2 * Copyright (c) 2006 - 2009 Intel Corporation. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #define TCPOPT_TIMESTAMP 8
37 #include <linux/atomic.h>
38 #include <linux/skbuff.h>
40 #include <linux/tcp.h>
41 #include <linux/init.h>
42 #include <linux/if_arp.h>
43 #include <linux/if_vlan.h>
44 #include <linux/notifier.h>
45 #include <linux/net.h>
46 #include <linux/types.h>
47 #include <linux/timer.h>
48 #include <linux/time.h>
49 #include <linux/delay.h>
50 #include <linux/etherdevice.h>
51 #include <linux/netdevice.h>
52 #include <linux/random.h>
53 #include <linux/list.h>
54 #include <linux/threads.h>
55 #include <linux/highmem.h>
56 #include <linux/slab.h>
58 #include <net/neighbour.h>
59 #include <net/route.h>
60 #include <net/ip_fib.h>
66 u32 cm_packets_bounced;
67 u32 cm_packets_dropped;
68 u32 cm_packets_retrans;
69 u32 cm_packets_created;
70 u32 cm_packets_received;
71 atomic_t cm_listens_created;
72 atomic_t cm_listens_destroyed;
74 atomic_t cm_loopbacks;
75 atomic_t cm_nodes_created;
76 atomic_t cm_nodes_destroyed;
77 atomic_t cm_accel_dropped_pkts;
78 atomic_t cm_resets_recvd;
80 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
81 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *);
82 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
83 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, struct nes_vnic *, u16, void *, struct nes_cm_info *);
84 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
85 static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *);
86 static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
87 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
88 static int mini_cm_dealloc_core(struct nes_cm_core *);
89 static int mini_cm_get(struct nes_cm_core *);
90 static int mini_cm_set(struct nes_cm_core *, u32, u32);
92 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
93 static int add_ref_cm_node(struct nes_cm_node *);
94 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
96 static int nes_cm_disconn_true(struct nes_qp *);
97 static int nes_cm_post_event(struct nes_cm_event *event);
98 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
99 static void nes_disconnect_worker(struct work_struct *work);
101 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
102 static int send_mpa_reject(struct nes_cm_node *);
103 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
104 static int send_reset(struct nes_cm_node *, struct sk_buff *);
105 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
106 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
107 static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
109 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
110 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
111 static void cleanup_retrans_entry(struct nes_cm_node *);
112 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
113 static void free_retrans_entry(struct nes_cm_node *cm_node);
114 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
116 /* CM event handler functions */
117 static void cm_event_connected(struct nes_cm_event *);
118 static void cm_event_connect_error(struct nes_cm_event *);
119 static void cm_event_reset(struct nes_cm_event *);
120 static void cm_event_mpa_req(struct nes_cm_event *);
121 static void cm_event_mpa_reject(struct nes_cm_event *);
122 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
124 /* MPA build functions */
125 static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
126 static void build_mpa_v2(struct nes_cm_node *, void *, u8);
127 static void build_mpa_v1(struct nes_cm_node *, void *, u8);
128 static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
130 static void print_core(struct nes_cm_core *core);
132 /* External CM API Interface */
133 /* instance of function pointers for client API */
134 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
135 static struct nes_cm_ops nes_cm_api = {
144 mini_cm_dealloc_core,
149 static struct nes_cm_core *g_cm_core;
151 atomic_t cm_connects;
153 atomic_t cm_disconnects;
155 atomic_t cm_connecteds;
156 atomic_t cm_connect_reqs;
159 int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
161 return add_ref_cm_node(cm_node);
164 int nes_rem_ref_cm_node(struct nes_cm_node *cm_node)
166 return rem_ref_cm_node(cm_node->cm_core, cm_node);
172 static struct nes_cm_event *create_event(struct nes_cm_node * cm_node,
173 enum nes_cm_event_type type)
175 struct nes_cm_event *event;
180 /* allocate an empty event */
181 event = kzalloc(sizeof(*event), GFP_ATOMIC);
187 event->cm_node = cm_node;
188 event->cm_info.rem_addr = cm_node->rem_addr;
189 event->cm_info.loc_addr = cm_node->loc_addr;
190 event->cm_info.rem_port = cm_node->rem_port;
191 event->cm_info.loc_port = cm_node->loc_port;
192 event->cm_info.cm_id = cm_node->cm_id;
194 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
195 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
196 cm_node, event, type, event->cm_info.loc_addr,
197 event->cm_info.loc_port, event->cm_info.rem_addr,
198 event->cm_info.rem_port);
200 nes_cm_post_event(event);
208 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
211 u8 *start_ptr = &start_addr;
212 u8 **start_buff = &start_ptr;
216 nes_debug(NES_DBG_CM, "skb set to NULL\n");
220 /* send an MPA Request frame */
221 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REQUEST);
222 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK);
224 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
229 static int send_mpa_reject(struct nes_cm_node *cm_node)
231 struct sk_buff *skb = NULL;
233 u8 *start_ptr = &start_addr;
234 u8 **start_buff = &start_ptr;
236 struct ietf_mpa_v1 *mpa_frame;
238 skb = dev_alloc_skb(MAX_CM_BUFFER);
240 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
244 /* send an MPA reject frame */
245 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY);
246 mpa_frame = (struct ietf_mpa_v1 *)*start_buff;
247 mpa_frame->flags |= IETF_MPA_FLAGS_REJECT;
248 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN);
250 cm_node->state = NES_CM_STATE_FIN_WAIT1;
251 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
256 * recv_mpa - process a received TCP pkt, we are expecting an
259 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
262 struct ietf_mpa_v1 *mpa_frame;
263 struct ietf_mpa_v2 *mpa_v2_frame;
264 struct ietf_rtr_msg *rtr_msg;
268 *type = NES_MPA_REQUEST_ACCEPT;
270 /* assume req frame is in tcp data payload */
271 if (len < sizeof(struct ietf_mpa_v1)) {
272 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
276 /* points to the beginning of the frame, which could be MPA V1 or V2 */
277 mpa_frame = (struct ietf_mpa_v1 *)buffer;
278 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
279 priv_data_len = ntohs(mpa_frame->priv_data_len);
281 /* make sure mpa private data len is less than 512 bytes */
282 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
283 nes_debug(NES_DBG_CM, "The received Length of Private"
284 " Data field exceeds 512 octets\n");
288 * make sure MPA receiver interoperate with the
289 * received MPA version and MPA key information
292 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
293 nes_debug(NES_DBG_CM, "The received mpa version"
294 " is not supported\n");
298 * backwards compatibility only
300 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
301 nes_debug(NES_DBG_CM, "The received mpa version"
302 " can not be interoperated\n");
305 cm_node->mpa_frame_rev = mpa_frame->rev;
308 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
309 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
310 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
314 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
315 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) {
341 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
342 mpa_hdr_len += IETF_RTR_MSG_SIZE;
343 cm_node->mpa_frame_size -= IETF_RTR_MSG_SIZE;
344 rtr_msg = &mpa_v2_frame->rtr_msg;
346 /* parse rtr message */
347 rtr_msg->ctrl_ird = ntohs(rtr_msg->ctrl_ird);
348 rtr_msg->ctrl_ord = ntohs(rtr_msg->ctrl_ord);
349 ird_size = rtr_msg->ctrl_ird & IETF_NO_IRD_ORD;
350 ord_size = rtr_msg->ctrl_ord & IETF_NO_IRD_ORD;
352 if (!(rtr_msg->ctrl_ird & IETF_PEER_TO_PEER)) {
357 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
359 if (cm_node->ord_size > ird_size)
360 cm_node->ord_size = ird_size;
363 if (cm_node->ord_size > ird_size)
364 cm_node->ord_size = ird_size;
366 if (cm_node->ird_size < ord_size) {
367 /* no resources available */
368 /* send terminate message */
373 if (rtr_msg->ctrl_ord & IETF_RDMA0_READ) {
374 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
375 } else if (rtr_msg->ctrl_ord & IETF_RDMA0_WRITE) {
376 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
377 } else { /* Not supported RDMA0 operation */
387 /* copy entire MPA frame to our cm_node's frame */
388 memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size);
390 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
391 *type = NES_MPA_REQUEST_REJECT;
397 * form_cm_frame - get a free packet and build empty frame Use
398 * node info to build.
