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RDMA/nes: Add support for iWARP Port Mapper user space service
[deliverable/linux.git] / drivers / infiniband / hw / nes / nes_cm.c
CommitLineData
3c2d774c 1/*
5647263c 2 * Copyright (c) 2006 - 2014 Intel Corporation. All rights reserved.
3c2d774c
GS		 3 *
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:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
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.
22 *
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
30 * SOFTWARE.
31 *
32 */
33
34
35#define TCPOPT_TIMESTAMP 8
36
60063497 37#include <linux/atomic.h>
3c2d774c
GS		 38#include <linux/skbuff.h>
39#include <linux/ip.h>
40#include <linux/tcp.h>
41#include <linux/init.h>
42#include <linux/if_arp.h>
f2b2b59b 43#include <linux/if_vlan.h>
3c2d774c
GS		 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>
d2fa9b26 55#include <linux/highmem.h>
5a0e3ad6 56#include <linux/slab.h>
7191a0a1 57#include <net/arp.h>
3c2d774c
GS		 58#include <net/neighbour.h>
59#include <net/route.h>
60#include <net/ip_fib.h>
c11470f9 61#include <net/tcp.h>
5647263c 62#include <linux/fcntl.h>
3c2d774c
GS		 63
64#include "nes.h"
65
66u32 cm_packets_sent;
67u32 cm_packets_bounced;
68u32 cm_packets_dropped;
69u32 cm_packets_retrans;
70u32 cm_packets_created;
71u32 cm_packets_received;
6e10d2e4
FL		 72atomic_t cm_listens_created;
73atomic_t cm_listens_destroyed;
3c2d774c
GS		 74u32 cm_backlog_drops;
75atomic_t cm_loopbacks;
76atomic_t cm_nodes_created;
77atomic_t cm_nodes_destroyed;
78atomic_t cm_accel_dropped_pkts;
79atomic_t cm_resets_recvd;
80
615eb715
TN		 81static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
82static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *);
3c2d774c 83static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
615eb715 84static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, struct nes_vnic *, u16, void *, struct nes_cm_info *);
6492cdf3 85static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
615eb715
TN		 86static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *);
87static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
88static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
1a855fbf
RD		 89static int mini_cm_dealloc_core(struct nes_cm_core *);
90static int mini_cm_get(struct nes_cm_core *);
91static int mini_cm_set(struct nes_cm_core *, u32, u32);
6492cdf3 92
615eb715 93static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
6492cdf3
FL		 94static int add_ref_cm_node(struct nes_cm_node *);
95static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
96
1a855fbf
RD		 97static int nes_cm_disconn_true(struct nes_qp *);
98static int nes_cm_post_event(struct nes_cm_event *event);
99static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
100static void nes_disconnect_worker(struct work_struct *work);
6492cdf3
FL		 101
102static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
9d5ab133 103static int send_mpa_reject(struct nes_cm_node *);
6492cdf3
FL		 104static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
105static int send_reset(struct nes_cm_node *, struct sk_buff *);
106static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
1a855fbf 107static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
615eb715 108static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
6492cdf3
FL		 109
110static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
111static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
112static void cleanup_retrans_entry(struct nes_cm_node *);
9d5ab133 113static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
6492cdf3 114static void free_retrans_entry(struct nes_cm_node *cm_node);
615eb715 115static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
6492cdf3
FL		 116
117/* CM event handler functions */
118static void cm_event_connected(struct nes_cm_event *);
119static void cm_event_connect_error(struct nes_cm_event *);
120static void cm_event_reset(struct nes_cm_event *);
121static void cm_event_mpa_req(struct nes_cm_event *);
9d5ab133
FL		 122static void cm_event_mpa_reject(struct nes_cm_event *);
123static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
6492cdf3 124
615eb715
TN		 125/* MPA build functions */
126static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
127static void build_mpa_v2(struct nes_cm_node *, void *, u8);
128static void build_mpa_v1(struct nes_cm_node *, void *, u8);
129static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
130
6492cdf3 131static void print_core(struct nes_cm_core *core);
4ac79a70 132static void record_ird_ord(struct nes_cm_node *, u16, u16);
3c2d774c
GS		 133
134/* External CM API Interface */
135/* instance of function pointers for client API */
136/* set address of this instance to cm_core->cm_ops at cm_core alloc */
137static struct nes_cm_ops nes_cm_api = {
138 mini_cm_accelerated,
139 mini_cm_listen,
140 mini_cm_del_listen,
141 mini_cm_connect,
142 mini_cm_close,
143 mini_cm_accept,
144 mini_cm_reject,
145 mini_cm_recv_pkt,
146 mini_cm_dealloc_core,
147 mini_cm_get,
148 mini_cm_set
149};
150
1a855fbf 151static struct nes_cm_core *g_cm_core;
3c2d774c
GS		 152
153atomic_t cm_connects;
154atomic_t cm_accepts;
155atomic_t cm_disconnects;
156atomic_t cm_closes;
157atomic_t cm_connecteds;
158atomic_t cm_connect_reqs;
159atomic_t cm_rejects;
160
0f0bee8b
FL		 161int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
162{
163 return add_ref_cm_node(cm_node);
164}
165
166int nes_rem_ref_cm_node(struct nes_cm_node *cm_node)
167{
168 return rem_ref_cm_node(cm_node->cm_core, cm_node);
169}
3c2d774c
GS		 170/**
171 * create_event
172 */
615eb715
TN		 173static struct nes_cm_event *create_event(struct nes_cm_node * cm_node,
174 enum nes_cm_event_type type)
3c2d774c
GS		 175{
176 struct nes_cm_event *event;
177
178 if (!cm_node->cm_id)
179 return NULL;
180
181 /* allocate an empty event */
182 event = kzalloc(sizeof(*event), GFP_ATOMIC);
183
184 if (!event)
185 return NULL;
186
187 event->type = type;
188 event->cm_node = cm_node;
189 event->cm_info.rem_addr = cm_node->rem_addr;
190 event->cm_info.loc_addr = cm_node->loc_addr;
191 event->cm_info.rem_port = cm_node->rem_port;
192 event->cm_info.loc_port = cm_node->loc_port;
193 event->cm_info.cm_id = cm_node->cm_id;
194
6492cdf3 195 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
615eb715
TN		 196 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
197 cm_node, event, type, event->cm_info.loc_addr,
198 event->cm_info.loc_port, event->cm_info.rem_addr,
199 event->cm_info.rem_port);
3c2d774c
GS		 200
201 nes_cm_post_event(event);
202 return event;
203}
204
205
206/**
207 * send_mpa_request
208 */
6492cdf3 209static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c 210{
615eb715
TN		 211 u8 start_addr = 0;
212 u8 *start_ptr = &start_addr;
213 u8 **start_buff = &start_ptr;
214 u16 buff_len = 0;
215
3c2d774c 216 if (!skb) {
6492cdf3 217 nes_debug(NES_DBG_CM, "skb set to NULL\n");
3c2d774c
GS		 218 return -1;
219 }
220
221 /* send an MPA Request frame */
615eb715
TN		 222 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REQUEST);
223 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK);
3c2d774c 224
9d5ab133
FL		 225 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
226}
3c2d774c 227
9d5ab133
FL		 228
229
230static int send_mpa_reject(struct nes_cm_node *cm_node)
231{
615eb715
TN		 232 struct sk_buff *skb = NULL;
233 u8 start_addr = 0;
234 u8 *start_ptr = &start_addr;
235 u8 **start_buff = &start_ptr;
236 u16 buff_len = 0;
81f99dcc 237 struct ietf_mpa_v1 *mpa_frame;
9d5ab133
FL		 238
239 skb = dev_alloc_skb(MAX_CM_BUFFER);
240 if (!skb) {
241 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
242 return -ENOMEM;
243 }
244
245 /* send an MPA reject frame */
615eb715 246 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY);
81f99dcc
TN		 247 mpa_frame = (struct ietf_mpa_v1 *)*start_buff;
248 mpa_frame->flags |= IETF_MPA_FLAGS_REJECT;
615eb715 249 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN);
9d5ab133
FL		 250
251 cm_node->state = NES_CM_STATE_FIN_WAIT1;
252 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
3c2d774c
GS		 253}
254
255
256/**
257 * recv_mpa - process a received TCP pkt, we are expecting an
258 * IETF MPA frame
259 */
9d5ab133 260static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
615eb715 261 u32 len)
3c2d774c 262{
615eb715
TN		 263 struct ietf_mpa_v1 *mpa_frame;
264 struct ietf_mpa_v2 *mpa_v2_frame;
265 struct ietf_rtr_msg *rtr_msg;
266 int mpa_hdr_len;
267 int priv_data_len;
3c2d774c 268
9d5ab133
FL		 269 *type = NES_MPA_REQUEST_ACCEPT;
270
3c2d774c 271 /* assume req frame is in tcp data payload */
615eb715 272 if (len < sizeof(struct ietf_mpa_v1)) {
3c2d774c 273 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
9d5ab133 274 return -EINVAL;
3c2d774c
GS		 275 }
276
615eb715
TN		 277 /* points to the beginning of the frame, which could be MPA V1 or V2 */
278 mpa_frame = (struct ietf_mpa_v1 *)buffer;
279 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
280 priv_data_len = ntohs(mpa_frame->priv_data_len);
281
1cf078c9 282 /* make sure mpa private data len is less than 512 bytes */
615eb715 283 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
1cf078c9 284 nes_debug(NES_DBG_CM, "The received Length of Private"
615eb715 285 " Data field exceeds 512 octets\n");
1cf078c9
FL		 286 return -EINVAL;
287 }
288 /*
289 * make sure MPA receiver interoperate with the
290 * received MPA version and MPA key information
291 *
292 */
615eb715
TN		 293 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
294 nes_debug(NES_DBG_CM, "The received mpa version"
295 " is not supported\n");
296 return -EINVAL;
297 }
298 /*
299 * backwards compatibility only
300 */
301 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
1cf078c9 302 nes_debug(NES_DBG_CM, "The received mpa version"
615eb715 303 " can not be interoperated\n");
1cf078c9 304 return -EINVAL;
615eb715
TN		 305 } else {
306 cm_node->mpa_frame_rev = mpa_frame->rev;
1cf078c9 307 }
615eb715 308
1cf078c9
FL		 309 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
310 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
311 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
312 return -EINVAL;
313 }
314 } else {
315 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
316 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
317 return -EINVAL;
318 }
319 }
3c2d774c 320
615eb715 321 if (priv_data_len + mpa_hdr_len != len) {
3c2d774c 322 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
615eb715
TN		 323 " complete (%x + %x != %x)\n",
324 priv_data_len, mpa_hdr_len, len);
9d5ab133
FL		 325 return -EINVAL;
326 }
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"
615eb715
TN		 330 " (%x + %x != %x)\n",
331 priv_data_len, mpa_hdr_len, len);
9d5ab133 332 return -EINVAL;
3c2d774c
GS		 333 }
334
615eb715
TN		 335 cm_node->mpa_frame_size = priv_data_len;
336
337 switch (mpa_frame->rev) {
338 case IETF_MPA_V2: {
339 u16 ird_size;
340 u16 ord_size;
8dd87fba
TN		 341 u16 rtr_ctrl_ird;
342 u16 rtr_ctrl_ord;
343
615eb715
TN		 344 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
345 mpa_hdr_len += IETF_RTR_MSG_SIZE;
346 cm_node->mpa_frame_size -= IETF_RTR_MSG_SIZE;
347 rtr_msg = &mpa_v2_frame->rtr_msg;
348
349 /* parse rtr message */
8dd87fba
TN		 350 rtr_ctrl_ird = ntohs(rtr_msg->ctrl_ird);
351 rtr_ctrl_ord = ntohs(rtr_msg->ctrl_ord);
352 ird_size = rtr_ctrl_ird & IETF_NO_IRD_ORD;
353 ord_size = rtr_ctrl_ord & IETF_NO_IRD_ORD;
615eb715 354
8dd87fba 355 if (!(rtr_ctrl_ird & IETF_PEER_TO_PEER)) {
615eb715
TN		 356 /* send reset */
357 return -EINVAL;
358 }
4ac79a70
TN		 359 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD)
360 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
615eb715 361
4ac79a70 362 if (cm_node->mpav2_ird_ord != IETF_NO_IRD_ORD) {
615eb715 363 /* responder */
4ac79a70
TN		 364 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
365 /* we are still negotiating */
366 if (ord_size > NES_MAX_IRD) {
367 cm_node->ird_size = NES_MAX_IRD;
368 } else {
369 cm_node->ird_size = ord_size;
370 if (ord_size == 0 &&
371 (rtr_ctrl_ord & IETF_RDMA0_READ)) {
372 cm_node->ird_size = 1;
373 nes_debug(NES_DBG_CM,
374 "%s: Remote peer doesn't support RDMA0_READ (ord=%u)\n",
375 __func__, ord_size);
376 }
377 }
378 if (ird_size > NES_MAX_ORD)
379 cm_node->ord_size = NES_MAX_ORD;
380 else
381 cm_node->ord_size = ird_size;
382 } else { /* initiator */
383 if (ord_size > NES_MAX_IRD) {
384 nes_debug(NES_DBG_CM,
385 "%s: Unable to support the requested (ord =%u)\n",
386 __func__, ord_size);
387 return -EINVAL;
388 }
389 cm_node->ird_size = ord_size;
390
391 if (ird_size > NES_MAX_ORD) {
392 cm_node->ord_size = NES_MAX_ORD;
393 } else {
394 if (ird_size == 0 &&
395 (rtr_ctrl_ord & IETF_RDMA0_READ)) {
396 nes_debug(NES_DBG_CM,
397 "%s: Remote peer doesn't support RDMA0_READ (ird=%u)\n",
398 __func__, ird_size);
399 return -EINVAL;
400 } else {
401 cm_node->ord_size = ird_size;
402 }
403 }
615eb715
TN		 404 }
405 }
406
8dd87fba 407 if (rtr_ctrl_ord & IETF_RDMA0_READ) {
615eb715 408 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
4ac79a70 409
8dd87fba 410 } else if (rtr_ctrl_ord & IETF_RDMA0_WRITE) {
615eb715
TN		 411 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
412 } else { /* Not supported RDMA0 operation */
413 return -EINVAL;
414 }
415 break;
416 }
417 case IETF_MPA_V1:
418 default:
419 break;
420 }
421
3c2d774c 422 /* copy entire MPA frame to our cm_node's frame */
615eb715 423 memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size);
3c2d774c 424
9d5ab133
FL		 425 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
426 *type = NES_MPA_REQUEST_REJECT;
3c2d774c
GS		 427 return 0;
428}
429
430
3c2d774c
GS		 431/**
432 * form_cm_frame - get a free packet and build empty frame Use
433 * node info to build.
