscale =
2372 NES_CM_DEFAULT_RCV_WND_SCALE;
2373 cm_node->loopbackpartner = loopbackremotenode;
2374 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2376 loopbackremotenode->mpa_frame_size = private_data_len;
2378 /* we are done handling this state. */
2379 /* set node to a TSA state */
2380 cm_node->state = NES_CM_STATE_TSA;
2381 cm_node->tcp_cntxt.rcv_nxt =
2382 loopbackremotenode->tcp_cntxt.loc_seq_num;
2383 loopbackremotenode->tcp_cntxt.rcv_nxt =
2384 cm_node->tcp_cntxt.loc_seq_num;
2385 cm_node->tcp_cntxt.max_snd_wnd =
2386 loopbackremotenode->tcp_cntxt.rcv_wnd;
2387 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2388 cm_node->tcp_cntxt.rcv_wnd;
2389 cm_node->tcp_cntxt.snd_wnd =
2390 loopbackremotenode->tcp_cntxt.rcv_wnd;
2391 loopbackremotenode->tcp_cntxt.snd_wnd =
2392 cm_node->tcp_cntxt.rcv_wnd;
2393 cm_node->tcp_cntxt.snd_wscale =
2394 loopbackremotenode->tcp_cntxt.rcv_wscale;
2395 loopbackremotenode->tcp_cntxt.snd_wscale =
2396 cm_node->tcp_cntxt.rcv_wscale;
2397 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2398 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2403 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2404 cm_node->mpa_frame_size = private_data_len;
2406 memcpy(start_buff, private_data, private_data_len);
2408 /* send a syn and goto syn sent state */
2409 cm_node->state = NES_CM_STATE_SYN_SENT;
2410 ret = send_syn(cm_node, 0, NULL);
2413 /* error in sending the syn free up the cm_node struct */
2414 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2415 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2416 cm_node->rem_addr, cm_node->rem_port, cm_node,
2418 rem_ref_cm_node(cm_node->cm_core, cm_node);
2423 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2424 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2425 cm_node->rem_addr, cm_node->rem_port, cm_node,
2434 * mini_cm_accept - accept a connection
2435 * This function is never called
2437 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2444 * mini_cm_reject - reject and teardown a connection
2446 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2451 struct nes_cm_event event;
2452 struct iw_cm_id *cm_id = cm_node->cm_id;
2453 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2455 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2456 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2458 if (cm_node->tcp_cntxt.client)
2460 cleanup_retrans_entry(cm_node);
2463 passive_state = atomic_add_return(1, &cm_node->passive_state);
2464 if (passive_state == NES_SEND_RESET_EVENT) {
2465 cm_node->state = NES_CM_STATE_CLOSED;
2466 rem_ref_cm_node(cm_core, cm_node);
2468 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2469 rem_ref_cm_node(cm_core, cm_node);
2471 ret = send_mpa_reject(cm_node);
2473 cm_node->state = NES_CM_STATE_CLOSED;
2474 err = send_reset(cm_node, NULL);
2478 cm_id->add_ref(cm_id);
2483 cm_node->cm_id = NULL;
2484 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2485 rem_ref_cm_node(cm_core, cm_node);
2486 rem_ref_cm_node(cm_core, loopback);
2488 event.cm_node = loopback;
2489 event.cm_info.rem_addr = loopback->rem_addr;
2490 event.cm_info.loc_addr = loopback->loc_addr;
2491 event.cm_info.rem_port = loopback->rem_port;
2492 event.cm_info.loc_port = loopback->loc_port;
2493 event.cm_info.cm_id = loopback->cm_id;
2494 cm_event_mpa_reject(&event);
2495 rem_ref_cm_node(cm_core, cm_node);
2496 loopback->state = NES_CM_STATE_CLOSING;
2498 cm_id = loopback->cm_id;
2499 rem_ref_cm_node(cm_core, loopback);
2500 cm_id->rem_ref(cm_id);
2511 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2515 if (!cm_core || !cm_node)
2518 switch (cm_node->state) {
2519 case NES_CM_STATE_SYN_RCVD:
2520 case NES_CM_STATE_SYN_SENT:
2521 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2522 case NES_CM_STATE_ESTABLISHED:
2523 case NES_CM_STATE_ACCEPTING:
2524 case NES_CM_STATE_MPAREQ_SENT:
2525 case NES_CM_STATE_MPAREQ_RCVD:
2526 cleanup_retrans_entry(cm_node);
2527 send_reset(cm_node, NULL);
2529 case NES_CM_STATE_CLOSE_WAIT:
2530 cm_node->state = NES_CM_STATE_LAST_ACK;
2531 send_fin(cm_node, NULL);
2533 case NES_CM_STATE_FIN_WAIT1:
2534 case NES_CM_STATE_FIN_WAIT2:
2535 case NES_CM_STATE_LAST_ACK:
2536 case NES_CM_STATE_TIME_WAIT:
2537 case NES_CM_STATE_CLOSING:
2540 case NES_CM_STATE_LISTENING:
2541 cleanup_retrans_entry(cm_node);
2542 send_reset(cm_node, NULL);
2544 case NES_CM_STATE_MPAREJ_RCVD:
2545 case NES_CM_STATE_UNKNOWN:
2546 case NES_CM_STATE_INITED:
2547 case NES_CM_STATE_CLOSED:
2548 case NES_CM_STATE_LISTENER_DESTROYED:
2549 ret = rem_ref_cm_node(cm_core, cm_node);
2551 case NES_CM_STATE_TSA:
2552 if (cm_node->send_entry)
2553 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2554 "send_entry=%p\n", cm_node->send_entry);
2555 ret = rem_ref_cm_node(cm_core, cm_node);
2563 * recv_pkt - recv an ETHERNET packet, and process it through CM
2564 * node state machine
2566 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2567 struct nes_vnic *nesvnic, struct sk_buff *skb)
2569 struct nes_cm_node *cm_node = NULL;
2570 struct nes_cm_listener *listener = NULL;
2572 struct tcphdr *tcph;
2573 struct nes_cm_info nfo;
2574 int skb_handled = 1;
2575 __be32 tmp_daddr, tmp_saddr;
2579 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2582 iph = (struct iphdr *)skb->data;
2583 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2585 nfo.loc_addr = ntohl(iph->daddr);
