2 * Copyright (c) 2006 - 2009 Intel Corporation. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #define TCPOPT_TIMESTAMP 8
37 #include <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>
66 u32 cm_packets_bounced;
67 u32 cm_packets_dropped;
68 u32 cm_packets_retrans;
69 u32 cm_packets_created;
70 u32 cm_packets_received;
71 atomic_t cm_listens_created;
72 atomic_t cm_listens_destroyed;
74 atomic_t cm_loopbacks;
75 atomic_t cm_nodes_created;
76 atomic_t cm_nodes_destroyed;
77 atomic_t cm_accel_dropped_pkts;
78 atomic_t cm_resets_recvd;
80 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
81 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *);
82 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
83 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, struct nes_vnic *, u16, void *, struct nes_cm_info *);
84 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
85 static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *);
86 static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
87 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
88 static int mini_cm_dealloc_core(struct nes_cm_core *);
89 static int mini_cm_get(struct nes_cm_core *);
90 static int mini_cm_set(struct nes_cm_core *, u32, u32);
92 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
93 static int add_ref_cm_node(struct nes_cm_node *);
94 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
96 static int nes_cm_disconn_true(struct nes_qp *);
97 static int nes_cm_post_event(struct nes_cm_event *event);
98 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
99 static void nes_disconnect_worker(struct work_struct *work);
101 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
102 static int send_mpa_reject(struct nes_cm_node *);
103 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
104 static int send_reset(struct nes_cm_node *, struct sk_buff *);
105 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
106 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
107 static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
109 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
110 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
111 static void cleanup_retrans_entry(struct nes_cm_node *);
112 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
113 static void free_retrans_entry(struct nes_cm_node *cm_node);
114 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
116 /* CM event handler functions */
117 static void cm_event_connected(struct nes_cm_event *);
118 static void cm_event_connect_error(struct nes_cm_event *);
119 static void cm_event_reset(struct nes_cm_event *);
120 static void cm_event_mpa_req(struct nes_cm_event *);
121 static void cm_event_mpa_reject(struct nes_cm_event *);
122 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
124 /* MPA build functions */
125 static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
126 static void build_mpa_v2(struct nes_cm_node *, void *, u8);
127 static void build_mpa_v1(struct nes_cm_node *, void *, u8);
128 static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
130 static void print_core(struct nes_cm_core *core);
132 /* External CM API Interface */
133 /* instance of function pointers for client API */
134 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
135 static struct nes_cm_ops nes_cm_api = {
144 mini_cm_dealloc_core,
149 static struct nes_cm_core *g_cm_core;
151 atomic_t cm_connects;
153 atomic_t cm_disconnects;
155 atomic_t cm_connecteds;
156 atomic_t cm_connect_reqs;
159 int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
161 return add_ref_cm_node(cm_node);
164 int nes_rem_ref_cm_node(struct nes_cm_node *cm_node)
166 return rem_ref_cm_node(cm_node->cm_core, cm_node);
172 static struct nes_cm_event *create_event(struct nes_cm_node * cm_node,
173 enum nes_cm_event_type type)
175 struct nes_cm_event *event;
180 /* allocate an empty event */
181 event = kzalloc(sizeof(*event), GFP_ATOMIC);
187 event->cm_node = cm_node;
188 event->cm_info.rem_addr = cm_node->rem_addr;
189 event->cm_info.loc_addr = cm_node->loc_addr;
190 event->cm_info.rem_port = cm_node->rem_port;
191 event->cm_info.loc_port = cm_node->loc_port;
192 event->cm_info.cm_id = cm_node->cm_id;
194 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
195 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
196 cm_node, event, type, event->cm_info.loc_addr,
197 event->cm_info.loc_port, event->cm_info.rem_addr,
198 event->cm_info.rem_port);
200 nes_cm_post_event(event);
208 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
211 u8 *start_ptr = &start_addr;
212 u8 **start_buff = &start_ptr;
216 nes_debug(NES_DBG_CM, "skb set to NULL\n");
220 /* send an MPA Request frame */
221 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REQUEST);
222 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK);
224 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
229 static int send_mpa_reject(struct nes_cm_node *cm_node)
231 struct sk_buff *skb = NULL;
233 u8 *start_ptr = &start_addr;
234 u8 **start_buff = &start_ptr;
237 skb = dev_alloc_skb(MAX_CM_BUFFER);
239 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
243 /* send an MPA reject frame */
244 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY);
245 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN);
247 cm_node->state = NES_CM_STATE_FIN_WAIT1;
248 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
253 * recv_mpa - process a received TCP pkt, we are expecting an
256 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
259 struct ietf_mpa_v1 *mpa_frame;
260 struct ietf_mpa_v2 *mpa_v2_frame;
261 struct ietf_rtr_msg *rtr_msg;
265 *type = NES_MPA_REQUEST_ACCEPT;
267 /* assume req frame is in tcp data payload */
268 if (len < sizeof(struct ietf_mpa_v1)) {
269 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
273 /* points to the beginning of the frame, which could be MPA V1 or V2 */
274 mpa_frame = (struct ietf_mpa_v1 *)buffer;
275 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
276 priv_data_len = ntohs(mpa_frame->priv_data_len);
278 /* make sure mpa private data len is less than 512 bytes */
279 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
280 nes_debug(NES_DBG_CM, "The received Length of Private"
281 " Data field exceeds 512 octets\n");
285 * make sure MPA receiver interoperate with the
286 * received MPA version and MPA key information
289 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
290 nes_debug(NES_DBG_CM, "The received mpa version"
291 " is not supported\n");
295 * backwards compatibility only
297 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
298 nes_debug(NES_DBG_CM, "The received mpa version"
299 " can not be interoperated\n");
302 cm_node->mpa_frame_rev = mpa_frame->rev;
305 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
306 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
307 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
311 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
312 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
318 if (priv_data_len + mpa_hdr_len != len) {
319 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
320 " complete (%x + %x != %x)\n",
321 priv_data_len, mpa_hdr_len, len);
324 /* make sure it does not exceed the max size */
325 if (len > MAX_CM_BUFFER) {
326 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
327 " (%x + %x != %x)\n",
328 priv_data_len, mpa_hdr_len, len);
332 cm_node->mpa_frame_size = priv_data_len;
334 switch (mpa_frame->rev) {
338 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
339 mpa_hdr_len += IETF_RTR_MSG_SIZE;
340 cm_node->mpa_frame_size -= IETF_RTR_MSG_SIZE;
341 rtr_msg = &mpa_v2_frame->rtr_msg;
343 /* parse rtr message */
344 rtr_msg->ctrl_ird = ntohs(rtr_msg->ctrl_ird);
345 rtr_msg->ctrl_ord = ntohs(rtr_msg->ctrl_ord);
346 ird_size = rtr_msg->ctrl_ird & IETF_NO_IRD_ORD;
347 ord_size = rtr_msg->ctrl_ord & IETF_NO_IRD_ORD;
349 if (!(rtr_msg->ctrl_ird & IETF_PEER_TO_PEER)) {
354 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
356 if (cm_node->ord_size > ird_size)
357 cm_node->ord_size = ird_size;
360 if (cm_node->ord_size > ird_size)
361 cm_node->ord_size = ird_size;
363 if (cm_node->ird_size < ord_size) {
364 /* no resources available */
365 /* send terminate message */
370 if (rtr_msg->ctrl_ord & IETF_RDMA0_READ) {
371 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
372 } else if (rtr_msg->ctrl_ord & IETF_RDMA0_WRITE) {
373 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
374 } else { /* Not supported RDMA0 operation */
384 /* copy entire MPA frame to our cm_node's frame */
385 memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size);
387 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
388 *type = NES_MPA_REQUEST_REJECT;
394 * form_cm_frame - get a free packet and build empty frame Use
395 * node info to build.
397 static void form_cm_frame(struct sk_buff *skb,
398 struct nes_cm_node *cm_node, void *options, u32 optionsize,
399 void *data, u32 datasize, u8 flags)
405 u16 packetsize = sizeof(*iph);
407 packetsize += sizeof(*tcph);
408 packetsize += optionsize + datasize;
411 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
413 buf = skb_put(skb, packetsize + ETH_HLEN);
415 ethh = (struct ethhdr *)buf;
418 iph = (struct iphdr *)buf;
420 tcph = (struct tcphdr *)buf;
421 skb_reset_mac_header(skb);
422 skb_set_network_header(skb, ETH_HLEN);
423 skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph));
424 buf += sizeof(*tcph);
426 skb->ip_summed = CHECKSUM_PARTIAL;
427 skb->protocol = htons(0x800);
429 skb->mac_len = ETH_HLEN;
431 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
432 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
433 ethh->h_proto = htons(0x0800);
435 iph->version = IPVERSION;
436 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
438 iph->tot_len = htons(packetsize);
439 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
441 iph->frag_off = htons(0x4000);
443 iph->protocol = 0x06; /* IPPROTO_TCP */
445 iph->saddr = htonl(cm_node->loc_addr);
446 iph->daddr = htonl(cm_node->rem_addr);
448 tcph->source = htons(cm_node->loc_port);
449 tcph->dest = htons(cm_node->rem_port);
450 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
452 if (flags & SET_ACK) {
453 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
454 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
460 if (flags & SET_SYN) {
461 cm_node->tcp_cntxt.loc_seq_num++;
464 cm_node->tcp_cntxt.loc_seq_num += datasize;
467 if (flags & SET_FIN) {
468 cm_node->tcp_cntxt.loc_seq_num++;
475 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
476 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
479 memcpy(buf, options, optionsize);
482 memcpy(buf, data, datasize);
484 skb_shinfo(skb)->nr_frags = 0;
485 cm_packets_created++;
489 * print_core - dump a cm core
491 static void print_core(struct nes_cm_core *core)
493 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
494 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
497 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
499 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
501 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
502 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
504 nes_debug(NES_DBG_CM, "core : %p \n", core);
506 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
510 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
512 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
513 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
517 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
519 switch (cm_node->mpa_frame_rev) {
521 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
522 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
523 build_mpa_v1(cm_node, *start_buff, mpa_key);
526 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
527 build_mpa_v2(cm_node, *start_buff, mpa_key);
536 * build_mpa_v2 - build a MPA V2 frame
538 static void build_mpa_v2(struct nes_cm_node *cm_node,
539 void *start_addr, u8 mpa_key)
541 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
542 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
544 /* initialize the upper 5 bytes of the frame */
545 build_mpa_v1(cm_node, start_addr, mpa_key);
546 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
547 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
549 /* initialize RTR msg */
550 rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
551 IETF_NO_IRD_ORD : cm_node->ird_size;
552 rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
553 IETF_NO_IRD_ORD : cm_node->ord_size;
555 rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER;
556 rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN;
559 case MPA_KEY_REQUEST:
560 rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
561 rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
564 switch (cm_node->send_rdma0_op) {
565 case SEND_RDMA_WRITE_ZERO:
566 rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
568 case SEND_RDMA_READ_ZERO:
569 rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