434 */
6098d107 435static void form_cm_frame(struct sk_buff *skb,
615eb715
TN		 436 struct nes_cm_node *cm_node, void *options, u32 optionsize,
437 void *data, u32 datasize, u8 flags)
3c2d774c
GS		 438{
439 struct tcphdr *tcph;
440 struct iphdr *iph;
441 struct ethhdr *ethh;
442 u8 *buf;
443 u16 packetsize = sizeof(*iph);
444
445 packetsize += sizeof(*tcph);
615eb715 446 packetsize += optionsize + datasize;
3c2d774c 447
615eb715 448 skb_trim(skb, 0);
3c2d774c
GS		 449 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
450
3c2d774c
GS		 451 buf = skb_put(skb, packetsize + ETH_HLEN);
452
615eb715 453 ethh = (struct ethhdr *)buf;
3c2d774c
GS		 454 buf += ETH_HLEN;
455
456 iph = (struct iphdr *)buf;
457 buf += sizeof(*iph);
458 tcph = (struct tcphdr *)buf;
459 skb_reset_mac_header(skb);
460 skb_set_network_header(skb, ETH_HLEN);
615eb715 461 skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph));
3c2d774c
GS		 462 buf += sizeof(*tcph);
463
464 skb->ip_summed = CHECKSUM_PARTIAL;
fc4ba729
TN		 465 if (!(cm_node->netdev->features & NETIF_F_IP_CSUM))
466 skb->ip_summed = CHECKSUM_NONE;
3c2d774c
GS		 467 skb->protocol = htons(0x800);
468 skb->data_len = 0;
469 skb->mac_len = ETH_HLEN;
470
471 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
472 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
473 ethh->h_proto = htons(0x0800);
474
475 iph->version = IPVERSION;
615eb715 476 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
3c2d774c
GS		 477 iph->tos = 0;
478 iph->tot_len = htons(packetsize);
479 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
480
481 iph->frag_off = htons(0x4000);
482 iph->ttl = 0x40;
615eb715 483 iph->protocol = 0x06; /* IPPROTO_TCP */
3c2d774c 484
5647263c
TN		 485 iph->saddr = htonl(cm_node->mapped_loc_addr);
486 iph->daddr = htonl(cm_node->mapped_rem_addr);
3c2d774c 487
5647263c
TN		 488 tcph->source = htons(cm_node->mapped_loc_port);
489 tcph->dest = htons(cm_node->mapped_rem_port);
3c2d774c
GS		 490 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
491
492 if (flags & SET_ACK) {
493 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
494 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
495 tcph->ack = 1;
615eb715 496 } else {
3c2d774c 497 tcph->ack_seq = 0;
615eb715 498 }
3c2d774c
GS		 499
500 if (flags & SET_SYN) {
501 cm_node->tcp_cntxt.loc_seq_num++;
502 tcph->syn = 1;
615eb715 503 } else {
6492cdf3 504 cm_node->tcp_cntxt.loc_seq_num += datasize;
615eb715 505 }
3c2d774c 506
6492cdf3
FL		 507 if (flags & SET_FIN) {
508 cm_node->tcp_cntxt.loc_seq_num++;
3c2d774c 509 tcph->fin = 1;
6492cdf3 510 }
3c2d774c
GS		 511
512 if (flags & SET_RST)
513 tcph->rst = 1;
514
515 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
516 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
517 tcph->urg_ptr = 0;
518 if (optionsize)
519 memcpy(buf, options, optionsize);
520 buf += optionsize;
521 if (datasize)
522 memcpy(buf, data, datasize);
523
524 skb_shinfo(skb)->nr_frags = 0;
525 cm_packets_created++;
3c2d774c
GS		 526}
527
5647263c
TN		 528/*
529 * nes_create_sockaddr - Record ip addr and tcp port in a sockaddr struct
530 */
531static void nes_create_sockaddr(__be32 ip_addr, __be16 port,
532 struct sockaddr_storage *addr)
533{
534 struct sockaddr_in *nes_sockaddr = (struct sockaddr_in *)addr;
535 nes_sockaddr->sin_family = AF_INET;
536 memcpy(&nes_sockaddr->sin_addr.s_addr, &ip_addr, sizeof(__be32));
537 nes_sockaddr->sin_port = port;
538}
539
540/*
541 * nes_create_mapinfo - Create a mapinfo object in the port mapper data base
542 */
543static int nes_create_mapinfo(struct nes_cm_info *cm_info)
544{
545 struct sockaddr_storage local_sockaddr;
546 struct sockaddr_storage mapped_sockaddr;
547
548 nes_create_sockaddr(htonl(cm_info->loc_addr), htons(cm_info->loc_port),
549 &local_sockaddr);
550 nes_create_sockaddr(htonl(cm_info->mapped_loc_addr),
551 htons(cm_info->mapped_loc_port), &mapped_sockaddr);
552
553 return iwpm_create_mapinfo(&local_sockaddr,
554 &mapped_sockaddr, RDMA_NL_NES);
555}
556
557/*
558 * nes_remove_mapinfo - Remove a mapinfo object from the port mapper data base
559 * and send a remove mapping op message to
560 * the userspace port mapper
561 */
562static int nes_remove_mapinfo(u32 loc_addr, u16 loc_port,
563 u32 mapped_loc_addr, u16 mapped_loc_port)
564{
565 struct sockaddr_storage local_sockaddr;
566 struct sockaddr_storage mapped_sockaddr;
567
568 nes_create_sockaddr(htonl(loc_addr), htons(loc_port), &local_sockaddr);
569 nes_create_sockaddr(htonl(mapped_loc_addr), htons(mapped_loc_port),
570 &mapped_sockaddr);
571
572 iwpm_remove_mapinfo(&local_sockaddr, &mapped_sockaddr);
573 return iwpm_remove_mapping(&local_sockaddr, RDMA_NL_NES);
574}
575
576/*
577 * nes_form_pm_msg - Form a port mapper message with mapping info
578 */
579static void nes_form_pm_msg(struct nes_cm_info *cm_info,
580 struct iwpm_sa_data *pm_msg)
581{
582 nes_create_sockaddr(htonl(cm_info->loc_addr), htons(cm_info->loc_port),
583 &pm_msg->loc_addr);
584 nes_create_sockaddr(htonl(cm_info->rem_addr), htons(cm_info->rem_port),
585 &pm_msg->rem_addr);
586}
587
588/*
589 * nes_form_reg_msg - Form a port mapper message with dev info
590 */
591static void nes_form_reg_msg(struct nes_vnic *nesvnic,
592 struct iwpm_dev_data *pm_msg)
593{
594 memcpy(pm_msg->dev_name, nesvnic->nesibdev->ibdev.name,
595 IWPM_DEVNAME_SIZE);
596 memcpy(pm_msg->if_name, nesvnic->netdev->name, IWPM_IFNAME_SIZE);
597}
598
599/*
600 * nes_record_pm_msg - Save the received mapping info
601 */
602static void nes_record_pm_msg(struct nes_cm_info *cm_info,
603 struct iwpm_sa_data *pm_msg)
604{
605 struct sockaddr_in *mapped_loc_addr =
606 (struct sockaddr_in *)&pm_msg->mapped_loc_addr;
607 struct sockaddr_in *mapped_rem_addr =
608 (struct sockaddr_in *)&pm_msg->mapped_rem_addr;
609
610 if (mapped_loc_addr->sin_family == AF_INET) {
611 cm_info->mapped_loc_addr =
612 ntohl(mapped_loc_addr->sin_addr.s_addr);
613 cm_info->mapped_loc_port = ntohs(mapped_loc_addr->sin_port);
614 }
615 if (mapped_rem_addr->sin_family == AF_INET) {
616 cm_info->mapped_rem_addr =
617 ntohl(mapped_rem_addr->sin_addr.s_addr);
618 cm_info->mapped_rem_port = ntohs(mapped_rem_addr->sin_port);
619 }
620}
621
3c2d774c
GS		 622/**
623 * print_core - dump a cm core
624 */
625static void print_core(struct nes_cm_core *core)
626{
627 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
628 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
629 if (!core)
630 return;
631 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
3c2d774c 632
615eb715 633 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
3c2d774c 634
3c2d774c
GS		 635 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
636 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
637
638 nes_debug(NES_DBG_CM, "core : %p \n", core);
639
640 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
641}
642
4ac79a70
TN		 643static void record_ird_ord(struct nes_cm_node *cm_node,
644 u16 conn_ird, u16 conn_ord)
645{
646 if (conn_ird > NES_MAX_IRD)
647 conn_ird = NES_MAX_IRD;
648
649 if (conn_ord > NES_MAX_ORD)
650 conn_ord = NES_MAX_ORD;
651
652 cm_node->ird_size = conn_ird;
653 cm_node->ord_size = conn_ord;
654}
655
615eb715
TN		 656/**
657 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
658 */
659static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
660 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
661{
662 int ret = 0;
663
664 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
665
666 switch (cm_node->mpa_frame_rev) {
667 case IETF_MPA_V1:
668 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
669 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
670 build_mpa_v1(cm_node, *start_buff, mpa_key);
671 break;
672 case IETF_MPA_V2:
673 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
674 build_mpa_v2(cm_node, *start_buff, mpa_key);
675 break;
676 default:
677 ret = -EINVAL;
678 }
679 return ret;
680}
681
682/**
683 * build_mpa_v2 - build a MPA V2 frame
684 */
685static void build_mpa_v2(struct nes_cm_node *cm_node,
686 void *start_addr, u8 mpa_key)
687{
688 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
689 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
8dd87fba
TN		 690 u16 ctrl_ird;
691 u16 ctrl_ord;
615eb715
TN		 692
693 /* initialize the upper 5 bytes of the frame */
694 build_mpa_v1(cm_node, start_addr, mpa_key);
695 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
696 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
697
698 /* initialize RTR msg */
4ac79a70
TN		 699 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
700 ctrl_ird = IETF_NO_IRD_ORD;
701 ctrl_ord = IETF_NO_IRD_ORD;
702 } else {
703 ctrl_ird = cm_node->ird_size & IETF_NO_IRD_ORD;
704 ctrl_ord = cm_node->ord_size & IETF_NO_IRD_ORD;
705 }
8dd87fba
TN		 706 ctrl_ird |= IETF_PEER_TO_PEER;
707 ctrl_ird |= IETF_FLPDU_ZERO_LEN;
615eb715
TN		 708
709 switch (mpa_key) {
710 case MPA_KEY_REQUEST:
8dd87fba
TN		 711 ctrl_ord |= IETF_RDMA0_WRITE;
712 ctrl_ord |= IETF_RDMA0_READ;
615eb715
TN		 713 break;
714 case MPA_KEY_REPLY:
715 switch (cm_node->send_rdma0_op) {
716 case SEND_RDMA_WRITE_ZERO:
8dd87fba 717 ctrl_ord |= IETF_RDMA0_WRITE;
615eb715
TN		 718 break;
719 case SEND_RDMA_READ_ZERO:
8dd87fba 720 ctrl_ord |= IETF_RDMA0_READ;
615eb715
TN		 721 break;
722 }
723 }
8dd87fba
TN		 724 rtr_msg->ctrl_ird = htons(ctrl_ird);
725 rtr_msg->ctrl_ord = htons(ctrl_ord);
615eb715
TN		 726}
727
728/**
729 * build_mpa_v1 - build a MPA V1 frame
730 */
731static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
732{
733 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
734
735 switch (mpa_key) {
736 case MPA_KEY_REQUEST:
737 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
738 break;
739 case MPA_KEY_REPLY:
740 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
741 break;
742 }
743 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
744 mpa_frame->rev = cm_node->mpa_frame_rev;
745 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
746}
747
748static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
749{
750 u64 u64temp;
751 struct nes_qp *nesqp = *nesqp_addr;
752 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
753
43adff39 754 u64temp = (unsigned long)nesqp->nesuqp_addr;
615eb715
TN		 755 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
756 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
757
758 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
759 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
760
761 switch (cm_node->send_rdma0_op) {
762 case SEND_RDMA_WRITE_ZERO:
763 nes_debug(NES_DBG_CM, "Sending first write.\n");
764 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
765 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
766 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
767 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
768 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
769 break;
770
771 case SEND_RDMA_READ_ZERO:
772 default:
079abea6
JL		 773 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
774 WARN(1, "Unsupported RDMA0 len operation=%u\n",
775 cm_node->send_rdma0_op);
615eb715
TN		 776 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
777 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
778 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
779 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
780 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
781 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
782 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
783 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
784 break;
785 }
786
787 if (nesqp->sq_kmapped) {
788 nesqp->sq_kmapped = 0;
789 kunmap(nesqp->page);
790 }
791
792 /*use the reserved spot on the WQ for the extra first WQE*/
793 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
794 NES_QPCONTEXT_ORDIRD_WRPDU |
795 NES_QPCONTEXT_ORDIRD_ALSMM));
796 nesqp->skip_lsmm = 1;
797 nesqp->hwqp.sq_tail = 0;
798}
3c2d774c
GS		 799
800/**
801 * schedule_nes_timer
802 * note - cm_node needs to be protected before calling this. Encase in:
803 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
804 */
805int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715
TN		 806 enum nes_timer_type type, int send_retrans,
807 int close_when_complete)
3c2d774c 808{
615eb715 809 unsigned long flags;
6492cdf3 810 struct nes_cm_core *cm_core = cm_node->cm_core;
3c2d774c
GS		 811 struct nes_timer_entry *new_send;
812 int ret = 0;
3c2d774c
GS		 813
814 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
815 if (!new_send)
9d5ab133 816 return -ENOMEM;
3c2d774c
GS		 817
818 /* new_send->timetosend = currenttime */
819 new_send->retrycount = NES_DEFAULT_RETRYS;
820 new_send->retranscount = NES_DEFAULT_RETRANS;
821 new_send->skb = skb;
822 new_send->timetosend = jiffies;
823 new_send->type = type;
824 new_send->netdev = cm_node->netdev;
825 new_send->send_retrans = send_retrans;
826 new_send->close_when_complete = close_when_complete;
827
828 if (type == NES_TIMER_TYPE_CLOSE) {
615eb715 829 new_send->timetosend += (HZ / 10);
9d5ab133 830 if (cm_node->recv_entry) {
79fc3d74 831 kfree(new_send);
9d5ab133
FL		 832 WARN_ON(1);
833 return -EINVAL;
834 }
835 cm_node->recv_entry = new_send;
3c2d774c
GS		 836 }
837
838 if (type == NES_TIMER_TYPE_SEND) {
b30db1c1 839 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
3c2d774c 840 atomic_inc(&new_send->skb->users);
6492cdf3
FL		 841 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
842 cm_node->send_entry = new_send;
843 add_ref_cm_node(cm_node);
844 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
845 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
3c2d774c
GS		 846
847 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
848 if (ret != NETDEV_TX_OK) {
6492cdf3 849 nes_debug(NES_DBG_CM, "Error sending packet %p "
615eb715 850 "(jiffies = %lu)\n", new_send, jiffies);
3c2d774c 851 new_send->timetosend = jiffies;
5962c2c8 852 ret = NETDEV_TX_OK;
3c2d774c
GS		 853 } else {
854 cm_packets_sent++;
855 if (!send_retrans) {
6492cdf3 856 cleanup_retrans_entry(cm_node);
3c2d774c 857 if (close_when_complete)
6492cdf3 858 rem_ref_cm_node(cm_core, cm_node);
3c2d774c
GS		 859 return ret;
860 }
3c2d774c 861 }
3c2d774c 862 }
3c2d774c 863
00ad255d
TN		 864 if (!timer_pending(&cm_core->tcp_timer))
865 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
3c2d774c
GS		 866
867 return ret;
868}
869
9d5ab133
FL		 870static void nes_retrans_expired(struct nes_cm_node *cm_node)
871{
68237a0f 872 struct iw_cm_id *cm_id = cm_node->cm_id;
dae58728
FL		 873 enum nes_cm_node_state state = cm_node->state;
874 cm_node->state = NES_CM_STATE_CLOSED;
615eb715 875
dae58728 876 switch (state) {
9d5ab133
FL		 877 case NES_CM_STATE_SYN_RCVD:
878 case NES_CM_STATE_CLOSING:
879 rem_ref_cm_node(cm_node->cm_core, cm_node);
880 break;
881 case NES_CM_STATE_LAST_ACK:
882 case NES_CM_STATE_FIN_WAIT1:
68237a0f
FL		 883 if (cm_node->cm_id)
884 cm_id->rem_ref(cm_id);
9d5ab133
FL		 885 send_reset(cm_node, NULL);
886 break;
887 default:
69524e1a
FL		 888 add_ref_cm_node(cm_node);
889 send_reset(cm_node, NULL);
9d5ab133
FL		 890 create_event(cm_node, NES_CM_EVENT_ABORTED);
891 }
892}
893
894static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
895{
896 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
897 struct iw_cm_id *cm_id = cm_node->cm_id;
898 struct nes_qp *nesqp;
899 unsigned long qplockflags;
900
901 if (!recv_entry)
902 return;
903 nesqp = (struct nes_qp *)recv_entry->skb;
904 if (nesqp) {
905 spin_lock_irqsave(&nesqp->lock, qplockflags);
906 if (nesqp->cm_id) {
907 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
615eb715
TN		 908 "refcount = %d: HIT A "
909 "NES_TIMER_TYPE_CLOSE with something "
910 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
911 atomic_read(&nesqp->refcount));
9d5ab133
FL		 912 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
913 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
914 nesqp->ibqp_state = IB_QPS_ERR;
915 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
916 nes_cm_disconn(nesqp);
917 } else {
918 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
919 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
615eb715
TN		 920 "refcount = %d: HIT A "
921 "NES_TIMER_TYPE_CLOSE with nothing "
922 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
923 atomic_read(&nesqp->refcount));
9d5ab133
FL		 924 }
925 } else if (rem_node) {
926 /* TIME_WAIT state */
927 rem_ref_cm_node(cm_node->cm_core, cm_node);
928 }
929 if (cm_node->cm_id)
930 cm_id->rem_ref(cm_id);
931 kfree(recv_entry);
932 cm_node->recv_entry = NULL;
933}
3c2d774c
GS		 934
935/**
936 * nes_cm_timer_tick
937 */
1a855fbf 938static void nes_cm_timer_tick(unsigned long pass)
3c2d774c 939{
9d5ab133 940 unsigned long flags;
3c2d774c 941 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
3c2d774c
GS		 942 struct nes_cm_node *cm_node;
943 struct nes_timer_entry *send_entry, *recv_entry;
9d5ab133
FL		 944 struct list_head *list_core_temp;
945 struct list_head *list_node;
3c2d774c 946 struct nes_cm_core *cm_core = g_cm_core;
3c2d774c 947 u32 settimer = 0;
4e9c3900 948 unsigned long timetosend;
3c2d774c 949 int ret = NETDEV_TX_OK;
3c2d774c 950
879e5bd5 951 struct list_head timer_list;
615eb715 952
879e5bd5 953 INIT_LIST_HEAD(&timer_list);
3c2d774c
GS		 954 spin_lock_irqsave(&cm_core->ht_lock, flags);
955
6492cdf3 956 list_for_each_safe(list_node, list_core_temp,
615eb715 957 &cm_core->connected_nodes) {
3c2d774c 958 cm_node = container_of(list_node, struct nes_cm_node, list);
9d5ab133 959 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
879e5bd5
FL		 960 add_ref_cm_node(cm_node);