2586 nfo.loc_port = ntohs(tcph->dest);
2587 nfo.rem_addr = ntohl(iph->saddr);
2588 nfo.rem_port = ntohs(tcph->source);
2590 tmp_daddr = cpu_to_be32(iph->daddr);
2591 tmp_saddr = cpu_to_be32(iph->saddr);
2593 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2594 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2597 cm_node = find_node(cm_core,
2598 nfo.rem_port, nfo.rem_addr,
2599 nfo.loc_port, nfo.loc_addr);
2602 /* Only type of packet accepted are for */
2603 /* the PASSIVE open (syn only) */
2604 if ((!tcph->syn) || (tcph->ack)) {
2608 listener = find_listener(cm_core, nfo.loc_addr,
2610 NES_CM_LISTENER_ACTIVE_STATE);
2614 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2618 nfo.cm_id = listener->cm_id;
2619 nfo.conn_type = listener->conn_type;
2620 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2623 nes_debug(NES_DBG_CM, "Unable to allocate "
2625 cm_packets_dropped++;
2626 atomic_dec(&listener->ref_count);
2627 dev_kfree_skb_any(skb);
2630 if (!tcph->rst && !tcph->fin) {
2631 cm_node->state = NES_CM_STATE_LISTENING;
2633 cm_packets_dropped++;
2634 rem_ref_cm_node(cm_core, cm_node);
2635 dev_kfree_skb_any(skb);
2638 add_ref_cm_node(cm_node);
2639 } else if (cm_node->state == NES_CM_STATE_TSA) {
2640 if (cm_node->nesqp->pau_mode)
2641 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2643 rem_ref_cm_node(cm_core, cm_node);
2644 atomic_inc(&cm_accel_dropped_pkts);
2645 dev_kfree_skb_any(skb);
2649 skb_reset_network_header(skb);
2650 skb_set_transport_header(skb, sizeof(*tcph));
2651 skb->len = ntohs(iph->tot_len);
2652 process_packet(cm_node, skb, cm_core);
2653 rem_ref_cm_node(cm_core, cm_node);
2660 * nes_cm_alloc_core - allocate a top level instance of a cm core
2662 static struct nes_cm_core *nes_cm_alloc_core(void)
2664 struct nes_cm_core *cm_core;
2666 /* setup the CM core */
2667 /* alloc top level core control structure */
2668 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2672 INIT_LIST_HEAD(&cm_core->connected_nodes);
2673 init_timer(&cm_core->tcp_timer);
2674 cm_core->tcp_timer.function = nes_cm_timer_tick;
2676 cm_core->mtu = NES_CM_DEFAULT_MTU;
2677 cm_core->state = NES_CM_STATE_INITED;
2678 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2680 atomic_set(&cm_core->events_posted, 0);
2682 cm_core->api = &nes_cm_api;
2684 spin_lock_init(&cm_core->ht_lock);
2685 spin_lock_init(&cm_core->listen_list_lock);
2687 INIT_LIST_HEAD(&cm_core->listen_list.list);
2689 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2691 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2692 cm_core->event_wq = alloc_ordered_workqueue("nesewq", 0);
2693 if (!cm_core->event_wq)
2694 goto out_free_cmcore;
2695 cm_core->post_event = nes_cm_post_event;
2696 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2697 cm_core->disconn_wq = alloc_ordered_workqueue("nesdwq", 0);
2698 if (!cm_core->disconn_wq)
2701 print_core(cm_core);
2705 destroy_workqueue(cm_core->event_wq);
2713 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2715 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2717 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2724 if (timer_pending(&cm_core->tcp_timer))
2725 del_timer(&cm_core->tcp_timer);
2727 destroy_workqueue(cm_core->event_wq);
2728 destroy_workqueue(cm_core->disconn_wq);
2729 nes_debug(NES_DBG_CM, "\n");
2739 static int mini_cm_get(struct nes_cm_core *cm_core)
2741 return cm_core->state;
2748 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2753 case NES_CM_SET_PKT_SIZE:
2754 cm_core->mtu = value;
2756 case NES_CM_SET_FREE_PKT_Q_SIZE:
2757 cm_core->free_tx_pkt_max = value;
2760 /* unknown set option */
2769 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2770 * successfully exchanged when this is called
2772 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2779 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2780 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2781 NES_QPCONTEXT_MISC_DROS);
2783 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2784 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2786 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2788 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2789 cm_node->tos << NES_QPCONTEXT_MISC2_TOS_SHIFT);
2791 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2793 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2794 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2796 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2797 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2798 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2800 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2801 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2802 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2804 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2805 nesqp->nesqp_context->ts_recent = 0;
2806 nesqp->nesqp_context->ts_age = 0;
2807 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2808 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2809 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2810 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2811 cm_node->tcp_cntxt.rcv_wscale);
2812 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2813 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2814 nesqp->nesqp_context->srtt = 0;
