2 * Copyright (c) 2006 - 2014 Intel Corporation. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #define TCPOPT_TIMESTAMP 8
37 #include <linux/atomic.h>
38 #include <linux/skbuff.h>
40 #include <linux/tcp.h>
41 #include <linux/init.h>
42 #include <linux/if_arp.h>
43 #include <linux/if_vlan.h>
44 #include <linux/notifier.h>
45 #include <linux/net.h>
46 #include <linux/types.h>
47 #include <linux/timer.h>
48 #include <linux/time.h>
49 #include <linux/delay.h>
50 #include <linux/etherdevice.h>
51 #include <linux/netdevice.h>
52 #include <linux/random.h>
53 #include <linux/list.h>
54 #include <linux/threads.h>
55 #include <linux/highmem.h>
56 #include <linux/slab.h>
58 #include <net/neighbour.h>
59 #include <net/route.h>
60 #include <net/ip_fib.h>
62 #include <linux/fcntl.h>
67 u32 cm_packets_bounced;
68 u32 cm_packets_dropped;
69 u32 cm_packets_retrans;
70 u32 cm_packets_created;
71 u32 cm_packets_received;
72 atomic_t cm_listens_created;
73 atomic_t cm_listens_destroyed;
75 atomic_t cm_loopbacks;
76 atomic_t cm_nodes_created;
77 atomic_t cm_nodes_destroyed;
78 atomic_t cm_accel_dropped_pkts;
79 atomic_t cm_resets_recvd;
81 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
82 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *);
83 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
84 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, struct nes_vnic *, u16, void *, struct nes_cm_info *);
85 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
86 static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *);
87 static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
88 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
89 static int mini_cm_dealloc_core(struct nes_cm_core *);
90 static int mini_cm_get(struct nes_cm_core *);
91 static int mini_cm_set(struct nes_cm_core *, u32, u32);
93 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
94 static int add_ref_cm_node(struct nes_cm_node *);
95 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
97 static int nes_cm_disconn_true(struct nes_qp *);
98 static int nes_cm_post_event(struct nes_cm_event *event);
99 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
100 static void nes_disconnect_worker(struct work_struct *work);
102 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
103 static int send_mpa_reject(struct nes_cm_node *);
104 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
105 static int send_reset(struct nes_cm_node *, struct sk_buff *);
106 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
107 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
108 static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
110 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
111 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
112 static void cleanup_retrans_entry(struct nes_cm_node *);
113 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
114 static void free_retrans_entry(struct nes_cm_node *cm_node);
115 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
117 /* CM event handler functions */
118 static void cm_event_connected(struct nes_cm_event *);
119 static void cm_event_connect_error(struct nes_cm_event *);
120 static void cm_event_reset(struct nes_cm_event *);
121 static void cm_event_mpa_req(struct nes_cm_event *);
122 static void cm_event_mpa_reject(struct nes_cm_event *);
123 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
125 /* MPA build functions */
126 static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
127 static void build_mpa_v2(struct nes_cm_node *, void *, u8);
128 static void build_mpa_v1(struct nes_cm_node *, void *, u8);
129 static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
131 static void print_core(struct nes_cm_core *core);
132 static void record_ird_ord(struct nes_cm_node *, u16, u16);
134 /* External CM API Interface */
135 /* instance of function pointers for client API */
136 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
137 static const struct nes_cm_ops nes_cm_api = {
138 .accelerated = mini_cm_accelerated,
139 .listen = mini_cm_listen,
140 .stop_listener = mini_cm_del_listen,
141 .connect = mini_cm_connect,
142 .close = mini_cm_close,
143 .accept = mini_cm_accept,
144 .reject = mini_cm_reject,
145 .recv_pkt = mini_cm_recv_pkt,
146 .destroy_cm_core = mini_cm_dealloc_core,
151 static struct nes_cm_core *g_cm_core;
153 atomic_t cm_connects;
155 atomic_t cm_disconnects;
157 atomic_t cm_connecteds;
158 atomic_t cm_connect_reqs;
161 int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
163 return add_ref_cm_node(cm_node);
166 int nes_rem_ref_cm_node(struct nes_cm_node *cm_node)
168 return rem_ref_cm_node(cm_node->cm_core, cm_node);
173 static struct nes_cm_event *create_event(struct nes_cm_node * cm_node,
174 enum nes_cm_event_type type)
176 struct nes_cm_event *event;
181 /* allocate an empty event */
182 event = kzalloc(sizeof(*event), GFP_ATOMIC);
188 event->cm_node = cm_node;
189 event->cm_info.rem_addr = cm_node->rem_addr;
190 event->cm_info.loc_addr = cm_node->loc_addr;
191 event->cm_info.rem_port = cm_node->rem_port;
192 event->cm_info.loc_port = cm_node->loc_port;
193 event->cm_info.cm_id = cm_node->cm_id;
195 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
196 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
197 cm_node, event, type, event->cm_info.loc_addr,
198 event->cm_info.loc_port, event->cm_info.rem_addr,
199 event->cm_info.rem_port);
201 nes_cm_post_event(event);
209 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
212 u8 *start_ptr = &start_addr;
213 u8 **start_buff = &start_ptr;
217 nes_debug(NES_DBG_CM, "skb set to NULL\n");
221 /* send an MPA Request frame */
222 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REQUEST);
223 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK);
225 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
230 static int send_mpa_reject(struct nes_cm_node *cm_node)
232 struct sk_buff *skb = NULL;
234 u8 *start_ptr = &start_addr;
235 u8 **start_buff = &start_ptr;
237 struct ietf_mpa_v1 *mpa_frame;
239 skb = dev_alloc_skb(MAX_CM_BUFFER);
241 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
245 /* send an MPA reject frame */
246 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY);
247 mpa_frame = (struct ietf_mpa_v1 *)*start_buff;
248 mpa_frame->flags |= IETF_MPA_FLAGS_REJECT;
249 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN);
251 cm_node->state = NES_CM_STATE_FIN_WAIT1;
252 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
257 * recv_mpa - process a received TCP pkt, we are expecting an
260 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
263 struct ietf_mpa_v1 *mpa_frame;
264 struct ietf_mpa_v2 *mpa_v2_frame;
265 struct ietf_rtr_msg *rtr_msg;
269 *type = NES_MPA_REQUEST_ACCEPT;
271 /* assume req frame is in tcp data payload */
272 if (len < sizeof(struct ietf_mpa_v1)) {
273 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
277 /* points to the beginning of the frame, which could be MPA V1 or V2 */
278 mpa_frame = (struct ietf_mpa_v1 *)buffer;
279 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
280 priv_data_len = ntohs(mpa_frame->priv_data_len);
282 /* make sure mpa private data len is less than 512 bytes */
283 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
284 nes_debug(NES_DBG_CM, "The received Length of Private"
285 " Data field exceeds 512 octets\n");
289 * make sure MPA receiver interoperate with the
290 * received MPA version and MPA key information
293 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
294 nes_debug(NES_DBG_CM, "The received mpa version"
295 " is not supported\n");
299 * backwards compatibility only
301 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
302 nes_debug(NES_DBG_CM, "The received mpa version"
303 " can not be interoperated\n");
306 cm_node->mpa_frame_rev = mpa_frame->rev;
309 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
310 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
311 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
315 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
316 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
321 if (priv_data_len + mpa_hdr_len != len) {
322 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
323 " complete (%x + %x != %x)\n",
324 priv_data_len, mpa_hdr_len, len);
327 /* make sure it does not exceed the max size */
328 if (len > MAX_CM_BUFFER) {
329 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
330 " (%x + %x != %x)\n",
331 priv_data_len, mpa_hdr_len, len);
335 cm_node->mpa_frame_size = priv_data_len;
337 switch (mpa_frame->rev) {
344 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
345 mpa_hdr_len += IETF_RTR_MSG_SIZE;
346 cm_node->mpa_frame_size -= IETF_RTR_MSG_SIZE;
347 rtr_msg = &mpa_v2_frame->rtr_msg;
349 /* parse rtr message */
350 rtr_ctrl_ird = ntohs(rtr_msg->ctrl_ird);
351 rtr_ctrl_ord = ntohs(rtr_msg->ctrl_ord);
352 ird_size = rtr_ctrl_ird & IETF_NO_IRD_ORD;
353 ord_size = rtr_ctrl_ord & IETF_NO_IRD_ORD;
355 if (!(rtr_ctrl_ird & IETF_PEER_TO_PEER)) {
359 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD)
360 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
362 if (cm_node->mpav2_ird_ord != IETF_NO_IRD_ORD) {
364 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
365 /* we are still negotiating */
366 if (ord_size > NES_MAX_IRD) {
367 cm_node->ird_size = NES_MAX_IRD;
369 cm_node->ird_size = ord_size;
371 (rtr_ctrl_ord & IETF_RDMA0_READ)) {
372 cm_node->ird_size = 1;
373 nes_debug(NES_DBG_CM,
374 "%s: Remote peer doesn't support RDMA0_READ (ord=%u)\n",
378 if (ird_size > NES_MAX_ORD)
379 cm_node->ord_size = NES_MAX_ORD;
381 cm_node->ord_size = ird_size;
382 } else { /* initiator */
383 if (ord_size > NES_MAX_IRD) {
384 nes_debug(NES_DBG_CM,
385 "%s: Unable to support the requested (ord =%u)\n",
389 cm_node->ird_size = ord_size;
391 if (ird_size > NES_MAX_ORD) {
392 cm_node->ord_size = NES_MAX_ORD;
395 (rtr_ctrl_ord & IETF_RDMA0_READ)) {
396 nes_debug(NES_DBG_CM,
397 "%s: Remote peer doesn't support RDMA0_READ (ird=%u)\n",
401 cm_node->ord_size = ird_size;
407 if (rtr_ctrl_ord & IETF_RDMA0_READ) {
408 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
410 } else if (rtr_ctrl_ord & IETF_RDMA0_WRITE) {
411 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
412 } else { /* Not supported RDMA0 operation */
422 /* copy entire MPA frame to our cm_node's frame */
423 memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size);
425 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
426 *type = NES_MPA_REQUEST_REJECT;
432 * form_cm_frame - get a free packet and build empty frame Use
433 * node info to build.