961 list_add(&cm_node->timer_entry, &timer_list);
962 }
963 }
964 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
965
966 list_for_each_safe(list_node, list_core_temp, &timer_list) {
967 cm_node = container_of(list_node, struct nes_cm_node,
615eb715 968 timer_entry);
9d5ab133
FL		 969 recv_entry = cm_node->recv_entry;
970
971 if (recv_entry) {
6492cdf3
FL		 972 if (time_after(recv_entry->timetosend, jiffies)) {
973 if (nexttimeout > recv_entry->timetosend ||
615eb715 974 !settimer) {
3c2d774c
GS		 975 nexttimeout = recv_entry->timetosend;
976 settimer = 1;
977 }
615eb715 978 } else {
9d5ab133 979 handle_recv_entry(cm_node, 1);
615eb715 980 }
3c2d774c 981 }
3c2d774c
GS		 982
983 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
6492cdf3
FL		 984 do {
985 send_entry = cm_node->send_entry;
986 if (!send_entry)
c5d321e5 987 break;
3c2d774c
GS		 988 if (time_after(send_entry->timetosend, jiffies)) {
989 if (cm_node->state != NES_CM_STATE_TSA) {
6492cdf3 990 if ((nexttimeout >
615eb715
TN		 991 send_entry->timetosend) ||
992 !settimer) {
6492cdf3
FL		 993 nexttimeout =
994 send_entry->timetosend;
3c2d774c
GS		 995 settimer = 1;
996 }
3c2d774c 997 } else {
6492cdf3 998 free_retrans_entry(cm_node);
3c2d774c 999 }
9d5ab133 1000 break;
3c2d774c 1001 }
6492cdf3
FL		 1002
1003 if ((cm_node->state == NES_CM_STATE_TSA) ||
615eb715 1004 (cm_node->state == NES_CM_STATE_CLOSED)) {
6492cdf3 1005 free_retrans_entry(cm_node);
c5d321e5 1006 break;
3c2d774c
GS		 1007 }
1008
6492cdf3 1009 if (!send_entry->retranscount ||
615eb715 1010 !send_entry->retrycount) {
3c2d774c 1011 cm_packets_dropped++;
6492cdf3 1012 free_retrans_entry(cm_node);
9d5ab133 1013
6492cdf3
FL		 1014 spin_unlock_irqrestore(
1015 &cm_node->retrans_list_lock, flags);
9d5ab133
FL		 1016 nes_retrans_expired(cm_node);
1017 cm_node->state = NES_CM_STATE_CLOSED;
6492cdf3 1018 spin_lock_irqsave(&cm_node->retrans_list_lock,
615eb715 1019 flags);
c5d321e5 1020 break;
3c2d774c 1021 }
3c2d774c
GS		 1022 atomic_inc(&send_entry->skb->users);
1023 cm_packets_retrans++;
6492cdf3 1024 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
615eb715
TN		 1025 "for node %p, jiffies = %lu, time to send = "
1026 "%lu, retranscount = %u, send_entry->seq_num = "
1027 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
1028 "0x%08X\n", send_entry, cm_node, jiffies,
1029 send_entry->timetosend,
1030 send_entry->retranscount,
1031 send_entry->seq_num,
1032 cm_node->tcp_cntxt.rem_ack_num);
6492cdf3
FL		 1033
1034 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
615eb715 1035 flags);
3c2d774c 1036 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
6492cdf3 1037 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
3c2d774c 1038 if (ret != NETDEV_TX_OK) {
6492cdf3 1039 nes_debug(NES_DBG_CM, "rexmit failed for "
615eb715 1040 "node=%p\n", cm_node);
3c2d774c 1041 cm_packets_bounced++;
3c2d774c
GS		 1042 send_entry->retrycount--;
1043 nexttimeout = jiffies + NES_SHORT_TIME;
1044 settimer = 1;
c5d321e5 1045 break;
3c2d774c
GS		 1046 } else {
1047 cm_packets_sent++;
1048 }
6492cdf3 1049 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
615eb715
TN		 1050 "%u, retry count = %u.\n",
1051 send_entry->retranscount,
1052 send_entry->retrycount);
3c2d774c
GS		 1053 if (send_entry->send_retrans) {
1054 send_entry->retranscount--;
4e9c3900 1055 timetosend = (NES_RETRY_TIMEOUT <<
615eb715 1056 (NES_DEFAULT_RETRANS - send_entry->retranscount));
4e9c3900 1057
6492cdf3 1058 send_entry->timetosend = jiffies +
615eb715 1059 min(timetosend, NES_MAX_TIMEOUT);
6492cdf3 1060 if (nexttimeout > send_entry->timetosend ||
615eb715 1061 !settimer) {
3c2d774c
GS		 1062 nexttimeout = send_entry->timetosend;
1063 settimer = 1;
1064 }
3c2d774c
GS		 1065 } else {
1066 int close_when_complete;
6492cdf3
FL		 1067 close_when_complete =
1068 send_entry->close_when_complete;
1069 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
615eb715 1070 cm_node, cm_node->state);
6492cdf3
FL		 1071 free_retrans_entry(cm_node);
1072 if (close_when_complete)
1073 rem_ref_cm_node(cm_node->cm_core,
615eb715 1074 cm_node);
3c2d774c 1075 }
6492cdf3 1076 } while (0);
3c2d774c 1077
6492cdf3
FL		 1078 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1079 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 1080 }
3c2d774c
GS		 1081
1082 if (settimer) {
00ad255d
TN		 1083 if (!timer_pending(&cm_core->tcp_timer))
1084 mod_timer(&cm_core->tcp_timer, nexttimeout);
3c2d774c
GS		 1085 }
1086}
1087
1088
1089/**
1090 * send_syn
1091 */
6492cdf3 1092static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
615eb715 1093 struct sk_buff *skb)
3c2d774c
GS		 1094{
1095 int ret;
1096 int flags = SET_SYN;
3c2d774c 1097 char optionsbuffer[sizeof(struct option_mss) +
615eb715
TN		 1098 sizeof(struct option_windowscale) + sizeof(struct option_base) +
1099 TCP_OPTIONS_PADDING];
3c2d774c
GS		 1100
1101 int optionssize = 0;
1102 /* Sending MSS option */
1103 union all_known_options *options;
1104
1105 if (!cm_node)
1106 return -EINVAL;
1107
1108 options = (union all_known_options *)&optionsbuffer[optionssize];
1109 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1110 options->as_mss.length = sizeof(struct option_mss);
1111 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1112 optionssize += sizeof(struct option_mss);
1113
1114 options = (union all_known_options *)&optionsbuffer[optionssize];
1115 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1116 options->as_windowscale.length = sizeof(struct option_windowscale);
1117 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1118 optionssize += sizeof(struct option_windowscale);
1119
6492cdf3 1120 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
3c2d774c
GS		 1121 options = (union all_known_options *)&optionsbuffer[optionssize];
1122 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
1123 options->as_base.length = sizeof(struct option_base);
1124 optionssize += sizeof(struct option_base);
1125 /* we need the size to be a multiple of 4 */
1126 options = (union all_known_options *)&optionsbuffer[optionssize];
1127 options->as_end = 1;
1128 optionssize += 1;
1129 options = (union all_known_options *)&optionsbuffer[optionssize];
1130 options->as_end = 1;
1131 optionssize += 1;
1132 }
1133
1134 options = (union all_known_options *)&optionsbuffer[optionssize];
1135 options->as_end = OPTION_NUMBER_END;
1136 optionssize += 1;
1137
6492cdf3 1138 if (!skb)
e189062a 1139 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1140 if (!skb) {
1141 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1142 return -1;
1143 }
1144
1145 if (sendack)
1146 flags |= SET_ACK;
1147
1148 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1149 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1150
1151 return ret;
1152}
1153
1154
1155/**
1156 * send_reset
1157 */
6492cdf3 1158static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 1159{
1160 int ret;
3c2d774c
GS		 1161 int flags = SET_RST | SET_ACK;
1162
6492cdf3 1163 if (!skb)
e189062a 1164 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1165 if (!skb) {
1166 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
9d5ab133 1167 return -ENOMEM;
3c2d774c
GS		 1168 }
1169
3c2d774c
GS		 1170 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1171 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1172
1173 return ret;
1174}
1175
1176
1177/**
1178 * send_ack
1179 */
6492cdf3 1180static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 1181{
1182 int ret;
6492cdf3
FL		 1183
1184 if (!skb)
e189062a 1185 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1186
1187 if (!skb) {
1188 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1189 return -1;
1190 }
1191
1192 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1193 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1194
1195 return ret;
1196}
1197
1198
1199/**
1200 * send_fin
1201 */
1a855fbf 1202static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
3c2d774c
GS		 1203{
1204 int ret;
1205
1206 /* if we didn't get a frame get one */
1207 if (!skb)
e189062a 1208 skb = dev_alloc_skb(MAX_CM_BUFFER);
3c2d774c
GS		 1209
1210 if (!skb) {
1211 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1212 return -1;
1213 }
1214
1215 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1216 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1217
1218 return ret;
1219}
1220
1221
3c2d774c
GS		 1222/**
1223 * find_node - find a cm node that matches the reference cm node
1224 */
1225static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
615eb715 1226 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
3c2d774c
GS		 1227{
1228 unsigned long flags;
3c2d774c
GS		 1229 struct list_head *hte;
1230 struct nes_cm_node *cm_node;
1231
3c2d774c
GS		 1232 /* get a handle on the hte */
1233 hte = &cm_core->connected_nodes;
1234
3c2d774c
GS		 1235 /* walk list and find cm_node associated with this session ID */
1236 spin_lock_irqsave(&cm_core->ht_lock, flags);
4e96a774 1237 list_for_each_entry(cm_node, hte, list) {
3c2d774c
GS		 1238 /* compare quad, return node handle if a match */
1239 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
615eb715
TN		 1240 cm_node->loc_addr, cm_node->loc_port,
1241 loc_addr, loc_port,
1242 cm_node->rem_addr, cm_node->rem_port,
1243 rem_addr, rem_port);
5647263c
TN		 1244 if ((cm_node->mapped_loc_addr == loc_addr) &&
1245 (cm_node->mapped_loc_port == loc_port) &&
1246 (cm_node->mapped_rem_addr == rem_addr) &&
1247 (cm_node->mapped_rem_port == rem_port)) {
1248
3c2d774c
GS		 1249 add_ref_cm_node(cm_node);
1250 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1251 return cm_node;
1252 }
1253 }
1254 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1255
1256 /* no owner node */
1257 return NULL;
1258}
1259
1260
1261/**
1262 * find_listener - find a cm node listening on this addr-port pair
1263 */
1264static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
5647263c
TN		 1265 nes_addr_t dst_addr, u16 dst_port,
1266 enum nes_cm_listener_state listener_state, int local)
3c2d774c
GS		 1267{
1268 unsigned long flags;
3c2d774c 1269 struct nes_cm_listener *listen_node;
5647263c
TN		 1270 nes_addr_t listen_addr;
1271 u16 listen_port;
3c2d774c
GS		 1272
1273 /* walk list and find cm_node associated with this session ID */
1274 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4e96a774 1275 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
5647263c
TN		 1276 if (local) {
1277 listen_addr = listen_node->loc_addr;
1278 listen_port = listen_node->loc_port;
1279 } else {
1280 listen_addr = listen_node->mapped_loc_addr;
1281 listen_port = listen_node->mapped_loc_port;
1282 }
3c2d774c 1283 /* compare node pair, return node handle if a match */
5647263c
TN		 1284 if (((listen_addr == dst_addr) ||
1285 listen_addr == 0x00000000) &&
1286 (listen_port == dst_port) &&
615eb715 1287 (listener_state & listen_node->listener_state)) {
3c2d774c
GS		 1288 atomic_inc(&listen_node->ref_count);
1289 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1290 return listen_node;
1291 }
1292 }
1293 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1294
3c2d774c
GS		 1295 /* no listener */
1296 return NULL;
1297}
1298
3c2d774c
GS		 1299/**
1300 * add_hte_node - add a cm node to the hash table
1301 */
1302static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1303{
1304 unsigned long flags;
3c2d774c
GS		 1305 struct list_head *hte;
1306
1307 if (!cm_node || !cm_core)
1308 return -EINVAL;
1309
6492cdf3 1310 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
615eb715 1311 cm_node);
3c2d774c 1312
3c2d774c
GS		 1313 spin_lock_irqsave(&cm_core->ht_lock, flags);
1314
1315 /* get a handle on the hash table element (list head for this slot) */
1316 hte = &cm_core->connected_nodes;
1317 list_add_tail(&cm_node->list, hte);
1318 atomic_inc(&cm_core->ht_node_cnt);
1319
1320 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1321
1322 return 0;
1323}
1324
1325
1326/**
1327 * mini_cm_dec_refcnt_listen
1328 */
1329static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
615eb715 1330 struct nes_cm_listener *listener, int free_hanging_nodes)
3c2d774c 1331{
9d5ab133
FL		 1332 int ret = -EINVAL;
1333 int err = 0;
3c2d774c 1334 unsigned long flags;
6492cdf3
FL		 1335 struct list_head *list_pos = NULL;
1336 struct list_head *list_temp = NULL;
1337 struct nes_cm_node *cm_node = NULL;
879e5bd5 1338 struct list_head reset_list;
6492cdf3
FL		 1339
1340 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
615eb715
TN		 1341 "refcnt=%d\n", listener, free_hanging_nodes,
1342 atomic_read(&listener->ref_count));
6492cdf3 1343 /* free non-accelerated child nodes for this listener */
879e5bd5 1344 INIT_LIST_HEAD(&reset_list);
6492cdf3
FL		 1345 if (free_hanging_nodes) {
1346 spin_lock_irqsave(&cm_core->ht_lock, flags);
1347 list_for_each_safe(list_pos, list_temp,
879e5bd5 1348 &g_cm_core->connected_nodes) {
6492cdf3 1349 cm_node = container_of(list_pos, struct nes_cm_node,
615eb715 1350 list);
6492cdf3 1351 if ((cm_node->listener == listener) &&
879e5bd5
FL		 1352 (!cm_node->accelerated)) {
1353 add_ref_cm_node(cm_node);
1354 list_add(&cm_node->reset_entry, &reset_list);
6492cdf3
FL		 1355 }
1356 }
1357 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1358 }
879e5bd5
FL		 1359
1360 list_for_each_safe(list_pos, list_temp, &reset_list) {
1361 cm_node = container_of(list_pos, struct nes_cm_node,
615eb715 1362 reset_entry);
9d5ab133
FL		 1363 {
1364 struct nes_cm_node *loopback = cm_node->loopbackpartner;
c5a7d489 1365 enum nes_cm_node_state old_state;
9d5ab133
FL		 1366 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1367 rem_ref_cm_node(cm_node->cm_core, cm_node);
1368 } else {
1369 if (!loopback) {
1370 cleanup_retrans_entry(cm_node);
1371 err = send_reset(cm_node, NULL);
1372 if (err) {
1373 cm_node->state =
615eb715 1374 NES_CM_STATE_CLOSED;
9d5ab133
FL		 1375 WARN_ON(1);
1376 } else {
c5a7d489
FL		 1377 old_state = cm_node->state;
1378 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1379 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1380 rem_ref_cm_node(
1381 cm_node->cm_core,
1382 cm_node);
9d5ab133
FL		 1383 }
1384 } else {
1385 struct nes_cm_event event;
1386
1387 event.cm_node = loopback;
1388 event.cm_info.rem_addr =
1389 loopback->rem_addr;
1390 event.cm_info.loc_addr =
1391 loopback->loc_addr;
1392 event.cm_info.rem_port =
1393 loopback->rem_port;
1394 event.cm_info.loc_port =
1395 loopback->loc_port;
1396 event.cm_info.cm_id = loopback->cm_id;
43093b94
FL		 1397 add_ref_cm_node(loopback);
1398 loopback->state = NES_CM_STATE_CLOSED;
9d5ab133 1399 cm_event_connect_error(&event);
c5a7d489 1400 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
9d5ab133 1401
9d5ab133
FL		 1402 rem_ref_cm_node(cm_node->cm_core,
1403 cm_node);
1404
1405 }
1406 }
1407 }
879e5bd5
FL		 1408 }
1409
3c2d774c
GS		 1410 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1411 if (!atomic_dec_return(&listener->ref_count)) {
1412 list_del(&listener->list);
1413
1414 /* decrement our listen node count */
1415 atomic_dec(&cm_core->listen_node_cnt);
1416
1417 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1418
5647263c
TN		 1419 if (listener->nesvnic) {
1420 nes_manage_apbvt(listener->nesvnic,
1421 listener->mapped_loc_port,
1422 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn),
1423 NES_MANAGE_APBVT_DEL);
1424
1425 nes_remove_mapinfo(listener->loc_addr,
1426 listener->loc_port,
1427 listener->mapped_loc_addr,
1428 listener->mapped_loc_port);
1429 nes_debug(NES_DBG_NLMSG,
1430 "Delete APBVT mapped_loc_port = %04X\n",
1431 listener->mapped_loc_port);
1432 }
3c2d774c
GS		 1433
1434 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1435
1436 kfree(listener);
a2e9c384 1437 listener = NULL;
3c2d774c 1438 ret = 0;
6e10d2e4 1439 atomic_inc(&cm_listens_destroyed);
3c2d774c
GS		 1440 } else {
1441 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1442 }
1443 if (listener) {
1444 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1445 nes_debug(NES_DBG_CM, "destroying listener (%p)"
615eb715
TN		 1446 " with non-zero pending accepts=%u\n",
1447 listener, atomic_read(&listener->pend_accepts_cnt));
3c2d774c
GS		 1448 }
1449
1450 return ret;
1451}
1452
1453
1454/**
1455 * mini_cm_del_listen
1456 */
1457static int mini_cm_del_listen(struct nes_cm_core *cm_core,
615eb715 1458 struct nes_cm_listener *listener)
3c2d774c
GS		 1459{
1460 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1461 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1462 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1463}
1464
1465
1466/**
1467 * mini_cm_accelerated
1468 */
1469static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
615eb715 1470 struct nes_cm_node *cm_node)
3c2d774c 1471{
3c2d774c
GS		 1472 cm_node->accelerated = 1;
1473
1474 if (cm_node->accept_pend) {
1475 BUG_ON(!cm_node->listener);
1476 atomic_dec(&cm_node->listener->pend_accepts_cnt);
9d5ab133 1477 cm_node->accept_pend = 0;
3c2d774c
GS		 1478 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1479 }
1480
00ad255d
TN		 1481 if (!timer_pending(&cm_core->tcp_timer))
1482 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
3c2d774c
GS		 1483
1484 return 0;
1485}
1486
1487
1488/**
7191a0a1 1489 * nes_addr_resolve_neigh
3c2d774c 1490 */
7a576dfd 1491static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
3c2d774c
GS		 1492{
1493 struct rtable *rt;
7191a0a1 1494 struct neighbour *neigh;
7a576dfd 1495 int rc = arpindex;
2a4c97ea 1496 struct net_device *netdev;
7a576dfd 1497 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
3c2d774c 1498
78fbfd8a 1499 rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