573 rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird);
574 rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord);
578 * build_mpa_v1 - build a MPA V1 frame
580 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
582 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
585 case MPA_KEY_REQUEST:
586 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
589 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
592 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
593 mpa_frame->rev = cm_node->mpa_frame_rev;
594 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
597 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
600 struct nes_qp *nesqp = *nesqp_addr;
601 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
603 u64temp = (unsigned long)nesqp;
604 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
605 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
607 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
608 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
610 switch (cm_node->send_rdma0_op) {
611 case SEND_RDMA_WRITE_ZERO:
612 nes_debug(NES_DBG_CM, "Sending first write.\n");
613 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
614 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
615 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
616 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
617 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
620 case SEND_RDMA_READ_ZERO:
622 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO) {
623 printk(KERN_ERR "%s[%u]: Unsupported RDMA0 len operation=%u\n",
624 __func__, __LINE__, cm_node->send_rdma0_op);
627 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
628 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
629 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
630 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
631 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
632 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
633 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
634 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
638 if (nesqp->sq_kmapped) {
639 nesqp->sq_kmapped = 0;
643 /*use the reserved spot on the WQ for the extra first WQE*/
644 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
645 NES_QPCONTEXT_ORDIRD_WRPDU |
646 NES_QPCONTEXT_ORDIRD_ALSMM));
647 nesqp->skip_lsmm = 1;
648 nesqp->hwqp.sq_tail = 0;
653 * note - cm_node needs to be protected before calling this. Encase in:
654 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
656 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
657 enum nes_timer_type type, int send_retrans,
658 int close_when_complete)
661 struct nes_cm_core *cm_core = cm_node->cm_core;
662 struct nes_timer_entry *new_send;
666 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
670 /* new_send->timetosend = currenttime */
671 new_send->retrycount = NES_DEFAULT_RETRYS;
672 new_send->retranscount = NES_DEFAULT_RETRANS;
674 new_send->timetosend = jiffies;
675 new_send->type = type;
676 new_send->netdev = cm_node->netdev;
677 new_send->send_retrans = send_retrans;
678 new_send->close_when_complete = close_when_complete;
680 if (type == NES_TIMER_TYPE_CLOSE) {
681 new_send->timetosend += (HZ / 10);
682 if (cm_node->recv_entry) {
687 cm_node->recv_entry = new_send;
690 if (type == NES_TIMER_TYPE_SEND) {
691 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
692 atomic_inc(&new_send->skb->users);
693 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
694 cm_node->send_entry = new_send;
695 add_ref_cm_node(cm_node);
696 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
697 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
699 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
700 if (ret != NETDEV_TX_OK) {
701 nes_debug(NES_DBG_CM, "Error sending packet %p "
702 "(jiffies = %lu)\n", new_send, jiffies);
703 new_send->timetosend = jiffies;
708 cleanup_retrans_entry(cm_node);
709 if (close_when_complete)
710 rem_ref_cm_node(cm_core, cm_node);
716 was_timer_set = timer_pending(&cm_core->tcp_timer);
718 if (!was_timer_set) {
719 cm_core->tcp_timer.expires = new_send->timetosend;
720 add_timer(&cm_core->tcp_timer);
726 static void nes_retrans_expired(struct nes_cm_node *cm_node)
728 struct iw_cm_id *cm_id = cm_node->cm_id;
729 enum nes_cm_node_state state = cm_node->state;
730 cm_node->state = NES_CM_STATE_CLOSED;
733 case NES_CM_STATE_SYN_RCVD:
734 case NES_CM_STATE_CLOSING:
735 rem_ref_cm_node(cm_node->cm_core, cm_node);
737 case NES_CM_STATE_LAST_ACK:
738 case NES_CM_STATE_FIN_WAIT1:
740 cm_id->rem_ref(cm_id);
741 send_reset(cm_node, NULL);
744 add_ref_cm_node(cm_node);
745 send_reset(cm_node, NULL);
746 create_event(cm_node, NES_CM_EVENT_ABORTED);
750 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
752 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
753 struct iw_cm_id *cm_id = cm_node->cm_id;
754 struct nes_qp *nesqp;
755 unsigned long qplockflags;
759 nesqp = (struct nes_qp *)recv_entry->skb;
761 spin_lock_irqsave(&nesqp->lock, qplockflags);
763 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
764 "refcount = %d: HIT A "
765 "NES_TIMER_TYPE_CLOSE with something "
766 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
767 atomic_read(&nesqp->refcount));
768 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
769 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
770 nesqp->ibqp_state = IB_QPS_ERR;
771 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
772 nes_cm_disconn(nesqp);
774 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
775 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
776 "refcount = %d: HIT A "
777 "NES_TIMER_TYPE_CLOSE with nothing "
778 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
779 atomic_read(&nesqp->refcount));
781 } else if (rem_node) {
782 /* TIME_WAIT state */
783 rem_ref_cm_node(cm_node->cm_core, cm_node);
786 cm_id->rem_ref(cm_id);
788 cm_node->recv_entry = NULL;
794 static void nes_cm_timer_tick(unsigned long pass)
797 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
798 struct nes_cm_node *cm_node;
799 struct nes_timer_entry *send_entry, *recv_entry;
800 struct list_head *list_core_temp;
801 struct list_head *list_node;
802 struct nes_cm_core *cm_core = g_cm_core;
804 unsigned long timetosend;
805 int ret = NETDEV_TX_OK;
807 struct list_head timer_list;
809 INIT_LIST_HEAD(&timer_list);
810 spin_lock_irqsave(&cm_core->ht_lock, flags);
812 list_for_each_safe(list_node, list_core_temp,
813 &cm_core->connected_nodes) {
814 cm_node = container_of(list_node, struct nes_cm_node, list);
815 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
816 add_ref_cm_node(cm_node);
817 list_add(&cm_node->timer_entry, &timer_list);
820 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
822 list_for_each_safe(list_node, list_core_temp, &timer_list) {
823 cm_node = container_of(list_node, struct nes_cm_node,
825 recv_entry = cm_node->recv_entry;
828 if (time_after(recv_entry->timetosend, jiffies)) {
829 if (nexttimeout > recv_entry->timetosend ||
831 nexttimeout = recv_entry->timetosend;
835 handle_recv_entry(cm_node, 1);
839 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
841 send_entry = cm_node->send_entry;
844 if (time_after(send_entry->timetosend, jiffies)) {
845 if (cm_node->state != NES_CM_STATE_TSA) {
847 send_entry->timetosend) ||
850 send_entry->timetosend;
854 free_retrans_entry(cm_node);
859 if ((cm_node->state == NES_CM_STATE_TSA) ||
860 (cm_node->state == NES_CM_STATE_CLOSED)) {
861 free_retrans_entry(cm_node);
865 if (!send_entry->retranscount ||
866 !send_entry->retrycount) {
867 cm_packets_dropped++;
868 free_retrans_entry(cm_node);
870 spin_unlock_irqrestore(
871 &cm_node->retrans_list_lock, flags);
872 nes_retrans_expired(cm_node);
873 cm_node->state = NES_CM_STATE_CLOSED;
874 spin_lock_irqsave(&cm_node->retrans_list_lock,
878 atomic_inc(&send_entry->skb->users);
879 cm_packets_retrans++;
880 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
881 "for node %p, jiffies = %lu, time to send = "
882 "%lu, retranscount = %u, send_entry->seq_num = "
883 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
884 "0x%08X\n", send_entry, cm_node, jiffies,
885 send_entry->timetosend,
886 send_entry->retranscount,
888 cm_node->tcp_cntxt.rem_ack_num);
890 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
892 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
893 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
894 if (ret != NETDEV_TX_OK) {
895 nes_debug(NES_DBG_CM, "rexmit failed for "
896 "node=%p\n", cm_node);
897 cm_packets_bounced++;
898 send_entry->retrycount--;
899 nexttimeout = jiffies + NES_SHORT_TIME;
905 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
906 "%u, retry count = %u.\n",
907 send_entry->retranscount,
908 send_entry->retrycount);
909 if (send_entry->send_retrans) {
910 send_entry->retranscount--;
911 timetosend = (NES_RETRY_TIMEOUT <<
912 (NES_DEFAULT_RETRANS - send_entry->retranscount));
914 send_entry->timetosend = jiffies +
915 min(timetosend, NES_MAX_TIMEOUT);
916 if (nexttimeout > send_entry->timetosend ||
918 nexttimeout = send_entry->timetosend;
922 int close_when_complete;
923 close_when_complete =
924 send_entry->close_when_complete;
925 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
926 cm_node, cm_node->state);
927 free_retrans_entry(cm_node);
928 if (close_when_complete)
929 rem_ref_cm_node(cm_node->cm_core,
934 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
935 rem_ref_cm_node(cm_node->cm_core, cm_node);
939 if (!timer_pending(&cm_core->tcp_timer)) {
940 cm_core->tcp_timer.expires = nexttimeout;
941 add_timer(&cm_core->tcp_timer);
950 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
955 char optionsbuffer[sizeof(struct option_mss) +
956 sizeof(struct option_windowscale) + sizeof(struct option_base) +
957 TCP_OPTIONS_PADDING];
960 /* Sending MSS option */
961 union all_known_options *options;
966 options = (union all_known_options *)&optionsbuffer[optionssize];
967 options->as_mss.optionnum = OPTION_NUMBER_MSS;
968 options->as_mss.length = sizeof(struct option_mss);
969 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
970 optionssize += sizeof(struct option_mss);
972 options = (union all_known_options *)&optionsbuffer[optionssize];
973 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
974 options->as_windowscale.length = sizeof(struct option_windowscale);
975 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
976 optionssize += sizeof(struct option_windowscale);
978 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
979 options = (union all_known_options *)&optionsbuffer[optionssize];
980 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
981 options->as_base.length = sizeof(struct option_base);
982 optionssize += sizeof(struct option_base);
983 /* we need the size to be a multiple of 4 */
984 options = (union all_known_options *)&optionsbuffer[optionssize];
987 options = (union all_known_options *)&optionsbuffer[optionssize];
992 options = (union all_known_options *)&optionsbuffer[optionssize];
993 options->as_end = OPTION_NUMBER_END;
997 skb = dev_alloc_skb(MAX_CM_BUFFER);
999 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1006 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1007 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1016 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1019 int flags = SET_RST | SET_ACK;
1022 skb = dev_alloc_skb(MAX_CM_BUFFER);
1024 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1028 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1029 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1038 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1043 skb = dev_alloc_skb(MAX_CM_BUFFER);
1046 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1050 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1051 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1060 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1064 /* if we didn't get a frame get one */
1066 skb = dev_alloc_skb(MAX_CM_BUFFER);
1069 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1073 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1074 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1081 * find_node - find a cm node that matches the reference cm node
1083 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1084 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1086 unsigned long flags;
1087 struct list_head *hte;
1088 struct nes_cm_node *cm_node;
1090 /* get a handle on the hte */
1091 hte = &cm_core->connected_nodes;
1093 /* walk list and find cm_node associated with this session ID */
1094 spin_lock_irqsave(&cm_core->ht_lock, flags);
1095 list_for_each_entry(cm_node, hte, list) {
1096 /* compare quad, return node handle if a match */
1097 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1098 cm_node->loc_addr, cm_node->loc_port,
1100 cm_node->rem_addr, cm_node->rem_port,
1101 rem_addr, rem_port);
1102 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
1103 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