400 static void form_cm_frame(struct sk_buff *skb,
401 struct nes_cm_node *cm_node, void *options, u32 optionsize,
402 void *data, u32 datasize, u8 flags)
408 u16 packetsize = sizeof(*iph);
410 packetsize += sizeof(*tcph);
411 packetsize += optionsize + datasize;
414 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
416 buf = skb_put(skb, packetsize + ETH_HLEN);
418 ethh = (struct ethhdr *)buf;
421 iph = (struct iphdr *)buf;
423 tcph = (struct tcphdr *)buf;
424 skb_reset_mac_header(skb);
425 skb_set_network_header(skb, ETH_HLEN);
426 skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph));
427 buf += sizeof(*tcph);
429 skb->ip_summed = CHECKSUM_PARTIAL;
430 skb->protocol = htons(0x800);
432 skb->mac_len = ETH_HLEN;
434 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
435 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
436 ethh->h_proto = htons(0x0800);
438 iph->version = IPVERSION;
439 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
441 iph->tot_len = htons(packetsize);
442 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
444 iph->frag_off = htons(0x4000);
446 iph->protocol = 0x06; /* IPPROTO_TCP */
448 iph->saddr = htonl(cm_node->loc_addr);
449 iph->daddr = htonl(cm_node->rem_addr);
451 tcph->source = htons(cm_node->loc_port);
452 tcph->dest = htons(cm_node->rem_port);
453 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
455 if (flags & SET_ACK) {
456 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
457 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
463 if (flags & SET_SYN) {
464 cm_node->tcp_cntxt.loc_seq_num++;
467 cm_node->tcp_cntxt.loc_seq_num += datasize;
470 if (flags & SET_FIN) {
471 cm_node->tcp_cntxt.loc_seq_num++;
478 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
479 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
482 memcpy(buf, options, optionsize);
485 memcpy(buf, data, datasize);
487 skb_shinfo(skb)->nr_frags = 0;
488 cm_packets_created++;
492 * print_core - dump a cm core
494 static void print_core(struct nes_cm_core *core)
496 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
497 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
500 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
502 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
504 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
505 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
507 nes_debug(NES_DBG_CM, "core : %p \n", core);
509 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
513 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
515 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
516 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
520 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
522 switch (cm_node->mpa_frame_rev) {
524 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
525 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
526 build_mpa_v1(cm_node, *start_buff, mpa_key);
529 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
530 build_mpa_v2(cm_node, *start_buff, mpa_key);
539 * build_mpa_v2 - build a MPA V2 frame
541 static void build_mpa_v2(struct nes_cm_node *cm_node,
542 void *start_addr, u8 mpa_key)
544 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
545 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
547 /* initialize the upper 5 bytes of the frame */
548 build_mpa_v1(cm_node, start_addr, mpa_key);
549 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
550 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
552 /* initialize RTR msg */
553 rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
554 IETF_NO_IRD_ORD : cm_node->ird_size;
555 rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
556 IETF_NO_IRD_ORD : cm_node->ord_size;
558 rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER;
559 rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN;
562 case MPA_KEY_REQUEST:
563 rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
564 rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
567 switch (cm_node->send_rdma0_op) {
568 case SEND_RDMA_WRITE_ZERO:
569 rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
571 case SEND_RDMA_READ_ZERO:
572 rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
576 rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird);
577 rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord);
581 * build_mpa_v1 - build a MPA V1 frame
583 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
585 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
588 case MPA_KEY_REQUEST:
589 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
592 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
595 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
596 mpa_frame->rev = cm_node->mpa_frame_rev;
597 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
600 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
603 struct nes_qp *nesqp = *nesqp_addr;
604 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
606 u64temp = (unsigned long)nesqp;
607 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
608 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
610 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
611 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
613 switch (cm_node->send_rdma0_op) {
614 case SEND_RDMA_WRITE_ZERO:
615 nes_debug(NES_DBG_CM, "Sending first write.\n");
616 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
617 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
618 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
619 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
620 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
623 case SEND_RDMA_READ_ZERO:
625 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO) {
626 printk(KERN_ERR "%s[%u]: Unsupported RDMA0 len operation=%u\n",
627 __func__, __LINE__, cm_node->send_rdma0_op);
630 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
631 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
632 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
633 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
634 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
635 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
636 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
637 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
641 if (nesqp->sq_kmapped) {
642 nesqp->sq_kmapped = 0;
646 /*use the reserved spot on the WQ for the extra first WQE*/
647 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
648 NES_QPCONTEXT_ORDIRD_WRPDU |
649 NES_QPCONTEXT_ORDIRD_ALSMM));
650 nesqp->skip_lsmm = 1;
651 nesqp->hwqp.sq_tail = 0;
656 * note - cm_node needs to be protected before calling this. Encase in:
657 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
659 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
660 enum nes_timer_type type, int send_retrans,
661 int close_when_complete)
664 struct nes_cm_core *cm_core = cm_node->cm_core;
665 struct nes_timer_entry *new_send;
669 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
673 /* new_send->timetosend = currenttime */
674 new_send->retrycount = NES_DEFAULT_RETRYS;
675 new_send->retranscount = NES_DEFAULT_RETRANS;
677 new_send->timetosend = jiffies;
678 new_send->type = type;
679 new_send->netdev = cm_node->netdev;
680 new_send->send_retrans = send_retrans;
681 new_send->close_when_complete = close_when_complete;
683 if (type == NES_TIMER_TYPE_CLOSE) {
684 new_send->timetosend += (HZ / 10);
685 if (cm_node->recv_entry) {
690 cm_node->recv_entry = new_send;
693 if (type == NES_TIMER_TYPE_SEND) {
694 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
695 atomic_inc(&new_send->skb->users);
696 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
697 cm_node->send_entry = new_send;
698 add_ref_cm_node(cm_node);
699 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
700 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
702 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
703 if (ret != NETDEV_TX_OK) {
704 nes_debug(NES_DBG_CM, "Error sending packet %p "
705 "(jiffies = %lu)\n", new_send, jiffies);
706 new_send->timetosend = jiffies;
711 cleanup_retrans_entry(cm_node);
712 if (close_when_complete)
713 rem_ref_cm_node(cm_core, cm_node);
719 was_timer_set = timer_pending(&cm_core->tcp_timer);
721 if (!was_timer_set) {
722 cm_core->tcp_timer.expires = new_send->timetosend;
723 add_timer(&cm_core->tcp_timer);
729 static void nes_retrans_expired(struct nes_cm_node *cm_node)
731 struct iw_cm_id *cm_id = cm_node->cm_id;
732 enum nes_cm_node_state state = cm_node->state;
733 cm_node->state = NES_CM_STATE_CLOSED;
736 case NES_CM_STATE_SYN_RCVD:
737 case NES_CM_STATE_CLOSING:
738 rem_ref_cm_node(cm_node->cm_core, cm_node);
740 case NES_CM_STATE_LAST_ACK:
741 case NES_CM_STATE_FIN_WAIT1:
743 cm_id->rem_ref(cm_id);
744 send_reset(cm_node, NULL);
747 add_ref_cm_node(cm_node);
748 send_reset(cm_node, NULL);
749 create_event(cm_node, NES_CM_EVENT_ABORTED);
753 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
755 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
756 struct iw_cm_id *cm_id = cm_node->cm_id;
757 struct nes_qp *nesqp;
758 unsigned long qplockflags;
762 nesqp = (struct nes_qp *)recv_entry->skb;
764 spin_lock_irqsave(&nesqp->lock, qplockflags);
766 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
767 "refcount = %d: HIT A "
768 "NES_TIMER_TYPE_CLOSE with something "
769 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
770 atomic_read(&nesqp->refcount));
771 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
772 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
773 nesqp->ibqp_state = IB_QPS_ERR;
774 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
775 nes_cm_disconn(nesqp);
777 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
778 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
779 "refcount = %d: HIT A "
780 "NES_TIMER_TYPE_CLOSE with nothing "
781 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
782 atomic_read(&nesqp->refcount));
784 } else if (rem_node) {
785 /* TIME_WAIT state */
786 rem_ref_cm_node(cm_node->cm_core, cm_node);
789 cm_id->rem_ref(cm_id);
791 cm_node->recv_entry = NULL;
797 static void nes_cm_timer_tick(unsigned long pass)
800 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
801 struct nes_cm_node *cm_node;
802 struct nes_timer_entry *send_entry, *recv_entry;
803 struct list_head *list_core_temp;
804 struct list_head *list_node;
805 struct nes_cm_core *cm_core = g_cm_core;
807 unsigned long timetosend;
808 int ret = NETDEV_TX_OK;
810 struct list_head timer_list;
812 INIT_LIST_HEAD(&timer_list);
813 spin_lock_irqsave(&cm_core->ht_lock, flags);
815 list_for_each_safe(list_node, list_core_temp,
816 &cm_core->connected_nodes) {
817 cm_node = container_of(list_node, struct nes_cm_node, list);
818 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
819 add_ref_cm_node(cm_node);
820 list_add(&cm_node->timer_entry, &timer_list);
823 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
825 list_for_each_safe(list_node, list_core_temp, &timer_list) {
826 cm_node = container_of(list_node, struct nes_cm_node,
828 recv_entry = cm_node->recv_entry;
831 if (time_after(recv_entry->timetosend, jiffies)) {
832 if (nexttimeout > recv_entry->timetosend ||
834 nexttimeout = recv_entry->timetosend;
838 handle_recv_entry(cm_node, 1);
842 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
844 send_entry = cm_node->send_entry;
847 if (time_after(send_entry->timetosend, jiffies)) {
848 if (cm_node->state != NES_CM_STATE_TSA) {
850 send_entry->timetosend) ||
853 send_entry->timetosend;
857 free_retrans_entry(cm_node);
862 if ((cm_node->state == NES_CM_STATE_TSA) ||
863 (cm_node->state == NES_CM_STATE_CLOSED)) {
864 free_retrans_entry(cm_node);
868 if (!send_entry->retranscount ||
869 !send_entry->retrycount) {
870 cm_packets_dropped++;
871 free_retrans_entry(cm_node);
873 spin_unlock_irqrestore(
874 &cm_node->retrans_list_lock, flags);
875 nes_retrans_expired(cm_node);
876 cm_node->state = NES_CM_STATE_CLOSED;
877 spin_lock_irqsave(&cm_node->retrans_list_lock,
881 atomic_inc(&send_entry->skb->users);
882 cm_packets_retrans++;
883 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
884 "for node %p, jiffies = %lu, time to send = "
885 "%lu, retranscount = %u, send_entry->seq_num = "
886 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
887 "0x%08X\n", send_entry, cm_node, jiffies,
888 send_entry->timetosend,
889 send_entry->retranscount,
891 cm_node->tcp_cntxt.rem_ack_num);
893 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
895 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
896 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
897 if (ret != NETDEV_TX_OK) {
898 nes_debug(NES_DBG_CM, "rexmit failed for "
899 "node=%p\n", cm_node);
900 cm_packets_bounced++;
901 send_entry->retrycount--;
902 nexttimeout = jiffies + NES_SHORT_TIME;
908 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
909 "%u, retry count = %u.\n",
910 send_entry->retranscount,
911 send_entry->retrycount);
912 if (send_entry->send_retrans) {
913 send_entry->retranscount--;
914 timetosend = (NES_RETRY_TIMEOUT <<
915 (NES_DEFAULT_RETRANS - send_entry->retranscount));
917 send_entry->timetosend = jiffies +
918 min(timetosend, NES_MAX_TIMEOUT);
919 if (nexttimeout > send_entry->timetosend ||
921 nexttimeout = send_entry->timetosend;
925 int close_when_complete;
926 close_when_complete =
927 send_entry->close_when_complete;
928 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
929 cm_node, cm_node->state);
930 free_retrans_entry(cm_node);
931 if (close_when_complete)
932 rem_ref_cm_node(cm_node->cm_core,
937 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
938 rem_ref_cm_node(cm_node->cm_core, cm_node);
942 if (!timer_pending(&cm_core->tcp_timer)) {
943 cm_core->tcp_timer.expires = nexttimeout;
944 add_timer(&cm_core->tcp_timer);
953 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
958 char optionsbuffer[sizeof(struct option_mss) +
959 sizeof(struct option_windowscale) + sizeof(struct option_base) +
960 TCP_OPTIONS_PADDING];
963 /* Sending MSS option */
964 union all_known_options *options;
969 options = (union all_known_options *)&optionsbuffer[optionssize];
970 options->as_mss.optionnum = OPTION_NUMBER_MSS;
971 options->as_mss.length = sizeof(struct option_mss);
972 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
973 optionssize += sizeof(struct option_mss);
975 options = (union all_known_options *)&optionsbuffer[optionssize];
976 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
977 options->as_windowscale.length = sizeof(struct option_windowscale);
978 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
979 optionssize += sizeof(struct option_windowscale);
981 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
982 options = (union all_known_options *)&optionsbuffer[optionssize];
983 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
984 options->as_base.length = sizeof(struct option_base);
985 optionssize += sizeof(struct option_base);
986 /* we need the size to be a multiple of 4 */