b23dd4fe 1500 if (IS_ERR(rt)) {
9d5ab133 1501 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
615eb715 1502 __func__, dst_ip);
7191a0a1 1503 return rc;
3c2d774c
GS		 1504 }
1505
cf55bb24 1506 if (netif_is_bond_slave(nesvnic->netdev))
7f6e7101 1507 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
2a4c97ea
MS		 1508 else
1509 netdev = nesvnic->netdev;
1510
ef3d0c4a 1511 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, netdev);
e55684fa 1512
40e2bb58 1513 rcu_read_lock();
7191a0a1
BS		 1514 if (neigh) {
1515 if (neigh->nud_state & NUD_VALID) {
1516 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
e174961c
JB		 1517 " is %pM, Gateway is 0x%08X \n", dst_ip,
1518 neigh->ha, ntohl(rt->rt_gateway));
7a576dfd
FL		 1519
1520 if (arpindex >= 0) {
79adc532 1521 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
7a576dfd 1522 /* Mac address same as in nes_arp_table */
e55684fa 1523 goto out;
7a576dfd
FL		 1524 }
1525
1526 nes_manage_arp_cache(nesvnic->netdev,
615eb715
TN		 1527 nesadapter->arp_table[arpindex].mac_addr,
1528 dst_ip, NES_ARP_DELETE);
7a576dfd
FL		 1529 }
1530
7191a0a1
BS		 1531 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1532 dst_ip, NES_ARP_ADD);
1533 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1534 NES_ARP_RESOLVE);
40e2bb58
DM		 1535 } else {
1536 neigh_event_send(neigh, NULL);
7191a0a1 1537 }
580da35a 1538 }
e55684fa 1539out:
40e2bb58 1540 rcu_read_unlock();
e55684fa
DM		 1541
1542 if (neigh)
1543 neigh_release(neigh);
1544
3c2d774c 1545 ip_rt_put(rt);
7191a0a1 1546 return rc;
3c2d774c
GS		 1547}
1548
3c2d774c
GS		 1549/**
1550 * make_cm_node - create a new instance of a cm node
1551 */
1552static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
615eb715
TN		 1553 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1554 struct nes_cm_listener *listener)
3c2d774c
GS		 1555{
1556 struct nes_cm_node *cm_node;
1557 struct timespec ts;
7a576dfd 1558 int oldarpindex = 0;
3c2d774c
GS		 1559 int arpindex = 0;
1560 struct nes_device *nesdev;
1561 struct nes_adapter *nesadapter;
1562
1563 /* create an hte and cm_node for this instance */
1564 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1565 if (!cm_node)
1566 return NULL;
1567
1568 /* set our node specific transport info */
1569 cm_node->loc_addr = cm_info->loc_addr;
1570 cm_node->rem_addr = cm_info->rem_addr;
1571 cm_node->loc_port = cm_info->loc_port;
1572 cm_node->rem_port = cm_info->rem_port;
615eb715 1573
5647263c
TN		 1574 cm_node->mapped_loc_addr = cm_info->mapped_loc_addr;
1575 cm_node->mapped_rem_addr = cm_info->mapped_rem_addr;
1576 cm_node->mapped_loc_port = cm_info->mapped_loc_port;
1577 cm_node->mapped_rem_port = cm_info->mapped_rem_port;
1578
615eb715
TN		 1579 cm_node->mpa_frame_rev = mpa_version;
1580 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
4ac79a70
TN		 1581 cm_node->mpav2_ird_ord = 0;
1582 cm_node->ird_size = 0;
1583 cm_node->ord_size = 0;
615eb715 1584
63779436
HH		 1585 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1586 &cm_node->loc_addr, cm_node->loc_port,
1587 &cm_node->rem_addr, cm_node->rem_port);
3c2d774c
GS		 1588 cm_node->listener = listener;
1589 cm_node->netdev = nesvnic->netdev;
1590 cm_node->cm_id = cm_info->cm_id;
1591 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1592
6492cdf3 1593 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
615eb715 1594 cm_node->cm_id);
3c2d774c 1595
3c2d774c 1596 spin_lock_init(&cm_node->retrans_list_lock);
3c2d774c
GS		 1597
1598 cm_node->loopbackpartner = NULL;
1599 atomic_set(&cm_node->ref_count, 1);
1600 /* associate our parent CM core */
1601 cm_node->cm_core = cm_core;
1602 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1603 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1604 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
615eb715 1605 NES_CM_DEFAULT_RCV_WND_SCALE;
3c2d774c
GS		 1606 ts = current_kernel_time();
1607 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1608 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
615eb715 1609 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
3c2d774c
GS		 1610 cm_node->tcp_cntxt.rcv_nxt = 0;
1611 /* get a unique session ID , add thread_id to an upcounter to handle race */
1612 atomic_inc(&cm_core->node_cnt);
3c2d774c
GS		 1613 cm_node->conn_type = cm_info->conn_type;
1614 cm_node->apbvt_set = 0;
1615 cm_node->accept_pend = 0;
1616
1617 cm_node->nesvnic = nesvnic;
1618 /* get some device handles, for arp lookup */
1619 nesdev = nesvnic->nesdev;
1620 nesadapter = nesdev->nesadapter;
1621
1622 cm_node->loopbackpartner = NULL;
7a576dfd 1623
3c2d774c 1624 /* get the mac addr for the remote node */
5647263c
TN		 1625 oldarpindex = nes_arp_table(nesdev, cm_node->mapped_rem_addr,
1626 NULL, NES_ARP_RESOLVE);
1627 arpindex = nes_addr_resolve_neigh(nesvnic,
1628 cm_node->mapped_rem_addr, oldarpindex);
3c2d774c 1629 if (arpindex < 0) {
7a576dfd
FL		 1630 kfree(cm_node);
1631 return NULL;
3c2d774c
GS		 1632 }
1633
1634 /* copy the mac addr to node context */
1635 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
e174961c
JB		 1636 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1637 cm_node->rem_mac);
3c2d774c
GS		 1638
1639 add_hte_node(cm_core, cm_node);
1640 atomic_inc(&cm_nodes_created);
1641
1642 return cm_node;
1643}
1644
1645
1646/**
1647 * add_ref_cm_node - destroy an instance of a cm node
1648 */
1649static int add_ref_cm_node(struct nes_cm_node *cm_node)
1650{
1651 atomic_inc(&cm_node->ref_count);
1652 return 0;
1653}
1654
1655
1656/**
1657 * rem_ref_cm_node - destroy an instance of a cm node
1658 */
1659static int rem_ref_cm_node(struct nes_cm_core *cm_core,
615eb715 1660 struct nes_cm_node *cm_node)
3c2d774c 1661{
9d5ab133 1662 unsigned long flags;
3c2d774c
GS		 1663 struct nes_qp *nesqp;
1664
1665 if (!cm_node)
1666 return -EINVAL;
1667
1668 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1669 if (atomic_dec_return(&cm_node->ref_count)) {
1670 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1671 return 0;
1672 }
1673 list_del(&cm_node->list);
1674 atomic_dec(&cm_core->ht_node_cnt);
1675 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1676
1677 /* if the node is destroyed before connection was accelerated */
1678 if (!cm_node->accelerated && cm_node->accept_pend) {
1679 BUG_ON(!cm_node->listener);
1680 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1681 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1682 }
9d5ab133
FL		 1683 WARN_ON(cm_node->send_entry);
1684 if (cm_node->recv_entry)
1685 handle_recv_entry(cm_node, 0);
3c2d774c
GS		 1686 if (cm_node->listener) {
1687 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1688 } else {
1689 if (cm_node->apbvt_set && cm_node->nesvnic) {
5647263c
TN		 1690 nes_manage_apbvt(cm_node->nesvnic, cm_node->mapped_loc_port,
1691 PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
615eb715 1692 NES_MANAGE_APBVT_DEL);
3c2d774c 1693 }
5647263c
TN		 1694 nes_debug(NES_DBG_NLMSG, "Delete APBVT mapped_loc_port = %04X\n",
1695 cm_node->mapped_loc_port);
1696 nes_remove_mapinfo(cm_node->loc_addr, cm_node->loc_port,
1697 cm_node->mapped_loc_addr, cm_node->mapped_loc_port);
3c2d774c
GS		 1698 }
1699
3c2d774c
GS		 1700 atomic_dec(&cm_core->node_cnt);
1701 atomic_inc(&cm_nodes_destroyed);
6492cdf3
FL		 1702 nesqp = cm_node->nesqp;
1703 if (nesqp) {
1704 nesqp->cm_node = NULL;
1705 nes_rem_ref(&nesqp->ibqp);
1706 cm_node->nesqp = NULL;
1707 }
3c2d774c 1708
6492cdf3 1709 kfree(cm_node);
3c2d774c
GS		 1710 return 0;
1711}
1712
3c2d774c
GS		 1713/**
1714 * process_options
1715 */
6492cdf3 1716static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
615eb715 1717 u32 optionsize, u32 syn_packet)
3c2d774c
GS		 1718{
1719 u32 tmp;
1720 u32 offset = 0;
1721 union all_known_options *all_options;
1722 char got_mss_option = 0;
1723
1724 while (offset < optionsize) {
1725 all_options = (union all_known_options *)(optionsloc + offset);
1726 switch (all_options->as_base.optionnum) {
6492cdf3
FL		 1727 case OPTION_NUMBER_END:
1728 offset = optionsize;
1729 break;
1730 case OPTION_NUMBER_NONE:
1731 offset += 1;
1732 continue;
1733 case OPTION_NUMBER_MSS:
1734 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
615eb715
TN		 1735 "Size: %d\n", __func__,
1736 all_options->as_mss.length, offset, optionsize);
6492cdf3
FL		 1737 got_mss_option = 1;
1738 if (all_options->as_mss.length != 4) {
1739 return 1;
1740 } else {
1741 tmp = ntohs(all_options->as_mss.mss);
1742 if (tmp > 0 && tmp <
615eb715 1743 cm_node->tcp_cntxt.mss)
6492cdf3
FL		 1744 cm_node->tcp_cntxt.mss = tmp;
1745 }
1746 break;
1747 case OPTION_NUMBER_WINDOW_SCALE:
1748 cm_node->tcp_cntxt.snd_wscale =
1749 all_options->as_windowscale.shiftcount;
1750 break;
6492cdf3
FL		 1751 default:
1752 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
615eb715 1753 all_options->as_base.optionnum);
6492cdf3 1754 break;
3c2d774c
GS		 1755 }
1756 offset += all_options->as_base.length;
1757 }
1758 if ((!got_mss_option) && (syn_packet))
1759 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1760 return 0;
1761}
1762
6492cdf3
FL		 1763static void drop_packet(struct sk_buff *skb)
1764{
1765 atomic_inc(&cm_accel_dropped_pkts);
1766 dev_kfree_skb_any(skb);
1767}
3c2d774c 1768
9d5ab133 1769static void handle_fin_pkt(struct nes_cm_node *cm_node)
3c2d774c 1770{
6492cdf3 1771 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
615eb715
TN		 1772 "refcnt=%d\n", cm_node, cm_node->state,
1773 atomic_read(&cm_node->ref_count));
6492cdf3
FL		 1774 switch (cm_node->state) {
1775 case NES_CM_STATE_SYN_RCVD:
1776 case NES_CM_STATE_SYN_SENT:
1777 case NES_CM_STATE_ESTABLISHED:
9d5ab133 1778 case NES_CM_STATE_MPAREJ_RCVD:
109d67e4
FL		 1779 cm_node->tcp_cntxt.rcv_nxt++;
1780 cleanup_retrans_entry(cm_node);
6492cdf3 1781 cm_node->state = NES_CM_STATE_LAST_ACK;
9d5ab133 1782 send_fin(cm_node, NULL);
6492cdf3 1783 break;
b1190d3e
FL		 1784 case NES_CM_STATE_MPAREQ_SENT:
1785 create_event(cm_node, NES_CM_EVENT_ABORTED);
1786 cm_node->tcp_cntxt.rcv_nxt++;
1787 cleanup_retrans_entry(cm_node);
1788 cm_node->state = NES_CM_STATE_CLOSED;
1789 add_ref_cm_node(cm_node);
1790 send_reset(cm_node, NULL);
1791 break;
6492cdf3 1792 case NES_CM_STATE_FIN_WAIT1:
109d67e4
FL		 1793 cm_node->tcp_cntxt.rcv_nxt++;
1794 cleanup_retrans_entry(cm_node);
6492cdf3 1795 cm_node->state = NES_CM_STATE_CLOSING;
9d5ab133 1796 send_ack(cm_node, NULL);
25985edc 1797 /* Wait for ACK as this is simultaneous close..
9d5ab133
FL		 1798 * After we receive ACK, do not send anything..
1799 * Just rm the node.. Done.. */
6492cdf3
FL		 1800 break;
1801 case NES_CM_STATE_FIN_WAIT2:
109d67e4
FL		 1802 cm_node->tcp_cntxt.rcv_nxt++;
1803 cleanup_retrans_entry(cm_node);
6492cdf3 1804 cm_node->state = NES_CM_STATE_TIME_WAIT;
9d5ab133
FL		 1805 send_ack(cm_node, NULL);
1806 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1807 break;
1808 case NES_CM_STATE_TIME_WAIT:
109d67e4
FL		 1809 cm_node->tcp_cntxt.rcv_nxt++;
1810 cleanup_retrans_entry(cm_node);
6492cdf3 1811 cm_node->state = NES_CM_STATE_CLOSED;
9d5ab133 1812 rem_ref_cm_node(cm_node->cm_core, cm_node);
6492cdf3
FL		 1813 break;
1814 case NES_CM_STATE_TSA:
1815 default:
1816 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1817 cm_node, cm_node->state);
6492cdf3 1818 break;
3c2d774c 1819 }
6492cdf3 1820}
3c2d774c 1821
3c2d774c 1822
6492cdf3
FL		 1823static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1824 struct tcphdr *tcph)
1825{
3c2d774c 1826
6492cdf3
FL		 1827 int reset = 0; /* whether to send reset in case of err.. */
1828 atomic_inc(&cm_resets_recvd);
1829 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1830 " refcnt=%d\n", cm_node, cm_node->state,
1831 atomic_read(&cm_node->ref_count));
1832 cleanup_retrans_entry(cm_node);
1833 switch (cm_node->state) {
1834 case NES_CM_STATE_SYN_SENT:
1835 case NES_CM_STATE_MPAREQ_SENT:
1836 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1837 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1838 cm_node->listener, cm_node->state);
615eb715
TN		 1839 switch (cm_node->mpa_frame_rev) {
1840 case IETF_MPA_V2:
1841 cm_node->mpa_frame_rev = IETF_MPA_V1;
1842 /* send a syn and goto syn sent state */
1843 cm_node->state = NES_CM_STATE_SYN_SENT;
1844 if (send_syn(cm_node, 0, NULL)) {
1845 active_open_err(cm_node, skb, reset);
1846 }
1847 break;
1848 case IETF_MPA_V1:
1849 default:
1850 active_open_err(cm_node, skb, reset);
1851 break;
1852 }
6492cdf3 1853 break;
183ecfa3 1854 case NES_CM_STATE_MPAREQ_RCVD:
4d8d6389 1855 atomic_inc(&cm_node->passive_state);
183ecfa3
FL		 1856 dev_kfree_skb_any(skb);
1857 break;
6492cdf3
FL		 1858 case NES_CM_STATE_ESTABLISHED:
1859 case NES_CM_STATE_SYN_RCVD:
1860 case NES_CM_STATE_LISTENING:
1861 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1862 passive_open_err(cm_node, skb, reset);
1863 break;
1864 case NES_CM_STATE_TSA:
183ecfa3
FL		 1865 active_open_err(cm_node, skb, reset);
1866 break;
1867 case NES_CM_STATE_CLOSED:
183ecfa3
FL		 1868 drop_packet(skb);
1869 break;
dae58728 1870 case NES_CM_STATE_FIN_WAIT2:
68237a0f 1871 case NES_CM_STATE_FIN_WAIT1:
109d67e4
FL		 1872 case NES_CM_STATE_LAST_ACK:
1873 cm_node->cm_id->rem_ref(cm_node->cm_id);
9d5ab133 1874 case NES_CM_STATE_TIME_WAIT:
9d5ab133
FL		 1875 cm_node->state = NES_CM_STATE_CLOSED;
1876 rem_ref_cm_node(cm_node->cm_core, cm_node);
1877 drop_packet(skb);
1878 break;
6492cdf3 1879 default:
183ecfa3 1880 drop_packet(skb);
6492cdf3
FL		 1881 break;
1882 }
1883}
3c2d774c 1884
9d5ab133
FL		 1885
1886static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
6492cdf3 1887{
615eb715 1888 int ret = 0;
6492cdf3
FL		 1889 int datasize = skb->len;
1890 u8 *dataloc = skb->data;
9d5ab133
FL		 1891
1892 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
615eb715
TN		 1893 u32 res_type;
1894
9d5ab133
FL		 1895 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1896 if (ret) {
6492cdf3 1897 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
9d5ab133 1898 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
6492cdf3 1899 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
615eb715
TN		 1900 "cm_node=%p listener=%p state=%d\n", __func__,
1901 __LINE__, cm_node, cm_node->listener,
1902 cm_node->state);
6492cdf3
FL		 1903 active_open_err(cm_node, skb, 1);
1904 } else {
1905 passive_open_err(cm_node, skb, 1);
3c2d774c 1906 }
9d5ab133
FL		 1907 return;
1908 }
1909
1910 switch (cm_node->state) {
1911 case NES_CM_STATE_ESTABLISHED:
615eb715 1912 if (res_type == NES_MPA_REQUEST_REJECT)
9d5ab133 1913 /*BIG problem as we are receiving the MPA.. So should
615eb715
TN		 1914 * not be REJECT.. This is Passive Open.. We can
1915 * only receive it Reject for Active Open...*/
9d5ab133 1916 WARN_ON(1);
9d5ab133
FL		 1917 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1918 type = NES_CM_EVENT_MPA_REQ;
1919 atomic_set(&cm_node->passive_state,
615eb715 1920 NES_PASSIVE_STATE_INDICATED);
9d5ab133
FL		 1921 break;
1922 case NES_CM_STATE_MPAREQ_SENT:
109d67e4 1923 cleanup_retrans_entry(cm_node);
9d5ab133
FL		 1924 if (res_type == NES_MPA_REQUEST_REJECT) {
1925 type = NES_CM_EVENT_MPA_REJECT;
1926 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1927 } else {
1928 type = NES_CM_EVENT_CONNECTED;
6492cdf3 1929 cm_node->state = NES_CM_STATE_TSA;
9d5ab133 1930 }
6492cdf3 1931
9d5ab133
FL		 1932 break;
1933 default:
1934 WARN_ON(1);
1935 break;
6492cdf3 1936 }
9d5ab133
FL		 1937 dev_kfree_skb_any(skb);
1938 create_event(cm_node, type);
6492cdf3
FL		 1939}
1940
1941static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1942{
1943 switch (cm_node->state) {
1944 case NES_CM_STATE_SYN_SENT:
1945 case NES_CM_STATE_MPAREQ_SENT:
1946 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
615eb715
TN		 1947 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1948 cm_node->listener, cm_node->state);
6492cdf3
FL		 1949 active_open_err(cm_node, skb, 1);
1950 break;
1951 case NES_CM_STATE_ESTABLISHED:
1952 case NES_CM_STATE_SYN_RCVD:
1953 passive_open_err(cm_node, skb, 1);
1954 break;
1955 case NES_CM_STATE_TSA:
1956 default:
1957 drop_packet(skb);
3c2d774c 1958 }
6492cdf3
FL		 1959}
1960
1961static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 1962 struct sk_buff *skb)
6492cdf3
FL		 1963{
1964 int err;
1965
615eb715 1966 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
6492cdf3
FL		 1967 if (err)
1968 active_open_err(cm_node, skb, 1);
1969
1970 return err;
1971}
1972
1973static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 1974 struct sk_buff *skb)
6492cdf3
FL		 1975{
1976 int err = 0;
1977 u32 seq;
1978 u32 ack_seq;
1979 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1980 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1981 u32 rcv_wnd;
615eb715 1982
6492cdf3
FL		 1983 seq = ntohl(tcph->seq);
1984 ack_seq = ntohl(tcph->ack_seq);
1985 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1986 if (ack_seq != loc_seq_num)
1987 err = 1;
615eb715 1988 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
6492cdf3
FL		 1989 err = 1;
1990 if (err) {
1991 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
615eb715
TN		 1992 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1993 cm_node->listener, cm_node->state);
6492cdf3
FL		 1994 indicate_pkt_err(cm_node, skb);
1995 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
615eb715
TN		 1996 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1997 rcv_wnd);
6492cdf3
FL		 1998 }
1999 return err;
2000}
2001
2002/*
2003 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
2004 * is created with a listener or it may comein as rexmitted packet which in
2005 * that case will be just dropped.