1104 add_ref_cm_node(cm_node);
1105 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1109 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1117 * find_listener - find a cm node listening on this addr-port pair
1119 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1120 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
1122 unsigned long flags;
1123 struct nes_cm_listener *listen_node;
1125 /* walk list and find cm_node associated with this session ID */
1126 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1127 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1128 /* compare node pair, return node handle if a match */
1129 if (((listen_node->loc_addr == dst_addr) ||
1130 listen_node->loc_addr == 0x00000000) &&
1131 (listen_node->loc_port == dst_port) &&
1132 (listener_state & listen_node->listener_state)) {
1133 atomic_inc(&listen_node->ref_count);
1134 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1138 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1146 * add_hte_node - add a cm node to the hash table
1148 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1150 unsigned long flags;
1151 struct list_head *hte;
1153 if (!cm_node || !cm_core)
1156 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1159 spin_lock_irqsave(&cm_core->ht_lock, flags);
1161 /* get a handle on the hash table element (list head for this slot) */
1162 hte = &cm_core->connected_nodes;
1163 list_add_tail(&cm_node->list, hte);
1164 atomic_inc(&cm_core->ht_node_cnt);
1166 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1173 * mini_cm_dec_refcnt_listen
1175 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1176 struct nes_cm_listener *listener, int free_hanging_nodes)
1180 unsigned long flags;
1181 struct list_head *list_pos = NULL;
1182 struct list_head *list_temp = NULL;
1183 struct nes_cm_node *cm_node = NULL;
1184 struct list_head reset_list;
1186 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1187 "refcnt=%d\n", listener, free_hanging_nodes,
1188 atomic_read(&listener->ref_count));
1189 /* free non-accelerated child nodes for this listener */
1190 INIT_LIST_HEAD(&reset_list);
1191 if (free_hanging_nodes) {
1192 spin_lock_irqsave(&cm_core->ht_lock, flags);
1193 list_for_each_safe(list_pos, list_temp,
1194 &g_cm_core->connected_nodes) {
1195 cm_node = container_of(list_pos, struct nes_cm_node,
1197 if ((cm_node->listener == listener) &&
1198 (!cm_node->accelerated)) {
1199 add_ref_cm_node(cm_node);
1200 list_add(&cm_node->reset_entry, &reset_list);
1203 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1206 list_for_each_safe(list_pos, list_temp, &reset_list) {
1207 cm_node = container_of(list_pos, struct nes_cm_node,
1210 struct nes_cm_node *loopback = cm_node->loopbackpartner;
1211 enum nes_cm_node_state old_state;
1212 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1213 rem_ref_cm_node(cm_node->cm_core, cm_node);
1216 cleanup_retrans_entry(cm_node);
1217 err = send_reset(cm_node, NULL);
1220 NES_CM_STATE_CLOSED;
1223 old_state = cm_node->state;
1224 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1225 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1231 struct nes_cm_event event;
1233 event.cm_node = loopback;
1234 event.cm_info.rem_addr =
1236 event.cm_info.loc_addr =
1238 event.cm_info.rem_port =
1240 event.cm_info.loc_port =
1242 event.cm_info.cm_id = loopback->cm_id;
1243 add_ref_cm_node(loopback);
1244 loopback->state = NES_CM_STATE_CLOSED;
1245 cm_event_connect_error(&event);
1246 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1248 rem_ref_cm_node(cm_node->cm_core,
1256 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1257 if (!atomic_dec_return(&listener->ref_count)) {
1258 list_del(&listener->list);
1260 /* decrement our listen node count */
1261 atomic_dec(&cm_core->listen_node_cnt);
1263 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1265 if (listener->nesvnic)
1266 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1267 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1269 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1274 atomic_inc(&cm_listens_destroyed);
1276 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1279 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1280 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1281 " with non-zero pending accepts=%u\n",
1282 listener, atomic_read(&listener->pend_accepts_cnt));
1290 * mini_cm_del_listen
1292 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1293 struct nes_cm_listener *listener)
1295 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1296 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1297 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1302 * mini_cm_accelerated
1304 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1305 struct nes_cm_node *cm_node)
1309 cm_node->accelerated = 1;
1311 if (cm_node->accept_pend) {
1312 BUG_ON(!cm_node->listener);
1313 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1314 cm_node->accept_pend = 0;
1315 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1318 was_timer_set = timer_pending(&cm_core->tcp_timer);
1319 if (!was_timer_set) {
1320 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1321 add_timer(&cm_core->tcp_timer);
1329 * nes_addr_resolve_neigh
1331 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1334 struct neighbour *neigh;
1336 struct net_device *netdev;
1337 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1339 rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
1341 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1346 if (netif_is_bond_slave(nesvnic->netdev))
1347 netdev = nesvnic->netdev->master;
1349 netdev = nesvnic->netdev;
1351 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, netdev);
1353 if (neigh->nud_state & NUD_VALID) {
1354 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1355 " is %pM, Gateway is 0x%08X \n", dst_ip,
1356 neigh->ha, ntohl(rt->rt_gateway));
1358 if (arpindex >= 0) {
1359 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1360 neigh->ha, ETH_ALEN)) {
1361 /* Mac address same as in nes_arp_table */
1362 neigh_release(neigh);
1367 nes_manage_arp_cache(nesvnic->netdev,
1368 nesadapter->arp_table[arpindex].mac_addr,
1369 dst_ip, NES_ARP_DELETE);
1372 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1373 dst_ip, NES_ARP_ADD);
1374 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1377 neigh_release(neigh);
1380 if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1381 neigh_event_send(dst_get_neighbour(&rt->dst), NULL);
1388 * make_cm_node - create a new instance of a cm node
1390 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1391 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1392 struct nes_cm_listener *listener)
1394 struct nes_cm_node *cm_node;
1396 int oldarpindex = 0;
1398 struct nes_device *nesdev;
1399 struct nes_adapter *nesadapter;
1401 /* create an hte and cm_node for this instance */
1402 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1406 /* set our node specific transport info */
1407 cm_node->loc_addr = cm_info->loc_addr;
1408 cm_node->rem_addr = cm_info->rem_addr;
1409 cm_node->loc_port = cm_info->loc_port;
1410 cm_node->rem_port = cm_info->rem_port;
1412 cm_node->mpa_frame_rev = mpa_version;
1413 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1414 cm_node->ird_size = IETF_NO_IRD_ORD;
1415 cm_node->ord_size = IETF_NO_IRD_ORD;
1417 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1418 &cm_node->loc_addr, cm_node->loc_port,
1419 &cm_node->rem_addr, cm_node->rem_port);
1420 cm_node->listener = listener;
1421 cm_node->netdev = nesvnic->netdev;
1422 cm_node->cm_id = cm_info->cm_id;
1423 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1425 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1428 spin_lock_init(&cm_node->retrans_list_lock);
1430 cm_node->loopbackpartner = NULL;
1431 atomic_set(&cm_node->ref_count, 1);
1432 /* associate our parent CM core */
1433 cm_node->cm_core = cm_core;
1434 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1435 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1436 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1437 NES_CM_DEFAULT_RCV_WND_SCALE;
1438 ts = current_kernel_time();
1439 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1440 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1441 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1442 cm_node->tcp_cntxt.rcv_nxt = 0;
1443 /* get a unique session ID , add thread_id to an upcounter to handle race */
1444 atomic_inc(&cm_core->node_cnt);
1445 cm_node->conn_type = cm_info->conn_type;
1446 cm_node->apbvt_set = 0;
1447 cm_node->accept_pend = 0;
1449 cm_node->nesvnic = nesvnic;
1450 /* get some device handles, for arp lookup */
1451 nesdev = nesvnic->nesdev;
1452 nesadapter = nesdev->nesadapter;
1454 cm_node->loopbackpartner = NULL;
1456 /* get the mac addr for the remote node */
1457 if (ipv4_is_loopback(htonl(cm_node->rem_addr))) {
1458 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1460 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1461 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1468 /* copy the mac addr to node context */
1469 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1470 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1473 add_hte_node(cm_core, cm_node);
1474 atomic_inc(&cm_nodes_created);
1481 * add_ref_cm_node - destroy an instance of a cm node
1483 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1485 atomic_inc(&cm_node->ref_count);
1491 * rem_ref_cm_node - destroy an instance of a cm node
1493 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1494 struct nes_cm_node *cm_node)
1496 unsigned long flags;
1497 struct nes_qp *nesqp;
1502 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1503 if (atomic_dec_return(&cm_node->ref_count)) {
1504 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1507 list_del(&cm_node->list);
1508 atomic_dec(&cm_core->ht_node_cnt);
1509 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1511 /* if the node is destroyed before connection was accelerated */
1512 if (!cm_node->accelerated && cm_node->accept_pend) {
1513 BUG_ON(!cm_node->listener);
1514 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1515 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1517 WARN_ON(cm_node->send_entry);
1518 if (cm_node->recv_entry)
1519 handle_recv_entry(cm_node, 0);
1520 if (cm_node->listener) {
1521 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1523 if (cm_node->apbvt_set && cm_node->nesvnic) {
1524 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1526 cm_node->nesvnic->nesdev->pcidev->devfn),
1527 NES_MANAGE_APBVT_DEL);
1531 atomic_dec(&cm_core->node_cnt);
1532 atomic_inc(&cm_nodes_destroyed);
1533 nesqp = cm_node->nesqp;
1535 nesqp->cm_node = NULL;
1536 nes_rem_ref(&nesqp->ibqp);
1537 cm_node->nesqp = NULL;
1547 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1548 u32 optionsize, u32 syn_packet)
1552 union all_known_options *all_options;
1553 char got_mss_option = 0;
1555 while (offset < optionsize) {
1556 all_options = (union all_known_options *)(optionsloc + offset);
1557 switch (all_options->as_base.optionnum) {
1558 case OPTION_NUMBER_END:
1559 offset = optionsize;
1561 case OPTION_NUMBER_NONE:
1564 case OPTION_NUMBER_MSS:
1565 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1566 "Size: %d\n", __func__,
1567 all_options->as_mss.length, offset, optionsize);
1569 if (all_options->as_mss.length != 4) {
1572 tmp = ntohs(all_options->as_mss.mss);
1573 if (tmp > 0 && tmp <
1574 cm_node->tcp_cntxt.mss)
1575 cm_node->tcp_cntxt.mss = tmp;
1578 case OPTION_NUMBER_WINDOW_SCALE:
1579 cm_node->tcp_cntxt.snd_wscale =
1580 all_options->as_windowscale.shiftcount;
1583 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1584 all_options->as_base.optionnum);
1587 offset += all_options->as_base.length;
1589 if ((!got_mss_option) && (syn_packet))
1590 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1594 static void drop_packet(struct sk_buff *skb)
1596 atomic_inc(&cm_accel_dropped_pkts);
1597 dev_kfree_skb_any(skb);
1600 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1602 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1603 "refcnt=%d\n", cm_node, cm_node->state,
1604 atomic_read(&cm_node->ref_count));
1605 switch (cm_node->state) {
1606 case NES_CM_STATE_SYN_RCVD:
1607 case NES_CM_STATE_SYN_SENT:
1608 case NES_CM_STATE_ESTABLISHED:
1609 case NES_CM_STATE_MPAREJ_RCVD:
1610 cm_node->tcp_cntxt.rcv_nxt++;
1611 cleanup_retrans_entry(cm_node);
1612 cm_node->state = NES_CM_STATE_LAST_ACK;
1613 send_fin(cm_node, NULL);
1615 case NES_CM_STATE_MPAREQ_SENT:
1616 create_event(cm_node, NES_CM_EVENT_ABORTED);
1617 cm_node->tcp_cntxt.rcv_nxt++;
1618 cleanup_retrans_entry(cm_node);
1619 cm_node->state = NES_CM_STATE_CLOSED;
1620 add_ref_cm_node(cm_node);
1621 send_reset(cm_node, NULL);
1623 case NES_CM_STATE_FIN_WAIT1:
1624 cm_node->tcp_cntxt.rcv_nxt++;
1625 cleanup_retrans_entry(cm_node);
1626 cm_node->state = NES_CM_STATE_CLOSING;
1627 send_ack(cm_node, NULL);
1628 /* Wait for ACK as this is simultaneous close..