987 options = (union all_known_options *)&optionsbuffer[optionssize];
990 options = (union all_known_options *)&optionsbuffer[optionssize];
995 options = (union all_known_options *)&optionsbuffer[optionssize];
996 options->as_end = OPTION_NUMBER_END;
1000 skb = dev_alloc_skb(MAX_CM_BUFFER);
1002 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1009 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1010 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1019 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1022 int flags = SET_RST | SET_ACK;
1025 skb = dev_alloc_skb(MAX_CM_BUFFER);
1027 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1031 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1032 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1041 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1046 skb = dev_alloc_skb(MAX_CM_BUFFER);
1049 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1053 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1054 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1063 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1067 /* if we didn't get a frame get one */
1069 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, SET_ACK | SET_FIN);
1077 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1084 * find_node - find a cm node that matches the reference cm node
1086 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1087 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1089 unsigned long flags;
1090 struct list_head *hte;
1091 struct nes_cm_node *cm_node;
1093 /* get a handle on the hte */
1094 hte = &cm_core->connected_nodes;
1096 /* walk list and find cm_node associated with this session ID */
1097 spin_lock_irqsave(&cm_core->ht_lock, flags);
1098 list_for_each_entry(cm_node, hte, list) {
1099 /* compare quad, return node handle if a match */
1100 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1101 cm_node->loc_addr, cm_node->loc_port,
1103 cm_node->rem_addr, cm_node->rem_port,
1104 rem_addr, rem_port);
1105 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
1106 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
1107 add_ref_cm_node(cm_node);
1108 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1112 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1120 * find_listener - find a cm node listening on this addr-port pair
1122 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1123 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
1125 unsigned long flags;
1126 struct nes_cm_listener *listen_node;
1128 /* walk list and find cm_node associated with this session ID */
1129 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1130 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1131 /* compare node pair, return node handle if a match */
1132 if (((listen_node->loc_addr == dst_addr) ||
1133 listen_node->loc_addr == 0x00000000) &&
1134 (listen_node->loc_port == dst_port) &&
1135 (listener_state & listen_node->listener_state)) {
1136 atomic_inc(&listen_node->ref_count);
1137 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1141 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1149 * add_hte_node - add a cm node to the hash table
1151 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1153 unsigned long flags;
1154 struct list_head *hte;
1156 if (!cm_node || !cm_core)
1159 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1162 spin_lock_irqsave(&cm_core->ht_lock, flags);
1164 /* get a handle on the hash table element (list head for this slot) */
1165 hte = &cm_core->connected_nodes;
1166 list_add_tail(&cm_node->list, hte);
1167 atomic_inc(&cm_core->ht_node_cnt);
1169 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1176 * mini_cm_dec_refcnt_listen
1178 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1179 struct nes_cm_listener *listener, int free_hanging_nodes)
1183 unsigned long flags;
1184 struct list_head *list_pos = NULL;
1185 struct list_head *list_temp = NULL;
1186 struct nes_cm_node *cm_node = NULL;
1187 struct list_head reset_list;
1189 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1190 "refcnt=%d\n", listener, free_hanging_nodes,
1191 atomic_read(&listener->ref_count));
1192 /* free non-accelerated child nodes for this listener */
1193 INIT_LIST_HEAD(&reset_list);
1194 if (free_hanging_nodes) {
1195 spin_lock_irqsave(&cm_core->ht_lock, flags);
1196 list_for_each_safe(list_pos, list_temp,
1197 &g_cm_core->connected_nodes) {
1198 cm_node = container_of(list_pos, struct nes_cm_node,
1200 if ((cm_node->listener == listener) &&
1201 (!cm_node->accelerated)) {
1202 add_ref_cm_node(cm_node);
1203 list_add(&cm_node->reset_entry, &reset_list);
1206 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1209 list_for_each_safe(list_pos, list_temp, &reset_list) {
1210 cm_node = container_of(list_pos, struct nes_cm_node,
1213 struct nes_cm_node *loopback = cm_node->loopbackpartner;
1214 enum nes_cm_node_state old_state;
1215 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1216 rem_ref_cm_node(cm_node->cm_core, cm_node);
1219 cleanup_retrans_entry(cm_node);
1220 err = send_reset(cm_node, NULL);
1223 NES_CM_STATE_CLOSED;
1226 old_state = cm_node->state;
1227 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1228 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1234 struct nes_cm_event event;
1236 event.cm_node = loopback;
1237 event.cm_info.rem_addr =
1239 event.cm_info.loc_addr =
1241 event.cm_info.rem_port =
1243 event.cm_info.loc_port =
1245 event.cm_info.cm_id = loopback->cm_id;
1246 add_ref_cm_node(loopback);
1247 loopback->state = NES_CM_STATE_CLOSED;
1248 cm_event_connect_error(&event);
1249 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1251 rem_ref_cm_node(cm_node->cm_core,
1259 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1260 if (!atomic_dec_return(&listener->ref_count)) {
1261 list_del(&listener->list);
1263 /* decrement our listen node count */
1264 atomic_dec(&cm_core->listen_node_cnt);
1266 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1268 if (listener->nesvnic)
1269 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1270 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1272 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1277 atomic_inc(&cm_listens_destroyed);
1279 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1282 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1283 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1284 " with non-zero pending accepts=%u\n",
1285 listener, atomic_read(&listener->pend_accepts_cnt));
1293 * mini_cm_del_listen
1295 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1296 struct nes_cm_listener *listener)
1298 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1299 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1300 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1305 * mini_cm_accelerated
1307 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1308 struct nes_cm_node *cm_node)
1312 cm_node->accelerated = 1;
1314 if (cm_node->accept_pend) {
1315 BUG_ON(!cm_node->listener);
1316 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1317 cm_node->accept_pend = 0;
1318 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1321 was_timer_set = timer_pending(&cm_core->tcp_timer);
1322 if (!was_timer_set) {
1323 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1324 add_timer(&cm_core->tcp_timer);
1332 * nes_addr_resolve_neigh
1334 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1337 struct neighbour *neigh;
1339 struct net_device *netdev;
1340 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1342 rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
1344 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1349 if (netif_is_bond_slave(nesvnic->netdev))
1350 netdev = nesvnic->netdev->master;
1352 netdev = nesvnic->netdev;
1355 neigh = dst_get_neighbour_noref(&rt->dst);
1357 if (neigh->nud_state & NUD_VALID) {
1358 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1359 " is %pM, Gateway is 0x%08X \n", dst_ip,
1360 neigh->ha, ntohl(rt->rt_gateway));
1362 if (arpindex >= 0) {
1363 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1364 neigh->ha, ETH_ALEN)) {
1365 /* Mac address same as in nes_arp_table */
1370 nes_manage_arp_cache(nesvnic->netdev,
1371 nesadapter->arp_table[arpindex].mac_addr,
1372 dst_ip, NES_ARP_DELETE);
1375 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1376 dst_ip, NES_ARP_ADD);
1377 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1380 neigh_event_send(neigh, NULL);
1389 * make_cm_node - create a new instance of a cm node
1391 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1392 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1393 struct nes_cm_listener *listener)
1395 struct nes_cm_node *cm_node;
1397 int oldarpindex = 0;
1399 struct nes_device *nesdev;
1400 struct nes_adapter *nesadapter;
1402 /* create an hte and cm_node for this instance */
1403 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1407 /* set our node specific transport info */
1408 cm_node->loc_addr = cm_info->loc_addr;
1409 cm_node->rem_addr = cm_info->rem_addr;
1410 cm_node->loc_port = cm_info->loc_port;
1411 cm_node->rem_port = cm_info->rem_port;
1413 cm_node->mpa_frame_rev = mpa_version;
1414 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1415 cm_node->ird_size = IETF_NO_IRD_ORD;
1416 cm_node->ord_size = IETF_NO_IRD_ORD;
1418 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1419 &cm_node->loc_addr, cm_node->loc_port,
1420 &cm_node->rem_addr, cm_node->rem_port);
1421 cm_node->listener = listener;
1422 cm_node->netdev = nesvnic->netdev;
1423 cm_node->cm_id = cm_info->cm_id;
1424 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1426 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1429 spin_lock_init(&cm_node->retrans_list_lock);
1431 cm_node->loopbackpartner = NULL;
1432 atomic_set(&cm_node->ref_count, 1);
1433 /* associate our parent CM core */
1434 cm_node->cm_core = cm_core;
1435 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1436 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1437 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1438 NES_CM_DEFAULT_RCV_WND_SCALE;
1439 ts = current_kernel_time();
1440 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1441 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1442 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1443 cm_node->tcp_cntxt.rcv_nxt = 0;
1444 /* get a unique session ID , add thread_id to an upcounter to handle race */
1445 atomic_inc(&cm_core->node_cnt);
1446 cm_node->conn_type = cm_info->conn_type;
1447 cm_node->apbvt_set = 0;
1448 cm_node->accept_pend = 0;
1450 cm_node->nesvnic = nesvnic;
1451 /* get some device handles, for arp lookup */
1452 nesdev = nesvnic->nesdev;
1453 nesadapter = nesdev->nesadapter;
1455 cm_node->loopbackpartner = NULL;
1457 /* get the mac addr for the remote node */
1458 if (ipv4_is_loopback(htonl(cm_node->rem_addr))) {
1459 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1461 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1462 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1469 /* copy the mac addr to node context */
1470 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1471 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1474 add_hte_node(cm_core, cm_node);
1475 atomic_inc(&cm_nodes_created);
1482 * add_ref_cm_node - destroy an instance of a cm node
1484 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1486 atomic_inc(&cm_node->ref_count);
1492 * rem_ref_cm_node - destroy an instance of a cm node
1494 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1495 struct nes_cm_node *cm_node)
1497 unsigned long flags;
1498 struct nes_qp *nesqp;
1503 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1504 if (atomic_dec_return(&cm_node->ref_count)) {
1505 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1508 list_del(&cm_node->list);
1509 atomic_dec(&cm_core->ht_node_cnt);
1510 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1512 /* if the node is destroyed before connection was accelerated */
1513 if (!cm_node->accelerated && cm_node->accept_pend) {
1514 BUG_ON(!cm_node->listener);
1515 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1516 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1518 WARN_ON(cm_node->send_entry);
1519 if (cm_node->recv_entry)
1520 handle_recv_entry(cm_node, 0);
1521 if (cm_node->listener) {
1522 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1524 if (cm_node->apbvt_set && cm_node->nesvnic) {
1525 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1527 cm_node->nesvnic->nesdev->pcidev->devfn),
1528 NES_MANAGE_APBVT_DEL);
1532 atomic_dec(&cm_core->node_cnt);
1533 atomic_inc(&cm_nodes_destroyed);
1534 nesqp = cm_node->nesqp;
1536 nesqp->cm_node = NULL;
1537 nes_rem_ref(&nesqp->ibqp);
1538 cm_node->nesqp = NULL;
1548 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1549 u32 optionsize, u32 syn_packet)
1553 union all_known_options *all_options;
1554 char got_mss_option = 0;
1556 while (offset < optionsize) {
1557 all_options = (union all_known_options *)(optionsloc + offset);
1558 switch (all_options->as_base.optionnum) {
1559 case OPTION_NUMBER_END:
1560 offset = optionsize;
1562 case OPTION_NUMBER_NONE:
1565 case OPTION_NUMBER_MSS:
1566 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1567 "Size: %d\n", __func__,
1568 all_options->as_mss.length, offset, optionsize);
1570 if (all_options->as_mss.length != 4) {
1573 tmp = ntohs(all_options->as_mss.mss);
1574 if (tmp > 0 && tmp <
1575 cm_node->tcp_cntxt.mss)
1576 cm_node->tcp_cntxt.mss = tmp;
1579 case OPTION_NUMBER_WINDOW_SCALE:
1580 cm_node->tcp_cntxt.snd_wscale =
1581 all_options->as_windowscale.shiftcount;
1584 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1585 all_options->as_base.optionnum);
1588 offset += all_options->as_base.length;
1590 if ((!got_mss_option) && (syn_packet))
1591 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1595 static void drop_packet(struct sk_buff *skb)
1597 atomic_inc(&cm_accel_dropped_pkts);
1598 dev_kfree_skb_any(skb);
1601 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1603 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1604 "refcnt=%d\n", cm_node, cm_node->state,
1605 atomic_read(&cm_node->ref_count));
1606 switch (cm_node->state) {
1607 case NES_CM_STATE_SYN_RCVD:
1608 case NES_CM_STATE_SYN_SENT:
1609 case NES_CM_STATE_ESTABLISHED:
1610 case NES_CM_STATE_MPAREJ_RCVD:
1611 cm_node->tcp_cntxt.rcv_nxt++;
1612 cleanup_retrans_entry(cm_node);
1613 cm_node->state = NES_CM_STATE_LAST_ACK;
1614 send_fin(cm_node, NULL);
1616 case NES_CM_STATE_MPAREQ_SENT:
1617 create_event(cm_node, NES_CM_EVENT_ABORTED);
1618 cm_node->tcp_cntxt.rcv_nxt++;
1619 cleanup_retrans_entry(cm_node);
1620 cm_node->state = NES_CM_STATE_CLOSED;
1621 add_ref_cm_node(cm_node);
1622 send_reset(cm_node, NULL);
1624 case NES_CM_STATE_FIN_WAIT1:
1625 cm_node->tcp_cntxt.rcv_nxt++;
1626 cleanup_retrans_entry(cm_node);
1627 cm_node->state = NES_CM_STATE_CLOSING;
1628 send_ack(cm_node, NULL);
1629 /* Wait for ACK as this is simultaneous close..