2006 */
6492cdf3 2007static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2008 struct tcphdr *tcph)
6492cdf3
FL		 2009{
2010 int ret;
2011 u32 inc_sequence;
2012 int optionsize;
3c2d774c
GS		 2013
2014 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 2015 skb_trim(skb, 0);
6492cdf3 2016 inc_sequence = ntohl(tcph->seq);
3c2d774c 2017
6492cdf3
FL		 2018 switch (cm_node->state) {
2019 case NES_CM_STATE_SYN_SENT:
2020 case NES_CM_STATE_MPAREQ_SENT:
2021 /* Rcvd syn on active open connection*/
2022 active_open_err(cm_node, skb, 1);
2023 break;
2024 case NES_CM_STATE_LISTENING:
2025 /* Passive OPEN */
6492cdf3 2026 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
615eb715 2027 cm_node->listener->backlog) {
6492cdf3 2028 nes_debug(NES_DBG_CM, "drop syn due to backlog "
615eb715 2029 "pressure \n");
6492cdf3
FL		 2030 cm_backlog_drops++;
2031 passive_open_err(cm_node, skb, 0);
2032 break;
2033 }
2034 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
615eb715 2035 1);
6492cdf3
FL		 2036 if (ret) {
2037 passive_open_err(cm_node, skb, 0);
2038 /* drop pkt */
2039 break;
2040 }
2041 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2042 BUG_ON(cm_node->send_entry);
9d5ab133
FL		 2043 cm_node->accept_pend = 1;
2044 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2045
6492cdf3
FL		 2046 cm_node->state = NES_CM_STATE_SYN_RCVD;
2047 send_syn(cm_node, 1, skb);
2048 break;
abb77256
FL		 2049 case NES_CM_STATE_CLOSED:
2050 cleanup_retrans_entry(cm_node);
886f98a3 2051 add_ref_cm_node(cm_node);
abb77256
FL		 2052 send_reset(cm_node, skb);
2053 break;
6492cdf3
FL		 2054 case NES_CM_STATE_TSA:
2055 case NES_CM_STATE_ESTABLISHED:
2056 case NES_CM_STATE_FIN_WAIT1:
2057 case NES_CM_STATE_FIN_WAIT2:
2058 case NES_CM_STATE_MPAREQ_RCVD:
2059 case NES_CM_STATE_LAST_ACK:
2060 case NES_CM_STATE_CLOSING:
2061 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 2062 default:
2063 drop_packet(skb);
2064 break;
2065 }
2066}
2067
2068static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2069 struct tcphdr *tcph)
6492cdf3 2070{
6492cdf3
FL		 2071 int ret;
2072 u32 inc_sequence;
2073 int optionsize;
2074
2075 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 2076 skb_trim(skb, 0);
6492cdf3
FL		 2077 inc_sequence = ntohl(tcph->seq);
2078 switch (cm_node->state) {
2079 case NES_CM_STATE_SYN_SENT:
9d5ab133 2080 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2081 /* active open */
2082 if (check_syn(cm_node, tcph, skb))
2083 return;
2084 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2085 /* setup options */
2086 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
2087 if (ret) {
2088 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
615eb715 2089 cm_node);
6492cdf3
FL		 2090 break;
2091 }
2092 cleanup_retrans_entry(cm_node);
2093 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2094 send_mpa_request(cm_node, skb);
2095 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
2096 break;
2097 case NES_CM_STATE_MPAREQ_RCVD:
2098 /* passive open, so should not be here */
2099 passive_open_err(cm_node, skb, 1);
2100 break;
abb77256 2101 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2102 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2103 cleanup_retrans_entry(cm_node);
2104 cm_node->state = NES_CM_STATE_CLOSED;
2105 send_reset(cm_node, skb);
2106 break;
abb77256
FL		 2107 case NES_CM_STATE_CLOSED:
2108 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2109 cleanup_retrans_entry(cm_node);
886f98a3 2110 add_ref_cm_node(cm_node);
abb77256
FL		 2111 send_reset(cm_node, skb);
2112 break;
6492cdf3
FL		 2113 case NES_CM_STATE_ESTABLISHED:
2114 case NES_CM_STATE_FIN_WAIT1:
2115 case NES_CM_STATE_FIN_WAIT2:
2116 case NES_CM_STATE_LAST_ACK:
2117 case NES_CM_STATE_TSA:
2118 case NES_CM_STATE_CLOSING:
2119 case NES_CM_STATE_UNKNOWN:
6492cdf3
FL		 2120 case NES_CM_STATE_MPAREQ_SENT:
2121 default:
2122 drop_packet(skb);
2123 break;
2124 }
2125}
3c2d774c 2126
109d67e4 2127static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2128 struct tcphdr *tcph)
6492cdf3
FL		 2129{
2130 int datasize = 0;
2131 u32 inc_sequence;
109d67e4 2132 int ret = 0;
abb77256 2133 int optionsize;
615eb715 2134
abb77256 2135 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
abb77256 2136
6492cdf3 2137 if (check_seq(cm_node, tcph, skb))
109d67e4 2138 return -EINVAL;
6492cdf3
FL		 2139
2140 skb_pull(skb, tcph->doff << 2);
3c2d774c 2141 inc_sequence = ntohl(tcph->seq);
6492cdf3 2142 datasize = skb->len;
6492cdf3
FL		 2143 switch (cm_node->state) {
2144 case NES_CM_STATE_SYN_RCVD:
2145 /* Passive OPEN */
109d67e4 2146 cleanup_retrans_entry(cm_node);
abb77256
FL		 2147 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2148 if (ret)
2149 break;
6492cdf3
FL		 2150 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2151 cm_node->state = NES_CM_STATE_ESTABLISHED;
2152 if (datasize) {
2153 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 2154 handle_rcv_mpa(cm_node, skb);
615eb715 2155 } else { /* rcvd ACK only */
6492cdf3 2156 dev_kfree_skb_any(skb);
615eb715 2157 }
6492cdf3
FL		 2158 break;
2159 case NES_CM_STATE_ESTABLISHED:
2160 /* Passive OPEN */
9d5ab133 2161 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2162 if (datasize) {
2163 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 2164 handle_rcv_mpa(cm_node, skb);
615eb715 2165 } else {
6492cdf3 2166 drop_packet(skb);
615eb715 2167 }
6492cdf3
FL		 2168 break;
2169 case NES_CM_STATE_MPAREQ_SENT:
2170 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2171 if (datasize) {
2172 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
9d5ab133 2173 handle_rcv_mpa(cm_node, skb);
615eb715 2174 } else { /* Could be just an ack pkt.. */
6492cdf3 2175 dev_kfree_skb_any(skb);
615eb715 2176 }
6492cdf3 2177 break;
abb77256 2178 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2179 cleanup_retrans_entry(cm_node);
2180 cm_node->state = NES_CM_STATE_CLOSED;
2181 send_reset(cm_node, skb);
2182 break;
abb77256
FL		 2183 case NES_CM_STATE_CLOSED:
2184 cleanup_retrans_entry(cm_node);
886f98a3 2185 add_ref_cm_node(cm_node);
abb77256
FL		 2186 send_reset(cm_node, skb);
2187 break;
9d5ab133 2188 case NES_CM_STATE_LAST_ACK:
109d67e4 2189 case NES_CM_STATE_CLOSING:
9d5ab133
FL		 2190 cleanup_retrans_entry(cm_node);
2191 cm_node->state = NES_CM_STATE_CLOSED;
2192 cm_node->cm_id->rem_ref(cm_node->cm_id);
9d5ab133
FL		 2193 rem_ref_cm_node(cm_node->cm_core, cm_node);
2194 drop_packet(skb);
2195 break;
6492cdf3 2196 case NES_CM_STATE_FIN_WAIT1:
9d5ab133
FL		 2197 cleanup_retrans_entry(cm_node);
2198 drop_packet(skb);
2199 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2200 break;
6492cdf3
FL		 2201 case NES_CM_STATE_SYN_SENT:
2202 case NES_CM_STATE_FIN_WAIT2:
2203 case NES_CM_STATE_TSA:
6492cdf3 2204 case NES_CM_STATE_MPAREQ_RCVD:
6492cdf3
FL		 2205 case NES_CM_STATE_UNKNOWN:
2206 default:
109d67e4 2207 cleanup_retrans_entry(cm_node);
6492cdf3
FL		 2208 drop_packet(skb);
2209 break;
3c2d774c 2210 }
109d67e4 2211 return ret;
6492cdf3 2212}
3c2d774c 2213
3c2d774c
GS		 2214
2215
6492cdf3 2216static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
615eb715 2217 struct sk_buff *skb, int optionsize, int passive)
6492cdf3
FL		 2218{
2219 u8 *optionsloc = (u8 *)&tcph[1];
615eb715 2220
3c2d774c 2221 if (optionsize) {
6492cdf3 2222 if (process_options(cm_node, optionsloc, optionsize,
615eb715 2223 (u32)tcph->syn)) {
6492cdf3 2224 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
615eb715 2225 __func__, cm_node);
6492cdf3 2226 if (passive)
abb77256 2227 passive_open_err(cm_node, skb, 1);
6492cdf3 2228 else
abb77256 2229 active_open_err(cm_node, skb, 1);
6492cdf3 2230 return 1;
3c2d774c 2231 }
6492cdf3 2232 }
3c2d774c
GS		 2233
2234 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
615eb715 2235 cm_node->tcp_cntxt.snd_wscale;
3c2d774c 2236
6492cdf3 2237 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
3c2d774c 2238 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
6492cdf3
FL		 2239 return 0;
2240}
3c2d774c 2241
6492cdf3
FL		 2242/*
2243 * active_open_err() will send reset() if flag set..
2244 * It will also send ABORT event.
2245 */
6492cdf3 2246static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2247 int reset)
6492cdf3
FL		 2248{
2249 cleanup_retrans_entry(cm_node);
2250 if (reset) {
2251 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
615eb715 2252 "state=%d\n", cm_node, cm_node->state);
6492cdf3
FL		 2253 add_ref_cm_node(cm_node);
2254 send_reset(cm_node, skb);
615eb715 2255 } else {
6492cdf3 2256 dev_kfree_skb_any(skb);
615eb715 2257 }
3c2d774c 2258
6492cdf3
FL		 2259 cm_node->state = NES_CM_STATE_CLOSED;
2260 create_event(cm_node, NES_CM_EVENT_ABORTED);
2261}
3c2d774c 2262
6492cdf3
FL		 2263/*
2264 * passive_open_err() will either do a reset() or will free up the skb and
2265 * remove the cm_node.
2266 */
6492cdf3 2267static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2268 int reset)
6492cdf3
FL		 2269{
2270 cleanup_retrans_entry(cm_node);
2271 cm_node->state = NES_CM_STATE_CLOSED;
2272 if (reset) {
2273 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
615eb715 2274 "cm_node=%p state =%d\n", cm_node, cm_node->state);
6492cdf3
FL		 2275 send_reset(cm_node, skb);
2276 } else {
2277 dev_kfree_skb_any(skb);
2278 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 2279 }
6492cdf3 2280}
3c2d774c 2281
6492cdf3
FL		 2282/*
2283 * free_retrans_entry() routines assumes that the retrans_list_lock has
2284 * been acquired before calling.
2285 */
2286static void free_retrans_entry(struct nes_cm_node *cm_node)
2287{
2288 struct nes_timer_entry *send_entry;
615eb715 2289
6492cdf3
FL		 2290 send_entry = cm_node->send_entry;
2291 if (send_entry) {
2292 cm_node->send_entry = NULL;
2293 dev_kfree_skb_any(send_entry->skb);
2294 kfree(send_entry);
2295 rem_ref_cm_node(cm_node->cm_core, cm_node);
3c2d774c 2296 }
6492cdf3 2297}
3c2d774c 2298
6492cdf3
FL		 2299static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2300{
2301 unsigned long flags;
3c2d774c 2302
6492cdf3
FL		 2303 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2304 free_retrans_entry(cm_node);
2305 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
3c2d774c
GS		 2306}
2307
6492cdf3
FL		 2308/**
2309 * process_packet
2310 * Returns skb if to be freed, else it will return NULL if already used..
2311 */
2312static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
615eb715 2313 struct nes_cm_core *cm_core)
6492cdf3 2314{
615eb715 2315 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
6492cdf3 2316 struct tcphdr *tcph = tcp_hdr(skb);
615eb715 2317 u32 fin_set = 0;
109d67e4 2318 int ret = 0;
615eb715 2319
6492cdf3
FL		 2320 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2321
2322 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
615eb715
TN		 2323 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2324 tcph->ack, tcph->rst, tcph->fin);
6492cdf3 2325
615eb715 2326 if (tcph->rst) {
6492cdf3 2327 pkt_type = NES_PKT_TYPE_RST;
615eb715 2328 } else if (tcph->syn) {
6492cdf3
FL		 2329 pkt_type = NES_PKT_TYPE_SYN;
2330 if (tcph->ack)
2331 pkt_type = NES_PKT_TYPE_SYNACK;
615eb715 2332 } else if (tcph->ack) {
6492cdf3 2333 pkt_type = NES_PKT_TYPE_ACK;
615eb715 2334 }
9d5ab133
FL		 2335 if (tcph->fin)
2336 fin_set = 1;
6492cdf3
FL		 2337
2338 switch (pkt_type) {
2339 case NES_PKT_TYPE_SYN:
2340 handle_syn_pkt(cm_node, skb, tcph);
2341 break;
2342 case NES_PKT_TYPE_SYNACK:
2343 handle_synack_pkt(cm_node, skb, tcph);
2344 break;
2345 case NES_PKT_TYPE_ACK:
109d67e4
FL		 2346 ret = handle_ack_pkt(cm_node, skb, tcph);
2347 if (fin_set && !ret)
9d5ab133 2348 handle_fin_pkt(cm_node);
6492cdf3
FL		 2349 break;
2350 case NES_PKT_TYPE_RST:
2351 handle_rst_pkt(cm_node, skb, tcph);
2352 break;
6492cdf3 2353 default:
109d67e4 2354 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
9d5ab133 2355 handle_fin_pkt(cm_node);
109d67e4 2356 drop_packet(skb);
6492cdf3
FL		 2357 break;
2358 }
2359}
3c2d774c
GS		 2360
2361/**
2362 * mini_cm_listen - create a listen node with params
2363 */
2364static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
5647263c 2365 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
3c2d774c
GS		 2366{
2367 struct nes_cm_listener *listener;
5647263c
TN		 2368 struct iwpm_dev_data pm_reg_msg;
2369 struct iwpm_sa_data pm_msg;
3c2d774c 2370 unsigned long flags;
5647263c 2371 int iwpm_err = 0;
3c2d774c
GS		 2372
2373 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
615eb715 2374 cm_info->loc_addr, cm_info->loc_port);
3c2d774c
GS		 2375
2376 /* cannot have multiple matching listeners */
5647263c
TN		 2377 listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2378 NES_CM_LISTENER_EITHER_STATE, 1);
2379
3c2d774c
GS		 2380 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2381 /* find automatically incs ref count ??? */
2382 atomic_dec(&listener->ref_count);
2383 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2384 return NULL;
2385 }
2386
2387 if (!listener) {
5647263c
TN		 2388 nes_form_reg_msg(nesvnic, &pm_reg_msg);
2389 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
2390 if (iwpm_err) {
2391 nes_debug(NES_DBG_NLMSG,
2392 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
2393 }
2394 if (iwpm_valid_pid() && !iwpm_err) {
2395 nes_form_pm_msg(cm_info, &pm_msg);
2396 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_NES);
2397 if (iwpm_err)
2398 nes_debug(NES_DBG_NLMSG,
2399 "Port Mapper query fail (err = %d).\n", iwpm_err);
2400 else
2401 nes_record_pm_msg(cm_info, &pm_msg);
2402 }
2403
3c2d774c
GS		 2404 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2405 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2406 if (!listener) {
2407 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2408 return NULL;
2409 }
2410
5647263c
TN		 2411 listener->loc_addr = cm_info->loc_addr;
2412 listener->loc_port = cm_info->loc_port;
2413 listener->mapped_loc_addr = cm_info->mapped_loc_addr;
2414 listener->mapped_loc_port = cm_info->mapped_loc_port;
3c2d774c
GS		 2415 listener->reused_node = 0;
2416
2417 atomic_set(&listener->ref_count, 1);
2418 }
2419 /* pasive case */
2420 /* find already inc'ed the ref count */
2421 else {
2422 listener->reused_node = 1;
2423 }
2424
2425 listener->cm_id = cm_info->cm_id;
2426 atomic_set(&listener->pend_accepts_cnt, 0);
2427 listener->cm_core = cm_core;
2428 listener->nesvnic = nesvnic;
2429 atomic_inc(&cm_core->node_cnt);
3c2d774c 2430
3c2d774c
GS		 2431 listener->conn_type = cm_info->conn_type;
2432 listener->backlog = cm_info->backlog;
2433 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2434
2435 if (!listener->reused_node) {
2436 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2437 list_add(&listener->list, &cm_core->listen_list.list);
2438 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2439 atomic_inc(&cm_core->listen_node_cnt);
2440 }
2441
2442 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
615eb715
TN		 2443 " listener = %p, backlog = %d, cm_id = %p.\n",
2444 cm_info->loc_addr, cm_info->loc_port,
2445 listener, listener->backlog, listener->cm_id);
3c2d774c
GS		 2446
2447 return listener;
2448}
2449
2450
2451/**
2452 * mini_cm_connect - make a connection node with params
2453 */
54c86a8c 2454static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
615eb715
TN		 2455 struct nes_vnic *nesvnic, u16 private_data_len,
2456 void *private_data, struct nes_cm_info *cm_info)
3c2d774c
GS		 2457{
2458 int ret = 0;
2459 struct nes_cm_node *cm_node;
2460 struct nes_cm_listener *loopbackremotelistener;
2461 struct nes_cm_node *loopbackremotenode;
2462 struct nes_cm_info loopback_cm_info;
615eb715 2463 u8 *start_buff;
3c2d774c
GS		 2464
2465 /* create a CM connection node */
2466 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2467 if (!cm_node)
2468 return NULL;
2469
7495ab68 2470 /* set our node side to client (active) side */
3c2d774c
GS		 2471 cm_node->tcp_cntxt.client = 1;
2472 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2473
2474 if (cm_info->loc_addr == cm_info->rem_addr) {
6492cdf3 2475 loopbackremotelistener = find_listener(cm_core,
5647263c
TN		 2476 cm_node->mapped_loc_addr, cm_node->mapped_rem_port,
2477 NES_CM_LISTENER_ACTIVE_STATE, 0);
3c2d774c
GS		 2478 if (loopbackremotelistener == NULL) {
2479 create_event(cm_node, NES_CM_EVENT_ABORTED);
2480 } else {
3c2d774c
GS		 2481 loopback_cm_info = *cm_info;
2482 loopback_cm_info.loc_port = cm_info->rem_port;
2483 loopback_cm_info.rem_port = cm_info->loc_port;
5647263c
TN		 2484 loopback_cm_info.mapped_loc_port =
2485 cm_info->mapped_rem_port;
2486 loopback_cm_info.mapped_rem_port =
2487 cm_info->mapped_loc_port;
3c2d774c 2488 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
6492cdf3 2489 loopbackremotenode = make_cm_node(cm_core, nesvnic,
615eb715 2490 &loopback_cm_info, loopbackremotelistener);
79fc3d74
FL		 2491 if (!loopbackremotenode) {
2492 rem_ref_cm_node(cm_node->cm_core, cm_node);
2493 return NULL;
2494 }
2495 atomic_inc(&cm_loopbacks);
3c2d774c 2496 loopbackremotenode->loopbackpartner = cm_node;
6492cdf3
FL		 2497 loopbackremotenode->tcp_cntxt.rcv_wscale =
2498 NES_CM_DEFAULT_RCV_WND_SCALE;
3c2d774c 2499 cm_node->loopbackpartner = loopbackremotenode;
6492cdf3 2500 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
615eb715 2501 private_data_len);
6492cdf3 2502 loopbackremotenode->mpa_frame_size = private_data_len;
3c2d774c 2503
6492cdf3
FL		 2504 /* we are done handling this state. */
2505 /* set node to a TSA state */
3c2d774c 2506 cm_node->state = NES_CM_STATE_TSA;
6492cdf3
FL		 2507 cm_node->tcp_cntxt.rcv_nxt =
2508 loopbackremotenode->tcp_cntxt.loc_seq_num;
2509 loopbackremotenode->tcp_cntxt.rcv_nxt =
2510 cm_node->tcp_cntxt.loc_seq_num;
2511 cm_node->tcp_cntxt.max_snd_wnd =
2512 loopbackremotenode->tcp_cntxt.rcv_wnd;
2513 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2514 cm_node->tcp_cntxt.rcv_wnd;
2515 cm_node->tcp_cntxt.snd_wnd =
2516 loopbackremotenode->tcp_cntxt.rcv_wnd;
2517 loopbackremotenode->tcp_cntxt.snd_wnd =
2518 cm_node->tcp_cntxt.rcv_wnd;
2519 cm_node->tcp_cntxt.snd_wscale =
2520 loopbackremotenode->tcp_cntxt.rcv_wscale;
2521 loopbackremotenode->tcp_cntxt.snd_wscale =
2522 cm_node->tcp_cntxt.rcv_wscale;
9d5ab133 2523 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
3c2d774c
GS		 2524 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2525 }
2526 return cm_node;
2527 }
2528
615eb715
TN		 2529 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2530 cm_node->mpa_frame_size = private_data_len;
6492cdf3 2531
615eb715 2532 memcpy(start_buff, private_data, private_data_len);
3c2d774c
GS		 2533
2534 /* send a syn and goto syn sent state */
2535 cm_node->state = NES_CM_STATE_SYN_SENT;
6492cdf3
FL		 2536 ret = send_syn(cm_node, 0, NULL);
2537
2538 if (ret) {