435 static void form_cm_frame(struct sk_buff *skb,
436 struct nes_cm_node *cm_node, void *options, u32 optionsize,
437 void *data, u32 datasize, u8 flags)
443 u16 packetsize = sizeof(*iph);
445 packetsize += sizeof(*tcph);
446 packetsize += optionsize + datasize;
449 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
451 buf = skb_put(skb, packetsize + ETH_HLEN);
453 ethh = (struct ethhdr *)buf;
456 iph = (struct iphdr *)buf;
458 tcph = (struct tcphdr *)buf;
459 skb_reset_mac_header(skb);
460 skb_set_network_header(skb, ETH_HLEN);
461 skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph));
462 buf += sizeof(*tcph);
464 skb->ip_summed = CHECKSUM_PARTIAL;
465 if (!(cm_node->netdev->features & NETIF_F_IP_CSUM))
466 skb->ip_summed = CHECKSUM_NONE;
467 skb->protocol = htons(0x800);
469 skb->mac_len = ETH_HLEN;
471 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
472 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
473 ethh->h_proto = htons(0x0800);
475 iph->version = IPVERSION;
476 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
478 iph->tot_len = htons(packetsize);
479 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
481 iph->frag_off = htons(0x4000);
483 iph->protocol = 0x06; /* IPPROTO_TCP */
485 iph->saddr = htonl(cm_node->loc_addr);
486 iph->daddr = htonl(cm_node->rem_addr);
488 tcph->source = htons(cm_node->loc_port);
489 tcph->dest = htons(cm_node->rem_port);
490 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
492 if (flags & SET_ACK) {
493 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
494 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
500 if (flags & SET_SYN) {
501 cm_node->tcp_cntxt.loc_seq_num++;
504 cm_node->tcp_cntxt.loc_seq_num += datasize;
507 if (flags & SET_FIN) {
508 cm_node->tcp_cntxt.loc_seq_num++;
515 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
516 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
519 memcpy(buf, options, optionsize);
522 memcpy(buf, data, datasize);
524 skb_shinfo(skb)->nr_frags = 0;
525 cm_packets_created++;
529 * print_core - dump a cm core
531 static void print_core(struct nes_cm_core *core)
533 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
534 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
537 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
539 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
541 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
542 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
544 nes_debug(NES_DBG_CM, "core : %p \n", core);
546 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
549 static void record_ird_ord(struct nes_cm_node *cm_node,
550 u16 conn_ird, u16 conn_ord)
552 if (conn_ird > NES_MAX_IRD)
553 conn_ird = NES_MAX_IRD;
555 if (conn_ord > NES_MAX_ORD)
556 conn_ord = NES_MAX_ORD;
558 cm_node->ird_size = conn_ird;
559 cm_node->ord_size = conn_ord;
563 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
565 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
566 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
570 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
572 switch (cm_node->mpa_frame_rev) {
574 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
575 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
576 build_mpa_v1(cm_node, *start_buff, mpa_key);
579 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
580 build_mpa_v2(cm_node, *start_buff, mpa_key);
589 * build_mpa_v2 - build a MPA V2 frame
591 static void build_mpa_v2(struct nes_cm_node *cm_node,
592 void *start_addr, u8 mpa_key)
594 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
595 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
599 /* initialize the upper 5 bytes of the frame */
600 build_mpa_v1(cm_node, start_addr, mpa_key);
601 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
602 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
604 /* initialize RTR msg */
605 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
606 ctrl_ird = IETF_NO_IRD_ORD;
607 ctrl_ord = IETF_NO_IRD_ORD;
609 ctrl_ird = cm_node->ird_size & IETF_NO_IRD_ORD;
610 ctrl_ord = cm_node->ord_size & IETF_NO_IRD_ORD;
612 ctrl_ird |= IETF_PEER_TO_PEER;
613 ctrl_ird |= IETF_FLPDU_ZERO_LEN;
616 case MPA_KEY_REQUEST:
617 ctrl_ord |= IETF_RDMA0_WRITE;
618 ctrl_ord |= IETF_RDMA0_READ;
621 switch (cm_node->send_rdma0_op) {
622 case SEND_RDMA_WRITE_ZERO:
623 ctrl_ord |= IETF_RDMA0_WRITE;
625 case SEND_RDMA_READ_ZERO:
626 ctrl_ord |= IETF_RDMA0_READ;
630 rtr_msg->ctrl_ird = htons(ctrl_ird);
631 rtr_msg->ctrl_ord = htons(ctrl_ord);
635 * build_mpa_v1 - build a MPA V1 frame
637 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
639 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
642 case MPA_KEY_REQUEST:
643 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
646 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
649 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
650 mpa_frame->rev = cm_node->mpa_frame_rev;
651 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
654 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
657 struct nes_qp *nesqp = *nesqp_addr;
658 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
660 u64temp = (unsigned long)nesqp->nesuqp_addr;
661 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
662 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
664 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
665 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
667 switch (cm_node->send_rdma0_op) {
668 case SEND_RDMA_WRITE_ZERO:
669 nes_debug(NES_DBG_CM, "Sending first write.\n");
670 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
671 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
672 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
673 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
674 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
677 case SEND_RDMA_READ_ZERO:
679 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
680 WARN(1, "Unsupported RDMA0 len operation=%u\n",
681 cm_node->send_rdma0_op);
682 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
683 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
684 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
685 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
686 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
687 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
688 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
689 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
693 if (nesqp->sq_kmapped) {
694 nesqp->sq_kmapped = 0;
698 /*use the reserved spot on the WQ for the extra first WQE*/
699 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
700 NES_QPCONTEXT_ORDIRD_WRPDU |
701 NES_QPCONTEXT_ORDIRD_ALSMM));
702 nesqp->skip_lsmm = 1;
703 nesqp->hwqp.sq_tail = 0;
708 * note - cm_node needs to be protected before calling this. Encase in:
709 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
711 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
712 enum nes_timer_type type, int send_retrans,
713 int close_when_complete)
716 struct nes_cm_core *cm_core = cm_node->cm_core;
717 struct nes_timer_entry *new_send;
720 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
724 /* new_send->timetosend = currenttime */
725 new_send->retrycount = NES_DEFAULT_RETRYS;
726 new_send->retranscount = NES_DEFAULT_RETRANS;
728 new_send->timetosend = jiffies;
729 new_send->type = type;
730 new_send->netdev = cm_node->netdev;
731 new_send->send_retrans = send_retrans;
732 new_send->close_when_complete = close_when_complete;
734 if (type == NES_TIMER_TYPE_CLOSE) {
735 new_send->timetosend += (HZ / 10);
736 if (cm_node->recv_entry) {
741 cm_node->recv_entry = new_send;
744 if (type == NES_TIMER_TYPE_SEND) {
745 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
746 atomic_inc(&new_send->skb->users);
747 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
748 cm_node->send_entry = new_send;
749 add_ref_cm_node(cm_node);
750 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
751 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
753 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
754 if (ret != NETDEV_TX_OK) {
755 nes_debug(NES_DBG_CM, "Error sending packet %p "
756 "(jiffies = %lu)\n", new_send, jiffies);
757 new_send->timetosend = jiffies;
762 cleanup_retrans_entry(cm_node);
763 if (close_when_complete)
764 rem_ref_cm_node(cm_core, cm_node);
770 if (!timer_pending(&cm_core->tcp_timer))
771 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
776 static void nes_retrans_expired(struct nes_cm_node *cm_node)
778 struct iw_cm_id *cm_id = cm_node->cm_id;
779 enum nes_cm_node_state state = cm_node->state;
780 cm_node->state = NES_CM_STATE_CLOSED;
783 case NES_CM_STATE_SYN_RCVD:
784 case NES_CM_STATE_CLOSING:
785 rem_ref_cm_node(cm_node->cm_core, cm_node);
787 case NES_CM_STATE_LAST_ACK:
788 case NES_CM_STATE_FIN_WAIT1:
790 cm_id->rem_ref(cm_id);
791 send_reset(cm_node, NULL);
794 add_ref_cm_node(cm_node);
795 send_reset(cm_node, NULL);
796 create_event(cm_node, NES_CM_EVENT_ABORTED);
800 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
802 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
803 struct iw_cm_id *cm_id = cm_node->cm_id;
804 struct nes_qp *nesqp;
805 unsigned long qplockflags;
809 nesqp = (struct nes_qp *)recv_entry->skb;
811 spin_lock_irqsave(&nesqp->lock, qplockflags);
813 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
814 "refcount = %d: HIT A "
815 "NES_TIMER_TYPE_CLOSE with something "
816 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
817 atomic_read(&nesqp->refcount));
818 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
819 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
820 nesqp->ibqp_state = IB_QPS_ERR;
821 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
822 nes_cm_disconn(nesqp);
824 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
825 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
826 "refcount = %d: HIT A "
827 "NES_TIMER_TYPE_CLOSE with nothing "
828 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
829 atomic_read(&nesqp->refcount));
831 } else if (rem_node) {
832 /* TIME_WAIT state */
833 rem_ref_cm_node(cm_node->cm_core, cm_node);
836 cm_id->rem_ref(cm_id);
838 cm_node->recv_entry = NULL;
844 static void nes_cm_timer_tick(unsigned long pass)
847 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
848 struct nes_cm_node *cm_node;
849 struct nes_timer_entry *send_entry, *recv_entry;
850 struct list_head *list_core_temp;
851 struct list_head *list_node;
852 struct nes_cm_core *cm_core = g_cm_core;
854 unsigned long timetosend;
855 int ret = NETDEV_TX_OK;
857 struct list_head timer_list;
859 INIT_LIST_HEAD(&timer_list);
860 spin_lock_irqsave(&cm_core->ht_lock, flags);
862 list_for_each_safe(list_node, list_core_temp,
863 &cm_core->connected_nodes) {
864 cm_node = container_of(list_node, struct nes_cm_node, list);
865 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
866 add_ref_cm_node(cm_node);
867 list_add(&cm_node->timer_entry, &timer_list);
870 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
872 list_for_each_safe(list_node, list_core_temp, &timer_list) {
873 cm_node = container_of(list_node, struct nes_cm_node,
875 recv_entry = cm_node->recv_entry;
878 if (time_after(recv_entry->timetosend, jiffies)) {
879 if (nexttimeout > recv_entry->timetosend ||
881 nexttimeout = recv_entry->timetosend;
885 handle_recv_entry(cm_node, 1);
889 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
891 send_entry = cm_node->send_entry;
894 if (time_after(send_entry->timetosend, jiffies)) {
895 if (cm_node->state != NES_CM_STATE_TSA) {
897 send_entry->timetosend) ||
900 send_entry->timetosend;
904 free_retrans_entry(cm_node);
909 if ((cm_node->state == NES_CM_STATE_TSA) ||
910 (cm_node->state == NES_CM_STATE_CLOSED)) {
911 free_retrans_entry(cm_node);
915 if (!send_entry->retranscount ||
916 !send_entry->retrycount) {
917 cm_packets_dropped++;
918 free_retrans_entry(cm_node);
920 spin_unlock_irqrestore(
921 &cm_node->retrans_list_lock, flags);
922 nes_retrans_expired(cm_node);
923 cm_node->state = NES_CM_STATE_CLOSED;
924 spin_lock_irqsave(&cm_node->retrans_list_lock,
928 atomic_inc(&send_entry->skb->users);
929 cm_packets_retrans++;
930 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
931 "for node %p, jiffies = %lu, time to send = "
932 "%lu, retranscount = %u, send_entry->seq_num = "
933 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
934 "0x%08X\n", send_entry, cm_node, jiffies,
935 send_entry->timetosend,
936 send_entry->retranscount,
938 cm_node->tcp_cntxt.rem_ack_num);
940 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
942 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
943 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
944 if (ret != NETDEV_TX_OK) {
945 nes_debug(NES_DBG_CM, "rexmit failed for "
946 "node=%p\n", cm_node);
947 cm_packets_bounced++;
948 send_entry->retrycount--;
949 nexttimeout = jiffies + NES_SHORT_TIME;
955 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
956 "%u, retry count = %u.\n",
957 send_entry->retranscount,
958 send_entry->retrycount);
959 if (send_entry->send_retrans) {
960 send_entry->retranscount--;
961 timetosend = (NES_RETRY_TIMEOUT <<
962 (NES_DEFAULT_RETRANS - send_entry->retranscount));
964 send_entry->timetosend = jiffies +
965 min(timetosend, NES_MAX_TIMEOUT);
966 if (nexttimeout > send_entry->timetosend ||
968 nexttimeout = send_entry->timetosend;
972 int close_when_complete;
973 close_when_complete =
974 send_entry->close_when_complete;
975 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
976 cm_node, cm_node->state);
977 free_retrans_entry(cm_node);
978 if (close_when_complete)
979 rem_ref_cm_node(cm_node->cm_core,
984 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
985 rem_ref_cm_node(cm_node->cm_core, cm_node);
989 if (!timer_pending(&cm_core->tcp_timer))
990 mod_timer(&cm_core->tcp_timer, nexttimeout);
998 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
1002 int flags = SET_SYN;
1003 char optionsbuffer[sizeof(struct option_mss) +
1004 sizeof(struct option_windowscale) + sizeof(struct option_base) +
1005 TCP_OPTIONS_PADDING];
1007 int optionssize = 0;
1008 /* Sending MSS option */
1009 union all_known_options *options;
1014 options = (union all_known_options *)&optionsbuffer[optionssize];
1015 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1016 options->as_mss.length = sizeof(struct option_mss);
1017 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1018 optionssize += sizeof(struct option_mss);
1020 options = (union all_known_options *)&optionsbuffer[optionssize];
1021 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1022 options->as_windowscale.length = sizeof(struct option_windowscale);
1023 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1024 optionssize += sizeof(struct option_windowscale);
1026 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
1027 options = (union all_known_options *)&optionsbuffer[optionssize];
1028 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
1029 options->as_base.length = sizeof(struct option_base);
1030 optionssize += sizeof(struct option_base);
1031 /* we need the size to be a multiple of 4 */
1032 options = (union all_known_options *)&optionsbuffer[optionssize];
1033 options->as_end = 1;
1035 options = (union all_known_options *)&optionsbuffer[optionssize];
1036 options->as_end = 1;