1630 * After we receive ACK, do not send anything..
1631 * Just rm the node.. Done.. */
1633 case NES_CM_STATE_FIN_WAIT2:
1634 cm_node->tcp_cntxt.rcv_nxt++;
1635 cleanup_retrans_entry(cm_node);
1636 cm_node->state = NES_CM_STATE_TIME_WAIT;
1637 send_ack(cm_node, NULL);
1638 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1640 case NES_CM_STATE_TIME_WAIT:
1641 cm_node->tcp_cntxt.rcv_nxt++;
1642 cleanup_retrans_entry(cm_node);
1643 cm_node->state = NES_CM_STATE_CLOSED;
1644 rem_ref_cm_node(cm_node->cm_core, cm_node);
1646 case NES_CM_STATE_TSA:
1648 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1649 cm_node, cm_node->state);
1655 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1656 struct tcphdr *tcph)
1659 int reset = 0; /* whether to send reset in case of err.. */
1660 atomic_inc(&cm_resets_recvd);
1661 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1662 " refcnt=%d\n", cm_node, cm_node->state,
1663 atomic_read(&cm_node->ref_count));
1664 cleanup_retrans_entry(cm_node);
1665 switch (cm_node->state) {
1666 case NES_CM_STATE_SYN_SENT:
1667 case NES_CM_STATE_MPAREQ_SENT:
1668 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1669 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1670 cm_node->listener, cm_node->state);
1671 switch (cm_node->mpa_frame_rev) {
1673 cm_node->mpa_frame_rev = IETF_MPA_V1;
1674 /* send a syn and goto syn sent state */
1675 cm_node->state = NES_CM_STATE_SYN_SENT;
1676 if (send_syn(cm_node, 0, NULL)) {
1677 active_open_err(cm_node, skb, reset);
1682 active_open_err(cm_node, skb, reset);
1686 case NES_CM_STATE_MPAREQ_RCVD:
1687 atomic_inc(&cm_node->passive_state);
1688 dev_kfree_skb_any(skb);
1690 case NES_CM_STATE_ESTABLISHED:
1691 case NES_CM_STATE_SYN_RCVD:
1692 case NES_CM_STATE_LISTENING:
1693 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1694 passive_open_err(cm_node, skb, reset);
1696 case NES_CM_STATE_TSA:
1697 active_open_err(cm_node, skb, reset);
1699 case NES_CM_STATE_CLOSED:
1702 case NES_CM_STATE_FIN_WAIT2:
1703 case NES_CM_STATE_FIN_WAIT1:
1704 case NES_CM_STATE_LAST_ACK:
1705 cm_node->cm_id->rem_ref(cm_node->cm_id);
1706 case NES_CM_STATE_TIME_WAIT:
1707 cm_node->state = NES_CM_STATE_CLOSED;
1708 rem_ref_cm_node(cm_node->cm_core, cm_node);
1718 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1721 int datasize = skb->len;
1722 u8 *dataloc = skb->data;
1724 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1727 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1729 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1730 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1731 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1732 "cm_node=%p listener=%p state=%d\n", __func__,
1733 __LINE__, cm_node, cm_node->listener,
1735 active_open_err(cm_node, skb, 1);
1737 passive_open_err(cm_node, skb, 1);
1742 switch (cm_node->state) {
1743 case NES_CM_STATE_ESTABLISHED:
1744 if (res_type == NES_MPA_REQUEST_REJECT)
1745 /*BIG problem as we are receiving the MPA.. So should
1746 * not be REJECT.. This is Passive Open.. We can
1747 * only receive it Reject for Active Open...*/
1749 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1750 type = NES_CM_EVENT_MPA_REQ;
1751 atomic_set(&cm_node->passive_state,
1752 NES_PASSIVE_STATE_INDICATED);
1754 case NES_CM_STATE_MPAREQ_SENT:
1755 cleanup_retrans_entry(cm_node);
1756 if (res_type == NES_MPA_REQUEST_REJECT) {
1757 type = NES_CM_EVENT_MPA_REJECT;
1758 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1760 type = NES_CM_EVENT_CONNECTED;
1761 cm_node->state = NES_CM_STATE_TSA;
1769 dev_kfree_skb_any(skb);
1770 create_event(cm_node, type);
1773 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1775 switch (cm_node->state) {
1776 case NES_CM_STATE_SYN_SENT:
1777 case NES_CM_STATE_MPAREQ_SENT:
1778 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1779 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1780 cm_node->listener, cm_node->state);
1781 active_open_err(cm_node, skb, 1);
1783 case NES_CM_STATE_ESTABLISHED:
1784 case NES_CM_STATE_SYN_RCVD:
1785 passive_open_err(cm_node, skb, 1);
1787 case NES_CM_STATE_TSA:
1793 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1794 struct sk_buff *skb)
1798 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1800 active_open_err(cm_node, skb, 1);
1805 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1806 struct sk_buff *skb)
1811 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1812 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1815 seq = ntohl(tcph->seq);
1816 ack_seq = ntohl(tcph->ack_seq);
1817 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1818 if (ack_seq != loc_seq_num)
1820 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
1823 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1824 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1825 cm_node->listener, cm_node->state);
1826 indicate_pkt_err(cm_node, skb);
1827 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1828 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1835 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1836 * is created with a listener or it may comein as rexmitted packet which in
1837 * that case will be just dropped.
1839 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1840 struct tcphdr *tcph)
1846 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1848 inc_sequence = ntohl(tcph->seq);
1850 switch (cm_node->state) {
1851 case NES_CM_STATE_SYN_SENT:
1852 case NES_CM_STATE_MPAREQ_SENT:
1853 /* Rcvd syn on active open connection*/
1854 active_open_err(cm_node, skb, 1);
1856 case NES_CM_STATE_LISTENING:
1858 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1859 cm_node->listener->backlog) {
1860 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1863 passive_open_err(cm_node, skb, 0);
1866 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1869 passive_open_err(cm_node, skb, 0);
1873 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1874 BUG_ON(cm_node->send_entry);
1875 cm_node->accept_pend = 1;
1876 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1878 cm_node->state = NES_CM_STATE_SYN_RCVD;
1879 send_syn(cm_node, 1, skb);
1881 case NES_CM_STATE_CLOSED:
1882 cleanup_retrans_entry(cm_node);
1883 add_ref_cm_node(cm_node);
1884 send_reset(cm_node, skb);
1886 case NES_CM_STATE_TSA:
1887 case NES_CM_STATE_ESTABLISHED:
1888 case NES_CM_STATE_FIN_WAIT1:
1889 case NES_CM_STATE_FIN_WAIT2:
1890 case NES_CM_STATE_MPAREQ_RCVD:
1891 case NES_CM_STATE_LAST_ACK:
1892 case NES_CM_STATE_CLOSING:
1893 case NES_CM_STATE_UNKNOWN:
1900 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1901 struct tcphdr *tcph)
1907 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1909 inc_sequence = ntohl(tcph->seq);
1910 switch (cm_node->state) {
1911 case NES_CM_STATE_SYN_SENT:
1912 cleanup_retrans_entry(cm_node);
1914 if (check_syn(cm_node, tcph, skb))
1916 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1918 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1920 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1924 cleanup_retrans_entry(cm_node);
1925 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1926 send_mpa_request(cm_node, skb);
1927 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1929 case NES_CM_STATE_MPAREQ_RCVD:
1930 /* passive open, so should not be here */
1931 passive_open_err(cm_node, skb, 1);
1933 case NES_CM_STATE_LISTENING:
1934 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1935 cleanup_retrans_entry(cm_node);
1936 cm_node->state = NES_CM_STATE_CLOSED;
1937 send_reset(cm_node, skb);
1939 case NES_CM_STATE_CLOSED:
1940 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1941 cleanup_retrans_entry(cm_node);
1942 add_ref_cm_node(cm_node);
1943 send_reset(cm_node, skb);
1945 case NES_CM_STATE_ESTABLISHED:
1946 case NES_CM_STATE_FIN_WAIT1:
1947 case NES_CM_STATE_FIN_WAIT2:
1948 case NES_CM_STATE_LAST_ACK:
1949 case NES_CM_STATE_TSA:
1950 case NES_CM_STATE_CLOSING:
1951 case NES_CM_STATE_UNKNOWN:
1952 case NES_CM_STATE_MPAREQ_SENT:
1959 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1960 struct tcphdr *tcph)
1967 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1969 if (check_seq(cm_node, tcph, skb))
1972 skb_pull(skb, tcph->doff << 2);
1973 inc_sequence = ntohl(tcph->seq);
1974 datasize = skb->len;
1975 switch (cm_node->state) {
1976 case NES_CM_STATE_SYN_RCVD:
1978 cleanup_retrans_entry(cm_node);
1979 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1982 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1983 cm_node->state = NES_CM_STATE_ESTABLISHED;
1985 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1986 handle_rcv_mpa(cm_node, skb);
1987 } else { /* rcvd ACK only */
1988 dev_kfree_skb_any(skb);
1991 case NES_CM_STATE_ESTABLISHED:
1993 cleanup_retrans_entry(cm_node);
1995 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1996 handle_rcv_mpa(cm_node, skb);
2001 case NES_CM_STATE_MPAREQ_SENT:
2002 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2004 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2005 handle_rcv_mpa(cm_node, skb);
2006 } else { /* Could be just an ack pkt.. */
2007 dev_kfree_skb_any(skb);
2010 case NES_CM_STATE_LISTENING:
2011 cleanup_retrans_entry(cm_node);
2012 cm_node->state = NES_CM_STATE_CLOSED;
2013 send_reset(cm_node, skb);
2015 case NES_CM_STATE_CLOSED:
2016 cleanup_retrans_entry(cm_node);
2017 add_ref_cm_node(cm_node);
2018 send_reset(cm_node, skb);
2020 case NES_CM_STATE_LAST_ACK:
2021 case NES_CM_STATE_CLOSING:
2022 cleanup_retrans_entry(cm_node);
2023 cm_node->state = NES_CM_STATE_CLOSED;
2024 cm_node->cm_id->rem_ref(cm_node->cm_id);
2025 rem_ref_cm_node(cm_node->cm_core, cm_node);
2028 case NES_CM_STATE_FIN_WAIT1:
2029 cleanup_retrans_entry(cm_node);
2031 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2033 case NES_CM_STATE_SYN_SENT:
2034 case NES_CM_STATE_FIN_WAIT2:
2035 case NES_CM_STATE_TSA:
2036 case NES_CM_STATE_MPAREQ_RCVD:
2037 case NES_CM_STATE_UNKNOWN:
2039 cleanup_retrans_entry(cm_node);
2048 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2049 struct sk_buff *skb, int optionsize, int passive)
2051 u8 *optionsloc = (u8 *)&tcph[1];
2054 if (process_options(cm_node, optionsloc, optionsize,
2056 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2059 passive_open_err(cm_node, skb, 1);
2061 active_open_err(cm_node, skb, 1);
2066 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2067 cm_node->tcp_cntxt.snd_wscale;
2069 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2070 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2075 * active_open_err() will send reset() if flag set..