2815 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2816 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2817 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2818 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2819 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2820 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2822 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2823 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2824 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2825 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2826 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2827 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2828 le32_to_cpu(nesqp->nesqp_context->misc));
2829 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2830 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2831 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2833 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2834 cm_node->state = NES_CM_STATE_TSA;
2843 int nes_cm_disconn(struct nes_qp *nesqp)
2845 struct disconn_work *work;
2847 work = kzalloc(sizeof *work, GFP_ATOMIC);
2849 return -ENOMEM; /* Timer will clean up */
2851 nes_add_ref(&nesqp->ibqp);
2852 work->nesqp = nesqp;
2853 INIT_WORK(&work->work, nes_disconnect_worker);
2854 queue_work(g_cm_core->disconn_wq, &work->work);
2860 * nes_disconnect_worker
2862 static void nes_disconnect_worker(struct work_struct *work)
2864 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2865 struct nes_qp *nesqp = dwork->nesqp;
2868 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2869 nesqp->last_aeq, nesqp->hwqp.qp_id);
2870 nes_cm_disconn_true(nesqp);
2871 nes_rem_ref(&nesqp->ibqp);
2876 * nes_cm_disconn_true
2878 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2880 unsigned long flags;
2882 struct iw_cm_id *cm_id;
2883 struct iw_cm_event cm_event;
2884 struct nes_vnic *nesvnic;
2886 u8 original_hw_tcp_state;
2887 u8 original_ibqp_state;
2888 int disconn_status = 0;
2889 int issue_disconn = 0;
2890 int issue_close = 0;
2891 int issue_flush = 0;
2892 u32 flush_q = NES_CQP_FLUSH_RQ;
2893 struct ib_event ibevent;
2896 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2900 spin_lock_irqsave(&nesqp->lock, flags);
2901 cm_id = nesqp->cm_id;
2902 /* make sure we havent already closed this connection */
2904 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2906 spin_unlock_irqrestore(&nesqp->lock, flags);
2910 nesvnic = to_nesvnic(nesqp->ibqp.device);
2911 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2913 original_hw_tcp_state = nesqp->hw_tcp_state;
2914 original_ibqp_state = nesqp->ibqp_state;
2915 last_ae = nesqp->last_aeq;
2917 if (nesqp->term_flags) {
2920 nesqp->cm_id = NULL;
2921 del_timer(&nesqp->terminate_timer);
2922 if (nesqp->flush_issued == 0) {
2923 nesqp->flush_issued = 1;
2926 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2927 ((original_ibqp_state == IB_QPS_RTS) &&
2928 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2930 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2931 disconn_status = -ECONNRESET;
2934 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2935 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2936 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2937 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2939 nesqp->cm_id = NULL;
2940 if (nesqp->flush_issued == 0) {
2941 nesqp->flush_issued = 1;
2946 spin_unlock_irqrestore(&nesqp->lock, flags);
2948 if ((issue_flush) && (nesqp->destroyed == 0)) {
2949 /* Flush the queue(s) */
2950 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2951 flush_q |= NES_CQP_FLUSH_SQ;
2952 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2954 if (nesqp->term_flags) {
2955 ibevent.device = nesqp->ibqp.device;
2956 ibevent.event = nesqp->terminate_eventtype;
2957 ibevent.element.qp = &nesqp->ibqp;
2958 if (nesqp->ibqp.event_handler)
2959 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2963 if ((cm_id) && (cm_id->event_handler)) {
2964 if (issue_disconn) {
2965 atomic_inc(&cm_disconnects);
2966 cm_event.event = IW_CM_EVENT_DISCONNECT;
2967 cm_event.status = disconn_status;
2968 cm_event.local_addr = cm_id->m_local_addr;
2969 cm_event.remote_addr = cm_id->m_remote_addr;
2970 cm_event.private_data = NULL;
2971 cm_event.private_data_len = 0;
2973 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2974 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2975 "cm_id = %p, refcount = %u.\n",
2976 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2977 nesqp->hwqp.sq_tail, cm_id,
2978 atomic_read(&nesqp->refcount));
2980 ret = cm_id->event_handler(cm_id, &cm_event);
2982 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2983 "returned, ret=%d\n", ret);
2987 atomic_inc(&cm_closes);
2988 nes_disconnect(nesqp, 1);
2990 cm_id->provider_data = nesqp;
2991 /* Send up the close complete event */
2992 cm_event.event = IW_CM_EVENT_CLOSE;
2993 cm_event.status = 0;
2994 cm_event.provider_data = cm_id->provider_data;
2995 cm_event.local_addr = cm_id->m_local_addr;
2996 cm_event.remote_addr = cm_id->m_remote_addr;
2997 cm_event.private_data = NULL;
2998 cm_event.private_data_len = 0;
3000 ret = cm_id->event_handler(cm_id, &cm_event);
3002 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3004 cm_id->rem_ref(cm_id);
3015 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3018 struct nes_vnic *nesvnic;
3019 struct nes_device *nesdev;
3020 struct nes_ib_device *nesibdev;