2539 /* error in sending the syn free up the cm_node struct */
2540 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
615eb715
TN		 2541 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2542 cm_node->rem_addr, cm_node->rem_port, cm_node,
2543 cm_node->cm_id);
6492cdf3
FL		 2544 rem_ref_cm_node(cm_node->cm_core, cm_node);
2545 cm_node = NULL;
2546 }
3c2d774c 2547
615eb715 2548 if (cm_node) {
6492cdf3 2549 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
615eb715
TN		 2550 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2551 cm_node->rem_addr, cm_node->rem_port, cm_node,
2552 cm_node->cm_id);
2553 }
3c2d774c
GS		 2554
2555 return cm_node;
2556}
2557
2558
2559/**
2560 * mini_cm_accept - accept a connection
2561 * This function is never called
2562 */
615eb715 2563static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2564{
2565 return 0;
2566}
2567
2568
2569/**
2570 * mini_cm_reject - reject and teardown a connection
2571 */
615eb715 2572static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2573{
2574 int ret = 0;
9d5ab133 2575 int err = 0;
183ecfa3 2576 int passive_state;
9d5ab133
FL		 2577 struct nes_cm_event event;
2578 struct iw_cm_id *cm_id = cm_node->cm_id;
2579 struct nes_cm_node *loopback = cm_node->loopbackpartner;
3c2d774c 2580
6492cdf3 2581 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
615eb715 2582 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
3c2d774c 2583
6492cdf3
FL		 2584 if (cm_node->tcp_cntxt.client)
2585 return ret;
2586 cleanup_retrans_entry(cm_node);
3c2d774c 2587
9d5ab133
FL		 2588 if (!loopback) {
2589 passive_state = atomic_add_return(1, &cm_node->passive_state);
2590 if (passive_state == NES_SEND_RESET_EVENT) {
2591 cm_node->state = NES_CM_STATE_CLOSED;
2592 rem_ref_cm_node(cm_core, cm_node);
2593 } else {
c5a7d489
FL		 2594 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2595 rem_ref_cm_node(cm_core, cm_node);
2596 } else {
2597 ret = send_mpa_reject(cm_node);
2598 if (ret) {
2599 cm_node->state = NES_CM_STATE_CLOSED;
2600 err = send_reset(cm_node, NULL);
2601 if (err)
2602 WARN_ON(1);
615eb715 2603 } else {
c5a7d489 2604 cm_id->add_ref(cm_id);
615eb715 2605 }
c5a7d489 2606 }
9d5ab133
FL		 2607 }
2608 } else {
2609 cm_node->cm_id = NULL;
c5a7d489
FL		 2610 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2611 rem_ref_cm_node(cm_core, cm_node);
2612 rem_ref_cm_node(cm_core, loopback);
2613 } else {
2614 event.cm_node = loopback;
2615 event.cm_info.rem_addr = loopback->rem_addr;
2616 event.cm_info.loc_addr = loopback->loc_addr;
2617 event.cm_info.rem_port = loopback->rem_port;
2618 event.cm_info.loc_port = loopback->loc_port;
2619 event.cm_info.cm_id = loopback->cm_id;
2620 cm_event_mpa_reject(&event);
2621 rem_ref_cm_node(cm_core, cm_node);
2622 loopback->state = NES_CM_STATE_CLOSING;
9d5ab133 2623
c5a7d489
FL		 2624 cm_id = loopback->cm_id;
2625 rem_ref_cm_node(cm_core, loopback);
2626 cm_id->rem_ref(cm_id);
2627 }
9d5ab133
FL		 2628 }
2629
3c2d774c
GS		 2630 return ret;
2631}
2632
2633
2634/**
2635 * mini_cm_close
2636 */
1a855fbf 2637static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
3c2d774c
GS		 2638{
2639 int ret = 0;
2640
2641 if (!cm_core || !cm_node)
2642 return -EINVAL;
2643
2644 switch (cm_node->state) {
6492cdf3
FL		 2645 case NES_CM_STATE_SYN_RCVD:
2646 case NES_CM_STATE_SYN_SENT:
2647 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2648 case NES_CM_STATE_ESTABLISHED:
2649 case NES_CM_STATE_ACCEPTING:
2650 case NES_CM_STATE_MPAREQ_SENT:
2651 case NES_CM_STATE_MPAREQ_RCVD:
2652 cleanup_retrans_entry(cm_node);
2653 send_reset(cm_node, NULL);
2654 break;
2655 case NES_CM_STATE_CLOSE_WAIT:
2656 cm_node->state = NES_CM_STATE_LAST_ACK;
2657 send_fin(cm_node, NULL);
2658 break;
2659 case NES_CM_STATE_FIN_WAIT1:
2660 case NES_CM_STATE_FIN_WAIT2:
2661 case NES_CM_STATE_LAST_ACK:
2662 case NES_CM_STATE_TIME_WAIT:
2663 case NES_CM_STATE_CLOSING:
2664 ret = -1;
2665 break;
2666 case NES_CM_STATE_LISTENING:
886f98a3
FL		 2667 cleanup_retrans_entry(cm_node);
2668 send_reset(cm_node, NULL);
2669 break;
2670 case NES_CM_STATE_MPAREJ_RCVD:
6492cdf3
FL		 2671 case NES_CM_STATE_UNKNOWN:
2672 case NES_CM_STATE_INITED:
2673 case NES_CM_STATE_CLOSED:
c5a7d489 2674 case NES_CM_STATE_LISTENER_DESTROYED:
6492cdf3
FL		 2675 ret = rem_ref_cm_node(cm_core, cm_node);
2676 break;
2677 case NES_CM_STATE_TSA:
2678 if (cm_node->send_entry)
2679 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
615eb715 2680 "send_entry=%p\n", cm_node->send_entry);
6492cdf3
FL		 2681 ret = rem_ref_cm_node(cm_core, cm_node);
2682 break;
3c2d774c 2683 }
3c2d774c
GS		 2684 return ret;
2685}
2686
2687
2688/**
2689 * recv_pkt - recv an ETHERNET packet, and process it through CM
2690 * node state machine
2691 */
4a14f6a7 2692static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
615eb715 2693 struct nes_vnic *nesvnic, struct sk_buff *skb)
3c2d774c
GS		 2694{
2695 struct nes_cm_node *cm_node = NULL;
2696 struct nes_cm_listener *listener = NULL;
2697 struct iphdr *iph;
2698 struct tcphdr *tcph;
2699 struct nes_cm_info nfo;
4a14f6a7 2700 int skb_handled = 1;
03080e5c 2701 __be32 tmp_daddr, tmp_saddr;
3c2d774c 2702
6492cdf3 2703 if (!skb)
4a14f6a7 2704 return 0;
615eb715 2705 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
4a14f6a7 2706 return 0;
3c2d774c
GS		 2707
2708 iph = (struct iphdr *)skb->data;
2709 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
3c2d774c
GS		 2710
2711 nfo.loc_addr = ntohl(iph->daddr);
2712 nfo.loc_port = ntohs(tcph->dest);
2713 nfo.rem_addr = ntohl(iph->saddr);
2714 nfo.rem_port = ntohs(tcph->source);
2715
5647263c
TN		 2716 /* If port mapper is available these should be mapped address info */
2717 nfo.mapped_loc_addr = ntohl(iph->daddr);
2718 nfo.mapped_loc_port = ntohs(tcph->dest);
2719 nfo.mapped_rem_addr = ntohl(iph->saddr);
2720 nfo.mapped_rem_port = ntohs(tcph->source);
2721
03080e5c
HH		 2722 tmp_daddr = cpu_to_be32(iph->daddr);
2723 tmp_saddr = cpu_to_be32(iph->saddr);
2724
63779436 2725 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
03080e5c 2726 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
3c2d774c 2727
6492cdf3
FL		 2728 do {
2729 cm_node = find_node(cm_core,
5647263c
TN		 2730 nfo.mapped_rem_port, nfo.mapped_rem_addr,
2731 nfo.mapped_loc_port, nfo.mapped_loc_addr);
3c2d774c 2732
3c2d774c 2733 if (!cm_node) {
6492cdf3
FL		 2734 /* Only type of packet accepted are for */
2735 /* the PASSIVE open (syn only) */
2736 if ((!tcph->syn) || (tcph->ack)) {
4a14f6a7 2737 skb_handled = 0;
6492cdf3
FL		 2738 break;
2739 }
5647263c
TN		 2740 listener = find_listener(cm_core, nfo.mapped_loc_addr,
2741 nfo.mapped_loc_port,
2742 NES_CM_LISTENER_ACTIVE_STATE, 0);
4a14f6a7
FL		 2743 if (!listener) {
2744 nfo.cm_id = NULL;
2745 nfo.conn_type = 0;
2746 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2747 skb_handled = 0;
6492cdf3
FL		 2748 break;
2749 }
4a14f6a7
FL		 2750 nfo.cm_id = listener->cm_id;
2751 nfo.conn_type = listener->conn_type;
6492cdf3 2752 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
615eb715 2753 listener);
6492cdf3
FL		 2754 if (!cm_node) {
2755 nes_debug(NES_DBG_CM, "Unable to allocate "
615eb715 2756 "node\n");
6492cdf3 2757 cm_packets_dropped++;
3c2d774c 2758 atomic_dec(&listener->ref_count);
6492cdf3
FL		 2759 dev_kfree_skb_any(skb);
2760 break;
3c2d774c 2761 }
6492cdf3
FL		 2762 if (!tcph->rst && !tcph->fin) {
2763 cm_node->state = NES_CM_STATE_LISTENING;
2764 } else {
2765 cm_packets_dropped++;
2766 rem_ref_cm_node(cm_core, cm_node);
2767 dev_kfree_skb_any(skb);
2768 break;
3c2d774c 2769 }
6492cdf3
FL		 2770 add_ref_cm_node(cm_node);
2771 } else if (cm_node->state == NES_CM_STATE_TSA) {
0f0bee8b
FL		 2772 if (cm_node->nesqp->pau_mode)
2773 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2774 else {
2775 rem_ref_cm_node(cm_core, cm_node);
2776 atomic_inc(&cm_accel_dropped_pkts);
2777 dev_kfree_skb_any(skb);
2778 }
6492cdf3 2779 break;
3c2d774c 2780 }
4a14f6a7
FL		 2781 skb_reset_network_header(skb);
2782 skb_set_transport_header(skb, sizeof(*tcph));
2783 skb->len = ntohs(iph->tot_len);
6492cdf3
FL		 2784 process_packet(cm_node, skb, cm_core);
2785 rem_ref_cm_node(cm_core, cm_node);
2786 } while (0);
4a14f6a7 2787 return skb_handled;
3c2d774c
GS		 2788}
2789
2790
2791/**
2792 * nes_cm_alloc_core - allocate a top level instance of a cm core
2793 */
1a855fbf 2794static struct nes_cm_core *nes_cm_alloc_core(void)
3c2d774c 2795{
3c2d774c 2796 struct nes_cm_core *cm_core;
3c2d774c
GS		 2797
2798 /* setup the CM core */
2799 /* alloc top level core control structure */
2800 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2801 if (!cm_core)
2802 return NULL;
2803
2804 INIT_LIST_HEAD(&cm_core->connected_nodes);
2805 init_timer(&cm_core->tcp_timer);
2806 cm_core->tcp_timer.function = nes_cm_timer_tick;
2807
615eb715 2808 cm_core->mtu = NES_CM_DEFAULT_MTU;
3c2d774c
GS		 2809 cm_core->state = NES_CM_STATE_INITED;
2810 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2811
3c2d774c
GS		 2812 atomic_set(&cm_core->events_posted, 0);
2813
3c2d774c
GS		 2814 cm_core->api = &nes_cm_api;
2815
2816 spin_lock_init(&cm_core->ht_lock);
2817 spin_lock_init(&cm_core->listen_list_lock);
2818
2819 INIT_LIST_HEAD(&cm_core->listen_list.list);
2820
2821 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2822
2823 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2824 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2825 cm_core->post_event = nes_cm_post_event;
2826 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2827 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2828
2829 print_core(cm_core);
2830 return cm_core;
2831}
2832
2833
2834/**
2835 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2836 */
1a855fbf 2837static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
3c2d774c
GS		 2838{
2839 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2840
2841 if (!cm_core)
2842 return -EINVAL;
2843
2844 barrier();
2845
615eb715 2846 if (timer_pending(&cm_core->tcp_timer))
3c2d774c 2847 del_timer(&cm_core->tcp_timer);
3c2d774c
GS		 2848
2849 destroy_workqueue(cm_core->event_wq);
2850 destroy_workqueue(cm_core->disconn_wq);
2851 nes_debug(NES_DBG_CM, "\n");
2852 kfree(cm_core);
2853
2854 return 0;
2855}
2856
2857
2858/**
2859 * mini_cm_get
2860 */
1a855fbf 2861static int mini_cm_get(struct nes_cm_core *cm_core)
3c2d774c
GS		 2862{
2863 return cm_core->state;
2864}
2865
2866
2867/**
2868 * mini_cm_set
2869 */
1a855fbf 2870static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
3c2d774c
GS		 2871{
2872 int ret = 0;
2873
2874 switch (type) {
9d5ab133
FL		 2875 case NES_CM_SET_PKT_SIZE:
2876 cm_core->mtu = value;
2877 break;
2878 case NES_CM_SET_FREE_PKT_Q_SIZE:
2879 cm_core->free_tx_pkt_max = value;
2880 break;
2881 default:
2882 /* unknown set option */
2883 ret = -EINVAL;
3c2d774c
GS		 2884 }
2885
2886 return ret;
2887}
2888
2889
2890/**
2891 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2892 * successfully exchanged when this is called
2893 */
2894static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2895{
2896 int ret = 0;
2897
2898 if (!nesqp)
2899 return -EINVAL;
2900
2901 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
615eb715
TN		 2902 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2903 NES_QPCONTEXT_MISC_DROS);
3c2d774c
GS		 2904
2905 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2906 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2907
2908 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2909
2910 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2911
2912 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
615eb715 2913 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
3c2d774c
GS		 2914
2915 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
615eb715
TN		 2916 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2917 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
3c2d774c
GS		 2918
2919 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
615eb715
TN		 2920 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2921 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
3c2d774c
GS		 2922
2923 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2924 nesqp->nesqp_context->ts_recent = 0;
2925 nesqp->nesqp_context->ts_age = 0;
2926 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2927 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2928 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2929 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
615eb715 2930 cm_node->tcp_cntxt.rcv_wscale);
3c2d774c
GS		 2931 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2932 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2933 nesqp->nesqp_context->srtt = 0;
2934 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2935 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
615eb715 2936 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3c2d774c
GS		 2937 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2938 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2939 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2940
2941 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
615eb715
TN		 2942 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2943 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2944 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2945 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2946 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2947 le32_to_cpu(nesqp->nesqp_context->misc));
3c2d774c
GS		 2948 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2949 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2950 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2951
2952 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2953 cm_node->state = NES_CM_STATE_TSA;
2954
2955 return ret;
2956}
2957
2958
2959/**
2960 * nes_cm_disconn
2961 */
2962int nes_cm_disconn(struct nes_qp *nesqp)
2963{
873fcdd4 2964 struct disconn_work *work;
3c2d774c 2965
873fcdd4
DW		 2966 work = kzalloc(sizeof *work, GFP_ATOMIC);
2967 if (!work)
615eb715 2968 return -ENOMEM; /* Timer will clean up */
3c2d774c 2969
873fcdd4
DW		 2970 nes_add_ref(&nesqp->ibqp);
2971 work->nesqp = nesqp;
2972 INIT_WORK(&work->work, nes_disconnect_worker);
2973 queue_work(g_cm_core->disconn_wq, &work->work);
3c2d774c
GS		 2974 return 0;
2975}
2976
2977
2978/**
2979 * nes_disconnect_worker
2980 */
1a855fbf 2981static void nes_disconnect_worker(struct work_struct *work)
3c2d774c 2982{
873fcdd4
DW		 2983 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2984 struct nes_qp *nesqp = dwork->nesqp;
3c2d774c 2985
873fcdd4 2986 kfree(dwork);
3c2d774c 2987 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
615eb715 2988 nesqp->last_aeq, nesqp->hwqp.qp_id);
3c2d774c 2989 nes_cm_disconn_true(nesqp);
c4c3f279 2990 nes_rem_ref(&nesqp->ibqp);
3c2d774c
GS		 2991}
2992
2993
2994/**
2995 * nes_cm_disconn_true
2996 */
1a855fbf 2997static int nes_cm_disconn_true(struct nes_qp *nesqp)
3c2d774c
GS		 2998{
2999 unsigned long flags;
3000 int ret = 0;
3001 struct iw_cm_id *cm_id;
3002 struct iw_cm_event cm_event;
3003 struct nes_vnic *nesvnic;
3004 u16 last_ae;
3005 u8 original_hw_tcp_state;
3006 u8 original_ibqp_state;
d0c49bf3 3007 int disconn_status = 0;
b29a4fc4
DW		 3008 int issue_disconn = 0;
3009 int issue_close = 0;
3010 int issue_flush = 0;
3011 u32 flush_q = NES_CQP_FLUSH_RQ;
3012 struct ib_event ibevent;
3c2d774c
GS		 3013
3014 if (!nesqp) {
3015 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
3016 return -1;
3017 }
3018
3019 spin_lock_irqsave(&nesqp->lock, flags);
3020 cm_id = nesqp->cm_id;
3021 /* make sure we havent already closed this connection */
3022 if (!cm_id) {
3023 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
615eb715 3024 nesqp->hwqp.qp_id);
3c2d774c 3025 spin_unlock_irqrestore(&nesqp->lock, flags);
3c2d774c
GS		 3026 return -1;
3027 }
3028
3029 nesvnic = to_nesvnic(nesqp->ibqp.device);
3030 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
3031
3032 original_hw_tcp_state = nesqp->hw_tcp_state;
615eb715 3033 original_ibqp_state = nesqp->ibqp_state;
3c2d774c
GS		 3034 last_ae = nesqp->last_aeq;
3035
b29a4fc4
DW		 3036 if (nesqp->term_flags) {
3037 issue_disconn = 1;
3038 issue_close = 1;
3039 nesqp->cm_id = NULL;
196f40c8 3040 del_timer(&nesqp->terminate_timer);
b29a4fc4
DW		 3041 if (nesqp->flush_issued == 0) {
3042 nesqp->flush_issued = 1;
3043 issue_flush = 1;
3044 }
3045 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
3046 ((original_ibqp_state == IB_QPS_RTS) &&
3047 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3048 issue_disconn = 1;
3049 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
d0c49bf3 3050 disconn_status = -ECONNRESET;
b29a4fc4
DW		 3051 }
3052
3053 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
3054 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
3055 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
3056 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3057 issue_close = 1;
3058 nesqp->cm_id = NULL;
3059 if (nesqp->flush_issued == 0) {
3060 nesqp->flush_issued = 1;
3061 issue_flush = 1;
3062 }
3063 }
3c2d774c 3064
b29a4fc4
DW		 3065 spin_unlock_irqrestore(&nesqp->lock, flags);
3066
3067 if ((issue_flush) && (nesqp->destroyed == 0)) {
3068 /* Flush the queue(s) */
3069 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
3070 flush_q |= NES_CQP_FLUSH_SQ;
3071 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
3072
3073 if (nesqp->term_flags) {
3074 ibevent.device = nesqp->ibqp.device;
3075 ibevent.event = nesqp->terminate_eventtype;
3076 ibevent.element.qp = &nesqp->ibqp;
784d135f
TN		 3077 if (nesqp->ibqp.event_handler)
3078 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
b29a4fc4
DW		 3079 }
3080 }
3c2d774c 3081
b29a4fc4
DW		 3082 if ((cm_id) && (cm_id->event_handler)) {
3083 if (issue_disconn) {
3c2d774c
GS		 3084 atomic_inc(&cm_disconnects);
3085 cm_event.event = IW_CM_EVENT_DISCONNECT;
b29a4fc4 3086 cm_event.status = disconn_status;
3c2d774c
GS		 3087 cm_event.local_addr = cm_id->local_addr;
3088 cm_event.remote_addr = cm_id->remote_addr;
3089 cm_event.private_data = NULL;
3090 cm_event.private_data_len = 0;
3091
6492cdf3 3092 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
615eb715
TN		 3093 " for QP%u, SQ Head = %u, SQ Tail = %u. "
3094 "cm_id = %p, refcount = %u.\n",
3095 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
3096 nesqp->hwqp.sq_tail, cm_id,
3097 atomic_read(&nesqp->refcount));
3c2d774c 3098
3c2d774c
GS		 3099 ret = cm_id->event_handler(cm_id, &cm_event);
3100 if (ret)
6492cdf3 3101 nes_debug(NES_DBG_CM, "OFA CM event_handler "
615eb715 3102 "returned, ret=%d\n", ret);
3c2d774c
GS		 3103 }
3104
b29a4fc4 3105 if (issue_close) {
3c2d774c 3106 atomic_inc(&cm_closes);