2076 * It will also send ABORT event.
2078 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2081 cleanup_retrans_entry(cm_node);
2083 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2084 "state=%d\n", cm_node, cm_node->state);
2085 add_ref_cm_node(cm_node);
2086 send_reset(cm_node, skb);
2088 dev_kfree_skb_any(skb);
2091 cm_node->state = NES_CM_STATE_CLOSED;
2092 create_event(cm_node, NES_CM_EVENT_ABORTED);
2096 * passive_open_err() will either do a reset() or will free up the skb and
2097 * remove the cm_node.
2099 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2102 cleanup_retrans_entry(cm_node);
2103 cm_node->state = NES_CM_STATE_CLOSED;
2105 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2106 "cm_node=%p state =%d\n", cm_node, cm_node->state);
2107 send_reset(cm_node, skb);
2109 dev_kfree_skb_any(skb);
2110 rem_ref_cm_node(cm_node->cm_core, cm_node);
2115 * free_retrans_entry() routines assumes that the retrans_list_lock has
2116 * been acquired before calling.
2118 static void free_retrans_entry(struct nes_cm_node *cm_node)
2120 struct nes_timer_entry *send_entry;
2122 send_entry = cm_node->send_entry;
2124 cm_node->send_entry = NULL;
2125 dev_kfree_skb_any(send_entry->skb);
2127 rem_ref_cm_node(cm_node->cm_core, cm_node);
2131 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2133 unsigned long flags;
2135 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2136 free_retrans_entry(cm_node);
2137 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2142 * Returns skb if to be freed, else it will return NULL if already used..
2144 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2145 struct nes_cm_core *cm_core)
2147 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2148 struct tcphdr *tcph = tcp_hdr(skb);
2152 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2154 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2155 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2156 tcph->ack, tcph->rst, tcph->fin);
2159 pkt_type = NES_PKT_TYPE_RST;
2160 } else if (tcph->syn) {
2161 pkt_type = NES_PKT_TYPE_SYN;
2163 pkt_type = NES_PKT_TYPE_SYNACK;
2164 } else if (tcph->ack) {
2165 pkt_type = NES_PKT_TYPE_ACK;
2171 case NES_PKT_TYPE_SYN:
2172 handle_syn_pkt(cm_node, skb, tcph);
2174 case NES_PKT_TYPE_SYNACK:
2175 handle_synack_pkt(cm_node, skb, tcph);
2177 case NES_PKT_TYPE_ACK:
2178 ret = handle_ack_pkt(cm_node, skb, tcph);
2179 if (fin_set && !ret)
2180 handle_fin_pkt(cm_node);
2182 case NES_PKT_TYPE_RST:
2183 handle_rst_pkt(cm_node, skb, tcph);
2186 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2187 handle_fin_pkt(cm_node);
2194 * mini_cm_listen - create a listen node with params
2196 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2197 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2199 struct nes_cm_listener *listener;
2200 unsigned long flags;
2202 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2203 cm_info->loc_addr, cm_info->loc_port);
2205 /* cannot have multiple matching listeners */
2206 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
2207 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
2208 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2209 /* find automatically incs ref count ??? */
2210 atomic_dec(&listener->ref_count);
2211 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2216 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2217 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2219 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2223 listener->loc_addr = htonl(cm_info->loc_addr);
2224 listener->loc_port = htons(cm_info->loc_port);
2225 listener->reused_node = 0;
2227 atomic_set(&listener->ref_count, 1);
2230 /* find already inc'ed the ref count */
2232 listener->reused_node = 1;
2235 listener->cm_id = cm_info->cm_id;
2236 atomic_set(&listener->pend_accepts_cnt, 0);
2237 listener->cm_core = cm_core;
2238 listener->nesvnic = nesvnic;
2239 atomic_inc(&cm_core->node_cnt);
2241 listener->conn_type = cm_info->conn_type;
2242 listener->backlog = cm_info->backlog;
2243 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2245 if (!listener->reused_node) {
2246 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2247 list_add(&listener->list, &cm_core->listen_list.list);
2248 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2249 atomic_inc(&cm_core->listen_node_cnt);
2252 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2253 " listener = %p, backlog = %d, cm_id = %p.\n",
2254 cm_info->loc_addr, cm_info->loc_port,
2255 listener, listener->backlog, listener->cm_id);
2262 * mini_cm_connect - make a connection node with params
2264 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2265 struct nes_vnic *nesvnic, u16 private_data_len,
2266 void *private_data, struct nes_cm_info *cm_info)
2269 struct nes_cm_node *cm_node;
2270 struct nes_cm_listener *loopbackremotelistener;
2271 struct nes_cm_node *loopbackremotenode;
2272 struct nes_cm_info loopback_cm_info;
2275 /* create a CM connection node */
2276 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2280 /* set our node side to client (active) side */
2281 cm_node->tcp_cntxt.client = 1;
2282 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2284 if (cm_info->loc_addr == cm_info->rem_addr) {
2285 loopbackremotelistener = find_listener(cm_core,
2286 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2287 NES_CM_LISTENER_ACTIVE_STATE);
2288 if (loopbackremotelistener == NULL) {
2289 create_event(cm_node, NES_CM_EVENT_ABORTED);
2291 loopback_cm_info = *cm_info;
2292 loopback_cm_info.loc_port = cm_info->rem_port;
2293 loopback_cm_info.rem_port = cm_info->loc_port;
2294 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2295 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2296 &loopback_cm_info, loopbackremotelistener);
2297 if (!loopbackremotenode) {
2298 rem_ref_cm_node(cm_node->cm_core, cm_node);
2301 atomic_inc(&cm_loopbacks);
2302 loopbackremotenode->loopbackpartner = cm_node;
2303 loopbackremotenode->tcp_cntxt.rcv_wscale =
2304 NES_CM_DEFAULT_RCV_WND_SCALE;
2305 cm_node->loopbackpartner = loopbackremotenode;
2306 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2308 loopbackremotenode->mpa_frame_size = private_data_len;
2310 /* we are done handling this state. */
2311 /* set node to a TSA state */
2312 cm_node->state = NES_CM_STATE_TSA;
2313 cm_node->tcp_cntxt.rcv_nxt =
2314 loopbackremotenode->tcp_cntxt.loc_seq_num;
2315 loopbackremotenode->tcp_cntxt.rcv_nxt =
2316 cm_node->tcp_cntxt.loc_seq_num;
2317 cm_node->tcp_cntxt.max_snd_wnd =
2318 loopbackremotenode->tcp_cntxt.rcv_wnd;
2319 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2320 cm_node->tcp_cntxt.rcv_wnd;
2321 cm_node->tcp_cntxt.snd_wnd =
2322 loopbackremotenode->tcp_cntxt.rcv_wnd;
2323 loopbackremotenode->tcp_cntxt.snd_wnd =
2324 cm_node->tcp_cntxt.rcv_wnd;
2325 cm_node->tcp_cntxt.snd_wscale =
2326 loopbackremotenode->tcp_cntxt.rcv_wscale;
2327 loopbackremotenode->tcp_cntxt.snd_wscale =
2328 cm_node->tcp_cntxt.rcv_wscale;
2329 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2330 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2335 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2336 cm_node->mpa_frame_size = private_data_len;
2338 memcpy(start_buff, private_data, private_data_len);
2340 /* send a syn and goto syn sent state */
2341 cm_node->state = NES_CM_STATE_SYN_SENT;
2342 ret = send_syn(cm_node, 0, NULL);
2345 /* error in sending the syn free up the cm_node struct */
2346 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2347 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2348 cm_node->rem_addr, cm_node->rem_port, cm_node,
2350 rem_ref_cm_node(cm_node->cm_core, cm_node);
2355 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2356 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2357 cm_node->rem_addr, cm_node->rem_port, cm_node,
2366 * mini_cm_accept - accept a connection
2367 * This function is never called
2369 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2376 * mini_cm_reject - reject and teardown a connection
2378 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2383 struct nes_cm_event event;
2384 struct iw_cm_id *cm_id = cm_node->cm_id;
2385 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2387 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2388 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2390 if (cm_node->tcp_cntxt.client)
2392 cleanup_retrans_entry(cm_node);
2395 passive_state = atomic_add_return(1, &cm_node->passive_state);
2396 if (passive_state == NES_SEND_RESET_EVENT) {
2397 cm_node->state = NES_CM_STATE_CLOSED;
2398 rem_ref_cm_node(cm_core, cm_node);
2400 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2401 rem_ref_cm_node(cm_core, cm_node);
2403 ret = send_mpa_reject(cm_node);
2405 cm_node->state = NES_CM_STATE_CLOSED;
2406 err = send_reset(cm_node, NULL);
2410 cm_id->add_ref(cm_id);
2415 cm_node->cm_id = NULL;
2416 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2417 rem_ref_cm_node(cm_core, cm_node);
2418 rem_ref_cm_node(cm_core, loopback);
2420 event.cm_node = loopback;
2421 event.cm_info.rem_addr = loopback->rem_addr;
2422 event.cm_info.loc_addr = loopback->loc_addr;
2423 event.cm_info.rem_port = loopback->rem_port;
2424 event.cm_info.loc_port = loopback->loc_port;
2425 event.cm_info.cm_id = loopback->cm_id;
2426 cm_event_mpa_reject(&event);
2427 rem_ref_cm_node(cm_core, cm_node);
2428 loopback->state = NES_CM_STATE_CLOSING;
2430 cm_id = loopback->cm_id;
2431 rem_ref_cm_node(cm_core, loopback);
2432 cm_id->rem_ref(cm_id);
2443 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2447 if (!cm_core || !cm_node)
2450 switch (cm_node->state) {
2451 case NES_CM_STATE_SYN_RCVD:
2452 case NES_CM_STATE_SYN_SENT:
2453 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2454 case NES_CM_STATE_ESTABLISHED:
2455 case NES_CM_STATE_ACCEPTING:
2456 case NES_CM_STATE_MPAREQ_SENT:
2457 case NES_CM_STATE_MPAREQ_RCVD:
2458 cleanup_retrans_entry(cm_node);
2459 send_reset(cm_node, NULL);
2461 case NES_CM_STATE_CLOSE_WAIT:
2462 cm_node->state = NES_CM_STATE_LAST_ACK;
2463 send_fin(cm_node, NULL);
2465 case NES_CM_STATE_FIN_WAIT1:
2466 case NES_CM_STATE_FIN_WAIT2:
2467 case NES_CM_STATE_LAST_ACK:
2468 case NES_CM_STATE_TIME_WAIT:
2469 case NES_CM_STATE_CLOSING:
2472 case NES_CM_STATE_LISTENING:
2473 cleanup_retrans_entry(cm_node);
2474 send_reset(cm_node, NULL);
2476 case NES_CM_STATE_MPAREJ_RCVD:
2477 case NES_CM_STATE_UNKNOWN:
2478 case NES_CM_STATE_INITED:
2479 case NES_CM_STATE_CLOSED:
2480 case NES_CM_STATE_LISTENER_DESTROYED:
2481 ret = rem_ref_cm_node(cm_core, cm_node);
2483 case NES_CM_STATE_TSA:
2484 if (cm_node->send_entry)
2485 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2486 "send_entry=%p\n", cm_node->send_entry);
2487 ret = rem_ref_cm_node(cm_core, cm_node);
2495 * recv_pkt - recv an ETHERNET packet, and process it through CM
2496 * node state machine
2498 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2499 struct nes_vnic *nesvnic, struct sk_buff *skb)
2501 struct nes_cm_node *cm_node = NULL;
2502 struct nes_cm_listener *listener = NULL;
2504 struct tcphdr *tcph;
2505 struct nes_cm_info nfo;
2506 int skb_handled = 1;
2507 __be32 tmp_daddr, tmp_saddr;
2511 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2514 iph = (struct iphdr *)skb->data;
2515 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2517 nfo.loc_addr = ntohl(iph->daddr);
2518 nfo.loc_port = ntohs(tcph->dest);
2519 nfo.rem_addr = ntohl(iph->saddr);
2520 nfo.rem_port = ntohs(tcph->source);
2522 tmp_daddr = cpu_to_be32(iph->daddr);
2523 tmp_saddr = cpu_to_be32(iph->saddr);
2525 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2526 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2529 cm_node = find_node(cm_core,
2530 nfo.rem_port, nfo.rem_addr,
2531 nfo.loc_port, nfo.loc_addr);
2534 /* Only type of packet accepted are for */
2535 /* the PASSIVE open (syn only) */
2536 if ((!tcph->syn) || (tcph->ack)) {
2540 listener = find_listener(cm_core, nfo.loc_addr,