1040 options = (union all_known_options *)&optionsbuffer[optionssize];
1041 options->as_end = OPTION_NUMBER_END;
1045 skb = dev_alloc_skb(MAX_CM_BUFFER);
1047 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1054 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1055 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1064 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1067 int flags = SET_RST | SET_ACK;
1070 skb = dev_alloc_skb(MAX_CM_BUFFER);
1072 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1076 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1077 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1086 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1091 skb = dev_alloc_skb(MAX_CM_BUFFER);
1094 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1098 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1099 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1108 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1112 /* if we didn't get a frame get one */
1114 skb = dev_alloc_skb(MAX_CM_BUFFER);
1117 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1121 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1122 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1129 * find_node - find a cm node that matches the reference cm node
1131 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1132 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1134 unsigned long flags;
1135 struct list_head *hte;
1136 struct nes_cm_node *cm_node;
1138 /* get a handle on the hte */
1139 hte = &cm_core->connected_nodes;
1141 /* walk list and find cm_node associated with this session ID */
1142 spin_lock_irqsave(&cm_core->ht_lock, flags);
1143 list_for_each_entry(cm_node, hte, list) {
1144 /* compare quad, return node handle if a match */
1145 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1146 cm_node->loc_addr, cm_node->loc_port,
1148 cm_node->rem_addr, cm_node->rem_port,
1149 rem_addr, rem_port);
1150 if ((cm_node->loc_addr == loc_addr) &&
1151 (cm_node->loc_port == loc_port) &&
1152 (cm_node->rem_addr == rem_addr) &&
1153 (cm_node->rem_port == rem_port)) {
1154 add_ref_cm_node(cm_node);
1155 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1159 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1167 * find_listener - find a cm node listening on this addr-port pair
1169 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1170 nes_addr_t dst_addr, u16 dst_port,
1171 enum nes_cm_listener_state listener_state)
1173 unsigned long flags;
1174 struct nes_cm_listener *listen_node;
1175 nes_addr_t listen_addr;
1178 /* walk list and find cm_node associated with this session ID */
1179 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1180 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1181 listen_addr = listen_node->loc_addr;
1182 listen_port = listen_node->loc_port;
1184 /* compare node pair, return node handle if a match */
1185 if (((listen_addr == dst_addr) ||
1186 listen_addr == 0x00000000) &&
1187 (listen_port == dst_port) &&
1188 (listener_state & listen_node->listener_state)) {
1189 atomic_inc(&listen_node->ref_count);
1190 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1194 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1201 * add_hte_node - add a cm node to the hash table
1203 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1205 unsigned long flags;
1206 struct list_head *hte;
1208 if (!cm_node || !cm_core)
1211 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1214 spin_lock_irqsave(&cm_core->ht_lock, flags);
1216 /* get a handle on the hash table element (list head for this slot) */
1217 hte = &cm_core->connected_nodes;
1218 list_add_tail(&cm_node->list, hte);
1219 atomic_inc(&cm_core->ht_node_cnt);
1221 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1228 * mini_cm_dec_refcnt_listen
1230 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1231 struct nes_cm_listener *listener, int free_hanging_nodes)
1235 unsigned long flags;
1236 struct list_head *list_pos = NULL;
1237 struct list_head *list_temp = NULL;
1238 struct nes_cm_node *cm_node = NULL;
1239 struct list_head reset_list;
1241 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1242 "refcnt=%d\n", listener, free_hanging_nodes,
1243 atomic_read(&listener->ref_count));
1244 /* free non-accelerated child nodes for this listener */
1245 INIT_LIST_HEAD(&reset_list);
1246 if (free_hanging_nodes) {
1247 spin_lock_irqsave(&cm_core->ht_lock, flags);
1248 list_for_each_safe(list_pos, list_temp,
1249 &g_cm_core->connected_nodes) {
1250 cm_node = container_of(list_pos, struct nes_cm_node,
1252 if ((cm_node->listener == listener) &&
1253 (!cm_node->accelerated)) {
1254 add_ref_cm_node(cm_node);
1255 list_add(&cm_node->reset_entry, &reset_list);
1258 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1261 list_for_each_safe(list_pos, list_temp, &reset_list) {
1262 cm_node = container_of(list_pos, struct nes_cm_node,
1265 struct nes_cm_node *loopback = cm_node->loopbackpartner;
1266 enum nes_cm_node_state old_state;
1267 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1268 rem_ref_cm_node(cm_node->cm_core, cm_node);
1271 cleanup_retrans_entry(cm_node);
1272 err = send_reset(cm_node, NULL);
1275 NES_CM_STATE_CLOSED;
1278 old_state = cm_node->state;
1279 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1280 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1286 struct nes_cm_event event;
1288 event.cm_node = loopback;
1289 event.cm_info.rem_addr =
1291 event.cm_info.loc_addr =
1293 event.cm_info.rem_port =
1295 event.cm_info.loc_port =
1297 event.cm_info.cm_id = loopback->cm_id;
1298 add_ref_cm_node(loopback);
1299 loopback->state = NES_CM_STATE_CLOSED;
1300 cm_event_connect_error(&event);
1301 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1303 rem_ref_cm_node(cm_node->cm_core,
1311 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1312 if (!atomic_dec_return(&listener->ref_count)) {
1313 list_del(&listener->list);
1315 /* decrement our listen node count */
1316 atomic_dec(&cm_core->listen_node_cnt);
1318 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1320 if (listener->nesvnic) {
1321 nes_manage_apbvt(listener->nesvnic,
1323 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn),
1324 NES_MANAGE_APBVT_DEL);
1326 nes_debug(NES_DBG_NLMSG,
1327 "Delete APBVT loc_port = %04X\n",
1328 listener->loc_port);
1331 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1336 atomic_inc(&cm_listens_destroyed);
1338 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1341 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1342 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1343 " with non-zero pending accepts=%u\n",
1344 listener, atomic_read(&listener->pend_accepts_cnt));
1352 * mini_cm_del_listen
1354 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1355 struct nes_cm_listener *listener)
1357 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1358 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1359 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1364 * mini_cm_accelerated
1366 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1367 struct nes_cm_node *cm_node)
1369 cm_node->accelerated = 1;
1371 if (cm_node->accept_pend) {
1372 BUG_ON(!cm_node->listener);
1373 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1374 cm_node->accept_pend = 0;
1375 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1378 if (!timer_pending(&cm_core->tcp_timer))
1379 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
1386 * nes_addr_resolve_neigh
1388 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1391 struct neighbour *neigh;
1393 struct net_device *netdev;
1394 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1395 __be32 dst_ipaddr = htonl(dst_ip);
1397 rt = ip_route_output(&init_net, dst_ipaddr, nesvnic->local_ipaddr, 0, 0);
1399 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1404 if (netif_is_bond_slave(nesvnic->netdev))
1405 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
1407 netdev = nesvnic->netdev;
1409 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1413 if (neigh->nud_state & NUD_VALID) {
1414 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1415 " is %pM, Gateway is 0x%08X \n", dst_ip,
1416 neigh->ha, ntohl(rt->rt_gateway));
1418 if (arpindex >= 0) {
1419 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
1420 /* Mac address same as in nes_arp_table */
1424 nes_manage_arp_cache(nesvnic->netdev,
1425 nesadapter->arp_table[arpindex].mac_addr,
1426 dst_ip, NES_ARP_DELETE);
1429 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1430 dst_ip, NES_ARP_ADD);
1431 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1434 neigh_event_send(neigh, NULL);
1441 neigh_release(neigh);
1448 * make_cm_node - create a new instance of a cm node
1450 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1451 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1452 struct nes_cm_listener *listener)
1454 struct nes_cm_node *cm_node;
1456 int oldarpindex = 0;
1458 struct nes_device *nesdev;
1459 struct nes_adapter *nesadapter;
1461 /* create an hte and cm_node for this instance */
1462 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1466 /* set our node specific transport info */
1468 cm_node->loc_addr = listener->loc_addr;
1469 cm_node->loc_port = listener->loc_port;
1471 cm_node->loc_addr = cm_info->loc_addr;
1472 cm_node->loc_port = cm_info->loc_port;
1474 cm_node->rem_addr = cm_info->rem_addr;
1475 cm_node->rem_port = cm_info->rem_port;
1477 cm_node->mpa_frame_rev = mpa_version;
1478 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1479 cm_node->mpav2_ird_ord = 0;
1480 cm_node->ird_size = 0;
1481 cm_node->ord_size = 0;
1483 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1484 &cm_node->loc_addr, cm_node->loc_port,
1485 &cm_node->rem_addr, cm_node->rem_port);
1486 cm_node->listener = listener;
1488 cm_node->tos = listener->tos;
1489 cm_node->netdev = nesvnic->netdev;
1490 cm_node->cm_id = cm_info->cm_id;
1491 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1493 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1496 spin_lock_init(&cm_node->retrans_list_lock);
1498 cm_node->loopbackpartner = NULL;
1499 atomic_set(&cm_node->ref_count, 1);
1500 /* associate our parent CM core */
1501 cm_node->cm_core = cm_core;
1502 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1503 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1504 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1505 NES_CM_DEFAULT_RCV_WND_SCALE;
1506 ts = current_kernel_time();
1507 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1508 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1509 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1510 cm_node->tcp_cntxt.rcv_nxt = 0;
1511 /* get a unique session ID , add thread_id to an upcounter to handle race */
1512 atomic_inc(&cm_core->node_cnt);
1513 cm_node->conn_type = cm_info->conn_type;
1514 cm_node->apbvt_set = 0;
1515 cm_node->accept_pend = 0;
1517 cm_node->nesvnic = nesvnic;
1518 /* get some device handles, for arp lookup */
1519 nesdev = nesvnic->nesdev;
1520 nesadapter = nesdev->nesadapter;
1522 cm_node->loopbackpartner = NULL;
1524 /* get the mac addr for the remote node */
1525 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr,
1526 NULL, NES_ARP_RESOLVE);
1527 arpindex = nes_addr_resolve_neigh(nesvnic, cm_node->rem_addr,
1534 /* copy the mac addr to node context */
1535 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1536 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1539 add_hte_node(cm_core, cm_node);
1540 atomic_inc(&cm_nodes_created);
1547 * add_ref_cm_node - destroy an instance of a cm node
1549 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1551 atomic_inc(&cm_node->ref_count);
1557 * rem_ref_cm_node - destroy an instance of a cm node
1559 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1560 struct nes_cm_node *cm_node)
1562 unsigned long flags;
1563 struct nes_qp *nesqp;
1568 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1569 if (atomic_dec_return(&cm_node->ref_count)) {
1570 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1573 list_del(&cm_node->list);
1574 atomic_dec(&cm_core->ht_node_cnt);
1575 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1577 /* if the node is destroyed before connection was accelerated */
1578 if (!cm_node->accelerated && cm_node->accept_pend) {
1579 BUG_ON(!cm_node->listener);
1580 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1581 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1583 WARN_ON(cm_node->send_entry);
1584 if (cm_node->recv_entry)
1585 handle_recv_entry(cm_node, 0);
1586 if (cm_node->listener) {
1587 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1589 if (cm_node->apbvt_set && cm_node->nesvnic) {
1590 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1591 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1592 NES_MANAGE_APBVT_DEL);
1594 nes_debug(NES_DBG_NLMSG, "Delete APBVT loc_port = %04X\n",
1598 atomic_dec(&cm_core->node_cnt);
1599 atomic_inc(&cm_nodes_destroyed);
1600 nesqp = cm_node->nesqp;
1602 nesqp->cm_node = NULL;
1603 nes_rem_ref(&nesqp->ibqp);
1604 cm_node->nesqp = NULL;
1614 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1615 u32 optionsize, u32 syn_packet)
1619 union all_known_options *all_options;
1620 char got_mss_option = 0;
1622 while (offset < optionsize) {
1623 all_options = (union all_known_options *)(optionsloc + offset);
1624 switch (all_options->as_base.optionnum) {
1625 case OPTION_NUMBER_END:
1626 offset = optionsize;
1628 case OPTION_NUMBER_NONE:
1631 case OPTION_NUMBER_MSS:
1632 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1633 "Size: %d\n", __func__,
1634 all_options->as_mss.length, offset, optionsize);
1636 if (all_options->as_mss.length != 4) {
1639 tmp = ntohs(all_options->as_mss.mss);
1640 if (tmp > 0 && tmp <
1641 cm_node->tcp_cntxt.mss)
1642 cm_node->tcp_cntxt.mss = tmp;
1645 case OPTION_NUMBER_WINDOW_SCALE:
1646 cm_node->tcp_cntxt.snd_wscale =
1647 all_options->as_windowscale.shiftcount;
1650 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1651 all_options->as_base.optionnum);
1654 offset += all_options->as_base.length;
1656 if ((!got_mss_option) && (syn_packet))
1657 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1661 static void drop_packet(struct sk_buff *skb)
1663 atomic_inc(&cm_accel_dropped_pkts);
1664 dev_kfree_skb_any(skb);
1667 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1669 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1670 "refcnt=%d\n", cm_node, cm_node->state,
1671 atomic_read(&cm_node->ref_count));
1672 switch (cm_node->state) {
1673 case NES_CM_STATE_SYN_RCVD:
1674 case NES_CM_STATE_SYN_SENT:
1675 case NES_CM_STATE_ESTABLISHED:
1676 case NES_CM_STATE_MPAREJ_RCVD:
1677 cm_node->tcp_cntxt.rcv_nxt++;
1678 cleanup_retrans_entry(cm_node);
1679 cm_node->state = NES_CM_STATE_LAST_ACK;
1680 send_fin(cm_node, NULL);
1682 case NES_CM_STATE_MPAREQ_SENT:
1683 create_event(cm_node, NES_CM_EVENT_ABORTED);
1684 cm_node->tcp_cntxt.rcv_nxt++;
1685 cleanup_retrans_entry(cm_node);
1686 cm_node->state = NES_CM_STATE_CLOSED;
1687 add_ref_cm_node(cm_node);
1688 send_reset(cm_node, NULL);
1690 case NES_CM_STATE_FIN_WAIT1:
1691 cm_node->tcp_cntxt.rcv_nxt++;
1692 cleanup_retrans_entry(cm_node);
1693 cm_node->state = NES_CM_STATE_CLOSING;
1694 send_ack(cm_node, NULL);
1695 /* Wait for ACK as this is simultaneous close..