1629 * After we receive ACK, do not send anything..
1630 * Just rm the node.. Done.. */
1632 case NES_CM_STATE_FIN_WAIT2:
1633 cm_node->tcp_cntxt.rcv_nxt++;
1634 cleanup_retrans_entry(cm_node);
1635 cm_node->state = NES_CM_STATE_TIME_WAIT;
1636 send_ack(cm_node, NULL);
1637 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1639 case NES_CM_STATE_TIME_WAIT:
1640 cm_node->tcp_cntxt.rcv_nxt++;
1641 cleanup_retrans_entry(cm_node);
1642 cm_node->state = NES_CM_STATE_CLOSED;
1643 rem_ref_cm_node(cm_node->cm_core, cm_node);
1645 case NES_CM_STATE_TSA:
1647 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1648 cm_node, cm_node->state);
1654 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1655 struct tcphdr *tcph)
1658 int reset = 0; /* whether to send reset in case of err.. */
1659 atomic_inc(&cm_resets_recvd);
1660 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1661 " refcnt=%d\n", cm_node, cm_node->state,
1662 atomic_read(&cm_node->ref_count));
1663 cleanup_retrans_entry(cm_node);
1664 switch (cm_node->state) {
1665 case NES_CM_STATE_SYN_SENT:
1666 case NES_CM_STATE_MPAREQ_SENT:
1667 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1668 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1669 cm_node->listener, cm_node->state);
1670 switch (cm_node->mpa_frame_rev) {
1672 cm_node->mpa_frame_rev = IETF_MPA_V1;
1673 /* send a syn and goto syn sent state */
1674 cm_node->state = NES_CM_STATE_SYN_SENT;
1675 if (send_syn(cm_node, 0, NULL)) {
1676 active_open_err(cm_node, skb, reset);
1681 active_open_err(cm_node, skb, reset);
1685 case NES_CM_STATE_MPAREQ_RCVD:
1686 atomic_inc(&cm_node->passive_state);
1687 dev_kfree_skb_any(skb);
1689 case NES_CM_STATE_ESTABLISHED:
1690 case NES_CM_STATE_SYN_RCVD:
1691 case NES_CM_STATE_LISTENING:
1692 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1693 passive_open_err(cm_node, skb, reset);
1695 case NES_CM_STATE_TSA:
1696 active_open_err(cm_node, skb, reset);
1698 case NES_CM_STATE_CLOSED:
1701 case NES_CM_STATE_FIN_WAIT2:
1702 case NES_CM_STATE_FIN_WAIT1:
1703 case NES_CM_STATE_LAST_ACK:
1704 cm_node->cm_id->rem_ref(cm_node->cm_id);
1705 case NES_CM_STATE_TIME_WAIT:
1706 cm_node->state = NES_CM_STATE_CLOSED;
1707 rem_ref_cm_node(cm_node->cm_core, cm_node);
1717 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1720 int datasize = skb->len;
1721 u8 *dataloc = skb->data;
1723 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1726 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1728 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1729 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1730 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1731 "cm_node=%p listener=%p state=%d\n", __func__,
1732 __LINE__, cm_node, cm_node->listener,
1734 active_open_err(cm_node, skb, 1);
1736 passive_open_err(cm_node, skb, 1);
1741 switch (cm_node->state) {
1742 case NES_CM_STATE_ESTABLISHED:
1743 if (res_type == NES_MPA_REQUEST_REJECT)
1744 /*BIG problem as we are receiving the MPA.. So should
1745 * not be REJECT.. This is Passive Open.. We can
1746 * only receive it Reject for Active Open...*/
1748 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1749 type = NES_CM_EVENT_MPA_REQ;
1750 atomic_set(&cm_node->passive_state,
1751 NES_PASSIVE_STATE_INDICATED);
1753 case NES_CM_STATE_MPAREQ_SENT:
1754 cleanup_retrans_entry(cm_node);
1755 if (res_type == NES_MPA_REQUEST_REJECT) {
1756 type = NES_CM_EVENT_MPA_REJECT;
1757 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1759 type = NES_CM_EVENT_CONNECTED;
1760 cm_node->state = NES_CM_STATE_TSA;
1768 dev_kfree_skb_any(skb);
1769 create_event(cm_node, type);
1772 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1774 switch (cm_node->state) {
1775 case NES_CM_STATE_SYN_SENT:
1776 case NES_CM_STATE_MPAREQ_SENT:
1777 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1778 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1779 cm_node->listener, cm_node->state);
1780 active_open_err(cm_node, skb, 1);
1782 case NES_CM_STATE_ESTABLISHED:
1783 case NES_CM_STATE_SYN_RCVD:
1784 passive_open_err(cm_node, skb, 1);
1786 case NES_CM_STATE_TSA:
1792 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1793 struct sk_buff *skb)
1797 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1799 active_open_err(cm_node, skb, 1);
1804 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1805 struct sk_buff *skb)
1810 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1811 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1814 seq = ntohl(tcph->seq);
1815 ack_seq = ntohl(tcph->ack_seq);
1816 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1817 if (ack_seq != loc_seq_num)
1819 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
1822 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1823 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1824 cm_node->listener, cm_node->state);
1825 indicate_pkt_err(cm_node, skb);
1826 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1827 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1834 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1835 * is created with a listener or it may comein as rexmitted packet which in
1836 * that case will be just dropped.
1838 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1839 struct tcphdr *tcph)
1845 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1847 inc_sequence = ntohl(tcph->seq);
1849 switch (cm_node->state) {
1850 case NES_CM_STATE_SYN_SENT:
1851 case NES_CM_STATE_MPAREQ_SENT:
1852 /* Rcvd syn on active open connection*/
1853 active_open_err(cm_node, skb, 1);
1855 case NES_CM_STATE_LISTENING:
1857 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1858 cm_node->listener->backlog) {
1859 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1862 passive_open_err(cm_node, skb, 0);
1865 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1868 passive_open_err(cm_node, skb, 0);
1872 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1873 BUG_ON(cm_node->send_entry);
1874 cm_node->accept_pend = 1;
1875 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1877 cm_node->state = NES_CM_STATE_SYN_RCVD;
1878 send_syn(cm_node, 1, skb);
1880 case NES_CM_STATE_CLOSED:
1881 cleanup_retrans_entry(cm_node);
1882 add_ref_cm_node(cm_node);
1883 send_reset(cm_node, skb);
1885 case NES_CM_STATE_TSA:
1886 case NES_CM_STATE_ESTABLISHED:
1887 case NES_CM_STATE_FIN_WAIT1:
1888 case NES_CM_STATE_FIN_WAIT2:
1889 case NES_CM_STATE_MPAREQ_RCVD:
1890 case NES_CM_STATE_LAST_ACK:
1891 case NES_CM_STATE_CLOSING:
1892 case NES_CM_STATE_UNKNOWN:
1899 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1900 struct tcphdr *tcph)
1906 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1908 inc_sequence = ntohl(tcph->seq);
1909 switch (cm_node->state) {
1910 case NES_CM_STATE_SYN_SENT:
1911 cleanup_retrans_entry(cm_node);
1913 if (check_syn(cm_node, tcph, skb))
1915 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1917 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1919 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1923 cleanup_retrans_entry(cm_node);
1924 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1925 send_mpa_request(cm_node, skb);
1926 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1928 case NES_CM_STATE_MPAREQ_RCVD:
1929 /* passive open, so should not be here */
1930 passive_open_err(cm_node, skb, 1);
1932 case NES_CM_STATE_LISTENING:
1933 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1934 cleanup_retrans_entry(cm_node);
1935 cm_node->state = NES_CM_STATE_CLOSED;
1936 send_reset(cm_node, skb);
1938 case NES_CM_STATE_CLOSED:
1939 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1940 cleanup_retrans_entry(cm_node);
1941 add_ref_cm_node(cm_node);
1942 send_reset(cm_node, skb);
1944 case NES_CM_STATE_ESTABLISHED:
1945 case NES_CM_STATE_FIN_WAIT1:
1946 case NES_CM_STATE_FIN_WAIT2:
1947 case NES_CM_STATE_LAST_ACK:
1948 case NES_CM_STATE_TSA:
1949 case NES_CM_STATE_CLOSING:
1950 case NES_CM_STATE_UNKNOWN:
1951 case NES_CM_STATE_MPAREQ_SENT:
1958 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1959 struct tcphdr *tcph)
1966 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1968 if (check_seq(cm_node, tcph, skb))
1971 skb_pull(skb, tcph->doff << 2);
1972 inc_sequence = ntohl(tcph->seq);
1973 datasize = skb->len;
1974 switch (cm_node->state) {
1975 case NES_CM_STATE_SYN_RCVD:
1977 cleanup_retrans_entry(cm_node);
1978 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1981 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1982 cm_node->state = NES_CM_STATE_ESTABLISHED;
1984 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1985 handle_rcv_mpa(cm_node, skb);
1986 } else { /* rcvd ACK only */
1987 dev_kfree_skb_any(skb);
1990 case NES_CM_STATE_ESTABLISHED:
1992 cleanup_retrans_entry(cm_node);
1994 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1995 handle_rcv_mpa(cm_node, skb);
2000 case NES_CM_STATE_MPAREQ_SENT:
2001 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2003 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2004 handle_rcv_mpa(cm_node, skb);
2005 } else { /* Could be just an ack pkt.. */
2006 dev_kfree_skb_any(skb);
2009 case NES_CM_STATE_LISTENING:
2010 cleanup_retrans_entry(cm_node);
2011 cm_node->state = NES_CM_STATE_CLOSED;
2012 send_reset(cm_node, skb);
2014 case NES_CM_STATE_CLOSED:
2015 cleanup_retrans_entry(cm_node);
2016 add_ref_cm_node(cm_node);
2017 send_reset(cm_node, skb);
2019 case NES_CM_STATE_LAST_ACK:
2020 case NES_CM_STATE_CLOSING:
2021 cleanup_retrans_entry(cm_node);
2022 cm_node->state = NES_CM_STATE_CLOSED;
2023 cm_node->cm_id->rem_ref(cm_node->cm_id);
2024 rem_ref_cm_node(cm_node->cm_core, cm_node);
2027 case NES_CM_STATE_FIN_WAIT1:
2028 cleanup_retrans_entry(cm_node);
2030 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2032 case NES_CM_STATE_SYN_SENT:
2033 case NES_CM_STATE_FIN_WAIT2:
2034 case NES_CM_STATE_TSA:
2035 case NES_CM_STATE_MPAREQ_RCVD:
2036 case NES_CM_STATE_UNKNOWN:
2038 cleanup_retrans_entry(cm_node);
2047 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2048 struct sk_buff *skb, int optionsize, int passive)
2050 u8 *optionsloc = (u8 *)&tcph[1];
2053 if (process_options(cm_node, optionsloc, optionsize,
2055 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2058 passive_open_err(cm_node, skb, 1);
2060 active_open_err(cm_node, skb, 1);
2065 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2066 cm_node->tcp_cntxt.snd_wscale;
2068 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2069 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2074 * active_open_err() will send reset() if flag set..