2542 NES_CM_LISTENER_ACTIVE_STATE);
2546 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2550 nfo.cm_id = listener->cm_id;
2551 nfo.conn_type = listener->conn_type;
2552 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2555 nes_debug(NES_DBG_CM, "Unable to allocate "
2557 cm_packets_dropped++;
2558 atomic_dec(&listener->ref_count);
2559 dev_kfree_skb_any(skb);
2562 if (!tcph->rst && !tcph->fin) {
2563 cm_node->state = NES_CM_STATE_LISTENING;
2565 cm_packets_dropped++;
2566 rem_ref_cm_node(cm_core, cm_node);
2567 dev_kfree_skb_any(skb);
2570 add_ref_cm_node(cm_node);
2571 } else if (cm_node->state == NES_CM_STATE_TSA) {
2572 if (cm_node->nesqp->pau_mode)
2573 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2575 rem_ref_cm_node(cm_core, cm_node);
2576 atomic_inc(&cm_accel_dropped_pkts);
2577 dev_kfree_skb_any(skb);
2581 skb_reset_network_header(skb);
2582 skb_set_transport_header(skb, sizeof(*tcph));
2583 skb->len = ntohs(iph->tot_len);
2584 process_packet(cm_node, skb, cm_core);
2585 rem_ref_cm_node(cm_core, cm_node);
2592 * nes_cm_alloc_core - allocate a top level instance of a cm core
2594 static struct nes_cm_core *nes_cm_alloc_core(void)
2596 struct nes_cm_core *cm_core;
2598 /* setup the CM core */
2599 /* alloc top level core control structure */
2600 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2604 INIT_LIST_HEAD(&cm_core->connected_nodes);
2605 init_timer(&cm_core->tcp_timer);
2606 cm_core->tcp_timer.function = nes_cm_timer_tick;
2608 cm_core->mtu = NES_CM_DEFAULT_MTU;
2609 cm_core->state = NES_CM_STATE_INITED;
2610 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2612 atomic_set(&cm_core->events_posted, 0);
2614 cm_core->api = &nes_cm_api;
2616 spin_lock_init(&cm_core->ht_lock);
2617 spin_lock_init(&cm_core->listen_list_lock);
2619 INIT_LIST_HEAD(&cm_core->listen_list.list);
2621 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2623 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2624 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2625 cm_core->post_event = nes_cm_post_event;
2626 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2627 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2629 print_core(cm_core);
2635 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2637 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2639 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2646 if (timer_pending(&cm_core->tcp_timer))
2647 del_timer(&cm_core->tcp_timer);
2649 destroy_workqueue(cm_core->event_wq);
2650 destroy_workqueue(cm_core->disconn_wq);
2651 nes_debug(NES_DBG_CM, "\n");
2661 static int mini_cm_get(struct nes_cm_core *cm_core)
2663 return cm_core->state;
2670 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2675 case NES_CM_SET_PKT_SIZE:
2676 cm_core->mtu = value;
2678 case NES_CM_SET_FREE_PKT_Q_SIZE:
2679 cm_core->free_tx_pkt_max = value;
2682 /* unknown set option */
2691 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2692 * successfully exchanged when this is called
2694 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2701 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2702 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2703 NES_QPCONTEXT_MISC_DROS);
2705 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2706 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2708 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2710 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2712 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2713 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2715 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2716 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2717 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2719 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2720 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2721 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2723 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2724 nesqp->nesqp_context->ts_recent = 0;
2725 nesqp->nesqp_context->ts_age = 0;
2726 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2727 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2728 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2729 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2730 cm_node->tcp_cntxt.rcv_wscale);
2731 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2732 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2733 nesqp->nesqp_context->srtt = 0;
2734 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2735 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2736 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2737 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2738 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2739 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2741 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2742 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2743 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2744 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2745 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2746 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2747 le32_to_cpu(nesqp->nesqp_context->misc));
2748 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2749 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2750 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2752 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2753 cm_node->state = NES_CM_STATE_TSA;
2762 int nes_cm_disconn(struct nes_qp *nesqp)
2764 struct disconn_work *work;
2766 work = kzalloc(sizeof *work, GFP_ATOMIC);
2768 return -ENOMEM; /* Timer will clean up */
2770 nes_add_ref(&nesqp->ibqp);
2771 work->nesqp = nesqp;
2772 INIT_WORK(&work->work, nes_disconnect_worker);
2773 queue_work(g_cm_core->disconn_wq, &work->work);
2779 * nes_disconnect_worker
2781 static void nes_disconnect_worker(struct work_struct *work)
2783 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2784 struct nes_qp *nesqp = dwork->nesqp;
2787 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2788 nesqp->last_aeq, nesqp->hwqp.qp_id);
2789 nes_cm_disconn_true(nesqp);
2790 nes_rem_ref(&nesqp->ibqp);
2795 * nes_cm_disconn_true
2797 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2799 unsigned long flags;
2801 struct iw_cm_id *cm_id;
2802 struct iw_cm_event cm_event;
2803 struct nes_vnic *nesvnic;
2805 u8 original_hw_tcp_state;
2806 u8 original_ibqp_state;
2807 int disconn_status = 0;
2808 int issue_disconn = 0;
2809 int issue_close = 0;
2810 int issue_flush = 0;
2811 u32 flush_q = NES_CQP_FLUSH_RQ;
2812 struct ib_event ibevent;
2815 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2819 spin_lock_irqsave(&nesqp->lock, flags);
2820 cm_id = nesqp->cm_id;
2821 /* make sure we havent already closed this connection */
2823 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2825 spin_unlock_irqrestore(&nesqp->lock, flags);
2829 nesvnic = to_nesvnic(nesqp->ibqp.device);
2830 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2832 original_hw_tcp_state = nesqp->hw_tcp_state;
2833 original_ibqp_state = nesqp->ibqp_state;
2834 last_ae = nesqp->last_aeq;
2836 if (nesqp->term_flags) {
2839 nesqp->cm_id = NULL;
2840 del_timer(&nesqp->terminate_timer);
2841 if (nesqp->flush_issued == 0) {
2842 nesqp->flush_issued = 1;
2845 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2846 ((original_ibqp_state == IB_QPS_RTS) &&
2847 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2849 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2850 disconn_status = -ECONNRESET;
2853 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2854 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2855 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2856 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2858 nesqp->cm_id = NULL;
2859 if (nesqp->flush_issued == 0) {
2860 nesqp->flush_issued = 1;
2865 spin_unlock_irqrestore(&nesqp->lock, flags);
2867 if ((issue_flush) && (nesqp->destroyed == 0)) {
2868 /* Flush the queue(s) */
2869 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2870 flush_q |= NES_CQP_FLUSH_SQ;
2871 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2873 if (nesqp->term_flags) {
2874 ibevent.device = nesqp->ibqp.device;
2875 ibevent.event = nesqp->terminate_eventtype;
2876 ibevent.element.qp = &nesqp->ibqp;
2877 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2881 if ((cm_id) && (cm_id->event_handler)) {
2882 if (issue_disconn) {
2883 atomic_inc(&cm_disconnects);
2884 cm_event.event = IW_CM_EVENT_DISCONNECT;
2885 cm_event.status = disconn_status;
2886 cm_event.local_addr = cm_id->local_addr;
2887 cm_event.remote_addr = cm_id->remote_addr;
2888 cm_event.private_data = NULL;
2889 cm_event.private_data_len = 0;
2891 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2892 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2893 "cm_id = %p, refcount = %u.\n",
2894 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2895 nesqp->hwqp.sq_tail, cm_id,
2896 atomic_read(&nesqp->refcount));
2898 ret = cm_id->event_handler(cm_id, &cm_event);
2900 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2901 "returned, ret=%d\n", ret);
2905 atomic_inc(&cm_closes);
2906 nes_disconnect(nesqp, 1);
2908 cm_id->provider_data = nesqp;
2909 /* Send up the close complete event */
2910 cm_event.event = IW_CM_EVENT_CLOSE;
2911 cm_event.status = 0;
2912 cm_event.provider_data = cm_id->provider_data;
2913 cm_event.local_addr = cm_id->local_addr;
2914 cm_event.remote_addr = cm_id->remote_addr;
2915 cm_event.private_data = NULL;
2916 cm_event.private_data_len = 0;
2918 ret = cm_id->event_handler(cm_id, &cm_event);
2920 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2922 cm_id->rem_ref(cm_id);
2933 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2936 struct nes_vnic *nesvnic;
2937 struct nes_device *nesdev;
2938 struct nes_ib_device *nesibdev;
2940 nesvnic = to_nesvnic(nesqp->ibqp.device);
2944 nesdev = nesvnic->nesdev;
2945 nesibdev = nesvnic->nesibdev;
2947 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2948 netdev_refcnt_read(nesvnic->netdev));
2950 if (nesqp->active_conn) {
2952 /* indicate this connection is NOT active */
2953 nesqp->active_conn = 0;
2955 /* Need to free the Last Streaming Mode Message */
2956 if (nesqp->ietf_frame) {
2958 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2959 pci_free_consistent(nesdev->pcidev,
2960 nesqp->private_data_len + nesqp->ietf_frame_size,
2961 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2965 /* close the CM node down if it is still active */
2966 if (nesqp->cm_node) {
2967 nes_debug(NES_DBG_CM, "Call close API\n");
2969 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2979 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2983 struct nes_qp *nesqp;
2984 struct nes_vnic *nesvnic;
2985 struct nes_device *nesdev;
2986 struct nes_cm_node *cm_node;
2987 struct nes_adapter *adapter;
2988 struct ib_qp_attr attr;
2989 struct iw_cm_event cm_event;
2990 struct nes_hw_qp_wqe *wqe;
2991 struct nes_v4_quad nes_quad;
2995 struct nes_ib_device *nesibdev;
2996 struct ib_mr *ibmr = NULL;
2997 struct ib_phys_buf ibphysbuf;
2998 struct nes_pd *nespd;
3000 u8 mpa_frame_offset = 0;
3001 struct ietf_mpa_v2 *mpa_v2_frame;
3003 u8 *start_ptr = &start_addr;
3004 u8 **start_buff = &start_ptr;
3007 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3011 /* get all our handles */
3012 nesqp = to_nesqp(ibqp);
3013 nesvnic = to_nesvnic(nesqp->ibqp.device);
3014 nesdev = nesvnic->nesdev;
3015 adapter = nesdev->nesadapter;
3017 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3018 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3019 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3020 nesvnic->netdev->name);
3022 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3023 if (cm_node->loopbackpartner)
3024 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3025 rem_ref_cm_node(cm_node->cm_core, cm_node);
3029 passive_state = atomic_add_return(1, &cm_node->passive_state);