3022 nesvnic = to_nesvnic(nesqp->ibqp.device);
3026 nesdev = nesvnic->nesdev;
3027 nesibdev = nesvnic->nesibdev;
3029 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3030 netdev_refcnt_read(nesvnic->netdev));
3032 if (nesqp->active_conn) {
3034 /* indicate this connection is NOT active */
3035 nesqp->active_conn = 0;
3037 /* Need to free the Last Streaming Mode Message */
3038 if (nesqp->ietf_frame) {
3040 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3041 pci_free_consistent(nesdev->pcidev,
3042 nesqp->private_data_len + nesqp->ietf_frame_size,
3043 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3047 /* close the CM node down if it is still active */
3048 if (nesqp->cm_node) {
3049 nes_debug(NES_DBG_CM, "Call close API\n");
3051 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3061 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3065 struct nes_qp *nesqp;
3066 struct nes_vnic *nesvnic;
3067 struct nes_device *nesdev;
3068 struct nes_cm_node *cm_node;
3069 struct nes_adapter *adapter;
3070 struct ib_qp_attr attr;
3071 struct iw_cm_event cm_event;
3072 struct nes_hw_qp_wqe *wqe;
3073 struct nes_v4_quad nes_quad;
3077 struct nes_ib_device *nesibdev;
3078 struct ib_mr *ibmr = NULL;
3079 struct nes_pd *nespd;
3081 u8 mpa_frame_offset = 0;
3082 struct ietf_mpa_v2 *mpa_v2_frame;
3084 u8 *start_ptr = &start_addr;
3085 u8 **start_buff = &start_ptr;
3087 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3088 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3090 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3094 /* get all our handles */
3095 nesqp = to_nesqp(ibqp);
3096 nesvnic = to_nesvnic(nesqp->ibqp.device);
3097 nesdev = nesvnic->nesdev;
3098 adapter = nesdev->nesadapter;
3100 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3101 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3102 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3103 nesvnic->netdev->name);
3105 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3106 if (cm_node->loopbackpartner)
3107 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3108 rem_ref_cm_node(cm_node->cm_core, cm_node);
3112 passive_state = atomic_add_return(1, &cm_node->passive_state);
3113 if (passive_state == NES_SEND_RESET_EVENT) {
3114 rem_ref_cm_node(cm_node->cm_core, cm_node);
3117 /* associate the node with the QP */
3118 nesqp->cm_node = (void *)cm_node;
3119 cm_node->nesqp = nesqp;
3122 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3123 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3124 atomic_inc(&cm_accepts);
3126 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3127 netdev_refcnt_read(nesvnic->netdev));
3129 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3130 /* allocate the ietf frame and space for private data */
3131 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3132 nesqp->ietf_frame_size + conn_param->private_data_len,
3133 &nesqp->ietf_frame_pbase);
3135 if (!nesqp->ietf_frame) {
3136 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3139 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3141 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3142 mpa_frame_offset = 4;
3144 if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3145 cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3146 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3149 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3150 conn_param->private_data_len);
3152 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3153 nesqp->private_data_len = conn_param->private_data_len;
3155 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3156 wqe = &nesqp->hwqp.sq_vbase[0];
3158 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3159 u64temp = (unsigned long)nesqp;
3160 nesibdev = nesvnic->nesibdev;
3161 nespd = nesqp->nespd;
3162 tagged_offset = (u64)(unsigned long)*start_buff;
3163 ibmr = nes_reg_phys_mr(&nespd->ibpd,
3164 nesqp->ietf_frame_pbase + mpa_frame_offset,
3165 buff_len, IB_ACCESS_LOCAL_WRITE,
3168 nes_debug(NES_DBG_CM, "Unable to register memory region"
3169 "for lSMM for cm_node = %p \n",
3171 pci_free_consistent(nesdev->pcidev,
3172 nesqp->private_data_len + nesqp->ietf_frame_size,
3173 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3174 return PTR_ERR(ibmr);
3177 ibmr->pd = &nespd->ibpd;
3178 ibmr->device = nespd->ibpd.device;
3179 nesqp->lsmm_mr = ibmr;
3181 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3182 set_wqe_64bit_value(wqe->wqe_words,
3183 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3185 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3186 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3187 NES_IWARP_SQ_WQE_WRPDU);
3188 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3189 cpu_to_le32(buff_len);
3190 set_wqe_64bit_value(wqe->wqe_words,
3191 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3192 (u64)(unsigned long)(*start_buff));
3193 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3194 cpu_to_le32(buff_len);
3195 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3196 if (nesqp->sq_kmapped) {
3197 nesqp->sq_kmapped = 0;
3198 kunmap(nesqp->page);
3201 nesqp->nesqp_context->ird_ord_sizes |=
3202 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3203 NES_QPCONTEXT_ORDIRD_WRPDU);
3205 nesqp->nesqp_context->ird_ord_sizes |=
3206 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3208 nesqp->skip_lsmm = 1;