2075 * It will also send ABORT event.
2077 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2080 cleanup_retrans_entry(cm_node);
2082 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2083 "state=%d\n", cm_node, cm_node->state);
2084 add_ref_cm_node(cm_node);
2085 send_reset(cm_node, skb);
2087 dev_kfree_skb_any(skb);
2090 cm_node->state = NES_CM_STATE_CLOSED;
2091 create_event(cm_node, NES_CM_EVENT_ABORTED);
2095 * passive_open_err() will either do a reset() or will free up the skb and
2096 * remove the cm_node.
2098 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2101 cleanup_retrans_entry(cm_node);
2102 cm_node->state = NES_CM_STATE_CLOSED;
2104 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2105 "cm_node=%p state =%d\n", cm_node, cm_node->state);
2106 send_reset(cm_node, skb);
2108 dev_kfree_skb_any(skb);
2109 rem_ref_cm_node(cm_node->cm_core, cm_node);
2114 * free_retrans_entry() routines assumes that the retrans_list_lock has
2115 * been acquired before calling.
2117 static void free_retrans_entry(struct nes_cm_node *cm_node)
2119 struct nes_timer_entry *send_entry;
2121 send_entry = cm_node->send_entry;
2123 cm_node->send_entry = NULL;
2124 dev_kfree_skb_any(send_entry->skb);
2126 rem_ref_cm_node(cm_node->cm_core, cm_node);
2130 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2132 unsigned long flags;
2134 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2135 free_retrans_entry(cm_node);
2136 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2141 * Returns skb if to be freed, else it will return NULL if already used..
2143 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2144 struct nes_cm_core *cm_core)
2146 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2147 struct tcphdr *tcph = tcp_hdr(skb);
2151 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2153 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2154 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2155 tcph->ack, tcph->rst, tcph->fin);
2158 pkt_type = NES_PKT_TYPE_RST;
2159 } else if (tcph->syn) {
2160 pkt_type = NES_PKT_TYPE_SYN;
2162 pkt_type = NES_PKT_TYPE_SYNACK;
2163 } else if (tcph->ack) {
2164 pkt_type = NES_PKT_TYPE_ACK;
2170 case NES_PKT_TYPE_SYN:
2171 handle_syn_pkt(cm_node, skb, tcph);
2173 case NES_PKT_TYPE_SYNACK:
2174 handle_synack_pkt(cm_node, skb, tcph);
2176 case NES_PKT_TYPE_ACK:
2177 ret = handle_ack_pkt(cm_node, skb, tcph);
2178 if (fin_set && !ret)
2179 handle_fin_pkt(cm_node);
2181 case NES_PKT_TYPE_RST:
2182 handle_rst_pkt(cm_node, skb, tcph);
2185 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2186 handle_fin_pkt(cm_node);
2193 * mini_cm_listen - create a listen node with params
2195 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2196 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2198 struct nes_cm_listener *listener;
2199 unsigned long flags;
2201 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2202 cm_info->loc_addr, cm_info->loc_port);
2204 /* cannot have multiple matching listeners */
2205 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
2206 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
2207 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2208 /* find automatically incs ref count ??? */
2209 atomic_dec(&listener->ref_count);
2210 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2215 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2216 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2218 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2222 listener->loc_addr = htonl(cm_info->loc_addr);
2223 listener->loc_port = htons(cm_info->loc_port);
2224 listener->reused_node = 0;
2226 atomic_set(&listener->ref_count, 1);
2229 /* find already inc'ed the ref count */
2231 listener->reused_node = 1;
2234 listener->cm_id = cm_info->cm_id;
2235 atomic_set(&listener->pend_accepts_cnt, 0);
2236 listener->cm_core = cm_core;
2237 listener->nesvnic = nesvnic;
2238 atomic_inc(&cm_core->node_cnt);
2240 listener->conn_type = cm_info->conn_type;
2241 listener->backlog = cm_info->backlog;
2242 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2244 if (!listener->reused_node) {
2245 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2246 list_add(&listener->list, &cm_core->listen_list.list);
2247 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2248 atomic_inc(&cm_core->listen_node_cnt);
2251 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2252 " listener = %p, backlog = %d, cm_id = %p.\n",
2253 cm_info->loc_addr, cm_info->loc_port,
2254 listener, listener->backlog, listener->cm_id);
2261 * mini_cm_connect - make a connection node with params
2263 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2264 struct nes_vnic *nesvnic, u16 private_data_len,
2265 void *private_data, struct nes_cm_info *cm_info)
2268 struct nes_cm_node *cm_node;
2269 struct nes_cm_listener *loopbackremotelistener;
2270 struct nes_cm_node *loopbackremotenode;
2271 struct nes_cm_info loopback_cm_info;
2274 /* create a CM connection node */
2275 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2279 /* set our node side to client (active) side */
2280 cm_node->tcp_cntxt.client = 1;
2281 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2283 if (cm_info->loc_addr == cm_info->rem_addr) {
2284 loopbackremotelistener = find_listener(cm_core,
2285 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2286 NES_CM_LISTENER_ACTIVE_STATE);
2287 if (loopbackremotelistener == NULL) {
2288 create_event(cm_node, NES_CM_EVENT_ABORTED);
2290 loopback_cm_info = *cm_info;
2291 loopback_cm_info.loc_port = cm_info->rem_port;
2292 loopback_cm_info.rem_port = cm_info->loc_port;
2293 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2294 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2295 &loopback_cm_info, loopbackremotelistener);
2296 if (!loopbackremotenode) {
2297 rem_ref_cm_node(cm_node->cm_core, cm_node);
2300 atomic_inc(&cm_loopbacks);
2301 loopbackremotenode->loopbackpartner = cm_node;
2302 loopbackremotenode->tcp_cntxt.rcv_wscale =
2303 NES_CM_DEFAULT_RCV_WND_SCALE;
2304 cm_node->loopbackpartner = loopbackremotenode;
2305 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2307 loopbackremotenode->mpa_frame_size = private_data_len;
2309 /* we are done handling this state. */
2310 /* set node to a TSA state */
2311 cm_node->state = NES_CM_STATE_TSA;
2312 cm_node->tcp_cntxt.rcv_nxt =
2313 loopbackremotenode->tcp_cntxt.loc_seq_num;
2314 loopbackremotenode->tcp_cntxt.rcv_nxt =
2315 cm_node->tcp_cntxt.loc_seq_num;
2316 cm_node->tcp_cntxt.max_snd_wnd =
2317 loopbackremotenode->tcp_cntxt.rcv_wnd;
2318 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2319 cm_node->tcp_cntxt.rcv_wnd;
2320 cm_node->tcp_cntxt.snd_wnd =
2321 loopbackremotenode->tcp_cntxt.rcv_wnd;
2322 loopbackremotenode->tcp_cntxt.snd_wnd =
2323 cm_node->tcp_cntxt.rcv_wnd;
2324 cm_node->tcp_cntxt.snd_wscale =
2325 loopbackremotenode->tcp_cntxt.rcv_wscale;
2326 loopbackremotenode->tcp_cntxt.snd_wscale =
2327 cm_node->tcp_cntxt.rcv_wscale;
2328 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2329 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2334 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2335 cm_node->mpa_frame_size = private_data_len;
2337 memcpy(start_buff, private_data, private_data_len);
2339 /* send a syn and goto syn sent state */
2340 cm_node->state = NES_CM_STATE_SYN_SENT;
2341 ret = send_syn(cm_node, 0, NULL);
2344 /* error in sending the syn free up the cm_node struct */
2345 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2346 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2347 cm_node->rem_addr, cm_node->rem_port, cm_node,
2349 rem_ref_cm_node(cm_node->cm_core, cm_node);
2354 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2355 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2356 cm_node->rem_addr, cm_node->rem_port, cm_node,
2365 * mini_cm_accept - accept a connection
2366 * This function is never called
2368 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2375 * mini_cm_reject - reject and teardown a connection
2377 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2382 struct nes_cm_event event;
2383 struct iw_cm_id *cm_id = cm_node->cm_id;
2384 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2386 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2387 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2389 if (cm_node->tcp_cntxt.client)
2391 cleanup_retrans_entry(cm_node);
2394 passive_state = atomic_add_return(1, &cm_node->passive_state);
2395 if (passive_state == NES_SEND_RESET_EVENT) {
2396 cm_node->state = NES_CM_STATE_CLOSED;
2397 rem_ref_cm_node(cm_core, cm_node);
2399 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2400 rem_ref_cm_node(cm_core, cm_node);
2402 ret = send_mpa_reject(cm_node);
2404 cm_node->state = NES_CM_STATE_CLOSED;
2405 err = send_reset(cm_node, NULL);
2409 cm_id->add_ref(cm_id);
2414 cm_node->cm_id = NULL;
2415 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2416 rem_ref_cm_node(cm_core, cm_node);
2417 rem_ref_cm_node(cm_core, loopback);
2419 event.cm_node = loopback;
2420 event.cm_info.rem_addr = loopback->rem_addr;
2421 event.cm_info.loc_addr = loopback->loc_addr;
2422 event.cm_info.rem_port = loopback->rem_port;
2423 event.cm_info.loc_port = loopback->loc_port;
2424 event.cm_info.cm_id = loopback->cm_id;
2425 cm_event_mpa_reject(&event);
2426 rem_ref_cm_node(cm_core, cm_node);
2427 loopback->state = NES_CM_STATE_CLOSING;
2429 cm_id = loopback->cm_id;
2430 rem_ref_cm_node(cm_core, loopback);
2431 cm_id->rem_ref(cm_id);
2442 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2446 if (!cm_core || !cm_node)
2449 switch (cm_node->state) {
2450 case NES_CM_STATE_SYN_RCVD:
2451 case NES_CM_STATE_SYN_SENT:
2452 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2453 case NES_CM_STATE_ESTABLISHED:
2454 case NES_CM_STATE_ACCEPTING:
2455 case NES_CM_STATE_MPAREQ_SENT:
2456 case NES_CM_STATE_MPAREQ_RCVD:
2457 cleanup_retrans_entry(cm_node);
2458 send_reset(cm_node, NULL);
2460 case NES_CM_STATE_CLOSE_WAIT:
2461 cm_node->state = NES_CM_STATE_LAST_ACK;
2462 send_fin(cm_node, NULL);
2464 case NES_CM_STATE_FIN_WAIT1:
2465 case NES_CM_STATE_FIN_WAIT2:
2466 case NES_CM_STATE_LAST_ACK:
2467 case NES_CM_STATE_TIME_WAIT:
2468 case NES_CM_STATE_CLOSING:
2471 case NES_CM_STATE_LISTENING:
2472 cleanup_retrans_entry(cm_node);
2473 send_reset(cm_node, NULL);
2475 case NES_CM_STATE_MPAREJ_RCVD:
2476 case NES_CM_STATE_UNKNOWN:
2477 case NES_CM_STATE_INITED:
2478 case NES_CM_STATE_CLOSED:
2479 case NES_CM_STATE_LISTENER_DESTROYED:
2480 ret = rem_ref_cm_node(cm_core, cm_node);
2482 case NES_CM_STATE_TSA:
2483 if (cm_node->send_entry)
2484 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2485 "send_entry=%p\n", cm_node->send_entry);
2486 ret = rem_ref_cm_node(cm_core, cm_node);
2494 * recv_pkt - recv an ETHERNET packet, and process it through CM
2495 * node state machine
2497 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2498 struct nes_vnic *nesvnic, struct sk_buff *skb)
2500 struct nes_cm_node *cm_node = NULL;
2501 struct nes_cm_listener *listener = NULL;
2503 struct tcphdr *tcph;
2504 struct nes_cm_info nfo;
2505 int skb_handled = 1;
2506 __be32 tmp_daddr, tmp_saddr;
2510 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2513 iph = (struct iphdr *)skb->data;
2514 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2516 nfo.loc_addr = ntohl(iph->daddr);
2517 nfo.loc_port = ntohs(tcph->dest);
2518 nfo.rem_addr = ntohl(iph->saddr);
2519 nfo.rem_port = ntohs(tcph->source);
2521 tmp_daddr = cpu_to_be32(iph->daddr);
2522 tmp_saddr = cpu_to_be32(iph->saddr);
2524 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2525 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2528 cm_node = find_node(cm_core,
2529 nfo.rem_port, nfo.rem_addr,
2530 nfo.loc_port, nfo.loc_addr);
2533 /* Only type of packet accepted are for */
2534 /* the PASSIVE open (syn only) */
2535 if ((!tcph->syn) || (tcph->ack)) {
2539 listener = find_listener(cm_core, nfo.loc_addr,