3030 if (passive_state == NES_SEND_RESET_EVENT) {
3031 rem_ref_cm_node(cm_node->cm_core, cm_node);
3035 /* associate the node with the QP */
3036 nesqp->cm_node = (void *)cm_node;
3037 cm_node->nesqp = nesqp;
3039 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3040 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3041 atomic_inc(&cm_accepts);
3043 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3044 netdev_refcnt_read(nesvnic->netdev));
3046 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3047 /* allocate the ietf frame and space for private data */
3048 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3049 nesqp->ietf_frame_size + conn_param->private_data_len,
3050 &nesqp->ietf_frame_pbase);
3052 if (!nesqp->ietf_frame) {
3053 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3056 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3058 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3059 mpa_frame_offset = 4;
3061 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3062 conn_param->private_data_len);
3064 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3065 nesqp->private_data_len = conn_param->private_data_len;
3067 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3068 wqe = &nesqp->hwqp.sq_vbase[0];
3070 if (cm_id->remote_addr.sin_addr.s_addr !=
3071 cm_id->local_addr.sin_addr.s_addr) {
3072 u64temp = (unsigned long)nesqp;
3073 nesibdev = nesvnic->nesibdev;
3074 nespd = nesqp->nespd;
3075 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3076 ibphysbuf.size = buff_len;
3077 tagged_offset = (u64)(unsigned long)*start_buff;
3078 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3080 IB_ACCESS_LOCAL_WRITE,
3083 nes_debug(NES_DBG_CM, "Unable to register memory region"
3084 "for lSMM for cm_node = %p \n",
3086 pci_free_consistent(nesdev->pcidev,
3087 nesqp->private_data_len + nesqp->ietf_frame_size,
3088 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3092 ibmr->pd = &nespd->ibpd;
3093 ibmr->device = nespd->ibpd.device;
3094 nesqp->lsmm_mr = ibmr;
3096 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3097 set_wqe_64bit_value(wqe->wqe_words,
3098 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3100 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3101 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3102 NES_IWARP_SQ_WQE_WRPDU);
3103 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3104 cpu_to_le32(buff_len);
3105 set_wqe_64bit_value(wqe->wqe_words,
3106 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3107 (u64)(unsigned long)(*start_buff));
3108 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3109 cpu_to_le32(buff_len);
3110 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3111 if (nesqp->sq_kmapped) {
3112 nesqp->sq_kmapped = 0;
3113 kunmap(nesqp->page);
3116 nesqp->nesqp_context->ird_ord_sizes |=
3117 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3118 NES_QPCONTEXT_ORDIRD_WRPDU);
3120 nesqp->nesqp_context->ird_ord_sizes |=
3121 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3123 nesqp->skip_lsmm = 1;
3126 /* Cache the cm_id in the qp */
3127 nesqp->cm_id = cm_id;
3128 cm_node->cm_id = cm_id;
3130 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3131 cm_id->provider_data = nesqp;
3132 nesqp->active_conn = 0;
3134 if (cm_node->state == NES_CM_STATE_TSA)
3135 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3138 nes_cm_init_tsa_conn(nesqp, cm_node);
3140 nesqp->nesqp_context->tcpPorts[0] =
3141 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3142 nesqp->nesqp_context->tcpPorts[1] =
3143 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3145 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3146 nesqp->nesqp_context->ip0 =
3147 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3149 nesqp->nesqp_context->ip0 =
3150 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3152 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3153 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3154 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3156 nesqp->nesqp_context->arp_index_vlan |=
3157 cpu_to_le32(nes_arp_table(nesdev,
3158 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3159 NES_ARP_RESOLVE) << 16);
3161 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3162 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3164 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3166 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3167 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3168 nesqp->nesqp_context->ird_ord_sizes |=
3169 cpu_to_le32((u32)conn_param->ord);
3171 memset(&nes_quad, 0, sizeof(nes_quad));
3172 nes_quad.DstIpAdrIndex =
3173 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3174 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3175 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3177 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3178 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3179 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3181 /* Produce hash key */
3182 crc_value = get_crc_value(&nes_quad);
3183 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3184 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3185 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3187 nesqp->hte_index &= adapter->hte_index_mask;
3188 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3190 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3192 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3193 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3194 "private data length=%u.\n", nesqp->hwqp.qp_id,
3195 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3196 ntohs(cm_id->remote_addr.sin_port),
3197 ntohl(cm_id->local_addr.sin_addr.s_addr),
3198 ntohs(cm_id->local_addr.sin_port),
3199 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3200 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3203 /* notify OF layer that accept event was successful */
3204 cm_id->add_ref(cm_id);
3205 nes_add_ref(&nesqp->ibqp);
3207 cm_event.event = IW_CM_EVENT_ESTABLISHED;
3208 cm_event.status = 0;
3209 cm_event.provider_data = (void *)nesqp;
3210 cm_event.local_addr = cm_id->local_addr;
3211 cm_event.remote_addr = cm_id->remote_addr;
3212 cm_event.private_data = NULL;
3213 cm_event.private_data_len = 0;
3214 ret = cm_id->event_handler(cm_id, &cm_event);
3215 attr.qp_state = IB_QPS_RTS;
3216 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3217 if (cm_node->loopbackpartner) {
3218 cm_node->loopbackpartner->mpa_frame_size =
3219 nesqp->private_data_len;
3220 /* copy entire MPA frame to our cm_node's frame */
3221 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3222 conn_param->private_data, conn_param->private_data_len);
3223 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3226 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3227 "ret=%d\n", __func__, __LINE__, ret);
3236 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3238 struct nes_cm_node *cm_node;
3239 struct nes_cm_node *loopback;
3240 struct nes_cm_core *cm_core;
3243 atomic_inc(&cm_rejects);
3244 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3245 loopback = cm_node->loopbackpartner;
3246 cm_core = cm_node->cm_core;
3247 cm_node->cm_id = cm_id;
3249 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3253 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3254 loopback->mpa_frame.priv_data_len = pdata_len;
3255 loopback->mpa_frame_size = pdata_len;
3257 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3258 cm_node->mpa_frame_size = pdata_len;
3259 memcpy(start_buff, pdata, pdata_len);
3261 return cm_core->api->reject(cm_core, cm_node);
3267 * setup and launch cm connect node
3269 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3272 struct nes_qp *nesqp;
3273 struct nes_vnic *nesvnic;
3274 struct nes_device *nesdev;
3275 struct nes_cm_node *cm_node;
3276 struct nes_cm_info cm_info;
3279 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3282 nesqp = to_nesqp(ibqp);
3285 nesvnic = to_nesvnic(nesqp->ibqp.device);
3288 nesdev = nesvnic->nesdev;
3292 if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3295 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3296 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3297 ntohl(nesvnic->local_ipaddr),
3298 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3299 ntohs(cm_id->remote_addr.sin_port),
3300 ntohl(cm_id->local_addr.sin_addr.s_addr),
3301 ntohs(cm_id->local_addr.sin_port));
3303 atomic_inc(&cm_connects);
3304 nesqp->active_conn = 1;
3306 /* cache the cm_id in the qp */
3307 nesqp->cm_id = cm_id;
3309 cm_id->provider_data = nesqp;
3311 nesqp->private_data_len = conn_param->private_data_len;
3312 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3313 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3314 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3315 conn_param->private_data_len);
3317 if (cm_id->local_addr.sin_addr.s_addr !=
3318 cm_id->remote_addr.sin_addr.s_addr) {
3319 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3320 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3324 /* set up the connection params for the node */
3325 cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3326 cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3327 cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3328 cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3329 cm_info.cm_id = cm_id;
3330 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3332 cm_id->add_ref(cm_id);
3334 /* create a connect CM node connection */
3335 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3336 conn_param->private_data_len, (void *)conn_param->private_data,
3340 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3341 PCI_FUNC(nesdev->pcidev->devfn),
3342 NES_MANAGE_APBVT_DEL);
3344 cm_id->rem_ref(cm_id);
3348 cm_node->apbvt_set = apbvt_set;
3349 nesqp->cm_node = cm_node;
3350 cm_node->nesqp = nesqp;
3351 nes_add_ref(&nesqp->ibqp);
3360 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3362 struct nes_vnic *nesvnic;
3363 struct nes_cm_listener *cm_node;
3364 struct nes_cm_info cm_info;
3367 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3368 cm_id, ntohs(cm_id->local_addr.sin_port));
3370 nesvnic = to_nesvnic(cm_id->device);
3374 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3375 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3377 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3378 nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3380 /* setup listen params in our api call struct */
3381 cm_info.loc_addr = nesvnic->local_ipaddr;
3382 cm_info.loc_port = cm_id->local_addr.sin_port;
3383 cm_info.backlog = backlog;
3384 cm_info.cm_id = cm_id;
3386 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3389 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3391 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3392 __func__, __LINE__);
3396 cm_id->provider_data = cm_node;
3398 if (!cm_node->reused_node) {
3399 err = nes_manage_apbvt(nesvnic,
3400 ntohs(cm_id->local_addr.sin_port),
3401 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3402 NES_MANAGE_APBVT_ADD);
3404 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3406 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3409 atomic_inc(&cm_listens_created);
3412 cm_id->add_ref(cm_id);
3413 cm_id->provider_data = (void *)cm_node;
3421 * nes_destroy_listen
3423 int nes_destroy_listen(struct iw_cm_id *cm_id)
3425 if (cm_id->provider_data)
3426 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3428 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3430 cm_id->rem_ref(cm_id);
3439 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3443 cm_packets_received++;
3444 if ((g_cm_core) && (g_cm_core->api))
3445 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3447 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3448 " cm is not setup properly.\n");
3456 * Start and init a cm core module
3458 int nes_cm_start(void)
3460 nes_debug(NES_DBG_CM, "\n");