3210 /* Cache the cm_id in the qp */
3211 nesqp->cm_id = cm_id;
3212 cm_node->cm_id = cm_id;
3214 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3215 cm_id->provider_data = nesqp;
3216 nesqp->active_conn = 0;
3218 if (cm_node->state == NES_CM_STATE_TSA)
3219 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3222 nes_cm_init_tsa_conn(nesqp, cm_node);
3224 nesqp->nesqp_context->tcpPorts[0] =
3225 cpu_to_le16(cm_node->loc_port);
3226 nesqp->nesqp_context->tcpPorts[1] =
3227 cpu_to_le16(cm_node->rem_port);
3229 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->rem_addr);
3231 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3232 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3233 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3235 nesqp->nesqp_context->arp_index_vlan |=
3236 cpu_to_le32(nes_arp_table(nesdev,
3237 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3238 NES_ARP_RESOLVE) << 16);
3240 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3241 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3243 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3245 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3246 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3247 nesqp->nesqp_context->ird_ord_sizes |=
3248 cpu_to_le32((u32)cm_node->ord_size);
3250 memset(&nes_quad, 0, sizeof(nes_quad));
3251 nes_quad.DstIpAdrIndex =
3252 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3253 nes_quad.SrcIpadr = htonl(cm_node->rem_addr);
3254 nes_quad.TcpPorts[0] = htons(cm_node->rem_port);
3255 nes_quad.TcpPorts[1] = htons(cm_node->loc_port);
3257 /* Produce hash key */
3258 crc_value = get_crc_value(&nes_quad);
3259 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3260 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3261 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3263 nesqp->hte_index &= adapter->hte_index_mask;
3264 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3266 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3268 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3269 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3270 "private data length=%u.\n", nesqp->hwqp.qp_id,
3271 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3272 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3273 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3274 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3277 /* notify OF layer that accept event was successful */
3278 cm_id->add_ref(cm_id);
3279 nes_add_ref(&nesqp->ibqp);
3281 cm_event.event = IW_CM_EVENT_ESTABLISHED;
3282 cm_event.status = 0;
3283 cm_event.provider_data = (void *)nesqp;
3284 cm_event.local_addr = cm_id->m_local_addr;
3285 cm_event.remote_addr = cm_id->m_remote_addr;
3286 cm_event.private_data = NULL;
3287 cm_event.private_data_len = 0;
3288 cm_event.ird = cm_node->ird_size;
3289 cm_event.ord = cm_node->ord_size;
3291 ret = cm_id->event_handler(cm_id, &cm_event);
3292 attr.qp_state = IB_QPS_RTS;
3293 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3294 if (cm_node->loopbackpartner) {
3295 cm_node->loopbackpartner->mpa_frame_size =
3296 nesqp->private_data_len;
3297 /* copy entire MPA frame to our cm_node's frame */
3298 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3299 conn_param->private_data, conn_param->private_data_len);
3300 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3303 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3304 "ret=%d\n", __func__, __LINE__, ret);
3313 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3315 struct nes_cm_node *cm_node;
3316 struct nes_cm_node *loopback;
3317 struct nes_cm_core *cm_core;
3320 atomic_inc(&cm_rejects);
3321 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3322 loopback = cm_node->loopbackpartner;
3323 cm_core = cm_node->cm_core;
3324 cm_node->cm_id = cm_id;
3326 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3330 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3331 loopback->mpa_frame.priv_data_len = pdata_len;
3332 loopback->mpa_frame_size = pdata_len;
3334 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3335 cm_node->mpa_frame_size = pdata_len;
3336 memcpy(start_buff, pdata, pdata_len);
3338 return cm_core->api->reject(cm_core, cm_node);
3344 * setup and launch cm connect node
3346 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3349 struct nes_qp *nesqp;
3350 struct nes_vnic *nesvnic;
3351 struct nes_device *nesdev;
3352 struct nes_cm_node *cm_node;
3353 struct nes_cm_info cm_info;
3355 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3356 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3358 if (cm_id->remote_addr.ss_family != AF_INET)
3360 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3363 nesqp = to_nesqp(ibqp);
3366 nesvnic = to_nesvnic(nesqp->ibqp.device);
3369 nesdev = nesvnic->nesdev;
3373 if (!laddr->sin_port || !raddr->sin_port)
3376 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3377 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3378 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3379 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3380 ntohs(laddr->sin_port));
3382 atomic_inc(&cm_connects);
3383 nesqp->active_conn = 1;
3385 /* cache the cm_id in the qp */
3386 nesqp->cm_id = cm_id;
3387 cm_id->provider_data = nesqp;
3388 nesqp->private_data_len = conn_param->private_data_len;