1696 * After we receive ACK, do not send anything..
1697 * Just rm the node.. Done.. */
1699 case NES_CM_STATE_FIN_WAIT2:
1700 cm_node->tcp_cntxt.rcv_nxt++;
1701 cleanup_retrans_entry(cm_node);
1702 cm_node->state = NES_CM_STATE_TIME_WAIT;
1703 send_ack(cm_node, NULL);
1704 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1706 case NES_CM_STATE_TIME_WAIT:
1707 cm_node->tcp_cntxt.rcv_nxt++;
1708 cleanup_retrans_entry(cm_node);
1709 cm_node->state = NES_CM_STATE_CLOSED;
1710 rem_ref_cm_node(cm_node->cm_core, cm_node);
1712 case NES_CM_STATE_TSA:
1714 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1715 cm_node, cm_node->state);
1721 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1722 struct tcphdr *tcph)
1725 int reset = 0; /* whether to send reset in case of err.. */
1726 atomic_inc(&cm_resets_recvd);
1727 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1728 " refcnt=%d\n", cm_node, cm_node->state,
1729 atomic_read(&cm_node->ref_count));
1730 cleanup_retrans_entry(cm_node);
1731 switch (cm_node->state) {
1732 case NES_CM_STATE_SYN_SENT:
1733 case NES_CM_STATE_MPAREQ_SENT:
1734 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1735 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1736 cm_node->listener, cm_node->state);
1737 switch (cm_node->mpa_frame_rev) {
1739 cm_node->mpa_frame_rev = IETF_MPA_V1;
1740 /* send a syn and goto syn sent state */
1741 cm_node->state = NES_CM_STATE_SYN_SENT;
1742 if (send_syn(cm_node, 0, NULL)) {
1743 active_open_err(cm_node, skb, reset);
1748 active_open_err(cm_node, skb, reset);
1752 case NES_CM_STATE_MPAREQ_RCVD:
1753 atomic_inc(&cm_node->passive_state);
1754 dev_kfree_skb_any(skb);
1756 case NES_CM_STATE_ESTABLISHED:
1757 case NES_CM_STATE_SYN_RCVD:
1758 case NES_CM_STATE_LISTENING:
1759 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1760 passive_open_err(cm_node, skb, reset);
1762 case NES_CM_STATE_TSA:
1763 active_open_err(cm_node, skb, reset);
1765 case NES_CM_STATE_CLOSED:
1768 case NES_CM_STATE_FIN_WAIT2:
1769 case NES_CM_STATE_FIN_WAIT1:
1770 case NES_CM_STATE_LAST_ACK:
1771 cm_node->cm_id->rem_ref(cm_node->cm_id);
1772 case NES_CM_STATE_TIME_WAIT:
1773 cm_node->state = NES_CM_STATE_CLOSED;
1774 rem_ref_cm_node(cm_node->cm_core, cm_node);
1784 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1787 int datasize = skb->len;
1788 u8 *dataloc = skb->data;
1790 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1793 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1795 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1796 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1797 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1798 "cm_node=%p listener=%p state=%d\n", __func__,
1799 __LINE__, cm_node, cm_node->listener,
1801 active_open_err(cm_node, skb, 1);
1803 passive_open_err(cm_node, skb, 1);
1808 switch (cm_node->state) {
1809 case NES_CM_STATE_ESTABLISHED:
1810 if (res_type == NES_MPA_REQUEST_REJECT)
1811 /*BIG problem as we are receiving the MPA.. So should
1812 * not be REJECT.. This is Passive Open.. We can
1813 * only receive it Reject for Active Open...*/
1815 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1816 type = NES_CM_EVENT_MPA_REQ;
1817 atomic_set(&cm_node->passive_state,
1818 NES_PASSIVE_STATE_INDICATED);
1820 case NES_CM_STATE_MPAREQ_SENT:
1821 cleanup_retrans_entry(cm_node);
1822 if (res_type == NES_MPA_REQUEST_REJECT) {
1823 type = NES_CM_EVENT_MPA_REJECT;
1824 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1826 type = NES_CM_EVENT_CONNECTED;
1827 cm_node->state = NES_CM_STATE_TSA;
1835 dev_kfree_skb_any(skb);
1836 create_event(cm_node, type);
1839 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1841 switch (cm_node->state) {
1842 case NES_CM_STATE_SYN_SENT:
1843 case NES_CM_STATE_MPAREQ_SENT:
1844 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1845 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1846 cm_node->listener, cm_node->state);
1847 active_open_err(cm_node, skb, 1);
1849 case NES_CM_STATE_ESTABLISHED:
1850 case NES_CM_STATE_SYN_RCVD:
1851 passive_open_err(cm_node, skb, 1);
1853 case NES_CM_STATE_TSA:
1859 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1860 struct sk_buff *skb)
1864 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1866 active_open_err(cm_node, skb, 1);
1871 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1872 struct sk_buff *skb)
1877 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1878 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1881 seq = ntohl(tcph->seq);
1882 ack_seq = ntohl(tcph->ack_seq);
1883 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1884 if (ack_seq != loc_seq_num)
1886 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
1889 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1890 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1891 cm_node->listener, cm_node->state);
1892 indicate_pkt_err(cm_node, skb);
1893 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1894 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1901 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1902 * is created with a listener or it may comein as rexmitted packet which in
1903 * that case will be just dropped.
1905 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1906 struct tcphdr *tcph)
1912 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1914 inc_sequence = ntohl(tcph->seq);
1916 switch (cm_node->state) {
1917 case NES_CM_STATE_SYN_SENT:
1918 case NES_CM_STATE_MPAREQ_SENT:
1919 /* Rcvd syn on active open connection*/
1920 active_open_err(cm_node, skb, 1);
1922 case NES_CM_STATE_LISTENING:
1924 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1925 cm_node->listener->backlog) {
1926 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1929 passive_open_err(cm_node, skb, 0);
1932 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1935 passive_open_err(cm_node, skb, 0);
1939 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1940 BUG_ON(cm_node->send_entry);
1941 cm_node->accept_pend = 1;
1942 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1944 cm_node->state = NES_CM_STATE_SYN_RCVD;
1945 send_syn(cm_node, 1, skb);
1947 case NES_CM_STATE_CLOSED:
1948 cleanup_retrans_entry(cm_node);
1949 add_ref_cm_node(cm_node);
1950 send_reset(cm_node, skb);
1952 case NES_CM_STATE_TSA:
1953 case NES_CM_STATE_ESTABLISHED:
1954 case NES_CM_STATE_FIN_WAIT1:
1955 case NES_CM_STATE_FIN_WAIT2:
1956 case NES_CM_STATE_MPAREQ_RCVD:
1957 case NES_CM_STATE_LAST_ACK:
1958 case NES_CM_STATE_CLOSING:
1959 case NES_CM_STATE_UNKNOWN:
1966 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1967 struct tcphdr *tcph)
1973 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1975 inc_sequence = ntohl(tcph->seq);
1976 switch (cm_node->state) {
1977 case NES_CM_STATE_SYN_SENT:
1978 cleanup_retrans_entry(cm_node);
1980 if (check_syn(cm_node, tcph, skb))
1982 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1984 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1986 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1990 cleanup_retrans_entry(cm_node);
1991 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1992 send_mpa_request(cm_node, skb);
1993 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1995 case NES_CM_STATE_MPAREQ_RCVD:
1996 /* passive open, so should not be here */
1997 passive_open_err(cm_node, skb, 1);
1999 case NES_CM_STATE_LISTENING:
2000 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2001 cleanup_retrans_entry(cm_node);
2002 cm_node->state = NES_CM_STATE_CLOSED;
2003 send_reset(cm_node, skb);
2005 case NES_CM_STATE_CLOSED:
2006 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2007 cleanup_retrans_entry(cm_node);
2008 add_ref_cm_node(cm_node);
2009 send_reset(cm_node, skb);
2011 case NES_CM_STATE_ESTABLISHED:
2012 case NES_CM_STATE_FIN_WAIT1:
2013 case NES_CM_STATE_FIN_WAIT2:
2014 case NES_CM_STATE_LAST_ACK:
2015 case NES_CM_STATE_TSA:
2016 case NES_CM_STATE_CLOSING:
2017 case NES_CM_STATE_UNKNOWN:
2018 case NES_CM_STATE_MPAREQ_SENT:
2025 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2026 struct tcphdr *tcph)
2033 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2035 if (check_seq(cm_node, tcph, skb))
2038 skb_pull(skb, tcph->doff << 2);
2039 inc_sequence = ntohl(tcph->seq);
2040 datasize = skb->len;
2041 switch (cm_node->state) {
2042 case NES_CM_STATE_SYN_RCVD:
2044 cleanup_retrans_entry(cm_node);
2045 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2048 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2049 cm_node->state = NES_CM_STATE_ESTABLISHED;
2051 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2052 handle_rcv_mpa(cm_node, skb);
2053 } else { /* rcvd ACK only */
2054 dev_kfree_skb_any(skb);
2057 case NES_CM_STATE_ESTABLISHED:
2059 cleanup_retrans_entry(cm_node);
2061 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2062 handle_rcv_mpa(cm_node, skb);
2067 case NES_CM_STATE_MPAREQ_SENT:
2068 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2070 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2071 handle_rcv_mpa(cm_node, skb);
2072 } else { /* Could be just an ack pkt.. */
2073 dev_kfree_skb_any(skb);
2076 case NES_CM_STATE_LISTENING:
2077 cleanup_retrans_entry(cm_node);
2078 cm_node->state = NES_CM_STATE_CLOSED;
2079 send_reset(cm_node, skb);
2081 case NES_CM_STATE_CLOSED:
2082 cleanup_retrans_entry(cm_node);
2083 add_ref_cm_node(cm_node);
2084 send_reset(cm_node, skb);
2086 case NES_CM_STATE_LAST_ACK:
2087 case NES_CM_STATE_CLOSING:
2088 cleanup_retrans_entry(cm_node);
2089 cm_node->state = NES_CM_STATE_CLOSED;
2090 cm_node->cm_id->rem_ref(cm_node->cm_id);
2091 rem_ref_cm_node(cm_node->cm_core, cm_node);
2094 case NES_CM_STATE_FIN_WAIT1:
2095 cleanup_retrans_entry(cm_node);
2097 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2099 case NES_CM_STATE_SYN_SENT:
2100 case NES_CM_STATE_FIN_WAIT2:
2101 case NES_CM_STATE_TSA:
2102 case NES_CM_STATE_MPAREQ_RCVD:
2103 case NES_CM_STATE_UNKNOWN:
2105 cleanup_retrans_entry(cm_node);
2114 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2115 struct sk_buff *skb, int optionsize, int passive)
2117 u8 *optionsloc = (u8 *)&tcph[1];
2120 if (process_options(cm_node, optionsloc, optionsize,
2122 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2125 passive_open_err(cm_node, skb, 1);
2127 active_open_err(cm_node, skb, 1);
2132 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2133 cm_node->tcp_cntxt.snd_wscale;
2135 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2136 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2141 * active_open_err() will send reset() if flag set..