2541 NES_CM_LISTENER_ACTIVE_STATE);
2545 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2549 nfo.cm_id = listener->cm_id;
2550 nfo.conn_type = listener->conn_type;
2551 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2554 nes_debug(NES_DBG_CM, "Unable to allocate "
2556 cm_packets_dropped++;
2557 atomic_dec(&listener->ref_count);
2558 dev_kfree_skb_any(skb);
2561 if (!tcph->rst && !tcph->fin) {
2562 cm_node->state = NES_CM_STATE_LISTENING;
2564 cm_packets_dropped++;
2565 rem_ref_cm_node(cm_core, cm_node);
2566 dev_kfree_skb_any(skb);
2569 add_ref_cm_node(cm_node);
2570 } else if (cm_node->state == NES_CM_STATE_TSA) {
2571 if (cm_node->nesqp->pau_mode)
2572 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2574 rem_ref_cm_node(cm_core, cm_node);
2575 atomic_inc(&cm_accel_dropped_pkts);
2576 dev_kfree_skb_any(skb);
2580 skb_reset_network_header(skb);
2581 skb_set_transport_header(skb, sizeof(*tcph));
2582 skb->len = ntohs(iph->tot_len);
2583 process_packet(cm_node, skb, cm_core);
2584 rem_ref_cm_node(cm_core, cm_node);
2591 * nes_cm_alloc_core - allocate a top level instance of a cm core
2593 static struct nes_cm_core *nes_cm_alloc_core(void)
2595 struct nes_cm_core *cm_core;
2597 /* setup the CM core */
2598 /* alloc top level core control structure */
2599 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2603 INIT_LIST_HEAD(&cm_core->connected_nodes);
2604 init_timer(&cm_core->tcp_timer);
2605 cm_core->tcp_timer.function = nes_cm_timer_tick;
2607 cm_core->mtu = NES_CM_DEFAULT_MTU;
2608 cm_core->state = NES_CM_STATE_INITED;
2609 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2611 atomic_set(&cm_core->events_posted, 0);
2613 cm_core->api = &nes_cm_api;
2615 spin_lock_init(&cm_core->ht_lock);
2616 spin_lock_init(&cm_core->listen_list_lock);
2618 INIT_LIST_HEAD(&cm_core->listen_list.list);
2620 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2622 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2623 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2624 cm_core->post_event = nes_cm_post_event;
2625 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2626 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2628 print_core(cm_core);
2634 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2636 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2638 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2645 if (timer_pending(&cm_core->tcp_timer))
2646 del_timer(&cm_core->tcp_timer);
2648 destroy_workqueue(cm_core->event_wq);
2649 destroy_workqueue(cm_core->disconn_wq);
2650 nes_debug(NES_DBG_CM, "\n");
2660 static int mini_cm_get(struct nes_cm_core *cm_core)
2662 return cm_core->state;
2669 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2674 case NES_CM_SET_PKT_SIZE:
2675 cm_core->mtu = value;
2677 case NES_CM_SET_FREE_PKT_Q_SIZE:
2678 cm_core->free_tx_pkt_max = value;
2681 /* unknown set option */
2690 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2691 * successfully exchanged when this is called
2693 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2700 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2701 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2702 NES_QPCONTEXT_MISC_DROS);
2704 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2705 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2707 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2709 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2711 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2712 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2714 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2715 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2716 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2718 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2719 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2720 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2722 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2723 nesqp->nesqp_context->ts_recent = 0;
2724 nesqp->nesqp_context->ts_age = 0;
2725 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2726 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2727 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2728 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2729 cm_node->tcp_cntxt.rcv_wscale);
2730 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2731 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2732 nesqp->nesqp_context->srtt = 0;
2733 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2734 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2735 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2736 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2737 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2738 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2740 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2741 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2742 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2743 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2744 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2745 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2746 le32_to_cpu(nesqp->nesqp_context->misc));
2747 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2748 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2749 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2751 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2752 cm_node->state = NES_CM_STATE_TSA;
2761 int nes_cm_disconn(struct nes_qp *nesqp)
2763 struct disconn_work *work;
2765 work = kzalloc(sizeof *work, GFP_ATOMIC);
2767 return -ENOMEM; /* Timer will clean up */
2769 nes_add_ref(&nesqp->ibqp);
2770 work->nesqp = nesqp;
2771 INIT_WORK(&work->work, nes_disconnect_worker);
2772 queue_work(g_cm_core->disconn_wq, &work->work);
2778 * nes_disconnect_worker
2780 static void nes_disconnect_worker(struct work_struct *work)
2782 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2783 struct nes_qp *nesqp = dwork->nesqp;
2786 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2787 nesqp->last_aeq, nesqp->hwqp.qp_id);
2788 nes_cm_disconn_true(nesqp);
2789 nes_rem_ref(&nesqp->ibqp);
2794 * nes_cm_disconn_true
2796 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2798 unsigned long flags;
2800 struct iw_cm_id *cm_id;
2801 struct iw_cm_event cm_event;
2802 struct nes_vnic *nesvnic;
2804 u8 original_hw_tcp_state;
2805 u8 original_ibqp_state;
2806 int disconn_status = 0;
2807 int issue_disconn = 0;
2808 int issue_close = 0;
2809 int issue_flush = 0;
2810 u32 flush_q = NES_CQP_FLUSH_RQ;
2811 struct ib_event ibevent;
2814 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2818 spin_lock_irqsave(&nesqp->lock, flags);
2819 cm_id = nesqp->cm_id;
2820 /* make sure we havent already closed this connection */
2822 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2824 spin_unlock_irqrestore(&nesqp->lock, flags);
2828 nesvnic = to_nesvnic(nesqp->ibqp.device);
2829 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2831 original_hw_tcp_state = nesqp->hw_tcp_state;
2832 original_ibqp_state = nesqp->ibqp_state;
2833 last_ae = nesqp->last_aeq;
2835 if (nesqp->term_flags) {
2838 nesqp->cm_id = NULL;
2839 if (nesqp->flush_issued == 0) {
2840 nesqp->flush_issued = 1;
2843 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2844 ((original_ibqp_state == IB_QPS_RTS) &&
2845 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2847 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2848 disconn_status = -ECONNRESET;
2851 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2852 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2853 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2854 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2856 nesqp->cm_id = NULL;
2857 if (nesqp->flush_issued == 0) {
2858 nesqp->flush_issued = 1;
2863 spin_unlock_irqrestore(&nesqp->lock, flags);
2865 if ((issue_flush) && (nesqp->destroyed == 0)) {
2866 /* Flush the queue(s) */
2867 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2868 flush_q |= NES_CQP_FLUSH_SQ;
2869 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2871 if (nesqp->term_flags) {
2872 ibevent.device = nesqp->ibqp.device;
2873 ibevent.event = nesqp->terminate_eventtype;
2874 ibevent.element.qp = &nesqp->ibqp;
2875 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2879 if ((cm_id) && (cm_id->event_handler)) {
2880 if (issue_disconn) {
2881 atomic_inc(&cm_disconnects);
2882 cm_event.event = IW_CM_EVENT_DISCONNECT;
2883 cm_event.status = disconn_status;
2884 cm_event.local_addr = cm_id->local_addr;
2885 cm_event.remote_addr = cm_id->remote_addr;
2886 cm_event.private_data = NULL;
2887 cm_event.private_data_len = 0;
2889 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2890 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2891 "cm_id = %p, refcount = %u.\n",
2892 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2893 nesqp->hwqp.sq_tail, cm_id,
2894 atomic_read(&nesqp->refcount));
2896 ret = cm_id->event_handler(cm_id, &cm_event);
2898 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2899 "returned, ret=%d\n", ret);
2903 atomic_inc(&cm_closes);
2904 nes_disconnect(nesqp, 1);
2906 cm_id->provider_data = nesqp;
2907 /* Send up the close complete event */
2908 cm_event.event = IW_CM_EVENT_CLOSE;
2909 cm_event.status = 0;
2910 cm_event.provider_data = cm_id->provider_data;
2911 cm_event.local_addr = cm_id->local_addr;
2912 cm_event.remote_addr = cm_id->remote_addr;
2913 cm_event.private_data = NULL;
2914 cm_event.private_data_len = 0;
2916 ret = cm_id->event_handler(cm_id, &cm_event);
2918 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2920 cm_id->rem_ref(cm_id);
2931 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2934 struct nes_vnic *nesvnic;
2935 struct nes_device *nesdev;
2936 struct nes_ib_device *nesibdev;
2938 nesvnic = to_nesvnic(nesqp->ibqp.device);
2942 nesdev = nesvnic->nesdev;
2943 nesibdev = nesvnic->nesibdev;
2945 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2946 netdev_refcnt_read(nesvnic->netdev));
2948 if (nesqp->active_conn) {
2950 /* indicate this connection is NOT active */
2951 nesqp->active_conn = 0;
2953 /* Need to free the Last Streaming Mode Message */
2954 if (nesqp->ietf_frame) {
2956 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2957 pci_free_consistent(nesdev->pcidev,
2958 nesqp->private_data_len + nesqp->ietf_frame_size,
2959 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2963 /* close the CM node down if it is still active */
2964 if (nesqp->cm_node) {
2965 nes_debug(NES_DBG_CM, "Call close API\n");
2967 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2977 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2981 struct nes_qp *nesqp;
2982 struct nes_vnic *nesvnic;
2983 struct nes_device *nesdev;
2984 struct nes_cm_node *cm_node;
2985 struct nes_adapter *adapter;
2986 struct ib_qp_attr attr;
2987 struct iw_cm_event cm_event;
2988 struct nes_hw_qp_wqe *wqe;
2989 struct nes_v4_quad nes_quad;
2993 struct nes_ib_device *nesibdev;
2994 struct ib_mr *ibmr = NULL;
2995 struct ib_phys_buf ibphysbuf;
2996 struct nes_pd *nespd;
2998 u8 mpa_frame_offset = 0;
2999 struct ietf_mpa_v2 *mpa_v2_frame;
3001 u8 *start_ptr = &start_addr;
3002 u8 **start_buff = &start_ptr;
3005 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3009 /* get all our handles */
3010 nesqp = to_nesqp(ibqp);
3011 nesvnic = to_nesvnic(nesqp->ibqp.device);
3012 nesdev = nesvnic->nesdev;
3013 adapter = nesdev->nesadapter;
3015 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3016 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3017 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3018 nesvnic->netdev->name);
3020 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3021 if (cm_node->loopbackpartner)
3022 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3023 rem_ref_cm_node(cm_node->cm_core, cm_node);
3027 passive_state = atomic_add_return(1, &cm_node->passive_state);