3390 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3391 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3392 conn_param->private_data_len);
3394 /* set up the connection params for the node */
3395 cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3396 cm_info.loc_port = ntohs(laddr->sin_port);
3397 cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3398 cm_info.rem_port = ntohs(raddr->sin_port);
3399 cm_info.cm_id = cm_id;
3400 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3402 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3403 nes_manage_apbvt(nesvnic, cm_info.loc_port,
3404 PCI_FUNC(nesdev->pcidev->devfn),
3405 NES_MANAGE_APBVT_ADD);
3409 cm_id->add_ref(cm_id);
3411 /* create a connect CM node connection */
3412 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3413 conn_param->private_data_len, (void *)conn_param->private_data,
3417 nes_manage_apbvt(nesvnic, cm_info.loc_port,
3418 PCI_FUNC(nesdev->pcidev->devfn),
3419 NES_MANAGE_APBVT_DEL);
3421 nes_debug(NES_DBG_NLMSG, "Delete loc_port = %04X\n",
3423 cm_id->rem_ref(cm_id);
3427 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3428 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3429 cm_node->ord_size == 0)
3430 cm_node->ord_size = 1;
3432 cm_node->apbvt_set = apbvt_set;
3433 cm_node->tos = cm_id->tos;
3434 nesqp->cm_node = cm_node;
3435 cm_node->nesqp = nesqp;
3436 nes_add_ref(&nesqp->ibqp);
3445 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3447 struct nes_vnic *nesvnic;
3448 struct nes_cm_listener *cm_node;
3449 struct nes_cm_info cm_info;
3451 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3453 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3454 cm_id, ntohs(laddr->sin_port));
3456 if (cm_id->m_local_addr.ss_family != AF_INET)
3458 nesvnic = to_nesvnic(cm_id->device);
3462 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3463 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3465 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3466 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3468 /* setup listen params in our api call struct */
3469 cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3470 cm_info.loc_port = ntohs(laddr->sin_port);
3471 cm_info.backlog = backlog;
3472 cm_info.cm_id = cm_id;
3474 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3476 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3478 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3479 __func__, __LINE__);
3483 cm_id->provider_data = cm_node;
3484 cm_node->tos = cm_id->tos;
3486 if (!cm_node->reused_node) {
3487 err = nes_manage_apbvt(nesvnic, cm_node->loc_port,
3488 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3489 NES_MANAGE_APBVT_ADD);
3491 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3493 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3496 atomic_inc(&cm_listens_created);
3499 cm_id->add_ref(cm_id);
3500 cm_id->provider_data = (void *)cm_node;
3508 * nes_destroy_listen
3510 int nes_destroy_listen(struct iw_cm_id *cm_id)
3512 if (cm_id->provider_data)
3513 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3515 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3517 cm_id->rem_ref(cm_id);
3526 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3530 cm_packets_received++;
3531 if ((g_cm_core) && (g_cm_core->api))
3532 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3534 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3535 " cm is not setup properly.\n");
3543 * Start and init a cm core module
3545 int nes_cm_start(void)
3547 nes_debug(NES_DBG_CM, "\n");
3548 /* create the primary CM core, pass this handle to subsequent core inits */
3549 g_cm_core = nes_cm_alloc_core();
3559 * stop and dealloc all cm core instances
3561 int nes_cm_stop(void)
3563 g_cm_core->api->destroy_cm_core(g_cm_core);
3569 * cm_event_connected
3570 * handle a connected event, setup QPs and HW
3572 static void cm_event_connected(struct nes_cm_event *event)
3574 struct nes_qp *nesqp;
3575 struct nes_vnic *nesvnic;
3576 struct nes_device *nesdev;
3577 struct nes_cm_node *cm_node;
3578 struct nes_adapter *nesadapter;
3579 struct ib_qp_attr attr;
3580 struct iw_cm_id *cm_id;
3581 struct iw_cm_event cm_event;
3582 struct nes_v4_quad nes_quad;
3585 struct sockaddr_in *laddr;
3586 struct sockaddr_in *raddr;
3587 struct sockaddr_in *cm_event_laddr;
3589 /* get all our handles */
3590 cm_node = event->cm_node;
3591 cm_id = cm_node->cm_id;
3592 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3593 nesqp = (struct nes_qp *)cm_id->provider_data;
3594 nesvnic = to_nesvnic(nesqp->ibqp.device);
3595 nesdev = nesvnic->nesdev;
3596 nesadapter = nesdev->nesadapter;
3597 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3598 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3599 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3601 if (nesqp->destroyed)
3603 atomic_inc(&cm_connecteds);
3604 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3605 " local port 0x%04X. jiffies = %lu.\n",
3606 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3607 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3609 nes_cm_init_tsa_conn(nesqp, cm_node);
3611 /* set the QP tsa context */
3612 nesqp->nesqp_context->tcpPorts[0] =
3613 cpu_to_le16(cm_node->loc_port);
3614 nesqp->nesqp_context->tcpPorts[1] =
3615 cpu_to_le16(cm_node->rem_port);
3616 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->rem_addr);