3c2d774c
GS		 3107 nes_disconnect(nesqp, 1);
3108
3109 cm_id->provider_data = nesqp;
3110 /* Send up the close complete event */
3111 cm_event.event = IW_CM_EVENT_CLOSE;
d0c49bf3 3112 cm_event.status = 0;
3c2d774c
GS		 3113 cm_event.provider_data = cm_id->provider_data;
3114 cm_event.local_addr = cm_id->local_addr;
3115 cm_event.remote_addr = cm_id->remote_addr;
3116 cm_event.private_data = NULL;
3117 cm_event.private_data_len = 0;
3118
3119 ret = cm_id->event_handler(cm_id, &cm_event);
615eb715 3120 if (ret)
3c2d774c 3121 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3c2d774c
GS		 3122
3123 cm_id->rem_ref(cm_id);
3c2d774c 3124 }
3c2d774c 3125 }
3c2d774c
GS		 3126
3127 return 0;
3128}
3129
3130
3131/**
3132 * nes_disconnect
3133 */
1a855fbf 3134static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3c2d774c
GS		 3135{
3136 int ret = 0;
3137 struct nes_vnic *nesvnic;
3138 struct nes_device *nesdev;
c12e56ef 3139 struct nes_ib_device *nesibdev;
3c2d774c
GS		 3140
3141 nesvnic = to_nesvnic(nesqp->ibqp.device);
3142 if (!nesvnic)
3143 return -EINVAL;
3144
3145 nesdev = nesvnic->nesdev;
c12e56ef 3146 nesibdev = nesvnic->nesibdev;
3c2d774c
GS		 3147
3148 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
29b4433d 3149 netdev_refcnt_read(nesvnic->netdev));
3c2d774c
GS		 3150
3151 if (nesqp->active_conn) {
3152
3153 /* indicate this connection is NOT active */
3154 nesqp->active_conn = 0;
3155 } else {
3156 /* Need to free the Last Streaming Mode Message */
3157 if (nesqp->ietf_frame) {
c12e56ef
FL		 3158 if (nesqp->lsmm_mr)
3159 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3c2d774c 3160 pci_free_consistent(nesdev->pcidev,
615eb715
TN		 3161 nesqp->private_data_len + nesqp->ietf_frame_size,
3162 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3c2d774c
GS		 3163 }
3164 }
3165
3166 /* close the CM node down if it is still active */
3167 if (nesqp->cm_node) {
3168 nes_debug(NES_DBG_CM, "Call close API\n");
3169
3170 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3c2d774c
GS		 3171 }
3172
3173 return ret;
3174}
3175
3176
3177/**
3178 * nes_accept
3179 */
3180int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3181{
3182 u64 u64temp;
3183 struct ib_qp *ibqp;
3184 struct nes_qp *nesqp;
3185 struct nes_vnic *nesvnic;
3186 struct nes_device *nesdev;
3187 struct nes_cm_node *cm_node;
3188 struct nes_adapter *adapter;
3189 struct ib_qp_attr attr;
3190 struct iw_cm_event cm_event;
3191 struct nes_hw_qp_wqe *wqe;
3192 struct nes_v4_quad nes_quad;
30da7cff 3193 u32 crc_value;
3c2d774c 3194 int ret;
183ecfa3 3195 int passive_state;
c12e56ef
FL		 3196 struct nes_ib_device *nesibdev;
3197 struct ib_mr *ibmr = NULL;
3198 struct ib_phys_buf ibphysbuf;
3199 struct nes_pd *nespd;
7a5efb62 3200 u64 tagged_offset;
615eb715
TN		 3201 u8 mpa_frame_offset = 0;
3202 struct ietf_mpa_v2 *mpa_v2_frame;
3203 u8 start_addr = 0;
3204 u8 *start_ptr = &start_addr;
3205 u8 **start_buff = &start_ptr;
3206 u16 buff_len = 0;
24d44a39
SW		 3207 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3208 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
c12e56ef 3209
3c2d774c
GS		 3210 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3211 if (!ibqp)
3212 return -EINVAL;
3213
3214 /* get all our handles */
3215 nesqp = to_nesqp(ibqp);
3216 nesvnic = to_nesvnic(nesqp->ibqp.device);
3217 nesdev = nesvnic->nesdev;
3218 adapter = nesdev->nesadapter;
3219
3c2d774c 3220 cm_node = (struct nes_cm_node *)cm_id->provider_data;
6492cdf3
FL		 3221 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3222 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3223 nesvnic->netdev->name);
3c2d774c 3224
c5a7d489
FL		 3225 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3226 if (cm_node->loopbackpartner)
3227 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3228 rem_ref_cm_node(cm_node->cm_core, cm_node);
3229 return -EINVAL;
3230 }
3231
dae58728
FL		 3232 passive_state = atomic_add_return(1, &cm_node->passive_state);
3233 if (passive_state == NES_SEND_RESET_EVENT) {
3234 rem_ref_cm_node(cm_node->cm_core, cm_node);
3235 return -ECONNRESET;
3236 }
3c2d774c
GS		 3237 /* associate the node with the QP */
3238 nesqp->cm_node = (void *)cm_node;
6492cdf3 3239 cm_node->nesqp = nesqp;
3c2d774c 3240
4ac79a70 3241
6492cdf3
FL		 3242 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3243 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3c2d774c
GS		 3244 atomic_inc(&cm_accepts);
3245
3246 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
29b4433d 3247 netdev_refcnt_read(nesvnic->netdev));
3c2d774c 3248
615eb715 3249 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
6492cdf3
FL		 3250 /* allocate the ietf frame and space for private data */
3251 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
615eb715
TN		 3252 nesqp->ietf_frame_size + conn_param->private_data_len,
3253 &nesqp->ietf_frame_pbase);
3c2d774c 3254
6492cdf3 3255 if (!nesqp->ietf_frame) {
615eb715 3256 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
6492cdf3
FL		 3257 return -ENOMEM;
3258 }
615eb715 3259 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3c2d774c 3260
615eb715
TN		 3261 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3262 mpa_frame_offset = 4;
3c2d774c 3263
4ac79a70
TN		 3264 if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3265 cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3266 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3267 }
3268
615eb715
TN		 3269 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3270 conn_param->private_data_len);
3c2d774c 3271
615eb715
TN		 3272 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3273 nesqp->private_data_len = conn_param->private_data_len;
3c2d774c 3274
6492cdf3
FL		 3275 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3276 wqe = &nesqp->hwqp.sq_vbase[0];
3277
24d44a39 3278 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
6492cdf3 3279 u64temp = (unsigned long)nesqp;
c12e56ef
FL		 3280 nesibdev = nesvnic->nesibdev;
3281 nespd = nesqp->nespd;
615eb715
TN		 3282 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3283 ibphysbuf.size = buff_len;
3284 tagged_offset = (u64)(unsigned long)*start_buff;
c12e56ef 3285 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
615eb715
TN		 3286 &ibphysbuf, 1,
3287 IB_ACCESS_LOCAL_WRITE,
3288 &tagged_offset);
c12e56ef
FL		 3289 if (!ibmr) {
3290 nes_debug(NES_DBG_CM, "Unable to register memory region"
615eb715
TN		 3291 "for lSMM for cm_node = %p \n",
3292 cm_node);
9256b251 3293 pci_free_consistent(nesdev->pcidev,
615eb715
TN		 3294 nesqp->private_data_len + nesqp->ietf_frame_size,
3295 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
c12e56ef
FL		 3296 return -ENOMEM;
3297 }
3298
3299 ibmr->pd = &nespd->ibpd;
3300 ibmr->device = nespd->ibpd.device;
3301 nesqp->lsmm_mr = ibmr;
3302
615eb715 3303 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
6492cdf3 3304 set_wqe_64bit_value(wqe->wqe_words,
615eb715
TN		 3305 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3306 u64temp);
6492cdf3
FL		 3307 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3308 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
615eb715 3309 NES_IWARP_SQ_WQE_WRPDU);
6492cdf3 3310 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
615eb715 3311 cpu_to_le32(buff_len);
c12e56ef 3312 set_wqe_64bit_value(wqe->wqe_words,
615eb715
TN		 3313 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3314 (u64)(unsigned long)(*start_buff));
6492cdf3 3315 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
615eb715 3316 cpu_to_le32(buff_len);
c12e56ef 3317 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
d2fa9b26
FL		 3318 if (nesqp->sq_kmapped) {
3319 nesqp->sq_kmapped = 0;
3320 kunmap(nesqp->page);
3321 }
6492cdf3
FL		 3322
3323 nesqp->nesqp_context->ird_ord_sizes |=
3324 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
615eb715 3325 NES_QPCONTEXT_ORDIRD_WRPDU);
6492cdf3
FL		 3326 } else {
3327 nesqp->nesqp_context->ird_ord_sizes |=
9d5ab133 3328 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
6492cdf3
FL		 3329 }
3330 nesqp->skip_lsmm = 1;
3c2d774c 3331
3c2d774c
GS		 3332 /* Cache the cm_id in the qp */
3333 nesqp->cm_id = cm_id;
3334 cm_node->cm_id = cm_id;
3335
3336 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3337 cm_id->provider_data = nesqp;
615eb715 3338 nesqp->active_conn = 0;
3c2d774c 3339
6492cdf3
FL		 3340 if (cm_node->state == NES_CM_STATE_TSA)
3341 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
615eb715 3342 cm_node);
6492cdf3 3343
3c2d774c
GS		 3344 nes_cm_init_tsa_conn(nesqp, cm_node);
3345
5647263c
TN		 3346 nesqp->nesqp_context->tcpPorts[0] =
3347 cpu_to_le16(cm_node->mapped_loc_port);
3348 nesqp->nesqp_context->tcpPorts[1] =
3349 cpu_to_le16(cm_node->mapped_rem_port);
6492cdf3 3350
5647263c 3351 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3c2d774c
GS		 3352
3353 nesqp->nesqp_context->misc2 |= cpu_to_le32(
615eb715
TN		 3354 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3355 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 3356
6492cdf3
FL		 3357 nesqp->nesqp_context->arp_index_vlan |=
3358 cpu_to_le32(nes_arp_table(nesdev,
615eb715
TN		 3359 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3360 NES_ARP_RESOLVE) << 16);
3c2d774c
GS		 3361
3362 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
6492cdf3 3363 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3c2d774c
GS		 3364
3365 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3366
3367 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
6492cdf3
FL		 3368 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3369 nesqp->nesqp_context->ird_ord_sizes |=
4ac79a70 3370 cpu_to_le32((u32)cm_node->ord_size);
3c2d774c
GS		 3371
3372 memset(&nes_quad, 0, sizeof(nes_quad));
6492cdf3
FL		 3373 nes_quad.DstIpAdrIndex =
3374 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
5647263c
TN		 3375 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3376 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3377 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3c2d774c
GS		 3378
3379 /* Produce hash key */
30da7cff
FL		 3380 crc_value = get_crc_value(&nes_quad);
3381 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c 3382 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
615eb715 3383 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3c2d774c
GS		 3384
3385 nesqp->hte_index &= adapter->hte_index_mask;
3386 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3387
3388 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3389
6492cdf3 3390 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
615eb715
TN		 3391 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3392 "private data length=%u.\n", nesqp->hwqp.qp_id,
24d44a39
SW		 3393 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3394 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
615eb715
TN		 3395 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3396 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3397 buff_len);
3c2d774c 3398
73ac36ea 3399 /* notify OF layer that accept event was successful */
3c2d774c 3400 cm_id->add_ref(cm_id);
9256b251 3401 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 3402
3403 cm_event.event = IW_CM_EVENT_ESTABLISHED;
d0c49bf3 3404 cm_event.status = 0;
3c2d774c
GS		 3405 cm_event.provider_data = (void *)nesqp;
3406 cm_event.local_addr = cm_id->local_addr;
3407 cm_event.remote_addr = cm_id->remote_addr;
3408 cm_event.private_data = NULL;
3409 cm_event.private_data_len = 0;
4ac79a70
TN		 3410 cm_event.ird = cm_node->ird_size;
3411 cm_event.ord = cm_node->ord_size;
3412
3c2d774c 3413 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 3414 attr.qp_state = IB_QPS_RTS;
3415 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 3416 if (cm_node->loopbackpartner) {
6492cdf3
FL		 3417 cm_node->loopbackpartner->mpa_frame_size =
3418 nesqp->private_data_len;
3c2d774c 3419 /* copy entire MPA frame to our cm_node's frame */
6492cdf3 3420 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
615eb715 3421 conn_param->private_data, conn_param->private_data_len);
3c2d774c
GS		 3422 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3423 }
3424 if (ret)
6492cdf3 3425 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3426 "ret=%d\n", __func__, __LINE__, ret);
3c2d774c
GS		 3427
3428 return 0;
3429}
3430
3431
3432/**
3433 * nes_reject
3434 */
3435int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3436{
3437 struct nes_cm_node *cm_node;
9d5ab133 3438 struct nes_cm_node *loopback;
3c2d774c 3439 struct nes_cm_core *cm_core;
615eb715 3440 u8 *start_buff;
3c2d774c
GS		 3441
3442 atomic_inc(&cm_rejects);
615eb715 3443 cm_node = (struct nes_cm_node *)cm_id->provider_data;
9d5ab133 3444 loopback = cm_node->loopbackpartner;
3c2d774c 3445 cm_core = cm_node->cm_core;
9d5ab133 3446 cm_node->cm_id = cm_id;
3c2d774c 3447
615eb715 3448 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
9d5ab133
FL		 3449 return -EINVAL;
3450
9d5ab133
FL		 3451 if (loopback) {
3452 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3453 loopback->mpa_frame.priv_data_len = pdata_len;
615eb715 3454 loopback->mpa_frame_size = pdata_len;
9d5ab133 3455 } else {
615eb715
TN		 3456 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3457 cm_node->mpa_frame_size = pdata_len;
3458 memcpy(start_buff, pdata, pdata_len);
9d5ab133 3459 }
615eb715 3460 return cm_core->api->reject(cm_core, cm_node);
3c2d774c
GS		 3461}
3462
3463
3464/**
3465 * nes_connect
3466 * setup and launch cm connect node
3467 */
3468int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3469{
3470 struct ib_qp *ibqp;
3471 struct nes_qp *nesqp;
3472 struct nes_vnic *nesvnic;
3473 struct nes_device *nesdev;
3474 struct nes_cm_node *cm_node;
3475 struct nes_cm_info cm_info;
53094c38 3476 int apbvt_set = 0;
24d44a39
SW		 3477 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3478 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
5647263c
TN		 3479 struct iwpm_dev_data pm_reg_msg;
3480 struct iwpm_sa_data pm_msg;
3481 int iwpm_err = 0;
3c2d774c 3482
24d44a39
SW		 3483 if (cm_id->remote_addr.ss_family != AF_INET)
3484 return -ENOSYS;
3c2d774c
GS		 3485 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3486 if (!ibqp)
3487 return -EINVAL;
3488 nesqp = to_nesqp(ibqp);
3489 if (!nesqp)
3490 return -EINVAL;
3491 nesvnic = to_nesvnic(nesqp->ibqp.device);
3492 if (!nesvnic)
3493 return -EINVAL;
615eb715 3494 nesdev = nesvnic->nesdev;
3c2d774c
GS		 3495 if (!nesdev)
3496 return -EINVAL;
3497
24d44a39 3498 if (!laddr->sin_port || !raddr->sin_port)
c5a7d489
FL		 3499 return -EINVAL;
3500
6492cdf3 3501 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
615eb715 3502 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
24d44a39
SW		 3503 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3504 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3505 ntohs(laddr->sin_port));
3c2d774c 3506
6492cdf3 3507 atomic_inc(&cm_connects);
3c2d774c
GS		 3508 nesqp->active_conn = 1;
3509
3c2d774c
GS		 3510 /* cache the cm_id in the qp */
3511 nesqp->cm_id = cm_id;
3c2d774c 3512 cm_id->provider_data = nesqp;
3c2d774c 3513 nesqp->private_data_len = conn_param->private_data_len;
d3e51328 3514
3c2d774c 3515 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
6492cdf3 3516 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
615eb715 3517 conn_param->private_data_len);
3c2d774c 3518
5647263c
TN		 3519 /* set up the connection params for the node */
3520 cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3521 cm_info.loc_port = ntohs(laddr->sin_port);
3522 cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3523 cm_info.rem_port = ntohs(raddr->sin_port);
3524 cm_info.cm_id = cm_id;
3525 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3526
3527 /* No port mapper available, go with the specified peer information */
3528 cm_info.mapped_loc_addr = cm_info.loc_addr;
3529 cm_info.mapped_loc_port = cm_info.loc_port;
3530 cm_info.mapped_rem_addr = cm_info.rem_addr;
3531 cm_info.mapped_rem_port = cm_info.rem_port;
3532
3533 nes_form_reg_msg(nesvnic, &pm_reg_msg);
3534 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
3535 if (iwpm_err) {
3536 nes_debug(NES_DBG_NLMSG,
3537 "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
3538 }
3539 if (iwpm_valid_pid() && !iwpm_err) {
3540 nes_form_pm_msg(&cm_info, &pm_msg);
3541 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_NES);
3542 if (iwpm_err)
3543 nes_debug(NES_DBG_NLMSG,
3544 "Port Mapper query fail (err = %d).\n", iwpm_err);
3545 else
3546 nes_record_pm_msg(&cm_info, &pm_msg);
3547 }
3548
24d44a39 3549 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
5647263c
TN		 3550 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3551 PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
53094c38
FL		 3552 apbvt_set = 1;
3553 }
3c2d774c 3554
5647263c
TN		 3555 if (nes_create_mapinfo(&cm_info))
3556 return -ENOMEM;
3c2d774c
GS		 3557
3558 cm_id->add_ref(cm_id);
3c2d774c
GS		 3559
3560 /* create a connect CM node connection */
6492cdf3 3561 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
615eb715
TN		 3562 conn_param->private_data_len, (void *)conn_param->private_data,
3563 &cm_info);
3c2d774c 3564 if (!cm_node) {
53094c38 3565 if (apbvt_set)
5647263c 3566 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
615eb715
TN		 3567 PCI_FUNC(nesdev->pcidev->devfn),
3568 NES_MANAGE_APBVT_DEL);
6492cdf3 3569
5647263c
TN		 3570 nes_debug(NES_DBG_NLMSG, "Delete mapped_loc_port = %04X\n",
3571 cm_info.mapped_loc_port);
3572 nes_remove_mapinfo(cm_info.loc_addr, cm_info.loc_port,
3573 cm_info.mapped_loc_addr, cm_info.mapped_loc_port);
3c2d774c
GS		 3574 cm_id->rem_ref(cm_id);
3575 return -ENOMEM;
3576 }
3577
4ac79a70
TN		 3578 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3579 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3580 cm_node->ord_size == 0)
3581 cm_node->ord_size = 1;
3582
53094c38 3583 cm_node->apbvt_set = apbvt_set;
3c2d774c 3584 nesqp->cm_node = cm_node;
6492cdf3 3585 cm_node->nesqp = nesqp;
d7ffd507 3586 nes_add_ref(&nesqp->ibqp);
3c2d774c
GS		 3587
3588 return 0;
3589}
3590
3591
3592/**
3593 * nes_create_listen
3594 */
3595int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3596{
3597 struct nes_vnic *nesvnic;
3598 struct nes_cm_listener *cm_node;
3599 struct nes_cm_info cm_info;
3c2d774c 3600 int err;
24d44a39 3601 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3c2d774c 3602
3c2d774c 3603 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
24d44a39 3604 cm_id, ntohs(laddr->sin_port));
3c2d774c 3605
24d44a39
SW		 3606 if (cm_id->local_addr.ss_family != AF_INET)
3607 return -ENOSYS;
3c2d774c
GS		 3608 nesvnic = to_nesvnic(cm_id->device);
3609 if (!nesvnic)