3028 if (passive_state == NES_SEND_RESET_EVENT) {
3029 rem_ref_cm_node(cm_node->cm_core, cm_node);
3033 /* associate the node with the QP */
3034 nesqp->cm_node = (void *)cm_node;
3035 cm_node->nesqp = nesqp;
3037 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3038 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3039 atomic_inc(&cm_accepts);
3041 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3042 netdev_refcnt_read(nesvnic->netdev));
3044 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3045 /* allocate the ietf frame and space for private data */
3046 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3047 nesqp->ietf_frame_size + conn_param->private_data_len,
3048 &nesqp->ietf_frame_pbase);
3050 if (!nesqp->ietf_frame) {
3051 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3054 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3056 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3057 mpa_frame_offset = 4;
3059 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3060 conn_param->private_data_len);
3062 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3063 nesqp->private_data_len = conn_param->private_data_len;
3065 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3066 wqe = &nesqp->hwqp.sq_vbase[0];
3068 if (cm_id->remote_addr.sin_addr.s_addr !=
3069 cm_id->local_addr.sin_addr.s_addr) {
3070 u64temp = (unsigned long)nesqp;
3071 nesibdev = nesvnic->nesibdev;
3072 nespd = nesqp->nespd;
3073 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3074 ibphysbuf.size = buff_len;
3075 tagged_offset = (u64)(unsigned long)*start_buff;
3076 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3078 IB_ACCESS_LOCAL_WRITE,
3081 nes_debug(NES_DBG_CM, "Unable to register memory region"
3082 "for lSMM for cm_node = %p \n",
3084 pci_free_consistent(nesdev->pcidev,
3085 nesqp->private_data_len + nesqp->ietf_frame_size,
3086 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3090 ibmr->pd = &nespd->ibpd;
3091 ibmr->device = nespd->ibpd.device;
3092 nesqp->lsmm_mr = ibmr;
3094 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3095 set_wqe_64bit_value(wqe->wqe_words,
3096 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3098 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3099 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3100 NES_IWARP_SQ_WQE_WRPDU);
3101 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3102 cpu_to_le32(buff_len);
3103 set_wqe_64bit_value(wqe->wqe_words,
3104 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3105 (u64)(unsigned long)(*start_buff));
3106 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3107 cpu_to_le32(buff_len);
3108 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3109 if (nesqp->sq_kmapped) {
3110 nesqp->sq_kmapped = 0;
3111 kunmap(nesqp->page);
3114 nesqp->nesqp_context->ird_ord_sizes |=
3115 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3116 NES_QPCONTEXT_ORDIRD_WRPDU);
3118 nesqp->nesqp_context->ird_ord_sizes |=
3119 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3121 nesqp->skip_lsmm = 1;
3124 /* Cache the cm_id in the qp */
3125 nesqp->cm_id = cm_id;
3126 cm_node->cm_id = cm_id;
3128 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3129 cm_id->provider_data = nesqp;
3130 nesqp->active_conn = 0;
3132 if (cm_node->state == NES_CM_STATE_TSA)
3133 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3136 nes_cm_init_tsa_conn(nesqp, cm_node);
3138 nesqp->nesqp_context->tcpPorts[0] =
3139 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3140 nesqp->nesqp_context->tcpPorts[1] =
3141 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3143 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3144 nesqp->nesqp_context->ip0 =
3145 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3147 nesqp->nesqp_context->ip0 =
3148 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3150 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3151 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3152 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3154 nesqp->nesqp_context->arp_index_vlan |=
3155 cpu_to_le32(nes_arp_table(nesdev,
3156 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3157 NES_ARP_RESOLVE) << 16);
3159 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3160 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3162 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3164 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3165 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3166 nesqp->nesqp_context->ird_ord_sizes |=
3167 cpu_to_le32((u32)conn_param->ord);
3169 memset(&nes_quad, 0, sizeof(nes_quad));
3170 nes_quad.DstIpAdrIndex =
3171 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3172 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3173 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3175 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3176 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3177 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3179 /* Produce hash key */
3180 crc_value = get_crc_value(&nes_quad);
3181 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3182 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3183 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3185 nesqp->hte_index &= adapter->hte_index_mask;
3186 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3188 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3190 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3191 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3192 "private data length=%u.\n", nesqp->hwqp.qp_id,
3193 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3194 ntohs(cm_id->remote_addr.sin_port),
3195 ntohl(cm_id->local_addr.sin_addr.s_addr),
3196 ntohs(cm_id->local_addr.sin_port),
3197 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3198 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3201 /* notify OF layer that accept event was successful */
3202 cm_id->add_ref(cm_id);
3203 nes_add_ref(&nesqp->ibqp);
3205 cm_event.event = IW_CM_EVENT_ESTABLISHED;
3206 cm_event.status = 0;
3207 cm_event.provider_data = (void *)nesqp;
3208 cm_event.local_addr = cm_id->local_addr;
3209 cm_event.remote_addr = cm_id->remote_addr;
3210 cm_event.private_data = NULL;
3211 cm_event.private_data_len = 0;
3212 ret = cm_id->event_handler(cm_id, &cm_event);
3213 attr.qp_state = IB_QPS_RTS;
3214 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3215 if (cm_node->loopbackpartner) {
3216 cm_node->loopbackpartner->mpa_frame_size =
3217 nesqp->private_data_len;
3218 /* copy entire MPA frame to our cm_node's frame */
3219 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3220 conn_param->private_data, conn_param->private_data_len);
3221 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3224 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3225 "ret=%d\n", __func__, __LINE__, ret);
3234 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3236 struct nes_cm_node *cm_node;
3237 struct nes_cm_node *loopback;
3238 struct nes_cm_core *cm_core;
3241 atomic_inc(&cm_rejects);
3242 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3243 loopback = cm_node->loopbackpartner;
3244 cm_core = cm_node->cm_core;
3245 cm_node->cm_id = cm_id;
3247 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3251 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3252 loopback->mpa_frame.priv_data_len = pdata_len;
3253 loopback->mpa_frame_size = pdata_len;
3255 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3256 cm_node->mpa_frame_size = pdata_len;
3257 memcpy(start_buff, pdata, pdata_len);
3259 return cm_core->api->reject(cm_core, cm_node);
3265 * setup and launch cm connect node
3267 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3270 struct nes_qp *nesqp;
3271 struct nes_vnic *nesvnic;
3272 struct nes_device *nesdev;
3273 struct nes_cm_node *cm_node;
3274 struct nes_cm_info cm_info;
3277 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3280 nesqp = to_nesqp(ibqp);
3283 nesvnic = to_nesvnic(nesqp->ibqp.device);
3286 nesdev = nesvnic->nesdev;
3290 if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3293 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3294 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3295 ntohl(nesvnic->local_ipaddr),
3296 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3297 ntohs(cm_id->remote_addr.sin_port),
3298 ntohl(cm_id->local_addr.sin_addr.s_addr),
3299 ntohs(cm_id->local_addr.sin_port));
3301 atomic_inc(&cm_connects);
3302 nesqp->active_conn = 1;
3304 /* cache the cm_id in the qp */
3305 nesqp->cm_id = cm_id;
3307 cm_id->provider_data = nesqp;
3309 nesqp->private_data_len = conn_param->private_data_len;
3310 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3311 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3312 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3313 conn_param->private_data_len);
3315 if (cm_id->local_addr.sin_addr.s_addr !=
3316 cm_id->remote_addr.sin_addr.s_addr) {
3317 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3318 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3322 /* set up the connection params for the node */
3323 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3324 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3325 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3326 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3327 cm_info.cm_id = cm_id;
3328 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3330 cm_id->add_ref(cm_id);
3332 /* create a connect CM node connection */
3333 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3334 conn_param->private_data_len, (void *)conn_param->private_data,
3338 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3339 PCI_FUNC(nesdev->pcidev->devfn),
3340 NES_MANAGE_APBVT_DEL);
3342 cm_id->rem_ref(cm_id);
3346 cm_node->apbvt_set = apbvt_set;
3347 nesqp->cm_node = cm_node;
3348 cm_node->nesqp = nesqp;
3349 nes_add_ref(&nesqp->ibqp);
3358 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3360 struct nes_vnic *nesvnic;
3361 struct nes_cm_listener *cm_node;
3362 struct nes_cm_info cm_info;
3365 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3366 cm_id, ntohs(cm_id->local_addr.sin_port));
3368 nesvnic = to_nesvnic(cm_id->device);
3372 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3373 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3375 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3376 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3378 /* setup listen params in our api call struct */
3379 cm_info.loc_addr = nesvnic->local_ipaddr;
3380 cm_info.loc_port = cm_id->local_addr.sin_port;
3381 cm_info.backlog = backlog;
3382 cm_info.cm_id = cm_id;
3384 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3387 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3389 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3390 __func__, __LINE__);
3394 cm_id->provider_data = cm_node;
3396 if (!cm_node->reused_node) {
3397 err = nes_manage_apbvt(nesvnic,
3398 ntohs(cm_id->local_addr.sin_port),
3399 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3400 NES_MANAGE_APBVT_ADD);
3402 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3404 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3407 atomic_inc(&cm_listens_created);
3410 cm_id->add_ref(cm_id);
3411 cm_id->provider_data = (void *)cm_node;
3419 * nes_destroy_listen
3421 int nes_destroy_listen(struct iw_cm_id *cm_id)
3423 if (cm_id->provider_data)
3424 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3426 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3428 cm_id->rem_ref(cm_id);
3437 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3441 cm_packets_received++;
3442 if ((g_cm_core) && (g_cm_core->api))
3443 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3445 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3446 " cm is not setup properly.\n");
3454 * Start and init a cm core module
3456 int nes_cm_start(void)
3458 nes_debug(NES_DBG_CM, "\n");