3618 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3619 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3620 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3621 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3622 nes_arp_table(nesdev,
3623 le32_to_cpu(nesqp->nesqp_context->ip0),
3624 NULL, NES_ARP_RESOLVE) << 16);
3625 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3626 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3627 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3628 nesqp->nesqp_context->ird_ord_sizes |=
3629 cpu_to_le32((u32)1 <<
3630 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3631 nesqp->nesqp_context->ird_ord_sizes |=
3632 cpu_to_le32((u32)cm_node->ord_size);
3634 /* Adjust tail for not having a LSMM */
3635 /*nesqp->hwqp.sq_tail = 1;*/
3637 build_rdma0_msg(cm_node, &nesqp);
3639 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3640 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3642 memset(&nes_quad, 0, sizeof(nes_quad));
3644 nes_quad.DstIpAdrIndex =
3645 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3646 nes_quad.SrcIpadr = htonl(cm_node->rem_addr);
3647 nes_quad.TcpPorts[0] = htons(cm_node->rem_port);
3648 nes_quad.TcpPorts[1] = htons(cm_node->loc_port);
3650 /* Produce hash key */
3651 crc_value = get_crc_value(&nes_quad);
3652 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3653 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3654 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3656 nesqp->hte_index &= nesadapter->hte_index_mask;
3657 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3659 nesqp->ietf_frame = &cm_node->mpa_frame;
3660 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3661 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3663 /* notify OF layer we successfully created the requested connection */
3664 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3665 cm_event.status = 0;
3666 cm_event.provider_data = cm_id->provider_data;
3667 cm_event_laddr->sin_family = AF_INET;
3668 cm_event_laddr->sin_port = laddr->sin_port;
3669 cm_event.remote_addr = cm_id->m_remote_addr;
3671 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3672 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3673 cm_event.ird = cm_node->ird_size;
3674 cm_event.ord = cm_node->ord_size;
3676 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3677 ret = cm_id->event_handler(cm_id, &cm_event);
3678 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3681 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3682 "ret=%d\n", __func__, __LINE__, ret);
3683 attr.qp_state = IB_QPS_RTS;
3684 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3686 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3687 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3694 * cm_event_connect_error
3696 static void cm_event_connect_error(struct nes_cm_event *event)
3698 struct nes_qp *nesqp;
3699 struct iw_cm_id *cm_id;
3700 struct iw_cm_event cm_event;
3701 /* struct nes_cm_info cm_info; */
3704 if (!event->cm_node)
3707 cm_id = event->cm_node->cm_id;
3711 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3712 nesqp = cm_id->provider_data;
3717 /* notify OF layer about this connection error event */
3718 /* cm_id->rem_ref(cm_id); */
3719 nesqp->cm_id = NULL;
3720 cm_id->provider_data = NULL;
3721 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3722 cm_event.status = -ECONNRESET;
3723 cm_event.provider_data = cm_id->provider_data;
3724 cm_event.local_addr = cm_id->m_local_addr;
3725 cm_event.remote_addr = cm_id->m_remote_addr;
3726 cm_event.private_data = NULL;
3727 cm_event.private_data_len = 0;
3729 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3731 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3732 &cm_event.local_addr;
3733 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3734 &cm_event.remote_addr;
3735 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3736 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3740 ret = cm_id->event_handler(cm_id, &cm_event);
3741 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3743 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3744 "ret=%d\n", __func__, __LINE__, ret);
3745 cm_id->rem_ref(cm_id);
3747 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3755 static void cm_event_reset(struct nes_cm_event *event)
3757 struct nes_qp *nesqp;
3758 struct iw_cm_id *cm_id;
3759 struct iw_cm_event cm_event;
3760 /* struct nes_cm_info cm_info; */
3763 if (!event->cm_node)
3766 if (!event->cm_node->cm_id)
3769 cm_id = event->cm_node->cm_id;
3771 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3772 nesqp = cm_id->provider_data;
3776 nesqp->cm_id = NULL;
3777 /* cm_id->provider_data = NULL; */
3778 cm_event.event = IW_CM_EVENT_DISCONNECT;
3779 cm_event.status = -ECONNRESET;
3780 cm_event.provider_data = cm_id->provider_data;
3781 cm_event.local_addr = cm_id->m_local_addr;
3782 cm_event.remote_addr = cm_id->m_remote_addr;
3783 cm_event.private_data = NULL;
3784 cm_event.private_data_len = 0;
3786 cm_id->add_ref(cm_id);
3787 ret = cm_id->event_handler(cm_id, &cm_event);
3788 atomic_inc(&cm_closes);
3789 cm_event.event = IW_CM_EVENT_CLOSE;
3790 cm_event.status = 0;
3791 cm_event.provider_data = cm_id->provider_data;
3792 cm_event.local_addr = cm_id->m_local_addr;
3793 cm_event.remote_addr = cm_id->m_remote_addr;