3610 return -EINVAL;
69d51023 3611
3c2d774c
GS		 3612 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3613 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3614
3615 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
24d44a39 3616 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3c2d774c
GS		 3617
3618 /* setup listen params in our api call struct */
5647263c
TN		 3619 cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3620 cm_info.loc_port = ntohs(laddr->sin_port);
3c2d774c
GS		 3621 cm_info.backlog = backlog;
3622 cm_info.cm_id = cm_id;
3623
3624 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3625
5647263c
TN		 3626 /* No port mapper available, go with the specified info */
3627 cm_info.mapped_loc_addr = cm_info.loc_addr;
3628 cm_info.mapped_loc_port = cm_info.loc_port;
3c2d774c
GS		 3629
3630 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3631 if (!cm_node) {
6492cdf3 3632 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
615eb715 3633 __func__, __LINE__);
3c2d774c
GS		 3634 return -ENOMEM;
3635 }
3636
3637 cm_id->provider_data = cm_node;
3638
3639 if (!cm_node->reused_node) {
5647263c
TN		 3640 if (nes_create_mapinfo(&cm_info))
3641 return -ENOMEM;
3642
3643 err = nes_manage_apbvt(nesvnic, cm_node->mapped_loc_port,
615eb715
TN		 3644 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3645 NES_MANAGE_APBVT_ADD);
3c2d774c 3646 if (err) {
6492cdf3 3647 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
615eb715 3648 err);
3c2d774c
GS		 3649 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3650 return err;
3651 }
6e10d2e4 3652 atomic_inc(&cm_listens_created);
3c2d774c
GS		 3653 }
3654
3655 cm_id->add_ref(cm_id);
3656 cm_id->provider_data = (void *)cm_node;
3657
3658
3659 return 0;
3660}
3661
3662
3663/**
3664 * nes_destroy_listen
3665 */
3666int nes_destroy_listen(struct iw_cm_id *cm_id)
3667{
3668 if (cm_id->provider_data)
3669 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3670 else
3671 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3672
3673 cm_id->rem_ref(cm_id);
3674
3675 return 0;
3676}
3677
3678
3679/**
3680 * nes_cm_recv
3681 */
3682int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3683{
4a14f6a7 3684 int rc = 0;
615eb715 3685
3c2d774c 3686 cm_packets_received++;
615eb715 3687 if ((g_cm_core) && (g_cm_core->api))
4a14f6a7 3688 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
615eb715 3689 else
3c2d774c 3690 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
615eb715 3691 " cm is not setup properly.\n");
3c2d774c 3692
4a14f6a7 3693 return rc;
3c2d774c
GS		 3694}
3695
3696
3697/**
3698 * nes_cm_start
3699 * Start and init a cm core module
3700 */
3701int nes_cm_start(void)
3702{
3703 nes_debug(NES_DBG_CM, "\n");
3704 /* create the primary CM core, pass this handle to subsequent core inits */
3705 g_cm_core = nes_cm_alloc_core();
615eb715 3706 if (g_cm_core)
3c2d774c 3707 return 0;
615eb715 3708 else
3c2d774c 3709 return -ENOMEM;
3c2d774c
GS		 3710}
3711
3712
3713/**
3714 * nes_cm_stop
3715 * stop and dealloc all cm core instances
3716 */
3717int nes_cm_stop(void)
3718{
3719 g_cm_core->api->destroy_cm_core(g_cm_core);
3720 return 0;
3721}
3722
3723
3724/**
3725 * cm_event_connected
3726 * handle a connected event, setup QPs and HW
3727 */
1a855fbf 3728static void cm_event_connected(struct nes_cm_event *event)
3c2d774c 3729{
3c2d774c
GS		 3730 struct nes_qp *nesqp;
3731 struct nes_vnic *nesvnic;
3732 struct nes_device *nesdev;
3733 struct nes_cm_node *cm_node;
3734 struct nes_adapter *nesadapter;
3735 struct ib_qp_attr attr;
3736 struct iw_cm_id *cm_id;
3737 struct iw_cm_event cm_event;
3c2d774c 3738 struct nes_v4_quad nes_quad;
30da7cff 3739 u32 crc_value;
3c2d774c 3740 int ret;
24d44a39
SW		 3741 struct sockaddr_in *laddr;
3742 struct sockaddr_in *raddr;
3743 struct sockaddr_in *cm_event_laddr;
3c2d774c
GS		 3744
3745 /* get all our handles */
3746 cm_node = event->cm_node;
3747 cm_id = cm_node->cm_id;
3748 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3749 nesqp = (struct nes_qp *)cm_id->provider_data;
3750 nesvnic = to_nesvnic(nesqp->ibqp.device);
3751 nesdev = nesvnic->nesdev;
3752 nesadapter = nesdev->nesadapter;
24d44a39
SW		 3753 laddr = (struct sockaddr_in *)&cm_id->local_addr;
3754 raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3755 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3c2d774c 3756
615eb715 3757 if (nesqp->destroyed)
3c2d774c 3758 return;
3c2d774c
GS		 3759 atomic_inc(&cm_connecteds);
3760 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
615eb715 3761 " local port 0x%04X. jiffies = %lu.\n",
24d44a39
SW		 3762 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3763 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3c2d774c
GS		 3764
3765 nes_cm_init_tsa_conn(nesqp, cm_node);
3766
3767 /* set the QP tsa context */
5647263c
TN		 3768 nesqp->nesqp_context->tcpPorts[0] =
3769 cpu_to_le16(cm_node->mapped_loc_port);
3770 nesqp->nesqp_context->tcpPorts[1] =
3771 cpu_to_le16(cm_node->mapped_rem_port);
3772 nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3c2d774c
GS		 3773
3774 nesqp->nesqp_context->misc2 |= cpu_to_le32(
6492cdf3
FL		 3775 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3776 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3c2d774c 3777 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
6492cdf3
FL		 3778 nes_arp_table(nesdev,
3779 le32_to_cpu(nesqp->nesqp_context->ip0),
3c2d774c
GS		 3780 NULL, NES_ARP_RESOLVE) << 16);
3781 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3782 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3783 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3784 nesqp->nesqp_context->ird_ord_sizes |=
6492cdf3
FL		 3785 cpu_to_le32((u32)1 <<
3786 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
4ac79a70
TN		 3787 nesqp->nesqp_context->ird_ord_sizes |=
3788 cpu_to_le32((u32)cm_node->ord_size);
3c2d774c
GS		 3789
3790 /* Adjust tail for not having a LSMM */
615eb715 3791 /*nesqp->hwqp.sq_tail = 1;*/
3c2d774c 3792
615eb715 3793 build_rdma0_msg(cm_node, &nesqp);
6492cdf3 3794
615eb715
TN		 3795 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3796 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3c2d774c
GS		 3797
3798 memset(&nes_quad, 0, sizeof(nes_quad));
3799
6492cdf3
FL		 3800 nes_quad.DstIpAdrIndex =
3801 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
5647263c
TN		 3802 nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3803 nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3804 nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3c2d774c
GS		 3805
3806 /* Produce hash key */
30da7cff
FL		 3807 crc_value = get_crc_value(&nes_quad);
3808 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3c2d774c 3809 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
615eb715 3810 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3c2d774c
GS		 3811
3812 nesqp->hte_index &= nesadapter->hte_index_mask;
3813 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3814
3815 nesqp->ietf_frame = &cm_node->mpa_frame;
615eb715 3816 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3c2d774c
GS		 3817 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3818
3c2d774c
GS		 3819 /* notify OF layer we successfully created the requested connection */
3820 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
d0c49bf3 3821 cm_event.status = 0;
3c2d774c 3822 cm_event.provider_data = cm_id->provider_data;
24d44a39
SW		 3823 cm_event_laddr->sin_family = AF_INET;
3824 cm_event_laddr->sin_port = laddr->sin_port;
3c2d774c
GS		 3825 cm_event.remote_addr = cm_id->remote_addr;
3826
6492cdf3 3827 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
615eb715
TN		 3828 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3829 cm_event.ird = cm_node->ird_size;
3830 cm_event.ord = cm_node->ord_size;
3c2d774c 3831
5647263c 3832 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3c2d774c
GS		 3833 ret = cm_id->event_handler(cm_id, &cm_event);
3834 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3835
3836 if (ret)
6492cdf3 3837 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3838 "ret=%d\n", __func__, __LINE__, ret);
6492cdf3
FL		 3839 attr.qp_state = IB_QPS_RTS;
3840 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3c2d774c 3841
6492cdf3 3842 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
615eb715 3843 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3c2d774c
GS		 3844
3845 return;
3846}
3847
3848
3849/**
3850 * cm_event_connect_error
3851 */
1a855fbf 3852static void cm_event_connect_error(struct nes_cm_event *event)
3c2d774c
GS		 3853{
3854 struct nes_qp *nesqp;
3855 struct iw_cm_id *cm_id;
3856 struct iw_cm_event cm_event;
3857 /* struct nes_cm_info cm_info; */
3858 int ret;
3859
3860 if (!event->cm_node)
3861 return;
3862
3863 cm_id = event->cm_node->cm_id;
615eb715 3864 if (!cm_id)
3c2d774c 3865 return;
3c2d774c
GS		 3866
3867 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3868 nesqp = cm_id->provider_data;
3869
615eb715 3870 if (!nesqp)
3c2d774c 3871 return;
3c2d774c
GS		 3872
3873 /* notify OF layer about this connection error event */
3874 /* cm_id->rem_ref(cm_id); */
3875 nesqp->cm_id = NULL;
3876 cm_id->provider_data = NULL;
3877 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
c5a7d489 3878 cm_event.status = -ECONNRESET;
3c2d774c
GS		 3879 cm_event.provider_data = cm_id->provider_data;
3880 cm_event.local_addr = cm_id->local_addr;
3881 cm_event.remote_addr = cm_id->remote_addr;
3882 cm_event.private_data = NULL;
3883 cm_event.private_data_len = 0;
3884
24d44a39
SW		 3885#ifdef CONFIG_INFINIBAND_NES_DEBUG
3886 {
3887 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3888 &cm_event.local_addr;
3889 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3890 &cm_event.remote_addr;
3891 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3892 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3893 }
3894#endif
3c2d774c
GS		 3895
3896 ret = cm_id->event_handler(cm_id, &cm_event);
3897 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3898 if (ret)
6492cdf3 3899 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
615eb715 3900 "ret=%d\n", __func__, __LINE__, ret);
6492cdf3 3901 cm_id->rem_ref(cm_id);
3c2d774c 3902
6492cdf3 3903 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3c2d774c
GS		 3904 return;
3905}
3906
3907
3908/**
3909 * cm_event_reset
3910 */
1a855fbf 3911static void cm_event_reset(struct nes_cm_event *event)
3c2d774c
GS		 3912{
3913 struct nes_qp *nesqp;
3914 struct iw_cm_id *cm_id;
3915 struct iw_cm_event cm_event;
3916 /* struct nes_cm_info cm_info; */
3917 int ret;
3918
3919 if (!event->cm_node)
3920 return;
3921
3922 if (!event->cm_node->cm_id)
3923 return;
3924
3925 cm_id = event->cm_node->cm_id;
3926
3927 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3928 nesqp = cm_id->provider_data;
f9f3f1e0
FL		 3929 if (!nesqp)
3930 return;
3c2d774c
GS		 3931
3932 nesqp->cm_id = NULL;
3933 /* cm_id->provider_data = NULL; */
3934 cm_event.event = IW_CM_EVENT_DISCONNECT;
d0c49bf3 3935 cm_event.status = -ECONNRESET;
3c2d774c
GS		 3936 cm_event.provider_data = cm_id->provider_data;
3937 cm_event.local_addr = cm_id->local_addr;
3938 cm_event.remote_addr = cm_id->remote_addr;
3939 cm_event.private_data = NULL;
3940 cm_event.private_data_len = 0;
3941
183ecfa3 3942 cm_id->add_ref(cm_id);
f9f3f1e0 3943 ret = cm_id->event_handler(cm_id, &cm_event);
183ecfa3
FL		 3944 atomic_inc(&cm_closes);
3945 cm_event.event = IW_CM_EVENT_CLOSE;
d0c49bf3 3946 cm_event.status = 0;
183ecfa3
FL		 3947 cm_event.provider_data = cm_id->provider_data;
3948 cm_event.local_addr = cm_id->local_addr;
3949 cm_event.remote_addr = cm_id->remote_addr;
3950 cm_event.private_data = NULL;
3951 cm_event.private_data_len = 0;
3952 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3953 ret = cm_id->event_handler(cm_id, &cm_event);
3954
3c2d774c
GS		 3955 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3956
3957
3958 /* notify OF layer about this connection error event */
3959 cm_id->rem_ref(cm_id);
3960
3961 return;
3962}
3963
3964
3965/**
3966 * cm_event_mpa_req
3967 */
1a855fbf 3968static void cm_event_mpa_req(struct nes_cm_event *event)
3c2d774c 3969{
615eb715 3970 struct iw_cm_id *cm_id;
3c2d774c
GS		 3971 struct iw_cm_event cm_event;
3972 int ret;
3973 struct nes_cm_node *cm_node;
24d44a39
SW		 3974 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3975 &cm_event.local_addr;
3976 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3977 &cm_event.remote_addr;
3c2d774c
GS		 3978
3979 cm_node = event->cm_node;
3980 if (!cm_node)
3981 return;
3982 cm_id = cm_node->cm_id;
3983
3984 atomic_inc(&cm_connect_reqs);
3985 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
615eb715 3986 cm_node, cm_id, jiffies);
3c2d774c
GS		 3987
3988 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
d0c49bf3 3989 cm_event.status = 0;
3c2d774c
GS		 3990 cm_event.provider_data = (void *)cm_node;
3991
24d44a39
SW		 3992 cm_event_laddr->sin_family = AF_INET;
3993 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3994 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3c2d774c 3995
24d44a39
SW		 3996 cm_event_raddr->sin_family = AF_INET;
3997 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3998 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
9d5ab133 3999 cm_event.private_data = cm_node->mpa_frame_buf;
615eb715 4000 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4ac79a70
TN		 4001 if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
4002 cm_event.ird = NES_MAX_IRD;
4003 cm_event.ord = NES_MAX_ORD;
4004 } else {
615eb715
TN		 4005 cm_event.ird = cm_node->ird_size;
4006 cm_event.ord = cm_node->ord_size;
4ac79a70 4007 }
9d5ab133
FL		 4008
4009 ret = cm_id->event_handler(cm_id, &cm_event);
4010 if (ret)
4011 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
615eb715 4012 __func__, __LINE__, ret);
9d5ab133
FL		 4013 return;
4014}
4015
4016
4017static void cm_event_mpa_reject(struct nes_cm_event *event)
4018{
615eb715 4019 struct iw_cm_id *cm_id;
9d5ab133
FL		 4020 struct iw_cm_event cm_event;
4021 struct nes_cm_node *cm_node;
4022 int ret;
24d44a39
SW		 4023 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4024 &cm_event.local_addr;
4025 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4026 &cm_event.remote_addr;
9d5ab133
FL		 4027
4028 cm_node = event->cm_node;
4029 if (!cm_node)
4030 return;
4031 cm_id = cm_node->cm_id;
4032
4033 atomic_inc(&cm_connect_reqs);
4034 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
615eb715 4035 cm_node, cm_id, jiffies);
9d5ab133
FL		 4036
4037 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
4038 cm_event.status = -ECONNREFUSED;
4039 cm_event.provider_data = cm_id->provider_data;
4040
24d44a39
SW		 4041 cm_event_laddr->sin_family = AF_INET;
4042 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4043 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
9d5ab133 4044
24d44a39
SW		 4045 cm_event_raddr->sin_family = AF_INET;
4046 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4047 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3c2d774c 4048
9d5ab133 4049 cm_event.private_data = cm_node->mpa_frame_buf;
615eb715 4050 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
9d5ab133
FL		 4051
4052 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
615eb715 4053 "remove_addr=%08x\n",
24d44a39
SW		 4054 cm_event_laddr->sin_addr.s_addr,
4055 cm_event_raddr->sin_addr.s_addr);
3c2d774c
GS		 4056
4057 ret = cm_id->event_handler(cm_id, &cm_event);
4058 if (ret)
9d5ab133 4059 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
615eb715 4060 __func__, __LINE__, ret);
3c2d774c
GS		 4061
4062 return;
4063}
4064
4065
4066static void nes_cm_event_handler(struct work_struct *);
4067
4068/**
4069 * nes_cm_post_event
4070 * post an event to the cm event handler
4071 */
1a855fbf 4072static int nes_cm_post_event(struct nes_cm_event *event)
3c2d774c
GS		 4073{
4074 atomic_inc(&event->cm_node->cm_core->events_posted);
4075 add_ref_cm_node(event->cm_node);
4076 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4077 INIT_WORK(&event->event_work, nes_cm_event_handler);
6492cdf3 4078 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
615eb715 4079 event->cm_node, event);
3c2d774c
GS		 4080
4081 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4082
4083 nes_debug(NES_DBG_CM, "Exit\n");
4084 return 0;
4085}
4086
4087
4088/**
4089 * nes_cm_event_handler
4090 * worker function to handle cm events
4091 * will free instance of nes_cm_event
4092 */
4093static void nes_cm_event_handler(struct work_struct *work)
4094{
6492cdf3 4095 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
615eb715 4096 event_work);
3c2d774c
GS		 4097 struct nes_cm_core *cm_core;
4098
6492cdf3 4099 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3c2d774c 4100 return;
6492cdf3 4101
3c2d774c
GS		 4102 cm_core = event->cm_node->cm_core;
4103 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
615eb715 4104 event, event->type, atomic_read(&cm_core->events_posted));
3c2d774c
GS		 4105
4106 switch (event->type) {
6492cdf3
FL		 4107 case NES_CM_EVENT_MPA_REQ:
4108 cm_event_mpa_req(event);
4109 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
615eb715 4110 event->cm_node);
6492cdf3
FL		 4111 break;
4112 case NES_CM_EVENT_RESET:
4113 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
615eb715 4114 event->cm_node);
6492cdf3
FL		 4115 cm_event_reset(event);
4116 break;
4117 case NES_CM_EVENT_CONNECTED:
4118 if ((!event->cm_node->cm_id) ||
615eb715 4119 (event->cm_node->state != NES_CM_STATE_TSA))
3c2d774c 4120 break;
6492cdf3
FL		 4121 cm_event_connected(event);
4122 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
4123 break;
9d5ab133
FL		 4124 case NES_CM_EVENT_MPA_REJECT:
4125 if ((!event->cm_node->cm_id) ||
615eb715 4126 (event->cm_node->state == NES_CM_STATE_TSA))
9d5ab133
FL		 4127 break;
4128 cm_event_mpa_reject(event);
4129 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
4130 break;
4131
6492cdf3
FL		 4132 case NES_CM_EVENT_ABORTED:
4133 if ((!event->cm_node->cm_id) ||
615eb715 4134 (event->cm_node->state == NES_CM_STATE_TSA))
3c2d774c 4135 break;
6492cdf3
FL		 4136 cm_event_connect_error(event);
4137 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
4138 break;
4139 case NES_CM_EVENT_DROPPED_PKT:
4140 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
4141 break;
4142 default:
4143 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
4144 break;
3c2d774c
GS		 4145 }
4146
4147 atomic_dec(&cm_core->events_posted);
4148 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4149 rem_ref_cm_node(cm_core, event->cm_node);
4150 kfree(event);
4151
4152 return;
4153}
Linux kernel - Deliverables
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