2142 * It will also send ABORT event.
2144 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2147 cleanup_retrans_entry(cm_node);
2149 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2150 "state=%d\n", cm_node, cm_node->state);
2151 add_ref_cm_node(cm_node);
2152 send_reset(cm_node, skb);
2154 dev_kfree_skb_any(skb);
2157 cm_node->state = NES_CM_STATE_CLOSED;
2158 create_event(cm_node, NES_CM_EVENT_ABORTED);
2162 * passive_open_err() will either do a reset() or will free up the skb and
2163 * remove the cm_node.
2165 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2168 cleanup_retrans_entry(cm_node);
2169 cm_node->state = NES_CM_STATE_CLOSED;
2171 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2172 "cm_node=%p state =%d\n", cm_node, cm_node->state);
2173 send_reset(cm_node, skb);
2175 dev_kfree_skb_any(skb);
2176 rem_ref_cm_node(cm_node->cm_core, cm_node);
2181 * free_retrans_entry() routines assumes that the retrans_list_lock has
2182 * been acquired before calling.
2184 static void free_retrans_entry(struct nes_cm_node *cm_node)
2186 struct nes_timer_entry *send_entry;
2188 send_entry = cm_node->send_entry;
2190 cm_node->send_entry = NULL;
2191 dev_kfree_skb_any(send_entry->skb);
2193 rem_ref_cm_node(cm_node->cm_core, cm_node);
2197 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2199 unsigned long flags;
2201 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2202 free_retrans_entry(cm_node);
2203 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2208 * Returns skb if to be freed, else it will return NULL if already used..
2210 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2211 struct nes_cm_core *cm_core)
2213 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2214 struct tcphdr *tcph = tcp_hdr(skb);
2218 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2220 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2221 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2222 tcph->ack, tcph->rst, tcph->fin);
2225 pkt_type = NES_PKT_TYPE_RST;
2226 } else if (tcph->syn) {
2227 pkt_type = NES_PKT_TYPE_SYN;
2229 pkt_type = NES_PKT_TYPE_SYNACK;
2230 } else if (tcph->ack) {
2231 pkt_type = NES_PKT_TYPE_ACK;
2237 case NES_PKT_TYPE_SYN:
2238 handle_syn_pkt(cm_node, skb, tcph);
2240 case NES_PKT_TYPE_SYNACK:
2241 handle_synack_pkt(cm_node, skb, tcph);
2243 case NES_PKT_TYPE_ACK:
2244 ret = handle_ack_pkt(cm_node, skb, tcph);
2245 if (fin_set && !ret)
2246 handle_fin_pkt(cm_node);
2248 case NES_PKT_TYPE_RST:
2249 handle_rst_pkt(cm_node, skb, tcph);
2252 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2253 handle_fin_pkt(cm_node);
2260 * mini_cm_listen - create a listen node with params
2262 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2263 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2265 struct nes_cm_listener *listener;
2266 unsigned long flags;
2268 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2269 cm_info->loc_addr, cm_info->loc_port);
2271 /* cannot have multiple matching listeners */
2272 listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2273 NES_CM_LISTENER_EITHER_STATE);
2275 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2276 /* find automatically incs ref count ??? */
2277 atomic_dec(&listener->ref_count);
2278 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2283 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2284 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2288 listener->loc_addr = cm_info->loc_addr;
2289 listener->loc_port = cm_info->loc_port;
2290 listener->reused_node = 0;
2292 atomic_set(&listener->ref_count, 1);
2295 /* find already inc'ed the ref count */
2297 listener->reused_node = 1;
2300 listener->cm_id = cm_info->cm_id;
2301 atomic_set(&listener->pend_accepts_cnt, 0);
2302 listener->cm_core = cm_core;
2303 listener->nesvnic = nesvnic;
2304 atomic_inc(&cm_core->node_cnt);
2306 listener->conn_type = cm_info->conn_type;
2307 listener->backlog = cm_info->backlog;
2308 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2310 if (!listener->reused_node) {
2311 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2312 list_add(&listener->list, &cm_core->listen_list.list);
2313 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2314 atomic_inc(&cm_core->listen_node_cnt);
2317 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2318 " listener = %p, backlog = %d, cm_id = %p.\n",
2319 cm_info->loc_addr, cm_info->loc_port,
2320 listener, listener->backlog, listener->cm_id);
2327 * mini_cm_connect - make a connection node with params
2329 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2330 struct nes_vnic *nesvnic, u16 private_data_len,
2331 void *private_data, struct nes_cm_info *cm_info)
2334 struct nes_cm_node *cm_node;
2335 struct nes_cm_listener *loopbackremotelistener;
2336 struct nes_cm_node *loopbackremotenode;
2337 struct nes_cm_info loopback_cm_info;
2340 /* create a CM connection node */
2341 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2345 /* set our node side to client (active) side */
2346 cm_node->tcp_cntxt.client = 1;
2347 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2349 if (cm_info->loc_addr == cm_info->rem_addr) {
2350 loopbackremotelistener = find_listener(cm_core,
2351 cm_node->loc_addr, cm_node->rem_port,
2352 NES_CM_LISTENER_ACTIVE_STATE);
2353 if (loopbackremotelistener == NULL) {
2354 create_event(cm_node, NES_CM_EVENT_ABORTED);
2356 loopback_cm_info = *cm_info;
2357 loopback_cm_info.loc_port = cm_info->rem_port;
2358 loopback_cm_info.rem_port = cm_info->loc_port;
2359 loopback_cm_info.loc_port =
2361 loopback_cm_info.rem_port =
2363 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2364 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2365 &loopback_cm_info, loopbackremotelistener);
2366 if (!loopbackremotenode) {
2367 rem_ref_cm_node(cm_node->cm_core, cm_node);
2370 atomic_inc(&cm_loopbacks);
2371 loopbackremotenode->loopbackpartner = cm_node;
2372 loopbackremotenode->tcp_cntxt.rcv_wscale =
2373 NES_CM_DEFAULT_RCV_WND_SCALE;
2374 cm_node->loopbackpartner = loopbackremotenode;
2375 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2377 loopbackremotenode->mpa_frame_size = private_data_len;
2379 /* we are done handling this state. */
2380 /* set node to a TSA state */
2381 cm_node->state = NES_CM_STATE_TSA;
2382 cm_node->tcp_cntxt.rcv_nxt =
2383 loopbackremotenode->tcp_cntxt.loc_seq_num;
2384 loopbackremotenode->tcp_cntxt.rcv_nxt =
2385 cm_node->tcp_cntxt.loc_seq_num;
2386 cm_node->tcp_cntxt.max_snd_wnd =
2387 loopbackremotenode->tcp_cntxt.rcv_wnd;
2388 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2389 cm_node->tcp_cntxt.rcv_wnd;
2390 cm_node->tcp_cntxt.snd_wnd =
2391 loopbackremotenode->tcp_cntxt.rcv_wnd;
2392 loopbackremotenode->tcp_cntxt.snd_wnd =
2393 cm_node->tcp_cntxt.rcv_wnd;
2394 cm_node->tcp_cntxt.snd_wscale =
2395 loopbackremotenode->tcp_cntxt.rcv_wscale;
2396 loopbackremotenode->tcp_cntxt.snd_wscale =
2397 cm_node->tcp_cntxt.rcv_wscale;
2398 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2399 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2404 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2405 cm_node->mpa_frame_size = private_data_len;
2407 memcpy(start_buff, private_data, private_data_len);
2409 /* send a syn and goto syn sent state */
2410 cm_node->state = NES_CM_STATE_SYN_SENT;
2411 ret = send_syn(cm_node, 0, NULL);
2414 /* error in sending the syn free up the cm_node struct */
2415 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2416 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2417 cm_node->rem_addr, cm_node->rem_port, cm_node,
2419 rem_ref_cm_node(cm_node->cm_core, cm_node);
2424 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2425 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2426 cm_node->rem_addr, cm_node->rem_port, cm_node,
2435 * mini_cm_accept - accept a connection
2436 * This function is never called
2438 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2445 * mini_cm_reject - reject and teardown a connection
2447 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2452 struct nes_cm_event event;
2453 struct iw_cm_id *cm_id = cm_node->cm_id;
2454 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2456 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2457 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2459 if (cm_node->tcp_cntxt.client)
2461 cleanup_retrans_entry(cm_node);
2464 passive_state = atomic_add_return(1, &cm_node->passive_state);
2465 if (passive_state == NES_SEND_RESET_EVENT) {
2466 cm_node->state = NES_CM_STATE_CLOSED;
2467 rem_ref_cm_node(cm_core, cm_node);
2469 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2470 rem_ref_cm_node(cm_core, cm_node);
2472 ret = send_mpa_reject(cm_node);
2474 cm_node->state = NES_CM_STATE_CLOSED;
2475 err = send_reset(cm_node, NULL);
2479 cm_id->add_ref(cm_id);
2484 cm_node->cm_id = NULL;
2485 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2486 rem_ref_cm_node(cm_core, cm_node);
2487 rem_ref_cm_node(cm_core, loopback);
2489 event.cm_node = loopback;
2490 event.cm_info.rem_addr = loopback->rem_addr;
2491 event.cm_info.loc_addr = loopback->loc_addr;
2492 event.cm_info.rem_port = loopback->rem_port;
2493 event.cm_info.loc_port = loopback->loc_port;
2494 event.cm_info.cm_id = loopback->cm_id;
2495 cm_event_mpa_reject(&event);
2496 rem_ref_cm_node(cm_core, cm_node);
2497 loopback->state = NES_CM_STATE_CLOSING;
2499 cm_id = loopback->cm_id;
2500 rem_ref_cm_node(cm_core, loopback);
2501 cm_id->rem_ref(cm_id);
2512 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2516 if (!cm_core || !cm_node)
2519 switch (cm_node->state) {
2520 case NES_CM_STATE_SYN_RCVD:
2521 case NES_CM_STATE_SYN_SENT:
2522 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2523 case NES_CM_STATE_ESTABLISHED:
2524 case NES_CM_STATE_ACCEPTING:
2525 case NES_CM_STATE_MPAREQ_SENT:
2526 case NES_CM_STATE_MPAREQ_RCVD:
2527 cleanup_retrans_entry(cm_node);
2528 send_reset(cm_node, NULL);
2530 case NES_CM_STATE_CLOSE_WAIT:
2531 cm_node->state = NES_CM_STATE_LAST_ACK;
2532 send_fin(cm_node, NULL);
2534 case NES_CM_STATE_FIN_WAIT1:
2535 case NES_CM_STATE_FIN_WAIT2:
2536 case NES_CM_STATE_LAST_ACK:
2537 case NES_CM_STATE_TIME_WAIT:
2538 case NES_CM_STATE_CLOSING:
2541 case NES_CM_STATE_LISTENING:
2542 cleanup_retrans_entry(cm_node);
2543 send_reset(cm_node, NULL);
2545 case NES_CM_STATE_MPAREJ_RCVD:
2546 case NES_CM_STATE_UNKNOWN:
2547 case NES_CM_STATE_INITED:
2548 case NES_CM_STATE_CLOSED:
2549 case NES_CM_STATE_LISTENER_DESTROYED:
2550 ret = rem_ref_cm_node(cm_core, cm_node);
2552 case NES_CM_STATE_TSA:
2553 if (cm_node->send_entry)
2554 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2555 "send_entry=%p\n", cm_node->send_entry);
2556 ret = rem_ref_cm_node(cm_core, cm_node);
2564 * recv_pkt - recv an ETHERNET packet, and process it through CM
2565 * node state machine
2567 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2568 struct nes_vnic *nesvnic, struct sk_buff *skb)
2570 struct nes_cm_node *cm_node = NULL;
2571 struct nes_cm_listener *listener = NULL;
2573 struct tcphdr *tcph;
2574 struct nes_cm_info nfo;
2575 int skb_handled = 1;
2576 __be32 tmp_daddr, tmp_saddr;
2580 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2583 iph = (struct iphdr *)skb->data;
2584 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2586 nfo.loc_addr = ntohl(iph->daddr);
2587 nfo.loc_port = ntohs(tcph->dest);
2588 nfo.rem_addr = ntohl(iph->saddr);
2589 nfo.rem_port = ntohs(tcph->source);
2591 tmp_daddr = cpu_to_be32(iph->daddr);
2592 tmp_saddr = cpu_to_be32(iph->saddr);
2594 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2595 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2598 cm_node = find_node(cm_core,
2599 nfo.rem_port, nfo.rem_addr,
2600 nfo.loc_port, nfo.loc_addr);
2603 /* Only type of packet accepted are for */
2604 /* the PASSIVE open (syn only) */
2605 if ((!tcph->syn) || (tcph->ack)) {
2609 listener = find_listener(cm_core, nfo.loc_addr,
2611 NES_CM_LISTENER_ACTIVE_STATE);
2615 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2619 nfo.cm_id = listener->cm_id;
2620 nfo.conn_type = listener->conn_type;
2621 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2624 nes_debug(NES_DBG_CM, "Unable to allocate "
2626 cm_packets_dropped++;