3461 /* create the primary CM core, pass this handle to subsequent core inits */
3462 g_cm_core = nes_cm_alloc_core();
3472 * stop and dealloc all cm core instances
3474 int nes_cm_stop(void)
3476 g_cm_core->api->destroy_cm_core(g_cm_core);
3482 * cm_event_connected
3483 * handle a connected event, setup QPs and HW
3485 static void cm_event_connected(struct nes_cm_event *event)
3487 struct nes_qp *nesqp;
3488 struct nes_vnic *nesvnic;
3489 struct nes_device *nesdev;
3490 struct nes_cm_node *cm_node;
3491 struct nes_adapter *nesadapter;
3492 struct ib_qp_attr attr;
3493 struct iw_cm_id *cm_id;
3494 struct iw_cm_event cm_event;
3495 struct nes_v4_quad nes_quad;
3499 /* get all our handles */
3500 cm_node = event->cm_node;
3501 cm_id = cm_node->cm_id;
3502 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3503 nesqp = (struct nes_qp *)cm_id->provider_data;
3504 nesvnic = to_nesvnic(nesqp->ibqp.device);
3505 nesdev = nesvnic->nesdev;
3506 nesadapter = nesdev->nesadapter;
3508 if (nesqp->destroyed)
3510 atomic_inc(&cm_connecteds);
3511 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3512 " local port 0x%04X. jiffies = %lu.\n",
3514 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3515 ntohs(cm_id->remote_addr.sin_port),
3516 ntohs(cm_id->local_addr.sin_port),
3519 nes_cm_init_tsa_conn(nesqp, cm_node);
3521 /* set the QP tsa context */
3522 nesqp->nesqp_context->tcpPorts[0] =
3523 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3524 nesqp->nesqp_context->tcpPorts[1] =
3525 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3526 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3527 nesqp->nesqp_context->ip0 =
3528 cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3530 nesqp->nesqp_context->ip0 =
3531 cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3533 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3534 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3535 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3536 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3537 nes_arp_table(nesdev,
3538 le32_to_cpu(nesqp->nesqp_context->ip0),
3539 NULL, NES_ARP_RESOLVE) << 16);
3540 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3541 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3542 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3543 nesqp->nesqp_context->ird_ord_sizes |=
3544 cpu_to_le32((u32)1 <<
3545 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3547 /* Adjust tail for not having a LSMM */
3548 /*nesqp->hwqp.sq_tail = 1;*/
3550 build_rdma0_msg(cm_node, &nesqp);
3552 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3553 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3555 memset(&nes_quad, 0, sizeof(nes_quad));
3557 nes_quad.DstIpAdrIndex =
3558 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3559 if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3560 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3562 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3563 nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3564 nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3566 /* Produce hash key */
3567 crc_value = get_crc_value(&nes_quad);
3568 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3569 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3570 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3572 nesqp->hte_index &= nesadapter->hte_index_mask;
3573 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3575 nesqp->ietf_frame = &cm_node->mpa_frame;
3576 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3577 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3579 /* notify OF layer we successfully created the requested connection */
3580 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3581 cm_event.status = 0;
3582 cm_event.provider_data = cm_id->provider_data;
3583 cm_event.local_addr.sin_family = AF_INET;
3584 cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3585 cm_event.remote_addr = cm_id->remote_addr;
3587 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3588 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3589 cm_event.ird = cm_node->ird_size;
3590 cm_event.ord = cm_node->ord_size;
3592 cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3593 ret = cm_id->event_handler(cm_id, &cm_event);
3594 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3597 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3598 "ret=%d\n", __func__, __LINE__, ret);
3599 attr.qp_state = IB_QPS_RTS;
3600 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3602 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3603 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3610 * cm_event_connect_error
3612 static void cm_event_connect_error(struct nes_cm_event *event)
3614 struct nes_qp *nesqp;
3615 struct iw_cm_id *cm_id;
3616 struct iw_cm_event cm_event;
3617 /* struct nes_cm_info cm_info; */
3620 if (!event->cm_node)
3623 cm_id = event->cm_node->cm_id;
3627 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3628 nesqp = cm_id->provider_data;
3633 /* notify OF layer about this connection error event */
3634 /* cm_id->rem_ref(cm_id); */
3635 nesqp->cm_id = NULL;
3636 cm_id->provider_data = NULL;
3637 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3638 cm_event.status = -ECONNRESET;
3639 cm_event.provider_data = cm_id->provider_data;
3640 cm_event.local_addr = cm_id->local_addr;
3641 cm_event.remote_addr = cm_id->remote_addr;
3642 cm_event.private_data = NULL;
3643 cm_event.private_data_len = 0;
3645 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3646 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3647 cm_event.remote_addr.sin_addr.s_addr);
3649 ret = cm_id->event_handler(cm_id, &cm_event);
3650 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3652 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3653 "ret=%d\n", __func__, __LINE__, ret);
3654 cm_id->rem_ref(cm_id);
3656 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3664 static void cm_event_reset(struct nes_cm_event *event)
3666 struct nes_qp *nesqp;
3667 struct iw_cm_id *cm_id;
3668 struct iw_cm_event cm_event;
3669 /* struct nes_cm_info cm_info; */
3672 if (!event->cm_node)
3675 if (!event->cm_node->cm_id)
3678 cm_id = event->cm_node->cm_id;
3680 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3681 nesqp = cm_id->provider_data;
3685 nesqp->cm_id = NULL;
3686 /* cm_id->provider_data = NULL; */
3687 cm_event.event = IW_CM_EVENT_DISCONNECT;
3688 cm_event.status = -ECONNRESET;
3689 cm_event.provider_data = cm_id->provider_data;
3690 cm_event.local_addr = cm_id->local_addr;
3691 cm_event.remote_addr = cm_id->remote_addr;
3692 cm_event.private_data = NULL;
3693 cm_event.private_data_len = 0;
3695 cm_id->add_ref(cm_id);
3696 ret = cm_id->event_handler(cm_id, &cm_event);
3697 atomic_inc(&cm_closes);
3698 cm_event.event = IW_CM_EVENT_CLOSE;
3699 cm_event.status = 0;
3700 cm_event.provider_data = cm_id->provider_data;
3701 cm_event.local_addr = cm_id->local_addr;
3702 cm_event.remote_addr = cm_id->remote_addr;
3703 cm_event.private_data = NULL;
3704 cm_event.private_data_len = 0;
3705 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3706 ret = cm_id->event_handler(cm_id, &cm_event);
3708 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3711 /* notify OF layer about this connection error event */
3712 cm_id->rem_ref(cm_id);
3721 static void cm_event_mpa_req(struct nes_cm_event *event)
3723 struct iw_cm_id *cm_id;
3724 struct iw_cm_event cm_event;
3726 struct nes_cm_node *cm_node;
3728 cm_node = event->cm_node;
3731 cm_id = cm_node->cm_id;
3733 atomic_inc(&cm_connect_reqs);
3734 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3735 cm_node, cm_id, jiffies);
3737 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3738 cm_event.status = 0;
3739 cm_event.provider_data = (void *)cm_node;
3741 cm_event.local_addr.sin_family = AF_INET;
3742 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3743 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3745 cm_event.remote_addr.sin_family = AF_INET;
3746 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3747 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3748 cm_event.private_data = cm_node->mpa_frame_buf;
3749 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3750 cm_event.ird = cm_node->ird_size;
3751 cm_event.ord = cm_node->ord_size;
3753 ret = cm_id->event_handler(cm_id, &cm_event);
3755 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3756 __func__, __LINE__, ret);
3761 static void cm_event_mpa_reject(struct nes_cm_event *event)
3763 struct iw_cm_id *cm_id;
3764 struct iw_cm_event cm_event;
3765 struct nes_cm_node *cm_node;
3768 cm_node = event->cm_node;
3771 cm_id = cm_node->cm_id;
3773 atomic_inc(&cm_connect_reqs);
3774 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3775 cm_node, cm_id, jiffies);
3777 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3778 cm_event.status = -ECONNREFUSED;
3779 cm_event.provider_data = cm_id->provider_data;
3781 cm_event.local_addr.sin_family = AF_INET;
3782 cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3783 cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3785 cm_event.remote_addr.sin_family = AF_INET;
3786 cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3787 cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3789 cm_event.private_data = cm_node->mpa_frame_buf;
3790 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3792 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3793 "remove_addr=%08x\n",
3794 cm_event.local_addr.sin_addr.s_addr,
3795 cm_event.remote_addr.sin_addr.s_addr);
3797 ret = cm_id->event_handler(cm_id, &cm_event);
3799 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3800 __func__, __LINE__, ret);
3806 static void nes_cm_event_handler(struct work_struct *);
3810 * post an event to the cm event handler
3812 static int nes_cm_post_event(struct nes_cm_event *event)
3814 atomic_inc(&event->cm_node->cm_core->events_posted);
3815 add_ref_cm_node(event->cm_node);
3816 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3817 INIT_WORK(&event->event_work, nes_cm_event_handler);
3818 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3819 event->cm_node, event);
3821 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3823 nes_debug(NES_DBG_CM, "Exit\n");
3829 * nes_cm_event_handler
3830 * worker function to handle cm events
3831 * will free instance of nes_cm_event
3833 static void nes_cm_event_handler(struct work_struct *work)
3835 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3837 struct nes_cm_core *cm_core;
3839 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3842 cm_core = event->cm_node->cm_core;
3843 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3844 event, event->type, atomic_read(&cm_core->events_posted));
3846 switch (event->type) {
3847 case NES_CM_EVENT_MPA_REQ:
3848 cm_event_mpa_req(event);
3849 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3852 case NES_CM_EVENT_RESET:
3853 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3855 cm_event_reset(event);
3857 case NES_CM_EVENT_CONNECTED:
3858 if ((!event->cm_node->cm_id) ||
3859 (event->cm_node->state != NES_CM_STATE_TSA))
3861 cm_event_connected(event);
3862 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3864 case NES_CM_EVENT_MPA_REJECT:
3865 if ((!event->cm_node->cm_id) ||
3866 (event->cm_node->state == NES_CM_STATE_TSA))
3868 cm_event_mpa_reject(event);
3869 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3872 case NES_CM_EVENT_ABORTED:
3873 if ((!event->cm_node->cm_id) ||
3874 (event->cm_node->state == NES_CM_STATE_TSA))
3876 cm_event_connect_error(event);
3877 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3879 case NES_CM_EVENT_DROPPED_PKT:
3880 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3883 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3887 atomic_dec(&cm_core->events_posted);
3888 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3889 rem_ref_cm_node(cm_core, event->cm_node);