3459 /* create the primary CM core, pass this handle to subsequent core inits */
3460 g_cm_core = nes_cm_alloc_core();
3470 * stop and dealloc all cm core instances
3472 int nes_cm_stop(void)
3474 g_cm_core->api->destroy_cm_core(g_cm_core);
3480 * cm_event_connected
3481 * handle a connected event, setup QPs and HW
3483 static void cm_event_connected(struct nes_cm_event *event)
3485 struct nes_qp *nesqp;
3486 struct nes_vnic *nesvnic;
3487 struct nes_device *nesdev;
3488 struct nes_cm_node *cm_node;
3489 struct nes_adapter *nesadapter;
3490 struct ib_qp_attr attr;
3491 struct iw_cm_id *cm_id;
3492 struct iw_cm_event cm_event;
3493 struct nes_v4_quad nes_quad;
3497 /* get all our handles */
3498 cm_node = event->cm_node;
3499 cm_id = cm_node->cm_id;
3500 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3501 nesqp = (struct nes_qp *)cm_id->provider_data;
3502 nesvnic = to_nesvnic(nesqp->ibqp.device);
3503 nesdev = nesvnic->nesdev;
3504 nesadapter = nesdev->nesadapter;
3506 if (nesqp->destroyed)
3508 atomic_inc(&cm_connecteds);
3509 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3510 " local port 0x%04X. jiffies = %lu.\n",
3512 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3513 ntohs(cm_id->remote_addr.sin_port),
3514 ntohs(cm_id->local_addr.sin_port),
3517 nes_cm_init_tsa_conn(nesqp, cm_node);
3519 /* set the QP tsa context */
3520 nesqp->nesqp_context->tcpPorts[0] =
3521 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3522 nesqp->nesqp_context->tcpPorts[1] =
3523 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3524 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3525 nesqp->nesqp_context->ip0 =
3526 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3528 nesqp->nesqp_context->ip0 =
3529 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3531 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3532 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3533 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3534 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3535 nes_arp_table(nesdev,
3536 le32_to_cpu(nesqp->nesqp_context->ip0),
3537 NULL, NES_ARP_RESOLVE) << 16);
3538 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3539 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3540 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3541 nesqp->nesqp_context->ird_ord_sizes |=
3542 cpu_to_le32((u32)1 <<
3543 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3545 /* Adjust tail for not having a LSMM */
3546 /*nesqp->hwqp.sq_tail = 1;*/
3548 build_rdma0_msg(cm_node, &nesqp);
3550 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3551 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3553 memset(&nes_quad, 0, sizeof(nes_quad));
3555 nes_quad.DstIpAdrIndex =
3556 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3557 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3558 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3560 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3561 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3562 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3564 /* Produce hash key */
3565 crc_value = get_crc_value(&nes_quad);
3566 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3567 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3568 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3570 nesqp->hte_index &= nesadapter->hte_index_mask;
3571 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3573 nesqp->ietf_frame = &cm_node->mpa_frame;
3574 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3575 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3577 /* notify OF layer we successfully created the requested connection */
3578 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3579 cm_event.status = 0;
3580 cm_event.provider_data = cm_id->provider_data;
3581 cm_event.local_addr.sin_family = AF_INET;
3582 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3583 cm_event.remote_addr = cm_id->remote_addr;
3585 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3586 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3587 cm_event.ird = cm_node->ird_size;
3588 cm_event.ord = cm_node->ord_size;
3590 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3591 ret = cm_id->event_handler(cm_id, &cm_event);
3592 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3595 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3596 "ret=%d\n", __func__, __LINE__, ret);
3597 attr.qp_state = IB_QPS_RTS;
3598 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3600 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3601 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3608 * cm_event_connect_error
3610 static void cm_event_connect_error(struct nes_cm_event *event)
3612 struct nes_qp *nesqp;
3613 struct iw_cm_id *cm_id;
3614 struct iw_cm_event cm_event;
3615 /* struct nes_cm_info cm_info; */
3618 if (!event->cm_node)
3621 cm_id = event->cm_node->cm_id;
3625 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3626 nesqp = cm_id->provider_data;
3631 /* notify OF layer about this connection error event */
3632 /* cm_id->rem_ref(cm_id); */
3633 nesqp->cm_id = NULL;
3634 cm_id->provider_data = NULL;
3635 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3636 cm_event.status = -ECONNRESET;
3637 cm_event.provider_data = cm_id->provider_data;
3638 cm_event.local_addr = cm_id->local_addr;
3639 cm_event.remote_addr = cm_id->remote_addr;
3640 cm_event.private_data = NULL;
3641 cm_event.private_data_len = 0;
3643 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3644 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3645 cm_event.remote_addr.sin_addr.s_addr);
3647 ret = cm_id->event_handler(cm_id, &cm_event);
3648 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3650 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3651 "ret=%d\n", __func__, __LINE__, ret);
3652 cm_id->rem_ref(cm_id);
3654 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3662 static void cm_event_reset(struct nes_cm_event *event)
3664 struct nes_qp *nesqp;
3665 struct iw_cm_id *cm_id;
3666 struct iw_cm_event cm_event;
3667 /* struct nes_cm_info cm_info; */
3670 if (!event->cm_node)
3673 if (!event->cm_node->cm_id)
3676 cm_id = event->cm_node->cm_id;
3678 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3679 nesqp = cm_id->provider_data;
3683 nesqp->cm_id = NULL;
3684 /* cm_id->provider_data = NULL; */
3685 cm_event.event = IW_CM_EVENT_DISCONNECT;
3686 cm_event.status = -ECONNRESET;
3687 cm_event.provider_data = cm_id->provider_data;
3688 cm_event.local_addr = cm_id->local_addr;
3689 cm_event.remote_addr = cm_id->remote_addr;
3690 cm_event.private_data = NULL;
3691 cm_event.private_data_len = 0;
3693 cm_id->add_ref(cm_id);
3694 ret = cm_id->event_handler(cm_id, &cm_event);
3695 atomic_inc(&cm_closes);
3696 cm_event.event = IW_CM_EVENT_CLOSE;
3697 cm_event.status = 0;
3698 cm_event.provider_data = cm_id->provider_data;
3699 cm_event.local_addr = cm_id->local_addr;
3700 cm_event.remote_addr = cm_id->remote_addr;
3701 cm_event.private_data = NULL;
3702 cm_event.private_data_len = 0;
3703 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3704 ret = cm_id->event_handler(cm_id, &cm_event);
3706 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3709 /* notify OF layer about this connection error event */
3710 cm_id->rem_ref(cm_id);
3719 static void cm_event_mpa_req(struct nes_cm_event *event)
3721 struct iw_cm_id *cm_id;
3722 struct iw_cm_event cm_event;
3724 struct nes_cm_node *cm_node;
3726 cm_node = event->cm_node;
3729 cm_id = cm_node->cm_id;
3731 atomic_inc(&cm_connect_reqs);
3732 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3733 cm_node, cm_id, jiffies);
3735 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3736 cm_event.status = 0;
3737 cm_event.provider_data = (void *)cm_node;
3739 cm_event.local_addr.sin_family = AF_INET;
3740 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3741 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3743 cm_event.remote_addr.sin_family = AF_INET;
3744 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3745 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3746 cm_event.private_data = cm_node->mpa_frame_buf;
3747 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3748 cm_event.ird = cm_node->ird_size;
3749 cm_event.ord = cm_node->ord_size;
3751 ret = cm_id->event_handler(cm_id, &cm_event);
3753 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3754 __func__, __LINE__, ret);
3759 static void cm_event_mpa_reject(struct nes_cm_event *event)
3761 struct iw_cm_id *cm_id;
3762 struct iw_cm_event cm_event;
3763 struct nes_cm_node *cm_node;
3766 cm_node = event->cm_node;
3769 cm_id = cm_node->cm_id;
3771 atomic_inc(&cm_connect_reqs);
3772 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3773 cm_node, cm_id, jiffies);
3775 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3776 cm_event.status = -ECONNREFUSED;
3777 cm_event.provider_data = cm_id->provider_data;
3779 cm_event.local_addr.sin_family = AF_INET;
3780 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3781 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3783 cm_event.remote_addr.sin_family = AF_INET;
3784 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3785 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3787 cm_event.private_data = cm_node->mpa_frame_buf;
3788 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3790 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3791 "remove_addr=%08x\n",
3792 cm_event.local_addr.sin_addr.s_addr,
3793 cm_event.remote_addr.sin_addr.s_addr);
3795 ret = cm_id->event_handler(cm_id, &cm_event);
3797 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3798 __func__, __LINE__, ret);
3804 static void nes_cm_event_handler(struct work_struct *);
3808 * post an event to the cm event handler
3810 static int nes_cm_post_event(struct nes_cm_event *event)
3812 atomic_inc(&event->cm_node->cm_core->events_posted);
3813 add_ref_cm_node(event->cm_node);
3814 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3815 INIT_WORK(&event->event_work, nes_cm_event_handler);
3816 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3817 event->cm_node, event);
3819 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3821 nes_debug(NES_DBG_CM, "Exit\n");
3827 * nes_cm_event_handler
3828 * worker function to handle cm events
3829 * will free instance of nes_cm_event
3831 static void nes_cm_event_handler(struct work_struct *work)
3833 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3835 struct nes_cm_core *cm_core;
3837 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3840 cm_core = event->cm_node->cm_core;
3841 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3842 event, event->type, atomic_read(&cm_core->events_posted));
3844 switch (event->type) {
3845 case NES_CM_EVENT_MPA_REQ:
3846 cm_event_mpa_req(event);
3847 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3850 case NES_CM_EVENT_RESET:
3851 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3853 cm_event_reset(event);
3855 case NES_CM_EVENT_CONNECTED:
3856 if ((!event->cm_node->cm_id) ||
3857 (event->cm_node->state != NES_CM_STATE_TSA))
3859 cm_event_connected(event);
3860 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3862 case NES_CM_EVENT_MPA_REJECT:
3863 if ((!event->cm_node->cm_id) ||
3864 (event->cm_node->state == NES_CM_STATE_TSA))
3866 cm_event_mpa_reject(event);
3867 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3870 case NES_CM_EVENT_ABORTED:
3871 if ((!event->cm_node->cm_id) ||
3872 (event->cm_node->state == NES_CM_STATE_TSA))
3874 cm_event_connect_error(event);
3875 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3877 case NES_CM_EVENT_DROPPED_PKT:
3878 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3881 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3885 atomic_dec(&cm_core->events_posted);
3886 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3887 rem_ref_cm_node(cm_core, event->cm_node);