2627 atomic_dec(&listener->ref_count);
2628 dev_kfree_skb_any(skb);
2631 if (!tcph->rst && !tcph->fin) {
2632 cm_node->state = NES_CM_STATE_LISTENING;
2634 cm_packets_dropped++;
2635 rem_ref_cm_node(cm_core, cm_node);
2636 dev_kfree_skb_any(skb);
2639 add_ref_cm_node(cm_node);
2640 } else if (cm_node->state == NES_CM_STATE_TSA) {
2641 if (cm_node->nesqp->pau_mode)
2642 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2644 rem_ref_cm_node(cm_core, cm_node);
2645 atomic_inc(&cm_accel_dropped_pkts);
2646 dev_kfree_skb_any(skb);
2650 skb_reset_network_header(skb);
2651 skb_set_transport_header(skb, sizeof(*tcph));
2652 skb->len = ntohs(iph->tot_len);
2653 process_packet(cm_node, skb, cm_core);
2654 rem_ref_cm_node(cm_core, cm_node);
2661 * nes_cm_alloc_core - allocate a top level instance of a cm core
2663 static struct nes_cm_core *nes_cm_alloc_core(void)
2665 struct nes_cm_core *cm_core;
2667 /* setup the CM core */
2668 /* alloc top level core control structure */
2669 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2673 INIT_LIST_HEAD(&cm_core->connected_nodes);
2674 init_timer(&cm_core->tcp_timer);
2675 cm_core->tcp_timer.function = nes_cm_timer_tick;
2677 cm_core->mtu = NES_CM_DEFAULT_MTU;
2678 cm_core->state = NES_CM_STATE_INITED;
2679 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2681 atomic_set(&cm_core->events_posted, 0);
2683 cm_core->api = &nes_cm_api;
2685 spin_lock_init(&cm_core->ht_lock);
2686 spin_lock_init(&cm_core->listen_list_lock);
2688 INIT_LIST_HEAD(&cm_core->listen_list.list);
2690 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2692 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2693 cm_core->event_wq = alloc_ordered_workqueue("nesewq", 0);
2694 if (!cm_core->event_wq)
2695 goto out_free_cmcore;
2696 cm_core->post_event = nes_cm_post_event;
2697 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2698 cm_core->disconn_wq = alloc_ordered_workqueue("nesdwq", 0);
2699 if (!cm_core->disconn_wq)
2702 print_core(cm_core);
2706 destroy_workqueue(cm_core->event_wq);
2714 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2716 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2718 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2725 if (timer_pending(&cm_core->tcp_timer))
2726 del_timer(&cm_core->tcp_timer);
2728 destroy_workqueue(cm_core->event_wq);
2729 destroy_workqueue(cm_core->disconn_wq);
2730 nes_debug(NES_DBG_CM, "\n");
2740 static int mini_cm_get(struct nes_cm_core *cm_core)
2742 return cm_core->state;
2749 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2754 case NES_CM_SET_PKT_SIZE:
2755 cm_core->mtu = value;
2757 case NES_CM_SET_FREE_PKT_Q_SIZE:
2758 cm_core->free_tx_pkt_max = value;
2761 /* unknown set option */
2770 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2771 * successfully exchanged when this is called
2773 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2780 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2781 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2782 NES_QPCONTEXT_MISC_DROS);
2784 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2785 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2787 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2789 nesqp->nesqp_context->misc2 |= cpu_to_le32(
2790 cm_node->tos << NES_QPCONTEXT_MISC2_TOS_SHIFT);
2792 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2794 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2795 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2797 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2798 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2799 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2801 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2802 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2803 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2805 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2806 nesqp->nesqp_context->ts_recent = 0;
2807 nesqp->nesqp_context->ts_age = 0;
2808 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2809 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2810 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2811 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2812 cm_node->tcp_cntxt.rcv_wscale);
2813 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2814 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2815 nesqp->nesqp_context->srtt = 0;
2816 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2817 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2818 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2819 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2820 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2821 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2823 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2824 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2825 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2826 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2827 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2828 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2829 le32_to_cpu(nesqp->nesqp_context->misc));
2830 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2831 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2832 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2834 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2835 cm_node->state = NES_CM_STATE_TSA;
2844 int nes_cm_disconn(struct nes_qp *nesqp)
2846 struct disconn_work *work;
2848 work = kzalloc(sizeof *work, GFP_ATOMIC);
2850 return -ENOMEM; /* Timer will clean up */
2852 nes_add_ref(&nesqp->ibqp);
2853 work->nesqp = nesqp;
2854 INIT_WORK(&work->work, nes_disconnect_worker);
2855 queue_work(g_cm_core->disconn_wq, &work->work);
2861 * nes_disconnect_worker
2863 static void nes_disconnect_worker(struct work_struct *work)
2865 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2866 struct nes_qp *nesqp = dwork->nesqp;
2869 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2870 nesqp->last_aeq, nesqp->hwqp.qp_id);
2871 nes_cm_disconn_true(nesqp);
2872 nes_rem_ref(&nesqp->ibqp);
2877 * nes_cm_disconn_true
2879 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2881 unsigned long flags;
2883 struct iw_cm_id *cm_id;
2884 struct iw_cm_event cm_event;
2885 struct nes_vnic *nesvnic;
2887 u8 original_hw_tcp_state;
2888 u8 original_ibqp_state;
2889 int disconn_status = 0;
2890 int issue_disconn = 0;
2891 int issue_close = 0;
2892 int issue_flush = 0;
2893 u32 flush_q = NES_CQP_FLUSH_RQ;
2894 struct ib_event ibevent;
2897 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2901 spin_lock_irqsave(&nesqp->lock, flags);
2902 cm_id = nesqp->cm_id;
2903 /* make sure we havent already closed this connection */
2905 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2907 spin_unlock_irqrestore(&nesqp->lock, flags);
2911 nesvnic = to_nesvnic(nesqp->ibqp.device);
2912 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2914 original_hw_tcp_state = nesqp->hw_tcp_state;
2915 original_ibqp_state = nesqp->ibqp_state;
2916 last_ae = nesqp->last_aeq;
2918 if (nesqp->term_flags) {
2921 nesqp->cm_id = NULL;
2922 del_timer(&nesqp->terminate_timer);
2923 if (nesqp->flush_issued == 0) {
2924 nesqp->flush_issued = 1;
2927 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2928 ((original_ibqp_state == IB_QPS_RTS) &&
2929 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2931 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2932 disconn_status = -ECONNRESET;
2935 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2936 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2937 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2938 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2940 nesqp->cm_id = NULL;
2941 if (nesqp->flush_issued == 0) {
2942 nesqp->flush_issued = 1;
2947 spin_unlock_irqrestore(&nesqp->lock, flags);
2949 if ((issue_flush) && (nesqp->destroyed == 0)) {
2950 /* Flush the queue(s) */
2951 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2952 flush_q |= NES_CQP_FLUSH_SQ;
2953 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2955 if (nesqp->term_flags) {
2956 ibevent.device = nesqp->ibqp.device;
2957 ibevent.event = nesqp->terminate_eventtype;
2958 ibevent.element.qp = &nesqp->ibqp;
2959 if (nesqp->ibqp.event_handler)
2960 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2964 if ((cm_id) && (cm_id->event_handler)) {
2965 if (issue_disconn) {
2966 atomic_inc(&cm_disconnects);
2967 cm_event.event = IW_CM_EVENT_DISCONNECT;
2968 cm_event.status = disconn_status;
2969 cm_event.local_addr = cm_id->m_local_addr;
2970 cm_event.remote_addr = cm_id->m_remote_addr;
2971 cm_event.private_data = NULL;
2972 cm_event.private_data_len = 0;
2974 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2975 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2976 "cm_id = %p, refcount = %u.\n",
2977 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2978 nesqp->hwqp.sq_tail, cm_id,
2979 atomic_read(&nesqp->refcount));
2981 ret = cm_id->event_handler(cm_id, &cm_event);
2983 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2984 "returned, ret=%d\n", ret);
2988 atomic_inc(&cm_closes);
2989 nes_disconnect(nesqp, 1);
2991 cm_id->provider_data = nesqp;
2992 /* Send up the close complete event */
2993 cm_event.event = IW_CM_EVENT_CLOSE;
2994 cm_event.status = 0;
2995 cm_event.provider_data = cm_id->provider_data;
2996 cm_event.local_addr = cm_id->m_local_addr;
2997 cm_event.remote_addr = cm_id->m_remote_addr;
2998 cm_event.private_data = NULL;
2999 cm_event.private_data_len = 0;
3001 ret = cm_id->event_handler(cm_id, &cm_event);
3003 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3005 cm_id->rem_ref(cm_id);
3016 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3019 struct nes_vnic *nesvnic;
3020 struct nes_device *nesdev;
3021 struct nes_ib_device *nesibdev;
3023 nesvnic = to_nesvnic(nesqp->ibqp.device);
3027 nesdev = nesvnic->nesdev;
3028 nesibdev = nesvnic->nesibdev;
3030 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3031 netdev_refcnt_read(nesvnic->netdev));
3033 if (nesqp->active_conn) {
3035 /* indicate this connection is NOT active */
3036 nesqp->active_conn = 0;
3038 /* Need to free the Last Streaming Mode Message */
3039 if (nesqp->ietf_frame) {
3041 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3042 pci_free_consistent(nesdev->pcidev,
3043 nesqp->private_data_len + nesqp->ietf_frame_size,
3044 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3048 /* close the CM node down if it is still active */
3049 if (nesqp->cm_node) {
3050 nes_debug(NES_DBG_CM, "Call close API\n");
3052 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3062 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3066 struct nes_qp *nesqp;
3067 struct nes_vnic *nesvnic;
3068 struct nes_device *nesdev;
3069 struct nes_cm_node *cm_node;
3070 struct nes_adapter *adapter;
3071 struct ib_qp_attr attr;
3072 struct iw_cm_event cm_event;
3073 struct nes_hw_qp_wqe *wqe;
3074 struct nes_v4_quad nes_quad;
3078 struct nes_ib_device *nesibdev;
3079 struct ib_mr *ibmr = NULL;
3080 struct nes_pd *nespd;
3082 u8 mpa_frame_offset = 0;
3083 struct ietf_mpa_v2 *mpa_v2_frame;
3085 u8 *start_ptr = &start_addr;
3086 u8 **start_buff = &start_ptr;
3088 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3089 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3091 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3095 /* get all our handles */
3096 nesqp = to_nesqp(ibqp);
3097 nesvnic = to_nesvnic(nesqp->ibqp.device);
3098 nesdev = nesvnic->nesdev;
3099 adapter = nesdev->nesadapter;
3101 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3102 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3103 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3104 nesvnic->netdev->name);
3106 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3107 if (cm_node->loopbackpartner)
3108 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3109 rem_ref_cm_node(cm_node->cm_core, cm_node);
3113 passive_state = atomic_add_return(1, &cm_node->passive_state);
3114 if (passive_state == NES_SEND_RESET_EVENT) {
3115 rem_ref_cm_node(cm_node->cm_core, cm_node);
3118 /* associate the node with the QP */
3119 nesqp->cm_node = (void *)cm_node;
3120 cm_node->nesqp = nesqp;