3794 cm_event.private_data = NULL;
3795 cm_event.private_data_len = 0;
3796 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3797 ret = cm_id->event_handler(cm_id, &cm_event);
3799 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3802 /* notify OF layer about this connection error event */
3803 cm_id->rem_ref(cm_id);
3812 static void cm_event_mpa_req(struct nes_cm_event *event)
3814 struct iw_cm_id *cm_id;
3815 struct iw_cm_event cm_event;
3817 struct nes_cm_node *cm_node;
3818 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3819 &cm_event.local_addr;
3820 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3821 &cm_event.remote_addr;
3823 cm_node = event->cm_node;
3826 cm_id = cm_node->cm_id;
3828 atomic_inc(&cm_connect_reqs);
3829 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3830 cm_node, cm_id, jiffies);
3832 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3833 cm_event.status = 0;
3834 cm_event.provider_data = (void *)cm_node;
3836 cm_event_laddr->sin_family = AF_INET;
3837 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3838 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3840 cm_event_raddr->sin_family = AF_INET;
3841 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3842 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3843 cm_event.private_data = cm_node->mpa_frame_buf;
3844 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3845 if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
3846 cm_event.ird = NES_MAX_IRD;
3847 cm_event.ord = NES_MAX_ORD;
3849 cm_event.ird = cm_node->ird_size;
3850 cm_event.ord = cm_node->ord_size;
3853 ret = cm_id->event_handler(cm_id, &cm_event);
3855 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3856 __func__, __LINE__, ret);
3861 static void cm_event_mpa_reject(struct nes_cm_event *event)
3863 struct iw_cm_id *cm_id;
3864 struct iw_cm_event cm_event;
3865 struct nes_cm_node *cm_node;
3867 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3868 &cm_event.local_addr;
3869 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3870 &cm_event.remote_addr;
3872 cm_node = event->cm_node;
3875 cm_id = cm_node->cm_id;
3877 atomic_inc(&cm_connect_reqs);
3878 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3879 cm_node, cm_id, jiffies);
3881 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3882 cm_event.status = -ECONNREFUSED;
3883 cm_event.provider_data = cm_id->provider_data;
3885 cm_event_laddr->sin_family = AF_INET;
3886 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3887 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3889 cm_event_raddr->sin_family = AF_INET;
3890 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3891 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3893 cm_event.private_data = cm_node->mpa_frame_buf;
3894 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3896 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3897 "remove_addr=%08x\n",
3898 cm_event_laddr->sin_addr.s_addr,
3899 cm_event_raddr->sin_addr.s_addr);
3901 ret = cm_id->event_handler(cm_id, &cm_event);
3903 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3904 __func__, __LINE__, ret);
3910 static void nes_cm_event_handler(struct work_struct *);
3914 * post an event to the cm event handler
3916 static int nes_cm_post_event(struct nes_cm_event *event)
3918 atomic_inc(&event->cm_node->cm_core->events_posted);
3919 add_ref_cm_node(event->cm_node);
3920 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3921 INIT_WORK(&event->event_work, nes_cm_event_handler);
3922 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3923 event->cm_node, event);
3925 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3927 nes_debug(NES_DBG_CM, "Exit\n");
3933 * nes_cm_event_handler
3934 * worker function to handle cm events
3935 * will free instance of nes_cm_event
3937 static void nes_cm_event_handler(struct work_struct *work)
3939 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3941 struct nes_cm_core *cm_core;
3943 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3946 cm_core = event->cm_node->cm_core;
3947 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3948 event, event->type, atomic_read(&cm_core->events_posted));
3950 switch (event->type) {
3951 case NES_CM_EVENT_MPA_REQ:
3952 cm_event_mpa_req(event);
3953 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3956 case NES_CM_EVENT_RESET:
3957 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3959 cm_event_reset(event);
3961 case NES_CM_EVENT_CONNECTED:
3962 if ((!event->cm_node->cm_id) ||
3963 (event->cm_node->state != NES_CM_STATE_TSA))
3965 cm_event_connected(event);
3966 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3968 case NES_CM_EVENT_MPA_REJECT:
3969 if ((!event->cm_node->cm_id) ||
3970 (event->cm_node->state == NES_CM_STATE_TSA))
3972 cm_event_mpa_reject(event);
3973 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3976 case NES_CM_EVENT_ABORTED:
3977 if ((!event->cm_node->cm_id) ||
3978 (event->cm_node->state == NES_CM_STATE_TSA))
3980 cm_event_connect_error(event);
3981 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3983 case NES_CM_EVENT_DROPPED_PKT:
3984 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3987 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3991 atomic_dec(&cm_core->events_posted);
3992 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3993 rem_ref_cm_node(cm_core, event->cm_node);