3123 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3124 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3125 atomic_inc(&cm_accepts);
3127 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3128 netdev_refcnt_read(nesvnic->netdev));
3130 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3131 /* allocate the ietf frame and space for private data */
3132 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3133 nesqp->ietf_frame_size + conn_param->private_data_len,
3134 &nesqp->ietf_frame_pbase);
3136 if (!nesqp->ietf_frame) {
3137 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3140 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3142 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3143 mpa_frame_offset = 4;
3145 if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3146 cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3147 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3150 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3151 conn_param->private_data_len);
3153 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3154 nesqp->private_data_len = conn_param->private_data_len;
3156 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3157 wqe = &nesqp->hwqp.sq_vbase[0];
3159 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3160 u64temp = (unsigned long)nesqp;
3161 nesibdev = nesvnic->nesibdev;
3162 nespd = nesqp->nespd;
3163 tagged_offset = (u64)(unsigned long)*start_buff;
3164 ibmr = nes_reg_phys_mr(&nespd->ibpd,
3165 nesqp->ietf_frame_pbase + mpa_frame_offset,
3166 buff_len, IB_ACCESS_LOCAL_WRITE,
3169 nes_debug(NES_DBG_CM, "Unable to register memory region"
3170 "for lSMM for cm_node = %p \n",
3172 pci_free_consistent(nesdev->pcidev,
3173 nesqp->private_data_len + nesqp->ietf_frame_size,
3174 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3175 return PTR_ERR(ibmr);
3178 ibmr->pd = &nespd->ibpd;
3179 ibmr->device = nespd->ibpd.device;
3180 nesqp->lsmm_mr = ibmr;
3182 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3183 set_wqe_64bit_value(wqe->wqe_words,
3184 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3186 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3187 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3188 NES_IWARP_SQ_WQE_WRPDU);
3189 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3190 cpu_to_le32(buff_len);
3191 set_wqe_64bit_value(wqe->wqe_words,
3192 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3193 (u64)(unsigned long)(*start_buff));
3194 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3195 cpu_to_le32(buff_len);
3196 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3197 if (nesqp->sq_kmapped) {
3198 nesqp->sq_kmapped = 0;
3199 kunmap(nesqp->page);
3202 nesqp->nesqp_context->ird_ord_sizes |=
3203 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3204 NES_QPCONTEXT_ORDIRD_WRPDU);
3206 nesqp->nesqp_context->ird_ord_sizes |=
3207 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3209 nesqp->skip_lsmm = 1;
3211 /* Cache the cm_id in the qp */
3212 nesqp->cm_id = cm_id;
3213 cm_node->cm_id = cm_id;
3215 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3216 cm_id->provider_data = nesqp;
3217 nesqp->active_conn = 0;
3219 if (cm_node->state == NES_CM_STATE_TSA)
3220 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3223 nes_cm_init_tsa_conn(nesqp, cm_node);
3225 nesqp->nesqp_context->tcpPorts[0] =
3226 cpu_to_le16(cm_node->loc_port);
3227 nesqp->nesqp_context->tcpPorts[1] =
3228 cpu_to_le16(cm_node->rem_port);
3230 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->rem_addr);
3232 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3233 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3234 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3236 nesqp->nesqp_context->arp_index_vlan |=
3237 cpu_to_le32(nes_arp_table(nesdev,
3238 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3239 NES_ARP_RESOLVE) << 16);
3241 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3242 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3244 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3246 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3247 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3248 nesqp->nesqp_context->ird_ord_sizes |=
3249 cpu_to_le32((u32)cm_node->ord_size);
3251 memset(&nes_quad, 0, sizeof(nes_quad));
3252 nes_quad.DstIpAdrIndex =
3253 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3254 nes_quad.SrcIpadr = htonl(cm_node->rem_addr);
3255 nes_quad.TcpPorts[0] = htons(cm_node->rem_port);
3256 nes_quad.TcpPorts[1] = htons(cm_node->loc_port);
3258 /* Produce hash key */
3259 crc_value = get_crc_value(&nes_quad);
3260 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3261 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3262 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3264 nesqp->hte_index &= adapter->hte_index_mask;
3265 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3267 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3269 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3270 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3271 "private data length=%u.\n", nesqp->hwqp.qp_id,
3272 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3273 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3274 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3275 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3278 /* notify OF layer that accept event was successful */
3279 cm_id->add_ref(cm_id);
3280 nes_add_ref(&nesqp->ibqp);
3282 cm_event.event = IW_CM_EVENT_ESTABLISHED;
3283 cm_event.status = 0;
3284 cm_event.provider_data = (void *)nesqp;
3285 cm_event.local_addr = cm_id->m_local_addr;
3286 cm_event.remote_addr = cm_id->m_remote_addr;
3287 cm_event.private_data = NULL;
3288 cm_event.private_data_len = 0;
3289 cm_event.ird = cm_node->ird_size;
3290 cm_event.ord = cm_node->ord_size;
3292 ret = cm_id->event_handler(cm_id, &cm_event);
3293 attr.qp_state = IB_QPS_RTS;
3294 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3295 if (cm_node->loopbackpartner) {
3296 cm_node->loopbackpartner->mpa_frame_size =
3297 nesqp->private_data_len;
3298 /* copy entire MPA frame to our cm_node's frame */
3299 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3300 conn_param->private_data, conn_param->private_data_len);
3301 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3304 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3305 "ret=%d\n", __func__, __LINE__, ret);
3314 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3316 struct nes_cm_node *cm_node;
3317 struct nes_cm_node *loopback;
3318 struct nes_cm_core *cm_core;
3321 atomic_inc(&cm_rejects);
3322 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3323 loopback = cm_node->loopbackpartner;
3324 cm_core = cm_node->cm_core;
3325 cm_node->cm_id = cm_id;
3327 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3331 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3332 loopback->mpa_frame.priv_data_len = pdata_len;
3333 loopback->mpa_frame_size = pdata_len;
3335 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3336 cm_node->mpa_frame_size = pdata_len;
3337 memcpy(start_buff, pdata, pdata_len);
3339 return cm_core->api->reject(cm_core, cm_node);
3345 * setup and launch cm connect node
3347 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3350 struct nes_qp *nesqp;
3351 struct nes_vnic *nesvnic;
3352 struct nes_device *nesdev;
3353 struct nes_cm_node *cm_node;
3354 struct nes_cm_info cm_info;
3356 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3357 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3359 if (cm_id->remote_addr.ss_family != AF_INET)
3361 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3364 nesqp = to_nesqp(ibqp);
3367 nesvnic = to_nesvnic(nesqp->ibqp.device);
3370 nesdev = nesvnic->nesdev;
3374 if (!laddr->sin_port || !raddr->sin_port)
3377 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3378 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3379 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3380 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3381 ntohs(laddr->sin_port));
3383 atomic_inc(&cm_connects);
3384 nesqp->active_conn = 1;
3386 /* cache the cm_id in the qp */
3387 nesqp->cm_id = cm_id;
3388 cm_id->provider_data = nesqp;
3389 nesqp->private_data_len = conn_param->private_data_len;
3391 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3392 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3393 conn_param->private_data_len);
3395 /* set up the connection params for the node */
3396 cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3397 cm_info.loc_port = ntohs(laddr->sin_port);
3398 cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3399 cm_info.rem_port = ntohs(raddr->sin_port);
3400 cm_info.cm_id = cm_id;
3401 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3403 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3404 nes_manage_apbvt(nesvnic, cm_info.loc_port,
3405 PCI_FUNC(nesdev->pcidev->devfn),
3406 NES_MANAGE_APBVT_ADD);
3410 cm_id->add_ref(cm_id);
3412 /* create a connect CM node connection */
3413 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3414 conn_param->private_data_len, (void *)conn_param->private_data,
3418 nes_manage_apbvt(nesvnic, cm_info.loc_port,
3419 PCI_FUNC(nesdev->pcidev->devfn),
3420 NES_MANAGE_APBVT_DEL);
3422 nes_debug(NES_DBG_NLMSG, "Delete loc_port = %04X\n",
3424 cm_id->rem_ref(cm_id);
3428 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3429 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3430 cm_node->ord_size == 0)
3431 cm_node->ord_size = 1;
3433 cm_node->apbvt_set = apbvt_set;
3434 cm_node->tos = cm_id->tos;
3435 nesqp->cm_node = cm_node;
3436 cm_node->nesqp = nesqp;
3437 nes_add_ref(&nesqp->ibqp);
3446 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3448 struct nes_vnic *nesvnic;
3449 struct nes_cm_listener *cm_node;
3450 struct nes_cm_info cm_info;
3452 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3454 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3455 cm_id, ntohs(laddr->sin_port));
3457 if (cm_id->m_local_addr.ss_family != AF_INET)
3459 nesvnic = to_nesvnic(cm_id->device);
3463 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3464 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3466 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3467 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3469 /* setup listen params in our api call struct */
3470 cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3471 cm_info.loc_port = ntohs(laddr->sin_port);
3472 cm_info.backlog = backlog;
3473 cm_info.cm_id = cm_id;
3475 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3477 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3479 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3480 __func__, __LINE__);
3484 cm_id->provider_data = cm_node;
3485 cm_node->tos = cm_id->tos;
3487 if (!cm_node->reused_node) {
3488 err = nes_manage_apbvt(nesvnic, cm_node->loc_port,
3489 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3490 NES_MANAGE_APBVT_ADD);
3492 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3494 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3497 atomic_inc(&cm_listens_created);
3500 cm_id->add_ref(cm_id);
3501 cm_id->provider_data = (void *)cm_node;
3509 * nes_destroy_listen
3511 int nes_destroy_listen(struct iw_cm_id *cm_id)
3513 if (cm_id->provider_data)
3514 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3516 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3518 cm_id->rem_ref(cm_id);
3527 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3531 cm_packets_received++;
3532 if ((g_cm_core) && (g_cm_core->api))
3533 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3535 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3536 " cm is not setup properly.\n");
3544 * Start and init a cm core module
3546 int nes_cm_start(void)
3548 nes_debug(NES_DBG_CM, "\n");
3549 /* create the primary CM core, pass this handle to subsequent core inits */
3550 g_cm_core = nes_cm_alloc_core();
3560 * stop and dealloc all cm core instances
3562 int nes_cm_stop(void)
3564 g_cm_core->api->destroy_cm_core(g_cm_core);
3570 * cm_event_connected
3571 * handle a connected event, setup QPs and HW
3573 static void cm_event_connected(struct nes_cm_event *event)
3575 struct nes_qp *nesqp;
3576 struct nes_vnic *nesvnic;
3577 struct nes_device *nesdev;
3578 struct nes_cm_node *cm_node;
3579 struct nes_adapter *nesadapter;
3580 struct ib_qp_attr attr;
3581 struct iw_cm_id *cm_id;
3582 struct iw_cm_event cm_event;
3583 struct nes_v4_quad nes_quad;
3586 struct sockaddr_in *laddr;
3587 struct sockaddr_in *raddr;
3588 struct sockaddr_in *cm_event_laddr;
3590 /* get all our handles */
3591 cm_node = event->cm_node;
3592 cm_id = cm_node->cm_id;
3593 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3594 nesqp = (struct nes_qp *)cm_id->provider_data;
3595 nesvnic = to_nesvnic(nesqp->ibqp.device);
3596 nesdev = nesvnic->nesdev;
3597 nesadapter = nesdev->nesadapter;
3598 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3599 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3600 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3602 if (nesqp->destroyed)
3604 atomic_inc(&cm_connecteds);
3605 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3606 " local port 0x%04X. jiffies = %lu.\n",
3607 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3608 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3610 nes_cm_init_tsa_conn(nesqp, cm_node);
3612 /* set the QP tsa context */
3613 nesqp->nesqp_context->tcpPorts[0] =
3614 cpu_to_le16(cm_node->loc_port);
3615 nesqp->nesqp_context->tcpPorts[1] =
3616 cpu_to_le16(cm_node->rem_port);
3617 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->rem_addr);
3619 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3620 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3621 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3622 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3623 nes_arp_table(nesdev,
3624 le32_to_cpu(nesqp->nesqp_context->ip0),
3625 NULL, NES_ARP_RESOLVE) << 16);
3626 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3627 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3628 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3629 nesqp->nesqp_context->ird_ord_sizes |=
3630 cpu_to_le32((u32)1 <<
3631 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3632 nesqp->nesqp_context->ird_ord_sizes |=
3633 cpu_to_le32((u32)cm_node->ord_size);
3635 /* Adjust tail for not having a LSMM */
3636 /*nesqp->hwqp.sq_tail = 1;*/
3638 build_rdma0_msg(cm_node, &nesqp);
3640 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3641 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3643 memset(&nes_quad, 0, sizeof(nes_quad));
3645 nes_quad.DstIpAdrIndex =
3646 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3647 nes_quad.SrcIpadr = htonl(cm_node->rem_addr);
3648 nes_quad.TcpPorts[0] = htons(cm_node->rem_port);
3649 nes_quad.TcpPorts[1] = htons(cm_node->loc_port);
3651 /* Produce hash key */
3652 crc_value = get_crc_value(&nes_quad);
3653 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3654 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3655 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3657 nesqp->hte_index &= nesadapter->hte_index_mask;
3658 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3660 nesqp->ietf_frame = &cm_node->mpa_frame;
3661 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3662 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3664 /* notify OF layer we successfully created the requested connection */
3665 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3666 cm_event.status = 0;
3667 cm_event.provider_data = cm_id->provider_data;
3668 cm_event_laddr->sin_family = AF_INET;
3669 cm_event_laddr->sin_port = laddr->sin_port;
3670 cm_event.remote_addr = cm_id->m_remote_addr;
3672 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3673 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3674 cm_event.ird = cm_node->ird_size;
3675 cm_event.ord = cm_node->ord_size;
3677 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3678 ret = cm_id->event_handler(cm_id, &cm_event);
3679 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3682 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3683 "ret=%d\n", __func__, __LINE__, ret);
3684 attr.qp_state = IB_QPS_RTS;
3685 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3687 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3688 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3695 * cm_event_connect_error
3697 static void cm_event_connect_error(struct nes_cm_event *event)
3699 struct nes_qp *nesqp;
3700 struct iw_cm_id *cm_id;
3701 struct iw_cm_event cm_event;
3702 /* struct nes_cm_info cm_info; */
3705 if (!event->cm_node)
3708 cm_id = event->cm_node->cm_id;
3712 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3713 nesqp = cm_id->provider_data;
3718 /* notify OF layer about this connection error event */
3719 /* cm_id->rem_ref(cm_id); */
3720 nesqp->cm_id = NULL;
3721 cm_id->provider_data = NULL;
3722 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3723 cm_event.status = -ECONNRESET;
3724 cm_event.provider_data = cm_id->provider_data;
3725 cm_event.local_addr = cm_id->m_local_addr;
3726 cm_event.remote_addr = cm_id->m_remote_addr;
3727 cm_event.private_data = NULL;
3728 cm_event.private_data_len = 0;
3730 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3732 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3733 &cm_event.local_addr;
3734 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3735 &cm_event.remote_addr;
3736 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3737 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3741 ret = cm_id->event_handler(cm_id, &cm_event);
3742 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3744 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3745 "ret=%d\n", __func__, __LINE__, ret);
3746 cm_id->rem_ref(cm_id);
3748 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3756 static void cm_event_reset(struct nes_cm_event *event)
3758 struct nes_qp *nesqp;
3759 struct iw_cm_id *cm_id;
3760 struct iw_cm_event cm_event;
3761 /* struct nes_cm_info cm_info; */
3764 if (!event->cm_node)
3767 if (!event->cm_node->cm_id)
3770 cm_id = event->cm_node->cm_id;
3772 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3773 nesqp = cm_id->provider_data;
3777 nesqp->cm_id = NULL;
3778 /* cm_id->provider_data = NULL; */
3779 cm_event.event = IW_CM_EVENT_DISCONNECT;
3780 cm_event.status = -ECONNRESET;
3781 cm_event.provider_data = cm_id->provider_data;
3782 cm_event.local_addr = cm_id->m_local_addr;
3783 cm_event.remote_addr = cm_id->m_remote_addr;
3784 cm_event.private_data = NULL;
3785 cm_event.private_data_len = 0;
3787 cm_id->add_ref(cm_id);
3788 ret = cm_id->event_handler(cm_id, &cm_event);
3789 atomic_inc(&cm_closes);
3790 cm_event.event = IW_CM_EVENT_CLOSE;
3791 cm_event.status = 0;
3792 cm_event.provider_data = cm_id->provider_data;
3793 cm_event.local_addr = cm_id->m_local_addr;
3794 cm_event.remote_addr = cm_id->m_remote_addr;
3795 cm_event.private_data = NULL;
3796 cm_event.private_data_len = 0;
3797 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3798 ret = cm_id->event_handler(cm_id, &cm_event);
3800 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3803 /* notify OF layer about this connection error event */
3804 cm_id->rem_ref(cm_id);
3813 static void cm_event_mpa_req(struct nes_cm_event *event)
3815 struct iw_cm_id *cm_id;
3816 struct iw_cm_event cm_event;
3818 struct nes_cm_node *cm_node;
3819 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3820 &cm_event.local_addr;
3821 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3822 &cm_event.remote_addr;
3824 cm_node = event->cm_node;
3827 cm_id = cm_node->cm_id;
3829 atomic_inc(&cm_connect_reqs);
3830 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3831 cm_node, cm_id, jiffies);
3833 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3834 cm_event.status = 0;
3835 cm_event.provider_data = (void *)cm_node;
3837 cm_event_laddr->sin_family = AF_INET;
3838 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3839 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3841 cm_event_raddr->sin_family = AF_INET;
3842 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3843 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3844 cm_event.private_data = cm_node->mpa_frame_buf;
3845 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3846 if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
3847 cm_event.ird = NES_MAX_IRD;
3848 cm_event.ord = NES_MAX_ORD;
3850 cm_event.ird = cm_node->ird_size;
3851 cm_event.ord = cm_node->ord_size;
3854 ret = cm_id->event_handler(cm_id, &cm_event);
3856 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3857 __func__, __LINE__, ret);
3862 static void cm_event_mpa_reject(struct nes_cm_event *event)
3864 struct iw_cm_id *cm_id;
3865 struct iw_cm_event cm_event;
3866 struct nes_cm_node *cm_node;
3868 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3869 &cm_event.local_addr;
3870 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3871 &cm_event.remote_addr;
3873 cm_node = event->cm_node;
3876 cm_id = cm_node->cm_id;
3878 atomic_inc(&cm_connect_reqs);
3879 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3880 cm_node, cm_id, jiffies);
3882 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3883 cm_event.status = -ECONNREFUSED;
3884 cm_event.provider_data = cm_id->provider_data;
3886 cm_event_laddr->sin_family = AF_INET;
3887 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3888 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3890 cm_event_raddr->sin_family = AF_INET;
3891 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3892 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3894 cm_event.private_data = cm_node->mpa_frame_buf;
3895 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3897 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3898 "remove_addr=%08x\n",
3899 cm_event_laddr->sin_addr.s_addr,
3900 cm_event_raddr->sin_addr.s_addr);
3902 ret = cm_id->event_handler(cm_id, &cm_event);
3904 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3905 __func__, __LINE__, ret);
3911 static void nes_cm_event_handler(struct work_struct *);
3915 * post an event to the cm event handler
3917 static int nes_cm_post_event(struct nes_cm_event *event)
3919 atomic_inc(&event->cm_node->cm_core->events_posted);
3920 add_ref_cm_node(event->cm_node);
3921 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3922 INIT_WORK(&event->event_work, nes_cm_event_handler);
3923 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3924 event->cm_node, event);
3926 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3928 nes_debug(NES_DBG_CM, "Exit\n");
3934 * nes_cm_event_handler
3935 * worker function to handle cm events
3936 * will free instance of nes_cm_event
3938 static void nes_cm_event_handler(struct work_struct *work)
3940 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3942 struct nes_cm_core *cm_core;
3944 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3947 cm_core = event->cm_node->cm_core;
3948 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3949 event, event->type, atomic_read(&cm_core->events_posted));
3951 switch (event->type) {
3952 case NES_CM_EVENT_MPA_REQ:
3953 cm_event_mpa_req(event);
3954 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3957 case NES_CM_EVENT_RESET:
3958 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3960 cm_event_reset(event);
3962 case NES_CM_EVENT_CONNECTED:
3963 if ((!event->cm_node->cm_id) ||
3964 (event->cm_node->state != NES_CM_STATE_TSA))
3966 cm_event_connected(event);
3967 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3969 case NES_CM_EVENT_MPA_REJECT:
3970 if ((!event->cm_node->cm_id) ||
3971 (event->cm_node->state == NES_CM_STATE_TSA))
3973 cm_event_mpa_reject(event);
3974 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3977 case NES_CM_EVENT_ABORTED:
3978 if ((!event->cm_node->cm_id) ||
3979 (event->cm_node->state == NES_CM_STATE_TSA))
3981 cm_event_connect_error(event);
3982 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3984 case NES_CM_EVENT_DROPPED_PKT:
3985 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3988 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3992 atomic_dec(&cm_core->events_posted);
3993 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3994 rem_ref_cm_node(cm_core, event->cm_node);